CN106969258B - A kind of integrated form central fluid gasifier - Google Patents
A kind of integrated form central fluid gasifier Download PDFInfo
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- CN106969258B CN106969258B CN201710227299.8A CN201710227299A CN106969258B CN 106969258 B CN106969258 B CN 106969258B CN 201710227299 A CN201710227299 A CN 201710227299A CN 106969258 B CN106969258 B CN 106969258B
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- natural gas
- central fluid
- shell
- fluid
- superheater
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Classifications
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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
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied 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
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention designs a kind of integrated form central fluid gasifier with expanding machine, the present invention includes intermediate fluid loop path and natural gas transportation path, the intermediate fluid loop path includes along the sequentially connected condenser in central fluid flowing direction, circulating pump, vaporizer-superheater and central fluid expander, and the natural gas transportation path is sequentially through the condenser, vaporizer-superheater and natural gas expander；The circulating pump is pressurized for central fluid, the central fluid expander is depressurized for central fluid, the condenser utilizes central fluid by liquefied natural gas heating and gasifying, the vaporizer-superheater is using heat source fluid by central fluid and heated by natural gas to realize that the central fluid gasification and the heating again of natural gas, the natural gas expander are depressured for natural gas.Vaporizer-superheater inner tube plate thickness can be thinned in the present invention, cancel the components such as lagging facility, pressure reducing valve, and realizes that energy regenerating utilizes.
Description
Technical field
The present invention relates to central fluid gasifiers, are specifically related to a kind of integrated form central fluid gasification with expanding machine
Device.
Background technique
Natural gas is a kind of important clean energy resource, it usually needs is contained in appearance as liquid under very high pressure condition
It is stored and is transported in device or pipeline, the natural gas of this liquid is known as liquefied natural gas.Liquefied natural gas can not be direct
It is used as fuel by industry or civil applications equipment, using before needing to heat it using heat source, it is made to become gaseous state
Natural gas, this process be known as vaporize or gasification.The industrial equipment that can be realized liquefied natural gas vaporization is known as vaporizer.
Vaporizer with central fluid is a kind of typical natural gas vaporizer type.This vaporizer is in heat source and naturally
Central fluid is introduced between gas, avoids and directly carries out heat exchange between heat source and natural gas, and there is very efficient vaporization
Performance, the gasifier structure of conventional belt central fluid using the higher fluid of temperature (such as seawater) as heat source as shown in Figure 1, add
Hot central fluid (such as propane), and by central fluid heats liquefied natural gas, wherein central fluid is encapsulated in closed container
Portion；The closed container is the shell space of vaporizer main body.Specific gasification are as follows: in the closed container bottom heat exchanger 2
Heat source deliver heat to liquid central fluid 2b, and be allowed to become gaseous medium flow body 2a, subsequent gaseous medium flow body 2a
The closed container top is risen to, the natural gas in closed container top heat exchanger 1 is delivered heat to, completes the gas of natural gas
Change process；According to the difference required product natural gas process, another section of heat transfer space usually can be also set again, after making gasification
Heat source fluid of the natural gas in shell side space with heat exchanger tube preferentially exchanges heat, and natural gas temperature is made to further rise to satisfaction
It is required that this section of heat transfer space is known as superheater 3.According to the difference of structure, superheater 3 can be connected as one with vaporizer main body
Body (as shown in Figure 1), or (as shown in Figure 2) is placed in except vaporizer main body separately as a heat exchanger.
As a kind of traditional vaporizer with central fluid, vaporizer main body generallys use heat source (such as seawater), centre
Three kinds of media of fluid (such as propane) and natural gas carry out heat in same housing space and intercourse so that process be related to it is numerous
Complicated heat-transfer mechanism increases the dual difficulty of technological design and structure design；Its 3 shell side of superheater needs to bear natural
Huge pressure difference between air and heat source (such as seawater) causes tube plate thickness in superheater 3 excessive, had both increased metal cost, simultaneously
There is also the hidden danger of sealing, safety etc.；The operation temperature of central fluid is generally below zero degree, need to gasifier main body into
Row isothermal holding, increases equipment cost；The product natural gas that superheater 3 exports need to subtract since pressure is very high by pressure reducing valve
Pressure just can enter pipeline, further increase cost.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of integrated form central fluid gasifier with expanding machine.
In order to achieve the object of the present invention, the invention adopts the following technical scheme:
A kind of integrated form central fluid gasifier, including intermediate fluid loop path and natural gas transportation path, it is described
Intermediate fluid loop path include along the sequentially connected condenser in central fluid flowing direction, circulating pump, vaporizer-superheater and
Central fluid expander, the natural gas transportation path are expanded sequentially through the condenser, vaporizer-superheater and natural gas
Device；The circulating pump is pressurized for central fluid, and the central fluid expander is depressurized for central fluid, the condenser benefit
With central fluid by liquefied natural gas heating and gasifying, the vaporizer-superheater is divided central fluid and natural gas using heat source fluid
It Jia Re not be to realize that the central fluid gasification and the heating again of natural gas, the natural gas expander are dropped for natural gas
Pressure.
Further, tube side partition is equipped in the vaporizer-superheater, the tube side partition divides vaporizer-superheater shell
For shell side shell and tube side shell, the shell side shell is interior to be equipped with parallel with tube side partition and shell side shell is divided into natural gas
The shell side partition of shell and central fluid shell, in the vaporizer-superheater heat-exchanging tube bundle extend vertically through the shell side partition with
The tube side partition and heat-exchanging tube bundle is connected to the tube side shell.
Further, the central fluid expander cooperates corresponding power-equipment to realize that the recycling of central fluid energy is sharp
With the natural gas expander cooperates the recycling of corresponding power-equipment realization natural gas energy.
Further, the natural gas enters thermosistor after the decompression of natural gas expander, and the thermosistor is used for day
Right temperature degree is adjusted to user's pipe network required temperature.
Further, the natural gas shell is equipped with gas inlet, gas outlet, on the central fluid shell
It is exported equipped with central fluid entrance, central fluid, the tube side shell is equipped with heat source fluid entrance, heat source fluid exports.
Further, the central fluid shell is close to tube side partition, and the natural gas shell is far from tube side partition.
The beneficial effects of the present invention are:
(1) central fluid of the present invention forms low pressure central fluid after condensing heat release from central fluid condenser, leads to
It crosses the circulating pump to complete to be pressurized and form high pressure central fluid, subsequently enters the vaporizer-superheater and absorb heat source fluid heat
Evaporation is completed afterwards and becomes gaseous state, and gaseous high pressure central fluid externally exports energy, pressure drop by the central fluid expanding machine
It is low, circuit cycle is completed into the condenser.In traditional band central fluid gasifier structure, central fluid needs are maintained
Lower phase-change heat transfer temperature, it is therefore desirable to which additional heat preservation is arranged.And in the present invention, central fluid need to pass through different heat transfers
Stage, operating temperature can be set relatively high, therefore are not necessarily to isothermal holding to relevant device and pipeline, save equipment fortune
Row investment.Structure of the invention is easily designed, and safety in operation is high.
(2) vaporizer-superheater of the present invention is using double diaphragm structures, between parallel specially in vaporizer-superheater shell side
Every arrangement shell side partition and tube side partition, equipment is made to be axially formed natural gas shell and central fluid shell along heat-exchanging tube bundle,
The vaporizer-superheater, which has, makes heat source fluid to the function of natural gas, central fluid while heating.Traditional band central fluid gas
Change in device structure, temperature adjusting (see Fig. 1, Fig. 2) is often carried out to natural gas using superheater, the natural gas of high pressure walks superheater
Shell side leads to the tube side partition for being located at shell side both ends in superheater due to pressure difference huge between natural gas and heat source fluid
Thickness needs very big.And in the present invention, due to the set-up mode of double partitions, and the central fluid is realized by circulating pump
The pressure difference of two side liquid of plate body of pressurization, the shell side partition and tube side partition accordingly reduces, the design side based on pressure difference
Method, which to be located at the thickness of shell side partition and tube side partition in vaporizer-superheater, to be substantially reduced, and equipment weight is effectively reduced
Amount, and make that seal request is reduced in vaporizer-superheater and security performance gets a promotion, equipment operating cost greatly reduces.
(3) present invention cooperates corresponding power to set by the central fluid expander while being depressured to central fluid
The standby recycling that central fluid energy may be implemented, the natural gas expander cooperate accordingly while being depressured to natural gas
Power-equipment the recycling of natural gas energy may be implemented, i.e., the present invention has the function that energy regenerating utilizes.
(4) natural gas of the present invention carries out temperature adjustment by thermosistor again after the decompression of natural gas expander, i.e.,
User's pipe network can be directly entered, without being arranged relief valve component on the output channel of gasification natural gas, equipment operating cost into
One step is reduced.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of conventional belt central fluid gasifier.
Fig. 2 is another arrangement schematic diagram of conventional belt central fluid gasifier.
Fig. 3 is the integrated form intermediate fluid type gasifier structural schematic diagram of the invention with expanding machine.
Fig. 4 is the integrated form intermediate fluid type gasifier another kind arrangement schematic diagram of the invention with expanding machine.
Fig. 5 is the double tubesheet vaporizer-superheater structural representation that the present invention uses.
Fig. 1, the meaning of appended drawing reference is as follows in 2:
Heat exchanger；3- superheater；2a- gaseous medium flow body；2b- liquid central fluid.
The meaning of appended drawing reference is as follows in Fig. 3,4,5:
1- vaporizer-superheater；1a- natural gas shell；1b- central fluid shell；1c- tube side shell；11a- shell side partition；
11b- tube side partition；11c- heat-exchanging tube bundle；High pressure central fluid；2- central fluid expanding machine；3- condenser；30/31-
Low pressure central fluid；4- circulating pump；5- Natural gas expander；6- thermosistor.
Specific embodiment
More specific detail is made to technical solution of the present invention below with reference to embodiment:
As in Figure 3-5: the present invention includes intermediate fluid loop path and natural gas transportation path, the central fluid
Circulating path includes along the sequentially connected condenser 3 in central fluid flowing direction, circulating pump 4, vaporizer-superheater 1 and intermediate flow
Body expander 2, the natural gas transportation path is sequentially through the condenser 3, vaporizer-superheater 1 and natural gas expander 5；
The circulating pump 4 is pressurized for central fluid, and the central fluid expander 2 is depressurized for central fluid, 3 benefit of condenser
With central fluid by liquefied natural gas heating and gasifying, the vaporizer-superheater 1 utilizes heat source fluid by central fluid and natural gas
Heating is to realize that the central fluid gasification and the heating again of natural gas, the natural gas expander 5 are dropped for natural gas
Pressure.
It is equipped with tube side partition 11b in the vaporizer-superheater 1,1 shell of vaporizer-superheater is divided by the tube side partition 11b
Shell side shell and tube side shell 1c, the shell side shell is interior to be equipped with parallel with tube side partition 11b and shell side shell is divided into day
The shell side partition 11a of right gas shell 1a and central fluid shell 1b, heat-exchanging tube bundle 11c is vertically passed through in the vaporizer-superheater 1
The shell side partition 11a is worn with tube side partition 11b and the heat-exchanging tube bundle 11c is connected to the tube side shell 1c.The evaporation
Superheater 1 is when in use: the pressure P1 of natural gas is greater than intermediate in the central fluid shell 1b in the natural gas shell 1a
Fluid pressure P2, the intermediate fluid pressure P2 is greater than the tube side shell 1c inner heat source Fluid pressure P3, so that described
The pressure difference of two side liquid of plate body of shell side partition 11a and tube side partition 11b accordingly reduces, and the design method based on pressure difference makes
Obtaining can substantially reduce positioned at the thickness of shell side partition 11a and tube side partition 11b in vaporizer-superheater 1, be effectively reduced equipment
Weight, and make that seal request is reduced in vaporizer-superheater 1 and security performance gets a promotion, equipment operating cost subtracts significantly
It is few.
The central fluid expander 2 cooperates the recycling of corresponding power-equipment realization central fluid energy, described
Natural gas expander 5 cooperates the recycling of corresponding power-equipment realization natural gas energy.
The natural gas enters thermosistor 6 after the decompression of natural gas expander 5, and the thermosistor 6 is used for natural temperature
Degree is adjusted to user's pipe network required temperature.
The intermediate fluid loop path: the intermediate fluid loop path includes low-pressure section and high-pressure section, described
Central fluid condenses heat release in the condenser 3, then completes pressurization by the circulating pump 4 and forms high pressure central fluid,
It enters back into after the vaporizer-superheater 1 absorbs heat source fluid heat and completes evaporation, it is then right by the central fluid expanding machine 2
Outer output energy, pressure reduction simultaneously form low pressure central fluid, enter the condenser 3 later and complete circuit cycle.
The heat source transport path: heat source fluid was evaporated by the heat-exchanging tube bundle 11c of the vaporizer-superheater 1 with described
High pressure central fluid in natural gas and central fluid shell side 1b in the natural gas shell side 1a of hot device 1 carries out heat exchange.
The natural gas transportation path: the natural gas enters evaporation overheat after the 3 tube side endothermic gasification of condenser
Device 1, the natural gas after the vaporizer-superheater 1 further heating are real after the output of the Natural gas expander 5 external energy
Existing pressure reduction, is adjusted to suitable temperature through thermosistor 6 and enters user's pipe network, without in gasification natural gas in the transport path
Pressure reducing valve is set on output channel.
Claims (4)
1. a kind of integrated form central fluid gasifier, it is characterised in that: including intermediate fluid loop path and natural gas transportation
Path, the intermediate fluid loop path include along central fluid flowing the sequentially connected condenser in direction (3), circulating pump (4),
Vaporizer-superheater (1) and central fluid expander (2), the natural gas transportation path is sequentially through the condenser (3), steaming
Send out superheater (1) and natural gas expander (5)；The circulating pump (4) is pressurized for central fluid, the central fluid expansion
Device (2) is depressurized for central fluid, and the condenser (3) utilizes central fluid by liquefied natural gas heating and gasifying, the evaporation
Superheater (1) is heated central fluid and natural gas using heat source fluid respectively to realize the central fluid gasification and natural
The heating again of gas, the natural gas expander (5) are depressured for natural gas；
Tube side partition (11b) is equipped in the vaporizer-superheater (1), the tube side partition (11b) is by vaporizer-superheater (1) shell
It is divided into shell side shell and tube side shell (1c), is equipped in the shell side shell parallel with tube side partition (11b) and by shell side shell
Body is divided into the shell side partition (11a) of natural gas shell (1a) and central fluid shell (1b), changes in the vaporizer-superheater (1)
Heat pipe bundle (11c) extend vertically through the shell side partition (11a) and tube side partition (11b) and the heat-exchanging tube bundle (11c) with it is described
Tube side shell (1c) connection；
The central fluid shell (1b) is close to tube side partition (11b), and the natural gas shell (1a) is far from tube side partition
(11b)。
2. integrated form central fluid gasifier as described in claim 1, it is characterised in that: the central fluid expander (2)
Corresponding power-equipment is cooperated to realize that the recycling of central fluid energy, natural gas expander (5) cooperation are corresponding dynamic
The recycling of power equipment realization natural gas energy.
3. integrated form central fluid gasifier as described in claim 1, it is characterised in that: the natural gas is expanded through natural gas
Enter thermosistor (6) after device (5) decompression, the thermosistor (6) is for adjusting natural gas temperature to user's pipe network required temperature.
4. integrated form central fluid gasifier as described in claim 1, it is characterised in that: set on the natural gas shell (1a)
There are gas inlet, gas outlet, the central fluid shell (1b) is equipped with central fluid entrance, central fluid exports,
The tube side shell (1c) is equipped with heat source fluid entrance, heat source fluid exports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710227299.8A CN106969258B (en) | 2017-04-10 | 2017-04-10 | A kind of integrated form central fluid gasifier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710227299.8A CN106969258B (en) | 2017-04-10 | 2017-04-10 | A kind of integrated form central fluid gasifier |
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| CN106969258A CN106969258A (en) | 2017-07-21 |
| CN106969258B true CN106969258B (en) | 2019-08-20 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295646A (en) * | 1998-03-27 | 2001-05-16 | 埃克森美孚上游研究公司 | Producing power from pressurized liquefied natural gas |
| CN1319739A (en) * | 2000-01-18 | 2001-10-31 | 株式会社神户制钢所 | Intermediate fluid type carburetor |
| CN201811613U (en) * | 2010-09-29 | 2011-04-27 | 中原工学院 | Dual-heat source multi-shell pass countercurrent speed-increasing type shell-and-tube heat exchanger |
| CN206071658U (en) * | 2016-08-31 | 2017-04-05 | 航天晨光股份有限公司 | A kind of LNG cold energy utilization system |
-
2017
- 2017-04-10 CN CN201710227299.8A patent/CN106969258B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295646A (en) * | 1998-03-27 | 2001-05-16 | 埃克森美孚上游研究公司 | Producing power from pressurized liquefied natural gas |
| CN1319739A (en) * | 2000-01-18 | 2001-10-31 | 株式会社神户制钢所 | Intermediate fluid type carburetor |
| CN201811613U (en) * | 2010-09-29 | 2011-04-27 | 中原工学院 | Dual-heat source multi-shell pass countercurrent speed-increasing type shell-and-tube heat exchanger |
| CN206071658U (en) * | 2016-08-31 | 2017-04-05 | 航天晨光股份有限公司 | A kind of LNG cold energy utilization system |
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| Publication number | Publication date |
|---|---|
| CN106969258A (en) | 2017-07-21 |
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Address after: 230031 No. 888 Changjiang West Road, Shushan District, Hefei, Anhui. Applicant after: Hefei General Machinery Research Institute Co., Ltd. Address before: 230031 No. 888 Changjiang West Road, Shushan District, Hefei, Anhui. Applicant before: Hefei Universal Machinery Inst. |
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