Each air compressor has its own performance curve. There is a flying point at a certain speed, that is, the minimum flow point under a certain pressure. If the flow rate is constant, the speed increases, and after reaching a certain value, the flying point is reached. The air machine will fly. In actual operation, if the working conditions reach the above conditions, flying will occur. There are mainly the following situations in the operation. The pressure of the steam compressor rises abruptly. At this time, the compressor speed is constant, and the flow rate must drop, reaching the flying point and flying. The speed rises and the flow rises to the flying point and then flies. The population flow of the air compressor suddenly drops, the rotation speed does not change, and the outlet pressure rises to reach the flying point and then flies. The gas composition becomes lighter and the compressor also flies when it does not reach the rated outlet pressure. Due to equipment failure, such as the air compressor outlet check valve stuck the speed control system failure. The temperature of the second section of the air compressor is too high or too low, causing the air compressor to change its work to cause flying. A method of overcoming flying in production practice. The anti-flying control of the catalytic cracking rich gas compressor generally adopts single-parameter adjustment, that is, the minimum flow value of the specified compressor is used as the minimum flow rate of the protected unit. If the minimum flow rate of the compressor is lower than this value, the anti-flying valve is opened. Increase the anti-flying momentum to ensure that the compressor population flow is greater than the minimum flow at the flying point. In daily operation, first, the pressure at the outlet of the air compressor, that is, the pressure of the reabsorption tower in the absorption stabilization system should be controlled stably, and should not be suddenly raised. For the air compressor population flow should be kept constant, pay attention to adjust the anti-flying momentum, if you find that the amount of rich gas is reduced or the outlet pressure rises, you should immediately contact the relevant post to find out the reasons to take appropriate measures to eliminate the fault. The sudden rise of the pressure at the outlet of the air press is usually caused by the loss of control of the reabsorption tower and the failure of the anti-flying control. At this time, the re-absorption tower pressure should be immediately balanced to handle the anti-flying regulating valve, and if necessary, the torch is opened. The power source of the air compressor is unstable, causing the speed of the air compressor to change drastically, and the population flow rate is high and low. When the flow reaches the flying point, it flies. If steam is used as the power, you should immediately contact the relevant post to balance the steam pressure. If you use other power sources, you should do the relevant treatment immediately. The flying caused by equipment failure, such as the exit check valve stuck to the valve plate of the population valve, etc., should immediately find out the reasons for handling, and if necessary, stop. The composition of the rich gas changes, especially the molecular weight becomes small. For example, if the temperature of the oil and gas heat exchanger is too low or the hydrogen molecules in the rich gas are too much, and the molecular weight is much lower than the design parameters of the air compressor, the number of the air compressor is certain. The outlet exhaust gas is limited to reach the rated pressure of the outlet. At this time, when the absorption tower maintains the normal pressure, the rich gas can not be discharged. At this time, the air compressor will also fly, and the measures taken are to improve the oil and gas heat exchanger. The temperature increases the molecular weight of the rich gas or lowers the pressure of the reabsorption tower to make the compressor discharge normally. It is also possible to open the outlet flare valve first in an emergency, so that the outlet force of the air compressor is reduced to ensure the normal displacement of the air compressor to control the pressure of the anti-resorption system, and then further adjust the absorption and desorption tower to re-absorb the tower operating conditions and the air pressure machine. Operating conditions. Another emergency measure is to place the torch at the inlet of the air compressor, stop the air compressor removal system, and then adjust the operating system before putting it into operation. Rich gas with oil, rich gas with oil is usually caused by the liquid level of the oil and gas separator in the day is too high or the population temperature is too high. In this case, the measures taken are to reduce the liquid level of the population oil separator or reduce the population temperature. . At the same time strengthen the body and population condensing. The inlet temperature of the second section of the air compressor is too high or too low, which causes the work of the second stage of the air compressor to change, which causes the speed of the air compressor to fluctuate rapidly, and the population flow changes accordingly. When the flying point is reached, the unit flies. The measures taken were to adjust the temperature and pressure flow of the cooling water of the air cooler intercooler in time to restore the temperature of the second section to normal. In short, to prevent the air machine flying is the key to ensure the smooth operation of the unit, only to overcome the flying can make the unit run smoothly for a long period of time. In the actual operation, there are many factors that affect the smooth operation of the air compressor. It must be carefully analyzed, and the specific situation should be dealt with specifically to ensure the long-term operation of the whole device. Nylon Slider,Nylon Block,Block,Slider Guangzhou One-Stop Engineering Plastics Industries (group) Co., Ltd , http://www.onestopmould.com
Method of overcoming the flying of a pneumatic machine