CN217032152U - Power station boiler waste heat recovery utilizes device - Google Patents
Power station boiler waste heat recovery utilizes device Download PDFInfo
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- CN217032152U CN217032152U CN202122728716.1U CN202122728716U CN217032152U CN 217032152 U CN217032152 U CN 217032152U CN 202122728716 U CN202122728716 U CN 202122728716U CN 217032152 U CN217032152 U CN 217032152U
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- heat
- heat exchanger
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- utilization unit
- input
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- 239000002918 waste heat Substances 0.000 title claims abstract description 32
- 238000011084 recovery Methods 0.000 title claims abstract description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000003546 flue gas Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000004064 recycling Methods 0.000 abstract description 20
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The utility model discloses a power station boiler waste heat recycling device, which comprises: a heat recovery unit and a heat utilization unit; the heat recovery unit comprises a first heat exchanger and a second heat exchanger, and the first heat exchanger, the second heat exchanger and the heat utilization unit are sequentially connected through pipelines filled with heat exchange media to form a closed loop circulation passage; the first heat exchanger is connected to a flue outlet of the boiler and is used for absorbing heat of flue gas discharged from the flue outlet; the second heat exchanger is connected to a fixed discharge outlet and a continuous discharge outlet of the boiler and is used for absorbing heat of liquid discharged from the fixed discharge outlet and the continuous discharge outlet; and the heat exchange medium output from the second heat exchanger heats the materials in the heat utilization unit and then flows into the first heat exchanger. The power station boiler waste heat recycling device provided by the utility model can recycle waste heat carried in steam and flue gas discharged by a boiler, and the utilization rate of heat is improved.
Description
Technical Field
The utility model relates to the technical field of energy conservation and emission reduction of thermal power plants, in particular to a power station boiler waste heat recycling device.
Background
At present, thermal power still occupies the leading position in the domestic electric power market, the loss caused by the flue gas discharged by a power station boiler accounts for 50% of the total loss of the boiler, the thermal power plant produces larger steam and flue gas discharge in the production process, the discharged flue gas and steam have a large amount of heat which is not fully utilized, the heat loss in the production process is very large, and how to recycle the part of heat becomes the problem which needs to be solved urgently at present.
SUMMERY OF THE UTILITY MODEL
The utility model provides a waste heat recycling device of a power station boiler, which aims to solve the problem that heat of the power station boiler is directly lost and not fully utilized.
In order to solve the above problems, the present invention provides the following technical solutions:
a power station boiler waste heat recycling device comprises a heat recycling unit and a heat utilization unit; the heat recovery unit comprises a first heat exchanger and a second heat exchanger, and the first heat exchanger, the second heat exchanger and the heat utilization unit are sequentially connected through pipelines filled with heat exchange media to form a closed-loop circulation passage.
The first heat exchanger is connected to a flue outlet of the boiler and used for absorbing heat of flue gas discharged from the flue outlet and heating a heat exchange medium.
The second heat exchanger is connected to a fixed discharge outlet and a continuous discharge outlet of the boiler and is used for absorbing heat of liquid discharged from the fixed discharge outlet and the continuous discharge outlet and heating a heat exchange medium.
The input end of the heat utilization unit is connected to the output end of the second heat exchanger, the output end of the heat utilization unit is connected to the input end of the first heat exchanger, and heat exchange medium output from the second heat exchanger heats materials in the heat utilization unit and then flows into the first heat exchanger.
Preferably, the utility boiler waste heat recycling device further comprises a third heat exchanger, the third heat exchanger is connected between the output end of the second heat exchanger and the input end of the heat utilization unit, the third heat exchanger is connected with an auxiliary heating pipeline, and the auxiliary heating pipeline is used for auxiliary heating of a heat exchange medium flowing through the third heat exchanger.
Preferably, in the power station boiler waste heat recycling device, the heat utilization unit comprises an evaporator and/or a fan heater.
Preferably, the power station boiler waste heat recycling device is provided with normally open valves at the input end and the output end of the first heat exchanger, at the input end and the output end of the second heat exchanger, at the input end and the output end of the third heat exchanger, and at the input end and the output end of the heat utilization unit, respectively, on the pipeline.
Preferably, in the device for recycling waste heat of a power station boiler, a first bypass is connected between an input end and an output end of the first heat exchanger, a second bypass is connected between an input end and an output end of the second heat exchanger, third bypasses are respectively connected between an input end and an output end of the third heat exchanger, and normally closed valves are arranged on the first bypass, the second bypass, and the third bypass. Preferably, the utility boiler waste heat recycling device, on the pipeline, be located be provided with the filter screen between the output of heat utilization unit and the input of first heat exchanger for impurity filtering prevents to block up, be provided with the water pump and be used for guaranteeing heat transfer medium directional flow.
Preferably, the utility boiler waste heat recycling device is provided with a fourth bypass between the output end of the heat utilization unit and the input end of the first heat exchanger, and the fourth bypass is provided with a filter screen and a water pump.
According to the waste heat recycling device provided by the utility model, the first heat exchanger and the second heat exchanger are respectively arranged on the flue outlet, the fixed discharge outlet and the continuous discharge outlet of the boiler, the first heat exchanger and the second heat exchanger are connected with the heat utilization unit to form a closed loop circulation path, and the first heat exchanger and the second heat exchanger are used for recycling the preheating in the flue gas and the preheating in the steam and are utilized on the heat utilization unit, so that the steam discharged by the boiler and the waste heat carried in the flue gas are recycled and reused, and the utilization rate of the heat is improved.
Drawings
FIG. 1 is a schematic structural diagram of a power station boiler waste heat recycling device provided by the utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, a detailed description of the present invention is provided below with reference to fig. 1.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the solution according to the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
The embodiment provides a power station boiler waste heat recycling device, as shown in fig. 1, the device comprises a heat recycling unit and a heat utilizing unit; the heat recovery unit comprises a first heat exchanger 1 and a second heat exchanger 2, and the first heat exchanger 1, the second heat exchanger 2 and the heat utilization unit are sequentially connected through a pipeline 3 filled with heat exchange media to form a closed loop circulation passage.
As shown in fig. 1, the first heat exchanger 1 is connected to a flue outlet 4 of the boiler, and is configured to absorb heat of flue gas discharged from the flue outlet 4, heat a heat exchange medium, and discharge the flue gas after heat absorption from an outlet 18.
As shown in fig. 1, the second heat exchanger 2 is connected to the fixed discharge port 5 and the continuous discharge port 6 of the boiler, and is configured to absorb heat of the liquid discharged from the fixed discharge port 5 and the continuous discharge port 6 to heat a heat transfer medium.
The input end of the heat utilization unit is connected to the output end of the second heat exchanger 2, the output end of the heat utilization unit is connected to the input end of the first heat exchanger 1, and the heat exchange medium output from the second heat exchanger 2 heats the material in the heat utilization unit and then flows into the first heat exchanger 1.
It should be noted that the heat exchange medium is usually water.
According to the waste heat recycling device, the first heat exchanger and the second heat exchanger are respectively arranged on the flue outlet, the fixed discharge outlet and the continuous discharge outlet of the boiler, and then the first heat exchanger and the second heat exchanger are connected with the heat utilization unit to form a closed-loop circulation passage, so that waste heat carried in steam and smoke discharged by the boiler is recycled, and the utilization rate of heat is improved.
In this embodiment, as a preferable scheme, as shown in fig. 1, the device for recycling waste heat of a power station boiler further includes a third heat exchanger 7, the third heat exchanger 7 is connected between the output end of the second heat exchanger 2 and the input end of the heat utilization unit, the third heat exchanger 7 is connected to an auxiliary heat pipeline 8, and the auxiliary heat pipeline 8 is used for auxiliary heating of a heat exchange medium flowing through the third heat exchanger 7. Through setting up third heat exchanger 7 and assisting hot pipeline 8, its effect is when power plant boiler just starts, and it is not high to discharge the waste heat, makes heat transfer medium have sufficient heat and heats the material of heat utilization unit this moment for the example, it is used for carrying out the auxiliary heating to the heat transfer medium who flows through third heat exchanger 7 to assist hot pipeline 8, ensures that each equipment can the steady operation.
In the present embodiment, as shown in fig. 1, the heat utilization unit preferably includes an evaporator 9 and a heater 10. When a heat medium is input into the evaporator 9, liquid ammonia 21 in the evaporator 9 absorbs heat of the heat medium and vaporizes the heat into ammonia 22, and the ammonia 22 is supplied to other required equipment, so that a heat utilization effect is achieved; one end of the air heater 10 is connected with the output end of the third heat exchanger 7, the other end of the air heater is connected with the input end of the first heat exchanger 1, when a heat medium is input into the air heater 10, cold air 23 in the air heater 10 absorbs heat and outputs hot air 24, and the hot air 24 is supplied to other required equipment, so that the heat utilization effect is achieved. In other embodiments, the heat utilization unit may be provided with only the evaporator 9 or the air heater 10.
In this embodiment, as a preferable scheme, as shown in fig. 1, the pipeline 3 is provided with normally open valves 11 respectively at the input end and the output end of the first heat exchanger 1, at the input end and the output end of the second heat exchanger 2, at the input end and the output end of the third heat exchanger 7, and at the input end and the output end of the heat utilization unit. Pneumatic valves 19 are respectively arranged on the pipeline of the fixed discharge port 5, the pipeline of the continuous discharge port 6 and the pipeline of the input ends of the evaporator 9 and the heater 10, and are used for ensuring the flowing direction of the heat medium.
In this embodiment, as shown in fig. 1, preferably, a first bypass 12 is connected between the input end and the output end of the first heat exchanger 1, a second bypass 13 is connected between the input end and the output end of the second heat exchanger 2, third bypasses 14 are respectively connected between the input end and the output end of the third heat exchanger 7, and normally closed valves 15 are respectively disposed on the first bypass 12, the second bypass 13, and the third bypasses 14. The first bypass 12, the second bypass 13 and the third bypass 14 are used for ensuring that other heat exchangers can normally operate when a single heat exchanger is damaged, and the operation of the whole waste heat recovery device is not influenced, so that the safety of the whole device is ensured.
In this embodiment, as shown in fig. 1, as a preferable scheme, a filter screen 16 is disposed on the pipeline 3 between the output end of the heat utilization unit and the input end of the first heat exchanger 1 to filter impurities and prevent blockage, and a water pump 17 is disposed to ensure a directional flow of a heat exchange medium. In a further preferred scheme, a fourth bypass 14a is arranged between the output end of the heat utilization unit and the input end of the first heat exchanger 1, a filter screen 16 and a water pump 17 are also arranged on the fourth bypass 14a, and the fourth bypass 14a is used as an alternative line.
According to the waste heat recycling device provided by the embodiment, the first heat exchanger and the second heat exchanger are respectively arranged on the flue outlet, the fixed discharge outlet and the continuous discharge outlet of the boiler, the first heat exchanger and the second heat exchanger are connected with the heat utilization unit to form a closed-loop circulation path, preheating in flue gas and preheating in steam are recycled through the first heat exchanger and the second heat exchanger, and are utilized on the heat utilization unit, so that the steam discharged by the boiler and waste heat carried in the flue gas are recycled, and the utilization rate of heat is improved.
The foregoing is directed to embodiments of the present invention, and it is understood that various modifications and adaptations of the utility model may occur to those skilled in the art without departing from the scope and spirit of the utility model.
The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.
Claims (7)
1. The utility model provides a power plant boiler waste heat recovery utilizes device which characterized in that, the device includes heat recovery unit and heat utilization unit; the heat recovery unit comprises a first heat exchanger (1) and a second heat exchanger (2), and the first heat exchanger (1), the second heat exchanger (2) and the heat utilization unit are sequentially connected through a pipeline (3) filled with heat exchange media to form a closed loop circulation passage;
the first heat exchanger (1) is connected to a flue outlet (4) of the boiler and is used for absorbing heat of flue gas discharged from the flue outlet (4) and heating a heat exchange medium;
the second heat exchanger (2) is connected to a fixed discharge outlet (5) and a continuous discharge outlet (6) of the boiler and is used for absorbing heat of liquid discharged from the fixed discharge outlet (5) and the continuous discharge outlet (6) and heating a heat exchange medium;
the input end of the heat utilization unit is connected to the output end of the second heat exchanger (2), the output end of the heat utilization unit is connected to the input end of the first heat exchanger (1), and the heat exchange medium output from the second heat exchanger (2) heats the materials in the heat utilization unit and then flows into the first heat exchanger (1).
2. The utility boiler waste heat recovery device according to claim 1, characterized in that the device further comprises a third heat exchanger (7), the third heat exchanger (7) is connected between the output of the second heat exchanger (2) and the input of the heat utilization unit, the third heat exchanger (7) is connected with an auxiliary heat pipe (8), and the auxiliary heat pipe (8) is used for auxiliary heating of the heat exchange medium flowing through the third heat exchanger (7).
3. The power plant boiler waste heat recovery device according to claim 1 or 2, characterized in that the heat utilization unit comprises an evaporator (9) and/or a fan heater (10).
4. The utility boiler waste heat recovery device according to claim 2, characterized in that the pipeline (3) is provided with normally open valves (11) at the input and output of the first heat exchanger (1), at the input and output of the second heat exchanger (2), at the input and output of the third heat exchanger (7) and at the input and output of the heat utilization unit, respectively.
5. The utility boiler waste heat recovery device according to claim 2, characterized in that a first bypass (12) is connected between the input and the output of the first heat exchanger (1), a second bypass (13) is connected between the input and the output of the second heat exchanger (2), and a third bypass (14) is connected between the input and the output of the third heat exchanger (7), and the first bypass (12), the second bypass (13) and the third bypass (14) are provided with normally closed valves (15).
6. The utility boiler waste heat recovery device according to claim 1, characterized in that a filter screen (16) and a water pump (17) are arranged on the pipeline (3) between the output of the heat utilization unit and the input of the first heat exchanger (1).
7. The utility boiler waste heat recovery and utilization device according to claim 6, characterized in that a fourth bypass (14a) is arranged between the output of the heat utilization unit and the input of the first heat exchanger (1), and a filter screen (16) and a water pump (17) are arranged on the fourth bypass (14 a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122728716.1U CN217032152U (en) | 2021-11-09 | 2021-11-09 | Power station boiler waste heat recovery utilizes device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122728716.1U CN217032152U (en) | 2021-11-09 | 2021-11-09 | Power station boiler waste heat recovery utilizes device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217032152U true CN217032152U (en) | 2022-07-22 |
Family
ID=82439246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122728716.1U Active CN217032152U (en) | 2021-11-09 | 2021-11-09 | Power station boiler waste heat recovery utilizes device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217032152U (en) |
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2021
- 2021-11-09 CN CN202122728716.1U patent/CN217032152U/en active Active
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