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Original start-up plan for pressure swing adsorption decarbonization 1. Preparations before the first start-up After the installation of the device is completed, and after strict debugging of the automatic control system, the control system is used to perform purge and air tightness tests on the device. After passing the test, check whether the screen installation in the adsorption tower meets the requirements. If so, install the adsorbent. However, because the raw material gas, product gas and analytical gas of this device all contain a large amount of hydrogen, if the oxygen in the system is not eliminated in advance, baozha will easily form in the early stages of start-up. * Therefore, before inputting the raw material gas, the entire device must be evacuated with a vacuum pump, and the entire system must be replaced with inert gas to make the oxygen content of the entire system less than 0.5%. After the above work is completed, all valves should be closed. 1. Preparations before starting the automatic control system 1.1 Check the adjustment system device The adjustment system adopts electric type III adjustment instrument. The field transmitting unit is connected via wires. Therefore, after installation, first check whether there are any errors in the wiring, and then send in electrical signals to check whether the zero position and full scale of all instruments are correct. Then conduct no-load simulation debugging of the entire system, including the manual control system, to see whether the actuator action is correct. 1.2 Check the stroke of the actuator (regulating valve). Input a 4-20mA signal to the regulating valve to check whether it has full stroke. 1.3 Check the microcomputer control function. After the main signal of the microcomputer control system is converted from multi-channel reversing station to liquid, control the program-controlled valves on site. After the system is installed as required, first check whether there are any errors in the wiring, and then follow the following steps to further check the dynamic status. ； 1.3.1 Enter the main screen of process flow control. First, in the process state of 10-tower operation, set the time of each step arbitrarily according to its timing table. The program will be executed from the initial state. Check whether the reset, pause, step, and time setting function keys are normal. 1.3.2 Carry out no-load function debugging on the entire program-controlled system (control system 1 - multi-channel reversing station - program-controlled valve), send a signal to the on-site program-controlled valve, press the pause interval to check whether the action of a certain step of the system is normal, if normal, exit the pause button, and then press the step button. Press the pause button once to execute one step of the program. Check the system action and exit the pause button. This cycle repeats until all the working steps of the 10 adsorption towers have been completed. 1.3.3 Check the switching system: Arbitrarily set a switching method from 10 towers to 8 towers, and check whether the working steps of the adsorption tower have changed significantly during the switching process, that is, whether any tower with a higher pressure is directly reversed or evacuated, etc. ； After the inspection of this method is completed, switch the 8-tower process back to 10-tower operation, and also check whether the switching steps are reasonable. ； Then set another 10-to-8 switching method to check… ； Repeat this check until all switching methods are checked. 1.3.4 Enter the self-adjusting system parameter setting screen, set all parameters according to the prompts, and set any self-adjusting control method for inspection. ； Arbitrarily change the flow rate, purified gas CO2 content, adsorption pressure, etc., and check whether other parameters such as time, valve opening, etc. have changed. Whether the changing trend is correct, etc. Finally, turn off the computer and 24V output power supply, and check whether the program-controlled valves are all closed. 1.4 Check the flow rate and calculation system for adjustment and inspection according to the flow meter instruction manual. 1.5 CO2 analyzer and vacuum pump When the analyzer passes into the CO2 standard sample gas, the microcomputer displays the same content as the CO2 standard sample gas. When a small amount of air is added to the analysis, the CO2 content displayed on the input analysis computer should decrease. If this is not the case, it means the analyzer wiring is wrong and the wiring needs to be checked. While the above work is being carried out, the vacuum pump should also be inspected and tested to ensure that it is in normal standby condition. 2. Feeding, start-up and operation shall be carried out after the entire device has been inspected and debugged on the process, instrumentation and automatic control systems, and the entire device is evacuated with a vacuum pump and replaced with inert gas. The device is ready for feeding and driving at any time. 2.1 Preparation work before start-up 2.1.1 Setting of process valves Fully open the stop valves before and after the regulating valve, the pre-valve before the safety valve, fully open the root valves of all pressure gauges or pressure transmitters, and fully open the vacuum pump inlet and outlet stop valves. 2.1.2 Settings of the adjustment system (see the table below) Adjustment system code Control mode Operating valve code Valve position setting HC-101 Manual HV-101 1/3 PIC-102 Manual PV-101 1/3 2.1.3 Startup of the microcomputer program control system Turn on the power of the microcomputer program control system, enter the program control screen, and set the time of each step according to the requirements of normal operation of the process. (The self-adjusting system is not put into use at this time) and it is in self-check or manual state. 2.2 Startup 2.2.1 Put the microcomputer programmable control system into automatic working mode, slowly open the raw gas inlet valve V-101 and feed the material into the adsorption tower. Since the flow meter measurement is inaccurate when the feed volume is initially small, the size of the flow meter should be controlled at a rate that increases the adsorption pressure by 0.2Mpa per minute to prevent over-flow operation. At the same time, open the corresponding vacuum pump inlet valve and start the vacuum pump according to the normal operation of the vacuum pump. ； When the adsorption pressure rises to 0.1Mpa, the program-controlled system switches once step by step (that is, press the step key), and switches repeatedly several times. At this time, the raw material gas is replaced in the adsorption tower. ； In the future, whenever the pressure of the adsorption tower increases by 0.1-0.2 MPa, the program-controlled system will switch step by step until it reaches the adsorption pressure. During the pressure increase process, pay attention to immediately opening the reverse discharge manual main valve when the pressure of the six uniform drops is higher than normal pressure, and pay attention to adjusting the final pressure increase flow rate and the forward flow rate. 2.2.2 When the adsorption pressure rises to the rated working pressure, put PICA-102 into the automatic control state, slowly open the large valve V101, and gradually increase the feed amount of raw gas. At this time, it reaches about 1/4-1/2 of the rated working flow. At this time, the unqualified purified gas temporarily enters the vent main pipe VT101 through the valve V140 for venting. 2.2.3 When the adsorption pressure rises to the working pressure (0.8 MPa), and after working under this pressure condition for 4-5 cycles, the purified gas CO2 analysis system ARA-101 can be started. The sample gas flow of the instrument is opened to the mark. When the CO2 value in the gas is close to the required concentration, it means that the purified gas is almost qualified. In this case, the valve V140 can be closed and opened. The product gas is manually output to the main valve, and the purified gas is sent out of bounds. 2.2.4 During the process of performing the above operations, PV102 should be continuously adjusted to make the raw gas flow gradually approach the rated flow. At the same time, pay attention to adjusting the final filling regulating valve and the smooth exhaust output stop valve, so that the device is finally in a coordinated and stable working state. At this time, the device can be set to run automatically and the relevant parameters can be set at the same time. The initial driving stage requires a long period of parameter adjustment time. Once the parameters are adjusted, Most of the parameters do not need to be changed, so the device will be fully automatic. Safety operating procedures for pressure swing adsorption decarburization positions 1. Operators must operate according to the operation manual, and all new personnel must undergo safety education and operating law * Only then can you start the operation. During actual operation, those who have not passed the technical and operational method examinations are not allowed to operate independently. 2. Operators must be neatly dressed when working and are not allowed to bring flammable or explosive items into the site. Strictly carry out shift handovers, strictly conduct patrol inspections, strictly control process indicators, and strictly follow operating procedures and relevant regulations. 3. When the pressure of the equipment is not relieved, any repair work, welding, tightening screws, etc. are absolutely prohibited, and it is prohibited to use iron tools to knock the equipment. 4. The pressure gauge used by the equipment must be inspected and sealed. If the pointer of the pressure gauge does not return to zero or the error is greater than its series, it must not be used anymore. The pressure gauge must be inspected and sealed once a year. 5. Smoking and starting fires are strictly prohibited within the boundaries of this device. Any containers and pipelines containing explosive and burning gases that need to be repaired must be reported to the factory safety department and the workshop for approval before starting a fire. They must be replaced and purged with nitrogen. After on-site analysis is passed and safety measures have been taken, fires can only be started after obtaining a fire certificate. If the fire certificate is not approved, it is not isolated from the production system, cleaning and replacement are not qualified, and surrounding flammable materials are not eliminated. Fire analysis is not carried out on time, fire protection measures are not taken, and there is no supervision. Fire is strictly prohibited. 6. Ensure the air tightness of equipment, pipelines and valves. After inspection and maintenance, strict leak detection should be carried out. Only after passing the inspection can the vehicle be driven. Pay attention to prevent gas leakage at all times during use. 7. When an instrument system fails, it should be repaired by instrument personnel, who should work closely with process operators. When restarting after shutdown for maintenance, attention must be paid to the pressure in the adsorption tower to prevent high-pressure reverse discharge. 8. Strictly control process indicators to prevent over-temperature and over-pressure. 9. Strictly implement the patrol inspection system to ensure the normal operation of equipment and pipelines. Pressure swing adsorption decarburization cleaning and blowing plan 1. Blow out the hydraulic system 1. Pickle and clean each pipeline of the hydraulic system before installation to ensure that there are no foreign objects or dust accumulation. , 2. After installation, use compressed air to blow out the hydraulic system pipes one by one. Follow the oil pipeline process and sequentially disassemble the connections with the oil tank, oil pump, solenoid valve station, hydraulic valve cylinder, accumulator and other equipment of the oil pump station, blow them out one by one with compressed air, and at the same time tap the pipelines with a wooden hammer to knock off the debris on the inner wall. 3. Add diesel and start the oil pump to clean the entire system. Finally, drain the diesel and clean the diesel, debris and putty in the fuel tank, cylinder, hoses and oil pipes. 4. Add anti-wear hydraulic oil, start the oil pump for trial operation, observe the action of each valve, and deal with any problems in time. After each valve operates normally for 48 hours, drain the oil in the system for filtering, and clean the oil tank, oil cylinder, hoses, and oil pipes. 5. Finally, add anti-wear hydraulic oil, and the hydraulic system will enter the normal standby state. Continue to observe the valve operating status during operation. 2. Blow out the process system: 1. Before blowing, check whether all equipment pipelines, flanges, valves, instruments, safety devices, etc. are complete and whether the process is smooth to ensure that it meets the requirements of production safety and process. Before blowing, remove the relevant pressure gauges and equipment in the system, first blow out the pressure gauges, pipelines, and equipment together, and then use the pressure stored in each tower to blow out the pipeline segments. 2. Prepare a wooden hammer, tinplate, white cloth or white paint to check whether the blowing is thorough. 3. Cleaning must be approved by the cleaning test team before it can be stopped. Blow-out requirements: 1. The entire blowing requirement ensures that rust, welding slag and debris are not brought into the equipment to prevent clogging of the drain valve and damage to the valve core of the hydraulic automatic control valve. Disassemble the blind plates or short pipes of each main pipe and add baffles. 2. The requirements for blowing each equipment and each pipe section must be recorded in detail. After blowing out the previous section, connect the flange and short pipe, and prepare to blow out the next section. 3. Use compressed air as the medium for blowing. ； When blowing, use a wooden hammer to tap the pipes and welds to ensure that there are no iron particles, welding slag and other debris. 4. When encountering special circumstances or endangering safety during the blowing process, the blowing must be stopped. 5. Blow out the pressure: ≤0.6mpa blowing step: 1. Turn on the oil pump and close all program-controlled valves and manual valves. 2. Use an air compressor to inflate and accumulate pressure in Tower A until the pressure rises to 0.3Mpa-0.5Mpa. 3. Blow out each main pipe, remove the blind plates at both ends of each main pipe, use manual control to open the air inlet and product gas of tower A, lower the valves, and blow out each main pipe. 4. Use the same method to pressurize the other towers and blow out each main pipe. When using Tower J to blow out, install the blind plate at the west end of the main pipe, remove the blind plate at the east end, and finally blow out each main pipe. 5. After the main pipe is blown clean, install the main pipe blind plate. 6. Pressurize tower A and blow out the branch pipes connected to each main pipe in sequence. When each branch pipe is connected to the equipment, the equipment flange should be disassembled, and the flange should be installed after blowing. 7. Blow out each branch pipe thoroughly without leaving any dead ends. 8. When blowing out each pipeline, use a wooden hammer to hit the welded pipe joints and other parts, especially the welds, to ensure that all welding slag, rust and other debris are blown away. 9. After blowing, install all flanges and blind plates. Be prepared for a pressure test.