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Using method of fired coal boiler

A coal-fired boiler and boiler technology, applied in the field of coal-fired boilers, can solve the problems of high power consumption, low fuel calorific value, incomplete combustion, etc., and achieve the effects of saving power, high furnace temperature, and prolonging service life

Inactive Publication Date: 2008-04-23
郭学礼
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large rated air supply volume, a large amount of cold air enters the furnace, which affects the temperature in the furnace, and easily burns the coal surface, forming nodules and coking, and the coal core is covered, which cannot be fully burned, and the calorific value of the fuel is low. , low heating efficiency
Moreover, due to the strong wind, small particles of carbon are discharged along with the volatile matter, resulting in a waste of coal resources
Moreover, due to the large air supply volume and the large power consumption, the service life of the equipment is also short.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] The present invention will be described in detail below in conjunction with specific examples.

[0012] After the boiler is fed with coal, the induced draft fan blows air into the furnace according to 1 / 20 to 1 / 4 of the rated air supply volume. Under the state of slight negative pressure in the boiler, the coal burns and passes through each air supply chamber in turn, and the blower blows air in the middle and rear of the boiler, and the air supply volume is 1 / 20 to 1 / 4 of the rated air supply volume. . Generally, the pressure of micro-negative pressure is -5 ~ -15 Pa. The air supply volume of multiple central air supply chambers is evenly distributed, and the sum of the air supply volume of the central air supply chambers is 1 / 15 of the rated air supply volume. The air supply volume of multiple rear air supply chambers is evenly distributed, and the sum of the air supply volume of the rear air supply chambers is 1 / 30 of the rated air supply volume. In order to bette...

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Abstract

The inventive method consists in: in a state of keeping micro negative pressure in the boiler, inducing air via a draught fan according to 1 / 20-1 / 4 of the rated induced-draft rate; firing of coal and passing through the blowing chamber in order; blowing-in via an air-blower to the blowing chamber in the middle and back parts of the boiler, the blowing rate is 1 / 20-1 / 4 of the rated blowing rate. Using the inventive method can make coal fire according to the following steps of the evaporations of moisture and chemical matter, the combustions of carbon and unburnt supergranule carbon.

Description

technical field [0001] The present invention relates to a method for using a boiler, and more specifically, relates to a method for using a coal-fired boiler that saves energy by reducing air supply volume, delaying air supply, and delaying combustion. Background technique [0002] At present, chain-type coal-fired boilers are widely used in heating systems, becoming a major consumer of coal and electricity. The using method of existing boiler is: the boiler worker opens induced draft fan and blower by rated air supply volume when boiler burns. Due to the large rated air supply volume, a large amount of cold air enters the furnace, which affects the temperature in the furnace, and easily burns the coal surface, forming nodules and coking, and the coal core is covered, which cannot be fully burned, and the calorific value of the fuel is low. , Low heating efficiency. Moreover, due to the strong wind, small particles of carbon are discharged along with the volatile matter, r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23N3/00F23B30/08
Inventor 郭学礼
Owner 郭学礼