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Accident causes and countermeasures of steam injector
Release time:
2022-02-17
After the steam ejector forms a hollow area, the quantity of condensed water can be adjusted by adjusting the valve at the water inlet. The design value of the drainage temperature that reaches the design value can be used as a parameter. Too large or too small flow rate will affect the performance of the steam ejector. If the valve is opened too large, it may cause too large flow rate and flow of air flow. If the valve is opened too small, the nozzle may be blocked, The water flow may be too small.
The steam ejector is an equipment that is not prone to failure. However, because its internal structure is relatively simple, the pump body cannot move, and only the fluid moves. Therefore, it is difficult to find the cause of the failure. Once the steam ejector fails, it is often difficult to repair, so people often dismantle and inspect the steam ejector regularly. However, as long as you have a deep understanding of the characteristics of the steam ejector and its jet pump, you can easily find out the problem.
Generally speaking, if the steam pressure of the steam injector is too high during operation, the performance of the pump will deteriorate, and some working steam will be wasted. When the distance between the steam pump gas distribution and the steam pump is relatively long, for example, if the steam pressure of the steam injector is greater than 30 meters, it is often higher than the set parameters, so as to ensure that the nozzle inlet pressure of the equipment can reach the design value.
Before the pump opening of the steam ejector is opened, the water contained in the steam should be removed as much as possible to ensure the quality of the working steam ejector, because some wet steam is easy to cause deterioration of the equipment performance, and cause corrosion and wear of the nozzle and pump casing.
The nozzle of the steam injector is very easy to be blocked, so before the test run, the pipeline can be purged with compressed air and steam to prevent some impurities from blocking the channel, and then the nozzle can be connected. When its wear value has exceeded 10% of the designed value, the nozzle should be replaced as much as possible, Whether the nozzle is blocked can be judged by observing its sound temperature change or vacuum pressure.
In the steam ejector, if a large amount of dust is inhaled into the equipment during the oxygen blowing process, it may affect the service life of the equipment in serious cases, so it is necessary to regularly clean the dust according to the intensity of the operation. The leakage of the vacuum system should be checked every six months. The vacuum measuring pipeline can be used as the vacuum pressure at the vacuum pump site, and introduced into the control room for measurement to ensure the measured value, The leakage phenomenon is not allowed for the pipeline to be measured accurately enough. Because the connecting pipe of the steam ejector assembly will be scoured by high-speed air flow for a long time, it is very easy to wear. Therefore, it is necessary to measure the pipe wall thickness of the equipment regularly. Generally, it can be measured once every two years. If the shell is found to be thin or deformed or damaged.
After the steam ejector forms a hollow area, the quantity of condensed water can be adjusted by adjusting the valve at the water inlet. The design value of the drainage temperature that reaches the design value can be used as a parameter. Too large or too small flow rate will affect the performance of the steam ejector. If the valve is opened too large, it may cause too large flow rate and flow of air flow. If the valve is opened too small, the nozzle may be blocked, The water flow may be too small.
