CN113249131A - Pyrolysis rotary kiln - Google Patents
Pyrolysis rotary kiln Download PDFInfo
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- CN113249131A CN113249131A CN202110651468.7A CN202110651468A CN113249131A CN 113249131 A CN113249131 A CN 113249131A CN 202110651468 A CN202110651468 A CN 202110651468A CN 113249131 A CN113249131 A CN 113249131A
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- rotary kiln
- pyrolysis
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- rotary
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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
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
- C10B47/18—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion with moving charge
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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
- C10B27/00—Arrangements for withdrawal of the distillation gases
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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
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
- C10B47/28—Other processes
- C10B47/30—Other processes in rotary ovens or retorts
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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
- 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
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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
- C10B7/00—Coke ovens with mechanical conveying means for the raw material inside the oven
- C10B7/10—Coke ovens with mechanical conveying means for the raw material inside the oven with conveyor-screws
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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)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention provides a pyrolysis rotary kiln, and relates to the technical field of coal pyrolysis. The coal gas guide pipe is arranged in the area where the coal gas starts to be pyrolyzed, so that the coal gas is guided out at the low-temperature section, and the coal tar is basically discharged from the coal gas guide pipe completely before the pyrolysis temperature of the rotary kiln reaches 600 ℃. Thus, secondary cracking of the coal tar in the temperature rise section of the rotary kiln is avoided, and the oil yield is improved. When the material reaches the coal gas pyrolysis temperature at the maximum oil yield, the coal gas generated by pyrolysis can rapidly flow along the coal gas guide pipe and converge to a relatively low-temperature position, and the coal gas is not cracked at the low-temperature position, so that the yield of coal tar is maximized.
Description
Technical Field
The invention relates to the technical field of coal pyrolysis, in particular to a pyrolysis rotary kiln.
Background
Currently, coal pyrolysis is a key step in coal conversion, and coal gasification, liquefaction, coking, and combustion all undergo or undergo pyrolysis processes. Coal tar is a black or blackish brown viscous liquid with pungent odor produced during coal dry distillation, is a complex mixture of high-aromatic hydrocarbon, and is an important raw material for organic chemical industry. The tar yield of the existing coal pyrolysis equipment is generally low.
In view of this, the invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a pyrolysis rotary kiln to solve the problem of low tar yield.
The invention is realized by the following steps:
the invention provides a pyrolysis rotary kiln which comprises a rotary kiln shell and a blanking cover sleeved at the discharge end of the rotary kiln shell, wherein a first gap is formed between the blanking cover and the outer wall of the rotary kiln shell so that the rotary kiln shell rotates relative to the blanking cover, a coal gas guide pipe is arranged in the rotary kiln shell, the gas inlet end of the coal gas guide pipe extends into a coal pyrolysis starting area in the rotary kiln, the gas outlet end of the coal gas guide pipe penetrates through the blanking cover, and the blanking cover is connected with the outer wall of the coal gas guide pipe in a rotating and sealing mode.
The rotary kiln shell is internally provided with a smoke heating pipeline, the air inlet end of the smoke heating pipeline is communicated with a hot air cover smoke distribution chamber which is arranged outside the rotary kiln shell, the waste gas end of the smoke heating pipeline is communicated with a waste gas collection chamber arranged at the feed end of the rotary kiln, the smoke heating pipeline is adjacent and fixedly connected with the inner peripheral wall of the rotary kiln shell through the supporting seat, and the hot air cover smoke distribution chamber is positioned at the discharge end of the rotary kiln shell and leaves a second gap with the outer wall of the rotary kiln shell.
The inventor finds that the reason for the low coal tar yield of the rotary kiln equipment is that: the coal gas is easy to be cracked for the second time in the temperature rising section, so that the derived coal gas can not reach the oil yield of higher level. The coal gas guide pipe is arranged in the area where the coal gas starts to be pyrolyzed, so that the coal gas is guided out at the low-temperature section, and the coal tar is basically discharged from the coal gas guide pipe completely before the pyrolysis temperature of the rotary kiln reaches 600 ℃. Thus, secondary cracking of the coal tar in the temperature rise section of the rotary kiln is avoided, and the oil yield is improved. When the material reaches the coal gas pyrolysis temperature at the maximum oil yield, the coal gas generated by pyrolysis can rapidly flow along the coal gas guide pipe and converge to a relatively low-temperature position, and the coal gas is not cracked at the low-temperature position, so that the yield of coal tar is maximized.
The temperature of the coal pyrolysis starting area is 360 +/-50 ℃, and the highest temperature in the pyrolysis rotary kiln is 450-600 ℃. The rotary kiln can realize the quick delivery of coal gas in the area where coal starts to be pyrolyzed. With the increase of the highest temperature of the pyrolysis kiln and the arrangement of a gas guide pipe, the yield of the coal tar and the density of the coal tar can be greatly changed; the higher the highest temperature of the pyrolysis kiln is, the lower the tar yield without the gas guide pipe is, and the higher the density of the coal tar is, and on the contrary, the higher the tar yield with the gas guide pipe is, and the lower the density of the coal tar is.
In one embodiment, the discharge hood is fixed to the external fixing device, and the rotary kiln moves in a rotary manner relative to the discharge hood. The first gap is arranged to avoid abrasion of the blanking cover caused by vertical and horizontal jumping or swinging of the rotary kiln.
In one embodiment, the hot air hood flue gas distribution chamber is fixed differently from the outside, and the rotary kiln moves rotationally relative to the hot air hood flue gas distribution chamber. The second gap is arranged to avoid the abrasion of the smoke distribution chamber of the hot air hood caused by the vertical and horizontal jumping or swinging of the rotary kiln. The hot air cover smoke distribution chamber is used for uniformly distributing hot air in the combustion chamber. The hot air hood smoke distribution chamber is arranged around the periphery of the rotary kiln shell.
It should be noted that, the first gap and the second gap can be adaptively set according to the actual pyrolysis requirement.
In one embodiment, the supporting base is a supporting frame, a supporting rod or a supporting plate, for example, a plurality of supporting steel plates are welded to the outer circumferential wall of the gas guiding pipe by welding, and a plurality of mounting holes are formed in the supporting steel plates for mounting the heating pipes.
In a preferred embodiment of the invention, the exhaust gas collection chamber is arranged in a cavity at the feed end of the rotary kiln, a plurality of first exhaust gas outlets are arranged on a rotary kiln shell where the exhaust gas collection chamber is positioned, the first exhaust gas outlets are inwards communicated with the exhaust gas collection chamber, and the first exhaust gas outlets are outwards communicated with an exhaust gas hood arranged outside the rotary kiln shell.
First waste gas export is close to the feed end, and the figure and the size of first waste gas export can set up according to the demand of waste gas collection.
In a preferred embodiment of the present invention, the exhaust hood has a housing, and at least one second exhaust outlet is disposed on the housing of the exhaust hood, and the second exhaust outlet is communicated with the interior of the exhaust hood. The second exhaust gas outlet is provided to minimize the number of outlets for the exhaust gas to be centrally treated.
In a preferred embodiment of the present invention, the exhaust gas hood and the rotary kiln shell have a third gap so that the rotary kiln shell rotates relative to the exhaust gas hood. In one embodiment, the exhaust hood is stationary with respect to the environment, and in use, the rotary kiln is rotated relative to the exhaust hood. Similarly, the third gap is used for meeting the requirements of up-down and left-right displacement of the rotary kiln.
In a preferred embodiment of the present invention, a plurality of hot air distribution holes are uniformly distributed on the outer peripheral wall of the rotary kiln shell, and the hot air distribution holes are circumferentially distributed on the rotary kiln shell within the range of the hot air hood flue gas distribution chamber and are communicated with the heating pipeline. The hot air distribution holes promote the uniform distribution of hot air, thereby being beneficial to the full pyrolysis of coal and improving the yield of coal tar.
In one embodiment, the heating pipeline is a plurality of heating pipelines, and the plurality of heating pipelines are annularly arranged in the rotary kiln. The heating pipelines are uniformly arranged in the rotary kiln.
In a preferred embodiment of the present invention, the flue gas distribution chamber of the hot air hood is communicated with a combustion chamber disposed outside the shell of the rotary kiln through a pipeline.
In a preferred embodiment of the present invention, the feeding cover has a feeding opening.
In a preferred embodiment of the invention, the periphery of the gas guide pipe is provided with a spiral material conveying blade; the gas guide pipe is fixedly connected with the inner peripheral wall of the rotary kiln shell through the supporting seat.
The spiral material conveying blade comprises a plurality of sections of spiral blade segments, and a gap is formed between every two adjacent sections of spiral blade segments.
In the preferred embodiment of the present invention, the gap is a fourth gap between two adjacent spiral blade segments in the spiral direction, and the main purpose is to prevent the blade from deforming or welding due to expansion and contraction.
In a preferred embodiment of the present invention, the gap is a fifth gap in the material conveying direction, where two adjacent spiral blade segments have an overlapping portion in the spiral direction. Setting a fifth gap: firstly, guarantee the incessant of screw propulsion material, secondly prevent expend with heat and contract with cold and lead to blade deformation or desoldering.
Compared with the prior art, the invention has the beneficial effects that:
the coal gas guide pipe is arranged in the area where the coal gas starts to be pyrolyzed, so that the coal gas is guided out at the low-temperature section, and the coal tar is basically discharged from the coal gas guide pipe completely before the pyrolysis temperature of the rotary kiln reaches 600 ℃. Thus, secondary cracking of the coal tar in the temperature rise section of the rotary kiln is avoided, and the oil yield is improved. When the material reaches the coal gas pyrolysis temperature at the maximum oil yield, the coal gas generated by pyrolysis can rapidly flow along the coal gas guide pipe and converge to a relatively low-temperature position, and the coal gas is not cracked at the low-temperature position, so that the yield of coal tar is maximized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic longitudinal sectional view of a rotary kiln provided in example 1;
fig. 2 is a schematic longitudinal sectional view of a rotary kiln provided in example 2.
Icon: 1-a rotary kiln shell; 2-material inlet; 3, blanking cover; 4-material outlet; 5-hot air hood smoke distribution chamber; 6-a combustion chamber; 7-flue gas heating pipeline; 8, collecting the waste gas; 9-exhaust hood; 10-hot air distribution holes; 11-a first exhaust gas outlet; 12-a second exhaust gas outlet; 13-gas transportation honeycomb duct; 14-gas inlet; 15-gas outlet; 16-screw conveying material blades; 17-helical leaf segment; 18-support seat.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention usually place when in use, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1, the embodiment provides a pyrolysis rotary kiln, which includes a rotary kiln shell 1 and a discharging cover 3 sleeved at a discharging end of the rotary kiln shell 1, wherein a first gap is formed between the discharging cover 3 and an outer wall of the rotary kiln shell 1, so that the rotary kiln shell 1 rotates relative to the discharging cover 3, the discharging cover 3 is fixed to an outside, and a material outlet 4 is disposed below the discharging cover 3.
A gas guide pipe (namely a gas transmission guide pipe 13) is arranged in the rotary kiln shell 1, a gas inlet 14 of the gas guide pipe extends into a coal pyrolysis starting area (the temperature is 360 +/-50 ℃, in the embodiment, the temperature is set in the area near the coal pyrolysis starting area of 310 ℃ in the pyrolysis rotary kiln), the highest temperature in the pyrolysis rotary kiln is 600 ℃, the gas outlet end of the gas guide pipe penetrates through the blanking cover 3 and is discharged from a gas outlet 15, and the blanking cover 3 is connected with the outer wall of the gas guide pipe in a rotating and sealing mode. The periphery of the gas guide pipe is provided with a spiral material conveying blade which conveys materials from the material inlet 2 to the discharge end.
The screw conveying material blade 16 includes a plurality of screw blade sections 17 having the same rotation direction, and the plurality of screw blade sections 17 are arranged in such a manner that a gap a is provided between one screw blade section 17 and the other screw blade section 17 in the screw direction (refer to fig. 1, that is, a fourth gap). The multi-section spiral blade section 17 is arranged at discontinuous intervals, and the main purpose is to prevent the blade from deforming or welding off caused by thermal expansion and contraction.
The gas guide pipe is fixedly connected with the inner peripheral wall of the rotary kiln shell 1 through a plurality of uniformly distributed supporting seats 18. The support seat 18 can support the flue gas heating pipeline 7 and can also support the gas transmission flow guide pipe 13. The arrangement simplifies the processing difficulty of the pyrolysis rotary kiln and increases the conveying amount and the conveying speed of materials.
Still be provided with flue gas heating tube 7 in the rotary kiln casing 1, the inlet end of flue gas heating tube 7 and the outer hot-blast cover flue gas distribution chamber 5 intercommunication at rotary kiln casing 1 of setting up, the waste gas end of flue gas heating tube 7 and the waste gas collection chamber 8 intercommunication of setting at the rotary kiln feed end, flue gas heating tube passes through supporting seat 18 and rotary kiln casing 1's internal perisporium fixed connection, hot-blast cover flue gas distribution chamber 5 is located rotary kiln casing 1 discharge end and leaves the second clearance with the outer wall of rotary kiln casing 1. The hot air cover smoke distribution chamber 5 is communicated with a combustion chamber 6 which is arranged outside the rotary kiln shell 1.
The waste gas collection chamber 8 is arranged in a cavity at the feed end of the rotary kiln, a plurality of first waste gas outlets 11 are formed in the rotary kiln shell 1 where the waste gas collection chamber 8 is located, the first waste gas outlets 11 are communicated with the waste gas collection chamber 8 inwards, and the first waste gas outlets 11 are communicated with a waste gas hood 9 arranged outside the rotary kiln shell 1 outwards. The first waste gas outlet 11 is close to the feed end, and the number and the size of the first waste gas outlet 11 can be set according to the requirement of waste gas collection.
The exhaust hood 9 has a housing, at least one second exhaust outlet 12 is opened on the housing of the exhaust hood 9, and the second exhaust outlet 12 is communicated with the inside of the exhaust hood 9.
In the preferred embodiment of the present invention, the exhaust hood 9 and the rotary kiln shell 1 have a third clearance so that the rotary kiln shell 1 can rotate relative to the exhaust hood 9. In one embodiment, the exhaust hood 9 is stationary with respect to the environment, and in use, the rotary kiln is rotated relative to the exhaust hood 9. Similarly, the third gap is used for meeting the requirements of up-down and left-right displacement of the rotary kiln.
A plurality of hot air distribution holes 10 are uniformly distributed on the peripheral wall of the rotary kiln shell 1, the hot air distribution holes 10 are circumferentially distributed on the rotary kiln shell within the range of the hot air cover flue gas distribution chamber 5, and the hot air distribution holes 10 are communicated with the heating pipeline. The hot air distribution holes 10 promote the uniform distribution of hot air, are favorable for the full pyrolysis of coal, and improve the yield of coal tar.
When the highest temperature in the pyrolysis rotary kiln is 600 ℃, taking Shenmu coal as an example, and no gas guide pipe is added, the yield of the produced coal tar is 8 percent of that of dry base coal, and the density of the coal tar is more than 80 percent and is 1.06-1.08 g/cm3(ii) a The yield of the produced coal tar is 10.2 percent of that of dry base coal by adding the gas guide pipe, and the density of the coal tar is more than 50 percent and is less than 1.00g/cm3。
Example 2
The difference from the embodiment 1 is only that the gas inlet 14 of the gas transmission guide pipe 13 guides the gas to the area near the beginning of pyrolysis of the coal at 410 ℃ in the pyrolysis rotary kiln, and the maximum temperature in the pyrolysis rotary kiln is 450 ℃. Between the plurality of helical blade sections 17, a first helical blade section 17 and another helical blade section 17 are arranged with an overlapping portion b, but with a gap c (i.e., a fifth gap) in the horizontal direction (i.e., the material conveying direction) (see fig. 2).
When the maximum temperature in the pyrolysis rotary kiln is 450 ℃, taking the shenmuke as an example, but not taking the shenmuke as an exampleThe yield of the produced coal tar is 9 percent of that of dry base coal by adding the gas guide pipe, and the density of the coal tar is more than 50 percent and is 1.06-1.08 g/cm3(ii) a The yield of the produced coal tar is 10.5 percent of that of dry base coal by adding the gas guide pipe, and the density of the coal tar is more than 60 percent and is less than 1.00g/cm3。
The arrangement helps to ensure that the spiral propelling material is uninterrupted, and can also prevent the blade from deforming or welding off caused by thermal expansion and cold contraction.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A pyrolysis rotary kiln is characterized by comprising a rotary kiln shell and a discharging cover sleeved at the discharging end of the rotary kiln shell, wherein a first gap is formed between the discharging cover and the outer wall of the rotary kiln shell, so that the rotary kiln shell rotates relative to the discharging cover, a coal gas guide pipe is arranged in the rotary kiln shell, the gas inlet end of the coal gas guide pipe extends into a coal pyrolysis starting area in the rotary kiln, the gas outlet end of the coal gas guide pipe penetrates through the discharging cover, and the discharging cover is connected with the outer wall of the coal gas guide pipe in a rotating and sealing mode.
2. The pyrolysis rotary kiln as claimed in claim 1, wherein a flue gas heating pipe is further arranged in the rotary kiln shell, an air inlet end of the flue gas heating pipe is communicated with a hot air hood flue gas distribution chamber arranged outside the rotary kiln shell, an exhaust end of the flue gas heating pipe is communicated with an exhaust gas collection chamber arranged at an air inlet end of the rotary kiln, the flue gas heating pipe is fixedly connected with the inner peripheral wall of the rotary kiln shell through a support seat, and the hot air hood flue gas distribution chamber is located at an outlet end of the rotary kiln shell and is spaced from the outer wall of the rotary kiln shell by a second gap.
3. The rotary pyrolysis kiln as claimed in claim 2, wherein the exhaust gas collection chamber is arranged in a chamber at a feed end of the rotary kiln, a plurality of first exhaust gas outlets are formed in a rotary kiln shell where the exhaust gas collection chamber is located, the first exhaust gas outlets are communicated with the exhaust gas collection chamber inwards, and the first exhaust gas outlets are communicated with an exhaust gas hood arranged outside the rotary kiln shell outwards.
4. The rotary pyrolysis kiln as claimed in claim 3, wherein the waste gas hood has a housing, at least one second waste gas outlet is provided in the housing of the waste gas hood, and the second waste gas outlet is communicated with the interior of the waste gas hood.
5. The pyrolysis rotary kiln of claim 4, wherein the waste gas hood has a third clearance with the rotary kiln shell to allow the rotary kiln shell to rotate relative to the waste gas hood.
6. The rotary pyrolysis kiln as claimed in claim 2, wherein a plurality of hot air distribution holes are uniformly distributed on the outer peripheral wall of the rotary kiln shell, the hot air distribution holes are circumferentially distributed on the rotary kiln shell within the range of the hot air hood flue gas distribution chamber, and the hot air distribution holes are communicated with the heating pipeline.
7. The rotary pyrolysis kiln as claimed in claim 6, wherein the hot air hood flue gas distribution chamber is communicated with a combustion chamber arranged outside the rotary kiln shell.
8. The rotary pyrolysis kiln as claimed in claim 1, wherein the gas guide pipe is provided at its outer periphery with a screw material conveying blade; the gas guide pipe is fixedly connected with the inner peripheral wall of the rotary kiln shell through a supporting seat;
the spiral material conveying blade comprises a plurality of sections of spiral blade segments, and a gap is formed between every two adjacent sections of spiral blade segments.
9. The rotary pyrolysis kiln as claimed in claim 8, wherein the gap means that adjacent two segments of the spiral blade segment have a fourth gap in the spiral direction.
10. The rotary pyrolysis kiln according to claim 8, wherein the gap means that two adjacent spiral blade sections have an overlapping portion in a spiral direction and a fifth gap in a conveying material direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110651468.7A CN113249131A (en) | 2021-06-10 | 2021-06-10 | Pyrolysis rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110651468.7A CN113249131A (en) | 2021-06-10 | 2021-06-10 | Pyrolysis rotary kiln |
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| Publication Number | Publication Date |
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| CN113249131A true CN113249131A (en) | 2021-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110651468.7A Pending CN113249131A (en) | 2021-06-10 | 2021-06-10 | Pyrolysis rotary kiln |
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2021
- 2021-06-10 CN CN202110651468.7A patent/CN113249131A/en active Pending
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