CN211896484U

CN211896484U - Liquefied gas dehydrator

Info

Publication number: CN211896484U
Application number: CN202020225736.XU
Authority: CN
Inventors: 张立云; 冯亚楠
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-11-10
Anticipated expiration: 2030-02-28

Abstract

The utility model discloses a liquefied gas dehydrator, which comprises a gas-liquid buffer tank, a liquid inlet pipe, a drain pipe and an exhaust pipe; a flow regulating valve, a filter and a first cut-off valve are sequentially arranged on the liquid inlet pipe from the joint of the liquid inlet pipe and the gas-liquid buffer tank, a drain control valve and a second cut-off valve are sequentially arranged on the drain pipe from the joint of the drain pipe and the gas-liquid buffer tank, and a check valve and a third cut-off valve are sequentially arranged on the exhaust pipe from the joint of the exhaust pipe and the gas-liquid buffer tank; a heating device is arranged at the lower part inside the gas-liquid buffer tank; the inside upper portion of gas-liquid buffer tank is equipped with the defogging device, reduces VOC's emission, reduces intensity of labour, improves the operation safety, reduces the occupational health injury to taking off liquid operating personnel, reaches the purpose of atmospheric protection to further be favorable to human health. Has high commercial value and popularization value.

Description

Liquefied gas dehydrator

Technical Field

The utility model relates to industrial equipment, in particular to a liquefied gas dehydrator.

Background

VOC (volatile organic compound) emissions are one of the important sources of air pollution. In the industries of petroleum, chemical industry and the like which relate to combustible, toxic and other liquefied gases, process equipment and storage equipment are usually dehydrated for production, use and storage, during dehydration, water is directly discharged from the equipment to a sewage collecting system, and a large amount of liquefied gas is entrained or dissolved to be gasified and discharged into the atmosphere while the water is discharged, so that atmospheric pollution is caused.

In the past decades of toxic and flammable liquefied gas dehydration technology development, mostly discharged liquid is introduced into a closed system to recover gasified gas so as to reduce air pollution and flash explosion risks caused by gas emission to the atmosphere, but during operation, the operation is basically manual operation, and the node of dehydration completion is judged by human visual inspection. The method is not easy to control the discharge amount of the discharged liquid, the dehydration effect cannot be ensured, especially for the liquefied gas with high solubility in water, a large amount of liquefied gas is dissolved in the discharged liquid, if the dehydration of water is ensured, a large amount of liquefied gas is carried out, on one hand, greater pollution is caused, and on the other hand, the loss of high-value materials is caused.

Therefore, a dehydrator for liquefied gas, which is simple and convenient to operate, safe and reliable and can greatly reduce the emission of VOC, is urgently needed to be researched.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to overcome the defects of the technology and provide a liquefied gas dehydrator.

In order to solve the technical problem, the utility model provides a technical scheme is a liquefied gas dehydrator: comprises a gas-liquid buffer tank, a liquid inlet pipe, a drain pipe and an exhaust pipe; one end of the liquid inlet pipe is connected and communicated with the middle part of the gas-liquid buffer tank, one end of the water outlet pipe is connected and communicated with the lower end of the gas-liquid buffer tank, and one end of the gas outlet pipe is connected and communicated with the upper end of the gas-liquid buffer tank;

a flow regulating valve, a filter and a first cut-off valve are sequentially arranged on the liquid inlet pipe from the joint of the liquid inlet pipe and the gas-liquid buffer tank, a drain control valve and a second cut-off valve are sequentially arranged on the drain pipe from the joint of the drain pipe and the gas-liquid buffer tank, and a check valve and a third cut-off valve are sequentially arranged on the exhaust pipe from the joint of the exhaust pipe and the gas-liquid buffer tank;

a heating device is arranged at the lower part inside the gas-liquid buffer tank;

a defogging device is arranged at the upper part inside the gas-liquid buffer tank, and gas inside the gas-liquid buffer tank can enter the exhaust pipe after passing through the defogging device;

the liquid level meter is arranged on the gas-liquid buffer tank, the thermometer is arranged on the gas-liquid buffer tank, and the pressure meter is arranged at the upper end of the gas-liquid buffer tank.

As an improvement, the heating device is an electric heater, the heating device is composed of a heating copper pipe and a control device, the heating copper pipe is connected with the control device, the heating copper pipe is located inside the gas-liquid buffer tank, and the control device is located outside the gas-liquid buffer tank.

As an improvement, the demisting device is a folded plate type demister or a demisting net.

Compared with the prior art, the utility model the advantage lie in: the discharge of VOC is reduced, the labor intensity is reduced, the operation safety is improved, the occupational health injury to the liquid removal operators is reduced, the purpose of protecting the atmosphere is achieved, and the human health is further facilitated. Has high commercial value and popularization value.

Drawings

Fig. 1 is a schematic diagram of a first structure of a liquefied gas dehydrator according to the present invention.

Fig. 2 is a side view of the liquefied gas dehydrator of the present invention.

Fig. 3 is a front view of the liquefied gas dehydrator of the present invention.

Fig. 4 is a cross-sectional view taken at a-a in fig. 3.

Fig. 5 is a second schematic diagram of the liquefied gas dehydrator of the present invention.

Fig. 6 is a schematic diagram of a third structure of the liquefied gas dehydrator of the present invention.

As shown in the figure: 1. the device comprises a gas-liquid buffer tank, 2, a liquid inlet pipe, 3, a water outlet pipe, 4, an exhaust pipe, 5, a flow regulating valve, 6, a filter, 7, a first cut-off valve, 8, a water outlet control valve, 9, a second cut-off valve, 10, a one-way valve, 11, a third cut-off valve, 12, a heating device, 13, a defogging device, 14, a liquid level meter, 15, a thermometer, 16, a pressure gauge, 17, a heating copper pipe, 18 and a control device.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

With reference to the attached figures 1-6, a liquefied gas dehydrator comprises a gas-liquid buffer tank 1, a liquid inlet pipe 2, a water outlet pipe 3 and an exhaust pipe 4; one end of the liquid inlet pipe 2 is connected and communicated with the middle part of the gas-liquid buffer tank 1, one end of the water outlet pipe 3 is connected and communicated with the lower end of the gas-liquid buffer tank 1, and one end of the gas outlet pipe 4 is connected and communicated with the upper end of the gas-liquid buffer tank 1;

a flow regulating valve 5, a filter 6 and a first cut-off valve 7 are sequentially arranged on the liquid inlet pipe 2 from the connection part of the liquid inlet pipe 2 and the gas-liquid buffer tank 1, a water discharge control valve 8 and a second cut-off valve 9 are sequentially arranged on the water discharge pipe 3 from the connection part of the water discharge pipe 3 and the gas-liquid buffer tank 1, and a one-way valve 10 and a third cut-off valve 11 are sequentially arranged on the gas discharge pipe 4 from the connection part of the gas discharge pipe 4 and the gas-liquid buffer tank 1;

the filter is an indispensable device on the medium conveying pipeline, and after water to be treated passes through the filter, impurities are blocked, so that the filter is very convenient to use and maintain.

A heating device 12 is arranged at the lower part of the interior of the gas-liquid buffer tank 1;

a defogging device 13 is arranged at the upper part inside the gas-liquid buffer tank 1, and gas inside the gas-liquid buffer tank 1 can enter the exhaust pipe 4 after passing through the defogging device 13;

the liquid level meter 14 is arranged on the gas-liquid buffer tank 1, the thermometer 15 is arranged on the gas-liquid buffer tank 1, and the pressure gauge 16 is arranged at the upper end of the gas-liquid buffer tank 1.

The heating device 12 is an electric heater, the heating device 12 is composed of a heating copper pipe 17 and a control device 18, the heating copper pipe is protected by a corrosion-resistant sleeve, a heating medium of the heating device also comprises steam and hot water, the heating copper pipe 17 is connected with the control device 18, the heating copper pipe 17 is positioned inside the gas-liquid buffer tank 1, and the control device 18 is positioned outside the gas-liquid buffer tank 1.

The demisting device 13 is a folded plate type demister or a demisting net.

The utility model discloses when concrete implementation, the exhaust water that contains liquefied gas of process units gets into feed liquor pipe 2, through filter 6's filtration back, then enters into gas-liquid buffer tank 1 through flow control valve 6. The water containing liquefied gas in the gas-liquid buffer tank 1 is heated by the heating device 12 and gasified, the gasified liquefied gas is subjected to liquid removal by the demister 13 at the top of the gas-liquid buffer tank 1, and the gas meeting the discharge requirement is discharged from the top exhaust pipe 4. The gas in the exhaust pipe 4, which meets the emission requirements, is discharged to a gas recovery system or a specified system after passing through the check valve 10 and the third shut-off valve 11. The check valve 10 prevents gas in the gas recovery system or a designated system from entering the gas-liquid buffer tank 1. When not in use, the third shut-off valve 11 needs to be closed, and when the liquefied gas needs to be dehydrated, the third shut-off valve 11 needs to be opened.

The water which is gasified to remove the liquefied gas and is removed by the demisting device 13 enters the drain pipe 3 together, and the discharged water is discharged under the control of the drain control valve 8, so that gas penetration during water discharge is avoided. The water is discharged to a designated place after passing through the drain control valve 8 and the second shut-off valve 9 in sequence. The rate of water flow is controlled by drain control valve 8 and second shut-off valve 9 has the effect of opening and shutting off drain pipe 3.

The gas-liquid buffer tank 1 is provided with a liquid level meter 14, a thermometer 15, and a pressure gauge 16, and has a function of monitoring the inside of the gas-liquid buffer tank 1.

The flow rate control valve 5, the first shut-off valve 7, the drain control valve 8, the second shut-off valve 9, the third shut-off valve 11, the heating device 12, and the defogging device 13 may be operated manually or automatically.

The invention can effectively improve the dehydration efficiency, reduce the discharge of VOC, reduce the labor intensity, improve the operation safety, reduce the occupational health injury to the liquid removal operators, achieve the purpose of protecting the atmosphere and further contribute to the health of human bodies. Has high commercial value and popularization value.

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims

1. A liquefied gas dehydrator, comprising: comprises a gas-liquid buffer tank (1), a liquid inlet pipe (2), a water outlet pipe (3) and an exhaust pipe (4); one end of the liquid inlet pipe (2) is connected and communicated with the middle part of the gas-liquid buffer tank (1), one end of the water outlet pipe (3) is connected and communicated with the lower end of the gas-liquid buffer tank (1), and one end of the gas outlet pipe (4) is connected and communicated with the upper end of the gas-liquid buffer tank (1);

a flow regulating valve (5), a filter (6) and a first cut-off valve (7) are sequentially arranged on the liquid inlet pipe (2) from the connection position of the liquid inlet pipe (2) and the gas-liquid buffer tank (1), a water discharge control valve (8) and a second cut-off valve (9) are sequentially arranged on the water discharge pipe (3) from the connection position of the water discharge pipe (3) and the gas-liquid buffer tank (1), and a check valve (10) and a third cut-off valve (11) are sequentially arranged on the exhaust pipe (4) from the connection position of the exhaust pipe (4) and the gas-liquid buffer tank (1);

a heating device (12) is arranged at the lower part of the interior of the gas-liquid buffer tank (1);

a demisting device (13) is arranged at the upper part in the gas-liquid buffer tank (1), and gas in the gas-liquid buffer tank (1) can enter the exhaust pipe (4) after passing through the demisting device (13);

the liquid level meter (14) is arranged on the gas-liquid buffer tank (1), the thermometer (15) is arranged on the gas-liquid buffer tank (1), and the pressure gauge (16) is arranged at the upper end of the gas-liquid buffer tank (1).

2. The liquefied gas dehydrator of claim 1, wherein: the heating device (12) is an electric heater, the heating device (12) is composed of a heating copper pipe (17) and a control device (18), the heating copper pipe (17) is connected with the control device (18), the heating copper pipe (17) is located inside the gas-liquid buffer tank (1), and the control device (18) is located outside the gas-liquid buffer tank (1).

3. The liquefied gas dehydrator of claim 1, wherein: the demisting device (13) is a folded plate type demister or a demisting net.