Silicon column reactor for removing fluorine from sulfuric acid

Abstract

The utility model discloses a silicon column reactor for removing fluorine from sulfuric acid, which comprises a reaction kettle, one side of the reaction kettle is provided with a feed port, the bottom of the reaction kettle is provided with a discharge port, a partition plate is arranged in the reaction kettle and divides the reaction kettle into a reaction cavity I and a reaction cavity II, and a valve is mounted on the partition plate; a driving part is mounted at the top of the reaction kettle, a rotating shaft is mounted at the output end of the driving part, the rotating shaft extends into the reaction kettle and penetrates through the partition plate, and the silicon columns are uniformly arranged on the periphery of the rotating shaft. The device is provided with the silicon columns, the reaction cavity I and the reaction cavity II, so that sulfuric acid can be in contact with the silicon columns twice, and the sulfuric acid is firstly in contact with the silicon columns in the corresponding cavities in the reaction cavity I, so that first-stage fluorine removal treatment is carried out, and most fluorine ions in the sulfuric acid are removed; and then the treated sulfuric acid enters the reaction cavity II to be in contact with the silicon columns in the corresponding cavity for second-stage fluorine removal treatment, so that the fluorine removal effect is good, and a larger part of fluorine ions in the sulfuric acid can be removed.

Description

Technical Field

[0001] The utility model belongs to the technical field of sulfuric acid defluorination, in particular to a sulfuric acid defluorination silicon column reactor. Background Art

[0002] Sulfuric acid contains a large amount of fluoride ions after stripping, which is very corrosive to steel. It can only be transported and stored using steel-lined PTFE pipelines, which has certain limitations when used downstream. Therefore, the fluoride ions in sulfuric acid need to be removed.

[0003] The traditional removal method is to use silicon dioxide to react with hydrogen fluoride in sulfuric acid to produce silicon tetrafluoride gas which enters the exhaust gas. Although this can remove fluoride ions in sulfuric acid, the removal effect is not good. Utility Model Content

[0004] The utility model aims at solving the problems existing in the prior art and proposes the following technical solutions:

[0005] Sulfuric acid defluorination silicon column reactor, comprising:

[0006] A reactor, wherein a feed port is provided on one side of the reactor, a discharge port is provided at the bottom of the reactor, a partition is provided inside the reactor, and the reactor is divided into a reaction chamber 1 and a reaction chamber 2, and a valve is installed on the partition;

[0007] Silicon columns, a driving member is installed on the top of the reactor, a rotating shaft is installed at the output end of the driving member, the rotating shaft extends into the reactor and passes through the partition, and silicon columns are evenly arranged on the periphery of the rotating shaft.

[0008] As a preferred embodiment of the above technical solution, a fixed shaft is provided on the periphery of the rotating shaft, the silicon column can be rotatably sleeved on the periphery of the fixed shaft, and the cross section of the silicon column is a cross shape.

[0009] As a preferred embodiment of the above technical solution, a liquid storage tank is installed on one side of the reactor, and ultrapure water or deionized water is stored in the liquid storage tank. Liquid outlet plates are provided at the bottom of the inner cavity of the reactor and the bottom of the partition, and nozzles are evenly provided on the liquid outlet plates. The liquid storage tank is connected to the liquid outlet plates through a pipeline, and a corresponding liquid pump is provided.

[0010] As a preferred embodiment of the above technical solution, a reflux pipe is connected to the bottom of the reactor, the other end of the reflux pipe is connected to a pump body, the pump body is connected to a liquid storage tank through a pipeline, and a filter is provided in the middle section of the reflux pipe.

[0011] As a preferred embodiment of the above technical solution, a heater is provided on the back of the outer wall of the reactor.

[0012] The beneficial effects of the utility model are:

[0013] 1. The utility model is provided with silicon columns, and is provided with reaction chamber 1 and reaction chamber 2, so that sulfuric acid can contact the silicon columns twice. The sulfuric acid first contacts the silicon columns in the corresponding chamber in reaction chamber 1, thereby performing the first-stage defluorination treatment, so that most of the fluoride ions in the sulfuric acid are removed. Then the treated sulfuric acid enters the reaction chamber 2 and contacts the silicon columns in the corresponding chamber for the second-stage defluorination treatment. The defluorination effect is good, and a large part of the fluoride ions in the sulfuric acid can be removed. At the same time, the cross-section of the silicon column is cross-shaped, which increases the contact area with the sulfuric acid and improves the defluorination effect. When the shaft rotates, the silicon column rotates around the shaft and also around the fixed shaft, so that the sulfuric acid solution can fully contact the silicon column, further improving the defluorination effect.

[0014] 2. The utility model is provided with a liquid storage tank, a liquid outlet plate, a nozzle, a reflux pipe, a pump body and a filter. Ultrapure water or deionized water is stored in the liquid storage tank. The surface of the silicon column is cleaned by the ultrapure water or deionized water to improve the service life of the silicon column. At the same time, the ultrapure water or deionized water can be recycled to avoid waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 2 Schematic diagram of the cross-sectional structure of a silicon column.

[0017] In the figure:

[0018] 1. Reactor; 2. Driving part; 3. Rotating shaft; 4. Silicon column; 5. Partition; 6. Valve; 7. Reaction chamber 1; 8. Reaction chamber 2; 9. Feed inlet; 10. Discharge outlet; 11. Liquid storage tank; 12. Liquid outlet plate; 13. Nozzle; 14. Reflux pipe; 15. Pump body; 16. Filter; 17. Heater; 18. Fixed shaft. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution of the present utility model will be clearly and completely described below in conjunction with the embodiments.

[0020] Example

[0021] like Figure 1-2 As shown;

[0022] A silicon column reactor for defluorination with sulfuric acid includes a reactor 1, which is made of corrosion-resistant steel. A feed port 9 is provided on one side of the reactor 1, a discharge port 10 is provided at the bottom of the reactor 1, and a partition 5 is provided inside the reactor 1 to divide the reactor 1 into a reaction chamber 1 7 and a reaction chamber 2 8. A valve 6 is installed on the partition 5, and the valve 6 is an electrically controlled valve. A driving member 2 is installed on the top of the reactor 1, and the driving member 2 is a motor. A rotating shaft 3 is installed at the output end of the driving member 2, and the rotating shaft 3 extends into the reactor 1 and passes through the partition 5. Silicon columns 4 are evenly arranged on the periphery of the rotating shaft 3. The silicon columns 4 are a solid adsorbent, which has a large number of surface active sites and can chemically or physically adsorb fluoride ions. When the silicon columns 4 are in contact with a fluorine-containing solution, the fluoride ions will be adsorbed on the surface of the silicon columns 4, thereby achieving the purpose of defluorination. The silicon columns 4 act as an adsorbent in the process of defluorination with sulfuric acid, helping to remove fluoride ions from the solution;

[0023] Sulfuric acid is added into the reactor 1 through the feed port 9, and the driving part 2 is started to rotate the rotating shaft 3, so that the silicon column 4 rotates to adsorb the fluoride ions in the sulfuric acid; the sulfuric acid first contacts the silicon column 4 in the corresponding cavity in the reaction chamber 1 7, so that the first stage of defluorination treatment occurs, and most of the fluoride ions in the sulfuric acid are removed, and then the valve 6 is opened to allow the treated sulfuric acid to enter the reaction chamber 2 8 for the second stage of defluorination treatment again. The defluorination effect is good, and a large part of the fluoride ions in the sulfuric acid can be removed.

[0024] Furthermore, a fixed shaft 18 is provided on the periphery of the rotating shaft 3, and the silicon column 4 can be rotatably sleeved on the periphery of the fixed shaft 18. The cross-section of the silicon column 4 is a cross-shape, which increases the contact area between the silicon column 4 and the sulfuric acid, thereby improving the defluorination effect. When the rotating shaft 3 rotates, the silicon column 4 will rotate around the fixed shaft 18 while rotating around the rotating shaft 3, so that the sulfuric acid solution can fully contact with the silicon column 4, further improving the defluorination effect.

[0025] Furthermore, a liquid storage tank 11 is installed on one side of the reactor 1, and ultrapure water or deionized water is stored in the liquid storage tank 11. The ultrapure water or deionized water can dissolve the fluoride ions adsorbed on the surface of the silicon column 4. The bottom of the inner cavity of the reactor 1 and the bottom of the partition 5 are both provided with a liquid outlet plate 12, and nozzles 13 are evenly arranged on the liquid outlet plate 12. The liquid storage tank 11 is connected to the liquid outlet plate 12 through a pipeline, and a corresponding liquid pump is provided. The ultrapure water or deionized water is pumped to the liquid outlet plate 12 through the internal liquid pump, and then sprayed out from the nozzle 13, thereby removing the fluoride ions adsorbed on the surface of the silicon column 4;

[0026] When the silicon column 4 needs to be cleaned after the sulfuric acid defluorination treatment is completed, the corresponding liquid pump is turned on to pump the ultrapure water or deionized water in the liquid storage tank 11 to the liquid outlet plate 12, and then sprayed from the nozzle 13 to the surface of the silicon column 4, thereby removing the fluorine ions adsorbed on the surface of the silicon column 4, and repeatedly washing to improve the removal effect;

[0027] Furthermore, a reflux pipe 14 is connected to the bottom of the reactor 1, and a pump body 15 is connected to the other end of the reflux pipe 14. The pump body 15 is connected to the liquid storage tank 11 through a pipeline, wherein a filter 16 is provided in the middle section of the reflux pipe 14, and an activated carbon filter layer is provided in the filter 16, which can adsorb fluoride ions in the ultrapure water or deionized water solution; when in use, the ultrapure water or deionized water will flow downward after contacting the silicon column 4, and finally enter the reflux pipe 14, and be pumped into the liquid storage tank 11 through the pump body 15, and at the same time, the fluoride ions in the ultrapure water or deionized water solution are filtered out by the filter 16, so that the ultrapure water or deionized water solution can be reused, thereby avoiding waste;

[0028] Furthermore, a heater 17 is provided on the back of the outer wall of the reactor 1. The heater 17 can be an external circulating heat pipe, which can heat the inside of the reactor 1, thereby heating the silicon column 4. In this way, the fluorine ions adsorbed on the surface of the silicon column 4 can be gradually volatilized, thereby improving the effect of cleaning the surface of the silicon column 4.

[0029] The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it.

Claims

1. Sulfuric acid defluorination silicon column reactor, It is characterized in that include: A reaction kettle (1), wherein a feed port (9) is provided on one side of the reaction kettle (1), a discharge port (10) is provided at the bottom of the reaction kettle (1), a partition (5) is provided inside the reaction kettle (1) to divide the reaction kettle (1) into a reaction chamber 1 (7) and a reaction chamber 2 (8), and a valve (6) is installed on the partition (5); Silicon columns (4), a driving member (2) is installed on the top of the reaction kettle (1), a rotating shaft (3) is installed on the output end of the driving member (2), the rotating shaft (3) extends into the reaction kettle (1) and passes through the partition (5), and silicon columns (4) are evenly arranged on the periphery of the rotating shaft (3).

2. The sulfuric acid defluorination silicon column reactor according to claim 1, Features: A fixed shaft (18) is arranged on the periphery of the rotating shaft (3), and the silicon column (4) can be rotatably sleeved on the periphery of the fixed shaft (18). The cross section of the silicon column (4) is a cross.

3. The sulfuric acid defluorination silicon column reactor according to claim 1, Features: A liquid storage tank (11) is installed on one side of the reaction kettle (1), and ultrapure water or deionized water is stored in the liquid storage tank (11). Liquid outlet plates (12) are provided at the bottom of the inner cavity of the reaction kettle (1) and the bottom of the partition (5), and nozzles (13) are evenly provided on the liquid outlet plates (12). The liquid storage tank (11) is connected to the liquid outlet plates (12) through a pipeline, and a corresponding liquid pump is provided.

4. The sulfuric acid defluorination silicon column reactor according to claim 3, Features: The bottom of the reaction kettle (1) is connected to a reflux pipe (14), the other end of the reflux pipe (14) is connected to a pump body (15), and the pump body (15) is connected to a liquid storage tank (11) through a pipeline, wherein a filter (16) is provided in the middle section of the reflux pipe (14).

5. The sulfuric acid defluorination silicon column reactor according to claim 1, Features: A heater (17) is provided on the back of the outer wall of the reaction kettle (1).

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