CN211725347U - Calcination denitration catalyst's escape ammonia processing apparatus of tunnel cave - Google Patents
Calcination denitration catalyst's escape ammonia processing apparatus of tunnel cave Download PDFInfo
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- CN211725347U CN211725347U CN201922263151.7U CN201922263151U CN211725347U CN 211725347 U CN211725347 U CN 211725347U CN 201922263151 U CN201922263151 U CN 201922263151U CN 211725347 U CN211725347 U CN 211725347U
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- waste gas
- filter cloth
- tunnel kiln
- denitration catalyst
- ammonia
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Abstract
The utility model relates to a tunnel cave exhaust-gas treatment technical field specifically is an escape ammonia processing apparatus of tunnel cave of calcining denitration catalyst. The utility model comprises a tunnel kiln main body, a waste gas collecting pipeline arranged in the tunnel kiln main body and a waste gas reactor connected on the waste gas collecting pipeline; a discharge fan is also arranged on the connecting pipeline of the waste gas reactor and the waste gas collecting pipeline; the waste gas reactor is internally provided with a dust removal filter cloth layer, a back flushing device and a multi-stage ammonia removal filter cloth layer in sequence from an inlet to an outlet. The utility model discloses directly utilize the waste gas collecting tube in the tunnel cave, concentrate waste gas and carry to the waste gas reactor, filter cloth through the dust removal filter cloth layer falls dust particle and escape ammonia processing respectively, reasonable in design, and the economic nature is strong, and area is little, can carry out efficient deamination edulcoration to tunnel cave waste gas, makes tunnel cave waste gas obtain effectual purification, greatly reduced the pollution of tunnel cave waste gas to the air.
Description
Technical Field
The utility model relates to a tunnel cave exhaust-gas treatment technical field specifically is an escape ammonia processing apparatus of tunnel cave of calcining denitration catalyst.
Background
NH3Is a colorless, flammable and typical industrial gaseous pollutant with pungent and foul smell, and the emission of the pollutant seriously threatens the ecological environment. The water-soluble organic fertilizer reacts with sulfuric acid, nitric acid and the like in the atmosphere to generate ammonium sulfate salt or ammonium nitrate salt, the ammonium sulfate salt or the ammonium nitrate salt is deposited to cause acidification of soil and surface water and eutrophication of water body, and meanwhile, the nitrogen balance in an ecological system is also seriously disturbed. Second, NH3Is also one of the main pollutants involved in the formation of aerosols, generating solid Particles (PM) with an aerodynamic diameter of less than 2.5 μm2.5) After entering the pulmonary alveoli, the ventilation capacity of the lungs is directly affected, which leads to the body being easily in an anoxic state. In addition, partial diffusion into the atmospheric cloud results in changes in cloud chemistry and ozone layer oxidation rates. When the content is more than the lowest concentration (5.3ppm) which can be sensed by human body, discomfort is caused to human body, and when the content exceeds 76mg/m3Can stimulate human mucosa to reach 300mg/m3Can seriously damage the mucosal surface of the human body. Excess NH is inhaled3Thereafter, its rancidity and involvement in the reflex action of the trigeminal nerve endings can lead to cardiac arrest or cessation of breathing, endangering life safety. A large amount of the medicine is absorbed in a short time, symptoms such as lacrimation, chest distress, pharyngalgia, blood phlegm, dyspnea and the like can be caused, and complications such as pulmonary edema, respiratory distress syndrome and the like can be caused seriously. Long term exposure to NH3Can cause finger rotten feeding of part of peopleDisease or skin pigmentation, etc. Therefore, for containing NH3The treatment of waste gas has important social significance.
The honeycomb denitration catalyst can release a large amount of ammonia gas in the calcination process of the tunnel kiln, because ammonia water in the catalyst formula volatilizes, ammonium metavanadate is decomposed, ammonium metatungstate is decomposed and ethanolamine is decomposed to generate waste ammonia gas, and simultaneously the ammonia gas and H generated in the calcination process of the catalyst can be generated2O、SO3The reaction is carried out to generate ammonium sulfate and ammonium bisulfate particles. The conventional treatment measure of the tunnel kiln for calcining the catalyst at present is to remove dust from the waste gas by flue gas, absorb the tail gas by a tower and directly vent the waste gas by a chimney.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides a can make the escape ammonia "zero" of tunnel cave discharge, the escape ammonia processing apparatus of tunnel cave of the denitration catalyst of calcining of the useless ammonia gas that can effectively desorption catalyst calcination in-process produced and dust granule.
The utility model discloses a realize through following technical scheme:
an escaping ammonia treatment device of a tunnel kiln for calcining a denitration catalyst comprises a tunnel kiln main body, a waste gas collecting pipeline arranged in the tunnel kiln main body, and a waste gas reactor connected to the waste gas collecting pipeline; a discharge fan is also arranged on the connecting pipeline of the waste gas reactor and the waste gas collecting pipeline; the waste gas reactor is internally provided with a dust removal filter cloth layer, a back flushing device and a multi-stage ammonia removal filter cloth layer in sequence from an inlet to an outlet.
Furthermore, an inlet pipeline of the waste gas reactor is provided with an inlet measuring point, and an outlet pipeline is provided with an outlet measuring point.
Furthermore, the bottom of the waste gas reactor is also provided with a slag discharge port which is arranged at the dust removal side of the dust removal filter cloth layer.
Furthermore, the waste gas collecting pipeline is respectively provided with a collecting branch pipe corresponding to each heating unit of the tunnel kiln.
Further, the filter cloth of the dedusting filter cloth layer is made of P84, PTFE or PPS.
Furthermore, the number of layers of the multistage ammonia removal filter cloth layers is 1-4, the thickness of each layer is 3-20 mm, and an ammonia removal catalyst is attached to the filter cloth substrate.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model relates to an escape ammonia treatment device of a tunnel kiln for calcining a denitration catalyst, which directly utilizes a waste gas collecting pipeline in the tunnel kiln to intensively convey waste gas to a waste gas reactor, and dust particles and escape ammonia are respectively treated by filter cloth in a dust removal filter cloth layer, and the device has reasonable design, economy and small occupied area; because the dust removal filter cloth layer has good entrapment effect to the dust granule, multistage ammonia filter cloth layer that removes has the action of adsorbing and catalytic desorption to the howls of ammonia, and the waste gas that tunnel kiln produced can carry out the efficient deamination edulcoration to tunnel kiln waste gas after waste gas reactor handles, makes tunnel kiln waste gas obtain effectual purification, greatly reduced tunnel kiln waste gas to the pollution of air.
Preferably, the utility model discloses an entry and the export measurement station of setting up respectively in the entry of exhaust gas reactor and outlet pipeline department can in time effectually measure the ammonia concentration as required.
Preferably, the utility model discloses a set up the mode of row's cinder notch in exhaust gas reactor bottom, can concentrate by dust particle or dust that the dust removal filter cloth layer intercepted and collect the emission, guarantee exhaust gas reactor's treatment effect.
Preferably, the utility model discloses a waste gas collecting pipe is provided with the mode that corresponds every heating unit's of tunnel cave collection branch pipe respectively, can realize that waste gas collects comprehensively in the tunnel cave, and can improve and collect speed to guarantee final treatment effect.
Drawings
Fig. 1 is a schematic view of the structural arrangement of the device according to the embodiment of the present invention.
In the figure: 1 is a honeycomb denitration catalyst, 2 is a tunnel kiln main body, 3 is a temperature control unit, 4 waste gas collecting pipelines, 5 waste gas exhaust fans, 6 slag outlets, 7 waste gas reactors, 8 dust removal filter cloth layers, 9 back blowing devices, 10 multi-stage ammonia removal filter cloth layers, 11 inlet measuring points and 12 outlet measuring points.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
Example 1
As shown in fig. 1, the utility model relates to an escape ammonia treatment device of a tunnel kiln for calcining a denitration catalyst, which comprises a waste gas collecting pipeline 4, a discharge fan 5 and a waste gas reactor 7; the waste gas collecting pipeline 4 is positioned in the tunnel kiln main body 2, waste gas is conveyed to a waste gas reactor 7 through a discharge fan 5, escaping ammonia and dust particles in the waste gas are removed, and then the waste gas is emptied or recycled; the waste gas reactor 7 contains dust removal filter cloth layer 8, blowback device 9, multistage ammonia removal filter cloth layer 10 in the interior, dust removal filter cloth layer 8 is arranged in detaching dust and salt granule in the waste gas, blowback device 9 regularly sweeps the dust removal filter cloth layer in order to reach the effect that reduces its gas resistance, multistage ammonia removal filter cloth layer 10 is arranged in the ammonia of catalytic elimination waste gas.
The material of the filter cloth in the dedusting filter cloth layer 8 can be P84, PTFE or PPS.
Wherein, the multistage ammonia removal filter cloth layer 10 can be 1-4 layers, and the thickness of each layer is 3-20 mm.
Wherein, discharge fan 5 chooses the frequency conversion fan for use, adjusts power size through the converter.
In practical application, the exhaust fan 5 forms negative pressure inside the tunnel kiln through the waste gas collecting pipeline 4, collects waste gas discharged from the inside of the tunnel kiln, and conveys the collected waste gas to the waste gas reactor 7; the waste gas entering the waste gas reactor 7 is firstly subjected to dust removal and filtration by the dust removal filter cloth layer 8 to remove dust, dust and salt particles in the waste gas; secondly, removing ammonia gas in the waste gas through the catalysis of a multi-stage ammonia removal filter cloth layer 10; finally, the exhaust gas from which the dust particles and ammonia gas are removed is discharged out of the exhaust gas reactor 7 for exhaustion or reuse.
Wherein, discharge fan 5 chooses the frequency conversion fan for use, adjusts power size through the converter. An inlet measuring point 11 is also arranged on a pipeline connecting the exhaust fan 5 and the waste gas reactor 7, the power of the exhaust fan 5 can be adjusted through the measurement of the ammonia gas concentration at the inlet measuring point 11, and the wind speed is controlled to be 0.5m/s-5 m/s; an outlet point 12 is also arranged on the outlet pipeline of the exhaust gas reactor 7, and the concentration of escaping ammonia can be monitored through the outlet point 12.
Wherein the temperature range of the waste gas is controlled between 80 ℃ and 260 ℃ by controlling the position of the exhaust fan 5. Because the temperature distribution of the denitration catalyst tunnel kiln is in a step-type increase along with the increase of the length of the belt, the temperature of the flue gas discharged from the position closer to the outlet of the tunnel kiln is higher, and the highest temperature can reach 650 ℃. The exhaust fan 5 is arranged at a position close to the inlet by controlling the position of the exhaust fan 5 arranged on the waste gas collecting pipeline 4, so that the working temperature of the deamination filter bag can be ensured to be between 80 ℃ and 260 ℃.
In this embodiment, a large amount of ammonia that releases when calcining honeycomb denitration catalyst 1 in the tunnel kiln passes through exhaust gas reactor 7 after collecting, can obtain effectual purification, and waste gas edulcoration process need not be with the help of media such as water or chemical reagent, escape ammonia and oxygen in the waste gas obtain nitrogen and water through catalytic oxidation under the ammonia removal catalyst effect in multistage ammonia removal filter cloth layer 10, deamination edulcoration technology is easy and simple to handle, and the dust removal effect is good, deamination efficiency is high, tunnel kiln waste gas ammonia escapes more than 90%, the waste gas after the purification is evacuation or reentrant denitration catalyst drying chamber and is carried out the reutilization according to actual conditions.
Wherein, the multi-stage ammonia removal filter cloth layer 10 contains ammonia removal catalyst, for example, the active component is one or more of copper oxide, manganese oxide, cobalt oxide, cerium oxide, copper sulfate and vanadium pentoxide, and the carrier is anatase type nano TiO2Or nano alpha-Al2O3。
The utility model discloses with tunnel kiln waste gas through collecting the back through waste gas reactor 7 remove dust the deamination, enable waste gas and obtain effectual purification, and waste gas edulcoration process need not be with the help of media such as water or chemical reagent, escape ammonia and oxygen in the waste gas obtain nitrogen gas and water through catalytic oxidation reaction under the catalytic action in multistage ammonia filter cloth layer 10 that removes, ammonia edulcoration technology is easy and simple to handle, the dust removal effect is good, the deamination is efficient, tunnel kiln waste gas ammonia escape throughput reaches more than 90%, make the waste gas after the purification can carry out the reutilization according to actual conditions evacuation or reentrant denitration catalyst drying chamber. Meanwhile, the dust removal filter cloth layer 8 is periodically blown and swept by the back blowing device 9, so that the effect of reducing the gas resistance of the dust removal filter cloth layer is achieved, the trapping capacity of the dust removal filter cloth layer 8 is ensured, and the dust removal effect is improved.
The above-mentioned embodiment is only the preferred embodiment of the present invention, not limiting the utility model discloses the range of implementation, the event all the time according to the utility model discloses application for patent scope structure, characteristic and principle do equivalent change or decorate, all should include the utility model discloses in the patent application for scope.
Claims (6)
1. An escaping ammonia treatment device of a tunnel kiln for calcining a denitration catalyst is characterized by comprising a tunnel kiln main body (2), an exhaust gas collecting pipeline (4) arranged in the tunnel kiln main body (2), and an exhaust gas reactor (7) connected to the exhaust gas collecting pipeline (4); a discharge fan (5) is also arranged on the connecting pipeline of the waste gas reactor (7) and the waste gas collecting pipeline (4); the waste gas reactor (7) is internally provided with a dust removal filter cloth layer (8), a back flushing device (9) and a multi-stage ammonia removal filter cloth layer (10) in sequence from an inlet to an outlet.
2. The escaped ammonia treatment apparatus of a tunnel kiln for calcining a denitration catalyst according to claim 1, wherein an inlet point (11) is provided at an inlet pipe of the exhaust gas reactor (7), and an outlet point (12) is provided at an outlet pipe.
3. The escaped ammonia treatment device of a tunnel kiln for calcining a denitration catalyst according to claim 1, wherein a slag discharge port (6) is further provided at the bottom of the exhaust gas reactor (7), and the slag discharge port (6) is provided at the dust removal side of the dust removal filter cloth layer (8).
4. The escaped ammonia treatment apparatus for a tunnel kiln through which a denitration catalyst is calcined according to claim 1, wherein the exhaust gas collecting duct (4) is provided with a collecting branch pipe corresponding to each heating unit of the tunnel kiln, respectively.
5. The escaped ammonia treatment apparatus of a tunnel kiln for calcining a denitration catalyst according to claim 1, wherein the filter cloth of the dust-removing filter cloth layer (8) is made of P84, PTFE or PPS.
6. The escaped ammonia treatment device of a tunnel kiln for calcining a denitration catalyst as claimed in claim 1, wherein the number of the multistage ammonia removal filter cloth layers (10) is 1 to 4, the thickness of each layer is 3mm to 20mm, and the ammonia removal catalyst is attached to the filter cloth substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922263151.7U CN211725347U (en) | 2019-12-16 | 2019-12-16 | Calcination denitration catalyst's escape ammonia processing apparatus of tunnel cave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922263151.7U CN211725347U (en) | 2019-12-16 | 2019-12-16 | Calcination denitration catalyst's escape ammonia processing apparatus of tunnel cave |
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| Publication Number | Publication Date |
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| CN211725347U true CN211725347U (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922263151.7U Active CN211725347U (en) | 2019-12-16 | 2019-12-16 | Calcination denitration catalyst's escape ammonia processing apparatus of tunnel cave |
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| CN (1) | CN211725347U (en) |
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- 2019-12-16 CN CN201922263151.7U patent/CN211725347U/en active Active
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