Integrated reclaimed water recycling system for urban sewage recycling

Abstract

The utility model discloses an integrated reclaimed water recycling system for urban sewage recycling, and belongs to the field of reclaimed water treatment. The device comprises a container body, a pressure-stabilizing water supply and taking unit, a bag filter and an ultraviolet disinfection unit are arranged in the container body, the pressure-stabilizing water supply and taking unit comprises a water inlet pipe, a pump set, a pressure-stabilizing tank and a water outlet pipe, the water inlet pipe is communicated with the water outlet pipe through the pump set, and the water outlet pipe is communicated with the pressure-stabilizing tank. And the bag filter and the ultraviolet disinfection unit are sequentially arranged on a water outlet path of the water outlet pipe. According to the utility model, a one-stop integrated design is adopted, sewage can be effectively treated, resource utilization of urban sewage is realized, the overall occupied area is small, the operation energy consumption is saved, the investment cost is reduced, and the construction and the installation are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of reclaimed water treatment, and more specifically, to an integrated reclaimed water reuse system for urban sewage recycling Background Art

[0002] In recent years, the work of reclaimed water utilization has received high attention in the industry, and water treatment technologies have also been continuously improved. The tail water discharged from urban sewage treatment plants is characterized by large water volume and stable water quality, but it cannot be directly reused as urban miscellaneous water because its suspended solids, turbidity, Escherichia coli, etc. do not meet the standards. The traditional sand filtration process can effectively further remove suspended solids and turbidity, but it requires backwashing and regeneration, and there are problems such as high backwashing frequency, unqualified initial filtered water after washing, complex supporting backwashing facilities, high investment, and difficult operation and maintenance management; and currently, common water treatment systems in the industry generally have a large floor area and high equipment investment. To promote the realization of a new situation of national sewage resource utilization, it is necessary to provide an integrated reclaimed water reuse system.

[0003] For example, the patent with the publication number CN214829667U provides a container with sewage treatment functions. Inside the container, there are a feeding chamber, a purification chamber, and a sterilization chamber in sequence. The water conveying mechanism is used to convey sewage from the purification chamber to the sterilization chamber; the purification chamber is provided with a filter screen, a stirring unit, and a disinfection unit; this design purifies sewage by sequentially performing solid-liquid separation, drug purification, and ultraviolet sterilization. The patent with the publication number CN208648958U provides a container-type sewage treatment tank. Inside the container, there are a sewage collection tank, a first sewage treatment tank, and a second sewage treatment tank, which can filter and sterilize sewage and can be randomly moved to the sewage treatment location, which is convenient and flexible. The above designs all use the container form for sewage treatment, which has certain optimization in terms of floor area and investment cost, but there is still room for further improvement. Summary of the Utility Model

[0004] 1. Technical problems to be solved by the utility model

[0005] In view of the general complex structure and high equipment investment of sewage treatment facilities in the prior art, the utility model intends to provide an integrated reclaimed water reuse system for urban sewage recycling, which adopts an integrated design and can effectively treat sewage and reuse it as reclaimed water for urban greening, road cleaning, building construction, vehicle washing, etc., realizing the resource utilization of urban sewage, and the overall occupied area is limited and the investment cost is reduced.

[0006] 2. Technical solutions

[0007] To achieve the above purpose, the technical solution provided by the utility model is as follows:

[0008] An integrated intermediate water reuse system for urban sewage recycling and utilization of the present utility model includes a container body. Inside the container body, there are a pressure stabilizing water supply and intake unit, a bag filter, and an ultraviolet disinfection unit. The pressure stabilizing water supply and intake unit includes an inlet pipe, a pump group, a pressure stabilizing tank, and an outlet pipe. The inlet pipe is connected to the outlet pipe through the pump group, and the outlet pipe is connected to the pressure stabilizing tank. The bag filter and the ultraviolet disinfection unit are sequentially arranged on the water outlet path of the outlet pipe.

[0009] Furthermore, a chlorine-assisted disinfection unit is also arranged inside the container body. The outlet of the chlorine-assisted disinfection unit is connected to the water outlet path of the outlet pipe and is located behind the ultraviolet disinfection unit.

[0010] Furthermore, multiple groups of pump groups are arranged inside the container body, and the multiple groups of pump groups are connected in parallel between the inlet pipe and the outlet pipe.

[0011] Furthermore, at least three groups of pump groups are arranged in parallel between the inlet pipe and the outlet pipe inside the container body.

[0012] Furthermore, the pump group adopts a vertical centrifugal pump or a submersible centrifugal pump; when the pump group adopts a vertical centrifugal pump, the pressure stabilizing water supply and intake unit further includes a negative pressure tank, and the negative pressure tank is arranged on the water inlet path of the inlet pipe and is located in front of the pump group.

[0013] Furthermore, the chlorine-assisted disinfection unit includes a sodium hypochlorite storage tank, a metering pump, and a pipe mixer. The sodium hypochlorite storage tank is used to add sodium hypochlorite into the pipe mixer, and the outlet of the pipe mixer is connected to the outlet pipe.

[0014] Furthermore, a pressure transmitter is also arranged on the water outlet path of the outlet pipe, and the pressure transmitter is located between the bag filter and the ultraviolet disinfection unit.

[0015] Furthermore, an intelligent water intake plug or a water crane is arranged at the outlet end of the outlet pipe, and an electromagnetic flowmeter is also arranged before the outlet end of the outlet pipe.

[0016] Furthermore, openings for personnel to enter and exit are respectively arranged at both ends in the length direction of the container body. The chlorine-assisted disinfection unit is arranged near one end of the container body, and the inlet of the inlet pipe and the outlet of the outlet pipe are arranged near the other end of the container body.

[0017] Furthermore, the surrounding wall surfaces of the container body are covered with a heat insulation layer, and a temperature regulator is also arranged inside the container body.

[0018] 3. Beneficial effects

[0019] Adopting the technical solution provided by the present utility model, compared with the prior art, it has the following beneficial effects:

[0020] (1) The integrated reclaimed water reuse system of the present utility model adopts a highly integrated one-stop design. The whole equipment uses a container structure, integrating water intake, treatment, and water supply. It is both a reclaimed water treatment device and a reclaimed water supply device. Only one pressurization is required to lift the raw water into the equipment. After the treatment meets the standards, it is directly transported to the water intake point without secondary lifting, achieving energy conservation and consumption reduction. There is no need to support a lifting pump pool either, saving investment and shortening the construction period.

[0021] (2) For the integrated reclaimed water reuse system of the present utility model, aiming at the characteristics that the suspended solids in the tail water of urban sewage treatment plants are not high but the direct reuse does not meet the standards, a bag filter is used to replace the traditional sand filtration process, eliminating the frequent and complex backwashing management such as water washing and air washing and the supporting backwashing equipment and facilities. It also avoids the problems that the wastewater generated by backwashing needs to be treated separately and the initial filtered water does not meet the standards after the backwashing ends. Only the filter bag needs to be replaced once every 2 - 3 months.

[0022] (3) The integrated reclaimed water reuse system of the present utility model adopts the combined use of ultraviolet and filtration disinfection, solving the problem that ultraviolet disinfection cannot completely kill Escherichia coli to reach the zero detection standard due to the residual turbidity in the effluent, and also solving the problems of large chemical dosage, large floor area of the disinfection tank, and high investment when using chlorine disinfection alone. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the integrated reclaimed water reuse system in the embodiment of the present utility model.

[0024] Explanation of the reference numerals in the schematic diagram:

[0025] 1. Container body; 2. Inlet pipe; 3-1. Negative pressure tank; 3-2 Pump group; 3-3. Pressure stabilizing tank; 4. Bag filter; 5. Ultraviolet disinfection unit; 6. Chlorine-assisted disinfection unit; 7. Electromagnetic flowmeter; 8. Outlet pipe; 9. Pressure transmitter; 10. Intelligent control unit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] To further understand the content of the present utility model, the present utility model will be described in detail in combination with the drawings.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] The present utility model will be further described below in conjunction with embodiments.

[0029] Embodiment

[0030] In conjunction with Figure 1 As shown, an integrated reclaimed water reuse system for urban sewage recycling in this embodiment includes a container body 1. Inside the container body 1, there are a pressure stabilizing water supply and intake unit, a bag filter 4, and an ultraviolet disinfection unit 5. The pressure stabilizing water supply and intake unit includes an inlet pipe 2, a pump group 3-2, a pressure stabilizing tank 3-3, and an outlet pipe 8. The inlet pipe 2 is connected to the outlet pipe 8 through the pump group 3-2, and the outlet pipe 8 is connected to the pressure stabilizing tank 3-3. The bag filter 4 and the ultraviolet disinfection unit 5 are sequentially arranged on the water outlet path of the outlet pipe 8.

[0031] This embodiment adopts a highly integrated one-stop design. The overall equipment adopts a container structure. All the functional equipment for the middle water treatment process flow is integrated inside the container body 1. The structure is concise, and the occupied space is small. Moreover, this equipment is both a water intake system for middle water treatment and a water supply system for reuse. With one-time pressurization, the raw water is lifted to the treatment facility, and after being treated up to the standard, it is directly transported to the water use point, realizing energy conservation and consumption reduction and reducing equipment investment.

[0032] In this embodiment, the effluent from the sewage treatment plant is lifted to the inside of the container body 1 through the inlet pipe 2. First, impurities are intercepted by the bag filter 4 to remove the solid suspended matter in the sewage, and then it enters the ultraviolet disinfection unit 5. Specifically, medium-pressure ultraviolet lamps can be used. Medium-pressure ultraviolet lamps can generate a wider ultraviolet spectrum, which can effectively avoid the photoreactivation and dark repair of DNA in microorganisms, thereby producing a permanent inactivation effect on microorganisms. In practice, the number and position of the operating lamp tubes of the medium-pressure ultraviolet lamps are automatically controlled according to the treated water volume, and it has an automatic hydraulic cleaning function and a delayed shutdown function. The effective ultraviolet dose ≥ 80 mJ / cm 2 . In this embodiment, the bag filter 4 is used for filtration. The sewage flows in from the inlet, flows out from the outlet after being filtered by the filter bag, and the impurities are intercepted in the filter bag. It can operate continuously for 24 hours, without energy consumption, without backwashing, and only the filter bag needs to be replaced regularly. The replacement period is 2 - 3 months, and the frequency is relatively low; and the filtration accuracy can reach 1 - 10 μm, and the effluent turbidity ≤ 5 NTU. It not only has a good filtration effect but also is easy to operate.

[0033] In order to further improve the sewage treatment effect, in some embodiments, a chlorine-assisted disinfection unit 6 is further provided in the container body 1, and the outlet of the chlorine-assisted disinfection unit 6 is connected to the water outlet path of the water outlet pipe 8 and is located after the ultraviolet disinfection unit 5. Specifically, the chlorine-assisted disinfection unit 6 includes a sodium hypochlorite storage tank, a metering pump and a pipeline mixer. The sodium hypochlorite storage tank is used to add sodium hypochlorite to the pipeline mixer, the metering pump is used to control the amount of addition, and the outlet of the pipeline mixer is connected to the water outlet pipe 8 through a pipeline. In practice, since there is inevitably residual turbidity in the filtered water, ultraviolet rays cannot irradiate the microorganisms such as bacteria and viruses contained therein, so it cannot be thoroughly disinfected. The chlorine-assisted disinfection system 6 can further kill residual microorganisms. The reclaimed water is first disinfected by medium-pressure ultraviolet rays and then by sodium hypochlorite. The combined disinfection of sodium hypochlorite disinfectant and ultraviolet rays effectively makes up for the defect that ultraviolet rays are affected by residual turbidity and the disinfection is not thorough. At the same time, it overcomes the shortcomings of long residence time required for sodium hypochlorite disinfection, large area of supporting disinfection pool, and large investment. Through trace addition and pipeline mixing, the goal of zero detection of Escherichia coli is achieved, so that the effluent meets the water quality requirements of urban miscellaneous water with zero detection of Escherichia coli.

[0034] In some embodiments, multiple pump groups 3-2 are provided inside the container body 1, and the multiple pump groups 3-2 are connected in parallel between the water inlet pipe 2 and the water outlet pipe 8. The multiple pump groups 3-2 can be used as standby replacements to prevent the system from shutting down due to an unexpected failure of a pump group 3-2. The settings of the multiple pump groups 3-2 can also be adjusted according to different water flow rates to meet usage requirements. Figure 1 Three pump groups 3-2 are arranged inside the middle container body 1 and connected in parallel between the water inlet pipe 2 and the water outlet pipe 8 for two uses and one backup. According to the water consumption, two pump groups 3-2 can be started at the same time when a large flow is required, and only one pump group 3-2 can be started when a small flow is required, which is more flexible in application.

[0035] In order to ensure the effect of stable pressure water supply and withdrawal in practice, a pressure-stabilizing tank 3-3 is provided in the present embodiment to ensure that the water pressure can remain stable at different water flow rates; in some embodiments, the pump group 3-2 can adopt a vertical centrifugal pump or a submersible centrifugal pump, and when the pump group 3-2 adopts a vertical centrifugal pump, the pressure-stabilizing water supply and withdrawal unit also includes a negative pressure tank 3-1, which is arranged on the water inlet path of the water inlet pipe 2 and is located before the pump group 3-2. The negative pressure tank 3-1 is used to prevent the problem of empty suction in the early stage of restarting the water inlet after the system is shut down, so as to ensure that the water can be directly sucked in.

[0036] In practice, a pressure transmitter 9 is further provided on the water outlet path of the water outlet pipe 8. The pressure transmitter 9 is located between the bag filter 4 and the ultraviolet disinfection unit 5. The outlet end of the water outlet pipe 8 is provided with an intelligent water hydrant or a water crane, and an electromagnetic flowmeter 7 is further provided before the outlet end of the water outlet pipe 8. An intelligent control unit 10 is further provided in the container body 1. Based on the monitoring data of the electromagnetic flowmeter 7 and the pressure transmitter 9, the intelligent control unit 10 intelligently controls the start-stop strategies of the pump group 3-2 and the medium-pressure ultraviolet lamp tubes, matches the demand for any water intake in real time, and simultaneously realizes voltage stabilization and energy conservation and consumption reduction.

[0037] In some embodiments, openings for personnel to enter and exit are respectively provided at both ends of the container body 1 in the length direction, facilitating entry for maintenance, etc.; the chlorine-assisted disinfection unit 6 is arranged near one end of the container body 1, and the inlet of the water inlet pipe 2 and the outlet of the water outlet pipe 8 are arranged near the other end of the container body 1. Further, the peripheral wall surfaces of the container body 1 are coated with a heat insulation layer, and a temperature regulator such as an air conditioner is further provided in the container body 1 to achieve constant temperature control.

[0038] The above schematically describes the present invention and its implementation manners. This description is not restrictive and is only one of the implementation manners of the present invention. In fact, it is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the creative purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. An integrated intermediate water reuse system for urban sewage recycling and utilization, comprising a container body (1), characterized in that: Inside the container body (1), there are a pressure-stabilized water supply and intake unit, a bag filter (4), and an ultraviolet disinfection unit (5). The pressure-stabilized water supply and intake unit includes an inlet pipe (2), a pump group (3-2), a pressure-stabilized tank (3-3), and an outlet pipe (8). The inlet pipe (2) is connected to the outlet pipe (8) through the pump group (3-2), the outlet pipe (8) is connected to the pressure-stabilized tank (3-3), and the bag filter (4) and the ultraviolet disinfection unit (5) are sequentially arranged on the water outlet path of the outlet pipe (8).

2. The integrated intermediate water reuse system for urban sewage recycling according to claim 1, characterized in that: Inside the container body (1), there is also a chlorine-assisted disinfection unit (6). The outlet of the chlorine-assisted disinfection unit (6) is connected to the water outlet path of the outlet pipe (8) and is located behind the ultraviolet disinfection unit (5).

3. An integrated intermediate water reuse system for urban sewage recycling according to claim 1, characterized in that: Inside the container body (1), there are multiple groups of pump groups (3-2) connected in parallel between the inlet pipe (2) and the outlet pipe (8).

4. An integrated intermediate water reuse system for urban sewage recycling and reuse according to claim 3, characterized in that: Inside the container body (1), there are at least three groups of pump groups (3-2) connected in parallel between the inlet pipe (2) and the outlet pipe (8).

5. An integrated intermediate water reuse system for urban sewage recycling and reuse according to any one of claims 1-4, characterized in that: The pump group (3-2) uses a vertical centrifugal pump or a submersible centrifugal pump; when the pump group (3-2) uses a vertical centrifugal pump, the pressure-stabilized water supply and intake unit also includes a negative pressure tank (3-1). The negative pressure tank (3-1) is arranged on the water inlet path of the inlet pipe (2) and is located before the pump group (3-2).

6. An integrated intermediate water reuse system for urban sewage reclamation and reuse according to claim 2, characterized in that: The chlorine-assisted disinfection unit (6) includes a sodium hypochlorite storage tank, a metering pump, and a pipe mixer. The sodium hypochlorite storage tank is used to add sodium hypochlorite into the pipe mixer, and the outlet of the pipe mixer is connected to the outlet pipe (8).

7. An integrated intermediate water reuse system for urban sewage recycling and reuse according to claim 1, characterized in that: On the water outlet path of the outlet pipe (8), there is also a pressure transmitter (9), and the pressure transmitter (9) is located between the bag filter (4) and the ultraviolet disinfection unit (5).

8. An integrated intermediate water reuse system for urban sewage recycling and utilization according to claim 1, characterized in that: The outlet end of the outlet pipe (8) is provided with an intelligent water intake faucet or a water crane, and an electromagnetic flowmeter (7) is also provided before the outlet end of the outlet pipe (8).

9. An integrated intermediate water reuse system for urban sewage reclamation and reuse according to claim 2 or 6, characterized in that: Openings for personnel to enter and exit are respectively provided at both ends of the container body (1) in the length direction. The chlorine-assisted disinfection unit (6) is arranged near one end of the container body (1), and the inlet of the inlet pipe (2) and the outlet of the outlet pipe (8) are arranged near the other end of the container body (1).

10. An integrated intermediate water reuse system for urban sewage recycling according to any one of claims 1-4, characterized in that: The peripheral wall surfaces of the container body (1) are covered with a heat insulation layer, and a temperature regulator is also provided inside the container body (1).

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