CN107099309B - Pyrolysis reactor and pyrolysis method thereof - Google Patents
Pyrolysis reactor and pyrolysis method thereof Download PDFInfo
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- CN107099309B CN107099309B CN201710496637.8A CN201710496637A CN107099309B CN 107099309 B CN107099309 B CN 107099309B CN 201710496637 A CN201710496637 A CN 201710496637A CN 107099309 B CN107099309 B CN 107099309B
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 225
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 133
- 239000000463 material Substances 0.000 claims abstract description 77
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims description 38
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 239000011810 insulating material Substances 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 11
- 239000012265 solid product Substances 0.000 description 28
- 239000007789 gas Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 7
- 239000003077 lignite Substances 0.000 description 7
- 239000003245 coal Substances 0.000 description 6
- 239000004215 Carbon black (E152) Substances 0.000 description 5
- 229930195733 hydrocarbon Natural products 0.000 description 5
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
- C10B47/28—Other processes
- C10B47/32—Other processes in ovens with mechanical conveying means
- C10B47/44—Other processes in ovens with mechanical conveying means with conveyor-screws
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses a pyrolysis reactor and a pyrolysis method thereof, wherein the pyrolysis reactor comprises: the pyrolysis furnace body is provided with a first feed inlet; the heating pipe stretches into the pyrolysis furnace body to provide pyrolysis heat for materials in the pyrolysis furnace body; mixing element, mixing element include one mix furnace body and agitator, mix the furnace body establish in pyrolysis furnace body's below and with pyrolysis furnace body intercommunication, be equipped with the discharge gate on the mixing furnace body, the agitator is including stretching into the (mixing) shaft in the mixing furnace body, the second feed inlet is established on pyrolysis furnace body or mixing furnace body, the second feed inlet is located between the upper end of heating pipe and (mixing) shaft, the (mixing) shaft rotates in order to mix the material of discharging into the (mixing) furnace body from pyrolysis furnace body and second feed inlet. The pyrolysis reactor can reduce the energy consumption of a system and improve the yield of pyrolysis tar. Meanwhile, the structure is simple, the occupied area can be reduced to a certain extent, and industrialization is easy to realize.
Description
Technical Field
The invention relates to the technical field of high-temperature air combustion, in particular to a pyrolysis reactor and a pyrolysis method thereof.
Background
The pyrolysis reactor of the related art has high system energy consumption, and the solid products generated after pyrolysis of the materials in the pyrolysis reactor have high sensible heat per se, and the pyrolysis process and the pyrolysis reactor of the related art waste the sensible heat of the solid products greatly, thereby causing energy loss.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the pyrolysis reactor, which can reduce the energy consumption of a system and improve the yield of pyrolysis tar. Meanwhile, the structure is simple, the occupied area can be reduced to a certain extent, and industrialization is easy to realize.
The invention also provides a pyrolysis method of the pyrolysis reactor.
A pyrolysis reactor according to an embodiment of the present invention, having a first feed port and a second feed port, comprises: the pyrolysis furnace body is provided with a first feeding hole; the heating pipe stretches into the pyrolysis furnace body to provide pyrolysis heat for materials in the pyrolysis furnace body; the mixing component comprises a mixing furnace body and a stirrer, the mixing furnace body is arranged below the pyrolysis furnace body and is communicated with the pyrolysis furnace body, a discharge hole is formed in the mixing furnace body, the stirrer comprises a stirring shaft extending into the mixing furnace body, the second feeding hole is arranged on the pyrolysis furnace body or the mixing furnace body, the second feeding hole is arranged between the heating pipe and the stirring shaft, and the stirring shaft rotates to mix materials discharged from the pyrolysis furnace body and the second feeding hole into the mixing furnace body.
According to the pyrolysis reactor disclosed by the embodiment of the invention, by arranging the mixing component, the sensible heat of the high-temperature solid product generated after pyrolysis of the material in the pyrolysis furnace body can be fully utilized, the energy consumption of a system is effectively reduced, and the yield of pyrolysis tar is improved. Meanwhile, the structure is simple, the occupied area can be reduced to a certain extent, and industrialization is easy to realize.
According to some embodiments of the invention, the stirring shaft comprises a shaft body and a plurality of blades, each of the blades is sleeved on the shaft body, and the plurality of blades are arranged on the shaft body at intervals along the axial direction of the shaft body. Therefore, the stirring shaft has a simple structure, and is beneficial to ensuring the mixing effect of rotation of the stirring shaft on materials discharged into the mixing furnace body from the pyrolysis furnace body and the second feeding port, so that the materials discharged into the mixing furnace body from the second feeding port fully utilize sensible heat of high-temperature solid products discharged into the mixing furnace body from the pyrolysis furnace body, and further the yield of pyrolysis tar of the pyrolysis reactor is improved.
Further, the cross section of the mixing furnace body is formed in a circular shape, and the ratio between the diameter of each of the blades and the diameter of the inner peripheral wall of the mixing furnace body is 0.5 to 0.7. From this, be favorable to the solid-state product in the mixed furnace body to remove to the discharge gate in order to discharge pyrolysis reactor from the clearance between mixed furnace body and the agitator, for discharging the material in the mixed furnace body into from the second feed inlet and provide the space of pyrolysis to the yield of pyrolysis tar in the mixed furnace body has been guaranteed to a certain extent, and then the whole work efficiency of pyrolysis reactor is improved.
Specifically, the ratio of the length of the stirring shaft to the length of the mixing furnace body is 0.8-1.0. From this, can advance to guarantee to discharge from pyrolysis furnace body and second feed inlet and mix the effect of mixing of the material in the mixed furnace body, and then guarantee the yield of pyrolysis tar in the mixed furnace body.
According to some embodiments of the invention, the first longitudinal central axis of the mixing furnace body is at an angle of 10 ° -60 ° to the horizontal plane, and the second longitudinal central axis of the pyrolysis furnace body is perpendicular to the horizontal plane. Therefore, the speed of discharging the high-temperature solid products in the pyrolysis furnace body into the mixing furnace body and the speed of discharging the solid products in the mixing furnace body from the discharge port can be controlled to a certain extent, so that the materials in the pyrolysis reactor are pyrolyzed more fully. Simultaneously, the quantity of materials discharged into the mixing furnace body from the pyrolysis furnace body and the second feeding port can be controlled, so that the filling rate of the materials in the mixing furnace body is between 50% and 80%, and therefore an effective space can be provided for discharging oil gas generated after the materials in the mixing furnace body are pyrolyzed, and the yield of pyrolysis tar of the pyrolysis reactor is improved.
According to some embodiments of the invention, the central axis of rotation of the stirring shaft is parallel to the first central longitudinal axis of the mixing furnace. Thereby make pyrolysis furnace body and second feed inlet discharge to mix more evenly in the material of mixing the stove in, and then make the material of discharging into the mixing stove in from the second feed inlet pyrolysis ground more abundant.
According to some embodiments of the invention, the pyrolysis reactor further comprises two screw feeders provided at the first feed opening and the second feed opening, respectively. From this, it can be seen that external material is carried to first feed inlet and second feed inlet through two screw feeder to the feeding of material of being convenient for.
Optionally, a heat insulation material piece is arranged on the inner peripheral wall of the mixing furnace body. Thereby be favorable to avoiding discharging the heat of the solid product of high temperature in the mixed furnace body from the pyrolysis furnace body and outwards dispelling from the inner peripheral wall of mixed furnace body, and then improved the heat preservation effect of mixed furnace body, can improve the efficiency of the pyrolysis tar of the interior material of mixed furnace to a certain extent.
Specifically, the length ratio between the pyrolysis furnace body and the mixing furnace body is 1:1-3:2. Therefore, the material can be ensured to stay for 5-10 s from top to bottom in the pyrolysis furnace body so as to be more fully pyrolyzed, the efficiency of pyrolysis tar of the pyrolysis reactor is further improved, and the energy consumption of the system is reduced to a certain extent.
According to the pyrolysis method of the pyrolysis reactor, the pyrolysis reactor is the pyrolysis reactor according to the embodiment of the invention, and the pyrolysis method comprises the following steps:
s1: the material is conveyed into the pyrolysis furnace body through the first feed inlet, and the heating pipe is controlled to work so as to provide pyrolysis heat for the material in the pyrolysis furnace body;
s2: after a preset time, conveying the materials into the mixing furnace body through the second feeding hole, and controlling the stirring shaft to rotate so as to mix the materials discharged into the mixing furnace body from the pyrolysis furnace body and the second feeding hole;
s3: and discharging the pyrolyzed material out of the pyrolysis reactor through the discharge port on the mixing furnace body.
According to the pyrolysis method of the pyrolysis reactor, provided by the embodiment of the invention, the sensible heat of the high-temperature solid product generated after pyrolysis of the material in the pyrolysis furnace body can be fully utilized, so that the energy consumption of a system of the pyrolysis reactor is effectively reduced, and the yield of pyrolysis tar is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of a pyrolysis reactor according to an embodiment of the present invention;
FIG. 2 is a schematic view of a blade according to an embodiment of the invention.
Reference numerals:
a pyrolysis reactor 100;
a first feed inlet 1; a second feed inlet 2; a pyrolysis furnace body 3; a heating pipe 4; a mixing part 5; a mixing furnace body 51; a stirrer 52; a stirring shaft 521; a shaft 521a; a blade 521b; a motor 522; a discharge port 6; a screw feeder 7; a screw conveyor 8; a gas inlet 9; an air inlet 10; a flue gas outlet 11; a hydrocarbon outlet 12.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "length," "upper," "lower," "front," "horizontal," "inner," "outer," "axial," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
A pyrolysis reactor 100 according to embodiments of the present invention is described below with reference to fig. 1-2.
As shown in fig. 1 to 2, a pyrolysis reactor 100 according to an embodiment of the present invention has a first feed inlet 1 and a second feed inlet 2, and the pyrolysis reactor 100 includes: a pyrolysis furnace body 3, a heating pipe 4 and a mixing part 5.
Specifically, the first feed inlet 1 is arranged on the pyrolysis furnace body 3, and the heating pipe 4 extends into the pyrolysis furnace body 3 to provide pyrolysis heat for materials in the pyrolysis furnace body 3. Therefore, after the material enters the pyrolysis furnace body 3 through the first feed inlet 1, the heating pipe 4 in the pyrolysis furnace body 3 provides heat for the material so that the material is fully pyrolyzed in the pyrolysis furnace body 3, and oil gas and high-temperature solid products are formed after the material is pyrolyzed. It can be understood that the pyrolysis furnace body 3 is provided with the oil gas outlet 12 to lead out the oil gas generated after the pyrolysis of the materials rapidly, thereby avoiding the secondary pyrolysis of tar and improving the yield of pyrolysis tar. While the high temperature solid products remain in the pyrolysis furnace 3.
The mixing part 5 comprises a mixing furnace body 51 and a stirrer 52, the mixing furnace body 51 is arranged below the pyrolysis furnace body 3 and is communicated with the pyrolysis furnace body 3, a discharge hole 6 is formed in the mixing furnace body 51, the stirrer 52 comprises a stirring shaft 521 extending into the mixing furnace body 51, the second feed inlet 2 is arranged on the pyrolysis furnace body 3 or the mixing furnace body 51, the second feed inlet 2 is arranged between the heating pipe 4 and the stirring shaft 521, and the stirring shaft 521 rotates to mix materials discharged into the mixing furnace body 51 from the pyrolysis furnace body 3 and the second feed inlet 2. It can be seen that the high-temperature solid product generated after pyrolysis of the material in the pyrolysis furnace 3 is discharged into the mixing furnace 51 along the pyrolysis furnace 3 and then mixed with the material entering the mixing furnace 51 from the second feeding port 2 under the stirring of the stirring shaft 521, so that the high-temperature solid product releases its sensible heat to provide heat for the material entering the mixing furnace 51 from the second feeding port 2, and the material entering the mixing furnace 51 from the second feeding port 2 absorbs heat in the mixing furnace 51 and is pyrolyzed, so that the solid product formed after pyrolysis and the solid product released its sensible heat are discharged out of the pyrolysis reactor 100 from the discharge port 6 on the mixing furnace 51. Therefore, the mixing furnace body 51 of the pyrolysis reactor 100 has no external heating source, and the sensible heat of the high-temperature solid products generated after the pyrolysis of the materials in the pyrolysis furnace body 3 is fully utilized, so that the energy consumption of the system is effectively reduced, and the yield of pyrolysis tar is improved. Meanwhile, the pyrolysis reactor 100 has a simple structure, can reduce the occupied area to a certain extent, and is easy to industrialize.
According to the pyrolysis reactor 100 provided by the embodiment of the invention, by arranging the mixing component 5, the sensible heat of the high-temperature solid products generated after pyrolysis of the materials in the pyrolysis furnace body 3 can be fully utilized, the energy consumption of a system is effectively reduced, and the yield of pyrolysis tar is improved. Meanwhile, the structure is simple, the occupied area can be reduced to a certain extent, and industrialization is easy to realize.
Optionally, the agitator 52 further comprises a motor 522, the motor 522 cooperating with the agitator shaft 521 to drive rotation of the agitator shaft 521. When the rotation speed of the motor 522 is 30r/min to 60r/min, the mixing effect of the agitator 52 on the material discharged from the pyrolysis furnace 3 and the second inlet 2 into the mixing furnace 51 can be ensured. Preferably, the rotational speed of the motor 522 is 35.5r/min-46.5r/min.
According to some embodiments of the present invention, the stirring shaft 521 includes a shaft body 521a and a plurality of blades 521b, each blade 521b is sleeved on the shaft body 521a, and the plurality of blades 521b are disposed on the shaft body 521a at intervals along an axial direction of the shaft body 521 a. It is understood that the stirring shaft 521 has a simple structure, and is beneficial to ensuring the mixing effect of the rotation of the stirring shaft 521 on the materials discharged from the pyrolysis furnace 3 and the second feeding port 2 into the mixing furnace 51, so that the materials discharged from the second feeding port 2 into the mixing furnace 51 fully utilize the sensible heat of the high-temperature solid products discharged from the pyrolysis furnace 3 into the mixing furnace 51, and further improve the yield of pyrolysis tar in the pyrolysis reactor 100.
Further, the cross section of the mixing furnace body 51 is formed in a circular shape, and when the ratio between the diameter of each vane 521b and the diameter of the inner peripheral wall of the mixing furnace body 51 is 0.5 to 0.7, solid products in the mixing furnace body 51 are advantageously moved from the gap between the mixing furnace body 51 and the agitator 52 to the discharge port 6 to be discharged out of the pyrolysis reactor 100, a pyrolysis space is provided for the materials discharged into the mixing furnace body 51 from the second feed port 2, thereby ensuring the yield of pyrolysis tar in the mixing furnace body 51 to a certain extent, and further improving the overall working efficiency of the pyrolysis reactor 100. Preferably, the ratio between the diameter of each vane 521b and the diameter of the inner peripheral wall of the mixing furnace 51 is 0.58-0.63.
Specifically, when the ratio of the length of the stirring shaft 521 to the length of the mixing furnace 51 is 0.8 to 1.0, the mixing effect of the materials discharged into the mixing furnace 51 from the pyrolysis furnace 3 and the second feed inlet 2 can be ensured, and the yield of pyrolysis tar in the mixing furnace 51 can be further ensured. Further, the ratio of the length of the stirring shaft 521 to the length of the mixing furnace 51 is 0.86 to 0.95.
Specifically, when the included angle between the first longitudinal central axis of the mixing furnace body 51 and the horizontal plane is 10 ° -60 °, and the second longitudinal central axis of the pyrolysis furnace body 3 is perpendicular to the horizontal plane, the speed of discharging the high-temperature solid products in the pyrolysis furnace body 3 into the mixing furnace body 51 and the speed of discharging the solid products in the mixing furnace body 51 from the discharge port 6 can be controlled to a certain extent, so that the pyrolysis of the materials in the pyrolysis reactor 100 is more sufficient. Meanwhile, the quantity of materials discharged into the mixing furnace body 51 from the pyrolysis furnace body 3 and the second feeding port 2 can be controlled, so that the filling rate of the materials in the mixing furnace body 51 is between 50% and 80%, and an effective space can be provided for discharging oil gas generated after the materials in the mixing furnace body 51 are pyrolyzed, and the yield of pyrolysis tar of the pyrolysis reactor 100 is improved. Further, the first longitudinal central axis of the mixing furnace body 51 forms an angle of 15.5 DEG to 32.6 DEG with the horizontal plane.
According to some embodiments of the invention, the rotational central axis of the stirring shaft 521 is parallel to the first longitudinal central axis of the mixing furnace 51. Thereby, the materials discharged into the mixing furnace body 51 from the pyrolysis furnace body 3 and the second feeding hole 2 are mixed more uniformly, and the materials discharged into the mixing furnace body 51 from the second feeding hole 2 are pyrolyzed more sufficiently. Preferably, the rotational central axis of the stirring shaft 521 coincides with the first longitudinal central axis of the mixing furnace body 51.
According to some embodiments of the invention, the pyrolysis reactor 100 further comprises two screw feeders 7, the two screw feeders 7 being provided at the first feed opening 1 and the second feed opening 2, respectively. It can be seen that the external material is conveyed to the first feed port 1 and the second feed port 2 by the two screw feeders 7, thereby facilitating the feeding of the material.
Optionally, the pyrolysis reactor 100 may further comprise a screw conveyor 8, the screw conveyor 8 being provided at the discharge opening 6. So that the solid products at the discharge port 6 can be transported to the outside of the pyrolysis reactor 100, and the solid products are prevented from accumulating at the discharge port 6 to a certain extent to block the discharge port 6.
Optionally, a heat insulating material member is provided on the inner peripheral wall of the mixing furnace body 51. Thereby being beneficial to avoiding the heat of the high-temperature solid products discharged into the mixing furnace body 51 from the pyrolysis furnace body 3 from being outwards dispersed from the inner peripheral wall of the mixing furnace body 51, further improving the heat preservation effect of the mixing furnace body 51 and improving the efficiency of pyrolysis tar of materials in the mixing furnace body 51 to a certain extent.
Alternatively, the heating tube 4 is a regenerative radiant tube. So that the heating pipe 4 has high thermal efficiency, stable operation and high reliability. It can be understood that when the heating pipe 4 is a heat accumulating radiant tube, the pyrolysis furnace body 3 is further provided with a gas inlet 9, an air inlet 10 and a flue gas outlet 11, so that the heat efficiency and the reliability in the heat accumulating radiant tube can be ensured, and the heating pipe 4 can be further ensured to provide sufficient heat for the materials in the pyrolysis furnace body 3 to be pyrolyzed. Wherein the temperature of the tube wall of the regenerative radiant tube is controlled by a gas regulating valve (not shown).
Optionally, the plurality of oil gas outlets 12 are arranged, and the plurality of oil gas outlets 12 are distributed on the side walls of the pyrolysis furnace body 3 and the mixing furnace body 51 at intervals. Thereby improving the efficiency of the oil gas outlet 12 for guiding out the oil gas, effectively avoiding the secondary cracking of tar and improving the yield of pyrolysis tar. Preferably, a plurality of hydrocarbon outlets 12 circumscribe a hydrocarbon conduit (not shown) that directs hydrocarbon to the same hydrocarbon manifold outlet (not shown). Thus, the pyrolysis reactor 100 is simple in structure and high in working efficiency.
Specifically, when the length ratio between the pyrolysis furnace body 3 and the mixing furnace body 51 is 1:1-3:2, the material can be ensured to stay in the pyrolysis furnace body from top to bottom for 5s-10s so as to be pyrolyzed more fully, thereby improving the efficiency of pyrolysis tar of the pyrolysis reactor 100 and reducing the energy consumption of the system to a certain extent.
According to a pyrolysis method of the pyrolysis reactor 100 according to an embodiment of the present invention, the pyrolysis reactor is the pyrolysis reactor 100 according to the above embodiment of the present invention, the pyrolysis method includes the steps of:
s1: the material is conveyed into the pyrolysis furnace body 3 through the first feed inlet 1, and the heating pipe 4 is controlled to work so as to provide pyrolysis heat for the material in the pyrolysis furnace body 3. So that the material entering the pyrolysis furnace body 3 from the first feed inlet 1 can be fully pyrolyzed in the pyrolysis furnace body 3, and finally oil gas and high-temperature solid products are formed.
S2: after a predetermined time, the material is fed into the mixing furnace 51 through the second feed port 2, and the stirring shaft 521 is controlled to rotate to mix the material discharged into the mixing furnace 51 from the pyrolysis furnace 3 and the second feed port 2. Thereby, the high-temperature solid product discharged from the pyrolysis furnace 3 into the mixing furnace 51 releases its own sensible heat to provide heat for the material entering the mixing furnace 51 from the second feed inlet 2, so that the material entering the mixing furnace 51 from the second feed inlet 2 absorbs heat in the mixing furnace 51 and undergoes pyrolysis.
S3: the pyrolyzed material is discharged out of the pyrolysis reactor 100 through a discharge port 6 on the mixing furnace body 51. It can be seen that the solid products formed after pyrolysis and the solid products released from the sensible heat are discharged from the discharge port 6 of the mixing furnace 51 to the pyrolysis reactor 100.
According to the pyrolysis method of the pyrolysis reactor 100, sensible heat of high-temperature solid products generated after pyrolysis of materials in the pyrolysis furnace body 3 can be fully utilized, energy consumption of a system of the pyrolysis reactor 100 is effectively reduced, and yield of pyrolysis tar is improved.
The structure of the pyrolysis reactor 100 according to one embodiment of the present invention is described in detail with reference to fig. 1 to 2. It should be noted that the following description is only exemplary, and it is obvious that after reading the following technical solutions of the present invention, one skilled in the art may combine or replace or modify some technical solutions or some technical features thereof, which also falls within the scope of protection claimed by the present invention.
As shown in fig. 1-2, a pyrolysis reactor 100 according to embodiments of the present invention has a first feed inlet 1, a second feed inlet 2, a discharge outlet 6, a gas inlet 9, an air inlet 10, a flue gas outlet 11, and an oil gas outlet 12. The pyrolysis reactor 100 further comprises: a pyrolysis furnace body 3, a heating pipe 4, a mixing component 5, a screw feeder 7 and a screw conveyor 8.
Specifically, the first feed port 1 and the second feed port 2 are both provided on the pyrolysis furnace body 3. The number of the screw feeders 7 is two, and the screw feeders are respectively arranged at the first feeding opening 1 and the second feeding opening 2. The screw conveyor 8 is one and is arranged at the discharge hole 6. The heating pipe 4 extends into the pyrolysis furnace body 3 to provide pyrolysis heat for the material in the pyrolysis furnace body 3. The heating pipe 4 is a heat accumulating radiant pipe, and the temperature of the pipe wall of the heating pipe 4 is controlled to be 900-1000 ℃ through a gas regulating valve.
The mixing section 5 includes a mixing furnace 51 having a circular cross section and a stirrer 52.
The mixing furnace body 51 is arranged below the pyrolysis furnace body 3 and is communicated with the pyrolysis furnace body 3, a discharge hole 6 is formed in the mixing furnace body 51, and a heat insulation material piece is arranged on the inner peripheral wall of the mixing furnace body 51. The length ratio between the mixing furnace body 51 and the pyrolysis furnace body 3 is 1:1. The first longitudinal central axis of the mixing furnace body 51 is at an angle of 20 ° to the horizontal, and the second longitudinal central axis of the pyrolysis furnace body 3 is perpendicular to the horizontal.
The stirrer 52 includes a stirring shaft 521 extending into the mixing furnace body 51 and a motor 522 cooperating with the stirring shaft 521 to drive the stirring shaft 521 to rotate, and the rotation speed of the motor 522 is 45r/min. The second feed opening 2 is located between the heating pipe 4 and the stirring shaft 521.
The ratio of the length of the stirring shaft 521 to the length of the mixing furnace 51 was 0.9, and the rotation center axis of the stirring shaft 521 was coincident with the first longitudinal center axis of the mixing furnace 51. The stirring shaft 521 includes a shaft body 521a and a plurality of blades 521b, each blade 521b is sleeved on the shaft body 521a to be rotated by the shaft body 521a, and the plurality of blades 521b are provided on the shaft body 521a at intervals along the axial direction of the shaft body 521 a. The ratio between the diameter of each vane 521b and the diameter of the inner peripheral wall of the mixing furnace 51 was 0.6. The motor 522 drives the stirring shaft 521 to rotate to mix the materials discharged from the pyrolysis furnace 3 and the second feed inlet 2 into the mixing furnace 51.
The pyrolysis reactor 100 according to the embodiment of the present invention was used to pyrolyze indonesian lignite (coal quality analysis is shown in table 1) and Wen Jialiang long flame lignite (coal quality analysis is shown in table 2), wherein the material entering the pyrolysis furnace 3 from the first feed inlet 1 is indonesian lignite, the material discharged from the second feed inlet 2 into the mixing furnace 51 is Wen Jialiang long flame lignite, and the yield distribution of pyrolysis tar obtained after pyrolysis is shown in table 3.
Table 1: indonesia lignite coal quality analysis
Table 2: wen Jialiang long flame coal quality analysis
Table 3: pyrolysis yield distribution of Indonesia lignite and Wen Jialiang long flame coal
As can be seen from Table 3, the Indonesia lignite is pyrolyzed in the pyrolysis furnace body 3 of the pyrolysis reactor 100, the temperature-home beam long flame coal is pyrolyzed in the mixing furnace body 51, the tar yield of the pyrolysis product is as high as 8.2%, the tar yield is 96.5% of the oil content of an aluminum retort, and the energy consumption of the system is reduced by 10-25%.
Other configurations and operations of pyrolysis reactor 100 according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. A pyrolysis reactor, wherein the pyrolysis reactor has a first feed inlet and a second feed inlet, the pyrolysis reactor comprising:
the pyrolysis furnace body is provided with a first feeding hole;
the heating pipe stretches into the pyrolysis furnace body to provide pyrolysis heat for materials in the pyrolysis furnace body;
the mixing component comprises a mixing furnace body and a stirrer, the mixing furnace body is arranged below the pyrolysis furnace body and is communicated with the pyrolysis furnace body, a discharge hole is formed in the mixing furnace body, the stirrer comprises a stirring shaft extending into the mixing furnace body, the second feed inlet is arranged on the pyrolysis furnace body or the mixing furnace body, the second feed inlet is arranged between the heating pipe and the stirring shaft, and the stirring shaft rotates to mix materials discharged into the mixing furnace body from the pyrolysis furnace body and the second feed inlet;
the stirring shaft comprises a shaft body and a plurality of blades, each blade is sleeved on the shaft body, and the blades are arranged on the shaft body at intervals along the axial direction of the shaft body;
wherein the ratio of the length of the stirring shaft to the length of the mixing furnace body is 0.8-1.0.
2. The pyrolysis reactor of claim 1 wherein the cross-section of the mixing furnace is circular, the ratio between the diameter of each of the vanes and the diameter of the inner peripheral wall of the mixing furnace being 0.5-0.7.
3. The pyrolysis reactor of claim 1 wherein the first longitudinal central axis of the mixing furnace is at an angle of 10 ° -60 ° to the horizontal and the second longitudinal central axis of the pyrolysis furnace is perpendicular to the horizontal.
4. The pyrolysis reactor of claim 1 wherein the central axis of rotation of the stirring shaft is parallel to the first longitudinal central axis of the mixing furnace.
5. The pyrolysis reactor of claim 1 further comprising two screw feeders disposed at the first feed opening and the second feed opening, respectively.
6. The pyrolysis reactor of claim 1, wherein the inner peripheral wall of the mixing furnace body is provided with a heat insulating material piece.
7. The pyrolysis reactor of any one of claims 1 to 6 wherein the length ratio between the pyrolysis furnace and the mixing furnace is 1:1 to 3:2.
8. A pyrolysis method of a pyrolysis reactor, characterized in that the pyrolysis reactor is a pyrolysis reactor according to any one of claims 1-7, the pyrolysis method comprising the steps of:
the material is conveyed into the pyrolysis furnace body through the first feed inlet, and the heating pipe is controlled to work so as to provide pyrolysis heat for the material in the pyrolysis furnace body;
after a preset time, conveying the materials into the mixing furnace body through the second feeding hole, and controlling the stirring shaft to rotate so as to mix the materials discharged into the mixing furnace body from the pyrolysis furnace body and the second feeding hole;
and discharging the pyrolyzed material out of the pyrolysis reactor through the discharge port on the mixing furnace body.
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