Device and process for producing power plant fuel by using coal slurry in coal preparation plant

Abstract

The invention belongs to the technical field of coal slime slurry treatment and coal slime comprehensive utilization in coal preparation plants, and in particular relates to a device and a process for producing power plant fuel with coal slime slurry in coal preparation plants. This kind of device for producing power plant fuel with coal slurry in coal preparation plant includes coal slurry buffer tank, flocculant tank, decanter centrifugal dryer, gas-solid separator, power plant boiler; coal slime buffer tank and decanter centrifuge The feed port of the integrated drying machine is connected, the gas mixed dry material outlet on the horizontal screw centrifugal drying integrated machine is connected with the gas-solid separator, the gas outlet at the upper end of the gas-solid separator is connected with the feedback gas inlet of the power plant boiler, the shaft flue is connected with the horizontal The high-temperature gas inlet on the screw centrifugal drying integrated machine is connected, and the flocculant tank is connected with the feeding pipeline. The device is an integrated system for directly producing low-moisture high-quality power plant fuel; the production process is simplified, and equipment and system investment and production and operation costs are reduced.

Description

technical field [0001] The invention belongs to the technical field of coal slime slurry treatment and coal slime comprehensive utilization in coal preparation plants, and in particular relates to a device and a process for producing power plant fuel with coal slime slurry in coal preparation plants. Background technique [0002] At present, the coal preparation methods used in large-scale coal preparation plants are mainly dense medium, jigging, and flotation. Now the treatment and reuse of coal slime is a key content of mine wastewater treatment for special research. The more commonly used methods in coal preparation plants The dehydration recovery equipment for fine particle coal slime is mainly a filter press, and the moisture content of the produced coal slime is generally 23-28%. The production efficiency of the filter press is low, and the output coal slime has a high moisture content. There is also a horizontal screw centrifuge used to treat the coal slurry in the co...

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Problems solved by technology

It can be seen that in the prior art, the process steps for drying coal slime are complicated, the process is cumbersome, the production process cycle is long, the cost is high, the energy consumption is large, and the dust pollution is serious.

[0004] To sum up, in the prior art, there are cumbersome and complicated procedures for coal slime slurry treatment and coal slime drying process in coal preparation plants; many equipments; high failure rate; low degree of automation; large energy consumption; many people; operating costs High; unstable operation, poor effect and many other problems

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