CN202048592U - Alternating-current plasma ignition device for coal-fired boiler in power plant - Google Patents
Alternating-current plasma ignition device for coal-fired boiler in power plant Download PDFInfo
- Publication number
- CN202048592U CN202048592U CN2011201566386U CN201120156638U CN202048592U CN 202048592 U CN202048592 U CN 202048592U CN 2011201566386 U CN2011201566386 U CN 2011201566386U CN 201120156638 U CN201120156638 U CN 201120156638U CN 202048592 U CN202048592 U CN 202048592U
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- China
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- coal
- coal dust
- power plant
- plasma ignition
- fired boiler
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Abstract
The utility model discloses an alternating-current plasma ignition device for a coal-fired boiler in a power plant, which solves the technical problem that a large amount of fuel oil is consumed when the existing coal-fired boiler is started and stopped in a fire power plant unit. The alternating-current plasma ignition device comprises a coal-fired boiler (1) that is nested with one end of a three-stage coal dust burning cylinder (2); the other end of the three-stage coal dust burning cylinder (2) is nested with a two-stage coal dust burning cylinder (3); the other end of the two-stage coal dust burning cylinder (3) is nested with a central high-temperature burning cylinder (4); the other end of the central high-temperature burning cylinder (4) is nested with primary coal dust and an air pipe (6); a plasma ignition gun (8) is arranged on the central high-temperature burning cylinder (4); and the plasma ignition gun (8) is connected with a plasma generator (7). The alternating-current plasma ignition device realizes the aim of needing no fuel oil during the startup and shutdown process and stable combustion period of the boiler in the fire power plant, thus further getting rid of the dependency on the fuel oil.
Description
Technical field
The utility model relates to the igniter of a kind of thermal power plant coal-burning boiler.
Background technology
Power industry is the demand rich and influential family of oil, and annual consumption accounts for 30% of China's oil total amount, wherein greatly, is used for opening, stop and low-load combustion-stabilizing of thermal power plant unit, and annual consumption reaches millions of tons.A kind of coal-fired boiler in power plant of on-the-spot urgent need does not need the device of consume fuel oil when start and stop.
Summary of the invention
The utility model provides a kind of coal-fired boiler in power plant AC plasma igniter to solve existing coal-burning boiler in the opening of thermal power plant unit, technical problem that the stopping time need consume great amount of fuel oil.
The utility model overcomes the above problems by following scheme:
This a kind of coal-fired boiler in power plant AC plasma igniter, comprise coal-burning boiler, one end of coal-burning boiler and three grades of coal dust firing tubes connects together, the other end of three grades of coal dust firing tubes and secondary coal dust firing jacket casing are connected together, the other end of secondary coal dust firing tube and center high-temp combustion jacket casing are connected together, the other end of center high-temp combustion tube and coal dust and wind path pipe box are connected together, described center high-temp combustion tube is provided with the isoionic point firelock, and this plasma ignition rifle and plasma generator link together.
Center high-temp combustion tube is provided with surrounding air and combustion air input channel.
Utility model has realized that the thermal power plant need not to drop into fuel oil during boiler start/ stop and steady combustion, and then has broken away from the dependence to fuel oil.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
A kind of coal-fired boiler in power plant AC plasma igniter, comprise coal-burning boiler 1, one end of coal-burning boiler 1 and three grades of coal dust firing tubes 2 connects together, the other end of three grades of coal dust firing tubes 2 and secondary coal dust firing tube 3 connect together, the other end of secondary coal dust firing tube 3 and center high-temp combustion tube 4 connect together, the other end of center high-temp combustion tube 4 and coal dust and wind path pipe 6 connect together, described center high-temp combustion tube 4 is provided with isoionic point firelock 8, and this plasma ignition rifle 8 links together with plasma generator 7.Center high-temp combustion tube 4 is provided with surrounding air and combustion air input channel 5.
Whole plasma ignition system is made up of AC plasma rifle, combustion system, electrical system, monitoring system, compressed air system and cooling water system.
The AC plasma rifle is the device that is used for producing high-temperature plasma electric arc, and it mainly is made up of preceding electrode assemblie, arc initiation device and accessory system three parts, also has Support bracket to cooperate on-the-spot the installation.Plasma generator projected life is 3～5 years.Between two electrodes, add stable big electric current, the formation of the air ionization between the electrode is had high-temperature electric conduction characteristic plasma, and blow out, form utilizable high-temperature electric arc by compressed air.
Plasma burner has adopted the multistage combustion structure, coal dust is at first lighted in central tube, the powder amount that enters central tube can be designed between the 500-1200kg/h according to coal dust characteristic difference, the smooth combustion in central tube of this part coal dust, and form the incendiary source of stable secondary coal dust in the exit of central tube, and amplify step by step in proper order, maximum can be lighted the powder amount of 12T/h.The high-temperature part of plasma burner adopts heat resisting cast steel, and all the other and coal dust contact site adopt high abrasion cast steel.Must correctly select the welding rod model for use when being connected with on-the-spot pipeline.Plasma burner can be divided into two classes by function: 1, only use as start-up burner, this plasma burner is used to replace crude oil burner, plays to start boiler and in the combustion-supporting effect of underload.Adopt this kind burner to be required to be that it is additional to powder system, comprise air pipe line and machine supplying powder; 2, not only used as start-up burner but also as main burner, this plasma burner has and 1 described same function, can be used as the main burner input when boiler normally moves again.Adopt this kind mode not need to lay separately and give powder system.It is identical with former burner that plasma burner and the connected mode of an air pipe line are made, and the retrofit work amount is little.
The plasma generator power-supply system is to be used for producing keeping plasma-arc stable power device.Form by switch cubicle, current-limiting reactor, control PLC etc.
Monitoring system is made up of wall temperature measurement, online detection of primary air, visual flame monitoring and control system.
Compressed air is the medium of AC plasma electric arc, after plasma-arc forms, needs compressed air to blow out electrode with certain flow velocity and could form available electric arc.Therefore, the AC plasma ignition system need be equipped with compressed air system, and compressed-air actuated requirement is clean and is pressure stability.Compressed air piping is provided with Pressure gauge and a pressure switch, pressure is satisfied signal send this burner control system back to.The compressed air pressure of plasma ignition device inlet requires about 0.35-0.5Mpa, and the compressed air require of every AC plasma device is about 1.0NM
3/ min-1.5NM
3/ min.
After AC plasma electric arc formed, the arc column temperature generally arrived the 10000K scope at 5000K, and therefore the electrode for the plasma generator that forms electric arc must cool off by the mode of water-cooled, otherwise very fast meeting is burnt.Sum up cooling effect by a large amount of experimental datas for guaranteeing, need cooling water with high flow velocity by electrode, need therefore to guarantee that AC plasma generator cooling water inlet pressure is not less than the pressure of 0.7MP.In addition, the inlet cooling water temperature should not be higher than 30 ℃, otherwise cooling effect is poor.For reducing the corrosion of cooling water, adopt the desalination chemical water of power plant to electrode.Cooling water system adopts closed circulation system, is made up of cooling water tank, cooling water pump, heat exchanger and valve, Pressure gauge, pipeline, and two of cooling water pumps are standby each other.System's material is stainless steel.Cooling water adopts the desalination chemical water, is that cooling water tank supplies water by water pipe.
Claims (2)
1. coal-fired boiler in power plant AC plasma igniter, comprise coal-burning boiler (1), coal-burning boiler (1) connects together with an end of three grades of coal dust firing tubes (2), the other end of three grades of coal dust firing tubes (2) and secondary coal dust firing tube (3) connect together, the other end of secondary coal dust firing tube (3) and center high-temp combustion tube (4) connect together, the other end of center high-temp combustion tube (4) and coal dust and wind path pipe (6) connect together, it is characterized in that, described center high-temp combustion tube (4) is provided with isoionic point firelock (8), and this plasma ignition rifle (8) links together with plasma generator (7).
2. a kind of coal-fired boiler in power plant AC plasma igniter according to claim 1 is characterized in that center high-temp combustion tube (4) is provided with surrounding air and combustion air input channel (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201566386U CN202048592U (en) | 2011-05-17 | 2011-05-17 | Alternating-current plasma ignition device for coal-fired boiler in power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201566386U CN202048592U (en) | 2011-05-17 | 2011-05-17 | Alternating-current plasma ignition device for coal-fired boiler in power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202048592U true CN202048592U (en) | 2011-11-23 |
Family
ID=44988899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201566386U Expired - Fee Related CN202048592U (en) | 2011-05-17 | 2011-05-17 | Alternating-current plasma ignition device for coal-fired boiler in power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202048592U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105716076A (en) * | 2016-02-05 | 2016-06-29 | 沈阳时代清洁能源科技有限公司 | Electrolysis oxy-hydrogen gas pulverized coal igniting burner |
| CN107246607A (en) * | 2017-07-06 | 2017-10-13 | 山西大学 | A kind of automatic stable burning system for Process In A Tangential Firing |
| CN109798538A (en) * | 2019-03-01 | 2019-05-24 | 黄震 | A kind of plasma ignition device |
| CN110762527A (en) * | 2019-10-17 | 2020-02-07 | 山西大学 | AC plasma-oxygen-enriched ignition burner |
-
2011
- 2011-05-17 CN CN2011201566386U patent/CN202048592U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105716076A (en) * | 2016-02-05 | 2016-06-29 | 沈阳时代清洁能源科技有限公司 | Electrolysis oxy-hydrogen gas pulverized coal igniting burner |
| CN107246607A (en) * | 2017-07-06 | 2017-10-13 | 山西大学 | A kind of automatic stable burning system for Process In A Tangential Firing |
| CN107246607B (en) * | 2017-07-06 | 2023-05-30 | 山西大学 | Automatic stable combustion system for four-corner tangential boiler |
| CN109798538A (en) * | 2019-03-01 | 2019-05-24 | 黄震 | A kind of plasma ignition device |
| CN110762527A (en) * | 2019-10-17 | 2020-02-07 | 山西大学 | AC plasma-oxygen-enriched ignition burner |
| CN110762527B (en) * | 2019-10-17 | 2020-11-06 | 山西大学 | AC plasma-oxygen-enriched ignition burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111123 Termination date: 20150517 |
|
| EXPY | Termination of patent right or utility model |