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Abstract: Electric precipitator is a kind of dust collection equipment commonly used in cement plants. The advantage is: The dust collection efficiency is generally over 98% and the power consumption is low. It takes about 0.36MJ (0.1~0.8kw·h) to purify 1000m3 of dust-containing gas. ； Fluid resistance is small, generally 50~100Pa ； Strong adaptability to various types of gases, capable of handling higher temperature and corrosive gases ； The waste gas treatment volume is large and the maintenance cost is low. The disadvantage is: Large one-time investment in equipment ； The dust collection effect is not good for certain types of dust. For example, when the dust specific resistance is lower than 104Ω·cm or higher than 1011Ω·cm, the dust collection efficiency is very low, and the management and operation level are required to be high. Energy and Environmental Protection Forum 2] 2~ `1} * p1H1@&b Preface 1X-] +`0f7C)m Environmental issues are one of the hot issues that are generally concerned by countries around the world today. Environmental protection is an important task related to people's health and the development of industrial and agricultural production. The harm of dust is that after it is generated, it spreads around with the surrounding air flow. In particular, most of the fine dust remains suspended in the air for a long time and floats, causing environmental pollution and causing public nuisance. Since cement factories are one of the industrial sectors that cause serious dust pollution, dust collection is of great significance to protect the environment, protect people's health, and better develop cement production. ;f!A8M'C;V2S% gwww.eppbbs.com 1. Main factors affecting the performance of electrostatic precipitator: www.eppbbs.com 'D"n%q(sz)G In addition to being related to the structure, the performance of the electrostatic precipitator is largely affected by the smoke performance and operating conditions. The main influencing factors are: Specific resistance value of dust, dust concentration, dust particle composition, gas composition, temperature, humidity, dew point value, sulfur content, dust collection air leakage, electrode hypertrophy, electrode operation, etc. Energy and Environmental Protection Forum._.] 4B/N$q!x7N2O$r 1. Share information on the impact of flue gas performance, improve technical levels, and optimize project quality)C;k&X!] * C%N 1.1 The influence of dust specific resistance&Y;I5M W9b$m3W Energy Environmental Protection Forum The resistance value measured along the height direction of a powder column with a height of 1cm per square centimeter area is called the specific resistance of dust, and the unit is "ohm·cm". The specific resistance of dust is an indicator of the electrical conductivity of dust, and it has a great impact on the performance of the electrostatic precipitator. Figure 1-1 is the relationship curve between dust specific resistance and electric dust collection efficiency. It is not difficult to see that the dust collection efficiency is relatively high when the specific resistance of the dust is in the range of 104~1011Ω·cm. www.eppbbs.com 8?2j#V3z-\;X8| L4F,v When the resistance of the electrostatic precipitator is below 104Ω·cm, the charged dust particles are neutralized and even positively charged the moment they reach the plate. In this way, they can easily break away from the precipitation electrode and re-enter the airflow, thus * * Reduce the efficiency of electric dust collection. 6j9}5I0P,l,yQ;i B4u shares information, improves technical level, and optimizes engineering quality. For dust with a specific resistance above 1011Ω·cm, when the dust settles on the sedimentation plate, the charge it carries is difficult to neutralize, and a negative electric field will gradually form on the deposition plate. The electric field will gradually increase, making it unable to adapt to the environment full of gas. Ions are generated in the pores of the loose covering layer, neutralizing some of the negatively charged dust particles, which is commonly known as "reverse corona". At the same time, due to the release of positive ions from the precipitation electrode, the electric field between the electric dust collectors changes to an electric field similar to that formed by two tips. This electric field is easy to operate at a low voltage. http://www.wftianjie.com/sunyeabiz_houtai/ewebeditor/UploadFile/200713117414566.JPG Very penetrating. Therefore, when the dust specific resistance is greater than 1011Ω·cm, the efficiency of electric dust collection does not decrease significantly. Energy and Environmental Protection Forum&I0Z9w4o%P4I Therefore, only when the specific resistance of the dust is in the range of 104~1011Ω·cm, after the negatively charged dust particles reach the precipitation plate, neutralization proceeds at an appropriate speed, and the dust collection efficiency is high. This is the most ideal area for the dust collector to operate. In this area, the dust collection efficiency has little relationship with the change of the specific resistance value. * \&M v:u%] 8d/A&w' Xwww.eppbbs.com 1.2 Effect of dust concentration 8s:h5U/D'v1p.R4a2U+J Energy Environmental Protection Forum The increase in dust concentration in gases causes an increase in dust ions. Although the corona current they form is not large, the electron charge they form is very large, which severely inhibits the generation of corona current and prevents dust particles from obtaining sufficient charges, resulting in a reduction in dust collection efficiency. In particular, the more dust with a particle size of about 1 μm, the more serious this impact will be. When the content of flue gas is higher than the specified value, the corona current is reduced to zero. This phenomenon is called corona sealing. At this time, the gas purification effect is significantly deteriorated. Share information, improve technical level, and optimize project quality'p-z7x6R5h$^,l,r;L9U In order to prevent the occurrence of corona sealing phenomenon, the dust concentration entering the flue gas of the electrostatic precipitator should be limited. Cement plants generally require that the concentration of gas entering the electrostatic precipitator should not exceed 60 g/m3 (80 g/m3 when using a thorn corona electrode). Therefore, in order to ensure the normal operation of the electrostatic precipitator at certain dust collection points, a pre-dust collector is often installed in front of the electrostatic precipitator to ensure that the concentration of the gas entering the electrostatic precipitator is lower than the specified value. (|4T,K)X#D/b8^%X Energy and Environmental Protection Forum 1.3 The influence of dust particle composition0 Energy and Environmental Protection Forum * k U:n8W)e Y$d!_%~ Flue gas temperature has a great influence on the working performance of electric dust collector, which is mainly reflected in the following three aspects: 1.4.1 Effect of temperature on dust specific resistance www.eppbbs.com $|6d4y/w,V * c5R$n1n2w The influence of flue gas temperature on dust specific resistance can be seen from Figure 1-2. Changes in flue gas temperature will cause fluctuations in the dust specific resistance value. And affect the dust collection effect. Therefore, when the electric precipitator is working, the flue gas temperature should be kept within a small fluctuation range to ensure the normal operation of the dust collector. 2I0z * n$^8H Energy and Environmental Protection Forum 1.4.2 Effect of temperature on gas viscosity Energy and Environmental Protection Forum * ?4l'N)j)@ * E,x0u It is well known that when the gas temperature rises, the movement of gas molecules intensifies, and the internal friction between the moving molecular layers increases, thereby increasing the viscosity of the gas. When the electrostatic precipitator is running, the driving speed at which the charged dust in the electric field moves toward the precipitation pole due to the electric field force has a certain relationship with the viscosity of the dust-containing gas. The gas temperature is extremely high, the greater the viscosity of the gas, and the lower the velocity of the charged dust. Energy and Environmental Protection Forum#L0f%k6^4S%u1^ 1.4.3 Effect of temperature on gas breakdown voltage!n7`'Y9d * O0v&o,P Energy Environmental Protection Forum The breakdown voltage of a gas is proportional to the density of the gas, and the density of the gas depends to a large extent on the gas temperature. When the gas pressure remains constant, the density of the gas is inversely proportional to the absolute temperature of the gas. Therefore, when the gas temperature decreases, the gas density increases and the breakdown voltage of the gas increases accordingly. Due to the increase in breakdown voltage, the voltage of the electric field of the dust collector is higher, thus * * Improved dust collection efficiency. * u"F(w4@%?+F:^Energy and Environmental Protection Forum It can be seen from the above analysis that it is better for the gas temperature to be lower. Therefore, some electric precipitators are equipped with a gas cooling device, which not only reduces the flue gas temperature, but also facilitates http://www.wftianjie.com/sunyeabiz_houtai/ewebeditor/UploadFile/200713117414932.JPG The waste heat of exhaust gas is used. However, it should be noted that the temperature of the flue gas cannot be too low. If it is too low, the water vapor and sulfur trioxide in the gas will easily condense and condense, and the collected dust will stick to the electrodes, worsening the dust collection effect. At the same time, the equipment condenses and dews, which can easily cause the steel materials to corrode and damage the equipment. When the quartz casing is lower than the dew point temperature, the condensed material will cause leakage and discharge inside the casing, making the electric precipitator unable to operate normally. Therefore, the flue gas temperature is generally required to be 20 to 30°C higher than the dew point temperature. Share information, improve technical levels, and optimize project quality+^;J%U$a,K1T;z 1.5 Effect of gas velocity 8Q:M+g$|3K In an electric precipitator, the higher the airflow speed passing through the electric field, the lower the dust collection efficiency. On the contrary, the higher the dust collection efficiency. Because when the air flow speed increases, the following phenomena will occur: Share information, improve technical level, and optimize project quality: U6P%dk-\"~)J-C4t/F 1.5.1 The time for dust-containing gas to pass through the electric field is shortened, and some dust is taken out of the electric precipitator by the air flow before it can be collected. 6e&G9z7M!S7U6} 1.5.2 The secondary rise of dust on the electric ground increases, that is, the dust on the electrode that has been captured is taken away again by the adjusted air flow when it vibrates down. Energy and Environmental Protection Forum/w'Z)j$_7k/{ * b * ^ 1.5.3 Ash leakage in spaces other than the effective electric field (such as the lower ash half, the upper space, and the gap between the side plates and the shell) is easily carried away by the air flow. Share information, improve technical levels, and optimize project quality; G2o * x5W * X)c+g6Y+\ Therefore, it is of great significance to avoid excessively high electric field wind speeds. Table 1-3 is the relationship curve between airflow speed and dust collection efficiency in an electric collector from a foreign factory for reference. ;v(L&c)A4`3U' iwww.eppbbs.com 1.6 Effect of Flue Gas Humidity Energy Environmental Protection Forum/B * Z$O2s0s4R-V When the electric precipitator is running, the humidity of the flue gas being processed directly affects the electric field voltage, dust resistance value and dust collection efficiency. !B)|8\ D(Ik * m 1.6.1 The flue gas humidity increases and the air breakdown voltage increases. The main reason is that: First, because water molecules in the electric field can absorb a large number of electrons, the water molecules are charged and transformed into slow-moving negative ions, thus significantly reducing the number of electrons in the electric field space. Ionization intensity weakens ； Second, since water molecules are heavier than air molecules, have larger volumes and more complex structures, they have more opportunities to collide with free electrons during the development of gas dissociation. This shortens the mean free path of free electrons accelerating in the electric field. Moreover, when they collide with each other, the kinetic energy of the electrons will be consumed and converted into heat energy, making it difficult to develop collision ionization. ； Third, the slow-moving water vapor negative ions formed due to the adsorption of electrons have a greater chance of combining with positive ions in the corona zone than those that escape quickly. http://www.wftianjie.com/sunyeabiz_houtai/ewebeditor/UploadFile/200713117414387.JPG more, thus intensifying the recombination of positive and negative charges. The ionization of the gas is weakened, the corona current is reduced, the withstand voltage strength of the air gap is increased, and the breakdown voltage is increased. Energy and Environmental Protection Forum 8z"}.F/l6q-y.x+K(x As the electric field voltage increases, not only does the corona discharge remain strong, but also as the voltage increases, the electric field intensity increases, making the electrostatic precipitator operate stably with increased voltage. Therefore, increasing the humidity of the flue gas can largely compensate for the defects of reduced density, reduced breakdown voltage, and low dust collection efficiency caused by high exhaust gas temperature or low air pressure. www.eppbbs.com 't;H7Z b * y G(t9~&E 1.6.2 Effect of flue gas humidity on dust specific resistance (p';g,P$l,R(}1G:R9m1S 2.1 Corona wire ash formation energy and environmental protection forum |5S,b"y#v;qn#U!j!e&N As mentioned before, the finer the corona pole, the more intense it will be produced. However, because some dust particles in the ion zone around the corona electrode acquire positive charges and neutralize with the negative polarity corona electrode, a small amount of dust adheres to the corona electrode, which is commonly known as corona electrode hypertrophy. The corona wire becomes ash-enlarged and enlarged, which will significantly reduce the corona effect and worsen the working condition of the dust collector. 'Uw:w ^ * b5q$v)|$ Lwww.eppbbs.com The sooting and enlargement of the corona wire is not only related to the structure of the corona wire and the nature of the soot, but also to the operation. In order to solve the sooting and enlargement of the corona wire, on the one hand, the design of the electrostatic precipitator should be improved to increase the vibration force of the corona electrode system. On the other hand, regular cleaning should be strengthened to keep the corona electrode clean. ;B!h+J8X#S Energy Environmental Protection Forum 2.2 Precipitation Extreme Ash Energy Environmental Protection Forum 5}3W6u7q * B(\7t u7| When the dust on the surface of the precipitation plate is too thick, the conductivity of the charged dust on the plate will be reduced, thus * * Reduce the dust collection efficiency of the electric precipitator. When the polar plate is in continuous vibration, the thickness of the dust layer formed on the surface of the polar plate remains unchanged. The newly deposited dust on the polar plate is immediately vibrated away from the polar plate and is taken away again by the airflow, causing a secondary flying of larger dust. On the contrary, when "stop rapping", the dust layer continues to thicken, reducing the conductivity of charged dust on the electrode plate, causing the dust collection efficiency to drop rapidly. Therefore, between the two situations of "stop rapping" and leaving the electrode plate in "continuous vibration", there must be an intermittent time (commonly known as the rapping cycle) in which the dust collection efficiency is the optimal value, which has a great impact on the efficiency of electrostatic dust collection. Generally, the selection of the blowing cycle depends on the properties of the gas being processed (mainly dust concentration, dust viscosity, etc.), and its value is determined through experiments. For electric dust collectors in cement plants, the rapping cycle is generally 2.5 to 3 minutes. +] )Q-~+T!S * ~3t/h/`({Share information, improve technical level, optimize project quality 2.3 Air leakage 0x(n0\5j"L# 2.4 Spark rate during operation Energy Environmental Protection Forum+e P2z-B:R!@7i+j In the electrostatic precipitator, when the applied voltage is increased, the corona current will also increase. When the voltage increases to a certain value, gas breakdown will occur on a certain channel at the two poles. However, since the power supply device of a general electrostatic precipitator can quickly block and cut off the current, the current after breakdown is limited and arc cannot be formed. At this time, the discharge only stays in the spark discharge stage. Experiments show that the influence of spark discharge frequency of electric dust collection on dust collection efficiency is shown in Figure 1-4. The optimal spark frequency value in production depends on the nature of the flue gas, the adhesion state of dust in the device, etc. It is generally determined through experiments. Share information, improve technical level, and optimize project quality2z'x;@$h6c7M:{!N 3. Operation of electric precipitator9v8h * R:|:h+p2t,?/e/G Share information, improve technical level, and optimize project quality 3.1 Operation of electric precipitator 2O!\)c$j7{Energy and Environmental Protection Forum 3.1.1 Inspection before putting the electric precipitator into operation: www.eppbbs.com v0m(b * Before putting K4Y.N9p k8P/U electrostatic precipitator into operation, the following inspections should generally be made: Energy and Environmental Protection Forum "J/\0H'~1w.wu ① There is no debris in the dust collector casing and the insulating box, and the entrance doors have been closed tightly. ,a0t(U"Q6X!S'D&N+G6l ② The structure of each conveyor is intact (including sedimentation pole vibration device, corona pole vibration device, ash discharge device, air lock device, etc.), flexible rotation, and each lubrication point has sufficient lubricating oil. http://www.wftianjie.com/sunyeabiz_houtai/ewebeditor/UploadFile/200713117414276.JPG ③ If valves are installed at the inlet and outlet of the dust collector (inlet and outlet valves are often installed in coal mill electric dust collection), the inlet and outlet valves should be opened. ④ Check leakage devices: Are the positions of various switches and knobs correct? ； Are all wiring connections intact? ； Are each fuse in good condition: U9r1?2q9t)g+d1u)w"m Energy Environmental Protection Forum Good ； Whether each printing board is tightly inserted ； Whether the insulation resistance between the high-voltage end of the rectifier and the ground (in reverse direction) and the low-voltage end against the ground reaches the specified value (the insulation resistance of the rectifier transformer to the ground should be greater than 1000M ohms, and the insulation resistance of the low-voltage line to the ground should be greater than 300M ohms). !b#`6j, "H!Y+d * r3Y:w ⑥ There is no leakage in the high-voltage cable head and high-voltage silicon rectifier. Energy and Environmental Protection Forum&S8{4M7B4C!W g6?/h ⑦ The three-point (or four-point) switch operating mechanism is flexible and the position is correct. * c)J0n:d!F;I)K1|2x Energy and Environmental Protection Forum ⑧ Check the insulation condition of the motor of the rapping device and the motor of the smoke exhaust device. The insulation resistance should not be less than 0.5M ohms. 0b"@&l3A * T!N2r ⑨ Check the carbon monoxide meter: Is the cable connection good? ； Use clean gas (backflush cleaning device) to purge the sampling pipe to prevent swelling from entering the infrared analysis chamber. ； The four dry filters are filled with 4/5 silica gel and 1/5 absorbent cotton ； Is the gas line system sealed and smooth? ； The light source, air chamber, and detection chamber of the infrared instrument should be positioned on the same optical axis, and the printed circuit board and components should be well fixed. Share information, improve technical level, and optimize project quality; L6`3h9J4Y ⑩ Check the humidification tower: Water leaks are repaired at all connections of the nozzles in the tower ； Open the stop valve in front of the nozzle (the backup nozzle does not open), close the drain valve and return pipe valve ； Check whether each door of the tower is closed and intact ； Open the water inlet valve of the water tank in the pump room, fill the water tank with water, and observe whether the water flow in the overflow pipe of the water tank is continuous. Energy and Environmental Protection Forum&;P;s#g)P * v0N9p%` 3.2 Startup of the electric precipitator 4k:H7L;l!d&Y3q!f Energy Environmental Protection Forum ① Four hours before the dust collector is put into use, the pipe heater in the insulating box should be connected to heat the insulating casing. Some dust collectors operate under positive pressure and are equipped with a hot air device. The hot air device should be started to heat the insulation sleeve 4 hours before driving. Four hours before starting the coal mill electric precipitator, the hot air device with a large capacity should be started to heat the internal components of the dust collector so that the temperature of the internal components is higher than the flue gas dew point temperature. 1A * `#L2W+a8g1P0g5M Share information, improve technical level, and optimize project quality ② Start the air locking device motor and ash discharge device motor of the dust collector. ;cv ] -U'P1j2X Energy and Environmental Protection Forum ③ Start the motors in the dust collector's corona pole beating device, settling pole rapping device, air flow distribution plate rapping device, etc., as well as the vibration motor on the ash hopper wall. $b(g'N5Q&f8s0e(y Energy Environmental Protection Forum ④ Turn on the electric heating device in the ash hopper, corona electrode vibration transmission device, and explosion-proof valve. 6@-f'F4d.u!a(K%S7Y1} ⑤ Start the carbon monoxide detection device. Energy and Environmental Protection Forum,a;J!GD%F ⑥ Start the exhaust fan of the process system to allow the flue gas to pass through the dust collector. * l5D, W1www.eppbbs.com ⑦ Move the three-point high-voltage isolating switch to the power supply position. ,s * o1D,ik$C!Y7I Energy Environmental Protection Forum ⑧ Start the high-voltage silicon rectifier to send power to the electric field. ;e+E w7K.x.j7@4H;H,t+^ 2Rwww.eppbbs.com 3.2.1 For the dust collection system at the end of the kiln with a humidification tower, when the flue gas temperature at the inlet of the humidification tower is higher than 250°C, it can start working. The operation sequence is as follows: .y$b2\7b9A:e _&o'j ① Start the ash discharge device under the humidification tower. :@0G%f,P * { * V&n:C1O Energy Environmental Protection Forum ② Open the water inlet valve of the required water pump so that the water in the water tank flows into the pump. )w+v&Y.G9e6Q$i' d8twww.eppbbs.com ③Start the water pump motor and adjust the motor speed so that the pump pressure is within the specified range. :Y#V;u$U(y6h:|* v Energy Environmental Protection Forum 3.3 Operation of electrostatic precipitator +t/w2e2K(w2v4n+L Energy Environmental Protection Forum ① When the electrostatic precipitator is used at the end of cement rotary kiln or for drying, if the CO content of the flue gas exceeds 2%, an alarm should be sounded and the furnace watcher should be notified in time to take measures. When the CO content exceeds 2.5%, the high-voltage silicon rectifier should be closed. If the CO content continues to rise to 4%, it means that the process system is operating extremely abnormally. At this time, the system exhaust fan should be turned off and the relevant departments should be notified for processing. In order to check whether the gas intake system is working normally at any time, a mercury U-tube manometer can be connected to the pipeline. When the negative pressure value of the manometer is found to rise suddenly, the gas intake system may be blocked. At this time, you can check whether the metal filter sleeve or air pipe is blocked. If the pressure difference between the two ends of the U-shaped pressure gauge is very small, the pipeline may leak. If there is insufficient air volume during the air intake process, the air inlet of the vacuum pump may be blocked by dust. .X$?:K2I1{3u#] ;| The metal filter sleeve of p Energy Environmental Protection Forum must be inspected every half month. If most of the pores are blocked, the filter sleeve should be replaced with a new one. When installing, you must pay attention to the tight connection between the end caps at both ends and the filter sleeve, otherwise dust will enter the bronchus and cause pipeline blockage. (C * q * r4Q ] .L Share information, improve technical level, and optimize project quality. When the electric precipitator is used in the pulverized coal preparation system, if the CO content of the flue gas exceeds "normal value + 700%", 1 to 2 bottles of CO2 should be opened appropriately to reduce the CO content, and then observe the changes in the CO content. If the CO content still increases, continue to increase the amount of CO2 sprayed. Energy and Environmental Protection Forum 6F!b6j.p1h6`:cm/d+d ② For coal mill electric precipitators, if the temperature at the ash hopper exceeds 90°C, it means that a combustion failure has occurred in the hopper. At this time, 1 to 2 bottles of CO2 should be sprayed into the hopper to prevent the combustion and explosion of pulverized coal. Energy Environmental Protection Forum: p1F7a5K'T T5q ③ For the clinker cooling electromechanical dust collector, when the inlet flue gas temperature exceeds 300°C, the water spray device should be started to spray water into the cooling machine grate bed to reduce the flue gas temperature to below 250°C. www.eppbbs.com $q&f%] &M u3I.\5N#z. ④ During the operation of the electric precipitator, check the operation of each rapping device and ash discharge transmission mechanism at least every 4 hours. Share information, improve technical levels, and optimize project quality 3s T,q"if)_/D2|%z#R)|2o6I/w ⑤ Post workers should record the following operating data every hour: ⑴The current and voltage values at the low-voltage end of each electric field high-voltage silicon rectifier, and the current and voltage values at the high-voltage end ； ⑵Temperature values at the inlet and outlet of the dust collector ； ⑶Temperature values of each ash hopper of the dust collector ； ⑷The operation status of each rapping mechanism and ash discharge mechanism ； ⑸CO content in flue gas ； ⑹Sprinkler usage time ； ⑺Dust concentration at the dust collector outlet ； ⑻Fault records. Energy and Environmental Protection Forum 6x4s-t'?6J-G)u7k, ⑥ You should also pay attention during operation: ⑴In order to prevent the high-voltage silicon rectifier from operating overvoltage, the high-voltage switch must not be switched while the equipment is running or the high-voltage switch must be turned off during high-voltage operation. ； ⑵The high-voltage silicon rectifier is not allowed to operate in an open circuit, and the high-voltage input circuit cannot be disconnected. ； ⑶During high-voltage operation, the operating salesperson is not allowed to enter the high-voltage isolation room. 2^#l!f6j9v * T3r Energy Environmental Protection Forum 3.4 has a dust collection system with a humidification tower. The following points should be mastered during operation.: +W9p!c,o4n Energy Environmental Protection Forum Check the water tank overflow pipe every hour to see if the water flow is normal. 6f&A(q;t * o'm2r9a ① If the flue gas decreases due to the decrease in kiln output and the flue gas temperature at the outlet of the humidification tower is lower than 120°C, the speed of the water pump motor should be appropriately adjusted to reduce the amount of water sprayed. However, it should be noted that the nozzle pressure must not be lower than the specified value. If the temperature is still low when the pressure is lower than the specified value, several nozzles can be appropriately closed. If the outlet temperature of the humidification tower is higher than 180°C, increase the number of working nozzles. #^6H1i$S7z Energy and Environmental Protection Forum ② If the pump motor is working at normal speed and the working pressure of the nozzle suddenly increases, it means that one of the nozzles is clogged. You can judge by closing the valve in front of the nozzle and observing whether there is a change in the pressure on the pipeline. Clogged nozzles must be dealt with or replaced in time. www.eppbbs.com 5r&~'g7U(q V5t ③ Check the ash discharge humidity at the lower part of the humidification tower once every working shift, and judge whether the upper ash hopper is blocked from the ash discharge of the ash discharge device and the amount of ash discharge from the device, and deal with it in time. "{0|2_:k#w8t)`5\#oEnergy and Environmental Protection Forum④ Record the following data every hour: Humidification tower inlet and outlet flue gas temperature ； Pump number, nozzle number, quantity and working pressure. 5{:Z7v.l"T"K Share information, improve technical levels, and optimize project quality Conclusion: Energy and Environmental Protection Forum+J * ~;k;^4g1t!N&i)u Electrostatic precipitator has been increasingly widely used in cement plants. It is an important part of the cement production process line and one of the main equipment of the cement plant. Therefore, it is very necessary to operate and manage the electrostatic precipitator so that its operation rate can be synchronized with the host machine. In particular, the new dry process cement production process line does not have a bypass chimney. As long as the main engine is running, the only path for dusty exhaust gas is the humidification tower-electrostatic precipitator (some are equipped with drying and grinding equipment). Whether the electrostatic precipitator can operate stably and efficiently in the long term directly affects the economic benefits of the factory and the environmental quality of the atmosphere. !i-N7s4|%p:L0N Energy Environmental Protection Forum When the electric precipitator is operating normally, duty records should be kept to record the mechanical and electrical operation conditions, faults, downtime and reasons of the electric precipitator and ancillary equipment. E;P;t)h.e0E+i)QEnergy Environmental Protection Forum Each piece of equipment must be based on the requirements of the manufacturer or design unit and the user's experience. Develop operation management procedures and preventive maintenance plans. Seize every opportunity, especially when the main engine is being overhauled, the electric precipitator should be inspected, the distance between poles should be adjusted based on daily records, and broken wires and dropped anvils should be replaced. Tighten bolts, clean away dust, etc. Problems discovered on a daily basis should be dealt with and resolved within this time. Although the electric precipitator has few rotating parts. It has a long service life, and the three major faults recognized in the past (broken corona wire, dropped hammer anvil and broken insulator) have also been gradually reduced with technological advancement. However, its mechanical structural parts work under the conditions of high air pressure, high voltage and dusty exhaust gas. The problems of wear and electrochemical culture center are more prominent, and some parts must be replaced. Energy and environmental protection theory