CN111578258A - Device capable of improving energy utilization rate of thermal power plant in non-heating period and use method - Google Patents
Device capable of improving energy utilization rate of thermal power plant in non-heating period and use method Download PDFInfo
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- CN111578258A CN111578258A CN202010497763.7A CN202010497763A CN111578258A CN 111578258 A CN111578258 A CN 111578258A CN 202010497763 A CN202010497763 A CN 202010497763A CN 111578258 A CN111578258 A CN 111578258A
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- Prior art keywords
- lithium bromide
- heat pump
- bromide absorption
- condenser
- absorption 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
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
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- 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
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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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
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention discloses a device capable of improving the energy utilization rate of a thermal power plant in a non-heating period and a using method thereof. According to the invention, the lithium bromide absorption heat pump is arranged behind the condenser, so that condensed water and boiler water can be directly connected with the inlet of the lithium bromide absorption heat pump, the hot water outlet of the lithium bromide absorption heat pump is connected with the deaerator, the lithium bromide absorption heat pump can use steam as a driving heat source, and after components such as a condenser and an absorber in the lithium bromide absorption heat pump enter the working state through the driving heat source, the boiler water can be heated through a heat exchange mode, so that the low-temperature waste heat of a power plant system can be recycled.
Description
Technical Field
The invention relates to the technical field of energy technology devices, in particular to a device capable of improving the energy utilization rate of a thermal power plant in a non-heating period and a using method thereof.
Background
At present, the electric power industry in China mainly focuses on thermal power generation, and along with the aggravation of world energy crisis, the continuous rising of the price of traditional energy and the enhancement of global environmental protection consciousness, energy conservation and emission reduction technologies are more and more emphasized. The thermal power plant has a large amount of low-temperature waste heat in the production process, can utilize it to heat the user heating through waste heat recovery device in winter, but when the non-heating period does not have the heat supply demand, still have a large amount of heats directly to discharge into the atmosphere through the cooling tower, simultaneously a large amount of comdenstion water and system moisturizing must pass through the heating again and just can deliver to the boiler, the method commonly used at present sets up the oxygen-eliminating device before the boiler intake, utilize steam to heat the boiler intake and heat up, but this type of method can not carry out recycle to the low-temperature waste heat of power plant.
Disclosure of Invention
The invention mainly aims to provide a device capable of improving the energy utilization rate of a thermal power plant in a non-heating period and a using method thereof, which can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a can improve device of steam power plant energy utilization rate in non-heating period, includes lithium bromide absorption heat pump, condenser, governing valve and cooling tower, lithium bromide absorption heat pump sets up the one end rear at the condenser, the both ends of cooling tower all are connected with the condenser.
Furthermore, a hot water outlet at one end of the lithium bromide absorption heat pump is connected with a deaerator, and an evaporator inside the lithium bromide absorption heat pump is connected with a cooling water outlet at one end of a condenser.
Furthermore, the number of the adjusting valves is two, and the adjusting valves are arranged between the lithium bromide absorption heat pump and the condenser.
A method for improving the energy utilization rate of a thermal power plant in a non-heating period comprises the following steps;
the method comprises the following steps: and (4) exhausting by the steam turbine, and enabling the exhausted gas to enter a condenser.
Step two: after the gas enters the condenser, when the gas contacts the surface of the heat exchange tube in the condenser, the gas is cooled by water flow in the heat exchange tube to become water, and the heat is absorbed by the heat exchange tube.
Step three: the temperature of the condensed water after absorption is 38 ℃, and the condensed water enters the lithium bromide absorption heat pump.
Step four: and a part of the cooling water in the second step flows into the cooling tower, the cooling water flows in the cooling tower and contacts with air to perform heat exchange to generate steam, the heat is taken away through steam volatilization, the effect of cooling is realized, a part of the cooling water in the second step enters the lithium bromide absorption heat pump, the heat is taken away through steam volatilization in an evaporator of the lithium bromide absorption heat pump, and the effect of cooling is also realized.
Step five: after the temperature is reduced, cooling water is discharged from the cooling tower and flows into the condenser, so that the recycling effect is realized.
Step six: and the external driving steam enters the lithium bromide absorption heat pump and is converged with the heat entering the lithium bromide absorption heat pump in the fourth step, so that the generator and the evaporator in the lithium bromide absorption heat pump work.
Step seven: the generator and the evaporator in the lithium bromide absorption heat pump absorb the heat of the driving steam and the cooling water, and then the heat is exchanged with the condensed water through the condenser and the absorber, so that the condensed water passing through the lithium bromide absorption heat pump is heated to 80 ℃ and then discharged.
Step eight: the adjusting valve is opened, the amount of water entering the lithium bromide absorption heat pump is controlled by the adjusting valve, the cooling water passes through the evaporator inside the lithium bromide absorption heat pump, the evaporator enables the high-temperature cooling water to exchange heat with the inside steam, the cooling water is gasified to absorb heat, the effect of refrigeration and cooling is achieved, and the cooling water after cooling transfers heat to hot water.
Step nine: and cooling water is mixed with cooling water at the outlet of the condenser and then enters the cooling tower to be continuously cooled, so that circulation is further realized.
Compared with the prior art, the invention has the following beneficial effects:
(1): the invention is convenient for enabling condensation water and boiler water to be directly connected with an inlet of the lithium bromide absorption heat pump by arranging the lithium bromide absorption heat pump at the rear part of the condenser, and a hot water outlet of the lithium bromide absorption heat pump is connected with the deaerator, so that the lithium bromide absorption heat pump can use steam as a driving heat source, and can heat boiler water by a heat exchange mode after components such as a condenser, an absorber and the like in the lithium bromide absorption heat pump enter into work by driving the heat source, thereby recycling low-temperature waste heat of a power plant system, compared with the traditional method of arranging the deaerator before boiler water inlet, the invention not only can realize the effect of energy utilization, but also has higher integral energy utilization rate, and by arranging the regulating valve, because the load of a cooling tower of a general power plant in a non-heating period is larger, the flow of cooling water can be controlled by the regulating valve, thereby reducing the load on the cooling tower.
Drawings
Fig. 1 is a schematic diagram of the overall system of the present invention.
In the figure: 1. a lithium bromide absorption heat pump; 2. a condenser; 3. adjusting a valve; 4. and (5) cooling the tower.
Detailed Description
Technical means for implementing the present invention; authoring features; the purpose and function of the present invention will be readily apparent from the following detailed description.
As shown in fig. 1, a device capable of improving energy utilization rate of a thermal power plant in a non-heating period comprises a lithium bromide absorption heat pump 1, a condenser 2, a regulating valve 3 and a cooling tower 4, wherein the lithium bromide absorption heat pump 1 is arranged behind one end of the condenser 2, and two ends of the cooling tower 4 are connected with the condenser 2.
The hot water outlet at one end of the lithium bromide absorption heat pump 1 is connected with a deaerator, and the evaporator inside the lithium bromide absorption heat pump 1 is connected with the cooling water outlet at one end of the condenser 2.
The number of the adjusting valves 3 is two, and the adjusting valves 3 are arranged between the lithium bromide absorption heat pump 1 and the condenser 2.
A method for improving the energy utilization rate of a thermal power plant in a non-heating period comprises the following steps;
the method comprises the following steps: the turbine exhausts and the exhaust gas enters the condenser 2.
Step two: after the gas enters the condenser 2, when the gas contacts the surface of the heat exchange tube in the condenser 2, the gas is cooled by water flow in the heat exchange tube to become water, and the heat is absorbed by the heat exchange tube.
Step three: the temperature of the condensed water after absorption is 38 ℃, and the condensed water enters the lithium bromide absorption heat pump 1 again.
Step four: and a part of the cooling water in the second step flows into the cooling tower, heat exchange is carried out to generate steam after the cooling water flows and contacts with air in the cooling tower, and heat is taken away through steam volatilization, so that the effect of cooling is realized. And a part of the cooling water in the second step enters the lithium bromide absorption heat pump 1, and heat is taken away in an evaporator of the lithium bromide absorption heat pump 1 through steam volatilization, so that the effect of cooling is also realized.
Step five: after the temperature is reduced, cooling water is discharged from the cooling tower 4 and flows into the condenser 2, so that the recycling effect is realized.
Step six: because the external driving steam can enter the lithium bromide absorption heat pump 1 and then joins with the heat entering the lithium bromide absorption heat pump in the fourth step, the generator and the evaporator inside the lithium bromide absorption heat pump 1 work.
Step seven: the generator and the evaporator inside the lithium bromide absorption heat pump 1 absorb the heat of the driving steam and the cooling water, and then the heat is exchanged with the condensed water through the condenser and the absorber, so that the condensed water passing through the lithium bromide absorption heat pump 1 is heated to 80 ℃ and then discharged.
Step eight: the adjusting valve 3 is opened, the amount of water entering the lithium bromide absorption heat pump 1 is controlled by the adjusting valve 3 through the cooling water inside the condenser 2, the cooling water passes through the evaporator inside the lithium bromide absorption heat pump 1, the cooling water with high temperature and the water vapor inside the lithium bromide absorption heat pump carry out heat exchange through the evaporator, the gasification absorbs heat, the effect of refrigeration and cooling is achieved, and thus the cooling water after cooling transfers heat to hot water.
Step nine: the cooling water is mixed with the cooling water at the outlet of the condenser 2 and then enters the cooling tower 4 to be continuously cooled, and circulation is further realized.
Example 1:
a device capable of improving energy utilization rate of a thermal power plant in a non-heating period comprises a lithium bromide absorption heat pump 1, a condenser 2, two regulating valves 3 and a cooling tower 4, wherein the lithium bromide absorption heat pump 1 is arranged behind one end of the condenser 2, two ends of the cooling tower 4 are connected with the condenser 2, a hot water outlet at one end of the lithium bromide absorption heat pump 1 is connected with a deaerator, an evaporator inside the lithium bromide absorption heat pump 1 is connected with a cooling water outlet at one end of the condenser 2, the regulating valves 3 are arranged in two, the regulating valves 3 are arranged between the lithium bromide absorption heat pump 1 and the condenser 2, a steam turbine exhausts gas into the condenser 2, the gas exhausted from the steam turbine is condensed into water through the condenser 2 after entering the condenser 2, the gas is changed into condensed water, and dead steam emits latent heat to vaporize and is circulated cooling water in the condensing process, one part of cooling water enters an evaporator of the lithium bromide absorption heat pump 1 for cooling, the other part of cooling water is mixed with the cooling water at the outlet of the evaporator of the lithium bromide absorption heat pump 1 and then enters a cooling tower 4, the cooling water flows and contacts with air to generate steam through heat exchange, the steam volatilizes and carries away heat to achieve the purpose of cooling, the cooling water is cooled and then enters an absorption condenser 2, the condensate water in the condenser 2 flows into the lithium bromide absorption heat pump 1, at the moment, the temperature of the condensate water is about 40 ℃, as the driving steam also enters the lithium bromide absorption heat pump 1, the driving steam is used as a driving heat source of the lithium bromide absorption heat pump 1, a generator and a condenser in the lithium bromide absorption heat pump 1 enter a working state, the driving steam is converted into liquid through the generator, and the heat in the generator pipe is transferred to a concentrated solution near the pipe, the heat release is realized, the temperature of the condensed water is raised to about 80 ℃ in the lithium bromide absorption heat pump 1 by matching with the absorber, when the adjusting valve 3 at one end is opened, the amount of water of the cooling water entering the lithium bromide absorption heat pump 1 can be adjusted according to the adjusting valve 3, the cooling water enters the lithium bromide absorption heat pump 1 and then exchanges heat with the inside water vapor through the evaporator in the lithium bromide absorption heat pump 1, the gasification heat absorption is realized, the cooling water is cooled, the adjusting valve 3 at the other end is opened again, the cooled cooling water is mixed with the cooling water at the outlet of the condenser 2, the mixed cooling water enters the cooling tower 4 to be continuously cooled, the effect of recycling is realized, the heat of the condensed water carrier at about 80 ℃ in the lithium bromide absorption heat pump 1 is discharged, and the low-temperature waste heat energy in the aspect of a power plant is conveniently utilized.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The utility model provides a can improve device of steam power plant energy utilization rate in non-heating period, includes lithium bromide absorption heat pump (1), condenser (2), governing valve (3) and cooling tower (4), its characterized in that: the lithium bromide absorption heat pump (1) is arranged behind one end of the condenser (2), and two ends of the cooling tower (4) are connected with the condenser (2).
2. The apparatus of claim 1, wherein the apparatus is further configured to increase the energy efficiency of the thermal power plant during non-heating periods: the hot water outlet at one end of the lithium bromide absorption heat pump (1) is connected with a deaerator, and the evaporator inside the lithium bromide absorption heat pump (1) is connected with the cooling water outlet at one end of the condenser (2).
3. The apparatus of claim 1, wherein the apparatus is further configured to increase the energy efficiency of the thermal power plant during non-heating periods: the adjusting valves (3) are arranged in two, and the adjusting valves (3) are arranged between the lithium bromide absorption heat pump (1) and the condenser (2).
4. A method for improving the energy utilization rate of a thermal power plant in a non-heating period is characterized by comprising the following steps: comprises the following steps;
the method comprises the following steps: the turbine exhausts, and the exhausted gas enters the condenser (2).
Step two: after the gas enters the condenser (2), when the gas contacts the surface of a heat exchange tube in the condenser (2), the gas is cooled by water flow in the heat exchange tube to become water, and the heat is absorbed by the heat exchange tube.
Step three: the temperature of the condensation water after heat release is 38 ℃, and the condensation water enters the lithium bromide absorption heat pump (1).
Step four: and (2) allowing part of the cooling water in the step (II) to flow into the cooling tower (4), performing cold-heat exchange to generate steam after the cooling tower (4) is in flowing contact with air by using water, volatilizing the steam to take away heat, and achieving the effect of cooling, allowing part of the cooling water in the step (II) to enter the lithium bromide absorption heat pump (1), volatilizing the steam in an evaporator of the lithium bromide absorption heat pump (1) to take away the heat, and achieving the effect of cooling.
Step five: after the temperature is reduced, cooling water is discharged from the cooling tower (4) and flows into the condenser (2), so that the effect of recycling is realized.
Step six: because the external driving steam can enter the lithium bromide absorption heat pump (1) and then is converged with the heat entering the lithium bromide absorption heat pump (1) in the fourth step, the generator and the evaporator inside the lithium bromide absorption heat pump (1) work.
Step seven: the generator and the evaporator in the lithium bromide absorption heat pump (1) absorb the heat of the driving steam and the cooling water, and then the heat is exchanged with the condensed water through the condenser and the absorber, so that the condensed water passing through the lithium bromide absorption heat pump (1) is heated to 80 ℃ and then discharged.
Step eight: the adjusting valve (3) is opened, the amount of water entering the lithium bromide absorption heat pump (1) is controlled by the adjusting valve (3) through the cooling water in the condenser (2), the cooling water passes through the evaporator in the lithium bromide absorption heat pump (1), the high-temperature cooling water and the steam in the high-temperature cooling water are subjected to heat exchange through the evaporator, the cooling water is gasified, heat absorption is achieved, the effect of refrigeration and cooling is achieved, and the cooling water after cooling transfers heat to hot water.
Step nine: the cooling water is mixed with the cooling water at the outlet of the condenser (2) and then enters the cooling tower (4) to be continuously cooled, and circulation is further realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010497763.7A CN111578258A (en) | 2020-06-04 | 2020-06-04 | Device capable of improving energy utilization rate of thermal power plant in non-heating period and use method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010497763.7A CN111578258A (en) | 2020-06-04 | 2020-06-04 | Device capable of improving energy utilization rate of thermal power plant in non-heating period and use method |
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| CN111578258A true CN111578258A (en) | 2020-08-25 |
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| CN202010497763.7A Pending CN111578258A (en) | 2020-06-04 | 2020-06-04 | Device capable of improving energy utilization rate of thermal power plant in non-heating period and use method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2615346Y (en) * | 2002-11-28 | 2004-05-12 | 江苏双良空调设备股份有限公司 | Heating, electric and cooling triple combined supply system with steam type bromine cooling machine and thermal pump as cold and heat sources |
| CN102828790A (en) * | 2011-06-14 | 2012-12-19 | 同方节能工程技术有限公司 | Low-pressure heating system for power plant |
| CN208011678U (en) * | 2018-03-12 | 2018-10-26 | 光大环保技术研究院（南京）有限公司 | The afterheat utilizing system of waste incineration |
-
2020
- 2020-06-04 CN CN202010497763.7A patent/CN111578258A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2615346Y (en) * | 2002-11-28 | 2004-05-12 | 江苏双良空调设备股份有限公司 | Heating, electric and cooling triple combined supply system with steam type bromine cooling machine and thermal pump as cold and heat sources |
| CN102828790A (en) * | 2011-06-14 | 2012-12-19 | 同方节能工程技术有限公司 | Low-pressure heating system for power plant |
| CN208011678U (en) * | 2018-03-12 | 2018-10-26 | 光大环保技术研究院（南京）有限公司 | The afterheat utilizing system of waste incineration |
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Application publication date: 20200825 |
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| RJ01 | Rejection of invention patent application after publication |