CN111039520A - Industrial sewage treatment system - Google Patents
Industrial sewage treatment system Download PDFInfo
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- CN111039520A CN111039520A CN202010012182.XA CN202010012182A CN111039520A CN 111039520 A CN111039520 A CN 111039520A CN 202010012182 A CN202010012182 A CN 202010012182A CN 111039520 A CN111039520 A CN 111039520A
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- aeration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/727—Treatment of water, waste water, or sewage by oxidation using pure oxygen or oxygen rich gas
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46176—Galvanic cells
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The embodiment of the invention discloses an industrial sewage treatment system, which comprises: a grid tank; the acid liquid pool is immersed with an iron-carbon filler layer which is not used for generating Fe2+ under the acidic condition; a flocculation reaction tank connected with the grid tank and receiving Fe generated from the acid liquor tank2+A solution is arranged in the flocculation reaction tank for providing an oxygenated environment and adding Fe2+Is oxidized into Fe3+Formation of Fe (OH)3An aeration device for the floccule; the primary sedimentation tank is connected with the flocculation reaction tank; the biochemical treatment unit is connected with a supernatant outlet of the primary sedimentation tank; the acid liquor consumption of the acid liquor pool in the embodiment of the invention is greatly reduced compared with the acid liquor consumption for adjusting alkaline or neutral sewage, and the solution after reaction in the acid liquor is added into the flocculation reaction pool to have small influence on the pH of the flocculation reaction pool, so that the acid liquor pool does not need to be added into the flocculation reaction pool, and the acid liquor consumption is reducedAnd the later addition of alkali liquor to adjust the pH reduces the use of acid liquor and alkali liquor, reduces the cost and simplifies the operation.
Description
Technical Field
The embodiment of the invention relates to the technical field of sewage treatment, in particular to an industrial sewage treatment system.
Background
People need to generate a large amount of organic wastewater in the production and living processes, and the organic wastewater which is not effectively treated can cause the receiving water body to be anoxic or even anaerobic after being discharged into the natural water body, so that most of the original aquatic organisms in the receiving water body die, and the water body generates stink, becomes grey water and black water, and deteriorates the water quality and the environment. The intervention of the organic wastewater causes the receiving water body to lose the use value and even influences the normal life of people around. Most of organic wastewater contains toxic and harmful substances to different degrees, and the toxic and harmful substances are continuously enriched by soil, aquatic animals and plants in water and finally enter human bodies to harm human health.
The treatment of high-concentration refractory organic wastewater is a recognized problem in the environmental protection field at home and abroad at present, the high concentration refers to wastewater with COD above 2000mg/l, and the refractory organic wastewater generally refers to BOD5A COD value of 0.3 or less, low biodegradability and difficulty in direct biodegradation. Chemical synthesis, pharmacy, paper making, printing, coal chemical industry, coking, petroleum processing, textile printing and dyeing and food processing industries discharge a large amount of organic wastewater, even alkaline organic wastewater which is difficult to degrade, and the wastewater generally needs to be subjected to pretreatment and then biodegradation. The iron-carbon micro-electrolysis is a widely applied process for treating high-concentration organic wastewater, is suitable for treating high-acidity organic wastewater, can greatly reduce COD (chemical oxygen demand) and chroma, and can greatly improve the biodegradability of the wastewater, a large amount of acid is required to be added into neutral or alkaline organic wastewater to adjust the pH value to 3-4 so that the iron-carbon micro-electrolysis can be normally carried out, and simultaneously, after the electrolytic reaction, in order to ensure that Fe is used2+And Fe3+Generation of Fe (OH) having a strong adsorption ability3The floccule also needs to be added with alkali to adjust the pH value of the effluent to be alkalescent, which not only increases the operation cost, but also increases the inorganic salt in the wastewater. Meanwhile, the operation of directly adding acid into the strongly alkaline wastewater for neutralization has certain danger.
Disclosure of Invention
Therefore, the embodiment of the invention provides an industrial sewage treatment system, which aims to solve the problems of cost increase and inorganic salt increase in water caused by the fact that a large amount of acid is added to adjust the pH value to 3-4 and then alkali is added to adjust the pH value of effluent to be alkalescent in the prior art for treating alkaline or neutral sewage by using iron-carbon micro-electrolysis.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
an industrial wastewater treatment system comprising:
a grid tank;
an acid liquor tank in which is immersed an iron carbon packing layer for generating Fe2+ under acidic conditions;
a flocculation reaction tank connected with the grid tank and receiving Fe generated from the acid liquor tank2+A solution, and an oxygen charging environment and Fe are arranged in the flocculation reaction tank2+Is oxidized into Fe3+Generation of Fe (OH) having a strong adsorption ability3An aeration device for the floccule;
the primary sedimentation tank is connected with the flocculation reaction tank;
and the biochemical treatment unit is connected with the supernatant outlet of the primary sedimentation tank and is used for further purifying the supernatant.
The embodiment of the invention is further characterized in that the aeration device comprises an aeration pipe for oxygenating the flocculation reaction tank and a fixing plate for installing the aeration pipe, the fixing plate is horizontally installed in the middle of the flocculation reaction tank, a threaded hole is formed in the middle of the fixing plate, external threads meshed with the threaded hole are arranged on the periphery of the aeration pipe, the aeration pipe penetrates through the threaded hole, and a waterproof motor for driving the aeration pipe to rotate and lift along the threaded hole is arranged at the top of the aeration pipe.
The embodiment of the invention is further characterized in that the aeration pipe comprises a pipe body penetrating through the threaded hole, aeration rings annularly arranged on the pipe body and positioned at the upper end and the lower end of the fixing plate, and an oxygen supply mechanism for supplying oxygen to the aeration rings, the oxygen supply mechanism comprises an oxygen generator arranged outside the aeration tank, the outlet end of the oxygen generator penetrates through the bottom of the flocculation reaction tank through an oxygen supply pipe and extends into the pipe body, and branch pipes communicated with the aeration rings are arranged on the oxygen supply pipe at positions corresponding to each aeration ring.
The embodiment of the invention is also characterized in that a plurality of aeration heads are uniformly distributed on the periphery of the aeration ring, one end of each aeration head is hinged with the aeration ring in a way of rotating up and down, the other end of each aeration head is provided with an aeration hole, a plurality of branch pipes corresponding to each aeration ring are arranged, and the plurality of branch pipes are communicated with the aeration heads in a one-to-one correspondence way.
The embodiment of the invention is further characterized in that the acid liquor pool is connected with a flushing unit for promoting the reaction of the iron-carbon filler layer, the flushing unit comprises a return pipe, a return pump is arranged on the return pipe, one end of the return pipe is communicated with the lower part of the acid liquor pool, and the other end of the return pipe is communicated with the upper part of the acid liquor pool and extends into the acid liquor pool.
The embodiment of the invention is also characterized in that the return pipe extending into the acid liquor pool is connected with a spiral pipe, the bottom of the spiral pipe is blocked, a plurality of scouring holes are uniformly distributed on the pipe wall of the spiral pipe, and the iron-carbon packing layers are provided with two iron-carbon packing layers and are respectively arranged at the upper end and the lower end of the spiral pipe.
An embodiment of the invention is further characterized in that the return pipe is rotatably connected to the spiral pipe by a bearing.
The embodiment of the invention is also characterized in that the outlet of the acid liquor pool is connected with a liquor discharge pipe, the top of the flocculation reaction pool is provided with a liquor spray head, and the liquor discharge pipe penetrates through the outer wall of the flocculation reaction pool and is connected with the liquor spray head inside the flocculation reaction pool.
The embodiment of the invention has the following advantages:
(1) in the embodiment of the invention, firstly, the Fe2+ is subjected to micro-electrolysis reaction in an acid solution by using the iron carbon filler layer to generate nascent Fe2+And atomic H with high chemical activity capable of changing the structure and characteristics of organic matter in waste water to make the organic matter produce chain breaking, ring opening and other action, and the electrolyzed acid liquid is added into flocculation reaction tank and under the condition of oxygen charging Fe2+Is oxidized into Fe3+Generation of Fe (OH) having a strong adsorption ability3Floc having a higher adsorption capacity than ordinary Fe (OH)3Much stronger, it can dispose ofSuspended matters and some colored substances in water are removed by adsorption and coprecipitation;
(2) in the embodiment of the invention, no sewage is added into the acid liquid pool, so that passivation and hardening of the iron-carbon filler layer can be avoided, the using amount of the acid liquid in the step is greatly reduced compared with that of the acid liquid for adjusting alkaline or neutral sewage, and the solution after reaction in the acid liquid is added into the flocculation reaction pool to have small influence on the pH of the flocculation reaction pool, so that the later addition of alkali liquid for adjusting the pH is not needed, the use of the acid liquid and the alkali liquid is reduced, the cost is reduced, and the operation is simplified.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.
In the figure:
1-a grating pool; 2-acid liquor pool; 3-a flocculation reaction tank; 4-primary settling tank; 5-an aeration device; 6-a biochemical treatment unit;
21-iron carbon filler layer; 22-a return pipe; 23-reflux pump; 24-a spiral pipe; 25-liquid discharge pipe;
31-a liquid jet head;
51-an aerator pipe; 52-a fixed plate; 53-waterproof motor;
511-a tube body; 512-aeration ring; 513 an aeration head; 514-an oxygen generator; 515-oxygen supply tube; 516-branch pipe.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present invention provides an industrial sewage treatment system comprising:
a grid tank 1;
the acid liquid pool 2 is internally immersed with an iron-carbon filler layer 21 which is not used for generating Fe2+ under the acidic condition;
the flocculation reaction tank 3 is connected with the grid tank 1 and receives Fe2+ solution generated by the acid liquid tank 2, and an aeration device 5 which is used for providing an oxygenation environment and oxidizing Fe2+ into Fe3+ to generate Fe (OH)3 floccule with strong adsorption capacity is arranged in the flocculation reaction tank 3;
the primary sedimentation tank 4 is connected with the flocculation reaction tank 3;
and the biochemical treatment unit 6 is connected with the supernatant outlet of the primary sedimentation tank 4 and is used for further purifying the supernatant.
Based on the components of the industrial sewage treatment system, the embodiment of the invention is suitable for the pretreatment of high-concentration organic wastewater, and the specific working principle is as follows: firstly, the grid pool 1 is fed with water to intercept larger pollutants in the sewage, and the iron carbon filler layer 21 is subjected to micro-electrolysis reaction in an acid solution to generate Fe2+ to generate nascent Fe2+And atoms H with high chemical activity, which can change the structure and characteristics of a plurality of organic matters in the wastewater to cause chain scission, ring opening and the like of the organic matters, then the electrolyzed acid solution is added into the flocculation reaction tank 3, the wastewater treated by the grid tank 1 enters the flocculation reaction tank 3 and is oxygenated by an aeration deviceFe in the state2+Is oxidized into Fe3+And Fe (OH) with strong adsorption capacity is generated3Floc having a higher adsorption capacity than ordinary Fe (OH)3The wastewater treatment device is much stronger, suspended matters and some colored substances in the wastewater can be adsorbed, co-precipitated and removed, the flocculated wastewater is precipitated and separated in the primary sedimentation tank 4, and the supernatant enters the biochemical treatment unit 6 for the post-treatment.
In the process, only the electrolyte suitable for the reaction of the iron-carbon filler layer 21 is introduced into the acid liquid pool 2 without adding sewage, wherein the electrolyte can be dilute sulfuric acid or dilute hydrochloric acid, and organic wastewater is not added. Therefore, passivation and hardening of the iron-carbon packing layer 21 can be avoided, the acid liquor using amount in the step is greatly reduced compared with the acid liquor using amount for adjusting alkaline or neutral sewage, and the solution after reaction in the acid liquor tank 2 is added into the flocculation reaction tank 3 to have small influence on the pH value of the flocculation reaction tank 3, so that the later addition of alkali liquor for adjusting the pH value is not needed, the use of the acid liquor and the alkali liquor is reduced, the cost is reduced, and the operation is simplified.
In order to improve the aeration effect of the aeration device 5 and accelerate the reaction speed of the flocculation reaction tank 3, the embodiment of the invention further optimizes the aeration device 5, wherein the aeration device 5 comprises an aeration pipe 51 for oxygenating the flocculation reaction tank 3 and a fixing plate 52 for installing the aeration pipe 51, the fixing plate 52 is horizontally installed in the middle of the flocculation reaction tank 3, a threaded hole is formed in the middle of the fixing plate 52, an external thread meshed with the threaded hole is arranged on the periphery of the aeration pipe 51, the aeration pipe 51 is arranged in the threaded hole in a penetrating manner, and a waterproof motor 53 for driving the aeration pipe 51 to rotate and lift along the threaded hole is arranged at the top of the aeration pipe 51.
The traditional aeration device is generally paved at the bottom of a pool, oxygen is introduced into sewage through aeration holes, the aeration position is fixed, the situation that the oxygen content of the sewage close to one side of the aeration device is more and the oxygen content of the sewage far away from the side is less exists, the aeration pipe 51 in the embodiment of the invention can realize the up-and-down movement of the aeration pipe 51 under the driving of the positive rotation and the negative rotation of the waterproof motor 53, so that the aeration position is changed from the fixed type to the movable type, and the uniformity of the oxygenation of the sewage is improved.
Further, the aeration pipe 51 comprises a pipe body 511 inserted into the threaded hole, aeration rings 512 annularly installed on the pipe body 511 and located at the upper and lower ends of the fixing plate, and an oxygen supply mechanism for supplying oxygen to the aeration rings 512, the oxygen supply mechanism comprises an oxygen generator 514 disposed outside the aeration tank 1, an outlet end of the oxygen generator 514 penetrates through the bottom of the flocculation reaction tank 3 through an oxygen supply pipe 515 and extends to the inside of the pipe body 511, and a branch pipe 516 communicated with the aeration rings 512 is disposed at a position corresponding to each aeration ring 512 of the oxygen supply pipe 515.
When the aeration pipe 51 moves up and down along the fixing plate 52, the aeration pipe 51 also rotates due to the principle of spiral rotation, and sewage is stirred under the driving of rotation, so that the oxygenation effect is further improved, and the Fe content is improved2+Or Fe3+The collision probability with oxygen improves the flocculation effect.
Meanwhile, in order to avoid that flocculated sludge blocks the aeration ports on the aeration rings 512 after the aeration of the aeration rings 512 is stopped, in the embodiment of the invention, a plurality of aeration heads 513 are uniformly distributed on the periphery of the aeration rings 512, one ends of the aeration heads 513 are hinged with the aeration rings 512 in a vertically rotating manner, the other ends of the aeration heads 513 are provided with aeration holes, a plurality of branch pipes 516 corresponding to each aeration ring 512 are arranged, and the plurality of branch pipes 516 are communicated with the aeration heads 513 in a one-to-one correspondence manner.
The aeration ring 512 fills oxygen into sewage through a plurality of aeration heads 513 connected with the aeration ring, due to the hinged design, the aeration heads 513 hang downwards due to the fact that self gravity is larger than buoyancy when the aeration ring stops running, aeration holes face to the bottom, blockage is avoided, and under the condition that the aeration ring 512 rotates, due to the effect of centrifugal force and the effect of self buoyancy, the aeration heads 513 tilt upwards, and the sewage is stirred in a rotating mode while aeration is carried out.
In addition, in order to promote the electrolytic reaction in the acid liquor tank 2, the acid liquor tank 2 is connected with a flushing unit for promoting the reaction of the iron-carbon filler layer 21, the flushing unit comprises a return pipe 22, a return pump 23 is installed on the return pipe 22, one end of the return pipe 22 is communicated with the lower part of the acid liquor tank 2, and the other end of the return pipe 22 is communicated with the upper part of the acid liquor tank 2 and extends into the acid liquor tank 2.
The acid liquid in the acid liquid pool 2 is in a flowing state to continuously wash the iron-carbon filler layer 21 through the design of backflow, so that the Fe content is increased2+The rate of generation of.
Furthermore, the return pipe 22 extending to the interior of the acid liquor pool 2 is connected with a spiral pipe 24, the bottom of the spiral pipe 24 is sealed, a plurality of scouring holes are uniformly distributed on the pipe wall of the spiral pipe 24, and the iron-carbon packing layers 21 are arranged in two and are respectively arranged at the upper end and the lower end of the spiral pipe 24.
The return pipe 22 is rotatably connected with the spiral pipe 24 through a bearing.
Through the design of the bolt pipe 24, when the acid liquor is sprayed back into the acid liquor pool 2 from the flushing hole, the rotation between the spiral pipe 24 and the return pipe 22 is generated due to the influence of unbalanced force, so that the rotary turbulent flow is formed to stir the acid liquor pool 2, and the Fe content is further improved2+The rate of generation of.
Finally, when acid liquor is added into the flocculation reaction tank 3 in the reacted acid liquor tank 2, in order to avoid a large amount of heat release of a large amount of violent acid-base reaction due to one-time large-amount addition, a liquid discharge pipe 25 is connected to an outlet of the acid liquor tank 2, a liquid spray head 31 is arranged at the top of the flocculation reaction tank 3, the liquid discharge pipe 25 penetrates through the outer wall of the flocculation reaction tank 3 and is connected with the liquid spray head 31 inside the flocculation reaction tank, and the acid liquor is uniformly added into the flocculation reaction tank 3 in a small amount through the liquid spray head 31.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
1. An industrial wastewater treatment system, comprising:
a grid pool (1);
an acid liquor tank (2), said acid liquor tank (2) being flooded with acid liquor not used for producing Fe under acidic conditions2+The iron-carbon filler layer (21);
a flocculation reaction tank (3), theThe flocculation reaction tank (3) is connected with the grid tank (1) and receives Fe generated by the acid liquor tank (2)2+Solution, and an oxygen charging environment and Fe are arranged in the flocculation reaction tank (3)2+Is oxidized into Fe3+Generation of Fe (OH) having a strong adsorption ability3An aeration device (5) for the floc;
the primary sedimentation tank (4), the primary sedimentation tank (4) is connected with the flocculation reaction tank (3);
and the biochemical treatment unit (6) is connected with a supernatant outlet of the primary sedimentation tank (4) and is used for further purifying the supernatant.
2. The industrial sewage treatment system according to claim 1, wherein the aeration device (5) comprises an aeration pipe (51) for oxygenating the flocculation reaction tank (3) and a fixing plate (52) for installing the aeration pipe (51), the fixing plate (52) is horizontally installed in the middle of the flocculation reaction tank (3) and a threaded hole is opened in the middle of the fixing plate (52), the circumference of the aeration pipe (51) is provided with an external thread engaged with the threaded hole, the aeration pipe (51) is inserted into the threaded hole, and the top of the aeration pipe (51) is provided with a waterproof motor (53) for driving the aeration pipe (51) to rotate and ascend along the threaded hole.
3. The industrial sewage treatment system according to claim 2, wherein the aeration pipe (51) comprises a pipe body (511) inserted into the threaded hole, aeration rings (512) annularly installed on the pipe body (511) and located at the upper and lower ends of the fixing plate, and an oxygen supply mechanism for supplying oxygen to the aeration rings (512), the oxygen supply mechanism comprises an oxygen generator (514) arranged outside the aeration tank (1), the outlet end of the oxygen generator (514) penetrates through the bottom of the flocculation reaction tank (3) through an oxygen supply pipe (515) and extends into the pipe body (511), and a branch pipe (516) communicated with the aeration rings (512) is arranged at a position corresponding to each aeration ring (512) of the oxygen supply pipe (515).
4. The industrial sewage treatment system according to claim 3, wherein a plurality of aeration heads (513) are uniformly distributed on the periphery of the aeration ring (512), one end of each aeration head (513) is hinged with the aeration ring (512) in a vertically rotatable manner, the other end of each aeration head (513) is provided with an aeration hole, a plurality of branched pipes (516) corresponding to each aeration ring (512) are arranged, and the plurality of branched pipes (516) are communicated with the aeration heads (513) in a one-to-one correspondence manner.
5. The industrial sewage treatment system according to claim 1, wherein the acid liquor pool (2) is connected with a flushing unit for promoting the reaction of the iron-carbon filler layer 21, the flushing unit comprises a return pipe (22), a return pump (23) is installed on the return pipe (22), one end of the return pipe (22) is communicated with the lower part of the acid liquor pool (2), and the other end of the return pipe (22) is communicated with the upper part of the acid liquor pool (2) and extends to the inside of the acid liquor pool (2).
6. The industrial sewage treatment system according to claim 5, wherein a spiral pipe (24) is connected to the return pipe (22) extending to the inside of the acid liquor tank (2), the bottom of the spiral pipe (24) is sealed, a plurality of flushing holes are uniformly distributed on the pipe wall of the spiral pipe (24), and two iron-carbon packing layers (21) are arranged and are respectively installed at the upper end and the lower end of the spiral pipe (24).
7. An industrial sewage treatment system according to claim 6, characterized in that the return pipe (22) is rotatably connected to the spiral pipe (24) by means of a bearing.
8. The industrial sewage treatment system according to claim 1, wherein the outlet of the acid liquor pool (2) is connected with a liquor discharge pipe (25), the top of the flocculation reaction pool (3) is provided with a liquor spray head (31), and the liquor discharge pipe (25) penetrates through the outer wall of the flocculation reaction pool (3) and is connected with the internal liquor spray head (31).
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| CN202010012182.XA CN111039520B (en) | 2020-01-07 | 2020-01-07 | Industrial sewage treatment system |
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| CN202010012182.XA CN111039520B (en) | 2020-01-07 | 2020-01-07 | Industrial sewage treatment system |
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| US5512489A (en) * | 1989-12-04 | 1996-04-30 | Ecossensors Limited | Microelectrodes and amperometric assays |
| CN102515417A (en) * | 2011-11-24 | 2012-06-27 | 浙江新中和羊毛有限公司 | Technology for treating scouring sewage and sludge |
| CN102583910A (en) * | 2012-03-28 | 2012-07-18 | 淄博高汇化工有限公司 | Method for treating waste water in multi-stage catalytic oxidation and microelectrolysis method |
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