Disc type filtration system

Abstract

The invention belongs to the field of an ultra-fine solid granule dehydration technology and especially relates to a disc type filtration system. The system is characterized by comprising a filtrationworkshop, a gas supply workshop, a gas distribution subsystem arranged in the filtration workshop and the gas supply workshop, a pulp distributer arranged on a stand I of the filtration workshop, a filtrate gathering pump disposed on a stand III below the filtration workshop ground, a discharge belt conveyor arranged on the terrace of the filtration workshop, and a forced gas-liquid separation subsystem arranged inside the gas distribution subsystem. After a gas-liquid mixture pumped out of a filter enters a tank of the forced gas-liquid separation system, the liquid is condensed down along baffles when flowing through a baffle group, thereby achieving gas-liquid separation; as the baffle group adopts a herringbone welding mode, the retention time of the mixture on the baffles is greatlyincreased, the gas-liquid separation effect is greatly optimized, the content of water in the gas discharged out of the tank after the separation is lower than 1%, and separation of a filtrate and airwhich are pumped out of the filter unit is realized.

Description

technical field [0001] The invention belongs to the technical field of dehydration of fine-grained solid bulk materials, and in particular relates to a disc filter system. Background technique [0002] Filtration operation is the most commonly used dehydration equipment for terminal dehydration of fine-grained ore concentrate or tailings in the mineral processing industry. Due to its small footprint, large processing capacity, and low equipment price, the disc filter occupies an overwhelming majority in the dehydration operation of the mineral processing plant. part of the market share. The current disc filter generally uses a water ring vacuum pump to complete its liquid suction and drying operations, and uses low-pressure air from a blower to complete the cake unloading work. In the current disc filtration operation, a gas-liquid separator needs to be installed between the filter and the vacuum pump to separate the filtrate from the air. At present, the gas-liquid separa...

AI Technical Summary

Problems solved by technology

At present, the gas-liquid separator generally uses a gravity drainage tank in the current mineral processing plant. This kind of equipment needs to set the gravity drainage tank and filter on a platform above 10 meters high to overcome the influence of atmospheric pressure on the discharge of the filtrate and prevent the filtrate from The air outlet of the gravity drainage tank enters the vacuum pump to pollute the working fluid of the vacuum pump and cause damage to the vacuum pump

Therefore, in the current disc filtration operation, the platform elevations of gravity drainage tanks, filters, and ore slurry distributors are generally 10m, 12.5m, and 16-18m. Therefore, the use of gravity drainage tanks not only greatly improves the factory building The height increases the infrastructure investment, and increases the height of the filter feeding mine, which greatly improves the energy consumption required for the filter feeding mine

Moreover, gravity drainage is adopted. In order to prevent the filtrate from flowing back, a water-sealed box must be installed under the filtrate tank. When the filter cloth is damaged, fine-grained minerals enter the water-sealed box with the filtrate, which is easy to cause blockage, resulting in the final filtrate entering the vacuum pump with the air. , resulting in changes in the water quality of the vacuum pump working fluid and damage to the vacuum pump

[0003] In addition, the current filter minerals in some mines often have fine particle size and certain viscosity, such as the filtration of red mud. If these minerals are unloaded with low-pressure air, the cake is often not completely unloaded due to the low pressure, which eventually causes filter cloth. Blockage, which reduces the processing capacity of the filter and increases the moisture content of the filtered product

Moreover, in the current filtration system, most of the filters are equipped with a vacuum pump and a blower. When multiple filters are required, the number of attached vacuum pumps and blowers is too large, and the specifications are too small. This configuration method does not meet the requirements of large-scale equipment. There are often too many ancillary equipment, connecting pipes and valves, high investment and complicated management

Furthermore, most of the current filtration systems arrange vacuum pumps and blowers on the floor of the filtration workshop. These devices are very noisy, which often causes the overall noise of the filtration workshop to be too high, which seriously affects the physical and mental health of the workers.

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