CN201581051U - Preheating structure for low-temperature dry distillation of coal with high water content - Google Patents
Preheating structure for low-temperature dry distillation of coal with high water content Download PDFInfo
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- CN201581051U CN201581051U CN2009201743114U CN200920174311U CN201581051U CN 201581051 U CN201581051 U CN 201581051U CN 2009201743114 U CN2009201743114 U CN 2009201743114U CN 200920174311 U CN200920174311 U CN 200920174311U CN 201581051 U CN201581051 U CN 201581051U
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Abstract
The utility model relates to a preheating structure for low-temperature dry distillation of coal with high water content, comprising a coal storing hopper, at least one gas inlet, at least one gas outlet and a gas collecting and distributing device, wherein the upper end of the coal storing hopper is provided with a coal inlet and the lower end thereof is provided with at least one discharging outlet so as to guide out coals by preheating treatment; the gas inlet is used for preheating the coals by introducing hot gas; the gas outlet is used for guiding the gas after heat exchange out of the preheating structure; and the gas collecting and distributing device is arranged at the lower part of the coal storing hopper, is used for guiding the gas introduced from the gas inlet to a coal layer, and guiding the gas after heat exchange to the gas outlet. The preheating structure uses the waste smoke generated in the process of dry distillation to carry out preheating on lignite in the coal hopper, not only reduces the heat load in dry distillation, but also recovers the heat, and improves the heat utilization ratio, thus leading the furnace yield of unit area to be greatly improved.
Description
Technical field
The utility model relates to a kind of dry distillation of coal device, relates in particular to a kind of preheating structure of hydrogenous coal low-temperature pyrolysis.
Background technology
Destructive distillation is the reaction process of solid or organism thermal degradation under the secluding air condition.Pyrogenous result generates all gases, steam and solid residue.The mixture of gas and steam is divided into gas and liquid after cooling.Destructive distillation is human a kind of production process of being familiar with and adopting very early, as destructive distillation timber system charcoal, obtains another name for (methyl alcohol), wood vinegar etc. simultaneously.In the chemical process of coal, destructive distillation is an important method always.Coal is through after the destructive distillation, and the composition of raw material and state of aggregation all will change, and solid-state in the product, gaseous state and fluent meterial have, and can obtain semicoke, coal tar, virgin ammonia liquor and coke(oven)gas.In general, hydrogenous coal is meant the raw coal of water content more than 15%, and low-temperature pyrolysis is meant that pyrolysis temperature is controlled at the method for destructive distillation that is about about 450-500 ℃.
It is the industrial typical method that has adopted that Lu Qi-Si Pierre is covered this low-temperature pyrolysis method, and this method adopts gaseous heat-carrier internal heat type vertical continuous stove, and this lurgi gasifier is commonly called as three sections stoves in China, promptly comprises dryer section, retort section and cooling section three parts from top to down.Brown coal or by the coal cinder of brown coal compression moulding (particle diameter from top to bottom moves about 25～60mm), directly contacts with the burning gas adverse current and is heated.The water content of furnace roof raw material is higher, removes most of moisture in dryer section, and upstream about 250 ℃ of hot gass are chilled to 80～100 ℃.Dry back raw material is heated to about 450-500 ℃ in retort section by 600～700 ℃ of oxygen-free burning gas, and thermolysis takes place; Hot gas is chilled to about 250 ℃, and the semicoke of generation enters cooling section and cooled off by cold air.Semicoke is discharged back further water and air cooling.The volatile matter of selecting from retort section passes through steps such as condensation, cooling, obtains tar and pyrolysis water.
The problem that above-mentioned coal carbonization furnace commonly used at present exists is, because the brown coal water content is big, thereby causes the interior thermal load of unit surface burner hearth big, and the self produced gas amount is few, and calorific value is low.The shortcoming of lurgi gasifier is that the coal of incompatibility high-moisture carries out destructive distillation.
Summary of the invention
For this reason, technical problem to be solved in the utility model be existing coal carbonization furnace be not suitable for hydrogenous coal is carried out pyrogenous technical problem, propose a kind ofly to install coal inlet place, reduce wherein preheating structure moisture content, that be used for the hydrogenous coal low-temperature pyrolysis by coal cinder being carried out thermal pretreatment in body of heater.
For solving the problems of the technologies described above, a kind of preheating structure that is used for the hydrogenous coal low-temperature pyrolysis of the present utility model comprises:
Coal hopper, described coal hopper upper end is provided with coal inlet, and described coal hopper lower end is provided with at least one feed opening to be suitable for the coal cinder derivation through thermal pretreatment;
At least one inlet mouth, it is in order to feed hot gas so that coal cinder is carried out preheating;
At least one air outlet, it will be in order to deriving described preheating structure through the gas of heat exchange;
The gas collection distribution device, it is arranged at the bottom of described coal hopper, and described gas collection distribution device comprises: is communicated with described inlet mouth, with the distribution device of described hot gas conducting to the coal seam, and the gas extractor that is communicated with described air outlet; Described gas collection distribution device in order to the hot gas conducting that will feed by described inlet mouth to the coal seam, and will be through the gas conducting of heat exchange described air outlet extremely.
In technique scheme, described air outlet is arranged at the top of described inlet mouth.
In technique scheme, described inlet mouth and described air outlet all are arranged at the bottom of described coal hopper.
In technique scheme, described inlet mouth and described air outlet all are arranged at below 1/3rd of height on the vertical direction of described coal hopper.
In technique scheme, described distribution device is the metal tube of a plurality of bottom-open of being communicated with described inlet mouth of an end.
In technique scheme, described gas extractor is the metal tube of a plurality of bottom-open of being communicated with described air outlet of an end.
In technique scheme, the obtaining by folding forming of the metal tube of described a plurality of bottom-open for sheet metal.
In technique scheme, described inlet mouth links to each other with useless flue, and the useless flue gas that produces in the destructive distillation treating processes is carried out in described useless flue conducting to coal cinder.
Technique scheme of the present utility model has the following advantages compared to existing technology:
Preheating structure of the present utility model utilizes the useless flue gas that produces in the retort process in coal bunker brown coal to be carried out preheating, it utilizes the useless flue gas in the retort process that feed coal is carried out preliminary preheating, the initial temperature that improves coal removes the outer water of part simultaneously, thermal load when said process had both reduced the brown coal destructive distillation, also reclaimed heat, improved heat utilization efficiency, thereby the type of furnace output of unit surface is improved greatly.
Preheating structure of the present utility model is reserved enough height on coal bunker top, guarantee that the certain thickness in coal seam makes its effect of playing sealing, prevents that gas from running out of from the coal bunker top.In the middle and lower part of coal bunker, the gas distribution of arranging multiplayer and gas extractor utilize the useless flue gas that produces in the low-temperature pyrolysis process that feed coal is carried out preliminary preheating and drying.Useless flue gas enters coal bunker from the bottom, through deriving coal bunker by airway behind the certain thickness coal seam.And,, adopt the mode of a plurality of hoppers blanking simultaneously in order to improve the cloth evenness of coal in the coal bunker bottom.Because gaseous heat-carrier is the useless flue gas that comes out from cooling section, temperature can be too not high, so coal bunker and interior arrangement all adopt plain carbon stool to get final product, need not exotic materials or flame-proof thermal insulation material, and cost is lower.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, according to specific embodiment of the utility model also in conjunction with the accompanying drawings, the utility model is described in further detail below, wherein:
Fig. 1 is the main TV structure synoptic diagram of a kind of embodiment of preheating structure of the present utility model;
Fig. 2 is the side-looking structural representation of embodiment shown in Figure 1;
Reference numeral is expressed as: the 1-coal hopper, and the 2-feed opening, the 3-inlet mouth, the 4-air outlet, the 6-coal inlet,
The 7-distribution device, the 8-gas extractor.
Embodiment
Fig. 1 and Fig. 2 have shown a kind of embodiment of preheating structure of the present utility model, and a kind of preheating structure that is used for the hydrogenous coal low-temperature pyrolysis comprises: coal hopper 1, at least one inlet mouth 3, at least one air outlet 4 and gas collection distribution device.Described coal hopper 1 upper end is provided with coal inlet 6, and described coal hopper 1 lower end is provided with at least one feed opening 2 to be suitable for the coal cinder derivation through thermal pretreatment.Described inlet mouth 3 is in order to feed hot gas so that coal cinder is carried out preheating.Described air outlet 4 will be in order to deriving described preheating structure through the gas of heat exchange.Described gas collection distribution device is arranged at the bottom of described coal hopper 1, and this gas collection distribution device comprises: be communicated with described inlet mouth 3, with the distribution device 7 of described hot gas conducting to the coal seam, and the gas extractor 8 that is communicated with described air outlet 4; Described gas collection distribution device in order to the hot gas conducting that will feed by described inlet mouth 3 to the coal seam, and will be through the gas conducting of heat exchange described air outlet 4 extremely.Described air outlet 4 is arranged at the top of described inlet mouth 3.Described inlet mouth 3 and described air outlet 4 all are arranged at the bottom of described coal hopper 1.Described inlet mouth 3 and described air outlet 4 all are arranged at below 1/3rd of height on the vertical direction of described coal hopper 1.Described distribution device 7 is the metal tube of a plurality of bottom-open of being communicated with described inlet mouth 3 of an end.Described gas extractor 8 is the metal tube of a plurality of bottom-open of being communicated with described air outlet 4 of an end.Described inlet mouth 3 links to each other with useless flue, and the useless flue gas that produces in the destructive distillation treating processes is carried out in described useless flue conducting to coal cinder.Obtaining by folding forming for sheet metal of the metal tube of described a plurality of bottom-open, the tinsel that concrete originally is among the embodiment is a carbon steel coupon.Described gas extractor 8 and described distribution device 7 all are that the support that utilizes the carbon steel coupon after folding that the coal seam is played to a certain degree utilizes the open architecture of carbon steel coupon bottom, folding back to carry out gas collection and gas distribution simultaneously.Thereby make the preheating structure underlying seam have certain space, must be beneficial to useless flow of flue gas.
Used the external combustion internally heated coal carbonization furnace of present embodiment preheating structure, it is followed successively by from top to bottom: preheating section, dryer section, retort section and cooling section.Described preheating section is arranged on described dryer section top, is communicated with described dryer section, is used for feed coal is carried out thermal pretreatment; Described dryer section is used for feed coal is carried out drying treatment, and obtains cold flue gas simultaneously; Described retort section is used for that the feed coal through drying treatment is carried out destructive distillation and handles, and feed coal is handled the back through destructive distillation and formed semicoke; Described cooling section is to come the semicoke of output is wherein carried out cooling process by feeding described cold flue gas, and obtains hot flue gas simultaneously.Described coal carbonization furnace also is provided with described cold flue gas conducting that described dryer section the is produced cold flue gas pipeline to described cooling section, and the described hot flue gas conducting that described cooling section is produced is to the exhaust pipe of described preheating section.The recirculation blower that is connected with on the described cold flue gas pipeline, its described cold flue gas that can make the generation in the described dryer section via the conducting of described cold flue gas pipeline to described cooling section, afterwards again via described exhaust pipe conducting to described preheating section.Described cold flue gas pipeline is connected with the emptying passage with the unwanted unnecessary described cold flue gas emptying of described cooling section.In the raw gas exit of described retort section also is connected with described retort section, feed coal is carried out producing when destructive distillation is handled the after-treatment system that raw gas removes coal tar.Between the exhanst gas outlet of described after-treatment system and described dryer section, also be connected with the drying and burning device, between the exhanst gas outlet of described cold flue gas pipeline and described drying and burning device, also be connected drying duct.Described drying and burning device burns the part coal gas that produces in the described after-treatment system, be used for the dry flue gas of the drying treatment of described dryer section with generation, and described drying duct can mix the part cold flue gas that produces in the described dryer section to regulate the temperature of drying treatment in the described dryer section with described dry flue gas.In addition, between the exhanst gas outlet of described after-treatment system and described retort section, also be connected with the destructive distillation burner, between the exhanst gas outlet of the exhanst gas outlet of described after-treatment system and described destructive distillation burner, also be connected with the destructive distillation pipeline.Described destructive distillation burner can burn the part coal gas that produces in the described after-treatment system, be used for the destructive distillation flue gas that the destructive distillation of described retort section is handled with generation, and described destructive distillation pipeline can mix the part coal gas that produces in the described after-treatment system to regulate the temperature of the destructive distillation processing in the described retort section with described destructive distillation flue gas mutually.The smoke inlet place of described drying and burning device and described destructive distillation burner also is connected with the combustion air blower fan that combustion air is provided respectively in described drying and burning device and described destructive distillation burner.
Using preheating structure of the present utility model to the working process that coal cinder carries out thermal pretreatment is: add coal cinder in this preheating structure, in order to carrying out thermal pretreatment; The useless flue gas conducting that utilization produces in retort process to inlet mouth 3 imports this preheating structure, above-mentioned useless flue gas is disseminated in the coal seam along distribution device 7, described useless flue gas rises in the coal seam and moisture more coal cinder carries out heat exchange, and thermal pretreatment is carried out in the coal seam.Advanced that useless flue gas after the heat exchange is collected by gas extractor 8 and conducting to the air outlet 4, be expelled in the atmosphere.Preheating structure of the present utility model utilizes the useless flue gas that produces in the retort process in coal bunker brown coal to be carried out preheating, it utilizes the useless flue gas in the retort process that feed coal is carried out preliminary preheating, the initial temperature that improves coal removes the outer water of part simultaneously, thermal load when said process had both reduced the brown coal destructive distillation, also reclaimed heat, improved heat utilization efficiency, thereby the type of furnace output of unit surface is improved greatly.
Preheating structure of the present utility model is reserved enough height on coal bunker top, guarantee that the certain thickness in coal seam makes its effect of playing sealing, prevents that gas from running out of from the coal bunker top.In the middle and lower part of coal bunker, the gas distribution of arranging multiplayer and gas extractor utilize the useless flue gas that produces in the low-temperature pyrolysis process that feed coal is carried out preliminary preheating and drying.Useless flue gas enters coal bunker from the bottom, through deriving coal bunker by airway behind the certain thickness coal seam.And,, adopt the mode of a plurality of hoppers blanking simultaneously in order to improve the cloth evenness of coal in the coal bunker bottom.Because gaseous heat-carrier is the useless flue gas that comes out from cooling section, temperature can be too not high, so coal bunker and interior arrangement all adopt plain carbon stool to get final product, need not exotic materials or flame-proof thermal insulation material, and cost is lower.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being extended out thus or change still are among the protection domain of the invention.
Claims (8)
1. a preheating structure that is used for the hydrogenous coal low-temperature pyrolysis is characterized in that, comprising:
Coal hopper (1), described coal hopper (1) upper end is provided with coal inlet (6), and described coal hopper (1) lower end is provided with at least one feed opening (2) to be suitable for the coal cinder derivation through thermal pretreatment;
At least one inlet mouth (3), it is in order to feed hot gas so that coal cinder is carried out preheating;
At least one air outlet (4), it will be in order to deriving described preheating structure through the gas of heat exchange;
The gas collection distribution device, it is arranged at the bottom of described coal hopper (1), described gas collection distribution device comprises: is communicated with described inlet mouth (3), and with the distribution device (7) of described hot gas conducting to the coal seam, and the gas extractor (8) that is communicated with described air outlet (4); Described gas collection distribution device in order to the hot gas conducting that will feed by described inlet mouth (3) to the coal seam, and will be through the gas conducting of heat exchange described air outlet (4) extremely.
2. preheating structure according to claim 1 is characterized in that, described air outlet (4) are arranged at the top of described inlet mouth (3).
3. preheating structure according to claim 1 is characterized in that, described inlet mouth (3) and described air outlet (4) all are arranged at the bottom of described coal hopper (1).
4. preheating structure according to claim 3 is characterized in that, described inlet mouth (3) and described air outlet (4) all are arranged at below 1/3rd of height on the vertical direction of described coal hopper (1).
5. preheating structure according to claim 1 is characterized in that, described distribution device (7) is the metal tube of a plurality of bottom-open of being communicated with described inlet mouth (3) of an end.
6. preheating structure according to claim 1 is characterized in that, described gas extractor (8) is the metal tube of a plurality of bottom-open of being communicated with described air outlet (4) of an end.
7. according to claim 5 or 6 described preheating structures, it is characterized in that the obtaining by folding forming of the metal tube of described a plurality of bottom-open for sheet metal.
8. according to the arbitrary described preheating structure of claim 1 to 6, it is characterized in that described inlet mouth (3) links to each other with useless flue, the useless flue gas that produces in the destructive distillation treating processes is carried out in described useless flue conducting to coal cinder.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201743114U CN201581051U (en) | 2009-12-04 | 2009-12-04 | Preheating structure for low-temperature dry distillation of coal with high water content |
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| CN2009201743114U CN201581051U (en) | 2009-12-04 | 2009-12-04 | Preheating structure for low-temperature dry distillation of coal with high water content |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994132A (en) * | 2011-12-21 | 2013-03-27 | 山西鑫立能源科技有限公司 | Dehydrating device of coal as fired for coal pyrolysis furnace |
| CN107513396A (en) * | 2017-08-31 | 2017-12-26 | 榆林煤化工产业促进中心 | A kind of fine coal drying oven dried based on packed bed and drying device and technique based on the drying oven |
-
2009
- 2009-12-04 CN CN2009201743114U patent/CN201581051U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994132A (en) * | 2011-12-21 | 2013-03-27 | 山西鑫立能源科技有限公司 | Dehydrating device of coal as fired for coal pyrolysis furnace |
| CN102994132B (en) * | 2011-12-21 | 2014-07-02 | 山西鑫立能源科技有限公司 | Dehydrating device of coal as fired for coal pyrolysis furnace |
| CN107513396A (en) * | 2017-08-31 | 2017-12-26 | 榆林煤化工产业促进中心 | A kind of fine coal drying oven dried based on packed bed and drying device and technique based on the drying oven |
| CN107513396B (en) * | 2017-08-31 | 2024-05-07 | 榆林煤化工产业促进中心 | Pulverized coal drying furnace based on packed bed drying and drying device and process based on drying furnace |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Xilinhaote National Energy Drying Co., Ltd. Assignor: Beijing China Energy Huayuan Investment Co., Ltd.|Beijing Guodian Fortis Technology Development Co., Ltd. Contract record no.: 2010990000776 Denomination of utility model: Preheating structure for low-temperature dry distillation of coal with high water content Granted publication date: 20100915 License type: Exclusive License Record date: 20100920 |
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| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Xilinhot National Energy Technology Co., Ltd. Assignor: Beijing China Energy Huayuan Investment Co., Ltd.|Beijing Guodian Fortis Technology Development Co., Ltd. Contract record no.: 2010990000776 Date of cancellation: 20121219 |
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| EM01 | Change of recordation of patent licensing contract |
Change date: 20121219 Contract record no.: 2010990000776 Assignee after: Xilinhot National Energy Technology Co., Ltd. Assignee before: Xilinhaote National Energy Drying Co., Ltd. |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100915 Termination date: 20181204 |
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| CF01 | Termination of patent right due to non-payment of annual fee |