CN109437493B - Urban inland river repair system based on continuous flow injection - Google Patents
Urban inland river repair system based on continuous flow injection Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/066—Overpressure, high pressure
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/40—Protecting water resources
- Y02A20/402—River restoration
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses an urban inland river restoration system based on continuous flow injection, which comprises an intelligent control unit, an air injection aeration unit, a circulating filtration and transmission unit and a plant purification unit, wherein the intelligent control unit is connected with the air injection aeration unit; the intelligent control unit is used for controlling the water body treatment degree and speed; an air injection aeration unit for increasing microbial decomposition by injecting oxygen; the circulating filtration and transmission unit is used for filtering and adsorbing impurities in water, and cleaning the filtration and adsorption pad through a high-pressure water gun to realize cyclic utilization; a plant purification unit; the method is used for treating the cleaned dirt, thereby achieving the purpose of repairing the urban inland river. The invention has the comprehensive effects of intelligent control, wide application range, cyclic utilization, restoration of urban inland rivers and beautification of living environment.
Description
Technical Field
The invention relates to urban inland river restoration, in particular to an urban inland river restoration system based on continuous flow injection.
Background
With the continuous development of social economy, on one hand, urban residents are continuously increased, the discharge amount of domestic sewage is also increased, meanwhile, a plurality of enterprise factories are arranged along the bank of the urban inland river, the sewage discharged by the factories is large in amount and poor in water quality, and the ecological system of the urban inland river is seriously influenced. On the other hand, the living standard of people is continuously improved, the requirements on living environment are also increasingly increased, and furthermore, because odorous substances such as ammonia nitrogen, sulfide, volatile organic acid and the like are generated in polluted urban rivers under the anoxic condition, the human health is threatened, so that the tolerance of people to the polluted urban rivers is lower and lower. Therefore, the restoration of urban inland rivers and the residents of Qingshan Bishui have become the key point for beautifying cities and carrying out sustainable development.
In order to restore the ecology of urban inland rivers and eliminate the black and odorous water body, the scheme I in the prior art is as follows: oxygen is input into the black and odorous water body, so that the oxygen concentration of the water body is improved, and the aim of purifying the urban rivers and lakes is fulfilled; scheme II: the urban inland river pollution control effect is achieved through sedimentation, filtration and aerobic and anaerobic multi-process treatment; the third scheme is as follows: the urban inland river is treated by utilizing plant roots in the planting bed which can float on the water surface and microorganisms in the aeration pipe.
The above solution of the prior art has the following drawbacks: for example, sludge formed by dead plants and microorganisms is difficult to clean, or equipment is difficult to recycle, so that the cost is high, and the problems become the difficulty of urban inland river restoration.
Disclosure of Invention
The purpose is as follows: in order to overcome the defects in the prior art, the invention provides an urban inland river restoration system based on continuous flow injection.
The technical scheme is as follows: in order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides an urban inland river repair system which characterized in that: comprises an intelligent control unit, an air injection aeration unit, a circulating filtration and transmission unit and a plant purification unit;
the intelligent control unit is used for controlling the water body treatment degree and speed;
the air injection aeration unit is used for increasing the decomposition of microorganisms in water by injecting oxygen;
the circulating filtration transmission unit comprises a filtration and adsorption pad which is used for purifying the water body through the adsorption and filtration effect to realize the restoration of the water body; meanwhile, the filtering and adsorbing pad is cleaned by a high-pressure water gun to realize cyclic utilization;
the plant purification unit; the method is used for treating the cleaned dirt, thereby achieving the purpose of repairing the urban inland river.
As the preferred scheme, city inland river repair system, its characterized in that: the air injection aeration unit comprises an air injector, an aeration pipe and an aeration box;
the circulating filtration transmission unit comprises a purification box, a filtration adsorption pad, a transmission wheel, a power-assisted transmission belt, a high-pressure water gun and a booster pump;
the plant purification unit comprises a sewage collection tank, a water suction pump, a water suction pipe and a plant wind and light band;
the air injector is communicated with an aeration pipe, and the aeration pipe is positioned in the aeration box; the bottom of the aeration box is provided with a water outlet which can be opened and closed;
the power-assisted conveyor belt is arranged on more than two conveying wheels in a matching way and can circularly move along the arrangement of the conveying wheels, the filtering and adsorbing pad is detachably arranged on the conveying wheels, and at least part of the moving route of the power-assisted conveyor belt is positioned in the purifying box; the water outlet of the aeration box is positioned on a filtering adsorption pad in the purification box and is used for adsorbing and filtering water;
the purification box is connected with a high-pressure water gun through a water outlet pipe and a booster pump, and is used for flushing the filtering and adsorbing pad by using purified water through the high-pressure water gun, so that the filtering and adsorbing pad can be conveniently recycled;
and a water suction pump is installed at an outlet of the sewage collection tank, and water is introduced into the plant wind-light band through a water suction pipe.
Further, the circulation filtration transmission unit also comprises an impeller; the impeller is connected with the conveying wheel; the impeller is arranged at the water outlet of the purification box and used for driving the impeller to rotate under the action of water flow.
Furthermore, the width of the filtering and adsorbing pad is the same as that of the purifying box, and the boosting conveyor belt is 3-4cm narrower than the filtering and adsorbing pad, so that water flows out after being filtered.
Furthermore, the transfer gear is located the purifying box left and right ends, and every end is two, totally four transfer gears, and every transfer gear respectively connects an impeller.
Furthermore, anti-skid rubber is arranged on the position, which is in contact with the power-assisted conveying belt, of the conveying wheel; the filtering and adsorbing pad is made of haydite zeolite and is connected with the power-assisted conveying belt through adsorbing fibers.
Further, the air injection aeration unit also comprises an air compressor and a peristaltic pump; an outlet of the air compressor is communicated to an air injector through a peristaltic pump and a pipeline; oxygen is conveyed to the air injector through the air compressor and the peristaltic pump and then is injected into the aeration pipe through the air injector.
As the preferred scheme, city inland river repair system, its characterized in that: the intelligent control unit comprises:
the injector speed regulator is used for regulating the injection speed of the air injector;
the peristaltic pump speed regulator is used for regulating the speed of the peristaltic pump;
and the booster pump speed regulator is used for regulating the speed of the booster pump so as to adapt to various water flow conditions.
As the preferred scheme, city inland river repair system, its characterized in that: the material of the conveying wheel is stainless steel, and the aeration pipe is made of plastic.
As the preferred scheme, city inland river repair system, its characterized in that: and a filter screen is arranged at the outlet of the water pumping pipe and used for filtering impurities. Furthermore, the filter screen is made of stainless steel.
Has the advantages that: the urban inland river restoration system based on continuous flow injection is convenient and fast to operate and can be recycled; the water flow is continuously injected, and urban inland rivers can be effectively treated through the dual functions of adsorption and aeration, so that a better treatment effect is obtained. The method can provide a method for repairing the urban inland river, realizes the purification of the water body, and has the characteristics of good effect, lower cost, energy conservation and convenient maintenance. Compared with the prior art, the method has the remarkable advantages that:
(1) the intelligent control unit can adjust the pump speed in multiple gears to adapt to various water flow conditions.
(2) The power of the power-assisted conveyor belt is derived from the purified water flow, and no external power is needed, so that energy is saved.
(3) The filtering adsorption pad can be repeatedly used after being washed by the high-pressure water gun, does not need to be frequently replaced, and effectively reduces the cost.
(4) Water in the high-pressure water gun is from purified water, and other water flows are not needed, so that water resources are effectively saved.
(5) The flushed sewage and sludge enter the sewage collecting tank and then are led into the plant wind and light band, so that the problem that sewage is difficult to treat is effectively solved, and meanwhile, the plant wind and light band plays a role in beautifying the environment.
Drawings
FIG. 1 is a schematic structural diagram of an urban inland river remediation system in an embodiment;
fig. 2 is a schematic sectional view of the urban inland river remediation system in an embodiment.
In the figure: 1. an injector speed regulator; 2. a peristaltic pump speed regulator; 3. a booster pump speed regulator; 4. an air compressor; 5. a peristaltic pump; 6. an air injector; 7. an aeration pipe; 8. a transfer wheel; 9. a power-assisted conveyor belt; 10. a filtration and adsorption pad; 11. a scattering high-pressure water gun; 12. an impeller; 13. a purification box; 14. a booster pump; 15. a sewage collecting tank; 16. a water pump; 17. a water pumping pipe; 18. a filter screen; 19. the plant wind-light belt; 20. an aeration tank.
Detailed Description
The present invention will be further described with reference to the following examples.
As shown in fig. 1 and 2, an urban inland river restoration system based on continuous flow injection comprises an intelligent control unit, an air injection aeration unit, a circulating filtration and transmission unit and a plant purification unit;
the intelligent control unit comprises an injector speed regulator 1, a peristaltic pump speed regulator 2 and a booster pump speed regulator 3;
the air injection aeration unit comprises an air compressor 4, a peristaltic pump 5, an air injector 6, an aeration pipe 7 and an aeration box 20;
the circulating filtration transmission unit comprises a transmission wheel 8, a power-assisted transmission belt 9, a filtration adsorption pad 10, a scattering high-pressure water gun 11, an impeller 12, a purification box 13 and a booster pump 14;
the plant purification unit comprises a sewage collecting tank 15, a water suction pump 16, a water suction pipe 17, a filter screen 18 and a plant wind and light band 19.
The intelligent control unit is used for controlling the water body treatment degree and speed;
the air injection aeration unit is used for increasing the decomposition of microorganisms in water by injecting oxygen;
the circulating filtration transmission unit comprises a filtration and adsorption pad 10 which is used for purifying the water body through the adsorption and filtration effect to realize the restoration of the water body; meanwhile, the filtering and adsorbing pad is cleaned by a high-pressure water gun to realize cyclic utilization;
the plant purification unit; the method is used for treating the cleaned dirt, thereby achieving the purpose of repairing the urban inland river.
Wherein the intelligent control unit comprises:
the injector speed regulator 1 is used for regulating the injection speed of the air injector 6;
the peristaltic pump speed regulator 2 is used for regulating the speed of the peristaltic pump 5;
and the booster pump speed regulator 3 is used for regulating the speed of the booster pump 14 so as to adapt to various water flow conditions.
The outlet of the air compressor 4 is communicated to an air injector 6 through a peristaltic pump 5 and a pipeline; the air injector 6 is communicated with an aeration pipe 7, and the aeration pipe 7 is positioned in an aeration box; the bottom of the aeration box is provided with a water outlet which can be opened and closed; oxygen is delivered to an air injector 6 by an air compressor 4 and a peristaltic pump 5, and then injected into an aeration pipe 7 by the air injector 6. Preferably, the aeration pipe 7 is made of plastic.
The circulating filtration conveying unit is characterized in that the power-assisted conveyor belt 9 is arranged on more than two conveying wheels 8 in a matching way and can move circularly along the arrangement of the conveying wheels 8, the filtration adsorption pad 10 is detachably arranged on the conveying wheels 8, and at least part of the moving route of the power-assisted conveyor belt 9 is positioned in the purifying box 13; the water outlet of the aeration tank 20 is positioned on the filtering and adsorbing pad 10 in the purification tank 13 and is used for adsorbing and filtering water;
the purification box 13 is connected with the high-pressure water gun 11 through a water outlet pipe and a booster pump 14, and is used for washing the filtering and adsorbing pad 10 by using purified water through the high-pressure water gun 11, so that the filtering and adsorbing pad can be conveniently recycled;
further, the circulation filtration conveying unit also comprises an impeller 12; the impeller 12 is connected with the transmission wheel 8; the impeller 12 is installed at a water outlet of the purifying box 13 and used for driving the impeller 12 to rotate under the action of water flow.
Furthermore, the boosting conveyor belt 9 is made of rubber materials at the contact part with the conveying wheel 8, and the filtering and adsorbing pad 10 is made of adsorbing materials such as haydite zeolite and is positioned in the purifying box when positioned at the top end, so as to play a role in filtering and adsorbing; the width of the filtering and adsorbing pad 10 is the same as that of the purifying box 13, and the boosting conveyor belt 9 is 3-4cm narrower than the filtering and adsorbing pad 10, so that water can flow out after being filtered.
Further, the filtering and adsorbing pad 10 is connected with the power-assisted conveying belt 9 through adsorbing fibers.
Further, a scattering high-pressure water gun 11 is positioned below the conveyor belt, so as to facilitate washing of the filtering and adsorbing pad 10 positioned at the lower end.
In this embodiment, the transmission wheels 8 are located at the left end and the right end of the purification box, each end has two transmission wheels, and the total number of the transmission wheels is four, each transmission wheel 8 is connected with one impeller 12, and the total number of the impellers 12 is four, and the impellers 12 are installed on the pipe wall of the water outlet pipeline. The outlet pipe sets up 3 shunt tubes more than, and booster pump 14 and scattering high pressure squirt 11 are all installed to every shunt tube.
Plant purification unit, dirty groove 15 bottom installation suction pump 16 of collection, introduce plant wind light area 19 with water through drinking-water pipe 17, filter screen 18 is settled to drinking-water pipe 17 exit for filter great impurity. Furthermore, the water pumping pipe 17 is made of plastic, the filter screen 18 is made of stainless steel, and the plants in the plant wind and light band 19 are made of species with vigorous vitality and beautiful shapes, such as yellow iris, canna and the like.
The air injection aeration unit and the circulating filtration transmission unit act together, the air injection aeration unit ensures the sufficiency of oxygen and can strengthen the degradation function of microorganisms, and the circulating filtration transmission unit purifies the water body through the adsorption filtration effect to realize the restoration of the water body.
Further, the purifying box 13 is made of plastic, the aeration pipe 7 is made of plastic, the boosting conveyor belt 9 is made of rubber, the filtering and adsorbing pad 10 is made of light materials such as ceramsite and zeolite, the boosting conveyor belt 9 and the filtering and adsorbing pad 10 are connected through adsorption fibers, the conveying wheel 8 is made of stainless steel, and the impeller 12 is made of stainless steel.
The specific operation steps of the present invention are further described below with reference to fig. 1 and 2:
the invention provides an urban inland river restoration system based on continuous flow injection.
The method comprises the following steps: the square pipe is preferably selected as the purifying box 13, so that the parts, penetrating out, of the power-assisted conveying belts at the two ends of the purifying box 13 and the filtering and adsorbing pad 10 are sealed, a hole with the size identical to that of the air injector 6 is drilled at the top of the purifying box 13, two water outlet lines are arranged at the bottom of the purifying box, and one line is used for driving the impeller 12 and delivering water to the scattering high-pressure water gun 11.
Step two: the air compressor 4 and the peristaltic pump 5 are connected with the air injector 6 through hoses, the air injector 6 penetrates through a hole at the top of the purification box 13 and is sealed, and the aeration pipe 7 is connected with the air injector 6 inside the purification box 13.
Step three: two conveying wheels 8 are respectively fixed at the left end and the right end of the purifying box 13, the power-assisted conveying belt 9 is sleeved on the conveying wheels 8, and the filtering and adsorbing pad 10 is connected with the power-assisted conveying belt 9 through adsorbing fibers. Four impellers 12 are arranged on the wall of one purifying box pipeline, and each impeller 12 is connected with one transmission wheel 8 through a belt.
Step four: four shunt tubes are arranged behind the impeller 12, each shunt tube is provided with a booster pump 14 and a scattering high-pressure water gun 11, and the scattering high-pressure water guns 11 are distributed in all directions of the bottom filtering and adsorbing pad 10.
Step five: the sewage collecting groove 15 is arranged below the scattering high-pressure water gun 11, the upper part of the sewage collecting groove is slightly longer than the length of the filtering and adsorbing pad, the water suction pump 16 is arranged below the sewage collecting groove, the water suction pipe 17 is used for introducing sewage into the plant anemoscope strip, and the iris citrifolia, the canna indica and the like are planted in the plant anemoscope strip.
Step six: after entering the purifying box 13, the water flow is purified by the aeration pipe 7 and the filtering and adsorbing pad 10, and then a part of the water flow flows out, and the other part of the water flow impacts the impeller 12, so that the impeller 12 rotates and drives the conveying wheel 8 to rotate through the belt, and then the power-assisted conveying belt 9 and the filtering and adsorbing pad 10 rotate. The water flow passing through the impeller 12 enters the shunt pipe, is pressurized by the booster pump 14, is ejected by the scattering high-pressure water gun 11, and washes the filtering and adsorbing pad 10 rotating to the lower part. The sewage generated after flushing enters a sewage collecting tank 15, flows into a plant wind and light band 19 through a water suction pump 16, a water suction pipe 17 and a filter screen 18, and finishes the urban inland river repairing work.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (7)
1. The utility model provides an urban inland river repair system which characterized in that: comprises an intelligent control unit, an air injection aeration unit, a circulating filtration and transmission unit and a plant purification unit;
the intelligent control unit is used for controlling the water body treatment degree and speed;
the air injection aeration unit comprises an air injector, an aeration pipe and an aeration box and is used for increasing the decomposition effect of microorganisms in water by injecting oxygen;
the circulating filtration transmission unit comprises a purification box, a filtration adsorption pad, a transmission wheel, a power-assisted transmission belt, a high-pressure water gun and a booster pump; the device is used for purifying the water body through the adsorption and filtration effect to realize the restoration of the water body; meanwhile, the filtering and adsorbing pad is cleaned by a high-pressure water gun to realize cyclic utilization;
the plant purification unit comprises a sewage collection tank, a water suction pump, a water suction pipe and a plant wind and light band; the sewage treatment device is used for treating the cleaned sewage, so that the aim of repairing the urban inland river is fulfilled;
the air injector is communicated with an aeration pipe, and the aeration pipe is positioned in the aeration box; the bottom of the aeration box is provided with a water outlet which can be opened and closed;
the power-assisted conveyor belt is arranged on more than two conveying wheels in a matching way and can circularly move along the arrangement of the conveying wheels, the filtering and adsorbing pad is detachably arranged on the conveying wheels, and at least part of the moving route of the power-assisted conveyor belt is positioned in the purifying box; the water outlet of the aeration box is positioned on a filtering adsorption pad in the purification box and is used for adsorbing and filtering water;
the purification box is connected with a high-pressure water gun through a water outlet pipe and a booster pump, and is used for flushing the filtering and adsorbing pad by using purified water through the high-pressure water gun, so that the filtering and adsorbing pad can be conveniently recycled;
a water suction pump is arranged at an outlet of the sewage collecting tank, and water is introduced into the plant wind-light band through a water suction pipe;
the air injection aeration unit also comprises an air compressor and a peristaltic pump; an outlet of the air compressor is communicated to an air injector through a peristaltic pump and a pipeline; oxygen is conveyed to an air injector through an air compressor and a peristaltic pump and then is injected into an aeration pipe through the air injector;
the intelligent control unit comprises:
the injector speed regulator is used for regulating the injection speed of the air injector;
the peristaltic pump speed regulator is used for regulating the speed of the peristaltic pump;
and the booster pump speed regulator is used for regulating the speed of the booster pump so as to adapt to various water flow conditions.
2. The urban inland river remediation system of claim 1, wherein: the circulating filtration transmission unit also comprises an impeller; the impeller is connected with the conveying wheel; the impeller is arranged at the water outlet of the purification box and used for driving the impeller to rotate under the action of water flow.
3. The urban inland river remediation system of claim 1, wherein: the width of the filtering and adsorbing pad is the same as that of the purifying box, and the boosting conveyor belt is 3-4cm narrower than the filtering and adsorbing pad, so that water can flow out after being filtered.
4. The urban inland river remediation system of claim 2, wherein: the transfer gear is located the purifying box left and right ends, and every end is two, totally four transfer gears, and every transfer gear respectively connects an impeller.
5. The urban inland river remediation system of claim 1, wherein: the anti-skid rubber is arranged on the conveying wheel in contact with the power-assisted conveying belt; the filtering and adsorbing pad is made of haydite zeolite and is connected with the power-assisted conveying belt through adsorbing fibers.
6. The urban inland river remediation system of claim 1, wherein: the material of the conveying wheel is stainless steel, and the aeration pipe is made of plastic.
7. The urban inland river remediation system of claim 1, wherein: and a filter screen is arranged at the outlet of the water pumping pipe and used for filtering impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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