CN106635096A - System and method for treating pulverized coal and calcium-based raw material - Google Patents
System and method for treating pulverized coal and calcium-based raw material Download PDFInfo
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- CN106635096A CN106635096A CN201611113759.6A CN201611113759A CN106635096A CN 106635096 A CN106635096 A CN 106635096A CN 201611113759 A CN201611113759 A CN 201611113759A CN 106635096 A CN106635096 A CN 106635096A
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- 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
- C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
-
- 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
- C10B27/00—Arrangements for withdrawal of the distillation gases
-
- 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
- C10B37/00—Mechanical treatments of coal charges in the oven
-
- 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
- C10B43/00—Preventing or removing incrustations
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
- C10G1/002—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal in combination with oil conversion- or refining processes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/02—Dust removal
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K3/00—Modifying the chemical composition of combustible gases containing carbon monoxide to produce an improved fuel, e.g. one of different calorific value, which may be free from carbon monoxide
- C10K3/02—Modifying the chemical composition of combustible gases containing carbon monoxide to produce an improved fuel, e.g. one of different calorific value, which may be free from carbon monoxide by catalytic treatment
- C10K3/023—Reducing the tar content
Abstract
The invention relates to a system and a method for treating pulverized coal and a calcium-based raw material. The system comprises a pyrolysis unit, a gas purification unit, a hydrogasification unit and a calcium carbide smelting unit, wherein the pyrolysis unit comprises a pulverized coal and calcium-based raw material mixed pellet inlet, a raw coke oven gas outlet and a pyrolysis solid pellet outlet; the gas purification unit comprises a raw coke oven gas inlet and a purified coke oven gas outlet; the raw coke oven gas inlet is connected with the raw coke oven gas outlet; the hydrogasification unit comprises a pulverized coal spray nozzle, a purified coke oven gas spray nozzle, a coke residue outlet and an oil gas outlet; the purified coke oven gas spray nozzle is connected with the purified coke oven gas outlet; the calcium carbide smelting unit comprises a high-temperature solid pellet inlet, a calcium carbide furnace gas outlet and a calcium carbide outlet; the high-temperature solid pellet inlet is connected with the pyrolysis solid pellet outlet. According to the system and the method disclosed by the invention, by using the advantage of high quality and high hydrogen content of pyrolysis gas obtained by copyrolysis of coal and quick lime in a preheating furnace, the pyrolysis gas can be used as a hydrogen source of coal hydrogasification when calcium carbide is produced, so that the cost of the hydrogen source is reduced, and the thermal efficiency of the system is improved.
Description
Technical field
The invention belongs to chemical technology field, more particularly to a kind of system and method for processing coal dust and calcio raw material.
Background technology
Coal hydrogenation gasification be instigate raw coal powder and hydrogeneous reacting gas under high temperature, condition of high voltage (800 DEG C～1000 DEG C,
3MPa～8MPa) react the process for generating the gas rich in methane and light-end products.Compared with traditional coal gasification, coal hydrogenation
Gasification has the characteristics of process is simple, the thermal efficiency are high, pollution is little, thus is widely paid close attention to and applied.But, the valency of hydrogen
Lattice are expensive, therefore the alternative atmosphere of searching hydrogen becomes the focus of many researcheres.
Prior art reports that the middle low-order coal of powdery can obtain high temperature with Jing preheating furnaces pyrolysis after powdery quick lime mixing pressure ball
Active pelletizing, direct heat is sent into furnace of calcium carbide and carries out carbide production.In the process, raw material is given birth to for the middle low-order coal and powdery of powdery
The pyrolysis of Calx, mixing pelletizing in preheating furnace belongs to the conveying without heat carrier pyrolysis, high temperature pelletizing and belongs to high-temperature closed conveying,
Therefore the cost of material of carbide production can be greatly reduced, the quality of pyrolysis gas and the thermal efficiency of system is improved, is reduced production energy
Consumption.It is worth noting that, in preheating furnace during copyrolysis, calcium oxide can greatly improve pyrolysis as catalyst for calcium oxide and coal
Hydrogen content in gas is high, up to more than 50v%, if can be hydrogenated with the pyrolysis gas that coal and quick lime mixed pyrolysis are produced as coal dust
The hydrogen source of gasification, can greatly reduce the cost of coal hydrogenation gasification.
The content of the invention
The purpose of the present invention be by coal dust and calcio raw material mixed type ball the oil gas product of generation is pyrolyzed in preheating furnace with
And pyrolysis solid is directly utilized at high temperature, to improve the heat utilization efficiency of system.
For achieving the above object, the system that the present invention proposes a kind of process coal dust and calcio raw material, including pyrolysis unit,
Gas purification units, hydrogasification unit and carbide smelt unit；Wherein,
The pyrolysis unit includes that coal dust exports with calcio raw material mixed type ball entrance, raw coke oven gas and is pyrolyzed solid pelletizing and goes out
Mouthful, the pyrolysis unit is used for the high temperature pyrolysis of coal dust and calcio raw material mixed type ball；
The gas purification units include raw coke oven gas entrance and purified gas outlet, the raw coke oven gas entrance and the raw coke oven gas
Outlet is connected, and the gas purification units are used for raw coke oven gas dedusting and make the catalytic cracking of tar in raw coke oven gas；
The hydrogasification unit includes coal nozzle, clean coal gas jets, cinder outlet and oil gas vent, the clean coal
Gas jets are connected with purified gas outlet, and in the hydrogasification unit, the purified gas is hydrogenated with as hydrogen source with coal
Gasification reaction；
The carbide smelts unit includes high-temp solid pelletizing entrance, calcium carbide furnace gas outlet and carbide outlet, the high temperature
Solid pelletizing entrance is connected with pyrolysis solid pelletizing outlet, and the carbide smelts unit to be used to consolidate the high temperature that pyrolysis is produced
Body pelletizing is smelted.
Further, the system also includes coal dust and calcio feed material preparation units, and the coal dust is pre- with calcio raw material
Processing unit includes coal dust with calcio feed(raw material)inlet and coal dust and the outlet of calcio raw material mixed type ball, the coal dust and calcio raw material
Mixed type ball is exported and the coal dust is connected with calcio raw material mixed type ball entrance, the coal dust and calcio feed material preparation units
Coal dust and calcio raw material mixed type ball are obtained for coal dust and calcio raw material to be carried out into process.
Further, the device that the pyrolysis unit is used is without heat carrier heat accumulating type preheating furnace.
Upper and lower two-layer heat accumulation type radiant tube is provided with the heat accumulating type preheating furnace without heat carrier, it is parallel to be evenly distributed on material
Above and below layer, and adjacent upper strata radial canal is in staggered distribution with lower floor radial canal.
The device that the gas purification units are used is purification reactor.
The device that the hydrogasification unit is used is gasification furnace.
The device that the carbide smelting unit is used is furnace of calcium carbide.
Further, undermost gas distributor is located inside the purification reactor and is arranged successively from the bottom up
The filter layer and catalytic cracking of tar catalyst layer of row.
Specifically, the filter layer be ceramic filter plate, for removing the raw coke oven gas in dust and accumulation of heat.
The catalytic cracking of tar catalyst layer is CaO, for the sufficiently catalytic acquisition of the tar in the raw coke oven gas is hot
Vent one's spleen and tar light oil.
Preferably, the clean coal gas jets number is even number, is symmetrically arranged amongst the surrounding of the coal nozzle.
Further, the system also includes heat-insulation conveying device, and the high-temp solid pelletizing entrance is by the insulation
Conveyer device is connected with the pyrolysis solid pelletizing outlet；The high temperature conveyer device is heat-preserving container or insulation carrier bar.
The present invention also provides a kind of method processed coal dust and calcio raw material, it is characterised in that including step：
A. it is pyrolyzed：The coal dust and calcio raw material mixed type ball are sent into into the pyrolysis unit carries out high temperature pyrolysis, obtains
Pyrolysis of coal product raw coke oven gas and high-temp solid pelletizing；
B. gas purification：The raw coke oven gas is sent into into the gas purification units, through filtering, catalytic cracking of tar is obtained
The purified gas；
C. hydrogasification：There is hydrogasification as hydrogen source and coal using the purified gas in the hydrogasification unit anti-
Should, obtain high methane gas and tar light oil；
D. carbide production：Unit is smelted in the carbide to be smelted the high-temp solid pelletizing for being pyrolyzed generation, obtain
To liquid carbide and calcium carbide furnace gas.
Further, methods described also includes, pretreatment：In the coal dust and calcio feed material preparation units by the coal
Powder carries out crushing and screening with the calcio raw material, then mixes with binding agent and the compressing coal dust and the calcio raw material of obtaining
Mixed type ball.
Specifically, the pyrolysis temperature of the pyrolysis unit is controlled at 800-1000 DEG C, pyrolysis time is 15-30min.Institute
The catalytic cracking of tar temperature for stating catalytic cracking of tar catalyst layer is 700-900 DEG C.
As preferred embodiment, the coal dust is controlled to coal dust particle size after cracking in calcio raw material mixed type ball<
1mm.The calcio raw material particle size after cracking is controlled to<3mm.The addition of the binding agent is the 1.0wt%- of mixed material
10.0wt%.The calcio raw material is 0.8-1.2 with the addition mass ratio of the coal dust:1.
Specifically, it is 800-1000 DEG C by the hydrogasification unit process temperature control, vaporization time is less than 2s.
Used as preferred embodiment, it is 1800-2200 DEG C that the carbide smelts unit process temperature.
The present invention is coupled coal with coal hydrogenation gasification and carbide production technology with the pyrolysis of calcio raw material mixing pelletizing, utilizes
The coal advantage that pyrolysis gas quality obtained by copyrolysis is high in preheating furnace with calcio raw material, hydrogen content is high, while carbide is produced,
The cost of hydrogen source can be reduced as the hydrogen source of coal hydrogenation gasification, and using the sensible heat of high temperature pyrolysis gas, be improve
System thermal efficiency.
Using the system and method for the present invention, following effect is achieved：
(1) using being pyrolyzed without heat carrier heat accumulating type preheating furnace, heat utilization efficiency not only can be improved, can also improves pyrolysis
The quality of gas；
(2) raw coke oven gas that preheating furnace pyrolysis is produced directly inputs gas purification units, will wherein be taken using its part sensible heat
The tar of band is cracked into gas and tar light oil under catalyst action, improves value-added content of product；And give at high temperature again
Enter hydrogasification stove, make full use of the sensible heat of raw coke oven gas；
(3) the tar cracking catalyst bed (CaO beds) of gas purification units after purification gas can direct reuse, make
For the raw material of batch mixing pelletizing, it is to avoid produce solid waste, and be pyrolyzed again, tar of bed etc. will be sticked to and cracked again, it is to avoid wave
Take；
(4) raw coke oven gas that pyrolysis is produced not only drops Jing after high temperature purification directly as the hydrogen source of hydropyrolysis unit
The low cost of hydrogen source, can also reduce the preheating of hydrogen, reduce the energy consumption of reaction of hydrogenation unit；
(5) the high-temp solid pelletizing end count that pyrolysis is produced closes heat-insulation conveying device, directly enters furnace of calcium carbide, can make full use of heat
The sensible heat of solution solid, further reduces the energy consumption of carbide production.
The additional aspect and advantage of the present invention will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Description of the drawings
Fig. 1 is the production technological process of the present invention；
Fig. 2 is the production system schematic diagram 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
Enough more fully understand the advantage of the solution of the present invention and its various aspects.However, specific embodiments described below and enforcement
Example is only descriptive purpose, rather than limitation of the present invention.
The present invention proposes a kind of method of pyrolysis of coal, hydrogasification and carbide production coupling, such as Fig. 1, including following step
Suddenly：
The first step：Coal dust is pyrolyzed with calcio raw material mixing pelletizing：Will coal dust and calcio raw material mixing pelletizing pass through belt
Conveyer sends into preheating furnace, and high temperature pyrolysis obtain pyrolysis of coal product raw coke oven gas and high-temp solid pelletizing；Wherein, pyrolysis reactor is
Without heat carrier heat accumulating type preheating furnace；Pyrolysis temperature is 800-1000 DEG C, and pyrolysis time is 15-30min；
The coal dust is as follows with the preparation method of calcio raw material mixed type ball：Middle low-order coal is carried out with calcio raw material first
Crushing and screening, middle low-order coal is crushed to<1mm；Calcio raw material is crushed to<3mm；Then by coal dust, calcio raw material and binding agent
Mixing, and it is compressing；The addition of binding agent is mixed material 1.0wt%-10.0wt%；The addition of calcio raw material and coal dust
Mass ratio is 0.8-1.2:1；
Second step：Raw coke oven gas is purified：Pyrolysis produce raw coke oven gas enter gas purification units, through solid bed filter,
Catalytic cracking of tar obtains purified gas；The catalytic cracking of tar beds are CaO；The temperature of catalytic cracking of tar is
700-900℃；
3rd step：Coal hydrogenation gasification：There is hydrogasification with coal dust anti-as hydrogen source in the purified gas sent using clean unit
Should, obtain high methane gas and tar light oil.The reactor of hydrogasification is gasification furnace；Gasification temperature is 800-1000 DEG C；Gasification
Time is less than 2s；
4th step：Carbide is produced：The warm closed conveying device of high-temp solid pelletizing that preheating furnace pyrolysis is produced sends into electricity
Stone stove, is heated to 1800-2200 DEG C in furnace of calcium carbide, smelts and liquid carbide and calcium carbide furnace gas are obtained.
The present invention proposes a kind of system of pyrolysis of coal, hydrogasification and carbide production coupling, such as Fig. 2：
System for producing calcium carbide described in the invention is by preheating furnace pyrolysis unit 1, raw coke oven gas clean unit 2, coal hydrogenation gas
Change unit 3 and carbide is smelted unit 4 and constituted.
The device of preheating furnace pyrolysis unit can be mixed with calcio raw material without heat carrier heat accumulating type preheating furnace, including coal dust
Type ball entrance 11, raw coke oven gas outlet 12 and pyrolysis solid pelletizing outlet 13；The coal dust and calcio raw material mixed type ball entrance with
Type ball belt conveyor is connected；
The device of gas purification units 2 can be purification reactor, be provided with raw coke oven gas entrance 21 and purified gas outlet 25；Institute
State raw coke oven gas entrance 21 to be connected with the raw coke oven gas outlet 12 of preheating furnace pyrolysis unit 1.Gas is provided with inside the purification reactor
Distributor 22 and the filter layer 23 being arranged in order from the bottom up and catalytic cracking of tar catalyst layer 24；The filter layer is
Ceramic filter plate, it is therefore an objective to remove the dust in raw coke oven gas and play a part of accumulation of heat；The catalytic cracking of tar catalyst layer
Purpose be to obtain pyrolysis gas and tar light oil by the tar in raw coke oven gas is sufficiently catalytic；
The device of hydrogasification unit can be gasification furnace, be provided with coal nozzle 31, clean coal gas jets 32, cinder outlet 33
And oil gas vent 34；The clean coal gas jets 32 are connected with the purified gas outlet 25 of gas purification units 2；The clean coal gas blowout
Mouth number is even number, is symmetrically arranged amongst the surrounding of coal nozzle 31, is easy to purified gas sufficiently to be mixed with coal dust；
It can be furnace of calcium carbide that carbide smelts the device of unit 4, be provided with high-temp solid pelletizing entrance 41, calcium carbide furnace gas outlet 42
With carbide outlet 43；The high-temp solid pelletizing entrance 41 is consolidated by heat-insulation conveying device with the pyrolysis of preheating furnace pyrolysis unit 1
Body pelletizing outlet 13 is connected；The high temperature conveyer device can be heat-preserving container or the one kind in insulation carrier bar.
Below with reference to specific embodiment, present invention is described, it should be noted that embodiment is only descriptive
, and the present invention is limited never in any form.
Embodiment 1
Using the system of the present invention, first middle low-order coal and limestone are carried out into crushing and screening, middle low-order coal is crushed to<
1mm；Limestone crushing is extremely<2mm；Then coal dust, limestone and binding agent are mixed, and it is compressing, obtain coal dust and Calx
Stone mixed type ball；Wherein, the addition of binding agent is mixed material 1.0wt%, and limestone is with the addition mass ratio of coal dust
0.8:1。
Then coal dust and limestone mixed type ball are sent into into preheating furnace pyrolysis unit with belt conveyor.Mixing pelletizing is pre-
20min is pyrolyzed in hot stove at 900 DEG C, raw coke oven gas and high-temp solid pelletizing is obtained；Raw coke oven gas is fed directly at high temperature purification
Reactor, keeps reactor temperature to be 750 DEG C, and raw coke oven gas first passes around gas distributor, to ensure gas in reactor
It is uniformly distributed, ceramic filter is sequentially passed through afterwards carries out purifying and dedusting and catalytic cracking of tar beds, obtains clean coal
Gas and tar light oil；Finally the gas is sprayed into into hydrogasification stove by clean coal gas jets, the coal dust sprayed into coal nozzle enters
Row is sufficiently mixed, and hydrogasification reaction is carried out at 850 DEG C, obtains high methane gas and tar light oil, do after purification separation into
One step is utilized；The high-temp solid pelletizing end count that preheating furnace pyrolysis unit is obtained closes insulation conveying equipment and sends into carbide smelting device,
Smelt at 1800 DEG C and obtain carbide.
Embodiment 2
The present embodiment is as the system for use in carrying of above-described embodiment 1, but process conditions are different, as described below.By middle low-order coal
Crushing and screening is carried out with quick lime, middle low-order coal is crushed to<1mm；Carbide slag is crushed to<3mm；Then by coal dust, quick lime
And binding agent mixing, and it is compressing, obtain coal dust and quick lime mixed type ball；Wherein, the addition of binding agent is mixture
Material 10.0wt%, quick lime is 1.2 with the addition mass ratio of coal dust:1.
Then coal dust and quick lime mixed type ball are sent into into preheating furnace pyrolysis unit with belt conveyor.Mixing pelletizing is pre-
15min is pyrolyzed in hot stove at 800 DEG C, raw coke oven gas and high-temp solid pelletizing is obtained；Raw coke oven gas is fed directly at high temperature purification
Reactor, keeps reactor temperature to be 850 DEG C, and raw coke oven gas first passes around gas distributor, to ensure gas in reactor
It is uniformly distributed, ceramic filter is sequentially passed through afterwards carries out purifying and dedusting and catalytic cracking of tar beds, obtains clean coal
Gas and tar light oil；Finally the gas is sprayed into into hydrogasification stove by clean coal gas jets, the coal dust sprayed into coal nozzle enters
Row is sufficiently mixed, and hydrogasification reaction is carried out at 800 DEG C, obtains high methane gas and tar light oil, do after purification separation into
One step is utilized；The high-temp solid pelletizing end count that preheating furnace pyrolysis unit is obtained closes insulation conveying equipment and sends into carbide smelting device,
Smelt at 2000 DEG C and obtain carbide.
Embodiment 3
The present embodiment is as the system for use in carrying of above-described embodiment 1, but process conditions are different, as described below.By middle low-order coal
Crushing and screening is carried out with carbide slag, middle low-order coal is crushed to<1mm；Carbide slag is crushed to<3mm；Then by coal dust, carbide slag
And binding agent mixing, and it is compressing, obtain coal dust and carbide slag mixed type ball；Wherein, the addition of binding agent is mixture
Material 4.0wt%, carbide slag is 1 with the addition mass ratio of coal dust:1.
Then coal dust and carbide slag mixed type ball are sent into into preheating furnace pyrolysis unit with belt conveyor.Mixing pelletizing is pre-
30min is pyrolyzed in hot stove at 800 DEG C, raw coke oven gas and high-temp solid pelletizing is obtained；Raw coke oven gas is fed directly at high temperature purification
Reactor, keeps reactor temperature to be 700 DEG C, and raw coke oven gas first passes around gas distributor, to ensure gas in reactor
It is uniformly distributed, ceramic filter is sequentially passed through afterwards carries out purifying and dedusting and catalytic cracking of tar beds, obtains clean coal
Gas and tar light oil；Finally the gas is sprayed into into hydrogasification stove by clean coal gas jets, the coal dust sprayed into coal nozzle enters
Row is sufficiently mixed, and hydrogasification reaction is carried out at 1000 DEG C, obtains high methane gas and tar light oil, do after purification separation into
One step is utilized；The high-temp solid pelletizing end count that preheating furnace pyrolysis unit is obtained closes insulation conveying equipment and sends into carbide smelting device,
Smelt at 2200 DEG C and obtain carbide.
Embodiment 4
The present embodiment is as the system for use in carrying of above-described embodiment 1, but process conditions are different, as described below.By middle low-order coal
Crushing and screening is carried out with Calx, middle low-order coal is crushed to<1mm；Calx is crushed to<3mm；Then by coal dust, Calx and bonding
Agent mixes, and compressing, obtains coal dust and Calx mixed type ball；Wherein, the addition of binding agent is mixed material
8.0wt%, Calx is 1.2 with the addition mass ratio of coal dust:1.
Then coal dust and Calx mixed type ball are sent into into preheating furnace pyrolysis unit with belt conveyor.Mixing pelletizing is in preheating
15min is pyrolyzed in stove at 1000 DEG C, raw coke oven gas and high-temp solid pelletizing is obtained；It is anti-that raw coke oven gas is fed directly at high temperature purification
Device is answered, keeps reactor temperature to be 900 DEG C, raw coke oven gas first passes around gas distributor, to ensure gas in reactor
Even distribution, ceramic filter is sequentially passed through afterwards carries out purifying and dedusting and catalytic cracking of tar beds, obtains purified gas
And tar light oil；Finally the gas is sprayed into into hydrogasification stove by clean coal gas jets, the coal dust sprayed into coal nozzle is carried out
It is sufficiently mixed, and hydrogasification reaction is carried out at 850 DEG C, obtain high methane gas and tar light oil, does after purification separation into one
Step is utilized；The high-temp solid pelletizing end count that preheating furnace pyrolysis unit is obtained closes insulation conveying equipment and sends into carbide smelting device,
Smelt at 2000 DEG C and obtain carbide.
Claims (10)
1. a kind of system for processing coal dust and calcio raw material, including pyrolysis unit, gas purification units, hydrogasification unit and
Carbide smelts unit；Wherein,
The pyrolysis unit includes coal dust and calcio raw material mixed type ball entrance, raw coke oven gas outlet and the pelletizing outlet of pyrolysis solid,
The pyrolysis unit is used for the high temperature pyrolysis of coal dust and calcio raw material mixed type ball；
The gas purification units include that raw coke oven gas entrance and purified gas are exported, and the raw coke oven gas entrance and the raw coke oven gas are exported
It is connected, the gas purification units obtain purified gas for carrying out process to raw coke oven gas；
The hydrogasification unit includes coal nozzle, clean coal gas jets, cinder outlet and oil gas vent, the clean coal gas blowout
Mouth is connected with purified gas outlet, and in the hydrogasification unit, the purified gas occurs hydrogasification as hydrogen source and coal
Reaction；
The carbide smelts unit includes high-temp solid pelletizing entrance, calcium carbide furnace gas outlet and carbide outlet, the high-temp solid
Pelletizing entrance is connected with pyrolysis solid pelletizing outlet, and the carbide smelts the high-temp solid ball that unit is used to produce pyrolysis
Group is smelted.
2. system according to claim 1, it is characterised in that
The system also includes coal dust and calcio feed material preparation units, and the coal dust includes coal with calcio feed material preparation units
Powder and calcio feed(raw material)inlet and coal dust are exported with calcio raw material mixed type ball, the coal dust export with calcio raw material mixed type ball and
The coal dust is connected with calcio raw material mixed type ball entrance, and the coal dust is used for coal dust and calcium with calcio feed material preparation units
Based raw material carries out process and obtains coal dust and calcio raw material mixed type ball.
3. system according to claim 1 and 2, it is characterised in that
The device that the pyrolysis unit is used is, without heat carrier heat accumulating type preheating furnace, to set in the heat accumulating type preheating furnace without heat carrier
Be equipped with upper and lower two-layer heat accumulation type radiant tube, parallel to be evenly distributed on above and below the bed of material and adjacent upper strata radial canal with
Lower floor's radial canal is in staggered distribution；
The device that the gas purification units are used is purification reactor；
The device that the hydrogasification unit is used is gasification furnace；
The device that the carbide smelting unit is used is furnace of calcium carbide.
4. system according to claim 3, it is characterised in that
Have inside the purification reactor be located at undermost gas distributor and the filter layer that is arranged in order from the bottom up and
Catalytic cracking of tar catalyst layer；
The filter layer be ceramic filter plate, for removing the raw coke oven gas in dust and accumulation of heat；
The catalytic cracking of tar catalyst layer is CaO, for by the sufficiently catalytic acquisition pyrolysis gas of tar in the raw coke oven gas
And tar light oil.
5. system according to claim 1, it is characterised in that
The clean coal gas jets number is even number, is symmetrically arranged amongst the surrounding of the coal nozzle；
The system also include heat-insulation conveying device, the high-temp solid pelletizing entrance by the heat-insulation conveying device with it is described
The pelletizing outlet of pyrolysis solid is connected；The high temperature conveyer device is heat-preserving container or insulation carrier bar.
6. a kind of coal dust and calcio raw material are processed method with claim 1-5 arbitrary system, it is characterised in that
Including step：
A. it is pyrolyzed：The coal dust and calcio raw material mixed type ball are sent into into the pyrolysis unit carries out high temperature pyrolysis, obtains coal heat
Solution product raw coke oven gas and high-temp solid pelletizing；
B. gas purification：The raw coke oven gas is sent into into the gas purification units, obtains described through filtration, catalytic cracking of tar
Purified gas；
C. hydrogasification：There is hydrogasification reaction as hydrogen source and coal using the purified gas in the hydrogasification unit, obtain
To high methane gas and tar light oil；
D. carbide production：Unit is smelted in the carbide to be smelted the high-temp solid pelletizing for being pyrolyzed generation, obtain liquid
State carbide and calcium carbide furnace gas.
7. method according to claim 6, it is characterised in that methods described also includes,
Pretreatment：The coal dust and the calcio raw material are carried out into broken sieve in the coal dust and calcio feed material preparation units
Point, then mix with binding agent and the compressing coal dust and the calcio raw material mixed type ball of obtaining.
8. the method according to claim 6 or 7, it is characterised in that the pyrolysis temperature control of the pyrolysis unit exists
800-1000 DEG C, pyrolysis time is 15-30min；The catalytic cracking of tar temperature of the catalytic cracking of tar catalyst layer is
700-900℃。
9. method according to claim 7, it is characterised in that break the coal dust with coal dust in calcio raw material mixed type ball
Particle degree is controlled to<1mm, the calcio raw material particle size after cracking is controlled to<3mm, the addition of the binding agent is mixed material
1.0wt%-10.0wt%, the addition mass ratio of the calcio raw material and the coal dust is 0.8-1.2:1.
10. method according to claim 6, it is characterised in that be by the hydrogasification unit process temperature control
800-1000 DEG C, vaporization time is less than 2s；It is 1800-2200 DEG C that the carbide smelts unit process temperature.
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