Sewage liquid concentration and solid desalination separation device

Abstract

The invention provides a sewage liquid concentration and solid desalination separation device, belongs to the technical field of wastewater treatment, and can solve the problems that salt ions carried by solid ice crystals cannot be effectively separated and continuous production is difficult to realize in a traditional industrial salt-containing wastewater treatment mode. The device comprises a primary spin-drying and arranging unit, a secondary spin-drying and storing unit, a power unit and a control unit, wherein the primary spin-drying and finishing unit comprises an upper barrel body and a spin-drying and finishing area; the secondary spin-drying and storage unit is arranged below the primary spin-drying and arrangement unit and comprises a lower barrel body and a spin-drying and storage area; the power unit comprises a common motor and a lifting motor, and an output shaft of the common motor is connected with 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 is connected with a lifting telescopic scraper blade unit arranged in the upper and lower barrel bodies; the control unit is connected with the common motor and the lifting motor. The method can be applied to the aspect of industrial salt-containing wastewater treatment.

Description

Technical Field

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

[0002] When industrial saline wastewater is treated by low-temperature crystallization for volume reduction, solid crystals will be separated in the form of ice crystals. Then, through the traditional centrifugal drying method, the salt content of the solid ice crystals will be high, and the salt ions entrained by the ice crystals cannot be effectively separated. It is necessary to carry out solid ice crystal purification through re-crystallization. Moreover, during the ice crystal separation process, due to the low specific gravity of ice, the separation cannot be carried out using the specific gravity characteristic. There is a strong adhesion force between the ice crystal and the solid surface, and the lower the temperature, the stronger the adhesion force, making it impossible to achieve efficient continuous production, resulting in a decline in treatment efficiency and complex process operations.

[0003] Therefore, providing a wastewater treatment device that can effectively separate solid ice crystals from the salt ions they entrain and thereby improve the purity of solid ice crystals when treating industrial saline wastewater is the key to solving the above problems. Summary of the Invention

[0004] In view of the technical problems existing in the traditional industrial saline wastewater treatment method, such as high salt content in solid ice crystals, inability to effectively separate the salt ions entrained by the ice crystals, and thus difficulty in achieving continuous production, the present invention proposes a device for sewage liquid concentration and solid desalination separation. While realizing the separation of liquid and solid ice crystals, the device separates the liquid in the form of concentrated liquid, realizes the separation of the salt ions entrained by the solid ice crystals, improves the purity of the solid ice crystals, and achieves continuous production.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

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

[0007] A primary centrifugal drying and sorting unit, which includes an upper barrel body and a centrifugal drying and sorting area arranged from top to bottom. The upper barrel body is provided with a feed inlet and a primary centrifugal drying concentrated liquid outlet. The upper barrel body 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 centrifugal drying and sorting area to generate a secondary ice crystal mixture, and the obtained centrifugal drying concentrated liquid is discharged through the primary centrifugal drying concentrated liquid outlet;

[0008] A secondary centrifugal drying and storage unit, which is arranged below the primary centrifugal drying and sorting unit and controls the entry of the secondary ice crystal mixture through a movable baffle. It includes a lower barrel body and a centrifugal drying and storage area arranged from top to bottom. The lower barrel body is provided with a secondary centrifugal drying liquid outlet. The lower barrel body is used to centrifuge the secondary ice crystal mixture. The obtained secondary solid ice crystals are scraped off to the centrifugal drying and storage area, and the obtained centrifugal drying liquid is discharged through the secondary centrifugal drying liquid outlet;

[0009] A power unit, which includes a general motor and a lifting motor. The output shaft of the general motor is connected to a rotating shaft that penetrates through the primary dewatering and sorting unit and the secondary dewatering and storage unit; the output shaft of the lifting motor is connected to a lifting telescopic scraper unit disposed within the upper and lower barrel bodies.

[0010] A control unit, which is connected to the general motor and the lifting motor. By sending control instructions to the general motor and the lifting motor respectively, it controls the general motor to drive the rotating cylinders within the upper and lower barrel bodies to rotate, and controls the lifting motor to drive the lifting telescopic scraper unit to open or contract.

[0011] In one embodiment, a first rotating cylinder is installed within the upper barrel body, and there is a gap between the upper barrel body and the first rotating cylinder. The primary dewatering concentrated liquid outlet is disposed at the lower end of the upper barrel body and is in communication with the gap.

[0012] The first rotating cylinder is provided with a plurality of through holes. The ice crystal mixture generated by the low-temperature equipment is sent into the first rotating cylinder through the feed port disposed at the upper end of the upper barrel body for centrifugation, so that the obtained primary solid ice crystals adhere to the inner wall of the first rotating cylinder, and the obtained dewatered concentrated liquid flows out through the through holes and is then discharged through the primary dewatering concentrated liquid outlet.

[0013] In one embodiment, the dewatering and sorting area is further provided with a sorting area nozzle. The non-low-temperature frozen wastewater is sent into the dewatering and sorting area through the sorting area nozzle to be mixed with the primary solid ice crystals to generate a secondary ice crystal mixture.

[0014] In one embodiment, a second rotating cylinder is installed within the lower barrel body, and there is a gap between the lower barrel body and the second rotating cylinder. The secondary dewatering liquid outlet is disposed at the lower end of the lower barrel body and is in communication with the gap.

[0015] The second rotating cylinder is provided with a plurality of through holes. By opening the movable baffle, the secondary ice crystal mixture is sent into the second rotating cylinder for centrifugation, so that the obtained secondary solid ice crystals adhere to the inner wall of the second rotating cylinder, and the obtained dewatered liquid flows out through the through holes and is then discharged through the secondary dewatering liquid outlet.

[0016] In one embodiment, the dewatering and storage area is further provided with a storage area nozzle and a solid discharge port. Low-temperature fresh water is sent into the dewatering and storage area through the storage area nozzle to wash the secondary solid ice crystals and discharge them through the solid discharge port.

[0017] In one embodiment, the rotating shaft runs through 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 is connected to the lower end of the rotating shaft. By starting the ordinary motor, the rotating shaft is driven to rotate, and then the rotating cylinders in the upper and lower barrels are driven to rotate.

[0018] In one embodiment, a vertical strip-shaped through hole is provided at the upper end of the rotating shaft, 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, and the two are fixed by bearings, and the non-rotating shaft section is connected to the output shaft of the lifting motor.

[0019] In one embodiment, the lifting telescopic scraper unit includes: a shaft sleeve, a linear slide rail, a rotating telescopic mechanism, and a telescopic scraper;

[0020] Wherein the shaft sleeve is arranged outside the rotating shaft, and a rotating track and a vertical strip-shaped through hole are provided on the shaft sleeve. The vertical strip-shaped through hole is arranged corresponding to the rotating track. A radially arranged connecting rod penetrates through the inside of the rotating shaft section of the lifting shaft. Both ends of the connecting rod extend outwards through two vertical strip-shaped through holes and the rotating track until they extend outside the shaft sleeve. The connecting rod is limited to slide freely in the rotating track, and the connecting rod is connected to the rotating telescopic mechanism through a connecting rod; the linear slide rail is arranged parallel to the shaft sleeve and connected to the outer wall of the shaft sleeve. The linear slide rail can rotate as the shaft sleeve rotates, and the lower end of the linear slide rail is connected to the rotating telescopic mechanism through a linear bearing;

[0021] The rotating telescopic mechanism is connected to 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 setting direction of the shaft sleeve and the linear slide rail;

[0022] The telescopic scraper is arranged below the rotating telescopic mechanism and is slidably connected to the rotating telescopic mechanism.

[0023] In one embodiment, the rotating track further includes: a vertical track section and an arc track section. The two ends of the arc track are connected to the two ends of the vertical track section to form an arc track;

[0024] The rotating telescopic mechanism is a disc-shaped structure with a hollow center. A number of sliders and a number of scraper telescopic tracks are provided on the disc-shaped structure. The scraper telescopic tracks are radially distributed with the hollow center as the center;

[0025] The telescopic scraper is a disc-shaped structure with a hollow center formed by a number of sector-shaped scrapers. Each sector-shaped scraper is provided with a radial slide rail, and the slider on the rotary telescopic mechanism slides freely along the radial slide rail;

[0026] The lifting telescopic scraper unit has a first state in which when the lifting motor is started to drive the lifting shaft 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 has a second state in which when the lifting motor is started to drive the lifting shaft to move up and down, the connecting rod slides along the arc track section, driving the bushing, the linear slide rail and the rotary telescopic mechanism to rotate simultaneously, so that the slider on the rotary telescopic mechanism slides along the radial slide rail, pushing the telescopic scraper to perform a telescopic movement to realize the opening and contraction of the telescopic scraper; wherein the primary solid ice crystals and / or secondary solid ice crystals adhering to the inner wall of the rotating cylinder are scraped off by opening the telescopic scraper.

[0027] In an embodiment, the sewage liquid concentration and solid desalination separation device further includes an electric push rod installed on the outer wall of the drying and finishing area. The electric push rod is connected to the movable baffle, and the opening and closing of the movable baffle are controlled by the electric push rod; wherein, the movable baffle is set as a plane or a curved surface.

[0028] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0029] 1. The present invention provides a sewage liquid concentration and solid desalination separation device, which performs two centrifugations on the ice crystal mixture generated by the low-temperature equipment by setting a primary drying and finishing unit and a secondary drying and storage unit; wherein, concentrated liquid is obtained through the first centrifugal drying, and the obtained solid ice crystals enter the drying and finishing area. At an appropriate rotational speed (1-5 m / s), the salt ions entrained between the solid crystals are released, and through the secondary centrifugal drying, solid ice crystals with a lower salt content can be obtained;

[0030] 2. The present invention provides a sewage liquid concentration and solid desalination separation device, which realizes the telescoping of the scraper by driving the rotary telescopic mechanism to rotate through the lifting motor by setting a lifting telescopic scraper unit. When the scraper extends, it can reach the inner wall of the rotating cylinder to scrape off the ice crystals, and at the same time play the role of a wave wheel to distribute the material to the cylinder wall under the centrifugal force;

[0031] 3. The present invention provides a sewage liquid concentration and solid desalination separation device, which separates the liquid in the form of concentrated liquid while realizing the separation of liquid and solid ice crystals, realizes the separation of the salt ions entrained by the solid ice crystals, improves the purity of the solid ice crystals, and realizes continuous production;

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

[0033] Figure 1 It is a half-sectional view of the sewage liquid concentration and solid desalination separation device provided by the present invention;

[0034] Figure 2 It is a schematic connection diagram of the rotating shaft and the lifting and telescopic scraper unit provided by the present invention;

[0035] Figure 3 It is a perspective view of the connection between the rotating shaft and the lifting and telescopic scraper unit provided by the present invention;

[0036] Figure 4 It is a schematic structural diagram of the rotary telescopic mechanism provided by the present invention;

[0037] Figure 5 It is a schematic structural diagram of the telescopic scraper provided by the present invention.

[0038] In the above-mentioned drawings, the meanings of the respective reference numerals are as follows:

[0039] 1. Upper barrel body; 2. Drying and finishing area; 3. Lower barrel body; 4. Drying and storage area; 5. First rotating cylinder; 6. Second rotating cylinder; 7. Lifting and telescopic scraper unit; 8. Feed inlet; 9. Primary drying concentrated liquid outlet; 10. Nozzle in the finishing area; 11. Secondary drying liquid outlet; 12. Nozzle in the storage area; 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. Sleeve; 72. Linear slide rail; 73. Rotary telescopic mechanism; 74. Telescopic scraper; 75. Linear bearing; 76. Vertical strip-shaped through hole; 77. Connecting rod; 711. Rotary track; 73l. Slide block; 732. Scraper telescopic track; 741. Radial slide rail;

[0041] 171. Non-rotating shaft section; 172. Rotating shaft section; 173. Bearing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described and explained below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided by the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0043] Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, the present invention can also be applied to other similar scenarios based on these drawings. In addition, it can also be understood that although the efforts made in such a development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present invention, some design, manufacturing or production changes based on the technical content disclosed in the present invention are only conventional technical means and should not be understood as the content disclosed in the present invention being insufficient.

[0044] In the present invention, the mention of "embodiment" means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present invention. The appearance of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those of ordinary skill in the art explicitly and implicitly understand that the embodiments described in the present invention can be combined with other embodiments without conflict.

[0045] Unless otherwise defined, the technical terms or scientific terms involved in the present invention should be the ordinary meanings understood by those with ordinary skills in the technical field to which the present invention belongs. The words such as "a", "an", "one", "the" and the like involved in the present invention do not represent a quantity limitation and can represent a singular or plural number. The terms "including", "comprising", "having" and any variations thereof involved in the present invention 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 may further include unlisted steps or units, or may further include other steps or units inherent to these processes, methods, products or devices. The terms "connected", "coupled" and the like involved in the present invention are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "plurality" involved in the present invention refers to two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the front and back associated objects. The terms "first", "second" and the like involved in the present invention are only used to distinguish similar objects and do not represent a specific order for the objects.

[0046] An embodiment of the present invention provides a sewage liquid concentration and solid desalination separation device. Figures 1-5The semi-sectional view, the connection schematic diagram of the rotating shaft and the lifting and telescopic scraper unit, the perspective view of the connection between the rotating shaft and the lifting and telescopic scraper unit, the structural schematic diagram of the rotating and telescopic mechanism, and the structural schematic diagram of the telescopic scraper of the sewage liquid concentration and solid desalination separation device according to the embodiment of the present invention. Refer to Figures 1-5 As shown, the sewage liquid concentration and solid desalination separation device at least includes: a primary dewatering and sorting unit, a secondary dewatering and storage unit, a power unit, and a control unit; wherein, the primary dewatering and sorting unit includes an upper barrel body 1 and a dewatering and sorting area 2 arranged from top to bottom. The upper barrel body 1 is provided with a feed port 8 and a primary dewatering concentrated liquid outlet 9. The upper barrel body 1 is used to centrifuge the ice crystal mixture generated by the low-temperature equipment. The obtained primary solid ice crystals are scraped off to the dewatering and sorting area 2 to generate a secondary ice crystal mixture. The obtained dewatering concentrated liquid is discharged through the primary dewatering concentrated liquid outlet 9; the secondary dewatering and storage unit is arranged below the primary dewatering and sorting unit and controls the entry of the secondary ice crystal mixture through a movable baffle 18. It includes a lower barrel body 3 and a dewatering and storage area 4 arranged from top to bottom. The lower barrel body 3 is provided with a secondary dewatering liquid outlet 11. The lower barrel body 3 is used to centrifuge the secondary ice crystal mixture. The obtained secondary solid ice crystals are scraped off to the dewatering and storage area 4. The obtained dewatering liquid is discharged through the secondary dewatering 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 a rotating shaft 16 that penetrates through the primary dewatering and sorting unit and the secondary dewatering and storage unit; the output shaft of the lifting motor 15 is connected to a lifting and telescopic scraper unit 7 arranged in the upper barrel body 1 and the lower barrel body 3; the control unit is connected to the general motor 14 and the lifting motor 15, and by sending control commands to the general motor 14 and the lifting motor 15 respectively, controls the general motor 14 to drive the rotating cylinders in the upper barrel body 1 and the lower barrel body 3 to rotate, and controls the lifting motor 15 to drive the lifting and telescopic scraper unit 7 to open or contract.

[0047] Among them, refer to Figure 1 , a first rotating cylinder 5 is installed in the upper barrel body 1, and there is a gap between the upper barrel body 1 and the first rotating cylinder 5. The primary dewatering concentrated liquid outlet 9 is arranged at the lower end of the upper barrel body and communicates with the gap; a plurality of through holes are provided on the first rotating cylinder 5. The ice crystal mixture generated by the low-temperature equipment is sent into the first rotating cylinder 5 through the feed port 8 arranged at the upper end of the upper barrel body 1 for centrifugation, so that the obtained primary solid ice crystals adhere to the inner wall of the first rotating cylinder 5. The obtained dewatering concentrated liquid flows out from the through holes and is then discharged through the primary dewatering concentrated liquid outlet 9. Preferably, two primary dewatering concentrated liquid outlets 9 are respectively arranged on both sides of the upper barrel body 1 to facilitate the rapid discharge of the dewatering concentrated liquid.

[0048] Furthermore, refer to Figure 1 , the dewatering and sorting area 2 is also provided with a sorting area nozzle 10. The non-low-temperature frozen wastewater is tangentially sent into the dewatering and sorting area 2 through the sorting area nozzle 10 to be mixed with the primary solid ice crystals to generate a secondary ice crystal mixture.

[0049] Among them, refer to Figure 1 , a second rotating cylinder 6 is installed in the lower barrel body 3, and there is a gap between the lower barrel body 3 and the second rotating cylinder 6. The secondary dewatering liquid outlet 11 is arranged at the lower end of the lower barrel body 3 and is communicated with the gap; a plurality of through holes are provided on the second rotating cylinder 6. By opening the movable baffle 18, the secondary ice crystal mixture enters the second rotating cylinder 6 for centrifugation, so that the obtained secondary solid ice crystals adhere to the inner wall of the second rotating cylinder 6, and the dewatered liquid flows out from the through holes and is then discharged through the secondary dewatering liquid outlet 11. Preferably, two secondary dewatering liquid outlets 11 are respectively arranged on both sides of the lower barrel body 3 to facilitate the rapid discharge of the dewatered liquid.

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

[0051] Among them, refer to Figure 1 , the rotating shaft 16 penetrates through 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 then the rotating cylinders in the upper barrel body 1 and the lower barrel body 3 are driven to rotate.

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

[0053] Next, refer to Figures 2-3 , the structure and working process of the lifting and telescopic scraper unit 7 in the device will be described in detail:

[0054] The lifting and telescopic scraper unit 7 includes: a bushing 71, a linear slide rail 72, a rotary telescopic mechanism 73, and a telescopic scraper 74; wherein, the bushing 71 is arranged outside the rotating shaft 16, and a rotary track 711 and a vertical strip-shaped through hole 76 are provided on the bushing 71. The vertical strip-shaped through hole 76 is arranged corresponding to the rotary track 711. A radially arranged connecting rod 20 penetrates through the inside of the rotating shaft section 172 of the lifting shaft 17. Both ends of the connecting rod 20 extend outward through the vertical strip-shaped through hole 76 and the rotary track 711 until they extend outside the bushing 71. The connecting rod 20 is limited to freely slide in the rotary track 711 and the vertical strip-shaped through hole 76. The connecting rod 20 is connected to the rotary telescopic mechanism 73 through a connecting rod 77; the linear slide rail 72 is arranged parallel to the bushing 71 and connected to the outer wall of the bushing 71. The linear slide rail 72 can rotate as the bushing 71 rotates. The lower end of the linear slide rail 72 passes through a linear bearing 75 and is connected to the rotary telescopic mechanism 73. The rotary telescopic mechanism 73 and the telescopic scraper 74 perform a lifting motion on the linear slide rail 72 through the linear bearing 75.

[0055] Further, the rotary telescopic mechanism 73 and the lifting shaft 17 are connected through a gripper (not shown in the figure). The rotary telescopic mechanism 73 is arranged on the bushing 71 and the linear slide rail 72, and can drive the lifting shaft 17 to perform a lifting motion by starting the lifting motor 15, thereby driving the rotary telescopic mechanism 73 to perform a lifting motion along the arrangement direction of the bushing 71 and the linear slide rail 72; the telescopic scraper 74 is arranged below the rotary telescopic mechanism 73 and is slidably connected to the rotary telescopic mechanism 73.

[0056] Furthermore, referring to Figure 2 and Figure 3 , the rotary track 711 further includes: a vertical track section and an arc track section. The two ends of the arc track are connected to the two ends of the vertical track section to form an arc track;

[0057] Referring to Figure 4 , the rotary telescopic mechanism 73 is a disk-shaped structure with a central hollow. A number of sliders 731 and a number of scraper telescopic tracks 732 are provided on the disk-shaped structure. The scraper telescopic tracks 732 are radially distributed with the central hollow as the center;

[0058] Referring to Figure 5 , the telescopic scraper 74 is a disk-shaped structure with a central hollow surrounded by a number of sector-shaped scrapers. Each sector-shaped scraper is provided with a radial slide rail. The slider 731 on the rotary telescopic mechanism 73 freely slides along the radial slide rail 741; preferably, the telescopic scraper 74 is formed by splicing six sector-shaped scrapers.

[0059] The lifting and telescopic scraper unit 7 has a first state in which when the lifting motor 15 is started to drive the lifting shaft 17 to move up and down, the connecting rod 20 slides up and down along the vertical track section, and then drives the rotary telescopic mechanism 73 and the telescopic scraper 74 to move up and down; and when the lifting motor 15 is started to drive the lifting shaft 17 to move up and down, the connecting rod 20 slides along the arc track section, drives the bushing 71, the linear slide rail 72 and the rotary telescopic mechanism 73 to rotate simultaneously, so that the slider 731 on the rotary telescopic mechanism 73 slides along the radial slide rail, and pushes the telescopic scraper 74 to perform a telescopic movement, so as to realize the second state in which the telescopic scraper 74 opens and contracts; wherein the primary solid ice crystals and / or secondary solid ice crystals adhered to the inner wall of the rotating cylinder are scraped off by opening the telescopic scraper 74.

[0060] Among them, referring to Figure 1 , the device further includes an electric push rod 19 installed on the outer wall of the drying and finishing area 2. The electric push rod 19 is connected to the movable baffle 18. Hinges and springs are provided at the connection between the movable baffle 18 and the outer wall of the drying and finishing area 2. 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 thrust of the electric push rod 19, and under the combined action of the hinge and the spring, the movable baffle 18 is opened, and the electric push rod 19 pushes the movable baffle 18 in the opposite direction to restore its original position; wherein the movable baffle 18 is set to be a plane or a curved surface.

[0061] The embodiment of the present invention also provides a working process of a sewage liquid concentration and solid desalination separation device using any one of the above embodiments, including the following steps:

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

[0063] Secondary centrifugal drying: The low-temperature raw water (i.e., the wastewater that has not been cryogenically frozen) tangentially enters the drying and finishing area 2 from the finishing area nozzle 10. After the primary solid ice crystals in the drying and finishing area 2 rotate at a speed of 1-5 m / s (to obtain a secondary ice crystal mixture), the electric push rod 19 is used to open the movable baffle 18 in the drying and finishing area 2. The secondary ice crystal mixture enters the lower barrel body 3 and is subjected to secondary centrifugal separation under the drive of the ordinary motor 14. The scraped secondary solid ice crystals enter the drying and storage area 4, and the separated liquid is discharged from the secondary centrifugal liquid outlet 11. The solid ice crystals in the drying and storage area 4 are washed out from the solid discharge port 13 by the low-temperature fresh water (the liquid melted from the previous solid ice crystals).

[0064] In addition, the present invention also compared the water quality indexes of the water inlet of the device and the water quality indexes of the solid ice crystals obtained after separation, and the statistics are as follows in the table:

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

[0066]

[0067] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0068] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A sewage liquid concentration and solid desalination separation device, characterized in that, Comprising: A primary dewatering and sorting unit, which includes an upper barrel body and a dewatering and sorting area arranged from top to bottom. The upper barrel body is provided with a feed inlet and a primary dewatering concentrated liquid outlet. The upper barrel body is used to centrifuge the ice crystal mixture generated by the low-temperature equipment. The obtained primary solid ice crystals are scraped off to the dewatering and sorting area to generate a secondary ice crystal mixture. The obtained dewatering concentrated liquid is discharged through the primary dewatering concentrated liquid outlet. A secondary dewatering and storage unit, which is arranged below the primary dewatering and sorting unit and controls the entry of the secondary ice crystal mixture through a movable baffle. It includes a lower barrel body and a dewatering and storage area arranged from top to bottom. The lower barrel body is provided with a secondary dewatering liquid outlet. The lower barrel body is used to centrifuge the secondary ice crystal mixture. The obtained secondary solid ice crystals are scraped off to the dewatering and storage area. The obtained dewatering liquid is discharged through the secondary dewatering liquid outlet. A power unit, which includes an ordinary motor and a lifting motor. The output shaft of the ordinary motor is connected to a rotating shaft that penetrates through the primary dewatering and sorting unit and the secondary dewatering and storage unit. The output shaft of the lifting motor is connected to a lifting and telescopic scraper unit arranged in the upper and lower barrel bodies. A control unit, which is connected to the ordinary motor and the lifting motor. By sending control commands to the ordinary motor and the lifting motor respectively, it controls the ordinary motor to drive the rotating cylinders in the upper and lower barrel bodies to rotate, and controls the lifting motor to drive the lifting and telescopic scraper unit to open or contract.

2. The sewage liquid concentration and solid desalination separation device according to claim 1, wherein, A first rotating cylinder is installed in the upper barrel body, and there is a gap between the upper barrel body and the first rotating cylinder. The primary dewatering concentrated liquid outlet is arranged at the lower end of the upper barrel body and is communicated with the gap. The first rotating cylinder is provided with a plurality of through holes. The ice crystal mixture generated by the low-temperature equipment is sent into the first rotating cylinder through the feed inlet arranged at the upper end of the upper barrel body for centrifugation, so that the obtained primary solid ice crystals adhere to the inner wall of the first rotating cylinder. The obtained dewatering concentrated liquid flows out from the through holes and is then discharged through the primary dewatering concentrated liquid outlet.

3. A sewage liquid concentration and solid desalination separation device according to claim 1, characterized in that, The dewatering and sorting area is also provided with a sorting area nozzle. The non-low-temperature frozen wastewater is sent into the dewatering and sorting area through the sorting area nozzle to be mixed with the primary solid ice crystals to generate a secondary ice crystal mixture.

4. A sewage liquid concentration and solid desalination separation device according to claim 1, characterized in that, A second rotating cylinder is installed in the lower barrel body, and there is a gap between the lower barrel body and the second rotating cylinder. The secondary dewatering liquid outlet is arranged at the lower end of the lower barrel body and is communicated with the gap. The second rotating cylinder is provided with a plurality of through holes. By opening the movable baffle, the secondary ice crystal mixture enters the second rotating cylinder for centrifugation, so that the obtained secondary solid ice crystals adhere to the inner wall of the second rotating cylinder. The obtained dewatering liquid flows out from the through holes and is then discharged through the secondary dewatering liquid outlet.

5. A sewage liquid concentration and solid desalination separation device according to claim 1, characterized in that, The dewatering and storage area is also provided with a storage area nozzle and a solid discharge port. The low-temperature fresh water is sent into the dewatering and storage area through the storage area nozzle to wash the secondary solid ice crystals and discharge them from the solid discharge port.

6. The sewage liquid concentration and solid desalination separation device according to claim 1, characterized in that, The rotating shaft penetrates through 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 is connected to the lower end of the rotating shaft. By starting the ordinary motor, the rotating shaft is driven to rotate, and then the rotating cylinders in the upper and lower barrels are driven to rotate.

7. A sewage liquid concentration and solid desalination separation device according to claim 1, characterized in that, A vertical strip-shaped through hole is provided at the upper end of the rotating shaft, 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, and the two are fixed by bearings, and the non-rotating shaft section is connected to the output shaft of the lifting motor.

8. A sewage liquid concentration and solid desalination separation device according to claim 7, characterized in that, The lifting and telescopic scraper unit includes: a shaft sleeve, a linear slide rail, a rotating and telescopic mechanism, and a telescopic scraper; Among them, the shaft sleeve is arranged outside the rotating shaft, and a rotating track and a vertical strip-shaped through hole are provided on the shaft sleeve. The vertical strip-shaped through hole is arranged corresponding to the rotating track. A radially arranged connecting rod penetrates through the rotating shaft section of the lifting shaft. The two ends of the connecting rod extend outward through the vertical strip-shaped through hole and the rotating track until they extend outside the shaft sleeve. The connecting rod is limited to slide freely in the rotating track, and the connecting rod is connected to the rotating and telescopic mechanism through a connecting rod; the linear slide rail is arranged parallel to the shaft sleeve and connected to the outer wall of the shaft sleeve. The linear slide rail can rotate as the shaft sleeve rotates, and the lower end of the linear slide rail is connected to the rotating and telescopic mechanism through a linear bearing; The rotating and telescopic mechanism is connected to the lifting shaft through a gripper. The rotating and 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 and telescopic mechanism to move up and down along the setting direction of the shaft sleeve and the linear slide rail; The telescopic scraper is arranged below the rotating and telescopic mechanism and is slidably connected to the rotating and telescopic mechanism.

9. A sewage liquid concentration and solid desalination separation device according to claim 8, characterized in that, The rotating track further includes: a vertical track section and an arc track section. The two ends of the arc track are connected to the two ends of the vertical track section to form an arc track; The rotating and telescopic mechanism is a disk-shaped structure with a central hollow. A number of sliders and a number of scraper telescopic tracks are provided on the disk-shaped structure. The scraper telescopic tracks are radially distributed with the central hollow as the center; The telescopic scraper is a disk-shaped structure with a central hollow surrounded by a number of sector-shaped scrapers. A radial slide rail is provided on each sector-shaped scraper, and the sliders on the rotating and telescopic mechanism slide freely along the radial slide rail; When the lifting motor is started to drive the lifting shaft to move up and down, the lifting and telescopic scraper unit has a first state in which the connecting rod slides up and down along the vertical track section, and then drives the rotating and telescopic mechanism and the telescopic scraper to move up and down; and when the lifting motor is started to drive the lifting shaft to move up and down, the connecting rod slides along the arc track section, driving the shaft sleeve, the linear slide rail and the rotating and telescopic mechanism to rotate simultaneously, so that the sliders on the rotating and telescopic mechanism slide along the radial slide rail, pushing the telescopic scraper to perform a telescopic movement to achieve the second state of the telescopic scraper opening and contracting; wherein by opening the telescopic scraper, the primary solid ice crystals and / or secondary solid ice crystals adhered to the inner wall of the rotating cylinder are scraped off.

10. A sewage liquid concentration and solid desalination separation device according to claim 1, characterized in that, It further includes an electric push rod installed on the outer wall of the drying and finishing area, the electric push rod is connected to the movable baffle, and the opening and closing of the movable baffle are controlled by the electric push rod; wherein the movable baffle is set to be a plane or a curved surface.

Images