CN113426201A - Green construction method for collecting, filter-pressing and treating sludge and wastewater in car washing tank in whole process - Google Patents
Green construction method for collecting, filter-pressing and treating sludge and wastewater in car washing tank in whole process Download PDFInfo
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- CN113426201A CN113426201A CN202110677577.6A CN202110677577A CN113426201A CN 113426201 A CN113426201 A CN 113426201A CN 202110677577 A CN202110677577 A CN 202110677577A CN 113426201 A CN113426201 A CN 113426201A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D36/04—Combinations of filters with settling tanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
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- B01D21/245—Discharge mechanisms for the sediments
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Abstract
The invention relates to the technical field of construction site sludge wastewater treatment, and discloses a green construction method for collecting, filter-pressing and treating sludge wastewater in a carwash tank in the whole process, which comprises the following steps: 1) washing the vehicle in the vehicle washing pool; 2) pretreating in a third-stage sedimentation tank; 3) pumping waste water into the diaphragm pump; 4) squeezing and filtering the waste water; 5) clean water is recycled, the method is matched with a field three-stage sedimentation tank, a filter press is arranged nearby, clean water obtained after filter pressing treatment of sludge wastewater is recycled, sewage generated by car washing is solved on site, discharge of a large amount of sewage and outward transportation of sludge are avoided, after solid-liquid separation of the sludge wastewater, a sludge cake can be used for manufacturing environment-friendly bricks, clean water can be recycled on site, harmless recycling of the sludge wastewater is completely realized, and the effects of green, environment protection and no pollution are achieved; and meanwhile, the solidification of the sludge wastewater reduces the outward transportation frequency of the slurry and reduces the risk of polluting municipal roads and pipelines.
Description
Technical Field
The invention relates to the technical field of construction site sludge wastewater treatment, in particular to a green construction method for collecting, filter-pressing and treating sludge wastewater in a carwash tank in the whole process.
Background
In order to prevent site vehicles from polluting municipal roads, all sites need to be equipped with a car wash basin to wash the vehicles exiting the site. For foundation pit earthwork excavation and cast-in-place pile foundation engineering, a large amount of drilling slag is generated in the construction process, and the mud head vehicle is frequently moved into and out of a construction site due to outward transportation of foundation pit soil, particularly a large amount of sludge wastewater generated by vehicle cleaning during rainy seasons.
At present, a common treatment mode for sludge wastewater generated by car washing is to arrange a three-level sedimentation tank beside a car washing tank, realize the purification of the sludge wastewater through physical sedimentation, and discharge the settled water into a municipal pipeline. The treatment mode needs to regularly clean and transport the sludge and the waste slurry precipitated in the sedimentation tank, and increases the cost of transporting the sludge outside. Because the treatment mode has low purification speed and poor purification effect especially in rainy season, the direct discharge can cause municipal pipeline pollution.
Aiming at the problems, the invention provides a green construction method for collecting, filter-pressing and treating sludge and wastewater in a car washing tank in the whole process.
Disclosure of Invention
The invention aims to provide a green construction method for collecting, filter-pressing and treating sludge wastewater in a car washing tank in the whole process, which is convenient for treating sludge wastewater of workers and treating and utilizing mud, thereby solving the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the green construction method for collecting, filter-pressing and treating sludge and wastewater in the car washing tank in the whole process comprises the following steps:
s01: the method comprises the following steps that (1) car washing is carried out in a car washing pool, the car washing pool is arranged at an entrance and an exit of a construction site, construction site vehicles leave the construction site after being washed in the car washing pool uniformly, the car washing adopts a mode of a wheel washing machine and manual washing, and a special drainage ditch is arranged to connect the car washing pool with a three-stage sedimentation tank, so that sludge wastewater flows into the sedimentation tank uniformly;
s02: pretreating a third-level sedimentation tank, excavating the third-level sedimentation tank, wherein the capacity of the third-level sedimentation tank needs to meet the requirement of the water discharge amount of car washing, after sewage flows into the third-level sedimentation tank, fine particles in the sewage are precipitated to the bottom of the sedimentation tank under the action of gravity, a single-layer bidirectional reinforcing mesh with a certain distance is laid above the third-level sedimentation tank, and guardrails are arranged on the periphery of the tank wall to prevent personnel from falling;
s03: when the diaphragm pump works, the crank link mechanism drives the plunger piston to do reciprocating motion under the driving of the motor, the motion of the plunger piston is transmitted to the diaphragm through working liquid in the liquid cylinder, so that the diaphragm is driven to swing back and forth, when the diaphragm moves to one side of the transmission mechanism, the liquid is sucked in by negative pressure when the pump cylinder works, and when the diaphragm moves to the other side, the liquid is discharged, thereby realizing the conveying of the waste sewage;
s04: squeezing and filtering waste sewage, feeding sludge and waste water pumped by a diaphragm pump into a box type filter press for filtering treatment, feeding filter pulp into each filter chamber for solid-liquid separation by virtue of pressure generated by a feeding pump when the filtering is started, and continuously discharging filtrate from a liquid outlet valve through a drainage plate to obtain usable clean water which is stored in a clean water tank for on-site recycling; squeezing the filter residue to obtain mud cake;
s05: the clean water is recycled, the water in the clean water tank is injected into the spraying vehicle through a pipeline and is used for spraying dust on site, or the clean water is pressurized by the booster pump and then is used for washing the vehicle again.
Further, a floater fishing device is arranged in the third-level sedimentation tank in the step S02, and the floater fishing device is fixedly arranged at the upper end of the third-level sedimentation tank and used for fishing out the sundries floating on the water in the tank.
Furthermore, the floater fishing device is provided with a guide rail column fixedly welded on the inner wall of the three-level sedimentation tank and a movable frame body movably installed on the guide rail column, baffle pieces are movably installed on two sides of the movable frame body, the baffle pieces are connected with a winch installed on the wall of the three-level sedimentation tank, and a fishing net piece is movably installed in the movable frame body.
Further, the movable frame body comprises a connecting box body and lantern rings fixedly welded at two ends of the connecting box body, the lantern rings are movably sleeved on the guide rail columns, and a limiting blocking frame is fixedly arranged in the connecting box body.
Furthermore, water inlets are formed in two sides of the connecting box body, mounting groove cavities are formed in the two ends of the box edges of the two sides and communicated with the water inlets, and guide ring rods are fixedly welded on the connecting box body.
Further, the baffle piece comprises a plate body and a traction rope fixedly installed at the upper end of the plate body, the other end of the traction rope is connected to the take-up reel, a positioning block is arranged at the lower end of the plate body, the positioning block is movably inserted into the installation groove cavity, a return spring is fixedly welded at the upper end of the positioning block, and the upper end of the return spring is fixedly welded at the upper end of the installation groove cavity.
Further, the net dragging component comprises a fixed frame edge and a net bag fixedly installed at the lower end of the fixed frame edge, the fixed frame edge is movably placed in the connecting box body, and the limiting blocking frame arranged at the lower end inside the connecting box body limits the fixed frame edge.
Further, the chamber filter press in the step S04 includes an electric control hydraulic control box and an oil cylinder electrically connected to the electric control hydraulic control box, a hold-down plate is installed on a telescopic end of the oil cylinder, the filter cloth is installed on the filter press plate, and pull plate trolleys are installed on two sides of the fixing frame.
Further, in step S04, the sludge and wastewater pumped by the diaphragm pump is filtered by 50 regularly arranged filter plates with a diameter of 1200mm and filter cloth sandwiched between the filter plates, when the filtration is started, the filtered slurry enters each filtration chamber by means of the pressure generated by the feed pump for solid-liquid separation, and the filtrate is continuously discharged from the liquid outlet valve through the drainage plate as usable clean water; the filter residue is squeezed into mud cakes, and the mud cakes are automatically removed after the filter plates are pulled away one by the plate pulling trolley.
And further, after the mud cakes are automatically unloaded, the mud cakes fall into a filter cake collecting tank which is bricked below the chamber filter press, the filter cakes are discharged and then fall into the collecting tank below, then the filter cakes are loaded and transported, and after the pulling plate trolley is unloaded, the filter cakes remained on the filter cloth are cleaned, the filter cloth is tidied up and leveled again, and the next working cycle is started. When the filtering cloth is damaged after being used for a long time, the filtering cloth is replaced.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention provides a green construction method for collecting, filter-pressing and treating sludge wastewater in a car washing tank in the whole process, which is characterized in that a filter press is arranged nearby in a manner of being matched with a field tertiary sedimentation tank, clear water generated after filter-pressing treatment of the sludge wastewater is recycled, sewage and wastewater generated by car washing are solved on the spot, and discharge of a large amount of sewage and outward transportation of sludge are avoided; the clean water can be recycled for car washing, and can be used for on-site dust prevention and water sprinkling and temporary construction water; compared with the method for directly transporting waste mud, the compressed mud cake has high reduction degree, saves transportation space, has low water content and greatly saves transportation cost; after the sludge wastewater is subjected to solid-liquid separation, the mud cakes can be used for manufacturing environment-friendly bricks, and the clean water can be recycled on site, so that harmless recycling treatment and utilization of the sludge wastewater are completely realized, and the effects of green, environment protection and no pollution are achieved; and meanwhile, the solidification of the sludge wastewater reduces the outward transportation frequency of the slurry and reduces the risk of polluting municipal roads and pipelines.
2. The invention provides a green construction method for collecting, filter-pressing and treating sludge and wastewater in a car washing tank in the whole process, which is characterized in that a moving frame body provided with a fishing net piece is movably arranged on a guide rail column on the inner wall of a three-level sedimentation tank, a baffle piece movably arranged on the moving frame body is connected with a winding reel arranged on the wall of the three-level sedimentation tank, when floating objects exist in the three-level sedimentation tank, a pulling rope on a winding plate body is wound by the winding reel to move the moving frame body, the floating objects in the tank are collected into a net bag of the fishing net piece, the fishing net piece is taken out of the moving frame body to clean the floating objects, water inlets are arranged on both sides of a connecting box body, mounting groove cavities are arranged inside both ends of box edges on both sides, the mounting groove cavities are communicated with water inlets, meanwhile, the plate body is movably inserted on the box edges on both sides of the connecting box body to block the water inlets, when the pulling rope on the winding plate body is wound by the winding reel, the plate body is pulled upwards, the water inlet is opened, the movable frame body is moved, and the floating objects enter the mesh bag from the water inlet.
3. The invention provides a green construction method for collecting, press-filtering and treating sludge and wastewater in a car washing pool in the whole process, wherein a positioning block is arranged at the lower end of a plate body, the positioning block is movably inserted into an installation groove cavity, a return spring is fixedly welded at the upper end of the positioning block, the upper end of the return spring is fixedly welded at the upper end of the installation groove cavity, when a traction rope on a winch retracting plate body pulls a moving frame body to one side, a connecting box body is pulled upwards towards the plate body on the moving side, a water inlet on the side is opened, and floating objects enter a net bag from the water inlet on the side to finish the collection and cleaning of the floating objects, so that the phenomenon that the floating objects enter from the water inlet on one side and leak out from the water inlet on the other side when the connecting box body moves is prevented, and the floating object fishing device can be ensured to carry out reciprocating moving type fishing operation in a three-level sedimentation tank.
Drawings
FIG. 1 is an overall flow chart of the overall process of collecting, filter-pressing and treating green construction method for the sludge and wastewater in the car washing tank;
FIG. 2 is a schematic view of the process principle of the green construction method for collecting, filter-pressing and treating sludge and wastewater in the car washing tank in the whole process;
FIG. 3 is a process flow diagram of the green construction method for collecting, filter-pressing and treating sludge and wastewater in the car washing tank in the whole process;
FIG. 4 is a schematic structural diagram of a box filter press for the green construction method for collecting, filter-pressing and treating sludge and wastewater in a car washing tank in the whole process;
FIG. 5 is a schematic structural view of a floater fishing device in the green construction method for collecting, filter-pressing and treating sludge and wastewater in a car washing tank in the whole process;
FIG. 6 is a schematic structural view of a movable frame and a baffle member of the green construction method for collecting, filter-pressing and treating sludge and wastewater in a car washing tank in the whole process;
FIG. 7 is a schematic structural diagram of a connecting box body and a plate body in the green construction method for collecting, filter-pressing and treating sludge and wastewater in a car washing pool in the whole process;
FIG. 8 is a schematic structural diagram of a fishing net piece of the green construction method for collecting, filter-pressing and treating sludge and wastewater in the car washing pool in the whole process.
In the figure: 2. a chamber filter press; 21. an electrically controlled hydraulic control box; 22. an oil cylinder; 23. a compression plate; 24. a plate pulling trolley; 25. filtering the filter cloth; 3. a floater removing device; 31. a guide rail column; 32. moving the frame body; 321. connecting the box body; 322. a limiting blocking frame; 323. a collar; 324. a water inlet; 325. a guide ring rod; 326. installing a slot cavity; 33. a baffle member; 331. a plate body; 3311. positioning blocks; 3312. a return spring; 332. a pulling rope; 34. fishing the net piece; 341. fixing the frame edge; 342. a mesh bag; 35. and (5) retracting the winch.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, 2 and 3, the green construction method for collecting, filter-pressing and treating sludge and wastewater in the car washing tank in the whole process comprises the following steps:
s01: the method comprises the following steps that (1) car washing is carried out in a car washing pool, the car washing pool is arranged at an entrance and an exit of a construction site, construction site vehicles leave the construction site after being washed in the car washing pool uniformly, the car washing adopts a mode of a wheel washing machine and manual washing, and a special drainage ditch is arranged to connect the car washing pool with a three-stage sedimentation tank, so that sludge wastewater flows into the sedimentation tank uniformly;
s02: pretreating a third-stage sedimentation tank, excavating the third-stage sedimentation tank, wherein the size of the third-stage sedimentation tank is 3.0m multiplied by 2.0m multiplied by 1.5m, the capacity of the third-stage sedimentation tank needs to meet the requirement of the water discharge amount of car washing, after sewage flows into the third-stage sedimentation tank, fine particles in the sewage are precipitated to the bottom of the sedimentation tank under the action of gravity, a single-layer steel bar net piece with a bidirectional interval of 150mm is laid above the third-stage sedimentation tank, and guardrails are arranged on the periphery of the tank wall to prevent personnel from falling;
s03: when the diaphragm pump works, the crank link mechanism drives the plunger piston to do reciprocating motion under the driving of the motor, the motion of the plunger piston is transmitted to the diaphragm through working liquid in the liquid cylinder, so that the diaphragm can be driven to swing back and forth, when the diaphragm moves to one side of the transmission mechanism, the liquid is sucked in by negative pressure when the pump cylinder works, and when the diaphragm moves to the other side, the liquid is discharged, thereby realizing the conveying of the waste sewage;
s04: the sewage is squeezed and filtered, the sludge and the wastewater pumped by the diaphragm pump enter a chamber type filter press 2 for filtration treatment, when the filtration is started, the filter pulp enters each filter chamber for solid-liquid separation by virtue of the pressure generated by a feeding pump, and the filtrate is continuously discharged from a liquid outlet valve through a drainage plate, is available clean water and is stored in a clean water tank for on-site recycling; squeezing the filter residue to obtain mud cake;
s05: the clean water is recycled, the water in the clean water tank is injected into the spraying vehicle through a pipeline and is used for spraying dust on site, or the clean water is pressurized by the booster pump and then is used for washing the vehicle again.
The construction method is matched with a filter press arranged nearby the site tertiary sedimentation tank, clear water obtained after filter pressing treatment of sludge wastewater is recycled, sewage and wastewater generated by car washing are solved on site, discharge of a large amount of sewage and outward transportation of sludge are avoided, and compared with a traditional sedimentation treatment mode of the tertiary sedimentation tank, the construction method is provided with the box-type filter press 2 to carry out secondary treatment on water pretreated by the tertiary sedimentation tank, so that the purification effect of the sludge wastewater is improved, and the purification efficiency is also greatly improved; the clean water can be recycled for car washing, and can be used for on-site dust prevention and water sprinkling and temporary construction water; compared with the method for directly transporting waste mud, the compressed mud cake has high reduction degree, saves transportation space, has low water content and greatly saves transportation cost; after the sludge wastewater is subjected to solid-liquid separation, the mud cakes can be used for manufacturing environment-friendly bricks, and the clean water can be recycled on site, so that harmless recycling treatment and utilization of the sludge wastewater are completely realized, and the effects of green, environment protection and no pollution are achieved; and meanwhile, the solidification of the sludge wastewater reduces the outward transportation frequency of the slurry and reduces the risk of polluting municipal roads and pipelines.
Referring to fig. 5 to 7, further, the floating material scooping device 3 is disposed in the third-stage sedimentation tank in step S02, and the floating material scooping device 3 is fixedly installed at the upper end of the third-stage sedimentation tank to scoop up the impurities floating in the water in the tank.
Preferably, the floater removing device 3 is provided with a guide rail column 31 fixedly welded on the inner wall of the third-level sedimentation tank and a movable frame 32 movably mounted on the guide rail column 31, baffle pieces 33 are movably mounted on two sides of the movable frame 32, the baffle pieces 33 are connected with a retracting winch 35 mounted on the wall of the third-level sedimentation tank, and a net scooping piece 34 is movably mounted in the movable frame 32.
The movable frame body 32 comprises a connecting box body 321 and lantern rings 323 fixedly welded at two ends of the connecting box body 321, the lantern rings 323 are movably sleeved on the guide rail columns 31, limit baffle frames 322 are fixedly arranged inside the connecting box body 321, water inlets 324 are respectively arranged at two sides of the connecting box body 321, mounting groove cavities 326 are respectively arranged inside two ends of box edges at two sides, the mounting groove cavities 326 are communicated with the water inlets 324, a guide ring rod 325 is fixedly welded on the connecting box body 321, the fishing net piece 34 comprises a fixed frame edge 341 and a net bag 342 fixedly arranged at the lower end of the fixed frame edge 341, the fixed frame edge 341 is movably arranged in the connecting box body 321, the limit baffle frames 322 arranged at the lower end inside the connecting box body 321 limit the fixed frame edge 341, the movable frame body 32 provided with the fishing net piece 34 is movably arranged on the guide rail columns 31 on the inner wall of the three-level sedimentation tank, and baffle pieces 33 movably arranged on the movable frame body 32 are connected with the collecting winch 35 arranged on the wall of the three-level sedimentation tank, when floating objects are in the three-level sedimentation tank, the pulling rope 332 on the winch body 331 is retracted through the retracting winch 35, the movable frame body 32 is moved, the floating objects in the tank are collected into the mesh bag 342 of the fishing net 34, the fishing net 34 is taken out of the movable frame body 32, the floating objects are cleaned, the water inlets 324 are formed in two sides of the connecting box body 321, the mounting groove cavities 326 are formed in the two ends of the box edges of the two sides, the mounting groove cavities 326 are communicated with the water inlets 324, the plate body 331 is movably inserted into the box edges of the two sides of the connecting box body 321, the water inlets 324 are blocked, when the pulling rope 332 on the winch body 331 is retracted through the retracting winch 35, the plate body 331 is pulled upwards, the water inlets 324 are opened, the movable frame body 32 is moved, and the floating objects enter the mesh bag 342 from the water inlets 324.
The baffle member 33 comprises a plate body 331 and a pulling rope 332 fixedly installed on the upper end of the plate body 331, the other end of the pulling rope 332 is connected to the winding reel 35, a positioning block 3311 is arranged on the lower end of the plate body 331, the positioning block 3311 is movably inserted into the installation slot 326, a return spring 3312 is fixedly welded on the upper end of the positioning block 3311, and the upper end of the return spring 3312 is fixedly welded on the upper end of the installation slot 326. The lower end of the plate body 331 is provided with a positioning block 3311, the positioning block 3311 is movably inserted into the installation groove 326, a return spring 3312 is fixedly welded at the upper end of the positioning block 3311, the upper end of the return spring 3312 is fixedly welded at the upper end of the installation groove 326, when a pulling rope 332 on a winch 35 retracting plate body 331 pulls the movable frame body 32 to one side, the connecting box body 321 is pulled up to the plate body 331 on the movable side, a water inlet 324 on the side is opened, the floating objects enter the mesh bag 342 from the water inlet 324 on the side, the collection and cleaning of the floating objects are completed, when the connecting box body 321 moves, the floating objects enter from the water inlet 324 on one side, the phenomenon of leakage from the water inlet 324 on the other side occurs, and the floating object fishing device 3 can be ensured to perform reciprocating movable fishing operation in the three-level sedimentation tanks.
Referring to fig. 8, further, the chamber filter press 2 in step S04 includes an electrically controlled hydraulic control box 21 and an oil cylinder 22 electrically connected to the electrically controlled hydraulic control box 21, a pressing plate 23 is installed on the telescopic end of the oil cylinder 22, a filter cloth 25 is installed on the pressing plate, pull plate trolleys 24 are installed on both sides of the fixing frame, sludge and wastewater pumped by the diaphragm pump is filtered by 50 filter plates with a diameter of 1200mm arranged in order and the filter cloth 25 sandwiched between the filter plates, when the filtration is started, the slurry enters each filter chamber for solid-liquid separation by means of the pressure generated by the feed pump, and the filtrate is continuously discharged from the liquid outlet valve through the drainage plate as usable clean water; the filter residues are squeezed to become mud cakes, the pull plate trolleys 24 pull the filter plates one by one, the mud cakes are automatically unloaded, the mud cakes fall into a filter cake collecting tank which is bricked below the chamber filter press 2 after being automatically unloaded, the filter cakes fall into the collecting tank below after being discharged, then the filter cakes are loaded and transported outside, and after the pull plate trolleys 24 discharge the filter cakes, the filter residues remained on the filter cloth 25 are cleaned, the filter cloth 25 is tidied up and leveled again, and the next working cycle is started. When the filter cloth 25 is damaged by long-term use, the filter cloth 25 is replaced.
The process principle is as follows: vehicles are driven out of a site of a construction site and are uniformly driven to a vehicle washing tank for washing vehicles, sludge wastewater generated by vehicle washing flows into a three-stage sedimentation tank through a groove, sewage is pretreated by utilizing the natural sedimentation effect of water, and larger particles in the wastewater are filtered and precipitated; then, the wastewater after the precipitation treatment is pumped into a chamber filter press 2 by a diaphragm pump for pressing, and is treated into clean water and mud cakes. When the filtration is started, the filtered slurry enters each filter chamber through the feed inlet of the thrust plate under the pushing of the feed pump, the filtered slurry is subjected to solid-liquid separation by virtue of the pressure generated by the feed pump, under the combined action of the filter cloth 25 and the pressure extrusion of the squeezer, the solid in the slurry is left in the filter chamber to form a filter cake, and the filtrate is discharged from the liquid outlet valve; after about 30 minutes of squeezing and filtering, the discharged water is stored in a clean water tank for cyclic utilization, the squeezed sludge becomes a plastic round sludge cake, the water content of the round sludge cake is about 30 percent, the round sludge cake can be directly loaded on a car and transported outside, and the sludge cake can be used for manufacturing environment-friendly bricks.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
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 (10)
1. The green construction method for collecting, filter-pressing and treating sludge and wastewater in the car washing tank in the whole process is characterized by comprising the following steps of:
s01: the method comprises the following steps that (1) car washing is carried out in a car washing pool, the car washing pool is arranged at an entrance and an exit of a construction site, construction site vehicles leave the construction site after being washed in the car washing pool uniformly, the car washing adopts a mode of a wheel washing machine and manual washing, and a special drainage ditch is arranged to connect the car washing pool with a three-stage sedimentation tank, so that sludge wastewater flows into the sedimentation tank uniformly;
s02: pretreating a third-level sedimentation tank, excavating the third-level sedimentation tank, wherein the capacity of the third-level sedimentation tank needs to meet the requirement of the water discharge amount of car washing, after sewage flows into the third-level sedimentation tank, fine particles in the sewage are precipitated to the bottom of the sedimentation tank under the action of gravity, a single-layer bidirectional reinforcing mesh with a certain distance is laid above the third-level sedimentation tank, and guardrails are arranged on the periphery of the tank wall to prevent personnel from falling;
s03: the diaphragm pump pumps and pumps waste sewage, the diaphragm pump is installed near squeezing the terrace, one end couples to tertiary sedimentation tank, one end couples to inlet pipe of the pressure filter of the box-type (2), when the diaphragm pump works, the crank link mechanism is under the drive of the electric motor, drive the piston to do the reciprocating motion, the movement of the piston is transmitted to the diaphragm through the working fluid in the fluid cylinder, make the diaphragm swell to and fro, as the diaphragm moves to one side of the drive mechanism, the pump cylinder is worked and is the negative pressure and sucks the liquid, as the diaphragm moves to another side, discharge the liquid, thus realize the transport of the waste sewage;
s04: the sewage is squeezed and filtered, the sludge and the wastewater pumped by the diaphragm pump enter a box type filter press (2) for filtration treatment, when the filtration is started, the filter pulp enters each filter chamber for solid-liquid separation by virtue of the pressure generated by the feeding pump, and the filtrate is continuously discharged from the liquid outlet valve through the drainage plate, is available clean water and is stored in a clean water tank for on-site recycling; squeezing the filter residue to obtain mud cake;
s05: the clean water is recycled, the water in the clean water tank is injected into the spraying vehicle through a pipeline and is used for spraying dust on site, or the clean water is pressurized by the booster pump and then is used for washing the vehicle again.
2. The green construction method for collecting, filter-pressing and treating sludge and wastewater in the car washing tank in the whole process according to claim 1, is characterized in that: and a floater fishing device (3) is arranged in the third-level sedimentation tank in the step S02, and the floater fishing device (3) is fixedly arranged at the upper end of the third-level sedimentation tank and used for fishing out the sundries floating on the water in the tank.
3. The green construction method for collecting, filter-pressing and treating sludge and wastewater in the car washing tank in the whole process according to claim 2 is characterized in that: the floater fishing device (3) is provided with a guide rail column (31) fixedly welded on the inner wall of the three-stage sedimentation tank and a movable frame body (32) movably mounted on the guide rail column (31), baffle pieces (33) are movably mounted on two sides of the movable frame body (32), the baffle pieces (33) are connected with a winch (35) mounted on the wall of the three-stage sedimentation tank, and a fishing net piece (34) is movably mounted in the movable frame body (32).
4. The whole-process collecting, filter-pressing and treating green construction method for the sludge and wastewater in the car washing tank according to claim 3, characterized in that: the movable frame body (32) comprises a connecting box body (321) and lantern rings (323) fixedly welded at two ends of the connecting box body (321), the lantern rings (323) are movably sleeved on the guide rail columns (31), and a limiting stop frame (322) is fixedly arranged inside the connecting box body (321).
5. The whole-process collecting, filter-pressing and treating green construction method for the sludge and wastewater in the car washing tank according to claim 4, characterized in that: the water inlets (324) are formed in the two sides of the connecting box body (321), the mounting groove cavities (326) are formed in the two ends of the box edges of the two sides, the mounting groove cavities (326) are communicated with the water inlets (324), and the guide ring rods (325) are fixedly welded on the connecting box body (321).
6. The whole-process collecting, filter-pressing and treating green construction method for the sludge and wastewater in the car washing tank according to claim 5, characterized in that: the baffle piece (33) comprises a plate body (331) and a pulling rope (332) fixedly installed at the upper end of the plate body (331), the other end of the pulling rope (332) is connected to the winding reel (35), a positioning block (3311) is arranged at the lower end of the plate body (331), the positioning block (3311) is movably inserted into the installation slot cavity (326), a return spring (3312) is fixedly welded at the upper end of the positioning block (3311), and the upper end of the return spring (3312) is fixedly welded at the upper end of the installation slot cavity (326).
7. The whole-process collecting, filter-pressing and treating green construction method for the sludge and wastewater in the car washing pool according to claim 6, is characterized in that: the net fishing piece (34) comprises a fixed frame edge (341) and a net bag (342) fixedly installed at the lower end of the fixed frame edge (341), the fixed frame edge (341) is movably placed in the connecting box body (321), and a limiting baffle frame (322) arranged at the lower end inside the connecting box body (321) limits the fixed frame edge (341).
8. The green construction method for collecting, filter-pressing and treating sludge and wastewater in the car washing tank in the whole process according to claim 1, is characterized in that: the box-type filter press (2) in the step S04 comprises an electric control hydraulic control box (21) and an oil cylinder (22) electrically connected with the electric control hydraulic control box (21), wherein a compression plate (23) is installed at the telescopic end of the oil cylinder (22), the filter cloth (25) is installed on the filter press plate, and pull plate trolleys (24) are installed on two sides of a fixing frame.
9. The whole-process collecting, filter-pressing and treating green construction method for the sludge and wastewater in the car washing tank according to claim 8, characterized in that: in the step S04, the sludge and wastewater pumped by the diaphragm pump is filtered by 50 regularly arranged filter plates with the diameter of 1200mm and filter cloth (25) clamped between the filter plates, when the filtration is started, the filter pulp enters each filter chamber by the pressure generated by the feed pump for solid-liquid separation, and the filtrate is continuously discharged from the liquid outlet valve through the drainage plate to be available clean water; filter residues are squeezed into mud cakes, and the mud cakes are automatically discharged after the filter plates are pulled away one by a pulling plate trolley (24).
10. The whole-process collecting, filter-pressing and treating green construction method for the sludge and wastewater in the car washing tank according to claim 9, which is characterized in that: after the mud cakes are automatically unloaded, the mud cakes fall into a filter cake collecting tank built by bricks below the chamber type filter press (2), the filter cakes are discharged and then fall into the collecting tank below, then the filter cakes are loaded and transported, and after the pulling plate trolley (24) is unloaded, the filter cakes remained on the filter cloth (25) are cleaned, the filter cloth (25) is rearranged and leveled again, and the next working cycle is started. When the filtering cloth (25) is damaged after long-term use, the filtering cloth (25) is replaced.
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