CN219177793U - Domestic heat supply network coupling low-temperature economizer in-plant heating system and heat recovery device - Google Patents
Domestic heat supply network coupling low-temperature economizer in-plant heating system and heat recovery device Download PDFInfo
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- CN219177793U CN219177793U CN202223520006.0U CN202223520006U CN219177793U CN 219177793 U CN219177793 U CN 219177793U CN 202223520006 U CN202223520006 U CN 202223520006U CN 219177793 U CN219177793 U CN 219177793U
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Abstract
The utility model discloses a civil heat supply network coupling low-temperature economizer in-plant heat supply system and a heat recovery device, comprising at least two plate heat exchangers, at least two low-temperature economizers, an in-plant heat supply pipe network, an out-plant heat supply pipe network and a heat supply network heater, wherein the number of the plate heat exchangers is the same as that of the low-temperature economizers; the plate heat exchanger is connected with the low-temperature economizer through a plate heat exchanger water supply pipeline and a plate heat exchanger water return pipeline; the water supply manual valve of the plate heat exchanger is connected with the water return pipeline of the heat supply network heater and the water return pipeline of the internal heat network in the factory through the heat medium water communication water supply pipeline, and the water return manual valve of the plate heat exchanger is connected with the water supply pipeline of the heat supply network heater and the water supply pipeline of the internal heat network in the factory through the heat medium water communication water return pipeline; the heat supply network heater is connected with an external heat supply pipe network through an external heat supply network water supply pipeline and an external heat supply network water return pipeline, and the internal heat supply network water supply pipeline and the internal heat supply network water return pipeline are connected with an internal heat supply pipe network. The utility model can improve the heat recovery efficiency and meet the heat supply requirement of a factory.
Description
Technical Field
The utility model relates to the technical field of economizers, in particular to a civil heat supply network coupling low-temperature economizer in-plant heating system and a heat recovery device.
Background
For a coal-fired boiler of a thermal power plant, the exhaust gas temperature at the outlet of the boiler air preheater is usually higher and is generally about 140 ℃, so that a flue gas waste heat recovery device, also called a low-temperature economizer, is generated, and the heat of the flue gas is recovered by using the low-temperature economizer, so that a heat source can be provided for heat supply of a plant area, but when the low-temperature economizer is used for heat supply, the flue gas temperature needs to be regulated to 110-120 ℃ in order to ensure that the phenomena of flue gas condensation and low-temperature corrosion cannot occur, so that the heat recovery efficiency is low, and the heat supply requirement of the plant area cannot be met.
Disclosure of Invention
The utility model mainly aims to provide a civil heat supply network coupled low-temperature economizer in-plant heat supply system, which aims to improve the heat recovery efficiency.
In order to achieve the above object, the present utility model provides a civil heat supply network coupled low-temperature economizer in-plant heat supply system, the civil heat supply network coupled low-temperature economizer in-plant heat supply system comprising: the system comprises at least two plate heat exchangers, at least two low-temperature economizers, an in-plant heat supply pipe network, an out-plant heat supply pipe network and a heat supply network heater, wherein the number of the plate heat exchangers is the same as that of the low-temperature economizers, and the plate heat exchangers are in one-to-one correspondence connection with the low-temperature economizers;
the plate heat exchanger is connected with the low-temperature economizer through a plate heat exchanger water supply pipeline and a plate heat exchanger water return pipeline;
the manual water supply valve of the plate heat exchanger is connected with the water return pipeline of the heat supply network heater and the water return pipeline of the internal heat network of the factory through the heat medium water communication water supply pipeline, and the manual water return valve of the plate heat exchanger is connected with the water supply pipeline of the heat supply network heater and the water supply pipeline of the internal heat network of the factory through the heat medium water communication water return pipeline;
the heat supply network heater is connected with the external heat supply network through an external heat supply network water supply pipeline and an external heat supply network water return pipeline, and the internal heat supply network water supply pipeline and the internal heat supply network water return pipeline are connected with the internal heat supply network.
Optionally, a water supply manual valve of the heat supply network heater is arranged on a water supply pipeline of the heat supply network heater, and a water return manual valve of the heat supply network heater is arranged on a water return pipeline of the heat supply network heater.
Optionally, the return water port of the heat supply network heater is connected with a heat supply network circulating pump, and the heat supply network circulating pump is connected with the return water pipeline of the heat supply network heater and the return water pipeline of the heat supply network outside the factory.
Optionally, an electric water filter is arranged on the water return pipeline of the external heat supply network, and the electric water filter is connected with the water return pipeline of the heat supply network heater and the heat supply network circulating pump.
Optionally, the heat supply network heater is a shell-and-tube heat exchanger.
Optionally, a water supply manual valve of the heat supply network in the plant is arranged on the water supply pipeline of the heat supply network in the plant, and a water return manual valve and a pressure reducing valve of the heat supply network in the plant are arranged on the water return pipeline of the heat supply network in the plant.
Optionally, the heating medium water connection water supply pipeline is provided with a first heating medium water to heating network water supply manual valve and a second heating medium water to heating network water supply manual valve, and the heating medium water connection water return pipeline is provided with a first heating medium water to heating network water return manual valve and a second heating medium water to heating network water return manual valve.
Optionally, the water supply pipeline of the plate heat exchanger is sequentially provided with a backwater manual valve of the low-temperature economizer, a heat medium water pump and a water supply manual valve of the heat medium water to the plate heat exchanger along the direction of condensed water, and the water return pipeline of the plate heat exchanger is sequentially provided with a backwater manual valve of the heat medium water to the plate heat exchanger and a water supply manual valve of the low-temperature economizer along the direction of condensed water.
Optionally, the low-temperature economizer comprises a first low-temperature economizer and a second low-temperature economizer, and the first low-temperature economizer and the second low-temperature economizer operate in a time-sharing mode or operate simultaneously.
In addition, the utility model also provides a heat recovery device which comprises a civil heat supply network coupled low-temperature economizer in-plant heating system;
the civil heat supply network coupled low-temperature economizer in-plant heat supply system is used for recovering flue gas waste heat of the coal-fired boiler and meeting the heat supply requirement of a plant, and is configured as the civil heat supply network coupled low-temperature economizer in-plant heat supply system.
The utility model discloses an in-plant heating system and a heat recovery device of a civil heat supply network coupled low-temperature economizer, comprising at least two plate heat exchangers, at least two low-temperature economizers, an in-plant heating pipe network, an out-plant heating pipe network and a heat supply network heater, wherein the plate heat exchangers are the same in number as the low-temperature economizers, and are in one-to-one correspondence connection with the low-temperature economizers; the plate heat exchanger is connected with the low-temperature economizer through a plate heat exchanger water supply pipeline and a plate heat exchanger water return pipeline; the manual water supply valve of the plate heat exchanger is connected with the water return pipeline of the heat supply network heater and the water return pipeline of the internal heat network of the factory through the heat medium water communication water supply pipeline, and the manual water return valve of the plate heat exchanger is connected with the water supply pipeline of the heat supply network heater and the water supply pipeline of the internal heat network of the factory through the heat medium water communication water return pipeline; the heat supply network heater is connected with the external heat supply network through an external heat supply network water supply pipeline and an external heat supply network water return pipeline, and the internal heat supply network water supply pipeline and the internal heat supply network water return pipeline are connected with the internal heat supply network. According to the utility model, the heat supply network heater and the low-temperature economizer are coupled to provide heat for the plate heat exchanger, when the heat provided by the low-temperature economizer to the plate heat exchanger does not meet the heat supply requirement of a plant area, the low-temperature economizer is started to assist the low-temperature economizer to provide heat for the plate heat exchanger, and when the heat provided by the low-temperature economizer to the plate heat exchanger meets the heat supply requirement of the plant area, the heat recovery efficiency is improved and the heat supply requirement of the plant area is met.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a heat supply system in a civil heat supply network coupled low-temperature economizer plant according to an embodiment of the present utility model.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Reference numerals illustrate:
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
For a coal-fired boiler of a thermal power plant, the exhaust gas temperature at the outlet of the boiler air preheater is usually higher and is generally about 140 ℃, so that a flue gas waste heat recovery device, also called a low-temperature economizer, is generated, and the heat of the flue gas is recovered by using the low-temperature economizer, so that a heat source can be provided for heat supply of a plant area, but when the low-temperature economizer is used for heat supply, the flue gas temperature needs to be regulated to 110-120 ℃ in order to ensure that the phenomena of flue gas condensation and low-temperature corrosion cannot occur, so that the heat recovery efficiency is low, and the heat supply requirement of the plant area cannot be met.
The low-temperature economizer adopts a finned tube as a heat exchange element, water is introduced into the finned tube, flue gas flows through the outer wall of the finned tube, and the water absorbs the heat of the flue gas through the finned tube because the water temperature is lower than the flue gas temperature, so that the flue gas temperature is reduced when the water temperature is increased. The installation position of the low-temperature economizer is mostly arranged on the flue connected with the electric dust removal inlet of the outlet of the air preheater, so that the temperature of flue gas entering the electric dust remover can be reduced, the specific resistance of fly ash can be reduced, the dust removal efficiency of the electric dust remover is improved, the forced cooling water consumption of a desulfurization system for reducing the temperature of the flue gas to the optimal process temperature of desulfurization can be reduced after the flue gas is cooled, and the energy-saving desulfurization system has the effect of 'water conservation'. The water heated in the finned tube of the low-temperature economizer can be used as a heat source of a heater to heat the air inlet of the boiler; the device can be used for heating the condensed water at the outlet of the condensed water pump; and a heat source can be provided for the heat supply of the plant area, so that a system for providing high-quality steam for the heat supply of the plant area is omitted.
The utility model provides an in-plant heating system with civil heat supply network coupling low-temperature economizers, and referring to fig. 1, in an embodiment, the in-plant heating system comprises a first plate heat exchanger 1, a second plate heat exchanger 2, a first low-temperature economizer 3, a second low-temperature economizer 4, a heat supply network heater 5, an in-plant heating network and an out-plant heating network, wherein the first plate heat exchanger 1 is connected with the first low-temperature economizer 3 through a first plate heat exchanger water supply pipeline 6 and a first plate heat exchanger water return pipeline 7, the second plate heat exchanger 2 is connected with the second low-temperature economizer 4 through a second plate heat exchanger water supply pipeline 8 and a second plate heat exchanger water return pipeline 9, a water supply manual valve 18 of the first plate heat exchanger is connected with a water supply manual valve 20 of the second plate heat exchanger through a heat medium communication pipeline 10, a heat supply network heater return pipeline 13 and an out-plant heating network return pipeline 15, a water supply manual valve 19 of the first plate heat exchanger is connected with the water supply network heater network 14 through a second plate heat exchanger water supply pipeline 11 and a water supply network return pipeline 14, and a water supply network heater network 14 is connected with the heat supply network 14 through a water supply network manual valve 21 of the second plate heat exchanger back to the heat exchanger water supply network 5.
The water supply pipeline 6 of the first plate heat exchanger is sequentially provided with a backwater manual valve 30 of the first low-temperature economizer, a first heat medium water pump 37 and a water supply manual valve 22 of the heat medium water to the first plate heat exchanger along the flow direction of condensed water, the backwater manual valve 23 of the heat medium water to the first plate heat exchanger and the water supply manual valve 31 of the first low-temperature economizer are sequentially arranged on the backwater pipeline 7 of the first plate heat exchanger along the flow direction of condensed water, the first low-temperature economizer 3 is positioned in a flue of an electric dust removal inlet of an outlet of a boiler air preheater, the first plate heat exchanger 1 heats the condensed water by using heat of the heat medium water, and the first heat medium water pump 37 is used for providing circulating power.
The water supply pipeline 8 of the second plate heat exchanger is sequentially provided with a water return manual valve 32 of the second low-temperature economizer, a second heat medium water pump 38 and a water supply manual valve 24 of the second plate heat exchanger along the flow direction of condensed water, and the water return manual valve 25 of the second plate heat exchanger and the water supply manual valve 33 of the second low-temperature economizer are sequentially provided with heat medium water to the second plate heat exchanger along the flow direction of condensed water.
Wherein the first low-temperature economizer 3 and the second low-temperature economizer 4 are operated in a time-sharing manner or simultaneously, in particular, the first low-temperature economizer 3 and the second low-temperature economizer 4 can be simultaneously used for providing a heat source and can also independently provide a heat source, for example, after the first low-temperature economizer 3 is shut down, the second low-temperature economizer 4 can independently provide a heat source.
The heat medium water connection water supply pipeline 10 is provided with a first heat medium water to heat network water supply manual valve 26 and a second heat medium water to heat network water supply manual valve 28, and the heat medium water connection water return pipeline 11 is provided with a first heat medium water to heat network water return manual valve 27 and a second heat medium water to heat network water return manual valve 29.
Wherein, the water supply pipeline 12 of the heat supply network heater is provided with a water supply manual valve 41 of the heat supply network heater, and the water return pipeline 13 of the heat supply network heater is provided with a water return manual valve 42 of the heat supply network heater.
The water return port of the heat supply network heater 5 is connected with a heat supply network circulating pump 39, and the heat supply network circulating pump 39 is connected with the heat supply network heater water return pipeline 13 and the off-plant heat supply network water return pipeline 16.
Wherein, an electric water filter 40 is arranged on the external heat supply network water return pipeline 16, and the electric water filter 40 is connected with the heat supply network heater water return pipeline 13 and the heat supply network circulating pump 39.
Wherein, the water supply pipeline 14 of the in-plant heat supply network is provided with a water supply manual valve 34 of the in-plant heat supply network, and the water return pipeline 15 of the in-plant heat supply network is provided with a water return manual valve 35 and a pressure reducing valve 36 of the in-plant heat supply network.
Alternatively, the heat supply network heater 5 may be a shell-and-tube heat exchanger, and two machines with five sections of steam extraction are connected in parallel on the shell side to provide superheated steam for the heat supply network heater 5, and the tube side is heat supply network circulating water, and the heat supply network circulating pump 39 is used for providing power for the hot water of the heat supply network outside the plant.
In the embodiment of the present application, it should be noted that, the first low-temperature economizer 3, the second low-temperature economizer 4, and the heat supply network heater 5 are three devices for providing heat sources, and by changing the open states of the valve and the water pump, the working mode of the domestic heat supply network coupled low-temperature economizer in-plant heating system may be changed.
When the system is in normal operation and the heat supply network heater 5 is not opened, the first low-temperature economizer 3 and the second low-temperature economizer 4 can provide heat sources for the first plate heat exchanger 1 and the second plate heat exchanger 2, wherein the plate heat exchangers are divided into a main machine plate heat exchanger and an temporary plate heat exchanger, generally, the main machine plate heat exchanger is a plate heat exchanger which is started first and is not closed, the temporary plate heat exchanger is a plate heat exchanger which is started later, when the temporary plate heat exchanger is started, the heat of the temporary plate heat exchanger at the moment is zero, and condensed water is heated by the temporary plate heat exchanger which is started later through the main machine plate heat exchanger which is started first, so that the target temperature can be reached when the boiler is filled with water.
In an embodiment, the working mode of the domestic heat supply network coupling low-temperature economizer in-plant heat supply system may be that a low-temperature economizer is adopted to provide a heat source for a plate heat exchanger, and it may be assumed that the first plate heat exchanger 1 is used as a local machine, the second plate heat exchanger 2 is used as an temporary machine, and when the unit is in normal operation and the second plate heat exchanger 2 is not opened, the first heat medium water pump 37 may be started by opening the water supply manual valve 18 of the first plate heat exchanger, the water return manual valve 19 of the first plate heat exchanger, the water supply manual valve 22 of the heat medium water to the first plate heat exchanger, the water return manual valve 23 of the heat medium water to the first plate heat exchanger, the water return manual valve 30 of the first low-temperature economizer and the water return manual valve 31 of the first low-temperature economizer, and the first heat medium water supply manual valve 26 and the first heat medium water return manual valve 27 are closed, so that the first heat medium water pump 37 is started to provide a heat source for the first plate heat exchanger 1 by the first low-temperature economizer 3; when the unit normally operates and the second plate heat exchanger 2 is opened, the first plate heat exchanger 1 can provide a heat source for the second plate heat exchanger 2 by opening the water supply manual valve 20 of the second plate heat exchanger, the water return manual valve 21 of the second plate heat exchanger, the first heat medium water to heat network water supply manual valve 26, the first heat medium water to heat network water return manual valve 27, the second heat medium water to heat network water supply manual valve 28 and the second heat medium water to heat network water return manual valve 29, and closing the water supply manual valve 24 of the heat medium water to the second plate heat exchanger and the water return manual valve 25 of the heat medium water to the second plate heat exchanger; when the heat required by the second plate heat exchanger is relatively large, the water supply manual valve 18 and the water return manual valve 19 of the first plate heat exchanger can be closed, so that the first low-temperature economizer 3 only provides a heat source for the second plate heat exchanger 2.
In an embodiment, the working mode of the civil heat supply network coupled low-temperature economizer in-plant heat supply system may be that a low-temperature economizer is used for providing heat sources for the plate heat exchanger and the in-plant heat supply network, taking the first low-temperature economizer 3 as an example, by opening the first heat medium water-to-heat network water supply manual valve 26, the first heat medium water-to-heat network water return manual valve 27, the in-plant heat supply network water supply manual valve 34 and the in-plant heat supply network water return manual valve 35, so that the first low-temperature economizer 3 operates normally, and the first low-temperature economizer 3 provides heat sources for the first plate heat exchanger 1 and the in-plant heat supply network, wherein the pressure reducing valve 36 may enable the water supply pressure of the in-plant heat supply network to be maintained at a set value.
In an embodiment, the working mode of the civil heat supply network coupled low-temperature economizer in-plant heat supply system may be to use a heat supply network heater to provide heat sources for an out-plant heat supply network and an in-plant heat supply network, specifically, by opening the water supply manual valve 34 of the in-plant heat supply network, the water return manual valve 35 of the in-plant heat supply network, the water supply manual valve 41 of the heat supply network heater and the water return manual valve 42 of the heat supply network heater, closing the first heat medium water supply manual valve 26, the first heat medium water supply manual valve 27, the second heat medium water supply manual valve 28 and the second heat medium water supply manual valve 29 of the heat supply network, the heat supply network circulation pump 39 may be opened to provide power for the out-plant heat supply network, and the circulation flow of the in-plant heat supply network is adjusted by closing the water supply manual valve 34 of the in-plant heat supply network and the water return manual valve 35 of the in-plant heat supply network, so as to satisfy the circulation flow and pressure of the in-plant heat supply network, thereby realizing that the heat supply network heater 5 provides heat for the out-plant heat supply network and the in-plant heat supply network.
In an embodiment, the working mode of the domestic heat supply network coupling low-temperature economizer in-plant heat supply system can provide heat sources for the heat supply network heater to the off-plant heat supply network, the in-plant heat supply network and the plate heat exchangers, taking the first plate heat exchanger 1 as an example, by opening the water supply manual valve 41 of the heat supply network heater, the water return manual valve 42 of the heat supply network heater, the water supply manual valve 34 of the in-plant heat supply network, the water return manual valve 35 of the in-plant heat supply network, the water supply manual valve 18 of the first plate heat exchanger, the water return manual valve 19 of the first plate heat exchanger, the first heat medium water supply manual valve 26 and the first heat medium water supply manual valve 27, and closing the water supply manual valve 22 of the heat medium water supply to the first plate heat exchanger, the water return manual valve 23 of the heat medium water supply manual valve 28 and the second heat medium water supply manual valve 29 of the heat supply network, the heat supply network heater 5 can provide heat supply for the first plate heat exchanger 1, the off-plant heat supply network and the off-plant heat supply network.
According to the embodiment of the application, the heat is provided for the plate heat exchanger through the coupling heat supply network heater and the low-temperature economizer, when the heat provided for the plate heat exchanger by the low-temperature economizer does not reach the heat supply requirement of a factory, the low-temperature economizer is assisted to provide the heat for the plate heat exchanger by opening the heat supply network heater, when the heat provided for the plate heat exchanger by the low-temperature economizer reaches the heat supply requirement of the factory, the heat supply network heater does not need to be opened, and only the heat is provided for the plate heat exchanger by the low-temperature economizer, so that the heat recovery efficiency is improved, and the heat supply requirement of the factory is met.
The utility model also provides a heat recovery device, which comprises a civil heat supply network coupled low-temperature economizer in-plant heat supply system, wherein the civil heat supply network coupled low-temperature economizer in-plant heat supply system is used for recovering flue gas waste heat of a coal-fired boiler, so as to meet the heat supply requirement of a plant, and the structure of the civil heat supply network coupled low-temperature economizer in-plant heat supply system can refer to the embodiment and is not repeated herein. It should be noted that, because the heat recovery device of this embodiment adopts the technical scheme of the civil heat supply network coupled low-temperature economizer in-plant heating system, the heat recovery device has all the beneficial effects of the civil heat supply network coupled low-temperature economizer in-plant heating system.
The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. The utility model provides a civilian heat supply network coupling low temperature economizer in-plant heating system which characterized in that, civilian heat supply network coupling low temperature economizer in-plant heating system includes: the system comprises at least two plate heat exchangers, at least two low-temperature economizers, an in-plant heat supply pipe network, an out-plant heat supply pipe network and a heat supply network heater, wherein the number of the plate heat exchangers is the same as that of the low-temperature economizers, and the plate heat exchangers are in one-to-one correspondence connection with the low-temperature economizers;
the plate heat exchanger is connected with the low-temperature economizer through a plate heat exchanger water supply pipeline and a plate heat exchanger water return pipeline;
the manual water supply valve of the plate heat exchanger is connected with the water return pipeline of the heat supply network heater and the water return pipeline of the internal heat network of the factory through the heat medium water communication water supply pipeline, and the manual water return valve of the plate heat exchanger is connected with the water supply pipeline of the heat supply network heater and the water supply pipeline of the internal heat network of the factory through the heat medium water communication water return pipeline;
the heat supply network heater is connected with the external heat supply network through an external heat supply network water supply pipeline and an external heat supply network water return pipeline, and the internal heat supply network water supply pipeline and the internal heat supply network water return pipeline are connected with the internal heat supply network.
2. The domestic heat supply network coupled low-temperature economizer in-plant heating system according to claim 1 wherein a water supply manual valve of the heat supply network heater is arranged on a water supply pipeline of the heat supply network heater, and a water return manual valve of the heat supply network heater is arranged on a water return pipeline of the heat supply network heater.
3. The domestic heat supply network coupled low-temperature economizer in-plant heating system according to claim 1 wherein a water return port of the heat supply network heater is connected with a heat supply network circulating pump, and wherein the heat supply network circulating pump is connected with the heat supply network heater water return pipeline and the off-plant heat supply network water return pipeline.
4. A domestic heat supply network coupled low-temperature economizer in-plant heating system as recited in claim 3 wherein said off-plant heat supply network return line is provided with an electric water filter connecting said heat supply network heater return line and said heat supply network circulation pump.
5. A domestic heat supply network coupled low-temperature economizer in-plant heating system as in any one of claims 1-4 wherein the heat supply network heater is a shell-and-tube heat exchanger.
6. The domestic heat supply network coupled low-temperature economizer in-plant heating system according to claim 1, wherein a water supply manual valve of the in-plant heating network is arranged on a water supply pipeline of the in-plant heating network, and a water return manual valve and a pressure reducing valve of the in-plant heating network are arranged on a water return pipeline of the in-plant heating network.
7. The domestic heat supply network coupled low-temperature economizer in-plant heating system according to claim 1, wherein a first heat medium water-to-heat network water supply manual valve and a second heat medium water-to-heat network water supply manual valve are arranged on the heat medium water communication water supply pipeline, and a first heat medium water-to-heat network water return manual valve and a second heat medium water-to-heat network water return manual valve are arranged on the heat medium water communication water return pipeline.
8. The domestic heat supply network coupled low-temperature economizer in-plant heating system according to claim 1, wherein a water return manual valve, a heat medium water pump and a heat medium water supply manual valve of the low-temperature economizer are sequentially arranged on a water supply pipeline of the plate heat exchanger along the flow direction of condensate water, and a heat medium water supply manual valve and a water supply manual valve of the low-temperature economizer are sequentially arranged on a water return pipeline of the plate heat exchanger along the flow direction of condensate water.
9. The domestic heat network coupled low-temperature economizer in-plant heating system of claim 1 wherein the low-temperature economizer comprises a first low-temperature economizer and a second low-temperature economizer, the first low-temperature economizer and the second low-temperature economizer operating in a time-sharing manner or simultaneously.
10. A heat recovery device, characterized in that it comprises a civil heat supply network coupled low-temperature economizer in-plant heating system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223520006.0U CN219177793U (en) | 2022-12-28 | 2022-12-28 | Domestic heat supply network coupling low-temperature economizer in-plant heating system and heat recovery device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223520006.0U CN219177793U (en) | 2022-12-28 | 2022-12-28 | Domestic heat supply network coupling low-temperature economizer in-plant heating system and heat recovery device |
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| CN219177793U true CN219177793U (en) | 2023-06-13 |
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| CN202223520006.0U Active CN219177793U (en) | 2022-12-28 | 2022-12-28 | Domestic heat supply network coupling low-temperature economizer in-plant heating system and heat recovery device |
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| CN (1) | CN219177793U (en) |
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