CN203700277U - Gas-flow ejecting dense-phase fast carbonization upgrading system for low-rank coal - Google Patents
Gas-flow ejecting dense-phase fast carbonization upgrading system for low-rank coal Download PDFInfo
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- CN203700277U CN203700277U CN201420039341.5U CN201420039341U CN203700277U CN 203700277 U CN203700277 U CN 203700277U CN 201420039341 U CN201420039341 U CN 201420039341U CN 203700277 U CN203700277 U CN 203700277U
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Abstract
The utility model relates to a gas-flow ejecting dense-phase fast carbonization upgrading system for low-rank coal. The carbonization upgrading system comprises a dehydration treating system, a carbonization upgrading system and a gas supply system, wherein the gas supply system is used for supplying heat for the dehydration treating system and the carbonization upgrading system. According to the utility model, the dehydration treating and carbonization upgrading on low-rank coal are combined, and three products of semi-coke, tar and coal gas are produced. The carbonization upgrading system has the characteristics of simple process, convenience and quickness in operation, low investment, small covering area, no discharge of dust and other pollutants during the whole process, environmental friendliness, energy conservation and high efficiency; the carbonization upgrading system realizes the clean transformation of low-rank coal, and meets the requirement of continuous mass production.
Description
Technical field
The utility model relates to a kind of low-rank coal upgrading system of processing, particularly relates to the close quick destructive distillation upgrading system mutually of a kind of low-rank coal airflow injection.
Background technology
Low-rank coal refers to the coal that degree of coalification is lower, mainly comprises brown coal and sub-bituminous coal, and the low-rank coal resource in the whole world exceedes 5,100 hundred million tons, accounts for 49.1% of world's coal total resources.China has abundant low-rank coal resource, and explored brown coal retained reserve reaches 1,303 hundred million tons, accounts for nearly 13% of national coal reserves.Because low-rank coal moisture is high, ash content is high, easy-weathering and spontaneous combustion, be difficult to washing and storage, the development and utilization of low-rank coal is very limited, how better reasonable development, utilize low-rank coal resource, alleviate the energy resource supply of growing tension, become the widespread consensus of countries in the world.
For the inherent characteristics of low-rank coal, all kinds of method for upgrading are also not quite similar.Low-rank coal upgrading generally has three kinds of methods: the one, low-rank coal is dried with physical method, and remove moisture, ash content; The 2nd, dry heat solution, after low-rank coal is dried, carries out high temperature pyrolysis, removes moisture and most of volatile; The 3rd, low-rank coal is made to coal water slurry, after being processed, coal water slurry uses as fuel.
Drying and dehydrating method is the most easy method for upgrading, because this method has only reduced the water content in low-rank coal, has removed a small amount of ash content, and little to the quality improving effect of low-rank coal, coal is not fully utilized, and the loss amount of coal is large, upgrading DeGrain.
Chinese invention patent prospectus CN 102492518 A disclose a kind of high ash content low-rank coal process for upgrading, it is that the particle of 6～13mm is sent into one-level fluidized bed dryer that raw coal is chosen particle diameter through crushing and screening, coal contacts with the flue gas adverse current from hotblast stove, direct heating, surface water in coal dust is removed, controlling the dry temperature of one-level is 105～120 ℃, dried flue gas is through bag-type dusting and after blower fan supercharging, a part is utilized with the hot flue gas mixed cycle from hotblast stove, another part discharge; Enter secondary fluidized-bed through the dried coal of one-level, coal contacts with the flue gas adverse current from hotblast stove, direct heating, internal water and ash content in coal dust are removed, the temperature of controlling secondary drying is 310～330 ℃, dried flue gas, through bag-type dusting and after blower fan supercharging, is sent into heating cycle in hotblast stove and is used; Dried coal dust enters fluidized bed cooler and rare gas element counter current contact is cooling, and cooled rare gas element is sent into air cooler through blower fan and recycled after cooling after cyclone dust removal; After dry, also cooled coal enters winnowing machine, removes ash content, reaches upgrading object.This method can be removed moisture and the ash content in coal, but owing to adopting flue gas heating, the improper accident of easily blasting of remaining oxygen control in flue gas; Volatile matter in coal dust is not well reclaimed, is processed, and makes a low multiple use; There is efflorescence in low-rank coal, have a large amount of coal dusts along with ash content runs off in the last sorting stage in heat drying process, and the loss amount of coal is large.
Chinese invention patent prospectus CN 101760267 A disclose the method for a kind of brown coal coal water slurry processed, first raw material brown coal are made to coal water slurry through crusher, coal pulverizer, after coal water slurry pressurization, send into annular-pipe reactor, before annular-pipe reactor, arrange direct-connected and with the endless tube interchanger of sleeve pipe, reacted hot coal slurry is sent into inner tube and carried out heat exchange.For further improving coal slurry temperature, front tube at annular-pipe reactor arranges electromagnetic heater outward, coal water slurry stops 15～35 minutes in annular-pipe reactor, under pressure 6.0～12.0MPa, 200～300 ℃ of conditions of temperature, react, reacted hot coal is starched the inner tube that enters endless tube interchanger, temperature is reduced to below 100 ℃, enters slurry tank.In slurry tank, add sinking agent, the clear water on slurry tank upper strata send coal pulverizer, and the coal water slurry that slurry tank lower floor concentration is higher send boiler as fuel after filtration.This method complex technical process, operational condition harshness, causes equipment investment and power consumption large; Meanwhile, the comprehensive utilization degree of these method brown coal is low, does not make full use of the feature that brown coal volatile matter is high, thereby has lost coal gas and the tar resource that can extract.
Comparatively speaking, the dry heat solution of low-rank coal can make full use of the quality characteristic of low-rank coal, and it is fully utilized to exploitation, has effectively extracted the recyclable component of wherein each class, is a kind of method that has promotion prospect.The ultimate principle of low-rank coal dry thermal cracking upgrading technology, is that low-rank coal removes after moisture, carries out destructive distillation under the condition of anoxybiotic, high temperature, generates the process of coal gas, tar and semicoke.This method, according to the difference of heating medium, is divided into gaseous heat-carrier pyrolytic technique and solid heat carrier pyrolysis technology.Gaseous heat-carrier pyrolytic technique, by being used hot gas low-rank coal to be heated to pyrolysis for thermal source; Solid thermal carriers technology is to use hot solids to mix with low-rank coal as thermal source (high temperature semicoke or porcelain ball etc.), utilizes the sensible heat of solid thermal carriers that low-rank coal is heated to pyrolysis.
The relative solid heat carrier pyrolysis technology of gaseous heat-carrier pyrolytic technique, succinct, the easy to operate easy control of its technological process, the tar content that produces in pyrolytic process is large, oil quality good.But, the pyrolysis generally adopting is at present generally high-temperature flue gas with gaseous heat-carrier, and in pyrolytic process, high-temperature flue gas directly contacts with low-rank coal, causes pyrogenous origin coal gas to reduce gas quality owing to sneaking into flue gas, the caloric power of gas of producing is very low, is generally about 300～500kcal/Nm
3, affected greatly the quality of coal gas; If adopt the mode of indirect heating, because between gaseous heat-carrier and heated low-rank coal, heat transfer coefficient is little, rate of heat transfer is low, cause the calorific loss of flue gas large, thermo-efficiency that install is low, increased energy expenditure.
Chinese invention patent application prospectus CN 103409152 A disclose a kind of high heat value gas thermal barrier low-rank coal process for upgrading and system, technical scheme is for to send into former low-rank coal in drying oven, the flue gas drying of temperature in quilt, dried low-rank coal enters carries out pyrolysis in pyrolysis oven, obtain semicoke and pyrolysis gas, semicoke is transmitting system after the cooling of Quench dish Quench, pyrolysis gas enters quenching column after tornado dust collector are isolated coal dust, the reverse tar ingredients directly contacting in washing pyrolysis gas of coal tar of coming with tower top circulation in quenching column, pyrolysis gas after washing cooling enters in electrical tar precipitator, after carrying, pyrolysis gas recirculation blower is divided into three parts through electrically trapped tar oil pyrolysis gas after treatment: first part's pyrolysis gas is sent into pyrolysis heater as fuel, the high-temperature flue gas that burning produces carries out indirect heating to the second section pyrolysis gas of sending into pyrolysis heater, pyrolysis gas after heating is delivered to pyrolysis oven and is directly contacted with dried low-rank coal as gaseous heat-carrier, for the pyrolytic reaction of low-rank coal provides thermal source, Part III pyrolysis gas is sent into fuel and the coal dust mixed firing as a supplement of coal-fired blast furnace, and the middle temperature flue gas of generation is sent into drying oven inner drying low-rank coal after dedusting.This method is used flue gas after coal and pyrolysis gas burning as the dry thermal medium of low-rank coal, because heating flue gas directly contacts with low-rank coal, in hot flue gas the control of oxygen level particularly important, if misoperation is easy to occur spontaneous combustion, or even explosion hazard; Because temperature temperature between 360～420 ℃ of pyrolysis gas is higher, use circulation tar to carry out cooling washing to it, can make lower boiling light constituent in tar volatilize and sneak in pyrolysis gas, thereby affect the quality product of tar and pyrolysis gas; Pyrolysis gas as thermal barrier is atmospheric operation with tar counter current contact wash cooling process in quenching column, and there is no air isolation measure, has in inclusion of air pyrolysis gas the accident of easily blasting in the time of heat temperature raising; When low-rank coal pyrolysis, pyrolysis gas is blown into from pyrolysis oven bottom, this kind of type of heating, granularity to low-rank coal there are certain requirements, if the undersized of coal, resistance when pyrolysis gas is blown into is large, and low-rank coal easy efflorescence in the time being subject to heated drying, while causing pyrolysis gas to be blown into, power consumption increases; Pyrolysis gas is blown into from pyrolysis furnace bottom, affected by the factor such as gas velocity, raw meal particle size, easily causes the low-rank coal inequality of being heated.
Summary of the invention
The purpose of this utility model is to provide the close quick destructive distillation upgrading system mutually of a kind of low-rank coal airflow injection.
The purpose of this utility model is achieved through the following technical solutions:
According to the close quick system of destructive distillation upgrading mutually of a kind of low-rank coal airflow injection of the present utility model, it is characterized in that: comprise processed system, destructive distillation upgrading system and for processed system and destructive distillation upgrading system provide the airing system of thermal source,
Described processed system comprises raw material cabin, raw material coal dust injector, the injection power gas source of water trap and raw material coal dust injector, the heat source system of well heater in low order coal dust heat source and water trap, low order coal dust discharge port in described raw material cabin is connected by injection material feeding mouth with raw material coal dust injector by pipeline, the injection power gas source entrance of raw material coal dust injector is connected with the air outlet I of superheated vapour sub-cylinder by pipeline, described water trap is made up of the well heater of the built-in cyclonic separator that is positioned at water trap top and water trap bottom, the gas-solid mixing discharge port of raw material coal dust injector is connected with the gas-solid mixture entrance of the cyclonic separator arranging in water trap by pipeline, be provided with exhaust steam escape pipe at described water trap top, bottom is provided with dehydration low-rank coal discharge port,
Described destructive distillation upgrading system comprises the dehydration coal dust injector being connected with water trap bottom dehydration low-rank coal discharge port, the injection power gas source entrance of dehydration coal dust injector is connected with the coal gas escape pipe of hotblast stove by pipeline, and the gas-solid mixing discharge port of dehydration coal dust injector is connected with the entrance of dense-phase air decompression mixer, the discharge port of dense-phase air decompression mixer is connected by injection material feeding mouth by pipeline and ejecting supercharger, the injection power gas source entrance of ejecting supercharger is connected with the coal gas escape pipe of hotblast stove by pipeline, the gas-solid mixing discharge port of ejecting supercharger is connected with pyrolysis reactor, the cyclonic separator that described pyrolysis reactor internal upper part is provided with, middle part is provided with thermo-cracking chamber, bottom is provided with semicoke water cooler, the gas-solid mixture import of the gas-solid mixture discharge port of the described ejecting supercharger cyclonic separator built-in with pyrolysis reactor is connected, the solid materials outlet of cyclonic separator bottom is connected with the thermo-cracking chamber inlet of pyrolysis reactor, the solid materials outlet of the thermo-cracking chamber of pyrolysis reactor is connected with the entrance of the semicoke water cooler of pyrolysis reactor, be provided with the raw gas venting port containing tar on the top of pyrolysis reactor, the pyrogenous origin raw gas containing tar of described low-rank coal and the described isolated low-rank coal pyrolysis of cyclonic separator coal gas are connected with gas purification recovery and processing system by pipeline via venting port, are provided with semicoke outlet for product in the bottom of described pyrolysis reactor,
In described semicoke water cooler, be provided with cooling tubulation, the entrance of the heat-eliminating medium of semicoke water cooler is connected with desalination water pot with desalination water pump by pipeline, and the superheated vapour air outlet of semicoke water cooler is connected with the air intake of superheated vapour sub-cylinder;
The cyclonic separator arranging in described water trap is by the pneumatic outlet at gas-solid mixture entrance, spiral duct and top, and the solid outlet of bottom forms;
The well heater arranging in described water trap is imported and exported and is formed by heat exchanging pipe and heating medium, the entrance of heater heats medium is connected with the air outlet II of superheated vapour sub-cylinder by pipeline, and the air outlet of heater heats medium is connected with desalination water pot entrance by pipeline;
Described gas purification recovery and processing system comprises by pipeline and the gas cooler being connected containing the raw gas venting port of tar, on gas cooler, be also provided with cold de-salted water import and de-salted water outlet, described de-salted water outlet is connected with desalination water pot entrance, described cold de-salted water entrance is frozen media outlet with refrigerator and is connected, refrigerator is frozen medium inlet and is connected with de-salted water pump discharge by pipeline, be provided with tar outlet in gas cooler bottom, be provided with gas exit in gas cooler middle and lower part, the gas exit of described gas cooler is connected with gas-liquid separator, on gas-liquid separator, be provided with purified gas venting port and tar outlet, described purified gas venting port is connected with gas compressor and gas holder, the tar outlet that gas cooler bottom arranges is connected with coal tar storage tank with the tar outlet arranging on gas-liquid separator, described gas holder is connected with hotblast stove by coal gas transfer roller.
The utility model has the advantages that:
Because the utility model has adopted the close quick destructive distillation upgrading system mutually of above-mentioned low-rank coal airflow injection, produce semicoke, tar and three kinds of products of coal gas by this system, have that technique is simple, a simple operation, equipment investment is few, floor space is little, all processes does not have the pollutant emission environmental friendliness such as dust, efficient energy-saving feature; Realize the clean conversion of low-rank coal, reached the requirement of continuous large-scale production; In production process, do not have flue gas and rare gas element to enter, coal gas, tar and the semicoke quality of therefore producing are good, and productive rate is high; Adopt unique heated by gas pyrolysis way, well solved the problem of local superheating coking; The capacity usage ratio of whole system is high, substantially realizes the self-equilibrating of internal system energy; All treating processes has all realized anoxybiotic operation, has thoroughly solved the security hidden trouble of the existence of prior art.
Accompanying drawing explanation
Fig. 1 is the close quick destructive distillation upgrading system block diagram mutually of low-rank coal airflow injection of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, the close quick system of destructive distillation upgrading mutually of a kind of low-rank coal airflow injection of the present utility model, is characterized in that: comprise processed system, destructive distillation upgrading system and for processed system and destructive distillation upgrading system provide the airing system of thermal source,
Described processed system comprises raw material cabin 1, raw material coal dust injector 2, the injection power gas source of water trap 4 and raw material coal dust injector 2, the heat source system of well heater 4-3 in low order coal dust heat source and water trap 4, low order coal dust discharge port in described raw material cabin 1 is connected by injection material feeding mouth by pipeline and raw material coal dust injector 2, the injection power gas source entrance of raw material coal dust injector 2 is connected with the air outlet I 20 of superheated vapour sub-cylinder 19 by pipeline, described water trap 4 is by being built in the cyclonic separator 4-2 on water trap 4 tops and the well heater 4-3 of water trap 4 bottoms forms, the gas-solid mixing discharge port of raw material coal dust injector 2 is connected with the gas-solid mixture entrance of the cyclonic separator 4-2 of water trap 4 interior settings by pipeline 3, be provided with exhaust steam escape pipe 4-1 at described water trap 4 tops, bottom is provided with dehydration low-rank coal discharge port 4-5,
The cyclonic separator 4-2 of described water trap 4 interior settings is by the pneumatic outlet at gas-solid mixture entrance, spiral duct and top, and the solid outlet of bottom forms; The well heater 4-3 of described water trap 4 interior settings is imported and exported and is formed by heat exchanging pipe and heating medium, the entrance of well heater 4-3 heating medium is connected with the air outlet II 21 of superheated vapour sub-cylinder 19 by pipeline, and the air outlet of well heater 4-3 heating medium is connected with desalination water pot 15 entrances by pipeline.
Described destructive distillation upgrading system of the present utility model comprises the dehydration coal dust injector 5 being connected with water trap 4 bottom dehydration low-rank coal discharge port 4-5, the injection power gas source entrance of dehydration coal dust injector 5 is connected with the coal gas escape pipe of hotblast stove 18 by pipeline, and the gas-solid mixing discharge port of dehydration coal dust injector 5 is connected with the entrance of dense-phase air decompression mixer 6, the discharge port of dense-phase air decompression mixer 6 is connected by injection material inlet by pipeline and ejecting supercharger 7, the injection power gas source entrance of ejecting supercharger 7 is connected with the escape pipe of the coal gas of hotblast stove 18 by pipeline, the gas-solid mixing discharge port of ejecting supercharger 7 is connected with pyrolysis reactor 8, the cyclonic separator 8-1 that described pyrolysis reactor 8 internal upper parts are provided with, middle part is provided with thermo-cracking chamber 8-2, bottom is provided with semicoke water cooler 8-3, the gas-solid mixing discharge port of described ejecting supercharger 7 is connected with the gas-solid mixture import of cyclonic separator 8-1, the solid materials outlet of the bottom of cyclonic separator 8-1 is connected with the entrance of thermo-cracking chamber 8-2, the solid materials outlet of thermo-cracking chamber 8-2 is connected with the entrance of semicoke water cooler 8-3, be provided with the raw gas venting port 9 containing tar on the top of pyrolysis reactor 8, raw gas and the isolated low-rank coal pyrolysis of cyclonic separator 8-1 coal gas containing tar that described low-rank coal pyrolysis cracking generates are connected with gas purification recovery and processing system by pipeline via venting port 9, be provided with semicoke outlet for product in the bottom of described pyrolysis reactor 8
In described semicoke water cooler 8-3, be provided with cooling tubulation, the entrance 8-I of the heat-eliminating medium of semicoke water cooler 8 is connected with desalination water pot 15 with desalination water pump 16 by pipeline, and the superheated vapour air outlet 8-II of semicoke water cooler 8-3 is connected with the air intake of superheated vapour sub-cylinder 19.
Carrying out after processed, for energy-saving and cost-reducing object, the exhaust steam recycle that the well heater 4-3 that water trap top is arranged discharges, introduce desalination water pot 15 by pipeline, also the de-salted water heat-eliminating medium outlet 10-2 of gas cooler 10 is also introduced to desalination water pot 15, recycle by pipeline simultaneously.
Gas purification recovery and processing system described in the utility model comprises by pipeline and the gas cooler 10 being connected containing the raw gas venting port 9 of tar, on gas cooler 10, be also provided with cold de-salted water import 10-1 and de-salted water outlet 10-2, described de-salted water outlet 10-2 is connected with desalination water pot 15 entrances, described cold de-salted water entrance 10-1 is connected with the outlet of the refrigerant on refrigerator 17, refrigerant entrance on refrigerator 17 is connected with 16 outlets of desalination water pump by pipeline, be provided with tar outlet 10-3 in gas cooler 10 bottoms, be provided with gas exit 10-4 in gas cooler middle and lower part, the gas exit 10-4 of described gas cooler 10 is connected with gas-liquid separator 11, on gas-liquid separator 11, be provided with purified gas venting port 11-1 and tar outlet 11-2, described purified gas venting port 11-1 is connected with gas compressor 12 and gas holder 13, the tar outlet 10-3 that gas cooler bottom arranges is connected with coal tar storage tank with the tar outlet 11-2 arranging on gas-liquid separator 11, described gas holder 13 is connected with hotblast stove 18 by coal gas transfer roller 14.
In the time carrying out destructive distillation upgrading, consider that the low-rank coal pyrolysis gas temperature that pyrolysis reactor 8 discharges is higher, therefore, adopt coal-gas recovering cleaning treatment system after the gas disposal of low-rank coal pyrolyzing coal, to utilize coal gas transfer roller 14 to be transported to hotblast stove 18, after hotblast stove 18 is to low-rank coal pyrolysis heated by gas, deliver to dehydration coal dust injector 5 and the interior power gas source as injector of ejecting supercharger 7 and low order coal dust heat source by pipeline, realize the closed cycle of coal gas, eliminated the hidden danger that in coal gas, entrained air is blasted.
Adopt the close system of quick destructive distillation upgrading mutually of a kind of low-rank coal airflow injection of the present utility model to carry out processed and destructive distillation upgrading to low-rank coal, concrete steps are as follows:
(1) raw material low-rank coal is broken into the low order coal dust that mean diameter is 0.05mm～2mm, under negative pressure state, custody transfer is in raw material cabin 1, and the incoming stock coal dust injector 2 that flows automatically, injection power gas source using the superheated vapour of 260 ℃～350 ℃ from superheated vapour sub-cylinder 19 air outlet I 20 as raw material coal dust injector 2, low order coal dust enters transport pipe 3 by raw material coal dust injector 2 by this superheated vapour injection and with after it mixes, low order coal dust in transport pipe 3, be suspended state therewith superheated vapour heat exchange be warmed up to 150 ℃～180 ℃, remove the surface water of low-rank coal,
(2) the low order coal dust that removes surface water is entered in the built-in cyclonic separator 4-2 of water trap 4 and is carried out gas solid separation by transport pipe 3, the isolated low order coal dust of cyclonic separator 4-2 enters in the well heater 4-3 of water trap 4 bottoms, isolated exhaust steam is discharged from venting port 4-1, low-rank coal pruinescence in well heater 4-3 is from 260 ℃～350 ℃ of superheated vapour indirect heating temperature raising to 260 of superheated vapour sub-cylinder 19 air outlet II 21 ℃～290 ℃, and at the interior stop of water trap 4 30min～60min, remove deep layer and crystal water in low order coal dust; Moisture content in low order coal dust is down to below 3%;
Described destructive distillation upgrading be by through step (2) temperature after treatment be that the dehydration low order coal dust of 260 ℃～290 ℃ is sent in dehydration coal dust injector 5, to be heated to the low-rank coal pyrolysis coal gas of 700 ℃～800 ℃ by hotblast stove as the injection power gas source of dehydration coal dust injector 5, dehydration low order coal dust enters in dense-phase air decompression mixer 6 by low order pyrolysis of coal coal gas injection and with after it mixes by dehydration coal dust injector 5, and dehydration low order coal dust is the interior low-rank coal pyrolysis heated by gas temperature raising to 350 being mixed with it of dense-phase air decompression mixer 6 ℃～600 ℃;
By through step (3) temperature after treatment be that the dehydration low order coal dust of 350 ℃～600 ℃ is sent into ejecting supercharger 7 by dense-phase air decompression mixer 6, to be heated to the low-rank coal pyrolysis coal gas of 700 ℃～800 ℃ by hotblast stove as injection power gas source and dehydration low order coal dust heat source, the dehydration low order coal dust being flowed out by dense-phase air decompression mixer 6 is carried out to secondary injection supercharging and temperature raising; By the temperature increase to 650 of low order coal dust ℃～750 ℃, form high temperature low order coal dust;
Through step (4) high temperature low order coal dust after treatment enter in the cyclonic separator 8-1 in pyrolysis reactor 8, carry out gas solid separation by cyclonic separator 8-1, the isolated high temperature low order of cyclonic separator 8-1 coal dust enters in the cracking room 8-2 at pyrolysis reactor 8 middle parts and carries out heat scission reaction, high temperature low order coal dust maintains the temperature at 550 ℃～650 ℃ in the cracking room 8-2 of pyrolysis reactor 8, the residence time is 40 min～120min, carries out abundant thermo-cracking and generates semicoke and the raw gas containing tar;
(6) the semicoke water cooler 8-3 that the semicoke that thermo-cracking generates arranges through pyrolysis reactor 8 bottoms carries out heat exchange cooling with the cold de-salted water of sending through desalination water pump 16 from desalination water pot 15, cooled semicoke is as finished product packing, and cold de-salted water generates superheated vapour and enters superheated vapour sub-cylinder 19 after heat exchange;
(7) enter from coal gas escape pipe 9 the raw gas purifying recycling that gas purification recovery and processing system contains tar containing the raw gas of tar.
Preferably, raw gas purifying recycling described in the utility model, that the raw gas containing tar is discharged into gas cooler 10 from pyrolysis reactor 8 tops by pipeline 9, after gas cooler 10 cools and isolates more than 99% tar, enter the interior further gas-liquid separation of gas-liquid separator 11, isolate two kinds of products of burnt oil and gas; Coal gas is sent in gas holder 13 by gas compressor 12, as after the injection power gas source of hotblast stove fuel, dehydration coal dust injector 5 or ejecting supercharger 7 and heating as low order coal dust heat hot carrier, or send as coal gas product.Thus, the low-rank coal coal-char combustion characteristic that adopts the utility model to produce is better than common upgrading semicoke that process is produced, and coal gas and quality of coke tar are good, and the semicoke point of ignition that produces is low, calorific value is high, combustion stability good, intensity is large, the not spontaneous combustion of transporting for long-distance; And the tar studies on asphaltene content that produces extremely low, added value is large, follow-up deep processing is convenient, economical; In institute's producing coal gas, owing to there is no rare gas element or stack gas, purity and the calorific value of coal gas are high.All any modifications of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model within spirit of the present utility model and principle.
Claims (4)
1. the close quick system for destructive distillation upgrading mutually of low-rank coal airflow injection, is characterized in that: comprise processed system, destructive distillation upgrading system and for processed system and destructive distillation upgrading system provide the airing system of thermal source,
Described processed system comprises the heat source system of well heater in injection power gas source, low order coal dust heat source and the water trap of raw material cabin, raw material coal dust injector, water trap and raw material coal dust injector; Low order coal dust discharge port in described raw material cabin is connected by injection material feeding mouth with raw material coal dust injector by pipeline, and the injection power gas source entrance of raw material coal dust injector is connected with the air outlet I of superheated vapour sub-cylinder by pipeline; Described water trap is made up of the well heater of the built-in cyclonic separator that is positioned at water trap top and water trap bottom, the gas-solid mixing discharge port of raw material coal dust injector is connected with the gas-solid mixture entrance of the cyclonic separator arranging in water trap by pipeline, be provided with exhaust steam escape pipe at described water trap top, bottom is provided with dehydration low-rank coal discharge port;
Described destructive distillation upgrading system comprises the dehydration coal dust injector being connected with water trap bottom dehydration low-rank coal discharge port, the injection power gas source entrance of dehydration coal dust injector is connected with the coal gas escape pipe of hotblast stove by pipeline, and the gas-solid mixing discharge port of dehydration coal dust injector is connected with the entrance of dense-phase air decompression mixer, the discharge port of dense-phase air decompression mixer is connected by injection material feeding mouth by pipeline and ejecting supercharger, the injection power gas source entrance of ejecting supercharger is connected with the escape pipe of the coal gas of hotblast stove by pipeline, the gas-solid mixing discharge port of ejecting supercharger is connected with pyrolysis reactor, described pyrolysis reactor internal upper part is provided with cyclonic separator, middle part is provided with thermo-cracking chamber, bottom is provided with semicoke water cooler, the gas-solid mixing discharge port of described ejecting supercharger is connected with the gas-solid mixture import of cyclonic separator, the solid materials outlet of the bottom of cyclonic separator is connected with the entrance of thermo-cracking chamber, the solid materials outlet of thermo-cracking chamber is connected with the entrance of semicoke water cooler, be provided with the raw gas venting port containing tar on the top of pyrolysis reactor, pyrogenous origin raw gas and the isolated low-rank coal pyrolysis of the cyclonic separator coal gas containing tar of described low-rank coal is connected with gas purification recovery and processing system by pipeline via venting port, be provided with semicoke outlet for product in the bottom of described pyrolysis reactor
In described semicoke water cooler, be provided with cooling tubulation, the entrance of the heat-eliminating medium of semicoke water cooler is connected with desalination water pot with desalination water pump by pipeline, and the superheated vapour air outlet of semicoke water cooler is connected with the air intake of superheated vapour sub-cylinder.
2. the close system of quick destructive distillation upgrading mutually of low-rank coal airflow injection of stating according to claim 1, is characterized in that the cyclonic separator of setting in described water trap is by the pneumatic outlet at gas-solid mixture entrance, spiral duct and top, the solid outlet composition of bottom.
3. the close system of quick destructive distillation upgrading mutually of low-rank coal airflow injection of stating according to claim 1, it is characterized in that the well heater arranging in described water trap is made up of heat exchanging pipe, heating medium import and heating medium outlet, the import of heater heats medium is connected with the air outlet II of superheated vapour sub-cylinder by pipeline, and the outlet of heater heats medium is connected with desalination water pot entrance by pipeline.
4. the close system of quick destructive distillation upgrading mutually of low-rank coal airflow injection of stating according to claim 1, it is characterized in that described gas purification recovery and processing system comprises by pipeline and the gas cooler being connected containing the raw gas venting port of tar, on gas cooler, be also provided with cold de-salted water import and de-salted water outlet, described de-salted water outlet is connected with desalination water pot entrance, described cold de-salted water entrance is frozen media outlet with refrigerator and is connected, refrigerator is frozen medium inlet and is connected with de-salted water pump discharge by pipeline, be provided with tar outlet in gas cooler bottom, be provided with gas exit in gas cooler middle and lower part, the gas exit of described gas cooler is connected with gas-liquid separator, on gas-liquid separator, be provided with purified gas venting port and tar outlet, described purified gas venting port is connected with gas compressor and gas holder, the tar outlet that gas cooler bottom arranges is connected with coal tar storage tank with the tar outlet arranging on gas-liquid separator, described gas holder is connected with hotblast stove by coal gas transfer roller.
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| CN201420039341.5U CN203700277U (en) | 2014-01-22 | 2014-01-22 | Gas-flow ejecting dense-phase fast carbonization upgrading system for low-rank coal |
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| CN201420039341.5U CN203700277U (en) | 2014-01-22 | 2014-01-22 | Gas-flow ejecting dense-phase fast carbonization upgrading system for low-rank coal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103756698A (en) * | 2014-01-22 | 2014-04-30 | 鞍山兴德工程技术有限公司 | Low-grade coal gas flow injection dense-phase quick dry distillation upgrading method and system |
| CN106661476A (en) * | 2014-07-23 | 2017-05-10 | 新日铁住金工程技术株式会社 | Method for producing modified coal and device for producing modified coal |
-
2014
- 2014-01-22 CN CN201420039341.5U patent/CN203700277U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103756698A (en) * | 2014-01-22 | 2014-04-30 | 鞍山兴德工程技术有限公司 | Low-grade coal gas flow injection dense-phase quick dry distillation upgrading method and system |
| CN106661476A (en) * | 2014-07-23 | 2017-05-10 | 新日铁住金工程技术株式会社 | Method for producing modified coal and device for producing modified coal |
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