What is the information about the gas tank?

The composition of the gas tank

The air storage tank of the air compressor is composed of a head, a cylinder and several nozzles attached to the air storage tank. The head and the cylinder are made of bent plates, including the cylinder, and the tank is connected by a flange. The outer side of the upper oval head is provided with a pressure gauge interface, an air outlet and a safety valve interface which communicate with the tank. The cylinder body has an air storage cavity, and the bottom of the lower head is provided with a drain valve. The outer wall of the lower head is provided with a support; the air storage chamber is provided with a dehydrator, the dehydrator includes a cylindrical cylinder with a conical bottom surface, and a fixed bracket fixedly connected to the cylindrical cylinder is arranged on the inner wall of the lower head. The body is provided with an air intake pipe extending into the air storage cavity and connected to the cylindrical body along the tangential direction of the cylindrical body. The top surface of the cylindrical body is provided with an air guide pipe, and the bottom of the conical bottom surface of the cylindrical body is connected to a water outlet pipe. , the outlet pipe is connected to the drain valve.

Inspection requirements for gas storage tanks

Usually as a simple pressure vessel, the air compressor air storage tank has always been regarded as a relatively safe special equipment, but it also has certain dangers. If there are problems in design, manufacturing quality, installation standards, operation and management, If it does not meet the specified requirements, hidden dangers will be buried, and serious accidents may occur during use, resulting in casualties and equipment damage.

The gas storage tank needs to be reported for installation before installation. After installation, the pressure vessel use certificate and regular inspection shall be carried out according to the requirements of special equipment, and the inspection report shall be obtained after passing the inspection. Periodic inspection shall be carried out according to the pressure level and service life of the gas storage tank, and the gas storage tank that has not passed the regular inspection shall not be used. The volume and pressure of the air storage tank should meet the design standards and cannot be configured casually. One air compressor is equipped with one air storage tank. The air storage tank of the ground air compressor station should be protected from direct sunlight, the air storage tank must have inspection holes, and the grease in the tank should be removed regularly.

Requirements for safety accessories and protective devices of gas storage tanks

1. Safety accessories for gas storage tanks

1) Safety valve

The main function of the safety valve of the air storage tank is to force the discharge when the air compressor fails to automatically release the pressure according to the set pressure and the pressure reaches the relief pressure of the safety valve, so that the pressure of the air storage tank will not rise too high. Therefore, the safety valve should be checked regularly, because the air storage tank is a container used to store compressed air, and it will explode when the pressure and temperature exceed the capacity of the container. The safety valve must be fixed according to the working pressure, and the safety valve is sensitive and reliable, and should be checked regularly. The safety valve shall not be unpacked by itself after the inspection during operation, and the manual and automatic start-up tests of the safety valve shall be carried out regularly to verify the reliability of the safety valve. Common failures of safety valves include reaching the opening pressure but not opening, and failing to reach the opening pressure but automatically opening.

2) Gas tank pressure gauge

The main function of the pressure gauge of the gas storage tank is to display the indicator gauge of the medium pressure in the tank. The pressure gauge should be calibrated once a year and has an inspection certificate. If the pressure gauge is found damaged during use, it should be replaced in time to ensure the accuracy of the pressure gauge indication.

2. Gas tank protection device

1) The gas storage tank must be equipped with an over-temperature protection device. The temperature in the gas storage tank should be kept below 120 °C during operation, and the power supply can be automatically cut off and an alarm will be issued when the temperature is exceeded.

2) A pressure relief valve must be installed on the outlet pipeline of the air storage tank, the diameter of which should not be smaller than the diameter of the air duct, and the relief pressure should be 1.25~1.4 times the maximum working pressure of the air compressor.

3) Due to the high temperature of the compressed air, it will gradually cool down after passing through the air storage tank, and the moisture in the air will also condense out, so the drain valve at the bottom of the air storage tank should be opened regularly to discharge this part of the moisture, otherwise, It will not only affect the quality of compressed air but also cause the air storage tank to rust, so it is necessary to install a drainage device for the air storage tank.

The drainage device is equipped with a manual switch and a solenoid valve switch. Under normal circumstances, manual drainage is not required; if the solenoid valve fails, the manual switch can also be manually turned on for drainage, which makes the entire air compressor air storage tank safe, efficient, and efficient. High reliability and long service life.

Requirements for safe operation of gas storage tanks

1) Establish and improve relevant rules and regulations, including operating procedures, maintenance systems, operation records, inspection records, and protection test records. The operating procedures should be strictly followed, so that the working pressure of the gas storage tank should not be higher than the specified pressure, and inspections should be made on time, and the operation records should be filled in in time.

2) Before operation, check whether the surface of the gas storage tank is damaged, whether the pipeline connection is airtight, whether the pressure gauge is normal, whether the pressure gauge is within the normal pressure range, the exhaust valve should be opened slowly, and the water in the tank should be discharged. Open the intake valve again.

3) Check the pipeline and tank for leakage in time. If any problem is found, it must be shut down to deal with it, and it must not be operated with illness.

4) Carry out equipment inspection in time for daily work, and check the indicated value of the pressure gauge of the gas storage tank. If the working pressure is higher than the set pressure of the safety valve, the safety valve should be opened automatically, otherwise, the air intake should be stopped immediately, and the operation should be stopped. If there is air leakage, repair it in time, and pay attention to whether the safety valve and pressure gauge are normal.

5) When the gas storage tank is in use, check whether the automatic drain valve is installed on the drain valve at the bottom of the gas storage tank. If it is installed, regularly pay attention to whether the automatic drain valve drains normally, otherwise the moisture in the air will flow to the production line due to too much. Affect product quality; if not installed, it needs to manually open the valve to drain at least once per shift.

6) The gas storage tank is a high-pressure container, and flammable and explosive gases are not allowed near it. The tank body should be kept clean, dry, and ventilated, and it is strictly forbidden to stack debris around it. 

7) It is strictly forbidden to collide and knock the tank with metal objects during operation. There is no serious corrosion of the gas storage tank, the support is stable, there is no crack in the welding place, and there is no violent shaking during operation.

Analysis and Maintenance of Explosion Causes of Gas Storage Tanks

1. The reason for the explosion of the gas storage tank

The gas pressure in the gas storage tank rises sharply. If the strength limit of the tank wall thickness is exceeded, the safety valve will fail and the gas storage tank will run over pressure. Due to carbon deposition in the gas storage tank, sparks generated by mechanical impact of hard particles during movement and electrostatic discharge, etc., due to poor cooling, a large amount of oil dirt and carbides are accumulated in the gas storage tank, and they are not cleaned in time, resulting in carbon deposition in the tank Combustion, the gas storage tank is prone to combustion and explosion.

2. Maintenance of gas storage tank

1) The maintenance of the gas storage tank is very important. Check the connection screws of the pipeline every day for looseness and failure. Apply butter to the screws to prevent the screws from being corroded and inconvenient to disassemble and inspect the tank body. The tank body should be kept clean and free of rust. Anti-rust treatment, when inspecting and repairing, care should be taken to avoid sawdust, iron filings, wipes, etc. from falling into the air storage tank and conduit. If the gas storage tank is not used for a long time, the water in the tank should be discharged and the tank should be kept dry.

2) The appearance of the gas storage tank should be bright in color, uniform in surface treatment, smooth in the welds and clear in lines, and must have an equipment nameplate. The medium, supervisory inspection unit, manufacturing unit, and the nameplate of the gas storage tank must have the product's steel stamp number. According to relevant national regulations, each gas storage tank must be equipped with a quality assurance certificate. Establish one machine and one file of gas storage tank equipment, including gas storage tank inspection report, use certificate, relevant technical information, rules and regulations, drawings, etc. Operators must be certified to work to achieve remote monitoring and unattended operation. Special personnel must conduct regular inspections and solve problems in a timely manner.