CN213171935U - Chemical wastewater treatment system - Google Patents
Chemical wastewater treatment system Download PDFInfo
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- CN213171935U CN213171935U CN202021161482.6U CN202021161482U CN213171935U CN 213171935 U CN213171935 U CN 213171935U CN 202021161482 U CN202021161482 U CN 202021161482U CN 213171935 U CN213171935 U CN 213171935U
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Abstract
The utility model discloses a chemical industry effluent disposal system, including the Fenton oxidation tower, with the collecting pit that is used for collecting the production line waste water that the water inlet of Fenton oxidation tower is connected, pass through pipeline connection's first feedway with the Fenton oxidation tower, be connected with the delivery port of Fenton oxidation tower and be used for making the first sedimentation tank that the suspended solid in the waste water precipitated, the second feedway of being connected with first sedimentation tank, be used for degrading the macromolecular substance in the waste water into the hydrolytic acidification pond of micromolecular substance with being connected of first sedimentation tank, the oxygen deficiency pond of being connected with the hydrolytic acidification pond, the contact oxidation pond of being connected with the oxygen deficiency pond, and the second sedimentation tank of being connected with the contact oxidation pond. This system jointly uses Fenton oxidation tower, first sedimentation tank, hydrolysis-acidification pool, oxygen deficiency pond, contact oxidation pond, second sedimentation tank, through decomposing the organic matter twice, deposits the quartic of suspended solid, has shortened the treatment cycle of entire system to waste water, has reduced the waste water treatment cost.
Description
Technical Field
The utility model relates to a waste water treatment technical field, concretely relates to chemical industry effluent disposal system.
Background
In the chemical production process, the components of organic matters in the wastewater generated in the chemical production process are different along with the difference of the types of the produced products, so that the types of the organic matters in the wastewater are more. If the wastewater in the chemical production process is simply treated and then directly discharged to the wastewater treatment center of the industrial base, different organic matters in the wastewater among different factories are different due to different products produced by different factories, so that the organic matters in the wastewater are bound to react, organic matters which are more difficult to decompose are probably generated, and the difficulty of the wastewater treatment center of the industrial base is increased.
Therefore, the method aims to better save energy and reduce the difficulty of the wastewater treatment center of the industrial base. Therefore, a chemical wastewater treatment system with simple process and short treatment period is important at this moment.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems existing in the prior art, the utility model provides a chemical wastewater treatment system.
In order to achieve the above object, the utility model adopts the following technical scheme:
a chemical wastewater treatment system comprises a Fenton oxidation tower, a collecting tank which is connected with a water inlet of the Fenton oxidation tower and is used for collecting production line wastewater, a first feeding device connected with the Fenton oxidation tower through a pipeline, a first sedimentation tank connected with the water outlet of the Fenton oxidation tower and used for promoting the sedimentation of suspended matters in the wastewater, a second feeding device connected with the first sedimentation tank, and a hydrolysis acidification tank connected with the first sedimentation tank, wherein the hydrolysis acidification tank is used for degrading macromolecular substances in the wastewater into micromolecular substances, an anoxic tank connected with the hydrolysis acidification tank, a contact oxidation tank connected with the anoxic tank, an aeration fan connected with the contact oxidation tank and used for providing air for the contact oxidation tank, and a second sedimentation tank connected with the contact oxidation tank, and supernatant in the first sedimentation tank flows into the hydrolysis acidification tank, and supernatant obtained after the treated wastewater is precipitated in the second sedimentation tank is discharged after reaching the standard.
Furthermore, the system also comprises a sludge concentration tank which is connected with the collection tank, the first sedimentation tank and the second sedimentation tank and is used for collecting sludge in the collection tank, the first sedimentation tank and the second sedimentation tank, and a filter press which is connected with the sludge concentration tank and is used for filtering and drying sludge, wherein supernatant in the sludge concentration tank flows back to the collection tank, part of sludge in the sludge concentration tank flows back to the anoxic tank, and the rest sludge enters the filter press for filtering and drying.
Further, the first sedimentation tank is connected with an aeration fan for providing air.
Further, the first feeding device comprises a sulfuric acid tank, a hydrogen peroxide tank and a ferrous sulfate tank, wherein the sulfuric acid tank is connected with the Fenton oxidation tower and used for adjusting wastewater to be acidic, the hydrogen peroxide tank is connected with the Fenton oxidation tower, and the ferrous sulfate tank is connected with the Fenton oxidation tower, and the Fenton oxidation tower is connected with the sulfuric acid tank, the hydrogen peroxide tank and the ferrous sulfate tank through pipelines.
Further, the second feeding device comprises an alkali liquor tank, a PAC flocculant tank and a PAM flocculant tank, wherein the alkali liquor tank is connected with the first sedimentation tank and used for adjusting the waste water in the first sedimentation tank to be neutral, the PAC flocculant tank and the PAM flocculant tank are connected with the first sedimentation tank and used for promoting substances in the waste water in the first sedimentation tank to precipitate, and the alkali liquor tank, the PAC flocculant tank, the PAM flocculant tank and the first sedimentation tank are all connected through pipelines.
Further, supernatant in the sludge concentration tank flows back to the collection tank; and part of the wastewater treated by the contact oxidation tank flows back to the anoxic tank.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) this system jointly uses Fenton oxidation tower, first sedimentation tank, hydrolysis-acidification pool, oxygen deficiency pond, contact oxidation pond, second sedimentation tank, utilizes the Fenton oxidation tower can be quick with the organic matter decomposition to shorten entire system to the treatment cycle of waste water, reduced the waste water treatment cost. And the organic matters in the wastewater are decomposed twice and suspended matters are precipitated for 4 times, so that the wastewater discharge reaches the standard.
(2) The utility model discloses a can be thorough decompose the organic matter in the waste water, carried out degradation twice to the organic matter in the waste water. The first time, organic matters which are difficult to decompose in the wastewater are degraded by a Fenton oxidation tower, and the organic matters in the wastewater are decomposed by hydroxyl radicals (. OH) with strong oxidizing property generated by chain reaction of hydrogen peroxide and ferrous sulfate in an acid environment. And in the hydrolysis acidification tank, microorganisms are utilized to degrade macromolecular substances in the wastewater into micromolecular substances, so that the BOD/COD ratio in the wastewater is increased, and the difficulty coefficient of standard discharge of wastewater treatment in subsequent anoxic tanks and contact oxidation tanks is reduced.
(3) The utility model discloses a waste water after the messenger adopts this system to handle can carry out discharge to reach standard, has mainly carried out the deposit of quartic suspended solid in to the waste water in entire system, and bold material deposits into mud through the collecting pit in with waste water for the first time and discharges. The second time uses hydrogen peroxide and ferrous sulfate in the Fenton oxidation tower to generate chain reaction in the acid environment to generate Fe (OH) with adsorption function3The colloid enables small suspended matters in the wastewater to be agglomerated to form larger suspended matters and enter a first sedimentation tank along with the wastewater; thirdly, in the first sedimentation tank, the suspended matters with different sizes are sedimented together under the action of PAC flocculant and PAM flocculant to form sludge, and the sedimentation removes most suspended matters in the wastewater; the fourth sedimentation is in the second sedimentation tank. This system is through quartic precipitation treatment to waste water, has reduced the content of the suspended solid in the waste water discharge, makes the waste water after adopting this system to handle discharge to reach standard.
(4) The system reflows part of sludge in the sludge concentration tank to the anoxic tank, so that on one hand, the discharge of the sludge is reduced, and on the other hand, the demand of the anoxic tank on microorganisms in the denitrification process is supplemented.
(5) The system reflows part of wastewater treated by the contact oxidation tank to the anoxic tank for re-denitrification, so that the excessive ammonia nitrogen content in the wastewater discharged from the two sedimentation tanks is avoided.
Drawings
FIG. 1 is a schematic view of a chemical wastewater treatment system provided by the present invention.
1-Fenton oxidation tower, 2-collection pool, 3-first sedimentation tank, 4-hydrolysis acidification tank, 5-anoxic tank, 6-contact oxidation tank, 7-aeration fan, 8-second sedimentation tank, 9-sludge concentration tank, 10-filter press, 11-sulfuric acid tank, 12-hydrogen peroxide tank, 13-ferrous sulfate tank, 14-lye tank, 15-PAC flocculant tank, 16-PAM flocculant tank, 17-wastewater flow direction and 18-sludge flow direction.
Detailed Description
The present invention will be further described with reference to the following drawings and examples, which include but are not limited to the following examples.
As shown in fig. 1, the system comprises a collecting tank 2, a Fenton oxidation tower 1, a first sedimentation tank 3, a hydrolysis acidification tank 4, an anoxic tank 5, a contact oxidation tank 6 and a second sedimentation tank 8. Specifically, a collecting tank 2 for collecting production line waste water is connected with a water inlet of a Fenton oxidation tower 1, a first sedimentation tank 3 is connected with a water outlet of the Fenton oxidation tower 1, a hydrolysis acidification tank 4 is connected with the first sedimentation tank 3, an anoxic tank 5 is connected with the hydrolysis acidification tank 4, a contact oxidation tank 6 is connected with the anoxic tank 5, a second sedimentation tank 8 is connected with the contact oxidation tank 6, a sludge concentration tank 9 is connected with the collecting tank, the first sedimentation tank and the second sedimentation tank and used for collecting sludge formed in the collecting tank, the first sedimentation tank and the second sedimentation tank, and a filter press 10 is connected with the sludge concentration tank 9. And the supernatant in the first sedimentation tank enters a hydrolysis acidification tank, and the wastewater reaching the treatment standard is precipitated in a second sedimentation tank and then discharged.
As shown in fig. 1, in order to compensate for the problem that the denitrification efficiency is lowered due to the passage of microorganisms in the anoxic tank, a portion of sludge in the sludge concentration tank is returned to the anoxic tank. In addition, in order to avoid the high content of ammonia nitrogen in the wastewater discharged from the second sedimentation tank, the wastewater treated by the contact oxidation tank partially flows back to the anoxic tank to further reduce the content of ammonia nitrogen in the wastewater.
As shown in FIG. 1, in order to increase the oxygen content in the wastewater in the first sedimentation tank and the contact oxidation tank, promote the smooth reaction in the contact oxidation tank and the oxygen demand for the growth of microorganisms in the system, the first sedimentation tank 3 and the contact oxidation tank 6 are both connected with an aeration fan 7 for supplying air.
As shown in fig. 1, the Fenton oxidation tower is also connected with a first feeding device. Wherein, the first feeding device comprises a sulfuric acid tank 11, a hydrogen peroxide tank 12 and a ferrous sulfate tank 13. Specifically, the sulfuric acid tank, the hydrogen peroxide tank and the ferrous sulfate tank are all connected with the Fenton oxidation tower 1 through pipelines.
As shown in fig. 1, the first settling tank is also connected with a second feeding device. Wherein, the second feeding device comprises an alkali liquor tank 14, a PAC flocculating agent tank 15 and a PAM flocculating agent tank 16. Specifically, the lye tank, the PAC flocculant tank and the PAM flocculant tank are all connected with the first sedimentation tank 3 through pipelines.
As shown in fig. 1, in order to prevent the waste water in the sludge concentration tank from being discharged together with the sludge without being treated, the supernatant in the sludge concentration tank is returned to the collection tank 2.
As shown in fig. 1, wastewater in the system flows in a wastewater flow direction 17 and sludge in the system flows in a sludge flow direction 18.
On the basis of the above, the specific embodiment of the system is as follows:
firstly, the wastewater of the production line enters a collecting tank to be collected, then the wastewater is sent into a Fenton oxidation tower from the collecting tank through a water inlet of the Fenton oxidation tower, and the sludge in the collecting tank enters a sludge concentration tank. The wastewater in the Fenton oxidation tower is firstly adjusted to be acidic through a sulfuric acid tank, and then hydrogen peroxide and ferrous sulfate are introduced into the Fenton oxidation tower through a hydrogen peroxide tank and a ferrous sulfate tank to promote the decomposition of organic matters in the wastewater. The waste water after the treatment of the Fenton oxidation tower is sent into a first sedimentation tank through a water outlet of the Fenton oxidation tower, firstly, alkaline solution is added into the first sedimentation tank through an alkali liquor tank to adjust the waste water to be neutral, then, the PAC flocculating agent tank and the PAM flocculating agent tank are used for adding PAC flocculating agent and PAM flocculating agent into the first sedimentation tank, air is sent into the first sedimentation tank through an aeration fan, suspended matters in the waste water are precipitated to form sludge, the formed sludge enters a sludge concentration tank, and the supernatant is sent into a hydrolysis acidification tank. Macromolecular substances in the wastewater entering the hydrolysis acidification tank are degraded into small molecular substances. The wastewater treated by the hydrolytic acidification tank firstly enters an anoxic tank, denitrification reaction is carried out in the anoxic tank, and nitrate substances of the wastewater are converted into nitrogen at the moment. The wastewater treated by the anoxic tank enters a contact oxidation tank, air is introduced into the contact oxidation tank through an aeration fan, and nitrification and denitrification reactions are carried out in the contact oxidation tank, so that ammonia nitrogen in the wastewater is further reduced; in addition, a part of the wastewater treated by the contact oxidation pond flows back to the anoxic pond for further denitrification. At the same time. And precipitating the wastewater treated by the contact oxidation tank by a second sedimentation tank, discharging the supernatant reaching the standard, and feeding the sludge formed on the lower layer into a sludge concentration tank. Part of sludge collected by the sludge concentration tank flows back to the anoxic tank to compensate for the passing of microorganisms in the anoxic tank, and the biological sludge is treated by the filter press and then discharged after reaching the standard; in addition, the supernatant formed in the sludge concentration tank flows back to the collection tank for secondary treatment.
The above embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the protection scope of the present invention, but all the insubstantial changes or modifications made in the spirit and the idea of the main design of the present invention, the technical problems solved by the embodiment are still consistent with the present invention, and all should be included in the protection scope of the present invention.
Claims (6)
1. A chemical wastewater treatment system is characterized by comprising a Fenton oxidation tower (1), a collection tank (2) connected with a water inlet of the Fenton oxidation tower (1) and used for collecting production line wastewater, a first feeding device connected with the Fenton oxidation tower (1) through a pipeline, a first sedimentation tank (3) connected with a water outlet of the Fenton oxidation tower (1) and used for promoting suspended matters in the wastewater to precipitate, a second feeding device connected with the first sedimentation tank (3), a hydrolysis acidification tank (4) connected with the first sedimentation tank (3), an anoxic tank (5) connected with the hydrolysis acidification tank (4), a contact oxidation tank (6) connected with the anoxic tank (5), and a fan (7) connected with the contact oxidation tank (6) and used for providing air for the contact oxidation tank, and the second sedimentation tank (8) is connected with the contact oxidation tank (6), wherein the supernatant in the first sedimentation tank flows into the hydrolysis acidification tank, and the supernatant after the treated wastewater is precipitated in the second sedimentation tank is discharged after reaching the standard.
2. The chemical wastewater treatment system according to claim 1, further comprising a sludge concentration tank (9) connected with the collection tank (2), the first sedimentation tank (3) and the second sedimentation tank (8) and used for collecting sludge in the collection tank, the first sedimentation tank and the second sedimentation tank, and a filter press (10) connected with the sludge concentration tank (9) and used for drying sludge, wherein supernatant in the sludge concentration tank flows back to the collection tank, part of sludge in the sludge concentration tank flows back to the anoxic tank, and the rest sludge enters the filter press for drying.
3. A chemical wastewater treatment system according to claim 2, characterized in that the first sedimentation tank (3) is connected to an aeration fan (7) for supplying air.
4. The chemical wastewater treatment system according to claim 3, wherein the first feeding device comprises a sulfuric acid tank (11) connected with the Fenton oxidation tower (1) and used for adjusting wastewater, a hydrogen peroxide tank (12) connected with the Fenton oxidation tower (1), and a ferrous sulfate tank (13) connected with the Fenton oxidation tower (1), wherein the Fenton oxidation tower is in pipeline connection with the sulfuric acid tank, the hydrogen peroxide tank and the ferrous sulfate tank.
5. The chemical wastewater treatment system according to claim 4, wherein the second feeding device comprises a lye tank (14) connected with the first sedimentation tank (3) and used for adjusting the wastewater in the first sedimentation tank to be neutral, a PAC flocculant tank (15) and a PAM flocculant tank (16) connected with the first sedimentation tank (3) and used for promoting the precipitation of substances in the wastewater in the first sedimentation tank, wherein the lye tank, the PAC flocculant tank, the PAM flocculant tank and the first sedimentation tank are all connected by pipelines.
6. The chemical wastewater treatment system according to any one of claims 2 to 5, wherein the supernatant in the sludge concentration tank is returned to the collection tank; and part of the wastewater treated by the contact oxidation tank flows back to the anoxic tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021161482.6U CN213171935U (en) | 2020-06-19 | 2020-06-19 | Chemical wastewater treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021161482.6U CN213171935U (en) | 2020-06-19 | 2020-06-19 | Chemical wastewater treatment system |
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| Publication Number | Publication Date |
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| CN213171935U true CN213171935U (en) | 2021-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021161482.6U Active CN213171935U (en) | 2020-06-19 | 2020-06-19 | Chemical wastewater treatment system |
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| CN (1) | CN213171935U (en) |
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