Titanium dioxide waste acid concentration device and concentration process not easy to block

Abstract

The application discloses a titanium dioxide waste acid concentration device and a concentration process, and relates to the technical field of titanium dioxide waste acid concentration. The device comprises a heat exchanger, a flash chamber, an axial flow pump, a crystallization fluidizer, a dilution mixing chamber and a wall-hanging prevention discharging device. The heat exchanger is connected with the flash chamber, the flash chamber is connected with the axial flow pump, the axial flow pump is connected with the crystallization fluidizer, the crystallization fluidizer is connected with the dilution mixing chamber, the dilution mixing chamber is connected with the heat exchanger, the wall-hanging prevention discharging device comprises a filter box, a circulating part, a spraying part and a connecting conveying part, the connecting conveying part is connected between the filter box and the crystallization fluidizer, the filter box is connected with the crystallization fluidizer, a filter screen is arranged in the filter box, one end of the circulating part is connected with the filter box, the other end of the circulating part is inserted into the crystallization fluidizer, the spraying part is arranged on the inner wall of the crystallization fluidizer, and the spraying part is connected with the circulating part. The application can remove the crystallization substance and help reduce the blockage of the titanium dioxide waste acid concentration device.

Description

Technical Field

[0001] This invention relates to the technical field of titanium dioxide waste acid concentration, and in particular to a titanium dioxide waste acid concentration device and concentration process that is not prone to clogging. Background Technology

[0002] The sulfuric acid process is a widely used method for producing titanium dioxide. However, it generates a large amount of waste acid during the production process. In order to save resources and reduce environmental pollution, the waste acid is usually recycled. However, titanium dioxide waste acid usually needs to be concentrated before it can be reused.

[0003] In related technologies, a titanium dioxide waste acid concentration device that is not easily clogged is disclosed, including a heat exchanger. The liquid outlet of the heat exchanger is connected to a flash chamber via a heat exchanger outlet circulation pipe. The upper side of the flash chamber is provided with an evaporation gas outlet, and the bottom is connected to the inlet of an axial flow pump via a central circulation pipe. The central circulation pipe is provided with a concentrated acid liquid outlet. The outlet of the axial flow pump is connected to a crystallizer via a pump outlet circulation pipe. The bottom of the crystallizer is provided with a washing leg. The crystallizer is provided with a liquid outlet and is connected to a dilution mixing chamber via the liquid outlet. The dilution mixing chamber is connected to the liquid inlet of the heat exchanger and is provided with a dilute acid liquid inlet. When the acid solution is fed into the crystallizer from the pump outlet circulation pipe, the acid solution flows downward first. During the flow, larger crystals settle directly into the bottom of the crystallizer, while smaller crystals continue to grow inside the crystallizer. When they grow to a certain weight, they settle under the action of gravity, thus completing the crystallization and separation of soluble salts. After a certain amount of crystals have settled, the switch below the washing leg is opened to discharge the crystals.

[0004] However, some smaller crystals, when growing inside the crystallizer, will adhere to the inner wall of the crystallizer and cannot settle naturally by gravity. Therefore, after long-term operation, more and more crystals will accumulate on the inner wall of the crystallizer, thus clogging the crystallizer. Summary of the Invention

[0005] To reduce the clogging of titanium dioxide waste acid concentration equipment by crystallization, this application provides a titanium dioxide waste acid concentration equipment and concentration process that is not prone to clogging.

[0006] Firstly, this application provides a titanium dioxide waste acid concentration device that is not easily clogged, employing the following technical solution:

[0007] A non-clogging titanium dioxide waste acid concentration device includes a heat exchanger, a flash chamber, an axial flow pump, a crystallization fluidizer, and a dilution mixing chamber. It also includes an anti-wall-attachment feeding device. The outlet of the heat exchanger is connected to the flash chamber, the bottom of the flash chamber is connected to the inlet of the axial flow pump, the outlet of the axial flow pump is connected to the crystallization fluidizer, the outlet of the crystallization fluidizer is connected to the dilution mixing chamber, and the dilution mixing chamber is in communication with the inlet of the heat exchanger. The anti-wall-attachment feeding device includes a filter box, a circulation component, a spray component, and a connecting conveyor. The connecting conveyor is connected between the top of the filter box and the bottom of the crystallization fluidizer. The filter box is in communication with the crystallization fluidizer and contains a filter screen. One end of the circulation component is connected to the filter box, and the other end is inserted into the crystallization fluidizer. The spray component is located on the inner wall of the crystallization fluidizer and is connected to the end of the circulation component away from the filter box.

[0008] By adopting the above technical solution, large-particle crystals in the dilution mixing chamber settle to the bottom, while small-particle crystals adhere to the inner wall of the crystallizer and continue to grow. When it is necessary to clean the crystals on the inner wall of the crystallizer, the connecting conveyor is operated to input the large-particle crystals and liquid from inside the crystallizer into the filter box. The liquid passes through the filter box, and the circulation component pumps the liquid to the spray component. The spray component sprays the liquid onto the inner wall of the crystallizer, thereby washing off the crystals adhering to the inner wall and allowing them to flow into the filter box. Therefore, this application can remove crystals adhering to the inner wall of the crystallizer, helping to reduce the blockage of the titanium dioxide waste acid concentration device by crystals.

[0009] In one specific implementation scheme, the filter box includes a box body, a sealing door, and a locking element. The top of the box body is connected to a connecting conveyor. A circulation port is provided on the inner bottom wall of the box body. The filter screen is provided on the inner wall of the box body. A discharge port is provided on the side wall of the box body. The sealing door is inserted into the discharge port and abuts against the peripheral wall of the discharge port. The locking element is connected between the sealing door and the box body.

[0010] By adopting the above technical solution, when the mixture of crystals and liquid flows into the tank, the liquid passes through the filter screen and flows into the circulation component from the circulation port, while the crystals remain on the filter screen. When the rinsing is finished, the connecting conveyor stops supplying liquid to the filter tank. After the liquid in the filter tank is completely fed into the crystallizer, the locking component is operated to open the sealing door and remove the crystals from the tank for easy rinsing next time.

[0011] In one specific implementation, the locking element includes a latch and a hook, the latch being fixedly connected to the sealing door, and the hook being fixedly connected to the outer side wall of the housing, the latch and the hook engaging.

[0012] By adopting the above technical solution, when the latch and hook engage, the sealing door can be fixed to the box body to prevent liquid leakage. When the latch and hook separate, the sealing door can be removed from the box body for easy removal of the crystals.

[0013] In one specific implementation scheme, the filter box further includes a guide plate, a push plate, and a receiving pipe. The guide plate and the push plate are both located inside the box. The guide plate is connected between the push plate and the sealing door. A guide groove is provided on the inner side wall of the box. The guide plate is inserted into the guide groove and abuts against the groove wall. The push plate abuts against the filter screen and abuts against the inner wall of the box. An extension plate is fixedly connected to the outer bottom wall of the box. A discharge port is provided on the extension plate. The receiving pipe is fixedly connected to the bottom wall of the extension plate and the discharge port is connected to the receiving pipe.

[0014] By adopting the above technical solution, when it is necessary to remove the crystals from the box, the sealing door is pulled out of the box. The guide plate and push plate move synchronously with the sealing door. The guide plate is used for guidance, and the push plate is used for pushing the crystals to move, thereby quickly pushing the crystals out of the box. When the crystals move to the outer plate, they can fall from the discharge port into the receiving channel, and then fall into the container along the receiving channel. Therefore, this application facilitates the collection of crystals.

[0015] In one specific implementation scheme, the circulation component includes a liquid guide pipe, a liquid delivery pipe, a circulation pump, and a control valve. One end of the liquid guide pipe is connected to the bottom wall of the filter box and is in communication with the inside of the filter box. The end of the liquid guide pipe away from the filter box is connected to the inlet of the circulation pump. One end of the liquid delivery pipe is connected to the outlet of the circulation pump. The other end of the liquid delivery pipe is inserted into the crystallizer and connected to the jetting component. A control valve is installed on both the liquid guide pipe and the liquid delivery pipe.

[0016] By adopting the above technical solution, the circulating pump can transport the liquid in the tank to the crystallizer through the liquid guide pipe and the liquid delivery pipe. The liquid delivery can be controlled as needed by the control valve. When the control valve is closed, the liquid can crystallize in the crystallizer to prevent liquid leakage into the filter box. When it is necessary to rinse the crystals in the crystallizer, the control valve can be opened to deliver liquid.

[0017] In one specific implementation, the infusion tubing is connected to a drug delivery tube, and the drug delivery tube is equipped with a drug delivery valve.

[0018] By adopting the above technical solution, when the entire device needs to be cleaned, the cleaning fluid can be circulated by a circulating pump. At the same time, after opening the chemical dosing valve, chemicals can be added through the chemical dosing pipe, which helps to remove scale inside the device and improve the cleaning effect.

[0019] In one specific implementation, the connecting conveyor includes a connecting flange, a docking flange, a connecting pipe, a connecting tube, a discharge valve, a fixing bolt, and a fixing nut. The connecting pipe is connected between the bottom of the crystallizer and the connecting flange, and the connecting pipe is in communication with the interior of the crystallizer. The discharge valve is installed on the connecting pipe. The connecting tube is connected between the top of the filter box and the docking flange. The connecting flange and the docking flange abut against each other. Both the connecting flange and the docking flange are provided with connecting holes. The fixing bolt passes through the connecting holes, and the fixing nut is threaded onto the fixing bolt.

[0020] By adopting the above technical solution, the fixing bolts and nuts can secure the connecting flange and the mating flange together, allowing liquid to enter the filter box along the connecting pipe and the mating pipe, which helps to output the crystals in the crystallizer fluidized bed. The feeding valve can control the feeding time as needed, and when the feeding valve is closed, liquid leakage in the crystallizer can be prevented.

[0021] In one specific implementation, the spraying component includes a ring pipe and spray heads. The ring pipe is fixedly connected to the inner peripheral wall of the crystallizer, and a plurality of spray heads are mounted on the ring pipe. The end of the circulating component away from the filter box is connected to the ring pipe, and the spray heads are connected to the ring pipe and face the inner peripheral wall of the crystallizer.

[0022] By adopting the above technical solution, when the circulation component delivers liquid to the ring pipe, the ring pipe can deliver the liquid to all the spray heads. The spray heads spray the liquid onto the inner peripheral wall of the crystallizer, which can wash away the crystals on the inner peripheral wall of the crystallizer, thus helping to reduce the situation of crystals clogging the device after long-term operation.

[0023] Secondly, this application provides a concentration process using the aforementioned non-clogging titanium dioxide waste acid concentration device, employing the following technical solution:

[0024] A concentration process using the aforementioned non-clogging titanium dioxide waste acid concentration device includes the following steps:

[0025] Titanium dioxide waste acid is fed into the heat exchanger. The waste acid first flows through the heat exchanger and is heated. Then it flows through the flash chamber, where it is evaporated and vented. After venting, a concentrated liquid is obtained.

[0026] Operate the axial flow pump to send the concentrate into the crystallizer for crystallization separation. The dilution mixing chamber sends the supernatant into the heat exchanger for circulation and concentration. The crystals settle to the bottom of the crystallizer.

[0027] When it is necessary to clean the crystals in the crystallizer fluidizer, stop feeding the concentrated liquid into the crystallizer fluidizer, operate the connecting conveyor to feed the solid-liquid mixture inside the crystallizer into the filter box. The liquid passes through the filter screen, and the circulation component transports the liquid to the spraying component. The spraying component sprays the liquid onto the inner peripheral wall of the crystallizer fluidizer. The crystals adhering to the inner peripheral wall of the crystallizer fluidizer flow into the filter box synchronously with the liquid. After the spraying is completed, stop feeding the solid-liquid mixture into the filter box and completely feed the liquid into the crystallizer fluidizer.

[0028] The supernatant is fed into a heat exchanger for circulation and concentration by operating the dilution mixing chamber. The concentrated liquid is then fed into a crystallizer for crystallization and separation by operating the axial flow pump. Once the liquid in the crystallizer is concentrated to an acid solution with a mass concentration of 50%, the acid solution is discharged, completing the concentration process.

[0029] By adopting the above technical solution and process, dilute waste acid can be concentrated to a mass concentration of 50%, and the crystals in the crystallizer can be smoothly washed out, thereby reducing the situation of crystals clogging the device after long-term operation.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. This application can remove crystals adhering to the inner wall of the crystallizer, which helps to reduce the blockage of titanium dioxide waste acid concentration device by crystals;

[0032] 2. The process of this application can both concentrate dilute waste acid to a concentrated acid with a mass concentration of 50% and smoothly clean out the crystals in the crystallizer fluidizer, thereby reducing the situation of crystals clogging the device after long-term operation. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the titanium dioxide waste acid concentration device that is not easily clogged, as described in the embodiments of this application.

[0034] Figure 2 This is a cross-sectional view of a titanium dioxide waste acid concentration device that is not prone to clogging, as described in the embodiments of this application.

[0035] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0036] Figure 4 yes Figure 2 Enlarged view of point B in the middle.

[0037] Figure 5 This is an exploded view of the filter box in an embodiment of this application.

[0038] Figure 6 This is a schematic diagram of the structure of the spraying component in an embodiment of this application.

[0039] Explanation of reference numerals in the attached drawings: 1. Heat exchanger; 2. Flash chamber; 3. Axial flow pump; 4. Crystallizer fluidizer; 5. Dilution mixing chamber; 6. Anti-wall-hanging feeding device; 61. Filter box; 611. Filter screen; 612. Box body; 6121. Guide groove; 6122. Extension plate; 6123. Feed port; 613. Sealing door; 6131. ​​Sealing plate; 6132. Elastic sealing block; 614. Locking element; 6141. Fastener; 6142. Hook; 615. Circulation port; 616. Discharge port; 617. 618. Guide plate; 619. Push plate; 62. Material receiving pipe; 63. Circulation component; 64. Liquid guide pipe; 65. Liquid delivery pipe; 66. Chemical dosing pipe; 67. Chemical dosing valve; 68. Circulation pump; 69. Control valve; 60. Spraying component; 610. Ring pipe; 611. Spray head; 622. Connecting conveyor component; 63. Connecting flange; 641. Connecting hole; 642. Butt flange; 643. Connecting pipe; 644. Butt pipe; 65. Discharge valve; 66. Fixing bolt; 67. Fixing nut. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0041] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0042] This application discloses a titanium dioxide waste acid concentration device that is not prone to clogging.

[0043] Reference Figure 1 and Figure 2 The non-clogging titanium dioxide waste acid concentration device includes a heat exchanger 1, a flash chamber 2, an axial flow pump 3, a crystallization fluidizer 4, a dilution mixing chamber 5, and an anti-wall-attachment feeding device 6. The dilution mixing chamber 5 is installed at the bottom of the heat exchanger 1. The top of the heat exchanger 1 is connected to the flash chamber 2 via a pipe, and the bottom of the flash chamber 2 is connected to the inlet of the axial flow pump 3 via a pipe. The outlet of the axial flow pump 3 is connected to the crystallization fluidizer 4 via a pipe, and the top of the crystallization fluidizer 4 is connected to the bottom of the dilution mixing chamber 5. The anti-wall-attachment feeding device 6 is installed at the bottom of the crystallization fluidizer 4, and its outlet is inserted inside the crystallization fluidizer 4.

[0044] The bottom of heat exchanger 1 is the liquid inlet, and the top is the liquid outlet. Dilute waste acid enters heat exchanger 1 from the bottom and, after being heated, flows from the top to flash chamber 2. In flash chamber 2, the waste acid evaporates and releases steam. The remaining concentrate then flows from the bottom of flash chamber 2 to axial flow pump 3. Axial flow pump 3 transports the concentrate to crystallizer fluidized bed 4. Large crystal particles settle to the bottom of crystallizer fluidized bed 4, while small crystal particles adhere to the inner wall. Dilution mixing chamber 5 transports the supernatant from crystallizer fluidized bed 4 back to heat exchanger 1 for circulating concentration. When crystallizer fluidized bed 4 needs rinsing, anti-wall-attaching feeding device 6 is operated to extract the crystals and liquid from crystallizer fluidized bed 4. After filtration, the liquid is transported back to crystallizer fluidized bed 4 to rinse the crystals on the inner wall.

[0045] Reference Figure 2 and Figure 3 The anti-wall-hanging feeding device 6 includes a filter box 61, a circulation component 62, a spray component 63, and a connecting conveyor 64. The connecting conveyor 64 is installed at the bottom of the crystallizer 4 and is connected to the top wall of the filter box 61. One end of the circulation component 62 is connected to the bottom wall of the filter box 61, and the other end of the circulation component 62 is inserted into the crystallizer 4. The spray component 63 is installed on the inner peripheral wall of the crystallizer 4, and the circulation component 62 and the spray component 63 are connected.

[0046] Reference Figure 2 and Figure 3 The connecting conveyor 64 includes a connecting flange 641, a docking flange 642, a connecting pipe 643, a connecting tube 644, a discharge valve 645, fixing bolts 646, and fixing nuts 647. The top end of the connecting pipe 643 is welded to the bottom end of the crystallizer 4, and the connecting pipe 643 is connected to the crystallizer 4. The connecting flange 641 is welded to the bottom end of the connecting pipe 643, and the discharge valve 645 is installed on the connecting pipe 643. The bottom end of the connecting tube 644 is welded to the top wall of the filter box 61, and the connecting tube 644 is connected to the inside of the filter box 61. The docking flange 642 is welded to the top end of the connecting tube 644, and the docking flange 642 abuts against the connecting flange 641. Both the connecting flange 641 and the docking flange 642 are provided with connecting holes 6411, and the connecting holes 6411 on the connecting flange 641 are opposite to the connecting holes 6411 on the docking flange 642. The fixing bolt 646 is inserted into the connecting hole 6411 and abuts against the hole wall of the connecting hole 6411. The fixing nut 647 is threaded to both ends of the fixing bolt 646. The connecting flange 641 and the mating flange 642 abut against the fixing nut 647.

[0047] Reference Figure 4 and Figure 5The filter box 61 includes a box body 612, a sealing door 613, a locking element 614, a guide plate 617, a push plate 618, and a receiving pipe 619. The bottom end of the connecting pipe 644 is welded to the top end of the box body 612, and the connecting pipe 644 is connected to the interior of the box body 612. The box body 612 is a rectangular box, and a filter screen 611 is installed inside the box body 612. The filter screen 611 is welded to the inner bottom wall of the box body 612. A circulation port 615 is provided on the bottom wall of the box body 612. A circulation element 62 is connected to the outer bottom wall of the box body 612, and the circulation port 615 is connected to the circulation element 62. The sealing door 613 includes a sealing plate 6131 and an elastic sealing block 6132. The elastic sealing block 6132 is glued to the sealing plate 6131. ​​One end of the guide plate 617 is welded to the sealing plate 6131, and the other end of the guide plate 617 is welded to the push plate 618. The push plate 618 is arranged parallel to the sealing plate 6131.

[0048] A discharge port 616 is provided on one side wall of the housing 612, and a guide groove 6121 is provided on the inner side wall of the housing 612. One end of the guide groove 6121 is connected to the discharge port 616. A guide plate 617 is inserted into the guide groove 6121 and abuts against the groove wall. A push plate 618 is located inside the housing 612 and abuts against the inner top wall and inner side wall of the housing 612. The lower end of the bottom plate abuts against the filter screen 611.

[0049] An elastic sealing block 6132 is inserted into the discharge port 616 and abuts against the peripheral wall of the discharge port 616. The sealing plate 6131 abuts against the outer wall of the housing 612. An extension plate 6122 is welded to the outer bottom wall of the housing 612. The extension plate 6122 is located below the sealing plate 6131. ​​A discharge port 6123 is provided on the extension plate 6122. A receiving pipe 619 is welded to the bottom wall of the extension plate 6122 and is opposite to the discharge port 6123.

[0050] There are several locking components 614, which are installed sequentially on the sealing plate 6131 along the circumference of the sealing plate 6131. ​​Each locking component 614 includes a buckle 6141 and a hook 6142. The buckle 6141 is riveted to the sealing plate 6131, and the hook 6142 is riveted to the housing 612. The buckle 6141 and the hook 6142 are engaged.

[0051] The circulation component 62 includes a liquid guide pipe 621, a liquid delivery pipe 622, a circulation pump 623, and a control valve 624. One end of the liquid guide pipe 621 is welded to the outer bottom wall of the housing 612, and the other end of the liquid guide pipe 621 is inserted into the inlet of the circulation pump 623. The circulation port 615 is opposite to the liquid guide pipe 621. One end of the liquid delivery pipe 622 is inserted into the outlet of the circulation pump 623, and the other end of the liquid delivery pipe 622 passes through the peripheral wall of the crystallizer 4 and is inserted into the crystallizer 4. The outer wall of the liquid delivery pipe 622 is welded to the crystallizer 4. A control valve 624 is installed on both the liquid guide pipe 621 and the liquid delivery pipe 622.

[0052] Reference Figure 2 and Figure 6 An infusion tube 622 is welded to a drug dosing tube 6221, and a drug dosing valve 6222 is installed on the drug dosing tube 6221.

[0053] The injection component 63 includes a ring pipe 631 and injection heads 632. The ring pipe 631 is an annular pipe located at the top inside the crystallizer fluidizer 4 and is welded to the inner circumferential wall of the crystallizer fluidizer 4. Several injection heads 632 are arranged sequentially along the circumference of the ring pipe 631, communicating with it and facing the inner circumferential wall of the crystallizer fluidizer 4. One end of the infusion tube 622, inserted into the crystallizer fluidizer 4, is welded to and communicates with the ring pipe 631.

[0054] This application also discloses a concentration process using a non-clogging titanium dioxide waste acid concentration device, comprising the following steps:

[0055] Titanium dioxide waste acid is fed into heat exchanger 1. The waste acid flows from the bottom to the top of heat exchanger 1 and is heated. Then it flows through flash chamber 2, where it is evaporated and vented. After venting, a concentrated liquid is obtained.

[0056] Operate the axial flow pump 3 to send the concentrated liquid in the flash chamber 2 into the crystallizer fluidizer 4. The concentrated liquid crystallizes in the crystallizer fluidizer 4. Large crystal particles settle at the bottom of the crystallizer fluidizer 4, while small crystal particles adhere to the inner peripheral wall of the crystallizer fluidizer 4. The liquid forms a supernatant at the top of the crystallizer fluidizer 4. Operate the dilution mixing chamber 5 to send the supernatant into the heat exchanger 1 for circulation and concentration.

[0057] When it is necessary to clean the crystals in the crystallizer fluidizer 4, operate the dilution mixing chamber 5 to stop feeding the concentrated liquid into the crystallizer fluidizer 4, and then open the feed valve 645 and control valve 624 to feed the solid-liquid mixture at the bottom of the crystallizer fluidizer 4 into the filter box 61. The liquid passes through the filter screen 611, and the circulation pump 623 delivers the liquid to the ring pipe 631. The spray head 632 sprays the liquid onto the inner peripheral wall of the crystallizer fluidizer 4, and the liquid washes down the crystals on the inner peripheral wall of the crystallizer fluidizer 4. The crystals and liquid flow into the filter box 61 simultaneously. After the spraying is completed, close the feed valve 645 and control valve 624 to stop feeding the solid-liquid mixture into the box 612 and completely feed the liquid in the box 612 into the crystallizer fluidizer 4.

[0058] Then, operate the dilution mixing chamber 5 to send the supernatant into the heat exchanger 1 for circulation concentration. Operate the axial flow pump 3 to send the concentrated liquid into the crystallizer fluidizer 4 for crystallization separation. After the liquid in the crystallizer fluidizer 4 is concentrated to an acid solution with a mass concentration of 50%, the acid solution is discharged to complete the concentration.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A non-clogging titanium dioxide waste acid concentration device, comprising a heat exchanger (1), a flash chamber (2), an axial flow pump (3), a crystallization fluidizer (4), and a dilution mixing chamber (5), characterized in that, It also includes an anti-wall-hanging feeding device (6), the liquid outlet of the heat exchanger (1) is connected to the flash chamber (2), the bottom of the flash chamber (2) is connected to the liquid inlet of the axial flow pump (3), the liquid outlet of the axial flow pump (3) is connected to the crystallizing fluidizer (4), the liquid outlet of the crystallizing fluidizer (4) is connected to the dilution mixing chamber (5), the dilution mixing chamber (5) is connected to the liquid inlet of the heat exchanger (1), the anti-wall-hanging feeding device (6) includes a filter box (61), a circulation component (62), a spray component (63) and a connecting conveyor component (64), the... The connecting conveyor (64) is connected between the top of the filter box (61) and the bottom of the crystallizer (4). The filter box (61) is connected to the crystallizer (4). The filter box (61) is provided with a filter screen (611). One end of the circulation component (62) is connected to the bottom wall of the filter box (61). The other end of the circulation component (62) is inserted into the crystallizer (4). The spray component (63) is provided on the inner wall of the crystallizer (4). The spray component (63) is connected to the end of the circulation component (62) away from the filter box (61). The filter box (61) includes a box body (612), a sealing door (613), a guide plate (617), a push plate (618), and a receiving pipe (619). The top of the box body (612) is connected to the connecting conveyor (64). A circulation port (615) is provided on the inner bottom wall of the box body (612). The filter screen (611) is provided on the inner wall of the box body (612). A discharge port (616) is provided on the side wall of the box body (612). The sealing door (613) is inserted into the discharge port (616) and abuts against the peripheral wall of the discharge port (616). The guide plate (617) and the push plate (618) are both located inside the box body (612). The guide plate (617) is connected to the push plate. Between (618) and the sealing door (613), a guide groove (6121) is provided on the inner side wall of the box (612), the guide plate (617) is inserted into the guide groove (6121), the guide plate (617) abuts against the groove wall of the guide groove (6121), the push plate (618) abuts against the filter screen (611), the push plate (618) abuts against the inner wall of the box (612), an extension plate (6122) is fixedly connected to the outer bottom wall of the box (612), a discharge port (6123) is provided on the extension plate (6122), and a receiving pipe (619) is fixedly connected to the bottom wall of the extension plate (6122), and the discharge port (6123) is connected to the receiving pipe (619).

2. The titanium dioxide waste acid concentration device that is not prone to clogging according to claim 1, characterized in that: The filter box (61) also includes a locking element (614) connected between the sealing door (613) and the box body (612).

3. The titanium dioxide waste acid concentration device that is not prone to clogging according to claim 2, characterized in that: The locking element (614) includes a buckle (6141) and a hook (6142). The buckle (6141) is fixedly connected to the blocking door (613), and the hook (6142) is fixedly connected to the outer wall of the box (612). The buckle (6141) and the hook (6142) engage.

4. The titanium dioxide waste acid concentration device that is not prone to clogging according to claim 1, characterized in that: The circulation component (62) includes a liquid guide pipe (621), a liquid delivery pipe (622), a circulation pump (623), and a control valve (624). One end of the liquid guide pipe (621) is connected to the bottom wall of the filter box (61) and is in communication with the inside of the filter box (61). The end of the liquid guide pipe (621) away from the filter box (61) is connected to the inlet end of the circulation pump (623). One end of the liquid delivery pipe (622) is connected to the outlet end of the circulation pump (623). The other end of the liquid delivery pipe (622) is inserted into the crystallizer fluidizer (4) and connected to the jetting component (63). A control valve (624) is installed on both the liquid guide pipe (621) and the liquid delivery pipe (622).

5. The titanium dioxide waste acid concentration device that is not prone to clogging according to claim 4, characterized in that: The infusion tube (622) is connected to a drug dosing tube (6221), and a drug dosing valve (6222) is installed on the drug dosing tube (6221).

6. The titanium dioxide waste acid concentration device that is not prone to clogging according to claim 1, characterized in that: The connecting conveyor (64) includes a connecting flange (641), a docking flange (642), a connecting pipe (643), a connecting tube (644), a discharge valve (645), a fixing bolt (646), and a fixing nut (647). The connecting pipe (643) is connected between the bottom of the crystallizer (4) and the connecting flange (641). The connecting pipe (643) is connected to the inside of the crystallizer (4). The discharge valve (645) is installed on the connecting pipe (643). The connecting tube (644) is connected between the top of the filter box (61) and the docking flange (642). The connecting flange (641) and the docking flange (642) abut against each other. Both the connecting flange (641) and the docking flange (642) are provided with connecting holes (6411). The fixing bolt (646) passes through the connecting hole (6411). The fixing nut (647) is threaded onto the fixing bolt (646).

7. The titanium dioxide waste acid concentration device that is not prone to clogging according to claim 1, characterized in that: The spraying component (63) includes a ring pipe (631) and a spray head (632). The ring pipe (631) is fixedly connected to the inner peripheral wall of the crystallizer (4). Several spray heads (632) are installed on the ring pipe (631). The end of the circulating component (62) away from the filter box (61) is connected to the ring pipe (631). The spray head (632) is connected to the ring pipe (631) and faces the inner peripheral wall of the crystallizer (4).

8. A concentration process using the non-clogging titanium dioxide waste acid concentration device according to any one of claims 1-7, characterized in that, Includes the following steps: Titanium dioxide waste acid is fed into heat exchanger (1). The titanium dioxide waste acid first flows through heat exchanger (1), is heated, and then flows through flash chamber (2). Evaporation and exhaust are carried out in flash chamber (2). After exhaust, concentrated liquid is obtained. Operate the axial flow pump (3) to send the concentrate into the crystallizer fluidizer (4) for crystallization separation. The dilution mixing chamber (5) sends the supernatant into the heat exchanger (1) for circulation concentration. The crystals settle to the bottom of the crystallizer fluidizer (4). When it is necessary to clean the crystals in the crystallizer fluidizer (4), stop feeding the concentrated liquid into the crystallizer fluidizer (4), operate the connecting conveyor (64), and feed the solid-liquid mixture inside the crystallizer fluidizer (4) into the filter box (61). The liquid passes through the filter screen (611), and the circulation component (62) transports the liquid to the spray component (63). The spray component (63) sprays the liquid onto the inner wall of the crystallizer fluidizer (4). The crystals adhering to the inner wall of the crystallizer fluidizer (4) flow into the filter box (61) synchronously with the liquid. After the spraying is completed, stop feeding the solid-liquid mixture into the filter box (61) and feed the liquid completely into the crystallizer fluidizer (4). The supernatant is sent to the heat exchanger (1) through the dilution mixing chamber (5) for circulation concentration. The concentrated liquid is sent to the crystallizer fluidizer (4) through the axial flow pump (3) for crystallization separation. After the liquid in the crystallizer fluidizer (4) is concentrated to an acid solution with a mass concentration of 50%, the acid solution is discharged to complete the concentration.

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