CN214250133U

CN214250133U - Indirect heat exchange type gas hot-blast stove

Info

Publication number: CN214250133U
Application number: CN202120191546.5U
Authority: CN
Inventors: 陈铭超; 陈玉涛
Original assignee: Jinan Yuhong Thermal Energy Equipment Co ltd
Current assignee: Jinan Yuhong Thermal Energy Equipment Co ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2021-09-21
Anticipated expiration: 2031-01-21

Abstract

The utility model relates to an indirect heat transfer formula gas hot-blast furnace, belong to the technical field of gas hot-blast furnace, it includes the combustor, first barrel, flue gas circulation subassembly and heat exchange assemblies, the combustor communicates with the one end of first barrel, flue gas circulation subassembly sets up on first barrel, and communicate with first barrel, heat exchange assemblies includes time delay heat transfer portion and hot gas circulation portion, time delay heat transfer portion all sets up on first barrel with hot gas circulation portion, flue gas circulation subassembly and time delay heat transfer portion intercommunication, the one end intercommunication of time delay heat transfer portion has the air-blower, the other end communicates with hot gas circulation portion, the one end and the external world intercommunication of time delay heat transfer portion, can carry out the heat exchange between hot gas circulation portion and the flue gas circulation portion, hot gas circulation subassembly keeps away from the one end and the external world intercommunication of time delay heat transfer portion. Because the time-delay heat exchanging part is arranged, the heat exchanging time of the smoke and the cold air is prolonged, and the heat exchanging efficiency of the smoke and the cold air is improved.

Description

Indirect heat exchange type gas hot-blast stove

Technical Field

The application relates to the field of gas hot blast stoves, in particular to an indirect heat exchange type gas hot blast stove.

Background

The hot blast stove is a thermodynamic machine, is widely applied in China in the end of the 20 th century 70 s, and becomes an upgrading product of an electric heat source and a traditional steam power heat source in many industries.

The utility model discloses a chinese utility model that bulletin number is CN202470409U, published as 20121003 discloses a fuel gas hot-blast furnace, and it includes combustor, first layer steel sheet sleeve, second floor steel sheet sleeve, third layer steel sheet sleeve, fourth layer steel sheet sleeve, fifth layer steel sheet sleeve, air-blower and support. The fifth steel plate sleeve is positioned at the innermost layer of the furnace body to form a furnace pipe as a combustion chamber. Fins are welded on the air sides of the second layer steel plate sleeve, the third layer steel plate sleeve and the fifth layer steel plate sleeve to expand the heating area. An air channel is formed between the first layer of steel plate sleeve and the second layer of steel plate sleeve. And a flue gas channel is formed between the second layer of steel plate sleeve and the third layer of steel plate sleeve. The third layer of steel plate sleeve and the fifth layer of steel plate sleeve form an air channel, the fourth layer of steel plate sleeve divides the air channel into two air channels, and the air flow direction is changed. The air blower is positioned at the rear part of the furnace body and provides cold air to the air channel between the first layer of steel plate sleeve and the second layer of steel plate sleeve. The burner is positioned at the front part of the furnace body and sprays flame into the fifth-layer steel plate sleeve for combustion. A smoke outlet is formed in the first layer of steel plate, and a hot air outlet is formed in the fourth layer of steel plate sleeve. And flame formed by the fuel after being ignited by the burner is sprayed into the furnace formed by the fifth layer of steel plate sleeve to be fully combusted, and high-temperature flue gas generated by combustion enters a flue gas channel between the second layer of steel plate sleeve and the third layer of steel plate sleeve and is then discharged into the atmosphere through a flue gas outlet. Cold air is blown into an air channel between the first layer of steel plate sleeve and the second layer of steel plate sleeve through the air blower, then turns to the air channel entering the third layer of steel plate sleeve and the fourth layer of steel plate sleeve, then turns to the air channel entering the fourth layer of steel plate sleeve and the fifth layer of steel plate sleeve, and is discharged from a hot air outlet to enter subsequent drying equipment.

In view of the above-mentioned related art, the inventor believes that since the cool air is discharged from the hot air outlet through the tertiary air passage, the time for heat exchange between the cool air and the flue gas is relatively short, thereby making the efficiency of the heat exchange low.

SUMMERY OF THE UTILITY MODEL

In order to prolong the heat exchange time between cold air and the flue gas to improve the heat exchange efficiency of flue gas and cold air, this application provides an indirect heat exchange formula gas hot-blast furnace.

The application provides a pair of indirect heat transfer formula gas hot-blast furnace adopts following technical scheme:

the utility model provides an indirect heat transfer formula gas hot-blast furnace, includes combustor, first barrel, flue gas circulation subassembly and heat exchange assemblies, the combustor communicates with the one end of first barrel, flue gas circulation subassembly sets up on first barrel to communicate with first barrel, heat exchange assemblies includes time delay heat transfer portion and hot gas circulation portion, time delay heat transfer portion and hot gas circulation portion all set up on first barrel, flue gas circulation subassembly and time delay heat transfer portion intercommunication, the one end intercommunication of time delay heat transfer portion has the air-blower, and the other end communicates with hot gas circulation portion, the one end and the external world intercommunication of time delay heat transfer portion, can carry out the heat exchange between hot gas circulation portion and the flue gas circulation subassembly, hot gas circulation portion keeps away from the one end and the external world intercommunication of time delay heat transfer portion.

Through adopting above-mentioned technical scheme, start the combustor, the combustor sprays flame to first barrel in, fully burn at first barrel inside, the flue gas of production passes through flue gas circulation subassembly and gets into the heat transfer portion of delaying, then arrange to the external world again, in the burning, the air-blower provides cold air in to the heat transfer portion of delaying, carry out the heat transfer with the flue gas in the heat transfer portion of delaying, then it carries out the heat transfer with flue gas circulation portion once more to get into hot gas circulation portion, arrange to the external world at last, owing to set up the heat transfer portion of delaying, the time of flue gas with cold air heat exchange has been prolonged, consequently, the heat exchange efficiency of flue gas and cold air has been improved.

Optionally, time delay heat transfer portion includes heat exchange tube and heat transfer casing, the heat transfer chamber has been seted up in the heat transfer casing, the heat exchange tube is fixed in the heat transfer intracavity along the axial of first barrel, the heat transfer casing sets up on first barrel outer wall, the one end intercommunication that the combustor was kept away from to the heat transfer casing has the intake pipe, intake pipe and air-blower export intercommunication, the one end intercommunication that the heat transfer casing is close to the intake pipe has the outlet duct, the one end intercommunication of flue gas circulation subassembly and heat exchange tube, the other end and the outlet duct intercommunication of heat exchange tube, steam circulation portion and heat transfer chamber intercommunication.

Through adopting above-mentioned technical scheme, in the flue gas passed through flue gas circulation subassembly entering heat exchange tube, then discharged from the outlet duct, the air-blower provides cold air to the heat transfer intracavity, and cold air flows through the outer wall of heat exchange tube, carries out the heat exchange with the flue gas in the heat exchange tube, then gets into hot gas flow portion that leads to.

Optionally, the flue gas circulation assembly comprises a fourth cylinder, a fifth cylinder, a connecting pipe, an annular flue gas transition box, a flue gas storage box and a flue gas outlet box, the fourth cylinder is coaxially sleeved outside the first cylinder, the first cylinder and the fourth cylinder are far away from one end of the burner, the fifth cylinder is coaxially sleeved outside the fourth cylinder, the fifth cylinder and the fourth cylinder are close to one end of the burner, a first annular flue is formed between the fourth cylinder and the fifth cylinder, a second annular flue is arranged in the flue gas transition box, a cavity is arranged in the flue gas storage box, the second annular flue is communicated with the cavity, the flue gas transition box is arranged at one end of the fourth cylinder close to the burner, the flue gas storage box is fixedly connected with the heat exchange shell, and the connecting pipe is fixed at one end of the fifth cylinder close to the burner, and one end and first ring flue intercommunication, the other end and second ring flue intercommunication, the one end of heat exchange tube and the cavity intercommunication in the flue gas bin, the through-hole has been seted up to the one end that the combustor was kept away from to first barrel, through-hole and first ring flue intercommunication, go out smoke box and heat transfer shell fixed connection to set up the cavity, the cavity intercommunication in outlet duct and the play smoke box, the heat exchange tube communicates with the cavity in the play smoke box.

Through adopting above-mentioned technical scheme, when flame fully burns in first barrel, the flue gas of production gets into first ring flue, then gets into in the second ring flue through the connecting pipe, then gets into in the heat transfer pipe through the flue gas bin, gets into out the smoke box at last, arranges to the external world from the outlet duct.

Optionally, the hot air flow portion includes a baffle, a circulation pipe, a second cylinder, a third cylinder and a sixth cylinder, the baffle is horizontally fixed in the heat exchange cavity and has a length smaller than that of the heat exchange shell, the baffle is disposed on one side of the heat exchange pipe away from the air blower, one end of the circulation pipe is communicated with one side of the heat exchange cavity away from the air blower, the sixth cylinder is coaxially sleeved outside the fifth cylinder, and has one end away from the burner communicated with the circulation pipe, the second cylinder is coaxially sleeved outside the first cylinder, and has one end away from the burner fixedly connected with one end of the fourth cylinder away from the burner, a first air channel is formed between the second cylinder and the first cylinder, a through hole is formed in the outer wall of the second cylinder, an annular first sealing plate is fixed at one end of the second cylinder close to the burner, and is abutted against the first cylinder, the air storage cavity communicated with the first air channel is defined by the first sealing plate and the first barrel, the first sealing plate is communicated with an air outlet pipe, an annular second sealing plate is fixed at one end, close to the first sealing plate, of the second barrel, one end, far away from the second barrel, of the second sealing plate is fixedly connected with one end, far away from the circulating pipe, of the sixth barrel, the third barrel is coaxially sleeved outside the second barrel, one end, close to the combustor, of the third barrel is fixedly connected with the second sealing plate, a second air channel is formed between the third barrel and the second barrel, a third air channel is formed between the third barrel and the fourth barrel, the second air channel is communicated with the third air channel, a fourth air channel is formed between the fifth barrel and the sixth barrel, and the fourth air channel is communicated with the third air channel.

Through adopting above-mentioned technical scheme, the air-blower provides the cold air to the heat transfer intracavity, and after the cold air carried out the heat transfer with the heat exchange tube, get into in the circulation pipe, then get into fourth air channel after, after passing through third air channel, second air channel and first air channel in proper order, accomplish with the heat transfer of flue gas after, get into in the air receiver, discharge from the air-out pipe to in getting into the subsequent handling, because communicate between the adjacent air channel, consequently also improve certain flexible space for the barrel thermal expansion.

Optionally, the outer walls of the first cylinder, the fourth cylinder and the fifth cylinder are all fixed with cooling fins.

Through adopting above-mentioned technical scheme, the purpose of setting up the fin is, enlarges the area of contact with the air to improve flue gas channel's radiating effect and the effect of the heat exchange of flue gas and cold air.

Optionally, the fifth cylinder and the sixth cylinder are both arranged in a circular truncated cone shape at ends far away from the burner.

Through adopting above-mentioned technical scheme, because fifth barrel and sixth barrel one end set to the round platform form, be convenient for arrange the fin to increase the quantity of fin, with the effect that improves the heat exchange.

Optionally, an annular guide plate is fixed at a joint of the first sealing plate and the second cylinder.

Through adopting above-mentioned technical scheme, the purpose that sets up the guide plate is, leads to the steam that gets into in the gas storage chamber for steam can be abundant contact with the fin on the first barrel, improves the heat transfer effect.

Optionally, a sealing ring is coaxially fixed at one end of the first cylinder, which is close to the burner, and the sealing ring is connected with the first sealing plate in a sealing and sliding manner.

Through adopting above-mentioned technical scheme, because the one end and the fourth barrel and the second barrel fixed connection of combustor are kept away from to first barrel, consequently first barrel receives the thermal energy after, can slide to the one end of keeping away from the runner pipe, consequently sets up the sealing washer so that when first barrel slided, reaches sealed effect.

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

1. the delayed heat exchange part is arranged for the purpose that when the combustion is carried out, the blower provides cold air into the delayed heat exchange part, the cold air exchanges heat with the smoke in the delayed heat exchange part, then enters the hot air circulation part to exchange heat with the smoke circulation part again, and finally is exhausted to the outside, so that the heat exchange time of the smoke and the cold air is prolonged, and the heat exchange efficiency of the smoke and the cold air is improved;

2. the purpose of arranging the radiating fins on the outer walls of the first cylinder, the fourth cylinder and the fifth cylinder is to enlarge the contact area with air, so that the radiating effect of the flue gas channel and the heat exchange effect of the flue gas and the cold air are improved;

3. the purpose of setting up annular guide plate is, leads to the steam that gets into in the gas storage chamber for steam can be abundant contact with the fin on the first barrel, improves the heat transfer effect.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a schematic sectional view of a hidden burner and a gas hot blast stove behind a blower.

Description of reference numerals: 100. a combustion engine; 110. a first cylinder; 200. a flue gas circulation assembly; 210. a fourth cylinder; 220. a fifth cylinder; 230. a first annular flue; 240. a connecting pipe; 250. a flue gas transition box; 260. a second annular flue; 270. a flue gas storage tank; 280. a heat sink; 300. a heat exchange assembly; 310. a time-delay heat exchanging part; 311. a heat exchange pipe; 312. a heat exchange housing; 313. a heat exchange cavity; 314. a baffle plate; 315. an air inlet pipe; 320. a blower; 330. a smoke outlet box; 331. an air outlet pipe; 340. a hot gas circulation part; 341. a flow-through tube; 342. a sixth cylinder; 343. a fourth air passage; 344. a second cylinder; 345. a first air passage; 346. a second seal plate; 347. a third cylinder; 348. a second air passage; 349. a third air passage; 350. a first seal plate; 351. an air outlet pipe; 352. a baffle; 353. and (5) sealing rings.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses an indirect heat exchange type gas hot blast stove.

Referring to fig. 1 and 2, the indirect heat exchange type gas hot blast stove includes a burner 100 and a first cylinder 110, one end of the first cylinder 110 is communicated with an outlet of the burner 100 through a flange, and the other end is provided with a through hole. The outer wall of the first cylinder 110 is provided with a flue gas circulation component 200 and a heat exchange component 300, one end of the flue gas circulation component 200 is communicated with the inside of the first cylinder 110, and the other end of the flue gas circulation component is communicated with the outside through the heat exchange component 300. The burner 100 emits flame into the first cylinder 110, the flame is sufficiently combusted in the first cylinder 110, and the flue gas generated by the combustion passes through the flue gas circulation assembly 200 and then is discharged to the outside through the heat exchange assembly 300.

Referring to fig. 2, the flue gas circulating assembly 200 includes a fourth cylinder 210 and a fifth cylinder 220, the fourth cylinder 210 is coaxially sleeved outside the first cylinder 110, and one end of the fourth cylinder 210, which is far away from the burner 100 (see fig. 1), is welded to one end of the first cylinder 110, which is far away from the burner 100, and a through hole is formed in the fourth cylinder 210. The fifth cylinder 220 is coaxially sleeved outside the fourth cylinder 210, and one end of the fifth cylinder 220 close to the burner 100 is welded to one end of the fourth cylinder 210 close to the burner 100. The first annular flue 230 is formed between the fourth cylinder 210 and the fifth cylinder 220. A connecting pipe 240 perpendicular to the axis is uniformly connected to one end of the fifth cylinder 220 close to the burner 100 along the circumferential direction. An annular flue gas transition box 250 is arranged on one side of the fourth cylinder 210 close to the burner 100, a second annular flue 260 is arranged in the flue gas transition box 250, and the connecting pipe 240 is communicated with the second annular flue 260. The flue gas transition box 250 is welded with a flue gas storage box 270, a cavity is formed in the flue gas storage box 270, the cavity is communicated with the second annular flue 260, and the cavity is communicated with the outside through the heat exchange assembly 300. The flue gas generated by the combustion enters the first annular flue 230, then enters the second annular flue 260 through the connecting pipe 240, and then is exhausted to the outside through the heat exchange assembly 300 through the flue gas storage tank 270.

In order to increase the heat dissipation of the first annular flue 230 and improve the heat exchange efficiency, the heat dissipation fins 280 are uniformly welded to the outer walls of the first cylinder 110, the fourth cylinder 210 and the fifth cylinder 220 along the circumferential direction and the axial direction thereof.

The heat exchange assembly 300 includes a time-delay heat exchange portion 310 and a blower fan 320 (see fig. 1), the time-delay heat exchange portion 310 includes a heat exchange pipe 311 and a heat exchange housing 312, and the heat exchange housing 312 is rectangular and is welded to the flue gas storage bin 270. A heat exchange cavity 313 is formed in the heat exchange shell 312, and a plurality of heat exchange tubes 311 are horizontally and uniformly arranged in the heat exchange cavity 313 through bolts. One end of each of the plurality of heat exchange tubes 311 is in communication with the cavity within the flue gas storage tank 270. An air inlet pipe 315 is communicated with one end of the heat exchange shell 312 far away from the smoke storage box 270, and an outlet of the blower 320 is communicated with the air inlet pipe 315. A smoke outlet box 330 is welded on one side wall of the heat exchange shell 312 far away from the smoke storage box 270, and a cavity is formed in the smoke outlet box 330. The smoke outlet box 330 is communicated with an air outlet pipe 331, and the air outlet pipe 331 is communicated with the outside. After the flue gas enters the heat exchange tube 311, the blower 320 provides cold air into the heat exchange cavity 313, the cold air exchanges heat with the heat exchange tube 311, and the flue gas enters the flue gas outlet box 330 and is discharged from the air outlet pipe 331.

A baffle 314 is horizontally welded in the heat exchange cavity 313, the length of the baffle 314 is smaller than that of the heat exchange shell 312, and the baffle 314 is positioned on the side of the heat exchange pipe 311 away from the blower 320. The heat exchange assembly 300 further comprises a hot air flow through part 340, the hot air flow through part 340 comprises a flow pipe 341 and a sixth cylinder 342, the sixth cylinder 342 is coaxially sleeved outside the fifth cylinder 220, and the flue gas transition box 250 is welded at one end of the sixth cylinder 342 close to the burner. One end of the sixth cylinder 342, which is far away from the burner, is communicated with the circulating pipe 341, and one end of the circulating pipe 341, which is far away from the sixth cylinder 342, is communicated with one side of the heat exchange cavity 313, which is far away from the blower 320. A fourth air passage 343 is formed between the sixth cylinder 342 and the fifth cylinder 220. The second cylinder 344 is coaxially sleeved outside the first cylinder 110, one end of the second cylinder, which is far away from the combustor 100, is welded to one end of the fourth cylinder 210, which is far away from the combustor, a first air channel 345 is formed between the second cylinder 344 and the first cylinder 110, and through holes are uniformly formed in the outer wall of the second cylinder 344 along the circumferential direction and the axial direction of the second cylinder 344. An annular second sealing plate 346 is welded to the outer wall of the second cylinder 344 at an end thereof adjacent to the burner 100, and an end of the second sealing plate 346 remote from the second cylinder 344 is welded to the sixth cylinder 342. The second cylinder 344 is coaxially sleeved with a third cylinder 347, one end of the third cylinder 347, which is close to the combustion engine 100, is welded to the second sealing plate 346, a second air channel 348 and a third air channel 349 are respectively formed between the third cylinder 347 and the second cylinder 344 as well as between the third cylinder 347 and the fourth cylinder 210, the first air channel 345 is communicated with the second air channel 348 through a through hole, and two ends of the third air channel 349 are respectively communicated with the second air channel 348 and the fourth air channel 343. After heat exchange of the heat exchange tube 311, cold air enters the fourth air channel 343 from the flow tube 341, then enters the second air channel 348 through the third air channel 349, then enters the first air channel 345 through the through hole, is discharged to the outside after heat exchange is completed, and enters a subsequent process.

In order to increase the number of the heat dissipation fins 280 and improve the heat exchange efficiency, the ends of the fifth cylinder 220 and the sixth cylinder 342 far away from the combustion engine 100 are truncated cone-shaped, so that the heat dissipation fins 280 can fully contact with the cold air.

An annular first sealing plate 350 is welded to one end of the second cylinder 344 close to the burner, and the first sealing plate 350 abuts against the first cylinder 110. An air reservoir is formed between the first sealing plate 350 and the first cylinder 110, and is in communication with the first air passage 345. The first sealing plate 350 is communicated with an air outlet pipe 351, and the air outlet pipe 351 is communicated with the outside. A guide plate 352 is welded at the joint of the first sealing plate 350 and the second cylinder 344, and the guide plate 352 is arranged obliquely downwards, so that gas entering the gas storage cavity can fully contact with the heat dissipation fins 280, and the heat exchange efficiency is improved.

Because the first cylinder 110 expands when heated, the sealing ring 353 is coaxially sleeved on the first cylinder 110, and the sealing ring 353 is connected with the first sealing plate 350 in a sealing and sliding manner.

The implementation principle of the indirect heat exchange type gas hot blast stove in the embodiment of the application is as follows: the burner 100 sprays flame into the first cylinder 110, the flame is fully combusted in the first cylinder 110, the generated flue gas enters the first annular flue 230, then enters the second annular flue 260 through the connecting pipe 240, then enters the heat exchange pipe 311 through the cavity of the flue gas storage tank 270, then enters the flue gas outlet box 330, and is discharged outside through the air outlet pipe 331;

then the blower 320 is started, the blower 320 provides cold air into the heat exchange cavity 313, the cold air exchanges heat with the heat exchange pipe 311, enters the fourth air channel 343 through the circulating pipe 341, then sequentially passes through the third air channel 349 and the second air channel 348, then enters the first air channel 345 through the through hole, exchanges heat with the heat dissipation fins 280 and the cylinder, finally enters the first sealing plate 350, and then is discharged to the next process through the air outlet pipe 351.

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

1. The utility model provides an indirect heat transfer formula gas hot-blast furnace which characterized in that: the heat exchange device comprises a burner (100), a first cylinder (110), a flue gas circulation component (200) and a heat exchange component (300), wherein the burner (100) is communicated with one end of the first cylinder (110), the flue gas circulation component (200) is arranged on the first cylinder (110) and is communicated with the first cylinder (110), the heat exchange component (300) comprises a delay heat exchange part (310) and a hot gas circulation part (340), the delay heat exchange part (310) and the hot gas circulation part (340) are both arranged on the first cylinder (110), the flue gas circulation component (200) is communicated with the delay heat exchange part (310), one end of the delay heat exchange part (310) is communicated with an air blower (320), the other end of the delay heat exchange part is communicated with the hot gas circulation part (340), one end of the delay heat exchange part (310) is communicated with the outside, and heat exchange can be carried out between the hot gas circulation part (340) and the flue gas circulation component (200), one end of the hot gas circulation part (340) far away from the delayed heat exchange part (310) is communicated with the outside.

2. The indirect heat exchange gas hot blast stove according to claim 1, characterized in that: the time-delay heat exchanging part (310) comprises a heat exchanging pipe (311) and a heat exchanging shell (312), a heat exchanging cavity (313) is formed in the heat exchanging shell (312), the heat exchanging pipe (311) is fixed in the heat exchanging cavity (313) along the axial direction of the first barrel (110), the heat exchanging shell (312) is arranged on the outer wall of the first barrel (110), an air inlet pipe (315) is communicated with one end, far away from the burner (100), of the heat exchanging shell (312), the air inlet pipe (315) is communicated with an outlet of the air blower (320), an air outlet pipe (331) is communicated with one end, close to the air inlet pipe (315), of the heat exchanging shell (312), a smoke circulating component (200) is communicated with one end of the heat exchanging pipe (311), the other end of the heat exchanging pipe (311) is communicated with the air outlet pipe (331), and a hot air circulating part (340) is communicated with the heat exchanging cavity (313).

3. An indirect heat exchange gas hot blast stove according to claim 2, characterized in that: the flue gas circulation assembly (200) comprises a fourth cylinder (210), a fifth cylinder (220), a connecting pipe (240), an annular flue gas transition box (250), a flue gas storage box (270) and a flue gas outlet box (330), wherein the fourth cylinder (210) is coaxially sleeved outside the first cylinder (110), one end of the first cylinder (110) and the fourth cylinder (210) are fixedly connected with each other and far away from the burner (100), the fifth cylinder (220) is coaxially sleeved outside the fourth cylinder (210), the fifth cylinder (220) and the fourth cylinder (210) are fixedly connected with each other and close to the burner (100), a first annular flue (230) is formed between the fourth cylinder (210) and the fifth cylinder (220), a second annular flue (260) is arranged in the flue gas transition box (250), cavities are arranged in the flue gas storage box (270), and the second annular flue (260) is communicated with the cavities, the flue gas transition box (250) is arranged at one end of the fourth cylinder (210) close to the combustor (100), the flue gas storage tank (270) is fixedly connected with the heat exchange shell (312), the connecting pipe (240) is fixed at one end of the fifth cylinder (220) close to the burner (100), and one end is communicated with the first annular flue (230) and the other end is communicated with the second annular flue (260), one end of the heat exchange pipe (311) is communicated with the cavity in the flue gas storage tank (270), one end of the first cylinder (110) far away from the burner (100) is provided with a through hole, the through hole is communicated with the first annular flue (230), the smoke outlet box (330) is fixedly connected with the heat exchange shell, the heat exchange tube (311) is communicated with the cavity in the smoke outlet box (330).

4. An indirect heat exchange gas hot blast stove according to claim 3, characterized in that: the hot gas circulation part (340) comprises a baffle plate (314), a circulation pipe (341), a second cylinder (344), a third cylinder (347) and a sixth cylinder (342), the baffle plate (314) is horizontally fixed in a heat exchange cavity (313), the length of the baffle plate is smaller than that of the heat exchange shell (312), the baffle plate (314) is arranged on one side of the heat exchange pipe (311) far away from the blower (320), one end of the circulation pipe (341) is communicated with one side of the heat exchange cavity (313) far away from the blower (320), the sixth cylinder (342) is coaxially sleeved outside the fifth cylinder (220), one end of the sixth cylinder far away from the burner (100) is communicated with the circulation pipe (341), the second cylinder (344) is coaxially sleeved outside the first cylinder (110), one end of the sixth cylinder far away from the burner (100) is fixedly connected with one end of the fourth cylinder (210) far away from the burner (100), and a first air channel (345) is formed between the second cylinder (344) and the first cylinder (110), the outer wall of the second cylinder (344) is provided with a through hole, one end of the second cylinder (344) close to the burner (100) is fixedly provided with an annular first sealing plate (350), the first sealing plate (350) is abutted against the first cylinder (110), the first sealing plate (350) and the first cylinder (110) enclose an air storage cavity communicated with a first air channel (345), the first sealing plate (350) is communicated with an air outlet pipe (351), one end of the second cylinder (344) close to the first sealing plate (350) is fixedly provided with an annular second sealing plate (346), one end of the second sealing plate (346) far away from the second cylinder (344) is fixedly connected with one end of the sixth cylinder (342) far away from the circulation pipe (341), the third cylinder (347) is coaxially sleeved outside the second cylinder (344), and one end of the third cylinder (347) close to the burner (100) is fixedly connected with the second sealing plate (346), a second air channel (348) is formed between the third cylinder (347) and the second cylinder (344), a third air channel (349) is formed between the third cylinder (347) and the fourth cylinder (210), the second air channel (348) is communicated with the third air channel (349), a fourth air channel (343) is formed between the fifth cylinder (220) and the sixth cylinder (342), and the fourth air channel (343) is communicated with the third air channel (349).

5. An indirect heat exchange gas hot blast stove according to any one of claims 3 to 4, characterised in that: and the outer walls of the first cylinder (110), the fourth cylinder (210) and the fifth cylinder (220) are all fixed with cooling fins (280).

6. An indirect heat exchange gas hot blast stove according to claim 4, characterized in that: one ends, far away from the combustor (100), of the fifth cylinder (220) and the sixth cylinder (342) are both arranged to be circular truncated cones.

7. An indirect heat exchange gas hot blast stove according to claim 4 or 6, characterized in that: an annular guide plate (352) is fixed at the joint of the first sealing plate (350) and the second cylinder (344).

8. An indirect heat exchange gas hot blast stove according to claim 7, characterized in that: a sealing ring (353) is coaxially fixed at one end, close to the combustor (100), of the first cylinder (110), and the sealing ring (353) is connected with the first sealing plate (350) in a sealing and sliding mode.