WO2023065391A1 - 一种增设旁通垃圾预热道的小型垃圾焚烧炉 - Google Patents

一种增设旁通垃圾预热道的小型垃圾焚烧炉 Download PDF

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WO2023065391A1
WO2023065391A1 PCT/CN2021/127457 CN2021127457W WO2023065391A1 WO 2023065391 A1 WO2023065391 A1 WO 2023065391A1 CN 2021127457 W CN2021127457 W CN 2021127457W WO 2023065391 A1 WO2023065391 A1 WO 2023065391A1
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Prior art keywords
garbage
combustion chamber
preheating channel
incinerator
bypass
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PCT/CN2021/127457
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English (en)
French (fr)
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张继宁
潘慧敏
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歙县绿源环保设备有限公司
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Publication of WO2023065391A1 publication Critical patent/WO2023065391A1/zh

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    • 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
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • 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
    • F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
    • F23G5/14—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
    • 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
    • F23G5/44—Details; Accessories
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers

Definitions

  • the invention relates to a small garbage incinerator with a bypass garbage preheating channel added.
  • the existing waste incinerators provide incineration conditions for the burning of waste. Basically, they are equipped with thermal energy to preheat the waste that is put into the furnace for incineration. However, the corresponding methods for waste preheating and furnace feeding are different. On the basis of raw materials, the supporting technology of waste heat boiler is added. There is also waste incineration and preheating in one chamber.
  • the technical scheme of a garbage incinerator mainly embodies that the garbage thrown into the furnace is preheated by a spiral turner above the furnace, so as to provide a waste for the waste to burn.
  • Burnout provides incineration conditions, and a spiral turner is installed on the top of the furnace to preheat the incinerated garbage thrown into the furnace.
  • the opening time of the material inlet door is too long. Under the action of the external force of the induced draft fan, the two convective flows of equal speed but not isothermal contact in the furnace. Sexual drop from high temperature phenomenon occurs.
  • the purpose of the present invention is to provide a reasonable and orderly flue gas flow in the main body to be generated successively in order to solve the above problems, and to promote the full combustion of the garbage in the chamber.
  • a small garbage incinerator with a bypass garbage preheating channel is provided.
  • a small garbage incinerator with a bypass garbage preheating channel which includes a combustion chamber, a second combustion chamber and a garbage preheating channel;
  • the combustion chamber is an independent chamber, the second combustion chamber is set above the combustion chamber, the second combustion chamber and the combustion chamber together form the space for garbage burning and smoke removal in the incinerator;
  • the garbage preheating channel is set separately from the incinerator, and the garbage preheating channel is set in two groups
  • the connecting pipes are respectively connected to the combustion chamber and the second combustion chamber, and the garbage preheating channel is set on one side of the incinerator as the garbage external feeding port, the smoke passage and the garbage preheating channel.
  • the top plate of the combustion chamber is set in an arc shape to facilitate the turning and staying of the high-temperature flue gas plant in the furnace, and the lower part is conical to facilitate the sliding of dregs and waste materials in the garbage, and is formed by welding the furnace bottom plate and the conical bottom plate;
  • the bottom plate of the hearth and the conical bottom plate are respectively placed with oblique elevation furnace bars and flat furnace bars to facilitate incineration of garbage;
  • one side of the combustion chamber is provided with an inner garbage inlet, and the other side corresponding to the inner garbage inlet
  • An observation port is provided to facilitate inspection of the slag melting in the slag layer of the combustion chamber and the coking of the combustion layer.
  • the top plate of the second combustion chamber is arranged in an arc shape, and the lower part is located on the top plate of the combustion chamber; the second combustion chamber flue gas inlet and the second combustion chamber flue gas outlet are arranged in the second combustion chamber, and an auxiliary fuel is installed on one side.
  • the inlet is connected to the auxiliary fuel pipe; the flue gas outlet of the second combustion chamber is also provided with a flue gas guide plate for changing the convection path of the flue gas.
  • the top cover plate is fixed by a flange above the top plate of the second combustion chamber, and the insulation material is filled between the top cover plate and the top plate of the second combustion chamber to increase the heat preservation effect; the observation port in the combustion chamber is also provided below for cleaning slag inspection port.
  • the waste preheating channel exit is provided with an external garbage feed port, which is connected to the garbage internal feed port through a butt joint flange on one side of the incinerator;
  • the gas outlet pipe is connected to the flue gas inlet of the second combustion chamber.
  • the hot channel includes the top plate of the garbage preheating channel and the bottom plate of the preheating channel.
  • the top plate of the garbage preheating channel is coated with refractory castables, and the bottom plate of the preheating channel is arranged in steps. Good for rubbish sliding.
  • the incinerator below the conical bottom plate is provided with a slag room to remove the slag and soil waste mixed in the garbage falling from the oblique facade grate; the incinerator below the furnace bottom plate is provided with ash The pond, where the ash produced by incineration of garbage falls.
  • the inner wall of the incinerator is provided with a furnace refractory castable, and the furnace refractory castable is applied to the inner panel of the furnace body insulation layer, and an insulation partition space is provided outside the furnace body insulation layer; an insulation layer outer plate is provided outside the insulation partition space to Cut off the loss of heat energy in the combustion chamber.
  • the present invention can improve the combustion conditions of domestic garbage to the greatest extent without setting an isolated secondary combustion chamber, and control the production of dioxin compounds.
  • the present invention can ensure that the high-temperature flue gas has a longer residence time in the furnace under higher temperature conditions. Under such constant high-temperature conditions, it can effectively decompose and destroy the synthesis of dioxins,
  • the present invention can reasonably control the air volume, temperature and injection position of the combustion-supporting air, so that the three-T control method can play an important role; at the same time, the smooth flow and energy-saving method can be scientifically integrated into the entire flue gas flow and treatment process to achieve real benefits Harmless treatment of household waste.
  • Fig. 1 is A-A to structural representation of the present invention
  • Fig. 2 is a schematic diagram of the B-B direction structure of the present invention.
  • the purpose of the present invention is to provide a reasonable and orderly flue gas flow in the main body, which can promote the full combustion of the garbage in the chamber, and add a bypass garbage preheating channel, without setting up separate secondary combustion chambers through the interaction of each chamber.
  • the process plays a specific role, as shown in Figure 1 to 2, and its main parts are as follows:
  • a small garbage incinerator with a bypass garbage preheating channel which includes a combustion chamber 100, a secondary combustion chamber 200, and a garbage preheating channel 300;
  • the combustion chamber 100 is an independent chamber, and the secondary combustion chamber 200 is arranged above the combustion chamber 100 , the second combustion chamber 200 and the combustion chamber 100 together form the space for garbage burning and smoke removal in the incinerator;
  • the garbage preheating channel 300 is set separately from the incinerator, and the garbage preheating channel 300 is provided with two sets of connecting pipes respectively connected to the combustion chamber 100,
  • the second combustion chamber 200 and the garbage preheating channel 300 are arranged on one side of the incinerator as the garbage external feeding port, the smoke passage and the garbage preheating channel;
  • the garbage preheating channel 300 is also used as a preheating channel for inflowing garbage, and can also be used as a smoke passage to enter the second floor.
  • the combustion chamber 200 in order to facilitate the inspection of the slag melting and the coking of the combustion layer in the combustion chamber, and to cut off the direct relationship between the combustion chamber and the secondary combustion chamber, the combustion chamber and the secondary combustion chamber are set as follows:
  • the top plate 101 of the combustion chamber is set in an arc shape to facilitate the turning and staying of the high-temperature flue gas plant in the furnace, and the lower part is conical to facilitate the sliding of slag and soil waste in the garbage, and is formed by welding the furnace bottom plate 102 and the conical bottom plate 103; the furnace bottom plate 102 On the conical bottom plate 103, place inclined facade fire bars 104 and plane fire bars 105 respectively to facilitate incineration with overhead garbage; one side of the combustion chamber 100 is provided with a garbage inner feed port 106, and the other corresponding to the garbage inner feed port 106 The observation port 107 is arranged on the side so as to check the slag melting situation of the slag layer of the combustion chamber and the coking situation of the combustion layer;
  • the flue gas inlet 202 of the second combustion chamber and the flue gas outlet 203 of the second combustion chamber are connected to the auxiliary fuel pipe by setting an auxiliary fuel inlet 204 on one side; the convective pathway.
  • the top cover plate 206 is fixed by a flange above the top plate 201 of the second combustion chamber, and the space between the top cover plate 206 and the top plate 201 of the second combustion chamber is filled with an insulating material 207; An inspection port 108 for cleaning slag is provided.
  • the garbage preheating channel 300 outlet is provided with an external garbage feed port 301, which is connected to the garbage internal feed port 106 through a butt joint flange with the side of the incinerator;
  • the flue gas outlet 302 of the preheating channel elbow pipe is connected to the flue gas inlet 202 of the second combustion chamber;
  • the garbage outer feeding port 301 is set in the opposite direction of the slope of the garbage inner feeding port 106, and the vertical height of the garbage outer feeding port 301 is higher than that of the garbage
  • the vertical height of the inner feed port 106 is beneficial to the garbage sliding;
  • the garbage preheating channel 300 includes the garbage preheating channel top plate 303 and the preheating channel bottom plate 304, and the garbage preheating channel top plate 303 is internally coated with refractory castables, and the preheating channel bottom plate is 304 points
  • the section is arranged in a ladder shape, and the pouring material near the incinerator section is in a plane with the previous section to
  • the slag falling room 400 is set in the incinerator below the conical bottom plate 103 to remove the slag waste material mixed in the rubbish that falls from the inclined facade furnace bar 104;
  • the ash pond 500 is set in the incinerator, and the ash produced by incineration of the garbage falls here.
  • the inner wall of the incinerator is provided with a furnace refractory castable 600.
  • a thermal insulation partition space 800 is provided outside the thermal insulation layer 700 of the furnace body; an thermal insulation layer outer plate 900 is provided outside the thermal insulation partition space 800 to block the heat loss of the combustion chamber.

Abstract

一种增设旁通垃圾预热道（300）的小型垃圾焚烧炉，包括燃烧室（100）、二燃室（200）以及垃圾预热道（300）；燃烧室（100）为独立腔室，二燃室（200）设置在燃烧室（100）上方，二燃室（200）与燃烧室（100）共同组成焚烧炉中垃圾燃烧以及走烟的空间；垃圾预热道（300）与焚烧炉分离设置，垃圾预热道（300）设置两组连接管分别管接燃烧室（100）、二燃室（200），垃圾预热道（300）作为垃圾外进料口、走烟通道以及垃圾预热通道设置在焚烧炉一侧。无需设置离体的二燃室（200）就能最大程度地改善生活垃圾的燃烧条件，控制二恶因的合成物产生，同时能够促进合理有序的主体内烟气流程，促使膛内垃圾充份燃烧。

Description

一种增设旁通垃圾预热道的小型垃圾焚烧炉 技术领域
本发明涉及一种增设旁通垃圾预热道的小型垃圾焚烧炉。
背景技术
现有垃圾焚烧炉为了垃圾燃烧燃尽提供焚烧条件，基本上都配套有利用热能来预热投入炉膛焚烧的垃圾，但垃圾预热和炉膛投料的相应手段不尽相同，有在垃圾预热上料的基础上加设余热锅炉的配套技术。也有垃圾焚烧和预热在一个腔室内进行。
如中国专利号CN201310589505.1的专利技术文献所公开的一种垃圾焚烧炉其技术方案主要体现的是在炉膛上方按装有螺旋式翻转器来进行投入炉膛的垃圾空抛预热，为垃圾燃烧燃尽提供焚烧条件，而在炉膛顶端设螺旋式翻转器来进行投入炉膛的焚烧的垃圾空拋预热，虽然为投入炉膛焚烧的垃圾提供了燃烧条件，但在投料空抛的过程中，进料口门畅开的时间过长，在引风机外力作用下，二个等速度但不等温的对冲流在炉膛内发生接触，对于促使垃圾充份燃烧会产生不利因素，妒膛中心温度会间歇性的从高温下降现像发生。
另外烟气中的可燃挥发物和大颗粒烟尘，不能返回燃烧层燃烧。增加后序烟气处理难度，对于生活垃圾无害化处理，没有从根本上将环境困子与枝术手段相互协作调作用。
发明内容
本发明的目的就在于为了解决上述问题而提供一种合理有序的主体内烟气流程相继产生，促使膛内垃圾充份燃烧的增设旁通垃圾预热道的小型垃圾焚烧炉。
为了实现上述目的，本发明是通过以下技术方案实现的：一种增设旁通 垃圾预热道的小型垃圾焚烧炉，它包括燃烧室、二燃室以及垃圾预热道；所述燃烧室为独立腔室，二燃室设置在燃烧室上方，二燃室与燃烧室共同组成焚烧炉中垃圾燃烧以及走烟的空间；所述垃圾预热道与焚烧炉分离设置，垃圾预热道设置两组连接管分别管接燃烧室、二燃室，垃圾预热道作为垃圾外进料口、走烟通道以及垃圾预热通道设置在焚烧炉一侧。
进一步的，所述燃烧室顶板设置成弧形以利于高温烟气厂在炉膛内翻转停留，下方呈锥形以利于垃圾中的渣土废料的滑落，通过炉膛底板与锥形底板焊接成型；所述炉膛底板与锥形底板上分别搁置斜立面炉条和平面炉条以架空垃圾方便焚烧；所述燃烧室一侧设置垃圾内进料口，与垃圾内进料口相对应的另一侧设置观察口以便于捡查燃烧室融渣层的融渣情况和燃烧层结焦情况。
再进一步的，所述二燃室顶板设置成弧形，下方坐落在燃烧室顶板之上；所述二燃室内设置二燃室烟气进口与二燃室烟气出口，一侧通过设置辅助燃料进口连通辅助燃料管；所述二燃室烟气出口处还设置烟气导向板，用于改变烟气的对流途径。
特别的，所述二燃室顶板上方通过法兰固定顶盖板，顶盖板与二燃室顶板之间通过保温材料填充增加保温效果；所述燃烧室内的观察口下方还设置用于清理炉渣的检查口。
再进一步的，所述垃圾预热道出口处设置垃圾外进料口，通过与焚烧炉一侧对接法兰连接于垃圾内进料口；所述垃圾预热道上方通过预热道弯管烟气出口管接二燃室烟气进口。
更进一步的，所述垃圾外进料口设置在垃圾内进料口的斜坡相对方向，垃圾外进料口的垂直高度高于垃圾内进料口的垂直高度以利于垃圾滑动；所述垃圾预热道包括垃圾预热道顶板和预热道底板，垃圾预热道顶板内部涂抹耐火浇注料，预热道底板分段成阶梯状设置，靠近焚烧炉段涂抹浇注料与上一段呈一个平面以利于垃圾滑动。
更进一步的，所述锥形底板下方的焚烧炉中设置落渣间以清除从斜立面炉条上落下的夹杂在垃圾中的渣土废料；所述炉膛底板下方的焚烧炉中设置落灰塘，垃圾通过焚烧所产生的灰渣落入此处。
进一步的，所述焚烧炉内壁设置炉膛耐火浇注料，炉膛耐火浇注料涂抹在炉体保温层内板内测，炉体保温层外侧设置保温隔断空间；保温隔断空间的外侧设置保温层外板以隔断燃烧室热能流失。
与已有技术相比，本发明有益效果体现在：
1.本发明无需设置离体的二燃室就能最大程度地改善生活垃圾的燃烧条件，控制二恶因的合成物产生。
2.本发明能保证高温烟气在较高的温度条件下在炉膛有较长的停留吋间，在这样恒定的高温条件下，能有效地分解和破坏二恶因合成，
3.本发明能合理的控制助燃空气的风量，温度和注入位置，让三T控制方法显示重要的作用；同时让畅通节能法科学地融入整个烟气流程和处理过程中做到真正意义上的生活垃圾无害化处理。
附图说明
图1为本发明A-A向结构示意图；
图2为本发明B-B向结构示意图。
具体实施方式
下面结合附图中的实施例对本发明作进一步的详细说明，但并不构成对本发明的任何限制。
本发明旨在提供一种合理有序的主体内烟气流程相继产生，促使膛内垃圾充份燃烧的增设旁通垃圾预热道，无需设置离体的二燃室通过每个室体的相互流程，发挥了特定的作用，参照图1至2所示，其主要部分如下：
一种增设旁通垃圾预热道的小型垃圾焚烧炉，它包括燃烧室100、二燃室200以及垃圾预热道300；燃烧室100为独立腔室，二燃室200设置在燃烧室100上方，二燃室200与燃烧室100共同组成焚烧炉中垃圾燃烧以及走烟的空 间；垃圾预热道300与焚烧炉分离设置，垃圾预热道300设置两组连接管分别管接燃烧室100、二燃室200，垃圾预热道300作为垃圾外进料口、走烟通道以及垃圾预热通道设置在焚烧炉一侧；
在使用本发明的垃圾焚烧炉时，只需将垃圾自垃圾预热道300流入焚烧炉后，点火而垃圾预热道300也作为流入垃圾的预热通道，同时也能作为走烟通道进入二燃室200中，为了便于捡查燃烧室融渣层的融渣情况和燃烧层结焦情况，同时隔断燃烧室和二燃室的直接关系，将燃烧室和二燃室如下设置：
燃烧室顶板101设置成弧形以利于高温烟气厂在炉膛内翻转停留，下方呈锥形以利于垃圾中的渣土废料的滑落，通过炉膛底板102与锥形底板103焊接成型；炉膛底板102与锥形底板103上分别搁置斜立面炉条104和平面炉条105以架空垃圾方便焚烧；燃烧室100一侧设置垃圾内进料口106，与垃圾内进料口106相对应的另一侧设置观察口107以便于捡查燃烧室融渣层的融渣情况和燃烧层结焦情况；二燃室顶板201设置成弧形，下方坐落在燃烧室顶板101之上；二燃室200内设置二燃室烟气进口202与二燃室烟气出口203，一侧通过设置辅助燃料进口204连通辅助燃料管；二燃室烟气出口203处还设置烟气导向板205，用于改变烟气的对流途径。
另外为了实现保温效果，在二燃室顶板201上方通过法兰固定顶盖板206，顶盖板206与二燃室顶板201之间通过保温材料207填充；燃烧室100内的观察口107下方还设置用于清理炉渣的检查口108。
至于垃圾预热道300的设置如下：垃圾预热道300出口处设置垃圾外进料口301，通过与焚烧炉一侧对接法兰连接于垃圾内进料口106；垃圾预热道300上方通过预热道弯管烟气出口302管接二燃室烟气进口202；垃圾外进料口301设置在垃圾内进料口106的斜坡相对方向，垃圾外进料口301的垂直高度高于垃圾内进料口106的垂直高度以利于垃圾滑动；垃圾预热道300包括垃圾预热道顶板303和预热道底板304，垃圾预热道顶板303内部涂抹耐火 浇注料，预热道底板304分段成阶梯状设置，靠近焚烧炉段涂抹浇注料与上一段呈一个平面以利于垃圾滑动。
以下为适应现有焚烧炉的设置：锥形底板103下方的焚烧炉中设置落渣间400以清除从斜立面炉条104上落下的夹杂在垃圾中的渣土废料；炉膛底板102下方的焚烧炉中设置落灰塘500，垃圾通过焚烧所产生的灰渣落入此处，同时焚烧炉内壁设置炉膛耐火浇注料600，炉膛耐火浇注料600涂抹在炉体保温层内板700内测，炉体保温层700外侧设置保温隔断空间800；保温隔断空间800的外侧设置保温层外板900以隔断燃烧室热能流失。
以上所举实施例为本发明的较佳实施方式，仅用来方便说明本发明，并非对本发明作任何形式上的限制，任何所属技术领域中具有通常知识者，若在不脱离本发明所提技术特征的范围内，利用本发明所揭示技术内容所作出局部更动或修饰的等效实施例，并且未脱离本发明的技术特征内容，均仍属于本发明技术特征的范围内。

Claims (8)

  1. 一种增设旁通垃圾预热道的小型垃圾焚烧炉，其特征在于：它包括燃烧室、二燃室以及垃圾预热道；所述燃烧室为独立腔室，二燃室设置在燃烧室上方，二燃室与燃烧室共同组成焚烧炉中垃圾燃烧以及走烟的空间；所述垃圾预热道与焚烧炉分离设置，垃圾预热道设置两组连接管分别管接燃烧室、二燃室，垃圾预热道作为垃圾外进料口、走烟通道以及垃圾预热通道设置在焚烧炉一侧。
  2. 按照权利要求1所述的一种增设旁通垃圾预热道的小型垃圾焚烧炉，其特征在于：所述燃烧室顶板设置成弧形以利于高温烟气厂在炉膛内翻转停留，下方呈锥形以利于垃圾中的渣土废料的滑落，通过炉膛底板与锥形底板焊接成型；所述炉膛底板与锥形底板上分别搁置斜立面炉条和平面炉条以架空垃圾方便焚烧；所述燃烧室一侧设置垃圾内进料口，与垃圾内进料口相对应的另一侧设置观察口以便于捡查燃烧室融渣层的融渣情况和燃烧层结焦情况。
  3. 按照权利要求2所述的一种增设旁通垃圾预热道的小型垃圾焚烧炉，其特征在于：所述二燃室顶板设置成弧形，下方坐落在燃烧室顶板之上；所述二燃室内设置二燃室烟气进口与二燃室烟气出口，一侧通过设置辅助燃料进口连通辅助燃料管；所述二燃室烟气出口处还设置烟气导向板，用于改变烟气的对流途径。
  4. 按照权利要求2或3所述的一种增设旁通垃圾预热道的小型垃圾焚烧炉，其特征在于：所述二燃室顶板上方通过法兰固定顶盖板，顶盖板与二燃室顶板之间通过保温材料填充增加保温效果；所述燃烧室内的观察口下方还设置用于清理炉渣的检查口。
  5. 按照权利要求3所述的一种增设旁通垃圾预热道的小型垃圾焚烧炉，其特征在于：所述垃圾预热道出口处设置垃圾外进料口，通过与焚烧炉一侧对接法兰连接于垃圾内进料口；所述垃圾预热道上方通过预热道弯管烟气出 口管接二燃室烟气进口。
  6. 按照权利要求4所述的一种增设旁通垃圾预热道的小型垃圾焚烧炉，其特征在于：所述垃圾外进料口设置在垃圾内进料口的斜坡相对方向，垃圾外进料口的垂直高度高于垃圾内进料口的垂直高度以利于垃圾滑动；所述垃圾预热道包括垃圾预热道顶板和预热道底板，垃圾预热道顶板内部涂抹耐火浇注料，预热道底板分段成阶梯状设置，靠近焚烧炉段涂抹浇注料与上一段呈一个平面以利于垃圾滑动。
  7. 按照权利要求5所述的一种增设旁通垃圾预热道的小型垃圾焚烧炉，其特征在于：所述锥形底板下方的焚烧炉中设置落渣间以清除从斜立面炉条上落下的夹杂在垃圾中的渣土废料；所述炉膛底板下方的焚烧炉中设置落灰塘，垃圾通过焚烧所产生的灰渣落入此处。
  8. 按照权利要求1-7任一所述的一种增设旁通垃圾预热道的小型垃圾焚烧炉，其特征在于：所述焚烧炉内壁设置炉膛耐火浇注料，炉膛耐火浇注料涂抹在炉体保温层内板内测，炉体保温层外侧设置保温隔断空间；保温隔断空间的外侧设置保温层外板以隔断燃烧室热能流失。
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