CN212537850U - Plasma gasification melting furnace - Google Patents

Abstract

The utility model discloses a plasma gasification melting furnace, which comprises a furnace body for burning and decomposing solid wastes, wherein the furnace body is provided with an air pipe, a material distribution device and a plasma generator; the furnace body is provided with a hollow inner cavity, the furnace body comprises a furnace upper part and a furnace lower part, the furnace upper part is detachably arranged on the furnace lower part and forms the hollow inner cavity, the hollow inner cavity sequentially comprises a conversion section, a drying pyrolysis reduction section, an oxidation section, a slag section and a solution section from top to bottom, the conversion section, the drying pyrolysis reduction section, the oxidation section and the slag section are positioned on the furnace upper part, the solution section is positioned on the furnace lower part, and a first included angle is formed between a wall body of the conversion section and a wall body of the drying pyrolysis reduction section so as to reduce the resistance of material descending; a second included angle is formed between the wall body of the oxidation section and the wall body of the slag section, so that the materials are fully combusted at the slag section. The utility model discloses a plasma gasification melting furnace can reduce phenomenons such as the interior slag wall built-up of oven, nodulation, can promote again to burn and convenient the maintenance.

Description

Plasma gasification melting furnace

Technical Field

The utility model relates to a waste treatment technical field especially relates to a plasma gasification melting furnace.

Background

At present, the common treatment technologies for solid wastes mainly include solidification landfill, incineration, high-temperature melting, and the like. The solidification landfill method is the simplest and most common method, but has significant environmental risks and land resource occupation problems, and is gradually replaced by other methods. Although the incineration method is a mainstream treatment method in the field of hazardous waste treatment, the method can play a role in reducing to a certain extent, the treated residues such as fly ash and the like are still hazardous waste, and the solidification and landfill treatment is still needed in the later period, so that the problems of environmental pollution and land resource occupation cannot be fundamentally solved. The plasma high-temperature melting technology is the most effective and internationally recognized method which is suitable for treating most dangerous wastes at present, and can achieve the effects of light emission and less landfill. However, the conventional plasma gasification furnace is easy to generate phenomena such as slag wall hanging and nodulation in the burning process, has incomplete burning, and is difficult to clean and overhaul.

Therefore, there is a need for a plasma gasification melting furnace that can facilitate incineration and facilitate maintenance while reducing the occurrence of slag accretions and the like in the furnace wall.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can reduce phenomenons such as the interior slag wall built-up of oven, nodulation, can promote again to burn and the convenient plasma gasification melting furnace who overhauls.

In order to achieve the purpose, the utility model provides a plasma gasification melting furnace, which comprises a furnace body for burning and decomposing solid waste, wherein the furnace body is provided with an air pipe for blowing air, a material distribution device for feeding material and a plasma generator for generating plasma; the furnace body is provided with a hollow inner cavity, the furnace body comprises a furnace upper part and a furnace lower part, the furnace upper part is detachably arranged on the furnace lower part and forms the hollow inner cavity, the hollow inner cavity sequentially comprises a conversion section, a drying pyrolysis reduction section, an oxidation section, a slag section and a solution section from top to bottom, the conversion section, the drying pyrolysis reduction section, the oxidation section and the slag section are positioned on the furnace upper part, the solution section is positioned on the furnace lower part, and a first included angle is formed between a wall body of the conversion section and a wall body of the drying pyrolysis reduction section so as to reduce the resistance of material descending; a second included angle is formed between the wall body of the oxidation section and the wall body of the slag section, so that the materials are fully combusted at the slag section.

Compared with the prior art, the utility model discloses a plasma gasification melting furnace divide into stove upper portion and stove lower part, and stove upper portion and stove lower part are detachable and install together to convenient dismantlement is overhauld. Furnace upper portion includes conversion section, dry pyrolysis reduction section, oxidation section and sediment section, forms first contained angle between the wall body of conversion section and the wall body of dry pyrolysis reduction section, is provided with first contained angle and can reduces the frictional resistance that dangerous discarded object descends, avoids forming the material and encircles, can reduce phenomenons such as slag wall built-up, nodulation in the oven. Form the second contained angle between the wall body of oxidation section and the wall body of sediment section, set up the second contained angle and can play certain cushioning effect, make the material stop and fully burn in sediment section department, the material becomes the lime-ash after the oxidation section reaction, falls into the sediment section, because the volume diminishes after the burning, sets up the second contained angle and can present the fore shaft in the sediment section for the lime-ash can stop longer time in order to fully burn in the sediment section, can avoid material central point to burn incomplete phenomenon. The utility model discloses a plasma gasification melting furnace can reduce phenomenons such as the interior slag wall built-up of oven, nodulation, can promote again to burn and overhaul the convenience.

Preferably, the lower furnace portion includes a bottom wall inclined at a predetermined angle. The bottom wall is inclined to drain the metal in the solution section.

Preferably, the solution section is provided with a metal outlet for discharging metal at a side close to the lower end of the bottom wall. The metal outlet is arranged at the lower end of the bottom wall, so that metal substances decomposed after combustion can be discharged more conveniently.

Preferably, the solution section is further provided with a solution channel, the solution channel comprises a flow cavity, a rising channel, a main channel and a solution outlet which are communicated with each other, and the solution outlet is provided with a plasma generator. The solution passes through the throat, the ascending channel and the main channel and then flows out from the solution outlet, and a plasma generator is arranged at the solution outlet so as to heat the solution in the channel and prevent the molten solution outlet from being blocked.

Preferably, the hollow inner cavity is also provided with electrodes, and the electrodes are respectively arranged at the solution section and the solution channel. Electrodes are arranged in the solution section and the solution channel to melt the ash, and a molten pool is formed in the solution section after the ash is melted.

Preferably, the air pipe is arranged at the upper part of the furnace and is communicated with the slag section. For avoiding the central part of material to burn incompletely, arrange the tuber pipe in the sediment section region, because sediment section and stove sub-unit connection, there may be the diameter of gap and sediment section lower part here and be slightly less, set up the tuber pipe in the sediment section, the air is easier blows to the interior central point of stove and puts, and the even sediment section that sees through of air is to the oxidation section, causes the even burning of oxidation section, and the burning needs oxygen, and the oxidation section has produced from inhaling the principle, makes the easier equipartition of air.

Preferably, the oxidation section comprises a water cooling jacket and a support rib plate, the support rib plate is arranged at the outer side of the water cooling jacket, and the plasma generators are respectively arranged in the circumferential direction around the water cooling jacket. The water cooling sleeve can effectively prevent slag blocks from being hung on the wall, and the plasma generator can accelerate the reaction of the oxidation section.

Preferably, the furnace body is further provided with a fixing frame for fixing the upper part of the furnace and a bottom support frame for fixedly supporting the lower part of the furnace, the upper part of the furnace is fixedly connected with the fixing frame, the bottom support frame extends into the fixing frame, and the lower part of the furnace is arranged at the bottom support frame. The whole furnace body can be fixedly supported by arranging the fixed frame and the bottom support frame, so that the structure of the furnace body is more stable.

Preferably, the bottom support frame comprises a track horizontally arranged and extending into the fixed frame and a lifting driver arranged on the track in a sliding manner, and the lower part of the furnace body is arranged at the output end of the lifting driver. The furnace lower part is close to or far away from the furnace upper part by arranging a lifting driver.

Preferably, the dry pyrolysis reduction section, the oxidation section, the slag section and the solution section are all provided with temperature sensors. The temperature sensor is arranged to monitor and feed back the temperature of each reaction section.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic view of an internal structure of a plasma gasification melting furnace according to an embodiment of the present invention.

FIG. 2 is a schematic view of the internal structure of the plasma gasification melting furnace shown in FIG. 1 defining the furnace body sections.

Description of reference numerals:

100. a plasma gasification melting furnace; 101. a housing; 102. a refractory layer; 103. a hollow interior cavity; 104. a flue; 105. a level gauge; 106. a temperature sensor; 107. a plasma generator;

10. an upper furnace part; 11. a transformation section; 12. drying the pyrolysis reduction section; 13. an oxidation section; 14. a slag section; 15. a material distribution device; 16. a water cooling device; 161. water cooling jacket; 162. supporting the rib plate; 17. an air duct; 171. an annular tube; 172. an air inlet pipe;

20. a furnace lower part; 21. a solution section; 22. a bottom wall; 23. an electrode; 24. a metal outlet; 25. a solution channel; 251. a liquid flowing hole; 252. a rising channel; 253. a main flow channel; 254. a solution outlet;

30. a fixed frame;

40. a bottom support frame; 41. a lift drive; 42. a track.

Detailed Description

In order to explain technical contents and structural features of the present invention in detail, the following description is made with reference to the embodiments and the accompanying drawings.

Referring to fig. 1 and 2, the present invention provides a plasma gasification melting furnace 100, which comprises a furnace body for burning and decomposing solid waste, wherein the furnace body is provided with an air pipe 17 for blowing air, a material distribution device 15 for feeding material, and a plasma generator 107 for generating plasma. The furnace body is provided with a hollow inner cavity 103, the material is distributed into the hollow inner cavity 103 through a material distribution device 15 positioned at the top of the furnace body, and the solid waste is combusted and melted in the hollow inner cavity 103. Specifically, the furnace body includes a furnace upper portion 10 and a furnace lower portion 20, and the furnace upper portion 10 is detachably mounted to the furnace lower portion 20 and forms the hollow cavity 103 for burning the molten solid waste. The hollow cavity 103 sequentially comprises a conversion section 11, a drying pyrolysis reduction section 12, an oxidation section 13, a slag section 14 and a solution section 21 from top to bottom, wherein the conversion section 11, the drying pyrolysis reduction section 12, the oxidation section 13 and the slag section 14 are positioned on the upper portion 10 of the furnace, and the solution section 21 is positioned on the lower portion 20 of the furnace. Wherein, a first included angle A' is formed between the wall body of the conversion section 11 and the wall body of the dry pyrolysis reduction section 12 to reduce the resistance of the material descending. A second included angle B' is formed between the wall body of the oxidation section 13 and the wall body of the slag section 14, so that the materials can be fully combusted at the slag section 14.

In this embodiment, the dry pyrolysis reduction section 12 is in a circular truncated cone shape with a small top and a large bottom, the circular truncated cone taper of the dry pyrolysis reduction section 12 is an angle a, the larger the first included angle formed between the wall body of the conversion section 11 and the wall body of the dry pyrolysis reduction section 12 is, the larger the circular truncated cone taper is, the smaller the first included angle is, the smaller the circular truncated cone taper is, and the angle a +90 °. The influence of the angle A on the reasonable distribution of the flue gas flow and the material smooth movement is large. The small angle A is beneficial to the reduction of furnace burden, but the edge flue gas flow is easy to develop, and the excessive development of the edge flue gas flow can be caused when the angle A is too small, so that the coke ratio is increased. The large angle A is beneficial to inhibiting the edge flue gas flow, but is not beneficial to furnace burden descending and is not beneficial to furnace body smooth running. Therefore, the design value of the angle A is preferably between 81 and 85 degrees.

In addition, the slag section 14 is in a circular truncated cone shape with large top and small bottom, the circular truncated cone taper of the slag section 14 is less, the larger the included angle B ' formed between the wall body of the oxidation section 13 and the wall body of the slag section 14 is, the smaller the circular truncated cone taper of the slag section 14 is, the smaller the included angle B ' is, the larger the circular truncated cone taper of the slag section 14 is, and the angle B ' is 180-B +90 degrees. The solid waste is changed into ash slag after passing through the oxidation section 13, and falls into the slag section 14H4, and the volume is reduced after combustion. The slag section 14 is in a circular truncated cone shape with a large upper part and a small lower part, and a locking notch can be formed, and preferably, the angle B is between 135 degrees and 165 degrees. Because the slag section 14 is in a circular truncated cone shape with a large top and a small bottom, the diameter is gradually reduced, air is blown to the central position in the furnace more easily, and the air uniformly penetrates through the slag section 14 to the oxidation section 13, so that the oxidation section 13 is uniformly combusted, oxygen is needed for combustion, the oxidation section 13 generates a self-absorption principle, and the air is more easily and uniformly distributed.

Compared with the prior art, the utility model discloses a plasma gasification melting furnace 100 divide into stove upper portion 10 and stove lower part 20, and stove upper portion 10 and stove lower part 20 are detachable and install together to convenient dismantlement is overhauld. Furnace upper portion 10 includes conversion section 11, dry pyrolysis reduction section 12, oxidation section 13 and sediment section 14, forms first contained angle between the wall body of conversion section 11 and the wall body of dry pyrolysis reduction section 12, is provided with first contained angle and can reduces the frictional resistance that the hazardous waste descends, avoids forming the material and encircles, can reduce phenomenons such as the interior slag wall built-up of oven, nodulation. Form the second contained angle between the wall body of oxidation section 13 and the wall body of sediment section 14, set up the second contained angle and can play certain cushioning effect, make the material stop and fully burn in sediment section 14 department, the material becomes the lime-ash after oxidation section 13 reaction, fall into sediment section 14, because the volume diminishes after the burning, it can present the fore shaft at sediment section 14 to set up the second contained angle, make the lime-ash can stop longer time in order to carry out abundant burning in sediment section 14, can avoid material central point to burn incomplete phenomenon. The utility model discloses a plasma gasification melting furnace 100 can reduce phenomenons such as the interior slag wall built-up of oven, nodulation, can promote again to burn and overhaul the convenience.

Referring to fig. 1 and 2, in some alternative embodiments, the lower furnace portion 20 includes a bottom wall 22 inclined at a predetermined angle, i.e., the bottom wall 22 has different thicknesses and is in a state of being higher at one side and lower at the other side. Specifically, the solution section 21, i.e., the furnace lower portion 20, is provided with a metal outlet 24 for discharging metal at a side near the lower end of the bottom wall 22. The solid waste contains a lot of metal substances, the solution section 21 is internally provided with an electrode 23, and if the metal content in the molten pool is too high to reach the position of the graphite electrode 23, the short circuit of the electrode 23 can be caused. Therefore, it is necessary to discharge the metal in the solution section 21 periodically, open the metal outlet 24, and more conveniently discharge the metal substance decomposed after the combustion because the bottom wall 22 is inclined and the metal outlet 24 is opened at the lower end of the bottom wall 22. It will be appreciated that the preset angle may be between 0 and 45. Preferably, the preset angle is 5-15 degrees, as long as the metal can be more conveniently discharged without influencing the whole structure.

Referring to fig. 1 and 2, in some alternative embodiments, the solution section 21 further defines a solution channel 25, and the solution channel 25 includes a flow hole 251, a rising channel 252, a main channel 253, and a solution outlet 254, which are communicated with each other. The solution section 21 and the solution channel 25 are provided with electrodes 23, and the solution outlet 254 is also provided with a plasma generator 107. The solution passes through the flow hole 251, the rising channel 252, the main flow channel 253, and then flows out from the solution outlet 254. Electrodes 23 are provided in the solution section 21 and the solution passage 25 to melt the ash, which forms a molten pool in the solution section 21. A plasma generator 107 is provided at the melt outlet 254 to heat the melt in the channel to prevent the melt outlet from clogging.

Referring to fig. 1 and 2, in alternative embodiments, a ductwork 17 is provided in the furnace upper portion 10 and communicates with the slag section 14. The air pipe 17 comprises an annular pipe 171 and an air inlet pipe 172, the air inlet pipe 172 is communicated with the hollow inner cavity 103 and the annular pipe 171, a plurality of through holes for the air inlet pipe 172 to penetrate are formed in the wall body of the slag section 14, one end of the air inlet pipe 172 supplies air to the furnace, and the other end of the air inlet pipe 172 is connected into the annular pipe 171. The annular pipe 171 is provided with at least one air inlet for air inlet, and the annular pipe 171 is arranged to prevent the temperature in the furnace from directly radiating from the air inlet pipe 172, thereby effectively reducing the heat loss in the furnace body. In addition, the annular pipe 171 is arranged, when the oxygen content in the furnace needs to be improved, only the air inlet of the annular pipe 171 needs to be blasted, and the operation is more convenient. In this embodiment, in order to avoid incomplete incineration of the central part of the material, an air duct 17 is arranged in the area of the slag portion 14, where there may be gaps due to the connection of the slag portion 14 with the furnace lower part 20. The slag section 14 is in a circular table shape with a large top and a small bottom, the diameter of the lower part of the slag section 14 is smaller, the slag section 14 is provided with an air pipe 17, air is blown to the central position in the furnace more easily, the air uniformly penetrates through the slag section 14 to the oxidation section 13, so that the oxidation section 13 is uniformly combusted, oxygen is needed for combustion, the oxidation section 13 generates a self-absorption principle, and the air is more uniformly distributed.

Referring to fig. 1 and 2, in some alternative embodiments, the oxidation section 13 is further provided with a water cooling device 16, the water cooling device 16 includes a water cooling jacket 161 and a support rib plate 162, and the support rib plate 162 is installed at an outer side of the water cooling jacket 161 for supporting and fixing the water cooling jacket 161. The plasma generators 107 are respectively arranged in a circumferential direction around the water cooling jacket 161. The water cooling jacket 161 can effectively prevent the slag blocks from being hung on the wall, and the plasma generator 107 can accelerate the reaction of the oxidation section 13. Preferably, the number of the plasma generators 107 is three, and the water jacket 161 is uniformly surrounded, so that the oxidation section 13 generates high-temperature plasma under the action of the plasma generators 107, inorganic matters in the hazardous waste are thoroughly decomposed, and a large amount of heat is provided to the slag. Of course, the number of plasma generators 107 may be other, such as two, four, five, etc. Under the action of the water cooling sleeve 161 and the support rib plate 162, the phenomenon of slag block wall hanging is prevented. Specifically, the water jacket 161 is provided with the temperature sensor 106 of the oxidation stage 13 so as to observe the condition of the reaction temperature.

Referring to fig. 1 and 2, in some alternative embodiments, a fixing frame 30 for fixing the furnace upper portion 10 and a bottom supporting frame 40 for fixedly supporting the furnace lower portion 20 are further disposed on the furnace body, the furnace upper portion 10 is fixedly connected to the fixing frame 30, the bottom supporting frame 40 extends into the fixing frame 30, and the furnace lower portion 20 is mounted on the bottom supporting frame 40. Specifically, the bottom support frame 40 includes a rail 42 horizontally disposed and extending into the fixed frame 30 and a lifting driver 41 slidably disposed on the rail 42, and the lower portion of the furnace body is mounted at the output end of the lifting driver 41. The whole furnace body can be fixedly supported by arranging the fixed frame 30 and the bottom support frame 40, so that the structure of the furnace body is more stable. By providing the elevating driver 41 so that the furnace lower portion 20 is close to or far from the furnace upper portion 10, quick maintenance is facilitated. It will be understood that the upper furnace portion 10 is fixedly connected to the fixing frame 30, and the upper furnace portion 10 is supported and fixed by the fixing frame 30. And the bottom supporter 40 is inserted into the fixing frame 30, and the furnace lower part 20 is installed at the bottom supporter 40. In this embodiment, the bottom supporter 40 includes a rail 42 horizontally disposed and extended into the fixing frame 30 and a lifting driver 41 slidably installed on the rail 42, the furnace lower portion 20 is installed at an output end of the lifting driver 41, and the furnace lower portion 20 is driven by the lifting driver 41 to move into and out of engagement with the furnace upper portion 10. The lifting actuator 41 is a hydraulic cylinder, but the lifting actuator 41 may be a linear motor or an air cylinder according to actual needs, and thus the invention is not limited thereto.

The working principle of the plasma gas melting integrated furnace of the present invention is explained with reference to the attached drawings 1 and 2:

the upper furnace part 10 and the lower furnace part 20 in the furnace body both comprise a steel shell 101 and a fire-resistant layer 102, and the fire-resistant layer 102 sequentially comprises a nano heat-insulating plate, a zirconium-containing ceramic semi-hard brick, a mullite heat-insulating brick, a sealing filler and a zirconium-chromium corundum brick from outside to inside. The upper furnace portion 10 is divided into a reforming section 11, a dry pyrolysis reduction section 12, an oxidation section 13, and a slag section 14, and a solution section 21 is located in the lower furnace portion 20. Wherein, the drying pyrolysis reduction section 12, the oxidation section 13, the slag section 14 and the solution section 21 are all provided with temperature sensors 106. A temperature sensor 106 is provided to monitor and feed back the temperature of each reaction zone. In fig. 2, the left size designation H1 designates the range of the reforming section 11, the size designation H2 designates the range of the dry pyrolysis reduction section 12, the size designation H3 designates the range of the oxidation section 13, the size designation H4 designates the range of the slag section 14, and the size designation H5 designates the range of the solution section 21.

When material (such as but not limited to hazardous waste) is uniformly distributed from the distribution device 15 into the hollow cavity 103 in the conversion section 11, the level inside the furnace is observed by the level gauge 105. Dangerous waste drops in dry pyrolysis reduction section 12 through conversion section 11, because dry pyrolysis reduction section 12 is the right circular platform form, the volume shrink after its shape adapts to the inflation of the volume of dangerous waste after being heated and flue gas stream cooling, is favorable to reducing the frictional resistance that dangerous waste descends, avoids forming the material and encircles. Meanwhile, the dry pyrolysis reduction section 12 is installed with a temperature sensor 106 for a dry layer, a temperature sensor 106 for a pyrolysis layer, and a temperature sensor 106 for a reduction layer to detect the temperature of each layer of the dry pyrolysis reduction section 12, respectively.

The treatment of the hazardous waste entering the dry pyrolysis reduction section 12 by the dry pyrolysis reduction section 12 comprises the following steps: after the dangerous waste enters the drying pyrolysis reduction section 12, water is separated out under the action of heat. The drying stage is carried out at 100-250 ℃, and the pyrolysis reaction is started when the temperature is increased to more than 300 ℃. At 300-800 ℃, the organic components in the hazardous waste can release about 70% of volatile components, and meanwhile, the high energy density input of the plasma generator accelerates and promotes the decomposition of the organic components. The volatile matters separated out by the pyrolysis reaction mainly comprise hydrocarbon, hydrogen, water vapor, carbon monoxide, carbon dioxide, methane, tar and the like.

The pyrolysis reaction equation is: CxHyOz → C(s) + H2+ H2O + CO + CO2+ CH4+ Tar

The reduction process is an anoxic environment, and combustion products and water vapor in the lower oxidation stage 13 react with carbon in the reduction layer to generate H2, CO and the like.

The main reaction is as follows: CO + C → CO; H2O + C → H2+ CO

After the hazardous waste is subjected to the three drying, pyrolysis and reduction stages, the residual fixed carbon and air introduced by the air pipe 17 are subjected to chemical reaction, and a large amount of heat is released to support drying, pyrolysis and subsequent reduction reaction of the hazardous waste. The main reaction is as follows: c + O2 → CO2

And the waste treated by the drying, pyrolysis and reduction section 12 enters the oxidation section 13, and as the reaction temperature of the oxidation section 13 is 900-1200 ℃, the temperature is too high, part of the waste reaches the ash melting point, and three plasma generators 107 are uniformly arranged on the oxidation section 13, but not limited to three. High-temperature plasma is generated under the action of the plasma generator 107, inorganic matters in the dangerous waste materials are thoroughly decomposed, a large amount of heat is provided for slag, and meanwhile, the oxidation section 13 comprises a water cooling sleeve 161 and a support rib plate 162 structure, so that the phenomenon of slag block wall hanging can be prevented.

The waste will turn into ash after passing through the oxidation stage 13 and fall into the slag stage 14, the temperature of the slag stage 14 being sensed by a temperature sensor 106 located in the slag stage 14.

The material after passing through the slag section 14 finally falls into the solution section 21, and the solution section 21 is provided with a temperature sensor 106 for observing the temperature condition of the solution section 21. The joint between the upper part and the lower part of the furnace body is sealed by connecting the upper part and the lower part in a mode of combining glass water and high-temperature soil, wherein the temperature resistance of the high-temperature soil can reach more than 1800 ℃. And the high-temperature molten liquid inside the sealing device is condensed into blocks when flowing outwards, and the sealing effect is also achieved.

In addition, because the solution section 21 is provided with the electrode 23, ash falling into the solution section 21 provides melting temperature, the solution is formed after melting, the solution enters the flow hole 251, passes through the ascending channel 252 to the main channel 253 and then flows out from the solution outlet 254, and the plasma generator 107 is arranged at the solution outlet 254 so as to heat the solution in the channel and prevent the melt outlet from being blocked. The lower part of the furnace body is supported by the bottom support frame 40, and the bottom support frame 40 comprises a track 42 and a lifting driver 41, so that the maintenance of the lower part of the furnace body is convenient.

And the micro negative pressure is kept in the furnace to ensure that harmful gas is not discharged outside, the flue gas enters the conversion section 11 after passing through the drying pyrolysis oxidation section 13 and then passes through the flues 104 on the left side and the right side of the top, the number of the flues 104 can be increased or reduced according to actual needs, and a plurality of flues 104 are converged to one main flue and then reach the second combustion chamber.

The above disclosure is only a preferred embodiment of the present invention, and the scope of the claims of the present invention should not be limited thereby, and all the equivalent changes made in the claims of the present invention are intended to be covered by the present invention.

Claims (10)

1. A plasma gasification melting furnace comprises a furnace body for burning and decomposing solid wastes, wherein the furnace body is provided with an air pipe for blowing air, a material distribution device for feeding materials and a plasma generator for generating plasma; the device is characterized in that the furnace body is provided with a hollow inner cavity, the furnace body comprises a furnace upper part and a furnace lower part, the furnace upper part is detachably arranged on the furnace lower part and forms the hollow inner cavity, the hollow inner cavity sequentially comprises a conversion section, a drying pyrolysis reduction section, an oxidation section, a slag section and a solution section from top to bottom, the conversion section, the drying pyrolysis reduction section, the oxidation section and the slag section are positioned on the furnace upper part, the solution section is positioned on the furnace lower part, and a first included angle is formed between a wall body of the conversion section and a wall body of the drying pyrolysis reduction section so as to reduce the resistance of material descending; and a second included angle is formed between the wall body of the oxidation section and the wall body of the slag section, so that the materials are fully combusted at the slag section.

2. The plasma gasification melter of claim 1 wherein the lower furnace portion includes a bottom wall that is inclined at a predetermined angle.

3. A plasma gasification furnace as claimed in claim 2 wherein the solution section is provided with a metal outlet for discharging metal at a side adjacent the lower end of the bottom wall.

4. The plasma gasification melting furnace of claim 1, wherein the solution section is further provided with a solution channel, the solution channel comprises a flow cavity, a rising channel, a main channel and a solution outlet which are communicated with each other, and the plasma generator is arranged at the solution outlet.

5. A plasma gasification melting furnace according to claim 4, wherein an electrode is further provided in the hollow inner chamber, the electrodes being arranged at the solution section and the solution channel, respectively.

6. The plasma gasification melter of claim 1, wherein the ductwork is disposed in the upper furnace portion and communicates with the slag section.

7. The plasma gasification melting furnace of claim 1, wherein the oxidation section comprises a water cooling jacket and support rib plates, the support rib plates are mounted at the outer side of the water cooling jacket, and the plasma generators are respectively arranged in a circumferential direction around the water cooling jacket.

8. The plasma gasification melting furnace of claim 1, wherein the furnace body is further provided with a fixing frame for fixing the upper part of the furnace and a bottom support frame for fixedly supporting the lower part of the furnace, the upper part of the furnace is fixedly connected with the fixing frame, the bottom support frame extends into the fixing frame, and the lower part of the furnace is mounted on the bottom support frame.

9. The plasma gasification melting furnace of claim 8, wherein the bottom support frame comprises a rail horizontally arranged and extending into the fixed frame and a lifting driver slidably disposed on the rail, and the lower furnace body is mounted at an output end of the lifting driver.

10. The plasma gasification melter of claim 1, wherein the dry pyrolysis reduction section, the oxidation section, the slag section, and the solution section are each provided with a temperature sensor.

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