CN204922357U - Liquefied natural gas heating system - Google Patents

Liquefied natural gas heating system Download PDF

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Publication number
CN204922357U
CN204922357U CN201520516243.0U CN201520516243U CN204922357U CN 204922357 U CN204922357 U CN 204922357U CN 201520516243 U CN201520516243 U CN 201520516243U CN 204922357 U CN204922357 U CN 204922357U
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China
Prior art keywords
modulating valve
valve
economizer
valves
bypass
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Application number
CN201520516243.0U
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Chinese (zh)
Inventor
苏保兴
何胜
王贵彦
陈永刚
赵锋
郑文广
徐敏
宋国亮
张海珍
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Shanghai Huadian Fengxian Thermoelectricity Co Ltd
Huadian Electric Power Research Institute Co Ltd
Original Assignee
Shanghai Huadian Fengxian Thermoelectricity Co Ltd
Huadian Electric Power Research Institute Co Ltd
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Abstract

The utility model relates to a liquefied natural gas heating system. Still do not have a structural design reasonable at present, the waste heat of discharging fume that utilizes exhaust -heat boiler heats the system of the natural gas. The utility model discloses a characteristics are: still include the heat exchanger no. One, no. Two heat exchangers, economizer circulation circuit, a governing valve bypass, heat transfer return circuit and economizer, economizer circulation circuit and economizer are connected, a valve, a circulating pump, no. Two valves and a governing valve are all installed on economizer circulation circuit, the one end of a governing valve bypass is connected and is being lain in the economizer circulation circuit between no. Two valves and the governing valve, the other end is connected and to be lain in the economizer circulation circuit between governing valve and the economizer, no. Two governing valves, heat exchanger, no. Three governing valves and motorised valve are all installed in a governing valve bypass, and heat transfer loop connection is on heat exchanger and no. Two heat exchangers. The utility model discloses the waste heat of discharging fume that utilizes exhaust -heat boiler heats the natural gas.

Description

A kind of LNG Liquefied natural gas heating system
Technical field
The utility model relates to a kind of LNG Liquefied natural gas heating system, and particularly a kind of GTCC power plant LNG Liquefied natural gas heating system, utilizes waste heat to carry out heated natural gas.
Background technique
Current, along with the increasingly stringent of national environmental protection discharge, conventional fossil fuel is constantly challenged, consumption growth slowdown, the share of clean energy resource progressively rises, obtain paying close attention to more and more widely and applying, rock gas, as a kind of clean energy resource, have also been obtained development energetically in the prevailing power industry of fossil fuel.GTCC power plant gas source used is generally LNG Liquefied natural gas, and LNG Liquefied natural gas is through the rock gas of pressurization cooling, can not be delivered directly to gas turbine combustion, but needs to heat up through decompression to be converted to the rock gas of normal temperature.LNG Liquefied natural gas temperature-rising method conventional is at present the electric energy of electric heating or heating of seawater, electric heating at substantial, and heating of seawater pollutes seawater, is not optimum heat form, needs to explore the LNG Liquefied natural gas heating system being more suitable for GTCC power plant.Also there is no a kind of reasonable in design, energy-saving and emission-reduction at present, utilize the smoke discharging residual heat of exhaust heat boiler to carry out the system of heated natural gas.
Model utility content
The purpose of this utility model is to overcome above shortcomings in prior art, and provides a kind of reasonable in design, energy-saving and emission-reduction, utilizes the smoke discharging residual heat of exhaust heat boiler to carry out the LNG Liquefied natural gas heating system of heated natural gas.
The technical scheme in the invention for solving the above technical problem is: this LNG Liquefied natural gas heating system comprises combustion gas to manage removes combustion engine pipe with combustion gas, and its structural feature is: also comprise a valve, a recycle pump, No. two valves, a modulating valve, No. two modulating valve, mortor operated valve, a heat exchanger, No. three modulating valve, No. four modulating valve, No. two heat exchangers, economizer circulation loop, a modulating valve bypass, heat-exchanging loop and the economizer be arranged in exhaust heat boiler, described economizer circulation loop is connected with economizer, a described valve, a recycle pump, No. two valves and a modulating valve are installed on economizer circulation loop, this valve, a recycle pump, No. two valves and a modulating valve are arranged in order along the media flow direction in economizer circulation loop, one end of a described modulating valve bypass is connected on the economizer circulation loop between No. two valves and a modulating valve, the other end of this modulating valve bypass is connected on an economizer circulation loop between modulating valve and economizer, described No. two modulating valve, a heat exchanger, No. three modulating valve and mortor operated valve are installed in a modulating valve bypass, these No. two modulating valve, a heat exchanger, No. three modulating valve and mortor operated valve are arranged in order along a modulating valve bypass, described heat-exchanging loop is connected on a heat exchanger and No. two heat exchangers, described No. four modulating valve are arranged on heat-exchanging loop, and described combustion gas is managed and gone combustion engine Guan Jun to be connected on No. two heat exchangers with combustion gas.
As preferably, the utility model also comprises shunt circuit pipe, No. three valves, No. two recycle pumps and No. four valves, one end of described shunt circuit pipe is connected on the economizer circulation loop between economizer and a valve, the other end of this shunt circuit pipe is connected on the economizer circulation loop between No. two valves and a modulating valve, described No. three valves, No. two recycle pumps and No. four valves are installed on the pipe of shunt circuit, and these No. three valves, No. two recycle pumps and No. four valves are arranged in order along the media flow direction in the pipe of shunt circuit.
As preferably, the utility model also comprises emergency bypass, and one end of described emergency bypass is connected on the heat-exchanging loop between a heat exchanger and No. four modulating valve.
As preferably, the utility model also comprises boiler feed pipe, and one end of described boiler feed pipe is connected in a modulating valve bypass between mortor operated valve and No. three modulating valve.
As preferably, the utility model also comprises low service system bypass, described in go to one end of low service system bypass to be connected between economizer and a valve economizer circulation loop on.
As preferably, No. two modulating valve described in the utility model, heat exchanger, No. three modulating valve and a mortor operated valve are arranged in order along media flow direction in a modulating valve bypass.
The utility model compared with prior art, have the following advantages and effect: reasonable in design, design is unique, energy utilization rate is high, be conducive to energy-saving and emission-reduction, can effectively utilize the smoke discharging residual heat of exhaust heat boiler to carry out heats liquefied natural gas, by these three grades of heater structure indirect heating LNG Liquefied natural gas of economizer circulation loop, a modulating valve bypass and heat-exchanging loop, heating effect is good.
Accompanying drawing explanation
Fig. 1 is the structural representation of LNG Liquefied natural gas heating system in the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, also by embodiment, the utility model is described in further detail, and following examples are that the utility model is not limited to following examples to explanation of the present utility model.
Embodiment.
See Fig. 1, the LNG Liquefied natural gas heating system in the present embodiment comprises economizer 1, valve 2, recycle pump 3, No. two valves 4, No. three valves 5, No. two recycle pumps 6, No. four valves 7, modulating valve 8, No. two modulating valve 9, mortor operated valve 10, heat exchanger 11, No. three modulating valve 12, No. four modulating valve 13, No. two heat exchangers 14, economizer circulation loop 15, modulating valve bypass 16, a heat-exchanging loop 17, removes low service system bypass 18, boiler feed pipe 19, emergency bypass 20, combustion gas carrys out pipe 21, combustion engine pipe 22 is removed in combustion gas and shunt circuit pipe 23.
Economizer 1 in the present embodiment is arranged in exhaust heat boiler 24, economizer circulation loop 15 is connected with economizer 1, a valve 2, recycle pump 3, No. two valves 4 and a modulating valve 8 are installed on economizer circulation loop 15, and this valve 2, recycle pump 3, No. two valves 4 and a modulating valve 8 are arranged in order along the media flow direction in economizer circulation loop 15.
In the present embodiment, one end of shunt circuit pipe 23 is connected on economizer circulation loop 15, and one end of shunt circuit pipe 23 is between economizer 1 and a valve 2, namely one end of shunt circuit pipe 23 is connected on the economizer circulation loop 15 between economizer 1 and a valve 2.The other end of shunt circuit pipe 23 is connected on economizer circulation loop 15, and the other end of shunt circuit pipe 23 is between No. two valves 4 and a modulating valve 8, namely the other end of shunt circuit pipe 23 is connected on the economizer circulation loop 15 between No. two valves 4 and a modulating valve 8.No. three valves 5, No. two recycle pumps 6 and No. four valves 7 are installed on shunt circuit pipe 23, and these No. three valves 5, No. two recycle pumps 6 and No. four valves 7 are arranged in order along the media flow direction in shunt circuit pipe 23.
One end of a modulating valve bypass 16 in the present embodiment connects on economizer circulation loop 15, and one end of a modulating valve bypass 16 is between No. two valves 4 and a modulating valve 8, i.e. one end of a modulating valve bypass 16 is connected on the economizer circulation loop 15 between No. two valves 4 and a modulating valve 8.In the present embodiment, the other end of a modulating valve bypass 16 is connected on economizer circulation loop 15, and the other end of a modulating valve bypass 16 is between a modulating valve 8 and economizer 1, i.e. the other end of a modulating valve bypass 16 is connected on the economizer circulation loop 15 between a modulating valve 8 and economizer 1.9, the heat exchanger of No. two modulating valve in the present embodiment, 11, No. three modulating valve 12 and mortor operated valve 10 are installed in a modulating valve bypass 16, these No. two modulating valve 9, heat exchanger 11, No. three modulating valve 12 and mortor operated valve 10 are arranged in order along a modulating valve bypass 16, and No. two modulating valve 9, heat exchanger 11, No. three modulating valve 12 and mortor operated valve 10 are arranged in order along media flow direction in a modulating valve bypass 16 usually.
Heat-exchanging loop 17 in the present embodiment is connected on a heat exchanger 11 and No. two heat exchangers 14, and No. four modulating valve 13 are arranged on heat-exchanging loop 17, and combustion gas carrys out pipe 21 and combustion gas goes combustion engine pipe 22 to be all connected on No. two heat exchangers 14.One end of emergency bypass 20 is connected on the heat-exchanging loop 17 between a heat exchanger 11 and No. four modulating valve 13.One end of boiler feed pipe 19 is connected in a modulating valve bypass 16 between mortor operated valve 10 and No. three modulating valve 12.On the economizer circulation loop 15 going to one end of low service system bypass 18 to be connected between economizer 1 and a valve 2.
LNG Liquefied natural gas heating system in the present embodiment utilizes the smoke discharging residual heat of exhaust heat boiler 24, and by three grades of heater indirect heating LNG Liquefied natural gas, energy utilization rate is high, and heating effect is good.Smoke evacuation after combustion engine acting is through exhaust heat boiler 24, feedwater in heating economizer 1, water in economizer 1 is divided into two-way after heating up, one road is to low service system, one road, to recirculating system, when LNG Liquefied natural gas heating system is run, is opened No. two modulating valve 9 from recirculating system, is extracted a part of hot water, by a heat exchanger 11 and No. two heat exchangers 14, the hot water heat in recirculating system is passed to LNG Liquefied natural gas, LNG Liquefied natural gas is heated up.When not needing heats liquefied natural gas or the LNG Liquefied natural gas system failure, close No. two modulating valve 9 and No. three modulating valve 12.A heat exchanger 11 is water-water heat exchanger, and No. two heat exchangers 14 are water-gas heat exchanger.
In addition, it should be noted that, the specific embodiment described in this specification, the shape, institute's title of being named etc. of its parts and components can be different, and the above content described in this specification is only to the explanation of the utility model structure example.The equivalence change that structure, feature and principle described in all foundation the utility model inventional idea are done or simple change, be included in the protection domain of the utility model patent.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment; only otherwise depart from structure of the present utility model or surmount this scope as defined in the claims, protection domain of the present utility model all should be belonged to.

Claims (6)

1. a LNG Liquefied natural gas heating system, comprises combustion gas to manage (21) and combustion engine pipe (22) is removed in combustion gas, it is characterized in that: also comprise a valve (2), a recycle pump (3), No. two valves (4), a modulating valve (8), No. two modulating valve (9), mortor operated valve (10), a heat exchanger (11), No. three modulating valve (12), No. four modulating valve (13), No. two heat exchangers (14), economizer circulation loop (15), a modulating valve bypass (16), heat-exchanging loop (17) and the economizer (1) be arranged in exhaust heat boiler (24), described economizer circulation loop (15) is connected with economizer (1), a described valve (2), a recycle pump (3), No. two valves (4) and a modulating valve (8) are installed on economizer circulation loop (15), this valve (2), a recycle pump (3), No. two valves (4) and a modulating valve (8) are arranged in order along the media flow direction in economizer circulation loop (15), one end of a described modulating valve bypass (16) is connected on the economizer circulation loop (15) that is positioned between No. two valves (4) and a modulating valve (8), the other end of this modulating valve bypass (16) is connected on the economizer circulation loop (15) that is positioned between a modulating valve (8) and economizer (1), described No. two modulating valve (9), a heat exchanger (11), No. three modulating valve (12) and mortor operated valve (10) are installed on a modulating valve bypass (16), these No. two modulating valve (9), a heat exchanger (11), No. three modulating valve (12) and mortor operated valve (10) are arranged in order along a modulating valve bypass (16), described heat-exchanging loop (17) is connected on a heat exchanger (11) and No. two heat exchangers (14), described No. four modulating valve (13) are arranged on heat-exchanging loop (17), and (21) are managed in described combustion gas and combustion gas goes combustion engine pipe (22) to be all connected on No. two heat exchangers (14).
2. LNG Liquefied natural gas heating system according to claim 1, it is characterized in that: also comprise shunt circuit pipe (23), No. three valves (5), No. two recycle pumps (6) and No. four valves (7), one end of described shunt circuit pipe (23) is connected on the economizer circulation loop (15) that is positioned between economizer (1) and a valve (2), the other end of this shunt circuit pipe (23) is connected on the economizer circulation loop (15) that is positioned between No. two valves (4) and a modulating valve (8), described No. three valves (5), No. two recycle pumps (6) and No. four valves (7) are installed on shunt circuit pipe (23), these No. three valves (5), No. two recycle pumps (6) and No. four valves (7) are arranged in order along the media flow direction in shunt circuit pipe (23).
3. LNG Liquefied natural gas heating system according to claim 1, it is characterized in that: also comprise emergency bypass (20), one end of described emergency bypass (20) is connected on the heat-exchanging loop (17) that is positioned between a heat exchanger (11) and No. four modulating valve (13).
4. LNG Liquefied natural gas heating system according to claim 1, it is characterized in that: also comprise boiler feed pipe (19), one end of described boiler feed pipe (19) is connected on a modulating valve bypass (16) being positioned between mortor operated valve (10) and No. three modulating valve (12).
5. LNG Liquefied natural gas heating system according to claim 1, it is characterized in that: also comprise low service system bypass (18), described in go to one end of low service system bypass (18) to be connected to be positioned between economizer (1) and a valve (2) economizer circulation loop (15) on.
6. the LNG Liquefied natural gas heating system according to the arbitrary claim of claim 1-5, is characterized in that: described No. two modulating valve (9), heat exchanger (11), No. three modulating valve (12) and a mortor operated valve (10) are arranged in order along an interior media flow direction of modulating valve bypass (16).
CN201520516243.0U 2015-07-16 2015-07-16 Liquefied natural gas heating system Active CN204922357U (en)

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Application Number Priority Date Filing Date Title
CN201520516243.0U CN204922357U (en) 2015-07-16 2015-07-16 Liquefied natural gas heating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520516243.0U CN204922357U (en) 2015-07-16 2015-07-16 Liquefied natural gas heating system

Publications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106524214A (en) * 2016-12-23 2017-03-22 山东电力工程咨询院有限公司 Ignition gas system of gas turbine power plant and ignition method of ignition gas system
CN115247784A (en) * 2022-07-12 2022-10-28 中国能源建设集团广东省电力设计研究院有限公司 Power plant waste heat utilization system and use method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106524214A (en) * 2016-12-23 2017-03-22 山东电力工程咨询院有限公司 Ignition gas system of gas turbine power plant and ignition method of ignition gas system
CN115247784A (en) * 2022-07-12 2022-10-28 中国能源建设集团广东省电力设计研究院有限公司 Power plant waste heat utilization system and use method
CN115247784B (en) * 2022-07-12 2024-04-09 中国能源建设集团广东省电力设计研究院有限公司 Power plant waste heat utilization system and use method

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