CN210176512U - Seawater desalination system utilizing waste heat of gas turbine - Google Patents

Seawater desalination system utilizing waste heat of gas turbine Download PDF

Info

Publication number
CN210176512U
CN210176512U CN201920668648.4U CN201920668648U CN210176512U CN 210176512 U CN210176512 U CN 210176512U CN 201920668648 U CN201920668648 U CN 201920668648U CN 210176512 U CN210176512 U CN 210176512U
Authority
CN
China
Prior art keywords
waste heat
steam
gas turbine
seawater desalination
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201920668648.4U
Other languages
Chinese (zh)
Inventor
Hui Chen
陈辉
Yusen Yang
杨豫森
Hua Cui
崔华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HEPP Energy Environment Technology Co.,Ltd.
Original Assignee
Hep Energy And Environment Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hep Energy And Environment Technology Co ltd filed Critical Hep Energy And Environment Technology Co ltd
Priority to CN201920668648.4U priority Critical patent/CN210176512U/en
Application granted granted Critical
Publication of CN210176512U publication Critical patent/CN210176512U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124Water desalination
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/14Combined heat and power generation [CHP]
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

Landscapes

  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

The utility model provides a sea water desalination system utilizing waste heat of a gas turbine. The seawater desalination system utilizing the waste heat of the gas turbine comprises a power generation module and a seawater desalination module which are connected, wherein the power generation module comprises a gas compressor, the gas turbine, a waste heat boiler, a steam turbine and a power generator, the gas compressor, the gas turbine, the waste heat boiler and the steam turbine are sequentially connected, the gas turbine and the steam turbine are respectively connected with the power generator for power generation, and the seawater desalination module utilizes the waste heat generated by the power generation module to prepare fresh water. The utility model discloses a with gas turbine and sea water desalination mutually coupled, utilize the high temperature flue gas of gas turbine or internal-combustion engine cylinder liner water waste heat, drive distillation method sea water desalination and carry out water and electricity coproduction, realize the utilization of energy gradient.

Description

Seawater desalination system utilizing waste heat of gas turbine
Technical Field
The utility model relates to a gas turbine waste heat utilization field, concretely relates to utilize sea water desalination of gas turbine waste heat.
Background
The distributed energy system is formally promoted and constructed after the public utility policy is issued in 1978 in the United states, is accepted by other advanced countries, is a medium and small terminal energy supply system directly providing various forms of energy for users, conforms to the scientific energy utilization principle of 'temperature matching and gradient utilization' advocated by Mr. Wuzhong Hua, and has the advantages of higher energy utilization rate, low energy cost, higher energy supply safety, better environmental protection performance and the like, and is promoted. The combined cooling heating and power system is the most bright prospect in a distributed energy system, is also the system with the most practicability and development vigor, is directly oriented to users, provides power, cold, heat, domestic hot water and the like according to the user requirements, and simultaneously solves the multi-energy requirement and realizes the multi-energy supply target. At present, a gas turbine and an internal combustion engine are mainly used as power systems in a combined cooling heating and power system, the combined cooling and power system with the power of less than 1MW, the internal combustion engine occupies an absolute leading position, and for the combined cooling heating and power system with the power of 1-5 MW, the number of the gas turbine is about half of that of the internal combustion engine. When the internal combustion engine works, the temperature of fuel gas in the cylinder reaches 2000-2500 ℃, particularly parts such as a cylinder cover, a piston, a cylinder sleeve and a valve which are directly contacted with combustion gas are heated strongly, and in the running process of the engine, the parts can cause material strength reduction or thermal fatigue damage because of too high working temperature, so that the service life and the working reliability of the engine are influenced. Therefore, an engine cooling system is required to take away heat conducted from a heated component in time to ensure that the engine works in an optimum temperature range, and cylinder liner water is required to circularly cool internal components of the internal combustion engine. The outlet temperature of the cylinder liner water is generally lower than 100 ℃, the energy grade is lower, but the quantity is larger, the waste heat discharged along with the cylinder liner water accounts for 30-40% of the input fuel, and the cylinder liner water can be used for providing domestic hot water or an absorption heat pump. However, in the non-heat-supply areas in the south, the waste heat of the low-grade cylinder liner water cannot be utilized, so that a large amount of heat is discharged in vain.
On the other hand, as the global economy develops and the population increases, the demand of human beings for fresh water resources is also increasing. The shortage of fresh water resources has already restricted the development of global economy. The shortage of fresh water resources in the future is predicted by experts, so that the development of global economy is influenced, and the shortage is also related to the major social problem of human sustainable development.
The method is a new energy-saving and emission-reducing seawater desalination technical measure by utilizing the waste heat of gas turbine distributed energy projects which are more and more appeared in the future, including flue gas waste heat, steam turbine exhaust waste heat and cylinder sleeve water waste heat as heat sources to carry out distillation type seawater desalination, multi-stage flash evaporation seawater desalination or multi-effect evaporation seawater desalination on seawater.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model discloses a main objective aims at utilizing the gas turbine waste heat, especially utilizing the high temperature flue gas of gas turbine or internal-combustion engine cylinder liner water waste heat, is used for driving distillation method sea water desalination. Another objective of the present invention is to further utilize an electric steam boiler to generate steam to drive a seawater desalination system, so as to organically combine the waste heat utilization and the seawater desalination.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides an utilize sea water desalination of gas turbine waste heat, includes continuous power generation module and sea water desalination module, the power generation module includes compressor, gas turbine, exhaust-heat boiler, steam turbine, generator, compressor, gas turbine, exhaust-heat boiler, steam turbine link to each other the setting in proper order, gas turbine, steam turbine link to each other with the generator respectively and are used for the electricity generation, sea water desalination module utilizes the waste heat that the power generation module produced in order to prepare fresh water, the waste heat that the power generation module produced includes at least one in flue gas waste heat, cylinder liner water waste heat, exhaust steam waste heat, the compressor waste heat.
Further, the combustion engine includes any one of a gas turbine or an internal combustion engine. Furthermore, the seawater desalination module adopts any one of a low-temperature multi-effect evaporation technology or a multi-stage flash evaporation technology.
Furthermore, the seawater desalination module is any one of 4-effect, 5-effect, 6-effect, 7-effect, 8-effect, 9-effect or 10-effect evaporation devices adopting a low-temperature multi-effect evaporation technology.
Further, the flue gas waste heat is from any one of a gas turbine, a waste heat boiler and an internal combustion engine.
Furthermore, the seawater desalination system utilizing the waste heat of the gas turbine also comprises an electric steam boiler, the electric steam boiler is respectively connected with the generator, the electric switch and the seawater desalination module, and the power of the electric steam boiler is steplessly adjusted within 0-100%.
The utility model also provides a method of the sea water desalination system of utilizing the waste heat of the gas turbine, including the following steps:
s1 energy Q capable of being utilized according to residual heat of combustion engineGeneral assemblySelecting a seawater desalination technical route under the actual field conditions, and executing S2 if a low-temperature multi-effect evaporation process is selected; performing S3 if the multi-stage flash process is selected;
s2, designing a low-temperature multi-effect evaporation process flow according to the waste heat type of the waste heat utilization of the gas turbine;
s3, designing a multi-stage flash evaporation process flow according to the waste heat type of the waste heat utilization of the gas turbine;
and S4, reasonably designing the evaporation stages to be in the range from 4 to 10 effects/stages according to the temperature of the waste heat, wherein the total principle is that the higher the temperature of the waste heat is, the more the evaporation stages are arranged, but the more the evaporation stages are not more than 10 effects/stages.
S5: selecting large-quantity low-temperature waste heat, such as cylinder sleeve water or steam turbine exhaust waste heat, to directly exchange heat with raw material seawater, and preheating large-flow raw material seawater;
and S6, the seawater enters the seawater desalination module to be subjected to multi-effect evaporation to generate fresh water, and the fresh water is stored or supplied to a gas turbine or a waste heat boiler to generate steam according to the requirement.
Further, the number of evaporation stages in the step S4 is 4-6 stages.
Further, the heat balance equation of the evaporation process is as follows, which can guide the design of the evaporation process flow:
Qgeneral assembly=QResidual heat of flue gas+QWater afterheat of cylinder jacket+QWaste heat of steam
QResidual heat of flue gas=QHigh-temperature flue gas of gas turbine+QLow temperature flue gas of waste heat boiler
QWater afterheat of cylinder jacket=FCylinder sleeve water*CpWater (W)*(T2-T1)
QWaste heat of steam=QSteam of waste heat boiler+QSteam extraction of steam turbine+QSteam turbine exhaust
Evaporation process effect/stage number a ═ QGeneral assembly/qEffect stage
Wherein Q isGeneral assemblyThe total heat of the waste heat generated by the power generation device, KJ/h, comprises the flue gas waste heat QResidual heat of flue gasKJ/h, heat Q carried by cylinder liner water of combustion engineWater afterheat of cylinder jacketKJ/h and the heat Q carried by the steam generated by the gas turbine, the steam turbine and the exhaust-heat boilerWaste heat of steam,KJ/h;QHigh-temperature flue gas of gas turbine、QLow temperature flue gas of waste heat boilerThe heat of the high-temperature flue gas generated by the gas turbine and the waste heat boiler is KJ/h; fCylinder sleeve waterThe circulation flow of the cylinder liner water in the internal combustion engine is kg/h; cpWater (W)The specific heat capacity of water is kJ/kg ℃; t is2The temperature of the cylinder liner water flowing out of the internal combustion engine is DEG C; t is1The temperature of the cylinder liner water entering the internal combustion engine is DEG C; qSteam of waste heat boiler、QSteam extraction of steam turbine、QSteam turbine exhaustHeat carried by steam generated by the waste heat boiler, steam extraction of the steam turbine and exhaust of the steam turbine is KJ/h; q. q.sEffect stageHeat was used for each effect stage, KJ/h.
The utility model has the advantages that:
(1) the utility model discloses utilize flue gas waste heat, exhaust waste heat, cylinder liner water waste heat, compressor waste heat to satisfy sea water desalination device's heat demand, realize water and electricity coproduction.
(2) The utility model discloses couple combustion engine and low temperature multiple effect sea water desalination process mutually, can realize the gradient utilization of energy to realize the production fresh water of high-efficient low energy consumption.
(3) The utility model discloses a waste heat boiler utilizes the high temperature flue gas acting that the combustion engine produced to generate electricity with the drive generator, and the condenser coupling sea water desalination device that the steam turbine steam extraction is connected not only realizes the function of steam turbine steam extraction condensation, utilizes the heat of exhausting to realize the sea water desalination function moreover, improves energy utilization, reduction in production cost.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
FIG. 1 is a schematic diagram of a seawater desalination system using waste heat of a gas turbine according to the present invention;
fig. 2 is a schematic diagram of a seawater desalination system using waste heat of a gas turbine according to an embodiment of the present invention;
fig. 3 is another schematic diagram of a seawater desalination system using waste heat of a gas turbine according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a seawater desalination module in a seawater desalination system using waste heat of a gas turbine according to the present invention.
Description of the reference numerals
The system comprises a power grid control module-1, a power grid dispatching center-101, a power plant centralized control center-102, an electric switch-103, a power generation module-2, a gas turbine-3, a gas turbine-301, a gas engine-302, a gas compressor-4, a power generator-5, a waste heat boiler-6, a gas turbine-7, an electric steam boiler-8, a booster station-9, a condenser-10, a low-pressure heater-11, a deaerator-12, a feed water pump-13, a high-pressure heater-14, a seawater desalination module-15, a heat exchanger-16, a flash chamber-17, a first conveying pump-18 and a first preheater-19.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that the following embodiments are based on the technical solution, and the detailed embodiments and the specific operation processes are provided, but the protection scope of the present invention is not limited to the embodiments.
Example 1
As shown in fig. 1, the system for desalinating seawater by using waste heat of a gas turbine comprises a power grid control module 1, a power generation module 2, a seawater desalination module 15 and an electric steam boiler 8, wherein the power grid control module 1 is respectively connected with the power generation module 2 and the electric steam boiler 8, and the electric steam boiler 8 is connected with the power grid control module 1, the power generation module 2 and the seawater desalination module 15. Preferably, the power of the steam electric boiler 8 is steplessly adjusted within 0% -100%. After receiving the instruction, the power grid control module 1 adjusts the operation loads of the power generation module 2 and the electric steam boiler 8, so that the on-grid electric quantity is adjusted to meet the requirement. The steam generated by the electric steam boiler 8 provides energy for the seawater desalination module 15, and simultaneously, the waste heat generated by the power generation module 2 is conveyed to the seawater desalination module 15 for recycling, so that the gradient utilization of energy is realized. The waste heat comprises at least one of flue gas waste heat, cylinder sleeve water waste heat and exhaust steam waste heat.
Specifically, the power grid control module 1 is formed by sequentially connecting a power grid dispatching center 101, a power plant centralized control center 102 and an electric switch 103. The power grid dispatching center 101 gives an instruction to the power plant centralized control center 102 according to the market demand change, and the power plant centralized control center 102 gives a power supply instruction to the power generation module 2 and the steam electric boiler 8 according to the equipment operation parameters in the system; after receiving the power supply instruction, the power generation amount of the power generation module 2 and the power consumption of the steam electric boiler 8 are adjusted by adjusting the opening and closing of the electric switch 103 in real time.
The power generation module 2 comprises a condenser 10, a low-pressure heater 11, a deaerator 12, a water feeding pump 13, a high-pressure heater 14 and a combustion engine 3 which are sequentially connected, the combustion engine 3 is a gas turbine 301 or a combustion engine 302, the power generation module 2 further comprises a generator 5, a booster station 9 and a gas compressor 4, the generator 5 is respectively connected with the combustion engine 3 and the booster station 9, and the gas compressor 4 is connected with the combustion engine 3 and is used for providing compressed air for the combustion engine 3 to support combustion. The gas turbine 3 applies work to drive the generator 5 to generate electricity. Preferably, a waste heat boiler 6 and a steam turbine 7 are arranged between the combustion engine 3 and the generator 5, waste heat generated by the combustion engine 3 is recovered by the waste heat boiler 6 to generate steam, and the steam drives the steam turbine 7 to do work to drive the generator 5 to generate electricity. The device can recover part of waste heat generated by the combustion engine 3, and the energy efficiency ratio of the system is improved. Preferably, the generator 5 has 2 groups, and is respectively connected with the combustion engine 3 and the steam turbine 5. When the power plant generates power, on one hand, the gas turbine 3 drives the generator 5 to generate power. On the other hand, the water is pumped into high pressure feed water heater 14 through feed water pump 13 and is preheated, and the water after preheating gets into exhaust-heat boiler 6 in the operation in order to produce steam, and steam gets into steam turbine 7 in, turns into the kinetic energy with the heat energy of steam, and then drives generator 5 and produces the electric energy, merges into the national grid after stepping up through booster station 9. The exhaust from the turbine 7 may enter a condenser 10 or power a deaerator 12. When the exhaust steam enters the condenser 10 and is liquefied into water, the water is primarily heated by the low-pressure heater 11 and then is treated by the deaerator 12 and then returns to the high-pressure heater 14 through the water feeding pump 13 for recycling. Preferably, the low-pressure heater 11 and the high-pressure heater 14 can both heat the water body by the steam discharged by the steam turbine 7.
The seawater desalination module 15 is respectively connected with the gas turbine 3, the waste heat boiler 6, the steam turbine 7, the electric steam boiler 8 and the low-pressure heater 11 through pipelines. The seawater desalination module 15 adopts any one of a low-temperature multi-effect evaporation technology or a multi-stage flash evaporation technology. Preferably, the seawater desalination module 15 is any one of 4-effect, 5-effect, 6-effect, 7-effect, 8-effect, 9-effect or 10-effect evaporation devices, and adopts a low-temperature multi-effect evaporation technology. The seawater desalination module 15 is driven to operate by steam generated by the electric steam boiler 8, and simultaneously converts flue gas waste heat of the gas turbine 3 and the waste heat boiler 6 into steam or high-temperature water through the heat exchanger 16 according to requirements, or directly utilizes exhaust steam waste heat generated by the steam turbine 7 or cylinder sleeve water waste heat generated by the gas turbine 3 to carry out seawater desalination. The generated fresh water is stored or the steam water is supplemented to the power generation module 2 through the low-pressure heater 11.
The utility model also provides a method of the sea water desalination system of utilizing the waste heat of the gas turbine, including the following steps:
s1 total quantity Q capable of being utilized according to residual heat of combustion engineGeneral assemblySelecting a seawater desalination technical route under the actual field conditions, and executing S2 by selecting a low-temperature multi-effect evaporation process; selecting a multi-stage flash process and performing S3;
Qgeneral assembly=QResidual heat of flue gas+QWater afterheat of cylinder jacket+QWaste heat of steam
QResidual heat of flue gas=QHigh-temperature flue gas of gas turbine+QLow temperature flue gas of waste heat boiler
QWater afterheat of cylinder jacket=FCylinder sleeve water*CpWater (W)*(T2-T1)
QWaste heat of steam=QSteam of waste heat boiler+QSteam extraction of steam turbine+QSteam turbine exhaust
Wherein Q isGeneral assemblyThe total heat of the waste heat generated by the power generation device, KJ/h, comprises the flue gas waste heat QResidual heat of flue gasKJ/h, heat Q carried by cylinder liner water of combustion engineWater afterheat of cylinder jacketKJ/h and the heat Q carried by the steam generated by the gas turbine, the steam turbine and the exhaust-heat boilerWaste heat of steam,KJ/h;QHigh-temperature flue gas of gas turbine、QLow temperature flue gas of waste heat boilerThe heat of the high-temperature flue gas generated by the gas turbine and the waste heat boiler is KJ/h; fCylinder sleeve waterThe circulation flow of the cylinder liner water in the internal combustion engine is kg/h; cpWater (W)The specific heat capacity of water is kJ/kg ℃; t is2The temperature of the cylinder liner water flowing out of the internal combustion engine is DEG C; t is1The temperature of the cylinder liner water entering the internal combustion engine is DEG C; qSteam of waste heat boiler、QSteam extraction of steam turbine、QSteam turbine exhaustRespectively being residual heatThe heat carried by the steam generated by the boiler, the extraction steam of the steam turbine and the exhaust steam of the steam turbine is KJ/h;
s2, designing a low-temperature multi-effect evaporation process flow according to the waste heat type of the waste heat utilization of the gas turbine; the method specifically comprises the following steps: (1) the gas-steam combined cycle generator set is characterized in that flue gas waste heat (about 100 ℃) in exhaust smoke of a waste heat boiler 6 is converted into steam or high-temperature water through a heat exchanger 16 for utilization; (2) the internal combustion engine 302 drives the flue gas waste heat (about 100 ℃) in the exhaust smoke of the waste heat boiler 6 to be converted into steam or high-temperature water through the heat exchanger 16 for utilization; (3) residual heat (below 100 ℃) of cylinder jacket cooling water of the internal combustion engine 302; (4) the waste heat boiler 6 driven by the gas turbine 3 is used for producing steam, the steam turbine 7 is driven to generate electricity, the exhaust steam of the steam turbine 7 is used as a heat source, and a low-temperature multi-effect seawater evaporation process and the exhaust steam cooling of the steam turbine 7 are combined to form a hydropower cogeneration production mode of fresh water and electric power.
Evaporation process effect/stage number a ═ QGeneral assembly/qEffect stageWherein q isStageHeat was used for each effect stage, KJ/h.
S3: designing a multi-stage flash evaporation process flow according to the waste heat type of the waste heat utilization of the gas turbine;
specifically, the method comprises (1) converting high-temperature flue gas (about 400 ℃) of a gas turbine 301 into steam or high-temperature water by a heat exchanger 16 as a heat source for utilization; (2) the high-temperature flue gas (about 400 ℃) of the internal combustion engine 302 is used as a heat source and is converted into steam or high-temperature water through the heat exchanger 16 to be used for evaporating seawater.
S4: according to the waste heat temperature, the evaporation stages are reasonably designed to be in the range from 4 to 10 effects/stages, and the total principle is that the higher the waste heat temperature is, the more the evaporation stages are arranged, but the more the evaporation stages do not exceed 10 effects/stages.
Preferably, the evaporation number of the seawater desalination module is 4-6.
S5: selecting large-quantity low-temperature waste heat, such as cylinder sleeve water or steam turbine exhaust waste heat, to directly exchange heat with raw material seawater, and preheating large-flow raw material seawater;
s6, the seawater enters the seawater desalination module 15 to be evaporated in multiple effect to generate fresh water, and the fresh water is stored or supplied to the gas turbine 301 or the exhaust heat boiler 6 to generate steam according to the requirement. Specifically, the seawater desalination module 15 performs waste heat or direct heating on the seawater by using the waste heat generated by the power generation module 2, and performs seawater desalination by using a low-temperature multi-effect evaporation technology or a multi-stage flash evaporation technology, and the generated fresh water can be stored or conveyed to the waste heat boiler 6 or the gas turbine 301 through the feed pump 13 to generate steam for recycling.
Example 2
As shown in fig. 2, the power generation module 2 uses a gas turbine 301 to drive and generate power, and is coupled with the seawater desalination module 15 to realize water and electricity cogeneration.
A seawater desalination system utilizing waste heat of a gas turbine comprises a power grid control module 1, a power generation module 2, a seawater desalination module 15 and an electric steam boiler 8, wherein the power grid control module 1 is respectively connected with the power generation module 2 and the electric steam boiler 8, and the electric steam boiler 8 is connected with the power grid control module 1, the power generation module 2 and the seawater desalination module 15. Preferably, the power of the steam electric boiler 8 is steplessly adjusted within 0% -100%.
The power grid control module 1 is formed by sequentially connecting a power grid dispatching center 101, a power plant centralized control center 102 and an electric switch 103. The power grid dispatching center 101 gives an instruction to the power plant centralized control center 102 according to the market demand change, and the power plant centralized control center 102 gives a power supply instruction to the power generation module 2 and the steam electric boiler 8 according to the equipment operation parameters in the system; after receiving the power supply instruction, the power generation amount of the power generation module 2 and the power consumption of the steam electric boiler 8 are adjusted by adjusting the opening and closing of the electric switch 103 in real time.
Power generation module 2 is including consecutive condenser 10, low pressure feed water heater 11, oxygen-eliminating device 12, feed water pump 13, high pressure feed water heater 14 and gas turbine 301, power generation module 2 still includes generator 5, booster station 9, exhaust-heat boiler 6 and steam turbine 7, generator 5 links to each other with gas turbine 301, booster station 9 respectively. The gas turbine 301, the waste heat boiler 6, the steam turbine 7 and the generator 5 are connected in sequence. Preferably, the power generation module 2 further comprises a compressor 4, and the compressor 4 is connected to the gas turbine 301 and is used for providing compressed air for the gas turbine 301. On one hand, the gas turbine 301 can directly drive the generator 5 to generate power, the power is boosted through the booster station 9 and then is merged into a power grid, and high-temperature flue gas (about 400 ℃) generated by the gas turbine 301 exchanges heat with low-temperature steam or water to generate steam, and the steam enters the seawater desalination module 15 to be directly used for evaporating seawater; on the other hand, part of the flue gas waste heat generated by the gas turbine 301 is recovered by the waste heat boiler 6 to generate steam, and the steam drives the steam turbine 7 to do work to drive the generator 5 to generate electricity and then is merged into the power grid; meanwhile, the flue gas (100 ℃) generated by the waste heat boiler 6 is converted into steam or high-temperature water through the heat exchanger 16, and the low-pressure exhaust steam generated by the steam turbine 7 enters the seawater desalination module 15 through a pipeline to preheat seawater. This arrangement can recover a part of the waste heat generated by the gas turbine 301, thereby improving the energy efficiency ratio of the system.
The seawater desalination module 15 is a vertical tube serosa multi-effect evaporation device adopting a low-temperature multi-effect evaporation technology, and is respectively connected with the gas turbine 3, the waste heat boiler 6, the steam turbine 7, the electric steam boiler 8 and the low-pressure heater 11 through pipelines. The vertical tube serosa multi-effect evaporation device comprises a fresh water condenser, a preheater, a delivery pump and 5 evaporators which are arranged in series. The evaporator comprises an evaporation chamber, a separation chamber and a demister, and a heat transfer pipe is arranged in the evaporation chamber. Preferably, the seawater desalination module 15 and the power generation module 2 share one condensing device, that is, the fresh water condenser is the condenser 10. After being preheated by a preheater, seawater enters the inner wall of a heat transfer pipe from the top of the 1 st-effect evaporator, and heating steam is arranged outside the heat transfer pipe; gasification is generated by low pressure in the 1 st effect evaporator and heating steam. The heating steam is any one of high-temperature steam generated by a waste heat boiler 6 or an electric steam boiler 8 or partial extraction steam of a steam turbine 7. The secondary steam generated by seawater gasification and the falling salt water realize vapor-liquid separation in a separation chamber of the evaporator, and are guided to the next evaporator after being defoamed by the demister to repeat the heating process. The strong brine remained after evaporation flows into the evaporator of the next effect due to the pressure difference between the two effects. Distilled water generated by each effect flows through the tube space of each effect along the direction of pressure and temperature reduction, and meanwhile, heat is recovered until the distilled water is condensed by the condenser 10 to form product water to be pumped out. The corresponding strong brine is discharged from the bottom of the last effect evaporator. By the aid of the seawater desalination system utilizing waste heat of the gas turbine, waste heat of the power generation module 2 can be fully utilized, gradient utilization of energy is achieved, and the energy efficiency ratio of the system is improved; in addition, the products of the seawater desalination system using the waste heat of the combustion engine include electric power, fresh water and the like.
Example 3
As shown in fig. 3 and 4, the power generation module 2 is driven by an internal combustion engine 302 to generate power and is coupled with the seawater desalination module 15 to realize water and power cogeneration. A seawater desalination system utilizing waste heat of a gas turbine comprises a power grid control module 1, a power generation module 2 and a seawater desalination module 15, wherein the power grid control module 1 is respectively connected with the power generation module 2 and the seawater desalination module 15, and the seawater desalination module 15 is connected with the power generation module 2.
The power grid control module 1 is formed by sequentially connecting a power grid dispatching center 101, a power plant centralized control center 102 and an electric switch 103. The power grid dispatching center 101 issues an instruction to the power plant centralized control center 102 according to the market demand change, and the power plant centralized control center 102 issues a power supply instruction to the power generation module 2 according to the equipment operation parameters in the system; after receiving the power supply instruction, the power generation amount of the power generation module 2 is adjusted.
The power generation module 2 comprises a condenser 10, a low-pressure heater 11, a deaerator 12, a water feeding pump 13, a high-pressure heater 14 and an internal combustion engine 302 which are sequentially connected, the power generation module 2 further comprises a power generator 5, a booster station 9, a waste heat boiler 6 and a steam turbine 7, and the power generator 5 is respectively connected with the internal combustion engine 302 and the booster station 9. The internal combustion engine 302, the waste heat boiler 6, the steam turbine 7 and the generator 5 are connected in sequence. Preferably, the internal combustion engine 302 is connected to a compressor 4, and the compressor 4 is used for providing compressed air to the internal combustion engine 302. On one hand, the internal combustion engine 302 can directly drive the generator 5 to generate power, the power is boosted through the booster station 9 and then is connected to a power grid, and high-temperature flue gas (about 400 ℃) generated by the internal combustion engine 302 enters the seawater desalination module 15 after being converted into steam through the heat exchanger 16 or cylinder liner water (about 100 ℃) generated by the internal combustion engine 302 is directly used for evaporating seawater; on the other hand, part of the flue gas waste heat generated by the internal combustion engine 302 is recovered by the waste heat boiler 6 to generate steam, and the steam drives the steam turbine 7 to do work to drive the generator 5 to generate electricity and then is merged into the power grid; meanwhile, flue gas (100 ℃) generated by the waste heat boiler 6 exchanges heat with low-temperature steam or water to generate steam and low-pressure exhaust steam generated by the steam turbine 7 enters the seawater desalination module 15 through a pipeline to preheat seawater. The arrangement can recover part of waste heat generated by the internal combustion engine 302, and the energy efficiency ratio of the system is improved.
The seawater desalination module 15 adopts a multistage flash evaporation technology to carry out seawater desalination, and the seawater desalination module 15 is respectively connected with the internal combustion engine 302, the waste heat boiler 6, the steam turbine 7 and the low-pressure heater 11 through pipelines.
The seawater desalination module 15 comprises a plurality of flash chambers 17, fresh water condensers, vacuum pumps, first preheaters 19, first delivery pumps 18 and heat exchangers 16 which are arranged in series. There are 30 flash chambers 17. Heat exchange tubes are arranged in the flash chamber 17. The seawater is pumped into a first preheater 19 or a heat exchanger 16 through a first transfer pump 18, heated to a certain temperature and then sent into a flash chamber 17. Preferably, the seawater is preheated by a first preheater 19. The heat source of the first preheater 19 includes any one of high temperature steam or a part of extraction steam of the steam turbine 7 or liner water (about 100 c). The high-temperature steam comprises high-temperature steam generated by the waste heat boiler 6 or the electric steam boiler 8 or steam generated by heat exchange of high-temperature flue gas (about 400 ℃) generated by the internal combustion engine 302 through the heat exchanger 16. Preferably, the heat source of the first preheater 19 is cylinder liner water generated by the internal combustion engine 302. The flash chamber 17 forms a low-pressure environment which is lower than the saturated vapor pressure corresponding to the temperature of the hot brine through a vacuum pump; when the hot salt water enters the flash evaporation chamber 17, the hot salt water is rapidly and partially gasified due to overheating, so that the temperature of the hot salt water is reduced, the generated steam is condensed outside the heat exchange pipe to form fresh water, and the fresh water is temporarily stored after being cooled by the condenser. And the temperature of the remaining seawater is reduced to the corresponding saturation temperature. The heat source of the flash chamber 17 includes any one of high-temperature steam generated by the waste heat boiler 6 or partial extraction steam of the steam turbine 7 and liner water (about 100 ℃) generated by the internal combustion engine 302. Preferably, the heat source of the flash chamber is high-temperature steam generated by the waste heat boiler 6. Then, under the suction action of low pressure, the hot brine sequentially passes through the flash evaporation chambers 17 with gradually reduced pressure, and is gradually evaporated and cooled, and simultaneously, the brine is gradually enriched until the temperature of the brine is close to (but higher than) the temperature of the natural seawater. The corresponding strong brine is discharged from the bottom of the final effect flash chamber. By the aid of the seawater desalination system utilizing waste heat of the gas turbine, waste heat of the power generation module 2 can be fully utilized, gradient utilization of energy is achieved, and the energy efficiency ratio of the system is improved; in addition, the products of the seawater desalination system using the waste heat of the combustion engine include electric power, fresh water and the like.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The utility model provides an utilize sea water desalination of gas turbine waste heat, its characterized in that, including continuous power generation module (2) and sea water desalination module (15), power generation module (2) include compressor (4), gas turbine (3), exhaust-heat boiler (6), steam turbine (7), generator (5), compressor (4), gas turbine (3), exhaust-heat boiler (6), steam turbine (7) link to each other in proper order and set up, gas turbine (3), steam turbine (7) link to each other with generator (5) respectively and are used for the electricity generation, sea water desalination module (15) utilize the waste heat that power generation module (2) produced in order to prepare fresh water, the waste heat that power generation module (2) produced includes any one in flue gas waste heat, cylinder liner water waste heat, exhaust-heat boiler (6) production steam waste heat and steam turbine (7) production exhaust waste heat.
2. The seawater desalination system using the waste heat of the combustion engine as defined in claim 1, wherein the combustion engine (3) comprises any one of a gas turbine (301) or an internal combustion engine (302).
3. The seawater desalination system using the waste heat of the combustion engine as defined in claim 1, wherein the seawater desalination module (15) adopts any one of a low-temperature multi-effect evaporation technology or a multi-stage flash evaporation technology.
4. The seawater desalination system using the waste heat of the gas turbine as defined in claim 3, wherein the seawater desalination module (15) is any one of 4-effect, 5-effect, 6-effect, 7-effect, 8-effect, 9-effect or 10-effect evaporation devices adopting a low-temperature multi-effect evaporation technology.
5. The seawater desalination system using the waste heat of the combustion engine as defined in claim 1, wherein the waste heat of flue gas comes from any one of a gas turbine (301), a waste heat boiler (6) and an internal combustion engine (302).
6. The seawater desalination system using the waste heat of the gas turbine as claimed in claim 1, wherein the seawater desalination system using the waste heat of the gas turbine further comprises an electric steam boiler (8), the electric steam boiler (8) is respectively connected with the generator (5), the electric switch (103) and the seawater desalination module (15), and the power of the electric steam boiler (8) is steplessly adjusted within 0% -100%.
CN201920668648.4U 2019-05-10 2019-05-10 Seawater desalination system utilizing waste heat of gas turbine Active CN210176512U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920668648.4U CN210176512U (en) 2019-05-10 2019-05-10 Seawater desalination system utilizing waste heat of gas turbine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920668648.4U CN210176512U (en) 2019-05-10 2019-05-10 Seawater desalination system utilizing waste heat of gas turbine

Publications (1)

Publication Number Publication Date
CN210176512U true CN210176512U (en) 2020-03-24

Family

ID=69832933

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920668648.4U Active CN210176512U (en) 2019-05-10 2019-05-10 Seawater desalination system utilizing waste heat of gas turbine

Country Status (1)

Country Link
CN (1) CN210176512U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111573764A (en) * 2020-05-28 2020-08-25 山东建筑大学 Cold-hot coupling tower type seawater desalination system utilizing ship waste heat and application method
CN111908542A (en) * 2019-05-10 2020-11-10 赫普能源环境科技有限公司 Seawater desalination system and method utilizing waste heat of gas turbine
US20230109836A1 (en) * 2021-10-12 2023-04-13 Dongguan University Of Technology Distributed energy source system utilizing waste heat deeply

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111908542A (en) * 2019-05-10 2020-11-10 赫普能源环境科技有限公司 Seawater desalination system and method utilizing waste heat of gas turbine
CN111573764A (en) * 2020-05-28 2020-08-25 山东建筑大学 Cold-hot coupling tower type seawater desalination system utilizing ship waste heat and application method
US20230109836A1 (en) * 2021-10-12 2023-04-13 Dongguan University Of Technology Distributed energy source system utilizing waste heat deeply
US11802058B2 (en) * 2021-10-12 2023-10-31 Dongguan University Of Technology Distributed energy source system utilizing waste heat deeply

Similar Documents

Publication Publication Date Title
US8938966B2 (en) Storage of electrical energy with thermal storage and return through a thermodynamic cycle
CN202645658U (en) Fuel-steam-organic working medium combined cycle power generation unit
CN101696643B (en) Low-temperature heat energy recovering apparatus of heat and electricity co-generation and recovering method thereof
CN102022144B (en) Thermal power generation system with function of exhaust steam recovery
CN109681281B (en) Biomass cogeneration system capable of simultaneously recovering exhaust steam and flue gas waste heat
CN102219273B (en) Solar and thermocompression vapor-compression distillation type water purifying device
NO338864B1 (en) A method for increasing the efficiency of a gas turbine plant and a suitable gas turbine plant therefore
CN210176512U (en) Seawater desalination system utilizing waste heat of gas turbine
RU99128094A (en) EXHAUST GAS HEAT REGENERATION IN AN ORGANIC ENERGY CONVERTER USING THE INTERMEDIATE LIQUID CYCLE
CN102828791B (en) Thermal power plant and united thermodynamic system for thermal power plant
CN112627925B (en) A flexible power station based on supercritical carbon dioxide power cycle combined with seawater desalination and its regulation method
CN103967544A (en) Waste heat utilization system of gas-steam combined cycle generator set
KR20150050443A (en) Combined cycle power plant with improved efficiency
US20120175889A1 (en) Gas turbine combined cycle power plant and method thereof
CN103353239A (en) Improved lime kiln exhaust gas waste heat power generation system and power generation method thereof
CN102344178A (en) Thermal steam compression, evaporation and desalination system with function of steam reheating and method
CN105275616A (en) Combined heat, water and power generation system
CN111908542A (en) Seawater desalination system and method utilizing waste heat of gas turbine
CN105110400A (en) Turbine dead steam latent heat comprehensive utilization thermodynamic system
CN203594565U (en) Steam-driven driving system for solar thermal power generation large power pump
CN102267733A (en) Industrial waste heat low-temperature multi-effect seawater desalting system
CN205714295U (en) Based on supercritical carbon dioxide and the thermal electric generator of Steam Combined Cycle
KR20170138267A (en) System for recycling wasted heat of vessel
KR101935637B1 (en) Combined cycle power generation system
RU2561770C2 (en) Operating method of combined-cycle plant

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CP03 Change of name, title or address
CP03 Change of name, title or address

Address after: Room 201, 2 / F, building 12, No.18, Kechuang 13th Street, Daxing Economic and Technological Development Zone, Beijing 100176

Patentee after: HEPP Energy Environment Technology Co.,Ltd.

Address before: 100176 Beijing branch of Daxing District economic and Technological Development Zone thirteen Street No. 18 Building No. 12 hospital

Patentee before: Hep Energy and Environment Technology Co.,Ltd.