CN217584394U - Energy-saving system of boiler blow-down flash tank - Google Patents
Energy-saving system of boiler blow-down flash tank Download PDFInfo
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- CN217584394U CN217584394U CN202221343752.4U CN202221343752U CN217584394U CN 217584394 U CN217584394 U CN 217584394U CN 202221343752 U CN202221343752 U CN 202221343752U CN 217584394 U CN217584394 U CN 217584394U
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Abstract
The utility model discloses a boiler blowdown flash tank economizer system, include: a demineralized water tank; the low-pressure steam pocket is also used as a deaerator; the device further comprises an economizer, the economizer is connected with the demineralized water tank and used for receiving demineralized water from the demineralized water tank, the economizer is connected with the low-pressure steam drum and the deaerator and used for discharging the demineralized water, the low-pressure steam drum and the deaerator are connected, the deaerator is used for discharging the demineralized water, sewage from the low-pressure steam drum and the deaerator is received, the economizer is connected with the medium-pressure steam drum and used for receiving sewage from the medium-pressure steam drum, the economizer is connected with the blowdown flash tank and used for discharging the sewage from the low-pressure steam drum and the deaerator and the sewage from the medium-pressure steam drum. The device is used for recycling the waste heat, so that the energy waste is reduced, the damage to the environment is reduced, and the economy and the reliability are improved.
Description
Technical Field
The utility model relates to a boiler waste heat recovery system, especially boiler blowdown flash tank economizer system.
Background
In a boiler system, after the feed water entering a steam drum is subjected to measures such as filtering, softening, deoxidization and the like, the water quality meets the specified requirements. However, in the steam drum, impurities are rarely taken away by steam, the salt content of the boiler water exceeds the standard along with the continuous concentration of the boiler water, and the boiler water needs to be subjected to pollution discharge treatment in order to ensure the normal operation of the boiler. The sewage is discharged in two modes of continuous sewage discharge and periodic sewage discharge, the furnace water with high salt concentration on the evaporation surface of the steam drum is discharged in the continuous sewage discharge mode, and insoluble sediments precipitated at the bottom of the boiler are discharged in the periodic sewage discharge mode. The boiler pollution discharge rate is usually 2% -5%, which is one of the main reasons for working medium loss.
At present, boiler blow-off water is usually directly discharged into a blow-off flash tank, and in the blow-off flash tank, because of pressure reduction, the flash evaporation phenomenon can appear in saturated blow-off water, and the steam of production is discharged into the atmosphere through blow-off flash tank top, because the temperature is higher, can generate a large amount of white steam when discharging into the atmosphere, and produce great noise. And discharging the sewage after pressure reduction to a sewage cooling well through the bottom of the sewage flash tank for treatment. The pollution discharge treatment method not only has the defects that more heat is not recycled, the energy is wasted, but also pollutes the surrounding environment.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above problems and providing an energy-saving system of a boiler blow-down flash tank, which can recover the redundant energy and protect the surrounding environment.
In order to realize the purpose, the utility model adopts the following technical scheme:
a boiler blow down flash tank economizer system, the apparatus comprising: a demineralized water tank; the low-pressure steam pocket is also used as a deaerator; medium pressure steam pocket and blowdown flash tank, its characterized in that still includes the economizer, the economizer with the demineralized water tank is connected and is used for receiving the demineralized water that comes from the demineralized water tank, the economizer with low pressure steam pocket holds concurrently the oxygen-eliminating device and connects, be used for with the demineralized water discharges low pressure steam pocket holds concurrently the oxygen-eliminating device, and receive and come from the sewage of low pressure steam pocket hold concurrently the oxygen-eliminating device, the economizer with the medium pressure steam pocket is connected, is used for receiving and comes from the sewage of medium pressure steam pocket, the economizer with the blowdown flash tank is connected, is used for coming from the sewage of low pressure steam pocket hold concurrently the oxygen-eliminating device and coming from the sewage of medium pressure steam pocket discharges the blowdown flash tank.
Preferably, the economizer is a shell-and-tube heat exchanger and is used for simultaneously cooling the sewage of the low-pressure steam drum and the deaerator and the sewage of the medium-pressure steam drum and heating the desalted water.
Preferably, the blowdown flash tank is connected to a blowdown cooling well.
Preferably, a deoxygenated water feeding pump and an electric regulating valve are arranged in a pipeline of the demineralized water tank connected to the economizer.
Preferably, the economizer is connected with the low-pressure steam drum and deaerator through a low-pressure economizer and is used for discharging the demineralized water to the low-pressure steam drum and deaerator.
Preferably, the energy saver is connected with the low-pressure drum and deaerator through a low-pressure drum blow-off pipe and is used for receiving sewage from the low-pressure drum and deaerator.
Preferably, the economizer is connected to the intermediate pressure drum via an intermediate pressure drum drain for receiving effluent from the intermediate pressure drum.
The utility model discloses following beneficial effect has:
(1) The energy saver is used for cooling sewage of the low-pressure boiler and the medium-pressure boiler and heating demineralized water, so that heat can be recycled, and the energy-saving effect is achieved.
(2) After the boiler sewage is subjected to cooling treatment by the economizer, the flash evaporation phenomenon of the boiler blow-down flash tank is greatly reduced, the generation amount of white mist at the top end exhaust port is reduced, and the environmental pollution is small.
(3) The device has simple integral structure and is economic and reliable.
Drawings
FIG. 1 is a schematic diagram of a boiler blow-down flash tank economizer system.
Detailed Description
In order to make the technical means, creation characteristics, achievement purpose and efficacy of the utility model easy to understand and understand, the utility model is further explained by combining with the specific figure below.
As shown in fig. 1, the utility model relates to a boiler blowdown flash tank economizer system, include: a demineralized water tank 1, a low-pressure steam pocket and deaerator 3, a medium-pressure steam pocket 4, a pollution discharge flash tank 8 and an energy saver 2.
The economizer 2 is connected with the demineralized water tank 1 through a pipeline, and the demineralized water in the demineralized water tank 1 enters the economizer 2 through a deoxygenation water feed pump 10 and an electric regulating valve 11 in the pipeline.
The economizer 2 is connected with the low-pressure drum and deaerator 3 through the low-pressure economizer 5, and the demineralized water is discharged to the low-pressure drum and deaerator 3. And the energy saver 2 is connected with the low-pressure drum and deaerator 3 through a low-pressure drum blow-off pipe 6 and receives sewage from the low-pressure drum and deaerator 3. The economizer 2 is further connected to the medium pressure drum 4 via a medium pressure drum drain 7 for receiving sewage from the medium pressure drum 4.
The economizer 2 is also connected with a blowdown flash tank 8, and is used for discharging sewage from the low-pressure steam drum and deaerator 3 and from the medium-pressure steam drum 4 to the blowdown flash tank, and the blowdown flash tank 8 is connected to a blowdown cooling well 9.
In this embodiment, the economizer 2 is a shell-and-tube heat exchanger, and is configured to cool down the sewage of the low-pressure drum and deaerator 3 and the sewage of the medium-pressure drum 4 at the same time, and heat the demineralized water.
The utility model discloses a theory of operation lies in:
the boiler sewage is discharged from the medium-pressure steam drum 4 and the low-pressure steam drum 3 which are also used as deaerators, and enters the same economizer 2 for heat exchange. And the sewage after temperature reduction is discharged into a sewage discharge flash tank 8 for pressure reduction, the generated steam is discharged into the atmosphere from the top of the sewage discharge flash tank 8, and the sewage is discharged into a sewage discharge cooling well 9 from the bottom for subsequent treatment. Demineralized water gets into electrical control valve 11 after passing through deoxidization feed pump 10 pressurization, carries out flow and pressure control, later gets into economizer 2 and carries out once heating, and rethread low-pressure economizer 5 carries out the secondary heating, and demineralized water after the secondary heating flows into low pressure steam pocket and oxygen-eliminating device 3 concurrently, carries out the deoxidization.
Because the energy saver 2 is used for cooling the sewage of the low-pressure boiler and the medium-pressure boiler and heating the demineralized water, the heat can be recycled. Moreover, after the boiler sewage in the blowdown flash tank 8 is cooled by the economizer, the flash evaporation phenomenon is greatly reduced, and the generation amount of white mist at the top exhaust port is reduced.
It is above only that the utility model discloses a preferred embodiment, the utility model discloses a scope of protection is not limited to above-mentioned embodiment only, everywhere belongs to the utility model discloses a technical scheme of principle all belongs to the utility model discloses a scope of protection. For those skilled in the art, several modifications can be made without departing from the principle of the present invention, and such modifications should also be considered as the protection scope of the present invention.
Claims (7)
1. A boiler blow down flash tank economizer system, the apparatus comprising:
a demineralized water tank (1);
the low-pressure steam pocket is also used as a deaerator (3);
an intermediate-pressure steam drum (4) and
a pollution discharge flash tank (8),
characterized in that the device also comprises an energy saver (2),
the economizer (2) is connected with the demineralized water tank (1) and is used for receiving the demineralized water from the demineralized water tank (1),
the energy saver (2) is connected with the low-pressure steam pocket and deaerator (3) and is used for discharging the desalted water to the low-pressure steam pocket and deaerator (3) and receiving the sewage from the low-pressure steam pocket and deaerator (3),
the economizer (2) is connected with the medium-pressure steam drum (4) and is used for receiving sewage from the medium-pressure steam drum (4),
the energy saver (2) is connected with the sewage discharge flash tank (8) and is used for discharging sewage from the low-pressure steam drum and deaerator (3) and sewage from the medium-pressure steam drum (4) to the sewage discharge flash tank (8).
2. The energy saving system of the boiler blow-down flash tank of claim 1, wherein the economizer is a shell and tube heat exchanger for simultaneously cooling down the sewage of the low pressure drum and deaerator (3) and the sewage of the medium pressure drum (4) and heating the demineralized water.
3. The boiler blow down flash economizer system of claim 1 wherein the blow down flash (8) is connected to a blow down cooling well (9).
4. The energy saving system of the boiler blow-down flash tank of claim 1, characterized in that a deoxygenated feed pump (10) and an electric regulating valve (11) are arranged in the pipe connecting the demineralized water tank (1) to the economizer (2).
5. The boiler blow down flash tank economizer system of claim 1 wherein the economizer (2) is connected to the low pressure drum and deaerator (3) via a low pressure economizer (5) for discharging the demineralized water to the low pressure drum and deaerator (3).
6. The energy saving system of a boiler blowdown flash tank of claim 1, wherein the economizer (2) is connected with the low pressure drum and oxygen scavenger (3) via a low pressure drum blowdown pipe (6) for receiving the sewage from the low pressure drum and oxygen scavenger (3).
7. A boiler blow down flash tank economizer system according to claim 1, characterized in that the economizer (2) is connected to the intermediate pressure drum (4) via an intermediate pressure drum blow down pipe (7) for receiving sewage from the intermediate pressure drum (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221343752.4U CN217584394U (en) | 2022-05-31 | 2022-05-31 | Energy-saving system of boiler blow-down flash tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221343752.4U CN217584394U (en) | 2022-05-31 | 2022-05-31 | Energy-saving system of boiler blow-down flash tank |
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| Publication Number | Publication Date |
|---|---|
| CN217584394U true CN217584394U (en) | 2022-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221343752.4U Active CN217584394U (en) | 2022-05-31 | 2022-05-31 | Energy-saving system of boiler blow-down flash tank |
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| Country | Link |
|---|---|
| CN (1) | CN217584394U (en) |
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2022
- 2022-05-31 CN CN202221343752.4U patent/CN217584394U/en active Active
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