WO2018107663A1 - 物料加热装置 - Google Patents

物料加热装置 Download PDF

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Publication number
WO2018107663A1
WO2018107663A1 PCT/CN2017/085425 CN2017085425W WO2018107663A1 WO 2018107663 A1 WO2018107663 A1 WO 2018107663A1 CN 2017085425 W CN2017085425 W CN 2017085425W WO 2018107663 A1 WO2018107663 A1 WO 2018107663A1
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WO
WIPO (PCT)
Prior art keywords
rotary kiln
heat exchange
exchange tube
heat
hood
Prior art date
Application number
PCT/CN2017/085425
Other languages
English (en)
French (fr)
Inventor
朱书红
Original Assignee
朱书红
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 朱书红 filed Critical 朱书红
Priority to JP2019502137A priority Critical patent/JP6837124B2/ja
Priority to AU2017374532A priority patent/AU2017374532B2/en
Priority to RU2019101121A priority patent/RU2715186C1/ru
Priority to CA3020977A priority patent/CA3020977C/en
Priority to UAA201900769A priority patent/UA125175C2/uk
Priority to EP17881740.9A priority patent/EP3553440B1/en
Priority to KR1020187027940A priority patent/KR102151863B1/ko
Publication of WO2018107663A1 publication Critical patent/WO2018107663A1/zh
Priority to US16/185,424 priority patent/US10604705B2/en
Priority to ZA2018/07791A priority patent/ZA201807791B/en

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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
    • C10B5/00—Coke ovens with horizontal chambers
    • C10B5/10—Coke ovens with horizontal chambers with heat-exchange devices
    • 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
    • C10B27/06—Conduit details, e.g. valves
    • 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
    • C10B41/00—Safety devices, e.g. signalling or controlling devices for use in the discharge of coke
    • 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
    • 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
    • C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
    • 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
    • C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
    • 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
    • C10B57/14—Features of low-temperature carbonising processes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/14—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/2016—Arrangements of preheating devices for the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/34—Arrangements of heating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/36—Arrangements of air or gas supply devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/42—Arrangement of controlling, monitoring, alarm or like devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/36—Arrangements of air or gas supply devices
    • F27B7/362—Introducing gas into the drum axially or through the wall
    • F27B2007/365—Introducing gas into the drum axially or through the wall longitudinally
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/10—Biofuels, e.g. bio-diesel

Definitions

  • the invention relates to the technical field of a rotary kiln heating device, in particular to a material heating device for coal or biomass pyrolysis.
  • the medium-low temperature dry distillation of coal is more common in the internal heat type shaft furnace. Because of its simple structure, low cost and wide application, the internal heat type shaft furnace has the biggest disadvantage of mixing gas and flame gas. Together, the gas calorific value is low.
  • a kiln body is provided with a flame gas pipe heating mechanism, and a coal material propelling decomposition channel formed between the flame gas pipe heating mechanism and the inner wall of the kiln, wherein the kiln body is provided with coal decomposition gas connected with the coal material propelling decomposition channel Collection tube; publication number: CN101985565A, invention patent of coal material multi-burner sub-mother tube separation device, the patent discloses a coal material multi-burner sub-mother tube separation device,
  • the utility model comprises a horizontally arranged sealing rotary body, wherein the rotary boring body is provided with a close-packed burner, and one end of the close-packing burner is connected with a corresponding close-in gas-intake pipe and a close-in air intake pipe, and the gas inlet pipe is included a cavity, an air intake pipe is disposed in the outer cavity, and the other end is provided with a close-dissipation heat pipe, and the cavity formed between the close-in burner, the close-in air intake
  • the dust removal liquefaction mechanism is connected. All of the above three patents separate the gas produced by coal pyrolysis from the heat generated by heating, and have the characteristics of energy saving and emission reduction. However, these three patents also have a common weakness: the combustion mechanism or the heating mechanism is disposed in the kiln. This weakness is reflected in the fact that the combustion condition is difficult to observe, the combustion mechanism is difficult to repair and maintain, and the combustion medium is difficult to use pulverized coal. Otherwise, it is easy to block the heat dissipation pipe.
  • a material heating device including a rotary kiln, a plurality of heat exchange tubes, a hot hood, a high temperature gas input mechanism, an exhaust gas plenum, an exhaust gas output pipe
  • the rotary kiln has a feeding end and a discharging end
  • the heat exchange tube is disposed in the rotary kiln, and is uniformly distributed in the circumferential direction and adjacent a heat exchange tube bracket is disposed on the inner wall of the rotary kiln, and an insulation layer is disposed on the wall of the rotary kiln
  • a space between the heat exchange tube and the rotary kiln is a passage of materials
  • the hot hood is disposed at a rotation
  • An outer circumference of the kiln shell, the inlet end of the heat exchange tube is in communication with the hot hood, the heat exchange tube and the hot hood connection portion are connected by an elbow, the elbow is a part of the heat exchange tube, the
  • the inner wall of the rotary kiln is provided with an insulation layer, and the inner wall of the partial rotary kiln formed by the connection between the inlet end of the heat exchange tube and the outer portion of the rotary kiln is not provided with an insulation layer.
  • the outer side of the rotary kiln casing is provided with an insulation ring
  • the heat insulation ring and the outer casing of the rotary kiln are provided with an insulated air gap, and the air gap is open to the atmosphere to serve as a cooling and heat insulation ring.
  • a corresponding rotary kiln shell, the elbow end of the heat exchange tube is connected to the heat insulation ring through an outer casing of the rotary kiln, and the hot hood and the heat insulation ring enclose a hot air distribution chamber, the hot air hood A refractory layer is disposed on the indoor side of the hot air distribution enclosed by the heat insulating ring.
  • the heat exchange tube is made of heat-resistant steel.
  • the heat-resistant steel is 0Cr25Ni20.
  • the hot hood is located in the middle of the rotary kiln near the discharge end.
  • the heat exchange tubes are arranged directly from the hot hood portion to the feed end of the rotary kiln.
  • the heat exchange tube can also be arranged first to the discharge end and then to 180 ° C in the direction of the feed end.
  • the hot hood and the high temperature gas input mechanism may be one set or two or three sets.
  • the rotary kiln is provided with a plurality of material temperature detecting devices and a plurality of heat exchange tube temperature detecting devices, and controls combustion of the high temperature gas input mechanism by a plurality of material temperature detecting and/or feedback of a plurality of heat exchange tube temperature detecting devices. Or the speed of the rotary kiln, so as to effectively control the temperature inside the rotary kiln.
  • the hot hood is disposed on the outer circumference of the rotary kiln shell, and the hot hood serves as a distribution function of the heating gas.
  • the heat distribution of each heat exchange tube connected to the hot hood is basically Consistently, the heat exchange between the exchange tubes and the materials is correspondingly uniform.
  • the pyrolysis of the coal pyrolysis in the corresponding section along the axis of the rotary kiln is uniform, and all parts inside and outside the heat exchange tubes are separated.
  • the mechanism should also absorb heat from the material, the effective utilization rate of the equipment will be significantly reduced, the expansion and contraction of the heat pipe is inconsistent, the internal thermal stress of the equipment is large, and the equipment life is short; the inner wall of the rotary kiln is provided with heat insulation and insulation layer to make the thermal efficiency of the rotary kiln High, rotary kiln shell temperature is low, safe and reliable.
  • the hot hood is not a place where heat is directly generated. It is transmitted by the heat generated by the combustion of the high-temperature gas input mechanism. The high-temperature gas input mechanism is outside the kiln, and the burning condition is easily observed. The burner is relatively easy to be repaired, maintained and maintained.
  • connection between the heat exchange tube and the hot hood is connected by an elbow: first, in order to connect the two directly through the elbow, the connection can be smoothly realized; and second, the high temperature gas smoothly makes a 90 degree turn through the elbow, and The 90 degree elbow is easy to realize the processing and on-site construction of the phase difference of 90 degrees.
  • the heat insulation layer is arranged to transfer heat to the kiln shell with as little heat as possible in the rotary kiln to reduce heat loss, and a partial rotation formed at the connection end of the heat exchange tube inlet elbow end and the rotary kiln shell
  • the inner wall of the kiln is not provided with insulation layer, which is used for the heat transfer from the hot air distribution chamber to the rotary kiln shell.
  • the heat exchange between the material and the outer casing is performed as soon as possible, and the rotary kiln shell at the hot air distribution chamber is cooled to increase the strength of the rotary kiln casing.
  • the function of the heat insulation ring of the rotary kiln shell is: by providing the heat insulation ring, the heat of the hot air hood can not be directly transmitted to the kiln body shell, and the kiln shell of the heat insulation ring part is obtained here, the heat insulation ring and the kiln
  • the cooling of the air or water by the gap formed by the body shell reduces the temperature of the kiln shell at the portion and reduces the strength reduction effect of the high temperature on the kiln shell.
  • 0Cr25Ni20 heat-resistant steel for heat exchange tubes is used for heat exchange systems to obtain a longer service life.
  • a refractory material is disposed on the heat distribution indoor side surrounded by the hot hood and the rotary kiln shell or the hot hood and the heat insulating ring, in order to reduce heat loss, and protect the hot hood, the rotary kiln shell and the heat insulating ring.
  • the heat exchange tube is first arranged for a section to the discharge end, and then rotated 180 ° C to the feed end direction has two important meanings: First, it is beneficial to coal pyrolysis in the rotating part, the temperature reaches a uniform, coal fast The pyrolysis and temperature distribution characteristics of the highest oil production rate; the second is to adjust the position of the hot hood where to avoid the roller.
  • Two or three hot hoods can be used to realize segment heating of the rotary kiln and temperature control in sections.
  • the rotary kiln is provided with a plurality of material temperature detecting devices and a plurality of heat exchange tube temperature detecting devices, and the combustion of the high temperature gas input mechanism can be controlled by multiple material temperature detection and/or feedback of multiple heat exchange tube temperature detections.
  • the rotation speed of the rotary kiln is effective to control the temperature in the rotary kiln to meet the temperature requirements of the process.
  • FIG. 1 is a schematic diagram of a heat hood and a rotary kiln shell enclosing a heat distribution chamber in the embodiment, wherein the heat exchange tube is disposed directly from the hot hood portion to the feed end of the rotary kiln;
  • a part of the heat exchange tube is directly from the hot hood part Arranging in the direction of the feed end of the rotary kiln, another part of the heat exchange tube may also be arranged to the discharge end first, and then turned to a schematic diagram of 180 ° C to the feed end direction;
  • FIG. 3 is a heat hood and the heat insulation ring enclose a hot air distribution chamber in the embodiment, the heat exchange tube is arranged directly from the hot hood part to the feed end of the rotary kiln, and the two hot hood sections are preheated to the rotary kiln.
  • the heat insulating ring enclose a hot air distribution chamber in the embodiment, a part of the heat exchange tube is directly arranged from the hot hood part to the feeding end of the rotary kiln, and another part of the heat exchange tube can also be discharged first.
  • the end is arranged for a section, and then turned to a 180 ° C direction to arrange the schematic direction of the feed end.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • a material heating device includes a rotary kiln 1, a plurality of heat exchange tubes 2, a hot hood 3, a high temperature gas input mechanism 4, an exhaust gas plenum 5, and an exhaust gas output pipe 6, and the rotary kiln is provided.
  • the heat exchange tube 2 and the inner cavity of the rotary kiln 1 are channels of materials.
  • the hot hood 3 is disposed on the outer circumference of the casing of the rotary kiln 1, the inlet end of the heat exchange tube 2 is in communication with the hot hood 3, and the connection portion of the heat exchange tube 2 and the hot hood 3 is connected by an elbow.
  • the elbow is a part of the heat exchange tube 2, the hot hood 3 and the outer casing of the rotary kiln 1 are enclosed by a hot air distribution chamber, and the elbow end of the heat exchange tube 2 is connected to the outer casing of the rotary kiln 1;
  • the outlet end of the heat exchange tube 2 is in communication with the exhaust gas plenum 5, the exhaust gas plenum 5 is in communication with the exhaust gas output conduit 6, and the exhaust gas collection chamber 5 is disposed at the feed end 7 of the rotary kiln 1.
  • the hot hood 3 is in communication with the high temperature gas input mechanism 4, and the outer portion of the hot hood 3 and the outer casing of the rotary kiln 1 a sealing mechanism 10 is provided.
  • the inner surface of the casing of the rotary kiln 1 is provided with an insulating layer 13, and the inner surface of the casing of the rotary kiln 1 at the portion where the inlet end of the heat exchange tube 2 is connected to the outer casing of the rotary kiln 1 is not provided with an insulating layer. .
  • the heat exchange tube 2 is made of heat-resistant steel.
  • the heat-resistant steel is 0Cr25Ni20.
  • the hot hood 3 is provided with a refractory material on the inside of the heat distribution chamber surrounded by the outer casing of the rotary kiln 2.
  • the hot hood 3 is located in the middle of the rotary kiln 1 near the discharge end 8.
  • the heat exchange tubes 2 are arranged directly from the hot hood 3 to the feed end 7 of the rotary kiln 1, and the hot hood 3 is one.
  • the rotary kiln 1 is provided with a plurality of material temperature detecting devices 14, and the combustion of the high temperature gas input mechanism 4 can be controlled by the feedback of the plurality of material temperature detecting devices 14, thereby effectively controlling the temperature in the rotary kiln to meet the process requirements. temperature.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • a material heating device including a rotary kiln 1, a plurality of heat exchange tubes 2, a hot hood 3, a high temperature gas input a mechanism 4, an exhaust gas plenum 5, an exhaust gas output pipe 6,
  • the rotary kiln 1 has a feed end 7 and a discharge end 8
  • the heat exchange tube 2 is disposed in the rotary kiln 1 and uniformly distributed in the circumferential direction
  • the heat exchange tube 2 and the inner cavity of the rotary kiln 2 are channels for processing materials
  • the hot hood 3 is disposed on the outer circumference of the casing of the rotary kiln 1, the inlet end of the heat exchange tube 2 and the hot hood 3 communicating
  • the connection portion of the heat exchange tube 2 and the hot hood 3 is connected by an elbow, the elbow is a part of the heat exchange tube 2, and the hot hood 3 and the outer casing of the rotary kiln 1 form a hot air distribution chamber.
  • An elbow end of the intake of the heat exchange tube 2 is connected to the outer casing of the rotary kiln 1; an outlet end of the heat exchange tube 2 is in communication with the exhaust gas plenum 5, the exhaust gas plenum 5 and the exhaust gas
  • the output duct 6 is in communication, the exhaust gas collection chamber 5 is disposed at the feed end 7 of the rotary kiln 1, and the hot hood 3 is in communication with the high temperature gas input mechanism 4, and the hot hood 3 and the outer casing of the rotary kiln 1
  • a sealing mechanism 10 is disposed on the outer side of the casing, and an inner surface of the casing of the rotary kiln 1 is provided with an insulation layer 13, and the inner surface of the casing of the rotary kiln 1 Insulation layer 13 is set, and the heat exchanger tube 2 in the inlet end of the elbow portion of the rotary kiln 1 is connected to the housing surface of the rotary kiln 1 is not provided within the insulation housing.
  • the heat exchange tube 2 is made of heat-resistant steel.
  • the heat-resistant steel is 0Cr25Ni20.
  • the hot hood 3 is provided with a refractory material on a heat distribution chamber side surrounded by the outer casing of the rotary kiln 1.
  • the part of the heat exchange tube 2 is arranged directly from the hot hood 3 to the feed end 7 of the rotary kiln 1, and the other part of the heat exchange tube 2 is first arranged to the discharge end 8 and then turned 180 ° C to the feed end. Arranged in 7 directions.
  • the hot hood 3 is one.
  • the rotary kiln 1 is provided with a plurality of material temperature detecting devices 14 and a plurality of heat exchange tube temperature detecting devices 15 for controlling high temperature gas input through feedback of a plurality of material temperature detecting devices 14 and a plurality of heat exchange tube temperature detecting devices 15.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the material heating device comprises a rotary kiln 1, a plurality of heat exchange tubes 2, a hot hood 3, a high temperature gas input mechanism 4, an exhaust gas plenum 5, an exhaust gas output pipe 6, and the rotary kiln has a feed.
  • the heat exchange tube 2 is disposed in the body of the rotary kiln 1 and uniformly distributed in the circumferential direction.
  • the heat exchange tube 2 and the inner cavity of the rotary kiln 2 are heated passages of materials.
  • the hot hood 3 is disposed on the outer circumference of the casing of the rotary kiln 1, the inlet end of the heat exchange tube 2 is in communication with the hot hood 3, and the connection portion of the heat exchange tube 2 and the hot hood 3 is connected by an elbow.
  • the elbow is a part of the heat exchange tube 2, and the outlet end of the heat exchange tube 2 is in communication with the exhaust gas plenum 5, and the exhaust gas collection chamber 5 is in communication with the exhaust gas output conduit 6, the exhaust gas collection chamber 5 is disposed at the feeding end 7 of the rotary kiln 1, the hot hood 3 is in communication with the high temperature gas input mechanism 4, and a sealing mechanism 10 is disposed on an outer side between the hot hood 3 and the outer casing of the rotary kiln 1, the slewing An insulating layer 13 is disposed on the inner surface of the kiln 1 housing.
  • An outer side of the outer casing of the rotary kiln 1 is provided with an insulating ring 11 and an outer casing of the rotary kiln 1
  • An air gap 12 is provided, the air gap 12 is open to the atmosphere, and serves to cool the heat insulation ring 11 and the corresponding outer casing of the rotary kiln 1 , and the elbow end of the heat exchange tube 2 penetrates the outer casing of the rotary kiln 1 Connected to the heat insulating ring 11, the hot hood 3 and the heat insulating ring 11 enclose a hot air distribution chamber.
  • the heat exchange tube 2 is made of heat-resistant steel.
  • the heat-resistant steel is 0Cr25Ni20.
  • a refractory material is disposed on the heat distribution chamber side surrounded by the hot hood 3 and the heat insulating ring 11.
  • the heat exchange tubes 2 are arranged directly from the hot hood 3 to the feed end 7 of the rotary kiln 1.
  • the hot hood 3 is two, and the segments supply heat to the rotary kiln.
  • the rotary kiln 1 is provided with a plurality of material temperature detecting devices 14 and a plurality of heat exchange tube temperature detecting devices 15, and the high temperature gas input can be controlled by feedback of a plurality of material temperature detecting devices 14 or a plurality of heat exchange tube temperature detecting devices 15.
  • the speed of the combustion of the mechanism or the rotary kiln thus effectively controlling the temperature in the rotary kiln to meet the temperature requirements of the process.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • the material heating device comprises a rotary kiln 1, a plurality of heat exchange tubes 2, a hot hood 3, a high temperature gas input mechanism 4, an exhaust gas plenum 5, and an exhaust gas output pipe 6, and the rotary kiln has a feed.
  • the heat exchange tube 2 is disposed in the rotary kiln 1 and is evenly distributed in the circumferential direction.
  • the heat exchange tube 2 and the inner cavity of the rotary kiln 2 are channels of materials.
  • the hot hood 3 is disposed on the outer circumference of the casing of the rotary kiln 1, the inlet end of the heat exchange tube 2 is in communication with the hot hood 3, and the connection portion of the heat exchange tube 2 and the hot hood 3 is connected by an elbow, the bend The head is a part of the heat exchange tube 2, and the outlet end of the heat exchange tube 2 is in communication with the exhaust gas plenum 5, and the exhaust gas collection chamber 5 is in communication with the exhaust gas output conduit 6, the exhaust gas collection chamber 5 Provided at the feed end 7 of the rotary kiln 1, the hot hood 3 is in communication with the high temperature gas input mechanism 4, and a sealing mechanism 10 is disposed on the outer side between the hot hood 3 and the outer casing of the rotary kiln 1, the rotary kiln 1
  • the inner surface of the casing is provided with an insulating layer 13.
  • An outer side of the outer casing of the rotary kiln 1 is provided with an insulating ring 11 , and the outer casing of the rotating kiln 1 and the outer casing of the rotary kiln 1 are provided with an insulated air gap 12 , and the air gap 12 is open to the atmosphere. Cooling the heat insulating ring 11 and the corresponding outer casing of the rotary kiln, the elbow end of the heat exchange tube 2 is connected to the heat insulating ring 11 through the outer casing of the rotary kiln 1, the hot hood 3 and the heat insulating ring 11 is enclosed in a hot air distribution room.
  • the heat exchange tube 2 is made of heat-resistant steel.
  • the heat-resistant steel is 0Cr25Ni20.
  • a refractory material is disposed on the heat distribution chamber side surrounded by the hot hood 3 and the heat insulating ring 11.
  • the part of the heat exchange tube 2 is arranged directly from the hot hood 3 to the feed end 7 of the rotary kiln 1, and the other part of the heat exchange tube 2 is first arranged to the discharge end 8 and then turned 180 ° C to the feed end. Arranged in 7 directions.
  • the rotary kiln is provided with a plurality of material temperature detecting devices 14 and a plurality of heat exchange tube temperature detecting devices 15, and the combustion of the high temperature gas input mechanism can be controlled by feedback of a plurality of material temperature detecting devices and a plurality of heat exchange tube temperature detecting devices.
  • the rotation speed of the rotary and rotary kiln is effective to control the temperature in the rotary kiln to meet the temperature requirements of the process.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
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Abstract

一种物料加热装置，包括回转窑（1）、多个热交换管（2）、热风罩（3）、高温气体输入机构（4）、废气集气室（5）、废气输出管道（6），回转窑（1）有进料端（7）和出料端（8），热交换管（2）在回转窑（1）内，热风罩（3）在回转窑（1）窑体外，热交换管（2）的进气端与热风罩（3）连通，热交换的出气端与废气集气室（5）连通，废气集气室（5）与废气输出管道（6）连通，热风罩（3）与高温气体输入机构（4）连通，热交换管（2）与回转窑（1）隔热保温层（13）之间空腔为物料的通道，热交换管（2）与物料直接接触，热量大部分通过传导、辐射直接传给了物料，热量损失少，同时热交换后的废气又与热解产生的煤气不接触，所产煤气洁净度高，热值高，利用价值高。

Description

物料加热装置 技术领域
本发明涉及到回转窑加热装置技术领域，具体涉及到煤或生物质热解的物料加热装置。
背景技术
在煤的热解技术领域，煤的中低温干馏比较普遍的是内热式竖炉，内热式竖炉因其结构简单、成本低、被广泛应用，然其最大的缺点是煤气与焰气混合在一起，煤气热值低，除自身热解用部分煤气外，如果不与石灰窑或发电搞联产，大部分煤气只有点天灯，不仅造成能源浪费，而且造成较大的环保污染问题；外热式炉窑相对较少，公开号为：CN101985558A，煤物质的分解设备的发明专利，该专利公开了一种煤物质的分解设备，包括一个带有进料口和出料口的密闭窑体，所述窑体内设置焰气管道加热机构，所述焰气管道加热机构与窑体内壁之间形成的煤物质推进分解通道，所述窑体上设置与煤物质推进分解通道连通的煤分解气收集管；公开号为：CN101985565A，煤物质多燃烧器子母管分离设备的发明专利，该专利公开了一种煤物质多燃烧器子母管分离设备，它包括一个横向设置的密封回转窖体，所述回转窖体内设置密排的燃烧器，所述密排燃烧器一端与对应的密排燃气进气管和密排空气进气管连接，燃气进气管在内腔，空气进气管在外腔，所述另一端设置密排散热管，所述密排燃烧器、密排空气进气管、密排散热管与回转窖体内壁之间形成的空腔为煤物质推进分离通道，所述回转窖体上设置煤分解气收集管，所述密排散热管与焰气汇集管连通，所述焰气汇集管伸出回转窖外；公开号为：CN101985566A，煤物质分解用卧式回转设备的发明专利，该专利公开了一种煤物质分解用卧式回转设备，包括一个横向的密封回转窑，所述回转窑包括一个进料口、一个出料口，所述回转窑内沿窑体方向设置一个燃烧装置，所述燃烧装置与回转窑内壁之间形成煤物质推进分离通道，所述煤物质推进分离通道与所述进料口和出料口连通，所述回转窑上进料口所在端设置煤分离出的燃气、焦油气收集管，所述煤分离出的燃气、焦油气收集管与煤物质推进分离通道连通，另一端与燃气除尘液化机构连接。上述三个专利都将煤热解产生的煤气与加热产生废气有效的进行了分离，具有节能减排的特点，但这三个专利也有一个共同弱点：燃烧机构或加热机构设置在窑体内。这一弱点体现在：燃烧状况难以观察，燃烧机构难以维修和保养，燃烧介质难以用煤粉，否则，容易堵塞散热管道。
发明内容
为解决上述问题，本发明的技术方案是：物料加热装置，包括回转窑、多个热交换管、 热风罩、高温气体输入机构、废气集气室、废气输出管道，所述回转窑有进料端和出料端，所述热交换管设置在回转窑内，沿周向均匀分布多个且邻近回转窑内壁，所述回转窑内壁上设置热交换管支架，所述回转窑壁上设置保温层，所述热交换管与回转窑之间的空间为物料的通道，所述热风罩设置在回转窑壳体外周，所述热交换管的进气端与所述热风罩连通，所述热交换管与热风罩连接部位采用弯头连接，所述弯头为热交换管的一部分，所述热交换管进气的弯头端与所述回转窑外壳连接，所述热风罩与回转窑外壳围成一个热风分配室，所述热交换管的出气端与所述废气集气室连通，所述废气集气室与所述废气输出管道连通，所述废气收集室设置在回转窑进料端，所述热风罩与所述高温气体输入机构连通，所述热风罩与所述回转窑外壳之间的外侧设置密封机构。
所述回转窑内壁设置保温层,所述热交换管进气弯头端与所述回转窑外壳连接部位所形成的局部回转窑内壁不设置保温层。
优化地，所述回转窑外壳的外侧设置了隔热环，所述隔热环与所述回转窑的外壳设置有隔热的空气间隙，所述空气间隙与大气相通，起到冷却隔热环与对应的回转窑外壳，所述热交换管的弯头端贯穿回转窑的外壳与所述隔热环连接，所述热风罩与所述隔热环围成一个热风分配室，所述热风罩与所述隔热环所围成的热风分配室内侧设置耐火材料层。
所述热交换管的材质为耐热钢，优化地，所述耐热钢为0Cr25Ni20。
所述热风罩位于回转窑中部靠近出料端。
所述热交换管从热风罩部位直接向回转窑进料端方向布置。
优化地，所述热交换管也可以先向出料端布置一段，然后再转弯180℃向进料端方向布置。
所述热风罩和高温气体输入机构可以为一套，也可以为两套或三套。
所述回转窑设置多个物料温度检测装置、多个热交换管温度检测装置，通过多个物料温度检测和/或多个热交换管温度检测装置的反馈，控制高温气体输入机构的燃烧和/或回转窑的转速，从而有效控制回转窑内的温度。
本发明的有益效果是：⑴热风罩设置在回转窑壳体外周，热风罩起到加热气体的分配作用，在回转窑转动过程中，与热风罩连接的各个热交换管得到的分配热量基本是一致的，各交换管与物料的热交换也相应是均匀的，煤热解在沿着回转窑轴线方向的相应区段，热解程度是一致的，热交换管内、外所有部位是两个分开的系统，所以热解产生的煤气是不含加热产生的废气，煤气的热值相对就高，利用价值高，不会被白白烧掉，就可做到节能减排；还避免了公开号为：CN101985565A，煤物质多燃烧器子母管分离设备的等专利中，因散热机 构与加热机构都设置在回转窑内，造成有些加热机构能正常加热，有些加热机构不能正常加热，本来散热机构是为了给物料预热的，结果造成因有些加热机构不能正常加热，反过来散热机构还要从物料吸热，设备的有效利用率将显著下降，散热管的伸缩不一致，设备内部热应力大，设备寿命短等缺陷；回转窑内壁设置隔热、保温层，使回转窑热效率利用高，回转窑壳体温度低，安全可靠。⑵热风罩不是直接产生热量的地方，它是由高温气体输入机构燃烧产生的热量传递过来的，高温气体输入机构在窑外，燃烧的状况容易观察到，燃烧器相对容易检修、维护与保养，避免了如公开号为：CN101985565A，煤物质多燃烧器子母管分离设备的等专利不易观察燃烧状况和检修、维护、保养难的现象，且高温气体输入机构不仅可以用气态，也可以用液态，还可以用固态的煤粉等可燃介质。⑶热交换管与热风罩连接部位采用弯头连接作用：一是为了将两者不能直接连接通过弯头，可顺利实现连接；二是通过弯头，高温气体平滑地进行90度的转弯，且90度的弯头容易实现相差90度位相的加工和现场施工。⑷设置保温层是为了回转窑内的热量尽量少的向窑壳体传热，减少热量损失，而在所述热交换管进气弯头端与所述回转窑外壳连接部位所形成的局部回转窑内壁不设置保温层，是为了热风分配室向回转窑外壳传递的热量，尽快通过物料与外壳进行热交换，将热风分配室处的回转窑外壳降温，以增加此处的回转窑外壳强度。⑸回转窑外壳设置隔热环的作用是：通过设置隔热环，热风罩的热量不能直接传递给窑体外壳，且在隔热环部位的窑体外壳，在此处得到隔热环与窑体外壳形成的间隙带来的空气或水的冷却，降低了该部位窑体外壳的温度，减小高温对窑体外壳的强度降低作用。⑹热交换管用0Cr25Ni20耐热钢是为了热交换体系获得更长的使用寿命。⑺热风罩与回转窑外壳或所述热风罩与所述隔热环所围成的热分配室内侧设置耐火材料，是为了减少热量损失，同时保护热风罩、回转窑外壳及隔热环。⑻所述热交换管先向出料端布置一段，然后再转弯180℃向进料端方向布置有两项重要意义：一是有利于煤热解在回转部位，温度达到较一致的、煤快速热解的、产油率最高的温度分布特征；二是为调节热风罩所在部位的位置，躲开滚轮部位。⑼热风罩设置两个或三个可以实现对回转窑的分段加热，分段控温。⑽回转窑设置多个物料温度检测装置、多个热交换管温度检测装置，通过多个物料温度检测和/或多个热交换管温度检测的反馈，可以控制高温气体输入机构的燃烧和/或回转窑的转速，从而有效控制回转窑内的温度，使之符合工艺要求的温度。
附图说明
图1为实施例中热风罩与回转窑外壳围成一个热分配室，热交换管从热风罩部位直接向回转窑进料端方向布置的示意图；
图2为实施例中热风罩与回转窑外壳围成一个热分配室，一部分热交换管从热风罩部位直接 向回转窑进料端方向布置，另一部分热交换管也可以先向出料端布置一段，然后再转弯180℃向进料端方向布置的示意图；
图3为实施例中热风罩与所述隔热环围成一个热风分配室，热交换管从热风罩部位直接向回转窑进料端方向布置，两个热风罩分段向回转窑预热的示意图；
图4为实施例中热风罩与所述隔热环围成一个热风分配室，一部分热交换管从热风罩部位直接向回转窑进料端方向布置，另一部分热交换管也可以先向出料端布置一段，然后再转弯180℃向进料端方向布置示意图。
具体实施方式
实施例一：
如图1所示，一种物料加热装置，包括回转窑1、多个热交换管2、热风罩3、高温气体输入机构4、废气集气室5、废气输出管道6，所述回转窑设有进料端7和出料端8，所述热交换管2设置在回转窑1体内，沿周向均匀分布多个，所述热交换管2与回转窑1内腔之间为物料的通道，所述热风罩3设置在回转窑1壳体外周，所述热交换管2的进气端与所述热风罩3连通，所述热交换管2与热风罩3连接部位采用弯头连接，所述弯头为热交换管2的一部分，所述热风罩3与回转窑1外壳围成一个热风分配室，所述热交换管2进气的弯头端与所述回转窑1外壳连接；所述热交换管2的出气端与所述废气集气室5连通，所述废气集气室5与所述废气输出管道6连通，所述废气收集室5设置在回转窑1进料端7，所述热风罩3与所述高温气体输入机构4连通，所述热风罩3与所述回转窑1外壳之间的外侧设置密封机构10，所述回转窑1壳体内表面设置保温层13，而在热交换管2进气弯头端与所述回转窑1外壳连接的部位的回转窑1壳体内表面不设置保温层。
所述热交换管2的材质为耐热钢，优化地，所述耐热钢为0Cr25Ni20。
所述热风罩3与回转窑2外壳所围成的热分配室内侧设置耐火材料。
所述热风罩3位于回转窑1中部靠近出料端8。
所述热交换管2从热风罩3部位直接向回转窑1进料端7方向布置，所述热风罩3为一个。
所述回转窑1设置多个物料温度检测装置14，通过多个物料温度检测装置14的反馈，可以控制高温气体输入机构4的燃烧，从而有效控制回转窑内的温度，使之符合工艺要求的温度。
实施例二：
如图2所示，一种物料加热装置，包括回转窑1、多个热交换管2、热风罩3、高温气体输入 机构4、废气集气室5、废气输出管道6，所述回转窑1有进料端7和出料端8，所述热交换管2设置在回转窑1体内，沿周向均匀分布多个，所述热交换管2与回转窑2内腔之间为加工物料的通道，所述热风罩3设置在回转窑1壳体外周，所述热交换管2的进气端与所述热风罩3连通，所述热交换管2与热风罩3连接部位采用弯头连接，所述弯头为热交换管2的一部分，所述热风罩3与回转窑1外壳围成一个热风分配室，所述热交换管2进气的弯头端与所述回转窑1外壳连接；所述热交换管2的出气端与所述废气集气室5连通，所述废气集气室5与所述废气输出管道6连通，所述废气收集室5设置在回转窑1的进料端7，所述热风罩3与所述高温气体输入机构4连通，所述热风罩3与所述回转窑1外壳之间的外侧设置密封机构10，所述回转窑1壳体内表面设置保温层13，所述回转窑1壳体内表面设置保温层13，而在热交换管2进气弯头端与所述回转窑1外壳连接的部位的回转窑1壳体内表面不设置保温层。
所述热交换管2的材质为耐热钢，优化地，所述耐热钢为0Cr25Ni20。
所述热风罩3与所述回转窑1外壳所围成的热分配室内侧设置耐火材料。
所述一部分热交换管2从热风罩3部位直接向回转窑1进料端7方向布置，所述另一部分热交换管2先向出料端8布置一段，然后再转弯180℃向进料端7方向布置。
所述热风罩3为一个。
所述回转窑1设置多个物料温度检测装置14、多个热交换管温度检测装置15，通过多个物料温度检测装置14和多个热交换管温度检测装置15的反馈，可以控制高温气体输入机构的燃烧和回转窑的转速，从而有效控制回转窑内的温度，使之符合工艺要求的温度。
实施例三：
如图3所示，物料加热装置，包括回转窑1、多个热交换管2、热风罩3、高温气体输入机构4、废气集气室5、废气输出管道6，所述回转窑有进料端7和出料端8，所述热交换管2设置在回转窑1体内，沿周向均匀分布多个，所述热交换管2与回转窑2内腔之间为物料的加热通道，所述热风罩3设置在回转窑1壳体外周，所述热交换管2的进气端与所述热风罩3连通，所述热交换管2与热风罩3连接部位采用弯头连接，所述弯头为热交换管2的一部分，所述热交换管2的出气端与所述废气集气室5连通，所述废气集气室5与所述废气输出管道6连通，所述废气收集室5设置在回转窑1进料端7，所述热风罩3与所述高温气体输入机构4连通，所述热风罩3与所述回转窑1外壳之间的外侧设置密封机构10，所述回转窑1壳体内表面设置保温层13。
所述回转窑1外壳的外侧设置了隔热环11，所述隔热环11与所述回转窑1体的外壳 设置有隔热的空气间隙12，所述空气间隙12与大气相通，起到冷却隔热环11与对应的回转窑1体外壳，所述热交换管2的弯头端贯穿回转窑1的外壳与所述隔热环11连接，所述热风罩3与所述隔热环11围成一个热风分配室。
所述热交换管2的材质为耐热钢，优化地，所述耐热钢为0Cr25Ni20。
所述热风罩3与所述隔热环11所围成的热分配室内侧设置耐火材料。
所述热交换管2从热风罩3部位直接向回转窑1进料端7方向布置。
所述热风罩3为两个，分段向回转窑供热。
所述回转窑1设置多个物料温度检测装置14、多个热交换管温度检测装置15，通过多个物料温度检测装置14或多个热交换管温度检测装置15的反馈，可以控制高温气体输入机构的燃烧或回转窑的转速，从而有效控制回转窑内的温度，使之符合工艺要求的温度。
实施例四：
如图4所示，物料加热装置，包括回转窑1、多个热交换管2、热风罩3、高温气体输入机构4、废气集气室5、废气输出管道6，所述回转窑有进料端7和出料端8，所述热交换管2设置在回转窑1体内，沿周向均匀分布多个，所述热交换管2与回转窑2内腔之间为物料的通道，所述热风罩3设置在回转窑1壳体外周，所述热交换管2的进气端与所述热风罩3连通，所述热交换管2与热风罩3连接部位采用弯头连接，所述弯头为热交换管2的一部分，所述热交换管2的出气端与所述废气集气室5连通，所述废气集气室5与所述废气输出管道6连通，所述废气收集室5设置在回转窑1进料端7，所述热风罩3与所述高温气体输入机构4连通，所述热风罩3与所述回转窑1外壳之间的外侧设置密封机构10，所述回转窑1壳体内表面设置保温层13。
所述回转窑1外壳的外侧设置了隔热环11，所述隔热环11与所述回转窑1体的外壳设置有隔热的空气间隙12，所述空气间隙12与大气相通，起到冷却隔热环11与对应的回转窑1体外壳，所述热交换管2的弯头端贯穿回转窑1的外壳与所述隔热环11连接，所述热风罩3与所述隔热环11围成一个热风分配室。
所述热交换管2的材质为耐热钢，优化地，所述耐热钢为0Cr25Ni20。
所述热风罩3与所述隔热环11所围成的热分配室内侧设置耐火材料。
所述一部分热交换管2从热风罩3部位直接向回转窑1进料端7方向布置，所述另一部分热交换管2先向出料端8布置一段，然后再转弯180℃向进料端7方向布置。
所述回转窑设置多个物料温度检测装置14、多个热交换管温度检测装置15，通过多个物料温度检测装置和多个热交换管温度检测装置的反馈，可以控制高温气体输入机构的燃 烧和回转窑的转速，从而有效控制回转窑内的温度，使之符合工艺要求的温度。
以上所述仅为本发明的若干个实施例，并不以此限制本发明，对熟悉本领域的技术人员，可以根据需要，对本发明的加热装置做多种变化、替换和修饰。凡在本发明的精神范围和原则之内，所做的任何修改、等同替换、改进等，皆属本发明权利要求的涵盖范围。

Claims (10)

  1. 一种物料加热装置，包括回转窑、多个热交换管、热风罩、高温气体输入机构、废气集气室、废气输出管道，所述回转窑有进料端和出料端，其特征在于：所述热交换管设置在回转窑内，沿周向均匀分布多个且邻近回转窑内壁，所述回转窑内壁上设置热交换管支架，所述回转窑壁上设置保温层，所述热交换管与回转窑之间的空间为物料的通道，所述热风罩设置在回转窑壳体外周，所述热交换管的进气端与所述热风罩连通，所述热交换管与热风罩连接部位采用弯头连接，所述弯头为热交换管的一部分，所述热交换管进气的弯头端与所述回转窑外壳连接，所述热风罩与回转窑外壳围成一个热风分配室，所述热交换管的出气端与所述废气集气室连通，所述废气集气室与所述废气输出管道连通，所述废气收集室设置在回转窑进料端，所述热风罩与所述高温气体输入机构连通，所述热风罩与所述回转窑外壳之间的外侧设置密封机构。
  2. 如权利要求1所述的物料加热装置，其特征在于：所述回转窑内壁设置保温层,所述热交换管进气弯头端与所述回转窑外壳连接部位所形成的局部回转窑内壁不设置保温层。
  3. 如权利要求1所述的物料加热装置，其特征在于：所述回转窑外壳的外侧设置了隔热环，所述隔热环与所述回转窑的外壳设置有隔热的空气间隙，所述空气间隙与大气相通，起到冷却隔热环与对应的回转窑外壳，所述热交换管的弯头端贯穿回转窑的外壳与所述隔热环连接，所述热风罩与所述隔热环围成一个热风分配室，所述热风罩与所述隔热环所围成的热风分配室内侧设置耐火材料层。
  4. 如权利要求1所述的物料加热装置，其特征在于：所述热交换管的材质为耐热钢。
  5. 如权利要求4所述的物料加热装置，其特征在于：所述耐热钢为0Cr25Ni20。
  6. 如权利要求1或2或3所述的物料加热装置，其特征在于：所述热风罩位于回转窑中部靠近出料端。
  7. 如权利要求1或2或3所述的物料加热装置，其特征在于：所述热交换管从热风罩部位直接向回转窑进料端方向布置。
  8. 如权利要求1或2或3所述的物料加热装置，其特征在于：所述热交换管先向出料端布置一段，然后再转弯180℃向进料端方向布置。
  9. 如权利要求1或2或3所述的物料加热装置，其特征在于：所述热风罩和高温气体输入机构为一套，也可为两套或三套。
  10. 如权利要求1～9任意一项所述的物料加热装置，其特征在于：所述回转窑设置多个物料温度检测装置、多个热交换管温度检测装置，通过多个物料温度检测和/或多个热交换管温度 检测装置的反馈，控制高温气体输入机构的燃烧和/或回转窑的转速，从而有效控制回转窑内的温度。
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