Wastewater treatment device

Abstract

The utility model belongs to the technical field of wastewater treatment, and particularly relates to a wastewater treatment device. Comprising a raw water tank, a raw water pump, a membrane device, a water producing tank, a cleaning water tank and a cleaning pump, the device can purify wastewater containing organic matters, the wastewater stored in the raw water tank enters the membrane device through the raw water pump, the organic matters are adsorbed by membrane elements in the membrane device, and the organic matters in the wastewater are removed. And when the adsorption of the membrane element in the membrane device is saturated, stopping the wastewater treatment process, cleaning the membrane element, and recovering the adsorption capacity of the chemically cleaned membrane element. And raw water is pumped into the membrane device from the raw water tank through the raw water pump for flushing, and after flushing is completed, the whole device can perform wastewater treatment again. The device disclosed by the utility model is particularly suitable for a middle-color / wastewater recycling system, organic matters in water can be removed after reclaimed water / wastewater is treated by the device, and the risk that a reverse osmosis membrane is polluted in the prior art is delayed or avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of wastewater treatment, and specifically relates to a wastewater treatment device. Background Art

[0002] With the scarcity of water resources and the strengthening of water pollution prevention and control, the reuse of reclaimed water and wastewater has become a trend. The reuse of reclaimed water and wastewater generally adopts a double membrane method (ultrafiltration + reverse osmosis) treatment process, but the organic matter in reclaimed water or wastewater is high, which easily causes the fouling of the reverse osmosis membrane system. After the reverse osmosis membrane is fouled, the water output decreases. Some organic matter fouls the reverse osmosis membrane and is difficult to recover by chemical cleaning. In addition, conventional methods for reducing organic matter in water include activated carbon adsorption, resin adsorption, catalytic oxidation, etc., but these methods generally occupy a large area, have high investment and high operating costs. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model discloses a wastewater treatment device, which specifically includes the following contents:

[0004] A wastewater treatment device comprises a raw water tank, a raw water pump, a membrane device, a production water tank, a cleaning water tank, and a cleaning pump, wherein the membrane device is provided with a water inlet, a first outlet, a second outlet, and a third outlet, wherein the first outlet is externally connected to a first interface pipe; the raw water tank is provided with a raw water outlet, wherein the raw water outlet is connected to the water inlet of the membrane device through a first pipe, and the raw water pump is arranged on the first pipe; the production water tank is provided with a production water inlet, wherein the production water inlet is connected to the first interface pipe through a second pipe, and a second valve is arranged on the second pipe; the production water inlet is connected to the second outlet through a third pipe; the cleaning water tank is provided with a cleaning water outlet and a cleaning water return port, wherein the cleaning water outlet is connected to the water inlet of the membrane device through a fourth pipe, and the cleaning pump is arranged on the fourth pipe; the cleaning water return port is connected to the third outlet of the membrane device through a fifth pipe; the cleaning water return port is connected to the first interface pipe through a sixth pipe, and a sixth valve is arranged on the sixth pipe.

[0005] Specifically, it also includes a filtering device, which is provided with a liquid inlet and a liquid outlet; the fourth pipeline includes a first section and a second section; the liquid inlet of the filtering device is connected to the cleaning water outlet through the first section of the fourth pipeline, and the cleaning pump is arranged on the first section of the fourth pipeline; the liquid outlet of the filtering device is connected to the water inlet of the membrane device through the second section of the fourth pipeline.

[0006] Specifically, it also includes a first flushing water outlet pipe and a second flushing water outlet pipe; the second pipe includes a first section and a second section, the first section and the second section of the second pipe are connected to the first flushing water outlet pipe through a tee, and the first flushing water outlet pipe is provided with a first flushing water outlet valve; the third pipe includes a first section and a second section, the first section and the second section of the third pipe are connected to the second flushing water outlet pipe through a tee, and the second flushing water outlet pipe is provided with a second flushing water outlet valve.

[0007] Specifically, it also includes a valve system, which includes the second valve, the sixth valve, and a raw water pump inlet valve arranged on the first pipe outside the raw water pump inlet, a raw water pump outlet valve arranged on the first pipe outside the raw water pump outlet, a membrane device water inlet valve arranged on the first pipe outside the membrane device water inlet, a fresh water valve arranged on the third pipe, a cleaning pump inlet valve arranged on the fourth pipe outside the cleaning pump inlet, a cleaning pump outlet valve arranged on the fourth pipe outside the cleaning pump outlet, a membrane device cleaning water inlet valve arranged on the fourth pipe outside the membrane device water inlet, and a membrane device cleaning fresh water valve arranged on the fifth pipe.

[0008] Specifically, it also includes a liquid level detection system, a conductivity detection system, and a pressure detection system. The liquid level detection system includes a raw water level detection device arranged in the raw water tank, a produced water level detection device arranged in the produced water tank, and a cleaning water level detection device arranged in the cleaning water tank; the conductivity detection system includes a raw water conductivity detection device arranged on the first pipeline, and a produced water conductivity detection device arranged on the third pipeline; the pressure detection system includes a raw water pump outlet pressure detection device arranged on the first pipeline outside the raw water pump outlet, a membrane device inlet pressure detection device arranged on the first pipeline outside the membrane device water inlet, a fresh water pressure detection device arranged on the third pipeline outside the second outlet, a concentrated water pressure detection device arranged on the first interface pipe outside the first outlet, a cleaning pump outlet pressure detection device arranged on the fourth pipeline outside the cleaning pump outlet, a filter device inlet pressure detection device arranged on the fourth pipeline outside the filter device liquid inlet, and a filter device outlet pressure detection device arranged on the fourth pipeline outside the filter device liquid outlet.

[0009] Specifically, it also includes an automatic control system, which is connected to the valve system, the liquid level detection system, the conductivity detection system, and the pressure detection system respectively.

[0010] Specifically, the cleaning water tank is also provided with a circulating water outlet, and the circulating water outlet is connected to the fourth pipe between the filtering device and the cleaning pump through a seventh pipe. The seventh pipe is provided with a cleaning circulation valve, and the cleaning circulation valve is connected to the automatic control system.

[0011] Specifically, the membrane device is provided with a reverse osmosis membrane element with high flux and low desalination rate, and the membrane element is installed vertically in the membrane device.

[0012] Beneficial effects of the utility model:

[0013] The device disclosed in the utility model can purify wastewater containing organic matter. The wastewater stored in the raw water tank enters the membrane device through the raw water pump, and the organic matter is adsorbed by the membrane element in the membrane device. The organic matter in the wastewater is removed, and the produced water enters the water production tank through the first outlet, the second outlet, the first interface pipe, the second pipeline, and the third pipeline. When the adsorption of the membrane element in the membrane device reaches saturation, the wastewater treatment process is stopped, the membrane element is cleaned, and the prepared cleaning liquid is loaded into the cleaning water tank, and then enters the filter device through the cleaning pump and enters the membrane device from the water inlet of the membrane device after filtration, and the membrane element is chemically cleaned. The cleaning water flows back to the cleaning water tank from the first outlet, the third outlet, the first interface pipe, the sixth pipeline, and the fifth pipeline, and the adsorption capacity of the membrane element after chemical cleaning is restored. Then, the raw water is pumped from the raw water tank to the membrane device through the raw water pump for flushing, and the flushing water is discharged through the first outlet, the second outlet, the first interface pipe, the second pipeline, the first flushing water outlet pipe, the third pipeline, and the second flushing water outlet pipe. After the flushing is completed, the entire device can be used for wastewater treatment again. The device disclosed by the utility model is particularly suitable for use in a neutral water / wastewater reuse system. After the neutral water / wastewater is treated by the device, organic matter in the water can be removed, thereby delaying or avoiding the risk of reverse osmosis membrane contamination in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the device disclosed by the utility model. DETAILED DESCRIPTION

[0015] The following is combined with Figure 1 The utility model is described in detail with specific implementation methods. The embodiments shown below do not limit the contents of the utility model described in the claims. In addition, the entire contents of the structures shown in the following embodiments are not limited to the solutions required for the utility model described in the claims.

[0016] Reference Figure 1, the arrows in the figure indicate the direction of liquid flow. A wastewater treatment device, comprising a raw water tank S-1, a raw water pump S-2, a membrane device S-3, a produced water tank S-4, a cleaning water tank S-5, and a cleaning pump S-6, wherein the membrane device S-3 is provided with a water inlet, and a first outlet, a second outlet, and a third outlet, wherein the first outlet is externally connected to a first interface pipe; the raw water tank S-1 is provided with a raw water outlet, wherein the raw water outlet is connected to the water inlet of the membrane device S-3 via a first pipeline, and the raw water pump S-2 is provided on the first pipeline; the produced water tank S-4 is provided with a produced water inlet, wherein the produced water inlet and the first interface pipe are connected via a first pipeline. Two pipes are connected, and a second valve VM04 is arranged on the second pipe; the produced water inlet and the second outlet are connected through a third pipe; the cleaning water tank S-5 is provided with a cleaning water outlet and a cleaning return water inlet, and the cleaning water outlet and the water inlet of the membrane device S-3 are connected through a fourth pipe, and the cleaning pump S-6 is arranged on the fourth pipe; the cleaning return water inlet and the third outlet of the membrane device S-3 are connected through a fifth pipe; the cleaning return water inlet and the first interface pipe are connected through a sixth pipe, and a sixth valve VM03 is arranged on the sixth pipe.

[0017] In one embodiment of the utility model, it also includes a filter device S-7, which is provided with a liquid inlet and a liquid outlet; the fourth pipeline includes a first section and a second section; the liquid inlet of the filter device S-7 is connected to the cleaning water outlet through the first section of the fourth pipeline, and the cleaning pump S-6 is arranged on the first section of the fourth pipeline; the liquid outlet of the filter device S-7 is connected to the water inlet of the membrane device S-3 through the second section of the fourth pipeline.

[0018] In one embodiment of the utility model, it also includes a first flushing water outlet pipe and a second flushing water outlet pipe; the second pipe includes a first section and a second section, the first section and the second section of the second pipe are connected to the first flushing water outlet pipe through a tee, and the first flushing water outlet pipe is provided with a first flushing water outlet valve V08; the third pipe includes a first section and a second section, the first section and the second section of the third pipe are connected to the second flushing water outlet pipe through a tee, and the second flushing water outlet pipe is provided with a second flushing water outlet valve V07.

[0019] In one embodiment of the utility model, it also includes a valve system, which includes the second valve VM04, the sixth valve VM03, and a raw water pump inlet valve V01 arranged on the first pipeline outside the inlet of the raw water pump S-2, a raw water pump outlet valve V02 arranged on the first pipeline outside the outlet of the raw water pump S-2, a membrane device water inlet valve VM01 arranged on the first pipeline outside the water inlet of the membrane device S-3, a fresh water valve V06 arranged on the third pipeline, a cleaning pump inlet valve V03 arranged on the fourth pipeline outside the inlet of the cleaning pump S-6, a cleaning pump outlet valve V04 arranged on the fourth pipeline outside the outlet of the cleaning pump S-6, a membrane device cleaning water inlet valve VM06 arranged on the fourth pipeline outside the water inlet of the membrane device S-3, and a membrane device cleaning fresh water valve VM05 arranged on the fifth pipeline. In addition, equipment can be added or reduced based on the present device according to specific installation needs. For example, a raw water pump check valve Z01 can be provided on the outlet pipe outside the raw water pump S-2, and a cleaning pump check valve Z02 can be provided on the outlet pipe outside the cleaning pump S-6.

[0020] In one embodiment of the utility model, it also includes a liquid level detection system, a conductivity detection system, and a pressure detection system. The liquid level detection system includes a raw water level detection device L01 arranged in the raw water tank S-1, a produced water level detection device L03 arranged in the produced water tank S-4, and a cleaning water level detection device L02 arranged in the cleaning water tank S-5; the conductivity detection system includes a raw water conductivity detection device C01 arranged on the first pipeline, and a produced water conductivity detection device C02 arranged on the third pipeline; the pressure detection system includes a raw water level detection device L01 arranged on the first pipeline outside the outlet of the raw water pump S-2 A pump outlet pressure detection device P01, a membrane device inlet pressure detection device P02 arranged on the first pipeline outside the water inlet of the membrane device S-3, a fresh water pressure detection device P03 arranged on the third pipeline outside the second outlet, a concentrated water pressure detection device P04 arranged on the first interface pipe outside the first outlet, a cleaning pump outlet pressure detection device P05 arranged on the fourth pipeline outside the outlet of the cleaning pump S-6, a filter device inlet pressure detection device P06 arranged on the fourth pipeline outside the liquid inlet of the filter device S-7, and a filter device outlet pressure detection device P07 arranged on the fourth pipeline outside the liquid outlet of the filter device S-7.

[0021] In one embodiment of the present invention, an automatic control system is further included, and the automatic control system is connected to the valve system, the liquid level detection system, the conductivity detection system, and the pressure detection system respectively.

[0022] In one embodiment of the utility model, the cleaning water tank S-5 is also provided with a circulating water outlet, and the circulating water outlet is connected to the fourth pipe between the filtering device S-7 and the cleaning pump S-6 through a seventh pipe, and a cleaning circulation valve V05 is provided on the seventh pipe, and the cleaning circulation valve V05 is connected to the automatic control system.

[0023] In one embodiment of the present invention, the membrane device S-3 is provided with a reverse osmosis membrane element with high flux and low desalination rate, and the membrane element is installed vertically in the membrane device S-3.

[0024] When the device disclosed in the utility model is used, it comprises the following steps:

[0025] (1) The pretreated wastewater enters S-1, and V01, V02, VM01, VM02, VM04, V06, and V09 are opened;

[0026] (2) Start S-2, wastewater enters S-3 from S-1, and adjust V09 to make P02 reach 0.4MPa-0.6MPa. Organic matter is adsorbed by the S-3 membrane element. When the fresh water flow rate / concentrated water flow rate decreases by 15%, it means that the membrane element is saturated with adsorption. Stop operation, stop S-2, and close V01, V02, VM01, VM02, VM04, V06, and V09. Prepare to start the cleaning step;

[0027] (3) Start the cleaning step: inject the prepared cleaning solution into S-5, open V03, V04, VM06, VM05, and VM03. Start S-6, cycle cleaning for 1-6 hours, stop S-6, close V03, V04, VM06, VM05, and VM03, and the cleaning is finished;

[0028] (4) After cleaning, enter the flushing stage: open V01, V02, VM01, VM02, VM04, V07, V08, start S-2, flush for 30 minutes, stop S-2, and close V01, V02, VM01, VM02, VM04, V07, V08. After flushing, enter the standby state;

[0029] (5) After flushing, the system can enter the next operation state.

[0030] The device disclosed in the utility model can purify wastewater containing organic matter. The wastewater stored in the raw water tank S-1 enters the membrane device S-3 through the raw water pump S-2. The organic matter is adsorbed by the membrane element in the membrane device S-3. The organic matter in the wastewater is removed, and the produced water enters the produced water tank S-4 through the first outlet, the second outlet, the first interface pipe, the second pipeline, and the third pipeline. When the adsorption of the membrane element in the membrane device S-3 reaches saturation, the wastewater treatment process is stopped, the membrane element is cleaned, and the prepared cleaning liquid is loaded into the cleaning water tank S-5, and then enters the filter device S-7 through the cleaning pump S-6 for filtration, and then enters the membrane device S-3 from the water inlet of the membrane device S-3 to chemically clean the membrane element. The cleaning water flows back to the cleaning water tank S-5 from the first outlet, the third outlet, the first interface pipe, the sixth pipeline, and the fifth pipeline, and the adsorption capacity of the membrane element after chemical cleaning is restored. Then, raw water is pumped from the raw water tank S-1 to the membrane device S-3 through the raw water pump S-2 for flushing. The flushing water is discharged through the first outlet, the second outlet, the first interface pipe, the second pipeline, the first flushing water outlet pipe, the third pipeline, and the second flushing water outlet pipe. After the flushing is completed, the entire device can be used for wastewater treatment again. The device disclosed in the utility model is particularly suitable for the medium color / wastewater reuse system. After the medium water / wastewater is treated by the device, the organic matter in the water can be removed, delaying or avoiding the risk of reverse osmosis membrane contamination in the prior art.

[0031] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 on the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] Unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wastewater treatment device, characterized in that: Including raw water tank, raw water pump, membrane device, production water tank, cleaning water tank, and cleaning pump, The membrane device is provided with a water inlet, a first outlet, a second outlet, and a third outlet, wherein the first outlet is externally connected to a first interface pipe; The raw water tank is provided with a raw water outlet, the raw water outlet is connected to the water inlet of the membrane device through a first pipeline, and the raw water pump is arranged on the first pipeline; The water production box is provided with a water production inlet, the water production inlet and the first interface pipe are connected through a second pipeline, and a second valve is provided on the second pipeline; the water production inlet and the second outlet are connected through a third pipeline; The cleaning water tank is provided with a cleaning water outlet and a cleaning return water inlet. The cleaning water outlet is connected to the water inlet of the membrane device via a fourth pipe, and the cleaning pump is arranged on the fourth pipe; the cleaning return water inlet is connected to the third outlet of the membrane device via a fifth pipe; the cleaning return water inlet is connected to the first interface pipe via a sixth pipe, and a sixth valve is arranged on the sixth pipe.

2. A wastewater treatment device according to claim 1, characterized in that: It also includes a filtering device, which is provided with a liquid inlet and a liquid outlet; the fourth pipeline includes a first section and a second section; the liquid inlet of the filtering device is connected to the cleaning water outlet through the first section of the fourth pipeline, and the cleaning pump is arranged on the first section of the fourth pipeline; the liquid outlet of the filtering device is connected to the water inlet of the membrane device through the second section of the fourth pipeline.

3. A wastewater treatment device according to claim 2, characterized in that: It also includes a first flushing water outlet pipe and a second flushing water outlet pipe; the second pipe includes a first section and a second section, the first section and the second section of the second pipe are connected to the first flushing water outlet pipe through a tee, and the first flushing water outlet pipe is provided with a first flushing water outlet valve; the third pipe includes a first section and a second section, the first section and the second section of the third pipe are connected to the second flushing water outlet pipe through a tee, and the second flushing water outlet pipe is provided with a second flushing water outlet valve.

4. A wastewater treatment device according to claim 3, characterized in that: It also includes a valve system, which includes the second valve, the sixth valve, and a raw water pump inlet valve arranged on the first pipe outside the raw water pump inlet, a raw water pump outlet valve arranged on the first pipe outside the raw water pump outlet, a membrane device water inlet valve arranged on the first pipe outside the membrane device water inlet, a fresh water valve arranged on the third pipe, a cleaning pump inlet valve arranged on the fourth pipe outside the cleaning pump inlet, a cleaning pump outlet valve arranged on the fourth pipe outside the cleaning pump outlet, a membrane device cleaning water inlet valve arranged on the fourth pipe outside the membrane device water inlet, and a membrane device cleaning fresh water valve arranged on the fifth pipe.

5. A wastewater treatment device according to claim 4, characterized in that: It also includes liquid level detection system, conductivity detection system, and pressure detection system. The liquid level detection system includes a raw water liquid level detection device disposed in the raw water tank, a produced water liquid level detection device disposed in the produced water tank, and a cleaning water liquid level detection device disposed in the cleaning water tank; The conductivity detection system includes a raw water conductivity detection device disposed on the first pipeline, and a produced water conductivity detection device disposed on the third pipeline; The pressure detection system includes a raw water pump outlet pressure detection device arranged on the first pipeline outside the raw water pump outlet, a membrane device inlet pressure detection device arranged on the first pipeline outside the membrane device water inlet, a fresh water pressure detection device arranged on the third pipeline outside the second outlet, a concentrated water pressure detection device arranged on the first interface pipe outside the first outlet, a cleaning pump outlet pressure detection device arranged on the fourth pipeline outside the cleaning pump outlet, a filter device inlet pressure detection device arranged on the fourth pipeline outside the filter device liquid inlet, and a filter device outlet pressure detection device arranged on the fourth pipeline outside the filter device liquid outlet.

6. A wastewater treatment device according to claim 5, characterized in that: It also includes an automatic control system, which is connected to the valve system, the liquid level detection system, the conductivity detection system, and the pressure detection system respectively.

7. A wastewater treatment device according to claim 6, characterized in that: The cleaning water tank is also provided with a circulating water outlet, and the circulating water outlet is connected to the fourth pipe between the filtering device and the cleaning pump through a seventh pipe. The seventh pipe is provided with a cleaning circulation valve, and the cleaning circulation valve is connected to the automatic control system.

8. A wastewater treatment device according to any one of claims 1 to 6, characterized in that: The membrane device is provided with a reverse osmosis membrane element with high flux and low desalination rate, and the membrane element is installed vertically in the membrane device.

Images