CN201361518Y - System for reducing pollutant in burning process - Google Patents
System for reducing pollutant in burning process Download PDFInfo
- Publication number
- CN201361518Y CN201361518Y CNU2009200677562U CN200920067756U CN201361518Y CN 201361518 Y CN201361518 Y CN 201361518Y CN U2009200677562 U CNU2009200677562 U CN U2009200677562U CN 200920067756 U CN200920067756 U CN 200920067756U CN 201361518 Y CN201361518 Y CN 201361518Y
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- high speed
- speed spout
- spout
- pollutant
- reducing
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Abstract
The utility model discloses a system for reducing pollutants in the burning process. The system comprises a reaction furnace, at least one set of asymmetric eddy ejection device, and at least one set of absorbent ejection system, wherein the asymmetric eddy ejection device includes an upstream high-speed nozzle and a downstream high-speed nozzle; the upstream high-speed nozzle and the downstream high-speed nozzle are arranged symmetrically in a manner that the reaction furnace serves as the center shaft; and the absorbent ejection system includes a plurality of absorbent ejection ports annularly arranged in the vicinity of the upper part or the lower part of the asymmetric eddy ejection ports. The system for reducing pollutants in the burning process has the advantages that a reasonable structure of a reaction furnace can form sectional combustion therein, so that pollutants in the reaction furnace can react with sufficient absorbent completely, thereby improving the pollutant removal efficiency and greatly reducing the cost.
Description
Technical field
The utility model relates to a kind of emission-reducing system, relates in particular to a kind of system that is used for reducing the pollutant of combustion process.
Background technology
The burning of sulfur-bearing carbonaceous compound (especially coal) causes containing gas after the burning of the sulfur dioxide of high-load unacceptably.
SO
2The minimizing method
Reduce sulfur dioxide (SO
2) be the main concern of energy and Industrial Boiler industry, because acid rain is gaseous state SO
2Be discharged into the product in the environment.In order to prevent acid rain, it is more and more stricter that relevant law becomes, and company is also more and more owing to excessively discharge SO
2And catch a packet.
Sulfur dioxide is a kind of colourless gas, its can the appropriateness water-soluble and liquid, aqueous in.It mainly forms during combustion of sulfur fuel or refuse.In case discharge into the atmosphere, sulfur dioxide reacts at leisure and forms sulfuric acid (H
2SO
4), inorganic sulfate compounds and organic sulfate compound.
The air pollution control system that is used to remove sulfur dioxide is big and complicated, and depends on two kinds of major techniques that are used to remove sulfur dioxide: absorb and absorption.Two kinds of methods all depend on by alkali the sulfur dioxide that is absorbed are neutralized into inorganic salts, are discharged in the environment to prevent sulphur.The most frequent alkali that is used to react comprises: lime stone-calcareous or contain dolomite: quick lime and white lime-slurry or do; And magnesium hydroxide-commercially available and from the accessory substance of sulfo-sorb lime (Thiosorbidime); And trona.
Absorption-absorption is handled and is used the solubility of sulfur dioxide in the aqueous solution that it is removed from air-flow., sulfur dioxide forms sulfurous acid (H in case being dissolved in the solution
2SO
3), its promptly with oxidant reaction to form inorganic sulfite (SO
3-) and sulfate (SO
4-).This process prevents that the sulfur dioxide that is dissolved from diffusing out and being rearranged and puts from solution.Then handle described solution to remove sulphur.
Lime stone is the alkali that is most commonly used to the reaction of the sulfur dioxide that dissolved.Lime white is directed onto in the air-flow that contains sulfur dioxide.Must carefully be controlled at the chemical reaction in recirculation lime white and the product, remove efficient and prevent operational issue so that keep desired sulfur dioxide.The wet scrubber that is used for sulfur dioxide control is operated under the liquid pH level between 5 to 9 usually, removes to keep high efficiency.Typical sulfur dioxide in the wet scrubber removes efficient in 80% to 95% scope.
The absorption system of another type is called as the sprayer dry scrubber, and it belongs to one group of washer that is called as spray-drying type dry scrubber.In the case, the alkalescence slurry is a bit located in particulate control device upstream to be injected in the thermal current.When slurry drips evaporation, sulfur dioxide absorb slurry drip in and the alkali substance reaction that dissolves and suspend with institute.
Big spray dryer chamber be used to guarantee all slurries drop in enter high efficiency particulate control system before evaporation do.Term " dry scrubber " refers to the state of the dried particle that enters the particulate control system.Fabric filter or electrostatic precipitator are generally used for the control of high efficiency particulate.
The efficient of spray-drying type absorption system is similar to the efficient of wet scrubbing type absorption system.These spray-drying type absorption systems produce dry waste stream and therefore handle easily than the mud that produces in the wet type washer.Yet the equipment of the alkalescence slurry that is used to atomize is complicated and the much more maintenance of comparable wet scrubber system's needs.Compare with wet scrubber, spray-drying type absorption system is operated under higher gas temperature, and lower for the validity that removes other pollutant (for example, coagulable particle matter) in the air-flow.
Selection between wet scrubber absorption system and the spray dryer absorption system depends primarily on the place special cost.The selection that can be used for the environment-friendly type processing of refuse also is to be the significant consideration in the application-specific selective system type.Two types system can both provide high efficiency sulfur dioxide to remove.The installation of two types system, operation and maintenance also all are expensive.
Adsorbing a sulfur dioxide also can be collected by adsorption system.In the control system of this type, dried alkaline powder is injected in the air-flow.Sulfur dioxide is adsorbed onto the alkali grain surface and reaction forms the precipitable compound that leaves air-flow.White lime (calcium hydroxide) is the most frequently used alkali; Yet, also can use multiple alkali effectively.Can on than mini system, use dry-spray type dry scrubber, and be not to use big complicated spray-drying type dry scrubber.Yet the efficient of dry-type jetting system is lower slightly, and the sulfur dioxide (or other sour gas) of collection per unit needs more alkali.Therefore, compare with absorption system, waste disposal requirement and cost are higher for adsorption system.
In general, the prior art adsorption method is expensive, because it needs expensive equipment (comprising bag house and electrostatic precipitator); Efficient is lower in alkali utilization rate and sulphur minimizing; And need special the maintenance, because injector is easy to stop up.
Therefore, prior art SO
2Absorption and adsorption system and method have costliness and/or inefficient shortcoming.Therefore, need a kind of SO
2Removal system and method produce easy-to-handle accessory substance, realize removing sulphur more than 70% with high adsorbent utilization rate from waste gas, and reduce equipment and require (and cost).
Be used to reduce the interior sorbent injection (FSI) of stove of SOx
Other pollutant (SO for example
3, Hg, HCI, NOx and PM) also remove from the burning effluent by sorbent injection (FSI) in the stove.Yet the execution of art methods that is used to remove these pollutants is also inefficient relatively and comparatively expensive.
ROFA
The rotation burnt wind (ROFA) that liquidates utilizes collaborative, the enhancing of high speed secondary wind, peripheral jet to come turbulization to mix, thereby cause reducing (as shown below) to obtain big NOx than high burning efficiency, for example give the United States Patent (USP) 5 of Svendssen on September 22nd, 1998,809, teaching in 910, described patent is described a kind of ROFA system, and it provided the asymmetric injection of combustion wind (OFA) so that produce rotation and high turbulent flow in stove, thereby more up hill and dale secondary wind was mixed with burning gases.ROFA is applied in the prior art in the combustion furnace and only is used to reduce NOx and SO
3
Generally speaking, though the use of firing wind is crossed in known acceleration in affiliated art, teaching or disclose it and be used in combination with the fuel sorbent injection not in the prior art to obtain efficiently pollutants removal rate and to make cost reduce greatly.Therefore, need some system and methods, it is used for reducing pollutant levels in the waste gas in combustion of sulfur fossil fuel and the combustion process of utilizing high turbulent flow to cross the combustion wind system.
Summary of the invention
The purpose of this utility model provides a kind of system that is used for reducing the pollutant of combustion process, by appropriate design reacting furnace structure, its reacting furnace is inner to form sectional combustion, and fully reacts with abundant adsorbent, has improved pollutants removal rate and has made cost reduce greatly.
In order to achieve the above object, a kind of system that is used for reducing the pollutant of combustion process that the utility model provides, comprise a reacting furnace, it also comprises: at least one group of asymmetric vortex knockout device, described asymmetric vortex knockout device comprises a upstream high speed spout and a downstream high speed spout, and described upstream high speed spout and downstream high speed spout are that central shaft is symmetrical arranged according to reacting furnace; At least one group of sorbent injection system comprises several sorbent injection mouths, and annular is arranged near the top or bottom of described asymmetric eddy effusion mouth.
Preferably, described upstream high speed spout parallels with the injection direction of downstream high speed spout, and the height spacing of described upstream high speed spout and downstream high speed spout equals the maximum gauge of the reacting furnace between upstream high speed spout and the downstream high speed spout.
Preferably, comprise more than or equal to two groups of asymmetric vortex knockout device, distance between the described asymmetric vortex knockout device is less than the maximum gauge of the reacting furnace between every group of upstream high speed spout and the downstream high speed spout, greater than half of the maximum gauge of the reacting furnace between every group of upstream high speed spout and the downstream high speed spout.
Preferably, the upstream high speed spout of described every group of asymmetric vortex knockout device all is arranged on the straight line that is parallel to the reacting furnace length direction, and the downstream high speed spout of every group of asymmetric vortex knockout device all is arranged on another straight line that is parallel to the reacting furnace length direction.
Preferably, described upstream high speed spout is identical with the bore of downstream high speed spout.
Preferably, the jet velocity difference of described every group of asymmetric vortex knockout device.
Preferably, described sorbent injection system is arranged on two groups of two groups of adjacent asymmetric vortex knockout device intermediate altitudes.
Preferably, described sorbent injection system is separately positioned on the same position of upstream high speed spout and downstream high speed spout.
A kind of system that is used for reducing the pollutant of combustion process of the present utility model, by appropriate design reacting furnace structure, its reacting furnace is inner to form sectional combustion, and fully reacts with abundant adsorbent, has improved pollutants removal rate and has made cost reduce greatly.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.
In the accompanying drawings:
Fig. 1 is the structural representation of the utility model embodiment 1.
Fig. 2 is the structural representation of the utility model embodiment 2.
Drawing reference numeral:
| [1] upstream high speed spout | [2] downstream high speed spout |
| [3] sorbent injection mouth | [4] reacting furnace |
The specific embodiment
Specifically introduce a kind of preferred embodiment of the present utility model below in conjunction with accompanying drawing 1,2.
As shown in Figure 1, a kind of system that is used for reducing the pollutant of combustion process of the present utility model, comprise reacting furnace 4, be used for the combustion of sulfur carbonaceous compound, with three groups of asymmetric vortex knockout device, described asymmetric vortex knockout device comprises upstream high speed spout 1 and downstream high speed spout 2, and described upstream high speed spout 1 is symmetrical arranged for central shaft according to reacting furnace 4 with downstream high speed spout 2.Described upstream high speed spout 1 parallels with the injection direction of downstream high speed spout 2, and the height spacing of described upstream high speed spout 1 and downstream high speed spout 2 equals the maximum gauge of the reacting furnace between upstream high speed spout 1 and the downstream high speed spout 2.Distance between the described asymmetric vortex knockout device is less than the maximum gauge of the reacting furnace between every group of upstream high speed spout 1 and the downstream high speed spout 2, greater than half of the maximum gauge of the reacting furnace between every group of upstream high speed spout and the downstream high speed spout.The upstream high speed spout 1 of described every group of asymmetric vortex knockout device all is arranged on the straight line that is parallel to reacting furnace 4 length directions, and the downstream high speed spout 2 of every group of asymmetric vortex knockout device all is arranged on another straight line that is parallel to reacting furnace 4 length directions.Described upstream high speed spout 1 is identical with the bore of downstream high speed spout 2.The jet velocity difference of described every group of asymmetric vortex knockout device.
Two groups of sorbent injection system comprise 8 sorbent injection mouths 3, and described sorbent injection system annular is arranged on two groups of two groups of adjacent asymmetric vortex knockout device intermediate altitudes.
By the high-speed gas that sprays in upstream high speed spout 1 and the downstream high speed spout 2, reacting furnace 4 has formed A and two air of B revolve, reaction speed is accelerated greatly, fully burning, simultaneously sorbent injection system has effectively been adsorbed the toxic and harmful that produces in the burning at intersection's ejection adsorbent that A and two air of B revolve.
In the foregoing description, use particle diameter to compare with original device as the utility model of adsorbent less than 6 microns trona with particle diameter less than 74 microns lime stone respectively, it is as follows that pollutant reduces the percentage test result:
| Pollutant % reduces | Lime stone sprays | Trona sprays |
| SO 2 | 64％ | 69％ |
| SO 3 | 90％ | 90％ |
| HCL | 0％ | 75％ |
| Mercury | 89％ | 67％ |
| NO X | 4％ | 11％ |
| PM | 18％ | 80％ |
As shown in Figure 2, a kind of system that is used for reducing the pollutant of combustion process of the present utility model, comprise reacting furnace 4, be used for the combustion of sulfur carbonaceous compound, with two groups of asymmetric vortex knockout device, described asymmetric vortex knockout device comprises upstream high speed spout 1 and downstream high speed spout 2, and described upstream high speed spout 1 is symmetrical arranged for central shaft according to reacting furnace 4 with downstream high speed spout 2.Described upstream high speed spout 1 parallels with the injection direction of downstream high speed spout 2, and the height spacing of described upstream high speed spout 1 and downstream high speed spout 2 equals the maximum gauge of the reacting furnace between upstream high speed spout 1 and the downstream high speed spout 2.Distance between the described asymmetric vortex knockout device is less than the maximum gauge of the reacting furnace between every group of upstream high speed spout 1 and the downstream high speed spout 2, greater than half of the maximum gauge of the reacting furnace between every group of upstream high speed spout and the downstream high speed spout.The upstream high speed spout 1 of described every group of asymmetric vortex knockout device all is arranged on the straight line that is parallel to reacting furnace 4 length directions, and the downstream high speed spout 2 of every group of asymmetric vortex knockout device all is arranged on another straight line that is parallel to reacting furnace 4 length directions.Described upstream high speed spout 1 is identical with the bore of downstream high speed spout 2.The jet velocity difference of described every group of asymmetric vortex knockout device.
Two groups of sorbent injection system comprise 8 sorbent injection mouths 3, and described sorbent injection system annular is arranged on two groups of adjacent asymmetric vortex knockout device intermediate altitudes.
By the high-speed gas that sprays in upstream high speed spout 1 and the downstream high speed spout 2, reacting furnace 4 has formed A, B and three air of C revolve, reaction speed is accelerated greatly, fully burning, simultaneously sorbent injection system has effectively been adsorbed the toxic and harmful that produces in the burning at intersection's ejection adsorbent that A, B and three air of C revolve.
In the foregoing description, use particle diameter to compare with original device as the utility model of adsorbent less than 5 microns trona with particle diameter less than 67 microns lime stone respectively, it is as follows that pollutant reduces the percentage test result:
| Pollutant % reduces | Lime stone sprays | Trona sprays |
| SO 2 | 74％ | 73％ |
| SO 3 | 98％ | 97％ |
| HCL | 0％ | 86％ |
| Mercury | 92％ | 72％ |
| NO X | 7％ | 18％ |
| PM | 24％ | 90％ |
Should be noted that at last: above embodiment only is not intended to limit in order to the explanation the technical solution of the utility model; Although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present utility model; And not breaking away from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (8)
1. a system that is used for reducing the pollutant of combustion process comprises a reacting furnace (4), it is characterized in that also comprising:
At least one group of asymmetric vortex knockout device, described asymmetric vortex knockout device comprises a upstream high speed spout (1) and a downstream high speed spout (2), and described upstream high speed spout (1) is symmetrical arranged for central shaft according to reacting furnace (4) with downstream high speed spout (2);
At least one group of sorbent injection system comprises several sorbent injection mouths (3), and annular is arranged near the top or bottom of described asymmetric eddy effusion mouth.
2. the system that is used for reducing the pollutant of combustion process as claimed in claim 1, it is characterized in that: described upstream high speed spout (1) parallels with the injection direction of downstream high speed spout (2), and the height spacing of described upstream high speed spout (1) and downstream high speed spout (2) equals the maximum gauge of the reacting furnace between upstream high speed spout (1) and the downstream high speed spout (2).
3. the system that is used for reducing the pollutant of combustion process as claimed in claim 2, it is characterized in that: comprise more than or equal to two groups of asymmetric vortex knockout device, distance between the described asymmetric vortex knockout device is less than the maximum gauge of the reacting furnace between every group of upstream high speed spout (1) and the downstream high speed spout (2), greater than half of the maximum gauge of the reacting furnace between every group of upstream high speed spout and the downstream high speed spout.
4. the system that is used for reducing the pollutant of combustion process as claimed in claim 3, it is characterized in that: the upstream high speed spout (1) of described every group of asymmetric vortex knockout device all is arranged on the straight line that is parallel to reacting furnace (4) length direction, and the downstream high speed spout (2) of every group of asymmetric vortex knockout device all is arranged on another straight line that is parallel to reacting furnace (4) length direction.
5. the system that is used for reducing the pollutant of combustion process as claimed in claim 4, it is characterized in that: described upstream high speed spout (1) is identical with the bore of downstream high speed spout (2).
6. the system that is used for reducing the pollutant of combustion process as claimed in claim 5 is characterized in that: the jet velocity difference of described every group of asymmetric vortex knockout device.
7. the system that is used for reducing the pollutant of combustion process as claimed in claim 6, it is characterized in that: described sorbent injection system is arranged on two groups of two groups of adjacent asymmetric vortex knockout device intermediate altitudes.
8. the system that is used for reducing the pollutant of combustion process as claimed in claim 6, it is characterized in that: described sorbent injection system is separately positioned on the same position of upstream high speed spout (1) and downstream high speed spout (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200677562U CN201361518Y (en) | 2009-02-17 | 2009-02-17 | System for reducing pollutant in burning process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200677562U CN201361518Y (en) | 2009-02-17 | 2009-02-17 | System for reducing pollutant in burning process |
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| Publication Number | Publication Date |
|---|---|
| CN201361518Y true CN201361518Y (en) | 2009-12-16 |
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ID=41472177
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|---|---|---|---|
| CNU2009200677562U Expired - Fee Related CN201361518Y (en) | 2009-02-17 | 2009-02-17 | System for reducing pollutant in burning process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672940A (en) * | 2014-01-08 | 2014-03-26 | 上海卫源节能环保科技有限公司 | Method for reducing nitrogen oxide generated by combustion of boiler |
-
2009
- 2009-02-17 CN CNU2009200677562U patent/CN201361518Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672940A (en) * | 2014-01-08 | 2014-03-26 | 上海卫源节能环保科技有限公司 | Method for reducing nitrogen oxide generated by combustion of boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091216 Termination date: 20120217 |