CN218501699U - Biochemical odor circulating water recycling system - Google Patents
Biochemical odor circulating water recycling system Download PDFInfo
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- CN218501699U CN218501699U CN202222249853.1U CN202222249853U CN218501699U CN 218501699 U CN218501699 U CN 218501699U CN 202222249853 U CN202222249853 U CN 202222249853U CN 218501699 U CN218501699 U CN 218501699U
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Abstract
The utility model discloses a biochemical odor circulating water recycling system, which comprises a primary washing tower and a secondary washing tower, wherein the primary washing tower is connected with a waste gas inlet pipe and a sodium hydroxide adding device, the waste gas inlet pipe is connected with a first hydrogen sulfide concentration detector, and a first pH online monitor is arranged in the primary washing tower; the second-stage washing tower is connected with the first-stage washing tower and used for treating unabsorbed hydrogen sulfide gas, a gas inlet of the second-stage washing tower is connected with a second hydrogen sulfide concentration detector, the second-stage washing tower is connected with a sodium hypochlorite adding device, a second pH on-line monitor and an ORP monitor probe are further arranged in the second-stage washing tower, and the sodium hypochlorite adding device can be controlled according to a detection value of the ORP monitor probe to add the sodium hypochlorite until the residual hydrogen sulfide gas is completely removed and then stops. The utility model discloses control reaction direction that can be accurate generates more target products as far as, finally reaches the purpose of carrying out recycle with the circulating water in the two-stage scrubbing tower.
Description
Technical Field
The utility model relates to a biochemical foul smell circulating water recycle system.
Background
In recent years, with the deep development of economic society, the resource environment contradiction is increasingly prominent, and the sustainable development is particularly important in the future.
In a factory for industrial wastewater treatment or domestic sewage treatment, most of circulating water for absorbing saturated biochemical waste gas is not recycled, enterprises with low biochemical waste gas concentration generally discharge replaced waste gas circulating water into a biochemical treatment system, and the saturated circulating water can release the originally absorbed waste gas again after being treated by the biochemical system, so that the treatment load of the waste gas treatment system is increased, and more waste is caused; and enterprises with higher waste gas concentration discharge the replaced waste gas circulating water into a pretreatment system at the front end of biochemical treatment for pretreatment and then discharge the waste gas circulating water into a biochemical system, so that resources of the front-end pretreatment system are occupied, and more resources are wasted.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a biochemical foul smell circulating water recycle system, the tradition that aims at solving and exists among the prior art can increase system's operational load to the processing of exhaust-gas circulation water, occupies system's processing resources, does not carry out recycle to exhaust-gas circulation water moreover and leads to the extravagant technical problem of resource.
The technical scheme of the utility model is that: a biochemical odor circulating water recycling system comprises a first-stage washing tower and a second-stage washing tower, wherein the first-stage washing tower is connected with a waste gas inlet pipe and a sodium hydroxide adding device, the waste gas inlet pipe is connected with a first hydrogen sulfide concentration detector, and a first pH online monitor is arranged in the first-stage washing tower; the second-stage washing tower is connected with the first-stage washing tower and used for treating unabsorbed hydrogen sulfide gas, and the gas inlet of the second-stage washing tower is connected with a second hydrogen sulfide concentration detector, is connected with a sodium hypochlorite adding device on the second-stage washing tower, and a second pH on-line monitor and an ORP monitor probe are also arranged in the second-stage washing tower, and the sodium hypochlorite adding device can be controlled according to the detection value of the ORP monitor probe to add until the residual hydrogen sulfide gas is completely removed and then stops.
Further, in the utility model discloses in the one-level scrubbing tower still is connected with the one-level result recovery unit that is used for collecting the sulphide solution that the reaction generated.
Furthermore, in the utility model, the second-stage washing tower is also connected with a solid-liquid separation device for recovering the elemental sulfur generated by the reaction.
Furthermore, in the utility model, the gas outlet of the second-stage washing tower is also connected with a third hydrogen sulfide concentration detector.
Further, the utility model discloses in all be equipped with spray set in one-level scrubbing tower and the second grade scrubbing tower, the bottom of two scrubbing towers all is connected through the circulating pump spray set.
Furthermore, in the utility model, a packing layer is arranged below the spraying device.
Compared with the prior art, the utility model has the following advantage: the utility model treats most hydrogen sulfide gas by absorption in the first-stage washing tower, and the generated sulfide solution is collected and can be reused as heavy metal catching raw material by using the reaction of excessive sodium hydroxide and hydrogen sulfide; the second-stage washing tower is used for continuously absorbing hydrogen sulfide gas which is not absorbed by the first-stage washing tower, sodium hypochlorite is utilized to directly react with the hydrogen sulfide, the generated elemental sulfur can be provided as a new available resource by a solid-liquid separation device, the dosage of the sodium hypochlorite is controlled, the hydrogen sulfide gas in the waste gas is just removed, the elemental sulfur generated by continuously and excessively adding the drug is avoided to be converted into sulfate radicals, an ORP monitor probe is utilized to collect ORP potential in real time and control the adding amount of the sodium hypochlorite, so that the reaction direction is accurately controlled, more target products are generated as far as possible, and the purpose of recycling the circulating water in the two-stage washing tower is finally achieved.
Drawings
Fig. 1 is a schematic structural diagram of the system of the present invention.
Wherein: 1. a first-stage washing tower; 2. a secondary washing tower; 3. an exhaust gas inlet pipe; 4. a sodium hydroxide adding device; 5. a first hydrogen sulfide concentration detector; 6. a first pH on-line monitor; 7. a second hydrogen disulfide concentration detector; 8. a sodium hypochlorite adding device; 9. a second pH on-line monitor; 10. an ORP monitor probe; 11. a primary product recovery unit; 12. a solid-liquid separation device; 13. a third hydrogen sulfide concentration detector; 14. a spraying device; 15. a circulation pump; 16. a filler layer.
Detailed Description
The following description will specifically explain embodiments of the present invention with reference to the accompanying drawings.
Example (b):
combine the figure to show the utility model discloses a biochemical foul smell circulating water recycle system's embodiment, it mainly includes one-level scrubbing tower 1 and second grade scrubbing tower 2, and one-level scrubbing tower 1 is connected with waste gas intake pipe 3, is connected with first hydrogen sulfide concentration detector 5 in the waste gas intake pipe 3, and waste gas gets into one-level scrubbing tower 1 from waste gas intake pipe 3, and first hydrogen sulfide concentration detector 5 is arranged in monitoring waste gas hydrogen sulfide concentration.
The first-stage washing tower 1 is connected with a sodium hydroxide adding device 4, excessive sodium hydroxide is used for absorbing hydrogen sulfide to react to generate sodium sulfide and water, and the reaction equation is as follows:
2NaOH+H 2 S＝Na 2 S+2H 2 O
it is known that sulfides have a good effect on the removal of heavy metal ions. Therefore, the product of the first-stage washing tower 1 can be used as a collector for removing heavy metals for sewage plants. In this embodiment, the primary washing tower 1 is connected to a primary product recovery unit 11, and the sulfide solution generated by the reaction is collected for reuse.
In this embodiment, a first online pH monitor 6 is disposed in the first-stage scrubber tower 1, the first online pH monitor 6 is used to control the pH of the first-stage scrubber tower 1 within a range of 10 to 11, and hydrogen sulfide in the exhaust gas reacts with sodium hydroxide under an alkaline condition.
The second-stage washing tower 2 is connected with the first-stage washing tower 1 and is used for treating the hydrogen sulfide gas which is not absorbed in the first stage, a second hydrogen sulfide concentration detector 7 is connected to a gas inlet of the second-stage washing tower 2 and is used for monitoring the concentration of the hydrogen sulfide gas which is input into the second-stage washing tower 2, and the treatment effect of the first-stage washing tower 1 can be seen through data comparison with the first hydrogen sulfide concentration detector 5.
Be connected with sodium hypochlorite on the second grade scrubbing tower 2 and throw feeder apparatus 8, sodium hypochlorite itself has the oxidizing property, can reach the purpose of getting rid of with the reducing gas oxidation in the waste gas, and sodium hypochlorite can directly react with hydrogen sulfide, and the equation of reaction is:
H 2 S+NaClO＝NaCl+S↓+H 2 O
the reaction can generate elemental sulfur, and the high-purity elemental sulfur can be utilized as a resource. In this embodiment, the secondary washing tower 2 is connected to a solid-liquid separation device 12, and elemental sulfur generated by the reaction is recovered by means of solid-liquid separation.
For controlling the dosing amount of sodium hypochlorite, hydrogen sulfide gas in waste gas is completely removed, and elemental sulfur generated by continuously and excessively dosing is prevented from being converted into sulfate radicals.
Further, a second pH on-line monitor 9 is arranged in the secondary washing tower 2 and used for controlling the pH of the secondary washing tower 2.
The gas outlet of the second-stage washing tower 2 is also connected with a third hydrogen sulfide concentration detector 13 for monitoring the concentration of hydrogen sulfide at the outlet of the second-stage washing tower 2, the treatment effect of the second-stage washing tower 2 can be seen by comparing the data with the second hydrogen sulfide concentration detector 7, and the complete treatment of waste gas is guaranteed.
In addition, spray devices 14 are arranged in the first-stage washing tower 1 and the second-stage washing tower 2, the bottoms of the two washing towers are connected with the spray devices 14 through circulating pumps 15, and a packing layer 16 is arranged below the spray devices 14.
It should be understood that the above-mentioned embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and the protection scope of the present invention cannot be limited thereby. All modifications made according to the spirit of the main technical solutions of the present invention should be covered within the protection scope of the present invention.
Claims (6)
1. A biochemical odor circulating water recycling system is characterized in that: the device comprises a first-stage washing tower (1) and a second-stage washing tower (2), wherein the first-stage washing tower (1) is connected with a waste gas inlet pipe (3) and a sodium hydroxide adding device (4), the waste gas inlet pipe (3) is connected with a first hydrogen sulfide concentration detector (5), and a first pH online monitor (6) is arranged in the first-stage washing tower (1); the secondary washing tower (2) is connected with the primary washing tower (1) and is used for treating unabsorbed hydrogen sulfide gas, the gas inlet of the secondary washing tower (2) is connected with a second hydrogen sulfide concentration detector (7), the secondary washing tower (2) is connected with a sodium hypochlorite adding device (8), a second pH on-line monitor (9) and an ORP monitor probe (10) are further arranged in the secondary washing tower (2), and the sodium hypochlorite adding device (8) can be controlled according to the detection value of the ORP monitor probe (10) to add until the residual hydrogen sulfide gas is completely removed and then stops.
2. The biochemical odor circulating water recycling system according to claim 1, characterized in that: the primary washing tower (1) is also connected with a primary product recovery device (11) for collecting sulfide solution generated by the reaction.
3. The biochemical odor circulating water recycling system according to claim 1, characterized in that: the secondary washing tower (2) is also connected with a solid-liquid separation device (12) for recovering elemental sulfur generated by the reaction.
4. The biochemical odor circulating water recycling system according to claim 1, characterized in that: and a gas outlet of the secondary washing tower (2) is also connected with a third hydrogen sulfide concentration detector (13).
5. The biochemical odor circulating water recycling system according to claim 1, characterized in that: and spraying devices (14) are arranged in the first-stage washing tower (1) and the second-stage washing tower (2), and the bottoms of the two washing towers are connected with the spraying devices (14) through circulating pumps (15).
6. The biochemical odor circulating water recycling system according to claim 5, wherein: a packing layer (16) is arranged below the spraying device (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222249853.1U CN218501699U (en) | 2022-08-26 | 2022-08-26 | Biochemical odor circulating water recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222249853.1U CN218501699U (en) | 2022-08-26 | 2022-08-26 | Biochemical odor circulating water recycling system |
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| Publication Number | Publication Date |
|---|---|
| CN218501699U true CN218501699U (en) | 2023-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222249853.1U Active CN218501699U (en) | 2022-08-26 | 2022-08-26 | Biochemical odor circulating water recycling system |
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| Country | Link |
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| CN (1) | CN218501699U (en) |
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2022
- 2022-08-26 CN CN202222249853.1U patent/CN218501699U/en active Active
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