CN102836618B - Treating device for tail gas - Google Patents
Treating device for tail gas Download PDFInfo
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- CN102836618B CN102836618B CN201210290498.0A CN201210290498A CN102836618B CN 102836618 B CN102836618 B CN 102836618B CN 201210290498 A CN201210290498 A CN 201210290498A CN 102836618 B CN102836618 B CN 102836618B
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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 tail gas disposal technique field, particularly relate to a kind of exhaust gas processing device.
Background technology
Sol-gal process prepares ceramic microsphere process application in preparing HTGR spheric fuel element uranium dioxide core, and this uranium dioxide fuel core core requires that density is high, intensity large and ball-type degree is good.
Sol-gal process is prepared uranium dioxide core and is mainly contained following steps:
1, dissolve, by triuranium octoxide (U
3o
8) powder is dissolved in nitric acid, is configured to the uranyl nitrate solution of certain uranium atom concentration;
2, boil glue, by necessarily measuring than adding urea in uranyl nitrate solution, evaporation and concentration certain hour is to certain volume at a certain temperature, adds thickener adjustment viscosity, namely obtain colloidal sol glue after cooling;
3, granulation is disperseed, the glue got ready is moved in pressurized tank, glue is promoted along Flows with certain pressure, glue is finally admitted to the vibrating nozzle with certain frequency vibration, after flowing out from vibrating nozzle, dispersion becomes the drop having certain size, this step needs to control flow accurately, because the difference of flow directly causes the deviation of drop size;
4, gelling balling-up, first through air zone after drop is formed, the surface tension of self is relied on to be formed spherical, spherical droplets is again by ammonia district, drop and ammonia generation gelling reaction make surperficial precuring and have certain intensity, enter ammoniacal liquor district afterwards and carry out further gelling reaction and become gel ball;
5, ageing, when gel ball is just formed, gelling reaction only completes at gel ball near surface, gel ball internal-response needs regular hour and temperature, therefore need gel ball to be placed in ammoniacal liquor and add thermal aging 1 ~ 3 hour, gel ball is reacted completely, becomes the spheric granules having some strength uniformly;
6, wash, uranyl nitrtate and ammoniacal liquor react and generate ammonium diuranate and ammonium nitrate, and ammonium diuranate is required composition, and ammonium nitrate is harmful components, easily in subsequent technique, cause little ball fractured, therefore ammonium nitrate must be removed, and method is washing repeatedly.Washing needs 3 ~ 5 times, first pass uses the weak aqua ammonia of 1% ~ 2%, and several all over using deionized water subsequently, each washing lotion needs to test its concentration of nitric acid, guarantees that nitrate radical content is enough low;
7, dry, the bead after washing is dry by vacuum rotating seasoning, needs control temperature, vacuum and rotary speed, to ensure that dry run fully completes and can not cause the destruction of bead;
8, roasting, dried bead needs at roasting kiln roasting, and to slough the organic components in bead, the main component of bead becomes orange oxide simultaneously;
9, reduce, roasting ball, in reduction furnace, is reduced to uranium dioxide in a hydrogen atmosphere, needs to ensure the reducing agent of suitable reduction temperature and abundance and sufficient recovery time;
10, sinter, the bead after reduction in a hydrogen atmosphere, sinters 3 ~ 5 hours, becomes uranium dioxide core under 1400 ~ 1600 degrees Celsius;
11, screening and sorting, through screening and sorting step, can obtain size uniformity, the uranium dioxide core that sphericity meets the demands.
In the step of above-mentioned preparation uranium dioxide core, step 3 disperses use ammonia in granulation process, and excess of ammonia gas needs to absorb and process; In addition, step 7 needs to provide vacuum, and produces the steam being mixed with ammonia, also needs to absorb and process.
Due in the production technology of uranium dioxide core, tail gas is all containing radioactive substance, therefore extremely important to the absorption of tail gas.In addition, should consider its recycling as far as possible containing during Radwastes treatment, this is very meaningful to reducing the discharge of radwaste.
Summary of the invention
(1) technical problem that will solve
The invention provides a kind of tail gas absorption treating apparatus, in order to the tail gas produced in the production technology of efficient absorption and recycling uranium dioxide core.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of exhaust gas processing device, it is characterized in that, comprise tubular uptake zone, be arranged on the tubular holding vessel be communicated with below described tubular uptake zone and with described tubular uptake zone and the fluid loop pipeline that one end is communicated with described tubular uptake zone, the other end is communicated with described tubular holding vessel;
Described tubular holding vessel is provided with inlet and liquid outlet, and liquid valve is set at described liquid outlet place;
Described tubular uptake zone is provided with offgas outlet and gas inlet, and described offgas outlet is positioned at the top of described tubular uptake zone, and described gas inlet is positioned at described fluid loop pipeline is communicated with one end below with described tubular uptake zone;
Described fluid loop pipeline is provided with for the condensing unit of condensed steam and the water pump for pumping liquid-circulating.
Exhaust gas processing device as above, preferably, inside, described tubular uptake zone is provided with liquid dispersion district, is communicated with between one end, for dispersing liquid at described gas inlet with described fluid loop pipeline with described tubular uptake zone.
Exhaust gas processing device as above, preferably, described liquid dispersion district is made up of the multiple porous barriers mated with described tubular uptake zone inner wall shape, is laterally fixed on the inwall of described tubular uptake zone successively from top to bottom.
Exhaust gas processing device as above, preferably, is filled with Raschig ring between described porous barrier and described tubular uptake zone inwall.
Exhaust gas processing device as above, preferably, one end that described fluid loop pipeline is communicated with described tubular uptake zone is provided with fluid jetting head, is positioned at described tubular uptake zone inner, for downward evenly spraying liquid.
Exhaust gas processing device as above, preferably, it is inner that described gas inlet is positioned at described tubular uptake zone, and enter mouth down.
Exhaust gas processing device as above, preferably, the bottom of described tubular uptake zone is communicated with described tubular holding vessel.
Exhaust gas processing device as above, preferably, described fluid loop pipeline is communicated with described liquid outlet.
Exhaust gas processing device as above, preferably, described condensing unit is the pipe box that ring is located at around described fluid loop pipeline outer wall, the upper and lower edge of described pipe box is connected with described fluid loop pipeline closed respectively, and condensing water inlet is set below the sidewall of described pipe box, top arranges condensation-water drain.
Exhaust gas processing device as above, preferably, described gas inlet is connected with air-extractor, for discharging the tail gas after process.
Exhaust gas processing device as above, preferably, described fluid loop pipeline is provided with flowmeter, for monitoring the fluid flow in described fluid loop pipeline.
Exhaust gas processing device as above, preferably, described tubular holding vessel is provided with liquid level gauge, for monitoring the liquid level in described tubular holding vessel.
Exhaust gas processing device as above, preferably, described tubular holding vessel is hydrostatic column.
Exhaust gas processing device as above, preferably, described tubular uptake zone is hydrostatic column.
(3) beneficial effect
Exhaust gas processing device provided by the present invention constantly absorbs the ammonia in tail gas by water pump circulating fluid, when the concentration of ammoniacal liquor reach technique need time, can re-use again, achieve efficient absorption and the recycling of being prepared by sol-gal process to ammonia in uranium dioxide core process tail gas.
Accompanying drawing explanation
Fig. 1 is the structural representation of exhaust gas processing device in the embodiment of the present invention;
Fig. 2 is the structural representation of embodiment of the present invention median septum;
Wherein, 1: tubular holding vessel; 2: tubular uptake zone; 3: liquid dispersion district; 4: offgas 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: fluid loop pipeline.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Prepare uranium dioxide core technique produce ammonia in tail gas to illustrate operation principle and the process of exhaust gas processing device by absorb sol-gal process in the embodiment of the present invention.
Figure 1 shows that the structural representation of exhaust gas processing device in the embodiment of the present invention.As shown in Figure 1, in the embodiment of the present invention, exhaust gas processing device comprises tubular uptake zone 2, tubular holding vessel 1 and fluid loop pipeline 16.Tubular holding vessel 1 is arranged on below tubular uptake zone 2, 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 is then communicated with tubular holding vessel 1; Tubular holding vessel 1 is arranged inlet 13 and liquid outlet 11, and liquid valve 14 is set at liquid outlet 11 place; Tubular uptake zone 2 is provided with offgas outlet 4 and gas inlet 5, offgas 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 one end below with tubular uptake zone 2; Fluid loop pipeline 16 is also provided with for the condensing unit 7 of condensed steam and the water pump 15 for pumping liquid-circulating.
The bottom of tubular uptake zone 2 can be communicated with tubular holding vessel 1 in the present embodiment, avoid adding pipeline for being communicated with tubular uptake zone 2 and tubular holding vessel 1, saving material, simultaneously the structure of all right simplified apparatus.
In order to absorb the ammonia in tail gas, the liquid added from inlet 13 in the present embodiment can be deionized water or weak aqua ammonia.
Wherein, one end that in the present embodiment, preferred liquid return 16 is communicated with tubular uptake zone 2 is provided with fluid jetting head 16, is positioned at tubular uptake zone 2 inner, for downward evenly spraying liquid, increase the contact area of liquid and tail gas, effectively absorb the ammonia in tail gas.
In order to improve the contact area of liquid and tail gas further, preferably arrange liquid dispersion district 3 in the inside of tubular uptake zone 2, wherein, liquid dispersion district 3 is communicated with between one end with fluid loop pipeline 16 with tubular uptake zone 2, for dispersing liquid at gas inlet 5.
As shown in Figure 2, in the present embodiment, liquid dispersion district 3 can be made up of the multiple porous barriers 17 mated with tubular uptake zone 2 inner wall shape, is laterally fixed on the inwall of tubular uptake zone 2 successively from top to bottom.And Raschig ring is filled between porous barrier 17 and the inwall of tubular uptake zone 2, for absorbing ammonia, prevent not water-soluble ammonia from revealing.
In order to improve the absorption to ammonia, gas inlet 5 can be arranged on the inside of tubular uptake zone 2, and enter mouth down, extend the time of staying of tail gas in tubular uptake zone 2, ammonia is fully dissolved in liquid, so that circulation is recycled further.
Preferred liquid return 16 is communicated with liquid outlet 11, is conducive to the pumping cycle of liquid.
Prepare at sol-gal process in the drying process of uranium dioxide core and can produce steam, condensing unit 7 for condensed steam has a variety of mode, condensing unit in the present embodiment can be located at pipe box around fluid loop pipeline 16 outer wall for ring, and the upper and lower edge of pipe box 16 is connected with fluid loop pipeline 16 is airtight respectively, and condensing water inlet 8 is set below the sidewall of pipe box 16, top arranges condensation-water drain 9.In actual application, can need switch condensed water according to technique, such as, when dispersion steps is carried out, tail gas is mainly the ammonia of normal temperature, does not need to carry out condensation; When drying steps carries out, the steam of tail gas mainly containing ammonia, needs to carry out condensation, now should open condensed water.
In order to save material, in the present embodiment, tubular holding vessel 1 tubular uptake zone 2 can be hydrostatic column.
In the present embodiment, sol-gal process is prepared the multiple tail gas that the tail gas that produces in uranium dioxide core technique can realize different process by pipeline and valve control and is entered tubular uptake zone 2 respectively or simultaneously, carries out the absorption process of tail gas.
Need, according to the flow of the flow of tail gas correspondingly rearrange liquids, flowmeter 10 to be arranged on fluid loop pipeline 16, for the fluid flow in monitoring liquid return 16, and be carried out the flow of regulates liquid by water pump 15 in preparation technology.
In use for some time, need the monitoring liquid in tubular holding vessel 1 being carried out to water level and ammonia content, when ammonia content reach technique need time, open liquid valve 14, draw off ammoniacal liquor from liquid outlet 11; When water level is too high, also needs to draw off partial ammonia water and keep in, in order to measure the height of water level, liquid level gauge 12 can being provided with on tubular holding vessel 1, for monitoring the liquid level in tubular holding vessel 1.
The conveniently discharge of tail gas, gas inlet 4 can be connected with the air-extractor (not shown) of periphery, provides draft, for discharging the tail gas after process.
As can be seen from the above embodiments, the present invention constantly absorbs the ammonia in tail gas by water pump circulating fluid, when the concentration of ammoniacal liquor reach technique need time, can re-use again, achieve efficient absorption and the recycling of being prepared by sol-gal process to the ammonia in uranium dioxide core process tail gas.
Technical staff described in this area is easy to expect, the exhaust gas processing device in the embodiment of the present invention is also applicable to effective absorption to water-soluble gas some other in tail gas and recycling, is not limited to the ammonia in the present embodiment.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and replacement, these improve and replace and also should be considered as protection scope of the present invention.
Claims (6)
1. an exhaust gas processing device, it is characterized in that, comprise tubular uptake zone, be arranged on the tubular holding vessel be communicated with below described tubular uptake zone and with described tubular uptake zone and the fluid loop pipeline that one end is communicated with described tubular uptake zone, the other end is communicated with described tubular holding vessel;
Described tubular holding vessel is provided with inlet and liquid outlet, and liquid valve is set at described liquid outlet place;
Described tubular uptake zone is provided with offgas outlet and gas inlet, and described offgas outlet is positioned at the top of described tubular uptake zone, and described gas inlet is positioned at described fluid loop pipeline is communicated with one end below with described tubular uptake zone;
Inside, described tubular uptake zone is provided with liquid dispersion district, is communicated with between one end at described gas inlet with described fluid loop pipeline with described tubular uptake zone, and for dispersing liquid, it is inner that described gas inlet is positioned at described tubular uptake zone, and enter mouth down;
One end that described fluid loop pipeline is communicated with described tubular uptake zone is provided with fluid jetting head, is positioned at described tubular uptake zone inner, for downward evenly spraying liquid;
Described fluid loop pipeline is provided with for the condensing unit of condensed steam and the water pump for pumping liquid-circulating;
Described condensing unit is the pipe box that ring is located at around described fluid loop pipeline outer wall, and the upper and lower edge of described pipe box is connected with described fluid loop pipeline closed respectively, and arranges condensing water inlet below the sidewall of described pipe box, and top arranges condensation-water drain;
Described liquid dispersion district is made up of the multiple porous barriers mated with described tubular uptake zone inner wall shape, is laterally fixed on the inwall of described tubular uptake zone successively from top to bottom, is filled with Raschig ring between described porous barrier and described tubular uptake zone inwall;
The bottom of described tubular uptake zone is communicated with described tubular holding vessel;
Described fluid loop pipeline is communicated with described liquid outlet.
2. exhaust gas processing device according to claim 1, is characterized in that, described gas inlet is connected with air-extractor, for discharging the tail gas after process.
3. exhaust gas processing device according to claim 1, is characterized in that, described fluid loop pipeline is provided with flowmeter, for monitoring the fluid flow in described fluid loop pipeline.
4. exhaust gas processing device according to claim 1, is characterized in that, described tubular holding vessel is provided with liquid level gauge, for monitoring the liquid level in described tubular holding vessel.
5. exhaust gas processing device according to claim 1, is characterized in that, described tubular holding vessel is hydrostatic column.
6. exhaust gas processing device according to claim 1, is characterized in that, described tubular uptake zone is hydrostatic column.
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 CN102836618A (en) | 2012-12-26 |
| CN102836618B true 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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Families Citing this family (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 | Priority date | Publication date | Assignee | Title |
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| 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 |
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| CN102836618A (en) | 2012-12-26 |
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