CN219264340U - Flue gas waste heat utilization system - Google Patents
Flue gas waste heat utilization system Download PDFInfo
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- CN219264340U CN219264340U CN202320306285.6U CN202320306285U CN219264340U CN 219264340 U CN219264340 U CN 219264340U CN 202320306285 U CN202320306285 U CN 202320306285U CN 219264340 U CN219264340 U CN 219264340U
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- flue gas
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- supplementing
- waste heat
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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 relates to a flue gas waste heat utilization system, which relates to the field of flue gas treatment equipment, wherein a liquid outlet of a flue gas cooler is communicated with a water inlet of a heating medium water heater, a water outlet of the heating medium water heater is communicated with a liquid inlet of the flue gas cooler, a desalting water main pipe is provided with a desalting water pump, an outlet of the desalting water main pipe is communicated with an inlet of a high-level water tank through a water supplementing pipeline, a water supplementing valve is arranged on the water supplementing pipeline, and an outlet of the high-level water tank is communicated with a circulating water inlet pipe. The beneficial effects are that: the demineralized water main pipe is utilized to provide water pressure for the demineralized water pump, the demineralized water is conveyed to the high-level water tank, the water supplementing pump is saved, the influence of frequent start and stop of the water supplementing pump on the system safety is reduced, and the cost is saved. The automatic opening and closing function of the water supplementing valve is utilized, so that the desalted water main pipe is communicated with or disconnected from the high-level water tank, the automatic adjustment of the liquid level of the high-level water tank is convenient, the operation of personnel is reduced, and the overhaul work of a subsequent system is also reduced.
Description
Technical Field
The utility model relates to the field of flue gas treatment equipment, in particular to a flue gas waste heat utilization system.
Background
In the thermal power plant, a fixed type heating medium water heater is arranged in a rear air duct of a steam heater on a wind supply pipeline of a blower and a primary fan. The secondary flue gas cooler is arranged at the rear part of the primary flue gas cooler on 4 horizontal flues at the inlet of the dust remover, and the flue gas-air heating system is formed by a closed circulation pipeline, a circulation pump and the like and a fixed heat medium water heater.
In order to ensure that the system is filled with water all the time and achieves better heat exchange effect, a high-level water tank is arranged at a higher position of a factory building, and demineralized water is pumped into the high-level water tank through a water supplementing pump, so that the high-level water tank is maintained in a certain liquid level range. Thereby ensuring the normal liquid level and pressure of the system.
However, the frequent start and stop of the water supplementing pump increases the probability of the water supplementing pump fault, and simultaneously increases the labor and the overhaul and maintenance workload, and the water supplementing pump is not energy-saving, so that the energy consumption is increased.
Disclosure of Invention
The utility model aims to solve the technical problems of supplementing water to a high-level water tank and reducing energy consumption and failure rate.
The technical scheme for solving the technical problems is as follows: the utility model provides a flue gas waste heat utilization system, includes flue gas cooler, hot-water heater, high-order water tank, demineralized water main pipe and moisturizing electric valve, the liquid outlet of flue gas cooler with the water inlet intercommunication of hot-water heater, the delivery port of hot-water heater with the inlet of flue gas cooler passes through circulating water feed liquor pipe intercommunication, have the demineralized water pump on the demineralized water main pipe, the export of demineralized water main pipe with the import of high-order water tank passes through the moisturizing pipeline intercommunication, be equipped with on the moisturizing pipeline moisturizing electric valve, the export of high-order water tank with circulating water feed liquor pipe intercommunication.
The beneficial effects of the utility model are as follows: the demineralized water main pipe is utilized to provide water pressure for the demineralized water pump with the demineralized water main pipe, the demineralized water is conveyed to the high-level water tank, the water supplementing pump which is originally required to be installed on the water supplementing pipeline is saved, the influence of frequent start and stop of the water supplementing pump on the system safety is reduced, and the cost is saved. The automatic opening and closing function of the water supplementing valve is utilized, so that the desalted water main pipe is communicated with or disconnected from the high-level water tank, the automatic adjustment of the liquid level of the high-level water tank is convenient, the operation of personnel is reduced, and the overhaul work of a subsequent system is also reduced.
On the basis of the technical scheme, the utility model can be improved as follows.
Further, the water supplementing device further comprises a water supplementing bypass pipeline and a bypass valve, wherein two ends of the water supplementing bypass pipeline are respectively communicated with the water supplementing pipeline at two ends of the water supplementing valve, and the bypass valve is arranged on the water supplementing bypass pipeline.
The beneficial effects of adopting the further scheme are as follows: when the water supplementing valve needs maintenance or the water supplementing pipeline fails, the bypass valve can be opened to supplement water to the high-level water tank by utilizing the water supplementing bypass pipeline.
Further, the bypass valve is a manual valve.
Further, the water supply system further comprises two protection valves, wherein the two protection valves are respectively arranged on the water supply pipelines at two ends of the water supply valve and are positioned between two ends of the water supply bypass pipeline.
The beneficial effects of adopting the further scheme are as follows: when the water supplementing valve works normally, the two protection valves are opened. When the water supplementing valve needs to be maintained, the two protection valves are closed to protect the water supplementing valve, and the water flow is prevented from continuously impacting the water supplementing valve to damage the water supplementing valve.
Further, the protection valve is a manual valve.
Further, a circulating water pump is further arranged on the circulating water inlet pipe.
The beneficial effects of adopting the further scheme are as follows: the circulating water pump provides power to enable desalted water to circularly flow in a loop formed by the flue gas cooler and the heating medium water heater.
Further, the liquid level of the high-level water tank is controlled to be 300-600mm through the water supplementing valve.
Further, the water pressure of the desalted water main pipe is more than or equal to 0.6MPa.
The beneficial effects of adopting the further scheme are as follows: the water pressure of the desalted water main pipe can output desalted water to the high-level water tank positioned at the height of tens of meters.
Drawings
FIG. 1 is a schematic diagram of a flue gas waste heat utilization system according to the present utility model;
fig. 2 is a schematic diagram of the water replenishing electric valve of the present utility model.
In the drawings, the list of components represented by the various numbers is as follows:
1. a flue gas cooler; 2. a heating medium water heater; 3. a high level water tank; 4. a desalted water main pipe; 5. supplementing water to the water valve; 6. a circulating water inlet pipe; 7. a water replenishing pipe; 8. a water replenishment bypass line; 9. a bypass valve; 10. a protection valve; 11. and (3) a circulating water pump.
Detailed Description
The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.
As shown in fig. 1 and 2, this embodiment provides a flue gas waste heat utilization system, including flue gas cooler 1, hot-water heater 2, high-level water tank 3, demineralized water main pipe 4 and moisturizing electric valve 5, the liquid outlet of flue gas cooler 1 with the water inlet of hot-water heater 2 communicates, the delivery port of hot-water heater 2 with the inlet of flue gas cooler 1 passes through circulating water feed pipe 6 intercommunication, have the demineralized water pump on the demineralized water main pipe 4, the export of demineralized water main pipe 4 with the import of high-level water tank 3 communicates through moisturizing pipeline 7, be equipped with on the moisturizing pipeline 7 moisturizing electric valve 5, the export of high-level water tank 3 with circulating water feed pipe 6 communicates.
The demineralized water main pipe 4 is utilized to provide water pressure from the demineralized water pump, the demineralized water is conveyed to the high-level water tank 3, the water supplementing pump which is originally required to be installed on the water supplementing pipe 7 is saved, the influence of frequent start and stop of the water supplementing pump on the system safety is reduced, and the cost is saved. The automatic opening and closing function of the water supplementing valve 5 is utilized, so that the desalted water main pipe 4 is communicated with or disconnected from the high-level water tank 3, the automatic adjustment of the liquid level of the high-level water tank 3 is facilitated, the operation of personnel is reduced, and the overhaul work of a subsequent system is also reduced.
Specifically, as shown in fig. 1, water which enters the circulating water inlet pipe 6 and circulates through the flue gas cooler 1 and the heating medium water heater 2 is referred to as circulating water, and when the circulating water needs to be replenished, desalted water enters the circulating water inlet pipe 6 after passing through the high-level water tank 3. The circulating water enters the flue gas cooler 1 to exchange heat with the flue gas, then flows out to the heat medium water heater 2 to exchange heat with the air, thereby generating warm air, and enters the circulating water liquid inlet pipe 6 after the circulating water is cooled.
The flue gas cooler 1 may be a flue gas cooler in any system for generating flue gas, for example, it may be a primary flue gas cooler of a thermal power plant, or a secondary flue gas cooler for further cooling flue gas exhausted from the primary flue gas cooler.
In one specific embodiment, the flue gas cooler 1 is a secondary flue gas cooler, and after passing through the secondary flue gas cooler, the temperature of the flue gas is reduced from 146 ℃ to 113 ℃, and the temperature of circulating water is heated from 70 ℃ to 100 ℃.
On the basis of any scheme, the water supplementing bypass pipeline 8 and the bypass valve 9 are further included, two ends of the water supplementing bypass pipeline 8 are respectively communicated with the water supplementing pipeline 7 at two ends of the water supplementing valve 5, and the bypass valve 9 is arranged on the water supplementing bypass pipeline 8.
When the water replenishing valve 5 needs maintenance or the water replenishing pipeline 7 fails, the water replenishing bypass pipeline 8 can be utilized to replenish water to the high-level water tank 3 by opening the bypass valve 9.
Optionally, the bypass valve 9 is a manual valve or an electric valve. In one particular embodiment, the bypass valve 9 is a manual valve.
On the basis of any one of the above schemes, the hydraulic control system further comprises two protection valves 10, wherein the two protection valves 10 are respectively arranged on the water supplementing pipeline 7 at two ends of the water supplementing valve 5 and are positioned between two ends of the water supplementing bypass pipeline 8.
When the water supplementing valve 5 works normally, both protection valves 10 are opened. When the water supplementing electric valve 5 needs to be maintained, the two protection valves 10 are closed to protect the water supplementing electric valve 5, and the water flow is prevented from continuously impacting the water supplementing electric valve 5 to damage the water supplementing electric valve 5.
Optionally, the protection valve 10 is a manual valve or an electric valve. In one particular embodiment, the protection valve 10 is a manual valve.
On the basis of any one of the above schemes, the circulating water inlet pipe 6 is also provided with a circulating water pump 11.
The circulating water pump 11 provides power to enable desalted water to circulate in a loop formed by the flue gas cooler 1 and the heating medium water heater 2.
On the basis of any scheme, the liquid level of the high-level water tank 3 is controlled to be 300-600mm through the water supplementing valve 5.
Specifically, as shown in fig. 2, the device further comprises a controller and a liquid level sensor, wherein the liquid level sensor is used for detecting the liquid level of the high-level water tank 3, the controller is respectively in communication connection with the liquid level sensor and the water supplementing valve 5, the liquid level sensor transmits liquid level information to the controller, the controller controls the water supplementing valve 5 to be opened and closed according to the liquid level information, and the control mode can be realized by adopting the prior art. Specifically, when the liquid level of the high-level water tank 3 is lower than 300mm, the water supplementing valve 5 is opened; when the liquid level of the high-level water tank 3 is higher than 600mm, the water supplementing valve 5 is closed.
On the basis of any scheme, the water pressure of the desalted water main pipe 4 is more than or equal to 0.6MPa.
The water pressure of the desalted water main pipe 4 can output desalted water to the high-level water tank 3 positioned at a height of several tens meters.
In one specific embodiment, the water pressure of the desalted water main pipe 4 is 0.6MPa, and the head tank 3 is positioned at a position 47m high of the boiler room. According to the pressure of 1 meter of water column is 0.01MPa, the pressure of water column corresponding to 47 meters is 0.47MPa, and the pressure of the desalted water main pipe 4 is enough to ensure that the water supplementing work of the high-level water tank 3 is completed under the condition that no water supplementing pump is arranged.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.
Claims (8)
1. The utility model provides a flue gas waste heat utilization system, its characterized in that includes flue gas cooler (1), heat medium water heater (2), high-order water tank (3), demineralized water main pipe (4) and moisturizing electric valve (5), the liquid outlet of flue gas cooler (1) with the water inlet intercommunication of heat medium water heater (2), the delivery port of heat medium water heater (2) with the inlet of flue gas cooler (1) is through circulating water feed liquor pipe (6) intercommunication, demineralized water main pipe (4) are last to have the demineralized water pump, the export of demineralized water main pipe (4) with the import of high-order water tank (3) is through moisturizing pipeline (7) intercommunication, be equipped with on moisturizing pipeline (7) moisturizing electric valve (5), the export of high-order water tank (3) with circulating water feed liquor pipe (6) intercommunication.
2. The flue gas waste heat utilization system according to claim 1, further comprising a water supplementing bypass pipeline (8) and a bypass valve (9), wherein two ends of the water supplementing bypass pipeline (8) are respectively communicated with the water supplementing pipeline (7) at two ends of the water supplementing valve (5), and the bypass valve (9) is arranged on the water supplementing bypass pipeline (8).
3. A flue gas waste heat utilization system according to claim 2, wherein the bypass valve (9) is a manual valve.
4. A flue gas waste heat utilization system according to claim 2, further comprising two protection valves (10), wherein the two protection valves (10) are respectively arranged on the water replenishing pipe (7) at two ends of the water replenishing valve (5) and are positioned between two ends of the water replenishing bypass pipe (8).
5. A flue gas waste heat utilization system according to claim 4, wherein the protection valve (10) is a manual valve.
6. A flue gas waste heat utilization system according to any one of claims 1-5, wherein the circulating water inlet pipe (6) is further provided with a circulating water pump (11).
7. A flue gas waste heat utilization system according to any one of claims 1-5, wherein the liquid level of the head tank (3) is controlled to 300-600mm by the water replenishment valve (5).
8. A flue gas waste heat utilization system according to any one of claims 1 to 5, wherein the water pressure of the desalinated water main pipe (4) is greater than or equal to 0.6MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320306285.6U CN219264340U (en) | 2023-02-24 | 2023-02-24 | Flue gas waste heat utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320306285.6U CN219264340U (en) | 2023-02-24 | 2023-02-24 | Flue gas waste heat utilization system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219264340U true CN219264340U (en) | 2023-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320306285.6U Active CN219264340U (en) | 2023-02-24 | 2023-02-24 | Flue gas waste heat utilization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219264340U (en) |
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2023
- 2023-02-24 CN CN202320306285.6U patent/CN219264340U/en active Active
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