CN209945053U - White feather eliminating device for steel plant - Google Patents
White feather eliminating device for steel plant Download PDFInfo
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- CN209945053U CN209945053U CN201920380485.XU CN201920380485U CN209945053U CN 209945053 U CN209945053 U CN 209945053U CN 201920380485 U CN201920380485 U CN 201920380485U CN 209945053 U CN209945053 U CN 209945053U
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Abstract
The utility model relates to a white feather remove device of steel plant handles the exhaust steam that the steel plant discharged, sprays the exhaust steam condensation cooling of congealing the gas tower and passing through the cooling water to the input, and the gas outlet that sprays the congealing the gas tower is connected and is removed the saturation mixing tower, and it is equipped with first heat exchanger tube bank to remove the saturation mixing tower, and the cooling water carries out the heat exchange with the ambient air who comes from the air inlet window in first heat exchanger tube bank, and ambient air and exhaust steam discharge after mixing in removing the saturation mixing tower. The utility model has the advantages that: heating part of ambient air by using dead steam cooling water, mixing the heated part of ambient air with uncondensed saturated noncondensable gas, diluting the mixture, and heating the mixture to form unsaturated noncondensable gas; the exhaust steam is mixed with the ambient air with the mass more than 10 times, and the formed mixed gas has low humidity, can effectively eliminate white feather and saves energy consumption.
Description
Technical Field
The utility model belongs to gas emission defogging device especially relates to a steel plant white feather remove device.
Background
In the iron and steel industry, high-humidity hot gas can be generated on occasions of slag flushing water steam exhaust of an iron-making blast furnace, sintering steam exhaust wet desulphurization flue gas, continuous casting secondary cooling steam, a cooling tower and the like, and a large amount of white fog can be generated during discharge, so that the white fog is called as white feather. Particularly, white feather at the positions of blast furnace slag flushing water steam exhaust, sintering steam exhaust wet desulphurization flue gas, continuous casting secondary cooling steam and the like has high temperature, large moisture content and corrosive substances in gas, has serious influence on the environment and is one of the reasons for causing haze. At present, the common measures for eliminating the white feather are dehumidification and heating. The dehumidification process is to condense the exhaust steam by using a refrigerant, and the condensing mode comprises a direct condensing mode and an indirect condensing mode. The heating is to reheat the condensed saturated gas by waste heat so that the exhaust gas is in an unsaturated state. The disadvantages of the current common measures for eliminating white feather are: the heating heat source is consumed, the humidity of the exhaust outlet is large, and the white feather is not completely eliminated.
Disclosure of Invention
The utility model aims at providing a steel plant white feather remove device's technical scheme, save the heat energy consumption who eliminates white feather, improve the effect that white feather was eliminated.
In order to realize the purpose, the technical scheme of the utility model is that: a white feather eliminating device for an iron and steel plant is used for treating exhaust steam discharged by the iron and steel plant and comprises a spraying condensing tower and a desaturation mixing tower; the exhaust steam condensation cooling of congealing the gas column and passing through the cooling water to the input, the gas outlet that sprays congealing the gas column is through first pipe connection go the saturation mixing tower, it is equipped with first heat exchanger tube bank, exhaust fan and air inlet window to go the saturation mixing tower, first heat exchanger tube bank is the heat exchanger tube bank that carries out the heat exchange with the ambient air that comes from the air inlet window, the exhaust fan discharges go the mixed gas of exhaust steam and ambient air in the saturation mixing tower.
Furthermore, in order to enter the ambient air, the mixing of the exhaust steam and the ambient air is realized, the exhaust fan is arranged at the top of the desaturation mixing tower, the air inlet window is arranged below the first heat exchange tube bundle, the desaturation mixing tower is provided with a first interface connected with the first pipeline, and the first interface is arranged above the first heat exchange tube bundle.
Furthermore, in order to improve the mixing effect of the dead steam and the ambient air, a gas mixing filler is arranged in the desaturation mixing tower, and the first pipeline is provided with a flow regulating valve.
Furthermore, in order to realize cooling circulation of cooling water, the cooling water output interface of the spray condensing tower is connected with the input interface of the first heat exchange tube bundle through a second pipeline, and the output interface of the first heat exchange tube bundle is connected with the cooling water input interface of the spray condensing tower through a third pipeline.
Furthermore, the service life of the first heat exchange tube bundle is prolonged, the white feather eliminating device is provided with a secondary heat exchanger, the secondary heat exchanger comprises a second heat exchange tube bundle through which the cooling water flows, and secondary heat exchange water for exchanging heat with the second heat exchange tube bundle is arranged in the secondary heat exchanger; the cooling water output interface of the spray condensing tower is connected with the input interface of the second heat exchange tube bundle through a second pipeline, the output interface of the second heat exchange tube bundle is connected with the cooling water input interface of the spray condensing tower through a third pipeline, the secondary heat exchange water output interface of the secondary heat exchanger is connected with the input interface of the first heat exchange tube bundle through a fourth pipeline, and the output interface of the first heat exchange tube bundle is connected with the secondary heat exchange water input interface of the secondary heat exchanger through a fifth pipeline.
Furthermore, in order to improve the heat exchange efficiency of the secondary heat exchanger, the secondary heat exchanger is provided with a secondary heat exchange spray head and a water distribution plate, the water distribution plate is arranged above the second heat exchange tube bundle, and the secondary heat exchange spray head is arranged above the water distribution plate.
The utility model has the advantages that: heating part of ambient air by using dead steam cooling water, mixing the heated part of ambient air with uncondensed saturated noncondensable gas, diluting the mixture, and heating the mixture to form unsaturated noncondensable gas; the exhaust steam is mixed with the ambient air with the mass more than 10 times, and the formed mixed gas has low humidity, can effectively eliminate white feather and saves energy consumption.
The present invention will be described in detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a block diagram of the present invention, in which cooling water directly heats ambient air;
fig. 2 is the structure of the utility model, which is provided with a secondary heat exchanger, the cooling water and the secondary heat exchanging water exchange heat, and the secondary heat exchanging water heats the ambient air.
Detailed Description
Referring to fig. 1, a white feather eliminating device for steel plants, which treats exhaust steam discharged by the steel plants, comprises a spraying condensing tower 10 and a desaturation mixing tower 20; the condensing tower sprays and cools down the exhaust steam 41 of input through cooling water 31, the gas outlet that sprays the condensing tower is connected through first pipeline 11 go the saturation mixing tower, it is equipped with first heat exchanger tube bank 21, exhaust fan 22 and air inlet window 23 to go the saturation mixing tower, first heat exchanger tube bank carries out the heat exchange tube bank of heat exchange with the ambient air 42 that comes from the air inlet window, the exhaust fan discharges go the mixed gas 44 of exhaust steam and ambient air in the saturation mixing tower.
The exhaust fan is arranged at the top of the desaturation mixing tower, the air inlet window is arranged below the first heat exchange tube bundle, the desaturation mixing tower is provided with a first interface 24 connected with the first pipeline, and the first interface is arranged above the first heat exchange tube bundle.
The desaturation mixing tower is internally provided with a gas mixing filler 25, and the first pipeline is provided with a flow regulating valve 12.
The cooling water output interface 13 of the spray condensing tower is connected with the input interface 26 of the first heat exchange tube bundle through a second pipeline 14, and the output interface 27 of the first heat exchange tube bundle is connected with the cooling water input interface 16 of the spray condensing tower through a third pipeline 15.
As shown in fig. 2, in a further aspect, the white feather removing device is provided with a secondary heat exchanger 50, the secondary heat exchanger comprises a second heat exchange tube bundle 51 through which the cooling water flows, and the secondary heat exchanger is provided with secondary heat exchange water 32 which exchanges heat with the second heat exchange tube bundle; the cooling water output interface 13 of the spray condensing tower is connected with the input interface 52 of the second heat exchange tube bundle through a second pipeline 14, the output interface 53 of the second heat exchange tube bundle is connected with the cooling water input interface 16 of the spray condensing tower through a third pipeline 15, the secondary heat exchange water output interface 53 of the secondary heat exchanger is connected with the input interface 26 of the first heat exchange tube bundle through a fourth pipeline 54, and the output interface 27 of the first heat exchange tube bundle is connected with the secondary heat exchange water input interface 56 of the secondary heat exchanger through a fifth pipeline 55.
The secondary heat exchanger is provided with a secondary heat exchange spray nozzle 57 and a water distribution plate 58, the water distribution plate is arranged above the second heat exchange tube bundle, and the secondary heat exchange spray nozzle is arranged above the water distribution plate.
The first embodiment is as follows:
referring to fig. 1, a white feather eliminating device for an iron and steel plant, which is used for treating exhaust steam discharged by the iron and steel plant, comprises a spraying condensing tower 10 and a desaturation mixing tower 20.
And the spray condensing tower adopts spray cooling water to cool the high-temperature exhaust steam. The upper part of the spraying condensing tower is provided with a cooling water spray head 17. The bottom of the spray condensing tower stores cooling water 31 (the cooling water contains part of condensed water generated in the process of temperature reduction and condensation of the exhaust steam). The lower part of the spraying condensing tower is provided with an air inlet 18. The top of the spraying condensing tower is provided with an air outlet 19. The bottom of the spraying gas condensation tower is provided with a cooling water output interface 13, the spraying gas condensation tower is provided with a cooling water input interface 16, and the cooling water input interface is connected with a cooling water spray head 17.
The desaturation mixing tower is provided with a first heat exchange tube bundle 21, an exhaust fan 22 and an air inlet window 23, the exhaust fan is arranged at the top of the desaturation mixing tower, and the air inlet window is arranged at the bottom of the desaturation mixing tower and below the first heat exchange tube bundle. The first heat exchange tube bundle adopts an aluminum alloy fin heat exchange tube.
The desaturation mixing tower is provided with a first interface 24 connected with a first pipeline, and the first interface is arranged above the first heat exchange tube bundle. And a gas mixing filler 25 is arranged above the first interface.
An air inlet 18 of the spraying and condensing tower is connected with a dead steam source through an air inlet pipeline 61, and the air inlet pipeline is provided with an air inlet fan 62. The source of dead steam in this embodiment is a dead steam collector 60. The gas outlet of the spraying condensing tower is connected with a first connector 24 of the desaturation mixing tower through a first pipeline 11, and the first pipeline is provided with a flow regulating valve 12. The cooling water output interface 13 of the spraying condensing tower is connected with the input interface 26 of the first heat exchange tube bundle of the desaturation mixing tower through the second pipeline 14, the second pipeline 14 is provided with a cooling water circulating water pump 71, and the output interface 27 of the first heat exchange tube bundle is connected with the cooling water input interface 16 of the spraying condensing tower through the third pipeline 15.
The spraying condensing tower condenses and cools the input high-temperature exhaust steam 41 through cooling water 31. High-temperature exhaust steam enters the spraying condensing tower from the air inlet 18, cooling water cools the high-temperature exhaust steam through the cooling water spray head 17, meanwhile, the cooling water is heated, and the cooling water also contains condensed water generated in the exhaust steam cooling process. The cooling water is circulating water, and is circulated by a cooling water circulation pump 71. The cooling water flows through the first heat exchange tube bundle, and the first heat exchange tube bundle exchanges heat with the ambient air 42 from the air inlet window 23, so that the cooling water is cooled and the ambient air is heated. The cooled cooling water is delivered to the cooling water header 17. The cooled exhaust steam 44 enters the desaturation mixing tower from the first connector 24, the heated ambient air is mixed with the cooled exhaust steam in the desaturation mixing tower, and the mixed gas 43 is discharged from the top of the desaturation mixing tower through the gas mixing filler 25 under the action of the exhaust fan. The content of the ambient air in the mixed gas is far greater than that of the dead steam, the mixed gas is in an unsaturated state, and the discharged mixed gas can eliminate white feather.
The mixed filler can improve the mixing effect of the two gases (the heated ambient air and the condensed exhaust steam).
Example two:
a white feather elimination method for steel plants. In this embodiment, the method for processing the exhaust steam discharged from the iron and steel plant by using the white feather removing device in the iron and steel plant in the embodiment one includes:
a. and condensing the dead steam 41 by using cooling water to reduce the temperature. The step is completed in a spraying condensing tower, the temperature of the exhaust steam 41 is 80 ℃ saturated gas before condensation and temperature reduction, and the cooled exhaust steam 44 is 58 ℃ saturated gas after condensation and temperature reduction and is conveyed to a desaturation mixing tower through a first pipeline. And the condensed water generated in the exhaust steam cooling process is melted into the cooling water. The flow of the exhaust steam entering the spraying condensing tower is 41000 cubic meters per hour, and the temperature of cooling water for finishing heat exchange in the spraying condensing tower is 55 ℃.
b. And (c) heating the ambient air by using the heat of the cooling water with the increased temperature in the step (a). The cooling water flows through the first heat exchange tube bundle, and the first heat exchange tube bundle exchanges heat with the ambient air 42 from the air inlet window 23, so that the cooling water is cooled and the ambient air is heated. The temperature of the ambient air entering the desaturation mixing tower is 5 ℃, the flow rate is 410000 cubic meters per hour, the temperature of the cooling water which completes the heat exchange in the desaturation mixing tower is reduced to 45 ℃, and the ambient air which completes the heat exchange is heated to 51 ℃.
c. And (c) mixing the ambient air heated in the step (b) with the exhaust steam condensed and cooled in the step (a) and then outputting. The heated ambient air is mixed with the cooled exhaust steam 44 in the desaturation mixing tower, and the mixed gas 43 is discharged from the top of the desaturation mixing tower through the gas mixing filler 25 under the action of an exhaust fan. The temperature of the mixed gas 43 was 52 ℃. The content of the ambient air in the mixed gas is far greater than that of the dead steam, the mixed gas is in an unsaturated state, and the discharged mixed gas can eliminate white feather.
In this embodiment, in step b, the cooling water with increased temperature directly heats the ambient air through the first heat exchange tube bundle, which has higher heat exchange efficiency.
Example three:
referring to fig. 2, a white feather eliminating device for steel plants, which is used for treating exhaust steam discharged by the steel plants. This embodiment is an improvement of the first embodiment.
In this embodiment, the white feather removing device is provided with a secondary heat exchanger 50, which is disposed below the desaturation mixing tower and is integrated with the desaturation mixing tower.
The secondary heat exchanger comprises a second heat exchange tube bundle 51 through which cooling water flows, and the second heat exchange tube bundle adopts 2205 dual-phase steel. And secondary heat exchange water 32 for exchanging heat with the second heat exchange tube bundle is arranged in the secondary heat exchanger, and is stored at the bottom of the secondary heat exchanger. The secondary heat exchanger is provided with a secondary heat exchange spray nozzle 57 and a water distribution plate 58, the water distribution plate is arranged above the second heat exchange tube bundle, and the secondary heat exchange spray nozzle is arranged above the water distribution plate. The secondary heat exchange spray head sprays secondary heat exchange water on the water distribution plate, and the water distribution plate uniformly sprays the secondary heat exchange water on the second heat exchange tube bundle.
The cooling water output interface 13 of the spray condensing tower is connected with the input interface 52 of the second heat exchange tube bundle through the second pipeline 14, the output interface 53 of the second heat exchange tube bundle is connected with the cooling water input interface 16 of the spray condensing tower through the third pipeline 15, the bottom of the secondary heat exchanger is provided with a secondary heat exchange water output interface 53, the secondary heat exchange water output interface is connected with the input interface 26 of the first heat exchange tube bundle through the fourth pipeline 54, the fourth pipeline is provided with a secondary heat exchange water pump 72, and the output interface 27 of the first heat exchange tube bundle is connected with the secondary heat exchange water input interface 56 of the secondary heat exchanger through the fifth pipeline 55.
Because corrosive substances exist in the exhaust steam of the steel plant, and in order to improve the heat exchange effect of the ambient air, the finned tubes of the aluminum alloy are adopted by the first heat exchange tube bundles, and the corrosion resistance of the finned tubes of the aluminum alloy is not ideal enough. The mode of secondary heat transfer has been adopted to this embodiment, and second heat exchange tube bank adopts and does not take fin 2205 diphase steel pipe, when adopting water as heat-exchanging agent, 2205 diphase steel pipe has good heat conductivility equally, and is little to the effect influence of heat exchange. And the 2205 double-phase steel pipe has better corrosion resistance and can be conveniently maintained and replaced.
Example four:
a white feather elimination method for steel plants. In this embodiment, the white feather removing apparatus for an iron and steel plant according to the third embodiment is used for treating exhaust steam discharged from the iron and steel plant, and the method includes:
a. and condensing the dead steam 41 by using cooling water to reduce the temperature. The step is completed in a spraying condensing tower, the temperature of the exhaust steam 41 is 80 ℃ saturated gas before condensation and temperature reduction, and the cooled exhaust steam 44 is 59 ℃ saturated gas after condensation and temperature reduction and is conveyed to a desaturation mixing tower through a first pipeline. The flow of the exhaust steam entering the spraying gas condensation tower is 41000 cubic meters per hour, and the temperature of cooling water for finishing heat exchange in the spraying gas condensation tower is 55 ℃.
b. And (c) heating the ambient air by using the heat of the cooling water with the increased temperature in the step (a). The cooling water with the increased temperature in the step a is firstly subjected to heat exchange with the secondary heat exchange water. The cooling water flows through the second heat exchange tube bundle 51, and the second heat exchange tube bundle exchanges heat with the secondary heat exchange water 32, so that the cooling water is cooled to 45 ℃, and the temperature of the secondary heat exchange water is raised to 50 ℃. The secondary heat exchange water with increased temperature heats the ambient air, and the secondary heat exchange water flows through the first heat exchange tube bundle through the fourth pipeline 54, and the first heat exchange tube bundle performs heat exchange with the ambient air 42 from the air inlet window 23, so that the secondary heat exchange water is cooled, and the ambient air is heated. The temperature of the ambient air entering the desaturation mixing tower is 5 ℃, the flow rate is 410000 cubic meters per hour, the temperature of the secondary heat exchange water after heat exchange in the desaturation mixing tower is reduced to 40 ℃, and the ambient air after heat exchange is heated to 48 ℃.
c. And (c) mixing the ambient air heated in the step (b) with the exhaust steam condensed and cooled in the step (a) and then outputting. The heated ambient air is mixed with the cooled exhaust steam 44 in the desaturation mixing tower, and the mixed gas 43 is discharged from the top of the desaturation mixing tower through the gas mixing filler 25 under the action of an exhaust fan. The temperature of the mixed gas 43 was 46 ℃. The content of the ambient air in the mixed gas is far greater than that of the dead steam, the mixed gas is in an unsaturated state, and the discharged mixed gas can eliminate white feather.
Claims (6)
1. A white feather eliminating device for an iron and steel plant is used for treating exhaust steam discharged by the iron and steel plant and is characterized by comprising a spraying gas condensing tower and a desaturation mixing tower; the exhaust steam condensation cooling of congealing the gas column and passing through the cooling water to the input, the gas outlet that sprays congealing the gas column is through first pipe connection go the saturation mixing tower, it is equipped with first heat exchanger tube bank, exhaust fan and air inlet window to go the saturation mixing tower, first heat exchanger tube bank is the heat exchanger tube bank that carries out the heat exchange with the ambient air that comes from the air inlet window, the exhaust fan discharges go the mixed gas of exhaust steam and ambient air in the saturation mixing tower.
2. The white feather elimination device of the steel and iron plant of claim 1, wherein said exhaust fan is disposed on the top of said desaturation mixing tower, said air intake window is disposed under said first heat exchange tube bundle, said desaturation mixing tower is provided with a first interface connected with said first pipeline, said first interface is disposed above said first heat exchange tube bundle.
3. The white feather elimination device of the steel and iron plant as claimed in claim 1, wherein said desaturation mixing tower is provided with a gas mixture filler, and said first pipeline is provided with a flow regulating valve.
4. The white feather elimination device of the steel and iron plant as claimed in claim 1, wherein the cooling water output interface of the spray condensing tower is connected with the input interface of the first heat exchange tube bundle through a second pipeline, and the output interface of the first heat exchange tube bundle is connected with the cooling water input interface of the spray condensing tower through a third pipeline.
5. The white feather removing device of the steel plant as claimed in claim 1, wherein said white feather removing device is provided with a secondary heat exchanger, said secondary heat exchanger comprises a second heat exchange tube bundle through which said cooling water flows, said secondary heat exchanger is provided with secondary heat exchange water for exchanging heat with said second heat exchange tube bundle; the cooling water output interface of the spray condensing tower is connected with the input interface of the second heat exchange tube bundle through a second pipeline, the output interface of the second heat exchange tube bundle is connected with the cooling water input interface of the spray condensing tower through a third pipeline, the secondary heat exchange water output interface of the secondary heat exchanger is connected with the input interface of the first heat exchange tube bundle through a fourth pipeline, and the output interface of the first heat exchange tube bundle is connected with the secondary heat exchange water input interface of the secondary heat exchanger through a fifth pipeline.
6. The white feather elimination device of the steel and iron plant of claim 5, wherein the secondary heat exchanger is provided with a secondary heat exchange spray head and a water distribution plate, the water distribution plate is arranged above the second heat exchange tube bundle, and the secondary heat exchange spray head is arranged above the water distribution plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920380485.XU CN209945053U (en) | 2019-03-25 | 2019-03-25 | White feather eliminating device for steel plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920380485.XU CN209945053U (en) | 2019-03-25 | 2019-03-25 | White feather eliminating device for steel plant |
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| Publication Number | Publication Date |
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| CN209945053U true CN209945053U (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920380485.XU Withdrawn - After Issue CN209945053U (en) | 2019-03-25 | 2019-03-25 | White feather eliminating device for steel plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109839012A (en) * | 2019-03-25 | 2019-06-04 | 北京凯德菲节能工程技术有限公司 | A kind of white plumage cancellation element of steel plant and method |
-
2019
- 2019-03-25 CN CN201920380485.XU patent/CN209945053U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109839012A (en) * | 2019-03-25 | 2019-06-04 | 北京凯德菲节能工程技术有限公司 | A kind of white plumage cancellation element of steel plant and method |
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