CN105036134A - Calcium carbide furnace and method for preparing calcium carbide - Google Patents
Calcium carbide furnace and method for preparing calcium carbide Download PDFInfo
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- CN105036134A CN105036134A CN201510441133.7A CN201510441133A CN105036134A CN 105036134 A CN105036134 A CN 105036134A CN 201510441133 A CN201510441133 A CN 201510441133A CN 105036134 A CN105036134 A CN 105036134A
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- calcium carbide
- furnace
- spray gun
- oxygen
- production space
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- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 title claims abstract description 204
- 239000005997 Calcium carbide Substances 0.000 title claims abstract description 203
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000007921 spray Substances 0.000 claims abstract description 115
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 76
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 76
- 239000001301 oxygen Substances 0.000 claims abstract description 76
- 238000004519 manufacturing process Methods 0.000 claims abstract description 70
- 239000002817 coal dust Substances 0.000 claims abstract description 66
- 238000002485 combustion reaction Methods 0.000 claims abstract description 9
- 230000004308 accommodation Effects 0.000 claims description 9
- 239000000498 cooling water Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 description 18
- 239000003245 coal Substances 0.000 description 16
- 239000007789 gas Substances 0.000 description 15
- 239000003610 charcoal Substances 0.000 description 12
- 238000010891 electric arc Methods 0.000 description 12
- 230000002829 reductive effect Effects 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 9
- 239000000571 coke Substances 0.000 description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 8
- -1 calcium carbides Chemical class 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 238000010304 firing Methods 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000006722 reduction reaction Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 235000012255 calcium oxide Nutrition 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 241000209094 Oryza Species 0.000 description 3
- 235000007164 Oryza sativa Nutrition 0.000 description 3
- 241001417490 Sillaginidae Species 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 239000012159 carrier gas Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000036284 oxygen consumption Effects 0.000 description 3
- 235000009566 rice Nutrition 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
Landscapes
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses a calcium carbide furnace and a method for preparing calcium carbide. The calcium carbide furnace comprises a furnace body, a plurality of electrodes and a plurality of spray guns. A calcium carbide production space is defined in the furnace body. The electrodes are embedded in the calcium carbide production space through the top wall and/or the side wall of the furnace body and are suitable for providing heat for the calcium carbide production space. The spray guns are embedded in the calcium carbide production space through the top wall and/or the side wall of the furnace body and are suitable for providing coal dust and oxygen for the calcium carbide production space so that heat generated through combustion of the coal dust and the oxygen can be supplied to the calcium carbide production space. Due to the fact that the spray guns are reasonably arranged between the electrodes on the top wall and/or the side wall of the furnace body of the calcium carbide furnace, heat in the calcium carbide furnace is evenly distributed.
Description
Technical field
The present invention relates to field of metallurgy, particularly, relate to a kind of furnace of calcium carbide, and utilize furnace of calcium carbide to prepare the method for calcium carbide.
Background technology
Calcium carbide is the main raw material producing ethene, in the industry in occupation of very consequence, it is that furnace charge is sent into electric furnace by pay-off and tremie pipe by a certain proportion of unslaked lime and blue charcoal (coke) mixing that calcium carbide is produced, electric furnace primary structure comprises body of heater and electrode, electric arc is produced after relying on energising during furnace of calcium carbide work, rely on the heat furnace charge that electric arc is formed, furnace charge is made to reach chemical reaction institute heat requirement, wherein, electric arc send region that high temperature can be applied directly in electric arc working district or molten bath, the position in this region below electrode tip until furnace bottom, traditional furnace of calcium carbide, its structure formation is circular three-phase electrode structure, three electrodes are that equilateral triangle is arranged in furnace interior, outside body of heater is circular, this form furnace of calcium carbide structural disadvantages: stove inside circumference has a lot of electric arc not act on or the place of the non-constant of action effect, i.e. non-molten bath zone, the temperature in these places is made not reach reaction requirement, this region furnace charge just can not or be difficult to react, because heat distribution difference is too large, cause furnace of calcium carbide productivity low, power consumption is high, blue charcoal (coke) consumption is relatively large, cost is high.
Summary of the invention
The present invention is intended at least to solve one of technical problem existed in prior art.For this reason, one object of the present invention is to propose that a kind of furnace heat is evenly distributed, the simple furnace of calcium carbide of structure, and utilize this furnace of calcium carbide to produce calcium carbide, calcium carbide production cost significantly reduces.
Thus, according to an aspect of the present invention, the invention provides a kind of furnace of calcium carbide.According to embodiments of the invention, this furnace of calcium carbide comprises: body of heater, limits calcium carbide production space in described body of heater; Multiple electrode, described multiple electrode is embedded into described calcium carbide production space from the roof of described body of heater and/or sidewall, and is suitable for providing heat to described calcium carbide production space; And multiple spray gun, described multiple spray gun is embedded into described calcium carbide production space from the roof of described body of heater and/or sidewall, and be suitable for supplying coal dust and oxygen in described calcium carbide production space, to make described coal dust and oxygen combustion produce heat to described calcium carbide production space heat supply.
The discovery that contriver is surprised, by rationally arranging spray gun between the roof and the electrode of sidewall of furnace of calcium carbide body of heater, injecting oxygen and coal dust in stove, oxygen and coal dust generation chemical reaction release of heat, heat can be delivered to stove inside circumference has a lot of electric arc not act on or the place of the non-constant of action effect, uniform heat distribution in furnace of calcium carbide; Calcium carbide produce power consumption low, in addition, the coal dust sprayed into can also with calcium carbide generation reduction reaction, thus, blue charcoal (coke) usage quantity decline, calcium carbide production cost is low.
In addition, furnace of calcium carbide according to the above embodiment of the present invention can also have following additional technical characteristic:
According to embodiments of the invention, each in described multiple spray gun includes: housing, limits spatial accommodation in described housing; Coal dust jet pipe, described coal dust jet pipe is arranged in described spatial accommodation; Multiple oxygen spray pipe, described multiple oxygen spray pipe is arranged in described spatial accommodation, and described multiple oxygen spray pipe distributes along the circumference of described coal dust jet pipe; And cooling water pipeline, described cooling water pipeline is arranged on the outer wall of described housing.Thus, utilize this spray gun, oxygen and coal dust can be provided efficiently in furnace of calcium carbide, and the cooling water pipeline of spray gun outer wall can reduce the temperature of spray gun, prevent in the too high spray gun shortening in work-ing life caused of body of heater internal cause temperature.
According to embodiments of the invention, described electrode is inserted into the adjustable length in described calcium carbide production space.Thus, the intubating length of electrode can be adjusted as required, material is fully heated.
According to embodiments of the invention, described housing is formed by copper.Thus, spray gun thermal conductivity is good, good water-cooling effect.
According to embodiments of the invention, described spray gun is inserted into the adjustable length in described calcium carbide production space.Thus, be convenient to spray gun be inserted in the material on top, furnace of calcium carbide molten bath.
According to embodiments of the invention, the spout of described spray gun and the distance of described calcium carbide central axis are the 2/3-5/6 of the radical length of the furnace of calcium carbide at the spout place place of described spray gun.Thus, the oxygen of spray gun ejection and the heat of coal dust firing release have a lot of electric arc not act on stove inside circumference or the place of the non-constant of action effect respectively, ensure that furnace heat is evenly distributed.
According to embodiments of the invention, the angle be embedded between spray gun described calcium carbide production space and described furnace of calcium carbide roof from the roof of described body of heater is 15 ~ 90 degree.Thus, be convenient to spray gun be inserted in the material on top, furnace of calcium carbide molten bath.
According to embodiments of the invention, the angle be embedded between spray gun described calcium carbide production space and described furnace of calcium carbide sidewall from the sidewall of described body of heater is 15 ~ 90 degree.Thus, be convenient to spray gun be inserted in the material on top, furnace of calcium carbide molten bath.
According to another aspect of the invention, the invention provides a kind of method utilizing aforementioned furnace of calcium carbide to prepare calcium carbide.According to embodiments of the invention, the method comprises: added by furnace charge in calcium carbide production space; The described furnace charge in calcium carbide production space described in multiple electrode pair is utilized to heat; And utilize multiple spray gun to supply coal dust and oxygen in described calcium carbide production space, make described coal dust and oxygen combustion, to described calcium carbide production space heat supply, to obtain calcium carbide.
According to embodiments of the invention, utilize method of the present invention produce calcium carbide, calcium carbide produce power consumption low, in addition, the coal dust sprayed into can also with calcium carbide generation reduction reaction, thus, blue charcoal (coke) usage quantity decline, calcium carbide production cost is low.
According to embodiments of the invention, the ratio of described coal dust and described oxygen is: 1 ton of described coal dust: the described oxygen of (350-800) cubic meter.Thus, coal dust and oxygen carry out oxygen debt formula burning, generate carbon monoxide, provide the reducing atmosphere described in calcium carbide production.
Furnace of calcium carbide of the present invention, relative to existing furnace of calcium carbide, at least can have one of following advantages:
(1) furnace heat is evenly distributed.Existing furnace of calcium carbide structure and production technique, the power consumption of ton calcium carbide is about 3100kwh/t. calcium carbide, the high temperature arc light produced by electrode, the region that arc light can not arrive is there is in stove, this region origin of heat mainly relies between furnace charge and conducts heat, and heat transmission is comparatively slow, and thermosteresis is high.The present invention is by arranging spray gun at the top cover of body of heater and/or sidewall, injecting oxygen and coal dust in stove, winding-up process oxygen coal combustion generation heat can be radiated arc light to be difficult to reach position, relatively traditional furnace of calcium carbide, furnace heat distribution is more even, calcium carbide smelting energy consumption is low, and the cycle is short, and the production cost of calcium carbide per ton can reduce by 120 yuan-223 yuan.
(2) utilize furnace of calcium carbide of the present invention to produce calcium carbide, the coal dust that spray gun sprays into can the blue charcoal (or coke) of Substitute For Partial calcium carbide reductive agent, and the consumption of calcium carbide reductive agent reduces, and calcium carbide production cost declines.
(3) process utilizing furnace of calcium carbide of the present invention to produce calcium carbide can combine with shaft kiln directly reduced process, realize duplex to produce, the flue gas that furnace of calcium carbide produces is through dedusting, washing, dehumidifying, compression, desulfurization decarbonization purification, process furnace is heated to 850-1000 DEG C and send shaft furnace, for shaft furnace production provides heat and reductive agent, the flue gas that the furnace of calcium carbide producing 900000 tons of calcium carbides per year produces after treatment, the demand of the reducing gas of the shaft furnace production of 28-36 ten thousand tons of DRI can be met, the investment of coal (Sweet natural gas) reducing gas system processed is seen in saving, the cost of investment of shaft furnace product DRI significantly reduces.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 shows the structural representation in furnace of calcium carbide longitudinal section according to an embodiment of the invention;
Fig. 2 shows the structural representation of spray gun according to an embodiment of the invention;
Fig. 3 shows the plan structure schematic diagram of spray gun according to an embodiment of the invention;
Fig. 4 shows the schema of the method preparing calcium carbide according to an embodiment of the invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, term " longitudinal direction ", " transverse direction ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", the orientation of the instruction such as " end " or position relationship be based on orientation shown in the drawings or position relationship, be only the present invention for convenience of description instead of require that the present invention with specific azimuth configuration and operation, therefore must can not be interpreted as limitation of the present invention.
According to an aspect of the present invention, the invention provides a kind of furnace of calcium carbide.Referring to Fig. 1, furnace of calcium carbide is according to an embodiment of the invention described.
Furnace of calcium carbide according to the embodiment of the present invention comprises: electrode 100, spray gun 200 and body of heater 300, wherein, limits calcium carbide production space in body of heater 300; Multiple electrode 100 is embedded into calcium carbide production space 400 from the roof of body of heater 300 and/or sidewall, and provides heat to this calcium carbide production space; Multiple spray gun 200 is embedded into calcium carbide production space from the roof of body of heater 300 and/or sidewall, and supplies coal dust and oxygen in calcium carbide production space 400, to make coal dust and oxygen combustion produce heat to calcium carbide production space 400 heat supply.
According to embodiments of the invention, by rationally arranging spray gun 200 between the roof and the electrode 100 of sidewall of furnace of calcium carbide body of heater 300, injecting oxygen and coal dust in stove, oxygen and coal dust firing release of heat, heat can be delivered to stove inside circumference has a lot of electric arc not act on or the place of the non-constant of action effect, uniform heat distribution in furnace of calcium carbide, can partly replace electrode heat supply, and it is low that calcium carbide produces power consumption.And the carbon monoxide that oxygen and coal dust firing generate can provide reducing gas for shaft furnace, simultaneously, part charcoal in coal dust and calcium oxide react and generate calcium carbide, reduce the consumption of the blue charcoal (coke) of the higher calcium carbide raw materials for production of conventional price, thus, utilize furnace of calcium carbide of the present invention can low cost, produce calcium carbide efficiently.
With reference to Fig. 2 and 3, according to a particular embodiment of the invention, each spray gun 200 includes: housing 210, and coal dust jet pipe 220, oxygen spray pipe 230 and cooling water pipeline 240 wherein, limit spatial accommodation in housing 210; Coal dust jet pipe 220 is arranged in this spatial accommodation; Multiple oxygen spray pipe 230 is arranged in this spatial accommodation, and oxygen spray pipe 230 distributes along the circumference of coal dust jet pipe 220; Cooling water pipeline 240 is arranged on the outer wall of housing 210.According to embodiments of the invention, coal dust jet pipe 220 in spray gun 200 is connected by pipeline with high pressure coal filler bin, oxygen spray pipe 210 is connected by high pressure oxygen pipeline with oxygen pressing station, the leading portion of spray gun 200 arranges valve, when jetting in stove, pulverized coal channel, oxygen channel and valve open, coal dust/oxygen enters spray gun 200, and at the nozzle of spray gun 200, following chemical reaction occurs:
C+O
2＝CO+Q(1)
A small amount of C+O
2=CO
2+ Q (2)
C+CaO＝CaC
2+CO(3)
Wherein, formula (1) and formula (2) are thermopositive reaction, release heat for heating furnace charge to reduce power consumption.Part charcoal in coal dust and calcium oxide generation reduction reaction, blue charcoal (coke) usage quantity can be reduced, and, burning produces heat smoke after dedusting, washing, dehumidifying, compressor compresses, desulfurization and decarburization, process furnace are heated to 800-1000 DEG C, shaft furnace can be sent into, there is provided heat and reducing gas for shaft kiln directly reduced, thus make full use of the energy, economic benefit is provided.In addition, because calcium carbide in-furnace temperature is very high, the cooling water pipeline 240 of spray gun 200 outer wall can reduce the temperature of spray gun, prevents the too high spray gun shortening in work-ing life caused of temperature in body of heater.
According to some embodiments of the present invention, the number of oxygen spray pipe 210 can experimentally need to adjust, if need reducing gas, then the number of oxygen spray pipe 210 is few, and coal dust carries out oxygen debt burning; If need carbonic acid gas, then the number of oxygen spray pipe 210 is many, and coal dust carries out oxy combustion, and the position relationship of oxygen spray pipe 210 and coal dust jet pipe 220 as shown in Figure 3.
According to some embodiments of the present invention, electrode 100 is inserted into the adjustable length in calcium carbide production space.Thus, can according to the position of material and molten bath, the intubating length of adjustment electrode, makes electrode insert the inside in molten bath but not touch furnace bottom, thus, material is fully heated.
According to a particular embodiment of the invention, the material of housing 210 is copper.Copper thermal conductivity is good, good water-cooling effect, long service life.
According to some embodiments of the present invention, spray gun 200 is inserted into the adjustable length in calcium carbide production space.Thus, spray gun is convenient to insert in the middle part of the material on the top, furnace of calcium carbide molten bath 410 be positioned at bottom calcium carbide production space 400, and do not contact with molten bath 410, the heat of burning is fully heated material, and increase the contact of coal dust and material, promote that coal dust and material reaction generate calcium carbide, thus, reduce the consumption of coke and blue charcoal in calcium carbide production, production cost is low.
According to embodiments of the invention, the spout of described spray gun and the distance of described calcium carbide central axis are the 2/3-5/6 of the radical length of the furnace of calcium carbide at the spout place place of described spray gun.Wherein, radical length refers to and extends radially outward length to the radial line segments crossing with sidewall from medullary ray, and the radical length at spout place place refers to the length of the radial line segments at spout place.Thus, the oxygen of spray gun ejection and the heat of coal dust firing release have a lot of electric arc not act on stove inside circumference or the place of the non-constant of action effect respectively, ensure that furnace heat is evenly distributed.
According to embodiments of the invention, the angle be embedded between spray gun described calcium carbide production space and described furnace of calcium carbide roof from the roof of described body of heater is 15 ~ 90 degree.Thus, be convenient to the angle of the distributing position adjustment spray gun according to material in stove and electrode, ensure that spray gun inserts in the middle part of the material on top, furnace of calcium carbide molten bath, and not with molten bath contact.
According to some embodiments of the present invention, the angle be embedded between spray gun calcium carbide production space and furnace of calcium carbide sidewall from the sidewall of body of heater is 15 ~ 90 degree.Thus, be convenient to spray gun be inserted in the material on top, furnace of calcium carbide molten bath.Thus, be convenient to the angle of the distributing position adjustment spray gun according to material in stove and electrode, ensure that spray gun inserts in the middle part of the material on top, furnace of calcium carbide molten bath, and not with molten bath contact.
According to another aspect of the invention, the invention provides a kind of method utilizing aforementioned furnace of calcium carbide to prepare calcium carbide.With reference to figure 4, according to embodiments of the invention, the method comprises:
S100: furnace charge is added in calcium carbide production space.
S200: utilize the described furnace charge in calcium carbide production space described in multiple electrode pair to heat.
S300: utilize multiple spray gun to supply coal dust and oxygen in described calcium carbide production space, make described coal dust and oxygen combustion, to described calcium carbide production space heat supply, to obtain calcium carbide.
According to embodiments of the invention, utilize method of the present invention produce calcium carbide, the coal dust that spray gun sprays into can with calcium carbide generation reduction reaction, thus blue charcoal (coke) usage quantity declines, and calcium carbide production cost is low, and coal dust firing release amount of heat, it is low that calcium carbide produces power consumption.
According to embodiments of the invention, the ratio of described coal dust and described oxygen is: 1 ton of coal dust: (350-800) cubic meter oxygen, and wherein, oxygen is the oxygen under standard state.Thus, coal dust and oxygen carry out oxygen debt formula burning, generate a large amount of carbon monoxide, make to be in reducing atmosphere in furnace of calcium carbide, promote that the reduction reaction of calcium carbide is carried out, simultaneously, burning produces heat smoke after dedusting, washing, dehumidifying, compressor compresses, desulfurization and decarburization, process furnace are heated to 800-1000 DEG C, can send into shaft furnace, provide heat and reducing gas for shaft kiln directly reduced, thus make full use of the energy, economic benefit is provided.
Below with reference to specific embodiment, the present invention will be described, it should be noted that, these embodiments are only illustrative, and can not be interpreted as limitation of the present invention.
Embodiment 1:
In the present embodiment, the electrode of furnace of calcium carbide is three-phase electrode, electrode inserts bath, and do not touch furnace bottom, electric-arc heating raw material can be produced, the bell of furnace of calcium carbide installs 3 spray guns, wherein, a spray gun is positioned at the center of three-phase electrode, two other electrode is symmetrically distributed in the outside of three-phase electrode, 2/3 radius in the distance furnace of calcium carbide horizontal interface center of circle, coal dust jet pipe in spray gun is connected by pipeline with high pressure coal filler bin, oxygen spray pipe is connected by high pressure oxygen pipeline with oxygen pressing station, water-cooled tube is connected with water pump, the leading portion of spray gun arranges valve, when jetting in stove, pulverized coal channel, oxygen channel and valve open, coal dust/oxygen enters spray gun, coal dust utilizes carrier gas to spray from spray gun, water coolant is lowered the temperature to spray gun at spray gun outer wall.
When calcium carbide furnace charge loads in furnace of calcium carbide, adjustment electrode and spray gun, make the spout of spray gun insert the furnace charge pars intermedia on top, molten bath, the power transmission starting the arc, opens spray gun early gate simultaneously, carries out oxygen coal mixed injection, and winding-up rice coal 130kg/t. calcium carbide, oxygen consumption are 95NM
3/ t. calcium carbide, is heated to 2000-2200 DEG C and smelts by bath temperature.Tradition calcium carbide produces the about 3100kwh/t. calcium carbide of power consumption, and after calcium carbide prepared by use furnace of calcium carbide of the present invention, power consumption is reduced to 2700kwh/t. calcium carbide, production cost reduces by 175 yuan/t. calcium carbide, meanwhile, coal dust and oxygen reaction generate a large amount of CO, make CO exhaust gas volumn increase about 200Nm
3/ t. calcium carbide, total exhaust gas volumn is about 600NM
3/ t, the flue gas that the furnace of calcium carbide producing 900000 tons of calcium carbides per year produces can meet the demand of the reducing gas of the DRI shaft furnace production of annual output 300000 tons substantially.
Embodiment 2
In the present embodiment, the electrode of furnace of calcium carbide is three-phase electrode, electrode inserts bath, and do not touch furnace bottom, electric-arc heating raw material can be produced, the bell of furnace of calcium carbide installs 4 spray guns, wherein, a spray gun is positioned at the center of three-phase electrode, other three electrodes are uniformly distributed in the outside of three-phase electrode, 5/6 radius in the distance furnace of calcium carbide horizontal interface center of circle, coal dust jet pipe in spray gun is connected by pipeline with high pressure coal filler bin, oxygen spray pipe is connected by high pressure oxygen pipeline with oxygen pressing station, water-cooled tube is connected with water pump, the leading portion of spray gun arranges valve, when jetting in stove, pulverized coal channel, oxygen channel and valve open, coal dust/oxygen enters spray gun, coal dust utilizes carrier gas to spray from spray gun, water coolant is lowered the temperature to spray gun at spray gun outer wall.
When calcium carbide furnace charge loads in furnace of calcium carbide, adjustment electrode and spray gun, make the spout of spray gun insert the furnace charge pars intermedia on top, molten bath, the power transmission starting the arc, opens spray gun early gate simultaneously, carries out oxygen coal mixed injection, and winding-up rice coal 200kg/t. calcium carbide, oxygen consumption are 145NM
3/ t. calcium carbide, is heated to 2000-2200 DEG C and smelts by bath temperature.Tradition calcium carbide produces the about 3100kwh/t. calcium carbide of power consumption, and after calcium carbide prepared by use furnace of calcium carbide of the present invention, power consumption is reduced to 2550kwh/t. calcium carbide, production cost reduces by 223 yuan/t. calcium carbide, meanwhile, coal dust and oxygen reaction generate a large amount of CO, make CO exhaust gas volumn increase about 300Nm
3/ t. calcium carbide, total exhaust gas volumn is about 700NM
3/ t, the flue gas that the furnace of calcium carbide producing 900000 tons of calcium carbides per year produces can meet the demand of the reducing gas of direct-reduced iron (DRI) shaft furnace production of annual output 360000 tons substantially.
Embodiment 3
In the present embodiment, the electrode of furnace of calcium carbide is three-phase electrode, electrode inserts bath, and do not touch furnace bottom, electric-arc heating raw material can be produced, the bell of furnace of calcium carbide and sidewall install 4 spray guns altogether, wherein, a spray gun is positioned at the center of three-phase electrode, other three electrodes are uniformly distributed in the horizontal circumference place of Sidewall Height 1/2, coal dust jet pipe in spray gun is connected by pipeline with high pressure coal filler bin, oxygen spray pipe is connected by high pressure oxygen pipeline with oxygen pressing station, water-cooled tube is connected with water pump, the leading portion of spray gun arranges valve, when jetting in stove, pulverized coal channel, oxygen channel and valve open, coal dust/oxygen enters spray gun, coal dust utilizes carrier gas to spray from spray gun, water coolant is lowered the temperature to spray gun at spray gun outer wall.
When calcium carbide furnace charge loads in furnace of calcium carbide, adjustment electrode and spray gun, make the spout of spray gun insert the furnace charge pars intermedia on top, molten bath, the power transmission starting the arc, opens spray gun early gate simultaneously, carries out oxygen coal mixed injection, and winding-up rice coal 200kg/t. calcium carbide, oxygen consumption are 70NM
3/ t. calcium carbide, is heated to 2000-2200 DEG C and smelts by bath temperature.
The power consumption that tradition calcium carbide is produced is approximately 3100kwh/t. calcium carbide, after calcium carbide prepared by use furnace of calcium carbide of the present invention, power consumption is reduced to 2800kwh/t. calcium carbide, relative to traditional calcium carbide production technique, produce calcium carbide per ton, blue charcoal consumption reduces 95kg, production cost reduces by 120 yuan, meanwhile, coal dust and oxygen reaction generate a large amount of CO, make CO exhaust gas volumn increase about 150Nm
3/ t. calcium carbide, total exhaust gas volumn is about 550NM
3/, produce the furnace of calcium carbide of 900,000 tons of calcium carbides per year, the flue gas of generation can meet the demand that annual production is the reducing gas of the DRI shaft furnace production of 280,000 tons substantially.
In the description of this specification sheets, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (10)
1. a furnace of calcium carbide, is characterized in that, comprising:
Body of heater, limits calcium carbide production space in described body of heater;
Multiple electrode, described multiple electrode is embedded into described calcium carbide production space from the roof of described body of heater and/or sidewall, and is suitable for providing heat to described calcium carbide production space; And
Multiple spray gun, described multiple spray gun is embedded into described calcium carbide production space from the roof of described body of heater and/or sidewall, and be suitable for supplying coal dust and oxygen in described calcium carbide production space, to make described coal dust and oxygen combustion produce heat to described calcium carbide production space heat supply.
2. furnace of calcium carbide according to claim 1, is characterized in that, each in described multiple spray gun includes:
Housing, limits spatial accommodation in described housing;
Coal dust jet pipe, described coal dust jet pipe is arranged in described spatial accommodation;
Multiple oxygen spray pipe, described multiple oxygen spray pipe is arranged in described spatial accommodation, and described multiple oxygen spray pipe distributes along the circumference of described coal dust jet pipe; And
Cooling water pipeline, described cooling water pipeline is arranged on the outer wall of described housing.
3. furnace of calcium carbide according to claim 1, is characterized in that, described electrode is inserted into the adjustable length in described calcium carbide production space.
4. furnace of calcium carbide according to claim 3, is characterized in that, described housing is formed by copper.
5. furnace of calcium carbide according to claim 2, is characterized in that, described spray gun is inserted into the adjustable length in described calcium carbide production space.
6. furnace of calcium carbide according to claim 5, is characterized in that, the angle be embedded between described spray gun described calcium carbide production space and described furnace of calcium carbide roof from the roof of described body of heater is 15 ~ 90 degree.
7. furnace of calcium carbide according to claim 5, is characterized in that, the angle be embedded between described spray gun described calcium carbide production space and described furnace of calcium carbide sidewall from the sidewall of described body of heater is 15 ~ 90 degree.
8. furnace of calcium carbide according to claim 5, is characterized in that, the spout of described spray gun and the distance of described calcium carbide central axis are the 2/3-5/6 of the radical length of the furnace of calcium carbide at the spout place place of described spray gun.
9. utilize furnace of calcium carbide described in any one of claim 1-8 to prepare a method for calcium carbide, it is characterized in that, comprising:
Furnace charge is added in calcium carbide production space;
The described furnace charge in calcium carbide production space described in multiple electrode pair is utilized to heat; And
Utilize multiple spray gun to supply coal dust and oxygen in described calcium carbide production space, make described coal dust and oxygen combustion, to described calcium carbide production space heat supply, to obtain calcium carbide.
10. method according to claim 9, is characterized in that, the ratio of described coal dust and described oxygen is: 1 ton of described coal dust: (350-800) cubic meter oxygen.
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| CN105647588A (en) * | 2016-03-17 | 2016-06-08 | 江苏省冶金设计院有限公司 | Calcium carbide furnace and shaft furnace combined system |
| CN105776218A (en) * | 2016-05-10 | 2016-07-20 | 神雾环保技术股份有限公司 | Calcium carbide preparation system and method |
| CN106082225A (en) * | 2016-08-05 | 2016-11-09 | 北京神雾环境能源科技集团股份有限公司 | The production system of a kind of carbide being provided with double shaft furnace and method |
| CN107117619A (en) * | 2017-06-29 | 2017-09-01 | 神雾环保技术股份有限公司 | Furnace of calcium carbide uses the control system and method for blowing oxygen |
| CN107986279A (en) * | 2017-12-22 | 2018-05-04 | 中国科学院上海高等研究院 | A kind of microwave furnace of calcium carbide reactor and prepare the method for calcium carbide using it |
| CN111811254A (en) * | 2020-08-05 | 2020-10-23 | 河南省德耀节能科技股份有限公司 | High-production-efficiency adjustable calcium carbide or ferroalloy production system |
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| CN105647588A (en) * | 2016-03-17 | 2016-06-08 | 江苏省冶金设计院有限公司 | Calcium carbide furnace and shaft furnace combined system |
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| CN107986279A (en) * | 2017-12-22 | 2018-05-04 | 中国科学院上海高等研究院 | A kind of microwave furnace of calcium carbide reactor and prepare the method for calcium carbide using it |
| CN107986279B (en) * | 2017-12-22 | 2023-03-10 | 中国科学院上海高等研究院 | Microwave calcium carbide furnace reactor and method for preparing calcium carbide by using same |
| CN111811254A (en) * | 2020-08-05 | 2020-10-23 | 河南省德耀节能科技股份有限公司 | High-production-efficiency adjustable calcium carbide or ferroalloy production system |
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| CN105036134B (en) | 2018-01-19 |
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