WO2014032305A1 - Inner and outer heat compound system and method for directly recovering heat of rotary kiln - Google Patents

Inner and outer heat compound system and method for directly recovering heat of rotary kiln Download PDF

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Publication number
WO2014032305A1
WO2014032305A1 PCT/CN2012/080912 CN2012080912W WO2014032305A1 WO 2014032305 A1 WO2014032305 A1 WO 2014032305A1 CN 2012080912 W CN2012080912 W CN 2012080912W WO 2014032305 A1 WO2014032305 A1 WO 2014032305A1
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WO
WIPO (PCT)
Prior art keywords
inner cylinder
cylinder
combustion chamber
rotary kiln
drum
Prior art date
Application number
PCT/CN2012/080912
Other languages
French (fr)
Chinese (zh)
Inventor
林秀梅
林建男
Original Assignee
Lin Xiumei
Lin Jiannan
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 Lin Xiumei, Lin Jiannan filed Critical Lin Xiumei
Priority to PCT/CN2012/080912 priority Critical patent/WO2014032305A1/en
Publication of WO2014032305A1 publication Critical patent/WO2014032305A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/20—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having rotating or oscillating drums
    • 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
    • F27B7/10—Rotary-drum furnaces, i.e. horizontal or slightly inclined internally heated, e.g. by means of passages in the wall
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • 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
    • F27B2007/2008—Devices for reintroducing dust in the drum

Definitions

  • the invention relates to a heat recovery method and system, in particular to a thermal composite direct heat recovery method and system inside and outside a rotary kiln.
  • the high-temperature dry incineration method and the pyrolysis method adopted in the sludge treatment device mostly use the waste heat utilization form of the drying pretreatment of the sludge by the dryer.
  • the dried sludge is then incinerated or pyrolyzed into the furnace, from the furnace or ": high temperature flue gas in the combustion chamber, superheated steam (or hot oil) generated by the waste heat boiler or heat exchanger to generate high temperature air.
  • the sludge is pre-baked into a sludge dryer.
  • the sludge dryer for pre-treatment of sludge has low drying efficiency, unstable operation, low service life, high cost, especially difficult to enlarge, and the steam generated after sludge drying needs to be condensed. Dehydration, the resulting dirty water and odor have secondary pollution and other drawbacks.
  • the waste heat utilization system composed of sludge dryer and waste heat boiler (or heat exchanger) also occupies a large amount of room area and increases infrastructure investment. The system has long process, many pipelines, large heat loss, reduced waste heat utilization efficiency, and increased maintenance difficulty and cost.
  • the waste heat boiler requires professional operation, which increases the complexity of system control and increases labor costs. Summary of the invention:
  • the invention B provides a thermal composite direct heat recovery method and a system therefor, and the heat recovery method and system are not only simple in structure, reasonable in design, but also It is beneficial to solve various problems in the high-temperature and incineration method and the pyrolysis method due to the separate waste heat recovery and utilization system.
  • the method of heat-combined direct heat recovery inside and outside of the rotary kiln of the present invention is characterized in that: the flue gas after the first combustion of the inner cylinder of the rotary kiln is led to the second combustion chamber, and the flue gas continuously burned by the second combustion chamber is directly passed.
  • the outer wall of the inner cylinder is heated to exchange heat between the working fluid in the inner cylinder.
  • the flue gas passing through the gap between the inner and outer cylinders is sent to the exhaust gas purification system.
  • the thermal composite direct heat recovery system of the rotary kiln of the present invention is characterized in that it comprises: a base and a drum having an inlet and a discharge port disposed at the base, wherein the drum comprises an inner cylinder and a sleeve disposed on the outer periphery of the inner cylinder An outer cylinder having a gap with an outer wall of the inner cylinder, the feed L4 end of the inner cylinder being connected to a gas inlet of the combustion chamber disposed outside the drum, the gas outlet of the second combustion chamber being connected to the gap between the inner and outer cylinders through.
  • Strip-shaped straight fins are evenly distributed on the outer circumference of the outer cylinder wall surface.
  • the inner wall surface of the inner cylinder is intermittently welded from the feed UI to the discharge U end by a spiral line.
  • the discharge end of the inner cylinder is equipped with an ignition preheating burner and a burner heat-insulated long tube connected to the ignition preheating burner and extending into the inner cylinder.
  • the inner cylinder discharge end is further provided with a fourth air chamber, and the fourth air chamber is connected with a magnetized air supply device;
  • the inner cylinder inlet end is independently provided with first and second air chambers,
  • the first air chamber is disposed between the inlet of the inner cylinder and the inlet of the second combustion chamber;
  • the second chamber is disposed between the gap between the inner and outer cylinders and the outlet of the second combustion chamber;
  • the discharge port end is further provided with a second air chamber, the second air chamber is connected with the gap between the inner and outer cylinders, and the ft connection is An exhaust gas purification system.
  • the second combustion chamber comprises a combustion chamber body, an ignition preheating combustion machine and a distribution fan, wherein the combustion chamber body has a cavity body body with one or both ends and a cylindrical cavity in the middle, and a cavity metal shell in the cavity
  • the body structure is internally filled with refractory heat storage and heat insulating material, and a burner and a distribution chamber are arranged at the ⁇ end of the flue gas of the combustion chamber body, and the air distribution chamber is provided with a distribution duct.
  • the feeding end of the inner cylinder body is provided with a feeding device, and the feeding device is a pushing device driven by a pneumatic or hydraulic cylinder, or is composed of a screw conveyor and a feeding hopper.
  • the drum interrupting position is provided with a middle gear, and the base and the h are correspondingly provided with a transmission and a speed reducing mechanism for driving the gear; the front and rear broken positions of the drum are provided with pulleys, and the base is correspondingly provided for supporting A roller device that rotates the drum pulley.
  • the working principle of the invention The sludge is directly transported into the inner cylinder through the feeding device (there is no need to additionally pre-drying before entering the working device), and as the drum rotates continuously, the inner wall of the inner cylinder is dialed
  • the slag device is discharged.
  • the combustible flue gas generated flows through the first air chamber through the second combustion chamber, and is fully mixed with oxygen in the excess air, and the harmful substances are completely destroyed at high temperature, from the second
  • the gas outlet port of the combustion chamber is discharged to the gap between the inner and outer cylinders, and the outer wall of the inner cylinder is heated to exchange heat between the working fluid in the inner cylinder body, thereby achieving the purpose of utilizing waste heat; the flue gas after heat exchange passes through the second
  • the gas chamber is discharged to the exhaust gas purification system and discharged to the atmosphere after being treated.
  • the invention solves the problems existing in the common method of the waste heat recovery and utilization system (sludge drying system) in the ordinary way of the high-temperature dry incineration method and the pyrolysis method by the unique composite form of the waste heat utilization system and the kiln integration.
  • sludge drying system sludge drying system
  • the treatment capacity of the independent sludge drying system is too small, and it is difficult to enlarge the incineration or pyrolysis treatment system.
  • the present invention completely solves this problem;
  • the system process layout is compact, the plant use area is small, the land use area is reduced, and the investment amount is reduced;
  • Figure 1 is a schematic view showing the structure of the present invention
  • Figure 2 is a cross-sectional view of Figure 1. (i.e., a cross-sectional view of the magnetization pyrolysis system). detailed description:
  • the flue gas passing through the gap between the inner and outer cylinders is sent to the exhaust gas purification system.
  • the internal and external thermal composite direct heat recovery system of the rotary kiln of the present invention comprises a base 6 (the base may be an integral steel structure, or a separate cement podium, depending on the size of the kiln) and an inlet and a discharge raft provided on the base 6 Roller 5,
  • the drum ⁇ includes an inner cylinder 22 and a sleeve An outer cylinder 23 having a gap 24 at a periphery of the inner cylinder and an outer cylinder of the inner cylinder, wherein the inlet end 3 of the inner cylinder 22 is connected to a second combustion chamber 2 inlet 16 disposed outside the drum, the secondary combustion
  • the air outlet 17 of the chamber 2 communicates with the gap 24 between the inner and outer cylinders.
  • the combustible flue gas stream produced by the system of the invention is subjected to pyrolysis of the sludge through the second combustion chamber 2, and is fully mixed with oxygen in the excess air to be burned, and the harmful substances are completely incinerated at a high temperature, and are discharged from the second combustion chamber outlet port to the inner and outer cylinders.
  • the gap 24 between the outer cylinders 22 heats the outer wall of the inner cylinder 22 to exchange heat between the working fluids in the inner cylinder, thereby achieving the purpose of utilizing waste heat.
  • the strip-shaped straight fins 25 are uniformly arranged on the outer wall surface of the inner cylinder of the inner cylinder, and the straight fins also support the holding of the inner and outer cylinders while increasing the heat exchange efficiency, so that the inner cylinder and the outer cylinder are integrated, and the straight fins are not included.
  • the entire outer wall surface of the cylinder is “t”, but is arranged at a certain angle (or the straight fins are arranged on the outer circumference of the inner cylinder, and the straight fins can be provided with vent holes), so that The flue gas output from the combustion chamber 2 can be smoothly transferred from the feed end of the drum to the discharge end of the drum, and an insulating thermal insulation layer 29 is also disposed in the outer cylinder.
  • the inner wall surface of the inner cylinder is intermittently welded with a material discharging plate 26 from the feeding port to the discharge port end in a spiral manner.
  • the material discharging plate 26 not only serves as a feeding and stirring, but also increases the heat exchange efficiency. effect.
  • the discharge end of the inner cylinder is equipped with an ignition preheating burner 12 and a burner insulated and insulated long tube 27 which is connected to the ignition preheating burner and extends into the inner cylinder.
  • the thermal pilot tube 27 is supported by a bracket 28 that is fixed to the inner wall of the inner cylinder.
  • the igniting preheating burner 12 can be in the form of a plurality of fuels such as diesel, heavy oil, waste hydrazine, and methanol.
  • the igniting preheating burner 12 provides ignition temperature rise for the pyrolysis of the sludge and supplements the auxiliary heat when the sludge heat value is low.
  • the main function of the heat-insulating flame tube 27 at the end of the inner cylinder is to guide the flame of the burner to the pyrolysis combustion zone in the kiln, and not to affect the working condition of the slag section in the kiln, to avoid blowing the slag and affecting the cold. Slag effect.
  • the discharge port end of the inner cylinder is further provided with a fourth air chamber 33, and the fourth air chamber 33 is connected with a magnetized air supply device 11, and the third and fourth air chambers are two air chambers which are sealed independently of each other.
  • a blower 34 is disposed on the outer wall of the fourth air chamber 33, and the magnetized air from the magnetized air supply device 11 is sent into the drum to supply oxygen required for combustion of carbon generated by pyrolysis, and the sludge is accelerated at a lower temperature. Pyrolysis, and acts as a cold slag.
  • a 3 ⁇ 4 device 10 is installed, and the slag discharging device can be in the form of a spiral slag, a planetary output, a hydropneumatic slag, and the like.
  • the discharge port end of the drum is further provided with a third air chamber 32, and the third air chamber 32 communicates with the gap 24 between the inner and outer cylinders, and is connected with an exhaust gas purifying system 36.
  • the rear end of the inner cylinder feed U is independently provided with first and second air chambers 20, 21, and the first air chamber 20 is disposed between the inlet of the inner cylinder and the inlet of the second combustion chamber 16
  • the second air chamber 21 is disposed between the gap 24 between the inner and outer cylinders and the second combustion chamber air outlet 17.
  • the ⁇ : air chamber page is two air chambers that are sealed independently of each other.
  • the second combustion chamber includes a combustion chamber body 1.3, an ignition preheating burner 14 and a distribution fan 15, which is a cavity metal body structure with a vertebral body at the end or both ends, and a dome cylinder in the middle.
  • a refractory heat storage and heat insulating material is applied in the cavity metal shell structure, and a burner and a distribution chamber 18 are arranged at the inlet end of the flue gas of the combustion chamber body, and the air distribution chamber is provided with a distribution duct 19.
  • Ignition chamber ignition Preheating burner 14 is used for preheating and ignition of the second combustion chamber. Only when the combustible gas in the secondary combustion chamber can not maintain the A combustion, the fuel injection helps combustion. Under normal working conditions, it does not work and does not consume oil.
  • the feeding end of the inner cylinder is provided with a feeding device 9, and the feeding device 9 is a pushing device driven by a pneumatic or hydraulic cylinder, or is composed of a screw conveyor and a feeding hopper.
  • the drum is provided with a middle gear 31, and the base is correspondingly provided to drive the gear to rotate
  • the driving and deceleration mechanism 7 is provided with a pulley 30 at the front and rear sections of the drum, and the supporting device 8 for supporting the rotation of the drum pulley is correspondingly arranged on the base.
  • the working principle of the invention The sludge is transported into the inner cylinder through the feeding device (there is no need to additionally pre-bake before entering the device - L:), and as the drum rotates continuously, the material passes through the inner wall of the inner cylinder
  • the function of the plate, the sludge is continuously turned up and forwarded in the inner cylinder, and is dried by the drying of the front section of the drum and the pyrolysis gasification of the middle section.
  • the organic matter in the latter stage is incinerated and burned, and finally cooled to form ash, which is discharged through the slag discharge device at the tail of the drum. .
  • the combustible flue gas generated flows through the first air chamber through the second combustion chamber, and is fully mixed with oxygen in the excess air, and the harmful substances are completely destroyed at high temperature, from the second
  • the gas outlet of the combustion chamber is discharged to the gap between the inner and outer cylinders, and the outer wall of the inner cylinder is heated to exchange heat between the working fluid in the inner cylinder, thereby achieving the purpose of utilizing waste heat; the flue gas after heat exchange passes through the third
  • the gas chamber is discharged to the exhaust gas purification system and discharged to the atmosphere after being treated.
  • sludge pyrolysis needs to absorb heat, and the required heat source is provided by the combustion of carbon generated by the organic matter pyrolysis of the internal sludge of the furnace, and the insufficiency is provided by an auxiliary heat source (such as a burner).
  • the exhaust of the second combustion chamber can be effectively utilized to satisfy 3T (3T is the abbreviation of Temperature, Time and Turbulence, specifically refers to the incineration temperature of 85 () ° C, the second combustion chamber residence time of 2.0 s, and the larger turbulence
  • 3T is the abbreviation of Temperature, Time and Turbulence, specifically refers to the incineration temperature of 85 () ° C, the second combustion chamber residence time of 2.0 s, and the larger turbulence
  • the invention solves the problems existing in the ordinary way of separately setting the waste heat recovery and utilization system (sludge drying system) in the ordinary way of the high-temperature multi-chamber incineration method and the pyrolysis method by the unique composite form of the waste heat utilization system and the kiln integration.
  • the system process layout is compact, the plant use area is small, the land use area is reduced, and the investment amount is greatly reduced;
  • the integrated design makes the system configuration simple, easy to operate, low requirements for operators, and low staffing, thus reducing labor costs and maintenance costs.
  • the system of the invention utilizes the high-temperature flue gas discharged from the second combustion chamber, directly passes through the gap (annular jacket) formed by the inner and outer cylinders of the drum, and heats the outer wall of the inner cylinder to heat exchange the working medium in the inner cylinder, thereby achieving waste heat utilization. purpose.
  • the invention solves the problems of the above-mentioned common methods of the high-temperature dry incineration method and the pyrolysis method in the unique composite form of the waste heat utilization system and the kiln-integration.
  • the drum air supply uses magnetized air to reduce the sludge pyrolysis temperature and sludge pyrolysis rate.
  • the invention is suitable for large-scale centralized low-cost treatment and disposal of sludge and industrial sludge with high water content and low calorific value, and can also be set in the user's factory (such as sewage plant) according to needs. It is also used for solid waste such as oil contaminated soil, life, industry (including hazardous waste) suitable for rotary kiln treatment and disposal.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Incineration Of Waste (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Treatment Of Sludge (AREA)

Abstract

An inner and outer heat compound system and method for directly recovering heat of rotary kiln. The system comprises a base (6) on which a rolling cylinder (5) with a feeding port and a discharge port is arranged. The rolling cylinder (5) comprises an inner cylinder (22) and an outer cylinder (23), wherein the outer cylinder (23) is sleeved around the periphery of the inner cylinder (22) with a gap (24) kept between the outer cylinder (23) and the outer wall of the inner cylinder (22). The feeding end of the inner cylinder (22) is connected with the air inlet (16) of the secondary combustion chamber (2) arranged outside of the rolling cylinder, and the air outlet (17) of the secondary combustion chamber is communicated with the gap (24) between the inner and outer cylinders. The system utilizes the high temperature flue gas discharged from the secondary combustion chamber to heat the outer wall of the inner cylinder through the gap formed between the inner and outer cylinders of the rolling cylinder and exchange heat with the working medium in the inner cylinder, and therefore the waste heat is utilized.

Description

回转窑内外热复合式直搂热回收方法及其*** 技术领域：  Thermal composite straight heat recovery method and system inside and outside rotary kiln Technical Field:
本发明涉及一种热回收方法及***，特别是一种回转窑内外热复 合式直接热回收方法及其***。 背景技术：  The invention relates to a heat recovery method and system, in particular to a thermal composite direct heat recovery method and system inside and outside a rotary kiln. Background technique:
目前污泥处理装置采用的高温干化焚烧法和热解法，多采用烘干 机对污泥进行烘干预处理的余热利用形式。烘干后的污泥再进入炉内 焚烧或热解，来自炉内或「：燃室的高温烟气， 经余热锅炉产生过热蒸 汽（或热油）或热交换器换热后产生高温空气再进入污泥烘干机对污 泥进行预烘干。  At present, the high-temperature dry incineration method and the pyrolysis method adopted in the sludge treatment device mostly use the waste heat utilization form of the drying pretreatment of the sludge by the dryer. The dried sludge is then incinerated or pyrolyzed into the furnace, from the furnace or ": high temperature flue gas in the combustion chamber, superheated steam (or hot oil) generated by the waste heat boiler or heat exchanger to generate high temperature air. The sludge is pre-baked into a sludge dryer.
对污泥进行烘干预处理的污泥烘干机存在烘干效率低，运行不稳 定， 寿命低， 造价高， 特别是难以大型化等问题， 而污泥烘干后产生 的蒸汽还需冷凝脱水， 产生的脏水和臭气存在二次污染等弊端。 同时 污泥烘干机、 余热锅炉（或热交换器）构成的余热利用***还占用大 量） 房面积， 增加基础建设投资。 ***流程长， 管道多， 热损失大， 降低了余热利用效率， 增加了维护难度和成本。余热锅炉需专业人员 操作， 增加了***控制复杂性， 增加人工成本。 发明内容：  The sludge dryer for pre-treatment of sludge has low drying efficiency, unstable operation, low service life, high cost, especially difficult to enlarge, and the steam generated after sludge drying needs to be condensed. Dehydration, the resulting dirty water and odor have secondary pollution and other drawbacks. At the same time, the waste heat utilization system composed of sludge dryer and waste heat boiler (or heat exchanger) also occupies a large amount of room area and increases infrastructure investment. The system has long process, many pipelines, large heat loss, reduced waste heat utilization efficiency, and increased maintenance difficulty and cost. The waste heat boiler requires professional operation, which increases the complexity of system control and increases labor costs. Summary of the invention:
本发明的 B的在于提供一种回转窑内外热复合式直接热回收方 法及其***， 该热回收方法及***不仅结构简单、 设计合理， 而且有 利于解决高温千化焚烧法和热解法因单独设置余热回收利用***存 在的种种问题。 The invention B provides a thermal composite direct heat recovery method and a system therefor, and the heat recovery method and system are not only simple in structure, reasonable in design, but also It is beneficial to solve various problems in the high-temperature and incineration method and the pyrolysis method due to the separate waste heat recovery and utilization system.
本发明通过以下技术方案来实现：  The invention is achieved by the following technical solutions:
本发明回转窑内外热复合式直接热回收方法， 其特征在于： 将回 转窑内筒第一次燃烧后的烟气通往第二燃烧室，由第二燃烧室继续燃 烧排出的烟气直接通往 IHj转窑内、外筒间的间隙内， 以对内筒体外壁 进行加热， 实现对内筒体内的工质进行热交换。  The method of heat-combined direct heat recovery inside and outside of the rotary kiln of the present invention is characterized in that: the flue gas after the first combustion of the inner cylinder of the rotary kiln is led to the second combustion chamber, and the flue gas continuously burned by the second combustion chamber is directly passed. In the gap between the inner and outer cylinders of the IHj rotary kiln, the outer wall of the inner cylinder is heated to exchange heat between the working fluid in the inner cylinder.
上述通过内、 外筒体间隙后的烟气输往尾气净化***。  The flue gas passing through the gap between the inner and outer cylinders is sent to the exhaust gas purification system.
本发明回转窑内外热复合式直接热回收***， 其特征在于： 包括 底座和设置在底座― t的具有进、 出料口的滚筒， 所述滚筒包括有内筒 和套置在内筒体***与内筒外壁具有间隙的外筒，所述内筒的进料 L4 端与设置在滚筒体外的- 燃室进气口相连，所述二燃室的出气口与 内、 外筒间的间隙相连通。  The thermal composite direct heat recovery system of the rotary kiln of the present invention is characterized in that it comprises: a base and a drum having an inlet and a discharge port disposed at the base, wherein the drum comprises an inner cylinder and a sleeve disposed on the outer periphery of the inner cylinder An outer cylinder having a gap with an outer wall of the inner cylinder, the feed L4 end of the inner cylinder being connected to a gas inlet of the combustion chamber disposed outside the drum, the gas outlet of the second combustion chamber being connected to the gap between the inner and outer cylinders through.
上述内筒体外壁面上圆周均匀布设有条状直翅片。  Strip-shaped straight fins are evenly distributed on the outer circumference of the outer cylinder wall surface.
匕述内筒体内壁面上从进料 UI往出料 U端以螺旋线方式间断焊 接有拨料板。  The inner wall surface of the inner cylinder is intermittently welded from the feed UI to the discharge U end by a spiral line.
. --- 1:述内筒体出料口端装设有点火预热燃烧机和与点火预热燃烧 机连接的伸入该内筒体内的燃烧机隔热导火长筒。  --- 1: The discharge end of the inner cylinder is equipped with an ignition preheating burner and a burner heat-insulated long tube connected to the ignition preheating burner and extending into the inner cylinder.
上述内筒体出料 Π端还设有第四气室，该第四气室上连接有磁化 空气供风装置； 上述内筒体进料口端独立设有第一、 二气室， 所述第 一气室设置在内筒体的进料口与二燃室进气口之间；所述第二气室设 置在内、外筒间的间隙与二燃室出气口之间； 上述滚筒的出料口端还 设有第二气室， 所述第二气室与内、 外筒间的间隙相连通， ft连接有 一尾气净化***。 The inner cylinder discharge end is further provided with a fourth air chamber, and the fourth air chamber is connected with a magnetized air supply device; the inner cylinder inlet end is independently provided with first and second air chambers, The first air chamber is disposed between the inlet of the inner cylinder and the inlet of the second combustion chamber; the second chamber is disposed between the gap between the inner and outer cylinders and the outlet of the second combustion chamber; The discharge port end is further provided with a second air chamber, the second air chamber is connected with the gap between the inner and outer cylinders, and the ft connection is An exhaust gas purification system.
上述二燃室包括有燃室本体、 点火预热燃烧机和配风机， 所述燃 室本体为一端或两端带椎体， 中间为圆柱体的空腔金属壳体结构， 在 空腔金属壳体结构内敷耐火蓄热及绝热材料，在燃室本体烟气进 π端 装有燃烧机和配风室， 配风室设有配风管。  The second combustion chamber comprises a combustion chamber body, an ignition preheating combustion machine and a distribution fan, wherein the combustion chamber body has a cavity body body with one or both ends and a cylindrical cavity in the middle, and a cavity metal shell in the cavity The body structure is internally filled with refractory heat storage and heat insulating material, and a burner and a distribution chamber are arranged at the π end of the flue gas of the combustion chamber body, and the air distribution chamber is provided with a distribution duct.
上述内筒体进料口端设有进料装置， 所述进料装置为采用气动、 液压缸驱动的推料装置， 或者由螺旋输送机和进料斗构成。  The feeding end of the inner cylinder body is provided with a feeding device, and the feeding device is a pushing device driven by a pneumatic or hydraulic cylinder, or is composed of a screw conveyor and a feeding hopper.
卜.述滚筒中断位置设有中部齿轮，在底座. h对应设有驱动该齿轮 转动的传动及减速机构； 所述滚筒前、 后断位置设有带轮， 所述底座 上对应设有用于支撑滚筒带轮转动的托轮装置。  The drum interrupting position is provided with a middle gear, and the base and the h are correspondingly provided with a transmission and a speed reducing mechanism for driving the gear; the front and rear broken positions of the drum are provided with pulleys, and the base is correspondingly provided for supporting A roller device that rotates the drum pulley.
本发明的工作原理： 污泥直接经进料装置输送进入内筒（而不需 要另外经过预先烘干后才能进入该设备工作），随着滚筒不断的转动， 经过内筒内壁― t:的拨料板作用， 污泥在内筒中不断― t:翻、 前送， 经滚 筒前段的烘干 ~中段热解气化， 后段有机物碳化焚烧燃烬， 最终冷却 形成灰渣， 经滚筒尾部的出渣装置排出。烟气方面， 本发明***热解 污泥后， 产生的可燃烟气通过第- ·气室流经二燃室内， 与过量空气中 氧气充分混合燃烧， 有害物质在高温下被完全焚毁， 从二燃室出气口 排到内、外筒间的间隙， 对内筒体外壁进行加热， 使内筒体中的工质 进行热交换， 从而达到余热利用目的； 经过热交换后的烟气经过第二 气室排往尾气净化***， 经处理后达标排放至大气。  The working principle of the invention: The sludge is directly transported into the inner cylinder through the feeding device (there is no need to additionally pre-drying before entering the working device), and as the drum rotates continuously, the inner wall of the inner cylinder is dialed The role of the material plate, the sludge in the inner cylinder continuously - t: turn, forward, through the front section of the drum drying ~ middle section pyrolysis gasification, the latter stage of organic carbonization incineration burning, the final cooling to form ash, through the tail of the drum The slag device is discharged. In terms of flue gas, after the system of the present invention thermally decomposes the sludge, the combustible flue gas generated flows through the first air chamber through the second combustion chamber, and is fully mixed with oxygen in the excess air, and the harmful substances are completely destroyed at high temperature, from the second The gas outlet port of the combustion chamber is discharged to the gap between the inner and outer cylinders, and the outer wall of the inner cylinder is heated to exchange heat between the working fluid in the inner cylinder body, thereby achieving the purpose of utilizing waste heat; the flue gas after heat exchange passes through the second The gas chamber is discharged to the exhaust gas purification system and discharged to the atmosphere after being treated.
本发明以余热利用***和窑炉一体化的独特复合形式，解决了高 温干化焚烧法和热解法普通方式因单独设置余热回收利用***（污泥 烘干***） 存在的种种问题。 具有如下优点： 1、 受限于独立污泥烘千***处理能力过小， 通常焚烧或热解处 理处置***的难以大型化， 本发明彻底解决这一问题； The invention solves the problems existing in the common method of the waste heat recovery and utilization system (sludge drying system) in the ordinary way of the high-temperature dry incineration method and the pyrolysis method by the unique composite form of the waste heat utilization system and the kiln integration. Has the following advantages: 1. The treatment capacity of the independent sludge drying system is too small, and it is difficult to enlarge the incineration or pyrolysis treatment system. The present invention completely solves this problem;
2、***工艺平面布置紧凑， 厂房使用面积小， 减少了土地使用 面积， 大太降低了投资额；  2. The system process layout is compact, the plant use area is small, the land use area is reduced, and the investment amount is reduced;
3、 内外热复合余热利用一体化方式， 采用 3T达标后的烟气， 直 接引回***利用， 减少了热量损失的过程， 提高了换热效率， ***基 本不需要消耗辅助燃料， 大幅降低运行成本；  3, internal and external thermal composite waste heat utilization integrated mode, the use of 3T standard flue gas, direct return to the system utilization, reduce the heat loss process, improve heat transfer efficiency, the system basically does not need to consume auxiliary fuel, significantly reduce operating costs ;
4、 - 体化设计使***配置简明， 操作简单， 对操作者要求低， 人 J¾配备少， 从而降低人工成本与维护成本。 附图说明：  4, - The physical design makes the system configuration simple, easy to operate, low requirements for operators, and less J3⁄4 equipment, which reduces labor costs and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS:
图 1是本发明的构造示意图；  Figure 1 is a schematic view showing the structure of the present invention;
图 2是图 1.的 - 断面图 （即磁化热解***断面图）。 具体实施方式：  Figure 2 is a cross-sectional view of Figure 1. (i.e., a cross-sectional view of the magnetization pyrolysis system). detailed description:
本发明回转窑内外热复合式直接热回收方法，将回转窑内筒第- - 次燃烧后的烟气通往第二燃烧室，由第二燃烧室继续燃烧排出的烟气 直接通往回转窑内、 外筒间的间隙内， 以对内筒体外壁进行加热， 实 现对内筒体内的工质进行热交换。  The method of heat-combined direct heat recovery inside and outside the rotary kiln of the present invention, the flue gas after the first combustion of the rotary kiln inner cylinder is led to the second combustion chamber, and the flue gas continuously burned by the second combustion chamber directly leads to the rotary kiln In the gap between the inner and outer cylinders, the outer wall of the inner cylinder is heated to exchange heat between the working fluid in the inner cylinder.
上述通过内、 外筒体间隙后的烟气输往尾气净化***。  The flue gas passing through the gap between the inner and outer cylinders is sent to the exhaust gas purification system.
本发明回转窑内外热复合式直接热回收***， 包括底座 6 (底座 可以是整体钢构， 也可是分立水泥墩座， 视窑大小而定）和设置在底 座 6上的具有进、 出料 Π的滚筒 5 , 所述滚筒 δ包括有内筒 22和套 置在内筒体***与内筒外壁具有间隙 24的外筒 23， 所述内筒 22的 进料口端 3与设置在滚筒体外的一二燃室 2进气口 16相连， 所述二 燃室 2的出气口 17与内、外筒间的间隙 24相连通。本发明***热解 污泥后产生的可燃烟气流经二燃室 2 , 与过量空气中氧气充分混合燃 烧， 有害物质在高温下被完全焚毁， 从二燃室出气口排到内、外筒间 的间隙 24， 对内筒体 22外壁进行加热， 使内筒体中的工质进行热交 换， 从而达到余热利用的目的。 The internal and external thermal composite direct heat recovery system of the rotary kiln of the present invention comprises a base 6 (the base may be an integral steel structure, or a separate cement podium, depending on the size of the kiln) and an inlet and a discharge raft provided on the base 6 Roller 5, the drum δ includes an inner cylinder 22 and a sleeve An outer cylinder 23 having a gap 24 at a periphery of the inner cylinder and an outer cylinder of the inner cylinder, wherein the inlet end 3 of the inner cylinder 22 is connected to a second combustion chamber 2 inlet 16 disposed outside the drum, the secondary combustion The air outlet 17 of the chamber 2 communicates with the gap 24 between the inner and outer cylinders. The combustible flue gas stream produced by the system of the invention is subjected to pyrolysis of the sludge through the second combustion chamber 2, and is fully mixed with oxygen in the excess air to be burned, and the harmful substances are completely incinerated at a high temperature, and are discharged from the second combustion chamber outlet port to the inner and outer cylinders. The gap 24 between the outer cylinders 22 heats the outer wall of the inner cylinder 22 to exchange heat between the working fluids in the inner cylinder, thereby achieving the purpose of utilizing waste heat.
上述内筒体外壁面上岡周均匀布设有条状直翅片 25， 直翅片在 增加换热效率的同时还起连接内外筒的固持作用，使内筒与外筒构成 整体， 直翅片不 在内筒体整个外壁面圆周― t都有， 而是间隔一定角 度设置（或者直翅片在内筒体***整圈设置， 在直翅片― t设有通气孔 也可以）， 从而可以让从二燃室 2输出的烟气可以顺畅地从滚筒的进 料口端输往滚筒出料口端， 在外筒体内敷还设有保温绝热层 29。  The strip-shaped straight fins 25 are uniformly arranged on the outer wall surface of the inner cylinder of the inner cylinder, and the straight fins also support the holding of the inner and outer cylinders while increasing the heat exchange efficiency, so that the inner cylinder and the outer cylinder are integrated, and the straight fins are not included. The entire outer wall surface of the cylinder is “t”, but is arranged at a certain angle (or the straight fins are arranged on the outer circumference of the inner cylinder, and the straight fins can be provided with vent holes), so that The flue gas output from the combustion chamber 2 can be smoothly transferred from the feed end of the drum to the discharge end of the drum, and an insulating thermal insulation layer 29 is also disposed in the outer cylinder.
上述内筒体内壁面上从进料口往出料口端以螺旋线方式间断焊 接有拨料板 26， 该拨料板 26不仅起到送料和搅拌的作用， 同时还起 到增加换热效率的作用。  The inner wall surface of the inner cylinder is intermittently welded with a material discharging plate 26 from the feeding port to the discharge port end in a spiral manner. The material discharging plate 26 not only serves as a feeding and stirring, but also increases the heat exchange efficiency. effect.
. --- 1:述内筒体出料口端装设有点火预热燃烧机 12和与点火预热燃 烧机连接的伸入该内筒体内的燃烧机隔热导火长筒 27， 隔热导火长 筒 27由固定在内筒内壁上的支架 28支撑。 点火预热燃烧机 12可使 用柴油、 重油、 废汕、 甲醇等多种燃料形式。 点火预热燃烧机 12为 污泥的热解提供炉内点火升温， 并在污泥热值较低时补充辅助热量。 而内筒体尾端的隔热导火长筒 27主要作用是将燃烧机火焰导至窑内 热解燃烧区， 并且不至影响窑内出渣段工况， 避免将渣吹起和影响冷 渣效果。 --- 1: The discharge end of the inner cylinder is equipped with an ignition preheating burner 12 and a burner insulated and insulated long tube 27 which is connected to the ignition preheating burner and extends into the inner cylinder. The thermal pilot tube 27 is supported by a bracket 28 that is fixed to the inner wall of the inner cylinder. The igniting preheating burner 12 can be in the form of a plurality of fuels such as diesel, heavy oil, waste hydrazine, and methanol. The igniting preheating burner 12 provides ignition temperature rise for the pyrolysis of the sludge and supplements the auxiliary heat when the sludge heat value is low. The main function of the heat-insulating flame tube 27 at the end of the inner cylinder is to guide the flame of the burner to the pyrolysis combustion zone in the kiln, and not to affect the working condition of the slag section in the kiln, to avoid blowing the slag and affecting the cold. Slag effect.
上述内筒体出料口端还设有第四气室 33， 该第四气室 33上连接 有磁化空气供风装置 11 , 第三、 四气室是两个互相独立密封的气室。 在第四气室 33外壁布置有喷风嘴 34， 将来自磁化空气供风装置 11 的磁化空气送入滚筒内， 供给热解产生的碳燃烧所需氧气， 同时在较 低温度下加速污泥热解， 并起冷渣作用。 在第四气室 33下部装有出 ¾装置 10， 该出渣装置可以是螺旋出渣， 行星出 ¾， 液压气动闸板 出渣等多种形式。  The discharge port end of the inner cylinder is further provided with a fourth air chamber 33, and the fourth air chamber 33 is connected with a magnetized air supply device 11, and the third and fourth air chambers are two air chambers which are sealed independently of each other. A blower 34 is disposed on the outer wall of the fourth air chamber 33, and the magnetized air from the magnetized air supply device 11 is sent into the drum to supply oxygen required for combustion of carbon generated by pyrolysis, and the sludge is accelerated at a lower temperature. Pyrolysis, and acts as a cold slag. In the lower part of the fourth air chamber 33, a 3⁄4 device 10 is installed, and the slag discharging device can be in the form of a spiral slag, a planetary output, a hydropneumatic slag, and the like.
. --- 1:述滚筒的出料口端还设有第三气室 32，所述第三气室 32与内、 外筒间的间隙 24相连通， 且连接有一尾气净化*** 36。  --- 1: The discharge port end of the drum is further provided with a third air chamber 32, and the third air chamber 32 communicates with the gap 24 between the inner and outer cylinders, and is connected with an exhaust gas purifying system 36.
---匕述内筒体进料 U端独立设有第一、 二气室 20、 21 , 所述笫一 气室 20设置在内筒体的进料口与二燃室进气口 16之间；所述第二气 室 21设置在内、 外筒间的间隙 24与二燃室出气口 17之间。 第一、 ―：气室页是两个互相独立密封的气室。  The rear end of the inner cylinder feed U is independently provided with first and second air chambers 20, 21, and the first air chamber 20 is disposed between the inlet of the inner cylinder and the inlet of the second combustion chamber 16 The second air chamber 21 is disposed between the gap 24 between the inner and outer cylinders and the second combustion chamber air outlet 17. First, the ―: air chamber page is two air chambers that are sealed independently of each other.
匕述二燃室包括有燃室本体 1.3、点火预热燃烧机 14和配风机 15， 所述燃室本体为- 端或两端带椎体，中间为岡柱体的空腔金属壳体结 构， 在空腔金属壳体结构内敷耐火蓄热及绝热材料， 在燃室本体烟气 进口端装有燃烧机和配风室 18， 配风室设有配风管 19。 燃室点火 预热燃烧机 14用于二燃室预热和点火， 只有在二燃室内可燃气体不 能维持 A燃时才喷油助燃， 正常工况下是不工作不耗油的。  The second combustion chamber includes a combustion chamber body 1.3, an ignition preheating burner 14 and a distribution fan 15, which is a cavity metal body structure with a vertebral body at the end or both ends, and a dome cylinder in the middle. A refractory heat storage and heat insulating material is applied in the cavity metal shell structure, and a burner and a distribution chamber 18 are arranged at the inlet end of the flue gas of the combustion chamber body, and the air distribution chamber is provided with a distribution duct 19. Ignition chamber ignition Preheating burner 14 is used for preheating and ignition of the second combustion chamber. Only when the combustible gas in the secondary combustion chamber can not maintain the A combustion, the fuel injection helps combustion. Under normal working conditions, it does not work and does not consume oil.
上述内筒体进料口端设有进料装置 9， 所述进料装置 9为采用气 动、 液压缸驱动的推料装置， 或者由螺旋输送机和进料斗构成。  The feeding end of the inner cylinder is provided with a feeding device 9, and the feeding device 9 is a pushing device driven by a pneumatic or hydraulic cylinder, or is composed of a screw conveyor and a feeding hopper.
上述滚筒上设有中部齿轮 31， 在底座上对应设有驱动该齿轮转 动的传动及减速机构 7; 所述滚筒前、后段位置设有带轮 30， 所述底 座上对应设有用于支撑滚筒带轮转动的托轮装置 8。 The drum is provided with a middle gear 31, and the base is correspondingly provided to drive the gear to rotate The driving and deceleration mechanism 7 is provided with a pulley 30 at the front and rear sections of the drum, and the supporting device 8 for supporting the rotation of the drum pulley is correspondingly arranged on the base.
本发明的工作原理： 污泥经进料装置输送进入内筒（而不需要另 外经过预先烘 后才能进入该设备― L:作）， 随着滚筒不断的转动， 经 过内筒内壁上的拨料板作用， 污泥在内筒中不断上翻、 前送， 经滚筒 前段的烘干与中段热解气化， 后段有机物碳化焚烧燃烬， 最终冷却形 成灰渣， 经滚筒尾部的出渣装置排出。烟气方面， 本发明***热解污 泥后， 产生的可燃烟气通过第- -气室流经二燃室内， 与过量空气中氧 气充分混合燃烧， 有害物质在高温下被完全焚毁， 从二燃室出气口排 到内、 外筒间的间隙， 对内筒体外壁进行加热， 使内筒体中的工质进 行热交换， 从而达到余热利用目的； 经过热交换后的烟气经过第三气 室排往尾气净化***， 经处理后达标排放至大气。  The working principle of the invention: The sludge is transported into the inner cylinder through the feeding device (there is no need to additionally pre-bake before entering the device - L:), and as the drum rotates continuously, the material passes through the inner wall of the inner cylinder The function of the plate, the sludge is continuously turned up and forwarded in the inner cylinder, and is dried by the drying of the front section of the drum and the pyrolysis gasification of the middle section. The organic matter in the latter stage is incinerated and burned, and finally cooled to form ash, which is discharged through the slag discharge device at the tail of the drum. . In terms of flue gas, after the system of the invention is pyrolyzed, the combustible flue gas generated flows through the first air chamber through the second combustion chamber, and is fully mixed with oxygen in the excess air, and the harmful substances are completely destroyed at high temperature, from the second The gas outlet of the combustion chamber is discharged to the gap between the inner and outer cylinders, and the outer wall of the inner cylinder is heated to exchange heat between the working fluid in the inner cylinder, thereby achieving the purpose of utilizing waste heat; the flue gas after heat exchange passes through the third The gas chamber is discharged to the exhaust gas purification system and discharged to the atmosphere after being treated.
以往污泥热解要吸收热量，所需热源 - ^般由炉内部污泥有机质热 解产生的碳燃烧提供， 不足之处由辅助热源（如燃烧机等）提供。 采 用本发明， 可有效利用二燃室排出的满足 3T ( 3T是 Temperature, Time和 Turbulence的英文缩写， 具体指焚烧温度 85()°C， 二燃室 停留时间 2. 0s， 以及较大的湍流程度， 以确保有毒有害物质彻底焚 毁）原则的烟气所携带热量在滚筒内筒外壁对工质补充热量， 可大幅 降低辅助燃料消耗， 甚至不用辅助燃料。  In the past, sludge pyrolysis needs to absorb heat, and the required heat source is provided by the combustion of carbon generated by the organic matter pyrolysis of the internal sludge of the furnace, and the insufficiency is provided by an auxiliary heat source (such as a burner). By adopting the invention, the exhaust of the second combustion chamber can be effectively utilized to satisfy 3T (3T is the abbreviation of Temperature, Time and Turbulence, specifically refers to the incineration temperature of 85 () ° C, the second combustion chamber residence time of 2.0 s, and the larger turbulence To the extent that the toxic and hazardous substances are completely burned, the heat carried by the flue gas on the outer wall of the drum is supplemented with heat to the working fluid, which can greatly reduce the auxiliary fuel consumption, even without auxiliary fuel.
本发明以余热利用***和窑炉一体化的独特复合形式，解决了高 温千化焚烧法和热解法普通方式因单独设置余热回收利用***（污泥 烘干***） 存在的种种问题。 具有如下优点：  The invention solves the problems existing in the ordinary way of separately setting the waste heat recovery and utilization system (sludge drying system) in the ordinary way of the high-temperature multi-chamber incineration method and the pyrolysis method by the unique composite form of the waste heat utilization system and the kiln integration. Has the following advantages:
1、 受限于独立污泥烘千***处理能力过小， 通常焚烧或热解处 理处置***的难以大型化， 本发明彻底解决这一问题；1. Limited by the independent sludge drying system, the processing capacity is too small, usually incineration or pyrolysis The treatment system is difficult to enlarge, and the present invention completely solves this problem;
2、***工艺平面布置紧凑， 厂房使用面积小， 减少了土地使用 面积， 大大降低了投资额； 2. The system process layout is compact, the plant use area is small, the land use area is reduced, and the investment amount is greatly reduced;
3、 内外热复合余热利用一体化方式， 采用 3T达标后的烟气， 直 接引回***利用， 减少了热量损失的过程， 提高了换热效率， ***基 本不需要消耗辅助燃料， 大幅降低运行成本；  3, internal and external thermal composite waste heat utilization integrated mode, the use of 3T standard flue gas, direct return to the system utilization, reduce the heat loss process, improve heat transfer efficiency, the system basically does not need to consume auxiliary fuel, significantly reduce operating costs ;
4、 一体化设计使***配置简明， 操作简单， 对操作者要求低， 人员配备少， 从而降低人工成本与维护成本。  4. The integrated design makes the system configuration simple, easy to operate, low requirements for operators, and low staffing, thus reducing labor costs and maintenance costs.
本发明***利用了二燃室排出的高温烟气，直接通过滚筒内外筒 构成的间隙 （环状夹套）， 对内筒外壁进行加热， 使内筒中的工质进 行热交换， 从而达到余热利用目的。该发明以余热利用***和窑炉-一 体化的独特复合形式，解决了上述高温干化焚烧法和热解法普通方式 存在的种种问题。另外， 滚筒供气采用磁化空气， 可降低污泥热解温 度和污泥热解速度。  The system of the invention utilizes the high-temperature flue gas discharged from the second combustion chamber, directly passes through the gap (annular jacket) formed by the inner and outer cylinders of the drum, and heats the outer wall of the inner cylinder to heat exchange the working medium in the inner cylinder, thereby achieving waste heat utilization. purpose. The invention solves the problems of the above-mentioned common methods of the high-temperature dry incineration method and the pyrolysis method in the unique composite form of the waste heat utilization system and the kiln-integration. In addition, the drum air supply uses magnetized air to reduce the sludge pyrolysis temperature and sludge pyrolysis rate.
本发明适用于高含水率、低热值污水厂污泥、工业污泥的大规模集中 低成本处理处置， 根据需要也可在用户厂内 （如污水厂） 配套设置。 也用于适合回转窑处理处置的油污染土、 生活、 工业（包括危废）等 固废。 The invention is suitable for large-scale centralized low-cost treatment and disposal of sludge and industrial sludge with high water content and low calorific value, and can also be set in the user's factory (such as sewage plant) according to needs. It is also used for solid waste such as oil contaminated soil, life, industry (including hazardous waste) suitable for rotary kiln treatment and disposal.

Claims

权利要求书  Claim
、 一种回转窑内外热复合式直接热回收方法， 其特征在于： 将回 转窑内筒第一次燃烧后的烟气通往第二燃烧室， 由第二燃烧室 继续燃烧排出的烟气直接通往回转窑内、 外筒间的间隙内， 以 对内筒体外壁进行加热， 实现对内筒体内的工质迸行热交换。 、 根据权利要求 1所述的回转窑内外热复合式直接热 IE]收方法， 其特征在于：通过内、外筒体间隙后的烟气输往尾气净化***。 、 · 实现权利要求 1所述回转窑内外热复合式直接热回收方法 的热回收***， 其特征在于： 包括底座和设置在底座上的具有 进、 出料口的滚筒， 所述滚筒包括有内筒和套置在内筒体*** 与内筒外壁具有间隙的外筒， 所述内筒的进料 U端与设置在滚 筒体外的- 燃室进气口相连， 所述二燃室的出气口与内、 夕卜 筒间的间隙相连通。 The utility model relates to a thermal composite direct heat recovery method inside and outside a rotary kiln, which is characterized in that: the flue gas after the first combustion of the inner cylinder of the rotary kiln is led to the second combustion chamber, and the flue gas continuously burned by the second combustion chamber is directly In the gap between the inner and outer cylinders of the rotary kiln, the outer wall of the inner cylinder is heated to realize heat exchange between the working fluids in the inner cylinder. The method according to claim 1, wherein the flue gas after the gap between the inner and outer cylinders is sent to the exhaust gas purifying system. And a heat recovery system for realizing the thermal composite direct heat recovery method of the rotary kiln according to claim 1, comprising: a base and a drum having an inlet and a discharge port disposed on the base, the drum including the inner a cylinder and an outer cylinder having a gap between the outer cylinder and the outer cylinder of the inner cylinder, wherein the U-end of the inner cylinder is connected to the air inlet of the combustion chamber provided outside the drum, and the air outlet of the second combustion chamber It is connected to the gap between the inner and the outer tube.
、 根据权利要求 3所述的回转窑内外热复合式直接热 IE]收***， 其特征在于： 在所述内筒体外壁面― t圆周均匀布设有条状直翅 片。 The rotary kiln internal and external thermal composite direct thermal IE receiving system according to claim 3, characterized in that: strip-shaped straight fins are uniformly arranged on the outer wall surface of the inner cylinder.
、 根据权利要求 3或 4所述的回转窑内外热复合式直接热回收系 统， 其特征在于： 所述内筒体内壁面上从进料口往出料口端以 螺旋线方式间断焊接有拨料板。 The thermal composite direct heat recovery system of the rotary kiln according to claim 3 or 4, wherein: the inner wall surface of the inner cylinder is intermittently welded with a material from a feed port to a discharge end. board.
、 根据权利要求 5所述的回转窑内外热复合式直接热回收***， 其特征在于： 所述内筒体出料口端装设有点火预热燃烧机和与 点火预热燃烧机连接的伸入该内筒体内的燃烧机隔热导火长 筒； 所述内筒体出料 Π端还设有第四气室， 该第四气室上连接 有磁化空气供风装置： 所述滚筒的出料口端还设有第二气室， 所述第三气室与内、 外筒间的间隙相连通， 且连接有一尾气净 化***。 The thermal composite direct heat recovery system of the rotary kiln according to claim 5, wherein: the discharge end of the inner cylinder is provided with an ignition preheating burner and an extension connected to the ignition preheating burner. a combustion engine insulated into the inner cylinder; the inner cylinder discharge end is further provided with a fourth air chamber, and the fourth air chamber is connected There is a magnetized air supply device: a discharge chamber end of the drum is further provided with a second air chamber, and the third air chamber is connected with a gap between the inner and outer cylinders, and is connected with an exhaust gas purification system.
、 根据权利要求 6所述的回转窑内外热复合式直接热回收***， 其特征在于： 所述内筒体进料口端独立设有第一、 二气室， 所 述第一气室设置在内筒体的迸料口与：：燃室进气口之间； 所述 笫二气 ¾设置在内、 外筒间的间隙与二燃室出气 U之间。 The thermal composite direct heat recovery system of the rotary kiln according to claim 6, wherein: the inner cylinder inlet end is independently provided with first and second air chambers, and the first air chamber is disposed at The feed port of the inner cylinder is between: the combustion chamber inlet; the second gas 3⁄4 is disposed between the gap between the inner and outer cylinders and the outlet of the second combustion chamber U.
、 根据权利要求 8所述的回转窑内外热复合式直接热回收***， 其特征在于： 所述二燃室包括有燃室本体、 点火预热燃烧机和 配风机， 所述燃室本体为-一端或两端带椎体， 中间为圆柱体的 空腔金属壳体结构， 在空腔金属壳体结构内敷耐火蓄热及绝热 材料， 在燃室本体烟气进口端装有燃烧机和配风室， 配风室设 有配风管。 The thermal composite direct heat recovery system of the rotary kiln according to claim 8, wherein: the second combustion chamber comprises a combustion chamber body, an ignition preheating combustion engine and a distribution fan, and the combustion chamber body is - a hollow metal shell structure with a vertebral body at one end or both ends and a cylindrical body in the middle, and a refractory heat storage and heat insulating material in the hollow metal shell structure, and a burner and a gas inlet at the inlet end of the flue gas of the combustion chamber body In the wind room, the air distribution room is equipped with a distribution duct.
、 根据权利要求 9所述的回转窑内外热复合式直接热 IE]收***， 其特征在于： 所述内筒体进料 U端设有进料装置， 所述进料装 置为采用气动、 液压缸驱动的推料装置， 或者 il l螺旋输送机和 进料斗构成。The rotary kiln internal and external thermal composite direct thermal IE receiving system according to claim 9, wherein: the inner cylinder body feed U end is provided with a feeding device, and the feeding device is pneumatically and hydraulically The cylinder driven push device, or the il l screw conveyor and the feed hopper.
0、 根据权利要求 10所述的回转窑内外热复合式直接热 IE]收***， 其特征在于： 所述滚筒中断位置设有中部齿轮， 在底座上对应 设有驱动该齿轮转动的传动及减速机构； 所述滚筒前、 后断位 置设有带轮， 所述底座上对应设有用于支撑滚筒带轮转动的托 轮装置。 0. The rotary kiln internal and external thermal composite direct thermal IE receiving system according to claim 10, wherein: the drum interruption position is provided with a middle gear, and correspondingly driving and decelerating driving the gear on the base The mechanism is provided with a pulley on the front and rear break positions of the drum, and the base is provided with a supporting wheel device for supporting the rotation of the drum pulley.
PCT/CN2012/080912 2012-09-03 2012-09-03 Inner and outer heat compound system and method for directly recovering heat of rotary kiln WO2014032305A1 (en)

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