CN215916737U - High tower granulation tail gas aftertreatment device - Google Patents
High tower granulation tail gas aftertreatment device Download PDFInfo
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- CN215916737U CN215916737U CN202121395114.2U CN202121395114U CN215916737U CN 215916737 U CN215916737 U CN 215916737U CN 202121395114 U CN202121395114 U CN 202121395114U CN 215916737 U CN215916737 U CN 215916737U
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Abstract
The utility model discloses a high tower granulation tail gas post-treatment device which comprises a dust removal chamber (1) and an ammonia removal chamber (2), wherein a filtering unit (11) is arranged in the dust removal chamber (1) and used for filtering dust particles in tail gas, an ozone generating component is arranged in the ammonia removal chamber (2) and used for converting oxygen in air into ozone to react with ammonia in the tail gas, and the dust removal chamber (1) is communicated with the ammonia removal chamber (2) only through the filtering unit (11). The high-tower granulation tail gas post-treatment device provided by the utility model can meet the requirements of efficient dust removal and ammonia removal, and is simple in structure and low in operation cost.
Description
Technical Field
The utility model relates to the technical field of dust removal, in particular to a high tower granulation tail gas post-treatment device.
Background
High tower granulation is a process for producing urea, and the working principle is as follows: and feeding the urea melt into a high tower granulation mechanism for spraying granulation, interacting with gas rising from the tower bottom in the descending process of the high tower, condensing the urea melt into granular solid after heat exchange, and descending the granular solid to the tower bottom, wherein in the process, tail gas generated by high tower granulation comprises air, dust and ammonia gas as main components.
The tail gas post-treatment device in the prior art mainly comprises two modes of bag type dust removal and wet method water washing dust removal, wherein the bag type dust removal mode has higher dust removal efficiency but can not absorb ammonia gas; the wet dedusting spray water or the configured related absorption liquid medicine can remove part of ammonia gas, but the spray water washing system of the wet dedusting spray water or the configured related absorption liquid medicine needs to be added with acid regularly, so that the cost of operation and maintenance is increased, the dedusting efficiency is low, and the phenomenon of flue gas tailing generally exists.
Therefore, how to provide a high tower granulation tail gas aftertreatment device, satisfy high-efficient dust removal and remove ammonia problem simultaneously, and simple structure, the running cost is low, still remains the technical problem that technical staff in the field had a urgent need to solve.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a high-tower granulation tail gas post-treatment device which can simultaneously solve the problems of high-efficiency dust removal and ammonia removal, and has the advantages of simple structure and low operation cost.
In order to solve the technical problem, the utility model provides a high tower granulation tail gas post-treatment device which comprises a dust removal chamber and an ammonia removal chamber, wherein a filtering unit is arranged in the dust removal chamber and used for filtering dust particles in tail gas, an ozone generating component is arranged in the ammonia removal chamber, and the dust removal chamber is communicated with the ammonia removal chamber only through the filtering unit.
Aiming at the problems that the prior art cannot simultaneously meet the requirements of high-efficiency dust removal and ammonia removal and has high operation cost, the high-tower granulation tail gas post-treatment device has a composite structure of dust removal by filtration and ammonia removal by oxidation, tail gas can firstly remove most dust particles through a filtration unit, the tail gas after dust removal enters an ammonia removal chamber along with the tail gas, an ozone generation component is utilized to excite air to generate ozone, the ozone is subjected to oxidation reaction with ammonia in the tail gas, the ammonia in the tail gas is removed, and the granulation tail gas is fully purified.
The equation for the oxidation reaction of ammonia and ozone is as follows:
6NH3+4O3＝3NH4NO3+3H2O
therefore, the high-tower granulation tail gas post-treatment device provided by the utility model meets the requirements of efficient dust removal and ammonia removal, has a simple structure and low operation cost, can convert residual ozone after reaction into oxygen again through catalytic decomposition, does not cause secondary pollution of ozone emission, and is environment-friendly.
Optionally, the ozone generating component comprises an electric field generating unit for generating an electric field to ionize oxygen to form the ozone.
Optionally, the electric field generating unit include a plurality of with tail gas flow direction parallel arrangement's electrode row, it is a plurality of electrode row evenly distributed is in removing the ammonia room, the electrode row includes a plurality of evenly distributed's corona electrode, still includes parallel arrangement in adjacent two between the electrode row, and the electrode row with remove the utmost point of gathering dust between the ammonia room lateral wall, the corona electrode with form between the utmost point of gathering dust the electric field, it is network structure to gather dust very.
Optionally, the ozone generating component comprises an ultraviolet light source.
Optionally, the device further comprises a catalytic decomposition unit, wherein the catalytic decomposition unit is arranged at one end, close to the air outlet, of the inside of the ammonia removal chamber and is used for catalytically decomposing the residual ozone after reaction.
Optionally, the filter unit is a filter bag or a ceramic filter tube.
Optionally, a dust cleaning unit is further included for cleaning the dust attached to the filter unit.
Optionally, the ash removal unit is a pulse blowing part, a spray rinsing part or a mechanical vibration ash removal part.
Optionally, a collecting unit is further disposed inside the dust chamber below the filtering unit, and is used for collecting the dust falling after the dust cleaning unit is cleaned.
Optionally, remove the ammonia room set up in the clean room top, and pass through the outlet intercommunication of filter unit, clean room and air intake intercommunication, remove ammonia room and air outlet intercommunication, air outlet department still is provided with the draught fan for after will handling tail gas introduces the atmosphere.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a high tower granulation tail gas post-treatment apparatus according to the present invention;
FIG. 2 is a schematic structural diagram of an ozone generating component in the high tower granulation tail gas post-treatment device in FIG. 1;
wherein the reference numerals of fig. 1 and 2 are explained as follows:
1-a dust chamber; 11-a filtration unit; 12-a deashing unit; 13-a collection unit;
2-an ammonia removal chamber; a-an electric field; 21 a-corona electrode; 21 b-a dust collecting electrode; 21 c-electric field power supply; 22-a source of ultraviolet light; 23-a catalytic decomposition unit;
3-a partition plate;
4-a draught fan;
01-spraying granulation mechanism.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Here, fig. 2 is a cross-sectional view of the ammonia removal chamber 2 perpendicular to the flow direction of the flue gas, which is perpendicular to the page.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a high tower granulation tail gas post-treatment device provided in the present invention.
The utility model provides a high tower granulation tail gas post-treatment device which comprises a dust removal chamber 1 and an ammonia removal chamber 2, wherein a filtering unit 11 is arranged in the dust removal chamber 1 and used for filtering dust particles in tail gas, an ozone generating component is arranged in the ammonia removal chamber 2 and can convert oxygen in the tail gas into ozone to react with ammonia in the tail gas and remove the ammonia in the tail gas, and the dust removal chamber 1 and the ammonia removal chamber 2 are only communicated through the filtering unit 11.
Aiming at the problems that the prior art cannot simultaneously meet the requirements of high-efficiency dust removal and ammonia removal and has high operation cost, the high-tower granulation tail gas post-treatment device has a composite structure of filtering dust removal and oxidation ammonia removal, tail gas can firstly remove most dust particles through the filtering unit 11, the tail gas after dust removal enters the ammonia removal chamber 2 along with the tail gas, the ozone generation component is utilized to excite air to generate ozone, the ozone is subjected to oxidation reaction with ammonia in the tail gas, the ammonia in the tail gas is removed, and the granulation tail gas is fully purified.
The equation for the oxidation reaction of ammonia and ozone is as follows:
6NH3+4O3＝3NH4NO3+3H2O
therefore, the high-tower granulation tail gas post-treatment device provided by the utility model meets the requirements of efficient dust removal and ammonia removal, has a simple structure and low operation cost, can convert residual ozone after reaction into oxygen again through catalytic decomposition, does not cause secondary pollution of ozone emission, and is environment-friendly.
In this embodiment, tail gas filters the dust removal earlier, carries out the oxidation ammonia removal again, avoids dust particulate matter to adhere to in removing ammonia room 2, influences the effect of removing ammonia. In practical application, it is also feasible to remove ammonia by oxidation first and then filter and remove dust, and at this time, an ash removal component can be arranged in the ammonia removal chamber 2 to remove ash at regular time, so that dust accumulation is avoided, and the ammonia removal effect is influenced. Of course, the arrangement of the present embodiment is simple in structure and is a better embodiment.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an ozone generating component in the high tower granulation tail gas post-treatment device of fig. 1.
In the present invention, the ozone generating part includes an electric field generating unit for generating an electric field a to ionize oxygen to form ozone.
Wherein, electric field generating unit includes a plurality of and tail gas flow direction parallel arrangement's electrode row, and a plurality of electrode row evenly distributed are in removing the ammonia room, and the electrode row includes a plurality of evenly distributed's corona electrode 21a, still includes parallel arrangement between two adjacent electrode rows to and the utmost point 21b that gathers dust between electrode row and the 2 lateral walls of ammonia room, form electric field A between corona electrode 21a and the adjacent utmost point 21b that gathers dust, and utmost point 21b that gathers dust is network structure.
In addition, the ozone generating component further comprises an ultraviolet light source 22 for emitting ultraviolet light with a preset wavelength to irradiate the tail gas so as to convert the oxygen into ozone.
In the embodiment, the electric field generating unit is used for manufacturing the high-voltage corona electric field, so that oxygen molecules in the electric field A generate electrochemical reaction, thereby manufacturing ozone, and the method has mature technology, stable work and large ozone yield; meanwhile, the ultraviolet light sources 22 are arranged on the periphery and the top of the electric field generating unit, and the ozone yield is further improved by adopting an ultraviolet irradiation mode. Dust collection pole 21b sets up to network structure, greatly alleviate electrode structure weight and load, electrode mesh permeable ultraviolet ray for keep away from the tail gas of ultraviolet light source 22 position in the electric field A also can receive the shining of ultraviolet ray, improve ozone output, simultaneously, when this embodiment aftertreatment device sets up inside the prilling tower, it is narrow and small at prilling tower headspace, under the installation condition sensitive to equipment volume and load, space utilization can be improved in the adoption of silk screen electric field, and reduce the load increase volume of tower body.
The embodiment adopts two modes of high-pressure ionization and ultraviolet irradiation to prepare the ozone, and in practical application, the high-pressure ionization or the ultraviolet irradiation can be independently adopted as long as the ammonia removal effect can be ensured. The ultraviolet light source 22 is not limited to the arrangement of the present embodiment, and may be disposed at other positions such as a gap between the field electrodes if the space allows.
In addition, the electric field generating unit further comprises an electric field power supply 21c and a controller, and the voltage and the current of the electrodes can be adjusted by controlling the electric field power supply 21c, so that the yield of ozone is improved.
With reference to fig. 1, the device further includes a catalytic decomposition unit 23, wherein the catalytic decomposition unit 23 is disposed at an end of the ammonia removal chamber 2 near the air outlet, and is used for catalytically decomposing the residual ozone after the reaction.
This setting can effectively avoid ozone direct emission to the atmosphere, causes secondary pollution to the environment. The catalytic decomposition unit 23 may use an ozone adsorption/decomposition catalyst such as activated carbon.
The catalytic decomposition unit 23 is disposed at one end of the ammonia removal chamber 2 close to the air outlet, and besides the arrangement shown in fig. 1, the catalytic decomposition unit 23 may be disposed in the outlet air duct.
Further, in this embodiment, the filtering unit 11 may be a filter bag or a ceramic filter tube, and efficiently intercepts particulate matters in the granulation exhaust gas.
Meanwhile, along with the continuous filtration process, the dust attached to the outer surface of the filter bag or the ceramic filter tube is gradually increased, the resistance of the air flow is gradually increased, and in order not to influence the dust removal effect, an ash removal unit 12 can be further arranged for cleaning the dust accumulated on the filter unit 11.
Specifically, the ash removal unit 12 may be a pulse blowing component, a spray washing component, or a mechanical vibration ash removal component, and the filter unit 11 can be ensured to be always in an optimal working state by controlling the ash removal frequency and the ash removal duration.
As can be seen from fig. 2, in this embodiment, the number of the filter units 11 disposed in the dust removal chamber 1 is plural, the number of the electric field generation units disposed in the ammonia removal chamber 2 is also plural, the filter units 11 correspond to the electric field generation units one to one, the flue gas dedusted by the filter units 11 flows into the corresponding electric field a to be oxidized and removed of ammonia, and the periphery and the top of each electric field generation unit are provided with the plurality of ultraviolet light sources 22.
With continued reference to fig. 1, a collecting unit 13 is further disposed in the dust chamber 1 below the filtering unit 11 for collecting the dust falling from the ash cleaning unit 12 for subsequent treatment.
In this embodiment, remove ammonia room 2 and set up in clean room 1 top to separate through division board 3, only through the export intercommunication of filter unit 11, clean room 1 and air intake intercommunication, remove ammonia room 2 and air outlet intercommunication, air outlet department still is provided with draught fan 4 for introduce the atmosphere with the tail gas after handling.
The dust removal chamber 1 and the ammonia removal chamber 2 are separated by the partition plate 3 to form mutually independent areas, and the ammonia removal by oxidation is carried out after dust removal, so that the dust removal and ammonia removal effects are ensured, and the dust particles are prevented from entering the ammonia removal chamber 2 to influence the ammonia removal effect.
The working process of the high tower granulation tail gas post-treatment device is as follows:
tail gas containing dust particles and ammonia enters a filtering unit 11 at the upper part of a dust removal chamber 1 from an air inlet, the dust particles are filtered and intercepted by the filtering unit 11, the tail gas at the moment flows into an ammonia removal chamber 2 from an outlet of the filtering unit 11 to contact an electric field A, the ammonia in the tail gas can be subjected to the synergistic action of the electric field A and ultraviolet light, and reacts with generated ozone to be removed, and finally the purified tail gas is subjected to catalyst action to remove residual ozone and is exhausted into the atmosphere by an induced draft fan 4; after a large amount of dust is attached to the surface of the filter unit 11, the ash removal unit 12 can be opened to complete ash removal of the filter unit 11, and the falling ash finally enters the collection unit 13 below to be collected and then is subjected to subsequent treatment.
In the embodiment, the post-treatment device for the tail gas of the high-tower granulation is arranged on the upper part of the granulation tower and above the spraying granulation mechanism 01, so that the upper space of the granulation tower is fully utilized, and the space occupation is reduced.
The present invention provides a high tower granulation tail gas after-treatment device, which is described in detail above, and the principle and the implementation of the present invention are explained in the present text by using specific examples, and the above description of the examples is only used to help understanding the method of the present invention and the core idea thereof. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a high tower granulation tail gas aftertreatment device, its characterized in that, includes clean room (1) and removes ammonia room (2), inside filter unit (11) that is provided with of clean room (1) for filter the dust particulate matter in the tail gas, remove the inside ozone generation part that is provided with of ammonia room (2), clean room (1) with remove ammonia room (2) and only pass through filter unit (11) intercommunication.
2. The high tower granulation tail gas aftertreatment device according to claim 1, wherein the ozone generation component comprises an electric field generation unit for generating an electric field (a) to ionize oxygen to form the ozone.
3. The high tower granulation tail gas aftertreatment device of claim 2, characterized in that the electric field generation unit includes a plurality of with tail gas flow direction parallel arrangement's electrode row, a plurality of the electrode row evenly distributed in remove ammonia room (2), the electrode row includes a plurality of evenly distributed's corona electrode (21a), still including parallel arrangement in adjacent two between the electrode row, and the electrode row with remove the dust utmost point (21b) between ammonia room (2) lateral wall, corona electrode (21a) and adjacent form between the dust utmost point (21b) electric field (A), the dust utmost point (21b) are network structure.
4. The tower granulation tail gas aftertreatment device according to claim 1, wherein the ozone generating component comprises an ultraviolet light source (22).
5. The high tower granulation tail gas aftertreatment device according to any one of claims 1 to 4, further comprising a catalytic decomposition unit (23), wherein the catalytic decomposition unit (23) is disposed at one end of the inside of the ammonia removal chamber (2) close to the air outlet, and is used for catalytically decomposing the ozone remaining after the reaction.
6. The high tower granulation exhaust gas after-treatment device according to any one of claims 1 to 4, wherein the filtering unit (11) is a filter bag or a ceramic filter tube.
7. The high tower granulation exhaust gas after-treatment device according to any one of claims 1 to 4, further comprising a dust cleaning unit (12) for cleaning the dust attached to the filtering unit (11).
8. The high tower granulation tail gas after-treatment device according to claim 7, characterized in that the ash removal unit (12) is a pulse blowing component, a spray flushing component or a mechanical vibration ash removal component.
9. The high tower granulation tail gas post-treatment device according to claim 8, characterized in that a collecting unit (13) is further arranged in the dust removing chamber (1) below the filtering unit (11) and used for collecting the dust falling after the dust cleaning unit (12) is cleaned.
10. The high tower granulation tail gas after-treatment device according to any one of claims 1 to 4, wherein the ammonia removal chamber (2) is disposed above the dust removal chamber (1) and is communicated only through the outlet of the filtering unit (11), the dust removal chamber (1) is communicated with the air inlet, the ammonia removal chamber (2) is communicated with the air outlet, and the air outlet is further provided with an induced draft fan (4) for introducing the treated tail gas into the atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121395114.2U CN215916737U (en) | 2021-06-22 | 2021-06-22 | High tower granulation tail gas aftertreatment device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121395114.2U CN215916737U (en) | 2021-06-22 | 2021-06-22 | High tower granulation tail gas aftertreatment device |
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| CN215916737U true CN215916737U (en) | 2022-03-01 |
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| CN202121395114.2U Active CN215916737U (en) | 2021-06-22 | 2021-06-22 | High tower granulation tail gas aftertreatment device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114849434A (en) * | 2022-05-09 | 2022-08-05 | 福建龙净环保股份有限公司 | Prilling tower system and tail gas treatment device |
| CN115178048A (en) * | 2022-08-01 | 2022-10-14 | 浙江嘉源环保科技有限公司 | Dust removal device for separating light materials from construction waste and using method thereof |
-
2021
- 2021-06-22 CN CN202121395114.2U patent/CN215916737U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114849434A (en) * | 2022-05-09 | 2022-08-05 | 福建龙净环保股份有限公司 | Prilling tower system and tail gas treatment device |
| CN115178048A (en) * | 2022-08-01 | 2022-10-14 | 浙江嘉源环保科技有限公司 | Dust removal device for separating light materials from construction waste and using method thereof |
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