CN217868542U - Water treatment system for low-temperature environment - Google Patents

Abstract

The utility model is suitable for the field of sewage treatment, and provides a water treatment system for low-temperature environment, which comprises a methane tank, a medicament treatment module, a reverse osmosis module and a heating mechanism; the medicament treatment module is used for mixing and reacting the sewage with a water treatment agent, and the water treatment agent is at least one of a flocculating agent and a coagulant; the reverse osmosis module is the rear stage of the medicament treatment module and is provided with a concentrated solution outlet and a penetrating fluid outlet; the reverse osmosis module is used for reverse osmosis of the sewage, separating concentrated solution and penetrating fluid, and discharging the concentrated solution and the penetrating fluid through a concentrated solution outlet and a penetrating fluid outlet respectively; the concentrated solution outlet is communicated with the heating mechanism; the heating mechanism is used for heating the concentrated solution and inputting the heated concentrated solution into the methane tank; the system has the advantages of reducing cost and increasing operation stability.

Description

Water treatment system for low-temperature environment

Technical Field

The utility model relates to a sewage treatment field, concretely relates to water treatment system for low temperature environment.

Background

The pig farm liquid dung is high concentration organic liquid dung and features high COD, ammonia nitrogen, TP and solid particle content and bad smell. If the water is directly discharged into the water body, the water body eutrophication can be caused, the ecological balance of the water body is destroyed, and the environment is seriously influenced. The liquid manure must be treated using water treatment equipment to be discharged. However, the pollution indexes (such as ammonia nitrogen value and COD value) in the fecal water are too high and probably cannot meet the water inlet standard of the water treatment equipment in the prior art, so the fecal water must be treated by a front-stage treatment before the treatment of the water treatment equipment.

The biogas pool can ferment the liquid dung in the farm into biogas slurry, and can also produce biogas in the fermentation process. However, the methane tank is greatly influenced by temperature during fermentation, and when the temperature is lower than a certain temperature, the methane generating speed and efficiency of the methane tank are low, so that subsequent methane utilization cannot be carried out.

Reverse osmosis, also known as reverse osmosis, is a membrane separation operation that separates a solvent from a solution using a pressure difference as a driving force, and is widely used in sewage treatment. The feed liquid on one side of the membrane is pressurized to obtain permeate on the low pressure side and concentrate on the high pressure side of the membrane when the pressure exceeds its osmotic pressure. The concentrated solution needs further treatment to reach the discharge standard, and is usually electrolyzed by using a three-dimensional electrolysis technology, but the three-dimensional electrolysis needs more electric energy consumption.

In addition, for many farms, the accumulated liquid dung cannot be effectively and timely solved because the farms do not have complete sewage treatment capability by themselves; after the manure is piled up for a period of time, as water in the manure pit evaporates, the manure pit and a sewer pipe communicated with the manure pit are all caked and crusted, and manure in the manure pit is thickened, even if the accumulated manure is taken out for treatment, the accumulated manure is difficult to treat, and the environment of a farm is extremely seriously damaged.

SUMMERY OF THE UTILITY MODEL

The utility model provides a water treatment system for low temperature environment aims at solving the problem that current plant liquid dung is difficult to solve.

In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:

a water treatment system for low-temperature environment comprises a methane tank, a medicament treatment module, a reverse osmosis module and a heating mechanism;

the medicament treatment module is used for mixing and reacting sewage with a water treatment agent, and the water treatment agent is at least one of a flocculating agent and a coagulating agent;

the reverse osmosis module is a rear stage of the medicament treatment module and is provided with a concentrated solution outlet and a penetrating fluid outlet; the reverse osmosis module is used for reverse osmosis of the sewage, separating concentrated solution and penetrating fluid, and discharging the concentrated solution and the penetrating fluid through a concentrated solution outlet and a penetrating fluid outlet respectively; the concentrated solution outlet is communicated with the heating mechanism; the penetrating fluid is clear water after the treatment, and the concentrated solution needs further treatment;

the heating mechanism is used for heating the concentrated solution and inputting the heated concentrated solution into the methane tank. The heating mechanism can be a combination of a boiler, a pipeline and a booster pump, and concentrated liquid is pushed by the booster pump to pass through the boiler along the pipeline to be heated and then enters a discharging chamber of the methane tank along the pipeline.

Usually, concentrated solution generated by reverse osmosis equipment needs to be purified by adopting modes such as three-dimensional electrolysis and the like, but the three-dimensional electrolysis needs to consume more electric energy; in addition, the solid particle content in the sewage collecting tank and the discharge chamber of the methane tank is extremely high, so that the accumulated sewage is difficult to pump out for treatment, water is often added into the sewage collecting tank for dilution, and the cost is further increased by additionally adjusting water from other places and pouring the water into the sewage collecting tank.

Therefore, in the system, the concentrated solution is poured into the sewage collecting tank or the discharge chamber of the methane tank again to dilute the sewage, although the concentrated solution belongs to the sewage which can be discharged only through further purification according to the environmental protection index, the solid particle content of the concentrated solution is greatly reduced compared with the sewage in the methane tank, and the concentrated solution is poured into the methane tank, so that the energy is saved (the concentrated solution needs to be further electrolyzed by a three-dimensional electrolysis device according to the normal treatment flow), the sewage in the methane tank can be diluted, the sewage treatment device can normally operate, and the cost increased by water transfer is avoided. Therefore, the circulating system has the advantages of reducing cost and increasing running stability when being used as a circulating system.

The system can be applied to the condition of low temperature, and the concentrated solution is heated by the heating mechanism and then enters the discharge chamber of the methane tank, so that the concentrated solution can not only dilute liquid dung in the methane tank after entering the methane tank, prevent the liquid dung in the methane tank from caking and crusting, but also improve the temperature of the methane liquid, increase the fermentation speed of the methane liquid and improve the gas production speed of the methane liquid.

Further, still include dirty pond of collection, dirty pond of collection is used for holding sewage and as the place of diluting sewage. The sewage collecting tank is used as a tank for temporarily storing biogas slurry; in addition, when the temperature is higher, the biogas pool can normally produce biogas without heating biogas slurry. At the moment, the concentrated solution directly flows back to the sewage collecting tank, and sewage is diluted in the sewage collecting tank.

Further, be equipped with the solid-liquid separation module between dirty pond of collection and medicament processing module, the solid-liquid separation module is the preceding stage of medicament processing module for separate out the solid in the sewage. Specifically, the solid-liquid separation module can comprise a solid-liquid separator or a screw stacking machine and other devices capable of separating solids; the sewage after the solid is separated can enter the medicament treatment module through a pipeline or other conveying devices.

Further, still include and take out dirty pump, take out dirty pump front and back end and communicate dirty pond of collection and solid-liquid separation module respectively, take out dirty pump and be arranged in drawing sewage and make sewage pump go into the solid-liquid separation module from the dirty pond of collection. Specifically, in order to adapt to the severe conditions in the sewage collection tank, the sewage pumping pump is preferably a submersible sewage pump; when the solid-liquid separation module is a solid-liquid separator, the submersible sewage pump is communicated with an inlet of the solid-liquid separator through a pipeline.

Furthermore, a coarse filtration module is arranged between a clear liquid outlet of the medicament treatment module and the reverse osmosis module; the rough filtering module is at least one of a quartz sand filter, an activated carbon filter, a bag filter and a ceramic membrane filter; the water treated by the medicament treatment module is firstly subjected to rough filtration by the rough filtration module and then enters the reverse osmosis module for reverse osmosis so as to meet the water inlet condition of the reverse osmosis module; the aperture of the filtering hole in the coarse filtering module is larger than the membrane aperture of the permeable membrane in the reverse osmosis module.

Further, the sewage treatment device also comprises a stirring device which extends into the sewage collecting pool and stirs objects in the sewage collecting pool; the stirring device is used for breaking up the solid in the sewage collecting tank or driving the thick substances in the sewage collecting tank to flow. The stirring device is added to break up the lumpy matters in the liquid dung and stir the liquid dung in the sewage collection pool to assist the sewage pump to pump the liquid dung out. The stirring device can be an auger originally installed in the sewage collecting tank, and can also be an additional independent device formed by combining a motor, a stirring shaft and a helical blade on the stirring shaft.

Further, the reverse osmosis module is a DTRO module or a STRO module.

Further, the medicament treatment module comprises a container, a lifting filter element, a water pumping mechanism and a medicament adding mechanism; the lifting filter element is arranged in the container; the dosing mechanism is used for adding water treatment agent into a container, and the container is a place for purification reaction; the purification reaction comprises flocculation or coagulation reaction; the lifting type filter element is used for separating clear liquid from floccules after purification reaction, and the water pumping mechanism is used for pumping out the clear liquid in the lifting type filter element.

Further, the methane tank comprises a fermentation chamber, and a feeding chamber and a discharging chamber which are positioned at two sides of the fermentation chamber; a water storage room is built close to the outer side wall of the fermentation chamber, and at least one part of the water storage room is positioned in the geothermal layer; the water storage chamber is used for injecting water, and the water is used for absorbing heat of the geothermal layer and heating the biogas slurry in the fermentation chamber.

The solar heat collecting device is communicated with the heat exchange tube through a heat supply circulating pipeline; the heat exchange pipe is arranged in a fermentation chamber of the methane tank. The solar heat collecting equipment can be a solar water heater, and when the temperature is low, the solar heat collecting equipment is used for injecting hot water into the heat exchange tube to heat the biogas slurry, so that the fermentation speed of the biogas slurry is increased.

The utility model has the advantages that:

1. the system has the advantages of reducing cost and increasing operation stability;

generally, concentrated solution generated by reverse osmosis equipment needs to be purified by adopting modes such as three-dimensional electrolysis and the like, but the three-dimensional electrolysis needs to consume more electric energy; in addition, the solid particle content in the sewage collecting tank and the discharge chamber of the methane tank is extremely high, so that the accumulated sewage is difficult to pump out for treatment, water is often added into the sewage collecting tank for dilution, and the cost is further increased by additionally adjusting water from other places and pouring the water into the sewage collecting tank.

Therefore, in the system, the concentrated solution is poured into the sewage collecting tank or the discharge chamber of the methane tank again to dilute the sewage, although the concentrated solution belongs to the sewage which can be discharged only through further purification according to the environmental protection index, the solid particle content of the concentrated solution is greatly reduced compared with the sewage in the methane tank, and the concentrated solution is poured into the methane tank, so that the energy is saved (the concentrated solution needs to be further electrolyzed by a three-dimensional electrolysis device according to the normal treatment flow), the sewage in the methane tank can be diluted, the sewage treatment device can normally operate, and the cost increased by water transfer is avoided. In addition, when the concentrated solution flows back to the methane tank, the nutrient components in the concentrated solution can be partially or completely converted into methane, so that the yield of the methane can be improved. Therefore, the circulating system has the advantages of reducing cost and increasing running stability when being used as a circulating system.

2. The system can have two operation modes according to the temperature, and can still ensure the normal fermentation speed of the methane tank when the temperature is lower.

When the temperature is higher, the methane tank can normally produce methane without heating the methane liquid. At the moment, the concentrated solution directly flows back to the sewage collecting tank, and sewage is diluted in the sewage collecting tank.

When the temperature is lower, the concentrated solution is heated by the heating mechanism and then enters the discharging chamber of the methane tank, and after entering the methane tank, the concentrated solution can not only dilute liquid dung in the methane tank and prevent the liquid dung in the methane tank from caking and crusting, but also improve the temperature of the methane liquid, increase the fermentation speed of the methane liquid and improve the gas production speed of the methane liquid.

3. The combined treatment of the methane tank and the sewage treatment device can greatly reduce the COD index and the ammonia nitrogen index of the sewage;

the biogas digester ferments the liquid dung into biogas slurry, after the biogas slurry is completely fermented, pollution indexes (such as ammonia nitrogen value and COD value) in the biogas slurry can be greatly reduced, insect eggs in the liquid dung can be killed, and the purification pressure of water treatment equipment is reduced; meanwhile, methane can be generated in the fermentation process.

The medicament treatment module is used for making sewage produce flocculation or coagulation reaction, reduces the solid particle quantity in the sewage, and subsequent reverse osmosis module processing in addition makes sewage can reach the water purification standard, and the specific visible attached drawing.

The system has the advantages of reducing cost and increasing running stability; is particularly suitable for sewage treatment of farms with caking in the manure pit caused by untimely treatment of liquid dung; through the treatment of the system, the COD index and the ammonia nitrogen index of the sewage can be greatly reduced.

Drawings

FIG. 1 is a schematic diagram of a water treatment system for use in a low temperature environment;

FIGS. 2 and 3 are schematic diagrams of a water treatment system for use in a low temperature environment;

FIG. 4 is a schematic view of a portion of an agitation apparatus;

fig. 5 is a schematic structural view (front view) of a filter element of the medicament treatment module at the lowermost end;

FIG. 6 is a schematic view (side view) of the cartridge of the medication treatment module at the lowermost end;

fig. 7 is a schematic view (side view) of the cartridge of the medication treatment module at the uppermost end;

fig. 8 is a schematic view (front view) of the medicament treatment module with the filter element at the lowermost end.

In the figure: 1. a flow sensor; 2. a liquid pump; 3. a water pumping pipe; 4. a liquid level sensor; 5. a liquid inlet pipe; 6. a rotating shaft; 7. a filter element; 8. a container; 9. a magnetic levitation reverse water collector; 10. a support leg; 11. a drain valve; 12. a discharge pipe; 13. a motor; 14. a first gear; 15. a second gear; 16. a bearing; 17. an electric control lifting driving mechanism; 18. a lifting platform; 19. a support;

100. a medicament processing module; 200. a sewage collecting tank; 300. a reverse osmosis module; 400. a solid-liquid separation module; 500. a sewage pumping pump; 600. a coarse filtration module; 700. a biogas generating pit; 800. a solar energy collection device; 900. a stirring device; 1000. a heat exchange tube; 1100. a boiler; 1200. a booster pump.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following description will be made clearly and completely in conjunction with the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Water treatment system for low-temperature environment

As shown in fig. 1-4, a water treatment system for low temperature environment comprises a methane tank 700, a chemical treatment module 100, a reverse osmosis module 300 and a heating mechanism;

the agent treatment module 100 is used for mixing and reacting sewage with a water treatment agent, wherein the water treatment agent is at least one of a flocculating agent and a coagulant;

the reverse osmosis module 300 is a rear stage of the medicament treatment module and has a concentrated solution outlet and a penetrating fluid outlet; the reverse osmosis module is used for reverse osmosis of the sewage, separating out concentrated solution and penetrating fluid, and discharging the concentrated solution and the penetrating fluid through a concentrated solution outlet and a penetrating fluid outlet respectively; the concentrated solution outlet is communicated with the heating mechanism; the penetrating fluid is clear water after the treatment, and the concentrated solution needs further treatment;

the heating mechanism is used for heating the concentrated solution and inputting the heated concentrated solution into the methane tank 700. The heating mechanism can be a combination of a boiler 1100, a pipeline and a booster pump 1200, and concentrated liquid is pushed by the booster pump 1200 to pass through the boiler 1100 along the pipeline to be heated, and then enters a discharging chamber of the methane tank along the pipeline.

Further, a sewage collecting tank 200 is also included, and the sewage collecting tank 200 is used for containing sewage and serving as a place for diluting the sewage. The sewage collecting tank is used as a tank for temporarily storing biogas slurry; in addition, when the temperature is higher, the biogas pool can normally produce biogas without heating biogas slurry. At the moment, the concentrated solution directly flows back to the sewage collecting tank, and sewage is diluted in the sewage collecting tank.

Further, be equipped with solid-liquid separation module 400 between dirty pond of collection and medicament treatment module, solid-liquid separation module 400 is the preceding stage of medicament treatment module for separate out the solid in the sewage. Specifically, the solid-liquid separation module can comprise a solid-liquid separator or a screw stacking machine and other devices capable of separating solids; the sewage after the solid is separated can enter the medicament treatment module through a pipeline or other conveying devices.

Further, still include and take out dirty pump 500, take out dirty pump 500 front and back end and communicate dirty pond of collection and solid-liquid separation module respectively, take out dirty pump and be arranged in drawing sewage and making sewage pump go into the solid-liquid separation module from the dirty pond of collection. Specifically, in order to adapt to the severe conditions in the sewage collection tank, the sewage pumping pump is preferably a submersible sewage pump; when the solid-liquid separation module is a solid-liquid separator, the submersible sewage pump is communicated with the inlet of the solid-liquid separator through a pipeline.

Further, a coarse filtration module 600 is arranged between the clear liquid outlet of the medicament treatment module and the reverse osmosis module; the rough filtering module 600 is at least one of a quartz sand filter, an activated carbon filter, a bag filter and a ceramic membrane filter; the water treated by the medicament treatment module is firstly coarsely filtered by the coarse filtering module and then enters the reverse osmosis module for reverse osmosis so as to meet the water inlet condition of the reverse osmosis module; the aperture of the filtering hole in the coarse filtering module is larger than the membrane aperture of the permeable membrane in the reverse osmosis module.

In some embodiments, the sewage treatment device further comprises a stirring device 900, wherein the stirring device 900 extends into the sewage collecting tank and stirs objects in the sewage collecting tank; the stirring device is used for breaking up the solid in the sewage collecting tank or driving the thick substances in the sewage collecting tank to flow. The stirring device is added to break up lumps in the liquid dung and stir the liquid dung in the sewage collecting tank so as to assist the sewage pump to pump the liquid dung out. The stirring device can be an auger originally installed in the sewage collecting tank, and can also be an additional independent device formed by combining a motor, a stirring shaft and a helical blade on the stirring shaft. In the embodiment, the stirring device is an independent stirring device and comprises a motor box provided with a stirring motor, a rotating shaft of the stirring motor is connected with a stirring shaft through a coupler, the stirring shaft extends into the sewage collecting tank, and the stirring shaft is connected with a plurality of stirring rods; the motor box is arranged on a floater; the floater floats on the sewage, and the stirring motor starts to drive the stirring shaft to rotate, so as to drive the stirring rod to rotate.

Further, the reverse osmosis module is a DTRO module or a STRO module.

Further, the medicament treatment module comprises a container, a lifting filter element, a water pumping mechanism and a medicament adding mechanism; the lifting filter element is arranged in the container; the dosing mechanism is used for adding water treatment agent into a container, and the container is a place for purification reaction; the purification reaction comprises flocculation or coagulation reaction; the lifting filter element is used for separating clear liquid from floccules after purification reaction, and the water pumping mechanism is used for pumping out the clear liquid in the lifting filter element.

Further, the methane tank comprises a fermentation chamber, and a feeding chamber and a discharging chamber which are positioned at two sides of the fermentation chamber; a water storage room is built close to the outer side wall of the fermentation chamber, and at least one part of the water storage room is positioned in the geothermal layer; the water storage chamber is used for injecting water, and the water is used for absorbing heat of the geothermal layer and heating the biogas slurry in the fermentation chamber.

Further, the solar heat collecting device 800 is further included, and the solar heat collecting device 800 is communicated with the heat exchange pipe 1000 through a heat supply circulating pipeline; the heat exchange pipe 1000 is located in the fermentation chamber of the biogas digester. The solar heat collecting equipment can be a solar water heater, and when the temperature is low, the solar heat collecting equipment is used for injecting hot water into the heat exchange tube to heat the biogas slurry, so that the fermentation speed of the biogas slurry is increased.

The utility model discloses a concrete theory of operation: generally, concentrated solution generated by reverse osmosis equipment needs to be purified by adopting modes such as three-dimensional electrolysis and the like, but the three-dimensional electrolysis needs to consume more electric energy; in addition, the solid particle content in the sewage collecting tank and the discharge chamber of the methane tank is extremely high, so that the accumulated sewage is difficult to pump out for treatment, water is often added into the sewage collecting tank for dilution, and the cost is further increased by additionally adjusting water from other places and pouring the water into the sewage collecting tank.

Therefore, in the system, the concentrated solution is poured into the sewage collecting tank or the discharge chamber of the methane tank again to dilute the sewage, although the concentrated solution belongs to the sewage which can be discharged only through further purification according to environmental protection indexes, compared with the sewage in the methane tank, the content of solid particles is greatly reduced, and the concentrated solution is poured into the methane tank, so that not only can energy be saved (according to a normal treatment process, the concentrated solution needs to be further electrolyzed by a three-dimensional electrolysis device), but also the sewage in the methane tank can be diluted, the sewage treatment device can normally operate, and the cost of water transfer increase is avoided. Therefore, the circulating system has the advantages of reducing cost and increasing running stability.

When the system is applied to the condition of low air temperature, the concentrated solution is heated by the heating mechanism and then enters the discharge chamber of the methane tank, and after entering the methane tank, the concentrated solution can not only dilute liquid dung in the methane tank and prevent the liquid dung in the methane tank from caking and crusting, but also improve the temperature of the methane liquid and the fermentation speed of the methane liquid, so that the gas production speed of the methane liquid is improved.

(II) medicament treatment module

As shown in fig. 5 to 8, the medicament treatment module is a barrel-type intelligent water treatment device with a rotary filter element, and comprises a container 8, a filter element 7, a filter element lifting mechanism, a liquid inlet pipe 5, a dosing mechanism, a liquid pumping mechanism and a discharging mechanism; the filter element is arranged in the container; a plurality of filter holes are arranged on the barrel wall of the filter element; the filter element is a rotary filter element; the filter element lifting mechanism comprises a lifting platform and an electric control lifting driving mechanism 17; an electric control lifting driving mechanism; for example, the lifting platform is connected with the container, or fixed on the ground, or fixed on other supports; the motion direction of the electric control lifting driving mechanism is the same as the axial direction of the filter element; the electric control lifting driving mechanism can also be a hydraulic push rod or an electric push rod; the lifting platform is provided with a bearing, and the rotating shaft 6 of the filter element is inserted in the bearing; the lifting platform is also provided with a motor 13 and a transmission mechanism for driving the rotating shaft to rotate; the lifting platform is connected with the filter element and is used for driving the filter element to lift; the liquid inlet pipe is used for guiding water to be purified into the container, and a liquid inlet valve is arranged on a liquid supply pipeline of the liquid inlet pipe; the dosing port of the dosing mechanism is arranged above the ignition container on the outer wall of the container and is used for feeding the water treatment medicament into the container; the medicine can be added through another pipe or directly added with solid or powder medicine;

the discharging mechanism comprises a discharging pipe 12 arranged at the bottom of the container and used for discharging waste materials and a discharging valve 11 arranged on the discharging pipe;

the liquid pumping mechanism comprises a liquid pump 2 and a water pumping pipe 3 connected with the liquid pump, and the lower end of the water pumping pipe is positioned at the bottom in the filter element and used for pumping out the filtered water in the filter element. The liquid pump is preferably a suction water pump.

The liquid pump is an external liquid pump;

a liquid level detection module is arranged on the container; the liquid level detection module can directly adopt a liquid level sensor or convert the liquid level into liquid level by adopting other sensors, for example, a flowmeter at a water inlet pipe is adopted, the liquid level is converted by flow and the cross section area of a container, and the liquid level can also be converted by hydraulic data acquired by a pressure sensor, because the pressure at the bottom of the liquid is in direct proportion to the liquid level;

the intelligent medicament treatment module further comprises a control module, and the control module is used for controlling the actions of the filter element lifting mechanism, the liquid inlet valve, the liquid pumping mechanism and the discharge valve. The control module can be a relay control module or a control module based on an MCU (microprogrammed control Unit), wherein the MCU is a singlechip, a PLC (programmable logic controller), an ARM (advanced RISC machine) processor or a DSP (digital signal processor);

the number of the electric control lifting driving mechanisms is at least 2; the static part of the electric control lifting driving mechanism is fixed on the container or the external bracket. The structure is compact, the whole equipment forms integrated equipment, and the electric control lifting driving mechanism comprises a static part and a moving part; when the device is operated, the static part does not operate, and the moving part extends and retracts;

the liquid inlet pipe is an annular liquid inlet pipe, a plurality of water outlet holes are formed in the pipe wall of the liquid inlet pipe, and the annular liquid inlet pipe is located at the opening of the container and fixed on the inner wall of the container; the diameter of the annular liquid inlet pipe is larger than the outer diameter of the filter element.

The liquid inlet pipe is fixed on the container; the diameter of the inner ring of the annular pipe is larger than the outer diameter of the filter element; the filter element can be ensured to be lifted on the annular pipe, so that the water outlet of the annular pipe can clean the outer wall of the filter element;

the rotating shaft is a hollow rotating shaft, and the water pumping pipe is positioned in a through hole of the rotating shaft.

The liquid pump is arranged on the ground outside the outer barrel or on a support on the ground.

The container is an outer barrel, and the bottom of the outer barrel is provided with supporting legs 10 for supporting.

The inner wall of the container is provided with a liquid level detection module; the liquid level detection module can directly adopt level sensor, or adopt other sensors conversion to the liquid level, if adopt the flowmeter of inlet tube department, through the cross-sectional area of flow and container, convert the liquid level, also can convert the liquid level into through the hydraulic data that pressure sensor gathered, because the pressure and the liquid level of liquid bottom are directly proportional, level sensor 4 is preferred to the liquid level detection module, and level sensor links to each other with the controller. The number of the liquid level sensors is preferably 2, one liquid level sensor is arranged at the higher end of the container and used for detecting the highest water level, and the other liquid level sensor is arranged at the lower end of the container and used for detecting the lowest water level;

the water outlet pipe is provided with a flow sensor 1 which is connected with a controller.

The bottom of the filter element is provided with a magnetic levitation reverse water collector 9, and the magnetic levitation reverse water collector is positioned outside the filter element. When water exists, the magnetic levitation reverse water collector seals a pipeline of the magnetic levitation reverse water collector under the action of buoyancy, and when no water exists, a channel is opened, and impurities are discharged from a pipe opening.

Description of the procedure: when intaking, waste water jets out the outer wall in order to wash the filter core from the apopore, designs the apopore certain angle of slope, and the cleaning performance is better like this. Specifically, the angle of inclination is 1-30 degrees, preferably 10-20 degrees, so that the angle of the discharged water deviates from the radial direction by a certain angle, such as 10-20 degrees.

It will be understood that modifications and variations are possible to those skilled in the art in light of the above teachings and that all such modifications and variations are considered to be within the purview of the invention as set forth in the appended claims.

Claims (10)

1. A water treatment system for low-temperature environment is characterized by comprising a methane tank (700), a medicament treatment module (100), a reverse osmosis module (300) and a heating mechanism;

the medicament treatment module (100) is used for mixing and reacting sewage with a water treatment agent, wherein the water treatment agent is at least one of a flocculating agent and a coagulant;

the reverse osmosis module (300) is a rear stage of the medicament treatment module (100) and is provided with a concentrated solution outlet and a penetrating fluid outlet; the reverse osmosis module (300) is used for reverse osmosis of the sewage, separating concentrated solution and penetrating fluid, and discharging the concentrated solution and the penetrating fluid through a concentrated solution outlet and a penetrating fluid outlet respectively; the concentrated solution outlet is communicated with the heating mechanism;

the heating mechanism is used for heating the concentrated solution and inputting the heated concentrated solution into the methane tank (700).

2. A water treatment system for low temperature environment according to claim 1, further comprising a sewage collecting tank (200), said sewage collecting tank (200) being used for containing sewage and as a place for diluting sewage.

3. The water treatment system for the low-temperature environment according to claim 2, wherein a solid-liquid separation module (400) is arranged between the sewage collecting tank (200) and the chemical treatment module, and the solid-liquid separation module (400) is a front stage of the chemical treatment module and is used for separating out solids in sewage.

4. The water treatment system for the low-temperature environment as claimed in claim 3, further comprising a sewage pumping pump (500), wherein the front end and the rear end of the sewage pumping pump (500) are respectively communicated with the sewage collecting tank and the solid-liquid separation module (400), and the sewage pumping pump (500) is used for pumping sewage from the sewage collecting tank and pumping the sewage into the solid-liquid separation module.

5. A water treatment system for low temperature environment according to claim 1, characterized in that a coarse filtration module (600) is provided between the clear liquid outlet of the agent treatment module and the reverse osmosis module; the aperture of the filtering holes in the coarse filtering module (600) is larger than the membrane aperture of the permeable membrane in the reverse osmosis module.

6. A water treatment system for a low temperature environment according to claim 2, further comprising an agitation means (900), said agitation means (900) extending into the catch basin and agitating the contents thereof; the stirring device is used for breaking up the solid in the sewage collecting tank or driving the thick substances in the sewage collecting tank to flow.

7. The water treatment system for a cryogenic environment of claim 1 wherein the reverse osmosis module is a DTRO module or a STRO module.

8. The water treatment system for a low temperature environment of claim 1, wherein the chemical treatment module comprises a container, a lifting filter element, a water pumping mechanism and a dosing mechanism; the lifting filter element is arranged in the container; the dosing mechanism is used for adding water treatment agent into a container, and the container is a place for purification reaction; the purification reaction comprises flocculation or coagulation reaction; the lifting type filter element is used for separating clear liquid from floccules after purification reaction, and the water pumping mechanism is used for pumping out the clear liquid in the lifting type filter element.

9. The water treatment system for low temperature environment as claimed in claim 1, wherein the biogas generating pit (700) comprises a fermentation chamber and a feeding room and a discharging room at both sides of the fermentation chamber; a water storage room is built close to the outer side wall of the fermentation chamber, and at least one part of the water storage room is positioned in the geothermal layer; the water storage chamber is used for injecting water, and the water is used for absorbing heat of the geothermal layer and heating the biogas slurry in the fermentation chamber.

10. A water treatment system for low temperature environment according to claim 9, further comprising a solar heat collecting device (800), wherein the solar heat collecting device (800) is communicated with the heat exchanging pipe (1000) through a heat supplying circulating pipeline; the heat exchange pipe (1000) is arranged in a fermentation chamber of the methane tank.

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