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Regenerative combustion device applicable to stable combustion of compounded tangent-flow and direct-flow gas with low calorific value

A combustion device and low calorific value technology, applied in the field of clean utilization of gas, can solve the problems that low calorific value gas is difficult to burn stably and continuously, reduce combustion efficiency and burnout rate, and easily form channel flow, etc. The effect of reducing nitrogen oxides and increasing the degree of fluid mixing

Inactive Publication Date: 2014-06-18
INST OF PROCESS ENG CHINESE ACAD OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pores in the regenerator are complicated, and the gaps in the side walls of the regenerator are large, resulting in uneven fluid distribution, easy to form channel flow, and reducing combustion efficiency and burnout rate
In addition, the heat storage body itself has a complex structure and is difficult to process
[0007] At present, most of the patented technologies are focused on increasing the ignition heat supply to solve the problem of low calorific value gas that is difficult to stably and continuously burn, ignoring the problem of reducing the ignition heat to solve the problem of stable combustion
At the same time, the design of the heat storage body is mostly flat, similar to a heat storage wall, without fully considering the flow field distribution and gas mixing

Method used

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  • Regenerative combustion device applicable to stable combustion of compounded tangent-flow and direct-flow gas with low calorific value
  • Regenerative combustion device applicable to stable combustion of compounded tangent-flow and direct-flow gas with low calorific value
  • Regenerative combustion device applicable to stable combustion of compounded tangent-flow and direct-flow gas with low calorific value

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Embodiment 1

[0038] The present invention is suitable for low-calorific-value gas cut-flow and direct current compound stable combustion and thermal storage combustion device, which can realize cut-flow and direct-current composite air intake and stable combustion and heat storage, and is suitable for stable combustion of low calorific value gas, such as figure 1 As shown, you can choose to use the two-stage combustion stabilization cone design. In this combustion process, firstly, the entire combustion tower is preheated through the ignition hole 11. When the temperature in the combustion tower is higher than 900 ° C, the ignition is stopped, and one pass through the gas inlet At the same time, 55% of the air is supplied through the primary air pipe 9 through the air chamber 12 at the bottom of the combustion tower 3, and mixed with the gas for combustion, and the mixed gas passes through the first-stage combustion stabilizing cone 2 The initial heating and mixing are carried out during th...

Embodiment 2

[0040] This embodiment is suitable for burning low calorific value gas while generating steam. The specific process flow is similar to the process described in embodiment 1, the difference is that this embodiment generates steam by installing a boiler 14 on the top of the combustion tower 3, and the steam is used for the factory's own use or power generation. Membrane walls or heat exchange tube bundles can be arranged inside the combustion tower 3, and the membrane walls or heat exchange tube bundles are connected to the boiler 14, and the internal temperature of the combustion tower can be adjusted by controlling the heat exchange.

Embodiment 3

[0042] This embodiment is suitable for burning low calorific value gas while generating steam. The specific process flow is similar to that described in embodiment 2, except that the combustion tower 3 is connected to the boiler 14 through pipes in this embodiment. The boiler form can be a hot water boiler or a low pressure steam boiler. This type of connection means that the boiler load can be flexibly changed according to the production demand, and will not affect the combustion process of low calorific value gas.

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Abstract

The invention relates to the clean utilization field of gas and relates to a device applicable to combustion of gas with the low calorific value. The device comprises a combustion tower (3), a gas inlet (1), a smoke outlet (5), a primary air pipe (9) which is communicated with an air chamber (12), an ignition hole (11), a secondary air pipe (8) and a combustion stabilizing cone (2), wherein the secondary air pipe (8) is connected with a plurality of branch gas pipes (7) through multistage of annular distributors (6); the branch gas pipes (7) are tangentially communicated with the inside of the combustion tower (3); the combustion stabilizing cone (2) is cone-shaped or frustum-shaped and arranged above the gas inlet (1) in the combustion tower (3); a plurality of channels are evenly formed in the wall surface of the combustion stabilizing cone. The device is capable of reducing heat needed by igniting the gas with the low calorific value in a hierarchical air supply manner, increasing the ignition heat supply through a multi-channel regenerative combustion stabilizing cone, facilitating the mixing of the compounded tangent-flow and direct-flow gas and the air in a manner of compounding tangent flows and direct flows, so that the efficient and stable combustion of the gas with the low calorific value is realized.

Description

technical field [0001] The invention relates to the field of clean utilization of gas, in particular, the invention relates to a combustion device suitable for low-calorific-value gas cut-flow and direct-current compound stable combustion and thermal storage. Background technique [0002] With the rapid development of my country's industry, more and more occasions will produce various low-quality combustible gases with low calorific value, low combustible components, and unstable combustion performance. Common low-calorific gas fuels mainly include low-calorific value tail gas in chemical processes , blast furnace gas, petrochemical industry smelting tail gas, low-concentration coal mine gas, and C produced by biomass pyrolysis 2 h 2 , CO, CH 4 and other combustible gas, and biogas produced in the breeding and brewing industry. With the improvement of national environmental protection requirements, this kind of combustible gas will not be directly discharged into the atmos...

Claims

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Application Information

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IPC IPC(8): F23C7/02F23L9/00
Inventor 姚常斌王山峰许光毅柯宗育许光文
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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