Ammonium tungstate mother liquor crystallization and sedimentation treatment device

Abstract

The utility model discloses a kind of ammonium tungstate mother liquor crystallization settlement processing device, including support plate;Still including crystallization tank and horizontal screw centrifuge, the upper end of support plate is provided with three crystallization tanks, three crystallization tanks are connected in series, spiral flow guide plate for prolonging mother liquor path is arranged in crystallization tank, stirring blade for stirring anti-deposition is arranged in crystallization tank, last crystallization tank is connected with inclined plate settling tank, multiple polypropylene corrugated plate groups that are set in forty-five degree angle inclination in inclined plate settling tank, the lower end of inclined plate settling tank is provided with bottom ultrasonic transducer for preventing crystal plate concretion.The utility model is provided with three crystallization tanks to improve mother liquor flow time, spiral flow guide plate is arranged in crystallization tank simultaneously, improve mother liquor prolong path, promote crystal growth, then through inclined plate settling tank to improve settlement efficiency, complete through horizontal screw centrifuge to carry out the cycle of crystal liquid separation, improve the problem of mother liquor crystallization settlement and recovery rate deficiency.

Description

Technical Field

[0001] This utility model belongs to the field of crystallization sedimentation treatment, specifically relating to a device for treating the crystallization sedimentation of ammonium tungstate mother liquor. Background Technology

[0002] The ammonium tungstate mother liquor crystallization and sedimentation treatment device is used to treat the crystallization mother liquor generated during the production of ammonium paratungstate (APT). Its core purpose is to recover valuable metals tungsten (WO3) and ammonium chloride (NH4Cl) from the mother liquor through crystallization, sedimentation and separation processes, while realizing the recycling or standard discharge of the mother liquor.

[0003] In traditional crystallization equipment or processes, only a single crystallization container may be set up, in which the mother liquor passes through quickly without sufficient time for the crystals to grow and settle. For example, in some simple crystallization tanks, the mother liquor may only travel a short path and a short time from feed to discharge, resulting in incomplete crystal growth and poor settling effect. Moreover, traditional settling equipment lacks effective designs to improve settling efficiency. For example, ordinary settling tanks rely solely on gravity to settle the crystals, resulting in a limited settling area and no reasonable guidance for the flow of the crystal slurry, leading to a long settling time and low efficiency.

[0004] Therefore, existing crystallization sedimentation treatment devices suffer from low mother liquor crystallization sedimentation efficiency and insufficient recovery rate. Utility Model Content

[0005] In order to overcome the problems of low mother liquor crystallization sedimentation efficiency and insufficient recovery rate in existing crystallization sedimentation treatment devices, an ammonium tungstate mother liquor crystallization sedimentation treatment device is proposed.

[0006] The technical solution of this utility model is as follows: an ammonium tungstate mother liquor crystallization and sedimentation treatment device, including a support plate; it also includes a crystallization tank and a horizontal spiral centrifuge. The upper end of the support plate is provided with three crystallization tanks, which are connected in series. A spiral guide plate for extending the path of the mother liquor is provided in the crystallization tank. A stirring blade for stirring and preventing sedimentation is provided in the crystallization tank. An inclined plate sedimentation tank is connected to the last crystallization tank. Multiple polypropylene corrugated plate groups are arranged at a 45-degree angle in the inclined plate sedimentation tank. A bottom ultrasonic transducer for preventing crystal caking is provided at the lower end of the inclined plate sedimentation tank. The output end of the inclined plate sedimentation tank is connected to the horizontal spiral centrifuge. A second connecting pipe is fixedly connected to the liquid return end of the horizontal spiral centrifuge. A second water pump is provided on the second connecting pipe. The other end of the second connecting pipe is placed at the upper inlet of the first crystallization tank.

[0007] Preferably, the inner wall of the crystallization tank is fixedly connected to multiple connecting blocks, and the spiral guide plate is fixedly connected to the inner wall of the crystallization tank through multiple connecting blocks.

[0008] Preferably, a heating plate is provided at the lower end of the spiral guide plate, and a temperature sensor is provided at the lower end of the inner wall of the crystallization tank.

[0009] Preferably, the three crystallization tanks are connected sequentially from front to back by guide pipes, and a first water pump is installed above the guide pipes.

[0010] Preferably, a sealing cover is installed at the upper end of the crystallization tank, and a feed frame is opened at the upper end of the sealing cover, with the other end of the guide pipe placed inside the feed frame.

[0011] Preferably, a fixed sleeve is fixedly connected to the upper end of the sealing cover. Two bearings are provided on the inner wall of the fixed sleeve. A motor is provided at the upper end of the fixed sleeve. The output shaft of the motor passes through the fixed sleeve and the bearings and is connected to a rotating rod. A stirring blade is fixedly connected to the lower end of the rotating rod.

[0012] Preferably, the temperatures in the three crystallization tanks, from back to front, are 80℃, 60℃, and 40℃ respectively.

[0013] The beneficial effects of this utility model are as follows: by setting up three crystallization tanks to increase the mother liquor flow time, and by setting up spiral guide plates in the crystallization tanks to extend the mother liquor path and promote crystal growth, the sedimentation efficiency is improved by using inclined plate sedimentation tanks, and after completion, the crystal-liquid separation is circulated by using a horizontal spiral centrifuge, which improves the problem of insufficient mother liquor crystallization sedimentation efficiency and recovery rate. Attached Figure Description

[0014] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;

[0015] Figure 2 The diagram shown is a cross-sectional perspective view of the present invention.

[0016] Figure 3 The diagram shown is a three-dimensional disassembled structural diagram of the crystallization tank of this utility model;

[0017] Figure 4 This utility model is shown. Figure 2 A magnified three-dimensional structural diagram of a portion at point A in the middle;

[0018] Figure 5 This utility model is shown. Figure 2 A magnified three-dimensional structural diagram of part B in the middle.

[0019] The labels in the attached diagram are as follows: 1. Support plate; 2. Crystallization tank; 201. Connecting block; 202. Spiral guide plate; 203. Guide pipe; 204. First water pump; 205. Heating plate; 206. Temperature sensor; 3. Sealing cover; 301. Fixing sleeve; 302. Feed frame; 303. Bearing; 304. Motor; 305. Rotating rod; 306. Stirring blade; 4. Inclined plate settling tank; 401. Polypropylene corrugated plate assembly; 402. Bottom ultrasonic transducer; 5. Horizontal spiral centrifuge; 501. Second connecting pipe; 502. Second water pump. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please see Figures 1-5 This utility model provides an embodiment of an ammonium tungstate mother liquor crystallization and sedimentation treatment device, including a support plate 1; it also includes a crystallization tank 2 and a horizontal spiral centrifuge 5. Three crystallization tanks 2 are arranged on the upper end of the support plate 1, connected in series. Spiral guide plates 202 for extending the mother liquor path are arranged inside each crystallization tank 2. Stirring blades 306 for stirring and preventing sedimentation are also arranged inside each crystallization tank 2. An inclined plate sedimentation tank 4 is connected to the last crystallization tank 2. Multiple polypropylene corrugated plate groups 401 are arranged at a 45-degree angle inside the inclined plate sedimentation tank 4. A bottom ultrasonic transducer 402 for preventing crystal caking is arranged at the lower end of the inclined plate sedimentation tank 4. The output end of the settling tank 4 is connected to a horizontal screw centrifuge 5. The liquid return end of the horizontal screw centrifuge 5 is fixedly connected to a second connecting pipe 501. A second water pump 502 is installed on the second connecting pipe 501. The other end of the second connecting pipe 501 is placed at the upper feed inlet of the first crystallization tank 2. By setting up three crystallization tanks 2, the flow time of the mother liquor is increased. At the same time, a spiral guide plate 202 is set in the crystallization tank 2 to extend the path of the mother liquor and promote crystal growth. Then, the settling efficiency is improved by the inclined plate settling tank 4. After completion, the crystal liquid is separated and circulated by the horizontal screw centrifuge 5, which improves the settling efficiency of the mother liquor crystallization and solves the problem of insufficient recovery rate.

[0022] Please see Figures 1-3In this embodiment, a sealing cover 3 is installed at the upper end of the crystallization tank 2. A feed frame 302 is opened at the upper end of the sealing cover 3. The other end of the guide pipe 203 is placed in the feed frame 302. A fixed sleeve 301 is fixedly connected to the upper end of the sealing cover 3. Two bearings 303 are provided on the inner wall of the fixed sleeve 301. A motor 304 is provided at the upper end of the fixed sleeve 301. The output shaft of the motor 304 passes through the fixed sleeve 301 and the bearings 303 and is connected to a rotating rod 305. A stirring blade 306 is fixedly connected to the lower end of the rotating rod 305. By turning on the motor 304, the motor 304 drives the stirring blade 306 on the rotating rod 305 to rotate at the lower end of the inner wall of the crystallization tank 2, thereby preventing it from sinking to the bottom.

[0023] Please see Figures 1-5 In this embodiment, multiple connecting blocks 201 are fixed to the inner wall of the crystallization tank 2. The spiral guide plate 202 is fixed to the inner wall of the crystallization tank 2 through multiple connecting blocks 201. The outer wall of the spiral guide plate 202 and the inner wall of the crystallization tank 2 maintain a gap through the connection of the connecting blocks 201. A heating plate 205 is provided at the lower end of the spiral guide plate 202. A temperature sensor 206 is provided at the lower end of the inner wall of the crystallization tank 2. The temperature sensor 206 can monitor the temperature in the corresponding crystallization tank 2. The three crystallization tanks 2 are connected from front to back through a guide pipe 203. A first water pump 204 is provided above the guide pipe 203. The first water pump 204 pumps the liquid in the previous crystallization tank 2 to flow. The temperatures in the three crystallization tanks 2 from back to front are 80°C, 60°C, and 40°C, respectively.

[0024] First, by turning on the heating plate 205, the temperature in each crystallization tank 2 is adjusted to a suitable temperature. Then, the mother liquor is placed in the first crystallization tank 2 behind the support plate 1, allowing the liquid to flow into the upper end of the spiral guide plate 202. This extends the path of the mother liquor, thereby optimizing the crystal growth time. Simultaneously, by turning on the motor 304, the stirring blade 306 on the rotating rod 305 rotates at the bottom of the crystallization tank 2 to prevent sedimentation at the bottom of the crystallization tank 2. The mother liquor undergoes sufficient growth through the three crystallization tanks 2, and then flows from the crystallization tank 2 in front of the support plate 1 into the inclined plate settling tank 4. The crystal slurry flows naturally onto the polypropylene corrugated plate assembly 401. The texture of the polypropylene corrugated plate assembly 401 reduces kinetic energy, while the inclined polypropylene corrugated plate assembly 401 increases the settling area, thereby reducing the settling time. Then, the bottom ultrasonic transducer 402 runs for two minutes every thirty minutes to ensure that the crystals flow smoothly into the bottom of the inclined plate settling tank 4. Next, it flows into the horizontal screw centrifuge 5 for feeding. The centrifuged wet crystals are sent to the airflow drying tower by the horizontal screw centrifuge 5. Then, the mother liquor is sent back to the leaching process by the second water pump 502 on the second connecting pipe 501. The pipeline is equipped with an online concentration meter. When the concentration exceeds the standard, it switches to wastewater treatment.

Claims

1. An ammonium tungstate mother liquor crystallization and sedimentation treatment device, comprising a support plate (1); characterized in that: It also includes a crystallization tank (2) and a horizontal spiral centrifuge (5). Three crystallization tanks (2) are provided at the upper end of the support plate (1). The three crystallization tanks (2) are connected in series. A spiral guide plate (202) for extending the path of the mother liquor is provided in the crystallization tank (2). A stirring blade (306) for stirring and preventing sedimentation is provided in the crystallization tank (2). An inclined plate settling tank (4) is connected to the last crystallization tank (2). Multiple polypropylenes are inclined at a 45-degree angle in the inclined plate settling tank (4). The corrugated plate assembly (401) has a bottom ultrasonic transducer (402) at the lower end of the inclined plate settling tank (4) to prevent crystal caking. The output end of the inclined plate settling tank (4) is connected to a horizontal spiral centrifuge (5). The liquid return end of the horizontal spiral centrifuge (5) is fixedly connected to a second connecting pipe (501). A second water pump (502) is installed on the second connecting pipe (501). The other end of the second connecting pipe (501) is placed at the upper feed inlet of the first crystallization tank (2).

2. The ammonium tungstate mother liquor crystallization and sedimentation treatment device according to claim 1, characterized in that: Multiple connecting blocks (201) are fixed to the inner wall of the crystallization tank (2), and the spiral guide plate (202) is fixed to the inner wall of the crystallization tank (2) through multiple connecting blocks (201).

3. The ammonium tungstate mother liquor crystallization and sedimentation treatment device according to claim 1, characterized in that: A heating plate (205) is provided at the lower end of the spiral guide plate (202), and a temperature sensor (206) is provided at the lower end of the inner wall of the crystallization tank (2).

4. The ammonium tungstate mother liquor crystallization and sedimentation treatment device according to claim 1, characterized in that: The three crystallization tanks (2) are connected from front to back by a guide pipe (203), and a first water pump (204) is installed above the guide pipe (203).

5. The ammonium tungstate mother liquor crystallization and sedimentation treatment device according to claim 1, characterized in that: A sealing cover (3) is installed at the upper end of the crystallization tank (2), and a feed frame (302) is opened at the upper end of the sealing cover (3). The other end of the guide pipe (203) is placed in the feed frame (302).

6. The ammonium tungstate mother liquor crystallization and sedimentation treatment device according to claim 5, characterized in that: A fixed sleeve (301) is fixedly connected to the upper end of the sealing cover (3). Two bearings (303) are provided on the inner wall of the fixed sleeve (301). A motor (304) is provided at the upper end of the fixed sleeve (301). The output shaft of the motor (304) passes through the fixed sleeve (301) and the bearings (303) and is connected to a rotating rod (305). A stirring blade (306) is fixedly connected to the lower end of the rotating rod (305).

7. The ammonium tungstate mother liquor crystallization and sedimentation treatment device according to claim 1, characterized in that: The temperatures in the three crystallization tanks (2) from back to front are 80℃, 60℃, and 40℃ respectively.

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