CN203360229U - Reclaimed water treatment and reuse system - Google Patents

Abstract

The utility model discloses a reclaimed water treatment system, which comprises a grid tank, a regulating tank, a biological contact oxidation tank, a sedimentation tank, a water collection tank, a sand filter, an active carbon filter, an ultraviolet Disinfection tank, the grid groove is connected with the waste water drainage pipe, the water outlet of the ultraviolet disinfection tank is connected with the reclaimed water pipe network, and the pipe connecting the sump tank with the sand filter is provided with a hair accumulator. Instinct can realize the thorough treatment of cleaner wastewater, and the reuse of water can meet the requirements of reuse, and the degree of automation is high, which is convenient for control and automatic management through the central controller, reducing personnel shifts and labor intensity.

Description

Reclaimed water reuse treatment system

technical field

The utility model relates to the technical field of sewage treatment, in particular to a reclaimed water reuse treatment system.

Background technique

Reclaimed water refers to non-drinking water that can be reused in domestic, municipal and environmental areas after various drainages have been treated to meet the specified water quality standards. Recycling of reclaimed water is an important method of recycling sewage. It can not only reduce environmental pollution, but also increase the amount of available water resources, especially for clean washbasins and showers in daily life or office buildings. Drainage, condensate and other waste water are directly discharged into the sewer and mixed with other sewage for unified treatment instead of targeted separate treatment. This will not only increase the amount of sewage treatment and treatment time, but also these cleaner sewage do not need to be treated. Complicated treatment, complex treatment not only wastes time and increases treatment costs, but also delays water recycling. Moreover, the traditional reclaimed water reuse system is aimed at the treatment and reuse of sewage from enterprises. It pays more attention to the sewage treatment of enterprises and units, and does not pay enough attention to the treatment of wastewater such as daily office buildings. The waste water is not the same, and the difference is relatively large, so it is not possible to copy the reclaimed water reuse system of enterprises and units, and the traditional sewage treatment system is not thorough enough, resulting in substandard discharge, and there is no reclaimed water reuse treatment for office buildings and other sewage system.

The disadvantages of the prior art are: the existing reclaimed water reuse system is suitable for enterprises and factories, and is not suitable for the treatment of relatively clean wastewater such as office buildings, and the existing reclaimed water reuse system has a low degree of automation and is not suitable for sewage The processing is not thorough, the management is inconvenient, and the manual labor intensity is relatively high.

Utility model content

The purpose of the utility model is to provide a reclaimed water reuse treatment system, which is suitable for the reuse treatment of relatively clear domestic wastewater, and the sewage treatment is thorough, and the reuse water meets the reuse requirements.

In order to achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a reclaimed water reuse treatment system, including grid tanks, regulating tanks, biological contact oxidation tanks, sedimentation tanks, sump tanks, sand filter, an activated carbon filter, and an ultraviolet sterilizing tank, the grid groove is connected with the waste water drainage pipe, and the water outlet of the ultraviolet sterilizing tank is connected with the reclaimed water reuse pipe network.

This system is suitable for the treatment of relatively clean domestic wastewater, such as washbasins in office buildings and residential areas, shower drainage, condensed water, etc. Since the source water is relatively clean domestic wastewater, the pollutants in the wastewater are mainly small and miscellaneous Therefore, the grid is mainly used to intercept and remove sundries, biological contact oxidation degradation to remove organic matter, sedimentation to remove suspended matter, and further advanced treatment through filtration and activated carbon adsorption to completely remove waste water. Suspended solids and organic matter, and pathogenic bacteria are removed through disinfection, so as to ensure that the treated water meets the reuse requirements.

With the above-mentioned structure, the water outlet of the upper-level device is connected with the water inlet of the lower-level device, and the waste water flows into the grid tank through the waste water drainage pipe. Since the waste water contains some small debris, it enters the follow-up structures, which will damage the equipment and cause blockage. Pipes and grilles are installed in the grid groove to remove most of them, and the gap between the grids is small, which can be 2mm. The mechanical grill adopts a rotary mechanical grill decontamination machine, which implements mechanical automatic slag removal.

The outlet of the grid tank is connected to the water inlet of the regulating tank through pipelines. Since the source water is composed of various waste waters, and the water volume varies greatly in different periods, a regulating tank is set up to adjust the water quality and quantity of the source water to ensure that the reclaimed water The quality and quantity of wastewater in the treatment system are balanced, and the regulating tank is equipped with a perforated aeration and mixing system to pre-aerate and stir the wastewater.

The biological contact oxidation tank is a biological treatment device, and its main function is to remove dissolved organic pollutants in wastewater, such as COD and BOD in the removed wastewater. The biological contact oxidation tank is suspended with high-efficiency biological fillers. By cultivating and acclimating high-efficiency microbial membranes, under oxygenated conditions, the aerobic microbial membranes can adsorb and degrade organic pollutants in sewage.

The outlet of the biological contact oxidation tank is connected to the water inlet of the sedimentation tank. The effluent of the biological contact oxidation tank contains a large amount of aged and fallen biofilm, which exists in the form of suspended solids in the water. The sedimentation tank is the suspension brought out during the biochemical process. matter to precipitate.

The water inlet of the sump is connected with the water outlet of the sedimentation tank, and the sump mainly provides a buffer space for the subsequent treatment of the water intake of the structure, so as to facilitate the collection of treated water and the subsequent lifting of the lifting pump.

The water inlet of the sand filter is connected to the water outlet of the sump, and the suspended solids in the wastewater are further removed through sand filter filtration, and the suspended solid load of the activated carbon filter is reduced to ensure the high efficiency and durability of the activated carbon filter for residual organic matter.

The purpose of setting up the activated carbon filter is to further remove the residual suspended solids and organic matter in the wastewater through adsorption, filtration, etc., to ensure that the turbidity, COD, BOD and other indicators of the treated water except bacteria meet the reuse requirements. The upper parts of the filter and the active carbon filter are all provided with drainage holes, and the drainage holes communicate with the drainage ditch through the recoil drain pipe.

The ultraviolet disinfection pool uses ultraviolet rays for disinfection, mainly to kill pathogenic bacteria in the treated water, so as to ensure that the total coliform group index of the reused water meets the reuse requirements. The water inlet of the ultraviolet disinfection pool is connected to the outlet of the activated carbon filter. The outlet of the ultraviolet disinfection tank can be connected to the reclaimed water reuse pipe network or storage tank, etc.

A hair accumulator is arranged on the pipeline communicating between the sump and the sand filter.

The hair concentrator is installed on the pipeline from the sump to the sand filter, and is used to intercept fine debris in the wastewater, such as hair, cotton balls, etc., so as to avoid affecting the treatment efficiency of subsequent units and ensure the quality of reused water.

Both the regulating tank and the sump are provided with a lifting pump and a float level controller connected to the control end of the lifting pump, and the float level controller is also connected to the central controller.

In order to prevent particles from depositing in the regulating tank, an air stirring system is installed at the bottom of the regulating tank, and the lifting pump in the regulating tank feeds water to the subsequent processing unit. The outlet pipe of the lifting pump in the regulating tank can be equipped with an electromagnetic flowmeter to measure the water flow of the processing station; The flow signal is sent to the central controller and recorded.

After the sewage is treated in the sedimentation tank, it enters the sump. The sump mainly plays the role of water storage and buffering. The water treated in the sedimentation tank is collected, and the water is pumped into the sand filter through the lifting pump. There are floats in the adjustment tank and the sump. Ball liquid level controller, when the liquid level reaches a high level, the lifting water pump starts automatically, when the liquid level is low, the lifting water pump stops automatically, and the two lifting pumps automatically run in turn to avoid unnecessary operation of the equipment, reduce energy consumption, and reduce sewage Processing costs. And the liquid level is transmitted to the central controller, and the liquid level information is displayed on the upper computer and an alarm is given.

It also includes a blower, and the blower communicates with the aeration network pipes arranged at the bottom of the regulating pond and the biological contact oxidation pond respectively through the air pipes.

The air supply outlet is connected with a main air pipe, and the main air pipe is connected with a branch air pipe, and the branch air pipes are respectively connected with the aeration network pipes arranged at the bottom of the regulating tank and the biological contact oxidation tank, and the main air pipe is provided with There is a pressure gauge, and a butterfly valve is arranged on the branch air pipe.

It also includes a sodium hypochlorite dosing device, the drug outlet of the sodium hypochlorite dosing device communicates with the ultraviolet disinfection pool through a medicine pipeline, and a ball valve and a sodium hypochlorite dosing pump are arranged on the medicine pipeline near the medicine outlet of the sodium hypochlorite dosing device.

According to the requirements of water addition standards, reused water must have a certain amount of residual chlorine, mainly to avoid re-growth of bacteria and pathogenic bacteria after the disinfected reclaimed water enters the reuse pipe network. In order to ensure the anti-virus effect and the residual chlorine requirements in the reused water, and to ensure the residual chlorine content in the reused water by adding sodium hypochlorite, the sodium hypochlorite dosing device is equipped with a dispensing stirring device and a low liquid level alarm device.

It also includes a flocculant dosing device, the flocculant dosing device communicates with the water inlet of the sand filter through a dosing pipeline, the dosing pipeline is provided with a flocculant dosing pump and a ball valve, the sand filter and the collection A pipeline mixer is arranged on the connecting pipeline of the pool, and the medicine adding pipeline communicates with the pipeline mixer.

Add flocculant to the influent water before sand filtration to enhance the filtration effect. A stirring device is installed in the flocculant dosing device, and a low liquid level alarm device can also be installed.

An on-line dissolved oxygen detector is installed in the biological contact oxidation pool, and an on-line residual chlorine detector is installed in the ultraviolet disinfection pool.

The biological contact oxidation tank is composed of a primary contact oxidation tank and a secondary contact oxidation tank. The water inlet of the contact oxidation tank is connected, the water outlet of the secondary contact oxidation tank is connected with the water inlet of the sedimentation tank, and the dissolved oxygen online detector is set in the secondary contact oxidation tank.

The dissolved oxygen online detector is installed in the biological contact oxidation tank to detect the dissolved oxygen concentration in the contact oxidation tank online, and can control the operation of the fan, so as to ensure that the biological contact oxidation tank operates under the best oxygenation conditions, realize energy saving and consumption reduction, and set a level The contact oxidation tank and the secondary contact oxidation tank can more effectively remove organic matter in wastewater through two-stage treatment. An online residual chlorine detector is installed in the ultraviolet disinfection pool to detect the residual chlorine in the disinfection water, so as to ensure the disinfection effect and the residual chlorine content of the disinfection water. The residual chlorine online detector can also be set at the outlet of the ultraviolet disinfection pool.

The water outlet of the ultraviolet disinfection tank is connected with a reclaimed water storage tank, which is connected with the reclaimed water reuse pipe network, and the reclaimed water storage tank is also connected to the sand filter and the activated carbon filter through a backwash water pump. The water inlet is connected.

The reclaimed water storage tank stores the treated reclaimed water so that it can be reused by the water supply device and used for the backwash operation of the filter backwash pump, etc. A high water level alarm device is installed in the reclaimed water storage tank. When the water level rises to the high water level alarm line, the alarm bell and light will be activated, and at the same time, the operation of the previous stage running water pump will be stopped, and the water level will be lowered to the medium level before starting. In addition, the backwash water pump of the sand filter and activated carbon filter is installed in the clear water tank, so as to backwash the sand filter and activated carbon filter according to the operating conditions. After the sand filter and activated carbon filter have been in operation for a period of time, the intercepted pollutants increase and the head loss increases. At this time, the backwash pump is started to backwash them, so as to ensure the continuous and stable operation of the system, and the backwash water is recycled. , greatly reducing the amount of backwash water, and the backwash water can be returned to the adjustment tank for reprocessing.

The lower part of the sedimentation tank is provided with a sludge outlet, the sludge outlet is connected to a sludge pipe, and the end of the sludge pipe is connected to two branch pipes, one of which is connected to the septic tank, and the other is connected to the water inlet of the biological contact oxidation tank. A check valve and a sludge lifting pump are installed on the sludge pipe.

Part of the settled sludge flows into the biological contact oxidation tank, and the other part flows into the septic tank, which is cleaned and transported regularly, and gate valves can be installed in the two branch pipes.

Since the stench emitted by the grid tank and regulating pool is not easy to dissipate, it is necessary to treat the odor emitted by the sewage in the structure to prevent the operator from causing harm. Therefore, a cover plate is provided for the structure emitting the odor. There is an exhaust hole, and the exhaust fan sends the odor into the deodorization filter tower for deodorization and then discharges it into the atmosphere. The position and elevation of the reclaimed water treatment device are arranged according to the process, and the reclaimed water flows into the next process by gravity as much as possible. Reduce energy consumption.

The beneficial effect of the utility model is: it can realize the thorough treatment of the cleaner waste water, the recycled water can meet the requirement of reuse, and the degree of automation is high, it is convenient to carry out control and automatic management through the central controller, and reduce the number of shifts and labor intensity, etc. .

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is the waste water treatment flowchart of the present utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

As shown in Figure 1 and Figure 2, a reclaimed water reuse treatment system includes a grid tank 1, a regulating tank 2, a biological contact oxidation tank, a sedimentation tank 4, a water collection tank 5, sand Filter 6, activated carbon filter 7, ultraviolet sterilizing pool 8, the grid groove 1 is connected with the waste water drainage pipe, the water outlet of the ultraviolet sterilizing pool 8 is connected with the reclaimed water pipe network, and the regulating pool 2 is in contact with the biological A hair accumulator 9 is arranged on the pipeline connected to the oxidation tank, and a lifting water pump 10 and a float level controller 15 connected to the control end of the lifting water pump 10 are all provided in the regulating tank 2 and the sump 5. The bit controller 15 is also connected to the central controller.

Also comprise blower fan 12, sodium hypochlorite dosing device 14, flocculant dosing device 16, described blower fan 12 is respectively communicated with the aeration network pipe that is arranged on regulating tank 2 and the biological contact oxidation tank bottom through air duct, and described sodium hypochlorite dosing device The drug outlet of 14 communicates with the ultraviolet disinfection pool 8 through the drug pipeline, and a ball valve and a sodium hypochlorite dosing pump are arranged on the drug pipeline near the drug outlet of the sodium hypochlorite dosing device 14 . The flocculant dosing device 16 communicates with the water inlet of the sand filter 6 through the dosing pipeline, the dosing pipeline is provided with a flocculant dosing pump and a ball valve, and the connecting pipe between the sand filter 6 and the sump 5 is provided with Pipeline mixer 17, the dosing pipeline communicates with the pipeline mixer 17; the low liquid level detection device is also arranged in the flocculant dosing device 16 and the sodium hypochlorite dosing device 14, and the low liquid level detection device is connected with the central controller The communication connection enables the central controller to give an alarm when the drug liquid level in the flocculant dosing device 16 and the sodium hypochlorite dosing device 14 is too low, and to control the sodium hypochlorite dosing pump and the flocculant dosing pump to stop.

The biological contact oxidation tank is composed of a primary contact oxidation tank 3a and a secondary contact oxidation tank 3b, the bottoms of the primary contact oxidation tank 3a and the secondary contact oxidation tank 3b are all provided with aeration network pipes, and the primary contact oxidation tank 3a is equipped with an aeration network pipe. The water inlet of pond 3a is communicated with the water outlet of regulating pond 2, and the water outlet of this primary contact oxidation pond 3a is communicated with the water inlet of secondary contact oxidation pond 3b, and the water outlet of described secondary contact oxidation pond 3b is connected with sedimentation tank 4 connected to the water inlet, the secondary contact oxidation tank 3b is provided with a dissolved oxygen online detector 20, and the ultraviolet disinfection tank 8 is provided with a residual chlorine online detector 21.

The water outlet of the ultraviolet disinfection tank 8 is connected with a reclaimed water storage tank 11, which is connected with the reclaimed water pipe network, and the reclaimed water storage tank 11 is also connected to the sand filter 6 through a backwash water pump 19. It communicates with the water inlet of the activated carbon filter 7, and the backwash water pump 19 is installed in the reclaimed water storage tank 11.

The reclaimed water reuse treatment system is suitable for the treatment of relatively clean domestic wastewater in office buildings. The pollutants in the wastewater are mainly fine debris, suspended solids, and organic pollutants. Washbasin, shower drainage, condensate, etc. Collected by the collection pipe network, the artesian flow enters the grid tank 1, intercepts and removes debris through the fine grid, and then flows into the adjustment tank 2. The adjustment tank 2 is equipped with a perforated aeration system. On the one hand, the wastewater is pre-aerated. Under the agitation of the air, the water quality is homogenized, and the water volume is adjusted. The homogenized and equalized waste water is pumped into the biological contact oxidation tank through the lifting water pump 10 in the regulating tank 2 . High-efficiency biological fillers are suspended in the biological contact oxidation tank, and biofilms are cultivated to absorb and degrade organic pollutants in wastewater through biofilms, and remove COD, BOD, etc. in wastewater. It flows into the sedimentation tank 4 by gravity, and enters the water collection tank 5 after removing suspended solids through sedimentation. On the pipeline that sump 5 communicates with sand filter 6, hair collector 9 is installed to intercept hair and other small sundries in waste water, and the waste water filtered by hair collector 9 enters sand filter 6, in order to ensure that the treated water The waste water in the sump 5 is pumped into the sand filter 6 and the activated carbon filter 7 through the lifting pump 10 for filtration and adsorption treatment, and the pollutants in the waste water are thoroughly removed, and then enters the ultraviolet disinfection pool 8 for disinfection. After removing pathogenic bacteria and other viruses in the waste water, it enters the reclaimed water storage tank 11, and the treated standard water in the reclaimed water storage tank 11 is reused in the reclaimed water pipe network system through the recycling device.

Claims (10)

1. A reclaimed water reuse treatment system, characterized in that: it includes a grid tank (1), a regulating tank (2), a biological contact oxidation tank, a sedimentation tank (4), and a water collection tank connected by pipelines in sequence according to the wastewater flow direction (5), sand filter (6), activated carbon filter (7), ultraviolet disinfection tank (8), the grid groove (1) is connected with the waste water drainage pipeline, and the water outlet of the ultraviolet disinfection tank (8) It is connected with the reclaimed water reuse pipe network. 2. The reclaimed water reuse treatment system according to claim 1, characterized in that: a hair accumulator (9) is arranged on the pipe connecting the sump (5) and the sand filter (6). 3. The reclaimed water reuse treatment system according to claim 1, characterized in that: both the regulating tank (2) and the sump (5) are equipped with a lifting pump (10) and are controlled by the lifting pump (10). The float level controller (15) connected to the end, and the float level controller (15) is also connected to the central controller. 4. The reclaimed water reuse treatment system according to claim 1, characterized in that it also includes a fan (12), and the fan (12) is respectively connected to the adjustment tank (2) and the biological contact oxidation tank through the air duct The aeration network pipe at the bottom is connected. 5. The reclaimed water treatment system according to claim 1, characterized in that it also includes a sodium hypochlorite dosing device (14), and the medicine outlet of the sodium hypochlorite dosing device (14) is sterilized by the medicine pipeline and ultraviolet rays The pool (8) is connected, and a ball valve and a sodium hypochlorite dosing pump are arranged on the medicine pipeline close to the medicine outlet of the sodium hypochlorite dosing device (14). 6. The reclaimed water treatment system according to claim 1, characterized in that it further comprises a flocculant dosing device (16), and the flocculant dosing device (16) communicates with the sand filter through a dosing pipeline The water inlet of (6) is connected, and the dosing pipeline is provided with a flocculant dosing pump and a ball valve, and a pipe mixer (17) is provided on the connecting pipe between the sand filter (6) and the sump (5). The above-mentioned dosing pipeline is communicated with the pipeline mixer (17). 7. The reclaimed water reuse treatment system according to claim 1, characterized in that: an online dissolved oxygen detector (20) is installed in the biological contact oxidation tank, and a residual chlorine online detector (20) is installed in the ultraviolet disinfection tank (8). Detector (21). 8. The reclaimed water reuse treatment system according to claim 7, characterized in that: the biological contact oxidation tank is composed of a primary contact oxidation tank (3a) and a secondary contact oxidation tank (3b), the primary The water inlet of the contact oxidation tank (3a) is connected with the water outlet of the regulating tank (2), the water outlet of the primary contact oxidation tank (3a) is connected with the water inlet of the secondary contact oxidation tank (3b), and the secondary The water outlet of the contact oxidation tank (3b) is connected with the water inlet of the sedimentation tank (4), and the online dissolved oxygen detector (20) is set in the secondary contact oxidation tank (3b). 9. The reclaimed water treatment system according to claim 1, characterized in that: the outlet of the ultraviolet disinfection tank (8) is connected with a reclaimed water storage tank (11), and the reclaimed water storage tank (11) is connected to The reclaimed water reuse pipe network is connected, and the reclaimed water storage tank (11) is also communicated with the water inlets of the sand filter (6) and the activated carbon filter (7) through a backwash water pump (19). 10. The reclaimed water reuse treatment system according to claim 1, characterized in that: the lower part of the sedimentation tank (4) is provided with a sludge discharge port, the sludge discharge port is connected to a sludge pipe, and the end of the sludge pipe is connected to two branch pipes , one of the branch pipes is connected with the septic tank (18), the other is connected with the water inlet of the biological contact oxidation tank, and a check valve and a sludge lifting pump are arranged on the sludge pipe.

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