CN104178193B - Coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation technology and system - Google Patents
Coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation technology and system Download PDFInfo
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- CN104178193B CN104178193B CN201410408287.1A CN201410408287A CN104178193B CN 104178193 B CN104178193 B CN 104178193B CN 201410408287 A CN201410408287 A CN 201410408287A CN 104178193 B CN104178193 B CN 104178193B
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Abstract
The invention provides a kind of coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation technology and system, raw coal is divided into smalls and beans through raw coal preheating hierarchy system, the coal gas utilizing self method to produce is as the thermal source of the smalls pyrolysis in smalls pyrolysis oven, the pyrolysis coal gas that smalls pyrolysis produces is as the thermal source of beans pyrolysis, hot semicoke after smalls and beans pyrolysis is as formcoke from hot briquetting preparation raw material, and the coke tar refuse that pyrolysis of coal section is collected substitutes the formcoke from hot briquetting preparation binding agent of a part.The present invention utilizes coal pyrolysis technique to be coupled with formcoke from hot briquetting preparation technology production formed coke, realize the classified utilization of coal, realize mill coal coking, for country saves rare coking coal resource, and the high value added utilization of product semicoke, adopt the coke tar refuse of pyrolysis of coal section generation as portion of binder, the consumption of the coal-tar pitch that Substitute For Partial price is higher, realizes the object of refuse reclamation simultaneously, utilizes hot semicoke for raw material, hot condition compacted under, heating efficiency is high.
Description
Technical field
The present invention relates to technical field of coal chemical industry, be specifically related to a kind of coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation technology and system.
Background technology
Chinese coal reserves account for 12% of worldwide coal resource, China's low-rank coal standing stock account for about 50% of coal reserves, output accounts for 30% of current total amount, as the raw material of production metallurgy coke---and coking coal resource is then very rare, and reserves are not as good as 10% of coal total reserves.
Low-rank coal is due to high-moisture, and high-volatile, low heat value, and the feature of very easily spontaneous combustion, thus be unsuitable for standing storage and long-distance transportation, be considered a kind of low-grade coal resource for a long time.But by pyrolysis, this low-grade coal then can produce the solid semicoke product of the pyrolysis coal gas of high added value, tar and high fixed carbon, high heating value.Pyrolysis coal gas can as the raw material of town gas, chemical industry synthesis; Tar can obtain China's petrol and diesel oil in short supply by deep processing; Semicoke as steam coal, also can pass through shaping alternative metallurgical coke, thus eliminates the rare impact caused metallurgy industry of China's coking coal resource.
The technology utilizing pyrolysis of coal semicoke to prepare formed coke at present has coldmoulding and hot-forming according to mold temperature condition, wherein simple, the save energy of hot-briquetting modeling process.Therefore be coupled formcoke from hot briquetting technology of pyrolysis of coal is utilized to be the more satisfactory scheme of manufacture formed coke.
At present publication number is had to be " system and method for a kind of pyrolysis coke powder comprehensive high-efficiency production of shaped coal and formed coke " of CN103361093A about the invention of pyrolysis of coal coupling formcoke from hot briquetting, the scheme that this invention provides is for obtain semi-coke powder and coal tar by pulverized coal pyrolysis, then utilize semi-coke powder for raw material, coal tar, as binding agent, obtains industrial shaped coke by hot-forming, charing.
The shortcoming that this patent exists is:
1, the pyrolysis coal gas dedusting technology efficiency of dust collection of this technology is not high, and in the tar of recovery, dust content is high;
2, this technology high added value tar of utilizing technique self to produce is as the binding agent producing formed coke, and production cost is high.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation technology, adopt the hot semicoke of pyrolysis of coal generation as formed coke principle, the coke tar refuse that pyrolysis of coal produces substitutes the binding agent that a part produces formed coke, reduce binding agent to be used for, cost-saving.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation technology, is characterized in that, comprise the steps:
A, raw coal is divided into smalls and beans through raw coal preheating hierarchy system;
B, smalls is sent into the pyrolysis of smalls pyrolysis oven, beans sends into the pyrolysis of beans pyrolysis oven;
The smalls pyrolysis coal gas that c, smalls pyrolysis produce is sent in beans pyrolysis oven as the thermal source of beans pyrolysis, and the high-temperature semi-coke powder that smalls pyrolysis produces and the high-temperature semi-coke grain that beans pyrolysis produces are sent in formcoke from hot briquetting preparation system as formed coke raw material;
The filter material layer that d, beans are formed in beans pyrolysis oven filters smalls pyrolysis coal gas, carries out obtaining clean gas after meticulous dedusting reclaims tar with cooling to the pyrolysis coal gas after filtering,
E, filter the tar reclaimed, the liquid oils obtained exports as tar products, and the coke tar refuse obtained is sent in formcoke from hot briquetting preparation system as binding agent;
F, clean gas are divided into four parts, a part is sent in formcoke from hot briquetting preparation system as charing carrier gas, a part is sent in formcoke from hot briquetting preparation system as fuel, and a part is sent in pyrolysis gas-fired furnace as pyrolysis carrier gas, and another part is sent in gas-fired furnace as fuel;
G, pyrolysis carrier gas become coal gas of high temperature after being heated indirectly, and send in smalls pyrolysis oven as the thermal source of smalls pyrolysis, and the high-temperature flue gas that pyrolysis gas-fired furnace produces is sent in raw coal preheating hierarchy system as the thermal source of raw coal preheating;
The pyrolysis coal gas produced in h, formcoke from hot briquetting preparation system is sent in beans pyrolysis oven as the thermal source of beans pyrolysis, and the flue gas produced in formcoke from hot briquetting preparation system is directly emptying.
The present invention adopts the pyrolysis of coal section coupling formcoke from hot briquetting section of preparation, the tar that pyrolysis of coal section is collected is obtained coke tar refuse through filtration, utilizes this coke tar refuse to substitute the formcoke from hot briquetting binding agent of a part, realize the object of refuse reclamation, reduce production cost; The hot semicoke utilizing pyrolysis of coal to produce is raw material, and at hot condition compacted under, heating efficiency is high.
The present invention adopts raw coal preheating hierarchy system raw coal to be divided into the different smalls of particle size range and beans, the coal gas utilizing self method to produce becomes coal gas of high temperature after gas-fired furnace indirect heating, as the thermal source of smalls pyrolysis, and the high temperature smalls pyrolysis coal gas produced after smalls pyrolysis is as the thermal source of beans pyrolysis, take full advantage of the waste heat of material and gas, reach the even pyrolysis of coal classification, improve the object of pyrolysis gas yield and the tar rate of recovery, and saved mass energy, production cost reduces.
The filter material layer that the present invention utilizes beans to be formed in beans pyrolysis oven carries out dedusting to the high temperature pyrolysis coal gas sending into beans pyrolysis oven, tentatively lowers the temperature, for the essence dedusting of follow-up pyrolysis coal gas and whole cold reduction burden, reach the dustiness of the tar reducing system recoveries, improve the object of tar quality and gas purification effect, utilize low temperature beans to reclaim the heat of high temperature smalls pyrolysis coal gas simultaneously, reach the recycling of heat.
Further, described formcoke from hot briquetting preparation technology comprises the steps:
1) the formed coke raw material from pyrolysis of coal section is sent in stirred pot, allocate into simultaneously coal-tar pitch and from pyrolysis of coal section reclaim coke tar refuse as binding agent, fully be uniformly mixed in stirred pot, meticulous dedusting and cooling recovery tar are carried out to the pyrolysis coal gas that whipping process produces;
2) batch mixing after mixing is sent into after utilizing forming machine extrusion molding in charring furnace and is carried out charing process;
3) carbonize gas-fired furnace to carry out heating to a part of clean gas from pyrolysis of coal section and send in charring furnace as charing thermal source carrier gas, and employing from a part of clean gas of pyrolysis of coal section as fuel;
4) high-temperature flue gas carbonizing gas-fired furnace burning generation is divided into two portions, a part carries out heat fused as thermal source to the coal-tar pitch allocated into, sends in raw coal preheating hierarchy system after the high-temperature flue gas that another part and pyrolysis gas-fired furnace produce mixes as the thermal source of raw coal preheating;
5) the high temperature pyrolysis coal gas of charing generation is sent in beans pyrolysis oven as thermal source, and the high temperature formed coke that charing produces is direct as formed coke output of products after cooling.
The a part of clean gas utilizing pyrolysis of coal to produce in the formcoke from hot briquetting section of preparation is as the thermal source carrier gas of charring furnace, part clean gas is as the fuel of charing gas-fired furnace, and high temperature pyrolysis coal gas charing produced is as the thermal source of beans pyrolysis oven, the high-temperature flue gas that charing gas-fired furnace produces is used separately as the thermal source of coal-tar pitch heating and raw coal preheating, take full advantage of waste heat, reduce production cost.
Further, bottle coal or rich coal can also be allocated in described step 1) into send in stirred pot as binder mixture.The plastic mass that the gas-fat coal that the price of mixing can be utilized relatively low is separated out in thermal state forming process, to bond raw material semicoke, substitutes part of coal pitch, reduces the consumption of coal-tar pitch further.
Preferably, the quality proportioning of described binder mixture is bottle coal or rich coal 60%, coal-tar pitch 30% and coke tar refuse 10%.
Further, the coal-tar pitch allocated in described step 1) and coke tar refuse are first sent in coal-tar pitch melting pot after heat fused, send in stirred pot as binding agent.
Further, heat exchange is carried out in the low-temperature carbonization carrier gas that the high temperature formed coke carbonizing generation in described step 5) is sent in water cooler and from pyrolysis of coal section, cooled formed coke directly exports as product, and charing carrier gas is sent in charing gas-fired furnace and heated further after preheating.The clean gas entered before charing gas-fired furnace carries out heat exchange as the charing carrier gas cooled and high temperature formed coke, play this clean gas of preheating and reduce the effect of high temperature formed coke temperature, take full advantage of waste heat, reduce the firing rate of follow-up charing gas-fired furnace.
Preferably, the coal gas of high temperature temperature produced in described step g is 650 ~ 750 DEG C, can heat, complete flashing speed oven to smalls fast fluidization.Utilize coal gas of high temperature to carry out fluidisation flashing speed oven to smalls, pyrolysis reactions steps in the middle of reducing, reduce Thermal desorption effluent in the residence time of high-temperature zone, avoid the secondary pyrolysis of precipitate, improve the productive rate of pyrolysis coal gas and tar.
The present invention also provides a kind of coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation system for technique described in the claims, comprising:
Raw coal preheating hierarchy system, beans pyrolysis oven, smalls pyrolysis oven, pyrolysis gas treatment system, formcoke from hot briquetting preparation system, pyrolysis gas-fired furnace; The discharge port of described raw coal preheating hierarchy system is connected with the feeding mouth of beans pyrolysis oven with smalls pyrolysis oven respectively; The pyrolysis gas exit of described beans pyrolysis oven is connected with the import of pyrolysis gas treatment system, and the material outlet of beans pyrolysis oven is connected with the feed(raw material)inlet of formcoke from hot briquetting preparation system; The pyrolysis gas exit of described smalls pyrolysis oven is connected with the thermal source inlet of beans pyrolysis oven, and the material outlet of smalls pyrolysis oven is connected with the feed(raw material)inlet of formcoke from hot briquetting preparation system; Described pyrolysis gas treatment system comprises the meticulous fly-ash separator and coal gas cooling device and tar groove and tar filter vat that pipeline is connected, the pyrolysis gas exit of described beans pyrolysis oven is connected with the import of this meticulous fly-ash separator, the material outlet of described coal gas cooling device is connected with the entrance of tar groove, the liquid exit of tar filter directly exports tar products, and the solid outlet of tar filter is connected with formcoke from hot briquetting preparation system; The gas exit of described coal gas cooling device is divided into four tunnels, one tunnel is connected with the charing carrier gas inlet of formcoke from hot briquetting preparation system, one tunnel is connected with the fuel inlet of formcoke from hot briquetting preparation system, one tunnel is connected with the gas entry of pyrolysis gas-fired furnace, and another road is connected with the fuel inlet of pyrolysis gas-fired furnace; The pyrolysis gas exit of described formcoke from hot briquetting preparation system is connected with the thermal source inlet of beans pyrolysis oven, and the exhanst gas outlet of half formcoke from hot briquetting preparation system is directly communicated with air; The coal gas of high temperature outlet of described gas-fired furnace is connected with the thermal source inlet of smalls pyrolysis oven, and the exhanst gas outlet of gas-fired furnace is connected with the thermal source inlet of raw coal preheating hierarchy system.
Further, described formcoke from hot briquetting preparation system comprises:
Coal-tar pitch melting pot, stirred pot, forming machine, charring furnace, water cooler and charing gas-fired furnace; The feeding mouth of described coal-tar pitch melting pot is connected with coal-tar pitch feeding with the solid outlet of tar filter respectively, and the discharge port of coal-tar pitch melting pot is connected with the binding agent entrance of stirred pot, and the exhanst gas outlet of coal-tar pitch melting pot is directly communicated with air; The feed(raw material)inlet of described stirred pot is connected with beans pyrolysis oven with smalls pyrolysis oven respectively, and the pyrolysis gas exit of stirred pot is connected with the import of meticulous fly-ash separator, and the discharge port of stirred pot is connected with the feeding mouth of forming machine; The discharge port of described forming machine is connected with the feeding mouth of charring furnace; The pyrolysis gas exit of described charring furnace is connected with the thermal source inlet of beans pyrolysis oven, and the discharge port of charring furnace is connected with the feeding mouth of water cooler; The gas entry of described water cooler is connected with the gas exit of described coal gas cooling device, and the discharge port of water cooler directly exports formed coke product, and the gas exit of water cooler is connected with the gas entry of charing gas-fired furnace; The fuel inlet of described charing gas-fired furnace is connected with the gas exit of described coal gas cooling device, the outlet of charing gas-fired furnace coal gas of high temperature is connected with the gas entry of charring furnace, the exhanst gas outlet of charing gas-fired furnace is divided into two-way, one tunnel is connected with the smoke inlet of coal-tar pitch melting pot, and another road is connected with the thermal source inlet of raw coal preheating hierarchy system.
Further, the dust-removing powder outlet of described meticulous fly-ash separator directly exports coal dust product.
From above technical scheme, the present invention utilizes coal pyrolysis technique to be coupled with formcoke from hot briquetting preparation technology production formed coke, realize the classified utilization of coal, realize mill coal coking, for country saves rare coking coal resource, and the high value added utilization of product semicoke, adopt the coke tar refuse of pyrolysis of coal section generation as portion of binder, the consumption of the coal-tar pitch that Substitute For Partial price is higher, realize the object of refuse reclamation simultaneously, utilize hot semicoke for raw material, hot condition compacted under, heating efficiency is high.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation technology of the present invention;
The schematic diagram of Fig. 2 coal gas circulation of the present invention coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation system.
In figure: 100, raw coal preheating hierarchy system, 110, fly-ash separator, 120, desulfurizer, 101, raw coal, 102, cryodrying gas, 103, beans, 104, smalls, 111, dried tail gas, 112, dirt powder, 121, tail gas;
200, beans pyrolysis oven, 201, pyrolysis coal gas, 202, high-temperature semi-coke grain;
300, smalls pyrolysis oven, 301, smalls pyrolysis coal gas, 302, high-temperature semi-coke powder;
400, pyrolysis gas treatment system, 410, meticulous fly-ash separator, 420, coal gas cooling device, 430, tar groove, 440, tar filter, 411, coal dust, 412, smart dedusting pyrolysis gas, 421, reclaim tar, 422, clean gas, 423, carrier gas is carbonized, 424, fuel one, 425, pyrolysis carrier gas, 426, fuel two, 441, tar products, 442, coke tar refuse;
500, formcoke from hot briquetting preparation system, 510, coal-tar pitch melting pot, 520, stirred pot, 530, forming machine, 540, charring furnace, 550, water cooler, 560, charing gas-fired furnace, 501, coal-tar pitch, 502, bottle coal or rich coal, 511, binding agent, 512, flue gas, 521, stirred pot pyrolysis coal gas, 522, batch mixing, 531, low temperature formed coke, 541, charring furnace pyrolysis gas, 542, high temperature formed coke, 551, formed coke product, 552, preheating charing carrier gas, 561, charing coal gas of high temperature, 562, high-temperature flue gas one, 563, melting pot carrier gas, 564, raw coal preheated carrier gas,
600, pyrolysis gas-fired furnace, 601, pyrolysis coal gas of high temperature, 602, high-temperature flue gas two, 603, mixed flue gas.
Embodiment
Below in conjunction with accompanying drawing, a kind of preferred implementation of the present invention is described in detail.
As shown in Figure 2, coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation system of the present invention comprises: raw coal preheating hierarchy system 100, beans pyrolysis oven 200, smalls pyrolysis oven 300, pyrolysis gas treatment system 400, formcoke from hot briquetting preparation system 500, pyrolysis gas-fired furnace 600.Described raw coal preheating hierarchy system also comprises fly-ash separator 110 and desulfurizer 120; Described pyrolysis gas treatment system comprises meticulous fly-ash separator 410, coal gas cooling device 420, tar groove 430 and tar filter 440; Described formcoke from hot briquetting preparation system comprises coal-tar pitch melting pot 510, stirred pot 520, forming machine 530, charring furnace 540, water cooler 550 and charing gas-fired furnace 560.
Described raw coal preheating hierarchy system 100 take raw coal as raw material, the high-temperature flue gas that its thermal source is discharged by pyrolysis gas-fired furnace and charing gas-fired furnace provides, it is provided with smalls, three outlets of beans and cryodrying gas, wherein the outlet of smalls is connected with smalls pyrolysis oven feeding mouth, the outlet of beans is connected with beans pyrolysis oven feeding mouth, the outlet of cryodrying gas is connected with the entrance of fly-ash separator, the outlet of described fly-ash separator is connected with the entrance of desulfurizer, the dirt powder outlet of fly-ash separator is connected with the material inlet of smalls pyrolysis oven, the outlet of described desulfurizer is communicated with air.
The coal gas of high temperature that the thermal source of described smalls pyrolysis oven 300 is carried by pyrolysis gas-fired furnace provides, smalls pyrolysis oven is provided with smalls pyrolysis gas exit and high-temperature semi-coke powder outlet, smalls pyrolysis gas exit is connected with the thermal source inlet of beans pyrolysis oven, and high-temperature semi-coke powder outlet is connected with the feed(raw material)inlet of stirred pot.
The thermal source of described beans pyrolysis oven 200 stirs by smalls pyrolysis generation, stirred pot Raw the high temperature pyrolysis coal gas producing and carbonize in charring furnace generation to be provided, beans pyrolysis oven is provided with pyrolysis gas exit and the outlet of high-temperature semi-coke grain, wherein pyrolysis gas exit is connected with the pyrolysis gas entrance of meticulous fly-ash separator, and the outlet of high-temperature semi-coke grain is connected with the feed(raw material)inlet of stirred pot.
The dust-removing powder outlet of described meticulous fly-ash separator 410 is directly as coal dust output of products, the pyrolysis gas outlet of meticulous fly-ash separator is connected with the entrance of coal gas cooling device, the material outlet of coal gas cooling device 420 is connected with the entrance of tar groove, the outlet of tar groove is connected with the entrance of tar filter, the liquid exit of tar filter directly exports as tar products, and the solid outlet of tar filter is connected with described coal-tar pitch melting pot entrance.The gas exit of coal gas cooling device is divided into four tunnels, one tunnel is connected with the gas entry of water cooler, one tunnel is connected with the fuel inlet of charing gas-fired furnace, and a road is connected with the gas entry of pyrolysis gas-fired furnace, and another road is connected with the fuel inlet of pyrolysis gas-fired furnace.
The thermal source of described coal-tar pitch melting pot 510 is provided by the part high-temperature flue gas carbonizing gas-fired furnace conveying, coal-tar pitch melting pot is provided with the entrance for adding asphalt stock, the exhanst gas outlet of coal-tar pitch melting pot is communicated with air, and the feeding mouth of coal-tar pitch melting pot is connected with the entrance of stirred pot.
Described stirred pot 520 pyrolysis gas outlet is connected with the import of meticulous fly-ash separator, and the discharge port of stirred pot is connected with moulder inlet.In order to reduce the coal-tar pitch consumption allocated into further, the feed(raw material)inlet for adding gas-fat coal can be set on stirred pot.
The described discharge port of forming machine 530 is connected with the feeding mouth of charring furnace, and forming machine adopts a kind of roller briquetting machine, and forming pressure is about 50MPa.
The thermal source of described charring furnace 540 is provided by the coal gas of high temperature carbonizing gas-fired furnace conveying, and the pyrolysis gas outlet of charring furnace is connected with the thermal source inlet of beans pyrolysis oven, and the discharge port of charring furnace is connected with the feeding mouth of water cooler.
The discharge port of described water cooler 550 is directly as formed coke output of products, and the gas exit of water cooler is connected with the gas entry of charing gas-fired furnace.
The coal gas of high temperature outlet of described charing gas-fired furnace 560 is connected with the gas entry of charring furnace, the exhanst gas outlet of charing gas-fired furnace is divided into two-way, one tunnel is connected with the smoke inlet of coal-tar pitch melting pot, and another road is connected with the thermal source inlet of raw coal preheating hierarchy system.
Described pyrolysis gas-fired furnace 600 is provided with coal gas of high temperature outlet and high-temperature flue gas outlet, and wherein coal gas of high temperature outlet is connected with the thermal source inlet of smalls pyrolysis oven, and high-temperature flue gas outlet is connected with the thermal source inlet of raw coal preheating hierarchy system.
With reference to Fig. 1, the flow process of coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation technology of the present invention is described below:
Utilize preheating hierarchy system 100 to be divided into by raw coal 101 and be less than or equal to the smalls 104 of 5mm and the beans 103 of 5 ~ 50mm, utilize mixed flue gas 603 pairs of raw coal to carry out preheating and drying, the 300 DEG C high-temperature flue gas 602 of this mixed flue gas from pyrolysis gas-fired furnace and the raw coal preheated carrier gas 564 of charing gas-fired furnace simultaneously.The dried tail gas 111 of cryodrying gas 102 after fly-ash separator 110 dedusting that preheating hierarchy system produces is delivered in desulfurizer 120, tail gas 121 is formed emptying after desulfurization process, enter smalls pyrolysis oven 300 after the dirt powder 112 of this fly-ash separator mixes with smalls 104, described beans 103 enters pyrolysis in beans pyrolysis oven 200.
Wherein smalls pyrolysis oven 300 utilizes the coal gas of high temperature of 650 ~ 750 DEG C 601 pairs of smalls fast fluidization heating from pyrolysis gas-fired furnace, flashing speed oven, the smalls pyrolysis coal gas 301 of 600 ~ 650 DEG C that pyrolysis is formed enters beans pyrolysis oven 200, for beans pyrolysis provides thermal source, the filter material layer that beans is formed in pyrolysis oven simultaneously filters smalls pyrolysis coal gas, by in pyrolysis gas >=dust catching of 20 μm gets off, after beans filter material layer dust removal by filtration, the pyrolysis coal gas 201 of about 200 DEG C is sent into pyrolysis gas treatment system 400 and is carried out meticulous dedusting and tar is reclaimed in cooling.The high-temperature semi-coke powder 302 of 550 ~ 600 DEG C produced in smalls pyrolysis oven enters the raw material as formcoke from hot briquetting in the stirred pot in formcoke from hot briquetting preparation system 500 together with the high-temperature semi-coke grain 202 of 500 ~ 550 DEG C that produce in beans pyrolysis oven.
The pyrolysis coal gas 201 of beans pyrolysis oven conveying first carries out meticulous dedusting, dust-removing powder after meticulous dedusting directly exports as coal dust product 411, smart dedusting pyrolysis gas 412 after meticulous dedusting is sent in coal gas cooling device 420, after recovery eliminates tar, export low temperature clean gas 422, reclaiming tar 421 enters in tar groove 430, then send in tar filter 440 and filter, the liquid oils obtained exports as final tar products 441, and the tar filter coke tar refuse 442 of tackling is as the binding agent of formcoke from hot briquetting.
By the coke tar refuse 442 of collecting coal-tar pitch 501 heat fused in coal-tar pitch melting pot with outsourcing, and adopt high-temperature flue gas from charing gas-fired furnace as melting pot carrier gas 563 for coal-tar pitch melting pot provides thermal source, the flue gas 512 of generation is directly emptying.Coal-tar pitch hydrothermal solution after fusing is delivered in stirred pot 520 as the binding agent 511 producing formed coke, the high-temperature semi-coke grain 202 produced with the high-temperature semi-coke powder 302 produced from smalls pyrolysis and beans pyrolysis is fully uniformly mixed in stirred pot, and the bottle coal that can simultaneously allocate into or rich coal 502 carry out Substitute For Partial coal-tar pitch.The stirred pot pyrolysis coal gas 521 produced in process sends into dedusting in meticulous fly-ash separator, the batch mixing 522 mixing output in stirred pot utilizes forming machine 530 to extrude and forms low temperature formed coke 531, low temperature formed coke is sent into charring furnace charing, the thermal source of charring furnace is from about the 1000 DEG C charing coal gas of high temperature 561 carbonizing gas-fired furnace conveying, charring furnace pyrolysis gas 541 after charing enters in beans pyrolysis oven as thermal source, and the high temperature formed coke 542 after charing is sent into cooling in water cooler 550 and exported formed coke product 551.
Described clean gas 422 exports and is divided into four parts, a part is sent in water cooler 550 as cooling charing carrier gas 423 and is carried out heat exchange with high temperature formed coke 542, carbonize carrier gas temperature after heat exchange and raise formation preheating charing carrier gas 552, enter in charing gas-fired furnace, deliver to after being heated to 1000 DEG C further in charring furnace; A clean gas part is sent in charing gas-fired furnace 560 as fuel 1, and the high-temperature flue gas 1 of generation is divided into two-way, and a road is sent in coal-tar pitch melting pot as thermal source, and raw coal preheating hierarchy system is sent into as thermal source in another road; A clean gas part is warming up to 650 ~ 750 DEG C as pyrolysis carrier gas 425 further by pyrolysis gas-fired furnace 600, forms pyrolysis coal gas of high temperature 601, sends into the thermal source of smalls pyrolysis oven 300 as smalls pyrolysis; A clean gas in addition part is sent in pyrolysis gas-fired furnace as fuel 2 426, the high-temperature flue gas 2 602 of about 300 DEG C produced after the burning of this pyrolysis gas-fired furnace be mixed to form mixed flue gas 603 from a part of high-temperature flue gas carbonize gas-fired furnace, as in the thermal source feeding raw coal preheating hierarchy system 100 of raw coal preheating.
The above embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determine.
Claims (10)
1. a coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation technology, is characterized in that, comprise the steps:
A, raw coal is divided into smalls and beans through raw coal preheating hierarchy system;
B, smalls is sent into the pyrolysis of smalls pyrolysis oven, beans sends into the pyrolysis of beans pyrolysis oven;
The smalls pyrolysis coal gas that c, smalls pyrolysis produce is sent in beans pyrolysis oven as the thermal source of beans pyrolysis, and the high-temperature semi-coke powder that smalls pyrolysis produces and the high-temperature semi-coke grain that beans pyrolysis produces are sent in formcoke from hot briquetting preparation system as formed coke raw material;
The filter material layer that d, beans are formed in beans pyrolysis oven filters smalls pyrolysis coal gas, carries out obtaining clean gas after meticulous dedusting reclaims tar with cooling to the pyrolysis coal gas after filtering;
E, filter the tar reclaimed, the liquid oils obtained exports as tar products, and the coke tar refuse obtained is sent in formcoke from hot briquetting preparation system as binding agent;
F, clean gas are divided into four parts, a part is sent in formcoke from hot briquetting preparation system as charing carrier gas, a part is sent in formcoke from hot briquetting preparation system as fuel, and a part is sent in pyrolysis gas-fired furnace as pyrolysis carrier gas, and another part is sent in gas-fired furnace as fuel;
G, pyrolysis carrier gas become coal gas of high temperature after being heated indirectly, and send in smalls pyrolysis oven as the thermal source of smalls pyrolysis, and the high-temperature flue gas that pyrolysis gas-fired furnace produces is sent in raw coal preheating hierarchy system as the thermal source of raw coal preheating;
The pyrolysis coal gas produced in h, formcoke from hot briquetting preparation system is sent in beans pyrolysis oven as the thermal source of beans pyrolysis, and the flue gas produced in formcoke from hot briquetting preparation system is directly emptying.
2. coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation technology according to claim 1, it is characterized in that, described formcoke from hot briquetting preparation technology comprises the steps:
1) the formed coke raw material from pyrolysis of coal section is sent in stirred pot, allocate into simultaneously coal-tar pitch and from pyrolysis of coal section reclaim coke tar refuse as binding agent, fully be uniformly mixed in stirred pot, meticulous dedusting and cooling recovery tar are carried out to the pyrolysis coal gas that whipping process produces;
2) batch mixing after mixing is sent into after utilizing forming machine extrusion molding in charring furnace and is carried out charing process;
3) carbonize gas-fired furnace to carry out heating to a part of clean gas from pyrolysis of coal section and send in charring furnace as charing thermal source carrier gas, and employing from a part of clean gas of pyrolysis of coal section as fuel;
4) high-temperature flue gas carbonizing gas-fired furnace burning generation is divided into two portions, a part carries out heat fused as thermal source to the coal-tar pitch allocated into, sends in raw coal preheating hierarchy system after the high-temperature flue gas that another part and pyrolysis gas-fired furnace produce mixes as the thermal source of raw coal preheating;
5) the high temperature pyrolysis coal gas of charing generation is sent in beans pyrolysis oven as thermal source, and the high temperature formed coke that charing produces is direct as formed coke output of products after cooling.
3. coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation technology according to claim 2, is characterized in that, can also allocate bottle coal or rich coal into and send in stirred pot as binder mixture in described step 1).
4. coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation technology according to claim 3, it is characterized in that, the quality proportioning of described binder mixture is bottle coal or rich coal 60%, coal-tar pitch 30% and coke tar refuse 10%.
5. coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation technology according to claim 2, it is characterized in that, the coal-tar pitch allocated in described step 1) and coke tar refuse are first sent in coal-tar pitch melting pot after heat fused, send in stirred pot as binding agent.
6. coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation technology according to claim 2, it is characterized in that, heat exchange is carried out in the low-temperature carbonization carrier gas that the high temperature formed coke carbonizing generation in described step 5) is sent in water cooler and from pyrolysis of coal section, cooled formed coke directly exports as product, and charing carrier gas is sent in charing gas-fired furnace and heated further after preheating.
7. coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation technology according to claim 1, it is characterized in that, the coal gas of high temperature temperature produced in described step g is 650 ~ 750 DEG C, can heat, complete flashing speed oven to smalls fast fluidization.
8., for a coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation system for technique described in claim 1, it is characterized in that, comprising:
Raw coal preheating hierarchy system (100), beans pyrolysis oven (200), smalls pyrolysis oven (300), pyrolysis gas treatment system (400), formcoke from hot briquetting preparation system (500), pyrolysis gas-fired furnace (600);
The discharge port of described raw coal preheating hierarchy system (100) is connected with the feeding mouth of beans pyrolysis oven with smalls pyrolysis oven respectively;
The pyrolysis gas exit of described beans pyrolysis oven (200) is connected with the import of pyrolysis gas treatment system, and the material outlet of beans pyrolysis oven is connected with the feed(raw material)inlet of formcoke from hot briquetting preparation system;
The pyrolysis gas exit of described smalls pyrolysis oven (300) is connected with the thermal source inlet of beans pyrolysis oven, and the material outlet of smalls pyrolysis oven is connected with the feed(raw material)inlet of formcoke from hot briquetting preparation system;
Described pyrolysis gas treatment system (400) comprises the meticulous fly-ash separator (410) and coal gas cooling device (420) and tar groove (430) and tar filter vat (440) that pipeline is connected, the pyrolysis gas exit of described beans pyrolysis oven is connected with the import of this meticulous fly-ash separator, the material outlet of described coal gas cooling device is connected with the entrance of tar groove, the liquid exit of tar filter directly exports tar products, and the solid outlet of tar filter is connected with formcoke from hot briquetting preparation system;
The gas exit of described coal gas cooling device (420) is divided into four tunnels, one tunnel is connected with the charing carrier gas inlet of formcoke from hot briquetting preparation system, one tunnel is connected with the fuel inlet of formcoke from hot briquetting preparation system, one tunnel is connected with the gas entry of pyrolysis gas-fired furnace, and another road is connected with the fuel inlet of pyrolysis gas-fired furnace;
The pyrolysis gas exit of described formcoke from hot briquetting preparation system (500) is connected with the thermal source inlet of beans pyrolysis oven, and the exhanst gas outlet of half formcoke from hot briquetting preparation system is directly communicated with air;
The coal gas of high temperature outlet of described gas-fired furnace (600) is connected with the thermal source inlet of smalls pyrolysis oven, and the exhanst gas outlet of gas-fired furnace is connected with the thermal source inlet of raw coal preheating hierarchy system.
9. coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation system according to claim 8, it is characterized in that, described formcoke from hot briquetting preparation system (500) comprising:
Coal-tar pitch melting pot (510), stirred pot (520), forming machine (530), charring furnace (540), water cooler (550) and charing gas-fired furnace (560);
The feeding mouth of described coal-tar pitch melting pot (510) is connected with coal-tar pitch feeding with the solid outlet of tar filter respectively, the discharge port of coal-tar pitch melting pot is connected with the binding agent entrance of stirred pot, and the exhanst gas outlet of coal-tar pitch melting pot is directly communicated with air;
The feed(raw material)inlet of described stirred pot (520) is connected with beans pyrolysis oven with smalls pyrolysis oven respectively, and the pyrolysis gas exit of stirred pot is connected with the import of meticulous fly-ash separator, and the discharge port of stirred pot is connected with the feeding mouth of forming machine;
The discharge port of described forming machine (530) is connected with the feeding mouth of charring furnace;
The pyrolysis gas exit of described charring furnace (540) is connected with the thermal source inlet of beans pyrolysis oven, and the discharge port of charring furnace is connected with the feeding mouth of water cooler;
The gas entry of described water cooler (550) is connected with the gas exit of described coal gas cooling device, and the discharge port of water cooler directly exports formed coke product, and the gas exit of water cooler is connected with the gas entry of charing gas-fired furnace;
The fuel inlet of described charing gas-fired furnace (560) is connected with the gas exit of described coal gas cooling device, the outlet of charing gas-fired furnace coal gas of high temperature is connected with the gas entry of charring furnace, the exhanst gas outlet of charing gas-fired furnace is divided into two-way, one tunnel is connected with the smoke inlet of coal-tar pitch melting pot, and another road is connected with the thermal source inlet of raw coal preheating hierarchy system.
10. coal gas circulation coal wholegrain radial sector pyrolysis coupling formcoke from hot briquetting preparation system according to claim 8, is characterized in that, the dust-removing powder outlet of described meticulous fly-ash separator directly exports coal dust product.
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