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Desulfurization process for burning of mixing coal slime mixed with dolomite

A desulfurization process and dolomite technology, applied in the separation of dispersed particles, chemical instruments and methods, separation methods, etc., can solve the problems of affecting the load capacity of the boiler, high desulfurization cost, unstable desulfurization index, etc. The effect of reducing slag heat loss and improving energy efficiency

Active Publication Date: 2011-07-20
JINAN QIQUAN THERMOELECTRICITY
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of high desulfurization cost of circulating fluidized bed, unstable desulfurization index, affecting boiler load capacity, etc., to provide a low cost, easy to use, can effectively improve desulfurization rate, ensure boiler stability and other advantages. Coal Slime Mixed Burning Dolomite Desulfurization Process

Method used

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] A coal slime mixed burning dolomite desulfurization process, its steps are:

[0024] 1) mixing coal slime and dolomite into coal blended coal slime according to the weight ratio of 100:8-12 parts;

[0025] 2) Then, according to the ratio of coal slime and coal mixed with coal slime mass percentage, coal slime is greater than 60% in the coal bunker and then sent to the coal feeder;

[0026] 3) The coal feeder sends the mixed coal slime and coal blended coal slime into the furnace for combustion;

[0027] 4) The burned coal slag is recovered and can be used to produce building materials; the burned flue gas is recovered by electric dust removal and used as cement additives, and the flue gas after dust removal is desulfurized and discharged after the furnace.

[0028] In the step 1), the particle size of dolomite is 5-8 mm.

[0029] In the step 3...

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Abstract

The invention discloses a desulfurization process for burning of coal slime mixed with dolomite. The process solves the problems that a present circulating fluidize beds has high desulfurization cost, unstable desulfurization index, influencing the load capacity of boilers, and the like, and has the advantages of low cost, convenient use, effective improvement of desulfurization efficiency, guarantee of boiler stability, and the like. The process comprises the following steps: (1) mixing coal slime and dolomite into mixed coal slime according to the weight part proportion of 100:(8-12) parts;(2) then uniformly mixing the coal slime and the mixed coal slime in a coal cabin in a mode that the mass percent of the coal slime is larger than 60 percent and then sending an obtained mixture intoa coal feeder; (3) sending the mixture of the coal slime and the mixed coal slime into a hearth by the coal feeder for burning; and (4) recovering burnt coal slag. Flue gas after burning is treated by electric precipitation, then stove ashes are recovered, and the flue gas treated by the electric precipitation is desulfurized after coming out of the hearth and exhausted.

Description

technical field [0001] The invention relates to a desulfurization combustion process of a circulating fluidized bed boiler, in particular to a coal slime mixed firing dolomite desulfurization process. Background technique [0002] The circulating fluidized bed boiler is a new type of clean coal-fired boiler developed in the past 30 years. This boiler is widely used because of its good adaptability to coal types, high combustion efficiency, good ash activity, and desulfurization in the furnace. Although the furnace type can achieve desulfurization in the furnace, limestone is used as absorbent to achieve desulfurization in the furnace. The desulfurization index is unstable, which affects the reduction of the boiler combustion load capacity, and is not approved by the environmental protection department. Therefore, the new circulating fluidized bed boiler must be Only the construction of desulfurization equipment outside the furnace can obtain the approval of environmental imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/50
Inventor 林红涛
Owner JINAN QIQUAN THERMOELECTRICITY
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