Quartz sand pickling production line

Abstract

The invention belongs to the technical field of quartz sand pickling equipment, and particularly relates to a quartz sand pickling production line which at least comprises a feeding device for transporting quartz sand to be pickled and is composed of a plurality of production units. Each production unit at least comprises a pickling barrel and a standby pickling barrel which are arranged at the upper part in parallel, two washing barrels arranged below the pickling barrel and the standby pickling barrel, a sand separation box, a settling tank connected with the bottom of the pickling barrel, and an acid preparation tank connected with the settling tank. According to the quartz sand pickling production line, pickling and washing are conducted in the two completely different barrels, pickling and washing can be conducted at the same time, the working efficiency of the pickling barrels is improved, the labor cost is reduced, each production unit is provided with the pickling barrel, the standby pickling barrel and the two washing barrels, and the production efficiency is improved. No matter unexpected problems occur in the acid pickling process or the water washing process, only sand in a single barrel is affected, and the acid pickling process and the water washing process can still be normally operated.

Description

Technical Field

[0001] The invention belongs to the technical field of quartz sand pickling equipment, and in particular relates to a quartz sand pickling production line. Background Art

[0002] Common quartz sand pickling and water washing are both carried out in one barrel. One process is pickling first and then water washing. For example, the device disclosed in the Chinese utility model patent "CN217042780U A pickling device for quartz sand" rinses the quartz sand through the spray pipe in the barrel after the pickling of the quartz sand is completed. Another process is to separate the pickling and water washing areas. For example, the device disclosed in the Chinese invention patent "CN105692629A-A method for quickly cleaning pickled quartz sand" is to separate the inside of the same tank into several layers to separate the water washing and pickling processes.

[0003] However, in actual application, due to the complex impurity composition of quartz sand, HF or HCl must be used during pickling, the impurities of quartz sand contain a lot of Ca elements, and it is easy to harden and form a paste after pickling. The problem with the process of pickling first and then washing with water is that the process of filtering the acid is very time-consuming. If the acid is not filtered thoroughly and then rinsed directly, it will be even more time-consuming. Usually, the 4-hour pickling process corresponds to an 8-hour rinsing process. The problem with the process of separating the pickling and washing areas is that the time used for pickling and washing itself is not equal, the utilization rate of the tank is low, and when the pickling process or the washing process fails or the product quality is unqualified and needs to be inspected and verified, all materials in the tank must be scrapped, and the tank cannot operate without emergency equipment. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a quartz sand pickling production line which divides pickling and water washing into two completely different barrels for processing. Pickling and water washing can be carried out simultaneously, thereby improving the working efficiency of the pickling barrel and reducing labor costs. Each production unit has a pickling barrel, a spare pickling barrel and two water washing barrels. No matter what unexpected problems occur in the pickling process or the water washing process, only the sand in a single barrel is affected, the pickling and water washing processes can still operate normally, and the sliding material transport device can be used to conveniently and quickly feed the materials.

[0005] The specific technical scheme adopted is: a quartz sand pickling production line, which at least includes a feeding device for transporting quartz sand to be pickled, and the production line is composed of multiple production units, each of which at least includes a pickling barrel and a spare pickling barrel arranged in parallel on the top, two water washing barrels arranged below the pickling barrel and the spare pickling barrel, a sand dividing box, a sedimentation tank connected to the bottom of the pickling barrel, and an acid preparation tank connected to the sedimentation tank; the barrel cover of the pickling barrel is provided with a feed port, an inspection port, a water inlet, an acid inlet and an exhaust port, the bottom of the pickling barrel is provided with a discharge port and an acid discharge port, and a filter cloth is fixed in the pickling barrel, and the material gap of the filter cloth can pass the acid but not the quartz The sand filter cloth is provided with a hole corresponding to the position and size of the discharge port; the sand dividing box is arranged in the middle above the two water washing barrels, the sand dividing box has a sand inlet and two sand outlets that can be switched, the sand inlet of the sand dividing box is connected with the discharge port of the pickling barrel, and the sand outlets of the sand dividing box are respectively located at the top edges of the two water washing barrels; the top of the water washing barrel is open, and a circle of overflow grooves is arranged on the top outer wall of the water washing barrel, the top surface of the overflow groove is slightly lower than the top surface of the water washing barrel, and the bottom of the water washing barrel is provided with a number of water nozzles connected to the water inlet pipe, sand outlets and water outlets; the sedimentation tank is connected to the acid discharge port at the bottom of the pickling barrel, and the top of the sedimentation tank is provided with an overflow pipe connected to the acid preparation tank.

[0006] Moreover, the feed port of the pickling barrel is funnel-shaped and arranged at the center of the barrel cover, and the pickling quartz sand enters the pickling barrel from the feed port; the inspection port, water inlet, acid inlet and exhaust port are arranged around the feed port, and a spray pipe connected to the water inlet is provided inside the pickling barrel, and the exhaust port is connected to the alkaline water spray tower located outside the pickling barrel.

[0007] Moreover, the material gap of the filter cloth fixed in the pickling barrel is 5-10mm. The acid that can pass through the material gap of the filter cloth enters the acid discharge port at the bottom of the pickling barrel, and the quartz sand that cannot pass through the material gap of the filter cloth can only enter the discharge port at the bottom of the pickling barrel through the holes in the filter cloth.

[0008] Moreover, the water spouts are rubber water spouts, and the water spouts are arranged at the bottom of the barrel body in the shape of several concentric circles as a whole; the bottom of the washing barrel is provided with installation holes corresponding to the number and positions of the water spouts, and the installation holes are used to install the water spouts.

[0009] Moreover, the sand outlet at the bottom of the water washing bucket is connected to the screening device through a sand pump.

[0010] Moreover, the pickling barrel has a double-layer structure, with the outer layer being iron and the inner layer being acid-resistant plastic; the water washing barrel has a single-layer plastic structure, and the plastic strength of the water washing barrel is greater than the strength of the acid-resistant plastic of the inner layer of the pickling barrel.

[0011] Moreover, it also comprises a first working platform and a second working platform, wherein the first working platform is located on the top of the water washing barrel, and the second working platform is located on the top of the acid washing barrel.

[0012] Moreover, a sliding material transport device including at least a transport track, a conveyor belt and a conveyor belt support frame is provided on the top of the multiple production units. The transport track is arranged along the top of the multiple production units. The conveyor belt can move on the transport track through a pulley and slide rail structure. The conveyor belt can rotate in a cycle and a guide plate is provided under the front end of the conveyor belt to guide the quartz sand into the pickling barrel or spare pickling barrel of the production unit.

[0013] Moreover, the loading device for transporting the quartz sand to be pickled transports the quartz sand to be pickled onto the conveyor belt of the sliding conveyor device.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. Each production unit has a pickling barrel and a spare pickling barrel on the top, and two water washing barrels on the bottom. The pickling barrel and the spare pickling barrel have the same structure. The pickling barrel and the spare pickling barrel can pickle two barrels of sand at the same time, or only one can pickle and the other can be used as a spare for emergency. After pickling, the quartz sand directly enters the water washing barrel for water washing, so that the pickling and water washing processes do not affect each other.

[0016] 2. For quartz sand with high Ca content in impurities and easy to form paste after pickling, the leaching process of 4 hours of pickling process usually takes 8 hours (including acid filtration and leaching time), that is, the time for the pickling barrel to wait for the next batch of materials for pickling is twice the actual pickling time. Since this production line separates the pickling barrel and the water washing barrel, it saves the waiting process for water washing and actually improves the working efficiency of the pickling barrel by three times. Since the industry is used to assign one employee to each pickling barrel to be responsible for guarding and operating, the number of employees required is reduced to one third of the original.

[0017] 3. A filter cloth is fixed in the pickling barrel. The material gap of the filter cloth can pass the acid but not the quartz sand, and is used for filtering the acid after pickling. Even if the impurities of the quartz sand contain a lot of Ca elements and are easy to form a paste after pickling, there is no need to filter the acid thoroughly. Since the filter cloth is provided with a hole corresponding to the position and size of the discharge port, the discharge port is opened to allow the quartz sand to form a paste after pickling directly from the hole of the filter cloth into the sand box and even the washing barrel. The time required for thorough acid filtering in the pickling barrel is saved, and the pickling barrel is kept in working condition as much as possible.

[0018] 4. A sliding material transport device is provided on the top of multiple production units. The transport track is set along the top of multiple production units. The conveyor belt can move on the transport track through the pulley and slide rail structure. According to production needs, the conveyor belt is moved to the top of the pickling barrel or spare pickling barrel of the corresponding production unit to realize the feeding of the quartz sand to be pickled. This solves the problem of equipping each pickling tank with a loading device in the prior art.

[0019] 5. The water inlet structure from top to bottom during the washing process is improved to a water inlet structure from bottom to top, so that the washing efficiency is improved. By arranging a large number of water nozzles in the shape of several concentric circles at the bottom of the washing barrel, the water inlet is evenly distributed at the bottom of the barrel. The water nozzle structure and arrangement design of the washing barrel make the water flow and the natural gravity of the sand form a recoil, which is more conducive to uniformly washing the quartz sand. At the same time, since the washing barrel does not directly enter the acid, compared with the existing technology of acid washing and water washing in one barrel at the same time, the washing barrel does not have a large amount of acid, so the top of the barrel can be set to open, and the quartz sand cleaning situation can be directly checked at any time during the washing process, and the water intake and washing time can be adjusted in real time. The double-layer structure design of the upper sieve plate layer and the lower bottom plate layer makes the installation position of the sand outlet and the water outlet more reasonable, and also provides an installation position for the water inlet pipe and the support column. The reinforcing ribs and support columns enhance the structural strength of the washing barrel from the inside to the outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of a production unit of a quartz sand pickling production line;

[0021] Figure 2 It is a schematic diagram of the pickling barrel structure;

[0022] Figure 3 This is a schematic diagram of the filter cloth and discharge port structure in the pickling barrel;

[0023] Figure 4 It is a schematic diagram of the structure of the pickling barrel, spare pickling barrel and two water washing barrels of a production unit;

[0024] Figure 5 This is a schematic diagram of the water washing barrel structure;

[0025] Figure 6 This is a schematic diagram of the bottom structure of the water washing barrel when viewed from above;

[0026] Figure 7 It is a schematic diagram of the structure of the upper sieve plate layer and the lower bottom plate layer at the bottom of the water washing barrel;

[0027] Figure 8 It is a schematic diagram of the structure of the sliding material transport device;

[0028] Description of reference numerals:

[0029] Acid washing barrel 1, spare acid washing barrel 2, water washing barrel 3, sand distribution box 4, sedimentation tank 5, acid preparation tank 6, feed port 7, inspection port 8, water inlet 9, acid inlet 10, exhaust port 11, discharge port 12, acid discharge port 13, spray pipe 14, alkaline water spray tower 15, filter cloth 16, hole 17, layering strip 18, pressure pipe 19, sand outlet 20, overflow trough 21, top of water washing barrel 22, water inlet pipe 23, solenoid valve 24, sand outlet 25, water nozzle 26, reinforcement rib 27, overflow pipe 28, sand pump 29, water tank 30, transport track 31, pulley slide rail structure 32, conveyor belt 33, guide plate 34, conveyor belt support frame 35, sliding material transport device 36, upper sieve plate layer 37, lower bottom plate layer 38, water outlet 39, support column 40. DETAILED DESCRIPTION

[0030] The present invention is described in detail below with reference to the accompanying drawings and embodiments, but the content of the present invention is not limited to the following embodiments.

[0031] A quartz sand pickling production line comprises at least a feeding device for transporting quartz sand to be pickled. The production line is composed of a plurality of production units, each of which is as follows: Figure 1 The figure at least includes a pickling barrel 1 and a spare pickling barrel 2 arranged in parallel at the top, two water washing barrels 3 arranged below the pickling barrel and the spare pickling barrel, a sand dividing box 4, a sedimentation tank 5 connected to the bottom of the pickling barrel, and an acid preparation tank 6 connected to the sedimentation tank; the pickling barrel and the spare pickling barrel have the same structure, and the pickling barrel and the spare pickling barrel can pickle two barrels of sand respectively at the same time, or only one can pickle and the other can be used as a standby for emergency.

[0032] like Figure 2 As shown, the pickling barrel cover is provided with a feed port 7, an inspection port 8, a water inlet 9, an acid inlet 10 and an exhaust port 11. The feed port 7 of the pickling barrel is funnel-shaped and arranged at the center of the barrel cover. The pickling quartz sand enters the pickling barrel from the feed port. The bottom of the pickling barrel is provided with a discharge port 12 and an acid discharge port 13. The inspection port, the water inlet, the acid inlet and the exhaust port are arranged around the feed port. Figure 1 As shown, a spray pipe 14 connected to the water inlet is also provided inside the pickling barrel, and the spray pipe is connected to the water inlet, and the exhaust port is connected to the alkaline water spray tower 15 located outside the pickling barrel. In order to spray the acid and quartz sand remaining on the barrel wall, the spray pipe is an indispensable structure in the pickling barrel structure. Therefore, a water nozzle structure at the bottom of the water washing barrel similar to the present scheme will not be set in the pickling barrel, so the pickling barrel and the water washing barrel cannot replace each other.

[0033] like Figure 3As shown, a filter cloth 16 is fixed in the pickling barrel, and the material gap of the filter cloth can pass acid but cannot pass quartz sand. The filter cloth is provided with a hole 17 corresponding to the position and size of the discharge port. The filter cloth near the inner wall of the pickling barrel is fixed by a layering strip 18 that is annular as a whole, and the hole of the filter cloth located at the discharge port is fixed by a pressure pipe 19 with a broken line shape in the longitudinal section. The material gap of the filter cloth fixed in the pickling barrel is 5 to 10 mm. The acid that can pass through the material gap of the filter cloth enters the bottom of the pickling barrel and is discharged from the acid discharge port 13. Because the impurities of quartz sand contain a lot of Ca elements and the quartz sand is hardened and paste-like after pickling, it does not need to be completely filtered, and directly enters the sand separation box 4 or even the water washing barrel from the hole 17 of the filter cloth. The time required for thorough acid filtering in the pickling barrel is saved, so that the pickling barrel is in working condition as much as possible.

[0034] like Figure 4 The sand dividing box 4 shown is arranged in the middle above the two water washing barrels 3. The sand dividing box has a sand inlet and two sand outlets 20 that can be switched. The switch of the sand outlet is a cover plate or a solenoid valve. The sand inlet of the sand dividing box is connected to the discharge port of the pickling barrel, and the sand outlet of the sand dividing box is respectively located at the top edges of the two water washing barrels.

[0035] Washing bucket Figure 5 and Figure 1 As shown, the top 22 of the water washing bucket is open, and a circle of overflow grooves 21 are provided on the top outer wall of the water washing bucket. The top surface of the overflow groove is slightly lower than the top surface of the water washing bucket. The bottom of the water washing bucket is provided with a plurality of water nozzles connected to the water inlet pipe, and the water nozzles are connected to the water inlet pipe 23. The water inlet pipe is connected to the water tank 30. The water in the water inlet pipe enters the quartz sand water washing bucket through the water nozzles. The water inlet pipe is provided with a solenoid valve 24. The sand outlet 25 at the bottom of the water washing bucket is connected to the screening device through the sand pump 29 and the screening device, so that the washed sand enters the screening device for screening or is sent to the thickening bucket for further solid-liquid separation. Since the water washing bucket does not directly enter the acid, compared with the prior art of simultaneously performing acid washing and water washing in one bucket, the water washing bucket does not have a large amount of acid liquid, so the top of the barrel body can be set to be open, and the quartz sand cleaning situation can be directly checked at any time during the water washing process, and the water intake and water washing time can be adjusted in real time.

[0036] The overflow groove on the top outer wall of the washing bucket is annular, and the top surface of the overflow groove is 3 to 5 cm lower than the top surface of the bucket body, ensuring that the water entering the overflow groove will not flow back into the bucket body. When there is too much water in the bucket and it overflows from the top, the water will flow into the overflow groove, leaving time for the staff to close the water inlet pipe.

[0037] Figure 6The bottom structure of the washing bucket is shown as seen from above. The water spout 26 cannot be actually seen from the upward angle. Its position is drawn in the figure to show its arrangement. The water spout is a rubber water spout, which is arranged at the bottom of the barrel in a shape of several concentric circles. When no water is in, the water spout is closed. The bottom of the washing bucket is provided with mounting holes corresponding to the number and position of the water spouts. The mounting holes are used to install the rubber water spouts. In order to strengthen the structural strength of the washing bucket, a circle of reinforcing ribs 27 is provided at the bottom of the washing bucket. The water discharged from the washing bucket and the water overflowed from the overflow tank are transported to the acid wastewater pool for centralized neutralization, recycling or treatment.

[0038] Moreover, if Figure 7 The bottom of the washing bucket shown in the figure has an upper sieve plate layer 37 and a lower bottom plate layer 38, one end of the sand outlet 25 of the washing bucket is arranged on the upper sieve plate layer, one end of the water outlet 39 of the washing bucket is arranged on the lower bottom plate layer, a number of support columns are arranged in the middle of the bottom of the bucket body, the water inlet pipe 23 and the support column 40 are arranged between the upper sieve plate layer and the lower bottom plate layer, and a circle of reinforcing ribs 27 are arranged on the bottom inner wall of the bucket body. The upper sieve plate layer has sieve holes for easy water filtering, and the double-layer structure design of the upper sieve plate layer and the lower bottom plate layer makes the installation position of the sand outlet and the water outlet more reasonable, and also provides installation positions for the water inlet pipe and the support column. The reinforcing ribs and the support column enhance the structural strength of the washing bucket from the inside to the outside.

[0039] The sedimentation tank is connected to the acid discharge port at the bottom of the pickling barrel. The top of the sedimentation tank is provided with an overflow pipe 28 connected to the acid preparation tank for recovering and recycling the acid discharged from the pickling barrel.

[0040] Moreover, the pickling barrel has a double-layer structure, with an outer layer of iron and an inner layer of acid-resistant plastic. Because the strength of the acid-resistant plastic is insufficient, the outer layer needs to be covered with iron to increase the strength; the water washing barrel has a single-layer plastic structure, and the plastic strength of the water washing barrel is greater than the strength of the acid-resistant plastic in the inner layer of the pickling barrel. The plastic material for making the water washing barrel only needs to consider strength and has low requirements for acid resistance.

[0041] Moreover, in order to facilitate the operation and observation of employees, a first working platform and a second working platform need to be constructed. The first working platform is located on the top of the water washing barrel, and the second working platform is located on the top of the pickling barrel.

[0042] Figure 8The figure shows a schematic diagram of the structure of a sliding material transport device. A sliding material transport device 36 including at least a transport track, a transport belt and a transport belt support frame is provided on the top of multiple production units. The transport track 31 is provided along the top of multiple production units and fixed on the second working platform. The transport belt can move on the transport track through a pulley rail structure 32. The transport belt 33 can circulate and rotate. A guide plate 34 is provided below the front end of the transport belt to guide the quartz sand into the pickling barrel or spare pickling barrel of the production unit. The motor driving the conveyor belt is fixed on the conveyor belt support frame 35 at the front end of the conveyor belt. The motor rotating shaft is connected to the conveyor belt 4 to provide power for the circulatory rotation of the conveyor belt.

[0043] During use, since the pickling tank and the water washing tank can work at the same time, when the first batch of pickled sand enters the water washing tank, the pickling tank can start pickling the second batch of sand. The nozzle structure and layout design of the water washing tank make the water flow and the natural gravity of the sand form a recoil, and the water inlet structure from top to bottom in the water washing process is improved to a water inlet structure from bottom to top, which not only washes the sand evenly but also significantly shortens the sand washing time. Usually, the pickling process of 4 hours of process corresponds to the leaching process that takes 8 hours to clean, but after the improvement, it only takes 2 to 3 hours to clean. Since the industry is used to assign one employee to each pickling tank to be responsible for guarding the operation, the number of employees required is reduced to one third of the original under the same output. At the same time, since each production unit is equipped with a pickling tank and a spare pickling tank with the same structure, no matter any pickling tank or water washing tank fails or the sand quality is unqualified and needs to be checked and verified, there is another pickling tank or water washing tank to ensure that the production unit can continue to produce without being affected, while the commonly used pickling and water washing integrated tank will cause the production line to stop once any link fails.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] 1. For quartz sand with high Ca content and easy to form paste after pickling, the 4-hour pickling process usually requires 8 hours of leaching (including acid filtration and leaching time). After adopting this production line, the 4-hour pickling process is shortened to only 2-3 hours. At the same time, since the pickling tank and the water washing tank are separated, the waiting process for water washing is saved, and the working efficiency of the pickling tank is actually increased by three times. Since the industry is used to assign one employee to each pickling tank to be responsible for guarding the operation, the number of employees required is reduced to one third of the original.

[0046] 2. Each production unit has a pickling barrel and a spare pickling barrel on the top, and two water washing barrels on the bottom. The pickling barrel and the spare pickling barrel have the same structure. The pickling barrel and the spare pickling barrel can pickle two barrels of sand at the same time, or only one can pickle and the other can be used as a spare for emergency. After pickling, the quartz sand directly enters the water washing barrel for water washing, so that the pickling and water washing processes do not affect each other.

[0047] 3. A filter cloth is fixed in the pickling barrel. The material gap of the filter cloth can pass the acid but not the quartz sand, and is used for filtering the acid after pickling. Even if the impurities of the quartz sand contain a lot of Ca elements and are easy to form a paste after pickling, there is no need to filter the acid thoroughly. Since the filter cloth is provided with a hole corresponding to the position and size of the discharge port, the discharge port is opened to allow the quartz sand to form a paste after pickling directly from the hole of the filter cloth into the sand box and even the washing barrel. The time required for thorough acid filtering in the pickling barrel is saved, and the pickling barrel is kept in working condition as much as possible.

[0048] 4. A sliding material transport device is provided on the top of multiple production units. The transport track is set along the top of multiple production units. The conveyor belt can move on the transport track through the pulley and slide rail structure. According to production needs, the conveyor belt is moved to the top of the pickling barrel or spare pickling barrel of the corresponding production unit to realize the feeding of the quartz sand to be pickled. This solves the problem of equipping each pickling tank with a loading device in the prior art.

[0049] 5. The water inlet structure from top to bottom during the washing process is improved to a water inlet structure from bottom to top, so that the washing efficiency is improved. By arranging a large number of water nozzles in the shape of several concentric circles at the bottom of the washing barrel, the water inlet is evenly distributed at the bottom of the barrel. The water nozzle structure and arrangement design of the washing barrel make the water flow and the natural gravity of the sand form a recoil, which is more conducive to uniformly washing the quartz sand. At the same time, since the washing barrel does not directly enter the acid, compared with the existing technology of acid washing and water washing in one barrel at the same time, the washing barrel does not have a large amount of acid, so the top of the barrel can be set to open, and the quartz sand cleaning situation can be directly checked at any time during the washing process, and the water intake and washing time can be adjusted in real time. The double-layer structure design of the upper sieve plate layer and the lower bottom plate layer makes the installation position of the sand outlet and the water outlet more reasonable, and also provides an installation position for the water inlet pipe and the support column. The reinforcing ribs and support columns enhance the structural strength of the washing barrel from the inside to the outside.

Claims

1. A quartz sand pickling production line, comprising at least a feeding device for transporting quartz sand to be pickled, characterized in that: The production line is composed of multiple production units, each of which at least includes a pickling barrel and a spare pickling barrel arranged in parallel on the top, two water washing barrels arranged below the pickling barrel and the spare pickling barrel, a sand dividing box, a sedimentation tank connected to the bottom of the pickling barrel, and an acid preparation tank connected to the sedimentation tank; the barrel cover of the pickling barrel is provided with a feed inlet, an inspection port, a water inlet, an acid inlet and an exhaust port, the bottom of the pickling barrel is provided with a discharge port and an acid discharge port, a filter cloth is fixed in the pickling barrel, the material gap of the filter cloth can pass acid but not quartz sand, and the filter cloth is provided with a relative position and size to the discharge port The sand dividing box is arranged in the middle above the two water washing barrels, and has a sand inlet and two sand outlets which can be switched. The sand inlet of the sand dividing box is connected with the discharge port of the pickling barrel, and the sand outlets of the sand dividing box are respectively located at the top edges of the two water washing barrels; the top of the water washing barrel is open, and a circle of overflow grooves is arranged on the top outer wall of the water washing barrel, and the top surface of the overflow grooves is slightly lower than the top surface of the water washing barrel, and the bottom of the water washing barrel is provided with a number of water nozzles connected with the water inlet pipe, sand outlets and water outlets; the sedimentation tank is connected with the acid discharge port at the bottom of the pickling barrel, and the top of the sedimentation tank is provided with an overflow pipe connected with the acid preparation tank.

2. A quartz sand pickling production line according to claim 1, characterized in that: The feed port of the pickling barrel is funnel-shaped and arranged at the center of the barrel cover, and the pickling quartz sand enters the pickling barrel from the feed port; the inspection port, water inlet, acid inlet and exhaust port are arranged around the feed port, and a spray pipe connected to the water inlet is arranged inside the pickling barrel, and the exhaust port is connected to the alkaline water spray tower located outside the pickling barrel.

3. A quartz sand pickling production line according to claim 1, characterized in that: The material gap of the filter cloth fixed in the pickling barrel is 5-10mm. The acid that can pass through the material gap of the filter cloth enters the acid discharge port at the bottom of the pickling barrel, and the quartz sand that cannot pass through the material gap of the filter cloth can only enter the discharge port at the bottom of the pickling barrel through the holes in the filter cloth.

4. A quartz sand pickling production line according to claim 1, characterized in that: The water spouts are rubber water spouts, and the water spouts are arranged at the bottom of the barrel body in the shape of several concentric circles as a whole; the bottom of the washing barrel is provided with installation holes corresponding to the number and positions of the water spouts, and the installation holes are used to install the water spouts.

5. A quartz sand pickling production line according to claim 1, characterized in that: The sand outlet at the bottom of the washing bucket is connected to the screening device through a sand pump.

6. A quartz sand pickling production line according to claim 1, characterized in that: The pickling barrel has a double-layer structure, with the outer layer being iron and the inner layer being acid-resistant plastic; the water washing barrel has a single-layer plastic structure, and the plastic strength of the water washing barrel is greater than the strength of the acid-resistant plastic of the inner layer of the pickling barrel.

7. A quartz sand pickling production line according to claim 1, characterized in that: It also includes a first working platform and a second working platform, wherein the first working platform is located on the top of the water washing barrel, and the second working platform is located on the top of the acid washing barrel.

8. A quartz sand pickling production line according to claim 1, characterized in that: A sliding material transport device including at least a transport track, a transport belt and a transport belt support frame is provided on the top of the multiple production units. The transport track is arranged along the top of the multiple production units. The transport belt can move on the transport track through a pulley rail structure. The conveyor belt can rotate in a cycle and a guide plate is provided under the front end of the conveyor belt to guide the quartz sand into the pickling barrel or spare pickling barrel of the production unit.

9. A quartz sand pickling production line according to claim 8, characterized in that: The loading device for transporting the quartz sand to be pickled transports the quartz sand to be pickled to the conveyor belt of the sliding conveyor device.

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