High purity liquid storage device and working method

Abstract

The present application discloses a high-purity liquid storage device and a working method thereof, wherein the high-purity liquid storage device includes two groups of temporary storage mechanisms and two groups of storage mechanisms. When one of the storage mechanisms outputs high-purity liquid to a tank truck, the distillation tower can continuously input high-purity liquid to one of the temporary storage mechanisms, and at the same time, the high-purity liquid stored in another of the temporary storage mechanisms can be continuously transferred to another of the storage mechanisms. The high-purity liquid storage device can simultaneously input, output and transfer high-purity liquid without interfering with each other, thereby improving the efficiency of input, output and transfer of high-purity liquid. Since the distillation tower inputs high-purity liquid to one of the temporary storage mechanisms while the high-purity liquid stored in another of the temporary storage mechanisms is transferred to another of the storage mechanisms, the storage space in the other of the temporary storage mechanisms is vacated, and the temporary storage mechanism is used as a backup, thereby expanding the storage capacity of the high-purity liquid storage device for high-purity liquid.

Description

Technical Field

[0001] The present invention relates to the technical field of storage tank storage equipment, and in particular to a high-purity liquid storage device and a working method thereof. Background Art

[0002] The raw gas can be separated by a distillation tower to obtain high-purity products, such as high-purity liquid discharged from the bottom of the tower. The high-purity liquid can be transported to the required location by a tank truck. Since the distillation tower operates in real time, the high-purity liquid is produced in real time, but the arrival time of the tank truck is uncertain, so the high-purity liquid separated by the distillation tower needs to be injected into the storage device for collection and storage.

[0003] A single storage tank cannot meet the demand for high-purity liquid to enter and exit at the same time, so most existing high-purity liquid storage devices adopt a dual-tank mode. The two storage tanks are connected to the distillation tower and the tank truck respectively through pipelines, and pumps and valves are provided on the pipelines. While one storage tank outputs high-purity liquid to the tank truck under the pressure of the pump, the high-purity liquid discharged from the distillation tower is input to the other storage tank under the pressure of the pump. When the other storage tank is almost full, one storage tank needs to interrupt the connection with the tank truck so that the high-purity liquid discharged from the distillation tower can be injected into this storage tank, which will reduce the efficiency of the storage device to output to the tank truck. In addition, the high-purity liquid is contaminated by the pump during the process of being transported from the distillation tower to the storage tank under the pressure of the pump and being output from the storage tank to the tank truck, resulting in a decrease in the purity of the high-purity liquid transported by the tank truck and failing to meet the conditions of use. Summary of the invention

[0004] In order to solve the above technical problems and achieve at least one advantage of the present invention, the present invention provides a high-purity liquid storage device for storing the high-purity liquid separated by a distillation tower, the high-purity liquid storage device comprising:

[0005] Two groups of temporary storage mechanisms, each group of the temporary storage mechanisms includes a temporary storage tank, a first pipe group and a first boosting device, the first pipe group includes a first liquid inlet pipe, a first liquid outlet pipe, a first input pipe, a first output pipe and a first exhaust pipe, the first liquid inlet pipe is connected to the temporary storage tank and the bottom of the distillation tower, the high-purity liquid discharged from the bottom of the distillation tower can be input into the temporary storage tank through the first liquid inlet pipe, the first liquid outlet pipe is connected to the temporary storage tank, the high-purity liquid stored in the temporary storage tank can be discharged through the first liquid outlet pipe, the first input pipe and the first output pipe are respectively connected to the first boosting device, and the first output pipe and the first exhaust pipe are respectively connected to the temporary storage tank, the high-purity liquid can be passed into the first boosting device through the first input pipe, the first boosting device is configured to vaporize at least part of the high-purity liquid flowing through the first boosting device by using a fluid with a temperature higher than that of the high-purity liquid, and the vaporized gas enters the temporary storage tank through the first output pipe;

[0006] Two groups of storage mechanisms, each group of the storage mechanisms includes a storage tank and a second pipe group, the second pipe group includes a second liquid inlet pipe and a second liquid outlet pipe, the second liquid inlet pipe and the second liquid outlet pipe are respectively connected to the storage tank, wherein each of the second liquid inlet pipes is respectively connected to the first liquid outlet pipe connected to each of the two temporary storage tanks, the high-purity liquid discharged from any of the temporary storage tanks can flow into any of the storage tanks through a pipeline, and the high-purity liquid stored in the storage tank can be output to a tank truck through the second liquid outlet pipe, when the high-purity liquid discharged from the bottom of the distillation tower is injected into the temporary storage tank connected to the first liquid inlet pipe through any of the first liquid inlet pipes, the other temporary storage tank can transfer the high-purity liquid stored in itself to one of the storage tanks through a pipeline, and the other storage tank can output the high-purity liquid to the tank truck through the second liquid outlet pipe connected to itself.

[0007] According to one embodiment of the present invention, the first exhaust pipe is connected to the middle part of the distillation tower, and the gas exhausted from the temporary storage tank can be returned to the distillation tower as raw gas.

[0008] According to one embodiment of the present invention, the high-purity liquid storage device is further provided with a control unit, and each group of the temporary storage mechanism further includes a first pressure monitoring component and a first valve group, the first valve group includes a first air pressure control valve and a first exhaust control valve, the first air pressure control valve is installed on the first input pipe or the first output pipe, and is used to control whether the high-purity liquid enters the first pressurizing device and controls the flow rate in the first input pipe or controls whether the gas enters the temporary storage tank and controls the flow rate in the first output pipe, and the first exhaust control valve is installed on the first exhaust pipe, and is used to control whether the gas in the temporary storage tank is discharged from the first exhaust pipe. and the flow rate of the first exhaust pipe, the first exhaust control valve and the first air pressure control valve are both controllably connected to the control unit, the control unit can adjust the opening and closing of the first exhaust control valve and the degree of opening and closing, the first pressure monitoring component is used to monitor the pressure of the temporary storage tank, and the first pressure monitoring component is communicatively connected to the control unit, the control unit can control the opening and closing of the first exhaust control valve and the first air pressure control valve according to the monitoring result of the first pressure monitoring component, and the control unit can adjust the degree of opening and closing of the first exhaust control valve according to the production capacity of the distillation tower and the flow rate of the raw gas entering the distillation tower.

[0009] According to one embodiment of the present invention, each of the storage mechanisms further includes a second boosting device, and the second tube group further includes a second input pipe, a second output pipe and a second exhaust pipe, the second input pipe and the second output pipe are respectively connected to the second boosting device, the second output pipe and the second exhaust pipe are respectively connected to the storage tank, and high-purity liquid can be introduced into the second boosting device through the second input pipe, and the second boosting device is configured to vaporize at least part of the high-purity liquid flowing through the second boosting device by using a fluid having a temperature higher than that of the high-purity liquid, and the vaporized gas enters the storage tank through the second output pipe, and the gas in the storage tank is discharged through the second exhaust pipe.

[0010] According to one embodiment of the present invention, the second exhaust pipe is connected to the middle part of the distillation tower, and the gas exhausted from the storage tank can be returned to the distillation tower as raw gas.

[0011] According to one embodiment of the present invention, each storage mechanism further includes a second valve group and a second pressure monitoring device, the second valve group further includes a second air pressure control valve and a second exhaust control valve, the second air pressure control valve is installed on the second input pipe or the second output pipe, and is used to control whether the high-purity liquid enters the second boosting device and controls the flow rate in the second input pipe or controls whether the gas-liquid mixture enters the storage tank and controls the flow rate in the second output pipe, the second exhaust control valve is installed on the second exhaust pipe, and is used to control whether the gas in the storage tank is discharged from the second exhaust pipe and the flow rate of the second exhaust pipe, the second exhaust control valve is controllably connected to the control unit, the second pressure monitoring device is used to monitor the pressure of the storage tank, and the second pressure monitoring device is communicatively connected to the control unit, the control unit can control the opening and closing of the second exhaust control valve and its degree, the control unit can control the opening and closing of the second exhaust control valve according to the monitoring result of the second pressure monitoring device, and the control unit can adjust the opening and closing degree of the second exhaust control valve according to the production capacity of the distillation tower and the flow rate of the raw gas introduced into the distillation tower.

[0012] In order to solve the above technical problems and achieve at least one advantage of the present invention, the present invention provides a working method of a high-purity liquid storage device, characterized in that it is applied to the high-purity liquid storage device described in the above embodiment, and includes the following operations:

[0013] The temporary storage mechanism performs an input operation: the high-purity liquid discharged from the distillation tower is automatically injected into the temporary storage tank through the first liquid inlet pipe connected to the temporary storage tank provided with the temporary storage mechanism performing the input operation;

[0014] At the same time, another temporary storage mechanism filled with high-purity liquid performs a transfer operation to one storage mechanism, and the transfer operation includes the following steps:

[0015] Part of the high-purity liquid stored in the temporary storage tank provided in the other temporary storage mechanism flows through the first boosting device provided in the temporary storage mechanism that performs the transfer operation, and the first boosting device converts the high-purity liquid into gas, and the gas flows to the temporary storage tank provided in the temporary storage mechanism that is filled with high-purity liquid and performs the transfer operation;

[0016] When the pressure of the temporary storage tank provided by the other temporary storage mechanism is higher than a preset value, the high-purity liquid stored in the temporary storage tank provided by the temporary storage mechanism performing the transfer operation is transferred to the storage tank provided by one storage mechanism under the action of high pressure;

[0017] When the liquid level of the temporary storage tank provided by the other temporary storage mechanism reaches the lowest liquid level, the temporary storage tank provided by the temporary storage mechanism performing the transfer operation stops transferring to the storage tank provided by the first storage mechanism, and the gas in the temporary storage tank provided by the temporary storage mechanism performing the transfer operation is discharged from the first exhaust pipe connected to the temporary storage tank, thereby reducing the pressure of the temporary storage tank;

[0018] At the same time, another storage mechanism performs an output operation: the storage tank provided by the storage mechanism performing the output operation can output high-purity liquid to a tank truck;

[0019] When the temporary storage tank provided for the temporary storage mechanism that performs the input operation is full, the two groups of the temporary storage mechanisms switch, and the temporary storage mechanism that originally performs the input operation switches to perform the transfer operation, and the temporary storage mechanism that originally performs the transfer operation performs the input operation; when the storage tank provided for the storage mechanism that performs the transfer operation is full, the two groups of the storage mechanisms switch, and the storage mechanism that originally performs the transfer operation switches to perform the output operation, and the storage mechanism that originally performs the output operation performs the transfer operation, and the cycle continues.

[0020] According to an embodiment of the present invention, the gas in the temporary storage tank provided by the temporary storage mechanism for performing the transfer operation is discharged into the middle part of the distillation tower through the first exhaust pipe connected to the temporary storage tank.

[0021] According to one embodiment of the present invention, when the pressure of the storage tank provided for the storage mechanism performing the output operation does not exceed the pressure of the tank truck, part of the high-purity liquid stored in the storage tank provided for the storage mechanism performing the output operation flows through the second boosting device provided for the storage mechanism performing the output operation, and the second boosting device converts the high-purity liquid into gas, and the gas flows to the storage tank provided for the storage mechanism performing the output operation which is filled with high-purity liquid, and the high-purity liquid is output to the tank truck after the pressure of the corresponding storage tank exceeds the pressure of the tank truck.

[0022] According to one embodiment of the present invention, before the high-purity liquid in the temporary storage tank provided in the temporary storage mechanism that performs the transfer operation is transferred to the storage tank provided in the storage mechanism under the action of high pressure, the gas in the storage tank is discharged to the middle part of the distillation tower through the second exhaust pipe connected thereto.

[0023] Compared with the prior art, the high-purity liquid storage device and the working method thereof provided by the present invention have the following technical effects:

[0024] 1. The high-purity liquid storage device of the present invention is provided with two groups of temporary storage mechanisms and two groups of storage mechanisms, thereby expanding the volume of high-purity liquid. When one storage mechanism outputs high-purity liquid to a tank truck, the distillation tower can continuously input high-purity liquid to one temporary storage mechanism, and at the same time, the high-purity liquid stored in another temporary storage mechanism can be continuously transferred to another storage mechanism, so that the input, output and transfer of high-purity liquid can be carried out simultaneously without interfering with each other, thereby improving the efficiency of the input, output and transfer of high-purity liquid.

[0025] 2. The present invention utilizes the static pressure of the liquid column to input the high-purity liquid separated by the distillation tower into any of the temporary storage tanks; at the same time, the present invention also provides a first boosting device and a second boosting device, which can vaporize part of the high-purity liquid into gas and then flow back to the temporary storage tank and the storage tank, so that the high-purity liquid can be transferred and output under the action of high pressure, and there is no need to additionally set a pump on the pipeline connecting the distillation tower and the temporary storage tank, the pipeline connecting the temporary storage tank and the storage tank, and the pipeline connecting the storage tank and the tank truck, thereby avoiding contamination of the high-purity liquid during the input, transfer and output process and ensuring the purity of the high-purity liquid.

[0026] 3. The gas in the temporary storage tank and the storage tank of the present invention can flow back to the distillation tower, so that the distillation tower can separate again, saving resources.

[0027] 4. In the present invention, valves are arranged on the pipelines connecting the temporary storage tank and the distillation tower and the storage tank and the distillation tower. The control unit can adjust the opening and closing degree of the valve according to the production capacity of the distillation tower and the flow rate of the raw gas entering the distillation tower to increase the output of ultrapure liquid separated by the distillation tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The structural block diagram of the high-purity liquid storage device of the present invention is shown.

[0029] Figure 2 The structural block diagram of the temporary storage mechanism of the present invention is shown.

[0030] Figure 3 The structural block diagram of the storage mechanism of the present invention is shown.

[0031] Reference numerals:

[0032] 10. Temporary storage mechanism; 11. Temporary storage tank; 12. First pipe group; 121. First liquid inlet pipe; 122. First liquid outlet pipe; 123. First input pipe; 124. First output pipe; 125. First exhaust pipe; 126. First liquid discharge pipe; 13. First valve group; 131. First liquid inlet control valve; 132. First liquid outlet control valve; 133. First air pressure control valve; 134. First exhaust control valve; 135. First liquid discharge control valve; 14. First boosting device; 15. First pressure monitoring component;

[0033] 20. Storage mechanism; 21. Storage tank; 22. Second pipe group; 221. Second liquid inlet pipe; 222. Second liquid outlet pipe; 223. Second input pipe; 224. Second output pipe; 225. Second exhaust pipe; 23. Second valve group; 231. Second liquid inlet control valve; 232. Second liquid outlet control valve; 233. Second air pressure control valve; 234. Second exhaust control valve; 24. Second boosting device; 25. Second pressure monitoring element;

[0034] 900. Distillation tower. DETAILED DESCRIPTION

[0035] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0036] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0037] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0038] refer to Figures 1 to 3 A high-purity liquid storage device according to a preferred embodiment of the present invention will be described in detail below. The high-purity liquid storage device is connected to the bottom of the distillation tower 900, and the high-purity liquid separated by the distillation tower 900 is discharged into the high-purity liquid storage device from the bottom.

[0039] As an example, the high purity liquid may be implemented as liquid nitrogen.

[0040] Specifically, the high-purity liquid storage device includes two groups of temporary storage mechanisms 10 and two groups of storage mechanisms 20 .

[0041] Each group of the temporary storage mechanism 10 includes a temporary storage tank 11 and a first pipe group 12. The first pipe group 12 includes a first liquid inlet pipe 121 and a first liquid outlet pipe 122. The first liquid inlet pipe 121 is connected to the temporary storage tank 11 and the bottom of the distillation tower 900; the first liquid outlet pipe 122 is connected to the temporary storage tank 11. The high-purity liquid discharged from the bottom of the distillation tower 900 can be input into the temporary storage tank 11 through the first liquid inlet pipe 121, and the high-purity liquid stored in the temporary storage tank 11 can be discharged through the first liquid outlet pipe 122.

[0042] Each group of the storage mechanism 20 includes a storage tank 21 and a second pipe group 22. The second pipe group 22 includes a second liquid inlet pipe 221 and a second liquid outlet pipe 222. The second liquid inlet pipe 221 and the second liquid outlet pipe 222 are respectively connected to the storage tank 21, wherein each of the second liquid inlet pipes 221 is respectively connected to the first liquid outlet pipe 122 connected to the two temporary storage tanks 11. In this way, the high-purity liquid discharged from any of the temporary storage tanks 11 can flow into any of the storage tanks 21 through the pipeline. The high-purity liquid stored in the storage tank 21 can be output to the tank truck through the second liquid outlet pipe 222.

[0043] That is, when the high-purity liquid discharged from the bottom of the distillation tower 900 is injected into the temporary storage tank 11 connected to the first liquid inlet pipe 121 through any of the first liquid inlet pipes 121, the other temporary storage tank 11 transfers the high-purity liquid stored in itself to the one of the storage tanks 21 through the pipeline, and the other of the storage tanks 21 can output the high-purity liquid to the tank truck through the second liquid outlet pipe 222 connected to itself. In other words, when one of the storage mechanisms 20 outputs the high-purity liquid to the tank truck, the distillation tower 900 can continuously input the high-purity liquid to the one of the temporary storage mechanisms 10, and at the same time, the high-purity liquid stored in the other of the temporary storage mechanisms 10 can be continuously transferred to the other of the storage mechanisms 20, so that the input, output and transfer of the high-purity liquid by the high-purity liquid storage device can be carried out simultaneously without interfering with each other, thereby improving the efficiency of the input, output and transfer of the high-purity liquid. Since the distillation tower 900 inputs high-purity liquid to one of the temporary storage mechanisms 10, while the high-purity liquid stored in another temporary storage mechanism 10 is transferred to another storage mechanism 20, the storage space in another temporary storage mechanism 10 is vacated, and the other temporary storage mechanism 10 is used as a backup, thereby expanding the storage capacity of the high-purity liquid storage device for high-purity liquid, and there is no need to use the storage tank 21 output from the tank truck to store and interrupt the output to the tank truck, and at the same time, it also avoids the distillation tower 900 from reducing production or stopping production due to insufficient high-purity liquid storage space. Similarly, the storage mechanism 20 to which the high-purity liquid is transferred by the temporary storage mechanism 10 is used as a backup to ensure that the device can maintain external output in real time.

[0044] It is worth mentioning that the high-purity liquid at the bottom of the distillation tower 900 is discharged into the temporary storage tank 11 under the action of the static pressure of the liquid column. In this way, there is no need to install a pump on the first liquid inlet pipe 121, thereby avoiding contamination of the high-purity liquid by the pump, thereby ensuring the purity of the high-purity liquid input into the temporary storage tank 11.

[0045] Preferably, the temporary storage tanks 11 provided in each of the two groups of temporary storage mechanisms 10 are both arranged horizontally, and the static pressure of the liquid column in the temporary storage tanks 11 is always lower than the static pressure of the liquid column in the distillation tower 900, so that the high-purity liquid can be automatically discharged from the bottom of the distillation tower 900 to the temporary storage tanks 11.

[0046] It is worth mentioning that the temporary storage mechanism 10 also includes a first valve group 13. The first valve group 13 includes a first liquid inlet control valve 131 and a first liquid outlet control valve 132. The first liquid inlet control valve 131 is installed on the first liquid inlet pipe 121, and is used to control whether the high-purity liquid discharged from the bottom of the distillation tower 900 enters the temporary storage tank 11 and controls the flow rate of the first liquid inlet pipe 121. The first liquid outlet control valve 132 is installed on the first liquid outlet pipe 122, and is used to control whether the high-purity liquid in the temporary storage tank 11 is discharged and controls the flow rate of the first liquid outlet pipe 122. The storage mechanism 20 also includes a second valve group 23, and the second valve group 23 includes a second liquid inlet control valve 231 and a second liquid outlet control valve 232. The second liquid inlet control valve 231 is installed on the second liquid inlet pipe 221, and is used to control whether the high-purity liquid discharged from the temporary storage tank 11 enters the storage tank 21 and the flow rate of the second liquid inlet pipe 221. The second liquid outlet control valve 232 is installed on the second liquid outlet pipe 222 to control whether the high-purity liquid stored in the storage tank 21 is discharged and the flow rate in the second liquid outlet pipe 222 .

[0047] Preferably, each of the temporary storage mechanisms 10 further includes a first boosting device 14, and the first tube group 12 further includes a first input pipe 123, a first output pipe 124 and a first exhaust pipe 125. The first input pipe 123 and the first output pipe 124 are respectively connected to the first boosting device 14, and the first output pipe 124 and the first exhaust pipe 125 are respectively connected to the temporary storage tank 11. High-purity liquid can be introduced into the first boosting device 14 through the first input pipe 123, and the first boosting device 14 is configured to vaporize at least part of the high-purity liquid flowing through the first boosting device 14 by using a fluid having a temperature higher than that of the high-purity liquid, and the vaporized gas enters the temporary storage tank 11 through the first output pipe 124.

[0048] It is understandable that after the vaporized gas enters the temporary storage tank 11 through the first output pipe 124, the pressure in the temporary storage tank 11 increases, so that the high-purity liquid stored in the temporary storage tank 11 can be autonomously and quickly transferred to the storage tank 21 under the action of high pressure, so that the storage tank 21 can be quickly emptied. In this way, there is no need to install a pump on the first liquid outlet pipe 122 and the second liquid inlet pipe 221, so as to avoid the high-purity liquid being contaminated by the pump, thereby ensuring the purity of the high-purity liquid transferred from the temporary storage tank 11 to the storage tank 21. Before the high-purity liquid discharged from the bottom of the distillation tower 900 is passed into the temporary storage tank 11, the gas in the temporary storage tank 11 is discharged through the first exhaust pipe 125 to reduce the pressure in the temporary storage tank 11, so that the high-purity liquid in the distillation tower 900 can be autonomously discharged to the temporary storage tank 11 under the action of the static pressure of the liquid column.

[0049] In one example, the first supercharging device 14 is implemented as a carburetor.

[0050] Preferably, the first exhaust pipe 125 is connected to the middle of the distillation tower 900, so that the gas exhausted from the temporary storage tank 11 can be returned to the distillation tower 900 as raw gas to be recycled, thereby increasing the recovery amount of high-purity liquid.

[0051] It is worth mentioning that the first valve group 13 further includes a first air pressure control valve 133 and a first exhaust control valve 134. The first air pressure control valve 133 is installed on the first input pipe 123 or the first output pipe 124, and is used to control whether the high-purity liquid enters the first boosting device 14 and controls the flow rate in the first input pipe 123 or controls whether the gas enters the temporary storage tank 11 and controls the flow rate in the first output pipe 124. The first exhaust control valve 134 is installed on the first exhaust pipe 125, and is used to control whether the gas in the temporary storage tank 11 is discharged from the first exhaust pipe 125 and the flow rate of the first exhaust pipe 125.

[0052] Preferably, the first input pipe 123 is connected to the temporary storage tank 11 , and part of the high-purity liquid stored in the temporary storage tank 11 flows to the first boosting device 14 through the first input pipe 123 .

[0053] Preferably, the high-purity liquid storage device is also provided with a control unit (not shown in the drawings). The first exhaust control valve 134 is controllably connected to the control unit, and the control unit can adjust the opening and closing of the first exhaust control valve 134 and the degree of opening and closing. Each group of the temporary storage mechanism 10 also includes a first pressure monitoring component 15. The first pressure monitoring component 15 is used to monitor the pressure of the temporary storage tank 11, and the first pressure monitoring component 15 is communicatively connected to the control unit. The control unit can control the opening and closing of the first exhaust control valve 134 according to the monitoring result of the first pressure monitoring component 15, and the control unit can adjust the degree of opening and closing of the first exhaust control valve 134 according to the production capacity of the distillation tower 900 and the flow rate of the raw gas introduced into the distillation tower 900.

[0054] That is to say, within the production capacity of the distillation tower 900, when the flow rate of the raw gas entering the distillation tower 900 is large, the control unit controls the first exhaust control valve 134 to open to a smaller extent, so that the gas in the temporary storage tank 11 is slowly output to the distillation tower 900, to prevent excessive gas from entering the distillation tower 900 per unit time and affecting the separation effect of the distillation tower 900, so that the distillation tower 900 can operate smoothly; when the flow rate of the raw gas entering the distillation tower 900 is small, the control unit controls the first exhaust control valve 134 to open to a larger extent, so as to increase the amount of gas separated by the distillation tower 900 per unit time, and increase the output of high-purity liquid obtained by separation.

[0055] Preferably, the first air pressure control valve 133 is controllably connected to the control unit, and the control unit can control the opening and closing of the first air pressure control valve 133 according to the monitoring result of the first pressure monitoring component 15 .

[0056] In one example, the first pressure monitoring component 15 is implemented as a pressure transmitter.

[0057] Preferably, each storage mechanism 20 further includes a second boosting device 24, and the second pipe group 22 further includes a second input pipe 223, a second output pipe 224, and a second exhaust pipe 225. The second input pipe 223 and the second output pipe 224 are respectively connected to the second boosting device 24, and the second output pipe 224 and the second exhaust pipe 225 are respectively connected to the storage tank 21. High-purity liquid can be passed into the second boosting device 24 through the second input pipe 223, and the second boosting device 24 is configured to vaporize at least part of the high-purity liquid flowing through the second boosting device 24 by using a fluid having a temperature higher than that of the high-purity liquid, and the vaporized gas enters the storage tank 21 through the second output pipe 224. It can be understood that when the gas enters the storage tank 21 through the second output pipe 224, the pressure in the storage tank 21 increases, so that the high-purity liquid stored in the storage tank 21 is autonomously and quickly output to the tank truck under the action of high pressure.

[0058] It is understandable that when the pressure in the storage tank 21 does not exceed the pressure in the tank truck, the gas is added to the storage tank 21 through the second booster 24. When the pressure in the storage tank 21 is higher than the pressure in the tank truck, the second booster 24 may not operate.

[0059] It will be understood by those skilled in the art that the entire high-purity liquid storage device does not require a pump. The present invention utilizes the static pressure of the liquid column and the air pressure to achieve the input, output and transfer of the high-purity liquid, thereby preventing the high-purity liquid from being contaminated by the pump during the input, output and transfer process, thereby ensuring the purity of the high-purity liquid finally introduced into the tank truck.

[0060] Before the high-purity liquid discharged from the temporary storage tank 11 is passed into the storage tank 21, the gas in the storage tank 21 is discharged through the second exhaust pipe 225 to reduce the pressure in the storage tank 21 so that the high-purity liquid discharged from the temporary storage tank 11 can be automatically injected into the storage tank 21.

[0061] In one example, the second pressure boosting device 24 is implemented as a carburetor.

[0062] Preferably, the second exhaust pipe 225 is connected to the middle of the distillation tower 900, so that the gas exhausted from the storage tank 21 can be returned to the distillation tower 900 as raw gas to be recycled, thereby increasing the recovery amount of pure liquid.

[0063] It is worth mentioning that the second valve group 23 also includes a second air pressure control valve 233 and a second exhaust control valve 234. The second air pressure control valve 233 is installed on the second input pipe 223 or the second output pipe 224, and is used to control whether the high-purity liquid enters the second boosting device 24 and controls the flow rate in the second input pipe 223 or controls whether the gas-liquid mixture enters the storage tank 21 and controls the flow rate in the second output pipe 224. The second exhaust control valve 234 is installed on the second exhaust pipe 225, and is used to control whether the gas in the storage tank 21 is discharged from the second exhaust pipe 225 and the flow rate of the second exhaust pipe 225.

[0064] Preferably, the second input pipe 223 is connected to the storage tank 21 , and part of the high-purity liquid stored in the storage tank 21 flows to the second boosting device 24 through the second input pipe 223 .

[0065] Preferably, the second exhaust control valve 234 is controllably connected to the control unit. Each group of the storage mechanism 20 also includes a second pressure monitoring component 25. The second pressure monitoring component 25 is used to monitor the pressure of the storage tank 21, and the second pressure monitoring component 25 is communicatively connected to the control unit. The control unit can control the opening and closing of the second exhaust control valve 234 and the degree of the second exhaust control valve 234. The control unit can control the opening and closing of the second exhaust control valve 234 according to the monitoring results of the second pressure monitoring component 25, and the control unit can adjust the opening and closing degree of the second exhaust control valve 234 according to the production capacity of the distillation tower 900 and the flow rate of the raw gas introduced into the distillation tower 900.

[0066] That is to say, within the production capacity of the distillation tower 900, when the flow rate of the raw gas entering the distillation tower 900 is large, the control unit controls the second exhaust control valve 234 to open to a smaller extent, so that the gas in the storage tank 21 is slowly output to the distillation tower 900, to prevent excessive gas from entering the distillation tower 900 per unit time and affecting the separation effect of the distillation tower 900, so that the distillation tower 900 can operate smoothly; when the flow rate of the raw gas entering the distillation tower 900 is small, the control unit controls the second exhaust control valve 234 to open to a larger extent, so as to increase the amount of gas separated by the distillation tower 900 per unit time, and increase the output of high-purity liquid obtained by separation.

[0067] Preferably, the second air pressure control valve 233 is controllably connected to the control unit, and the control unit can control the opening and closing of the second air pressure control valve 233 according to the monitoring result of the second pressure monitoring component 25 .

[0068] In one example, the second pressure monitoring element 25 is implemented as a pressure transmitter.

[0069] Furthermore, the storage tank 21 is connected to the bottom of the distillation tower 900 through a pipeline, and a valve is provided on the pipeline. The valve is used to control whether the low-temperature solution discharged from the bottom of the distillation tower 900 is discharged into the storage tank 21. When the temporary storage mechanism 10 needs to be repaired, the high-purity liquid discharged from the distillation tower 900 can be directly discharged into one of the storage tanks 21 to keep the distillation tower 900 running in real time, and the other storage tank 21 can be output to a tank truck, so that the high-purity liquid storage device can operate normally.

[0070] Also preferably, the first pipe group 12 further includes a first liquid discharge pipe 126, and the first valve group 13 further includes a first liquid discharge control valve 135. The first liquid discharge pipe 126 is connected to the temporary storage tank 11, and a tank truck can be connected to the first liquid discharge pipe 126. The first liquid discharge control valve 135 is installed on the first liquid discharge pipe 126, and is used to control whether the high-purity liquid discharged from the temporary storage tank 11 is discharged into the tank truck and the flow rate of the first liquid discharge pipe 126. When the storage mechanism 20 needs to be overhauled, the high-purity liquid discharged from the distillation tower 900 can be directly discharged into one of the temporary storage tanks 11 to keep the distillation tower 900 running in real time, and the other temporary storage tank 11 can be output to the tank truck, so that the high-purity liquid storage device can operate normally.

[0071] The present invention also provides a working method of the high-purity liquid storage device, comprising the following steps:

[0072] (1) Input operation: The temporary storage mechanism 10 performs the input operation.

[0073] The high-purity liquid discharged from the distillation tower 900 is injected into the temporary storage tank 11 through the first liquid inlet pipe 121 connected to the temporary storage tank 11 , so that the high-purity liquid separated by the distillation tower 900 is temporarily stored in the temporary storage tank 11 .

[0074] (2) Transfer operation: At the same time, the other temporary storage mechanism 10 containing high-purity liquid transfers the high-purity liquid to the storage mechanism 20.

[0075] (2.1) Pressurization step: a portion of the high-purity liquid stored in the temporary storage tank 11 provided in the other temporary storage mechanism 10 flows through the first boosting device 14 provided in the temporary storage mechanism 10 that performs the transfer operation, and the first boosting device 14 converts the high-purity liquid into gas, and the gas flows into the temporary storage tank 11 provided in the temporary storage mechanism 10 that is filled with high-purity liquid and performs the transfer operation, so that the internal pressure of the corresponding temporary storage tank 11 increases.

[0076] It is worth mentioning that when the pressure of the temporary storage tank 11 exceeds a preset value, the high-purity liquid stops being injected into the first pressurizing device 14 provided in the temporary storage mechanism 10 that performs the transfer operation.

[0077] (2.2) Transfer step: After the pressure increasing step, the high-purity liquid stored in the temporary storage tank 11 provided in the temporary storage mechanism 10 for performing the transfer operation is transferred to the storage tank 21 provided in the storage mechanism 20 under the action of high pressure.

[0078] Preferably, before executing the transfer step, it also includes (2.3) a pressure adjustment step: the gas in the storage tank 21 is discharged through the second exhaust pipe 225 connected thereto to reduce the pressure, so as to facilitate the transfer of the high-purity liquid in the temporary storage tank 11 provided in the temporary storage mechanism 10 that performs the transfer operation to the storage tank 21.

[0079] Preferably, the gas discharged from the storage tank 21 is introduced into the middle part of the distillation tower 900 to be recovered, thereby increasing the recovery amount of the high-purity liquid.

[0080] It is worth mentioning that the control unit adjusts the opening and closing degree of the second exhaust control valve 234 according to the production capacity of the distillation tower 900 and the flow rate of the raw gas introduced into the distillation tower 900, so that the gas discharged from the storage tank 21 can be injected into the distillation tower 900 within the production capacity of the distillation tower 900.

[0081] (2.3) Pressure reduction step: When the liquid level of the temporary storage tank 11 provided in the temporary storage mechanism 10 performing the transfer operation reaches the lowest liquid level, the temporary storage tank 11 stops transferring the high-purity liquid to the corresponding storage tank 21, and the gas in the temporary storage tank 11 is discharged from the first exhaust pipe 125 connected to the temporary storage tank 11, so that the pressure in the temporary storage tank 11 drops, so that the high-purity liquid discharged from the subsequent distillation tower 900 can smoothly enter the temporary storage tank 11.

[0082] Preferably, the gas discharged from the temporary storage tank 11 is introduced into the middle part of the distillation tower 900 to be recovered, thereby increasing the recovery amount of high-purity liquid.

[0083] Preferably, the control unit adjusts the opening and closing degree of the first exhaust control valve 134 according to the production capacity of the distillation tower 900 and the flow rate of the raw gas introduced into the distillation tower 900, so that the gas discharged from the temporary storage tank 11 can be injected into the distillation tower 900 within the production capacity of the distillation tower 900.

[0084] It is worth mentioning that when the pressure in the temporary storage tank 11 provided in the temporary storage mechanism 10 performing the transfer operation is lower than a set value, the control unit controls the first exhaust control valve 134 to close.

[0085] (3) Output operation: At the same time, the other storage mechanism 20 performs the output operation.

[0086] (3.1) Output step: The storage tank 21 provided in the storage mechanism 20 that performs the output operation can output high-purity liquid to a tank truck.

[0087] When the pressure of the storage tank 21 does not exceed the pressure of the tank truck, before the output step, it also includes (3.2), a pretreatment step: part of the high-purity liquid stored in the storage tank 21 provided for the storage mechanism 20 that performs the output operation flows through the second boosting device 24 provided for the storage mechanism 20 that performs the output operation, and the second boosting device 24 converts the high-purity liquid into gas, and the gas flows to the storage tank 21 provided for the storage mechanism 20 that is filled with high-purity liquid and performs the output operation, so that the pressure of the corresponding storage tank 21 exceeds the pressure of the tank truck, so as to facilitate subsequent operations.

[0088] When the temporary storage tank 11 provided in the temporary storage mechanism 10 performing the input operation is full, the two groups of the temporary storage mechanisms 10 switch to the next round, and the temporary storage mechanism 10 originally performing the input operation switches to perform the transfer operation, and the temporary storage mechanism 10 originally performing the transfer operation performs the input operation.

[0089] Similarly, when the storage tank 21 provided for the storage mechanism 20 performing the transfer operation is full, the two groups of the storage mechanisms 20 switch to the next round, and the storage mechanism 20 originally performing the transfer operation switches to perform the output operation, and the storage mechanism 20 originally performing the output operation performs the transfer operation.

[0090] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A high-purity liquid storage device, used to store high-purity liquid separated by a distillation tower, characterized in that: The high-purity liquid storage device comprises: Two groups of temporary storage mechanisms, each group of the temporary storage mechanisms includes a temporary storage tank, a first pipe group and a first boosting device, the first pipe group includes a first liquid inlet pipe, a first liquid outlet pipe, a first input pipe, a first output pipe and a first exhaust pipe, the first liquid inlet pipe is connected to the temporary storage tank and the bottom of the distillation tower, the high-purity liquid discharged from the bottom of the distillation tower is input into the temporary storage tank through the first liquid inlet pipe, the first liquid outlet pipe is connected to the temporary storage tank, the high-purity liquid stored in the temporary storage tank is discharged through the first liquid outlet pipe, the first input pipe and the first output pipe are respectively connected to the first boosting device, and the first output pipe and the first exhaust pipe are respectively connected to the temporary storage tank, the first input pipe is connected to the temporary storage tank, part of the high-purity liquid stored in the temporary storage tank is passed into the first boosting device through the first input pipe, the first boosting device is configured to vaporize at least part of the high-purity liquid flowing through the first boosting device by using a fluid having a temperature higher than that of the high-purity liquid, and the vaporized gas enters the temporary storage tank through the first output pipe; Two groups of storage mechanisms, each group of the storage mechanisms includes a storage tank and a second pipe group, the second pipe group includes a second liquid inlet pipe and a second liquid outlet pipe, the second liquid inlet pipe and the second liquid outlet pipe are respectively connected to the storage tank, wherein each of the second liquid inlet pipes is respectively connected to the first liquid outlet pipe connected to each of the two temporary storage tanks, the high-purity liquid discharged from any of the temporary storage tanks flows into any of the storage tanks through a pipeline, and the high-purity liquid stored in the storage tank is output to a tank truck through the second liquid outlet pipe, when the high-purity liquid discharged from the bottom of the distillation tower is injected into the temporary storage tank connected to the first liquid inlet pipe through any of the first liquid inlet pipes, the other temporary storage tank transfers the high-purity liquid stored in itself to one of the storage tanks through a pipeline, and the other storage tank outputs the high-purity liquid to the tank truck through the second liquid outlet pipe connected to itself.

2. The high-purity liquid storage device according to claim 1, characterized in that: The first exhaust pipe is connected to the middle part of the distillation tower, and the gas exhausted from the temporary storage tank is returned to the distillation tower as raw gas.

3. The high-purity liquid storage device according to claim 2, characterized in that: The high-purity liquid storage device is also provided with a control unit. Each group of the temporary storage mechanism also includes a first pressure monitoring component and a first valve group. The first valve group includes a first air pressure control valve and a first exhaust control valve. The first air pressure control valve is installed on the first input pipe or the first output pipe, and is used to control whether the high-purity liquid enters the first boosting device and controls the flow rate in the first input pipe or controls whether the gas enters the temporary storage tank and controls the flow rate in the first output pipe. The first exhaust control valve is installed on the first exhaust pipe, and is used to control whether the gas in the temporary storage tank is discharged from the first exhaust pipe and the flow rate of the first exhaust pipe. The first exhaust control valve and the first air pressure control valve are both controllably connected to the control unit. The control unit can adjust the opening and closing of the first exhaust control valve and the degree of opening and closing. The first pressure monitoring component is used to monitor the pressure of the temporary storage tank, and the first pressure monitoring component is communicatively connected to the control unit. The control unit can control the opening and closing of the first exhaust control valve and the first air pressure control valve according to the monitoring result of the first pressure monitoring component, and the control unit can adjust the degree of opening and closing of the first exhaust control valve according to the production capacity of the distillation tower and the flow rate of the raw gas introduced into the distillation tower.

4. The high-purity liquid storage device according to claim 3, characterized in that: Each of the storage mechanisms also includes a second boosting device, and the second tube group also includes a second input pipe, a second output pipe and a second exhaust pipe, the second input pipe and the second output pipe are respectively connected to the second boosting device, the second output pipe and the second exhaust pipe are respectively connected to the storage tank, the second input pipe is connected to the storage tank, part of the high-purity liquid stored in the storage tank is passed into the second boosting device through the second input pipe, the second boosting device is configured to utilize a fluid with a temperature higher than that of the high-purity liquid to vaporize at least part of the high-purity liquid flowing through the second boosting device, the vaporized gas enters the storage tank through the second output pipe, and the gas in the storage tank is discharged through the second exhaust pipe.

5. The high-purity liquid storage device according to claim 4, characterized in that: The second exhaust pipe is connected to the middle part of the distillation tower, and the gas exhausted from the storage tank is returned to the distillation tower as raw gas.

6. The high-purity liquid storage device according to claim 5, characterized in that: Each storage mechanism also includes a second valve group and a second pressure monitoring device. The second valve group also includes a second air pressure control valve and a second exhaust control valve. The second air pressure control valve is installed on the second input pipe or the second output pipe, and is used to control whether the high-purity liquid enters the second boosting device and controls the flow rate in the second input pipe or controls whether the gas-liquid mixture enters the storage tank and controls the flow rate in the second output pipe. The second exhaust control valve is installed on the second exhaust pipe, and is used to control whether the gas in the storage tank is discharged from the second exhaust pipe and the flow rate of the second exhaust pipe. The second exhaust control valve is controllably connected to the control unit. The second pressure monitoring device is used to monitor the pressure of the storage tank, and the second pressure monitoring device is communicatively connected to the control unit. The control unit can control the opening and closing of the second exhaust control valve and its degree. The control unit can control the opening and closing of the second exhaust control valve according to the monitoring result of the second pressure monitoring device, and the control unit can adjust the opening and closing degree of the second exhaust control valve according to the production capacity of the distillation tower and the flow rate of the raw gas introduced into the distillation tower.

7. The working method of the high-purity liquid storage device is characterized in that: The high-purity liquid storage device according to claim 6 comprises the following operations: The temporary storage mechanism performs an input operation: the high-purity liquid discharged from the distillation tower is automatically injected into the temporary storage tank through the first liquid inlet pipe connected to the temporary storage tank provided with the temporary storage mechanism performing the input operation; At the same time, another temporary storage mechanism filled with high-purity liquid performs a transfer operation to one storage mechanism, and the transfer operation includes the following steps: Part of the high-purity liquid stored in the temporary storage tank provided in the other temporary storage mechanism flows through the first boosting device provided in the temporary storage mechanism that performs the transfer operation, and the first boosting device converts the high-purity liquid into gas, and the gas flows to the temporary storage tank provided in the temporary storage mechanism that is filled with high-purity liquid and performs the transfer operation; When the pressure of the temporary storage tank provided by the other temporary storage mechanism is higher than a preset value, the high-purity liquid stored in the temporary storage tank provided by the temporary storage mechanism performing the transfer operation is transferred to the storage tank provided by one storage mechanism under the action of high pressure; When the liquid level of the temporary storage tank provided by the other temporary storage mechanism reaches the lowest liquid level, the temporary storage tank provided by the temporary storage mechanism performing the transfer operation stops transferring to the storage tank provided by the first storage mechanism, and the gas in the temporary storage tank provided by the temporary storage mechanism performing the transfer operation is discharged from the first exhaust pipe connected to the temporary storage tank, thereby reducing the pressure of the temporary storage tank; At the same time, the other storage mechanism performs an output operation: the storage tank provided in the storage mechanism performing the output operation outputs high-purity liquid to the tank truck; When the temporary storage tank provided for the temporary storage mechanism that performs the input operation is full, the two groups of the temporary storage mechanisms switch, and the temporary storage mechanism that originally performs the input operation switches to perform the transfer operation, and the temporary storage mechanism that originally performs the transfer operation performs the input operation; when the storage tank provided for the storage mechanism that performs the transfer operation is full, the two groups of the storage mechanisms switch, and the storage mechanism that originally performs the transfer operation switches to perform the output operation, and the storage mechanism that originally performs the output operation performs the transfer operation, and the cycle continues.

8. The working method of the high-purity liquid storage device according to claim 7, characterized in that: The gas in the temporary storage tank provided by the temporary storage mechanism for performing the transfer operation is discharged into the middle part of the distillation tower from the first exhaust pipe connected to the temporary storage tank.

9. The working method of the high-purity liquid storage device according to claim 8, characterized in that: When the pressure of the storage tank provided for the storage mechanism performing the output operation does not exceed the pressure of the tank truck, part of the high-purity liquid stored in the storage tank provided for the storage mechanism performing the output operation flows through the second boosting device provided for the storage mechanism performing the output operation, and the second boosting device converts the high-purity liquid into gas, and the gas flows to the storage tank provided for the storage mechanism performing the output operation which is filled with high-purity liquid, and the high-purity liquid is output to the tank truck after the pressure of the corresponding storage tank exceeds the pressure of the tank truck.

10. The working method of the high-purity liquid storage device according to claim 9, characterized in that: Before the high-purity liquid in the temporary storage tank provided in the temporary storage mechanism performing the transfer operation is transferred to the storage tank provided in the storage mechanism under the action of high pressure, the gas in the storage tank is discharged to the middle of the distillation tower through the second exhaust pipe connected thereto.

Images