CN220802324U - Be used for fluorine-containing silica serialization washing device - Google Patents

Be used for fluorine-containing silica serialization washing device Download PDF

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Publication number
CN220802324U
CN220802324U CN202322036244.2U CN202322036244U CN220802324U CN 220802324 U CN220802324 U CN 220802324U CN 202322036244 U CN202322036244 U CN 202322036244U CN 220802324 U CN220802324 U CN 220802324U
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filter
washing
water
tank
plate
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CN202322036244.2U
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胡平曦
高亮
罗磊
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Guizhou Wengfu Lantian Fluorchem Co ltd
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Guizhou Wengfu Lantian Fluorchem Co ltd
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Abstract

The application relates to the technical field of preparation of concentrated fluosilicic acid, and particularly discloses a continuous washing device for fluorine-containing silicon dioxide, which comprises a plate-frame filter for filtering silicon dioxide in the concentrated fluosilicic acid, wherein one end of the plate-frame filter is provided with a filtrate outlet and a washing liquid outlet, the inlet end of the filter is communicated with a main pipeline through which the concentrated fluosilicic acid circulates, the filtrate outlet of the filter is communicated with a primary washing water system for cleaning the filter, and meanwhile, the washing liquid outlet of the plate-frame filter is also connected with a secondary washing water system for cleaning the filter. The purpose of this patent is to solve when filtering silica among the concentrated fluosilicic acid, need use more acid solution for the washing of silica filter cake, in case filter silica in a large number, just need more acid solution, and then increase manufacturing cost's problem.

Description

Be used for fluorine-containing silica serialization washing device
Technical Field
The utility model relates to the technical field of anhydrous hydrogen fluoride preparation, in particular to a continuous washing device for fluorine-containing silicon dioxide.
Background
Anhydrous hydrogen fluoride belongs to halogen acid products in the manufacture of inorganic acid in chemical product detection types. The anhydrous hydrogen fluoride has extremely active chemical properties, and can react with alkali, metal oxide, silicate and the like, and can also perform fluorination reaction with organic matters, so that the anhydrous hydrogen fluoride is often used as a catalyst for organic synthesis in chemical production to prepare products such as elemental fluorine, inorganic and organic fluorides, various fluorine refrigerants and the like. In addition, anhydrous hydrogen fluoride can also be used for corroding stratum and extracting rare earth elements and radioactive elements when mining certain ore deposits, manufacturing uranium hexafluoride, producing rocket fuel and additives, preparing hydrofluoric acid, even being used for graphite manufacturing and glass etching, and is one of important raw materials in chemical industry, petroleum industry and atomic energy industry.
The traditional anhydrous hydrogen fluoride is mainly prepared from fluorite as a raw material, and because fluorite belongs to non-renewable resources, the anhydrous hydrogen fluoride is successfully prepared by utilizing fluosilicic acid recovered in the phosphating industry, and the method has great significance in protecting fluorite resources.
In the process of preparing anhydrous hydrogen fluoride by using fluosilicic acid, a plurality of byproducts are generated, one of the byproducts is silicon dioxide, the silicon dioxide is usually in a solid state, the silicon dioxide has multiple purposes in industry and daily life, and the silicon dioxide is collected and utilized, so that other added values can be created. Meanwhile, because the silicon dioxide is in a solid state in the liquid concentrated fluosilicic acid, the silicon dioxide can be separated from the concentrated fluosilicic acid by physical methods such as filtration, centrifugation and the like, so that the subsequent treatment and utilization can be carried out.
The silica may be filtered from concentrated fluorosilicic acid by the following method:
And (3) filtering: the concentrated fluorosilicic acid and silica mixture is passed through a filter, which is typically made of a corrosion resistant material such as polypropylene, polyester, stainless steel, and the like. The filter can remove most of the silica to obtain pure concentrated fluorosilicic acid.
Sedimentation method: the mixture of concentrated fluorosilicic acid and silica is placed in a settler and silica particles are precipitated from the mixture by means of natural sedimentation or centrifugal sedimentation. The sedimentation method can remove silica more thoroughly, but requires a longer sedimentation time.
The filtration method is preferable because the sedimentation method requires a long sedimentation time, but an acid solution such as sulfuric acid, nitric acid, hydrochloric acid, etc. is used in the filtration process. These acid solutions can react with the silica to form a solid precipitate that is filtered out, but once a large batch of silica filter cake is required to be washed, more acid solution is required, which in turn increases the cost of producing anhydrous hydrogen fluoride.
Disclosure of utility model
Aiming at the defects of the prior art, the utility model provides a continuous washing device for fluorine-containing silicon dioxide, which solves the problems that more acid solution is needed for washing a silicon dioxide filter cake when the silicon dioxide in concentrated fluosilicic acid is filtered, and more acid solution is needed once the silicon dioxide is washed in a large batch, so that the production cost is increased.
In order to solve the problems, the utility model adopts the following technical scheme:
The utility model provides a be used for fluorine-containing silica serialization washing device, includes the board frame filter that is arranged in filtering the silica among the concentrated fluosilicic acid, and filtrate export and washing liquor export have been seted up to the one end of board frame filter, and the entrance point of board frame filter is linked together with the trunk line that the circulation has concentrated fluosilicic acid, the filtrate export intercommunication of filter has the one-level washing water system that is used for wasing the filter, has the second grade washing water system that is used for wasing the filter at the washing liquor exit linkage of board frame filter simultaneously.
The principle of the scheme is as follows:
The concentrated fluosilicic acid realizes solid-liquid separation through a plate-frame filter, at the moment, silicon dioxide is reserved in the filter, wastewater passing through the filter enters a primary washing water system, the primary washing water system sends the wastewater into the filter again, and the silicon dioxide in the filter is washed for the first time; after the primary washing is finished, the secondary washing system is started, the secondary washing system further washes silica in the filter, and the washed wastewater enters the primary washing system. The fluorine-containing wastewater is utilized to clean the silicon dioxide, so that the cleaning cost is reduced, and meanwhile, the secondary washing water system is used, the washing effect of the silicon dioxide is enhanced, and water and fluorine resources are effectively recycled.
The beneficial effect that this scheme produced is:
1. In the scheme of the application, the primary washing water system is arranged, and utilizes the fluorine-containing wastewater to clean the silicon dioxide in the filter, so that the cleaning effect is improved, and the wastewater is effectively recycled.
2. In the scheme of the application, the secondary washing water system and the primary washing water system are arranged to clean the silicon dioxide in the filter, so that the cleaning effect of the silicon dioxide is obviously improved.
Further, the first-stage washing water system comprises a wastewater tank for collecting fluorine-containing wastewater discharged by the filter, an outlet of the wastewater tank is communicated with the plate-frame filter, a first washing water pump for pumping wastewater is arranged at an outlet end of the wastewater tank, fluorine-containing wastewater flowing out of the filter can enter the wastewater tank, part of wastewater in the wastewater tank is pumped into the filter under the action of the first washing water pump, silica in the filter is washed for the first time, and part of wastewater can reenter the wastewater tank under the action of the first washing water pump to wait for next washing water.
Further, the second-stage washing water system comprises a circulating water tank for providing circulating water, the outlet end of the circulating water tank is communicated with the filter, a second washing water pump for pumping the circulating water is arranged at the outlet end of the circulating water tank, the circulating water in the circulating water tank is derived from cooling water of the heat exchange device, the cooling water is used as the circulating water, the circulating water is cleaner than the waste water, and the circulating water further washes silicon dioxide in the filter.
Furthermore, the top of the wastewater pool is also communicated with a water storage tank for storing low-concentration acid washing water, the water for washing the ground in a factory and part of rainwater contain fluorine, and the part of wastewater is collected and added into the wastewater to supplement the wastewater, so that the full utilization of resources is realized.
Further, the inside of water storage tank transversely is provided with the filter plate that is used for filtering low concentration pickling water, one side of filter plate is the slope form, the string bag that is used for collecting the impurity on the filter plate is installed to one side tip at the filter plate, one side of string bag extends to the outside of water storage tank and fixes, because low concentration pickling water is derived from the rainwater and washes the water in mill site, contain certain impurity in this part water, low concentration pickling water filters through the filter plate this moment, and the impurity in the low concentration pickling water falls into in the string bag along the inclined plane of filter plate, avoid more granule impurity pumps to reach in the filter, pollute the silica in the filter.
Further, the inside vertical installation of water storage tank has the connecting plate that is used for connecting the filter plate, the spout that supplies filter plate reciprocating motion from top to bottom has been seted up on the surface vertical of connecting plate, the motor that is used for driving filter plate reciprocating motion from top to bottom is installed to the outer wall of water storage tank simultaneously, the output shaft of motor extends in to the water storage tank, motor output shaft's end connection has the eccentric wheel that is located the filter plate below and can drive filter plate vibration, there is partial impurity can remain on the filter plate, can influence the filter effect of filter plate, the eccentric wheel constantly hits the bottom of filter plate under the drive of motor this moment, the filter plate is along spout reciprocating motion from top to bottom, with remaining impurity on the filter plate all fall in the string bag.
Drawings
FIG. 1 is a flow chart of the present utility model;
FIG. 2 is a schematic view of a water storage tank according to the present utility model.
Reference numerals in the drawings of the specification include:
The sewage treatment device comprises a filter 1, a circulating water tank 2, a second water washing pump 2-1, a wastewater tank 3, a first water washing pump 3-1, a water storage tank 4, a water inlet 4-1, a filter plate 4-2, a connecting plate 4-3, a sliding chute 4-4, a net bag 4-5, an eccentric wheel 4-6 and a water outlet 4-7.
Detailed Description
The following is a further detailed description of the embodiments:
An example is substantially as shown in figure 1:
The concentrated fluorosilicic acid produces silica as a by-product during the production process, and because silica has various uses in industry and daily life, it is necessary to filter silica from the concentrated fluorosilicic acid mixture and wash the silica cake.
As shown in fig. 1, the mixed solution of concentrated fluosilicic acid (liquid) and silicon dioxide (solid) flows in a main pipeline, the main pipeline is not drawn in the drawing, a plate frame filter 1 is connected to one end of the main pipeline, a filtrate inlet is formed at the joint of the main pipeline and the plate frame filter 1, a filtrate outlet and a washing liquid inlet are formed on the right side of the plate frame filter 1, the concentrated fluosilicic acid mixed solution in the main pipeline enters the filter 1 for filtering, and silicon dioxide in the concentrated fluosilicic acid mixed solution can remain in the filter 1.
The filtrate outlet of the plate frame filter 1 is communicated with the primary washing water system, the washing water outlet is communicated with the secondary washing water system, as shown in figure 1, the primary washing water system comprises a wastewater tank 3, the outlet of the wastewater tank 3 is communicated with the filter 1, a first washing water pump 3-1 for pumping wastewater is arranged between the wastewater tank 3 and the filter 1, the first washing water pump 3-1 at the outlet end of the washing water pump 3-1 is communicated with the wastewater tank 3 again, the first washing water pump 3-1 pumps fluorine-containing wastewater in the wastewater tank 3 into the filter 1 again, primary washing water is carried out on silicon dioxide in the filter 1, the utilization of the wastewater is realized, and part of redundant wastewater pumped by the first washing water pump 3-1 can reenter the wastewater tank 3 for storage.
One side of the wastewater tank 3 is provided with a water storage tank 4 for storing low-concentration acid washing water, the water outlet 4-7 of the water storage tank 4 is communicated with the wastewater tank 3, the low-concentration acid washing water is derived from water and rainwater for washing the ground of a factory, a small amount of fluorine is contained in the water, the low-concentration acid washing water is conveyed into the wastewater tank 3 and mixed with wastewater, the wastewater in the wastewater tank 3 is supplemented, and the external low-concentration acid washing water is fully utilized.
The secondary washing water system comprises a circulating water tank 2, external part of circulating water enters the circulating water tank 2, the circulating water is derived from cooling water of cooling equipment, a second washing water pump 2-1 for pumping the circulating water is arranged between the circulating water tank 2 and a filter 1, after the primary washing water is finished, the second washing water pump 2-1 sends the water in the circulating water tank 2 into the filter 1 to carry out secondary washing on silicon dioxide in the filter 1, and part of redundant circulating water pumped by the second washing water pump 2-1 can reenter the circulating water tank 2 for storage; the first rinse is performed under no air pressure, while the second rinse is performed under a supply of air pressure.
After the second-level water washing is finished, the circulating water enters the plate-and-frame filter 1 and then enters the first-level water washing system again, and enters the wastewater tank 3.
As shown in fig. 2, the top and bottom of the water storage tank 4 are respectively provided with a water inlet 4-1 and a water outlet 4-7, and as the low-concentration pickling water is derived from water and rainwater on the floor of a cleaning factory, the water contains more impurities, and the impurities can enter the filter 1 if not filtered, so that the pollution is caused to the silicon dioxide in the filter 1.
The inside of the water storage tank 4 is transversely provided with a filter plate 4-2 for filtering impurities in low-concentration pickling water, the filter plate 4-2 is inclined to the right side, a net bag 4-5 for collecting impurities is arranged at the right end of the filter plate 4-2, and the right side of the net bag 4-5 extends to the outside of the water storage tank 4 and is fixed through bolts. Impurities in the low concentration acid washing water are filtered by the filter plate 4-2 and fall into the net bag 4-5 along the inclined surface of the filter plate 4-2.
However, some impurities adhere to the surface of the filter sheet 4-2, and once the impurities accumulate more, the filtering effect of the filter sheet 4-2 is directly affected. For this reason evenly be fixed with four vertical connecting plates 4-3 in the front and back both sides of filter plate 4-2, the top and the bottom of connecting plate 4-3 are fixed welding with the inner wall of water storage tank 4 respectively, the spout 4-4 that supplies filter plate 4-2 to slide from top to bottom has been seted up on connecting plate 4-3 vertically, sliding connection between filter plate 4-2 and the connecting plate 4-3, eccentric wheel 4-6 that is used for vibrating filter plate 4-2 is installed to the bottom of connecting plate 4-3 simultaneously, the center department of rotation of eccentric wheel 4-6 is connected with the pivot, the pivot extends and fixedly connected with motor to water storage tank 4 outside, the motor is not drawn in the drawing. The eccentric wheel 4-6 is driven to rotate by the motor, and the rotating eccentric wheel 4-6 continuously hits the bottom of the filter plate 4-2, so that the filter plate 4-2 continuously moves up and down, and impurities attached to the surface of the filter plate 4-2 fall into the net bag 4-5.
The specific implementation process is as follows:
The mixed solution of the concentrated fluosilicic acid and the silicon dioxide enters a filter 1 for filtering, after the filter 1 finishes filtering, the discharged wastewater enters a wastewater tank 3, the wastewater in the wastewater tank 3 is mixed with low-concentration pickling water in a water storage tank 4, and under the action of a first water washing pump 3-1, the wastewater is pumped into the filter 1 to carry out first washing on the silicon dioxide in the filter 1; after the primary washing water is finished, the second washing water pump 2-1 conveys circulating water into the filter 1, and secondary washing water is carried out on the silicon dioxide in the filter 1; after the secondary washing is finished, the silicon dioxide which is washed clean in the filter 1 can be taken out.
The foregoing is merely exemplary embodiments of the present utility model, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims (6)

1. The utility model provides a be used for fluorine-containing silica serialization washing device, is including the board frame filter that is arranged in filtering the silica among the concentrated fluosilicic acid, and filtrate export and washing liquor export have been seted up to the one end of board frame filter, and the entrance point of filter is linked together its characterized in that with the trunk line that has concentrated fluosilicic acid in the circulation: the filtrate outlet of the filter is communicated with a primary washing water system for cleaning the filter, and the washing liquid outlet of the plate-frame filter is also connected with a secondary washing water system for cleaning the filter.
2. A continuous washing apparatus for fluoric silica according to claim 1, wherein: the first-stage washing water system comprises a wastewater tank for collecting wastewater containing fluorine discharged by the filter, an outlet of the wastewater tank is communicated with the plate-frame filter, and a first washing water pump for pumping wastewater is arranged at an outlet end of the wastewater tank.
3. A continuous washing apparatus for fluoric silica according to claim 1, wherein: the secondary washing water system comprises a circulating water tank for providing circulating water, the outlet end of the circulating water tank is communicated with the filter, and a second washing water pump for pumping the circulating water is arranged at the outlet end of the circulating water tank.
4. A continuous washing apparatus for fluoric silica according to claim 2, wherein: the top of the wastewater tank is also communicated with a water storage tank for storing low-concentration acid washing water.
5. A continuous washing apparatus for fluoric silica according to claim 4 wherein: the inside of water storage jar transversely is provided with the filter plate that is used for filtering low concentration pickling water, and one side of filter plate is the slope form, installs the string bag that is used for collecting the impurity on the filter plate in one side tip of filter plate, and the outside of the water storage jar of one side of string bag extends and fixes.
6. A continuous washing apparatus for fluoric silica according to claim 5 wherein: the inside of water storage tank is vertical installs the connecting plate that is used for connecting the filter plate, and the spout that supplies filter plate reciprocating motion from top to bottom is vertically seted up on the surface of connecting plate, and the motor that is used for driving filter plate reciprocating motion is installed to the outer wall of water storage tank simultaneously, and the output shaft of motor extends in to the water storage tank, and the end connection of motor output shaft has and is located the filter plate below and can drive filter plate vibration's eccentric wheel.
CN202322036244.2U 2023-07-31 2023-07-31 Be used for fluorine-containing silica serialization washing device Active CN220802324U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202322036244.2U CN220802324U (en) 2023-07-31 2023-07-31 Be used for fluorine-containing silica serialization washing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202322036244.2U CN220802324U (en) 2023-07-31 2023-07-31 Be used for fluorine-containing silica serialization washing device

Publications (1)

Publication Number Publication Date
CN220802324U true CN220802324U (en) 2024-04-19

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CN202322036244.2U Active CN220802324U (en) 2023-07-31 2023-07-31 Be used for fluorine-containing silica serialization washing device

Country Status (1)

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CN (1) CN220802324U (en)

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