Analysis of the hottest air compressor station and

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Analysis on safety technology of air compressor station and nitrogen production

I. unit design

1. In addition to determining the model and number of main machines, the supply scope of supporting auxiliary equipment and accessories, pipelines, pipe valves, control instruments and electrical equipment should also be specified

the noise of the air compressor shall comply with the national standard code for design of noise control in industrial enterprises (GNJ 87-85). For screw air compressors with excessive noise, effective prevention and control measures should be taken to avoid noise pollution

2. the type selection of dryer is determined after technical and economic comparison according to the requirements of air supply system and users for air drying degree and air handling capacity. The instrument air system of the project adopts the heatless regenerative combined dryer. When the air compressor is lubricated with oil, a high-efficiency degreaser must be added in front of the dryer. The temperature of compressed air entering the adsorption dryer shall not exceed 40 ℃

in order to facilitate maintenance and replacement of desiccant, a bypass valve should be installed between the inlet and outlet pipelines of the dryer

3. the buffer tank should be set after the loss surface of the piston air compressor of the buffer tank and air storage tank is 15.6%, and each air compressor should not share the buffer tank. Screw 1. The working environment of spring fatigue testing machine and centrifugal air compressor are generally not equipped with buffer tank

in order to ensure the safe operation of buffer tank and air storage tank, safety valve and pressure gauge with on-site indication should be installed on the tank. For the piston air compressor system, the buffer tank shall be equipped with an air compressor pressure reducing valve. In order to drain the accumulated water in the buffer tank or air storage tank smoothly, a drain pipe should be set at the bottom. In cold seasons, the drain pipe should be equipped with reliable anti freezing measures

4. in order to prevent sundries and a large amount of dust from entering the air compressor, an air filter should be set on the suction pipe of the air filter (unless the air compressor unit has been equipped with a filter). Its filtering area should be compatible with the air compressor equipment that can also work normally within the range of exhaust volume. In order to check the dust accumulation of the air filter, an instrument for measuring its differential pressure should be set. The air filter shall be installed at a place convenient for inspection and maintenance, and platforms and ladders shall be set if necessary

5. Muffler in order to prevent the noise generated during air suction and discharge from exceeding the standard, muffler should be installed at the following positions of the system: ① air compressor suction pipe; ② Regeneration exhaust pipe of adsorption dryer (usually configured in groups by dryers); ③ Inlet of Roots blower of heating regeneration adsorption dryer (usually configured in groups by dryers); ④ Other vent pipes. The form and specification of the silencer shall be compatible with its installation position, air intake or exhaust volume. The installation position of muffler shall be convenient for support

6. When the discharge temperature of the compressed air of the aftercooler compressor exceeds 40 ℃, the aftercooler should be set in front of the degreaser or dryer. Each air compressor should not share an aftercooler. The water condensed in the aftercooler shall be effectively separated and smoothly discharged

7. when the oil content of the compressed air cannot meet the user's requirements, the oil remover needs to be added, but its oil removal efficiency must meet the specified air quality standard. The oil remover should be installed after: ① the aftercooler; ② Before the refrigerated dryer; ③ Before adsorption dryer. To reduce the load of the degreaser and ensure that the adsorbent is not polluted by oil. The temperature of compressed air entering the degreaser should not be higher than 40 ℃. The degreaser shall be able to remove oil stains automatically

8. dust filter and compressed air filter adopt the air system of adsorption dryer. Dust filter should be set at the rear of dryer, and bypass valve should be set between inlet and outlet pipes. The compressed air filter is installed behind the buffer tank (or air storage tank)

II. General requirements for pipeline design

1. The suction pipe of the pipeline air compressor should be set independently, and the height of the suction port depends on the cleanliness of the surrounding air and the user's requirements for air quality. For the single-layer air compression station plant set independently, the air inlet shall be higher than the plant roof, and the air inlet shall be equipped with a rain cover and iron wire to prevent raindrops and sundries from entering the pipe. In order to reduce the suction resistance and avoid pipe vibration, the horizontal length of the suction pipe should be shortened as far as possible and fewer bends should be made

the pipeline from the air compressor to the aftercooler should be easy to disassemble and facilitate the removal of carbon deposits. Thermal compensation shall be considered for the exhaust pipe of the air compressor

the pipeline conveying saturated compressed air should be set up to discharge the oil and water accumulated in the pipeline system

in cold seasons, in order to prevent the water in the pipeline from freezing, the factory air that has not been dried often has no way to lower the low points and dead corners of the hand gas pipeline. The drain pipes of buffer tanks, air storage tanks, aftercoolers and other equipment should be insulated and heat traced

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