Pickling passivation wastewater treatment device

Abstract

The utility model discloses a pickling passivation wastewater treatment device which comprises an adjusting tank, a reaction tank, a sedimentation tank, an anaerobic tank, an aerobic tank and a membrane bioreactor tank which are sequentially arranged adjacently, the bottom surfaces of the adjusting tank, the reaction tank, the sedimentation tank, the anaerobic tank, the aerobic tank and the membrane bioreactor tank are positioned on the same horizontal plane, and chemical agents are placed in the reaction tank. The anaerobic tank and the aerobic tank are both provided with biological combined packing, and a membrane bioreactor is arranged in the membrane bioreactor tank; the pickling passivation wastewater treatment device further comprises an air blower connected with the reaction tank, the aerobic tank and the membrane bioreactor tank; the pickling passivation wastewater treatment device further comprises a middle water tank adjacent to the membrane bioreactor tank, and the middle water tank and the membrane bioreactor tank are sequentially connected with a security filter through a backwashing pump; the pickling passivation wastewater treatment device can be used for treating pickling passivation wastewater, is relatively simple in structure and relatively low in cost, and can meet increasingly strict environmental protection requirements.

Description

TECHNICAL FIELD

[0001] The utility model relates to wastewater treatment technical field especially relates to a pickling passivation wastewater treatment device. BACKGROUND

[0002] In the metal processing and surface treatment industry, pickling passivation is a commonly used process for removing oxides, rust and other impurities from the surface of metals, improving the corrosion resistance and smoothness of metals. However, a large amount of wastewater containing acidic substances, heavy metal ions and organic pollutants is generated in this process. If this wastewater is directly discharged without proper treatment, it will cause serious pollution to the environment and threaten human health and ecological balance. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a pickling passivation wastewater treatment device.

[0004] The utility model adopts the technical scheme to solve its technical problem: a pickling passivation wastewater treatment device is constructed, which includes adjustment pool, reaction pool, sedimentation tank, anaerobic tank, aerobic tank and membrane bioreactor tank arranged in sequence; the bottom surfaces of the adjustment pool, the reaction pool, the sedimentation tank, the anaerobic tank, the aerobic tank and the membrane bioreactor tank are at the same level; chemical reagents are placed in the reaction pool; the anaerobic tank and the aerobic tank are both provided with biological combined fillers; a membrane bioreactor is arranged in the membrane bioreactor tank.

[0005] The pickling passivation wastewater treatment device further includes a blower connected to the reaction pool, the aerobic tank and the membrane bioreactor tank.

[0006] The pickling passivation wastewater treatment device further includes an intermediate water pool arranged adjacent to the membrane bioreactor tank; the membrane bioreactor tank and the intermediate water pool are connected through a water conveying pipeline; a water production pump is arranged on the water conveying pipeline.

[0007] The reaction pool includes first, second, third, fourth, fifth, sixth, seventh and eighth sub-reaction pools arranged in sequence and connected in sequence; the first sub-reaction pool is connected to the adjustment pool through a conveying pipeline; a lifting pump is arranged on the conveying pipeline; the eighth sub-reaction pool is connected to the sedimentation tank; the sedimentation tank, the anaerobic tank, the aerobic tank and the membrane bioreactor tank are connected.

[0008] In some embodiments, the pickling passivation wastewater treatment device further includes a sludge pool arranged adjacent to the intermediate water pool; the sludge pool is connected to the aerobic tank through a sludge pumping pipeline; a sludge pumping pump is arranged on the sludge pumping pipeline.

[0009] In some embodiments, the intermediate water pool and the membrane bioreactor pool are further provided with a backwash pipeline, the backwash pipeline is provided with a backwash pump and a security filter.

[0010] In some embodiments, the pickling and passivation wastewater treatment device further comprises a filter, the filter is connected to the intermediate water pool through a discharge pipeline, the discharge pipeline is provided with a discharge pump.

[0011] In some embodiments, the filter comprises an activated carbon filter, a zeolite filter or a ceramsite filter.

[0012] In some embodiments, the pickling and passivation wastewater treatment device is connected to a sterilizer.

[0013] In some embodiments, the sterilizer comprises at least one of an ultraviolet sterilizer, a chlorination sterilizer or an ozone sterilizer.

[0014] In some embodiments, the pool wall between the first sub-reaction pool and the second sub-reaction pool is provided with a first overflow hole; the pool wall between the second sub-reaction pool and the third sub-reaction pool is provided with a second overflow hole; the pool wall between the third sub-reaction pool and the fourth sub-reaction pool is provided with a third overflow hole; the pool wall between the fourth sub-reaction pool and the fifth sub-reaction pool is provided with a fourth overflow hole; the pool wall between the fifth sub-reaction pool and the sixth sub-reaction pool is provided with a fifth overflow hole; the pool wall between the sixth sub-reaction pool and the seventh sub-reaction pool is provided with a sixth overflow hole; the pool wall between the seventh sub-reaction pool and the eighth sub-reaction pool is provided with a seventh overflow hole; the pool wall between the eighth sub-reaction pool and the sedimentation pool is provided with an eighth overflow hole; the pool wall between the sedimentation pool and the anaerobic pool is provided with a ninth overflow hole; the pool wall between the anaerobic pool and the aerobic pool is provided with a tenth overflow hole; the pool wall between the aerobic pool and the membrane bioreactor is provided with an eleventh overflow hole.

[0015] The first overflow hole, the third overflow hole, the fifth overflow hole, the seventh overflow hole, the ninth overflow hole and the eleventh overflow hole are at the same first height position; the second overflow hole, the fourth overflow hole, the sixth overflow hole, the eighth overflow hole and the tenth overflow hole are at the same second height position, which is above the first height position.

[0016] In some embodiments, the first overflow hole, the second overflow hole, the third overflow hole, the fourth overflow hole, the fifth overflow hole, the sixth overflow hole, the seventh overflow hole, the eighth overflow hole, the ninth overflow hole, the tenth overflow hole and the eleventh overflow hole are all square holes, the square holes have a planar size of 100mm in length and 100mm in width.

[0017] In some embodiments, the reaction cell comprises at least one of a Fenton oxidation reaction cell, an ozone oxidation reaction cell, or a photocatalytic oxidation reaction cell.

[0018] The pickling and passivation wastewater treatment device can treat pickling and passivation wastewater, has a relatively simple structure, low cost, and can meet increasingly stringent environmental protection requirements. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the present application, the present application will be further described below in conjunction with the drawings and examples. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor. In the drawings:

[0020] Figure 1 is a structural schematic diagram of the pickling and passivation wastewater treatment device in some embodiments of the present application;

[0021] Figure 2 is a schematic diagram of the filter and sterilizer in some embodiments of the present application. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the technical scheme of the present application, the present application will be further described below in conjunction with the drawings and examples. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor. In the drawings:

[0023] It also needs to be explained that unless there is an explicit provision and limitation, the terms "installation", "connection", "connection", "fixation", "arrangement" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "below" another element, the element can be "directly" or "indirectly" above another element, or there can be one or more intervening elements. The terms "first", "second", "third" and the like are only for the convenience of describing the technical solutions, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features with "first", "second", "third" and the like can be explicitly or implicitly include one or more features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] In the following description, specific details are set forth in order to provide a thorough understanding of the embodiments of the present application, but not for the purpose of limiting. It should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits and methods are omitted to avoid unnecessary details that hinder the description of the present application.

[0025] Referring to Figure 1 and Figure 2 The present application shows a kind of pickling passivation wastewater treatment device, including the adjusting pool 10, reaction pool 20, sedimentation tank 30, anaerobic tank 40, aerobic tank 50 and membrane biological reactor pool 60 being sequentially adjacent, the bottom of the adjusting pool 10, the reaction pool 20, the sedimentation tank 30, the anaerobic tank 40, the aerobic tank 50 and the membrane biological reactor pool 60 are at the same level. Sedimentation tank 30, anaerobic tank 40, aerobic tank 50 and membrane biological reactor pool 60 are communicated.

[0026] The reaction tank 20 is provided with a chemical agent, which can be one or more of sodium hydroxide, ferrous sulfate, dichlorine water, sulfuric acid, sodium hypochlorite, sodium thiosulfate, polyacrylamide, and polyaluminum chloride, but is not limited thereto. The reaction tank 20 includes at least one of a Fenton oxidation reaction tank, an ozone oxidation reaction tank, or a photocatalytic oxidation reaction tank. Preferably, the reaction tank 20 is a Fenton oxidation reaction tank, which uses Fe(II) and H2O2 to promote the Fenton reaction to efficiently generate hydroxyl radicals (·OH) and deeply oxidize refractory organic matter in wastewater, thereby improving the biodegradability of the wastewater. After 60 minutes of Fenton reaction in the Fenton oxidation reaction tank, the COD removal rate of the sewage wastewater reaches 40%. The COD (Chemical Oxygen Demand) is the amount of reducing substances that need to be oxidized in the water sample measured by a chemical method. In wastewater, effluent from a wastewater treatment plant, and contaminated water, the oxygen equivalent of substances (usually organic matter) that can be oxidized by a strong oxidizing agent is an important and quickly measurable parameter of organic pollution. Of course, the reaction tank 20 can also be an ozone oxidation reaction tank or a photocatalytic oxidation reaction tank, which can be selected according to the composition of the wastewater and the treatment cost, and is not limited herein.

[0027] The sedimentation tank 30 can be a inclined tube sedimentation tank, which can increase the sedimentation area and shorten the water flow path through the inclined tube structure, effectively improve the removal efficiency of suspended solids, and reduce the subsequent treatment burden.

[0028] The anaerobic tank 40 and the aerobic tank 50 are both provided with biological combined fillers. The biological combined fillers in the anaerobic tank 40 are attached with anaerobic bacteria, and the biological combined fillers in the aerobic tank 50 are attached with aerobic bacteria. The biological combined fillers can use the existing biological combined fillers, which are not limited herein. The anaerobic tank 40 and the aerobic tank 50 can construct an A / O biological treatment system, which utilizes the fermentation of anaerobic microorganisms and the nitrification-denitrification of aerobic microorganisms to achieve efficient degradation of organic matter and biological removal of nitrogen and phosphorus and other nutrients. Of course, in some embodiments, sequencing batch activated sludge (SBR), biological treatment technology such as biological rotating disc, etc. can be selected according to the wastewater treatment scale and operation management requirements, which are not limited herein.

[0029] The membrane bioreactor tank 60 is provided with a membrane bioreactor. The wastewater enters the membrane bioreactor. The membrane bioreactor has a membrane pore size of 0.01 μm. The COD (Chemical Oxygen Demand) concentration of the effluent can be reduced to below 50 mg / L, and the SS (Suspended Solids) is almost completely removed. The COD refers to the amount of reducing substances that need to be oxidized in the water sample measured by chemical methods. In wastewater, effluent from wastewater treatment plants, and contaminated water, the oxygen equivalent of substances (usually organic matter) that can be oxidized by a strong oxidizing agent is an important and quickly measurable parameter of organic pollution. SS refers to solid substances suspended in water, including inorganic substances, organic substances, and mud, clay, microorganisms, etc. that are insoluble in water. The suspended solids content in water is one of the indicators for measuring water pollution. Understandably, the membrane bioreactor tank 60 can use high-performance membrane materials, combining biological treatment and membrane separation technology, to achieve efficient purification and reuse of wastewater, while reducing sludge production and improving the stability of the pickling and passivation wastewater treatment device.

[0030] The pickling and passivation wastewater treatment device also includes a blower 100 connected to the reaction tank 20, the aerobic tank 50, and the membrane bioreactor tank 60. Preferably, the reaction tank 20, the aerobic tank 50, and the membrane bioreactor tank 60 are each provided with a blowing line (or gas blowing line), and the blower 100 is connected to the blowing line to fill the reaction tank 20, the aerobic tank 50, and the membrane bioreactor tank 60 with gas for wastewater stirring.

[0031] The pickling and passivation wastewater treatment device also includes an intermediate water tank 70 arranged adjacent to the membrane bioreactor tank 60. The membrane bioreactor tank 60 and the intermediate water tank 70 are connected by a water delivery pipeline 71. The water delivery pipeline 71 is provided with a water production pump 72. The treated water from the membrane bioreactor tank 60 enters the intermediate water tank 70 through the water delivery pipeline 71 and the water production pump 71. Further, the intermediate water tank 70 and the membrane bioreactor tank 60 are also provided with a backwashing pipeline. The backwashing pipeline is provided with a backwashing pump 110 and a safety filter 120 for backwashing water operation. The membrane bioreactor tank 60 backwashing water flow is: intermediate water tank 70-backwashing pump 110-safety filter 120-membrane bioreactor tank 60. The safety filter 120, also known as a precision filter, is a filtering device used in water treatment systems. The safety filter 120 can use shaped filter materials such as filter cloth, filter screen, filter sheet, etc. Under pressure, the raw liquid passes through the filter material, and the filter residue remains on the pipe wall, and the filtrate flows out through the filter material. The safety filter 120 can remove fine particles with a turbidity of 1 degree or more, meeting the requirements of the subsequent process for the influent.

[0032] The pickling and passivation wastewater treatment device also includes an emergency pool 90 located adjacent to the equalization pool 10, which can be used to store wastewater or other substances in an emergency.

[0033] In some embodiments, the pickling and passivation wastewater treatment device further includes a sludge tank 80 adjacent to the intermediate water tank 70. The sludge tank 80 is connected to the aerobic tank 50 via a sludge pumping pipe 81, which is equipped with a sludge pump 82. The sludge pump 82 pumps the sludge from the intermediate water tank 70 to the sludge tank 80. Further, the pickling and passivation wastewater treatment device may also include a sludge pressing pump and a plate and frame filter press connected to each other. The sludge pressing pump pumps the sludge from the sludge tank to the plate and frame filter press, where the sludge is concentrated in the sludge tank 80. The concentrated sludge enters the plate and frame filter press, where it is pressed. The resulting sludge cake is packaged and transported off-site, and the filtrate can be returned to the equalization tank 10 for reprocessing via a pipeline. Both the sludge pump 82 and the sludge pressing pump can be pneumatic diaphragm pumps.

[0034] like Figure 1 As shown, the plan view of the entire pickling and passivation wastewater treatment device can be roughly rectangular in structure. The equalization tank 10, sedimentation tank 30, membrane bioreactor tank 60 and intermediate water tank 70 are spaced apart along the length of the pickling and passivation wastewater treatment device and are arranged in a roughly first column. The emergency tank 90, anaerobic tank 40, aerobic tank 50 and sludge tank 80 are spaced apart along the length of the pickling and passivation wastewater treatment device and are arranged in a roughly second column. The reaction tank 20 is horizontally arranged between the equalization tank 10 and the sedimentation tank 30, and is also horizontally arranged between the emergency tank 90 and the anaerobic tank 40, making the entire pickling and passivation wastewater treatment device structure more compact.

[0035] like Figure 2 As shown, in some embodiments, the pickling and passivation wastewater treatment device further includes a filter 150, which is connected to the intermediate water tank 70 via a discharge pipe 160, and a discharge pump 170 is installed on the discharge pipe 160. The filter 150 includes an activated carbon filter, a zeolite filter, or a ceramic granule filter. Preferably, the filter 150 is an activated carbon filter, using coconut shell activated carbon, with a filtration speed of 10 m / h, resulting in significant improvement in effluent color and odor. Understandably, by utilizing the high specific surface area and adsorption performance of activated carbon, residual organic matter, color, and odor in the wastewater can be effectively removed, improving the effluent quality.

[0036] like Figure 2 As shown, in some embodiments, the pickling and passivation wastewater treatment device is connected to a sterilizer 180 via the filter 150. The sterilizer 180 includes at least one of an ultraviolet sterilizer, a chlorination sterilizer, or an ozone sterilizer. Preferably, the sterilizer 180 is an ultraviolet sterilizer with an ultraviolet dose of 10 mJ / cm². 2The water outlet pathogenic microorganism is completely inactivated, and the water outlet safety is ensured.

[0037] In some embodiments, the pickling and passivation wastewater treatment device can further comprise a discharge cylinder connected with the water outlet of the sterilizer 180.

[0038] In some embodiments, the reaction tank 20 comprises a first sub-reaction tank 21, a second sub-reaction tank 22, a third sub-reaction tank 23, a fourth sub-reaction tank 24, a fifth sub-reaction tank 25, a sixth sub-reaction tank 26, a seventh sub-reaction tank 27, and an eighth sub-reaction tank 28 arranged in sequence. The first sub-reaction tank 21, the second sub-reaction tank 22, the third sub-reaction tank 23, and the fourth sub-reaction tank 24 are arranged in a first row, and the fifth sub-reaction tank 25, the sixth sub-reaction tank 26, the seventh sub-reaction tank 27, and the eighth sub-reaction tank 28 are arranged in a second row. The first sub-reaction tank 21 is arranged adjacent to the eighth sub-reaction tank 28, the second sub-reaction tank 22 is arranged adjacent to the seventh sub-reaction tank 27, the third sub-reaction tank 23 is arranged adjacent to the sixth sub-reaction tank 26, and the fourth sub-reaction tank 24 is arranged adjacent to the fifth sub-reaction tank 25.

[0039] The first sub-reaction tank 21 is arranged in communication with the conditioning tank 10 through a conveying pipeline 130, and a lifting pump 140 is arranged on the conveying pipeline 130. The eighth sub-reaction tank 28 is arranged in communication with the sedimentation tank 30. The sedimentation tank 30, the anaerobic tank 40, the aerobic tank 50, and the membrane bioreactor tank 60 are arranged in communication. The lifting pump 140 can be a centrifugal pump.

[0040] The sewage wastewater in the reaction tank 20 flows through the first sub-reaction tank 21, the second sub-reaction tank 22, the third sub-reaction tank 23, the fourth sub-reaction tank 24, the fifth sub-reaction tank 25, the sixth sub-reaction tank 26, the seventh sub-reaction tank 27, and the eighth sub-reaction tank 28 in sequence, so that the sewage wastewater has sufficient residence time for reaction.

[0041] The pool wall between the first sub-reaction pool 21 and the second sub-reaction pool 22 can be provided with a first overflow hole A; the pool wall between the second sub-reaction pool 22 and the third sub-reaction pool 23 is provided with a second overflow hole B; the pool wall between the third sub-reaction pool 23 and the fourth sub-reaction pool 24 is provided with a third overflow hole C; the pool wall between the fourth sub-reaction pool 24 and the fifth sub-reaction pool 25 is provided with a fourth overflow hole D; the pool wall between the fifth sub-reaction pool 25 and the sixth sub-reaction pool 26 is provided with a fifth overflow hole E; the pool wall between the sixth sub-reaction pool 26 and the seventh sub-reaction pool 27 is provided with a sixth overflow hole F; the pool wall between the seventh sub-reaction pool 27 and the eighth sub-reaction pool 28 is provided with a seventh overflow hole G; the pool wall between the eighth sub-reaction pool 28 and the sedimentation tank 30 is provided with an eighth overflow hole H; the pool wall between the sedimentation tank 30 and the anaerobic tank 40 is provided with a ninth overflow hole I, and the pool wall between the anaerobic tank 40 and the aerobic tank 50 is provided with a tenth overflow hole J; the pool wall between the aerobic tank 50 and the membrane bioreactor is provided with an eleventh overflow hole K.

[0042] The first overflow hole A, the third overflow hole C, the fifth overflow hole E, the seventh overflow hole G, the ninth overflow hole I, and the eleventh overflow hole K are at the same first height position; the second overflow hole B, the fourth overflow hole D, the sixth overflow hole F, the eighth overflow hole H, and the tenth overflow hole J are at the same second height position, which is above the first height position, and the second height position can be about 0.5 meters above the first height position.

[0043] The pickling and passivation wastewater treatment device can be arranged on a mounting base, and the first overflow hole A, the third overflow hole C, the fifth overflow hole E, the seventh overflow hole G, the ninth overflow hole I, and the eleventh overflow hole K are at a position 1.5 meters above the reference surface, and the second overflow hole B, the fourth overflow hole D, the sixth overflow hole F, the eighth overflow hole H, and the tenth overflow hole J are at a position 2 meters above the reference surface.

[0044] In some embodiments, the first overflow hole A, the second overflow hole B, the third overflow hole C, the fourth overflow hole D, the fifth overflow hole E, the sixth overflow hole F, the seventh overflow hole G, the eighth overflow hole H, the ninth overflow hole I, the tenth overflow hole J, and the eleventh overflow hole K are all square holes, and the planar size of the square hole is 100 mm long and 100 mm wide.

[0045] The acid pickling and passivation wastewater treatment device is applied as follows: the wastewater first enters the adjusting tank 10, is homogenized and homogeneously distributed in the adjusting tank 10, the adjusting tank 10 is connected with the lifting pump 140 through the conveying pipeline 130, and the wastewater is quantitatively lifted to the reaction tank 20, the chemical agent in the reaction tank 20 fully reacts with the pollutants in the wastewater, the wastewater is decolorized, the content of COD is reduced, and the biodegradability is improved. Then, the mud-water separation is performed in the sedimentation tank 30, the supernatant in the sedimentation tank 30 flows into the anaerobic tank 40. The sludge in the sedimentation tank 30 is concentrated and then pumped into the sludge tank through the pneumatic diaphragm pump, the biological combined filler is installed in the anaerobic tank 40 and used for attaching anaerobic bacteria, under the action of the anaerobic bacteria, the COD in the water is decomposed, then the wastewater enters the aerobic tank 50, the biological combined filler is installed in the aerobic tank 50, the contact oxidation process can be used as the treatment process of the aerobic tank 50, the pollutants in the water are degraded again in the aerobic tank 50, then the wastewater flows into the membrane bioreactor tank 60, the membrane bioreactor in the membrane bioreactor tank 60 intercepts the activated sludge and the macromolecular organic matter in the reaction tank 20, greatly improves the concentration of the activated sludge, and the refractory substance is continuously reacted and degraded in the membrane bioreactor tank 60. Subsequently, the effluent of the membrane bioreactor tank 60 flows into the intermediate tank 70 through the backwashing pump 110 and the security filter 120, and then is pumped to the filter 150 through the discharge pump 170, and after being filtered through the filter 150, is disinfected through the sterilizer 180 and then discharged up to the standard.

[0046] The sludge generated by the membrane bioreactor tank 60 is lifted and backflowed to the reaction tank 20 by the sludge backflow pump or is discharged to the sludge tank 80 by the sludge pumping pump 82, the sludge in the sludge tank 80 is concentrated, the concentrated sludge enters the plate-and-frame filter press, the sludge cake is packaged and transported out after being pressed by the plate-and-frame filter press, and the filtrate can be backflowed to the adjusting tank 10 for reprocessing through the pipeline.

[0047] Understandably, the acid pickling and passivation wastewater treatment device integrates Fenton oxidation, inclined tube sedimentation, anaerobic and aerobic biological treatment, membrane bioreactor, activated carbon filtration and ultraviolet disinfection, and realizes the whole-chain treatment of wastewater from physical and chemical reaction to biological treatment and then to deep purification.

[0048] The acid pickling and passivation wastewater treatment device can treat acid pickling and passivation wastewater, has a relatively simple structure, low cost, is conducive to production promotion, and can meet the increasingly strict environmental protection requirements.

[0049] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0050] It can be understood that the above embodiments only express the preferred embodiments of the present application, which are described in detail and in detail, but cannot be understood as a limitation on the scope of the patent of the present application; It should be pointed out that for those skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and a number of modifications and improvements can be made, which belong to the protection scope of the present application; Therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.

Claims

1. A pickling and passivation wastewater treatment device, characterized in that, The system includes an equalization tank (10), a reaction tank (20), a sedimentation tank (30), an anaerobic tank (40), an aerobic tank (50), and a membrane bioreactor tank (60) arranged sequentially and adjacently. The bottom surfaces of the equalization tank (10), the reaction tank (20), the sedimentation tank (30), the anaerobic tank (40), the aerobic tank (50), and the membrane bioreactor tank (60) are on the same horizontal plane. The reaction tank (20) contains chemical agents. The anaerobic tank (40) and the aerobic tank (50) are equipped with biological composite packing materials. The membrane bioreactor tank (60) contains a membrane bioreactor. The pickling and passivation wastewater treatment device also includes a blower (100) connected to the reaction tank (20), the aerobic tank (50) and the membrane bioreactor tank (60); The pickling and passivation wastewater treatment device also includes an intermediate water tank (70) adjacent to the membrane bioreactor tank (60). The membrane bioreactor tank (60) and the intermediate water tank (70) are connected by a water supply pipe (71), and a product water pump (72) is provided on the water supply pipe (71). The reaction tank (20) includes a first sub-reaction tank (21), a second sub-reaction tank (22), a third sub-reaction tank (23), a fourth sub-reaction tank (24), a fifth sub-reaction tank (25), a sixth sub-reaction tank (26), a seventh sub-reaction tank (27), and an eighth sub-reaction tank (28) connected in sequence. The first sub-reaction tank (21) is connected to the regulating tank (10) through a conveying pipe (130), and a booster pump (140) is provided on the conveying pipe (130). The eighth sub-reaction tank (28) is connected to the sedimentation tank (30). The sedimentation tank (30), the anaerobic tank (40), the aerobic tank (50), and the membrane bioreactor tank (60) are connected in sequence.

2. The pickling and passivation wastewater treatment device according to claim 1, characterized in that, The pickling and passivation wastewater treatment device also includes a sludge tank (80) adjacent to the intermediate water tank (70); the sludge tank (80) and the aerobic tank (50) are connected by a sludge pumping pipe (81), and a sludge pumping pump (82) is provided on the sludge pumping pipe (81).

3. The pickling and passivation wastewater treatment device according to claim 1, characterized in that, The intermediate water tank (70) and the membrane bioreactor tank (60) are also provided with backwashing pipes, and the backwashing pipes are equipped with a backwashing pump (110) and a security filter (120).

4. The pickling and passivation wastewater treatment device according to claim 1, characterized in that, The pickling and passivation wastewater treatment device also includes a filter (150), which is connected to the intermediate water tank (70) through a discharge pipe (160), and a discharge pump (170) is provided on the discharge pipe (160).

5. The pickling and passivation wastewater treatment device according to claim 4, characterized in that, The filter (150) includes an activated carbon filter, a zeolite filter, or a ceramic filter.

6. The pickling and passivation wastewater treatment device according to claim 4, characterized in that, The pickling and passivation wastewater treatment device is connected to the sterilizer (180) of the filter (150).

7. The pickling and passivation wastewater treatment device according to claim 6, characterized in that, The sterilizer (180) includes at least one of an ultraviolet sterilizer, a chlorine sterilizer, or an ozone sterilizer.

8. The pickling and passivation wastewater treatment device according to claim 1, characterized in that, The first sub-reaction tank (21) and the second sub-reaction tank (22) are provided with a first flow hole (A); the second sub-reaction tank (22) and the third sub-reaction tank (23) are provided with a second flow hole (B); the third sub-reaction tank (23) and the fourth sub-reaction tank (24) are provided with a third flow hole (C); the fourth sub-reaction tank (24) and the fifth sub-reaction tank (25) are provided with a fourth flow hole (D); the fifth sub-reaction tank (25) and the sixth sub-reaction tank (26) are provided with a fifth flow hole (E); the sixth sub-reaction tank... The pool wall between pool (26) and the seventh sub-reaction pool (27) is provided with a sixth flow hole (F); the pool wall between the seventh sub-reaction pool (27) and the eighth sub-reaction pool (28) is provided with a seventh flow hole (G); the pool wall between the eighth sub-reaction pool (28) and the sedimentation pool (30) is provided with an eighth flow hole (H); the pool wall between the sedimentation pool (30) and the anaerobic pool (40) is provided with a ninth flow hole (I); the pool wall between the anaerobic pool (40) and the aerobic pool (50) is provided with a tenth flow hole (J); the aerobic pool (50) and the membrane bioreactor are provided with an eleventh flow hole (K); The first flow passage (A), the third flow passage (C), the fifth flow passage (E), the seventh flow passage (G), the ninth flow passage (I), and the eleventh flow passage (K) are at the same first height position; the second flow passage (B), the fourth flow passage (D), the sixth flow passage (F), the eighth flow passage (H), and the tenth flow passage (J) are at the same second height position, which is located above the first height position.

9. The pickling and passivation wastewater treatment device according to claim 8, characterized in that, The first flow passage (A), the second flow passage (B), the third flow passage (C), the fourth flow passage (D), the fifth flow passage (E), the sixth flow passage (F), the seventh flow passage (G), the eighth flow passage (H), the ninth flow passage (I), the tenth flow passage (J), and the eleventh flow passage (K) are all square holes, and the planar dimensions of the square holes are 100mm in length and 100mm in width.

10. The pickling and passivation wastewater treatment device according to claim 1, characterized in that, The reaction tank (20) includes at least one of a Fenton oxidation reaction tank, an ozone oxidation reaction tank, or a photocatalytic oxidation reaction tank.

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