Semicoke grinding system and method

Abstract

The invention discloses a semicoke grinding system and method. The semicoke grinding system comprises a pyrolyzing furnace, a high-temperature speed regulation feeder, a raw coal belt, a speed regulation coal feeder and a pulverizer. The high-temperature speed regulation feeder is arranged between the pulverizer and the pyrolyzing furnace. The speed regulation coal feeder is arranged between the pulverizer and the raw coal belt. The pulverizer comprises bearings and a barrel. The bearings are arranged on two sides of the barrel. The barrel comprises a feeding opening, a discharging opening, a housing, a lining plate and an insulating layer. The feeding opening and the discharging opening are respectively formed in two ends of the barrel. The housing is located on the surface layer of the barrel. The lining plate is arranged on the inner side of the housing, and is made of a high temperature resistant material. The insulating layer is arranged between the housing and the lining plate. The semicoke grinding system and method solve the grinding problem of high-temperature semicoke in a high temperature state, the high-temperature semicoke is ground into high-temperature coke powder through high temperature grinding, and high temperature coke powder is directly fed in a boiler for combustion through pneumatic transmission, so that the purpose that the high temperature semicoke is directly pulverized, and then the coal powder is transported for use is achieved.

Description

technical field [0001] The invention belongs to the technical field of coke powder and coal powder combustion power generation, and in particular relates to a semi-coke grinding system and method. Background technique [0002] my country is rich in coal resources, and most of the raw coal is used for direct combustion to generate electricity, except for coking and conversion processing. The direct combustion of coal leads to the fact that the oil and gas resources rich in coal have not been fully refined and utilized, and the thermal efficiency of direct combustion is low, which seriously damages the environment. The pyrolysis of coal is to heat coal under an inert atmosphere to produce semi-coke, gas and tar and other products. These products can be used in stages to fully extract oil and gas resources while improving coal, especially lignite and coal. For the comprehensive utilization efficiency of long-flame coal, the high-temperature semi-coke currently generated needs ...

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Problems solved by technology

[0005] The above-mentioned prior art has the following disadvantages: (1) high-temperature semi-coke needs to be cooled before entering the coal mill for grinding, and the original surface heat is not utilized; (2) high-temperature semi-coke needs to consume a large amount of cooling water during the cooling process, Increase the production cost of semi-coke; (3) The system needs to be equipped with a cold coke machine, which increases the complexity and investment of the system; (4) The structural characteristics of the mill limit the material temperature; (5) Due to the structural characteristics of the cylinder, the material temperature It should not be too high, generally limited to below 400°C. If it exceeds the above range, the temperature of the ball mill body and bearings will rise, which will affect the strength of the cylinder and the safe operation of the bearings; (6) Steel balls and liners inside the mill The contact area determines the production efficiency of the mill, and the contact area is limited by the diameter and length of the ball mill. If the production capacity is increased, the length and diameter of the ball mill need to be increased, which will greatly increase the production cost of the mill.

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