[Time-Limited Quick Answer Contest, Phase 3] 005 (Completed) (4 winners + 40 wealth points)

1 Use shielded pumps. 2 Use motors with different explosion-proof ratings. 3 Control the temperature of the pipeline according to the properties of the material. 4 All possible leakage points are subjected to strong sealing.

The delivery pipelines must be equipped with anti-static bonding, vehicles must have anti-static grounding, the filling port should be a dip pipe, and the filling rate should be kept below 3 M/S. Tank truck liquid unloading connection pipe: A shut-off valve is installed to prevent accidental activation of the tank truck ； Emergency shut-off valves are installed to enable response even at the early stages of an accident ； The distance between the tank truck and the unloading point should not exceed the width of the vehicle ； Unloading is under the supervision of a dedicated person. \"Safety Technical Management for Flammable and Explosive Tank Areas\": Requirements for unloading materials from trucks: 1) Once the truck arrives at the site, it must obey the instructions of the personnel responsible for unloading at the platform. The truck escort is only responsible for connecting the hoses on the truck; they are not allowed to operate the equipment, valves, or other components at the unloading platform. The personnel assigned to unloading at the tank area are responsible for connecting the pipes and operating the valves ； 2) The discharge conduit must be properly supported and fixed; the connection between the discharge conduit and the valve should be secure. The valve should be opened gradually, and if there is any leakage, it must be resolved before discharge can resume ； 3) The unloading speed of flammable and explosive materials must not be too fast, and static electricity discharge facilities must be available ； Once the liquid level in the storage tank reaches the safe level, forced discharge into the tank is prohibited ； 4) Throughout the unloading process, the driver and the escort are not allowed to leave their posts without permission; they are also prohibited from smoking, drinking, sleeping, or chatting in the cab. The escort must remain on site throughout to ensure safety supervision ； 5) Stop the unloading of flammable and explosive materials in the event of lightning strikes, storms, or fires in the vicinity ； 6) The material inside the tank truck must be completely unloaded, after which the valves should be closed, and the unloading ducts and support frames should be stored away ； 7) It is strictly prohibited to clean and handle residual hazardous materials in the production facility area or at the unloading platforms; it is also not allowed to use the fire-fighting water or production water available in those areas to wash vehicles ； 8) After unloading is complete, the tank truck should immediately leave the unloading platform.

1. The pipelines and equipment used for transportation should be equipped with proper static electricity grounding facilities in accordance with relevant standards, to prevent the accumulation of static electricity that could pose a hazard； 2. The pipelines and equipment used for transportation shall be equipped with necessary safety valves and pressure relief systems in accordance with relevant specifications, to ensure the safe operation of the system; in the event of overpressure, the material should be discharged into storage tanks or other safe locations ； 3. All electrical and instrumentation equipment should be selected in accordance with fire and explosion protection standards, and appropriate explosion-proof devices should be used to ensure the safe operation of the equipment ； 4. Install combustible gas detectors in areas where leaks are possible (such as valves and flange connections), so that any leak can be detected and addressed promptly ；

Due to the flammability and explosiveness of the medium, the transportation process poses a high risk of fire. 1. Transfer methods and equipment (1) Gravity flow The liquid is poured into a high-level tank, and it flows to lower areas due to the pressure difference resulting from its height. 　(2) Siphonage: A process that uses atmospheric pressure differences to draw liquid out of a device. This method utilizes a siphon tube inserted into a tank to create a negative pressure within the tube, allowing the liquid to rise under the force of atmospheric pressure along the siphon tube and be transported to a container at a lower level; it is often used to remove accumulated material or water at the bottom of equipment. 　(3) Pumping Transporting liquids by utilizing the mechanical action of various pumps. Based on their different working principles, pumps can generally be divided into 3 categories: vane pumps, positive displacement pumps, and fluid action pumps. 　(4) Vacuum pumping This method is suitable for transporting liquids over short distances under conditions of low vacuum. A certain degree of vacuum is created within the container and pipes, thereby pumping the material into the container. 　(5) Compression gas propulsion Utilizing the pressure of a certain fluid to transport liquids over long distances. The most common type is the acid egg (air lift), which involves introducing compressed air into the device to create a certain pressure, and then forcing the liquid inside the device out through an outlet pipe. This method is often used to transport highly corrosive liquids such as acids and bases. 　　 2 Main ways hazards occur: (1) Prone to combustion; (2) Prone to explosion; (3) Fires caused by open flames; (4) Fires caused by sparks from friction or impact; (5) Fires resulting from equipment failures and defects; (6) Fires caused by electrical circuits; (7) Accidents due to improper management or operation; (8) Spread of fires due to inadequate fire control and extinguishing efforts. 3 Fire and explosion prevention measures: (1) Select appropriate conveying equipment. Siphon and gravity-fed conveying methods are not only economical but also safe; where the conveying distance is short and such methods can be implemented, they should be used. 　　From a safety perspective, it is most appropriate to use steam reciprocating pumps for transporting flammable liquids, as they are driven by steam, which helps to prevent the generation of sparks. 　　When using gas to transport flammable liquids, compressed air should not be used; instead, inert gases such as nitrogen or carbon dioxide can be employed for transportation. Only flammable liquids with a high flash point and a boiling point above 130°C can be pumped using air. 　　(2) Controlling and eliminating open flames as well as sparks from friction and impact – Controlling the generation of open flames, restricting their use, and implementing strict fire management are essential for preventing fires in pump rooms. When heating, open flames should be avoided, and strict rules such as vehicle restrictions and no-smoking policies must be observed. 　　Keep the bearings well lubricated ； Non-sparking metals are used for the friction and impact parts ； Wearing shoes with nails is strictly prohibited in hazardous areas. 　　(3) Installation of safety devices A safety valve should be installed on the outlet pipeline of the positive displacement pump; its vent pipe should be connected to the inlet pipeline of the pump, and an emergency shutdown interlock device is advisable. 　　Positive displacement pumps draw in and discharge liquid by changing the volume inside the pump chamber. If the discharge pipeline becomes blocked, the pressure inside the pump rises sharply, which can lead to an explosion; therefore, a bypass return control valve must be installed to allow some of the liquid to flow back from the bypass pipe into the suction pipe. This control valve must be opened before starting the pump. 　　In pump rooms where fires of Class A or Class B hazard exist, an automatic monitoring and alarm system must be installed to detect dangerous concentrations of flammable vapors and gases in the air of the pump room and to trigger alarms in a timely manner. It is also interlocked with emergency ventilation, power supply disconnection, and the closing of electric gate valves. 　　At the valve bank location in the pump room, there should be facilities to introduce flammable liquids into the collection well through a water seal; the collection well shall be covered, and there shall be facilities for pumping them out.

1. Choose the type of pump; for example, an electromagnetic pump can be used. 2. Control the flow rate of the medium within the pipes. 3. Install dual valves to ensure effective isolation. 4. Set up a sealed discharge system as well as an emergency release system

1. Ensure proper static electricity grounding as well as static bonding of the pipes, in order to prevent the accumulation of static charges. 2. Use pumps equipped with explosion-proof motors, and control the flow rate of the liquid so that it isn’t too high. 3. Install online gas analyzers at areas prone to leaks (such as flanges) to monitor the level of combustible gases at all times. 4. Equip the pipes with safety valves; these valves release the fluid into a recovery tank or a safe location when the pressure in the pipes exceeds safe levels. 5. Install double-valve shut-off systems on the pipes. That’s all I can think of, haha

It is usually stored by cryogenic freezing under pressure in a low-temperature warehouse. The warehouse should be cool and well-ventilated, and it must be stored separately from oxygen, chlorine, flammable materials, oxides, organic substances, etc., away from sources of fire and heat, with direct sunlight prevented. It can be transported via liquid or gas pipelines; if stored in steel cylinders, protection from collisions is necessary. It can also be transported through pipelines, or stored and transported using steel cylinders, tank trucks, etc. Careful handling is required to prevent damage to the packaging. It can be transported by tank trucks or in galvanized iron drums, and protection against moisture and rain must be ensured during storage and transportation.

The transportation of flammable and explosive materials is generally carried out using closed transportation systems for both transport and storage； Centrifugal pumps are often used for pumps that transport flammable and explosive substances ； Pumps and pipelines used for transporting flammable and explosive materials should be properly grounded to prevent static electricity ； Appropriate flow rates should be selected for pipelines transporting flammable and explosive materials to avoid the generation of excessive static electricity.

1. The delivery pipelines must be equipped with anti-static bonding, vehicles must have anti-static grounding, the filling port should be a dip pipe, and the filling rate should be kept below 3 M/S. 2. Loading requirements: 1) Once the tank truck arrives at the site, it must follow the instructions of the personnel responsible for unloading at the platform. The truck’s escort is only tasked with connecting the hoses on the truck; they are not allowed to operate the equipment, valves, or other components at the unloading platform. The personnel in the tank farm are responsible for connecting the pipelines and operating the valves ； 2) The discharge conduit must be properly supported and fixed; the connection between the discharge conduit and the valve should be secure. The valve should be opened gradually, and if there is any leakage, it must be resolved before discharge can resume ； 3) The unloading speed of flammable and explosive materials must not be too fast, and static electricity discharge facilities must be available ； Once the liquid level in the storage tank reaches the safe level, forced discharge into the tank is prohibited ； 4) Throughout the unloading process, the driver and the escort are not allowed to leave their posts without permission; they are also prohibited from smoking, drinking, sleeping, or chatting in the cab. The escort must remain on site throughout to ensure safety supervision ； 5) Stop the unloading of flammable and explosive materials in the event of lightning strikes, storms, or fires in the vicinity ； 6) The material inside the tank truck must be completely unloaded, after which the valves should be closed, and the unloading ducts and support frames should be stored away ； 7) It is strictly prohibited to clean and handle residual hazardous materials in the production facility area or at the unloading platforms; it is also not allowed to use the fire-fighting water or production water available in those areas to wash vehicles ； 8) After unloading is complete, the tank truck should immediately leave the unloading platform.

1. Select a shielded pump (1) that is fully enclosed. There are no dynamic seals in the structure; only static seals are present at the pump’s casing, which enables complete leak prevention. This makes it particularly suitable for transporting flammable, explosive, valuable liquids, as well as toxic, corrosive, and radioactive liquids. (2) High safety. Both the rotor and the stator are equipped with shielding sleeves to prevent them from coming into contact with the material; even if these shielding sleeves are damaged, there is no risk of external leakage. (3) Compact structure with low land occupation. The pump and motor are integrated; no centering is required for disassembly or assembly. It has low requirements for the base and foundation, requires little routine maintenance, and results in low maintenance costs. (4) It operates smoothly, with low noise, and requires no lubricant. Since there are no rolling bearings or motor fans, no lubricant is required, and it produces low noise. (5) Wide range of applications. It can meet the requirements for various operating conditions such as high temperature, high pressure, low temperature, and high melting point. 2. Use a diaphragm pump for transportation. In flammable and explosive environments, diaphragm pumps are reliable and cost-effective, because: first, no sparks can be generated once grounding is in place ； Second, no heat is generated during operation, so the machine does not overheat ； Third, the fluid does not overheat because diaphragm pumps cause minimal agitation of the fluid. 3. Use a magnetic pump; a magnetic pump consists of three components: the pump itself, the magnetic drive unit, and the motor. The key component, the magnetic drive, consists of an outer magnetic rotor, an inner magnetic rotor, and a non-magnetic isolation sleeve. When the electric motor drives the external magnetic rotor to rotate, the magnetic field can penetrate the air gap and non-magnetic materials, causing the internal magnetic rotor connected to the impeller to rotate synchronously. This enables contactless transmission of power, transforming dynamic sealing into static sealing. Since the pump shaft and internal magnetic rotor are completely enclosed by the pump body and isolation sleeve, the problems of leakage are completely resolved. This eliminates the safety risks associated with the leakage of flammable, explosive, toxic, and harmful substances through the pump seals in the oil refining and chemical industry, thereby ensuring the physical and mental health of workers as well as safe production. 4. Use siphoning or gravity flow. 5. Strictly manage the site by designating restricted areas; those entering these areas must wear anti-static protective equipment, and vehicles entering the site must be equipped with flame arresters, etc. This post was last edited by *ooma on 2009-4-16 at 10:44.]