CN102836618A - Treating device for tail gas - Google Patents
Treating device for tail gas Download PDFInfo
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- CN102836618A CN102836618A CN2012102904980A CN201210290498A CN102836618A CN 102836618 A CN102836618 A CN 102836618A CN 2012102904980 A CN2012102904980 A CN 2012102904980A CN 201210290498 A CN201210290498 A CN 201210290498A CN 102836618 A CN102836618 A CN 102836618A
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Abstract
The invention belongs to the technical field of tail gas treatment and discloses a treating device for tail gas. The treating device for tail gas comprises a cylindrical absorbing area, a cylindrical storage tank and a liquid loop pipeline, wherein the cylindrical storage tank is arranged under the cylindrical absorbing area and is communicated with the cylindrical absorbing area; one end of the liquid loop pipeline is communicated with the cylindrical absorbing area while the other end is communicated with the cylindrical storage tank; a liquid inlet and a liquid outlet are arranged on the cylindrical storage tank; a liquid outlet valve is arranged at the liquid outlet; a tail gas outlet and a tail gas inlet are arranged on the cylindrical absorbing area; the tail gas outlet is located at the top of the cylindrical absorbing area; and the tail gas inlet is located under one end of the liquid loop pipeline communicated with the cylindrical absorbing area. The treating device for tail gas provided by the invention is used for continuously absorbing the ammonia in the tail gas through water pump circulating liquid. When the concentration of the ammonia water meets the technical requirement, the ammonia water can be reused, so that the high-efficient absorption and the reutilization of the ammonia in the technical tail gas generated by preparing a uranium dioxide core according to a sol gel method are realized.
Description
Technical field
The present invention relates to the vent gas treatment technical field, particularly relate to a kind of exhaust gas processing device.
Background technology
Prepared by Sol Gel Method ceramic microsphere process application is in preparation HTGR spheric fuel element uranium dioxide nuclear core, and this uranium dioxide fuel nuclear core requires the density height, intensity is big and the ball-type degree is good.
Prepared by Sol Gel Method uranium dioxide nuclear core mainly contains following steps:
1, dissolving is with triuranium octoxide (U
3O
8) powder is dissolved in the nitric acid, is configured to the uranyl nitrate solution of certain uranium atom concentration;
2, boil glue, by necessarily metering is than adding urea, evaporation and concentration certain hour to certain volume adds thickener adjustment viscosity after the cooling at a certain temperature, promptly obtains the colloidal sol glue in uranyl nitrate solution;
3, disperse granulation; The glue of getting ready is moved in the pressurized tank; Flow along pipeline with certain force glue, glue finally is admitted to the vibrating nozzle with certain frequency vibration, flows out the back from vibrating nozzle and disperses to become the drop that certain size is arranged; This step needs accurate control flow, because the difference of flow directly causes the deviation of drop size;
4, gelling balling-up; Elder generation was through air zone after drop formed; Rely on the surface tension of self to form sphere; Spherical droplets is again through the ammonia district, and drop and ammonia generation gelling reaction make surperficial precuring and have certain intensity, gets into the ammoniacal liquor district afterwards and carries out further gelling reaction and become gel ball;
5, ageing; When gel ball has just formed; Gelling reaction is only accomplished at the gel ball near surface, and the gel ball internal-response needs regular hour and temperature, therefore need place ammoniacal liquor to add thermal aging 1～3 hour gel ball; Gel ball is reacted completely, become the spheric granules that certain intensity is arranged uniformly;
6, washing, uranyl nitrtate and ammoniacal liquor reaction generate ammonium diuranate and ammonium nitrate, and ammonium diuranate is required composition, and ammonium nitrate is harmful components, in subsequent technique, causes little ball fractured easily, therefore must ammonium nitrate be removed, method is washing repeatedly.Washing needs 3～5 times, and first pass uses 1%～2% weak aqua ammonia, and several subsequently all over using deionized water, each washing lotion need be tested its concentration of nitric acid, guarantees that nitrate radical content is enough low;
7, drying, the bead after the washing is dry with vacuum Rotary drying method, needs control temperature, vacuum and rotary speed, with the destruction that guarantees that bead is fully accomplished and can not be caused to dry run;
8, roasting, dried bead need be at the roasting kiln roasting, and to slough the organic components in the bead, the main component of bead becomes orange oxide simultaneously;
9, reduction, the roasting ball is reduced to uranium dioxide under hydrogen atmosphere in reduction furnace, need to guarantee suitable reduction temperature and sufficient reducing agent and sufficient recovery time;
10, sintering, the bead after the reduction 1400～1600 degrees centigrade of following sintering 3～5 hours, become uranium dioxide nuclear core under hydrogen atmosphere;
11, screening and sorting through screening and sorting step, can obtain the size homogeneous, the uranium dioxide nuclear core that sphericity meets the demands.
In the step of above-mentioned preparation uranium dioxide nuclear core, step 3 disperses can use ammonia in the granulation process, and excess of ammonia gas need absorb and handle; In addition, step 7 need provide vacuum, and produces the steam that is mixed with ammonia, also need absorb and handle.
Because in the production technology of uranium dioxide nuclear core, tail gas all contains radioactive substance, and is therefore extremely important to the absorption of tail gas.In addition, when handling, radwaste should consider that with its recycling this is very meaningful to the discharging that reduces radwaste to containing as far as possible.
Summary of the invention
The technical problem that (one) will solve
The present invention provides a kind of tail gas absorption treating device, the tail gas that produces in the production technology in order to efficient absorption and recycling uranium dioxide nuclear core.
(2) technical scheme
In order to solve the problems of the technologies described above; The present invention provides a kind of exhaust gas processing device; It is characterized in that, comprise the tubular uptake zone, be arranged on below, said tubular uptake zone and tubular holding vessel that is communicated with said tubular uptake zone and the fluid loop pipeline that an end is communicated with said tubular uptake zone, the other end is communicated with said tubular holding vessel;
Said tubular holding vessel is provided with inlet and liquid outlet, and at said liquid outlet place liquid valve is set;
Said tubular uptake zone is provided with tail gas outlet and gas inlet, and said tail gas outlet is positioned at the top of said tubular uptake zone, and said gas inlet is positioned at said fluid loop pipeline is communicated with an end with said tubular uptake zone below;
Said fluid loop pipeline is provided with condensing unit that is used for condensed steam and the water pump that is used to pump the liquid circulation.
Aforesaid exhaust gas processing device, preferably, said tubular uptake zone set inside has the liquid dispersion district, is communicated with between the end with said tubular uptake zone with said fluid loop pipeline at said gas inlet, is used for dispersing liquid.
Aforesaid exhaust gas processing device, preferably, said liquid dispersion district is by forming with a plurality of porous barriers of said tubular uptake zone inner wall shape coupling, from top to bottom successively crosswise fixed on the inwall of said tubular uptake zone.
Aforesaid exhaust gas processing device preferably, is filled with Raschig ring between said porous barrier and the said tubular uptake zone inwall.
Aforesaid exhaust gas processing device, preferably, said fluid loop pipeline is provided with fluid jetting head with the end that said tubular uptake zone is communicated with, and it is inner to be positioned at said tubular uptake zone, is used for downwards evenly spraying liquid.
Aforesaid exhaust gas processing device, preferably, it is inner that said gas inlet is positioned at said tubular uptake zone, and go into mouth down.
Aforesaid exhaust gas processing device, preferably, the bottom of said tubular uptake zone is communicated with said tubular holding vessel.
Aforesaid exhaust gas processing device, preferably, said fluid loop pipeline is communicated with said liquid outlet.
Aforesaid exhaust gas processing device; Preferably; Said condensing unit is located at said fluid loop pipeline outer wall pipe box on every side for ring; The upper and lower edge of said pipe box respectively with said airtight connection of fluid loop pipeline, and below the sidewall of said pipe box, condensing water inlet is set, the top is provided with condensation-water drain.
Aforesaid exhaust gas processing device, preferably, said gas inlet is connected with air-extractor, is used to discharge the tail gas after the processing.
Aforesaid exhaust gas processing device, preferably, said fluid loop pipeline is provided with flowmeter, is used to monitor the fluid flow in the said fluid loop pipeline.
Aforesaid exhaust gas processing device, preferably, said tubular holding vessel is provided with liquid level gauge, is used to monitor the liquid level in the said tubular holding vessel.
Aforesaid exhaust gas processing device, preferably, said tubular holding vessel is a hydrostatic column.
Aforesaid exhaust gas processing device, preferably, said tubular uptake zone is a hydrostatic column.
(3) beneficial effect
Exhaust gas processing device provided by the present invention comes constantly to absorb the ammonia in the tail gas through the water pump circulating fluid; When the concentration of ammoniacal liquor reaches arts demand; Can utilize again again, realize efficient absorption and recycling ammonia in the Prepared by Sol Gel Method uranium dioxide nuclear core process tail gas.
Description of drawings
Fig. 1 is the structural representation of exhaust gas processing device in the embodiment of the invention;
Fig. 2 is the structural representation of embodiment of the invention median septum;
Wherein, 1: the tubular holding vessel; 2: the tubular uptake zone; 3: the liquid dispersion district; 4: the tail gas outlet; 5: gas inlet; 6: fluid jetting head; 7: condensing unit; 8: condensing water inlet; 9: condensation-water drain; 10: flowmeter; 11: liquid outlet; 12: liquid level gauge; 13: inlet; 14: liquid valve; 15: water pump; 16: the fluid loop pipeline.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes in further detail.Following examples are used to explain the present invention, but are not used for limiting scope of the present invention.
To be operation principle and the process that example specifies exhaust gas processing device with the ammonia that absorbs in the Prepared by Sol Gel Method uranium dioxide nuclear core technology generation tail gas in the embodiment of the invention.
Shown in Figure 1 is the structural representation of exhaust gas processing device in the embodiment of the invention.As shown in Figure 1, exhaust gas processing device comprises tubular uptake zone 2, tubular holding vessel 1 and fluid loop pipeline 16 in the embodiment of the invention.Tubular holding vessel 1 is arranged on 2 belows, tubular uptake zone, and is communicated with tubular uptake zone 2; One end of fluid loop pipeline 16 is communicated with tubular uptake zone 2, and the other end then is communicated with tubular holding vessel 1; Inlet 13 and liquid outlet 11 are set on the tubular holding vessel 1, and liquid valve 14 are set at liquid outlet 11 places; Tubular uptake zone 2 is provided with tail gas outlet 4 and gas inlet 5, and tail gas outlet 4 is positioned at the top of tubular uptake zone 2, and gas inlet 5 is positioned at fluid loop pipeline 16 is communicated with an end with tubular uptake zone 2 below; Also be provided with condensing unit 7 that is used for condensed steam and the water pump 15 that is used to pump the liquid circulation on the fluid loop pipeline 16.
Can the bottom of tubular uptake zone 2 be communicated with tubular holding vessel 1 in the present embodiment, avoid adding pipeline and be used to be communicated with tubular uptake zone 2 and tubular holding vessel 1, save material, the structure of simultaneously all right simplified apparatus.
In order to absorb the ammonia in the tail gas, the liquid that adds from inlet 13 in the present embodiment can be deionized water or weak aqua ammonia.
Wherein, The end that preferred liquid return 16 is communicated with tubular uptake zone 2 in the present embodiment is provided with fluid jetting head 16, is positioned at 2 inside, tubular uptake zone, is used for downwards evenly spraying liquid; Increase the contact area of liquid and tail gas, effectively absorb the ammonia in the tail gas.
In order further to improve the contact area of liquid and tail gas, preferably in the set inside liquid dispersion district 3 of tubular uptake zone 2, wherein, liquid dispersion district 3 is communicated with between the end with tubular uptake zone 2 with fluid loop pipeline 16 at gas inlet 5, is used for dispersing liquid.
As shown in Figure 2, liquid dispersion district 3 can be by forming with a plurality of porous barriers 17 of tubular uptake zone 2 inner wall shape couplings in the present embodiment, from top to bottom successively crosswise fixed on the inwall of tubular uptake zone 2.And between the inwall of porous barrier 17 and tubular uptake zone 2, fill Raschig ring, and be used to absorb ammonia, prevent not water-soluble ammonia leakage.
In order to improve absorption to ammonia, can gas inlet 5 be arranged on the inside of tubular uptake zone 2, and go into mouth down, prolong the time of staying of tail gas in tubular uptake zone 2, make ammonia fully be dissolved in the liquid, so that further circulation is recycled.
Preferred liquid return 16 is communicated with liquid outlet 11, helps the circulation of pumping of liquid.
In the drying process of Prepared by Sol Gel Method uranium dioxide nuclear core, can produce steam; The condensing unit 7 that is used for condensed steam has a variety of modes; Condensing unit in the present embodiment can be located at fluid loop pipeline 16 outer walls pipe box on every side for ring; And the upper and lower edge of pipe box 16 respectively with 16 airtight connections of fluid loop pipeline, and condensing water inlet 8 is set below the sidewall of pipe box 16, the top is provided with condensation-water drain 9.In actual application, can be according to arts demand switch condensed water, for example, when dispersion steps was carried out, tail gas was mainly the ammonia of normal temperature, need not carry out condensation; When drying steps carried out, tail gas mainly was the steam that contains ammonia, need carry out condensation, and should open condensed water this moment.
In order to save material, tubular holding vessel 1 tubular uptake zone 2 can be hydrostatic column in the present embodiment.
The tail gas that produces in the Prepared by Sol Gel Method uranium dioxide nuclear core technology in the present embodiment can realize that the multiple tail gas of different process gets into tubular uptake zone 2 respectively or simultaneously through pipeline and valve control, carries out the absorption of tail gas and handles.
In preparation technology, need correspondingly adjust the flow of liquid according to the flow of tail gas, can flowmeter 10 be set on fluid loop pipeline 16, be used for the fluid flow in the monitoring liquid return 16, and regulate the flow of liquid through water pump 15.
In use for some time, need carry out the monitoring of water level and ammonia content, when ammonia content reaches arts demand, open liquid valve 14, draw off ammoniacal liquor from liquid outlet 11 to the liquid in the tubular holding vessel 1; When water level was too high, it was temporary also need to draw off partial ammonia water, in order to measure the height of water level, can be provided with liquid level gauge 12 by tubular holding vessel 1, was used to monitor the liquid level in the tubular holding vessel 1.
The discharge of tail gas for ease, gas inlet 4 can be connected with the air-extractor (not shown) of periphery, and draft is provided, and is used to discharge the tail gas after the processing.
Can find out by above embodiment; The present invention comes constantly to absorb the ammonia in the tail gas through the water pump circulating fluid; When the concentration of ammoniacal liquor reaches arts demand; Can utilize again again, realize efficient absorption and recycling the ammonia in the Prepared by Sol Gel Method uranium dioxide nuclear core process tail gas.
This area said technical staff be easy to expect, the exhaust gas processing device in the embodiment of the invention also is applicable to the effective absorption and the recycling of some other water-soluble gas in the tail gas, is not limited to the ammonia in the present embodiment.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and replacement, these improvement and replacement also should be regarded as protection scope of the present invention.
Claims (14)
1. exhaust gas processing device; It is characterized in that, comprise the tubular uptake zone, be arranged on below, said tubular uptake zone and tubular holding vessel that is communicated with said tubular uptake zone and the fluid loop pipeline that an end is communicated with said tubular uptake zone, the other end is communicated with said tubular holding vessel;
Said tubular holding vessel is provided with inlet and liquid outlet, and at said liquid outlet place liquid valve is set;
Said tubular uptake zone is provided with tail gas outlet and gas inlet, and said tail gas outlet is positioned at the top of said tubular uptake zone, and said gas inlet is positioned at said fluid loop pipeline is communicated with an end with said tubular uptake zone below;
Said fluid loop pipeline is provided with condensing unit that is used for condensed steam and the water pump that is used to pump the liquid circulation.
2. exhaust gas processing device according to claim 1 is characterized in that, said tubular uptake zone set inside has the liquid dispersion district, is communicated with between the end with said tubular uptake zone with said fluid loop pipeline at said gas inlet, is used for dispersing liquid.
3. exhaust gas processing device according to claim 2 is characterized in that, said liquid dispersion district is by forming with a plurality of porous barriers of said tubular uptake zone inner wall shape coupling, from top to bottom successively crosswise fixed on the inwall of said tubular uptake zone.
4. exhaust gas processing device according to claim 3 is characterized in that, is filled with Raschig ring between said porous barrier and the said tubular uptake zone inwall.
5. exhaust gas processing device according to claim 1 is characterized in that, said fluid loop pipeline is provided with fluid jetting head with the end that said tubular uptake zone is communicated with, and it is inner to be positioned at said tubular uptake zone, is used for downwards evenly spraying liquid.
6. exhaust gas processing device according to claim 1 is characterized in that, it is inner that said gas inlet is positioned at said tubular uptake zone, and go into mouth down.
7. exhaust gas processing device according to claim 1 is characterized in that, the bottom of said tubular uptake zone is communicated with said tubular holding vessel.
8. exhaust gas processing device according to claim 1 is characterized in that, said fluid loop pipeline is communicated with said liquid outlet.
9. exhaust gas processing device according to claim 1; It is characterized in that; Said condensing unit is located at said fluid loop pipeline outer wall pipe box on every side for ring; The upper and lower edge of said pipe box respectively with said airtight connection of fluid loop pipeline, and below the sidewall of said pipe box, condensing water inlet is set, the top is provided with condensation-water drain.
10. according to the arbitrary described exhaust gas processing device of claim 1-9, it is characterized in that said gas inlet is connected with air-extractor, be used to discharge the tail gas after the processing.
11., it is characterized in that said fluid loop pipeline is provided with flowmeter according to the arbitrary described exhaust gas processing device of claim 1-9, be used to monitor the fluid flow in the said fluid loop pipeline.
12., it is characterized in that said tubular holding vessel is provided with liquid level gauge according to the arbitrary described exhaust gas processing device of claim 1-9, be used to monitor the liquid level in the said tubular holding vessel.
13., it is characterized in that said tubular holding vessel is a hydrostatic column according to the arbitrary described exhaust gas processing device of claim 1-9.
14., it is characterized in that said tubular uptake zone is a hydrostatic column according to the arbitrary described exhaust gas processing device of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210290498.0A CN102836618B (en) | 2012-08-15 | 2012-08-15 | Treating device for tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210290498.0A CN102836618B (en) | 2012-08-15 | 2012-08-15 | Treating device for tail gas |
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| Publication Number | Publication Date |
|---|---|
| CN102836618A true CN102836618A (en) | 2012-12-26 |
| CN102836618B CN102836618B (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210290498.0A Active CN102836618B (en) | 2012-08-15 | 2012-08-15 | Treating device for tail gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105413401A (en) * | 2015-12-11 | 2016-03-23 | 天津市天环精细化工研究所 | Laboratory scale tail gas absorption device |
| CN105561772A (en) * | 2015-12-14 | 2016-05-11 | 天津市天环精细化工研究所 | Catalyst pilot test tail gas absorbing tower |
| CN113634092A (en) * | 2021-10-18 | 2021-11-12 | 胜利油田华海石化有限责任公司 | Reveal ammonia absorbing device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201079727Y (en) * | 2007-07-27 | 2008-07-02 | 朱定洋 | Ammonia gas reclaiming device |
| CN201091819Y (en) * | 2007-08-08 | 2008-07-30 | 山东联合化工股份有限公司 | Tail gas absorption tower for melamine united production |
| CN201214026Y (en) * | 2008-04-03 | 2009-04-01 | 淮安嘉诚高新化工股份有限公司 | Tail-gas recovery device |
| CN202036905U (en) * | 2011-02-15 | 2011-11-16 | 江苏南大光电材料股份有限公司 | Leaching tower device for treatment of tail gas generated in production of metal organic (MO) source |
-
2012
- 2012-08-15 CN CN201210290498.0A patent/CN102836618B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201079727Y (en) * | 2007-07-27 | 2008-07-02 | 朱定洋 | Ammonia gas reclaiming device |
| CN201091819Y (en) * | 2007-08-08 | 2008-07-30 | 山东联合化工股份有限公司 | Tail gas absorption tower for melamine united production |
| CN201214026Y (en) * | 2008-04-03 | 2009-04-01 | 淮安嘉诚高新化工股份有限公司 | Tail-gas recovery device |
| CN202036905U (en) * | 2011-02-15 | 2011-11-16 | 江苏南大光电材料股份有限公司 | Leaching tower device for treatment of tail gas generated in production of metal organic (MO) source |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105413401A (en) * | 2015-12-11 | 2016-03-23 | 天津市天环精细化工研究所 | Laboratory scale tail gas absorption device |
| CN105561772A (en) * | 2015-12-14 | 2016-05-11 | 天津市天环精细化工研究所 | Catalyst pilot test tail gas absorbing tower |
| CN113634092A (en) * | 2021-10-18 | 2021-11-12 | 胜利油田华海石化有限责任公司 | Reveal ammonia absorbing device |
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| Publication number | Publication date |
|---|---|
| CN102836618B (en) | 2015-02-18 |
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