CN209991522U - Integrated system for recycling cooling water waste heat without improving backpressure of million-level generator - Google Patents
Integrated system for recycling cooling water waste heat without improving backpressure of million-level generator Download PDFInfo
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- CN209991522U CN209991522U CN201920578918.2U CN201920578918U CN209991522U CN 209991522 U CN209991522 U CN 209991522U CN 201920578918 U CN201920578918 U CN 201920578918U CN 209991522 U CN209991522 U CN 209991522U
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Abstract
The utility model discloses a do not improve million grades of water-cooled generator set backpressure operating mode and retrieve electricity + steam hybrid system integrated equipment that low cooling water carries out central heating's electricity + steam hybrid system integrated equipment, equipment comprises voltage compression formula low temperature waste heat recovery device, steam type absorption heat pump device and various connecting line and annex. The method is characterized in that: the exhaust back pressure of million-level water cooling units of the power plant in winter does not need to be improved, the waste heat of low-temperature cooling circulating water of the thermal power plant is recovered by the conventional heating steam drive of the electricity and the steam turbine, and the heat supply capacity of the power plant is increased by more than 20% on the basis of not influencing the power generation efficiency of the million-level water cooling units of the power plant.
Description
Technical Field
The utility model relates to a do not improve million grades of water-cooled generator group backpressure operating mode and retrieve electricity + steam hybrid integrated system that low cooling water's steam + electricity hybrid system integrated equipment carries out central heating belongs to energy technical field.
Background
In most heat supply power plants in northern China, waste steam and waste heat of a condenser are discharged into the atmosphere through a cooling tower, the city is rapidly developed correspondingly, the concentrated heat supply load is continuously increased, the heat supply capacity of the power plant is not matched with the increased demand of the heat supply load, the heat supply problem in the near term is solved by a newly-built heat supply power plant, the heat load hardly reaches the output capacity of the power plant in a short time, and therefore the inner part of the power plant is excavated and submerged to form an effective way for solving the problem of load increase in the short term. In 12 months 2009, the "cogeneration centralized heating technology based on absorption heat exchange" has been listed in the national key energy-saving technology promotion catalog (second edition) issued by the committee for development and reform, and is supported by the national policy in the aspect of reasonably utilizing the waste heat of the cooling circulating water of the power plant.
The water temperature and the steam pressure of heat source water are determined to the greatest extent according to the efficiency of the absorption heat pump, according to the existing absorption heat pump technology, in order to achieve ideal efficiency, the water outlet temperature of the heat source water needs to be guaranteed to be more than 30 ℃, according to the statistics of the running condition of a water cooling unit in winter in the northern area at present, the average water outlet temperature of a condenser is only 20 ℃, and if a conventional absorption heat pump unit is adopted, the running back pressure of a steam turbine needs to be raised, and the water outlet temperature of the condenser is increased. Aiming at a million-level water cooling unit, if the waste heat of circulating water cannot be completely recovered, the operation backpressure is improved, the power generation efficiency is seriously influenced, and meanwhile, the energy consumption of a power plant and the evaporation water quantity of a cooling tower are increased.
Disclosure of Invention
The above-mentioned weak point to existence among the prior art, the utility model aims at providing a do not improve the steam + electricity hybrid type system integration equipment that million grades of water-cooled generator group backpressure operating mode retrieved low cooling water and carry out central heating's electricity + steam hybrid type system integration equipment.
The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is:
an integrated system for recovering cooling water waste heat without increasing the backpressure of a million-class generator, comprising: the system comprises a voltage compression type low-temperature waste heat recovery device, a steam type absorption heat pump device, a primary side heat supply network circulating water pipeline, a secondary side power plant cooling circulating water pipeline and a driving steam extraction device;
the driving steam extraction pipeline comprises an extraction steam turbine, the extraction steam turbine is divided into two paths through a pipeline and is respectively connected with the driving voltage compression type low-temperature waste heat recovery device and the steam type absorption heat pump device, and meanwhile, the steam releases heat and is cooled into condensate water which is respectively returned to a water supply tank of the power plant through the pipeline;
the primary side heat supply network circulating water pipeline comprises a primary side pipeline heat supply network circulating water return device, a primary side pipeline heat supply network circulating water supply device and a heat supply user, water of the primary side pipeline heat supply network circulating water return device reaches the primary side pipeline heat supply network circulating water supply device after being heated by a steam type absorption heat pump device through a pipeline and then is supplied to the heat supply user for use, and water flowing out after the heat supply user uses returns to the primary side pipeline heat supply network circulating water return device for recycling;
the secondary side power plant cooling circulating water pipeline comprises a secondary side pipeline cooling circulating water supply device, a secondary side pipeline cooling circulating water outlet device and a steam turbine condenser; cooling water of the steam turbine condenser enters the secondary side pipeline cooling circulating water supply device through a pipeline, passes through the voltage-condensation type low-temperature waste heat recovery device through a pipeline, and then returns to the steam turbine condenser for recycling through the secondary side pipeline cooling circulating water outlet device;
the water outlet of the voltage-compression type low-temperature waste heat recovery device is connected with the water inlet of the steam-type absorption heat pump device through a pipeline, the water outlet of the steam-type absorption heat pump device is connected with the water inlet of the voltage-compression type low-temperature waste heat recovery device, and a circulating pump is arranged between the voltage-compression type low-temperature waste heat recovery device and the connecting pipeline of the steam-type absorption heat pump device.
Further, the voltage compression type low-temperature waste heat recovery device is a compression type refrigerating machine.
Furthermore, a pressure gauge and a control valve are also arranged on a connecting pipeline of the voltage compression type low-temperature waste heat recovery device and the steam type absorption heat pump device.
The utility model has the advantages that:
the utility model provides a pair of equipment need not to improve the million grades of water-cooling units of power plant exhaust backpressure in winter to the conventional heating steam drive of electricity + steam turbine retrieves the low-temperature cooling circulating water waste heat of steam power plant, on the basis that does not influence million units of power plant generating efficiency, multiplicable power plant's heating capacity more than 20%.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings. Wherein like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
The following embodiments are merely illustrative of the present invention and are not intended to limit the scope of the present invention. Use the utility model discloses a think about right the utility model discloses the simple change that goes on is all in the utility model discloses the within range that claims.
Referring to fig. 1, an integrated system for recovering cooling water waste heat without increasing the backpressure of a million-class generator includes: the system comprises a voltage compression type low-temperature waste heat recovery device 1, a steam type absorption heat pump device 2, a primary side heat supply network circulating water pipeline, a secondary side power plant cooling circulating water pipeline and a driving steam extraction device;
the driving steam extraction pipeline comprises an extraction steam turbine 11, the extraction steam turbine 11 is divided into two paths through a pipeline and is respectively connected with the driving voltage compression type low-temperature waste heat recovery device 1 and the steam type absorption heat pump device 2, and meanwhile, the steam is cooled into condensate water after releasing heat and respectively returns to a water supply tank 8 of the power plant through the pipeline;
the primary side heat supply network circulating water pipeline comprises a primary side pipeline heat supply network circulating water return device 3, a primary side pipeline heat supply network circulating water supply device 4 and a heat supply user 10, water of the primary side pipeline heat supply network circulating water return device 3 is heated through a steam type absorption heat pump device 2 through a pipeline and then reaches the primary side pipeline heat supply network circulating water supply device 4, then the water is supplied to the heat supply user 10 for use, and water flowing out after the heat supply user 10 uses the water returns to the primary side pipeline heat supply network circulating water return device 3 for recycling;
the secondary side power plant cooling circulating water pipeline comprises a secondary side pipeline cooling circulating water supply device 7, a secondary side pipeline cooling circulating water outlet device 5 and a steam turbine condenser 6; cooling water of the steam turbine condenser 6 enters the secondary side pipeline cooling circulating water supply device 7 through a pipeline, and the cooling water of the secondary side pipeline cooling circulating water supply device 7 passes through the voltage-compression type low-temperature waste heat recovery device 1 through a pipeline and then returns to the steam turbine condenser 6 through the secondary side pipeline cooling circulating water outlet device 5 for recycling;
the water outlet of the voltage-compression type low-temperature waste heat recovery device 1 is connected with the water inlet of the steam-type absorption heat pump device 2 through a pipeline, the water outlet of the steam-type absorption heat pump device 2 is connected with the water inlet of the voltage-compression type low-temperature waste heat recovery device 1, and a circulating pump 9 is arranged between the connecting pipelines of the voltage-compression type low-temperature waste heat recovery device 1 and the steam-type absorption heat pump device 2.
In the preferred embodiment, the voltage compression type low-temperature waste heat recovery device 1 is a compression type refrigerator.
In this preferred embodiment, a pressure gauge and a control valve are further disposed on a connection pipeline between the voltage-compression-type low-temperature waste heat recovery device 1 and the steam-type absorption heat pump device 2.
The working principle is as follows:
a steam + electricity hybrid power type system integration equipment for recovering low-temperature cooling water without improving the backpressure working condition of a million-level water-cooled generator set carries out centralized heat supply, and the equipment consists of a voltage compression type low-temperature waste heat recovery device, a steam type absorption heat pump device, various connecting pipelines and accessories; the water path system of the connecting pipeline is divided into a primary side heat supply network circulating water pipeline, a secondary side power plant cooling circulating water pipeline and a driving steam extraction pipeline, circulating water of the primary side pipeline heat supply network is supplied to heat supply users after passing through a steam type absorption heat pump device to absorb voltage-compression type low-temperature waste heat recovery device and drive steam heat to rise in temperature, cooling circulating water of the secondary side pipeline is led out from a condenser outlet pipeline, returns to a steam condenser after passing through the voltage-compression type low-temperature waste heat recovery device to release heat, and drives the steam extraction pipeline to drive the absorption heat pump system to release heat and cool the heat into condensate water to return to the power plant water supply system.
A new waste heat recovery process for recovering low-grade heat sources in a grading manner is constructed by adopting two systems of voltage compression type low-temperature waste heat recovery and a steam type absorption heat pump, and the problems that the temperature of the waste heat of a million water cooling units is low and the waste heat cannot be recovered are solved. The compression type low-temperature waste heat recovery system is driven by voltage compression to recover the heat of the low-grade heat source of the water cooling unit to generate a low-grade heat source capable of meeting the requirement of efficient operation of the absorption heat pump system, and meanwhile, the absorption heat pump is driven by heat supply steam to absorb the heat generated by the driving steam and the low-temperature waste heat recovery system, so that the circulating water temperature of a heat supply network is increased, and the system circulation is completed.
The utility model has the advantages that:
the utility model provides a pair of equipment need not to improve the million grades of water-cooling units of power plant exhaust backpressure in winter to the conventional heating steam drive of electricity + steam turbine retrieves the low-temperature cooling circulating water waste heat of steam power plant, on the basis that does not influence million units of power plant generating efficiency, multiplicable power plant's heating capacity more than 20%.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (3)
1. An integrated system for recovering cooling water waste heat without increasing the backpressure of a million-level generator is characterized by comprising: the method comprises the following steps: the system comprises a voltage compression type low-temperature waste heat recovery device (1), a steam type absorption heat pump device (2), a primary side heat supply network circulating water pipeline, a secondary side power plant cooling circulating water pipeline and a driving steam extraction device;
the driving steam extraction pipeline comprises an extraction steam turbine (11), the extraction steam turbine (11) is divided into two paths through a pipeline and is respectively connected with the driving voltage compression type low-temperature waste heat recovery device (1) and the steam type absorption heat pump device (2), and meanwhile, the steam releases heat and is cooled into condensate water which returns to a water supply tank (8) of the power plant through the pipeline;
the primary side heat supply network circulating water pipeline comprises a primary side pipeline heat supply network circulating water return device (3), a primary side pipeline heat supply network circulating water supply device (4) and heat supply users (10), water of the primary side pipeline heat supply network circulating water return device (3) reaches the primary side pipeline heat supply network circulating water supply device (4) after being heated by a steam type absorption heat pump device (2) through a pipeline, and then is supplied to the heat supply users (10) for use, and water flowing out after the heat supply users (10) use returns to the primary side pipeline heat supply network circulating water return device (3) for recycling;
the secondary side power plant cooling circulating water pipeline comprises a secondary side pipeline cooling circulating water supply device (7), a secondary side pipeline cooling circulating water outlet device (5) and a steam turbine condenser (6); cooling water of the steam turbine condenser (6) enters the secondary side pipeline cooling circulating water supply device (7) through a pipeline, and the cooling water of the secondary side pipeline cooling circulating water supply device (7) passes through the voltage-compression type low-temperature waste heat recovery device (1) through a pipeline and then returns to the steam turbine condenser (6) through the secondary side pipeline cooling circulating water outlet device (5) for recycling;
the water outlet of the voltage-compression type low-temperature waste heat recovery device (1) is connected with the water inlet of the steam-type absorption heat pump device (2) through a pipeline, the water outlet of the steam-type absorption heat pump device (2) is connected with the water inlet of the voltage-compression type low-temperature waste heat recovery device (1), and a circulating pump (9) is arranged between the connecting pipelines of the voltage-compression type low-temperature waste heat recovery device (1) and the steam-type absorption heat pump device (2).
2. The integrated system for recovering the waste heat of the cooling water without increasing the backpressure of the million-class generator according to claim 1, wherein the voltage compression type low-temperature waste heat recovery device (1) is a compression type refrigerator.
3. The integrated system for recovering the waste heat of the cooling water without increasing the backpressure of the million-class generator according to claim 1, wherein a pressure gauge and a control valve are further arranged on a connecting pipeline of the voltage compression type low-temperature waste heat recovery device (1) and the steam type absorption heat pump device (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920578918.2U CN209991522U (en) | 2019-04-26 | 2019-04-26 | Integrated system for recycling cooling water waste heat without improving backpressure of million-level generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920578918.2U CN209991522U (en) | 2019-04-26 | 2019-04-26 | Integrated system for recycling cooling water waste heat without improving backpressure of million-level generator |
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| CN209991522U true CN209991522U (en) | 2020-01-24 |
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| CN201920578918.2U Active CN209991522U (en) | 2019-04-26 | 2019-04-26 | Integrated system for recycling cooling water waste heat without improving backpressure of million-level generator |
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| CN (1) | CN209991522U (en) |
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