CN211004983U - Water treatment equipment based on nanofiltration membrane - Google Patents
Water treatment equipment based on nanofiltration membrane Download PDFInfo
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- CN211004983U CN211004983U CN201921578255.0U CN201921578255U CN211004983U CN 211004983 U CN211004983 U CN 211004983U CN 201921578255 U CN201921578255 U CN 201921578255U CN 211004983 U CN211004983 U CN 211004983U
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Abstract
The application discloses water treatment facilities based on receive filter membrane, this water treatment facilities includes: the nanofiltration membrane component is provided with a plurality of groups of nanofiltration membrane units, each nanofiltration membrane unit comprises a nanofiltration membrane and a water pipe, a water inlet of the nanofiltration membrane component is connected to a water outlet of the clean water tank, and a water outlet of the nanofiltration membrane component is connected to a water outlet of the water treatment equipment; the equipment room comprises a high-pressure pump and a water inlet pump, the high-pressure pump and the water inlet pump are sequentially arranged between a water outlet of the clean water tank and a water inlet of the nanofiltration membrane component, the high-pressure pump is used for carrying out pressurization operation on clean water in the clean water tank, and the water inlet pump is used for pumping the pressurized clean water into a water inlet of the nanofiltration membrane component; the control cabinet is electrically connected with the control ends of the high-pressure pump and the water inlet pump, and is used for controlling the high-pressure pump and the water inlet pump. Through the technical scheme in this application, improve sewage treatment's productivity and the stability of quality of water, optimize the utilization ratio of water resource.
Description
Technical Field
The application relates to the technical field of water treatment equipment, in particular to water treatment equipment based on a nanofiltration membrane.
Background
In order to improve the quality of life of residents and solve the problem of daily water consumption, the domestic sewage of the residents needs to be treated, and along with the continuous improvement of the sewage treatment process and the water quality requirement, a sewage treatment system is rapidly developed, in particular to the process technology of a nanofiltration membrane.
In the prior art, the MBR tank is usually only used for filtering sewage, a nanofiltration membrane is not utilized, so that the sewage treatment effect is poor, and meanwhile, the post-treatment cost is high and the water quality is poor.
SUMMERY OF THE UTILITY MODEL
The purpose of this application lies in: the production capacity of sewage treatment and the stability of water quality are improved, and the utilization rate of water resources is optimized.
The technical scheme of the application is as follows: the utility model provides a water treatment facilities based on receive filter membrane, water treatment facilities include equalizing basin, the filtering ponds in grades, desilting pond, membrane grid, biochemical combination pond, MBR pond, clean water basin that communicate in proper order through the pipeline, and this water treatment facilities still includes and receives the filter membrane system, and the water inlet of receiving the filter membrane system is connected in the delivery port of clean water basin, receives the filter membrane system and includes: a nanofiltration membrane component, a control cabinet and a device room; the nanofiltration membrane component is provided with a plurality of groups of nanofiltration membrane units, each nanofiltration membrane unit comprises a nanofiltration membrane and a water pipe, the nanofiltration membrane component is arranged at the water inlet of the nanofiltration membrane system, the water inlet of the nanofiltration membrane component is connected to the water outlet of the clean water tank, and the water outlet of the nanofiltration membrane component is connected to the water outlet of the water treatment equipment; the equipment room comprises a high-pressure pump and a water inlet pump, the high-pressure pump and the water inlet pump are sequentially arranged between a water outlet of the clean water tank and a water inlet of the nanofiltration membrane component, the high-pressure pump is used for carrying out pressurization operation on clean water in the clean water tank, and the water inlet pump is used for pumping the pressurized clean water into a water inlet of the nanofiltration membrane component; the control cabinet is electrically connected with the control ends of the high-pressure pump and the water inlet pump, and is used for controlling the high-pressure pump and the water inlet pump.
In any one of the above technical solutions, further, the nanofiltration membrane assembly further includes: a pressure gauge and a flow meter; the pressure gauge is arranged on the water pipe, a signal output end of the pressure gauge is electrically connected to a first signal input end of the control cabinet, and the pressure gauge is used for detecting the pressure in the water pipe; the flowmeter is arranged at the water inlet or the water outlet of the water pipe, the signal output end of the flowmeter is electrically connected with the second signal input end of the control cabinet, and the flowmeter is used for detecting the flow of clean water in the water pipe.
In any one of the above technical solutions, further, the nanofiltration membrane assembly further includes: a pH sensor; the PH sensor is arranged on the water pipe, the signal output end of the PH sensor is electrically connected to the third signal input end of the control cabinet, and the PH sensor is used for detecting the PH value of clear water in the water pipe.
In any one of the above technical solutions, further, the nanofiltration membrane assembly further includes: a conductivity tester; the conductivity tester is arranged on the water pipe, the signal output end of the conductivity tester is electrically connected with the fourth signal input end of the control cabinet, and the conductivity tester is used for detecting the conductivity of the clean water in the water pipe.
In any one of the above technical solutions, further, the control cabinet further includes: a touch screen; the touch screen is arranged on the front face of the control cabinet shell and used for displaying detection signals received by the control cabinet.
In any one of the above technical solutions, further, the water treatment apparatus further includes: washing the pond with medicine; the equipment room further comprises: a drug washing pump; the water inlet of the drug washing pump is connected with the drug washing tank, the water outlet of the drug washing pump is connected with the water inlet of the nanofiltration membrane component, and the drug washing pump is used for cleaning the nanofiltration membrane unit.
In any one of the above technical solutions, further, the water treatment apparatus further includes: a cleaning tank; the equipment room further comprises: a backwash pump; the water inlet of the backwashing pump is connected with the cleaning pool, the water outlet of the backwashing pump is connected with the water outlet of the nanofiltration membrane component, and the backwashing pump is used for reversely cleaning the nanofiltration membrane unit.
In any one of the above technical solutions, further, the control cabinet further includes: a wireless transmission unit; the wireless transmission unit is used for transmitting the detection signal received by the control cabinet.
The beneficial effect of this application is: by arranging the nanofiltration membrane system, clear water generated by MBR tank treatment is filtered again, which is beneficial to improving the quality of water, improving the effect and production capacity of sewage treatment and saving fresh water resources. The pressure meter and the flowmeter are arranged on the water pipe in the nanofiltration membrane system, so that the pressure and the flow of clean water in the water pipe are detected, the accuracy of a high-pressure pump and a water inlet pump in a control cabinet control device room is improved, and the energy consumption of the high-pressure pump and the water inlet pump is reduced. Through setting up backwash pump and medicine washing pump, wash the filter membrane unit of receiving, improved the life who receives the filter membrane unit, reduced and received the filter membrane unit and used the possibility that leads to blockking up for a long time, improved the reliability of water treatment facilities steady operation.
Drawings
The advantages of the above and/or additional aspects of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
figure 1 is a schematic diagram of a nanofiltration membrane based water treatment apparatus according to an embodiment of the present application;
FIG. 2 is a schematic view of a biochemical combination basin according to one embodiment of the present application.
Detailed Description
In order that the above objects, features and advantages of the present application can be more clearly understood, the present application will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.
As shown in fig. 1, the present embodiment provides a water treatment facilities 10 based on nanofiltration membrane, and water treatment facilities 10 includes equalizing basin 1, hierarchical filtering ponds 2, heavy husky pond 3, membrane grid 4, biochemical combination pond 5, MBR pond 6, clean water basin 7 that communicate in proper order through the pipeline to after clean water basin 7, set up nanofiltration membrane system 8, connect the water inlet of nanofiltration membrane system 8 in the delivery port of clean water basin 7, nanofiltration membrane system 8 includes: a nanofiltration membrane component 81, a control cabinet 83 and an equipment room 82; the nanofiltration membrane component 81 is provided with a plurality of groups of nanofiltration membrane units 811, each nanofiltration membrane unit 811 comprises a nanofiltration membrane and a water pipe, the nanofiltration membrane component 81 is arranged at the water inlet of the nanofiltration membrane system 8, the water inlet of the nanofiltration membrane component 81 is connected to the water outlet of the clean water tank 7, and the water outlet of the nanofiltration membrane component 81 is connected to the water outlet of the water treatment equipment 10;
specifically, the conventional water treatment system 10 includes an adjusting tank 1, a graded filtering tank 2, a sand settling tank 3, a membrane grid 4, a biochemical combination tank 5, an MBR tank 6, and a clean water tank 7, which are sequentially connected by a pipeline, wherein specific devices included therein are not described herein again, in this embodiment, the adopted biochemical combination tank includes an anaerobic biochemical tank, an Anoxic biochemical tank, and an aerobic biochemical tank, as shown in fig. 2, and performs water treatment by using a typical anaerobic-Anoxic-aerobic (a/O) process. In this embodiment, the filter membrane in the MBR tank 6 is one of a microfiltration membrane and an ultrafiltration membrane, and the first filter membrane filtration treatment of the sewage is realized.
In this embodiment, the nanofiltration membrane system 8 is added at the water outlet of the clean water tank 7, and the clean water in the clean water tank 7 is filtered again by the nanofiltration membrane system 8 to perform a second filtration treatment, so as to improve the sewage treatment effect.
In the normal operation process, the control cabinet 83 controls the water producing pump to operate for 7 minutes to produce water, stop for 1 minute and periodically operate, wherein the water producing pneumatic valve corresponding to the water producing pump is continuously opened. The water producing pump utilizes the PID frequency modulation of the frequency converter, thereby the water producing flow is constant, and the calibration water producing flow can be set. The operation of the water producing pump is simultaneously controlled by the liquid level of the membrane pool and transmembrane pressure difference, and is linked with the state of the blower and the corresponding air pipe pneumatic valve.
When water is normally produced, when the liquid level of the gas-water separation tank of a certain series of water production units is reduced to a low level, water production is stopped. And (4) delaying for several seconds to start a corresponding vacuumizing system until the high liquid level of the gas-water separation tank of the water production unit, stopping vacuumizing and recovering water production. If the gas-water separation tank does not reach the high liquid level after a period of time, an alarm is generated, and the alarm is released through manual inspection. The period of the pulse aeration system is 8 minutes, the high aeration time is 2 minutes, and the low aeration time is 6 minutes. Correspondingly, the MBR tank 6 operates in an intermittent operation mode, operates for 5 minutes, stops for 1 minute, and performs primary filtration on the sewage treated by the biochemical combined tank 5, and the MBR tank 6 comprises a Membrane Bioreactor (MBR), and filters the sewage by using a Membrane separation unit and a biological treatment unit, and the filtered clean water is discharged into the clean water tank 7 to be stored, and then performs secondary filtration on the clean water in the clean water tank 7 by using the nanofiltration Membrane system 8.
The nanofiltration membrane system 8 comprises a nanofiltration membrane component 81, a control cabinet 83 and a device room 82, wherein a plurality of groups of nanofiltration membrane units 811 are arranged in the nanofiltration membrane component 81, and the nanofiltration membranes in the nanofiltration membrane units 811 are used for filtering the clean water in the clean water tank 7 again.
Further, the nanofiltration membrane module 81 further includes: pressure gauge 812 and flow meter 813; the pressure gauge 812 is arranged on the water pipe, a signal output end of the pressure gauge 812 is electrically connected to a first signal input end of the control cabinet 83, and the pressure gauge 812 is used for detecting the pressure in the water pipe; the flowmeter 813 is arranged at the water inlet or the water outlet of the water pipe, the signal output end of the flowmeter 813 is electrically connected to the second signal input end of the control cabinet 83, and the flowmeter 813 is used for detecting the flow of the clean water in the water pipe.
Specifically, a pressure gauge 812 and a flow meter 813 are arranged on a water pipe of the nanofiltration membrane component 81, the pressure and the flow of the clean water in the water pipe are detected, the detected signals are transmitted to a signal input end of the control cabinet 83, and the control cabinet 83 controls the high-pressure pump 821 and the water inlet pump 822 respectively according to the detected signals, so that the clean water in the water pipe of the nanofiltration membrane component 81 reaches the set water pressure and flow, and the utilization efficiency of the nanofiltration membrane component 81 is improved.
Further, the nanofiltration membrane module 81 further includes: a pH sensor 814; the PH sensor 814 is arranged on the water pipe, a signal output end of the PH sensor 814 is electrically connected to a third signal input end of the control cabinet 83, and the PH sensor 814 is used for detecting the PH value of the clean water in the water pipe.
Still further, the nanofiltration membrane module 81 further comprises: a conductivity tester 815; the conductivity tester 815 is disposed on the water pipe, a signal output terminal of the conductivity tester 815 is electrically connected to a fourth signal input terminal of the control cabinet 83, and the conductivity tester 815 is used for detecting the conductivity of the clean water in the water pipe.
Specifically, a PH sensor 814 and a conductivity tester 815 are disposed on the water pipe of the nanofiltration membrane assembly 81, so as to detect the PH value and the conductivity of the clean water filtered by the nanofiltration membrane assembly 81, and transmit the detected detection signals to the third signal input end and the fourth signal input end of the control cabinet 83. When the detected pH value and/or conductivity value is abnormal, the control cabinet 83 controls the water treatment equipment to stop working so as to ensure the quality of the produced water.
In this embodiment, the equipment room 82 includes a high-pressure pump 821 and a water inlet pump 822, the high-pressure pump 821 and the water inlet pump 822 are sequentially disposed between the water outlet of the clean water tank 7 and the water inlet of the nanofiltration membrane module 81, the high-pressure pump 821 is configured to perform pressurization operation on clean water in the clean water tank 7, and the water inlet pump 822 is configured to pump pressurized clean water into the water inlet of the nanofiltration membrane module 81;
specifically, the high-pressure pump 821 and the water inlet pump 822 are sequentially arranged in the device, the high-pressure pump 821 performs pressurization operation on the clean water in the clean water tank 7, the pressurized clean water is conveyed to the water inlet pump 822, the pressurized clean water is pumped into the water inlet of the nanofiltration membrane module 81 by the water inlet pump 822, and the pumped clean water is filtered by the nanofiltration membrane.
Preferably, the water treatment apparatus 10 further comprises: washing the pond with medicine; the equipment room 82 further includes: a drug wash pump 824; the water inlet of the drug washing pump 824 is connected to the drug washing tank, the water outlet of the drug washing pump 824 is connected to the water inlet of the nanofiltration membrane component 81, and the drug washing pump 824 is used for cleaning the nanofiltration membrane unit 811.
Specifically, in order to ensure the quality of the clear water filtered by the nanofiltration membrane in the nanofiltration membrane assembly 81, a chemical washing tank and a chemical washing pump 824 are arranged in the water treatment equipment 10, and the chemical washing pump 824 pumps the chemical liquid in the chemical washing tank into a water pipe in the nanofiltration membrane assembly 81 according to a chemical washing instruction sent by the control cabinet 83 to perform chemical washing on the nanofiltration membrane, so as to ensure the safety and sanitation of the nanofiltration membrane and improve the reliability of the quality of the water.
Preferably, the water treatment apparatus 10 further comprises: a cleaning tank; the equipment room 82 further includes: a backwash pump 823; the water inlet of backwash pump 823 is connected to the washing pond, and the water outlet of backwash pump 823 is connected to the delivery port of receive filter membrane subassembly 81, and backwash pump 823 is used for reverse washing receive filter membrane unit 811.
Specifically, in order to guarantee the availability factor of receiving the filter membrane among the filter membrane subassembly 81, prevent that the filter membrane from blockking up, set up washing pond and backwash pump 823 in water treatment facilities 10, reverse pump into the water pipe among the filter membrane subassembly 81 with the washing liquid in the washing pump by backwash pump 823, carry out reverse washing to the filter membrane, prevent that the filter membrane from blockking up because of long-time the use, reduce the availability factor and the life of filter membrane.
In this embodiment, the control cabinet 83 is electrically connected to the control terminals of the high-pressure pump 821 and the water inlet pump 822, and the control cabinet 83 is used for controlling the high-pressure pump 821 and the water inlet pump 822.
Further, the control cabinet 83 further includes: a touch screen; the touch screen is arranged on the front surface of the shell of the control cabinet 83, and the touch screen is used for displaying the detection signal received by the control cabinet 83.
Specifically, the detection signals that can be displayed by the touch screen include the water pressure, the flow rate, the PH value, the conductivity value, and the operation status of each water pump or valve in the equipment room 82. Meanwhile, the touch screen can also send a control instruction like the control cabinet 83 so as to manually adjust the operation condition of the water treatment equipment.
Preferably, the control cabinet 83 further comprises: a wireless transmission unit; the wireless transmission unit is used for transmitting the detection signal received by the control cabinet 83.
Specifically, a wireless transmission unit is arranged in the control cabinet 83, so that data in the control cabinet 83 can be uploaded conveniently, and monitoring of the whole water treatment equipment is improved.
After sewage is treated by the nanofiltration membrane-based water treatment equipment in the embodiment of the application, the quality of outlet water reaches the 'fresh water source' standard and is superior to the 3-class water quality standard in the 'surface water environment quality standard' (GB 3838-2002). The effluent can be used for supplementing water for the wetland, and can also meet the water quality supplementing requirement of a centralized domestic drinking water surface water source and recharge an underground self-contained underground water source.
The technical scheme of the application is explained in detail in the above with reference to the accompanying drawings, and the application provides a nanofiltration membrane-based water treatment device, which comprises: the nanofiltration membrane component is provided with a plurality of groups of nanofiltration membrane units, each nanofiltration membrane unit comprises a nanofiltration membrane and a water pipe, a water inlet of the nanofiltration membrane component is connected to a water outlet of the clean water tank, and a water outlet of the nanofiltration membrane component is connected to a water outlet of the water treatment equipment; the equipment room comprises a high-pressure pump and a water inlet pump, the high-pressure pump and the water inlet pump are sequentially arranged between a water outlet of the clean water tank and a water inlet of the nanofiltration membrane component, the high-pressure pump is used for carrying out pressurization operation on clean water in the clean water tank, and the water inlet pump is used for pumping the pressurized clean water into a water inlet of the nanofiltration membrane component; the control cabinet is electrically connected with the control ends of the high-pressure pump and the water inlet pump, and is used for controlling the high-pressure pump and the water inlet pump. Through the technical scheme in this application, improve sewage treatment's productivity and the stability of quality of water, optimize the utilization ratio of water resource.
In the present application, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The shapes of the various elements in the drawings are illustrative and do not preclude the existence of certain differences from the actual shapes, and the drawings are used for the purpose of illustrating the principles of the present application and are not intended to limit the present application.
Although the present application has been disclosed in detail with reference to the accompanying drawings, it is to be understood that such description is merely illustrative and not restrictive of the application of the present application. The scope of the present application is defined by the appended claims and may include various modifications, adaptations, and equivalents of the subject application without departing from the scope and spirit of the present application.
Claims (8)
1. Water treatment facilities based on receive filtration membrane, water treatment facilities includes equalizing basin (1), hierarchical filtering ponds (2), desilting pond (3), membrane grid (4), biochemical combination pond (5), MBR pond (6), clean water basin (7) that communicate in proper order through the pipeline, its characterized in that, water treatment facilities still includes and receives filter membrane system (8), receive the water inlet of filter membrane system (8) connect in the delivery port of clean water basin (7), receive filter membrane system (8) and include: a nanofiltration membrane component (81), a control cabinet (83) and an equipment room (82);
the nanofiltration membrane component (81) is provided with a plurality of groups of nanofiltration membrane units (811), each nanofiltration membrane unit (811) comprises a nanofiltration membrane and a water pipe, the nanofiltration membrane component (81) is arranged at a water inlet of the nanofiltration membrane system (8), a water inlet of the nanofiltration membrane component (81) is connected to a water outlet of the clean water tank (7), and a water outlet of the nanofiltration membrane component (81) is connected to a water outlet of the water treatment equipment;
the equipment room (82) comprises a high-pressure pump (821) and a water inlet pump (822), the high-pressure pump (821) and the water inlet pump (822) are sequentially arranged between the water outlet of the clean water tank (7) and the water inlet of the nanofiltration membrane module (81), the high-pressure pump (821) is used for conducting pressurization operation on clean water in the clean water tank (7), and the water inlet pump (822) is used for pumping the pressurized clean water into the water inlet of the nanofiltration membrane module (81);
the control cabinet (83) is electrically connected to the control ends of the high-pressure pump (821) and the water inlet pump (822), and the control cabinet (83) is used for controlling the high-pressure pump (821) and the water inlet pump (822).
2. The nanofiltration membrane-based water treatment apparatus according to claim 1, wherein the nanofiltration membrane module (81) further comprises: a pressure gauge (812) and a flow meter (813);
the pressure gauge (812) is arranged on the water pipe, a signal output end of the pressure gauge (812) is electrically connected to a first signal input end of the control cabinet (83), and the pressure gauge (812) is used for detecting the pressure in the water pipe;
the flow meter (813) is arranged at a water inlet or a water outlet of the water pipe, a signal output end of the flow meter (813) is electrically connected to a second signal input end of the control cabinet (83), and the flow meter (813) is used for detecting the flow of the clean water in the water pipe.
3. The nanofiltration membrane-based water treatment apparatus according to claim 2, wherein the nanofiltration membrane module (81) further comprises: a PH sensor (814);
the PH sensor (814) is arranged on the water pipe, a signal output end of the PH sensor (814) is electrically connected to a third signal input end of the control cabinet (83), and the PH sensor (814) is used for detecting the PH value of the clean water in the water pipe.
4. The nanofiltration membrane-based water treatment apparatus according to claim 2, wherein the nanofiltration membrane module (81) further comprises: a conductivity tester (815);
the conductivity tester (815) is arranged on the water pipe, a signal output end of the conductivity tester (815) is electrically connected to a fourth signal input end of the control cabinet (83), and the conductivity tester (815) is used for detecting the conductivity of the clean water in the water pipe.
5. The nanofiltration membrane-based water treatment apparatus according to claim 1, wherein the control cabinet (83) further comprises: a touch screen;
the touch screen is arranged on the front face of the shell of the control cabinet (83), and is used for displaying detection signals received by the control cabinet (83).
6. The nanofiltration membrane-based water treatment apparatus of claim 1, further comprising: washing the pond with medicine;
the equipment room (82) further comprises: a drug washing pump (824);
the water inlet of the drug washing pump (824) is connected to the drug washing tank, the water outlet of the drug washing pump (824) is connected to the water inlet of the nanofiltration membrane component (81), and the drug washing pump (824) is used for cleaning the nanofiltration membrane unit (811).
7. The nanofiltration membrane-based water treatment apparatus of claim 6, further comprising: a cleaning tank;
the equipment room (82) further comprises: a backwash pump (823);
the water inlet of the backwashing pump (823) is connected to the cleaning pool, the water outlet of the backwashing pump (823) is connected to the water outlet of the nanofiltration membrane module (81), and the backwashing pump (823) is used for reversely cleaning the nanofiltration membrane unit (811).
8. The nanofiltration membrane-based water treatment apparatus according to claim 1, wherein the control cabinet (83) further comprises: a wireless transmission unit;
the wireless transmission unit is used for transmitting the detection signal received by the control cabinet (83).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822058740 | 2018-12-10 | ||
| CN2018220587407 | 2018-12-10 |
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| Publication Number | Publication Date |
|---|---|
| CN211004983U true CN211004983U (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921578255.0U Expired - Fee Related CN211004983U (en) | 2018-12-10 | 2019-09-26 | Water treatment equipment based on nanofiltration membrane |
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| CN (1) | CN211004983U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113480106A (en) * | 2021-07-31 | 2021-10-08 | 浙江新睿环保科技有限公司 | Emulsion and workshop cleaning sewage treatment process and treatment equipment thereof |
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2019
- 2019-09-26 CN CN201921578255.0U patent/CN211004983U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113480106A (en) * | 2021-07-31 | 2021-10-08 | 浙江新睿环保科技有限公司 | Emulsion and workshop cleaning sewage treatment process and treatment equipment thereof |
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Granted publication date: 20200714 |