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Slurry Recirculation Pump

What is slurry recirculation pump?

Slurry recirculation pump is one of the most important equipment in the desulfurization system. It is installed next to the absorption tower. Its main function is to continuously circulate the slurry in the absorption tower so that the sulfur dioxide in the flue gas can be completely absorbed. It is a single-stage single suction horizontal centrifugal pump.

 

Slurry Recirculation Pump

 

Working principle of slurry recirculation pump

The centrifugal force generated when the impeller rotates at high speed driven by the motor enables the fluid to obtain energy, that is, after the fluid passes through the impeller, the pressure energy and kinetic energy can be improved, so that it can be transported to a high place or far away. At the same time, negative pressure is formed at the inlet of the pump, and the medium will be automatically sucked into the impeller for supplement under the action of atmospheric pressure. Due to the continuous work of the centrifugal pump, the medium is sucked in and out, forming a continuous flow and constantly conveying the medium out.

 

Precautions for selection of slurry recirculation pump

1. Material

The commonly used desulfurization materials of our company are self-developed GLH-5/GLH-6/GLH-61 high chromium corrosion-resistant materials.

GLH-5 material is mainly used in impeller, inlet short pipe, liner plates.

GLH-5 material is mainly used in volute casing.

GLH-61 material is mainly used in the desulfurization condition of sintering machine in steel plant and ammonia desulfurization process.

2. The transmission mode is divided into direct connection and reducer transmission.

3. Some manufacturers will appropriately reduce the service life of the pump by increasing the speed of the pump, so as to reduce the equipment cost and occupy the market. However, in the case of a certain flow and head, the design speed of the pump will be limited by cavitation performance, service life and so on, can not be unlimited improved. At present, when the flow of slurry recirculation pump is below 4000 m3/h, the pump speed is 980 / min, and 730r/min motor will be selected for slurry recirculation pump with flow between 4000-6000 m3/h. If the flow is more than 6000m3/h, the speed of 590r/min and below shall be selected. Through the market practice test, it can meet the on-site use requirements.

 

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