CN106430208A - Method and system for producing calcium carbide by utilizing limestone - Google Patents
Method and system for producing calcium carbide by utilizing limestone Download PDFInfo
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- CN106430208A CN106430208A CN201611167705.8A CN201611167705A CN106430208A CN 106430208 A CN106430208 A CN 106430208A CN 201611167705 A CN201611167705 A CN 201611167705A CN 106430208 A CN106430208 A CN 106430208A
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- 235000019738 Limestone Nutrition 0.000 title claims abstract description 81
- 239000006028 limestone Substances 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000005997 Calcium carbide Substances 0.000 title claims abstract description 17
- 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 17
- 238000000197 pyrolysis Methods 0.000 claims abstract description 37
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 239000003245 coal Substances 0.000 claims abstract description 20
- 238000001354 calcination Methods 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 238000005453 pelletization Methods 0.000 claims description 51
- 239000000463 material Substances 0.000 claims description 34
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 24
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 24
- 239000004571 lime Substances 0.000 claims description 24
- 239000000571 coke Substances 0.000 claims description 14
- 238000009413 insulation Methods 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 14
- 239000011230 binding agent Substances 0.000 claims description 13
- 230000001698 pyrogenic effect Effects 0.000 claims description 10
- 238000007233 catalytic pyrolysis Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000003723 Smelting Methods 0.000 claims description 5
- 238000009825 accumulation Methods 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 4
- 241001417490 Sillaginidae Species 0.000 claims description 3
- 241001062472 Stokellia anisodon Species 0.000 claims description 2
- 238000001727 in vivo Methods 0.000 claims description 2
- 238000002203 pretreatment Methods 0.000 claims description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract description 18
- 235000012255 calcium oxide Nutrition 0.000 abstract description 8
- 239000000292 calcium oxide Substances 0.000 abstract description 8
- 238000000465 moulding Methods 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract description 3
- 239000008188 pellet Substances 0.000 abstract 7
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 239000002355 dual-layer Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 36
- 238000004519 manufacturing process Methods 0.000 description 19
- 238000004939 coking Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 239000002817 coal dust Substances 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 239000011285 coke tar Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/08—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form in the form of briquettes, lumps and the like
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/18—Modifying the properties of the distillation gases in the oven
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The invention relates to a method and system for producing calcium carbide by utilizing limestone. The method comprises the following steps: molding mixture of finely powdered medium and low-rank coal, limestone and adhesive into pellets; layering and pyrolyzing the pellets and massive limestone in a dual-layer revolving bed, putting the pellets below the massive limestone, calcining the massive limestone while catalytically cracking raw gas generated by pyrolyzing the pellets in the lower layer, and calcining and pyrolyzing to obtain high-temperature massive quicklime, oil-gas products and high-temperature active pellets; and insulating the high-temperature massive quicklime and high-temperature active pellets, and feeding into a calcium carbide melting furnace to generate calcium carbide and calcium carbide furnace gas. According to the method and system for producing calcium carbide by utilizing limestone, powdered limestone can be sufficiently utilized, and pyrolysis gas generated by pyrolyzing pellets is catalytically cracked and filtered while the massive limestone is used as a raw material, so that the caking problem of radiant tubes can be solved.
Description
Technical field
The invention mainly relates to the production field of carbide, and in particular to a kind of utilization limestone produces the method for carbide and is
System.
Background technology
Carbide, was once described as mainly for the production of acetylene and ethynylation chemical product as a kind of important industrial chemicals
" mother of organic synthesiss industry ".Consider from National energy distribution, " rich coal, oil-poor, few gas " is the typical case of China's energy resource structure
Feature, coal is the main energy sources of China, accounts for the 70% of primary energy, and therefore, carbide production is anticipated for Industrial Economic Development
Justice is great.
At present, the raw material that carbide is smelted is based on quality block semi-coke and lump lime.Not only cost of material height, and block
Shape semi-coke is little with the contact area of quick lime, and rate of heat transfer is slow, causes reaction temperature height, power consumption height.And, waving in coal
Send out a point major part to be discharged in air in the form of waste gas, dust, bring serious environmental problem.Therefore, current carbide life
Production. art has the drawbacks of high temperature, highly energy-consuming, high pollution.
Also some use in powdery low-order coal and powdery quick lime as the technology of raw material production carbide, but the technology
In, all quick lime are both needed to be obtained through limestone calcination and broken process, waste substantial amounts of energy and power, and in pyrolysis
During, being pyrolyzed the raw coke oven gas for producing includes macromole tar, while carrying dust in raw coke oven gas, makes pyrolysis oven spoke easily occur
Penetrate the problem of pipe coking.
And have substantial amounts of waste heat to produce during carbide is generated, energy has been wasted if not being used
Amount.
For easily there is radial canal knot in the traditional carbide production technology highly energy-consuming of solution, high pollution, poor benefit, pyrolytic process
The shortcomings of problem of Jiao, both the raw material that block limestone is produced, carbide can be possible with as carbide by the use of powder limestone
Production technology is further improved.
Content of the invention
For the problems referred to above, the present invention is intended to provide a kind of utilization limestone produces the method and system of carbide, the system
And the purpose of method is to solve traditional carbide production technology highly energy-consuming, high pollution, poor benefit, radiation easily occur in pyrolytic process
The problem of pipe coking, both can be possible with, by the use of powder limestone, the raw material that block limestone is produced as carbide.
The present invention is intended to provide a kind of method that utilization limestone produces carbide, methods described includes step：
The mixed material of the middle low-order coal, limestone and binding agent of fine-powdered is shaped to pelletizing；
The pelletizing and block limestone are sent into the layering pyrolysis of Double layer rotating bed, the pelletizing is placed in the bulk Calx
The lower floor of stone so that the bulk limestone raw coke oven gas that pelletizing pyrolysis described in catalytic pyrolysiss lower floor is produced while calcining,
Fumed pyrogenic obtains high temperature lump lime, oil gas product and high temperature active pelletizing；
The high temperature lump lime is conveyed into carbide smelting furnace with the insulation of high temperature active pelletizing, generates carbide and carbide
Furnace gas.
Above-mentioned method, methods described can also further include pre-treatment step：By the middle low-order coal, limestone and viscous
Knot agent is all crushed to the fine-powdered of 50 mesh of granularity ＜.
Above-mentioned method, the weight content of the binding agent is the 1.0%-10.0% of the mixed material.
Above-mentioned method, the limestone of the fine-powdered is 0.7-1.1 with the addition mass ratio of the middle low-order coal:1.
Above-mentioned method, the addition of the bulk limestone is the 0.7-1.1 that the middle low-order coal adds quality:1.
Above-mentioned method, the pyrolysis temperature of the bulk limestone is 900-1000 DEG C；The pyrolysis temperature of the pelletizing is
750-900℃.
The present invention also provides a kind of system for realizing above-mentioned utilization limestone production carbide method, and the system includes mixing
Forming unit, fumed pyrogenic unit, carbide smelt unit and heat-insulation conveying device, wherein
The fumed pyrogenic unit is double-deck no heat carrier heat accumulating type rotating bed, enters including pelletizing entrance, block limestone
Mouth, oil gas vent, the outlet of hot mixture material；The pelletizing entrance is connected with the outlet of the mixed-forming unit；The height
Warm mixed material outlet is connected with the entrance of the heat-insulation conveying device；
The bilayer no heat carrier heat accumulating type rotating bed is originally sequentially provided with upper strata radial canal, upper layer material in vivo from top to bottom
Plate, lower floor's flitch, lower floor's radial canal, are provided with material hole on the upper strata flitch, for the waste coal for producing pelletizing pyrolysis
Gas passes through；
It is closed type calcium carbide furnace that the carbide smelts unit, be provided with high temperature lump lime and high temperature active pelletizing entrance,
Calcium carbide furnace gas outlet and carbide outlet；The high temperature lump lime and high temperature active pelletizing entrance and the heat-insulation conveying device
Outlet be connected.
Above-mentioned system, the upper strata radial canal and lower floor's radial canal are in the double-deck no heat carrier heat accumulating type rotation
Bed is in staggered distribution on body height direction, and the upper strata radial canal all includes multiple parallel and uniform point with lower floor's radial canal
The heat accumulation type radiant tube of cloth.
Above-mentioned system, is additionally provided with feed material preparation units before the mixed-forming unit, it include raw material breaker,
Middle warehouse and conveyer device；The raw material breaker is connected with middle warehouse and conveyer device successively.
Above-mentioned system, the mixed-forming unit includes mixing device and press ball device；The entrance of the mixing device
It is connected with the raw material conveying device of the feed material preparation units；The outlet of the entrance of the press ball device and the mixing device
It is connected.
The invention provides a kind of reasonable utilization powdered lime stone and block limestone produce the method and system of carbide, no
Powder limestone can be only made full use of, and block limestone is caused while as raw material, can be pyrolyzed generation to pelletizing
Pyrolysis gas carry out catalytic pyrolysiss and filtration, solve the problems, such as radial canal coking.Furthermore, this technique is directly with limestone as original
Material, completes calcining in pelletizing pyrolytic process, eliminates the limekiln calcination process that must arrange for quick lime is obtained, and reduces
Installation cost and calcinating consumption.
Description of the drawings
Fig. 1 is the flow sheet of the utilization limestone production carbide of the embodiment of the present invention；
Fig. 2 is the system structure diagram of the utilization limestone production carbide of the embodiment of the present invention.
Specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in more details, so as to energy
The advantage of the solution of the present invention and various aspects is enough more fully understood.However, specific embodiments described below and enforcement
Example is only descriptive purpose, rather than limitation of the present invention.
The present invention provides the method and system that a kind of utilization powdered lime stone and block limestone produce carbide, can not only fill
Dividing and powder being utilized, and block is caused while as raw material, can be pyrolyzed, to pelletizing, the pyrolysis gas for producing carry out catalytic pyrolysiss
And filtration, solve the problems, such as radial canal coking.
The method for carbide being produced using powdered lime stone and block limestone, as shown in figure 1, comprise the following steps：
The first step：By pretreatment unit, i.e., pass through breaker respectively by middle low-order coal, powdered lime stone and binding agent
It is crushed to 50 mesh of granularity ＜；
Second step：Mixed-forming, after obtaining required powder raw material, is carried out after pretreatment after the powder for obtaining is sieved
Mixed material is mixed to get, and compressing, obtain pelletizing；
Wherein, the addition of the binding agent is the 1.0wt%-10.0wt% of mixed material；
The limestone is 0.7-1.1 with the addition mass ratio of coal dust:1；
3rd step：Fumed pyrogenic, become pelletizing and block limestone is simultaneously introduced Double layer rotating bed and is pyrolyzed, and is obtained
Oil gas product, high temperature active pelletizing and high temperature lump lime；
During pyrolysis, the bulk limestone is placed in the upper strata of the Double layer rotating bed, and pelletizing is placed in the Double layer rotating bed
Lower floor；
The addition of the bulk limestone is the 0.7-1.1 that initial coal dust adds quality:1；
The heating-up temperature of the upper strata radial canal is 900-1000 DEG C；
The heating-up temperature of lower floor's radial canal is 750-900 DEG C；
4th step：Carbide is smelted, and after pyrolysis, the high temperature lump lime of gained is with high temperature active pelletizing directly by insulation
Conveyer device sends into furnace of calcium carbide, production carbide and calcium carbide furnace gas, and which takes full advantage of the sensible heat of fumed pyrogenic remaining solid, reduces
The power consumption of carbide production；
The heat-insulation conveying device includes sealing thermal insulation tank or sealing thermal insulation carrier bar；
The production temperature of the carbide is 1850-2100 DEG C.
In above-mentioned steps, the first step is not required step, can be set according to supplied materials situation.
Meanwhile, the utilization powdered lime stone that the present invention is provided and the system of block limestone production carbide are as described below.
As shown in Fig. 2 system for producing calcium carbide of the present invention include feed material preparation units 1, mixed-forming unit 2,
Fumed pyrogenic unit 3, carbide smelts unit 4 and heat-insulation conveying device 5 constitutes.
Feed material preparation units 1 include raw material breaker 11,12,13, middle warehouse 14,15,16 and conveyer device 17,
18、19；The raw material breaker is connected with middle warehouse and conveyer device successively.Feed material preparation units 1 are not necessarily filled
Put, can be selected according to feedstock particle size.
Mixed-forming unit 2 includes mixing device 21 and press ball device 22；The entrance of the mixing device 21 is pre- with raw material
The raw material conveying device 17,18,19 of processing unit is connected；The outlet phase of the entrance of the press ball device 22 and the mixing device
Even.
3 equipment therefor of fumed pyrogenic unit is double-deck no heat carrier heat accumulating type rotating bed, including pelletizing entrance 31, block stone
Lime stone entrance 32, oil gas vent 33 and hot mixture material outlet 34.
The mode of heating of the double-deck no heat carrier heat accumulating type rotating bed is double-deck radial canal heating.Per layer of heat accumulating type
Radial canal includes multiple parallel and equally distributed heat accumulation type radiant tube, and the upper and lower two-layer heat accumulation type radiant tube is in body height
It is in staggered distribution on direction.
The upper strata radial canal is placed in the top of upper strata flitch；Lower floor's radial canal is placed in the lower section of lower floor's flitch.
Uniform material hole is set on the upper strata flitch, and the raw coke oven gas that produce can pelletizing pyrolysis passes through.
The pelletizing entrance 31 is connected with the outlet of press ball device 22.
The device of carbide production unit 4 is closed energy-saving furnace of calcium carbide, is provided with high temperature active pelletizing and high temperature bulk calculogenesis
Grey entrance 41, calcium carbide furnace gas outlet 42 and carbide outlet 43；High temperature active pelletizing and high temperature lump lime entrance 41 are by close
Close heat-insulation conveying device to be connected with the hot mixture material outlet 34 of fumed pyrogenic unit 3.
The production method and system of carbide provided by the present invention, being will be reasonable respectively to powdered lime stone and block limestone
Utilize, by double-deck no heat carrier heat accumulating type rotating bed, block limestone and pelletizing are calcined and pyrolysis is completed, obtain high
Warm carbide raw material and oil gas product, and finally carbide is prepared using high temperature carbide raw material.
This method and system have following beneficial benefit：
Rationally using powdered lime stone and block limestone, it is to avoid powdered lime stone is wasted, while avoiding big gauge block
Broken, the screening of shape limestone, reduces power consumption and cost of material；
Using double-deck no heat carrier revolving bed, while the pyrolysis of coal in limestone calcination and pelletizing is completed, Calx is eliminated
Kiln, reduces installation cost and calcinating consumption；
In the flitch of upper strata, limestone calcination obtains quick lime, can the raw coke oven gas that produces of catalytic pyrolysiss lower floor pelletizing pyrolysis, will
Macromole coke tar cracking therein is micro-molecular gas, while the dust for carrying in raw coke oven gas is filtered, so as to improve pyrolysis gas
Quality, reduces coking of the raw coke oven gas in upper strata radial canal；
The sensible heat of pyrolysis solid can be made full use of using sealed thermal insulating conveying equipment, reduce the energy consumption of calcium carbide production process.
Embodiment 1
By breaker, middle low-order coal, powdered lime stone and binding agent are crushed to 50 mesh of granularity ＜；According to proportioning
(binding agent：Powdered lime stone：Coal dust=0.06:0.70:1) above-mentioned three kinds of materials are sent into strength by screw feeder respectively
Ball press being inserted after batch mixer mixing carries out molding；The lower layered material of double-deck no heat carrier heat accumulating type rotating bed sent into by gained type ball
Plate, while lump lime is sent into the upper strata flitch of revolving bed, (lump lime addition with initial quality of pc ratio is
1.1:1)；Upper strata radial canal is respectively 950 DEG C and 800 DEG C with the heating-up temperature of lower floor's radial canal.Make block limestone and pelletizing
Calcine respectively and pyrolysis is high temperature lump lime and high temperature active pelletizing, and obtain the oil gas product of high added value.Pyrolysis is produced
Raw oil gas product is drawn from the both sides of revolving bed or top by air-introduced machine, by being stored up after condensation, gas and oil separating plant respectively
Deposit.The high temperature lump lime that pyrolysis is produced and high temperature active pelletizing mix in revolving bed outlet, by sealed thermal insulating conveying dress
Putting and carbide smelting unit being delivered to, carbide is formed at 2000 DEG C.
Embodiment 2
By breaker, middle low-order coal, powdered lime stone and binding agent are crushed to 50 mesh of granularity ＜；According to proportioning
(binding agent：Powdered lime stone：Coal dust=0.23:1.1:1) above-mentioned three kinds of materials are sent into strength by screw feeder respectively
Ball press being inserted after batch mixer mixing carries out molding；The lower layered material of double-deck no heat carrier heat accumulating type rotating bed sent into by gained type ball
Plate, while lump lime is sent into the upper strata flitch of revolving bed, (lump lime addition with initial quality of pc ratio is
0.7:1)；Upper strata radial canal is respectively 900 DEG C and 750 DEG C with the heating-up temperature of lower floor's radial canal.Make block limestone and pelletizing
Calcine respectively and pyrolysis is high temperature lump lime and high temperature active pelletizing, and obtain the oil gas product of high added value.Pyrolysis is produced
Raw oil gas product is drawn from the both sides of revolving bed or top by air-introduced machine, by being stored up after condensation, gas and oil separating plant respectively
Deposit.The high temperature lump lime that pyrolysis is produced and high temperature active pelletizing mix in revolving bed outlet, by sealed thermal insulating conveying dress
Putting and carbide smelting unit being delivered to, carbide is formed at 1850 DEG C.
Embodiment 3
By breaker, middle low-order coal, powdered lime stone and binding agent are crushed to 50 mesh of granularity ＜；According to proportioning
(binding agent：Powdered lime stone：Coal dust=0.21:0.9:1) above-mentioned three kinds of materials are sent into strength by screw feeder respectively
Ball press being inserted after batch mixer mixing carries out molding；The lower layered material of double-deck no heat carrier heat accumulating type rotating bed sent into by gained type ball
Plate, while lump lime is sent into the upper strata flitch of revolving bed, (lump lime addition with initial quality of pc ratio is
0.9:1)；Upper strata radial canal is respectively 1000 DEG C and 900 DEG C with the heating-up temperature of lower floor's radial canal.Make block limestone and pelletizing
Calcine respectively and pyrolysis is high temperature lump lime and high temperature active pelletizing, and obtain the oil gas product of high added value.Pyrolysis is produced
Raw oil gas product is drawn from the both sides of revolving bed or top by air-introduced machine, by being stored up after condensation, gas and oil separating plant respectively
Deposit.The high temperature lump lime that pyrolysis is produced and high temperature active pelletizing mix in revolving bed outlet, by sealed thermal insulating conveying dress
Putting and carbide smelting unit being delivered to, carbide is formed at 1950 DEG C.
As seen from the above-described embodiment, technical scheme energy effectively utilizes are pyrolyzed the sensible heat of high-temp solid, both utilize
Powdered lime stone is effectively utilized block limestone again, it is to avoid powdered lime stone is wasted, while avoid a large amount of bulk stones
Broken, the screening of lime stone, reduces power consumption and cost of material；Using double-deck no heat carrier revolving bed, while completing limestone
The pyrolysis of coal in calcining and pelletizing, eliminates limekiln, reduces installation cost and calcinating consumption；Limestone calcination in the flitch of upper strata
Obtain quick lime, can the raw coke oven gas that produces of catalytic pyrolysiss lower floor pelletizing pyrolysis, by macromole coke tar cracking therein be
Gas, while filtering the dust for carrying in raw coke oven gas, so as to improve the quality of pyrolysis gas, reduces raw coke oven gas in upper strata radial canal
Coking；The sensible heat of pyrolysis solid can be made full use of using sealed thermal insulating conveying equipment, reduce the energy consumption of calcium carbide production process.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and simultaneously
The non-restriction to embodiment.For those of ordinary skill in the field, can also do on the basis of the above description
Go out change or the variation of other multi-forms.There is no need to be exhaustive to all of embodiment.And thus drawn
Obvious change or change among still in protection scope of the present invention that Shen goes out.
Claims (10)
1. a kind of method that utilization limestone produces carbide, methods described includes step：
The mixed material of the middle low-order coal, limestone and binding agent of fine-powdered is shaped to pelletizing；
The pelletizing and block limestone are sent into the layering pyrolysis of Double layer rotating bed, the pelletizing is placed in the bulk limestone
Lower floor so that the bulk limestone raw coke oven gas that pelletizing pyrolysis described in catalytic pyrolysiss lower floor is produced while calcining, calcining
Pyrolysis obtains high temperature lump lime, oil gas product and high temperature active pelletizing；
The high temperature lump lime is conveyed into carbide smelting furnace with the insulation of high temperature active pelletizing, generates carbide and furnace of calcium carbide
Gas.
2. method according to claim 1, it is characterised in that methods described also includes pre-treatment step：
The middle low-order coal, limestone and binding agent are all crushed to the fine-powdered of 50 mesh of granularity ＜.
3. method according to claim 1, it is characterised in that the weight content of the binding agent is the mixed material
1.0%-10.0%.
4. method according to claim 1, it is characterised in that the limestone of the fine-powdered and the middle low-order coal plus
Enter mass ratio for 0.7-1.1:1.
5. method according to claim 1, it is characterised in that the addition of the bulk limestone is the middle low-order coal
Add the 0.7-1.1 of quality:1.
6. method according to claim 1, it is characterised in that the pyrolysis temperature of the bulk limestone is 900-1000
℃；The pyrolysis temperature of the pelletizing is 750-900 DEG C.
7. a kind of system for realizing producing carbide method using limestone described in any one of claim 1 to 6, the system includes
Mixed-forming unit, fumed pyrogenic unit, carbide smelt unit and heat-insulation conveying device, wherein
The fumed pyrogenic unit is double-deck no heat carrier heat accumulating type rotating bed, including pelletizing entrance, block limestone entrance, oil
Gas outlet, the outlet of hot mixture material；The pelletizing entrance is connected with the outlet of the mixed-forming unit；The high temperature mixing
Material outlet is connected with the entrance of the heat-insulation conveying device；
The double-deck no heat carrier heat accumulating type rotating bed be originally sequentially provided with from top to bottom in vivo upper strata radial canal, upper strata flitch, under
Layered material plate, lower floor's radial canal, are provided with material hole on the upper strata flitch, the raw coke oven gas for producing pelletizing pyrolysis leads to
Cross；
It is closed type calcium carbide furnace that the carbide smelts unit, is provided with high temperature lump lime and high temperature active pelletizing entrance, carbide
Furnace gas export and carbide outlet；The high temperature lump lime and high temperature active pelletizing entrance are gone out with the heat-insulation conveying device
Mouth is connected.
8. system according to claim 7, it is characterised in that the upper strata radial canal and lower floor's radial canal are described
It is in staggered distribution on double-deck no heat carrier heat accumulating type rotating bed body height direction, the upper strata radial canal and lower floor's radial canal
All include multiple parallel and equally distributed heat accumulation type radiant tube.
9. system according to claim 7, it is characterised in that be additionally provided with pretreatment of raw material list before the mixed-forming unit
Unit, which includes raw material breaker, middle warehouse and conveyer device；The raw material breaker successively with middle warehouse and conveying
Device is connected.
10. system according to claim 9, it is characterised in that the mixed-forming unit includes mixing device and pressure ball
Device；The entrance of the mixing device is connected with the raw material conveying device of the feed material preparation units；The press ball device
Entrance is connected with the outlet of the mixing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611167705.8A CN106430208A (en) | 2016-12-16 | 2016-12-16 | Method and system for producing calcium carbide by utilizing limestone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611167705.8A CN106430208A (en) | 2016-12-16 | 2016-12-16 | Method and system for producing calcium carbide by utilizing limestone |
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| Publication Number | Publication Date |
|---|---|
| CN106430208A true CN106430208A (en) | 2017-02-22 |
Family
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| CN107352541A (en) * | 2017-07-12 | 2017-11-17 | 神雾环保技术股份有限公司 | A kind of method and system for preparing calcium carbide |
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| CN107857268A (en) * | 2017-12-13 | 2018-03-30 | 神雾环保技术股份有限公司 | A kind of system and method for producing calcium carbide |
| CN108046260A (en) * | 2017-12-13 | 2018-05-18 | 神雾环保技术股份有限公司 | A kind of system and method for producing calcium carbide |
| CN109734096A (en) * | 2019-03-13 | 2019-05-10 | 北京双零矿山装备技术有限公司 | A kind of method and system producing calcium carbide |
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| CN109850900A (en) * | 2017-11-30 | 2019-06-07 | 神雾环保技术股份有限公司 | A kind of system for producing calcium carbide |
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| CN107857268A (en) * | 2017-12-13 | 2018-03-30 | 神雾环保技术股份有限公司 | A kind of system and method for producing calcium carbide |
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