CN215756977U - Sludge drying device for sludge innocent treatment - Google Patents

Sludge drying device for sludge innocent treatment Download PDF

Info

Publication number
CN215756977U
CN215756977U CN202122132444.9U CN202122132444U CN215756977U CN 215756977 U CN215756977 U CN 215756977U CN 202122132444 U CN202122132444 U CN 202122132444U CN 215756977 U CN215756977 U CN 215756977U
Authority
CN
China
Prior art keywords
sludge
stirring
mud
casing
mummification
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.)
Active
Application number
CN202122132444.9U
Other languages
Chinese (zh)
Inventor
李艳
彭小丽
王三军
林幼幼
李红阳
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.)
Wuhan Xihao Environmental Protection Co ltd
Original Assignee
Wuhan Xihao Environmental Protection 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 Wuhan Xihao Environmental Protection Co ltd filed Critical Wuhan Xihao Environmental Protection Co ltd
Priority to CN202122132444.9U priority Critical patent/CN215756977U/en
Application granted granted Critical
Publication of CN215756977U publication Critical patent/CN215756977U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Drying Of Solid Materials (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The utility model relates to a sludge drying device for innocent treatment of mud relates to sludge treatment's field to solve the problem that the mummification efficiency that leads to mud in the impurity sneaks into mud is lower, and it includes sludge filtering mechanism, sludge stirring mechanism and sludge drying mechanism, sludge filtering mechanism, sludge stirring mechanism and sludge drying mechanism arrange from the top down in proper order, and sludge stirring mechanism is used for stirring the mud after sludge filtering mechanism filters, and sludge drying mechanism is used for carrying out the mummification to the mud after the stirring of sludge stirring mechanism and handles. This application utensil makes mud pass sludge filtration mechanism, sludge stirring mechanism and sludge drying mechanism in proper order, can filter the impurity in the mud through sludge filtration mechanism, and rethread sludge stirring mechanism stirs the mud after filtering, makes the moisture in the mud ooze, carries out the mummification through sludge drying mechanism to mud at last, does not contain impurity in the mud to can improve the effect of the mummification efficiency of mud.

Description

Sludge drying device for sludge innocent treatment
Technical Field
The application relates to the field of sludge treatment, in particular to a sludge drying device for harmless treatment of sludge.
Background
A large amount of sludge is generated in the process of municipal sewage treatment and can be used as a resource for utilization after proper treatment, sludge drying is an important intermediate process for recycling sludge, and the process of removing most of water content from the sludge through the functions of percolation or evaporation and the like generally refers to the adoption of self-evaporation facilities such as a sludge drying bed (bed) and the like.
The application number is 201821545757.9's chinese utility model discloses a sludge drying device, including mud stirring mechanism, mud stirring mechanism is including stirring garrulous owner shell, first feeding casing, second feeding casing, first baffle and second baffle. According to the utility model, the sludge is discharged into the first feeding shell and the second feeding shell respectively, and the sludge in the first feeding shell and the second feeding shell is supported by the first partition plate and the second partition plate respectively, so that workers can check whether the sludge contains impurities such as plastic bags and the like, and can take out the impurities such as the plastic bags and the like from the sludge in time.
In view of the above-mentioned related art, the inventors found that the following drawbacks exist: when the sludge falls onto the first partition plate and the second partition plate, workers are required to check and take out impurities, however, the workers cannot completely remove the impurities through checking, residual impurities are mixed into the sludge and are dried together, sludge drying is affected, and the drying efficiency of the sludge is low.
SUMMERY OF THE UTILITY MODEL
In order to improve the mummification efficiency of mud, this application provides a mud mummification device for sludge innocent treatment.
The application provides a sludge drying device for sludge innocent treatment adopts following technical scheme:
the utility model provides a sludge drying device for sludge innocent treatment, includes sludge filtration mechanism, sludge stirring mechanism and sludge drying mechanism, sludge filtration mechanism, sludge stirring mechanism and sludge drying mechanism arrange from the top down in proper order, sludge stirring mechanism is used for stirring the mud after sludge filtration mechanism filters, sludge drying mechanism is used for carrying out the mummification to the mud after the stirring of sludge stirring mechanism and handles.
Through adopting above-mentioned technical scheme, mud passes sludge filtration mechanism, sludge stirring mechanism and sludge drying mechanism in proper order at the mummification in-process, can filter the impurity in the mud through sludge filtration mechanism, and rethread sludge stirring mechanism stirs the mud after filtering, makes the moisture in the mud ooze, carries out the mummification through sludge drying mechanism to mud at last, does not contain impurity in the mud to can improve the mummification efficiency of mud.
Optionally, the sludge filtering mechanism comprises a feeding shell, a filtering sieve and a driving piece, a feeding port for feeding and a discharging port for discharging are formed in the feeding shell, the filtering sieve is horizontally arranged at the feeding port, and the driving piece is arranged on the feeding shell and used for enabling the filtering sieve to shake.
Through adopting above-mentioned technical scheme, mud is poured into on the filter sieve from the feed inlet department of feeding casing, makes the filter sieve take place the shake through the driving piece, makes mud pass the filter sieve fast and falls, discharges from the discharge gate department to can improve the mud filtration efficiency on the filter sieve.
Optionally, the driving part includes four first motors and driving discs, one side of each of the four driving discs is rotatably connected to four corners of the filter screen, the other side of each of the four driving discs is rotatably connected to the inner wall of the feed port, when one end of the filter screen moves to the highest point of the driving disc, the other end of the filter screen moves to the lowest point of the driving disc, the number of the first motors is two, the two first motors are fixedly mounted on the feed housing, and the two first motors are used for driving the driving discs at two ends of the filter screen to rotate in opposite directions.
By adopting the technical scheme, the two first motors enable the driving discs at the two ends of the filter sieve to rotate, and when one end of the filter sieve moves to the highest point of the driving discs, the other end of the filter sieve moves to the lowest point of the driving discs, so that the sludge inside the filter sieve can be laid more uniformly, and the filtering effect of the sludge is improved.
Optionally, the sludge stirring mechanism includes a stirring housing, a blocking piece and a stirring piece, the stirring housing is disposed at the lower end of the feeding housing and communicated with the discharge port, the stirring piece includes a second motor and a stirring rod disposed on an output shaft of the second motor, the second motor is fixedly mounted on the stirring housing, the stirring rod extends into the stirring housing and is used for stirring sludge, a discharge port is disposed at the lower end of the stirring housing, and the blocking piece is disposed on the stirring housing and is used for opening or closing the discharge port.
Through adopting above-mentioned technical scheme, mud after the filtration gets into the inside of agitator housing from the discharge gate department, starts the second motor and drives the puddler rotation, stirs the inside mud of agitator housing to can make the moisture in the mud ooze, the mummification of mud with higher speed improves the mummification efficiency of mud.
Optionally, the grid baffle includes baffle and cylinder, baffle fixed connection is in the output of cylinder, cylinder fixed mounting is on stirring the casing, the cylinder drives the baffle motion so that the bin outlet is opened or is closed.
Through adopting above-mentioned technical scheme, the cylinder can control the motion of baffle to be convenient for close and open the bin outlet, can make the inside mud that stirs of stirring shell automatically fall, need not manual operation, reduce workman intensity of labour.
Optionally, sludge drying mechanism includes mummification casing and spiral pushing equipment, the mummification casing is slope upwards to set up, the bin outlet communicates with the bottom of mummification casing, spiral pushing equipment is used for the inside mud of mummification casing upwards propelling movement, the top of mummification casing is provided with the mud discharging mouth, the bottom of mummification casing is provided with the outlet.
Through adopting above-mentioned technical scheme, the inside of stirring mud falling to the mummification casing, the spiral pushes away the material subassembly and can promote mud rebound, and the moisture in the mud downward flow flows from drain outlet department and flows out, reduces the moisture in the mud to can improve the efficiency of sludge mummification.
Optionally, spiral pushing assembly includes third motor and screw member, third motor fixed connection is on the mummification casing, screw member sets up inside mummification casing side, third motor drive screw member rotates so that mud rebound.
Through adopting above-mentioned technical scheme, third motor drive screw member rotates to can make the inside mud of mummification casing rise, need not manual operation, reduce workman intensity of labour.
Optionally, a hot air generator is arranged on the drying shell, and an air outlet of the hot air generator is communicated with the inside of the drying shell.
Through adopting above-mentioned technical scheme, hot-blast generator pours into hot-blastly into to the inside of mummification casing to can heat the inside mud of mummification casing for the moisture evaporation in the mud improves the efficiency of sludge anhydration.
In summary, the present application includes at least the following advantageous technical effects:
1. the sludge sequentially passes through the sludge filtering mechanism, the sludge stirring mechanism and the sludge drying mechanism in the drying process, impurities in the sludge can be filtered through the sludge filtering mechanism, the filtered sludge is stirred through the sludge stirring mechanism, so that water in the sludge is leaked out, and finally the sludge is dried through the sludge drying mechanism, and the sludge does not contain impurities, so that the drying efficiency of the sludge can be improved;
2. the two first motors enable the driving discs at two ends of the filter screen to rotate, when one end of the filter screen moves to the highest point of the driving discs, the other end of the filter screen moves to the lowest point of the driving discs, so that the filter screen shakes, sludge rapidly penetrates through the filter screen to fall down and is discharged from the discharge port, the sludge filtering efficiency on the filter screen can be improved, meanwhile, sludge inside the filter screen is laid more uniformly, and the sludge filtering effect is improved;
3. can promote mud rebound through spiral pushing equipment, the moisture downflow in the mud flows from drain outlet department, reduces the moisture in the mud, and hot-blast generator injects hot-blastly to the inside of mummification casing simultaneously to can heat the inside mud of mummification casing, accelerate the moisture evaporation in the mud, thereby can improve the efficiency of sludge anhydration.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;
FIG. 2 is a schematic diagram of a front view structure of an embodiment of the present application;
FIG. 3 is a schematic cross-sectional view of an embodiment of the present application.
Reference numerals: 1. a sludge filtering mechanism; 11. a feed housing; 111. a feed inlet; 112. a discharge port; 12. filtering and screening; 13. a drive member; 131. a first motor; 132. a drive disc; 2. a sludge stirring mechanism; 21. stirring the shell; 211. a discharge outlet; 22. a shelf; 221. a baffle plate; 222. a cylinder; 23. a stirring member; 231. a second motor; 232. a stirring rod; 3. a sludge drying mechanism; 31. drying the shell; 311. a sludge discharge port; 312. a water outlet; 32. a spiral pushing assembly; 321. a third motor; 322. a screw member; 33. a hot air generator.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses a sludge drying device for sludge innocent treatment.
Referring to fig. 1, the sludge drying device for sludge innocent treatment comprises a sludge filtering mechanism 1, a sludge stirring mechanism 2 and a sludge drying mechanism 3, wherein the sludge filtering mechanism 1, the sludge stirring mechanism 2 and the sludge drying mechanism 3 are sequentially arranged from top to bottom, sludge to be treated is filtered through the sludge filtering mechanism 1, impurities in the sludge are removed, the filtered sludge is stirred through the sludge stirring mechanism 2, moisture in the sludge is seeped out, and finally the stirred sludge enters the sludge drying mechanism 3, so that the moisture in the sludge flows out and is dried.
Referring to fig. 1, in order to improve the filtering efficiency and effect of sludge, the sludge filtering mechanism 1 includes a feeding housing 11, a filtering sieve 12 and a driving part 13, a feeding port 111 for feeding and a discharging port 112 for discharging are formed on the feeding housing 11, the filtering sieve 12 is horizontally disposed at the feeding port 111, the driving part 13 is disposed on the feeding housing 11 for shaking the filtering sieve 12, the driving part 13 includes a first motor 131 and four driving disks 132, the driving disks 132 are four, one side of each driving disk 132 is rotatably connected to four corners of the filtering sieve 12, the other side of each driving disk 132 is rotatably connected to an inner wall of the feeding port 111, when one end of the filtering sieve 12 moves to the highest point of the driving disk 132, the other end of the filtering sieve 12 moves to the lowest point of the driving disk 132, two first motors 131 are disposed, and both first motors 131 are fixedly mounted on the feeding housing 11, the two first motors 131 are used for driving the driving discs 132 at the two ends of the filter sieve 12 to rotate in opposite directions, the two first motors 131 enable the driving discs 132 at the two ends of the filter sieve 12 to rotate, when one end of the filter sieve 12 moves to the highest point of the driving discs 132, the other end of the filter sieve 12 moves to the lowest point of the driving discs 132, so that sludge inside the filter sieve 12 can be laid more uniformly, the filtering effect of the sludge is better, meanwhile, the filter sieve 12 shakes, the sludge rapidly penetrates through the filter sieve 12 and falls down, and the sludge filtering efficiency on the filter sieve 12 is improved.
Referring to fig. 1 and 3, in order to facilitate the stirring of the filtered sludge, the sludge stirring mechanism 2 includes a stirring housing 21, a barrier 22 and a stirring member 23, the stirring housing 21 is fixedly connected to the lower end of the feeding housing 11 and is communicated with the discharge port 112, the stirring member 23 includes a second motor 231 and a stirring rod 232 fixedly connected to an output shaft of the second motor 231, the second motor 231 is fixedly installed on the stirring housing 21, the stirring rod 232 extends into the stirring housing 21 for stirring the sludge, the lower end of the stirring housing 21 is provided with a discharge port 211, the barrier 22 is fixedly installed on the stirring housing 21 for opening or closing the discharge port 211, the barrier 22 includes a baffle 221 and a cylinder 222, the baffle 221 is fixedly connected to an output end of the cylinder 222, the cylinder 222 is fixedly installed on the stirring housing 21, the cylinder 222 drives the baffle 221 to move to open or close the discharge port 211, when the cylinder 222 enables the baffle 221 to close the discharge opening 211, sludge stays in the stirring shell 21, the second motor 231 drives the stirring rod 232 to rotate to stir the sludge, so that moisture in the sludge can seep out, and after the cylinder 222 drives the baffle 221 to move to enable the discharge opening 211 to be opened, the stirred sludge can fall from the discharge opening 211.
Referring to fig. 2 and 3, in order to dry the stirred sludge, the sludge drying mechanism 3 includes a drying shell 31 and a spiral pushing assembly 32, the drying shell 31 is disposed obliquely upward, a discharge port 211 is communicated with the bottom of the drying shell 31, the spiral pushing assembly 32 is used for pushing the sludge in the drying shell 31 upward, a sludge discharge port 311 is disposed at the top of the drying shell 31, a water discharge port 312 is disposed at the bottom of the drying shell 31, when the stirred sludge enters the drying shell 31, water in the sludge rushes out from the water discharge port 312 below the drying shell 31, the spiral pushing assembly 32 includes a third motor 321 and a spiral rod member 322, the third motor 321 is fixedly connected to the drying shell 31, the spiral rod member 322 is rotatably connected to the inside of the drying shell 31, the third motor 321 drives the spiral rod member 322 to rotate so as to move the sludge upward, and the sludge falls out from the sludge discharge port 311, reduce the moisture in the mud, carry out the mummification to mud, fixed mounting has hot-blast generator 33 on the mummification casing 31 simultaneously, and the air outlet of hot-blast generator 33 and the inside intercommunication of mummification casing 31, hot-blast generator 33 are hot-blast to the inside injection of mummification casing 31 to can heat the inside mud of mummification casing 31, accelerate the moisture evaporation in the mud, improve the efficiency of sludge mummification.
The implementation principle of the sludge drying device for harmless treatment of sludge in the embodiment of the application is as follows: when the device is used, a power supply is firstly switched on, sludge is poured from the feeding hole 111, the sludge falls onto the filter sieve 12, the two first motors 131 are started to enable the driving discs 132 at the two ends of the filter sieve 12 to rotate, when one end of the filter sieve 12 moves to the highest point of the driving discs 132, the other end of the filter sieve 12 moves to the lowest point of the driving discs 132, and the filter sieve 12 is shaken, so that the sludge in the filter sieve 12 can be laid more uniformly, and the sludge can quickly pass through the filter sieve 12 and fall;
the filtered sludge enters the inside of the stirring shell 21 from the discharge port 112 on the feeding shell 11, at this time, the baffle 221 closes the discharge port 211 of the stirring shell 21, the second motor 231 is started to drive the stirring rod 232 to rotate, the sludge in the stirring shell 21 is stirred, and therefore moisture in the sludge can seep out;
after the sludge is stirred, the starting cylinder 222 pulls the baffle 221 to move, so that the discharge port 211 is opened, the sludge enters the drying shell 31, the spiral rod 322 is driven to rotate through the third motor 321, the sludge can be driven to move upwards and fall from the sludge discharge port 311, moisture in the sludge flows out from the water discharge port 312 at the bottom of the drying shell 31, and meanwhile, the hot air generator 33 injects hot air into the drying shell 31, so that the evaporation of the moisture in the sludge is accelerated, and the efficiency of sludge drying is improved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a mud mummification device for sludge innocent treatment which characterized in that: including sludge filtration mechanism (1), sludge stirring mechanism (2) and sludge drying mechanism (3), sludge filtration mechanism (1), sludge stirring mechanism (2) and sludge drying mechanism (3) are arranged from the top down in proper order, sludge stirring mechanism (2) are used for stirring the mud after sludge filtration mechanism (1) filters, sludge drying mechanism (3) are used for carrying out the mummification to the mud after sludge stirring mechanism (2) stirs and handle.
2. The sludge drying device for sludge innocent treatment according to claim 1, characterized in that: sludge filtering mechanism (1) is including feeding casing (11), filter sieve (12) and driving piece (13), offer feed inlet (111) that are used for the feeding on feeding casing (11) and discharge gate (112) that are used for the ejection of compact, filter sieve (12) level sets up in feed inlet (111) department, driving piece (13) set up and are used for making filter sieve (12) realize the shake on feeding casing (11).
3. The sludge drying device for sludge innocent treatment according to claim 2, characterized in that: the driving piece (13) comprises four first motors (131) and driving discs (132), one sides of the four driving discs (132) are respectively connected to four corners of the filter screen (12) in a rotating mode, the other sides of the driving discs (132) are connected with the inner wall of the feeding hole (111) in a rotating mode, when one end of the filter screen (12) moves to the highest point of the driving discs (132), the other end of the filter screen (12) moves to the lowest point of the driving discs (132), two first motors (131) are arranged, the two first motors (131) are fixedly installed on the feeding shell (11), and the two first motors (131) are used for driving the driving discs (132) at the two ends of the filter screen (12) to rotate in opposite directions.
4. The sludge drying device for sludge innocent treatment according to claim 2, characterized in that: sludge stirring mechanism (2) are including stirring casing (21), check piece (22) and stirring piece (23), stirring casing (21) set up in the lower extreme of feeding casing (11) and are linked together with discharge gate (112), stirring piece (23) include second motor (231) and set up in second motor (231) epaxial puddler (232) of exporting, second motor (231) fixed mounting is on stirring casing (21), puddler (232) extend the inside of stirring casing (21) and are used for the stirring to mud, bin outlet (211) have been seted up to the lower extreme of stirring casing (21), check piece (22) set up on stirring casing (21) and are used for opening or close bin outlet (211).
5. The sludge drying device for sludge innocent treatment according to claim 4, characterized in that: the grid member (22) comprises a baffle plate (221) and an air cylinder (222), the baffle plate (221) is fixedly connected to the output end of the air cylinder (222), the air cylinder (222) is fixedly arranged on the stirring shell (21), and the air cylinder (222) drives the baffle plate (221) to move so as to open or close the discharge opening (211).
6. The sludge drying device for sludge innocent treatment according to claim 4, characterized in that: sludge drying mechanism (3) are including mummification casing (31) and spiral pushing equipment spare (32), mummification casing (31) are the slope and upwards set up, bin outlet (211) and the bottom intercommunication of mummification casing (31), spiral pushing equipment spare (32) are used for upwards propelling movement with the inside mud of mummification casing (31), the top of mummification casing (31) is provided with mud discharging port (311), the bottom of mummification casing (31) is provided with outlet (312).
7. The sludge drying device for sludge innocent treatment according to claim 6, characterized in that: spiral pushing assembly (32) include third motor (321) and hob piece (322), third motor (321) fixed connection is on mummification casing (31), hob piece (322) set up inside mummification casing (31) side, third motor (321) drive hob piece (322) rotate so that mud rebound.
8. The sludge drying device for sludge innocent treatment according to claim 6, characterized in that: the drying shell (31) is provided with a hot air generator (33), and an air outlet of the hot air generator (33) is communicated with the inside of the drying shell (31).
CN202122132444.9U 2021-09-04 2021-09-04 Sludge drying device for sludge innocent treatment Active CN215756977U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122132444.9U CN215756977U (en) 2021-09-04 2021-09-04 Sludge drying device for sludge innocent treatment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122132444.9U CN215756977U (en) 2021-09-04 2021-09-04 Sludge drying device for sludge innocent treatment

Publications (1)

Publication Number Publication Date
CN215756977U true CN215756977U (en) 2022-02-08

Family

ID=80084271

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202122132444.9U Active CN215756977U (en) 2021-09-04 2021-09-04 Sludge drying device for sludge innocent treatment

Country Status (1)

Country Link
CN (1) CN215756977U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115745357A (en) * 2022-11-17 2023-03-07 安徽金禾实业股份有限公司 Sludge drying feeding device and using method thereof
CN115784555A (en) * 2022-11-30 2023-03-14 北京联创智成自动化技术服务有限公司 Sludge harmless treatment device and process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115745357A (en) * 2022-11-17 2023-03-07 安徽金禾实业股份有限公司 Sludge drying feeding device and using method thereof
CN115784555A (en) * 2022-11-30 2023-03-14 北京联创智成自动化技术服务有限公司 Sludge harmless treatment device and process
CN115784555B (en) * 2022-11-30 2023-08-15 北京联创智成自动化技术服务有限公司 Sludge harmless treatment device and process

Similar Documents

Publication Publication Date Title
CN215756977U (en) Sludge drying device for sludge innocent treatment
CN219112203U (en) Screening plant for pea
CN115388626B (en) Plant rapid drying device and method in closed environment system
CN109179942A (en) A kind of urban sludge drying process device
CN207805184U (en) It is a kind of to produce the waste water filtering used in suede discharge waste water treatment system
CN113198611A (en) Waste treatment device for construction
CN112844196A (en) Braking dispensing equipment of fertilizer production
CN220110561U (en) Collecting assembly for sludge treatment
CN109205945A (en) A kind of sewage treatment unit
CN210193646U (en) Livestock and poultry excrement treatment device
CN111853825A (en) Dry pyrolysis device of rubbish
CN216226107U (en) Landscape garden fallen leaves recycling device
CN215799118U (en) Ecological animal husbandry fecal treatment device
CN214763893U (en) Sludge treatment equipment with self-cleaning function
CN210974450U (en) Garden grass leaf recycling equipment
CN214344845U (en) Be used for city sewer sludge purification device
CN212174760U (en) Sludge separation stacking device
CN111760686A (en) Quick dewatering device is used in chinese-medicinal material processing
CN112915872A (en) Novel rice washing machine and application thereof
CN216320486U (en) Domestic sewage treatment integrated equipment
KR100745630B1 (en) A dryer chamber of garbage disposal apparatus
CN214767736U (en) Macromolecular material production waste material processing apparatus
CN217535687U (en) Wastewater treatment equipment with uniform dosing and impurity removal functions
CN217829129U (en) Prevent blockking up sewage treatment plant convenient to purify domestic waste water
CN109433359A (en) A kind of agitating device for environment-friendly dye

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant