Concentrating and filtering system

Abstract

The utility model relates to a concentrating and filtering system which comprises a titaniferous solution preheating transfer tank (1) and is characterized in that a liquid outlet at the lower part of the titaniferous solution preheating transfer tank (1) is connected with a liquid inlet pipe (L1) through an outlet pneumatic valve (2), the liquid inlet pipe (L1) is connected with an inlet of a filter (4) through an inlet pipe clamping valve (3), and an outlet of the filter (4) is connected with a liquid outlet pipe (L2) through an outlet pipe clamping valve (5); the liquid inlet pipe (L1) is further connected with a bypass pipe (L3), a bypass straight-through valve (6) is arranged on the bypass pipe (L3), the tail end of the liquid outlet pipe (L2) is connected into the bypass pipe (L3), and the bypass pipe (L3) is connected into a concentration system (9) through a feeding pump (8). Calcium sulfate crystals are filtered through a screen of the filter and collected to the bottom, materials are cut to a bypass straight-through pipeline during cleaning, and production continuity is guaranteed. During cleaning, only the lower blind plate needs to be detached, and cleaning can be completed within a short time. The labor cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of titanium dioxide production, and specifically relates to a concentration and filtering system. Background Art

[0002] In the titanium dioxide production process, the MVR concentration system is used to evaporate part of the water in the titanium liquid under reduced pressure and transport it to the subsequent process. Calcium sulfate is generated by the reaction between calcium ions in the refined titanium liquid and free acids in the feed liquid. Calcium sulfate is less soluble in hot water, and precipitates from the feed liquid and adheres to the walls of pipes and tanks. After being flushed or vibrated by the feed liquid, the crystals fall and are pumped into the system through the concentration feeding pump. When the cumulative throughput of each MVR concentration system reaches 3000-10000m³, the steam heater plate heat exchanger will be blocked by calcium sulfate crystals, and the feeding volume will be significantly reduced. The system must be stopped and disassembled for manual cleaning, which greatly reduces the efficiency and continuity of production, consumes water and electricity resources, and increases production costs. Summary of the invention

[0003] The purpose of the utility model is to avoid the shortcomings of the prior art and provide a concentration and filtration system, thereby effectively reducing the blockage of the concentration plate heat exchanger and the tube heat exchanger.

[0004] To achieve the above-mentioned purpose, the technical solution of the present utility model is: a concentration and filtration system, including a titanium liquid preheating transfer tank, characterized in that: the lower liquid outlet of the titanium liquid preheating transfer tank is connected to the liquid inlet pipe through an outlet pneumatic valve, the liquid inlet pipe is connected to the inlet of the filter through an inlet pipe clamp valve, and the outlet of the filter is connected to the liquid outlet pipe through the outlet pipe clamp valve; the liquid inlet pipe is also connected to a bypass pipe, a bypass straight-through valve is provided on the bypass pipe, the end of the liquid outlet pipe is connected to the bypass pipe, and the bypass pipe is connected to the concentration system through a feeding pump.

[0005] The filter has a large cover on the top of the silo body, four brackets on the inner wall of the silo body, and the screen is vertically arranged in the middle of the silo body through the brackets. A feed port is arranged on one side of the lower part of the silo body, and a discharge port is arranged on the other side. An exhaust valve is arranged on the top of the silo body. A cleaning port is also arranged at the lower part of the silo body, and the cleaning port is blocked with a blind plate. The screen is woven from Ф3mm titanium wire, and the mesh aperture is 5mmX5mm.

[0006] A drain valve is provided on the liquid inlet pipe section between the inlet pipe clamp valve and the filter.

[0007] Principle: Calcium ions in titanium liquid react with free acid in the feed liquid to form calcium sulfate. Since the material temperature in the titanium liquid preheating transfer tank is relatively low, calcium sulfate continuously precipitates to form white crystals. The white crystals are filtered through the filter screen and collected at the bottom of the filter, thereby extending the cleaning cycle.

[0008] The beneficial effects of this utility model are as follows: calcium sulfate crystals are filtered through the screen of the filter and collected at the bottom of the device. When cleaning, the material is cut to the bypass straight-through pipeline, thereby ensuring production continuity. When cleaning, only the lower blind plate needs to be removed, and the cleaning can be completed in a short time. The cost and frequency of manual cleaning are reduced, the scaling of the inner wall of the equipment is effectively reduced, the heat exchange efficiency is improved, the energy consumption is reduced, and the production efficiency is improved while protecting the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a practical schematic diagram;

[0010] Figure 2 This is the main cross-sectional view of this practical filter;

[0011] Figure 3 This is a side cross-sectional view of the practical filter;

[0012] In the figure: 1-titanium liquid preheating transfer tank, 2-outlet pneumatic valve, 3-inlet pipe clamp valve, 4-filter, 41-silo body, 42-large cover, 43-bracket, 44-screen, 45-feed port, 46-discharge port, 47-cleaning port, 48-exhaust valve; 5-outlet pipe clamp valve, 6-bypass straight-through valve, 7-drain valve, 8-feeding pump, 9-concentration system.

[0013] L1-liquid inlet pipe, L2-liquid outlet pipe, L3-bypass pipe, K-feeding pump outlet valve group. DETAILED DESCRIPTION

[0014] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0015] Example 1: See Figure 1-3 A concentration and filtration system comprises a titanium liquid preheating transfer tank 1, characterized in that: the lower liquid outlet of the titanium liquid preheating transfer tank 1 is connected to the liquid inlet pipe L1 through the outlet pneumatic valve 2, the liquid inlet pipe L1 is connected to the inlet of the filter 4 through the inlet pipe clamp valve 3, and the outlet of the filter 4 is connected to the liquid outlet pipe L2 through the outlet pipe clamp valve 5; the liquid inlet pipe L1 is also connected to a bypass pipe L3, the bypass pipe L3 is provided with a bypass straight-through valve 6, the end of the liquid outlet pipe L2 is connected to the bypass pipe L3, and the bypass pipe L3 is connected to the concentration system 9 through the feeding pump 8.

[0016] A drain valve 7 is provided on the liquid inlet pipe L1 section between the inlet pipe clamp valve 3 and the filter 4 .

[0017] The top of the silo body 41 of the filter 4 is provided with a large cover 42, and four brackets 43 are provided on the inner wall of the silo body 41. The screen 44 is vertically arranged in the middle of the silo body 41 through the bracket 43. A feed port 45 is provided on one side of the lower part of the silo body 41, and a discharge port 46 is provided on the other side. An exhaust valve 48 is provided on the top of the silo body 41. A cleaning port 47 is also provided at the lower part of the silo body 41, and the cleaning port 47 is blocked with a blind plate. The screen 44 is woven from 3mm Ф titanium wire, and the mesh aperture is 5mmX5mm.

[0018] Working process: When the concentration system operates normally, open the outlet pneumatic valve 2, inlet pipe clamp valve 3, outlet pipe clamp valve 5, and feeding pump outlet valve group K of the titanium liquid preheating transfer tank 1, close the exhaust valve 48 at the top of the filter 4, the drain valve 7 and the bypass straight-through valve 6 at the front end of the filter 4, and the material in the titanium liquid preheating transfer tank 1 enters the filter 4. The calcium sulfate crystals in the material are filtered by the screen 44 and collected at the bottom of the filter 4. The filtered material is pumped into the concentration system 9 through the feeding pump 8.

[0019] When cleaning is required, the bypass straight-through valve 6 is opened, the inlet pipe clamp valve 3 and the outlet pipe clamp valve 5 are closed, the exhaust valve 48 is opened, and then the liquid is recovered through the exhaust valve 7. After draining, the blind plate of the cleaning port 47 is removed, and cleaning is performed from the cleaning port 47. It can be completed and put into use in a short time. If the screen 44 needs to be cleaned, the large cover 42 is removed, and the screen 44 is pulled out for cleaning.

Claims

1. A concentration and filtration system, comprising a titanium liquid preheating transfer tank (1), characterized in that: The lower liquid outlet of the titanium liquid preheating transfer tank (1) is connected to the liquid inlet pipe (L1) through the outlet pneumatic valve (2), the liquid inlet pipe (L1) is connected to the inlet of the filter (4) through the inlet pipe clamp valve (3), and the outlet of the filter (4) is connected to the liquid outlet pipe (L2) through the outlet pipe clamp valve (5); the liquid inlet pipe (L1) is also connected to a bypass pipe (L3), and the bypass pipe (L3) is provided with a bypass straight-through valve (6); the end of the liquid outlet pipe (L2) is connected to the bypass pipe (L3), and the bypass pipe (L3) is connected to the concentration system (9) through a feeding pump (8).

2. A concentration and filtration system according to claim 1, characterized in that: The top of the silo body (41) of the filter (4) is provided with a large cover (42); four brackets (43) are provided on the inner wall of the silo body (41); a screen (44) is vertically arranged in the middle of the silo body (41) through the brackets (43); a feed inlet (45) is provided on one side of the lower part of the silo body (41); a discharge outlet (46) is provided on the other side; and an exhaust valve (48) is provided on the top of the silo body (41).

3. A concentration and filtration system according to claim 1, characterized in that: A drain valve (7) is provided on the section of the liquid inlet pipe (L1) between the inlet pipe clamp valve (3) and the filter (4).

4. A concentration and filtration system according to claim 2, characterized in that: A cleaning port (47) is also provided at the lower portion of the silo body (41), and the cleaning port (47) is blocked by a blind plate.

5. A concentration and filtration system according to claim 2, characterized in that: The screen (44) is woven from Φ3 mm titanium wire, and the mesh aperture is 5 mm×5 mm.

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