CN205635481U - Low order fine coal pyrolysis system - Google Patents

Abstract

The utility model provides a low order fine coal pyrolysis system, this low order fine coal pyrolysis system includes: dry riser, a cyclone, first feed screw and pyrolytic reaction ware. This pyrolysis system is suitable for processing fine coal, need not adopt gaseous heat carrier, and pyrolysis oil gas resource derives fast, and two secondary response essay matter in the tar are high, and it is high that pyrolysis gas is diluted the calorific value, can effectively reduce a pyrolysis oven pyrolysis oil gas dustiness, and can reduce the thermal insulation of pipeline between pyrolytic reaction ware to the pyrolysis oil gas rapid condensation device.

Description

Low order pulverized coal pyrolysis system

Technical field

This utility model relates to chemical field, in particular it relates to low order pulverized coal pyrolysis system.

Background technology

The energy resource structure feature of China is rich coal, gas oil-poor, few, as coal production maximum in the world and country of consumption, In one considerably long period, the status that coal resources dominate the energy as China is unshakable.According to statistics, China is Verifying coal reserves is 114,500,000,000 tons, and wherein middle low-order coal (brown coal, lower-grade metamorphic bituminous) accounts for again whole nation reserves About 55.15%.Owing to low-order coal has moisture height, easy-weathering nature, is difficult to sort, should not transport for long-distance and store Etc. feature so that its comprehensive utilization is very limited.Wherein directly combustion power generation is one of its modal Land use systems, According to incompletely statistics, there are the brown coal of more than 90% in China for station boiler and various Industrial Boiler.Low-order coal is as thermal coal Fuel directly burns, and not only wastes the hydrocarbon rich resource contained in coal, and efficiency is low.By low-temperature pyrolysis of coal with Coal-char combustion, gasification decoupling, it is achieved low-order coal classification high-efficiency cleaning trans-utilization, is the Main way of present large-scale Coal Chemical Industry.

It is widely used along with modernization coal mining is polytechnic so that the ratio of lump coal declines (40% decline 10～20% by current), Fine coal productivity raises (being risen to 80～90% by current 60%).There is easy airborne dust, inflammable, explosive in fine coal, comprehensive utilization The problems such as difficulty is big, pyrolysis of coal technology is considered as the maximally efficient approach of coal high-efficiency clean utilization.

The most conventional pyrolysis of coal technology has Toscoal hot solid carrier devolatilization technique, Germany's Lurgi-Spuelgas low temperature pyrogenation Technique, god mansion SH type internal thermal upright carbonization furnace technique etc., but all there is certain defect.Toscoal hot solid carrier devolatilization In technique, Ceramic Balls is in cyclic process, during there is mechanical wear, and airlift conveying Ceramic Balls, to pipeline Having a certain degree of abrasion with equipment inner wall, pyrolysis reactor uses rotary kiln, and the oil gas time of staying that pyrolysis produces is long, oil Gas secondary response is violent, and tar quality declines, and after pyrolysis, semicoke and Ceramic Balls are completely separated difficulty.Germany Lurgi-Spuelgas Low temperature pyrogenation technique and god mansion SH type internal thermal upright carbonization furnace technique are suitable for processing lump coal, are not suitable for pulverized coal pyrolysis, adopt With gas heat carrier, the pyrolysis petroleum resources produced after pyrolysis is diluted by gas heat carrier, and calorific value is low, and pyrolysis petroleum resources is cold Solidifying amount is big, and lump coal volume is big, and heat transfer coefficient is low, and heat transfer efficiency is the highest, and pyrolysis time is long, and oil gas secondary response is violent, burnt Oil quality is the highest, and equipment is huge, is difficult to operation.

Thus, current pyrolytic process of coal still haves much room for improvement.

Utility model content

One of technical problem that this utility model is intended to solve in correlation technique the most to a certain extent.To this end, this practicality is new One purpose of type is that proposing one is suitable to process fine coal, is not required to use gas heat carrier, pyrolysis gas not to be diluted calorific value high, Pyrolysis petroleum resources is quickly derived, and the little quality of tar secondary reaction is high, can effectively reduce the pyrolysis oil gas pyrolysis reactor Dustiness or pyrolysis reactor can be reduced to the low order powder of lagging facility of pipeline between pyrolysis oil gas rapid condensation device Pyrolysis of coal system and method for pyrolysis.

At an aspect of the present utility model, this utility model provides a kind of low order pulverized coal pyrolysis system.New according to this practicality The embodiment of type, low order pulverized coal pyrolysis system includes:

Being dried riser, described dry riser is provided with feed(raw material)inlet, smoke inlet and mixed material outlet, wherein, institute Stating feed(raw material)inlet to be positioned on the sidewall of described dry riser bottom, described smoke inlet is positioned at the bottom of described dry riser, The outlet of described mixed material is positioned on the sidewall on described dry riser top；

First cyclone separator, described first cyclone separator has the first gas-solid mixture entrance, the first gas outlet and One solid outlet, described first gas-solid mixture entrance and described mixed material outlet；

First feed screw, described first feed screw is connected with described first solid outlet；

Pyrolysis reactor, described pyrolysis reactor is provided with pyrolysis material entrance, gas mixture outlet and semicoke outlet, described Pyrolysis reactor is internally provided with many oil gas and derives pipelines, gas gathering manifold, many gas-collecting branch pipes, heat accumulation type radiant tube and the Two cyclone separator,

Wherein, described pyrolysis material entrance is connected with described first feed screw,

Described gas gathering manifold is arranged on the central shaft of described pyrolysis reactor,

One end of described gas-collecting branch pipe is connected with described gas gathering manifold, and the other end is communicated to described oil gas and derives pipeline；

Described second cyclone separator has the second gas-solid mixture entrance, the second gas outlet and the second solid outlet, wherein, The outlet of described second gas outlet and described gas mixture is connected, and the end of described gas gathering manifold extends and is communicated to described the Second gas-solid mixture entrance of two cyclone separator；

Described heat accumulation type radiant tube is along the short transverse multi-tier arrangement of described pyrolysis reactor, and every layer has many in level side Heat accumulation type radiant tube the most parallel to each other.

Whirlwind is divided by the low order pulverized coal pyrolysis system (being the most sometimes called for short " pyrolysis system ") according to this utility model embodiment It is arranged at inside pyrolysis reactor from device, can not only effectively reduce the containing of pyrolysis of coal gas mixture discharging pyrolysis reactor Dust quantity, effectively suppression are discharged the pyrolysis oil gas of pyrolysis reactor and are mixed dust condensation blocking subsequent pipeline and relevant device；Meanwhile, In the built-in pyrolysis reactor of cyclone separator, it is also possible to reduce pyrolysis reactor to pyrolysis oil gas mixture rapid condensation device it Between the lagging facility of pipeline, reduce the thermal insulation area of equipment and reduce system heat tracing energy consumption；It addition, this pyrolysis system is by oil Gas mixture is quickly derived pyrolysis reactor by gas delivery line, can effectively suppress oil gas second pyrolysis, improves pyrolysis oil yield, And by using heat accumulation type radiant tube heating technique, it is not necessary to gas, solid heat carrier heating, such that it is able to improve the heat of reactor Efficiency, it addition, use the pyrolysis system of this utility model above-described embodiment without complicated machinery, the spirit of inside reactor each point temperature Live adjustable, there is the features such as technological process is simple, it is simple to large-scale industrial production.

Optionally, described gas-collecting branch pipe is arranged parallel to each other along the length direction of described gas gathering manifold.

Optionally, described gas-collecting branch pipe is perpendicular to described gas collecting main pipe.

Optionally, described oil gas derives pipeline along the short transverse multi-tier arrangement of described pyrolysis reactor, every layer have many Oil gas parallel to each other in horizontal direction derives pipeline.

Optionally, described oil gas is derived pipeline and is arranged in parallel with described heat accumulation type radiant tube, and described heat accumulation type radiant tube is each The left and right sides be symmetrically arranged with two oil gas and derive pipelines.

Optionally, described oil gas derivation pipeline is that described oil gas is led with the spacing of the tube wall of neighbouring described heat accumulation type radiant tube Go out 1/2-3 times of pipe diameter d.

Optionally, described oil gas is derived and is provided with multiple through hole on the tube wall of pipeline, it is preferable that described through hole is at described oil gas Derive and be uniformly distributed on the length direction of pipeline.

Optionally, oil gas described in same layer is derived pipeline and is communicated to same described gas-collecting branch pipe.

Optionally, it is welded with support between outer wall and the described heat accumulation type radiant tube being adjacent of described second cyclone separator Bar, with fixing described second cyclone separator.

Optionally, this pyrolysis system may further include: breaker；Second feed screw, described second spiral send Material machine is connected with described breaker；Coal bunker, described coal bunker is connected with described second feed screw；3rd spiral send Material machine, described 3rd feed screw is connected with the feed(raw material)inlet of described coal bunker and described dry riser.

Additional aspect of the present utility model and advantage will part be given in the following description, and part will become from the following description Obtain substantially, or recognized by practice of the present utility model.

Accompanying drawing explanation

Fig. 1 is the structural representation of the pyrolysis system according to one embodiment of this utility model.

Fig. 2 is the part-structure schematic diagram of the pyrolysis system according to another embodiment of this utility model.

Fig. 3 is the structural representation of the pyrolysis system according to another embodiment of the present utility model.

Fig. 4 is the schematic flow sheet of the method for pyrolysis according to one embodiment of this utility model.

Detailed description of the invention

Embodiment of the present utility model is described below in detail.The embodiments described below is exemplary, is only used for explaining this reality With novel, and it is not intended that to restriction of the present utility model.Unreceipted concrete technology or condition in embodiment, according to this The technology described by document or condition in field or carry out according to product description.Agents useful for same or the unreceipted production of instrument Manufacturer person, be can by city available from conventional products.

In description of the present utility model, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width Degree ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", Orientation or the position relationship of the instruction such as " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", " circumferential " are based on accompanying drawing Shown orientation or position relationship, be for only for ease of description this utility model and simplify description rather than instruction or hint institute The device that refers to or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this reality With novel restriction.

In this utility model, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " Should be interpreted broadly Deng term, connect for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be It is mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two The connection of individual element internal or the interaction relationship of two elements, unless otherwise clear and definite restriction.Common for this area For technical staff, above-mentioned term concrete meaning in this utility model can be understood as the case may be.

In this utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score permissible It is that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature Second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be first Feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.

At an aspect of the present utility model, this utility model provides a kind of low order pulverized coal pyrolysis system.Below with reference to Fig. 1-3 Low order pulverized coal pyrolysis system according to this utility model embodiment is described in detail.According to embodiment of the present utility model, Low order pulverized coal pyrolysis system includes: be dried riser the 100, first cyclone separator the 200, first feed screw 300 and Pyrolysis reactor 400.

According to specific embodiment of the utility model, it is dried riser 100 and is provided with feed(raw material)inlet 110, smoke inlet 120 130 are exported with mixed material.Feed(raw material)inlet 110 is positioned on the sidewall of dry riser 100 bottom and is suitable to dry lifting Feeding pulverized coal raw material in pipe 100, smoke inlet 120 is positioned at the bottom of dry riser 100 and is suitable to dry riser 100 Middle supply heat smoke, mixed material outlet 130 be positioned on the sidewall on dry riser 100 top and be suitable to by through being dried with The fine coal raw material of preheating is discharged and is dried riser 100.In dry riser 100, fine coal raw material is under the effect of heat smoke Moving from the bottom to top, be dried and the pre-heat treatment simultaneously, the flue gas obtained and the mixture of coal export 130 by mixed material Discharge.Supply is to the flue gas that the flue gas being dried in riser 100 can be that in heat accumulation type radiant tube, fuel combustion produces, thus, Resource circulation utilization can be realized, reduce energy consumption, good economy performance.

According to specific embodiment of the utility model, the first cyclone separator 200 have the first gas-solid mixture entrance 210, First gas outlet 220 and the first solid outlet 230, described first gas-solid mixture entrance 210 goes out with described mixed material Mouth 130 is connected.First cyclone separator 200 is suitable to through being dried flue gas and the mixture of coal that riser 100 obtains Separating, specifically, the mixture of flue gas and coal enters the first cyclonic separation by the first gas-solid mixture entrance 210 Device, the flue gas obtained through gas solid separation discharges through the first gas outlet 220, and the pyrolysis material (i.e. fine coal) of isolated is through One solid outlet 230 is discharged, and enters subsequent processing.In some embodiments, in order to reach more preferable separating effect, the first rotation Wind separator 200 can be two or more, and in this case, multiple first cyclone separator 200 are one another in series, figure The situation that the first cyclone separator 200 is two is shown in 1.

According to specific embodiment of the utility model, the first feed screw 300 goes out with the first solid of the first cyclone separator Mouth 230 is connected, and the pyrolysis material discharged through the first solid outlet 230 is extremely pyrolyzed instead by the first feed screw 300 supply Answer and device 400 carries out pyrolytic reaction.

According to specific embodiment of the utility model, pyrolysis reactor 400 is provided with pyrolysis material entrance 410, air-fuel mixture Thing outlet 420, semicoke outlet 430, and this pyrolysis reactor 400 are internally provided with many oil gas is derived pipeline 440, gas collection House steward 451, many gas-collecting branch pipes 452, heat accumulation type radiant tube 460 and the second cyclone separator 470.

According to specific embodiment of the utility model, pyrolysis material entrance 410 is arranged at the top of pyrolysis reactor 400, is suitable to By in pyrolysis material supply to reactor.

According to specific embodiment of the utility model, gas mixture outlet 420 is arranged at the top of pyrolysis reactor 400, And and pyrolysis material entrance 410 interval setting, the gas mixture being suitable to obtain pyrolysis discharges pyrolysis reactor 400.

According to specific embodiment of the utility model, semicoke outlet 430 is arranged at the bottom of pyrolysis reactor 400, and is suitable to Pyrogenous origin semicoke is discharged pyrolysis reactor 400.

According to specific embodiment of the utility model, heat accumulation type radiant tube 460 in the inside of pyrolysis reactor 400 along pyrolysis The short transverse multi-tier arrangement of reactor, every layer has many heat accumulation type radiant tubes the most parallel to each other.According to Specific embodiment of the utility model, every layer of heat accumulation type radiant tube includes multiple parallel and equally distributed heat accumulation type radiant tube And each heat accumulation type radiant tube is parallel with each heat accumulation type radiant tube in adjacent upper and lower two-layer heat accumulation type radiant tube.According to this The concrete example of utility model, heat accumulation type radiant tube can be the circle of DN200～300mm or semicircle radial canal.Thus, The pyrolysis efficiency of pyrolysis material can be significantly improved, and then improve pyrolysis oil yield.

According to specific embodiment of the utility model, adjacent heat accumulation type radiant tube left and right center distance can be 300～500mm, Adjacent heat accumulation type radiant tube vertical centre spacing can be 400～800mm.It is to be understood that adjacent heat accumulation type radiant tube is left Right center distance can be understood as on same layer in heat accumulation type radiant tube distance in the heart, and during adjacent heat accumulation type radiant tube is vertical Distance in the heart in the adjacent heat accumulation type radiant tube that can be understood as adjacent upper and lower two interlayers in the heart.

According to specific embodiment of the utility model, the number of plies of multilamellar heat accumulation type radiant tube can be 10-30 layer.Invention Crinis Carbonisatus Existing, this kind of structure is arranged so that reactor temperature field distribution is uniform, such that it is able to significantly improve the pyrolysis efficiency of material, And then improve the yield of pyrolysis oil.

According to specific embodiment of the utility model, heat accumulation type radiant tube can be unidirectional, gas heat-accumulated type radial canal, the most logical Cross the heat that combustion gas produces by heat accumulation type radiant tube body and carry out heat supply in the way of radiation.According to tool of the present utility model Body embodiment, heat accumulation type radiant tube can be provided with gas control valve (not shown).Thus, it is possible to fired by adjustment The flow of the combustion gas that controlled atmosphere joint valve regulation is passed through heat accumulation type radiant tube realizes the accurate temperature controlling to pyrolytic process, such that it is able to aobvious Write the pyrolysis efficiency improving material, and then improve the yield of pyrolysis oil.

Concrete, the flow etc. that can be passed through the combustion gas of heat accumulation type radiant tube by adjustment realizes the accurate temperature controlling to pyrolytic process, And heat accumulation type radiant tube uses the combustion system of periodically commutation so that the temperature field of single heat accumulation type radiant tube be more or less the same in 30 DEG C, and the every independent temperature control of heat accumulation type radiant tube, thus ensure the uniformity of reactor temperature field, such as by adjusting The flow of the combustion gas being passed through heat accumulation type radiant tube makes pyrolysis reactor be divided into three districts, i.e. drying and dehydrating district, heat from top to bottom Solve reaction zone, semicoke maturation zone, can be by the temperature range in the control realization drying and dehydrating district of heat accumulation type radiant tube be existed 680-730 degree Celsius, it is possible to quickly slough the moisture contained by pyrolysis material, drying and dehydrating district temperature is slightly higher simultaneously, can subtract Few drying and dehydrating section length.Pyrolysis reaction region temperature range can control at 500-650 degree Celsius, to ensure the abundant of material Pyrolysis, semicoke maturation zone temperature can control at 500-600 degree Celsius, thus a heating part is pyrolyzed the most completely further Material.

According to specific embodiment of the utility model, gas gathering manifold 451 is arranged on the central shaft of described pyrolysis reactor 400, One end of gas-collecting branch pipe 452 is connected with described gas gathering manifold 451, and the other end is communicated to described oil gas and derives pipeline 440. The concrete set-up mode of gas-collecting branch pipe 452 is not particularly limited, such as, include but not limited to the length side along gas gathering manifold 451 It is arranged in parallel to each other.According to embodiment of the present utility model, can have between gas-collecting branch pipe 452 and gas gathering manifold 451 Certain angle, in some concrete examples, gas-collecting branch pipe 452 is perpendicular to gas collecting main pipe 451 and arranges.Thus, beneficially oil gas The quick derivation of mixture.

According to specific embodiment of the utility model, oil gas is derived pipeline 440 and is connected with one end of gas-collecting branch pipe 452, and And it is provided with through hole on the tube wall of oil gas delivery line.Thus, by arranging oil gas derivation pipeline so that pyrolytic process produces Pyrolysis oil gas quickly derive, thus effectively suppression oil gas second pyrolysis, improve pyrolysis oil yield.According to of the present utility model Embodiment, the quantity of through hole is not particularly limited, and in some concrete examples, oil gas is derived and arranged on the tube wall of pipeline 440 There is multiple through hole, it is preferable that the plurality of through hole is derived at oil gas and is uniformly distributed on the length direction of pipeline 440.Thus, have It is beneficial to gas mixture quickly derive.

According to specific embodiment of the utility model, oil gas derives the pipeline 440 short transverse multilamellar along pyrolysis reactor 400 Arranging, every layer has many oil gas the most parallel to each other and derives pipeline.

According to specific embodiment of the utility model, oil gas is derived pipeline 440 and is arranged in parallel with heat accumulation type radiant tube 460, and The left and right sides of heat accumulation type radiant tube 460 is symmetrically arranged with two oil gas and derives pipeline 440.Inventor finds, by often Root heat accumulation type radiant tube both sides are installed oil gas and are derived pipeline, and the gas mixture that pyrolysis produces is derived rapidly by deriving pipeline, Thus restrained effectively the second pyrolysis of oil gas, and then improve the yield of pyrolysis oil, good in economic efficiency.

According to specific embodiment of the utility model, radiate as in figure 2 it is shown, oil gas derives pipeline 440 with neighbouring heat accumulating type Spacing L of the tube wall of pipe 460 is 1/2-3 times that oil gas derives pipe diameter d.Thus can derive the heat of generation at once Solve gas mixture, it is to avoid pyrolysis oil cracks, improve pyrolysis oil productivity.

According to specific embodiment of the utility model, same layer oil gas is derived pipeline 440 and is communicated to same gas-collecting branch pipe 452. Thereby, it is possible to gas mixture is concentrated, is derived rapidly.

According to specific embodiment of the utility model, the second cyclone separator 470 have the second gas-solid mixture entrance 471, Second gas outlet 473 and the second solid outlet 472, wherein, the second gas outlet 473 exports 420 with gas mixture Being connected, the end of gas gathering manifold 451 extends the second gas-solid mixture entrance 471 being communicated to this second cyclone separator 470. Inventor finds, by arranging cyclone separator inside pyrolysis reactor, thermal decomposition product is carried out gas solid separation process, energy Enough dustiness effectively reducing the gas mixture discharging pyrolysis reactor, effectively suppress the pyrolysis oil gas pyrolysis reactor to mix Dust condensation blocking subsequent pipeline and relevant device；Meanwhile, in the built-in pyrolysis reactor of cyclone separator, pyrolysis can be reduced Reactor, to the lagging facility of pipeline between gas mixture condensing unit, reduces the thermal insulation area of equipment and reduces system heat tracing Energy consumption.

According to specific embodiment of the utility model, the outer wall of the second cyclone separator 470 and the heat accumulating type radiation being adjacent It is welded with support bar 480 between pipe 460, it is possible to be firmly fixed to inside pyrolysis reactor this cyclone separator. Generally, the second cyclone separator 470 is arranged at the top of pyrolysis reactor 400, therefore, it can at the second cyclone separator Support bar 480 is welded between 470 outer walls and ground floor heat accumulation type radiant tube.

According to specific embodiment of the utility model, pyrolysis reactor 400 is additionally provided with simultaneously heat accumulation type radiant tube burning institute Need fuel, air and burning after smoke entrance, fuel gas inlet and air intake respectively with heat accumulation type radiant tube 460 phase Even, burn in heat accumulation type radiant tube the pre-heat smoke that produces through with air heat-exchange after, be cooled to 90-150 degree Celsius, low Temperature flue gas can smoke inlet 120 supply of drying riser 100 to being dried in riser 100, for raw material is done Dry and the pre-heat treatment, further increases pyrolysis reactor efficiency and efficiency of combustion.

According to specific embodiment of the utility model, the height of pyrolysis reactor 400 and width are preferably suitable, and width can be 2-6 Rice, highly can control by controlling the quantity and spacing of every layer of heat accumulation type radiant tube, and the height of usual pyrolysis reactor is permissible It is 5～20m.Thus, it is possible to realize the pyrolysis completely to material.

According to specific embodiment of the utility model, with reference to Fig. 3, pyrolysis system of the present utility model can further include: Breaker the 500, second feed screw 600, coal bunker 700 and the 3rd feed screw 800.

According to specific embodiment of the utility model, breaker 500 is for being crushed to 1-3 millimeter by the particle diameter of feed coal. Thus, the fine coal raw material obtained is heated evenly in pyrolysis reactor 400, is conducive to improving efficiency and the pyrolysis of pyrolytic reaction Oil yield.

According to specific embodiment of the utility model, the second feed screw 600 is connected with breaker 500, and being used for will The broken fine coal raw material obtained supplies to coal bunker 700.

According to specific embodiment of the utility model, coal bunker 700 is connected with the second feed screw 600, is suitable to store powder Coal raw material.

According to specific embodiment of the utility model, described 3rd feed screw 800 and coal bunker 700 and dry riser 100 Feed(raw material)inlet 110 be connected, the fine coal raw material supply being suitable to be stored in coal bunker 700 is to being dried in riser 100.

In another aspect of the present utility model, this utility model provides and utilizes foregoing low order pulverized coal pyrolysis system to carry out The method of low order pulverized coal pyrolysis.According to embodiment of the present utility model, with reference to Fig. 4, low order pulverized coal pyrolysis method include with Lower step:

S100: the supply of low order fine coal is dried process to being dried riser, obtains the mixed material of flue gas and coal.

According to specific embodiment of the utility model, before carrying out step S100, breaker can be advanced with to raw material Coal carries out break process so that the particle diameter of broken pyrolysis material subsequently is 1-3 millimeter.Thus, pyrolysis is subject in pyrolysis reactor Uniformly, pyrolytic reaction efficiency is higher, and pyrolysis oil yield is higher for heat.

According to specific embodiment of the utility model, in this step, the heat accumulation type radiant tube in pyrolysis reactor is utilized to burn The flue gas produced is dried process to low order fine coal, while reducing feed coal water content, additionally it is possible to enter low order fine coal Row the pre-heat treatment, thus, further increases reactor efficiency and efficiency of combustion, it is achieved that resource circulation utilization, economy Good.

S200: utilize the first cyclone separator that the mixed material of flue gas and coal is carried out gas solid separation process, obtain flue gas and heat Solve material.

S300: utilize the first feed screw to be added in pyrolysis reactor by described pyrolysis material, and make described pyrolysis material carry out heat Solve reaction, obtain gas mixture and semicoke.

According to specific embodiment of the utility model, the temperature on pyrolysis reactor top is 680-730 degree Celsius, the temperature at middle part Degree is for 500-650 degree Celsius, and the temperature of bottom is 500-600 degree Celsius.Specifically, pyrolysis material in pyrolysis reactor by To lower motion, sequentially pass through drying and dehydrating district, top, pyrolysis reaction region, middle part and semicoke maturation zone, bottom, in drying and dehydrating district Moisture quickly sloughed by pyrolysis material, then carries out pyrolytic reaction in pyrolysis reaction region, obtains gas mixture and semicoke, and oil gas mixes Compound is derived pipeline by oil gas and is quickly derived, and collects through gas-collecting branch pipe, gas gathering manifold and supply to the second cyclone separator, Discharging pyrolysis reactor after removing dust, the semicoke obtained is continued to move downwardly into semicoke maturation zone, is then exported by semicoke Discharge pyrolysis reactor.

Inventor finds, utilizes the method, it is possible to pyrolysis low order fine coal fast and effectively, and utilizes foregoing pyrolysis system System implements the method, has whole feature and advantage of foregoing pyrolysis system, and this is no longer going to repeat them.

Referring to Fig. 3 and Fig. 4, to the low order pulverized coal pyrolysis system according to this utility model embodiment and low order pulverized coal pyrolysis The duty of method is described in detail, specific as follows:

The supply of low order fine coal is carried out break process to breaker 500, the granularity obtained at the fine coal of 1-3 millimeter through second Feed screw 600 supplies to coal bunker 700 storage, and the fine coal being stored in coal bunker 700 is at the 3rd feed screw 800 Effect under through feed(raw material)inlet 110 supply to being dried riser 100, simultaneously through smoke inlet 120 to dry riser 100 In be passed through flue gas, under the effect of flue gas, fine coal moves from the bottom to top, the blended material outlet of mixture of flue gas and fine coal 130 enter the first cyclone separator 200, and the gas after separation is discharged through the first gas outlet 220, the solid warp of isolated First solid outlet 230 enters the first feed screw 300, under the progradation of the first feed screw 300, is supplied Giving in pyrolysis reactor 400, heat accumulation type radiant tube 460 provides suitable temperature field for pyrolysis reactor 400 simultaneously, Pyrolysis reactor 400 is internal, and pyrolysis material from top to bottom moves, and sequentially passes through drying and dehydrating district, pyrolysis reaction region and semicoke Maturation zone, pyrolysis material generates gas mixture and semicoke through pyrolytic reaction, and wherein, gas mixture passes through oil gas delivery line The through hole in road 440 rapidly enters oil gas and derives pipeline, and sequentially enters gas-collecting branch pipe 452, the gas gathering manifold 451 communicated therewith, Then entering the second cyclone separator 470 by gas-solid mixture entrance 471, the solid obtained after gas solid separation passes through second Solid outlet 472 enters pyrolysis reactor, through semicoke outlet 430 discharge pyrolysis reactor together with semicoke, isolated Gas exports 420 discharge pyrolysis reactors through the second gas outlet 473 and gas mixture successively, enters subsequent treatment operation.

Below with reference to specific embodiment, this utility model is described, it should be noted that these embodiments are only It is illustrative, and limits this utility model never in any form.

Embodiment

Utilizing pyrolysis system of the present utility model that fine coal carries out pyrolysis processing, pyrolysis material and pyrolysis reactor parameters are as follows:

The Industrial Analysis of Yulin brown coal: Mad%, 6.75%, Vad%, 31.59%, Aad%, 5.41%, Fcad%, 56.25%, Coal crushes particle diameter 1～3mm.

Technological parameter: pyrolysis reactor upper temp 580 DEG C, middle portion temperature 605 DEG C, temperature of lower 594 DEG C, air-fuel mixture Thing outlet temperature 583 DEG C, cyclone separator gas outlet temperature 565 DEG C, pyrolysis reactor internal pressure 4.73Kpa, pyrolysis Gas mixture exports thin dirt removal efficiency 95%, exports dustiness 85mg/Kg.Pyrolysis oven uses the circle of DN250, spoke Penetrating pipe left and right center distance 300mm, vertical centre spacing is 450mm, and the radial canal number of plies is advisable at about 20 layers, reaction Device width is 4.5m, and height is 15m.

Pyrolysis tertiary industry distribution: tar 17.4%, pyrolysis gas 12.8%, semicoke 69.8%.

In description of the present utility model, term " first ", " second " be only used for describe purpose, and it is not intended that instruction or Hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, " first ", " second " are defined Feature can express or implicitly include one or more this feature.In description of the present utility model, " multiples' " It is meant that two or more, unless otherwise expressly limited specifically.

In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ", Or specific features, structure, material or the feature bag that the description of " some examples " etc. means to combine this embodiment or example describes It is contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be Any one or multiple embodiment or example combine in an appropriate manner.Additionally, in the case of the most conflicting, this area Technical staff the feature of the different embodiments described in this specification or example and different embodiment or example can be carried out In conjunction with and combination.

Although above it has been shown and described that embodiment of the present utility model, it is to be understood that above-described embodiment is example Property, it is impossible to being interpreted as restriction of the present utility model, those of ordinary skill in the art can in the range of this utility model Above-described embodiment be changed, revise, to replace and modification.

Claims (10)

1. a low order pulverized coal pyrolysis system, it is characterised in that including:

Being dried riser, described dry riser is provided with feed(raw material)inlet, smoke inlet and mixed material outlet, described raw material Entrance is positioned on the sidewall of described dry riser bottom, and described smoke inlet is positioned at the bottom of described dry riser, described Mixed material outlet is positioned on the sidewall on described dry riser top；

First cyclone separator, described first cyclone separator has the first gas-solid mixture entrance, the first gas outlet and One solid outlet, described first gas-solid mixture entrance and described mixed material outlet；

First feed screw, described first feed screw is connected with described first solid outlet；

Pyrolysis reactor, described pyrolysis reactor is provided with pyrolysis material entrance, gas mixture outlet and semicoke outlet, described Pyrolysis reactor is internally provided with many oil gas and derives pipelines, gas gathering manifold, many gas-collecting branch pipes, heat accumulation type radiant tube and the Two cyclone separator,

Wherein, described pyrolysis material entrance is connected with described first feed screw,

Described gas gathering manifold is arranged on the central shaft of described pyrolysis reactor,

One end of described gas-collecting branch pipe is connected with described gas gathering manifold, and the other end is communicated to described oil gas and derives pipeline；

Described second cyclone separator has the second gas-solid mixture entrance, the second gas outlet and the second solid outlet, wherein, The outlet of described second gas outlet and described gas mixture is connected, and the end of described gas gathering manifold extends and is communicated to described the Second gas-solid mixture entrance of two cyclone separator；

Described heat accumulation type radiant tube is along the short transverse multi-tier arrangement of described pyrolysis reactor, and every layer has many in level side Heat accumulation type radiant tube the most parallel to each other.

Low order pulverized coal pyrolysis system the most according to claim 1, it is characterised in that described gas-collecting branch pipe is along described gas collection The length direction of house steward is arranged parallel to each other,

Optional, described gas-collecting branch pipe is perpendicular to described gas collecting main pipe.

Low order pulverized coal pyrolysis system the most according to claim 1, it is characterised in that described oil gas derives pipeline along described The short transverse multi-tier arrangement of pyrolysis reactor, every layer has many oil gas the most parallel to each other and derives pipeline.

Low order pulverized coal pyrolysis system the most according to claim 1, it is characterised in that described oil gas derives pipeline with described Heat accumulation type radiant tube is arranged in parallel, and the respective left and right sides of described heat accumulation type radiant tube is symmetrically arranged with two oil gas delivery lines Road.

Low order pulverized coal pyrolysis system the most according to claim 4, it is characterised in that described oil gas derives pipeline with neighbouring The spacing of tube wall of described heat accumulation type radiant tube be that described oil gas derives pipe diameter d 1/2-3 times.

6. according to the low order pulverized coal pyrolysis system according to any one of claim 1-5, it is characterised in that described oil gas is derived Multiple through hole it is provided with on the tube wall of pipeline.

Low order pulverized coal pyrolysis system the most according to claim 6, it is characterised in that described through hole is derived at described oil gas It is uniformly distributed on the length direction of pipeline.

Low order pulverized coal pyrolysis system the most according to claim 3, it is characterised in that oil gas described in same layer derives pipeline It is communicated to same described gas-collecting branch pipe.

Low order pulverized coal pyrolysis system the most according to claim 1, it is characterised in that outside described second cyclone separator It is welded with support bar, with fixing described second cyclone separator between wall and the described heat accumulation type radiant tube being adjacent.

Low order pulverized coal pyrolysis system the most according to claim 1, it is characterised in that farther include:

Breaker；

Second feed screw, described second feed screw is connected with described breaker；

Coal bunker, described coal bunker is connected with described second feed screw；

3rd feed screw, described 3rd feed screw is connected with the feed(raw material)inlet of described coal bunker and described dry riser Logical.