Liquid discharge device of low-pressure buffer tank

Abstract

The utility model discloses a low-pressure buffer tank drainage device which comprises a low-pressure buffer tank and a drainage pipe communicated with the low-pressure buffer tank, a liquid inlet pipe is arranged on one side, opposite to the drainage pipe, of the low-pressure buffer tank, an electric isolation plate is arranged in the low-pressure buffer tank, a metal net is arranged on the lower layer of the electric isolation plate, and a liquid outlet pipe is arranged on the lower layer of the metal net. The lower part of the low-pressure buffer tank is communicated with the inert gas storage tank; a torch is arranged on one side, opposite to the inert gas storage tank, of the lower part of the low-pressure buffer tank; and a pollution discharge unit is arranged at the bottom of the low-pressure buffer tank. The liquid discharging device of the low-pressure buffer tank not only solves the problems of liquid discharging and waste residue treatment of the buffer tank, but also protects personal safety and atmosphere.

Description

TECHNICAL FIELD

[0001] The utility model relates to low pressure storage equipment technical field, especially a kind of low pressure buffer tank liquid discharge device. BACKGROUND

[0002] Low pressure buffer tank liquid discharge is connected to drain pipe orifice by long steel wire hose on site, then discharged to ton box, first, ton box must be placed in low position, second, under the condition of no one monitoring, toxic and harmful gas in device is discharged, causing secondary harm, third, operating personnel inhale toxic and harmful gas, causing harm to body, and also causing pollution to atmosphere.

[0003] How to avoid that waste gas is discharged together under the condition of no one monitoring on site when low pressure buffer tank site waste is discharged, causing harm to human body and waste residue is condensed in buffer tank bottom, causing drain valve blockage is the technical problem that the person skilled in the art urgently solves. UTILITY MODEL CONTENT

[0004] To solve the above technical problem, the utility model provides a kind of low pressure buffer tank liquid discharge device, not only solve the problem of buffer tank liquid discharge and waste residue, but also protect personal safety and atmosphere.

[0005] The technical scheme provided by the utility model is as follows:

[0006] A kind of low pressure buffer tank liquid discharge device, including low pressure buffer tank and the liquid discharge pipe being communicated with low pressure buffer tank, the side of low pressure buffer tank opposite to liquid discharge pipe is equipped with liquid inlet pipe, the inside of low pressure buffer tank is equipped with electric isolation plate, the lower layer of electric isolation plate is equipped with metal net, the lower part of low pressure buffer tank is communicated with inert gas storage tank, the side of inert gas storage tank opposite to low pressure buffer tank lower part is equipped with torch;The bottom of low pressure buffer tank is equipped with drain unit.

[0007] Preferably, pressure remote transmission and on-site pressure gauge are arranged at electric isolation plate of low pressure buffer tank.

[0008] Preferably, glass plate liquid level meter is arranged at electric isolation plate of low pressure buffer tank.

[0009] Preferably, outer buoy liquid level meter is arranged above electric isolation plate.

[0010] Preferably, buffer plate is arranged in the inside of low pressure buffer tank at the communication part of low pressure buffer tank and liquid inlet pipe.

[0011] Preferably, electric isolation plate is arranged at 1 / 6-1 / 4 of the height of the inside of low pressure buffer tank.

[0012] Preferably, the metal net is steel wire net, the mesh diameter of metal net is 0.3-0.5cm, and the thickness of metal net is 1.5-2.5cm.

[0013] Preferably, the blowdown unit comprises two blowdown lines arranged side by side, a valve is arranged on each blowdown line, and a blowdown pump is arranged on one of the blowdown lines.

[0014] The low-pressure buffer tank liquid discharge device has the following advantages compared with the prior art.

[0015] The low-pressure buffer tank liquid discharge device of the utility model discloses through the setting of electric isolation board, metal net and other structures, the waste liquid part of waste residue and top gas can be isolated through the electric isolation board, the top gas rises to the top of the low-pressure buffer tank and will not be discharged with the liquid, the larger particle components are intercepted through the metal net, the liquid can seep into the bottom of the low-pressure buffer tank and finally flow to the torch, and the larger particle components can be intercepted and adsorbed on the surface of the metal net, which not only solves the problem of buffer tank liquid discharge and waste residue treatment, but also protects personal safety and the atmosphere. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments in the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0017] Figure 1 It is a structural schematic view of the low-pressure buffer tank liquid discharge device in the embodiment of the utility model.

[0018] Figure 2 It is a structural schematic view of the low-pressure buffer tank in the embodiment of the utility model.

[0019] Figure 3 It is a plan view of the low-pressure buffer tank when the electric isolation board is not opened in the embodiment of the utility model.

[0020] Figure 4 It is a plan view of the low-pressure buffer tank when the electric isolation board is opened in the embodiment of the utility model.

[0021] Reference signs:

[0022] 1. Low-pressure buffer tank; 2. Drain pipe; 3. Inlet pipe; 4. Electric isolation plate; 5. Metal mesh; 6. Inert gas storage tank; 7. Flare; 8. Sewage discharge unit; 9. Remote pressure transmission and on-site pressure gauge; 10. Glass plate level gauge; 11. External float level gauge; 12. Buffer plate; 13. Valve; 14. Sewage pump. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] like Figures 1-4 As shown, this utility model embodiment provides a low-pressure buffer tank drainage device, including a low-pressure buffer tank 1 and a drainage pipe 2 connected to the low-pressure buffer tank 1. An inlet pipe 3 is provided on the side of the low-pressure buffer tank 1 opposite to the drainage pipe 2. An electric isolation plate 4 is provided inside the low-pressure buffer tank 1. A metal mesh 5 is provided on the lower layer of the electric isolation plate 4. The lower part of the low-pressure buffer tank 1 is connected to an inert gas storage tank 6. The inert gas storage tank 6 can provide inert gas to pressurize the low-pressure buffer tank 1. A flare 7 is provided on the side of the lower part of the low-pressure buffer tank 1 opposite to the inert gas storage tank 6. After the low-pressure buffer tank 1 is pressurized by inert gas, the liquid inside the low-pressure buffer tank 1 is drained, and the inert gas is discharged to the flare network. A sewage discharge unit 8 is provided at the bottom of the low-pressure buffer tank 1.

[0025] In this embodiment, a pressure remote transmission and local pressure gauge 9 are installed at the electrically operated isolation plate 4 on the low-pressure buffer tank 1. When the inert gas pressurizes the low-pressure buffer tank 1, the pressure is transmitted remotely to the central control DCS interface. Operators can observe the pressurization on-site through the pressure remote transmission and local pressure gauge 9, and simultaneously transmit the pressure status to the DCS personnel to inform the on-site personnel, forming a double insurance. Because the on-site pressure and the DCS pressure should be nearly identical, the pressure remote transmission can be monitored by the DCS central control, and the on-site pressure gauge can be viewed on-site by the on-site personnel. A glass plate level gauge 10 is installed at the electrically operated isolation plate 4 on the low-pressure buffer tank 1; an external float level gauge 11 is installed above the electrically operated isolation plate 4. By setting two different level gauges: the external float level gauge 11 and the glass plate level gauge 10, the following advantages are available: they serve as backups for each other, preventing damage or inaccurate measurements when only one level gauge is used; and the two level gauges installed in different positions can detect the entire level of the low-pressure buffer tank 1.

[0026] In this embodiment, a buffer plate 12 is provided inside the low-pressure buffer tank 1 where it connects with the liquid inlet pipe 3, which can reduce the liquid flow rate.

[0027] In this embodiment, the electric isolation plate 4 is arranged at 1 / 6-1 / 4 of the internal height of the low-pressure buffer tank 1. Since the electric isolation plate 1 needs to be manually started by an operator on site, the electric isolation plate 1 is preferably designed at 1 / 5 of the internal height of the low-pressure buffer tank 1, which is more reasonable.

[0028] In this embodiment, the electric isolation plate 4 is manually started on site to isolate the waste liquid and part of the waste residue from the top gas. When the electric isolation plate 4 is not started, the state is that the electric isolation plate 4 is attached to the inner wall of the low-pressure buffer tank 1 and is in a retracted state. When the bottom needs to be isolated, the electric isolation plate 4 is started, and the electric isolation plate 4 slowly opens to play a complete isolation role.

[0029] In this embodiment, the metal mesh 5 is a steel wire mesh, the mesh hole diameter of the metal mesh 5 is 0.3-0.5 cm, and the thickness of the metal mesh 5 is 1.5-2.5 cm. The principle of the metal mesh 5 is that the larger particle components will be intercepted by the metal mesh, the liquid will penetrate into the bottom, and the larger particle components will be intercepted and adsorbed on the surface of the metal mesh 5. The metal mesh 5 is simple to disassemble and clean, and can be reused by only disassembling, pulling out the metal mesh 5, and washing the surface with a high-pressure water gun. When cleaning is needed, the electric isolation plate 4 is only needed to be closed, so that the working area is isolated from the metal mesh 5 being cleaned.

[0030] In this embodiment, the blowdown unit 8 includes two blowdown pipelines arranged side by side, each of the blowdown pipelines is provided with a valve 13, and one of the blowdown pipelines is provided with a blowdown pump 14. There are two ways and methods to discharge the waste liquid and part of the waste residue. When the electric isolation plate 4 is isolated, the first way is to pressurize the part below the electric isolation plate 4 to 2 MPa by nitrogen and then discharge to the sewage tank area through one of the blowdown pipelines, and after the blowdown is completed, the pressure of the part below the electric isolation plate 4 is discharged to the flare pipeline network through the flare 7; the second way is to use the blowdown pump 14 (self-priming pump) on the other blowdown pipeline to pump the part below the electric isolation plate 4 to the sewage tank area when there is more waste residue. (The blowdown pump 14 mentioned here is an external mixing type self-priming pump, which is filled with water in the pump shell before starting, and after starting, the impeller rotates at high speed to make the water in the impeller groove flow to the volute, forming a vacuum, and the working temperature is-14℃ to 80℃, which fully meets the process requirements.)

[0031] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A low-pressure surge tank liquid discharge device, comprising a low-pressure surge tank (1) and a liquid discharge pipe (2) in communication with the low-pressure surge tank (1), wherein the low-pressure surge tank (1) is provided with a liquid inlet pipe (3) on the side opposite to the liquid discharge pipe (2). The low-pressure buffer tank (1) is internally provided with an electric isolation plate (4), the lower layer of the electric isolation plate (4) is provided with a metal mesh (5), the lower part of the low-pressure buffer tank (1) is communicated with an inert gas storage tank (6), the side of the lower part of the low-pressure buffer tank (1) opposite to the inert gas storage tank (6) is provided with a flare (7); the bottom of the low-pressure buffer tank is provided with a blowdown unit (8).

2. The low-pressure surge tank drain apparatus according to claim 1, characterized by, The electric isolation plate (4) of the low-pressure buffer tank (1) is provided with a pressure remote transmission and on-site pressure gauge (9).

3. The low pressure surge tank drain apparatus of claim 1, wherein, The electric isolation plate (4) of the low-pressure buffer tank (1) is provided with a glass plate liquid level meter (10).

4. The low pressure surge tank drain apparatus of claim 1, wherein, The electric isolation plate (4) is provided with an outer buoy liquid level meter (11) above.

5. The low pressure surge tank drain apparatus of claim 1, wherein, The inside of the low-pressure buffer tank (1) at the communication part of the low-pressure buffer tank (1) and the liquid inlet pipe (3) is provided with a buffer plate (12).

6. The low-pressure surge tank drain apparatus according to any one of claims 1 to 5, characterized by, The electric isolation plate (4) is arranged at 1 / 6-1 / 4 of the internal height of the low-pressure buffer tank (1).

7. The low-pressure surge tank drain apparatus according to any one of claims 1 to 5, characterized by, The metal mesh (5) is a steel wire mesh, the mesh hole diameter of the metal mesh (5) is 0.3-0.5 cm, and the thickness of the metal mesh (5) is 1.5-2.5 cm.

8. The low pressure surge tank drain of any one of claims 1-5, wherein, The blowdown unit (8) comprises blowdown pipelines, two blowdown pipelines are arranged in parallel, a valve (13) is arranged on each blowdown pipeline, and a blowdown pump (14) is arranged on one of the blowdown pipelines.

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