CN109735357A - A kind of semi-coke furnace raw coke oven gas method for modifying and device - Google Patents
A kind of semi-coke furnace raw coke oven gas method for modifying and device Download PDFInfo
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- CN109735357A CN109735357A CN201910089821.XA CN201910089821A CN109735357A CN 109735357 A CN109735357 A CN 109735357A CN 201910089821 A CN201910089821 A CN 201910089821A CN 109735357 A CN109735357 A CN 109735357A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The invention discloses a kind of semi-coke furnace raw coke oven gas method for modifying and devices.Method provided by the present invention includes: to cool down pyrogenation and carbonization product after pyrogenation and carbonization raw coal in furnace, waste heat when recycling is cooling in the process, generate steam, and after steam is heated to 600 DEG C or more, it is sent into furnace and pyrolysis and partial gasification is carried out to raw coal, increase gas yield, while reducing semi-coke quantum of output and reducing the nitrogen hydrogen ratio in coal gas.The inventive system comprises: it is located at the regenerative chamber of semi-coke furnace exterior two sides and the upper quirk being mounted in semi-coke furnace；Heat storage and burner are equipped in the regenerative chamber, the regenerative chamber is equipped with steam inlet, air intlet, exhanst gas outlet and upper quirk connector, the steam inlet is connected to semi-coke cooling residual heat recyclable device, is communicated in the upper quirk and semi-coke furnace and is connected to the excessive internal heat pipeline joint.The present invention makes full use of afterheat steam, hence it is evident that improves gas quality, provides condition for the high-quality utilization of semi-coke producer gas.
Description
Technical field
The present invention relates to coal pyrolysis retorting techniques, and in particular to a kind of semi-coke furnace raw coke oven gas method for modifying and device.
Background technique
Traditional semi-coke furnace, as gas heat carrier, obtains 600- by combustion with meagre oxygen using air and gas mixture body
900 DEG C of gas heat carriers carry out pyrogenation and carbonization to lump coal, obtain three kinds of semi-coke, coal tar and raw coke oven gas products.According to coal gas with
The gas heat carrier that can get different temperatures after air difference thinner ratio combustion with meagre oxygen, industrially adjusts semi-coke by thinner ratio
Furnace pyrolysis temperature, low temperature coal pyrolysis in realization.
In existing production technology, semi-coke furnace after middle low temperature pyrolysis of coal, is produced due to using air as combustion adjuvant
Nitrogen content is high in raw coke oven gas, and nitrogen volume content is 30-50% in usual raw coke oven gas, has seriously affected the exploitation value of raw coke oven gas
Value.
In order to reduce nitrogen content in raw coke oven gas, a kind of simple method is exactly using pure oxygen or oxygen rich gas as helping
Agent is fired to use, but in practice this method the drawbacks of be easily to set off an explosion, oxygen processed improves the operation cost of semi-coke furnace, economical
It is upper uneconomical.
In addition to this, synthesis ammonia can be prepared with raw coke oven gas, can be tolerated containing a certain amount of nitrogen in raw coke oven gas, but be passed through
After crossing transformation, nitrogen hydrogen ratio is that 3:1 or so is convenient for Ammonia Production, and nitrogen content is than synthesis ammonia in practical raw coke oven gas in raw coke oven gas
Requirement be higher by one times or so, and subsequent drop nitrogen technique increases ammonia cost.
It is influenced in reality by the market factor, often supply exceed demand for semi-coke product, and supply falls short of demand for raw coke oven gas and coal tar, needs
To increase the gas production of semi-coke furnace under same working condition, reduce semi-coke quantum of output, technically have and steam is passed directly into orchid
The measure of charcoal furnace, but highly endothermic water gas reaction occurs for steam and semi-coke, rapidly, semi-coke furnace output declines the cooling of semi-coke furnace,
And increases the content that air capacity maintains semi-coke furnace output to improve nitrogen in raw coke oven gas and be therefore directly injected into the waste coal of steam
It is unobvious that nitrogen technical effect drops in gas.
Summary of the invention
It is in view of the shortcomings of the prior art or insufficient, a kind of semi-coke furnace raw coke oven gas method for modifying.
Method provided by the present invention includes: to cool down pyrogenation and carbonization product after pyrogenation and carbonization raw coal in furnace, is returned in the process
Waste heat when receiving cooling generates steam, and after steam is heated to 600 DEG C or more, is sent into furnace and be pyrolyzed to raw coal and portion
Divide gasification, increase gas yield, while reducing semi-coke quantum of output and reducing the nitrogen hydrogen ratio in coal gas.
In some embodiments, remaining thermogenetic steam pressure is 0.1-0.6Mpa, and steam is heated to 600-1000 DEG C
It is sent into furnace afterwards.
In some embodiments, it is 50-200 kgs/tonne of semi-coke that steam, which is passed through the amount in furnace,.
The present invention also provides a kind of semi-coke preparation methods.
Provided semi-coke preparation method includes: to cool down pyrogenation and carbonization product after pyrogenation and carbonization raw coal in furnace, in the process
Waste heat when recycling is cooling generates steam, and after steam is heated to 600 DEG C or more, be sent into furnace to raw coal carry out pyrolysis with
Partial gasification.
The present invention provides a kind of semi-coke furnace raw coke oven gas modifying apparatus simultaneously.
Semi-coke furnace raw coke oven gas modifying apparatus provided by the invention includes: the regenerative chamber and installation for being located at semi-coke furnace exterior two sides
Upper quirk in semi-coke furnace；Heat storage and burner are equipped in the regenerative chamber, the regenerative chamber is equipped with steam inlet, sky
Gas import, exhanst gas outlet and upper quirk connector, the steam inlet are connected to semi-coke cooling residual heat recyclable device, the excessive internal heat
It communicates in road and semi-coke furnace and is connected to the excessive internal heat pipeline joint.
Preferably, upper quirk of the invention is refractory material channel, offers acute conjunctivitis hole, the upper quirk on the conduit wall
It builds above semi-coke furnace internal-quirk.
Further, solenoid valve is provided at steam inlet of the invention, exhanst gas outlet and air intlet.
The present invention also provides a kind of semi-coke furnaces.Semi-coke furnace raw coke oven gas modification dress of the invention is installed on the semi-coke furnace
It sets.
Further, semi-coke furnace of the invention includes burner hearth, be located at the coal bunker above semi-coke furnace, the quirk being located in burner hearth,
The semi-coke cooling section being located at below burner hearth, and it is located at the discharging device below semi-coke cooling section.
The configuration of the present invention is simple, investment is small, makes full use of itself afterheat steam of semi-coke furnace, can significantly improve coal gas matter
Amount increases semi-coke furnace gas production, reduces semi-coke yield, improves the nitrogen hydrogen ratio in raw coke oven gas, is that semi-coke producer gas is further high-quality
Using providing good condition.
Detailed description of the invention
Fig. 1 is semi-coke producer gas modifying apparatus reference view of the present invention.
In figure: 1- coal bunker, 2- collection ballute, 3- burner hearth, 4- regenerative chamber air burner (burner), 5- air blower, 6- store
Hot body, 7- chimney, 8- flue gas blower, 9- steamdrum, 10- afterheat steam pipe, 11- ram, 12- quenching storehouse, the electro-hydraulic lock of 13-
Door, 14- discharge of the coke belt, 15- quirk, the upper quirk of 16-, 17- semi-coke furnace burner, 18- solenoid valve, 19- discharged producer gas bridge tube.
Specific embodiment
Unless otherwise indicated, scientific and technical terminology of the invention is that the conventional of this field understands.
It is specific embodiments of the present invention below, to be further explained explanation to the present invention.
In traditional semi-coke furnace, semi-coke needs to continue to be cooled after pyrolysis, cooling generally to carry out in semi-coke furnace cooling end, tool
Body, which is adopted, to be water-cooled, and water is heated steam later after cooling, and becoming waste heat can recycle.Cooling is specifically included with device
Afterheat steam pipe 10 and afterheat steam packet 9, wherein the effect of afterheat steam packet 9 is steam-water separation.
Upper quirk of the invention is basic with lower quirk (former quirk is for providing heat) original in semi-coke furnace in structure
Identical, when function is mainly steam heat cycles, the steam for distributing heated enters in furnace；It is fired simultaneously in regenerative chamber
When burning heat storage body circulation, furnace interior divides coal gas to enter regenerative chamber through upper quirk.
Raw coke oven gas of the present invention refers to the coal gas that pyrolysis of coal generates in furnace in semi-coke production process.
Semi-coke furnace of the invention refers to the complete equipment of preparation semi-coke.Such as semi-coke furnace shown in FIG. 1, primary structure packet
Burner hearth 3 is included, the coal bunker 1 above semi-coke furnace, the collection ballute 2 being located in semi-coke burner hearth and quirk 15 are located at, is located at 3 lower section of burner hearth
Semi-coke cooling section, and it is located at the discharging device below semi-coke cooling section.Further discharging device includes ram 11, quenching storehouse
12, electro-hydraulic gate 13 and the belt 14 that discharges of the coke, the quirk 15 is interior to be equipped with semi-coke furnace burner 17, and semi-coke furnace burner 17 may be provided in quirk
Both ends, the semi-coke furnace roof are equipped with discharged producer gas bridge tube 19.
The semi-coke production technology of the equipment is fired as gas heat carrier by oxygen deprivation using air and gas mixture body
It burns and obtains 600-900 DEG C of gas heat carrier, pyrogenation and carbonization is carried out to lump coal, obtains three kinds of semi-coke, coal tar and raw coke oven gas products.
According to the gas heat carrier that can get different temperatures after coal gas and air difference thinner ratio combustion with meagre oxygen, industrially pass through thinner ratio
To adjust semi-coke furnace pyrolysis temperature, low temperature coal pyrolysis in realization.
Embodiment 1:
A kind of specific embodiment of the invention is outer plus following device and phase on semi-coke process units and Process ba- sis
Answer technological measure:
Waste-heat recovery device is set in semi-coke furnace cooling section, heat recovery steam pipe 10 specifically can be used in waste-heat recovery device
With steamdrum 9.Install in semi-coke furnace peripheral hardware regenerative chamber and in burner hearth 3 quirk 16.It, can be in semi-coke furnace to improve working efficiency
Outer two sides are respectively installed by regenerative chamber.
Heat storage 6 and burner are wherein equipped in regenerative chamber, regenerative chamber is equipped with steam inlet, air intlet, flue gas and goes out
Mouthful and upper quirk connector, steam inlet is connected to semi-coke cooling residual heat recyclable device, communicated in upper quirk and semi-coke furnace and with
The excessive internal heat pipeline joint connection.
A kind of specific embodiment, steam inlet is connected to by jet chimney, steamdrum with cooling residual heat recyclable device.
A kind of specific embodiment, upper quirk 16 are built above quirk 15, and upper quirk 16 is a refractory material channel,
It offers on its wall and is communicated in acute conjunctivitis hole and burner hearth.
In some specific embodiments, the indoor burner of accumulation of heat use air burner 4, air burner be equipped with air into
Mouthful, which is equipped with blower 5.
There are also in some specific embodiments, smoke outlet is equipped with chimney 7 and flue gas blower 8.
Be provided with solenoid valve 18 to realize automation control, at steam inlet, exhanst gas outlet and air intlet, solenoid valve with
Controller connection.When installation is there are two regenerative chamber, reversing solenoid valve can be used, with to two regenerative chamber combustion heating heat storages and
Heat storage heats steam and carries out commutation control.
In semi-coke preparation process, remaining thermogenetic steam is sent into the regenerative chamber being arranged in outside semi-coke furnace by steamdrum 9, steams
Vapour is heated in regenerative chamber reach certain temperature after, be sent into semi-coke burner hearth 3 in, into furnace in vapor action one be hot load
Body is pyrolyzed for physical heating coal, another effect is gasifying agent, and generation carbon monoxide is reacted with coal and hydrogen is useful
Gas, since vapor (steam) temperature is not high enough, so gasification reaction is incomplete, vapor portion gasification, therefore, steam is mostly as warm
Carrier enhancing pyrolysis, a part are consumed as gasification reaction, increase gas production.
Using the coal gas generated in semi-coke furnace, in regenerative chamber heat storage body circulation, due to draft, pass through upper quirk two
The bocca of side enters upper quirk out of furnace, enters back into regenerative chamber, burns with regenerative chamber air burner 4 and generates heat, for adding
Thermal regenerator body 6；It after heat storage 6 is heated, is heated for steam, the flue gas that regenerative chamber gas-fired heat storage body generates, quilt
After heat storage cooling, regenerative chamber is discharged by flue gas blower and chimney, air needed for gas-fired is sent by air blower 5 to be stored
Hot cell.
There are two when regenerative chamber, after the decline of 6 temperature of heat storage, steam heating can be stopped, using coal by switching operation
Gas combustion heating heat storage, carries out next circulation.Specifically, the heat storage for being located at two sides carries out intermittent heating, it is passed through steaming
After vapour heats a period of time, regenerator temperature decline, jet chimney solenoid valve is closed, and into next circulation, coal gas is out of furnace
Extraction, air pipeline solenoid valve are opened, burning, heat storage body, and flue solenoid valve is opened, and smoke evacuation, heat storage reaches temperature
After degree, air and flue solenoid valve are closed, and jet chimney solenoid valve is opened, and steam, which is heated, to be sent into furnace, and coal gas is steamed
Vapour pressure enters to complete a circulation in furnace.
In some preferred techniques, remaining thermogenetic steam pressure is 0.1-0.6Mpa, after being heated by regenerative chamber, is stored out
Hot cell vapor (steam) temperature is 700-1000 DEG C, and the steam being heated is sent into semi-coke furnace by quirk on semi-coke furnace.
Under some operating conditions, in addition to thermogenetic steam more than semi-coke furnace itself, be also possible to exogenous steam, using regenerative chamber plus
It is sent into semi-coke furnace after heat by quirk on semi-coke furnace.
There are also in some selection process, heat storage heating uses the heating gas in semi-coke furnace for fuel, heat storage after burning
Upper temp is 800-1100 DEG C, and exhaust gas temperature is lower than 400 DEG C, and burning time (commutating period) is 2-20min.
In concrete technology, steam intake (i.e. from cooling end waste heat boiler generate steam, by regenerative chamber heat into
Enter the quantity of steam in furnace) it can be 50-200 kgs/tonne of semi-coke.
In view of environmental protection, when regenerative chamber flue gas environmental emission is not up to standard, desulphurization denitration equipment can be increased, pass through gas cleaning
Qualified discharge afterwards.
In addition, regenerative chamber discharge flue-gas temperature it is excessively high when, heat exchange equipment can be increased, by with regenerative chamber gas-fired institute
Air is needed to exchange heat, Mist heat recovering improves gas-fired temperature.
Nitrogen content, H-N ratio, coal gas are effectively formed detection and are examined using this gas analyzer difficult to understand in following embodiment
It surveys.The coal gas effectively forms or coal gas effective component refers to other than nitrogen, carbon dioxide, oxygen such as: hydrogen, an oxygen
Change carbon, methane, olefines, alkanes, aromatics organic gas.
Embodiment 2:
5 tons of semi-coke furnace waste heat recycling of unit-hour output are produced 0.5 ton of steam per hour, and all feeding regenerative chamber is heated to 700 DEG C
Fed to boiler, regenerative chamber commutating period are 5 minutes, and nitrogen content is reduced to 30% by original 45% in raw coke oven gas of coming out of the stove；Nitrogen hydrogen
1:1.7 is reduced to than 1:1；Coal gas effectively forms increase by 15%.
Embodiment 3:
After 5 tons of unit-hour output, 1 ton of semi-coke furnace waste heat recycling production per hour steam whole feeding regenerative chamber is heated to 900 DEG C
Enter furnace, regenerative chamber commutating period is 10 minutes, and nitrogen content is reduced to 20% by original 45% in raw coke oven gas of coming out of the stove；Nitrogen hydrogen ratio
1:1 is reduced to 1:3；Coal gas effective component increases by 30%.
Embodiment 4:
After 5 tons of unit-hour output, 1 ton of semi-coke furnace waste heat recycling production per hour steam whole feeding regenerative chamber is heated to 950 DEG C
Enter furnace, regenerative chamber commutating period is 15 minutes, and nitrogen content is reduced to 18% by original 45% in raw coke oven gas of coming out of the stove.Nitrogen hydrogen ratio
1:1 is reduced to 1:3.3；Coal gas effective component increases by 30%.
Claims (9)
1. a kind of semi-coke furnace raw coke oven gas method for modifying, which is characterized in that method includes: cooling hot after pyrogenation and carbonization raw coal in furnace
Retorted product is solved, waste heat when recycling is cooling in the process generates steam, and after steam is heated to 600 DEG C or more, in feeding furnace
Pyrolysis and partial gasification are carried out to raw coal, increase gas yield, while reducing semi-coke quantum of output and reducing the nitrogen hydrogen ratio in coal gas.
2. semi-coke furnace raw coke oven gas method for modifying as described in claim 1, which is characterized in that the remaining thermogenetic steam pressure
For 0.1-0.6Mpa, steam is sent into furnace after being heated to 600-1000 DEG C.
3. semi-coke furnace raw coke oven gas method for modifying as described in claim 1, which is characterized in that the steam is passed through the amount in furnace and is
50-200 kgs/tonne of semi-coke.
4. a kind of semi-coke preparation method, which is characterized in that method includes: that cooling pyrogenation and carbonization produces after pyrogenation and carbonization raw coal in furnace
Product, waste heat when recycling is cooling in the process, generate steam, and after steam is heated to 600 DEG C or more, be sent into furnace it is interior to raw coal into
Row pyrolysis and partial gasification.
5. a kind of semi-coke furnace raw coke oven gas modifying apparatus, which is characterized in that described device includes: the storage for being located at semi-coke furnace exterior two sides
Hot cell and the upper quirk being mounted in semi-coke furnace；Heat storage and burner are equipped in the regenerative chamber, the regenerative chamber is equipped with
Steam inlet, air intlet, exhanst gas outlet and upper quirk connector, the steam inlet and semi-coke cooling residual heat recyclable device connect
It is logical, it communicates in the upper quirk and semi-coke furnace and is connected to the excessive internal heat pipeline joint.
6. semi-coke furnace raw coke oven gas modifying apparatus as claimed in claim 5, which is characterized in that the upper quirk is logical for refractory material
Road, acute conjunctivitis hole is offered on the conduit wall, and the upper quirk is built above semi-coke furnace internal-quirk.
7. semi-coke furnace raw coke oven gas modifying apparatus as claimed in claim 5, which is characterized in that the steam inlet, exhanst gas outlet
With solenoid valve is provided at air intlet.
8. a kind of semi-coke furnace, which is characterized in that be equipped with semi-coke furnace famine coal described in claim 5,6 or 7 on the semi-coke furnace
Gas modifying apparatus.
9. semi-coke furnace as claimed in claim 8, which is characterized in that the semi-coke furnace includes burner hearth, is located above semi-coke furnace
Coal bunker, the quirk being located in burner hearth, the semi-coke cooling section being located at below burner hearth, and it is located at the discharging dress below semi-coke cooling section
It sets.
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| CN201910089821.XA CN109735357A (en) | 2019-01-30 | 2019-01-30 | A kind of semi-coke furnace raw coke oven gas method for modifying and device |
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| CN201910089821.XA CN109735357A (en) | 2019-01-30 | 2019-01-30 | A kind of semi-coke furnace raw coke oven gas method for modifying and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112007743A (en) * | 2020-08-19 | 2020-12-01 | 付光临 | Blue charcoal preparation system of modification |
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| CN103374376A (en) * | 2012-04-20 | 2013-10-30 | 辽宁圜球工程设计有限公司 | Method for producing semi-coke by external heated type vertical carbonization furnace |
| CN204848756U (en) * | 2015-08-24 | 2015-12-09 | 长安大学 | Structure is transformed in blue charcoal producer gas circulation of interior hot type |
| CN207811669U (en) * | 2017-12-22 | 2018-09-04 | 北京神雾电力科技有限公司 | A kind of efficient waste heat recycling pyrolysis reactor |
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- 2019-01-30 CN CN201910089821.XA patent/CN109735357A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004292550A (en) * | 2003-03-26 | 2004-10-21 | Hokuriku Electric Power Co Inc:The | Apparatus for superheated steam type thermal decomposition |
| CN103374376A (en) * | 2012-04-20 | 2013-10-30 | 辽宁圜球工程设计有限公司 | Method for producing semi-coke by external heated type vertical carbonization furnace |
| CN102757803A (en) * | 2012-07-03 | 2012-10-31 | 北京神雾环境能源科技集团股份有限公司 | Steam low-temperature carbonization system and method of waste tire fluidized bed |
| CN204848756U (en) * | 2015-08-24 | 2015-12-09 | 长安大学 | Structure is transformed in blue charcoal producer gas circulation of interior hot type |
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| CN112007743A (en) * | 2020-08-19 | 2020-12-01 | 付光临 | Blue charcoal preparation system of modification |
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Application publication date: 20190510 |