CN219177454U

CN219177454U - Cutting device convenient to overhauls of LNG gasification station air temperature formula vaporizer

Info

Publication number: CN219177454U
Application number: CN202320251824.0U
Authority: CN
Inventors: 尹雷明; 张华�; 孙亮亮; 侯泽华
Original assignee: Shanghai Energy Construction Group Co ltd
Current assignee: Shanghai Energy Construction Group Co ltd
Priority date: 2023-02-20
Filing date: 2023-02-20
Publication date: 2023-06-13
Anticipated expiration: 2033-02-20

Abstract

The utility model discloses a cutting device for facilitating overhauling of an air-temperature type vaporizer of an LNG (liquefied natural gas) gasification station, which comprises two air-temperature type vaporizers, wherein liquid inlets of the two air-temperature type vaporizers are respectively connected with liquid inlet branch pipes, gate valves are respectively arranged on the two liquid inlet branch pipes, liquid outlets of the two air-temperature type vaporizers are respectively connected with liquid outlet branch pipes, valve cutting devices are respectively arranged on the two liquid outlet branch pipes, and one ends of the two liquid outlet branch pipes far away from the air-temperature type vaporizer are intersected; further, when one air temperature type gasifier goes out of a problem, the LNG flows back from the liquid outlet of the other air temperature type gasifier, so that the safety risk coefficient of the air temperature type gasifier during maintenance is reduced.

Description

Cutting device convenient to overhauls of LNG gasification station air temperature formula vaporizer

Technical Field

The utility model relates to the technical field of fuel gas, in particular to a device convenient for overhauling an LNG gasification station.

Background

In the prior art, LNG is transported to an LNG gasification station from an automobile tank car, and LNG in the tank car is unloaded into an LNG storage tank by using an unloading booster. LNG in the storage tank is pressurized by the storage tank pressurizing gasifier and then is conveyed to the air temperature gasifier, gasified by the air temperature gasifier, filtered, pressure-regulated, metered and odorized and then conveyed to the medium-pressure pipe network.

Generally, each air temperature type gasifier is provided with 1 stainless steel low-temperature gate valve control valve at a liquid inlet port, and a liquid outlet port is connected with a stainless steel pipeline flange. For example, in some embodiments, 5000Nm3/h air-temperature type gasifiers are directly connected and converged with 2000Nm3/h air-temperature type gasifiers at the liquid outlet end of each two air-temperature type gasifiers, and the air-temperature type gasifiers are directly output.

As shown in fig. 1, in the prior art, the liquid outlet end pipelines of two air-temperature gasifiers are directly connected and converged together for output. Because of the low temperature characteristic of LNG, and the defects of various companies in the aspects of design, selection, foundation construction, personnel operation and the like of the gasifier, the air temperature type gasifier has more problems in the operation process, once one air temperature type gasifier has problems and needs urgent repair, the gate valve of the liquid inlet of the air temperature type gasifier is closed, but the outlet of the gate valve is connected with the other air temperature type gasifier, and the LNG flows back into the air temperature type gasifier with the problems from the liquid outlet, so that the normal supply of the gas service is not carried out, and even the safety production accident occurs.

Therefore, those skilled in the art have been working to develop a cutting device for facilitating maintenance of an air temperature type vaporizer of an LNG vaporization station to realize normal supply of a fuel gas service while reducing the risk of occurrence of a safety production accident.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present utility model aims to provide a cutting device for facilitating maintenance of an air-temperature vaporizer of an LNG gasification station, which solves the problem in the prior art that in two air-temperature vaporizers, when one of them needs urgent repair, the other air-temperature vaporizer will cause LNG to flow back from a liquid outlet into the air-temperature vaporizer with the problem of the air-temperature vaporizer, so that normal supply of natural gas service is not possible and even safety production accidents occur.

In order to achieve the technical aim, the utility model provides a cutting device for facilitating overhauling of an air-temperature vaporizer of an LNG (liquefied Natural gas) gasification station, which comprises two air-temperature vaporizers, wherein liquid inlets of the two air-temperature vaporizers are respectively connected with liquid inlet branch pipes, gate valves are respectively arranged on the two liquid inlet branch pipes, liquid outlets of the two air-temperature vaporizers are respectively connected with liquid outlet branch pipes, valve cutting devices are respectively arranged on the two liquid outlet branch pipes, and one ends of the two liquid outlet branch pipes, which are far away from the air-temperature vaporizer, are intersected.

Preferably, one end of each of the two liquid inlet branch pipes, which is far away from the air-temperature gasifier, is respectively communicated with a liquid inlet main pipe for realizing liquid inlet.

Preferably, the junction of the two liquid outlet branch pipes is communicated with a liquid outlet main pipe for realizing liquid outlet.

The utility model has the beneficial effects that:

due to the structural design, when one of the air-temperature type gasifiers has a problem, the other air-temperature type gasifiers can normally operate, and can normally supply gas service for urban areas; further, when one air temperature type gasifier goes out of a problem, the LNG flows back from the liquid outlet of the other air temperature type gasifier, so that the safety risk coefficient of the air temperature type gasifier during maintenance is reduced.

Drawings

FIG. 1 is a schematic diagram of a prior art structure;

fig. 2 is a schematic structural view of the present utility model.

In the figure: the device comprises a first air temperature type gasifier, a second air temperature type gasifier, a first liquid inlet branch pipe 3, a second liquid inlet branch pipe 4, a first gate valve 5, a second gate valve 6, a main liquid inlet pipe 7, a first liquid outlet branch pipe 8, a second liquid outlet branch pipe 9, a first valve cutting device 10, a second valve cutting device 11 and a main liquid outlet pipe 12.

Detailed Description

The conception, specific structure, and technical effects of the present utility model will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present utility model.

Examples:

as shown in fig. 2, the cutting device for facilitating overhauling of the air temperature type vaporizer of the LNG vaporizing station comprises two air temperature type vaporizers, namely a first air temperature type vaporizer 1 and a second air temperature type vaporizer 2.

The liquid inlets of the two air temperature gasifiers are respectively connected with liquid inlet branch pipes, namely a first liquid inlet branch pipe 3 and a second liquid inlet branch pipe 4.

Gate valves are respectively arranged on the two liquid inlet branch pipes, namely a first gate valve 5 and a second gate valve 6.

The liquid outlets of the two air temperature gasifiers are respectively connected with a liquid outlet branch pipe, namely a first liquid outlet branch pipe 8 and a second liquid outlet branch pipe 9; the first liquid outlet branch pipe 8 and the second liquid outlet branch pipe 9 are respectively provided with a valve cutting device, namely a first valve cutting device 10 and a second valve cutting device 11; the first outlet branch pipe 8 and the second outlet branch pipe 9 meet at the end far away from the air temperature type gasifier, and the distance between the first valve cutting device 10 and the second valve cutting device 11 is 150mm respectively.

One end of the first liquid inlet branch pipe 3 and one end of the second liquid inlet branch pipe 4, which are far away from the air-temperature type gasifier, are respectively communicated with a liquid inlet main pipe 7 for realizing liquid inlet.

The junction of the first liquid outlet branch pipe 8 and the second liquid outlet branch pipe 9 is communicated with a liquid outlet main pipe 12 for realizing liquid outlet.

The main innovation of the utility model is that: the gate cutting devices are respectively arranged on the liquid outlet branch pipes of the two air temperature type gasifiers, and when one air temperature type gasifier is overhauled, the other air temperature type gasifier can normally operate, so that the gas service in the urban area can be normally supplied, and the occurrence of safety accidents is avoided.

The working principle and the using flow of the utility model are as follows:

when emergency repair is needed when the first air temperature type gasifier 1 is out of question, the first gate 5 is closed in an emergency mode to cut off the feed liquid LNG, and meanwhile the first valve cutting device 10 is closed; at this time, the first air temperature type gasifier 1 can be subjected to detection maintenance after being emptied, and the second gate 6 and the second gate cutting device 11 at the two sides of the second air temperature type gasifier 1 are normally opened to operate;

when the second air temperature type gasifier 2 has a problem and needs urgent repair, the second gate 6 is closed in an urgent way to cut off the feed liquid LNG, and the second valve cutting device 11 is closed at the same time; at this time, the second air-temperature type gasifier 2 can be subjected to detection and maintenance after being emptied, and the first shutter 5 and the first shutter cutting device 10 on both sides of the first air-temperature type gasifier 1 are normally opened.

In summary, through the valve cutting devices respectively arranged on the liquid outlet branch pipes of the two air temperature type gasifiers, when one air temperature type gasifiers has problems, the gate and the gate cutting device of the air temperature type gasifiers can be closed, and the gate valve and the cutting device of the other air temperature type gasifiers can be opened, so that the other air temperature type gasifiers can normally operate, and can normally supply natural gas service for urban areas; and avoid when one air temperature type gasifier goes out the problem, another air temperature type gasifier liquid outlet goes out LNG backward flow, causes the safety in production accident when maintaining.

The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims

1. Cutting device convenient to LNG gasification station air temperature formula vaporizer overhauls, including two air temperature formula gasifiers, its characterized in that: the liquid inlets of the two air temperature type gasifiers are respectively connected with liquid inlet branch pipes, the two liquid inlet branch pipes are respectively provided with gate valves, the liquid outlets of the two air temperature type gasifiers are respectively connected with liquid outlet branch pipes, the two liquid outlet branch pipes are respectively provided with valve cutting devices, and one ends of the two liquid outlet branch pipes far away from the air temperature type gasifiers are intersected.

2. The cutting device for facilitating overhauling of an air temperature type vaporizer of an LNG gasification station according to claim 1, wherein the cutting device comprises: one end of each liquid inlet branch pipe far away from the air-temperature type gasifier is respectively communicated with a liquid inlet main pipe for realizing liquid inlet.

3. The cutting device for facilitating overhauling of an air temperature type vaporizer of an LNG vaporizing station according to claim 1 or 2, wherein: the junction of the two liquid outlet branch pipes is communicated with a liquid outlet main pipe for realizing liquid outlet.