Sedimentation tank

Abstract

The utility model relates to a settling tank which comprises a tank body and an acid inlet pipe, the tank body is provided with an acid inlet, an acid outlet, an exhaust port and a sand outlet, and the sand outlet is arranged at the bottom of the tank body; one end of the acid inlet pipe is communicated with the acid inlet, and the other end of the acid inlet pipe is communicated with the inner cavity of the tank body; according to the sedimentation tank, quartz sand can be placed in the tank body, acid liquor is injected into the tank body through the acid inlet formed in the tank body, the acid liquor can be discharged from the tank body through the acid outlet, residual air carried by the acid liquor can be discharged through the exhaust port, one end of the acid inlet pipe is communicated with the acid inlet, and the other end of the acid outlet pipe is communicated with the acid outlet. The acid inlet pipe is zigzag, so that the acid liquor flowing out of the reaction tank enters the settling tank from the deep part of the liquid level, the disturbance to a fine powder deposition layer at the bottom of the tank is reduced, and the acid liquor can flow into the inner cavity of the tank body smoothly. And fine powder can be precipitated in the quartz sand pickling process through the precipitation tank, so that the production efficiency of quartz sand pickling is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of quartz product production devices, in particular to a precipitation tank. Background Art

[0002] Quartz sand is an important industrial mineral raw material, widely used in glass, casting, ceramics and fireproof materials, smelting ferrosilicon, metallurgical flux, metallurgy, construction, chemical industry, plastics, rubber, abrasives, filter materials and other industries. Quartz sand purification mainly includes physical and chemical methods. In practical applications, due to the different amounts and types of impurities contained in quartz sand, it may be necessary to use a combination of multiple methods to achieve the purpose of purification. For example, most of the impurities can be removed by physical methods first, and then chemical methods can be used for deep purification. The specific purification process may include steps such as roughing, crushing, water quenching, crushing, magnetic separation, etc. At the same time, various equipment such as scrubbing and desludging equipment, crushing equipment, grinding equipment, grading equipment, magnetic separation equipment, etc. are also needed in the purification process. The sedimentation tank is an important equipment in the quartz sand purification industry, which is used to precipitate fine powder during the quartz sand pickling process. During the circulating heating and acid discharge steps of the quartz sand pickling process, some fine powder will be carried out by the acid. If the precipitation step is missing, the fine powder will continue to precipitate and accumulate in the acid circulation pipeline, resulting in poor acid circulation, which may lead to blockage or even pipe burst in severe cases, seriously affecting the normal pickling production activities. Therefore, there is an urgent need for a precipitation tank, which is used to precipitate fine powder during the circulating heating and acid discharge steps of the quartz sand pickling process, to solve the problem of poor acid circulation caused by the deposition of fine powder in the acid circulation pipeline, so as to ensure the normal progress of the quartz sand pickling and purification production. Utility Model Content

[0003] Based on this, it is necessary to provide a sedimentation tank to achieve the precipitation of fine powder during the quartz sand pickling process, thereby improving the production efficiency of quartz sand pickling.

[0004] A precipitation tank comprises a tank body and an acid inlet pipe, wherein the tank body is provided with an acid inlet, an acid outlet, an exhaust port and a sand outlet, wherein the sand outlet is provided at the bottom of the tank body; one end of the acid inlet pipe is connected to the acid inlet, and the other end is connected to the inner cavity of the tank body, and the acid inlet pipe is zigzag.

[0005] In the precipitation tank provided in the present application, quartz sand can be placed in the tank body, and acid liquid is injected into the tank body through the acid inlet opened in the tank body, the acid outlet can discharge the acid liquid from the tank body, and the exhaust port can discharge the remaining air carried by the acid liquid. One end of the acid inlet pipe is connected to the acid inlet, and the other end is connected to the inner cavity of the tank body so that the acid liquid can flow smoothly into the inner cavity of the tank body to achieve pickling and purification of the quartz sand. An L-shaped acid inlet pipe is used to allow the acid liquid flowing out of the reaction tank to enter the precipitation tank at a deep level of the liquid, thereby reducing the disturbance of the fine powder deposition layer at the bottom of the tank. The precipitation tank can realize the precipitation of fine powder during the pickling process of quartz sand, thereby improving the production efficiency of quartz sand pickling.

[0006] In one embodiment, the acid inlet is located at the top of the tank body, and the acid inlet pipe is in an L-shaped structure.

[0007] In one embodiment, the exhaust port is opened at the top of the tank body, the exhaust port is connected to the inner cavity through an exhaust pipe, and one end of the acid inlet pipe is connected to the inner cavity through the exhaust pipe.

[0008] In one embodiment, a dispersion plate is provided in the inner cavity. The dispersion plate is located at the bottom of the exhaust pipe and has a conical structure on a side facing the exhaust pipe opening.

[0009] In one embodiment, an exhaust hole is formed on a peripheral wall of the exhaust pipe.

[0010] In one embodiment, the bottom of the inner cavity is a conical structure, and the sand outlet is located at the bottom of the conical structure.

[0011] In one embodiment, a sand flushing port is provided at the bottom of the inner cavity.

[0012] In one embodiment, an overflow channel is provided on the top outer circumference of the tank body, the overflow channel is connected to the inner cavity, the overflow channel is inclined, and the acid outlet is located at the bottom of the lower end of the overflow channel.

[0013] In one embodiment, an overflow port is formed on a side wall of the overflow channel at the lower end.

[0014] In one embodiment, an observation window is provided at the bottom of the tank body, and the observation window is used to observe the environment in the inner cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0016] Figure 1 A first schematic diagram of a sedimentation tank provided in an embodiment of the present application;

[0017] Figure 2 A second schematic diagram of a sedimentation tank provided in one embodiment of the present application.

[0018] Reference numerals: precipitation tank 10; tank body 20; acid inlet 21; acid outlet 23; exhaust port 24; sand outlet 25; inner cavity 26; dispersion plate 260; sand flushing port 261; overflow channel 27; overflow port 270; observation window 28; inspection port 29; acid inlet pipe 30; exhaust pipe 40; exhaust hole 41 DETAILED DESCRIPTION

[0019] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0023] Quartz sand purification mainly includes physical and chemical methods. The physical method mainly includes water washing and graded desludging, scrubbing, magnetic separation and flotation, which can remove most of the impurities in quartz sand. Among them, scrubbing is to remove the film iron, bonding and mud impurity minerals on the surface of quartz sand by mechanical force and the abrasive force between sand particles, and then further purify the quartz sand through graded operation. At present, there are mainly two methods: rod scrubbing and mechanical scrubbing. For mechanical scrubbing, its effect is affected by mechanical structure, scrubbing time, scrubbing concentration, etc., and the recovery rate is low, about 40%; while rod scrubbing can improve the separation effect of impurity minerals and quartz by adding appropriate reagents, and the recovery rate can reach 80%. Chemical methods mainly include acid leaching, chlorination, etc., which can remove impurities that are difficult to remove by physical methods, but the cost is high and the technical requirements are strict, and it may also cause harm to the environment. However, in order to obtain higher purity quartz sand, it is sometimes inevitable to use chemical methods. In addition, there are some other purification methods, such as microbial methods, but the processing time is long and the efficiency depends largely on the nature of the mineral raw materials. In practical applications, due to the different amounts and types of impurities contained in quartz sand, it may be necessary to use a combination of multiple methods to achieve the purpose of purification. For example, most of the impurities can be removed by physical methods first, and then chemical methods can be used for deep purification. The specific purification process may include steps such as roughing, crushing, water quenching, crushing, magnetic separation, etc. At the same time, various equipment such as scrubbing and desludging equipment, crushing equipment, grinding equipment, grading equipment, magnetic separation equipment, etc. are also needed in the purification process. In traditional quartz sand purification, some fine powder will be brought out by the acid during the circulating heating and acid discharge process of the quartz sand pickling process. If the precipitation link is missing, the fine powder will continue to precipitate and accumulate in the acid circulation pipeline, and the acid circulation will be poor. In severe cases, it will cause blockage or even burst pipes, which will seriously affect the normal pickling production activities and cannot guarantee the normal pickling and purification production of quartz sand.

[0024] refer to Figure 1 and Figure 2 In order to solve the above problems, the embodiment of the present application provides a precipitation tank 10, including a tank body 20 and an acid inlet pipe 30, the tank body 20 is provided with an acid inlet 21, an acid outlet 23, an exhaust port 24 and a sand outlet 25, and the sand outlet 25 is opened at the bottom of the tank body 20; one end of the acid inlet pipe 30 is connected to the acid inlet 21, and the other end is connected to the inner cavity 26 of the tank body 20, and the acid inlet pipe 30 is tortuous.

[0025] In the precipitation tank 10, the precipitation tank 10 includes a tank body 20 and an acid inlet pipe 30. The tank body 20 is a container for purifying quartz sand. In some embodiments, the tank body 20 adopts a polyethylene plastic storage tank with strong corrosion resistance and good high temperature resistance. Through the pickling process, the acid can react with the oxides and impurities on the surface of the quartz sand to dissolve or fall off, thereby achieving the effect of cleaning and purification. The tank body 20 of the polyethylene plastic storage tank has high corrosion resistance and high temperature resistance, can remain stable during the pickling process, and will not cause secondary pollution to the quartz sand. It can maintain a long-term stable working state during the pickling process, and can also maintain good stability under high temperature conditions, and will not be damaged or deformed due to the increase in temperature. In some embodiments, the tank body 20 can adopt a conical structure, and the tank body 20 can also adopt a rectangular parallelepiped structure. The conical structure is convenient for observing the bottom of the tank body 20 through the observation window 28. In some embodiments, the tank body 20 can adopt a rectangular parallelepiped structure on the upper part, a conical structure on the lower half, and a structure in which the conical structure part is wider at the top and narrower at the bottom. In some embodiments, the precipitation tank 10 includes an acid inlet pipe 30, and the acid enters the acid inlet pipe 30 through the acid inlet 21 of the tank body 20, and then enters the tank. The pickling method is also called the acid leaching method, which uses the chemical substances that quartz sand is insoluble in acid, and most of the impurity minerals can be dissolved by acid to purify the quartz sand. The acid leaching method is divided into a single acid leaching method and a mixed acid leaching method. A medium-strength acid reacts with the impurities on the surface of the quartz sand, and can also form a stable coordination compound with the impurity ions after the reaction, reducing the concentration of impurity ions on the surface of the particles, and also reducing the precipitation of ions during the washing process, so that the impurity content in the quartz sand is further reduced. The tank body 20 is provided with an acid inlet 21, an acid outlet 23, an exhaust port 24 and a sand outlet 25. The tank body 20 is used to contain acid and fine powder. After the acid enters from the acid inlet 21 of the tank body 20, it can react with the impurities in the fine powder to reduce the impurities in the fine powder in the tank body 20. An acid inlet pipe 30 is provided under the acid inlet 21. In some embodiments, the tank body 20 includes a tank bottom and a top, the tank bottom is conical, and the top is connected to the tank bottom. In some embodiments, the tank body 20 of the precipitation tank 10 is made of acid-resistant plastic material, which can better prevent corrosion by acid during the acidification process. In some embodiments, the acid inlet pipe 30 is L-shaped, the upper end of the acid inlet pipe 30 is connected to the acid inlet 21, and the acid outlet 23 is used to discharge acid, and the acid can be discharged from the tank body 20 through the acid outlet 23. In some embodiments, the exhaust port 24 is used to discharge the remaining air carried by the acid, and the sand outlet 25 is used to discharge fine powder.The tank body 20 is provided with an acid inlet 21, an acid outlet 23, an exhaust port 24 and a sand outlet 25. The sand outlet 25 is provided at the bottom of the tank body 20. One end of the acid inlet pipe 30 is connected to the acid inlet 21, and the other end is connected to the inner cavity 26 of the tank body 20. The acid inlet pipe 30 is zigzag, and quartz sand can be placed in the tank body 20. Acid solution is injected into the tank body 20 through the acid inlet 21 provided in the tank body 20. The acid outlet 23 can discharge the acid solution from the tank body 20. The exhaust port 24 can discharge the remaining air carried by the acid solution. One end of the acid inlet pipe 30 is connected to the acid inlet 21, and the other end is connected to the inner cavity 26 of the tank body 20. 26 can make the acid liquid flow smoothly into the inner cavity 26 of the tank body 20, so as to realize the pickling and purification of the quartz sand. The acid inlet pipe 30 is tortuous, so that the acid liquid flowing out of the tank body 20 enters the precipitation tank 10 at the deep part of the liquid surface, which reduces the disturbance of the fine powder sedimentation layer at the bottom of the tank, and is conducive to the precipitation and falling of the fine powder. The above-mentioned precipitation tank 10 is used to precipitate fine powder in the circulating heating and acid discharge link of the quartz sand pickling process, solves the problem of the deposition of fine powder in the acid circulation pipeline causing the acid circulation to be unsmooth, can realize the circulating heating and acid discharge precipitation of fine powder in the quartz sand pickling process, and improve the production efficiency of quartz sand.

[0026] refer to Figure 1 and Figure 2In some embodiments, the acid inlet 21 is located at the top of the tank body 20, and the acid inlet pipe 30 is L-shaped. The L-shaped acid inlet pipe 30 and the exhaust pipe 40 are used to allow the acid flowing out of the reaction tank to enter the precipitation tank 10 at the deep part of the liquid surface, thereby reducing the disturbance of the fine powder sedimentation layer at the bottom of the tank, which is conducive to the precipitation and decline of the fine powder, and can achieve the cyclic heating and acid discharge precipitation of fine powder in the quartz sand pickling process to improve the production efficiency of quartz sand. Quartz sand is a non-metallic mineral, a hard, wear-resistant, chemically stable silicate mineral. Quartz sand is an important industrial mineral raw material and is widely used in glass, casting, ceramics and refractory materials, smelting ferrosilicon, metallurgical flux, metallurgy, construction, chemical industry, plastics, rubber, abrasives and other industries. During production, in order to improve the quality of the product, it is necessary to purify the quartz sand, and acid washing is often used to finally purify the quartz. Fine powder is precipitated in the cyclic heating and acid discharge links of the quartz sand pickling process, and the fine powder is deposited in the acid circulation pipeline, resulting in the problem of poor acid circulation. The precipitation tank 10 is an important equipment in the quartz sand purification industry, and is used to precipitate fine powder during the quartz sand pickling process. In the cyclic heating and acid discharge process of the quartz sand pickling process, some subdivisions will be taken out by the acid solution. If the precipitation link is missing, the subdivisions will continue to precipitate and accumulate in the acid circulation pipeline, and the acid circulation is not smooth. In severe cases, it will cause blockage or even burst pipes, which seriously affect the normal pickling production activities. The tank body 20 of the precipitation tank 10 can be used to accommodate the deposited fine powder. A dispersion plate 260 is provided in the inner cavity 26. The dispersion plate 260 is located at the bottom of the exhaust pipe 40 and is a conical structure facing the side of the exhaust pipe 40. The dispersion plate 260 can be set to a conical structure with a narrow upper and a wide lower. The dispersion plate 260 is used to reduce the disturbance of the fine powder deposition layer at the bottom of the tank by the acid. In some embodiments, the dispersion plate 260 is made of thermoplastic engineering plastics, which has the comprehensive properties of ordinary polyethylene and other engineering plastics, such as wear resistance, impact resistance, self-lubrication, corrosion resistance, impact energy absorption, low temperature resistance, sanitation and non-toxicity, non-adhesion, non-water absorption, and low density. In some embodiments, the exhaust pipe 40 is in a straight tube shape, and the exhaust pipe 40 extends vertically downward. The straight tube-shaped exhaust pipe 40 is conducive to the extraction of the residual gas in the acid solution, and is also conducive to the acid solution entering the acid inlet pipe 30 to flow into the inner cavity 26 of the tank body 20 more efficiently, reducing the waste of acid solution caused by pipeline grooves, etc. At the same time, setting the exhaust pipe 40 in a straight tube shape is conducive to preventing the acid solution from remaining in the pipeline, thereby reducing the corrosion of the precipitation tank 10 by the acid solution, and is conducive to improving the service life of the precipitation tank 10. In some embodiments, the exhaust port 24 is opened at the top of the tank body 20, and the exhaust port 24 is connected to the inner cavity 26 through the exhaust pipe 40. One end of the acid inlet pipe 30 is connected to the inner cavity 26 through the exhaust pipe 40. The exhaust port 24 can discharge the residual air carried by the acid solution. When the residual air enters the inner cavity 26 with the acid solution, it can be discharged through the exhaust port 24.In some embodiments, the exhaust pipe 40 faces the sand outlet 25, and the acid inlet 21 is arranged adjacent to the exhaust port 24. In some embodiments, the peripheral wall of the exhaust pipe 40 is provided with an exhaust hole 41, and the exhaust hole 41 can be provided in multiple numbers. The multiple exhaust holes 41 can discharge most of the air carried by the acid liquid out of the tank body 20. In some embodiments, the exhaust holes 41 can be provided at both the upper and lower parts of the exhaust pipe 40, which is conducive to better discharge of most of the air carried by the acid liquid. In some embodiments, the bottom of the inner cavity 26 is a conical structure, and the sand outlet 25 is located at the bottom of the conical structure. The sand outlet 25 is arranged in the center of the conical tank bottom for discharging fine powder. In some embodiments, a sand flushing port 261 is provided at the bottom of the inner cavity 26.

[0027] refer to Figure 1 and Figure 2 In some embodiments, an overflow channel 27 is provided on the outer circumference of the top of the tank body 20, and the overflow channel 27 is connected to the inner cavity 26. The overflow channel 27 is inclined, and the acid outlet 23 is located at the bottom of the lower end of the overflow channel 27. The overflow channel 27 allows excess acid to be discharged from the tank body 20 from the acid outlet 23. In some embodiments, an overflow port 270 is opened on the side wall of the lower end of the overflow channel 27. The overflow port 270 is used for sewage discharge. In some embodiments, the overflow port 270 is set at the lowest point of the overflow channel 27 for easy sewage discharge. An observation window 28 is provided at the bottom of the tank body 20. The observation window 28 is used to observe the environment in the inner cavity 26. For example, the observation window 28 can observe the deposition height of fine powder at the bottom of the tank body 20. In some embodiments, the observation window 28 is made of a material with high transparency, good corrosion resistance, and high temperature resistance, such as a quartz observation window 28. The observation window 28 can provide the operator with a clear observation angle, and can observe the deposition height of the fine powder at the bottom of the tank body 20 to control the amount and speed of acid entering the acid inlet 21. It is beneficial to more conveniently observe the progress of purification during the acidification and purification of quartz sand, and then facilitate the control of the entry and discharge of acid. In some embodiments, the outer wall section and the cone section of the precipitation tank 10 are evenly provided with multiple support legs, and the support legs can be set to three, and the support legs are set at equal intervals. In some embodiments, the support legs can be set to four, and the support legs are set at equal intervals. The support legs can support the precipitation tank 10, and the equal spacing of multiple support legs can improve the stability of the precipitation tank 10. In some embodiments, the tank body 20 is also provided with an inspection port 29, which can be adjacent to the acid inlet 21. The inspection port 29 can be used for repairing the internal pipes and devices of the precipitation tank 10, which is beneficial to the maintenance and inspection of the precipitation tank 10, thereby ensuring the normal use of the precipitation tank 10, improving the service life of the precipitation tank 10, and thus improving the production efficiency of quartz sand pickling.

[0028] refer to Figure 1 and Figure 2During the use of the precipitation tank 10, when the circulating heating or acid discharge link is implemented, the acid liquid flowing out of the tank body 20 of the precipitation tank 10 passes through the acid inlet 21 and then enters the L-shaped acid inlet pipe 30, so that the acid liquid enters the precipitation tank 10, and the acid liquid enters the exhaust pipe 40. The entrained air rises and is discharged from the precipitation tank 10 through the exhaust port 24. Further, after the acid liquid flows out of the exhaust pipe 40, it falls on the dispersion plate 260 at the upper part of the sand outlet 25, and the fine powder is deposited on the conical surface of the dispersion plate 260, and the acid liquid rises. When enough fine powder is deposited on the dispersion plate 260, the fine powder continues to slide down and enter the bottom of the tank body 20. Further, when it is observed through the observation window 28 that the fine powder deposition layer is high enough, the acid is stopped, and the sand outlet 25 and the sand flushing port 261 are opened, so that the fine powder can quickly flow out of the sedimentation tank 10 driven by the water flow. Further, when the fine powder is exhausted, the sand flushing port 261 and the sand outlet 25 are closed, and the acid continues to flow into the tank body 20 of the sedimentation tank 10 through the acid inlet 21, and then the process is repeated, thereby ensuring the normal production of quartz sand pickling and purification. The precipitation tank 10 can realize cyclic heating and acid discharge to precipitate fine powder during the quartz sand pickling process, thereby improving the production efficiency of quartz sand. Specifically, the acid liquid flowing out of the tank body 20 of the precipitation tank 10 passes through the acid inlet 21 and then enters the L-shaped acid inlet pipe 30. Since the tank body 20, the acid inlet pipe 30 and the exhaust pipe 40 are all made of corrosion-resistant materials, it is possible to ensure that the acid liquid enters the precipitation tank 10. The acid inlet 21 is located at the top of the tank body 20, and the acid inlet pipe 30 is an L-shaped structure. The L-shaped acid inlet pipe 30 and the exhaust pipe 40 are used, so that the acid liquid flowing out of the reaction tank enters the precipitation tank 10 at a deep level of the liquid surface, thereby reducing the disturbance of the fine powder sedimentation layer at the bottom of the tank. It is beneficial to the precipitation and descent of fine powder, and further beneficial to the realization of circulating heating and acid discharge and precipitation of fine powder in the process of quartz sand pickling. After the acid flows out of the exhaust pipe 40, it falls on the dispersion plate 260 on the upper part of the sand outlet 25. The dispersion plate 260 is located at the bottom of the exhaust pipe 40 and has a conical structure on the side facing the pipe mouth of the exhaust pipe 40. The dispersion plate 260 is used to reduce the disturbance of the fine powder deposition layer at the bottom of the tank caused by the acid inlet, which is beneficial to improve the efficiency of precipitating fine powder. Further, the fine powder is deposited on the conical surface of the dispersion plate 260, and the acid rises. After enough fine powder is deposited on the dispersion plate 260, the fine powder continues to slide down and enter the bottom of the tank body 20. At this time, the deposition of the fine powder at the bottom of the tank body 20 can be observed through the observation window 28. After that, the operator can continue to add acid and observe the observation window 28. When the fine powder deposition layer has not reached the specified height, the acid continues to be added into the tank body 20 through the acid inlet 21 and the acid inlet pipe 30. When the fine powder deposition layer is high enough, the acid addition at the acid inlet 21 is stopped. At this time, the sand outlet 25 and the sand flushing port 261 are opened, so that the fine powder can quickly flow out of the sedimentation tank 10 driven by the water flow.When the fine powder in the tank body 20 is exhausted, the sand flushing port 261 and the sand outlet 25 are closed. At this time, the operator can choose to continue adding acid solution for the next acid solution circulation according to demand, and then repeat the cycle. Through the above operation process, the fine powder can be effectively precipitated in the acid discharge link during the quartz sand pickling process, and at the same time, the fine powder can be prevented from being deposited in the acid solution circulation pipeline and affecting the effect of the acid solution circulation, thereby ensuring the normal progress of the quartz sand pickling and purification production, thereby improving the production efficiency of the quartz sand pickling.

[0029] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0030] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A sedimentation tank, characterized in that: The invention comprises a tank body and an acid inlet pipe, wherein the tank body is provided with an acid inlet, an acid outlet, an exhaust port and a sand outlet, and the sand outlet is provided at the bottom of the tank body; one end of the acid inlet pipe is connected to the acid inlet, and the other end is connected to the inner cavity of the tank body, and the acid inlet pipe is zigzag.

2. The sedimentation tank according to claim 1, characterized in that: The acid inlet is located at the top of the tank body, and the acid inlet pipe is in an L-shaped structure.

3. The sedimentation tank according to claim 1, characterized in that: The exhaust port is opened at the top of the tank body, the exhaust port is communicated with the inner cavity through an exhaust pipe, and one end of the acid inlet pipe is communicated with the inner cavity through the exhaust pipe.

4. The sedimentation tank according to claim 3, characterized in that: A dispersion plate is arranged in the inner cavity, and the dispersion plate is located at the bottom of the exhaust pipe and has a conical structure on a side facing the exhaust pipe opening.

5. The sedimentation tank according to claim 4, characterized in that: The peripheral wall of the exhaust pipe is provided with exhaust holes.

6. The sedimentation tank according to claim 1, characterized in that: The bottom of the inner cavity is a conical structure, and the sand outlet is located at the bottom of the conical structure.

7. The sedimentation tank according to claim 6, characterized in that: A sand flushing port is provided at the bottom of the inner cavity.

8. The sedimentation tank according to claim 1, characterized in that: An overflow channel is arranged on the outer peripheral edge of the top of the tank body, the overflow channel is connected to the inner cavity, the overflow channel is arranged obliquely, and the acid outlet is located at the bottom of the end of the overflow channel with a lower height.

9. The sedimentation tank according to claim 8, characterized in that: The overflow channel is provided with an overflow port on the side wall of the lower end.

10. The sedimentation tank according to claim 1, characterized in that: An observation window is provided at the bottom of the tank body, and the observation window is used to observe the environment in the inner cavity.

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