WO2021208466A1 - 一种地幔式污泥阴燃快速焚烧处置装置及方法 - Google Patents

一种地幔式污泥阴燃快速焚烧处置装置及方法 Download PDF

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WO2021208466A1
WO2021208466A1 PCT/CN2020/136040 CN2020136040W WO2021208466A1 WO 2021208466 A1 WO2021208466 A1 WO 2021208466A1 CN 2020136040 W CN2020136040 W CN 2020136040W WO 2021208466 A1 WO2021208466 A1 WO 2021208466A1
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pit
smoldering
mantle
electric heating
bridge support
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PCT/CN2020/136040
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English (en)
French (fr)
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乔瑜
冯超
成明凯
高翔鹏
徐明厚
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华中科技大学
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00—Specific waste
    • F23G2209/12—Sludge, slurries or mixtures of liquids
    • 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
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Definitions

  • the invention belongs to the field of urban waste disposal, and more specifically, relates to a mantle-type sludge smoldering rapid incineration disposal device and method.
  • Sludge is one of the important wastes generated by the healthy operation of cities.
  • the traditional disposal methods are mainly landfill and a small amount of composting.
  • the traditional methods have not been accepted.
  • heat treatment includes traditional heat treatment technologies such as roasting, incineration, pyrolysis, gasification, and new technologies such as water.
  • Thermal carbonization and smoldering Biological fermentation composting has a long processing cycle, and it is difficult to control the sludge process of complex components. At the same time, the capacity reduction is limited, and the waste liquid and residue are difficult to use.
  • Smoldering technology is a technology that relies on high-moisture organic matter self-sustaining low-temperature combustion.
  • the heat transfer generated by the oxidation reaction of its organic components realizes the spread of combustion and the self-sustainment of the reaction, thereby realizing heat treatment with the aid of low external heat. , So it is an ideal technology for processing high-water organic waste such as sludge.
  • the technical equipment for sludge disposal on the market is still dominated by traditional thermal drying plus incineration or blending technology, and there is no technology and equipment based on smoldering.
  • the technical invention is a rapid incineration disposal device and process for high-water organic waste such as sludge, which is designed and developed based on smoldering technology. It can realize large-scale batch heat treatment of sludge with low energy consumption input, which has great market application prospects.
  • the present invention provides a mantle-type sludge smoldering rapid incineration disposal device and method. Electric heating nets and diagonal bridge brackets are set up so that the heat generated by the combustion of the bottom material is transferred to the upper material to assist combustion with the direction of the airflow, so as to achieve the effective use of the heat energy of the sludge organic matter combustion.
  • a mantle-type sludge smoldering rapid incineration disposal device which includes a pit body, an electric heating net, a load-bearing grid, a diagonal bridge support and a cloth curtain, wherein:
  • the pit wall of the pit body is surrounded by refractory bricks, the pit bottom is horizontally and evenly distributed with ventilation ducts leading to the outside through the ground, and the outlet of the ventilation duct at the bottom of the pit is blocked by piles of coarse gravel. Be covered with fine sand and fill the pit;
  • the electric heating net is buried in the fine sand, and its periphery is fixed on the pit wall; the load-bearing grid is horizontally supported on the pit surface of the pit body;
  • the diagonal bridge support spans over the pit body, and the bottom of the slanted bridge bracket is embedded at the pit opening; the cloth curtain covers the diagonal bridge support, and the bottom is sealed with the pit opening, and the cloth curtain is provided with Smoke outlet.
  • the coarse gravel has a particle size of 3 cm to 5 cm
  • the fine sand particle has a particle size of 1 cm to 2 cm.
  • the depth of the pit body is 50 cm
  • the thickness of the coarse gravel is 20 cm
  • the thickness of the fine sand is 30 cm
  • the burial depth of the electric heating net is 10 cm below the ground.
  • the pit wall and bottom of the pit body and the ventilation duct are all reinforced with cement and sealed.
  • the load-bearing grid is made of stainless steel, the grid is in a grid shape, and the pore size is 0.5 cm to 1.5 cm.
  • the load-bearing grid is supported by several pillars at the bottom of the pit, and its local load-bearing capacity is not less than 5t.
  • the cloth curtain is made of fireproof, waterproof, airtight and heat-insulating material, which is covered on the diagonal bridge support and reinforced by a chain.
  • a mantle-type sludge smoldering rapid incineration disposal method is provided, which is realized by the above-mentioned device and includes the following steps:
  • S1 mixes the sludge to be treated with sand to obtain a blend, the moisture content of the blend is not higher than 20%, and the calorific value is not lower than 0.2kJ/g;
  • S2 stacks the blend on the load-bearing grid to fill up the space between the pit surface and the diagonal bridge support, and then covers the cloth mantle above the blend through the diagonal bridge support to form a hermetic enclosure with the pit surface Space;
  • the S3 electric heating network is energized and heated. After a period of time, air is blown into the pit through the ventilation duct located at the bottom of the pit, so that the mixture starts to be incinerated, and the generated flue gas is discharged from the flue gas outlet to complete the rapid incineration of sludge smoldering.
  • the temperature 5 cm above the electric heating net is monitored, and when the temperature here reaches 300° C., air is blown into the pit from the ventilation duct.
  • the air velocity in the pit is stable and not less than 3.5 cm/s.
  • the present invention is based on the principle of forward smoldering propagation under forced air flow.
  • the pit body, electric heating net and diagonal bridge support are arranged so that the heat generated by the combustion of the bottom material is transferred to the upper material to assist the combustion along with the direction of the air flow to achieve pollution.
  • the effective utilization of sludge organic matter combustion heat energy based on the material stacking height of 50cm, the treatment efficiency of 60% moisture content of deep dehydrated sludge can reach 70kg/m 2 /h.
  • the thickness of coarse gravel and fine sand grains and the burial depth of the electric heating net are designed in detail to improve the sludge incineration effect.
  • the temperature 5cm above the electric heating network is monitored in real time to accurately control the air blowing time. At the same time, during the incineration process, you can choose to continue heating or you can choose to turn off the electric heating network according to actual needs. Save energy.
  • Figure 1 is a schematic structural diagram of a mantle-type sludge smoldering rapid incineration disposal device according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of the ground effect of a mantle-type sludge smoldering rapid incineration disposal device according to an embodiment of the present invention
  • FIG. 3 is a schematic top view of the appearance of the electric heating net according to the embodiment of the present invention.
  • Fig. 4 is a schematic top view of the outline of the load-bearing grid according to the embodiment of the present invention.
  • the embodiment of the present invention provides a mantle-type sludge smoldering rapid incineration disposal device, as shown in Figure 1, comprising a pit body, an electric heating net 3, a load-bearing grid 5, a diagonal bridge support and a cloth mantle 6, in which:
  • the walls of the pit body are surrounded by refractory bricks 4, and the bottom of the pit is horizontal, and there are evenly distributed ventilation ducts 7 (DN10) that lead to the outside through the bottom of the pit, which are used for uniform access from the bottom to the top of the pit.
  • the electric heating net 3 is buried in the fine sand 2, and its periphery is fixed on the wall of the pit and kept horizontal. Its appearance is shown in Fig. 3; the load-bearing grid 5 is shown in Fig. 4, which is embedded in The four walls of the refractory brick 4 are horizontally framed on the surface of the pit, that is, it is located at the height of the ground and covered by a layer of thin sand; the load-bearing grid 5 is supported by several pillars at the bottom of the pit, and its local load-bearing capacity is not less than 5t , It is resistant to pressure so as not to bend and deform; preferably, the load-bearing grid 5 is made of stainless steel with a stable structure, and the grid pore size is 0.5 cm to 1.5 cm, more preferably 1 cm.
  • the diagonal bridge bracket spans over the pit body, as shown in Figure 2, and is used to provide support for the cloth curtain 6. Fasten the chain of the cloth curtain 6; the cloth curtain 6 can be covered on the diagonal bridge support and reinforced by the chain, and the cloth curtain 6 is connected to the cement groove around the pit opening through the diagonal bridge support base and the cement groove at the same time.
  • a circular opening sealed to the flue gas pipe 7 is opened above the cloth curtain 6 as a smoke outlet 8; preferably, the cloth curtain 6 is made of fireproof, waterproof, airtight, and heat-insulating materials.
  • the particle size of the coarse gravel 1 is 3 cm to 5 cm
  • the particle size of the fine sand 2 is 1 cm to 2 cm
  • the depth of the pit body is 50 cm
  • the thickness of the coarse gravel 1 is 20 cm.
  • the thickness of the fine sand 2 is 30 cm
  • the burial depth of the electric heating net 3 is 10 cm below the ground.
  • Using the above device to carry out sludge smoldering rapid incineration treatment includes the following steps:
  • S1 mixes the high-moisture sludge to be treated with sand to obtain blend 9, which has a moisture content of not higher than 20% and a calorific value not lower than 0.2kJ/g;
  • S2 stacks the blend 9 above the load-bearing grid 5 to fill the space between the pit surface and the diagonal bridge bracket, and then covers the cloth curtain 6 on the top of the blend 9 through the diagonal bridge bracket to make it contact with the pit surface Enclosed into a confined space;
  • the S3 electric heating net 3 is energized and heated. After a period of time, a large amount of air is blown into the pit from the bottom of the pit body through the ventilation pipe 7 so that the blend 9 starts to burn, and the generated flue gas is discharged from the flue gas outlet 8. At this time, the bottom material The heat generated by the combustion is transferred to the upper material to assist combustion with the direction of the airflow, so as to achieve the effective utilization of the combustion heat energy of the sludge organic matter, and complete the rapid incineration of the sludge smoldering.
  • the temperature of the sand 5cm above the electric heating net (3) is monitored by a thermocouple.
  • the ventilation pipe (7) Blow a large amount of air into the pit, and adjust the electric heating power according to actual needs; the air flow rate in the pit is stable and not less than 3.5cm/s, which is determined according to the stacking height of different materials, and the disposal rate can reach 70kg/m 2 /h.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Water Supply & Treatment (AREA)
  • Treatment Of Sludge (AREA)

Abstract

一种地幔式污泥阴燃快速焚烧处置装置及方法，其包括坑体、电加热网（3）、承重格栅（5）、斜桥支架和布幔（6），其中：所述坑体的坑壁由耐火砖（4）围砌，坑底水平并均匀分布有经地底通向外部的通风管道（7），且通风管道（7）坑底的出口由粗石砾（1）堆砌封堵，粗石砾（1）上铺有细砂粒（2）并填满坑体；所述电加热网（3）埋覆于细砂粒（2）中，其四周固定在坑壁上；所述承重格栅（5）横架在坑面上；所述斜桥支架横跨在坑体上方，其底部嵌扣在坑口处；所述布幔（6）覆盖在斜桥支架上，且其底部与坑口密封连接，布幔（6）上方设有烟气出口（8）。所述装置及方法基于正向阴燃传播原理，使底部物料燃烧产生的热量随气流方向传递至上方物料辅助燃烧，达到污泥有机质燃烧热能的有效利用。

Description

一种地幔式污泥阴燃快速焚烧处置装置及方法 【技术领域】
本发明属于城市废弃物处置领域，更具体地，涉及一种地幔式污泥阴燃快速焚烧处置装置及方法。
【背景技术】
污泥是城市健康运行产生的重要废物之一，传统的处置方式主要是填埋以及少量堆肥，但随着城市土地资源的日益紧张和生态环保要求的逐渐提高，传统方式已经不被接受。现阶段高含水有机废弃物主要有两个方向：一种是生物发酵堆肥，另一种是热处理，其中，热处理包括了传统的热处理技术如烘焙、焚烧、热解、气化，以及新型技术如水热碳化和阴燃。生物发酵堆肥处理周期较长，对于复杂组分的污泥工艺过程难以控制，同时减容量有限，废液废渣难于利用。传统热处理技术如焚烧等具有高减容、高处置速率以及彻底无害化的优势，不过高含水率的污泥热值过低，热处理前往往需要进行供热干化，或者与高热值的燃料进行掺烧，降低了热能利用率，增加了处置成本，高温产生的烟气污染环境，得不偿失。水热碳化技术同样减容率有限，产生的碳材料仍待提质以扩大应用，另外水热碳化技术需要较高压力的容器，增加了设备投资成本。阴燃技术是一种依托高水分有机物自维持低温燃烧的技术，通过其有机组分氧化反应产生的热量传递实现燃烧的传播及反应的自维持，从而在外界低热量辅助的情况下实现热处置，因此是一种处理高含水有机废物如污泥的理想技术。
目前市场上关于污泥处置的技术装备仍以传统热干化加焚烧或掺烧技术为主，尚无基于阴燃的技术和设备出现。本技术发明即是基于阴燃技术设计研发的一种针对高含水有机废物如污泥的快速焚烧处置装置及工艺。可以在低能耗投入的同时实现污泥的大规模批量化热处置，极具市场应用 前景。
【发明内容】
针对现有技术的以上缺陷或改进需求，本发明提供了一种地幔式污泥阴燃快速焚烧处置装置及方法，其目的在于，基于强迫气流下的正向阴燃传播原理，对坑体、电加热网和斜桥支架等进行设置，使底部物料燃烧产生的热量随气流方向传递至上方物料辅助燃烧，达到污泥有机质燃烧热能的有效利用。
为实现上述目的，按照本发明的一方面，提出了一种地幔式污泥阴燃快速焚烧处置装置，包括坑体、电加热网、承重格栅、斜桥支架和布幔，其中：
所述坑体的坑壁由耐火砖围砌，坑底水平并均匀分布有经地底通向外部的通风管道，且该通风管道位于坑底的出口由粗石砾堆砌封堵，该粗石砾上铺有细砂粒并填满所述坑体；
所述电加热网埋覆于所述细砂粒中，其四周固定在坑壁上；所述承重格栅横架在所述坑体的坑面上；
所述斜桥支架横跨在所述坑体上方，其底部嵌扣在坑口处；所述布幔覆盖在所述斜桥支架上，且其底部与坑口密封连接，所述布幔上方设有烟气出口。
作为进一步优选的，所述粗石砾的粒径为3cm～5cm，所述细砂粒的粒径为1cm～2cm。
作为进一步优选的，所述坑体的深度为50cm，所述粗石砾厚度为20cm，所述细砂粒厚度为30cm，所述电加热网的埋覆深度为地面下10cm。
作为进一步优选的，所述坑体的坑壁和坑底，以及通风管道均由水泥加固并实现密封。
作为进一步优选的，所述承重格栅由不锈钢制成，其格栅呈网格状，孔隙大小为0.5cm～1.5cm。
作为进一步优选的，所述承重格栅由坑底的若干支柱提供支撑，其局部承重能力不低于5t。
作为进一步优选的，所述布幔由防火、防水、密封、隔热的材质制成，其覆盖在所述斜桥支架上并通过锁链加固。
按照本发明的另一方面，提供了一种地幔式污泥阴燃快速焚烧处置方法，其采用上述装置实现，包括如下步骤：
S1将待处理污泥与沙土混合得到掺混物，该掺混物含水率不高于20％，热值不低于0.2kJ/g；
S2将掺混物堆放在承重格栅上方，填满坑面与斜桥支架之间的空间，然后通过斜桥支架将布幔封盖在掺混物上方，使其与坑面合围成一个密闭的空间；
S3电加热网通电加热，一段时间后通过位于坑底的通风管道向坑内鼓入空气，使掺混物开始焚烧，所产生的烟气由烟气出口排出，完成污泥阴燃快速焚烧处置。
作为进一步优选的，所述S3中，电加热网通电加热后，监控电加热网上方5cm处温度，当此处温度达到300℃时，开始由通风管道向坑内鼓入空气。
作为进一步优选的，所述S3中，空气在坑内流速稳定且不低于3.5cm/s。
总体而言，通过本发明所构思的以上技术方案与现有技术相比，主要具备以下的技术优点：
1.本发明基于强迫气流下的正向阴燃传播原理，对坑体、电加热网和斜桥支架等进行设置，使底部物料燃烧产生的热量随气流方向传递至上方物料辅助燃烧，达到污泥有机质燃烧热能的有效利用，按物料堆砌高度50cm计，对60％含水率的深度脱水污泥处理效率可达70kg/m 2/h。
2.本发明对粗石砾、细砂粒的厚度，以及电加热网的埋覆深度进行了详细设计，以提高污泥焚烧效果。
3.本发明电加热网通电加热后，实时监控电加热网上方5cm处温度，以精准控制鼓入空气的时间，同时在焚烧过程中，可以选择持续加热也可以选择根据实际需要关闭电加热网节省能耗。
【附图说明】
图1为本发明实施例地幔式污泥阴燃快速焚烧处置装置结构示意图；
图2为本发明实施例地幔式污泥阴燃快速焚烧处置装置地面效果示意图；
图3为本发明实施例电加热网外形示意俯视图；
图4为本发明实施例承重格栅外形示意俯视简图。
在所有附图中，相同的附图标记用来表示相同的元件或结构，其中：1-粗石砾，2-细沙砾，3-电加热网，4-耐火砖，5-承重格栅，6-布幔，7-通风管道，8-烟气出口，9-掺混物。
【具体实施方式】
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。此外，下面所描述的本发明各个实施方式中所涉及到的技术特征只要彼此之间未构成冲突就可以相互组合。
本发明实施例提供的一种地幔式污泥阴燃快速焚烧处置装置，如图1所示，包括坑体、电加热网3、承重格栅5、斜桥支架和布幔6，其中：
所述坑体四面的坑壁由耐火砖4围砌，坑底水平，且均匀分布有经地底通向外部的通风管道7(DN10)，用于由坑底自下而上向坑内均匀通入空气；该通风管道7位于坑底的出口由粗石砾1堆砌封堵，该粗石砾1上铺有细砂粒2并填满所述坑体；优选的，所述坑体的坑壁和坑底，以及通风管道7均由水泥加固，保证密封性。
所述电加热网3埋覆于所述细砂粒2中，其四周固定在坑壁上，保持 水平，其外形如图3所示；所述承重格栅5如图4所示，其嵌在耐火砖4四壁，横架在坑面上，即其位于地面高度处，并由一层薄沙覆盖；该承重格栅5由坑底的若干支柱提供支撑，其局部承重能力不低于5t，抗压使不弯曲变形；优选的，所述承重格栅5由不锈钢制成，结构稳固，其格栅孔隙大小为0.5cm～1.5cm，进一步优选为1cm。
所述斜桥支架横跨在所述坑体上方，如图2所示，用于给布幔6提供支撑，其底部围绕坑口、嵌扣在坑口的水泥里，且斜桥支架上设计有用于紧固布幔6的锁链；所述布幔6可以契合的覆盖在所述斜桥支架上通过锁链进行加固，且布幔6通过斜桥支架底座与坑口四周的水泥凹槽实现密封连接，同时所述布幔6上方开有与烟气管道7密封连接的圆形开口作为烟气出口8；优选的，所述布幔6由防火、防水、密封、隔热的材质制成。
进一步的，所述粗石砾1的粒径为3cm～5cm，所述细砂粒2的粒径为1cm～2cm；所述坑体的深度为50cm，所述粗石砾1厚度为20cm，所述细砂粒2厚度为30cm，所述电加热网3的埋覆深度为地面下10cm。
采用上述装置进行污泥阴燃快速焚烧处置，包括如下步骤：
S1将待处理的高含水率污泥与沙土混合得到掺混物9，该掺混物9含水率不高于20％，热值不低于0.2kJ/g；
S2将掺混物9堆放在承重格栅5上方，填满坑面与斜桥支架之间的空间，然后通过斜桥支架将布幔6封盖在掺混物9上方，使其与坑面合围成一个密闭的空间；
S3电加热网3通电加热，一段时间后通过通风管道7由坑体下方向坑内鼓入大量空气，使掺混物9开始焚烧，所产生的烟气由烟气出口8排出，此时底部物料燃烧产生的热量随气流方向传递至上方物料辅助燃烧，达到污泥有机质燃烧热能的有效利用，完成污泥阴燃快速焚烧处置。
进一步的，所述S3中，电加热网(3)通电加热后，通过热电偶监控电加热网(3)上方5cm处沙土的温度，当此处温度达到300℃时，开始由 通风管道(7)向坑内鼓入大量空气，并根据实际需要调节电加热功率；空气在坑内流速稳定且不低于3.5cm/s，具体按不同物料堆放高度确定，处置速率可达70kg/m 2/h。
本领域的技术人员容易理解，以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种地幔式污泥阴燃快速焚烧处置装置，其特征在于，包括坑体、电加热网(3)、承重格栅(5)、斜桥支架和布幔(6)，其中：
    所述坑体的坑壁由耐火砖(4)围砌，坑底水平并均匀分布有经地底通向外部的通风管道(7)，且该通风管道(7)位于坑底的出口由粗石砾(1)堆砌封堵，该粗石砾(1)上铺有细砂粒(2)并填满所述坑体；
    所述电加热网(3)埋覆于所述细砂粒(2)中，其四周固定在坑壁上；所述承重格栅(5)横架在所述坑体的坑面上；
    所述斜桥支架横跨在所述坑体上方，其底部嵌扣在坑口处；所述布幔(6)覆盖在所述斜桥支架上，且其底部与坑口密封连接，所述布幔(6)上方设有烟气出口(8)。
  2. 如权利要求1所述的地幔式污泥阴燃快速焚烧处置装置，其特征在于，所述粗石砾(1)的粒径为3cm～5cm，所述细砂粒(2)的粒径为1cm～2cm。
  3. 如权利要求1所述的地幔式污泥阴燃快速焚烧处置装置，其特征在于，所述坑体的深度为50cm，所述粗石砾(1)厚度为20cm，所述细砂粒(2)厚度为30cm，所述电加热网(3)的埋覆深度为地面下10cm。
  4. 如权利要求1所述的地幔式污泥阴燃快速焚烧处置装置，其特征在于，所述坑体的坑壁和坑底，以及通风管道(7)均由水泥加固。
  5. 如权利要求1所述的地幔式污泥阴燃快速焚烧处置装置，其特征在于，所述承重格栅(5)由不锈钢制成，其格栅孔隙大小为0.5cm～1.5cm。
  6. 如权利要求1所述的地幔式污泥阴燃快速焚烧处置装置，其特征在于，所述承重格栅(5)由坑底的若干支柱提供支撑，其局部承重能力不低于5t。
  7. 如权利要求1-6任一项所述的地幔式污泥阴燃快速焚烧处置装置，其特征在于，所述布幔(6)由防火、防水、密封、隔热的材质制成，其覆盖在所述斜桥支架上并通过锁链加固。
  8. 一种地幔式污泥阴燃快速焚烧处置方法，采用如权利要求1-7任一项所述的装置实现，其特征在于，包括如下步骤：
    S1将待处理污泥与沙土混合得到掺混物(9)，该掺混物(9)含水率不高于20％，热值不低于0.2kJ/g；
    S2将掺混物(9)堆放在承重格栅(5)上方，填满坑面与斜桥支架之间的空间，然后通过斜桥支架将布幔(6)封盖在掺混物(9)上方，使其与坑面合围成一个密闭的空间；
    S3电加热网(3)通电加热，一段时间后通过位于坑底的通风管道(7)向坑内鼓入空气，使掺混物(9)开始焚烧，所产生的烟气由烟气出口(8)排出，完成污泥阴燃快速焚烧处置。
  9. 如权利要求8所述的地幔式污泥阴燃快速焚烧处置方法，其特征在于，所述S3中，电加热网(3)通电加热后，监控电加热网(3)上方5cm处温度，当此处温度达到300℃时，开始由通风管道(7)向坑内鼓入空气。
  10. 如权利要求8或9所述的地幔式污泥阴燃快速焚烧处置方法，其特征在于，所述S3中，空气在坑内流速稳定且不低于3.5cm/s。
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