CN216755974U - System for eliminating SNCR (selective non-catalytic reduction) denitration ammonia escape of flue gas - Google Patents
System for eliminating SNCR (selective non-catalytic reduction) denitration ammonia escape of flue gas Download PDFInfo
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- CN216755974U CN216755974U CN202122625095.4U CN202122625095U CN216755974U CN 216755974 U CN216755974 U CN 216755974U CN 202122625095 U CN202122625095 U CN 202122625095U CN 216755974 U CN216755974 U CN 216755974U
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Abstract
The utility model relates to the field of boiler flue gas treatment, in particular to an SNCR (selective non-catalytic reduction) denitration ammonia escape system for eliminating flue gas, which is arranged on an ammonia escape section between an SNCR technology denitration section and a dedusting and desulfurization section, and comprises an atomizing device and a storage tank connected with the atomizing device, wherein the storage tank is used for storing an ammonia reaction liquid, and the ammonia escape section is provided with an installation opening communicated with the atomizing device. The utility model utilizes the atomization device to eliminate and decompose ammonia escape in the flue gas, thereby meeting the requirements of environmental protection.
Description
Technical Field
The utility model relates to the field of boiler flue gas treatment, in particular to a system for eliminating SNCR (selective non-catalytic reduction) denitration ammonia escape of flue gas.
Background
At present, most of flue gas (waste gas) denitration adopts amino as a reducing agent for denitration, and NO is generated in practical applicationxThe reaction with amino groups is never 100%, there always being a portion of NH remaining3This unreacted NH is emitted with the flue gas3The ammonia escape rate is called as ammonia escape amount, and the ammonia salt in downstream equipment is blocked due to overhigh ammonia escape rate, so that the smoke discharge is not smooth, or the downstream flue is corroded seriously; and the ammonia escapes to enter air excessively, which causes secondary pollution to the environment. Therefore, the ammonia escape rate is reduced, and the safety operation of the equipment at the tail part of the boiler (kiln) and the reduction of secondary pollution are necessary.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an SNCR denitration ammonia escape system for eliminating flue gas, which aims to solve the problem of overhigh ammonia escape rate after denitration of the existing flue gas (waste gas).
In order to solve the technical problems, the technical means of the system for eliminating the SNCR denitration ammonia escape of the flue gas is as follows: the system is arranged on an ammonia escape section between an SNCR technology denitration section and a dedusting and desulfurization section, and comprises an atomizing device and a storage tank connected with the atomizing device, wherein the storage tank is used for storing ammonia reaction liquid, and an installation opening communicated with the atomizing device is arranged on the ammonia escape section.
The SNCR denitration ammonia escape system for eliminating flue gas has the following technical advantages: the utility model mixes the ammonia reaction liquid with the flue gas by using the atomization device to generate a reduction reaction, thereby decomposing NH which does not completely participate in the reaction in the flue gas3Further eliminating ammonia escape and reducing the escape rate of ammonia. The utility model utilizes the atomization device to atomize and move the ammonia reaction liquid, and the ammonia reaction liquid is effectively arranged in the ammonia escape section to be strongly mixed with the flue gas. The utility model has uniform atomization and strong mixing with flue gas, thereby having high deamination efficiency, further greatly reducing a plurality of side effects caused by ammonia escape and having good social value.
Preferably, the atomization device comprisesAn atomization spray gun with a nozzle end inserted into the ammonia escape section, wherein a liquid inlet of the atomization spray gun is connected with ammonia reaction liquid conveying equipment; the liquid inlet is connected with ammonia reaction liquid conveying equipment, and the liquid inlet is connected with pneumatic conveying equipment; the flue gas is conveyed by compressed air or high-pressure air by using an atomizing device, is fully mixed with the flue gas in the flue and is mixed with escaped NH3A reduction reaction takes place.
Preferably, the atomization device is an ultrasonic atomization device and a conveying pipe which connects the atomization device and the ammonia escape section.
Preferably, a sealing device is further arranged at the mounting opening and used for sealing a gap between the atomizing device and the mounting opening; the sealing device can better seal the gap between the atomizing device and the mounting opening, and the leakage of smoke is avoided.
As a preferred scheme, the atomization spray gun is also provided with a harmonic oscillation compressed air inlet; the harmonic oscillation compressed air inlet is connected with a blowing system controlled by a harmonic oscillation control system through a pipeline, and the harmonic oscillation control system comprises a harmonic oscillation modulation unit and a valve group controlled by the harmonic oscillation modulation unit; the spraying and blowing system controlled by the harmonic oscillation control system enables the atomizing spray gun to have more efficient atomizing capacity, improves the mixing capacity of an atomizing medium and smoke, and enables atomization and mixing to be considered.
As a preferred scheme, the sealing device comprises a sealing box which is in sealing connection with an atomizing spray gun and an SNCR denitration section installation opening, installation through holes matched with the atomizing spray gun are formed in two sides of the sealing box, and a purging pipe for purging impurities at the installation opening is further arranged on the sealing box; the pipe that sweeps can prevent that impurity from getting into the installation opening, prevents to block up the adjustment that influences the spout angle, sweeps the pipe simultaneously and can also blow away impurity, guarantees the nimble rotation of atomizing spray gun spout when guaranteeing to seal.
Preferably, the sweeping pipe has two positions which respectively face the installation opening of the SNCR denitration section; a sealing heat-insulating layer is arranged between the mounting through hole of the sealing box and the atomizing spray gun; two purging pipes can just cover the outside circumference of atomizing spray gun, compare the effect when one purging pipe uses better.
As a preferred scheme, an angle adjusting device is connected to the outside of the atomizing spray gun, and the angle adjusting device drives the atomizing spray gun to move around the mounting opening to adjust the nozzle angle of the atomizing spray gun; the angle adjusting device drives the atomizing spray gun nozzle to change the angle, and adjusts the radial spraying angle of the spray gun in real time, so that the ammonia reaction liquid is mixed with the flue gas in a disturbing manner, and the reduction efficiency of ammonia is improved.
Preferably, the angle adjusting device is provided with two positions, and the moving directions of the two angle adjusting devices are crossed.
Preferably, the angle adjusting device is a hydraulic cylinder, an air cylinder, a screw elevator or a telescopic motor.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic view 1 of example 1 of the present invention;
FIG. 3 is a schematic view 2 of example 1 of the present invention.
The main part symbols in the figures are explained as follows:
1. a storage tank; 2. ammonia reaction liquid conveying equipment; 3. an atomizing spray gun; 4. a pneumatic conveying device; 5. a combustion chamber; 6.
an SNCR denitration section; 7. an ammonia escape segment; 8. a dust removal and desulfurization section; 9. a flue gas discharge section; 11. an angle adjusting device; 12. a sealing box; 13. a purge tube; 14. a harmonic oscillation compressed air inlet; 15. harmonic oscillation control system.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.
Example 1
As shown in figure 1, eliminate flue gas SNCR denitration ammonia escape system and set up on ammonia escape segment 7 between SNCR technique denitration section 6 and dust removal desulfurization section 8, ammonia escape segment 7 and SNCR technique denitration section 6, dust removal desulfurization section 8 intercommunication, SNCR technique denitration section 6 links to each other with combustion chamber 5, and 8 exit linkage flue gas discharge section 9 in the dust removal desulfurization section. The part between the SNCR technology denitration section 6 and the dust removal desulfurization section 8 is an ammonia escape section 7, the temperature range of the ammonia escape section 7 is 300-750 ℃, the temperature range of 300-750 ℃ is favorable for mixing ammonia reaction liquid and flue gas, and the reduction reaction is promoted, the device comprises an atomizing device and a storage tank 1 connected with the atomizing device, the storage tank 1 is used for storing the ammonia reaction liquid, and the ammonia escape section 7 is provided with an installation opening communicated with the atomizing device and the flue gas.
The atomization device comprises an atomization spray gun 3 with a nozzle end inserted into an ammonia escape section, a liquid inlet of the atomization spray gun 3 is connected with ammonia reaction liquid conveying equipment 2, and a liquid inlet of the atomization spray gun 3 is connected with pneumatic conveying equipment 4; the liquid inlet is connected with the ammonia reaction liquid conveying equipment 2, and the liquid inlet is connected with the pneumatic conveying equipment 4. The pneumatic conveying device 4 is used for generating compressed air or high-pressure air.
As shown in fig. 2, a sealing device is further disposed at the mounting opening, and the sealing device is used for sealing a gap between the atomizing device and the mounting opening. Sealing device is including sealing connection atomizing spray gun 3 and 6 installation open-ended seal box 12 of SNCR denitration section, and the both sides of seal box 12 all are provided with the installation through-hole with atomizing spray gun 3 complex, still are provided with on the seal box 12 and carry out the purge pipe 13 that sweeps to installation opening part department impurity. The two positions of the purging pipe 13 are respectively towards the installation openings of the SNCR denitration section 6; a sealing and heat-insulating layer is arranged between the mounting through hole of the sealing box 12 and the atomizing spray gun 3, and the sealing and heat-insulating layer is preferably a glass fiber layer or an asbestos layer.
The external connection of atomizing spray gun 3 has angle adjusting device 11, and angle adjusting device 11 drives atomizing spray gun 3 and removes around the erection opening part, realizes the adjustment to 3 spout angles of atomizing spray gun. The angle adjusting device 11 is provided with two positions, the moving directions of the two angle adjusting devices 11 are crossed, preferably, one angle adjusting device 11 is located in the vertical direction, the other angle adjusting device is located in the horizontal direction of the angle adjusting device 11, the two angle adjusting devices can move in two directions of an X, Y shaft in a matched mode, any movement in the radial direction of a nozzle of the atomizing spray gun 1 is achieved, and the atomizing spray gun 1 can rotate 360 degrees in a certain range around an installation opening. The angle adjusting device 11 can be a hydraulic cylinder, an air cylinder, a thread elevator or a telescopic motor, and controls the nozzle angle of the atomizing spray gun 3 through the feedback of displacement, wherein the upper end of the angle adjusting device 11 is hinged with the atomizing spray gun 1, and the lower end of the angle adjusting device is hinged and fixed with the ground, a base, a frame or a base.
As shown in fig. 3, the atomizing spray gun 3 is further provided with a harmonic oscillation compressed air inlet 14; harmonic oscillation compressed air inlet 14 has the jetting system through harmonic oscillation control system control through the pipe connection, and harmonic oscillation control system 15 includes harmonic oscillation modulation unit and by its controlled valve group.
Example 2
The difference between the embodiment 2 and the embodiment 1 is that the atomizing device is different, and the atomizing device in the embodiment 2 is an ultrasonic atomizing device and a conveying pipe which connects the atomizing device and the ammonia escape section 7.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The utility model provides an eliminate flue gas SNCR denitration ammonia escape system which characterized in that: the system is arranged on an ammonia escape section between an SNCR technology denitration section and a dust removal and desulfurization section, and comprises an atomization device and a storage tank connected with the atomization device, wherein the storage tank is used for storing ammonia reaction liquid, and an installation opening communicated with the atomization device is arranged on the ammonia escape section.
2. The system for eliminating SNCR denitration ammonia escape of flue gas according to claim 1, characterized in that: the atomization device comprises an atomization spray gun with a nozzle end inserted into an ammonia escape section, a liquid inlet of the atomization spray gun is connected with ammonia reaction liquid conveying equipment, and a liquid inlet of the atomization spray gun is connected with pneumatic conveying equipment.
3. The system for eliminating SNCR denitration ammonia escape of flue gas according to claim 1, characterized in that: the atomizing device is ultrasonic atomizing equipment and a conveying pipe which connects the atomizing device and the ammonia escape section.
4. The system for eliminating SNCR denitration ammonia escape of flue gas as claimed in claim 2 or 3, wherein: the mounting opening is further provided with a sealing device, and the sealing device is used for sealing and connecting the gap between the atomizing device and the mounting opening.
5. The system for eliminating SNCR denitration ammonia escape of flue gas according to claim 2, characterized in that: the atomization spray gun is also provided with a harmonic oscillation compressed air inlet; the harmonic oscillation compressed air inlet is connected with a blowing system controlled by a harmonic oscillation control system through a pipeline, and the harmonic oscillation control system comprises a harmonic oscillation modulation unit and a valve group controlled by the harmonic oscillation modulation unit.
6. The system for eliminating SNCR denitration ammonia escape of flue gas as claimed in claim 2 or 5, wherein: the externally connected of atomizing spray gun has angle adjusting device, angle adjusting device drives atomizing spray gun and removes around the erection opening part, realizes the adjustment to atomizing spray gun spout angle.
7. The SNCR denitration ammonia escape system for eliminating flue gas as recited in claim 6, wherein: the angle adjusting device is provided with two positions, and the moving directions of the two angle adjusting devices are crossed.
8. The SNCR denitration ammonia escape system for eliminating flue gas as recited in claim 7, wherein: the angle adjusting device is a hydraulic cylinder, an air cylinder, a thread elevator or a telescopic motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122625095.4U CN216755974U (en) | 2021-10-29 | 2021-10-29 | System for eliminating SNCR (selective non-catalytic reduction) denitration ammonia escape of flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122625095.4U CN216755974U (en) | 2021-10-29 | 2021-10-29 | System for eliminating SNCR (selective non-catalytic reduction) denitration ammonia escape of flue gas |
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| Publication Number | Publication Date |
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| CN216755974U true CN216755974U (en) | 2022-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122625095.4U Active CN216755974U (en) | 2021-10-29 | 2021-10-29 | System for eliminating SNCR (selective non-catalytic reduction) denitration ammonia escape of flue gas |
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| CN (1) | CN216755974U (en) |
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2021
- 2021-10-29 CN CN202122625095.4U patent/CN216755974U/en active Active
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