CN202717747U - Brown coal dry distillation device using coal hot air furnace as heat supply - Google Patents
Brown coal dry distillation device using coal hot air furnace as heat supply Download PDFInfo
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- CN202717747U CN202717747U CN 201220345213 CN201220345213U CN202717747U CN 202717747 U CN202717747 U CN 202717747U CN 201220345213 CN201220345213 CN 201220345213 CN 201220345213 U CN201220345213 U CN 201220345213U CN 202717747 U CN202717747 U CN 202717747U
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Abstract
The utility model relates to a brown coal dry distillation device using a coal hot air furnace as heat supply. A high-temperature flue gas outlet of the coal hot air furnace is communicated with a hot flue gas inlet of a drying furnace, a low-temperature flue gas outlet of the drying furnace is connected with an inlet of a dust catcher, the inlet of the dust catcher is connected with an inlet of the circulating fan, and an outlet of the circulating fan is connected with the hot flue gas inlet of the drying furnace; and a gas inlet of a burner is connected with a hot gas outlet of a quenching coke furnace, a high-temperature flue gas outlet of the burnet is communicated with a hot flue gas inlet of a dry distillation furnace, a raw gas outlet of the dry distillation furnace is connected with an inlet of a gas purifying and separating system, a outlet of the gas purifying and separating system is connected with an inlet of a gas booster fan, a outlet of the gas booster fan is respectively connected with a cold gas inlet and a gas consumption unit of the quenching coking furnace, and the hot gas outlet of the quenching coking furnace is connected with the gas consumption unit. The high-temperature flue gas adopting the coal hot air furnace is used as a brown coal dry heat source. Compared to the dry distillation gas as a dry heat source, the device has a large amount of surplus dry distillation gas for other uses.
Description
Technical field
The utility model relates to a kind of Coalhotairfurnace that utilizes as the brown coal destructive distillation device of system's heat supply.
Background technology
Coal decomposes under the secluding air condition becomes the technological process of the destructive distillation products such as coal gas, tar and coke (or semicoke) to be referred to as coal carbonization technique, the difference that is heated outlet temperature by coal charge can be divided into high temperature, middle temperature or low-temperature pyrolysis, it is generally acknowledged that 500～700 ℃ are low-temperature pyrolysis, the high volatile class coals such as brown coal, long-flame coal or bottle coal are applicable to low-temperature pyrolysis, the destructive distillation type of furnace that present this type of coal is selected mostly is the strange three sections stoves in Shandong or vertical blue charcoal side stove, and its combustion heat supplying mode mostly is the internal heat type technique of Direct Contact Heating.Internal heat type technique is directly to enter by gaseous heat-carrier (mostly be gas-fired produce high-temperature flue gas) to pass block coal seam coal supply material in the gas retort and conduct heat, this technique have conduct heat fast, efficient is high, homogeneous heating, equipment are simple, the investment advantage such as province.By internal heat type destructive distillation processing, coal is changed into gas (coal gas), liquid (tar), solid (semicoke) three kinds of products, have preferably economic benefit and social benefit.But at present in the destructive distillation complete processing of this type of coal, required drying and carbonization thermal source all is the coal gas that produces from system's destructive distillation, be about to dry distillation gas as low side purposes such as combustion heat supplyings, quenching or using waste heat from tail gas fail better to be reclaimed or utilize, and cause a large amount of higher-grade thermal waste.And water content very high (between 25%-65%) in the low order coals such as brown coal, need a large amount of heats to make its drying, although the low order coals such as brown coal gas yield when destructive distillation is very high, but existing technology and device are when the low order coals such as destructive distillation processing brown coal, technique itself has consumed whole or most dry distillation gases, does not have or seldom have the outer confession of coal gas output.Existing technique and device only use lumped coal simultaneously, and the coal a large amount of in small, broken bits that produces in exploitation and crushing and screening process or fine coal can't obtain using, and cause the waste of a large amount of precious resources, and its economic benefit is restricted simultaneously.
The utility model content
The purpose of this utility model is to overcome the deficiency that prior art exists, and provides a kind of with the brown coal destructive distillation device of Coalhotairfurnace as heat supply.
The purpose of this utility model is achieved through the following technical solutions:
With the brown coal destructive distillation device of Coalhotairfurnace as heat supply, comprise drying oven, gas retort and quenching stove, the discharge port of described drying oven is communicated with the opening for feed of gas retort, the discharge port of gas retort is communicated with the opening for feed of quenching stove, the discharge port of quenching stove is provided with the sealed discharging system, it is characterized in that: also be provided with Coalhotairfurnace, the high-temperature flue gas outlet of described Coalhotairfurnace is connected with the decontamination chamber, the high-temperature flue gas outlet of decontamination chamber connects the hot gas approach of drying oven, the low-temperature flue gas outlet of drying oven is connected to the import of fly-ash separator, the import of fly-ash separator is connected to the import of recirculation blower, and the outlet of recirculation blower is connected to the hot gas approach of drying oven; The gas inlet of burner links to each other with the heating gas outlet of quenching stove, the high-temperature flue gas outlet of burner is communicated to the hot gas approach of gas retort, the raw gas outlet of gas retort is connected to the import of gas purification separation system, the outlet of gas purification separation system is connected to the import of coal gas booster fan, the outlet of coal gas booster fan is connected to respectively the cooled coal gas import of quenching stove and with gas unit and decontamination chamber, the outlet of the heating gas of quenching stove is connected to gas unit and decontamination chamber.
Further, above-mentioned with the brown coal destructive distillation device of Coalhotairfurnace as heat supply, wherein, the feed end of described drying oven is provided with the crushing and screening device, and the lump coal outlet of described crushing and screening device links to each other with the opening for feed of drying oven; The coal export in small, broken bits of described crushing and screening device links to each other with the opening for feed of Coalhotairfurnace.
Further, above-mentioned with the brown coal destructive distillation device of Coalhotairfurnace as heat supply, wherein, the coal export in small, broken bits of described crushing and screening device connects coal drying installation in small, broken bits, and the discharge port of coal drying installation in small, broken bits links to each other with the opening for feed of Coalhotairfurnace.
Further, above-mentioned with the brown coal destructive distillation device of Coalhotairfurnace as heat supply, wherein, the outlet of the high-temperature flue gas of described decontamination chamber is connected to the air distribution outlet of burner.
Further, above-mentioned with the brown coal destructive distillation device of Coalhotairfurnace as heat supply, wherein, described drying oven is provided with the wet flue gas discharge outlet.
A step ground again, above-mentioned with the brown coal destructive distillation device of Coalhotairfurnace as heat supply, wherein, described sealed discharging system is the air sealer that discharges of the coke.
The substantive distinguishing features of technical solutions of the utility model and progressive being mainly reflected in:
The utility model is novel in design, adopt the high-temperature flue gas of Coalhotairfurnace as the lump coal drying source, low-quality coal in small, broken bits through high-temperature flue gas that Coalhotairfurnace burning produces as coal carbonization technology in raw coal drying even the required thermal source of destructive distillation, because dry heat dissipation is far away more than the destructive distillation heat dissipation when the low order coals such as processing brown coal, and gas yield is also relatively high during the low order coal destructive distillation such as brown coal, so than adopting dry distillation gas as the lump coal drying source, this technique a large amount of dry distillation gases of having more than needed out, the a large amount of dry distillation gases that save then are used as him in addition, and economic benefit is higher; Dry quenching(of coke) reclaims a large amount of waste heats of high temperature semicoke for destructive distillation, and dry quenching(of coke) makes that sulphur content is reduced in the coal gas, the more environmental protection of final discharging after the coal gas use; Technical process is succinct, and easy handling control in the production run obtains efficiently so that all resources comprise lump coal, coal in small, broken bits and coal gas, abundant and rational Application, be rated as have novelty, the good technology of creativeness, practicality.
Description of drawings
Below in conjunction with accompanying drawing technical solutions of the utility model are described further:
Fig. 1: the structural representation of the utility model device.
Embodiment
It is a kind of with the dry distillation of coal device of Coalhotairfurnace as heat supply that the utility model provides, and utilizes the high-temperature flue gas of low-quality raw coal combustion generation in small, broken bits as the required thermal source of raw coal drying even destructive distillation in the dry distillation of coal system, and save dry distillation gas as high-end use.
As shown in Figure 1, with the brown coal distillation process device of Coalhotairfurnace as heat supply, comprise drying oven 1, gas retort 2 and quenching stove 3, drying oven 1 is provided with wet flue gas discharge outlet G, the feed end of drying oven 1 is provided with crushing and screening device 4, the lump coal outlet of crushing and screening device 4 links to each other with the opening for feed of drying oven 1, the discharge port of drying oven 1 is communicated with the opening for feed of gas retort 2, the discharge port of gas retort 2 is communicated with the opening for feed of quenching stove 3, the discharge port of quenching stove 3 is provided with the sealed discharging system, the concrete air sealer 13 that discharges of the coke that adopts of sealed discharging system; The coal export in small, broken bits of crushing and screening device 4 links to each other with the opening for feed of coal drying installation 5 in small, broken bits, and the discharge port of coal drying installation 5 in small, broken bits links to each other with the opening for feed of Coalhotairfurnace 6; The high-temperature flue gas outlet of Coalhotairfurnace 6 is connected to the high-temperature flue gas import of decontamination chamber 7, the high-temperature flue gas outlet of decontamination chamber 7 is connected to the hot gas approach B of drying oven, the low-temperature flue gas outlet A of drying oven is connected to the import of fly-ash separator 8, the import of fly-ash separator 8 is connected to the import of recirculation blower 9, and the outlet of recirculation blower 9 is connected to the hot gas approach B of drying oven; The gas inlet of burner 12 links to each other with the heating gas outlet E of quenching stove, the high-temperature flue gas outlet of burner 12 is communicated to the hot gas approach D of gas retort, the raw gas outlet C of gas retort is connected to the import of gas purification separation system 10, the outlet of gas purification separation system 10 is connected to the import of coal gas booster fan 11, the outlet of coal gas booster fan 11 is connected to respectively the cooled coal gas import F of quenching stove and with gas unit 14 and decontamination chamber 7, the heating gas of quenching stove outlet E is connected to gas unit 14 and decontamination chamber 7.In addition, the outlet of the high-temperature flue gas of decontamination chamber 7 also is connected to the air distribution outlet of burner 12.
During the brown coal destructive distillation, brown coal drop into crushing and screening device 4 and carry out crushing and screening, the lump coal that sieves out (for example more than the 6mm) enters in the drying oven 1 through the opening for feed of the lump coal of crushing and screening device 4 outlet by drying oven 1, lump coal is at drying oven and enter stove high-temperature flue gas counter current contact, be heated to gradually 150～300 ℃ of (150 ℃ of examples, 200 ℃, 300 ℃), coal is fully dehydrated by the discharge port of the drying oven opening for feed by gas retort and is entered in the gas retort 2, coal is at gas retort 2 and enter stove high-temperature flue gas counter current contact, continue to be heated to 400～850 ℃ of (400 ℃ of examples, 600 ℃, 850 ℃), make the pyrolysis of coal destructive distillation become semicoke, overflow simultaneously coal gas and tarry vapours, hot semicoke enters in the quenching stove 3 through the discharge port of the gas retort opening for feed by the quenching stove, with the cooled coal gas counter current contact, semicoke is cooled to below 160 ℃ (specifically with this not spontaneous combustion of semicoke ingress of air, and being convenient to follow-up safety in transportation and storage is as the criterion), air sealer 13 draws off the semicoke product through the discharging of the coke;
The coal in small, broken bits that crushing and screening device 4 sieves out (for example below 6mm) enters coal drying installation 5 inner dryings in small, broken bits, dried coal in small, broken bits is sent into Coalhotairfurnace 6 burning that acts as a fuel again and is produced high-temperature flue gas, high-temperature flue gas 7 udst separations in the decontamination chamber that Coalhotairfurnace 6 produces, and in the decontamination chamber, pass into the purification coal gas of destructive distillation or the heating gas of quenching, the purification coal gas of destructive distillation or the heating gas of quenching and the reaction of the remaining oxygen in the high-temperature flue gas produce the low oxygen content high-temperature flue gas, the hot gas approach B of the low oxygen content high-temperature flue gas drying stove after the udst separation sends into that drying oven 1 is interior to be used as drying source, enter stove high-temperature flue gas and coal charge contact heat-exchanging, 70～180 ℃ wet flue gas directly discharges or discharges after dedusting through wet flue gas discharge outlet G, the low-temperature flue gas outlet A of the low-temperature flue gas drying stove in the drying oven enters in the fly-ash separator 8 by the import of fly-ash separator, low-temperature flue gas after fly-ash separator 8 is processed is through recirculation blower 9 and high-temperature flue gas air distribution from decontamination chamber 7, and the flue gas that is modulated into proper temperature sends into that drying oven 1 is interior to carry out drying to raw coal;
The coal gas that contains tarry vapours of gas retort 2 interior effusions with enter the stove high-temperature flue gas and be mixed into the low heat value raw gas and enter gas purification separation system 10 through the raw gas of gas retort outlet C, 10 pairs of raw gas dedustings of gas purification separation system, cooling, oily water separation purify, coal gas after the purification is boosted by coal gas booster fan 11, purification coal gas part after boosting is supplied with usefulness gas unit 14, a part enters in the quenching stove 3 with behind the hot semicoke contact heat-exchanging from the cooled coal gas import F of quenching stove according to quenching control needs and becomes heating gas, and a part purifies coal gas and sends into decontamination chamber 7;
According to destructive distillation control needs, a part of heating gas of quenching stove 3 is sent into burner 12 through the heating gas outlet E of quenching stove and is acted as a fuel, generate 450～900 ℃ of high-temperature flue gas with the air that enters from air inlet of combustor H or oxygen-rich air burning, 450～900 ℃ high-temperature flue gas enters gas retort 2 interior heating coal charges as high-temperature heat carrier through the hot gas approach D of gas retort and makes its destructive distillation; A part of heating gas of quenching stove 3 is supplied with usefulness gas unit 14 through the heating gas outlet E of quenching stove; A part of heating gas of quenching stove is sent into decontamination chamber 7 through the heating gas outlet of quenching stove.
It should be noted that, the high-temperature flue gas that Coalhotairfurnace 6 produces enters the distribution plenum of burner through the air distribution outlet of burner through the udst separation rear portion, enter gas retort 2 after the air distribution temperature adjustment and use, then can save or greatly reduce the consumption of dry distillation gas, make more dry distillation gas be used for high-end utilization.
Because the easy oxidized spontaneous combustion of brown coal, should be controlled at below 3～6% (for example below 3.0%, below 4.5%, below 6.0%) to oxygen level in its dry high-temperature flue gas and be advisable.
The raw material brown coal go out lump coal and coal in small, broken bits through crushing and screening, and lump coal is put in the drying oven 1 and is heated drying, and the dry coal of crossing is transported in the gas retort 2 and is heated destructive distillation, obtains hot semicoke, and hot semicoke cools off in quenching stove 3, quenching, output semicoke product.Coal in small, broken bits is as the fuel of Coalhotairfurnace 6, and the high-temperature flue gas that Coalhotairfurnace produces is as all or part of heating source of drying oven 1, to the lump coal drying treatment.Dry distillation gas and tar steam output crude tar oil and the clean dry distillation gas of normal temperature after the purifying treatment such as dedusting, cooling and tar separation in the gas retort 2.The destructive distillation thermal source partly or entirely comes from the high-temperature flue gas that dry distillation gas produces through burner 12 burnings, enter and draw in the lump outside the gas retort after the coal gas that produces with destructive distillation behind the gas retort mixes, after the purifying treatment such as dedusting cooling tar separation of gas purification separation system 10, obtain dry distillation gas.
The all or part of high-temperature flue gas that comes from the Coalhotairfurnace generation of heating source in the drying oven 1, in the high-temperature flue gas oxygen content be controlled in 0～9%(by air excess exponential sum in the control Coalhotairfurnace combustion chamber in high-temperature flue gas, pass into an amount of destructive distillation gas consumption wherein remaining oxygen its oxygen content is controlled within the scope), high-temperature flue gas is transported to drying oven after being blended into 100～400 ℃, with the reverse heat exchange of lump coal, lump coal is heated to 150～300 ℃, its moisture is evaporated into water vapour, lowered the temperature behind the hot flue gas heat exchange, be discharged from the lump outside the drying oven with water vapour, flue gas after the part cooling and the mixed gas of water vapour mix with high-temperature flue gas from Coalhotairfurnace and are blended into above-mentioned 100～400 ℃ hot cigarette mediation gas through recirculation blower 9, be delivered to again drying oven 1, so circulation.All the other flue gases and water vapour after dedusting from wet flue gas discharge outlet G emptying.
Part dry distillation gas after gas purification separation system 10 purifying treatment is transported to quenching stove 3, with the reverse heat exchange of hot semicoke, the quenching that is cooled of hot semicoke, output semicoke product, this part dry distillation gas is heated intensification after heat exchange simultaneously, the hot dry distillation gas that is heated intensification in the quenching stove 3 is transported to burner 12 and the air or the oxygen-rich air mixed firing that enter from air inlet of combustor H, produces high-temperature flue gas, and high-temperature flue gas is used for the thermal source of gas retort 2.High-temperature flue gas mixes with dry distillation gas, be transported to gas retort after being blended into 450-900 ℃ mixed gas, and from the reverse heat exchange of the moisture-free coal of drying oven, make it be heated to 450-800 ℃, temperature or low-temperature pyrolysis in the generation produce hot semicoke, thick dry distillation gas and tar steam.Hot semicoke is transferred in the quenching stove 3.Above-mentioned mixed gas is lowered the temperature after heat exchange, and be discharged from the lump outside the gas retort with thick dry distillation gas and tar steam, be transformed into dry distillation gas and crude tar oil after 10 dedustings of gas purification separation system, cooling and tar separation, a part of hot dry distillation gas is transported in the burner and oxygen-rich air mixed firing.The thermal source of gas retort is the high-temperature flue gas of Coalhotairfurnace output, or the high-temperature flue gas that produces after the dry distillation gas burning, or both mixing.
Because dry heat dissipation is far away more than the destructive distillation heat dissipation, dry quenching(of coke) reclaims a large amount of waste heats of high temperature semicoke for destructive distillation, the technical program adopts the high-temperature flue gas of Coalhotairfurnace as the lump coal drying source, than adopting dry distillation gas as the lump coal drying source, a large amount of dry distillation gases of then having more than needed out, the a large amount of dry distillation gases that save then are used as him in addition, economic benefits.Adopt simultaneously dry quenching(of coke) to make also that sulphur content is reduced in the coal gas, the more environmental protection of final discharging after coal gas uses.Be applicable to the multiple type of furnace, comprise vertical heater, three sections stoves, rotary kiln, meshbeltfurnace, fluidized-bed, fluidizing furnace etc., and be suitable for multiple coal; Technical process is succinct, easy handling control in the production run, and the industrialization construction investment economizes.
What need to understand is: the above only is preferred implementation of the present utility model; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection domain of this patent.
Claims (6)
1. with the brown coal destructive distillation device of Coalhotairfurnace as heat supply, comprise drying oven, gas retort and quenching stove, the discharge port of described drying oven is communicated with the opening for feed of gas retort, the discharge port of gas retort is communicated with the opening for feed of quenching stove, the discharge port of quenching stove is provided with the sealed discharging system, it is characterized in that: also be provided with Coalhotairfurnace, the high-temperature flue gas outlet of described Coalhotairfurnace is connected with the decontamination chamber, the high-temperature flue gas outlet of decontamination chamber connects the hot gas approach of drying oven, the low-temperature flue gas outlet of drying oven is connected to the import of fly-ash separator, the import of fly-ash separator is connected to the import of recirculation blower, and the outlet of recirculation blower is connected to the hot gas approach of drying oven; The gas inlet of burner links to each other with the heating gas outlet of quenching stove, the high-temperature flue gas outlet of burner is communicated to the hot gas approach of gas retort, the raw gas outlet of gas retort is connected to the import of gas purification separation system, the outlet of gas purification separation system is connected to the import of coal gas booster fan, the outlet of coal gas booster fan is connected to respectively the cooled coal gas import of quenching stove and with gas unit and decontamination chamber, the outlet of the heating gas of quenching stove is connected to gas unit and decontamination chamber.
2. according to claim 1 it is characterized in that: the feed end of described drying oven is provided with the crushing and screening device with the brown coal destructive distillation device of Coalhotairfurnace as heat supply, and the lump coal outlet of described crushing and screening device links to each other with the opening for feed of drying oven; The coal export in small, broken bits of described crushing and screening device links to each other with the opening for feed of Coalhotairfurnace.
3. according to claim 2 with the brown coal destructive distillation device of Coalhotairfurnace as heat supply, it is characterized in that: the coal export in small, broken bits of described crushing and screening device connects coal drying installation in small, broken bits, and the discharge port of coal drying installation in small, broken bits links to each other with the opening for feed of Coalhotairfurnace.
4. according to claim 1 with the brown coal destructive distillation device of Coalhotairfurnace as heat supply, it is characterized in that: the high-temperature flue gas outlet of described decontamination chamber is connected to the air distribution outlet of burner.
5. according to claim 1 with the brown coal destructive distillation device of Coalhotairfurnace as heat supply, it is characterized in that: described drying oven is provided with the wet flue gas discharge outlet.
6. according to claim 1 with the brown coal destructive distillation device of Coalhotairfurnace as heat supply, it is characterized in that: described sealed discharging system is the air sealer that discharges of the coke.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220345213 CN202717747U (en) | 2012-07-17 | 2012-07-17 | Brown coal dry distillation device using coal hot air furnace as heat supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220345213 CN202717747U (en) | 2012-07-17 | 2012-07-17 | Brown coal dry distillation device using coal hot air furnace as heat supply |
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| CN202717747U true CN202717747U (en) | 2013-02-06 |
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| CN 201220345213 Expired - Fee Related CN202717747U (en) | 2012-07-17 | 2012-07-17 | Brown coal dry distillation device using coal hot air furnace as heat supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732275A (en) * | 2012-07-17 | 2012-10-17 | 苏州劲仑能源科技有限公司 | Lignite dry distillation device using fire coal hot air furnace as heat supply |
| CN104531188A (en) * | 2015-01-13 | 2015-04-22 | 天华化工机械及自动化研究设计院有限公司 | Pneumatic drying and external heating type coal pyrolysis method |
-
2012
- 2012-07-17 CN CN 201220345213 patent/CN202717747U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732275A (en) * | 2012-07-17 | 2012-10-17 | 苏州劲仑能源科技有限公司 | Lignite dry distillation device using fire coal hot air furnace as heat supply |
| CN104531188A (en) * | 2015-01-13 | 2015-04-22 | 天华化工机械及自动化研究设计院有限公司 | Pneumatic drying and external heating type coal pyrolysis method |
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