Vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace

Abstract

The invention discloses a vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace, belongs to the technical field of hazardous waste treatment, and aims at solving the problems that in the prior art, a large amount of dioxin is generated by incineration of antibiotic mushroom dregs, the environment is polluted, the comprehensive utilization rate of the antibiotic mushroom dregs is low, and the treatment cost is high. The integrated furnace comprises a furnace body and a main fan, an inner cavity of the furnace body is divided into a drying area, an oxygen-limited thermal decomposition area, a carbonization area, an oxygen-enriched combustion area, a melting area and a discharging area from top to bottom, a mushroom dreg feeding port is formed in the side wall of the drying area, a pyrolysis gas outlet is formed in the oxygen-limited thermal decomposition area, and the main fan is connected with the melting area and supplies air or oxygen into the oxygen-enriched combustion area through the melting area. The method can be used for mushroom dreg treatment.

Description

Technical Field

[0001] The invention belongs to the technical field of hazardous waste treatment, and in particular relates to a vertical integrated furnace for pyrolysis carbonization and oxygen-limited combustion. Background Art

[0002] The fungal residue produced during the production of antibiotic raw materials is a hazardous waste, which contains residual antibiotics. It usually needs to be transported to an enterprise with the corresponding hazardous waste disposal qualifications for incineration by a special vehicle equipped with GPS and other monitoring equipment.

[0003] At present, incinerators are usually used to incinerate antibiotic residues. However, a large amount of dioxins will be produced during the incineration process, causing secondary environmental pollution. In addition, the transportation and incineration costs are high, resulting in high treatment costs for antibiotic residues and low comprehensive utilization rates. Summary of the invention

[0004] In view of the above analysis, the present invention aims to provide an integrated furnace of vertical pyrolysis carbonization and oxygen-limited combustion to solve the problems in the prior art that the incineration of antibiotic slag produces a large amount of dioxins that pollute the environment, the comprehensive utilization rate of antibiotic slag is low, and the processing cost is high.

[0005] The purpose of the present invention is mainly achieved through the following technical solutions.

[0006] The present invention provides an integrated vertical pyrolysis carbonization and oxygen-limited combustion furnace, comprising a furnace body and a main fan; the inner cavity of the furnace body is divided into a drying zone, an oxygen-limited thermal decomposition zone, a carbonization zone, an oxygen-enriched combustion zone, a melting zone and a discharge zone from top to bottom, a mushroom residue feed inlet is provided on the side wall of the drying zone, a pyrolysis gas outlet is provided in the oxygen-limited thermal decomposition zone, the main fan is connected to the melting zone, and the main fan supplies air or oxygen into the oxygen-enriched combustion zone through the melting zone.

[0007] Furthermore, the pyrolysis gas outlet of the oxygen-limited thermal decomposition zone is connected to an induced draft fan.

[0008] Furthermore, an air inlet for the thermal decomposition zone is provided in the oxygen-limited thermal decomposition zone, and the air inlet for the thermal decomposition zone is connected to the auxiliary fan.

[0009] Furthermore, a first grate is provided between the oxygen thermal decomposition zone and the carbonization zone.

[0010] Furthermore, a second grate is provided between the melting zone and the discharge zone.

[0011] Furthermore, the integrated furnace also includes a distribution plate arranged below the first grate, and distribution holes are provided on the distribution plate.

[0012] Furthermore, the distribution plate is in a conical shape.

[0013] Furthermore, the integrated furnace also includes a feed hopper and a screw feeder, and the feed hopper is connected to the mushroom residue feed port through the screw feeder.

[0014] Furthermore, the integrated furnace also includes a plurality of combustion chambers connected to the pyrolysis gas outlets.

[0015] Furthermore, the integrated furnace also includes a heat exchanger arranged on the connecting pipeline between the main fan and the melting zone, the air outlet of the main fan is connected to the melting zone through the cold air pipeline of the heating pipeline, and the air outlet of the combustion chamber is connected to the hot air inlet of the heat exchanger.

[0016] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0017] A) The vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace provided by the present invention adopts multi-temperature layered combustion and a combination of oxygen-limited and oxygen-enriched methods, which can effectively improve the utilization rate of antibiotic bacterial slag and reduce processing costs. Basically, no dioxins are generated during the processing process, which can effectively prevent the occurrence of secondary pollution and protect the environment.

[0018] B) The vertical integrated furnace of pyrolysis carbonization and oxygen-limited combustion provided by the present invention can produce combustible pyrolysis gas by thermal decomposition of organic matter through oxygen-limited combustion, and the pyrolysis gas can be used later to fully utilize the energy in the fungus residue. At the same time, only a small amount of dioxin will be produced during the oxygen-limited pyrolysis process.

[0019] C) The vertical integrated furnace of pyrolysis carbonization and oxygen-limited combustion provided by the present invention can further utilize the fungus residue through subsequent carbonization and oxygen-enriched combustion. The heat generated can provide heat for the carbonization zone, oxygen-limited pyrolysis zone and drying zone. At the same time, no dioxins are generated during the oxygen-enriched combustion process.

[0020] D) In ​​the vertical integrated furnace of pyrolysis carbonization and oxygen-limited combustion provided by the present invention, pyrolysis gas passes through multiple combustion chambers in sequence, and air is supplied into the multiple combustion chambers at the same time, so as to realize high-temperature staged combustion of pyrolysis gas, and can realize full combustion and cleanness of pyrolysis gas; the high-temperature gas discharged from the combustion chamber and the air supplied to the melting zone by the main fan are preheated to avoid overcooling of the melting zone and extinction of the flame in the oxygen-rich combustion zone.

[0021] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the embodiments of the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0023] Figure 1 A schematic diagram of the structure of a vertical integrated furnace for pyrolysis carbonization and oxygen-limited combustion provided in Example 1 of the present invention;

[0024] Figure 2 A schematic diagram of the arrangement of multiple combustion chambers in a vertical integrated furnace for pyrolysis carbonization and oxygen-limited combustion provided in the second embodiment of the present invention;

[0025] Figure 3 A schematic diagram of the structure of a vertical integrated furnace for pyrolysis carbonization and oxygen-limited combustion provided in Embodiment 3 of the present invention;

[0026] Figure 4 This is a schematic structural diagram of a pressing and dehydration unit in a vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace provided in Example 3 of the present invention.

[0027] Reference numerals:

[0028] 101-vertical reciprocating drive; 102-filtering chamber; 1021-inner chamber; 1022-outer chamber; 1023-heating element; 103-extrusion roller; 104-filtering wrapping layer;

[0029] 201-drying zone; 202-oxygen-limited thermal decomposition zone; 203-carbonization zone; 204-oxygen-enriched combustion zone; 205-melting zone; 206-discharging zone; 207-main fan; 208-induced draft fan; 209-auxiliary fan; 2010-first grate; 2011-second grate; 2012-distributing plate; 2013-baffle; 2014-feed hopper; 2015-screw feeder; 2016-first combustion chamber; 2017-second combustion chamber; 2018-third combustion chamber; 2019-fourth combustion chamber; 2020-drying drum furnace; 2021-granulation unit; 2022-blower. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0031] Embodiment 1

[0032] This embodiment provides a vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace, see Figure 1, including a furnace body and a main fan 207. The inner cavity of the furnace body is divided into a drying zone 201, an oxygen-limited thermal decomposition zone 202, a carbonization zone 203, an oxygen-enriched combustion zone 204, a melting zone 205 and a discharge zone 206 from top to bottom. A mushroom residue feed port is provided on the side wall of the drying zone 201, a pyrolysis gas outlet is provided in the oxygen-limited thermal decomposition zone 202, and the main fan 207 is connected to the melting zone 205. The main fan 207 supplies air or oxygen to the oxygen-enriched combustion zone 204 through the melting zone 205.

[0033] During the implementation, the fungus residue particles (containing antibiotics, aluminosilicate and corn residue) with a moisture content of 15% to 20% are fed into the drying zone 201 from the fungus residue feed port. The temperature of the drying zone 201 is 180 to 250° C. In the drying zone 201, the hot air dries the fungus residue particles. Under the action of gravity, the fungus residue particles fall and sequentially pass through the oxygen-limited thermal decomposition zone 202, the carbonization zone 203, the oxygen-enriched combustion zone 204, the melting zone 205 and the discharge zone 206. Specifically, the temperature of the oxygen-limited thermal decomposition zone 202 is 450 to 550° C. In the oxygen-limited thermal decomposition zone 202, the fungus residue particles undergo thermal decomposition, and basically no dioxins are generated. The thermal decomposition process generates pyrolysis gas (including CO, H 2 、NO X and SO X ), the pyrolysis gas is discharged from the oxygen-limited pyrolysis zone 202 through the pyrolysis gas outlet, and the pyrolyzed fungus residue particles fall into the carbonization zone 203; the temperature of the carbonization zone 203 is 850-950°C, in the carbonization zone 203, the pyrolyzed fungus residue particles are carbonized, further deep pyrolysis and baking are achieved, and a coking state is obtained to obtain carbonized particles, which fall into the oxygen-enriched combustion zone 204; the temperature of the oxygen-enriched combustion zone 204 is 1250-1350°C, in the oxygen-enriched combustion zone 204 The carbonized particles are in a smoldering state, and the combustion releases heat. The generated heat is transferred upward to provide heat for the carbonization zone 203, the oxygen-limited thermal decomposition zone 202 and the drying zone 201. The burned particles fall into the melting zone 205; the temperature of the melting zone 205 is 1450-1550°C. In the melting zone 205, the aluminum silicate and other substances in the burned particles melt to form a hard and dense glass shell, which can wrap heavy metals, etc., to achieve the solidification and non-toxic and harmless treatment of heavy metals.

[0034] Compared with the prior art, the integrated vertical pyrolysis carbonization and oxygen-limited combustion furnace provided in this embodiment adopts multi-temperature stratified combustion and a combination of oxygen limitation and oxygen enrichment, which can effectively improve the utilization rate of antibiotic bacterial slag and reduce processing costs. Basically, no dioxins are generated during the processing process, which can effectively prevent the occurrence of secondary pollution and protect the environment.

[0035] Specifically, on the one hand, through oxygen-limited combustion, organic matter is thermally decomposed to produce combustible pyrolysis gas, which can be subsequently utilized to fully utilize the energy in the fungus residue. At the same time, only a small amount of dioxin will be produced during the oxygen-limited pyrolysis process. On the other hand, through the subsequent carbonization and oxygen-enriched combustion, the fungus residue can be further utilized, and the heat generated can provide heat for the carbonization zone 203, the oxygen-limited thermal decomposition zone 202 and the drying zone 201. At the same time, no dioxin will be produced during the oxygen-enriched combustion process.

[0036] It should be noted that dioxins are a class of highly toxic tricyclic aromatic organic compounds. The most toxic one is 2,3,7,8-tetrachlorodibenzo-p-dioxin, which is 1,000 times more toxic than potassium cyanide (KCN). Therefore, it is called "the most toxic poison on earth." Once it penetrates into the environment, it is difficult to degrade and eliminate naturally, so it is known as the "poison of the century."

[0037] Organic hazardous wastes such as biomass, antibiotic pharmaceutical residues, and domestic garbage usually contain a large amount of chlorine, which is easy to produce dioxin-containing pollutant gases in traditional incinerators. The main generation temperature range of dioxin incineration process is between 250 and 500°C, among which 300 to 450°C is the peak temperature range for dioxin generation. When the incineration temperature reaches above 800°C, dioxins and their precursors can be completely decomposed, which can reduce the amount of dioxin produced. The internationally recognized incineration control standard is a residence time of 850°C ≥ 2 seconds. However, the combustion temperature of organic hazardous waste is usually lower than 500°C, and it is difficult to maintain a high temperature of 850°C in the incinerator. This is the dilemma of existing incineration technology that is difficult to avoid dioxin generation.

[0038] The process of producing dioxins by incinerating organic hazardous waste is controlled by temperature and oxygen content. This embodiment avoids the production of dioxins by increasing the temperature and limiting oxygen conditions, changing the thermal treatment of organic hazardous waste to oxygen-limited pyrolysis treatment, forming a reductive process, and preventing and controlling the formation of chemical chains of dioxins; the carbon content of hazardous waste after pyrolysis increases sharply, and the energy density is greatly improved. It can further control oxygen combustion to obtain a high combustion temperature of 1300°C, and again avoid the generation of dioxins. Among them, the heat energy generated by combustion is used to supply energy for anaerobic pyrolysis, realizing energy cascade utilization.

[0039] In order to facilitate the discharge of pyrolysis gas, the pyrolysis gas outlet of the above-mentioned oxygen-limited pyrolysis zone 202 is connected to the induced draft fan 208, and the pyrolysis gas generated in the oxygen-limited pyrolysis zone 202 is drawn out of the integrated furnace by the induced draft fan 208, thereby achieving smooth discharge of the pyrolysis gas.

[0040] It is worth noting that the setting of the induced draft fan 208 will cause suction on the airflow in the furnace body. In order to avoid drawing the flame in the combustion zone to the carbonization zone 203 and the oxygen-limited thermal decomposition zone 202, which would cause the slag particles to burn prematurely and produce pollutants such as dioxins, the above-mentioned oxygen-limited thermal decomposition zone 202 is provided with a thermal decomposition zone air inlet, which is connected to the auxiliary fan 209 to supply appropriate airflow (for example, air) into the oxygen-limited thermal decomposition zone 202, thereby avoiding excessive negative pressure in the oxygen-limited thermal decomposition zone 202.

[0041] In order to control the falling speed of the mushroom slag particles to ensure that the reaction can be fully carried out, a first grate 2010 is provided between the above-mentioned oxygen thermal decomposition zone and the carbonization zone 203, and a second grate 2011 is provided between the melting zone 205 and the discharge zone 206. The setting of the first grate 2010 and the second grate 2011 can better control the falling speed of the mushroom slag particles so as to better carry out oxygen-limited thermal decomposition and melting.

[0042] In order to achieve uniform distribution, the above-mentioned integrated furnace of vertical pyrolysis carbonization and oxygen-limited combustion also includes a distribution plate 2012 arranged below the first grate 2010, and distribution holes are opened on the distribution plate 2012. The shape of the distribution plate 2012 is conical. The fungus slag particles after thermal decomposition fall on the distribution plate 2012 after passing through the grate, and are evenly dispersed to the carbonization zone 203 and the oxygen-enriched combustion zone 204 along the conical distribution plate 2012.

[0043] Taking into account that the drying zone 201, the oxygen-limited thermal decomposition zone 202, the carbonization zone 203, the oxygen-enriched combustion zone 204, the melting zone 205 and the discharge zone 206 are arranged in the same furnace body and are interconnected, in order to achieve oxygen-limited thermal decomposition and oxygen-enriched combustion, the above-mentioned vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace also includes a baffle 2013 arranged between the oxygen-enriched combustion zone 204 and the discharge zone 206. Through the setting of the baffle 2013, the air supplied to the melting zone 205 can be shielded so as to achieve oxygen-limited thermal decomposition and oxygen-enriched combustion.

[0044] In order to further control oxygen-limited thermal decomposition and oxygen-enriched combustion, the radial projections of the baffle 2013 and the distribution plate 2012 in the furnace body completely cover the radial cross-section of the furnace body. In this way, the baffle 2013 and the distribution plate 2012 cooperate with each other, which can not only ensure that the air supplied from the melting zone 205 can flow smoothly to the oxygen-enriched combustion zone 204, but also prevent the air from directly flowing into the oxygen-limited thermal decomposition zone 202.

[0045] In order to achieve continuous feeding of the integrated furnace for vertical pyrolysis carbonization and oxygen-limited combustion, it also includes a feed hopper 2014 and a screw feeder 2015. The feed hopper 2014 is connected to the mushroom residue feed port through the screw feeder 2015. The feed hopper 2014 and the screw feeder 2015 cooperate with each other to achieve continuous feeding of the integrated furnace for vertical pyrolysis carbonization and oxygen-limited combustion.

[0046] Embodiment 2

[0047] This embodiment provides a vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace, the structure of which is basically the same as that of the vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace provided in the first embodiment, except that:

[0048] See also Figure 2 The vertical integrated furnace of pyrolysis carbonization and oxygen-limited combustion of this embodiment also includes a plurality of combustion chambers connected to the pyrolysis gas outlet. Exemplarily, the number of the combustion chambers is four, namely, the first combustion chamber 2016, the second combustion chamber 2017, the third combustion chamber 2018 and the fourth combustion chamber 2019.

[0049] In this way, the pyrolysis gas can pass through multiple combustion chambers in sequence, and air is supplied into the multiple combustion chambers at the same time, so as to realize high-temperature staged combustion of the pyrolysis gas, and realize full combustion and cleanness of the pyrolysis gas.

[0050] Considering that the supply of relatively cold air into the melting zone 205 may cause the melting zone 205 to be overcooled, or even blow out the flame in the oxygen-enriched combustion zone 204, the above-mentioned vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace also includes a heat exchanger provided on the connecting pipeline between the main fan 207 and the melting zone 205, the air outlet of the main fan 207 is connected to the melting zone 205 through the cold air pipeline of the heat exchanger, and the air outlet of the combustion chamber is connected to the hot air pipeline of the heat exchanger. In this way, through the setting of the heat exchanger, the high-temperature gas discharged from the combustion chamber is used to preheat the air supplied to the melting zone 205 by the main fan 207 in advance, thereby avoiding overcooling of the melting zone 205 and extinguishing of the flame in the oxygen-enriched combustion zone 204.

[0051] In order to further preheat the air supplied to the melting zone 205, the above-mentioned vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace also includes a blower 2022, the air outlet of the blower 2022 is connected to the air inlet of the discharge zone 206, and the air outlet of the discharge zone 206 is connected to the air inlet of the main fan 207. The air is preheated in advance using the temperature of the material in the discharge zone 206, and then further preheated when it is supplied to the melting zone 205 through the main fan 207.

[0052] Embodiment 3

[0053] This embodiment provides a vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace, the structure of which is basically the same as the vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace provided in Embodiment 1 or Embodiment 2, except that:

[0054] See also Figure 3 The vertical integrated furnace of pyrolysis carbonization and oxygen-limited combustion in this embodiment also includes a pressing and dehydration unit, a drying drum furnace 2020 and a granulation unit 2021 which are connected in sequence. The discharge port of the granulation unit 2021 is connected to the feed port of the fungus residue. The fungus residue slurry is dehydrated by the pressing and dehydration unit to obtain dehydrated fungus residue. The dehydrated fungus residue is dried by the drying drum furnace 2020, and the dried fungus residue is supported by the granulation unit 2021 to form fungus residue particles.

[0055] For example, for the pressing and dewatering unit, see Figure 4 It includes a vertical reciprocating drive 101, a filter chamber 102, an extrusion roller 103 and a filter wrapping layer 104. The filter wrapping layer 104 wraps the bacterial residue slurry to form a bacterial residue slurry bag. The bacterial residue slurry bag is placed in the filter chamber 102. The extrusion roller 103 is placed above the filter chamber 102. The vertical reciprocating drive 101 is arranged below the filter chamber 102.

[0056] During implementation, the vertical reciprocating driver 101 drives the filter chamber 102 to reciprocate relative to the squeezing roller 103, so that the squeezing roller 103 compresses, consolidates, and dehydrates the mushroom residue slurry in the mushroom residue slurry bag. In this way, the high-pressure mechanical pressure of the squeezing roller 103 is directly applied to the material particles, and the mechanical pressure can be diffused into the particles of the mushroom residue slurry, and the inside of the particles is effectively squeezed and dehydrated, thereby improving the dehydration rate of the mushroom residue and ensuring the dehydration effect.

[0057] In order to further promote the dehydration of the fungus residue slurry, the structure of the filter cavity 102 is illustratively a filter cavity 102 including an inner cavity 1021, an outer cavity 1022 and a heating coil 1023. The outer cavity 1022 is arranged outside the inner cavity 1021, and there is a gap between the inner cavity 1021 and the outer cavity 1022. The heating coil 1023 is located in the gap. A heating fluid such as steam or heat transfer oil is introduced into the heating coil 1023, and heat is transferred to the fungus residue slurry bag through the inner cavity 1021. In this way, the fungus residue slurry is heated by the heating coil 1023, and the increase in temperature will reduce the viscosity of the fungus residue slurry, which is more conducive to the dehydration of the fungus residue slurry.

[0058] In order to promote the escape of water from the mushroom residue slurry bag, the number of the above-mentioned heating coils 1023 is multiple, and the multiple heating coils 1023 are arranged in sequence vertically. From bottom to top, the temperature of the heating coils 1023 gradually increases. For example, the temperature of the top heating coil 1023 is above 100° C., and the temperature of the bottom heating coil 1023 is 50-70° C. In this way, since the heating temperature of the top heating coil 1023 is relatively high, the water in the mushroom residue on the upper part of the mushroom residue slurry bag can be turned into steam, so that the air pressure in the upper space of the mushroom residue slurry bag increases, and the air pressure is used to further promote the discharge of water from the mushroom residue slurry bag.

[0059] In order to effectively heat the upper surface of the mushroom residue slurry bag to generate steam, the structure of the extrusion roller 103, specifically, the extrusion roller 103 includes a roller body and a heating body arranged in the roller body. It should be noted that the temperature of the heating body is controlled above 100°C (for example, 100-120°C).

[0060] Specifically, the radial cross-section of the extrusion roller 103 is cam-shaped. During the compaction and dehydration process, the initial position of the extrusion roller 103 is that the outer wall with the smallest radius faces the mushroom residue slurry bag. In this way, the vertical reciprocating driver 101 is turned on to drive the mushroom residue slurry bag to move toward the extrusion roller 103 and contact the extrusion roller 103, and the mushroom residue slurry bag is continued to be driven toward the extrusion roller 103. The extrusion roller 103 performs a compaction and dehydration on the mushroom residue slurry in the mushroom residue slurry bag. When the mushroom residue slurry bag reaches the preset position, the vertical reciprocating driver 101 is turned off, the mushroom residue slurry bag stops moving, and the extrusion roller 103 is turned on. The extrusion roller 103 rotates so that the outer diameter of the extrusion roller 103 corresponding to the mushroom residue slurry bag increases, and the mushroom residue is continuously depressurized for secondary compaction and dehydration. It should be noted that during the rotation of the extrusion roller 103, the outer diameter of the extrusion roller 103 corresponding to the fungus residue slurry bag is constantly changing. Correspondingly, the mechanical pressure on the fungus residue slurry in the fungus residue slurry bag is also constantly changing. When the mechanical pressure decreases, gaps will appear between the fungus residue particles in the fungus residue slurry bag, causing the positions of the fungus residue particles to change. When the mechanical pressure increases, the fungus residue slurry in the fungus residue slurry bag will be further compacted and dehydrated, thereby effectively improving the uniformity and dehydration rate of dehydration. In addition, during the rotation of the extrusion roller 103, when the mechanical pressure decreases, the space above the fungus residue slurry bag increases, and the increased space can accommodate more steam. When the mechanical pressure increases, the steam will be forced to flow downward, and the air pressure will be used to further promote the discharge of water in the fungus residue slurry bag.

[0061] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace, characterized in that: Including furnace body and main fan; The inner cavity of the furnace body is divided into a drying zone, an oxygen-limited thermal decomposition zone, a carbonization zone, an oxygen-enriched combustion zone, a melting zone and a discharge zone from top to bottom. A fungus slag feed inlet is provided on the side wall of the drying zone, a pyrolysis gas outlet is provided in the oxygen-limited thermal decomposition zone, and the main fan is connected to the melting zone. The main fan supplies air or oxygen to the oxygen-enriched combustion zone through the melting zone.

2. The vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace according to claim 1 is characterized in that: The pyrolysis gas outlet of the oxygen-limited pyrolysis zone is connected to an induced draft fan.

3. The vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace according to claim 2 is characterized in that: The oxygen-limited thermal decomposition zone is provided with a thermal decomposition zone air inlet, and the thermal decomposition zone air inlet is connected to the auxiliary fan.

4. The vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace according to claim 1 is characterized in that: A first grate is provided between the oxygen thermal decomposition zone and the carbonization zone.

5. The vertical integrated furnace for pyrolysis carbonization and oxygen-limited combustion according to claim 4, characterized in that: A second grate is arranged between the melting zone and the discharge zone.

6. The vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace according to claim 4, characterized in that: The integrated furnace further comprises a distribution plate arranged below the first grate, and distribution holes are provided on the distribution plate.

7. The vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace according to claim 6, characterized in that: The shape of the distribution plate is conical.

8. The vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace according to claim 1, characterized in that: The integrated furnace also includes a feed hopper and a screw feeder, and the feed hopper is connected to the fungus residue feed port through the screw feeder.

9. The vertical integrated furnace for pyrolysis carbonization and oxygen-limited combustion according to any one of claims 1 to 8, characterized in that: The integrated furnace also includes a plurality of combustion chambers connected to the pyrolysis gas outlet.

10. The vertical pyrolysis carbonization and oxygen-limited combustion integrated furnace according to claim 9, characterized in that: The integrated furnace also includes a heat exchanger arranged on the connecting pipeline between the main fan and the melting zone, the air outlet of the main fan is connected to the melting zone through the cold air pipeline of the heating pipeline, and the air outlet of the combustion chamber is connected to the hot air inlet of the heat exchanger.

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