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 i

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] Example 1

[0038] The present invention is suitable for the low calorific value gas cut-flow and direct-current composite stable combustion heat storage combustion device, which can realize the cut-flow and direct-current composite air intake and stable combustion and heat storage, and is suitable for the stable combustion of low-calorific value gas, such as figure 1 As shown in the figure, the design of the secondary combustion stabilization cone can be selected. In this combustion process, the entire combustion tower is first preheated through the ignition hole 11. When the temperature in the combustion tower is higher than 900 °C, the ignition is stopped, and a gas inlet is Low calorific value gas is fed, and air is supplied from the air distribution box 10 at the same time, 55% of the air is supplied through the primary air duct 9 through the air chamber 12 at the bottom of the combustion tower 3, mixed with the gas for combustion, and the mixed gas passes through t...

Example Embodiment

[0039] Example 2

[0040] This embodiment is suitable for burning low calorific value gas to generate steam at the same time. The specific process is similar to that described in Embodiment 1. The difference is that in this embodiment, a boiler 14 is installed on the top of the combustion tower 3 to generate steam, and the steam is used for self-use or power generation in the factory. A membrane wall or heat exchange tube bundle can be arranged inside the combustion tower 3, and the membrane wall or heat exchange tube bundle is connected to the boiler 14, and the internal temperature of the combustion tower can be adjusted by controlling the heat exchange.

Example Embodiment

[0041] Example 3

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