A sequencing batch coagulation air flotation and sedimentation integrated device

Abstract

The utility model discloses a sequence batch type coagulation air floatation and precipitation integrated equipment, is provided with coagulation area, flocculation area, air floatation area, precipitation area, sludge intermediate pool and intermediate water pool on equipment main part, and coagulation area and flocculation area are connected through first connecting passage, and the communication between flocculation area and air floatation area is through second connecting passage, and the communication between flocculation area and precipitation area is through third connecting passage, and the communication between air floatation area and precipitation area is through fourth connecting passage, is provided with automatic slag scraper on air floatation area, and air floatation area is communicated with intermediate water pool through fifth connecting passage, and precipitation area is communicated with intermediate water pool through sixth connecting passage, and equipment main part still is provided with PLC automatic control system, automatic dosing system, is provided with switch valve on each passage, and the opening and closing are controlled by PLC automatic control system. In this way, satisfy single air floatation reaction, single precipitation reaction, double processing of air floatation reaction and then precipitation these three modes, are suitable for small and medium-sized wastewater quantity, and the enterprise of wastewater type is not fixed.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment equipment, and in particular to a sequential batch coagulation-air flotation sedimentation integrated equipment. Background Technology

[0002] The pollutants in wastewater discharged from industrial processing are diverse. Current treatment methods typically employ specialized wastewater treatment equipment and processes for specific types of wastewater. For example, some wastewater treatment equipment uses air flotation, others sedimentation, and still others employ multi-stage treatment. For instance, CN220664965U discloses an integrated air flotation and sedimentation system, comprising: a first reaction tank for receiving wastewater to be treated; an air flotation tank for separating the wastewater into scum and treated water; a sludge tank for scraping scum to form sludge; an intermediate water tank for receiving treated water and pressurizing it for dissolved air treatment; a second reaction tank for coagulation reaction of the pressurized dissolved air wastewater to form precipitate; and a sedimentation tank for receiving and discharging the sludge and precipitate, along with the treated wastewater. This system addresses the issue of some wastewater containing scum but also sludge and sediment, resulting in high SS levels or unclear effluent. Before dissolved air flotation (DAF), a coagulant is added to the water to compress the double electric layer, promoting the coagulation of suspended solids and causing them to adhere to air bubbles and float to the surface. The wastewater to be treated enters the first reaction tank. Through the dissolved air release zone's guide pipe, it enters the contact zone of the DAF tank, where microbubbles mix evenly with the wastewater, causing suspended particles in the wastewater to adhere to the bubbles. After passing through a baffle, the wastewater enters the DAF separation zone for separation. Pollutants in the water float to the surface with the rising air bubbles, while scum is discharged into the sludge tank through sludge openings. The treated effluent is collected through a collection pipe at the bottom of the tank and discharged into the intermediate water tank. Part of the water in the intermediate water tank is recirculated and pressurized through the dissolved air pump's suction port, releasing a large number of microbubbles to the contact zone through the release zone interface. The water after DAF enters the second reaction tank through the first opening for coagulation and flocculation, and then enters the sedimentation tank through the second opening. The settled sludge naturally settles into the sedimentation tank's sludge hopper, and is periodically discharged through the first sludge discharge port. Finally, the clear water is discharged through the effluent outlet of the sedimentation tank. The sludge from the sludge pond is discharged periodically through the second sludge discharge outlet.

[0003] However, for companies with small wastewater volumes and multiple wastewater types (two or more types of wastewater), it is necessary to purchase multiple types of wastewater treatment equipment, which not only requires a large area but also involves high equipment investment.

[0004] Therefore, a new technical solution needs to be researched to address the above problems. Utility Model Content

[0005] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a sequential batch coagulation-flotation-sedimentation integrated equipment that can meet the three treatment methods of single flotation reaction, single sedimentation reaction, and dual treatment of flotation reaction followed by sedimentation. It is suitable for enterprises with small to medium wastewater volume and variable wastewater type.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A sequential batch coagulation-flotation-sedimentation integrated equipment includes a main body, on which a coagulation zone, a flocculation zone, a flotation zone, a sedimentation zone, a sludge intermediate tank, and an intermediate water tank are provided.

[0008] The coagulation zone and the flocculation zone are connected by a first connecting channel, and a first switching valve is installed on the first connecting channel; the flocculation zone and the flotation zone are connected by a second connecting channel, and a second switching valve is installed on the second connecting channel; the flocculation zone and the sedimentation zone are connected by a third connecting channel, and a third switching valve is installed on the third connecting channel; the flotation zone and the sedimentation zone are connected by a fourth connecting channel, and a fourth switching valve is installed on the fourth connecting channel; the flotation zone is equipped with an automatic slag scraper and a slag trough, the automatic slag scraper scrapes the slag on the top of the flotation zone into the slag trough; the flotation zone is equipped with a first clear liquid discharge hole and is connected to the intermediate water tank through a fifth connecting channel, and a fifth switching valve is installed on the fifth connecting channel; the sedimentation zone is equipped with a second clear liquid discharge hole and is connected to the intermediate water tank through a sixth connecting channel, and a sixth switching valve is installed on the sixth connecting channel;

[0009] The main body of the equipment is also equipped with a PLC automatic control system and an automatic dosing system; the PLC automatic control system is connected to and controls the automatic slag scraper, the automatic dosing system, the first switch valve, the second switch valve, the third switch valve, the fourth switch valve, the fifth switch valve, and the sixth switch valve respectively.

[0010] As a preferred embodiment, the sludge trough is provided with a first sludge discharge hole and connected to the intermediate sludge tank to deliver the sludge into the intermediate sludge tank.

[0011] As a preferred embodiment, the sedimentation zone is provided with a second sludge discharge hole and connected to the intermediate sludge tank, so as to send the sludge at the bottom of the sedimentation zone into the intermediate sludge tank.

[0012] As a preferred embodiment, the coagulation zone and flocculation zone are arranged in the front section of the main body of the equipment, the flotation zone and sedimentation zone are arranged in the middle section of the main body of the equipment, and the flotation zone is located above the sedimentation zone; the sludge intermediate tank and the intermediate water tank are arranged in the rear section of the main body of the equipment.

[0013] As a preferred embodiment, the coagulation zone and the flocculation zone are arranged side by side.

[0014] As a preferred embodiment, the sludge intermediate tank and the intermediate water tank are arranged side by side.

[0015] As a preferred embodiment, a dissolved gas tank is provided on the outside of the main body of the device, and the dissolved gas tank is located on the second connecting channel.

[0016] As a preferred embodiment, the inlet end of the coagulation zone is connected to a wastewater supply pipe, and a water quality analyzer is connected to the wastewater supply pipe, which is connected to the PLC automatic control system.

[0017] As a preferred embodiment, the automatic slag scraper is a chain-plate type sludge scraper, which includes a motor, two sets of drive sprockets, a drive chain, and scrapers. The motor drives one set of the drive sprockets to rotate, the drive chain is fitted onto the two sets of drive sprockets, and the scrapers are connected to the drive chain.

[0018] As a preferred embodiment, the scraper is made of polymer rubber.

[0019] This utility model has significant advantages and beneficial effects compared with the prior art. Specifically, as can be seen from the above technical solution, it mainly involves setting up a coagulation zone, a flocculation zone, an air flotation zone, a sedimentation zone, a sludge intermediate tank, an intermediate water tank, a PLC automatic control system, and an automatic dosing system on the main body of the equipment; the flocculation zone and the air flotation zone are connected by a second connecting channel, and a second switching valve is installed on the second connecting channel; the flocculation zone and the sedimentation zone are connected by a third connecting channel, and a third switching valve is installed on the third connecting channel; the air flotation zone and the sedimentation zone are connected by a fourth connecting channel, and the fourth connecting channel... A fourth switch valve is installed on the connection channel; different switch valves are opened and closed by the PLC automatic control system, which can flexibly realize wastewater treatment by flotation, sedimentation and multi-stage treatment as needed. It can meet the three treatment methods of single flotation reaction, single sedimentation reaction and dual treatment of flotation reaction and sedimentation. It is suitable for enterprises with small and medium wastewater volume and variable wastewater type. It effectively solves the problem of high equipment investment and management costs caused by enterprises with small wastewater volume and multiple wastewater types (two or more wastewater types) having to purchase multiple wastewater treatment equipment, which is conducive to better promoting environmental protection work.

[0020] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the structure of a sequential batch coagulation-flotation-sedimentation integrated device according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the partitions of a sequential batch coagulation-flotation-sedimentation integrated device according to an embodiment of this utility model.

[0023] Figure 3 This is an implementation scenario diagram of a sequential batch coagulation-air flotation-sedimentation integrated device according to an embodiment of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of a PLC automatic control system for a sequential batch coagulation-flotation-sedimentation integrated equipment according to an embodiment of this utility model.

[0025] Figure 5 This is a schematic diagram of the vertical arrangement of the flotation zone and the sedimentation zone in a sequential batch coagulation-flotation-sedimentation integrated device according to an embodiment of this utility model.

[0026] Figure 6 This is a schematic diagram of the structure of an automatic slag scraper in a sequential batch coagulation-air flotation-sedimentation integrated equipment according to an embodiment of this utility model. Detailed Implementation

[0027] Please refer to Figures 1 to 6 As shown, it illustrates the specific structure of an embodiment of the present invention.

[0028] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] A sequencing batch coagulation-flotation-sedimentation integrated equipment includes a main body 10, on which are arranged a coagulation zone 11, a flocculation zone 12, a flotation zone 13, a sedimentation zone 14, a sludge intermediate tank 15, and an intermediate water tank 16. The main body 10 is also equipped with a PLC automatic control system 70 and an automatic dosing system.

[0030] In this embodiment, considering the compact structure of the main body 10 and minimizing its footprint, the coagulation zone 11 and flocculation zone 12 are arranged in the front section of the main body 10, while the flotation zone 13 and sedimentation zone 14 are arranged in the middle section of the main body 10. The flotation zone 13 is positioned above the sedimentation zone 14, thus maximizing the area occupied by the flotation zone 13 within a limited space, thereby better removing scum. Figure 5As shown, the bottom surface of the flotation zone 13 can also be inclined, which can increase the flotation area and improve the flotation effect. The mixed liquid treated in the flocculation zone 12 is pumped to the dissolved air tank by a pressurized pump (air also enters the dissolved air tank at the same time), and the liquid is sent to the flotation zone 13 from the outlet of the dissolved air tank. The sludge intermediate tank 15 and the intermediate water tank 16 are arranged in the rear section of the main body 10 of the equipment. The coagulation zone 11 and the flocculation zone 12 are arranged side by side. The sludge intermediate tank 15 and the intermediate water tank 16 are arranged side by side.

[0031] The inlet of the coagulation zone 11 is connected to the wastewater supply pipe. The coagulation zone 11 and the flocculation zone 12 are connected via a first connecting channel, on which a first switching valve is installed. The flocculation zone 12 and the flotation zone 13 are connected via a second connecting channel 40, on which a second switching valve 50 is installed. The flocculation zone 12 and the sedimentation zone 14 are connected via a third connecting channel, on which a third switching valve is installed. The flotation zone 13 and the sedimentation zone 14 are connected via a fourth connecting channel, on which a fourth switching valve is installed. An automatic slag scraper 20 and a slag trough 131 are installed in the flotation zone 13. Figure 1 and Figure 6 As shown, the automatic slag scraper 20 is a chain-plate type scraper, which includes a motor 21, two sets of transmission sprockets 22, a transmission chain 23, and a scraper 24. The motor 21 drives one set of transmission sprockets 22 to rotate. The transmission chain 23 is fitted onto the two sets of transmission sprockets 22. The scraper 24 is connected to the transmission chain 23. When the motor 21 is working, the transmission sprockets 22 rotate, causing the transmission chain 23 to move. The scraper 24 moves along with the transmission chain 23, scraping the slag towards one side of the slag trough 131. The scraper 24 is made of high-polymer rubber. The hard plastic scraper 24 used in traditional technology suffers from high damage and has an unsatisfactory sludge scraping success rate. However, the use of high-polymer rubber material can adapt to the removal of various types of floating sludge, improve the sludge scraping rate, and has low sludge disturbance. The automatic slag scraper 20 scrapes the scum at the top of the flotation zone 13 into the slag trough 131. The flotation zone 13 is provided with a first clear liquid discharge hole and is connected to the intermediate water tank 16 through a fifth connecting channel. A fifth switch valve is provided on the fifth connecting channel. The sedimentation zone 14 is provided with a second clear liquid discharge hole and is connected to the intermediate water tank 16 through a sixth connecting channel. A sixth switch valve is provided on the sixth connecting channel.

[0032] The sludge trough 131 is provided with a first sludge discharge hole and connects to the intermediate sludge tank 15 to deliver sludge into the intermediate sludge tank 15. A periodic pumping method can be used, for example, by setting up a first sludge discharge machine to pump the sludge into the intermediate sludge tank. The first sludge discharge machine is connected to the PLC automatic control system 70 and is controlled by the PLC automatic control system 70. The sedimentation zone 14 is provided with a second sludge discharge hole and connects to the intermediate sludge tank 15 to deliver the settled sludge at the bottom of the sedimentation zone 14 into the intermediate sludge tank 15. A periodic pumping method can be used, for example, by setting up a second sludge discharge machine to pump the settled sludge into the intermediate sludge tank. The second sludge discharge machine is connected to the PLC automatic control system 70 and is controlled by the PLC automatic control system 70.

[0033] The PLC automatic control system 70 is connected to and controls the automatic sludge scraper 20, the automatic dosing system, the first switch valve, the second switch valve, the third switch valve, the fourth switch valve, the fifth switch valve, and the sixth switch valve. Furthermore, machines capable of automatic functions, such as the first sludge remover and the second sludge remover, can also be connected to the PLC automatic control system 70 for management, thereby improving the intelligence level of the equipment. The automatic dosing system is a commonly used functional unit in wastewater treatment. It is used to add chemicals to the corresponding tank as needed, such as adding decolorizing agent to the coagulation zone 11, adding coagulant to the coagulation zone 11, and adding flocculant to the flocculation zone 12. It is equipped with multiple sets of automatic dosing units (at least including a dosing tank, a dosing pump, and a dosing pipe), generally one set of automatic dosing units for each type of chemical.

[0034] To better meet the requirements of the dissolved air flotation reaction, a low-pressure dissolved air tank 30 is installed on the outside of the main body 10 of the equipment. The low-pressure dissolved air tank 30 is located on the second connecting channel 40. The liquid in the flocculation zone 12 enters the low-pressure dissolved air tank 30, and compressed air is added simultaneously. The pressurized dissolved air water is connected to the release device through pipes and valves, and then suddenly reduced to atmospheric pressure. The air dissolved in the water is released from the water in the form of microbubbles (e.g., bubble diameter of about 30-120 μm). These microbubbles attach to the suspended particles in the wastewater, making them float on the water surface, and are subsequently scraped off by the automatic scraper 20, thereby achieving solid-liquid separation and purifying the water. Typically, a water level gauge is installed on the low-pressure dissolved air tank to ensure a suitable water level so that the release device can release dissolved air water as needed. Meanwhile, an exhaust valve is installed at the top of the low-pressure dissolved air tank to periodically remove undissolved air accumulated at the top, preventing a reduction in tank capacity and avoiding the agitation of free air bubbles that could affect the flotation effect of the flotation tank. A vent valve is also installed at the bottom of the low-pressure dissolved air tank for easy emptying during cleaning. It should be noted that the dissolved air tank can be installed horizontally or vertically.

[0035] In practical applications, staff can set corresponding wastewater treatment processes on the PLC automatic control system 70 based on the type of wastewater generated during the current production and processing. The type of wastewater can be determined through past production and processing experience, or by actual testing and analysis of the wastewater. Preferably, the PLC automatic control system 70 can preset three treatment modes for staff to select and set directly.

[0036] Furthermore, for companies with higher budgets, the wastewater supply pipe connected to the inlet of the coagulation zone 11 can also be equipped with a water quality analyzer, which is connected to the PLC automatic control system 70. In this way, using a commercially available water quality analyzer, based on mature technology, can effectively analyze the composition of the wastewater, and the analysis results play a decisive role in the selection of wastewater treatment methods. Therefore, it identifies pollution characteristics through wastewater composition analysis (e.g., COD, heavy metals, pH, etc.) and then matches different wastewater treatment processes. Specifically, in this embodiment, the PLC automatic control system 70 controls the wastewater to undergo either an air flotation reaction or a sedimentation reaction, or to undergo an air flotation reaction first and then enter the sedimentation zone 14, depending on the wastewater conditions.

[0037] The first wastewater treatment method is mainly suitable for treating low turbidity, high color, high organic matter, and algae-rich water. It effectively removes light flocs through microbubbles. The flotation reaction involves wastewater passing through coagulation zone 11, flocculation zone 12, and a second connecting channel into flotation zone 13. The scum from flotation zone 13 is scraped into the scum tank 131, and the clarified liquid from flotation zone 13 is collected in intermediate water tank 16 through a fifth connecting channel. Existing mature technologies can be used for the functions and implementation methods of coagulation zone 11, flocculation zone 12, flotation zone 13, sedimentation zone 14, intermediate sludge tank 15, and intermediate water tank 16. For example, in coagulation zone 11, a decolorizing agent is first added to coagulate the wastewater, separating colored factors from the water and breaking the stability of the emulsifier. Then, a pH meter controls the dosing pump to adjust the pH of the wastewater to 7.0-8.0. Finally, an automatic dosing system adds coagulant, and the mixture reacts with the coagulant particles through a compression double-stage reaction. Through mechanisms such as charge layering and charge neutralization, the flocs lose or decrease in stability, forming a large number of flocs. In the flocculation zone 12, flocculants are added by an automatic dosing system. Through mechanisms such as adsorption bridging and sediment trapping, small floc particles are formed into large floc particles. This can effectively remove suspended solids, color, and colloidal substances from wastewater and reduce organic matter. In the flotation zone 13, a high-pressure air-water mixture from a dissolved air tank is released by a release device, which attaches to the flocs and floats to the surface, where it is scraped off by an automatic scraper 20.

[0038] The second wastewater treatment method is mainly suitable for treating wastewater containing suspended solids and colloidal pollutants. The sedimentation reaction involves the wastewater passing through the coagulation zone 11, flocculation zone 12, and the third connecting channel into the sedimentation zone 14. The clear water at the top of the sedimentation zone 14 is collected into the intermediate water tank 16 through the sixth connecting channel, and the sludge can be pumped to the sludge intermediate tank 15. For example, the mixture after the reaction in the coagulation zone 11 and flocculation zone 12 enters the sedimentation zone 14, where gravity sedimentation is used to separate the sludge from the water, thereby removing suspended solids, organic matter, and some CODcr, ensuring the overall removal effect of the system.

[0039] The third wastewater treatment method is mainly suitable for treating high-concentration organic wastewater, especially wastewater containing a large amount of suspended solids, grease, and organic matter. Of course, in order to improve the effluent quality standards, the wastewater that is suitable for the first and second wastewater treatment methods can also be treated using the third wastewater treatment method as needed. The duration and dosage of each step can be set as required. The third wastewater treatment method refers to: wastewater entering the flotation zone 13 through the coagulation zone 11, the flocculation zone 12, and the second connecting channel. The scum from the flotation zone 13 is scraped into the scum tank 131. The clear liquid from the flotation zone 13 is sent to the sedimentation zone 14 for further treatment through the fourth connecting channel. In the sedimentation zone 14, gravity sedimentation is used to separate sludge from water. The clear water in the sedimentation zone 14 is collected into the intermediate water tank 16 through the sixth connecting channel. The sludge can be pumped to the intermediate sludge tank 15. This dual removal method improves the overall removal effect.

[0040] The clean water in the intermediate water tank 16 can be reused by the enterprise, while the sludge in the intermediate sludge tank 15 needs to be sent out periodically. It is evident that this sequencing batch coagulation-flotation-sedimentation integrated equipment is a highly efficient physicochemical reaction device that integrates decolorization, coagulation, flocculation, flotation, and sedimentation reactions. It is multifunctional, can replace various wastewater treatment equipment, and can effectively save floor space and reduce investment.

[0041] like Figure 3 The diagram illustrates one application scenario of this technical solution. The low-pressure dissolved air tank 30 is vertically designed. The entire sequential batch coagulation flotation sedimentation integrated equipment is located on the top floor of the factory, next to the staircase 60 on the side of the main equipment 10, facilitating staff monitoring equipment operation and maintenance. Figure 4The PLC automatic control system 70 shown is located in the area below the staircase 60. This means that the PLC automatic control system 70 is designed independently of the main equipment 10. Alternatively, the PLC automatic control system 70 can be designed and laid out inside the main equipment 10, which is equivalent to reserving a small room inside the main equipment 10 with a door facing the main equipment 10. The PLC automatic control system 70 is equipped with a PLC controller, a touch screen display, and several wiring control ports.

[0042] The key design feature of this utility model lies in the fact that it mainly comprises a coagulation zone 11, a flocculation zone 12, an air flotation zone 13, a sedimentation zone 14, a sludge intermediate tank 15, an intermediate water tank 16, a PLC automatic control system 70, and an automatic dosing system, all mounted on the main body 10 of the equipment. The flocculation zone 12 and the air flotation zone 13 are connected via a second connecting channel, which is equipped with a second switching valve. The flocculation zone 12 and the sedimentation zone 14 are connected via a third connecting channel, which is equipped with a third switching valve. The air flotation zone 13 and the sedimentation zone 14 are connected via a fourth connecting channel. A fourth switch valve is installed on the channel; different switch valves are opened and closed by the PLC automatic control system 70, which can flexibly realize wastewater treatment by flotation, sedimentation and multi-stage treatment as needed. It can meet the three treatment methods of single flotation reaction, single sedimentation reaction and dual treatment of flotation reaction and sedimentation. It is suitable for enterprises with small and medium wastewater volume and variable wastewater type. It effectively solves the problem of high equipment investment and management costs caused by enterprises with small wastewater volume and multiple wastewater types (two or more types of wastewater) having to purchase multiple wastewater treatment equipment, which is conducive to better promoting environmental protection work.

[0043] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A sequencing batch coagulation-flotation-sedimentation integrated equipment, comprising a main body of the equipment, characterized in that: The main body of the equipment is equipped with a coagulation zone, a flocculation zone, an air flotation zone, a sedimentation zone, an intermediate sludge tank, and an intermediate water tank. The coagulation zone and the flocculation zone are connected by a first connecting channel, and a first switching valve is installed on the first connecting channel; the flocculation zone and the flotation zone are connected by a second connecting channel, and a second switching valve is installed on the second connecting channel; the flocculation zone and the sedimentation zone are connected by a third connecting channel, and a third switching valve is installed on the third connecting channel; the flotation zone and the sedimentation zone are connected by a fourth connecting channel, and a fourth switching valve is installed on the fourth connecting channel; the flotation zone is equipped with an automatic slag scraper and a slag trough, the automatic slag scraper scrapes the slag on the top of the flotation zone into the slag trough; the flotation zone is equipped with a first clear liquid discharge hole and is connected to the intermediate water tank through a fifth connecting channel, and a fifth switching valve is installed on the fifth connecting channel; the sedimentation zone is equipped with a second clear liquid discharge hole and is connected to the intermediate water tank through a sixth connecting channel, and a sixth switching valve is installed on the sixth connecting channel; The main body of the equipment is also equipped with a PLC automatic control system and an automatic dosing system; the PLC automatic control system is connected to and controls the automatic slag scraper, the automatic dosing system, the first switch valve, the second switch valve, the third switch valve, the fourth switch valve, the fifth switch valve, and the sixth switch valve respectively.

2. The sequential batch coagulation-flotation-sedimentation integrated equipment according to claim 1, characterized in that: The sludge trough is provided with a first sludge discharge hole and is connected to the intermediate sludge tank to deliver sludge into the intermediate sludge tank.

3. The sequential batch coagulation-air flotation-sedimentation integrated equipment according to claim 1, characterized in that: The sedimentation zone is provided with a second sludge discharge hole and is connected to the intermediate sludge tank to send the sludge at the bottom of the sedimentation zone into the intermediate sludge tank.

4. The sequential batch coagulation-air flotation-sedimentation integrated equipment according to claim 1, characterized in that: The coagulation zone and flocculation zone are both located in the front section of the main body of the equipment, the flotation zone and sedimentation zone are located in the middle section of the main body of the equipment, and the flotation zone is located above the sedimentation zone; the sludge intermediate tank and the intermediate water tank are located in the rear section of the main body of the equipment.

5. The sequential batch coagulation-air flotation-sedimentation integrated equipment according to claim 4, characterized in that: The coagulation zone and the flocculation zone are arranged side by side.

6. A sequential batch coagulation-air flotation-sedimentation integrated equipment according to claim 4 or 5, characterized in that: The sludge intermediate tank and the intermediate water tank are arranged side by side.

7. The sequential batch coagulation-flotation-sedimentation integrated equipment according to claim 1, characterized in that: A dissolved gas tank is provided on the outside of the main body of the equipment, and the dissolved gas tank is located on the second connecting channel.

8. The sequential batch coagulation-air flotation-sedimentation integrated equipment according to claim 1, characterized in that: The inlet of the coagulation zone is connected to the wastewater supply pipe to be treated, and a water quality analyzer is connected to the wastewater supply pipe to be treated. The water quality analyzer is connected to the PLC automatic control system.

9. The sequential batch coagulation-flotation-sedimentation integrated equipment according to claim 1, characterized in that: The automatic slag scraper is a chain-plate type sludge scraper, which includes a motor, two sets of transmission sprockets, a transmission chain, and scrapers. The motor drives one set of the transmission sprockets to rotate, the transmission chain is fitted onto the two sets of transmission sprockets, and the scrapers are connected to the transmission chain.

10. A sequential batch coagulation-air flotation-sedimentation integrated equipment according to claim 9, characterized in that: The scraper is made of high-molecular rubber.

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