CN205753443U - A kind of distributed busbar protection being applied to LNG liquefaction plant - Google Patents
A kind of distributed busbar protection being applied to LNG liquefaction plant Download PDFInfo
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- CN205753443U CN205753443U CN201620421307.3U CN201620421307U CN205753443U CN 205753443 U CN205753443 U CN 205753443U CN 201620421307 U CN201620421307 U CN 201620421307U CN 205753443 U CN205753443 U CN 205753443U
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- heat
- flue gas
- liquefaction plant
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- heat exchanger
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- 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
- Y02T10/12—Improving ICE efficiencies
Abstract
The distributed busbar protection of a kind of LNG of being applied to liquefaction plant belongs to LNG liquefaction plant technical field of energy utilization, it includes that power generation part, jacket water UTILIZATION OF VESIDUAL HEAT IN part and fume afterheat utilize part, power generation part includes mains electricity input end, gas internal combustion electric generator group (1), low voltage electric network (10) and 10.5KV high-voltage fence (12), jacket water UTILIZATION OF VESIDUAL HEAT IN part includes domestic hot-water's heat exchanger (3), heating heat exchanger (4) and low temperature exhaust heat ORC screw rod generating set (5), and fume afterheat utilization part includes flue gas heat-conducting oil furnace (2) and flue gas heat-exchange unit (6).This utility model utilizes combined generating system, not only energy ladder utilizes, preferably solve the problem that existing LNG liquefaction plant energy utilization rate is low, power consumption big, electricity price cost is high and operating cost is high, fundamentally solve LNG liquefaction plant production cost, this energy source station generating efficiency is high, system economy is good, clean environmental protection.
Description
Technical field
This utility model belongs to LNG(liquefied natural gas liquefied natural gas) liquefaction plant technical field of energy utilization, it is specifically related to a kind of distributed busbar protection being applied to LNG liquefaction plant.
Background technology
Along with national economy high speed development is to the demand of clean energy resource and the reinforcement day by day to environmental protection, China is increasing to LNG demand.The Chinese government using gas utilization as Optimization of Energy Structure, the major measure of improving atmospheric environment, encourage development liquefied natural gas project.According to both at home and abroad about the prediction of energy research mechanism, by 2013, in world's primary energy structure, the proportion shared by oil would fall to less than 40%, and coal will drop to 22%, and the consumption ratio shared by natural gas will account for 26%.To the year two thousand thirty, the volume of production of natural gas and consumption figure all will can exceed oil, and likely replacement oil becomes main energy sources, it may be said that this century will be the century of natural gas.So the construction of LNG liquefaction plant is seemingly emerged rapidly in large numbersBamboo shoots after a spring rain, emerge in an endless stream.
Owing to LNG liquefaction plant equipment is many to amount of energy consumption, the electricity of needs is big, causes production cost high, thus increase user use gas price lattice, and cause electrical network burden to increase, add the consumption of fire coal, exacerbate the pollution of environment, so the LNG liquefaction plant that changes the status quo is the task of top priority with power mode.Distributed energy technology is employing natural gas clean energy resource, reduces the discharge of environmental contaminants, reduces the loss of energy conveying process, expands energy cascade utilization scope, is a kind of efficient, reliable, user side energy utilization system of environmental protection.Owing to LNG liquefaction plant has convenience, utilizing the cheap advantage of Gas Prices, distributed busbar protection energy cost is low, output electricity price cost is than the electricity price low cost of utility grid, reduce the operating cost of liquefaction plant, it is seen then that LNG liquefaction plant is especially suitable for the construction of Distribution of Natural formula energy source station.
Summary of the invention
In order to solve the problem that existing LNG liquefaction plant energy utilization rate is low, power consumption is big and operating cost is high, fundamentally solve LNG liquefaction plant production cost, this utility model a kind of generating efficiency of offer is high, system economy is good, the distributed busbar protection being applied to LNG liquefaction plant of clean environmental protection, this energy source station can alleviate electrical network burden to greatest extent, saves the energy.
The technical scheme that this utility model solution technical problem is taked is as follows:
A kind of distributed busbar protection being applied to LNG liquefaction plant, part is utilized including power generation part, jacket water UTILIZATION OF VESIDUAL HEAT IN part and fume afterheat, it is characterized in that, described power generation part includes mains electricity input end, gas internal combustion electric generator group, low voltage electric network and high-voltage fence, described jacket water UTILIZATION OF VESIDUAL HEAT IN part includes domestic hot-water's heat exchanger, heating heat exchanger and low temperature exhaust heat ORC(organic Rankine bottoming cycle Organic Rankine Cycle) screw rod generating set, described fume afterheat utilization part includes flue gas heat-conducting oil furnace and flue gas heat-exchange unit；The entrance point of gas internal combustion electric generator group is connected with gas distributing system, and the high-temperature flue gas port of export of gas internal combustion electric generator group is connected with the arrival end of flue gas heat-conducting oil furnace；The port of export of the jacket water of jet dynamic control divides three tunnels: a road is supplied the arrival end of heating heat exchanger and is connected with winter, and a road is connected with the arrival end of supply domestic hot-water's heat exchanger, and a road is connected with the arrival end of low temperature exhaust heat ORC screw rod generating set；The port of export of flue gas heat-conducting oil furnace divides two-way: flue of leading up to is connected with the arrival end of chimney, and a road is connected with the arrival end of flue gas heat-exchange unit；The port of export of flue gas heat-exchange unit divides two-way: a road is connected with the arrival end of chimney, the port of export of a road and domestic hot-water's heat exchanger in parallel jointly with being connected with water inlet end of domestic hot-water user.
Above-mentioned gas internal combustion electric generator group is powered to 10.5KV high-voltage fence with civil power simultaneously, and two-way power supply sets up two Sets of Measurement cabinets separately and measures respectively, massive quantity power supply and measurement.
The output voltage grade of above-mentioned low temperature exhaust heat ORC screw rod generating set is identical with line voltage grade, and two-way power sources in parallel is on low voltage electric network.
The beneficial effects of the utility model are as follows:
1), the grid-connected method of operation do not surfed the Net, not enough electric power is used to be supplemented by civil power.When gas internal combustion electric generator group is stopped, commercial power supply will be automatically switched to, it is ensured that the security provisions of LNG liquefaction plant electric power.
2), system cylinder sleeve waste heat almost all utilize, fume afterheat utilizes temperature drop to reach 105 DEG C.Overall energy efficiency is higher, and gas internal-combustion engine generating efficiency can reach 44%, and low temperature exhaust heat ORC screw rod generating set generating efficiency can reach 1.5%, reaches maximum electric load as far as possible, meets LNG liquefaction plant electrical load requirement, heat energy recycle rate 30%.
3), utilizing the fume afterheat of gas internal combustion electric generator group to add heat smoke heat-conducting oil furnace, need not original gas heat conducting oil stove and consume natural gas energy resource, green low-carbon time properly functioning, energy ladder utilizes, and energy utilization rate reaches to maximize.
4), utilizing low temperature exhaust heat ORC screw rod generating set to absorb the waste heat of jacket water, utilize inferior heat, recovery waste heat generates electricity, generating efficiency about 10%, meets LNG liquefaction plant power demands to greatest extent.
Accompanying drawing explanation
Fig. 1 is the structural representation that this utility model is applied to the distributed busbar protection of LNG liquefaction plant.
In figure: 1, gas internal combustion electric generator group, 2, flue gas heat-conducting oil furnace, 3, domestic hot-water's heat exchanger, 4, heating heat exchanger, 5, low temperature exhaust heat ORC screw rod generating set, 6, flue gas heat-exchange unit, 7, chimney, 8, domestic hot-water user, 9, heating user, 10, low voltage electric network, 11, gas distributing system, 12,10.5KV high-voltage fence, 13, flue, 14, jacket water waste heat pipeline, 15, gas heat conducting oil stove.
Detailed description of the invention
With embodiment, this utility model is described in further details below in conjunction with the accompanying drawings.
As shown in Figure 1, this utility model is applied to the distributed busbar protection of LNG liquefaction plant and includes that power generation part, jacket water UTILIZATION OF VESIDUAL HEAT IN part and fume afterheat utilize part, power generation part includes mains electricity input end, gas internal combustion electric generator group 1, low voltage electric network 10 and 10.5KV high-voltage fence 12, jacket water UTILIZATION OF VESIDUAL HEAT IN part includes domestic hot-water's heat exchanger 3, heating heat exchanger 4 and low temperature exhaust heat ORC screw rod generating set 5, and fume afterheat utilization part includes flue gas heat-conducting oil furnace 2 and flue gas heat-exchange unit 6.The entrance point of gas internal combustion electric generator group 1 is connected with gas distributing system 11, generated electricity with air mixed combustion by natural gas, the outfan of gas internal combustion electric generator group 1 is connected to 10.5KV high-voltage fence 12, design grid-connected with electrical network, but can not power to plant area together with original system to grid transmission.The high-temperature flue gas port of export that gas internal combustion electric generator group 1 burning produces is connected with the arrival end of flue gas heat-conducting oil furnace 2 by flue 13, exhanst gas outlet through flue gas heat-conducting oil furnace 2 cooling divides again two whereabouts: a branch road flue gas enters flue gas heat-exchange unit 6, in parallel with domestic hot-water's heat exchanger 3, supply hot water for life to domestic hot-water user 8；Remaining flue gas of another branch road owing to continuing temperature drop along road, and last flue gas discharge opening is connected with the entrance of chimney 7 by flue 13, and row is to outdoor.If the shortage of heat that flue gas heat-conducting oil furnace 2 provides, then supplemented by gas heat conducting oil stove 15.The outlet of the jacket water waste heat pipeline 14 of gas internal combustion electric generator group 1 divides three tunnels: a road is supplied the arrival end of heating heat exchanger 4 and is connected with winter, gives heating user 9 after heat exchange；One tunnel is connected with the arrival end of supply domestic hot-water's heat exchanger 3, gives domestic hot-water user 8 after heat exchange；One road remainder waste heat is connected with the arrival end of low temperature exhaust heat ORC screw rod generating set 5, and the output electricity grade of low temperature exhaust heat ORC screw rod generating set 5 is 038KV, identical with mains voltage grade, and the while of two-way power supply and on one section of low voltage electric network 10.
Distributed busbar protection of the present utility model uses gas internal combustion electric generator group 1 and low temperature exhaust heat ORC screw rod generating set 5 co-production part electricity, generating efficiency can reach nearly 46%, the electricity price cost of this part electricity is than the electricity price low cost of utility grid, decrease the electricity from utility grid power taking, save mains supply, thus save production cost；And utilize fume afterheat to heat heat-conducting oil furnace 2, the gas consumption of original gas fired-boiler can be saved；The waste heat utilizing jacket water meets the heating of whole liquefaction plant and the needs of domestic hot-water.The energy not only ladder utilizes, and improves generating efficiency, reduces the operating cost of liquefaction plant, and the gas price of liquefaction plant is cheap, is especially suitable for the construction of Distribution of Natural formula energy source station.
Below as a example by the LNG liquefaction plant of 30 ten thousand steres, illustrate the beneficial effect that distributed busbar protection of the present utility model is capable of.Specific as follows:
1) power generation part:
Selecting two 2*2679KW Jenbacher internal combustion unit combustion gas, every generating set sends 10.5KV, rated generation amount 2679KW, and gas price is 1.5 yuan, and conversion electricity price is 0.449 yuan/KWh, and civil power electricity price is 0.6 yuan/KWh.
2) jacket water UTILIZATION OF VESIDUAL HEAT IN part:
Two unit cylinder sleeve waste heats add up to 2550KW, hot water temperature 90/75 DEG C.Jacket water UTILIZATION OF VESIDUAL HEAT IN is divided into following three branch road:
1. heating heat exchanger, rated load 700KW are supplied winter；If winter, internal combustion engine was all shut down, then need to start former direct combustion unit and supplement heating.
2. supply domestic water heat exchanger, supplies life heat in factory together with partial fume waste heat, and demand peak load is 670KW, and two parts waste heat should be with fume afterheat as elder generation.Therefore jacket water waste heat feeds to domestic water heat in 0-670KW scope.
3. remainder waste heat is used for low temperature exhaust heat ORC screw rod generating set, and input heat is 2550KW to the maximum, according to the data of offer, determines this cryogenerator model PC250/S90, generating voltage 380V, mean net electromotive power output 189KW, generating efficiency about 10%.
3) fume afterheat utilizes part:
1. two internal combustion unit port of export flue-gas temperatures are 410 DEG C, and flow is 2*14375kg/h altogether.Initially entering flue gas heat-conducting oil furnace heating conduction oil, the most preferable operating mode is to conduction oil heat output 2330KW, and oil outlet temperature is 280 DEG C.And flue gas is lowered the temperature through heat release, reach 150 DEG C (flue gas cool-down to 150 DEG C releases nearly 2330KW), consider heat loss, the heat exchange efficiency of flue gas heat-condutive oil heat exchanger and two internal combustion units along road flue gas it cannot be guaranteed that full send out and meet flue gas reach the operating mode of 410 DEG C, in actual motion, the flue-gas temperature finally going out flue gas heat-exchange unit should be at 130-150 DEG C.If the shortage of heat that flue gas heat-conducting oil furnace provides, then supplemented by gas heat conducting oil stove.
2. after flue-gas temperature becomes 130-150 DEG C, it is divided into two whereabouts: a, flue gas one branch road to enter flue gas water-to-water heat exchanger, supplies life heat to user, in parallel with jacket water waste heat life heat；B, remaining flue gas owing to continuing temperature drop along road, and last flue gas discharge temperature is generally below 105 DEG C.
This utility model is taked to be applied to the distributed busbar protection of LNG liquefaction plant, LNG liquefaction plant electricity consumption unit price can be reduced, make this energy source station electromotive power output to greatest extent, fume afterheat is utilized to heat heat-conducting oil furnace, energy ladder utilizes, Optimizing Flow, reduces the amount of consumed gas of gas fired-boiler, and with low temperature ORC screw rod electromotor generating electricity on jacket water low temperature heat, improve efficiency of energy utilization.
Claims (2)
1. the distributed busbar protection being applied to LNG liquefaction plant, part is utilized including power generation part, jacket water UTILIZATION OF VESIDUAL HEAT IN part and fume afterheat, it is characterized in that, described power generation part includes mains electricity input end, gas internal combustion electric generator group (1), low voltage electric network (10) and 10.5KV high-voltage fence (12), described jacket water UTILIZATION OF VESIDUAL HEAT IN part includes that domestic hot-water's heat exchanger (3), heating heat exchanger (4) and low temperature exhaust heat ORC screw rod generating set (5), described fume afterheat utilization part include flue gas heat-conducting oil furnace (2) and flue gas heat-exchange unit (6)；The entrance point of gas internal combustion electric generator group (1) is connected with gas distributing system (11), and the high-temperature flue gas port of export of gas internal combustion electric generator group (1) is connected with the arrival end of flue gas heat-conducting oil furnace (2)；The port of export of the jacket water of jet dynamic control divides three tunnels: a road is supplied the arrival end of heating heat exchanger (4) and is connected with winter, one tunnel is connected with the arrival end of supply domestic hot-water's heat exchanger (3), and a road is connected with the arrival end of low temperature exhaust heat ORC screw rod generating set (5)；The port of export of flue gas heat-conducting oil furnace (2) divides two-way: flue (13) of leading up to is connected with the arrival end of chimney (7), and a road is connected with the arrival end of flue gas heat-exchange unit (6)；The port of export of flue gas heat-exchange unit (6) divides two-way: a road is connected with the arrival end of chimney (7), the port of export of a road and domestic hot-water's heat exchanger (3) in parallel jointly with being connected with water inlet end of domestic hot-water user (8).
A kind of distributed busbar protection being applied to LNG liquefaction plant, it is characterized in that, the output voltage grade of described low temperature exhaust heat ORC screw rod generating set (5) is identical with line voltage grade, and two-way power sources in parallel is on low voltage electric network (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620421307.3U CN205753443U (en) | 2016-05-11 | 2016-05-11 | A kind of distributed busbar protection being applied to LNG liquefaction plant |
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| CN201620421307.3U CN205753443U (en) | 2016-05-11 | 2016-05-11 | A kind of distributed busbar protection being applied to LNG liquefaction plant |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790312A (en) * | 2016-05-11 | 2016-07-20 | 大连派思新能源发展有限公司 | Distributed energy resource station applied to LNG (Liquefied Natural Gas) plant |
| CN108964041A (en) * | 2018-07-23 | 2018-12-07 | 燕山大学 | A kind of control method of electricity-interconnection integrated energy system peak load deliverability |
-
2016
- 2016-05-11 CN CN201620421307.3U patent/CN205753443U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790312A (en) * | 2016-05-11 | 2016-07-20 | 大连派思新能源发展有限公司 | Distributed energy resource station applied to LNG (Liquefied Natural Gas) plant |
| CN108964041A (en) * | 2018-07-23 | 2018-12-07 | 燕山大学 | A kind of control method of electricity-interconnection integrated energy system peak load deliverability |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20200511 |