Combustion quality analysis and control system for industrial kiln

A combustion quality, industrial furnace technology, applied in the control of combustion, lighting and heating equipment, etc., can solve the problems of furnace hole flame channeling, reducing combustion temperature, excessive air distribution, etc., achieving great environmental protection benefits and reducing oxidation burning loss , to ensure the effect of burning

Inactive Publication Date: 2007-10-17
夏学苏
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The air volume control method is an open-loop automatic or manual control method, that is, the air volume is controlled according to the change of the fuel volume in order to achieve the purpose of completely burning or basically completely burning the industrial furnace. This air distribution method is very inconvenient. Reasonable, such as excessive air distribution (that is, the actual air volume is much greater than the theoretical demand) or insufficient air distribution (that is, the actual air volume is far less than the theoretical demand) and other problems
Excessive air distribution will cause the motor to consume more electric energy. Excessive air distribution will also cause the furnace temperature to drop and the amount of ...

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  • Combustion quality analysis and control system for industrial kiln
  • Combustion quality analysis and control system for industrial kiln

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Experimental program
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Embodiment 1

[0017] As shown in accompanying drawing 1, the described industrial kiln combustion quality analysis and control system is also called low-oxygen combustion control system. N (an integer of N≥1) burners 11 are installed on the furnace body of the furnace 1 , one end of the burner 11 is connected to the fuel regulating valve 10 , and the other end of the burner 11 communicates with the hearth of the furnace 1 . The kiln 1 can be selected from a heating furnace or a hot blast furnace or a boiler or other fuel-burning kilns. The fuel entering the burner 11 through the fuel regulating valve 10 can be gaseous fuel (such as coke oven gas, blast furnace gas, converter gas, producer gas or its mixed gas, natural gas, liquefied gas, etc.), liquid fuel (such as heavy oil, diesel oil, etc.) ) or solid fuel (such as pulverized bituminous coal or anthracite or lump coal, etc.). There is a flue 2 at the tail of the kiln 1, and a heat exchanger 3 is installed in the flue 2. An air regulati...

Embodiment 2

[0020]As shown in Figure 2, N (an integer of N ≥ 1) burners 11 are installed on the body of the furnace 1, one end of the burner 11 is connected to the fuel regulating valve 10, and the other end of the burner 11 is connected to the furnace 1 There is a flue 2 at the end of the kiln 1, and a heat exchanger 3 is installed in the flue 2. An air regulating valve 9 is installed at the air inlet of the burner 11. The air valve throttle 9 is connected to the outlet of the heat exchanger 3 through the hot air pipe 7, and the inlet of the heat exchanger 3 is connected to the air suction port 5 through the cold air pipe 6. The blower unit 4 has a bypass valve 8 between the cold air pipe 6 and the hot air pipe 7 . Oxygen sensor 21 is installed in the inner cavity of furnace kiln 1, and oxygen sensor 21 can select high-temperature oxygen sensor for use. The signal output end of the oxygen sensor 21 is connected with the acquisition signal input end of the controller 22, the control disp...

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Abstract

The invention discloses a burning quality analysis and control system used for industrial stoves such as heating furnace, hot blast stove, boiler. Sampling pipe disposed at tail of the stove or in flue transfers sampled flue gas to purifying sampling chamber after the flue gas has been cooled, and oxygen sensor detects oxygen content value of the flue gas. As the oxygen content value of the flue gas in stove exceeds the predetermined value, i.e. excessive air distribution, the oxygen transmits the signal to a controller for comparing, operating or processing, and then transmits the processed signal to speed governor to reduce the rotation speed of blower group, i.e. air reduction, until air amount is appropriate; contrarily, if the oxygen content value of the flue gas in stove, detected by the oxygen sensor, is lower than the predetermined value, i.e. lacking air distribution, the speed governor will increase the rotation speed of the blower group, i.e. air increase, until air amount is appropriate, thereby, keeping the air consumption system of the stove in region of 1.0 to 1.1. The analysis and control system can not only improve burning quality of the industrial stove thereby providing economic benefit for user, but can also greatly reduce the emission of nitrogen oxides or carbon monoxide, therefore, has great popularization value.

Description

technical field [0001] The invention relates to a combustion control system for industrial furnaces, in particular to a combustion quality analysis and control system that can ensure the combustion quality of gas or liquid or solid fuels used in industrial furnaces such as heating furnaces, hot blast furnaces, and boilers. . Background technique [0002] Ensuring the combustion quality of industrial furnaces has always been a topic of concern and research around the world. When burning gas, liquid or solid fuels, industrial furnaces not only have poor combustion quality, but also seriously pollute the environment. Due to the extensive economic development in our country, there was insufficient understanding of the combustion quality of industrial furnaces in the past, and the research on its measurement and control technology was relatively backward. For example, the existing furnace temperature control, pulse combustion control, etc. all control the combustion quantity. Th...

Claims

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Application Information

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IPC IPC(8): F23N5/00
Inventor 夏学苏谢鹏艺
Owner 夏学苏
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