CN220038415U - Boiler blowdown waste heat recovery system - Google Patents
Boiler blowdown waste heat recovery system Download PDFInfo
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- CN220038415U CN220038415U CN202321472280.7U CN202321472280U CN220038415U CN 220038415 U CN220038415 U CN 220038415U CN 202321472280 U CN202321472280 U CN 202321472280U CN 220038415 U CN220038415 U CN 220038415U
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- blowdown
- boiler
- continuous
- heat exchanger
- waste heat
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- 239000002918 waste heat Substances 0.000 title claims abstract description 27
- 238000011084 recovery Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 21
- 230000000737 periodic effect Effects 0.000 claims abstract description 15
- 239000002699 waste material Substances 0.000 abstract description 4
- 239000010865 sewage Substances 0.000 description 30
- 238000010586 diagram Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The utility model discloses a boiler blowdown waste heat recovery system, which comprises a periodic blowdown expansion vessel, a blowdown cooling tank and a continuous blowdown expansion vessel, wherein the periodic blowdown expansion vessel comprises a fixed-row main pipe and a continuous-row drain pipe, the periodic blowdown expansion vessel is connected to the continuous blowdown expansion vessel through the continuous-row drain pipe, the periodic blowdown expansion vessel is connected to the blowdown cooling tank through the pipe, and the periodic blowdown expansion vessel further comprises a first heat exchanger, a second heat exchanger and a blower; the first heat exchanger is arranged on the fixed row main pipe and is connected with the air feeder; the second heat exchanger is arranged on the continuous drainage pipeline and is connected with the blower; the air outlet of the air feeder is connected to the boiler; air exchanges heat with the fixed discharge main pipe and the continuous discharge drain pipe respectively at the first heat exchanger and the second heat exchanger, absorbs the waste heat of the discharged water, and the air absorbing the waste heat enters the boiler through the blower to provide the air inlet temperature of the boiler, so that the waste heat of the discharged water is fully utilized, the steam quantity during secondary capacity expansion of the discharged water is reduced due to temperature reduction, and the waste of water resources is reduced.
Description
Technical Field
The utility model relates to a boiler blow-down waste heat recovery system.
Background
In the prior power system, petrochemical enterprises, ferrous metallurgy and other enterprises, the produced vapor with water in the production process is directly discharged after being expanded by a regular blowdown flash tank, the blowdown of the flash tank is drained into a cooling tank, and the vapor is discharged after being mixed with cold water for cooling, so that part of water resources and energy sources are wasted, and the thermal pollution and noise of the environment are also caused.
Disclosure of Invention
In view of the above-mentioned shortcomings of the existing steam sewage disposal device in terms of waste heat recovery, the utility model provides a boiler sewage disposal waste heat recovery system, which can achieve the effects of recovering waste heat, saving water resources and energy and reducing heat pollution.
In order to achieve the above purpose, the embodiment of the present utility model adopts the following technical scheme:
the boiler blowdown waste heat recovery system comprises a periodic blowdown flash tank, a blowdown cooling tank and a continuous blowdown flash tank, wherein the periodic blowdown flash tank comprises a fixed drain main pipe and a continuous drain pipe, the periodic blowdown flash tank is connected to the continuous blowdown flash tank through the continuous drain pipe, the periodic blowdown flash tank is connected to the blowdown cooling tank through a pipeline, and the periodic blowdown flash tank further comprises a first heat exchanger, a second heat exchanger and a blower; the first heat exchanger is arranged on the fixed row main pipe and is connected with the air feeder; the second heat exchanger is arranged on the continuous drainage pipeline and is connected with the blower; the air outlet of the air feeder is connected to the boiler; the air exchanges heat with the fixed-row main pipe and the continuous-row drain pipe respectively at the first heat exchanger and the second heat exchanger, absorbs the waste heat of the sewage, and the air absorbing the waste heat enters the boiler through the blower to provide the air inlet temperature of the boiler.
The blowdown cooling pond includes drain pipe and temperature reducing water pipe.
And a bypass valve is arranged on a pipeline between the regular blowdown flash tank and the blowdown cooling tank.
And a control valve group is arranged between the continuous drainage pipeline and the continuous sewage discharge expansion tank.
And the temperature reducing water pipe is provided with an adjusting valve group for adjusting the flow rate and the time period of the temperature reducing water.
The implementation of the utility model has the advantages that:
the heat exchangers are arranged on the main pipe of the regular blowdown flash tank and the continuous drain pipeline, so that air exchanges heat with the sewage in the pipeline, and hot air absorbing the waste heat of the sewage enters the boiler through the blower to provide air inlet temperature for the boiler; the heat carried by the sewage after heat exchange and cooling is reduced, the influence of heat pollution can be reduced, the temperature is correspondingly reduced, the steam quantity is reduced during secondary capacity expansion, the waste of water resources is reduced, and the energy utilization rate of the boiler can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, 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 these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a prior art boiler blow down system;
fig. 2 is a schematic structural diagram of a boiler blow-down waste heat recovery system according to the present utility model.
Legend description: 1. a regular blowdown flash tank; 11. a fixed row of main pipes; 12. a drainage pipeline connected with the water outlet pipe; 13. a first heat exchanger; 14. a second heat exchanger; 15. a blower; 16. a bypass valve; 2. a sewage discharge cooling pool; 21. a drain pipe; 22. a temperature reducing water pipe; 221. a regulating valve group; 3. a continuous blowdown flash tank; 31. a control valve group; 4. a boiler.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. 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.
As shown in fig. 1, which is a schematic structural diagram of the existing boiler blow-down system, when the sewage enters the regular blow-down expansion vessel (labeled a) through the fixed-row main pipe (labeled a 1) and enters the continuous blow-down expansion vessel (labeled b) from the regular blow-down expansion vessel through the continuous-row drain pipe (labeled a 2), the sewage is cooled and discharged after being discharged into the blow-down cooling tank (labeled c), so that part of water resources and energy are wasted, and the environmental thermal pollution and noise are also caused.
As shown in fig. 2, the waste heat recovery system for the sewage of the boiler 4 comprises a regular sewage draining expansion tank 1, a sewage draining cooling pond 2 and a continuous sewage draining expansion tank 3, wherein the regular sewage draining expansion tank 1 comprises a fixed drain pipe 11 and a continuous drain pipe 12, the regular sewage draining expansion tank 1 is connected to the continuous sewage draining expansion tank 3 through the continuous drain pipe 12, the regular sewage draining expansion tank 1 is connected to the sewage draining cooling pond 2 through a pipeline, and the regular sewage draining expansion tank 1 further comprises a first heat exchanger 13, a second heat exchanger 14 and a blower 15; the first heat exchanger 13 is arranged on the fixed row main pipe 11 and is connected with the air blower 15; the second heat exchanger 14 is arranged on the drainage pipeline 12 and is connected with the blower 15; the air outlet of the blower 15 is connected to the boiler 4; the air exchanges heat with the fixed discharge main pipe 11 and the continuous discharge drain pipe 21 respectively at the first heat exchanger 13 and the second heat exchanger 14, absorbs the waste heat of the discharged water, and the air absorbing the waste heat enters the boiler 4 through the blower 15 to provide the air inlet temperature of the boiler 4;
in practical application, in order to utilize the waste heat in the sewage, a first heat exchanger 13 is arranged on an inlet pipeline (namely a fixed-discharge main pipe 11) of the periodic sewage discharge expansion vessel 1, and a second heat exchanger 14 is arranged on a continuous-discharge pipeline 12 of the periodic sewage discharge expansion vessel 1, so that the waste heat of the sewage in the air absorption pipeline is changed into hot air; wherein the first heat exchanger 13 and the second heat exchanger 14 are connected to a blower 15, the blower 15 is connected to the boiler 4, and hot air absorbing waste heat of the discharged sewage enters the boiler 4 to provide air inlet temperature of the boiler 4; the heat carried by the sewage after heat exchange is reduced, so that the heat pollution to the environment can be reduced, the temperature of the sewage is correspondingly reduced, the secondary capacity expansion steam quantity is reduced, and the water resource waste is reduced.
The blowdown cooling pond 2 includes drain pipe 21 and cooling water pipe 22.
And a bypass valve 16 is arranged on a pipeline between the periodic blowdown flash tank 1 and the blowdown cooling tank 2 and is used for adjusting the blowdown water flow rate of the periodic blowdown flash tank 1 entering the blowdown cooling tank 2.
A control valve group 31 is arranged between the continuous drainage pipeline 12 and the continuous blowdown flash tank 3, and the control valve group 31 is used for adjusting and controlling the flow rate and the on-off of the continuous drainage pipeline 12.
The temperature reducing water pipe 22 is provided with an adjusting valve group 221 for adjusting the flow rate and the time period of the temperature reducing water.
The implementation of the utility model has the advantages that:
the heat exchangers are arranged on the main pipe of the regular blowdown flash tank and the continuous drain pipeline, so that air exchanges heat with the sewage in the pipeline, and hot air absorbing the waste heat of the sewage enters the boiler through the blower to provide air inlet temperature for the boiler; the heat carried by the sewage after heat exchange and cooling is reduced, the influence of heat pollution can be reduced, the temperature is correspondingly reduced, the steam quantity is reduced during secondary capacity expansion, the waste of water resources is reduced, and the energy utilization rate of the boiler can be improved.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present utility model should be included in the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims (5)
1. The utility model provides a boiler (4) blowdown waste heat recovery system, includes regular blowdown expander (1), blowdown cooling tank (2), continuous blowdown expander (3) and boiler (4), regular blowdown expander (1) is including fixed row parent tube (11), even row drain pipe (12), regular blowdown expander (1) are connected to continuous blowdown expander (3) through even row drain pipe (12), regular blowdown expander (1) are connected to blowdown cooling tank (2) through the pipeline, a serial communication port, regular blowdown expander (1) still includes first heat exchanger (13), second heat exchanger (14) and forced draught blower (15); the first heat exchanger (13) is arranged on the fixed row of main pipes (11) and is connected with the air feeder (15); the second heat exchanger (14) is arranged on the drainage pipeline (12) and is connected with the blower (15); the air outlet of the air feeder (15) is connected to the boiler (4).
2. The boiler (4) blowdown waste heat recovery system of claim 1, wherein the blowdown cooling tank (2) includes a drain pipe (21) and a desuperheating pipe (22).
3. The boiler (4) blowdown waste heat recovery system of claim 1, wherein a bypass valve (16) is provided on the conduit between the periodic blowdown flash vessel (1) and blowdown cooling tank (2).
4. The boiler (4) blowdown waste heat recovery system of claim 1, wherein a control valve group (31) is provided between the continuous blowdown piping (12) and the continuous blowdown flash vessel (3).
5. The boiler (4) blowdown waste heat recovery system according to claim 2, characterized in that the attemperation water pipe (22) is provided with an adjusting valve group (221).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321472280.7U CN220038415U (en) | 2023-06-11 | 2023-06-11 | Boiler blowdown waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321472280.7U CN220038415U (en) | 2023-06-11 | 2023-06-11 | Boiler blowdown waste heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220038415U true CN220038415U (en) | 2023-11-17 |
Family
ID=88736979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321472280.7U Active CN220038415U (en) | 2023-06-11 | 2023-06-11 | Boiler blowdown waste heat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220038415U (en) |
-
2023
- 2023-06-11 CN CN202321472280.7U patent/CN220038415U/en active Active
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