A hydrolysis acidification tank for high COD sewage treatment and treatment method thereof

Abstract

The present invention proposes a hydrolysis acidification tank for high COD sewage treatment and a treatment method thereof, comprising a hydrolysis acidification tank body, a partition plate, a filter box, a first filter screen, a baffle and a sewage collecting assembly, wherein the hydrolysis acidification tank body is used to hydrolyze acidified sewage, and the partition plate is arranged inside the hydrolysis acidification tank body. The sludge is filtered by a first filter screen arranged on one side of the filter box. During the hydrolysis acidification treatment, the upper hydrolysis chamber always contains only a small amount of sludge. The sewage in the upper hydrolysis chamber carries a small amount of sludge and flows into the interior of the filter box and is filtered, which can prevent the sludge from blocking the flow channel during the flow into the filter box. When the interior of the lower hydrolysis chamber is deeply hydrolyzed and acidified, the sludge generation rate is significantly reduced, so that the hydrolysis acidification tank of the present application can perform hydrolysis acidification for a long time, and the sludge generated during the hydrolysis acidification process does not need to be cleaned separately, thereby increasing the hydrolysis acidification efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a hydrolysis acidification tank for high COD sewage treatment and a treatment method thereof. Background Art

[0002] High COD wastewater refers to wastewater in which potassium dichromate requires a high amount of oxygen to oxidize organic matter in one liter of wastewater under strong acidic conditions. Due to the high COD concentration, this wastewater has high pollution and low biodegradability. In the treatment of high COD wastewater, the hydrolysis acidification tank is a commonly used treatment unit. The hydrolysis acidification tank decomposes organic matter into soluble organic acids and other intermediates through bacterial hydrolysis and acidification. The hydrolysis acidification tank helps to remove organic pollutants more easily in the subsequent biochemical treatment stage and improve the biodegradability of wastewater.

[0003] When sewage is treated through a hydrolysis acidification tank, two actions are involved: hydrolysis and acidification. Hydrolysis is the process by which organic waste is broken down into smaller molecules by bacteria. The bacteria in the hydrolysis acidification tank break down large molecular organic matter into soluble organic acids through hydrolysis. The produced organic acids can be further acidified by bacteria to form simpler compounds. This process helps to adjust the pH value of the water body and provide more favorable conditions for subsequent biochemical treatment.

[0004] In the existing hydrolysis acidification tank, stirring devices and aeration devices are usually provided, and the sewage is hydrolyzed and acidified by stirring and aeration. However, when the sewage is treated by hydrolysis acidification, a large amount of sludge may be generated in the hydrolysis acidification tank, including hydrolysis and acidification products and bacterial organisms. The high sludge production may cause system blockage and further operation problems. When cleaning the sludge during the hydrolysis acidification process, not only does it take too much time and energy to clean it, but it also reduces the hydrolysis acidification treatment efficiency. Therefore, a hydrolysis acidification tank for high COD sewage treatment and a treatment method thereof are proposed to solve the above problems. Summary of the invention

[0005] In view of this, the present invention proposes a hydrolysis acidification tank for high COD sewage treatment and a treatment method thereof, wherein sludge is filtered by a first filter screen arranged on one side of a filter box, and during the hydrolysis acidification treatment, the upper hydrolysis chamber always contains only a small amount of sludge, and the sewage in the upper hydrolysis chamber carries a small amount of sludge into the interior of the filter box and is filtered, which can prevent the sludge from blocking the flow channel during the flow into the filter box. Due to the formation of a circulating water flow under the action of a pumping mechanism, the sludge can be filtered once by the first filter screen each time the sewage passes through the filter box, so that when the sewage is deeply hydrolyzed and acidified in the lower hydrolysis chamber, the sludge generation rate is significantly reduced, so that the hydrolysis acidification tank of the present application can perform hydrolysis acidification for a longer time, and there is no need to separately clean the generated sludge during the hydrolysis acidification process, thereby increasing the hydrolysis acidification efficiency.

[0006] The technical solution of the present invention is implemented as follows: The present invention provides a hydrolysis acidification tank for high COD sewage treatment, characterized in that it includes a hydrolysis acidification tank body, a partition plate, a filter box, a first filter screen, a baffle, a sewage collection component and a pumping mechanism, wherein:

[0007] The hydrolysis and acidification tank body is used to hydrolyze acidified sewage, and the isolation plate is arranged inside the hydrolysis and acidification tank body, and divides the hydrolysis and acidification tank body into an upper hydrolysis chamber, a middle sewage filtering chamber and a lower hydrolysis chamber;

[0008] A filter box is arranged inside the middle filter chamber, and the first filter screen is arranged on one side of the filter box, the filter box forms a flow channel for sewage to flow, and the first filter screen covers the flow channel for filtering sludge;

[0009] A sewage collection component is arranged inside the lower hydrolysis chamber, and a sewage drop hole connected to the sewage collection component and the flow channel is opened on the isolation plate, and the baffle is an inclined plate, which is arranged inside the filter box and extends through the sewage drop hole to the inner side of the sewage collection component, and the baffle is sealed and fitted with the filter box and the sewage drop hole;

[0010] The pumping mechanism is used to pump out the water in the lower hydrolysis chamber and supply it to the upper hydrolysis chamber.

[0011] On the basis of the above technical solution, preferably, it also includes a plurality of agitators, aeration pipes, water supply pipes and pumping mechanisms, wherein:

[0012] The upper hydrolysis chamber and the middle sewage filter chamber are separated from each other, and the middle sewage filter chamber and the lower hydrolysis chamber are connected to each other;

[0013] The plurality of agitators are respectively arranged inside the upper hydrolysis chamber and the lower hydrolysis chamber for agitating sewage, and the aeration pipe extends to the inside of the upper hydrolysis chamber and the lower hydrolysis chamber for aeration, and the water supply pipe is connected with the upper hydrolysis chamber and the flow channel.

[0014] On the basis of the above technical solution, preferably, the sewage collection assembly includes a bottom assembly box, a sewage storage box, a lock and a drainage pipeline, wherein:

[0015] A bottom assembly box is fixedly connected to the isolation plate, and an assembly through hole communicating with the bottom assembly box is provided on one side of the hydrolysis acidification tank body;

[0016] A dirt storage box passes through the assembly through hole and is slidably connected to the bottom assembly box. The dirt storage box is sealed and fitted with the assembly through hole, and the side wall of the dirt storage box is a water filter screen wall;

[0017] A lock buckle, arranged on the outside of the hydrolysis acidification tank body, used to locate the sliding position of the sewage storage box;

[0018] The drainage pipeline is connected to the sewage storage tank and is used for discharging the sewage in the sewage storage tank.

[0019] On the basis of the above technical solution, preferably, it further includes a driving mechanism and an upper scraper, wherein:

[0020] The side wall of the first filter screen is aligned with the inner wall of the filter box in the height direction;

[0021] The upper scraper is located inside the filter box and is sealed with the box wall of the filter box. The upper scraper is provided with a first water filtering hole;

[0022] The driving mechanism is used for driving the upper scraper to slide towards or away from the dirt collecting hole.

[0023] On the basis of the above technical solution, preferably, the driving mechanism includes a top assembly box, a sliding ring, a sliding rod, a transfer ring and a motor, wherein:

[0024] A top assembly box is arranged inside the upper hydrolysis chamber;

[0025] The sliding ring is a square ring, which is slidably arranged on the inner side of the top assembly box and is fixedly connected to the upper scraper through a coupling shaft;

[0026] A sliding rod, slidably arranged on one side of the sliding ring;

[0027] An adapter ring, rotatably arranged on the peripheral side of the sliding rod;

[0028] The motor is arranged inside the top assembly box and is fixedly connected to the adapter ring through a crankshaft.

[0029] On the basis of the above technical solution, preferably, it also includes a lower scraper and an adjustment component, wherein:

[0030] The lower scraper is rotatably arranged relative to the upper scraper and is positioned opposite to the baffle in the vertical direction. The baffle is an inclined arc-shaped plate, and the end of the lower scraper is in contact with the wall of the filter box.

[0031] The adjusting assembly is used for regulating the rotation of the lower scraper.

[0032] On the basis of the above technical solution, preferably, it further includes a first return spring, and the adjustment assembly includes an adjustment rod, an adjustment plate, an outer plate, a pressure piece and a second return spring, wherein,

[0033] The lower scraper includes a connecting portion, a scraping portion and a regulating portion, wherein the connecting portion is a column, the scraping portion and the regulating portion are both plates, and are fixedly connected to the connecting portion and extend to opposite sides of the connecting portion respectively, and an end of the scraping portion away from the connecting portion contacts the wall of the filter box;

[0034] a first return spring, disposed between the lower scraper plate and the upper scraper plate, and used for returning the rotation position of the lower scraper plate;

[0035] An adjusting rod, which passes through the isolation plate and extends to the inside of the filter box and the top assembly box respectively;

[0036] An adjustment plate, disposed at one end of the adjustment rod and extending into a gap formed between the adjustment portion and the connection portion;

[0037] An outer plate, rotatably disposed on an end of the adjusting rod away from the adjusting plate;

[0038] A pressing member is arranged inside the top assembly box, and the pressing member includes a contact wall, the contact wall is an inclined wall, and the contact wall is opposite to the outer plate in the height direction, the distance between the end of the outer plate and the contact wall in the height direction is a, the distance between the end of the scraping part and the baffle in the height direction is b, and the relationship between a and b is: a=b;

[0039] A second return spring is arranged between the outer plate and the adjusting rod and is used for returning the rotation position of the outer plate.

[0040] On the basis of the above technical solution, preferably, it also includes an internal box, wherein:

[0041] The inner assembly box is arranged inside the top assembly box, the adjustment rod passes through and extends into the inner assembly box, the pressing piece is arranged on the inner side of the inner assembly box, and the sliding ring is arranged on the outer side of the inner assembly box and is slidably connected with the inner assembly box.

[0042] On the basis of the above technical solution, preferably, it further includes a first connecting member and a first connecting rod, and the adjustment assembly also includes a second connecting member and a second connecting rod, wherein:

[0043] A first connecting member is arranged at the bottom of the upper scraper, and the lower scraper is rotatably connected to the first connecting member;

[0044] a first connecting rod, fixedly connected to the first connecting member and penetrating the lower scraper plate; the first return spring is sleeved on the circumference of the first connecting member and fixedly connected to the lower scraper plate and the first connecting member;

[0045] A second connecting member is provided at an end of the adjusting rod away from the adjusting plate, and the outer plate is rotatably connected to the second connecting member;

[0046] The second connecting rod is fixedly connected to the second connecting member and passes through the outer plate. The second return spring is sleeved on the circumference of the second connecting rod and is fixedly connected to the second connecting member and the outer plate.

[0047] The present invention also proposes a method for treating high COD wastewater using a hydrolysis acidification tank, comprising the above-mentioned high COD wastewater treatment hydrolysis acidification tank, and further comprising the following steps:

[0048] S1. Add sewage and a microbial solvent for sewage hydrolysis and acidification reaction into the upper hydrolysis chamber, start the agitator, aeration pipe, pumping mechanism and motor, and then the sewage completes preliminary hydrolysis and acidification treatment in the upper hydrolysis chamber and produces a small amount of sludge. The sewage carries a small amount of sludge and flows into the filter box through the water supply pipe. The sludge produced by hydrolysis and acidification is filtered by the first filter screen and falls into the sewage storage box through the baffle. At this time, the sludge can be prevented from flowing back into the filter box in large quantities under the limitation of the baffle. The filtered sewage flows into the lower hydrolysis chamber through the first filter screen and is deeply hydrolyzed and acidified. At the same time, the pumping mechanism takes out the sewage in the lower hydrolysis chamber and supplies it to the upper hydrolysis chamber to form a circulating water flow for the first filter screen to continuously filter the sludge.

[0049] S2, after the hydrolysis and acidification treatment is completed, the wastewater after the hydrolysis and acidification treatment is discharged from the lower hydrolysis chamber;

[0050] S3. After the wastewater treated by hydrolysis and acidification is completely discharged, the drainage pipeline is opened to discharge the wastewater stored in the waste storage tank;

[0051] S4, open the lock and draw out the dirt storage box, take out the sludge stored in the dirt storage box, and complete the cleaning and recycling of the sludge.

[0052] The hydrolysis acidification tank and treatment method for high COD sewage treatment of the present invention have the following beneficial effects compared with the prior art:

[0053] (1) The sludge is filtered by a first filter screen arranged on one side of the filter box. During the hydrolysis and acidification treatment, the upper hydrolysis chamber always contains only a small amount of sludge. The sewage in the upper hydrolysis chamber carries a small amount of sludge and flows into the interior of the filter box and is filtered, which can prevent the sludge from blocking the flow channel during the flow into the filter box. Due to the formation of a circulating water flow under the action of the pumping mechanism, the sludge can be filtered once by the first filter screen each time the sewage passes through the filter box. As a result, when the sewage is deeply hydrolyzed and acidified in the lower hydrolysis chamber, the sludge generation rate is significantly reduced, so that the hydrolysis and acidification tank of the present application can perform hydrolysis and acidification for a longer period of time. During the hydrolysis and acidification process, there is no need to clean the generated sludge separately, thereby increasing the hydrolysis and acidification efficiency.

[0054] (2) Specifically, when the hydrolysis acidification treatment is carried out, the motor is started synchronously. Since the motor is fixedly connected to the adapter ring through the crankshaft, when the crankshaft is adjusted to rotate by the motor, the crankshaft synchronously drives the sliding rod to rotate through the adapter ring. The sliding rod drives the sliding ring to reciprocate up and down by sliding on the sliding ring. The sliding ring that reciprocates up and down drives the upper scraper to reciprocate through the connecting shaft. The reciprocating upper scraper can scrape off the sludge remaining on the filter box wall and the first filter screen, thereby preventing a large amount of sludge remaining on the first filter screen from reducing the filtering effect of the first filter screen, which is convenient for use.

[0055] (3) Specifically, during the hydrolysis and acidification treatment, the sludge filtered by the first filter can be stored in a large amount inside the sewage storage tank under the cover of the baffle. After the hydrolysis and acidification reaction is completed, the drainage pipeline can be opened to discharge the sewage in the sewage storage tank. After the sewage storage tank is pulled out by opening the lock, the filtered sludge can be collected and recycled for easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0057] Figure 1 It is a front perspective view of a hydrolysis acidification tank for high COD sewage treatment of the present invention;

[0058] Figure 2 It is a rear perspective view of a hydrolysis acidification tank for high COD wastewater treatment of the present invention;

[0059] Figure 3 A first three-dimensional schematic diagram of the internal structure of a hydrolysis acidification tank for high COD wastewater treatment according to the present invention;

[0060] Figure 4 A second three-dimensional schematic diagram of the internal structure of a hydrolysis acidification tank for high COD wastewater treatment according to the present invention;

[0061] Figure 5 It is a cross-sectional view of a hydrolysis acidification tank for high COD sewage treatment of the present invention;

[0062] Figure 6 The high COD sewage treatment water acidification tank of the present invention Figure 5 An enlarged schematic diagram of point A is shown;

[0063] Figure 7 It is a schematic diagram of the assembly method of the top assembly box and the filter box of the hydrolysis acidification tank for high COD sewage treatment of the present invention;

[0064] Figure 8 The high COD sewage treatment water acidification tank of the present invention Figure 7 The structure shown is a three-dimensional left-side schematic diagram with the top assembly box and filter box removed;

[0065] Fig. 9 The high COD sewage treatment water acidification tank of the present invention Figure 7 The structure shown is a three-dimensional right-side schematic diagram with the top assembly box and filter box removed;

[0066] Fig.10 It is a bottom view schematic diagram of the connection mode between the regulating rod and the upper scraper of the hydrolysis acidification tank for high COD sewage treatment of the present invention;

[0067] Fig.11 The high COD sewage treatment water acidification tank of the present invention Fig.10 The enlarged schematic diagram of point B is shown;

[0068] Fig.12 It is a top view schematic diagram of the connection mode between the regulating rod and the upper scraper of the hydrolysis acidification tank for high COD sewage treatment of the present invention;

[0069] Fig.13 The high COD sewage treatment water acidification tank of the present invention Fig.12 An enlarged schematic diagram of point C is shown. DETAILED DESCRIPTION

[0070] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0071] like Figures 1 to 13 As shown, the hydrolysis acidification tank for high COD sewage treatment of the present invention comprises a hydrolysis acidification tank body 1, a partition plate 2, a filter box 31, a first filter screen 32, a baffle 33, a sewage collecting component 4 and a pumping mechanism 54, wherein the hydrolysis acidification tank body 1 is used to hydrolyze acidified sewage, and the partition plate 2 is arranged inside the hydrolysis acidification tank body 1, and divides the hydrolysis acidification tank body 1 into an upper hydrolysis chamber 11, a middle sewage filtering chamber 12 and a lower hydrolysis chamber 13; the filter box 31 is arranged inside the middle sewage filtering chamber 12, and the first filter screen 32 is arranged on one side of the filter box 31, and the filter box 31 A flow channel 311 is formed for sewage to flow, and the first filter screen 32 covers the flow channel 311 for filtering sludge; the sewage collecting component 4 is arranged inside the lower hydrolysis chamber 13, and a sewage hole 21 connected to the sewage collecting component 4 and the flow channel 311 is opened on the isolation plate 2, and the baffle 33 is an inclined plate, which is arranged inside the filter box 31 and extends through the sewage hole 21 to the inner side of the sewage collecting component 4, and the baffle 33 is sealed and fitted with the filter box 31 and the sewage hole 21; the pumping mechanism 54 is used to extract the water in the lower hydrolysis chamber 13 and supply it to the upper hydrolysis chamber 11.

[0072] In the specific implementation, the hydrolysis acidification tank body 1 is a square tank, and one side of the hydrolysis acidification tank body 1 is connected to a sewage discharge pipeline connected to the lower hydrolysis chamber 13, and the sewage discharge pipeline is used to discharge the sewage after the hydrolysis acidification reaction is completed. The partition plate 2 has an upper partition and a lower partition, and the upper partition is sealed with the inner wall of the hydrolysis acidification tank body 1. An opening for the sewage in the middle filter chamber 12 to flow to the lower hydrolysis chamber 13 is formed between the lower partition and the box wall of the hydrolysis acidification tank body 1, and the sewage drop hole 21 is opened at the lower On the partition, the sewage in the flow channel 311 flows in the horizontal direction, and the pumping mechanism 54 includes a water pump 541, a pumping pipe 542, a second filter 543 and a return pipe 544, wherein the water pump 541 is fixedly connected to the hydrolysis acidification tank body 1, the pumping pipe 542 is connected to the lower hydrolysis chamber 13 and the water pump 541, the return pipe 544 is connected to the upper hydrolysis chamber 11 and the water pump 541, and the second filter 543 is arranged at the water inlet of the pumping pipe 542 to block the sludge.

[0073] In a specific implementation, sewage and a microbial solvent for sewage hydrolysis and acidification reaction are added to the interior of the upper hydrolysis chamber 11, and the pumping mechanism 54 is started. At this time, the sewage in the hydrolysis and acidification process flows into the interior of the lower hydrolysis chamber 13 through the upper hydrolysis chamber 11 and the middle sewage filter chamber 12, and under the action of the pumping mechanism 54, it flows back to the interior of the upper hydrolysis chamber 11 to form a circulating water flow. When the sewage flows through the upper hydrolysis chamber 11, a preliminary hydrolysis and acidification reaction is carried out and a small amount of sludge is produced. When the sewage carrying a small amount of sludge flows into the interior of the filter box 31, it is filtered by the first filter screen 32, and the sludge falls into and is stored in the interior of the sewage collecting component 4 through the baffle 33. Since the baffle 33 is an inclined plate, the sludge can be effectively prevented from flowing back to the interior of the filter box 31 by blocking the sludge, thereby blocking the first filter screen 32. During the hydrolysis and acidification treatment, the upper hydrolysis chamber 11 always contains only a small amount of sludge. The sewage in the upper hydrolysis chamber 11 carries a small amount of sludge and flows into the filter box 31 and is filtered, which can prevent the sludge from blocking the flow channel during the flow into the filter box 31. Due to the formation of a circulating water flow under the action of the pumping mechanism 54, the sludge can be filtered once by the first filter screen 32 every time the sewage passes through the filter box 31, so that the sewage is deeply hydrolyzed and acidified in the lower hydrolysis chamber 13. At the same time, when the sewage is deeply hydrolyzed and acidified, the sludge generation rate is significantly reduced, so that the hydrolysis and acidification tank of the present application can carry out hydrolysis and acidification for a longer time, and there is no need to clean the generated sludge separately during the hydrolysis and acidification process, thereby increasing the hydrolysis and acidification efficiency.

[0074] As a preferred embodiment, it also includes multiple agitators 51, aeration pipes 52, water supply pipes 53 and pumping mechanisms 54, wherein the upper hydrolysis chamber 11 and the middle sewage filter chamber 12 are separated from each other, and the middle sewage filter chamber 12 and the lower hydrolysis chamber 13 are connected to each other; the multiple agitators 51 are respectively arranged inside the upper hydrolysis chamber 11 and the lower hydrolysis chamber 13 for stirring sewage, and the aeration pipes 52 extend to the interior of the upper hydrolysis chamber 11 and the lower hydrolysis chamber 13 for aeration, and the water supply pipe 53 is connected to the upper hydrolysis chamber 11 and the flow channel 311.

[0075] Preferably, a plurality of agitators 51 are provided in both the upper hydrolysis chamber 11 and the lower hydrolysis chamber 13, and the plurality of agitators 51 are equidistantly distributed in the longitudinal direction. A plurality of aeration nozzles are provided on the aeration pipe 52, and the plurality of aeration nozzles are equidistantly distributed in the height direction.

[0076] In a specific implementation, the agitator 51 and the aeration pipe 52 are started to perform hydrolysis and acidification treatment on the sewage.

[0077] As a preferred embodiment, the sewage collecting component 4 includes a bottom assembly box 41, a sewage storage box 42, a lock 43 and a drainage pipe 44, wherein the bottom assembly box 41 is fixedly connected to the isolation plate 2, and an assembly through hole 14 connected to the bottom assembly box 41 is opened on one side of the hydrolysis acidification tank body 1; the sewage storage box 42 passes through the assembly through hole 14 and is slidably connected to the bottom assembly box 41, the sewage storage box 42 is sealed and fitted with the assembly through hole 14, and the side wall of the sewage storage box 42 is a water filter net wall; the lock 43 is arranged on the outside of the hydrolysis acidification tank body 1, and is used to locate the sliding position of the sewage storage box 42; the drainage pipe 44 is connected to the sewage storage box 42, and is used to discharge the sewage in the sewage storage box 42.

[0078] In a specific implementation, a sealing ring is disposed inside the assembly through hole 14 , the dirt storage box 42 is sealed against the sealing ring, and a handle 45 is fixedly connected to the outside of the dirt storage box 42 .

[0079] Specifically, during the hydrolysis and acidification treatment, the sludge filtered by the first filter screen 32 can be stored in a large amount inside the sewage storage tank 42 under the cover of the baffle 33. After the hydrolysis and acidification reaction is completed, the drainage pipe 44 can be opened to discharge the sewage in the sewage storage tank 42. After the sewage storage tank 42 is pulled out by opening the lock 43, the filtered sludge can be collected and recycled for convenient use.

[0080] As a preferred embodiment, it also includes a driving mechanism 6 and an upper scraper 71, wherein the side wall of the first filter screen 32 is aligned with the inner wall of the filter box 31 in the height direction; the upper scraper 71 is located inside the filter box 31 and is sealed with the box wall of the filter box 31, and a first water filter hole is opened on the upper scraper 71; the driving mechanism 6 is used to drive the upper scraper 71 to slide in a direction close to or away from the sewage hole 21.

[0081] In a specific implementation, the filter box 31 is a rectangular box, and the hole spacing of the dirt holes 21 is the same as the distance from the inner wall of the filter box 31 , which is the distance in the width direction of the filter box 31 .

[0082] With this design, when filtering the sludge through the first filter screen 32 , the driving mechanism 6 can be synchronously started to drive the upper scraper 71 to move up and down. The upper scraper 71 moving up and down can scrape off the sludge adsorbed on the first filter screen 32 to prevent the sludge from clogging the first filter screen 32 .

[0083] As a preferred embodiment, the driving mechanism 6 includes a top assembly box 61, a sliding ring 62, a sliding rod 63, an adapter ring 64 and a motor 65, wherein the top assembly box 61 is arranged inside the upper hydrolysis chamber 11; the sliding ring 62 is a square ring slidably arranged on the inner side of the top assembly box 61, and is fixedly connected to the upper scraper 71 through a connecting shaft 67; the sliding rod 63 is slidably arranged on one side of the sliding ring 62; the adapter ring 64 is rotatably arranged on the peripheral side of the sliding rod 63; the motor 65 is arranged inside the top assembly box 61, and is fixedly connected to the adapter ring 64 through a crankshaft 66.

[0084] In a specific implementation, a switch door is provided on the side wall of the top assembly box 61, and the motor 65 can be maintained by opening the switch door.

[0085] Specifically, when the hydrolysis acidification treatment is carried out, the motor 65 is started synchronously. Since the motor 65 is fixedly connected to the adapter ring 64 through the crankshaft 66, when the crankshaft 66 is adjusted to rotate by the motor 65, the crankshaft 66 synchronously drives the sliding rod 63 to rotate through the adapter ring 64. The sliding rod 63 drives the sliding ring 62 to reciprocate up and down by sliding on the sliding ring 62. The sliding ring 62 that reciprocates up and down drives the upper scraper 71 to reciprocate through the connecting shaft 67. The reciprocating upper scraper 71 can scrape off the sludge remaining on the wall of the filter box 31 and the first filter screen 32, thereby preventing a large amount of sludge remaining on the first filter screen 32 from reducing the filtering effect of the first filter screen 32, which is convenient for use.

[0086] As a preferred embodiment, it also includes a lower scraper 72 and an adjustment component 8, wherein the lower scraper 72 is rotatably arranged relative to the upper scraper 71, a second water filter hole is opened on the lower scraper 72, and is vertically aligned with the baffle 33, the baffle 33 is an inclined arc-shaped plate, and the end of the lower scraper 72 is in conflict with the box wall of the filter box 31; the adjustment component 8 is used to regulate the rotation of the lower scraper 72.

[0087] Specifically, when adjusting the upper scraper 71 to move downward, the upper scraper 71 simultaneously drives the lower scraper 72 to move downward, and the lower scraper 72 scrapes the side wall of the filter box 31 and the first filter screen 32 at the same time. When the lower scraper 72 moves to the baffle 33, the lower scraper 72 is driven to rotate by the adjusting component 8. The rotating lower scraper 72 can scrape off the sludge adsorbed on the top of the baffle 33, thereby preventing accumulation on the top of the baffle 33, thereby increasing the sludge content in the filter box 31.

[0088] As a preferred embodiment, it also includes a first return spring 73, and the adjustment component 8 includes an adjustment rod 81, an adjustment plate 82, an outer plate 83, a pressure piece 84 and a second return spring 85, wherein the lower scraper plate 72 includes a connecting portion 721, a scraping portion 722 and a regulating portion 723, the connecting portion 721 is a column, the scraping portion 722 and the regulating portion 723 are both plates, and are fixedly connected to the connecting portion 721 and extend to opposite sides of the connecting portion 721 respectively, and one end of the scraping portion 722 away from the connecting portion 721 is in conflict with the box wall of the filter box 31; the first return spring 73 is arranged between the lower scraper plate 72 and the upper scraper plate 71, and is used to reset the rotation position of the lower scraper plate 72; the adjustment rod 81 passes through the isolation plate 2, and extends to the filter box 31 and the top assembly respectively. The inside of the box 61; the adjustment plate 82 is arranged at one end of the adjustment rod 81 and extends into the gap formed between the control portion 723 and the connecting portion 721; the outer plate 83 is rotatably arranged at the end of the adjustment rod 81 away from the adjustment plate 82; the pressing member 84 is arranged inside the top assembly box 61, and the pressing member 84 includes a contact wall 841, the contact wall 841 is an inclined wall, and the contact wall 841 is relative to the outer plate 83 in the height direction, the distance between the end of the outer plate 83 and the contact wall 841 in the height direction is a, the distance between the end of the scraping portion 722 and the baffle 33 in the height direction is b, and the relationship between a and b is: a=b; the second reset spring 85 is arranged between the outer plate 83 and the adjustment rod 81, and is used to reset the rotation position of the outer plate 83.

[0089] In the specific implementation, the adjustment plate 82 is inserted between the regulating portion 723 and the connecting portion 721, and under the restriction of the regulating portion 723 and the connecting portion 721, the adjustment plate 82 can move with the lower scraper 72. When the driving mechanism 6 adjusts the lower scraper 72 to move, the adjustment plate 82 moves with the lower scraper 72. Since a=b, when the lower scraper 72 moves downward to the contact baffle 33, the outer plate 83 synchronously contacts the contact wall 841, and the lower scraper 72 continues to be adjusted to move. At this time, the outer plate 83 is in the contact The adjusting plate 82 rotates upward under the limit of the wall 841, and the adjusting plate 82 contacts the regulating portion 723 upward, so that the lower scraper plate 72 rotates to complete the scraping of the sludge on the top of the baffle 33. When the outer plate 83 rotates to disengage from the contact wall 841, the regulating portion 723 is still located on the top of the adjusting plate 82. At this time, the lower scraper plate 72 can continue to drive the adjusting plate 82 to move downward, and the scraping portion 722 passes through the dirt drop hole 21, thereby smoothly guiding the scraped sludge to the inside of the dirt storage box 42 for storage in the dirt storage box 42.

[0090] In a specific implementation, there are two lower scrapers 72 and two baffles 33 . The two lower scrapers 72 and the two baffles 33 are aligned in the vertical direction and are symmetrically distributed relative to the middle of the filter box 31 .

[0091] As a preferred embodiment, it also includes an inner assembly box 86, wherein the inner assembly box 86 is arranged inside the top assembly box 61, the adjustment rod 81 passes through and extends to the inside of the inner assembly box 86, and the pressing piece 84 is arranged on the inner side of the inner assembly box 86, and the sliding ring 62 is sleeved on the outer side of the inner assembly box 86 and is slidably connected to the inner assembly box 86.

[0092] As a preferred embodiment, it also includes a first connecting member 74 and a first connecting rod 75, and the adjusting assembly 8 also includes a second connecting member 87 and a second connecting rod 88, wherein the first connecting member 74 is arranged at the bottom of the upper scraper plate 71, and the lower scraper plate 72 is rotatably connected to the first connecting member 74; the first connecting rod 75 is fixedly connected to the first connecting member 74 and passes through the lower scraper plate 72, and the first return spring 73 is sleeved on the peripheral side of the first connecting member 74 and is fixedly connected to the lower scraper plate 72 and the first connecting member 74; the second connecting member 87 is arranged at one end of the adjusting rod 81 away from the adjusting plate 82, and the outer plate 83 is rotatably connected to the second connecting member 87; the second connecting rod 88 is fixedly connected to the second connecting member 87 and passes through the outer plate 83, and the second return spring 85 is sleeved on the peripheral side of the second connecting rod 88 and is fixedly connected to the second connecting member 87 and the outer plate 83.

[0093] In a specific implementation, the first connecting member 74 is fixedly connected to the upper scraper 71, and the second connecting member 87 is fixedly connected to the adjusting rod 81. With this design, when the lower scraper 72 and the outer plate 83 are adjusted to rotate, the first return spring 73 and the second return spring 85 can both be deformed under the limit of the connecting rod to increase the deformation stability of the first return spring 73 and the second return spring 85.

[0094] The present invention also discloses a method for treating high COD wastewater using a hydrolysis acidification tank, comprising the above-mentioned high COD wastewater treatment hydrolysis acidification tank, and further comprising the following steps:

[0095] Step 1: Add sewage and a microbial solvent for sewage hydrolysis and acidification reaction into the upper hydrolysis chamber 11, start the agitator 51, the aeration pipe 52, the pumping mechanism 54 and the motor 65, at this time, the sewage completes the preliminary hydrolysis and acidification treatment in the upper hydrolysis chamber 11 and produces a small amount of sludge, and the sewage carries a small amount of sludge and flows into the filter box 31 through the water supply pipe 53, and the sludge produced by the hydrolysis and acidification is filtered by the first filter screen 32 and falls into the sewage storage box 42 through the baffle 33. At this time, the sludge can be prevented from flowing back into the filter box 31 in large quantities under the limitation of the baffle 33, and the filtered sewage flows into the lower hydrolysis chamber 13 through the first filter screen 32 and is deeply hydrolyzed and acidified. At the same time, the pumping mechanism 54 takes out the sewage in the lower hydrolysis chamber 13 and supplies it to the upper hydrolysis chamber 11, forming a circulating water flow for the first filter screen 32 to continuously filter the sludge;

[0096] Step 2: After the hydrolysis and acidification treatment is completed, the wastewater that has been hydrolyzed and acidified is discharged from the lower hydrolysis chamber 13;

[0097] Step 3: After the wastewater treated by hydrolysis and acidification is completely discharged, the drainage pipe 44 is opened to discharge the wastewater stored in the waste storage tank 42;

[0098] Step 4: Open the lock 43 and pull out the dirt storage box 42, and take out the sludge stored in the dirt storage box 42, thereby completing the cleaning and recycling of the sludge.

[0099] The working principle of the present invention is introduced below:

[0100] When the sewage is hydrolyzed and acidified, sewage and a microbial solvent for the sewage hydrolysis and acidification reaction are added to the upper hydrolysis chamber 11, and the agitator 51, the aeration pipe 52, the pumping mechanism 54 and the motor 65 are started simultaneously. At this time, the sewage forms a circulating water flow under the action of the pumping mechanism 54, and the sewage is preliminarily hydrolyzed and acidified in the upper hydrolysis chamber 11, and is deeply hydrolyzed and acidified in the lower hydrolysis chamber 13. The sewage that has completed the preliminarily hydrolyzed and acidified treatment carries a small amount of sludge through the filter box 31 and is filtered by the first filter screen 32 in the filter box 31. The filtered sludge is stored in the sewage storage box 42 under the cover of the baffle 33. After the hydrolysis and acidification are fully reacted, the reacted sewage is discharged from the lower hydrolysis chamber 13, and then the sewage stored in the sewage storage box 42 is discharged from the drainage pipe 44. After the sewage is discharged, the lock 43 is opened to extract the sewage storage box 42, so as to pour out the sludge stored in the sewage storage box 42 and collect and recycle it.

[0101] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydrolysis acidification tank for high COD wastewater treatment, characterized in that: The invention comprises a hydrolysis acidification tank body (1), an isolation plate (2), a filter box (31), a first filter screen (32), a baffle (33), a sewage collection assembly (4), a pumping mechanism (54), a plurality of agitators (51), a water supply pipe (53), a driving mechanism (6), an upper scraper (71), a lower scraper (72), a first return spring (73), a first connecting member (74), a first connecting rod (75) and an adjusting assembly (8), wherein the driving mechanism (6) comprises a top assembly box (61), a sliding ring (62), a sliding rod (63), an adapter ring (64) and a motor (65), and the adjusting assembly (8) comprises an adjusting rod (81), an adjusting plate (82), an outer plate (83), a pressing member (84), a second return spring (85), a second connecting member (87) and a second connecting rod (88), wherein: The hydrolysis and acidification tank body (1) is used to hydrolyze acidified sewage, and the isolation plate (2) is arranged inside the hydrolysis and acidification tank body (1) and divides the hydrolysis and acidification tank body (1) into an upper hydrolysis chamber (11), a middle sewage filtering chamber (12) and a lower hydrolysis chamber (13); A filter box (31) is arranged inside the middle sewage filter chamber (12), and the first filter screen (32) is arranged on one side of the filter box (31), the filter box (31) forms a flow channel (311) for sewage to flow, and the first filter screen (32) covers the flow channel (311) for filtering sludge; A sewage collecting component (4) is arranged inside the lower hydrolysis chamber (13); a sewage dropping hole (21) communicating with the sewage collecting component (4) and the flow channel (311) is provided on the isolation plate (2); the baffle plate (33) is an inclined plate, arranged inside the filter box (31) and extending through the sewage dropping hole (21) to the inner side of the sewage collecting component (4); the baffle plate (33) is in sealing contact with the filter box (31) and the sewage dropping hole (21); The pumping mechanism (54) is used to pump out water in the lower hydrolysis chamber (13) and supply the water to the upper hydrolysis chamber (11); The upper hydrolysis chamber (11) and the middle sewage filtering chamber (12) are separated from each other, and the middle sewage filtering chamber (12) and the lower hydrolysis chamber (13) are communicated with each other; The plurality of stirrers (51) are respectively arranged inside the upper hydrolysis chamber (11) and the lower hydrolysis chamber (13) for stirring sewage, and the water supply pipe (53) is connected to the upper hydrolysis chamber (11) and the flow channel (311); The side wall of the first filter screen (32) is aligned with the inner wall of the filter box (31) in the height direction; The upper scraper (71) is located inside the filter box (31) and is in sealing contact with the box wall of the filter box (31); a first water filtering hole is formed on the upper scraper (71); The driving mechanism (6) is used to drive the upper scraper (71) to slide in a direction close to or away from the dirt drop hole (21); A top assembly box (61) is arranged inside the upper hydrolysis chamber (11); The sliding ring (62) is a square ring, slidably disposed on the inner side of the top assembly box (61), and fixedly connected to the upper scraper (71) via a connecting shaft (67); A sliding rod (63) slidably disposed on one side of the sliding ring (62); An adapter ring (64) rotatably disposed on a peripheral side of the sliding rod (63); A motor (65) is arranged inside the top assembly box (61) and is fixedly connected to the adapter ring (64) via a crankshaft (66); The lower scraper (72) is rotatably arranged relative to the upper scraper (71), a second water filtering hole is formed on the lower scraper (72), and is vertically positioned relative to the baffle (33), the baffle (33) is an inclined arc-shaped plate, and an end of the lower scraper (72) is in contact with a box wall of the filter box (31); The filter box (31) is a rectangular box, and the hole spacing of the dirt drop holes (21) is the same as the inner wall distance of the filter box (31) in the width direction; The adjustment component (8) is used to adjust the rotation of the lower scraper (72); The lower scraper (72) comprises a connecting portion (721), a scraping portion (722) and a regulating portion (723); the connecting portion (721) is a column; the scraping portion (722) and the regulating portion (723) are both plates, and are fixedly connected to the connecting portion (721) and extend to opposite sides of the connecting portion (721), respectively; and one end of the scraping portion (722) away from the connecting portion (721) contacts the box wall of the filter box (31); a first return spring (73), arranged between the lower scraper plate (72) and the upper scraper plate (71), and used for returning the rotational position of the lower scraper plate (72); The number of the lower scraper (72) and the number of the baffle (33) are both two, and the two lower scrapers (72) and the two baffles (33) are aligned in the vertical direction and are symmetrically distributed relative to the middle of the filter box (31); An adjusting rod (81) passes through the isolation plate (2) and extends to the interior of the filter box (31) and the top assembly box (61) respectively; An adjustment plate (82) is arranged at one end of the adjustment rod (81) and extends into a gap formed between the adjustment portion (723) and the connection portion (721); An outer plate (83) rotatably disposed on an end of the adjusting rod (81) away from the adjusting plate (82); A pressing member (84) is arranged inside the top assembly box (61), and the pressing member (84) includes a contact wall (841), the contact wall (841) is an inclined wall, and the contact wall (841) is opposite to the outer plate (83) in the height direction, the distance between the end of the outer plate (83) and the contact wall (841) in the height direction is a, the distance between the end of the scraping part (722) and the baffle (33) in the height direction is b, and the relationship between a and b is: a=b; a second return spring (85), disposed between the outer plate (83) and the adjustment rod (81), and used for returning the rotational position of the outer plate (83); A first connecting member (74) is arranged at the bottom of the upper scraper (71), and the lower scraper (72) is rotatably connected to the first connecting member (74); a first connecting rod (75) fixedly connected to the first connecting member (74) and penetrating the lower scraper plate (72); the first return spring (73) sleeved on the circumference of the first connecting member (74) and fixedly connected to the lower scraper plate (72) and the first connecting member (74); A second connecting member (87) is arranged at an end of the adjusting rod (81) away from the adjusting plate (82), and the outer plate (83) is rotatably connected to the second connecting member (87); a second connecting rod (88) fixedly connected to the second connecting member (87) and penetrating the outer plate (83); the second return spring (85) is sleeved on a circumferential side of the second connecting rod (88) and fixedly connected to the second connecting member (87) and the outer plate (83); The adjusting plate (82) is inserted between the adjusting portion (723) and the connecting portion (721), and under the restriction of the adjusting portion (723) and the connecting portion (721), the adjusting plate (82) moves together with the lower scraper (72); when the driving mechanism (6) adjusts the lower scraper (72) to move, the adjusting plate (82) moves together with the lower scraper (72); when the lower scraper (72) moves downward to contact the baffle (33), the outer plate (83) contacts the contact wall (841) synchronously, and the lower scraper (72) continues to be adjusted. The outer plate (83) moves upward under the limit of the abutment wall (841), and the adjusting plate (82) abuts the regulating portion (723) upward, so that the lower scraper (72) rotates to complete the scraping of the sludge on the top of the baffle (33). When the outer plate (83) rotates to be separated from the abutment wall (841), the regulating portion (723) is still located at the top of the adjusting plate (82), and the lower scraper (72) continues to drive the adjusting plate (82) to move downward, and the scraping portion (722) passes through the sludge drop hole (21).

2. The hydrolysis acidification tank for high COD sewage treatment according to claim 1, characterized in that: The sewage collection assembly (4) comprises a bottom assembly box (41), a sewage storage box (42), a lock (43) and a drainage pipeline (44), wherein: A bottom assembly box (41) is fixedly connected to the isolation plate (2), and an assembly through hole (14) communicating with the bottom assembly box (41) is provided on one side of the hydrolysis acidification tank body (1); A dirt storage box (42) passes through the assembly through hole (14) and is slidably connected to the bottom assembly box (41); the dirt storage box (42) is sealed and fitted with the assembly through hole (14), and the side wall of the dirt storage box (42) is a water filter screen wall; A lock buckle (43) is arranged on the outside of the hydrolysis acidification tank body (1) and is used to locate the sliding position of the sewage storage box (42); The drainage pipeline (44) is in communication with the sewage storage tank (42) and is used to discharge sewage in the sewage storage tank (42).

3. The hydrolysis acidification tank for high COD wastewater treatment according to claim 1, characterized in that: Also included is an internal assembly box (86), wherein: The inner assembly box (86) is arranged inside the top assembly box (61), the adjustment rod (81) penetrates and extends into the inner assembly box (86), and the pressing member (84) is arranged on the inner side of the inner assembly box (86), and the sliding ring (62) is sleeved on the outer side of the inner assembly box (86) and is slidably connected to the inner assembly box (86).

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