Problems with high-pressure ash water pumps
Thread Content
May I ask whether it is possible to omit the inlet filter in the high-pressure ash water pump used in Texaco’s water-coal slurry gasification? If a filter must be used, what would be an appropriate pore size for it?
An inlet filter must be installed to prevent damage to the impeller. The equipment diagram for the filter mesh pore size includes explanations
It’s best to add it in the early stage; it can be removed once stability is achieved… As long as the water quality is well controlled, there will be no problems.
It must be added; the water for the high-pressure ash water pump comes from the deaerator. Sometimes, the packing rings in the deaerator can end up in the pump casing through the pipelines, thereby damaging the pump’s impeller!
It’s necessary to add it; gasification produces very dirty material with a high ash content. Every time we clean the filter screens, we find a lot of ash fragments. If this additive isn’t used, it will affect the operation of the pump’s impeller. Moreover, the water from the ash pump is sent to the carbon scrubber tower, and a high amount of ash will increase the pressure in that system, increasing the risk of blockages.
Filters installed at the pump inlet are primarily used to protect the pump, especially critical pumps which need to be well protected; therefore, the inlet filter cannot be removed. As for the size of the filter screen, it needs to be determined based on factors such as the diameter of the inlet pipe, the quality of the water, and the maximum flow rate of the pump. The total area of the pores in the lowest filter screen must not be less than the cross-sectional area of the pump inlet pipe. You can also provide the relevant parameters to the filter manufacturer to help with the calculation and production.
It’s better to add them; when the water quality in the system is poor, debris will accumulate at the pump’s inlet, which can cause significant damage to the pump. The filters we use have a mesh size of 10 microns, which allows them to filter out larger particles of debris, so smaller particles don’t have as much of an impact on the pump ! ! !