CN109810717A - A kind of method reducing dry coke quenching coke burning and the device for preparing dry coke quenching - Google Patents
A kind of method reducing dry coke quenching coke burning and the device for preparing dry coke quenching Download PDFInfo
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- CN109810717A CN109810717A CN201910220965.4A CN201910220965A CN109810717A CN 109810717 A CN109810717 A CN 109810717A CN 201910220965 A CN201910220965 A CN 201910220965A CN 109810717 A CN109810717 A CN 109810717A
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Abstract
The present invention provides a kind of methods for reducing dry coke quenching coke burning, comprising: the dirty nitrogen of oxygen content 5%~8% is imported entrance by air and is passed through coke dry quenching furnace gas-circulating system, is handled.The present invention also provides a kind of devices.The present invention replaces most of air to enter coke dry quenching furnace cycle flue using the dirty nitrogen of the oxygen content 5%~8% of air separation unit by-product, can reduce air import volume, increases nitrogen import volume, dilutes CO and H2Guarantee safety and stability production, reduces CO in coke dry quenching furnace recyclegas2Content, to reduce dry coke quenching charcoal burn out rate.
Description
Technical field
The invention belongs to coking technology field more particularly to a kind of method for reducing dry coke quenching coke burning and a kind of prepare
The device of dry coke quenching.
Background technique
For dry coke quenching using inertia recyclegas as heat carrier, the cooling process of coke is exactly inert gas and red heat coke button
Reverse flow occurs the heat exchange of gas phase and solid phase and makes red burnt cooling process.Ideal inert gas is N2, due to following
The presence of reaction, composition will change when recyclegas passes through red heat coke in coke dry quenching furnace.
(1) contain aerobic (21% or so) in air, can be reacted with coke in recyclegas system:
C+O2=CO2 (1)
C+O2=2CO (2)
And CO2In coke high-temperature region, meeting charcoal melts reaction again, is reduced into CO.
CO2+ C=2CO (3)
With increasing for cycle-index, the intracorporal CO component content of circulating air (i.e. flammable explosive ingredient) is higher and higher.
(2) moisture contained in air:
C+H2O=CO+H2 (4)
(3) furthermore coke remaining fugitive constituent is being precipitated always, newly generated H2、CH4Deng be also flammable explosive ingredient.
C+2H2=CH4 (5)
As it can be seen that the operation of the pairs of dry coke quenching auxiliary of group of control inert gas is particularly significant.In the circulatory system, occur anti-
(1) (2) (3) are answered, not only scaling loss coke, but also increases CO.To prevent CO, H2、CH4It is exceeded, then it needs importing air to be burnt up, leads
Cause the raising of coke burning rate.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of method for reducing dry coke quenching coke burning and preparing dry coke quenching
Device, method provided by the invention reduces the burning of coke in coke dry quenching furnace under the premise of guaranteeing circulatory system stable operation
Damage.
The present invention provides a kind of methods for reducing dry coke quenching coke burning, comprising:
The dirty nitrogen of oxygen content 5%~8% is imported into entrance by air and is passed through coke dry quenching furnace gas-circulating system, is located
Reason.
The present invention replaces most of air to enter coke dry quenching furnace gas-circulating system using the dirty nitrogen of oxygen content 5%~8%,
Air import volume can be reduced, nitrogen import volume is increased, dilutes CO and H2Guarantee safety and stability production, reduces coke dry quenching furnace circulating air
CO in body2Content, to reduce dry coke quenching charcoal burn out rate.
In one embodiment of the invention, the coke dry quenching furnace gas-circulating system includes recyclegas entrance, circulating air
Body exports and is arranged in the bypass line between recyclegas entrance and recyclegas outlet.Dry quenching device is to guarantee that its is micro- negative
The circulating air pressed is supplied by filling into fresh nitrogen from air importing entrance with air self-suction, and air imports entrance can position
It is exported, on middle bolt pipeline or bypass line in recyclegas entrance, the recyclegas of coke dry quenching furnace gas-circulating system, wherein in
Bolt pipeline is high-temperature region, preferably directs the air into entrance setting in the position, provides the effect of dirty Oxygen in Nitrogen consumption, that is, exists
Circulating air, which has gone out, just supplements dirty nitrogen after coke dry quenching furnace, the oxygen before being again introduced into coke dry quenching furnace in dirty nitrogen is largely disappeared
It consumes.
In one embodiment of the invention, air and the dirty nitrogen of oxygen content 5%~8% are passed through by middle bolt pipeline
Coke dry quenching furnace gas-circulating system, is handled.
In one embodiment of the invention, the dirty nitrogen is the dirty nitrogen of air separation unit by-product, derives from methanol system
The dirty nitrogen outlet of air separation unit fractionating column during standby.
Beneficial effects of the present invention are as follows:
Before transformation: 180,000 NM of circulating flow rate3/ h imports 8000~10000NM of air3/ h, pure nitrogen gas supplement about 10,000,000
NM3/h.Circulating air amount of diffusin undetermined, this amount are primarily used to tiny structure -50~-100Pa in control coke dry quenching furnace.
After transformation: 180,000 NM of circulating flow rate3/ h imports 3000~5000NM of air3/ h, importing dirt nitrogen 3000~
5000NM3/ h, circulating air amount of diffusin undetermined, this amount are primarily used to tiny structure -50~-100Pa in control coke dry quenching furnace.
Contrast table is as follows:
Gas composition is as shown in the table in the coke dry quenching furnace circulatory system:
| CO | H2 | CO2 | O2 | N2 | H2O | |
| Before transformation | 3~5% | 0~2% | 16~18% | 0~1% | Remaining | 5~7% |
| After transformation | 3~5% | 0~2% | 12-14% | 0~1% | Remaining | 5~7% |
The present invention also provides a kind of devices for preparing dry coke quenching, comprising:
Coke dry quenching furnace is provided with gas-circulating system in the coke dry quenching furnace, is provided with air in the gas-circulating system and leads
Entrance；
The dirty nitrogen that entrance is connected, which is imported, with the air imports entrance；
The dirty nitrogen storage device that entrance is connected is imported with the dirty nitrogen；
The disposable dust remover being connected with the gas vent of the coke dry quenching furnace；
The connected boiler of the gas vent of the disposable dust remover；
The secondary filter being connected with the boiler；
The circulating fan being connected with the secondary filter；
The heat exchange of heat pipe being connected with the circulating fan, the heat exchange of heat pipe are communicated with the coke dry quenching furnace.
In one embodiment of the invention, in the dirty nitrogen storage device, dirty nitrogen oxygen content is 5%~8%.
In one embodiment of the invention, the air imports the middle bolt pipeline that gas-circulating system is arranged in entrance
On.
The present invention replaces most of air to enter coke dry quenching furnace cycle flue using the dirty nitrogen of oxygen content 5%~8%, can
Air import volume is reduced, nitrogen import volume is increased, dilutes CO and H in recyclegas2Concentration guarantees safety and stability production, reduces
Dry coke quenching charcoal burn out rate, while solving the problems, such as the use of the low dirty nitrogen of the economic value of air separation unit by-product.Experimental result
Show to replace air after ring-shaped flue imports coke dry quenching furnace recyclegas the dirty nitrogen of oxygen content 5%~8%, keeps circulation
In the case that combustible component CO content is constant in gas, bypass import volume is by former 12000m per hour3It reduces to per hour
7000m3, air import volume has original 10000m per hour3It reduces to 4000m per hour3, H2Before content is by importing dirty nitrogen
0.7% be reduced to 0.49%, CO after the dirty nitrogen of importing2Content is reduced to the dirty nitrogen of importing by 17.69% before importing dirty nitrogen
12.09% after gas, makes single set dry quenching system, can be reduced 0.5 ton of coke burning per hour, two sets of dry quenching systems are burnt less daily
24 tons of coke of damage, per 8760 tons of young scaling loss coke.
Detailed description of the invention
Fig. 1 is the preparation facilities schematic diagram for the dry coke quenching coke that the prior art provides；
Fig. 2 is the structural schematic diagram of device provided in an embodiment of the present invention.
Specific embodiment
The method provided by the invention for reducing dry coke quenching coke burning is further described with reference to embodiments.
Referring to Fig. 1, Fig. 1 is the preparation facilities schematic diagram for the dry coke quenching coke that the prior art provides comprising: coke dry quenching furnace,
The top of the coke dry quenching furnace is provided with air intake；The disposable dust remover being connected with the gas vent of the coke dry quenching furnace；Described one
The connected boiler of the gas vent of secondary deduster；The secondary filter being connected with the boiler；It is connected with the secondary filter
Circulating fan；The heat exchange of heat pipe being connected with the circulating fan, the heat exchange of heat pipe are communicated with the coke dry quenching furnace.
In the preparation of existing dry coke quenching, air is imported in coke dry quenching furnace by ring-shaped flue, and this method is using in air
O2With the CO and H in recyclegas2Reaction, 2CO+O2=2CO2, 2H2+O2=2H2O reduces CO and H2In recyclegas system
Content is by the CO and H that burns2To achieve the purpose that safety in production.But CO caused by reacting2It is anti-melting to occur with coke
It answers, CO2+ C=2CO thus has coke and is burnt, and burn out rate is just high.Combustion reaction inevitably generates greatly
The heat of amount can improve the steam production of boiler for boiler, but we want be coke scaling loss reduction.
Therefore, the present invention is passed through dirty nitrogen into coke dry quenching furnace, and referring to fig. 2, Fig. 2 is device provided in an embodiment of the present invention
Structural schematic diagram, the device include: coke dry quenching furnace, and the top of the coke dry quenching furnace is provided with dirty nitrogen inlet；With the coke dry quenching furnace
The connected dirty nitrogen storage device (being not shown) of dirty nitrogen inlet；It is connected with the gas vent of the coke dry quenching furnace primary
Deduster；The connected boiler of the gas vent of the disposable dust remover；The secondary filter being connected with the boiler；With described two
The connected circulating fan of secondary deduster；The heat exchange of heat pipe being connected with the circulating fan, the heat exchange of heat pipe are done with described
Furnace is put out to communicate.
The present invention replaces most of air to imported into coke dry quenching furnace ring-shaped flue using dirty nitrogen, since dirty Oxygen in Nitrogen contains
Amount is 5~8%, more much lower than in air, greatly reduces and generates CO and CO with coke2A possibility that, it is to be reduced by dilution
CO and H2Content, achieve the purpose that safety in production.Combustion reaction amount is reduced, and then CO2Content is just low, and charcoal occurs and melts reaction
A possibility that reduce.So reducing the scaling loss of coke.
In one embodiment, in the dirty nitrogen storage device, dirty nitrogen oxygen content is 5%~8%.
In one embodiment, the dirty nitrogen inlet, which is connected to be arranged with air intake, enters coke dry quenching furnace in middle bolt position
Ring-shaped flue participates in gas circulation.
The present invention also provides a kind of methods for reducing dry coke quenching coke burning, comprising:
The dirty nitrogen of oxygen content 5%~8% is imported into entrance by air and is passed through coke dry quenching furnace gas-circulating system, is located
Reason.
The present invention replaces most of air to be passed through dry put out using the dirty nitrogen of the oxygen content 5%~8% of air separation unit by-product
The air of annular flue imports entrance, can reduce air imbibed quantity, bypass import volume, fuel gas in control loop gas
H in ingredient2、O2, CO and CO2Content imports O under the premise of guaranteeing entire circulatory system safe and stable operation less as far as possible2,
Rationally CO in control coke dry quenching furnace2Content, the scaling loss of coke in coke dry quenching furnace can be reduced.
In one embodiment, dirty nitrogen gas source dirty nitrogen of air separation unit fractionating column in methanol preparation process goes out
Mouthful.
Recyclegas range such as following table institute after replacing air using the dirty nitrogen of oxygen content 5%~8%, in coke dry quenching furnace
Show:
| CO | H2 | CO2 | O2 | N2 | H2O |
| 3~5% | 0~2% | 12~18% | 0~1% | Remaining | 5~7% |
The dirty nitrogen of oxygen content 5%~8% is replaced air after ring-shaped flue imports coke dry quenching furnace recyclegas by the present invention,
Make in recyclegas H in combustible gas component2、O2, CO and CO2Content is controllable, thus before guaranteeing circulatory system stable operation
It puts, reduces the scaling loss of coke in coke dry quenching furnace.The experimental results showed that the dirty nitrogen of oxygen content 5%~8% is passed through instead of air
After ring-shaped flue imports coke dry quenching furnace recyclegas, in the case that combustible component CO content is constant in holding recyclegas, bypass is led
Enter amount to be reduced by former 12000m per hour to 7000m per hour3, air import volume has original 10000m per hour3It reduces to every
Hour 4000m3, H2Content is reduced to 0.49%, CO after the dirty nitrogen of importing by 0.7% before importing dirty nitrogen2Content is dirty by importing
17.69% before nitrogen is reduced to 12.09% after the dirty nitrogen of importing, and single dry quenching system that covers is made to can be reduced coke burning per hour
0.5 ton, two sets of dry quenching systems lack 24 tons of scaling loss coke daily, per 8760 tons of young scaling loss coke.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (7)
1. a kind of method for reducing dry coke quenching coke burning characterized by comprising
The dirty nitrogen of oxygen content 5%~8% is imported into entrance by air and is passed through coke dry quenching furnace gas-circulating system, is handled.
2. the method according to claim 1, wherein the air, which imports entrance, is located at coke dry quenching furnace gas cyclic system
On the middle bolt pipeline of system.
3. the method according to claim 1, wherein the dirty nitrogen of air and oxygen content 5%~8% is passed through sky
Conductance entrance is passed through coke dry quenching furnace gas-circulating system, is handled.
4. the method according to claim 1, wherein the dirt nitrogen gas source is in the hollow packing of methanol preparation process
Set the dirty nitrogen outlet of fractionating column.
5. a kind of device for preparing dry coke quenching characterized by comprising
Coke dry quenching furnace is provided with gas-circulating system in the coke dry quenching furnace, be provided in the gas-circulating system air import into
Mouthful；
The dirty nitrogen that entrance is connected, which is imported, with the air imports entrance；
The dirty nitrogen storage device that entrance is connected is imported with the dirty nitrogen；
The disposable dust remover being connected with the gas vent of the coke dry quenching furnace；
The connected boiler of the gas vent of the disposable dust remover；
The secondary filter being connected with the boiler；
The circulating fan being connected with the secondary filter；
The heat exchange of heat pipe being connected with the circulating fan, the heat exchange of heat pipe are communicated with the coke dry quenching furnace.
6. device according to claim 5, which is characterized in that in the dirt nitrogen storage device, dirty nitrogen oxygen content is
5%~8%.
7. device according to claim 6, which is characterized in that the air imports entrance and gas-circulating system is arranged in
On middle bolt pipeline.
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Cited By (4)
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| CN110452717A (en) * | 2019-08-05 | 2019-11-15 | 中冶焦耐(大连)工程技术有限公司 | A kind of method and system for distributing comprehensive treatment coking tail gas rationally |
| CN111676028A (en) * | 2020-06-08 | 2020-09-18 | 首钢集团有限公司 | System and method for reducing coke burning loss rate in dry quenching furnace |
| CN114317012A (en) * | 2021-12-31 | 2022-04-12 | 华泰永创(北京)科技股份有限公司 | Dry coke quenching and coke moving system and method |
| CN114907866A (en) * | 2022-06-21 | 2022-08-16 | 包头钢铁（集团）有限责任公司 | Method for reducing dry quenching coke burning loss rate |
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| CN110452717A (en) * | 2019-08-05 | 2019-11-15 | 中冶焦耐(大连)工程技术有限公司 | A kind of method and system for distributing comprehensive treatment coking tail gas rationally |
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| CN111676028A (en) * | 2020-06-08 | 2020-09-18 | 首钢集团有限公司 | System and method for reducing coke burning loss rate in dry quenching furnace |
| CN114317012A (en) * | 2021-12-31 | 2022-04-12 | 华泰永创(北京)科技股份有限公司 | Dry coke quenching and coke moving system and method |
| CN114907866A (en) * | 2022-06-21 | 2022-08-16 | 包头钢铁（集团）有限责任公司 | Method for reducing dry quenching coke burning loss rate |
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