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Low-nitrogen combustion type garbage incinerator and combustion method

A waste incinerator and waste incineration technology, applied in the direction of combustion method, incinerator, combustion type, etc., can solve the problems of high equipment cost, high cost, high operation and maintenance costs, and achieve good denitrification effect and simple structure

Active Publication Date: 2015-04-29
EVERBRIGHT ENVIRONMENTAL TECH EQUIP CHANGZHOU +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of waste incineration, the existing low-nitrogen combustion technology is mainly flue gas recirculation technology, that is, a certain amount of flue gas is extracted from the waste heat boiler or the flue gas purification system, and the extracted flue gas is recycled through the nozzles in the furnace. Denitrification into the furnace again to reduce the oxygen content in the furnace, thereby inhibiting the NO produced during the combustion process x , but this technology has high equipment cost and high operation and maintenance costs
[0006] Currently domestic waste incineration power plant NO x The emission requirements are becoming more and more stringent, and the existing denitrification technology has high equipment costs and high operation and maintenance costs, so a low-nitrogen combustion device with good denitrification effect and low operation and maintenance costs is needed

Method used

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  • Low-nitrogen combustion type garbage incinerator and combustion method
  • Low-nitrogen combustion type garbage incinerator and combustion method

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Embodiment 1

[0049]In order to solve the problems existing in the prior art, the present invention provides a low-nitrogen burning garbage incinerator, which includes an incinerator 1, a first air extraction port 2, a first electric damper 3, and a second electric damper 4 , the second air extraction port 5, Venturi flowmeter 6, air duct main pipe 7, fan 8, temperature sensor 9, pressure sensor 10, third electric damper 11, nozzle header 12, nozzle 13 and secondary air nozzle 14.

[0050] The waste incinerator of the present invention will be further described below in conjunction with the accompanying drawings. First, the waste incinerator in the present invention at least includes a feed inlet, a feed grate, a fire grate for waste incineration in the furnace, and a fire grate located in the hearth. The primary air supply system at the lower part of the incinerator grate, the secondary air supply system at the throat of the furnace and the slag discharger. In addition, the garbage inciner...

Embodiment 2

[0062] The present invention also provides a combustion control method of a low-nitrogen combustion waste incinerator, said method comprising the following steps:

[0063] Step S1: Turn on the fan during the waste incineration process, so that the flue gas drawn from the first air extraction port at the tail of the waste incinerator enters the air duct main pipe;

[0064] Step S2: The flue gas is sprayed into the flue through the duct main pipe, and mixed with the flue gas in the flue to reduce the oxygen content in this area and suppress NO x The formation and reduction of part of NO x .

[0065] In the method, the excess air ratio of the incinerator should be controlled within the range of 1.4 to 1.65, and the ratio of the primary air to the secondary air is 8:2, and the amount of flue gas extracted from the first air extraction port 2 is the primary air volume 25%~35% of (in Nm 3 / h unit shall prevail).

[0066] Further, the first electric damper 3 is opened, the second...

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Abstract

The invention provides a low-nitrogen combustion type garbage incinerator. The low-nitrogen combustion type garbage incinerator comprises a garbage incinerator grate positioned in a hearth, and a smoke channel positioned above the front end of the garbage incinerator grate; the garbage incinerator further comprises a first air pumping opening and a main air channel pipe; the first air pumping opening is formed above the hearth at the tail end of the garbage incinerator; two ends of the main air channel pipe are respectively communicated with the first air pumping opening and the smoke channel; an air blower is arranged on the main air channel pipe to inject smoke pumped by the first air pumping opening into the smoke channel. The device and method have the advantages that 1) the structure is simple and compact, the denitration effect is good, and additional SCR system is saved in the smoke purifying system; 2) the device cost is less than that of other low-nitrogen combustion technology, and moreover, the cost of operation and maintenance is relatively low, and the denitration effect is good.

Description

technical field [0001] The invention relates to the field of garbage incineration, in particular, the invention relates to a low-nitrogen burning garbage incinerator and a combustion method. Background technique [0002] During the use of domestic waste incineration grate, the function of feeding grate is very critical, and its reliability directly affects the reliability of the entire incinerator and even the entire incineration power plant, thus affecting the domestic waste treatment capacity and economic benefits. [0003] Most of the existing waste incinerators use mechanical waste incinerators. figure 1 The shown garbage incinerator is just one of them. Such as figure 1 As shown, the waste incinerator includes a feed inlet 101, a feed grate 102, a fire grate 103 for waste incineration located in the furnace, a primary air supply system 104 located at the lower part of the incinerator grate, and a The secondary air supply system 105 and the slag discharger 106. In a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/00F23G5/44F23G5/50
CPCF23G5/00F23G5/44F23G5/50
Inventor 郭镇宁韩乃卿胡利华王进涂叔颖罗智宇邵哲如
Owner EVERBRIGHT ENVIRONMENTAL TECH EQUIP CHANGZHOU