CN102910842A - Calcium carbide furnace recycled off-gas recycling technology - Google Patents
Calcium carbide furnace recycled off-gas recycling technology Download PDFInfo
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- CN102910842A CN102910842A CN2012104284728A CN201210428472A CN102910842A CN 102910842 A CN102910842 A CN 102910842A CN 2012104284728 A CN2012104284728 A CN 2012104284728A CN 201210428472 A CN201210428472 A CN 201210428472A CN 102910842 A CN102910842 A CN 102910842A
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- calcium carbide
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- carbide furnace
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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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- 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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
A calcium carbide furnace recycled off-gas recycling technology is characterized in that an existing semi-hermetic calcium carbide furnace is modified to a hermetic calcium carbide furnace. The specific modification includes that sealing fillers are additionally arranged at a flange port on a tapered sealing sleeve according to a conducting copper pipe and a water supply suspender and are fixed, an existing furnace cover is modified, ten feed pipes are additionally mounted on three electrodes on the furnace cover, an existing manual feed port is modified to a water supply sealing cover by the central feed pipe, each electrode is provided with three of the feed pipes, and additionally two smoke outlets are mounted. Ten feed bins are arranged between a 16-meter layer and a 22-meter layer of a main plant, an annular cotton tape feeder is arranged in the 22-meter layer, and two weighting sensors are arranged at the lower end of each feed bin. A feed system is arranged at the middle position between two furnaces, besides, a double-sleeve lime kiln is arranged outside the calcium carbide furnace, and calcium carbide furnace off-gas is supplied to the lime kiln for lime kilning through a gas pipeline after being purified by a purification system, or purified off-gas serves as energy for supply by other devices.
Description
Technical field
The present invention relates to the technical field of the calcium carbide stove exhaust recycling of chemical industry, especially a kind of cleaning of off-gas calcined lime technology of utilizing closed type calcium carbide furnace.
Background technology
The exhaust emissions that furnace of calcium carbide production produces can cause detrimentally affect to environment; and lime kilning adopted the multifuel combustion mode originally in addition; the consumption energy is high; production cost is high; in order to take full advantage of Energy resources; save production cost, and reach the environment protection comprehensive regulation, innovate a kind of tail gas of closed type calcium carbide furnace production that utilizes and after purifying treatment, recycle the technology of coming lime kilning.
Summary of the invention
The objective of the invention is the problem for the described proposition of background technology, a kind of technological method that utilizes the cleaning of off-gas calcined lime of closed calcium carbide furnace is provided, the recycling behind the realization tail gas clean-up.
Be closed type calcium carbide furnace at the original furnace of calcium carbide of original equipment basis reconstruction at first, reach technical indicator and the requirement of lime calcining after the recycled offgas of its production is purified, also original multifuel combustion limestone kiln reconstruction is set to gas burning sleeve-type lime kiln.
A kind of furnace of calcium carbide recycled offgas recovery and utilization technology, transforming original semi-hermetic type is closed type calcium carbide furnace, its concrete environment division of transforming is: rise fall of electrodes presses in cover and moves, and has installed lock packing additional according to contact tube and water flowing suspension rod and is fixed at cone-shaped sealed gland upper flange mouth; Original bell repacking, three electrodes on the bell install ten tremie pipes additional, and a tremie pipe at center is that former artificial charging opening is adapted as the water flowing sealing cover, and every electrode installs three tremie pipes additional, install in addition two cover exhanst gas outlets additional; Between 16 meters layers of main body factory building and 22 meters layers, centered by three-phase electrode, arrange ten feed bins, and arrange the endless-belt charging machines at 22 meters layers that each feed bin lower end arranges two LOAD CELLS; Blanking system is in two stove mid-ways, and material shed increases lime and hard coal configuration; Two sleeve-type lime kilns are set outside furnace of calcium carbide in addition, calcium carbide stove exhaust is supplied the limestone kiln lime kilning by gas pipe line after purification system purifies; Perhaps cleaning of off-gas through other device for the oven dry coke, heating boiler or be used for the deep processing of Chemicals.
Adopt the beneficial effect of the technical program to be, realized the recycling of furnace of calcium carbide production cycle tail gas, fully effectively utilize the energy, reduce labour intensity, save production cost, reach the purpose of comprehensive management of environmental protection.
Description of drawings
Fig. 1 is calcium carbide production scheme of the present invention.
Fig. 2 is overall device plane of arrangement figure of the present invention.
Among the figure: between 1-furnace of calcium carbide body of heater, 2-weighing proportioning device, 3-bucket elevator, 4-reversible belt, 5-cooling fragmentation, changes of 6.1-a stove, the change of 6.2-b stove, 7-material shed, 7.1-lime material shed, 7.2-fire coal material shed, 8.1-a refining plant, 8.2-b refining plant, 9-circulating water pool, 10-dram, 11-fly-ash separator, 12-limestone kiln.
Embodiment
Below be that equipment improvement actually operating and technical process among the present invention are specified:
Existing one deck becomes and lacks net taper ring hermetically sealed case with 2 discharging devices and body of heater electrode, stove, and rise fall of electrodes presses in the taper ring seal cartridge and moves, and installs lock packing at cone-shaped sealed gland upper flange mouth additional according to contact tube and water flowing suspension rod and is fixed.The bell that now uses is reequiped, and 3 electrodes install 10 tremie pipe φ 273 additional above the bell, 3 tremie pipes of every electrode, and 1 tremie pipe in center changes original hand-fed mouth into the water flowing sealing cover, installs 3 large dismantled and assembled water flowing sealing cover easy accesses additional.Install 2 cover exhanst gas outlets additional at bell, original 2 flue gas mouths are removed.Between 16 meters layers of main body factory building and 22 meters layers, centered by 3 phase electrodes, arrange 10 annular feed bins.The tremie pipe of 10 annular feed bins is from 16 meters layers and 11 meters layers to the calcium carbide bell.22 meters layers of main body factory building are arranged the endless-belt charging machine, carry out cloth for 10 annular feed bins.Each feed bin lower end is installed two LOAD CELLS and is used for the control material level.Feeding system; At the center of 2 stoves, increase through efficiently rising to the longitudinal belt machine at 25 meters between material shed is reinforced, the longitudinal belt machine is fed to the reversible belt machine, gives respectively 2 furnace of calcium carbide endless-belt charging machine feed.
Technical process:
1, enter with hard coal after the scale hooper weighing, rotary conveyor is to bucket elevator, and bucket elevator is carried to roof, to 1 longitudinal belt machine of material loading, pass through reversible belt again, give respectively feed in 10 feeding chambers, the compound in the feeding chamber adds in the closed type calcium carbide furnace through the material pipe.Lime and carbon material generate calcium carbide and produce furnace gas through the electric energy reacting by heating in furnace of calcium carbide, and calcium carbide is regularly emitted through fire door and entered in the calcium carbide pot, then is transported to the calcium carbide cooling station through casthouse equipment and cools off.The furnace gas that furnace of calcium carbide produces at first enters the water cooler cooling, then enters the dust-removal system dedusting, and the furnace gas after the purification is supplied with the gas burning lime kiln lime kilning through gas pipe line.The flue gas that produces during calcium carbide production is by the dedusting of discharging fume of stokehold smoke discharging dust removing system.Its technological process of production as shown in Figure 1.
2, newly-built calcium carbide stove exhaust purification system is arranged 2 cover exhaust gas purification systems at 2# and 1# furnace of calcium carbide roof both sides; Waste gas utilization lime calcining after the purification or oven dry coke, heating boiler, also can be used for the deep processing of Chemicals; Fully-closed furnace of calcium carbide cigarette temperature is the highest, up to 450 ~ 1000 ℃.
3, purification process is by the high temperature dust furnace gas of furnace of calcium carbide top extraction, and temperature is 500～800 ℃.Through after the cooling of water cold sleeve, about 370～700 ℃, thus the purification system of entering.The natural air cooling device is adopted in the one-level cooling of purification system.The large characteristics of radiant exchange amount significantly reduce flue-gas temperature when utilizing furnace gas high temperature, and through the cooling of water cooler, furnace gas temperature will be lower than 280 ℃.Remove simultaneously part crude particle dust in the furnace gas.Through the gas of the pure qi (oxygen) blower fan air-purifying chamber to sack cleaner, the timing blowback, with the dust of removing in the furnace gas 99%, thus after guaranteeing to enter in the furnace gas of operation the concentration of dust be lower than 20mg/Nm
3
4, the high-effect cooling device of air cooler empirical design.Outer wall at cylindrical shell arranges multichannel cooling tubulation, so that each part of cylinder body outer wall has equal rate of temperature fall.The bottom is provided with settling pocket; Secondary mechanical blowing cooler adopts the speed control by frequency variation blower fan, and chain with the outlet furnace gas temperature.Automatically regulate cold flow, control furnace gas export temperature is about 220 ℃.Pure qi (oxygen) back flushing type dedusting method; Blind controller system: mainly monitor natural air cooling device out temperature, mechanical blowing cooler temperature out, system pressure loss, bag dust collector inlet outlet pressure differential, temperature, total system employing PC control and supervision;
5, off-set facility: i.e. water coolant, pressurized air and nitrogen system; Cooling water system: pure qi (oxygen) chimney water cooling tube; The furnace gas pipeline water cooling tube; Thick gas blower fan, pure qi (oxygen) blower fan; Pneupress system is mainly used in opening or closing Pneumatic butterfly valve, the following equipment of compressed air-feed and valve: thick stack pressure control valve; The furnace gas pipeline pressure controlled valve; The strainer pressure controlled valve.Nitrogen gas supply uses in bag dust collector operation and system shutdown maintenance and critical accident: pipeline blowback protection as important measures of safeguard protection; Bury extending plate conveyer.
Claims (1)
1. furnace of calcium carbide recycled offgas recovery and utilization technology, it is characterized in that: transforming original semi-hermetic type is closed type calcium carbide furnace, its concrete environment division of transforming is: rise fall of electrodes presses in cover and moves, and has installed lock packing additional according to contact tube and water flowing suspension rod and is fixed at cone-shaped sealed gland upper flange mouth; Original bell repacking, three electrodes on the bell install ten tremie pipes additional, and a tremie pipe at center is that former artificial charging opening is adapted as the water flowing sealing cover, and every electrode installs three tremie pipes additional, install in addition two cover exhanst gas outlets additional; Between 16 meters layers of main body factory building and 22 meters layers, centered by three-phase electrode, arrange ten feed bins, and arrange annular strap charging machine at 22 meters layers that each feed bin lower end arranges two LOAD CELLS; Blanking system is in two stove mid-ways, and material shed increases lime and hard coal configuration; Two sleeve-type lime kilns are set outside furnace of calcium carbide in addition, calcium carbide stove exhaust is supplied the limestone kiln lime kilning by gas pipe line after purification system purifies; Perhaps cleaning of off-gas through other device for the oven dry coke, heating boiler or be used for the deep processing of Chemicals.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104284728A CN102910842A (en) | 2012-11-01 | 2012-11-01 | Calcium carbide furnace recycled off-gas recycling technology |
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| CN2012104284728A CN102910842A (en) | 2012-11-01 | 2012-11-01 | Calcium carbide furnace recycled off-gas recycling technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103708745A (en) * | 2014-01-04 | 2014-04-09 | 高静涛 | Connecting adjustment device of double-hearth lime kiln burning calcium carbide furnace tail gas |
| CN112265994A (en) * | 2020-10-23 | 2021-01-26 | 内蒙古君正化工有限责任公司 | Energy-concerving and environment-protective type carbide production system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005254032A (en) * | 2004-03-09 | 2005-09-22 | Meidensha Corp | Method for operating pyrolytic facility and pyrolytic facility |
| CN101625200A (en) * | 2009-07-31 | 2010-01-13 | 巴涌 | Energy-saving intermittent pulse-feeding technology of closed submerged arc furnace |
| CN102627280A (en) * | 2011-07-14 | 2012-08-08 | 西南化工研究设计院 | Method for purifying and concentrating CO from calcium carbide furnace gas |
-
2012
- 2012-11-01 CN CN2012104284728A patent/CN102910842A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005254032A (en) * | 2004-03-09 | 2005-09-22 | Meidensha Corp | Method for operating pyrolytic facility and pyrolytic facility |
| CN101625200A (en) * | 2009-07-31 | 2010-01-13 | 巴涌 | Energy-saving intermittent pulse-feeding technology of closed submerged arc furnace |
| CN102627280A (en) * | 2011-07-14 | 2012-08-08 | 西南化工研究设计院 | Method for purifying and concentrating CO from calcium carbide furnace gas |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103708745A (en) * | 2014-01-04 | 2014-04-09 | 高静涛 | Connecting adjustment device of double-hearth lime kiln burning calcium carbide furnace tail gas |
| CN112265994A (en) * | 2020-10-23 | 2021-01-26 | 内蒙古君正化工有限责任公司 | Energy-concerving and environment-protective type carbide production system |
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Effective date of abandoning: 20130206 |
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