CN209872587U - High-turbidity and high-phosphorus sewage rapid purification equipment - Google Patents
High-turbidity and high-phosphorus sewage rapid purification equipment Download PDFInfo
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- CN209872587U CN209872587U CN201920197212.1U CN201920197212U CN209872587U CN 209872587 U CN209872587 U CN 209872587U CN 201920197212 U CN201920197212 U CN 201920197212U CN 209872587 U CN209872587 U CN 209872587U
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Abstract
The utility model discloses a high turbidity, high phosphorus sewage rapid purification equipment. When phosphorus-containing compounds are adsorbed by the phosphorus removal agent, flocculating products are generated, and further serious secondary pollution is caused. The utility model discloses a module of intaking, dephosphorization desilt system, denitrogenation system and play water recoil module. The phosphorus and mud removing system comprises a phosphorus and mud removing floating pool, a partition plate, a drainage plate, a flow dividing three-way pipe, a phosphorus removing agent adding component, a sludge treatment system and a backflow gas dissolving system. The water inlet module comprises a sewage collecting tank and a sewage lifting pump. The sludge treatment system comprises a clear water separation pipeline, a slag scraper, a sludge transition box, a sludge flow channel, a sludge storage box, a sludge pressing pump and a filter press; the backflow gas dissolving system comprises a gas dissolving pump, a gas dissolving tank body, a backflow pump and a backflow water outlet pipe. The utility model adds the phosphorus removing agent into the treated wastewater before mud-water separation; the phosphorus removing agent adsorbs flocculate formed by the phosphorus-containing compounds in the process of being treated, and can be removed in the process of sludge-water separation.
Description
Technical Field
The utility model belongs to the technical field of the environmental protection equipment, concretely relates to high turbidity, high phosphorus sewage rapid purification equipment.
Background
With the industrial development, the speed increase of urbanization and the expansion of population quantity, China faces a very severe environmental situation. The I-III type water quality section of the main watershed in China accounts for 64.2 percent, the inferior V type accounts for 17.2 percent, wherein the watershed of the sea river is heavily polluted, and the watershed of the yellow river, the Huaihe river and the Liaohe river are moderately polluted. The eutrophication problem of lakes (reservoirs) is still outstanding, and the monitoring of the nutritional states of 56 lakes (reservoirs) shows that 3 lakes with moderate eutrophication account for 5.2 percent; 10 of the mild eutrophic food accounts for 17.2 percent. Although the country started the governance of the three lakes of the three rivers after 1995 (the three rivers: Liaohe, Haihe, Huaihe, the three lakes: Taihu, nido lake, Dian lake), these areas are still in a state of serious pollution at present. The river and lake water bodies almost become super sewage disposal ditches along with the high-speed promotion of industrialization, and due to the fact that a large amount of organic pollutants are received, serious eutrophication is caused, and the use value is lost due to the outbreak of algae. Besides industrial sewage, a large amount of domestic sewage exists, and the discharge amount of the domestic sewage in 2011 nationwide is 428 hundred million tons, which is increased by 12.7 percent on a year-by-year basis and accounts for 65 percent of the total discharge amount of wastewater in the country. Moreover, water pollution is still deteriorating, spreading from side streams to main streams, from cities to rural areas, from the surface to the ground, from land to the ocean.
Surface water pollution becomes a sensitive problem which is regarded as important globally, further deterioration of a water body is controlled, and the polluted water body is repaired slowly. Because surface water has the characteristics of large water quantity, wide distribution and the like, the pollution treatment cannot be carried out on the surface water by adopting the traditional treatment processes and equipment such as coagulating sedimentation, adsorption, extraction, ion exchange, membrane separation and the like domestic sewage or industrial wastewater, so that great difficulty is brought to the surface water pollution treatment. Meanwhile, when the phosphorus-containing compound is adsorbed by the phosphorus removal agent, a product in the form of a flocculating constituent is generated; when the product is mixed with high-turbidity sewage, serious secondary pollution is caused.
Disclosure of Invention
An object of the utility model is to provide a high turbidity, high phosphorus sewage rapid purification equipment.
The utility model discloses a module of intaking, dephosphorization desilt system, denitrogenation system and play water recoil module. The phosphorus and mud removing system comprises a phosphorus and mud removing floating pool, a partition plate, a drainage plate, a flow dividing three-way pipe, a phosphorus removing agent adding component, a sludge treatment system and a backflow gas dissolving system. And a partition plate is arranged in the phosphorus removal floating mud tank. The phosphorus removal floating mud tank is divided into a phosphorus removal area and a mud-water separation area by the partition plate. The bottom of the partition plate is provided with a liquid through port. And a drainage plate is fixed at the bottom of the mud-water separation area. The bottom of drainage plate is close to the logical liquid mouth setting of division board, and the one side of removing the phosphorus district is kept away from to the top slope orientation.
The water inlet module comprises a sewage collecting tank and a sewage lifting pump. The water inlet of the sewage lift pump is communicated with the inner cavity of the sewage collecting tank, and the water outlet of the sewage lift pump is connected with the water inlet at the top of the dephosphorization zone in the dephosphorization sludge floating tank. The phosphorus removing agent adding assembly comprises a phosphorus removing dosing box and a dosing pump. The medicine outlet of the dephosphorization dosing box is communicated with the water inlet of the dosing pump. The water outlet of the dosing pump is connected with a dosing port at the top of the dephosphorization zone in the dephosphorization floating sludge tank.
The sludge treatment system comprises a clear water separation pipeline, a slag scraper, a sludge transition box, a sludge flow channel, a sludge storage box, a sludge pressing pump and a filter press; the slag scraper is arranged at the top of the mud-water separation zone. The sludge transition box is fixed in the sludge-water separation zone and is positioned below the end of the sludge scraper far away from the phosphorus removal zone. One end of the sludge flow channel is connected with a sludge output port at the bottom of the sludge transition box, and the other end of the sludge flow channel is connected with the top of the inner cavity of the sludge storage box. The bottom of the sludge storage box is provided with a sludge outlet. The input port of the mud-pressing pump is connected with the mud storage box, and the output port is connected with the mud input port of the filter press. And a clear water separation pipeline is arranged at the bottom of the mud-water separation area. The clear water separation pipeline is provided with a clear water inlet. And a clear water outlet of the clear water separation pipeline is connected with a first water through port of the shunt three-way pipe.
The backflow air dissolving system comprises an air dissolving pump, an air dissolving tank body, a backflow pump and a backflow water outlet pipe. The top of the gas dissolving tank body is provided with a first-stage backflow inlet and a second-stage backflow inlet, and the bottom of the gas dissolving tank body is provided with a backflow outlet and a gas-enriched water outlet. The water inlet of the reflux pump is connected with the second water through hole of the three-way flow dividing pipe. The water outlet of the reflux pump is connected with a first-stage reflux inlet at the top of the dissolved gas tank body. And a backflow outlet at the top of the dissolved air tank body is connected with a liquid inlet of the dissolved air pump. The output port of the dissolved air pump is connected with the second-stage backflow inlet of the dissolved air tank body. The air-increasing water outlet of the air-dissolving tank body is connected with the water inlet end of the backflow water outlet pipe. The water outlet end of the backflow water outlet pipe is positioned between the partition plate and the drainage plate. A third water through opening of the flow dividing three-way pipe is communicated with a water inlet of the water outlet pump; the water outlet of the water outlet pump is connected with the water inlet at the bottom of the overflow water tank.
Furthermore, a flow sensor and an on-off valve are arranged between the water outlet of the sewage lifting pump and the water inlet of the phosphorus removal floating mud tank. An on-off valve is arranged between the water outlet of the dosing pump and a dosing port at the top of the dephosphorization zone in the dephosphorization floating sludge tank. An on-off valve is arranged between the input port of the mud pressing pump and the mud storage tank. An on-off valve is arranged between the output port of the mud pressing pump and the sludge input port of the filter press. A flowmeter and an on-off valve which are connected in series are arranged between the water inlet of the reflux pump and the second water through opening of the flow dividing three-way pipe. An on-off valve is arranged between the water outlet of the reflux pump and the first-stage reflux inlet at the top of the dissolved gas tank body. And a backflow outlet at the top of the dissolved air tank body and a liquid inlet of the dissolved air pump are provided with on-off valves. An on-off valve and a flowmeter are arranged between the output port of the dissolved air pump and the second-stage reflux inlet of the dissolved air tank body. And an on-off valve, a manual valve and a flowmeter are arranged between the aeration water output port of the dissolved air tank body and the water inlet end of the backflow water outlet pipe.
Furthermore, the backflow air dissolving system also comprises a pressure-regulating air pump. The top of the gas dissolving tank body is also provided with a pressure regulating port. And the air outlet of the pressure regulating air pump is connected with a pressure regulating port on the dissolved air tank body.
Furthermore, the aeration pipe is provided with a nanometer aeration hole. And a phosphorus removal agent is filled in the phosphorus removal dosing box.
Further, the slag scraper comprises a conveying wheel, a conveying wheel and a slag scraping plate. The two conveying wheels are respectively supported at the two ends of the top of the mud-water separation area and are connected through the conveying belt. The plurality of slag scraping plates are uniformly distributed and fixed on the outer side surface of the conveying belt.
Furthermore, a plurality of obliquely arranged spoilers are arranged in the dissolved air tank.
Furthermore, the drainage plate and the bottom surface of the phosphorus and mud removing area form an included angle of 60 degrees.
The utility model has the advantages that:
the utility model discloses a to being handled the high pressure injection air in the waste water for slight bubble with by the suspended solid come-up in the waste water of handling, and then realized striking off of suspended solid. Meanwhile, the phosphorus removing agent is added into the treated wastewater before mud-water separation; the floc formed by phosphorus-containing compounds in the phosphorus removal agent adsorption treatment can be removed in the mud-water separation process, so that the secondary pollution generated by phosphorus removal operation is avoided.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in figure 1, the equipment for rapidly purifying the high-turbidity high-phosphorus sewage comprises a water inlet module, a phosphorus and sludge removing system, a water outlet pump 21 and an overflow water tank 22. The phosphorus and mud removing system comprises a phosphorus and mud removing floating pond 1, a partition plate 2, a drainage plate 7, a shunt three-way pipe 20, a phosphorus removing agent adding component, a sludge treatment system and a backflow gas dissolving system. A partition plate 2 is arranged in the phosphorus removal floating mud tank 1. The division plate 2 divides the phosphorus removal floating mud pool 1 into a phosphorus removal area and a mud-water separation area. The bottom of the partition plate 2 is provided with a liquid through port. A drainage plate 7 is fixed at the bottom of the mud-water separation area in the phosphorus removal floating mud tank 1. The bottom of drainage plate 7 is close to the liquid through-hole setting of division board 2, and the one side of removing the phosphorus district is kept away from to the top slope orientation. The drainage plate 7 and the bottom surface of the phosphorus and mud removing area form an included angle of 60 degrees. The drainage plate 7 can enable the treated sewage entering the sludge-water separation area from the phosphorus removal area to flow obliquely upwards along the drainage plate 7. The water inlet module comprises a sewage collecting tank 3 and a sewage lifting pump 4. The sewage lift pump 4 is arranged in the sewage collecting tank 3. The water inlet of the sewage lift pump 4 is communicated with the inner cavity of the sewage collecting tank 3, and the water outlet of the sewage lift pump is connected with the water inlet at the top of the dephosphorization zone in the dephosphorization floating mud tank 1 through a flow sensor and an on-off valve which are connected in series.
The phosphorus removing agent adding component comprises a phosphorus removing dosing box 5 and a dosing pump 6. The phosphorus removal dosing box 5 is filled with a phosphorus removal agent. The phosphorus removal agent adopts a lanthanum chloride solution. A medicine outlet at the bottom of the dephosphorization dosing box 5 is communicated with a water inlet of the medicine feeding pump 6. The water outlet of the dosing pump 6 is connected with a dosing port at the top of the dephosphorization zone in the dephosphorization floating sludge pond 1 through an on-off valve.
The sludge treatment system comprises a clear water separation pipeline 14, a slag scraper 8, a sludge transition box 9, a sludge flow channel 10, a sludge storage tank 11, a mud pressing pump 12 and a filter press 13; the slag scraper 8 comprises a conveying wheel, a conveying wheel and a slag scraping plate. The two conveying wheels are respectively supported at the two ends of the top of the mud-water separation area and are connected through the conveying belt. The plurality of slag scraping plates are uniformly distributed and fixed on the outer side surface of the conveying belt. One of the transmission wheels is driven by a motor. The sludge transition box 9 is fixed in the sludge-water separation zone and is positioned below the end of the sludge scraper 8 far away from the phosphorus removal zone. One end of the sludge flow channel 10 is communicated with a sludge output port at the bottom of the sludge transition box 9, and the other end is communicated with the top of an inner cavity of the sludge storage box 11. The bottom of mud storage box 11 is the infundibulate, and the mud export has been seted up to the lower extreme. The input port of the mud-pressing pump 12 is connected with the mud storage tank 11 through an on-off valve, and the output port is communicated with the mud input port of the filter press 13 through an on-off valve. The bottom of the mud-water separation area is provided with a clean water separation pipeline 14. The clear water separation pipeline 14 is provided with a plurality of clear water inlets. The end of the clean water separation pipeline 14 far away from the drainage plate 7 is provided with a clean water outlet. The clear water outlet of the clear water separation pipeline 14 is connected with the first water opening of the shunt three-way pipe 20.
The backflow air dissolving system comprises an air dissolving pump 15, an air dissolving tank 16, a backflow pump 17, a backflow water outlet pipe 18 and a pressure regulating air pump 19. The top of the gas dissolving tank body 16 is provided with a pressure regulating port, a first-stage backflow inlet and a second-stage backflow inlet, and the bottom is provided with a backflow outlet and a gas-enriched water outlet. A plurality of obliquely arranged spoilers are arranged in the air dissolving tank body 16. The air outlet of the pressure-regulating air pump 19 is connected with a pressure-regulating port on the dissolved air tank 16, so as to control the air pressure in the dissolved air tank 16. The water inlet of the reflux pump 17 is connected with the second water port of the shunt three-way pipe 20. A flow meter and an on-off valve which are connected in series are arranged between the water inlet of the reflux pump 17 and the second water through opening of the flow dividing three-way pipe 20. The water outlet of the reflux pump 17 is connected with the first-stage reflux inlet at the top of the dissolved gas tank 16 through an on-off valve.
The reflux outlet at the top of the dissolved air tank body 16 is connected with the liquid inlet of the dissolved air pump 15 through an on-off valve. The gas inlet of the dissolved air pump 15 is connected to the outside air. The output port of the dissolved air pump 15 is connected with the second-stage backflow inlet of the dissolved air tank body 16 through a series-connected on-off valve and a flow meter. The aeration water output port of the air dissolving tank 16 is connected with the water inlet end of the backflow water outlet pipe 18 through a series connection on-off valve, a manual valve and a flowmeter. The water outlet end of the backflow water outlet pipe 18 is positioned between the partition plate 2 and the drainage plate 7. The spoiler in the dissolved air tank 16 can make the treated wastewater in the dissolved air tank 16 passing through the dissolved air pump 15 and the treated wastewater not passing through the dissolved air pump 15 be mixed uniformly. And a third water through opening of the shunt three-way pipe 20 is communicated with a water inlet of the water outlet pump 21. The water outlet of the water outlet pump 21 is connected with the water inlet at the bottom of the overflow water tank 22
The working principle of the utility model is as follows:
firstly, injecting high-turbidity and high-phosphorus wastewater to be treated into a sewage collecting tank 3 through a sewage discharge outlet; the sewage lift pump 4 is started and the corresponding on-off valve is opened. The treated wastewater of the sewage collecting tank 3 enters a phosphorus removal area of the phosphorus removal floating mud tank 1.
Step two, starting the dosing pump 6, and opening a corresponding on-off valve; so that the phosphorus removing agent in the phosphorus removing dosing tank 5 is pumped into the phosphorus removing area of the phosphorus removing floating sludge tank 1. The phosphorus removing agent in the phosphorus removing area of the phosphorus removing floating mud pool 1 adsorbs elements in the treated wastewater, so that most of phosphorus elements in the treated wastewater are flocculated under the action of the phosphorus removing agent.
And step three, the treated wastewater in the phosphorus removal area of the phosphorus removal floating mud tank 1 enters the mud-water separation area through a liquid through hole at the bottom of the partition plate 2 and flows upwards in an inclined manner under the action of the drainage plate 7. The slag scraper 8, the reflux pump 17 and the dissolved air pump 15 are all started, and the treated wastewater in the dissolved air tank 16 (the wastewater in the tank comes from a phosphorus removal area) is injected with air by the dissolved air pump 15, so that a large amount of micro bubbles are generated in the treated wastewater; after the treated wastewater with the micro-bubbles dispersed in the dissolved air tank 16 is introduced into the phosphorus removal zone, air is attached to suspended particles of the treated wastewater in a highly dispersed micro-bubble form, so that the density is lower than that of water; floating the suspended matters to a slag scraper by using a buoyancy principle; the slag scraper 8 scrapes the floating suspended matters into the sludge transition box 9. Suspended matters in the sludge transition box 9 enter the sludge storage box 11 along with water flow and are precipitated in the sludge storage box 11 to generate sludge. Sludge in the sludge storage tank 11 is pumped into the filter press 13 by the mud pump 12 for treatment. The clear water in the treated wastewater sinks and enters the clear water separation pipeline 14 through a clear water inlet on the clear water separation pipeline 14.
Step four, the treated wastewater output by the clear water separation pipeline 14 is shunted after passing through a shunt three-way pipe 20; one part flows to the overflow water tank 22 and the other part is pumped into the dissolved gas tank 16 by the return pump 17 to inject the gas.
Claims (6)
1. A high-turbidity high-phosphorus sewage rapid purification device comprises a water inlet module, a phosphorus and sludge removing system, a water outlet pump and an overflow water tank; the method is characterized in that: the phosphorus and mud removing system comprises a phosphorus and mud removing floating pool, a partition plate, a drainage plate, a flow dividing three-way pipe, a phosphorus removing agent adding component, a sludge treatment system and a backflow gas dissolving system; a partition plate is arranged in the phosphorus removal floating mud tank; the phosphorus removal floating mud tank is divided into a phosphorus removal area and a mud-water separation area by the partition plate; the bottom of the partition plate is provided with a liquid through port; a drainage plate is fixed at the bottom of the mud-water separation zone; the bottom end of the drainage plate is arranged close to the liquid through port of the partition plate, and the top end of the drainage plate is inclined towards one side far away from the phosphorus removal area;
the water inlet module comprises a sewage collecting tank and a sewage lifting pump; a water inlet of the sewage lifting pump is communicated with an inner cavity of the sewage collecting tank, and a water outlet of the sewage lifting pump is connected with a water inlet at the top of a dephosphorization zone in the dephosphorization sludge floating tank; the phosphorus removing agent adding component comprises a phosphorus removing dosing box and a dosing pump; the medicine outlet of the dephosphorization dosing box is communicated with the water inlet of the dosing pump; the water outlet of the dosing pump is connected with a dosing port at the top of the dephosphorization zone in the dephosphorization floating sludge tank;
the sludge treatment system comprises a clear water separation pipeline, a slag scraper, a sludge transition box, a sludge flow channel, a sludge storage box, a sludge pressing pump and a filter press; the slag scraper is arranged at the top of the mud-water separation zone; the sludge transition box is fixed in the sludge-water separation zone and is positioned below the end of the sludge scraper far away from the phosphorus removal zone; one end of the sludge flow channel is connected with a sludge output port at the bottom of the sludge transition box, and the other end of the sludge flow channel is connected with the top of an inner cavity of the sludge storage box; the bottom end of the sludge storage box is provided with a sludge outlet; the input port of the mud-pressing pump is connected with the mud storage tank, and the output port of the mud-pressing pump is connected with the mud input port of the filter press; the bottom of the mud-water separation zone is provided with a clear water separation pipeline; a clear water inlet is formed in the clear water separation pipeline; a clear water outlet of the clear water separation pipeline is connected with a first water through port of the shunt three-way pipe;
the backflow gas dissolving system comprises a gas dissolving pump, a gas dissolving tank body, a backflow pump and a backflow water outlet pipe; the top of the gas dissolving tank body is provided with a primary backflow inlet and a secondary backflow inlet, and the bottom of the gas dissolving tank body is provided with a backflow outlet and a gas-enriched water outlet; the water inlet of the reflux pump is connected with the second water through port of the three-way flow dividing pipe; the water outlet of the reflux pump is connected with a first-stage reflux inlet at the top of the dissolved gas tank body; a backflow outlet at the top of the dissolved air tank body is connected with a liquid inlet of the dissolved air pump; the output port of the dissolved air pump is connected with the secondary reflux inlet of the dissolved air tank body; the aeration water outlet of the dissolved air tank body is connected with the water inlet end of the backflow water outlet pipe; the water outlet end of the backflow water outlet pipe is positioned between the partition plate and the drainage plate; a third water through opening of the flow dividing three-way pipe is communicated with a water inlet of the water outlet pump; the water outlet of the water outlet pump is connected with the water inlet at the bottom of the overflow water tank.
2. The apparatus for rapidly purifying high-turbidity and high-phosphorus sewage according to claim 1, wherein: a flow sensor and an on-off valve are arranged between the water outlet of the sewage lifting pump and the water inlet of the phosphorus removal floating mud tank; an on-off valve is arranged between the water outlet of the dosing pump and a dosing port at the top of the dephosphorization zone in the dephosphorization floating sludge tank; an on-off valve is arranged between the input port of the mud pressing pump and the mud storage tank; an on-off valve is arranged between the output port of the mud pressing pump and the sludge input port of the filter press; a flow meter and an on-off valve which are connected in series are arranged between the water inlet of the reflux pump and the second water through opening of the flow dividing three-way pipe; an on-off valve is arranged between the water outlet of the reflux pump and the primary reflux inlet at the top of the dissolved gas tank body; a backflow outlet at the top of the dissolved air tank body and a liquid inlet of the dissolved air pump are provided with on-off valves; an on-off valve and a flowmeter are arranged between the output port of the dissolved air pump and the second-stage reflux inlet of the dissolved air tank body; and an on-off valve, a manual valve and a flowmeter are arranged between the aeration water output port of the dissolved air tank body and the water inlet end of the backflow water outlet pipe.
3. The apparatus for rapidly purifying high-turbidity and high-phosphorus sewage according to claim 1, wherein: the backflow air dissolving system also comprises a pressure regulating air pump; the top of the dissolved air tank body is also provided with a pressure regulating port; and the air outlet of the pressure regulating air pump is connected with a pressure regulating port on the dissolved air tank body.
4. The apparatus for rapidly purifying high-turbidity and high-phosphorus sewage according to claim 1, wherein: the slag scraper comprises a conveying wheel, a conveying wheel and a slag scraping plate; the two conveying wheels are respectively supported at the two ends of the top of the mud-water separation area and are connected through the conveying belt; the plurality of slag scraping plates are uniformly distributed and fixed on the outer side surface of the conveying belt.
5. The apparatus for rapidly purifying high-turbidity and high-phosphorus sewage according to claim 1, wherein: a plurality of obliquely arranged spoilers are arranged in the dissolved air tank.
6. The apparatus for rapidly purifying high-turbidity and high-phosphorus sewage according to claim 1, wherein: the drainage plate and the bottom surface of the phosphorus and mud removing area form an included angle of 60 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920197212.1U CN209872587U (en) | 2019-02-14 | 2019-02-14 | High-turbidity and high-phosphorus sewage rapid purification equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920197212.1U CN209872587U (en) | 2019-02-14 | 2019-02-14 | High-turbidity and high-phosphorus sewage rapid purification equipment |
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| Publication Number | Publication Date |
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| CN209872587U true CN209872587U (en) | 2019-12-31 |
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| CN201920197212.1U Active CN209872587U (en) | 2019-02-14 | 2019-02-14 | High-turbidity and high-phosphorus sewage rapid purification equipment |
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| CN (1) | CN209872587U (en) |
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Effective date of registration: 20210706 Address after: Room 1205, block a, 18 Wantang Road, Xihu District, Hangzhou City, Zhejiang Province 310063 Patentee after: ZHEJIANG TAOHUAYUAN ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: Room 201, unit 2, building 8, Hang Seng Science Park, 1218 Wenyi West Road, Cangqian street, Yuhang District, Hangzhou City, Zhejiang Province, 310036 Patentee before: ZHEJIANG ZL RIVER ENVIRONMENTAL TECHNOLOGY Co.,Ltd. |