CN115520996A - Treatment facility of waste water zero release - Google Patents

Treatment facility of waste water zero release Download PDF

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Publication number
CN115520996A
CN115520996A CN202211395589.0A CN202211395589A CN115520996A CN 115520996 A CN115520996 A CN 115520996A CN 202211395589 A CN202211395589 A CN 202211395589A CN 115520996 A CN115520996 A CN 115520996A
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CN
China
Prior art keywords
fixedly connected
purification
purification box
plate
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202211395589.0A
Other languages
Chinese (zh)
Inventor
叶浩挺
汪永强
王玉龙
何强辉
黎勇
王金玉
戴康
周思琪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai People Enterprise Pump Group Co ltd
Original Assignee
Shanghai People Enterprise Pump Group Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai People Enterprise Pump Group Co ltd filed Critical Shanghai People Enterprise Pump Group Co ltd
Priority to CN202211395589.0A priority Critical patent/CN115520996A/en
Publication of CN115520996A publication Critical patent/CN115520996A/en
Withdrawn legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/283Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/38Treatment of water, waste water, or sewage by centrifugal separation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00Apparatus for treatment of water, waste water or sewage
    • C02F2201/002Construction details of the apparatus

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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 a treatment device with zero discharge of wastewater, which relates to the technical field of wastewater treatment devices, and comprises a bottom plate and is characterized in that: the purifying box is arranged on the bottom plate, the top of the purifying box is fixedly connected with the feeding cylinder, and the filtering plate is arranged in the feeding cylinder; set up the purification mechanism in the purifying box, including the fixed reaction tank that sets up in the purifying box, the reaction tank is the arc structure, the reaction tank is provided with a plurality ofly, and a plurality of reaction tank longitudinal arrangement set up in the purifying box, and the purifying box lateral wall fixed connection of pick-up plate below holds the pressure pump, holds pressure pump one side fixed connection installation section of thick bamboo, the purifying box is kept away from collecting box one side and is set up the inlet pipe, purifying box bottom fixed connection active carbon adsorption plate, the drive column drives the filter screen that rotates shell one side and rotates, filters the waste material who produces after the waste water reaction and throws away, detects waste water purification process through the pick-up plate, under the thorough prerequisite of assurance waste water purification, improves waste water purification efficiency and purification degree.

Description

Treatment facility of waste water zero release
Technical Field
The invention relates to the technical field of wastewater treatment equipment, in particular to treatment equipment for zero discharge of wastewater.
Background
Sewage treatment for making sewage reach the water quality requirement of discharging into a certain water or reuse and purify its process, sewage treatment is widely used in each field such as building, agriculture, traffic, energy, petrochemical industry, environmental protection, urban landscape, medical treatment, food and beverage, also walks into common people's daily life more and more, and sewage has caused very big injury to human life, when people need handle sewage through sewage treatment plant, usually need add the medicament into people's aquatic then stir the purification.
However, in the actual stirring process, the traditional purification treatment discharge equipment cannot well judge the degree of reaction between the wastewater and the purification agent, and under the condition, a constructor needs to stir and purify the wastewater for a long time if the wastewater is required to be completely purified, so that the wastewater is completely purified and still stirred, the wastewater treatment efficiency is reduced, or the wastewater is beaten away under the condition of insufficient stirring, and the purification is not complete.
Disclosure of Invention
The invention provides a treatment device for zero discharge of wastewater, which solves the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a treatment facility of zero release of waste water, includes the bottom plate, still includes:
the purifying box is arranged on the bottom plate, the top of the purifying box is fixedly connected with the feeding cylinder, and the filtering plate is arranged in the feeding cylinder; the purification mechanism is arranged in the purification box and comprises a reaction tank fixedly arranged in the purification box, the reaction tank is of an arc-shaped structure, a plurality of reaction tanks are arranged in the purification box, a driving column is arranged on the reaction tank, a rotating shell is fixedly connected on the driving column, a filter screen is fixedly connected on one side of the rotating shell, a stirring component is arranged on one side of the rotating shell, a discharging pipe is fixedly connected on the bottom of the reaction tank and slides on the discharging pipe to penetrate through the valve rod, a valve opening is formed in the valve rod, the inner wall of the purification box on one side of the reaction tank is rotatably connected with a detection plate, a pressure storage pump is fixedly connected on one side of the purification box and is arranged below the detection plate, a piston component is arranged between the installation cylinder and the detection plate, a movable component is arranged between the installation cylinder and the valve rod, a collection box is fixedly connected on one side of the purification box, a feeding pipe is arranged on one side of the purification box, an active carbon detection plate is fixedly connected on the bottom of the purification box, the drive column drives the rotating shell to rotate, the filter screen generated after the wastewater reaction, the waste is thrown out, the waste purification process of wastewater is detected, the waste purification process is guaranteed, the waste discharge, and the purification efficiency of wastewater is improved, and the wastewater purification efficiency and the wastewater is improved thoroughly.
As a preferred technical scheme of the invention, the stirring assembly comprises a fixed rod fixedly arranged on one side of the rotating shell, one side of the fixed rod is rotatably connected with a rotating column, the rotating column is fixedly connected with a stirring rod, and the side wall of the fixed rod on one side of the rotating column is fixedly connected with a stirring motor.
As a preferable technical scheme of the invention, the piston assembly comprises a piston rod which is arranged on the mounting cylinder in a sliding penetrating mode, a transmission rod is hinged between the piston rod and the detection plate, two ends of the piston rod are respectively provided with a flow guide groove and a through hole, and an elastic piece is fixedly arranged between one end of the piston rod and the mounting cylinder.
As a preferred technical scheme of the invention, the movable assembly comprises a piston block which is slidably arranged in the mounting cylinder, one side of the piston block is fixedly connected with a piston column, one end of the piston column is sleeved with a telescopic piece, and the end part of the piston column is fixedly connected with a valve rod.
According to a preferable technical scheme of the invention, the side wall of the purification box below the detection plate is fixedly connected with the guide plate, the side wall of the purification box on one side of the guide plate is provided with a discharge hole, the side wall of the bottom of the purification box is provided with a water filtering hole, the water filtering hole extends into the purification box, and wastewater is recovered and treated through the water filtering hole.
As a preferred technical scheme of the invention, the outer wall of the purification box at one axial side of the driving column is rotatably connected with linkage wheels, a conveyor belt is arranged between the linkage wheels and is in transmission connection with the linkage wheels through the conveyor belt, one side of the purification box is fixedly connected with a driving motor, and one end of an output shaft of the driving motor is fixedly connected with the end part of the driving column.
As a preferable technical scheme of the present invention, a water pumping pipe is fixedly penetrated through a side wall of the purification box below the activated carbon adsorption plate, and a drainage pump is fixedly connected to an outer wall of the purification box on one side of the water pumping pipe.
The invention has the following advantages: when the waste water purifying device is used, waste water to be purified is sent into a reaction tank of a purifying box through a feeding cylinder, solid impurities in the waste water are filtered under the action of a filter plate, then a driving motor is started to drive a driving column to rotate, meanwhile, a purifying agent is added through a feeding pipe, the driving column drives a rotating column on one side of a rotating shell to rotate, stirring of the waste water is realized under the action of a stirring rod, condensed impurities generated by full reaction of the agent and the waste water are filtered by the filter screen, when the filter screen rotates out of one side of the reaction tank, the impurities are thrown out under the action of centrifugal force, a detection plate is driven to rotate under the gravity of the impurities, the impurities fall into a collection box through a guide plate, meanwhile, a piston rod is driven to move downwards under the action of a transmission rod, the guide groove is communicated with an installation cylinder, gas in the installation cylinder is released, the impurities in the waste water are gradually reacted along with the reaction, after the impurities are completely reacted, the filter screen is not thrown out of the impurities, the impurities are gradually moved under the action of a pressure storage pump, the air pressure in the installation cylinder is gradually increased, the premise that the piston block drives a piston column to move towards one side, the waste water purification process, the waste water purification treatment is finally, and the waste water purification process is thoroughly purified, the waste water purification efficiency is improved, and the waste water purification process is thoroughly purified under the waste water purification process is improved.
Drawings
FIG. 1 is a schematic structural diagram of the whole interior of a treatment facility for zero discharge of wastewater.
Fig. 2 is a schematic structural diagram of the front side of a treatment device for zero wastewater discharge.
Fig. 3 is an enlarged schematic view of a in fig. 2.
FIG. 4 is a schematic structural diagram of a treatment facility for zero waste water discharge viewed from the bottom.
Fig. 5 is a schematic structural diagram of a side view of a treatment facility for zero waste water discharge.
In the figure: 1. a base plate; 2. an activated carbon adsorption plate; 3. a purification box; 4. a reaction tank; 5. a fixing rod; 6. a stirring rod; 7. rotating the shell; 8. rotating the column; 9. a feed pipe; 10. a filter screen; 11. a drive column; 12. detecting a plate; 13. a feeding cylinder; 14. a discharging pipe; 15. a piston assembly; 16. a transmission rod; 17. a piston rod; 18. a baffle; 19. water filtering holes; 20. a collection box; 21. draining pump; 22. a piston post; 23. a valve rod; 24. a valve port; 25. a water pumping pipe; 26. mounting the cylinder; 27. a pressure accumulating pump; 28. a diversion trench; 29. a port; 30. an elastic member; 31. a piston block; 32. a telescoping member; 33. a drive motor; 34. a linkage wheel; 35. a discharge port; 36. a filter plate; 37. a purification mechanism; 38. a movable component; 39. and a stirring component.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example 1
Referring to fig. 1-5, a wastewater zero-discharge treatment apparatus includes a base plate 1, and further includes: the purification box 3 is fixedly arranged on the bottom plate 1, the top of the purification box 3 is fixedly connected with the feeding cylinder 13, and the filter plate 36 is fixedly arranged in the feeding cylinder 13; purification mechanism 37 who sets up in purifying box 3, including fixed setting up reaction tank 4 in purifying box 3, reaction tank 4 is the arc structure, reaction tank 4 is provided with a plurality ofly, and a plurality of reaction tank 4 longitudinal arrangement set up in purifying box 3, set up drive post 11 on reaction tank 4, drive post 11 rotates with purifying box 3 and is connected, fixed connection rotates shell 7 on the drive post 11, rotates shell 7 one side fixed connection filter screen 10, it sets up stirring component 39 to rotate shell 7 one side, reaction tank 4 bottom fixed connection unloading pipe 14, the sliding runs through and sets up valve rod 23 on the unloading pipe 14, sets up valve mouth 24 on the valve rod 23, the purifying box 3 inner wall of reaction tank 4 one side rotates and connects pick-up plate 12, purifying box 3 lateral wall fixed connection accumulator pump 27 of detecting plate 12 below, accumulator pump 27 one side fixed connection installation cylinder 26, set up piston assembly 15 between installation cylinder 26 and 12, set up movable connection assembly 38 between installation cylinder 26 and the valve rod 23, purifying box 3 one side fixed connection pressure storage pump 27, purifying box 3 keeps away from fixed connection installation cylinder 9, purification box 3 and purification box 12, the waste water purification efficiency of waste water discharge through the purification reaction tank 11, the waste water purification efficiency detection box, waste water discharge detection box 10, waste water purification process.
Example 2
Referring to fig. 1-5, the other contents of the present embodiment are the same as embodiment 1, except that: stirring subassembly 39 is including fixed setting in the dead lever 5 that rotates shell 7 one side, and dead lever 5 one side is rotated and is connected rotation post 8, rotates fixed connection puddler 6 on the post 8, the 5 lateral wall fixed connection agitator motor of dead lever of 8 one sides of rotation post, agitator motor's output shaft and the 8 fixed connection of rotation post can improve the reaction efficiency of waste water and medicament under the effect of puddler 6.
The piston assembly 15 comprises a piston rod 17 slidably penetrating through an installation cylinder 26, a transmission rod 16 is hinged between the piston rod 17 and the detection plate 12, two ends of the piston rod 17 are respectively provided with a diversion trench 28 and a through hole 29, an elastic member 30 is fixedly arranged between one end of the piston rod 17 and the installation cylinder 26, and the elastic member 30 can be a spring with telescopic property or an elastic metal sheet and the like.
The movable assembly 38 includes a piston block 31 slidably disposed in the mounting tube 26, one side of the piston block 31 is fixedly connected to the piston post 22, one end of the piston post 22 is sleeved with a telescopic member 32, one end of the piston post 22 passes through the mounting tube 26, and the end of the piston post 22 is fixedly connected to the valve rod 23, wherein the telescopic member 32 may be a spring with a telescopic property or an elastic metal sheet.
The side wall of the purification box 3 below the detection plate 12 is fixedly connected with a guide plate 18, the side wall of the purification box 3 on one side of the guide plate 18 is provided with a discharge hole 35, the side wall of the bottom of the purification box 3 is provided with a water filtering hole, and the water filtering hole extends into the purification box 3.
The outer wall of the purification box 3 on one axial side of the driving column 11 is rotatably connected with linkage wheels 34, a conveyor belt is arranged between the linkage wheels 34 and is in transmission connection with the conveyor belt, one side of the purification box 3 is fixedly connected with a driving motor 33, and one end of an output shaft of the driving motor 33 is fixedly connected with the end part of the driving column 11.
3 lateral walls of purifying box of 2 below of active carbon adsorption board are fixed to run through and are set up drinking- water pipe 25, and 3 outer wall fixed connection drain pumps 21 of purifying box of drinking-water pipe 25 one side can take the water that purifies the completion out through drain pump 21.
Waste water that will purify passes through feed cylinder 13 and sends into the reaction tank 4 of purifying box 3, the filtration of solid impurity in the waste water is realized to the effect of filter 36 down, then start driving motor 33 and drive post 11 and rotate, simultaneously add through inlet pipe 9 and purify the medicament, drive post 11 drives the rotation post 8 that rotates shell 7 one side and rotates, realize the stirring to waste water under the effect of puddler 6, make the impurity that condenses that medicament and waste water fully react and produce filtered by filter screen 10, when filter screen 10 rotates out reaction tank 4 one side, impurity is thrown away under the effect of centrifugal force, drive pick-up plate 12 and rotate under the gravity of impurity, impurity falls and falls into collecting box 20 through guide plate 18.
The piston rod 17 is driven to move downwards under the action of the transmission rod 16, so that the diversion trench 28 is communicated with the installation cylinder 26, gas in the installation cylinder 26 is released, impurities in the wastewater are gradually reacted along with the reaction, after the impurities are completely reacted, the filter screen 10 does not throw the impurities out, then under the action of the pressure accumulation pump 27, the air pressure in the installation cylinder 26 is gradually increased, the piston block 31 drives the piston column 22 to move towards one side, so that the valve port 24 on the valve rod 23 is communicated with the discharging pipe 14, the wastewater is released into the next reaction tank 4, another type of waste purification treatment is carried out, and finally, the wastewater is thoroughly purified through the activated carbon adsorption plate 2.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a treatment facility of waste water zero release, includes the bottom plate, its characterized in that still includes:
the purifying box is arranged on the bottom plate, the top of the purifying box is fixedly connected with the feeding cylinder, and the filtering plate is arranged in the feeding cylinder;
the purification mechanism is arranged in the purification box and comprises reaction tanks fixedly arranged in the purification box, wherein the reaction tanks are of arc structures, a plurality of reaction tanks are arranged in the purification box, a driving column is arranged on each reaction tank, a rotating shell is fixedly connected on each driving column, a filter screen is fixedly connected on one side of the rotating shell, a stirring component is arranged on one side of the rotating shell, a discharging pipe is fixedly connected to the bottom of each reaction tank and slides on the discharging pipe to penetrate through a valve rod, a valve opening is formed in the valve rod, a detection plate is rotatably connected to the inner wall of the purification box on one side of each reaction tank, a pressure storage pump is fixedly connected to the side wall of the purification box below the detection plate, a mounting cylinder is fixedly connected to one side of the pressure storage pump, a piston component is arranged between the mounting cylinder and the detection plate, a movable component is arranged between the mounting cylinder and the valve rod, a collection box is fixedly connected to one side of the purification box, an active carbon plate is fixedly connected to the bottom of the purification box, the drive column drives the filter screen on one side of the rotating shell to rotate, waste generated after reaction, is filtered, waste is purified, waste is discharged, and the purification process is detected, and the purification efficiency and the waste water purification efficiency is improved.
2. The wastewater zero-discharge treatment equipment as claimed in claim 1, wherein the stirring assembly comprises a fixed rod fixedly arranged on one side of the rotating shell, one side of the fixed rod is rotatably connected with a rotating column, a stirring rod is fixedly connected on the rotating column, and a side wall of the fixed rod on one side of the rotating column is fixedly connected with a stirring motor.
3. The wastewater zero-discharge treatment equipment as claimed in claim 1, wherein the piston assembly comprises a piston rod slidably penetrating through the mounting cylinder, a transmission rod is hinged between the piston rod and the detection plate, a diversion trench and a through hole are respectively formed at two ends of the piston rod, and an elastic member is fixedly arranged between one end of the piston rod and the mounting cylinder.
4. The wastewater zero-emission treatment equipment as claimed in claim 3, wherein the movable assembly comprises a piston block slidably disposed in the mounting cylinder, one side of the piston block is fixedly connected with a piston column, one end of the piston column is sleeved with a telescopic member, and the end of the piston column is fixedly connected with the valve rod.
5. The treatment equipment for zero discharge of wastewater as claimed in claim 4, wherein the side wall of the purification box below the detection plate is fixedly connected with the guide plate, the side wall of the purification box on one side of the guide plate is provided with the discharge port, the side wall of the bottom of the purification box is provided with the water filtering port, and the water filtering port extends into the purification box.
6. The wastewater zero-discharge treatment equipment as claimed in claim 1, wherein the outer wall of the purification box at one side of the axial direction of the driving column is rotatably connected with linkage wheels, a conveyor belt is arranged between the linkage wheels and is in transmission connection with the linkage wheels through the conveyor belt, one side of the purification box is fixedly connected with a driving motor, and one end of an output shaft of the driving motor is fixedly connected with the end part of the driving column.
7. The treatment equipment for zero discharge of wastewater according to claim 1, wherein a water pumping pipe is fixedly arranged on the side wall of the purification box below the activated carbon adsorption plate in a penetrating manner, and a drainage pump is fixedly connected to the outer wall of the purification box on one side of the water pumping pipe.
CN202211395589.0A 2022-11-09 2022-11-09 Treatment facility of waste water zero release Withdrawn CN115520996A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211395589.0A CN115520996A (en) 2022-11-09 2022-11-09 Treatment facility of waste water zero release

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211395589.0A CN115520996A (en) 2022-11-09 2022-11-09 Treatment facility of waste water zero release

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Publication Number Publication Date
CN115520996A true CN115520996A (en) 2022-12-27

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CN202211395589.0A Withdrawn CN115520996A (en) 2022-11-09 2022-11-09 Treatment facility of waste water zero release

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116062865A (en) * 2023-03-06 2023-05-05 滨州市建设工程质量安全服务中心 Municipal construction sewage treatment ware

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109704488A (en) * 2019-03-02 2019-05-03 韦伟 A kind of petroleum assistant production wastewater treatment reclaiming system
CN210237356U (en) * 2019-07-23 2020-04-03 陕西省现代建筑设计研究院 Environment-friendly pharmaceutical wastewater treatment device
CN213738924U (en) * 2020-10-12 2021-07-20 江苏星州生态环境技术有限公司 Electroplating effluent filters and sampling device
CN216445163U (en) * 2021-12-15 2022-05-06 北京世源希达工程技术有限公司 Industrial wastewater recycling equipment
CN216614306U (en) * 2022-01-21 2022-05-27 山西润潞碧水环保科技股份有限公司 Visual type clarification plant of industrial wastewater treatment
CN115057566A (en) * 2022-08-18 2022-09-16 山东省阳信金缘纺化有限公司 Chemical wastewater purification treatment instrument
CN115253961A (en) * 2022-07-06 2022-11-01 袁鹏 Underground water is agitating unit for analysis chemical examination

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109704488A (en) * 2019-03-02 2019-05-03 韦伟 A kind of petroleum assistant production wastewater treatment reclaiming system
CN210237356U (en) * 2019-07-23 2020-04-03 陕西省现代建筑设计研究院 Environment-friendly pharmaceutical wastewater treatment device
CN213738924U (en) * 2020-10-12 2021-07-20 江苏星州生态环境技术有限公司 Electroplating effluent filters and sampling device
CN216445163U (en) * 2021-12-15 2022-05-06 北京世源希达工程技术有限公司 Industrial wastewater recycling equipment
CN216614306U (en) * 2022-01-21 2022-05-27 山西润潞碧水环保科技股份有限公司 Visual type clarification plant of industrial wastewater treatment
CN115253961A (en) * 2022-07-06 2022-11-01 袁鹏 Underground water is agitating unit for analysis chemical examination
CN115057566A (en) * 2022-08-18 2022-09-16 山东省阳信金缘纺化有限公司 Chemical wastewater purification treatment instrument

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116062865A (en) * 2023-03-06 2023-05-05 滨州市建设工程质量安全服务中心 Municipal construction sewage treatment ware

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Application publication date: 20221227

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