CN204737978U - Converter coal gas processing system - Google Patents
Converter coal gas processing system Download PDFInfo
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- CN204737978U CN204737978U CN201520418617.5U CN201520418617U CN204737978U CN 204737978 U CN204737978 U CN 204737978U CN 201520418617 U CN201520418617 U CN 201520418617U CN 204737978 U CN204737978 U CN 204737978U
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- coal gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The utility model relates to a converter coal gas processing system, include the high temperature coal gas processing section that feeds through in proper order through the coal gas pipeline, once remove dust mechanism, low temperature gas conditioning section, secondary dust removal mechanism, draught fan and switching station, the high temperature coal gas processing section includes high temperature coal gas waste heat recovery mechanism, and high temperature coal gas waste heat recovery mechanism includes saturated steam production structure and the steam heat accumulator that is used for saving saturated steam, low temperature gas conditioning section includes fused salt circulation mechanism, fused salt circulation mechanism include hot melt salt production structure and with the steam superheater of hot melt salt heat transfer, the steam heat accumulator passes through steam pipework and steam superheater intercommunication. But the physics sensible heat of this processing system effective recycling low temperature converter coal gas reduces evaporative cooler's water consumption, can produce superheated steam consecutively.
Description
Technical field
The utility model belongs to metallurgy industry technical field, is specifically related to a kind of coal gas of converter treatment system.
Background technology
Converter gas dry-dedusting system is the purification coal gas flow process extensively adopted in metallurgical industry converter steelmaking process.Converter gas dry-dedusting system mainly comprises gasification cooling flue, evaporative cooler, thick, smart cleaning apparatus, induced draft fan, switching station etc.First gas temperature is reduced to about 850 DEG C by gasification cooling flue by coal gas of converter, again through about evaporative cooler spray cooling to 200 DEG C, then electrostatic or sack cleaner dedusting, then go switching station by induced draft fan, determine to reclaim or emission coal gas according to the CO actual content in coal gas.
In existing dry-dedusting system, the gas temperature of gasification cooling flue outlet is 850 DEG C on the one hand, then enter evaporative cooler water spray and coal gas of converter is quickly cooled to 200 DEG C, physical sensible heat during this not only between coal gas of converter 850 DEG C ~ 200 DEG C is not used, and also wastes a large amount of water coolants; On the other hand, due to operations such as converter needs are reinforced, hot metal charging, oxygen blast, tappings, the generation of coal gas of converter is discontinuous, gas flow is interrupted, therefore in coal gas UTILIZATION OF VESIDUAL HEAT IN process, the generation of steam is also discontinuous, and gasification cooling flue boiler circuit can only produce saturation steam, can not produce superheated vapour, the quality of steam is not high, and the use range of steam is restricted.
Therefore be necessary to design a kind of coal gas of converter treatment system, to overcome the problems referred to above.
Utility model content
The purpose of this utility model is the defect overcoming prior art, provides a kind of coal gas of converter treatment system, the physical sensible heat in recyclable more coal gas of converter, simultaneously continuable production superheated vapour.
The utility model is achieved in that
The utility model provides a kind of coal gas of converter treatment system, comprise be communicated with successively by gaspipe line coal gas of high temperature processing section, one-time dedusting mechanism, low temperature coal gas processing section, final dusting mechanism, induced draft fan and switching station; Described coal gas of high temperature processing section comprises coal gas of high temperature waste heat recovering mechanism, and described coal gas of high temperature waste heat recovering mechanism comprises saturation steam production structure and the steam accumulator for storing saturation steam; Described low temperature coal gas processing section comprises fused salt cycling mechanism, and described fused salt cycling mechanism comprises hot melt salt production structure and the vapor superheater with hot fused salt heat exchanging, and described steam accumulator is communicated with described vapor superheater by vapour line.
Further, described hot melt salt production structure comprises molten salt heater, and described molten salt heater comprises gas chamber, and described gas chamber is provided with gas entry and gas exit, described gas entry and described one-time dedusting mechanism connection, described gas exit and described final dusting mechanism connection; Described vapor superheater comprises sweating room, and described sweating room is communicated with described steam accumulator by vapour line; Described fused salt cycling mechanism also comprises fused salt circulation loop, and described fused salt circulation loop is each passed through described gas chamber and described sweating room.
Further, described fused salt circulation loop comprises the hot molten salt pipeline of heat supply fused salt circulation and the cold molten salt pipeline of cooling fused salt circulation, and described hot molten salt pipeline is provided with hot melt salt cellar, and described cold molten salt pipeline is provided with sloppy heat salt cellar.
Further, the hot molten salt pipeline between described hot melt salt cellar and described sweating room is provided with hot melt salt pump, and the cold molten salt pipeline between described sloppy heat salt cellar and described gas chamber is provided with sloppy heat salt pump.
Further, described fused salt circulation loop is positioned at all snakelike layout of pipeline of described gas chamber and described sweating room.。
Further, the temperature of described hot melt salt is 300 ~ 500 DEG C, and described vapor superheater comprises superheated vapour outlet, and the temperature of superheated vapour is 250 ~ 450 DEG C.
Further, described saturation steam production structure comprises gasification cooling flue and drum, and described gasification cooling flue two ends export with coal gas of converter and described one-time dedusting mechanism connection respectively; Cooling water pipeline is provided with in described gasification cooling flue wall, described cooling water pipeline is provided with cooling water inlet and pneumatic outlet, described drum is provided with gas inlet, cooling water outlet and saturation steam outlet, described cooling water inlet is communicated with described cooling water outlet, described pneumatic outlet is communicated with described gas inlet, and described saturation steam outlet is communicated with described steam accumulator.
Further, the connecting water pipe between described cooling water outlet and described cooling water inlet is provided with recycle pump.
Further, described coal gas of high temperature processing section also comprises evaporative cooler, and described evaporative cooler is located between described gasification cooling flue and described one-time dedusting mechanism.
Further, described one-time dedusting mechanism comprises rough cleaner, and described rough cleaner is gravitational precipitator, centrifugal deduster or inertial dust separator; Described final dusting mechanism comprises smart fly-ash separator, and described smart fly-ash separator is sack cleaner, electrostatic precipitator or Ceramic dust collector.
The utility model has following beneficial effect: the heat being reclaimed high temperature coal gas of converter by gasification cooling flue, is reclaimed the heat of low temperature coal gas of converter by fused salt cycling mechanism, can the physical sensible heat of efficient recovery low temperature coal gas of converter, and utilization rate of waste heat is high.Owing to adding the waste heat recovery of low temperature coal gas of converter, therefore can reduce the cooling extent of coal gas of converter in evaporative cooler, thus the water loss of evaporative cooler significantly reduces.In vapor superheater, saturation steam is heated as superheated vapour by hot melt salt, and hot melt salt and saturation steam can store respectively, therefore produce superheated vapour serially, by being interrupted oxygen blown impact, can not facilitate the use of follow-up steam user.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the coal gas of converter treatment system that Fig. 1 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope of the utility model protection.
Embodiment one
As Fig. 1, the present embodiment provides a kind of coal gas of converter treatment process, comprises the following steps:
ST1: enter gasification cooling flue 1 from converter coal gas of high temperature out, with water coolant heat exchange in described gasification cooling flue 1, described coal gas of high temperature is cooled to 800 ~ 900 DEG C, and described water coolant is added the saturation steam of thermogenesis 170 ~ 250 DEG C, and described saturation steam enters steam accumulator 15 and stores.Wherein, in the wall of gasification cooling flue 1, cooling water pipeline is set, this cooling water pipeline and drum 3 are connected to form cooling water recirculation system, that is: described cooling water pipeline is provided with cooling water inlet and pneumatic outlet, described drum 3 comprises gas inlet, cooling water outlet and saturation steam outlet, described cooling water inlet is communicated with described cooling water outlet, and described pneumatic outlet is communicated with described gas inlet, and described saturation steam outlet is communicated with steam accumulator 15.Water coolant in drum 3 enters cooling water pipeline, and the coal gas of high temperature be vaporized in cooling stack 1 is heated into steam water interface, and this steam water interface enters in drum 3, and the saturation steam in drum 3 enters in steam accumulator 15 through pipeline and stores.
ST2: enter evaporative cooler 2 from gasification cooling flue 1 coal gas out, spray water and go out except the kindling material in coal gas, and make coal gas be cooled to 400 ~ 600 DEG C further in described evaporative cooler 2, forms low temperature coal gas.Spray water in evaporative cooler 2 and go out except the kindling material in coal gas, ensure that the safe operation of system.Owing to only coal gas need be cooled to 400 ~ 600 DEG C in evaporative cooler 2, therefore reduce the injection flow rate in evaporative cooler 2.
ST3: described low temperature coal gas enters one-time dedusting mechanism and carries out thick dedusting.
ST4: the described low temperature coal gas after thick dedusting enters molten salt heater 6, and with cold fused salt heat exchanging in described molten salt heater 6, described low temperature coal gas is cooled to less than 200 DEG C, and described sloppy heat salt is heated as the hot melt salt of 300 ~ 500 DEG C; Described hot melt salt is stored by hot melt salt cellar 12, and can be transported in vapor superheater 14 with described saturation steam and carry out heat exchange, described hot melt salt cooling becomes sloppy heat salt and is back in described molten salt heater 6, and described saturation steam is heated as the superheated vapour of 250 ~ 450 DEG C.Wherein, described molten salt heater 6 comprises gas chamber, and described gas chamber is provided with gas entry and gas exit, this gas entry and one-time dedusting mechanism connection, this gas exit and final dusting mechanism connection; Described vapor superheater 14 comprises sweating room, and described sweating room is communicated with described steam accumulator 15 by vapour line; Described gas chamber is connected by fused salt circulation loop with described sweating room, and described fused salt circulation loop is each passed through described gas chamber and described sweating room.Described fused salt circulation loop comprises the hot molten salt pipeline of heat supply fused salt circulation and the cold molten salt pipeline of cooling fused salt circulation, and hot melt salt cellar 12 is located on described hot molten salt pipeline, and described cold molten salt pipeline is provided with sloppy heat salt cellar 10.Hot molten salt pipeline between described hot melt salt cellar 12 and described sweating room is provided with hot melt salt pump 13, and hot melt salt pump 13 imports in vapor superheater 14 for the hot melt salt will stored in hot melt salt cellar 12; Cold molten salt pipeline between described sloppy heat salt cellar 10 and described gas chamber is provided with sloppy heat salt pump 10, and sloppy heat salt pump 10 imports in molten salt heater 6 for the sloppy heat salt will stored in sloppy heat salt cellar 10.
ST5: enter final dusting mechanism from molten salt heater 6 coal gas out and carry out smart dedusting, the coal gas after smart dedusting is selected to diffuse or reclaim according to its carbon monoxide content height.Coal gas after final dusting enters switching station 9 through induced draft fan 8, and switching station 9 is selected to diffuse or reclaim according to the height of carbon monoxide content in coal gas.
The present embodiment has following beneficial effect: the heat being reclaimed high temperature coal gas of converter by gasification cooling flue 1, is reclaimed the heat of low temperature coal gas of converter by fused salt cycling mechanism, can the physical sensible heat of efficient recovery low temperature coal gas of converter, and utilization rate of waste heat is high.Owing to adding the waste heat recovery of low temperature coal gas of converter, therefore can reduce the cooling extent of coal gas of converter in evaporative cooler 2, thus the water loss of evaporative cooler 2 significantly reduces.In vapor superheater 14, saturation steam is heated as superheated vapour by hot melt salt, and hot melt salt and saturation steam can store respectively, therefore produce superheated vapour serially, can not by being interrupted oxygen blown impact.
Embodiment two
As Fig. 1, the present embodiment provides a kind of coal gas of converter treatment system, comprise be communicated with successively by gaspipe line coal gas of high temperature processing section, one-time dedusting mechanism, low temperature coal gas processing section, final dusting mechanism, induced draft fan 8 and switching station 9.
Described coal gas of high temperature processing section comprises coal gas of high temperature waste heat recovering mechanism, and described coal gas of high temperature waste heat recovering mechanism comprises saturation steam production structure and the steam accumulator 15 for storing saturation steam.Wherein, described saturation steam production structure comprises gasification cooling flue 1 and drum 3, and described gasification cooling flue 1 two ends export with coal gas of converter and described one-time dedusting mechanism connection respectively; Cooling water pipeline is provided with in described gasification cooling flue 1 wall, described cooling water pipeline is provided with cooling water inlet and pneumatic outlet, described drum 3 is provided with gas inlet, cooling water outlet and saturation steam outlet, described cooling water inlet is communicated with described cooling water outlet, described pneumatic outlet is communicated with described gas inlet, and described saturation steam outlet is communicated with steam accumulator 15.As required, the connecting water pipe between the cooling water outlet and the cooling water inlet of cooling water pipeline of drum 3 can arrange recycle pump 4, the cycle efficiency of water coolant is provided.Water coolant in drum 3 enters cooling water pipeline, and the coal gas of high temperature be vaporized in cooling stack 1 is heated into steam water interface, and this steam water interface enters in drum 3, and the saturation steam in drum 3 enters in steam accumulator 15 through pipeline and stores.The temperature of described saturation steam is at 170 ~ 250 DEG C, and after gasification cooling flue 1, coal gas of high temperature temperature is down to 800 ~ 900 DEG C.
Further, described coal gas of high temperature processing section also comprises evaporative cooler 2, and described evaporative cooler 2 is located between described gasification cooling flue 1 and described one-time dedusting mechanism.The coal gas cooled through gasification cooling flue 1 enters in evaporative cooler 2, sprays water and goes out except the kindling material in coal gas, and make coal gas be cooled to 400 ~ 600 DEG C further in described evaporative cooler 2, forms low temperature coal gas.Spray water in evaporative cooler 2 and go out except the kindling material in coal gas, ensure that the safe operation of system.Owing to only coal gas need be cooled to 400 ~ 600 DEG C in evaporative cooler 2, therefore reduce the injection flow rate in evaporative cooler 2.
As Fig. 1, described low temperature coal gas processing section comprises fused salt cycling mechanism, and described fused salt cycling mechanism comprises hot melt salt production structure and the vapor superheater 14 with hot fused salt heat exchanging, and described steam accumulator 15 is communicated with described vapor superheater 14 by vapour line.Described hot melt salt production structure comprises molten salt heater 6, described molten salt heater 6 comprises gas chamber, described gas chamber is provided with gas entry and gas exit, described gas entry and described one-time dedusting mechanism connection, described gas exit and described final dusting mechanism connection; Described vapor superheater 14 comprises sweating room, and described sweating room is communicated with described steam accumulator 15 by vapour line; Described fused salt cycling mechanism also comprises fused salt circulation loop, and described fused salt circulation loop is each passed through described gas chamber and described sweating room.Namely molten salt heater 6 is arranged on coal gas flow pipe, is absorbed the waste heat of low temperature coal gas by the heat transfer of fused salt and coal gas, and the hot melt salt after heating for heating saturation steam, thus produces superheated vapour.Wherein, the temperature of the hot melt salt of generation at 300 ~ 500 DEG C, from molten salt heater 6 gas temperature out below 200 DEG C; The temperature of superheated vapour is at 250 ~ 450 DEG C.Be positioned at all snakelike layout of molten salt pipeline of described gas chamber and described sweating room, the contact area of molten salt pipeline and coal gas or steam can be increased, improve heat transfer efficiency.Described vapor superheater 14 comprises superheated vapour outlet, and superheated vapour outlet is connected with steam user, and the quality of steam is high, applied widely.If follow-up steam user is turbine driven set, the superheated vapour that so temperature and pressure significantly raises can improve the thermo-efficiency of turbine driven set greatly, can also improve the inner carbonated drink situation of steam turbine simultaneously, reduce the corrosion of steam turbine afterbody blade.
Further, described fused salt circulation loop comprises the hot molten salt pipeline of heat supply fused salt circulation and the cold molten salt pipeline of cooling fused salt circulation, and described hot molten salt pipeline is provided with hot melt salt cellar 12, and described cold molten salt pipeline is provided with sloppy heat salt cellar 10.Hot molten salt pipeline between described hot melt salt cellar 12 and described sweating room is provided with hot melt salt pump 13, and the cold molten salt pipeline between described sloppy heat salt cellar 10 and described gas chamber is provided with sloppy heat salt pump 10.Hot melt salt cellar 12 is set, can store heat fused salt, be interrupted in oxygen blown process, when not oxygen blast, the hot melt salt stored by hot melt salt cellar 12 and the interior saturation steam stored of steam accumulator 15 are directed in vapor superheater 14, can realize the continuous seepage of superheated vapour, can not by being interrupted oxygen blown impact.
In the present embodiment, described one-time dedusting mechanism comprises rough cleaner 5, and described rough cleaner 5 is gravitational precipitator, centrifugal deduster or inertial dust separator.Described final dusting mechanism comprises smart fly-ash separator 7, and described smart fly-ash separator 7 is sack cleaner, electrostatic precipitator or Ceramic dust collector.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a coal gas of converter treatment system, is characterized in that: comprise be communicated with successively by gaspipe line coal gas of high temperature processing section, one-time dedusting mechanism, low temperature coal gas processing section, final dusting mechanism, induced draft fan and switching station; Described coal gas of high temperature processing section comprises coal gas of high temperature waste heat recovering mechanism, and described coal gas of high temperature waste heat recovering mechanism comprises saturation steam production structure and the steam accumulator for storing saturation steam; Described low temperature coal gas processing section comprises fused salt cycling mechanism, and described fused salt cycling mechanism comprises hot melt salt production structure and the vapor superheater with hot fused salt heat exchanging, and described steam accumulator is communicated with described vapor superheater by vapour line.
2. coal gas of converter treatment system according to claim 1, it is characterized in that: described hot melt salt production structure comprises molten salt heater, described molten salt heater has gas chamber, described gas chamber is provided with gas entry and gas exit, described gas entry and described one-time dedusting mechanism connection, described gas exit and described final dusting mechanism connection; Described vapor superheater has sweating room, and described sweating room is communicated with described steam accumulator by vapour line; Described fused salt cycling mechanism also comprises fused salt circulation loop, and described fused salt circulation loop is each passed through described gas chamber and described sweating room.
3. coal gas of converter treatment system according to claim 2, it is characterized in that: described fused salt circulation loop comprises the hot molten salt pipeline of heat supply fused salt circulation and the cold molten salt pipeline of cooling fused salt circulation, described hot molten salt pipeline is provided with hot melt salt cellar, and described cold molten salt pipeline is provided with sloppy heat salt cellar.
4. coal gas of converter treatment system according to claim 3, it is characterized in that: the hot molten salt pipeline between described hot melt salt cellar and described sweating room is provided with hot melt salt pump, the cold molten salt pipeline between described sloppy heat salt cellar and described gas chamber is provided with sloppy heat salt pump.
5. coal gas of converter treatment system according to claim 2, is characterized in that: described fused salt circulation loop is positioned at all snakelike layout of pipeline of described gas chamber and described sweating room.
6. coal gas of converter treatment system according to any one of claim 1 to 5, is characterized in that: the temperature of described hot melt salt is 300 ~ 500 DEG C, and described vapor superheater comprises superheated vapour outlet, and the temperature of superheated vapour is 250 ~ 450 DEG C.
7. coal gas of converter treatment system according to any one of claim 1 to 5, it is characterized in that: described saturation steam production structure comprises gasification cooling flue and drum, described gasification cooling flue two ends export with coal gas of converter and described one-time dedusting mechanism connection respectively; Cooling water pipeline is provided with in described gasification cooling flue wall, described cooling water pipeline is provided with cooling water inlet and pneumatic outlet, described drum is provided with gas inlet, cooling water outlet and saturation steam outlet, described cooling water inlet is communicated with described cooling water outlet, described pneumatic outlet is communicated with described gas inlet, and described saturation steam outlet is communicated with described steam accumulator.
8. coal gas of converter treatment system according to claim 7, is characterized in that: the connecting water pipe between described cooling water outlet and described cooling water inlet is provided with recycle pump.
9. coal gas of converter treatment system according to claim 7, is characterized in that: described coal gas of high temperature processing section also comprises evaporative cooler, and described evaporative cooler is located between described gasification cooling flue and described one-time dedusting mechanism.
10. coal gas of converter treatment system according to claim 1, is characterized in that: described one-time dedusting mechanism comprises rough cleaner, and described rough cleaner is gravitational precipitator, centrifugal deduster or inertial dust separator; Described final dusting mechanism comprises smart fly-ash separator, and described smart fly-ash separator is sack cleaner, electrostatic precipitator or Ceramic dust collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520418617.5U CN204737978U (en) | 2015-06-17 | 2015-06-17 | Converter coal gas processing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520418617.5U CN204737978U (en) | 2015-06-17 | 2015-06-17 | Converter coal gas processing system |
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| CN204737978U true CN204737978U (en) | 2015-11-04 |
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| CN201520418617.5U Withdrawn - After Issue CN204737978U (en) | 2015-06-17 | 2015-06-17 | Converter coal gas processing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911296A (en) * | 2015-06-17 | 2015-09-16 | 中冶南方工程技术有限公司 | Converter coal gas treatment method and system |
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2015
- 2015-06-17 CN CN201520418617.5U patent/CN204737978U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911296A (en) * | 2015-06-17 | 2015-09-16 | 中冶南方工程技术有限公司 | Converter coal gas treatment method and system |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20151104 Effective date of abandoning: 20160921 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |