Bottom-entry acid pickling tank

Abstract

This invention discloses a bottom-feed acid pickling tank, comprising a tank body with a liquid outlet at the top and a conical bottom. The bottom of the tank body has a sand discharge port and a liquid discharge port, with a filter at the liquid discharge port. An acid supply assembly is located on the inner bottom of the tank body, surrounding the sand discharge port and liquid discharge port. The acid supply assembly includes multiple acid spray pipes, each with multiple acid spray ports. By setting acid spray pipes at the bottom of the tank body and a liquid outlet at the top, acid can be supplied into the tank body through the acid spray pipes during pickling. The acid flows from bottom to top and is then discharged from the liquid outlet. The upward flow of the acid has an upward scouring effect on the quartz sand, effectively agitating it and dispersing it. This results in a larger contact area between the quartz sand and the acid, leading to a better pickling effect.

Description

Technical Field

[0001] This invention relates to the field of pickling technology, and in particular to a bottom-feed pickling tank. Background Technology

[0002] To obtain high-purity quartz sand, it needs to be acid-washed. Acid washing of quartz sand requires an acid washing tank. In a conventional tank, the acid enters from the top and exits from the bottom. However, in practice, such acid washing tanks have some shortcomings. For example, because the acid flows from top to bottom, the quartz sand, in addition to its own gravity, is also subjected to the downward scouring force of the acid, causing the quartz sand to be tightly packed. This results in a small contact area between the quartz sand and the acid, thus reducing the effectiveness of the acid washing. Furthermore, the quartz sand is pressed tightly onto the filter cloth, making the filter cloth prone to clogging. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a bottom-feed acid pickling tank.

[0004] According to an embodiment of the present invention, a bottom-feed acid pickling tank includes a tank body, a liquid outlet at the top of the tank body, a conical bottom of the tank body, a sand discharge port and a liquid discharge port at the bottom of the tank body, and a filter at the liquid discharge port; an acid supply assembly is provided on the inner bottom of the tank body, the acid supply assembly is arranged around the sand discharge port and the liquid discharge port, and the acid supply assembly includes a plurality of acid spray pipes, each of the acid spray pipes having a plurality of acid spray ports.

[0005] The bottom-feed acid pickling tank according to embodiments of the present invention has at least the following technical effects: By setting an acid spray pipe at the bottom of the tank and a liquid outlet at the top of the tank, acid can be supplied into the tank from the acid spray pipe during pickling. The acid flows from bottom to top and is then discharged from the liquid outlet. The acid flows from bottom to top, and the acid has an upward flushing effect on the quartz sand, which is equivalent to agitating the quartz sand, making the quartz sand more dispersed, and increasing the contact area between the quartz sand and the acid, resulting in a better pickling effect. By setting an acid supply component around the sand discharge port and the liquid discharge port, a small amount of acid or water can be introduced through the acid supply component during sand discharge, enhancing the fluidity of the quartz sand at the bottom of the tank and promoting the flow of the quartz sand at the bottom of the tank towards the sand discharge port, thereby driving all the quartz sand to flow towards the sand discharge port, which can greatly improve the sand discharge efficiency without the need to introduce a large amount of acid or water.

[0006] According to some embodiments of the present invention, the drain port and the filter are collectively referred to as a drain structure, and there are multiple drain structures arranged around the sand discharge port. During sand discharge, the quartz sand flows along the conical bottom of the tank, first flowing to the drain structure and then to the sand discharge port, so that residual acid in the quartz sand can be discharged from the drain structure, reducing the amount of acid in the quartz sand discharged from the sand discharge port, thus facilitating the subsequent quartz sand washing process.

[0007] According to some embodiments of the present invention, the filter includes a filter cartridge disposed above the drain port. By arranging the filter cartridge to protrude upwards from the drain port, the filtration area is increased, thereby improving the filtration efficiency.

[0008] According to some embodiments of the present invention, the filter further includes a filter cloth covering the outside of the filter cartridge, the filter cloth being detachably connected to the filter cartridge. This prevents quartz sand from clogging the filter cartridge, and the detachable connection of the filter cloth to the filter cartridge facilitates filter cloth replacement.

[0009] According to some embodiments of the present invention, the acid spraying pipe extends along the generatrix of the bottom of the tank, and the acid supply assembly includes an acid supply pipe in a ring shape, with one end of the acid spraying pipe connected to the acid supply pipe. By setting the ring-shaped acid supply pipe, acid can be supplied to each acid spraying pipe, eliminating the need for each acid spraying pipe to be connected to the outside of the tank, resulting in a reasonable and compact structure.

[0010] According to some embodiments of the present invention, the tank is provided with a plurality of vertically arranged side-outlet acid pipes, which are located on the side wall of the tank, and each side-outlet acid pipe has a plurality of side-outlet acid ports. During pickling, acid can be added into the tank through the side-outlet acid pipes, so that acid is sprayed out from the bottom and all sides of the tank, which improves the agitation effect on the quartz sand in the tank.

[0011] According to some embodiments of the present invention, the tank body is provided with a top-in acid pipe, which is annular, and the top end of the side-out acid pipe is connected to the top-in acid pipe. By setting the annular top-in acid pipe, acid can be supplied to each side-out acid pipe by supplying acid to the top-in acid pipe, without each side-out acid pipe needing to be connected to the outside of the tank body, resulting in a reasonable and compact structure.

[0012] According to some embodiments of the present invention, the acid spraying port is provided with a nozzle, which unidirectionally guides the flow away from the acid spraying pipe. By providing a nozzle, the acid spraying port can be closed when acid spraying is not required, thus preventing quartz sand from entering the acid spraying pipe from the port and causing blockage.

[0013] According to some embodiments of the present invention, the nozzle is detachably connected to the acid spray tube. This facilitates nozzle replacement.

[0014] According to some embodiments of the present invention, the area between adjacent acid spray pipes is referred to as a first region, and the nozzle is disposed within the first region. This lower nozzle height facilitates the agitation of the quartz sand located at the bottom of the tank by the acid sprayed from the nozzle.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of the bottom-feed acid pickling tank according to an embodiment of the present invention.

[0018] Figure 2 yes Figure 1 A three-dimensional structural diagram of the nozzle.

[0019] In the attached image:

[0020] 100-Tank body; 110-Support; 120-Liquid outlet; 130-Sand discharge port; 210-Acid spray pipe; 220-Acid supply pipe; 230-Nozzle; 231-Acid spray channel; 232-Valve; 233-Installation gap; 310-Side acid outlet pipe; 320-Top acid inlet pipe; 410-Filter cartridge. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the invention and for simplifying the description, and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number, while "above," "below," "within," etc., are understood to include the stated number. If "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0023] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0024] Reference below Figure 1 and Figure 2 A bottom-feed acid pickling tank according to an embodiment of the present invention is described.

[0025] The bottom-feed acid pickling tank of this invention includes a tank body 100. The top of the tank body 100 is provided with a liquid outlet 120. The bottom of the tank body 100 is conical. The bottom of the tank body 100 is provided with a sand discharge port 130 and a liquid discharge port. The liquid discharge port is provided with a filter. An acid supply assembly is provided on the inner bottom of the tank body 100. The acid supply assembly is arranged around the sand discharge port 130 and the liquid discharge port. The acid supply assembly includes a plurality of acid spray pipes 210. Each acid spray pipe 210 is provided with a plurality of acid spray ports.

[0026] For example, such as Figure 1 As shown, the tank 100 is a vertically arranged cylindrical shape. The bottom of the tank 100 slopes downward from the outer periphery to the center, forming a funnel / cone shape. The sand discharge port 130 and the liquid discharge port are both located at the center of the bottom of the tank 100, that is, at the lowest point inside the tank 100. The multiple acid spraying pipes 210 can be arranged in a grid pattern or radially. The multiple acid spraying pipes 210 are arranged around the liquid discharge port and the sand discharge port 130, so that the acid sprayed by the acid spraying pipes 210 can be flushed in the direction of the liquid discharge port and the sand discharge port 130. During use, a sand discharge pipe is connected to the outside of the tank 100 at the sand discharge port 130, and a drain pipe is connected to the outside of the tank 100 at the drain port. The sand discharge pipe is equipped with a sand discharge valve, and the drain pipe is equipped with a drain valve. During pickling, the sand discharge valve and the drain valve are closed to prevent the discharge of quartz sand and acid. The tank 100 can also be equipped with a sand inlet at the top to facilitate the addition of quartz sand into the tank, and a mist outlet at the top to collect acid mist for unified treatment.

[0027] By setting an acid spray pipe 210 at the bottom of the tank 100 and an outlet 120 at the top of the tank 100, acid can be supplied into the tank 100 from the acid spray pipe 210 during pickling. The acid flows from bottom to top and is then discharged from the outlet 120. The acid discharged from the outlet 120 can be recycled. The acid flows from bottom to top and has an upward flushing effect on the quartz sand, which is equivalent to agitating the quartz sand, making the quartz sand more dispersed. The contact area between the quartz sand and the acid is larger, resulting in a better pickling effect. After pickling is complete, the acid supply is stopped, and then the drain valve is opened to allow the remaining acid in tank 100 to be discharged from the drain port. Then, the sand discharge valve is opened to allow the quartz sand to be discharged from the sand discharge port 130. By setting the bottom of tank 100 to be conical, it is beneficial for the acid and quartz sand to be discharged from the acid discharge port and sand discharge port 130 under their own gravity. By setting the acid supply component in a ring around the sand discharge port 130 and the drain port, a small amount of acid or water can be introduced through the acid supply component during sand discharge to enhance the fluidity of the quartz sand at the bottom of tank 100 and promote the flow of the quartz sand at the bottom of tank 100 towards the sand discharge port 130, thereby driving all the quartz sand to flow towards the sand discharge port 130. This can greatly improve the sand discharge efficiency without the need to introduce a large amount of acid or water.

[0028] In some embodiments of the present invention, the drain port and the filter are collectively referred to as a drain structure. Multiple drain structures are arranged around the sand discharge port 130. There may be four drain structures, located in front of, behind, to the left of, and to the right of the sand discharge port 130. The height of the drain port and the sand discharge port 130 may be the same, or the height of the sand discharge port 130 may be lower than that of the drain port. During sand discharge, the quartz sand flows along the conical bottom of the tank, first flowing to the drain structure and then to the sand discharge port 130. This allows residual acid in the quartz sand to be discharged from the drain structure, reducing the amount of acid discharged from the sand discharge port 130, thus facilitating the subsequent quartz sand rinsing process.

[0029] In some embodiments of the present invention, the filter includes a filter cartridge 410, which is disposed above the drain port. The filter cartridge 410 is a vertically arranged cylindrical shape with an open bottom. The bottom edge of the filter cartridge 410 is sealed to the edge of the drain port. Multiple filter holes are evenly distributed on the side walls and top walls of the filter cartridge 410. By setting the filter cartridge 410 to protrude upward from the drain port, the filtration area is increased, the filtration efficiency is improved, and the problem of quartz sand falling into the drain port and getting stuck in the drain port and unable to be discharged from the sand discharge port 130 is avoided. When the quartz sand flows along the bottom of the tank 100, it will be squeezed to both sides of the filter cartridge 410 due to the obstruction of the filter cartridge 410, which is beneficial for separating the acid in the quartz sand.

[0030] In some embodiments of the present invention, the filter further includes a filter cloth, which covers the outside of the filter cartridge 410 and is detachably connected to the filter cartridge 410. The filter cloth can be a filter bag, which is fitted over the outside of the filter cartridge 410 from top to bottom. The opening of the filter bag is sealed to the bottom of the filter cartridge 410 by a binding method, thus achieving a detachable connection between the filter bag and the filter cartridge 410. This prevents quartz sand from clogging the filter cartridge 410, and the detachable connection between the filter cloth and the filter cartridge 410 facilitates filter cloth replacement. The top of the filter is higher than the acid spray pipe 210. During acid washing, the acid around the filter flows upward, which is equivalent to the acid washing the filter cloth on the filter surface, causing the quartz sand adhering to the filter cloth to fall off. The filter cloth is less prone to clogging, reducing the frequency of filter cloth replacement and improving economic efficiency.

[0031] In some embodiments of the present invention, the acid spraying pipe 210 extends along the generatrix direction of the bottom of the tank 100, and the acid supply assembly includes an acid supply pipe 220, which is annular, and one end of the acid spraying pipe 210 is connected to the acid supply pipe 220. The acid supply pipe 220 is close to the side wall of the tank 100. The end of the acid spray pipe 210 away from the sand discharge port 130 is connected to the acid supply pipe 220. The end of the acid spray pipe 210 near the sand discharge port 130 is provided with a cap. The cap can be equipped with a nozzle 230 so that acid can also be sprayed at the cap. Of course, the cap can also be without a nozzle 230. The acid supply pipe 220 is provided with a first pipe that connects to the outside of the tank 100. The first pipe can penetrate the side wall of the tank 100 radially, and the first pipe can also extend upward to the top of the tank 100. By setting an annular acid supply pipe 220, acid can be supplied to the acid supply pipe 220 so that the acid can reach each acid spray pipe 210. It is not necessary for each acid spray pipe 210 to be connected to the outside of the tank 100. The structure is reasonable and compact.

[0032] In some embodiments of the present invention, the tank 100 is provided with a plurality of vertically arranged side-outlet acid pipes 310, which are located on the side wall of the tank 100. Each side-outlet acid pipe 310 has a plurality of side-outlet acid ports. During pickling, acid can be added into the tank 100 through the side-outlet acid pipes 310, so that acid is sprayed out from the bottom and sides of the tank 100, which improves the agitation effect on the quartz sand inside the tank 100.

[0033] In some embodiments of the present invention, a top-feed acid pipe 320 is provided inside the tank 100. The top-feed acid pipe 320 is annular, and the top end of the side-discharge acid pipe 310 is connected to the top-feed acid pipe 320. The structure of the side-discharge acid pipe 310 can be the same as the structure of the spray acid pipe 210, and the structure of the top-feed acid pipe 320 can be the same as the structure of the supply acid pipe 220. By setting the annular top-feed acid pipe 320, acid can be supplied to the top-feed acid pipe 320 so that the acid reaches each side-discharge acid pipe 310, without each side-discharge acid pipe 310 needing to be connected to the outside of the tank 100, resulting in a reasonable and compact structure.

[0034] In some embodiments of the present invention, the acid spraying port is provided with a nozzle 230, which unidirectionally flows away from the acid spraying pipe 210. By providing the nozzle 230, the acid spraying port can be closed when acid spraying is not required, avoiding the problem of quartz sand entering the acid spraying pipe 210 from the acid spraying port and causing blockage of the acid spraying pipe 210. The nozzle 230 can also be provided at the side outlet of the acid spraying port. The nozzle 230 can be a one-way valve; the nozzle 230 can also be a component of rubber or other elastic materials, see reference. Figure 2 The nozzle 230 has an acid spraying channel 231, which has an acid inlet end and an acid outlet end. The acid spraying direction is the position of the acid outlet end relative to the acid inlet end. The acid outlet end has multiple valves 232. The multiple valves 232 abut against each other, so that the inner radial direction of the acid spraying direction of the acid outlet end gradually decreases until it is closed. When acid spraying is required, the pressure of the acid liquid opens the acid outlet end, so that the acid liquid can be sprayed out smoothly. The outer side of the nozzle 230 has two baffles. The two baffles are spaced apart along the acid spraying direction, and the two baffles form an installation gap 233. During assembly, the edge of the acid spraying port is placed in the installation gap 233, thus realizing the connection between the nozzle 230 and the acid spraying port. Since the nozzle 230 is an elastic component, the nozzle 230 can be removed from the acid spraying port by squeezing the nozzle 230, thus realizing the detachable connection between the nozzle 230 and the acid spraying port. Of course, the nozzle 230 and the acid spraying port can also be detachably connected by threaded connection, pin connection or other suitable methods.

[0035] In some embodiments of the present invention, the nozzle 230 is detachably connected to the acid spray pipe 210. This facilitates the replacement of the nozzle 230.

[0036] In some embodiments of the present invention, the area between adjacent acid spray pipes 210 is referred to as a first area, and the nozzle 230 is disposed within the first area. This lower height of the nozzle 230 facilitates the agitation of the quartz sand at the bottom of the tank 100 by the acid sprayed from the nozzle 230. Similarly, the nozzle 230 at the side outlet acid pipe 310 can be disposed between adjacent side inlet acid pipes, close to the side wall of the tank 100. Of course, in other embodiments of the present invention, the nozzle 230 at the acid spray pipe 210 can also be disposed above the acid spray pipe 210, and the nozzle 230 at the side outlet acid pipe 310 can also be disposed on the side of the side outlet acid pipe 310 facing the axis of the tank 100.

[0037] In some embodiments of the present invention, a support member 110 is provided between the acid spraying pipe 210 and the bottom of the tank 100. The support member 110 is strip-shaped and extends axially along the acid spraying pipe 210, and is fixedly connected to the tank 100. It should be noted that while the nozzle 230 is located in the first region to facilitate stirring the quartz sand at the bottom of the tank 100, because the nozzle 230 is relatively close to the bottom wall of the tank 100, the nozzle 230 will block the quartz sand from flowing along the bottom wall of the tank 100 during sand discharge. This not only reduces the sand discharge efficiency, but also causes the quartz sand to have a large impact force on the nozzle 230, making the nozzle 230 prone to loosening and damage. By providing the support member 110, a gap is left between the nozzle 230 and the bottom wall of the tank 100, so that the nozzle 230 will not block the quartz sand from flowing along the bottom wall of the tank 100 during sand discharge, thereby improving the sand discharge efficiency and avoiding the problem of the nozzle 230 being prone to loosening and damage.

[0038] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A bottom-feed acid pickling tank, characterized in that: The device includes a tank body, with a liquid outlet at the top and a conical bottom. The bottom of the tank body has a sand discharge port and a liquid discharge port, and the liquid discharge port is equipped with a filter. An acid supply assembly is provided on the inner bottom of the tank body. The acid supply assembly is arranged around the sand discharge port and the liquid discharge port. The acid supply assembly includes multiple acid spray pipes, and each acid spray pipe has multiple acid spray ports. The acid spraying port is equipped with a nozzle, which unidirectionally flows away from the acid spraying pipe; The nozzle is detachably connected to the acid spray pipe; The area between adjacent acid spray pipes is called the first area, and the nozzle is located within the first area; The nozzle is made of elastic material and has an acid spraying channel inside. The acid spraying channel has an acid inlet end and an acid outlet end. The direction of acid spraying is the position of the acid outlet end relative to the acid inlet end. The acid outlet end has multiple valves. The multiple valves abut against each other, so that the inner radial direction of acid spraying at the acid outlet end gradually decreases until it is closed. Two baffles are provided on the outside of the nozzle. The two baffles are spaced apart along the acid spraying direction, and an installation gap is formed between the two baffles. The edge of the acid spraying port is located within the installation gap. A support is provided between the acid spraying pipe and the bottom of the tank; the support is strip-shaped and extends along the axial direction of the acid spraying pipe, and the support is fixedly connected to the tank.

2. The bottom-feed acid pickling tank according to claim 1, characterized in that: The drain outlet and the filter are collectively referred to as a drain structure. There are multiple drain structures, which are arranged around the sand discharge outlet.

3. The bottom-feed acid pickling tank according to claim 1, characterized in that: The filter includes a filter cartridge, which is positioned above the drain port.

4. The bottom-feed acid pickling tank according to claim 3, characterized in that: The filter also includes a filter cloth, which covers the outside of the filter cartridge and is detachably connected to the filter cartridge.

5. The bottom-feed acid pickling tank according to claim 1, characterized in that: The acid spraying pipe extends along the generatrix of the bottom of the tank. The acid supply assembly includes an acid supply pipe, which is annular. One end of the acid spraying pipe is connected to the acid supply pipe.

6. The bottom-feed acid pickling tank according to claim 1, characterized in that: The tank is equipped with multiple vertically arranged side-outlet acid pipes, which are located on the side wall of the tank. Each side-outlet acid pipe has multiple side-outlet acid ports.

7. The bottom-feed acid pickling tank according to claim 6, characterized in that: The tank is equipped with a top-in acid pipe, which is annular, and the top end of the side-out acid pipe is connected to the top-in acid pipe.

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