CN111457396A - Mantle type sludge smoldering fast incineration disposal device and method - Google Patents
Mantle type sludge smoldering fast incineration disposal device and method Download PDFInfo
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- CN111457396A CN111457396A CN202010301789.XA CN202010301789A CN111457396A CN 111457396 A CN111457396 A CN 111457396A CN 202010301789 A CN202010301789 A CN 202010301789A CN 111457396 A CN111457396 A CN 111457396A
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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
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- 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
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- 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
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- 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
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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
The invention belongs to the field of urban waste disposal, and particularly discloses a mantle type sludge smoldering fast incineration disposal device and a mantle type sludge smoldering fast incineration disposal method, wherein the device comprises a pit body, an electric heating net, a bearing grid, an inclined bridge support and a cloth mantle, wherein: the pit wall of the pit body is surrounded by refractory bricks, ventilation pipelines which are led to the outside through the ground bottom are horizontally and uniformly distributed at the pit bottom, the outlet of the ventilation pipeline at the pit bottom is piled and plugged by coarse gravel, and fine sand grains are paved on the coarse gravel and fill the pit body; the electric heating net is buried in the fine sand grains, and the periphery of the electric heating net is fixed on the pit wall; the bearing grating is transversely arranged on the pit surface; the inclined bridge bracket spans over the pit body, and the bottom of the inclined bridge bracket is embedded and buckled at the pit opening; the cloth mantle covers on the inclined bridge support, and its bottom and adit sealing connection, are equipped with the flue gas export above the cloth mantle. Based on the forward smoldering propagation principle, the invention transfers the heat generated by the combustion of the bottom material to the upper material along the airflow direction for auxiliary combustion, thereby achieving the effective utilization of the combustion heat energy of the sludge organic matter.
Description
Technical Field
The invention belongs to the field of municipal waste disposal, and particularly relates to a mantle type sludge smoldering fast incineration disposal device and method.
Background
Sludge is one of important wastes generated by urban healthy operation, the traditional disposal mode is mainly landfill and little compost, but the traditional mode is not accepted along with the increasing shortage of urban land resources and the gradual improvement of ecological and environmental requirements. At present, the high-water content organic waste mainly has two directions: one is biological fermentation compost and the other is heat treatment, wherein the heat treatment comprises traditional heat treatment technologies such as baking, burning, pyrolysis and gasification, and novel technologies such as hydrothermal carbonization and smoldering. The biological fermentation compost treatment period is long, the sludge process with complex components is difficult to control, the volume reduction is limited, and waste liquid and waste residues are difficult to utilize. The traditional heat treatment technology has the advantages of high volume reduction, high placement rate and thorough harmlessness such as incineration, but the sludge heat value with high water content is too low, heat supply and drying are carried out before heat treatment, or the sludge heat value is mixed with fuel with high heat value for burning, the heat energy utilization rate is reduced, the treatment cost is increased, and the smoke generated at high temperature pollutes the environment and is irrevocable. Hydrothermal carbonization also has limited volume reduction, the produced carbon material is still to be upgraded for expanded applications, and in addition, hydrothermal carbonization requires a vessel with higher pressure, increasing equipment investment cost. The smoldering technology is a technology relying on self-sustaining low-temperature combustion of high-moisture organic matters, and realizes propagation of combustion and self-sustaining of reaction through heat transfer generated by oxidation reaction of organic components of the smoldering technology, so that heat treatment is realized under the condition of assistance of external low heat, and the smoldering technology is an ideal technology for treating high-moisture organic wastes such as sludge.
At present, technical equipment for sludge disposal in the market is mainly based on the traditional heat drying and incineration or co-combustion technology, and no technology and equipment based on smoldering appear. The invention relates to a device and a process for quickly incinerating and disposing high-water-content organic wastes such as sludge, which are designed and developed based on smoldering technology. Can realize large-scale batch thermal treatment of the sludge while having low energy consumption investment, and has great market application prospect.
Disclosure of Invention
Aiming at the defects or the improvement requirements of the prior art, the invention provides a mantle type sludge smoldering fast burning disposal device and a mantle type sludge smoldering fast burning disposal method, and aims to arrange a pit body, an electric heating net, an inclined bridge bracket and the like based on a forward smoldering propagation principle under forced airflow, so that heat generated by burning of bottom materials is transferred to upper materials along the airflow direction for auxiliary burning, and the effective utilization of the burning heat energy of sludge organic matters is achieved.
In order to achieve the above object, according to one aspect of the present invention, a mantle type sludge smoldering fast incineration disposal device is provided, comprising a pit body, an electric heating net, a bearing grid, an inclined bridge support and a cloth mantle, wherein:
the pit wall of the pit body is surrounded by refractory bricks, ventilation pipelines which are led to the outside through the ground bottom are horizontally and uniformly distributed at the pit bottom, the ventilation pipelines are positioned at the outlet of the pit bottom and are piled and plugged by coarse gravel, and fine sand grains are paved on the coarse gravel and are filled in the pit body;
the electric heating net is buried in the fine sand grains, and the periphery of the electric heating net is fixed on the pit wall; the bearing grating is transversely arranged on the pit surface of the pit body;
the inclined bridge bracket spans above the pit body, and the bottom of the inclined bridge bracket is embedded and buckled at the pit opening; the cloth mantle covers on the inclined bridge support, and its bottom and adit sealing connection, be equipped with the flue gas export above the cloth mantle.
More preferably, the particle size of the coarse gravel is 3cm to 5cm, and the particle size of the fine sand is 1cm to 2 cm.
More preferably, the depth of the pit body is 50cm, the thickness of the coarse gravel is 20cm, the thickness of the fine sand is 30cm, and the embedding depth of the electric heating net is 10cm below the ground.
Further preferably, the pit wall and the pit bottom of the pit body, and the ventilation pipeline are reinforced and sealed by cement.
More preferably, the load-bearing grid is made of stainless steel, the grid is in a grid shape, and the size of pores is 0.5 cm-1.5 cm.
As a further preference, the load-bearing grid is supported by a plurality of struts of the pit bottom, and the local load-bearing capacity of the load-bearing grid is not less than 5 t.
As a further preferred, the cloth screen is made of fireproof, waterproof, sealing and heat-insulating materials, covers the inclined bridge support and is reinforced through a chain.
According to another aspect of the invention, a smoldering fast incineration disposal method for mantle-type sludge is provided, which is realized by adopting the device and comprises the following steps:
s1, mixing the sludge to be treated with sandy soil to obtain a mixture, wherein the water content of the mixture is not higher than 20%, and the heat value is not lower than 0.2 kJ/g;
s2, stacking the admixture above the bearing grid, filling the space between the pit surface and the oblique bridge support, and then covering the cloth mantle above the admixture through the oblique bridge support to surround the admixture and the pit surface into a closed space;
s3 the electric heating net is electrified to heat, after a period of time, air is blown into the pit through the ventilating duct at the bottom of the pit, the mixture starts to burn, the generated smoke is discharged from the smoke outlet, and the sludge smoldering quick burning disposal is completed.
More preferably, in S3, after the electric heating net is heated by energization, the temperature 5cm above the electric heating net is monitored, and when the temperature reaches 300 ℃, air blowing from the ventilation duct into the pit is started.
More preferably, in S3, the air flow velocity in the pit is stable and is not less than 3.5 cm/S.
Generally, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:
1. the invention is based on the positive smoldering propagation principle under the forced airflow, and arranges the pit body, the electric heating net, the inclined bridge bracket and the like, so that the heat generated by the combustion of the bottom material is transferred to the upper material along the airflow direction for auxiliary combustion, thereby achieving the purpose ofThe effective utilization of the combustion heat energy of organic matters in the sludge can reach 70kg/m of treatment efficiency on the deep dehydration sludge with 60 percent of water content according to the material stacking height of 50cm2/h。
2. The invention designs the thickness of coarse gravel and fine sand and the burying depth of the electric heating net in detail so as to improve the sludge incineration effect.
3. After the electric heating net is electrified and heated, the temperature of the position 5cm above the electric heating net is monitored in real time so as to accurately control the time of blowing air, and meanwhile, in the burning process, continuous heating can be selected, and the electric heating net can be closed according to actual requirements so as to save energy consumption.
Drawings
FIG. 1 is a schematic structural view of a smoldering type sludge fast incineration disposal device according to an embodiment of the present invention;
FIG. 2 is a schematic view of the ground effect of the smoldering sludge fast incineration disposal device according to the embodiment of the present invention;
FIG. 3 is a schematic top view of an electrical heating grid configuration in accordance with an embodiment of the present invention;
figure 4 is a schematic top view of a load-bearing grid profile according to an embodiment of the present invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein: 1-coarse gravel, 2-fine gravel, 3-electric heating net, 4-refractory brick, 5-bearing grid, 6-cloth mantle, 7-ventilating duct, 8-smoke outlet and 9-admixture.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The smoldering fast incineration disposal device for the mantle type sludge provided by the embodiment of the invention is shown in figure 1 and comprises a pit body, an electric heating net 3, a bearing grid 5, an inclined bridge bracket and a cloth mantle 6, wherein:
the four sides of the pit body are surrounded by refractory bricks 4, the bottom of the pit is horizontal, and ventilation pipelines 7(DN10) leading to the outside through the ground bottom are uniformly distributed and used for uniformly introducing air into the pit from bottom to top; the outlet of the ventilation pipeline 7 positioned at the bottom of the pit is plugged by piling up coarse gravel 1, fine sand grains 2 are paved on the coarse gravel 1 and the pit body is filled with the fine sand grains; preferably, the pit wall and the pit bottom of the pit body and the ventilation pipeline 7 are reinforced by cement, so that the sealing performance is ensured.
The electric heating net 3 is buried in the fine sand grains 2, the periphery of the electric heating net is fixed on the pit wall and kept horizontal, and the shape of the electric heating net is shown in figure 3; the load-bearing grid 5 is embedded in the four walls of the refractory brick 4, is erected on the pit surface, i.e. is located at the ground level and is covered by a layer of thin sand, as shown in figure 4; the bearing grid 5 is supported by a plurality of pillars at the bottom of the pit, the local bearing capacity is not lower than 5t, and the bearing grid is resistant to pressure and does not bend and deform; preferably, the load-bearing grid 5 is made of stainless steel, the structure is stable, and the size of the grid pores is 0.5 cm-1.5 cm, and more preferably 1 cm.
The inclined bridge bracket spans over the pit body and is used for supporting the cloth screen 6 as shown in fig. 2, the bottom of the inclined bridge bracket surrounds the pit opening and is embedded and buckled in cement of the pit opening, and a chain for fastening the cloth screen 6 is designed on the inclined bridge bracket; the cloth curtain 6 can be fittingly covered on the inclined bridge support and is reinforced through a chain, the cloth curtain 6 is hermetically connected with cement grooves around the pithead through an inclined bridge support base, and meanwhile, a circular opening hermetically connected with a flue gas pipeline 7 is formed above the cloth curtain 6 and serves as a flue gas outlet 8; preferably, the cloth curtain 6 is made of fireproof, waterproof, sealing and heat-insulating materials.
Further, the particle size of the coarse gravel 1 is 3 cm-5 cm, and the particle size of the fine sand 2 is 1 cm-2 cm; the depth of the pit body is 50cm, the thickness of the coarse gravel 1 is 20cm, the thickness of the fine sand grains 2 is 30cm, and the embedding depth of the electric heating net 3 is 10cm below the ground.
Adopt above-mentioned device to carry out the quick incineration of mud smoldering and handle, include the following step:
s1, mixing the sludge with high water content to be treated with sandy soil to obtain a mixture 9, wherein the water content of the mixture 9 is not higher than 20%, and the heat value is not lower than 0.2 kJ/g;
s2, stacking the blend 9 above the bearing grid 5 to fill the space between the pit surface and the inclined bridge support, and then sealing the cloth mantle 6 above the blend 9 through the inclined bridge support to surround the blend and the pit surface into a closed space;
s3 the electric heating net 3 is electrified to heat, after a period of time, a large amount of air is blown into the pit from the lower part of the pit body through the ventilation pipeline 7, the mixture 9 starts to burn, the generated smoke is discharged from the smoke outlet 8, the heat generated by the combustion of the bottom material is transferred to the upper material along the airflow direction to assist the combustion, the effective utilization of the combustion heat energy of the organic matter of the sludge is achieved, and the quick incineration disposal of the sludge smoldering is completed.
Further, in the step S3, after the electric heating net (3) is electrified and heated, the temperature of the sandy soil 5cm above the electric heating net (3) is monitored by a thermocouple, when the temperature reaches 300 ℃, a large amount of air starts to be blown into the pit through the ventilation pipeline (7), and the electric heating power is adjusted according to actual needs; the air flow velocity in the pit is stable and is not lower than 3.5cm/s, the air flow velocity is determined according to the stacking heights of different materials, and the disposal velocity can reach 70kg/m2/h。
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a mantle formula mud smoldering burns processing apparatus fast, its characterized in that, includes the pit body, electric heating net (3), bearing grid (5), inclined bridge support and cloth mantle (6), wherein:
the pit wall of the pit body is surrounded by refractory bricks (4), ventilation pipelines (7) which are led to the outside through the ground bottom are horizontally and uniformly distributed at the pit bottom, the ventilation pipelines (7) are positioned at the outlet of the pit bottom and are piled and plugged by coarse gravel (1), and fine sand grains (2) are paved on the coarse gravel (1) and fill the pit body;
the electric heating net (3) is buried in the fine sand grains (2), and the periphery of the electric heating net is fixed on the pit wall; the bearing grating (5) is transversely arranged on the pit surface of the pit body;
the inclined bridge bracket spans above the pit body, and the bottom of the inclined bridge bracket is embedded and buckled at the pit opening; the cloth mantle (6) covers on the inclined bridge support, and its bottom and adit sealing connection, be equipped with flue gas export (8) above cloth mantle (6).
2. The smoldering sludge fast incineration disposal device of claim 1, wherein the particle size of said coarse gravel (1) is 3cm to 5cm, and the particle size of said fine sand particles (2) is 1cm to 2 cm.
3. The mantle type sludge smoldering fast incineration disposal device of claim 1, wherein a depth of said pit body is 50cm, a thickness of said coarse gravel (1) is 20cm, a thickness of said fine sand particles (2) is 30cm, and a buried depth of said electric heating net (3) is 10cm below the ground.
4. The mantle type sludge smoldering fast incineration disposal device as claimed in claim 1, wherein the pit wall and the pit bottom of the pit body, and the ventilation duct (7) are reinforced by cement.
5. The smoldering fast incineration disposal device of claim 1, characterized in that said load-bearing grid (5) is made of stainless steel and its grid pore size is 0.5 cm-1.5 cm.
6. The smoldering sludge fast incineration disposal device of claim 1, characterized in that said load-bearing grid (5) is supported by a plurality of pillars of the pit bottom, and its local load-bearing capacity is not less than 5 t.
7. The smoldering sludge fast incineration disposal device of any of the claims 1-6, characterized in that said cloth screen (6) is made of fireproof, waterproof, sealing, heat insulating material, which covers said inclined bridge support and is reinforced by chain.
8. A smoldering fast incineration disposal method for mantle-type sludge, which is realized by adopting the device as claimed in any one of claims 1-7, and is characterized by comprising the following steps:
s1, mixing the sludge to be treated with sandy soil to obtain a blend (9), wherein the water content of the blend (9) is not higher than 20%, and the heat value is not lower than 0.2 kJ/g;
s2, stacking the blend (9) above the bearing grid (5), filling the space between the pit surface and the oblique bridge support, and then covering the cloth mantle (6) above the blend (9) through the oblique bridge support to surround the blend and the pit surface into a closed space;
s3 the electric heating net (3) is electrified and heated, after a period of time, air is blown into the pit through the ventilating duct (7) at the bottom of the pit, the mixture (9) starts to burn, the generated smoke is discharged from the smoke outlet (8), and the sludge smoldering quick burning treatment is completed.
9. The smoldering fast incineration disposal method of the mantle type sludge as claimed in claim 8, wherein in S3, after the electric heating net (3) is heated by electricity, the temperature 5cm above the electric heating net (3) is monitored, and when the temperature reaches 300 ℃, air starts to be blown into the pit through the ventilation pipe (7).
10. The smoldering fast incineration disposal method of mantle sludge as claimed in claim 8 or 9, wherein in said S3, the air flow velocity in the pit is stable and not lower than 3.5 cm/S.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010301789.XA CN111457396A (en) | 2020-04-16 | 2020-04-16 | Mantle type sludge smoldering fast incineration disposal device and method |
| PCT/CN2020/136040 WO2021208466A1 (en) | 2020-04-16 | 2020-12-14 | Mantle type sludge smoldering rapid incineration disposal device and method |
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| CN202010301789.XA CN111457396A (en) | 2020-04-16 | 2020-04-16 | Mantle type sludge smoldering fast incineration disposal device and method |
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| CN111457396A true CN111457396A (en) | 2020-07-28 |
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| WO (1) | WO2021208466A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112762458A (en) * | 2020-12-30 | 2021-05-07 | 华中科技大学 | Smoldering ignition optimization method for organic solid waste and smoldering furnace |
| WO2021208466A1 (en) * | 2020-04-16 | 2021-10-21 | 华中科技大学 | Mantle type sludge smoldering rapid incineration disposal device and method |
| WO2022142098A1 (en) * | 2020-12-30 | 2022-07-07 | 华中科技大学 | Low-calorific-value sludge smoldering treatment method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114460983B (en) * | 2022-01-26 | 2023-07-28 | 浙江浙能嘉华发电有限公司 | Comprehensive humidity factor-based sludge blending proportion control method |
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| JPS55128718A (en) * | 1979-03-28 | 1980-10-04 | Teruie Fujiwara | Combustion furnace for heating |
| CN108916889A (en) * | 2018-05-21 | 2018-11-30 | 永清环保股份有限公司 | A kind of dystopy greasy filth nonflame smouldering processing unit and processing method |
| CA3064997A1 (en) * | 2017-05-30 | 2018-12-06 | Chevron U.S.A. Inc. | System and method for thermal destruction of undesired substances by smoldering combustion |
| CN109073216A (en) * | 2016-04-19 | 2018-12-21 | 吉奥森泰克咨询公司 | The method for being generated by smouldering or recycling substance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109290353B (en) * | 2018-09-29 | 2021-08-10 | 江苏大地益源环境修复有限公司 | Solid waste treatment method based on mobile skid-mounted organic solid waste treatment device |
| CN111457396A (en) * | 2020-04-16 | 2020-07-28 | 华中科技大学 | Mantle type sludge smoldering fast incineration disposal device and method |
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2020
- 2020-04-16 CN CN202010301789.XA patent/CN111457396A/en active Pending
- 2020-12-14 WO PCT/CN2020/136040 patent/WO2021208466A1/en active Application Filing
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| JPS55128718A (en) * | 1979-03-28 | 1980-10-04 | Teruie Fujiwara | Combustion furnace for heating |
| CN109073216A (en) * | 2016-04-19 | 2018-12-21 | 吉奥森泰克咨询公司 | The method for being generated by smouldering or recycling substance |
| CA3064997A1 (en) * | 2017-05-30 | 2018-12-06 | Chevron U.S.A. Inc. | System and method for thermal destruction of undesired substances by smoldering combustion |
| CN108916889A (en) * | 2018-05-21 | 2018-11-30 | 永清环保股份有限公司 | A kind of dystopy greasy filth nonflame smouldering processing unit and processing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021208466A1 (en) * | 2020-04-16 | 2021-10-21 | 华中科技大学 | Mantle type sludge smoldering rapid incineration disposal device and method |
| CN112762458A (en) * | 2020-12-30 | 2021-05-07 | 华中科技大学 | Smoldering ignition optimization method for organic solid waste and smoldering furnace |
| WO2022142098A1 (en) * | 2020-12-30 | 2022-07-07 | 华中科技大学 | Low-calorific-value sludge smoldering treatment method |
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| WO2021208466A1 (en) | 2021-10-21 |
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