CN104877710A - Flash multiple-bin gasification furnace - Google Patents
Flash multiple-bin gasification furnace Download PDFInfo
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- CN104877710A CN104877710A CN201510321128.2A CN201510321128A CN104877710A CN 104877710 A CN104877710 A CN 104877710A CN 201510321128 A CN201510321128 A CN 201510321128A CN 104877710 A CN104877710 A CN 104877710A
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Abstract
The invention provides a flash multiple-bin gasification furnace. The flash multiple-bin gasification furnace is sequentially divided into a destructive distillation zone, an oxidation zone and a reduction zone in the length direction of the flash multiple-bin gasification furnace. The destructive distillation zone and the oxidation zone are spaced through a first wall. A first annular air box is arranged at the position of one side, close to the first wall, inside the destructive distillation zone. Multiple material guide holes for a destructive distillation product to pass through are formed in the first wall. An annular sealing cover surrounds the gasification furnace, and a sealed cavity is formed between the sealing cover and the gasification furnace. The sealing cover is provided with an oxygen inlet, and the oxygen inlet is connected with an oxygen delivery device. The first annular air box is communicated with the sealed cavity, and an air delivery tube of the first annular air box extends into the oxidation zone. The flash multiple-bin gasification furnace can achieve detonation effect, enables waste incineration time to be less than 0.2 second at the temperature ranging from 400 DEG C to 700 DEG C, accordingly enables no dioxin to be produced in waste incineration and has the advantages of being green and environment-friendly.
Description
Technical field
The present invention relates to Domestic garbage treatment equipment field, in particular to flash many storehouses vapourizing furnace.
Background technology
In order to remove chimney when burning domestic garbage, prior art is sent into rotary kiln type vapourizing furnace after being dried by refuse breaking and is converted into combustion gas.This combustion gas carries out methanation after vapourizing furnace is discharged, and calorific value can be increased to and meet national Natural gas standard.This technique domestic refuse being converted into Sweet natural gas does not have chimney, namely removes chimney, is easily accepted.
Patent No. ZL 201420594937.1 discloses a kind of pocket wheel fire grate horizontal revolving vapourizing furnace, and this vapourizing furnace has two distinguishing features:
One be its pocket wheel fire grate is L-type, and be with 90 ° of bendings, the circular arc of it and cylinder of rotary kiln forms " pocket ", isometric with cylinder of rotary kiln, be fixed on rotary kiln inwall, the material in burner hearth is caught, material is mentioned by the revolution with rotary kiln, is more constantly raised by material along with the revolution of rotary kiln.Because the fire grate stalk in 90 ° of bendings constitutes hydraucone with the circular arc of kiln wall, therefore lifting is from 45 °, upper right side, is all raising for 45 ° to upper left side, makes the material of full burner hearth define sulphided state.The CO now generated in rotary kiln
2the abundant contact reacts of carbon with the semicoke generated, can generate the combustion gas of the components such as CO, CH4.
Two is that vapourizing furnace inside is divided into three regions: dry distillation area, oxidation zone and reduction zone, and these three regions are notional division, unactual obstruct is opened, and be only pass into oxygen in the oxidation zone to middle portion, and dry distillation area and reduction zone does not pass into oxygen.
Above-mentioned 2 is that combustion gas is of crucial importance to garbage conversion, but also there is following limitation:
Vapourizing furnace inside is divided into dry distillation area, oxidation zone and reduction zone, and these three regions are notional division, and unactual obstruct is opened.Like this, the inflammable gas that dry distillation area produces flow to oxidation zone and catches fire, though temperature rise rate is fast, temperature is still and seamlessly transits rising, does not rise to from 400 DEG C to 700 DEG C.And generally acknowledge that waste incineration can not produce dioxin from during the time < 0.2 second of 400 DEG C to 700 DEG C in the world, indication is detonation, and temperature is for rising to.Above-mentioned vapourizing furnace just cannot ensure the time < 0.2 second being raised to 700 DEG C from 400 DEG C, also just cannot ensure to produce dioxin.
In view of this, special proposition the present invention.
Summary of the invention
The object of the present invention is to provide a kind of flash many storehouses vapourizing furnace, described vapourizing furnace can realize detonation effect, make waste incineration be raised to the time < 0.2 second of 700 DEG C from 400 DEG C, thus make waste incineration produce dioxin, there is the advantage of environmental protection.
In order to realize above-mentioned purpose of the present invention, spy by the following technical solutions:
A kind of flash many storehouses vapourizing furnace, described vapourizing furnace is divided into dry distillation area, oxidation zone and reduction zone along its length successively; Described dry distillation area and described oxidation zone are separated by the first wall; The inside of described dry distillation area is provided with the first annular bellows near the side place of described first wall;
Described first wall be provided with multiple can by the material guide hole of gasification product;
Described vapourizing furnace periphery is wound with the seal closure of annular, forms sealed cavity between described seal closure and described vapourizing furnace; Described seal closure is provided with oxygen intake, and described oxygen intake is connected with oxygen supply device;
Described first annular bellows is communicated with described sealed cavity, and the wind conveying pipe of described first annular bellows stretches into the inside of described oxidation zone.
Above-mentioned vapourizing furnace adopt the mode cut off by dry distillation area and oxidation zone separated, therefore the temperature in two regions can separately be controlled, joining place temperature in two regions cannot be seamlessly transitted, thus the temperature of the gas making dry distillation area produce rises to more than 700 DEG C from less than 400 DEG C, realize detonation effect, avoid the generation of dioxin.
The principle of work of above-mentioned vapourizing furnace is as follows:
Above-mentioned vapourizing furnace adopt the mode cut off by dry distillation area and oxidation zone separated, therefore the temperature in two regions can separately be controlled, joining place temperature in two regions cannot be seamlessly transitted, thus the temperature of the gas making dry distillation area produce rises to more than 700 DEG C from less than 400 DEG C, realize detonation effect, avoid the generation of dioxin.
Meanwhile, along with the revolution of vapourizing furnace, destructive distillation product enters oxidation zone by the material guide hole of the first wall and carries out follow-up reaction.Now because the obstruct of the first wall makes the cross-sectional area of gas process greatly reduce, so the linear flow speed of gas improves, by the time shorten of the first wall, realize temperature-jump.In actual mechanical process, as long as control the volumetric flow rate of gas, the crossing time of gas can be made to be less than 0.2 second, be specially: the hole depth of the material guide hole of the first wall is h, porose cross-sectional area summation be s, the volumetric flow rate of gas is V, and V is met the following conditions, h/ (V/s) <0.2 second, i.e. h*s/V<0.2 second.
As can be seen here, above-mentioned vapourizing furnace achieves temperature-jump by controlling dry distillation area temperature and improving gas in linear velocity two kinds of modes of zone of transition.
In addition, when using above-mentioned vapourizing furnace, if input normal temperature oxygen in sealed cavity, better to the cooling-down effect of dry distillation area.
Preferably, the inside of the termination of described dry distillation area is provided with the second annular bellows; The furnace wall of described vapourizing furnace is provided with multiple oxygen through hole;
Described second annular bellows is communicated with described sealed cavity by described oxygen through hole, and the outside that the wind conveying pipe of described second annular bellows stretches out described sealed cavity is communicated with described first annular bellows.
More than design can reach following technique effect:
First, in the termination of whole vapourizing furnace, the second annular bellows is set, the soft seal between sealed cavity and the second annular bellows can be made by wind mechanism away from the higher oxidation zone (temperature is more than 700 DEG C) of temperature, protection by wind mechanism not by high temperature failure; And the first annular bellows is connected with the second annular bellows, be not connected with sealed cavity, therefore do not need soft seal to be subject to wind mechanism, also just there is not the problem that soft seal mechanism is burned.
Secondly, the second annular bellows is arranged on the termination of dry distillation area, i.e. the kiln hood position of vapourizing furnace; temperature is herein about only 100 DEG C; soft seal can not be burnt out by wind mechanism, but also a buildings or protective guard can be built at kiln hood annular bellows is hidden in the inside, not only safety but also attractive in appearance.
In addition, on the wind conveying pipe of the first annular bellows or the second annular bellows, valve can also be set, to control oxygen flow.
On this basis, can also by oxidation zone Discrete control, such as: described oxidation zone is divided into naked light storehouse and high temperature storehouse along the length direction of described vapourizing furnace, described naked light storehouse and described high temperature storehouse are separated by the second wall, and described second wall is provided with the material guide hole by gasification product; Described high temperature storehouse and described reduction zone are separated by the 3rd wall being provided with material guide hole; The wind conveying pipe of described first annular bellows stretches into the inside in described naked light storehouse; The inside of described dry distillation area is provided with the 3rd annular bellows near described first annular bellows place; Described 3rd annular bellows is connected with the wind conveying pipe of described second annular bellows, and the wind conveying pipe of described 3rd annular bellows stretches into the inside in described high temperature storehouse.
Oxidation zone is divided into naked light storehouse and two sections, high temperature storehouse by above-mentioned design, achieves following technique effect:
One, avoid the temperature in naked light storehouse too high: by first annular bellows control naked light storehouse give oxygen amount, the semicoke that destructive distillation produces and gas enter naked light storehouse and run into limited oxygen and produce naked light, but be unlikely to make the temperature in naked light storehouse far away higher than 700 DEG C, thus make the dry distillation area temperature rising affected by naked light storehouse radiant heat be unlikely to far above 400 DEG C, to avoid the too high generation dioxin of destructive distillation storehouse temperature.
Two, the cleavage rate of tar is improved: input abundant oxygen by the second annular bellows to high temperature storehouse, prevent heat from diffusing to reduction zone too quickly by the obstruct of the 3rd wall simultaneously, both combine and make its temperature reach 1000-1050 DEG C above, thus make the whole cracking of tar, improve gasification efficiency.For the vapourizing furnace for the treatment of refuse 300t/d, all walls are annular walls, the second wall height 600mm, identical with the structure of the first wall, 3rd wall height 800mm (bore central structure is identical with the first wall) is high temperature storehouse burner hearth between the second wall and the 3rd wall.The amount of oxygen sent in vapourizing furnace, is equivalent to about 15% of theoretical air requirement, and namely about 15% of material combustibleconstituents in naked light storehouse and the burning of high temperature storehouse, generates CO
2with water vapour heat release; About 85% of material combustibleconstituents, not in naked light storehouse and high temperature storehouse burning (because only to oxygen of theoretical air requirement about 15%), but cross the 3rd wall with the form of carbide (being called semicoke), enter into reduction zone and the CO from naked light storehouse and high temperature storehouse
2with water vapour reaction, generate CO, CH
4, H
2deng combustion gas.The major portion sending into the oxygen of vapourizing furnace all sends into high temperature storehouse, thus the fire in high temperature storehouse is very prosperous, semicoke is blocked by the 3rd wall that 800mm is high, mentioned by fire grate band in high temperature storehouse and raise and to fall and melting is seethed, oxygen from the 3rd annular bellows is again hot blast, so high temperature storehouse can be stablized reach 1000-1050 DEG C.
Three, three annular bellows are set, both can lower the temperature to dry distillation area, oxygen can be made again to be preheated.In three annular bellows under the impact of normal temperature oxygen, dry distillation area is near the cooling of the position of the first wall, and temperature is < 400 DEG C all the time, so dry distillation area top temperature is < 400 DEG C all the time.
Preferably, the wind conveying pipe of described second annular bellows is connected with an arm, and described arm stretches into the inside of described dry distillation area; Namely the second annular bellows also can inject oxygen in dry distillation area, to send oxygen to improve temperature when dry distillation area temperature is too low, improves dry distillation efficiency.
When the second annular bellows is to first and the 3rd annular bellows shunting, advise on the wind conveying pipe of the second annular bellows, separate two arms, respectively connection first and the 3rd annular bellows, so that the independent oxygen input controlling two oxidation zones.In addition, the wind conveying pipe of the 3rd annular bellows also can install a Valve control gas flow, the valve on first, second and the 3rd annular bellows can selectivity be installed as required.Such as, if dry distillation area temperature is too low, to such an extent as to destructive distillation effect can not be played, then open the valve leading to dry distillation area and be in charge of, send into appropriate oxygen, under naked light storehouse thermal radiation condition, the oxygen sending into destructive distillation storehouse can react with the carbon (C) in material, accelerates generation and the CO of inflammable gas
2generation.Generate CO
2process be namely the process of heat release, dry distillation area temperature can be made to raise.Reduce during the temperature drift of dry distillation area and send oxygen amount until turn off valve completely.
Preferably, first, second, third annular bellows is heat resisting pipe.
Preferably, the first annular bellows one encloses welding more than 2 places and stretches out defeated air hardening steel pipe, is preferably and welds out 4, to naked light storehouse uniform throughout delivering oxygen.In like manner, the 3rd annular bellows one encloses welding more than 2 places and stretches out defeated air hardening steel pipe, is preferably and welds out 4.
Preferably, when the first wall adopts the structure of annular walls, the inner casing of the first annular bellows and the 3rd annular bellows is shorter than the first wall, namely compares the first wall further from vapourizing furnace center, preferred short 100mm: prevent annular bellows from stopping the flowing of material.
Preferably, Plate Welding is used between the outer end of the first annular bellows and the 3rd annular bellows and vapourizing furnace housing.The circumference one facing the position of the first annular bellows and the 3rd annular bellows after welding at vapourizing furnace housing encloses and punches respectively, and Welded Steel Pipe makes the first annular bellows be connected with the wind conveying pipe (i.e. house steward) of the second annular bellows with the 3rd annular bellows, from house steward oxygen from then on steel pipe enter respectively in the first, the 3rd annular bellows.
Preferably, the both sides of described first wall are equipped with thermopair, with the temperature of Real-Time Monitoring dry distillation area and oxidation zone, for production process provides reference.Certainly, according to actual needs, also in other position of vapourizing furnace, thermopair can be installed, and by wireless temperature transmitter, signal be delivered to watch-keeping cubicle display.
Preferably, described first wall comprises annular walls and steel plate, and the inwall of described annular walls and described steel plate are by many fastener for connection, and the outer wall of described annular walls is connected with the inwall of described vapourizing furnace.
Above-mentioned design merely provides a preferred wall construction, and it can reach following technique effect:
One, to ensure in vapourizing furnace that reaction is everywhere homogeneous: design circumferentially circle material guide hole being dispersed in kiln above, now reaction mass can be dispersed into multiple independently stockpile by this circle material guide hole, enter oxidation zone respectively, the material of oxidation zone is evenly distributed, reaction also just evenly.
Two, the cross-sectional area that passes through of gas is reduced: annular walls, steel plate and steel pipe shutoff segment space, reduces the cross-sectional area that gas passes through.
In order to realize the controlled function of sectional area that gas passes through, preferably, described steel plate is provided with the hole that can open and close, and such as, at the central borehole of steel plate, and adds removable cover with lockhole, to adjust aperture sectional area as required.Above annular walls and steel plate can be circular, also can be square or other shapes.
Preferably, during affiliated vapourizing furnace treating refuse 300t/d, adopt above preferred first wall construction, be specially: its rotary kiln (i.e. the internal diameter of vapourizing furnace) diameter 3m, first wall height 0.6m (being 0.6m × 2=1.2m up and down), its material is refractory materials.Diameter 3m deducts 1.2m, and the diameter of the first wall central aperture is 1.8m.This bore central arranges a circular heat-resisting steel sheet and plate, and its size thickness needs according to design calculation and determines, and is preferably Φ 0.5m-1m.This circular heat-resisting steel sheet and plate props up heat resisting pipe by 3-8 in one week and supports, and is preferably 6 steel pipe supports, and the other end of heat resisting pipe stretches into first and fixes within the walls.Space between supporting steel pipe, crosses the first wall for the gas of dry distillation area and material and flows to naked light storehouse.The central authorities of this circular heat-resisting steel sheet and plate can also borehole add removable cover with lockhole, to adjust aperture sectional area as required.Heat-resisting steel sheet and plate can be circular, also can be square or other shapes.First wall outer ring (or claiming root) is welded with vapourizing furnace hull plate, first within the walls side (or claim top, by one end, burner hearth center) thickness be 50-200mm, be preferably 50mm, now designing the flow velocity that dry distillation area gas crosses the first wall is 1m/s, and it is 0.05 second that dry distillation area gas crosses the time that the first wall enters naked light storehouse.
Preferably, described reduction zone is divided into multiple sub-storehouse along the length direction of described vapourizing furnace, and adjacent two described sub-storehouses are separated by the wall being provided with material guide hole.
With wall, reduction zone is divided into multiple sub-storehouse, the effect of barrier gas can be played, reduce the flow velocity of gas, thus make reduction zone form pressure-fired, to improve CH
4and C
2+ growing amount, the cost of follow-up methanation is reduced.Wall between sub-storehouse is provided with material guide hole, can ensure material smooth flow.Wall between sub-storehouse can adopt various structures, preferably adopts the design of annular walls, makes reaction in furnace homogeneous.Preferably, reduction zone is divided into 2-20 sub-storehouse.
More preferably, reduction zone is divided into three storehouses, and controls the temperature in three storehouses respectively, make three storehouses that different chemical reaction occur, thus generate more CH after making semicoke, tar, gas reaction
4and C
2+.
Such as, described reduction zone is divided into time high temperature storehouse, heating cabinet and thermostatical storehouse along the length direction of described vapourizing furnace, is separated between two adjacent storehouses by the wall being provided with material guide hole; And be provided with heating unit in described heating cabinet.
Adopt above-mentioned design, CH
4and C
2+ growing amount > 30%, can guarantee that fuel gases calorific value is stable and be promoted to 8000Kcal/Nm
3, make follow-up methanation facility only need single tower.Because reduction reaction is thermo-negative reaction, because the temperature in this high temperature storehouse progressively reduces by about 1000 DEG C, when the wall arrived between heating cabinet advanced by material from secondary high temperature storehouse, temperature has been reduced to < 750 DEG C, so need heating at heating cabinet, otherwise be unfavorable for CH
4generation, and prevent the generation of C5-C17 alkane (being commonly called as tar).Therefore, in heating cabinet, heating unit is installed, preferred employing low-voltage high-frequency heating unit, three-phase alternating current is adjusted to 10000-30000HZ by 50HZ, be preferably 15000-20000HZ, embed conductive seat by conducting slip ring on vapourizing furnace shell, the alternating-current of being down to safety voltage is introduced a lot of heating unit being arranged on burner hearth, send the high temperature of 900 DEG C-1100 DEG C, by gas heating to > 850 DEG C.The material of described heating unit is high temperature steel, is preferably miramint.The material that heating cabinet generates and gas are crossed wall and are entered thermostatical storehouse, and the temperature of thermostatical storehouse is preferably constant more than 730 DEG C.Material and gas continue to generate CO, CH at thermostatical storehouse
4, H
2, C
2the combustibleconstituentss such as+alkane, these gaseous products eventually on enter tornado dust collector-FeAl film dust-remover-air heat exchanger and enter next procedure; Slag enters relevant device and discharges.
This unlike the prior art, wall segmentation is not used in the reduction zone of prior art, and under induced draft fan effect, reduction zone is negative pressure, and CH in the combustion gas generated under negative pressure operating mode
4and C
2+ alkane is by < 15%, follow-up when carrying out methanation operation, is difficult to be brought up to by fuel gases calorific value with single tower meet Sweet natural gas GB, must strengthen cost methanation, fuel gases calorific value just can be made to meet Sweet natural gas GB.And multiple walls that reduction zone of the present invention is arranged, can hot gas be stopped and make reduction zone form pressure-fired, thus making CH in the combustion gas of generation
4and C
2+ alkane reaches more than 30%, makes follow-up methanation only need single tower, the calorific value of combustion gas just can be made stably to be promoted to and meet Sweet natural gas GB.
In addition, can also arrange the wall being distributed with material guide hole at the tail end of described thermostatical storehouse, the material that thermostatical storehouse is generated and gas enter subsequent handling again through last wall, can improve the air pressure of reduction zone so further, thus improve CH
4and C
2+ growing amount.
Preferably, described vapourizing furnace comprises fire grate, and described fire grate is obstructed by multiple T-shaped fire grate and forms; The bending end of described fire grate stalk stretches to the axle center of described vapourizing furnace, and the other end is connected with the inwall of described vapourizing furnace.
Such scheme fire grate is set to T-shaped after, electric motor rotates and reverse and can both catch material, falls with mentioning to raise along with the revolution of vapourizing furnace again, burner hearth formed sulphided state.Like this, compare L-type fire grate, the replacement cycle of fire grate, by prolongation 1 times, was extended for 10 years by 5 years.And fire grate T prefix is preferably alloy material, wherein dry distillation area < 400 DEG C, the furnace grate material in dry distillation area is preferably and adopts 0Cr25Ni20 high temperature steel, and other storehouses adopt 314# high temperature steel or miramint material to make.After adopting alloy material, fire grate stalk can be separated with T prefix, fire grate stalk mould material, the pre-buried built-in fitting be connected with T prefix, built-in fitting opens long lumbar hole, and T prefix alloy bar can the every long 1-2m of bar, be connected with bolt between obstructing with fire grate, can blowing out welding or replacing if any damage.In addition, fire grate is preferably made up of the individual T-shaped fire grate stalk of 6-16.
Preferably, the junction of described second annular bellows and described sealed cavity is provided with soft seal by wind mechanism, the good sealing property of cavity while of ensureing that air blast smoothly; In like manner, the head and the tail two ends of described seal closure can also be made all to be connected with described vapourizing furnace by soft seal pad.
Preferably, above-mentioned soft seal comprises four-layer structure by wind mechanism: be made up of heat-resisting steel layer, wear-resisting stratum reticulare, carbon aluminosilicate fiber composite layer, stainless steel layer successively from internal layer outer layers.Should can not only be attached to for a long time on furnace shell by wind mechanism and use, and its sealing property is extremely excellent, can prevent the H in vapourizing furnace
2, the inflammable, explosive, poisonous gas overflowing such as CO.
Preferentially, forward and backward riding wheel apparatus is also comprised; The two ends of the furnace shell of described vapourizing furnace respectively movable sleeve are connected to wheel belt, the two ends of described furnace shell are bearing on described forward and backward riding wheel apparatus by described wheel belt, described rear riding wheel apparatus is provided with baffle plate, the baffle plate Structure deformation that the wheel belt of the afterbody of described furnace shell and described rear riding wheel apparatus are arranged.This structure ensures the firm of vapourizing furnace.Preferably, each support roller all establishes temperature measuring equipment, and thermometric signal is sent to master control room and arrange indicating gauge on kiln pier, when bearing temperature is more than 55 DEG C, should send alarm signal, so that timely check processing.
Preferentially, also transmission mechanism is comprised; The outer wall of described furnace shell is arranged with gear ring, and described transmission mechanism is located at the bottom of described furnace shell, and described gear ring and the engagement of described transmission mechanism, drive described furnace shell around axial rotation.
Preferentially, discharge cover and charging cover is also comprised; Described discharge cover and charging cover are located at feed end and the discharge end of described furnace shell respectively.
Preferentially, also comprise forward and backward tightness system, described forward and backward tightness system is identical by the structure of wind mechanism with described soft seal; Described forward and backward tightness system is located on the outer wall of the junction that described discharge cover is connected with described furnace shell with charging cover respectively.
Preferentially, in order to impel the gas of material and generation more successfully can flow to discharge end, the sine value arranging the axis of described vapourizing furnace and the inclination angle of horizontal plane is 3%-4%.
Preferentially, according to actual needs, described fire grate can arrange 6-16 bar, and the mould material that described in every bar, T-shaped fire grate stalk all adopts heat resistant and wear resistant to damage acidproof shock resistance good is made, and its T prefix is that alloy is made.
Preferentially, the oxygen inputted in sealed cavity is the high purity pure oxygen of oxygen level 70-99.6%, or derives from cleaned air and water vapour.
Compared with prior art, beneficial effect of the present invention is:
(1) dioxin can not be produced: wall is set between dry distillation area and oxidation zone (or naked light storehouse), the temperature of dry distillation area < 400 DEG C all the time under the cooling of the first annular bellows and the obstruct of the first wall, and a wall every the naked light temperature > 700 DEG C all the time of oxidation zone (or naked light storehouse).Therefore, adjustment gas flow rate just can ensure that gas is raised to the time < 0.2 second of 700 DEG C from 400 DEG C, can not produce dioxin.
(2) improve goudron lysis rate: oxidation zone is divided into naked light storehouse and high temperature storehouse, improves goudron lysis rate: the left side, high temperature storehouse is the second wall and naked light storehouse, and the temperature in naked light storehouse is more than 700 DEG C; The oxygen supply of high temperature storehouse is relatively abundant, and separated by the 3rd wall and reduction zone, therefore carbide (semicoke) fully can seethe melting at this, makes in storehouse that temperature-stable is at 1000-1050 DEG C, and the tar now in combustion gas is by whole cracking, and gas making efficiency significantly improves.And prior art does not set up annular walls, under the effect of kiln tail induced draft fan, the heat of oxidation zone is taken out toward reduction zone unobstructed straight, and high temperature storehouse temperature is difficult to be stabilized in more than 1000 DEG C.
(3) methanation cost is reduced: the present invention arranges time high temperature storehouse and the 4th wall, heating cabinet and the 5th wall, thermostatical storehouse and the 6th wall, play and extend the effect of gas in the reduction zone residence time, and reduction zone can be made to form pressure-fired, make reduction reaction more abundant; Also owing to being provided with heating cabinet, guarantee the temperature > 730 DEG C all the time of reduction zone; The net effect of these factors is the CH in gas-fired products
4and C
2+ content>=30%, vapourizing furnace de-CO is again discharged in combustion gas
2after, calorific value is about 5000Kcal/Nm
3.The combustion gas of such quality, when follow-up methanation, only needs single tower methanation that fuel gases calorific value just can be made to meet Sweet natural gas GB and reaches 8000kcal/m
3.
(4) extend work-ing life of vapourizing furnace: the present invention fire grate is changed into T-shaped after, electric motor rotates and reverse and can both catch material, and with mention, along with the revolution of rotary kiln, poplar falls again, in burner hearth formation sulphided state.Like this, the replacement cycle (life-span) of fire grate, by prolongation 1 times, was extended for 10 years by 5 years.
(5) appearance design is safer attractive in appearance: soft seal moves on to the kiln hood position of vapourizing furnace by wind mechanism, temperature of kiln head only about 100 DEG C, consumable accessory can not be become because fire box temperature is high by wind mechanism, and only need one by wind mechanism, just can give naked light storehouse, high temperature storehouse, dry distillation area oxygen supply.What maintain static is affixed on vapourizing furnace shell by wind mechanism bag, in the vapourizing furnace housing of correspondence position, the second annular bellows is set, like this, do not turn by wind mechanism, vapourizing furnace together with the second annular bellows revolution of installing its inwall, and is subject to the oxygen in wind mechanism cavity, the second annular bellows is entered by vapourizing furnace and the second annular bellows hole of a week, buildings can be set at kiln hood like this, fixing be placed on the inside by wind mechanism and the device that heavily hangs down thereof, realize not only safety but also object attractive in appearance.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below.
The structural representation of flash many storehouses vapourizing furnace that Fig. 1 provides for embodiment 1;
Fig. 2 is the partial enlarged drawing at A place in Fig. 1;
The structural representation of flash many storehouses vapourizing furnace that Fig. 3 provides for embodiment 2;
Fig. 4 is the partial enlarged drawing at B place in Fig. 2;
Fig. 5 is the sectional view perpendicular to axial direction of vapourizing furnace;
Reference numeral:
1-dry distillation area, 2-oxidation zone, 3-reduction zone, 4-sealed cavity, 5-seal closure, 6-first annular bellows, 7-first wall, 8-the 3rd annular bellows, 9-furnace shell, 10-second annular bellows, 11-soft seal is by wind mechanism, 12-charging cover, 13-transmission mechanism, riding wheel apparatus after 14-, 15-supporting device, 16-stove tail sealing device, 17-discharge cover, 18-fire grate obstructs, 19-oxygen through hole, 20-oxygen intake;
201-naked light storehouse, 202-second wall, 203-high temperature storehouse, 204-the 3rd wall, 301-high temperature storehouse, 302-the 4th wall, 303-heating cabinet, 304-the 5th wall, 305-thermostatical storehouse, 306-the 6th wall, 307-heating unit.
Embodiment
Below in conjunction with embodiment, embodiment of the present invention are described in detail, but it will be understood to those of skill in the art that the following example only for illustration of the present invention, and should not be considered as limiting the scope of the invention.Unreceipted actual conditions person in embodiment, the condition of conveniently conditioned disjunction manufacturers suggestion is carried out.Agents useful for same or the unreceipted production firm person of instrument, be and can buy by commercially available the conventional products obtained.
Embodiment 1
A kind of flash many storehouses vapourizing furnace, as shown in Fig. 1,2 and 5, structure is as follows:
Described vapourizing furnace is divided into dry distillation area 1, oxidation zone 2 and reduction zone 3 along its length successively; Described dry distillation area 1 is separated by the first wall 7 with described oxidation zone 2; The inside of described dry distillation area 1 is provided with the first annular bellows 6 near the side place of described first wall 7; Described first wall 7 be provided with multiple can by the material guide hole of gasification product.
Described vapourizing furnace periphery is wound with the seal closure 5 of annular, forms sealed cavity 4 between described seal closure 5 and described vapourizing furnace; Described seal closure 5 is provided with oxygen intake 20, and described oxygen intake 20 is connected with oxygen supply device.
Described first annular bellows 6 is communicated with described sealed cavity 4, and the wind conveying pipe of described first annular bellows 6 stretches into the inside of described oxidation zone 2.
Embodiment 2
A kind of flash many storehouses vapourizing furnace, as in Figure 3-5, structure is as follows:
Described vapourizing furnace comprises fire grate, and described fire grate obstructs 18 by multiple T-shaped fire grate and forms; The bending end of described fire grate stalk 18 stretches to the axle center of described vapourizing furnace, and the other end is connected with the inwall of described vapourizing furnace.
Described vapourizing furnace is divided into dry distillation area 1, naked light storehouse 201, high temperature storehouse 203, secondary high temperature storehouse 301, heating cabinet 303 and thermostatical storehouse 305 along its length successively, described dry distillation area 1 is separated by the first wall 7 with described naked light storehouse 201, described naked light storehouse 201 is separated by the second wall 202 with high temperature storehouse 203, high temperature storehouse 203 is separated by the 3rd wall 204 with time high temperature storehouse 301, secondary high temperature storehouse 301 is separated by the 4th wall 302 with heating cabinet 303, heating cabinet 303 and thermostatical storehouse 305 are separated by the 5th wall 304, and the end (i.e. the end of vapourizing furnace) of thermostatical storehouse 305 is provided with the 6th wall 306; And be provided with heating unit 307 in described heating cabinet 303.
Described first wall 7 comprises annular walls and steel plate, and the inwall of described annular walls and described steel plate are by many fastener for connection, and the outer wall of described annular walls is connected with the inwall of described vapourizing furnace, and described steel plate is provided with the hole that can open and close.Second wall 202, the 3rd wall 204, the 4th wall 302, the 5th wall 304 and the 6th wall 306 are central authorities and establish eurypyloue annular walls.
Described vapourizing furnace periphery is wound with the seal closure 5 of annular, forms sealed cavity 4 between described seal closure 5 and described vapourizing furnace; Described seal closure 5 is provided with oxygen intake 20, and described oxygen intake 20 is connected with oxygen supply device; The furnace wall of described vapourizing furnace is provided with multiple oxygen through hole 19.The head and the tail two ends of described seal closure 5 are all connected with described vapourizing furnace by soft seal pad, such as stove tail sealing device 16.
The inside of described dry distillation area 1 is provided with the first annular bellows 6 near the side place of described first wall 7, and the inside of the termination of described dry distillation area 1 is provided with the second annular bellows 10, and the inside of described dry distillation area 1 is provided with the 3rd annular bellows 8 near described first annular bellows 6 place.Described second annular bellows 10 is communicated with described sealed cavity 4 by described oxygen through hole 19, connectivity part is provided with soft seal by wind mechanism 11, the wind conveying pipe of described second annular bellows 10 stretches out the outside of described sealed cavity 4, and extend along the direction being parallel to vapourizing furnace axis, this pipe is as house steward, this house steward connects three be in charge of, be wherein in charge of the inside stretching into dry distillation area 1 for one, be in charge of and lead to the first annular bellows 6 and the 3rd annular bellows 8 respectively for other two.The wind conveying pipe of described first annular bellows 6 stretches into the inside in described naked light storehouse 201, and the wind conveying pipe of described 3rd annular bellows 8 stretches into the inside in described high temperature storehouse 203.
The wind conveying pipe of the wind conveying pipe of the first annular bellows 6, the wind conveying pipe of the second annular bellows 10 and the 3rd annular bellows 8 is respectively equipped with valve.
Charging cover 12, discharge cover 17 is respectively equipped with in the two ends of vapourizing furnace.
Also comprise transmission mechanism 13; The outer wall of described furnace shell 9 is arranged with gear ring, and described transmission mechanism 13 is located at the bottom of described furnace shell 9, and described gear ring and described transmission mechanism 13 engage, and drives described furnace shell 9 around axial rotation.
Also comprising riding wheel apparatus 14, can be that more than 2 grades of riding wheel apparatus support, each 1 grade of i.e. 2 grades of riding wheel apparatus support before and after being preferably; Be respectively installed with wheel belt at described furnace shell 9 with riding wheel apparatus corresponding position, described furnace shell 9 is bearing in Structure deformation on described riding wheel apparatus 14 by described wheel belt, and the pedestal of riding wheel apparatus is then fixed on concrete pedestal.
Use during above vapourizing furnace and should note following item:
In order to impel the gas of material and generation more successfully can flow to discharge end, the sine value arranging the axis of described vapourizing furnace and the inclination angle of horizontal plane is 3%-4%.
Before equipment is installed, the absolute altitude plate as sedimentation mark all should be buried underground in the corner of each kiln pier foundation, four monumented points should adjust on same level absolute altitude, error must not be greater than 0.5mm, is also provided with corresponding absolute altitude in the appropriate location of kiln hood platform kiln tail factory building, for detecting the sedimentation on basis, during installation, with furnace shell 9 cross-section center under two gear wheel bands for line, relative furnace shell 9 cross-section center allows to reduce a little, and tolerance is 1.5 ± 0.5mm.
Main drive motor and helper drive motor power are provided with interlock, when helper drive motor power is connected, main drive motor power supply must cut off automatically, and when main drive motor is connected, the helical teeth clutch coupling connecting major-minor transmission must be thrown off for first time.And stir its other limit switch, to cut off accessory drive gear 13 simultaneously.
The operation of kiln should ensure that furnace shell 9 surface temperature control is below 340 DEG C, only allows at short notice to be up to 380 DEG C, advises carrying out air blast cooling, to guarantee to reach above-mentioned requirements to furnace shell 9 surface.This equipment making performs by People's Republic of China (PRC) building standard JC333-91.
Main motor pull-in torque is 2.5 times of nominal torque, and shell protection grade is IP44, and insulation level is F level.
Although illustrate and describe the present invention with specific embodiment, however it will be appreciated that can to make when not deviating from the spirit and scope of the present invention many other change and amendment.Therefore, this means to comprise all such changes and modifications belonged in the scope of the invention in the following claims.
Claims (10)
1. flash many storehouses vapourizing furnace, is characterized in that, described vapourizing furnace is divided into dry distillation area, oxidation zone and reduction zone along its length successively; Described dry distillation area and described oxidation zone are separated by the first wall; The inside of described dry distillation area is provided with the first annular bellows near the side place of described first wall;
Described first wall be provided with multiple can by the material guide hole of destructive distillation product;
Described vapourizing furnace periphery is wound with the seal closure of annular, forms sealed cavity between described seal closure and described vapourizing furnace; Described seal closure is provided with oxygen intake, and described oxygen intake is connected with oxygen supply device;
Described first annular bellows is communicated with described sealed cavity, and the wind conveying pipe of described first annular bellows stretches into the inside of described oxidation zone.
2. flash many storehouses according to claim 1 vapourizing furnace, is characterized in that, the inside of the head end of described dry distillation area is provided with the second annular bellows;
The furnace wall of described vapourizing furnace is provided with multiple oxygen through hole;
Described second annular bellows is communicated with described sealed cavity by described oxygen through hole, and the outside that the wind conveying pipe of described second annular bellows stretches out described sealed cavity is communicated with described first annular bellows.
3. flash many storehouses according to claim 2 vapourizing furnace, it is characterized in that, described oxidation zone is divided into naked light storehouse and high temperature storehouse along the length direction of described vapourizing furnace, and described naked light storehouse and described high temperature storehouse are separated by the second wall, and described second wall is provided with the material guide hole by gasification product; Described high temperature storehouse and described reduction zone are separated by the 3rd wall being provided with material guide hole;
The wind conveying pipe of described first annular bellows stretches into the inside in described naked light storehouse;
The inside of described dry distillation area is provided with the 3rd annular bellows near described first annular bellows place; Described 3rd annular bellows is connected with the wind conveying pipe of described second annular bellows, and the wind conveying pipe of described 3rd annular bellows stretches into the inside in described high temperature storehouse.
4. flash many storehouses according to claim 2 vapourizing furnace, is characterized in that, the wind conveying pipe of described second annular bellows is connected with an arm, and described arm stretches into the inside of described dry distillation area; Preferably, the both sides of described first wall are equipped with thermopair.
5. flash many storehouses according to claim 3 vapourizing furnace, is characterized in that, has at least one to be provided with valve in the wind conveying pipe of the wind conveying pipe of described first annular bellows, the wind conveying pipe of described second annular bellows, described 3rd annular bellows.
6. flash many storehouses according to claim 3 vapourizing furnace, is characterized in that, described first annular bellows and described 3rd annular bellows are close to.
7. flash many storehouses according to claim 1 vapourizing furnace, is characterized in that, described first wall comprises annular walls and steel plate, and the inwall of described annular walls and described steel plate are by many fastener for connection, and the outer wall of described annular walls is connected with the inwall of described vapourizing furnace; Preferably, described steel plate is provided with the hole that can open and close.
8. flash many storehouses according to claim 1 vapourizing furnace, is characterized in that, described reduction zone is divided into multiple sub-storehouse along the length direction of described vapourizing furnace, and adjacent two described sub-storehouses are separated by the wall being provided with material guide hole.
9. flash many storehouses according to claim 1 vapourizing furnace, is characterized in that, described reduction zone is divided into time high temperature storehouse, heating cabinet and thermostatical storehouse along the length direction of described vapourizing furnace, is separated between two adjacent storehouses by the wall being provided with material guide hole; And be provided with heating unit in described heating cabinet; Preferably, the tail end of described thermostatical storehouse is provided with the wall of distribution material guide hole.
10. flash many storehouses according to claim 1 vapourizing furnace, it is characterized in that, described vapourizing furnace comprises fire grate, and described fire grate is obstructed by multiple T-shaped fire grate and forms; The bending end of described fire grate stalk stretches to the axle center of described vapourizing furnace, and the other end is connected with the inwall of described vapourizing furnace.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110425546A (en) * | 2019-07-03 | 2019-11-08 | 殷梅芳 | Smokeless incinerator and method |
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