CN216367383U - Dual cycle denitration spray tower - Google Patents
Dual cycle denitration spray tower Download PDFInfo
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- CN216367383U CN216367383U CN202121619085.3U CN202121619085U CN216367383U CN 216367383 U CN216367383 U CN 216367383U CN 202121619085 U CN202121619085 U CN 202121619085U CN 216367383 U CN216367383 U CN 216367383U
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Abstract
The utility model discloses a dual-cycle denitration spray tower, which comprises a spray tower body, a first spray layer, a second spray layer and a liquid collection assembly, wherein: the liquid collecting component comprises a gas distribution plate and a plurality of liquid collecting tanks, wherein the gas distribution plate is provided with a plurality of gas distribution holes so that gas below the gas distribution plate enters the upper part of the gas distribution plate through the gas distribution holes, liquid above the gas distribution plate enters the lower part of the gas distribution plate through the gas distribution holes, the liquid collecting tanks are respectively arranged below the gas distribution holes and are used for receiving the liquid falling from the gas distribution holes, and gaps are arranged between the liquid collecting tanks and the gas distribution plate so that the gas below the liquid collecting tanks flows into the gas distribution holes. According to the utility model, the first spraying layer and the second spraying layer are adopted to sequentially spray the gas in the spraying tower body for two times, so that the gas denitration effect is improved, and the gas distribution plate is provided with the gas distribution holes and the liquid collection grooves corresponding to the gas distribution holes, so that the gas transmittance can be increased, and the serious disturbed gas flow caused by the narrow gas flow channel is reduced.
Description
Technical Field
The utility model relates to the technical field of denitration devices, in particular to a double-circulation denitration spray tower.
Background
The flue gas discharged by the furnace type work of an incinerator, a kiln and the like contains various pollutants such as nitrogen oxides, sulfides and the like, and the air pollution can be caused by direct discharge, and the flue gas is required to be discharged after being subjected to desulfurization, denitrification and dust removal treatment and reaching the standard.
Generally this kind of tail gas can adopt wet-type denitration spray column to carry out tail gas treatment, and current application number is CN201620428964.0, and the patent of the patent name "a two segmentation denitrification facility that realize near zero release" provides a two segmentation denitrification facility that realize near zero release, includes: a primary denitration device and a secondary denitration device; the first-stage denitration device comprises: the denitration device comprises an inlet flue, an ammonia injection grid and a denitration reactor, wherein the inlet flue, the ammonia injection grid and the denitration reactor are sequentially connected; the second grade denitrification facility includes: the denitration reactor comprises a middle flue communicated with the denitration reactor, an ozone grid arranged in the middle flue, a tower body communicated with the middle flue, and a denitration spraying layer arranged in the tower body. Ozone is sprayed into the flue gas, and the residual nitrogen oxide in the flue gas after denitration is oxidized into high-valence nitrogen oxide which is easily absorbed by the solution. Finally, the zero emission level of the nitrogen oxide is achieved. Meanwhile, a two-stage denitration method for realizing near zero emission based on the device is provided. The two-section separation type spray tower is adopted, the structure is complex, and the manufacturing cost and the maintenance cost are high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the technical defects and provides a double-circulation denitration spray tower which is used for solving the problem that a denitration device in the prior art is not favorable for cost control due to a separated structure.
In order to achieve the technical purpose, the technical scheme of the utility model is as follows: the utility model provides a dual cycle denitration spray column, its includes spray tower body, the first layer that sprays, the second sprays layer and album liquid subassembly, wherein: the spray tower is hollow and forms a spray cavity, the first spray layer, the liquid collecting assembly and the second spray layer are all arranged in the spray cavity, the first spray layer is positioned below the second spray layer, and the liquid collecting assembly is positioned between the first spray layer and the second spray layer; the liquid collecting component comprises a gas distribution plate and a plurality of liquid collecting grooves, wherein the gas distribution plate is provided with a plurality of gas distribution holes so that gas below the gas distribution plate can enter the upper part of the gas distribution plate through the gas distribution holes, liquid above the gas distribution plate enters the lower part of the gas distribution plate through the gas distribution holes, the liquid collecting grooves are respectively arranged below the gas distribution holes and are used for receiving the liquid falling from the gas distribution holes, and gaps are formed between the liquid collecting grooves and the gas distribution plate so that the gas below the liquid collecting grooves can flow into the gas distribution holes.
Preferably, the double-circulation denitration spray tower further comprises a first circulating pump, and the first circulating pump is respectively connected with the bottom of the spray tower and the first spray layer through a pipeline so as to extract the liquid at the bottom of the spray tower to the first spray layer.
Preferably, the double-circulation denitration spray tower further comprises a circulation tank and a second circulation pump, the liquid collecting tank is connected with the circulation tank through a pipeline so that liquid in the liquid collecting tank flows to the circulation tank, and the second circulation pump is respectively connected with the circulation tank and the second spray layer through a pipeline so as to pump the liquid in the circulation tank to the second spray layer.
Preferably, the liquid collecting assembly further comprises a plurality of liquid collecting pipes, one end of each liquid collecting pipe is communicated with the bottom of the liquid collecting tank, the other end of each liquid collecting pipe is communicated with the circulating pool, so that liquid in the liquid collecting tank can enter the circulating pool, and the liquid collecting tank is fixedly connected with the liquid collecting pipes between the inner side walls of the spray tower body.
Preferably, the upper end of the air distribution hole is conical.
Preferably, the bottom of the liquid collecting tank is conical.
Preferably, the air distribution holes are uniformly distributed on the air distribution plate.
Preferably, the dual-cycle denitration spray tower further comprises a cyclone, and the exhaust end of the cyclone is connected with the air inlet end of the spray tower body through a pipeline.
Preferably, the dual-cycle denitration spray tower further comprises a drying box, and the solid discharge end of the cyclone is connected with the pipeline at the feed end of the drying box.
Preferably, the dual-cycle denitration spray tower further comprises a flat plate type demister, the flat plate type demister is arranged in the spray cavity, and the flat plate type demister is located above the second spray layer.
Compared with the prior art, the utility model has the beneficial effects that: adopt first spraying layer and second to spray the layer and carry out twice spraying to the internal gas of spray column in proper order, improve gaseous denitration effect, the liquid of gas distribution board top assembles in the catch basin through the gas distribution hole, and the gas of catch basin below upwards gets into the gas distribution hole through the clearance between catch basin and the gas distribution board, because the gas distribution board is seted up the gas distribution hole and is a plurality of with the catch basin that the gas distribution hole corresponds, can increase the gas permeability, reduce because the narrow serious disturbance air current that brings of gas flow channel.
Drawings
FIG. 1 is a schematic structural diagram of a double-circulation denitration spray tower provided by the utility model;
reference numerals: 1-a spray tower body, 2-a first spray layer, 3-a second spray layer, 4-a liquid collecting component, 5-a first circulating pump, 6-a circulating pool, 7-a second circulating pump, 8-a swirler, 9-a drying box, 10-a flat plate type demister, 11-a spray chamber, 41-a gas distribution plate, 42-a liquid collecting tank, 43-a liquid collecting pipe and 411-a gas distribution hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1, the present embodiment provides a dual cycle denitration spray tower, which includes a spray tower body 1, a first spray layer 2, a second spray layer 3 and a liquid collecting assembly 4, wherein the spray tower body 1 is used for connecting and bearing the first spray layer, the second spray layer 3 and the liquid collecting assembly 4, the first spray layer 2 and the second spray layer 3 spray the gas in the spray tower body 1, the liquid collecting assembly 4 provides gas flow, and collects the liquid falling from the second spray layer 3, wherein:
spray tower cavity and form and spray chamber 11, first spray layer 2, collect liquid subassembly 4 and second and spray layer 3 and all set up spraying in chamber 11, and first spray layer 2 is located the second and sprays layer 3 below, the gas flows from bottom to top in the spray tower body 1, therefore gas at first sprays layer 2 through first and sprays, spray layer 3 through the second and spray, collect liquid subassembly 4 and be located first spray layer 2 and the second sprays between layer 3, the gas of collecting liquid subassembly 4 below can flow to the top, and the liquid of collecting liquid subassembly 4 top can be collected by collection liquid subassembly 4.
Specifically, the liquid collecting assembly 4 includes a gas distribution plate 41 and a plurality of liquid collecting grooves 42, the gas distribution plate 41 is provided with a plurality of gas distribution holes 411 for allowing gas below the gas distribution plate 41 to enter the upper side of the gas distribution plate 41 through the gas distribution holes 411, liquid above the gas distribution plate 41 enters the lower side of the gas distribution plate 41 through the gas distribution holes 411, the plurality of liquid collecting grooves 42 are respectively arranged below the plurality of gas distribution holes 411 and are used for receiving liquid falling from the gas distribution holes 411, and a gap is arranged between the liquid collecting grooves 42 and the gas distribution plate 41 for allowing gas below the liquid collecting grooves 42 to flow into the gas distribution holes 411. The liquid collecting assembly 4 further comprises a plurality of liquid collecting pipes 43, one end of each liquid collecting pipe 43 is communicated with the bottom of the liquid collecting groove 42, the other end of each liquid collecting pipe 43 is communicated with the circulating pool 6, liquid in the liquid collecting groove 42 enters the circulating pool 6, and the liquid collecting groove 42 is fixedly connected with the inner side wall of the spray tower body 1 through the liquid collecting pipes 43. The header pipes 43 have a function of fixing the header tanks 42 in addition to collecting and conveying the liquid in the plurality of header tanks 42 to the circulation tank 6, and therefore the header pipes 43 are generally made of a hard material, and the header pipes 43 are directly fixed to the inner wall of the spray tower.
Further, this dual cycle denitration spray tower still includes first circulating pump 5, and first circulating pump 5 respectively with spray the bottom of the tower and first 2 pipe connections that spray to the extraction sprays bottom of the tower liquid to first layer 2 that sprays.
Further, this dual cycle denitration spray tower still includes circulation tank 6 and second circulating pump 7, and collecting tank 42 and 6 pipe connections in circulation tank to supply liquid flow to circulation tank 6 in the collecting tank 42, second circulating pump 7 sprays layer 3 pipe connection with circulation tank 6 and second respectively, sprays layer 3 with the extraction circulation tank 6 in liquid to the second.
In a preferred embodiment, the upper end of the gas distribution hole 411 is tapered, so that the liquid receiving area on the surface of the gas distribution plate 41 is enlarged to promote the flow of the liquid, and the gas entering the gas distribution hole 411 from the lower part of the gas distribution plate 41 can be well diffused at the tapered opening.
In a preferred embodiment, the bottom of the sump 42 is conical, and the gas in the bottom of the sump 42 will flow upward along the sides of the sump 42, reducing turbulence in the gas flow.
As a preferred embodiment, the air distribution holes 411 are uniformly arranged on the air distribution plate 41, so that the diffusion distance between the gases overflowing from the respective air distribution holes 411 is the same, and the disturbance of the gas flow is reduced.
In a preferred embodiment, the dual-cycle denitration spray tower further comprises a cyclone 8, and the exhaust end of the cyclone 8 is connected with the air inlet end of the spray tower body 1 through a pipeline. The cyclone 8 is used for separating the tail gas, wherein the gas enters the spray tower to be sprayed twice and is finally discharged from the top of the spray tower.
As a preferred embodiment, the double-circulation denitration spray tower also comprises a drying box 9, and the solid discharge end of the cyclone 8 is connected with the feeding end of the drying box 9 through a pipeline. The purpose of which is to dry and collect the solids separated by cyclone 8.
As a preferred embodiment, the dual-cycle denitration spray tower further comprises a flat plate type demister 10, wherein the flat plate type demister 10 is arranged in the spray chamber 11, and the flat plate type demister 10 is positioned above the second spray layer 3. The water-absorbing agent has the functions of absorbing water vapor in the gas after twice spraying and reducing the water vapor to be discharged into the atmosphere.
In the following, a brief explanation is made on the working principle of the dual-circulation denitration spray tower provided by the present invention, a denitration liquid is prepared in advance in the circulation tank 6 and the spray tower body 1, then the first circulation pump 5 and the second circulation pump 7 are started, the denitration liquid enters the first spray layer 2 through the first circulation pump 5, enters the second spray layer 3 through the second circulation pump 7, and the denitration liquid is atomized into mist-like vapor by the first spray layer 2 and the second spray layer 3 and fills the mist-like vapor in the spray tower body 1. The flue gas containing nitrate to be treated discharged from a furnace body firstly removes most particulate matters through the cyclone 8, solid particles enter a dryer for drying and collecting, the gas enters through the side surface of the spray tower body 1, the flue gas continuously moves upwards in the spray tower body 1 to contact with denitration liquid of mist-shaped gas, denitration reaction is started, the denitration liquid of the mist-shaped gas is gradually gathered at the spray tower body 1 under the action of gravity, wherein fog drops of a first spray layer 2 are gathered at the bottom of the spray tower body 1, fog drops of a second spray layer 3 fall on the gas distribution plate 41, then enter the liquid collection tank 42 through the gas distribution holes 411, enter the circulating pool 6 through the liquid collection pipe 43, the denitration liquid at the bottom of the spray tower body 1 is extracted by the first circulating pump 5 and conveyed to the first spray layer 2 for re-atomization again, the denitration liquid in the circulating pool 6 is extracted by the second circulating pump 7 and conveyed to the second spray layer 3 for re-atomization again and continuously contacts with the subsequent flue gas to be treated for denitration reaction, denitration liquid is at spray tower body 1, first circulating pump 5 and the first circulation motion that sprays between layer 2, sprays layer 3 at circulation pond 6, second circulating pump 7 and second simultaneously, and then constitutes complete circulation deNOx systems. The flue gas after twice spraying denitration continues to go upward and is demisted and dehumidified by the flat plate type demister 10, and is discharged through the exhaust port arranged at the top of the spraying tower, so that denitration, desulfuration and purification treatment is completed.
In summary, according to the dual-cycle denitration spray tower provided by the utility model, the first spray layer and the second spray layer are adopted to sequentially spray the gas in the spray tower body for two times, so that the denitration effect of the gas is improved, the liquid above the gas distribution plate is gathered in the liquid collecting tank through the gas distribution holes, and the gas below the liquid collecting tank upwards enters the gas distribution holes through the gap between the liquid collecting tank and the gas distribution plate.
The above embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a dual cycle denitration spray tower, its characterized in that sprays layer and album liquid subassembly including spray tower body, first spraying, second, wherein:
the spray tower is hollow and forms a spray cavity, the first spray layer, the liquid collecting assembly and the second spray layer are all arranged in the spray cavity, the first spray layer is positioned below the second spray layer, and the liquid collecting assembly is positioned between the first spray layer and the second spray layer;
the liquid collecting component comprises a gas distribution plate and a plurality of liquid collecting grooves, wherein the gas distribution plate is provided with a plurality of gas distribution holes so that gas below the gas distribution plate can enter the upper part of the gas distribution plate through the gas distribution holes, liquid above the gas distribution plate enters the lower part of the gas distribution plate through the gas distribution holes, the liquid collecting grooves are respectively arranged below the gas distribution holes and are used for receiving the liquid falling from the gas distribution holes, and gaps are formed between the liquid collecting grooves and the gas distribution plate so that the gas below the liquid collecting grooves can flow into the gas distribution holes.
2. The dual-cycle denitration spray tower of claim 1, further comprising a first circulation pump, wherein the first circulation pump is respectively connected with the bottom of the spray tower and the first spray layer for pumping the liquid from the bottom of the spray tower to the first spray layer.
3. The dual-cycle denitration spray tower of claim 1, further comprising a circulation tank and a second circulation pump, wherein the liquid collecting tank is connected with the circulation tank through a pipeline so that liquid in the liquid collecting tank flows to the circulation tank, and the second circulation pump is respectively connected with the circulation tank and the second spray layer through a pipeline so as to pump the liquid in the circulation tank to the second spray layer.
4. The dual-cycle denitration spray tower of claim 3, wherein the liquid collecting assembly further comprises a plurality of liquid collecting pipes, one end of each liquid collecting pipe is communicated with the bottom of the liquid collecting tank, the other end of each liquid collecting pipe is communicated with the circulation tank, so that liquid in the liquid collecting tank can enter the circulation tank, and the liquid collecting tank is fixedly connected with the inner side wall of the spray tower body through the liquid collecting pipes.
5. The dual-cycle denitration spray tower of claim 1, wherein the upper end of the gas distribution hole is tapered.
6. The dual cycle denitration spray tower of claim 1, wherein the sump bottom is conical.
7. The dual-cycle denitration spray tower of claim 1, wherein the gas distribution holes are uniformly arranged on the gas distribution plate.
8. The dual-cycle denitration spray tower of claim 1, further comprising a cyclone, wherein an exhaust end of the cyclone is in pipeline connection with an inlet end of the spray tower body.
9. The dual-cycle denitration spray tower of claim 8 further comprising a drying box, wherein the solids discharge end of the cyclone is in pipe connection with the feed end of the drying box.
10. The dual-cycle denitration spray tower of claim 1, further comprising a plate mist eliminator disposed within the spray chamber and above the second spray level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121619085.3U CN216367383U (en) | 2021-07-15 | 2021-07-15 | Dual cycle denitration spray tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121619085.3U CN216367383U (en) | 2021-07-15 | 2021-07-15 | Dual cycle denitration spray tower |
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| Publication Number | Publication Date |
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| CN216367383U true CN216367383U (en) | 2022-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121619085.3U Active CN216367383U (en) | 2021-07-15 | 2021-07-15 | Dual cycle denitration spray tower |
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| CN (1) | CN216367383U (en) |
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2021
- 2021-07-15 CN CN202121619085.3U patent/CN216367383U/en active Active
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