CN210176893U - Colored smoke plume eliminating device of converter primary dust removing system - Google Patents
Colored smoke plume eliminating device of converter primary dust removing system Download PDFInfo
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- CN210176893U CN210176893U CN201921136554.9U CN201921136554U CN210176893U CN 210176893 U CN210176893 U CN 210176893U CN 201921136554 U CN201921136554 U CN 201921136554U CN 210176893 U CN210176893 U CN 210176893U
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- condensation
- flue gas
- smoke
- heat exchanger
- cold water
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- 239000000779 smoke Substances 0.000 title claims abstract description 57
- 239000000428 dust Substances 0.000 title claims abstract description 47
- 238000009833 condensation Methods 0.000 claims abstract description 90
- 230000005494 condensation Effects 0.000 claims abstract description 90
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000001816 cooling Methods 0.000 claims abstract description 31
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 20
- 238000009413 insulation Methods 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims abstract description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 87
- 239000003546 flue gas Substances 0.000 claims description 86
- 239000007789 gas Substances 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000010521 absorption reaction Methods 0.000 claims description 11
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims description 10
- 238000005453 pelletization Methods 0.000 claims description 5
- 230000008030 elimination Effects 0.000 claims 1
- 238000003379 elimination reaction Methods 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 13
- 239000003034 coal gas Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000002378 acidificating effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000009628 steelmaking Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model relates to a colored smoke plume eliminating device of a converter primary dust removing system, which comprises a saturated damp and hot smoke condensation dehumidifier arranged at the front side of a fan, wherein the saturated damp and hot smoke condensation dehumidifier comprises a lower condensation chamber and an upper condensation chamber which are connected through a plurality of natural condensation pipes, one side of the lower condensation chamber is provided with a smoke inlet which is connected with a processing device at the front end of the converter primary dust removing system, the outer wall of the lower condensation chamber is provided with a cold water coil pipe, a heat insulation device is arranged outside the cold water coil pipe and the outer wall of the lower condensation chamber, a smoke condensation cooling heat exchanger and a demister are arranged in the upper condensation chamber from bottom to top, the upper end of the upper condensation chamber is provided with a smoke outlet which is connected with the fan, the cold water coil pipe and the smoke condensation cooling heat exchanger are both connected with a refrigerating device outside the saturated damp and hot smoke condensation dehumidifier, the colored smoke plume eliminating device, can eliminate the problems of smoke plume and corrosion of the recovered gas pipeline to the maximum extent, and has good condensation and cooling effects.
Description
Technical Field
The utility model relates to a dust pelletizing system especially relates to a converter is dust pelletizing system colored smoke plume remove device once.
Background
Converter steelmaking has become the main steelmaking process of steel enterprises, and a converter generates gas containing carbon monoxide as a main component, a small amount of carbon dioxide and other trace components in the blowing process, and a large amount of iron oxide, metal iron particles and other fine particle solid dust are carried in the gas, so that the pollution to the atmosphere and the workshop environment is serious. Therefore, the problem to be solved at present is to improve the technical level of the converter dust removal system and effectively control and reduce the emission of the atmospheric pollutants in steel making.
The temperature of the converter flue gas outlet is about 1400-1600 ℃, and the dust concentration is 70-200 g/m3After leaving the furnace mouth, the gas is cooled to 800-1000 ℃ by a vaporization cooling flue or a water cooling flue, and then enters a flue gas dust removal system to reduce the dust concentration so as to meet the national emission standard and the requirements of gas users. At present, the primary flue gas dust removal system of the domestic converter mainly comprises a traditional OG method, a novel OD method, a semi-dry method, a dry method and other dust removal systems.
(1) The whole process of the traditional OG method dust removal system adopts a wet treatment process, and the technology has the defects that the dust content of the coal gas treated by ① is high and cannot reach less than or equal to 10mg/m3If the coal gas is used, an electric dust collector is arranged at the rear part of the coal gas for fine dust removal, and the dust content mass concentration of the coal gas is reduced to be less than or equal to 10mg/m 3②, the sewage of the system needs to be treated due to secondary pollution, ③ system has large resistance loss, so the energy consumption is high, the occupied area is large, and the traditional OG dust removal system can not meet the requirements along with the improvement of national energy conservation and emission reduction requirements.
(2) The novel OG method dust pelletizing system is improved on the basis of the traditional OG method dust pelletizing system. The technology has the characteristics of simple flow, less unit equipment, small resistance loss and the like. The second sentence adopts RSW technology (namely, the throat-adjustable second sentence is changed into a circular seam washer), so that the dust removal efficiency is high, the control is easy, and the blockage is not easy. The emission concentration is reduced, but the circulating water amount is not greatly reduced, and the dust cleaning period of the fan impeller is not prolonged.
(3) The semi-dry process dedusting system is based on dry evaporation cooling technology, and has the advantages of low resistance of ① system, capacity of ensuring dust exhaust of 50mg/m 3 or saving 1-2 kWh in power per ton of steel, 50% reduced water circulating amount of ②, and prolonged maintenance period of ③ blower.
(4) The dry converter dedusting is developed cooperatively by foreign companies in the end of the 20 th century and the 60 th era. The basic principle of dry dedusting of the converter is that high-temperature coal gas passing through a vaporization flue is cooled by spraying water, the temperature of the coal gas is reduced from 800-1000 ℃ to about 200 ℃, and an electric precipitator is used for treatment. The converter dry dedusting system mainly comprises: evaporative coolers, electrostatic precipitators, gas switching, gas coolers, blow-off chimneys, ash removal systems, and the like.
The most outstanding advantages are as follows: the dust content of the purified smoke is 10mg/Nm3～20mg/Nm3If special requirements are met, the concentration can be reduced to 5mg/Nm3。
Although the technology development of the converter primary flue gas dry dedusting process is mature so far, and the dust content of coal gas and the dust content of diffused flue gas can be completely reduced to a very low level, a significant problem to be solved exists from the viewpoint of modern science and technology:
the dry and semi-dry cooling methods both adopt an evaporative cooling mechanism, while the wet dust removal adopts a saturated cooling mechanism and adopts water, so that the following problems are caused:
1. the diffused flue gas belongs to saturated damp and hot flue gas, the flue gas contains a large amount of water vapor, and the water vapor contains a certain amount of acidic substances and SO3Aerosol, dust, etc. (all being the main components of haze). The flue gas is directly discharged from a chimney and enters the ambient air with lower temperature, and because the saturation humidity of the ambient air is lower, the water vapor in the flue gas can be condensed to form white smoke plume in the process of reducing the temperature of the flue gas”。
2. The recovered coal gas belongs to saturated damp-heat gas, which contains a large amount of water vapor containing a certain amount of acidic substances (CO)2) During the temperature reduction of the gas, water vapor in the gas condenses to form water, and CO contained in the gas2Easily react with condensed water to generate H2CO3Corrosion of gas pipelines and associated equipment.
These problems will be urgently solved and perfected.
SUMMERY OF THE UTILITY MODEL
The applicant aims at the defects, researches and improves the defects, and provides a device for eliminating the colored smoke plume of the primary dust removal system of the converter.
The utility model discloses the technical scheme who adopts as follows:
the colored smoke plume eliminating device for the converter primary dust removing system comprises a saturated damp and hot smoke condensing dehumidifier arranged on the front side of a fan of the converter primary dust removing system, the saturated damp and hot flue gas condensation dehumidifier comprises a lower condensation cavity and an upper condensation cavity, the upper condensation cavity and the lower condensation cavity are connected through a plurality of natural condensation pipes, one side of the lower condensation cavity is provided with a smoke inlet which is connected with a processing device at the front end of a primary dust removal system of the converter through a smoke pipeline, and the outer wall of the lower condensation chamber is provided with a cold water coil, and the outer walls of the cold water coil and the lower condensation chamber are provided with a heat insulation device, the upper condensation chamber is internally provided with a flue gas condensation cooling heat exchanger and a demister in sequence from bottom to top, and the upper end of the upper condensation cavity is provided with a smoke exhaust port which is connected with the fan through a smoke pipeline, the cold water coil and the flue gas condensation cooling heat exchanger are both connected with a refrigerating device outside the saturated damp-heat flue gas condensation dehumidifier.
The fan is connected with the gas tank and the chimney through the switching station, a smoke heating heat exchanger is arranged in the chimney, a smoke heat absorption heat exchanger is arranged on a smoke pipeline connected with the smoke inlet in a matched mode, the smoke heating heat exchanger and the smoke heat absorption heat exchanger are connected through a circulating pipeline, and a circulating pump is arranged on the circulating pipeline.
The outside of the natural condenser pipe is provided with a plurality of fins, and the inside of the natural condenser pipe is provided with a spiral flow deflector.
And the part of the condensation cooling heat exchanger arranged in the upper condensation cavity extends into the natural condensation pipe.
The cold water coil and the flue gas condensation cooling heat exchanger are connected with a refrigerating device through a cold water pipe.
The refrigerating device is a lithium bromide refrigerating device.
The utility model has the advantages as follows: the colored smoke plume eliminating device of the converter primary dust removing system can remove water vapor, acidic substances, aerosol and micro-dust in saturated damp and hot smoke to the maximum extent, reduce the temperature of the smoke, further eliminate the problems of smoke plume and corrosion of a recycled gas pipeline to the maximum extent, and has good condensation and cooling effects.
Drawings
FIG. 1 is a schematic connection diagram of the device for eliminating colored smoke plume in a primary dust removal system of a converter according to the present invention.
In the figure: 1. a fan; 2. a saturated damp and hot flue gas condensation dehumidifier; 21. a lower condensation chamber; 211. a flue gas inlet; 212. a cold water coil pipe; 22. an upper condensation chamber; 221. a flue gas condensation cooling heat exchanger; 222. a demister; 223. a smoke exhaust port; 23. a natural condenser tube; 231. a fin; 232. a spiral flow deflector; 3. a flue gas duct; 31. a flue gas heat absorption heat exchanger; 4. a refrigeration device; 5. switching stations; 6. a chimney; 61. a flue gas heating heat exchanger; 7. a circulation pipe; 71. a circulation pump; 8. a cold water pipe.
Detailed Description
As shown in fig. 1, the colored smoke plume eliminating device of the converter primary dust removing system of the present embodiment includes a saturated moist heat flue gas condensation dehumidifier 2 disposed in front of a fan 1 of the converter primary dust removing system, the saturated moist heat flue gas condensation dehumidifier 2 includes a lower condensation chamber 21 and an upper condensation chamber 22, the upper condensation chamber 22 and the lower condensation chamber 21 are connected by a plurality of natural condensation pipes 23, a flue gas inlet 211 is disposed on one side of the lower condensation chamber 21, the flue gas inlet 211 is connected to a processing device at the front end of the converter primary dust removing system by a flue gas pipeline 3, a cold water coil 212 is disposed on the outer wall of the lower condensation chamber 21, a heat insulation device is disposed outside the cold water coil 212 and the outer wall of the lower condensation chamber 21, a flue gas condensation cooling heat exchanger 221 and a demister 222 are sequentially disposed in the upper condensation chamber 22 from bottom to top, a flue gas outlet 223 is disposed at the upper end of the upper condensation chamber 22, the, the cold water coil 212 and the flue gas condensation cooling heat exchanger 221 are both connected with a lithium bromide refrigerating device 4 outside the saturated damp-heat flue gas condensation dehumidifier 2 through a cold water pipe 8, the lithium bromide refrigerating device 4 adopts hot water or steam as a heat source, and the lithium bromide refrigerating device 4 is provided with a heat source outlet/inlet and a circulating cooling water outlet/inlet.
Fan 1 connects gas chamber and chimney 6 through switching station 5, set up flue gas heating heat exchanger 61 in the chimney 6, set up flue gas heat absorption heat exchanger 31 on the flue gas pipeline 3 that complex advances the flue gas port 211 to connect, flue gas heating heat exchanger 61 and flue gas heat absorption heat exchanger 31 pass through circulating line 7 and connect, and set up circulating pump 71 on the circulating line 7, flue gas heating heat exchanger 61 and flue gas heat absorption heat exchanger 31 cooperation circulating line 7, the outer flue gas of accessible is to getting into saturation moist heat flue gas condensation dehumidifier 2 and reducing the temperature in advance, and heat the outer flue gas of arranging and heat saturation moist flue gas and heat up to unsaturated moist flue gas.
The nature condenser pipe 23 outside sets up a plurality of fins 231, and the nature condenser pipe 23 inboard sets up spiral guide vane 232, and fin 231 can increase heat transfer area, and spiral guide vane 232 can pressurize the stroke of flue gas in nature condenser pipe 23, can improve condensation and cooling efficiency.
The flue gas condensation cooling heat exchanger 221 arranged in the upper condensation cavity 22 partially extends into the natural condensation pipe 23, so that the condensation and cooling efficiency can be further improved.
When the colored smoke plume eliminating device of the converter primary dust removal system is used, smoke is discharged from a processing device at the front end, is conveyed through a smoke pipeline 3, passes through the smoke heat absorption heat exchanger 31, can reduce the temperature of the smoke, improves the temperature of heat exchange media in the smoke heat absorption heat exchanger 31, the circulating pipeline 7 and the smoke heating heat exchanger 61, enters the upper condensation cavity 22 through the smoke inlet 211 to reach a first functional area, flows in a vortex flow mode by adhering to the inner wall with the cold water coil 212 and the heat insulation device, and primarily removes a part of fog drops carried in the smoke in the processes of high-speed vortex flow, violent mixing and rotary motion of the smoke; then the flue gas enters the natural condenser pipe 23 again, and reaches the second functional area, the flue gas flows upwards along with the spiral flow deflector 232 arranged on the inner side of the natural condenser pipe 23, the hot and humid air is cooled and condensed by the natural condenser pipe 23 with the fins 231 in a natural cooling mode, the natural condenser pipe 23 with the fins 231 fully utilizes an atmospheric cold source, the natural cooling effect of saturated hot and humid flue gas air is enhanced, the flue gas condensation cooling heat exchanger 221 arranged in the upper condensation cavity 22 partially extends to the natural condenser pipe 23, and the condensation and cooling efficiency is further improved by cold water in the flue gas condensation cooling heat exchanger 221; the flue gas is discharged from the natural condensation pipe 23 and enters the upper condensation cavity 22, namely reaches the third functional area, the flue gas is further forcibly cooled and condensed by cold water in the flue gas condensation cooling heat exchanger 221, the temperature of the flue gas is reduced to be below the dew point, and the water vapor in the saturated damp and hot flue gas is condensed into liquid drops through phase change; after passing through the flue gas condensation cooling heat exchanger 221, the flue gas reaches the position of the demister 222, namely, reaches the third functional zone, and liquid drops carried in the flue gas can be effectively separated and removed through the demister 222, so that the purpose of reducing the water content of the flue gas through condensation is achieved; finally, the moisture content of the flue gas after condensation and dehumidification is reduced, the flue gas enters a chimney 6 after passing through a fan 1 and a switching station 5, then the flue gas reaches a flue gas heating heat exchanger 61, the flue gas is heated by the flue gas heating heat exchanger 61, the saturated wet flue gas is heated until the unsaturated wet flue gas is discharged into the atmosphere from the chimney 6, and therefore the purposes of colored smoke plume treatment and gas pipeline corrosion prevention are achieved, and the temperature of heat exchange media in the flue gas heating heat exchanger 61, the circulating pipeline 7 and the flue gas heat absorption heat exchanger 31 is reduced while the flue gas is heated.
The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made without departing from the basic structure of the invention.
Claims (6)
1. Converter dust pelletizing system colored smoke plume remove device once, its characterized in that: comprises a saturated damp-heat flue gas condensation dehumidifier (2) arranged at the front side of a fan (1) of a converter primary dust removal system, wherein the saturated damp-heat flue gas condensation dehumidifier (2) comprises a lower condensation cavity (21) and an upper condensation cavity (22), the upper condensation cavity (22) is connected with the lower condensation cavity (21) through a plurality of natural condensation pipes (23), one side of the lower condensation cavity (21) is provided with a flue gas inlet (211), the flue gas inlet (211) is connected with a processing device at the front end of the converter primary dust removal system through a flue gas pipeline (3), the outer wall of the lower condensation cavity (21) is provided with a cold water coil (212), the outer walls of the cold water coil (212) and the lower condensation cavity (21) are provided with a heat insulation device, a flue gas condensation cooling heat exchanger (221) and a demister (222) are sequentially arranged in the upper condensation cavity (22) from bottom to top, and the upper end of the upper condensation cavity (22) is provided with a smoke exhaust, the smoke exhaust port (223) is connected with the fan (1) through a smoke pipeline (3), and the cold water coil (212) and the smoke condensation cooling heat exchanger (221) are both connected with the refrigerating device (4) outside the saturated damp and hot smoke condensation dehumidifier (2).
2. The colored smoke plume eliminating device of the primary dust removing system of the converter according to claim 1, wherein: the gas heater is characterized in that the fan (1) is connected with a gas cabinet and a chimney (6) through a switching station (5), a flue gas heating heat exchanger (61) is arranged in the chimney (6), the flue gas heating heat exchanger is matched with a flue gas heat absorption heat exchanger (31) arranged on a flue gas pipeline (3) connected with a flue gas inlet (211), the flue gas heating heat exchanger (61) is connected with the flue gas heat absorption heat exchanger (31) through a circulating pipeline (7), and a circulating pump (71) is arranged on the circulating pipeline (7).
3. The colored smoke plume eliminating device of the primary dust removing system of the converter according to claim 1, wherein: a plurality of fins (231) are arranged on the outer side of the natural condensation pipe (23), and spiral flow deflectors (232) are arranged on the inner side of the natural condensation pipe (23).
4. The colored smoke plume eliminating device of the primary dust removing system of the converter according to claim 1, wherein: the flue gas condensation cooling heat exchanger (221) arranged in the upper condensation cavity (22) partially extends into the natural condensation pipe (23).
5. The colored smoke plume eliminating device of the primary dust removing system of the converter according to claim 1, wherein: the cold water coil (212) and the flue gas condensation cooling heat exchanger (221) are connected with the refrigerating device (4) through a cold water pipe (8).
6. The colored smoke plume elimination device of the converter primary dedusting system of claim 1 or 5, wherein: the refrigerating device (4) is a lithium bromide refrigerating device (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921136554.9U CN210176893U (en) | 2019-07-18 | 2019-07-18 | Colored smoke plume eliminating device of converter primary dust removing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921136554.9U CN210176893U (en) | 2019-07-18 | 2019-07-18 | Colored smoke plume eliminating device of converter primary dust removing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210176893U true CN210176893U (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921136554.9U Withdrawn - After Issue CN210176893U (en) | 2019-07-18 | 2019-07-18 | Colored smoke plume eliminating device of converter primary dust removing system |
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| CN (1) | CN210176893U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195143A (en) * | 2019-07-18 | 2019-09-03 | 无锡红旗除尘设备有限公司 | The coloured plume cancellation element of once dust collection of converter system |
-
2019
- 2019-07-18 CN CN201921136554.9U patent/CN210176893U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195143A (en) * | 2019-07-18 | 2019-09-03 | 无锡红旗除尘设备有限公司 | The coloured plume cancellation element of once dust collection of converter system |
| CN110195143B (en) * | 2019-07-18 | 2024-05-28 | 无锡红旗除尘设备有限公司 | Colored smoke plume eliminating device of primary dust removing system of converter |
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