CN106152596A - A kind of cold end comprehensive energy-saving system for thermal power plant - Google Patents
A kind of cold end comprehensive energy-saving system for thermal power plant Download PDFInfo
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- CN106152596A CN106152596A CN201610662088.2A CN201610662088A CN106152596A CN 106152596 A CN106152596 A CN 106152596A CN 201610662088 A CN201610662088 A CN 201610662088A CN 106152596 A CN106152596 A CN 106152596A
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- heat exchanger
- water
- pipe heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B19/00—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour
- F25B19/02—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour using fluid jet, e.g. of steam
- F25B19/04—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour using fluid jet, e.g. of steam using liquid jet, e.g. of water
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a kind of cold end comprehensive energy-saving system for thermal power plant, capital equipment includes vaporizer, first order steam jet ejector, second level steam jet ejector etc., first order pipe heat exchanger, second level pipe heat exchanger etc..The present invention uses evaporation tank, makes the water in vaporizer evaporate at low boiling by steam jet ejector evacuation, takes away heat to reduce the temperature of recirculated water；To condense water as cooling water, reclaim the heat of auxiliary vapour and recirculated water backwater to condensate system by heat exchange mode, and then make power plant's effectiveness of regenerator be improved.Present invention, avoiding the huge power consumption utilizing electric energy to obtain chilled water in traditional design, achieve auxiliary vapour and the purpose of heat recovery in recirculated water backwater again, evade the heat waste that in traditional design, this partial heat can only be caused by cooling tower heat exchange, belong to two-way energy-conserving and environment-protective comprehensive utilization.
Description
Technical field
The present invention relates to a kind of energy conserving system, be specifically related to the cold end comprehensive energy-saving system in a kind of thermal power plant.
Background technology
In thermal power plant, cold end system as one of requisite system of power plant, the work of each equipment in system
Situation affects the power of unit not only by back pressure, and affects station service by subsidiary engine power consumption.Therefore, the cold end system from power plant
System is set about, and improves the cold end performance of unit, it is achieved economy optimization runs, and puts into little, instant effect, is power plant for energy conservation consumption reduction, carries
High unit heat economy, realize the optimal path of maximizing the benefits.
In traditional design, gland heater, the low heat transmission equipment that adds etc. are that steam condensation becomes Water Sproading, and in steam
Heat all got rid of by cooling tower heat exchange, cause great energy waste.It addition, as the weight affecting cold end system efficiency
Wanting one of factor, the control of cooling water temperature seems especially prominent.The application of chilled water can be effectively improved condenser, axle envelope heating
Device, the low heat exchange efficiency added etc., and then make the vacuum of unit improve, coal consumption reduces.But traditional obtains chilled water with electric energy
Mode high cost, and have influence on the station service power consumption rate of whole power plant.How to use certain means to obtain chilled water, become
The problem of our research.
CN103334969A (publication date is on October 02nd, 2013) discloses one can make condenser vacuum tie up all the time
Holding at high-caliber modified model condenser vacuum system, it uses steam jet ejector individually to control single condenser, or controls
Several condensers being in parallel, are connected to the port of export of condenser on water ring vacuum pump, the export pipeline of water ring vacuum pump
Upper connection constitutes the steam-water separator of vacuum system, working solution heat exchanger with it.
Although the using effect of above-mentioned prior art is preferable, it is also possible to the needs of satisfied most clients, but no matter
From principle or in application, all there is the biggest room for promotion: such as from existing recirculated water, extract heat so that
Circulating water temperature is reduced；How while circulating water cooling, to obtain a large amount of chilled water；How will obtain from recirculated water
Heat for heat-setting water, and the condensation water after heating returned on the premise of not increasing condensate pump output coagulate
Bear water system.
The cold end segment of whole power plant can be changed into comprehensive utilization so that economical, the safety of whole unit from unidirectional utilization
The aspects such as reliability obtain certain improvement and optimization, the original intention place of this present invention just.
Summary of the invention
For the above-mentioned technical problem overcoming prior art to exist, the present inventor is through further investigation, it is provided that a kind of structure
Simply, the cold end comprehensive energy-saving system with excellent in economic efficiency and stability that heat energy recovery rate height, heat integration recycle.
The present invention reaches, by reduction vaporization mode, purpose of freezing, and extracts heat, can return to coagulate by mode of heating by this heat again
Bear water system, really realize the purpose of thermal power plant cold end synthesis energy saving.
The present invention is achieved through the following technical solutions, a kind of cold end comprehensive energy-saving system for thermal power plant, including:
Using recirculated water as the refrigeration unit of heat transferring medium, to condense the water heat recovery unit as cooling water source；With circulating water
The circulating water line that system connects, the power steam pipeline connected with auxiliary steam；The cooling water pipeline of heat recovery unit is in parallel
Condensate line in gland heater；It is characterized in that: also include vaporizer, first order steam jet ejector, second level steam
Ejector, first order pipe heat exchanger, second level pipe heat exchanger；Described first order steam jet ejector and described vaporizer, institute
State power steam pipeline to be connected；The outlet of described first order steam jet ejector is connected to the vapour of described first order pipe heat exchanger
At side entrance；Described second level steam jet ejector steams with the vapour side outlet of described first order pipe heat exchanger, described power respectively
Vapor pipeline is connected, and the outlet of described second level steam jet ejector is connected to the vapour side entrance of described second level pipe heat exchanger
Place；The vapour side outlet of described second level pipe heat exchanger is discharged into air；Described first order pipe heat exchanger, second level pipe type heat transfer
Device uses condensation water as cooling water, is extracted the heat of auxiliary vapour and recirculated water backwater by heat exchange mode, and returns condensation water system
System, described first order pipe heat exchanger, second level pipe heat exchanger condensing hot air furnace to condenser hotwell.
Preferably, described first order pipe heat exchanger, the cooling water pipeline of described second level pipe heat exchanger are parallel to " solidifying
Bear water pump → gland heater → low-pressure heater " pipeline above, the most additionally increase condensate pump output loading premise
Can realize down being transferred to condense water by heat exchange mode by the heat in the steam extracted out from vaporizer and power steam,
Condense water and return condensate system (home position is between gland heater and low-pressure heater), it is achieved by full for auxiliary vapour heat
The purpose reclaimed.
Preferably, described vaporizer passes through low pressure evaporation technique, and recirculated water backwater heat recovery is realized the cold end segment of power plant
Can transform, and obtain chilled water.
Preferably, the water side entrance end of described first order pipe heat exchanger and second level pipe heat exchanger is all from condensing water system
System intercepts and condenses water, returns again to condensate system after heat exchange.
Compared with prior art, beneficial effects of the present invention is as follows:
(1) present invention passes through multistage steam ejector to vaporizer evacuation to reduce the boiling point of internal water, reaches to make steaming
Send out the water within device to be evaporated under reduced pressure, utilize evaporation to take away substantial amounts of heat and make circulating water temperature be reduced, simultaneously in vaporizer
Portion produces and a large amount of completes liquid after heat exchange, completes liquid temp the lowest, and becoming can the chilled water of electric power supply plant application.
(2) pipe heat exchanger of the present invention uses condensation water as cooling water, condenses water and reclaims steaming by the way of heat exchange
Heat in auxiliary vapour that vapour ejector brings and vaporizer, returns again to condensate system, makes the effectiveness of regenerator of heat regenerative system obtain
Improve, be different from conventional vapor injection vacuum system pipe heat exchanger and use recirculated water or opened water as cooling water, it is to avoid
Cooled down by cooling tower again after recirculated water or opened water temperature rise and cause the loss of heat.
(3) the nucleus equipment vaporizer of the present invention, steam jet ejector and pipe heat exchanger no-rotary part, not power consumption, fortune
Line stabilization, improves system economy and the safety of whole power plant, has energy-saving and cost-reducing, safe and reliable to operation, non-maintaining
Advantage.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
In figure: 1 be circulating water line, 2 for power steam pipeline, 3 for vaporizer, 4 for condensate pump, 5 for axle envelope heat
Device, 6 for low-pressure heater, 7-1 be first order steam jet ejector, 7-2 be second level steam jet ejector, 8-1 be first order tubular type
Heat exchanger, 8-2 be second level pipe heat exchanger, 9 for emptying, 10-1 and 10-2 be condenser hotwell, 11 for vaporizer moisturizing, 12
For chilled water output, 13 be condensate line.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.Following example will assist in the technology of this area
Personnel are further appreciated by the present invention, but limit the present invention the most in any form.It should be pointed out that, the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement.These broadly fall into the present invention
Protection domain.
The cold end comprehensive energy-saving system for thermal power plant as shown in Figure 1, including: the circulation connected with vaporizer 3
Power steam pipeline 2 that water lines 1 connects with auxiliary steam, it is parallel to the condensate line 13 of gland heater 5, the first order
Steam jet ejector 7-1, second level steam jet ejector 7-2, first order pipe heat exchanger 8-1, second level pipe heat exchanger 8-2, solidifying
Bear water pump 4, gland heater 5 and low-pressure heater 6；First order steam jet ejector 7-1 respectively with vaporizer 3, power steam pipe
Road 2 is connected, and the outlet of first order steam jet ejector 7-1 is connected at the vapour side entrance of first order pipe heat exchanger 8-1；Second
Level steam jet ejector 7-2 is connected with vapour side outlet, the power steam pipeline 2 of first order pipe heat exchanger 7-1 respectively, the second level
The outlet of steam jet ejector 7-2 is connected at the vapour side entrance of second level pipe heat exchanger 8-2, second level pipe heat exchanger 8-2
Vapour side outlet be discharged into air (emptying 9), first order pipe heat exchanger 8-1, the cooling water pipeline of second level pipe heat exchanger 8-2
It is parallel to the top of condensate line 13 (pipeline of condensate pump 4 → gland heater, 5 → low-pressure heater 6), passes through heat exchange
Temperature rise returns again to condensate system, condensing hot air furnace to condenser hotwell 10-1 and 10-2, when vaporizer 3 water level inside is too low,
Can be evaporated device moisturizing 11, vaporizer 3 is produced by reduction vaporization and completes liquid in a large number, is available for chilled water output 12.
First order steam jet ejector, second level steam jet ejector, with steam as dynamic medium, produce super by power jet
Velocity of sound jet, causes vacuum in head chamber, extracts the vapour gas mixture in vaporizer, first order pipe heat exchanger respectively,
The vapour gas mixture being drawn out of in power steam and vaporizer enters pipe heat exchanger, and pipe heat exchanger carries out cold by condensing water
But, condense the heat in the auxiliary vapour that brings by heat exchange form recovered steam ejector of water and vaporizer to condensate system, manage
The condensing hot air furnace of formula heat exchanger is to condenser hotwell.
Above the specific embodiment of the present invention is described.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformation or amendment within the scope of the claims, this not shadow
Ring the flesh and blood of the present invention.
Claims (3)
1. for the cold end comprehensive energy-saving system in thermal power plant, including: using recirculated water as the refrigeration list of heat transferring medium
Unit, to condense the water heat recovery unit as cooling water source；The circulating water line connected with circulation, with auxiliary steam
The power steam pipeline connected；The cooling water pipeline of heat recovery unit is parallel to the condensate line of gland heater；It is special
Levy and be: also include vaporizer, first order steam jet ejector, second level steam jet ejector, first order pipe heat exchanger, the second level
Pipe heat exchanger；Described first order steam jet ejector is connected with described vaporizer, described power steam pipeline；The described first order
The outlet of steam jet ejector is connected at the vapour side entrance of described first order pipe heat exchanger；Described second level steam jet ejector divides
Not being connected with the vapour side outlet of described first order pipe heat exchanger, described power steam pipeline, described second level steam sprays
The outlet of device is connected at the vapour side entrance of described second level pipe heat exchanger；The vapour side outlet of described second level pipe heat exchanger
It is discharged into air；Described first order pipe heat exchanger, second level pipe heat exchanger employing condensation water is as cooling water, by heat exchange side
Formula extracts the heat of auxiliary vapour and recirculated water backwater, and returns condensate system, described first order pipe heat exchanger, second level tubular type
The condensing hot air furnace of heat exchanger is to condenser hotwell.
A kind of cold end comprehensive energy-saving system for thermal power plant, it is characterised in that: described
One-level pipe heat exchanger, the cooling water pipeline of described second level pipe heat exchanger be parallel to " condensate pump → gland heater →
Low-pressure heater " pipeline above.
A kind of cold end comprehensive energy-saving system for thermal power plant, it is characterised in that: institute
The water side entrance end stating first order pipe heat exchanger and second level pipe heat exchanger all intercepts condensation water, heat exchange from condensate system
After return again to condensate system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610662088.2A CN106152596A (en) | 2016-08-12 | 2016-08-12 | A kind of cold end comprehensive energy-saving system for thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610662088.2A CN106152596A (en) | 2016-08-12 | 2016-08-12 | A kind of cold end comprehensive energy-saving system for thermal power plant |
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| Publication Number | Publication Date |
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| CN106152596A true CN106152596A (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610662088.2A Pending CN106152596A (en) | 2016-08-12 | 2016-08-12 | A kind of cold end comprehensive energy-saving system for thermal power plant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110006190A (en) * | 2019-04-16 | 2019-07-12 | 程琛 | A kind of cooling water temperature system and cool-down method |
| CN110108133A (en) * | 2018-12-24 | 2019-08-09 | 程琛 | A kind of connection of the steam-sprayed pumped vacuum systems cooling water heat exchanger of condenser and heat recovery method |
| CN113540619A (en) * | 2021-08-11 | 2021-10-22 | 西安西热锅炉环保工程有限公司 | Water cooling system of energy storage system of thermal power plant and working method |
-
2016
- 2016-08-12 CN CN201610662088.2A patent/CN106152596A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108133A (en) * | 2018-12-24 | 2019-08-09 | 程琛 | A kind of connection of the steam-sprayed pumped vacuum systems cooling water heat exchanger of condenser and heat recovery method |
| CN110006190A (en) * | 2019-04-16 | 2019-07-12 | 程琛 | A kind of cooling water temperature system and cool-down method |
| CN113540619A (en) * | 2021-08-11 | 2021-10-22 | 西安西热锅炉环保工程有限公司 | Water cooling system of energy storage system of thermal power plant and working method |
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