Fluorine removal equipment and process for fluorine-containing wastewater

Abstract

The present invention belongs to the technical field of wastewater defluorination, and specifically is a defluorination device and process for fluorine-containing wastewater, comprising a shell; the shell is composed of an upper shell and a lower shell; the upper shell and the lower shell are fixedly connected by a group of U-columns; a connecting rotating part is provided between the upper shell and the lower shell; a first ring tube is fixedly connected to the outer circular wall of the lower shell; a group of venturi tubes is fixedly connected to the top of the first ring tube, and the venturi tubes are inclined; a second ring tube is fixedly connected to the lower shell through a group of fixed columns, and the inside of the second ring tube is connected to a group of bifurcated tubes of the venturi tubes; the present invention realizes unpowered and efficient mixing of fluorine-containing wastewater and precipitant through a specific fluid guiding design, and also realizes cyclic efficient utilization of resin adsorption and improved reaction efficiency through structural design and control optimization of the defluorination equipment, thereby simplifying the fluorine-containing wastewater treatment process and equipment combination.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater defluorination, in particular to a defluorination device and process for fluorine-containing wastewater. Background Art

[0002] In the semiconductor industry, fluoride is an important pollutant, mainly from fluorine-containing chemicals used in etching and cleaning processes. Fluoride emissions can have serious impacts on the environment, especially on water bodies. Therefore, effective water pollution control facilities are essential to control and reduce fluoride ion emissions.

[0003] In the prior art, the methods for treating fluorine-containing wastewater mainly include: chemical precipitation, adsorption, electrocoagulation, ion exchange resin, reverse osmosis, etc.; achieving deep defluorination often requires a combination of several methods. Generally, a preliminary defluorination is performed by precipitation, etc., and then the wastewater is transferred to other equipment for deep defluorination. However, this process is time-consuming and requires multiple defluorination equipment, which cannot efficiently meet flexible defluorination requirements. At the same time, the existing deep defluorination equipment, through the rotation of the filter element, adsorbs the fluoride ions and then washes the adsorbent on its surface, but this process needs to be intermittently cyclically carried out, resulting in the inability to continuously treat the fluoride-containing wastewater, resulting in low efficiency, complex operation, and high cost in the treatment of fluoride-containing wastewater.

[0004] In view of the defects of the prior art, a solution is now proposed. Summary of the invention

[0005] In order to make up for the shortcomings of the existing technology, a combination of several methods is often required to achieve deep defluorination. Generally, a preliminary defluorination is carried out by precipitation method, and then the wastewater is transferred to other equipment for deep defluorination. However, this process is time-consuming and requires multiple defluorination equipment, which cannot efficiently meet flexible defluorination requirements. At the same time, the existing deep defluorination equipment adsorbs fluoride ions through the rotation of the filter element and then washes the adsorbent on its surface, but this process requires intermittent circulation, resulting in the inability to continuously treat fluoride-containing wastewater, resulting in low efficiency, complex operation, and high cost in the treatment of fluoride-containing wastewater.

[0006] The technical solution adopted by the present invention to solve its technical problem is: the defluorination equipment and process for fluorine-containing wastewater described in the present invention include a shell; the shell is composed of an upper shell and a lower shell, the upper shell and the lower shell are fixedly connected by a group of U-columns, and a connecting rotating member is provided between the upper shell and the lower shell; a first ring tube is fixedly connected to the outer circular wall of the lower shell, a group of venturi tubes are fixedly connected to the top of the first ring tube, and the venturi tubes are inclined, a second ring tube is fixedly connected to the lower shell by a group of fixing columns, and the inside of the second ring tube and the group of venturi tubes are connected. The fork tubes are connected; the first ring tube and the second ring tube are both provided with access pipes, and the bottom of the lower shell is provided with a wastewater discharge pipe; a support is fixedly connected to the top of the lower shell, and an ion column is provided on the top of the support, and the ion column is divided into a first column cavity and a second column cavity by an arc plate, and the top and bottom ends of the first column cavity and the second column cavity are respectively provided with an inner ring tube and an outer ring tube through a pair of connecting pipes, and the connecting pipes and the inner and outer ring tubes are all connected; a mixing uniformity component and a resin recycling component are provided in the shell, and a sediment collection component is provided at the bottom of the lower shell.

[0007] Preferably, the connecting rotating part includes a cross ring block, the bottom end of the upper shell body and the top end of the lower shell body are rotatably connected to the cross ring block through a square ring groove, an L ring block is fixedly connected to the outer circular wall of the lower shell body, and the top end of the venturi tube passes through the L ring block; a square ring groove is provided on the inner arc wall of the L ring block, and the outer end of the cross ring block is rotatably connected in the square ring groove, a group of oblique grooves are provided at the bottom end of one side of the cross ring block, and the oblique grooves are set in the same direction as the inclination direction of the venturi tube; a group of injection grooves are provided at the lower end of the cross ring block; and a flow control valve is provided on the venturi tube and its branch pipe.

[0008] Preferably, the mixing uniformity member includes a connecting column, a group of connecting columns are fixedly connected to the inner ring wall of the cross ring block, a rotating column is rotatably connected to the connecting column through a circular groove, the top and bottom ends of the inner wall of the shell are rotatably connected to the rotating ring through a square ring groove, and the two ends of the rotating column are rotatably connected to a pair of rotating rings respectively; a gear ring is fixedly connected to the inner ring wall of the upper shell, a group of the rotating columns are fixedly connected to gears, and the gears and the gear rings are meshed, and a group of the rotating columns are fixedly connected to guide plates.

[0009] Preferably, the resin recycling part includes an inner ring tube, the top and bottom of the shell are fixedly connected to the inner ring tube and the outer ring tube through a fixed block, the outer ring tube at the top of the ion column is provided with a liquid outlet pipe, and the liquid outlet pipe runs through the shell, and the outer ring tube at the bottom end of the ion column is connected to the wastewater discharge pipe through a third tube; a circulation pump is fixedly connected to the top of the upper shell, the inner ring tube at the bottom end of the ion column is connected to the water inlet end of the circulation pump through a first tube, and the water outlet end of the circulation pump is connected to the inner ring tube at the top of the ion column through a second tube, and a chemical tube is provided on the second tube, and electric valves are provided on the chemical tube, the connecting tube and the third tube.

[0010] Preferably, the sediment collecting member includes a bottom shell, the bottom shell is fixedly connected to the bottom edge of the lower shell through a bottom groove, the side wall of the bottom shell is slidably connected to a slide plate through a square groove, an electric push rod is fixedly connected to the bottom end of the lower shell, the output end of the electric push rod is fixedly connected to the side wall of the slide plate, and a threaded cover is provided at the bottom of the bottom shell.

[0011] Preferably, a group of driven plates are fixedly connected to the outer circular wall of the ion column, and an inner ring plate and an outer ring plate are rotatably connected between the inner arc walls of a pair of the inner ring tube and the outer ring tube through grooves, and the connecting tube, the liquid outlet tube and the third tube all pass through the inner ring plate and the outer ring plate, and the support and the ion column are rotatably connected.

[0012] Preferably, a group of the guide plates and the driven plates are arranged in a twisted shape, a circular groove is opened at the edge of the inner circular wall of the lower shell, and the circular groove is connected to the bottom groove, and the injection groove is arranged to have a smaller opening toward the inside of the shell and a larger opening toward the outside of the shell.

[0013] Preferably, the cross ring block, inner ring block, outer ring block, rotating column, gear and guide plate are all made of high-performance plastics; an outer shell is fixedly connected to the outer circular wall of the shell, and a pair of access pipes pass through the outer shell, and a heating unit is provided in the outer shell; aluminum silicate fiber is fixedly connected to the inner wall of the outer shell.

[0014] A defluorination process for fluorine-containing wastewater, which is applicable to the above-mentioned defluorination equipment for fluorine-containing wastewater, comprises the following steps:

[0015] S1: First, the upper shell and the lower shell are connected by connecting the rotating parts. The wastewater is ejected at high speed by multiple venturi tubes and acts on the oblique groove, driving the cross ring block to rotate. In addition, because the gear and the gear ring are meshed, the guide plate rotates while revolving around the ion column as the axis, thereby fully mixing the wastewater and the precipitant in the shell;

[0016] S2: Then, the electric valve on the connecting pipe connected to the first column chamber and the second column chamber is controlled to allow the wastewater to selectively enter the first column chamber or the second column chamber. At the same time, the other column chamber that does not perform fluorine removal on the wastewater uses an eluent to elute the fluoride ions on the resin inside it, so as to increase the service life of the resin and reduce its use cost;

[0017] S3: When a group of guide plates rotate along the axis and rotate themselves, the liquid flows and acts on the driven plate, thereby driving the ion column to rotate, increasing the contact position between the wastewater and the resin, and improving the defluorination efficiency.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The fluorine removal equipment and process for fluorine-containing wastewater described in the present invention connects the upper and lower shells through a connecting rotating member and plays a specific fluid guiding role. Wastewater is sprayed through an inclined venturi tube, and the precipitant in its bifurcated tube is automatically mixed during the process. The wastewater acts on the inclined groove to drive the cross ring block to rotate, thereby realizing the rotation of the guide plate driven by the rotating column. A group of guide plates rotate and revolve to complete the sufficient stirring and mixing of the wastewater and the precipitant in the shell, and the mixing efficiency of the wastewater and the precipitant is increased in a non-powered manner.

[0020] 2. The fluorine removal equipment and process for fluorine-containing wastewater described in the present invention introduces wastewater into the ion column through the wastewater discharge pipe, the third pipe and the outer ring pipe, and the arc plate separates the ion column into the first column cavity and the second column cavity, and the inner ring pipe and the outer ring pipe are each provided with a pair of connecting pipes and electric valves, so that when the resin in the first column cavity adsorbs fluorine ions to saturation, the electric valve on the connecting pipe at the lower end of the first column cavity can be closed to allow the wastewater to enter the connecting pipe at the lower end of the second column cavity, and then the fluorine ions on the resin in the first column cavity are eluted through the recycling unit, thereby completing the recycling of the first column cavity and the second column cavity, which can effectively remove fluorine without affecting the treatment of wastewater and increase the service life of the resin.

[0021] 3. The fluorine removal equipment and process for fluorine-containing wastewater described in the present invention rotates and revolves around a group of guide plates, and is connected to the ion column and the support through the arrangement of a driven plate, so that the guide plate can drive the ion column to rotate. After the wastewater enters the ion column, the rotation of the ion column can increase the contact area between the resin and the wastewater, thereby increasing the fluorine removal efficiency of the wastewater, while avoiding oversaturation of a single resin, increasing the service life of the resin, and facilitating the diffusion of the agent, thereby improving the efficiency and effect of flushing the resin with the agent and avoiding residual impurities in corners and gaps.

[0022] 4. The fluorine removal equipment and process for fluorine-containing wastewater described in the present invention helps to better achieve the stirring and driving effect of fluid flow through the twisted arrangement of the guide plate and the driven plate, and can make the sediment move downward more efficiently. The circular groove on the edge of the inner circular wall of the lower shell is connected to the bottom groove to facilitate the sediment to enter the bottom shell. The special structure of the injection groove may be used to control the injection direction and speed of the fluid, thereby increasing the mixing and reaction efficiency.

[0023] 5. The fluorine removal equipment and process for fluorine-containing wastewater described in the present invention adopts high-performance plastics for parts such as the cross ring block, which has the advantages of light weight, strong hardness, good sealing and corrosion resistance. The rotation speed of the cross ring block and its connected parts can be increased, thereby increasing the mixing efficiency. A heating unit is provided in the outer shell outside the shell to heat the equipment, thereby increasing the reaction efficiency of the wastewater and the precipitant. The aluminum silicate fiber plays a role in heat preservation and heat insulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 is a stereogram of the present invention;

[0026] Figure 2 is a front cross-sectional view of the housing of the present invention;

[0027] Figure 3 is a front cross-sectional view of the present invention;

[0028] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0029] Figure 5 yes Figure 3 Enlarged view of point B in the middle;

[0030] Figure 6 yes Figure 3 Enlarged view of point C in the middle;

[0031] Figure 7 It is a diagram of the internal structure of the housing of the present invention;

[0032] Figure 8 It is a partial structural diagram of the present invention;

[0033] Fig. 9 It is a partial structural diagram of the present invention;

[0034] Fig.10 is a top view of the cross-sectional view of the ion column in the present invention;

[0035] Fig.11 It is a three-dimensional diagram of a cross ring block.

[0036] In the figure: 11, upper shell; 12, lower shell; 13, U column; 14, first ring pipe; 15, Venturi tube; 16, second ring pipe; 17, access pipe; 18, wastewater discharge pipe; 2, cross ring block; 21, L ring block; 22, ring square groove; 23, oblique groove; 24, injection groove; 3, connecting column; 31, rotating column; 32, rotating ring; 33, gear ring; 34, gear; 35, guide plate; 4 , support; 41, ion column; 42, first column cavity; 43, second column cavity; 44, connecting pipe; 45, inner ring pipe; 46, outer ring pipe; 47, liquid outlet pipe; 48, third pipe; 5, circulation pump; 51, first pipe; 52, second pipe; 53, medicine pipe; 6, bottom shell; 61, slide plate; 62, electric push rod; 7, driven plate; 71, inner ring plate; 72, outer ring plate; 8, circular groove; 9, outer shell. DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0038] Embodiment 1

[0039] like Figures 1 to 11 As shown, a fluorine removal device and process for fluorine-containing wastewater according to an embodiment of the present invention comprises a shell; the shell is composed of an upper shell 11 and a lower shell 12, the upper shell 11 and the lower shell 12 are fixedly connected by a group of U-pillars 13, and a connecting rotating member is provided between the upper shell 11 and the lower shell 12; a first annular tube 14 is fixedly connected to the outer circular wall of the lower shell 12, a group of venturi tubes 15 are fixedly connected to the top of the first annular tube 14, and the venturi tubes 15 are inclinedly arranged, a second annular tube 16 is fixedly connected to the lower shell 12 by a group of fixing columns, and the interior of the second annular tube 16 is connected to a group of bifurcated tubes of the venturi tubes 15; the first annular tube 14 and the second annular tube 16 are both provided with an access pipe 17, and the lower shell 12 A wastewater discharge pipe 18 is provided at the bottom; a mixing and uniforming member is provided in the shell, and a sediment collecting member is provided at the bottom of the lower shell 12; when working, the upper shell 11 and the lower shell 12 are fixed by the U-column 13, the connecting rotating member is used to connect the upper and lower shells 12 and play a specific fluid guiding role, and the wastewater is sprayed through the inclined venturi tube 15. Due to the specific structure of the venturi tube 15, the wastewater is automatically mixed with the precipitant in its bifurcated tube when passing through the venturi tube 15. The wastewater discharge pipe 18 is used to discharge the treated wastewater, the mixing and uniforming member in the shell is used to fully mix the wastewater with the defluorination substance, the resin recycling component is used for defluorination treatment, and the sediment collecting member collects the sediment generated during the treatment process.

[0040] The connecting rotating member includes a cross ring block 2, the bottom end of the upper shell 11 and the top end of the lower shell 12 are both rotatably connected to the cross ring block 2 through a square ring groove, an L ring block 21 is fixedly connected to the outer circular wall of the lower shell 12, and the top end of the venturi tube 15 passes through the L ring block 21; a ring square groove 22 is provided on the inner arc wall of the L ring block 21, and the outer end of the cross ring block 2 is rotatably connected in the ring square groove 22, a group of oblique grooves 23 are provided at the bottom end of one side of the cross ring block 2, and the oblique grooves 23 are arranged in the same direction as the inclination direction of the venturi tube 15; a group of injection grooves 24 are provided at the lower end of the cross ring block 2; the venturi tube 15 and its bifurcated pipe are both provided with a flow control valve; when working, the cross ring block 2 in the connecting rotating member is in the square ring grooves at the corresponding ends of the upper and lower shells 12 and the outer L ring grooves of the lower shell 12 The ring block rotates in the square groove 22, and the direction of the oblique groove 23 is the same as the inclination direction of the Venturi tube 15. The high-speed fluid injected through the Venturi tube 15 drives the cross ring block 2 to rotate, so that the direction of the wastewater injected through the injection groove 24 is not fixed, so that the wastewater is mixed in the Venturi tube 15 and then sprayed out from multiple injection grooves 24 again for mixing, thereby increasing the reaction efficiency of the wastewater and the precipitant.

[0041] The mixing uniform member includes a connecting column 3, a group of connecting columns 3 are fixedly connected to the inner ring wall of the cross ring block 2, and a rotating column 31 is rotatably connected to the connecting column 3 through a circular groove, and the top and bottom of the inner wall of the shell are rotatably connected to a rotating ring 32 through a square ring groove, and the two ends of the rotating column 31 are rotatably connected to a pair of rotating rings 32 respectively; a gear ring 33 is fixedly connected to the inner ring wall of the upper shell 11, a group of rotating columns 31 are fixedly connected to a gear 34, and the gear 34 and the gear ring 33 are meshed, and a group of rotating columns 31 are fixedly connected to a guide plate 35; when working, the cross ring block 2 and the connecting column 3 are rotated by the wastewater acting on the oblique groove 23, and because the gear ring 33 is meshed with the gear 34 on the rotating column 31, the guide plate 35 is driven to rotate by the rotating column 31, and a group of guide plates 35 rotate and revolve, so as to complete the sufficient stirring and mixing of the wastewater and the precipitant in the shell, and the mixing efficiency of the wastewater and the precipitant is increased in a non-powered manner, which has practical value.

[0042] Furthermore, a gear ring is fixedly connected to the top of the cross ring block 2; a motor is fixedly connected to the top of the shell; a driving gear is fixedly connected to the output end of the motor, and the driving gear and the gear ring are meshed; when working, the efficiency of stable operation of the equipment is increased by setting up the motor, and when dealing with special situations, the motor can be started to drive the cross ring block 2 to rotate.

[0043] The resin recycling component includes an ion column 41 and a recycling unit; the top of the lower shell 12 is fixedly connected to a support 4, and the top of the support 4 is provided with an ion column 41, and the ion column 41 is divided into a first column cavity 42 and a second column cavity 43 by an arc plate, and the top and bottom ends of the first column cavity 42 and the second column cavity 43 are respectively provided with an inner ring tube 45 and an outer ring tube 46 through a pair of connecting tubes 44, and the connecting tube 44 and the inner ring tube 45 and the outer ring tube 46 are all connected. The top and bottom of the shell are fixedly connected to the inner ring tube 45 and the outer ring tube 46 through a fixed block. The outer ring tube 46 at the top of the ion column 41 is provided with a liquid outlet pipe 47, and the liquid outlet pipe 47 runs through the shell. The outer ring tube 46 at the bottom of the ion column 41 is connected to the wastewater discharge pipe 18 through the third pipe 48; when working, when it is necessary to perform higher standards of defluorination on the wastewater, the wastewater is introduced into the ion column 41 through the wastewater discharge pipe 18, the third pipe 48 and the outer ring tube 46, and the arc The plate divides the ion column 41 into a first column chamber 42 and a second column chamber 43, and a pair of connecting pipes 44 and electric valves are provided on the inner ring pipe 45 and the outer ring pipe 46, so that when the resin in the first column chamber 42 adsorbs fluorine ions to saturation, the electric valve on the connecting pipe 44 at the lower end of the first column chamber 42 can be closed to allow wastewater to enter the connecting pipe 44 at the lower end of the second column chamber 43, and then the fluorine ions on the resin in the first column chamber 42 are eluted by the recycling unit, thereby completing the recycling of the first column chamber 42 and the second column chamber 43, which can not only remove fluorine efficiently, but also avoid excessive saturation of a single resin, and increase the service life of the resin. The above functions can be used in combination, or the precipitation method can be used alone to discharge the wastewater through the wastewater discharge pipe 18. When faced with higher requirements for defluorination effect, the ion column 41 is used in combination for adsorption, making the equipment more flexible and adaptable. At the same time, a combination of equipment can be used to reduce equipment costs.

[0044] The circulation regeneration unit comprises a circulation pump 5, the top of the upper shell 11 is fixedly connected with the circulation pump 5, the inner ring tube 45 at the bottom end of the ion column 41 is connected to the water inlet end of the circulation pump 5 through the first tube 51, the water outlet end of the circulation pump 5 is connected to the inner ring tube 45 at the top end of the ion column 41 through the second tube 52, the second tube 52 is provided with a reagent tube 53, the reagent tube 53, the connecting tube 44 and the third tube 48 are all provided with electric valves; when working, the eluent is transported into the inner ring tube 45 by the circulation pump 5, and the electric valves on the pair of connecting tubes 44 on the inner ring tube 45 are also controlled. When the first column cavity 42 is eluted, the electric valve on the connecting tube 44 connected to the second column cavity 43 is closed, so that the eluent enters the first column cavity 42, and at the same time, the electric valve on the connecting tube 44 on the outer ring tube 46 connected to the first column cavity 42 is closed, so that the wastewater enters the second column cavity 43 for defluorination, and at the same time, the fluoride ions in the first column cavity 42 are eluted to complete the recycling effect.

[0045] The sediment collecting member comprises a bottom shell 6, the bottom edge of the lower shell 12 is fixedly connected with the bottom shell 6 through a bottom groove, the side wall of the bottom shell 6 is slidably connected with a slide plate 61 through a square groove, the bottom end of the lower shell 12 is fixedly connected with an electric push rod 62, the output end of the electric push rod 62 is fixedly connected to the side wall of the slide plate 61, and a threaded cover is provided at the bottom of the bottom shell 6; during operation, the slide plate 61 slides in the square groove of the side wall of the bottom shell 6, and the electric push rod 62 pushes the slide plate 61 to move, and the threaded cover is used to open and clean the sediment when necessary, and a group of guide plates 35 rotate and revolve, so that the precipitated solid moves along the inner edge of the lower shell 12 to the bottom shell 6, when the wastewater is discharged, after a period of sedimentation, the solid sediment accumulates at the bottom of the shell, and the plasma jet gas can be used to drive the cross ring block 2 to rotate, thereby driving the guide plate 35 to rotate continuously, so that the sediment enters the bottom shell 6 and is collected, and after the collection is completed, the slide plate 61 is closed to discharge the wastewater to prevent the sediment from overflowing with the flow of the wastewater.

[0046] Embodiment 2

[0047] like Figures 5 to 10 As shown, on the basis of the first embodiment, a driven plate 7 and an ion column 41 are added to rotate, so that the efficiency of the ion column 41 in the process of eluting fluorine ions and adsorbing fluorine ions is increased; a group of driven plates 7 are fixedly connected to the outer circular wall of the ion column 41, and an inner ring plate 71 and an outer ring plate 72 are rotatably connected between the inner arc walls of a pair of inner ring tubes 45 and outer ring tubes 46 through grooves, and the connecting tube 44, the liquid outlet pipe 47 and the third tube 48 all penetrate the inner ring plate 71 and the outer ring plate 72, and the support 4 and the ion column 41 are rotatably connected; when working, a group of guide plates 35 rotate and revolve, and the driven plate 7 is set and the ion column 41 and the support 4 are rotatably connected, so that the guide plate 35 can drive the ion column 41 to rotate, and then after the wastewater enters the ion column 41, the rotation of the ion column 41 can increase the contact area between the resin and the wastewater, and can destroy the boundary layer on the surface of the resin, thereby increasing the efficiency of wastewater defluorination and fluorine ion elution by the agent.

[0048] A group of the guide plates 35 and the driven plates 7 are arranged in a twisted shape, a circular groove 8 is opened at the edge of the inner circular wall of the lower shell 12, and the circular groove 8 is connected to the bottom groove, and the injection groove 24 is arranged to have a smaller opening toward the inside of the shell and a larger opening toward the outside of the shell; when working, the twisted arrangement of the guide plates 35 and the driven plates 7 helps to better achieve the stirring and driving effect of the fluid flow, and can make the sediment move downward more efficiently, the circular groove 8 on the edge of the inner circular wall of the lower shell 12 is connected to the bottom groove to facilitate the sediment to enter the bottom shell 6, and the special structure of the injection groove 24 may be used to control the injection direction and speed of the fluid, thereby increasing the mixing and reaction efficiency.

[0049] Embodiment 3

[0050] like Figures 1 to 11 As shown, on the basis of the second embodiment, a heating unit is added to heat the wastewater inside the shell to increase the reaction efficiency; the cross ring block 2, the inner ring block, the outer ring block, the rotating column 31, the gear 34 and the guide plate 35 are all made of high-performance plastics; a shell 9 is fixedly connected to the outer circular wall of the shell, and a pair of access pipes 17 pass through the shell 9, and a heating unit is arranged in the shell 9; aluminum silicate fibers are fixedly connected to the inner wall of the shell 9; when working, the cross ring block 2 and other parts are made of high-performance plastics, which have the advantages of light weight, strong hardness, good sealing and corrosion resistance, etc., which can increase the rotation speed of the cross ring block 2 and the parts connected thereto, thereby increasing the mixing efficiency; a heating unit is arranged in the shell 9 outside the shell to heat the equipment, thereby increasing the reaction efficiency of the wastewater and the precipitant, and the aluminum silicate fibers play a role of heat preservation and heat insulation.

[0051] A defluorination process for fluorine-containing wastewater, applicable to the above-mentioned defluorination equipment for fluorine-containing wastewater, characterized in that it comprises the following steps:

[0052] S1: First, the upper shell and the lower shell are connected by connecting the rotating parts. The wastewater is ejected at high speed by multiple venturi tubes and acts on the oblique groove, driving the cross ring block to rotate. In addition, because the gear and the gear ring are meshed, the guide plate rotates while revolving around the ion column as the axis, thereby fully mixing the wastewater and the precipitant in the shell;

[0053] S2: Then, by setting up the first column cavity (42) and the second column cavity (43) in the ion column (41), as well as the inner ring tube (45), the outer ring tube (46) and the circulation pump (5), while the ion column (41) further adsorbs and deeply removes fluorine from the wastewater, the fluorine ions on the resin in the inner column cavity of the ion column (41) can be cyclically eluted, so that the resin can be recycled, thereby increasing the service life of the resin and reducing its use cost;

[0054] S3: The twisted design of the guide plate (35) and the driven plate (7) enhances the mixing effect of the wastewater and the precipitant, while facilitating the gravity sinking of the precipitate for easy collection. In addition, the rotating design of the ion column (41) increases the contact position between the wastewater and the resin, thereby improving the defluorination efficiency.

[0055] Working principle: The upper shell 11 and the lower shell 12 are fixed by the U-pillar 13, the connecting rotating part is used to connect the upper and lower shells 12 and play a specific fluid guiding role, and the wastewater is sprayed through the inclined Venturi tube 15. Because of the specific structure of the Venturi tube 15, the wastewater automatically mixes the precipitant in its bifurcated tube when passing through the Venturi tube 15. The wastewater discharge pipe 18 is used to discharge the treated wastewater. The mixing uniform part in the shell is used to fully mix the wastewater with the defluorination substance. The resin recycling component is used for defluorination treatment. The sediment collection part collects the sediment generated during the treatment process. The cross ring block 2 in the connecting rotating part is connected to the square ring groove at the corresponding ends of the upper and lower shells 12 and the outer L of the lower shell 12. The ring block rotates in the square groove 22, and the direction of the oblique groove 23 is the same as the inclination direction of the Venturi tube 15, which is used for the high-speed fluid injected through the Venturi tube 15 to drive the cross ring block 2 to rotate, so that the direction of the wastewater injected through the injection groove 24 is not fixed, so that the wastewater is mixed in the Venturi tube 15 and then sprayed out from multiple injection grooves 24 again for mixing, thereby increasing the reaction efficiency of the wastewater and the precipitant. The wastewater acts on the oblique groove 23 to make the cross ring block 2 and the connecting column 3 rotate, and because the gear ring 33 is meshed with the gear 34 on the rotating column 31, the rotating column 31 drives the cross ring block 2 to rotate. The movable guide plate 35 rotates, and a group of guide plates 35 rotate and revolve to complete the sufficient stirring and mixing of the wastewater and the precipitant in the shell, and the mixing efficiency of the wastewater and the precipitant is increased in a non-powered manner, which has practical value. When it is necessary to perform higher standard defluorination on the wastewater, the wastewater is introduced into the ion column 41 through the wastewater discharge pipe 18, the third pipe 48 and the outer ring pipe 46. The arc plate divides the ion column 41 into a first column cavity 42 and a second column cavity 43, and a pair of connecting pipes 44 are provided on the inner ring pipe 45 and the outer ring pipe 46, and an electric valve is provided on each of them. , so that when the resin in the first column chamber 42 has reached saturation in adsorbing fluorine ions, the electric valve on the connecting pipe 44 at the lower end of the first column chamber 42 can be closed to allow wastewater to enter the connecting pipe 44 at the lower end of the second column chamber 43, and then the fluorine ions on the resin in the first column chamber 42 are eluted by the recycling unit, thereby completing the recycling of the first column chamber 42 and the second column chamber 43, which can not only effectively remove fluorine, but also increase the service life of the resin. The above functions can be used in combination or by precipitation method alone, and the wastewater can be discharged through the wastewater discharge pipe 18. When facing higher requirements for defluorination effect , then the ion column 41 is used in combination for adsorption, so that the equipment function is more flexible and adaptable, and at the same time, a combination of equipment is used to reduce equipment costs, and the eluent is transported to the inner ring tube 45 by the circulation pump 5, and is also achieved by controlling the electric valves on a pair of connecting pipes 44 on the inner ring tube 45. When eluting the first column chamber 42, the electric valve on the connecting pipe 44 connected to the second column chamber 43 is closed to allow the eluent to enter the first column chamber 42. At the same time, the electric valve on the connecting pipe 44 on the outer ring tube 46 connected to the first column chamber 42 is closed to allow the wastewater to enter the second column chamber 43 for defluorination.At the same time, the fluoride ions in the first column cavity 42 are eluted to achieve the recycling effect. The slide plate 61 slides in the square groove on the side wall of the bottom shell 6, and the electric push rod 62 pushes the slide plate 61 to move. The threaded cover is used to open and clean the sediment when needed. A group of guide plates 35 rotate and revolve, so that the precipitated solid moves along the inner edge of the lower shell 12 to the bottom shell 6. When the wastewater is discharged, after a period of sedimentation, the solid sediment accumulates at the bottom of the shell. The plasma can be used to spray gas to drive the cross ring block 2 to rotate, and then drive the guide plate 35 to rotate continuously, so that the sediment enters the bottom shell 6 and is collected. After the collection is completed, the slide plate 61 is closed to discharge the wastewater to prevent the sediment from overflowing with the flow of the wastewater. A group of guide plates 35 rotate and revolve, and the driven plate 7 is set and the ion column 41 and the support 4 are rotatably connected, so that the ion column 41 can be driven to rotate through the guide plate 35. After the wastewater enters the ion column 41, the rotation of the ion column 41 can increase the contact points between the resin and the wastewater, thereby increasing the defluorination efficiency of the wastewater. The twisted arrangement of the guide plate 35 and the driven plate 7 helps to better achieve the stirring and driving of the fluid flow, and can make the sediment move downward more efficiently. The circular groove 8 on the edge of the inner circular wall of the lower shell 12 is connected to the bottom groove to facilitate the sediment to enter the bottom shell 6. The special structure of the injection groove 24 may be used to control the injection direction and speed of the fluid, increase the mixing and reaction efficiency, and the cross ring block 2 and other parts are made of high-performance plastics, which have the advantages of light weight, strong hardness, good sealing and corrosion resistance. The rotation speed of the cross ring block 2 and its connected parts can be increased, thereby increasing the mixing efficiency. A heating unit is provided in the outer shell 9 outside the shell to heat the equipment and increase the reaction efficiency of the wastewater and the precipitant. The aluminum silicate fiber plays a role in heat preservation and insulation.

[0056] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A defluorination device for fluorine-containing wastewater, characterized in that: The invention comprises a shell; the shell comprises an upper shell (11) and a lower shell (12); the upper shell (11) and the lower shell (12) are fixedly connected via a group of U-pillars (13); a connecting rotating member is provided between the upper shell (11) and the lower shell (12); a first annular tube (14) is fixedly connected to the outer circular wall of the lower shell (12); a group of venturi tubes (15) are fixedly connected to the top of the first annular tube (14); and the venturi tubes (15) are inclinedly arranged; a second annular tube (16) is fixedly connected to the lower shell (12) via a group of fixing columns; and the interior of the second annular tube (16) is connected to a bifurcated tube of the group of venturi tubes (15); and the first annular tube (14) and the second annular tube (16) are both provided with The lower shell (12) is provided with a wastewater discharge pipe (18); the lower shell (12) is fixedly connected to a support (4) at the top, and an ion column (41) is provided at the top of the support (4); the ion column (41) is divided into a first column cavity (42) and a second column cavity (43) by an arc plate; the top and bottom ends of the first column cavity (42) and the second column cavity (43) are respectively provided with an inner ring tube (45) and an outer ring tube (46) through a pair of connecting tubes (44), and the connecting tubes (44) and the inner ring tube (45) and the outer ring tube (46) are all connected; a mixing uniformity component and a resin recycling component are provided in the shell, and a sediment collecting component is provided at the bottom of the lower shell (12); The connecting rotating member comprises a cross ring block (2), the bottom end of the upper shell (11) and the top end of the lower shell (12) are both rotatably connected to the cross ring block (2) through a square ring groove, an L ring block (21) is fixedly connected to the outer circular wall of the lower shell (12), and the top end of the venturi tube (15) passes through the L ring block (21); a square ring groove (22) is provided on the inner arc wall of the L ring block (21), and the outer end of the cross ring block (2) is rotatably connected in the square ring groove (22), a group of oblique grooves (23) are provided at the bottom end of one side of the cross ring block (2), and the oblique grooves (23) are arranged in the same direction as the inclination direction of the venturi tube (15); a group of injection grooves (24) are provided at the lower end of the cross ring block (2); and a flow control valve is provided on the venturi tube (15) and its bifurcated tube; The mixing uniformity member comprises a connecting column (3), a group of connecting columns (3) are fixedly connected to the inner ring wall of the cross ring block (2), a rotating column (31) is rotatably connected to the connecting column (3) via a circular groove, the top and bottom ends of the inner wall of the shell body are rotatably connected to a rotating ring (32) via a square ring groove, and the two ends of the rotating column (31) are rotatably connected to a pair of rotating rings (32) respectively; a gear ring (33) is fixedly connected to the inner ring wall of the upper shell body (11), a group of the rotating columns (31) are fixedly connected to a gear (34), and the gear (34) and the gear ring (33) are meshed, and a group of the rotating columns (31) are fixedly connected to a guide plate (35).

2. The defluorination equipment for fluorine-containing wastewater according to claim 1, characterized in that: The resin recycling part comprises an inner ring tube (45), the top and bottom of the shell are fixedly connected to the inner ring tube (45) and the outer ring tube (46) through a fixed block, the outer ring tube (46) at the top of the ion column (41) is provided with a liquid outlet pipe (47), and the liquid outlet pipe (47) runs through the shell, and the outer ring tube (46) at the bottom of the ion column (41) is connected to the wastewater discharge pipe (18) through a third pipe (48); a circulation pump (5) is fixedly connected to the top of the upper shell (11), the inner ring tube (45) at the bottom of the ion column (41) is connected to the water inlet end of the circulation pump (5) through a first pipe (51), and the water outlet end of the circulation pump (5) is connected to the inner ring tube (45) at the top of the ion column (41) through a second pipe (52), and a medicine pipe (53) is provided on the second pipe (52), and the medicine pipe (53), the connecting pipe (44) and the third pipe (48) are all provided with electric valves.

3. The defluorination equipment for fluorine-containing wastewater according to claim 2, characterized in that: The sediment collecting member comprises a bottom shell (6), the bottom edge of the lower shell (12) is fixedly connected to the bottom shell (6) via a bottom groove, the side wall of the bottom shell (6) is slidably connected to a slide plate (61) via a square groove, the bottom end of the lower shell (12) is fixedly connected to an electric push rod (62), the output end of the electric push rod (62) is fixedly connected to the side wall of the slide plate (61), and a threaded cover is provided at the bottom of the bottom shell (6).

4. The defluorination equipment for fluorine-containing wastewater according to claim 3, characterized in that: A group of driven plates (7) are fixedly connected to the outer circular wall of the ion column (41); an inner ring plate (71) and an outer ring plate (72) are rotatably connected between the inner arc walls of a pair of the inner ring tube (45) and the outer ring tube (46) through grooves; and the connecting pipe (44), the liquid outlet pipe (47) and the third pipe (48) all penetrate the inner ring plate (71) and the outer ring plate (72); the support (4) and the ion column (41) are rotatably connected.

5. The defluorination equipment for fluorine-containing wastewater according to claim 4, characterized in that: A group of the guide plates (35) and the driven plates (7) are arranged in a twisted shape, a circular groove (8) is provided at the edge of the inner circular wall of the lower shell (12), and the circular groove (8) is connected to the bottom groove, and the injection groove (24) is arranged to have a smaller opening toward the inside of the shell and a larger opening toward the outside of the shell.

6. The defluorination equipment for fluorine-containing wastewater according to claim 5, characterized in that: The cross ring block (2), the inner ring block, the outer ring block, the rotating column (31), the gear (34) and the guide plate (35) are all made of high-performance plastics; an outer shell (9) is fixedly connected to the outer circular wall of the shell, and a pair of access pipes (17) pass through the outer shell (9); a heating unit is provided in the outer shell (9); and aluminum silicate fibers are fixedly connected to the inner wall of the outer shell (9).

7. A defluorination process for fluorine-containing wastewater, applied to the defluorination equipment for fluorine-containing wastewater as claimed in claim 6, characterized in that: The following steps are involved: S1: First, the upper shell (11) and the lower shell (12) are connected by connecting the rotating parts, and the wastewater is ejected at high speed from the multiple venturi tubes (15) and acts on the inclined groove (23), driving the cross ring block (2) to rotate. In addition, because the gear (34) and the gear ring (33) are meshed, the guide plate (35) rotates while also revolving around the ion column (41) as the axis, thereby fully mixing the wastewater and the precipitant in the shell; S2: Then, the electric valve on the connecting pipe (44) connected to the first column chamber (42) and the second column chamber (43) is controlled to allow the wastewater to selectively enter the first column chamber (42) or the second column chamber (43). At the same time, the other column chamber that has not been defluorinated for the wastewater uses an eluent to elute the fluoride ions on the resin inside it, thereby increasing the service life of the resin and reducing its use cost; S3: When a group of guide plates (35) rotate along the axis and rotate themselves, the liquid is driven to flow and act on the driven plate (7), thereby driving the ion column (41) to rotate, thereby increasing the contact position between the wastewater and the resin and improving the defluorination efficiency.

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