CN210814661U - Nitrogen oxide waste gas and acid mist combined recovery device - Google Patents
Nitrogen oxide waste gas and acid mist combined recovery device Download PDFInfo
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- CN210814661U CN210814661U CN201921347916.9U CN201921347916U CN210814661U CN 210814661 U CN210814661 U CN 210814661U CN 201921347916 U CN201921347916 U CN 201921347916U CN 210814661 U CN210814661 U CN 210814661U
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Abstract
The utility model discloses a recovery unit is united with acid mist to nitrogen oxide waste gas, including iron oxide red oxidation bucket, the waste gas absorption tower, a control cabinet, first receiving tank, jar and condenser are received to the second, iron oxide red oxidation bucket is connected with the condenser through first blast pipe, the export of condenser is connected with three way connection through first connecting pipe, be connected with first solenoid valve on three way connection's the first gas vent, be connected with the second solenoid valve on three way connection's the second gas vent, first receiving tank passes through the second connecting pipe and is connected with first solenoid valve, the second receiving tank passes through the third connecting pipe and is connected with the second solenoid valve, first receiving tank and second receiving tank are connected with the waste gas absorption tower through the pipeline respectively, control center respectively with the timer, first solenoid valve, the second solenoid valve electricity is connected. The device can carry out the branch period to the nitric acid fog and the sulfuric acid fog that the iron oxide red oxidation bucket produced and collect, carries out alkali lye to the nitrogen oxide waste gas that the full period produced simultaneously and absorbs, has reduced the pollution of environment.
Description
Technical Field
The utility model relates to a waste gas treatment technical field, more specifically say, it relates to a recovery unit is united with acid mist to nitrogen oxide waste gas.
Background
Iron oxide of the formula Fe2O3Also known as burnt limonite, burnt ocher, red lead, iron oxide red, red powder, etc. The red brown powder is a low-grade pigment, is industrially called iron oxide red, is used for coloring paint, rubber, plastics, buildings and the like, is an inorganic pigment, is used as an antirust pigment in the coating industry, and is used as a pigment for the greatest application of iron oxide. In the production process of iron oxide red, in the first 5 hours of production, produce nitric acid fog and nitrogen oxide waste gas, in the later 5 hours, produce sulfuric acid fog and nitrogen oxide waste gas, if directly discharge these waste gas and acid mist to the atmosphere and cause environmental pollution, do not accord with the requirement of environmental protection, therefore, need to design a nitrogen oxide waste gas and acid mist and unite recovery unit urgently.
SUMMERY OF THE UTILITY MODEL
The utility model provides a to the not enough of prior art existence, the utility model provides a recovery unit is united with acid mist to nitrogen oxide waste gas, its advantage lies in that the device can carry out the timesharing to the nitric acid fog that iron oxide red oxidation barrel produced earlier stage and the sulfuric acid fog that the later stage produced and collect respectively, carries out alkali lye to the nitrogen oxide waste gas that the full period produced simultaneously and absorbs, has reduced the pollution of environment.
In order to achieve the above purpose, the utility model provides a following technical scheme: a combined recovery device for nitrogen oxide waste gas and acid mist comprises an iron oxide red oxidation barrel, a waste gas absorption tower, a control cabinet, a first receiving tank, a second receiving tank and a condenser, wherein the first receiving tank is used for collecting the nitric acid mist formed by condensation of the condenser, the second receiving tank is used for collecting the sulfuric acid mist formed by condensation of the condenser, an air blower is arranged on the iron oxide red oxidation barrel, an air outlet of the air blower is communicated with a cavity of the iron oxide red oxidation barrel, the iron oxide red oxidation barrel is connected with an inlet of the condenser through a first exhaust pipe, an outlet of the condenser is connected with a three-way joint through a first connecting pipe, the three-way joint comprises an air inlet, a first exhaust port and a second exhaust port, the first connecting pipe is connected with the air inlet of the three-way joint, a first electromagnetic valve is connected on the first exhaust port of the three-way joint, and a second, the first receiving tank is connected with the first electromagnetic valve through a second connecting pipe, the second receiving tank is connected with the second electromagnetic valve through a third connecting pipe, the first receiving tank and the second receiving tank are respectively connected with the waste gas absorption tower through a pipeline, alkali liquor is arranged in the waste gas absorption tower, a second exhaust pipe is further arranged on the waste gas absorption tower, a control center and a timer are arranged in the control cabinet, and the control center is respectively electrically connected with the timer, the first electromagnetic valve and the second electromagnetic valve. In the production process of iron oxide red, nitrogen oxide waste gas and nitric acid mist are generated within the first 5 hours of production, nitrogen oxide waste gas and sulfuric acid mist are generated within the last 5 hours, when the device is in an initial state, the first electromagnetic valve is in an open state, the second electromagnetic valve is in a closed state, meanwhile, a timer is preset for a period of time (5 hours), a control center sends a signal to the timer, the timer is started, under the action of an air blower, the nitrogen oxide waste gas and the nitric acid mist generated in an iron oxide red oxidation barrel enter a condenser through a first exhaust pipe, the nitrogen oxide waste gas and the nitric acid mist are condensed and liquefied through the condenser to form nitric acid liquid and the nitrogen oxide waste gas enter a first receiving tank, the liquefied nitric acid liquid is collected by the first receiving tank, and meanwhile, the nitrogen oxide waste gas enters a waste gas absorption tower through a first pipeline and is mixed; after 5 hours, the timer reaches preset time, the timer sends a signal to the control center, the control center receives the signal, the first electromagnetic valve is controlled to be closed, the second electromagnetic valve is started to be opened, nitrogen oxide waste gas and sulfuric acid mist generated in the iron oxide red oxidation barrel enter the condenser through the first exhaust pipe, the nitrogen oxide waste gas and the sulfuric acid mist are condensed and liquefied through the condenser to form sulfuric acid liquid and the nitrogen oxide waste gas enter the second receiving tank, and the second receiving tank collects the sulfuric acid liquid formed through liquefaction; meanwhile, the nitrogen oxide waste gas enters the waste gas absorption tower through a second pipeline and is mixed with the alkali liquor, and then is absorbed by the alkali liquor.
Preferably, the lye is a saturated sodium hydroxide solution.
Preferably, the second exhaust pipe is further provided with an activated carbon filter screen. The active carbon filter screen can filter the gas that flows through the blast pipe, reduces harmful gas's emission.
Preferably, still be provided with agitating unit on the waste gas absorption tower, agitating unit is including setting up the motor in waste gas absorption tower upper end, the output shaft fixedly connected with pivot of motor, the pivot runs through the upper end of waste gas absorption tower and goes deep into in the cavity of waste gas absorption tower, and the position that is close to waste gas absorption tower bottom in the pivot is fixed with a plurality of stirring leaves, and the output shaft pivot of motor drives the pivot and rotates. The motor rotates and drives the pivot and rotate, and the pivot rotates and drives the stirring leaf and rotate, and the stirring leaf rotates and stirs alkali lye for nitrogen oxide waste gas and alkali lye fully contact, improve the absorption efficiency of alkali lye to waste gas.
Preferably, the plurality of stirring blades are distributed along the axial direction of the rotating shaft, and the plurality of stirring blades are arranged in a staggered manner.
Preferably, the blower is a centrifugal blower. The centrifugal fan has larger wind pressure and higher efficiency.
To sum up, the utility model discloses following beneficial effect has: the device can collect the nitric acid mist generated in the early stage of the iron oxide red oxidation barrel and the sulfuric acid mist generated in the later stage respectively in different time periods, and simultaneously absorb the alkali liquor of the nitrogen oxide waste gas generated in the whole time period, so that the environmental pollution is reduced; and the device has high automation degree, reduces manual operation and reduces production cost.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Reference numerals: 1. an iron oxide red oxidation barrel; 2. a waste gas absorption tower; 3. a first receiving tank; 4. a second receiving tank; 5. a condenser; 6. a blower; 7. a first exhaust pipe; 8. a first connecting pipe; 9. a three-way joint; 10. a first solenoid valve; 11. a second solenoid valve; 12. a second connecting pipe; 13. a third connecting pipe; 14. a first conduit; 15. a second conduit; 16. a second exhaust pipe; 17. an active carbon filter screen; 18. a motor; 19. a rotating shaft; 20. stirring the leaves.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The embodiment discloses a combined recovery device of nitrogen oxide waste gas and acid mist, as shown in fig. 1, comprising an iron oxide red oxidation barrel 1, a waste gas absorption tower 2, a control cabinet, a first receiving tank 3, a second receiving tank 4 and a condenser 5, wherein the first receiving tank 3 is used for collecting the nitric acid mist formed by condensation of the condenser 5, the second receiving tank 4 is used for collecting the sulfuric acid mist formed by condensation of the condenser 5, an air blower 6 is arranged on the iron oxide red oxidation barrel 1, the air blower 6 is a centrifugal air blower, the centrifugal air blower has larger air pressure and higher efficiency, an air outlet of the air blower 6 is communicated with a cavity of the iron oxide red oxidation barrel 1, the iron oxide red oxidation barrel 1 is connected with an inlet of the condenser 5 through a first exhaust pipe 7, an outlet of the condenser 5 is connected with a three-way joint 9 through a first connecting pipe 8, the three-way joint 9 comprises an air inlet, a first, the first connecting pipe 8 is connected with an air inlet of a three-way joint 9, a first exhaust port of the three-way joint 9 is connected with a first electromagnetic valve 10, a second exhaust port of the three-way joint 9 is connected with a second electromagnetic valve 11, a first receiving tank 3 is connected with the first electromagnetic valve 10 through a second connecting pipe 12, a second receiving tank 4 is connected with the second electromagnetic valve 11 through a third connecting pipe 13, the first receiving tank and the second receiving tank are respectively connected with the waste gas absorption tower through pipelines, namely the first receiving tank 3 is connected with the waste gas absorption tower 2 through a first pipeline 14, the second receiving tank 4 is connected with the waste gas absorption tower 2 through a second pipeline 15, the waste gas absorption tower 2 is filled with alkali liquor, the alkali liquor is saturated sodium hydroxide solution, one end of the first pipeline 14, which is close to the waste gas absorption tower 2, extends below the liquid level of the alkali liquor, one end of the second pipeline 15, which is close to the waste gas absorption tower 2, extends below the, and a second exhaust pipe 16 is also arranged on the waste gas absorption tower 2, and an activated carbon filter screen 17 is also arranged on the second exhaust pipe 16. The active carbon filter screen 17 can filter the gas of blast pipe of flowing through, reduces harmful gas's emission, is equipped with control center and timer in the switch board, and control center is connected with timer, first solenoid valve 10, second solenoid valve 11 electricity respectively, still is connected with negative-pressure air fan on first pipeline 14 and the second pipeline 15 respectively. In the production process of the iron oxide red, nitrogen oxide waste gas and nitric acid mist are generated in the first 5 hours of production, nitrogen oxide waste gas and sulfuric acid mist are generated in the last 5 hours, in the initial state of the device, the first electromagnetic valve 10 is in an open state, the second electromagnetic valve 11 is in a closed state, meanwhile, the timer presets a time (5 hours), the control center sends a signal to the timer to start the timer, under the action of the blower 6, nitrogen oxide waste gas and nitric acid mist generated in the iron oxide red oxidation barrel 1 enter the condenser 5 through the first exhaust pipe 7, are condensed and liquefied by the condenser 5 to form nitric acid liquid and nitrogen oxide waste gas, enter the first receiving tank 3, the first receiving tank 3 collects the liquefied nitric acid liquid, meanwhile, the nitrogen oxide waste gas enters the waste gas absorption tower 2 through the first pipeline 14 and is mixed with the alkali liquor, and then is absorbed by the alkali liquor; after 5 hours, the timer reaches preset time, the timer sends a signal to the control center, the control center receives the signal, the first electromagnetic valve 10 is controlled to be closed, the second electromagnetic valve 11 is started to be opened, nitrogen oxide waste gas and sulfuric acid mist generated in the iron oxide red oxidation barrel 1 enter the condenser 5 through the first exhaust pipe 7, sulfuric acid liquid and nitrogen oxide waste gas are formed by condensation and liquefaction of the condenser 5 and enter the second receiving tank 4, and the second receiving tank 4 collects the sulfuric acid liquid formed by liquefaction; meanwhile, the nitrogen oxide waste gas enters the waste gas absorption tower 2 through the second pipeline 15 and is mixed with the alkali liquor, and then is absorbed by the alkali liquor. The device can collect the nitric acid mist generated in the earlier stage of the iron oxide red oxidation barrel 1 and the sulfuric acid mist generated in the later stage at different time intervals, and simultaneously absorb the nitric oxide waste gas generated in the whole time interval by alkali liquor, so that the environmental pollution is reduced, namely, the device can carry out condensation collection and treatment of the nitric oxide waste gas on the nitric acid mist generated in the earlier stage of the iron oxide red oxidation barrel 1, and carry out condensation collection and absorption of the nitric oxide waste gas on the sulfuric acid mist generated in the later stage, so that the environmental pollution is reduced; and the device has high automation degree, reduces manual operation and reduces production cost.
Still be provided with agitating unit on the waste gas absorption tower 2, agitating unit is including setting up the motor 18 in the 2 upper ends of waste gas absorption tower, the output shaft fixedly connected with pivot 19 of motor 18, pivot 19 runs through the upper end of waste gas absorption tower 2 and deepens in the cavity of waste gas absorption tower 2, the position that is close to waste gas absorption tower 2 bottom on the pivot 19 is fixed with a plurality of stirring leaves 20, a plurality of stirring leaves 20 distribute along the axial of pivot 19, and a plurality of stirring leaves 20 crisscross setting each other, motor 18's output shaft 19 drives pivot 19 and rotates. The motor 18 rotates and drives the rotating shaft 19 to rotate, the rotating shaft 19 rotates and drives the stirring blades 20 to rotate, and the stirring blades 20 rotate to stir the alkali liquor, so that the nitrogen oxide waste gas is fully contacted with the alkali liquor, and the absorption efficiency of the alkali liquor on the waste gas is improved.
The directions given in the present embodiment are merely for convenience of describing positional relationships between the respective members and the relationship of fitting with each other. It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A nitrogen oxide waste gas and acid mist combined recovery device is characterized in that: including iron oxide red oxidation bucket (1), waste gas absorption tower (2), switch board, first receiving tank (3), second receiving tank (4) and condenser (5), first receiving tank (3) are used for collecting the nitric acid fog that forms through condenser (5) condensation, and second receiving tank (4) are used for collecting the sulfuric acid fog that forms through condenser (5) condensation, are provided with air-blower (6) on iron oxide red oxidation bucket (1), the air outlet of air-blower (6) and the cavity intercommunication of iron oxide red oxidation bucket (1), iron oxide red oxidation bucket (1) through first blast pipe (7) with the access connection of condenser (5), the export of condenser (5) is connected with three way connection (9) through first connecting pipe (8), three way connection (9) include air inlet, first gas vent and second gas vent, first connecting pipe (8) with the takeover of three way connection (9) is connected, be connected with first solenoid valve (10) on the first gas vent of three way connection (9), be connected with second solenoid valve (11) on the second gas vent of three way connection (9), first receiving tank (3) are connected with first solenoid valve (10) through second connecting pipe (12), second receiving tank (4) are connected with second solenoid valve (11) through third connecting pipe (13), first receiving tank (3) with second receiving tank (4) are connected with waste gas absorption tower (2) through the pipeline respectively, alkali lye is equipped with in waste gas absorption tower (2), still is equipped with second blast pipe (16) on waste gas absorption tower (2), is equipped with control center and timer in the switch board, and control center is connected with timer, first solenoid valve (10), second solenoid valve (11) electricity respectively.
2. The combined recovery device of nitrogen oxide waste gas and acid mist according to claim 1, characterized in that: the alkali liquor is saturated sodium hydroxide solution.
3. The combined recovery device of nitrogen oxide waste gas and acid mist according to claim 1, characterized in that: and an active carbon filter screen (17) is also arranged on the second exhaust pipe (16).
4. The combined recovery device of nitrogen oxide waste gas and acid mist according to claim 1, characterized in that: still be provided with agitating unit on waste gas absorption tower (2), agitating unit is including setting up motor (18) in waste gas absorption tower (2) upper end, the output shaft fixedly connected with pivot (19) of motor (18), and in pivot (19) run through the upper end of waste gas absorption tower (2) and go deep into the cavity of waste gas absorption tower (2), the position that is close to waste gas absorption tower (2) bottom on pivot (19) is fixed with a plurality of stirring leaves (20), and output shaft pivot (19) of motor (18) drive pivot (19) and rotate.
5. The combined recovery device of nitrogen oxide waste gas and acid mist according to claim 4, characterized in that: the stirring blades (20) are distributed along the axial direction of the rotating shaft (19), and the stirring blades (20) are arranged in a staggered mode.
6. The combined recovery device of nitrogen oxide waste gas and acid mist according to claim 1, characterized in that: the blower (6) is a centrifugal blower.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921347916.9U CN210814661U (en) | 2019-08-19 | 2019-08-19 | Nitrogen oxide waste gas and acid mist combined recovery device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921347916.9U CN210814661U (en) | 2019-08-19 | 2019-08-19 | Nitrogen oxide waste gas and acid mist combined recovery device |
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| CN210814661U true CN210814661U (en) | 2020-06-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112807968A (en) * | 2020-12-23 | 2021-05-18 | 信和（天津）环保科技发展有限公司 | Harmless treatment device for industrial solid waste |
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2019
- 2019-08-19 CN CN201921347916.9U patent/CN210814661U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112807968A (en) * | 2020-12-23 | 2021-05-18 | 信和（天津）环保科技发展有限公司 | Harmless treatment device for industrial solid waste |
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