CN212512156U - Heat supply device for drying furnace pit - Google Patents

Abstract

The application relates to a heating device for a drying kiln pit, which relates to the technical field of drying kiln pits and comprises a main combustion chamber and an air return chamber, wherein an air outlet of the main combustion chamber is communicated with a drying channel, two ends of the air return chamber are respectively communicated with an air inlet of the main combustion chamber and the drying channel, the main combustion chamber is used for generating hot air, and the air return chamber is used for pumping the hot air in the drying channel into the main combustion chamber; this application has the effect of improving the waste of the heat energy.

Description

Heat supply device for drying furnace pit

Technical Field

The application relates to the technical field of drying furnaces and cellars, in particular to a heat supply device for a drying furnace and a cellars.

Background

In woodwork processing, metal product processing and leather goods processing, it is a very important procedure to dry, and the work piece can be infected with more moisture when preliminary treatment, especially woodwork and leather goods, and the moisture content is on the high side, if not fully dry, then lead to woodwork or leather goods to wet the mould very easily, for the drying efficiency who improves all kinds of work pieces, each equipment provider has developed the drying furnace cellar for storing things.

Referring to fig. 1, the drying kiln comprises a drying channel and a heat supply device, two end openings of the drying channel are arranged, the two end openings of the drying channel are respectively arranged as a feeding port and a discharging port, workpieces are conveyed by a hanging conveyor, a belt conveyor or a trolley, the heat supply device is used for generating hot air, and an air outlet of the heat supply device is communicated with the drying channel, so that the hot air generated by combustion of the heat supply device can be conveyed into the drying channel, and finally, the effect of drying the workpieces conveyed in the drying channel is achieved.

In view of the above-mentioned related technologies, the applicant has found that when hot air generated by a heat supply device is directly fed into a drying channel, the hot air still contains a certain amount of heat although the temperature of the hot air is reduced after passing through the drying channel, and the hot air is directly discharged after passing through the drying channel, so that the heat is directly wasted, and thus an improvement is needed.

SUMMERY OF THE UTILITY MODEL

In order to improve the extravagant problem of hot-blast heat, this application provides a heating device for drying furnace cellar for storing things.

The application provides a heating device for drying furnace cellar for storing things adopts following technical scheme:

the utility model provides a heating device for drying furnace cellar for storing things, includes main combustion chamber and air return chamber, the gas outlet and the stoving passageway intercommunication of main combustion chamber, the both ends of air return chamber communicate with the air inlet and the stoving passageway of main combustion chamber respectively, main combustion chamber is used for producing hot-blastly, the air return chamber is used for taking out the hot-blastly in the stoving passageway and burns in the combustion chamber.

Through adopting above-mentioned technical scheme, the hot-blast direct entering stoving passageway that the combustion chamber produced, thereby reach the effect of drying to the work piece of carrying in the stoving passageway, hot-blast temperature can decline gradually in the stoving passageway, and when the hot-blast position that moves to return air room and stoving passageway intercommunication in the stoving passageway, this part hot-blast can be carried into combustion chamber once more by the return air room, because this part hot-blast still has certain temperature, consequently, can rise to best stoving temperature soon after getting into combustion chamber, thereby realize the hot-blast effective utilization in the stoving passageway, effectively reduce the waste of heat.

Preferably, the main combustion chamber includes main heat exchange chamber and biological particle combustion apparatus, the air inlet and the gas outlet of main heat exchange chamber communicate with air return chamber and stoving passageway respectively, biological particle combustion apparatus installs in main heat exchange chamber, just biological particle combustion apparatus's gas outlet stretches out outside the main heat exchange chamber and with main heat exchange chamber sealing connection.

Through adopting above-mentioned technical scheme, biological granule burner can produce a large amount of heats when burning biological granule for be in high temperature environment in the main heat exchange chamber, when the return air room is in with hot-blast transport main heat exchange chamber, hot-blast and the hot-blast contact in the main heat exchange chamber can take place to mix, the heat exchange, thereby make hot-blast temperature promote fast, can take away a large amount of heats in the main heat exchange chamber simultaneously, avoid main heat exchange chamber high temperature.

Preferably, the main combustion chamber further comprises a feeding device arranged outside the main heat exchange chamber, the feeding device comprises a hopper and a spiral feeding device, the lower end of the hopper is communicated with the feed inlet of the biological particle combustion device, and the spiral feeding device is arranged at the lower end of the hopper.

Through adopting above-mentioned technical scheme, utilize spiral feed arrangement can control hopper ration unloading for the heat that biological granule burner produced is controllable.

Preferably, the air return chamber comprises an auxiliary heat exchange chamber and a heat exchange tube, the heat exchange tube is arranged in the auxiliary heat exchange chamber and communicated with the air outlet of the biological particle combustion device, and two ends of the auxiliary heat exchange chamber are respectively communicated with the main heat exchange chamber and the drying channel.

Through adopting above-mentioned technical scheme, biological granule burner can produce a large amount of high temperature smoke and dust when burning biological granule, utilizes the heat exchange tube to discharge high temperature smoke and dust, when hot-blast being taken into vice heat exchange chamber in the stoving passageway, hot-blast can take place heat exchange with the heat exchange tube in vice heat exchange chamber to make hot-blast can preheat, further improve the thermal application to biological granule burner production.

Preferably, the heat exchange tubes are arranged side by side, and one end of each heat exchange tube, which is far away from the main heat exchange chamber, extends out of the auxiliary heat exchange chamber.

Through adopting above-mentioned technical scheme, through setting up the heat exchange tube into many, can be hot-blast heat transfer effect in vice heat exchange chamber.

Preferably, each heat exchange tube is arranged as a coil.

By adopting the technical scheme, the surface area of the coil type heat exchange tube is large, and the stroke of high-temperature flue gas can be increased, so that the heat exchange effect of hot air in the auxiliary heat exchange chamber is further improved.

Preferably, one end of the auxiliary heat exchange chamber, which is far away from the main heat exchange chamber, is provided with a tail gas treatment device, and one end of the heat exchange tube, which is far away from the main heat exchange chamber, is communicated with the tail gas treatment device.

Through adopting above-mentioned technical scheme, utilize tail gas treatment facility can filter, purify the flue gas behind the make full use of, avoid producing the pollution to the surrounding environment.

Preferably, still include the second exhaust fan, the air intake and the heat exchange tube intercommunication of second exhaust fan, the air outlet and the tail gas treatment device intercommunication of second exhaust fan.

Through adopting above-mentioned technical scheme, utilize the second exhaust fan can introduce the high temperature flue gas that biological particle burner produced in the heat exchange tube to in introducing the tail gas treatment facility with the flue gas that has already been heat transfer to completion in the heat exchange tube.

Preferably, one end of the auxiliary heat exchange chamber, which is far away from the main heat exchange chamber, is provided with a first exhaust fan, and an air inlet of the first exhaust fan is communicated with the drying channel.

Through adopting above-mentioned technical scheme, when utilizing first exhaust fan can introduce the hot-blast vice heat exchange indoor in the stoving passageway to make the atmospheric pressure increase in the vice heat exchange indoor, thereby make the hot-blast main heat exchange indoor that can be bloated into by the hot-blast main heat exchange indoor, and make the hot-blast stoving passageway that can be bloated into in the main heat exchange indoor.

Preferably, the main air chamber and the air return chamber are both attached to one side of the drying channel.

By adopting the technical scheme, the main combustion chamber and the air return chamber can directly heat the drying channel, and the utilization rate of heat is further increased.

In summary, the present application includes at least one of the following beneficial technical effects:

the hot air in the drying channel can be recovered and reused, so that the utilization of heat is effectively improved, and the energy waste is reduced;

the high-temperature flue gas generated by the biological particle combustion device can exchange heat with hot air pumped into the air return chamber, so that the utilization rate of heat generated by the biological particle combustion device is further improved;

the main combustion chamber and the air return chamber are arranged in a manner of being attached to the drying channel, so that the main combustion chamber and the air return chamber can directly heat the drying channel, and the utilization rate of heat is further increased;

simple structure, low cost, difficult waste gas generation and no pollution to the surrounding environment.

Drawings

FIG. 1 is a top view of a related art drying oven pit;

FIG. 2 is a top view of a drying oven according to an embodiment of the present application;

FIG. 3 is a schematic top plan view of a drying tunnel according to an embodiment of the present invention;

FIG. 4 is a schematic front plan view of a drying tunnel according to an embodiment of the present invention;

FIG. 5 is an enlarged view of part A of FIG. 3;

FIG. 6 is a schematic top plan view of a heating apparatus according to an embodiment of the present application;

FIG. 7 is a schematic front plan view of a heating apparatus according to an embodiment of the present application;

FIG. 8 is a schematic view illustrating a heating apparatus and a drying tunnel according to an embodiment of the present invention;

FIG. 9 is a schematic front plan view of a second drying tunnel according to an embodiment of the present invention;

FIG. 10 is a schematic top plan view of a third drying tunnel according to an embodiment of the present invention;

FIG. 11 is a schematic front plan view of a fourth drying tunnel according to an embodiment of the present application;

FIG. 12 is a schematic front plan view of a fifth drying tunnel according to an embodiment of the present invention;

fig. 13 is a schematic top plan view of a six drying tunnel according to an embodiment of the present application.

Reference numerals: 1. a drying channel; 11. a channel body; 12. a blast chamber; 121. mounting a plate; 122. a side plate; 123. a first exhaust port; 13. a first suction fan; 14. a partition plate; 141. a second air outlet; 15. a hot air chamber; 16. a drying chamber; 17. a second suction fan; 18. an auxiliary channel; 181. a communicating groove; 182. a third air outlet; 183. a cover plate; 19. a third suction fan; 2. a heating device; 21. a main combustion chamber; 211. a main heat exchange chamber; 212. a bio-particle combustion device; 213. a feeding device; 214. a frame; 215. a hopper; 216. a screw feeder; 22. an air return chamber; 221. a secondary heat exchange chamber; 222. a heat exchange pipe; 223. a first exhaust fan; 23. tail gas treatment equipment; 231. a second exhaust fan.

Detailed Description

The present application is described in further detail below with reference to figures 1-13.

Example 1:

the embodiment of the application discloses a drying furnace cellar. Referring to fig. 2, the drying kiln comprises a drying channel 1 and a heat supply device 2, wherein openings are formed in two ends of the drying channel 1, a workpiece can move in the drying channel 1, an air outlet of the heat supply device 2 is communicated with the drying channel 1, and hot air can be supplied to the drying channel 1 by the heat supply device 2.

Referring to fig. 3 and 4, the drying tunnel 1 includes a tunnel body 11, a blast chamber 12, and a first suction fan 13; the channel body 11 is used for covering a workpiece, and simultaneously preventing hot air conveyed by the heat supply device 2 from directly escaping, the blowing chamber 12 is provided with a plurality of blowing chambers 12, the blowing chambers 12 are uniformly distributed on the left side and the right side of the channel body 11, each blowing chamber 12 is communicated with the air outlet of the heat supply device 2 and used for concentrating the hot air at the position where the blowing chamber 12 is arranged on the channel body 11, the first suction fan 13 is provided with a plurality of suction fans, the first suction fans 13 are uniformly distributed on the blowing chambers 12, and the first suction fans 13 are used for extracting the hot air in the blowing chamber 12 and blowing the hot air into the channel body 11.

Referring to fig. 3 and 4, a partition 14 is disposed in the duct body 11, the partition 14 extends along the length direction of the duct body 11, the duct body 11 is divided into a hot air chamber 15 and a drying chamber 16 by the partition 14, and the hot air chamber 15 and the drying chamber 16 are disposed in an up-down position; wherein, the two ends of the hot air chamber 15 are closed, and the hot air chamber 15 is communicated with the air outlet of the heating device 2, the hot air chamber 15 is also respectively communicated with each blast chamber 12, and the air outlet of the first suction fan 13 is communicated with the drying chamber 16.

Referring to fig. 4 and 5, the blowing chamber 12 includes a mounting plate 121 and a side plate 122, the mounting plate 121 is provided with one piece, the mounting plate 121 is parallel to the side surface of the drying chamber 16, the side plate 122 is provided with two pieces, the two pieces of side plate 122 are respectively provided on the left and right sides of the mounting plate 121, one side of the two pieces of side plate 122 away from the mounting plate 121 is connected to the side wall of the drying chamber 16, the blowing chamber 12 is formed by enclosing the mounting plate 121, the side plate 122 and the side wall of the drying chamber 16, and the upper end of the blowing chamber 12 is communicated with.

The blowing chamber 12 is disposed in the hot air chamber 15, the upper end of the blowing chamber 12 is connected to the lower surface of the partition 14, a plurality of first exhaust ports 123 are disposed on the mounting plate 121, and the first suction fans 13 are disposed on the first exhaust ports 123.

Referring to fig. 6 and 7, the heating apparatus 2 includes a main combustion chamber 21 and an air return chamber 22, and the main combustion chamber 21 and the air return chamber 22 are both disposed on a side surface of the drying chamber 16 such that the main combustion chamber 21 and the air return chamber 22 can directly heat air in the drying chamber 16; wherein, the air inlet of the main combustion chamber 21 is communicated with one end of the air return chamber 22, the air outlet of the main combustion chamber 21 is communicated with the heating chamber, and the end of the air return chamber 22 far away from the main combustion chamber 21 is communicated with the drying chamber 16.

Referring to fig. 7 and 8, the main combustion chamber 21 comprises a main heat exchange chamber 211, a biological particle combustion device 212 and a feeding device 213, the biological particle combustion device 212 is arranged in the main heat exchange chamber 211, a feed port of the biological particle combustion device 212 extends out of the main heat exchange chamber 211 and is connected with the feeding device 213, an air outlet of the biological particle combustion device 212 extends out of the main heat exchange chamber 211 and is connected with the main heat exchange chamber 211 in a sealing way, and the air return chamber 22 is communicated with the main heat exchange chamber 211; when the biological particle combustion device is used, the air flow which is cooled in the drying chamber 16 is pumped into the main heat exchange chamber 211 again by using the air return chamber 22, at the moment, the part of the air flow can exchange heat with the biological particle combustion device 212, so that the temperature of the air flow is increased, the air flow can be continuously conveyed into the hot air chamber 15 for use after the temperature of the air flow is increased, and meanwhile, a certain cooling effect can be achieved on the biological particle combustion device 212.

Referring to fig. 8, the air return chamber 22 comprises an auxiliary heat exchange chamber 221 and a heat exchange pipe 222, the heat exchange pipe 222 is provided as a coil, a plurality of heat exchange pipes 222 are provided, the heat exchange pipe 222 is provided in the auxiliary heat exchange chamber 221, one end of the heat exchange pipe 222 is communicated with the air outlet of the biological particle combustion device 212, and the other end of the heat exchange pipe 222 extends out of one end of the auxiliary heat exchange chamber 221 away from the main combustion chamber 21; wherein, one end of the auxiliary heat exchange chamber 221 is communicated with the main heat exchange chamber 211, the other end of the auxiliary heat exchange chamber 221 is communicated with the drying chamber 16, a first exhaust fan 223 is arranged at the position where the auxiliary heat exchange chamber 221 is communicated with the drying chamber 16, and the air inlet of the first exhaust fan 223 is communicated with the hot air chamber 15. During the use, utilize first exhaust fan 223 with the air current in the drying chamber 16 in the air return chamber 22 of drawing, at this moment, the produced flue gas of biological particle burner 212 can be discharged through heat exchange tube 222 to make the air current in the vice heat exchange chamber 221 can carry out the heat transfer with heat exchange tube 222, the air current that preliminary heat transfer was accomplished can get into and carries out the secondary heat transfer in the heat exchange chamber, thereby effectively ensure the make full use of the produced heat of biological particle burner 212.

Referring to fig. 8, the heating apparatus 2 further comprises a tail gas treatment device 23, the tail gas treatment device 23 is disposed at an end of the air return chamber 22 away from the main combustion chamber 21, and an air inlet of the tail gas treatment device 23 is communicated with an end of the heat exchange pipe 222 away from the biological particle combustion apparatus 212; wherein, each heat exchange tube 222 is provided with a second exhaust fan 231 on one end communicated with the tail gas treatment device 23, and the second exhaust fan 231 can be used for pumping the flue gas generated by the combustion of the biological particle combustion device 212 into the tail gas treatment device 23.

Referring to fig. 7, the feeding device 213 includes a frame 214, a hopper 215, and a screw feeding device 216, the hopper 215 is disposed in the frame 214, an upper end of the hopper 215 is open, a lower end of the hopper 215 is communicated with the feeding port of the bio-particle combustion device 212, and the screw feeding device 216 is disposed at a lower end of the hopper 215 for controlling the feeding amount.

The implementation principle of the embodiment 1 of the application is as follows:

the workpiece is conveyed into the drying chamber 16 by a hanging conveyor, a belt conveyor or a cart, a large amount of heat can be generated by the biological particle combustion device 212, meanwhile, high-temperature flue gas generated by the biological particle combustion device 212 can enter the air return chamber 22 and is finally exhausted by the tail gas treatment equipment 23, at the moment, air in the drying chamber 16 can be pumped into the air return chamber 22 by the air return chamber 22, the air pumped into the air return chamber 22 is contacted with the heat exchange tube 222 for conveying the high-temperature flue gas to generate heat exchange, so that the effect of primarily heating the air in the air return chamber 22 is achieved, the air in the air return chamber 22 can return into the main heat exchange chamber 211 under the action of air pressure, and the part of the air is contacted with the biological particle combustion device 212 to generate secondary heating, so that the effect of generating hot air is achieved.

The hot air generated by the heating device 2 directly enters the hot air chamber 15, then the hot air is divided into the blast chambers 12 through the hot air chamber 15, and finally the hot air is blown into the drying chamber 16 through the first suction fans 13 to heat the workpieces conveyed in the drying chamber 16.

Wherein, the work piece in the drying chamber 16 can produce steam when drying, and steam and the air mixture in the drying chamber 16 form the hot-blast of high temperature and high humidity, through the primary heating of return air chamber 22, through the secondary heating of main combustion chamber 21 again, because radiation temperature is very high in the main combustion chamber 21, can gasify the hot-blast steam of high temperature and high humidity in the twinkling of an eye to produce clean hot-blast, reentrant drying chamber 16 in, consequently and the circulation.

Example 2:

referring to fig. 9, the present embodiment is different from embodiment 1 in that the blowing chambers 12 are arranged in pairs in one group, two blowing chambers 12 in the same group are respectively arranged on two opposite sides of the drying chamber 16, and the first suction fans 13 on the two blowing chambers 12 in the same group are arranged in a staggered manner along the length direction of the blowing chambers 12.

The implementation principle of the embodiment 2 is as follows:

when the hot air in the blast chamber 12 is blown out by the first suction fan 13, because the first suction fans 13 on the two blast chambers 12 which are symmetrically arranged are staggered, the opposite blowing of the suction fans on the two blast chambers 12 which are symmetrically arranged can be avoided, the generation of dust is avoided, the application of hot air potential energy is ensured, the drying effect of the workpiece is effectively ensured, and meanwhile, the installation quantity of the first suction fans 13 can be reduced on the premise of ensuring the comprehensive blowing of the workpiece.

Example 3:

referring to fig. 10, the present embodiment is different from embodiment 1 in that the blowing chambers 12 are arranged in pairs in one group, two blowing chambers 12 in the same group are respectively arranged on two opposite sides of the drying chamber 16, and two blowing chambers 12 in the same group are arranged in a staggered manner along the length direction of the drying chamber 16.

The implementation principle of the embodiment 3 is as follows:

when the hot air in the blowing chamber 12 is blown out by the first suction fan 13, because the blowing chambers 12 arranged on the drying chamber 16 are staggered, the opposite blowing of the suction fans respectively arranged on the blowing chambers 12 can be avoided, dust generation is avoided, the application of hot air potential energy is ensured, the drying effect of the workpiece is effectively ensured, and meanwhile, the installation number of the first suction fans 13 can be reduced on the premise of ensuring the comprehensive blowing of the workpiece.

Example 4:

referring to fig. 11, the present embodiment is different from embodiment 1 in that a plurality of second air outlets 141 are further disposed on the partition 14, each second air outlet 141 is arranged along the length direction of the partition 14, each second air outlet 141 is provided with a second suction fan 17, and an air outlet of each second suction fan 17 is communicated with the drying chamber 16.

The implementation principle of the embodiment 4 is as follows:

the hot air in the hot air chamber 15 can be directly blown into the drying chamber 16 by the second suction fan 17 to blow the upper side of the workpiece, so that the workpiece is more easily dried.

Example 5:

referring to fig. 12, the present embodiment is different from embodiment 1 in that a plurality of auxiliary channels 18 are further disposed outside the channel body 11, one end of each auxiliary channel 18 is communicated with the air outlet of the heating device 2, and the other end of each auxiliary channel 18 is communicated with the bottom of the drying chamber 16; one end of the auxiliary channel 18, which is communicated with the drying chamber 16, is provided with a third air outlet 182, each third air outlet 182 is arranged along the length direction of the drying chamber 16, and each third air outlet 182 is provided with a third exhaust fan 19, an air outlet of which is communicated with the inside of the drying chamber 16.

Wherein, a plurality of communicating grooves 181 are provided on the bottom surface of the bottom of the channel body 11, a cover plate 183 is provided on each communicating groove 181, and the auxiliary channel 18 is formed by the surrounding of the communicating grooves 181 and the cover plate 183.

The implementation principle of the embodiment 5 is as follows:

the hot air generated by the heating apparatus 2 can be drawn into the auxiliary passage 18 by the third suction fan 19, and the hot air drawn into the auxiliary passage 18 can be blown into the drying chamber 16, thereby blowing the lower side of the workpiece, so that the workpiece can be dried more easily.

Example 6:

referring to fig. 13, the present embodiment is different from embodiment 1 in that each blast chamber 12 is disposed outside the drying chamber 16, each first exhaust fan 223 is disposed on the sidewall of the drying chamber 16, and the upper end of each blast chamber 12 is disposed to communicate with the side of the hot air chamber 15.

The implementation principle of the embodiment 6 is as follows:

by providing the blast chamber 12 outside the drying chamber 16, the blast chamber 12 can be prevented from occupying too much inner space of the drying chamber 16, so that the drying kiln can accommodate larger workpieces.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. The utility model provides a heating device for drying furnace cellar for storing things which characterized in that: including main combustion chamber (21) and return air chamber (22), the gas outlet and the stoving passageway (1) intercommunication of main combustion chamber (21), the both ends of return air chamber (22) communicate with the air inlet and the stoving passageway (1) of main combustion chamber (21) respectively, main combustion chamber (21) are used for producing hot-blastly, return air chamber (22) are used for taking out the hot-blastly in the stoving passageway (1) and carry out combustion chamber (21) in.

2. A heat supply apparatus for a drying kiln according to claim 1, characterised in that: the main combustion chamber (21) comprises a main heat exchange chamber (211) and a biological particle combustion device (212), wherein the air inlet and the air outlet of the main heat exchange chamber (211) are respectively communicated with the air return chamber (22) and the drying channel (1), the biological particle combustion device (212) is installed in the main heat exchange chamber (211), and the air outlet of the biological particle combustion device (212) extends out of the main heat exchange chamber (211) and is hermetically connected with the main heat exchange chamber (211).

3. A heat supply apparatus for a drying kiln according to claim 2, characterised in that: the main combustion chamber (21) further comprises a feeding device (213) arranged outside the main heat exchange chamber (211), the feeding device (213) comprises a hopper (215) and a spiral feeding device (216), the lower end of the hopper (215) is communicated with the feeding hole of the biological particle combustion device (212), and the spiral feeding device (216) is arranged on the lower end of the hopper (215).

4. A heat supply apparatus for a drying kiln according to claim 2, characterised in that: the air return chamber (22) comprises an auxiliary heat exchange chamber (221) and a heat exchange tube (222), the heat exchange tube (222) is arranged in the auxiliary heat exchange chamber (221), the heat exchange tube (222) is communicated with an air outlet of the biological particle combustion device (212), and two ends of the auxiliary heat exchange chamber (221) are respectively communicated with the main heat exchange chamber (211) and the drying channel (1).

5. A heating installation for a drying kiln according to claim 4, characterised in that: the heat exchange tubes (222) are arranged side by side, and one end of each heat exchange tube (222) far away from the main heat exchange chamber (211) extends out of the auxiliary heat exchange chamber (221).

6. A heating installation for a drying kiln according to claim 4, characterised in that: each heat exchange tube (222) is arranged as a coil.

7. A heating installation for a drying kiln according to claim 4, characterised in that: one end of the auxiliary heat exchange chamber (221), which is far away from the main heat exchange chamber (211), is provided with tail gas treatment equipment (23), and one end of the heat exchange tube (222), which is far away from the main heat exchange chamber (211), is communicated with the tail gas treatment equipment (23).

8. A heat supply apparatus for a drying kiln according to claim 7, characterised in that: still include second exhaust fan (231), the air intake and heat exchange tube (222) intercommunication of second exhaust fan (231), the air outlet and the tail gas treatment device (23) intercommunication of second exhaust fan (231).

9. A heating installation for a drying kiln according to claim 4, characterised in that: one end of the auxiliary heat exchange chamber (221), which is far away from the main heat exchange chamber (211), is provided with a first exhaust fan (223), and an air inlet of the first exhaust fan (223) is communicated with the drying channel (1).

10. A heat supply apparatus for a drying kiln according to claim 1, characterised in that: the main combustion chamber (21) and the air return chamber (22) are both attached to one side of the drying channel (1).

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