CN113548782A - Sewage treatment device for municipal administration of environmental protection - Google Patents
Sewage treatment device for municipal administration of environmental protection Download PDFInfo
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- CN113548782A CN113548782A CN202110827519.7A CN202110827519A CN113548782A CN 113548782 A CN113548782 A CN 113548782A CN 202110827519 A CN202110827519 A CN 202110827519A CN 113548782 A CN113548782 A CN 113548782A
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- barrel
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- sewage treatment
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- environment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Drying Of Solid Materials (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses environment-friendly municipal sewage treatment equipment, and belongs to the technical field of sewage treatment. This sewage treatment device for municipal administration of environmental protection includes: the bottom wall of the barrel is provided with a discharge hole, a heating wire is embedded in the side wall of the barrel, and the top wall of the barrel is provided with an air pipe communicated with the inner wall of the barrel; the sludge treatment structure comprises a throwing barrel with an open top, wherein the outer wall of the top of the throwing barrel is arranged on the top surface of a barrel body through a bearing, the inner wall of the throwing barrel is fixedly connected with two ends of a cross rod, the middle part of the cross rod is fixedly connected with the end part of a rotating shaft, and the rotating shaft is connected with a driving device; the barrel wall of the barrel is provided with a connecting rod and a plurality of mud outlet holes, the end part of the connecting rod is fixedly connected with the cambered surface scraper blade, the cambered surface scraper blade is attached to the barrel wall at the inner side of the barrel, and the plurality of mud outlet holes are positioned on the barrel cambered surface back to the cambered surface scraper blade. The cambered surface scraper blade presses to the centripetal force of barrel inner wall and provides the balanced reverse bracing power for the cambered surface scraper blade, and the cambered surface scraper blade shovels mud totally, has avoided the problem that the filter screen blockked up to exist in the filtration method.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to environment-friendly municipal sewage treatment equipment.
Background
Municipal sewage contains industrial sewage and domestic sewage which is discharged by people in daily life, wherein the domestic sewage comprises rainwater, bath water, toilet water and waste oil-water mixture generated in cooking in daily life. That is, here, municipal sewage and industrial wastewater which require centralized treatment are included.
The municipal sewage treatment later stage can produce a large amount of sludge, the sludge is a mixture of water and solid particles, the sludge treatment mainly comprises concentration, digestion, dehydration, composting or household landfill, and the sludge dehydration aims to further reduce the volume of the sludge and facilitate subsequent treatment, disposal and utilization. The sludge dewatering mainly removes capillary water among sludge particles and adsorbed water on the surfaces of the particles. The main methods for sludge dehydration include natural drying, vacuum filtration, filter pressing and the like, the natural drying method is most economical, but has low efficiency and is easily influenced by weather, and the problem of filter screen blockage inevitably exists by adopting the filtration method, so that the environment-friendly municipal sewage treatment equipment is provided.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide environment-friendly municipal sewage treatment equipment.
The invention provides an environment-friendly municipal sewage treatment device, which comprises:
the bottom wall of the barrel is provided with a discharge hole, a heating wire is embedded in the side wall of the barrel, and the top wall of the barrel is provided with an air pipe communicated with the inner wall of the barrel;
the sludge treatment structure comprises a throwing barrel with an open top, wherein the outer wall of the top of the throwing barrel is arranged on the top surface of a barrel body through a bearing, the inner wall of the throwing barrel is fixedly connected with two ends of a cross rod, the middle part of the cross rod is fixedly connected with the end part of a rotating shaft, and the rotating shaft is connected with a driving device; the barrel wall of the barrel is provided with a connecting rod and a plurality of mud outlet holes, the end part of the connecting rod is fixedly connected with an arc surface scraper, the arc surface scraper is attached to the barrel wall at the inner side of the barrel, and the plurality of mud outlet holes are positioned on the barrel arc surface back to the arc surface scraper; the heating wires and the driving device are electrically connected with the controller.
Preferably, the plurality of mud outlet holes are vertically divided into a plurality of groups, and the diameter of each adjacent group of mud outlet holes is gradually increased from the clockwise direction of the group of mud outlet holes closest to the connecting rod.
Preferably, the cross bar is fixedly connected with one end of a vibrator, the vibrator is positioned in the throwing barrel, and the vibrator is electrically connected with the controller.
Preferably, the bottom wall of the throwing barrel is fixedly connected with a baffle, and the diameter of the baffle is larger than the outer diameter of the throwing barrel.
Preferably, the number of the air pipes is two, one air pipe is communicated with an air inlet of the dehumidifier, the other air pipe is connected with an air outlet of the dehumidifier, and the dehumidifier is electrically connected with the controller.
Preferably, still include the mechanism of opening a door, the mechanism of opening a door includes door plant, lever, electric telescopic handle and pressure sensor, the edge of articulated discharge gate is passed through to one edge of door plant, and the door plant is located the below of discharge gate, and the one end of door plant fixed connection lever, lever and door plant are located the both sides of articulated shaft respectively, and the other end of lever articulates electric telescopic handle's one end, and electric telescopic handle's the other end articulates on the lateral wall of barrel, and pressure sensor sets up the upper surface at the door plant, pressure sensor ring electric connection controller.
Preferably, the driving device comprises a first belt pulley, a second belt pulley and a motor, the first belt pulley is fixedly connected with the rotating shaft, the first belt pulley and the second belt pulley are connected through a belt, the second belt pulley is fixed on an output shaft of the motor, the motor is arranged at the top of the cylinder body, and the motor is electrically connected with the controller.
Preferably, the bottom surface of the baffle is provided with a temperature sensor, and the temperature sensor is electrically connected with the controller.
Preferably, the lower end cylinder wall of the cylinder body is in an inverted splayed shape, and the cylinder body is provided with supporting legs.
Compared with the prior art, the invention has the beneficial effects that:
1. the environment-friendly municipal sewage treatment equipment of the device can throw sludge onto the inner wall of the cylinder body for heating, drying and scraping at the same time, so that the drying efficiency of the sludge is accelerated; the in-process of this device work, owing to get rid of the bucket and be full of mud in, lead to getting rid of the bucket and rotate the in-process and receive great centripetal force effect, can produce violent shake, cambered surface scraper blade and with the connecting rod can make the focus of getting rid of the bucket partial to cambered surface scraper blade one side, the centripetal force of partial to cambered surface scraper blade one side presses the cambered surface scraper blade to the barrel inner wall, the barrel inner wall provides the reverse bracing power for the cambered surface scraper blade, two forces are balanced, the shake of getting rid of the bucket has been reduced, cambered surface scraper blade presses to the barrel inner wall simultaneously and more is favorable to shoveling the dry mud of barrel inner wall totally, whole process is efficient, the problem of filter screen jam has been avoided the filtering method.
2. The drive arrangement control pivot is clockwise rotation, get rid of the mud of the corresponding volume that the bucket threw away through getting rid of the hole control of equidimension not on the bucket, with the mud of less volume attached to the mud surface of great volume again, the barrel inner wall carries out the drying by heating to the mud of great volume earlier, because the heat conduction efficiency of great volume and the mud of drying is lower, so utilize the hot-air in the barrel to less mud drying by heating, the drying efficiency of mud has both been improved, the consumption of the energy has been practiced thrift again.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
fig. 2 is a schematic structural diagram of the present invention.
Description of reference numerals:
1. the automatic mud-discharging device comprises a cylinder body, 11, a discharging hole, 12, an air pipe, 13, supporting legs, 21, a throwing barrel, 22, a bearing, 23, a cross rod, 231, a vibrator, 24, a rotating shaft, 25, a connecting rod, 26, a mud discharging hole, 27, an arc scraper, 28, a baffle, 31, a door plate, 32, a lever, 33, an electric telescopic rod, 41, a first belt pulley, 42, a second belt pulley and 43, and a motor.
Detailed Description
The following detailed description of specific embodiments of the invention is provided, but it should be understood that the scope of the invention is not limited to the specific embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention provides an environment-friendly municipal sewage treatment device, which comprises the following components in the figures 1-2: the sludge treatment device comprises a barrel body 1 and a sludge treatment structure, wherein a discharge hole 11 is formed in the bottom wall of the barrel body 1, a heating wire is embedded in the side wall of the barrel body 1, and an air pipe 12 communicated with the inner wall of the barrel body 1 is arranged on the top wall of the barrel body 1; the sludge treatment structure comprises a throwing barrel 21 with an open top, the outer wall of the top of the throwing barrel 21 is arranged on the top surface of the barrel 1 through a bearing 22, the inner wall of the throwing barrel 21 is fixedly connected with two ends of a cross rod 23, the middle part of the cross rod 23 is fixedly connected with the end part of a rotating shaft 24, and the rotating shaft 24 is connected with a driving device; a connecting rod 25 and a plurality of mud outlet holes 26 are arranged on the barrel wall of the barrel throwing 21, the end part of the connecting rod 25 is fixedly connected with an arc surface scraper 27, the arc surface scraper 27 is attached to the barrel wall at the inner side of the barrel body 1, and the plurality of mud outlet holes 26 are positioned on the arc surface of the barrel throwing 21 back to the arc surface scraper 27; the heating wires and the driving device are electrically connected with the controller.
The single chip microcomputer is selected as a controller, the controller controls the heating wire to heat the inner wall of the barrel, the driving device drives the rotating shaft and the throwing barrel to rotate at the same time, sludge enters the throwing barrel from the top of the throwing barrel, when the throwing barrel rotates, the sludge is thrown out from the plurality of sludge outlet holes under the action of centripetal force and is attached to the inner wall of the barrel, the sludge is heated by the inner wall of the barrel, the sludge is rapidly dried and agglomerated, and when the sludge is thrown out from the sludge outlet holes, the throwing barrel drives the cambered surface scraper blade to rotate, so that the dried and agglomerated sludge is shoveled and flows out from the discharge hole; the in-process of this device work, owing to get rid of the bucket and be full of mud in, lead to getting rid of the bucket and rotate the in-process and receive great centripetal force effect, can produce violent shake, cambered surface scraper blade and with the connecting rod can make the focus of getting rid of the bucket partial to cambered surface scraper blade one side, the centripetal force of partial to cambered surface scraper blade one side presses the cambered surface scraper blade to the barrel inner wall, the barrel inner wall provides the reverse bracing power for the cambered surface scraper blade, two forces are balanced, the shake of getting rid of the bucket has been reduced, cambered surface scraper blade presses to the barrel inner wall simultaneously and more is favorable to shoveling the dry mud of barrel inner wall totally, whole process is efficient, the problem of filter screen jam has been avoided the filtering method.
Further, as shown in fig. 1, the mud outlet holes 26 are vertically divided into a plurality of groups, and the diameter of each adjacent group of mud outlet holes is gradually increased from the clockwise direction of the group of mud outlet holes 26 closest to the connecting rod 25.
Drive arrangement control pivot clockwise rotation, aim at, when the pivot drives gets rid of the bucket clockwise rotation, the mud that great volume was thrown away in the mud hole of great a set of diameter glues at the barrel inner wall, the barrel inner wall carries out the drying by heating to the mud of great volume, simultaneously the mud hole of less a set of diameter throws away the mud of less volume again and attaches to on the mud that has already dried, hot-air in the barrel and the mud that has drying and certain temperature simultaneously to the mud drying by heating of less volume, then the arc scraper blade will all hang down with the mud that has already dried, the drying efficiency of mud has been improved.
Further, as shown in fig. 1, the cross bar 23 is fixedly connected to one end of the vibrator 231, and the vibrator 231 is located in the swinging barrel 21; the vibrator 231 is electrically connected to the controller.
When the mud water content is lower, the mobility of mud is lower, and the design vibrator aim at is the mobility of the mud that the moisture content is lower with higher speed for mud can be followed each mud hole fast and thrown away.
Further, the bottom wall of the swing bucket 21 is fixedly connected with a baffle 28 as shown in fig. 1, and the diameter of the baffle 28 is larger than the outer diameter of the swing bucket 21.
When the water content of mud is higher, mud can be followed each mud hole fast and flowed out, too fast outflow leads to mud to come too late the inner wall of being got rid of the barrel and will drop downwards, lead to the drying efficiency to mud relatively poor, consequently, design the baffle, when mud flows to the baffle upper surface, along with continuing to rotate, mud is more and more far away from the rotation center of cask, receive great centripetal force simultaneously, make the mud of baffle upper surface be got rid of the barrel inner wall, the relatively poor problem of drying efficiency of the higher mud of this device to the mobility has been avoided.
Furthermore, as shown in fig. 1, there are two air pipes 12, one air pipe 12 is communicated with an air inlet of the dehumidifier, the other air pipe 12 is connected with an air outlet of the dehumidifier, and the dehumidifier is electrically connected with the controller.
Because heating mud can produce a large amount of steam, will cause the heat waste with a large amount of steam of discharging from the trachea, for this reason get rid of steam through the dehumidifier to lead to the barrel internal recycle with hot air of drying by another trachea, practiced thrift the energy.
Further, still include the mechanism of opening the door as fig. 1-2, the mechanism of opening the door includes door plant 31, lever 32, electric telescopic handle 33 and pressure sensor, the edge of door plant 31 passes through the articulated edge of discharge gate 11 of articulated shaft, and door plant 31 is located the below of discharge gate 11, and door plant 31 fixed connection lever 32's one end, lever 32 and door plant 31 are located the both sides of articulated shaft respectively, and the other end of lever 32 articulates the one end of electric telescopic handle 33, and the other end of electric telescopic handle 33 articulates on the lateral wall of barrel 1, and pressure sensor sets up the upper surface at door plant 31, pressure sensor electric connection controller.
The mechanism of opening the door can avoid the heat to discharge the waste of heat that causes from the discharge gate at any time, and when the door plant upper surface of discharge gate was followed to the mud of dry caking, when pressure sensor detected that mud collects certain weight, electric telescopic handle shrink, and the lever drives the door plant and rotates, and mud follows the door plant upper surface landing, accomplishes the discharge action back of dry mud, and electric telescopic handle drives the door plant closure.
Further, as shown in fig. 1, the driving device includes a first belt pulley 41, a second belt pulley 42 and a motor 43, the first belt pulley 41 is fixedly connected to the rotating shaft 24, the first belt pulley 41 is connected to the second belt pulley 42 through a belt, the second belt pulley 42 is fixed to an output shaft of the motor 43, the motor 43 is disposed at the top of the barrel 1, and the motor 43 is electrically connected to the controller.
Further, a temperature sensor is arranged on the bottom surface of the baffle 28, and the temperature sensor is electrically connected with the controller.
When the air temperature in the barrel reaches a set value, the controller controls the heating wire to stop heating, and the sludge is heated and dried by preheating in the barrel, so that energy is saved.
Further, as shown in fig. 1-2, the lower end wall of the cylinder 1 is in an inverted-V shape, and the cylinder 1 is provided with support legs 13.
In order to better discharge the dried sludge smoothly.
The use method of the environment-friendly municipal sewage treatment equipment comprises the following steps:
the municipal sewage treatment equipment of the device is powered on, the controller controls the heating wires to heat the inner wall of the cylinder body, the motor drives the throwing barrel to rotate clockwise, the dehumidifier works to pour sludge into the throwing barrel from the upper part of the throwing barrel, the sludge is thrown out from a plurality of sludge outlet holes, the arc-shaped scraper blades simultaneously scrape dried sludge, the sludge falls off, and when the temperature sensor detects that the air temperature in the cylinder body reaches a set threshold value, the controller controls the heating wires to stop heating; when the temperature sensor detects that the temperature of the air in the cylinder does not reach a set threshold value, the controller controls the heating wire to continue heating; when the pressure sensor detects that the sludge is gathered to a certain weight, the electric telescopic rod contracts, the lever drives the door plate to rotate, the sludge slides off the upper surface of the door plate, and after the discharge action of the dried sludge is completed, the electric telescopic rod drives the door plate to be closed; after the use is finished, the power is cut off.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. An environment-friendly municipal sewage treatment device, which is characterized by comprising:
the heating device comprises a barrel (1), wherein a discharge hole (11) is formed in the bottom wall of the barrel (1), a heating wire is embedded in the side wall of the barrel (1), and an air pipe (12) communicated with the inner wall of the barrel (1) is arranged on the top wall of the barrel (1);
the sludge treatment structure comprises a throwing barrel (21) with an open top, wherein the outer wall of the top of the throwing barrel (21) is arranged on the top surface of a barrel body (1) through a bearing (22), the inner wall of the throwing barrel (21) is fixedly connected with two ends of a cross rod (23), the middle part of the cross rod (23) is fixedly connected with the end part of a rotating shaft (24), and the rotating shaft (24) is connected with a driving device; a connecting rod (25) and a plurality of mud outlet holes (26) are formed in the barrel wall of the throwing barrel (21), the end part of the connecting rod (25) is fixedly connected with an arc surface scraper (27), the arc surface scraper (27) is attached to the barrel wall on the inner side of the barrel body (1), and the mud outlet holes (26) are located on the arc surface of the throwing barrel (21) back to the arc surface scraper (27);
the heating wires and the driving device are electrically connected with the controller.
2. The environment-friendly municipal sewage treatment apparatus according to claim 1, wherein said plurality of sludge discharge holes (26) are vertically divided into a plurality of groups, and the diameter of each adjacent group of sludge discharge holes is gradually increased in a clockwise direction of the group of sludge discharge holes (26) closest to the connecting rod (25).
3. The environment-friendly municipal sewage treatment equipment according to claim 1, wherein the cross bar (23) is fixedly connected to one end of a vibrator (231), the vibrator (231) is located in the swing bucket (21), and the vibrator (231) is electrically connected to the controller.
4. The environment-friendly municipal sewage treatment equipment according to claim 1, wherein the bottom wall of the swing bucket (21) is fixedly connected with a baffle plate (28), and the diameter of the baffle plate (28) is larger than the outer diameter of the swing bucket (21).
5. The environment-friendly municipal sewage treatment equipment according to claim 1, wherein there are two air pipes (12), one air pipe (12) is connected to the air inlet of the dehumidifier, the other air pipe (12) is connected to the air outlet of the dehumidifier, and the dehumidifier is electrically connected to the controller.
6. The environment-friendly municipal sewage treatment equipment according to claim 1, further comprising a door opening mechanism, wherein the door opening mechanism comprises a door plate (31), a lever (32), an electric telescopic rod (33) and a pressure sensor, one edge of the door plate (31) is hinged to the edge of the discharge port (11) through a hinged shaft, the door plate (31) is located below the discharge port (11), the door plate (31) is fixedly connected with one end of the lever (32), the lever (32) and the door plate (31) are respectively located on two sides of the hinged shaft, the other end of the lever (32) is hinged to one end of the electric telescopic rod (33), the other end of the electric telescopic rod (33) is hinged to the side wall of the barrel (1), the pressure sensor is arranged on the upper surface of the door plate (31), and the pressure sensor is electrically connected with the controller.
7. The environment-friendly municipal sewage treatment equipment according to claim 1, wherein the driving means comprises a first belt pulley (41), a second belt pulley (42) and a motor (43), the first belt pulley (41) is fixedly connected to the rotating shaft (24), the first belt pulley (41) and the second belt pulley (42) are connected by a belt, the second belt pulley (42) is fixed to an output shaft of the motor (43), the motor (43) is disposed on the top of the cylinder (1), and the motor (43) is electrically connected to the controller.
8. The environment-friendly municipal sewage treatment equipment according to claim 4, wherein a temperature sensor is provided on the bottom surface of said baffle plate (28), and said temperature sensor is electrically connected to the controller.
9. The environment-friendly municipal sewage treatment equipment according to claim 1, wherein the lower end wall of the cylinder (1) is in the shape of an inverted V, and the cylinder (1) is provided with support legs (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110827519.7A CN113548782B (en) | 2021-07-21 | 2021-07-21 | Sewage treatment device for municipal administration of environmental protection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110827519.7A CN113548782B (en) | 2021-07-21 | 2021-07-21 | Sewage treatment device for municipal administration of environmental protection |
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| CN113548782A true CN113548782A (en) | 2021-10-26 |
| CN113548782B CN113548782B (en) | 2022-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110827519.7A Active CN113548782B (en) | 2021-07-21 | 2021-07-21 | Sewage treatment device for municipal administration of environmental protection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114452689A (en) * | 2022-02-16 | 2022-05-10 | 贵州广铝氧化铝有限公司 | Settling tank for settling red mud in alumina production |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110156297A (en) * | 2019-06-18 | 2019-08-23 | 安徽科技学院 | A kind of rotary drying device for livestock and poultry feces processing |
| CN211838267U (en) * | 2020-03-31 | 2020-11-03 | 黄时斌 | Environment-friendly sludge drying reducing mechanism |
| CN212093100U (en) * | 2020-02-06 | 2020-12-08 | 徐州市晶鑫新材料有限公司 | Civil engineering is with categorised screening sand machine |
| CN112473517A (en) * | 2020-12-15 | 2021-03-12 | 竹溪县隆源大鲵生物开发有限公司 | Giant salamander protein powder processing device |
-
2021
- 2021-07-21 CN CN202110827519.7A patent/CN113548782B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110156297A (en) * | 2019-06-18 | 2019-08-23 | 安徽科技学院 | A kind of rotary drying device for livestock and poultry feces processing |
| CN212093100U (en) * | 2020-02-06 | 2020-12-08 | 徐州市晶鑫新材料有限公司 | Civil engineering is with categorised screening sand machine |
| CN211838267U (en) * | 2020-03-31 | 2020-11-03 | 黄时斌 | Environment-friendly sludge drying reducing mechanism |
| CN112473517A (en) * | 2020-12-15 | 2021-03-12 | 竹溪县隆源大鲵生物开发有限公司 | Giant salamander protein powder processing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114452689A (en) * | 2022-02-16 | 2022-05-10 | 贵州广铝氧化铝有限公司 | Settling tank for settling red mud in alumina production |
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| CN113548782B (en) | 2022-05-17 |
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