CN211952970U - Water heating system based on boiler flue gas heat recovery - Google Patents
Water heating system based on boiler flue gas heat recovery Download PDFInfo
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- CN211952970U CN211952970U CN202020261157.0U CN202020261157U CN211952970U CN 211952970 U CN211952970 U CN 211952970U CN 202020261157 U CN202020261157 U CN 202020261157U CN 211952970 U CN211952970 U CN 211952970U
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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
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- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model provides a heating water system based on boiler flue gas heat recovery, it includes: the heat supply network water supply main pipe, the heat supply network backwater main pipe, the flue gas waste heat recovery system and the flow control unit. The heat supply network water supply main pipe and the heat supply network water return main pipe are connected through a liquid supply pipeline, and liquid flow conveyed by the heat supply network water supply main pipe can enter a flue gas waste heat recovery system through the liquid supply pipeline for heating; the flow control unit comprises a first gate valve, a second gate valve and a controller, when the first gate valve is closed, liquid flow of the heat supply network water supply main pipe is conveyed through the liquid supply pipeline and is heated by the flue gas waste heat recovery system, and the liquid flow is limited to be conveyed by one side of the heat supply network water return main pipe, so that the liquid flow heating energy efficiency is improved. When the first gate valve is opened, partial liquid flow can be conveyed through two sides of the heat supply network return water main pipe, so that the pressure of the liquid flow on the heat supply network return water main pipe and the liquid supply pipeline is relieved, the phenomenon that the heat supply system and the pipeline are impacted due to overlarge pressure is prevented, and the working stability is ensured.
Description
Technical Field
The utility model relates to a boiler heat supply technical field especially relates to a heating water system based on boiler flue gas heat recovery.
Background
The heat loss of the exhaust smoke is the largest part of heat loss of the industrial boiler, the research on the heat loss of the exhaust smoke of the boiler from the aspects of economic and social benefits is carried out through engineering examples, the waste heat recovery efficiency and the energy utilization rate of an original system are improved, meanwhile, the pollutant emission is greatly reduced, the call of energy conservation and emission reduction in the world is responded, and the significance is great.
In boiler heating system, large-scale boiler flue gas waste heat availability progressively promotes, and current flue gas waste heat system solution is more, but there is the problem that can't be absorbed in the flue gas waste heat of retrieving, and the unable effective utilization of waste heat not only causes the investment waste, can produce great resource consumption moreover, can't effectively obtain make full use of through retrieving the flue gas waste heat. The flue gas recovery system is used for heating water supplied by a heat supply network, the water supplied by the heat supply network is recycled in the heat supply system, and the flue gas waste heat recovery system is used for fully utilizing heat obtained in the flue gas of a boiler. Therefore, how to improve the heating efficiency of the water supply of the heat supply network by the flue gas recovery system is a technical problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the technical problem to be solved by the present invention is: how to improve by based on flue gas recovery system to the heating efficiency of heat supply network water supply, improve the heating efficiency.
In order to achieve the above object, the utility model provides a heating water system based on boiler flue gas heat recovery, it includes: the heat supply network supplies water female pipe, the female pipe of heat supply network return water, flue gas waste heat recovery system, still includes flow control unit, wherein: the heat supply network water supply main pipe and the heat supply network water return main pipe are connected through a liquid supply pipeline, and liquid flow conveyed by the heat supply network water supply main pipe can enter the flue gas waste heat recovery system through the liquid supply pipeline for heating; the flow control unit comprises a first gate valve, a second gate valve and a controller, the first gate valve and the second gate valve are electrically connected with the controller, and the controller controls the on-off state of the first gate valve and the second gate valve; by first gate valve control flow through the liquid stream on the female pipe of heat supply network return water, by second gate valve control flow through the liquid stream on the female pipe of heat supply network water supply, the controller control the second gate valve is the open mode, the controller control first gate valve is for closing and open the state that the intermittent type switched, wherein, the duration of the closed mode of first gate valve is greater than the duration of the open mode of first gate valve.
Furthermore, a heat meter is arranged on the liquid supply pipeline and is electrically connected with the controller.
Further, when the first gate valve and the second gate valve are both opened, liquid flows to the two sides of the heat supply network return water main pipe through the liquid supply pipeline so as to reduce the liquid flow pressure in the liquid supply pipeline.
Further, when the first gate valve is closed and the second gate valve is opened, liquid flows to one side of the heat supply network return water main pipe through the liquid supply pipeline.
Compared with the prior art, the utility model provides a heating water system based on boiler flue gas heat recovery, it includes: the heat supply network water supply main pipe, the heat supply network backwater main pipe, the flue gas waste heat recovery system and the flow control unit. The heat supply network water supply main pipe and the heat supply network water return main pipe are connected through a liquid supply pipeline, and liquid flow conveyed by the heat supply network water supply main pipe can enter a flue gas waste heat recovery system through the liquid supply pipeline for heating; the flow control unit comprises a first gate valve, a second gate valve and a controller, the first gate valve and the second gate valve are electrically connected with the controller, and the controller controls the on-off state of the first gate valve and the second gate valve; the first gate valve controls liquid flow on the heat supply network water return main pipe, the second gate valve controls liquid flow on the heat supply network water supply main pipe, the controller controls the second gate valve to be in an opening state, and the controller controls the first gate valve to be in a state of being switched between a closing state and an opening state. When the first gate valve is closed, the liquid flow of the heat supply network water supply main pipe is conveyed through the liquid supply pipeline and is heated by the flue gas waste heat recovery system, the liquid flow is limited to be conveyed by one side of the heat supply network water return main pipe, and the heat supply efficiency and the liquid flow heating energy efficiency flowing through the liquid supply pipeline are improved. When the first gate valve is opened, partial liquid flow can be conveyed through two sides of the heat supply network water return main pipe, so that the pressure of the liquid flow on the heat supply network water return main pipe and the liquid supply pipeline is relieved, the phenomenon that the pressure is too large to impact a heat supply system and the pipeline is avoided, and the working stability of the heat supply system is improved.
Drawings
Fig. 1 is a schematic system diagram of a water heating system based on boiler flue gas heat recovery in the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Please refer to fig. 1, the present invention provides a water heating system based on boiler flue gas heat recovery, which comprises: the heat supply network water supply main pipe, the heat supply network backwater main pipe, the flue gas waste heat recovery system and the flow control unit.
The heat supply network water supply main pipe and the heat supply network water return main pipe are connected through a liquid supply pipeline, and liquid flow conveyed by the heat supply network water supply main pipe can enter the flue gas waste heat recovery system through the liquid supply pipeline to be heated. And a heat meter is arranged on the liquid supply pipeline and is electrically connected with the controller. The flue gas waste heat recovery device is a device for recovering and recycling heat, and is well known to those skilled in the art, and the details of the flue gas waste heat recovery device are not described herein.
The flow control unit comprises a first gate valve 1, a second gate valve 2 and a controller, wherein the first gate valve 1 and the second gate valve 2 are electrically connected with the controller, and the controller controls the on-off state of the first gate valve 1 and the second gate valve 2.
The first gate valve 1 controls liquid flow flowing through the heat supply network water return main pipe, the second gate valve 2 controls liquid flow flowing through the heat supply network water supply main pipe, the controller controls the second gate valve 2 to be in an opening state, and the controller controls the first gate valve 1 to be in a state of being intermittently switched between closing and opening.
When the first gate valve 1 and the second gate valve 2 are both opened, liquid flows to the two sides of the heat supply network return water main pipe through the liquid supply pipeline so as to reduce the liquid flow pressure in the liquid supply pipeline. When the first gate valve 1 is opened, partial liquid flow can be conveyed through two sides of the heat supply network water return main pipe, so that the pressure of the liquid flow on the heat supply network water return main pipe and the liquid supply pipeline is relieved, the phenomenon that the pressure is too large to impact a heat supply system and the pipeline is avoided, and the working stability of the heat supply system is improved.
When the first gate valve 1 is closed and the second gate valve 2 is opened, the liquid flows to one side of the heat supply network return water main pipe through the liquid supply pipeline. When the first gate valve 1 is closed, the liquid flow of the heat supply network water supply main pipe is conveyed through the liquid supply pipeline and is heated by the flue gas waste heat recovery system, the liquid flow is limited to be conveyed by one side of the heat supply network water return main pipe, and the heat supply efficiency and the liquid flow heating energy efficiency flowing through the liquid supply pipeline are improved.
The duration of the closed state of first gate valve 1 is greater than the duration of the open state of first gate valve 1, and then realizes the action of liquid stream pressure release in liquid supply pipeline and the heat supply network return manifold with short time, guarantees to be used for the heated liquid stream flow via the liquid supply pipeline is carried, improves the heating efficiency.
To sum up, the utility model provides a heating water system based on boiler flue gas heat recovery, it includes: the heat supply network water supply main pipe, the heat supply network backwater main pipe, the flue gas waste heat recovery system and the flow control unit. The heat supply network water supply main pipe and the heat supply network water return main pipe are connected through a liquid supply pipeline, and liquid flow conveyed by the heat supply network water supply main pipe can enter a flue gas waste heat recovery system through the liquid supply pipeline for heating; the flow control unit comprises a first gate valve, a second gate valve and a controller, the first gate valve and the second gate valve are electrically connected with the controller, and the controller controls the on-off state of the first gate valve and the second gate valve; the first gate valve controls liquid flow on the heat supply network water return main pipe, the second gate valve controls liquid flow on the heat supply network water supply main pipe, the controller controls the second gate valve to be in an opening state, and the controller controls the first gate valve to be in a state of being switched between a closing state and an opening state. When the first gate valve is closed, the liquid flow of the heat supply network water supply main pipe is conveyed through the liquid supply pipeline and is heated by the flue gas waste heat recovery system, the liquid flow is limited to be conveyed by one side of the heat supply network water return main pipe, and the heat supply efficiency and the liquid flow heating energy efficiency flowing through the liquid supply pipeline are improved. When the first gate valve is opened, partial liquid flow can be conveyed through two sides of the heat supply network water return main pipe, so that the pressure of the liquid flow on the heat supply network water return main pipe and the liquid supply pipeline is relieved, the phenomenon that the pressure is too large to impact a heat supply system and the pipeline is avoided, and the working stability of the heat supply system is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (4)
1. The utility model provides a heating water system based on boiler flue gas heat recovery which characterized in that, it includes: the heat supply network supplies water female pipe, the female pipe of heat supply network return water, flue gas waste heat recovery system, still includes flow control unit, wherein:
the heat supply network water supply main pipe and the heat supply network water return main pipe are connected through a liquid supply pipeline, and liquid flow conveyed by the heat supply network water supply main pipe can enter the flue gas waste heat recovery system through the liquid supply pipeline for heating;
the flow control unit comprises a first gate valve, a second gate valve and a controller, the first gate valve and the second gate valve are electrically connected with the controller, and the controller controls the on-off state of the first gate valve and the second gate valve;
by first gate valve control flow through the liquid stream on the female pipe of heat supply network return water, by second gate valve control flow through the liquid stream on the female pipe of heat supply network water supply, the controller control the second gate valve is the open mode, the controller control first gate valve is for closing and open the state that the intermittent type switched, wherein, the duration of the closed mode of first gate valve is greater than the duration of the open mode of first gate valve.
2. A heated water system based on boiler flue gas heat recovery as claimed in claim 1 wherein a heat meter is provided on the feed line, the heat meter being electrically connected to the controller.
3. The boiler flue gas heat recovery based heating water system of claim 1, wherein when the first gate valve and the second gate valve are both open, liquid flows to both sides of the heat supply network return water main via the liquid supply line to reduce the liquid flow pressure in the liquid supply line.
4. The boiler flue gas heat recovery based heating water system as claimed in claim 1, wherein when the first gate valve is closed and the second gate valve is opened, a liquid flow flows to one side of the heat network return water main through the liquid supply line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020261157.0U CN211952970U (en) | 2020-03-05 | 2020-03-05 | Water heating system based on boiler flue gas heat recovery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020261157.0U CN211952970U (en) | 2020-03-05 | 2020-03-05 | Water heating system based on boiler flue gas heat recovery |
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| CN211952970U true CN211952970U (en) | 2020-11-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112611010A (en) * | 2020-11-30 | 2021-04-06 | 华北电力大学 | Flexible adjusting system and method for power generation load of multi-heat-source cogeneration unit |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112611010A (en) * | 2020-11-30 | 2021-04-06 | 华北电力大学 | Flexible adjusting system and method for power generation load of multi-heat-source cogeneration unit |
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