A sewage liquid concentration and solid dilution separation device

Abstract

The application provides a sewage liquid concentration and solid dilution separation device, belonging to the technical field of wastewater treatment, and can solve the problem that the traditional industrial salt-containing wastewater treatment method cannot effectively separate salt ions carried by solid ice crystals and is difficult to realize continuous production. The device comprises a primary spin-drying and arranging unit, a secondary spin-drying and storing unit, a power unit and a control unit. The primary spin-drying and arranging unit comprises an upper barrel body and a spin-drying and arranging area. The secondary spin-drying and storing unit is arranged below the primary spin-drying and arranging unit and comprises a lower barrel body and a spin-drying and storing area. The power unit comprises a general motor and a lifting motor. The output shaft of the general motor is connected with a rotating shaft penetrating through the primary spin-drying and arranging unit and the secondary spin-drying and storing unit. The output shaft of the lifting motor is connected with a lifting and retracting scraper unit arranged in the upper and lower barrel bodies. The control unit is connected with the general motor and the lifting motor. The application can be applied to the treatment of industrial salt-containing wastewater.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of wastewater treatment, and particularly relates to a sewage liquid concentration and solid desalination separation device. BACKGROUND

[0002] When industrial salt-containing wastewater is treated by low-temperature crystallization reduction, solid crystals are separated in the form of ice crystals, and the salt content of the solid ice crystals is high when the solid ice crystals are separated by traditional centrifugal drying, so that the salt ions carried by the ice crystals cannot be effectively separated, and the solid ice crystals need to be purified by recrystallization. In addition, because the specific gravity of ice is low, the ice crystals cannot be separated by using the specific gravity characteristics. The ice crystals have strong adhesion to the solid surface, and the adhesion becomes stronger as the temperature decreases. Therefore, high-efficiency continuous production cannot be realized, and the treatment efficiency is reduced, and the process operation is complex.

[0003] Therefore, providing a wastewater treatment device for effectively separating solid ice crystals from salt ions carried by the solid ice crystals when treating industrial salt-containing wastewater, and thereby improving the purity of the solid ice crystals is the key to solving the above problems. SUMMARY

[0004] The present application is directed to the technical problem that the salt content of solid ice crystals is high when the traditional industrial salt-containing wastewater treatment method is used, the salt ions carried by the ice crystals cannot be effectively separated, and continuous production cannot be realized. A sewage liquid concentration and solid desalination separation device is provided. The device separates liquid and solid ice crystals, separates the salt ions carried by the solid ice crystals in the form of concentrated liquid, improves the purity of the solid ice crystals, and realizes continuous production.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0006] A sewage liquid concentration and solid desalination separation device, comprising:

[0007] A primary drying and arranging unit, which comprises an upper barrel and a drying and arranging area arranged from top to bottom, the upper barrel is provided with a feeding port and a primary drying concentrated liquid outlet, the upper barrel is used to centrifuge the ice crystal mixture generated by a low-temperature device, the obtained primary solid ice crystals are scraped off to the drying and arranging area to generate secondary ice crystal mixture, and the obtained drying concentrated liquid is discharged through the primary drying concentrated liquid outlet;

[0008] A secondary drying and storing unit, which is arranged below the primary drying and arranging unit and controls the secondary ice crystal mixture to enter through a movable baffle, and comprises a lower barrel and a drying and storing area arranged from top to bottom, the lower barrel is provided with a secondary drying liquid water outlet, and the lower barrel is used to centrifuge the secondary ice crystal mixture, the obtained secondary solid ice crystals are scraped off to the drying and storing area, and the obtained drying liquid is discharged through the secondary drying liquid water outlet.

[0009] a power unit comprising a common motor and a lifting motor, an output shaft of the common motor being connected to a rotating shaft penetrating through the primary spin-drying and arranging unit and the secondary spin-drying and storing unit; an output shaft of the lifting motor being connected to a lifting telescopic scraper unit arranged in the upper and lower barrel bodies;

[0010] a control unit connected to the common motor and the lifting motor, and issuing control instructions to the common motor and the lifting motor respectively to control the common motor to drive the rotating drum in the upper and lower barrel bodies to rotate and control the lifting motor to drive the lifting telescopic scraper unit to open or shrink.

[0011] In an embodiment, a first rotating drum is arranged in the upper barrel body, and a gap is arranged between the upper barrel body and the first rotating drum, and the primary spin-drying concentrated liquid outlet is arranged at the lower end of the upper barrel body and communicates with the gap.

[0012] A plurality of through holes are arranged on the first rotating drum, and the ice crystal mixture generated by the low-temperature device is sent into the first rotating drum through the feeding port arranged at the upper end of the upper barrel body to centrifuge, so that the obtained primary solid ice crystals adhere to the inner wall of the first rotating drum, and the obtained spin-drying concentrated liquid flows out of the through holes and is discharged through the primary spin-drying concentrated liquid outlet.

[0013] In an embodiment, the spin-drying arranging area is further provided with an arranging area nozzle, and the non-low-temperature frozen wastewater is sent into the spin-drying arranging area through the arranging area nozzle to generate secondary ice crystal mixture by mixing with the primary solid ice crystals.

[0014] In an embodiment, a second rotating drum is arranged in the lower barrel body, and a gap is arranged between the lower barrel body and the second rotating drum, and the secondary spin-drying liquid outlet is arranged at the lower end of the lower barrel body and communicates with the gap.

[0015] A plurality of through holes are arranged on the second rotating drum, and the secondary ice crystal mixture is centrifuged into the second rotating drum by opening the movable baffle, so that the obtained secondary solid ice crystals adhere to the inner wall of the second rotating drum, and the obtained spin-drying liquid flows out of the through holes and is discharged through the secondary spin-drying liquid outlet.

[0016] In an embodiment, the spin-drying storing area is further provided with a storing area nozzle and a solid discharge port, and the low-temperature fresh water is sent into the spin-drying storing area through the storing area nozzle to flush the secondary solid ice crystals and discharge them from the solid discharge port.

[0017] In an embodiment, the rotating shaft runs through the central position of the sewage liquid concentration and solid desalination separation device from top to bottom, the output shaft of the common motor is connected with the lower end of the rotating shaft, and the rotating shaft is driven to rotate by starting the common motor, and then the rotating drum in the upper and lower barrels is driven to rotate.

[0018] In an embodiment, the upper end of the rotating shaft is provided with a vertical strip-shaped through hole, and the lifting shaft is inserted into the vertical strip-shaped through hole; wherein the lifting shaft comprises a non-rotating shaft segment and a rotating shaft segment arranged from top to bottom, and the two are fixed by bearings, and the non-rotating shaft segment is connected with the output shaft of the lifting motor.

[0019] In an embodiment, the lifting telescopic scraper unit comprises a shaft sleeve, a linear slide rail, a rotating telescopic mechanism and a telescopic scraper.

[0020] The shaft sleeve is arranged outside the rotating shaft, and a rotating track and a vertical strip-shaped through hole are arranged on the shaft sleeve, the vertical strip-shaped through hole is arranged corresponding to the rotating track, a radially arranged connecting rod is arranged inside the rotating shaft segment of the lifting shaft, the two ends of the connecting rod extend outward through the two vertical strip-shaped through holes and the rotating track, and then extend to the outside of the shaft sleeve, the connecting rod is limited in the rotating track and can slide freely, and the connecting rod is connected with the rotating telescopic mechanism through a connecting rod; the linear slide rail is arranged parallel to the shaft sleeve and connected with the outer wall of the shaft sleeve, the linear slide rail can rotate with the rotation of the shaft sleeve, and the lower end of the linear slide rail is connected with the rotating telescopic mechanism through a linear bearing.

[0021] The rotating telescopic mechanism is connected with the lifting shaft through a gripper, the rotating telescopic mechanism is arranged on the shaft sleeve and the linear slide rail, and can drive the lifting shaft to move up and down by starting the lifting motor, and then drive the rotating telescopic mechanism to move up and down along the arrangement direction of the shaft sleeve and the linear slide rail.

[0022] The telescopic scraper is arranged below the rotating telescopic mechanism and is slidingly connected with the rotating telescopic mechanism.

[0023] In an embodiment, the rotating track further comprises a vertical track segment and an arc-shaped track segment, and the two ends of the arc-shaped track are connected with the two ends of the vertical track segment to form an arc-shaped track.

[0024] The rotating telescopic mechanism is a central hollow disc-shaped structure, a plurality of sliding blocks and a plurality of scraper telescopic tracks are arranged on the disc-shaped structure, and the scraper telescopic tracks are distributed radially around the central hollow.

[0025] The telescopic scraper is a central hollow disc structure surrounded by several fan-shaped scrapers, each of which is provided with a radial sliding rail, and the slider on the rotating telescopic mechanism freely slides along the radial sliding rail;

[0026] The lifting telescopic scraper unit has a first state that when the lifting motor drives the lifting shaft to move up and down, the connecting rod slides along the vertical rail section, and in turn drives the rotating telescopic mechanism and the telescopic scraper to move up and down, and a second state that when the lifting motor drives the lifting shaft to move up and down, the connecting rod slides along the arc-shaped rail section, drives the shaft sleeve, the linear sliding rail and the rotating telescopic mechanism to rotate at the same time, makes the slider on the rotating telescopic mechanism slide along the radial sliding rail, and pushes the telescopic scraper to move up and down to realize the opening and closing of the telescopic scraper.

[0027] In an embodiment, the sewage liquid concentration and solid desalination separation device further comprises an electric push rod installed on the outer wall of the spin finishing area, the electric push rod is connected with the movable baffle, and the opening and closing of the movable baffle is controlled through the electric push rod; wherein the movable baffle is provided as a plane or a curved surface.

[0028] Compared with the prior art, the advantages and positive effects of the present application are that:

[0029] 1. The sewage liquid concentration and solid desalination separation device is provided, which separates the ice crystal mixture generated by a low-temperature device through two times of centrifugation by setting a primary spin finishing and finishing unit and a secondary spin finishing and collection unit; wherein the concentrated liquid is obtained through primary centrifugal spinning, and the obtained solid ice crystal enters the spin finishing area, and under a suitable rotating speed (1-5 m / s), the salt ions between the solid crystals are released, and then through secondary centrifugal spinning, the solid ice crystal with lower salt content is obtained.

[0030] 2. The sewage liquid concentration and solid desalination separation device is provided, which realizes the telescopic scraper through the rotating telescopic mechanism driven by the lifting motor, the scraper is stretched to touch the inner wall of the drum, and the ice crystal is scraped off, and at the same time, the impeller effect is realized, and the material is distributed to the cylinder wall under the action of centrifugal force.

[0031] 3. The sewage liquid concentration and solid desalination separation device is provided, which realizes the separation of liquid and solid ice crystals at the same time, separates the salt ions carried by the solid ice crystal in the form of concentrated liquid, improves the purity of the solid ice crystal, and realizes continuous production.

[0032] 4. The sewage liquid concentration and solid desalination separation device has the characteristics of reasonable structure design, simple operation and high production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 A semi-sectional view of the sewage liquid concentration and solid desalination separation device provided by the present application;

[0034] Figure 2 A connection diagram of the rotating shaft and the lifting telescopic scraper unit provided by the present application;

[0035] Figure 3 A connection perspective view of the rotating shaft and the lifting telescopic scraper unit provided by the present application;

[0036] Figure 4 A structural diagram of the rotating telescopic mechanism provided by the present application;

[0037] Figure 5 A structural diagram of the telescopic scraper provided by the present application.

[0038] In the above drawings, the meanings of various reference signs are as follows:

[0039] 1, upper barrel body; 2, spin-drying arrangement area; 3, lower barrel body; 4, spin-drying storage area; 5, first rotating drum; 6, second rotating drum; 7, lifting telescopic scraper unit; 8, feed inlet; 9, primary spin-drying concentrated liquid outlet; 10, arrangement area nozzle; 11, secondary spin-drying liquid water outlet; 12, storage area nozzle; 13, solid discharge port; 14, ordinary motor; 15, lifting motor; 16, rotating shaft; 17, lifting shaft; 18, movable baffle; 19, electric push rod; 20, connecting rod;

[0040] 71, shaft sleeve; 72, linear slide rail; 73, rotating telescopic mechanism; 74, telescopic scraper; 75, linear bearing; 76, vertical bar-shaped through hole; 77, connecting rod; 711, rotating rail; 731, sliding block; 732, scraper telescopic rail; 741, radial slide rail;

[0041] 171, non-rotating shaft section; 172, rotating shaft section; 173, bearing. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the present application clearer and more understandable, the present application is described and explained below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application. Based on the examples provided by the present application, all other examples obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0043] It is apparent that the drawings in the following description merely show some examples or embodiments of the present application, and the present application can be applied to other similar situations without creative efforts by those skilled in the art based on these drawings. In addition, it can be understood that, although the efforts made in the development process can be complicated and lengthy, some modifications, such as design, manufacture or production, made on the basis of the disclosed technical content of the present application by those skilled in the art related to the disclosed content of the present application are only routine technical means, and should not be understood as insufficient disclosure of the present application.

[0044] In the present application, the term "embodiment" means that the specific features, structures or properties described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the described embodiments of the present application can be combined with other embodiments without conflict.

[0045] Unless otherwise defined, the technical terms or scientific terms involved in the present application should be understood as the usual meaning by those skilled in the art in the technical field to which the present application belongs. The terms "one", "a", "an", "the" and the like similar words involved in the present application do not represent quantity limitation, but can represent singular or plural. The terms "include", "contain", "have" and any variations thereof involved in the present application are intended to cover non-exclusive inclusion; for example, a process, method, system, product or device including a series of steps or modules (units) is not limited to the listed steps or units, but can also include steps or units not listed, or can also include other steps or units inherent to the process, method, product or device. The terms "connected", "connected" and the like similar words involved in the present application are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. The term "multiple" refers to two or more. The term "and / or" describes the association between the associated objects, which means that there can be three relationships, for example, "A and / or B" can represent three cases: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects. The terms "first", "second" and the like involved in the present application are merely to distinguish similar objects, and do not represent a specific order for the objects.

[0046] The embodiment of the present application provides a sewage liquid concentration and solid dilution separation device, Figures 1-5The images show a half-sectional view, a schematic diagram of the connection between the rotating shaft and the lifting and telescopic scraper unit, a perspective view of the connection between the rotating shaft and the lifting and telescopic scraper unit, a schematic diagram of the rotating telescopic mechanism, and a schematic diagram of the telescopic scraper structure, all according to embodiments of the present invention. (Reference) Figures 1-5 As shown, the wastewater liquid concentration and solid desalination separation device includes at least: a primary centrifugation and sorting unit, a secondary centrifugation and storage unit, a power unit, and a control unit. The primary centrifugation and sorting unit includes an upper tank 1 and a centrifugation and sorting zone 2 arranged from top to bottom. The upper tank 1 has an inlet 8 and a primary centrifugation concentrate outlet 9. The upper tank 1 is used to centrifuge the ice crystal mixture generated by the low-temperature equipment. The resulting primary solid ice crystals are scraped off to the centrifugation and sorting zone 2 and generate a secondary ice crystal mixture. The resulting centrifugation concentrate is discharged through the primary centrifugation concentrate outlet 9. The secondary centrifugation and storage unit is located below the primary centrifugation and sorting unit and controls the entry of the secondary ice crystal mixture through a movable baffle 18. It includes a lower tank 3 and a centrifugation and storage zone 4 arranged from top to bottom. The lower tank 3 has a secondary centrifugation and storage zone 4. The dry liquid outlet 11 and the lower barrel 3 are used to centrifuge the secondary ice crystal mixture. The resulting secondary solid ice crystals are scraped off to the spin-drying and collection area 4, and the resulting spin-dried liquid is discharged through the secondary spin-drying liquid outlet 11. The power unit includes a general motor 14 and a lifting motor 15. The output shaft of the general motor 14 is connected to the rotating shaft 16 that passes through the primary spin-drying and sorting unit and the secondary spin-drying and collection unit. The output shaft of the lifting motor 15 is connected to the lifting telescopic scraper unit 7 installed in the upper barrel 1 and the lower barrel 3. The control unit is connected to the general motor 14 and the lifting motor 15. By sending control commands to the general motor 14 and the lifting motor 15 respectively, the control unit controls the general motor 14 to drive the rotating drum inside the upper barrel 1 and the lower barrel 3 to rotate, and controls the lifting motor 15 to drive the lifting telescopic scraper unit 7 to open or retract.

[0047] Among them, reference Figure 1 A first rotating drum 5 is installed inside the upper barrel 1, and a gap is provided between the upper barrel 1 and the first rotating drum 5. The primary spin-drying concentrate outlet 9 is located at the lower end of the upper barrel and is connected to the gap. The first rotating drum 5 has multiple through holes. The ice crystal mixture generated by the low-temperature equipment is fed into the first rotating drum 5 through the feed port 8 located at the upper end of the upper barrel 1 for centrifugation, so that the resulting primary solid ice crystals adhere to the inner wall of the first rotating drum 5. The resulting spin-drying concentrate flows out from the through holes and is then discharged through the primary spin-drying concentrate outlet 9. Preferably, there are two primary spin-drying concentrate outlets 9 on both sides of the upper barrel 1 to facilitate the rapid discharge of the spin-drying concentrate.

[0048] Further reference Figure 1 The spin-drying and finishing zone 2 is also equipped with a finishing zone nozzle 10, through which the uncooled frozen wastewater is tangentially fed into the spin-drying and finishing zone 2 and mixed with the primary solid ice crystals to generate a secondary ice crystal mixture.

[0049] Wherein, reference Figure 1 The second rotating drum 6 is installed in the lower barrel 3, and a gap is provided between the lower barrel 3 and the second rotating drum 6. The secondary dewatering liquid outlet 11 is provided at the lower end of the lower barrel 3 and is in communication with the gap. The second rotating drum 6 is provided with a plurality of through holes. The secondary ice crystal mixture is centrifuged into the second rotating drum 6 by opening the movable baffle 18, so that the obtained secondary solid ice crystals adhere to the inner wall of the second rotating drum 6, and the obtained dewatering liquid flows out of the through holes and is discharged through the secondary dewatering liquid outlet 11. Preferably, two secondary dewatering liquid outlets 11 are provided on both sides of the lower barrel 3, so that the dewatering liquid can be quickly discharged.

[0050] Further, reference Figure 1 The dewatering storage area 4 is also provided with a storage area nozzle 12 and a solid discharge port 13. The low-temperature fresh water is sent into the dewatering storage area 4 through the storage area nozzle 12 to flush the secondary solid ice crystals and discharge them from the solid discharge port 13.

[0051] Wherein, reference Figure 1 The rotating shaft 16 penetrates the central position of the entire sewage liquid concentration and solid desalination separation device from top to bottom. The output shaft of the ordinary motor 14 is connected to the lower end of the rotating shaft 16. By starting the ordinary motor 14, the rotating shaft 16 is driven to rotate, and in turn drives the rotating drum in the upper barrel 1 and the lower barrel 3 to rotate.

[0052] Wherein, reference Figure 1 The upper end of the rotating shaft 16 is provided with a vertical strip-shaped through hole, and the lifting shaft 17 is inserted into the vertical strip-shaped through hole. Reference Figure 4 The lifting shaft 17 further includes a non-rotating shaft segment 171 and a rotating shaft segment 172 arranged from top to bottom, and the two are fixed through a bearing 173. The non-rotating shaft segment 171 is connected to the output shaft of the lifting motor 15.

[0053] Next, reference Figures 2-3 The structure and working process of the lifting telescopic scraper unit 7 in the device are described in detail.

[0054] The lifting telescopic blade unit 7 comprises a shaft sleeve 71, a linear slide rail 72, a rotary telescopic mechanism 73 and a telescopic blade 74; wherein the shaft sleeve 71 is arranged outside the rotating shaft 16, and the shaft sleeve 71 is provided with a rotary track 711 and a vertical strip-shaped through hole 76, the vertical strip-shaped through hole 76 is arranged corresponding to the rotary track 711, a connecting rod 20 is penetrated through inside the rotary shaft segment 172 of the lifting shaft 17 in a radial direction, the connecting rod 20 extends outward at both ends and penetrates through the vertical strip-shaped through hole 76 and the rotary track 711, and then extends to outside of the shaft sleeve 71, the connecting rod 20 is limited in the rotary track 711 and the vertical strip-shaped through hole 76 to freely slide, and the connecting rod 20 is connected with the rotary telescopic mechanism 73 through a connecting rod 77; the linear slide rail 72 is arranged parallel to the shaft sleeve 71 and connected with the outer wall of the shaft sleeve 71, the linear slide rail 72 can rotate with the shaft sleeve 71, the lower end of the linear slide rail 72 is connected to the rotary telescopic mechanism 73 through a linear bearing 75, and the rotary telescopic mechanism 73 and the telescopic blade 74 make lifting movement on the linear slide rail 72 through the linear bearing 75.

[0055] Further, the rotary telescopic mechanism 73 is connected with the lifting shaft 17 through a gripper (not shown in the figure), the rotary telescopic mechanism 73 is arranged on the shaft sleeve 71 and the linear slide rail 72, and can drive the lifting shaft 17 to make lifting movement by starting the lifting motor 15, so as to drive the rotary telescopic mechanism 73 to make lifting movement along the arrangement direction of the shaft sleeve 71 and the linear slide rail 72; the telescopic blade 74 is arranged below the rotary telescopic mechanism 73 and is slidingly connected with the rotary telescopic mechanism 73.

[0056] Further, referring to Figure 2 and Figure 3 , the rotary track 711 further comprises a vertical track segment and an arc-shaped track segment, two ends of the arc-shaped track segment are connected with two ends of the vertical track segment to form an arc-shaped track;

[0057] Referring to Figure 4 , the rotary telescopic mechanism 73 is a central hollow disc-shaped structure, a plurality of sliding blocks 731 and a plurality of blade telescopic tracks 732 are arranged on the disc-shaped structure, and the blade telescopic tracks 732 are distributed radially around the central hollow;

[0058] Referring to Figure 5 , the telescopic blade 74 is a central hollow disc-shaped structure surrounded by a plurality of fan-shaped blades, a radial sliding rail is arranged on each fan-shaped blade, and the sliding blocks 731 on the rotary telescopic mechanism 73 freely slide along the radial sliding rails 741; preferably, the telescopic blade 74 is composed of six fan-shaped blades.

[0059] The lifting telescopic scraper unit 7 has a first state in which the connecting rod 20 slides up and down along the vertical track section when the lifting motor 15 drives the lifting shaft 17 to move up and down, thereby driving the rotating telescopic mechanism 73 and the telescopic scraper 74 to move up and down; and a second state in which the connecting rod 20 slides along the arc-shaped track section when the lifting motor 15 drives the lifting shaft 17 to move up and down, thereby driving the shaft sleeve 71, the linear slide rail 72 and the rotating telescopic mechanism 73 to rotate simultaneously, driving the slider 731 on the rotating telescopic mechanism 73 to slide along the radial slide rail, and driving the telescopic scraper 74 to move up and down to realize the opening and closing of the telescopic scraper 74; wherein the primary solid ice crystals and / or secondary solid ice crystals adhering to the inner wall of the rotating drum are scraped off by opening the telescopic scraper 74.

[0060] wherein the reference Figure 1 The device further comprises an electric push rod 19 installed on the outer wall of the spin finishing area 2, the electric push rod 19 is connected with the movable baffle 18, a hinge and a spring are arranged at the connection between the movable baffle 18 and the outer wall of the spin finishing area 2, and the opening and closing of the movable baffle 18 are controlled by the electric push rod 19; specifically, the movable baffle 18 is pulled down by the pushing force of the electric push rod 19, and under the joint action of the hinge and the spring, the movable baffle 18 is opened, and the movable baffle 18 is pushed back to the original position in the opposite direction by the electric push rod 19; wherein the movable baffle 18 is arranged as a plane or a curved surface.

[0061] The embodiment of the present application also provides a working process of the sewage liquid concentration and solid desalination separation device according to any one of the above embodiments, which comprises the following steps:

[0062] Primary spin centrifugation: the ice crystal mixture generated by the low-temperature equipment is sent into the first rotating drum 5 through the feeding port 8, the ordinary motor 14 drives the rotating shaft 16 and the first rotating drum 5 to perform primary centrifugal spinning at a rotating speed of 800-1400 r / min, the concentrated liquid generated in the process is discharged through the primary spin concentrated liquid outlet 9, the primary solid ice crystals adhere to the inner wall of the first rotating drum 5, and the primary solid ice crystals are scraped off from the drum wall by the lifting telescopic scraper unit 7 and enter the spin finishing area 2 under the action of centrifugal inertia;

[0063] Secondary spin centrifugation: the low-temperature raw water (i.e. wastewater without low-temperature freezing) enters the spin finishing area 2 tangentially from the finishing area nozzle 10, the primary solid ice crystals in the spin finishing area 2 rotate at a speed of 1-5 m / s (to obtain secondary ice crystal mixture), the movable baffle 18 of the spin finishing area 2 is opened by the electric push rod 19, the secondary ice crystal mixture enters the lower barrel 3, and the secondary spin separation is performed under the driving of the ordinary motor 14, the scraped secondary solid ice crystals enter the spin storage area 4, and the liquid generated in the separation is discharged from the secondary spin liquid outlet 11. The solid ice crystals in the spin storage area 4 are discharged from the solid discharge port 13 under the flushing of the low-temperature fresh water (the liquid obtained by melting the previous solid ice crystals).

[0064] In addition, the application also compares the water quality indexes of the water inlet of the device and the solid ice crystals obtained after separation, and the statistics are as follows:

[0065] Table 1 Water quality indexes before and after separation

[0066]

[0067] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not contradict, they should be considered as the scope of the description.

[0068] The above-described embodiments only express several implementation manners of the application, the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the application, and these belong to the protection scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.

Claims

1. A wastewater liquid concentration and solid desalination separation device, characterized in that, include: A primary spin-drying and finishing unit includes an upper barrel and a spin-drying and finishing zone arranged from top to bottom. The upper barrel is provided with a feed inlet and a primary spin-drying concentrate outlet. The upper barrel is used to centrifuge the ice crystal mixture generated by the low-temperature equipment. The resulting primary solid ice crystals are scraped off to the spin-drying and finishing zone and generate a secondary ice crystal mixture. The resulting spin-drying concentrate is discharged through the primary spin-drying concentrate outlet. A secondary spin-drying and collection unit is located below the primary spin-drying and sorting unit. The secondary ice crystal mixture is controlled to enter through a movable baffle. The unit includes a lower tank and a spin-drying collection area arranged from top to bottom. The lower tank is provided with a secondary spin-drying liquid outlet. The lower tank is used to centrifuge the secondary ice crystal mixture. The resulting secondary solid ice crystals are scraped off to the spin-drying collection area, and the resulting spin-drying liquid is discharged through the secondary spin-drying liquid outlet. The power unit includes a regular motor and a lifting motor. The output shaft of the regular motor is connected to the rotating shaft of the primary spin-drying and sorting unit and the secondary spin-drying and storage unit. The output shaft of the lifting motor is connected to the lifting and telescopic scraper unit disposed in the upper and lower barrels. The control unit is connected to the ordinary motor and the lifting motor. By sending control commands to the ordinary motor and the lifting motor respectively, the ordinary motor drives the rotating drum inside the upper and lower barrels to rotate, and the lifting motor drives the lifting telescopic scraper unit to open or retract. The upper end of the rotating shaft is provided with a vertical strip-shaped through hole, and the lifting shaft is inserted into the vertical strip-shaped through hole; wherein the lifting shaft includes a non-rotating shaft section and a rotating shaft section arranged from top to bottom, which are fixed by bearings, and the non-rotating shaft section is connected to the output shaft of the lifting motor; The lifting and telescopic scraper unit includes: a bushing, a linear slide rail, a rotary telescopic mechanism, and a telescopic scraper; The bushing is located outside the rotating shaft and has a rotating track and a vertical through hole. The vertical through hole corresponds to the rotating track. A radially arranged connecting rod passes through the rotating shaft section of the lifting shaft. Both ends of the connecting rod extend outward through the vertical through hole and the rotating track until they reach the outside of the bushing. The connecting rod is confined within the rotating track and slides freely. The connecting rod is connected to the rotating telescopic mechanism via a connecting rod. The linear slide rail is parallel to the bushing and connected to the outer wall of the bushing. The linear slide rail can rotate with the rotation of the bushing. The lower end of the linear slide rail is connected to the rotating telescopic mechanism via a linear bearing.

2. The wastewater liquid concentration and solid desalination separation device according to claim 1, characterized in that, A first rotating drum is installed inside the upper barrel, and a gap is provided between the upper barrel and the first rotating drum. The outlet of the concentrated liquid for primary spin drying is located at the lower end of the upper barrel and is connected to the gap. The first rotating drum is provided with multiple through holes. The ice crystal mixture generated by the low temperature equipment is fed into the first rotating drum through the feed port located at the upper end of the upper drum body for centrifugation, so that the resulting primary solid ice crystals adhere to the inner wall of the first rotating drum. The resulting spin-dried concentrate flows out from the through holes and is then discharged through the primary spin-dried concentrate outlet.

3. The wastewater liquid concentration and solid desalination separation device according to claim 1, characterized in that, The spin-drying and finishing zone is also equipped with finishing zone nozzles, through which uncooled frozen wastewater is sent into the spin-drying and finishing zone to mix with the primary solid ice crystals to generate a secondary ice crystal mixture.

4. The wastewater liquid concentration and solid desalination separation device according to claim 1, characterized in that, A second rotating drum is installed inside the lower barrel, and a gap is provided between the lower barrel and the second rotating drum. The secondary spin-drying liquid outlet is located at the lower end of the lower barrel and is connected to the gap. The second rotating drum is provided with multiple through holes. By opening the movable baffle, the secondary ice crystal mixture enters the second rotating drum for centrifugation, causing the resulting secondary solid ice crystals to adhere to the inner wall of the second rotating drum. The resulting spin-dry liquid flows out from the through holes and is then discharged through the secondary spin-dry liquid outlet.

5. The wastewater liquid concentration and solid desalination separation device according to claim 1, characterized in that, The spin-drying and storage area is also equipped with a storage area nozzle and a solid discharge port. Low-temperature fresh water is sent into the spin-drying and storage area through the storage area nozzle to flush away the secondary solid ice crystals and discharge them from the solid discharge port.

6. The wastewater liquid concentration and solid desalination separation device according to claim 1, characterized in that, The rotating shaft runs from top to bottom through the center of the entire wastewater liquid concentration and solid desalination separation device. The output shaft of the ordinary motor is connected to the lower end of the rotating shaft. By starting the ordinary motor, the rotating shaft is driven to rotate, which in turn drives the rotating drums in the upper and lower tanks to rotate.

7. The wastewater liquid concentration and solid desalination separation device according to claim 1, characterized in that, The rotary telescopic mechanism is connected to the lifting shaft via a gripper. The rotary telescopic mechanism is mounted on the bushing and the linear slide rail, and can drive the lifting shaft to move up and down by starting the lifting motor, thereby driving the rotary telescopic mechanism to move up and down along the setting direction of the bushing and the linear slide rail. The telescopic scraper is located below the rotary telescopic mechanism and is slidably connected to the rotary telescopic mechanism.

8. The wastewater liquid concentration and solid desalination separation device according to claim 1, characterized in that, The rotating track further includes: a vertical track segment and an arc track segment, wherein the two ends of the arc track are connected to the two ends of the vertical track segment to form the arc track; The rotary telescopic mechanism is a centrally hollowed-out disc-shaped structure. Several sliders and several scraper telescopic tracks are provided on the disc-shaped structure. The scraper telescopic tracks are distributed radially with the central hollow as the center. The telescopic scraper is a centrally hollowed-out disc-shaped structure formed by several fan-shaped scrapers. Each fan-shaped scraper is provided with a radial slide rail, and the slider on the rotary telescopic mechanism slides freely along the radial slide rail. The lifting and telescopic scraper unit has a first state where, when the lifting motor is started and the lifting shaft is driven to move up and down, the connecting rod slides up and down along the vertical track section, thereby driving the rotary telescopic mechanism and the telescopic scraper to move up and down; and a second state where, when the lifting motor is started and the lifting shaft is driven to move up and down, the connecting rod slides along the arc-shaped track section, causing the bushing, linear slide rail and rotary telescopic mechanism to rotate simultaneously, causing the slider on the rotary telescopic mechanism to slide along the radial slide rail, pushing the telescopic scraper to move up and down, thereby realizing the opening and closing of the telescopic scraper; wherein opening the telescopic scraper scrapes off the primary and / or secondary solid ice crystals adhering to the inner wall of the rotating drum.

9. The wastewater liquid concentration and solid desalination separation device according to claim 1, characterized in that, It also includes an electric push rod installed on the outer wall of the spin-drying and finishing area, the electric push rod being connected to the movable baffle, and the opening and closing of the movable baffle being controlled by the electric push rod; wherein the movable baffle is set as a plane or a curved surface.

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