CN204460201U - A kind of high-power adjustable pulverized-coal fired boiler plasma ignition device - Google Patents
A kind of high-power adjustable pulverized-coal fired boiler plasma ignition device Download PDFInfo
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- CN204460201U CN204460201U CN201420870439.5U CN201420870439U CN204460201U CN 204460201 U CN204460201 U CN 204460201U CN 201420870439 U CN201420870439 U CN 201420870439U CN 204460201 U CN204460201 U CN 204460201U
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Abstract
The utility model discloses a kind of high-power adjustable pulverized-coal fired boiler plasma ignition device, comprise the plasma gun, power supply, anode and cathode circulating cooling water path structure, compressed air access structure and the coal burner that are provided with anodic-cathodic; Coal burner is the burning structure being step by step provided with light-dark separation device; plasma gun is placed in coal burner center; the power supply with rectification and high-frequency arc strike function is connected on the anodic-cathodic of plasma gun; anode and cathode circulating cooling water path structure provides cooling protection for anodic-cathodic, and compressed air access structure provides working media gas for plasma gun.The utility model had both solved the problems such as traditional grease gun igniting highly energy-consuming, high pollution, high cost, expanded again the advantage of direct current plasma firing technique in firing temperature, technical performance, the scope of application etc.
Description
Technical field
The utility model relates to a kind of high-power adjustable pulverized-coal fired boiler plasma ignition device, to adapt to the high-power adjustable Plasma Firing Technology of Coal rank.
Background technology
Power industry is consumption of petroleum rich and influential family, wherein be used for greatly the opening of thermal power plant unit, stop and low-load combustion-stabilizing, therefore apply fuel-saving technique to carry out the opening of boiler controller system, stop and low-load combustion-stabilizing, optimize the energy consumption structure of China, to national economy sustainable development, there is important strategic importance.
For a long time, a large amount of fuel oil is consumed during the start and stop of thermal power generation unit boiler and low-load combustion-stabilizing, particularly for newly-built thermal power generation unit, it will through many stages such as boiler blow piping, steam turbine red switch, set grid-connection, electrical test, unit band large load operations at During Trail Operation, mill cannot be thrown due to boiler during this or cannot run by oil-break completely, therefore wanting the fuel oil of at substantial.Pulverized-coal fired boiler Plasma Firing Technology is exactly the fuel-saving technique produced under energy-saving and cost-reducing Policy Background, this technology is for the actual conditions of coal-burning boiler at substantial fuel oil when start and stop and steady combustion of China's industry such as major part electric power, metallurgy, petrochemical industry etc., by the transformation to boiler-burner, without the need to throwing oil during boiler start/ stop and steady combustion, thus thoroughly break away from the dependence to fuel oil.
But plasma ignition device form is single in the market, arc power adjustable range is very narrow, be generally 100 ± 20KW, adapt to coal dust category limited, the coal ignition conditions higher for the volatile matter such as bituminous coal, brown coal is better, and for the comparatively difficult point combustion such as meager coal of inferior quality; And on market, electric arc plasma ignition device is mostly the IGCT silicon controlled rectification power source and the mechanical contact starting the arc mode that adopt complex structure, complex operation now, belong to previous generation technology, control rate is slow, easy contaminated electrode, ignition success rate is on the low side, and electrode life is low.Therefore, Plasma Firing Technology field overcomes these technology barriers in the urgent need to the high-power adjustable plasma ignition spray gun of a new generation.
Utility model content
Technical problem to be solved in the utility model: for overcoming the deficiencies in the prior art, a kind of high-power adjustable pulverized-coal fired boiler plasma ignition device is provided, substitute traditional grease gun igniting and common plasma ignition, realize spray gun power continuously adjustabe and match with variety classes coal dust and burner, providing support for when smooth ignition during boiler startup or low-load combustion-stabilizing.
Technical solution of the present utility model: a kind of high-power adjustable pulverized-coal fired boiler plasma ignition device, comprises the plasma gun, power supply, anode and cathode circulating cooling water path structure, compressed air access structure and the coal burner that are provided with anodic-cathodic;
Coal burner is the burning structure being step by step provided with light-dark separation device; plasma gun is placed in coal burner center; the power supply with rectification and high-frequency arc strike function is connected on the anodic-cathodic of plasma gun; anode and cathode circulating cooling water path structure provides cooling protection for anodic-cathodic; its pipeline is provided with temperature and pressure detecting and filter; compressed air access structure provides working media gas for plasma gun, its pipeline is provided with pressure, flow and filter.
Described plasma gun comprises spray gun urceolus, spray gun inner core, main inlet channel and electrode assemblie, the inside and outside cylinder of described spray gun is hollow cylinder structure, spray gun urceolus is placed on spray gun inner tank theca, spray gun outer tube wall being provided with cooling of electrode water access way, is main inlet channel between spray gun urceolus and spray gun inner core;
Electrode assemblie comprises anode, field coil and negative electrode, its Anodic is placed in spray gun inner core, for the hollow cylinder structure that one end is closed, be additional-air inlet room near cavity one end of blind end place anode, sealing surface is provided with is convenient to the hole that gas flows into additional-air inlet room; Negative electrode is hollow cylinder structure, its one end is placed in spray gun inner core, the other end is placed in spray gun urceolus, cathode cavity one end coordinates with the anode cavity other end and forms primary induction chamber, primary induction chamber's outer wall is provided with through hole, being convenient to gas enters in primary induction chamber by main inlet channel by spray gun inner core, and the other end of cathode cavity coordinates with spray gun urceolus and forms nozzle, and the outside of negative electrode and anode is all wound with field coil.
Described negative electrode and anode are on same axis.
The utility model advantage compared with prior art:
(1) the utility model had both solved the problems such as traditional grease gun igniting highly energy-consuming, high pollution, high cost, expanded again the advantage of direct current plasma firing technique in firing temperature, technical performance, the scope of application etc.
(2) the utility model can solve the difficult problem of igniting of the low-volatile coal such as anthracite and meager coal product well.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the utility model plasma gun structural representation.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
High powered plasma firing technique is exactly in energy-saving and cost-reducing policy and a technology producing under solving the background of previous generation Plasma Firing Technology short slab.High powered plasma igniting uses the direct firing coal-dust of plasma torch, use pulverized coal flame starting trouble, reach the object of replace oil with coal, and high-power adjustable Plasma Firing Technology expands the advantage of direct current plasma firing technique in firing temperature, technical performance, the coal dust scope of application etc., there is the advantages such as system is simple, electrode life long, repair and maintenance amount is little, coal adaptability scope is wide.The adjustable Plasma Firing Technology of utilizing high power is carried out the opening of boiler controller system, is stopped and low-load combustion-stabilizing, and optimize the energy consumption structure of China, have important strategic importance to national economy sustainable development, arc power adjustable range is wide, can expand to 500KW.
As shown in Figure 1, the high-power adjustable pulverized-coal fired boiler plasma ignition device of one of the present utility model, comprise the plasma gun 10, the power supply 11 that are provided with anodic-cathodic, anode and cathode circulating cooling water path structure 12, compressed air access structure 13 and coal burner 14;
Coal burner 14 is for being provided with the burning structure step by step of light-dark separation device; plasma gun 10 is placed in coal burner 4 center; the power supply 1 with rectification and high-frequency arc strike function is connected on the anodic-cathodic of plasma gun 5; anode and cathode circulating cooling water path structure 2 provides cooling protection for anodic-cathodic; its pipeline is provided with temperature and pressure detecting and filter; compressed air access structure 13 provides working media gas for plasma gun 5, its pipeline is provided with pressure, flow and filter.
As shown in Figure 2, plasma gun 10 comprises spray gun urceolus 7, spray gun inner core 8, main inlet channel 9 and electrode assemblie, the inside and outside cylinder of described spray gun is hollow cylinder structure, conveniently coil winding and formed gas chamber, not etc., spray gun urceolus 7 is not placed on spray gun inner core 8 outer wall cylindricality face size, spray gun urceolus 7 wall is provided with cooling of electrode water access way, its flow direction as shown by the arrows in Figure 1, is main inlet channel 9 between spray gun urceolus 7 and spray gun inner core 8;
Electrode assemblie comprises anode 1, field coil 2 and negative electrode 3, its Anodic 1 is placed in spray gun inner core 8, for the hollow cylinder structure that one end is closed, be additional-air inlet room 5 near cavity one end of blind end place anode 1, sealing surface is provided with is convenient to the hole that gas flows into additional-air inlet room 5; Negative electrode 3 is hollow cylinder structure, its one end is placed in spray gun inner core 8, the other end is placed in spray gun urceolus 7, negative electrode 3 cavity one end coordinates with the anode 1 cavity other end and forms primary induction chamber 6, primary induction chamber 6 outer wall is provided with through hole, being convenient to gas enters in primary induction chamber 6 by main inlet channel 9 by spray gun inner core 8, the primary induction chamber 6 of work gas of the present utility model respectively between anode 1 and negative electrode 3 rotates injection with the additional-air inlet room 5 of anode afterbody with identical tangential direction passing hole, and Fig. 1 dotted line is expressed as the distribution of gas.
The other end of negative electrode 3 coordinates with spray gun urceolus 7 and forms nozzle 4, the outside of negative electrode 3 and anode 1 is all wound with field coil 2, negative electrode 3 and anode 1 are on same axis, high-temperature plasma arc channel is formed in yin, yang electrode interior, with the rotation of accelerating anode 1 and negative electrode 3 internal arc arc root, to compress, stable and regulate electric arc arc column.
Anode 1, negative electrode 3, nozzle 4 all adopt anti-oxidant Cu alloy material to process, inner surface scribbles noble metal ORC material, and in use procedure, the loss of electrode own is little, even if use in an oxidizing environment, also can obtain longer service life, working service cost is low.
Operation principle of the present utility model is such: the coal dust ground through coal pulverizer enters the burner lighting multistage combustion step by step with First air, after air-coal separating, dense phase pulverized coal enters plasma flame center---burner centre cylinder (I grade of burning).Pulverized coal particle was by " core band " being subject to high temperature action, 10
-3light rapidly in second, and discharge fugitive constituent, centered by light phase coal dust (now becoming thick coal culm) around cylinder after secondary concentration high temperature heat source is provided, light phase coal dust is made also to burn (II grade of burning) rapidly, to the whole after-flame of all coal dusts of burner be flowed through at burner outlet place, form stable burning torch.
Compared with existing plasma ignition product, there is unique technical advantage:
On the one hand, the adjustable range of existing main flow plasma gun product is narrower in the market, and arc power range of operation only has between 50-200KW, and coal product accommodation is narrow, low volatile coal product ignition difficulties or can not successful ignition.What existing product ubiquity one was main is also very serious problem, and that is exactly that the coal product of existing product to the low-volatile such as anthracite and meager coal also exist ignition difficulties or can not the problem of successful ignition, greatly limit applying of this series products.The plasma ignition product that the electric power enterprise even had just has been installed, but because the change of coal product causes this product not realize normal ignition, has to the equipment Removal just installed again to recover former grease gun igniting.Picture domestic electrical enterprise, coal product quality often changes, and same igniting product needed adapts to different coal product quality requirements, so it is also proposed high requirement to igniting product.High-power adjustable plasma ignition can overcome these difficulties, can solve the difficult problem (how solving) of igniting of the low-volatile coal such as anthracite and meager coal product well.
On the other hand, compared with previous generation product, high powered plasma igniting spray gun adopts the big-power rectification power supply of IGBT pattern of new generation to instead of IGCT silicon controlled rectification power source, and adopt high frequency control technology to realize the one-touch high frequency starting the arc, speed is fast, precision is high, efficiency is high, simple and fast, the high damage avoided to electrode in arcing process of success rate, extends spray gun service life.
Because the power of high powered plasma burner increases, the diameter of plasma torch and length are all reached significantly increase, thus add contact, the heat-exchange time of coal dust and high power plasma, contribute to the burning accelerating coal dust, greatly reduce the fire ignition energy impelled required for coal dust firing.In addition, plasma is for the effect of coal dust, and than the fugitive constituent improving 20% ~ 80% under normal circumstances, namely plasma reproduces the effect of fugitive constituent, and this has special meaning to lighting low-volatile coal powder strengthening and burning.Further, for variety classes coal dust, by regulating the parameters such as plasma gun power, pulverized-coal concentration, wind speed, the optimized ignition scheme of variety classes coal dust can be realized.
The unexposed technology of the utility model belongs to general knowledge as well known to those skilled in the art.
Claims (4)
1. a high-power adjustable pulverized-coal fired boiler plasma ignition device, it is characterized in that, comprise the plasma gun (10), power supply (11), anode and cathode circulating cooling water path structure (12), compressed air access structure (13) and the coal burner (14) that are provided with anodic-cathodic;
Coal burner (14) is for being provided with the burning structure step by step of light-dark separation device, plasma gun (10) is placed in coal burner (14) center, the power supply (11) with rectification and high-frequency arc strike function is connected on the anodic-cathodic of plasma gun (10), anode and cathode circulating cooling water path structure (12) provides cooling protection for anodic-cathodic, its pipeline is provided with temperature and pressure detecting and filter, compressed air access structure (13) provides working media gas for plasma gun (10), its pipeline is provided with pressure, flow and filter.
2. a kind of high-power adjustable pulverized-coal fired boiler plasma ignition device as claimed in claim 1, it is characterized in that, described plasma gun (10) comprises spray gun urceolus (7), spray gun inner core (8), main inlet channel (9) and electrode assemblie, the inside and outside cylinder of described spray gun is hollow cylinder structure, spray gun urceolus (7) is placed on spray gun inner core (8) outer wall, spray gun urceolus (7) wall being provided with cooling of electrode water access way, is main inlet channel (9) between spray gun urceolus (7) and spray gun inner core (8).
3. a kind of high-power adjustable pulverized-coal fired boiler plasma ignition device as claimed in claim 2, it is characterized in that, described electrode assemblie comprises anode (1), field coil (2) and negative electrode (3), its Anodic (1) is placed in spray gun inner core (8), for the hollow cylinder structure that one end is closed, the cavity one end at close blind end place anode (1) is additional-air inlet room (5), and sealing surface is provided with is convenient to the hole that gas flows into additional-air inlet room (5), negative electrode (3) is hollow cylinder structure, its one end is placed in spray gun inner core (8), the other end is placed in spray gun urceolus (7), negative electrode (3) cavity one end coordinates with anode (1) the cavity other end and forms primary induction chamber (6), primary induction chamber (6) outer wall is provided with through hole, being convenient to gas enters in primary induction chamber (6) by main inlet channel (9) by spray gun inner core (8), the other end of negative electrode (3) cavity coordinates with spray gun urceolus (7) and forms nozzle (4), the outside of negative electrode (3) and anode (1) is all wound with field coil (2).
4. a kind of high-power adjustable pulverized-coal fired boiler plasma ignition device as claimed in claim 3, it is characterized in that, described negative electrode (3) and anode (1) are on same axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420870439.5U CN204460201U (en) | 2014-12-31 | 2014-12-31 | A kind of high-power adjustable pulverized-coal fired boiler plasma ignition device |
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| CN201420870439.5U CN204460201U (en) | 2014-12-31 | 2014-12-31 | A kind of high-power adjustable pulverized-coal fired boiler plasma ignition device |
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| CN204460201U true CN204460201U (en) | 2015-07-08 |
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| CN201420870439.5U Expired - Fee Related CN204460201U (en) | 2014-12-31 | 2014-12-31 | A kind of high-power adjustable pulverized-coal fired boiler plasma ignition device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105376922A (en) * | 2015-12-10 | 2016-03-02 | 北京航天益森风洞工程技术有限公司 | Plasma spray torch equipment with automatic gas adjustment function and adjustment method for plasma spray torch equipment |
| CN106304601A (en) * | 2016-09-29 | 2017-01-04 | 成都真火科技有限公司 | A kind of flame passes flow-generator |
-
2014
- 2014-12-31 CN CN201420870439.5U patent/CN204460201U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105376922A (en) * | 2015-12-10 | 2016-03-02 | 北京航天益森风洞工程技术有限公司 | Plasma spray torch equipment with automatic gas adjustment function and adjustment method for plasma spray torch equipment |
| CN105376922B (en) * | 2015-12-10 | 2018-02-13 | 北京航天益森风洞工程技术有限公司 | The plasma gun equipment and its adjusting method of realizing automatic regulation of gas |
| CN106304601A (en) * | 2016-09-29 | 2017-01-04 | 成都真火科技有限公司 | A kind of flame passes flow-generator |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20161231 |