CN205953496U - System for preparation hydrogen -rich gas and carbide - Google Patents
System for preparation hydrogen -rich gas and carbide Download PDFInfo
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- CN205953496U CN205953496U CN201620790563.XU CN201620790563U CN205953496U CN 205953496 U CN205953496 U CN 205953496U CN 201620790563 U CN201620790563 U CN 201620790563U CN 205953496 U CN205953496 U CN 205953496U
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Abstract
The utility model relates to a system for preparation hydrogen -rich gas and carbide. The system includes pyrolysis unit, catalytic reforming unit, transform, decarbonization unit and calcium carbide smelting unit, and the pyrolysis unit includes inlet of coal powder, calcium base feed inlet, outlet of raw coke oven gas and high temperature hybrid powder outlet, the catalytic reforming unit includes inlet of raw coke oven gas and synthetic gas export, transform, decarbonization unit include synthetic gas entry and hydrogen -rich gas export, the calcium carbide smelting unit includes solid material entry, oxygen containing gas entry and carbide export for oxygen hot method preparation carbide, solid material entry with the high temperature hybrid powder outlet of pyrolysis unit links to each other. The utility model discloses a system for preparation hydrogen -rich gas and carbide had both utilized the heat of pyrolysis gas, turned hydrogen -rich gas with the complicated pyrolysis cyclostrophic of composition again.
Description
Technical field
The utility model relates generally to the production field of calcium carbide, more particularly, to a kind of prepare hydrogen-rich gas and calcium carbide be
System.
Background technology
With in powdery, low-order coal and powdery quick lime first pass through for raw material that to be pyrolyzed to obtain high temperature active half defocused, then by oxygen heat
The technique that method prepares calcium carbide is widely studied.This technique all achieves great prominent in terms of cost of material and the thermal efficiency
Broken.But, in the process, after pyrolysis, the heat of active carbocoal is fully used, and the big calorimetric entrained by raw coke oven gas
Amount is cooled in subsequent separation process to be wasted.In addition, in the carbide acetylene chemical process of continual exploitation, calcium carbide is anti-with water
Should, produce substantial amounts of carbide slag (main component is calcium hydroxide), if the wasting of resources cannot be not only resulted in effectively utilizes, also
Adverse circumstances can be caused to surrounding environment.
Meanwhile, pyrolysis of coal produce pyrolysis gas in contain substantial amounts of methane and carbon monoxide, and methane vapor reforming and
CO shift reaction is the industrial at present more ripe method containing methane and carbon monoxide gas preparing hydrogen-rich gas, and it is main
Reaction includes methane and vapor reacts to obtain carbon monoxide and hydrogen, and carbon monoxide and vapor react carbon dioxide processed and
Hydrogen.Temperature in view of type ball high temperature pyrolysis gained pyrolysis gas is close with methane-steam reforming, if by pyrolysis gas
Methane and carbon monoxide hydrogen is converted into by steam reforming reaction and transformationreation, then pyrolysis gas can be changed into rich H2Gas
Body.
In addition, because be required to vapor in methane vapor reforming and carbon monoxide transformation process, therefore can be
As interpolation part carbide slag in the quick lime of calcium carbide raw materials for production.So the calcium oxide in carbide slag can not only be changed into former
Material, reduces cost of material moreover it is possible to make the water in carbide slag equally be changed into the raw material of pyrolysis gas high-temperature catalytic reaction, can save power down
The step that rock ballast starches drying and calcination, saves energy consumption further.
Therefore, for the problems referred to above it is necessary to a kind of system preparing hydrogen-rich gas and calcium carbide of utility model, can be abundant
Using the energy of the composition in raw material and pyrolysis gas, it is translated into the higher gas products of added value.
Utility model content
For the problems referred to above, the utility model aims to provide a kind of system preparing hydrogen-rich gas and calcium carbide, this system
Purpose is thermal loss entrained by pyrolysis gas when solving to produce calcium carbide, the low problem of pyrolysis gas utilization ratio.Further, this reality
With the new cost that also can reduce carbide raw material, make full use of carbide slag.
The utility model provide prepare hydrogen-rich gas and the system of calcium carbide includes：High temperature pyrolysis unit, catalytic reforming list
Unit, conversion, decarburization unit and calcium carbide smelt unit, and wherein, described high temperature pyrolysis unit includes coal powder entrance, calcium based raw material enters
Mouth, raw coke oven gas outlet and the outlet of high temperature mixed powder, for the pyrolysis of carbide raw material；Described catalytic reforming units include raw coke oven gas
Entrance and syngas outlet, for the catalytic reforming of methane and vapor；Described raw coke oven gas entrance and described high temperature pyrolysis unit
Raw coke oven gas outlet be connected；Described conversion, decarburization unit include synthesis gas entrance and hydrogen-rich gas outlet, for carbon monoxide
Catalytic shift reaction and the carbonization treatment generating gas；Described synthesis gas entrance and the syngas outlet of described catalytic reforming units
It is connected；Described calcium carbide is smelted unit and is included solid material inlet, oxygen-containing gas entrance and calcium carbide outlet, prepares electricity for the hot method of oxygen
Stone；Described solid material inlet is connected with the high temperature mixed powder outlet of described high temperature pyrolysis unit.
Above-mentioned system, described catalytic reforming units be reforming reactor, be sequentially provided with from the bottom up inside it filter layer,
The catalyst layer of catalytic cracking of tar, the catalyst layer of methane reforming.
Above-mentioned system, described conversion, decarburization unit include change furnace, are provided with transformation catalyst inside described change furnace
Layer.
Above-mentioned system, described system also includes heat-insulation conveying device, and described heat-insulation conveying device is smelted with described calcium carbide
The high temperature mixed powder outlet of the solid material inlet of unit and described high temperature pyrolysis unit is connected.
Further, in above-mentioned system, described high temperature pyrolysis unit is heat accumulating type descending-bed reactor, its internal setting
There is multilayer heat accumulation type radiant tube.
Further, described system may also include material processing unit, and described material processing unit includes sequentially being connected
Warehouse and pulverized coal screw conveying device in the middle of coal breaker, coal, and sequentially connected calcium based raw material breaker, calcium base
Warehouse, calcium base feed powder helix transporting device in the middle of material.
The technical solution of the utility model is so that carry the vapor of high temperature with pyrolysis gas in catalytic reforming reactor and change
After changing catalytic reaction in stove, finally give hydrogen-rich gas, on the one hand can make full use of the heat of pyrolysis gas, on the other hand permissible
The pyrolysis gas of complicated component are converted into hydrogen-rich gas.
The utility model also can use part carbide slag to substitute calcium oxide so that carbide slag is turned waste into wealth, and needs not move through carbon
Change and calcining step, reduce cost of material.Meanwhile, decompose the methane in the vapor producing and pyrolysis gas using calcium hydroxide
And reaction of carbon monoxide, because the vapor that calcium hydroxide decomposition produces is more, it is possible to reduce the carbon distribution of catalyst, extend catalysis
The life-span of agent.
Further, the high temperature mixed powder being pyrolyzed generation in the utility model can be incubated and is transported to furnace of calcium carbide, improve
The efficiency of utilization of system.
The utility model produces calcium carbide by the hot method of oxygen, and raw material is smelted unit from pyrolysis to calcium carbide and is always powder, saves
Forming unit, simplifies system and operational sequence, and improves the reaction contact area between raw material, thus improves heat transfer effect
Rate.
Brief description
Fig. 1 is the system structure diagram preparing hydrogen-rich gas and calcium carbide of the utility model embodiment；
Fig. 2 is the system flow chart preparing hydrogen-rich gas and calcium carbide of the utility model embodiment.
Specific embodiment
As shown in figure 1, the system for producing calcium carbide described by the utility model is by material processing unit 1, high temperature pyrolysis unit
2nd, catalytic reforming units 3, conversion, decarburization unit 4 and calcium carbide are smelted unit 5 and are formed.
In order to reduce cost of material and the effect giving full play to the system, the coal in the utility model is middle low order fine coal.
Material processing unit 1 is used for feed coal and lime or carbide slag are crushed, and it includes coal breaker 11, calcium base
Warehouse 13, the middle warehouse 14 of calcium based raw material, pulverized coal screw conveying device 15 and calcium base feed powder in the middle of raw material breaker 12, coal
Helix transporting device 16.Described breaker is connected with middle warehouse helix transporting device successively.Certainly in the utility model,
Material processing unit 1 is not required setting, can decide whether to arrange according to supplied materials size.
The device of high temperature pyrolysis unit 2 is fast pyrogenation stove, is provided with coal powder entrance 21, calcium based raw material entrance 22, raw coke oven gas
Outlet 23 and high temperature mixed powder outlet 24；Described coal powder entrance 21 can be connected with pulverized coal screw conveying device 15；Described calcium
Based raw material entrance 22 can be connected with calcium based raw material helix transporting device 16；Wherein said fast pyrogenation stove refers to that heat accumulating type is descending
Bed reactor, is internally provided with multilayer heat accumulation type radiant tube.After high temperature pyrolysis unit 2 is used for raw material to be pyrolyzed, output high temperature mixes
Powder and raw coke oven gas.
The device of catalytic reforming units 3 is reforming reactor, for being catalyzed the methane in pyrolysis gas and vapor
Reforming reaction, is provided with raw coke oven gas entrance 31 and syngas outlet 36.Described raw coke oven gas entrance 31 and the waste coal of high temperature pyrolysis unit 2
Gas outlet 23 is connected.It is provided with gas distributor 32 and the filter layer being arranged in order from the bottom up inside described reforming reactor
33rd, catalytic cracking of tar catalyst layer 34, methane reforming catalyst layer 35.Gas distributor 32 is used for allowing gas to enough more uniform
By catalyst layer.Described filter layer can be for ceramic filter plate it is therefore an objective to removing the dust in raw coke oven gas and playing accumulation of heat
Effect.The purpose of described catalytic cracking of tar catalyst is to obtain pyrolysis gas by sufficiently catalytic for the tar in raw coke oven gas.Described
The purpose of reforming catalyst layer is that the methane in catalysis pyrolysis gas is reacted with vapor, and methane is converted to hydrogen and an oxidation
Carbon.
Conversion, the device of decarburization unit 4 include change furnace and absorption unit of dioxide carbon, and the conversion for carbon monoxide is anti-
The carbonization treatment of gas and should be generated, so that hydrogen-rich gas is obtained, be provided with synthesis gas entrance 41 and hydrogen-rich gas outlet 44.Described conjunction
Gas entrance 41 is become to be connected with the syngas outlet 36 of catalytic reforming units 3.It is provided with gas distributor 42 He inside described change furnace
Transformation catalyst layer 43.Being disposed to of gas distributor 42 allow gas to enough more uniform by catalyst layer.Conversion is urged
The purpose of agent layer 43 is that catalytic CO carries out transformationreation, generates carbon dioxide enriched and hydrogen.Inhale through carbon dioxide again
After receiving apparatus slough carbon dioxide, hydrogen rich gas can be obtained.
The device that calcium carbide smelts unit 5 is air flow bed, generates calcium carbide for the hot method of oxygen, is provided with solid material inlet 51, contains
Carrier of oxygen entrance 52, calcium carbide furnace gas outlet 53 and calcium carbide outlet 54.The calcium carbide of melting is exported after 54 derivation through cold by carbide liquid
But form calcium carbide product.Described solid material inlet 51 can be by the high temperature mixed powder of heat-insulation conveying device and high temperature pyrolysis unit
Material outlet 24 is connected.Described heat-insulation conveying device can be one of heat-preserving container or insulation carrier bar.Setting heat-insulation conveying device
Can further improve the efficiency of utilization of system.This heat-insulation conveying device nor is it necessary that setting.
System flow chart as shown in Figure 2, discloses the utility model and prepares hydrogen-rich gas and calcium carbide using said system
Method, comprise the following steps：
Middle low-order coal is crushed to by pretreatment of raw material by breaker<1mm, calcium based raw material is crushed to<3mm；Certainly
This step is not required setting, specifically depending on supplied materials size.
Mixed pyrolysis, the coal of powdery, calcium based raw material are added powder pyrolysis installation, obtain raw coke oven gas and high temperature mixed powder
Material.Wherein, the addition of carbide slag is the 20wt%-40wt% of quick lime；Calcium based raw material with the addition mass ratio of coal dust is
1.0-1.5:1.Pyrolysis temperature is 800-1100 DEG C, and pyrolysis time is 15-45min.
Catalytic reforming, pyrolysis raw coke oven gas enters catalytic reforming units, through filtering, catalytic cracking of tar and methyl hydride catalyzed
Reformation obtains synthesis gas.Wherein, the temperature of catalytic reforming units is 700-900 DEG C；Pressure is 2-4MPa.
Catalytic shift, decarburization, the synthesis gas after catalytic reforming, further across transformationreation, convert carbon monoxide to
Hydrogen and carbon dioxide, then hydrogen-rich gas can be obtained after decarburization.The temperature of transformationreation is 200-320 DEG C, and used catalyst is
Co-Mo system resistant to sulfur width temperature catalyst.
The warm conveying device of high temperature mixed powder sends into calcium carbide smelting device, and smelts in the hot method of 1750-2200 DEG C of oxygen,
Prepared liquid calcium carbide and calcium carbide furnace gas.
According to technique scheme of the present utility model, the vapor of high temperature will be carried with pyrolysis gas in catalytic reforming reaction
After catalytic reaction in device and change furnace, finally give hydrogen-rich gas, on the one hand can make full use of the heat of pyrolysis gas, the opposing party
The pyrolysis gas of complicated component can be converted into hydrogen-rich gas by face.Further, the utility model also can use part carbide slag to substitute
Calcium oxide is so that carbide slag is turned waste into wealth, and needs not move through carbonization and calcining step, reduces cost of material.Meanwhile, using hydrogen
Calcium oxide decomposes methane and reaction of carbon monoxide in the vapor producing and pyrolysis gas, because calcium hydroxide decomposes the water producing
Steam is more, it is possible to reduce the carbon distribution of catalyst, extends the life-span of catalyst.
As expansion, the calcium carbide obtaining and water also can be reacted generation acetylene and carbide slag, carbide slag warp by the utility model
But also as raw material after purification, system can form closed cycle.
Further, the high temperature mixed powder being pyrolyzed generation in the utility model can be incubated and is transported to furnace of calcium carbide, further
Improve efficiency of utilization.
The utility model produces calcium carbide by the hot method of oxygen, and raw material is smelted unit from pyrolysis to calcium carbide and is always powder, saves
Forming unit, simplifies system and operational sequence, and improves the reaction contact area between raw material, thus improves heat transfer effect
Rate.
Herein presented " wt% " refers both to percentage by weight.
Embodiment 1
With jet coal and add 30wt% carbide slag quick lime as raw material, first pass through broken milling device by raw coal grain
Degree is crushed to<1mm, calcium based raw material particle size reduction arrives<3mm；Then by coal dust and calcium base feed powder with 1.0:1.0 mass ratio
Mixing delivers to high temperature pyrolysis device through helix transporting device, and is pyrolyzed 25min at 850 DEG C, obtains raw coke oven gas and high temperature mixing
Feed powder.Raw coke oven gas is fed directly to catalytic reforming conversion reactor at high temperature, keeps reactor temperature to be 800 DEG C, pressure
For 2MPa, raw coke oven gas sequentially passes through purifying and dedusting, catalytic cracking of tar obtains synthesis gas after reacting, and synthesis gas is transported to conversion
After catalytic shift at 320 DEG C in stove, finally make pyrolysis gas composition based on carbon dioxide and hydrogen, afterwards again through decarburization,
Obtain the rich H2 gas of high concentration；High temperature mixed powder is sent into calcium carbide through sealed thermal insulating conveying equipment and is smelted in unit, 1900
At DEG C, the hot method of oxygen generates calcium carbide；Follow-up calcium carbide can obtain a large amount of carbide slags after reacting with water, can be recycled for use as calcium carbide and produce after purification
Raw material.
Embodiment 2
With jet coal and add 20wt% carbide slag quick lime as raw material, first pass through broken milling device by raw coal grain
Degree is crushed to<1mm, calcium based raw material particle size reduction arrives<3mm；Then by coal dust and calcium base feed powder with 1.0:1.5 mass ratio
Mixing, delivers in high temperature pyrolysis device through helix transporting device and is pyrolyzed 30min at 900 DEG C, obtains raw coke oven gas and high temperature mixing
Powder.Raw coke oven gas is fed directly to catalytic reforming conversion reactor at high temperature, keeps reactor temperature to be 700 DEG C, pressure
For 4MPa, raw coke oven gas sequentially passes through purifying and dedusting, catalytic cracking of tar obtains synthesis gas after reacting, and synthesis gas is transported to conversion
After catalytic shift at 260 DEG C in stove, finally make pyrolysis gas composition based on carbon dioxide and hydrogen, afterwards again through decarburization,
Obtain the rich H of high concentration2Gas；High temperature mixed powder is sent into calcium carbide through sealed thermal insulating conveying equipment and is smelted in unit, 2000
At DEG C, the hot method of oxygen generates calcium carbide；Follow-up calcium carbide can obtain a large amount of carbide slags after reacting with water, can be recycled for use as calcium carbide and produce after purification
Raw material.
Embodiment 3
With jet coal and add 40wt% carbide slag quick lime as raw material, first pass through broken milling device by raw coal grain
Degree is crushed to<1mm, calcium based raw material particle size reduction arrives<3mm；Then by coal dust and calcium base feed powder with 1.0:1.25:0.12 matter
Amount ratio mixes, and delivers in high temperature pyrolysis device through helix transporting device and is pyrolyzed 30min at 1000 DEG C, obtains raw coke oven gas and height
Warm mixed powder.Raw coke oven gas is fed directly to catalytic reforming conversion reactor at high temperature, keeps reactor temperature to be 900
DEG C, pressure is 3MPa, and raw coke oven gas sequentially passes through purifying and dedusting, catalytic cracking of tar obtains synthesis gas after reacting, and synthesis gas is defeated
After delivering to catalytic shift at 200 DEG C in change furnace, finally make pyrolysis gas composition based on carbon dioxide and hydrogen, afterwards warp again
Cross decarburization, obtain the rich H of high concentration2Gas；High temperature mixed powder is sent in furnace of calcium carbide through sealed thermal insulating conveying equipment, 2000
At DEG C, the lower hot method of oxygen generates calcium carbide；Follow-up calcium carbide can obtain a large amount of carbide slags after reacting with water, can be recycled for use as calcium carbide life after purification
The raw material producing.
As seen from the above-described embodiment, what when the technical solution of the utility model solves production calcium carbide, pyrolysis gas wasted asks
Topic.Further, the utility model also can reduce the cost of carbide raw material, makes full use of carbide slag.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate the utility model example,
And the not restriction to embodiment.For those of ordinary skill in the field, also may be used on the basis of the above description
To make other changes in different forms.There is no need to be exhaustive to all of embodiment.And thus
The obvious change amplified out or change among still in protection domain of the present utility model.
Claims (6)
1. a kind of system preparing hydrogen-rich gas and calcium carbide, described system includes high temperature pyrolysis unit, catalytic reforming units, change
Change, decarburization unit and calcium carbide smelt unit, wherein,
Described high temperature pyrolysis unit includes coal powder entrance, calcium based raw material entrance, raw coke oven gas outlet and the outlet of high temperature mixed powder, uses
Pyrolysis in carbide raw material；Described catalytic reforming units include raw coke oven gas entrance and syngas outlet, for methane and vapor
Catalytic reforming；Described raw coke oven gas entrance is connected with the raw coke oven gas outlet of described high temperature pyrolysis unit；
Described conversion, decarburization unit include synthesis gas entrance and hydrogen-rich gas outlet, for the catalytic shift reaction of carbon monoxide
With the carbonization treatment generating gas；Described synthesis gas entrance is connected with the syngas outlet of described catalytic reforming units；
Described calcium carbide is smelted unit and is included solid material inlet, oxygen-containing gas entrance and calcium carbide outlet, prepares electricity for the hot method of oxygen
Stone；Described solid material inlet is connected with the high temperature mixed powder outlet of described high temperature pyrolysis unit.
2. system according to claim 1 is it is characterised in that described catalytic reforming units are reforming reactor, inside it
It is sequentially provided with filter layer, the catalyst layer of catalytic cracking of tar, the catalyst layer of methane reforming from the bottom up.
3. system according to claim 1 is it is characterised in that described conversion, decarburization unit include change furnace, described conversion
Furnace interior is provided with transformation catalyst layer.
4. system according to claim 1 is it is characterised in that described system also includes heat-insulation conveying device, described insulation
Conveying device and described calcium carbide smelt the solid material inlet of unit and the high temperature mixed powder outlet of described high temperature pyrolysis unit
It is connected.
5. system according to claim 1 is it is characterised in that described high temperature pyrolysis unit reacts for heat accumulating type down-flow fluidized bed using ECT
Device, it is internally provided with multilayer heat accumulation type radiant tube.
6. system according to claim 1 is it is characterised in that described system also includes material processing unit, described raw material
Warehouse and pulverized coal screw conveying device in the middle of coal breaker that processing unit includes sequentially being connected, coal, and be sequentially connected
Warehouse, calcium base feed powder helix transporting device in the middle of calcium based raw material breaker, calcium based raw material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620790563.XU CN205953496U (en) | 2016-07-25 | 2016-07-25 | System for preparation hydrogen -rich gas and carbide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620790563.XU CN205953496U (en) | 2016-07-25 | 2016-07-25 | System for preparation hydrogen -rich gas and carbide |
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| Publication Number | Publication Date |
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| CN205953496U true CN205953496U (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620790563.XU Withdrawn - After Issue CN205953496U (en) | 2016-07-25 | 2016-07-25 | System for preparation hydrogen -rich gas and carbide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106276903A (en) * | 2016-07-25 | 2017-01-04 | 神雾环保技术股份有限公司 | A kind of system and method preparing hydrogen-rich gas and carbide |
-
2016
- 2016-07-25 CN CN201620790563.XU patent/CN205953496U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106276903A (en) * | 2016-07-25 | 2017-01-04 | 神雾环保技术股份有限公司 | A kind of system and method preparing hydrogen-rich gas and carbide |
| CN106276903B (en) * | 2016-07-25 | 2018-04-10 | 神雾环保技术股份有限公司 | A kind of system and method for preparing hydrogen-rich gas and calcium carbide |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170215 Effective date of abandoning: 20180410 |