Titanium white waste acid flash evaporation crystallizing tank

Abstract

The utility model provides a titanium dioxide waste acid flash evaporation crystallizing tank, which belongs to the technical field of titanium dioxide processing, and comprises a pipe body and further comprises a water tank, the separation structure comprises a first discharging pipe fixed to the bottom end of the pipe body, a fine filter screen installed on one side of the first discharging pipe, an internal electromagnetic valve installed at the bottom end of the water retaining shell and a pushing assembly arranged in the first discharging pipe. According to the utility model, the rotating shaft is driven by the driving motor to rotate, so that the spiral blade shaft pushes crystals to the inside of the second discharging pipe and extrudes the crystals, waste acid in the crystals is extruded out and penetrates through the fine filter screen, and the second discharging pipe can be opened and the crystals can be discharged by rotating the fixing bolt to push the sealing cover to turn over; therefore, the crystal separation function of the device is achieved, crystals and waste acid are conveniently separated, the waste acid is conveniently recycled, meanwhile, the staying time of the crystals in the waste acid is shortened, the recovery rate of the crystals is increased, and the high efficiency of the device is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of titanium dioxide processing, in particular to a titanium dioxide waste acid flash crystallization tank. Background Art

[0002] Titanium dioxide is an important inorganic chemical pigment, the main component of which is titanium dioxide. There are two production processes for titanium dioxide: sulfuric acid process and chlorination process. It has important uses in industries such as coatings, inks, papermaking, plastics and rubber, chemical fibers, and ceramics. During the production process of titanium dioxide, in order to facilitate the recovery of titanium dioxide in waste acid, it is necessary to use a titanium dioxide waste acid flash crystallization tank to reduce the water content in the waste acid and improve the crystallization efficiency of the solute.

[0003] After searching, the Chinese patent application number 201610627590.X discloses a titanium dioxide waste acid flash crystallization tank, which is composed of a slag outlet pipe, a tank body, a baffle, a waste acid circulation outlet pipe, a hot waste acid inlet pipe, a steam outlet pipe, a wire mesh demister, a nozzle, a liquid collector, a baffle, and a concentrated waste acid outlet pipe. A slag outlet pipe is arranged at the bottom of the tank body to connect with the slag liquid conveying pipe; a nozzle is arranged on the center line of the tank body, and the nozzle is connected with the hot waste acid inlet pipe; and a nozzle is arranged below the nozzle. A conical liquid collector is installed at the bottom to collect the waste acid flowing down and send it to the bottom of the tank; a conical baffle is installed at the pipe mouth of the conical liquid collector; the hot waste acid inlet pipe is connected to the hot waste acid delivery pipe; a baffle is installed at the lower part of the tank body; a waste acid circulation outlet pipe is installed at the lower part of the tank body and connected to the waste acid circulation pipe; a concentrated waste acid outlet pipe is installed at the lower part of the tank body and connected to the concentrated waste acid delivery pipe; a wire mesh demister is installed in the upper part of the tank body to separate the liquid foam entrained by the rising steam flow; a steam outlet pipe is set at the top of the tank body. It has the advantages of high evaporation efficiency, simple structure, reliable operation, and easy installation;

[0004] The above patent still has the following deficiencies: (1) It is not convenient to separate the crystals from the waste acid. After the crystals are precipitated in the waste acid, they settle at the bottom of the tank and mix with the waste acid. Therefore, the crystals discharged from the device contain a large amount of waste acid liquid. It is necessary to use relevant equipment to separate the crystals from the waste acid, which increases the working steps and reduces the working efficiency.

[0005] (2) Crystals tend to adhere to the inside of the device. Since crystals need to be left to settle for a long time, they tend to adhere to the inside of the device and are difficult to be discharged, which increases the operating burden of the equipment.

[0006] Therefore, a titanium dioxide waste acid flash crystallization tank is urgently needed to solve the above problems. Utility Model Content

[0007] The utility model aims to solve the problem that it is inconvenient to separate crystals from waste acid at present. After crystals are precipitated in waste acid, they are deposited at the bottom of the tank and mixed with the waste acid, so that the crystals discharged from the device contain a large amount of waste acid liquid. It is necessary to use relevant equipment to separate the crystals from the waste acid, which increases the working steps and reduces the working efficiency.

[0008] In order to achieve the above-mentioned invention object, the utility model provides the following technical solutions:

[0009] A titanium dioxide waste acid flash crystallization tank, comprising a tube body, and also comprising:

[0010] A pressure relief pipe is fixed to one side of the top of the pipe body, an exhaust hole is fixed to the top of the pipe body, and a pressure gauge is installed on the other side of the top of the pipe body;

[0011] A first liquid discharge port is fixed at the bottom end of one side of the tube body, and a second liquid discharge port is fixed at the bottom end of the other side of the tube body;

[0012] A demister is installed at the top of the tube body, and a dispersion plate is installed at the bottom of the demister;

[0013] A nozzle is installed inside the pipe body, and a connecting pipe is connected to the top of the nozzle;

[0014] A baffle is fixed inside the tube body, and a separation net is fixed outside the baffle;

[0015] A cleaning structure, arranged inside the baffle, for cleaning the crystals inside the device;

[0016] A separation structure is arranged at the bottom end of the tube body, wherein the separation structure includes a first discharge pipe fixed at the bottom end of the tube body, a fine filter installed on one side of the first discharge pipe, a second discharge pipe fixed on one side of the fine filter, a cover rotatably connected to one side of the second discharge pipe, a fixing bolt inserted inside the cover and connected to the second discharge pipe, a water retaining shell sleeved on the outside of the fine filter and connected to the first discharge pipe and the second discharge pipe, an internal solenoid valve installed at the bottom end of the water retaining shell, and a pushing assembly arranged inside the first discharge pipe.

[0017] As a preferred technical solution of the present application, the pushing assembly includes a driving motor installed on one side of the first discharge pipe, a rotating shaft rotatably connected to the inside of the first discharge pipe and connected to the rotating end of the driving motor, and a spiral blade shaft fixed on the outside of the rotating shaft.

[0018] Through the above technical solution, the driving motor drives the rotating shaft to rotate, so that the spiral blade shaft pushes the crystals into the inside of the second discharge pipe and squeezes the crystals, squeezes out the waste acid inside the crystals and passes through the fine filter screen, and the second discharge pipe can be opened by rotating the fixing bolt to push the cover to flip and discharge the crystals.

[0019] As a preferred technical solution of the present application, the rotating shaft and the spiral blade shaft are welded into an integrated structure, and the first discharge pipe and the second discharge pipe are located on the same horizontal center line.

[0020] With the above technical solution, since the first discharge pipe and the second discharge pipe are located on the same horizontal center line, the spiral blade shaft is not prone to friction with the inside of the second discharge pipe during rotation.

[0021] As a preferred technical solution of the present application, a plug-in structure is formed between the rotating shaft and the sealing cover, and a rotating structure is formed between the sealing cover and the second discharge pipe.

[0022] Through the above technical solution, the rotating shaft is inserted into the interior of the cover, so that the cover can support one end of the rotating shaft, making the rotating shaft difficult to bend.

[0023] As a preferred technical solution of the present application, the cleaning structure includes a support frame installed inside the baffle, a rotating frame rotatably connected to the support frame, a first scraper fixed on both sides of the rotating frame, a second scraper fixed on the top of both sides of the rotating frame, a protective shell fixed inside the first discharge pipe, a second bevel gear installed at the bottom end of the rotating frame, and a first bevel gear fixed on the outside of the rotating shaft and meshing with the second bevel gear.

[0024] Through the above technical solution, the rotating frame is driven to rotate through the rotating shaft through the first bevel gear and the second bevel gear, and then the rotating frame drives the second scraper and the first scraper to rotate, scraping off the crystals inside the tube body and the baffle, while facilitating the crystals to enter the first discharge pipe.

[0025] As a preferred technical solution of the present application, the first scrapers are symmetrically distributed on the vertical center line of the rotating frame, and the rotating frame extends to the inside of the protective shell and is connected to the second bevel gear.

[0026] Through the above technical solution, the rotating frame can rotate smoothly through the left and right groups of first scrapers and is not prone to tilting or shaking.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] In the scheme of this application:

[0029] 1. The driving motor drives the rotating shaft to rotate, so that the spiral blade shaft pushes the crystals into the second discharge pipe and squeezes the crystals, squeezes out the waste acid inside the crystals and passes through the fine filter, and the second discharge pipe can be opened by rotating the fixing bolt to push the cover to flip and discharge the crystals, thereby realizing the crystal separation function of the device, facilitating the separation of crystals from waste acid, so as to facilitate the recycling of waste acid, and at the same time reducing the time the crystals stay in the waste acid, improving the recovery rate of the crystals, and enhancing the efficiency of the device;

[0030] 2. The rotating frame is driven to rotate through the rotating shaft via the first bevel gear and the second bevel gear, and then the rotating frame drives the second scraper and the first scraper to rotate, so as to scrape off the crystals inside the tube body and the baffle, and at the same time facilitate the crystals to enter the first discharge pipe, thereby realizing the inner wall cleaning function of the device, facilitating the cleaning of the crystals attached to the inside of the device, making it easy to discharge the crystals and reducing the burden on the operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is one of the schematic diagrams of the structure of the utility model;

[0032] Figure 2 This is the second schematic diagram of the structure of the utility model;

[0033] Figure 3 A schematic diagram of the three-dimensional structure of the separation structure provided in this application;

[0034] Figure 4 A schematic diagram of a three-dimensional cross-sectional structure of a separation structure provided in this application;

[0035] Figure 5 Provided for this application Figure 4 Schematic diagram of the enlarged structure of the local section at point A in the middle.

[0036] Markings in the figure: 1. Tube body; 2. Pressure relief pipe; 3. Exhaust hole; 4. Pressure gauge; 5. First discharge port; 6. Separation structure; 601. Water retaining shell; 602. Solenoid valve; 603. First discharge pipe; 604. Drive motor; 605. Second discharge pipe; 606. Sealing cover; 607. Fixing bolt; 608. Spiral blade shaft; 609. Fine filter; 610. Rotating shaft; 7. Cleaning structure; 701. First scraper; 702. Second scraper; 703. Rotating frame; 704. Support frame; 705. First bevel gear; 706. Protective shell; 707. Second bevel gear; 8. Second discharge port; 9. Baffle; 10. Dispersion plate; 11. Demister; 12. Nozzle; 13. Connecting pipe; 14. Separation net. DETAILED DESCRIPTION

[0037] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.

[0038] like Figure 1-5 As shown, a titanium dioxide waste acid flash crystallization tank proposed in this embodiment includes a pipe body 1, and also includes:

[0039] A pressure relief pipe 2 is fixed to one side of the top of the pipe body 1, an exhaust hole 3 is fixed to the top of the pipe body 1, and a pressure gauge 4 is installed on the other side of the top of the pipe body 1;

[0040] A first liquid discharge port 5 is fixed at the bottom end of one side of the tube body 1, and a second liquid discharge port 8 is fixed at the bottom end of the other side of the tube body 1;

[0041] The demister 11 is installed at the top of the tube body 1, and the bottom of the demister 11 is installed with a dispersion plate 10;

[0042] The nozzle 12 is installed inside the pipe body 1, and the top of the nozzle 12 is connected to a connecting pipe 13;

[0043] The baffle plate 9 is fixed inside the tube body 1, and a separation net 14 is fixed outside the baffle plate 9;

[0044] A cleaning structure 7, arranged inside the baffle 9, is used to clean the crystals inside the device;

[0045] The separation structure 6 is arranged at the bottom end of the tube body 1, wherein the separation structure 6 includes a first discharge pipe 603 fixed at the bottom end of the tube body 1, a fine filter 609 installed on one side of the first discharge pipe 603, a second discharge pipe 605 fixed on one side of the fine filter 609, a cover 606 rotatably connected to one side of the second discharge pipe 605, a fixing bolt 607 inserted inside the cover 606 and connected to the second discharge pipe 605, a water retaining shell 601 sleeved on the outside of the fine filter 609 and connected to the first discharge pipe 603 and the second discharge pipe 605, an internal solenoid valve 602 installed at the bottom end of the water retaining shell 601, and a pushing assembly arranged inside the first discharge pipe 603.

[0046] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, as a preferred embodiment, on the basis of the above method, further, the pushing assembly includes a driving motor 604 installed on one side of the first discharge pipe 603, a rotating shaft 610 rotatably connected to the inside of the first discharge pipe 603 and connected to the rotating end of the driving motor 604, and a spiral blade shaft 608 fixed to the outside of the rotating shaft 610, the rotating shaft 610 and the spiral blade shaft 608 are welded into an integrated structure, the first discharge pipe 603 and the second discharge pipe 605 are located on the same horizontal center line, a plug-in structure is formed between the rotating shaft 610 and the cover 606, and a rotating structure is formed between the cover 606 and the second discharge pipe 605, the waste acid inside the tube body 1 is concentrated through the first discharge pipe 603, and the driving is started The rotation of the motor 604 drives the rotating shaft 610 to rotate, so that the rotating shaft 610 pushes the crystals to the inside of the second discharge pipe 605 through the spiral blade shaft 608, and the crystals move on the top of the fine filter 609, so that the waste acid passes through the fine filter 609 and enters the inside of the water retaining shell 601. The solenoid valve 602 can be opened to discharge the waste liquid inside the water retaining shell 601. When the crystals enter the inside of the second discharge pipe 605, as the spiral blade shaft 608 continues to rotate, the spiral blade shaft 608 squeezes the crystals, squeezes out the waste acid inside the crystals, and accelerates the separation of the waste acid. The second discharge pipe 605 is separated by rotating the fixing bolt 607, and the second discharge pipe 605 is opened by pushing the cover 606 to flip downward to discharge the crystals inside the device.

[0047] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the cleaning structure 7 includes a support frame 704 installed inside the baffle 9, a rotating frame 703 rotatably connected to the inside of the support frame 704, a first scraper 701 fixed on both sides of the rotating frame 703, a second scraper 702 fixed on the top of both sides of the rotating frame 703, a protective shell 706 fixed inside the first discharge pipe 603, a second bevel gear 707 installed at the bottom end of the rotating frame 703, and a first bevel gear 705 fixed on the outside of the rotating shaft 610 and meshing with the second bevel gear 707. The first scraper 701 rotates The rotating frame 703 is symmetrically distributed on the vertical center line of the frame 703. The rotating frame 703 extends to the interior of the protective shell 706 and is connected to the second bevel gear 707. The first bevel gear 705 is driven to rotate through the rotating shaft 610, so that the first bevel gear 705 drives the rotating frame 703 to rotate through the second bevel gear 707. Then the rotating frame 703 drives the second scraper 702 and the first scraper 701 to rotate inside the device to scrape off the crystals inside the tube body 1 and the baffle 9 to prevent the crystals from adhering and fixing, and at the same time facilitates the crystals to enter the interior of the first discharge pipe 603 for discharge. The rotating frame 703 is supported by the support frame 704.

[0048] Specifically, when the titanium dioxide waste acid flash crystallization tank is in use: by introducing high-temperature and high-pressure waste acid into the interior of the connecting pipe 13, the waste acid is sprayed out through the nozzle 12, and then the water in the waste acid evaporates quickly, so that crystals in the waste acid are precipitated, and the equipment is used to extract the steam inside the tube body 1 through the exhaust hole 3, and at the same time, the air pressure inside the tube body 1 is increased to facilitate the evaporation of the waste acid, and the droplets in the water vapor are separated by the demister 11. After the waste acid is sprayed, it drips downward through the holes on the surface of the dispersion plate 10, thereby increasing the contact area between the waste acid and the air and accelerating the evaporation effect, and then the baffle 9 introduces the waste acid and crystals into the bottom of the tube body 1, and through static precipitation, the crystals are precipitated into the interior of the separation structure 6, and the low-concentration waste acid is discharged through the second drain port 8, and the high-concentration waste acid is discharged through the first drain port 5 for re-evaporation, and the crystals are separated from the waste liquid through the separation structure 6, and the crystals inside the device are cleaned by the cleaning structure 7.

[0049] The waste acid inside the tube body 1 is concentrated through the first discharge pipe 603, and the driving motor 604 is started to rotate to drive the rotating shaft 610 to rotate, so that the rotating shaft 610 pushes the crystals to the inside of the second discharge pipe 605 through the spiral blade shaft 608, so that the crystals move on the top of the fine filter 609, and the waste acid passes through the fine filter 609 into the inside of the water retaining shell 601, and the electromagnetic valve 602 can be opened to discharge the waste liquid inside the water retaining shell 601. When the crystals enter the inside of the second discharge pipe 605, as the spiral blade shaft 608 continues to rotate, the spiral blade shaft 608 squeezes the crystals, squeezes out the waste acid inside the crystals, and accelerates the separation of the waste acid. The second discharge pipe 605 is separated by rotating the fixing bolt 607, and the second discharge pipe 605 is opened by pushing the cover 606 to flip downward, and the crystals inside the device are discharged;

[0050] The first bevel gear 705 is driven to rotate by the rotating shaft 610, so that the first bevel gear 705 drives the rotating frame 703 to rotate through the second bevel gear 707, and then the rotating frame 703 drives the second scraper 702 and the first scraper 701 to rotate inside the device, scraping off the crystals inside the tube body 1 and the baffle 9 to prevent the crystals from adhering and fixing, and at the same time facilitating the crystals to enter the first discharge pipe 603 for discharge, and the rotating frame 703 is supported by the support frame 704.

[0051] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A titanium dioxide waste acid flash crystallization tank, comprising a tube body (1), characterized in that: Also includes, A pressure relief pipe (2) is fixed to one side of the top end of the pipe body (1); an exhaust hole (3) is fixed to the top end of the pipe body (1); and a pressure gauge (4) is installed on the other side of the top end of the pipe body (1); A first liquid discharge port (5) is fixed to the bottom end of one side of the tube body (1), and a second liquid discharge port (8) is fixed to the bottom end of the other side of the tube body (1); A demister (11) is installed at the top end of the tube body (1), and a dispersion plate (10) is installed at the bottom end of the demister (11); A nozzle (12) is installed inside the pipe body (1), and the top end of the nozzle (12) is connected to a connecting pipe (13); A baffle (9) is fixed inside the tube body (1), and a separation net (14) is fixed outside the baffle (9); A cleaning structure (7) is arranged inside the baffle (9) and is used to clean the crystals inside the device; A separation structure (6) is arranged at the bottom end of the tube body (1), wherein the separation structure (6) comprises a first discharge pipe (603) fixed at the bottom end of the tube body (1), a fine filter (609) installed on one side of the first discharge pipe (603), a second discharge pipe (605) fixed on one side of the fine filter (609), a cover (606) rotatably connected to one side of the second discharge pipe (605), a fixing bolt (607) inserted inside the cover (606) and connected to the second discharge pipe (605), a water retaining shell (601) sleeved on the outside of the fine filter (609) and connected to the first discharge pipe (603) and the second discharge pipe (605), an internal solenoid valve (602) installed at the bottom end of the water retaining shell (601), and a pushing assembly arranged inside the first discharge pipe (603).

2. A titanium dioxide waste acid flash crystallization tank according to claim 1, characterized in that: The pusher assembly comprises a drive motor (604) mounted on one side of a first discharge pipe (603), a rotating shaft (610) rotatably connected to the inside of the first discharge pipe (603) and connected to the rotating end of the drive motor (604), and a spiral blade shaft (608) fixed to the outside of the rotating shaft (610).

3. A titanium dioxide waste acid flash crystallization tank according to claim 2, characterized in that: The rotating shaft (610) and the spiral blade shaft (608) are welded into an integrated structure, and the first discharge pipe (603) and the second discharge pipe (605) are located on the same horizontal center line.

4. A titanium dioxide waste acid flash crystallization tank according to claim 2, characterized in that: A plug-in structure is formed between the rotating shaft (610) and the sealing cover (606), and a rotating structure is formed between the sealing cover (606) and the second discharge pipe (605).

5. A titanium dioxide waste acid flash crystallization tank according to claim 1, characterized in that: The cleaning structure (7) comprises a support frame (704) installed inside the baffle (9), a rotating frame (703) rotatably connected to the inside of the support frame (704), a first scraper (701) fixed on both sides of the rotating frame (703), a second scraper (702) fixed on the top of both sides of the rotating frame (703), a protective shell (706) fixed inside the first discharge pipe (603), a second bevel gear (707) installed at the bottom end of the rotating frame (703), and a first bevel gear (705) fixed on the outside of the rotating shaft (610) and meshing with the second bevel gear (707).

6. A titanium dioxide waste acid flash crystallization tank according to claim 5, characterized in that: The first scrapers (701) are symmetrically distributed on the vertical center line of the rotating frame (703), and the rotating frame (703) extends to the inside of the protective shell (706) and is connected to the second bevel gear (707).

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