Top-mounted turbulent burner with low NOx emission for water-coal-slurry steam-injection boiler

A technology for steam injection boilers and coal-water slurry, which is applied to burners, lighting and heating equipment, etc., can solve the problems of ash and slag pollution and high NOx emissions, and achieve the effects of high cost, reduced NOx emissions, and low NOx emissions.

Inactive Publication Date: 2017-01-04
SICHUAN TIANFA TECH
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Problems solved by technology

As a substitute for petroleum fuel, coal water slurry has the advantages of cheap price, low pollution, and mature technology. However, compared with gas boilers, the problems of NOx emissions and ash pollution generated during the combustion process of coal water slurry are the keys that need to be solved urgently. , due to the defects of the current burner's own structure, the NOx emission of the existing coal-water slurry burner is generally high

Method used

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  • Top-mounted turbulent burner with low NOx emission for water-coal-slurry steam-injection boiler
  • Top-mounted turbulent burner with low NOx emission for water-coal-slurry steam-injection boiler

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Embodiment Construction

[0015] Attached below figure 1 And attached figure 2 , to illustrate the specific implementation of the present invention.

[0016] The coal water slurry low NOx burner is arranged on the top of the steam injection boiler, figure 1 Arrows are wind direction. From the inside to the outside, there are coal water slurry gun casing 1, primary air duct 2, and inner secondary air duct 3, which are arranged concentrically. The center is the coal water slurry channel, the periphery is the swirl primary air channel, and the outer layer is the The inner secondary air channel of the swirling flow has 8 outer secondary air pipes 4 arranged in a ring at the outermost layer, and all the nozzles face downward. Among them: the primary air cyclone 5 is installed at the outlet of the primary air duct, and the swirl strength is fixed, and the air volume can be adjusted through the primary air door adjustment device 8; the inner secondary air cyclone 6 is installed in the middle of the second...

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Abstract

A top-mounted turbulent burner with low NOx emission for a water-coal-slurry steam-injection boiler is characterized by comprising a water-coal-slurry gun sleeve, a primary airpipe and an inner secondary airpipe, wherein the water-coal-slurry gun sleeve, the primary airpipe and the inner secondary airpipe are coaxially distributed in sequence from the inside to the outside; the outer layer of the inner secondary airpipe is composed of a plurality of outer secondary airpipes, wherein the multiple outer secondary airpipes are annularly distributed at intervals; gaps are reserved between the inner secondary airpipe and the outer secondary airpipes; the gaps are provided with an injection layers; and a high energy igniter sleeve and a fuel gas gun sleeve are installed in the primary airpipe. The top-mounted turbulent burner with low NOx emission for the water-coal-slurry steam-injection boiler reduces emission of the NOx in the water-coal-slurry combusting process.

Description

technical field [0001] The invention relates to a burner, which is characterized in that it is a swirling flow low NOx burner for a coal-water slurry steam injection boiler arranged on the top. Background technique [0002] Heavy oil production in Xinjiang Oilfield in my country uses conventional gas-fired steam-injection boilers. With the influence of two unfavorable factors, the limited use of natural gas and the increase in prices, it is necessary to remanufacture and upgrade the existing conventional gas-fired steam-injection boilers to coal-water slurry superheated oilfield steam-injection boilers. Substituting coal for gas is one of the options for fuel transformation. my country has abundant coal reserves and a complete range of coal types. The development and application of coal-water slurry technology is in line with the national energy policy of replacing oil with coal, and is an important part of promoting clean coal technology. As a substitute for petroleum fuel,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D11/00F23D11/36
Inventor 周俊虎刘茂省杨雪峰汪慧张江林潘宏春
Owner SICHUAN TIANFA TECH
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