CN212841783U - High-efficient utilization system of gas cogeneration system flue gas waste heat - Google Patents
High-efficient utilization system of gas cogeneration system flue gas waste heat Download PDFInfo
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- CN212841783U CN212841783U CN202020213990.8U CN202020213990U CN212841783U CN 212841783 U CN212841783 U CN 212841783U CN 202020213990 U CN202020213990 U CN 202020213990U CN 212841783 U CN212841783 U CN 212841783U
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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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- 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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model discloses a high-efficient system of utilizing of gas co-generation system flue gas waste heat, including exhaust-heat boiler, energy storage equipment, the return water tank, chemical water moisturizing heat exchanger, one-level gas heating heat exchanger, second grade gas heating heat exchanger and lithium bromide unit, exhaust-heat boiler's delivery port passes through outlet conduit and waste heat hot water pipeline intercommunication, chemical water moisturizing heat exchanger, the water inlet of one-level gas heating heat exchanger and lithium bromide unit all communicates with waste heat hot water pipeline, chemical water moisturizing heat exchanger, the delivery port and the return water pipeline intercommunication of one-level gas heating heat exchanger and lithium bromide unit, return water pipeline is connected with the water inlet of return water tank, the delivery port of return water tank passes through circulating water pipe and exhaust-heat boiler's inlet channel intercommunication, energy storage equipment and waste heat hot. The utility model discloses can satisfy the energy supply demand and the nimble adjustment of gas confession system that allies oneself with.
Description
Technical Field
The utility model relates to a high-efficient utilization system of gas allies oneself with confession system flue gas waste heat belongs to the energy field.
Background
The energy problem is one of the basic problems of healthy development of the economic society in China and is an important index for measuring the comprehensive national strength and civilization development degree of a country. It is not only concerned with the improvement of the living standard of people, but also is the power for the development of national economy. Along with the rapid growth of economy in China, the problem of energy shortage is more practical and novel, and because the energy demand is increased rapidly, the contradiction between energy supply and demand is aroused, and the production and consumption modes of energy are changed continuously. The comprehensive energy utilization efficiency of China is far away from that of developed countries, and one important reason is that much energy is discharged into the atmosphere without being reasonably utilized by waste heat, so that the energy is greatly wasted. The development of green clean energy is the key of energy transformation and upgrading in China, and a gas combined supply system is rapidly developed as an important form of clean energy utilization. The gas combined supply system is arranged close to a user, generates electricity and utilizes waste heat in a gradient manner, outputs various energy products such as electricity, cold and heat to the user nearby, is an energy system capable of realizing large-scale energy conservation and emission reduction, has important strategic significance for building a national clean low-carbon sustainable energy system, and is vital to enhancing the waste heat utilization rate and improving the energy utilization rate of a gas turbine energy system. The comprehensive utilization efficiency of energy in China has a certain gap with that of developed countries, the important mode for further improving the energy utilization rate of a gas turbine energy system is efficient cascade utilization of waste heat, the problem that a large amount of flue gas waste heat is not effectively utilized exists in the existing gas combined supply system, and the strengthening of waste heat utilization is crucial to the improvement of the energy utilization rate of the gas combined supply system. Chinese patents with application numbers 201721334302.8, 201910464629.4 and 201711144634.4 propose several waste heat utilization modes, but have certain defects and limitations in the aspects of application range, flexible adjustment and plant energy supply.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a gas allies oneself with high-efficient utilization system of confession system flue gas waste heat, satisfy the energy supply demand and the nimble adjustment of gas allies oneself with confession system.
The utility model provides a technical scheme that above-mentioned problem adopted is: the utility model provides a high-efficient system that utilizes of gas allies oneself with confession system flue gas waste heat, characterized by, including exhaust-heat boiler, energy storage equipment, return water tank, chemical water moisturizing heat exchanger, one-level gas heating heat exchanger, second grade gas heating heat exchanger and lithium bromide unit, exhaust-heat boiler's delivery port passes through outlet conduit and exhaust-heat hot water pipeline intercommunication, the water inlet of chemical water moisturizing heat exchanger, one-level gas heating heat exchanger and lithium bromide unit all communicates with exhaust-heat hot water pipeline, the delivery port and the return water pipeline intercommunication of chemical water moisturizing heat exchanger, one-level gas heating heat exchanger and lithium bromide unit, the return water pipeline is connected with the water inlet of return water tank, the delivery port of return water tank passes through circulating pipe and exhaust-heat boiler's inlet channel intercommunication, energy storage equipment.
Furthermore, water pumps are arranged on the water inlet pipeline and the circulating water pipe.
Furthermore, the system also comprises other heat users, the energy input ends of the other heat users are communicated with the waste heat hot water pipeline, and the energy output ends of the other heat users are communicated with the water return pipeline.
Furthermore, the primary gas heating heat exchanger is also connected with a secondary gas heating heat exchanger, the secondary gas heating heat exchanger is connected to a gas unit, and the primary gas heating heat exchanger is provided with a gas electric heating device.
Further, the energy storage device is arranged in parallel with the waste heat boiler.
Compared with the prior art, the utility model, have following advantage and effect:
1. the waste heat of the flue gas of the unit is absorbed by the heating surface of the waste heat boiler, the system is flexibly adjusted, and the operation of the unit is not influenced in non-energy supply seasons;
2. the waste heat energy supply system and the waste heat energy utilization system are connected through the intermediate heat exchanger or the lithium bromide waste heat utilization equipment, the influence of the waste heat energy utilization system on the main system is small, and the water quality in the waste heat energy supply system cannot be polluted;
3. the system is provided with energy storage equipment, so that the load of the unit can be flexibly adjusted, and energy supply can be provided during the shutdown or overhaul period of the unit.
Drawings
Fig. 1 is a schematic structural diagram (without other thermal users) of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram (with other hot users) of an embodiment of the present invention.
In the figure: the system comprises a waste heat boiler 1, an energy storage device 2, a water return tank 3, a water pump 4, a chemical water supplementing heat exchanger 5, a primary gas heating heat exchanger 6, a secondary gas heating heat exchanger 7, a lithium bromide unit 8, a heating surface 9, a water inlet pipeline 10, a water outlet pipeline 11, a waste heat hot water pipeline 12, a water return pipeline 13, a circulating water pipe 14 and other heat users 15.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Referring to fig. 1, in this embodiment, a system for efficiently utilizing flue gas waste heat of a gas combined supply system includes a waste heat boiler 1, an energy storage device 2, a water return tank 3, a chemical water supplementing heat exchanger 5, a primary gas heating heat exchanger 6, a secondary gas heating heat exchanger 7 and a lithium bromide unit 8, a water outlet of the waste heat boiler 1 is communicated with a waste heat hot water pipeline 12 through a water outlet pipeline 11, water inlets of the chemical water supplementing heat exchanger 5, the primary gas heating heat exchanger 6 and the lithium bromide unit 8 are all communicated with the waste heat hot water pipeline 12, water outlets of the chemical water supplementing heat exchanger 5, the primary gas heating heat exchanger 6 and the lithium bromide unit 8 are communicated with a water return pipeline 13, the water return pipeline 13 is connected with a water inlet of the water return tank 3, a water outlet of the water return tank 3 is communicated with a water inlet pipeline 10 of the waste heat boiler 1 through a circulating water pipe, the energy storage device 2 is connected with the waste heat hot water pipeline 12, and the energy storage device 2 is arranged in parallel with the waste heat boiler 1.
Referring to fig. 2, in this embodiment, another heat consumer 15 is further included, an energy input end of the other heat consumer 15 is communicated with the waste heat hot water pipeline 12, and an energy output end of the other heat consumer 15 is communicated with the water return pipeline 13.
In this embodiment, the first-stage gas heating heat exchanger 6 is further connected to a second-stage gas heating heat exchanger 7, the second-stage gas heating heat exchanger 7 is connected to a gas turbine unit, and the first-stage gas heating heat exchanger 6 is provided with a gas electric heating device.
The operation method comprises the following steps: the waste heat of the flue gas is fully utilized through a heating surface 9 at the tail part of the waste heat boiler 1, and the heat of the waste heat of the flue gas is transferred into the boiler feed water; one part of the heated boiler feed water enters a low-pressure steam drum, and the other part of the heated boiler feed water enters a waste heat hot water pipeline 12 for a waste heat utilization system to use; the waste heat utilization system mainly comprises a chemical water heating system, a natural gas heating system, a user cold/heat supply system and other heat users 15; the waste heat utilization system exchanges heat with a user through an intermediate heat exchanger or waste heat utilization equipment; the energy storage device 2 ensures stable and flexible energy supply during high and low load peak shaving, unit shutdown or overhaul; the multiple units are combined in a parallel connection mode to form a waste heat utilization total system, and the waste heat utilization total system can be supplied independently or jointly.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should not be construed as being limited to the scope of the present invention, and any modifications and alterations made by those skilled in the art without departing from the spirit and scope of the present invention should fall within the scope of the present invention.
Claims (4)
1. A flue gas waste heat efficient utilization system of a gas combined supply system is characterized by comprising a waste heat boiler (1), an energy storage device (2), a water return tank (3), a chemical water supplementing heat exchanger (5), a primary gas heating heat exchanger (6), a secondary gas heating heat exchanger (7) and a lithium bromide unit (8), wherein a water outlet of the waste heat boiler (1) is communicated with a waste heat hot water pipeline (12) through a water outlet pipeline (11), water inlets of the chemical water supplementing heat exchanger (5), the primary gas heating heat exchanger (6) and the lithium bromide unit (8) are communicated with the waste heat hot water pipeline (12), water outlets of the chemical water supplementing heat exchanger (5), the primary gas heating heat exchanger (6) and the lithium bromide unit (8) are communicated with a water return pipeline (13), and the water return pipeline (13) is connected with a water inlet of the water return tank (3), the water outlet of the water return tank (3) is communicated with a water inlet pipeline (10) of the waste heat boiler (1) through a circulating water pipe (14), and the energy storage device (2) is connected with a waste heat hot water pipeline (12).
2. The system for efficiently utilizing the flue gas waste heat of the gas combined supply system according to claim 1, wherein the water inlet pipeline (10) and the circulating water pipe (14) are both provided with a water pump (4).
3. The system for efficiently utilizing the flue gas waste heat of the gas combined supply system according to claim 1, wherein the primary gas heating heat exchanger (6) is further connected with a secondary gas heating heat exchanger (7), the secondary gas heating heat exchanger (7) is connected to a gas turbine set, and the primary gas heating heat exchanger (6) is provided with a gas electric heating device.
4. The system for efficiently utilizing the flue gas waste heat of the gas combined supply system according to claim 1, wherein the energy storage device (2) is arranged in parallel with the waste heat boiler (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020213990.8U CN212841783U (en) | 2020-02-26 | 2020-02-26 | High-efficient utilization system of gas cogeneration system flue gas waste heat |
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| CN202020213990.8U CN212841783U (en) | 2020-02-26 | 2020-02-26 | High-efficient utilization system of gas cogeneration system flue gas waste heat |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111306596A (en) * | 2020-02-26 | 2020-06-19 | 华电电力科学研究院有限公司 | Efficient flue gas waste heat utilization system of gas combined supply system and operation method thereof |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111306596A (en) * | 2020-02-26 | 2020-06-19 | 华电电力科学研究院有限公司 | Efficient flue gas waste heat utilization system of gas combined supply system and operation method thereof |
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