CN210097347U - Dry-type denitration spray gun device - Google Patents
Dry-type denitration spray gun device Download PDFInfo
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- CN210097347U CN210097347U CN201920504788.8U CN201920504788U CN210097347U CN 210097347 U CN210097347 U CN 210097347U CN 201920504788 U CN201920504788 U CN 201920504788U CN 210097347 U CN210097347 U CN 210097347U
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Abstract
The utility model provides a dry-type denitration spray gun device, solves the denitration inefficiency that prior art exists, and denitration medicament use amount is big, and the denitration effect is unstable, can't satisfy the problem of discharging the index requirement. Including the spray gun pipe that passes the furnace body lateral wall, its characterized in that: the spray gun pipe is positioned at the upper side in front of the nozzle at one end in the furnace body and is provided with a blocking umbrella; the narrow end of the conical arc plate of the blocking umbrella is a connecting part, and the wide end of the conical arc plate is a denitration agent injection port; a chemical distribution plate, a loss blocking plate, a zone separation plate and a thermal resistance baffle are respectively arranged on the inner arc surface of the lower side of the conical arc plate of the blocking umbrella along the spraying direction of the denitration chemical; the blocking umbrella is connected with the upper side of the front end of the nozzle through a connecting part, and the denitration medicament jet orifice of the blocking umbrella faces the inside of the furnace body. Its reasonable in design, compact structure, medicament coverage is big, and the denitration is efficient, can practice thrift the use amount of denitration medicament, and the denitration effect is stable, and the practicality is strong.
Description
Technical Field
The utility model belongs to the technical field of boiler flue gas denitration, concretely relates to medicament coverage is big, and the denitration is efficient, can practice thrift denitration medicament use amount, and the denitration effect is stable, the dry-type denitration spray gun device that the practicality is strong.
Background
The traditional process of the flue gas denitration device of the industrial coal-fired heat supply boiler and the self-contained power plant boiler adopts the selective non-catalytic reduction (SNCR) technology. The selective non-catalytic reduction means that under the action of no catalyst, a reducing agent is sprayed into a temperature window suitable for denitration reaction to reduce nitrogen oxides in the flue gas into harmless nitrogen and water. The technology generally adopts ammonia, urea or hydroammonia acid sprayed in a furnace as a reducing agent to reduce NOX. The reducing agent only neutralizes NO in the flue gasXThe reaction, which is generally not reactive with oxygen, does not employ a catalyst, so this process is referred to as selective non-catalytic reduction (SNCR). Since the process does not use a catalyst, the reducing agent must be added in the high temperature zone. Spraying the reducing agent into a region with the hearth temperature of 850-1100 ℃, and quickly thermally decomposing into NH3With NO in the flue gasXReaction to form N2And water.
As most of heat supply boilers are grate-fired chain boilers, the temperature window of a hearth is below 800 ℃, and the denitration efficiency of the SNCR is low in a normal temperature window (850-1100 ℃); therefore, the traditional SNCR process technology cannot reach the discharge index required by the current ecological environmental protection department due to the working condition problems of the hearth temperature, the oxygen content, the coal seam thickness, the traveling speed of the chain grate stoker and the like of the grate-fired chain stoker. Therefore, the boiler flue gas denitration device in the prior art needs to be improved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to above-mentioned problem, it is big to provide a medicament coverage, and the denitration is efficient, can practice thrift denitration medicament use amount, and the denitration effect is stable, the dry-type denitration spray gun device that the practicality is strong.
The utility model adopts the technical proposal that: this dry-type denitration spray gun device is including the spray gun pipe that passes the furnace body lateral wall, its characterized in that: a nozzle is arranged at one end of the spray gun pipe positioned in the furnace body, and a blocking umbrella is arranged on the upper side in front of the nozzle; the blocking umbrella is composed of a conical arc plate, the narrow end of the conical arc plate is a connecting part, and the wide end of the conical arc plate is a denitration agent injection port; the chemical distribution plate, the loss blocking plate, the area separating plate and the thermal resistance baffle are arranged on the inner arc surface on the lower side of the conical arc plate of the blocking umbrella along the spraying direction of the denitration chemical respectively, and the lengths of the chemical distribution plate, the loss blocking plate, the area separating plate and the thermal resistance baffle along the radial direction of the inner arc surface of the blocking umbrella are increased in sequence; the blocking umbrella is connected with the upper side of the front end of the nozzle through a connecting part, and a denitration medicament jet orifice of the blocking umbrella faces the inside of the furnace body.
And the outer wall of the nozzle at the front end of the spray gun pipe is provided with a limiting clamping groove for fixing the nozzle at the inner position of the furnace body. The nozzle is fixed on the inner wall of the furnace body by utilizing the limiting snap ring, so that the use stability of the device is improved.
The lance tube axis is inclined to the upper side with respect to the horizontal plane. So that the agent sprayed from the lance pipe can cover the combustion section of the whole main combustion area, and the stability of the denitration effect is ensured.
The axis of the blocking umbrella at the front end of the lance tube is inclined to the right side relative to the vertical plane. So that the denitration medicament sprayed from the spray gun pipe can cover the combustion section of the whole main combustion area, and the coverage rate of the medicament is effectively improved.
The length of a blocking loss plate of the blocking umbrella is 10-20 mm longer than that of the medicament distribution plate; the length of the area separation plate is 10-20 mm longer than that of the blocking loss plate; the length of the thermal resistance baffle is 10-20 mm longer than that of the area separation plate. In order to promote the denitration effect through stopping mutually supporting and complementing between the medicament distributing plate of umbrella, stopping loss board, regional division board and the thermal resistance baffle.
The end of the spray gun tube, which is positioned outside the furnace body, is provided with a flexible connection, the end part of the flexible connection is connected with one end of a tee joint through a swing check valve, the other end of the tee joint is connected with one end of a ball valve through an observation mirror, the tee joint is also provided with a pressure gauge, and the pressure gauge is connected with the port of the tee joint through a meter bent pipe; the other end of the ball valve is connected with the output end of the distributor, and the input end of the distributor is connected with a main pipeline for conveying denitration agents.
The utility model discloses aHas the advantages that: because the utility model adopts the spray gun tube which passes through the side wall of the furnace body, the nozzle is arranged at one end of the spray gun tube which is positioned in the furnace body, and the blocking umbrella is arranged at the upper side in front of the nozzle; the blocking umbrella is composed of a conical arc plate, the narrow end of the conical arc plate is a connecting part, and the wide end of the conical arc plate is a denitration agent injection port; the chemical distribution plate, the loss blocking plate, the area separating plate and the thermal resistance baffle are respectively arranged on the inner arc surface on the lower side of the conical arc plate of the blocking umbrella along the spraying direction of the denitration chemical, and the lengths of the chemical distribution plate, the loss blocking plate, the area separating plate and the thermal resistance baffle along the radial direction of the inner arc surface of the blocking umbrella are sequentially increased; stop the umbrella and link to each other through connecting portion and nozzle front end upside, stop the denitration medicament jet orifice of umbrella and towards the inside structural style of furnace body, so its reasonable in design, compact structure through stopping mutually supporting and complementing between the medicament distributing plate of umbrella, stopping loss board, regional separate plate and the thermal resistance baffle for the denitration medicament that the denitration medicament jet orifice that stops the umbrella through the nozzle front end comes out, under the stirring of primary air, with NO, NO in the boiler flue gas, the denitration medicament of NO in2Oxidation-reduction reaction occurs to generate N2、CO2、H2O; the denitration efficiency can be improved by 10-20%, and simultaneously, the denitration medicament is saved by more than 30%; and the agent coverage is large, the denitration effect is stable, and the practicability is strong.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a front view of fig. 1.
Fig. 3 is a schematic view of a structure of the barrier umbrella of fig. 1.
Fig. 4 is a schematic view of the spray gun device of the present invention installed inside the furnace body in a use state.
Fig. 5 is a left side view of fig. 4.
Fig. 6 is a cross-sectional view taken along line a-a of fig. 5.
Fig. 7 is a cross-sectional view taken along line B-B of fig. 6.
The sequence numbers in the figures illustrate: 1 spray gun pipe, 2 block umbrella, 3 medicament distribution plates, 4 block loss board, 5 thermal resistance baffle, 6 zone separation board, 7 spray nozzles, 8 spacing draw-in groove, 9 toper arc board, 10 intrados, 11 denitration medicament injection ports, 12 connecting portions, 13 furnace bodies, 14 spray gun devices, 15 flexible couplings, 16 swing check valves, 17 sight glass, 18 ball valves, 19 distributors, 20 main pipes, 21 tee joints, 22 meter return bends, 23 pressure gauges.
Detailed Description
The specific structure of the present invention is described in detail with reference to fig. 1 to 7. The dry denitration spray gun device comprises a spray gun tube 1 penetrating through the side wall of a furnace body 13, wherein a nozzle 7 used for spraying denitration medicament into the furnace body 13 is arranged at one end of the spray gun tube 1, which is positioned inside the furnace body 13. One end of the lance tube 1, which is positioned outside the furnace body 13, is provided with a flexible connection 15, and the end part of the flexible connection 15 is connected with one end of a tee joint 21 through a swing check valve 16; the other end of the tee joint 21 is connected with one end of the ball valve 18 through the observation mirror 17, a pressure gauge 23 is further arranged on the tee joint 21, and the pressure gauge 23 is connected with a third port of the tee joint 21 through a meter elbow 22. The other end of the ball valve 18 is connected with an output end of a distributor 19, and an input end of the distributor 19 is connected with a main pipeline 20 for conveying denitration agent.
The upper side in the nozzle 7 the place ahead that the spray gun pipe 1 is located the inside one end setting of furnace body 13 is provided with and is used for increasing medicament coverage, promotes denitration efficiency's the umbrella 2 that blocks. The blocking umbrella 2 is composed of a conical arc plate 9, the narrow end of the conical arc plate 9 is a connecting part 12, and the wide end of the conical arc plate 9 is a denitration agent injection port 11. Meanwhile, on the inner arc surface 10 of the lower side of the conical arc plate 9 of the blocking umbrella 2 and along the spraying direction of the denitration medicament, medicament distribution plates 3 used for distributing the polymer denitration medicament are respectively and sequentially arranged, a blocking loss plate 4 used for protecting the polymer denitration medicament before reaction, an area separating plate 6 used for finally distributing and arranging the polymer denitration medicament, and a thermal resistance baffle plate 5 used for protecting the polymer denitration medicament at the position of the denitration medicament spraying opening 11 of the blocking umbrella 2. And the length of the medicament distributing plate 3, the barrier loss plate 4, the area separating plate 6 and the thermal resistance baffle 5 which are arranged at equal intervals along the radial direction of the inner cambered surface 10 of the barrier umbrella 2 is increased in sequence, namely: the extending length of the blocking loss plate 4 is 10-20 mm (preferably 15 mm) longer than that of the medicament distribution plate 3; the protruding length of the area separation plate 6 is 10-20 mm (preferably 15 mm) longer than that of the barrier loss plate 4; the length of the thermal resistance baffle 5 is 10-20 mm (preferably 15 mm) longer than that of the regional separation plate 6. And then through stopping mutually supporting and complementing between the medicament distributing plate 3 of umbrella 2, blocking loss board 4, regional division board 6 and thermal resistance baffle 5, promote the denitration effect.
The denitration burner comprises a gun barrel 1, a nozzle 7, an arc-shaped blocking umbrella 2, a limiting clamping groove 8, a limiting clamping ring, a blocking clamping groove, a pipe body and a pipe body, wherein the arc-shaped blocking umbrella 2 is connected with the upper side of the front end of the nozzle 7 through a connecting part 12 at one end, the denitration medicament injection port 11 at the other end of the blocking umbrella 2 is arranged towards the inside of a furnace body 13, the limiting clamping groove 8 is used for fixing the nozzle 7 in the inner position of the furnace body 13, the nozzle 7 is fixed on the inner wall of the furnace body 13 through the limiting clamping ring, the use stability of the denitration burner is improved, the axis of the gun barrel 1 inclines towards the upper side relative to the horizontal plane, the included angle α between the axis of the gun barrel 1 and the horizontal plane is 4-10 degrees, preferably 7 degrees, the axis of the blocking umbrella 2 at the front end of the gun barrel 1 is inclined.
When the dry denitration spray gun device is used, firstly, a plurality of groups of spray gun devices 14 are arranged on the side wall of a furnace body 13 according to the process requirement, and the nozzles 7 of the spray gun devices 14 are positioned at the inner side of the furnace body 13; meanwhile, one end of the spray gun device 14, which is positioned outside the furnace body 13, is connected with a flexible connection 15, and the end part of the flexible connection 15 is connected with one end of a tee 21 on which a pressure gauge 23 is arranged through a swing check valve 16; the other end of the tee joint 21 is connected with one end of a ball valve 18 through an observation mirror 17, the other end of the ball valve 18 is connected with the output end of a distributor 19, and the input end of the distributor 19 is connected with a main pipeline 20. When the flue gas in the furnace body 13 needs to be subjected to denitration treatment, the ball valve 18 is opened, and the denitration agent enters the distributor 19 through the main pipeline 20; and then delivered to each of the lance devices 14 via the distributor 19. The denitration agent sprayed from the nozzle 7 at the front end of the spray gun pipe 1 effectively improves the denitration effect through mutual matching and complementation among the agent distribution plate 3, the blocking loss plate 4, the area separation plate 6 and the thermal resistance baffle 5 of the blocking umbrella 2; simultaneously, contained angle and block the rational arrangement of contained angle between 2 axes of umbrella and the vertical face between 1 axis of spray gun pipe and the horizontal plane for spray gun pipe spun denitration medicament can cover whole main combustion area burning cross-section, effectively promotes the coverage rate of medicament, ensures the stability of denitration effect.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides a dry-type denitration spray gun device, includes spray gun pipe (1) of passing furnace body (13) lateral wall, its characterized in that: a nozzle (7) is arranged at one end of the spray gun pipe (1) positioned in the furnace body (13), and a blocking umbrella (2) is arranged on the upper side in front of the nozzle (7); the blocking umbrella (2) is composed of a conical arc plate (9), the narrow end of the conical arc plate (9) is a connecting part (12), and the wide end of the conical arc plate (9) is a denitration agent jet orifice (11); the length of the medicament distribution plate (3), the barrier loss plate (4), the area separating plate (6) and the thermal resistance baffle (5) along the radial direction of the inner cambered surface (10) of the barrier umbrella (2) is sequentially increased; the blocking umbrella (2) is connected with the upper side of the front end of the nozzle (7) through a connecting part (12), and a denitration medicament injection port (11) of the blocking umbrella (2) faces the inside of the furnace body (13).
2. The dry denitration lance device according to claim 1, wherein: and a limiting clamping groove (8) used for fixing the position of the nozzle (7) in the furnace body (13) is arranged on the outer wall of the nozzle (7) at the front end of the spray gun pipe (1).
3. The dry denitration lance device according to claim 1, wherein: the axis of the lance tube (1) is inclined to the upper side with respect to the horizontal plane.
4. The dry denitration lance device according to claim 1, wherein: the axis of the blocking umbrella (2) at the front end of the gunbarrel (1) inclines to the right side relative to the vertical surface.
5. The dry denitration lance device according to claim 1, wherein: the length of a blocking loss plate (4) of the blocking umbrella (2) is 10-20 mm longer than that of the medicament distribution plate (3); the length of the area separation plate (6) is 10-20 mm longer than that of the blocking loss plate (4); the length of the thermal resistance baffle (5) is 10-20 mm longer than that of the area separating plate (6).
6. The dry denitration lance device according to claim 1, wherein: one end of the lance tube (1) positioned outside the furnace body (13) is provided with a flexible connection (15), the end part of the flexible connection (15) is connected with one end of a tee joint (21) through a swing check valve (16), the other end of the tee joint (21) is connected with one end of a ball valve (18) through an observation mirror (17), the tee joint (21) is also provided with a pressure gauge (23), and the pressure gauge (23) is connected with the port of the tee joint (21) through a meter elbow (22); the other end of the ball valve (18) is connected with the output end of a distributor (19), and the input end of the distributor (19) is connected with a main pipeline (20) used for conveying denitration agents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920504788.8U CN210097347U (en) | 2019-04-15 | 2019-04-15 | Dry-type denitration spray gun device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920504788.8U CN210097347U (en) | 2019-04-15 | 2019-04-15 | Dry-type denitration spray gun device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210097347U true CN210097347U (en) | 2020-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920504788.8U Active CN210097347U (en) | 2019-04-15 | 2019-04-15 | Dry-type denitration spray gun device |
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| CN (1) | CN210097347U (en) |
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- 2019-04-15 CN CN201920504788.8U patent/CN210097347U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 6A1, 8th Street, Shenyang Economic and Technological Development Zone, Shenyang City, Liaoning Province, 110000 Patentee after: Liaoning Jinbao Environmental Protection Technology Co.,Ltd. Address before: No.116, Xingshun Street, Tiexi District, Shenyang, Liaoning 110000 Patentee before: Liaoning Jinbao Environmental Protection Technology Co.,Ltd. |
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| CP03 | Change of name, title or address |