Pulverized coal oxygen-enriched burner meeting requirements of set deep peak load regulation, and system thereof

An oxygen-enriched combustion and pulverized coal technology, which is applied to burners, burners, combustion methods and other directions of burning powder fuel, can solve the problem of high cost

Inactive Publication Date: 2019-09-06
HARBIN BOILER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the minimum steady combustion load without oil input for domestic unit boiler design is 30%, but in the actual operation process, oil, gas or plasm...

Method used

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  • Pulverized coal oxygen-enriched burner meeting requirements of set deep peak load regulation, and system thereof
  • Pulverized coal oxygen-enriched burner meeting requirements of set deep peak load regulation, and system thereof
  • Pulverized coal oxygen-enriched burner meeting requirements of set deep peak load regulation, and system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment one: if Figure 2-3 As shown, a pulverized coal oxygen-enriched burner that meets the requirements for deep peak regulation of the unit involved in this embodiment includes a primary air channel, a high-temperature oxygen channel, a secondary air channel, an overburned air channel, and a fuel mixing chamber. The chamber is connected to the water-cooled wall of the boiler, and the other side of the fuel mixing chamber is provided with a burn-off air channel, a secondary air channel is provided in the burn-out air channel, and a primary air channel and a high-temperature oxygen channel are provided in the secondary air channel. The air intake hole of the high-temperature oxygen channel protrudes from the side to the outside of the primary air channel.

[0017] The pulverized coal oxygen-enriched combustion system used to meet the requirements of deep peak regulation of the unit proposes a new type of burner that uses high-temperature oxygen-enriched gas to igni...

Embodiment 2

[0018] Embodiment two: if image 3 As shown, in the pulverized coal oxygen-enriched burner that meets the requirements of deep peak regulation of the unit involved in this embodiment, there are three air intake holes in the high-temperature oxygen channel.

[0019] The high-temperature oxygen-enriched gas enters the three inlets of the burner, forming a tangential swirl flow to enhance mixing.

Embodiment 3

[0020] Embodiment three: as figure 1 As shown, the pulverized coal oxygen-enriched combustion system that meets the deep peak-shaving requirements of the unit involved in this embodiment includes a liquid oxygen storage tank, a liquid oxygen supply pump, a gas carburetor, buffer tank, pipeline valve, flue gas-oxygen heat exchanger and the pulverized coal oxygen-enriched burner as claimed in claim 1, the liquid oxygen is stored in the liquid oxygen storage tank, and the liquid oxygen supply pump connects the liquid oxygen storage tank The liquid oxygen in the gas is transported to the gasifier and evaporated into oxygen, and the pressure is controlled through the oxygen buffer tank. The oxygen enters the flue gas-oxygen heat exchanger through the pipeline valve to heat the oxygen, and the high-temperature oxygen enters the pulverized coal for oxygen-enriched combustion through the high-temperature oxygen channel. In the fuel mixing chamber of the burner; in the pulverized coal ...

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Abstract

The invention provides a pulverized coal oxygen-enriched burner meeting the requirements of set deep peak load regulation, and a system thereof, and belongs to the field of coal-fired power generation. The pulverized coal oxygen-enriched combustion system comprises a liquid oxygen storage tank, a liquid oxygen supply pump, a gasifier, a buffer tank, a pipeline valve, an exhaust gas and oxygen heatexchanger and the pulverized coal oxygen-enriched burner. Liquid oxygen stored in the liquid oxygen storage tank is conveyed to the gasifier through the liquid oxygen supply pump, evaporates to gasify into oxygen, is subjected to pressure stabilization in the buffer tank, and enters the exhaust gas and oxygen heat exchanger through the pipeline valve to be heated, and when the temperature reachesthe range from 650 DEG C to 700 DEG C, the oxygen enters the pulverized coal oxygen-enriched burner for ignition to form stable flames. According to the pulverized coal oxygen-enriched burner meetingthe requirements of set deep peak load regulation, and the system thereof, the oxygen-enriched burner carries out stable combustion during starting the low-load operation, the system has the self-stabilization combustion function, and has the advantages of being low in ignition temperature, high in combustion strength, high in combustion speed, high in temperature and complete in combustion reaction, and the boiler stable combustion and low-load operation cost is reduced.

Description

technical field [0001] The invention relates to a pulverized coal oxygen-enriched combustion system meeting the deep peak regulation requirements of a unit, belonging to the field of coal-fired power generation. Background technique [0002] In coal-fired power plants, it has always been a difficult problem to reduce the cost of boiler start-up and low-load stable combustion. With the excess installed capacity of thermal power in recent years, the load rate of many units is very low, and more thermal power units are required to participate in peak regulation of the power grid. Under ultra-low load conditions, the furnace volume heat load, cross-sectional heat load, and furnace center temperature also decrease. Generally, when it is lower than 30%, the entrainment of hot flue gas can no longer meet the requirements for pulverized coal ignition, let alone stable combustion. . [0003] At present, the minimum steady combustion load without oil input for domestic unit boiler de...

Claims

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Application Information

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IPC IPC(8): F23D1/00F23L7/00F23L1/00F23L9/00
CPCF23D1/00F23L1/00F23L7/007F23L9/00Y02E20/34
Inventor 曲道志宋国庆郭建明
Owner HARBIN BOILER
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