In the steam ZYB-B high-pressure residual oil pump, the throat diameter of the nozzle is small. Once the foreign matter in the steam pipe enters the nozzle with the steam, the nozzle is blocked and the ZYB-B high-pressure residual oil pump is invalidated. This is usually the case when new equipment is just in operation and the steam line is not clean enough. ZYB-B high pressure residual oil pump failure and failure type of several types of analysis In the steam ZYB-B high pressure residual oil pump, the throat diameter of the nozzle is small, once the foreign matter in the steam pipeline enters the nozzle with steam, it will cause nozzle blockage to make ZYB- B high pressure residual oil pump failed. This is usually the case when new equipment is just in operation and the steam line is not clean enough.
Symptom: After the pump is added to the system, the vacuum of the system does not rise, and the Botaibang does not fall.
The first-stage pump, the second-stage pump, and the third-stage pump have a deeper suction chamber, so there is a gas supply pipe between the steam pipe and the nozzle. The seal between the nozzle and the air supply pipe is generally a rubber asbestos pad. When the seal is broken down by steam, the steam will enter the suction chamber through the gap and become an additional source of air, which will affect the vacuum.
Symptom: When the pump is added to the operation, the vacuum does not rise. Instead, it fell.
The air supply pipe of the first-stage pump suction chamber is insufficient due to the thickness of the pipe wall, and the steam pressure will swell the air supply pipe, and a large amount of steam enters the mixing chamber from the rupture of the air supply pipe, thereby destroying the vacuum degree of the system. In addition to the above factors, there is another possibility in the suction pipe of the suction pump of the 2-stage pump and the 3-stage pump: it is due to the furnace gas particles entrained in the high-speed airflow of the ZYB-B high-pressure residual oil pump of the previous stage, which is impacted for a long time. The air supply pipe of the stage pump makes the wall of the air supply pipe thinner, the strength is reduced, causing cracking, a large amount of steam escapes, and the vacuum degree of the system is destroyed.
Symptom: When the pump is added to the operation, the vacuum is not increased, but it drops sharply.
The first stage pump, the second stage pump and the third stage pump are arranged in a zigzag shape. There is a transition elbow connection between the pump and the pump. There is also a transition elbow connection between the 3-stage pump and the main condenser. After these elbows are impacted by the particles in the furnace gas for a long time, the wall thickness of the steel plate at the impact site will gradually decrease. Thin, and finally penetrated, the atmosphere enters the vacuum system from the breakdown site, which affects the system vacuum.
Symptoms: When the system vacuum is between 266 and 399 Pa, and all other external leaks are excluded, the above parts should be inspected.
The same is true for the same vertical 4-stage pump, 5-stage pump and 6-stage pump. The transition elbow between the pump and the condenser should be checked.
In the pumping process of the ZYB-B high-pressure residual oil pump, the furnace gas enters the pump body from the suction chamber of the first-stage pump, and then enters the main condenser through the 2-stage pump and the 3-stage pump. However, some of the particles in the furnace gas will be deposited in the suction chambers of the 2-stage pump and the 3-stage pump. Among them, the accumulation of the indoor furnace gas particles in the 3-stage pump is the most serious. These particles are under the baking action of high-temperature steam. It will become a very hard deposit, block the gas passage of the pump, and reduce the pumping capacity of the pump. Therefore, the suction chambers of the 2-stage pump and the 3-stage pump need to be cleaned regularly.
Symptoms: The time to pump up to 67Pa is significantly increased.
There is dust accumulation inside the diffuser of the 2-stage pump and the 3-stage pump. When the ash inside the diffuser reaches a certain thickness, the axis of the diffuser is changed. At this time, the high-speed steam sprayed from the nozzle will cause a turbulent flow inside the diffuser, thereby causing the pump to work. The characteristics are significantly reduced, affecting the pumping performance of the pump.
Symptoms: The degree of vacuum that can be achieved after the stage is added to the work is significantly lower than the vacuum that can be achieved when it is first put into production.
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