Quartz sand pickling purification cleaning equipment and purification cleaning method thereof

Abstract

The present application relates to the technical field of quartz sand pickling, and particularly relates to a quartz sand pickling purification and cleaning device and a purification and cleaning method thereof, which comprises a pickling container and a discharging container detachably connected with the pickling container; a receiving connecting plate is arranged in the pickling container, so that the pickling container is divided into two layers; the upper layer of the pickling container is a pickling area for purifying quartz sand; the lower layer of the pickling container is a gas transmission area for transmitting gas into the pickling area; a plurality of communicating columns are fixedly connected with the inner wall of the bottom of the pickling container in a circumferential distribution; the stirring part, the pickling area, the gas transmission area, and the transmitted gas being air, chlorine or a mixture of air and chlorine are arranged, so that the pH value of the pickling solution in the pickling area is reduced when the transmitted gas is chlorine, and the addition of pickling solution into the pickling solution is avoided; due to the increase of water in the mixed solution, the concentration of the pickling solution is reduced, and the pickling rate is affected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of quartz sand acid washing, and particularly relates to a quartz sand acid washing, purifying and cleaning device and a purifying and cleaning method thereof. BACKGROUND

[0002] Quartz sand is a quartz particle processed by crushing quartzite. Quartzite is a non-metallic mineral and a kind of silicate mineral with hardness, wear resistance and stable chemical properties. Quartz sand is an important industrial mineral raw material, a non-chemical hazardous product, and is widely used in glass, casting, ceramics, fireproof materials, smelting silicon iron, metallurgical flux, metallurgy, building, chemical industry, plastics, rubber, abrasive, filter material and other industries.

[0003] The grade of quartz sand raw material in industry is getting lower and lower. In order to meet the needs of industry, the grade can be improved by beneficiation process. There are some purifying methods as follows.

[0004] Scrubbing removes mud. Scrubbing refers to removing film iron, adhesion and muddy impurity minerals on the surface of quartz sand by mechanical force and abrasive force between sand particles, and further rubbing the mineral aggregates that are not monomers, so as to achieve the effect of further purifying quartz sand. At present, there are mainly rod mill scrubbing and mechanical scrubbing. The main factors affecting the scrubbing effect are the structural characteristics and configuration form of the scrubbing machine; the secondary factors are scrubbing time and scrubbing concentration (the scrubbing concentration is generally appropriate to be 50%-60%). There are mainly mechanical scrubbing, rod mill scrubbing, dosing high-efficiency strong scrubbing and ultrasonic scrubbing methods;

[0005] Magnetic separation is mainly used to remove magnetic minerals in quartz sand, such as weak magnetic minerals like hematite, limonite and biotite can be removed by strong magnetic machine, and strong magnetic minerals like magnetite can be removed by weak magnetic separator;

[0006] Flotation is used to remove some impurities like feldspar and mica in quartz sand which cannot be removed by magnetic separation, so as to further improve the purity.

[0007] Acid leaching is to further purify quartz by taking advantage of the characteristics that quartz is insoluble in acid (except HF acid) and other impurity minerals can be dissolved in acid solution.

[0008] At present, in the existing technology, the acid leaching operation in the purifying process of quartz sand is divided into four steps: 1) acid preparation, (2) acid washing, (3) acid removal, and (4) purification. In the acid washing operation, in order to make the impurities on the quartz sand react more completely with the acid, a container with stirring and heating is used to make the contact surface of the quartz sand and the prepared acid solution wider and the reaction more rapid.

[0009] According to the search, the patent with the Chinese patent application number 202321129376.3 discloses a quartz sand pickling device, which comprises a pickling tank and a tank cover detachably arranged on the top of the pickling tank. The center of the top end of the tank cover is fixedly installed with a servo motor, and the center of the bottom end of the tank cover is fixedly welded with a lifting cylinder. The motor shaft of the servo motor is fixedly connected with a drive shaft at one end of the tank cover. The bottom end of the drive shaft is rotationally connected to the center of the inner bottom end of the pickling tank through the lifting cylinder. The outer edge surface of the drive shaft is provided with spiral blades which are in contact with the inner wall of the lifting cylinder. The top of the outer edge surface of the lifting cylinder is provided with a plurality of flow grooves which are evenly arranged in a ring shape. One side of the top end of the tank cover is centrally provided with a circular groove one for fixedly arranging a sand feeding pipe, and the other side of the top end of the pickling tank is centrally provided with a circular groove two. The above patent has the following shortcomings: the stirring mechanism can increase the contact area of quartz sand and acid solution, but as the amount of quartz sand increases, the acid concentration in the acid solution decreases, and the acid solution needs to be added again. The newly added acid solution needs to be prepared again, and when it is added into the pickling container, the concentration of the newly added acid solution is reduced due to the reaction of water generated by the previous reaction of the impurities on the quartz sand, which affects the speed of pickling of the impurities on the quartz sand.

[0010] The purpose of the present application is to solve the problem of reducing the pickling speed caused by the decrease of the concentration of the acid solution in the pickling container due to the addition of the acid solution for many times. SUMMARY

[0011] In view of the above-mentioned shortcomings of the prior art, the present application provides a quartz sand pickling and purification cleaning equipment and a purification cleaning method, which can effectively solve the existing problems.

[0012] To achieve the above purpose, the present application is realized by the following technical solutions:

[0013] The application provides a quartz sand pickling purification cleaning equipment, which comprises a pickling container and a discharging container detachably connected with the pickling container; a receiving connecting plate is arranged in the pickling container, so that the pickling container is divided into two layers; the upper layer of the pickling container is a pickling area for pickling purification of quartz sand; the lower layer of the pickling container is a gas transmission area for transmitting gas into the pickling area; a plurality of communicating columns are fixedly connected to the inner wall of the bottom of the pickling container in a circumferential distribution; a stirring part is rotatably connected to the top of the receiving connecting plate through the communicating columns, for feeding gas into the pickling area and stirring; support limiting plates are fixedly connected to the inner walls of both sides of the discharging container; guide turning plates are rotatably connected to the inner walls of the other two sides of the discharging container; the support limiting plates and the guide turning plates are matched with each other, so that the quartz sand is evenly scattered in the pickling area of the pickling container; a pH sensor is arranged on the receiving connecting plate, for monitoring the pH value of the pickling solution; the gas transmitted by the gas transmission area is air, chlorine or a mixed gas of the above-mentioned 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.

[0014] Further, the shape of the discharging container is a hollow truncated cone; the shape of the support limiting plate is a circular arc plate, and the two sides of the circular arc plate are fixedly connected with extension plates parallel to the side plates of the discharging container.

[0015] Further, the stirring part comprises stirring support columns rotatably connected to the communicating columns, and protection members fixed to the stirring support columns; the two ends of the stirring support columns are provided with gas outlets, and the stirring support columns are fixedly connected with stirring connecting rods on the two sides; the inner diameter of the gas outlet is smaller than that of the gas inlet; the shape of the stirring connecting rod is arc-shaped, and the concave part of the stirring connecting rod is opposite to the gas outlet, so that when the gas is transmitted from the gas outlet, the stirring connecting rod rotates due to the action of the gas on the inner side of the stirring connecting rod.

[0016] Further, the outer inner wall of the stirring connecting rod is rotatably connected with an extension stirring rod, and the bending degree of the extension stirring rod is the same as that of the stirring connecting rod; when the stirring connecting rod is stationary relative to the communicating column, the extension stirring rod is stationary on the outer inner wall of the stirring connecting rod; when the stirring connecting rod rotates relative to the communicating column, the extension stirring rod rotates out of the outer inner wall of the stirring connecting rod.

[0017] Further, the shape of the protection member is conical, so that the falling quartz sand is scattered around the stirring part.

[0018] Further, a blocking film is arranged between the stirring connecting rod and the stirring support column, so that the quartz sand cannot gather between the stirring connecting rod and the gas outlet.

[0019] Further, the acid washing container is provided with air inlet pipes around, each of which is connected with one of the communication columns, and the communication columns are connected with each other through the communication pipes.

[0020] Still further, the top of the guide turning plate is fixedly connected with evenly distributed frosted glass components; the frosted glass component comprises a fixed support fixed above the guide turning plate, a rotating support rotating in the fixed support, and a rotating sleeve fixed on the rotating support, and the rotating sleeve is provided with a frosted layer around.

[0021] Further, a water feeding pipe is penetrated through one side of the discharging container, and the water feeding pipe is provided with a nozzle on part of the discharging container to feed water to the acid washing area to adjust the pH value; the water feeding pipe is connected with an external water source.

[0022] A purification and cleaning method of a quartz sand acid washing purification and cleaning device, comprising:

[0023] S1: weigh the quartz sand and place it aside, prepare a hydrochloric acid solution with a concentration of 10% as the acid washing solution, the weight of the acid washing solution is 5% of the weight of the quartz sand, heat the acid washing solution to 65℃ and then pour it into the acid washing area in the acid washing container, and then install the discharging container on the acid washing container;

[0024] S2: put the quartz sand through the discharging port of the discharging container, and start the guide turning plate, the support limiting plate supports and positions the quartz sand to move downward on both sides, and the quartz sand is evenly scattered in the acid washing area of the acid washing container by cooperating with the rotation of the guide turning plate, and the chemical reaction occurring in the acid washing area is:

[0025] Fe2O3+6HCl→2FeCl3+3H2O;

[0026] 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, turn to S4,

[0027] when the pH value of the mixed solution changes slowly, turn to S5,

[0028] when the pH value of the mixed solution does not change, turn to S6;

[0029] S4: fill the mixed gas of air and chlorine into the acid washing area through the air inlet pipe, and the mixed gas acts on the stirring part through the communication column to stir the quartz sand in the acid washing area, at the same time, the chlorine reacts with the water in the mixed solution, and the reaction is as follows:

[0030] Cl2+H2O→HCl+HClO,

[0031] until the pH value of the mixed solution is reduced to a proper value, and S3 is entered;

[0032] S5: air is filled into the acid washing container through the air inlet pipe, and the air acts on the quartz sand in the acid washing area through the communication column to stir the quartz sand, until the pH value of the mixed solution changes normally, and S3 is entered;

[0033] S6: the operator removes the discharging container, takes out the reacted quartz sand from the acid washing container, and washes the acid washed quartz sand.

[0034] Advantages

[0035] Compared with the known prior art, the technical scheme provided by the present application has the following advantages:

[0036] By setting the stirring part, the acid washing area, the gas transmission area, and the transmitted gas being air, chlorine or a mixture of air and chlorine, when the transmitted gas is chlorine, the pH value of the acid washing solution in the acid washing area is reduced, avoiding the addition of acid washing solution to the acid washing solution. Due to the increase of water in the mixed solution, the concentration of the acid washing solution is reduced, affecting the acid washing rate. When the transmitted gas is air, the air rises in the mixed solution, contacts the quartz sand and can move the quartz sand in a small range, causing the gap between the quartz sand in the acid washing area to increase. During the transmission of the gas from the stirring part, the stirring part rotates, thereby stirring the quartz sand in the acid washing area, further increasing the gap between the quartz sand and increasing its contact area with the acid solution, accelerating the reaction speed.

[0037] The bottom surface area of the acid washing area of the acid washing container is large, and the height is small, so that the distribution of the quartz sand in the acid washing area tends to be horizontal, and from the vertical cross section, the number of quartz sand is small, so that the expansion area of the quartz sand in the acid washing area is large, and the contact area with the acid washing solution is large.

[0038] The quartz sand rubs against the sand polishing assembly during the process of sliding from the guide deflection plate to the acid washing area, so that the quartz sand is first polished, reducing the thickness of the surface impurities, thereby reducing the time required for acid washing and improving the practicality of the device. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0040] Figure 1The figure is a schematic diagram of the overall structure of the quartz sand acid pickling purification cleaning equipment of the present application.

[0041] Figure 2 The figure is a schematic diagram of the cross-sectional structure of the quartz sand acid pickling purification cleaning equipment of the present application.

[0042] Figure 3 The figure is a schematic diagram of the moving flow of the guide turning plate of the present application.

[0043] Figure 4 The figure is a schematic diagram of the internal structure of the acid pickling container of the present application.

[0044] Figure 5 The figure is a schematic diagram of the explosion structure of the acid pickling container of the present application.

[0045] Figure 6 The figure is a schematic diagram of the explosion structure of the stirring component of the present application.

[0046] Figure 7 The figure is a schematic diagram of the rotating flow of the stirring component of the present application.

[0047] Figure 8 The figure is a schematic diagram of the structure of the guide turning plate of the present application.

[0048] Figure 9 The figure is a schematic diagram of the cross-sectional structure of the sanding assembly of the present application.

[0049] Reference signs

[0050] 100-acid pickling container; 101-air inlet pipe; 102-accepting connecting plate; 103-communicating pipe; 110-communicating column; 120-stirring support column; 121-air outlet; 122-protective piece; 123-stirring connecting rod; 124-extended stirring rod; 130-blocking film

[0051] 200-feeding container; 201-water feeding pipe; 202-supporting limiting plate; 210-guide turning plate; 211-rotating sleeve; 212-fixing support column; 213-rotating support column. DETAILED DESCRIPTION

[0052] Embodiments of the present disclosure will be described in more detail by referring to the drawings. Although certain embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms, and should not be interpreted as being limited to the embodiments set forth herein. Rather, these embodiments are provided so as to more completely and thoroughly understand the present disclosure. It is understood that the drawings and embodiments of the present disclosure are for exemplary purposes only, and are not intended to limit the scope of protection of the present disclosure.

[0053] In addition, it needs to be noted that only parts related to the present application are shown in the drawings for the convenience of description. The embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0054] It should be noted that the concepts of “first”, “second”, and the like mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not intended to limit the order or interdependence of the functions performed by these devices, modules or units.

[0055] It should be noted that the modification of “one”, “multiple” mentioned in the present disclosure is illustrative but not restrictive, and those skilled in the art should understand that unless the context clearly indicates otherwise, it should be understood as “one or more”.

[0056] The present disclosure will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0057] The present application will be further described below in conjunction with the embodiments.

[0058] Embodiment:

[0059] A quartz sand pickling purification and cleaning device, such as Figures 1-9As shown, including pickling container 100, and with the pickling container 100 detachable connection of the lower container 200; the pickling container 100 inside is provided with the receiving web plate 102, so that the pickling container 100 is divided into two layers; the upper layer of the pickling container 100 is the pickling area, which is used for pickling purification of quartz sand; the lower layer of the pickling container 100 is the gas transmission area, which is used for transmitting gas into the pickling area; the shape of the lower container 200 is hollow frustum; it is worth noting that the bottom area of the pickling area of the pickling container 100 is larger, and the height is smaller, so that the distribution of quartz sand in the pickling area tends to be horizontal, and the amount of quartz sand is small from the longitudinal section, 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 the communication column 110 which is circumferentially distributed; the communication column 110 is rotatably connected with the stirring part through the top of the receiving web plate 102, which is used for feeding gas into the pickling area and stirring, the receiving web 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 mixed gas of the above-mentioned gas; when the transmission gas is air, the gap between the quartz sand in the pickling area is increased; when the transmission 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 10% hydrochloric acid solution, the 10% hydrochloric acid solution reacts with the main impurity of iron trioxide existing on the surface of 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, the hydrochloric acid reacts with the iron trioxide, and the chemical equation and ion equation of the reaction are as follows:

[0060] Fe2O3+6HCl→2FeCl3+3H2O, Fe2O3+H + →2Fe 3+ +3H2O;

[0061] With the reaction, the concentration of H + In the mixed solution is reduced, that is, the pH value of the mixed solution is increased, when the pH value is increased to 0.56 or even higher, that is, the concentration of hydrochloric acid is 1% or lower, at this time, the reaction speed of hydrochloric acid and iron trioxide is slow, at this time, by adding the mixed gas of chlorine and air into the pickling solution, the mixed solution reacts with chlorine, and the chemical equation and ion equation of the reaction are as follows:

[0062] Cl2+H2O→HCl+HClO, Cl2+H2O→2H + +Cl - +ClO - ;

[0063] Although the above chemical reaction is a reversible reaction, the newly generated hydrochloric acid increases the concentration of hydrochloric acid in the mixed solution, causing the reaction between hydrochloric acid and ferric oxide to consume hydrogen ions, and thus the reaction proceeds as shown in the above equation;

[0064] Specific, the stirring component includes rotatingly connected to the communication column 110 on the stirring support column 120, fixed on the stirring support column 120 protection piece 122, the stirring support column 120 both ends are provided with air outlet 121, the stirring support column 120 both sides are fixedly connected with stirring connecting rod 123, the inner diameter of the air outlet 121 of the air outlet is less than the inner diameter of the air inlet, it is worth noting that the stirring support column 120 and the communication column 110 are provided with air-tight pad, ensure that the gas from only from the air outlet 121 flow out, the inner diameter of the air outlet position of the air outlet 121 is less than the inner diameter of the air inlet position, so as to cause the gas speed from the air outlet 121 to be faster; The shape of the stirring connecting rod 123 is arc-shaped, and the concave part of the stirring connecting rod 123 is opposite to the air outlet 121, so that the gas acts on the inside of the stirring connecting rod 123 when it is transmitted from the air outlet 121 to make the stirring connecting rod 123 rotate, the stirring connecting rod 123 wraps the air outlet 121, i.e. the gas discharged from the air outlet 121 directly acts on the stirring connecting rod 123, so that the stirring connecting rod 123 rotates under stress, and the stirring connecting rod 123 is longer, in the process of synchronous rotation of the stirring connecting rod 123 and the air 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 process of discharging gas from the air outlet 121, the outer side inner wall of the stirring connecting rod 123 is rotatably connected with the extension stirring rod 124, the bending degree of the extension 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 communication column 110, the extension stirring rod 124 is stationary on the outer side inner wall of the stirring connecting rod 123; When the stirring connecting rod 123 rotates relative to the communication column 110, the extension stirring rod 124 rotates out of the outer side inner wall of the stirring connecting rod 123, in the process of rotation of the stirring connecting rod 123, the extension stirring rod 124 is subjected to centrifugal force, which makes the extension stirring rod 124 rotate out of the stirring connecting rod 123 under the action of the centrifugal force, thereby improving the stirring range of the stirring component, driving more quartz sand to move, increasing the liquid flow, and making the pickling reaction more thorough; The shape of the protection piece 122 is conical, so that the falling quartz sand scatters around the stirring component, and a blocking film 130 is arranged between the stirring connecting rod 123 and the stirring support column 120, so that the quartz sand does not gather between the stirring connecting rod 123 and the air 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, and the preferred material of the blocking film 130 in the embodiment is a polyimide film coated with an acid-resistant coating on the surface, which is a high molecular material containing stable acyl bonds and imine bonds in its molecular structure. These bonds have high chemical properties, so that polyimide cannot be dissolved or ring-opening reaction in acidic medium;

[0065] Further, the acid washing container 100 is provided with air inlet pipes 101 around the periphery, each of the air inlet pipes 101 is communicated with one of the communication columns 110, and two adjacent communication columns 110 are communicated through a communication pipe 103, so that each of the communication columns 110 is communicated with each other; the air inlet pipe 101 is connected with an external gas booster; it is worth mentioning that the air inlet pipe 101 is also provided with a gas valve, and each of the communication columns 110 is communicated with each other, so that when the gas is transmitted, the gas can be uniformly transmitted from the plurality of stirring components, the stirring range is increased, and the mixing of chlorine and air is also helpful to the input of the acid washing area;

[0066] Further, the discharge container 200 is fixedly connected with a support limiting plate 202 on the inner walls of two sides; the discharge container is rotatably connected with a guide turning plate 210 on the inner walls of the other two sides; the support limiting plate 202 and the guide turning plate 210 are matched with each other, so that the quartz sand is uniformly distributed in the acid washing area of the acid washing container 100; the shape of the support limiting plate 202 is a circular arc plate at the top, and the two sides of the circular arc plate are fixedly connected with extension plates parallel to the side plates of the discharge container 200; it is worth mentioning that the quartz sand poured from the discharge opening of the discharge container 200 is distributed on the two sides of the discharge container 200 through the transmission of the support limiting plate 202, the support limiting plate 202 composed of the circular arc and the extension plates parallel to the side plates of the discharge container 200 can uniformly distribute the quartz sand on the two sides, and the quartz sand can reach the guide turning plate 210; at the beginning, the guide turning plate 210 is perpendicular to the side plate of the discharge container 200, at this time, the quartz sand falls from the guide turning plate 210 and falls in the middle position of the acid washing area, with the rotation of the guide turning plate 210 towards the side plate of the discharge container 200, the falling position of the quartz sand moves from the center of the acid washing area to the two sides, so that the quartz sand is uniformly distributed in the acid washing area, avoiding the accumulation of the quartz sand and affecting the progress of the acid washing; one side of the discharge container 200 is penetrated by a water supply pipe 201, and the water supply pipe 201 is provided with a spray head on part of the discharge container 200, so as to supply water to the acid washing area through the water supply pipe 201 to adjust the pH value; the water supply pipe 201 is connected with an external water source; it is worth mentioning that when more chlorine gas is injected into the acid washing area, in order to avoid the escape of chlorine gas and also to reduce the concentration of hydrochloric acid in the mixed solution in the acid washing area, water is sprayed to the mixed solution through the spray head on the water supply pipe 201, on the one hand, the chlorine gas is contacted to avoid its escape from the discharge container, and on the other hand, the water in the mixed solution is increased, so that the concentration of hydrochloric acid is reduced;

[0067] In addition, the guide deflector plate 210 is fixedly connected with uniformly distributed frosted components on the top; the frosted components comprise a fixed support 212 fixed above the guide deflector plate 210, a rotating support 213 rotating in the fixed support 212, and a rotating sleeve 211 fixed on the rotating support 213, and the rotating sleeve 211 is provided with a frosted layer around; it is to be noted that the quartz sand is polished in the process of sliding from the guide deflector plate 210 to the pickling area, and the quartz sand is polished in the process of sliding from the guide deflector plate 210 to the pickling area, so that the thickness of the impurities on the surface of the quartz sand is reduced, thereby reducing the time required for pickling and improving the practicability of the device.

[0068] A purification and cleaning method of a quartz sand pickling and purification cleaning device, comprising:

[0069] S1: weigh the quartz sand and place it aside, prepare a hydrochloric acid solution with a concentration of 10% as a pickling solution, the weight of the pickling solution is 5% of the weight of the quartz sand, and pour the pickling solution heated to 65℃ into the pickling area in the pickling container 100, and then install the feeding container 200 on the pickling container 100;

[0070] S2: put the quartz sand through the feeding opening of the feeding container 200, and start the guide deflector plate 210, the supporting stop plate 202 distributes the quartz sand on both sides and moves downward, and cooperates with the rotation of the guide deflector plate 210 to uniformly scatter in the pickling area of the pickling container 100, and the chemical reaction in the pickling area is:

[0071] Fe2O3+6HCl→2FeCl3+3H2O;

[0072] 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, turn to S4,

[0073] when the pH value of the mixed solution changes slowly, turn to S5,

[0074] when the pH value of the mixed solution does not change, turn to S6;

[0075] S4: the mixed gas of air and chlorine is filled into the pickling area through the air inlet pipe 101, and the mixed gas acts on the stirring part through the communication 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, and the reaction is as follows:

[0076] Cl2+H2O→HCl+HClO,

[0077] until the pH value of the mixed solution decreases to a proper value, turn to S3;

[0078] S5: air is filled into the inlet pipe 101, the air passes through the communication column 110 and acts on the stirring part to stir the quartz sand in the pickling area until the pH value change rate of the mixed solution is normal, and the process returns to S3;

[0079] S6: the operator removes the discharging container 200, takes out the reacted quartz sand from the pickling container, and washes the pickled quartz sand.

[0080] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced equivalently; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. A quartz sand acid pickling purification cleaning device, characterized in that, comprising an acid pickling container (100), and a discharging container (200) detachably connected with the acid pickling container (100); the acid pickling container (100) is internally provided with a receiving web (102), so that the acid pickling container (100) is divided into two layers; the upper layer of the acid pickling container (100) is an acid pickling area for acid pickling purification of quartz sand; the lower layer of the acid pickling container (100) is a gas transmission area for transmitting gas into the acid pickling area; the bottom inner wall of the acid pickling container (100) is fixedly connected with circumferentially distributed communication columns (110); the communication columns (110) are rotatably connected with stirring components through the top of the receiving web (102), for feeding gas into the acid pickling area and stirring; the two side inner walls of the discharging container (200) are fixedly connected with support limiting plates (202); the other two side inner walls of the discharging container are rotatably connected with guide turning plates (210); the support limiting plates (202) and the guide turning plates (210) cooperate with each other to make the quartz sand evenly fall in the acid pickling area of the acid pickling container (100); the stirring component comprises a stirring support column (120) rotatably connected on the communication column (110), a protection piece (122) fixed on the stirring support column (120), gas outlets (121) arranged at both ends of the stirring support column (120), and stirring connecting rods (123) fixedly connected on both sides of the stirring support column (120); the inner diameter of the gas outlet (121) at the gas outlet is smaller than that at the gas inlet; the stirring connecting rod (123) is arc-shaped, and the concave part of the stirring connecting rod (123) is opposite to the gas outlet (121), so that when the gas is transmitted out of the gas outlet (121), the stirring connecting rod (123) rotates due to the action of the inside of the stirring connecting rod (123); the outside inner wall of the stirring connecting rod (123) is rotatably connected with an extension stirring rod (124), and the bending degree of the extension 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 communication column (110), the extension stirring rod (124) is stationary at the outside inner wall of the stirring connecting rod (123); when the stirring connecting rod (123) rotates relative to the communication column (110), the extension stirring rod (124) rotates out of the outside inner wall of the stirring connecting rod (123); the acid pickling container (100) is provided with gas inlet pipes (101) around, each of the gas inlet pipes (101) is connected with one of the communication columns (110), and adjacent two of the communication columns (110) are connected through a communication pipe (103), so that each of the communication columns (110) is connected with each other; the gas inlet pipe (101) is connected with an external gas booster; the receiving web (102) is provided with a pH sensor for monitoring the pH value of the acid pickling solution; ​ The gas transported by the gas transmission area is air, chlorine or a mixture of the above gases; when the transported gas is air, the gap between the quartz sand in the pickling area is increased; when the transported gas is chlorine, the pH value of the pickling solution in the pickling area is reduced.

2. The quartz sand pickling and purifying cleaning device according to claim 1, characterized in that, the shape of the discharging container (200) is a hollow truncated cone; the shape of the support limiting plate (202) is a circular arc plate at the top, and the two sides of the circular arc plate are fixed with extension plates parallel to the side plates of the discharging container (200).

3. The quartz sand pickling and purifying cleaning device according to claim 2, characterized in that, the shape of the protection piece (122) is a cone, so that the falling quartz sand is scattered around the stirring part.

4. The quartz sand pickling and purifying cleaning device according to claim 3, characterized in that, a blocking film (130) is arranged between the stirring connecting rod (123) and the stirring support column (120) above, so that the quartz sand does not gather between the stirring connecting rod (123) and the air outlet (121).

5. The quartz sand pickling and purifying cleaning device according to claim 4, characterized in that, the top of the guide turning plate (210) is fixedly connected with uniformly distributed sanding assemblies; the sanding assembly comprises a fixed support column (212) fixed above the guide turning plate (210), a rotating support column (213) rotating in the fixed support column (212), and a rotating sleeve (211) fixed on the rotating support column (213), and the rotating sleeve (211) is provided with a sanding layer around.

6. The quartz sand pickling and purifying cleaning device according to claim 5, characterized in that, a water supply pipe (201) penetrates through one side of the discharging container (200), and a nozzle is arranged on part of the discharging container (200) where the water supply pipe (201) is located, 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 with an external water source.

7. A purification and washing method applied to the quartz sand acid washing and purification washing apparatus as claimed in claim 6, characterized in that, including: S1: weigh the quartz sand and place it aside, prepare a hydrochloric acid solution with a concentration of 10% as the pickling solution, the weight of the pickling solution is 5% of the weight of the quartz sand, heat the pickling solution to 65 DEG C and then pour it into the pickling area in the pickling container (100), and then install the discharging container (200) on the pickling container (100); S2: put the quartz sand through the discharging opening of the discharging container (200), and start the guide turning plate (210), the support limiting plate (202) distributes the quartz sand on both sides and moves downward, and cooperates with the rotation of the guide turning plate (210) to uniformly scatter the quartz sand in the pickling area of the pickling container (100), and 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, turn to S4, when the pH value of the mixed solution changes slowly, turn to S5, When the pH value of the mixed solution does not change, go to S6; S4: air and chlorine gas are filled into the inlet pipe (101), the mixed gas passes through the communication column (110) and acts on the stirring part to stir the quartz sand in the pickling area, at the same time, chlorine gas reacts with water in the mixed solution, the reaction is as follows: Cl2+H2O→HCl+HClO, Until the pH value of the mixed solution decreases to a reasonable value, go to S3; S5: air is filled into the inlet pipe (101), the air passes through the communication column (110) and acts on the stirring part to stir the quartz sand in the pickling area, until the pH value of the mixed solution changes normally, go to S3; S6: the staff removes the discharging container (200), takes out the reacted quartz sand from the pickling container, and washes the pickled quartz sand.

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