Quartz sand pickling, purifying and cleaning equipment and purifying and cleaning method thereof

Abstract

The invention relates to the technical field of quartz sand pickling, in particular to quartz sand pickling, purifying and cleaning equipment and a purifying and cleaning method thereof.The quartz sand pickling, purifying and cleaning equipment comprises a pickling container and a discharging container detachably connected with the pickling container; a bearing connecting plate is arranged in the pickling container, so that the pickling container is divided into an upper layer and a lower layer; the upper layer of the pickling container is a pickling area for pickling and purifying quartz sand; the lower layer of the pickling container is a gas transmission area which is used for transmitting gas into the pickling area; the inner wall of the bottom of the pickling container is fixedly connected with communicating columns which are distributed circumferentially; the stirring component, the pickling area and the gas transmission area are arranged, the transmitted gas is air, chlorine or mixed gas of air and chlorine, when the transmitted gas is chlorine, the pH value of the pickling solution in the pickling area is reduced, the pickling solution is prevented from being added into the pickling solution, and due to the fact that water in the mixed solution is increased, the pH value of the pickling solution is reduced. The concentration of the pickling solution is reduced and the pickling rate is influenced.

Description

Technical Field

[0001] The invention relates to the technical field of quartz sand pickling, and in particular to quartz sand pickling, purification and cleaning equipment and a purification and cleaning method thereof. Background Art

[0002] Quartz sand is quartz particles made by crushing quartz stone. Quartz stone is a non-metallic mineral, a hard, wear-resistant, chemically stable silicate mineral. Quartz sand is an important industrial mineral raw material, a non-chemical hazardous substance, and is 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.

[0003] The grade of industrial quartz sand raw materials is getting lower and lower. In order to meet industrial needs, its grade can be improved through mineral processing. There are mainly the following purification methods: Scrubbing and desludging, scrubbing means using mechanical force and the abrasive force between sand particles to remove the thin film iron, adhesive and muddy impurity minerals on the surface of quartz sand, and further rub the unformed mineral aggregates, and then further purify the quartz sand through classification. Currently there are mainly rod scrubbing and mechanical scrubbing. The main factors affecting the scrubbing effect are the structural characteristics and configuration of the scrubbing machine; the secondary factors are the scrubbing time and scrubbing concentration (the scrubbing concentration is generally 50%-60%). There are mainly mechanical scrubbing, rod scrubbing, high-efficiency and strong scrubbing with added chemicals, and ultrasonic scrubbing. Magnetic separation is mainly used to remove magnetic minerals from quartz sand. For example, weakly magnetic minerals such as hematite, limonite, and biotite can be removed by a strong magnetic machine, while strong magnetic minerals such as magnetite can be removed by a weak magnetic separator. Flotation is used to remove impurities such as feldspar and mica in quartz sand that cannot be removed by magnetic separation, further improving its purity; Acid leaching utilizes the fact that quartz is insoluble in acid (except HF acid), while other impurity minerals can be dissolved by acid, thus further purifying quartz.

[0004] At present, in the prior art, the acid leaching process in the purification process of quartz sand is divided into four steps: 1) acid preparation, (2) pickling, (3) deacidification, and (4) purification. In the pickling operation, in order to allow the impurities on the quartz sand to react more thoroughly with the acid, a container with stirring and heating is used, so that the contact surface between the quartz sand and the prepared acidic liquid is wider and the reaction is faster.

[0005] After searching, the Chinese patent application No. 202321129376.3 discloses a quartz sand pickling device, including a pickling tank and a tank cover snap-fitted on the top of the pickling tank, a servo motor is fixedly installed at the center of the top of the tank cover, and a lifting cylinder is fixedly welded at the center of the bottom of the tank cover, the motor shaft of the servo motor passes through one end of the tank cover and is fixedly connected to a drive shaft, the bottom end of the drive shaft passes through the lifting cylinder and is rotatably connected to the center of the bottom end of the pickling tank, a spiral blade is constructed on the outer edge surface of the drive shaft that fits the inner wall of the lifting cylinder, and a plurality of equidistantly arranged spiral blades are formed on the top of the outer edge surface of the lifting cylinder in a circular array. A flow groove is provided, a circular groove for fixing a sand pipe is provided in the center of one side of the top of the tank cover, and a circular groove is provided in the center of the other side of the top of the pickling tank; the above patent has the following shortcomings: the contact area between the quartz sand and the acid solution can be increased by the stirring mechanism, but as the quartz sand increases, the acid concentration in the acid solution decreases, and the acid solution needs to be added again, and the added acid solution needs to be configured again, and when added to the pickling container, the concentration of the newly added acid solution is reduced because it has reacted with some impurities on the quartz sand to generate water, thereby affecting the speed at which the impurities on the quartz sand are pickled.

[0006] The purpose of the invention of this application is to solve the problem that the concentration of the acid solution in the pickling container decreases due to multiple additions of the acid solution, resulting in a slow pickling speed. Summary of the invention

[0007] In view of the above-mentioned shortcomings of the prior art, the present invention provides a quartz sand pickling, purification and cleaning equipment and a purification and cleaning method thereof, which can effectively solve the existing problems.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a quartz sand pickling, purification and cleaning device, comprising a pickling container and a material discharge container detachably connected to the pickling container; a connecting plate is arranged inside the pickling container so that the pickling container is divided into an upper and lower layer; the upper layer of the pickling container is a pickling area for pickling and purifying quartz sand; the lower layer of the pickling container is a gas transmission area for transmitting gas into the pickling area; the inner wall of the bottom of the pickling container is fixedly connected with connecting columns distributed in a circumference; the connecting columns pass through the top of the connecting plate and are rotatably connected with a stirring component for feeding gas into the pickling area and stirring; the material discharge container The inner walls on both sides of the container are fixedly connected with support and limit plates; the inner walls on the other two sides of the discharge container are rotatably connected with guide and steering plates respectively; the support and limit plates cooperate with the guide and steering plates to make the quartz sand evenly sprinkled in the pickling area of ​​the pickling container; the connecting plate is provided with a pH sensor for monitoring the pH value of the pickling solution; the gas transmitted in the gas transmission area is air, chlorine or a mixture of the above gases; when the transmitted gas is air, the gap between the quartz sand in the pickling area is increased; when the transmitted gas is chlorine, the pH value of the pickling solution in the pickling area is reduced.

[0009] Furthermore, the shape of the discharge container is a hollow frustum; the shape of the support and limit plate is a circular arc plate at the top, and extension plates parallel to the side plates of the discharge container are fixed on both sides of the circular arc plate.

[0010] Furthermore, the stirring component includes a stirring pillar rotatably connected to the connecting column and a protective member fixed on the stirring pillar, air outlets are provided at both ends of the stirring pillar, and stirring connecting rods are fixedly connected on both sides of the stirring pillar; the inner diameter of the air outlet of the air outlet is smaller than the inner diameter of the air inlet; the stirring connecting rod is arc-shaped, and the concave part of the stirring connecting rod is opposite to the air outlet, so that when the gas is transmitted from the air outlet, it acts on the inner side of the stirring connecting rod to cause the stirring connecting rod to rotate.

[0011] Furthermore, an extended stirring rod is rotatably connected to the outer inner wall of the stirring connecting rod, and the curvature of the extended stirring rod is the same as that of the stirring connecting rod; when the stirring connecting rod is stationary relative to the connecting column, the extended stirring rod is stationary on the outer inner wall of the stirring connecting rod; when the stirring connecting rod rotates relative to the connecting column, the extended stirring rod rotates out from the outer inner wall of the stirring connecting rod.

[0012] Furthermore, the protective member is in a conical shape so that the fallen quartz sand is scattered around the stirring member.

[0013] Furthermore, a barrier film is provided above the stirring connecting rod and between the stirring pillars, so that quartz sand will not gather between the stirring connecting rod and the air outlet.

[0014] Furthermore, air intake pipes are arranged around the pickling container, each of the air intake pipes is connected to one of the connecting columns, and connecting pipes are arranged between two adjacent connecting columns so that each of the connecting columns are connected to each other; the air intake pipes are connected to an external gas supercharger.

[0015] Furthermore, a uniformly distributed frosting component is fixedly connected to the top of the guide and steering plate; the frosting component includes a fixed pillar fixed above the guide and steering plate, a rotating pillar rotating inside the fixed pillar, and a rotating sleeve fixed on the rotating pillar, and a frosting layer is arranged around the rotating sleeve.

[0016] Furthermore, a water supply pipe runs through one side of the discharge container, and a nozzle is provided on the part of the water supply pipe located in the discharge container so that the water supply pipe supplies water to the pickling area to adjust the pH value; the water supply pipe is connected to an external water source.

[0017] A purification and cleaning method for quartz sand pickling, purification and cleaning equipment, comprising: S1: Weigh the quartz sand and place it aside, prepare a 10% hydrochloric acid solution as the pickling solution. The weight of the pickling solution is equal to 5% of the weight of the quartz sand. Heat the pickling solution to 65°C and pour it into the pickling area in the pickling container. Then install the unloading container on the pickling container. S2: Quartz sand is put into the discharge port of the discharge container, and the guide and steering plates are started. The support limit plates distribute the quartz sand on both sides and move downward. The quartz sand is evenly scattered in the pickling area of ​​the pickling container with the rotation of the guide and steering plates. The chemical reaction in the pickling area is as follows: Fe2O3+6HCl→2FeCl3+3H2O; S3: The pH sensor monitors the pH value of the mixed solution. When the pH value of the mixed solution is greater than 0.56, it goes to S4. When the pH value of the mixed solution changes slowly, go to S5. When the pH value of the mixed solution does not change, proceed to S6; S4: A mixed gas of air and chlorine is filled into the mixture through the air inlet pipe. The mixed gas acts on the stirring component through the connecting column to stir the quartz sand in the pickling area. At the same time, the chlorine reacts with the water in the mixed solution. The reaction is as follows: Cl2+H2O→HCl+HClO, Until the pH value of the mixed solution drops to an appropriate value, transfer to S3; S5: Filling air into it through the air inlet pipe, the air acts on the stirring member through the connecting column to stir the quartz sand in the pickling area until the pH value of the mixed solution changes at a normal rate, and then proceeds to S3; S6: The staff removes the unloading container, takes out the reacted quartz sand from the pickling container, and washes the pickled quartz sand with water.

[0018] Beneficial Effects Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects: By setting a stirring component, a pickling area, and a gas transmission area, and the transmitted gas is air, chlorine, or a mixture of air and chlorine, when the transmission gas is chlorine, the pH value of the pickling solution in the pickling area is reduced, thereby avoiding the addition of pickling solution to the pickling solution. Due to the increase in water in the mixed solution, the concentration of the pickling solution is reduced, affecting the pickling rate. When the transmission gas is air, the air rises upward in the mixed solution, contacts the quartz sand and can move the quartz sand in a small range, resulting in an increase in the gap between the quartz sands in the pickling area. In the process of gas transmission from the stirring component, the stirring component will rotate, thereby stirring the quartz sand in the pickling area, further increasing the gap between the quartz sands, increasing the contact area between the quartz sands and the acidic solution, and accelerating the reaction rate. The bottom area of ​​the pickling area of ​​the pickling container is large, but the height is small, so that the distribution of quartz sand in the pickling area tends to be horizontal. From the longitudinal section, the amount of quartz sand is small, so that the expansion area of ​​quartz sand in the pickling area is large, so that the contact area with the pickling solution is large; When the quartz sand slides from the guide and steering plate to the pickling area, it rubs against the grinding component, so that the quartz sand is first polished to reduce the thickness of impurities on its surface, thereby reducing the time required for pickling and improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the quartz sand pickling, purification and cleaning equipment of the present invention; Figure 2 It is a schematic cross-sectional structure diagram of the quartz sand pickling, purification and cleaning equipment of the present invention; Figure 3 It is a schematic diagram of the movement process of the guide diverter plate of the present invention; Figure 4 It is a schematic diagram of the internal structure of the pickling container of the present invention; Figure 5It is a schematic diagram of the explosion structure of the pickling container of the present invention; Figure 6 It is a schematic diagram of the explosion structure of the stirring component of the present invention; Figure 7 It is a schematic diagram of the rotation process of the stirring component of the present invention; Figure 8 It is a schematic structural diagram of the guide and steering plate of the present invention; Fig. 9 It is a schematic diagram of the cross-sectional structure of the frosting component of the present invention.

[0021] Reference numerals 100-pickling container; 101-air inlet pipe; 102-connecting plate; 103-connecting pipe; 110-connecting column; 120-stirring support column; 121-air outlet; 122-protective member; 123-stirring connecting rod; 124-extended stirring rod; 130-barrier membrane 200 - unloading container; 201 - water supply pipe; 202 - support limit plate; 210 - guide steering plate; 211 - rotating sleeve; 212 - fixed support pillar; 213 - rotating support pillar. DETAILED DESCRIPTION

[0022] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0023] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0024] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0025] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0026] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0027] The present invention will be further described below in conjunction with the embodiments.

[0028] Example: A quartz sand pickling, purification and cleaning equipment, such as Figure 1-9 As shown, it includes a pickling container 100 and a discharge container 200 detachably connected to the pickling container 100; a connecting plate 102 is arranged inside the pickling container 100 to divide the pickling container 100 into an upper and lower layer; the upper layer of the pickling container 100 is a pickling area for pickling and purifying quartz sand; the lower layer of the pickling container 100 is a gas transmission area for transmitting gas into the pickling area; the discharge container 200 is in the shape of a hollow frustum; it is worth noting that the pickling area of ​​the pickling container 100 has a large bottom area and a small height, so that the distribution of quartz sand in the pickling area tends to be horizontally spread. From the longitudinal section, the amount of quartz sand is small, so that the expansion area of ​​quartz sand in the pickling area is large, so that the contact area with the pickling solution is large; the inner wall of the bottom of the pickling container 100 is fixedly connected with connecting columns 110 distributed in a circle; the connecting The column 110 passes through the top of the connecting plate 102 and is rotatably connected with a stirring component for feeding gas into the pickling area and stirring. The connecting plate 102 is provided with a pH sensor for monitoring the pH value of the pickling solution. The gas transmitted in the gas transmission area is air, chlorine or a mixture of the above gases. When the transmitted gas is air, the gap between the quartz sands in the pickling area is increased. When the transmitted gas is chlorine, the pH value of the pickling solution in the pickling area is reduced. It should be noted that in this embodiment, the pickling solution used is a 10% hydrochloric acid solution. The 10% hydrochloric acid solution reacts with the main impurity ferric oxide on the surface of the quartz sand, and the reaction speed is relatively fast. The pH sensor monitors the pH value of the mixed solution in the pickling area. At the beginning, hydrochloric acid reacts with ferric oxide. The chemical equation and ionic equation of the reaction are as follows: Fe2O3+6HCl→2FeCl3+3H2O, Fe2O3+H + →2Fe 3+ +3H2O; As the reaction proceeds, H + The concentration decreases, that is, the pH value of the mixed solution increases. When the pH value increases to 0.56 or even higher, it means that the concentration of hydrochloric acid is 1% or lower. At this time, the reaction rate of hydrochloric acid and ferric oxide slows down. At this time, by adding a mixed gas of chlorine and air to the pickling solution, the mixed solution reacts with chlorine. The chemical equation and ionic equation of the reaction are as follows: Cl2+H2O→HCl+HClO, Cl2+H2O→2H + +Cl - +ClO - ; Although the above chemical reaction is a reversible reaction, the newly generated hydrochloric acid will increase the concentration of hydrochloric acid in the mixed solution, causing the hydrochloric acid to react with ferric oxide to consume hydrogen ions, thereby causing the reaction to proceed as shown in the above equation; Specifically, the stirring component includes a stirring pillar 120 rotatably connected to the connecting column 110, and a protective member 122 fixed on the stirring pillar 120, and gas outlets 121 are arranged at both ends of the stirring pillar 120, and stirring connecting rods 123 are fixedly connected on both sides of the stirring pillar 120, and the inner diameter of the gas outlet of the gas outlet 121 is smaller than the inner diameter of the gas inlet. It is worth noting that an airtight pad is arranged between the stirring pillar 120 and the connecting column 110 to ensure that the gas only flows out from the gas outlet 121, and the inner diameter of the gas outlet position of the gas outlet 121 is smaller than the inner diameter of the gas inlet position, thereby causing the gas transmitted from the gas outlet 121 to be faster; the stirring connecting rod 123 is in an arc shape, and the stirring The concave part of the stirring connecting rod 123 is opposite to the gas outlet 121, so that when the gas is transmitted from the gas outlet 121, it acts on the inner side of the stirring connecting rod 123 to rotate the stirring connecting rod 123. The stirring connecting rod 123 wraps the gas outlet 121, that is, the gas discharged from the gas outlet 121 directly acts on the stirring connecting rod 123, so that the stirring connecting rod 123 is forced to rotate, and the stirring connecting rod 123 is relatively long. During the synchronous rotation of the stirring connecting rod 123 and the gas outlet 121, the gas also acts on the stirring connecting rod 123, ensuring that there is always a force on the stirring connecting rod 123 during the gas discharge process from the gas outlet 121. The outer inner wall of the stirring connecting rod 123 is rotatably connected to an extended stirring rod 124. The extended stirring rod 124 is The curvature of the stirring rod 124 is the same as that of the stirring connecting rod 123; when the stirring connecting rod 123 is stationary relative to the connecting column 110, the extended stirring rod 124 is stationary on the outer inner wall of the stirring connecting rod 123; when the stirring connecting rod 123 rotates relative to the connecting column 110, the extended stirring rod 124 rotates out from the outer inner wall of the stirring connecting rod 123. During the rotation of the stirring connecting rod 123, the extended stirring rod 124 is subjected to centrifugal force, and under the action of the centrifugal force, the extended stirring rod 124 rotates out from the stirring connecting rod 123, thereby increasing the stirring range of the stirring component, driving more quartz sand to move, increasing liquid flow, and making the pickling reaction more thorough. The bottom; the shape of the protective member 122 is conical, so that the fallen quartz sand is scattered around the stirring component, and a blocking film 130 is arranged above the stirring connecting rod 123 and between the stirring pillar 120, so that the quartz sand will not gather between the stirring connecting rod 123 and the gas outlet 121; it should be noted that the blocking film 130 is a film that allows liquid and gas to pass through but not solid. The preferred material of the blocking film 130 in this embodiment is a polyimide film with an acid-resistant coating on the surface. Polyimide is a polymer material, and its molecular structure contains stable acyl bonds and imide bonds. These bonds have high chemical properties, so that polyimide cannot be dissolved or undergo ring-opening reaction in acidic media; Furthermore, the pickling container 100 is provided with air inlet pipes 101 around it, each of the air inlet pipes 101 is connected to a connecting column 110, and a connecting pipe 103 is provided between two adjacent connecting columns 110 so that each of the connecting columns 110 is connected to each other; the air inlet pipe 101 is connected to an external gas supercharger; it is worth noting that an air valve is also provided on the air inlet pipe 101, and each of the connecting columns 110 is connected to each other so that when transmitting gas, the gas can be evenly transmitted from multiple stirring components, thereby increasing the stirring range, and also facilitating the mixing of chlorine and air before being input into the pickling area; Furthermore, support and limiting plates 202 are fixedly connected to the inner walls of both sides of the discharge container 200; guide and steering plates 210 are rotatably connected to the inner walls of the other two sides of the discharge container; the support and limiting plates 202 cooperate with the guide and steering plates 210 to make the quartz sand evenly scattered in the pickling area of ​​the pickling container 100; the shape of the support and limiting plates 202 is a circular arc plate at the top, and extension plates parallel to the side plates of the discharge container 200 are fixed on both sides of the circular arc plate. It is worth noting that the quartz sand poured from the discharge port of the discharge container 200 is distributed on both sides of the discharge container 200 through the transmission of the support and limiting plates 202. The support and limiting plates 202 composed of the arc shape and the extension plates parallel to the side plates of the discharge container 200 can make the quartz sand evenly distributed on both sides and can reach the guide and steering plates 210. The guide and steering plates 210 are initially perpendicular to the side plates of the discharge container 200. At this time, the quartz sand is The guide steering plate 210 falls and lands in the middle of the pickling area. As the guide steering plate 210 rotates toward the side plate of the discharge container 200, the falling position of the quartz sand moves from the center of the pickling area to both sides, so that the quartz sand is evenly distributed in the pickling area to avoid the accumulation of quartz sand and affect the pickling progress. A water supply pipe 201 runs through one side of the discharge container 200. A nozzle is provided on the part of the water supply pipe 201 located in the discharge container 200, so that the water supply pipe 201 can supply water to the pickling area to adjust the pH value; the water supply pipe 201 is connected to an external water source. It should be noted that when more chlorine is flushed into the pickling area, in order to avoid chlorine from escaping and to reduce the hydrochloric acid concentration of the mixed solution in the pickling area, water is sprayed on the mixed solution through the nozzle on the water supply pipe 201. On the one hand, it contacts with the chlorine to prevent it from escaping from the discharge container, and on the other hand, it reduces the water added to the mixed solution, so that the hydrochloric acid concentration is reduced. In addition, a uniformly distributed frosting component is fixedly connected to the top of the guide and steering plate 210; the frosting component includes a fixed pillar 212 fixed above the guide and steering plate 210, a rotating pillar 213 rotating inside the fixed pillar 212, and a rotating sleeve 211 fixed on the rotating pillar 213, and a frosting layer is arranged around the rotating sleeve 211. It should be noted that when the quartz sand slides from the guide and steering plate 210 to the pickling area, it rubs against the frosting component, so that the quartz sand is first polished to reduce the thickness of impurities on its surface, thereby reducing the time required for pickling and improving the practicality of the device.

[0029] A purification and cleaning method for quartz sand pickling, purification and cleaning equipment, comprising: S1: Weigh the quartz sand and place it aside, prepare a 10% hydrochloric acid solution as a pickling solution, the weight of the pickling solution is equal to 5% of the weight of the quartz sand, and heat the pickling solution to 65°C and pour it into the pickling area in the pickling container 100, and then install the unloading container 200 on the pickling container 100; S2: Quartz sand is put into the material discharge port of the material discharge container 200, and the guide and steering plate 210 is started. The support limit plate 202 distributes the quartz sand on both sides and moves downward. The quartz sand is evenly scattered in the pickling area of ​​the pickling container 100 in coordination with the rotation of the guide and steering plate 210. The chemical reaction occurring in the pickling area is: Fe2O3+6HCl→2FeCl3+3H2O; S3: The pH sensor monitors the pH value of the mixed solution. When the pH value of the mixed solution is greater than 0.56, it goes to S4. When the pH value of the mixed solution changes slowly, go to S5. When the pH value of the mixed solution does not change, proceed to S6; S4: A mixed gas of air and chlorine is charged into the solution through the air inlet pipe 101. The mixed gas acts on the stirring component through the connecting column 110 to stir the quartz sand in the pickling area. At the same time, the chlorine reacts with the water in the mixed solution. The reaction is as follows: Cl2+H2O→HCl+HClO, Until the pH value of the mixed solution drops to an appropriate value, transfer to S3; S5: Filling the air through the air inlet pipe 101, the air acts on the stirring member through the connecting column 110 to stir the quartz sand in the pickling area until the pH value of the mixed solution changes at a normal rate, and then proceeds to S3; S6: The staff removes the unloading container 200, takes out the reacted quartz sand from the pickling container, and washes the pickled quartz sand with water.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A quartz sand pickling, purification and cleaning equipment, characterized in that: It comprises a pickling container (100) and a material discharge container (200) detachably connected to the pickling container (100); A connecting plate (102) is provided inside the pickling container (100) so as to divide the pickling container (100) into two layers, an upper layer and a lower layer; The upper layer of the pickling container (100) is a pickling area, which is used for pickling and purifying quartz sand; The lower layer of the pickling container (100) is a gas transmission area, which is used to transmit gas into the pickling area; The inner wall of the bottom of the pickling container (100) is fixedly connected with connecting columns (110) distributed in a circumference; the connecting columns (110) pass through the top of the receiving connecting plate (102) and are rotatably connected with a stirring component for supplying gas to the pickling area and stirring; The inner walls on both sides of the material discharge container (200) are fixedly connected with support and limit plates (202); the inner walls on the other two sides of the material discharge container are rotatably connected with guide and steering plates (210); the support and limit plates (202) and the guide and steering plates (210) cooperate with each other to ensure that the quartz sand is evenly scattered in the pickling area of ​​the pickling container (100); The receiving connecting plate (102) is provided with a pH sensor for monitoring the pH value of the pickling solution; The gas transmitted by the gas transmission area is air, chlorine or a mixture of the above gases; when the transmitted gas is air, the gap between the quartz sand in the pickling area is increased; when the transmitted gas is chlorine, the pH value of the pickling solution in the pickling area is reduced.

2. A quartz sand pickling, purification and cleaning equipment according to claim 1, characterized in that: The material discharge container (200) is in the shape of a hollow frustum; The support and limiting plate (202) is in the shape of a circular arc plate at the top, and extension plates parallel to the side plates of the discharge container (200) are fixed on both sides of the circular arc plate.

3. A quartz sand pickling, purification and cleaning equipment according to claim 2, characterized in that: The stirring component comprises a stirring pillar (120) rotatably connected to the connecting pillar (110), a protective piece (122) fixed to the stirring pillar (120), air outlets (121) being arranged at both ends of the stirring pillar (120), and stirring connecting rods (123) being fixedly connected to both sides of the stirring pillar (120); The inner diameter of the air outlet (121) at the air outlet is smaller than the inner diameter of the air inlet; The stirring connecting rod (123) is in an arc shape, and the concave portion of the stirring connecting rod (123) is opposite to the gas outlet (121), so that when gas is transmitted from the gas outlet (121), it acts on the inner side of the stirring connecting rod (123) to cause the stirring connecting rod (123) to rotate.

4. A quartz sand pickling, purification and cleaning equipment according to claim 3, characterized in that: An extended stirring rod (124) is rotatably connected to the inner wall of the outer side of the stirring connecting rod (123), and the curvature of the extended stirring rod (124) is the same as that of the stirring connecting rod (123); When the stirring connecting rod (123) is stationary relative to the connecting column (110), the extended stirring rod (124) is stationary on the outer inner wall of the stirring connecting rod (123); When the stirring connecting rod (123) rotates relative to the connecting column (110), the extended stirring rod (124) rotates out from the outer inner wall of the stirring connecting rod (123).

5. A quartz sand pickling, purification and cleaning equipment according to claim 4, characterized in that: The protective member (122) is in a conical shape so that the fallen quartz sand is scattered around the stirring member.

6. A quartz sand pickling, purification and cleaning equipment according to claim 5, characterized in that: A blocking film (130) is provided above the stirring connecting rod (123) and between the stirring pillar (120) so as to prevent quartz sand from gathering between the stirring connecting rod (123) and the gas outlet (121).

7. A quartz sand pickling, purification and cleaning equipment according to claim 6, characterized in that: Air inlet pipes (101) are arranged around the pickling container (100), each of the air inlet pipes (101) is connected to a connecting column (110), and a connecting pipe (103) is arranged between two adjacent connecting columns (110) so that each of the connecting columns (110) is connected to each other; The air intake pipe (101) is connected to an external gas supercharger.

8. A quartz sand pickling, purification and cleaning equipment according to claim 7, characterized in that: The top of the guide and diverter plate (210) is fixedly connected with evenly distributed frosting components; The frosting component comprises a fixed support (212) fixed above the guide and steering plate (210), a rotating support (213) rotating inside the fixed support (212), and a rotating sleeve (211) fixed on the rotating support (213), wherein a frosting layer is arranged around the rotating sleeve (211).

9. A quartz sand pickling, purification and cleaning equipment according to claim 8, characterized in that: A water supply pipe (201) is passed through one side of the unloading container (200), and a nozzle is provided on the portion of the water supply pipe (201) located in the unloading container (200) so that the water supply pipe (201) supplies water to the pickling area to adjust the pH value; The water supply pipe (201) is connected to an external water source.

10. A purification and cleaning method for a quartz sand pickling, purification and cleaning device, applied to a quartz sand pickling, purification and cleaning device as claimed in claim 9, characterized in that: include: S1: Weigh the quartz sand and place it aside, prepare a 10% hydrochloric acid solution as a pickling solution, the weight of the pickling solution is equal to 5% of the weight of the quartz sand, heat the pickling solution to 65°C and pour it into the pickling area in the pickling container (100), and then install the unloading container (200) on the pickling container (100); S2: Quartz sand is put into the feed container (200) through the feed port, and the guide and steering plate (210) is started. The support limit plate (202) distributes the quartz sand on both sides and moves downward. The quartz sand is evenly scattered in the pickling area of ​​the pickling container (100) in coordination with the rotation of the guide and steering plate (210). The chemical reaction occurring in the pickling area is as follows: Fe2O3+6HCl→2FeCl3+3H2O; S3: The pH sensor monitors the pH value of the mixed solution. When the pH value of the mixed solution is greater than 0.56, it goes to S4. When the pH value of the mixed solution changes slowly, go to S5. When the pH value of the mixed solution does not change, proceed to S6; S4: A mixed gas of air and chlorine is charged into the solution through the air inlet pipe (101). The mixed gas acts on the stirring component through the connecting column (110) to stir the quartz sand in the pickling area. At the same time, the chlorine reacts with the water in the mixed solution. The reaction is as follows: Cl2+H2O→HCl+HClO, Until the pH value of the mixed solution drops to an appropriate value, transfer to S3; S5: Filling air into the mixture through the air inlet pipe (101), the air passes through the connecting column (110) and acts on the stirring member to stir the quartz sand in the pickling area until the pH value of the mixed solution changes at a normal rate, and then proceeds to S3; S6: The staff removes the unloading container (200), takes out the reacted quartz sand from the pickling container, and washes the pickled quartz sand with water.

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