Incineration tower for ship inert gas generation

Abstract

The utility model discloses an incineration tower for ship inert gas generation, which comprises an incineration tower outer shell, a combustion chamber is arranged on the outer shell, a fuel oil nozzle and a combustion-supporting gas pipeline are arranged on the combustion chamber, and a spark plug is further arranged on the combustion chamber on one side of the fuel oil nozzle. A combustion chamber is arranged in the outer shell, a vaporizing chamber is arranged in the outer shell below the combustion chamber, the vaporizing chamber penetrates through the outer shell and is communicated with the combustion chamber, the bottom of the vaporizing chamber is communicated with the interior of the outer shell, and an inert gas outlet is formed in the outer shell between the combustion chamber and the bottom of the vaporizing chamber; the incineration tower has the advantages that low-sulfur oil is fully combusted to generate inert gas, the stability of methane can be guaranteed by filling the inert gas into the liquid cargo tank, and the incineration tower has good combustion efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of incineration towers, in particular to an incineration tower used for generating inert gas on ships. Background Art

[0002] The incinerator is a volatile gas treatment equipment commonly used on liquefied petroleum gas (LNP) and liquefied natural gas (LNG) transport ships. When the liquid cargo tank is warmed up or filled, the mixed gas of natural gas (mainly methane) and nitrogen blown from the liquid cargo tank is burned; during the LNG transportation process, the liquid natural gas will continue to evaporate. If the volatile gas is not handled in time, the tank pressure will continue to rise, and excessive tank pressure will cause damage to the liquid cargo tank, so it is generally consumed through the natural gas incinerator, thereby controlling the tank pressure within a safe range;

[0003] Therefore, under certain working conditions, the consumption of volatile gas will be much less than the volatilization amount. For example, when the ship is resting at anchor or loading and unloading at the dock, in order to maintain the stable cabin pressure, the ship has to use a natural gas incinerator to consume the excess volatile gas. This wastes resources by burning natural gas.

[0004] At present, in order to maintain stable tank pressure, inert gas can also be filled into the liquid cargo tank to ensure the stability of methane. This method requires the incinerator on the ship to be converted into an inert gas incinerator, so that the incinerator can achieve full combustion of low sulfide to produce CO2 inert gas. Utility Model Content

[0005] The utility model aims to solve the above technical problems and to provide an incineration tower for generating inert gas on board ships, through which low sulfide can be fully burned to produce CO2 inert gas.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an incineration tower for generating inert gas on ships, comprising an outer shell of the incineration tower, the outer shell being provided with a combustion chamber, the combustion chamber being provided with a fuel oil nozzle and a combustion-supporting gas pipeline, a spark plug being further provided on the combustion chamber on one side of the fuel oil nozzle, a vaporization chamber being provided in the outer shell below the combustion chamber, the vaporization chamber being communicated with the combustion chamber through the outer shell, the bottom of the vaporization chamber being communicated with the inside of the outer shell, and an inert gas outlet being provided on the outer shell between the combustion chamber and the bottom of the vaporization chamber.

[0007] In order to ensure the temperature of the vaporization chamber and keep the vaporization chamber at a high temperature so that the fuel oil can be fully burned and vaporized to generate inert gas, a further preferred technical solution is that the outer shell is provided with a heat insulation cover which is sleeved outside the vaporization chamber, the upper end of the heat insulation cover is connected to the outer shell, and the lower end of the heat insulation cover is connected to the bottom of the vaporization chamber.

[0008] In order to filter the coked particulate matter after the combustion of fuel oil in the inert gas, a further preferred technical solution is that a spray main pipe arranged along the axial direction of the outer shell is provided on the outside of the outer shell, and at least two spray branches are provided on the spray main pipe, one of which penetrates the outer shell and the heat insulation cover in sequence and enters the space formed by the vaporization chamber and the heat insulation cover, and the other spray branch pipe penetrates the outer shell and enters the space formed by the vaporization chamber and the outer shell, and a post-spraying liquid recovery port is provided at the bottom of the outer shell.

[0009] Since the spraying liquid is directly seawater, in order to remove algae in the seawater and the coked particles after filtering, a further preferred technical solution is that at least two layers of filter screens are provided between the outer periphery of the heat insulation cover and the inner wall of the outer shell.

[0010] In order to make the fuel oil burn fully and the structure of the combustion chamber burn fully, a further preferred technical solution is that the combustion-supporting gas pipeline entering along the tangential direction of the combustion chamber is an integrated spiral structure with the combustion chamber.

[0011] In order to mix the fuel oil and the combustion-supporting gas fully and evenly to achieve full combustion, a further preferred technical solution is that a plurality of spoilers arranged in a circular array along the axis of the combustion chamber are provided in the combustion chamber.

[0012] In order to mix the fuel oil and the combustion-supporting gas fully and evenly to achieve sufficient combustion, a further preferred technical solution is that the spoiler is a curved plate, and the head and tail of two adjacent spoilers are staggered and spaced apart.

[0013] In order to effectively filter the coking particulate matter after the combustion of the fuel oil, sufficient spray filtration is carried out through the spray branch pipe. A further preferred technical solution is that the spray branch pipe between the gasification chamber and the outer shell is arranged in an annular manner.

[0014] In order to ensure that the spray liquid flows out from between the gasification chamber and the heat insulation cover and prevent the attachment of coked particles and algae, a further preferred technical solution is that the bottom of the gasification chamber is connected to the lower end of the heat insulation cover by an annular connecting plate, and the annular connecting plate is provided with a circle of serrations near the outer circle of the heat insulation cover.

[0015] In order to ensure that the incineration tower has a stable structure and is easy to process and manufacture, a further preferred technical solution is that the axes of the outer shell, combustion chamber, gasification chamber, and heat insulation cover are collinear.

[0016] Compared with the prior art, the utility model has the following beneficial effects: providing an incineration tower to fully burn low-sulfur oil to generate inert gas, and filling the liquid cargo tank with inert gas to ensure the stability of methane, and the incineration tower has good combustion efficiency; using a filter screen and a spray pipe to purify the inert gas containing coking particles, thereby improving the purity of the inert gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the axonometric drawing of the utility model;

[0018] Figure 2 For this utility model Figure 1 A top view of

[0019] Figure 3 For this utility model Figure 2 AA section view;

[0020] Figure 4 This is an axonometric view of the utility model without the outer shell;

[0021] Figure 5 This is an axonometric view of the utility model without the outer shell and the heat shield;

[0022] Figure 6 It is an axonometric view of the spoiler of the utility model;

[0023] In the figure: 1. outer shell; 2. outlet; 3. guardrail; 4. combustion chamber; 5. fuel oil nozzle; 6. combustion-supporting gas pipeline; 7. upper spray branch pipe; 8. step; 9. spray main pipe; 10. lower spray branch pipe; 11. support leg; 12. closing; 13. heat shield; 14. spoiler; 15. vaporization chamber; 16. upper filter screen; 17. lower filter screen; 18. annular connecting plate; 19. serration. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Example

[0026] like Figure 1-3As shown, an incineration tower for inert gas generation on ships includes an outer shell 1 of the incineration tower. In this embodiment, the outer shell 1 is a cylinder, and the top cover on the cylinder is connected by bolts and nuts to form a closed inner cavity. The bottom of the cylinder has a truncated cone-shaped closing 12, and the lower part of the cylinder is provided with four legs 11 arranged in a ring array for supporting the outer shell 1 of the incineration tower. A combustion chamber 4 is provided on the top cover of the outer shell 1, and a fuel oil nozzle 5 and a combustion-supporting gas pipeline 6 entering along the tangential direction of the combustion chamber are provided on the combustion chamber 4. In this embodiment, the combustion-supporting gas pipeline 6 entering along the tangential direction of the combustion chamber is a spiral integrated structure with the combustion chamber 4, and the spiral central axis of the combustion chamber 4 is colinear with the axis of the outer shell 1. A spark plug is also provided on the combustion chamber 4 on one side of the fuel oil nozzle 5. Low-sulfur oil is sprayed into the combustion chamber 4 according to a certain metering through the fuel oil nozzle 5, and at the same time, the combustion-supporting gas enters the combustion chamber 4 through the combustion-supporting gas pipeline 6. Under the action of the spark plug, the low-sulfur oil is ignited and fully burned in the combustion chamber 4. A vaporization chamber 15 is provided in the outer shell 1 below the combustion chamber 4. In this embodiment, the vaporization chamber 15 is a pipe with a cross-section similar to an ellipse, and a cylindrical pipe mouth is provided at the lower end. The vaporization chamber 15 passes through the outer shell 1 and is connected to the combustion chamber 4. The bottom of the vaporization chamber 15 is connected to the inside of the outer shell 1. In this way, the low-sulfur oil is fully burned in the combustion chamber 4 and the combustion chamber 4 generates high pressure, which prompts the combustion gas to enter the vaporization chamber 15 and be fully vaporized to form an inert gas. Since the middle structure of the vaporization chamber 15 is larger than the lower structure, the pressure of the inert gas formed in the middle is greater than the pressure of the inert gas at the bottom, which helps the inert gas to enter the outer shell 1 from the bottom of the vaporization chamber 15. An inert gas outlet 2 is provided on the outer shell 1 between the combustion chamber 4 and the bottom of the vaporization chamber 15. In this embodiment, the outlet 2 is a flange interface to facilitate the connection of the inert gas delivery pipeline.

[0027] like Figure 4 As shown, in order to ensure the temperature of the vaporization chamber 15 and keep the vaporization chamber 15 at a high temperature so that the fuel oil is fully burned and gasified to generate inert gas, further, the outer shell 1 is provided with a heat insulation cover 13 sleeved outside the vaporization chamber 15. In this embodiment, the heat insulation cover 13 is a stepped cylindrical structure, the upper end of the heat insulation cover 13 is connected to the top cover of the outer shell 1, and the lower end of the heat insulation cover 13 is connected to the bottom of the vaporization chamber 15. The heat insulation cover 13 is colinear with the axis of the vaporization chamber 15 and is spaced a certain distance from the vaporization chamber 15, forming a heat-insulating protective cavity on the periphery of the vaporization chamber 15, so as to block the transfer of temperature, and the heat insulation cover 13 and the upper part of the vaporization chamber 15 form a closed space with a cross-section of an inverted right-angled trapezoid for arranging a spray pipe;

[0028] like Figure 5As shown, in order to filter the coking particulate matter after the combustion of fuel oil in the inert gas and clean the outer shell 1, further, the outer shell 1 is provided with a spray main pipe 9 arranged along the axial direction of the outer shell. In this embodiment, the spray main pipe 9 is provided with two spray branches, one of which is an upper spray branch pipe 7 that passes through the outer shell 1 and the heat insulation cover 13 from the upper part of the top cover of the outer shell 1 in sequence and enters the space formed by the vaporization chamber 15 and the heat insulation cover 13. The upper spray branch pipe 7 can realize the cleaning of the vaporization chamber 15 and the heat insulation cover 1 3, the coking particulate matter in the cavity between the heat insulation cover 13 is filtered to improve the purity of the inert gas, and the internal space can also be cleaned at the same time, wherein another lower spray branch pipe 10 penetrates the outer shell 1 and enters the space formed above the bottom of the heat insulation cover 13 and the outer shell 1, and the bottom of the outer shell 1 is provided with a closing opening 12 for liquid reflux after spraying, and the coking particulate matter in the cavity between the heat insulation cover 13 and the outer shell 1 can be filtered through the lower spray branch pipe 10, so as to improve the purity of the inert gas, and the internal space can also be cleaned at the same time;

[0029] Since the spray liquid directly uses seawater, in order to remove algae in the seawater and coked particles in the inert gas, further, two layers of filter screens are provided between the outer periphery of the heat insulation cover 13 and the inner wall of the outer shell 1, and each layer of filter screen is a grid-shaped filter screen formed by multiple ring filter plates through radial connecting plates, wherein an upper filter screen 16 is located in the middle of the heat insulation cover 13, and another lower filter screen 17 is located at the lower end of the heat insulation cover 13. The upper filter screen 16 and the lower filter screen 17 can filter the algae in the seawater and the attached coked particles, and can also support the heat insulation cover 13 and the gasification chamber 15;

[0030] like Figure 6 As shown, in order to make the fuel oil and the combustion-supporting gas fully mixed and evenly mixed to achieve full combustion, it is further preferred that in another embodiment, a plurality of spoilers 14 arranged in a circular array along the axis of the combustion chamber 4 are provided in the combustion chamber 4; in the embodiment, preferably four spoilers 14 are provided, and the four spoilers 14 surround the outer periphery of the fuel oil nozzle 5 and divide the combustion chamber 4 into the outer periphery and the core of the combustion chamber 4 which are interconnected, and the combustion-supporting gas entering along the combustion-supporting gas pipeline 6 enters the core from the outer periphery of the combustion chamber 4 through the gas channels formed by the spoilers 14 adjacent to each other in pairs, so that the combustion-supporting gas can enter the core of the combustion chamber 4 from all sides, and can be fully mixed and burned with the low-sulfur oil sprayed from the fuel oil nozzle 5 located in the core of the combustion chamber 4;

[0031] In order to make the fuel oil and the combustion-supporting gas fully mixed and evenly mixed to achieve full combustion, further, the spoiler 14 is a curved plate, and the head and tail of two adjacent deflection plates 14 are staggered and spaced to form a gas channel, and the direction of the gas channel entering the core from the periphery is consistent with the direction of the combustion-supporting gas pipeline 6 entering along the tangent of the combustion chamber, so that the combustion-supporting gas enters the core of the combustion chamber 4 in the same flow direction, which is convenient for the circulation of the combustion-supporting gas;

[0032] In order to effectively filter the coking particles after the fuel oil is burned, the spray branch pipe is used for sufficient spray filtration. Furthermore, the lower spray branch pipe 10 between the gas insulation cover 13 and the outer shell 1 is arranged in an annular shape, and the lower spray branch pipe 10 surrounds the lower filter screen 17, so that the coking particles can be fully filtered and the lower filter screen 17 can be cleaned.

[0033] In order to ensure that the spray liquid flows out from between the gasification chamber 15 and the heat insulation cover 13 and prevent the attachment of coked particles and algae, further, the bottom of the gasification chamber 15 is connected to the lower end of the heat insulation cover 13 through an annular connecting plate 18, and the annular connecting plate 18 is provided with a circle of saw teeth 19 near the outer circle of the heat insulation cover 13, and the spray liquid can flow back to the bottom of the outer shell 1 through the saw teeth 19;

[0034] A guardrail 3 is also provided on the top of the outer shell 1, and a staircase 8 from the bottom to the top is also provided on the outside of the outer shell 1 for maintenance of the incineration tower.

[0035] Working principle: combustion-supporting gas enters the combustion chamber 4 through the combustion-supporting gas pipeline 6, and low-sulfur oil is sprayed into the combustion chamber 4 through the fuel oil nozzle 5. The low-sulfur oil is ignited by the spark plug to burn and enter the vaporization chamber 15 for full vaporization to form an inert gas containing coked particles. The inert gas enters the outer shell 1 from the bottom of the vaporization chamber 15, and passes through the lower filter 17 and the upper filter 16 from the bottom of the outer shell 1 to filter the coked particles, so that the purity of the inert gas is improved, and then the inert gas is supplied through the inert gas outlet 2. In order to further improve the purity of the inert gas, seawater can be sprayed on the inert gas containing coked particles through the spray pipe, and the coked particles attached to the filter can be cleaned at the same time, so that the purity of the inert gas is further improved.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An incineration tower for generating inert gas on ships, characterized in that: It includes an outer shell of an incineration tower, wherein the outer shell is provided with a combustion chamber, the combustion chamber is provided with a fuel oil nozzle and a combustion-supporting gas pipeline, a spark plug is also provided on the combustion chamber on one side of the fuel oil nozzle, a vaporization chamber is provided in the outer shell below the combustion chamber, the vaporization chamber is communicated with the combustion chamber through the outer shell, the bottom of the vaporization chamber is communicated with the inside of the outer shell, and an inert gas outlet is provided on the outer shell between the combustion chamber and the bottom of the vaporization chamber.

2. The incineration tower for generating inert gas for ships according to claim 1, characterized in that: A heat insulation cover sleeved outside the vaporization chamber is provided inside the outer shell, the upper end of the heat insulation cover is connected to the outer shell, and the lower end of the heat insulation cover is connected to the bottom of the vaporization chamber.

3. The incineration tower for generating inert gas for ships according to claim 2, characterized in that: At least two layers of filter screens are arranged between the periphery of the heat insulation cover and the inner wall of the outer shell.

4. The incineration tower for generating inert gas for ships according to claim 3, characterized in that: A spray main pipe arranged along the axial direction of the outer shell is provided on the outside of the outer shell, and at least two spray branch pipes are provided on the spray main pipe, one of which penetrates the outer shell and the heat insulation cover in sequence and enters the space formed by the vaporization chamber and the heat insulation cover, and the other spray branch pipe penetrates the outer shell and enters the space formed by the vaporization chamber and the outer shell, and a post-spraying liquid recovery port is provided at the bottom of the outer shell.

5. The incineration tower for generating inert gas for ships according to claim 1, characterized in that: The combustion-supporting gas pipeline and the combustion chamber are a spiral integrated structure.

6. The incineration tower for generating inert gas for ships according to claim 5, characterized in that: The combustion chamber is provided with a plurality of spoilers arranged in a circular array along the axis of the combustion chamber.

7. The incineration tower for generating inert gas for ships according to claim 6, characterized in that: The spoiler is a curved plate, and the head and tail of two adjacent spoilers are arranged in a staggered manner.

8. The incineration tower for generating inert gas for ships according to claim 4, characterized in that: The spray branch pipe between the gasification chamber and the outer shell is arranged in an annular manner.

9. The incineration tower for generating inert gas for ships according to claim 2, characterized in that: The bottom of the vaporization chamber is connected to the lower end of the heat insulation cover via an annular connecting plate, and the outer circle of the annular connecting plate close to the heat insulation cover is provided with a circle of saw teeth.

10. The incineration tower for generating inert gas for ships according to claim 2, characterized in that: The axes of the outer shell, the combustion chamber, the gasification chamber and the heat shield are collinear.

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