CN212492322U - Ultra-clean processing apparatus of titanium dioxide acidolysis tail gas - Google Patents
Ultra-clean processing apparatus of titanium dioxide acidolysis tail gas Download PDFInfo
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- CN212492322U CN212492322U CN202020869863.3U CN202020869863U CN212492322U CN 212492322 U CN212492322 U CN 212492322U CN 202020869863 U CN202020869863 U CN 202020869863U CN 212492322 U CN212492322 U CN 212492322U
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Abstract
The utility model discloses an ultra-clean treatment device for titanium dioxide acidolysis tail gas, which comprises an empty tower, a spray tower and a low-temperature plasma system which are connected in sequence; the system also comprises a water supply system for supplying water for the empty tower, the spray tower and the low-temperature plasma system; the empty tower is also connected with a titanium dioxide acidolysis reactor and is used for spraying the received titanium dioxide acidolysis tail gas for preliminary cooling and removing large granular substances; the spray tower is used for further spraying, cooling and removing part of small particle substances from the titanium dioxide acidolysis tail gas; the low-temperature plasma system is used for decomposing the titanium dioxide acidolysis tail gas to ensure that the tail gas reaches the discharge standard. The utility model discloses utilize empty tower and spray column to combine to carry out preliminary cooling, then handle through low temperature plasma system, can realize the target of the ultra-clean emission of sulfuric acid mist, hydrogen sulfide, nitrogen oxide, particulate matter in the titanium dioxide acidolysis tail gas pollutant.
Description
Technical Field
The utility model belongs to the technical field of the tail gas treatment, concretely relates to ultra-clean processing apparatus of titanium dioxide acidolysis tail gas.
Background
In the production process of titanium dioxide by a sulfuric acid method, the acidolysis reaction is a violent exothermic reaction, the reaction time is short, the reaction temperature is high, the gas discharge amount in unit time is large, and a large amount of acid mist and a small amount of SO are carried in tail gas3、SO2Nitrogen oxides, mineral dust and other impurities, and the treatment of tail gas has high requirements on treatment devices due to explosiveness, acid mist corrosiveness and dust particles. The traditional technical treatment method has the advantages of single treatment component, complex system, poor treatment effect, high operation cost, even the use of additives to generate secondary pollution, and the requirement of environmental protection and emission at present can not be met far. For example, the titanium dioxide acidolysis tail gas treatment method disclosed in patent CN201210235007.2 adopts alkali liquor neutralization and multi-stage venturi treatment, and although a certain effect is obtained, additives are also used, and secondary pollution is generated. Therefore, it is necessary to develop a new titanium dioxide acidolysis tail gas treatment device.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an ultra-clean treatment device for titanium dioxide acidolysis tail gas, which solves the defects of the prior art.
The purpose of the utility model is realized by the following technical scheme:
an ultra-clean treatment device for titanium dioxide acidolysis tail gas comprises an empty tower, a spray tower and a low-temperature plasma system which are sequentially connected;
the water supply system is respectively connected with the empty tower, the spray tower and the low-temperature plasma system and is used for providing water for spraying the empty tower and the spray tower and water for cooling and cleaning the low-temperature plasma system;
the empty tower is also connected with a titanium dioxide acidolysis reactor and is used for spraying the received titanium dioxide acidolysis tail gas for primary cooling and removing large particulate matters, and then discharging the titanium dioxide acidolysis tail gas to the spray tower; the spray tower is used for further spraying, cooling and removing part of small particulate matters from the titanium dioxide acidolysis tail gas, and then discharging the titanium dioxide acidolysis tail gas to the low-temperature plasma system; the low-temperature plasma system is used for decomposing the titanium dioxide acidolysis tail gas.
Preferably, the empty tower and the spray tower are both provided with spray water inlets and outlets, and the low-temperature plasma system is provided with a cooling water inlet and outlet and a cleaning water inlet and outlet; the water supply system comprises a sewage treatment tank and a circulating water tank; the sewage treatment tank is provided with a sewage inlet and a sewage outlet; the circulating water pool is provided with a circulating water inlet and a circulating water outlet;
a cooling water inlet and a cleaning water inlet of the low-temperature plasma system are connected with the primary water tank, a cooling water outlet is connected with a circulating water inlet of the circulating water tank, and a cleaning water outlet is connected with a sewage inlet of the sewage treatment tank;
spray water inlets of the empty tower and the spray tower are connected with a circulating water outlet of the circulating water pool, and a spray water outlet is connected with a sewage inlet of the sewage treatment pool;
and the sewage outlet of the sewage treatment tank is connected with the circulating water inlet of the circulating water tank.
Preferably, the spray tower is further provided with a cleaning water inlet, and the cleaning water inlet of the spray tower is connected with the primary water tank.
Preferably, the plasma processing system further comprises a cooling tower, wherein an inlet of the cooling tower is respectively connected with a cleaning water outlet of the low-temperature plasma system, a spray water outlet of the spray tower and a spray water outlet of the empty tower; and the outlet of the cooling tower is connected with the sewage inlet of the sewage treatment tank.
Preferably, the plasma processing system further comprises a chimney, and the chimney is connected with the low-temperature plasma system.
Preferably, a fan is arranged between the low-temperature plasma system and the chimney.
Preferably, the spray tower has a three-layer spray structure, from top to bottom, the bottom of the first spray layer is a baffling layer, the bottom of the second spray layer is a first filter layer, and the bottom of the third spray layer is a second filter layer.
The utility model provides an ultra-clean processing apparatus of titanium dioxide acidolysis tail gas gives up the venturi tube that traditional tail gas handled or the method that multistage alkali lye sprayed, utilizes empty tower and spray column to combine to carry out the cooling of tentatively cooling, then handles through low temperature plasma system, can realize the target that the ultra-clean of titanium dioxide acidolysis tail gas pollutant discharged sulfuric acid mist, hydrogen sulfide, nitrogen oxide, particulate matter. The utility model discloses a flow is simple, and detachable equipment spare part easy to maintain, and can satisfy national atmospheric pollutants emission standard, satisfy on-line measuring's requirement.
Drawings
FIG. 1 is a schematic structural view of an ultra-clean treatment device for titanium dioxide acidolysis tail gas provided by the utility model;
fig. 2 is a schematic structural diagram of a spray tower.
Wherein, the solid line with the arrow is a tail gas route, the dotted line with the arrow is a primary water route, the dotted line with the arrow is a spray water route, and the double-dotted line with the arrow is a cooling water route of the low-temperature plasma system.
Detailed Description
The ultra-clean treatment device for titanium dioxide acidolysis tail gas provided by the utility model, as shown in figure 1, comprises an empty tower 5, a spray tower 6 and a low-temperature plasma system 7 which are connected in sequence;
the water supply system is respectively connected with the empty tower 5, the spray tower 6 and the low-temperature plasma system 7 and is used for providing water for spraying of the empty tower 5 and the spray tower 6 and water for cooling and cleaning of the low-temperature plasma system 7;
the empty tower 5 is also connected with the titanium dioxide acidolysis reactor 4 and is used for spraying the received titanium dioxide acidolysis tail gas for preliminary cooling and removing large particulate matters, and then discharging the titanium dioxide acidolysis tail gas to the spray tower 6; the spray tower 6 is used for further spraying, cooling and removing part of small particle substances from the titanium dioxide acidolysis tail gas, and then discharging the titanium dioxide acidolysis tail gas to the low-temperature plasma system 7; the low-temperature plasma system 7 is used for decomposing the titanium dioxide acidolysis tail gas to ensure that the tail gas reaches the standard and is discharged.
Titanium dioxide acidolysis tail gas is at first through the preliminary cooling of sky tower 5 after coming out from acidolysis reactor 4, gets rid of large particulate matter to reduce the problem that filler spray column blocked up, system resistance is big, then further cools down to below 45 ℃ through spray column, and gets rid of impurity such as part dust tiny particle, reaches the purpose of preliminary clear away the pollutant. Then the pollutants are decomposed in a very short time under the action of high-voltage discharge of the low-temperature plasma system 7, and are converted into a mixture of electrons, various ions, atoms and free radicals, and the mixture is subjected to subsequent reaction, so that the gas pollutants are eliminated, the solid pollutants are adhered to the ion beams after being treated, and then the pollutants are removed by using fluid, and the purpose of ultra-clean emission of the acidolysis tail gas pollutants is achieved. Because the low-temperature plasma system can separate dust particles, acid and nitrogen oxides by electrolysis, the treatment is more thorough compared with other waste gas treatment equipment such as a bag filter and the like.
Therefore, the utility model discloses give up the method that venturi tube or multistage alkali lye of traditional tail gas treatment sprayed, utilize empty tower and spray column to combine to carry out preliminary cooling, then handle through low temperature plasma system, can realize the target of the ultra-clean emission of sulfuric acid mist, hydrogen sulfide, nitrogen oxide, particulate matter in the titanium dioxide acidolysis tail gas pollutant. The utility model discloses a flow is simple, and detachable equipment spare part easy to maintain, and can satisfy national atmospheric pollutants emission standard, satisfy on-line measuring's requirement.
Preferably, the empty tower 5 and the spray tower 6 are both provided with spray water inlets and outlets, and the low-temperature plasma system 7 is provided with a cooling water inlet and outlet and a cleaning water inlet and outlet; the water supply system comprises a primary water tank 10, a sewage treatment tank 1 and a circulating water tank 2; the sewage treatment tank 1 is provided with a sewage inlet and a sewage outlet; the circulating water tank 2 is provided with a circulating water inlet and a circulating water outlet;
a cooling water inlet and a cleaning water inlet of the low-temperature plasma system 7 are both connected with the primary water tank 10, a cooling water outlet is connected with the primary water tank, and a cleaning water outlet is connected with a sewage inlet of the sewage treatment tank 1;
spray water inlets of the empty tower 5 and the spray tower 6 are connected with a circulating water outlet of the circulating water tank 2, and a spray water outlet is connected with a sewage inlet of the sewage treatment tank 1;
the sewage outlet of the sewage treatment tank 1 is connected with the circulating water inlet of the circulating water tank 2.
In the tail gas treatment process, clean primary water provided by a primary water tank 10 is supplied to a low-temperature plasma system 7 for cooling and internally washing pollutants on ion beams, then sewage which is generated after washing and carries the pollutants is discharged to a sewage treatment tank 1, the sewage is introduced into an empty tower 5 and a spray tower 6 to be used as spray water after treatment, and then the generated spray sewage is conveyed to the sewage treatment tank 1 and is recycled after treatment in the sewage treatment tank. The primary water supplied to the low-temperature plasma system 7 for cooling is only used as cooling circulating water and is not polluted, so that the primary water can be directly discharged to the primary water tank 10 for recycling without being treated by a sewage treatment tank.
Therefore, the water for the low-temperature plasma system 7 adopts primary water for washing and cooling circulation, so that the pollution caused by using secondary circulating water can be reduced, and the running cost can be reduced by recycling the cooling water; and because the empty tower 5 and the spray tower 6 are only used for primary cooling, secondary circulating water is adopted, so that the consumption of primary water can be greatly saved, and the cost is saved.
Preferably, the spray tower 6 is further provided with a cleaning water inlet, which is connected to the primary water tank 10. The spray tower 6 is cleaned by pollution-free primary water, and the cleaned water is discharged to the sewage treatment tank 1 through a spray water outlet for recycling.
Preferably, the utility model provides a processing apparatus still includes cooling tower 11, cooling tower 11's import respectively with spray column 6, empty tower 5's spray water export and low temperature plasma system 7 wash water outlet connection, the export of cooling tower and the sewage access connection of sewage treatment pond 1. After the spray water is sprayed by the spray tower and the empty tower and is cleaned by a low-temperature plasma system, the temperature of acidolysis tail gas is reduced, the temperature of water is obviously increased, and the acidolysis tail gas cannot be directly used for cooling the empty tower and the spray tower, so that the cooling tower is arranged, the acidolysis tail gas can flow into a sewage treatment tank after being cooled, and the acidolysis tail gas can be used for cooling the empty tower and the spray tower after impurities are treated.
Preferably, a circulating water pump 3 is arranged between the circulating water pool 2 and the empty tower 5 and between the circulating water pool and the spray tower 6, so that the circulating water is conveyed conveniently.
Preferably, the treatment device provided by the utility model also comprises a chimney 9 connected with the tail gas outlet of the low-temperature plasma system 7. The tail gas treated by the low-temperature plasma system 7 is intensively discharged to the high altitude through a chimney 9, so that the influence on the ground environment is reduced. Further preferably, a fan 8 is arranged between the low-temperature plasma system 7 and the chimney 9, so that tail gas is conveyed conveniently.
Preferably, the spray tower and the empty tower can adopt the conventional structure in the prior art. As shown in fig. 2, the spray tower 6 preferably has a three-layer spray structure, from top to bottom, a baffle layer 62 is arranged at the bottom of a first spray layer 61, a first filter layer 64 is arranged at the bottom of a second spray layer 63, and a second filter layer 66 is arranged at the bottom of a third spray layer 65. The first filter layer and the second filter layer can adopt materials commonly used in the spray tower in the prior art, and are preferably flame-retardant and attachment-resistant materials. Compared with a spray tower, the hollow tower adopts a one-stage or two-stage spray structure, reduces the system resistance and is used for primarily cooling and reducing the flow rate of smoke.
As will be appreciated by those skilled in the art, the processing device provided by the present invention further comprises conventionally arranged connecting pipes, a thermometer 12, a flow meter 13, a control valve 14, a pressure gauge 15, etc.
With the treatment apparatus shown in fig. 1, the exhaust gas discharged contains: the particle is less than 10mg/m3Nitrogen oxides < 100mg/m3Sulfuric acid mist is less than 10mg/m3Hydrogen sulfide < 5mg/m3And the emission standard of atmospheric pollutants is reached.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made 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 and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. An ultra-clean treatment device for titanium dioxide acidolysis tail gas is characterized by comprising an empty tower, a spray tower and a low-temperature plasma system which are sequentially connected;
the water supply system is respectively connected with the empty tower, the spray tower and the low-temperature plasma system and is used for providing water for spraying the empty tower and the spray tower and water for cooling and cleaning the low-temperature plasma system;
the empty tower is also connected with a titanium dioxide acidolysis reactor and is used for spraying the received titanium dioxide acidolysis tail gas for primary cooling and removing large particulate matters, and then discharging the titanium dioxide acidolysis tail gas to the spray tower; the spray tower is used for further spraying, cooling and removing part of small particulate matters from the titanium dioxide acidolysis tail gas, and then discharging the titanium dioxide acidolysis tail gas to the low-temperature plasma system; the low-temperature plasma system is used for decomposing the titanium dioxide acidolysis tail gas.
2. The ultra-clean treatment device for titanium dioxide acidolysis tail gas as claimed in claim 1,
the empty tower and the spray tower are both provided with spray water inlets and outlets, and the low-temperature plasma system is provided with a cooling water inlet and outlet and a cleaning water inlet and outlet; the water supply system comprises a primary water tank, a sewage treatment tank and a circulating water tank; the sewage treatment tank is provided with a sewage inlet and a sewage outlet; the circulating water pool is provided with a circulating water inlet and a circulating water outlet;
a cooling water inlet and a cleaning water inlet of the low-temperature plasma system are connected with the primary water tank, a cooling water outlet is connected with a circulating water inlet of the circulating water tank, and a cleaning water outlet is connected with a sewage inlet of the sewage treatment tank;
spray water inlets of the empty tower and the spray tower are connected with a circulating water outlet of the circulating water pool, and a spray water outlet is connected with a sewage inlet of the sewage treatment pool;
and the sewage outlet of the sewage treatment tank is connected with the circulating water inlet of the circulating water tank.
3. The ultra-clean treatment device for titanium dioxide acidolysis tail gas as claimed in claim 2,
the spray tower is also provided with a cleaning water inlet, and the cleaning water inlet of the spray tower is connected with the primary water tank.
4. The ultra-clean treatment device for titanium dioxide acidolysis tail gas as claimed in claim 2,
the inlet of the cooling tower is respectively connected with the cleaning water outlet of the low-temperature plasma system, the spray water outlet of the spray tower and the spray water outlet of the empty tower; and the outlet of the cooling tower is connected with the sewage inlet of the sewage treatment tank.
5. The ultra-clean treatment device for titanium dioxide acidolysis tail gas as claimed in claim 1,
the low-temperature plasma system is characterized by further comprising a chimney, and the chimney is connected with the low-temperature plasma system.
6. The ultra-clean treatment device for titanium dioxide acidolysis tail gas as claimed in claim 5,
and a fan is arranged between the low-temperature plasma system and the chimney.
7. The ultra-clean treatment device for titanium dioxide acidolysis tail gas as claimed in claim 1,
the spray tower has a three-layer spray structure, and from top to bottom, one layer sprays the layer bottom and is the baffling layer, and two layers spray the layer bottom and be first filter layer, and the three-layer sprays the layer bottom and is the second filter layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020869863.3U CN212492322U (en) | 2020-05-22 | 2020-05-22 | Ultra-clean processing apparatus of titanium dioxide acidolysis tail gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020869863.3U CN212492322U (en) | 2020-05-22 | 2020-05-22 | Ultra-clean processing apparatus of titanium dioxide acidolysis tail gas |
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| CN212492322U true CN212492322U (en) | 2021-02-09 |
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| CN202020869863.3U Active CN212492322U (en) | 2020-05-22 | 2020-05-22 | Ultra-clean processing apparatus of titanium dioxide acidolysis tail gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114735748A (en) * | 2022-04-28 | 2022-07-12 | 龙佰集团股份有限公司 | Method for washing titanium dioxide by using high ammonia nitrogen wastewater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114735748A (en) * | 2022-04-28 | 2022-07-12 | 龙佰集团股份有限公司 | Method for washing titanium dioxide by using high ammonia nitrogen wastewater |
| CN114735748B (en) * | 2022-04-28 | 2023-10-13 | 龙佰集团股份有限公司 | Method for washing titanium white by using high ammonia nitrogen wastewater |
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Address after: 454150 northeast corner of Jiaoke road jingsan Road intersection, zhongzhan District, Jiaozuo City, Henan Province Patentee after: Longbai Group Co.,Ltd. Address before: 454150 northeast corner of Jiaoke road jingsan Road intersection, zhongzhan District, Jiaozuo City, Henan Province Patentee before: LOMON BILLIONS GROUP Co.,Ltd. |