Dehydration pressure buffering system for liquefied gas spherical tank

Abstract

The utility model relates to the field of liquefied gas spherical tanks, in particular to a liquefied gas spherical tank dehydration pressure buffering system which comprises a liquefied gas spherical tank, a water cutting device and a dehydration buffering tank, the liquefied gas spherical tank is connected to the water cutting device through a spherical tank outlet pipeline, and a bottom outlet of the water cutting device is connected to an oily sewage pipe network through a water cutting device drainage pipeline. A dewatering buffer tank inlet pipeline is connected to the water cutting device drainage pipeline, the dewatering buffer tank inlet pipeline is connected to an inlet of a dewatering buffer tank, a bottom outlet of the dewatering buffer tank is connected to an oily sewage pipe network through a buffer tank drainage pipeline, and a top outlet of the dewatering buffer tank is connected to a torch system through a buffer tank exhaust pipeline. According to the dehydration pressure buffer system for the liquefied gas spherical tank, the buffer tank is additionally arranged at the rear part of the water cutting device, so that oil-containing sewage discharged by the water cutting device is prevented from being directly discharged into an oil-containing sewage pipe network to cause pressure impact on the pipe network, the pressure can be buffered and released by the buffer tank, and the oil discharge overhaul operation of other equipment and facilities is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of liquefied balloon tanks, specifically to a dehydration pressure buffer system for liquefied balloon tanks. Background Technology

[0002] In the production process, liquefied petroleum gas (LPG) products may contain a small amount of water, which accumulates at the bottom of the spherical tank. Prolonged accumulation can negatively impact LPG quality and necessitates timely removal. Furthermore, the presence of light components in the LPG products makes them highly vaporizable, potentially causing a significant and unpredictable increase in pressure within the oily wastewater pipeline network, thus affecting the oil discharge and maintenance operations of other process equipment. Utility Model Content

[0003] In view of the defects of the existing technology, the purpose of this utility model is to provide a dehydration pressure buffer system for liquefied gas spherical tanks, which can reduce the entry of liquefied gas components into the oily sewage pipeline network, avoid pipeline overpressure, and prevent the impact on oil discharge maintenance of other equipment and the occurrence of secondary accidents.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a liquefied balloon tank dehydration pressure buffer system, comprising a liquefied balloon tank, a water cutter, and a dehydration buffer tank. The liquefied balloon tank is connected to the water cutter via a tank outlet pipeline. The bottom outlet of the water cutter is connected to an oily wastewater network via a water cutter drainage pipeline. An inlet pipeline of the dehydration buffer tank is connected to the water cutter drainage pipeline. The inlet pipeline of the dehydration buffer tank is connected to the inlet of the dehydration buffer tank. The bottom outlet of the dehydration buffer tank is connected to the oily wastewater network via a buffer tank drainage pipeline. The top outlet of the dehydration buffer tank is connected to a flare system via a buffer tank exhaust pipeline.

[0005] Furthermore, an isolation valve and a water cutter inlet valve are sequentially installed on the outlet pipeline of the spherical tank.

[0006] Furthermore, a level gauge is installed inside the water cutter.

[0007] Furthermore, a drain valve for the water cutter is installed on the drain pipeline of the water cutter.

[0008] Furthermore, the inlet pipeline of the dehydration buffer tank is connected upstream of the drain valve of the water cutter.

[0009] Furthermore, the drain valve of the water cutter is normally closed.

[0010] Furthermore, an inlet valve for the dehydration buffer tank is installed on the inlet pipeline of the buffer tank.

[0011] Furthermore, a buffer tank drain valve is installed on the buffer tank drain pipeline.

[0012] Furthermore, a flare system valve is installed on the exhaust pipeline of the buffer tank.

[0013] Furthermore, the flare system valve is normally open.

[0014] The beneficial effects of this utility model are as follows: The dehydration pressure buffer system of the liquefied gas cylinder of this utility model adds a buffer tank at the rear of the water cutter, which prevents the oily wastewater discharged by the water cutter from being directly discharged into the oily wastewater pipe network and causing pressure shock to the pipe network. The buffer tank can buffer and release the pressure, which facilitates the oil drainage and maintenance operations of other equipment and facilities. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the dehydration pressure buffer system for the liquefied balloon tank of this utility model;

[0016] In the diagram: 1. Buffer tank drain valve, 2. Dehydration buffer tank, 3. Flare system valve, 4. Buffer tank inlet valve, 5. Water cutter drain valve, 6. Water cutter level gauge, 7. Water cutter, 8. Water cutter inlet valve, 9. Isolation valve, 10. Liquefied gas spherical tank, 11. Spherical tank outlet pipeline, 12. Water cutter drain pipeline, 13. Oily wastewater pipeline network, 14. Dehydration buffer tank inlet pipeline, 15. Buffer tank drain pipeline, 16. Buffer tank vent pipeline. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0018] See appendix Figure 1A dehydration pressure buffer system for a liquefied gas spherical tank includes a liquefied gas spherical tank 10, a water cutter 7, and a dehydration buffer tank 2. The liquefied gas spherical tank 10 is connected to the water cutter 7 via a tank outlet pipeline 11. An isolation valve 9 and a water cutter inlet valve 8 are sequentially installed on the tank outlet pipeline 11. The water cutter 7 is equipped with a water cutter level gauge 6 for monitoring the liquid level inside the water cutter 7. The bottom outlet of the water cutter 7 is connected to an oily wastewater network 13 via a water cutter drain pipeline 12. A water cutter drain valve 5 is installed on the water cutter drain pipeline 12. The water cutter drain valve 5 is normally closed. A dehydration buffer is connected to the water cutter drain pipeline 12. The buffer tank inlet pipe 14 is connected upstream of the water cutter drain valve 5 and is connected to the inlet of the dehydration buffer tank 2. A buffer tank inlet valve 8 is installed on the dehydration buffer tank inlet pipe 14. The bottom outlet of the dehydration buffer tank 2 is connected to the oily wastewater network 13 through the buffer tank drain pipe 15. A buffer tank drain valve 1 is installed on the buffer tank drain pipe 15. The top outlet of the dehydration buffer tank 2 is connected to the flare system through the buffer tank exhaust pipe 16. A flare system valve 3 is installed on the buffer tank exhaust pipe 16. The flare system 3 is normally open.

[0019] Because liquefied petroleum gas (LPG) products contain light components that are highly vaporizable, they can easily cause a significant and sudden increase in pressure within the oily wastewater pipeline network, affecting the oil discharge and maintenance operations of other process equipment. To buffer and release this pressure and avoid impacting the oily wastewater pipeline network, a buffer tank 2 is added after the spherical tank water cutter 7. By increasing its volume, the immediate pressure increase is reduced, and the wastewater is gradually discharged into the flare system. Simultaneously, this allows the light components in the removed water to vaporize more thoroughly, greatly reducing the impact on the oily wastewater pipeline network and facilitating the oil discharge and maintenance operations of other equipment and facilities.

[0020] Operating Procedure: Keep the water cutter drain valve 5 normally closed and the flare system valve 3 normally open. First, open the water cutter inlet valve 8, then open the isolation valve 9 through the program. Water accumulated at the bottom of the liquefied gas cylinder 10 enters the water cutter 7. The operator observes the water cutter level gauge 6. When the level reaches 70-80%, open the buffer tank inlet valve 4 to allow the water to be removed to enter the dehydration buffer tank 2. When the water cutter level drops to 30-40%, open the buffer tank drain valve 1 to drain the water. In this way, the light components in the removed water vaporize and are released in the buffer tank, entering the flare network, greatly reducing the pressure impact on the oily wastewater network.

[0021] It should be noted that the parts of this utility model not described in detail are existing technologies.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] The above-listed embodiments are merely preferred embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments and many variations are possible. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A dehydration pressure buffer system for a liquefied gas spherical tank, characterized in that: The system includes a liquefied gas balloon tank, a water cutter, and a dehydration buffer tank. The liquefied gas balloon tank is connected to the water cutter via a tank outlet pipeline. The bottom outlet of the water cutter is connected to the oily wastewater network via a water cutter drainage pipeline. The water cutter drainage pipeline is connected to the dehydration buffer tank inlet pipeline, which is connected to the inlet of the dehydration buffer tank. The bottom outlet of the dehydration buffer tank is connected to the oily wastewater network via a buffer tank drainage pipeline. The top outlet of the dehydration buffer tank is connected to the flare system via a buffer tank exhaust pipeline.

2. The dehydration pressure buffer system for a liquefied gas spherical tank according to claim 1, characterized in that: An isolation valve and a water cutter inlet valve are sequentially installed on the outlet pipeline of the spherical tank.

3. The dehydration pressure buffer system for a liquefied gas spherical tank according to claim 1, characterized in that: The water cutter is equipped with a level gauge.

4. The dehydration pressure buffer system for a liquefied gas spherical tank according to claim 1, characterized in that: A drain valve is installed on the drain line of the water cutter.

5. The dehydration pressure buffer system for a liquefied gas spherical tank according to claim 4, characterized in that: The inlet pipeline of the dehydration buffer tank is connected upstream of the drain valve of the water cutter.

6. The dehydration pressure buffer system for a liquefied gas spherical tank according to claim 5, characterized in that: The drain valve of the water cutter is normally closed.

7. A dehydration pressure buffer system for a liquefied gas spherical tank according to claim 1 or 5, characterized in that: The dehydration buffer tank inlet pipeline is equipped with a buffer tank inlet valve.

8. The dehydration pressure buffer system for a liquefied gas spherical tank according to claim 1, characterized in that: A buffer tank drain valve is installed on the drain pipeline of the buffer tank.

9. The dehydration pressure buffer system for a liquefied gas spherical tank according to claim 1, characterized in that: A flare system valve is installed on the exhaust pipeline of the buffer tank.

10. A dehydration pressure buffer system for a liquefied gas spherical tank according to claim 9, characterized in that: The flare system valve is normally open.

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