Device for producing power plant fuel by use of coal slime slurry from coal preparation plant and technology thereof

Abstract

The invention belongs to the technical field of coal preparation plant's coal slime slurry processing and slime comprehensive utilization, and specifically relates to a device for producing power plant fuel by the use of coal slime slurry from a coal preparation plant and a technology thereof. The device for producing power plant fuel by the use of coal slime slurry from a coal preparation plant comprises a coal slime slurry buffer pool, a flocculant tank, a horizontal decanter centrifuge drying all-in-one machine, a gas-solid separator and a power plant boiler. The coal slime slurry buffer pool is connected to a feed inlet of the horizontal decanter centrifuge drying all-in-one machine, a gas mixed drier outlet of which is connected to the gas-solid separator. A gas outlet at the upper end of the gas-solid separator is connected to a feedback gas inlet of the power plant boiler. A shaft flue at the upper end of the gas-solid separator is connected to a high temperature gas inlet of the horizontal decanter centrifuge drying all-in-one machine. The flocculant tank is connected to a feed pipe. The device is an integrated system for direct production of low-moisture high-quality power plant fuel. The production flow is simplified; investment in equipment and system is reduced; and production and operational cost is decreased.

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...

AI Technical Summary

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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