CN112570653A

CN112570653A - Full-wet sand treatment system for water recycling

Info

Publication number: CN112570653A
Application number: CN202011320329.8A
Authority: CN
Inventors: 卢寿安; 李帅权; 何茂勋; 张军让; 吴熙
Original assignee: Yougang New Material Technology Hunan Co ltd
Current assignee: Yougang New Material Technology Hunan Co ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-03-30
Anticipated expiration: 2040-11-23
Also published as: CN112570653B

Abstract

The invention relates to a full-wet sand treatment system for recycling water, which comprises a mechanical regeneration system, a winnowing system, a wet regeneration system and a water treatment system. The air separation system comprises an air separator and a transition sand warehouse which are sequentially connected. The wet regeneration system comprises a first double-stage vertical sand washer, a second double-stage vertical sand washer, a turnover pool, a first sand-water separator, a water-control sand bin, a drying device, a cooling device and a used sand storage sand warehouse which are sequentially connected. The water treatment system comprises an integrated water treatment device, a PH adjusting device and an MVR evaporator which are sequentially connected, and an inlet of the integrated water treatment device is connected with the sewage tank. The full-wet sand treatment system is suitable for the regeneration of various types of sand, the regeneration efficiency and the utilization rate of the sand are effectively improved, and the pollutant emission is less. The water treatment system effectively improves the effect of sewage treatment, avoids causing environmental pollution, fully utilizes useful components in the sewage and avoids wasting resources.

Description

Full-wet sand treatment system for water recycling

Technical Field

The invention relates to the technical field of sand regeneration, in particular to a full-wet sand treatment system for water recycling.

Background

The largest pollution source in casting production is molding materials, mainly used sand. The used foundry sand is recycled, so that the waste sand pollution can be greatly reduced, the production cost is reduced, and the economic benefit of an enterprise is improved. Is an important measure for realizing sustainable development and implementing green casting.

In the process of treating and regenerating sand by the conventional dry regeneration equipment, the demolding effect of the sand is poor, or the sand is seriously pulverized, the residual amount of sodium oxide is high, and the treatment effect on the sand is not ideal, so that the reutilization rate of the sand is low. When the used sand is reused, a large amount of new sand needs to be added to meet the use standard. The existing waste sand regeneration method for wet regeneration can completely wash off the adhesive attached to the surface of the sand without damaging the structure of the sand, but in the sand washing process of wet regeneration, a sand washing device can produce a large amount of sewage, and the sewage can pollute the environment if directly discharged; the traditional sewage treatment method is characterized in that sewage is collected in a centralized mode, then the sewage naturally precipitates in a collecting tank, silt and water in the sewage are separated, and then the silt and the water are respectively treated. In addition, the sewage contains a large amount of industrial salt which can not be reused, thereby causing waste and environmental pollution.

Disclosure of Invention

Technical problem to be solved

In view of the above disadvantages and shortcomings of the prior art, the present invention provides a full wet sand treatment system with water recycling, which solves the technical problems of low recycling rate of used sand and environmental pollution caused by sewage.

(II) technical scheme

In order to achieve the aim, the full-wet sand treatment system for recycling water comprises a mechanical regeneration system, an air separation system, a wet regeneration system and a water treatment system;

the mechanical regeneration system comprises a vibration crushing regenerator, a regenerated sand warehouse, a mechanical friction regenerator and a sand storage hopper which are connected in sequence;

the air separation system comprises an air separator and a transition sand warehouse which are sequentially connected; the inlet of the air separator is connected with the outlet of the sand storage hopper;

the wet regeneration system comprises a first double-stage vertical sand washer, a second double-stage vertical sand washer, a turnover pool, a first sand-water separator, a water control sand bin, a drying device, a cooling device and a used sand storage sand warehouse which are sequentially connected, and further comprises a sewage pool, wherein a water outlet of the water control sand bin and a water outlet of the first sand-water separator are connected with the sewage pool; the inlet of the first double-stage vertical sand washer is connected with the outlet of the transition sand warehouse;

the water treatment system comprises an integrated water treatment device, a PH adjusting device and an MVR evaporator which are sequentially connected, a total water inlet of the integrated water treatment device is connected with the sewage tank, and the water treatment system further comprises a clean water tank connected with the PH adjusting device.

Optionally, the vibration crushing and regenerating machine comprises a crusher mounting seat, a crushing basket and a vibration motor, wherein the crushing basket is mounted on the crusher mounting seat through a spring, and the vibration motor is arranged on the crushing basket and used for driving the crushing basket to vibrate;

the outlet of the crushing basket is connected to the inlet of the regenerated sand silo through a first sending tank.

Optionally, the mechanical friction regenerator comprises a first friction machine and a second friction machine, the first friction machine is arranged above the second friction machine, an inlet of the first friction machine is connected with an outlet of the regenerated sand warehouse, an outlet of the first friction machine is connected with an inlet of the second friction machine, and an outlet of the second friction machine is connected with the sand storage hopper through a second sending tank.

Optionally, the first friction machine and the second friction machine each include a barrel, a fan, a motor, a friction wheel, and a dust collector;

the motor is arranged on the barrel body, the friction wheel is arranged in the barrel body, and an output shaft of the motor is in driving connection with a rotating shaft of the friction wheel;

the barrel body is provided with a sand adding port, a sand discharging port, an air inlet and a dust discharging port;

the dust collector and the fan are both arranged outside the barrel body, the inlet of the dust collector is connected with the dust exhaust port, and the outlet of the fan is connected with the air inlet;

the sand adding port of the first friction machine is connected with the outlet of the regenerated sand warehouse, the sand discharging port of the first friction machine is connected with the sand adding port of the second friction machine, and the sand discharging port of the second friction machine is connected with the inlet of the reserved sand hopper through a second sending tank.

Optionally, the sand storage hopper is arranged above the air classifier;

the air separator comprises an air separation main body, a dust remover and a plurality of groups of baffle plates, wherein the plurality of groups of baffle plates are arranged in the air separation main body, and the plurality of groups of baffle plates are sequentially overlapped from top to bottom;

the winnowing main body comprises a top plate, a discharge hopper and a cylindrical side plate which is connected with the top plate and an inlet of the discharge hopper, wherein a feed inlet is formed in the top plate, and a dust removal opening is formed in the cylindrical side plate;

the feed inlet is connected with an outlet of the sand storage hopper through a sand adding valve; the outlet of the discharge hopper is connected to the inlet of the transition sand warehouse through a third sending tank; and the inlet of the dust remover is connected with the dust removing port.

Optionally, the transition sand reservoir is located above the first dual-stage vertical sand washer, and the first dual-stage vertical sand washer is located above the second dual-stage vertical sand washer;

the first double-stage vertical sand washer with still be provided with second sand water separator between the second double-stage vertical sand washer, first double-stage vertical sand washer second sand water separator and the second double-stage vertical sand washer connects gradually, the entry of first double-stage vertical sand washer with the exit linkage in transition sand storehouse, the export of first double-stage vertical sand washer pass through the chute with the entry linkage of second sand water separator.

Optionally, a plurality of sand suction pumps are arranged in the turnover tank, the wet regeneration system comprises a distribution tank and a plurality of first sand-water separators, an inlet of each sand suction pump is connected with an outlet of the turnover tank, outlets of the plurality of sand suction pumps are all connected with an inlet of the distribution tank, and inlets of the plurality of first sand-water separators are all connected with an outlet of the distribution tank;

the first sand-water separator is arranged above the water-control sand bin, and a sand outlet of the first sand-water separator is connected with an inlet of the water-control sand bin.

Optionally, the wet regeneration system further comprises a conveyor belt, a first hoister, a transition bin, a disk feeder, a second hoister, a hot sand warehouse and a third hoister;

the water control sand bin is arranged above the conveyor belt, an outlet of the water control sand bin is connected with a feeding port of the conveyor belt, and a discharging port of the conveyor belt is connected with an inlet of the first hoister;

the first hoister, the transition bin, the disk feeder, the drying device, the second hoister, the hot sand warehouse, the cooling device, the third hoister and the used sand storage sand warehouse are sequentially connected.

Optionally, the all-wet sand processing system further comprises a pneumatic conveying system, the pneumatic conveying system comprises a new sand storage and a plurality of pneumatic conveying tanks, an outlet of the used sand storage is connected with an inlet of the pneumatic conveying tank through a first flow regulating valve, and an outlet of the new sand storage is connected with an inlet of the pneumatic conveying tank through a second flow regulating valve.

Optionally, the water treatment system further comprises a sludge treatment device, a condensate water recovery device and a salt recovery device;

the integrated water treatment equipment also comprises a water outlet and a sewage draining exit, and the sludge treatment equipment is connected with the sewage draining exit;

the pH adjusting device is connected with the water outlet through a first water pump, the clean water tank is connected with the pH adjusting device through a second water pump, and the MVR evaporator is connected with the pH adjusting device through a third water pump;

the inlet of the condensed water recovery device is connected with the condensed water outlet of the MVR evaporator, and the inlet of the salt recovery device is connected with the evaporation chamber outlet of the MVR evaporator.

(III) advantageous effects

The full-wet sand treatment system is suitable for regeneration of various types of sand, effectively improves the regeneration efficiency and the reutilization rate of the sand, reduces the enterprise expenditure, reduces the waste of the sand, has small pulverization quantity of molding sand and less pollutant discharge, meets the requirement of environmental protection acceptance, and effectively improves the production environment.

Integration water treatment facilities carries out further processing to sewage through PH adjusting device and MVR evaporimeter again after preliminary treatment to sewage, has improved sewage treatment's effect effectively, avoids causing environmental pollution, and the useful composition in the make full use of sewage simultaneously avoids wasting the resource, and the volume of remaining of sodium oxide in the sewage can reach below 0.1%, has realized the sewage zero release.

Drawings

FIG. 1 is a schematic diagram of the overall configuration of an all-wet sand treatment system of the present invention;

FIG. 2 is a schematic structural view of a vibratory fracturing regenerator of the all-wet sand treatment system of the present invention;

FIG. 3 is a schematic structural view of a mechanical friction reclaimer of the all wet sand treatment system of the present invention;

FIG. 4 is a schematic diagram of the overall configuration of the air classification system of the all-wet sand treatment system of the present invention;

FIG. 5 is a schematic diagram of a portion of the wet reclamation system of the all-wet sand treatment system of the present invention;

FIG. 6 is a schematic diagram of a portion of the wet reclamation system of the all-wet sand treatment system of the present invention;

FIG. 7 is a connection diagram of the water treatment system of the present invention.

[ description of reference ]

100: a first sending tank; 200: a second sending tank; 300: a third sending tank;

11: a vibration crushing regenerator; 110: a block sand hopper; 111: a crusher mounting base; 112: a crushing basket; 113: a vibration motor; 114: a spring;

12: a reclaimed sand warehouse;

13: a mechanical friction regenerator; 131: a first friction machine; 132: a second friction machine; 133: a vacuum cleaner;

14: a sand storage hopper;

22: a winnowing machine; 221: a top plate; 222: a discharge hopper; 223: a cylindrical side plate; 224: a baffle plate; 225: a dust remover; 226: a sand adding valve; 23: a transition sand reservoir;

31: a first double-stage vertical sand washer; 32: a second two-stage vertical sand washer; 33: a turnover pool; 34: a first sand-water separator; 35: a water control sand bin; 36: a drying device; 37: a cooling device; 38: a used sand storage sand warehouse; 39: a second sand-water separator;

41: a first hoist; 42: a second hoist; 43: a third hoisting machine; 44: a conveyor belt; 45: a transition bin; 46: a disc feeder; 47: a hot sand reservoir;

51: a pneumatic conveying tank; 52: a first flow regulating valve; 53: a second flow regulating valve; 54: a new sand warehouse;

61: a main water inlet; 62: dosing equipment; 63: an integrated water treatment device; 64: a first water pump; 65: a filtration device; 66: a pH adjusting device; 67: a clean water tank; 68: a second water pump; 69: a sludge pump; 70: a third water pump; 71: a salt recovery facility; 72: sludge treatment equipment; 73: a condensate recovery device; 74: MVR evaporator.

Detailed Description

For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings. In which the terms "upper", "lower", etc. are used herein with reference to the orientation of fig. 1.

For a better understanding of the above-described technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The invention provides a full-wet sand treatment system for recycling water, which comprises a mechanical regeneration system, an air separation system, a wet regeneration system and a water treatment system as shown in figure 1. And directly shakeout the cast and cooled casting mould by a shakeout machine. The hot sand after shakeout is subjected to suspension magnetic separation and then is conveyed to a block sand hopper 110 by a plate chain elevator conveying device for storage. The lump sand is mechanically regenerated by a mechanical regeneration system model, then is dedusted and screened by an air separation system, and is subjected to multistage water washing and drying by a wet regeneration system and then is mixed with new sand for use. The full-wet sand treatment system is suitable for regeneration of various types of sand, the regeneration efficiency and the utilization rate of the sand are effectively improved, the reutilization rate of the sand can reach more than 90%, the enterprise expenditure is reduced, the waste of the sand is reduced, the pulverization quantity of molding sand is small, the pollutant discharge is less, the environment-friendly acceptance requirement is met, and the production environment is favorably improved. The water treatment system is used for treating sewage generated in the wet regeneration process, so that the sewage is prevented from polluting the environment, and water is recycled.

As shown in fig. 1, the mechanical regeneration system includes a vibration crushing regenerator 11, a regenerated sand warehouse 12, a mechanical friction regenerator 13 and a sand storage hopper 14 which are connected in sequence. The vibration crushing regenerator 11 performs vibration crushing on the sand blocks, and the crushed sand is conveyed to a regenerated sand warehouse 12. The regenerated sand warehouse 12 is installed above the mechanical friction regenerator 13, the discharge port of the regenerated sand warehouse 12 is directly connected with the inlet of the mechanical friction regenerator 13, the sand is fed under the action of gravity, and the structure is simple and durable. The sand entering the mechanical friction regenerator 13 is subjected to two mechanical friction regenerations and then is conveyed to a sand storage hopper 14. The air separation system comprises an air separator 22 and a transition sand warehouse 23 which are connected in sequence. The inlet of the air separator 22 is connected to the outlet of the sand storage hopper 14. The sand falling into the air classifier 22 falls in a curtain shape and turns back many times. In the falling and turning process, the air sucked by the dust removal system passes through the sand flow curtain at a certain wind speed to suck the micro powder in the used sand clean and bring the micro powder into the dust remover 225. Conveying the cleaned used sand after air separation to a transition sand warehouse 23. The wet regeneration system comprises a first double-stage vertical sand washer 31, a second double-stage vertical sand washer 32, a turnover tank 33, a first sand-water separator 34, a water control sand bin 35, a drying device 36, a cooling device 37 and an old sand storage sand warehouse 38 which are sequentially connected, and further comprises a sewage tank, wherein a water outlet of the water control sand bin 35 and a water outlet of the sand-water separator are connected with the sewage tank. The inlet of the first double-stage vertical sand washer 31 is connected with the outlet of the transition sand reservoir 23. The first double-stage vertical sand washer 31 and the second double-stage vertical sand washer 32 both adopt conventional double-barrel sand washers, and the cleanness of the sand after twice water washing is higher, so that the subsequent reutilization is facilitated, and the sand reutilization rate is improved. And in the water washing process, the sand is washed in an acid adding mode to remove the residual adhesive on the sand. The first sand-water separator 34 and the water control sand bin 35 are matched to preliminarily remove moisture contained in sand, so that the workload of the drying device 36 is reduced, and the energy consumption in the sand drying process is saved. The dried sand is cooled by a cooling device 37 and then conveyed to an old sand storage sand warehouse 38. The water filtered in the sand-water separator and the water-control sand silo 35 is delivered to a sewage pool for centralized management and subsequent treatment. The water treatment system comprises an integrated water treatment device, a PH adjusting device and an MVR evaporator which are sequentially connected, a total water inlet 61 of the integrated water treatment device is connected with the sewage tank, and the water treatment system further comprises a clean water tank connected with the PH adjusting device. Integration water treatment facilities carries out further processing to sewage through PH adjusting device and MVR evaporimeter again after preliminary treatment to sewage, has improved sewage treatment's effect effectively, avoids causing environmental pollution, and the useful composition in the make full use of sewage simultaneously avoids wasting the resource, and the volume of remaining of sodium oxide in the sewage can reach below 0.1%, has realized the sewage zero release.

Further, as shown in fig. 2, the vibration crushing regenerator 11 includes a crusher mounting seat 111, a crushing basket 112 and a vibration motor 113, wherein a plurality of mounting feet are provided on the crushing basket 112, a mounting seat matching with the mounting feet is provided on the crusher mounting seat 111, and the mounting feet and the mounting seat are connected through a spring 114. The vibration motor 113 is disposed on the basket 112, and when the vibration motor 113 is operated, the basket 112 is driven to vibrate, so that sand lumps entering the basket are vibrated. The invention adopts a conventional vibration crusher to crush the sand blocks. The outlet of the crushing basket 112 is connected to the inlet of the regenerated sand warehouse 12 through the first sending tank 100, the crushed sand blocks are conveyed to the regenerated sand warehouse 12 through the first sending tank 100 to be stored for later use, preparation is made for subsequent wet regeneration, the sand block crushing is a basic process of sand regeneration, manual operation is not needed in the crushing process, and the work efficiency is improved.

As shown in fig. 3, the mechanical friction regenerator 13 includes a first friction machine 131 and a second friction machine 132, the first friction machine 131 is disposed above the second friction machine 132, an inlet of the first friction machine 131 is connected to an outlet of the regenerated sand storage 12, an outlet of the first friction machine 131 is connected to an inlet of the second friction machine 132, and an outlet of the second friction machine 132 is connected to the sand storage hopper 14 through a second sending tank 200. The broken used sand is subjected to friction regeneration through the first friction machine 131 and then subjected to secondary friction regeneration through the second friction machine 132, attachments on the surface of the used sand are fully removed, the sand regeneration effect is improved, the sand washing amount is reduced, the adding proportion of hydrochloric acid can be reduced, the total hydrochloric acid using amount and the wastewater treatment amount are reduced, and the sand washing cost is reduced.

Specifically, as shown in fig. 3, each of the first and

second friction machines

131 and 132 includes a tub, a friction wheel, a fan 133, a motor, and a cleaner. The first friction machine 131 and the second friction machine 132 both further comprise a screening hopper, and a filter screen is arranged in the screening hopper and used for filtering large granular substances in sand. Wherein, the motor sets up on the staving, and the friction pulley sets up in the staving, and the output shaft of motor and the rotation axis drive of friction pulley are connected. The barrel body is provided with a sand adding port, an air inlet, a dust exhaust port and a sand exhaust port. The dust collector and the fan 133 are both arranged outside the barrel body, the inlet of the dust collector is connected with the dust exhaust port, and the outlet of the fan 133 is connected with the air inlet. The blower 133 generates high pressure air and delivers the air into the barrel, and a boiling device is provided in the barrel for supplying air to make the added used sand in a suspended state. The friction wheels made of high-wear-resistant materials are mounted on the two main shafts driven by the motor, and when the friction wheels rotate at a high speed, the friction wheels are stirred and rubbed with the old sand in a suspension state, so that a grease film on the old sand is stripped, and the stripped sand is discharged from the sand discharge port. The air blown by the fan 133 and the peeled grease film are sucked away by the dust collector, so that the coarse-stage winnowing of the reclaimed sand is completed, and the very clean reclaimed sand can be obtained. The sand adding port of the first friction machine 131 is connected with the outlet of the regenerated sand bank 12, the regenerated sand bank 12 enters the first friction machine 131 after being adjusted by the adjusting valve, the sand discharging port of the first friction machine 131 is connected with the sand adding port of the second friction machine 132 so as to perform second friction regeneration, the sand discharging port of the second friction machine 132 is connected with the inlet of the sand storage hopper 14 through the second sending tank 200, and the sand which is subjected to friction regeneration is conveyed to the sand storage hopper 14 through the second sending tank 200 to be stored.

As shown in fig. 4, the sand reserve hopper 14 is disposed above the air classifier 22. The air classifier 22 includes an air classification main body, a dust collector 225, and a plurality of sets of baffles 224. Multiple sets of baffle plates 224 are arranged inside the air separation main body, and the multiple sets of baffle plates 224 are sequentially overlapped from the top to the bottom of the air separation main body. The air separation main body comprises a top plate 221, a discharge hopper 222 and a cylindrical side plate 223 connecting the top plate 221 and the inlet of the discharge hopper 222, wherein a feed inlet is formed in the top plate 221, and a dust removal opening is formed in the cylindrical side plate 223. The feed inlet is connected with the outlet of the reserved sand hopper through a sand adding valve 226, the sand adding valve 226 controls the flow velocity of sand in the reserved sand hopper to enter the air separation main body, the sand enters the baffle plate 224 after entering the air separation main body, and the sand falls into the discharge hopper 222 in a flow curtain shape under the guiding action of the baffle plate 224. The outlet of the discharge hopper 222 is connected to the inlet of the transition sand silo through a third sending tank, and the sand entering the discharge hopper 222 after air separation is conveyed to the transition sand silo through the third sending tank. The inlet of the dust collector 225 is connected with the dust removing opening, the baffle plates 224 make the sand fall in a curtain shape, and a plurality of groups of baffle plates 224 are overlapped from top to bottom, so that the sand in the air separation main body is baffled for a plurality of times and falls in a curtain shape. In the falling and baffling process, the dust remover 225 extracts air from the air separation main body through the dust removing opening, the air sucked by the dust remover 225 passes through the sand flow curtain at a certain air speed, and micro powder in sand is sucked cleanly and carried into the dust remover 225. Is in a flow curtain shape and baffls for many times, increases the direct contact between wind and sand, is more favorable for extracting micro powder in the sand, and improves the dust removal efficiency and the dust removal effect.

As shown in fig. 5, the transition sand reservoir 23 is located above the first dual-stage vertical sand washer 31, the first dual-stage vertical sand washer 31 is located above the second dual-stage vertical sand washer 32, and both the first dual-stage vertical sand washer 31 and the second dual-stage vertical sand washer 32 are conventional sand washers. A second sand-water separator 39 is further arranged between the first double-stage vertical sand washer 31 and the second double-stage vertical sand washer 32, and the first double-stage vertical sand washer 31, the second sand-water separator 39 and the second double-stage vertical sand washer 32 are sequentially connected. The first vertical sand washer cleans sand for the first time, and the first cleaning is completed and then cleaned for the second time after being dehydrated by the second sand-water separator 39. The dehydration process is added in the two-time cleaning, the dehydration process removes the residual sewage in the sand after the first cleaning, the time and the energy consumption of the second cleaning are reduced, the first double-stage vertical sand washer 31 and the second double-stage vertical sand washer 32 are adopted to operate in series, the cleaning efficiency and the cleaning effect are effectively improved, and the sand recycling rate is improved. The inlet of the first double-stage vertical sand washer 31 is connected with the outlet of the transition sand warehouse 23, and the used sand stored in the transition sand hopper enters the first double-stage vertical sand washer 31 through the pneumatic sand adding valve. The outlet of the first double-stage vertical sand washer 31 is connected to the inlet of the second sand-water separator 39 through a chute. When the first double-stage vertical sand washer 31 and the second double-stage vertical sand washer 32 perform sand washing, adding clear water and acid according to a certain proportion of water sand; the sand and the water are mixed, stirred and rubbed in the two double-stage vertical sand washers to play a role in sand washing, and the sand washing time can be adjusted through the rotating speed of the motor and the angle of the stirring blade. The sand-water mixture passing through the first two-stage vertical sand washer 31 enters a second sand-water separator 39 through a chute for dehydration, and sewage enters a sewage pool after being collected; the sand containing certain moisture enters a second double-stage vertical sand washer 32 for secondary sand washing, and the sand-water mixture subjected to secondary sand washing enters a turnover tank 33 for storage.

As shown in fig. 6, a plurality of sand suction pumps, preferably two sand suction pumps, are disposed in the circulation tank 33, the wet regeneration system includes a distribution tank and a plurality of first sand-water separators 34, outlets of the plurality of sand suction pumps are all connected to inlets of the distribution tank, and inlets of the plurality of first sand-water separators 34 are all connected to outlets of the distribution tank. The sand suction pump pumps sand from the turnover pool 33 and then conveys the sand to the distribution groove, the sand is evenly distributed to each first sand-water separator 34 through the distribution groove, and the normal operation of each first sand-water separator 34 is guaranteed, so that the sand-water separation effect is effectively improved. First sand-water separator 34 sets up in the top of accuse water sand silo 35, and the sand export of first sand-water separator 34 and the entry linkage of accuse water sand silo 35, and in reality, the sand after first sand-water separator 34 separates drops to accuse water sand silo 35 in, carries out secondary sand-water separation through accuse water sand silo 35, fully filters the moisture in the dry sand, reduces the time of follow-up stoving.

As shown in fig. 6, the wet regeneration system further includes a conveyor belt 44, a first elevator 41, a transition bin 45, a disk feeder 46, a second elevator 42, a hot sand reservoir 47, and a third elevator 43. The water control sand bin 35 is arranged above the conveyor belt 44, an outlet of the water control sand bin 35 is connected with a feeding port of the conveyor belt 44, and a discharging port of the conveyor belt 44 is connected with an inlet of the first hoister 41. The outlet of the water-control sand bin 35 is positioned above the conveying belt of the conveying belt 44, the sand after water control flows out from the outlet of the water-control sand bin 35, falls onto the conveying belt of the conveying belt 44, and is conveyed to the first lifter 41 through the conveying belt 44 to be lifted into the transition bin 45 for storage. The first hoister 41, the transition bin 45, the disk feeder 46, the drying device 36, the second hoister 42, the hot sand storage 47, the cooling device 37, the third hoister 43 and the used sand storage 38 are connected in sequence, and the disk feeder 46, the drying device 36 and the cooling device 37 are all conventional devices. The sand is conveyed to a transition bin 45 through a first lifting machine 41 after being subjected to water control in a water-controlled sand bin 35, then is conveyed to a sand drying device through a disc feeder 46 for drying and dehydration, the treated sand is conveyed to a hot sand storage 47 through a second lifting machine 42, and the reclaimed sand stored in the hot sand storage 47 is cooled through a cooling device 37 and is conveyed to an old sand storage 38 through a third lifting machine 43.

Specifically, as shown in fig. 6, the all-wet sand processing system further includes an air conveying system, the air conveying system includes a new sand reservoir 54 and a plurality of air conveying tanks 51, the outlet of the used sand storage sand reservoir 38 is connected to the inlet of the air conveying tank 51 through a first flow regulating valve 52, and the outlet of the new sand reservoir 54 is connected to the inlet of the air conveying tank 51 through a second flow regulating valve 53. The pneumatic conveying tank 51 is provided with a plurality of inlets, the plurality of old sand storage sand storehouses 38 and the plurality of new sand storehouses 54 can be connected simultaneously, the first flow regulating valve 52 is used for controlling the sand discharging speed of the old sand storage sand storehouses 38, the second flow regulating valve 53 is used for controlling the sand discharging speed of the new sand storehouses 54, the mixing proportion of the new sand and the old sand is controlled through the first flow regulating valve 52 and the second flow regulating valve 53, the sand reaches the use standard, and the mixed sand is conveyed to a use point through the pneumatic conveying tank 51 to complete the whole sand regeneration process.

As shown in fig. 7, the water treatment system further includes a sludge treatment apparatus, a condensed water recovery apparatus, and a salt recovery apparatus. The integrated water treatment equipment comprises a main water inlet 61, a water outlet and a sewage draining exit, wherein the main water inlet 61 is connected with a sewage pool. The sludge treatment equipment is connected with the sewage draining outlet. The PH adjusting device is connected with the water outlet through the first water pump, the clean water tank is connected with the PH adjusting device through the second water pump, and the MVR evaporator is connected with the PH adjusting device through the third water pump. The inlet of the condensed water recovery device is connected with the condensed water outlet of the MVR evaporator, and the inlet of the salt recovery device is connected with the outlet of the evaporation chamber of the MVR evaporator. The integrated water treatment equipment 63 is used for purifying and filtering sewage generated in the sand regeneration process, primarily treating the sand regeneration sewage, and separating water and particles. Wherein, the integrated water treatment equipment 63 is provided with a main water inlet 61, a water outlet and a sewage outlet, and the main water inlet 61 is connected with a sewage outlet of the sand regeneration equipment. The sludge treatment equipment 72 is connected with the sewage draining outlet, and the sludge treatment equipment 72 treats and recycles the sludge separated from the integrated water treatment equipment 63, so that the direct discharge of the sludge is avoided to cause environmental pollution, useful substances in the sludge are fully utilized, and the waste of resources is reduced. The PH adjusting device 66 is connected to the water outlet through a first water pump 64, the clean water tank 67 is connected to the PH adjusting device 66 through a second water pump 68, and the MVR evaporator 74 is connected to the PH adjusting device 66 through a third water pump 70. The pH adjusting device 66 carries out acid-base adjustment on the clear water after the primary treatment, so that the water body is subjected to subsequent treatment after being neutral or is collected and recycled through the clear water tank 67, the environmental pollution can not be caused, and the waste of water resources is avoided. The MVR (mechanical vapor compression) evaporator is an existing evaporator, when the salt concentration in the PH adjusting device 66 exceeds a set value, water in the PH adjusting device 66 is evaporated and concentrated through the MVR evaporator 74, salt in a water body is obtained through condensation and crystallization, and the salt is recycled while the environment is prevented from being polluted. The first water pump 64, the second water pump 68 and the third water pump 70 are all connected with the controller, the running states of the first water pump 64, the second water pump 68 and the third water pump 70 are controlled in real time through the controller, and the running states of different water pumps are controlled according to different modes, so that automatic running is realized. Integration water treatment facilities 63 carries out further processing to sewage through PH adjusting device 66 and MVR evaporimeter 74 again after carrying out preliminary treatment to sewage, has improved sewage treatment's effect effectively, avoids causing environmental pollution, and the useful composition in the make full use of sewage simultaneously avoids wasting the resource.

Further, the sludge treatment equipment 72 includes a plate-and-frame filter press and a sludge collection tank, and the plate-and-frame filter press is conventional equipment. The liquid inlet of the plate-and-frame filter press is connected with the sewage outlet of the integrated water treatment equipment 63 through a sludge pump 69, the liquid outlet of the plate-and-frame filter press is connected with the PH adjusting equipment 66, and water generated after sludge is treated by the plate-and-frame filter press is conveyed to the PH adjusting equipment 66 for recycling. The sludge collecting tank is arranged below the plate-and-frame filter press and used for receiving sludge generated in the plate-and-frame filter press and carrying out centralized management and utilization on the sludge.

Then, a first liquid outlet and a second liquid outlet are formed in the PH adjusting device 66, the first liquid outlet is connected with the clean water tank 67 through a first electromagnetic valve, the second liquid outlet is connected with the MVR evaporator 74 through a second electromagnetic valve, and the first electromagnetic valve and the second electromagnetic valve are both connected with the controller. The controller controls the operation states of the first solenoid valve, the second water pump 68 and the third water pump 70 in real time. When the first solenoid valve and the second water pump 68 are in an open state, the water in the PH adjusting device 66 is delivered to the clean water tank 67 for centralized management; when the second solenoid valve and the third water pump 70 are in the open state, the water in the PH adjusting device 66 is evaporated by the MVR evaporator 74, and the salt in the water body is condensed out.

Preferably, the PH adjusting device 66 is provided with an acid adding device and an alkali adding device, both the acid adding device and the alkali adding device comprise a storage tank and a feed pump, an outlet of the storage tank is connected with the PH adjusting device 66 through the feed pump, and the feed pump is connected with the controller. Different medicaments are selected according to the pH value of water, and the water body is neutral after the neutralization by acid and alkali. A PH tester and a salinity tester are arranged in the PH adjusting device 66, and both the PH tester and the salinity tester are connected with the controller. The PH value tester is used for detecting the pH value of water in the PH adjusting device 66 and transmitting the pH value to the controller, and the controller selects an acidic medicament or an alkaline medicament according to the pH value. The salinity tester is used to detect the salinity of the water in the PH adjustment device 66 and send the salinity value to the controller, and when the salinity exceeds a set value, the MVR evaporator 74 is activated to operate the corresponding lines.

The sand regeneration sewage treatment system further comprises a dosing device 62, wherein the dosing device 62 comprises a dosing pump and a plurality of medicine storage tanks, outlets of the medicine storage tanks are connected with inlets of the dosing pump, and outlets of the dosing pumps are connected with an integrated water treatment device 63. The integrated water treatment equipment 63 comprises a reaction tank, a dosing equipment 62 and a sedimentation tank. The reaction tank is used for containing sewage generated in the sand regeneration process, and the dosing equipment 62 is connected with the reaction tank. The reaction tank is connected with the sedimentation tank through a slurry pump, a sludge port is formed in the bottom of the sedimentation tank, and the sludge treatment equipment 72 is connected with the sludge port. The medicine storage tank comprises an alkaline medicament storage tank, a PAC storage tank and a PAM storage tank. The alkalinity is preferably sodium hydroxide, which rapidly neutralizes acids in the wastewater. PAC (poly aluminum chloride) is used as a first flocculating agent, PAM (poly acrylamide amides) is used as a second flocculating agent, and the flocculating agent is used for precipitating and removing suspended substances in the sewage under the action of gravity, so that the method is simple, convenient and easy to implement and has good effect.

In addition, sand regeneration sewage treatment system still includes filtration equipment 65, and first water pump 64 passes through filtration equipment 65 and is connected with the delivery port, and the filter is used for filtering the water after the integration water treatment facilities 63 preliminary treatment, guarantees that the aquatic does not contain the suspension pollutant to avoid damaging MVR evaporimeter 74. The sand reclamation sewage treatment system further includes a condensate recovery device 73 and a salt recovery device 71. The inlet of the condensed water recovery device 73 is connected with the condensed water outlet of the MVR evaporator 74, so that the condensed water is recovered and fully utilized, and the resource utilization rate is improved. The inlet of the salt recovery device 71 is connected with the outlet of the evaporation chamber of the MVR evaporator 74, and the salt recovery device 71 recovers the condensed and crystallized salt from the evaporation chamber and then performs centralized management and transportation.

Integration water treatment facilities 63 carries out further processing to sewage through PH adjusting device 66 and MVR evaporimeter 74 again after carrying out preliminary treatment to sewage, has improved sewage treatment's effect effectively, avoids causing environmental pollution, and the while makes full use of mud and salt in the sewage avoid causing the wasting of resources.

The invention can reduce micro powder by mechanical regeneration pretreatment of used sand, reduce the dosage of flocculant in the subsequent sewage treatment after washing, remove about 20 percent of water glass film, reduce the dosage of hydrochloric acid during washing and reduce the amount of water required to be evaporated, thereby reducing part of sewage treatment cost. The equipment configuration has high flexibility, and can be flexibly used according to the determined sand type (suitable for quartz sand and jewel sand) during production and the process improvement (the input proportion of new and old sand, the addition amount of hydrochloric acid during washing, the cleanliness requirement of washing solution, the requirement of water amount and evaporation amount through membrane treatment and the like) after production.

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; either as communication within the two elements or as an interactive relationship of the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, a first feature may be "on" or "under" a second feature, and the first and second features may be in direct contact, or the first and second features may be in indirect contact via an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lower level than the second feature.

In the description herein, the description of the terms "one embodiment," "some embodiments," "an embodiment," "an example," "a specific example" or "some examples" or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present invention.

Claims

1. A full wet sand processing system for recycling water is characterized by comprising a mechanical regeneration system, an air separation system, a wet regeneration system and a water treatment system;

2. The water-recycling full wet sand treatment system according to claim 1, wherein the vibration crushing and regenerating machine comprises a crusher mounting seat, a crushing basket and a vibration motor, the crushing basket is mounted on the crusher mounting seat through a spring, and the vibration motor is arranged on the crushing basket and used for driving the crushing basket to vibrate;

3. The water-recycling full-wet sand treatment system according to claim 2, wherein the mechanical friction regenerator comprises a first friction machine and a second friction machine, the first friction machine is arranged above the second friction machine, an inlet of the first friction machine is connected with an outlet of the regenerated sand storage, an outlet of the first friction machine is connected with an inlet of the second friction machine, and an outlet of the second friction machine is connected with the sand storage hopper through a second sending tank.

4. The water-recycling full wet sand treatment system of claim 3, wherein the first friction machine and the second friction machine each comprise a tub, a fan, a motor, a friction wheel, and a dust collector;

5. The water-recycling full-wet sand treatment system according to any one of claims 1 to 4, wherein the reserve sand hopper is arranged above the air separator;

6. The water-recycling full wet sand treatment system according to any one of claims 1 to 4, wherein the transition sand silo is located above the first dual-stage vertical sand washer, which is located above the second dual-stage vertical sand washer;

7. The water-recycling all-wet sand treatment system as claimed in claim 6, wherein a plurality of sand suction pumps are arranged in the turnover tank, the wet regeneration system comprises a distribution tank and a plurality of first sand-water separators, the inlets of the sand suction pumps are connected with the outlets of the turnover tank, the outlets of the sand suction pumps are all connected with the inlets of the distribution tank, and the inlets of the first sand-water separators are all connected with the outlets of the distribution tank;

8. The water-recycling full wet sand treatment system according to any one of claims 1 to 4, wherein the wet regeneration system further comprises a conveyor belt, a first hoist, a transition bin, a disk feeder, a second hoist, a hot sand reservoir and a third hoist;

9. The water-recycling all-wet sand processing system according to any one of claims 1 to 4, further comprising an air conveying system, wherein the air conveying system comprises a new sand reservoir and a plurality of air conveying tanks, the outlet of the used sand reservoir is connected with the inlet of the air conveying tank through a first flow regulating valve, and the outlet of the new sand reservoir is connected with the inlet of the air conveying tank through a second flow regulating valve.

10. The water-recycling full-wet sand treatment system according to any one of claims 1 to 4, wherein the water treatment system further comprises a sludge treatment device, a condensed water recovery device and a salt recovery device;