Porous filling material structure for self-sustaining smoldering reaction and its application

Abstract

The present invention belongs to the technical field related to smoldering treatment, and discloses a porous filling material structure for self-sustaining smoldering reaction and its application, the structure comprising: at least one microtube structure with a plurality of small through holes on the surface, the aperture of the small through hole is 0.8mm-4mm. On the one hand, the through holes on the microtubes of the porous microtube structure of the present application can meet the requirements of air entry and propagation in the smoldering reaction, and on the other hand, the folded gap of the microtube structure itself is used to fill high-water content organic solid waste, so that the small holes are in contact with the high-water content organic solid waste, providing sufficient oxygen for its smoldering combustion reaction; on the other hand, the small aperture of the through hole in the present application can hinder the infiltration of high-water content organic solid waste into the ventilation structure.

Description

Technical Field

[0001] The present invention belongs to the technical field related to smoldering treatment, and more specifically, relates to a porous filling material structure for self-sustaining smoldering reaction and application thereof. Background Art

[0002] With the development of the economy, solid waste is also increasing year by year, and the number is still rising, causing great pressure and harm to the environment. More than half of them are organic solid waste with high water content. If improperly handled, they are easy to spread viruses and pathogens, further endangering human safety. How to efficiently, greenly and resourcefully treat solid waste has become a difficult problem. At present, the main means of treating solid waste is incineration, which is thorough, efficient and widely used. However, the characteristics of high water content and low calorific value of organic solid waste make traditional disposal processes often consume huge energy and cause serious pollution, making them difficult to promote.

[0003] Smoldering is a new treatment technology for organic solid waste with high water content. It uses heat storage materials to form a mixed matrix with a porous structure to optimize the chemical reaction process of organic solid waste with high water content, and realizes low-temperature self-sustaining combustion treatment of organic matter without drying or adding auxiliary fuel. Smoldering technology provides a new technology for harmless and resource-based treatment of organic solid waste, and has great development potential.

[0004] The traditional smoldering reaction process requires the use of heat storage inert materials to form a mixed matrix with a porous structure to ensure the occurrence of the smoldering combustion reaction of high-water-content organic solid waste. During the process, it is necessary to continuously use heat storage inert materials and fully mix the heat storage inert materials with high-water-content organic solid waste to ensure that they form a mixed matrix with a porous structure. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a porous filling material structure for self-sustaining smoldering reaction, which realizes the entry and propagation of air in the smoldering reaction through a microtube structure with multiple small through holes, thereby making the smoldering reaction self-sustaining.

[0006] To achieve the above objectives, according to one aspect of the present invention, a porous filling material structure for self-sustaining smoldering reaction is provided, the structure comprising: at least one microtube structure with a plurality of small through holes on the surface, the pore size of the small through holes being 0.8mm-4mm.

[0007] Preferably, the micro-tube structure is made of flexible material, so that the micro-tube structure can be staggered and folded in the smoldering stove.

[0008] Preferably, the microtube structure is a heat storage material

[0009] Preferably, the material of the micro-tube structure is silicon nitride material.

[0010] Preferably, the small through hole is circular or elliptical.

[0011] Preferably, the small through hole has a double trumpet-shaped structure, wherein the small mouth ends of the two trumpets are connected.

[0012] Preferably, a plurality of small through holes are arranged in a staggered manner on the surface of the microtube structure.

[0013] Preferably, the microtube structure is a hollow structure in the axial direction.

[0014] Preferably, a plurality of small through-hole arrays are regularly arranged on the surface of the microtube structure.

[0015] On the other hand, the present application provides an application of a porous filling material structure for self-sustaining smoldering reaction, wherein the microtube structure is staggered and folded and arranged in the combustion zone of the smoldering furnace, so that organic solid waste is filled in the staggered and folded gaps of the microtube structure.

[0016] In general, compared with the prior art, the above technical solution conceived by the present invention provides a porous filling material structure for self-sustaining smoldering reaction and its application, which has the following beneficial effects:

[0017] 1. The porous microtube structure of the present application, on the one hand, the through holes on the microtubes can meet the requirements of the air entry and propagation in the smoldering reaction, and on the other hand, the folded gaps of the microtube structure itself are used to fill high-water-content organic solid waste, so that the small hole port is in contact with the high-water-content organic solid waste, providing sufficient oxygen for its smoldering combustion reaction; on the other hand, the aperture of the through hole in the present application is 0.8mm-4mm, which is relatively small, which can hinder the infiltration of high-water-content organic solid waste into the ventilation structure.

[0018] 2. The microtube structure is a heat storage flexible material, so that on the one hand, the microtube structure can be staggered together in a certain way to form a dense staggered structure, which can allow the air to enter from the bottom and flow to every place in the structure, ensuring that the high-water content organic solid waste can fully contact with the air; on the other hand, the heat storage material can make the heat generated by the smoldering combustion reaction be fully absorbed by the upper layer of high-water content organic solid waste, thereby realizing the formation of a porous matrix of high-water content organic solid waste without the aid of heat storage inert materials, and then realizing the stable smoldering combustion reaction of high-water content organic solid waste, thereby ensuring the successful and stable progress of the smoldering combustion reaction, improving the smoldering self-sustaining ability, and reducing the energy consumption of the system.

[0019] 3. The small through holes are round or oval, making the inside of the through holes smooth, which is conducive to the spread of air without collecting dust, thereby reducing the probability of blockage.

[0020] 4. The small through hole is double trumpet-shaped, which is convenient for air circulation and the removal of dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a porous filling material structure for self-sustaining smoldering reaction according to an embodiment of the present application;

[0022] Figure 2 It is a schematic diagram of the interlaced folding of a porous filling material structure for self-sustaining smoldering reaction in an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] See also Figure 1 and Figure 2 The present invention provides a porous filling material structure for self-sustaining smoldering reaction, the structure comprising at least one microtube structure with a plurality of small through holes on the surface, the aperture of the small through hole is 0.8mm-4mm. Each microtube structure surface has a plurality of through holes with very small apertures, which not only realizes the contact between air and high-water organic solid waste, and provides sufficient oxygen for its smoldering combustion reaction, but also because its aperture is small enough, it is difficult for high-water organic solid waste to penetrate into the small through holes due to its surface tension.

[0025] Further preferably, the micro-tube structure is composed of a heat storage flexible material. On the one hand, the flexibility is easy to fold, so that the micro-tube structure can be folded in any way in the smoldering furnace, and then the dense interlaced structure composed of the micro-tube structure can be designed and matched according to the structure of the furnace body, so that it can completely fit the furnace body of the smoldering combustion reaction, ensuring that the high-water organic solid waste is confined by the inner wall of the furnace body in the dense interlaced structure gap to form a matrix with porous characteristics. On the other hand, it is made of a material with a certain heat storage capacity, which can prevent the heat generated by the smoldering combustion reaction from being lost too quickly, ensuring that the heat generated by the smoldering combustion reaction of the high-water organic solid waste in the lower layer is fully absorbed by the high-water organic solid waste in the upper layer, thereby ensuring the successful and stable progress of the smoldering combustion reaction, improving the smoldering self-sustaining ability, and reducing the energy consumption of the system.

[0026] Further preferably, the material of the micro-tube structure is silicon nitride material.

[0027] Further preferably, the small through hole is circular or elliptical, or the structure of the small through hole is double trumpet-shaped, wherein the small mouth ends of two trumpets are connected.

[0028] Further preferably, the microtube structure is a hollow structure in the axial direction.

[0029] A plurality of small through holes are arranged in a staggered manner on the surface of the microtube structure, or a plurality of small through hole arrays are regularly arranged on the surface of the microtube structure.

[0030] The microtube structure is used as a ventilation structure for the entry and propagation of air in the smoldering reaction. Each microtube structure has a plurality of circular holes with very small apertures on its surface. The circular holes are used for the contact between air and high-water-content organic solid waste to provide sufficient oxygen for its smoldering combustion reaction. At the same time, the circular holes can also hinder the infiltration of high-water-content organic solid waste into the ventilation structure because of their apertures between 0.8mm and 4mm. The microtube structures are staggered together in a certain manner to form a dense staggered structure, which allows the introduced air to enter from below and circulate to every place in the structure, ensuring that the high-water-content organic solid waste can fully contact with the air.

[0031] On the other hand, the present application provides an application of a porous filling material structure for self-sustaining smoldering reaction, wherein the microtube structure is staggered and folded and arranged in the combustion zone of the smoldering furnace, so that organic solid waste is filled in the staggered and folded gaps of the microtube structure.

[0032] The densely interlaced structure composed of the microtube structure has gaps outside for filling high-water-content organic solid waste. The high-water-content organic solid waste is in full contact with the surface of the microtube structure in the structure to form a matrix with porous characteristics, thereby achieving a smoldering combustion reaction of the high-water-content organic solid waste in the structure.

[0033] The present invention provides a structure of a porous filling material for a self-sustaining smoldering reaction, which can form a matrix with porous properties without adding a heat storage inert medium material for mixing and stirring high-water-content organic solid waste. While achieving a smoldering combustion reaction of the high-water-content organic solid waste, the use of the heat storage inert medium material and part of the process flow are saved.

[0034] The present invention provides a structure for forming a porous matrix of high-water-content organic solid waste. The ventilation microtube structure adopts a material with high heat storage, which can prevent the heat generated by the smoldering combustion reaction from being lost too quickly, ensuring that the heat generated by the smoldering combustion reaction of the high-water-content organic solid waste in the lower layer can be fully absorbed by the high-water-content organic solid waste in the upper layer, thereby ensuring the successful and stable progress of the smoldering combustion reaction, improving the smoldering self-sustaining ability, and reducing the energy consumption of the system.

[0035] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A porous filling material structure for self-sustaining smoldering reaction, characterized in that: The structure comprises: At least one microtube structure with a plurality of small through holes on the surface, wherein the diameter of the small through holes is 0.8 mm to 4 mm; The micro-tube structure is made of flexible material, so that the micro-tube structure can be staggered and folded in the smoldering stove.

2. The structure according to claim 1, characterized in that: The micro-tube structure is a heat storage material.

3. The structure according to claim 1 or 2, characterized in that: The material of the micro-tube structure is silicon nitride material.

4. The structure according to claim 1, characterized in that The small through hole is circular or elliptical.

5. The structure according to claim 1, characterized in that: The structure of the small through hole is a double trumpet shape, wherein the small mouth ends of the two trumpets are connected.

6. The structure according to claim 1, characterized in that A plurality of small through holes are arranged in a staggered manner on the surface of the micro-tube structure.

7. The structure according to claim 1, characterized in that The microtubule structure is a hollow structure in the axial direction.

8. The structure according to claim 1, characterized in that A plurality of small through-hole arrays are regularly arranged on the surface of the micro-tube structure.

9. Use of a porous filling material structure for a self-sustaining smoldering reaction, characterized in that: Based on the porous filling material structure for self-sustaining smoldering reaction described in any one of claims 1 to 8, the microtube structure is staggered and folded and arranged in the combustion zone of the smoldering furnace, so that organic solid waste is filled in the staggered and folded gaps of the microtube structure.

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