Ship natural gas incineration device electrical cabinet preparation cabin and GCU low-temperature test method

Abstract

The invention discloses a ship natural gas incineration device electrical cabinet preparation cabin and a GCU low-temperature test method, and the method comprises the steps: arranging an electrical cabinet preparation cabin at a position, which is closer to a natural gas incineration device, outside a test center explosion-proof region, and placing an electrical cabinet of the natural gas incineration device in the electrical cabinet preparation cabin; the electrical cabinet preparation cabin is used for providing stable operation environments such as fire prevention, explosion prevention, dust prevention, ventilation, constant temperature and constant humidity for the electrical cabinet so as to simulate a real test environment of a sea test, so that the operation performance of the natural gas incineration device in a low-temperature state can be accurately tested on the land.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and in particular to a preparatory compartment for the electrical cabinet of a ship's natural gas combustion device and a low-temperature testing method for the GCU. Background Technology

[0002] The Gas Combustion Unit (GCU) on liquefied natural gas (LNG) ships is mainly used to treat the boil-off gas (BOG) generated during transportation to ensure the safe operation of the ship.

[0003] Typically, cryogenic testing of the natural gas combustion unit is required during the gas trial phase after the completion of construction of a newly built LNG carrier and before it is put into service. Currently, cryogenic testing of the natural gas combustion unit is usually conducted in conjunction with actual LNG loading during sea trials after the ship's construction is completed. However, due to the limited space on board the ship, the commissioning of the natural gas combustion unit is quite complex, affecting the overall sea trial cycle of the ship and potentially posing safety hazards. Summary of the Invention

[0004] In view of this, the present invention provides a preparatory compartment for the electrical cabinet of a ship natural gas combustion device and a low-temperature testing method for the GCU, in order to solve the problems existing in the above-mentioned background art.

[0005] A preparatory compartment for an electrical cabinet of a marine natural gas combustion unit includes a preparatory compartment body for the gas combustion unit (GCU) and a support block for supporting the GCU preparatory compartment body. The GCU preparatory compartment body is located on land near the installation location of the natural gas combustion unit. The electrical cabinet is placed inside the GCU preparatory compartment body. The surface of the GCU preparatory compartment body is provided with ventilation doors, pedestrian doors, air handling equipment, and inlet / outlet flanges for connecting cooling water pipes to use cooling water to cool the electrical cabinet. The bottom of the GCU preparatory compartment body has a cable inlet hole. Firewalls are provided on all four sides of the inner wall and the inner side of the top plate of the GCU preparatory compartment body.

[0006] Preferably, the top plate of the GCU preparation chamber is also equipped with multiple waterproof lights.

[0007] Preferably, the GCU preparation compartment includes an open main compartment and a detachable top plate on the top of the main compartment. A top cover plate is fixed on the upper surface of the top plate, and multiple top cover plate pressing blocks (13) are provided on the front and rear sides of the top plate. The upper end of the top cover plate pressing block is fixed to the top cover plate by fasteners, and the lower end is welded to the top of the main compartment.

[0008] Preferably, the lower surface of the top plate is provided with multiple detachable reinforcing beams along its length, and the top plate is also provided with multiple lifting points.

[0009] Preferably, the firewall comprises, from inside to outside, a fireproof interior panel, a fireproof insulation material, and a corrugated board, and the fireproof insulation material is provided with at least one layer.

[0010] Preferably, the pier includes a support frame composed of transverse supports and longitudinal supports, a plurality of legs fixed to the bottom of the support frame, and oblique support brackets connecting the support frame and the legs obliquely, and the legs are connected to the embedded parts on the ground.

[0011] Preferably, the bottom of the GCU preparation cabin is provided with a plurality of reinforcing supports, and the reinforcing supports are arranged at equal intervals along the length direction of the preparation cabin, and the cable inlet hole is arranged on the bottom plate between two reinforcing supports.

[0012] Preferably, the front face and the cabin surface on the left and right sides of the GCU preparation cabin are provided with ventilation doors; the man door, the air treatment device, and the import and export reserved flanges are arranged on the front cabin surface of the GCU preparation cabin, and the air treatment device is symmetrically arranged, and the import and export reserved flanges are arranged below the air treatment device.

[0013] Preferably, the distance between the GCU preparation cabin and the natural gas combustion device is not less than the explosion-proof safety distance of the natural gas combustion device.

[0014] A method for performing GCU low-temperature test by using a natural gas combustion device electrical cabinet preparation cabin of a ship, specifically comprising the following steps:

[0015] S1. Arranging the GCU preparation cabin near the natural gas combustion device according to the arrangement position of the natural gas combustion device on land;

[0016] S2. Opening the top plate, and slowly hoisting and placing the electrical cabinet into the cabin through the top opening of the GCU preparation cabin;

[0017] S3. Passing the cable installed on the natural gas combustion device through the cable inlet hole of the GCU preparation cabin to connect with the electrical cabinet in the cabin, and connecting the cooling water inlet and outlet of the electrical cabinet with the import and export reserved flanges through a hose, and then connecting the import and export reserved flanges with the cooling water pipe, and after the installation of the natural gas combustion device electrical cabinet, closing and locking the top plate;

[0018] S4. Connecting the natural gas combustion device with the test pipeline;

[0019] S5. Blowing and dropping the dew point by using the test pipeline to input nitrogen into the natural gas combustion device, and after the dew point reaches the test requirement, inputting low-temperature natural gas into the natural gas combustion device to simulate the low-temperature condition of the actual operation environment;

[0020] S6. Starting the natural gas combustion device under the simulated test working condition, and observing and recording the performance index of the natural gas combustion device.

[0021] The beneficial effects of the present application are:

[0022] 1、The present application sets up the electrical cabinet standby cabin in the position close to the natural gas burning device outside the distance from the explosion-proof area of the test center, places the electrical cabinet of the natural gas burning device in the electrical cabinet standby cabin, uses the electrical cabinet standby cabin to provide the stable operation environment such as fire prevention, explosion prevention, dust prevention, ventilation, constant temperature and constant humidity for the electrical cabinet, simulates the real test environment of the sea test, so that the running performance of the natural gas burning device in the low temperature state can be tested more accurately on the land.

[0023] 2、The present application arranges the electrical cabinet standby cabin near the natural gas burning device, has the advantages of short installation distance, simple installation process, stable operation environment and convenient maintenance, so that the requirements of the natural gas burning device on the distance and environment of the electrical cabinet are better met; and the standby cabin is combined with the steel structure cabin pier, and the two are fixed by welding or buckling, so that the on-demand multiple deployment of the GCU standby cabin can be realized.

[0024] 3、The bottom of the present application is provided with multiple cable entry holes and a side door, so that the working environment of the subsequent maintenance of the electrical cabinet can be greatly improved, and the arrangement of the cable is facilitated.

[0025] 4、The top plate of the present application adopts a detachable flip cover design, is provided with a detachable reinforcing beam, and the bottom surface of the GCU standby cabin is provided with multiple transverse supports, so that the hoisting and fixed installation of the electrical cabinet of the natural gas burning device of different sizes can be adapted. DETAILED DESCRIPTION

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Figure 1 is a structural schematic view of the natural gas burning device electrical cabinet standby cabin.

[0028] Figure 2 is a side view of the natural gas burning device electrical cabinet standby cabin.

[0029] Figure 3 is a schematic view of the GCU standby cabin body bottom plate.

[0030] Figure 4 is a schematic view of the GCU standby cabin body top plate.

[0031] Figure 5 is a top view of the cabin pier.

[0032] Figure 6 is a front view of the cabin pier.

[0033] Figure 7 is a side view of the cabin pier.

[0034] Figure 8 is a schematic view of unfolding the four sides of the GCU preparation cabin.

[0035] Figure 9 is a structural schematic view of the fireproof wall 16.

[0036] The meanings of the reference numerals in the drawings are as follows:

[0037] 1 is a GCU preparation cabin, 2 is a cabin pier, 3 is a ventilation door, 4 is an air treatment device, 5 is a pedestrian door, 6 is an import and export reserved flange, 7 is a fireproof interior panel, 8 is a fireproof insulation material, 9 is a detachable reinforced beam, 10 is a top plate, 11 is a top cover plate, 12 is a lifting point, 13 is a top cover plate pressing block, 14 is a corrugated board, 15 is a waterproof lamp, 16 is a fireproof wall, 17 is a reinforcing support, 18 is a cable inlet hole, 19 is a transverse support, 20 is a longitudinal support, 21 is a pre-embedded part, 22 is an inclined support elbow plate, and 23 is a supporting leg. DETAILED DESCRIPTION

[0038] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be described below by specific embodiments shown in the drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present application. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present application.

[0039] The terms used in the present disclosure are merely for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The singular forms "a", "said" and "the" used in the present disclosure and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein means and includes any or all possible combinations of one or more associated listed items.

[0040] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0041] In the description of the present application, unless otherwise specified and limited, it is necessary to explain that the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be mechanical connection or electrical connection, it can be the communication inside two elements, it can be direct connection or indirect connection through intermediate medium, and the specific meaning of the above terms can be understood by those skilled in the art according to the specific circumstances.

[0042] In order to better understand the technical solutions of the present application, the present application will be described in detail below in combination with the drawings.

[0043] The present application provides a kind of ship natural gas burning device electrical cabinet preparation cabin, including GCU preparation cabin body 1, with to support GCU preparation cabin body 1 cabin pier 2.

[0044] The GCU preparation cabin body 1 is arranged on land adjacent to the natural gas burning device installation position, but the distance between GCU preparation cabin body 1 and natural gas burning device should be not less than the explosion-proof safety distance of natural gas burning device.In the embodiment, the distance between GCU preparation cabin body 1 and natural gas burning device is not less than 4.5 meters.

[0045] The electrical cabinet is placed in the GCU preparation cabin body 1, and the GCU preparation cabin body 1 is used to provide stable operating environment for the electrical cabinet, such as fire prevention, explosion prevention, dust prevention, ventilation, constant temperature and constant humidity.

[0046] The GCU preparation cabin body 1 includes a main cabin body with an upper opening, and a top plate 10 detachably arranged on the top of the main cabin body, and the upper surface of the top plate 10 is fixed with a top cover plate 11.The front and rear sides of the top plate 10 are also provided with a plurality of top cover plate pressing blocks 13, the lower end of the top cover plate pressing block 13 is welded and fixed on the top of the main cabin body, and the upper end is fixed with the top cover plate 11 by fasteners.When the fasteners are removed, the top plate 10 can be removed together with the top cover plate 11 above it, so that the electrical cabinet can be lifted into the cabin from the upper end opening of the main cabin body.

[0047] In other embodiments, one side of the top plate 10 can also be hingedly fixed with the main cabin body, and the other side of the top plate 10 is provided with a top cover plate pressing block 13, and the lower end of the top cover plate pressing block 13 is welded and fixed on the top of the main cabin body, and the upper end is fixed with the top cover plate 11 by fasteners.When the fasteners are removed, the top plate 10 can be rotated to open, and then the electrical cabinet can be lifted into the cabin from the upper end opening of the main cabin body.

[0048] As preferred, the lower surface of the top plate 10 is also provided with a plurality of detachable reinforcing beams 9 for reinforcing the structure along the length direction of the top plate 10, and a plurality of lifting points 12 are also provided on the top plate 10 for lifting the top plate 10.

[0049] The GCU preparation cabin 1 is provided with ventilation doors 3 on the cabin surface. In this embodiment, ventilation doors 3 are provided on the front surface and both sides of the GCU preparation cabin 1.

[0050] The GCU preparation cabin 1 is also provided with a man door 5, an air treatment device 4 and an inlet and outlet reserved flange 6 for connecting a cooling water pipe to cool the electrical cabinet with cooling water on the cabin surface. In this embodiment, the man door 5, the air treatment device 4 and the inlet and outlet reserved flange 6 are all provided on the front surface of the GCU preparation cabin 1, and the air treatment device 4 is symmetrically arranged, the inlet and outlet reserved flange 6 is arranged below the air treatment device 4, the inlet and outlet reserved flange 6 is used to connect the cooling water pipe, and the air treatment device 4 is used to adjust the temperature and humidity in the cabin. The air treatment device 4 can be selected from industrial air conditioners or fans.

[0051] The front surface of the GCU preparation cabin 1 is provided with two groups of inlet and outlet reserved flanges 6, each group of inlet and outlet reserved flanges 6 includes at least three different standard flanges to connect with cooling water pipes of different specifications.

[0052] The GCU preparation cabin 1 is provided with a cable inlet hole 18 at the bottom, and a plurality of preparation cabin lifting rings are arranged on both sides of the bottom plate of the GCU preparation cabin 1 to lift the entire preparation cabin. Firewalls 16 are arranged on the inner walls and inner sides of the top plate of the GCU preparation cabin 1.

[0053] The firewalls 16 include, from inside to outside, a fireproof interior panel 7, a fireproof insulation material and a corrugated board, and the fireproof insulation material is at least one layer. In this embodiment, the fireproof interior panel and the corrugated board are provided with two layers of fireproof insulation material, one layer of which is rock wool board and the other layer of which is ceramic cotton. That is, the firewalls include, from inside to outside, a fireproof interior panel, a rock wool board, a ceramic cotton and a corrugated board. The fireproof interior panel can be selected from 1mm galvanized steel plate, the rock wool board is 30mm, the ceramic cotton is 20mm, and the thickness of the corrugated board is 1.6mm around and 2mm in the middle.

[0054] As a preferred, the GCU preparation cabin 1 is also provided with a plurality of waterproof lamps 15 on the top plate.

[0055] As a preferred, the GCU preparation cabin 1 is also provided with a plurality of reinforcing supports 17 on the bottom, which are arranged at equal intervals along the length direction of the preparation cabin, and the cable inlet hole 18 is arranged on the bottom plate between two reinforcing supports 17.

[0056] Suppose the length, width and height of the GCU preparation cabin 1 are X, Y and H respectively, and need to meet X≥10m, Y≥2.5m and H≥2.8m; the bottom of the GCU preparation cabin 1 is arranged with n reinforcing supports 17, the distance between adjacent two reinforcing supports 17 is X1, and n≥20, then the length of a single cable inlet hole 18 is equal to the distance between adjacent two reinforcing supports 17, which is also X1, and X needs to meet 0.5m≤X1≤0.7m, the width Y1 of the single cable inlet hole 18 needs to meet 0.6m≤Y1≤1.0m, and the total length X2 of the opening area covered by all the cable inlet holes needs to meet X≥X2≥0.8X, and the number n1 of the cable inlet holes needs to meet n-5≤n1≤n-1;

[0057] Suppose the length of the top cover plate 11 is X3 and the width is Y2, and need to meet 0.7X≤X3≤X, and preferably 0.9Y≤Y2≤Y; the number n3 of the detachable reinforcing beams 9 needs to meet n3≥3.

[0058] The GCU preparation cabin 1 is arranged on the cabin pier 2, and the cabin pier 2 is connected with the embedded part 21 on the ground to support the GCU preparation cabin 1.

[0059] The cabin pier 2 comprises a support frame composed of transverse supports 19 and longitudinal supports 20, a plurality of legs 23 fixed at the bottom of the support frame, and oblique support elbows 22 obliquely connecting the support frame and the legs 23, and the legs 23 are connected with the embedded part 21 on the ground.

[0060] As preferred, the steel structure pier 2 is provided with two pier longitudinal supports 20, the length of which is X4, and X5=X. The distance between the pier longitudinal supports 20 is Y3, and Y3=Y. The pier longitudinal supports 20 are arranged with n pier transverse supports 19, and need to meet n≥4. The pier transverse supports 19 are connected with the longitudinal supports 20 at the legs 23, and the legs 23 are provided with a plurality of support shaft plates 22. The height of the steel structure pier 2 is H1, and needs to meet 0.5m≤H1≤0.7m.

[0061] The application also provides a method for GCU low-temperature test by using the GCU preparation cabin of the ship natural gas incineration device, which specifically comprises the following steps:

[0062] S1, arranging the GCU preparation cabin 1 near the installation position of the natural gas incineration device on land, and the distance between the GCU preparation cabin 1 and the natural gas incineration device is at least 4.5m, and the distance between the GCU preparation cabin 1 and the test center is 100-200m;

[0063] S2, opening the top plate 10, and slowly hoisting the electrical cabinet from the top opening of the GCU preparation cabin 1 into the cabin;

[0064] S3, the cable installed on the natural gas burning device from the GCU preparation cabin 1 cable inlet hole 18 through the cable inlet hole 18 and the cabin electrical cabinet connected with the electrical cabinet cooling water inlet and outlet through the hose and inlet and outlet reserved flange 6, and then the inlet and outlet reserved flange 6 and cooling water pipe connected, natural gas burning device electrical cabinet installation, the top plate 10 cover and lock;

[0065] S4, the natural gas burning device and test pipeline connected;

[0066] S5, using test pipeline to natural gas burning device into nitrogen purging dew point, dew point to test requirements, into the natural gas burning device low temperature natural gas, simulating the actual operating environment of low temperature conditions;

[0067] S6, in the simulated test conditions, start the natural gas burning device, observe and record the performance index of natural gas burning device.

[0068] The above-mentioned electrical cabinet is also connected with the centralized control room of the test center through the cable, so as to transmit the test data of the low temperature test to the centralized control room in time.

[0069] It should be clear that the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

Claims

1. A preparatory compartment for an electrical cabinet of a ship's natural gas combustion device, characterized in that, The system includes a GCU preparation compartment (1) and a support block (2) for supporting the GCU preparation compartment (1). The GCU preparation compartment (1) is located on land near the location of the natural gas combustion device. The electrical cabinet is placed inside the GCU preparation compartment (1). The top of the GCU preparation compartment (1) is equipped with a ventilation door (3), a pedestrian door (5), an air handling unit (4), and inlet / outlet flanges (6) for connecting cooling water pipes to cool the electrical cabinet with cooling water. The bottom of the GCU preparation compartment (1) is provided with a cable inlet hole (18). Firewalls (16) are provided on the inner walls and the inner side of the top plate of the GCU preparation compartment (1).

2. The preparatory compartment for the electrical cabinet of the ship's natural gas combustion device according to claim 1, characterized in that, The top plate of the GCU preparation compartment (1) is also equipped with multiple waterproof lights (15).

3. The preparatory compartment for the electrical cabinet of the ship's natural gas combustion device according to claim 1, characterized in that, The GCU preparation compartment (1) includes a main compartment with an upper opening and a top plate (10) that can be detachably installed on the top of the main compartment. A top cover plate (11) is fixed on the upper surface of the top plate (10). Multiple top cover plate pressure blocks (13) are also provided on the front and rear sides of the top plate (10). The upper end of the top cover plate pressure block (13) is fixed to the top cover plate (11) by fasteners, and the lower end is welded and fixed to the top of the main compartment.

4. The preparatory compartment for the electrical cabinet of the ship's natural gas combustion device according to claim 3, characterized in that, The lower surface of the top plate (10) is provided with multiple detachable reinforcing beams (9) along its length, and the top plate (10) is also provided with multiple lifting points (12).

5. The preparatory compartment for the electrical cabinet of the ship's natural gas combustion device according to claim 1, characterized in that, The firewall (16) includes a fireproof interior panel, a fireproof insulation material and a corrugated board arranged sequentially from the inside to the outside, and the fireproof insulation material is provided in at least one layer.

6. The preparatory compartment for the electrical cabinet of the ship's natural gas combustion device according to claim 1, characterized in that, The pier (2) includes a support frame consisting of a transverse support (19) and a longitudinal support (20), multiple legs (23) fixed at the bottom of the support frame, and an oblique support elbow plate (22) that connects the support frame and the legs (23) at an angle. The legs (23) are connected to embedded parts (21) on the ground.

7. The preparatory compartment for the electrical cabinet of the ship's natural gas combustion device according to claim 1, characterized in that, The bottom of the GCU preparation compartment (1) is provided with multiple reinforcing supports (17), which are equally spaced along the length of the preparation compartment. The cable inlet hole (18) is opened on the bottom plate between two reinforcing supports (17).

8. The preparatory compartment for the electrical cabinet of the ship's natural gas combustion device according to claim 1, characterized in that, Ventilation doors (3) are provided on the front and left and right sides of the GCU preparation chamber (1); the pedestrian door (5), air handling equipment (4) and inlet / outlet reserved flange (6) are all provided on the front side of the GCU preparation chamber (1), and the air handling equipment (4) is symmetrically arranged, and the inlet / outlet reserved flange (6) is located below the air handling equipment (4).

9. The preparatory compartment for the electrical cabinet of the ship's natural gas combustion device according to claim 1, characterized in that, The distance between the GCU preparatory cabin (1) and the natural gas incineration device shall not be less than the explosion-proof safety distance of the natural gas incineration device.

10. A method for conducting low-temperature testing of the gas combustion unit (GCU) using the preparatory compartment of the electrical cabinet for a ship's natural gas combustion device according to any one of claims 1-9, characterized in that, Specifically, the following steps are included: S1, Based on the location of the natural gas combustion device on land, arrange the GCU preparation compartment nearby outside the explosion-proof compartment (1); S2, open the top plate (10) and slowly lower the electrical cabinet into the cabin from the top opening of the GCU preparation cabin (1); S3, pass the cable installed on the natural gas combustion device through the cable inlet hole (18) of the GCU preparatory compartment (1) and connect it to the electrical cabinet inside the compartment. At the same time, connect the cooling water inlet and outlet of the electrical cabinet to the inlet and outlet reserved flange (6) through the hose, and then connect the inlet and outlet reserved flange (6) to the cooling water pipe. After the electrical cabinet of the natural gas combustion device is installed, close and lock the top plate (10). S4 connects the natural gas combustion device to the test pipeline; S5. Nitrogen gas is introduced into the natural gas combustion device through the test pipeline to purge and lower the dew point. After the dew point reaches the test requirements, low-temperature natural gas is introduced into the natural gas combustion device to simulate the low-temperature conditions of the actual operating environment. S6. Under simulated test conditions, start the natural gas combustion device and observe and record its performance indicators.

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