CN111795294A - Cooling and buffering device used after treatment of marine BOG - Google Patents

Cooling and buffering device used after treatment of marine BOG Download PDF

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Publication number
CN111795294A
CN111795294A CN202010529564.XA CN202010529564A CN111795294A CN 111795294 A CN111795294 A CN 111795294A CN 202010529564 A CN202010529564 A CN 202010529564A CN 111795294 A CN111795294 A CN 111795294A
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CN
China
Prior art keywords
cooling
pressure
bog
chamber
heat exchange
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Pending
Application number
CN202010529564.XA
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Chinese (zh)
Inventor
陈奕瑄
解卫阔
赵超
王廷勇
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Sunrui Marine Environment Engineering Co ltd
Qingdao Sunrui Marine Environment Engineering Co Ltd
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Sunrui Marine Environment Engineering Co ltd
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Priority to CN202010529564.XA priority Critical patent/CN111795294A/en
Publication of CN111795294A publication Critical patent/CN111795294A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/005—Storage of gas or gaseous mixture at high pressure and at high density condition, e.g. in the single state phase
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/02—Use of propulsion power plant or units on vessels the vessels being steam-driven
    • B63H21/08—Use of propulsion power plant or units on vessels the vessels being steam-driven relating to steam boilers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B63H21/14—Use of propulsion power plant or units on vessels the vessels being motor-driven relating to internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0221—Fuel storage reservoirs, e.g. cryogenic tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/20—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/002—Details of vessels or of the filling or discharging of vessels for vessels under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0369—Localisation of heat exchange in or on a vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/02—Improving properties related to fluid or fluid transfer
    • F17C2260/023—Avoiding overheating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention provides a cooling and buffering device after ship BOG treatment, and relates to the technical field of environmental protection equipment. The device comprises a tank body, a partition plate and a heat exchange tube assembly, wherein the interior of the tank body is divided into a buffer cooling chamber, a medium-pressure stabilizing chamber and a low-pressure stabilizing chamber by the partition plate, and the chambers are kept communicated with each other. The buffering cooling cavity is equipped with the gaseous air inlet of BOG, and built-in drainage plate, baffle and gaseous agitator have, and noise, the vibration that the gaseous impact of BOG produced in order to alleviate the compressor can be slowed down to drainage plate and baffle, and gaseous agitator can accelerate BOG gas flow. The medium-pressure-stabilizing chamber and the low-pressure-stabilizing chamber can stabilize the air inlet pressure, and the problem of air supply pressure fluctuation of an air supply system caused by power change of air-using equipment is solved. The heat exchange tube assembly is arranged in the tank body and used for cooling high-temperature BOG gas discharged by the compressor. The invention can realize the post-cooling and pressure stabilizing processes of the gas in the BOG treatment process at the same time.

Description

Cooling and buffering device used after treatment of marine BOG
Technical Field
The invention relates to the technical field of environmental protection equipment, in particular to a cooling and buffering device for a ship BOG after treatment.
Background
With the increasing severity of the marine environmental pollution problem, the international maritime organization has put forward more strict requirements on the emission of ship exhaust gas. In order to reach the emission limit required by the regulations, shipowners also take a series of measures and technical measures, and LNG-powered ships using LNG as a ship fuel instead of diesel oil are considered to be an ideal solution. The LNG power ship is provided with a dual-fuel engine, LNG is used as a main fuel, diesel oil is used as a standby fuel, and a large amount of BOG steam can be generated in an LNG storage tank in the sailing process, so that the pressure of the storage tank is increased. The means for BOG vapor treatment in the storage tank are mainly direct discharge, reliquefaction and use as fuel. Wherein, direct discharge can cause resource loss and waste, and is hardly adopted in practice; the reliquefaction needs a separate processing module, and has complex process, higher cost and difficult implementation. However, the existing LNG power-driven ship is provided with a dual-fuel engine, and the best technical means is to use the LNG dual-fuel gas supply system to heat and pressurize BOG to be used as fuel of the engine and the boiler.
Since the BOG is low-temperature steam and the common compressor cannot tolerate low temperature, the BOG needs to be heated by the heat exchanger and then introduced into the compressor, when the compressor is just started, the power is unstable, severe vibration and noise can be generated, a buffer tank needs to be arranged at the rear, and meanwhile, the BOG can be heated rapidly by the compressor when acting, and a cooler needs to be arranged at the rear for cooling. In addition, because of the power change of the gas-using equipment, in order to keep the gas supply pressure stable, corresponding medium-pressure and low-pressure surge tanks are generally arranged in front of the GCU valve banks for air intake of the engine and the boiler respectively so as to prevent the gas supply pressure from fluctuating. At present, most suppliers of LNG dual-fuel gas supply systems adopt modularized production and installation, and as a result of using four devices, the BOG processing unit module has a large volume, and because space on a ship is limited, the installation of skid-mounted equipment on the ship is not facilitated; meanwhile, the process is complex due to the multiple devices, the design difficulty of the control system is increased, and the production and processing cost is increased invisibly.
Disclosure of Invention
The invention aims to provide a cooling and buffering device after BOG treatment for a ship, which is used for solving the problems of noise and vibration generated by a compressor in the BOG treatment process for the ship and the centralized synchronous treatment of cooling, buffering and pressure stabilization of BOG gas.
This marine BOG handles back cooling and buffer includes a jar body, baffle and heat exchange tube assembly, the baffle will the internal buffering cooling cavity, a middling pressure steady voltage cavity and a low pressure steady voltage cavity of separating into of jar, an air inlet has been seted up on the buffering cooling cavity, and compressor exhaust high temperature BOG is gaseous to be passed through the air inlet gets into buffering cooling cavity, heat exchange tube assembly locates the jar is internal, BOG gaseous with the heat exchange tube assembly in the medium carry out the heat exchange and can cool off, middling pressure steady voltage cavity reaches low pressure steady voltage cavity respectively with buffering cooling cavity intercommunication.
Further, the baffle includes a horizontal baffle and a vertical baffle, one side of horizontal baffle is the buffering cooling cavity, the opposite side of horizontal baffle is separated into by vertical baffle the middling pressure steady voltage cavity reaches the low pressure steady voltage cavity, the volume of buffering cooling cavity is than middling pressure steady voltage cavity with the low pressure steady voltage cavity is big, the volume of middling pressure steady voltage cavity with the low pressure steady voltage cavity equals.
Further, be equipped with in the buffering cooling cavity and center on a first slope drainage plate and a baffle of air inlet, one side of first slope drainage plate with the one end side of baffle links to each other, the other end side of first slope drainage plate is connected to the inner wall of the jar body, the both sides side of first slope drainage plate with leave the space between the jar body, the other end side of baffle be connected to the inner wall of the jar body and with leave the space between the jar body diapire, the both sides side of baffle is connected to the inner wall of the jar body.
Further, still be equipped with a second slope drainage plate and a gas agitator in the buffering cooling chamber, the horizontal baffle below is located to the second slope drainage plate and is kept away from air inlet department, adjacent three sides of second slope drainage plate all with the inner wall of jar body links to each other, first slope drainage plate with second slope drainage plate interval sets up and court the drainage of heat exchange tube assembly, gas agitator locates first slope drainage plate with between the second slope drainage plate, the agitator can accelerate BOG gas flow.
Furthermore, the buffer cooling chamber is also provided with a first temperature sensor, a first pressure sensor and a drain outlet arranged at the bottom of the tank body.
Furthermore, a partition plate between the buffer cooling chamber and the medium-pressure and pressure-stabilizing chamber is provided with an opening communicated with the buffer cooling chamber and the medium-pressure and pressure-stabilizing chamber.
Furthermore, an electric heater is arranged in the buffer cooling chamber and used for heating the gas in the buffer cooling chamber.
Furthermore, the medium-pressure-stabilizing chamber is also provided with a safety valve connecting pipe and a first air outlet, and the BOG gas subjected to pressure stabilization by the medium-pressure-stabilizing chamber is conveyed to the LNG dual-fuel host machine through the first air outlet.
Further, the low-pressure stabilizing chamber is connected with the buffer cooling chamber through an external connecting pipe, a pressure regulating valve, a stop valve, a second temperature sensor, a second pressure sensor and a second gas outlet are arranged on the external connecting pipe, and the BOG gas decompressed by the pressure regulating valve enters the low-pressure stabilizing chamber for pressure stabilization and then is conveyed to the LNG dual-fuel auxiliary engine or the boiler through the second gas outlet.
Further, the heat exchange tube assembly comprises a spiral heat exchange coil and a U-shaped tube communicated with the middle section of the heat exchange coil, the heat exchange coil is located in the buffer cooling cavity, a liquid inlet tube section of the U-shaped tube is located in the medium-pressure stabilizing cavity, and a liquid outlet tube section of the U-shaped tube is located in the low-pressure stabilizing cavity.
Furthermore, the heat exchange tube assembly is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet extend out of the buffer cooling cavity and the tank body.
The invention has the beneficial effects that: the device is provided with a partition plate to divide the interior of a tank body into a buffer cooling chamber, a medium-pressure stabilizing chamber and a low-pressure stabilizing chamber, wherein a heat exchange tube assembly comprising a heat exchange coil and a U-shaped tube is arranged in the tank body and is arranged in each chamber to realize the maximization of heat exchange area, the heat exchange efficiency is improved, and the heat exchange cooling effect of BOG gas is ensured; and a drainage plate and a baffle for buffering BOG gas impact force and a gas stirrer for accelerating BOG gas flow are arranged in the buffer cooling chamber.
Through the action of the buffer cooling chamber, the internal drainage plate and the baffle plate, the vibration and noise generated by unstable power in the initial operation stage of the compressor are reduced, and the compressor can stably operate; the gas stirrer can accelerate the BOG gas flow and accelerate heat exchange, and the drainage plate and the baffle plate can prevent gas vibration generated by the gas stirrer from directly acting on the heat exchange tube assembly; the medium-pressure stabilizing cavity and the low-pressure stabilizing cavity can stabilize the air inlet pressure of BOG gas transmitted to the LNG dual-fuel main engine and the LNG dual-fuel auxiliary engine, and the problem of air supply pressure fluctuation of an air supply system caused by power change of gas equipment is prevented.
On the whole optimization and improvement, the effect that one device integrates the functions of multiple existing devices is achieved, the size of a BOG processing unit module is effectively reduced, the using space of the devices on the ship is saved, the devices are convenient to install, and the manufacturing cost is reduced.
Drawings
FIG. 1 is a schematic view of the internal structure of the cooling buffer device of the present invention.
Fig. 2 is a schematic cross-sectional view taken along direction a in fig. 1.
Fig. 3 is a schematic cross-sectional view taken along the direction B in fig. 1.
In the figure of the invention: 1-tank body, 101-buffer cooling chamber, 102-medium pressure stabilizing chamber, 103-low pressure stabilizing chamber, 2-heat exchange tube assembly, 201-heat exchange coil, 202-U-shaped tube, 203-liquid inlet, 204-liquid outlet, 3-clapboard, 301-horizontal clapboard, 302-vertical clapboard, 303-hole, 4-external connecting tube, 401-pressure regulating valve, 402-stop valve, 501-first inclined flow guiding plate, 502-second inclined flow guiding plate, 6-baffle, 7-gas stirrer, 8-gas inlet, 901-first gas outlet, 902-second gas outlet, 10-sewage outlet, 11-first temperature sensor, 12-second temperature sensor, 13-first pressure sensor, 3-heat exchange tube assembly, 2-heat exchange tube, 3-liquid outlet, 3-clapboard, 3-horizontal clapboard, 302-vertical clapboard, 303-hole, 14-second pressure sensor, 15-electric heater, 16-safety valve connection pipe.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The terms first, second, third, fourth and the like in the description and in the claims of the present invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Referring to fig. 1, the tank 1 is partitioned into a buffer cooling chamber 101, an intermediate pressure stabilizing chamber 102 and a low pressure stabilizing chamber 103 by a partition plate 3, which are in communication with each other, and the partition plate 3 includes a horizontal partition plate 301 partitioning the buffer cooling chamber 101 from the intermediate pressure stabilizing chamber 102 and the low pressure stabilizing chamber 103, and a vertical partition plate 302 partitioning the intermediate pressure stabilizing chamber 102 from the low pressure stabilizing chamber 103. The buffer cooling chamber 101 is communicated with the medium-pressure stabilizing chamber 102 through an opening 303 on the horizontal partition plate 301, and the buffer cooling chamber 101 is communicated with the low-pressure stabilizing chamber 103 through an external connecting pipe 4. Utilize baffle 3 to separate into three big cavities with jar body 1, play effectual buffering effect to the BOG gas of introducing, inlet pressure can be stabilized to middling pressure steady voltage cavity 102 and low pressure steady voltage cavity 103, prevents to cause the problem of gas supply system air feed pressure fluctuation because of gas-using equipment power changes. The heat exchange tube component 2 is arranged in the tank body 1, and the heat exchange tube component 2 is used for exchanging heat with BOG gas through a built-in medium, so that the BOG gas can be cooled. The heat exchange tube assembly 2 comprises a spiral heat exchange coil 201 and a U-shaped tube 202 communicated with the middle section of the heat exchange coil 201. The heat exchange coil 201 is located in the buffer cooling chamber 101, a liquid inlet pipe section of the U-shaped pipe 202 is located in the medium-pressure stabilizing chamber 102, and a liquid outlet pipe section of the U-shaped pipe 202 is located in the low-pressure stabilizing chamber 103. The purpose of the design of the heat exchange tube assembly 2 is to maximize the BOG gas heat exchange area, improve the heat exchange efficiency, guarantee the BOG gas heat exchange cooling effect, and enable the device to realize the gas after-cooling and buffering process in the BOG treatment process at the same time.
A first temperature sensor 11, a first pressure sensor 13 for temperature and pressure monitoring and an electric heater 15 for heating the gas in the buffer cooling chamber 101 when the ship is in the cold winter sea area are arranged in the buffer cooling chamber 101. The external connection pipe 4 is provided with a pressure regulating valve 401 for regulating the pressure of the BOG gas, a stop valve 402 for stopping the gas flow, a second temperature sensor 12 and a second pressure sensor 14 for monitoring the temperature and the pressure of the BOG gas in the low-pressure stabilizing chamber 103. Referring to fig. 2, the medium-pressure-stabilizing chamber 102 is provided with a safety valve connecting pipe 16 and a first gas outlet 901, the BOG gas pressure-stabilized by the medium-pressure-stabilizing chamber 102 is delivered to the LNG dual-fuel main engine through the first gas outlet 901, the low-pressure-stabilizing chamber 103 is provided with a second gas outlet 902, and the second gas outlet 902 is used for delivering the BOG gas pressure-stabilized by the pressure-regulating valve 401 and entering the low-pressure-stabilizing chamber 103 to the LNG dual-fuel auxiliary engine or boiler through the second gas outlet 902.
Referring to fig. 1 and 3, the buffer cooling chamber 101 is provided with an air inlet 8 for introducing BOG gas, the side wall of the buffer cooling chamber 101 is further fixed with a first inclined drainage plate 501, a second inclined drainage plate 502, a baffle 6 and a gas stirrer 7, the second inclined drainage plate 502 is arranged above the first inclined drainage plate 501, the gas stirrer 7 is arranged between the two drainage plates, the baffle 6 is fixedly connected to one end of the bottom of the first inclined drainage plate 501, two sides of the first inclined drainage plate 501 and a gap is reserved between the tank body 1, the other end of the baffle 6 is connected to the inner wall of the tank body 1 and the bottom wall of the tank body 1, the gap is reserved for allowing BOG gas to flow out after being buffered, and the two sides of the baffle 6 are connected to the inner wall of the tank body 1. The effect that sets up first slope drainage plate 501, second slope drainage plate 502 and baffle 6 can slow down the gaseous impact force of BOG and alleviate noise, the vibration that the compressor produced, simultaneously gas agitator 7 can accelerate the gaseous flow of BOG for the heat transfer.
First embodiment
Referring to fig. 1 and fig. 3, which are schematic diagrams of the internal structure of the cooling buffer device of the present invention, during operation, the seawater pump is first turned on to allow seawater coolant to flow into the device from the liquid inlet 203 and then flow out from the liquid outlet 204, and then the compressor is turned on. The high-temperature BOG gas discharged by the compressor through work enters the buffering cooling chamber 101 through the air inlet 8 and directly acts on the first inclined flow guide plate 501, and impacts on the baffle 6 after being downwards guided and buffered by the first inclined flow guide plate 501. The gaseous gap of partly through baffle 6 below of BOG after the buffering flows, and partly flows to near heat exchange coil 201 through the gap of second slope drainage plate 502 both sides, has alleviateed the vibration and the noise that the operation initial stage compressor produced, guarantees that the compressor can the even running. Open gas agitator 7 after compressor power is stable, gas agitator 7 can accelerate BOG gaseous mobility, promote heat exchange efficiency, because the existence of first slope drainage plate 501 and second slope drainage plate 502, gaseous can not directly gush into middling pressure buffer cavity 102 by trompil 303 on the horizontal partition plate 301 around the gas agitator 7, but is carried out the heat exchange and realizes the cooling effect near the heat exchange coil 201 that is led to heat exchange tube assembly and the built-in medium of heat exchange coil 201.
Referring to fig. 2, the medium-pressure stabilizing chamber 102 and the low-pressure stabilizing chamber 103 are equally separated by the vertical partition 302, and the cooled BOG gas enters the medium-pressure stabilizing chamber through the opening 303 to be stabilized, and finally enters the LNG dual-fuel host through the first gas outlet 901. The low-pressure stabilizing chamber 103 is communicated with the buffer cooling chamber 101 through an external connecting pipe 4, the external connecting pipe 4 is provided with a pressure regulating valve 401, a stop valve 402, a second temperature sensor 12, a second pressure sensor 14 and a second gas outlet 902, BOG gas enters the low-pressure stabilizing chamber 103 for pressure stabilization after being decompressed through the pressure regulating valve 401 through the external connecting pipe 4 connected to the side wall of the tank body 1, and finally LNG dual-fuel auxiliary machines and boilers are introduced into the low-pressure stabilizing chamber 103 through the second gas inlet 902 to serve as fuels.
Meanwhile, the side wall of the buffer cooling chamber 101 of the device is provided with the first pressure sensor 11 and the first temperature sensor 12, and the temperature and the pressure of the buffer cooling chamber 101 and the medium-pressure stabilizing chamber 102 are monitored. The electric heater 15 arranged on the side wall of the buffer cooling chamber 101 is turned on when the ship sails in some cold sea areas in winter, and the main function is to prevent the temperature of the cooled BOG gas from being lower than the air intake requirement of the engine and the boiler due to the low temperature of the seawater. The lower end socket of the buffer cooling cavity is provided with a sewage draining outlet 10 used in a cleaning tank, and the medium-pressure stabilizing cavity 102 is also provided with a safety valve connecting pipe 16 externally connected with a safety valve so as to ensure the safe operation of the equipment. This technical scheme reaches the effect that a equipment has gathered current many equipment functions on whole optimization improves, realizes heat transfer area maximize, improves heat exchange efficiency, guarantees the gaseous heat transfer cooling effect of BOG, effectively reduces the volume of BOG processing unit module simultaneously, has saved the usage space of equipment on the ship, and the installation of the equipment of being convenient for has reduced manufacturing cost.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (11)

1. The utility model provides a marine BOG handles back cooling and buffer holds concurrently, a serial communication port, marine BOG handles back cooling and buffer holds concurrently includes a jar body, baffle and heat exchange tube assembly, the baffle will the internal buffering cooling cavity, a middling pressure stabilizing cavity and a low pressure stabilizing cavity of separating into of jar, an air inlet has been seted up on the buffering cooling cavity, and compressor exhaust high temperature BOG is gaseous warp the air inlet gets into buffering cooling cavity, heat exchange tube assembly locates the jar is internal, BOG is gaseous with the medium carries out the heat exchange and can cool off in the heat exchange tube assembly, middling pressure stabilizing cavity reaches low pressure stabilizing cavity respectively with buffering cooling cavity intercommunication.
2. The BOG post-processing cooling and buffering device for ships according to claim 1, wherein the partition comprises a horizontal partition and a vertical partition, one side of the horizontal partition is the buffering cooling chamber, the other side of the horizontal partition is divided into the medium-pressure stabilizing chamber and the low-pressure stabilizing chamber by the vertical partition, the buffering cooling chamber has a larger volume than the medium-pressure stabilizing chamber and the low-pressure stabilizing chamber, and the medium-pressure stabilizing chamber and the low-pressure stabilizing chamber have the same volume.
3. The marine BOG processing after-cooling and buffering device according to claim 1, wherein a first inclined flow guide plate and a baffle are disposed in the buffer cooling chamber, the first inclined flow guide plate surrounds the air inlet, one end of the first inclined flow guide plate is connected to one end of the baffle, the other end of the first inclined flow guide plate is connected to the inner wall of the tank, a gap is left between two sides of the first inclined flow guide plate and the tank, the other end of the baffle is connected to the inner wall of the tank and the bottom wall of the tank, and two sides of the baffle are connected to the inner wall of the tank.
4. The marine BOG treatment post-cooling and cushioning device according to claim 3, further comprising a second inclined flow guide plate and a gas agitator disposed in the cushioning cooling chamber, wherein the second inclined flow guide plate is disposed below the horizontal partition plate and away from the air inlet, three adjacent sides of the second inclined flow guide plate are connected to the inner wall of the tank body, the first inclined flow guide plate and the second inclined flow guide plate are disposed at an interval and guide flow towards the heat exchange tube assembly, and the gas agitator is disposed between the first inclined flow guide plate and the second inclined flow guide plate.
5. The marine BOG processing after-cooling and buffering device according to claim 1, wherein the buffer cooling chamber further comprises a first temperature sensor, a first pressure sensor, and a drain opening formed at the bottom of the tank.
6. The marine BOG processing after-cooling and buffering device according to claim 1, wherein an opening communicating the buffer cooling chamber and the medium-pressure and pressure-stabilizing chamber is formed in a partition plate between the buffer cooling chamber and the medium-pressure and pressure-stabilizing chamber.
7. The marine BOG process after-cooling and buffering device of claim 1, wherein an electric heater is disposed in the buffer cooling chamber for heating the gas in the buffer cooling chamber.
8. The marine BOG process after-cooling and buffering device of claim 1, wherein the medium pressure chamber further comprises a safety valve connection tube and a first air outlet.
9. The marine BOG processing after-cooling and buffering device according to claim 1, wherein the low-pressure and pressure-stabilizing chamber is connected to the buffering and cooling chamber through an external connection pipe, and a pressure regulating valve, a shut-off valve, a second temperature sensor, a second pressure sensor, and a second air outlet are provided on the external connection pipe.
10. The cooling and buffering device after processing of BOG for ship of claim 1, wherein the heat exchange tube assembly comprises a spiral heat exchange coil and a U-shaped tube connected to the middle section of the heat exchange coil, the heat exchange coil is located in the buffering and cooling chamber, the liquid inlet tube section of the U-shaped tube is located in the medium-pressure stabilizing chamber, and the liquid outlet tube section of the U-shaped tube is located in the low-pressure stabilizing chamber.
11. The marine BOG processing after-cooling and buffering device of claim 1, wherein the heat exchange tube assembly has a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet extending from the buffer cooling chamber out of the tank.
CN202010529564.XA 2020-06-11 2020-06-11 Cooling and buffering device used after treatment of marine BOG Pending CN111795294A (en)

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