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Low-heating-value gas combusting system and control method

A low calorific value gas and combustion system technology, applied in the direction of combustion methods, gas fuel burners, burners, etc., can solve problems such as secondary pollution, system safety impact, black smoke, etc., to achieve less pollutant emissions, lean The effect of wide combustion limit and high heat utilization rate

Inactive Publication Date: 2020-04-17
SONGSHAN LAKE MATERIALS LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The burner of the ground torch works in the way of atmospheric combustion. Compared with the mature and general-purpose industrial blast diffusion burner, the diffusion combustion effect of the ground torch atmospheric burner is not good, and there are problems such as black smoke and CO exceeding the standard. The safety issues of environmental protection emissions and CO poisoning are prominent
[0004] Another common method to deal with low calorific value gas is regenerative combustion (RTO) technology, but the composition of organic waste gas is relatively complex and unstable. For example, there are intermittent changes in the concentration and amount of organic waste gas in fine chemical industries, and due to The flue gas flow is not easy to adjust, making it difficult to control the combustion preheating temperature, which has a major impact on the safety of the system
At the same time, RTO technology has a high combustion temperature, which is easy to produce high-temperature thermal nitrogen oxides, causing secondary pollution
[0005] In general, the existing technology cannot burn safely and stably when dealing with low calorific value gases

Method used

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  • Low-heating-value gas combusting system and control method
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  • Low-heating-value gas combusting system and control method

Examples

Experimental program
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Embodiment 1

[0053] Please refer to figure 1 , the embodiment of the present application provides a low calorific value gas combustion system, including: a combustion chamber, a premixing chamber 110, a low calorific value gas pipeline 18, an auxiliary gas pipeline 16, a high calorific value gas pipeline 17, a calorific value detection device, and a control system ;

[0054] The low calorific value gas pipeline 18, the combustion gas pipeline 16 and the high calorific value gas pipeline 17 are respectively used to feed low calorific value gas, combustion supporting gas and high calorific value gas into the premixing chamber 110, and the premixing chamber 110 is used to mix the gases and pass them into the combustion chamber. room;

[0055] The calorific value detection device is used to detect the calorific value of gas in the low calorific value gas pipeline 18;

[0056] The control system is used to control the gas flow in the high calorific value gas pipeline 17 according to the gas c...

Embodiment 2

[0067] Please refer to Figure 5 , the embodiment of the present application provides a low calorific value gas combustion system, including: a combustion chamber, a first premixing chamber 29, a second premixing chamber 213, a low calorific value gas pipeline 27, an auxiliary gas pipeline 211, and a high calorific value gas pipeline 26. Calorific value detection device and control system;

[0068] The low calorific value gas pipeline 27 and the high calorific value gas pipeline 26 are respectively used to feed low calorific value gas and high calorific value gas into the first premixing chamber 29, and the combustion-supporting gas pipeline 211 is used to feed combustion-supporting gas into the second premixing chamber 213. The first premixing chamber 29 is used to mix the low calorific value gas and the high calorific value gas and pass it into the second premixing chamber 213, and the second premixing chamber 213 is used to pass the mixed gas and oxidant gas into the first ...

Embodiment 3

[0081] The embodiment of the present application provides a control method for a low calorific value gas combustion system. The low calorific value gas combustion system includes a combustion chamber, a premixing chamber, a low calorific value gas pipeline, an auxiliary gas pipeline, a high calorific value gas pipeline, a low calorific value gas pipeline, The combustion-supporting gas pipeline and the high-calorific value gas pipeline are respectively used to feed low calorific value gas, combustion-supporting gas and high calorific value gas into the premixing chamber. The premixing chamber is used to mix the gases and then pass them into the combustion chamber. The control methods include:

[0082] Obtain the gas calorific value in the low calorific value gas pipeline;

[0083] According to the obtained gas calorific value, the gas flow in the high calorific value gas pipeline is controlled.

[0084] Wherein, for the specific structure and functions of the combustion system ...

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Abstract

The invention provides a low-heating-value gas combusting system and a control method, and relates to the technical field of low-heating-value gas treatment. The low-heating-value gas combusting system comprises a combusting chamber, a pre-mixing chamber, a low-heating-value gas pipeline, a combustion-supporting gas pipeline, a high-heating-value gas pipeline, a heating value detecting device anda control system. The low-heating-value gas pipeline, the combustion-supporting gas pipeline and the high-heating-value gas pipeline are used for introducing low-heating-value gas, combustion-supporting gas and high-heating-value gas into the pre-mixing chamber correspondingly. The pre-mixing chamber is used for mixing the gas and introducing the mixed gas into the combusting chamber. By means ofthe low-heating-value gas combusting system and the control method, the low-heating-value gas can reach the continuous and stable combusting state, and the environmental protection treatment problem of the low-heating-value gas can be solved.

Description

technical field [0001] The present application relates to the technical field of low calorific value gas processing, and in particular, relates to a low calorific value gas combustion system and a control method. Background technique [0002] Low calorific value gas refers to fuel gas with calorific value less than 6.28MJ / m3. Common low calorific value gas fuels mainly include low calorific value tail gas in the chemical process, blast furnace gas, petrochemical industry smelting tail gas, coal mine low-concentration gas, and coal mine exhaust gas. , biomass gasification gas, landfill gas, volatile organic compounds (VOCs), etc. my country's annual emptying of a large amount of low calorific value gas not only leads to a huge waste of resources, but also causes serious greenhouse effect problems. The total amount of coke oven gas, smelting tail gas, and biomass methane exhausted every year is about 50 billion cubic meters, which is equivalent to about 25 million tons of sta...

Claims

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Application Information

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IPC IPC(8): F23G7/06F23G5/50F23G5/44F23D14/02F23D14/62
CPCF23D14/02F23D14/62F23G5/44F23G5/50F23G7/06
Inventor 任志恒付超孔凡磊王小艳战斗
Owner SONGSHAN LAKE MATERIALS LAB