Fabricated rural sewage treatment device

Abstract

The invention relates to the technical field of sewage treatment, in particular to an assembly type rural sewage treatment device which comprises a treatment unit, a connecting part, external equipment, a precipitation and disinfection unit, an inner backflow pipe and an outer backflow pipe. The treatment unit comprises a box body, an aeration pipe opening and a sewage pipe plug; and the outer surface of the box body is communicated with a flange. The invention solves the problems that the daily inflow is far smaller than the design scale, the long-term low-load operation is realized, the sewage quantity is suddenly increased during festivals and holidays, the overload operation exists, both the long-term low-load operation and the long-term low-load operation are not beneficial to the stable operation of a sewage treatment system, and the effluent quality cannot be effectively ensured to reach the standard. In the operation stage, the number of treatment units and the technological process can be adjusted in advance according to the water consumption so as to adapt to the dramatic change of the sewage amount during holidays and festivals, operation under unconventional working conditions is prevented, and it is guaranteed that the effluent quality reaches the standard.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an assembled rural sewage treatment device. Background Art

[0002] At present, rural sewage is mostly treated by integrated sewage treatment facilities, which have the advantages of high integration, convenient installation and construction, and small footprint. However, the rural population is small on weekdays, and most of them are elderly people. In addition, part of the sewage is used as fertilizer in agricultural production, so the amount of sewage on weekdays is small. However, the number of people returning home to visit relatives during holidays increases dramatically, resulting in drastic changes in the amount of sewage. Affected by the above-mentioned changes in the number of rural residents and the living habits of the permanent population, it is extremely difficult to accurately estimate the design scale. Taking the maximum daily sewage volume as the design scale, the rural sewage treatment facilities will have a problem that the water inflow on weekdays is far less than the design scale, and they will operate at low load for a long time. During holidays, the sewage volume will increase sharply, and there will be overload operation. Both are not conducive to the smooth operation of the sewage treatment system and cannot effectively ensure that the effluent water quality meets the standards. However, the integrated equipment cannot adjust the treatment scale through internal transformation. In order to solve the above problems, some sewage treatment facilities have taken measures such as supporting storage tanks, but the sewage accumulates in the anaerobic environment in the pool for a long time. After anaerobic reaction, the concentration of organic matter decreases, affecting the subsequent sewage treatment effect.

[0003] In order to solve the problem of large annual changes in water volume in rural sewage treatment and mismatch between design scale and actual water volume, it is necessary to transform the existing integrated sewage treatment facilities and invent a sewage treatment facility that is more suitable for the rural environment in order to further improve the stability of effluent compliance and ensure that the facilities operate under reasonable conditions. Summary of the invention

[0004] The purpose of the present invention is to provide an assembled rural sewage treatment device, which has the advantages of adapting to drastic changes in sewage volume, flexible installation and easy disassembly, and solves the problem that the water inlet on weekdays is far less than the design scale and operates at low load for a long time, and the sewage volume increases sharply during holidays, resulting in overload operation. Both are not conducive to the smooth operation of the sewage treatment system and cannot effectively ensure that the effluent water quality meets the standards.

[0005] According to a first aspect of the present invention, there is provided an assembled rural sewage treatment device, comprising a treatment unit, a connecting component, an external device and a sedimentation and disinfection unit, an internal return pipe and an external return pipe, the treatment unit comprising a box body, an aeration pipe outlet and a sewage pipe plug, an aeration pipe is arranged inside the box body, a flange is connected to the outer surface of the box body, a plurality of treatment units are connected by connecting components, the connecting components comprising an air pipe, a sewage connecting pipe, a support frame and a valve, the air pipe is connected to the aeration pipe through the aeration pipe outlet, the sewage connecting pipe is connected to the flange, the support frame connects the upper and lower boxes, the valve is installed on the surface of the air pipe, the external device comprises a blower, a dosing pump, an internal return pump and an external return pump, the air outlet end of the blower is connected to the aeration pipe outlet with an air pipe, the sedimentation and disinfection unit comprises a cabinet body, an inclined pipe and an ultraviolet disinfection unit, and a weir plate is arranged at the center of the inner cavity of the cabinet body.

[0006] Preferably, the box body is provided with hole one and hole two respectively cooperating with the sewage connecting pipe and the aeration pipe, and the flange is welded to the inner cavity of hole one with the flange facing outwards.

[0007] Preferably, the aeration pipe is made of PPR material and has air holes on its surface. The aeration pipes are connected to each other to form a cube and are arranged in the inner cavity of the box. The ends of the aeration pipes are connected to the holes on the surface of the box.

[0008] Preferably, the aeration pipe opening is welded to the second hole on the surface of the box body, with the threaded end facing outward, and the surface of the aeration pipe opening is threadedly connected to an air pipe plug.

[0009] Preferably, the number of the blower, dosing pump, internal reflux pump and external reflux pump are two, one for use and one for backup, and the input ends of the blower, dosing pump, internal reflux pump and external reflux pump are electrically connected to the PLC cabinet.

[0010] Preferably, the output end of the dosing pump is connected to a dosing pipe, and the dosing pipe is arranged between the last processing unit and the precipitation disinfection unit, and the input end of the dosing pump is connected to a dissolving drug cartridge.

[0011] Preferably, both ends of the internal reflux pump are connected to the upper and lower boxes respectively through an internal reflux pipe, with one end connected to the aerobic zone and the other end connected to the anoxic zone. The external reflux pump has one end of the external reflux pipe connected to the bottom of the sedimentation disinfection unit and the other end connected to the first treatment unit.

[0012] Preferably, the cabinet is divided into a sedimentation area and a disinfection area on the left and right by a weir plate, the inclined pipe is arranged on the upper bracket of the sedimentation area, the ultraviolet disinfection unit is arranged at the lower part of the disinfection area, and holes are reserved at the lower part of the sedimentation area on the surface of the cabinet.

[0013] The second aspect of the present invention provides a rural sewage treatment method, using any of the above-mentioned assembled rural sewage treatment devices, specifically comprising: S1. Determine the initial operating conditions: determine the volume of a single treatment unit, determine the initial operating conditions based on the sewage influent concentration and the average daily sewage flow rate, and determine the number of treatment units; S2. Connecting and assembling modules: according to the initial operating conditions, the processing unit, external equipment, and precipitation and disinfection unit are connected with connecting components, and debugging and trial operation are carried out after the connection is completed. After the debugging is completed, formal operation is started; S3. Adjust operating conditions: When the changes in the external water inlet flow rate do not meet the current scale, the units are reassembled according to the requirements of the operating conditions table for each stage. When the water inlet flow rate decreases, the connecting pipes are adjusted to reduce the number of treatment units; when the water inlet flow rate increases, the number of treatment units is increased, and brackets and connecting pipes are added.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention divides the sewage treatment facility into multiple treatment units. During the operation phase, the number of treatment units and the process flow can be adjusted in advance according to the water consumption to adapt to the dramatic changes in sewage volume during holidays and prevent operation under unconventional conditions to ensure that the effluent quality meets the standards; 2. Flexible installation and easy disassembly, high integration of treatment units, and prefabricated construction units, which are more efficient than conventional sewage treatment plant facilities; 3. During the operation stage, it can actively adapt to various water volumes to adjust the working conditions, effectively reduce the volume of the storage tank, reduce the area occupied by the treatment facilities, and save civil engineering investment; 4. Because the device is assembled from multiple processing units, it is easy to install and disassemble, and the speed is fast, which provides great possibilities for upgrading and scale adjustment in the near and long term.

[0015] 5. After the treatment units are split, they can be disassembled and repaired separately. If damaged, only the corresponding unit needs to be replaced to avoid major overhaul of the entire device. During the maintenance period, other treatment units can also be used to replace them, which improves the sewage treatment stability and safety of the facility. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 The plane of the precipitation disinfection unit of the present invention Figure 1 ; Figure 3 The plane of the precipitation disinfection unit of the present invention Figure 2 ; Figure 4 This is a schematic diagram of the structure of the processing unit of the present invention; Figure 5It is the internal structure diagram of the present invention; Figure 6 This is a schematic diagram of the tracheal plug of the present invention; Figure 7 This is a schematic diagram of a sewage pipe plug of the present invention; Figure 8 This is a schematic diagram of the sewage connecting pipe of the present invention; Fig. 9 It is a schematic diagram of the trachea of ​​the present invention; Fig.10 Schematic diagram of the support frame of the present invention.

[0017] In the above drawings: 1. treatment unit; 11. housing; 12. flange; 13. aeration pipe; 14. aeration pipe outlet; 15. air pipe plug; 16. sewage pipe plug; 2. connecting parts; 21. air pipe; 22. sewage connecting pipe; 23. support frame; 24. valve; 3. external equipment; 31. blower; 32. dosing pump; 33. internal reflux pump; 34. external reflux pump; 35. drug dissolving cartridge; 36. PLC cabinet; 4. sedimentation disinfection unit; 41. cabinet; 42. inclined pipe; 43. ultraviolet disinfection unit; 44. weir plate; 5. dosing pipe; 6. internal reflux pipe; 7. external reflux pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in 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.

[0019] See also Figure 1-Figure 10A prefabricated rural sewage treatment device includes a treatment unit 1, a connecting component 2, an external device 3 and a sedimentation and disinfection unit 4, an internal return pipe 6 and an external return pipe 7. The treatment unit 1 includes a box body 11, an aeration pipe port 14 and a sewage pipe plug 16. The sewage pipe plug 16 is used to close the flange 12 of the unconnected sewage connecting pipe 22, and is connected to the flange 12 by a flange plate, bolted, and a gasket is arranged in the middle to prevent water leakage. An aeration pipe 13 is arranged inside the box body 11, and the outer surface of the box body 11 is connected with the flange 12. Several treatment units 1 are connected by a connecting component 2. The connecting component 2 includes an air pipe 21, a sewage connecting pipe 22, a support frame 23 and a valve 24. The air pipe 21 and the aeration pipe 13 are connected by an aeration pipe 24. The air pipe 21 is connected to the air pipe port 14. To avoid corrosion in the air, the outer shell of the air pipe 21 is made of stainless steel, and the internal material is the same as the aeration pipe 13. The sewage connecting pipe 22 is connected to the flange 12. The support frame 23 connects the upper and lower boxes 11. The valve 24 is installed on the surface of the air pipe 21. The external equipment 3 includes a blower 31, a dosing pump 32, an internal reflux pump 33 and an external reflux pump 34. The air outlet end of the blower 31 is connected to the aeration pipe port 14 through the air pipe 21. The aeration pipe port 14 is made of stainless steel. The sedimentation and disinfection unit 4 includes a cabinet 41, an inclined pipe 42 and an ultraviolet disinfection unit 43. A weir plate 44 is arranged at the center of the inner cavity of the cabinet 41. The water discharged from the sedimentation area overflows over the weir plate 44 and flows into the disinfection area for ultraviolet disinfection. In some embodiments, see Figure 1 , Figure 4 and Figure 5 As shown, the box body 11 is provided with a hole 1 and a hole 2 respectively matched with the sewage connecting pipe 22 and the aeration pipe 13, and the flange 12 is welded to the inner cavity of the hole 1, with the flange facing outwards; In some embodiments, see Figure 1 , Figure 4 and Figure 5 As shown, the aeration pipe 13 is made of PPR material and has air holes on the surface. The aeration pipes 13 are connected to each other to form a cube and are arranged in the inner cavity of the box body 11. The aeration pipe 13 evenly distributes air to the sewage and is an air distribution component of the treatment unit 1. The end of the aeration pipe 13 is connected to the second hole on the surface of the box body 11; In some embodiments, see Figure 3 As shown, the aeration pipe port 14 is welded to the second hole on the surface of the box body 11, and the threaded end faces outward, and the surface of the aeration pipe port 14 is threadedly connected with an air pipe plug 15; In some embodiments, see Figure 2 and Figure 3 As shown, the number of the blower 31, the dosing pump 32, the internal reflux pump 33 and the external reflux pump 34 are all two, one for use and one for backup, and the input ends of the blower 31, the dosing pump 32, the internal reflux pump 33 and the external reflux pump 34 are all electrically connected to a PLC cabinet 36, and the PLC cabinet 36 integrates the PLCs of the above devices to achieve the functions of automatic control and data transmission; In some embodiments, see Figure 2 and Figure 3 As shown, the output end of the dosing pump 32 is connected to the dosing pipe 5, and the dosing pipe 5 is arranged between the last processing unit 1 and the precipitation disinfection unit 4, and the input end of the dosing pump 32 is connected to the dissolving cartridge 35; In some embodiments, see Figure 2 and Figure 3 As shown, both ends of the internal reflux pump 33 are connected to the upper and lower boxes 11 through the internal reflux pipe 6, and one end is connected to the aerobic zone and the other end is connected to the anoxic zone. The external reflux pump 34 is connected to the bottom of the sedimentation disinfection unit 4 through the external reflux pipe 7 at one end and the first treatment unit 1 at the other end; In some embodiments, see Figure 2 and Figure 3 As shown, the cabinet 41 is divided into a sedimentation area and a disinfection area on the left and right by a weir plate 44. The inclined pipe 42 is arranged on the upper bracket of the sedimentation area. The inclined pipe 42 is used to precipitate sludge. The ultraviolet disinfection unit 43 is arranged at the lower part of the disinfection area. The ultraviolet disinfection unit 43 is used for effluent disinfection. Holes are reserved at the lower part of the sedimentation area on the surface of the cabinet 41.

[0020] This embodiment provides an operation method of the assembled rural sewage treatment device described in the above embodiment, including: S1. Determine the initial operating conditions: The volume of a single treatment unit is fixed, and the initial operating conditions are determined according to the sewage inlet concentration and the average daily sewage flow rate. For example, the number of treatment units A is x1, of which a1 is interconnected for aeration as an aerobic section, a2 is interconnected for anoxic sections, and a3 is interconnected for anoxic sections, and the external equipment C and the sedimentation disinfection unit D are determined; S2. Determine the operating conditions of each stage: According to the changes in the annual sewage volume within the service area, determine each stage and its operating conditions, as shown in the following table:

[0021] S3. Connecting and assembling modules: According to the initial operating conditions, the processing unit A, the external device C, and the precipitation disinfection D are connected with the connecting components. After the connection is completed, debugging and trial operation are carried out. After the debugging is completed, formal operation is started; S4. Adjust operating conditions: When the external water flow rate changes and does not meet the current scale, reassemble the unit according to the operating conditions table of each stage. When the water flow rate decreases, adjust the connecting pipes and reduce the number of treatment units; when the water flow rate increases, increase the number of treatment units and add brackets and connecting pipes.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An assembled rural sewage treatment device, comprising a treatment unit (1), a connecting component (2), an external device (3), a sedimentation and disinfection unit (4), an internal return pipe (6) and an external return pipe (7), characterized in that: The treatment unit (1) comprises a housing (11), an aeration pipe opening (14) and a sewage pipe plug (16); an aeration pipe (13) is arranged inside the housing (11); the outer surface of the housing (11) is connected to a flange (12); a plurality of treatment units (1) are connected via a connecting component (2); the connecting component (2) comprises an air pipe (21), a sewage connecting pipe (22), a support frame (23) and a valve (24); the air pipe (21) is connected to the aeration pipe (13) via the aeration pipe opening (14); the sewage connecting pipe (22) is connected to the flange (12); (12), the support frame (23) connects the upper and lower boxes (11), the valve (24) is installed on the surface of the air pipe (21), the external equipment (3) includes a blower (31), a dosing pump (32), an internal reflux pump (33) and an external reflux pump (34), the air outlet end of the blower (31) is connected to the aeration pipe port (14) through the air pipe (21), the sedimentation disinfection unit (4) includes a cabinet (41), an inclined pipe (42) and an ultraviolet disinfection unit (43), and a weir plate (44) is arranged at the center of the inner cavity of the cabinet (41).

2. The assembled rural sewage treatment device according to claim 1 is characterized in that: The box body (11) is provided with a hole one and a hole two respectively cooperating with the sewage connecting pipe (22) and the aeration pipe (13); the flange (12) is welded to the inner cavity of the hole one, with the flange facing outwards.

3. The assembled rural sewage treatment device according to claim 2 is characterized in that: The aeration pipe (13) is made of PPR material and has air holes on its surface. The aeration pipes (13) are connected to each other to form a cube and are arranged in the inner cavity of the box (11). The ends of the aeration pipes (13) are connected to holes on the surface of the box (11).

4. The assembled rural sewage treatment device according to claim 2 is characterized in that: The aeration pipe opening (14) is welded to the second hole on the surface of the box body (11), with the threaded end facing outwards; the surface of the aeration pipe opening (14) is threadedly connected to an air pipe plug (15).

5. The assembled rural sewage treatment device according to claim 1 is characterized by: The number of the blower (31), the dosing pump (32), the internal reflux pump (33) and the external reflux pump (34) is two, one for use and one for backup. The input ends of the blower (31), the dosing pump (32), the internal reflux pump (33) and the external reflux pump (34) are all electrically connected to a PLC cabinet (36).

6. The assembled rural sewage treatment device according to claim 1 is characterized by: The output end of the dosing pump (32) is connected to a dosing pipe (5), and the dosing pipe (5) is arranged between the last processing unit (1) and the precipitation disinfection unit (4). The input end of the dosing pump (32) is connected to a dissolving cartridge (35).

7. The assembled rural sewage treatment device according to claim 1 is characterized by: Both ends of the internal reflux pump (33) are connected to the upper and lower boxes (11) respectively through the internal reflux pipe (6), and one end is connected to the aerobic zone and the other end is connected to the anoxic zone. The external reflux pump (34) is connected to the bottom of the sedimentation disinfection unit (4) through the external reflux pipe (7) at one end and to the first treatment unit (1) at the other end.

8. The assembled rural sewage treatment device according to claim 1 is characterized by: The cabinet (41) is divided into a sedimentation area and a disinfection area on the left and right by a weir plate (44); the inclined pipe (42) is arranged on an upper bracket of the sedimentation area; the ultraviolet disinfection unit (43) is arranged at the lower part of the disinfection area; and a hole is reserved at the lower part of the sedimentation area on the surface of the cabinet (41).

9. A method for treating rural sewage, characterized in that: An assembled rural sewage treatment device according to any one of claims 1 to 8 is used, specifically comprising: S1. Determine the initial operating conditions: determine the volume of a single treatment unit, determine the initial operating conditions based on the sewage influent concentration and the average daily sewage flow rate, and determine the number of treatment units; S2. Connecting and assembling modules: according to the initial operating conditions, the processing unit, external equipment, and precipitation and disinfection unit are connected with connecting components, and debugging and trial operation are carried out after the connection is completed. After the debugging is completed, formal operation is started; S3. Adjust operating conditions: When the changes in the external water inlet flow rate do not meet the current scale, the units are reassembled according to the requirements of the operating conditions table for each stage. When the water inlet flow rate decreases, the connecting pipes are adjusted to reduce the number of treatment units; when the water inlet flow rate increases, the number of treatment units is increased, and brackets and connecting pipes are added.

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