CN218480591U - Waste heat recovery comprehensive utilization system - Google Patents
Waste heat recovery comprehensive utilization system Download PDFInfo
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- CN218480591U CN218480591U CN202222947487.7U CN202222947487U CN218480591U CN 218480591 U CN218480591 U CN 218480591U CN 202222947487 U CN202222947487 U CN 202222947487U CN 218480591 U CN218480591 U CN 218480591U
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Abstract
The utility model discloses a waste heat recovery utilizes system multipurposely, by main heat exchanger, the economizer, catch water, the recirculating pump, the recirculation pipe, refrigerating unit, high temperature water equipment, medium temperature water equipment, low temperature water equipment and cooler, the cooling tower, supporting auxiliary facilities such as recirculated cooling water pump constitute, a waste heat recovery utilizes system multipurposely, this system is through the gaseous waste heat that absorption technology discharged, output steam, high temperature hot water, medium temperature hot water and low temperature water are used for satisfying the needs of site work craft simultaneously, accomplish the highest with waste heat recovery efficiency simultaneously.
Description
Technical Field
The utility model relates to a waste heat recovery field, concretely relates to waste heat recovery comprehensive utilization system.
Background
At present, most of processes for discharging waste gas with a certain temperature in chemical industry and the like at home and abroad select a cooling tower to discharge the heat of the discharged waste gas into the atmosphere, so that not only energy loss is caused, but also atmospheric thermal pollution and evaporation loss of circulating cooling water are caused, and the processes widely exist in the production processes of chemical industry, oil refining, coking, cement, steel, environmental protection incineration and the like, and cause great middle-low grade energy, water loss and environmental pollution.
Although some waste heat recovery integrated utilization systems are also disclosed in the prior art together, for example: a boiler low-temperature flue gas waste heat comprehensive utilization and white removal system is disclosed in a patent CN 114719656; in patent CN114459252A, a comprehensive utilization process of flue gas waste heat of a roasting furnace and a flue gas treatment device are disclosed; patent CN216115497U discloses a cooling tower waste heat comprehensive utilization device, but these systems all have the problem of single function.
SUMMERY OF THE UTILITY MODEL
To the not enough of prior art existence, in order to adapt to the demand to many occasions, multi-parameter etc. in the actual production process, the utility model discloses a can produce steam and different temperature's hot water simultaneously, in addition, can also provide cold water for production technology except can providing steam and hot water for production technology, and have higher waste heat recovery efficiency.
The utility model aims at providing a waste heat recovery utilizes system multipurposely.
In order to achieve the above purpose, the present invention is implemented by the following technical solutions:
a waste heat recovery comprehensive utilization system comprises a main heat exchanger, an economizer and a steam-water separator;
the heat of the high-temperature waste gas is recovered through the main heat exchanger and the economizer and then enters a waste gas recovery cooler, and the heat of the recovered waste gas is used for producing steam, high-temperature hot water and medium-temperature hot water;
the demineralized water used for generating steam and high-medium temperature water is sequentially sent into an economizer, a main heat exchanger and a steam-water separator by a water feed pump, the steam-water separator is used for separating the steam from the water, and the steam is sent to steam using equipment; the desalted water is directly sent to the water equipment for medium and low temperature water through a water feeding pump and an economizer;
and the desalted water is directly sent to high-temperature water utilization equipment through a water feeding pump, an economizer and a main heat exchanger.
As a further technical scheme, water of the steam-water separator enters the main heat exchanger through a recirculation pipe through natural circulation or through a forced circulation of the recirculation pump and a path different from that of water from the economizer to complete circulation heating in the main heat exchanger to generate a steam-water mixture, and then enters the steam-water separator again to complete circulation of producing steam.
As a further technical scheme, the amount of the recycled water is automatically adjusted according to the water level of the steam-water separator and the steam pressure.
As a further technical scheme, the main heat exchanger is also connected with a hot water refrigerating machine and used for preparing cold water, and the hot water prepared with the cold water enters the main heat exchanger again to complete heat recovery circulation.
As a further technical scheme, the cooler is matched with a circulating cooling water system, and the cooling water system is also connected with the hot water refrigerator.
As a further technical scheme, the circulating cooling water system comprises a cooling tower, a first circulating cooling water pump and a second circulating cooling water pump; the cooling tower is connected with the hot water refrigerating unit through a first circulating cooling water pump, and the cooling tower is connected with the cooler through a second circulating cooling water pump.
As a further technical scheme, a connection port of the main heat exchanger and the economizer is arranged at the bottom of the main heat exchanger; and the recirculation pipe joint connected with the steam-water separator is arranged at the middle lower part of the main heat exchanger according to the calculation of the heat exchange quantity.
As a further technical scheme, the recycling pipeline is provided with a bypass system with a recycling pump, the recycling pump is started and stopped according to the change and the requirement of load, and the recycling pipeline runs by utilizing natural circulation power when the working condition is stable.
As a further technical scheme, the high-temperature water equipment is also connected with the main heat exchanger through a water return pipeline, and a forced circulation pump is installed on the water return pipeline.
As a further technical scheme, a water supply automatic regulating valve is also arranged on a loop connecting the main heat exchanger and the economizer.
Above-mentioned the utility model discloses an embodiment's beneficial effect as follows:
the utility model discloses a main heat exchanger, the economizer, catch water, the recycle pump has made up into recovery and steam production process to discharging the waste gas heat, except supplying the steam of certain pressure, the system can supply the high temperature hot water more than 90 ℃ and the moderate temperature hot water about 60 ℃ according to the on-the-spot technology needs, can also supply 7 ℃ of cold water through hot water refrigerating unit, such comprehensive utilization technology except can satisfying different technological demands, step heat utilization can accomplish the highest with heat recovery system's heat recovery efficiency, waste heat recovery system's economic benefits and environmental protection benefit have been increased, be the most efficient comprehensive energy-concerving and environment-protective device combined system among the present waste heat recovery comprehensive utilization technical field.
After the system realizes deep waste heat recovery of the discharged waste gas, the temperature of the finally discharged waste gas is reduced to the minimum on the premise of not consuming energy, a good foundation is laid for the subsequent waste gas recovery treatment or utilization process, and the treatment or recovery cost of the process waste gas is reduced.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
FIG. 1 is a system layout diagram of a waste heat recovery and comprehensive utilization system;
in the figure: 1. a main heat exchanger 2, a coal economizer 3 and a steam-water separator; 4. a recirculating water pump; 5. a demineralized water tank 6, a water feeding pump 7, a hot water refrigerating unit 8, a cooler 9, a cooling tower 10, a circulating cooling water pump 11, high-temperature water using equipment 12, medium-low temperature water using equipment 13, steam using equipment 14 and a forced circulation pump; 15. automatic regulating valve for water supply.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
just as the background art introduces, exist not enough among the prior art, in order to solve above technical problem, the utility model provides a waste heat recovery utilizes system multipurposely.
In a typical embodiment of the present invention, as shown in fig. 1, the waste heat recovery and comprehensive utilization system disclosed in this embodiment mainly comprises a steam production system, a hot water supply and refrigeration system, and the main devices include a main heat exchanger 1, an economizer 2, a steam-water separator 3, a recirculation water pump 4, a recirculation pipe, a hot water refrigeration unit 7, a cooler 8, a cooling tower 9, a recirculation cooling water pump 10, and a water feed pump 6;
after the heat of the waste gas discharged from the process equipment is recovered through the main heat exchanger 1 and the economizer 2, a waste gas recovery cooler can be additionally arranged according to the treatment and recovery requirements of the discharged waste gas, and the waste gas is further cooled to the recovery temperature requirement and then recovered or treated; the heat of the recovered waste gas can be used for producing steam, high-temperature hot water and medium-temperature hot water according to the requirements of the site: demineralized water from a water tank is sent into an economizer 2, a main heat exchanger 1 and a steam-water separator 3 by a water feed pump 6, the steam-water separator 3 is used for separating steam from water, and the generated steam is sent into a steam using device 13; the desalted water from the water tank is directly sent to the water equipment 12 for medium and low temperature water through the coal economizer 2 without passing through a steam-water separator; the desalted water from the water tank is directly sent to the high-temperature water using equipment 11 through the economizer 2 and the main heat exchanger 1 without passing through a steam-water separator.
Furthermore, the natural circulation or forced circulation can be automatically and manually selected according to the temperature and the quantity of the waste heat discharged by the waste gas to adapt to the change of the heat load, and the waste heat can be recovered to the maximum extent, namely, the water of the steam-water separator can be naturally circulated through a recirculation pipe or forcibly circulated through a circulation pump to increase the heat exchange efficiency.
Furthermore, when water from the steam-water separator through the recycling pipe and water from the economizer 2 enter the main heat exchanger through different paths due to different temperatures to complete circulation heating to generate a steam-water mixture and then enter the steam-water separator again to complete circulation for producing steam, the design optimizes the heat exchange flow of the water system, improves the heat exchange efficiency, and meanwhile, the recycling water quantity can be automatically adjusted according to the water level of the steam-water separator and the steam pressure.
Furthermore, when the on-site process needs hot water, the hot water is led out from a hot water outlet of the main heat exchanger 1 and a hot water outlet of the economizer 2 according to the required water temperature, so that medium-temperature water from the economizer 2 can be supplied, high-temperature water from a water outlet of the main heat exchanger 1 can also be supplied, and high-temperature water and low-temperature water can be mixed and then supplied according to the temperature requirement.
Further, when cold water with the temperature of 7 ℃ is needed on site, hot water with the temperature of about 100 ℃ provided by the main heat exchanger 1 is prepared by the hot water refrigerating unit 7, the hot water after the cold water is prepared can be reduced to 60 ℃, and the hot water enters the waste heat recovery system again to complete heat recovery circulation.
Furthermore, the connecting port of the main heat exchanger 1 and the economizer 2 is arranged at the bottom of the main heat exchanger 1, the recycling pipe connecting port from the steam-water separator 3 is arranged at the middle lower part of the main heat exchanger 1 according to the heat exchange amount calculation, a bypass system with a recycling pump is designed on a recycling pipeline, the starting and stopping of the recycling pump can be operated according to the change and the requirement of load, and the natural circulation power is utilized to operate when the working condition is stable.
Furthermore, a cooler 8 is designed behind the economizer and used for further cooling during waste gas treatment or recovery, the cooler 8 is matched with a circulating cooling water system, the cooling water system is shared with a hot water refrigerating unit, and the circulating cooling water system comprises a cooling tower 9, a first circulating cooling water pump 10 and a second circulating cooling water pump 10; the cooling tower 9 is connected with the hot water refrigerating unit 7 through a first circulating cooling water pump 10, and the cooling tower 9 is connected with the cooler 9 through a second circulating cooling water pump 10.
In order to ensure the heat exchange efficiency when the system supplies high-temperature hot water and adopts the high-temperature hot water as power for refrigeration, a forced circulation pump 14 is designed on a water return pipeline for recycling the high-temperature water, and the heat exchange quantity of the main heat exchanger can be flexibly adjusted according to the requirement of the hot water so as to meet the requirement of equipment.
The main heat exchanger 1, the economizer 2, the steam-water separator 3 and the recirculation pump 4 are combined to form a recovery process and a steam production process for the heat of the discharged waste gas, besides supplying steam with certain pressure, the system can supply high-temperature hot water with the temperature of more than 90 ℃ and medium-temperature hot water with the temperature of about 60 ℃ according to the field process requirements, and can also supply cold water with the temperature of 7 ℃ through a hot water refrigerating unit. After the system realizes deep waste heat recovery of the discharged waste gas, the temperature of the finally discharged waste gas is reduced to the minimum on the premise of not consuming energy, a good foundation is laid for the subsequent waste gas recovery treatment or utilization process, and the treatment or recovery cost of the process waste gas is reduced.
The specific implementation process is as follows:
and arranging an economizer, a main heat exchanger, a cooler, a water chilling unit and a forced circulation pump according to the exhaust temperature, the water temperature of the demineralized water tank, the steam and the demand of high and medium temperature water by combining with the field space design. The design accords with the installation basis and the structure of relevant standard, and equipment such as each heat exchanger is installed according to the combination in proper order of flue gas treatment process, for the heat exchange efficiency who improves the system, the flow direction of heat-absorbing medium is in principle mutually countercurrent with the waste gas flow direction of discharging. The equipment capacity and the pipeline size of a water pump, a water tank, a heat exchanger and a refrigerating unit of the system are designed according to the heat which can be absorbed by the system, and the system is installed and arranged on site according to the system design. The compiling system automatically controls files, and the control system is manufactured, installed and debugged.
Finally, it is also noted that relational terms such as first and second, and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A waste heat recovery comprehensive utilization system is characterized by comprising a main heat exchanger, an economizer and a steam-water separator;
the heat of the high-temperature waste gas is recovered through the main heat exchanger and the economizer and then enters a waste gas recovery cooler, and the heat of the recovered waste gas is used for producing steam, high-temperature hot water and medium-temperature hot water;
the demineralized water used for generating steam and high-medium temperature water is sequentially sent into a coal economizer, a main heat exchanger and a steam-water separator by a water feed pump, the steam and the water are separated in the steam-water separator, and the steam is sent to steam using equipment;
the desalted water is directly sent to the water equipment for medium and low temperature water through a water feeding pump and an economizer;
and the desalted water is directly sent to high-temperature water utilization equipment through a water feeding pump, an economizer and a main heat exchanger.
2. The waste heat recovery and comprehensive utilization system of claim 1, wherein water from the steam-water separator enters the main heat exchanger through a recirculation pipe, a recirculation pump and a water-saving device in different paths to complete circulation heating to generate a steam-water mixture, and then enters the steam-water separator again to complete circulation of steam production.
3. The comprehensive waste heat recovery and utilization system of claim 2, wherein the amount of recycled water is automatically adjusted according to the steam-water separator water level and the steam pressure.
4. The comprehensive utilization system for recovering waste heat according to claim 1, wherein the main heat exchanger is further connected with a hot water refrigerator for preparing cold water, and the hot water after preparing the cold water enters the main heat exchanger again to complete the heat recovery cycle.
5. The waste heat recovery and comprehensive utilization system as claimed in claim 4, wherein the cooler is provided with a circulating cooling water system, and the cooling water system is further connected with the hot water refrigerator.
6. The waste heat recovery and comprehensive utilization system as claimed in claim 5, wherein the circulating cooling water system comprises a cooling tower, a first circulating cooling water pump and a second circulating cooling water pump; the cooling tower is connected with the hot water refrigerating unit through a first circulating cooling water pump, and the cooling tower is connected with the cooler through a second circulating cooling water pump.
7. The waste heat recovery and comprehensive utilization system as claimed in claim 1, wherein a connection port of the main heat exchanger and the economizer is arranged at the bottom of the main heat exchanger; and the recycling pipe joint connected with the steam-water separator is arranged at the middle lower part of the main heat exchanger according to the heat exchange amount calculation.
8. The comprehensive waste heat recovery and utilization system of claim 1, wherein the recirculation pipeline is designed with a bypass system with a recirculation pump, the start and stop of the recirculation pump will be operated according to the change and need of the load, and the system operates by using natural circulation power when the working condition is stable.
9. The comprehensive utilization system for recovering waste heat according to claim 1, wherein the high-temperature water-using device is further connected with the main heat exchanger through a water return pipe, and a forced circulation pump is installed on the water return pipe.
10. The waste heat recovery and comprehensive utilization system as claimed in claim 1, wherein a water supply automatic regulating valve is further arranged on a loop connecting the main heat exchanger and the economizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222947487.7U CN218480591U (en) | 2022-11-03 | 2022-11-03 | Waste heat recovery comprehensive utilization system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222947487.7U CN218480591U (en) | 2022-11-03 | 2022-11-03 | Waste heat recovery comprehensive utilization system |
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| CN218480591U true CN218480591U (en) | 2023-02-14 |
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| CN202222947487.7U Active CN218480591U (en) | 2022-11-03 | 2022-11-03 | Waste heat recovery comprehensive utilization system |
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