Reclaimed water recycling system for sewage treatment

Abstract

The utility model discloses a water recycling system in sewage treatment, which belongs to the technical field of sewage treatment, and comprises a laminated filter, an ultrafiltration device, an ultrafiltration water tank, an RO (reverse osmosis) water feeding pump and a security filter which form a treatment process of a pretreatment stage, so that primary filtration, pH value regulation, ultrafiltration treatment and interception of large-particle substances are comprehensively realized for sewage; through the arrangement of the RO device, sewage is subjected to multi-dimensional treatment before passing through the RO device for reverse osmosis treatment, the water quality is adjusted to guarantee the reverse osmosis treatment efficiency of the RO device, and the sewage is more stable and efficient when being conveyed to the RO device for reverse osmosis treatment and output to the water producing tank and the recycling water tank through the arrangement of the high-pressure pump and the lifting pump; according to the system, the water pressure is stable, the situation that the filtering efficiency becomes poor due to unstable water pressure is avoided, and the pressure-stabilizing water supply device is arranged to guarantee return water conveying, so that the water quality of water reuse in sewage is greatly improved, the reuse requirement of the high water quality standard is met, and high treatment and circulation efficiency is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment water reuse system. Background Art

[0002] The reuse system of reclaimed water in the sewage treatment process belongs to the scope of sewage treatment technology. In the existing technology, sewage is pumped from the sewage treatment discharge pool into the laminated filter through the water inlet high-pressure pump, and then into the ultrafiltration water tank after passing through the laminated filter, ultrafiltration system, and security filter. It is then pumped into the reverse osmosis system by the reverse osmosis high-pressure pump, and then into the production water tank. It is then pumped into the reuse water pool by the lift pump. Sodium hypochlorite is generated by the sodium hypochlorite generator of electrolyzed edible salt and then added to the reuse water pool for sterilization. After sterilization by adding medicine, it is pumped into the reuse water tank by the lift pump, and then supplied to the reuse water network or equipment water network of the whole plant through the pressure-stabilizing water supply device.

[0003] However, the existing sewage treatment-based water reuse system has a low degree of treatment for the reused water and is unable to meet the reuse needs with higher water quality requirements. Therefore, this application proposes a sewage treatment water reuse system. Utility Model Content

[0004] The main purpose of the utility model is to provide a sewage treatment water reuse system, which greatly improves the water quality of sewage water reuse, meets the reuse needs of higher water quality standards, and ensures higher treatment and circulation efficiency.

[0005] In order to achieve the above-mentioned purpose, the utility model proposes a sewage treatment water reuse system, which includes an inlet pump, a laminated filter, an ultrafiltration device, an ultrafiltration water tank, an RO water pump, a safety filter, a high-pressure pump, an RO device, a water production tank, a lifting pump, a reuse water pool, a reuse water tank and a pressure-stabilizing water supply device; the inlet pump is used to extract sewage from the discharge pool where the original sewage treatment effluent is accumulated, and transport it to the laminated filter, the laminated filter is used to perform preliminary filtration on the sewage input by the inlet pump, the ultrafiltration device is used to perform ultrafiltration treatment on the sewage treated by the laminated filter, and transport it to the ultrafiltration water tank for accumulation, the The RO water supply pump is used to pump the ultrafiltration water tank to the security filter. The security filter is used for the final filtration in the pretreatment stage and intercepts the large particles remaining in the preliminarily treated sewage. The high-pressure pump is used to pump the water treated by the security filter and transport it to the RO device. The RO device is used to remove impurities, bacteria, viruses, and heavy metals in the water and further transport it to the production water tank. The lift pump is used to extract water from the production water tank and transport it to the reuse water pool, and further extract it from the reuse water pool and transport it to the reuse water tank. The pressure-stabilizing water supply device is used to stabilize the pressure of the pre-stored water in the reuse water tank and then transport it to the reuse point.

[0006] Optionally, the ultrafiltration device includes an acid adding device, an alkali adding device and a bactericide adding device, wherein the acid adding device and the alkali adding device are used to add acidic or alkaline substances to the ultrafiltration system to adjust the pH value of the influent, and adjust the pH value to a range that achieves the best filtration effect; the bactericide adding device is used to inhibit and prevent the massive reproduction of microorganisms and avoid microbial contamination and blockage of the ultrafiltration membrane.

[0007] Optionally, the ultrafiltration water tank includes an ultrafiltration backwash pump, which acts on the backwash operation of the ultrafiltration system and restores the filtration performance of the ultrafiltration membrane to ensure long-term stable operation of the water treatment system.

[0008] Optionally, the safety filter is provided with an antiscalant dosing device and a reducing agent dosing device in front of it. The antiscalant dosing device is used to prevent and delay the formation of scale and improve the operating efficiency and service life of the equipment; the reducing agent dosing device is used to remove oxidizing media in the water and ensure that the water quality meets the requirements of subsequent treatment and reuse.

[0009] Optionally, the RO device is provided with a RO fast flush pump, which is used to provide sufficient working pressure for the reverse osmosis membrane and quickly flush the membrane surface in the RO system.

[0010] Optionally, the reuse water pool is provided with a sodium hypochlorite sterilization device, which kills bacteria, viruses and harmful microorganisms in the water and oxidizes organic matter in the water.

[0011] Compared with the existing technology, the present invention has the following beneficial effects:

[0012] The utility model sewage treatment water reuse system is provided with a stacked filter, an ultrafiltration device, an ultrafiltration water tank, an RO water supply pump, and a safety filter to form a pretreatment stage of the treatment process, which more comprehensively realizes the initial filtration, pH value adjustment, ultrafiltration treatment and interception of large particulate matter for the sewage, so that the sewage can be treated in multiple dimensions before passing through the RO device for reverse osmosis treatment, and the water quality is adjusted to ensure the efficiency of the reverse osmosis treatment of the RO device. The provision of the high-pressure pump and the lifting pump makes it more stable and efficient to transport the sewage to the RO device for reverse osmosis treatment and output it to the water production tank and the reuse water pool, avoiding the deterioration of filtration efficiency caused by unstable water pressure, and providing a pressure-stabilizing water supply device to ensure return water transportation, thereby greatly improving the water quality of the sewage reuse water, meeting the reuse needs of higher water quality standards, and ensuring higher treatment and circulation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order 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 use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0014] Figure 1 This is a system flow diagram of the wastewater treatment water reuse system of the utility model.

[0015] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0016] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0017] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0018] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0019] Please refer to Figure 1The utility model proposes a sewage treatment water reuse system, which includes an inlet pump, a laminated filter, an ultrafiltration device, an ultrafiltration water tank, an RO water supply pump, a safety filter, a high-pressure pump, an RO device, a water production tank, a lifting pump, a reuse water tank, a reuse water tank and a pressure-stabilizing water supply device; the inlet pump is used to extract the sewage from the discharge pool where the original sewage treatment effluent is stored and transport it to the laminated filter; the laminated filter is used to perform preliminary filtration on the sewage input by the inlet pump; the ultrafiltration device is used to perform ultrafiltration treatment on the sewage treated by the laminated filter and transport it to the ultrafiltration water tank for storage; the RO water supply pump is used to pump From the ultrafiltration water tank to the security filter, the security filter acts on the final filtration in the pretreatment stage and intercepts large particles (such as suspended matter, sediment, rust, etc.) remaining in the preliminarily treated sewage. The high-pressure pump acts on pumping water treated by the security filter and transporting it to the RO device. The RO device acts on removing impurities, bacteria, viruses, heavy metals, etc. in the water and further transports it to the production water tank. The lifting pump acts on extracting water from the production water tank and transporting it to the reuse water pool, and further extracts it from the reuse water pool and transports it to the reuse water tank. The pressure-stabilizing water supply device acts on the pressure-stabilizing water supply to the pre-stored water in the reuse water tank and then transports it to the reuse point.

[0020] In one embodiment of the present invention, the ultrafiltration device includes an acid adding device, an alkali adding device and a bactericide adding device. The acid adding device and the alkali adding device are used to add acidic or alkaline substances to the ultrafiltration system to adjust the pH value of the incoming water, and adjust the pH value to a range that achieves the best filtration effect; the bactericide adding device is used to inhibit and prevent the massive reproduction of microorganisms and avoid microbial contamination and blockage of the ultrafiltration membrane.

[0021] More specifically, by setting up an acid-adding device and an alkali-adding device, the pH value can be adjusted to reduce the deposition of minerals in the water (such as calcium, magnesium, etc.) on the membrane surface, thereby reducing the risk of membrane contamination and achieving the effect of maintaining the permeability of the ultrafiltration membrane and extending its service life; by setting up a bactericide-adding device, it is beneficial to maintain the normal operation of the ultrafiltration system, ensure the water quality of the produced water, prevent the operating pressure difference from increasing, and avoid microbial contamination of the ultrafiltration membrane, which makes it difficult to remove pollutants through conventional water flushing or chemical cleaning methods.

[0022] In one embodiment of the present invention, the ultrafiltration water tank includes an ultrafiltration backwash pump, which acts on the backwash operation of the ultrafiltration system and restores the filtering performance of the ultrafiltration membrane to ensure long-term stable operation of the water treatment system.

[0023] More specifically, by setting up an ultrafiltration backwash pump for regular backwashing, the ultrafiltration backwash pump can maintain the stable operation of the ultrafiltration system, extend the service life of the membrane assembly, and reduce maintenance costs.

[0024] In one embodiment of the utility model, an antiscalant dosing device and a reducing agent dosing device are provided in front of the security filter. The antiscalant dosing device is used to prevent and delay the formation of scale and improve the operating efficiency and service life of the equipment; the reducing agent dosing device is used to remove oxidizing media in the water and ensure that the water quality meets the requirements of subsequent treatment and reuse.

[0025] More specifically, by setting up a scale inhibitor dosing device to prevent and delay the formation of scale, it can reduce the problem of reduced heat transfer efficiency caused by scaling of the equipment and improve the operating efficiency of the equipment; by setting up a reducing agent dosing device, in the sewage pretreatment system, the residual chlorine can be effectively removed from the sewage before entering the reverse osmosis membrane for treatment, thereby avoiding damage to the reverse osmosis membrane by the residual chlorine and ensuring the performance and service life of the reverse osmosis membrane.

[0026] In one embodiment of the present invention, the RO device is provided with a RO fast flush pump, which is used to provide sufficient working pressure for the reverse osmosis membrane and quickly flush the membrane surface in the RO system.

[0027] More specifically, by setting up an RO fast flush pump, the osmotic pressure difference can be overcome, ensuring that the reverse osmosis process can proceed normally, and the water production efficiency of the RO system can be improved, membrane pollution can be reduced, and the service life of the membrane can be extended.

[0028] In one embodiment of the present invention, the reuse water pool is provided with a sodium hypochlorite sterilization device, which acts to kill bacteria, viruses and other harmful microorganisms in the water and oxidize organic matter in the water.

[0029] More specifically, by setting up a sodium hypochlorite sterilization device and accurately adding sodium hypochlorite solution, pathogens in the water can be completely eliminated and water quality safety can be guaranteed, while oxidizing organic matter in the water can achieve the effect of removing odor and color.

[0030] Working Principle: When the effluent from the raw sewage treatment is transported to the discharge pool, the sewage is extracted by the water inlet pump and transported to the water inlet pump for treatment. The water inlet pump acts on the sewage in the discharge pool where the raw sewage treatment effluent is stored, and then transported to the laminated filter for preliminary filtration of the sewage input by the water inlet pump, and then transported to the ultrafiltration device for ultrafiltration treatment. The sewage is then transported to the ultrafiltration water tank. The RO water supply pump pumps the sewage from the ultrafiltration water tank to the safety filter. The safety filter intercepts the large particles (such as suspended solids, sediment, rust, etc.) remaining in the preliminary treated sewage, thereby completing the pretreatment process; the water treated by the safety filter is then pumped by the high-pressure pump and transported to the RO device for removal of impurities, bacteria, viruses, heavy metals, etc., and then discharged to the water production tank. At this time, the lifting pump extracts it and transports it to the reuse water pool, and then transports it to the reuse water tank through the lifting pump. The pressure-stabilizing water supply device lifts and maintains the pressure of the pre-stored water, and finally transports it to the reuse point.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A sewage treatment water reuse system, characterized in that: It includes an inlet pump, a laminated filter, an ultrafiltration device, an ultrafiltration water tank, an RO water supply pump, a safety filter, a high-pressure pump, an RO device, a water production tank, a lifting pump, a reuse water tank, a reuse water tank and a pressure-stabilizing water supply device; the inlet pump is used to extract sewage from the discharge pool where the original sewage treatment effluent is stored, and transport it to the laminated filter; the laminated filter is used to perform preliminary filtration on the sewage input by the inlet pump; the ultrafiltration device is used to perform ultrafiltration treatment on the sewage treated by the laminated filter and transport it to the ultrafiltration water tank for accumulation; the RO water supply pump is used to pump the ultrafiltration water tank To the security filter, the security filter acts on the final filtration in the pretreatment stage and intercepts large particles remaining in the preliminarily treated sewage. The high-pressure pump acts on pumping water treated by the security filter and transporting it to the RO device. The RO device acts on removing impurities, bacteria, viruses, and heavy metals in the water and further transporting it to the production water tank. The lift pump acts on extracting water from the production water tank and transporting it to the reuse water pool, and further extracts water from the reuse water pool and transports it to the reuse water tank. The pressure-stabilizing water supply device acts on stabilizing the pressure of the pre-stored water in the reuse water tank and then transports it to the reuse point.

2. The sewage treatment water reuse system according to claim 1, characterized in that: The ultrafiltration device includes an acid adding device, an alkali adding device and a bactericide adding device. The acid adding device and the alkali adding device are used to add acidic or alkaline substances to the ultrafiltration system to adjust the pH value of the influent, and adjust the pH value to a range that can achieve the best filtration effect; the bactericide adding device is used to inhibit and prevent the massive reproduction of microorganisms and avoid microbial contamination and blockage of the ultrafiltration membrane.

3. The sewage treatment water reuse system according to claim 1, characterized in that: The ultrafiltration water tank includes an ultrafiltration backwash pump, which acts on the backwash operation of the ultrafiltration system and restores the filtering performance of the ultrafiltration membrane, ensuring the long-term stable operation of the water treatment system.

4. The sewage treatment water reuse system according to claim 1, characterized in that: The safety filter is provided with an antiscalant dosing device and a reducing agent dosing device in front. The antiscalant dosing device is used to prevent and delay the formation of scale and improve the operating efficiency and service life of the equipment; the reducing agent dosing device is used to remove oxidizing media in the water and ensure that the water quality meets the requirements of subsequent treatment and reuse.

5. The sewage treatment water reuse system according to claim 1, characterized in that: The RO device is provided with a RO fast flush pump, which is used to provide sufficient working pressure for the reverse osmosis membrane and quickly flush the membrane surface in the RO system.

6. The sewage treatment water reuse system according to claim 1, characterized in that: The reuse water pool is provided with a sodium hypochlorite sterilization device, which acts to kill bacteria, viruses and harmful microorganisms in the water and oxidize organic matter in the water.

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