Slag residual heat utilization apparatus for industrial boiler

Abstract

The invention relates to a deslagging residual heat utilizing device for an industrial boiler and aims to effectively utilize the deslagging residual heat of the boiler and reduce cooling water amount of the boiler slag. The device comprises a boiler slag separating plate, a slag crusher, a hydraulic oil cylinder, a heat exchanging device, a gas locking device, a flow guiding plate, an exhaust pipe, a heat insulation wall and a support beam, wherein the boiler slag separating plate comprises a slag scraping plate and a harrow-shaped hearth, the upper end of the slag scraping plate is positioned on the lower side of a boiler grate, and the lower end of the slag scraping plate is connected with the harrow-shaped hearth; the slag scraping plate is arranged on the heat insulation wall; the slag crusher comprises a connecting rod and a slag cutter; the slag cutter is a plurality of pairs of iron bars welded on a cross rod; the heat exchanging device comprises a header and heat exchanging water pipes, the header is communicated with the heat exchanging water pipes, the header is fixed outside the heat insulation wall, each heat exchanging water pipe is bent into an S shape, a boiler slag channel is formed between two layers of heat exchanging water pipes, and the heat exchanging water pipes are arranged in the inner space of the heat insulation wall; the gas locking device comprises the flow guiding plate, a separating bar and an automatic sealing plate; and the heat insulation wall on the lower side of the flow guiding plate is provided with the exhaust pipe.

Description

technical field [0001] The invention relates to an industrial boiler slag discharge waste heat utilization device. Background technique [0002] Large-scale coal-fired industrial boilers are widely used, but due to miscellaneous coal sources, unstable coal quality, and generally high ash content, the amount of slag discharged from the boiler is large, and the slag discharge temperature is as high as 500-800°C. The waste heat of the slag can not be effectively utilized, which directly affects the thermal efficiency of the boiler. Currently, high-temperature slag is generally cooled by water. Because of the large amount of vaporization of cold slag water, the water consumption is large, and the vaporized steam will corrode the equipment and civil structures in the boiler room, which makes the operating cost of the boiler higher. Contents of the invention [0003] The object of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provid...

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Problems solved by technology

[0002] Large-scale coal-fired industrial boilers are widely used, but due to miscellaneous coal sources, unstable coal quality, and generally high ash content, the amount of slag discharged from the boiler is large, and the slag discharge temperature is as high as 500-800°C. The waste heat of the slag can not be effectively utilized, which directly affects the thermal efficiency of the boiler

At present, high temperature slag is generally cooled by water. Due to the large amount of vaporization of cold slag water, the water consumption is large, and the vaporized steam will corrode the equipment and civil structures in the boiler room, which makes the operating cost of the boiler higher.

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