CN115779665B - Tail gas purifying system of fluidized bed granulator - Google Patents
Tail gas purifying system of fluidized bed granulator Download PDFInfo
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- CN115779665B CN115779665B CN202310046055.5A CN202310046055A CN115779665B CN 115779665 B CN115779665 B CN 115779665B CN 202310046055 A CN202310046055 A CN 202310046055A CN 115779665 B CN115779665 B CN 115779665B
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Abstract
The invention provides a fluidized bed granulator tail gas purification system, which belongs to the field of granulation tail gas purification, and comprises a granulator and a tail gas emission device, wherein an ammonia removal device is communicated between the granulator and the tail gas emission device, a purification device is also communicated between the ammonia removal device and the tail gas emission device, and a purification component containing adsorbate is arranged in the purification device; the ammonia removal device comprises an ammonia removal box body and a spray pipe, wherein a dilute acid accommodating device is arranged outside the ammonia removal box body, one end of the spray pipe is communicated and connected with the dilute acid accommodating device, and the other end of the spray pipe is arranged inside the ammonia removal box body. According to the tail gas purification system of the fluidized bed granulator, ammonium salt and mixed smoke containing impurities are obtained through ammonia removal treatment on the tail gas, the mixed smoke is further subjected to adsorption and catalytic oxidation treatment through the purification device, clean gas is obtained, dust is recycled through the recovery device, and economic and social benefits are increased while emission indexes are improved.
Description
Technical Field
The invention belongs to the field of granulation tail gas purification, and relates to a tail gas purification system of a fluidized bed granulator.
Background
At present, the water washing technology is mostly adopted for treating the granulated tail gas, the water washing flow is shown in fig. 5, the emission concentration of dust and ammonia can be reduced to a certain extent, but the direct discharge characteristic of the water washing technology is not up to standard, and further, the smoke diffusing capability is greatly reduced due to the fact that a large amount of industrial impurity-containing water vapor is discharged and the discharge temperature is too low, so that regional pollutant enrichment and measured concentration rise, haze is generated under the condition of proper meteorological conditions in severe cases, and the water washing external discharge (small liquid drops) contains a large amount of urea and ammonia and is mostly in the form of aerosol in the atmosphere, so that the haze is a main cause. The problem of tail gas treatment by using the water washing technology is serious, and the water washing technology is only a temporary measure. In addition, the same technical problems exist when the water washing technology is applied to the discharge of the process section of the standard-matching coal-fired boiler.
Disclosure of Invention
Based on the problems existing in the prior art, the invention provides a tail gas purifying system of a fluidized bed granulator, which is characterized in that the tail gas of granulation and the tail gas of a cooling roller are combined and then enter an ammonia removing device, or the tail gas of the granulation and the tail gas of the cooling roller enter the ammonia removing device in sequence, and the flue gas treated by the ammonia removing device enters a purifying device through a pipeline, and is subjected to gas-solid-liquid purification and separation in the purifying device, so that clean gas is obtained and then discharged.
According to the technical scheme provided by the invention, the tail gas purification system of the fluidized bed granulator comprises the granulator and a tail gas emission device, wherein an ammonia removal device is communicated between the granulator and the tail gas emission device, a purification device is communicated between the ammonia removal device and the tail gas emission device, and a purification component containing adsorbate is arranged in the purification device; the ammonia removal device comprises an ammonia removal box body and a spray pipe, wherein a dilute acid accommodating device is arranged outside the ammonia removal box body, one end of the spray pipe is communicated and connected with the dilute acid accommodating device, and the other end of the spray pipe is arranged inside the ammonia removal box body.
Preferably, the spray pipe comprises a main spray pipe and a plurality of sub-spray pipes which are communicated with the main spray pipe and are positioned in the ammonia removal box body, the sub-spray pipes positioned in the ammonia removal box body are provided with a first length sub-spray pipe, a second length sub-spray pipe and a third length sub-spray pipe, the lengths of the first length sub-spray pipe, the second length sub-spray pipe and the third length sub-spray pipe are sequentially increased in the direction away from the dilute acid containing device, the sub-spray pipes with the three lengths are all positioned at the same height, and the lengths of the adjacent sub-spray pipes are different.
Preferably, the sub-spray pipes in the ammonia removal box body are repeatedly arranged along the direction from one side to the other side of the arrangement direction of the sub-spray pipes, wherein the length combinations of the sub-spray pipes are as follows: the first length sub-spray pipe, the second length sub-spray pipe, the third length sub-spray pipe and the second length sub-spray pipe; and the two ends of the arrangement direction of the sub-spray pipes are the sub-spray pipes with the first length.
Preferably, the end of each sub-spray pipe arranged in the ammonia removal box body, which is far away from the dilute acid containing device, is communicated with an atomizer.
Preferably, the purifying device comprises a purifying box body, the purifying box body is connected with the ammonia removing device through a pipeline, a cleaning chamber is arranged at the top of the purifying box body, a plurality of purifying components are vertically arranged in the purifying box body, the top of the purifying component is communicated with the cleaning chamber, a blowing device is arranged at the top of the cleaning chamber, and an exhaust port is further arranged in the cleaning chamber.
Preferably, the purification assembly further has a catalytic oxide thereon.
Preferably, the bottom of the purifying box body is of a steel structure, an ash bucket which is positioned at the bottom of the purifying box body and communicated with the purifying box body is arranged on the steel structure, and a recovery groove is arranged at the bottom of the ash bucket; and a water spraying device is arranged on the purifying device, and a water spraying port of the water spraying device is arranged towards the inner side wall of the ash bucket.
Preferably, an induced draft fan is arranged between the purification device and the tail gas discharge device in a communicated mode, the air inlet end of the induced draft fan is communicated with the exhaust port on the cleaning chamber, and the air outlet end of the induced draft fan is communicated with the tail gas discharge device.
Preferably, the sub-nozzles in the ammonia removal tank are distributed in a sinusoidal shape, so that a part of the ammonia removal tank close to the dilute acid accommodating device and a part far away from the dilute acid accommodating device are distributed with a smaller number of atomizers, and a middle part of the ammonia removal device is distributed with a larger number of atomizers.
Preferably, the dilute acid containing device stores the prepared dilute acid solution in advance, sends the dilute acid solution into an atomizer in the ammonia removal box body through a main spray pipe and a sub spray pipe, compresses protective gas such as carbon dioxide, and atomizes the dilute acid solution to form micro-mist droplets with the size of microns.
Compared with the prior art, the tail gas purifying system of the fluidized bed granulator has the following advantages:
1. according to the tail gas purification system of the fluidized bed granulator, ammonia removal treatment is carried out on granulation tail gas and cooling roller tail gas through dilute acid in the dilute acid accommodating device to obtain ammonium salt, adsorption and catalytic oxidation treatment are further carried out on mixed smoke containing impurities in the ammonia removal device through the purification device to obtain filtered clean gas, ammonia is removed through a semi-dry process technology, dust is purified through a dry process technology, after pollutant treatment, no smoke is carried out on an outlet, no smoke tailing exists, the apparent effect is good, and the emission index is high.
2. The tail gas purification system of the fluidized bed granulator is provided with the matched recovery tank device, and recovery tanks are respectively arranged at the bottoms of the ammonia removal device and the purification device, so that purified dust can be effectively recovered and reused, and the benefit is increased.
Drawings
FIG. 1 is a schematic diagram of the tail gas purification system of the fluid bed granulator of the present invention.
Fig. 2 is a front view of the ammonia removal device of fig. 1.
Fig. 3 is a top view of the ammonia removal device of fig. 1.
Fig. 4 is a front view of the purification apparatus of fig. 1.
Fig. 5 is a schematic diagram of a tail gas water washing process of a granulator in the prior art.
Reference numerals in the drawings:
1. a granulator; 2. a cooler;
3. an ammonia removal device; 31. a dilute acid containment device; 32. an ammonia removal box body; 33. the spray pipes comprise a spray pipe 331, a main spray pipe 332 and a sub-spray pipe; 34. an atomizer;
4. a purifying device; 41. a purifying box body 411 and an air inlet; 42. a cleaning chamber 421 and an exhaust port; 43. a purifying component, 431 and a hanging component; 44. a blowing device; 45. a steel structure; 46. an ash bucket; 47. a recovery tank; 5. an induced draft fan; 6. an exhaust emission device; 7. and (3) a water washing device.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
For the purpose of facilitating an understanding of the embodiments of the invention, reference will now be made to the drawings of several specific embodiments illustrated in the drawings and in no way should be taken to limit the embodiments of the invention.
With reference to fig. 1-4, a specific implementation of the tail gas purification system of the fluid bed granulator of the present invention is presented.
Fig. 1 shows a schematic diagram of a purification flow of a tail gas purification system of a fluidized bed granulator, wherein the tail gas purification system of the fluidized bed granulator comprises a granulator 1 and a tail gas discharge device 6, an ammonia removal device 3 is communicated between the granulator 1 and the tail gas discharge device 6, a purification device 4 is communicated between the ammonia removal device 3 and the tail gas discharge device 6, and a purification assembly 43 containing adsorbate (not shown in the figure) is arranged in the purification device 4.
Wherein, as shown in fig. 2, the ammonia removal device 3 comprises an ammonia removal box 32 and a spray pipe 33, the outside of the ammonia removal box 32 is provided with a dilute acid containing device 31, one end of the spray pipe 33 is connected with the dilute acid containing device 31 in a communicating way, and the other end of the spray pipe 33 is arranged in the ammonia removal box 32. The spray pipe 33 comprises a main spray pipe 331 and a plurality of sub spray pipes 332 which are communicated with the main spray pipe 331 and are positioned in the ammonia removal box 32, wherein the height of the sub spray pipes 332 communicated with the ammonia removal box 32 is positioned at the middle upper part of the ammonia removal box 32, so that the whole ammonia removal device 3 can be filled with dilute acid solution when spraying so as to remove ammonia better; the sub-nozzles 332 located inside the ammonia removal tank 32 have a first length sub-nozzle, a second length sub-nozzle, and a third length sub-nozzle, which are sequentially increased in length in a direction away from the dilute acid containing device 31, the three length sub-nozzles 332 are all located at the same height, and the lengths of the adjacent sub-nozzles 332 are different.
In a preferred embodiment, as shown in FIG. 3, the sub-nozzles 332 in the ammonia removal tank 32 are arranged in a repetitive arrangement of the following combinations of lengths of the sub-nozzles 332, along one side to the other side of the arrangement of the sub-nozzles 332: the first length sub-spray pipe, the second length sub-spray pipe, the third length sub-spray pipe and the second length sub-spray pipe; and the two ends of the arrangement direction of the sub-spray pipes 332 are the sub-spray pipes 332 with the first length.
Further, an atomizer 34 is provided in communication with the end of each of the sub-nozzles 332 provided in the ammonia removal tank 32 remote from the dilute acid containing device 31.
As shown in fig. 3, three groups of "first length sub-nozzles, second length sub-nozzles, third length sub-nozzles, and second length sub-nozzles" sub-nozzles 332 are sequentially arranged, and finally, the first length sub-nozzles 332 are further arranged at the end portion close to the ammonia removal box 32, so as to obtain the sub-nozzle arrangement in the top view of fig. 3, and it can also be seen that the sub-nozzles 332 in the ammonia removal box 32 are distributed in a sine shape, so that the part close to the dilute acid containing device 31 and the part far away from the dilute acid containing device 31 in the ammonia removal box 32 are distributed with fewer atomizers 34, and the middle part of the ammonia removal device 3 is distributed with more atomizers 34, so that the spraying amounts at two sides can be conveniently adjusted, so that each position in the whole ammonia removal box 32 is filled with dilute acid solution, and ammonia in the tail gas is fully dissolved. Of course, in other embodiments, the sub-spray pipes can also be distributed in a cosine shape, and the atomizer can conveniently and uniformly spray dilute acid to the whole ammonia removal box body.
In the specific operation of the tail gas purification system of the fluidized bed granulator, a prepared dilute acid solution, such as saturated carbonic acid solution or 5% sulfuric acid solution, is stored in the dilute acid containing device 31 in advance, is sent into the atomizer 34 in the ammonia removal box 32 through the main spray pipe 331 and the sub spray pipes 332, is compressed to protect gas, such as carbon dioxide, and atomizes the dilute acid solution to form micro mist droplets with the size of microns, and the mist droplets have large specific surface area, can dissolve ammonia in the granulation tail gas entering the ammonia removal box 32 and the tail gas of the cooler 2 and react with the ammonia to generate ammonium salts, such as ammonium bicarbonate or ammonium sulfate. In the flowing process of the tail gas, partial liquid drops are gradually dehydrated to become salt particles and urea dust, and the temperature of the tail gas is reduced. The ammonium salt after reaction has two directions: a part of heavy particles fall to a recovery tank (not shown) at the bottom of the ammonia removal tank 32 and are recovered by warm water flushing; and the other part of fine particles enter a subsequent purifying device 4 for further treatment under the driving of the air flow.
Further, as shown in fig. 4, the purifying device 4 includes a purifying box 41, the purifying box 41 is connected with the ammonia removing device 3 through a pipeline, a cleaning chamber 42 is arranged at the top of the purifying box 41, and a plurality of vertically arranged purifying components 43 are arranged in the purifying box 41, so that only one purifying component 43 is shown in fig. 4 for making the drawing clean, and the purifying components 43 are arranged in the purifying box 41 and can be fully combined with the tail gas entering the purifying box 41; the top of the cleaning module 43 is in communication with the cleaning chamber 42, wherein a suspension module 431 is further provided in the top cleaning chamber 42 of the cleaning module 43 to fixedly suspend the top of the cleaning module 43 in the cleaning chamber 42, a blowing device 44 is further provided in the top of the cleaning chamber 42, and an exhaust port 421 is further provided in the cleaning chamber 42. Wherein the purification assembly 43 has catalytic oxide (not shown) thereon in addition to the adsorbate. The bottom of the purifying box body 41 is a steel structure 45, an ash bucket 46 which is positioned at the bottom of the purifying box body 41 and is communicated with the purifying box body 41 is arranged on the steel structure 45, and a recovery groove 47 is also arranged at the bottom of the ash bucket 46; and a water spraying device is arranged on the purifying device 4, and a water spraying port of the water spraying device is arranged towards the inner side wall of the ash bucket 46.
In another embodiment, an induced draft fan 5 is further disposed between the purifying device 4 and the exhaust gas discharging device 6, an air inlet end of the induced draft fan 5 is communicated with an air outlet 421 on the cleaning chamber 42, and an air outlet end of the induced draft fan 5 is communicated with the exhaust gas discharging device 6.
Specifically, as shown in FIG. 4, the granulation tail gas and the tail gas of the cooler 2 are subjected to an ammonia removal device3, the treated mixed flue gas containing fine particles enters the purifying box 41 through the air inlet 411 of the purifying box 41, urea dust and ammonium salt particles contained in the entering flue gas are separated by the purifying component 43 in a gas-solid manner, and dust particles are trapped on the outer surface of the purifying component 43. The purification component 43 is provided with adsorbate and catalytic oxide, and the residual ammonia in the mixed tail gas is trapped or catalytically oxidized into H through the adsorption function and the catalytic oxidation function 2 O and N 2 And further, the clean gas after filtration enters a clean room, and is sent to an exhaust emission device 6 such as a chimney from an exhaust port 421 of the clean room 42 through a draught fan 5 to be discharged.
And as shown in fig. 4, after the mixed flue gas is adsorbed and catalytically oxidized by the purifying component 43 in the purifying box 41, the dust collected on the surface of the purifying component 43 is gradually thickened, and when the thickness reaches a certain value, the spraying device 44 is started to spray downwards for reversely cleaning dust, so that the dust on the surface of the purifying component 43 falls into the ash bucket 46 at the bottom downwards, and the purifying component 43 can be regenerated. The dust in the ash bucket 46 is further sprayed and washed by a water spraying device with a water spraying port aligned to the inner side wall of the ash bucket 46 and then enters the recovery tank 47, and when the collected liquid in the recovery tank 47 reaches a certain concentration, the collected liquid is pumped to a down-channel device for recovery and reutilization.
The tail gas purifying system adopts the advanced semi-dry process to remove ammonia, the dry process is used for purifying dust, pollutants in tail gas are removed through double treatment, an exhaust outlet has no smoke liquid, no tail gas and good apparent effect, the emission index is higher than the national standard, meanwhile, the dust is effectively recycled, and the annual increase of income is considerable.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (8)
1. The tail gas purification system of the fluid bed granulator comprises a granulator (1) and a tail gas discharge device (6) and is characterized in that ammonia is eliminated by adopting a semi-dry process, an ammonia removal device (3) is communicated between the granulator (1) and the tail gas discharge device (6), a purification device (4) is communicated between the ammonia removal device (3) and the tail gas discharge device (6), and a purification component (43) containing adsorbate is arranged in the purification device (4); the mixed flue gas containing fine particles, which is treated by the ammonia removal device in the granulation tail gas and the cooler tail gas, enters the purification box body through the air inlet of the purification box body through the pipeline, urea dust and ammonium salt particles contained in the entering flue gas are separated by the gas-solid separation of the purification assembly, and dust particles are trapped on the outer surface of the purification assembly;
the ammonia removal device (3) comprises an ammonia removal box body (32) and a spray pipe (33), wherein a dilute acid accommodating device (31) is arranged outside the ammonia removal box body (32), one end of the spray pipe (33) is communicated and connected with the dilute acid accommodating device (31), and the other end of the spray pipe (33) is arranged inside the ammonia removal box body (32);
the purifying device (4) comprises a purifying box body (41), the purifying box body (41) is communicated and connected with the ammonia removing device (3) through a pipeline, a cleaning chamber (42) is arranged at the top of the purifying box body (41), a plurality of vertically arranged purifying assemblies (43) are arranged in the purifying box body (41), the top of each purifying assembly (43) is communicated with the cleaning chamber (42), a blowing device (44) is further arranged at the top of each cleaning chamber (42), and an exhaust port (421) is further arranged at the top of each cleaning chamber (42); the purification assembly (43) has a catalytic oxide;
the spray pipe (33) comprises a main spray pipe (331) and a plurality of sub-spray pipes (332) which are communicated with the main spray pipe (331) and are positioned in the ammonia removal box body (32), the sub-spray pipes (332) positioned in the ammonia removal box body (32) are provided with a first length sub-spray pipe (332), a second length sub-spray pipe (332) and a third length sub-spray pipe (332) which are sequentially increased in length in the direction away from the dilute acid containing device (31), the sub-spray pipes (332) with three lengths are positioned at the same height, and the lengths of the adjacent sub-spray pipes (332) are different; in the direction from one side to the other side of the arrangement direction of the sub-spray pipes (332), the sub-spray pipes (332) in the ammonia removal box body (32) are repeatedly arranged in the length combination of the following sub-spray pipes (332):
the first length sub-spray pipe, the second length sub-spray pipe, the third length sub-spray pipe and the second length sub-spray pipe;
the two ends of the sub-spray pipes (332) in the arrangement direction are the sub-spray pipes (332) with the first length; the three groups of first length sub-spray pipes, second length sub-spray pipes, third length sub-spray pipes and second length sub-spray pipes in the ammonia removal box body (32) are sequentially arranged, and finally, the sub-spray pipes with the first length are arranged at the end part close to the ammonia removal box body; a hanging component is arranged in the cleaning room at the top of the purifying component so as to fixedly hang the top of the purifying component in the cleaning room;
an atomizer (34) is communicated with the end part of each sub-spray pipe (332) which is arranged in the ammonia removal box body (32) and is far away from the dilute acid accommodating device (31); the dilute acid containing device is used for storing the prepared dilute acid solution in advance, sending the dilute acid solution into an atomizer in the ammonia removal box body through a main spray pipe and a sub spray pipe, compressing protective gas such as carbon dioxide, and atomizing the dilute acid solution to form micro mist drops with the size of a micron.
2. The tail gas purification system of the fluidized bed granulator according to claim 1, wherein the bottom of the purification box body (41) is a steel structure (45), an ash bucket (46) which is positioned at the bottom of the purification box body (41) and is communicated with the purification box body (41) is arranged on the steel structure (45), and a recovery groove (47) is further arranged at the bottom of the ash bucket (46); and a water spraying device is arranged on the purifying device (4), and a water spraying port of the water spraying device is arranged towards the inner side wall of the ash bucket (46).
3. The tail gas purification system of the fluidized bed granulator according to claim 2, wherein a draught fan (5) is communicated between the purification device (4) and the tail gas discharge device (6), the air inlet end of the draught fan (5) is communicated with an exhaust port (421) on the cleaning chamber (42), and the air outlet end of the draught fan (5) is communicated with the tail gas discharge device (6).
4. A fluid bed granulator tail gas purification system according to claim 3, wherein the spray pipes in the ammonia removal box are distributed in a sine shape, so that the part of the ammonia removal box close to the dilute acid accommodating device and the part far away from the dilute acid accommodating device are distributed with a smaller number of atomizers, and the middle part of the ammonia removal device is distributed with a larger number of atomizers.
5. A fluid bed granulator tail gas purification system according to claim 3, wherein the purification module comprises an adsorbate and a catalytic oxide, and the ammonia remaining in the mixed tail gas is captured or catalytically oxidized to H by the adsorption function and the catalytic oxidation function 2 O and N 2 。
6. The tail gas purification system of the fluidized bed granulator according to claim 5, wherein the filtered clean gas enters a clean room and is sent to a chimney and other tail gas discharge devices from an exhaust port of the clean room through a draught fan to be discharged.
7. The tail gas purification system of a fluid bed granulator according to claim 6, wherein after the mixed flue gas is adsorbed and catalytically oxidized by the purification component in the purification box body, the dust collected on the surface of the purification component is gradually thickened, and when the thickness is reached, the spraying device is started to spray downwards to reversely clean the dust, so that the dust on the surface of the purification component falls into the ash bucket at the bottom downwards.
8. The tail gas purification system of a fluid bed granulator according to claim 7, wherein dust in the ash bucket is further sprayed and washed by a water spraying device with a water spraying port aligned with the inner side wall of the ash bucket, and then enters the recovery tank, and when the collected liquid in the recovery tank reaches a certain concentration, the collected liquid is pumped to a down-channel device for recovery and reuse.
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| DE202008018318U1 (en) * | 2008-02-27 | 2012-11-27 | Basf Corporation | Copper-Cha-zeolite catalysts |
| WO2020174559A1 (en) * | 2019-02-26 | 2020-09-03 | 三菱重工エンジニアリング株式会社 | Off gas processing device and fertilizer production plant provided with this off gas processing device |
| WO2022095148A1 (en) * | 2020-11-03 | 2022-05-12 | 江南环保集团股份有限公司 | Method for applying membrane separation apparatus to ammonia desulfurization |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202933617U (en) * | 2012-09-21 | 2013-05-15 | 中国五环工程有限公司 | Ammoniated tail gas treatment system for fluidized bed large granular urea device |
| CN112221333A (en) * | 2020-09-25 | 2021-01-15 | 山东圣大环保工程有限公司 | Ammonia-containing waste gas absorption, purification and recovery device |
| CN112704971B (en) * | 2021-03-29 | 2021-07-16 | 上海境业环保能源科技股份有限公司 | Granulation tower total pollution treatment system |
| CN114849434B (en) * | 2022-05-09 | 2023-06-16 | 福建龙净环保股份有限公司 | Prilling tower system and tail gas treatment device |
| CN115090091B (en) * | 2022-06-28 | 2024-01-30 | 光大环保技术研究院（深圳）有限公司 | Device and method for removing escaped ammonia in waste incineration flue gas by using citric acid |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202008018318U1 (en) * | 2008-02-27 | 2012-11-27 | Basf Corporation | Copper-Cha-zeolite catalysts |
| WO2020174559A1 (en) * | 2019-02-26 | 2020-09-03 | 三菱重工エンジニアリング株式会社 | Off gas processing device and fertilizer production plant provided with this off gas processing device |
| WO2022095148A1 (en) * | 2020-11-03 | 2022-05-12 | 江南环保集团股份有限公司 | Method for applying membrane separation apparatus to ammonia desulfurization |
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