CN102688686A - Waste incineration flue gas dedusting, catalyzing and denitrification reaction device - Google Patents
Waste incineration flue gas dedusting, catalyzing and denitrification reaction device Download PDFInfo
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- CN102688686A CN102688686A CN2011103813325A CN201110381332A CN102688686A CN 102688686 A CN102688686 A CN 102688686A CN 2011103813325 A CN2011103813325 A CN 2011103813325A CN 201110381332 A CN201110381332 A CN 201110381332A CN 102688686 A CN102688686 A CN 102688686A
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Abstract
The invention relates to a waste incineration flue gas dedusting, catalyzing and denitrification reaction device which comprises a shell, wherein the lower end of the shell is provided with a flue gas inlet, and the upper end of the shell is provided with a clean flue gas outlet; a gas flow channel is arranged between the flue gas inlet and the clean flue gas outlet in the shell; the gas inlet part is provided with a preheating unit; the gas flow channel is internally provided with a catalyzing reaction unit and a particulate matter removing device from top to bottom sequentially; the particulate matter removing device comprises a dedusting seat and a dedusting pipe; the dedusting seat is of a cylindrical shape with an open upper end and a closed lower end; the upper end and the lower end of the dedusting pipe are both of open structures, and the outer wall surface of the upper end of the dedusting pipe is matched with the inner wall surface of the shell in a seal mode; the lower end of the dedusting pipe is inserted into the dedusting seat, and the lower end surface of the dedusting pipe is in clearance fit with the dedusting seat; and the inner wall surface of the upper end of the dedusting seat is in clearance fit with the outer wall surface of the dedusting pipe. The problem that the service life of the existing dedusting device for the denitrification reaction device is short is solved.
Description
Technical field
The present invention relates to smoke pollution control field, especially a kind of flue gas of refuse burning dedusting catalytic denitration reaction unit that is applicable to garbage power plant, castoff burning power plant and coal-burning power plant.
Background technology
Along with rapid development of economy, the problem that resource-constrained, ecological deterioration and population growth are brought becomes increasingly conspicuous, rationally, clean and utilize Limited resources to become most important efficiently.The burning city domestic garbage technology is a kind of efficient treatment technology, for compost treatment and chemical treatment, but this technology have innoxious thoroughly, subtract the remarkable resource utilization degree advantages of higher of appearanceizations.But; Limitation owing to operating procedure in the burning process very easily causes secondary pollution; Wherein the NOx pollutant in the incineration flue gas is the most direct, influence is remarkable, and this pollutant not only is detrimental to health, and can cause serious secondary pollution to atmosphere, soil and underground water.If effectively do not control and administer, will cause very serious pollution and destruction to environment, destroy human beings'health and existence directly or indirectly.Carry out effective improvement of NOx in this type incineration flue gas, become current environment and administered one of significant problem of being badly in need of solution.
But garbage burning factory is the same with power plants such as fire coal, fuel oils, and the flue gas that enters in the atmospheric environment also can contain a certain amount of soot dust granule thing, HCl, HF, SO2 and atmosphere pollutions such as NOx sour gas and dioxin.To this; House refuse power plant all designs and gas cleaning facilities such as depickling reaction tower, sack cleaner is installed at afterbody, has successfully controlled flue dust, particle and ease of solubility sour gas, but the NOx nitrogen oxide in the flue gas; Because the overwhelming majority is NO; Not soluble in water, can not effectively remove through existing denitrification apparatus, cause the high concentration discharging.
Application number is that 201110121309.2 one Chinese patent application discloses a kind of sinter fume denitrating system without the ammonia reducing agent; This denitrating system comprises heater, Benitration reactor and the deduster that connects successively, is provided with catalytic bed in the described Benitration reactor.In the course of the work, flue gas at first through described heater heating, passes through described Benitration reactor and deduster then successively, thereby accomplishes dedusting and denitration to flue gas.Though above-mentioned sinter fume denitrating system without the ammonia reducing agent has solved the problem of the water-fast nitrogen oxide high concentration discharging in the flue gas to a certain extent, in use still there is following problem in it; 1) in use; Through the flue gas of said heater because flow velocity, apart from the differences such as distance of heater; Therefore the inequality of being heated at the heater place; And temperature is a vital condition of catalytic reaction, so flue gas is preheating the uneven denitration efficiency that has directly reduced Benitration reactor of being heated of place, unit; 2) described Benitration reactor adopts general fluidizing reactor, though compare the on-line replacing that has realized the reaction bed material with fixed bed type reactor, in the higher occasion of flue gas discharge capacity; Its operating efficiency is low; Specifically, promptly be arranged at reaction bed stockpile on the fluid bed long-pending blocked up and little with the contact area of flue gas, time of contact short, on the other hand; Pile up blocked up reaction bed stockpile and actively be prone to be worn and react not exclusively, this has then caused the waste to the reaction bed material; 3) because described deduster is located at described Benitration reactor downstream; Benitration reactor in work the time is and the smoke reaction that contains dust, influenced the reaction efficiency of reaction bed material, aggravated the wearing and tearing of reaction bed material simultaneously; Caused the waste of reaction bed material; In addition, the irregular Benitration reactor that flows to of flue gas after said heater heating, the air-flow of irregular distribution has reduced the reaction efficiency of reaction bed material from another point of view; 4) described dust arrester adopts traditional fiber bag precipitator; It causes the life-span of resistance and operate as normal short to the mobile of flue gas; Need often to change, the maintenance cost that this has then increased the denitration reaction tower has on the one hand shortened operate as normal cycle of denitration reaction tower on the other hand.
Summary of the invention
The object of the present invention is to provide a kind of flue gas of refuse burning dedusting catalytic denitration reaction unit, with short problem in the service life of the deduster that solves existing denitration reaction.
In order to address the above problem; Said flue gas of refuse burning dedusting catalytic denitration reaction unit adopts following technical scheme: a kind of flue gas of refuse burning dedusting catalytic denitration reaction unit; Comprise housing, the lower end of said housing is provided with gas approach, and the upper end is provided with the clean flue gas outlet; Between its gas approach and clean flue gas outlet, be provided with gas channel in the housing; Said smoke inlet place is provided with and preheats the unit, is provided with catalytic reaction unit and particulate matter removing device in the said gas channel from top to bottom successively, and said particulate matter removing device comprises dedusting seat and dust removing tube; Said dedusting seat is the tubular of open upper end, following end closure; The upper/lower terminal of said dust removing tube is the hatch frame and the outside wall surface of its upper end and the internal face of housing and is sealed and matched, and the lower end of dust removing tube is inserted in the dedusting seat and its lower surface and dedusting seat matched in clearance, the upper end internal face of dedusting seat and the outside wall surface matched in clearance of dust removing tube.
The separated screen cloth that is provided with between said catalytic reaction unit and the particulate matter removing device.
Said gas approach place is provided with the flow monitoring device that is used to monitor the flue gas flow that gets into particulate matter removing device.
Be connected with on the said dedusting seat and be used to derive the particle delivery line that is deposited on the dust granules in the dedusting seat, said particle delivery line extends to outside the housing and the row of a being provided with switch valve away from an end of dedusting seat.
Said catalytic reaction unit comprises fluidizing reactor; Said fluidizing reactor comprises horizontally disposed catalytic bed; Said catalytic bed comprises catalytic bed and is located at the reaction bed material on the said catalytic bed that said catalytic bed is to be used for the air-flow that gets into catalyst unit is caused the deflector on the reaction bed material.
Said fluidizing reactor comprises two-layer above-described catalytic bed; Each catalytic bed is parallel interval setting and be equipped with central tube successively from the top down; Said central tube be in tube wall cooperating of each catalytic bed and be provided with air admission hole and be arranged with cylindrical sieve plate; The outlet of the upper end of central tube and the clean flue gas of said housing communicates, and is provided with outer the turning edge that the internal face with housing is sealed and matched on the outside wall surface of central tube in the place, top of fluidizing reactor.
Because the particulate matter removing device of flue gas of refuse burning dedusting catalytic denitration reaction unit of the present invention is located at the below (upper reaches) of said catalytic reaction unit; Therefore in the course of the work; Flue gas at first carries out dedusting through said particulate matter removing device; Reduced influence, thereby improved the catalytic efficiency of catalytic reaction unit the catalytic reaction of catalytic reaction unit; In addition; Because described particulate matter removing device comprises dedusting seat and dust removing tube, said dedusting seat is the tubular of open upper end, following end closure, and the upper/lower terminal of said dust removing tube is the hatch frame and the outside wall surface of its upper end and the internal face of housing and is sealed and matched; The lower end of dust removing tube is inserted in the dedusting seat and its lower surface and dedusting seat matched in clearance; The upper end internal face of dedusting seat and the outside wall surface matched in clearance of dust removing tube, in the course of the work, flue gas must move in the gas channel of housing at first from bottom to top; Under differential pressure action, be moved into the dedusting seat from the top down by beginning behind the dust removing tube block; And then the flue gas in the dedusting seat gets into dust removing tube once more from bottom to top, and finally the open upper end exhaust particulate matter from dust removing tube removes device, and flue gas is repeatedly switching-over motion in particulate matter removing device; Combine the effect of gravity to cause the particle that wherein is mingled with to be able to remove simultaneously and be deposited in the dedusting seat; Whole dust removal process adopts the mode of gravitational dust collection, has abandoned traditional fiber bag precipitator, has solved the existing short problem of life-span that is used for the deduster of denitration reaction device.
Description of drawings
Fig. 1 is the structural representation of the embodiment 1 of flue gas of refuse burning dedusting catalytic denitration reaction unit.
The specific embodiment
The embodiment 1 of flue gas of refuse burning dedusting catalytic denitration reaction unit; As shown in Figure 1; Have housing 1, housing is cylindrical and be divided into two sections of upper semisection and lower semisections, and flange connects between said upper semisection and the lower semisection; The housing 1 of employing two-part can be changed each parts of housing 1 inside easily; Wherein the upper end of upper semisection is provided with the clean flue gas outlet 1-1 that supplies treated clean flue gas to discharge, and the lower end of lower semisection is provided with the gas approach that supplies the interior flue gas of corresponding flue to get into, and between said gas approach and clean flue gas outlet 1-1, is provided with gas channel in the housing 1; The lower end of housing 1 is provided with in its gas approach place and preheats the unit, preheats the unit and is used for the flue gas that gets in the said gas channel is preheated to improve its catalytic reaction efficient, preheats the preheating bed that the unit comprises heater 2 and is located at heater 2 tops; Wherein the preheating bed is located in the said gas channel; Heater 2 adopts coil heaters, and the preheating bed comprises a ventilative up and down preheating bed 3-1 and be located at the preparatory hot bed materials 3-2 on the preheating bed 3-1, in advance hot bed materials 3-2 be used for the flue gas heater via preheat the back through the time reach fluidization and and flue gas heat exchange; Thereby fully mixing the uneven flue gas that is heated at heater 2 places originally makes it reach isothermal; Improve its next step catalytic reaction efficient, among this embodiment, hot bed materials 3-2 adopts quartz sand in advance; Be laid with blast cap 4 on the upper surface of preheating bed 3-1; Blast cap 4 lower ends are provided with air inlet, and preheating bed 3-1 is provided with the through hole that communicates with said air inlet, and blast cap 4 makes preheating bed 3-1 form an air distribution plate; The air-flow that is used for passing through distributes uniformly and changes its flow direction; Thereby make the flue gas that passes through flow with direction initialization, the bottom of preheating bed 3-1 is connected with the bed material delivery line 10 that is used to derive preparatory hot bed materials 3-2, and bed material delivery line 10 is provided with discharge switch valve 11; Be provided with catalytic reaction unit and particulate matter removing device in the gas channel of housing 1 one on the other; Particulate matter removing device is located at and is preheated the top, unit so that the pre-warmed flue gas of process is carried out dedusting; Particulate matter removing device comprises dedusting seat 5 and dust removing tube 6; Dedusting seat 5 is the tubular of open upper end, following end closure, and the whole outline of dust removing tube 6 is Y-shaped, and its upper/lower terminal is hatch frame; The outside wall surface of dust removing tube 6 upper ends and the internal face of housing 1 are sealed and matched; The lower end of dust removing tube 6 is inserted in the dedusting seat 5 and the bottom surface matched in clearance of its lower surface and dedusting seat 5, its be positioned at dedusting seat 5 part outside wall surface all with the internal face matched in clearance of dedusting seat 5, the outside wall surface matched in clearance of the internal face of the upper end of dedusting seat and dust removing tube; Thereby make the flue gas that gets into particulate matter removing device to move at first from bottom to top; Under differential pressure action, be moved into dedusting seat 5 from the top down by beginning behind dust removing tube 6 blocks, and then get into dust removing tube 6 once more from bottom to top from dedusting seat 5 interior flue gases, finally the open upper end exhaust particulate matter from dust removing tube 6 removes device; Flue gas is repeatedly switching-over motion in particulate matter removing device; Combine the effect of gravity to cause the particle 7 that wherein is mingled with to be able to remove and to be deposited in the dedusting seat 5 simultaneously, dedusting seat 5 is provided with particle delivery line 8, and an end of particle delivery line 8 is fixed on the dedusting seat 5 and with the inner chamber of dedusting seat 5 and communicates; The other end overhangs to the housing 1 and is downward-sloping; Particle delivery line 8 is used for the particle 7 that is deposited in the dedusting seat 5 is derived reaction unit, and the part that particle delivery line 8 stretches out housing is provided with row's grain switch valve 9, and row's grain switch valve 9 is used for opening as required or cutting off particle delivery line 8; This particle is deviate from device and can effectively be avoided when filtering flying dust, having too much particle and fill up the reactor space, and build-up of pressure is excessive, and through the bed flow impurity in the fly ash granule is taken away; The separated screen cloth 12 that is provided with between catalytic reaction unit and the particulate matter removing device; This screen cloth 12 adopts metallic sieve; Screen cloth 12 can further carry out dust removal process to flue gas on the one hand, is used on the other hand the flue gas that is about to get in the catalytic reaction unit is carried out uniform distribution; The catalytic reaction unit comprises fluidizing reactor, and in the present embodiment, fluidizing reactor comprises four layers of catalytic bed; Each catalytic bed includes catalytic bed 13 and is located at the reaction bed material 14 on the catalytic bed 13; Catalytic bed 13 is designed to deflector, causes on the reaction bed material 14 and makes reaction bed material 14 reach fluidization with the flue gas that will get into the catalytic reaction unit, thereby make flue gas fully contact with the reaction bed material; Guaranteeing to improve rate of catalysis reaction under the uniform prerequisite of catalytic bed internal temperature; Fully improve the utilization rate of reaction bed material, avoided the accumulation of reaction bed material, prevented the generation that the reaction bed material stops up the problem of catalytic bed; The center of each catalytic bed is equipped with a central tube 15; The upper end of this central tube 15 and the clean flue gas of housing export the 1-1 conducting and are provided with the outer 15-1 that turns edge; Outer the turning edge of central tube 15 cut off the gas channel in the housing on vertical; The cooperation place of central tube 15 and each catalytic bed is respectively equipped with the through hole that the flue gas of confession after catalytic reaction pass through and is arranged with cylindrical sieve plate 18, and cylindrical sieve plate 18 is used to prevent that the reaction bed material from getting into central tube 15 with flue gas; Thereby make and discharge via the clean flue gas outlet of housing with the reacted flue gas formation clean flue gas of each catalytic bed and from central tube 15; Respectively be provided with temperature measuring equipment 16 on particulate matter removing device and the catalytic reaction unit, temperature measuring equipment 16 adopts thermocouple and is connected with controller 17, and controller 17 is used for the Signal Regulation heater according to temperature measuring equipment; In addition; The gas approach place also is provided with flow monitoring device (not shown), and the flow monitoring device is used to monitor the flue gas flow that gets into particulate matter removing device, in the use; Flue gas after described gas approach and the boiler combustion is linked to each other; The exhaust gas volumn that produces in the boiler is by burning wind control, and burning wind is how much controlling of based on fuel amount, through observing the fuel quantity of the control boiler that said flow monitoring device can be in good time; Thereby make the exhaust gas volumn that gets into said gas approach be controlled in the optimum range, give full play to the denitration performance of flue gas of refuse burning dedusting catalytic denitration reaction unit of the present invention.Because the existence of said particulate matter removing device; But make and reduce cost the not only fine particle thing in the effective elimination incineration flue gas of this flue gas ash removal denitration reaction device, and have simple to operate; Characteristics such as efficiency of dust collection height can be avoided the influence of particle to catalyst efficient simultaneously.
In other embodiment of flue gas of refuse burning dedusting catalytic denitration reaction unit, the catalytic bed of the fluidizing reactor described in the embodiment 1 of flue gas of refuse burning dedusting catalytic denitration reaction unit is all can more than one deck; Said fluidizing reactor can also substitute through the reactor of other type.
Claims (6)
1. a flue gas of refuse burning dedusting catalytic denitration reaction unit comprises housing, and the lower end of said housing is provided with gas approach; The upper end is provided with the clean flue gas outlet; Between its gas approach and clean flue gas outlet, be provided with gas channel in the housing, said smoke inlet place is provided with and preheats the unit, it is characterized in that; Be provided with catalytic reaction unit and particulate matter removing device in the said gas channel from top to bottom successively; Said particulate matter removing device comprises dedusting seat and dust removing tube, and said dedusting seat is the tubular of open upper end, following end closure, and the upper/lower terminal of said dust removing tube is the hatch frame and the outside wall surface of its upper end and the internal face of housing and is sealed and matched; The lower end of dust removing tube is inserted in the dedusting seat and its lower surface and dedusting seat matched in clearance, the upper end internal face of dedusting seat and the outside wall surface matched in clearance of dust removing tube.
2. flue gas of refuse burning dedusting catalytic denitration reaction unit according to claim 1 is characterized in that, the separated screen cloth that is provided with between said catalytic reaction unit and the particulate matter removing device.
3. flue gas of refuse burning dedusting catalytic denitration reaction unit according to claim 1 is characterized in that, said gas approach place is provided with the flow monitoring device that is used to monitor the flue gas flow that gets into particulate matter removing device.
4. flue gas of refuse burning dedusting catalytic denitration reaction unit according to claim 1; It is characterized in that; Be connected with on the said dedusting seat and be used to derive the particle delivery line that is deposited on the dust granules in the dedusting seat, said particle delivery line extends to outside the housing and the row of a being provided with switch valve away from an end of dedusting seat.
5. flue gas of refuse burning dedusting catalytic denitration reaction unit according to claim 1; It is characterized in that; Said catalytic reaction unit comprises fluidizing reactor; Said fluidizing reactor comprises horizontally disposed catalytic bed, and said catalytic bed comprises catalytic bed and be located at the reaction bed material on the said catalytic bed that said catalytic bed is to be used for the air-flow that gets into catalyst unit is caused the deflector on the reaction bed material.
6. flue gas of refuse burning dedusting catalytic denitration reaction unit according to claim 5; It is characterized in that; Said fluidizing reactor comprises two-layer above-described catalytic bed; Each catalytic bed is parallel interval setting and be equipped with central tube successively from the top down; Said central tube is provided with air admission hole and is arranged with cylindrical sieve plate with being in tube wall cooperating of each catalytic bed, and the outlet of the upper end of central tube and the clean flue gas of said housing communicates, and is provided with outer the turning edge that the internal face with housing is sealed and matched on the outside wall surface of central tube in the place, top of fluidizing reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110381332.5A CN102688686B (en) | 2011-11-26 | 2011-11-26 | Waste incineration flue gas dedusting, catalyzing and denitrification reaction device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110381332.5A CN102688686B (en) | 2011-11-26 | 2011-11-26 | Waste incineration flue gas dedusting, catalyzing and denitrification reaction device |
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| Publication Number | Publication Date |
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| CN102688686A true CN102688686A (en) | 2012-09-26 |
| CN102688686B CN102688686B (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110381332.5A Expired - Fee Related CN102688686B (en) | 2011-11-26 | 2011-11-26 | Waste incineration flue gas dedusting, catalyzing and denitrification reaction device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107166398A (en) * | 2017-07-13 | 2017-09-15 | 四川挺立机电科技有限公司 | A kind of array is superimposed integrated self- steering castoff heat cracking complete set of equipments |
| CN115228287A (en) * | 2022-07-12 | 2022-10-25 | 宁夏青铜峡水泥股份有限公司 | System and method for cooperatively removing nitrogen oxides in cement kiln tail flue gas dust |
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|---|---|---|---|---|
| JP2000279751A (en) * | 1999-03-29 | 2000-10-10 | Electric Power Dev Co Ltd | Method and device for denitrating pressure fluidized bed boiler |
| CN101664615A (en) * | 2009-09-08 | 2010-03-10 | 中电投远达环保工程有限公司 | Flue gas pre-dedusting device used for SCR denitration system |
| CN201807247U (en) * | 2010-09-02 | 2011-04-27 | 朱敬 | Flue gas denitration device with gravitational setting pre-dedusting and high effective flue gas rectifying functions |
| CN202343097U (en) * | 2011-11-26 | 2012-07-25 | 河南科技大学 | Dust removal and catalytic denitration reaction device for garbage incineration flue gas |
-
2011
- 2011-11-26 CN CN201110381332.5A patent/CN102688686B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000279751A (en) * | 1999-03-29 | 2000-10-10 | Electric Power Dev Co Ltd | Method and device for denitrating pressure fluidized bed boiler |
| CN101664615A (en) * | 2009-09-08 | 2010-03-10 | 中电投远达环保工程有限公司 | Flue gas pre-dedusting device used for SCR denitration system |
| CN201807247U (en) * | 2010-09-02 | 2011-04-27 | 朱敬 | Flue gas denitration device with gravitational setting pre-dedusting and high effective flue gas rectifying functions |
| CN202343097U (en) * | 2011-11-26 | 2012-07-25 | 河南科技大学 | Dust removal and catalytic denitration reaction device for garbage incineration flue gas |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107166398A (en) * | 2017-07-13 | 2017-09-15 | 四川挺立机电科技有限公司 | A kind of array is superimposed integrated self- steering castoff heat cracking complete set of equipments |
| CN115228287A (en) * | 2022-07-12 | 2022-10-25 | 宁夏青铜峡水泥股份有限公司 | System and method for cooperatively removing nitrogen oxides in cement kiln tail flue gas dust |
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| CN102688686B (en) | 2014-03-12 |
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