Sewage waste liquid decrement recycling system

Abstract

The utility model discloses a sewage waste liquid decrement recycling system and belongs to the technical field of sewage treatment. In the system, a water inlet well is connected to inlets of a pipeline mixer and a grit chamber through a lifting pump after passing through a filter grid; one outlet of the grit chamber is connected to the biochemical system, and the other outlet of the grit chamber is sequentially connected with the reduction system and the recycling system. The reduction system comprises a heat exchanger, an evaporator and a supercharger which are sequentially connected, and an ultrafiltration membrane and a reverse osmosis membrane are arranged in the recycling system. The lifting pump is connected with the grit chamber through a pipeline mixer, a flocculating agent is added to assist precipitation, sewage subjected to primary precipitation enters the reduction system to be subjected to reduction treatment, treated water is treated by the recycling system to reach the recycling standard, concentrated water generated by the reduction system and the recycling system is discharged into the water inlet well to be mixed with newly entering sewage, and the sewage is discharged into the water inlet well. And after mixing, the process is cycled. The system has the advantages of simplicity in operation, labor cost saving, good treatment effect and the like.

Description

Technical Field

[0001] The utility model relates to a sewage and waste liquid reduction and reuse system, belonging to the technical field of sewage treatment. Background Art

[0002] Currently, sewage treatment plants face challenges such as complex influent composition, numerous difficult-to-treat components, and excessive water volume. These plants typically rely on large amounts of chemical dosing and increased inspections to ensure compliance with discharge standards. This results in increased operating costs and the risk of exceeding standards. To address this, we have designed a wastewater and liquid waste reduction and reuse system to address the overload in the primary biochemical treatment phase of sewage treatment plants. This system also generates recycled water, directly or indirectly increasing sewage treatment plant revenue. Utility Model Content

[0003] In order to solve the problems existing in the prior art, the utility model provides a sewage and waste liquid reduction and reuse system. Part of the sewage from the sewage treatment plant flows into the reduction system and the reuse system to share the pressure of the biochemical system, thereby reducing sewage at the source, shortening the sewage treatment time, saving labor costs, and realizing the reuse of water resources, saving fresh water resources.

[0004] The technical solution adopted by the utility model is: a sewage and waste liquid reduction and reuse system, which includes an inlet well and a biochemical system. The inlet well is connected to the inlet of a pipeline mixer and a grit chamber by a lifting pump after passing through a filter grid; one outlet of the grit chamber is connected to the biochemical system by a pipeline, and the other outlet is connected to the reduction system and the reuse system by pipelines in sequence;

[0005] The reduction system includes a heat exchanger, an evaporator and a booster connected in sequence, and the reuse system is provided with an ultrafiltration membrane and a reverse osmosis membrane;

[0006] The system also includes a dosing tank, the liquid outlet of which is connected to the pipeline at the water inlet end of the pipeline mixer.

[0007] Furthermore, a concentrated liquid outlet is provided at the bottom of the evaporator.

[0008] Furthermore, the concentrate outlet has a concentrate return pipe connected back to the water inlet of the water inlet well.

[0009] The beneficial effects of the present invention are as follows: the sewage and waste liquid reduction and reuse system can resist the impact of various sewage components, effectively share the pressure of excessive water volume and pollutant concentration in the biochemical system, achieve sewage reduction from the source, shorten the sewage treatment time, save labor costs, and realize the reuse of water resources after treatment by the reuse system, saving fresh water resources and achieving cost reduction and efficiency improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely illustrative, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0011] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0012] Figure 1 This is a schematic diagram of a sewage and waste liquid reduction and reuse system.

[0013] In the figure: 1. Water inlet well, 2. Filter screen, 3. Lifting pump, 4. Dosing tank, 5. Pipeline mixer, 6. Grit chamber, 7. Reduction system, 7a. Evaporator, 7b. Booster, 7c. Heat exchanger, 7d. Concentrate outlet, 8. Recycling system, 8a. Ultrafiltration membrane, 8b. Reverse osmosis membrane, 9. Biochemical system, 10. Concentrate return pipe. DETAILED DESCRIPTION

[0014] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can readily understand the other advantages and benefits of the present invention from the contents disclosed in this specification. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0015] Figure 1A wastewater wastewater reduction and reuse system is shown. This system includes an inlet well 1, a filter screen 2, a lift pump 3, a dosing tank 4, a pipeline mixer 5, a grit chamber 6, a reduction system 7, an evaporator 7a, a booster 7b, a heat exchanger 7c, a concentrate outlet 7d, a reuse system 8, an ultrafiltration membrane 8a, a reverse osmosis membrane 8b, and a biochemical system 9. The system includes an inlet well 1 and a biochemical system 9. After passing through the filter screen 2, the inlet well 1 is connected by a lift pump 3 to the inlets of the pipeline mixer 5 and the grit chamber 6. One outlet of the grit chamber 6 is connected by a pipeline to the biochemical system 9, while the other outlet is connected by pipelines to the reduction system 7 and the reuse system 8 in sequence. The reduction system 7 includes a heat exchanger 7c, an evaporator 7a, and a booster 7b, which are connected in sequence. The reuse system 8 is equipped with an ultrafiltration membrane 8a and a reverse osmosis membrane 8b. The system also includes a dosing tank 4, the liquid outlet of which is connected to a pipeline at the water inlet end of the pipeline mixer 5. The bottom of the evaporator 7a is provided with a concentrate outlet 7d, which is connected to the water inlet of the water inlet well 1 by a concentrate return pipe 10.

[0016] When operating using the above technical solution, sewage enters the filter screen 2 through the inlet well 1, where large solid particles are removed. The sewage then flows through the lift pump 3, which raises it to a certain height for gravity flow. Flocculant is then added to the pipeline mixer 5 between the lift pump 3 and the grit chamber 6 via the dosing tank 4, causing the sediment particles to settle rapidly and preventing damage to downstream equipment. Part of the sewage treated in the grit chamber 6 enters the biochemical system 9 for normal biochemical treatment. The remaining part flows into the reduction system 7, where it passes through heat exchanger 7c and enters evaporator 7a. Under vacuum, the sewage is gradually heated to saturation temperature, and the water evaporates as water vapor. The steam is then heated and pressure-increased by booster 7b, before condensing into water in heat exchanger 7c and flowing into the ultrafiltration membrane 8a and reverse osmosis membrane 8b of the reuse system 8, meeting the standards for reused water. The concentrated water from the reduction system 7 and reuse system 8 is then discharged to the inlet well 1, mixed with the incoming sewage, and then recycled for treatment. The system effectively shares the burden of the sewage treatment biochemical system, reduces sewage at the source, shortens sewage treatment time, saves labor costs, and reuses water resources, saving fresh water resources.

[0017] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sewage and waste liquid reduction and reuse system, comprising an inlet well (1) and a biochemical system (9), characterized in that: The water inlet well (1) passes through the filter screen (2) and is then connected to the inlet of the pipeline mixer (5) and the grit chamber (6) by a lifting pump (3); one outlet of the grit chamber (6) is connected to the biochemical system (9) by a pipeline, and the other outlet is connected to the reduction system (7) and the reuse system (8) in sequence by a pipeline; The reduction system (7) includes a heat exchanger (7c), an evaporator (7a), and a booster (7b) connected in sequence, and the reuse system (8) is provided with an ultrafiltration membrane (8a) and a reverse osmosis membrane (8b); The system is also provided with a dosing tank (4), the liquid outlet of the dosing tank (4) being connected to the pipeline at the water inlet end of the pipeline mixer (5).

2. The sewage and waste liquid reduction and reuse system according to claim 1, characterized in that: A concentrated liquid outlet (7d) is provided at the bottom of the evaporator (7a).

3. The sewage and waste liquid reduction and reuse system according to claim 2, characterized in that: The concentrated liquid outlet (7d) is provided with a concentrated liquid return pipe (10) connected back to the water inlet of the water inlet well (1).

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