CN115715923A - Smoke purifying device for smelting decontamination plant - Google Patents
Smoke purifying device for smelting decontamination plant Download PDFInfo
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- CN115715923A CN115715923A CN202211555865.5A CN202211555865A CN115715923A CN 115715923 A CN115715923 A CN 115715923A CN 202211555865 A CN202211555865 A CN 202211555865A CN 115715923 A CN115715923 A CN 115715923A
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Abstract
The invention relates to a smoke purifying device for a smelting decontamination factory building. The invention is provided with the supergravity purification part, the spraying pressing part and the strengthening spraying part, smoke is introduced from the smoke inlet, and large particle pollutants in the smoke are removed through full contact and mass transfer with small water drops sprayed out from a liquid drop outlet of the supergravity purification part; the flue gas after the supergravity purification enters a first flow guide channel of the spraying pressing part through an air duct, and can effectively capture submicron radioactive aerosol contained in the flue gas through the mass transfer process with a large amount of aerosol pressing agent sprayed by a first spraying device, so that the collection and the treatment are convenient; then, the flue gas after being sprayed, pressed and purified enters a second diversion channel of the strengthened spraying part under the action of the pressure of the flue gas, and residual sulfide in the flue gas is removed through the mass transfer process with a large amount of high-concentration alkali liquor sprayed out of a second spraying device.
Description
Technical Field
The invention belongs to the technical field of flue gas purification, and particularly relates to a flue gas purification device for a smelting decontamination factory building.
Background
The radioactive waste metal smelting decontamination is an important decontamination technology in the decommissioning process of the nuclear industry, contaminated metals and fluxing agents with specific components are smelted together by selecting corresponding furnace types for slagging, most of radioactive nuclides in wastes are enriched in furnace slag and filter dust, and then radioactive removal is carried out by slagging off, or a reasonable furnace lining formula is adopted to adsorb part of the radioactive nuclides, so that the purpose of purifying the metal wastes is achieved. A large amount of smoke is generated in the smelting process, and the smoke is rich in radioactive aerosol.
The smelting plant uses a traditional spray tower or a bag type dust collector when purifying flue gas, the purification mode has obvious treatment effect on smoke dust particles or aerosol with larger volume, but has limited treatment effect on micron and submicron level radioactive aerosol, and the radioactive aerosol can affect the health of workers when being dissipated to a working place.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a smoke purifying device for a smelting decontamination plant, which can treat radioactive aerosol generated by the smelting plant through a supergravity purification part, a spraying pressing part and a strengthened spraying part, can collect and reprocess the radioactive aerosol, avoids secondary pollution and is beneficial to the health of workers.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a smoke purifying device for a smelting decontamination plant comprises:
hypergravity purification portion includes:
the device comprises a shell, a first rotating shaft and a second rotating shaft, wherein a packed bed and the rotating shaft are arranged in the shell, the packed bed is of a cylindrical structure, and the rotating shaft is fixedly connected below the packed bed;
the bottom of the spray pipe penetrates through the shell and is fixedly arranged at the center of the cylinder of the packed bed, the top end of the spray pipe is provided with a liquid inlet, and the lower part of the spray pipe is provided with a plurality of liquid drop outlets;
the smoke inlet is arranged in the middle of the shell;
the inlet end of the ventilation pipeline is arranged at the top of the packed bed;
the spraying and pressing part comprises:
the inlet of the first flow guide channel is connected with the outlet of the ventilation pipeline; the smoke inlet end of the shell of the spraying pressing part is connected with the outlet of the first flow guide channel;
the first spraying device is arranged at the upper part of the shell of the spraying pressing part;
the first waste liquid collecting tank is arranged at the lower part of the shell of the spraying and pressing part;
the pressing agent preparation tank is connected with the first spraying device through a first conveying pump;
the inlet of the first flue gas outlet pipeline is connected with the flue gas outlet end of the shell of the spraying pressing part;
reinforce the shower portion, include:
the inlet of the second flow guide channel is connected with the outlet of the first smoke outlet pipeline; the smoke inlet end of the shell of the strengthened spraying part is connected with the outlet of the second flow guide channel;
the second spraying device is arranged at the upper part of the shell of the strengthened spraying part;
the second waste liquid collecting tank is arranged at the lower part of the shell of the strengthened spraying part;
the alkali liquor tank is connected with the second spraying device through a second conveying pump;
and the second flue gas outlet pipeline is connected with the flue gas outlet end of the shell of the strengthened spraying part.
Further, hypergravity purification portion still includes first waste liquid collection tank, first waste liquid collection tank with the bottom of casing is connected.
Further, the rotating shaft and the spraying pipe are arranged in the vertical direction, and the flue gas inlet is arranged in the middle of the shell in the horizontal direction.
Further, the spraying and pressing part further comprises a second waste liquid collecting tank, and the bottom of the first waste liquid collecting tank is communicated with the second waste liquid collecting tank through a pipeline.
Further, the pressing agent preparation tank is provided with a pressing agent feeding port and a water replenishing port.
Further, the cross-sectional area of the first diversion channel gradually increases along the flue gas conveying direction.
Further, the strengthened spraying part also comprises an alkali liquor preparation tank and a third delivery pump;
the alkali liquor preparation tank is provided with an alkali liquor feeding hole and a water replenishing hole;
the alkali liquor preparation tank is connected with the alkali liquor tank through a third delivery pump.
Further, the bottom of the second waste liquid collecting tank is communicated with the lye tank through a pipeline.
Further, the cross-sectional area of the second diversion channel gradually increases along the flue gas conveying direction.
The invention has the following beneficial effects: by adopting the flue gas purifying device for the smelting decontamination plant provided by the invention, the flue gas can be introduced from the flue gas inlet through arranging the supergravity purifying part, the spraying pressing part and the strengthened spraying part, and large-particle pollutants in the flue gas are removed through fully contacting and transferring mass with small water drops sprayed out from a liquid drop outlet of the supergravity purifying part; the flue gas after supergravity purification enters a first flow guide channel of the spraying and pressing part through a wind channel, and can effectively capture submicron radioactive aerosol contained in the flue gas through the mass transfer process of a large amount of aerosol pressing agent sprayed by a first spraying device, so that the collection and the treatment are convenient; and then, the flue gas after spraying, pressing and purifying enters a second flow guide channel of the strengthened spraying part under the action of the pressure of the flue gas, and residual sulfides in the flue gas are removed through a mass transfer process with a large amount of high-concentration alkali liquor sprayed by a second spraying device. The flue gas purifying device for the smelting decontamination factory building, provided by the invention, can remove micron and submicron radioactive aerosol in flue gas based on the supergravity centrifugal force and the good wettability and cohesiveness of the aerosol pressing agent, is particularly suitable for purifying flue gas of a nuclear facility retired smelting decontamination factory building, and has the advantages of high capture efficiency of the radioactive aerosol, capability of collecting and reprocessing the radioactive aerosol, avoidance of secondary pollution and the like.
Drawings
FIG. 1 is a schematic structural diagram of a flue gas purification device of the smelting decontamination factory building, which is provided by the embodiment of the invention;
wherein: 1-hypergravity purification section; 11-a packed bed; 12-a first waste liquor collection tank; 13-a rotating shaft; 14-a droplet outlet; 15-liquid inlet; 16-flue gas inlet; 17-ventilation duct; 2-spraying and pressing part; 21-a first flow guide channel; 22-a first spray device; 23 — a first waste collection tank; 24 — a first delivery pump; 25-pressing agent preparation tank; 26-a second waste liquid collection tank; 3-strengthening the spraying part; 31-a second flow guide channel; 32-lye tank; 33-a third delivery pump; 34-an alkali liquor preparation tank; 35-a second delivery pump; 36 — a second waste collection tank; 37-a second flue gas outlet duct; 38-second spraying device.
Detailed Description
The technical solutions in the embodiments of the present invention are further clearly and completely described below with reference to the accompanying drawings and examples, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments, and all other embodiments that can be obtained by a person skilled in the art without making creative efforts based on the examples in the present invention belong to the protection scope of the present invention.
It should be noted that, in the description of the embodiments of the present invention, the terms "upper", "lower", "front", "rear", "front", "back", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Aiming at radioactive aerosol generated by a nuclear facility retired smelting plant, the smoke purifying device of the smelting decontamination plant designed by the embodiment of the invention utilizes the supergravity principle to fully combine separated water drops with pollutants in smoke under the action of high-speed centrifugal force, so that the pollutants in the smoke are separated from the smoke; in addition, the embodiment also adopts the aerosol pressing agent with good wettability and cohesiveness to capture the radioactive aerosol in the smoke, thereby removing the radioactive aerosol in the submicron level in the smoke.
As shown in fig. 1, the flue gas purifying device for a smelting decontamination factory provided by the embodiment of the present invention mainly comprises: a supergravity purifying part 1, a spraying and pressing part 2 and a strengthening spraying part 3, wherein,
the hypergravity purification portion 1 is a sealing structure and comprises a shell, a packed bed 11, a first waste liquid collecting tank 12, a rotating shaft 13, a spraying pipe, a liquid drop outlet 14, a liquid inlet 15, a smoke inlet 16 and a ventilating pipeline 17, wherein the packed bed 11 and the rotating shaft 13 are arranged in the shell, and the first waste liquid collecting tank 12 is connected with the bottom of the shell. The packed bed 11 is of a cylindrical structure (i.e., a hollow cylindrical structure at the center), the rotating shaft 13 is located below the packed bed 11 and is fixedly connected with the packed bed 11, and the central axis of the rotating shaft 13 coincides with the central axis of the packed bed 11. The bottom of the spray pipe penetrates through the shell and is fixedly arranged at the center of a cylinder of the packed bed 11, the top end of the spray pipe is provided with a liquid inlet 15, and the lower part of the spray pipe is provided with a plurality of liquid drop outlets 14. The rotating shaft 13 and the spraying pipe are both arranged along the vertical direction, and the flue gas inlet 16 is arranged in the middle of the shell along the horizontal direction. The inlet end of the ventilation duct 17 is arranged at the top of the packed bed.
In a particular embodiment, water enters the inner cavity of the shower from a liquid inlet 15 and is sprayed under delivery pressure via a liquid droplet outlet 14 onto the packed bed 11; the packed bed 11 is driven by the rotating shaft 13 to rotate at a high speed, so that the circumferential speed of water entering the packed bed 11 is increased, in the process, the water is dispersed and crushed by the packed bed 11 to form small water drops with active surfaces, and the surface area of the small water drops is increased continuously by the tortuous flow channel. Flue gas enters the shell through the flue gas inlet 16 and enters the packed bed 11 tangentially under the pressure of the flue gas. In the hypergravity purification part 1, the small water drops are fully combined with large particle pollutants in the flue gas, so that the large particle pollutants in the flue gas are separated from the flue gas and are taken away by the small water drops, and an excellent hypergravity purification mass transfer process is formed in the packed bed 11. The water drops after the super-gravity purification are thrown out of the packed bed 11 under the action of centrifugal force and then are collected in a first waste liquid collecting tank 12; the flue gas after the supergravity purification leaves from the center of the rotating shaft 13, is led out by the ventilating duct 17 and enters the inlet of the first flow guide channel 21 of the spraying and pressing part 2.
The spraying and pressing part 2 comprises a first diversion channel 21, a first spraying device 22, a first waste liquid collecting tank 23, a first conveying pump 24, a pressing agent preparation tank 25, a second waste liquid collecting tank 26 and a first flue gas outlet pipeline; wherein, the inlet of the first flow guide channel 21 is connected with the outlet of the ventilation pipeline 17; the flue gas inlet end of the shell of the spraying pressing part 2 is connected with the outlet of the first flow guide channel 21, and the flue gas outlet end of the shell of the spraying pressing part 2 is connected with the inlet of the first flue gas outlet pipeline. A first spraying device 22 is arranged at the upper part of the shell of the spraying and pressing part 2, and a plurality of large-flow nozzles are arranged on the first spraying device 22; a first waste liquid collecting tank 23 is arranged at the lower part of the shell of the spraying and pressing part 2, and the first waste liquid collecting tank 23 is positioned under the first spraying device 22; the bottom of the first waste liquid collecting tank 23 is communicated with a second waste liquid collecting tank 26 through a pipeline. The pressing agent preparation tank 25 is connected to the first spraying device 22 via a first delivery pump 24.
Specifically, the pressing agent preparation tank 25 is used for preparing an aerosol pressing agent, and the aerosol pressing agent in the pressing agent preparation tank 25 is conveyed to the first spraying device 22 through the first conveying pump 24. The pressing agent preparation tank 25 is provided with a pressing agent feed port and a water replenishing port, and can dilute aerosol pressing agent to target viscosity with water.
In a specific embodiment, an aerosol pressing agent with good wettability and cohesiveness is adopted to capture radioactive aerosol in the flue gas after supergravity purification in the spraying and pressing part 2, so as to remove the radioactive aerosol in the flue gas at submicron level. The aerosol pressing agent sprayed by the first spraying device 22 captures the radioactive aerosol in the flue gas at the submicron level to form a first waste liquid, and the first waste liquid is collected to the bottom of the first waste liquid collecting tank 23 through the open end of the first waste liquid collecting tank 23 and then collected into the second waste liquid collecting tank 26 through a pipeline. The flue gas after being sprayed, pressed and purified enters the second diversion channel 31 of the strengthened spraying part 3 through the first flue gas outlet pipeline under the action of the flue gas pressure.
In this embodiment, the cross-sectional area of the first diversion channel 21 gradually increases along the flue gas conveying direction.
The strengthening spraying part 3 comprises a second diversion channel 31, a second spraying device 38, an alkali liquor tank 32, an alkali liquor preparation tank 34, a third delivery pump 33, a second delivery pump 35, a second waste liquor collecting tank 36 and a second flue gas outlet pipeline 37; wherein, the inlet of the second flow guide channel 31 is connected with the outlet of the first flue gas outlet pipeline; the flue gas inlet end of the shell of the strengthening spraying part 3 is connected with the outlet of the second flow guide channel 31, and the flue gas outlet end of the shell of the strengthening spraying part 3 is connected with the second flue gas outlet pipeline 37. A second spraying device 38 is arranged at the upper part of the shell of the strengthening spraying part 3, and a plurality of large-flow nozzles are arranged on the second spraying device 38; a second waste liquid collecting tank 36 is arranged at the lower part of the shell of the strengthened spraying part 3, and the second waste liquid collecting tank 36 is positioned under the second spraying device 38; the bottom of the second effluent collecting tank 36 is communicated with the lye tank 32 through a pipeline. The alkali liquor preparation tank 34 is connected with the alkali liquor tank 32 through a third delivery pump 33, and the alkali liquor tank 32 is connected with a second spraying device 38 through a second delivery pump 35.
Specifically, the alkali liquor preparation tank 34 is used for preparing aerosol spraying alkali liquor, and the aerosol spraying alkali liquor prepared in the alkali liquor preparation tank 34 is conveyed to the alkali liquor tank 32 through a third conveying pump 33; the aerosol spraying lye in the lye tank 32 is conveyed to a second spraying device 38 by a second conveying pump 35. The alkali liquor preparation tank 34 is provided with an alkali liquor feeding hole and a water replenishing hole, and can dilute the alkali liquor to a target concentration by using water.
In a specific embodiment, the radioactive aerosol in the flue gas after being sprayed and pressed for purification is further purified by adopting a high-concentration alkali liquor in the strengthening spraying part 3, so that the residual sulfide in the flue gas is removed. The flue gas after the enhanced spraying and purification is discharged from the second flue gas outlet pipeline 37 under the action of the flue gas pressure. The aerosol spraying alkali liquor sprayed by the second spraying device 38 captures sulfides in the flue gas to form second waste liquor, and the second waste liquor is collected to the bottom of the second waste liquor collecting tank 36 through the open end of the second waste liquor collecting tank 36 and then collected into the alkali liquor tank 32 through a pipeline to be used as the aerosol spraying alkali liquor for recycling.
In this embodiment, a second flow guide channel 31 is disposed at a flue gas inlet of the enhanced spraying part 3, and a cross-sectional area of the second flow guide channel 31 gradually increases along a flue gas conveying direction.
When the flue gas purifying device for the smelting decontamination factory building provided by the embodiment of the invention is used, flue gas enters from the flue gas inlet 16, and is fully contacted and subjected to mass transfer through small water drops sprayed from the liquid drop outlet 14 of the supergravity purification part 1, so that large-particle pollutants in the flue gas are removed; the flue gas purified by the supergravity enters a first flow guide channel 21 of the spraying and pressing part 2 through an air duct 17, and can effectively capture submicron radioactive aerosol contained in the flue gas through the mass transfer process of a large amount of aerosol pressing agents sprayed by a first spraying device 22, so that the collection and the treatment are convenient; then, the flue gas after being sprayed, pressed and purified enters the second flow guide channel 31 of the enhanced spraying part 3 under the action of the pressure of the flue gas, and the residual sulfide in the flue gas is removed through the mass transfer process with a large amount of high-concentration alkali liquor sprayed out by the second spraying device 38.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.
Claims (9)
1. The utility model provides a smelt decontamination factory building and purify flue gas device which characterized in that includes:
hypergravity purification portion includes:
the device comprises a shell, a rotating shaft and a packing bed, wherein the shell is internally provided with the packing bed and the rotating shaft, the packing bed is of a cylindrical structure, and the rotating shaft is fixedly connected below the packing bed;
the bottom of the spray pipe penetrates through the shell and is fixedly arranged at the center of the cylinder of the packed bed, the top end of the spray pipe is provided with a liquid inlet, and the lower part of the spray pipe is provided with a plurality of liquid drop outlets;
the smoke inlet is arranged in the middle of the shell;
the inlet end of the ventilation pipeline is arranged at the top of the packed bed;
spray the suppression portion, include:
the inlet of the first flow guide channel is connected with the outlet of the ventilation pipeline; the smoke inlet end of the shell of the spraying pressing part is connected with the outlet of the first flow guide channel;
the first spraying device is arranged at the upper part of the shell of the spraying and pressing part;
the first waste liquid collecting tank is arranged at the lower part of the shell of the spraying and pressing part;
the pressing agent preparation tank is connected with the first spraying device through a first conveying pump;
the inlet of the first flue gas outlet pipeline is connected with the flue gas outlet end of the shell of the spraying and pressing part;
reinforce the shower portion, include:
the inlet of the second flow guide channel is connected with the outlet of the first smoke outlet pipeline; the smoke inlet end of the shell of the strengthening spraying part is connected with the outlet of the second flow guide channel;
the second spraying device is arranged at the upper part of the shell of the strengthened spraying part;
the second waste liquid collecting tank is arranged at the lower part of the shell of the strengthened spraying part;
the alkali liquor tank is connected with the second spraying device through a second conveying pump;
and the second flue gas outlet pipeline is connected with the flue gas outlet end of the shell of the strengthened spraying part.
2. The fume purifying device for the smelting decontamination factory building according to claim 1, wherein the supergravity purification part further comprises a first waste liquid collecting tank, and the first waste liquid collecting tank is connected with the bottom of the housing.
3. The fume purifying device for the smelting decontamination factory building as claimed in claim 1, wherein the rotating shaft and the spraying pipe are both arranged along a vertical direction, and the fume inlet is arranged along a horizontal direction in the middle of the housing.
4. The smoke purifying device for the smelting decontamination factory building according to claim 1, wherein the spraying and pressing part further comprises a second waste liquid collecting tank, and the bottom of the first waste liquid collecting tank is communicated with the second waste liquid collecting tank through a pipeline.
5. The fume purifying device for the smelting decontamination factory building according to claim 1, wherein the pressing agent preparation tank is provided with a pressing agent feeding hole and a water replenishing hole.
6. The fume purifying device for the smelting decontamination factory building according to claim 1, wherein the cross-sectional area of the first diversion channel is gradually increased along the fume conveying direction.
7. The fume purification device for the smelting decontamination factory building according to claim 1, wherein the intensified spraying part further comprises an alkali liquor preparation tank and a third delivery pump;
the alkali liquor preparation tank is provided with an alkali liquor feeding hole and a water replenishing hole;
the alkali liquor preparation tank is connected with the alkali liquor tank through a third delivery pump.
8. The fume purifying device for the smelting decontamination factory building as claimed in claim 1, wherein the bottom of the second waste liquid collecting tank is communicated with the lye tank through a pipeline.
9. The fume purification device for the smelting decontamination factory building as claimed in claim 1, wherein the cross-sectional area of the second diversion channel is gradually increased along the fume conveying direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211555865.5A CN115715923A (en) | 2022-12-06 | 2022-12-06 | Smoke purifying device for smelting decontamination plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211555865.5A CN115715923A (en) | 2022-12-06 | 2022-12-06 | Smoke purifying device for smelting decontamination plant |
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| Publication Number | Publication Date |
|---|---|
| CN115715923A true CN115715923A (en) | 2023-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211555865.5A Pending CN115715923A (en) | 2022-12-06 | 2022-12-06 | Smoke purifying device for smelting decontamination plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117797585A (en) * | 2024-01-17 | 2024-04-02 | 西安富瑞达科技发展有限公司 | Gas cleaning device and carbon fiber production waste gas treatment system |
-
2022
- 2022-12-06 CN CN202211555865.5A patent/CN115715923A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117797585A (en) * | 2024-01-17 | 2024-04-02 | 西安富瑞达科技发展有限公司 | Gas cleaning device and carbon fiber production waste gas treatment system |
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