CN113446076A - Industrial heat supply parameter matching method based on grading matching - Google Patents
Industrial heat supply parameter matching method based on grading matching Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D1/00—Steam central heating systems
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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Abstract
The invention provides a graded matching industrial heat supply parameter matching method, aiming at meeting the parameter requirements of heat users, and realizing graded utilization of energy by adopting a heat supply parameter graded matching technology. The technical principle of the graded matching is that when a heat source is selected, the temperature and the pressure of steam are considered separately, and the graded matching is adopted to replace the technical idea that the parameters of the steam of the heat source need to meet the requirements of the temperature and the pressure at the same time, so that the energy loss caused by the mismatching of the source charge level in the heat supply process is reduced, and the energy utilization efficiency is improved. The invention designs a pressure matching method, which reduces the source load matching pressure loss in the heat supply process; a temperature matching method is designed, and the energy level mismatch loss in the temperature matching process is reduced. The invention utilizes the heat supply parameter grading matching technology, improves the matching degree of the heat supply source load parameters, reduces the temperature and pressure reduction loss in the heat supply process, improves the energy utilization efficiency and achieves the purposes of energy conservation and emission reduction.
Description
Technical Field
The invention relates to a graded matching industrial heating parameter matching method, in particular to energy graded utilization in the industrial heating category, and belongs to the field of engineering thermodynamics.
Background
The cogeneration is a typical energy cascade utilization technology, high-quality steam of a power plant is used for producing high-quality electric energy, meanwhile, appropriate steam is extracted according to user requirements to supply for industry or civilian use, and cascade utilization is realized.
According to different heat user properties, heat supply is divided into two types, namely civil heat supply and industrial heat supply. The civil heat supply is generally used for heating, generally only requires heat supply temperature and total heat, has low requirement on heat supply pressure, and the pressure of a heat supply working medium is mainly used for overcoming the flow resistance of a heat supply system. The industrial heating and the industrial production process are related, and besides the heat, the pressure influence of a heating working medium needs to be considered, so that the heat source point matching of the industrial heating needs to consider the matching of both the temperature and the pressure. At present, industrial heat supply demands are different according to process requirements, and high-parameter, medium-parameter and low-parameter heat supply and high-parameter heat supply exist: the steam is extracted from the outlet of a superheater of a power plant at the temperature of above 400 ℃ under the grade of 4.0 MPa; heating parameters: extracting steam from a power plant at the first stage of extraction, cooling or heating under the pressure of 1.0-2.5 MPa and at the temperature of 300-400 ℃; low-parameter heat supply: 0.3-0.6 MPa, below 350 ℃, and generally extracting steam from a low-pressure communicating pipe in a power plant. In the current industrial heat supply technology, the requirements of temperature and pressure are generally considered comprehensively, when a heat source point is selected, the requirements of pressure and temperature are simultaneously met, steam is generally extracted by a steam extraction point with higher pressure and temperature grade, and then the steam is subjected to temperature reduction and pressure reduction and then is used by a heat supply user, so that the energy waste of high energy and low use is caused, and the efficiency of cogeneration is reduced.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a graded matching industrial heating parameter matching method for improving the utilization efficiency of cogeneration energy.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: a graded matching industrial heating parameter matching method is characterized in that a point matched with a user demand pressure parameter in a power plant heating system is used as a steam extraction point for extracting steam, and the heating steam extracted from the steam extraction point is heated or cooled to match a user demand temperature parameter and then supply heat to a user.
The technical scheme is further designed as follows: the air exhaust point is a heat source point which is closest to the user demand pressure parameter and has higher pressure than the user demand pressure parameter.
One preferable scheme of the above technical scheme is as follows: and a steam reheating system or a flue gas reheating system is adopted to heat the heat supply extraction steam extracted from the extraction point.
The steam reheating system comprises a steam-steam heat exchanger and a heating steam extraction system; the heating extraction steam enters the cold side of the steam-steam heat exchanger, the heating extraction steam system extracts heating extraction steam with the temperature higher than the heating extraction steam temperature from the power plant heating system, the heating extraction steam enters the hot side of the steam-steam heat exchanger, heat exchange is completed in the steam-steam heat exchanger, and the heating extraction steam temperature is increased.
The steam reheating system further comprises a pressure reducer, and the heat supply extracted steam enters the pressure reducer to be decompressed and then enters the cold side of the steam-steam heat exchanger.
The flue gas reheating system comprises a heat supply flue gas heater, the heat supply flue gas heater is arranged in a boiler of a power plant heat supply system, heat supply extraction steam enters the heat supply flue gas heater to exchange heat with flue gas in the boiler, and the heat supply extraction steam temperature is improved.
The flue gas reheating system further comprises a pressure reducer, and the heat supply extracted steam enters the pressure reducer to be decompressed and then enters the heat supply flue gas heater.
Another preferred scheme of the above technical scheme is as follows: and a water spraying temperature reduction system and a heat exchange temperature reduction system are adopted to reduce the temperature of the heat supply extraction steam extracted from the extraction point.
The heat exchange cooling system comprises a dividing wall type heat exchanger, the heat supply extraction steam enters the hot side of the dividing wall type heat exchanger, the working medium in the heat supply system of the power plant is extracted to enter the cold side of the dividing wall type heat exchanger, heat exchange is completed in the dividing wall type heat exchanger, and the heat supply extraction steam temperature is reduced.
The industrial heat supply users comprise high-parameter users and medium-parameter users, points matched with demand pressure parameters of the high-parameter users and the medium-parameter users are selected from a power plant heat supply system respectively and serve as high-parameter steam extraction points and medium-parameter steam extraction points, heat exchange is carried out on heat supply steam extracted from the high-parameter steam extraction points and the medium-parameter steam extraction points respectively in steam-steam heat exchangers, and the temperatures of the two heat supply steam extractions are respectively increased and reduced.
The invention has the beneficial effects that:
the invention designs a heat supply parameter matching method for graded matching, which changes the technical principle of heat supply heat source parameter matching from 'simultaneously meeting the temperature and pressure requirements' to 'meeting the temperature and pressure requirements in grades', reduces the energy loss caused by source charge level mismatching in the heat supply process, and improves the energy utilization efficiency.
The invention designs a pressure matching method, and reduces the source load matching pressure loss in the heat supply process. The invention designs a temperature matching method, reduces the energy level mismatch loss in the temperature matching process and improves the system efficiency; the invention matches from two dimensions of pressure and temperature, so that the matching is more accurate and the energy utilization is more reasonable.
Drawings
FIG. 1 is a flow chart of a hierarchical matching method of the present invention;
FIG. 2 is a schematic structural diagram of a hierarchical matching scheme in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a second hierarchical matching scheme in an embodiment of the present invention;
FIG. 4 is a flow chart of a one-time matching method;
fig. 5 is a schematic diagram of a one-time matching scheme.
In the figure: 1 is a power plant boiler; 2 is main steam; 3 is a high-pressure cylinder of the steam turbine; 4 is cold reheat steam; 5 is hot re-steam; 6 is a turbine intermediate pressure cylinder; 7 is heat re-heating steam extraction, 8 is high-parameter heating steam extraction, 9 is a pressure reducer, 10 is medium-parameter heating steam, 11 is a medium-parameter heating header, 12 is a high-parameter heating header, 13 is high-parameter heating steam, 14 is a steam-steam heat exchanger, 15 is a temperature and pressure reducer, 16 is a heating flue gas heater, 17 is a high-parameter temperature and pressure reducer, and 18 is a medium-parameter temperature and pressure reducer.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Example one
In this embodiment, the subcritical 300MW unit is taken as an example, and the main working condition parameters are shown in table 1, and the thermal user demand parameters are shown in table 2.
TABLE 1 subcritical 300MW unit principal parameters
TABLE 2 Heat consumer demand parameters (heating header)
As shown in fig. 1, in the method for matching industrial heating parameters by hierarchical matching according to the embodiment, parameter requirements of users are first obtained, pressure is used as a first-stage matching parameter, and a pressure-matched steam extraction point is searched from a power plant heating system; and then, on the basis of the steam parameters of the steam extraction point, performing second-stage parameter matching, namely heat supply steam temperature matching, and matching the steam parameters with the requirements of users by heating or cooling. Compared with one-time matching, the grading matching can more accurately realize the matching degree of the heat source and the heat load, and the system energy efficiency is improved.
The pressure matching technical principle in the embodiment is as follows: and according to the user requirement, selecting the heat source point which is closest to the user pressure parameter and has the pressure higher than the user parameter. According to the principle, the steam extraction position can be selected by integrating the characteristics of the system, the equipment and the user requirements and selecting modes of additionally arranging a steam extraction point, matching a pressure matcher with steam extraction and the like. The first-stage matching pressure is because in a power cycle, pressure regulation can only be generally carried out from high to low, the pressure is difficult to lift, technologies such as a steam compressor are not mature at present, energy consumption is high, a pressure reduction technology is mainly adopted for pressure matching, when a heat source is matched, a steam supply heat source point with pressure close to user parameters is selected, energy loss caused by pressure reduction is reduced, and the pressure of a selected steam extraction point is higher than the pressure required by a user, so that fine adjustment of the pressure is required after steam extraction.
The method for heating the extracted heat supply steam in the embodiment comprises a steam reheating technology and a flue gas reheating technology. The steam reheating technology is to heat supply steam by using high-temperature steam and increase the steam temperature; the flue gas reheating technology is to heat supply steam by utilizing the temperature of flue gas at the side of a boiler so as to match the requirements of heat supply users. The method for reducing the temperature of heat supply extraction steam is divided into a water spraying temperature reduction technology and a heat exchange temperature reduction technology, wherein the water spraying temperature reduction technology is to spray low-temperature cold water into steam to reduce the temperature of the steam; the heat exchange cooling technology is a dividing wall type heat exchange technology, redundant heat in steam is exchanged to a working medium of a system, and meanwhile, the temperature of heat supply steam is reduced to be matched with the heat supply requirement. The heat exchange technology can improve the energy utilization efficiency of the system and is superior to the water spraying temperature reduction technology.
As shown in fig. 2, the hierarchical matching technical solution in this embodiment includes a high-parameter heating system, a medium-parameter heating system, and a temperature matching system.
In the system of the embodiment, the main steam 2 of the power plant boiler 1 enters the turbine high-pressure cylinder 3, and the cold reheat steam 4 returns to the power plant boiler 1 from the turbine high-pressure cylinder 3 and then enters the turbine intermediate-pressure cylinder 6 through the hot reheat steam 5.
The high-parameter heat supply system is used for selecting a steam extraction point on a high-pressure cylinder 3 of the steam turbine to extract high-parameter heat supply extraction steam 8 according to high parameter requirements, the high-parameter heat supply extraction steam 8 is decompressed by a decompressor 9 and enters a cold side of a steam-steam heat exchanger 14, the high-parameter heat supply extraction steam enters a high-parameter heat supply header 12 after being heated by the steam-steam heat exchanger 14, and finally high-parameter heat supply steam 13 is formed to supply heat for high-parameter users.
The medium parameter heat supply selects the hot re-steam 5 as the steam extraction point to extract heat and re-supply the heat extraction steam 7 according to the requirements of the medium parameter users, the hot re-supply extraction steam 7 enters the hot side of the steam-steam heat exchanger 14, enters the temperature reduction decompressor 15 for fine adjustment of pressure and temperature after the temperature of the steam-steam heat exchanger 14 is reduced, then enters the medium parameter heat supply header 11, and finally becomes the medium parameter heat supply steam 10 for supplying heat to the medium parameter users.
The temperature matching system is a steam-steam heat exchanger 14 used for heat exchange of the high-parameter heat supply extraction steam 8 and the hot resupply extraction steam 7.
In the embodiment, the pressure of the high-parameter heat supply extraction steam 8 is 4.9MPa, the temperature is 359.9 ℃, the pressure is reduced through a pressure reducer 9, the pressure of the high-parameter heat supply header 12 is 4.1MPa, the temperature is 352.67 ℃, and the pressure is reduced by 0.8 MPa; the pressure of the hot resupply extraction steam 7 is 3.52MPa, the temperature is 538 ℃, the hot resupply extraction steam exchanges heat with the high-parameter heat supply extraction steam 8 through a steam-steam heat exchanger 14, the high-parameter heat supply steam is lifted to 410 ℃, the hot resupply extraction steam is reduced to 362 ℃, the hot resupply extraction steam enters the medium-parameter heat supply header 11, and the temperature is finely adjusted to 2.5MPa of user pressure, 350 ℃, 1.02MPa of pressure reduction and 12 ℃ of temperature reduction and adjustment through a temperature reduction and pressure reducer 15. According to the technical scheme, the temperature regulation adopts heat exchange among heating steam to replace most of water spraying cooling modes, and through the technical measures, the high-parameter and medium-parameter heating large pressure drop and large temperature drop regulation modes are greatly reduced, the temperature reduction and pressure reduction loss of the system is reduced, and the system economy is improved.
Example two
The second hierarchical matching scheme in this embodiment is shown in fig. 3, and includes a high-parameter heating system and a flue gas temperature matching system.
The high-parameter heat supply system selects a steam extraction point on a high-parameter steam turbine pressure cylinder 3 to extract high-parameter heat supply extraction steam 8 according to the requirements of high-parameter users, the high-parameter heat supply extraction steam 8 is decompressed by a decompressor 9 and then enters a heat supply flue gas heater 16, the heat supply flue gas heater 16 is arranged in a power plant boiler 1, the high-parameter heat supply extraction steam 8 after heat exchange enters a high-parameter heat supply header 12 and finally becomes high-parameter heat supply steam 13 to supply heat for the high-parameter users.
The flue gas temperature system comprises a heating flue gas heater 16 for exchanging heat between the high-parameter heating extraction steam 8 and flue gas in the boiler.
The second scheme in the embodiment mainly aims at the scene with only high-parameter heat supply and no parameter heat supply. The pressure of the high-parameter heat supply extraction steam 8 is 4.9MPa, the temperature is 359.9 ℃, the pressure is adjusted to 4.1MPa through a pressure reducer 9, the temperature is 352.67 ℃, and the pressure is reduced by 0.8 MPa; the high-parameter heat supply extraction steam enters a heat supply flue gas heater 2, the temperature is raised to the temperature of steam required by heat supply, namely 410 ℃, and the steam enters a high-parameter heat supply header 12. According to the scheme, the parameter pressure of the steam extraction heat source is close to the user parameter, the temperature regulation adopts a flue gas heating mode to replace a one-time matched temperature and pressure reduction technology, and through the technical measures, the regulation modes of high-parameter heat supply large pressure drop and large temperature drop are greatly reduced, the temperature and pressure reduction loss of the system is reduced, and the economy of the system is improved.
The heat supply method of 'graded matching and gradient utilization' provided by the two embodiments designs two graded matching technical schemes, adopts a steam reheating technology and a flue gas reheating technology to adjust the temperature of heat supply steam, replaces a temperature and pressure reducing adjusting technology adopted by a one-time matching technical scheme, and reduces the energy loss of a heat supply system. The cascade utilization of energy is realized through the technology, and the energy utilization efficiency is improved.
Comparative example
As shown in fig. 4, in the prior art, a method for matching heat source parameters at one time is to match a heat supply source according to the requirement parameters of a user according to the pressure and temperature requirements, the matching principle is that neither the temperature nor the pressure is lower than the parameters required by the user, and then a pressure reduction technology is adopted to adjust the pressure of the heat supply steam to the pressure required by the user; and the temperature of the heating steam is adjusted to the temperature required by the user by adopting a temperature reduction technology. From the matching idea, when a heat source is selected, the requirements of temperature and pressure are simultaneously met, and the important point is to meet the parameter with higher parameter requirement in the two, when the requirement is met, one of the temperature and the pressure is higher than the requirement of a heat user, and the parameter reduction (temperature reduction and pressure reduction) treatment is needed to be carried out on the parameter, so that the waste phenomenon of energy level mismatching is caused.
According to a one-time matching technical route, if the heat supply requirement of a high-parameter user is met, the steam extraction heat source point of the system can only be main steam; the medium-parameter heat supply steam extraction heat source can be main steam, first steam extraction and hot re-steam. The characteristics of the boiler and the steam turbine of the unit are comprehensively considered, the high-parameter heat supply heat source point of the system selects main steam, the high-parameter heat supply heat source point of the system selects heat, and the heat supply scheme is shown in the attached figure 5.
The disposable matching technical scheme of the comparative example comprises a high-parameter heating system and a medium-parameter heating system.
The high-parameter heat supply system extracts high-parameter heat supply extraction steam 8 from main steam 2, and the high-parameter heat supply extraction steam 8 enters a high-parameter heat supply header 12 after being subjected to temperature and pressure reduction by a high-parameter temperature and pressure reduction device 17 to form high-parameter heat supply steam 13.
The parameter heat supply extracts parameter heat supply extraction steam 7 on the hot re-steam 5, and the parameter heat supply extraction steam 7 enters a parameter heat supply header 11 after being subjected to temperature and pressure reduction through a parameter temperature and pressure reduction device 18 to form parameter heat supply steam 10.
In the embodiment, the steam pressure of a high-parameter heat supply heat source point is 16.67MPa, the temperature is 538 ℃, and the temperature is reduced and reduced until the pressure of a header is 4.0MPa, the temperature is 410 ℃, the pressure is reduced by 12.67MPa, and the temperature is reduced by 128 ℃; the steam pressure of the point of the parameter heat supply heat source is 3.52MPa, the temperature is 538 ℃, and the temperature is reduced and decompressed until the pressure of the header is 2.5MPa, the temperature is 350 ℃, the pressure is reduced by 1.02MPa, and the temperature is reduced by 188 ℃. Because the disposable matching scheme needs to select a steam heat source point with higher parameters in order to match the pressure and the temperature at the same time, when the pressure and the temperature are regulated, the measures of temperature reduction and pressure reduction are adopted, the irreversible loss of the system is larger, and the economical efficiency of the system is poorer.
The technical solutions of the present invention are not limited to the above embodiments, and all technical solutions obtained by using equivalent substitution modes fall within the scope of the present invention.
Claims (10)
1. A graded matching industrial heating parameter matching method is characterized in that: and taking a point matched with the user demand pressure parameter in the power plant heating system as a steam extraction point for extracting steam, and heating or cooling the heat supply extracted from the steam extraction point to match the user demand temperature parameter and then supplying heat to the user.
2. The industrial heating parameter matching method of the grading matching according to claim 1, characterized in that: the air exhaust point is a heat source point which is closest to the user demand pressure parameter and has higher pressure than the user demand pressure parameter.
3. The industrial heating parameter matching method of the grading matching according to claim 1, characterized in that: and a steam reheating system or a flue gas reheating system is adopted to heat the heat supply extraction steam extracted from the extraction point.
4. The industrial heating parameter matching method of the grading matching according to claim 3, characterized by: the steam reheating system comprises a steam-steam heat exchanger and a heating steam extraction system; the heating extraction steam enters the cold side of the steam-steam heat exchanger, the heating extraction steam system extracts heating extraction steam with the temperature higher than the heating extraction steam temperature from the power plant heating system, the heating extraction steam enters the hot side of the steam-steam heat exchanger, heat exchange is completed in the steam-steam heat exchanger, and the heating extraction steam temperature is increased.
5. The industrial heating parameter matching method of the grading matching according to claim 4, characterized by: the steam reheating system further comprises a pressure reducer, and the heat supply extracted steam enters the pressure reducer to be decompressed and then enters the cold side of the steam-steam heat exchanger.
6. The industrial heating parameter matching method of the grading matching according to claim 3, characterized by: the flue gas reheating system comprises a heat supply flue gas heater, the heat supply flue gas heater is arranged in a boiler of a power plant heat supply system, heat supply extraction steam enters the heat supply flue gas heater to exchange heat with flue gas in the boiler, and the heat supply extraction steam temperature is improved.
7. The industrial heating parameter matching method of the grading matching according to claim 6, characterized by: the flue gas reheating system further comprises a pressure reducer, and the heat supply extracted steam enters the pressure reducer to be decompressed and then enters the heat supply flue gas heater.
8. The industrial heating parameter matching method of the grading matching according to claim 1, characterized in that: and a water spraying temperature reduction system and a heat exchange temperature reduction system are adopted to reduce the temperature of the heat supply extraction steam extracted from the extraction point.
9. The industrial heating parameter matching method of the grading matching according to claim 8, characterized by: the heat exchange cooling system comprises a dividing wall type heat exchanger, the heat supply extraction steam enters the hot side of the dividing wall type heat exchanger, the working medium in the heat supply system of the power plant is extracted to enter the cold side of the dividing wall type heat exchanger, heat exchange is completed in the dividing wall type heat exchanger, and the heat supply extraction steam temperature is reduced.
10. The industrial heating parameter matching method of the grading matching according to claim 1, characterized in that: the industrial heat supply users comprise high-parameter users and medium-parameter users, points matched with demand pressure parameters of the high-parameter users and the medium-parameter users are selected from a power plant heat supply system respectively and serve as high-parameter steam extraction points and medium-parameter steam extraction points, heat exchange is carried out on heat supply steam extracted from the high-parameter steam extraction points and the medium-parameter steam extraction points respectively in steam-steam heat exchangers, and the temperatures of the two heat supply steam extractions are respectively increased and reduced.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CH301118A (en) * | 1952-02-22 | 1954-08-31 | Bric S A | Cogeneration system. |
| CH342968A (en) * | 1955-06-16 | 1959-12-15 | Hellmut Dipl Ing Eickemeyer | Steam power plant with reheating and steam extraction to supply heat consumers |
| CN207196592U (en) * | 2017-09-19 | 2018-04-06 | 南京电力设备质量性能检验中心 | A kind of heating system based on bypass flue thermal technology again |
| CN207196593U (en) * | 2017-09-19 | 2018-04-06 | 南京电力设备质量性能检验中心 | It is a kind of based on the high pressure combining heating system for taking out back of the body machine technology |
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2021
- 2021-06-29 CN CN202110728476.7A patent/CN113446076A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH301118A (en) * | 1952-02-22 | 1954-08-31 | Bric S A | Cogeneration system. |
| CH342968A (en) * | 1955-06-16 | 1959-12-15 | Hellmut Dipl Ing Eickemeyer | Steam power plant with reheating and steam extraction to supply heat consumers |
| CN207196592U (en) * | 2017-09-19 | 2018-04-06 | 南京电力设备质量性能检验中心 | A kind of heating system based on bypass flue thermal technology again |
| CN207196593U (en) * | 2017-09-19 | 2018-04-06 | 南京电力设备质量性能检验中心 | It is a kind of based on the high pressure combining heating system for taking out back of the body machine technology |
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