Environment-friendly carbonization volatilization furnace

Abstract

The environment-friendly carbonization volatilization furnace comprises a furnace body, a furnace door, a waste gas treatment device and an exhaust device, the waste gas treatment device comprises an outer shell, an upper treatment box body and a lower treatment box body, a waste gas inlet is formed in the lower portion of one end of the lower treatment box body, and a baffle and a splitter plate are further arranged in the lower treatment box body at intervals; an air inlet hole is formed in the other end of the lower treatment box body, gas mixing holes are further formed in the side, close to the air inlet hole, in the lower treatment box body, and the interior of the lower treatment box body is communicated with the air inlet hole through the multiple gas mixing holes; a catalytic reaction box is arranged in the upper treatment box body, one end of the catalytic reaction box is provided with a reaction box gas inlet channel, and the reaction box gas inlet channel is communicated with the gas mixing hole; the volatilization furnace is compact in overall structure and short in gas flow path, resistance loss is reduced, meanwhile, the lower-layer treatment box body and the upper-layer treatment box body are arranged in the waste gas treatment device, gas is subjected to mixed cooling and catalytic action, and efficient catalytic decomposition of the gas is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial heat treatment equipment, in particular to an environmental protection carbonization volatile furnace for treating volatile organic compound-containing waste gas, which is especially suitable for efficient and low-emission heat treatment process in chemical, coating, electronic and other industries. BACKGROUND

[0002] The volatile furnace is a kind of high-temperature box furnace, which is usually used for high-temperature sintering, metal annealing and quality detection in colleges and universities, scientific research institutes and industrial and mining enterprises, and is used for baking, zirconia disc pre-sintering and the like in powder metallurgy industry and false tooth processing industry. The traditional volatile furnace has the following technical bottlenecks in the high-temperature treatment process:

[0003] 1. Poor system integration: the waste gas treatment unit and the furnace body are usually designed separately, which occupies a large space and has significant pipeline heat loss; and the existing integrated equipment is difficult to simultaneously realize physical mixing and deep catalysis due to the lack of a grading treatment mechanism.

[0004] 2. Low waste gas treatment efficiency: the conventional single-stage treatment device (such as direct catalytic combustion or adsorption tower) has insufficient purification rate for complex component waste gas, and especially for high-concentration waste gas which is not fully premixed, local reaction dead angles are easy to occur, resulting in escape of harmful substances (such as benzene series and aldehydes).

[0005] 3. High energy consumption and operation cost: in order to meet the catalytic reaction temperature, a large amount of energy is consumed to preheat the waste gas; at the same time, the static mixing structure (such as a single baffle) leads to uneven gas flow distribution, and the fan power needs to be increased to maintain the pressure drop, further increasing the energy consumption. SUMMARY

[0006] In order to solve the above technical problems, the purpose of the present application is to provide an environmental protection carbonization volatile furnace, which has waste gas treatment function and is high in efficiency.

[0007] In order to achieve the above-mentioned application purpose, the present application adopts the following technical scheme:

[0008] The environmental protection carbonization and volatilization furnace comprises a furnace body, a furnace door, a waste gas treatment device and an exhaust device, the furnace door is hinged to the furnace body, a locking mechanism is further arranged between the furnace door and the furnace body, the waste gas treatment device is arranged on the top of the furnace body, the waste gas treatment device comprises an outer shell and upper and lower double-layer treatment box bodies arranged in the outer shell, a waste gas inlet is arranged at the lower end of the lower treatment box body, the waste gas inlet is communicated with a waste gas outlet on the top of the furnace body, baffles and flow dividing plates are further arranged in the lower treatment box body, an air inlet hole is arranged at the other end of the lower treatment box body, the air inlet hole is communicated with the outside through an air inlet pipe, gas mixing holes are further arranged on the side of the lower treatment box body close to the air inlet hole, and the gas mixing holes are communicated with the air inlet hole; a catalytic reaction box is arranged in the upper treatment box body, a plurality of catalytic reaction plates are arranged in the catalytic reaction box, a reaction box gas inlet channel is arranged at one end of the catalytic reaction box, and the reaction box gas inlet channel is communicated with the gas mixing holes; and the exhaust device is arranged above the waste gas treatment device and is communicated with the other end of the catalytic reaction box.

[0009] As a preferred solution, heat preservation plates A are arranged on the inner bottom and sidewall of the lower treatment box body, a plurality of gas mixing holes are arranged on the heat preservation plate A at one end of the lower treatment box body, an upper end plate is further arranged between the heat preservation plates A around the lower treatment box body, and a through hole matched with the reaction box gas inlet channel is arranged on one side of the upper end plate.

[0010] As a preferred solution, the baffles and the flow dividing plates are fixed on the heat preservation plate A at the bottom, the baffles are close to the waste gas inlet, and the length of the baffles is greater than that of the flow dividing plates.

[0011] As a preferred solution, the flow dividing plates are close to one end of the air inlet hole, the flow dividing plates are two, and the two flow dividing plates are arranged along the width direction.

[0012] As a preferred solution, the furnace body comprises an outer frame, metal side plates, inner heat preservation plates and a heating cavity, the heating cavity is fixed in the outer frame, the heating cavity is surrounded by heat preservation plates B and has an open front end, heating pipes are arranged in the heat preservation plates B, an air outlet hole is further arranged on the rear wall of the heating cavity and is communicated with the waste gas outlet on the top of the furnace body, the metal side plates are fixed on the outer frame, the metal side plate at the front end of the heating cavity is further provided with an opening matched with the heating cavity, and the inner heat preservation plates are arranged between the metal side plates and the heating cavity.

[0013] As a preferred scheme, the top of the furnace body is further provided with a waste gas rotating channel, the top of the waste gas rotating channel is further fixed with a top heating plate, the waste gas outlet is arranged on the top heating plate, the waste gas rotating channel is three channels arranged side by side, one end of the middle channel is communicated with the waste gas outlet, the other end of the middle channel is communicated with the two side channels respectively, the rear side of the heating cavity is further provided with a rear back plate, a longitudinal connecting channel is arranged on the rear back plate, one end of the two side channels is communicated with the gas outlet through the longitudinal connecting channel; a T-shaped transverse connecting channel is further arranged between the two longitudinal connecting channels, and the lower end of the transverse connecting channel is provided with a gas hole communicated with the outside.

[0014] As a preferred scheme, the locking mechanism comprises a clamping column fixed on the furnace body and a door lock fixed on the furnace door, the door lock comprises a door lock wrench, a door lock clamping hook and a door lock mounting plate, the door lock mounting plate is fixed on the side surface of the furnace door, the door lock wrench is hinged on the door lock mounting plate, the door lock clamping hook is hinged with the door lock wrench, and the door lock clamping hook is buckled with the clamping column, so that the door lock clamping hook and the door lock wrench are vertically arranged.

[0015] As a preferred scheme, a guide groove is further arranged on the door lock mounting plate, and a guide column is arranged on the door lock clamping hook and embedded in the guide groove.

[0016] As a preferred scheme, the furnace door comprises a door body metal plate frame and a door body heat preservation plate arranged in the door body metal plate frame, and the shape of the door body heat preservation plate matches the opening shape of the heating cavity.

[0017] As a preferred scheme, the outer shell comprises a bottom plate and an outer metal shell fixed with each other, and the top of the bottom plate and the outer metal shell is provided with a gas through hole.

[0018] The volatile furnace directly fixes the waste gas treatment device and the exhaust device on the top of the furnace body, has compact overall structure, short gas flow path and reduced resistance loss, and the lower treatment box and the upper treatment box are arranged in the waste gas treatment device, so that the gas is mixed and cooled and catalyzed, and efficient catalytic decomposition of the gas is realized. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings accompanying the specification of the present application are used to provide further understanding of the present application, the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute limitation to the present application.

[0020] Figure 1 and Figure 2 are overall structure schematic diagrams of two different angles of the present application;

[0021] Figure 3 is a top structure schematic diagram of the furnace body of the present application;

[0022] Figure 4 is a front view of the furnace body of the present application (furnace door not shown);

[0023] Figure 5 is a partial exploded view of the furnace body of the present application;

[0024] Figure 6 is a partial exploded view of the heating chamber and inner insulation plate and other components of the present application;

[0025] Figure 7 and Figure 8 are two different angle exploded views of the exhaust device and exhaust treatment device of the present application;

[0026] Figure 9 is a structural view of the furnace door of the present application;

[0027] Figure 10 and Figure 11 is a structural view of the door lock of the present application.

[0028] The reference signs are: 1, furnace body; 11, metal side plate; 12, inner insulation plate; 13, insulation plate B; 14, air outlet hole; 15, longitudinal connecting channel; 16, exhaust gas rotating channel; 17, top heating plate; 171, exhaust gas outlet; 18, back plate; 181, transverse connecting channel; 182, air hole; 2, furnace door; 21, door body metal plate frame; 22, door body insulation plate; 23, door lock wrench; 231, hinged column A; 232, hinged hole A; 24, door lock clasp; 241, guide column; 242, hinged column B; 25, door lock mounting plate; 251, guide groove; 252, hinged hole B; 26, first connecting plate; 27, second connecting plate; 261, waist-shaped hole; 3, exhaust treatment device; 31, bottom plate; 32, lower box body; 321, air inlet hole; 33, exhaust gas inlet; 34, baffle; 35, shunt plate; 36, gas mixing hole; 37, air inlet pipe; 38, upper end plate; 39, upper box body; 391, reaction box air inlet channel; 310, catalytic reaction box; 311, catalytic reaction plate; 312, outer metal shell; 4, exhaust device; 6, controller assembly; 7, bottom electrical component assembly; 71, flow meter; 72, air pipe. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0030] It is to be understood that the terms so used are merely descriptive rather than limiting. As used herein, singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components, and / or groups thereof.

[0031] In addition, in the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0032] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more, unless otherwise explicitly limited.

[0033] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Below", "below" and "below" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0035] The application will be further described below in connection with the accompanying drawings and embodiments:

[0036] As Figures 1 to 8 shown, the environmental protection carbonization and volatilization furnace comprises a furnace body 1, a furnace door 2, a waste gas treatment device 3 and an exhaust device 4. The furnace door 2 is hinged to the furnace body 1, and a locking mechanism is further arranged between the furnace door 2 and the furnace body 1. The waste gas treatment device 3 is arranged at the top of the furnace body 1. The waste gas treatment device 3 comprises an outer shell and upper and lower double-layer treatment box bodies arranged in the outer shell. A waste gas inlet 33 is arranged at the lower end of the lower treatment box body 32. The waste gas inlet 33 is in communication with a waste gas outlet 171 at the top of the furnace body 1. A baffle 34 and a flow divider 35 are further arranged in the lower treatment box body 32. An air inlet hole 321 is arranged at the other end of the lower treatment box body 32. The air inlet hole 321 is in communication with the outside through an air inlet pipe 37. An automatic adjusting valve for adjusting the amount of external air entering is further arranged on the air inlet pipe 37. A gas mixing hole 36 is further arranged on the side of the lower treatment box body 32 close to the air inlet hole 321. A plurality of gas mixing holes 36 are in communication with the inside of the lower treatment box body 32 and the air inlet hole 321. A catalytic reaction box 310 is arranged in the upper treatment box body 39. A plurality of catalytic reaction plates 311 are arranged in the catalytic reaction box 310. A reaction box gas inlet passage 391 is arranged at one end of the catalytic reaction box 310. The reaction box gas inlet passage 391 is in communication with the gas mixing hole 36. The exhaust device 4 is arranged above the waste gas treatment device 3 and is in communication with the other end of the catalytic reaction box 310.

[0037] The above structure realizes overall integration and efficient treatment. The waste gas treatment device is directly integrated at the top of the furnace body, which reduces the equipment floor area and realizes “source treatment” of the waste gas, avoids leakage or secondary pollution of the waste gas in the transmission process, and improves environmental protection.

[0038] The double-layer treatment box body design (lower pre-treatment and upper catalytic reaction) in the above structure realizes efficient step-by-step treatment of the waste gas. The lower treatment box body increases the turbulence of the airflow through the baffle and the flow divider, prolongs the residence time of the waste gas, and promotes the preliminary mixing of the air and the waste gas. The upper catalytic reaction box utilizes the catalytic reaction plates to catalytically oxidize the mixed gas (such as decomposing VOCs), which significantly reduces the emission of harmful substances. The air inlet hole and the gas mixing hole allow the quantitative introduction of external air, which is fully mixed with the waste gas, reduces the temperature of the waste gas, and meets the requirements of the subsequent catalytic reaction.

[0039] In addition, the exhaust device in the above structure is arranged above the waste gas treatment device, which ensures smooth discharge of the treated gas, prevents airflow blockage or backflow, and maintains system pressure balance. Moreover, the environmental protection and safety performance of the entire device are improved: through catalytic reaction, the waste gas is converted into harmless substances (such as CO2 and H2O), reducing the odor of the exhaust gas and reducing air pollution; at the same time, the furnace door locking mechanism prevents heat or waste gas leakage during operation, improving safety.

[0040] The inner bottom and inner side of the side wall of the lower treatment box 32 are provided with heat preservation plates A, and a plurality of gas mixing holes 36 are formed in the heat preservation plate A at one end of the lower treatment box 32. An upper end plate 38 is further arranged between the heat preservation plates A around, and a through hole matched with the reaction box gas inlet channel 391 is arranged on one side of the upper end plate 38. The heat preservation plate A reduces heat loss and keeps the internal temperature of the lower treatment box stable (especially suitable for mixed reactions that require a certain temperature), avoids the reduction of treatment efficiency caused by waste gas cooling (such as condensation or incomplete reaction), and thus improves energy efficiency. The gas mixing holes are directly formed in the heat preservation plate A, which ensures the accuracy and durability of the hole position and prevents deformation or leakage; the upper end plate provides sealing for the top of the box and is seamlessly connected with the upper treatment box through the through hole, which ensures the continuity of the gas flow path and reduces gas diffusion. The heat preservation environment is conducive to heat exchange between air and waste gas, promotes mixing uniformity, and creates better conditions for subsequent catalytic reaction.

[0041] The baffle 34 and the flow divider 35 are both fixed on the heat preservation plate A at the bottom, the baffle 34 is close to the waste gas inlet 33, and the length of the baffle 34 is greater than that of the flow divider 35. The baffle is close to the waste gas inlet and has a large length, which can effectively block and disperse the high-speed entering waste gas, slow down the airflow speed, increase the turbulence and residence time, make the waste gas distribution more uniform, and avoid the "short circuit" phenomenon (part of the waste gas is directly discharged without treatment). The baffle and the flow divider are fixed on the heat preservation plate A, which enhances the mechanical strength and prevents the parts from vibrating or shifting due to airflow impact, thereby improving the system reliability. The flow divider assists in guiding the airflow and cooperates with the baffle to form multi-stage buffering, further improving the mixing efficiency of air and waste gas.

[0042] The flow divider 35 is close to one end of the air inlet hole 321, and the flow divider 35 is two pieces, which are arranged in a width direction. The two flow dividers create multiple parallel airflow channels, making the air more evenly distributed after entering from the air inlet hole, avoiding local uneven mixing, ensuring sufficient contact between oxygen and waste gas, and improving the pretreatment effect. The flow divider is close to the air inlet hole, which directly optimizes the air introduction path, reduces the flow resistance, and reduces the energy consumption.

[0043] The furnace body 1 includes an outer frame, a metal side panel 11, an inner insulation panel 12 and a heating chamber. The heating chamber is fixed in the outer frame. The heating chamber is enclosed by an insulation panel B13 and is open at the front end. A heating pipe is buried in the insulation panel B13. An air outlet 14 is also provided on the rear wall of the heating chamber. The air outlet 14 is connected to the exhaust gas outlet 171 at the top of the furnace body 1. The metal side panel 11 is fixed on the outer frame, and the metal side panel 11 at the front end of the heating chamber is also provided with an opening matching the heating chamber. The inner insulation panel 12 is arranged between the metal side panel and the heating chamber.

[0044] The dual insulation design of the inner insulation plate and insulation plate B significantly reduces heat loss from the furnace, maintaining a high temperature environment (ideal for the volatilization process), improving heating efficiency, and reducing energy consumption. Heating tubes embedded in insulation plate B provide a stable heat source, ensuring a uniform temperature in the heating chamber, promoting complete volatilization of the material, and reducing residue. The exhaust port is directly connected to the exhaust outlet, allowing exhaust gases to be quickly directed to the treatment device, preventing accumulation within the furnace and reducing the risk of explosion.

[0045] The top of the furnace body 1 is also provided with an exhaust gas recirculation channel 16, to which a top heating plate 17 is fixed. The exhaust gas outlet 171 is provided on the top heating plate 17. The exhaust gas recirculation channel 16 consists of three channels arranged side by side, with one end of the central channel connected to the exhaust gas outlet 171, and the other end of the central channel connected to the channels on both sides. The rear side of the heating chamber is also provided with a back plate 18, on which a longitudinal connecting channel 15 is provided. One end of the channels on both sides is connected to the air outlet 14 through the longitudinal connecting channel 15. A T-shaped transverse connecting channel 181 is also provided between the two longitudinal connecting channels 15, and a vent 182 is provided at the lower end of the transverse connecting channel 181 for communication with the outside.

[0046] The three-channel design (connected in the center and on both sides) increases the exhaust gas flow path, prolonging its residence time within the furnace, allowing for further pyrolysis of incompletely volatilized substances and reducing direct pollutant emissions. The top heating plate further heats the exhaust gas, accelerating pyrolysis. The longitudinal connecting channel not only connects the exhaust gas circulatory channel with the interior of the furnace, but also introduces external air into the circulatory channel, accelerating the complete combustion and decomposition of the exhaust gas.

[0047] like Figures 9 to 11 As shown, the furnace door 2 comprises a metal frame 21 and a door insulation board 22 mounted within the frame. The board's shape matches the opening of the heating chamber. The board is connected to the frame in a floating manner and features a sealing ring on the side of the board that contacts the furnace. This reduces heat loss from the furnace door and ensures a tight fit with the opening of the heating chamber, preventing heat leakage and exhaust gas escape.

[0048] The locking mechanism comprises a clamping column fixed on the furnace body 1 and a door lock fixed on the furnace door 2, the door lock comprises a door lock wrench 23, a door lock clamping hook 24 and a door lock mounting plate 25, the door lock mounting plate 25 is fixed on the side of the furnace door 2, the door lock wrench 23 is hinged on the door lock mounting plate 25, the door lock clamping hook 24 is hinged with the door lock wrench 23, and the door lock clamping hook 24 is buckled with the clamping column, so that the door lock clamping hook 24 is vertically arranged with the door lock wrench 23.

[0049] The vertical buckling design provides high mechanical locking force, ensures that the furnace door is tightly closed with the furnace body, prevents high-temperature waste gas or heat leakage, and improves the operation safety; and the hinged door lock wrench simplifies the door opening and closing process and reduces the labor demand; the vertically arranged clamping hook provides a lever effect, which is easy to lock and unlock, in addition, the metal parts (clamping column and clamping hook) are resistant to high temperature and corrosion, and are suitable for volatile furnace environment.

[0050] One end of the door lock clamping hook 24 is provided with a hinge column B242, the door lock wrench 23 is provided with a hinge hole A232, the hinge column B242 is arranged in the hinge hole A232, one side of the door lock wrench 23 located in the hinge hole A232 is provided with a hinge column A231, and the door lock mounting plate 25 is provided with a hinge hole B252, and the hinge column A231 is arranged in the hinge hole B252.

[0051] The door lock mounting plate 25 is also provided with a guide groove 251, the door lock clamping hook 24 is provided with a guide column 241, and the guide column 241 is embedded in the guide groove 251. The guide groove and the guide column guide the linear movement of the clamping hook, prevent the clamping hook from being stuck or deviated, ensure the smooth and reliable locking process, reduce the friction between the parts through mechanical guidance, prolong the service life of the locking mechanism, and in addition, in the high-temperature vibration environment, the guide design maintains the locking stability and avoids accidental loosening.

[0052] The furnace door and the furnace body are connected through a hinge, the hinge comprises a first connecting piece 26 and a second connecting piece 27, the first connecting piece 26 is provided with a waist-shaped hole 261, and the shaft of the second connecting piece 27 is arranged in the waist-shaped hole 261. The arrangement of the waist-shaped hole enables the hinge side of the furnace door to have a certain displacement, and cooperates with the above-mentioned locking mechanism, so that the sealing performance of the furnace door and the furnace body is better.

[0053] The outer shell comprises a bottom plate 31 and an outer metal shell 312 fixed with each other, and the bottom plate 31 and the top of the outer metal shell 312 are both provided with gas through holes.

[0054] One side of the furnace body 1 is also provided with a controller assembly 6, and the bottom of the furnace body 1 is also provided with a bottom electrical appliance assembly 7. One side of the bottom electrical appliance assembly 7 is also provided with a flowmeter 71, the inlet and outlet ends of the flowmeter 71 are respectively connected with air pipes 72, and one of the air pipes is communicated with the inside of the furnace body.

[0055] The application develops a highly integrated, hierarchical and collaborative processing volatile furnace structure, which realizes the following in a limited space: low pressure loss and efficient mixing of waste gas and air, reducing the waste gas temperature; and realizes the coupling of physical pretreatment and deep catalytic reaction under gradient temperature control; and makes heat recycling to reduce the total energy consumption of the system.

[0056] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0057] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those of ordinary skill in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application without departing from the principles and spirit of the present application. Any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments are still within the scope of the technical scheme of the present application.

Claims

1. Environmentally friendly carbonization volatilization furnace, characterized by: It comprises a furnace body (1), a furnace door (2), an exhaust gas treatment device (3) and an exhaust device (4), The furnace door (2) is hinged on the furnace body (1), and a locking mechanism is provided between the furnace door (2) and the furnace body (1). The exhaust gas treatment device (3) is provided on the top of the furnace body (1). The exhaust gas treatment device (3) comprises an outer shell and upper and lower double-layer treatment boxes provided in the outer shell. An exhaust gas inlet (33) is provided at the lower portion of one end of the lower processing box (32), and the exhaust gas inlet (33) is communicated with the exhaust gas outlet (171) at the top of the furnace body (1). A baffle (34) and a diverter plate (35) are also provided at intervals in the lower processing box (32). An air inlet hole (321) is provided at the other end of the lower processing box (32), and the air inlet hole (321) is communicated with the outside through an air inlet pipe (37). A gas mixing hole (36) is also provided on one side of the lower processing box (32) near the air inlet hole (321), and a plurality of gas mixing holes (36) connect the interior of the lower processing box (32) with the air inlet hole (321). A catalytic reaction box (310) is provided in the upper processing box (39), and multiple rows of catalytic reaction plates (311) are arranged at intervals in the catalytic reaction box (310). A reaction box air inlet channel (391) is provided at one end of the catalytic reaction box (310), and the reaction box air inlet channel (391) is communicated with the gas mixing hole (36); The exhaust device (4) is arranged above the exhaust gas treatment device (3), and the exhaust device (4) is connected to the other end of the catalytic reaction box (310).

2. The environmentally friendly carbonization volatilization furnace according to claim 1, characterized in that: The bottom and inner side of the side wall of the lower processing box (32) are both provided with an insulation plate A, and a plurality of gas mixing holes (36) are opened on the insulation plate A at one end of the lower processing box (32), and an upper end plate (38) is also provided between the surrounding insulation plates A, and a through hole matching the reaction box air inlet channel (391) is provided on one side of the upper end plate (38).

3. The environmentally friendly carbonization volatilization furnace according to claim 2, characterized in that: The baffle (34) and the diverter plate (35) are both fixed on the bottom insulation plate A. The baffle (34) is close to the exhaust gas inlet (33), and the length of the baffle (34) is greater than the length of the diverter plate (35).

4. The environmentally friendly carbonization volatilization furnace according to claim 1 or 3, characterized in that: The diverter plate (35) is located at one end close to the air inlet hole (321). The diverter plates (35) are in two pieces, and the two diverter plates (35) are spaced apart along the width direction.

5. The environmentally friendly carbonization volatilization furnace according to claim 1, characterized in that: The furnace body (1) comprises an outer frame, a metal side plate (11), an inner insulation plate (12) and a heating chamber, wherein the heating chamber is fixed in the outer frame, the heating chamber is enclosed by an insulation plate B (13) and has an opening at the front end, a heating pipe is embedded in the insulation plate B (13), an air outlet (14) is also provided on the rear wall of the heating chamber, and the air outlet (14) is connected to the exhaust gas outlet (171) at the top of the furnace body (1), the metal side plate (11) is fixed on the outer frame, and the metal side plate (11) located at the front end of the heating chamber is also provided with an opening matching the heating chamber, and the inner insulation plate (12) is arranged between the metal side plate and the heating chamber.

6. The environmentally friendly carbonization volatilization furnace according to claim 5, characterized in that: The top of the furnace body (1) is also provided with an exhaust gas recirculation channel (16), and a top heating plate (17) is also fixed on the top of the exhaust gas recirculation channel (16). The exhaust gas outlet (171) is provided on the top heating plate (17). The exhaust gas recirculation channel (16) is composed of three channels arranged side by side, one end of the middle channel is connected to the exhaust gas outlet (171), and the other end of the middle channel is connected to the channels on both sides respectively. A back plate (18) is also provided on the rear side of the heating chamber, and a longitudinal connecting channel (15) is provided on the back plate (18). One end of the channels on both sides is connected to the air outlet (14) through the longitudinal connecting channel (15); a T-shaped transverse connecting channel (181) is also provided between the two longitudinal connecting channels (15), and a vent (182) connected to the outside is provided at the lower end of the transverse connecting channel (181).

7. The environmentally friendly carbonization volatilization furnace according to claim 1, characterized in that: The locking mechanism comprises a clamping column fixed to the furnace body (1) and a door lock fixed to the furnace door (2); the door lock comprises a door lock wrench (23), a door lock hook (24) and a door lock mounting plate (25); the door lock mounting plate (25) is fixed to the side of the furnace door (2); the door lock wrench (23) is hinged on the door lock mounting plate (25); the door lock hook (24) is hinged to the door lock wrench (23); the door lock hook (24) is fastened to the clamping column, so that the door lock hook (24) and the door lock wrench (23) are arranged vertically.

8. The environmentally friendly carbonization volatilization furnace according to claim 7, characterized in that: A guide groove (251) is further provided on the door lock mounting plate (25), and a guide column (241) is provided on the door lock hook (24), and the guide column (241) is embedded in the guide groove (251).

9. The environmentally friendly carbonization volatilization furnace according to claim 1, characterized in that: The furnace door (2) comprises a door metal plate frame (21) and a door heat insulation board (22) arranged in the door metal plate frame, wherein the shape of the door heat insulation board (22) matches the opening shape of the heating chamber.

10. The environmentally friendly carbonization volatilization furnace according to claim 1, characterized in that: The outer shell comprises a bottom plate (31) and an outer metal shell (312) fixed to each other, and gas through holes are provided on the tops of the bottom plate (31) and the outer metal shell (312).

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