Chlorination process titanium dioxide waste acid evaporation recovery equipment

Abstract

The utility model relates to the technical field of waste acid treatment equipment, and discloses chlorination process titanium dioxide waste acid evaporation recovery equipment which comprises a tank body, the tank body is connected with a gas outlet pipe and a liquid inlet pipe, a heating chamber and a stirring assembly are arranged in the tank body, and the bottom of the tank body is connected with a separation assembly; the stirring assembly comprises a first motor, the first motor is connected with a plurality of first stirring rods through a rotating shaft, a rotating rod is arranged between the first stirring rods, the rotating rod is connected with a plurality of second stirring rods, and the rotating rod is connected with the rotating shaft through a driving assembly; the separation assembly comprises a separation chamber, a screen plate is arranged in the separation chamber, the left side of the screen plate is rotationally connected with the separation chamber, a collection box is arranged on the right side of the screen plate, and a vibration assembly is arranged at the bottom of the collection box. The first stirring rod and the second stirring rod are driven to transversely and vertically rotate, so that internal liquid is fully stirred, uniform heating is ensured, and the evaporation efficiency is improved; the sieve plate moves up and down to prevent the sieve plate from being blocked, and the later filtering effect is prevented from being influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of waste acid treatment equipment, in particular to an evaporation recovery device for waste acid from chloride process titanium dioxide production. Background Technique

[0002] At present, there are only two process technologies for the production of titanium dioxide, namely the sulfuric acid method and the chloride method, but the prices of the finished products produced by the two differ by several thousand (per ton). Sulfuric acid method titanium dioxide not only has low value but also narrow applications. Titanium dioxide is mainly used in the production of coatings (about 60%), and for those with high weather resistance requirements such as automotive paints and exterior wall coatings, only chloride method titanium dioxide can be used.

[0003] The processing of titanium dioxide will produce a large amount of waste acid. The main method for waste acid recovery is evaporation crystallization. The evaporation crystallization method is mainly used for the recovery and treatment of waste acid solutions containing volatile acids such as hydrochloric acid, hydrofluoric acid, and nitric acid. The working principle of the evaporation crystallization method is based on the volatile characteristics of hydrochloric acid, hydrofluoric acid, and nitric acid. By heating, acidic gases are generated through evaporation and condensed to form recovered acid, and the concentrated solution is treated differently according to different waste acid solutions.

[0004] The existing document with application publication number CN219314627U discloses a waste acid evaporation crystallization device. The separation module is used for separating crystals and concentrated solution, including a housing arranged on one side of the tank body, a communication pipeline connecting the bottom of the tank body and the top of the housing, an electric valve installed on the communication pipeline, legs fixed at the bottom end of the housing, a pump installed on the legs and communicating with the bottom end of the housing, guide rails symmetrically fixed on the inner wall of the housing, a collection frame movably arranged in the inner cavity of the housing, a filter screen installed on the inner wall of the collection frame, and a feeding pipeline connecting the pump and the liquid inlet pipeline. The housing forms a sealed space for installing other components. One end of the communication pipeline is connected to the bottom of the tank body, and the other end is connected to the top of the housing for feeding the concentrated solution mixed with crystals in the inner cavity of the tank body into the inner cavity of the housing. The electric valve is used to control the opening and closing of the communication pipeline. This waste acid evaporation crystallization device has the advantages of avoiding crystal blockage and strong practicability.

[0005] However, this solution still has deficiencies. During actual use, the scraping plate can only perform horizontal stirring, and the internal liquid is not easily heated evenly, thereby affecting the evaporation crystallization effect. At the same time, while the separation module filters the crystals, the filter screen is prone to blockage, thus affecting the later filtration effect, and it is necessary to clean the collection frame manually regularly, with low efficiency.

[0006] Therefore, it is necessary to provide an evaporation recovery device for waste acid from chloride process titanium dioxide to solve the above technical problems. Content of the Utility Model

[0007] The purpose of the utility model is to solve the deficiencies existing in the prior art and propose an evaporation recovery device for waste acid from chloride process titanium dioxide.

[0008] To achieve the above object, the utility model adopts the following technical solution: A chlorination process titanium white waste acid evaporation and recovery device, including a tank body, an air outlet pipe is connected to the top of the tank body, a liquid inlet pipe is connected to the side wall of the tank body, a heating chamber is arranged on the inner wall of the tank body, a stirring component is arranged inside the tank body, and a separation component is connected to the bottom of the tank body; The stirring component includes a first motor, the first motor is connected to the bottom of the tank body, the output end of the first motor extends into the tank body and is connected to a rotating shaft, a plurality of first stirring rods are connected to the rotating shaft, a rotating rod is arranged between the plurality of first stirring rods, the rotating rod is rotatably connected to the tank body, a plurality of second stirring rods are connected to the rotating rod, and the rotating rod and the rotating shaft are connected by a driving component; The separation component includes a separation chamber, a slantingly placed sieve plate is arranged inside the separation chamber, the higher side of the sieve plate is rotatably connected to the inner wall of the separation chamber, a collection box is arranged on the lower side of the sieve plate, and a vibration component is arranged at the bottom of the collection box.

[0009] Preferably, the driving component includes a first helical gear, the first helical gear is sleeved on the rotating shaft, one end of the rotating rod close to the rotating shaft is connected to a second helical gear, and the first helical gear and the second helical gear are meshed with each other.

[0010] Preferably, the vibration component includes a second motor, the second motor is connected to the outer wall of the separation chamber, and the output end of the second motor extends into the separation chamber and is connected to a cam.

[0011] Preferably, the separation chamber is connected to the tank body through a feeding pipe, the bottom of the separation chamber is connected to the liquid inlet pipe through a circulation pipe, a pump is arranged on the circulation pipe, and a valve is arranged on the feeding pipe.

[0012] Preferably, a first support is connected to the bottom of the tank body, and a second support is connected to the bottom of the separation chamber.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. In the utility model, the first motor drives the rotating shaft to rotate, the first helical gear is connected to the rotating shaft, so as to drive the first helical gear to rotate, the second helical gear is connected to the rotating rod, the first helical gear and the second helical gear are meshed with each other, so as to drive the rotating rod to rotate. Through the rotation of the rotating shaft and the rotating rod, the first stirring rod and the second stirring rod are respectively driven to rotate horizontally and vertically, so as to fully stir the internal liquid, ensure uniform heating, and improve the evaporation efficiency.

[0015] 2. In the present utility model, the second motor drives the cam to rotate. The cam is located below the lower side of the sieve plate, so that the sieve plate moves up and down, and the crystals filtered on the sieve plate are conveyed along the inclined direction of the sieve plate into the collection box, thereby preventing the sieve plate from being blocked and avoiding affecting the later filtration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the front view structural sectional view of the present utility model;

[0017] Figure 2 is Figure 1 the enlarged view of the structure at A in

[0018] Figure 3 is Figure 1 the enlarged view of the structure at B in

[0019] In the figure: 1 - tank body; 101 - liquid inlet pipe; 102 - gas outlet pipe; 103 - heating chamber; 104 - first motor; 105 - circulation pipe; 106 - rotating shaft; 107 - first stirring rod; 108 - rotating rod; 109 - first helical gear; 110 - second helical gear; 111 - second stirring rod; 112 - first bracket; 2 - separation chamber; 201 - sieve plate; 202 - collection box; 203 - second motor; 204 - cam; 205 - second bracket; 206 - feeding pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be clearly described below in conjunction with the drawings in the embodiments of the present utility model and specific embodiments. The description here is only used to explain the present utility model and does not limit the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative work, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present utility model.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Please refer to Figures 1-3 , the present utility model provides an embodiment: a chlorination process titanium dioxide waste acid evaporation and recovery device, including a tank body 1. An air outlet pipe 102 is connected to the top of the tank body 1, a liquid inlet pipe 101 is connected to the side wall of the tank body 1, a heating chamber 103 is provided on the inner wall of the tank body 1, heating resistance wires are provided inside the heating chamber 103, a stirring assembly is provided inside the tank body 1, and a separation assembly is connected to the bottom of the tank body 1; the stirring assembly includes a first motor 104, the first motor 104 is connected to the bottom of the tank body 1, the output end of the first motor 104 extends into the tank body 1 and is connected to a rotating shaft 106, a plurality of first stirring rods 107 are connected to the rotating shaft 106, a rotating rod 108 is provided between the plurality of first stirring rods 107, the rotating rod 108 is rotatably connected to the tank body 1, a plurality of second stirring rods 111 are connected to the rotating rod 108, and the rotating rod 108 and the rotating shaft 106 are connected through a driving assembly; the separation assembly includes a separation chamber 2, an inclined sieve plate 201 is provided inside the separation chamber 2, the higher side of the sieve plate 201 is rotatably connected to the inner wall of the separation chamber 2, a collection box 202 is provided on the lower side of the sieve plate 201, a vibration assembly is provided at the bottom of the collection box 202, a first support 112 is connected to the bottom of the tank body 1, and a second support 205 is connected to the bottom of the separation chamber 2.

[0024] Further, the driving assembly includes a first helical gear 109 sleeved on the rotating shaft 106, one end of the rotating rod 108 close to the rotating shaft 106 is connected to a second helical gear 110, the first helical gear 109 and the second helical gear 110 mesh with each other. By driving the rotating shaft 106 to rotate through the first motor 104, the first helical gear 109 is connected to the rotating shaft 106, thereby driving the first helical gear 109 to rotate. The second helical gear 110 is connected to the rotating rod 108, and the first helical gear 109 and the second helical gear 110 mesh with each other, thereby driving the rotating rod 108 to rotate. Through the rotation of the rotating shaft 106 and the rotating rod 108, the first stirring rod 107 and the second stirring rod 111 are driven to rotate horizontally and vertically respectively, so as to fully stir the internal liquid and ensure uniform heating.

[0025] Further, the vibration assembly includes a second motor 203. The second motor 203 is connected to the outer wall of the separation chamber 2. The output end of the second motor 203 extends into the interior of the separation chamber 2 and is connected to a cam 204. The second motor 203 drives the cam 204 to rotate. The cam 204 is located below the lower side of the sieve plate 201, so that the sieve plate 201 moves up and down, and the crystals filtered on the sieve plate 201 are conveyed along the inclined direction of the sieve plate 201 into the collection box 202, thereby preventing the sieve plate 201 from being blocked and avoiding affecting the later filtration effect.

[0026] Further, the separation chamber 2 is connected to the tank body 1 through a feed pipe 206. The bottom of the separation chamber 2 is connected to the liquid inlet pipe 101 through a circulation pipe 105. A pump is provided on the circulation pipe 105, and a valve is provided on the feed pipe 206.

[0027] Working principle of the present utility model: When the present utility model is in use, the staff adds waste liquid into the tank body 1 through the liquid inlet pipe 101, heats the liquid through the heating chamber 103, heats and evaporates the waste liquid, and starts the first motor 104. The first motor 104 drives the rotating shaft 106 to rotate. A first helical gear 109 is connected to the rotating shaft 106, thereby driving the first helical gear 109 to rotate. A second helical gear 110 is connected to the rotating rod 108. The first helical gear 109 meshes with the second helical gear 110, thereby driving the rotating rod 108 to rotate. Through the rotation of the rotating shaft 106 and the rotating rod 108, the first stirring rod 107 and the second stirring rod 111 are respectively driven to rotate horizontally and vertically, so as to fully stir the internal liquid, ensure uniform heating, and thus improve the evaporation efficiency; the evaporated acidic gas is discharged through the air outlet pipe 102. As the evaporation progresses, the concentration of the waste liquid becomes higher and forms crystals, which are conveyed into the separation chamber 2 through the feed pipe 206. The second motor 203 is started, and the second motor 203 drives the cam 204 to rotate. The cam 204 is located below the lower side of the sieve plate 201, so that the sieve plate 201 moves up and down, and the crystals filtered on the sieve plate 201 are conveyed along the inclined direction of the sieve plate 201 into the collection box 202. After part of the waste liquid passes through the sieve plate 201, it is sent back into the liquid inlet pipe 101 through the circulation pipe 105 for secondary evaporation.

[0028] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A chlorination process titanium dioxide waste acid evaporation recovery device, comprising a tank body (1), characterized in that: The top of the tank body (1) is connected to an air outlet pipe (102), the side wall of the tank body (1) is connected to a liquid inlet pipe (101), the inner wall of the tank body (1) is provided with a heating chamber (103), the interior of the tank body (1) is provided with a stirring assembly, and the bottom of the tank body (1) is connected to a separation assembly; The stirring assembly comprises a first motor (104), the first motor (104) is connected to the bottom of the tank body (1), an output end of the first motor (104) extends to the inside of the tank body (1) and is connected to a rotating shaft (106), a plurality of first stirring rods (107) are connected to the rotating shaft (106), a rotating rod (108) is provided between the plurality of first stirring rods (107), the rotating rod (108) is rotatably connected to the tank body (1), a plurality of second stirring rods (111) are connected to the rotating rod (108), and the rotating rod (108) and the rotating shaft (106) are connected via a driving assembly; The separation component comprises a separation chamber (2), wherein an inclined sieve plate (201) is provided inside the separation chamber (2), the higher side of the sieve plate (201) is rotatably connected to the inner wall of the separation chamber (2), the lower side of the sieve plate (201) is provided with a collection box (202), and the bottom of the collection box (202) is provided with a vibration component.

2. The evaporation and recovery equipment for waste acid of titanium dioxide produced by the chloride process according to claim 1, characterized in that: The driving assembly comprises a first bevel tooth (109), the first bevel tooth (109) is sleeved on the rotating shaft (106), one end of the rotating rod (108) close to the rotating shaft (106) is connected to the second bevel tooth (110), and the first bevel tooth (109) and the second bevel tooth (110) are meshed with each other.

3. A chloride process titanium dioxide waste acid evaporation and recovery equipment according to claim 1, characterized in that: The vibration component comprises a second motor (203), the second motor (203) is connected to the outer wall of the separation chamber (2), and the output end of the second motor (203) extends to the interior of the separation chamber (2) and is connected to the cam (204).

4. A chlorination process titanium dioxide waste acid evaporation and recovery equipment according to claim 1, characterized in that: The separation chamber (2) is connected to the tank body (1) via a feeding pipe (206), and the bottom of the separation chamber (2) is connected to the liquid inlet pipe (101) via a circulation pipe (105). A pump is provided on the circulation pipe (105), and a valve is provided on the feeding pipe (206).

5. The evaporation and recovery equipment for waste acid of titanium dioxide produced by the chloride process according to claim 1, characterized in that: The bottom of the tank body (1) is connected to a first bracket (112), and the bottom of the separation chamber (2) is connected to a second bracket (205).

Images