CN219063071U

CN219063071U - Low-pressure wet type single-section vertical-lift gas holder roof-falling prevention device for combustible gas storage

Info

Publication number: CN219063071U
Application number: CN202223247803.6U
Authority: CN
Inventors: 李亚文; 周建华; 董尚志; 王进龙; 朱琴; 窦宝文; 高亮
Original assignee: Jinchuan Group Co Ltd
Current assignee: Jinchuan Group Co Ltd
Priority date: 2022-12-05
Filing date: 2022-12-05
Publication date: 2023-05-23
Anticipated expiration: 2032-12-05

Abstract

The utility model discloses a low-pressure wet type single-section vertical lifting gas holder roof-falling prevention device for combustible gas storage, which comprises a manual blow-down pipe and two automatic blow-down pipes, wherein the manual blow-down pipe and the two automatic blow-down pipes are vertically fixed at the top of a bell jar, and the lower end of the manual blow-down pipe is communicated with the inner cavity of the gas holder; the lower end of the automatic blow-down pipe extends into the gas holder and has a vertical distance of not less than 1 meter from the lower edge of the bell jar, and the vertical distance of the upper end of the automatic blow-down pipe exceeding the top of the gas holder is not less than 3 meters; the two automatic blow-down pipes are respectively provided with a pipeline flame arrester at the upper position of the gas holder. When the gas holder runs to the highest point, gas is discharged through the pipeline flame arresters on the two automatic blow-down pipes, so that the phenomenon of gas holder roof falling caused by over-high gas holder is prevented; the pipeline flame arrester can safely discharge combustible gas, prevent explosion accidents, and greatly improve safety.

Description

Low-pressure wet type single-section vertical-lift gas holder roof-falling prevention device for combustible gas storage

Technical Field

The utility model belongs to the technical field of petrochemical production, and particularly relates to a low-pressure wet type single-section vertical lift gas holder roof-falling prevention device for combustible gas storage.

Background

In the current petrochemical production process, the gas is buffered in the storage and continuous production processes of combustible gas, and most of the gas is a low-pressure wet single-section helicopter gas holder process, and the main structure of the gas holder consists of a vertical cylindrical water tank, a cylinder bell jar, a gas inlet and outlet pipeline and a guiding and positioning device. The bell is a cylindrical structure that is open from the bottom surface of the dome. A gas holder lifting guide device is arranged between a gas holder cylinder body and a bell jar, guide rails are uniformly arranged along the periphery inside the gas holder cylinder body, pulleys are uniformly arranged along the periphery of the gas holder bell jar, and the cylinder guide rails are matched with the bell jar pulleys to realize uniform lifting of the gas holder. In the normal production operation process, industrial water is filled in the gas holder cylinder to form a water seal, a gas pipeline penetrates through the water tank bottom plate and water in the water tank to enter the bell jar, gas is input or discharged, and the gas holder shows a lifting state trend through the liquid level meter.

When the gas is pumped into the gas holder, the bell cover rises, and the hanging ring at the lower part of the bell cover takes water from the water tank; the bell is raised to a certain height along the track. When outputting gas, the bell jar descends along the track, so that the gas is stored and buffered. The bell jar and the tower section rely on the guide rail and the guide wheel to ensure stable lifting.

In the actual operation process, particularly in the continuous production process operation process, the gas holder is a continuous production line buffer function, and under the condition of the occurrence of sudden stop of a fault and the interlocking failure of a gas holder high report after the gas holder, the gas holder roof falling condition caused by the too high gas holder easily occurs, so that the gas holder bell roof falling, the track derailment, a large amount of combustible gas leakage and the occurrence of ignition explosion accidents easily occur when the gas holder is exposed.

Disclosure of Invention

The utility model provides a low-pressure wet type single-section vertical lift gas holder anti-roof-falling device for combustible gas storage, and aims to solve the problem that the gas holder is prone to roof-falling caused by too high gas holder under the condition that a compressor fails to stop suddenly and the gas holder is in high-pressure interlocking failure after the gas holder.

Therefore, the utility model adopts the following technical scheme:

the device comprises a manual blow-down pipe and two automatic blow-down pipes which are vertically fixed at the top of a bell jar, wherein the lower end of the manual blow-down pipe is communicated with the inner cavity of the gas holder; the lower end of the automatic blow-down pipe extends into the gas holder and has a vertical distance of not less than 1 meter from the lower edge of the bell jar, and the vertical distance of the upper end of the automatic blow-down pipe exceeding the top of the gas holder is not less than 3 meters; the two automatic blow-down pipes are respectively provided with a pipeline flame arrester at the upper position of the gas holder.

Further, the air inlet and outlet pipeline enters from the bottom of the cabinet body cylinder, and the outlet of the air inlet and outlet pipeline is at least 0.5 m higher than the highest water level of the cabinet body cylinder.

Further, the periphery of the gas holder cylinder body is provided with a guide rail guide frame, and the gas holder cylinder body further comprises an upper pulley and a lower pulley in the gas holder cylinder body.

Further, the gas holder cylinder is also connected with a water supplementing pipeline and an overflow port.

Further, a heat tracing pipe is arranged in the water replenishing pipe of the gas holder cylinder.

The gas holder barrel track and the bell jar pulley must be matched, no clamping is caused in the lifting process, the gas holder derailment operation phenomenon occurs in the gas holder lifting process, the gas holder barrel and the bottom plate must be strictly sealed, and leakage is strictly forbidden.

The gas holder cylinder body water supplementing pipeline and the gas holder cylinder body are internally provided with heat tracing pipes so as to prevent freezing phenomenon caused by low winter temperature.

Industrial waterproof lubricating grease must be used for the gas holder pulley, so that the phenomenon that the guide rail and the pulley block and are blocked in the lifting process of the gas holder is prevented. All flange connectors of the gas holder are bridged by using electrostatic jumpers, and the gas holder cylinder body is grounded.

The utility model has the beneficial effects that:

when the gas holder runs to the highest point, gas is discharged through the pipeline flame arresters on the two automatic blow-down pipes, so that the phenomenon of gas holder roof falling caused by over-high gas holder is prevented; the pipeline flame arrester can safely discharge combustible gas, prevent explosion accidents, and greatly improve safety.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

in the figure: 1-a gas holder cylinder; 2-a bell jar; 3-automatically emptying the pipe; 4-a guide rail guide frame; 5-upper pulleys; 6-a lower pulley; 7-a pipe bracket; 8-an air inlet and outlet pipeline; 9-a water supplementing pipeline; 10-overflow port; 11-manual blow-down; 12-pipe flame arresters.

Detailed Description

The utility model is further described below with reference to the accompanying drawings:

as shown in fig. 1, the low-pressure wet single-section vertical lift gas holder anti-roof device for storing combustible gas comprises a guide rail guide frame 4 arranged around a gas holder cylinder body 1, a cylinder-shaped bell jar 2, an upper pulley 5 and a lower pulley 6 arranged in the gas holder cylinder body 1, wherein the guide rail guide frame 4, the upper pulley 5 and the lower pulley 6 move according to relative tracks. An automatic blow-down pipe 3 and a manual blow-down pipe 11 are welded on the top opening of the bell jar 2, and a pipeline flame arrester 12 is arranged on the automatic blow-down pipe 3. The lower end of the automatic blow-down pipe 3 extends into the gas holder and has a vertical distance of not less than 1 meter with the lower edge of the bell jar 2, and the vertical distance of the upper end of the automatic blow-down pipe 3 exceeding the top of the gas holder is not less than 3 meters.

The air inlet and outlet pipeline 8 is installed through the opening of the wall plate of the gas holder cylinder 1, and is lifted to the highest position of the gas holder cylinder 1 by more than 0.5 meter, and the pipeline bracket 7 is manufactured on the bottom plate of the gas holder cylinder 1 for pipeline fixation. The water supplementing pipeline 9 of the gas holder barrel 1 is arranged to facilitate the water supplementing of the gas holder, and the water overflow port 10 of the gas holder barrel 1 is arranged at the position right opposite to the water supplementing pipeline 9.

The top of the gas holder is provided with a hole, a manual blow-down pipe 11 of the gas holder is welded and installed, and a double-valve control is arranged on the pipeline.

The application process of the utility model is as follows:

1. the gas holder and all pipeline pipe fittings are pressed for leakage test, the pressure is 20kpa, metal winding gaskets are used at the pipeline flange connection positions, and the whole system is replaced, so that the oxygen content is required to be less than or equal to 0.2 percent.

2. And (3) opening a valve of a water supplementing pipeline 9 of the gas holder barrel 1, adding water to the gas holder, and stopping supplementing water when water flows out from an overflow port 10 of the gas holder barrel 1 after water adding operation, wherein the sedimentation detection of the gas holder is required in the water supplementing process.

3. And the valve of the manual blow-down pipe 11 is closed, nitrogen is introduced into the air inlet and outlet pipeline 8, the gas holder bell 2 starts to slowly ascend, and meanwhile, the relative running condition of the gas holder guide rail frame 4, the upper pulley 5 and the lower pulley 6 is checked, so that the ascending running stability of the gas holder is ensured.

4. It is checked whether the automatic blow-down pipe 3 is lifted simultaneously with the gas holder bell 2, and when the gas holder is lifted to the highest liquid level, the gas in the gas holder is evacuated from the automatic blow-down pipe 3 through the pipe flame arrester 12, and the gas holder stops lifting at the same time.

Claims

1. The low-pressure wet single-section vertical lifting gas holder anti-roof device for storing combustible gas is characterized by comprising a manual blow-down pipe (11) and two automatic blow-down pipes (3), wherein the manual blow-down pipe (11) is vertically fixed at the top of a bell jar (2), and the lower end of the manual blow-down pipe (11) is communicated with the inner cavity of a gas holder cylinder (1); the lower end of the automatic blow-down pipe (3) extends into the gas holder barrel (1) and has a vertical distance of not less than 1 meter with the lower edge of the bell jar (2), and the vertical distance of the upper end of the automatic blow-down pipe (3) beyond the top of the gas holder barrel (1) is not less than 3 meters; two automatic blow-down pipes (3) are respectively provided with a pipeline flame arrester (12) at the upper position of the gas holder cylinder body (1).

2. The low-pressure wet single-section vertical-lift gas holder roof-falling prevention device for combustible gas storage according to claim 1, further comprising a gas inlet and outlet pipeline (8), wherein the gas inlet and outlet pipeline (8) enters from the bottom of the holder body cylinder, and the outlet of the gas inlet and outlet pipeline (8) is at least 0.5 m higher than the highest water level of the holder body cylinder.

3. The low-pressure wet type single-section vertical lift gas holder anti-roof device for the storage of combustible gas according to claim 1, wherein guide rail guide frames (4) are arranged around the gas holder cylinder (1), and the device further comprises an upper pulley (5) and a lower pulley (6) in the gas holder cylinder (1).

4. The low-pressure wet type single-section vertical lift gas holder roof-falling prevention device for combustible gas storage according to claim 3, wherein a water supplementing pipeline (9) and an overflow port (10) are further connected to the gas holder cylinder (1).

5. The low-pressure wet type single-section vertical lift gas holder roof-falling prevention device for the combustible gas storage according to claim 4, wherein a water supplementing pipe (9) of the gas holder cylinder (1) and a heat tracing pipe are arranged in the gas holder cylinder (1).