CN206266492U - A kind of system for processing coal dust and calcium based raw material - Google Patents
A kind of system for processing coal dust and calcium based raw material Download PDFInfo
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- CN206266492U CN206266492U CN201621328806.4U CN201621328806U CN206266492U CN 206266492 U CN206266492 U CN 206266492U CN 201621328806 U CN201621328806 U CN 201621328806U CN 206266492 U CN206266492 U CN 206266492U
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Abstract
The utility model discloses a kind of system for processing coal dust and calcium based raw material.The system includes that pyrolysis unit, gas purification units, hydrogasification unit and calcium carbide smelt unit；Pyrolysis unit includes coal dust with calcium based raw material mixed type ball entrance, raw coke oven gas outlet and the pelletizing outlet of pyrolysis solid；Gas purification units include that raw coke oven gas entrance and purified gas are exported, and raw coke oven gas entrance is connected with raw coke oven gas outlet；Hydrogasification unit includes coal nozzle, clean coal gas jets, cinder outlet and oil gas vent, and clean coal gas jets are connected with purified gas outlet；Calcium carbide smelts unit includes high-temp solid pelletizing entrance, calcium carbide furnace gas outlet and calcium carbide outlet, and high-temp solid pelletizing entrance is connected with the pelletizing outlet of pyrolysis solid.The utility model while calcium carbide is produced, can reduce the cost of hydrogen source using coal and the quick lime advantage that pyrolysis gas quality is high obtained by copyrolysis in preheating furnace, hydrogen content is high as the hydrogen source of coal hydrogenation gasification, improve system thermal efficiency.
Description
Technical field
The utility model belongs to chemical technology field, more particularly to a kind of system for processing coal dust and calcium based 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 gas and light-end products rich in methane.Compared with traditional coal gasification, coal hydrogenation
Gasification has the characteristics of process is simple, the thermal efficiency are high, pollution is small, thus is widely paid close attention to and applied.But, the valency of hydrogen
Lattice are expensive, therefore find the focus of the alternative atmosphere as many researchers of hydrogen.
Prior art reports that the middle low-order coal of powdery can obtain high temperature with after powdery quick lime mixing pressure ball through preheating furnace pyrolysis
Active pelletizing, direct heat is sent into furnace of calcium carbide and carries out calcium carbide production.In the process, raw material is middle low-order coal and the powdery life of powdery
The pyrolysis of lime, 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 calcium 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.
Utility model content
The purpose of this utility model is to produce the oil gas that coal dust and calcium based raw material mixed type ball are pyrolyzed generation in preheating furnace
Product and pyrolysis solid are directly utilized at high temperature, to improve the heat utilization efficiency of system.
To achieve the above object, the utility model proposes a kind of system for processing coal dust and calcium based raw material, including pyrolysis
Unit, gas purification units, hydrogasification unit and calcium carbide smelt unit；Wherein,
The pyrolysis unit includes that coal dust goes out with calcium based raw material mixed type ball entrance, raw coke oven gas outlet and pyrolysis solid pelletizing
Mouthful, the pyrolysis unit is used for the high temperature pyrolysis of coal dust and calcium based 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 the catalytic cracking of tar that makes 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 calcium carbide smelts unit includes high-temp solid pelletizing entrance, calcium carbide furnace gas outlet and calcium carbide outlet, the high temperature
Solid pelletizing entrance is connected with pyrolysis solid pelletizing outlet, and the calcium 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 calcium based raw material pretreatment unit, and the coal dust is pre- with calcium based raw material
Processing unit includes coal dust with calcium based raw material entrance and coal dust and the outlet of calcium based raw material mixed type ball, the coal dust and calcium based raw material
Mixed type ball is exported and the coal dust is connected with calcium based raw material mixed type ball entrance, the coal dust and calcium based raw material pretreatment unit
Coal dust and calcium based raw material mixed type ball are obtained for process coal dust and calcium based raw material.
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 radiant tube is in staggered distribution with lower floor radiant tube.
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 calcium 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 is ceramic filter plate, for removing dust and accumulation of heat in the raw coke oven gas.
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
Conveying device is connected with the pyrolysis solid pelletizing outlet；The high temperature conveying device is heat-preserving container or insulation carrier bar.
With the pyrolysis of calcium based raw material mixing pelletizing be coupled coal with coal hydrogenation gasification and calcium carbide production technology by the utility model,
Using coal and the calcium based raw material advantage that pyrolysis gas quality is high obtained by copyrolysis in preheating furnace, hydrogen content is high, in production calcium carbide
Meanwhile, 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,
Improve system thermal efficiency.
Using system of the present utility model, following effect is achieved：
(1) using being pyrolyzed without heat carrier heat accumulating type preheating furnace, heat utilization efficiency can be not only 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 can direct reuse, work after purification gas
It is 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 directly as the hydrogen source of hydropyrolysis unit after high temperature purification
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 that pyrolysis is produced directly enters furnace of calcium carbide through sealed thermal insulating conveying device, can make full use of heat
The sensible heat of solid is solved, the energy consumption of calcium carbide production is further reduced.
Additional aspect of the present utility model and advantage will be set forth in part in the description, partly by from following description
In become obvious, or by it is of the present utility model practice recognize.
Brief description of the drawings
Fig. 1 is production technological process of the present utility model；
Fig. 2 is production system schematic diagram of the present utility model.
Specific embodiment
Below in conjunction with drawings and Examples, specific embodiment of the present utility model is described in more details, with
Just better understood when the advantage of scheme of the present utility model and its various aspects.However, specific implementations described below side
Formula and embodiment are only descriptive purposes, rather than to limitation of the present utility model.
The utility model proposes a kind of pyrolysis of coal, hydrogasification and calcium carbide production coupling method, such as Fig. 1, including with
Lower step：
The first step：Coal dust is pyrolyzed with calcium based raw material mixing pelletizing：Will coal dust and calcium based 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 calcium based raw material mixed type ball：Middle low-order coal is carried out with calcium based raw material first
Crushing and screening, middle low-order coal is crushed to<1mm；Calcium based raw material is crushed to<3mm；Then by coal dust, calcium based 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 calcium based raw material and coal dust
Mass ratio is 0.8-1.2:1；
Second step：Raw coke oven gas is purified：It is pyrolyzed the raw coke oven gas for producing and enters gas purification units, filtered by solid bed,
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：To there is hydrogasification in the purified gas sent using clean unit anti-as hydrogen source, with coal dust
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：Calcium carbide is produced：The warm closed conveying device feeding electricity of high-temp solid pelletizing that preheating furnace pyrolysis is produced
Stone stove, is heated to 1800-2200 DEG C in furnace of calcium carbide, smelts and liquid calcium carbide and calcium carbide furnace gas are obtained.
The utility model proposes the system of a kind of pyrolysis of coal, hydrogasification and calcium carbide production coupling, such as Fig. 2：
System for producing calcium carbide described by the utility model is added by preheating furnace pyrolysis unit 1, raw coke oven gas clean unit 2, coal
Hydrogen gasification unit 3 and calcium carbide are smelted unit 4 and are constituted.
The device of preheating furnace pyrolysis unit can be mixed with calcium based 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 calcium based 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
Raw coke oven gas entrance 21 is stated 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 and catalytic cracking of tar catalyst layer 24 that are arranged in order from the bottom up；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 by the tar in raw coke oven gas it is sufficiently catalytic obtain pyrolysis gas and tar light oil；
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；
The device that calcium carbide smelts unit 4 can be furnace of calcium carbide, be provided with high-temp solid pelletizing entrance 41, calcium carbide furnace gas outlet 42
With calcium 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 conveying device can be the one kind in heat-preserving container or insulation carrier bar.
Below with reference to specific embodiment, the utility model is described, it is necessary to explanation is, embodiment is only description
Property, and the utility model is limited never in any form.
Embodiment 1
Using system of the present utility model, middle low-order coal and lime stone are first carried out into crushing and screening, middle low-order coal is crushed
Extremely<1mm；Limestone crushing is extremely<2mm；Then coal dust, lime stone and binding agent are mixed, and it is compressing, obtain coal dust and stone
Lime stone mixed type ball；Wherein, the addition of binding agent is mixed material 1.0wt%, and lime stone is with the addition mass ratio of coal dust
0.8:1。
Then coal dust and lime stone mixed type ball are sent 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 to purification at high temperature
Reactor, it is 750 DEG C to keep reactor temperature, 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；The gas is finally sprayed 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, done after purification separation into
One step is utilized；The high-temp solid pelletizing that preheating furnace pyrolysis unit is obtained sends into calcium carbide smelting device through sealed thermal insulating conveying equipment,
Smelted at 1800 DEG C and obtain calcium 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 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 to purification at high temperature
Reactor, it is 850 DEG C to keep reactor temperature, 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；The gas is finally sprayed 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, done after purification separation into
One step is utilized；The high-temp solid pelletizing that preheating furnace pyrolysis unit is obtained sends into calcium carbide smelting device through sealed thermal insulating conveying equipment,
Smelted at 2000 DEG C and obtain calcium 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 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 to purification at high temperature
Reactor, it is 700 DEG C to keep reactor temperature, 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；The gas is finally sprayed 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, done after purification separation into
One step is utilized；The high-temp solid pelletizing that preheating furnace pyrolysis unit is obtained sends into calcium carbide smelting device through sealed thermal insulating conveying equipment,
Smelted at 2200 DEG C and obtain calcium 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 lime, middle low-order coal is crushed to<1mm；Lime is crushed to<3mm；Then by coal dust, lime and bonding
Agent mixes, and compressing, obtains coal dust and lime mixed type ball；Wherein, the addition of binding agent is mixed material
8.0wt%, lime is 1.2 with the addition mass ratio of coal dust:1.
Then coal dust and lime mixed type ball are sent 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 to purification at high temperature
Device is answered, it is 900 DEG C to keep reactor temperature, and 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；The gas is finally sprayed 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, is done after purification separation into one
Step is utilized；The high-temp solid pelletizing that preheating furnace pyrolysis unit is obtained sends into calcium carbide smelting device through sealed thermal insulating conveying equipment,
Smelted at 2000 DEG C and obtain calcium carbide.
Claims (5)
1. a kind of system for processing coal dust and calcium based raw material, including pyrolysis unit, gas purification units, hydrogasification unit and
Calcium carbide smelts unit；Wherein,
The pyrolysis unit includes coal dust and calcium based 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 calcium based 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 are used to that raw coke oven gas process to obtain purified 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 calcium carbide smelts unit includes high-temp solid pelletizing entrance, calcium carbide furnace gas outlet and calcium carbide outlet, the high-temp solid
Pelletizing entrance is connected with pyrolysis solid pelletizing outlet, and the calcium 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 calcium based raw material pretreatment unit, and the coal dust includes coal with calcium based raw material pretreatment unit
Powder and calcium based raw material entrance and coal dust are exported with calcium based raw material mixed type ball, the coal dust exported with calcium based raw material mixed type ball and
The coal dust is connected with calcium based raw material mixed type ball entrance, and the coal dust is used for coal dust and calcium with calcium based raw material pretreatment unit
Based raw material process and obtains coal dust and calcium based 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 be 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 radiant tube with
Lower floor's radiant tube 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 calcium 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 is ceramic filter plate, for removing dust and accumulation of heat in the raw coke oven gas；
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 conveying device is heat-preserving container or insulation carrier bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621328806.4U CN206266492U (en) | 2016-12-06 | 2016-12-06 | A kind of system for processing coal dust and calcium based raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621328806.4U CN206266492U (en) | 2016-12-06 | 2016-12-06 | A kind of system for processing coal dust and calcium based raw material |
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| Publication Number | Publication Date |
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| CN206266492U true CN206266492U (en) | 2017-06-20 |
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ID=59044338
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| CN201621328806.4U Expired - Fee Related CN206266492U (en) | 2016-12-06 | 2016-12-06 | A kind of system for processing coal dust and calcium based raw material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106635096A (en) * | 2016-12-06 | 2017-05-10 | 神雾环保技术股份有限公司 | System and method for treating pulverized coal and calcium-based raw material |
-
2016
- 2016-12-06 CN CN201621328806.4U patent/CN206266492U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106635096A (en) * | 2016-12-06 | 2017-05-10 | 神雾环保技术股份有限公司 | System and method for treating pulverized coal and calcium-based raw material |
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