CN210979330U

CN210979330U - Nitrogen protection device in L NG gasification CNG technology

Info

Publication number: CN210979330U
Application number: CN201921960605.XU
Authority: CN
Inventors: 孙凯; 闫东雷
Original assignee: Beijing Huanyu Jinghui City Gas Technology Co ltd
Current assignee: Beijing Huanyu Jinghui City Gas Technology Co ltd
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2020-07-10
Anticipated expiration: 2029-11-14

Abstract

The utility model discloses a nitrogen protection device in L NG gasification CNG technology relates to chemical production technical field, including nitrogen gas cylinder, nitrogen gas cylinder's top intercommunication has the dress hose that fills, the top of filling the dress hose is connected with the nitrogen gas busbar, the one end of nitrogen gas busbar is connected with the protection solenoid valve, and the one end of nitrogen gas busbar is parallelly connected with the both ends of protection solenoid valve, be connected with the pipeline behind the nitrogen gas busbar connection protection solenoid valve, the one end intercommunication of protection solenoid valve has urgent trip valve, the other end and the external unloading of protection solenoid valve, nitrogen protection device in this L NG gasification CNG technology can be the very first time with protection nitrogen gas flush the pipeline, prevents that the accident from expanding, can play the protection to the equipment in the pipeline very first time simultaneously about, will arrive minimumly with the accident loss.

Description

Nitrogen protection device in L NG gasification CNG technology

Technical Field

The utility model relates to a chemical production technical field, more specifically say, a nitrogen protection device in chemical pipeline.

Background

At present, in the process of gasifying CNG from L NG, only safety devices such as safety valves and emergency cut-off valves are arranged in the aspect of safety design, and when fire happens to devices such as a cryogenic pump and a vaporization device in actual production operation, the emergency cut-off valves are closed to prevent the L NG from reentering a pipeline to further enlarge the accident, but a certain amount of CNG is stored in the pipeline of the devices such as the cryogenic pump and the vaporizer, and although the L NG does not reenter the pipeline, the CNG remained in the devices can still be combusted to cause great loss to equipment and facilities.

Aiming at the defects of the prior production technology, the device not only can cut off the L NG gas source in time to prevent further expansion of accidents when a pipeline of the L NG gasified CNG device is in fire, but also can effectively protect the production device and minimize the loss.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pair of multi-functional graphics primitive is used in mathematics teaching to solve the problem that proposes among the above-mentioned background art.

The utility model provides a nitrogen protection device in L NG gasification CNG technology, including the nitrogen gas cylinder, the top intercommunication of nitrogen gas cylinder has the dress to fill the dress hose, the top that fills the dress hose is connected with the nitrogen gas busbar, the one end of nitrogen gas busbar is connected with the protection solenoid valve, and the one end of nitrogen gas busbar is parallelly connected with the both ends of protection solenoid valve, be connected with the pipeline behind the nitrogen gas busbar connection protection solenoid valve, the one end intercommunication of protection solenoid valve has the quick action emergency valve, the other end and the external unloading of protection solenoid valve.

Furthermore, the number of the nitrogen gas cylinders is 6, and the number of the filling hoses is 6.

Through adopting above-mentioned technical scheme, can enter into the pipeline through the protection solenoid valve fully effectual with the nitrogen gas source to further fill nitrogen protection to the pipeline.

Furthermore, one end of the pipeline is connected with an electric heating type gasifier, one end of the electric heating type gasifier is connected with an air bath type gasifier, and one end of the air bath type gasifier is provided with a CNG long pipe trailer.

Through adopting above-mentioned technical scheme, can effectually make in the pipeline effectual gasifying to make L NG can gasify.

Further, the other end of pipeline is connected with the cryopump, the one end of cryopump is connected with the emergency cut-off valve, the one end of emergency cut-off valve is connected with L NG storage tank.

By adopting the technical scheme, the pipeline is effectively cooled, and the gasified L NG is stored.

The utility model discloses a nitrogen protection device in L NG gasification CNG technology has following beneficial effect, the utility model discloses when the conflagration accident takes place, can rush into the pipeline with protection nitrogen gas the very first time, prevent that the accident from expanding, can play the protection to the equipment in the pipeline very first time simultaneously about, will arrive the minimum with the accident loss.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure, 1, a nitrogen gas bottle, 2, a filling hose, 3, a nitrogen gas bus bar, 4, an electric heating type gasifier, 5, an air bath type gasifier, 6, a CNG long pipe trailer, 7, L NG storage tanks, 8, an emergency cut-off valve, 9, a cryogenic pump, 10, a protective electromagnetic valve and 11, pipelines are arranged.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the utility model provides a technical scheme, in the utility model discloses a nitrogen protection device in L NG gasification CNG technology, nitrogen protection device comprises nitrogen gas busbar 3,

fill dress hose

2, 6 nitrogen gas cylinders 1, protection solenoid valve 10 etc. be connected nitrogen gas cylinder 1 through filling dress hose 2 and nitrogen gas busbar 3, nitrogen gas busbar 3 communicates with whole pipeline 11 after connecting protection solenoid valve 10, protection solenoid valve 10 and emergency cut-off valve 8 intercommunication are interactive on the control tube, after the incident that catches fire appears in pipeline 11, emergency cut-off valve 8 interlocks and closes in the same period protection solenoid valve 10 and opens, send into pipeline 11 with nitrogen gas, fill nitrogen protection to whole pipeline 11.

During the use, at first all be connected CNG long-tube trailer 6 with nitrogen gas busbar 3 through filling hose 2, being connected with protection solenoid valve 10 through nitrogen gas busbar 3, after nitrogen gas busbar 3 is connected with protection solenoid valve 10, wherein one end of nitrogen gas busbar 3 is parallelly connected with protection solenoid valve 10's both ends, communicating protection solenoid valve 10 with pipeline 11, wherein one end of protection solenoid valve 10 can be emptied with the outside, wherein protection solenoid valve 10 and 8 intercommunication interdynamic of emergency cut-off valve on the control duct, after the incident of catching fire appears in the pipeline, 8 interlocking of emergency cut-off valve close in the same term nitrogen gas protection solenoid valve open, send into pipeline 11 with nitrogen gas, can fill nitrogen protection to whole pipeline 11.

Claims

1. The nitrogen protection device in the L NG CNG gasification process comprises a nitrogen gas cylinder (1) and is characterized in that the top end of the nitrogen gas cylinder (1) is communicated with a filling hose (2), the top end of the filling hose (2) is connected with a nitrogen busbar (3), one end of the nitrogen busbar (3) is connected with a protection electromagnetic valve (10), one end of the nitrogen busbar (3) is connected with two ends of the protection electromagnetic valve (10) in parallel, a pipeline (11) is connected behind the nitrogen busbar (3) which is connected with the protection electromagnetic valve (10), one end of the protection electromagnetic valve (10) is communicated with an emergency cut-off valve (8), and the other end of the protection electromagnetic valve (10) is emptied from the outside.

2. The nitrogen protection device in the L NG gasified CNG process according to claim 1, wherein the number of the nitrogen cylinders (1) is 6, and the number of the filling hoses (2) is 6.

3. The nitrogen protection device in the process of L NG gasifying CNG according to claim 1, wherein one end of the pipeline (11) is connected with an electric heating type gasifier (4), and one end of the electric heating type gasifier (4) is connected with an air bath type gasifier (5).

4. The nitrogen protection device in the process of L NG gasification of CNG according to claim 3, wherein one end of the air bath type gasifier (5) is provided with a CNG long pipe trailer (6).

5. A nitrogen protection device in an L NG gasification CNG process according to claim 1, wherein the other end of the pipeline (11) is connected with a cryogenic pump (9), and one end of the cryogenic pump (9) is connected with an emergency cut-off valve (8).

6. The nitrogen protection device in the L NG gasified CNG process according to claim 1, wherein one end of the emergency cut-off valve (8) is connected with a L NG storage tank (7).