CN109668427A - 热处理窑炉 - Google Patents
热处理窑炉 Download PDFInfo
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- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
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- 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
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
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- 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
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
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- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
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- F27B9/34—Arrangements of linings
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- 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
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/36—Arrangements of heating devices
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- 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
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/40—Arrangements of controlling or monitoring devices
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- 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
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used
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- 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
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/36—Arrangements of heating devices
- F27B2009/3607—Heaters located above the track of the charge
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Abstract
本发明公开了一种热处理窑炉,包括具有炉膛的炉体,炉膛内安装有加热装置和物料输送装置,炉体的炉壁内安装有一个以上加热元件。本发明具有结构简单紧凑、成本低、制作改进简易、温度均匀性好等优点。
Description
技术领域
本发明涉及物料热处理装备技术领域,具体涉及一种热处理窑炉。
背景技术
新能源材料的烧结过程通常是在辊道窑等热处理窑炉中完成高温固相反应,热处理窑炉的炉膛横断面上各点的最大温度差即温度均匀度,炉膛内的温度均匀度越小,则烧结物料的一致性越好,产品品质就越高。一般来讲,辐射和对流是辊道窑等热处理窑炉炉膛内的主要传热方式,炉膛横断面的温度均匀度主要体现在侧部与中部的温度偏差,炉膛中部的物料相较于炉膛两侧的物料,受到加热元件的辐射和炉衬耐火材料的二次辐射更多,其温度也相对较高,再加上炉膛两侧一般开有进气口,进气口将低温气体从炉膛两侧通入炉膛时,也会进一步加大炉膛中部与两侧的温度差。并且随着热处理窑炉的断面宽度增大,也会导致温度均匀度进一步升高。
目前的热处理窑炉都是通过优化炉膛内加热元件的布置及功率控制,以及对通过进气口加入炉膛内的气体进行加热的方式来降低温度差,不仅存在控制难度大,普遍只能将温度差最低控制在10℃左右。但随着新材料的深入开发,对窑炉装备的要求越来越高,现有窑炉的温度均匀度水平已不适应新材料的发展需求。
发明内容
本发明要解决的技术问题是克服现有技术存在的不足,提供一种结构简单紧凑、成本低、制作改进简易、温度均匀性好的热处理窑炉。
为解决上述技术问题,本发明采用以下技术方案:
一种热处理窑炉,包括具有炉膛的炉体,所述炉膛内安装有加热装置和物料输送装置,所述炉体的炉壁内安装有一个以上加热元件。
作为上述技术方案的进一步改进:
所述热处理窑炉还包括用于向炉膛内通气的进气管路,所述进气管路位于炉体的炉壁内的一段为贯穿段,所述贯穿段为非直线型通道。
所述贯穿段呈Z字型。
所述贯穿段呈绕环在至少一个加热元件外部的螺旋型。
所述炉膛分为依次相接的升温段、保温段和降温段,所述升温段和保温段分别设有进气管路,所述升温段和/或保温段的进气管路穿过降温段的炉体的炉壁。
所述升温段和/或保温段的进气管路穿过降温段的炉体的顶部炉壁。
所述炉膛分为依次相接的多个温区段,各温区段的炉体的炉壁内均安装有由一独立功率控制器控制的多个加热元件。
所述炉体包括炉外壳和设于炉外壳内侧的导热耐火炉衬,所述加热元件安装在所述导热耐火炉衬内,或者所述加热元件安装在所述导热耐火炉衬和炉外壳之间。
所述导热耐火炉衬由导热耐火材料砖砌成,所述加热元件和贯穿段设于导热耐火材料砖内部。
所述导热耐火材料砖为高铝质耐火砖。
与现有技术相比,本发明的优点在于:本发明的热处理窑炉在炉体的炉壁内安装有多个加热元件,通过加热元件对炉体的炉壁进行加热,可对炉膛内形成有效的热辐射,起到补偿炉膛靠近炉壁区域温度的作用,可降低炉膛内的温度差,提高炉膛内温度的均匀性,从而提高热处理物料的产品品质,使热处理窑炉能够满足对温度均匀性要求更高的生产要求。并且,由于仅需在炉体的炉壁内安装加热元件即可提高炉膛内温度的均匀性,该热处理窑炉还具有结构简单紧凑、成本低、制作改进简易的优点。
附图说明
图1为热处理窑炉的剖视结构示意简图。
图2为加热元件和贯穿段设在高铝质耐火砖内的结构示意图。
图例说明:
1、炉体;11、炉膛;2、加热装置;3、物料输送装置;4、加热元件;5、进气管路;51、贯穿段;6、高铝质耐火砖。
具体实施方式
以下结合附图和具体实施例对本发明作进一步详细说明。
如图1所示,本实施例的热处理窑炉,包括具有炉膛11的炉体1,炉膛11内安装有加热装置2和物料输送装置3,炉体1的炉壁内安装有多个加热元件4。该热处理窑炉在炉体1的炉壁内安装有多个加热元件4,通过加热元件4对炉体1的炉壁进行加热,可对炉膛11内形成有效的热辐射,起到补偿炉膛11靠近炉壁区域温度的作用,可降低炉膛11内的温度差,提高炉膛11内温度的均匀性,从而提高热处理物料的产品品质,使热处理窑炉能够满足对温度均匀性要求更高的生产要求。并且,由于仅需在炉体1的炉壁内安装加热元件4即可提高炉膛11内温度的均匀性,该热处理窑炉还具有结构简单紧凑、成本低、制作改进简易的优点。
本实施例中,热处理窑炉还包括用于向炉膛11内通气的进气管路5,进气管路5位于炉体1的炉壁内的一段为贯穿段51,贯穿段51为非直线型通道。进气管路5的贯穿段51为非直线型通道,增加了气体在炉体1的炉壁内的停留时间,使得被加热的炉体1的炉壁可将气体预热到更高温度,能够减弱低温气体通入炉膛11对炉膛11内温差的影响,提高炉膛11内温度的均匀性;并且,在将气体加热至相同温度的情况下,能够大大降低加热元件4的加热功率,达到节省能耗和降低成本的目的。
本实施例中,贯穿段51呈Z字型,其结构简单、易于制作。在其他实施例中,还可使贯穿段51呈绕环在至少一个加热元件4外部的螺旋型,这样在保证结构紧凑的情况下,能够进一步大大延长气体在炉壁内的停留时间。当然,贯穿段51还可以采用其他非直线形式的通道。
本实施例中,炉膛11分为依次相接的升温段、保温段和降温段,升温段和保温段分别设有进气管路5,升温段和/或保温段的进气管路5穿过降温段的炉体1的炉壁。升温段和/或保温段的进气管路5穿过降温段的炉体1的炉壁,降温段的炉体1的炉壁可与进气管路5内的气体进行换热,一方面利用降温段的炉体1的炉壁对进气管路5内的气体进行加热,能够进一步节省能耗和降低成本,另一方面进气管路5内的气体吸收降温段的炉体1的炉壁热量,利于提高降温段的降温效率。
本实施例中,升温段和/或保温段的进气管路5穿过降温段的炉体1的顶部炉壁,也即进气管路5穿过降温段炉膛11顶部的炉壁。由于炉体1的顶部炉壁对应位于炉膛11顶部,其温度最高,与进气管路5内气体的换热效率更高,可提高对气体的预热效率和对降温段的冷却效率。
本实施例中,炉膛11分为依次相接的多个温区段,各温区段的炉体1的炉壁内均安装有由一独立功率控制器控制的多个加热元件4。各个温度段的加热元件4的加热功率能够进行独立控制,进而实现对各温区段温度的独立控制,对炉膛11内温度的可控性更好,易于保证整个炉膛11内温度的均匀性。
本实施例中,炉体1包括炉外壳和设于炉外壳内侧的导热耐火炉衬,加热元件4安装在导热耐火炉衬内,或者加热元件4安装在导热耐火炉衬和炉外壳之间。导热耐火炉衬由导热性好且耐火的材料构成,其可被快速加热并将热量快速传导和辐射到炉膛11,能够提高温度调节控制的响应速度。
本实施例中,如图2所示,导热耐火炉衬由导热耐火材料砖砌成,加热元件4和贯穿段51设于导热耐火材料砖内部。加热元件4和贯穿段51可预先设在导热耐火材料砖内,再通过常规的方法砌筑成导热耐火炉衬,可降低制作、安装难度;且加热元件4和贯穿段51均设在导热耐火材料砖内部,利于提高对贯穿段51内气体的加热效率;此外,加热元件4和贯穿段51均位于导热耐火材料砖内部,还可提高炉体1的结构紧凑性。
本实施例中,导热耐火材料砖为高铝质耐火砖6,高铝质耐火砖6为现有热处理窑炉的炉衬所采用的成熟构件,其由高铝质多孔隙的耐火材料制成,具有较好的热容,可在吸收热量后对炉膛11内物料产生较强的二次辐射,加热效率高。并且,贯穿段51内的少部分气体还可通过高铝质耐火砖6内部的孔隙渗入到炉膛11内,不仅利于提高炉膛11内气氛的均匀性,且这部分气体与高铝质耐火砖6的接触更充分、接触时间更长,预热效果更好,利于提高炉膛11内气氛均匀性。
由于炉膛11内的温度差主要体现为炉膛11中部和两侧部之间的温度差,本实施例的热处理窑炉仅在炉膛11两侧的炉壁上设置加热元件4,以降低成本、制造安装难度和控制难度。当然,在其他实施例中,也可在炉体1的炉壁的任意位置设置加热元件4。
本实施例中,加热装置2为电加热管,物料输送装置3为辊棒式输送装置,加热装置2和物料输送装置3均可参考现有辊道窑进行设置。优选的,在物料输送装置3的上方和下方均设有电加热管。
以上所述仅是本发明的优选实施方式,本发明的保护范围并不仅局限于上述实施例。对于本技术领域的技术人员来说,在不脱离本发明技术构思前提下所得到的改进和变换也应视为本发明的保护范围。
Claims (10)
1.一种热处理窑炉,包括具有炉膛(11)的炉体(1),所述炉膛(11)内安装有加热装置(2)和物料输送装置(3),其特征在于:所述炉体(1)的炉壁内安装有一个以上加热元件(4)。
2.根据权利要求1所述的热处理窑炉,其特征在于:所述热处理窑炉还包括用于向炉膛(11)内通气的进气管路(5),所述进气管路(5)位于炉体(1)的炉壁内的一段为贯穿段(51),所述贯穿段(51)为非直线型通道。
3.根据权利要求2所述的热处理窑炉,其特征在于:所述贯穿段(51)呈Z字型。
4.根据权利要求2所述的热处理窑炉,其特征在于:所述贯穿段(51)呈绕环在至少一个加热元件(4)外部的螺旋型。
5.根据权利要求2所述的热处理窑炉,其特征在于:所述炉膛(11)分为依次相接的升温段、保温段和降温段,所述升温段和保温段分别设有进气管路(5),所述升温段和/或保温段的进气管路(5)穿过降温段的炉体(1)的炉壁。
6.根据权利要求5所述的热处理窑炉,其特征在于:所述升温段和/或保温段的进气管路(5)穿过降温段的炉体(1)的顶部炉壁。
7.根据权利要求1所述的热处理窑炉,其特征在于:所述炉膛(11)分为依次相接的多个温区段,各温区段的炉体(1)的炉壁内均安装有由一独立功率控制器控制的多个加热元件(4)。
8.根据权利要求2至7中任一项所述的热处理窑炉,其特征在于:所述炉体(1)包括炉外壳和设于炉外壳内侧的导热耐火炉衬,所述加热元件(4)安装在所述导热耐火炉衬内,或者所述加热元件(4)安装在所述导热耐火炉衬和炉外壳之间。
9.根据权利要求8所述的热处理窑炉,其特征在于:所述导热耐火炉衬由导热耐火材料砖砌成,所述加热元件(4)和贯穿段(51)设于导热耐火材料砖内部。
10.根据权利要求8所述的热处理窑炉,其特征在于:所述导热耐火材料砖为高铝质耐火砖(6)。
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