CN220707317U - Boiler continuous drainage heat recovery system - Google Patents
Boiler continuous drainage heat recovery system Download PDFInfo
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- CN220707317U CN220707317U CN202322364404.6U CN202322364404U CN220707317U CN 220707317 U CN220707317 U CN 220707317U CN 202322364404 U CN202322364404 U CN 202322364404U CN 220707317 U CN220707317 U CN 220707317U
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- boiler
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- red mud
- mud washing
- heat recovery
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- 238000011084 recovery Methods 0.000 title claims abstract description 21
- 238000005406 washing Methods 0.000 claims abstract description 66
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 36
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 17
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000002699 waste material Substances 0.000 abstract description 6
- 239000003657 drainage water Substances 0.000 description 9
- 238000001704 evaporation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003116 impacting effect Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000003814 drug Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
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- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The utility model relates to the technical field of alumina production, in particular to a boiler continuous drainage heat recovery system, which comprises a boiler and a red mud washing tank connected with the boiler through a first pipeline, wherein the tail end of the first pipeline is inserted into the position of one half to three quarters of the depth of the red mud washing tank, the tail end of the first pipeline is a closed end, and a plurality of through holes are formed in the side surface of the first pipeline, which is close to the tail end of the first pipeline. The utility model can fully recycle the heat and hot water of the continuous drainage of the boiler, effectively solves the problem of energy waste of the continuous drainage of the boiler of the alumina thermal power plant, solves the problem of impact vibration of the high-pressure continuous drainage on normal-pressure water in the red mud washing tank, and realizes the full and uniform heating of the red mud washing water.
Description
Technical Field
The utility model relates to the technical field of alumina production, in particular to a boiler continuous drainage heat recovery system.
Background
In the alumina production process, new steam is required to heat red mud washing water in a red mud washing tank to prevent product loss caused by hydrolysis of red mud in the washing process due to excessively low water temperature, the process is generally arranged in an evaporation process or a sedimentation process, the new steam at 0.7MPa and 190 ℃ is used for heating the red mud washing water in a direct or indirect mode, and the washing water is heated to about 95 ℃ from normal temperature to meet the red mud washing requirement. The heating steam consumption of the red mud washing water is generally about 30-50t/h according to the different alumina yield and ore quality.
Most of domestic alumina plants are matched with self-provided thermal power plants to provide steam and electric power for alumina production. The self-provided thermal power plant generally adopts a high-pressure boiler, various medicaments are required to be added all the time in the normal production process due to the high requirement of the boiler on water quality, so that various impurities in the boiler water are removed, the boiler water impurities separated after the medicaments are discharged in a mode of periodic pollution discharge and continuous pollution discharge, the continuous pollution discharge flow of the high-temperature high-pressure boiler at 450t/h is between 3 and 5t/h, the sewage pressure is about 9.0MPa, and the temperature is about 310 ℃.
In general, boiler continuous water discharged from an alumina self-contained thermal power plant is digested inside the thermal power plant. The high-temperature high-pressure continuous drainage enters a continuous drainage expander to carry out flash evaporation expansion, partial saturated steam with the pressure of 0.6MPa and the temperature of about 250 ℃ is generated by flash evaporation, a high-pressure deaerator is introduced into an outlet pipeline of the continuous drainage expander to be used as a heating steam source, a large amount of hot water after flash evaporation is about 150 ℃, and the continuous drainage has high impurity content for a boiler system and cannot be reused, so that the steam can be discharged into the atmosphere after flash evaporation expansion is carried out again only by introducing the constant-drainage expander of the boiler into a pipeline at the bottom of the continuous drainage expander, and the hot water at the temperature of 100 ℃ is discharged into a sewage system. In the system, only part of heat of continuous drainage is recovered, and a large amount of hot water and low-pressure steam are discharged in white. For an enterprise producing 200 ten thousand tons of alumina annually, about 4.3 ten thousand tons of hot water are discharged through the constant-row expander of the boiler annually, calculated as hot water at 150 ℃, which amounts to 1000 tons of standard coal. From the aspects of energy conservation, environmental protection and double carbon, the method belongs to great waste.
Disclosure of Invention
The utility model aims at solving the problems and provides a boiler continuous drainage heat recovery system, which uses the boiler continuous drainage to replace a part of new steam to heat red mud washing water, and fully recovers and utilizes the heat and hot water of the boiler continuous drainage, so that the problem of energy waste of the boiler continuous drainage of an alumina thermal power plant can be effectively solved, and standard coal is saved by 1000 tons every year.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a boiler even arranges water heat recovery system, includes boiler and passes through the red mud wash tank that first pipeline is connected with the boiler, the end of first pipeline inserts half to three quarters degree of depth departments to the red mud wash tank, the end of first pipeline is the blind end, and is close to a plurality of through-holes have been seted up on the first pipeline side at the end of first pipeline.
In the utility model, further, the tail end of the first pipeline is inserted into the two-thirds depth of the red mud washing tank.
In the utility model, the through hole is further formed in a first pipeline which is immersed in the red mud washing tank and has the length of 1 meter at the tail part.
In the utility model, the through hole is a small hole with the diameter of 10 mm.
In the utility model, further, the boiler continuous drainage heat recovery system further comprises a continuous drainage expansion tank, and the continuous drainage expansion tank is connected with the boiler through a second pipeline.
In the utility model, further, a first switching valve and a shutoff valve are sequentially arranged on the first pipeline along the direction from the boiler to the red mud washing tank.
In the utility model, further, a throttle orifice plate is arranged on the first pipeline close to the red mud washing tank, and the throttle orifice plate is positioned between the first switching valve and the shutoff valve.
In the utility model, further, the first pipeline is a high-pressure seamless steel pipe with phi of 60 mm.
In the utility model, further, a second switching valve is arranged on the second pipeline.
By adopting the technical scheme, the utility model has the following beneficial effects:
according to the utility model, the boiler continuous drainage water of the thermal power plant is conveyed to the red mud washing tank through the high-pressure pipeline, a part of new steam of red mud heating washing water is replaced, the heat and hot water of the boiler continuous drainage water are recycled, the problem of energy waste of the boiler continuous drainage water of the alumina thermal power plant is effectively solved, in order to solve the problem of impact of the high-pressure boiler continuous drainage water on the red mud washing tank, the tail end of the first pipeline is inserted into the position of one half to three quarters of the depth of the red mud washing tank, the tail end of the first pipeline is a closed end, and a plurality of through holes are formed in the side surface of the first pipeline, which is close to the tail end of the first pipeline, so that the red mud washing water is uniformly heated in a flute-shaped pipe mode, the problem of impact vibration of the high-pressure continuous drainage water on normal-pressure water in the red mud washing tank is successfully solved, and the red mud washing water is fully and uniformly heated.
Therefore, the utility model can effectively solve the problem of energy waste of continuous drainage of the alumina thermal power plant boiler, can create 120 ten thousand yuan per year according to standard coal unit price of 1200 yuan/ton calculation, has great help to reduce the production cost of alumina and energy-saving and carbon-reducing work, is simple and reliable, and can be popularized and applied in all alumina production enterprises.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a boiler continuous drainage heat recovery system according to the present utility model;
the reference numerals in the drawings are: the device comprises a 1-boiler, a 2-red mud washing tank, a 3-first pipeline, a 4-first switching valve, a 5-shutoff valve, a 6-throttling orifice plate, a 7-continuous blowdown flash tank, an 8-second pipeline and a 9-second switching valve.
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.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Example 1
Referring to fig. 1, a boiler continuous drainage heat recovery system comprises a boiler 1 and a red mud wash tank 2 connected with the boiler 1 through a first pipeline 3, wherein the tail end of the first pipeline 3 is inserted into the half to three-quarters depth of the red mud wash tank 2, the tail end of the first pipeline 3 is a closed end, and a plurality of through holes (not shown) are formed in the side surface of the first pipeline, which is close to the tail end of the first pipeline 3.
In this embodiment, as a further preferable technical scheme, the end of the first pipe 3 is inserted into the two-thirds depth of the red mud washing tank 2, that is, the distance from the end of the first pipe 3 to the bottom of the red mud washing tank 2 is one third of the depth of the red mud washing tank 2. For example, when the depth of the red mud washing tub 2 is 6 meters, the end of the first pipe 3 is inserted into the red mud washing tub 2 at a depth of 4 meters to prevent the high-pressure continuous drainage water from impacting the red mud washing tub.
As a further preferable technical scheme, the through holes are small holes with the diameter of 10mm, and the through holes are arranged on a first pipeline which is immersed in the red mud washing tank 2 and has the length of 1 meter at the tail part so as to fully and uniformly heat the normal pressure water in the red mud washing tank 2.
In this embodiment, the boiler continuous drainage heat recovery system further includes a continuous blowdown flash tank 7, where the continuous blowdown flash tank 7 is connected with the boiler through a second pipeline 8, so that when red mud washing water does not need to be carried out in the red mud washing water tank 2, the boiler continuous drainage can be further drained to the continuous blowdown flash tank 7, and a high-pressure deaerator is introduced through an outlet pipeline of the continuous blowdown flash tank 7 to be used as a heating steam source.
As a further preferable technical scheme, the first pipeline 3 is further provided with a first switching valve 4 and a shut-off valve 5 in sequence along the direction from the boiler 1 to the red mud washing tank 2, the continuous drainage flow of the boiler to the red mud washing tank 2 or the continuous blowdown flash tank 7 can be controlled by the first switching valve 4, and the continuous drainage flow of the boiler to the red mud washing tank 2 in the first pipeline 3 can be conveniently cut off by the shut-off valve 5. The second pipeline 8 is provided with a second switching valve 9, and the continuous drainage flow of the boiler can be controlled to the red mud washing tank 2 or the continuous blowdown flash tank 7 through the second switching valve 9.
In this embodiment, the first pipe 3 is a high-pressure seamless steel pipe with a diameter of 60mm, and the high-pressure seamless steel pipe is high-temperature and high-pressure resistant and has a long service life.
Example 2
Referring to fig. 1, a boiler continuous drainage heat recovery system comprises a boiler 1 and a red mud wash tank 2 connected with the boiler 1 through a first pipeline 3, wherein the tail end of the first pipeline 3 is inserted into the half to three-quarters depth of the red mud wash tank 2, the tail end of the first pipeline 3 is a closed end, and a plurality of through holes (not shown) are formed in the side surface of the first pipeline, which is close to the tail end of the first pipeline 3.
In this embodiment, as a further preferable technical scheme, the end of the first pipe 3 is inserted into the two-thirds depth of the red mud washing tank 2, that is, the distance from the end of the first pipe 3 to the bottom of the red mud washing tank 2 is one third of the depth of the red mud washing tank 2. For example, when the depth of the red mud washing tub 2 is 6 meters, the end of the first pipe 3 is inserted into the red mud washing tub 2 at a depth of 4 meters to prevent the high-pressure continuous drainage from impacting the red mud washing tub 2.
As a further preferable technical scheme, the through holes are small holes with the diameter of 10mm, and the through holes are arranged on a first pipeline which is immersed in the red mud washing tank 2 and has the length of 1 meter at the tail part so as to fully and uniformly heat the normal pressure water in the red mud washing tank 2.
In this embodiment, the boiler continuous drainage heat recovery system further includes a continuous blowdown flash tank 7, where the continuous blowdown flash tank 7 is connected with the boiler through a second pipeline 8, so that when red mud washing water does not need to be carried out in the red mud washing water tank 2, the boiler continuous drainage can be further drained to the continuous blowdown flash tank 7, and a high-pressure deaerator is introduced through an outlet pipeline of the continuous blowdown flash tank 7 to be used as a heating steam source.
As a further preferable technical scheme, the first pipeline 3 is further provided with a first switching valve 4 and a shut-off valve 5 in sequence along the direction from the boiler 1 to the red mud washing tank 2, the continuous drainage flow of the boiler to the red mud washing tank 2 or the continuous blowdown flash tank 7 can be controlled by the first switching valve 4, and the continuous drainage flow of the boiler to the red mud washing tank 2 in the first pipeline 3 can be conveniently cut off by the shut-off valve 5. The second pipeline 8 is provided with a second switching valve 9, and the continuous drainage flow of the boiler can be controlled to the red mud washing tank 2 or the continuous blowdown flash tank 7 through the second switching valve 9.
In this embodiment, the first pipe 3 is a high-pressure seamless steel pipe with a diameter of 60mm, and the high-pressure seamless steel pipe is high-temperature and high-pressure resistant and has a long service life.
In this embodiment, as a further preferable technical scheme, an orifice plate 6 is further disposed on the first pipeline 3 near the red mud washing tank 2, and the orifice plate 6 is located between the first switching valve 4 and the shutoff valve 5. The throttling orifice 6 plays a role in proper depressurization and buffer so as to prevent the high-pressure continuous drainage from excessively impacting the red mud washing tank 2.
Of course, a flowmeter (not shown) and a flow regulating valve (not shown) can be further arranged on the first pipeline 3, so that the water flow in the first pipeline 3 can be conveniently checked through the flowmeter, and the flow passing through the pipeline can be regulated through the flow regulating valve, and the water flow is prevented from being overlarge.
According to the utility model, the boiler continuous drainage water of the thermal power plant is conveyed to the red mud washing tank 2 through the high-pressure seamless steel pipe (namely the first pipeline 3), a part of new steam of red mud heating washing water is replaced, in order to solve the problem of impact of the high-pressure boiler continuous drainage water on the red mud washing tank 2, the tail end of the first pipeline 3 is inserted into the position of one half to three quarters of the depth of the red mud washing tank 2, the tail end of the first pipeline 3 is a closed end, and a plurality of through holes are formed in the side surface of the first pipeline 3, which is close to the tail end of the first pipeline 3, so that the red mud washing water is uniformly heated in a flute pipe mode, the problem of impact vibration of the high-pressure continuous drainage water on normal-pressure water in the red mud washing tank is successfully solved, and the full uniform heating is realized.
The utility model can effectively solve the problem of energy waste of continuous drainage of the alumina thermal power plant boiler, can create 120 ten thousand yuan per year according to the standard coal unit price of 1200 yuan/ton calculation, has great help to reduce the alumina production cost and energy-saving and carbon-reducing work, is simple and reliable, and can be popularized and applied in all alumina production enterprises.
Claims (9)
1. A boiler continuous drainage heat recovery system is characterized in that: the device comprises a boiler and a red mud washing tank connected with the boiler through a first pipeline, wherein the tail end of the first pipeline is inserted into one half to three quarters of the depth of the red mud washing tank, the tail end of the first pipeline is a closed end, and a plurality of through holes are formed in the side face of the first pipeline, which is close to the tail end of the first pipeline.
2. A boiler tie-drain heat recovery system as defined in claim 1, wherein: the tail end of the first pipeline is inserted into the two-thirds depth of the red mud washing tank.
3. A boiler tie-drain heat recovery system as defined in claim 2, wherein: the through hole is arranged on a first pipeline which is immersed in the red mud washing tank and has the length of 1 meter at the tail part.
4. A boiler tie-drain heat recovery system as defined in claim 3, wherein: the through hole is a small hole with the diameter of 10 mm.
5. A boiler tie-drain heat recovery system as defined in claim 1, wherein: the continuous blowdown flash tank is connected with the boiler through a second pipeline.
6. A boiler tie-drain heat recovery system as defined in claim 4, wherein: and a first switching valve and a shutoff valve are also sequentially arranged on the first pipeline along the direction from the boiler to the red mud washing tank.
7. A boiler tie-drain heat recovery system according to claim 5, wherein: and an orifice plate is further arranged on the first pipeline, close to the red mud washing tank, and is positioned between the first switching valve and the shutoff valve.
8. A boiler tie-drain heat recovery system as defined in claim 6, wherein: the first pipeline is a high-pressure seamless steel pipe with the diameter of 60 mm.
9. A boiler tie-drain heat recovery system according to claim 5, wherein: and a second switching valve is arranged on the second pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322364404.6U CN220707317U (en) | 2023-08-31 | 2023-08-31 | Boiler continuous drainage heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322364404.6U CN220707317U (en) | 2023-08-31 | 2023-08-31 | Boiler continuous drainage heat recovery system |
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| Publication Number | Publication Date |
|---|---|
| CN220707317U true CN220707317U (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322364404.6U Active CN220707317U (en) | 2023-08-31 | 2023-08-31 | Boiler continuous drainage heat recovery system |
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| Country | Link |
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| CN (1) | CN220707317U (en) |
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2023
- 2023-08-31 CN CN202322364404.6U patent/CN220707317U/en active Active
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