Vacuum Belt Filter Application in Gypsum Dehydration

Vaccum belt filter is one of the solid separation equipment widely used in Gypsum production, it can work 24 hours without stop, and has the advantages of large processing capability. Industrial product gypsum is generally discharged by wet method, and the material contains impurities, and water-soluble impurities can be removed by washing and filtering. The flue gas desulfurization gypsum technology has corresponding index requirements for the content of water-soluble magnesium oxide, water-soluble sodium oxide, and chloride ions.

Therefore, washing and filtering equipment must first meet the effect of removing impurities.At the same time, the energy consumption and water consumption of the process and the moisture content of the obtained raw materials must be considered. A vacuum belt filter press can do just that.

The vacuum belt filter is used as a high-efficiency filtration solid-liquid separation equipment. The equipment adopts a fixed vacuum box, and the tape slides on the vacuum box. The structure of the motion seal is formed between the vacuum box and the tape, and the solid-liquid separation is realized with the vacuum negative pressure as the driving force.

Structurally, the filter section is arranged along the horizontal length direction and continuously and automatically completes the process operations such as feeding, filtering, filter cake washing, drying, slag unloading, and filter cloth regeneration.

Vacuum belt filter advantages in gypsum dehydration:

The belt vacuum filter is a continuous production equipment with a large production capacity, flexible operation, and simple maintenance. It has been widely used in the industrial by-product gypsum resource utilization industry.

At the same time, it also has some disadvantages:

There are defects in the operation of the vacuum belt dehydrator, insufficient suction capacity of the vacuum pump, and inadequate adjustment and maintenance of the vacuum belt dehydrator. The gypsum slurry flows into the vacuum belt dehydrator through the underflow of the cyclone, and then the water is separated by the vacuum pump to form gypsum. During this process, if the vacuum system leaks, the filter cloth will be blocked, and if the vacuum pump output does not meet the requirements, the attached gypsum water will be affected.

The following measures can solve these problems:

Rinse filter cloth

The vacuum belt conveyor is essential equipment for gypsum dehydration, and the dehydration effect is closely related to the properties of the slurry and the cleanliness of the filter cloth. Therefore, the normal flushing of the filter cloth should be strictly controlled to ensure the normal water permeability of the filter cloth at any time.

Control the vacuum degree of the belt conveyor

The vacuum change when the belt conveyor is running directly reflects the effect of gypsum dehydration. Especially when the vacuum exceeds -50 000 Pa, the cause of the vacuum rise should be checked and adjusted in time, and sampling and analysis of the quality of the gypsum should be carried out at the same time.

Vacuum Belt Filter Application in Gypsum Dehydration