Buffer tank

Abstract

The present invention discloses a buffer tank for industrial production, comprising: a capacity tank body, a first opening, a second opening, and a third opening are provided on the capacity tank body, the first opening and the second opening are respectively provided on the peripheral side wall of the capacity tank body, and the third opening is provided at the bottom of the capacity tank body along the vertical direction of the capacity tank body. It also comprises an adjusting member provided on the capacity tank body and adjustable with the flow of the internal channel of the third opening, one end of the adjusting member is movably fixed on the capacity tank body, and the outer peripheral surface of the other end provided oppositely matches the internal shape and size of the third opening.

Description

Technical Field

[0001] The invention relates to the field of aluminum oxide production and preparation systems, and in particular to a buffer tank used for switching and diverting in an industrial production process. Background Art

[0002] As we all know, sodium aluminate solution has the characteristics of high temperature (130 degrees), strong alkali (280g / L), high solid content (150g / L), easy precipitation, and high viscosity. In the production process of alumina, sodium aluminate solution is transported through pipelines. The existing sodium aluminate solution transportation pipeline has a large inner diameter, large and unstable flow, and it is easy to erupt in the pipeline. The high temperature, high pressure and extremely unstable flow of the solution poses a huge challenge to the continuous operation conditions. For example, when analyzing the components of sodium aluminate in the pipeline, such as Figure 1 As shown, the sampling scheme of the analyzer is to weld a sampling branch pipe on the main pipeline to allow the sodium aluminate solution to enter the analyzer. A regulating valve needs to be set to control the flow entering the analyzer.

[0003] However, in the connecting pipeline of sodium aluminate, the pressure of the sodium aluminate solution flowing through the regulating valve is still too high and the flow rate is unstable. At the same time, the valve body of the existing ordinary regulating valve is very easy to be blocked and stuck due to the precipitation of the sodium aluminate solution due to the small structural gap, which leads to pipeline blockage and failure; since the regulating valve contains gaskets, sealing rings and other parts that are easy to age and corrode, it is easy to cause leakage; since the regulating valve is a closed part of the overall structure and has a complex internal structure, once the above problems such as blockage, stuck, and leakage occur, it cannot be repaired separately, and the entire device can only be closed and the regulating valve can be replaced as a whole. The replacement cost is high and affects the normal operation of the entire production line of the sodium aluminate solution; when the regulating valve is stuck, its internal connecting thread cannot be rotated due to blockage or corrosion, so when replacing the regulating valve, it is necessary to saw off the pipeline connected to it and weld a new joint, which is cumbersome and labor-intensive.

[0004] In the production process of alumina, the transfer of sodium aluminate solution directly affects the production efficiency. It is extremely necessary to develop a transfer device that is highly adaptable and technically reliable for sodium aluminate solution. However, the existing regulating valve is very easy to be blocked and stuck due to the precipitation of sodium aluminate solution, and it is also prone to leakage. The replacement operation is cumbersome, and it is necessary to saw off the pipes connected to it and weld new joints. The engineering workload is large, which directly affects the production operation of alumina.

[0005] This also constitutes the need to further improve the design of the switching equipment to solve the existing technical problems. Summary of the invention

[0006] In view of the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide a buffer tank for industrial production pipelines, so as to solve the technical problems that the existing ordinary regulating valves are easy to be blocked, stuck, leaked, and inconvenient to maintain, which affects the real-time detection of analytical instruments; as well as the unstable flow and solid particles that easily cause blockage of the internal pipelines of analytical instruments.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A buffer tank comprises: a capacity tank body, wherein a first opening, a second opening and a third opening are provided on the capacity tank body, wherein the first opening and the second opening are respectively provided on the peripheral side wall of the capacity tank body, and the third opening is provided at the bottom of the capacity tank body; and further comprises an adjusting member provided on the capacity tank body and capable of adjusting the flow rate of an internal channel of the third opening, wherein one end of the adjusting member is movably fixed on the capacity tank body, and the outer peripheral surface of the other end provided oppositely is adapted to the internal shape and size of the third opening.

[0009] Furthermore, the first opening and the second opening are arranged relatively spaced apart with respect to the plumb plane of the capacity tank body; or the first opening and the second opening are located on the same side wall surface of the capacity tank body; or the first opening and the second opening are separately arranged on two adjacent side wall surfaces of the capacity tank body.

[0010] Furthermore, the first opening is the liquid inlet, the second opening is the liquid outlet, and the third opening is the liquid discharge port; the flow area of ​​the third opening is controlled by the adjusting component, and then the liquid level of the solution inside the capacity tank body is adjusted to ensure the flow balance of the second opening; or the third opening is the liquid inlet, the first opening is the liquid discharge port, and the second opening is the liquid outlet.

[0011] Furthermore, the upper open end of the tank body of the capacity tank body is the fifth opening, and a cover plate for opening or closing the tank body is provided at the fifth opening; the flow regulating component is connected to the cover plate, and the bottom end of the flow regulating component is used to insert into or cover the third opening to adjust the flow size of the third opening, and the upper open end of the tank body is also used as an inspection port.

[0012] Furthermore, the bottom plate of the tank body is a conical plate; the third opening is located at the center of the conical plate.

[0013] Furthermore, the fourth opening is located directly above the second opening and is connected to the reflux pipe. The fourth opening is used for the solution to be analyzed in the tank body to overflow outward and then flow back to the reflux pipe.

[0014] Furthermore, the flow regulating component includes a plug for inserting or blocking the third opening, the plug is connected to a driving rod for driving it to move up and down, and the upper end of the driving rod is threadedly connected to the upper cover to drive the plug to move up and down when the driving rod is rotated, thereby adjusting the gap between the plug and the third opening and thereby adjusting the flow size of the third opening.

[0015] Furthermore, the flow regulating component also includes a guide cylinder for guiding the driving rod, the guide cylinder is vertically connected to the upper surface or the lower surface of the cover plate, and an internal thread threadedly connected to the driving rod is provided in the guide cylinder.

[0016] Furthermore, the capacity tank body is a high temperature and corrosion resistant structure, and the flow regulating component is a high temperature and corrosion resistant component; or a high temperature and corrosion resistant layer is attached to the inner surface of the capacity tank body, and the surface of the flow regulating component is supplemented with a high temperature and corrosion resistant layer.

[0017] Further, the first opening and the second opening are arranged opposite to each other, and the inlet cross-sectional area of ​​the first opening is larger than the outlet cross-sectional area of ​​the second opening.

[0018] The present invention has the following beneficial effects:

[0019] In the buffer tank of the present invention, since the capacity tank body has the function of retaining the solution and regulating the flow rate of the sample outflowing from the second opening, the incoming solution can be preliminarily precipitated and filtered, buffered, and the flow rate can be stabilized, thereby reducing the content of solid particles in the solution entering the analytical instrument and reducing the risk of clogging of the internal pipelines of the analytical instrument. At the same time, the buffering effect on the solution makes the flow rate of the solution entering the analytical instrument stable and balanced, which is beneficial to the sampling and analysis of the analytical instrument. Secondly, the buffer adjustment tank for industrial analysis sampling of the present invention has the characteristics of simple structure, easy maintenance, corrosion resistance, and anti-clogging.

[0020] In the existing industrial production process, ordinary regulating valves are used, which have the problems of unstable flow and easy leakage caused by solid particles. In addition, the replacement operation is cumbersome and requires sawing off the pipes connected to them and welding new joints. The engineering workload is large and directly affects the production operation of alumina. The present invention breaks through the technical bottleneck of blockage and jamming caused by aging and corrosion parts such as gaskets and sealing rings to achieve flow and / or pressure solution regulation. It integrates flow and / or pressure regulation in one, and effectively solves the problem of leakage or blockage caused by corrosion. The large opening end design can realize the maintenance of the tank body and the cleaning of precipitates, which greatly reduces the risk of pipe blockage, reduces pipe maintenance work, greatly improves maintenance efficiency, and improves production efficiency.

[0021] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 It is a structural schematic diagram of an existing sampling device;

[0024] Figure 2 It is a schematic diagram of the main structure of a buffer tank according to a preferred embodiment of the present invention.

[0025] Legend

[0026] 11. Capacity tank body; 111. First opening; 112. Second opening; 113. Third opening; 114. Fourth opening; 115. Tank body; 116. Cover plate; 12. Flow regulating component; 121. Plug; 122. Drive rod. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific processes and examples of materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0029] Reference Figure 2 The preferred embodiment of the present invention provides a buffer tank for industrial production, including: a capacity tank body 11, a first opening 111, a second opening 112, and a third opening 113 are provided on the capacity tank body 11, the first opening 111 and the second opening 112 are respectively provided on the peripheral side wall of the capacity tank body 11, and the third opening 113 is provided at the bottom of the capacity tank body 11 along the vertical direction of the capacity tank body 11. It also includes a flow regulating member 12 provided on the capacity tank body 11 and having an adjustable flow in the internal channel of the third opening 113, one end of the flow regulating member 12 is movably fixed on the capacity tank body 11, and the outer peripheral surface of the other end provided oppositely matches the internal shape and size of the third opening 113.

[0030] According to the buffer tank for industrial production provided by the embodiment of the present invention, the end side surface of the flow regulating component 12 is adapted to the internal shape and size of the third opening 113, and when the flow regulating component 12 is driven to move relative to the capacity tank body 11, the flow area of ​​the third opening 113 is controlled, thereby realizing the adjustment of the internal capacity of the capacity tank body 11; since the solution is first temporarily stored in the capacity tank body 11 and then flows out through the third opening 113 and / or the second opening 112, the pressure carried by the solution before entering the capacity tank body 11 is well relieved, and the spraying phenomenon caused by unstable flow is avoided, and a solution with a constant flow can be provided, which is conducive to continuous working conditions; since the solution is temporarily stored in the capacity tank body 11, the solid particles contained in the solution automatically settle under the action of gravity during the temporary storage process, which is particularly suitable for high-solid solutions (such as high temperature, strong alkali, and high-solid sodium aluminate solutions); since the entire buffer tank does not need to use gaskets, sealing rings and other easily aged and corroded parts, it is a good solution to the problems of leakage or blockage caused by corrosion and unstable flow.

[0031] In some embodiments of the present invention, the first opening 111 and the second opening 112 are arranged at intervals along the plumb direction, thereby forming a certain drop inside the capacity tank body 11, so as to better achieve accurate control of the flow rate. Alternatively, the first opening 111 and the second opening 112 are located on the same side wall surface of the capacity tank body 11. Alternatively, the first opening 111 and the second opening 112 are located on two adjacent side wall surfaces of the capacity tank body 11.

[0032] In a preferred embodiment of the present invention, the first opening 111 is a liquid inlet, the second opening 112 is a liquid outlet, and the third opening 113 is a liquid discharge port. Thus, after a high-temperature, high-pressure, and extremely unstable solution enters from the first opening 111, it is first temporarily stored inside the capacity tank body 11, and then flows out through the second opening 112, and the excess solution is emptied through the third opening 113; the flow area of ​​the third opening 113 is controlled by the flow regulating member 12, and the liquid level of the solution inside the capacity tank body 11 can be well adjusted, thereby ensuring that the flow of the second opening 112 is constant. Specifically, the first opening 111 is connected to the main delivery pipe for conveying the solution to be analyzed, so that the solution to be analyzed enters the capacity tank body 11, and the capacity tank body 11 is used to hold the incoming solution to be analyzed so that the solution to be analyzed can settle naturally, and the incoming solution to be analyzed can reach a steady flow rate after being buffered. The second opening 112 is connected to the analytical instrument so that the solution to be analyzed after preliminary filtration and steady flow rate enters the analytical instrument for analysis. A third opening 113 is provided at the bottom of the capacity tank body 11, and the third opening 113 is connected to a reflux pipe for recovering the solution to be analyzed. A flow regulating component 12 connected to the capacity tank body 11 is provided in the third opening 113. The flow regulating component 12 is used to adjust the flow rate of the solution to be analyzed discharged from the third opening 113, thereby indirectly adjusting the flow rate of the solution to be analyzed flowing out of the second opening 112.

[0033] In another preferred embodiment of the present invention, the third opening 113 is a liquid inlet, the first opening 111 is a liquid discharge port, and the second opening 112 is a liquid outlet, so that after a high-temperature, high-pressure solution with extremely unstable flow enters from the third opening 113, the flow rate entering the inner part of the capacity tank body 11 is controlled by regulating the flow area between the flow regulating member 12 and the third opening 113, thereby ensuring that the flow rate of the second opening 112 is constant. Specifically, the third opening 113 is connected to the main delivery pipe for conveying the solution to be analyzed, so that the solution to be analyzed enters the capacity tank body 11, and the third opening 113 is provided with a flow regulating member 12 connected to the capacity tank body 11, and the flow regulating member 12 is used to adjust the flow rate of the solution to be analyzed flowing into the third opening 113, thereby indirectly adjusting the flow rate of the solution to be analyzed flowing out of the second opening 112, and the capacity tank body 11 is used to hold the incoming solution to be analyzed so that the solution to be analyzed can settle naturally, and to make the incoming solution to be analyzed reach a steady flow rate after buffering. The first opening 111 is connected to a reflux pipe for recovering the solution to be analyzed.

[0034] When the buffer tank of the present invention is working, the solution to be analyzed in the main delivery pipe, taking sodium aluminate solution as an example, first enters the capacity tank body 11 through the first opening 111. Under the retention effect of the capacity tank body 11 on the solution, during the flow of the solution in the capacity tank body 11, solid particles such as slag and precipitates in the solution settle downward due to gravity, thereby reducing the content of solid particles entering the second opening 112; at the same time, the flow area of ​​the third opening 113 is regulated by the flow regulating component 12, so that the flow rate flowing out of the second opening 112 is constant. After the solution is buffered, settled, and stabilized, it flows out through the second opening 112 and then enters the analytical instrument for analysis and processing. Alternatively, the solution to be analyzed in the main delivery pipe, taking sodium aluminate solution as an example, first enters the capacity tank body 11 through the third opening 113. Under the retention effect of the capacity tank body 11 on the solution, during the flow of the solution in the capacity tank body 11, solid particles such as slag and precipitate in the solution settle downward due to gravity, thereby reducing the content of solid particles entering the second opening 112; at the same time, the flow area of ​​the third opening 113 is regulated by the flow regulating component 12, so that the flow rate flowing out of the second opening 112 is constant. After buffering, settling, and steady flow, the solution flows out through the second opening 112 and then enters the analytical instrument for analysis and processing.

[0035] In the buffer tank of the present invention, since the capacity tank body 11 has a solution retention function, the incoming solution can be preliminarily sedimented and filtered and the flow rate can be buffered and stabilized, thereby reducing the content of solid particles in the solution entering the analytical instrument and reducing the risk of clogging of the internal pipelines of the analytical instrument. At the same time, it also has a buffering effect on the solution, making the flow rate of the solution entering the analytical instrument smooth and balanced, which is beneficial to the sampling and analysis of the analytical instrument.

[0036] Alternatively, if Figure 2As shown, the capacity tank body 11 includes a hollow cylindrical tank body 115, the upper open end of the tank body 115 is a fifth opening, and a cover plate 116 for opening or closing the tank body 115 is provided at the fifth opening. The flow regulating member 12 is connected to the cover plate 116, and the bottom end of the flow regulating member 12 is used to be inserted into the third opening 113 to adjust the flow size of the third opening 113, and the upper open end of the tank body 115 is also used as an inspection port. In the present invention, since the capacity tank body 11 includes a detachable tank body 115 and a cover plate 116, and the flow regulating component 12 is connected to the cover plate 116 and the lower end is inserted into / blocked in the third opening 113, the cover plate 116 can be opened to clean the solid particles in the tank body 115 or attached to the flow regulating component 12, thereby greatly reducing the risk of pipeline blockage and reducing pipeline maintenance work; on the other hand, when a problem occurs with the flow regulating component 12, since the capacity tank body 11 is a detachable structure, the flow regulating component 12 can be repaired alone without closing the entire pipeline and replacing the diversion transfer tank as a whole, thereby reducing costs without affecting work efficiency.

[0037] In some embodiments of the present invention, Figure 2 As shown, the bottom plate of the tank body 115 is a tapered plate; the third opening 113 is located at the center of the tapered plate, which is convenient for the solution to be analyzed in the tank body 115 to be discharged from the third opening 113, and also convenient for the solid particles to be discharged smoothly from the third opening 113, reducing the retention of solid particles between the plug 121 and the third opening 113. The lower end surface of the plug 121 is a tapered surface matching the tapered plate. The plug 121 and the third opening 113 are matched through the tapered surface, which is convenient for adjusting the gap between the two and controlling the flow rate of the third opening 113. In actual use, the plug 121 does not need to completely block the third opening 113, and can be in a normally open state. It only needs to ensure that the flow rate of the third opening 113 is less than the flow rate of the first opening 111, so that the solution in the tank body 115 can meet the requirements of flowing out from the second opening 112. Therefore, the plug 121 and the third opening 113 will not be blocked by solid particles in the solution to be analyzed due to the small gap.

[0038] In other embodiments of the present invention, not shown in the figure, the bottom plate of the tank body 115 is a plane, the second opening 112 is located in the middle of the bottom plate, and a drain pipe for discharging the solution to be analyzed is connected to the second opening 112, and the water inlet end of the drain pipe is a tapered conical pipe, and the bottom plate of the tank body 115 is a plane, which is convenient for the precipitation and deposition of solid particles in the solution to be analyzed, thereby reducing the content of solid particles in the pipeline, reducing the risk of pipeline blockage, and also facilitating the solid particles to be cleaned out of the tank body 115. The lower end surface of the plug 121 is a conical surface that matches the inner conical surface of the conical pipe. The plug 121 and the drain pipe of the third opening 113 are matched through the conical surface, which is convenient for adjusting the gap between the plug 121 and the water inlet end of the drain pipe to control the flow rate of the third opening 113. During actual use, the plug 121 does not need to completely block the third opening 113, and can be in a normally open state. It only needs to ensure that the flow rate of the third opening 113 is less than the flow rate of the first opening 111, so that the solution in the tank body 115 can flow out from the second opening 112. Therefore, the plug 121 and the third opening 113 will not be blocked by solid particles in the solution to be analyzed due to the small gap.

[0039] In some embodiments of the present invention, a fourth opening 114 is further provided on the side wall of the tank body 115. The fourth opening 114 is located above the second opening 112 and is connected to the reflux pipe. The fourth opening 114 is used to allow the solution to be analyzed in the tank body 115 to overflow and then flow back to the reflux pipe. In actual use, when the flow rate of the second opening 112 reaches the upper limit, the excess solution flows into the reflux pipe through the fourth opening 114 above the second opening 112, so as to achieve a constant flow rate at the sampling port.

[0040] Alternatively, if Figure 2 As shown, the flow regulating component 12 includes a plug 121 for inserting / blocking the third opening 113, and the plug 121 is connected to a driving rod 122 for driving it to move up and down, and the upper end of the driving rod 122 is threadedly connected to the cover plate 116, so that when the driving rod 122 is rotated, the plug 121 is driven to move up and down, thereby adjusting the gap between the plug 121 and the third opening 113, and thereby adjusting the flow size of the third opening 113. When the flow regulating component 12 of the present invention is used to regulate the flow of the second opening 112, it is only necessary to rotate the driving rod 122 so that the driving rod 122 drives the plug 121 to rise and fall, and then adjust the gap between the plug 121 and the third opening 113 to adjust the flow of the third opening 113, thereby achieving the purpose of indirectly regulating the flow of the second opening 112. The flow regulating component 12 has a simple structure, simple adjustment operation, and is easy to implement. Since the adjustment thread is located on the cover plate 116, it does not contact the solution in the tank body 115, thereby completely avoiding the adjustment thread from being stuck due to corrosion or solid particles. At the same time, when repairing or replacing the flow regulating component 12, there is no need to saw off the pipeline connected to the capacity tank body 11.

[0041] Alternatively, if Figure 2 As shown, the flow regulating component 12 also includes a guide cylinder for guiding the driving rod 122 . The guide cylinder is vertically connected to the upper surface or the lower surface of the cover plate 116 , and an internal thread threadedly connected to the driving rod 122 is provided in the guide cylinder.

[0042] Optionally, the capacity tank body 11 is a high temperature resistant and corrosion resistant structure, and the flow regulating component 12 is a high temperature resistant and corrosion resistant component; or a high temperature resistant and corrosion resistant layer is attached to the inner surface of the capacity tank body 11, and a high temperature resistant and corrosion resistant layer is auxiliaryly provided on the surface of the flow regulating component 12. Specifically, the capacity tank body 11 and the flow regulating component 12 are both made of stainless steel material, which can withstand the high temperature and corrosiveness of the solution to be analyzed, and the buffer tank of the present invention does not contain easily corroded and aged parts such as rubber, thereby solving the leakage or blockage problem caused by corrosion.

[0043] Preferably, the first opening 111 and the second opening 112 are arranged opposite to each other to minimize the influence of the first opening 111 on the solution flowing out of the second opening 112, so that the flow rate of the solution flowing out of the second opening 112 is smooth and balanced, and the inlet cross-sectional area of ​​the first opening 111 is larger than the outlet cross-sectional area of ​​the second opening 112, so that the second opening 112 is filled with the solution to be analyzed during the entire working process, so as to further make the flow rate of the solution to be analyzed smooth and balanced.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A buffer tank, characterized in that: include: A capacity tank body (11), wherein the capacity tank body (11) is provided with a first opening (111), a second opening (112), and a third opening (113), wherein the first opening (111) and the second opening (112) are respectively arranged on the peripheral side wall of the capacity tank body (11), the third opening (113) is arranged at the bottom of the capacity tank body (11), and the second opening (112) is connected to an analysis instrument so that a solution to be analyzed after preliminary filtration and a stable flow rate can enter the analysis instrument for analysis; It also includes a flow regulating member (12) disposed on the capacity tank body (11) and arranged to be adjustable in flow rate in the internal channel of the third opening (113); one end of the flow regulating member (12) is movably fixed to the capacity tank body (11), and the outer peripheral surface of the other end disposed opposite to the capacity tank body (11) is adapted to the internal shape and size of the third opening (113); The first opening (111) is a liquid inlet, the second opening (112) is a liquid outlet, and the third opening (113) is a liquid discharge outlet; the flow area of ​​the third opening (113) is controlled by the flow regulating component (12), so that the liquid level of the solution inside the capacity tank body (11) can be well adjusted, thereby ensuring that the flow rate of the second opening (112) is constant; or The third opening (113) is a liquid inlet, the first opening (111) is a liquid outlet, and the second opening (112) is a liquid outlet. Thus, after a high-temperature, high-pressure solution with an extremely unstable flow rate enters from the third opening (113), the flow rate entering the interior of the capacity tank body (11) is controlled by regulating the flow area between the flow regulating component (12) and the third opening (113), thereby ensuring that the flow rate of the second opening (112) is constant.

2. The buffer tank according to claim 1, characterized in that: The first opening (111) and the second opening (112) are arranged relatively spaced apart with respect to the plumb plane of the capacity tank body (11); or The first opening (111) and the second opening (112) are located on the same side wall surface of the capacity tank body (11); or The first opening (111) and the second opening (112) are respectively arranged on two adjacent side wall surfaces of the capacity tank body (11).

3. The buffer tank according to any one of claims 1 or 2, characterized in that: The upper opening end of the tank body (115) of the capacity tank body (11) is a fifth opening, and a cover plate (116) for opening or closing the tank body (115) is provided at the fifth opening; The flow regulating component (12) is connected to the cover plate (116), and the bottom end of the flow regulating component (12) is used to insert into or cover the third opening (113) to adjust the flow rate of the third opening (113), and the upper opening end of the tank body (115) is also used as an inspection port.

4. The buffer tank according to claim 3, characterized in that: The bottom plate of the tank body (115) is a conical plate; The third opening (113) is located at the center of the conical plate.

5. The buffer tank according to claim 3, characterized in that: The fourth opening (114) is located directly above the second opening (112) and is connected to the reflux pipe. The fourth opening (114) is used to allow the solution to be analyzed in the tank body (115) to overflow and then flow back to the reflux pipe.

6. The buffer tank according to claim 3, characterized in that: The flow regulating component (12) comprises a plug (121) for inserting into or blocking the third opening (113); the plug (121) is connected to a driving rod (122) for driving the plug to move up and down; the upper end of the driving rod (122) is threadedly connected to the cover plate (116) so that when the driving rod (122) is rotated, the plug (121) is driven to move up and down, thereby adjusting the gap between the plug (121) and the third opening (113), thereby adjusting the flow rate of the third opening (113).

7. The buffer tank according to claim 6, characterized in that: The flow regulating component (12) further comprises a guide cylinder for guiding the driving rod (122), the guide cylinder being vertically connected to the upper surface or the lower surface of the cover plate, and the guide cylinder being provided with an internal thread threadedly connected to the driving rod (122).

8. The buffer tank according to any one of claims 4 to 7, characterized in that: The capacity tank body (11) is a high temperature resistant and corrosion resistant structure, and the flow regulating component (12) is a high temperature resistant and corrosion resistant component; or The inner surface of the capacity tank body (11) is attached with a high temperature resistant and corrosion resistant layer, and the surface of the flow regulating component (12) is supplemented with a high temperature resistant and corrosion resistant layer.

9. The buffer tank according to claim 8, characterized in that: The first opening (111) and the second opening (112) are arranged opposite to each other, and an inlet cross-sectional area of ​​the first opening (111) is greater than an outlet cross-sectional area of ​​the second opening (112).

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