CN102980205B - Technology and device for cold-state ignition of low-emission boiler - Google Patents
Technology and device for cold-state ignition of low-emission boiler Download PDFInfo
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- CN102980205B CN102980205B CN201210495548.9A CN201210495548A CN102980205B CN 102980205 B CN102980205 B CN 102980205B CN 201210495548 A CN201210495548 A CN 201210495548A CN 102980205 B CN102980205 B CN 102980205B
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Abstract
The invention relates to a technology and a device for cold-state ignition of a low-emission boiler. The technology is characterized in that one part of combustible gas generated during the preparation of active coke is delivered to the position where an ignition gun is located to be ignited, passed pulverized coal flow is ignited, pulverized coal mixture after being ignited is burnt in a boiler main burning area after being ignited, another part of the combustible gas is delivered to a boiler reburning area and is formed into reducing ambinent under the condition that the excess air coefficient is less than 1, nitric oxide generated in the boiler main burning area can be reduced, and thus the reburning denitration can be realized. According to the technology and the device, disclosed by the invention, the combustible gas generated by an active coke preparation furnace is ignited by the ignition gun, the ignition temperature of gas fuel is low, needed ignition heat is less, the gas fuel can be quickly ignited, the pulverized coal flow can be rapidly ignited, the purpose of low emission of nitric oxide can be realized at the same time, and the denitration efficiency can be up to 45%-65%.
Description
Technical field
The present invention relates to a kind of technique and device that utilizes byproduct in activated coke preparation to carry out ignition of the boiler and denitration by refueling.
Background technology
Along with the development of Chinese national economy, the demand of the energy is increased day by day, and petroleum resources are verified limited amount in China.At present, China all will spend a large amount of foreign exchange Imported oils every year.Power industry is the rich and influential family of fuel consume, according to electric power statistics in recent years: Coal-fired group accounts for 74.8% of total installation of generating capacity, by approximately 2,330,000 tons of oil masses, account for total 31.9% of oil mass of using, combustion-supporting, stable combustion oil while being mainly ignition of the boiler oil and underrun.In order to reduce the consumption of petroleum resources, greatly develop thermal power plant's fuel-economizing new technology extremely urgent.
Though at present popular plasma ignition device be non-oil ignition, can complex structure, cost are higher, and also easily wearing and tearing, slagging scorification in combustion barrel of coal dust, make the increase of breeze airflow flow resistance, be unfavorable for safe operation.Because of plasma generator Power Limitation, when burning meager coal and anthracite, be difficult for igniting, combustion instability.
Meanwhile, in thermal power plant's combustion process, can produce a large amount of oxides of nitrogen gas.Oxides of nitrogen gas not only stimulates people's respiratory system, and infringement animals and plants, damage the ozone layer, and be to cause one of greenhouse effects, acid rain and photochemically reactive main matter.Controlling oxides of nitrogen gas Production and emission is significant.
In addition, in activated coke preparation process, can produce a large amount of fuel gas, be mainly the mist of carbon monoxide, hydrogen and methane, calorific value is higher.This part fuel gas is realized to recycling, can obtain larger economic benefit.
Therefore, need a kind of new equipment in order to replace grease gun igniting and higher, the baroque plasma ignition device of cost of existing consumption great amount of fuel oil, and can realize nitrogen oxide low emission, and make full use of the byproduct producing in activated coke preparation process, realize recycling.
Summary of the invention
The object of this invention is to provide a kind of technique and device of low emission boiler cold-state igniting, can not only realize the device of non-oil ignition, in order to replace grease gun igniting and higher, the baroque plasma ignition device of cost of existing consumption great amount of fuel oil, and can realize nitrogen oxide low emission, and make full use of the byproduct producing in activated coke preparation process.
The technical scheme that the present invention takes is:
A kind of technique of low emission boiler cold-state igniting, the fuel gas part producing in activated coke preparation is delivered to the igniting of burning torch place, the wind breeze airflow of process is lighted, wind coal dust intermixture after lighting enters the burning of boiler primary zone, another part is delivered to boiler reburning zone and is less than at excess air coefficient under 1 condition and forms reducing atmosphere, the reduction of nitrogen oxide that primary zone is produced, realizes denitration by refueling.
The described fuel gas of delivering to the igniting of burning torch place, accounts for 75% ~ 85% of total gas.
A kind of device of low emission boiler cold-state igniting, comprise that activated coke prepares stove, activated coke is prepared furnace upper end and is provided with ignition gas carrier pipe and fires air shooter again, the outlet of ignition gas carrier pipe is located at burning torch place, burning torch be located at a wind coal dust intermixture pipeline near enter boiler primary zone place, boiler divides boiler primary zone, boiler reburning zone, boiler combustion exhausted district, then fires air shooter and communicate with boiler reburning zone.
A described wind coal dust intermixture pipeline overcoat has Secondary Air pipeline.
What burning torch of the present invention was lighted is that activated coke is prepared the fuel gas that stove produces, the ignition temperature of gaseous fuel is low, required ignition heat is little, can quick ignition, breeze airflow ignites rapidly, make the timely stable ignition of breeze airflow, during especially for burning meager coal, anthracite, can realize rapid-ignition and start.And the present invention is compared with grease gun igniting and plasma ignition device, and burning torch is common electricity sparking, and simple in structure, security is good.
The present invention can realize in stove combustion process and suppressing and nitrogen oxides reduction discharge.On the one hand, do not affect catch fire and prerequisite that coal dust is dry under, because the ignition heat of gaseous fuel is less, can suitably reduce wind wind-warm syndrome one time, can obviously reduce the discharge capacity of thermal NO.On the other hand, then combustion gas body passes into burner hearth reburning zone II by combustion gas body pipeline again, is less than under 1 condition forms reducing atmosphere at excess air coefficient, makes reduction of nitrogen oxide, realizes denitration by refueling.And, for subduing of nitrogen oxide, the gaseous fuel that hydrogen atoms is many is better than solid fuel, the fuel that fuel ratio volatile matter that volatile matter is high is low is good, in fuel gas, hydrogen atoms amount is many, and nitrogen-atoms amount is few, therefore, the present invention can realize the object of nitrogen oxide low emission, and denitration efficiency can reach 45% ~ 65%.
Brief description of the drawings
Fig. 1 is the structural representation of the device of low emission boiler cold-state igniting of the present invention.
Wherein: 1, activated coke is prepared stove, 2, fire air shooter again, 3, ignition gas carrier pipe, 4, a wind coal dust intermixture pipeline, 5, Secondary Air pipeline, 6, burning torch, I, boiler combustion exhausted district, II, boiler reburning zone, III, boiler primary zone.
Detailed description of the invention
Further illustrate below in conjunction with accompanying drawing.
A kind of device of low emission boiler cold-state igniting, comprise that activated coke prepares stove 1, activated coke is prepared stove 1 upper end and is provided with ignition gas carrier pipe 3 and fires air shooter 2 again, 3 outlets of ignition gas carrier pipe are located at burning torch 6 places, burning torch 6 be located at a wind coal dust intermixture pipeline 4 near enter boiler primary zone place, boiler divides boiler primary zone III, boiler reburning zone II, boiler combustion exhausted district I, then fires air shooter 2 and communicate with boiler reburning zone II.One time wind coal dust intermixture pipeline 4 overcoats have Secondary Air pipeline 5.
Prepare stove 1 gas out from activated coke and be divided into two parts, a part is ignition gas, account for 75% ~ 85% of total gas, enter burner by ignition gas carrier pipe 3, ignition gas carrier pipe 3 is arranged in a wind pulverized coal channel 4, the ignition gas of ejection is lighted by burning torch 6, and the breeze airflow that ignites rapidly after gas ignition is realized fast and being started.Secondary Air mixes with the air-flow that catches fire in boiler primary zone III by Secondary Air pipeline 5, guarantees that coal dust fully burns.Another part is combustion gas body again, accounts for 15% ~ 25% of total gas, enters boiler reburning zone II by firing air shooter 2 again, is less than under 1 condition forms reducing atmosphere at excess air coefficient, makes reduction of nitrogen oxide, realizes denitration by refueling.
Utilize activated coke to prepare that byproduct is lighted a fire and denitration by refueling method and device carry out boiler cold-state ignition trigger, not only can start rapidly, simple in structure, security is good, the more important thing is and can save a large amount of fuel oils, reduce the consumption of petroleum resources, can also control the discharge of nitrogen oxide and realize recycling simultaneously, significant.
Claims (4)
1. the technique of a low emission boiler cold-state igniting, it is characterized in that, the fuel gas part producing in activated coke preparation is delivered to the igniting of burning torch place, the wind breeze airflow of process is lighted, wind coal dust intermixture after lighting enters the burning of boiler primary zone, another part is delivered to boiler reburning zone and is less than at excess air coefficient under 1 condition and forms reducing atmosphere, and the reduction of nitrogen oxide that primary zone is produced, realizes denitration by refueling.
2. the technique of a kind of low emission boiler cold-state igniting according to claim 1, is characterized in that, the described fuel gas of delivering to the igniting of burning torch place, accounts for 75% ~ 85% of total gas.
3. the device of a low emission boiler cold-state igniting, it is characterized in that, comprise that activated coke prepares stove, activated coke is prepared furnace upper end and is provided with ignition gas carrier pipe and fires air shooter again, the outlet of ignition gas carrier pipe is located at burning torch place, burning torch be located at a wind coal dust intermixture pipeline near entering boiler primary zone place, boiler divides boiler primary zone, boiler reburning zone, boiler combustion exhausted district, then fires air shooter and communicate with boiler reburning zone.
4. the device of a kind of low emission boiler cold-state igniting according to claim 3, is characterized in that, a described wind coal dust intermixture pipeline overcoat has Secondary Air pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210495548.9A CN102980205B (en) | 2012-11-28 | 2012-11-28 | Technology and device for cold-state ignition of low-emission boiler |
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| CN201210495548.9A CN102980205B (en) | 2012-11-28 | 2012-11-28 | Technology and device for cold-state ignition of low-emission boiler |
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| CN102980205A CN102980205A (en) | 2013-03-20 |
| CN102980205B true CN102980205B (en) | 2014-10-08 |
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Families Citing this family (1)
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| CN108397768A (en) * | 2018-04-27 | 2018-08-14 | 重庆富燃科技股份有限公司 | A kind of device and method that coal gas is applied to coal-fired electric generation furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5315939A (en) * | 1993-05-13 | 1994-05-31 | Combustion Engineering, Inc. | Integrated low NOx tangential firing system |
| CN1216248C (en) * | 2004-03-09 | 2005-08-24 | 江苏双良锅炉有限公司 | Boiler with preprocess function of automatic burning coke oven crude gas |
| CN101852427B (en) * | 2010-06-18 | 2012-03-28 | 华南理工大学 | Petroleum coke direct burner |
| CN202082935U (en) * | 2010-12-02 | 2011-12-21 | 上海德洲科技发展有限公司 | Ignitable industrial waste gas boiler |
| CN202927882U (en) * | 2012-11-28 | 2013-05-08 | 山东大学 | Cold state ignition device for low-emission boiler |
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