High-salinity wastewater treatment device

Abstract

The invention discloses a high-salinity wastewater treatment device which is characterized in that a centrifugal tube is a hollow tube, the centrifugal tube is rotationally connected to a box body and is driven by a motor to rotate, a plurality of liquid outlet holes are formed in the outer wall surface of the centrifugal tube, and water absorption cotton wraps the outer wall surface of the centrifugal tube and is arranged on the inner wall of the box body. According to the invention, the water-absorbing cotton with PVA as the substrate is adopted, a PVA molecular chain contains a large number of hydroxyl groups and hydrogen bonds, and the PVA molecular chain can be crosslinked with a natural polymer material to form a compact network structure, so that the mechanical property of the composite material is enhanced. The high-salinity wastewater porous water absorbing material and equipment thereof are designed through PVA, water molecules can be segmented, energy consumption can be greatly reduced, and therefore certain application prospects are shown.

Description

Technical Field

[0001] The invention relates to a high-salt wastewater treatment device. Background Art

[0002] High-salt wastewater refers to wastewater with a total salt content of 1% or more. There are many ways to produce it, especially in the fine chemical industry, where the amount of high-salt wastewater is increasing. It is difficult to treat high-salt wastewater, especially the evaporation mother liquor concentrated by membrane method. The evaporation and crystallization method is not only energy-intensive and prone to corrosion of equipment, but also the waste salt at the back end is treated as hazardous waste. In view of the fact that traditional evaporation crystallization and cooling crystallization cannot meet the large-scale demand for high-salt wastewater treatment, falling film evaporators and rising film evaporators are used, but in long-term industrial practice, their respective shortcomings are also exposed. Both processes have the problem of too short evaporation time, resulting in too low a yield, and are not suitable for small and medium-sized factory operations. They have high energy consumption, high cost, bulky equipment, and are difficult to clean and maintain. In view of this, the present invention provides a high-salt wastewater treatment device. Summary of the invention

[0003] The present invention provides a high-salt wastewater treatment device in order to solve the problems existing in the above-mentioned prior art.

[0004] The technical solutions adopted in the present invention are: A high-salt wastewater treatment device comprises a casing, a centrifuge tube, a motor and a water-absorbing sponge with PVA as the base. The centrifuge tube is a hollow tube, which is rotatably connected to the casing and driven to rotate by the motor. A plurality of liquid outlet holes are arranged on the outer wall surface of the centrifuge tube. The water-absorbing sponge is wrapped on the outer wall surface of the centrifuge tube and arranged on the inner wall of the casing.

[0005] Furthermore, the centrifuge tube is connected to the motor and the box body by a detachable assembly structure.

[0006] Furthermore, the detachable structural assembly structure between the centrifuge tube and the box body is: a telescopic tube unit is fixed on the box body, and the telescopic tube unit includes a fixed sleeve, a telescopic sleeve and a rotating sleeve, which are all hollow structures and interconnected, the fixed sleeve is fixedly connected to the box body, the telescopic sleeve is elastically supported in the fixed sleeve, and the position of the telescopic sleeve in the axial direction of the fixed sleeve is adjustable, the rotating sleeve is rotatably connected in the telescopic sleeve, a spline groove is provided on the inner hole wall of the rotating sleeve, and a spline portion adapted to the spline groove is provided on the outer wall of the corresponding end of the centrifuge tube.

[0007] Furthermore, columnar protrusions are provided on the axial direction of the end faces of both sides of the telescopic sleeve, and the protrusions on both sides extend into the holes in the axial direction of the fixed sleeve and the rotating sleeve respectively. A spring is sleeved on the corresponding side protrusions, and one end of the spring abuts against the fixed sleeve, and the other end abuts against the telescopic sleeve.

[0008] Furthermore, a guide groove is provided on the outer wall of the telescopic sleeve, and a bolt is threadedly connected to the fixed sleeve, and the end of the bolt extends into the guide groove.

[0009] Furthermore, a pipe joint is plugged into the fixing sleeve.

[0010] Furthermore, the detachable structural assembly structure between the centrifuge tube and the box body is as follows: a spline sleeve is fixed on the motor shaft of the motor, and a spline portion adapted to the spline sleeve is provided at the corresponding end of the centrifuge tube.

[0011] Furthermore, the box body is a rectangular box body structure with openings at both upper and lower ends, a cover plate is provided at the upper end of the box body, and a detachable liquid collecting tank is provided at the lower end of the box body.

[0012] Furthermore, the liquid collecting trough is a rectangular trough, and step surfaces are provided around the inner cavity wall of the box body. The liquid collecting trough is inserted into the box body, and the step surfaces of the inner cavity wall of the box body are supported on the upper eaves of the liquid collecting trough.

[0013] Furthermore, an air duct is provided on the side wall of the box, the air duct is inclined downward, and a wind cover is provided on the outer wall of the box. A right-angle groove is provided in the wind cover. The horizontal groove of the right-angle groove is connected to the upper port of the air duct, and the vertical groove of the right-angle groove introduces dry air.

[0014] The present invention has the following beneficial effects: The present invention uses PVA as the base of water-absorbing sponge. The PVA molecular chain contains a large number of hydroxyl groups and hydrogen bonds, which can be cross-linked with natural polymer materials to form a dense network structure, thereby enhancing the mechanical properties of the composite material. The porous water-absorbing material (water-absorbing sponge) and its equipment (the device of the present invention) designed by PVA for high-salt wastewater can not only split water molecules, but also greatly reduce energy consumption, thus showing a certain application prospect.

[0015] The device of the present invention is simpler to operate, suitable for the production needs of small and medium-sized enterprises, extremely simple to maintain, low energy consumption, and lower cost. The sponge can also continuously absorb high-salt wastewater and either treat it as hazardous waste or utilize it as a resource, thereby greatly reducing the cost of high-salt wastewater treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of the present invention.

[0017] Figure 2 This is a structural diagram of the present invention.

[0018] Figure 3 This is a structural diagram of the telescopic tube unit.

[0019] Figure 4 A cross-sectional view of the telescopic tube unit.

[0020] Figure 5This is the structural diagram of the box.

[0021] Figure 6 This is a structural diagram of the liquid collecting tank.

[0022] Figure 7 This is a structural diagram of the air duct set on the box. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] like Figure 1 and Figure 2 The present invention discloses a high-salt wastewater treatment device, comprising a housing 1, a centrifuge tube 2, a motor 4 and a water-absorbing sponge 3 with PVA as a base, wherein the centrifuge tube 2 is a hollow tube, which is rotatably connected to the housing 1 and driven to rotate by the motor 4, and a plurality of liquid outlet holes (mesh structure) are arranged on the outer wall surface of the centrifuge tube 2, and the water-absorbing sponge 3 is wrapped on the outer wall surface of the centrifuge tube 2 and arranged on the inner wall of the housing 1.

[0025] The centrifuge tube 2 in the present invention is connected to the motor 4 and the box 1 by a detachable assembly structure. The detachable assembly structure can realize quick loading and unloading of the centrifuge tube 2.

[0026] like Figure 3 and Figure 4 The detachable structure assembly structure between the centrifuge tube 2 and the box body 1 is: The telescopic tube unit 5 is fixed on the housing 1, and the telescopic tube unit includes a fixed sleeve 51, a telescopic sleeve 52 and a rotating sleeve 53. The fixed sleeve 51, the telescopic sleeve 52 and the rotating sleeve 53 are coaxially arranged and are all hollow structures. The fixed sleeve 51 is fixedly connected to the housing 1, one end of the telescopic sleeve 52 is inserted into the fixed sleeve 51 and elastically supported on the fixed sleeve 51, and the other end extends out of the fixed sleeve 51. The position of the telescopic sleeve 52 in the axial direction of the fixed sleeve 51 is adjustable, and the rotating sleeve 53 is rotatably connected in the telescopic sleeve 52 through a bearing. A spline groove 531 is provided on the inner hole wall of the rotating sleeve 53, and a spline portion 21 adapted to the spline groove 531 is provided on the outer wall of the corresponding end of the centrifuge tube 2.

[0027] When the centrifuge tube 2 needs to be separated from the telescopic tube unit 5 , the telescopic sleeve 52 is axially moved to separate the rotating sleeve 53 from the spline portion 21 .

[0028] In order to ensure the assembly stability of the telescopic tube unit 5 structure, columnar protrusions 521 are provided on both side end surfaces of the telescopic sleeve 52 in the axial direction. Figure 4 The protrusions 521 on the left and right sides extend into the holes in the axial direction of the fixed sleeve 51 and the rotating sleeve 53 respectively. A spring 54 is sleeved on the protrusion 521 on the left side, and one end of the spring 54 abuts on the fixed sleeve 51, and the other end abuts on the telescopic sleeve 52.

[0029] In order to maintain the stability of the assembly of the spring 54, an inwardly recessed groove is provided on the corresponding contact surface of the spring 54, and the spring contacts the groove.

[0030] A guide groove 522 is provided on the outer wall of the telescopic sleeve 52, and a bolt 512 is threadedly connected to the fixed sleeve 51, and the end of the bolt 512 extends into the guide groove 522. The cooperation between the bolt 512 and the guide groove 522 not only serves to limit the axial displacement of the telescopic sleeve 52, but also serves as a guide. In order to further ensure the stability of the assembly of the fixed sleeve 51 and the telescopic sleeve 52, a plurality of convex ribs (such as Figure 3 (see the enlarged portion in the figure), a plurality of key grooves are provided on the inner wall of the fixing sleeve 51.

[0031] The rotating sleeve 53 is rotatably connected to the telescopic sleeve 52 via a bearing. To ensure sealing, sealing rings are provided between the fixed sleeve 51 and the telescopic sleeve 52 and between the telescopic sleeve 52 and the rotating sleeve 53 .

[0032] When in use, high-salt wastewater is input from the hole (hollow structure) in the axial direction of the telescopic tube unit 5. To facilitate the input of high-salt wastewater, a pipe joint 6 is inserted into the fixed sleeve 51, and a rubber ring 61 is sleeved on the pipe joint 6. The rubber ring 61 plays a sealing role on the one hand, and on the other hand, it can fix the pipe joint 6 in the fixed sleeve 51 through its own elastic force. The rubber ring 61 is inserted into the fixed sleeve 51 in an interference fit manner.

[0033] The detachable structure assembly structure between the centrifuge tube 2 and the box body 1 is as follows: a spline sleeve is fixed on the motor shaft of the motor 4, and a spline part adapted to the spline sleeve is provided at the corresponding end of the centrifuge tube 2. After the rotating sleeve 53 is separated from the spline part 21, the centrifuge tube 2 is axially moved so that the centrifuge tube 2 is separated from the motor shaft.

[0034] The centrifuge tube 2 is assembled with the motor shaft and the rotating sleeve 53 via a spline structure, so that the rotational force can be transmitted, and the centrifuge tube 2 rotates to generate centrifugal force.

[0035] like Figure 5 and Figure 6 The box body 1 is a rectangular box body structure with openings at both ends. A cover plate is provided at the upper end of the box body 1 , and a detachable liquid collecting tank 7 is provided at the lower end of the box body 1 .

[0036] The liquid collecting tank 7 is a rectangular tank, and the detachable assembly structure of the box body 1 and the liquid collecting tank 7 is: a step surface is provided around the inner cavity wall of the box body 1, the liquid collecting tank 7 is inserted into the box body 1, and the step surface of the inner cavity wall of the box body 1 is supported on the upper eaves of the liquid collecting tank 7.

[0037] like Figure 7In order to speed up the air drying process, an air duct 11 is provided on the side wall of the box body 1, and the air duct 11 is inclined downward. A wind cover 12 is provided on the outer wall of the box body 1, and a right-angle groove is provided in the wind cover 12. The horizontal groove of the right-angle groove is connected to the upper end of the air duct 11, and a fan is provided at the lower groove of the vertical groove of the right-angle groove for introducing dry air. The air duct 11 is arranged in an inclined downward manner, which ensures that the dry air is blown into the box body 1 while reducing the amount of liquid entering the air duct 11.

[0038] The absorbent sponge 3 and the wind cover 12 on the inner wall of the box body 1 are arranged on two parallel sides respectively. In order to facilitate taking the absorbent sponge 3 on the inner wall of the box body 1, a U-shaped plate 13 is inserted on the inner wall of the box body 1, and the absorbent sponge 3 is fixed on the inner side edge of the U-shaped plate 13.

[0039] The outer shell of the box body 1 is made of light-transmitting material, which is convenient for the water-absorbing material to perform photothermal action, and the liquid collecting tank 7 can be freely disassembled for easy collection and dumping.

[0040] When in use, the high-salt wastewater input from the pipe joint 6 enters the centrifuge tube 2 at a flow rate of 4.5-9m³ / s. The motor 4 drives the centrifuge tube 2 to rotate at a speed of 100-200r / min. The water in the centrifuge tube 2 will diffuse to the surface of the absorbent sponge 3 due to the centrifugal force, and the absorbent sponge 3 will quickly absorb the salt water. The fan quickly dries the absorbent sponge 3. When the absorbent sponge 3 is dried, crystal salt will precipitate on the surface. When the salt crystal layer reaches 0.5-2cm thick, remove it and scrape off the salt crystals with a scraper. A condenser can also be connected to the box 1 to condense the discharged water vapor and collect it in a collection bottle to prevent air pollution.

[0041] The preparation method of the water-absorbing sponge 3 based on PVA in the present invention is as follows: (1) Weigh an appropriate amount of 5%-10% polyvinyl alcohol into a beaker with a sponge, and heat to 90℃-95℃ under magnetic stirring for 3-4 hours until it is completely dissolved; (2) Add formaldehyde solution, n-pentane and concentrated sulfuric acid and stir to mix evenly, add the foaming agent solution to the polyvinyl alcohol solution after the reaction while stirring, and the foaming agent addition ratio is 5.6%-8% of the polyvinyl alcohol. The foaming agent is one or more of starch, urea and glucose; (3) After the stirring is completed, the mixture is placed in a blast drying oven at a temperature of 50°C to 60°C for foaming reaction, and the beaker is taken out and an additive is added for ultrasonic dispersion. The additive addition ratio is 0.5% to 3% of the amount of polyvinyl alcohol; the additive is one or more of iron oxide, copper oxide, aluminum oxide, bismuth oxide, graphene, and carbon nanotubes; (4) After pouring out the residual water in the beaker, take out the sponge, wash the sponge with distilled water, squeeze out the excess water, and put it back into the air drying oven for drying. After repeating the operation several times, a PVA porous composite sponge is made.

[0042] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A high-salt wastewater treatment device, characterized in that: The invention comprises a box body (1), a centrifuge tube (2), a motor (4) and a water-absorbing sponge (3) with PVA as a base, wherein the centrifuge tube (2) is a hollow tube, the centrifuge tube (2) is rotatably connected to the box body (1) and driven to rotate by the motor (4), a plurality of liquid outlet holes are provided on the outer wall surface of the centrifuge tube (2), and the water-absorbing sponge (3) is wrapped around the outer wall surface of the centrifuge tube (2) and is arranged on the inner wall of the box body (1).

2. The high-salt wastewater treatment device according to claim 1, characterized in that: The centrifuge tube (2) is connected to the motor (4) and the box (1) using a detachable assembly structure.

3. The high-salt wastewater treatment device according to claim 2, characterized in that: The detachable structural assembly structure between the centrifuge tube (2) and the housing (1) comprises: a telescopic tube unit (5) is fixed on the housing (1), the telescopic tube unit comprising a fixed sleeve (51), a telescopic sleeve (52) and a rotating sleeve (53) which are all hollow structures and interlinked with each other, the fixed sleeve (51) being fixedly connected to the housing (1), the telescopic sleeve (52) being elastically supported in the fixed sleeve (51), and the position of the telescopic sleeve (52) in the axial direction of the fixed sleeve (51) being adjustable, the rotating sleeve (53) being rotatably connected in the telescopic sleeve (52), a spline groove (531) being provided on the inner hole wall of the rotating sleeve (53), and a spline portion (21) adapted to the spline groove (531) being provided on the outer wall of the corresponding end of the centrifuge tube (2).

4. The high-salt wastewater treatment device according to claim 3, characterized in that: The telescopic sleeve (52) is provided with columnar protrusions (521) on both side end surfaces in the axial direction. The protrusions (521) on both sides extend into holes in the axial direction of the fixed sleeve (51) and the rotating sleeve (53), respectively. A spring (54) is sleeved on the corresponding side protrusions (521). One end of the spring (54) contacts the fixed sleeve (51), and the other end contacts the telescopic sleeve (52).

5. The high-salt wastewater treatment device according to claim 4, characterized in that: A guide groove (522) is provided on the outer wall of the telescopic sleeve (52), and a bolt (512) is threadedly connected to the fixed sleeve (51), with the end of the bolt (512) extending into the guide groove (522).

6. The high-salt wastewater treatment device according to claim 3, characterized in that: The fixing sleeve (51) is plugged with a pipe joint (6).

7. The high-salinity wastewater treatment device according to claim 2, characterized in that: The detachable structural assembly structure between the centrifuge tube (2) and the box body (1) is as follows: a spline sleeve is fixed on the motor shaft of the motor (4), and a spline portion adapted to the spline sleeve is provided at the corresponding end of the centrifuge tube (2).

8. The high-salinity wastewater treatment device according to claim 1, characterized in that: The box body (1) is a rectangular box body structure with openings at both upper and lower ends; a cover plate is provided at the upper end of the box body (1); and a detachable liquid collecting tank (7) is provided at the lower end of the box body (1).

9. The high-salinity wastewater treatment device according to claim 8, characterized in that: The liquid collecting trough (7) is a rectangular trough, and step surfaces are provided around the inner cavity wall of the box body (1). The liquid collecting trough (7) is inserted into the box body (1), and the step surfaces of the inner cavity wall of the box body (1) are supported on the upper eaves of the liquid collecting trough (7).

10. The high-salinity wastewater treatment device according to claim 1, characterized in that: An air duct (11) is provided on the side wall of the box body (1), the air duct (11) is inclined downward, and an air cover (12) is provided on the outer wall of the box body (1), a right-angle groove is provided in the air cover (12), the horizontal groove of the right-angle groove is connected to the upper end of the air duct (11), and the vertical groove of the right-angle groove introduces dry air.

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