A spray device
By introducing multiple cooling and washing processes and branch pipe spray head design into the spray tower, the problem of spray tower blockage was solved, achieving better gas cooling effect and solid removal, and ensuring the stability of titanium dioxide production via the chloride process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 宜宾天原海丰和泰有限公司
- Filing Date
- 2025-06-13
- Publication Date
- 2026-06-12
AI Technical Summary
Currently, the spray towers are prone to clogging during the cooling and washing process, resulting in poor washing effect and affecting the stability of titanium dioxide production via the chloride process.
Design a spray device including multiple spray pumps and heat exchangers. Through multiple cooling and washing processes, the contact area between gas and cooling liquid is increased. The combination design of branch pipes and spray heads avoids clogging and extends service life.
This improved gas cooling efficiency, reduced solid content in subsequent systems, ensured stable production operation, and enhanced the stability of the chlorination system.
Smart Images
Figure CN224345630U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of equipment for the production of titanium dioxide by the chloride process, and more specifically, to a spraying device. Background Technology
[0002] The solids removal process in the chloride process of titanium dioxide production is one of the most important steps. The gas entering the solids removal process contains gases such as titanium tetrachloride, carbon monoxide, carbon dioxide, nitrogen, silicon tetrachloride, ferrous chloride, and manganese chloride, as well as solids such as petroleum coke, high-titanium slag, ferrous chloride, and manganese chloride that were not collected by the cyclone. When the solids are sprayed and cooled in the two circulating pump spray towers, metal chlorides such as ferrous chloride and manganese chloride will condense into the liquid phase of titanium tetrachloride in solid form. The high-titanium slag and petroleum coke are also in the liquid phase of titanium tetrachloride after washing. These solids will agglomerate in the equipment and stick to the equipment. After long-term operation, they will fall off into the liquid titanium tetrachloride.
[0003] In current solid removal spray devices, cooling and washing are carried out in the spray tower through circulating spraying. The current spray tower uses multiple small nozzles arranged in a ring to form smaller droplets to spray and wash the dust, thereby increasing the washing effect. However, in actual operation, most of the nozzles are quickly blocked, and only the large nozzles at the top are working, resulting in poor washing effect. Utility Model Content
[0004] This invention provides a spraying device to solve the problem of poor gas cooling and washing effect.
[0005] The embodiments of this utility model are implemented as follows:
[0006] A spraying device includes an air inlet pipe, a spray tower, a gas-liquid separator, and a solid removal tank connected in sequence. The gas-liquid separator is connected to an air supply pipe, and the solid removal tank is connected to a first spray pump and a second spray pump. The first spray pump and the second spray pump are respectively connected to a first heat exchanger and a second heat exchanger. The second heat exchanger is connected to the spraying device, and the spraying end of the spraying device is located inside the spray tower. The first heat exchanger is connected to a washing pipe, and the washing pipe is connected to the air inlet pipe.
[0007] This design allows the gas to be cooled to meet the cooling and washing liquid in advance. Without changing the volume of the spray tower, it increases the cooling and washing process and the contact area of the gas, so that the gas is fully cooled and has a better cooling effect. This increases the content of solid precipitation, thereby reducing the solid content in the subsequent condensation and refining systems of the chlorination process in the titanium dioxide unit, laying the foundation for improving the stability of the chlorination system.
[0008] In some technical solutions of this utility model, the above-mentioned spraying device includes a first main pipe, one end of which is connected to the second heat exchanger, and the other end is connected to a first branch pipe, which passes through the spraying tower and is connected to a first spray head.
[0009] Using a first branch pipe and a first spray head for secondary spray cooling, compared to the current ring design, can avoid clogging to a certain extent and extend service life.
[0010] In some technical solutions of this utility model, the above-mentioned spraying device further includes a second branch pipe connected to the first main pipe, and the second branch pipe passes through the spraying tower and is connected to a second spray head.
[0011] Adding a second branch pipe and a second spray head allows for more thorough cooling and washing of the gas, provided the pressure of the second spray pump is sufficient, thus improving the gas cooling effect.
[0012] In some technical solutions of this utility model, the washing pipe includes a second main pipe and a fourth branch pipe connected in sequence. The second main pipe is connected to the first heat exchanger, the fourth branch pipe is connected to the gas pipe, the second main pipe is connected to a third branch pipe, and the third branch pipe passes through the spray tower and is connected to a third spray head.
[0013] The installation of the third branch pipe and the third spray head can effectively utilize the first heat exchanger and the first spray pump to a certain extent, further increasing the gas cooling effect.
[0014] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects:
[0015] In this spraying device, a first spray pump and a washing pipe are installed on the first heat exchanger and connected to the air inlet pipe, so that the gas to be treated is mixed with the cooling liquid before entering the spray tower. This changes the original single-stage cooling and washing to a double-stage cooling and washing, resulting in better cooling of the gas to be treated, effectively improving the solid removal and washing effect, reducing the solid content entrained in the gas entering the subsequent system, and thus ensuring stable production operation. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 A schematic diagram of the structure of a spraying device in an embodiment of this utility model.
[0018] Icons: 1-Inlet pipe, 2-Spray tower, 3-Gas-liquid separator, 4-Solids removal tank, 5-Gas delivery pipe, 6-First heat exchanger, 7-Second heat exchanger, 8-Washing pipe, 9-First spray pump, 10-Second spray pump, 11-First main pipe, 12-Second main pipe, 13-First branch pipe, 14-First spray head, 15-Second branch pipe, 16-Second spray head, 17-Third branch pipe, 18-Third spray head, 19-Fourth branch pipe. Detailed Implementation
[0019] Example
[0020] Please refer to Figure 1 A spraying device includes an air inlet pipe 1, a spray tower 2, a gas-liquid separator 3, and a solid removal tank 4 connected in sequence. The gas-liquid separator 3 is connected to an air supply pipe 5. The solid removal tank 4 is connected to a first spray pump 9 and a second spray pump 10. The first spray pump 9 and the second spray pump 10 are respectively connected to a first heat exchanger 6 and a second heat exchanger 7. The second heat exchanger 7 is connected to the spraying device. The spraying end of the spraying device is located inside the spray tower 2. The first heat exchanger 6 is connected to a washing pipe 8, which is connected to the air inlet pipe 1.
[0021] The working principle of this device is as follows: The gas entering the solid removal process contains titanium tetrachloride, carbon monoxide, carbon dioxide, nitrogen, silicon tetrachloride, ferrous chloride, manganese chloride, and other gases, as well as solids such as petroleum coke, high-titanium slag, ferrous chloride, and manganese chloride that were not collected by the cyclone. When the spray device starts working, the first spray pump 9, the second spray pump 10, the first heat exchanger 6, and the second heat exchanger 7 all start working. The solid titanium tetrachloride-containing gas after cyclone dust collection meets the washing liquid flowing into the washing pipe 8 under the action of the first spray pump 9 through the inlet pipe 1, and begins to be washed and cooled. The gas and the condensed solids (metal chlorides such as ferrous chloride and manganese chloride will be solidified) will be washed and cooled. The first batch of washing liquid (condensed and precipitated in the form of condensate) and the second batch of washing liquid are then mixed and enter the spray tower 2. Under the action of the second spray pump 10, the second batch of washing liquid enters the spray tower 2 through the spray device to perform secondary cooling and washing on the gas entering the spray tower 2. After washing, the gas, liquid and solid three phases enter the gas-liquid separator 3. After separation, the gas phase enters the subsequent system through the gas pipeline 5 for further cooling. The liquid containing solid titanium tetrachloride enters the solid removal tank 4. The liquid after removing the solid is used for the next spray. The first heat exchanger 6 and the second heat exchanger 7 cool the washing liquid that re-enters the circulation. The first spray pump 9 and the second spray pump 10 provide power to the washing liquid to make it circulate repeatedly.
[0022] It is worth noting that the first spray pump 9 preferably uses a pump with a flow rate of 85 m³ / h and a head of 51 m, and the washing pipe 8 adopts a DN80 spray pipe. In the above design, the gas to be cooled comes into contact with the cooling and washing liquid in advance. Without changing the volume of the spray tower 2, the process of cooling and washing the gas and the contact area are increased, so that the gas is fully cooled, has a better cooling effect, increases the content of solid precipitation, and thus reduces the solid content in the subsequent condensation system and refining system of the chlorination process in the titanium dioxide unit, laying the foundation for improving the stability of the chlorination system.
[0023] In a preferred embodiment, the spraying device includes a first main pipe 11, one end of which is connected to the second heat exchanger 7, and the other end is connected to a first branch pipe 13, which passes through the spraying tower 2 and is connected to a first spray head 14.
[0024] In the above embodiment, the first nozzle is preferably a DN50 nozzle with a spray angle of 120° and a maximum unobstructed size of 34.9 mm. The circulating cooling liquid, powered by the second spray pump 10, is cooled by the second heat exchanger 7 and then passes through the first main pipe 11, the first branch pipe 13, and the first spray head 14 to perform secondary cooling and washing on the gas entering the spray tower 2. This causes metal chlorides such as ferrous chloride and manganese chloride to condense into the liquid phase of titanium tetrachloride in solid form. In this design, the solids precipitated and the solids contained in the gas, such as petroleum coke, high-titanium slag, ferrous chloride, and manganese chloride, can avoid clogging to a certain extent and extend service life compared to the current annular design.
[0025] In a preferred embodiment, the above-mentioned spraying device further includes a second branch pipe 15 connected to the first main pipe 11, and the second branch pipe 15 passes through the spraying tower 2 and is connected to a second spray head 16.
[0026] In the above embodiment, the addition of a second branch pipe 15 and a second spray head 16 allows for more thorough cooling and washing of the gas when the pressure of the second spray pump 10 is sufficient, thereby improving the gas cooling effect. Preferably, the second spray pump 10 is a pump with a flow rate of 85 m³ / h and a head of 51 m.
[0027] In a preferred embodiment, the washing pipe 8 includes a second main pipe 12 and a fourth branch pipe 19 connected in sequence. The second main pipe 12 is connected to the first heat exchanger 6, the fourth branch pipe 19 is connected to the gas pipe, and the second main pipe 12 is connected to a third branch pipe 17. The third branch pipe 17 passes through the spray tower 2 and is connected to a third spray head 18.
[0028] In the above embodiment, the arrangement of the third branch pipe 17 and the third spray head 18 can effectively utilize the first heat exchanger 6 and the first spray pump 9 to a certain extent, further increasing the gas cooling effect.
[0029] In summary, the embodiments of this utility model provide a spraying device that reduces the problem of solid blockage during cooling and washing, thereby increasing the service life of each nozzle and reducing the number of maintenance operations; it can effectively improve the solid removal and washing effect, reduce the solid content entrained in the gas entering the subsequent system, and thus ensure the stable operation of production.
[0030] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A spraying device, comprising an air inlet pipe (1), a spray tower (2), a gas-liquid separator (3), and a solid removal tank (4) connected in sequence, wherein the gas-liquid separator (3) is connected to an air supply pipe (5), the solid removal tank (4) is connected to a first spray pump (9) and a second spray pump (10), the first spray pump (9) and the second spray pump (10) are respectively connected to a first heat exchanger (6) and a second heat exchanger (7), the second heat exchanger (7) is connected to the spraying device, and the spraying end of the spraying device is located inside the spray tower (2), characterized in that, The first heat exchanger (6) is connected to a washing pipe (8), which is connected to the air inlet pipe (1).
2. The spraying device according to claim 1, characterized in that, The spraying device includes a first main pipe (11), one end of which is connected to the second heat exchanger (7), and the other end is connected to a first branch pipe (13). The first branch pipe (13) passes through the spraying tower (2) and is connected to a first spray head (14).
3. A spraying device according to claim 2, characterized in that, The spraying device also includes a second branch pipe (15) connected to the first main pipe (11), and the second branch pipe (15) passes through the spraying tower (2) and is connected to a second spray head (16).
4. A spraying device according to any one of claims 1-3, characterized in that, The washing pipe (8) includes a second main pipe (12) and a fourth branch pipe (19) connected in sequence. The second main pipe (12) is connected to the first heat exchanger (6), the fourth branch pipe (19) is connected to the gas pipe, the second main pipe (12) is connected to a third branch pipe (17), and the third branch pipe (17) passes through the spray tower (2) and is connected to a third spray head (18).