A material discharging system and a material discharging method on a storage tank

Abstract

The present invention discloses a discharging system on a storage tank, including a storage tank, a storage tank emptying port on the top of the storage tank, and a feed pipe extending vertically into the bottom of the storage tank, the feed pipe vertically passing through the storage tank, the upper end of the feed pipe extending into a cylinder arranged above the storage tank, a liquid inlet and a cylinder emptying port are provided above the cylinder, a downwardly arranged discharging pipe is connected to the bottom of the cylinder, the discharging port at the lower end of the discharging pipe is located below the bottom of the storage tank, the lower end of the discharging pipe is connected to an emptying branch, and the discharging port at the lower end of the discharging pipe, the emptying branch, the storage tank emptying port, the liquid inlet and the cylinder emptying port are all provided with a switch valve. The above system realizes discharging through the feed pipe and the discharging pipe, and the cylinder serves as a buffer container during the discharging process, and its volume is smaller than that of the storage tank. When there is a problem with the switch valve on the discharging pipe, the material in the emptying box can be emptied for maintenance, which is convenient and quick. The present invention also discloses a discharging method for a storage tank for use with the discharging system on the storage tank.

Description

Technical Field

[0001] The invention relates to the technical field of discharge devices, and in particular to a discharge system and a discharge method on a storage tank. Background Art

[0002] The production of chemical synthetic drugs requires a certain amount of material from a high-level tank to be placed in the reactor to participate in the reaction. After the discharge is completed, the material needs to be blocked so that too much material will not be added to the reactor to ensure the accuracy of the reaction.

[0003] At present, the material discharge is controlled by adding a ball valve to the discharge pipe at the bottom of the high-position tank to control the flow and blockage of the material. This method can ensure the flow and blockage of the material when there is no problem with the sealing of the ball valve on the discharge pipe at the bottom of the high-position tank. However, once there is a problem with the sealing of the ball valve, especially the internal seal is not tight, the material cannot be completely blocked, which affects the composition ratio of the reaction materials. The ball valve needs to be replaced to ensure normal use. However, before replacing the ball valve, all the materials in the high-position tank must be emptied before maintenance can be carried out. This has high maintenance costs, long time cycles, and great difficulty. Summary of the invention

[0004] The invention aims to provide a material storage tank discharge system that realizes the function of normal discharge while solving the problem that the ball valve on the discharge pipe at the bottom of the material storage tank needs to be completely emptied before replacement after the sealing problem occurs in the existing technical solution, so that the replacement of the discharge ball valve with problems is convenient, fast and simple. Further, the invention also specifically discloses a discharge method of the material storage tank discharge system.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A material discharging system on a storage tank comprises a storage tank, wherein a storage tank emptying port is arranged above the storage tank, and the system further comprises a feed pipe extending vertically into the bottom of the storage tank, the upper end of the feed pipe vertically passes through the storage tank, a cylinder is arranged above the storage tank, the upper end of the feed pipe extends into the cylinder, the volume of the cylinder is smaller than the volume of the storage tank, a liquid inlet and a cylinder emptying port are provided at the upper end of the cylinder, a downwardly arranged discharge pipe is connected below the cylinder, the discharge port at the lower end of the discharge pipe is located below the bottom of the storage tank, the discharge port at the lower end of the discharge pipe is connected to an emptying branch, and a switch valve is arranged on the lower end of the discharge pipe, the emptying branch, the storage tank emptying port, the liquid inlet and the cylinder emptying port.

[0007] Preferably, the storage tank is a high-level tank.

[0008] Preferably, the upper end surface of the cylinder is upwardly provided with a groove matching the outer diameter of the feed pipe, the upper end of the feed pipe extends into the groove, the upper end of the feed pipe is located above the liquid inlet, and the volume of the cylinder is larger than the volume of the discharge pipe.

[0009] Preferably, the liquid inlet and the discharge port at the lower end of the discharge pipe are both connected with a sight glass.

[0010] Preferably, the volume of the cylinder is 1.1-2 times the volume of the discharge pipe.

[0011] Preferably, the switch valve is a ball valve.

[0012] A method for discharging materials from a storage tank is used based on the above-mentioned discharging system on the storage tank, and is characterized by comprising the following steps performed in sequence:

[0013] S1, close the switch valve on the outlet at the lower end of the discharge pipe, the switch valve of the emptying branch and the switch valve of the storage tank outlet, open the switch valve of the liquid inlet and the switch valve of the cylinder outlet, add liquid material from the liquid inlet to the cylinder, the liquid material is the liquid material stored in the storage tank, the liquid inlet includes an introduction section arranged upward at the upper end of the cylinder, and the liquid material rises to the introduction section;

[0014] S2. Close the switch valve of the liquid inlet and the switch valve of the cylinder emptying port, open the switch valve of the storage tank emptying port and the switch valve on the discharge port at the lower end of the discharge pipe, and discharge the material in the storage tank through the discharge pipe.

[0015] Preferably, after step S1 and step S2, the following steps are also performed sequentially:

[0016] S3, closing the switch valve on the discharge port at the lower end of the discharge pipe, opening the switch valve of the cylinder emptying port, opening the switch valve of the emptying branch, and discharging the liquid material in the cylinder and the discharge pipe through the emptying branch;

[0017] S4, inspecting the switch valve on the discharge port at the lower end of the discharge pipe;

[0018] S5. Repeat step S1 and step S2 to discharge the liquid material in the storage tank.

[0019] The beneficial effects of the present invention are as follows: the present invention provides a storage tank upper discharge system, which realizes the discharge of the storage tank by sucking the material through the feed pipe and discharging the material through the discharge pipe. The cylinder body serves as a buffer container during the discharge process, and its volume is much smaller than the volume of the storage tank. When there is a problem with the switch valve on the discharge pipe, it only needs to empty the material in the box body for inspection and replacement, which is convenient and quick. It solves the problem in the prior art that the bottom discharge valve must be inspected and repaired after all the materials in the high-level tank are emptied. Furthermore, the present invention also discloses in detail a storage tank discharge method for use with the storage tank upper discharge system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a material storage tank upper discharging system provided by an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.

[0022] Markings in the figure: 1 is a storage tank, 2 is an emptying port of the storage tank, 3 is a feed pipe, 4 is a cylinder, 5 is a liquid inlet, 6 is an emptying port of the cylinder, 7 is a discharge pipe, 8 is an emptying branch, 9 is a sight glass, and 10 is a switch valve. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] like Figure 1-Figure 2 As shown, a material storage tank upper discharge system includes a material storage tank 1, a material storage tank emptying port 2 is arranged above the material storage tank 1, and also includes a feed pipe 3 vertically extending into the bottom of the material storage tank 1, the feed pipe 3 vertically passes through the material storage tank 1, and the upper end of the feed pipe 3 extends into a cylinder 4 arranged above the material storage tank 1, the volume of the cylinder 4 is smaller than the volume of the material storage tank 1, and a liquid inlet 5 and a cylinder emptying port 6 are provided at the upper end of the cylinder 4, and a downwardly arranged discharge pipe 7 is connected to the lower part of the cylinder 4, the discharge port at the lower end of the discharge pipe 7 is located below the bottom of the material storage tank 1, and the lower end of the discharge pipe 7 is connected to an emptying branch 8, and the discharge port at the lower end of the discharge pipe 7, the emptying branch 8, the material storage tank emptying port 2, the liquid inlet 5 and the cylinder emptying port 6 are all provided with a switch valve 10.

[0026] In this way, the emptying branch 8 is arranged above the discharge port of the discharge pipe 7 and is arranged adjacent to it. The lower end of the discharge pipe is connected to the reactor, and the liquid inlet 5 and the cylinder emptying port 6 are arranged on the upper end surface of the cylindrical cylinder 4. When the above device is used for the first time, the switch valve at the lower end of the discharge pipe 7 and the switch valve at the lower end of the emptying branch 8 are first closed, the liquid inlet 5 and the cylinder emptying port 6 are opened, and the same material as the storage tank 1 is added to the cylinder 4 from the liquid inlet 5. The liquid inlet 5 is provided with an introduction section with one end connected to the cylinder 4 upward, and the liquid rises to the introduction section. Then close the switch valves on the liquid inlet 5, the cylinder emptying port 6 and the emptying branch 8, open the switch valves on the storage tank emptying port 2 and the lower end of the discharge pipe 7, and the materials in the cylinder 4 and the discharge pipe 7 are discharged through the lower end of the discharge pipe 7 under the action of their own weight. When they are discharged to a certain extent, a certain vacuum is formed in the cylinder 4. The materials in the storage tank 1 will enter the cylinder 4 through the feed pipe 3 due to the pressure difference between the tank and the cylinder 4, thereby releasing the materials in the tank into the reactor. Complete normal discharge. When the switch valve at the lower end of the discharge pipe 7 fails and cannot block the abnormal leakage of materials to the reactor. Open the switch valve of the cylinder emptying port 6, the pressure in the cylinder 4 returns to atmospheric pressure, open the switch valve on the emptying branch 8, and put the materials in the cylinder 4 and the discharge pipe 7 into a temporary container. After that, the switch valve at the lower end of the discharge pipe 7 with sealing problems can be repaired. After the replacement is completed, repeat the above steps to discharge normally.

[0027] The above device solves the problem in the prior art that the bottom discharge valve can only be inspected after all the materials in the high-level tank are emptied. In this embodiment, the cylinder is preferably a cylindrical cylinder for easy access. At the same time, it is well known to those skilled in the art that in order to form the above vacuum, each component needs to be tightly connected to avoid leakage. This is common knowledge known to those skilled in the art and will not be repeated here.

[0028] In this embodiment, the storage tank 1 is a high-level tank.

[0029] In this way, the high-level tank has a large capacity and can store a lot of materials. It is widely used in various industries and is more suitable for the discharging system on the storage tank.

[0030] In this embodiment, a groove matching the outer diameter of the feed pipe 3 is provided upward on the upper end surface of the cylinder 4, the upper end of the feed pipe 3 extends into the groove, the upper end of the feed pipe 3 is located above the liquid inlet 5, and the volume of the cylinder 4 is greater than the volume of the discharge pipe 7.

[0031] In this way, the injection volume can be reduced, and the injected material will not be stored in the storage tank, ensuring that under normal production conditions, after closing the switch valve at the lower end of the discharge pipe, there is enough material in the cylinder for the next start-up, without the need for additional injection and drainage, which is convenient for continuous use.

[0032] The volume of the cylinder 4 is larger than that of the discharge pipe 7 to ensure that there is enough liquid material in the cylinder to enter the discharge pipe to form a continuous flow, to ensure that a certain vacuum is formed in the cylinder, and to avoid the discharge failure caused by the backflow of material in the discharge pipe or the entry of air after the vacuum is formed. The volume of the discharge pipe 7 is the volume of the vertical section in the figure.

[0033] In this embodiment, the liquid inlet 5 and the discharge port at the lower end of the discharge pipe 7 are both connected with a sight glass 9.

[0034] This makes it easier for personnel to observe.

[0035] In this embodiment, the volume of the cylinder 4 is 1.1-2 times the volume of the discharge pipe 7.

[0036] Thus, the above is a preferred method based on practical results. Under the condition of ensuring that the vacuum condition is used to achieve drainage, the system manufacturing cost is taken into consideration.

[0037] In this embodiment, the switch valve 10 is a ball valve.

[0038] In this way, the ball valve has a good sealing effect.

[0039] The present invention also discloses a method for discharging materials from a storage tank, which is based on the above-mentioned discharging system on the storage tank and includes the following steps performed in sequence:

[0040] S1, close the switch valve on the discharge port at the lower end of the discharge pipe 7, the switch valve of the emptying branch 8 and the switch valve on the storage tank emptying port 2, open the switch valve of the liquid inlet 5 and the switch valve of the cylinder emptying port 6, add liquid material from the liquid inlet 5 to the cylinder 4, the liquid material is the liquid material stored in the storage tank 1, the liquid inlet 5 includes an introduction section arranged upward at the upper end of the cylinder 4, and the liquid material rises to the introduction section;

[0041] S2. Close the switch valve of the liquid inlet 5 and the switch valve of the cylinder emptying port 6, open the switch valve of the storage tank emptying port 2 and the switch valve on the discharge port at the lower end of the discharge pipe 7, and the material in the storage tank 1 is discharged through the discharge pipe 7.

[0042] Thus, the above disclosed method for using the discharge system on the storage tank is simple and easy to operate. The switch valves at the emptying port 2 of the storage tank and the lower end of the discharge pipe 7 are opened, and the materials in the cylinder 4 and the discharge pipe 7 are discharged through the lower end of the discharge pipe 7 under the action of their own weight. When the materials are discharged to a certain extent, a certain vacuum is formed in the cylinder 4, and the materials in the storage tank 1 will enter the cylinder 4 through the feed pipe 3 due to the pressure difference between the tank itself and the cylinder 4.

[0043] In this embodiment, the following steps are also performed sequentially after step S1 and step S2:

[0044] S3, close the switch valve on the discharge port at the lower end of the discharge pipe 7, open the switch valve of the cylinder emptying port 6, open the switch valve on the emptying branch 8, and discharge the liquid material in the cylinder 4 and the discharge pipe 7 through the emptying branch 8;

[0045] S4, inspecting the switch valve on the discharge port at the lower end of the discharge pipe 7;

[0046] S5. Repeat steps S1 and S2 to discharge the liquid material in the storage tank 1.

[0047] Thus, the above specifically discloses a specific method for dealing with the situation when the switch valve at the lower end of the discharge pipe 7 is damaged and cannot be sealed and closed. Based on the above method, only the materials in the cylinder 4 and the discharge pipe 7 need to be emptied for maintenance, which takes a short time to maintain, has little material loss, and has low maintenance cost.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A material storage tank upper discharge system, comprising a material storage tank (1), wherein a material storage tank emptying port (2) is arranged above the material storage tank (1), characterized in that: The invention also comprises a feed pipe (3) extending vertically into the bottom of the storage tank (1), the upper end of the feed pipe (3) vertically passing through the storage tank (1), a cylinder (4) being arranged above the storage tank (1), the upper end of the feed pipe (3) extending into the cylinder (4), the volume of the cylinder (4) being smaller than the volume of the storage tank (1), the upper end of the cylinder (4) being provided with a liquid inlet (5) and a cylinder emptying port (6), the lower end of the cylinder (4) being connected with a downwardly arranged discharge pipe (7), the discharge port at the lower end of the discharge pipe (7) being located below the bottom of the storage tank (1), the lower end of the discharge pipe (7) being connected with an emptying branch (8), the discharge port at the lower end of the discharge pipe (7), the emptying branch (8), the storage tank emptying port (2), the liquid inlet (5) and the cylinder emptying port (6) being all provided with a switch valve (10).

2. The material storage tank discharge system according to claim 1, characterized in that: The storage tank (1) is a high-position tank.

3. The material storage tank discharge system according to claim 1, characterized in that: The upper end surface of the cylinder (4) is provided with a groove matching the outer diameter of the feed pipe (3), the upper end of the feed pipe (3) extends into the groove, the upper end of the feed pipe (3) is located above the liquid inlet (5), and the volume of the cylinder (4) is greater than the volume of the discharge pipe (7).

4. The material storage tank discharge system according to claim 3, characterized in that: The liquid inlet (5) and the lower outlet of the outlet pipe (7) are both connected to a sight glass (9).

5. The material storage tank discharge system according to claim 3, characterized in that: The volume of the cylinder (4) is 1.1 to 2 times the volume of the discharge pipe (7).

6. The material storage tank discharge system according to claim 1, characterized in that: The switch valve (10) is a ball valve.

7. A method for discharging materials from a storage tank, based on the discharging system on the storage tank according to any one of claims 1 to 6, characterized in that: It includes the following steps which are executed in sequence: S1, closing the switch valve on the outlet at the lower end of the discharge pipe (7), the switch valve of the emptying branch (8) and the switch valve of the storage tank emptying port (2), opening the switch valve of the liquid inlet (5) and the switch valve of the cylinder emptying port (6), adding liquid material from the liquid inlet (5) into the cylinder (4), the liquid material being the liquid material stored in the storage tank (1), the liquid inlet (5) comprising an introduction section arranged upwardly at the upper end of the cylinder (4), and the liquid material rising until it reaches the introduction section; S2, closing the switch valve of the liquid inlet (5) and the switch valve of the cylinder emptying port (6), opening the switch valve of the storage tank emptying port (2) and the switch valve on the discharge port at the lower end of the discharge pipe (7), and discharging the material in the storage tank (1) through the discharge pipe (7).

8. The method for discharging materials from a storage tank as claimed in claim 7, characterized in that: The following steps are also included after step S1 and step S2, which are performed sequentially: S3, closing the switch valve on the discharge port at the lower end of the discharge pipe (7), opening the switch valve of the cylinder emptying port (6), opening the switch valve of the emptying branch (8), and discharging the liquid material in the cylinder (4) and the discharge pipe (7) through the emptying branch (8); S4, inspecting the switch valve on the outlet at the lower end of the outlet pipe (7); S5. Repeat step S1 and step S2 to discharge the liquid material in the storage tank (1).

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