CN112097097A

CN112097097A - Skid-mounted one-island four-skid LNG loading and unloading vehicle

Info

Publication number: CN112097097A
Application number: CN202010910249.1A
Authority: CN
Inventors: 游宇; 彭涛明; 夏永生; 安小霞; 宋媛玲; 高天喜; 许洋; 汪洋; 王思博; 沈楠
Original assignee: China Huanqiu Contracting and Engineering Corp
Current assignee: China Huanqiu Contracting and Engineering Corp
Priority date: 2020-09-02
Filing date: 2020-09-02
Publication date: 2020-12-18

Abstract

The invention provides a skid-mounted one-island four-pry LNG loading and unloading vehicle which is provided with a main body module, four low-temperature oil filling riser modules and two local control cabinet modules; the main body module is provided with a liquid inlet main pipe and an air return main pipe, a liquid phase pipeline is arranged between the liquid inlet main pipe and the four corners of the main body module, and a gas phase pipeline is arranged between the air return main pipe and the four corners of the main body module; the four low-temperature oil filling riser modules are distributed at four corners of the main body module and are respectively provided with a liquid phase branch and a gas phase branch, one end of the liquid phase branch is communicated with the liquid phase pipeline, the other end of the liquid phase branch can be communicated with a liquid inlet pipeline of the LNG tank car, one end of the gas phase branch is communicated with a gas return pipeline of the LNG tank car, and the other end of the gas phase branch is communicated to the gas phase pipeline; the two local control cabinet modules are respectively in signal connection with the two low-temperature oil filling riser modules and can be operated on site and adjusted in flow. By the structure, the operation is convenient, and one to four LNG tank cars can be loaded at the same time.

Description

Skid-mounted one-island four-skid LNG loading and unloading vehicle

Technical Field

The invention relates to an LNG tank wagon loading and unloading skid used in a tank wagon loading unit in an LNG receiving station or a liquefaction station.

Background

In the LNG receiving station or the liquefaction station apparatus, an LNG tanker Loading and Unloading skid (TLP) is generally disposed in the tanker Loading unit.

Current LNG tank wagon loading and unloading car sled includes: 1) a pry block portion; 2) a low temperature oil filling riser; 3) process pipelines (including liquid phase pipelines, gas phase pipelines, liquid collection pipelines, emptying pipelines, nitrogen pipelines, instrument wind pipelines and the like); 4) shut-off valves, safety valves, flow meters, regulating valves, check valves, snap valves, and the like; 5) controlling the panel on site; 6) an electrostatic grounding system; 7) pipe supports, cold insulation materials and the like. These systems are complex, and the manufacturer supplies the goods for the spare parts, the part kind reaches thousands, the bolt total amount is many, cold insulation material dysmorphism, the field construction volume is huge, the construction debugging cycle is very long, seriously influences the progress of whole project, and the manufacturer coordinates the difficulty, and the field service expense is very high. Some manufacturers are skid-mounted, but skid-mounting is not thorough, and a tank car loading skid is only suitable for one LNG tank car loading and unloading car, and the development trend and direction of large-scale, integration and intellectualization of LNG receiving stations and liquefaction station devices are not considered, so that equipment investment is large, factory floor area is wasted, and device integration level is low.

In the prior art, disadvantages of LNG tanker skid include:

1. the construction amount is large, the installation period is long, and the field project progress is seriously influenced;

2. the number of parts is large, and parts are easy to be lost and lost on site;

3. the coordination of manufacturers is difficult, and the service labor cost is high;

4. the installation is complex, and the requirements on installation instructors and site constructors are high;

5. the requirement on the construction precision of the civil foundation is high;

6. only one LNG tank car can be loaded and unloaded;

7. the equipment investment is large, and the economic benefit is not good;

8. the occupied area of a factory is wasted, and the arrangement is tense;

9. the device cannot adapt to the development direction of large-scale and integration of the device, and the integration level of the device is poor.

Disclosure of Invention

The invention provides a novel, modularized, skid-mounted and intelligent LNG tank Truck Loading and Unloading vehicle skid (TLP) system. The technology not only can greatly shorten the installation and debugging time of field construction, reduce the construction and debugging personnel and save the cost of field machines, but also can adapt to the development trend and direction of large-scale, comprehensive, integrated and intelligent LNG receiving stations and liquefaction stations, improve the integration level of devices, reduce the equipment investment and save the occupied area of factories.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a sled dress ization "four sled in one island" LNG loading and unloading car which characterized in that: the system comprises a main body module, four low-temperature crane pipe modules and two local control cabinet modules; each module can be independently pried;

the main body module is provided with a liquid inlet main pipe and an air return main pipe, a liquid phase pipeline is arranged between the liquid inlet main pipe and the four corners of the main body module, and a gas phase pipeline is arranged between the air return main pipe and the four corners of the main body module;

the four low-temperature oil filling riser modules are distributed at four corners of the main body module, each low-temperature oil filling riser module is provided with a liquid phase branch and a gas phase branch, one end of each liquid phase branch is communicated with the liquid phase pipeline, the other end of each liquid phase branch can be communicated with the liquid inlet pipeline of the LNG tank car, one end of each gas phase branch is communicated with the gas return pipeline of the LNG tank car, and the other end of each gas phase branch is communicated to the gas phase pipeline;

the two local control cabinet modules are respectively in signal connection with the two low-temperature oil filling riser modules and can be operated on site and adjusted in flow.

Sled dress change "four sled on one island" LNG loading and unloading car, wherein: a liquid path stop valve, a flow regulating valve and a flowmeter are sequentially arranged on the liquid phase pipeline; the gas phase pipeline is sequentially provided with a check valve and a gas circuit cut-off valve.

Sled dress change "four sled on one island" LNG loading and unloading car, wherein: the local control cabinet module is in signal connection with the liquid path stop valve, the flow regulating valve, the flowmeter, the check valve and the gas path stop valve.

Sled dress change "four sled on one island" LNG loading and unloading car, wherein: the liquid phase branch and the gas phase branch of each low-temperature oil filling riser module have the same structure and respectively comprise an inner arm, an outer arm and a rotary joint which extend from the upright post, and a nitrogen purging pipeline and a buffer cylinder are arranged between the inner arm and the outer arm; and the pillars are installed at the corners of the body module by bolts.

Sled dress change "four sled on one island" LNG loading and unloading car, wherein: the two local control cabinet modules are fixed on one side of the main body module in a mirror symmetry mode.

Compared with the prior art, the invention has the beneficial effects that: each module can be independently prized, so that construction and installation are facilitated, and meanwhile, the internal module can be independently dismounted or replaced during maintenance; the operating personnel uses two on-the-spot switch board modules to carry out the loading operation at the scene to can realize that one to four LNG tank cars load simultaneously.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structural principle of the body module;

FIG. 3 is a schematic view of a liquid phase line;

FIG. 4 is a schematic view of the structure of a gas phase line;

FIG. 5 is a schematic diagram of a cryogenic loading arm module;

FIG. 6 is a schematic diagram of a local control cabinet module.

Description of reference numerals: a main body module 1; a liquid phase line 11; a gas phase line 12; a liquid path shut-off valve 13; a flow rate regulating valve 14; a flow meter 15; a check valve 16; an air passage cut-off valve 17; a main liquid inlet pipe 18; a return main pipe 19; a low temperature oil filling riser module 2; a column 21; an inner arm 22; a nitrogen purge line 23; a cushion cylinder 24; an outer arm 25; a rotary joint 26; a liquid phase branch 27; a gas phase branch 28; a local control cabinet module 3; a case 31; a display screen 32; a key 33.

Detailed Description

The invention combines the process pipelines (including liquid phase pipelines, gas phase pipelines, liquid collecting pipelines, emptying pipelines, nitrogen pipelines, instrument air pipelines and the like) in the traditional four tank car skids, combines a local control panel, an electrostatic grounding system, a pipeline bracket, cold insulation materials and the like, is arranged in one island after optimized design and comprehensive integration, forms the loading and unloading technology of 'one island with four skids', and can load and unload four LNG tank cars simultaneously.

As shown in figure 1, the one-island four-pry tank car loading pry system is divided into seven modules according to the one-island four-pry tank car loading pry system composition through installation functionalization, prying and independence consideration; the method comprises the following steps: the device comprises a main body module 1, four low-temperature crane pipe modules 2 and two local control cabinet modules 3; all above modules can independently become the sled, be convenient for construction and installation, can demolish alone or change inside module simultaneously when the maintenance.

The main body module 1 mainly comprises pipelines, instruments and valves which can realize the function of tank car loading, as shown in fig. 2, a liquid inlet main pipe 18 and an air return main pipe 19 are arranged at the center of the main body module, a liquid phase pipeline 11 is arranged between each corner of the main body module 1 and the liquid inlet main pipe 18, and a gas phase pipeline 12 is arranged between each corner of the main body module 1 and the air return main pipe 19;

the liquid phase pipeline 11 is structurally shown in fig. 3, one end of the liquid phase pipeline is communicated with a main liquid inlet pipe 18, a liquid path cut-off valve 13, a flow regulating valve 14 and a flow meter 15 are sequentially arranged on the liquid phase pipeline, and the other end of the liquid phase pipeline is communicated to the corner of the main body module 1;

the gas phase pipeline 12 is structured as shown in fig. 4, one end of which is connected to the corner of the main body module 1, a check valve 16 and a gas path shut-off valve 17 are sequentially installed, and the other end is connected to the return main pipe 19;

in addition, the main body module 1 should also have a cold circulation pipeline and have the functions of pressure relief and purging of LNG, and these structures and functions are conventional structures and functions in the field, and are not described herein again;

the four low-temperature oil filling riser modules 2 are distributed at four corners of the main body module 1, each low-temperature oil filling riser module 2 can be respectively connected with an LNG tank wagon, as shown in FIG. 5, each low-temperature oil filling riser module 2 is divided into an upper path and a lower path, wherein the upper path is a liquid phase branch 27 and is used for connecting the liquid phase pipeline 11 with a liquid inlet pipeline of the LNG tank wagon, and the lower path is a gas phase branch 28 and is used for connecting the gas phase pipeline 12 with a gas return pipeline of the LNG tank wagon;

the structure of the upper road and the lower road is basically the same, the upper road and the lower road respectively comprise an inner arm 22, an outer arm 25 and a rotary joint 26, the inner arm 22 and the outer arm 25 extend from the upright post 21, and a nitrogen purging pipeline 23 and a buffer cylinder 24 are arranged between the inner arm 22 and the outer arm 25; the upright posts 21 are mounted on the corners of the main body module 1 through bolts;

the two local control cabinet modules 3 can be connected with the main body module 1 through bolts, are fixed on one side of the main body module 1 in a mirror symmetry manner, and are respectively used for controlling the local operation, related flow regulation and the like of the two low-temperature crane pipe modules 2, as shown in fig. 4, each local control cabinet module 3 is provided with a box body 31, a display screen 32 and a key 33 are arranged on the box body 31, a control system in the box body 31 is connected with all instruments (such as a liquid path stop valve 13, a flow regulating valve 14, a flow meter 15, a check valve 16, a gas path stop valve 17 and the like) in the main body module 1 through a terminal block and an instrument bridge frame and an instrument cable in the main body module 1, can receive signals of pressure, flow, temperature and the like on site, and can be displayed in the display screen 32, so that the tank car loading state of the; and, the manual/automatic control of the tank car loading process can be realized through the key 33.

LNG is connected with a liquid inlet main pipe 18 of a main body module 1 through a loading main pipeline, flow and pressure regulation is carried out after the LNG enters the main body module 1, the LNG is connected to four LNG tank wagons arranged at four corners of the main body module 1 through four liquid phase pipelines 11 and four low-temperature oil filling riser modules 2, NG generated in the loading process of the LNG tank wagons is converged to a gas return main pipe 19 through the low-temperature oil filling riser modules 2 and the gas phase pipeline 12, and then the LNG is sent to a gas phase return main pipe; so, operating personnel uses two on the spot switch board modules 3 to carry out the loading operation at the scene, can realize one to four LNG tank cars loading.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The utility model provides a sled dress ization "four sled in one island" LNG loading and unloading car which characterized in that: the system comprises a main body module, four low-temperature crane pipe modules and two local control cabinet modules; each module can be independently pried;

2. The skid-mounted "one island four skid" LNG loader of claim 1, wherein: a liquid path stop valve, a flow regulating valve and a flowmeter are sequentially arranged on the liquid phase pipeline; the gas phase pipeline is sequentially provided with a check valve and a gas circuit cut-off valve.

3. The skid-mounted "one island four skid" LNG loader of claim 2, wherein: the local control cabinet module is in signal connection with the liquid path stop valve, the flow regulating valve, the flowmeter, the check valve and the gas path stop valve.

4. The skid-mounted "one island four skid" LNG loader of claim 1, wherein: the liquid phase branch and the gas phase branch of each low-temperature oil filling riser module have the same structure and respectively comprise an inner arm, an outer arm and a rotary joint which extend from the upright post, and a nitrogen purging pipeline and a buffer cylinder are arranged between the inner arm and the outer arm; and the pillars are installed at the corners of the body module by bolts.

5. The skid-mounted "one island four skid" LNG loader of claim 1, wherein: the two local control cabinet modules are fixed on one side of the main body module in a mirror symmetry mode.