Method and device for treating and comprehensively utilizing domestic sewage and car wash sewage

Abstract

The present invention discloses a method and apparatus for treating and comprehensively utilizing domestic sewage and car wash wastewater, comprising: a vehicle washing apparatus disposed above ground, and apparatus disposed below ground on the first and second floors. The apparatus disposed below ground on the first floor includes a sludge filter press, a mud cake processing apparatus, an acid container, an acid-base neutralizer, an alkali container, a coagulant addition apparatus, a flocculant addition apparatus, a multifunctional online water quality analyzer, an activated carbon filter tank, and a sand filter tank. The apparatus disposed below ground on the second floor includes a sewage regulating tank, an acid-base neutralization tank, a coagulation tank, a flocculation tank, a tertiary sedimentation tank, and a biochemical aeration tank, which are sequentially connected via pipelines. The present invention utilizes the wastewater from car washes at different stages of sewage treatment, based on the characteristics of the water used at different stages, and reuses the wastewater after car washes. The apparatus has a compact structure, low investment and operating costs, is easy to operate and manage, has simple technical requirements, and can achieve automated control to the greatest extent possible.

Description

Technical Field

[0001] The present invention relates to a method for treating and comprehensively utilizing domestic sewage and car wash sewage and a device for implementing the method. The method is suitable for treating and reusing domestic sewage that does not contain grease, such as car wash water, washing water and rainwater, and belongs to the field of sewage treatment and comprehensive utilization devices. Background Art

[0002] With the increasing popularity of cars, the penetration rate of household cars in cities and towns is increasing, and the water consumption of car washing has also increased, wasting a large amount of water resources. Currently, most car wash water and washing water (such as washing clothes and bathing) are directly discharged and cannot be recycled, resulting in a significant waste of water resources. Providing a set of water treatment equipment not only takes up a lot of space, but also requires a high investment, is inconvenient to operate and manage, and has high technical requirements, making it difficult to popularize and apply. Summary of the Invention

[0003] The purpose of the present invention is to provide a car wash sewage treatment device to solve the problems of the existing technology that it occupies a large space, has high investment, is inconvenient to operate and manage, has high technical requirements, is not easy to realize automatic control, and is difficult to popularize and apply.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A method for treating and comprehensively utilizing domestic sewage and car wash sewage comprises the following steps in sequence:

[0006] (1) introducing washing water, rainwater and car wash water into the sewage regulating tank respectively; wherein, the washing water is first subjected to hair filtration treatment before being introduced into the sewage regulating tank;

[0007] (2) Carry out preliminary sedimentation of sewage in the sewage regulating tank;

[0008] (3) adding acid or alkali to the wastewater after preliminary precipitation to perform pH neutralization treatment;

[0009] (4) Adding coagulant to carry out coagulation reaction;

[0010] (5) adding a flocculant to carry out a flocculation reaction;

[0011] (6) Perform sludge sedimentation and filter press treatment;

[0012] (7) Perform biochemical and aeration treatment;

[0013] (8) Sand filtration;

[0014] (9) Activated carbon filtration;

[0015] (10) The treated water obtained after the activated carbon filtration is disinfected and then filtered through a ceramic plate, and the filtered water is used for car washing; or the water filtered through the ceramic plate is introduced into a purification tank for purification and then used for car washing;

[0016] (11) The water purified in the purification tank is softened and then finely filtered, and the filtered water is used for car washing.

[0017] As a preferred embodiment of the present invention, the coagulant is aluminum sulfate; the flocculant is polyacrylamide; the disinfection treatment method in step (10) is: using a disinfection dosing machine to add disinfectant to the sewage entering the filter tank after sand filtration and activated carbon filtration for disinfection treatment; after adding reclaimed water to the filter tank, it is used as a water source for high-pressure car washing.

[0018] As a preferred embodiment of the present invention, the wastewater generated in steps (7)-(11) is returned to the sewage regulating tank in step (2) for repeated treatment and utilization.

[0019] As a preferred embodiment of the present invention, the fine filtration described in step (11) includes: filtering with a security filter and treating with a reverse osmosis membrane.

[0020] The present invention further provides a device for realizing the above-mentioned method for treating and comprehensively utilizing domestic sewage and car wash sewage, comprising:

[0021] A vehicle washing device installed on the ground, a device installed on the first underground floor, and a device installed on the second underground floor; wherein the device installed on the first underground floor includes: a sludge filter press, a mud cake processing device, a container for acid, an acid-base neutralizer, a container for alkali, a coagulant addition device, a flocculant addition device, a multifunctional water quality online analyzer, an activated carbon filter tank, and a sand filter tank;

[0022] The equipment set up on the second floor below ground includes: sewage regulating tank, acid-base neutralization tank, coagulation tank, flocculation tank, tertiary sedimentation tank, and biochemical aeration tank connected in sequence through pipelines;

[0023] The sewage regulating tank is provided with an inlet for introducing car wash water, washing water and rainwater; the washing water inlet is provided with a hair filter; an inclined tube sedimentation device is provided in the sewage regulating tank; a sludge filter press and a mud cake processing device are provided above the inclined tube sedimentation device; the inlet of the sludge filter press is connected to the tertiary sedimentation tank via a pipeline with a pump, one outlet of the sludge filter press is connected to the mud cake processing device, and another outlet of the sludge filter press is connected to a sewage inlet of the sewage regulating tank;

[0024] The container for holding acid, the acid-base neutralizer and the container for holding alkali are arranged above the acid-base neutralization tank and are all connected to the acid-base neutralization tank through pipelines;

[0025] The coagulant adding device is arranged above the coagulation tank and is connected to the coagulation tank through a pipeline;

[0026] The flocculant adding device is arranged above the flocculation tank and is connected to the flocculation tank through a pipeline;

[0027] The multifunctional water quality online analyzer is arranged above the biochemical aeration tank and is connected to the biochemical aeration tank;

[0028] The water inlet of the vehicle cleaning device is communicated with the water outlet of the sand filter tank.

[0029] As a preferred embodiment of the present invention, a ground panel is provided on the ground, an intermediate panel is provided between the first layer under the ground and the second layer under the ground; a ground entrance is provided at each of the front and rear ends of the ground panel.

[0030] As a preferred embodiment of the present invention, the three-stage sedimentation tank is located behind the flocculation tank and is composed of two partitions spaced apart at the lower part of a large tank. An outlet is provided on the top plate of the three-stage sedimentation tank, and a ladder is provided below the outlet.

[0031] As a preferred embodiment of the present invention, a biochemical treatment and aeration treatment device is provided in the biochemical pool.

[0032] As a preferred embodiment of the present invention, an inclined tube sedimentation device is provided on the right side of the sewage regulating tank, and an upper partition is provided on the left end of the inclined tube sedimentation device; a car wash water inlet and a rainwater inlet are provided on the left side wall of the sewage regulating tank; a sinking tank is provided at the bottom of the sewage regulating tank; a first conducting pipe is provided at the upper part between the acid-base neutralization tank, the coagulation tank, the flocculation tank and the tertiary sedimentation tank; and a stirrer is installed in each of the acid-base neutralization tank, the coagulation tank and the flocculation tank.

[0033] The inlet of the hair filter is passed through the wall through a washing water inlet pipe for introducing washing water, and the outlet of the hair filter is introduced into the sewage regulating tank through a pipe; the entrance and exit of the sewage regulating tank is provided on the top plate of the sewage regulating tank, and a ladder is provided below it; on the right side of the entrance and exit of the sewage regulating tank on the upper level, a sludge filter press device, a mud cake processing device, a container for containing acid, an acid-base neutralizer, a container for containing alkali, a coagulant adding device and a flocculant adding device are provided in sequence.

[0034] As a preferred embodiment of the present invention, a sinking trough is provided at the bottom of the three-stage sedimentation tank; a biochemical aeration tank is provided on the right side of the three-stage sedimentation tank, and a second conducting pipe is provided at the lower part of the wall between the two; an entrance and exit and a ladder are provided at the top of the biochemical aeration tank, and a sinking trough is provided at the bottom; a biochemical treatment and aeration device is provided at the bottom of the biochemical aeration tank, and the biochemical treatment and aeration device is connected to the air outlet of an air compressor provided on the upper layer; and a filter tank is provided on the right side of the biochemical aeration tank.

[0035] As a preferred embodiment of the present invention, the device on the first underground floor also includes a disinfectant dosing machine, a ceramic plate filter device, a water softening processor, a softened water tank for holding softened water, a security filter, and a reverse osmosis water processor; the device on the second underground floor also includes a filter tank, a purification tank, and a water pool. The upper part of the partition wall between the three is respectively provided with a third conducting pipe connecting the filter tank and the purification tank, and a fourth conducting pipe connecting the purification tank and the water pool. The top plates of the three are provided with entrances and exits and ladders, and the bottom is provided with a sinking tank;

[0036] Among them, the disinfection dosing machine, the ceramic plate filter device and the water softening processor are arranged above the filter pool, and the disinfection dosing machine and the ceramic plate filter device are connected to the filter pool; the softened water tank after the softening treatment and the safety filter are arranged above the purification pool;

[0037] The reverse osmosis water processor is set above the pool;

[0038] A water softening processor is installed in the purification pool. The water softening processor is connected to the softened water tank through a pipe. The softened water tank is connected to the security filter through a pipe. The security filter is connected to the reverse osmosis water processor through a pipe. The reverse osmosis water processor is connected to the water pool through a pipe.

[0039] As a preferred embodiment of the present invention, two groups of ceramic plate filtering devices are provided in the filter tank, one water outlet of the filter tank is connected to the water inlet of the vehicle washing device; one water outlet of the softening water tank is connected to the water inlet of the vehicle washing device; and one water outlet of the purification tank is connected to the water inlet of the vehicle washing device.

[0040] As a preferred embodiment of the present invention, a water outlet of the water pool is connected to a water inlet of a vehicle washing device arranged on the ground; the vehicle washing device on the ground is provided with a wastewater collection pipe, which is connected to the filter tank.

[0041] As a preferred embodiment of the present invention, the sewage outlet of the sludge filter press equipment is connected to a water inlet of the sewage regulating tank.

[0042] The main advantages of this invention include: it utilizes the characteristics of car wash water at different stages of wastewater treatment, reuses the wastewater after car washes, has a reasonable equipment layout, a compact structure, and reduces investment and operating costs. It is easy to operate and manage, has simple technical requirements, and achieves maximum automation control. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a process flow chart of the present invention;

[0044] Figure 2 It is a block diagram of the overall structure of the device of the present invention;

[0045] Figure 3 The left section of the overall structural diagram of an embodiment of the invention device.

[0046] Figure 4 It is the middle section of the overall structural diagram of an embodiment of the device of the present invention.

[0047] Figure 5 It is the right section of the overall structural diagram of an embodiment of the device of the present invention.

[0048] Explanation of the accompanying symbols: 1. Ground, 2. Middle plate (bottom plate of the first underground floor, also the top plate of the second underground floor), 3. Entrance and exit of the sewage regulating tank, 4. Hair filter, 5. Washing water inlet, 6. Car wash water inlet, 7. Rainwater inlet, 8. Sewage regulating tank, 9. Ground entrance and exit, 10. Sludge filter press equipment, 11. Ground panel, 12. Mud cake processing equipment, 13. Container for acid, 14. Acid-base neutralizer, 15. Container for alkali, 16. Coagulant adding device, 17. Flocculant adding device, 18. First conducting pipe, 19. Tertiary sedimentation tank, 20. Inclined tube sedimentation device, 21. Agitator in the acid-base neutralization tank, 22. Acid-base neutralization tank, 23. Agitator in the coagulation tank, 24. Coagulation tank, 25. Agitator of the flocculation tank, 26. Flocculation tank, 27. Ladder , 28. Sinking trough, 29. (Three-stage sedimentation tank) entrance and exit, 30. Air compressor, 31. Multifunctional water quality online analyzer, 32. Activated carbon filter tank, 33. Sand filter tank, 34. Disinfection and dosing machine, 35. Lower partition, 36. Second conducting pipe, 37. Biochemical aeration tank, 38. Conducting pipe connecting the three-stage sedimentation tank and the biochemical tank, 39. Filter tank, 40. Ceramic plate filter device on the upper layer of filter tank 39, 41. Water softening processor, 42. Softened water tank, 43. Security filter, 44. Reverse osmosis (RO) water processor, 45. Third conducting pipe connecting filter tank and purification tank, 46. Purification tank, 47. Water tank, 48. Upper partition, 49. Fourth conducting pipe connecting purification tank and water tank, 50. Two sets of ceramic plate filter devices arranged in filter tank 39. DETAILED DESCRIPTION

[0049] The present invention provides a device for treating and comprehensively utilizing domestic sewage and car wash sewage, the basic components of which are as follows: Figure 2 As shown, including: its basic composition is as follows Figure 2 As shown, it includes: a vehicle washing device arranged on the ground, a device arranged on the first floor below the ground, and a device arranged on the second floor below the ground; wherein the device arranged on the first floor below the ground includes: a sludge filter press 10, a mud cake processing device 12, a container for holding acid 13, an acid-base neutralizer 14, a container for holding alkali 15, a coagulant adding device 16, a flocculant adding device 17, a multifunctional water quality online analyzer 31, an activated carbon filter tank 32, and a sand filter tank 33;

[0050] The equipment arranged on the second floor below the ground includes: a sewage regulating tank 8, an acid-base neutralization tank 22, a coagulation tank 24, a flocculation tank 26, a tertiary sedimentation tank 19, and a biochemical aeration tank 37, which are connected in sequence through pipelines;

[0051] The sewage regulating tank 8 is provided with an inlet for introducing car wash water, washing water, and rainwater; the washing water inlet is provided with a hair filter 4; an inclined tube sedimentation device 20 is provided in the sewage regulating tank 8; a sludge filter press 10 and a mud cake processing device 12 are provided above the inclined tube sedimentation device 20; the inlet of the sludge filter press 10 is connected to the tertiary sedimentation tank 19 via a pipeline with a pump, one outlet of the sludge filter press 10 is connected to the mud cake processing device 12, and the other outlet of the sludge filter press 10 is connected to a sewage inlet of the sewage regulating tank 8;

[0052] The acid container 13, the acid-base neutralizer 14, and the alkali container 15 are arranged above the acid-base neutralization tank 22 and are all connected to the acid-base neutralization tank 22 through pipelines; the coagulant addition device 16 is arranged above the coagulation tank 24 and is connected to the coagulation tank 24 through pipelines; the flocculant addition device 17 is arranged above the flocculation tank 26 and is connected to the flocculation tank 26 through pipelines;

[0053] The multifunctional water quality online analyzer 31 is arranged above the biochemical aeration tank 37 and is connected to the biochemical aeration tank 37 through a detection line;

[0054] The water inlet of the vehicle cleaning device is communicated with the water outlet of the sand filter tank 33 .

[0055] The specific structure of an embodiment of the device for treating and comprehensively utilizing domestic sewage and car wash sewage of the present invention is as follows: Figure 3-Figure 5As shown, all equipment and structures are housed within a two-story space below ground level 1. Ground level 1 is provided with a floor panel 11. Between the first and second underground levels (hereinafter referred to as the upper and lower levels) lies an intermediate panel 2 (also serving as the ceiling of the second underground level). Beneath intermediate panel 2 are various troughs or pools (described in detail below). A ground entrance 9 is located at each of the front and rear ends of floor panel 11 (corresponding to the left and right sides in the figure) for the entry and exit of personnel and equipment.

[0056] See also Figure 3 The lower layer of the left (front) section of the device of the present invention is provided with a sewage regulating tank 8, an acid-base neutralization tank 22, a coagulation tank 24, a flocculation tank 26, and a tertiary sedimentation tank 19, from left to right. An inclined tube sedimentation device 20 is provided on the right side of the sewage regulating tank 8. The left end of the inclined tube sedimentation device 20 is provided with an upper partition 48. Sewage flows from below the upper partition 48 into the inclined tube sedimentation device 20, passes through the inclined tube sedimentation device 20 for preliminary sedimentation, and then flows out from above. It enters the acid-base neutralization tank 22 through the conducting pipe 18 on the upper part of the right tank wall. A car wash water inlet 6 and a rainwater inlet 7 are provided on the left side wall of the sewage regulating tank 8; a sinking trough 28 is provided at the bottom of the sewage regulating tank 8 for sedimentation and cleaning. A first conducting pipe 18 is provided at the upper part between the acid-base neutralization tank 22, the coagulation tank 24, the flocculation tank 26 and the tertiary sedimentation tank 19 to connect these devices; agitators 21, 23 and 25 are respectively installed in the acid-base neutralization tank 22, the coagulation tank 24 and the flocculation tank 26.

[0057] exist Figure 3 A hair filter 4 is provided at the left end of the upper middle layer. The inlet of the hair filter 4 passes through the wall through a wash water inlet (pipe) 5 for introducing wash water, and the outlet of the hair filter 4 is introduced into the sewage regulating tank 8 through a pipe. The sewage regulating tank entrance and exit 3 is provided on the top plate (middle plate 2) of the sewage regulating tank 8, and a ladder 27 is provided below it. To the right of the entrance and exit 3 of the upper sewage regulating tank are provided a sludge filter press 10, a mud cake processing device 12, an acid container 13, an acid-base neutralizer 14, an alkali container 15, a coagulant addition device 16, and a flocculant addition device 17. The acid-base neutralization device (acid container 13, acid-base neutralizer 14, alkali container 15) is located above the acid-base neutralization tank 22, and the coagulant addition device 16 and the flocculant addition device 17 are located above the coagulation tank 24 and the flocculation tank 26, respectively.

[0058] See also Figure 4 The lower layer of the middle section of the device of the present invention is provided with a three-stage sedimentation tank 19, a biochemical aeration tank 37 and a filter tank 39 from left to right.

[0059] Among them, the tertiary sedimentation tank 19 is located on the rear (right) side of the flocculation tank 26, and is composed of two lower partitions 35 spaced apart at the lower part of a large tank. An entrance and exit 29 is provided on the top plate (middle plate 2) of the tertiary sedimentation tank 19, and a ladder 27 is provided below the entrance and exit 29. A sinking trough 28 is also provided at the bottom of the tertiary sedimentation tank 19.

[0060] A biochemical aeration tank 37 is located next to the right side of the tertiary sedimentation tank 19. A second connecting pipe 36 is located below the wall separating the two. The top of the biochemical aeration tank 37 is also equipped with an entrance and exit, a ladder 27, and a sink 28 at the bottom. A biochemical treatment aeration device (not shown, purchased from Zhucheng Jinlong Machinery Manufacturing Co., Ltd., trade name: Sewage Biochemical Treatment Aeration Device) is located at the bottom of the biochemical aeration tank 37. This biochemical treatment aeration device is connected to the outlet of an air compressor 30 located on the upper level. A multifunctional online water quality analyzer 31 is also located on the upper level to monitor water quality and control the various treatment devices based on the monitoring data (the control method is conventional).

[0061] On the right side of the biochemical aeration tank 37 is a filter tank 39. A ceramic plate filter device 40 is provided on the upper layer of the filter tank 39. Two groups of ceramic plate filter devices 50 are provided in the filter tank 39 (a fence grille (not shown) is provided in the filter tank 39. The two groups of ceramic plate filter devices 50 in the filter tank 39 are inserted into fixed positions of the fence grille at a distance of one meter to form two filter dams. The water is filtered through the drainage filtration principle). The ceramic plate filter device 40 is connected to the two groups of ceramic plate filter devices 50 in the filter tank 39. The water filtered by the two groups of ceramic plate filter devices 50 in the filter tank 39 is then filtered through the ceramic plate filter device 40.

[0062] An activated carbon filter tank 32 and two (connected in series or in parallel) sand filter tanks 33 (purchased from Shenzhen Qingyuan Environmental Protection Technology Co., Ltd., trade name: fiberglass sand filter tanks) are located in the upper layer of the biochemical aeration tank 37. These filter the wastewater, which first flows through the two sand filter tanks 33 and then through the activated carbon filter tanks 32. A disinfectant dosing machine 34 is located to the right of the two sand filter tanks 33 to add sodium hypochlorite to the filter tank 39 for disinfection. The amount of sodium hypochlorite added is automatically controlled based on water quality (conventional technology).

[0063] See also Figure 5 The lower structure of the right section of the device of the present invention: on the right side of the filter tank 39, there are a purification tank 46 and a water tank 47 in sequence. The upper part of the partition wall between the three is respectively provided with a third conducting pipe 45 connecting the filter tank and the purification tank and a fourth conducting pipe 49 connecting the purification tank and the water tank. The top plates (middle plate 2) of the three are provided with entrances and exits and ladders 27, and the bottom is provided with a sinking trough 28.

[0064] On the upper level of the right section, to the right of the disinfection and dosing machine 34 is the ceramic plate filter device 40 (located above the filter tank 39), and to the right of the ceramic plate filter device 40 are sequentially provided with a water softening processor 41 (purchased from Qingzhou Zhongzhou Light Industry Machinery Factory, trade name: softened water equipment), a softened water tank 42 for holding softened treated water, a safety filter 43 (purchased from Xinxiang Stepu Filtration Equipment Co., Ltd., trade name: large flow safety filter) and a reverse osmosis (RO) water processor 44 (purchased from Qingzhou Sany Water Purification Technology Co., Ltd., trade name: RO reverse osmosis water purifier).

[0065] The following combination Figure 3-Figure 5 The working process of the present invention (the method for treating and comprehensively utilizing domestic sewage and car wash sewage of the present invention) is described as follows:

[0066] (1) Washing water, rainwater and car wash water are introduced into the sewage regulating tank 8 through the washing water inlet 5, rainwater inlet 7 and car wash water inlet 6 respectively; the washing water needs to pass through the hair filter 4 to filter the hair in the sewage.

[0067] (2) The sewage in the sewage regulating tank 8 is initially precipitated using the inclined tube sedimentation device 20 .

[0068] (3) The sewage after the initial precipitation is introduced into the acid-base neutralization tank 22 for pH neutralization treatment. The specific treatment method is: the sewage in the sewage regulating tank 8 flows into the acid-base neutralization tank 22 through the first conducting pipe 18, and the acid and alkali in the container 13 containing acid and the container 15 containing alkali are added into the acid-base neutralization tank 22 according to the set pH value by the acid-base neutralizer 14 and are fully stirred by the stirrer 21 in the acid-base neutralization tank 22 to complete the acid-base neutralization treatment.

[0069] (4) Coagulation reaction: The sewage after pH neutralization treatment flows from the first conducting pipe 18 on the right side of the acid-base neutralization tank 22 into the coagulation tank 24 next door. A conventional dose of coagulant aluminum sulfate is added to the coagulation tank 24 using the coagulant adding device 16, and the sewage is fully stirred by the agitator 23 in the coagulation tank 24 to allow the sewage to fully react with the coagulant to exert a coagulation effect.

[0070] (5) Flocculation reaction: The sewage after the coagulation reaction flows into the flocculation tank 26 next door. A proper amount of flocculant polyacrylamide is added into the flocculation tank 26 by the flocculant adding device 17, and the agitator 25 in the flocculation tank 26 is used to fully stir the sewage so that the sewage and the flocculant fully react to exert the flocculation effect.

[0071] (6) Sludge sedimentation and filter press treatment: After the flocculation reaction, the first conducting pipe 18 on the upper part of the right side wall of the flocculation tank 26 flows into the third sedimentation tank 19 on the right side of the adjacent wall. The sewage flows from left to right through the top of the two lower partitions 35 for three-stage sedimentation. The precipitated sludge is transported to the sludge filter press equipment 10 on the upper layer by a sludge pump (not shown) for filter press. The pressed sewage is returned to the sewage regulating tank 8. The mud cake after filter press is processed by the mud cake processing equipment 12 (transported out as fertilizer or planting soil).

[0072] (7) Biochemical and aeration treatment: The sewage after sedimentation in the tertiary sedimentation tank 19 flows into the biochemical aeration tank 37 on the right side thereof for biochemical treatment and aeration treatment (a biochemical treatment and aeration treatment device is provided in the biochemical aeration tank 37), and the water quality of the sewage after biochemical and aeration treatment is tested using a multifunctional water quality online analyzer 31 provided on the bottom plate.

[0073] (8) Sand filtration and activated carbon filtration: The sewage from the biochemical aeration tank 37, after biochemical and aeration treatment, enters the activated carbon filter tank 32 through a pipeline. After being treated in the activated carbon filter tank 32, it enters the two sand filter tanks 33 for physical degradation treatment. Finally, it is softened and used for vehicle washing. The washed sewage is discharged back into the filter tank 39.

[0074] (9) Disinfection treatment and high-pressure car washing. The specific method is: use a disinfectant dosing machine 34 to add disinfectant (sodium hypochlorite) to the sewage that enters the filter tank 39 after sand filtration and activated carbon filtration for disinfection treatment; and add an appropriate amount of reclaimed water to the filter tank 39 to use as a water source for high-pressure car washing.

[0075] (10) Ceramic plate filtration: The sewage is further filtered using two sets of ceramic plate filtration devices 50 located in the filter tank 39 and a ceramic plate filtration device 40 located on the filter tank 39.

[0076] (11) Purification in the purification tank and subsequent car washing: The sewage filtered by the filter tank 39 flows into the purification tank 46 from the third conducting pipe 45 connecting the filter tank and the purification tank on the upper part of the right side wall (the purification tank 46 is mainly used for secondary sedimentation purification of the filtered water).

[0077] (12) Softening treatment and use for car waxing and washing: The water in the purification tank 46 is softened by the water softening processor 41 (the water softening processor 41 is connected to the purification tank 46 through a connecting pipe and a softening water tank 42, and the water quality is softened by automatic control of the equipment). The softened water is stored in the softening water tank 42 as water for car waxing and subsequent car washing.

[0078] (13) Fine filtration and car washing, wherein the fine filtration device includes a security filter 43 and a reverse osmosis (RO) water processor 44: first, the softened water is further treated in sequence by the security filter 43 and the reverse osmosis (RO) water processor 44, and the treated purified water is stored in a pool 47 for use in car washing (the softened water tank 42 is connected to the security filter 43 through a pipeline, the security filter 43 is further connected to the reverse osmosis (RO) water processor 44 through a pipeline, and the reverse osmosis (RO) water processor 44 is further connected to the pool 47 through a pipeline).

[0079] The wastewater generated in steps (7) to (13) is returned to the sewage regulating tank 8 in step (2) for repeated treatment and utilization.

Claims

1. A device for treating and comprehensively utilizing domestic sewage and car wash sewage, characterized in that: include: A vehicle washing device arranged on the ground, a device arranged on the first floor below the ground, and a device arranged on the second floor below the ground; wherein the device arranged on the first floor below the ground comprises: a sludge filter press device (10), a mud cake processing device (12), a container for containing acid (13), an acid-base neutralizer (14), a container for containing alkali (15), a coagulant adding device (16), a flocculant adding device (17), a multifunctional water quality online analyzer (31), an activated carbon filter tank (32), and a sand filter tank (33); The device arranged on the second floor below the ground includes: a sewage regulating tank (8), an acid-base neutralization tank (22), a coagulation tank (24), a flocculation tank (26), a tertiary sedimentation tank (19), and a biochemical aeration tank (37) connected in sequence through pipelines; The sewage regulating tank (8) is provided with an inlet for introducing car wash water, washing water and rain water; wherein the washing water inlet is provided with a hair filter (4); an inclined tube sedimentation device (20) is provided in the sewage regulating tank (8); a sludge filter press device (10) and a mud cake processing device (12) are provided above the inclined tube sedimentation device (20); the inlet of the sludge filter press device (10) is connected to the tertiary sedimentation tank (19) through a pipeline with a pump, one outlet of the sludge filter press device (10) is connected to the mud cake processing device (12), and the other outlet of the sludge filter press device (10) is connected to a sewage inlet of the sewage regulating tank (8); The container (13) for holding acid, the acid-base neutralizer (14) and the container (15) for holding alkali are arranged above the acid-base neutralization tank (22) and are all connected to the acid-base neutralization tank (22) through pipelines; The coagulant adding device (16) is arranged above the coagulation tank (24) and is connected to the coagulation tank (24) through a pipeline; The flocculant adding device (17) is arranged above the flocculation tank (26) and is connected to the flocculation tank (26) through a pipeline; The multifunctional water quality online analyzer (31) is arranged above the biochemical aeration tank (37) and is connected to the biochemical aeration tank (37); The water inlet of the vehicle cleaning device is communicated with the water outlet of the sand filter tank (33).

2. The device according to claim 1, wherein A ground panel (11) is provided on the ground, and an intermediate panel (2) is provided between the first floor and the second floor below the ground; a ground entrance (9) is provided at each of the front and rear ends of the ground panel (11); The three-stage sedimentation tank (19) is located behind the flocculation tank (26) and is composed of two partitions spaced apart at the lower part of a large tank. An outlet is provided on the top plate of the three-stage sedimentation tank (19) and a ladder is provided below the outlet. The sewage outlet of the sludge filter press equipment (10) is connected to a water inlet of the sewage regulating tank (8).

3. The device according to claim 1, wherein A biochemical treatment and aeration treatment device is provided in the biochemical aeration tank (37); an inclined tube sedimentation device (20) is provided on the right side of the sewage regulating tank (8), and an upper partition (48) is provided at the left end of the inclined tube sedimentation device (20); a car wash water inlet (6) and a rainwater inlet (7) are provided on the left side wall of the sewage regulating tank (8); a sinking trough (28) is provided at the bottom of the sewage regulating tank (8); a first conducting pipe (18) is provided at the upper part between the acid-base neutralization tank (22), the coagulation tank (24), the flocculation tank (26) and the tertiary sedimentation tank (19); and agitators (21, 23, 25) are respectively provided in the acid-base neutralization tank (22), the coagulation tank (24) and the flocculation tank (26); The inlet of the hair filter (4) is passed through a washing water inlet pipe through the wall for introducing washing water, and the outlet of the hair filter (4) is introduced into a sewage regulating tank (8) through a pipe; an inlet and outlet (3) of the sewage regulating tank is provided on the top plate of the sewage regulating tank (8), and a ladder (27) is provided below the inlet and outlet (3) of the sewage regulating tank; and a sludge filter press device (10), a mud cake processing device (12), a container for containing acid (13), an acid-base neutralizer (14), a container for containing alkali (15), a coagulant adding device (16), and a flocculant adding device (17) are provided in sequence on the right side of the inlet and outlet (3) of the sewage regulating tank on the upper layer.

4. The device according to claim 1, wherein A sinking trough (28) is provided at the bottom of the tertiary sedimentation tank (19); a biochemical aeration tank (37) is provided on the right side of the tertiary sedimentation tank (19), and a second conducting pipe (36) is provided at the lower part of the wall between the two; an entrance and exit and a ladder (27) are provided at the top of the biochemical aeration tank (37), and a sinking trough (28) is provided at the bottom; a biochemical treatment and aeration device is provided at the bottom of the biochemical aeration tank (37), and the biochemical treatment and aeration device is connected to the air outlet of an air compressor (30) provided on the upper layer; The filter tank (39) is located on the right side of the biochemical aeration tank (37).

5. The device according to claim 1, wherein The first layer of equipment below the ground also includes a disinfectant dosing machine (34), a ceramic plate filter device (40) on the upper layer of the filter pool (39), a water softening processor (41), a softened water tank (42) for storing softened water, a safety filter (43) and a reverse osmosis water processor (44); The second layer of equipment below ground level also includes a filter pool (39), a purification pool (46) and a water pool (47). The upper part of the partition wall between the three is provided with a third conducting pipe (45) connecting the filter pool and the purification pool, and a fourth conducting pipe (49) connecting the purification pool and the water pool. The top plates of the three are provided with entrances and exits and ladders (27), and the bottom is provided with a sinking trough (28); The disinfection dosing machine (34), the ceramic plate filter device (40) and the water softening processor (41) are arranged above the filter pool (39), and the disinfection dosing machine (34) and the ceramic plate filter device (40) are connected to the filter pool (39); A softened water tank (42) and a safety filter (43) for storing softened water are arranged above the purification tank (46); A reverse osmosis water processor (44) is arranged above the water pool (47); A water softening processor (41) is provided in the purification pool (46). The water softening processor (41) is connected to a softened water tank (42) via a pipeline. The softened water tank (42) is connected to a security filter (43) via a pipeline. The security filter (43) is connected to a reverse osmosis water processor (44) via a pipeline. The reverse osmosis water processor (44) is connected to a water pool (47) via a pipeline.

6. The device according to claim 5, characterized in that Two sets of ceramic plate filtering devices (50) are provided in the filtering pool (39); A water outlet of the filter tank (39) is connected to the water inlet of the vehicle cleaning device; a water outlet of the softening water tank is connected to the water inlet of the vehicle cleaning device; and a water outlet of the purification tank (46) is connected to the water inlet of the vehicle cleaning device.

7. The device according to claim 5, characterized in that A water outlet of the water pool (47) is connected to a water inlet of a vehicle cleaning device arranged on the ground; the vehicle cleaning device on the ground is provided with a wastewater collection pipe, and the wastewater collection pipe is connected to the filter pool (39).

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