1509results about "For bulk goods" patented technology

The invention provides an aerogel improved honeycomb polyurethane heat insulation module. The aerogel improved honeycomb polyurethane heat insulation module comprises a polyurethane foam core, a heat insulation rod and an insulation box body. The heat insulation rod is arranged in the polyurethane foam core and comprises an outer shell defined by a film with a structure protection function, and aerogel is filled in the outer shell. The polyurethane foam core is of a honeycomb structure and comprises the peripheral edge of the polyurethane foam core and a plurality of wall faces extending in the longitudinal direction. A plurality of adjacently arranged honeycomb holes are formed in the plurality of wall surfaces along a plane array extending transversely; the polyurethane foam core surrounds the side face of the heat insulation rod. The insulation box body surrounds the outer surface of the polyurethane foam core, and the polyurethane foam core top face insulation box body and the polyurethane foam core bottom face insulation box body completely cover the polyurethane foam core and the polyurethane foam core side face periphery insulation box body. According to the technical scheme, the heat leakage loss of liquefied natural gas in the storage and transportation process can be reduced according to the higher heat insulation requirement of a heat insulation module in an existing LNG containment system and the material physical property based on polyurethane and silicon dioxide aerogel.

Membrane tank for containment of fluids at temperature that can differ significantly from ambient temperature, for example for containing a cryogenic fluid, wherein the membrane tank comprises, in direction from an inner containment volume: a primary membrane that is fluid tight, facing the contained fluid in operation and functioning as the primary fluid barrier, an insulation layer, surrounding the membrane on the outside, an outer structure, such as a ship hull or bulkhead or other structure, wherein the outer structure supports the insulation layer and primary membrane inside and carries the resulting forces thereby, and at least one opening for loading and unloading of fluid, and an optional secondary membrane if the outer structure is a steel structure becoming brittle at cryogenic temperature, such as a ship hull outer structure, the secondary membrane dividing the insulation layer into an inner insulation between the primary and secondary membranes and an outer insulation between the secondary membrane and the outer structure, wherein the primary membrane comprises areas of flat, curved or double curved shape and a corrugation in between said areas, wherein said areas are fastened to the underlaying insulation and the corrugations are taking up thermally induced strain. The membrane tank is distinguished in that it further comprises a coupling part for connecting a vacuum pump operatively to the whole insulation layer or the inner insulation layer, for enabling vacuum in the whole insulation layer or the inner insulation layer, during loading, containment and unloading of cryogenic fluid.

The invention belongs to the technical field of low-temperature liquid cargo storage, and particularly relates to an enclosure structure and an enclosure system at a dome corner area of a low-temperature liquefied gas storage tank, and the enclosure structure is arranged at the junction of a dome in the low-temperature liquefied gas storage tank, the top surface of a cabin and a front / rear bulkhead; comprising a corner insulation box connected to a corner, and a plane insulation box connected to a wall surface in the extension direction of the two ends; the corner area secondary-layer steel plate is attached to the inner side of the corner of the corner insulation box, and the corner area main-layer steel plate is welded to the inner side of the corner of the corner area secondary-layer steel plate through the connecting plate. The secondary shielding layer is attached to the surface of the insulation box and is welded with the corner area secondary layer steel plate; the main shielding layer is arranged on the inner side of the secondary shielding layer and is welded with the corner area main layer steel plate; and a supporting fixing plate is arranged between the two. Compared with the prior art, the problems that when an existing enclosure system structure is applied to the dome, stress is large, deformation is large, and structural stability is poor are solved. According to the scheme, the sealing performance and the use reliability of the low-temperature liquefied gas storage tank at the dome corner area are guaranteed.

The invention belongs to the technical field of ship liquid cargo tanks, and discloses a liquid cargo tank heat insulation system and an installation method thereof. The liquid cargo tank heat insulation system comprises a filling mechanism, a fastening mechanism and a plurality of heat insulation blocks, the multiple heat insulation blocks are sequentially laid on a liquid cargo tank shell, each heat insulation block is in an I shape, a splicing gap between any two adjacent heat insulation blocks is in a shape like a Chinese character'zhong ', the splicing gaps are filled with the filling mechanism, and the fastening mechanism is arranged between the filling mechanism and the heat insulation blocks. A fastening mechanism penetrates through each heat insulation block, the bottoms of the fastening mechanisms are fixedly connected with the liquid cargo tank shell, the tops of the fastening mechanisms extend out of the heat insulation blocks, and the fastening mechanisms are configured to fasten the corresponding heat insulation blocks to the liquid cargo tank shell. According to the liquid cargo tank heat insulation system, the connecting stability of the heat insulation blocks on the liquid cargo tank shell is guaranteed, the heat insulation blocks are prevented from falling off from the liquid cargo tank shell, the filling stability of the filling mechanisms in the splicing gaps is also guaranteed, the filling mechanisms are prevented from falling off, the cost is low, and construction installation and repairing operation are convenient.

The utility model relates to the technical field of ships, in particular to a ship with a liquid cargo tank detection channel. Wherein the detection channel is defined by a horizontal girder, a fence and the bulkhead of the liquid cargo tank, a first passing hole communicated with the detection channel is formed in a transverse strong frame of the liquid cargo tank, or an avoiding platform which is arranged on the outer side of the transverse strong frame in a striding mode and is provided with a communication channel is arranged on the longitudinal bulkhead of the liquid cargo tank, and the communication channel is communicated with the detection channels on the two sides of the transverse strong frame. The inherent horizontal girder of the ship liquid cargo tank and the liquid cargo tank wall are used as the main body of the detection channel, so that the manufacturing material is saved, and the cost is reduced; a first passing hole communicated with the detection channel is formed in a transverse strong frame of the liquid cargo tank, or an avoiding platform arranged on the outer side of the transverse strong frame in a crossing mode is arranged on the longitudinal bulkhead of the liquid cargo tank and used for being connected with the detection channel, so that the detection channel does not need to integrally cross the strong frame from the outside, parts are reduced, and cost is reduced.

The invention discloses a water quality monitoring device for environmental protection monitoring, and relates to the field of sampling boats, the water quality monitoring device comprises a hull and three sample storage tanks, the hull is internally provided with a power box, one side of the hull away from the power box is provided with a water pump, one side of the power box is provided with a bottom plate, the upper surface of the bottom plate is uniformly provided with three moving grooves, and the bottom plate is provided with a processing mechanism; the processing mechanism is used for conducting sealing and low-temperature storage on the sample storage tanks, the processing mechanism is composed of an injection assembly, three sealing assemblies and a low-temperature storage assembly, each sealing assembly is arranged on the bottom plate and matched with the fixed arc plate, and each sample storage tank is placed in the corresponding sealing assembly; the injection assembly is used for injecting a sucked sample into the sample storage tank and sealing the sample storage tank through the sealing assembly, and the low-temperature storage assembly is used for cooling the sealed sample storage tank. According to the invention, the full sample storage tank can be sealed and stored, so that the sample is prevented from being influenced by external environments such as dust and gas exchange, and the purity and data accuracy of the sample are ensured.

Methods and systems are provided for transient fluidic coupling via reversibly couplable conduits. In one example, a method includes directing a conduit assembly to a receiving port by releasing one or more fluid streams from the conduit assembly. The method may further include fluidly coupling an internal passage of the conduit assembly to the receiving port. The internal passage may extend from the conduit assembly and along a conduit between a pair of free-floating bodies, such as between a wave engine and a tanker ship, so as to exchange one or more fluids, such as an electrolysis reactant and an electrolysis product. The fluidic coupling may be reversible, in that the conduit assembly may be detached from the receiving port to sever the fluidic coupling. In certain examples, the detaching may be actuated by releasing one or more additional fluid streams from the conduit assembly.

The present invention relates to the field of shipbuilding technology, and in particular to a membrane-type containment system for LNG carriers. The containment system comprises: a main shielding layer, the inner side of which contacts LNG; a main thermal insulation layer, which is arranged on the outer side of the main shielding layer; a secondary thermal insulation layer, which is arranged on the outer side of the main thermal insulation layer; a secondary thermal insulation layer, which is arranged on the outer side of the secondary thermal insulation layer; a load-bearing putty, which is arranged between the outer side of the secondary thermal insulation layer and the load-bearing inner wall of the cabin of the carrier; wherein an inwardly extending anchoring structure is arranged on the load-bearing inner wall of the cabin, and the anchoring structure passes through the secondary thermal insulation layer and the secondary thermal insulation layer, fixes the secondary thermal insulation layer and the secondary thermal insulation layer to the load-bearing inner wall of the cabin, and is used to provide deformation freedom for the main thermal insulation layer and the secondary thermal insulation layer. In the present invention, the secondary thermal insulation layer is connected by the anchoring structure, which can provide deformation freedom for the containment system and avoid mutual tearing between different structural layers of the containment system.

Provided in the present application are a heat-insulating system of a B-type independent liquid tank, and a ship. The heat-insulating system comprises: prefabricated heat-insulating plates arranged on the outer surface of a liquid tank, wherein the side surface of each prefabricated heat-insulating plate is of a step shape; fixing assemblies arranged at joints of the prefabricated heat-insulating plates, wherein each fixing assembly comprises a fixing column and a U-shaped fixing member, two flanges are provided at the top of each U-shaped fixing member, the flanges are arranged on the stepped side surfaces of the prefabricated heat-insulating plates, and each joint between inner heat-insulating layers is filled with an elastic heat-insulating joint-filling material; heat-insulating plug blocks, U-shaped areas of the U-shaped fixing members being filled therewith; joint heat-insulating plates, each of which is arranged in a joint between adjacent outer heat-insulating layers, each joint heat-insulating plate being connected to the prefabricated heat-insulating plates, an extending overlap layer, the U-shaped fixing member and the heat-insulating plug block; and joint protection layers, each of which is laid on the upper surface of a joint between two adjacent prefabricated heat-insulating plates. The present application simplifies the product structure, shortens the design period, simplifies the mounting process, and reduces costs.

Provided is a mounting method for a trihedral-corner-area arrangement structure of a thin-film-type enclosure system. The thin-film-type enclosure system comprises a main-layer thin film layer (34), a fastening attachment plate (35), a main-layer insulating layer (33), a secondary-layer thin film layer (32) and a secondary-layer insulating layer (31), which are sequentially connected and fixed to a ship body structure by means of penetrating fasteners (28), wherein the main-layer thin film layer (34), the main-layer insulating layer (33), the secondary-layer thin film layer (32) and the secondary-layer insulating layer (31) enclose a low-temperature liquid cargo storage tank for accommodating an ultra-low temperature medium, and the main-layer thin film layer (34) is in contact with the ultra-low temperature medium; and a corner area where three side faces intersect with each other comprises a trihedral-corner-area main-layer insulating layer module (101), a trihedral-corner-area secondary-layer insulating layer module (102) and a trihedral-corner-area secondary-layer planar transition insulating module (90). The mounting method comprises: according to set scribe lines, mounting spacer plates (36) and positioning studs (37) on a cabin wall surface of the ship body structure; and then mounting the penetrating fasteners (28), the trihedral-corner-area secondary-layer insulating layer module (102), the trihedral-corner-area secondary-layer planar transition insulating module (90) and other modules, respectively.

The invention discloses a ship independent liquid cargo tank traction floating stopping mechanism and a supporting system. According to the traction floating stopping mechanism and the supporting system, the traction floating stopping mechanism (6) is arranged between the inner bottom of a main hull structure (1) and the bottom of an independent liquid cargo tank (2), and the traction floating stopping mechanism can form downward traction on the independent liquid cargo tank based on the main hull structure; the traction floating stopping mechanism comprises two rope fixing seats (61) and a traction rope (62), the two rope fixing seats are fixedly arranged at the inner bottom of the main ship body structure and the bottom of the independent liquid cargo tank respectively, and the two ends of the traction rope are assembled and connected with the two rope fixing seats respectively; the supporting system comprises the traction floating stopping mechanisms, and the multiple traction floating stopping mechanisms are evenly and discretely arranged. When the main hull structure is damaged, water enters the independent liquid cargo tank, and the independent liquid cargo tank begins to float upwards, the independent liquid cargo tank cannot float upwards and collide with the main hull structure under the traction action of the traction floating stopping mechanism.

The invention relates to the technical field of ship construction, and discloses a cabin non-grounding type supporting system and a ship. The cabin non-grounding type supporting system comprises a support and an anti-swing composite support. The support and anti-swing composite support is arranged between the side wall of the ship body and the side wall of the cabin opposite to the side wall of the ship body, and the support and anti-swing composite support is connected with the side wall of the ship body and the side wall of the cabin; the ship body first connecting piece, the supporting piece and the cabin first connecting piece are sequentially connected from bottom to top, so that the cabin can be supported in the ship body; the first anti-swing piece extends towards the cabin in the horizontal direction and is connected with the first connecting piece of the ship body, so that the cabin non-bottoming type supporting system can buffer the swing force of the cabin on the ship body; the cabin non-grounding type supporting system is arranged between the two side walls, so that installation and later maintenance of the support can be facilitated.

The embodiments of the present disclosure provide a method for mounting a membrane-type containment system carrying cryogenic liquid cargo. A membrane-type containment system comprises a primary membrane layer, fastening engagement plates, a primary insulation layer, a secondary membrane layer and a secondary insulation layer, which are sequentially connected and fixed to a hull structure by means of penetrating fasteners, wherein the primary membrane layer, the primary insulation layer, the secondary membrane layer and the secondary insulation layer enclose to form a cryogenic liquid cargo storage tank for containing an ultra-low-temperature medium. In a planar area, the method comprises: mounting spacer plates on a bulkhead of the hull structure according to set marked lines, and mounting secondary insulation modules on the spacer plates; performing fixation by means of the penetrating fasteners; after mounting is completed, mounting the secondary membrane layer and primary insulation modules in sequence; then mounting each fastening engagement plate disposed above a gap formed by two adjacent primary insulation modules; and mounting the primary membrane layer, wherein the boundary of each primary membrane is welded and fixed to fixing welding plates and sealing metal pieces provided on the fastening engagement plates disposed on the primary insulation modules.

An ammonia treatment system according to the present invention comprises: an absorption tower that has a casing, a gas introduction part that introduces an ammonia gas that includes ammonia into the casing, a water sprinkling part that sprinkles water from an upper part of the inside of the casing and thereby absorbs the ammonia and generates ammonia water, and a water discharging part that discharges the ammonia water from a lower part of the casing; an ammonia component removal part that is provided outside the absorption tower and removes the ammonia component of the ammonia water to generate treated water; an ammonia water introduction line that introduces the ammonia water discharged from the water discharging part to the ammonia component removal part; and a first treated water supply line that supplies the treated water generated by the ammonia component removal part to the water sprinkling part.

The present invention relates to an ammonia recovery / discharge system and a control method therefor. The ammonia recovery / discharge system of the present invention is designed for a ship using ammonia as fuel and comprises: an ammonia tank; an engine; a fuel supply unit; a fuel recovery unit; an air supply line; an air discharge line; and a working fluid circulation unit, wherein the working fluid circulation unit comprises an ejector that supplies high-pressure working fluid to circulate air or ammonia in the working fluid circulation unit.

The utility model discloses an S-shaped swash plate structure of a C-shaped liquefied natural gas (LNG) ship liquid cargo tank, relates to the technical field of C-shaped LNG ship liquid cargo tanks, and is used for solving the problem of LNG sloshing in the C-shaped LNG ship liquid cargo tank. The left view of the swash plate body is S-shaped, the front view of the swash plate body is circular, an opening is formed in the swash plate body, the front view diameter of the swash plate is consistent with the inner diameter of the LNG ship liquid cargo tank, and the edge of the swash plate extends to serve as a connecting part and is connected to the tank wall of the LNG ship liquid cargo tank through bolts. Two S-shaped swash plates are arranged in the liquid cargo tank and symmetrically arranged on the inner wall of the C-shaped LNG ship liquid cargo tank, the distance between each S-shaped swash plate and the center of the LNG ship liquid cargo tank is 0.25 times of the total length of the LNG ship liquid cargo tank, and the aperture of each swash plate is 0.5 m. After the C-shaped LNG ship cargo tank oscillation suppression device is adopted, liquid is blocked by the oscillation suppression plate, oscillation is reduced, the liquid can freely flow through a small number of small holes in the oscillation suppression plate, the phenomenon that the oscillation is more violent due to liquid accumulation is avoided, and the oscillation suppression effect on the C-shaped LNG ship cargo tank is remarkable.

The invention discloses a method for preserving heat of a urea NaOH and Mg (OH) 2 storage cabin, and aims at a ship which is provided with an SCR (Selective Catalytic Reduction) system, an EGR (Exhaust Gas Recirculation) system, an iCER (Initial Continuous Emission Reduction) system and a desulfurization system and needs to store urea, NaOH or Mg (OH) 2. Condensed water of the air conditioning unit is collected and then introduced into the storage cabin in a gravity mode, and the condensed water generation amount and the condensed water temperature of the air conditioning unit are analyzed and calculated. On the premise that the cabin capacity meets the condition, condensate water is used for cooling the urea cabin and then discharged into the clean cabin bottom water cabin, and the cooling capacity of the condensate water is utilized to the maximum extent. In winter or in a cold area, when the air conditioning unit does not need to operate, in order to avoid too low temperature of the solution cabin, the storage cabin can be heated by using the discharged water in the clean cabin bottom water cabin before discharging, so that the storage temperature of the urea, NaOH or Mg (OH) 2 solution is ensured to be 10-35 DEG C.

The invention relates to a liquid cargo system of a low-pressure liquid carbon dioxide storage and transportation ship and a transfer method. The liquid cargo system comprises a low-pressure storage tank, a conveying pump, an external conveying system, a self-evaporation pressure maintaining system, an injection system, a volatile gas conveying and processing system, a liquid-phase collecting pipe, a high-pressure collecting pipe, a gas-phase collecting pipe, a gas collecting pipe, a liquid cabin inlet pipe and a liquid cabin outlet pipe. Wherein the output system is used for conveying liquid carbon dioxide to storage shore stations with different storage pressures; the self-evaporation pressure maintaining system is used for controlling the pressure in the low-pressure storage tank; the injection system is used for injecting liquid carbon dioxide of the storage shore station into the low-pressure storage tank; the volatile gas conveying and processing system is used for conveying and processing volatile gas in the process of outwards conveying or injecting carbon dioxide. Through the multi-process design, the self-evaporation pressure maintaining system and the excessive gaseous carbon dioxide liquefaction back-to-cabin process, low-pressure storage and transportation are effectively compatible with medium and high-pressure storage shore stations, and the compatibility of the ship and the operation flexibility of the ship are improved.

The present invention relates to a fuel processing system and a ship comprising the same, comprising: a fuel supply unit for supplying fuel discharged from a fuel storage tank to a demand site; a fuel recovery unit that recovers the remaining fuel returned from the demand location; and a fuel processing unit for collecting the fuel output from the fuel supply unit or the fuel recovery unit, the fuel processing unit including a plurality of absorption tanks for generating waste water by collecting the fuel with water, the fuel output from the fuel supply unit or the fuel recovery unit sequentially passes through the plurality of absorption tanks and is dissolved in water stored in the absorption tanks, thereby converting the fuel into waste water.

The present invention provides an arrangement structure of a fuel tank for cabins of a ship and electric propulsion, comprising: an electric propulsion system (110) which is arranged in an engine room (111) and provides power produced by a gas turbine (112) as a propulsion force to an electric propulsion motor; a first liquefied gas storage tank (120) which is arranged in a cargo section (A) and supplies a first gas fuel to the gas turbine (112); and a second liquefied gas storage tank (130) which is arranged in a bow section (b) and supplies a second gas fuel to the gas turbine (112), to thereby secure safety and an extra space in the engine room through the arrangement of the second liquefied gas storage tank (130) in the bow.

The invention relates to a wall (11) for a leaktight and thermally insulating vessel for storing a liquefied gas, said wall (11) comprising, in succession in a thickness direction from the outside to the inside of the vessel, a leaktight outer barrier (13), a thermally insulating barrier (14) and a leaktight inner barrier (15), the thermally insulating barrier (14) having a gas phase at an absolute pressure of less than 1 Pa and comprising:—a radiative multilayer insulation cover (47) which extends at right angles to the thickness direction, said radiative multilayer insulation cover (47) comprising a stack of a plurality of sheets which are made of metal or polymer material coated with a metal and which are separated from one another by a textile layer; and-insulating elements (51) which have an open-celled porous structure and are arranged between the radiative multilayer insulation cover (47) and the leaktight outer barrier (13).

A boil-off gas treatment system includes: a first compressor receiving boil-off gas generated from liquefied gas stored in a storage tank of a ship and compressing the boil-off gas; a second compressor compressing boil-off gas received from the storage tank; a heat exchanger cooling the boil-off gas compressed by the first compressor or the second compressor; and a refrigerant circulation line for circulating a refrigerant to the heat exchanger. The first compressor is a multistage compressor including a plurality of compressors and compressing the boil-off gas to a fuel supply pressure required for a propulsion engine. The second compressor compresses the boil-off gas to a fuel supply pressure required for a power generation engine which is lower than the propulsion engine. The boil-off gas compressed by part of the first compressor is supplied to the heat exchanger to be cooled or is supplied to the power generation engine.

The utility model discloses a mounting machine for an insulating layer in an LNG (Liquefied Natural Gas) liquid cargo containment system. The mounting machine comprises a main body part, a lifting part, a telescopic part, a pitching adjusting part, a deflection part and a mounting accessory part, wherein the main body part comprises two opposite main rods which are vertically arranged and a supporting part which is arranged at the bottoms of the main rods; the lifting part is connected between the two main rods, and the height of the lifting part is adjusted along the main rods; the telescopic part is connected to the lifting part and ascends and descends along with the lifting part, and the telescopic part stretches and retracts in the horizontal direction to be matched with the installation position. The pitching adjusting part is arranged on the telescopic part, and the pitching adjusting part is adjusted perpendicular to the telescopic direction and adjusts the pitching angle and the left-right angle so as to be matched with the installation position; the deflection part is arranged on the pitching adjusting part, and the left-right small-amplitude fine adjustment of the deflection part is realized; and the mounting accessory part is arranged on the deflection part and is connected with an insulating plate to be mounted.

The present invention provides a tank supporting structure for a hull which allows a hull having a hull outer plate and a hull inner plate disposed above the hull outer plate to support a liquefied gas tank disposed in a hold surrounded by the hull inner plate, said tank supporting structure comprising: at least one protruding deck which extends substantially horizontally from the hull inner plate toward the inside of the hold; a plurality of tank skirts which support the liquefied gas tank by being joined to the protruding deck or the hull inner plate and which include a first skirt joined to an upper surface of the protruding deck; and a plurality of skirt back reinforcing materials which reinforce joined parts of the plurality of tank skirts by being joined to the protruding deck or the hull inner plate and which include a first skirt back reinforcing material joined to a lower surface of the protruding deck.

Provided is a mounting method for a dihedral-corner-area arrangement structure of a thin-film-type enclosure system. The thin-film-type enclosure system comprises a main-layer thin film layer, a fastening attachment plate, a main-layer insulating layer, a secondary-layer thin film layer and a secondary-layer insulating layer, which are sequentially connected and fixed to a ship body structure by means of penetrating fasteners. The mounting method comprises: according to set scribe lines and on a cabin wall of the ship body structure, mounting spacer plates and studs for positioning the spacer plates for a dihedral-corner-area planar transition secondary insulating module and a dihedral-corner-area secondary insulating module in a secondary-layer dihedral corner area; and then mounting the dihedral-corner-area planar transition secondary insulating module, the dihedral-corner-area secondary insulating module and other modules. A double-layer sealed storage carrier for an ultra-low-temperature medium is effectively built, and storage and leakage-prevention problems of the ultra-low-temperature medium are solved.

The invention provides a hydrogen fuel cell power ship. The hydrogen fuel cell power ship comprises a liquid cargo storage unit, a cracking unit, a separation unit and a fuel cell unit. The liquid cargo is adopted as the basis of the fuel cell, the ship is powered through the fuel cell, and the endurance problem of the hydrogen fuel cell ship is solved. The liquid cargo on the ship is used as a raw material for power generation, raw material supply of the fuel cell can be ensured, and meanwhile zero carbon emission is achieved. Power is supplied to the ship through the fuel cell, equipment such as a main engine and an auxiliary engine of a fuel ship is replaced, the weight of the fuel cell equipment is lower than that of original fuel power system equipment such as the main engine and the auxiliary engine, the weight of an empty ship is reduced, the cabin capacity is increased, and the stability performance of the ship is optimized.

The invention discloses a gas combustion device double-wall exhaust pipe and an LNG marine gas combustion device.The gas combustion device comprises an exhaust pipe inner pipe and an exhaust pipe outer pipe, the exhaust pipe inner pipe is arranged in the exhaust pipe outer pipe, the exhaust pipe inner pipe does not make direct contact with the exhaust pipe outer pipe, a combustion chamber is arranged in the exhaust pipe inner pipe, and the combustion chamber is arranged in the exhaust pipe inner pipe; the combustion chamber is provided with a fuel gas inlet, a combustion air inlet and an exhaust hole, fuel gas enters the combustion chamber through the fuel gas inlet, combustion air enters the combustion chamber through the combustion air inlet, and waste gas generated by combustion of the fuel gas is exhausted out of the combustion chamber through the exhaust hole and enters an inner pipe of the exhaust pipe. A first cooling air inlet and a second cooling air inlet are formed in the left side and the right side of the outer exhaust pipe correspondingly. The LNG ship comprises the gas combustion device. A heat insulation layer is prevented from being laid on the outer wall of the exhaust pipe, the diameter of the outer pipe of the exhaust pipe is smaller than that of an exhaust pipe with a heat insulation layer laid in the prior art, and therefore the ship space utilization rate is increased.

The invention relates to a combined type ship independent cabin vertical limiting device which comprises a combined type vertical support, and the combined type vertical support comprises a support upper structure, a support lower structure, laminated wood and a floating stopping limiting structure. The support lower structure and the support upper structure abut against each other through laminated wood and are connected in a pulling mode through a floating-stopping limiting structure. The combined vertical support is arranged in a gap between the bottom of the independent cabin and the ship body structure; the upper end of the support upper structure is fixedly connected with the independent cabin structure, and the support lower structure is fixedly connected with the hull structure. The opposite-pull type upper and lower connecting bolts or clamping plates are additionally arranged on the vertical support at the bottom of the independent cabin, so that the function of limiting floating of the independent cabin is achieved, the structural strength of an original vertical support is utilized, additional structural reinforcement is not needed, and the steel cost is greatly saved.

A cold energy recovery facility includes a liquid hydrogen tank configured to store liquid hydrogen a first circuit configured to circulate a first working medium, a second circuit configured to circulate a second working medium having a freezing point higher than the first working medium, a first turboexpander provided in the first circuit, the first turboexpander being configured to be driven by the first working medium in a gas state, a second turboexpander provided in the second circuit, the second turboexpander being configured to be driven by the second working medium in a gas state, a first heat exchanger configured to vaporize the liquid hydrogen from the liquid hydrogen tank by heat exchange with the first working medium, a second heat exchanger configured to vaporize the first working medium in a liquid state by heat exchange with the second working medium, and a third heat exchanger configured to vaporize the second working medium in a liquid state by heat exchange with a heat medium, wherein the first circuit and the first turboexpander form a part of a first thermodynamic cycle that uses the liquid hydrogen as a low-temperature heat source in the first heat exchanger, and the second circuit and the second turboexpander form a part of a second thermodynamic cycle that uses the first working medium as a low-temperature heat source in the second heat exchanger.