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Combustion method of low-pressure and low-concentration methane gas and device

A low-concentration gas and combustion device technology, applied in combustion methods, gas fuel burners, burners, etc., can solve the problems of high fuel gas cost, large emission pollution, etc., and achieve simple structure, reliable combustion, and low combustion cost. Effect

Inactive Publication Date: 2010-05-26
CHONGQING UNIV
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  • Application Information

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Problems solved by technology

The cost of fuel gas is high, and the emission pollution after combustion is relatively large

Method used

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  • Combustion method of low-pressure and low-concentration methane gas and device
  • Combustion method of low-pressure and low-concentration methane gas and device

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] The combustion method of low-pressure and low-concentration gas uses an inner pipe and an outer pipe connected to the combustion chamber as an intake pipe, the inner pipe is a gas passage, and the passage between the inner pipe and the outer pipe is an air passage. When the air in the air channel enters the combustion chamber at high speed, a negative pressure is formed at the outlet of the gas channel, and the low-pressure and low-concentration gas in the gas channel is sucked into the combustion chamber, where they are mixed and combusted. The burned gas can be used as a heat source for large and medium-sized thermal equipment such as boilers and other industrial furnaces.

[0027] Gas contains 10% to 75% CH by volume 4 . After sampling inspection, the introduction of CH containing 10% volume 4 gas, which contains 50% CH b...

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Abstract

The invention discloses a combustion method of low-pressure and low-concentration methane gas. In the combustion method, an inner pipe and an outer pipe which are communicated with a combustion chamber are adopted as an air inlet pipe, wherein the inner pipe is a fuel gas channel, and a channel between the inner pipe and the outer pipe is an air channel; air inside the air channel enters the combustion chamber at high speed and forms negative pressure at the outlet of the fuel gas channel; and the low-pressure and low-concentration methane gas inside the fuel gas channel is absorbed into the combustion chamber and combusts in the combustion chamber in a mixing mode. The invention also provides a combustion device for realizing the combustion method. By utilizing the negative pressure formed at the outlet of the inner pipe when the air enters into the combustion chamber through the air channel and a great injection action generated by the negative pressure on the low-pressure low-concentration methane gas inside the inner pipe, the invention promotes the low-pressure and low-concentration methane gas to enter into the combustion chamber to mix with the air for combustion, and has the advantages of low combustion cost and less discharged pollution of the combustion.

Description

technical field [0001] The invention relates to a method and device for burning gas, in particular to a method and device for burning low-pressure and low-concentration gas. Background technique [0002] Gas is a kind of self-storage unconventional natural gas mainly composed of methane, which is generated during coal formation and exists in coal seams and their surrounding rocks in an adsorbed and free state. The main component of gas is CH 4 , its greenhouse effect is higher than that of CO 2 20-60 times larger, the ability to destroy the ozone layer is CO 2 7 times. [0003] Gas is a high-quality clean energy. The pollutants emitted by combustion are 1 / 40 of that of petroleum and 1 / 800 of that of coal; when coalbed methane with the same calorific value is burned, the emission of particulate matter is only 1 / 616 of that of coal, SO 2 It is 1 / 120 of coal burning, and CO is only 1 / 132 of coal burning. [0004] Low-concentration gas is different from conventional natural...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D14/04F23D14/46F23D14/66
CPCY02E20/34
Inventor 张力唐强蒲舸冉景煜伍成波闫云飞
Owner CHONGQING UNIV
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