Industrial wastewater treatment equipment
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to industrial wastewater treatment equipment.
Background
The lead accumulator has the advantages of stable electromotive force during discharging, small specific energy (electric energy stored in unit weight), strong corrosion to environment, stable working voltage, wide range of use temperature and use current, capability of charging and discharging for hundreds of cycles, good storage performance (especially suitable for dry charge storage), and low cost, thus having wide application. The waste water of the lead storage battery mainly comes from the production processes of formation, smear and the like, and the waste water mainly contains heavy metal pollutants such as lead powder, melted lead and lead sulfate, which seriously affect the physical health of personnel and cause serious harm to the surrounding environment if not treated.
At present, lead removal methods for lead storage battery wastewater mainly comprise a chemical precipitation method, an oxidation-reduction method, an ion exchange method, a ferrite method and the like. The chemical precipitation method is practical, and aims to add a chemical agent into the wastewater, so that the chemical agent and the heavy metal pollutants are subjected to chemical reaction to form insoluble floccules, and then solid-liquid separation is performed, thereby removing the pollutants in the wastewater. The existing solid-liquid separation method is mainly a precipitation method, namely, a flocculating agent is added into a wastewater tank to capture heavy metals, and then solid-liquid separation is realized through natural precipitation. However, the mode of adopting natural precipitation has low efficiency, and influences the waste water treatment efficiency of the lead storage battery. And when the existing solid-liquid separation treatment equipment cleans sediments, the sewage tank needs to be emptied at first, so that workers can enter the sewage tank to clean the sediments, and the mode of cleaning sediments not only influences the wastewater treatment efficiency of the sedimentation tank, increases the labor intensity of the workers, but also influences the health of the workers.
Therefore, the design of the industrial wastewater treatment equipment which has a simple structure, low use cost, low labor intensity of workers and high lead removal efficiency of lead storage battery wastewater and is convenient for cleaning and collecting the lead-containing flocculent precipitate has important practical significance.
Disclosure of Invention
In order to overcome the defects, the invention provides an industrial wastewater treatment device, which specifically adopts the following technical scheme:
an industrial wastewater treatment plant comprising:
the supporting box comprises a supporting box body part, wherein the supporting box body part comprises a supporting box body, a supporting column, a supporting top plate, a thrust ball bearing and an auxiliary supporting tube, and the supporting column is arranged on the supporting box body, the supporting top plate, the thrust ball bearing and the auxiliary supporting tube are arranged on the supporting box body.
Rotatory portion of deposiing, rotatory portion of deposiing sets up on the supporting roof, rotatory portion of deposiing includes rotatory setting tank, deposits collector, driving pipe and power spare, rotatory setting tank sets up thrust ball bearing is last, deposit the collector with the driving pipe all sets up on the rotatory setting tank, power spare sets up on the supporting box body.
The drainage detection portion is arranged on the supporting box body and comprises a water detection part, a water return part and a feeding part, the water detection part is connected with the auxiliary supporting tube, the water return part is connected with the water detection part and the feeding part simultaneously, and the feeding part is arranged on the supporting box body.
Preferably, the supporting box body comprises a box body bottom plate, a box body wall and a box body top plate, the box body wall is arranged on the box body bottom plate, and the box body top plate is arranged on the box body wall; the box body bottom plate is in a circular plate shape, the box body wall is in a cylindrical shape, one end face of the box body wall is fixedly arranged on the box body bottom plate, a vertical hinged door is arranged on the box body wall, and a side wall through hole is formed in the lower end of the box body wall; the box body top plate is in a circular plate shape, a top through hole is formed in the center of the box body top plate, and the box body top plate is arranged on the other end face of the box body wall.
The supporting columns are columnar and are provided with a plurality of supporting columns, and the supporting columns are uniformly and fixedly arranged on the box body bottom plate vertically around the circle center of the box body bottom plate; the supporting top plate is in a circular plate shape, a supporting through hole is formed in the circle center of the supporting top plate, the diameter of the supporting through hole is larger than the outer diameter of the auxiliary supporting pipe, and the diameter of the outer ring of the supporting top plate is smaller than the inner diameter of the wall of the box body.
The supporting top plate is provided with the thrust ball bearing, the outer diameter of the thrust ball bearing is smaller than the diameter of the outer ring of the supporting top plate, and the inner diameter of the thrust ball bearing is larger than the diameter of the supporting through hole.
Preferably, the auxiliary supporting tube is tubular, the bottom end surface of the auxiliary supporting tube is closed, and the top end surface of the auxiliary supporting tube is open; the auxiliary supporting tube is vertically and fixedly arranged at the circle center of the bottom plate of the box body.
Four pipeline through holes are axially formed in the upper end of the auxiliary supporting pipe, a water through pipe is embedded in each pipeline through hole, and the length of each water through pipe is smaller than the inner diameter of the auxiliary supporting pipe; each water service pipe body in the auxiliary supporting pipe is provided with an electromagnetic valve, each electromagnetic valve can be independently opened and closed, and sewage of different water levels can be drained by controlling the opening and closing of the electromagnetic valves.
Preferably, the rotary settling tank is in a hexagonal frustum shape, a bottom plate through hole is formed in the center of a bottom plate of the rotary settling tank, and a top plate through hole is formed in the center of a top plate of the rotary settling tank; the rotary settling box is sleeved on the auxiliary supporting pipe through the bottom plate through hole and the top plate through hole, the bottom plate through hole is connected with the auxiliary supporting pipe in a rotary sealing mode, the top plate through hole is connected with the auxiliary supporting pipe in a rotary mode, and meanwhile the bottom face of the rotary settling box is arranged on the thrust ball bearing.
Preferably, the inner diameters of the bottom plate through hole and the top plate through hole are both larger than the outer diameter of the auxiliary support pipe; at least two rotary sealing rings are arranged between the inner side wall of the through hole of the bottom plate and the outer side wall of the auxiliary supporting tube so as to prevent the wastewater in the rotary settling tank from leaking outwards; and a bearing is embedded in the through hole of the top plate and sleeved on the outer side wall of the upper end of the auxiliary supporting tube so as to prevent the rotary settling box from deflecting during rotation.
Preferably, the number of the sedimentation collectors is six, and the sedimentation collectors are respectively arranged at six corners of the bottom surface of the rotary sedimentation tank; the sediment collector includes communicating pipe, gate valve and sediment collecting pipe, communicating pipe sets up on the rotatory settling tank, the gate valve sets up on communicating pipe, the sediment collector sets up on the gate valve.
Preferably, the communicating pipe is tubular, one end of the communicating pipe is communicated with the corner of the bottom surface of the rotary settling tank, and the other end of the communicating pipe is connected with one end of the gate valve; the gate valve is an internal thread ball valve.
The sedimentation collecting pipe is in a circular arc tubular shape, the central angle of the sedimentation collecting pipe is not more than 90 degrees, one end of the sedimentation collecting pipe is open, and the other end of the sedimentation collecting pipe is closed; the outer wall of one end of the precipitation collecting pipe is provided with threads, one end of the precipitation collecting pipe is connected with the other end of the gate valve, and the threads are matched with the threaded ball valve; the sediment collecting pipe is made of transparent materials.
Preferably, the transmission pipe is tubular, the inner diameter of the transmission pipe is larger than the outer diameter of the auxiliary support pipe, and the outer diameter of the transmission pipe is smaller than the diameter of the support through hole; the transmission pipe is sleeved at the lower end of the auxiliary supporting pipe, and the top end face of the transmission pipe is fixedly arranged on the lower surface of the bottom plate of the rotary settling tank.
The power part comprises a motor, a worm and a turbine, the motor is arranged on the box body bottom plate, the worm is arranged on the motor, the turbine is fixedly sleeved on the outer wall of the bottom end of the transmission pipe, and the worm is meshed with the turbine.
Preferably, the water detecting part comprises a water inlet pipe, a water detecting tank and a water discharging pipe, the water inlet pipe is connected with the auxiliary supporting pipe, the water detecting tank is independently arranged on the ground, and the water detecting tank is respectively connected with the water inlet pipe and the water discharging pipe.
The inlet tube is the tubulose, inlet tube one end is passed the lateral wall through hole with supplementary stay tube bottom through connection, the inlet tube other end with examine water tank through connection.
The water detection tank is in a box, the water detection tank is in through connection with the water discharge pipe, a water quality detector is arranged on the inner bottom surface of the water detection tank, a first electric gate valve is arranged on the water discharge pipe, and the first electric gate valve is electrically connected with the water quality detector.
The water return piece comprises a water pumping pipe, a water pump and a water outlet pipe, the water pump is arranged on the top plate of the box body, the water pump is respectively connected with the water pumping pipe and the water outlet pipe, and the water pump is electrically connected with the water quality detector; one end of the water pumping pipe penetrates through the top plate of the water detection tank, the distance between the bottom end of the water pumping pipe and the bottom plate of the water detection tank is not less than 5cm, and the other end of the water pumping pipe is communicated with the water pump; one end of the water outlet pipe is communicated with the water pump, and the other end of the water outlet pipe is connected with the feeding piece.
Preferably, the feeding part comprises a fixing column, a feeding box and a feeding pipe, the fixing column is arranged on the top plate of the box body, the feeding box is arranged on the fixing column, and the feeding pipe is arranged on the feeding box.
The fixing columns are columnar, a plurality of fixing columns are arranged, and the fixing columns are uniformly and fixedly arranged on the top plate of the box body vertically around the top through holes; the charging box is round platform form, the charging box bottom surface diameter is less than the top surface diameter, the charging box lateral wall is fixed to be set up many fixed capital end.
The feeding pipe is tubular, the top end of the feeding pipe is communicated with the bottom surface of the feeding box, and a second electric gate valve is arranged at the upper end of the feeding pipe; the side wall of the feeding pipe is communicated with the other end of the water outlet pipe, and the height of the other end of the water outlet pipe is lower than that of the second electric gate valve; meanwhile, the side wall of the feeding pipe is communicated with the wastewater injection pipe; the filling tube lower extreme is circular-arc, the filling tube lower extreme inserts in the auxiliary stay pipe, and filling tube bottom end face runs through the auxiliary stay pipe wall with rotatory setting tank link up.
The invention at least comprises the following beneficial effects:
1) the industrial wastewater treatment equipment has the advantages of simple structure, low use cost, low labor intensity of workers and high lead removal efficiency of the lead storage battery wastewater, and is convenient for cleaning and collecting lead-containing flocculent precipitates;
2) the industrial wastewater treatment equipment is provided with the rotary settling tank and the motor, wherein the rotary settling tank is in a hexagonal frustum pyramid shape and can conveniently drive wastewater to rotate; the motor can rotate the rotary settling tank along the circumferential direction, and the floccule settling efficiency can be effectively improved through centrifugal force and the inclined rotary settling tank wall, so that the lead removal efficiency of the lead storage battery wastewater can be effectively improved;
3) the industrial wastewater treatment equipment is provided with the precipitation collector which is connected on six edges of the bottom surface of the rotary precipitation tank in a penetrating way, and because the edges are farthest away from the center of the bottom surface of the rotary precipitation tank, precipitates can be gathered towards the six edges, namely the precipitates automatically enter the precipitation collector, and the precipitation collector can be taken down from the rotary precipitation tank after the precipitation collector is fully collected, so that the lead-containing flocculent precipitate is convenient to clean and collect.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a perspective view of an industrial wastewater treatment apparatus according to the present invention;
FIG. 2 is a left side perspective view of the industrial wastewater treatment facility with the walls of the tank removed in accordance with the present invention;
FIG. 3 is a front perspective view of the industrial wastewater treatment facility with the walls of the tank removed in accordance with the present invention;
FIG. 4 is a perspective view of the industrial wastewater treatment equipment of the present invention after removing the tank wall, the tank top plate and the rotary settling tank.
Wherein: 1-box bottom plate, 2-box wall, 3-box top plate, 4-support column, 5-support top plate, 6-thrust ball bearing, 7-auxiliary support tube, 8-rotary settling box, 9-communicating tube, 10-gate valve, 11-settling collecting tube, 12-driving tube, 13-motor, 14-worm, 15-turbine, 16-water inlet tube, 17-water detecting box, 18-water discharging tube, 19-first electric gate valve, 20-water pumping tube, 21-water pump, 22-water outlet tube, 23-fixed column, 24-feeding tube, 25-feeding box, 26-second electric gate valve, 27-waste water injection tube, 28-pipeline through hole and 29-bearing.
Detailed Description
Technical solutions of the present invention will be described in detail below by way of embodiments with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, B exists alone, and A and B exist at the same time, and the term "/and" is used herein to describe another association object relationship, which means that two relationships may exist, for example, A/and B, may mean: a alone, and both a and B alone, and further, the character "/" in this document generally means that the former and latter associated objects are in an "or" relationship.
According to fig. 1 to 4, an industrial wastewater treatment apparatus includes a support tank portion, a rotary settling portion provided on the support tank portion, and a drainage detection portion connected to the support tank portion.
The supporting box body part comprises a box body bottom plate 1, a box body wall 2, a box body top plate 3, a supporting column 4, a supporting top plate 5, a thrust ball bearing 6 and an auxiliary supporting tube 7, the box body wall 2, the supporting column 4 and the auxiliary supporting tube 7 are all arranged on the box body bottom plate 1, the box body top plate 3 is arranged on the box body wall 2, the thrust ball bearing 6 is arranged on the supporting top plate 5, and the supporting top plate 5 is arranged on the supporting column 4.
The utility model discloses a deposit collection box, including box bottom plate 1, box wall 2, box bottom plate 2, box wall 2, the outer diameter of box wall 2 is circular platelike, box wall 2 is the tube-shape, 2 external diameters of box wall with 1 diameter of box bottom plate is the same, 2 terminal surfaces of box wall are fixed to be set up on the box bottom plate 1, be provided with the vertical hinged door on the box wall 2, the vertical hinged door is used for conveniently collecting the precipitate, be provided with the lateral wall through hole on 2 bottoms of.
The box body top plate 3 is in a circular plate shape, a top through hole is formed in the center of the box body top plate 3, the diameter of the outer ring of the box body top plate 3 is equal to the outer diameter of the box body wall 2, and the box body top plate 3 is arranged on the other end face of the box body wall 2.
The support columns 4 are columnar, the number of the support columns 4 is three, and the support columns 4 evenly surround the circle center of the box bottom plate 1 and are vertically and fixedly arranged on the box bottom plate 1. The supporting top plate 5 is in a circular plate shape, a supporting through hole is formed in the circle center of the supporting top plate 5, the diameter of the supporting through hole is larger than the outer diameter of the auxiliary supporting tube 7, and the diameter of the outer ring of the supporting top plate 5 is smaller than the inner diameter of the box body wall 2.
The supporting top plate 5 is provided with the thrust ball bearing 6, the outer diameter of the thrust ball bearing 6 is smaller than the diameter of the outer ring of the supporting top plate 5, and the inner diameter of the thrust ball bearing 6 is larger than the diameter of the supporting through hole.
The auxiliary supporting tube 7 is tubular, the length of the auxiliary supporting tube 7 is larger than the height of the rotary settling part, the bottom end face of the auxiliary supporting tube 7 is closed, and the top end face of the auxiliary supporting tube is open. The auxiliary supporting tube 7 is vertically and fixedly arranged at the circle center of the box body bottom plate 1.
Four pipeline through holes 28 are axially formed in the upper end of the auxiliary supporting pipe 7, a water pipe is embedded in each pipeline through hole 28, the length of each water pipe is smaller than the inner diameter of the auxiliary supporting pipe 7, an electromagnetic valve is arranged on each water pipe body in the auxiliary supporting pipe 7, and each electromagnetic valve can be independently opened and closed. The sewage of different water levels can be discharged by controlling the opening and closing of the electromagnetic valve.
Rotatory portion of deposiing includes rotatory setting tank 8, deposits collector, drive pipe 12 and power spare, rotatory setting tank 8 sets up thrust ball bearing 6 is last, deposit the collector with drive pipe 12 all sets up rotatory setting tank 8 is last, power spare sets up on the box bottom plate 1.
Rotatory setting tank 8 is hexagonal frustum of a prism form, rotatory setting tank 8 is convenient for drive waste water and is centrifugal rotatory, treat waste water with rotatory setting tank 8 is at the uniform velocity rotatory to speed is the same, and the flocculus in the waste water will receive centrifugal force and gravity action to deposit and pile up rotatory setting tank 8 bottom surface outer edge, in order to make things convenient for the sediment collector collects the precipitate.
The center of the bottom plate of the rotary settling tank 8 is provided with a bottom plate through hole, and the center of the top plate of the rotary settling tank 8 is provided with a top plate through hole. The rotary settling box 8 is sleeved on the auxiliary supporting pipe 7 through the bottom plate through hole and the top plate through hole, the bottom plate through hole is connected with the auxiliary supporting pipe 7 in a rotary sealing mode, the top plate through hole is connected with the auxiliary supporting pipe 7 in a rotary mode, and meanwhile the bottom surface of the rotary settling box 8 is fixedly arranged on the thrust ball bearing 6.
Specifically, the inner diameters of the through hole of the bottom plate and the through hole of the top plate are both larger than the outer diameter of the auxiliary supporting tube 7, and at least two rotary sealing rings are arranged between the inner side wall of the through hole of the bottom plate and the outer side wall of the auxiliary supporting tube 7, so that the through hole of the bottom plate is ensured to be connected with the auxiliary supporting tube 7 in a rotary sealing manner, and the wastewater in the rotary settling tank 8 is prevented from leaking outwards; a bearing 29 is embedded in the through hole of the top plate, and the bearing 29 is sleeved on the outer side wall of the upper end of the auxiliary supporting tube 7, so that the through hole of the top plate is rotatably connected with the auxiliary supporting tube 7, the auxiliary supporting tube 7 can be used for assisting in fixing the rotary settling box 8, and the rotary settling box 8 is prevented from deflecting during rotation.
The sediment collector has six, sediment collector sets up respectively six edges and corners department of rotatory settling tank 8 bottom surface, because six edges and corners of rotatory settling tank 8 bottom surface are furthest apart from the center, so the precipitate receives centrifugal force effect automatic entering sediment collector is interior to improve precipitate collection efficiency.
The sediment collector includes communicating pipe 9, gate valve 10 and sediment collecting pipe 11, communicating pipe 9 sets up on the rotatory settling tank 8, gate valve 10 sets up on communicating pipe 9, the sediment collector sets up on the gate valve 10.
Communicating pipe 9 is tubulose, communicating pipe 9 one end with the edges and corners of rotatory settling tank 8 bottom surface link up, the communicating pipe 9 other end with gate valve 10 one end is connected. Specifically, the gate valve 10 is an internal thread ball valve.
The sedimentation collecting pipe 11 is in a circular arc shape, and the central angle of the sedimentation collecting pipe 11 is not more than 90 degrees. The sedimentation collection pipe 11 is open at one end and closed at the other end. The outer wall of one end of the precipitation collecting pipe 11 is provided with threads, one end of the precipitation collecting pipe 11 is connected with the other end of the gate valve 10, and the threads are matched with the threaded ball valve. Specifically, the sedimentation collection pipe 11 is made of a transparent material.
After the industrial wastewater treatment equipment runs for a period of time, the vertical hinged door is opened to observe whether the precipitation collecting pipe 11 is fully collected or not, after the precipitation collecting pipe 11 is fully collected, the gate valve 10 is closed to take down the precipitation collecting pipe 11, after the precipitation collecting pipe 11 is placed at a storage position, a new precipitation collecting pipe 11 is reinstalled on the gate valve 10, the gate valve 10 is closed and the vertical hinged door is opened, and the industrial wastewater treatment equipment is started to continue to carry out wastewater treatment.
The transmission pipe 12 is tubular, the inner diameter of the transmission pipe 12 is larger than the outer diameter of the auxiliary supporting pipe 7, and the outer diameter of the transmission pipe 12 is smaller than the diameter of the supporting through hole. The transmission pipe 12 is sleeved at the lower end of the auxiliary support pipe 7, and the top end face of the transmission pipe 12 is fixedly arranged on the lower surface of the bottom plate of the rotary settling tank 8.
The power part comprises a motor 13, a worm 14 and a worm wheel 15, the motor 13 is arranged on the box body bottom plate 1, the worm 14 is arranged on the motor 13, the worm wheel 15 is arranged on the transmission pipe 12, and the worm 14 is meshed with the worm wheel 15. Specifically, the worm 14 is arranged on a rotating shaft of the motor 13, and the turbine 15 is fixedly sleeved on the outer wall of the bottom end of the transmission pipe 12. When the motor 13 rotates, the worm 14 can drive the turbine 15 to rotate along the circumferential direction, and the turbine 15 drives the rotary settling tank 8 to rotate along the circumferential direction through the transmission pipe 12.
The drainage detection part comprises a water detection part, a water return part and a feeding part, the water detection part is connected with the auxiliary supporting pipe 7, the water return part is simultaneously connected with the water detection part and the feeding part, and the feeding part is arranged on the top plate 3 of the box body.
The water detection part comprises a water inlet pipe 16, a water detection tank 17 and a water discharge pipe 18, the water inlet pipe 16 is connected with the auxiliary support pipe 7, the water detection tank 17 is independently arranged on the ground, and the water detection tank 17 is respectively connected with the water inlet pipe 16 and the water discharge pipe 18.
The inlet tube 16 is the tubulose, inlet tube 16 one end is passed the lateral wall through hole with supplementary stay tube 7 bottom through connection, the inlet tube 16 other end with examine water tank 17 through connection.
The water detection tank 17 is in a box, the water detection tank 17 is communicated with the water discharge pipe 18, a water quality detector is arranged on the inner bottom surface of the water detection tank 17, and the water quality condition flowing into the water detection tank 17 from the rotary settling tank 8 can be detected in real time by the water quality detector. The water drain pipe 18 is provided with a first electric gate valve 19, and the first electric gate valve 19 is electrically connected with the water quality detector.
When the water quality detector detects that water quality meets the requirements, the first electric gate valve 19 is controlled to open the water drain pipe 18, water in the water detection tank 17 is discharged, and when the water quality detector detects that water quality does not meet the requirements, the water return piece is started, so that the water in the water detection tank 17 is pumped into the rotary settling tank 8 again for purification.
The water return piece comprises a water pumping pipe 20, a water pump 21 and a water outlet pipe 22, the water pump 21 is arranged on the box top plate 3, the water pump 21 is respectively connected with the water pumping pipe 20 and the water outlet pipe 22, and the water pump 21 is electrically connected with the water quality detector. The drinking-water pipe 20 one end is run through examine water tank 17 roof setting, and 20 bottom distances of drinking-water pipe examine water tank 17 bottom plate and not less than 5cmm, so as to do benefit to the drinking-water pipe 20 draws water from examining in the water tank 17. The other end of the water pumping pipe 20 is communicated with the water pump 21. One end of the water outlet pipe 22 is communicated with the water pump 21, and the other end of the water outlet pipe 22 is connected with the feeding piece.
Reinforced piece includes fixed column 23, filling box 25 and filling tube 24, fixed column 23 sets up on the box roof 3, filling box 25 sets up on fixed column 23, filling tube 24 sets up on the filling box 25.
The fixing columns 23 are columnar, the number of the fixing columns 23 is three, and the fixing columns 23 evenly surround the top through holes and are vertically and fixedly arranged on the box top plate 3. The feed box 25 is the round platform form of handstand setting, feed box 25 bottom surface diameter is less than the top surface diameter. The lateral wall of the feed box 25 is fixedly arranged at the top ends of the three fixing columns 23.
The feed tube 24 is tubulose, the 24 tops of feed tube with the feed box 25 bottom surface through connection. The upper end of the charging pipe 24 is provided with a second electric gate valve 26. The lateral wall of the feed pipe 24 is communicated with the other end of the water outlet pipe 22, the other end of the water outlet pipe 22 is lower than the second electric gate valve 26, and the water outlet pipe 22 delivers water into the rotary settling tank 8 through the feed pipe 24. Meanwhile, the side wall of the feeding pipe 24 is in through connection with a waste water injection pipe 27, and the waste water injection pipe 27 is used for injecting waste water of the lead storage battery into the rotary settling tank 8 through the feeding pipe 24. The lower end of the feeding pipe 24 is arc-shaped, the lower end of the feeding pipe 24 is inserted into the auxiliary supporting pipe 7, and the bottom end face of the feeding pipe 24 penetrates through the wall of the auxiliary supporting pipe 7 and is communicated with the rotary settling tank 8.
When needing to reinforced in the rotatory setting tank 8, can send into through the filling tube 24 with expecting through opening second electric gate valve 26 in the rotatory setting tank 8, close second electric gate valve 26 after reinforced completion, the filling box 25 stops reinforced.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.