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Low-nitrogen combustion fresh air and flue gas proportion regulation equipment

A proportional adjustment and low-nitrogen combustion technology, which is applied in the direction of combustion method, combustion type, and controlled combustion, can solve the problems of low-efficiency low-nitrogen combustion, achieve the effects of improving low-nitrogen combustion efficiency, intuitive comparison results, and improving detection accuracy

Pending Publication Date: 2019-03-26
启明星宇节能科技股份有限公司
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Problems solved by technology

[0007] For this reason, the present invention provides a fresh air flue gas ratio adjustment device for low-nitrogen combustion to overcome the problem of low efficiency of low-nitrogen combustion in the prior art

Method used

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  • Low-nitrogen combustion fresh air and flue gas proportion regulation equipment
  • Low-nitrogen combustion fresh air and flue gas proportion regulation equipment
  • Low-nitrogen combustion fresh air and flue gas proportion regulation equipment

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Embodiment 1

[0079] In this embodiment, the equipment is selected to measure the output of nitrogen oxides in the flue gas. The boiler capacity is 20T, the boiler power is 14MW, and the ratio of flue gas to air is from 80:20 to 10:90, and every 5% is a gear. Use the side described in the present invention to measure it, and measurement result is as shown in table 1

[0080] Table 1

[0081]

[0082] After operation, it can be obtained: the amount of nitrogen oxides is reduced by 100-150mg / m3, the calculated dosage of denitrification is 42.86%, and the operating cost of dosing is reduced: 68% / 42.86% = 1.59-1 = 59%; the proportion of fresh air is reduced by 30%, Reduce the heat taken away by smoke exhaust, and the energy saving can reach about 3%.

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Abstract

The invention relates to low-nitrogen combustion fresh air and flue gas proportion regulation equipment. The equipment comprises a control unit used for a regulating the proportion of air and nitrogen, a flue gas fan used for extracting flue gas, a fresh air fan used for extracting air, a mixing pipeline connected with the flue gas fan and the fresh air fan and used for mixing the flue gas and theair, a boiler arranged at and connected with an outlet of the mixing pipeline and used for combusting fuel, and a stack connected with a boiler exhaust outlet and used for exhausting post-combustionflue gas. According to the equipment provided by the invention, by arranging the control unit in the equipment and arranging the fans for extracting the flue gas and air correspondingly, the power ofthe fans is set through the control unit so as to regulate the proportion of the glue gas and the air, meanwhile, the total amounts of oxynitrides produced under various proportion conditions can be detected and compared, accordingly, the proportion with the minimum produced oxynitride is selected, and low-nitrogen combustion efficiency can reach the maximum while the oxynitride output is lowered.

Description

technical field [0001] The invention relates to the technical field of flue gas recovery, in particular to a fresh air flue gas ratio adjustment device for low-nitrogen combustion. Background technique [0002] The traditional denitrification method adopts the reduction method before the furnace or the oxidation method after the furnace, which has high operating costs, large equipment volume, and cumbersome installation work. In order to improve the denitrification efficiency in the industry, the method of adding a catalyst to remove the stock (SNCR) is generally used. The operating efficiency of this method has been improved. However, after adding the catalyst, the operating cost is increased, and the optimal state of high reaction efficiency and operating cost is still not reached. To this end, a low-nitrogen combustion, fresh air and flue gas matching technology and control equipment are invented. [0003] Oxygen in the air accounts for 21%. The boiler uses fresh air for...

Claims

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Application Information

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IPC IPC(8): F23N1/02F23N5/26F23G7/06
CPCF23G7/06F23N1/02F23N5/26
Inventor 张久明
Owner 启明星宇节能科技股份有限公司
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