CN206902071U - It is a kind of to prepare the air flow bed pyrolysis oven vented one's spleen rich in methane thermal and system - Google Patents
It is a kind of to prepare the air flow bed pyrolysis oven vented one's spleen rich in methane thermal and system Download PDFInfo
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Abstract
The air flow bed pyrolysis oven vented one's spleen rich in methane thermal is prepared the utility model discloses a kind of fine coal, it includes burner hearth (3) and the entrance cavity (1) located at the burner hearth (3) above, separated at the top of the burner hearth (3) between the entrance cavity (1) by dividing plate (2), dispersion hole is evenly distributed with the dividing plate (2), entrance cavity (1) side is provided with gas heat carrier import (7), and the process burner (4) of tubular is provided with inside the entrance cavity (1).The system vented one's spleen rich in methane thermal is prepared the invention also discloses a kind of pulverized coal pyrolysis, the system includes the air flow bed pyrolysis oven, and gasification furnace or oxidation furnace.During work, gas heat carrier cocurrent can flow downward with fine coal in the burner hearth, direct contact heat transfer, can effectively improve the heat transfer efficiency between pulverized coal particle and thermal source, make fine coal that fast pyrogenation reaction and secondary cracking occur, the yield of thermal decomposition product small molecular hydro carbons can be effectively increased.
Description
Technical field
It the utility model is related to a kind of device for preparing and being vented one's spleen rich in methane thermal, and in particular to one kind is prepared rich in methane thermal
The air flow bed pyrolysis oven and system vented one's spleen.
Background technology
Natural gas is the important source material of industrial process and civilian process, and preparing natural gas as raw material using coal is advantageous to alleviate me
The natural gas supply and demand that state faces at present is nervous.In traditional gasification process, coal is synthesis first by vapor-oxygen gasified
Gas, then purified, conversion, methanation and sub-prime upgrading, can just obtain natural gas.The most important and most basic unit of this technique
It is the selection of gasification furnace.
Common natural gas from coal factory is typically using Lurgi moving bed lump coal pressurized gasifications technology production high methane content
Synthesis gas as prepare synthetic natural gas raw material.Using Lurgi gasification furnaces as the thick of the moving bed crushed coal pressure gasifying of representative
Methane content is high in coal gas, and this portion of methane accounts for the half of methane in final products synthetic natural gas, for natural gas from coal
For there is very big advantage.But the technology has the disadvantages that：Single furnace gas small scale；Diameter<5mm coal can not enter
Gasification furnace；Lurgi gasifier steam decomposition rate is low；Gasification waste water amount is big, complicated component, contains the pollutants such as tar, naphthalene and phenol, waste water
Processing is difficult.
Entrained flow gasification no matter dry powder gasification or coal water slurry gasification, have good commercial Application, coal feeding amount is big, technology
It is mature and stable, there is the experience run steadily in the long term.But gasification furnace outlet syngas temperatures are very high, wherein being practically free of first
Alkane, and H2/ CO is huge for follow-up synthesis air cooling and methanation device investment than low.
Pyrolysis of coal is an extremely complex process, with chemical reaction type, can be classified as cracking and the major class of polycondensation two
Reaction.Pyrolysis of coal is coal process change, such as burns, gasifies, the pilot process that liquefaction technique is particularly important.In the pyrolysis of coal
The composition influence of Cheng Zhong, temperature and heating rate on pyrolysis of coal product is very big, when the final temperature of heating is relatively low (about 500~600 DEG C)
When, increase heating rate, volatile producibility can be improved and increase the ratio of wherein product liquid and gaseous product；When heating
During final temperature higher (about 800~1100 DEG C), increase heating rate, the yield of volatile matter can be improved further, but wherein liquid
The ratio of product and gaseous product can reduce on the contrary.The pyrolytic process of coal can produce CH4, in 500~700 DEG C of pyrolysis temperature ranges
It is interior, under inert atmosphere conditions, CH4Formation be mainly derived from during pyrolysis of coal caused by five kinds of presomas：Methoxyl group in coal
Fracture, the fracture of alkyl side chain, the fracture of methyl, the secondary pyrolysis of volatile matter, the reduction reaction of aromatic heterocyclic on aromatic rings.
Above-mentioned five kinds of presomas mainly produce in 500~700 DEG C.When with some reducibility gas, such as H2, the gas such as CO, carry out generation
After inert atmosphere, the cracking process of pyrolysis of coal free radical can be promoted, influence methyl and methylene chain break in texture of coal, from
And promote CH4Formation.The growth of gas residence time, be advantageous to the secondary cracking of tar molecules, generate CH4、C2H4Deng hydro carbons
Component.
Existing coal pyrolysis stove, pyrolysis temperature use fluid bed more typically at 470~900 DEG C, to improve pyrolysis rate
Form, be improve the thermal efficiency use internal heat type method, due to heat carrier (flue gas, semicoke, circulating ash, air etc.) itself
Limitation, thermal decomposition product separates difficulty with heat carrier, it is inadequate to often lead to thermal decomposition product purity.It is hot when being used as using inert atmosphere
During carrier, stablize fragment group caused by pyrolysis of coal due to enough hydroperoxyl radicals can not be provided, so as to which pyrolysis production can be reduced
The yield of hydrocarbon gas and tar light oil in thing.In addition, when using hydrogen as heat carrier, although can improve in thermal decomposition product
The yield of hydrocarbon gas and tar light oil but it can also greatly increase process costs.Those skilled in the art are directed to exploitation one always
Kind is used for pulverized coal pyrolysis device, to prepare the yield that the pyrolysis gas rich in methane improves wherein methane, meets that follow-up methane turns
Change process.
Utility model content
Therefore, CH in the pyrolysis gas prepared for pulverized coal pyrolysis stove in the prior art4、C2H4Deng the relatively low skill of hydrocarbon content
Art problem, the purpose of this utility model are that providing a kind of fine coal prepares the air flow bed pyrolysis oven vented one's spleen rich in methane thermal, is used for
Make fine coal fast pyrogenation, prepare the pyrolysis gas rich in methane.
Air flow bed pyrolysis oven of the present utility model includes the burner hearth (3) erect and the entrance located at the burner hearth (3) above
Chamber (1), burner hearth (3) interlude is straight barrel type, and burner hearth (3) bottom is provided with outlet (5), at the top of the burner hearth (3) and
Separated between the entrance cavity (1) by dividing plate (2), dispersion hole, the entrance cavity (1) are evenly distributed with the dividing plate (2)
Top is provided with burner flange (6), and entrance cavity (1) side is provided with gas heat carrier import (7), and the entrance cavity (1) is internal
Process burner (4) provided with tubular, process burner (4) upper end pass through the burner flange (6), and lower end passes through the dividing plate
(2)。
During the air flow bed pyrolysis oven work, using main component as reducibility gas (H2, CO etc.) high-temperature gas mixture body
For gas heat carrier (gas thermal source), by gas heat carrier pass sequentially through the gas heat carrier import (7), entrance cavity (1), every
The dispersion hole of plate (2) introduces burner hearth (3)；Meanwhile fine coal to be pyrolyzed is introduced into burner hearth (3) by technique nozzle (4).Air heat
The cocurrent in burner hearth (3) flows downward carrier with fine coal, in flow process, gas heat carrier and fine coal direct contact heat transfer,
The heat transfer efficiency between pulverized coal particle and thermal source can be effectively improved, increases the heating rate of fine coal, the heating rate of the process
More than 100K/s, in the range of fast pyrogenation and flashing speed oven, it can make fine coal that fast pyrogenation reaction occur.Due to gas thermal source with
Based on reducibility gas, under high-temperature reductibility environment heat scission reaction will further occur for the product of fine coal fast pyrogenation, heat
The secondary conversion of product (macromolecule hydrocarbon such as tar) is solved, thermal decomposition product small molecular hydro carbons (CH can be effectively increased4、C2H4Deng)
Yield.Additionally by the volume flow of regulation gas heat carrier, residence time of the fine coal in stove can be controlled, to promote coal
CH in pyrolytic process4Generation, improve pyrolysis of coal in CH4Yield, so as to prepare the pyrolysis gas of methane rich content.Pulverized coal pyrolysis
After can obtain gas solid product, gas solid product is from outlet (5) discharge, and wherein gas is the pyrolysis gas rich in methane, Gu
Body is semicoke, and for semicoke granularity below 100 μm, gasification reactivity is good.Therefore, the air flow bed pyrolysis oven can be with existing air-flow
Bed gasification furnace or oxidation furnace are used cooperatively, and connection forms the circulatory system.Gas in gas solid product can oxidized stove part
Oxidation, obtained high-temperature gas send the air flow bed pyrolysis oven back to as gas heat carrier.Semicoke in gas solid product can be through
Gasification furnace gasifies, and obtained high-temperature synthesis gas can also send the air flow bed pyrolysis oven back to as gas heat carrier.
Preferably, the burner hearth (3), the process burner (4) and the entrance cavity (1) coaxial line.
Preferably, the side wall of the burner hearth (3) and the entrance cavity (1) is provided with refractory liner, the refractory liner is resistance to
Lining of fire-bricks or water-cooling wall.
Preferably, the process burner (4) has the cooling layer for being used for leading to burner cooling water outside, the cooling layer outside is attached
There is aluminosilicate heat-preservation cotton.The cooling layer and the aluminosilicate heat-preservation cotton can play heat-insulated effect, avoid gas heat carrier and
Heat exchange is carried out before fine coal mixing.
Preferably, burner hearth (3) the direct tube section internal diameter (D1) and the ratio of the burner hearth (3) straight tube segment length (H1) are
D1:H1=0.05~0.2.The draw ratio of the burner hearth (3) direct tube section is arranged to above range, it is gentle to be advantageous to extension fine coal
Residence time of the body heat carrier in the burner hearth (3), be advantageous to the secondary cracking of tar molecules, and then improve CH4、C2H4Deng
The yield of hydrocarbon component.
Preferably, burner hearth (3) bottom is tapered, the inclination angle (α) of tapered sidewalls is 30~60 °；The outlet (5)
The ratio of internal diameter (D2) and the burner hearth (3) direct tube section internal diameter (D1) is D2:D1=0.1~0.5.Burner hearth (3) bottom is set
Put the tapered solid outflow for being easy to deposition；The internal diameter (D2) of the outlet (5) is controlled, the flow of gas-solid product can be controlled,
The residence time of fine coal and gas heat carrier in the burner hearth (3) can also be controlled simultaneously.
Another object of the present utility model is that providing a kind of pulverized coal pyrolysis prepares the system vented one's spleen rich in methane thermal, and it is wrapped
Described air flow bed pyrolysis oven is included, it also includes gas heat carrier feedway, and the gas heat carrier feedway is：
Gasification furnace, provided with being pyrolyzed, solid inlet is gentle to dissolve mouth, the outlet (5) of burner hearth (3) bottom to the gasification furnace
Pyrolysis solid in the gas solid product of discharge can add the gasification furnace, the gasification outlet by the pyrolysis solid inlet
Connected by pipeline and the gas heat carrier import (7)；The gasification furnace can be selected existing powder, coke etc. of being used for and gasify
Airflow bed gasification furnace；
Or oxidation furnace, the oxidation furnace is provided with pyrolysis gas entrance and combustion gas exports, the outlet of burner hearth (3) bottom
(5) pyrolysis gas in the gas solid product of discharge adds the oxidation furnace by the pyrolysis solid inlet, and the combustion gas goes out
Mouth passes through pipeline and the gas heat carrier import (7) is connected.The oxidation furnace is used for (the not exclusively combustion of pyrolysis gas partial oxidation
Burn)；Existing combustion furnace can be selected in the oxidation furnace.
A further object of the present utility model is that providing a kind of pulverized coal pyrolysis prepares the method vented one's spleen rich in methane thermal, described
Method has used described air flow bed pyrolysis oven, is specially：
Main component is passed sequentially through into gas heat carrier import (7), entrance cavity for the gas heat carrier of reducibility gas
(1), the dispersion hole of dividing plate (2) introduces burner hearth (3)；Meanwhile fine coal is introduced into burner hearth (3) by technique nozzle (4)；Air heat carries
The direct heat transfer in burner hearth (3) contacts body with fine coal, and fast pyrogenation reaction occurs for fine coal, because gas heat carrier is with reproducibility gas
Based on body, under high-temperature reductibility environment heat scission reaction further occurs for the product of fine coal fast pyrogenation, smaller so as to generate
The hydrocarbons of molecule；Obtained gas solid product is finally pyrolyzed to discharge from outlet (5).
Preferably, the fine coal is fine coal of the particle diameter less than 100 μm of dry powder state, passes through technique with carrier gas conveying during introducing
Nozzle (4) enters, and the carrier gas can be nitrogen, CO2, pyrolysis gas, synthesis gas etc..
The gas heat carrier is the high-temperature gas after the gasification or oxidation of carbon compound.Temperature preferably 1000~130
℃.The preferred coal of carbon compound, petroleum coke, biomass, rubbish and other carbonaceous solids discarded objects.
Preferably, the gas heat carrier is the solid (semicoke) in the gas solid product of outlet (5) discharge through gasification furnace
High-temperature synthesis gas caused by gasification.
Or it is preferable, described gas heat carrier is the partial thermal decomposition gas warp in the gas solid product of outlet (5) discharge
High-temperature gas caused by oxidation furnace imperfect combustion.
The beneficial effects of the utility model are：
1st, the air flow bed pyrolysis oven of fine coal preparation methane rich pyrolysis gas of the present utility model includes the burner hearth of straight barrel type and entered
Oral cavity, during work, the gas heat carrier of reproducibility can enter the entrance cavity (1) through the gas heat carrier entrance (7), described
Entrance cavity (1) can play a part of gas buffer, and then gas heat carrier enters the stove by the dispersion hole of the dividing plate (2)
In thorax (3), while fine coal to be pyrolyzed is introduced by the process burner (4), and gas heat carrier is with fine coal in the burner hearth (3)
Middle cocurrent flows downward.On the one hand, in flow process, gas heat carrier and fine coal direct contact heat transfer, can effectively improve
Heat transfer efficiency between pulverized coal particle and thermal source, increase the heating rate of fine coal, can make fine coal that fast pyrogenation reaction and two occur
Secondary cracking, it is effectively increased thermal decomposition product small molecular hydro carbons (CH4、C2H4Deng) yield.On the other hand, made with gas heat carrier
For thermal source heat, fire box temperature can be made to be evenly distributed, be advantageous to thermal decomposition product and secondary pyrolytic reaction formation small molecule hydro carbons occurs
Compound.Additionally by the volume flow of regulation gas heat carrier, residence time of the fine coal in stove can be controlled, to promote coal hot
CH in solution preocess4Generation, improve pyrolysis of coal in CH4Yield, so as to prepare the pyrolysis gas of methane rich content.
2nd, it is the pyrolysis gas rich in methane that the gas in gas solid product can be obtained after pulverized coal pyrolysis, can oxidized stove part
Oxidation, obtained high-temperature gas send the air flow bed pyrolysis oven back to as gas heat carrier.Semicoke granularity in gas solid product
Below 100 μm, gasification reactivity is good, can gasify through gasification furnace, and obtained high-temperature synthesis gas can also be sent back to as gas heat carrier
The air flow bed pyrolysis oven.Therefore, the air flow bed pyrolysis oven can form the circulatory system with existing oxidation furnace or gasification furnace,
Can effectively solve the problems, such as the supply of gas heat carrier, it is not necessary to which raw material in addition prepares the reducibility gas of high temperature, saves significantly
The about energy and equipment cost.
Brief description of the drawings
Fig. 1 is the schematic diagram of the air flow bed pyrolysis oven of the present utility model for preparing and being vented one's spleen rich in methane thermal.
Reference
1- entrance cavities；2- dividing plates；3- burner hearths；4- process burners；5- is exported；6- burner flanges；7- gas heat carrier imports；
S1- gas heat carriers；S2- fine coal；S3- burner cooling waters；S4- gas solid products.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail.It should be understood that following examples are only used for
Bright the utility model is not for restriction the scope of the utility model.
The fine coal of embodiment 1 prepares the air flow bed pyrolysis oven vented one's spleen rich in methane thermal
Fig. 1 show being prepared available for fine coal fast pyrogenation for the preferred embodiment of the utility model one and vented one's spleen rich in methane thermal
Air flow bed pyrolysis oven, it includes burner hearth 3 and entrance cavity 1, and entrance cavity 1 is above burner hearth 3, the side wall of burner hearth 3 and entrance cavity 1
Be lined with refractory material (refractory brick), burner hearth 3 is straight barrel type and bottom is provided with outlet 5, between burner hearth 3 and entrance cavity 1 by every
Plate 2 is separated, and dispersion hole is evenly distributed with dividing plate 2, and the top of entrance cavity 1 is provided with burner flange 6, and the side of entrance cavity 1 is provided with gas
Heat carrier import 7, the inside of entrance cavity 1 are provided with the process burner 4 of tubular, and the upper end of process burner 4 passes through burner flange 6, and lower end is worn
Cross dividing plate 2.Wherein burner hearth 3, process burner 4 and the coaxial line of entrance cavity 1.Has cooling layer outside process burner 4, cooling layer outside is attached
There is aluminosilicate heat-preservation cotton.
Preferably, the direct tube section internal diameter D1 of the burner hearth 3 and straight tube segment length H1 of burner hearth 3 ratio is D1:H1=0.05~0.2.
Preferably, the bottom of burner hearth 3 is tapered, the inclination alpha of tapered sidewalls is 30~60 °；The internal diameter D2 of outlet 5 and burner hearth 3
Direct tube section internal diameter D1 ratio is D2:D1=0.1~0.5.
During real work, by gas heat carrier S1 from gas heat carrier 7 passes sequentially through entrance cavity 1, the dispersion hole of dividing plate 2 is drawn
Enter burner hearth 3；Meanwhile fine coal S2 is introduced into burner hearth 3 by technique nozzle 4；Lead to burner cooling outside process burner 4 in attached cooling layer
Water S3, fine coal S2 is avoided to be thermally contacted in advance with gas heat carrier S1.Gas heat carrier S1 and fine coal S2 is in burner hearth (3) and flows to
Lower flowing, in flow process, gas heat carrier S1 and fine coal S2 direct contact heat transfers, pulverized coal particle and gas can be effectively improved
Heat transfer efficiency between body heat carrier S 1, increase fine coal S2 heating rate, the heating rate of the process is more than 100K/s, fast
In the range of speed heat solution and flashing speed oven, it can make fine coal that fast pyrogenation reaction occur.Because gas heat carrier S1 is with reducibility gas
Based on, under high-temperature reductibility environment heat scission reaction, thermal decomposition product will further occur for the product of fine coal S2 fast pyrogenations
The secondary conversion of (macromolecule hydrocarbon such as tar), thermal decomposition product small molecular hydro carbons (CH can be effectively increased4、C2H4Deng) yield.
Final gas solid product S4 discharges from the outlet 5 of the bottom of burner hearth 3 after fine coal S2 pyrolysis, is handled into follow-up workshop section.
Solid in gas solid product S4 is semicoke, and for semicoke granularity below 100 μm, gasification reactivity is good, can add in gasification furnace and gasify
After obtain high-temperature synthesis gas, be instead sent into as gas heat carrier import 7 in air flow bed pyrolysis oven use (see effect example 1).
Gas in gas solid product S4 is the pyrolysis gas rich in methane, high-temperature gas can be obtained by oxidation furnace partial oxidation, equally
It can be instead sent into as gas heat carrier by gas heat carrier import 7 in air flow bed pyrolysis oven, realize circulation (see effect example
2)。
The pyrolysis of Shenmu County's bituminous coal of effect example 1 (thermal source is char Gasification product)
Fine coal raw material：Shenmu County's bituminous coal, Industrial Analysis and elementary analysis are as shown in table 1.
The Industrial Analysis and elementary analysis of Shenmu County's bituminous coal of table 1
Pyrolysis system：Air flow bed pyrolysis oven (day handles 2200 tons of coal butts), the existing entrained flow gasification of embodiment 1
Stove.
The related parameter of air flow bed pyrolysis oven：Fine coal is conveyed by carrier gas (nitrogen), and fine coal inlet amount is 90926kg/h,
80 DEG C of temperature, pressure 4.3MPa；Carrier gas (nitrogen) air inflow 9864.4kg/h, 80 DEG C of temperature, pressure 4.3MPa；It is pyrolyzed outlet of still
700 DEG C of temperature, pyrolysis furnace pressure 4.3MPa；Gas heat carrier (thermal source)：Fine coal is after pyrolysis from the gas-solid phase of the discharge of outlet 5
The high-temperature synthesis gas that semicoke in product in S4 gasifies through gasification furnace.
The related parameter of gasification furnace：Vapor air inflow 20080kg/h, 350 DEG C of temperature, pressure 5.0MPa；Oxygen enters
Doses 60170kg/h, 25 DEG C of temperature, pressure 4.3MPa；Gasification of carbonaceous raw material is fine coal after pyrolysis from the gas-solid of the discharge of outlet 5
Whole semicokes in phase product in S4, temperature are 350 DEG C；The heater outlet temperature that gasifies is 1300 DEG C, gasification furnace furnace pressure
4.3MPa。
Table 2 give gasification furnace go out furnace gases composition and air flow bed pyrolysis oven go out furnace gases composition.Fine coal is fast through pyrolysis oven
All semicokes caused by speed heat solution, gasify through gasification furnace and produce high-temperature synthesis gas, wherein about 16.32% high-temperature synthesis gas enters
In air flow bed pyrolysis oven, it is possible to meet the heat required for fine coal fast pyrogenation.The yield of methane is close to 10% in pyrolysis gas,
H2/ CO is close to 1.
Table 2 goes out furnace gases composition
The pyrolysis of Shenmu County's bituminous coal of effect example 2 (thermal source is circulation pyrolysis gas)
Fine coal raw material：With effect example 1
Pyrolysis system device：Pyrolysis oven (day handles 2200 tons of coal butts), the existing oxidation furnace of embodiment 1
The related parameter of air flow bed pyrolysis oven：Gas heat carrier is pyrolysis gas portion caused by pyrolysis of coal in air flow bed pyrolysis oven
The high-temperature gas divided after oxidation, i.e., pyrolysis gas caused by air flow bed pyrolysis oven, be partly passed through in oxidation furnace, oxygen supply makes it work off one's feeling vent one's spleen
Temperature reaches 1000 DEG C, and the high-temperature gas is then returned in air flow bed pyrolysis oven by gas heat carrier entrance 7, as powder
The thermal source of pyrolysis of coal.Remaining parameter is the same as effect example 1.
The related parameter of oxidation furnace：The inlet amount 2288.754kg/h of oxygen, 25 DEG C of temperature, pressure 4.3MPa；Oxidation is former
Expect that for the partial thermal decomposition gas of air flow bed pyrolysis oven output, temperature be 350 DEG C；It is 1000 DEG C to aoxidize heater outlet temperature, oxidation furnace stove
Interior pressure 4.3MPa.
Table 3, which gives, to be gone out furnace gases to circulate air flow bed pyrolysis oven of the pyrolysis gas as thermal source and forms.Fine coal fast pyrogenation produces
Raw pyrolysis gas, wherein only needing about 1.82% pyrolysis gas to enter heating by ignition in oxidation furnace produces high-temperature gas, it is possible to full
Heat required for foot-powder coal fast pyrogenation.The yield of methane is close to 13%, H in pyrolysis gas2/ CO is close to 2.5.
The gas of table 3 forms
The preferred embodiment created to the utility model above is illustrated, but the utility model is created not
It is limited to embodiment, those skilled in the art are a variety of etc. without prejudice to can also make under the utility model precondition for innovation
Same modification or replacement, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (7)
1. a kind of fine coal prepares the air flow bed pyrolysis oven vented one's spleen rich in methane thermal, it is characterised in that it includes the burner hearth (3) erect
With the entrance cavity (1) located at the burner hearth (3) above, burner hearth (3) interlude is straight barrel type, and burner hearth (3) bottom is set
There is outlet (5), separated at the top of the burner hearth (3) between the entrance cavity (1) by dividing plate (2), on the dividing plate (2) uniformly
Dispersion hole is distributed with, is provided with burner flange (6) at the top of the entrance cavity (1), entrance cavity (1) side is provided with gas heat carrier
Import (7), the internal process burner (4) for being provided with tubular of the entrance cavity (1), process burner (4) upper end passes through the burning
Mouth flange (6), lower end pass through the dividing plate (2).
2. air flow bed pyrolysis oven according to claim 1, it is characterised in that the burner hearth (3), the process burner (4)
With the entrance cavity (1) coaxial line.
3. air flow bed pyrolysis oven according to claim 1, it is characterised in that the burner hearth (3) and the entrance cavity (1)
Side wall is provided with refractory liner, and the refractory liner is lining of fire brick or water-cooling wall.
4. air flow bed pyrolysis oven according to claim 1, it is characterised in that the process burner (4) has outside to be used to lead to
The cooling layer of burner cooling water, the cooling layer outside have aluminosilicate heat-preservation cotton.
5. air flow bed pyrolysis oven according to claim 1, it is characterised in that burner hearth (3) the direct tube section internal diameter (D1) with
The ratio of burner hearth (3) the straight tube segment length (H1) is D1:H1=0.05~0.2.
6. air flow bed pyrolysis oven according to claim 1, it is characterised in that burner hearth (3) bottom is tapered, tapered side
The inclination angle (α) of wall is 30~60 °；The ratio of internal diameter (D2) and the burner hearth (3) direct tube section internal diameter (D1) of the outlet (5) is
D2:D1=0.1~0.5.
7. a kind of pulverized coal pyrolysis prepares the system vented one's spleen rich in methane thermal, it is characterised in that it includes such as claim 1~6 times
Air flow bed pyrolysis oven described in one, it also includes gas heat carrier feedway, and the gas heat carrier feedway is：
Gasification furnace, provided with being pyrolyzed, solid inlet is gentle to dissolve mouth, outlet (5) discharge of burner hearth (3) bottom to the gasification furnace
Gas solid product in pyrolysis solid the gasification furnace can be added by the pyrolysis solid inlet, the gasification outlet pass through
Pipeline is connected with the gas heat carrier import (7)；
Or oxidation furnace, the oxidation furnace is provided with pyrolysis gas entrance and combustion gas exports, the outlet (5) of burner hearth (3) bottom
Pyrolysis gas in the gas solid product of discharge can partly pass through the pyrolysis solid inlet and add the oxidation furnace, the combustion gas
Outlet is connected by pipeline and the gas heat carrier import (7).
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| CN201720494622.3U CN206902071U (en) | 2017-05-05 | 2017-05-05 | It is a kind of to prepare the air flow bed pyrolysis oven vented one's spleen rich in methane thermal and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107083249A (en) * | 2017-05-05 | 2017-08-22 | 华东理工大学 | A kind of fine coal prepares air flow bed pyrolysis oven, the system and method vented one's spleen rich in methane thermal |
| CN109054901A (en) * | 2018-08-01 | 2018-12-21 | 万华化学集团股份有限公司 | A kind of down-flow fluidized bed using ECT-fluidized bed tandem gasification process and device |
-
2017
- 2017-05-05 CN CN201720494622.3U patent/CN206902071U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107083249A (en) * | 2017-05-05 | 2017-08-22 | 华东理工大学 | A kind of fine coal prepares air flow bed pyrolysis oven, the system and method vented one's spleen rich in methane thermal |
| CN109054901A (en) * | 2018-08-01 | 2018-12-21 | 万华化学集团股份有限公司 | A kind of down-flow fluidized bed using ECT-fluidized bed tandem gasification process and device |
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