CN217236214U - Low-energy-consumption and water-saving seawater-fresh water combined circulating cooling system - Google Patents
Low-energy-consumption and water-saving seawater-fresh water combined circulating cooling system Download PDFInfo
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- CN217236214U CN217236214U CN202123166557.7U CN202123166557U CN217236214U CN 217236214 U CN217236214 U CN 217236214U CN 202123166557 U CN202123166557 U CN 202123166557U CN 217236214 U CN217236214 U CN 217236214U
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
The utility model provides a low energy consumption, water-saving sea water-fresh water combination circulative cooling system, it filters to supply to the sea water cistern storage through sea water filtration backwash sled to extract fresh sea water, sea water supplies to the sea water desalination system all the way in the sea water cistern and produces the demineralized water, the demineralized water is used for moisturizing for exhaust-heat boiler soda system moisturizing and closed fresh water circulative cooling system moisturizing, closed fresh water circulative cooling system circulative cooling turbo generator set lubricating oil cooler and generator air cooler; the other path of seawater in the seawater reservoir is supplied to a seawater cooling tower water pool through a seawater replenishing pump, seawater in the seawater cooling tower water pool circularly cools a steam turbine condenser through a seawater circulating pump, and closed fresh water circulating cooling water is cooled through a seawater-fresh water heat exchanger. Abundant seawater resources are fully utilized, local fresh water resources are not consumed, and the problem that the waste heat recovery power station of the gas turbine built in the offshore oil and gas field and the offshore terminal is limited by the lack of fresh water resources can be effectively solved.
Description
Technical Field
The utility model belongs to the technical field of gas turbine waste heat power generation, concretely relates to low energy consumption, water-saving sea water-fresh water combination circulative cooling system.
Background
The gas turbine generator set waste heat recycling and gas-steam combined cycle generator set is an energy-saving power generation technology widely adopted at present, and can greatly improve the energy utilization efficiency. The onshore combustion-evaporation combined cycle generator set needs a matched circulating cooling water system to cool a steam turbine and accessory equipment, the onshore combustion-evaporation combined cycle generator set generally adopts fresh water media to carry out circulating cooling, and for places where fresh water resources are scarce, such as offshore oil and gas fields, offshore terminals and the like, waste heat recovery of the gas turbine is utilized to build the combustion-evaporation combined cycle generator set, which is limited by fresh water resource conditions, if a seawater direct cooling system is adopted, namely seawater directly enters a heat exchanger through a seawater intake pump, and is directly discharged into the deep sea after heat exchange, the seawater intake pump has high energy consumption and poor economical efficiency. Therefore, the seawater-fresh water combined circulating cooling system is considered and researched, rich seawater resources are utilized, desalted water is produced through seawater desalination and is supplied to a steam power system and a closed circulating cooling water system, zero consumption of local fresh water can be realized through a seawater circulating cooling steam turbine condenser and a closed fresh water circulating system, the contradiction that a large amount of cooling water and fresh water resources are required to be consumed by a fuel-steam combined circulating generating set is solved, and energy consumption can be obviously reduced.
Disclosure of Invention
The utility model discloses a solve the marine oil gas development gas turbine waste heat recovery and fire-evaporate the contradiction that combined cycle generating set need consume a large amount of cooling water and fresh water resource and be short of, and then provide a low energy consumption, water-saving sea water-fresh water combined cycle cooling system.
The purpose of the utility model is realized like this: the system comprises a seawater filtering backwashing pry, a seawater reservoir, a seawater desalination device, a desalting water pump, a waste heat boiler, a turbo generator set, a condenser, a condensate pump, a seawater water replenishing pump, a seawater cooling tower, a seawater circulating pump, a seawater-fresh water plate type heat exchanger, a fresh water circulating pump, a lubricating oil cooler, a generator air cooler and a high-level water tank; pumping fresh seawater, filtering the fresh seawater by a seawater filtering backwashing pry, supplying the fresh seawater to a seawater reservoir for storage, supplying one path of seawater in the seawater reservoir to a seawater desalination system to produce desalted water, wherein the desalted water is used for replenishing water for a waste heat boiler steam-water system and replenishing water for a closed fresh water circulating cooling system, and the closed fresh water circulating cooling system circularly cools a lubricating oil cooler of a steam turbine generator unit and a generator air cooler; the other path of seawater in the seawater reservoir is supplied to a seawater cooling tower water pool through a seawater replenishing pump, seawater in the seawater cooling tower water pool circularly cools a steam turbine condenser through a seawater circulating pump, and closed fresh water circulating cooling water is cooled through a seawater-fresh water heat exchanger.
The utility model discloses still include such structural feature:
1. the shell of the seawater filtering backwashing sledge and the filter element are made of duplex stainless steel; the seawater reservoir is provided with a water inlet at the top, a water inlet pipeline is provided with a ball float valve, the valve is controlled to be opened and closed according to the water level of the seawater reservoir, the top of the reservoir is provided with a vent, and a water outlet is arranged at the bottom of the side wall of the reservoir.
2. The shell of the seawater filtering backwashing sledge and the filter element are made of duplex stainless steel; the seawater reservoir is provided with a water inlet at the top, a water inlet pipeline is provided with a ball float valve, the valve is controlled to be opened and closed according to the water level of the seawater reservoir, the top of the reservoir is provided with an air vent, and a water outlet is arranged at the bottom of the side wall of the reservoir.
3. The seawater desalination device comprises a water taking pump, a mechanical filter, a UF ultrafiltration membrane group, a primary reverse osmosis system, a secondary reverse osmosis system, an EDI (extended display identification data) membrane group and a demineralized water tank, and can produce demineralized water meeting the water quality required by standard specifications.
4. The desalting water pump is a centrifugal pump and is used for supplying the desalting water in the desalting water tank to the waste heat boiler, the condenser hot well and the closed type high-level water tank of the fresh water circulating cooling system.
5. The waste heat boiler adopts desalted water for water supply, and a heating surface absorbs the high-temperature exhaust heat of the gas turbine to generate superheated steam; the steam turbine is of a condensing type, and superheated steam enters the steam turbine to push the rotor to do work and drive the generator to generate electricity; the condenser is a shell-and-tube heat exchanger, the heat exchange tube is made of titanium tube materials, is resistant to seawater corrosion and is used for cooling exhaust steam after the steam turbine does work; the condensate pump is a centrifugal pump and is used for supplying water condensed in the condenser to the deaerator of the waste heat boiler.
6. The seawater cooling tower is a high-efficiency water-saving mechanical ventilation cooling tower and is made of glass fiber reinforced plastics; the cooling tower adopts novel plastic packing and is provided with a high-efficiency water removing and collecting device; the seawater circulating pump is made of duplex stainless steel and is used for supplying seawater in the seawater cooling tower pool to the condenser and the seawater-fresh water plate type heat exchanger.
7. The heat exchange plate sheet of the seawater-fresh water plate type heat exchanger is made of a titanium plate and is used for heat exchange between seawater and fresh water; the fresh water circulating pump is a centrifugal pump and is used for driving the closed fresh water circulating cooling system to cool the lubricating oil cooler and the generator air cooler in a circulating manner.
8. The lubricating oil cooler is made of stainless steel and used for cooling lubricating oil of the steam turbine generator unit; the generator air cooler equipment is made of stainless steel and is used for cooling the generator; the high-level water tank equipment is made of stainless steel and is used for supplementing demineralized water to the closed fresh water circulating cooling system; the seawater medium device and the pipeline of the system are made of glass fiber reinforced plastics, the valve is made of duplex stainless steel, and the gasket is made of polytetrafluoroethylene.
Compared with the prior art, the beneficial effects of the utility model are that: the system can be applied to the circulating cooling of the waste heat recovery steam turbine generator unit of the ocean oil and gas development gas turbine, fully utilizes the local rich seawater resources, does not need to consume local fresh water, solves the problem that the combustion-evaporation combined circulating generator unit needs to consume a large amount of cooling water and the shortage of fresh water resources, and can obviously reduce energy consumption.
Drawings
Fig. 1 is a diagram of a seawater-fresh water circulating cooling system of a waste heat recovery power station.
Fig. 2 is a flow chart of the seawater desalination and demineralized water treatment process of the present invention.
Fig. 3 is a diagram of the seawater circulating cooling system of the present invention.
Fig. 4 is a diagram of the closed fresh water circulating cooling system of the present invention.
The parts are numbered as follows: 1-seawater filtering backwashing prying; 2-a seawater reservoir; 3-a seawater desalination plant; 4-a desalting water pump; 5-a waste heat boiler; 6-a steam turbine generator unit; 7-a condenser; 8-a condensate pump; 9-seawater replenishing pump; 10-a seawater cooling tower; 11-a seawater circulating pump; 12-seawater-fresh water plate heat exchanger; 13-fresh water circulating pump; 14-a lubricant cooler; 15-generator air cooler; 16-high level water tank.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
A low energy and water saving type seawater-fresh water combined cycle cooling system, as shown in fig. 1, comprising: the seawater desalination system comprises a seawater filtering backwashing pry 1, a seawater reservoir 2, a seawater desalination device 3, a demineralized water pump 4, a waste heat boiler 5, a turbo generator unit 6, a condenser 7, a condensate pump 8, a seawater make-up pump 9, a seawater cooling tower 10, a seawater circulating pump 11, a seawater-fresh water plate type heat exchanger 12, a fresh water circulating pump 13, a lubricating oil cooler 14, a generator air cooler 15, a high-level water tank 16, pipelines, valves, instruments and the like. The system can fully utilize seawater resources to carry out the circulating cooling of the turbine generator unit of the gas turbine waste heat recovery power station, and does not consume local fresh water resources.
Fresh seawater is pumped, filtered by the seawater filtering backwashing pry 1, supplied to a water inlet of the seawater reservoir 2 along a glass fiber reinforced plastic pipeline connected with an outlet of the seawater filtering backwashing pry 1 and enters the seawater reservoir 2 for storage.
One water outlet of the seawater reservoir 2 is connected with a seawater desalination device 3 through a glass fiber reinforced plastic pipeline, and a flow chart of seawater desalination and desalted water treatment is shown in figure 2. Seawater in the seawater reservoir 2 is pumped by a water pump 31 to flow through a mechanical filter 32, a UF pressurizing 33, a UF membrane group 34, a first-stage reverse osmosis 35, a second-stage reverse osmosis 36, an EDI pressurizing pump 37 and an EDI membrane group 38 in sequence, enters EDI electrolysis high desalting and then is stored in a desalting water tank 39.
The demineralized water in the demineralized water tank is respectively supplied to the deaerator of the waste heat boiler 5 and the high-level water tank 16 of the closed fresh water circulating cooling system and the hot well of the condenser 7 through the demineralized water pump 4.
The heating surface of the waste heat boiler 5 absorbs the high-temperature exhaust heat of the gas turbine, heats the desalted water to generate superheated steam, and the superheated steam is conveyed to the steam turbine 6 through a steam pipeline.
The superheated steam enters a cylinder of the steam turbine 6 to push a rotor of the steam turbine to rotate to do work, a generator is driven to generate electricity, and exhaust steam after the work is done enters a condenser 7.
After heat exchange is carried out between exhaust steam in the shell pass of the condenser 7 and circulating seawater in the tube pass, the exhaust steam is cooled into condensed water, the condensed water is supplied into a deaerator of a waste heat boiler through a condensed water pump 8, and the high-temperature exhaust heat of the gas turbine is absorbed again to generate superheated steam; the circulating seawater is returned to the seawater cooling tower 10 after heat exchange and then enters the water pool after being cooled.
The seawater in the seawater reservoir 2 is supplied to a seawater cooling tower 10 through another water outlet by a seawater make-up pump 9.
Seawater in a water pool of the seawater cooling tower 10 is supplied to the condenser 7 and the seawater-fresh water plate type heat exchanger 12 through the seawater circulating pump 11, exhaust steam in the condenser 7 is cooled in a circulating mode, and cooling water in the closed fresh water circulating cooling system is cooled through the seawater-fresh water plate type heat exchanger 12.
The heat medium of the seawater-fresh water plate heat exchanger 12 is closed fresh water circulating cooling water, the cold medium is circulating seawater, the fresh water cooling water after heat exchange and temperature reduction continuously and circularly cools the lubricating oil cooler 14 and the generator air cooler 15, and the seawater after heat exchange and temperature rise returns to the seawater cooling tower 10 along the glass steel pipeline to be cooled and then enters the water pool.
The high-level water tank 16 is used for replenishing water for the closed type fresh water circulating cooling system, and the lubricating oil cooler 14 and the generator air cooler 15 are circularly cooled through the fresh water circulating pump 13.
The seawater after the heat exchange is circulated returns to the upper part of the seawater cooling tower 10, heat is dissipated through the water spraying filler, meanwhile, the damp and hot air is discharged out of the tower through a fan at the top of the cooling tower 10, the seawater is cooled, and the cooled seawater enters a bottom water pool. The efficient water collector arranged in the seawater cooling tower can greatly reduce the loss of floating water.
The seawater filtering backwashing sledge shell and the filter element are made of duplex stainless steel, are seawater corrosion resistant, have an online backwashing function and can reduce maintenance and repair times. The seawater reservoir is provided with a water inlet at the top, a water inlet pipeline is provided with a ball float valve, the valve can be controlled to be opened and closed according to the water level of the seawater reservoir, the top of the reservoir is provided with an air vent, and a water outlet is arranged at the bottom of the side wall of the reservoir. The seawater desalination device comprises a water taking pump, a mechanical filter, a UF ultrafiltration membrane group, a primary reverse osmosis system, a secondary reverse osmosis system, an EDI group and a demineralized water tank, and can produce demineralized water meeting the water quality required by standard specifications. The desalting water pump is a centrifugal pump and is used for supplying the desalting water in the desalting water tank to the waste heat boiler, the condenser hot well and the closed type high-level water tank of the fresh water circulating cooling system. The waste heat boiler adopts demineralized water for water supply, and the heating surface absorbs the high-temperature exhaust heat of the gas turbine to generate superheated steam. The steam turbine is of a condensing type, superheated steam enters the steam turbine to push the rotor to do work, and the generator is driven to generate electricity. The condenser is a shell-and-tube heat exchanger, the heat exchange tubes are made of titanium tubes, seawater corrosion resistance is achieved, and the condenser is used for cooling exhaust steam after the steam turbine applies work. The condensate pump is a centrifugal pump and is used for supplying water condensed in the condenser to the deaerator of the waste heat boiler. The seawater replenishing pump through-flow component is made of duplex stainless steel, is resistant to seawater corrosion, and is used for supplying seawater in the seawater reservoir to the water pool of the seawater cooling tower. The seawater cooling tower is a high-efficiency water-saving mechanical ventilation cooling tower made of glass fiber reinforced plastics and is resistant to seawater corrosion. The cooling tower adopts novel plastic packing, so that the heat exchange efficiency of the cooling tower can be improved; the resistance of airflow in the tower can be reduced by adopting a pipe type combined water distribution mode; in order to reduce the influence of the drift on the environment and save water, the cooling tower is provided with a high-efficiency water removing and collecting device. The seawater circulating pump is made of duplex stainless steel, is resistant to seawater corrosion, and is used for supplying seawater in a seawater cooling tower pool to the condenser and the seawater-fresh water plate type heat exchanger. The heat exchange plate sheet of the seawater-fresh water plate type heat exchanger is made of a titanium plate, can resist seawater corrosion and is used for seawater and fresh water heat exchange. The fresh water circulating pump is a centrifugal pump and is used for driving the cooling water circulation cooling lubricating oil cooler and the generator air cooler of the closed fresh water circulation cooling system. The lubricating oil cooler equipment is made of stainless steel and is used for cooling lubricating oil of the steam turbine generator unit. The generator air cooler equipment is made of stainless steel and used for cooling the generator. The high-level water tank equipment is made of stainless steel and is used for supplementing demineralized water to the closed type fresh water circulating cooling system. The seawater medium device and the pipeline of the system are made of glass fiber reinforced plastics, the valve is made of duplex stainless steel, and the gasket is made of polytetrafluoroethylene.
The system extracts fresh seawater, and the fresh seawater is filtered, backwashed and pried by the seawater and is supplied to the seawater reservoir, the seawater reservoir can store a certain amount of seawater, and a seawater suction pump does not need to continuously operate. Seawater in the seawater storage tank of the system is supplied to a seawater desalination device all the way, desalted water meeting the standard requirement of water quality can be produced and used for water supplement of a waste heat boiler, and superheated steam generated by the waste heat boiler is conveyed to a turbo generator unit to do work for power generation. The demineralized water is also supplied to a closed fresh water circulating cooling system, and a lubricating oil cooler and a generator air cooler of the steam turbine generator unit are circularly cooled. And the other path of seawater in the system is supplied to a seawater cooling tower pool through a seawater replenishing pump, and then the seawater in the seawater cooling tower pool is supplied to a steam turbine condenser and a seawater-fresh water plate type heat exchanger through a seawater circulating pump, and fresh water media in the steam turbine condenser and the closed fresh water circulating cooling system are cooled by seawater circulation.
To sum up, the utility model discloses a low energy consumption, water-saving sea water-fresh water combination circulative cooling system, including sea water filtration backwash sled, sea water cistern, sea water desalination device, desalination water pump, exhaust-heat boiler, turbo generator set, condenser, condensate pump, sea water moisturizing pump, sea water cooling tower, sea water circulating pump, sea water-fresh water plate heat exchanger, fresh water circulating pump, lubricating oil cooler, generator air cooler and high-order water tank. Pumping fresh seawater, filtering the fresh seawater by a seawater filtering backwashing pry, supplying the fresh seawater to a seawater reservoir for storage, supplying one path of seawater in the seawater reservoir to a seawater desalination system to produce desalted water, wherein the desalted water is used for replenishing water for a waste heat boiler steam-water system and replenishing water for a closed fresh water circulating cooling system, and the closed fresh water circulating cooling system circularly cools a lubricating oil cooler of a steam turbine generator unit and a generator air cooler; the other path of seawater in the seawater reservoir is supplied to a seawater cooling tower water pool through a seawater replenishing pump, seawater in the seawater cooling tower water pool circularly cools a steam turbine condenser through a seawater circulating pump, and closed fresh water circulating cooling water is cooled through a seawater-fresh water heat exchanger. Abundant seawater resources are fully utilized, local fresh water resources are not consumed, and the problem that the waste heat recovery power station of the gas turbine built in the offshore oil and gas field and the offshore terminal is limited by the lack of fresh water resources can be effectively solved.
Claims (8)
1. A low energy consumption, water-saving sea water-fresh water combination circulative cooling system which characterized in that: the system comprises a seawater filtering backwashing pry, a seawater reservoir, a seawater desalination device, a desalting water pump, a waste heat boiler, a turbo generator set, a condenser, a condensate pump, a seawater water replenishing pump, a seawater cooling tower, a seawater circulating pump, a seawater-fresh water plate type heat exchanger, a fresh water circulating pump, a lubricating oil cooler, a generator air cooler and a high-level water tank; fresh seawater is extracted and filtered by a seawater filtering, backwashing and prying device to be stored in a seawater reservoir, one path of seawater in the seawater reservoir is supplied to a seawater desalination system to produce desalted water, the desalted water is used for replenishing water for a waste heat boiler steam-water system and replenishing water for a closed fresh water circulating cooling system, and the closed fresh water circulating cooling system circularly cools a lubricating oil cooler of a steam turbine generator unit and a generator air cooler; the other path of seawater in the seawater reservoir is supplied to a seawater cooling tower water pool through a seawater replenishing pump, seawater in the seawater cooling tower water pool circularly cools a steam turbine condenser through a seawater circulating pump, and closed fresh water circulating cooling water is cooled through a seawater-fresh water heat exchanger.
2. A low energy and water saving combined seawater-fresh water recirculating cooling system as claimed in claim 1, wherein: the shell of the seawater filtering backwashing sledge and the filter element are made of duplex stainless steel; the seawater reservoir is provided with a water inlet at the top, a water inlet pipeline is provided with a ball float valve, the valve is controlled to be opened and closed according to the water level of the seawater reservoir, the top of the reservoir is provided with a vent, and a water outlet is arranged at the bottom of the side wall of the reservoir.
3. A low energy and water saving combined seawater-fresh water recirculating cooling system as claimed in claim 1, wherein: the seawater desalination device comprises a water taking pump, a mechanical filter, a UF ultrafiltration membrane group, a primary reverse osmosis system, a secondary reverse osmosis system, an EDI (extended display identification data) membrane group and a demineralized water tank, and can produce demineralized water meeting the water quality required by standard specifications.
4. A low energy and water saving combined seawater-fresh water recirculating cooling system as claimed in claim 1, wherein: the desalting water pump is a centrifugal pump and is used for supplying the desalting water in the desalting water tank to the waste heat boiler, the condenser hot well and the closed type high-level water tank of the fresh water circulating cooling system.
5. A low energy and water saving combined seawater-fresh water recirculating cooling system as claimed in claim 1, wherein: the waste heat boiler adopts demineralized water for water supply, and a heating surface absorbs the high-temperature exhaust heat of the gas turbine to generate superheated steam; the steam turbine is of a condensing type, and superheated steam enters the steam turbine to push the rotor to do work and drive the generator to generate electricity; the condenser is a shell-and-tube heat exchanger, the heat exchange tube is made of titanium tube materials, is resistant to seawater corrosion and is used for cooling exhaust steam after the steam turbine does work; the condensate pump is a centrifugal pump and is used for supplying water condensed in the condenser to the deaerator of the waste heat boiler.
6. A low energy and water saving combined seawater-fresh water recirculating cooling system as claimed in claim 1, wherein: the seawater cooling tower is a high-efficiency water-saving mechanical ventilation cooling tower and is made of glass fiber reinforced plastics; the cooling tower adopts novel plastic packing and is provided with a high-efficiency water removing and collecting device; the seawater circulating pump is made of duplex stainless steel and is used for supplying seawater in the seawater cooling tower pool to the condenser and the seawater-fresh water plate type heat exchanger.
7. A low energy and water saving combined seawater-fresh water recirculating cooling system as claimed in claim 1, wherein: the heat exchange plate sheet of the seawater-fresh water plate type heat exchanger is made of a titanium plate and is used for heat exchange between seawater and fresh water; the fresh water circulating pump is a centrifugal pump and is used for driving the cooling water circulation cooling lubricating oil cooler and the generator air cooler of the closed fresh water circulation cooling system.
8. A low energy and water saving combined seawater-fresh water recirculating cooling system as claimed in claim 1, wherein: the lubricating oil cooler is made of stainless steel and used for cooling lubricating oil of the steam turbine generator unit; the generator air cooler equipment is made of stainless steel and is used for cooling the generator; the high-level water tank equipment is made of stainless steel and is used for supplementing demineralized water to the closed fresh water circulating cooling system; the seawater medium device and the pipeline of the system are made of glass fiber reinforced plastics, the valve is made of duplex stainless steel, and the gasket is made of polytetrafluoroethylene.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123166557.7U CN217236214U (en) | 2021-12-13 | 2021-12-13 | Low-energy-consumption and water-saving seawater-fresh water combined circulating cooling system |
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| CN202123166557.7U CN217236214U (en) | 2021-12-13 | 2021-12-13 | Low-energy-consumption and water-saving seawater-fresh water combined circulating cooling system |
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