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Ignition method of W-shaped boiler

A boiler ignition and boiler technology, which is applied in the direction of combustion ignition, combustion method, ignition by guiding the flame, etc., can solve the problems of difficult ignition and high production cost

Active Publication Date: 2016-10-12
NORTHWEST BRANCH OF CHINA DATANG CORP SCI & TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the coal type of W-type boiler mainly adopts anthracite with low volatile content (22MJ). Although anthracite has high calorific value, it is extremely difficult to ignite. It must be put into use when the unit has a load below 40﹪ The fuel is used to stabilize combustion, and all oil guns cannot be withdrawn until the unit has a load of 50% or more. In 2010, the average fuel consumption of cold start was 100-120 tons / time, and a large amount of fuel consumption resulted in high production costs.

Method used

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Embodiment 1

[0026] The present invention proposes an ignition method for a W-type boiler, including two methods of boiler cold start ignition and hot start ignition, wherein the cold start of the boiler is as follows: the boiler is ignited and started after the boiler is out of service for ≥ 48 hours; The start is: the boiler is shut down for less than 8 hours and ≥ 2 hours after the ignition is started,

[0027] When the boiler starts to ignite in a cold state, it includes the following steps:

[0028] (1) Select several coal mills, and the several coal mills are evenly arranged on the front wall and the rear wall of the boiler respectively, and anthracite is added inside the coal mills;

[0029] (2) Ignite the oil gun inside the boiler;

[0030] (3) Start the primary fan. When at least one of the two blowers is started and the secondary air flow rate is greater than 25% and the conditions are met, the shut-off door of the coal mill will be opened. When the outlet temperature of the coa...

Embodiment 2

[0037] The present embodiment is boiler hot start ignition, and it comprises the following steps:

[0038] (1) Select a number of coal mills, and the several coal mills are evenly arranged on the front wall and the back wall of the boiler, and the mixed coal of bituminous coal and anthracite is added to the coal mills arranged on the front wall of the boiler, among which bituminous coal: Anthracite=7:3; set in the mixed coal of bituminous coal and anthracite in the coal mill on the back wall of the boiler, bituminous coal: anthracite=3:7;

[0039] (2) Ignite the oil gun inside the boiler;

[0040] (3) Start the primary fan. When at least one of the two blowers is started and the secondary air flow rate is greater than 25% and the conditions are met, the shut-off door of the coal mill will be opened. When the outlet temperature of the coal mill reaches 90°C-100°C, Start the coal mill;

[0041] (4) First turn on the coal mills installed on the front wall of the boiler in seque...

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PUM

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Abstract

The invention discloses an ignition method of a W-shaped boiler, relates to an ignition method of a boiler, and particularly relates to the ignition method of the W-shaped boiler. The ignition method of the W-shaped boiler comprises a cold-start ignition method and a hot-start ignition method of the boiler, wherein the cold start of the boiler is the ignition for start after the boiler stops running for not less than 48 hours; and the hot start of the boiler is the ignition for the start after the boiler stops running for less than 8 hours but not less than 2 hours. According to the ignition method of the W-shaped boiler, which is provided by the invention, on one hand, the ignition is carried out by utilizing the characteristic that soft coal is inflammable; on the other hand, coal mills are started orderly according to a sequence; coal powder is slowly added into the boiler amount by amount; the quick ignition of the boiler is realized; the lighting-up time of the coal powder in the boiler and the start time of a whole unit are shortened; meanwhile, an oil gun can be withdrawn when the load of the unit reaches 35 percent; the consumption of fuel oil is decreased; and the production cost is saved to a great extent.

Description

technical field [0001] The invention relates to a boiler ignition method, in particular to a W-shaped boiler ignition method. Background technique [0002] At present, the coal type of W-type boiler mainly adopts anthracite with low volatile content (<8﹪) and high calorific value (>22MJ). Although anthracite has high calorific value, it is extremely difficult to ignite. It must be put into use when the unit has a load below 40﹪ The fuel oil is used to stabilize the combustion, and all the oil guns cannot be withdrawn until the unit has a load of 50% or more. In 2010, the average fuel consumption of the cold start was 100-120 tons / time, and a large amount of fuel consumption resulted in high production costs. Contents of the invention [0003] The invention proposes an ignition method for a W-type boiler with low fuel consumption. [0004] The present invention proposes an ignition method for a W-type boiler, including a boiler cold-state start-up ignition method and...

Claims

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Application Information

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IPC IPC(8): F23Q9/10F23K3/02
CPCF23K3/02F23Q9/10
Inventor 黄建军吉宪磊赵虞凌闫爱军刘志华党岳郭松涛苏超牛波武岳石敏王彪刘奔朱波
Owner NORTHWEST BRANCH OF CHINA DATANG CORP SCI & TECH RES INST
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