The screw air compressor itself has a water removal device, generally at the exit of the machine, which can initially remove a part of the water. The water removal, degreasing and dust removal filters in the post-treatment equipment can remove a part of the water, but most of the water is mainly It is removed by a drying machine dryer, and the compressed air passing through it is dried and then sent to the gas line. Many enterprise users use a micro-heat-regeneration double-tower adsorption dryer, but the use of such a dryer does not guarantee that the compressed air will no longer be analyzed. The following is a combination of some practical conditions to analyze the various reasons and solutions for the incomplete water removal of compressed air after drying.

(1) The cooling fins of the air compressor are blocked by dust, etc. The cooling air is not well cooled, and the pressure dew point is increased, which will increase the difficulty of removing water from the after-treatment equipment. Especially in spring, the air compressor cooler is often Catkins are clogged.

Solution: Install the filter sponge on the window of the air compressor station, and often blow the ash to ensure that the compressed air is cooled well; ensure that the water is normal.

(2) The water removal device of the screw air compressor - the steam separator is faulty. If the air compressor uses a cyclone separator, a spiral baffle is added inside the cyclone to enhance the separation effect (and also increase the pressure drop). A disadvantage of such a separator is that its separation efficiency is higher at its rated throughput, and once it deviates from its separation efficiency, it is relatively poor, resulting in an increase in the dew point.

Solution: Check the gas-water separator regularly, and handle the clogging and other faults in time. If the gas-water separator is not drained in the summer when the air humidity is high, it should be checked immediately.

(3) The amount of compressed air in the process is large, which is beyond the design range. The pressure difference between the compressed air and the user end is large, resulting in high airflow speed, short contact time between compressed air and adsorbent, and uneven distribution in the dryer. In the middle flow concentration, the adsorbent in the middle part is supersaturated too quickly, and the saturated adsorbent can not effectively adsorb the moisture in the compressed air, and the compressed air entrains a large amount of water to pass through the center, resulting in "tunneling effect", resulting in use There is a lot of liquid water at the gas end. In addition, the compressed air is quickly dispersed to the low-pressure end during the conveying process, and the pressure is rapidly reduced, and the temperature is lowered greatly. Below the pressure dew point, the water vapor is precipitated under supersaturation, and the winter will rapidly The inner wall of the conveying pipe is solidified and hanged, and the ice is thicker and thicker. Finally, the pipe may be completely blocked.

Solution: Increase the flow of compressed air. The excess instrument wind can be added to the process wind, the instrument wind is connected to the front end of the process air dryer, and the valve is used to solve the problem of insufficient air supply for the compressed air of the process. At the same time, the compressed air is also solved in the adsorption tower of the dryer. The problem of "tunneling" arises.

(4) The adsorption material used in the adsorption dryer is activated alumina, which is not tightly packed and will rub against each other under the impact of strong compressed air, causing powdering. The pulverization of the adsorbent material will make the adsorbent void become larger and larger. A large amount of compressed air passes through the gap and is not effectively treated, which eventually leads to the failure of the dryer. This problem is manifested in the scene as a large amount of liquid water and slurry in the dust filter.

Solution: Fill the activated alumina as tightly as possible, and check and replenish it after using it for a period of time.

(5) Compressed air with oil can cause the activated alumina oil to poison and fail. The super coolant used in the screw air compressor has high thermal conductivity and is used to cool the compressed air. However, the separation from the compressed air is incomplete, and the compressed air sent to the air compressor will be oiled. The oil in the compressed air will be attached to the active air. The surface of the alumina ceramic ball blocks the capillary pores of the activated alumina, causing the activated alumina to lose its adsorption capacity and causing oil poisoning and losing the function of adsorbing moisture.

Solution: Replace the oil separator core and the rear degreasing filter on time to ensure the oil and gas separation of the air compressor is complete, and the rear degreasing filter is well degreased. In addition, the super coolant in the unit must not exceed the amount.

(6) The air humidity changes greatly, and the drainage frequency and drainage time of each timing drain valve are not adjusted in time, so that more and more water can be accumulated in each filter, and the accumulated water can be brought into the compressed air again.

Solution: The drainage frequency and time of the timing drain valve can be set according to the air humidity and experience. If the air humidity is high, the frequency of drainage should be increased, and the drainage time should be increased. The adjustment standard is to observe that every time the drainage is drained, the accumulated water can be drained without discharging compressed air. In addition, the conveying pipeline is insulated, steam is accompanied by heat; the drain valve is added at the low point, and the inspection and drainage are carried out regularly. This measure can prevent the winter freezing pipe and remove part of the moisture in the compressed air to reduce the compressed air. User impact. By analyzing the cause of the compressed air with water, and taking the above corresponding measures to solve.