CN217058190U - Blast furnace electric drying furnace for replacing charcoal fire - Google Patents

Abstract

The utility model relates to a blast furnace electric drying furnace for replacing charcoal fire, which comprises a furnace body, one side of the furnace body is provided with an air blower, one side of the furnace body is positioned above the air blower and is provided with a push rod, a plurality of end-to-end drying frames are arranged above the furnace body, the top of the uppermost drying frame is provided with a sealing top cover, both sides of the periphery of the drying frames are fixedly connected with connecting blocks, the bottom of each connecting block is fixedly connected with a connecting column, the upper side of the periphery of the drying frames is provided with a plurality of air outlets which are uniformly distributed in equal angles, an exhaust pipe is arranged at the center of the inner side of each drying frame, a bearing net cage for containing tea leaves to be dried is arranged between the drying frames and the exhaust pipe, hot air is guided through the exhaust pipe, thereby the tea leaves in each drying frame are stably and uniformly heated, the tea leaves are prevented from being damaged due to overheating, and different numbers of air outlets are shielded through shielding pieces, thereby controlling the temperature in the drying rack and adjusting the temperature in a targeted manner.

Description

Blast furnace electric drying furnace for replacing charcoal fire

Technical Field

The utility model relates to a tealeaves stoving technical field, concretely relates to blast furnace electricity drying furnace for replacing charcoal fire.

Background

The tea water content of the green tea after rolling is still very high, if the green tea is directly fried to be dry, the green tea can be quickly agglomerated in a pan of a roasting machine, so that tea juice is adhered to a pan wall, therefore, the tea needs to be dried by a drying oven firstly, the water content is reduced to meet the frying requirement of the pan, in the drying oven, the tea is layered through a drying rack, and the tea is uniformly dried in a drying oven in a cuboid shape or a cylindrical shape, as shown in figure 1.

The utility model patent document with publication number CN207379170U discloses a tea leaf drying machine, which comprises a tea leaf drying furnace, wherein the tea leaf drying furnace is connected with a hot blast stove, an air hot air mixing system is arranged between the hot blast stove and the drying machine, the air hot air mixing system comprises a gas pipe, a blower and a vent pipe, one end of the gas pipe is connected with the hot blast stove through a flange plate, and the other end of the gas pipe is connected with the blower; the air pipe comprises an air inlet end positioned in air and an air outlet end positioned in the air pipe, an inclined communicating end is arranged between the air inlet end and the air outlet end, the air pipe is arranged around the air pipe for a circle and is communicated with the air outside the air pipe, and a thermometer is arranged on the air pipe; the tea leaf drying furnace comprises a cover-free closed furnace body, a drying net is arranged inside the furnace body, an air inlet is arranged on one side of the furnace body and below the drying net, a first valve is arranged at the air inlet, and an air guide assembly is arranged below the drying net.

The current blast furnace electricity drying oven often is monomer box structure, it is inhomogeneous to lead to the stove temperature distribution often because the heater sets up a certain region at the furnace body when drying to tealeaves, because holistic appearance is injectd, lack multiple assembly and seal structure, can not set up power according to the tealeaves volume of each batch, the utilization ratio in energy utilization and self space is low, can not carry out nimble adjustment according to the demand, often only be applicable to large-scale tea garden, and because all tealeaves are placed jointly in same furnace body, can not carry out drying process to different kind tealeaves at the same time according to the demand in tea garden, can not adjust the temperature in the stove different regions respectively, application scope is narrow, the result of use is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the problem that exists with not enough above-mentioned, provide a blast furnace electricity drying furnace for replacing charcoal fire, promoted holistic work efficiency.

The utility model solves the technical problems that:

(1) the existing blast furnace electric drying furnace is often of a single box type structure, is short of multiple assembling and sealing structures, has low energy utilization rate and low self space utilization rate, and cannot be flexibly adjusted according to requirements;

(2) the existing blast furnace electric drying furnace can not dry different types of tea at the same time according to the requirements of a tea garden and can not respectively adjust the temperature of different areas in the furnace.

The purpose of the utility model can be realized by the following technical scheme: the utility model provides a blast furnace electricity drying furnace for replacing charcoal fire, the induction cooker comprises a cooker bod, one side of furnace body is equipped with the air-blower, the top that one side of furnace body is located the air-blower is provided with the push rod, the top of furnace body is provided with the stoving frame of a plurality of end to end, and the top of the superiors stoving frame installs sealed top cap, the equal fixedly connected with connecting block in both sides of stoving frame periphery, the bottom fixedly connected with spliced pole of connecting block, a plurality of is offered to the periphery upside of stoving frame and is the gas outlet that waits angle evenly distributed, the inboard center department of stoving frame installs the exhaust pipe, be provided with the box with a net of accepting that is used for holding the tea leaf of waiting to dry between stoving frame and the exhaust pipe.

Preferably, the top of furnace body and the top of stoving frame all inlay and be equipped with the butt joint sealing ring, and the top of furnace body is located the butt joint sealing ring inboard and inlays and be equipped with the heat insulating board, and the center department of heat insulating board has seted up the air outlet, lies in on the heat insulating board to offer around the air outlet to be used for with the butt joint annular of exhaust pipe butt joint usefulness.

Preferably, the top of connecting block is seted up with the butt joint round hole of spliced pole butt joint usefulness, the top of furnace body lie in the both sides of butt joint sealing ring seted up with the draw-in groove of spliced pole joint usefulness.

Preferably, the filter screen is installed in the inboard concatenation of gas outlet, and the periphery of stoving frame is located the equal fixedly connected with two guide rails that are the symmetry setting in both sides of every gas outlet, and the outside of every gas outlet all is provided with shelters from the piece.

Preferably, the side face of the shielding piece is connected with the guide rail in a sliding mode, the two sides of the shielding piece are provided with limiting bolts, and the limiting bolts penetrate through the shielding piece and are in threaded connection with the shielding piece.

Preferably, the annular seal groove has been seted up at the top of butt joint sealing ring, is provided with the closed ring in the annular seal groove, the equal fixedly connected with in the bottom of seal cap's bottom and the bottom of stoving frame and the butt joint sealing washer of butt joint sealing ring looks adaptation, the annular closed groove with closed ring looks adaptation is seted up to the bottom of butt joint sealing washer.

Preferably, the gim peg is installed to one side of connecting block, the gim peg run through the lateral wall of connecting block and with connecting block threaded connection, dock with the spliced pole through the butt joint round hole, the both sides of seal cap are equipped with the knee with butt joint round hole looks adaptation.

Preferably, link to each other through spacing between stoving frame and the exhaust pipe, spacing includes outer loop, inner ring and connective bar, and the outer loop passes through the inside wall fixed connection of bolt and stoving frame, and the outer loop passes through the lateral wall fixed connection of bolt and exhaust pipe, and outer loop and inner ring are continuous through a plurality of connective bar that is the equal angle evenly distributed.

Preferably, the bottoms of the limiting frame and the receiving net cage are mutually butted, the receiving net cage is arranged in the drying frame through the support of the limiting frame, and the top of the receiving net cage is flush with the top of the air outlet.

Preferably, the bottom fixedly connected with of exhaust pipe is used for with the sealed butt joint circle of butt joint annular, the butt joint annular has been seted up at the top of exhaust pipe, the pipe wall of exhaust pipe is close to one side periphery of butt joint circle and link up and has seted up a plurality of and be the hot-blast mouth that the equal angle evenly distributed.

The beneficial effects of the utility model are that:

(1) when in use, a plurality of drying frames are assembled together and installed on a furnace body, the drying frames are butted with a connecting column through a butting circular hole, so that the drying frames are assembled together, after all the drying frames are stacked and installed on the furnace body, the connecting column is stably connected with the butting circular hole and a bent rod is stably connected with the butting circular hole through screwing a fixing bolt, meanwhile, the furnace body is clamped with the connecting column at the lowest layer through clamping grooves at two sides, so that the drying frames are kept stable after being stacked, the butting sealing ring is in sealing butt joint with the butting sealing ring, rubber sealing rings are fixedly connected at the top of the butting sealing ring, the top of the closed ring and the bottom of the butting sealing ring, so that the air tightness of the butting sealing ring and the butting sealing ring is kept during sealing butt joint, air leakage is avoided, and the temperature in the drying frames is kept stable in the drying process, then a heater in the oven body is started, air in the surrounding environment is continuously filtered by an air blower and then is introduced into the oven body, the air is heated to a proper temperature by the heater and then is discharged into an exhaust pipe through an air outlet, the exhaust pipe in the middle of each drying rack is communicated end to end through the sealed butt joint of a butt joint ring and a butt joint ring groove, the exhaust pipe at the lowest layer is in sealed butt joint with the air outlet of the oven body, a sealing block matched with the top pipe orifice of the exhaust pipe at the uppermost layer is arranged in the center of the inner side of a sealing top cover, when hot air of the oven body is conveyed into each drying rack through a hot air port of each exhaust pipe, the hot air is uniformly discharged from the hot air port and heats tea leaves at the bottom of the bearing net cage, the hot air is upwards conducted through gaps among the tea leaves and then discharged through the parts of which are not blocked by the air outlet, so that the tea leaves in the bearing net cage are heated by the hot air, thereby make the temperature in the frame of drying promote to required temperature to carrying the tealeaves in the box with a net and carrying on the even heating, tealeaves is heated the back and contains the steam evaporation and get into in hot-blast and through the outside of gas outlet discharge stoving frame, leads hot-blast through the exhaust pipe, avoids because stoving frame builds each other and adds and lead to being heated unevenly, thereby all keeps stable and evenly heats the tealeaves in every stoving frame, prevents that tealeaves is overheated impaired.

(2) When a plurality of drying frames are stacked and installed on the furnace body, the baffle plates isolate the adjacent drying frames to avoid the mutual circulation interference of hot air in different drying frames, thereby avoiding the air cross when the drying frames simultaneously dry different types of tea with different requirements, preventing the mutual interference of the tea, preventing the damage of the tea, shielding different numbers of air outlets by the shielding sheets when the hot air output by the furnace body is used for drying the tea in the drying frames, thereby controlling the temperature in the drying frames, sliding the shielding sheets on the guide rails to proper positions when shielding, rotating the limit bolts to ensure that the limit bolts are abutted with the side walls of the drying frames, thereby limiting the positions of the shielding sheets, discharging the damp-heat air in the drying frames by the exposed parts after the air outlets are shielded, and performing targeted drying treatment on the different types of tea at the same time according to the requirement of a tea garden, the temperature in each drying rack is adjusted in a targeted manner, so that the drying quality of the tea leaves in each drying rack is ensured, and different tea leaves can be treated in a targeted manner according to actual requirements.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a schematic top view of the furnace body of the present invention;

fig. 4 is a schematic side view of the drying rack of the present invention;

FIG. 5 is a schematic side view of the internal structure of the drying rack of the present invention;

in the figure: 1. a furnace body; 2. a blower; 3. a drying rack; 4. sealing the top cover; 5. connecting blocks; 6. connecting columns; 7. an air outlet; 8. receiving the net cage; 9. a heat insulation plate; 10. butting the ring grooves; 11. an air outlet; 12. butting circular holes; 13. a shielding sheet; 14. a guide rail; 15. a limit bolt; 16. a fixing bolt; 17. butting a sealing ring; 18. a closed ring; 19. butting a sealing ring; 20. a limiting frame; 21. an exhaust duct; 22. a butt joint ring; 23. a hot air port.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the objects of the present invention, the following detailed description is given to the embodiments, structures, features and effects according to the present invention with reference to the accompanying drawings and preferred embodiments.

Please refer to fig. 2-5: the utility model provides a blast furnace electricity drying furnace for replacing charcoal fire, including furnace body 1, one side of furnace body 1 is equipped with air-blower 2, the top that one side of furnace body 1 is located air-blower 2 is provided with the push rod, the top of furnace body 1 is provided with a plurality of end to end's stoving frame 3, and the top of the superiors stoving frame 3 installs seal cap 4, the equal fixedly connected with connecting block 5 in both sides of stoving frame 3 periphery, the bottom fixedly connected with spliced pole 6 of connecting block 5, the gas outlet 7 that a plurality of is equal angular uniform distribution is seted up to the periphery upside of stoving frame 3, the inboard center department of stoving frame 3 installs exhaust pipe 21, be provided with between stoving frame 3 and the exhaust pipe 21 and be used for holding the accepting box with a net 8 of treating the tea leaf of drying.

The top of the furnace body 1 and the top of the drying rack 3 are both embedded with butt sealing rings 17, the top of the furnace body 1 is positioned at the inner sides of the butt sealing rings 17 and is embedded with a heat insulation plate 9, the center of the heat insulation plate 9 is provided with an air outlet 11, the heat insulation plate 9 is positioned at the periphery of the air outlet 11 and is provided with butt ring grooves 10 for butt joint with the exhaust pipe 21, the top of the connecting block 5 is provided with butt round holes 12 for butt joint with the connecting posts 6, the top of the furnace body 1 is positioned at the two sides of the butt sealing rings 17 and is provided with clamping grooves for clamping with the connecting posts 6, a heater for heating air is arranged inside the furnace body 1, when in use, the heater inside the furnace body 1 is started firstly, then air in the surrounding environment is continuously filtered by the air blower 2 and then is introduced into the furnace body 1, the air is heated to a proper temperature by the heater and then is discharged into the exhaust pipe 21 through the air outlet 11, carry hot-blast to the frame of drying 3 in through the exhaust pipe 21 in every frame of drying 3, thereby make the temperature in the frame of drying 3 promote to required temperature, and carry out the even heating to the tealeaves of accepting in the net case 8, tealeaves is heated the back and contains the steam evaporation and get into in hot-blast and through the outside of gas outlet 7 discharge frame of drying 3, guide hot-blast through exhaust pipe 21, avoid because the frame of drying 3 is built each other and is added and lead to being heated unevenly, thereby all keep stable and heat evenly to the tealeaves in every frame of drying 3, prevent that tealeaves is overheated impaired.

The filter screen is spliced and installed on the inner side of the air outlet 7, two guide rails 14 which are symmetrically arranged are fixedly connected to the two sides of each air outlet 7 on the periphery of the drying rack 3, a shielding piece 13 is arranged on the outer side of each air outlet 7, each shielding piece 13 corresponds to each pair of guide rails 14, the side surface of each shielding piece 13 is in sliding connection with the guide rails 14, limiting bolts 15 are installed on the two sides of each shielding piece 13, each limiting bolt 15 penetrates through each shielding piece 13 and is in threaded connection with the shielding piece 13, the end parts of the limiting bolts 15 are mutually abutted to the drying rack 3, when the tea leaves in the drying rack 3 are dried by using hot air output by the furnace body 1, the shielding pieces 13 shield different numbers of air outlets 7, so that the temperature in the drying rack 3 is controlled, when the shielding pieces 13 slide to proper positions on the guide rails 14 during shielding, the limiting bolts 15 are rotated, and the limiting bolts 15 are abutted to the side walls of the drying rack 3, thereby spacing the position of sheltering from piece 13, the part that exposes after being sheltered from through gas outlet 7 is with the discharge of the damp and hot gas in the frame 3 of drying to according to the tealeaves quantity and the kind in the frame 3 of drying, adjust the temperature in the frame 3 of drying, thereby ensure the drying quality of tealeaves.

The top of the butt sealing ring 17 is provided with an annular sealing groove, a sealing ring 18 is arranged in the annular sealing groove, the sealing ring 18 is fixedly connected with the butt sealing ring 17, the bottom of the sealing top cover 4 and the bottom of the drying rack 3 are both fixedly connected with a butt sealing ring 19 matched with the butt sealing ring 17, the bottom of the butt sealing ring 19 is provided with an annular sealing groove matched with the sealing ring 18, one side of the connecting block 5 is provided with a fixing bolt 16, the fixing bolt 16 penetrates through the side wall of the connecting block 5 and is in threaded connection with the connecting block 5, when a plurality of drying racks 3 are assembled together and installed on the furnace body 1, the drying racks are in butt joint with the connecting column 6 through the butt joint circular holes 12, so that the drying racks 3 are assembled together, the two sides of the sealing top cover 4 are provided with bent rods matched with the butt joint circular holes 12, after all the drying racks 3 are stacked and installed on the furnace body 1, the fixing bolts 16 are screwed tightly, make between spliced pole 6 and butt joint round hole 12 and knee and the butt joint round hole 12 stable connection, simultaneously furnace body 1 passes through the draw-in groove of both sides and the spliced pole 6 looks joint of lower floor, thereby make stoving frame 3 stack and keep stable after adding, carry out sealed butt joint through butt joint sealing ring 17 and butt joint sealing washer 19, the top of butt joint sealing ring 17, the equal fixedly connected with rubber seal in the top of airtight ring 18 and the bottom of butt joint sealing washer 19, thereby ensure that butt joint sealing ring 17 and butt joint sealing washer 19 keep the gas tightness when sealed butt joint, avoid gas leakage, thereby ensure that the temperature in the in-process stoving frame 3 keeps stable.

The drying rack 3 is connected with the exhaust pipe 21 through the limiting rack 20, the limiting rack 20 comprises an outer ring, an inner ring and connecting rods, the outer ring is fixedly connected with the inner side wall of the drying rack 3 through bolts, the inner ring is fixedly connected with the outer side wall of the exhaust pipe 21 through bolts, the outer ring is connected with the inner ring through a plurality of connecting rods which are uniformly distributed in equal angles, the bottom of the limiting rack 20 is butted with the bottom of the bearing net cage 8, the bearing net cage 8 is supported and installed in the drying rack 3 through the limiting rack 20, the top of the bearing net cage 8 is flush with the top of the air outlet 7, the bottom of the exhaust pipe 21 is fixedly connected with a butt ring 22 which is hermetically butted with the butt ring groove 10, the top of the exhaust pipe 21 is provided with a butt ring groove 10, the periphery of one side of the pipe wall of the exhaust pipe 21 close to the butt ring 22 is provided with a plurality of hot air outlets 23 which are uniformly distributed in equal angles, when in use, the exhaust pipe 21 in the middle of each drying rack 3 is communicated end to end through the sealed butt joint of the butt ring 22 and the butt ring groove 10, the exhaust pipes 21 at the lowest layer are in sealing butt joint with the air outlet 11 of the furnace body 1, the sealing block matched with the pipe orifice at the top of the exhaust pipe 21 at the uppermost layer is arranged at the center of the inner side of the sealing top cover 4, when hot air of the furnace body 1 is conveyed into each drying rack 3 through the hot air port 23 of each exhaust pipe 21, the hot air is uniformly discharged from the hot air port 23 and heats tea leaves at the bottom of the bearing net box 8, the hot air is upwards conducted through gaps among the tea leaves and discharged through the part which is not shielded by the air outlet 7, so that the tea leaves in the bearing net box 8 are heated through the hot air, the hot air is guided through the exhaust pipes 21, the uneven heating of all the drying racks 3 caused by the hottest due to the closest approach to the furnace body 1 is prevented, the temperature and the air outlet quantity are controlled through the shielding of the shielding sheets 13 and the air outlet 7, and the corresponding adjustment of the temperature in each drying rack 3 can be ensured when one furnace body 1 is shared, thereby improving the energy utilization rate and ensuring the tea quality.

Be equipped with between the inboard bottom outside of drying frame 3 and exhaust pipe 21 and be used for the separation baffle between the different stoving frame 3 of separation, when a plurality of stoving frame 3 was built and is installed on the furnace body 1, separate baffle and isolated adjacent stoving frame 3, avoid the steam mutual circulation interference in the different stoving frame 3, thereby avoid putting up 3 while to different types through a plurality of stoving, cross gas appears when the tealeaves of different requirements is dried, prevent tealeaves mutual interference, thereby prevent that tealeaves is impaired.

When the utility model is used, a plurality of drying frames 3 are assembled together and installed on the furnace body 1 by a worker, and are butted with the connecting column 6 through the butting circular hole 12, so that a plurality of drying frames 3 are assembled together, after all the drying frames 3 are stacked and installed on the furnace body 1, the connecting column 6, the butting circular hole 12, the bent rod and the butting circular hole 12 are stably connected through screwing the fixing bolt 16, meanwhile, the furnace body 1 is clamped with the connecting column 6 at the lowest layer through the clamping grooves at two sides, so that the drying frames 3 are stably kept after being stacked, the butting sealing ring 17 and the butting sealing ring 19 are in sealing butt joint, rubber sealing rings are fixedly connected with the top of the butting sealing ring 17, the top of the sealing ring 18 and the bottom of the butting sealing ring 19, thereby ensuring that the butting sealing ring 17 and the butting sealing ring 19 keep air tightness during sealing butt joint, air leakage is avoided, so that the temperature in the drying frames 3 is kept stable in the drying process, then a heater in the oven body 1 is started, then air in the surrounding environment is continuously filtered by the air blower 2 and then introduced into the oven body 1, the air is heated to a proper temperature by the heater and then is discharged into the exhaust pipes 21 through the air outlets 11, the exhaust pipes 21 in the middle of each drying frame 3 are communicated end to end through the sealing butt joint of the butt joint ring 22 and the butt joint ring groove 10, the exhaust pipes 21 in the lowest layer are in sealing butt joint with the air outlets 11 of the oven body 1, a sealing block matched with the top pipe orifices of the exhaust pipes 21 in the uppermost layer is arranged in the center of the inner side of the sealing top cover 4, when hot air of the oven body 1 is conveyed into each drying frame 3 through the hot air outlets 23 of the exhaust pipes 21, the hot air is uniformly discharged from the hot air outlets 23 and heats tea leaves at the bottom of the carrying net cage 8, the hot air is upwards conducted through gaps among the tea leaves and then discharged through the parts, which are not shielded, of the air outlets 7, so that the tea leaves in the bearing net box 8 are heated through the hot air, the temperature in the drying frame 3 is raised to the required temperature, the tea leaves in the bearing net box 8 are uniformly heated, and water vapor contained in the heated tea leaves is evaporated into the hot air and is discharged out of the drying frame 3 through the air outlets 7;

when a plurality of drying frames 3 are stacked and installed on the furnace body 1, the baffle plate isolates the adjacent drying frames 3, thereby avoiding mutual circulation interference of hot air in different drying frames 3, further avoiding air cross when the drying frames 3 simultaneously dry different types of tea with different requirements, and preventing mutual interference of tea, thereby preventing tea from being damaged, when the hot air output by the furnace body 1 is used for drying the tea in the drying frames 3, the shielding sheets 13 shield different numbers of air outlets 7, thereby controlling the temperature in the drying frames 3, when shielding, the shielding sheets 13 slide on the guide rails 14 to proper positions, then the limiting bolts 15 are rotated, so that the limiting bolts 15 are abutted against the side walls of the drying frames 3, thereby limiting the positions of the shielding sheets 13, and the wet and hot air in the drying frames 3 is discharged through the exposed parts of the air outlets 7 after being shielded, therefore, different types of tea leaves can be subjected to targeted drying treatment at the same time according to the requirements of the tea garden.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed by the preferred embodiment, it is not limited to the present invention, and any person skilled in the art can make modifications or changes equivalent to the equivalent embodiments by utilizing the above disclosed technical contents without departing from the technical scope of the present invention, but all the modifications, changes and changes of the present invention made by the technical matters of the present invention are also within the technical scope of the present invention.

Claims (10)

1. A blast furnace electric drying furnace for replacing charcoal fire comprises a furnace body (1), wherein one side of the furnace body (1) is provided with a blower (2), a push rod is arranged on one side of the furnace body (1) above the blower (2), it is characterized in that a plurality of end-to-end drying racks (3) are arranged above the furnace body (1), and the top of the drying rack (3) at the uppermost layer is provided with a sealing top cover (4), both sides of the periphery of the drying rack (3) are fixedly connected with connecting blocks (5), the bottom of the connecting block (5) is fixedly connected with a connecting column (6), the upper side of the periphery of the drying rack (3) is provided with a plurality of air outlets (7) which are uniformly distributed at equal angles, the inboard center department of stoving frame (3) installs exhaust pipe (21), be provided with between stoving frame (3) and exhaust pipe (21) and be used for holding accepting box with a net (8) of waiting to dry the tealeaves.

2. The blast furnace electric drying furnace for replacing charcoal fire according to claim 1, characterized in that butt joint sealing rings (17) are embedded in the top of the furnace body (1) and the top of the drying rack (3), a heat insulation plate (9) is embedded inside the butt joint sealing rings (17) in the top of the furnace body (1), an air outlet (11) is formed in the center of the heat insulation plate (9), and a butt joint ring groove (10) for butt joint with an exhaust pipe (21) is formed around the air outlet (11) in the heat insulation plate (9).

3. The blast furnace electric drying furnace for replacing charcoal fire as claimed in claim 1, characterized in that the top of the connecting block (5) is provided with a butt circular hole (12) for butt joint with the connecting column (6), and the top of the furnace body (1) is provided with clamping grooves at two sides of the butt sealing ring (17).

4. The blast furnace electric drying furnace for replacing charcoal fire according to claim 1, characterized in that a filter screen is installed on the inner side of the air outlet (7) in a splicing manner, two symmetrically arranged guide rails (14) are fixedly connected to the outer periphery of the drying rack (3) on two sides of each air outlet (7), and a shielding sheet (13) is arranged on the outer side of each air outlet (7).

5. The blast furnace electric drying furnace for replacing charcoal fire as claimed in claim 4, characterized in that the side of the shielding sheet (13) is connected with the guide rail (14) in a sliding way, and both sides of the shielding sheet (13) are provided with limit bolts (15).

6. The blast furnace electric drying furnace for replacing charcoal fire as claimed in claim 2, wherein an annular sealing groove is formed in the top of the butt sealing ring (17), a sealing ring (18) is arranged in the annular sealing groove, the bottom of the sealing top cover (4) and the bottom of the drying rack (3) are both fixedly connected with a butt sealing ring (19) matched with the butt sealing ring (17), and an annular sealing groove matched with the sealing ring (18) is formed in the bottom of the butt sealing ring (19).

7. The blast furnace electric drying oven for replacing charcoal fire as claimed in claim 1, wherein a fixing bolt (16) is installed at one side of the connecting block (5), the fixing bolt (16) penetrates through the side wall of the connecting block (5) and is in threaded connection with the connecting block (5), and is butted with the connecting column (6) through a butting circular hole (12).

8. The blast furnace electric drying furnace for replacing charcoal fire as claimed in claim 1, wherein the drying rack (3) is connected with the exhaust pipe (21) through a limiting rack (20), the limiting rack (20) comprises an outer ring, an inner ring and connecting rods, the outer ring is fixedly connected with the inner side wall of the drying rack (3) through bolts, the inner ring is fixedly connected with the outer side wall of the exhaust pipe (21) through bolts, and the outer ring is connected with the inner ring through a plurality of connecting rods which are uniformly distributed at equal angles.

9. The blast furnace electric drying furnace for replacing charcoal fire as claimed in claim 8, wherein the limiting frame (20) and the bottom of the receiving net cage (8) are butted with each other, and the receiving net cage (8) is installed in the drying rack (3) through the support of the limiting frame (20), and the top of the receiving net cage (8) is flush with the top of the air outlet (7).

10. The blast furnace electric drying furnace for replacing charcoal fire according to claim 1, wherein the bottom of the exhaust pipe (21) is fixedly connected with a butt joint ring (22) for being in sealed butt joint with the butt joint ring groove (10), the butt joint ring groove (10) is formed in the top of the exhaust pipe (21), and a plurality of hot air ports (23) which are uniformly distributed at equal angles are formed in a penetrating manner on the periphery of one side of the pipe wall of the exhaust pipe (21) close to the butt joint ring (22).

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