CN108036290A - A kind of coal oven dithio-gas heat recovery process free of discontinuities - Google Patents
A kind of coal oven dithio-gas heat recovery process free of discontinuities Download PDFInfo
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- CN108036290A CN108036290A CN201711405020.7A CN201711405020A CN108036290A CN 108036290 A CN108036290 A CN 108036290A CN 201711405020 A CN201711405020 A CN 201711405020A CN 108036290 A CN108036290 A CN 108036290A
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- 239000003245 coal Substances 0.000 title claims abstract description 28
- 238000011084 recovery Methods 0.000 title claims abstract description 16
- 239000007789 gas Substances 0.000 claims abstract description 57
- 239000000571 coke Substances 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000002918 waste heat Substances 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 16
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 10
- 238000006392 deoxygenation reaction Methods 0.000 claims abstract description 4
- 230000008676 import Effects 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000004939 coking Methods 0.000 claims description 7
- 238000010791 quenching Methods 0.000 claims description 7
- 230000000171 quenching effect Effects 0.000 claims description 7
- 238000005235 decoking Methods 0.000 claims description 5
- 239000012716 precipitator Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 4
- 239000003034 coal gas Substances 0.000 claims description 3
- 238000013021 overheating Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B27/00—Arrangements for withdrawal of the distillation gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
The present invention relates to a kind of coal oven dithio-gas heat recovery process free of discontinuities, the vapor heat exchanger A that coal oven dithio-gas enters in waste heat boiler after dedusting exchanges heat, monitor the raw coke oven gas import and export pressure difference of vapor heat exchanger A on-line, realize the automatic switchover with vapor heat exchanger B, vapor heat exchanger A is burnt after switching；Demineralized water enters drum after deoxygenation, heat exchange, and enters vapor heat exchanger and exchange heat with raw coke oven gas, and the high-pressure saturated steam of generation further send steam superheater, and the high pressure superheated steam of generation is sent to high-voltage power user；Either vapor heat exchanger being passed through as low-pressure superheated steam after reduced pressure treatment and being burnt used for low-pressure steam user again or after pressure and temperature reducing is handled；The present invention can high efficiente callback coal oven dithio-gas heat, produce the steam of multi-parameter and used for different user, realize that process system steam inside recycles, while ensure the operation free of discontinuities of waste heat reclaiming process system and do not influence coke oven safety in production.
Description
Technical field
The present invention relates to residual heat utilizing technology of coke oven crude gas field, more particularly to a kind of coal oven dithio-gas heat are free of discontinuities
Recovery process.
Background technology
Coking process flow is substantially the industrial flow using carbon stream as main body train of thought, therefore solves carbon stream
It is energy-saving to be of great significance for optimization coking process flow.Heat expenditure in coke production mainly by it is red it is burnt from
650~750 DEG C of medium temperature waste heats, coke oven flues that 950~1050 DEG C of high-temperature residual heats, the coal oven dithio-gas taken out of in coke oven are taken out of give up
180~250 DEG C of low temperature exhaust heats and four part of furnace body surface heat loss composition that gas is taken out of.Wherein, coal oven dithio-gas is taken out of
650~750 DEG C of medium temperature waste heats account for the 37% of coke oven heat expenditure, this partial heat of high efficiente callback recycles coal chemical enterprise secondary energy sources
It is particularly important that utilization, but coal oven dithio-gas component is extremely complex, easily condensation precipitation is attached in heat-exchanger rig and graphite occurs
Change effect.At present, waste heat of coke oven crude gas, but recuperation of heat are mainly recycled using Ascension Pipe Gasification cooling device, HYWHR technologies etc.
Efficiency is low, product category is single, it is easy generation coke oven coke oven uprising tube leak to coke furnace carbonization chamber phenomena such as, influence coke oven keep the safety in production.
The content of the invention
It is burnt using the high efficiente callback of waste heat heat boiler the present invention provides a kind of coal oven dithio-gas heat recovery process free of discontinuities
The heat of stove raw coke oven gas, the steam for producing multi-parameter is used for high-voltage power user and low-pressure steam user, and realizes technique system
System steam inside recycles, and reaches energy saving purpose；Meanwhile ensure the operation free of discontinuities of waste heat reclaiming process system and do not influence Jiao
Stove is kept the safety in production.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of coal oven dithio-gas heat recovery process free of discontinuities, includes the following steps：
1) after hot precipitator dedusting, enter through 650~750 DEG C derived from tedge, gas collecting tube of raw coke oven gas from coke oven
Waste heat boiler；
2) the vapor heat exchanger A that coal oven dithio-gas enters in waste heat boiler exchanges heat, raw coke oven gas inlet temperature for 640~
660 DEG C, 25~40m/s of mean flow rate, heat exchanger tube tube wall temperature are not less than 320 DEG C；Raw gas temperature after heat exchange drops to 350 DEG C
Hereinafter, into low-temperature zone residual neat recovering system；
3) the raw coke oven gas import and export pressure difference of vapor heat exchanger A is monitored on-line, when pressure difference reaches more than 1.5KPa, automatically
Vapor heat exchanger B is switched to, while cuts off the pipeline between vapor heat exchanger A and drum；Then, it is passed through more than 550 DEG C low
Hot steam and high temperature compressed air are pressed through, vapor heat exchanger A is burnt, when the product that burns of vapor heat exchanger A discharges is
Stop burning during clean water；
4) room temperature demineralized water temperature after deoxygenation is 104 DEG C, is introduced into cryogenic heat exchanger, is led with the high temperature that heating furnace produces
Deep fat exchanges heat for heat source, and temperature reaches more than 210 DEG C of boiler feedwater and enters drum after heat exchange, then from down-comer entrance
Vapor heat exchanger A；Demineralized water is heated to be after steam water interface by raw coke oven gas in vapor heat exchanger A returns to drum through tedge,
Steam-water separation is carried out in drum, produces 10~13MPa of pressure, the high-pressure saturated steam that 311~331 DEG C of temperature；
5) high-pressure saturated steam further send steam superheater, and the high pressure superheated steam of generation is sent to high-voltage power user；
Either vapor heat exchanger A is passed through as low-pressure superheated steam, vapor heat exchanger B is burnt again or passed through after reduced pressure treatment
Used after pressure and temperature reducing processing for low-pressure steam user；
6) boiler feedwater is continued to be heated by down-comer into vapor heat exchanger A again, carries out circulation in cycles；When being
When system monitors vapor heat exchanger A cokings, down-comer of the water through vapor heat exchanger B in drum starts into vapor heat exchanger B
Heat exchange and then generation steam.
Confirm start to burn flow after, by step 4) produce more than 550 DEG C high pressure superheated steams in all the way through subtracting
Pressure processing, is sent into vapor heat exchanger A after pressure is reduced to below 0.1MPa；Increasing steam is alternately and repeatedly carried out during being somebody's turn to do
Amount, the operation for reducing quantity of steam, prevent coke button peeling rate is too fast from resulting in blockage；Treat that temperature reaches 500 DEG C in vapor heat exchanger A
During the above, it is passed through high temperature compressed air and starts to burn.
In the heating furnace, conduction oil is heated using the coal gas quoted from outer net, by heat-conducting oil heating to 300 DEG C with
After upper, be passed into the deaerated feedwater in cryogenic heat exchanger with 100~110 DEG C and exchange heat, by deaerated feedwater be heated to 210 DEG C with
On, the low conduction oil after heat exchange returns to heating furnace circulating-heating.
The steam superheater using coke dry quenching furnace recyclegas as heat source, to drum produce high temperature and pressure saturated vapor into
Row Overheating Treatment, makes its temperature reach more than 550 DEG C.
The waste heat boiler is casing quenching waste heat boiler.
Steam-air decoking method is used in waste heat boiler, by the use of more than 550 DEG C of low-pressure superheated steams as burning heat
Source, removes the tar produced in vapor heat exchanger A, vapor heat exchanger B.
Compared with prior art, the beneficial effects of the invention are as follows：
1) coal oven dithio-gas is led into waste heat boiler and carries out coal oven dithio-gas heat recovery and utilization, ensure heat-exchange system
With coke oven independent operating；It is capable of the heat of high efficiente callback coal oven dithio-gas, produces the steam of many kinds of parameters and realize process system
Steam inside recycles, and reaches energy saving purpose；
2) recycling free of discontinuities of coal oven dithio-gas heat is realized, is not required to halt production coke cleaning, steam can be avoided to greatest extent
Heat exchange is because of the possibility of coking booster；And steam user can be continuously steam is provided；
3) it is abundant to make use of self-produced 550 DEG C of low-pressure superheated steams to improve steam circulation utilization rate, clearly as heat source is burnt
Burnt effect is good, speed is fast, avoids the damage of mechanical decoking exchange heat pipe, while has saved the energy；
4) heat-exchange system and coke oven independent operation, are independent of each other, and can be matched with a variety of production-scale coke ovens；
5) monitor coking situation in heat exchanger tube on-line, realize and automatically switch between vapor heat exchanger A, B；
6) coke dry quenching furnace recyclegas utilization rate is improved；
7) water cycle efficieny is high in system, reduces outer net water supply.
Brief description of the drawings
Fig. 1 is a kind of flow chart of coal oven dithio-gas heat recovery process free of discontinuities of the present invention.
In figure：1. 2. hot precipitator of coke oven, 3. sweet-water tank, 4. deaerated feedwater pump 5. oxygen-eliminating device, 6. boiler feed pump 7. is low
13. waste heat boiler of warm 8. tedge of heat exchanger 9. down-comer, 10. periodical blowdown expander, 11. sewage well, 12. ash cellar, 14. desuperheat subtracts
19. vapor heat exchanger B of pressure device 15. steam superheater, 16. heating furnace, 17. decompressor, 18. vapor heat exchanger A, 20. drums
Embodiment
The embodiment of the present invention is described further below in conjunction with the accompanying drawings：
As shown in Figure 1, a kind of coal oven dithio-gas heat recovery process free of discontinuities of the present invention, includes the following steps：
1) from coke oven 1 through 650~750 DEG C derived from tedge, gas collecting tube of raw coke oven gas, after 2 dedusting of hot precipitator, into
Enter waste heat boiler 13；
2) the vapor heat exchanger A 18 that coal oven dithio-gas enters in waste heat boiler 13 exchanges heat, and raw coke oven gas inlet temperature is
640~660 DEG C, 25~40m/s of mean flow rate, heat exchanger tube tube wall temperature are not less than 320 DEG C；Raw gas temperature after heat exchange drops to
Less than 350 DEG C, into low-temperature zone residual neat recovering system；
3) the raw coke oven gas import and export pressure difference of vapor heat exchanger A 18 is monitored on-line, when pressure difference reaches more than 1.5KPa, from
It is dynamic to switch to vapor heat exchanger B 19, while cut off the pipeline between vapor heat exchanger A 18 and drum 20；Then, 550 are passed through
Low-pressure superheated steam and high temperature compressed air more than DEG C, burn vapor heat exchanger A 18, as vapor heat exchanger A 18
Burning for discharge stops burning when product is clean water；
4) room temperature demineralized water temperature after deoxygenation is 104 DEG C, is introduced into cryogenic heat exchanger 7, the height produced with heating furnace 16
Warm conduction oil exchanges heat for heat source, and temperature reaches more than 210 DEG C of boiler feedwater and enters drum 20 after heat exchange, then from decline
Pipe 9 enters vapor heat exchanger A 18；Demineralized water is heated to be after steam water interface through upper by raw coke oven gas in vapor heat exchanger A 18
Riser 8 returns to drum 20, and steam-water separation is carried out in drum 20, produces 10~13MPa of pressure, the high pressure that 311~331 DEG C of temperature
Saturated vapor；
5) high-pressure saturated steam further send steam superheater 15, and the high pressure superheated steam of generation, which is sent to high-voltage power, to be used
Family；Or be passed through vapor heat exchanger A18 as low-pressure superheated steam after reduced pressure treatment, vapor heat exchanger B19 is burnt, then
Or used after pressure and temperature reducing is handled for low-pressure steam user；
6) boiler feedwater enters vapor heat exchanger A 18 by down-comer 9 again and continues to be heated, and carries out circulation in cycles；
When system monitoring is steamed to during vapor heat exchanger 18 cokings of A, down-comer 9 of the water through vapor heat exchanger B 19 in drum 20 enters
Vapour heat exchanger B 19 starts the steam that exchanges heat and then produce.
Confirm start to burn flow after, by step 4) produce more than 550 DEG C high pressure superheated steams in all the way through subtracting
Pressure processing, is sent into vapor heat exchanger A 18 after pressure is reduced to below 0.1MPa；Increasing steaming is alternately and repeatedly carried out during being somebody's turn to do
Vapour amount, the operation for reducing quantity of steam, prevent coke button peeling rate is too fast from resulting in blockage；Treat that temperature reaches in vapor heat exchanger A 18
At more than 500 DEG C, it is passed through high temperature compressed air and starts to burn.
In the heating furnace 16, conduction oil is heated using the coal gas quoted from outer net, by heat-conducting oil heating to 300 DEG C
After above, it is passed into the deaerated feedwater in cryogenic heat exchanger 7 with 100~110 DEG C and exchanges heat, deaerated feedwater is heated to 210
More than DEG C, the low conduction oil after heat exchange returns to 16 circulating-heating of heating furnace.
The steam superheater 15 steams the high temperature and pressure saturation that drum 20 produces using coke dry quenching furnace recyclegas as heat source
Vapour carries out Overheating Treatment, its temperature is reached more than 550 DEG C.
The waste heat boiler 13 is casing quenching waste heat boiler.
Steam-air decoking method is used in the waste heat boiler 13, by the use of more than 550 DEG C of low-pressure superheated steams as burning
Heat source, removes the tar produced in vapor heat exchanger A 18, vapor heat exchanger B 19.
Following embodiments are implemented under premised on technical solution of the present invention, give detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments
It is conventional method not mentionlet alone bright.
【Embodiment】
In the present embodiment, a kind of coal oven dithio-gas high temperature section heat high efficiente callback technique, comprises the following steps that：
1) 650~750 DEG C of raw coke oven gas from coke oven enter gas collecting tube by the tedge of coke oven 1, enter after flue dust aggregation
Hot precipitator 2 carries out dedusting, and the raw coke oven gas after dedusting exchanges heat into waste heat boiler 13, and the lime-ash after dedusting enters ash cellar
Outer row after 12；
2) the vapor heat exchanger A 18 that raw coke oven gas enters in waste heat boiler 13 exchanges heat, and keeps raw coke oven gas inlet temperature about
For 650 DEG C, 25~40m/s of mean flow rate, 330 DEG C of heat exchanger tube tube wall temperature；After heat exchange low temperature raw coke oven gas enter other workshop sections into
Row low-temperature zone heat recovery；
3) at the same time, the temperature after deaerated feedwater pump 4 enters oxygen-eliminating device 5 of the room temperature demineralized water in sweet-water tank 3 reaches 104
DEG C, 104 DEG C of deaerated feedwater enters cryogenic heat exchanger 7 through boiler feed pump 6 all the way, the 300 DEG C of heat conduction produced with heating furnace 16
Temperature reaches 210 DEG C after oil heat exchange；Another way is sent to reducing-and-cooling plant 14 and is used as desuperheating water；
4) after 210 DEG C of boiler feedwater enters drum 20, enter vapor heat exchanger A 18 through down-comer 9, handed over by heat
Change, become through tedge 8 to enter in drum 20 after steam water interface and carry out vapor-liquid separation, the high temperature and pressure saturated vapor of generation
(10~13MPa of steam pressure, 311~331 DEG C of vapor (steam) temperature) send paramount pressure after being overheated into steam superheater 15
Electric user, be sent into vapor heat exchanger A 18 after being depressurized into decompressor 17, vapor heat exchanger B 19 is burnt, or enter and subtract
Warm decompressor 14 is sent to each low-pressure steam user after carrying out desuperheat, decompression；
5) monitor the raw coke oven gas inlet outlet pressure differential of vapor heat exchanger A 18 on-line, automatically switch when pressure difference reaches 1.5KPa
To vapor heat exchanger B 19, the steam/water circulating process of vapor heat exchanger B 19 is identical with vapor heat exchanger A 18；At the same time,
Take in the high pressure superheated steam of the generation of steam superheater 15 all the way, producing 550 DEG C of low-pressure superheated steams through decompressor 17 leads to
Enter in vapor heat exchanger A 18 and start on-line decoking, when stopping when product is clean water of burning that vapor heat exchanger A 18 is discharged is burnt
It is burnt；
6) sewerage that waste heat boiler 13 produces in process of production, sewage well 11 is discharged into through periodical blowdown expander 10.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of coal oven dithio-gas heat recovery process free of discontinuities, it is characterised in that include the following steps：
1) from coke oven through 650~750 DEG C derived from tedge, gas collecting tube of raw coke oven gas, after hot precipitator dedusting, into waste heat
Boiler；
2) the vapor heat exchanger A that coal oven dithio-gas enters in waste heat boiler exchanges heat, and raw coke oven gas inlet temperature is 640~660
DEG C, 25~40m/s of mean flow rate, heat exchanger tube tube wall temperature are not less than 320 DEG C；Raw gas temperature after heat exchange drop to 350 DEG C with
Under, into low-temperature zone residual neat recovering system；
3) monitor the raw coke oven gas import and export pressure difference of vapor heat exchanger A on-line, when pressure difference reaches more than 1.5KPa, automatically switch
To vapor heat exchanger B, while cut off the pipeline between vapor heat exchanger A and drum；Then, it is passed through more than 550 DEG C of low pressure mistake
Hot steam and high temperature compressed air, burn vapor heat exchanger A, burn product when vapor heat exchanger A discharges for cleaning
Stop burning during water；
4) room temperature demineralized water temperature after deoxygenation is 104 DEG C, is introduced into cryogenic heat exchanger, the high temperature heat conductive oil produced with heating furnace
Exchange heat for heat source, temperature reaches more than 210 DEG C of boiler feedwater and enters drum after heat exchange, then enters steam from down-comer
Heat exchanger A；Demineralized water is heated to be after steam water interface by raw coke oven gas in vapor heat exchanger A returns to drum through tedge, in vapour
Steam-water separation is carried out in bag, produces 10~13MPa of pressure, the high-pressure saturated steam that 311~331 DEG C of temperature；
5) high-pressure saturated steam further send steam superheater, and the high pressure superheated steam of generation is sent to high-voltage power user；Or
Be passed through vapor heat exchanger A as low-pressure superheated steam after reduced pressure treatment, vapor heat exchanger B is burnt, then or through desuperheat
Used after reduced pressure treatment for low-pressure steam user；
6) boiler feedwater is continued to be heated by down-comer into vapor heat exchanger A again, carries out circulation in cycles；When system is supervised
When measuring vapor heat exchanger A cokings, down-comer of the water through vapor heat exchanger B in drum starts to exchange heat into vapor heat exchanger B
And then produce steam.
2. a kind of coal oven dithio-gas heat recovery process free of discontinuities according to claim 1, it is characterised in that confirming to open
After beginning burns flow, all the way through reduced pressure treatment, pressure will be reduced in more than 550 DEG C high pressure superheated steams of step 4) generation
It is sent into after below 0.1MPa in vapor heat exchanger A；Increasing quantity of steam is alternately and repeatedly carried out during this, reduces the behaviour of quantity of steam
Make, prevent coke button peeling rate is too fast from resulting in blockage；When temperature reaches more than 500 DEG C in vapor heat exchanger A, high-temperature high-pressure is passed through
Contracting air starts to burn.
A kind of 3. coal oven dithio-gas heat recovery process free of discontinuities according to claim 1, it is characterised in that the heating
In stove, conduction oil is heated using the coal gas quoted from outer net, by heat-conducting oil heating to after more than 300 DEG C, is passed into low temperature
Deaerated feedwater in heat exchanger with 100~110 DEG C exchanges heat, and deaerated feedwater is heated to more than 210 DEG C, and low after heat exchange is led
Deep fat returns to heating furnace circulating-heating.
A kind of 4. coal oven dithio-gas heat recovery process free of discontinuities according to claim 1, it is characterised in that the steam
Superheater carries out Overheating Treatment using coke dry quenching furnace recyclegas as heat source, to the high temperature and pressure saturated vapor that drum produces, and makes it
Temperature reaches more than 550 DEG C.
A kind of 5. coal oven dithio-gas heat recovery process free of discontinuities according to claim 1, it is characterised in that the waste heat
Boiler is casing quenching waste heat boiler.
6. a kind of coal oven dithio-gas heat recovery process free of discontinuities according to claim 1, it is characterised in that in waste heat pot
Steam-air decoking method is used in stove, by the use of more than 550 DEG C of low-pressure superheated steams as heat source is burnt, removes steam heat-exchanging
The tar produced in device A, vapor heat exchanger B.
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| CN201711405020.7A CN108036290A (en) | 2017-12-22 | 2017-12-22 | A kind of coal oven dithio-gas heat recovery process free of discontinuities |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590789A (en) * | 2018-07-05 | 2018-09-28 | 中冶焦耐(大连)工程技术有限公司 | A kind of coal oven dithio-gas sensible heat and red burnt sensible heat cogeneration technique and system |
| CN109611820A (en) * | 2018-12-14 | 2019-04-12 | 江西庞泰环保股份有限公司 | A kind of relieving haperacidity waste heat recovery apparatus and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108590789A (en) * | 2018-07-05 | 2018-09-28 | 中冶焦耐(大连)工程技术有限公司 | A kind of coal oven dithio-gas sensible heat and red burnt sensible heat cogeneration technique and system |
| CN109611820A (en) * | 2018-12-14 | 2019-04-12 | 江西庞泰环保股份有限公司 | A kind of relieving haperacidity waste heat recovery apparatus and method |
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Application publication date: 20180515 |