Beryllium-containing wastewater circulation comprehensive utilization method and reaction device

Abstract

The invention relates to the technical field of beryllium-containing wastewater treatment, in particular to a beryllium-containing wastewater circulation comprehensive utilization method and a reaction device.The beryllium-containing wastewater circulation comprehensive utilization method comprises the steps that S1, precipitation wastewater and beryllium washing wastewater are added into the reaction device; s2, sodium hydroxide is added into the wastewater, so that beryllium ions in the wastewater generate insoluble beryllium hydroxide precipitates; s3, filtering the beryllium hydroxide precipitate, and calcining to obtain a beryllium-containing finished product; s4, carrying out evaporation concentration and cooling crystallization on the residual wastewater in the step S3 to obtain ammonium sulfate-containing crystallized concentrated liquid and evaporated liquid water; and S5, putting the ammonium sulfate-containing crystallization concentrated liquid into a centrifugal machine, and carrying out centrifugal separation to obtain an ammonium sulfate crystal substance. Through periodic forward and reverse rotation of the rotating shaft II, beryllium hydroxide wastewater can be alternately filtered and discharged, so that the filtering efficiency can be improved, and ammonium sulfate, beryllium sulfate and water resources in the wastewater can be effectively recycled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of beryllium-containing wastewater treatment, in particular to a beryllium-containing wastewater recycling and comprehensive utilization method and a reaction device. BACKGROUND

[0002] Beryllium is a rare light metal element with many excellent physical and chemical properties, and is an important material that cannot be replaced in high-tech fields such as aerospace and nuclear industry. The core of beryllium production is to extract and purify metallic beryllium or beryllium oxide from beryllium-containing minerals. The main process is centered on "mining and ore dressing → roasting pretreatment → acid leaching → purification and purification → precipitation and crystallization → reduction of beryllium". A large amount of beryllium-containing wastewater is generated in the production process of beryllium industry. The main components in the beryllium-containing wastewater are: a small amount of ammonium sulfate, beryllium sulfate and more than 90% water.

[0003] The existing beryllium-containing wastewater is directly discharged to the tailings storage after a large amount of beryllium-containing wastewater is treated, and the valuable components such as ammonium sulfate in the beryllium-containing wastewater are not recovered, causing waste of resources. The content of beryllium in these wastewaters is often high and difficult to remove by conventional methods, which poses a serious threat to the environment and human health. SUMMARY

[0004] In order to solve the above problems, the present application provides a beryllium-containing wastewater recycling and comprehensive utilization method, comprising the following steps: S1, adding the precipitation wastewater and the beryllium washing wastewater into the reaction device; S2, adding sodium hydroxide into the wastewater to make the beryllium ions in the wastewater form insoluble beryllium hydroxide precipitate; S3, filtering the beryllium hydroxide precipitate and calcining to obtain a beryllium-containing finished product; S4, evaporating and concentrating the wastewater left in the step S3, and cooling and crystallizing to obtain a crystallization concentrated liquid containing ammonium sulfate and evaporation liquid water; S5, putting the crystallization concentrated liquid containing ammonium sulfate into a centrifugal machine to obtain ammonium sulfate crystals by centrifugal separation; S6, transporting the evaporation liquid water generated in the step S5 to the front-end acid leaching process for recycling, and transporting the ammonium sulfate to the front-end precipitation and crystallization process as raw material; The reaction device in S1 comprises a tank body, a mixing unit for stirring the wastewater and a separation unit for filtering the wastewater are installed on the tank body, and an automatic dosing machine for adding sodium hydroxide into the wastewater is installed on the top of the tank body.

[0005] The mixing unit comprises a mixing cavity arranged in the interior of the tank body, an agitating assembly is arranged in the interior of the mixing cavity, a feeding port and a discharging port are fixedly connected to the top and bottom of the mixing cavity respectively, a valve plate is rotatably arranged in the interior of each of the feeding port and the discharging port through a valve rod, a linkage assembly for driving the two valve plates to rotate synchronously is arranged on the left side of the tank body, and a turnover assembly for driving the valve plate to rotate is arranged on the right side of the discharging port.

[0006] The separation unit comprises a separation cavity arranged in the interior of the tank body and below the discharging port, a filter barrel for filtering wastewater is rotatably arranged in the interior of the separation cavity, a rotating shaft two is rotatably arranged in the middle of the filter barrel, helical leaves for pushing the precipitate to move upward and discharge are arranged on the rotating shaft two, a one-way transmission assembly for driving the filter barrel to rotate in one direction is arranged on the rotating shaft two, and a driving motor for driving the rotating shaft two to rotate is fixedly arranged on the bottom of the tank body.

[0007] In a possible implementation, the agitating assembly comprises a rotating shaft one rotatably arranged at the axis of the mixing cavity, scrapers are arranged on the left and right sides of the rotating shaft one, a lifting component for driving the scrapers to move upward when rotating clockwise is arranged on the rotating shaft one, a stirring rod above the scrapers is fixedly connected to the rotating shaft one, and the bottom end of the rotating shaft one is coaxially fixedly connected to the top end of the rotating shaft two.

[0008] In a possible implementation, the lifting component comprises two blocking rings fixedly arranged on the rotating shaft one and distributed upward and downward, a movable ring between the two blocking rings is movably sleeved on the rotating shaft one, a helical guide groove between the two blocking rings is formed in the rotating shaft one, and a guide block in sliding fit with the helical guide groove is fixedly connected to the inner ring wall of the movable ring.

[0009] In a possible implementation, the linkage assembly comprises swing arms fixedly connected to the left ends of the valve rods and arranged on the left side of the tank body, a linkage rod is rotatably arranged at the ends of the two swing arms away from the corresponding valve rods, and the upper valve plate is in the open state while the lower valve plate is in the closed state.

[0010] In a possible implementation, the turnover assembly comprises a housing fixedly arranged on the right side of the discharging port, a transmission gear is rotatably arranged in the interior of the housing, the right end of the lower valve rod is rotatably penetrated into the interior of the housing and coaxially fixedly connected to the transmission gear, a driving rack in meshing fit with the transmission gear is slidably arranged in the interior of the housing, a push rod is slidably arranged on the right side of the driving rack, a return spring is fixedly connected between the right side of the push rod and the inner wall of the driving rack, the right end of the return spring is penetrated to the exterior of the housing, and the bottom end of the rotating shaft one is rotatably penetrated into the lower part of the mixing cavity and fixedly connected to a lifting paddle for pushing the push rod to move upward and downward.

[0011] In a possible implementation form, an inner ring wall of the separation cavity is fixedly provided with a receiving groove sleeved on the outside of the filter barrel, the receiving groove is located above the surface filter hole of the filter barrel, a first discharge port is formed in the right side of the separation cavity, a bottom of the first discharge port is flush with an upper surface of the receiving groove, and a second discharge port is formed in the bottom of the separation cavity.

[0012] In a possible implementation form, a plurality of discharge ports above the receiving groove are uniformly formed in the circumference of the filter barrel, and a plurality of pushing pieces above the receiving groove are uniformly mounted on the outer ring wall of the filter barrel and are slidingly mounted on the top of the receiving groove.

[0013] In a possible implementation form, the one-way transmission assembly comprises a plurality of ratchet grooves uniformly formed on the inner wall of the filter barrel, a plurality of ratchet claws are uniformly distributed and hinged on the outer ring wall of the second rotating shaft, a support spring is fixedly connected between the outer ring wall of the second rotating shaft and the side of the ratchet claw close to the central axis of the second rotating shaft, and a bottom end of the second rotating shaft is fixedly connected with the output shaft of the driving motor after rotatingly penetrating into the bottom of the tank.

[0014] The present application has the following beneficial effects: 1. The driving motor drives the second rotating shaft to rotate periodically in the forward and reverse directions. When the second rotating shaft rotates clockwise, the lower valve plate opens, and the wastewater in the mixing cavity enters the filter barrel. At this time, the second rotating shaft drives the filter barrel to rotate through the one-way transmission assembly, so that the filter barrel filters the beryllium hydroxide in the wastewater. When the second rotating shaft rotates counterclockwise, the lower valve plate closes to separate the mixing cavity from the separation cavity. The helical blade rotates counterclockwise through the second rotating shaft. At this time, the filter barrel does not rotate with the second rotating shaft. The beryllium hydroxide precipitated in the filter barrel is pushed upward to avoid blockage caused by excessive accumulation of beryllium hydroxide in the filter barrel, facilitating subsequent filtration of beryllium hydroxide wastewater. Periodic forward and reverse rotation of the second rotating shaft can alternately filter and discharge beryllium hydroxide wastewater, which is conducive to improving the filtration efficiency and effectively recycling ammonium sulfate, beryllium sulfate and water resources in the wastewater.

[0015] 2. The second rotating shaft rotates periodically in the forward and reverse directions while rotating in the forward and reverse directions. When the first rotating shaft rotates counterclockwise, the upper valve plate opens and the lower valve plate closes. At this time, the beryllium-containing wastewater can enter the mixing cavity from the inlet. The lifting component guides the scraper to move upward and separate from the bottom of the mixing cavity. The first rotating shaft drives the stirring rod and the scraper to rotate to stir the wastewater, promoting the mixing of the wastewater and sodium hydroxide. When the first rotating shaft rotates clockwise, the upper valve plate closes and the lower valve plate opens, so that the wastewater in the mixing cavity enters the filter barrel. At this time, the lifting component guides the scraper to move downward, and the scraper scrapes the beryllium hydroxide precipitate on the bottom of the mixing cavity, so that the beryllium hydroxide precipitate enters the filter barrel with the wastewater, avoiding the residue of the beryllium hydroxide precipitate on the bottom of the mixing cavity.

[0016] 3、The rotating shaft one drives the lifting switch plate to rotate periodically in positive and reverse directions, when the lifting switch plate rotates clockwise, the lifting switch plate pushes the push rod and the driving rack to move upwards, the driving rack drives the transmission gear to rotate, the transmission gear drives the lower valve plate to rotate, so that the lower valve plate is opened, the lower valve plate drives the upper valve plate to close through the linkage assembly, conversely, when the lifting switch plate rotates counterclockwise, the lower valve plate rotates reversely to close, the lower valve plate drives the upper valve plate to open through the linkage assembly, the periodic opening and closing of the upper and lower valve plates are controlled through the periodic positive and reverse rotation of the rotating shaft one, so that the beryllium-containing wastewater is orderly controlled to enter the mixing cavity and the filter barrel for treatment. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the process flow chart of the present application.

[0018] Figure 2 is the perspective structural schematic view of the separation device of the present application.

[0019] Figure 3 is the front cross-sectional view of the separation device of the present application.

[0020] Figure 4 is the partial cross-sectional view of the mixing unit of the present application.

[0021] Figure 5 is the partial cross-sectional view of the lifting component of the present application.

[0022] Figure 6 is the perspective structural schematic view of the linkage assembly of the present application.

[0023] Figure 7 is the partial cross-sectional view of the turnover assembly of the present application.

[0024] Figure 8 is the partial cross-sectional view of the separation unit of the present application.

[0025] Figure 9 is the partial cross-sectional view of the one-way transmission assembly of the present application.

[0026] In the figure: 1, tank body; 2, mixing unit; 21, mixing cavity; 22, stirring assembly; 221, rotating shaft one; 222, scraper; 223, lifting component; 2231, blocking ring; 2232, movable ring; 2233, spiral guide groove; 2234, guide block; 23, feeding port; 24, discharging port; 25, valve plate; 26, linkage assembly; 261, swing arm; 262, linkage rod; 27, turnover assembly; 271, housing; 272, transmission gear; 273, driving rack; 274, push rod; 275, return spring; 276, lifting paddle; 3, automatic dosing machine; 4, separation unit; 41, separation cavity; 411, receiving groove; 412, discharging port one; 413, discharging port two; 42, filter barrel; 421, discharging port; 422, push paddle; 43, rotating shaft two; 44, spiral blade; 45, one-way transmission assembly; 451, ratchet groove; 452, pawl; 453, supporting spring; 46, driving motor. DETAILED DESCRIPTION

[0027] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0028] Please refer to Figure 1 Figure 9 A comprehensive utilization method of beryllium-containing wastewater, comprising the following steps: S1, adding the precipitated wastewater and the beryllium washing wastewater into a reaction device; S2, adding sodium hydroxide into the wastewater, so that the beryllium ions in the wastewater form a difficultly soluble beryllium hydroxide precipitate; S3, filtering the beryllium hydroxide precipitate and calcining to obtain a beryllium-containing finished product; S4, evaporating and concentrating the wastewater left in the step S3, and cooling and crystallizing to obtain a crystallized concentrated solution containing ammonium sulfate and evaporated liquid water; S5, feeding the crystallized concentrated solution containing ammonium sulfate into a centrifugal machine to obtain ammonium sulfate crystals by centrifugal separation; S6, feeding the evaporated liquid water generated in the step S5 to the front-end acid-soluble leaching process for recycling, and feeding the ammonium sulfate to the front-end precipitation and crystallization process as raw material; In the step S1, the reaction device comprises a tank body 1, a mixing unit 2 for stirring the wastewater is installed on the tank body 1, and a separation unit 4 for filtering the wastewater is also installed on the tank body 1, and an automatic dosing machine 3 for adding sodium hydroxide into the wastewater is installed on the top of the tank body 1. ​

[0029] The mixing unit 2 comprises a mixing cavity 21 arranged in the tank body 1, a stirring assembly 22 is arranged in the mixing cavity 21, an inlet 23 and a discharge outlet 24 are fixedly connected to the top and bottom of the mixing cavity 21 respectively, a valve plate 25 is rotatably arranged in the inlet 23 and the discharge outlet 24 through a valve rod, a linkage assembly 26 for driving the two valve plates 25 to rotate synchronously is arranged on the left side of the tank body 1, and a turnover assembly 27 for driving the valve plate 25 to rotate is arranged on the right side of the discharge outlet 24.

[0030] The separation unit 4 comprises a separation cavity 41 arranged in the tank body 1 and below the discharge outlet 24, the bottom of the discharge outlet 24 is communicated with the top of the separation cavity 41, a filter barrel 42 for filtering wastewater is rotatably arranged in the separation cavity 41, the discharge outlet 24 is located directly above the filter barrel 42, a second rotating shaft 43 is rotatably arranged in the middle of the filter barrel 42, a spiral blade 44 for pushing the precipitate to move upward and discharge is arranged on the second rotating shaft 43, a one-way transmission assembly 45 for driving the filter barrel 42 to rotate in one direction is arranged on the second rotating shaft 43, and a driving motor 46 for driving the second rotating shaft 43 to rotate is fixedly arranged on the bottom of the tank body 1. It should be noted that the automatic dosing machine 3 is prior art, and the automatic dosing machine 3 is used for adding sodium hydroxide into the wastewater in the mixing cavity 21 regularly and quantitatively.

[0031] In specific use, the second rotating shaft 43 is driven by the driving motor 46 to rotate counterclockwise, at this time, the upper valve plate 25 is opened and the lower valve plate 25 is closed, the beryllium-containing wastewater enters the mixing cavity 21 from the inlet 23, the automatic dosing machine 3 adds an appropriate amount of sodium hydroxide into the wastewater in the mixing cavity 21, and the stirring assembly 22 is used for stirring the wastewater and the sodium hydroxide, so that the beryllium ions combine with the hydroxyl ions to generate beryllium hydroxide precipitate.

[0032] After the reaction is completed, the second rotating shaft 43 is driven by the driving motor 46 to rotate clockwise, at this time, the upper valve plate 25 is closed and the lower valve plate 25 is opened, the wastewater in the mixing cavity 21 carrying the beryllium hydroxide precipitate falls into the filter barrel 42 from the discharge outlet 24, the filter barrel 42 is driven by the second rotating shaft 43 to rotate clockwise through the one-way transmission assembly 45, the spiral blade 44 rotates together with the second rotating shaft 43, and the filter barrel 42 is used for filtering the wastewater, so that the beryllium hydroxide precipitate remains in the filter barrel 42.

[0033] After the filtration is completed, the second rotating shaft 43 is driven by the driving motor 46 to rotate counterclockwise, at this time, the second rotating shaft 43 no longer drives the filter barrel 42 to rotate synchronously, the spiral blade 44 rotates counterclockwise under the drive of the second rotating shaft 43, the spiral blade 44 is used for pushing the beryllium hydroxide precipitate upward from the filter barrel 42, so as to facilitate the filtration treatment of subsequent wastewater, and at this time, the mixing and stirring of the beryllium-containing wastewater and the sodium hydroxide in the mixing cavity 21 are simultaneously performed, thereby improving the efficiency of wastewater treatment.

[0034] Please refer to Figure 2 - Figure 5 The stirring assembly 22 comprises a rotating shaft I 221 coaxially fixed at the axis of the mixing cavity 21, and scraping plates 222 are arranged on both sides of the rotating shaft I 221. A lifting component 223 is arranged on the rotating shaft I 221 and used to drive the scraping plates 222 to move upward when the rotating shaft I 221 rotates clockwise. A stirring rod is fixedly connected to the rotating shaft I 221 above the scraping plates 222. The bottom end of the rotating shaft I 221 is coaxially fixedly connected to the top end of the rotating shaft II 43.

[0035] In use, the rotating shaft II 43 drives the rotating shaft I 221 to rotate synchronously. The rotating shaft I 221 drives the scraping plates 222 and the stirring rod to rotate, so that the scraping plates 222 and the stirring rod stir and mix the wastewater and sodium hydroxide, and promote the combination of beryllium ions and hydroxyl ions to generate beryllium hydroxide precipitate.

[0036] Please refer to Figure 3 - Figure 5 The lifting component 223 comprises two blocking rings 2231 fixedly arranged on the rotating shaft I 221 and distributed vertically. An active ring 2232 is movably sleeved on the rotating shaft I 221 and located between the two blocking rings 2231. A spiral guide groove 2233 is arranged on the rotating shaft I 221 and located between the two blocking rings 2231. A guide block 2234 is fixedly connected to the inner ring wall of the active ring 2232 and slidably matched with the spiral guide groove 2233.

[0037] In use, when the rotating shaft I 221 rotates counterclockwise, the spiral guide groove 2233 guides the guide block 2234 to move upward due to inertia. The guide block 2234 drives the active ring 2232 to move upward, and the active ring 2232 drives the scraping plates 222 to move upward and separate from the bottom of the mixing cavity 21. At this time, the rotating shaft I 221 drives the stirring rod and the scraping plates 222 to rotate and stir the wastewater, so as to promote the mixing of the wastewater and sodium hydroxide.

[0038] When the rotating shaft I 221 rotates clockwise, the spiral guide groove 2233 guides the guide block 2234 to move downward. The guide block 2234 drives the active ring 2232 to move downward, and the active ring 2232 drives the scraping plates 222 to move downward, so that the scraping plates 222 contact the bottom of the mixing cavity 21. The scraping plates 222 scrape the beryllium hydroxide precipitate on the bottom of the mixing cavity 21, so that the beryllium hydroxide precipitate enters the filter barrel 42 with the wastewater, and the beryllium hydroxide precipitate is prevented from remaining on the bottom of the mixing cavity 21.

[0039] Please refer to Figure 2 and Figure 6 The linkage assembly 26 comprises a swing arm 261 fixedly connected to the left end of the valve rod and located on the left side of the tank body 1. The linkage rod 262 is rotatably arranged at the ends of the two swing arms 261 away from the corresponding valve rods. When the upper valve plate 25 is in the open state, the lower valve plate 25 is in the closed state.

[0040] Specific use, when the lower valve plate 25 rotates, the lower valve plate 25 drives the lower swing arm 261 to rotate through the valve rod, the lower swing arm 261 drives the upper swing arm 261 to rotate through the linkage rod 262, and the upper swing arm 261 drives the upper valve plate 25 to rotate, so that the upper and lower valve plates 25 can rotate synchronously, facilitating the opening and closing of the feed inlet 23 and the discharge outlet 24, respectively, so that the wastewater can enter the mixing chamber 21 and the filter barrel 42 in sequence, avoiding the direct entry of wastewater without sodium hydroxide mixing into the filter barrel 42, resulting in the ineffective removal of beryllium in the wastewater.

[0041] Please refer to Figure 3 、 Figure 4 and Figure 7 , the turnover assembly 27 includes a housing 271 fixedly installed on the right side of the discharge outlet 24, a transmission gear 272 rotatably installed inside the housing 271, the right end of the lower valve rod rotatably penetrating into the inside of the housing 271 and fixedly connected with the transmission gear 272 coaxially, a drive rack 273 slidably installed inside the housing 271 and engaged with the transmission gear 272, a push rod 274 slidably installed on the right side of the drive rack 273, and a return spring 275 fixedly connected between the upper and lower sides of the push rod 274 and the inner wall of the drive rack 273. The right end of the return spring 275 penetrates to the outside of the housing 271, and the bottom end of the rotating shaft one 221 rotatably penetrates to the lower side of the mixing chamber 21 and is fixedly connected with a lifting paddle 276 for pushing the push rod 274 to move up and down.

[0042] Specific use, when the rotating shaft one 221 rotates counterclockwise, the rotating shaft one 221 drives the lifting paddle 276 to rotate counterclockwise, and the lifting paddle 276 pushes the push rod 274 to move downward, which compresses the lower return spring 275. When the lower return spring 275 is compressed to a certain extent, the push rod 274 can push the drive rack 273 to move downward through the return spring 275, and the drive rack 273 drives the lower valve plate 25 to rotate to the horizontal state through the transmission of the transmission gear 272, so that the discharge outlet 24 is closed. At this time, the upper valve plate 25 is rotated to the vertical state, so that the feed inlet 23 is opened, and the beryllium-containing wastewater is conveniently conveyed from the feed inlet 23 to the mixing chamber 21.

[0043] When the rotating shaft 221 rotates clockwise, the rotating shaft 221 drives the lifting paddle 276 to rotate clockwise, when the lifting paddle 276 no longer presses the push rod 274 downward, the push rod 274 is pushed upward by the reset spring 275, and then the lifting paddle 276 drives the push rod 274 to move upward, the push rod 274 drives the drive rack 273 to move upward through the reset spring 275, the drive rack 273 drives the lower valve plate 25 to rotate to the vertical state through the transmission gear 272, so that the discharge port 24 is opened, at this time the upper valve plate 25 rotates to the horizontal state, so that the feeding port 23 is closed, and the wastewater in the mixing cavity 21 is conveniently conveyed from the discharge port 24 to the filter barrel 42.

[0044] When the drive rack 273 moves to the bottom or top of the shell 271, the drive rack 273 cannot continue to move, and as the lifting paddle 276 continues to rotate, the reset spring 275 is further compressed, so that the push rod 274 can pass under or above the lifting paddle 276, avoiding affecting the continuous rotation of the rotating shaft 221, and when the lifting paddle 276 switches the rotation direction, as the lifting paddle 276 no longer pushes the push rod 274 downward or upward, the push rod 274 is reset to the middle of the drive rack 273 under the push of the reset spring 275, facilitating the reverse movement of the push rod 274 pushed by the reversed lifting paddle 276.

[0045] Please refer to Figure 2 , Figure 3 and Figure 8 , the inner ring wall of the separation cavity 41 is fixedly installed with a receiving groove 411 sleeved outside the filter barrel 42, the receiving groove 411 is located above the filter hole on the surface of the filter barrel 42, the right side of the separation cavity 41 is provided with a discharge port one 412, the bottom of the discharge port one 412 is flush with the upper surface of the receiving groove 411, and the bottom of the separation cavity 41 is provided with a discharge port two 413.

[0046] Please refer to Figure 3 and Figure 8 , the filter barrel 42 is circumferentially and uniformly provided with a plurality of discharge ports 421 located above the receiving groove 411, and the outer ring wall of the filter barrel 42 is circumferentially and uniformly provided with a plurality of push paddles 422 located above the receiving groove 411, the push paddles 422 are slidingly installed on the top of the receiving groove 411.

[0047] Please refer to Figure 3 and Figure 9The one-way transmission assembly 45 comprises a plurality of ratchet grooves 451 evenly arranged on the inner wall of the filter barrel 42, and a plurality of ratchet claws 452 are evenly arranged on the outer ring wall of the second rotating shaft 43 and are fixedly connected to the outer ring wall of the second rotating shaft 43 on the side close to the central axis of the second rotating shaft 43, and the ratchet claw 452 is fixedly connected with a supporting spring 453.

[0048] In particular, when the second rotating shaft 43 rotates clockwise, the second rotating shaft 43 drives the ratchet claw 452 to rotate clockwise, and at this time, the ratchet claw 452 and the ratchet groove 451 are engaged with each other, the second rotating shaft 43 drives the filter barrel 42 to rotate clockwise through the ratchet claw 452, so that the filter barrel 42 filters the wastewater, and the spiral blade 44 rotates with the second rotating shaft 43, and the wastewater falls into the separation cavity 41 and is discharged from the second discharge port 413, and the beryllium hydroxide precipitate is left in the filter barrel 42.

[0049] After the filtering is completed, the second rotating shaft 43 rotates counterclockwise, the second rotating shaft 43 drives the ratchet claw 452 to rotate counterclockwise, at this time, the ratchet claw 452 is no longer engaged with the ratchet groove 451, so that the filter barrel 42 is no longer synchronously rotated with the second rotating shaft 43, and the spiral blade 44 is driven to rotate counterclockwise by the second rotating shaft 43, so that the spiral blade 44 pushes the beryllium hydroxide precipitate to move upward, and when the beryllium hydroxide precipitate moves to the top of the spiral blade 44, the beryllium hydroxide precipitate is thrown from the discharge port 421 to the receiving groove 411.

[0050] When the subsequent filter barrel 42 filters the wastewater, the push material paddle 422 is driven to rotate, so that the push material paddle 422 pushes the beryllium hydroxide precipitate on the receiving groove 411 to the discharge port 412 for discharge, so as to facilitate the discharge of the beryllium hydroxide and the wastewater.

[0051] In the description of the present application, it should be pointed out that, unless otherwise specified and limited, the terms "arrangement", "connection", "installation", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, or it can be slidingly connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] The embodiments of the specific implementation are the preferred embodiments of the present application, not limited to the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A method for the comprehensive recycling and utilization of beryllium-containing wastewater, characterized in that, Includes the following steps: S1. Add the sedimentation wastewater and beryllium washing wastewater to the reaction apparatus; S2. Add sodium hydroxide to the wastewater to cause the beryllium ions in the wastewater to form insoluble beryllium hydroxide precipitate; S3. After filtering the beryllium hydroxide precipitate, calcination is carried out to obtain the beryllium-containing product; S4. The remaining wastewater from step S3 is evaporated, concentrated, cooled, and crystallized to obtain a concentrated crystallized solution containing ammonium sulfate and an evaporated liquid. S5. The concentrated solution containing ammonium sulfate crystals is put into a centrifuge, and ammonium sulfate crystals are obtained by centrifugation. S6. The evaporated water generated in step S5 is transported to the upstream acid leaching process for recycling, and the ammonium sulfate is transported to the upstream precipitation and crystallization process for use as raw material.

2. A reaction device for beryllium-containing wastewater, characterized in that: The reaction device includes a tank (1), on which a mixing unit (2) for stirring the wastewater and a separation unit (4) for filtering the wastewater are installed. An automatic dosing machine (3) for adding sodium hydroxide to the wastewater is installed on the top of the tank (1). The mixing unit (2) includes a mixing chamber (21) disposed inside the tank (1). A stirring assembly (22) is installed inside the mixing chamber (21). A feed inlet (23) and a discharge inlet (24) are fixedly connected to the top and bottom of the mixing chamber (21), respectively. A valve plate (25) is rotatably installed inside the feed inlet (23) and the discharge inlet (24) via a valve stem. A linkage assembly (26) for driving the upper and lower valve plates (25) to rotate synchronously is installed on the left side of the tank (1). A flipping assembly (27) for driving the valve plate (25) to rotate is installed on the right side of the discharge inlet (24).

3. The beryllium-containing wastewater reaction device according to claim 2, characterized in that: The separation unit (4) includes a separation chamber (41) located inside the tank (1) and below the discharge port (24). A filter barrel (42) for filtering wastewater is rotatably installed inside the separation chamber (41). A rotating shaft (43) is rotatably installed in the middle of the filter barrel (42). A spiral blade (44) for pushing the sediment upward and discharging is installed on the rotating shaft (43). A one-way transmission assembly (45) for driving the filter barrel (42) to rotate in one direction is installed on the rotating shaft (43). A drive motor (46) for driving the rotating shaft (43) to rotate is fixedly installed at the bottom of the tank (1).

4. The beryllium-containing wastewater reaction device according to claim 3, characterized in that: The stirring assembly (22) includes a rotating shaft (221) rotatably mounted on the central axis of the mixing chamber (21). Scrapers (222) are provided on both the left and right sides of the rotating shaft (221). A lifting component (223) is installed on the rotating shaft (221) for driving the scrapers (222) to move upward when rotating clockwise. A stirring rod located above the scrapers (222) is also fixedly connected to the rotating shaft (221). The bottom end of the rotating shaft (221) is coaxially fixedly connected to the top end of the rotating shaft (43).

5. The beryllium-containing wastewater reaction device according to claim 4, characterized in that: The lifting component (223) includes two retaining rings (2231) fixedly installed on a rotating shaft (221) and distributed vertically. A movable ring (2232) located between the two retaining rings (2231) is movably fitted on the rotating shaft (221). A spiral guide groove (2233) located between the two retaining rings (2231) is opened on the rotating shaft (221). A guide block (2234) that slides with the spiral guide groove (2233) is fixedly connected to the inner ring wall of the movable ring (2232).

6. The beryllium-containing wastewater reaction device according to claim 2, characterized in that: The linkage component (26) includes a swing arm (261) fixedly connected to the left end of the valve stem and located on the left side of the tank (1). The upper and lower swing arms (261) are rotatably mounted with a linkage rod (262) at the ends away from the corresponding valve stem. When the upper valve plate (25) is in the open state, the lower valve plate (25) is in the closed state.

7. The beryllium-containing wastewater reaction device according to claim 4, characterized in that: The flipping assembly (27) includes a housing (271) fixedly installed on the right side of the discharge port (24). A transmission gear (272) is rotatably installed inside the housing (271). The right end of the lower valve stem rotates through the housing (271) and is coaxially fixedly connected to the transmission gear (272). A drive rack (273) that meshes with the transmission gear (272) is slidably installed inside the housing (271). A push rod (274) is slidably installed on the right side of the drive rack (273). A return spring (275) is fixedly connected between the upper and lower sides of the push rod (274) and the inner wall of the drive rack (273). The right end of the return spring (275) extends through the outside of the housing (271). The bottom end of the rotating shaft (221) rotates through the bottom of the mixing chamber (21) and is fixedly connected to a lifting lever (276) for pushing the push rod (274) to move up and down.

8. The beryllium-containing wastewater reaction device according to claim 3, characterized in that: A receiving groove (411) is fixedly installed on the inner ring wall of the separation chamber (41) and sleeved on the outside of the filter barrel (42). The receiving groove (411) is located above the filter holes on the surface of the filter barrel (42). A discharge port (412) is opened on the right side of the separation chamber (41). The bottom of the discharge port (412) is flush with the upper surface of the receiving groove (411). A discharge port (413) is opened at the bottom of the separation chamber (41).

9. A beryllium-containing wastewater reaction device according to claim 8, characterized in that: The filter barrel (42) has several discharge ports (421) evenly distributed around the circumference above the receiving groove (411). The outer ring wall of the filter barrel (42) is evenly equipped with several pusher blades (422) evenly distributed around the circumference above the receiving groove (411). The pusher blades (422) are slidably installed on the top of the receiving groove (411).

10. A beryllium-containing wastewater reaction device according to claim 3, characterized in that: The one-way transmission assembly (45) includes several ratchet grooves (451) evenly opened on the inner wall of the filter barrel (42) in the circumferential direction. Several pawls (452) evenly distributed in the circumferential direction are hinged on the outer ring wall of the rotating shaft (43). A support spring (453) is fixedly connected between the side of the pawl (452) near the central axis of the rotating shaft (43) and the outer ring wall of the rotating shaft (43). The bottom end of the rotating shaft (43) rotates through to the bottom of the tank (1) and is then fixedly connected to the output shaft of the drive motor (46) in the same direction.

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