CN210197696U

CN210197696U - Split hot-blast stove

Info

Publication number: CN210197696U
Application number: CN201920782232.5U
Authority: CN
Inventors: Jiejun Wu; 吴杰俊; Yufeng He; 贺宇峰; Meng'ao Guo; 郭梦奥
Original assignee: WANHUA MACHINE CO Ltd CHANGSHA; Hunan Chenzhou Grain & Oil Machinery Co Ltd
Current assignee: WANHUA MACHINE CO Ltd CHANGSHA; Hunan Chenzhou Grain & Oil Machinery Co Ltd
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-03-27
Anticipated expiration: 2029-05-28

Abstract

The utility model discloses a split type hot-blast furnace, including combustor, post combustion furnace and flue gas heat transfer device, the flame nozzle of combustor and post combustion furnace's flame receiving port intercommunication, the exhanst gas outlet of post combustion furnace and flue gas heat transfer device's flue gas entry intercommunication are equipped with the intermediate layer that admits air in the oven of post combustion furnace, a furnace wall mounting forced draught blower, the air outlet of forced draught blower and the interbedded air inlet intercommunication of admitting air, and the intermediate layer that admits air passes through air intake and post combustion furnace's furnace intercommunication. The split hot blast stove has the advantages of small heat loss, high heat utilization rate, sufficient combustion of biomass particles, environmental protection, convenient adjustment of flue gas temperature, and no slagging of the granular fuel manufactured by burning various forestry and agricultural biomass leftover materials.

Description

Split hot-blast stove

Technical Field

The utility model relates to a hot-blast furnace technical field particularly, relates to a split type hot-blast furnace.

Background

At present, the heat exchanger of the hot-blast furnace commonly used in the market is mostly a tubular structure, and high temperature flue gas flows in the tubulation is inside, and the air flows in the tubulation outside, through the pipe wall of tubulation, passes to the air with the heat of high temperature flue gas.

In the hot blast stove of shell and tube heat exchanger, because the flue gas in the shell and tube and the temperature difference of the air outside the shell and tube are very big, can make to form very big difference in temperature stress between the heat transfer surface, lead to the expansion of heat transfer shell and tube sheet to draw and split easily, the maintenance degree of difficulty is big. In addition, the heat exchange area of the tubes in unit length is small, the heat exchange efficiency is low, so that the volume of the tube type hot air heat exchanger is large, the temperature of the discharged tail smoke is higher than 170 ℃, and a lot of heat energy is wasted.

Patent document CN 203464485U discloses a heat pipe type biomass hot-blast stove, which mainly comprises a combustion chamber and a heat exchange chamber, wherein the combustion chamber is communicated with the heat exchange chamber through a flue, the combustion chamber comprises a first hearth and a second hearth which are communicated with each other, a middle partition plate is arranged in the heat exchange chamber, and a plurality of heat pipes are arranged on the middle partition plate. The hot blast stove adopts the heat pipe as a heat exchange element, and solves the problems of easy expansion and tube plate drawing crack of the tube type heat exchanger to a certain extent; moreover, the second hearth is arranged on the hot blast stove, so that the length of a flue is prolonged, and biomass particles are combusted more fully.

However, the above-described hot blast stove also has the following major disadvantages: the normal temperature air supplemented into the first hearth is not preheated, the temperature is lower, particularly in the north of autumn and winter, the air temperature is lower than zero, the combustion efficiency of biomass particles is relatively low, and the combustion is not sufficient; a plurality of particles and sparks which are not burnt out still enter the flue gas heat exchange chamber; the uniform air effect of the second hearth is not large, the temperature difference of the flue gas entering each part of the flue gas channel at the lower end of the heat pipe is large, and the service life of the heat pipe with high temperature can be influenced. The temperature of the flue gas entering the heat exchange chamber, the temperature of the exhausted tail gas and the temperature of the clean air exhausted from the exhaust chamber are not regulated, so that the temperature of the flue gas is not regulated within the safe working temperature range of the heat pipe conveniently, and the temperature of the exhausted clean hot air is not regulated conveniently according to the use requirement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a split type hot-blast furnace to solve the hot-blast furnace living beings granule among the prior art at least burning insufficient, get into the flue gas temperature difference of each position of heat pipe lower extreme flue gas passageway big, the big problem of postcombustion furnace calorific loss.

In order to realize the above purpose, the utility model provides a split type hot-blast furnace, including combustor, post combustion furnace and flue gas heat transfer device, the flame nozzle of combustor and post combustion furnace's flame receiving port intercommunication, post combustion furnace's exhanst gas outlet and flue gas heat transfer device's flue gas entry intercommunication are equipped with the intermediate layer that admits air in the oven of post combustion furnace, and the air inlet of the intermediate layer that admits air communicates with the air outlet of a forced draught blower, and the intermediate layer that admits air passes through air intake and post combustion furnace's furnace intercommunication.

Further, the air intake includes: the first air inlet is arranged close to the upper edge of the flame receiving opening; the second air inlet is arranged close to the lower edge of the flame receiving opening; the third air inlet is arranged on the furnace wall of the secondary combustion furnace opposite to the flame nozzle; the first air inlet, the second air inlet and the third air inlet are communicated with a hearth of the secondary combustion furnace and the air inlet interlayer.

Furthermore, a slag discharge auger is rotatably arranged at the bottom of a hearth of the secondary combustion furnace, a rotating shaft of the slag discharge auger is a hollow shaft, a plurality of through holes are formed in the rotating shaft, an inner cavity of the rotating shaft is communicated with the hearth of the secondary combustion furnace through the through holes, and one end, extending out of the secondary combustion furnace, of the rotating shaft is connected with an air supply device.

Furthermore, a hollow auger shell is arranged on the periphery of the deslagging auger, the upper side of the hollow auger shell is connected with the bottom of the secondary combustion furnace through a connecting flange, a ventilation slot hole is formed in the connecting flange, the hollow auger shell is mutually communicated with the air inlet interlayer through the ventilation slot hole, and one end of the hollow auger shell is connected with an air supply device used for supplying air into the inner cavity of the hollow auger shell.

Furthermore, the flame nozzle of the burner and the periphery of the flame receiving port of the secondary combustion furnace are spaced to form an air supplementing port for air to enter.

Furthermore, the flue gas outlet is arranged at the upper part of the hearth of the secondary combustion furnace, an air-homogenizing channel is formed between the secondary combustion furnace and the flue gas heat exchange device at intervals, the flue gas outlet is communicated with the upper end of the air-homogenizing channel, and the flue gas inlet is communicated with the lower end of the air-homogenizing channel.

Furthermore, a plurality of upper flue gas uniform air plates are installed at the flue gas outlet, and a plurality of lower flue gas uniform air plates are installed at the flue gas inlet.

Furthermore, the flue gas outlet is provided with a plurality of upper flue gas uniform air plates with uniformly distributed and staggered through holes, the flue gas inlet is provided with a plurality of lower flue gas uniform air plates with uniformly distributed and staggered through holes, and the through holes can be circular or long waist holes or other shapes.

Furthermore, a heat insulation layer is arranged on the outer side of the air inlet interlayer on the furnace wall.

Further, the flue gas heat exchange device comprises a heat pipe heat exchange chamber, an intermediate baffle is arranged in the heat pipe heat exchange chamber along the horizontal direction, the intermediate baffle separates the inner cavity of the heat pipe heat exchange chamber into a flue gas heat exchange cavity located at the lower part and a clean air heat exchange cavity located at the upper part, a plurality of heat pipes are installed on the intermediate baffle along the vertical direction, the lower ends of the heat pipes stretch into the flue gas heat exchange cavity, the upper ends of the heat pipes stretch into the clean air heat exchange cavity, one end of the flue gas heat exchange cavity is communicated with the hearth of the secondary combustion furnace through a flue gas inlet, the other end of the flue gas heat exchange cavity is connected with a smoke exhaust fan through a flue gas air pipe, the clean air heat exchange cavity is provided with a clean air inlet at one end.

Furthermore, the number of the flue gas heat exchange cavities is two, the two flue gas heat exchange cavities are arranged side by side, the two flue gas heat exchange cavities are separated by a vertical flue gas partition plate, and the end parts of the two flue gas heat exchange cavities are mutually communicated to form a U-shaped flue gas channel; the clean air heat transfer chamber is two, and two clean air heat transfer chambers set up side by side, separate through a vertical clean air baffle between two clean air heat transfer chambers, and two clean air heat transfer chambers communicate the clean air passageway that forms the U type in the tip each other.

Further, split type hot-blast furnace still includes an automatically regulated temperature electric control unit, and automatically regulated temperature electric control unit includes: the smoke temperature measuring probe is arranged at the position, close to a smoke inlet, of the smoke heat exchange cavity and used for detecting the temperature of smoke entering the smoke heat exchange cavity from the secondary combustion furnace; the clean air temperature measuring probe is arranged at the position, close to the clean hot air outlet, of the clean air heat exchange cavity and used for detecting the temperature of the clean hot air subjected to heat exchange; the tail smoke temperature measuring probe is arranged at the position, close to a tail smoke outlet or a tail smoke pipe, of the smoke heat exchange cavity and is used for detecting the temperature of the discharged tail smoke; the smoke temperature measuring probe, the clean air temperature measuring probe, the tail smoke temperature measuring probe, the air feeder, the smoke exhaust fan, the slag discharge auger and the combustor are all connected with the temperature regulating controller.

Use the technical scheme of the utility model, through set up the intermediate layer that admits air in the oven of after-combustion furnace, the air inlet of this air inlet intermediate layer communicates with the air outlet of a forced draught blower, and the intermediate layer that admits air passes through air intake and after-combustion furnace's furnace intercommunication. When the split hot blast stove is used, normal temperature air is fed into the air inlet interlayer through the air feeder, flows in the air inlet interlayer and enters the hearth through the air inlet to be mixed with flue gas; on one hand, because the temperature in the hearth is high, the normal temperature air can cool the hearth when passing through the air inlet interlayer, so that the heat is reduced to be transmitted to the outer side of the furnace wall, the temperature of the outer side of the furnace wall is reduced to a safe temperature, and meanwhile, the air is preheated; the preheated air enters a secondary combustion furnace to supplement oxygen so that the unburned smoke and dust are fully combusted, the temperature of the air entering the hearth is relatively low, and the temperature of high-temperature smoke can be reduced; on the other hand, the normal temperature air flow supplemented from the air supplementing opening between the flame nozzle of the burner and the flame receiving opening of the secondary combustion furnace can be adjusted by adjusting the air quantity of the smoke exhaust fan, so that the temperature of the smoke entering the smoke heat exchange device is regulated and controlled within the safe working temperature range of the heat pipe, and the temperature of the tail smoke is controlled within 70 ℃. The split hot blast stove has the advantages of small heat loss, high heat utilization rate, sufficient biomass particle combustion and convenient adjustment of flue gas temperature.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of a split hot-blast stove of the embodiment of the present invention.

Fig. 2 is a schematic sectional view of a secondary combustion furnace of the split hot-blast stove of the embodiment of the present invention along the plane a-a in fig. 1.

Fig. 3 is a schematic structural diagram of the slag discharge auger and the hollow auger shell in the split hot blast furnace of the embodiment of the utility model.

Fig. 4 is a schematic view of the overlooking structure of the deslagging auger and the hollow auger shell in the split hot blast furnace of the embodiment of the utility model.

Fig. 5 is a left side view structure diagram of the deslagging auger and the hollow auger shell in the split hot blast furnace of the embodiment of the utility model.

Fig. 6 is a right side view structure diagram of the deslagging auger and the hollow auger shell in the split hot blast furnace of the embodiment of the utility model.

Fig. 7 is a schematic view of the structure of the hollow auger shell in the split hot blast stove according to the embodiment of the present invention.

Fig. 8 is a schematic view of the overlooking structure of the hollow auger shell in the split hot blast stove of the embodiment of the present invention.

Fig. 9 is a schematic diagram of a structure of a U-shaped flue gas channel in a split hot blast stove according to an embodiment of the present invention.

Fig. 10 is a schematic diagram of a U-shaped clean air channel in a split hot blast stove according to an embodiment of the present invention.

Fig. 11 is a schematic structural view of a split hot blast stove according to another embodiment of the present invention.

Fig. 12 is a schematic structural view of a split hot blast stove according to another embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a combustion engine; 11. a flame nozzle; 12. a temperature-regulating controller; 20. a secondary combustion furnace; 21. a flame receiving port; 22. a flue gas outlet; 23. a furnace wall; 24. an air inlet interlayer; 25. a blower; 26. a deslagging auger; 27. an air supply opening; 28. a hollow auger housing; 29. a connecting flange; 30. a flue gas heat exchange device; 31. a flue gas inlet; 40. a uniform air channel; 50. a smoke temperature measuring probe; 60. a clean air temperature probe; 70. a smoke exhaust fan; 80. a flue gas duct; 90. a cyclone dust collector; 221. an upper flue gas air homogenizing plate; 241. a first air inlet; 242. a second air inlet; 243. a third air inlet; 261. a rotating shaft; 291. a ventilation slot; 311. a lower flue gas air homogenizing plate; 321. a middle partition plate; 322. a flue gas heat exchange cavity; 323. a clean air heat exchange cavity; 324. a heat pipe; 325. a clean air inlet; 326. a clean hot air outlet; 327. a vertical flue gas baffle; 328. a vertical clean air baffle.

Detailed Description

To facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather the intention is merely to facilitate a distinction between corresponding parts. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.

Example 1

Referring to fig. 1 to 8, a split type hot blast stove of the embodiment of the present invention is mainly used for burning biomass particles, recovering the heat of flue gas generated by burning, forming clean hot air, and drying materials (such as grains) or using hot air for industry and life.

As shown in fig. 1 to 8, the split hot blast stove mainly comprises a burner 10, a secondary combustion furnace 20 and a flue gas heat exchange device 30. Wherein, the flame nozzle 11 of the burner 10 is communicated with the flame receiving port 21 of the secondary combustion furnace 20, and the flue gas outlet 22 of the secondary combustion furnace 20 is communicated with the flue gas inlet 31 of the flue gas heat exchange device 30. An air inlet interlayer 24 is arranged in a furnace wall 23 of the secondary combustion furnace 20, a blower 25 is arranged on the furnace wall 23, an air outlet of the blower 25 is communicated with an air inlet of the air inlet interlayer 24, and the air inlet interlayer 24 is communicated with a hearth of the secondary combustion furnace 20 through an air inlet.

The split hot-blast stove feeds normal-temperature air into the air inlet interlayer 24 through the air feeder 25, and the air flows in the air inlet interlayer 24 and enters the hearth through the air inlet to be mixed with flue gas. Due to the arrangement, on one hand, because the temperature in the hearth is high, the normal-temperature air can cool the hearth when passing through the air inlet interlayer 24, the heat is reduced and is transmitted to the outer side of the furnace wall 23, so that the temperature of the outer side of the furnace wall 23 is reduced to a safe temperature, and meanwhile, the air is preheated; on the other hand, the preheated air enters the secondary combustion furnace 20 to supplement oxygen to fully combust the unburned smoke and dust, the temperature of the air entering the hearth is relatively low, the temperature of high-temperature smoke can be reduced, and the temperature of the smoke entering the smoke heat exchange device 30 can be within the working temperature range of the heat pipe by adjusting the air supply quantity of the air supply blower 25. The split hot blast stove has the advantages of small heat loss, high heat utilization rate, sufficient biomass particle combustion and convenient adjustment of flue gas temperature.

Specifically, referring to fig. 1, in the present embodiment, the intake vent includes a first intake vent 241, a second intake vent 242, and a third intake vent 243. Wherein, the first air inlet 241 is arranged near the upper edge of the flame receiving port 21; the second air inlet 242 is disposed near the lower edge of the flame receiving opening 21; the third air inlet 243 is arranged on the furnace wall 23 of the secondary combustion furnace 20 opposite to the flame nozzle 11; and, the first air inlet 241, the second air inlet 242, and the third air inlet 243 communicate the furnace of the post-combustion furnace 20 with the air inlet plenum 24. The air is simultaneously introduced to the upper side of the flame nozzle 11 through the first air inlet 241, the lower side of the flame nozzle 11 through the second air inlet 242 and the opposite side of the flame nozzle 11 through the third air inlet 243, so that the air and the flue gas are mixed more uniformly, the combustion of biomass particles in the flue gas is more sufficient, and the temperature of the flue gas is more uniform.

Further, referring to fig. 1 to 8, in the present embodiment, a slag discharge auger 26 is rotatably installed at the bottom of the furnace chamber of the secondary combustion furnace 20, and the slag discharge auger 26 is mainly used for discharging slag deposited at the bottom of the secondary combustion furnace 20. The rotating shaft 261 of the slag discharging auger 26 is a hollow shaft, and the rotating shaft 261 is provided with a plurality of through holes, the through holes communicate the inner cavity of the rotating shaft 261 with the hearth of the secondary combustion furnace 20, and one end of the rotating shaft 261 extending out of the secondary combustion furnace 20 is connected with an air supply device (not shown in the figure). Air is introduced into the inner cavity of the rotary shaft 261 through the air supply device. The periphery of the deslagging auger 26 is a hollow auger shell 28, the upper side of the hollow auger shell 28 is connected with the bottom of the secondary combustion furnace 20 through a connecting flange 29, a ventilation slot 291 is formed on the connecting flange 29, the hollow auger shell 28 is mutually communicated with the air inlet interlayer 24 through the ventilation slot 291, and one end of the hollow auger shell 28 is connected with an air supply device for supplying air into the inner cavity of the hollow auger shell 28. Air is introduced into the inner cavity of the hollow auger shell 28 through the air supply device and is sent into the hearth after being preheated. The slag discharging auger 26 is arranged on the hollow auger shell 28 through a bearing, the slag discharging auger 26 is driven to rotate through a speed reducer and a chain wheel transmission mechanism, and the end part of the slag discharging auger 26 is connected with an air inlet hose. By the arrangement, the waste heat of the unburned slag accumulated above the slag discharge auger 26 can be fully utilized, the temperatures of the slag discharge auger 26 and the hollow auger shell 28 are reduced, air can be supplemented to the hearth, and the biomass small particles can be fully combusted.

Referring to fig. 1, in the present embodiment, the flame nozzle 11 of the burner is spaced apart from the circumference of the flame receiving opening 21 of the after-burning furnace 20 to form an air supply opening 27 for air to enter. Air can be fed into the hearth from the air supply port 27 to supply oxygen required by combustion of materials in the hearth, and the temperature of flue gas in the hearth is reduced.

Referring to fig. 1, in the present embodiment, the flue gas outlet 22 is disposed at the upper portion of the furnace chamber of the secondary combustion furnace 20, an air-uniformizing channel 40 is formed between the secondary combustion furnace 20 and the flue gas heat exchange device 30 at an interval, the flue gas outlet 22 is communicated with the upper end of the air-uniformizing channel 40, and the flue gas inlet 31 of the flue gas heat exchange device 30 is communicated with the lower end of the air-uniformizing channel 40. With the arrangement, the flue gas after mixed combustion in the hearth of the secondary combustion furnace 20 enters the air-homogenizing passage 40 through the flue gas outlet 22 and then enters the flue gas heat exchange device 30 through the flue gas inlet 31 downwards along the air-homogenizing passage 40, and through the structural arrangement, the flue gas can be more uniform and can be reduced to the temperature range suitable for the operation of the flue gas heat exchange device 30.

In order to further improve the uniformity of the flue gas, referring to fig. 1, in the present embodiment, a plurality of upper flue gas uniform air plates 221 are installed at the flue gas outlet 22, and a plurality of lower flue gas uniform air plates 311 are installed at the flue gas inlet 31. The upper flue gas uniform air plates 221 are arranged in parallel, obliquely and downwards along the advancing direction of the flue gas; the lower flue gas uniform air plates 311 are arranged in parallel and obliquely downwards along the advancing direction of the flue gas. When the flue gas passes through the upper flue gas uniform air plate 221 or the lower flue gas uniform air plate 311, the flue gas passes through the adjacent uniform air plates, so that the flue gas is more uniform. Furthermore, a plurality of upper flue gas uniform air plates 221 with uniformly distributed and staggered through holes are arranged at the flue gas outlet 22, and a plurality of lower flue gas uniform air plates 311 with uniformly distributed and staggered through holes are arranged at the flue gas inlet 31, wherein the through holes can be circular, long waist-shaped or other shapes.

In order to further reduce the heat loss, reduce the temperature outside the furnace wall 23 and improve the safety of the equipment, in this embodiment, the furnace wall 23 is further provided with a heat insulating layer (not shown) disposed outside the intake sandwich 24. Through the combination of the heat insulation layer and the air inlet interlayer 24, the heat loss of the secondary combustion furnace 20 is greatly reduced, the heat utilization rate is improved, and the use safety of the secondary combustion furnace 20 is improved. Specifically, an inner partition and an outer partition may be disposed outside the air intake interlayer 24, and an insulation cotton may be disposed between the inner partition and the outer partition, so as to form an insulation layer.

Specifically, referring to fig. 1, in the present embodiment, the flue gas heat exchange device 30 includes a heat pipe heat exchange chamber, and a middle partition 321 is horizontally disposed in the heat pipe heat exchange chamber, and the middle partition 321 divides an inner cavity of the heat pipe heat exchange chamber into a flue gas heat exchange cavity 322 located at a lower portion and a clean air heat exchange cavity 323 located at an upper portion; a plurality of heat pipes 324 are vertically installed on the middle partition 321, the lower ends of the heat pipes 324 extend into the flue gas heat exchange cavity 322, and the upper ends of the heat pipes 324 extend into the clean air heat exchange cavity 323. One end of the flue gas heat exchange cavity 322 is communicated with the hearth of the secondary combustion furnace 20 through a flue gas inlet 31; the other end of the flue gas heat exchange cavity 322 is connected to a smoke exhaust fan 70 through a flue gas duct 80.

In the above-mentioned flue gas heat exchange device 30, the clean air heat exchange cavity 323 is arranged at the upper part of the heat pipe heat exchange chamber, the flue gas heat exchange cavity 322 is arranged at the lower part of the heat pipe heat exchange chamber, and the plurality of heat pipes 324 are arranged on the middle partition 321; the middle temperature flue gas enters the flue gas heat exchange cavity 322 and heats the lower part of the heat pipe 324 and deforms freely, the working medium (working liquid) in the heat pipe 324 absorbs heat and evaporates and then flows to the upper end (in the clean air heat exchange cavity 323) of the heat pipe 324 quickly, the normal temperature clean air is heated by using the latent heat of the working medium steam to generate clean hot air, and the steam is condensed and falls into the lower part of the heat pipe 324 to circulate continuously. By adopting the heat pipe 324 for heat exchange, the problems that the heat exchange tube array is easy to expand at high temperature and the tube plate is cracked and the maintenance difficulty is high when the existing tube array heat exchanger is adopted are solved.

Further, referring to fig. 1, a clean air inlet 325 is disposed at one end of the clean air heat exchange cavity 323 close to the air outlet of the flue gas heat exchange cavity 322, and a clean hot air outlet 326 is disposed at the other end of the clean air heat exchange cavity 323. Thus, the flue gas and the clean air flow in opposite directions. Because along the advancing direction of flue gas, the temperature of heat pipe 324 in flue gas heat exchange cavity 322 reduces gradually, so set up, can make full use of heat, reduce tail gas temperature, reduce calorific loss.

In order to remove dust in the low-temperature tail gas after heat exchange, in this embodiment, the split hot blast stove further includes a cyclone dust collector 90, and an air inlet of the cyclone dust collector 90 is connected to an outlet end of the flue gas duct 80, and is used for removing dust from the low-temperature tail gas after heat exchange; a bag-type dust collector (not shown) is connected to the outlet of the cyclone dust collector 90 to further settle fine dust, so as to meet the environmental protection requirement and discharge the fine dust into the atmosphere.

Particularly, the utility model discloses in the combustor 10 that uses can adopt current ordinary living beings granule combustor or the living beings granule combustor that prevents the slagging-off. The common biomass particle combustion machine sprays high-temperature flue gas and flame, and carries a small amount of biomass small particles which are not burnt out. Only wooden particles can be used, while rice hull particles, straw particles, bamboo particles and bagasse particles can form slag to block a hearth. The anti-slagging biomass particle burner sprays high-temperature flue gas and flame, simultaneously discharges basically burnt slag, and is suitable for particle fuel manufactured by various forestry and agricultural biomass leftover materials.

Example 2

The utility model discloses another embodiment of split type hot-blast furnace, the major structure of the hot-blast furnace of this embodiment is the same with embodiment 1, and the main difference lies in flue gas heat transfer chamber 322 and clean air heat transfer chamber 323's structure difference. Referring to fig. 9 and 10, in this embodiment, in order to facilitate transportation and reduce the overall length of the device, two flue gas heat exchange cavities 322 of the split hot blast stove are provided, the two flue gas heat exchange cavities 322 are arranged side by side, the two flue gas heat exchange cavities 322 are separated by a vertical flue gas partition 327, and the end portions of the two flue gas heat exchange cavities 322 are communicated with each other to form a U-shaped flue gas channel; clean air heat transfer chamber 323 also is two, and two clean air heat transfer chambers 323 set up side by side, separate through a vertical clean air baffle 328 between two clean air heat transfer chambers 323, and two clean air heat transfer chambers 323 communicate each other in the tip and form the clean air passageway of U type.

So set up, can shorten its length through the width that increases flue gas heat transfer device 30, to some occasions (if need container transport) that have special requirement to place length, can use the flue gas heat transfer device 30 of this kind of form.

Example 3

The utility model discloses another embodiment of split type hot-blast furnace, the major structure of the hot-blast furnace of this embodiment is the same with embodiment 1 or embodiment 2, compares with embodiment 1 and embodiment 2, and the main difference of the split type hot-blast furnace of this embodiment lies in having increased the automatically regulated temperature controlling means.

Referring to fig. 1, in order to more conveniently regulate and control the flue gas temperature and the clean hot air temperature, the split hot air furnace further comprises an automatic temperature-regulating electric control device, and the automatic temperature-regulating electric control device comprises a flue gas temperature-measuring probe 50, a clean air temperature-measuring probe 60, a tail gas temperature-measuring probe (not shown in the figure) and a temperature-regulating controller 12. The flue gas temperature measuring probe 50 is installed at the position, close to the flue gas inlet 31, of the flue gas heat exchange cavity 322 and is used for detecting the temperature of the flue gas entering the flue gas heat exchange cavity 322 from the secondary combustion furnace 20; the clean air temperature measuring probe 60 is arranged at the position, close to the clean hot air outlet 326, of the clean air heat exchange cavity 323 and used for detecting the temperature of the clean hot air after heat exchange; the tail smoke temperature measuring probe is arranged at the position, close to a tail smoke outlet or a tail smoke pipe, of the smoke heat exchange cavity 322 and is used for detecting the temperature of the discharged tail smoke; the smoke temperature probe 50, the clean air temperature probe 60, the air feeder 25, the slag discharge auger 26, the burner 10, the smoke exhaust fan 70 and the tail smoke temperature probe are all connected with the temperature adjusting controller 12.

When the device is used, the upper limit temperature and the lower limit temperature of output clean air and the upper limit temperature of input smoke are set, and when the temperature of the clean air at the clean hot air outlet 326 rises to be close to the upper limit temperature, fuel feeding is reduced or stopped; when the temperature of the clean air is reduced to be close to the lower limit temperature, the fuel feeding is increased by adjusting the feeding amount of the burner 10, so that the temperature of the clean air is stabilized to be plus or minus 3 ℃ of the set value; when the flue gas temperature approaches the upper limit temperature, the fuel feeding is reduced or stopped, and meanwhile, the air volume of the smoke exhaust fan 70 is increased, the air volume of the normal temperature air is increased, and the flue gas temperature is reduced. The slag which is not completely combusted in the combustor 10 falls on the slag discharge auger 26, is accumulated and then continuously combusted, exerts waste heat, is subjected to linkage adjustment by the temperature adjustment controller 12, and is discharged discontinuously. The thermostat controller 12 may employ a PLC.

Application discovers that after the split hot blast stove is processed by the secondary combustion furnace 20, the high-temperature flame and the flue gas with the temperature of more than 1000 ℃ input by the burner 10 can be uniformly reduced to the temperature for safe use of the medium-temperature heat pipe 324, thereby ensuring the safe, high-efficiency and long-term operation of the heat pipe 324; unburned slag and small-particle fuel can be completely combusted in the secondary combustion furnace 20, waste heat is exerted, and the conversion rate of the fuel is improved; the low-temperature tail smoke output from the smoke heat exchange device 30 does not have sparks and has the temperature lower than 70 ℃, so that the safety and the economy of tail smoke emission are improved; the temperature of the outer surface of the furnace wall 23 of the secondary combustion furnace 20 can be controlled within a safe temperature, so that the secondary combustion furnace is safer and saves energy; the heat exchange efficiency of the split hot blast stove can reach more than 90%.

Example 4

Referring to fig. 11, another embodiment of the split hot blast stove of the present invention has the same main structure as that of embodiment 3, and the main difference is that the clean hot air outlet 326 is different. In this embodiment, the clean hot air outlet 326 is enlarged, and a part of the clean hot air outlet 326 is located above the after-burning furnace 20. Therefore, the output quantity of the hot air can be increased, and the hot air furnace is suitable for large hot air furnaces. In fig. 11, the structure of the rear end portion of the flue gas heat exchange chamber 322 and the blower 25 are not shown.

Example 5

Referring to fig. 12, another embodiment of the split-type hot-blast stove of the present invention has the same main structure as that of embodiment 4, and the main difference is that the upper flue gas uniform air plate 221 is a structure with a plurality of rows of through holes formed on the baffle, and the top plate of the post-combustion furnace 20, the partition between the post-combustion furnace 20 and the uniform air passage 40, and the partition between the clean hot air outlet 326 and the uniform air passage 40 are made into refractory plates. The hot blast stove of the embodiment can also increase the output quantity of hot blast, is suitable for large hot blast stoves, and has better fire resistance.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A split hot blast stove comprises a burner (10), a secondary combustion furnace (20) and a flue gas heat exchange device (30), wherein a flame nozzle (11) of the burner (10) is communicated with a flame receiving port (21) of the secondary combustion furnace (20), a flue gas outlet (22) of the secondary combustion furnace (20) is communicated with a flue gas inlet (31) of the flue gas heat exchange device (30),

an air inlet interlayer (24) is arranged in a furnace wall (23) of the secondary combustion furnace (20), an air inlet of the air inlet interlayer (24) is communicated with an air outlet of a blower (25), and the air inlet interlayer (24) is communicated with a hearth of the secondary combustion furnace (20) through an air inlet.

2. The split hot blast stove according to claim 1, wherein the air inlet comprises:

a first air inlet (241), wherein the first air inlet (241) is arranged close to the upper edge of the flame receiving opening (21);

the second air inlet (242), the said second air inlet (242) is close to the lower edge of the said flame receiving opening (21) and set up;

a third air inlet (243), wherein the third air inlet (243) is arranged on the furnace wall (23) of the secondary combustion furnace (20) opposite to the flame nozzle (11);

the first air inlet (241), the second air inlet (242) and the third air inlet (243) are used for communicating a hearth of the secondary combustion furnace (20) with the air inlet interlayer (24).

3. The split hot blast stove according to claim 1, wherein a slag discharging auger (26) is rotatably installed at the bottom of the hearth of the secondary combustion furnace (20), a rotating shaft (261) of the slag discharging auger (26) is a hollow shaft, a plurality of through holes are formed in the rotating shaft (261), the through holes communicate the inner cavity of the rotating shaft (261) with the hearth of the secondary combustion furnace (20), and one end of the rotating shaft (261) extending out of the secondary combustion furnace (20) is connected with an air supply device.

4. The split hot blast stove according to claim 3, wherein a hollow auger housing (28) is provided around the residue discharge auger (26), the upper side of the hollow auger housing (28) is connected to the bottom of the secondary combustion furnace (20) via a connecting flange (29), the connecting flange (29) is provided with a ventilation slot (291), the hollow auger housing (28) and the air inlet interlayer (24) are communicated with each other via the ventilation slot (291), and one end of the hollow auger housing (28) is connected to an air supply device for supplying air into the inner cavity of the hollow auger housing (28).

5. The split hot blast stove according to claim 1, wherein the flame nozzle (11) is spaced from the flame receiving opening (21) around the circumference thereof to form an air supply opening (27) for air to enter.

6. The split hot blast stove according to claim 1, wherein the flue gas outlet (22) is provided at an upper part of a hearth of the secondary combustion furnace (20), an air-homogenizing passage (40) is formed between the secondary combustion furnace (20) and the flue gas heat exchanging device (30) at an interval, the flue gas outlet (22) is communicated with an upper end of the air-homogenizing passage (40), and the flue gas inlet (31) is communicated with a lower end of the air-homogenizing passage (40).

7. The split hot blast stove according to claim 6, characterized in that a plurality of upper flue gas homogenizing plates (221) are installed at the flue gas outlet (22), and a plurality of lower flue gas homogenizing plates (311) are installed at the flue gas inlet (31); and a heat insulation layer is arranged on the furnace wall (23) and outside the air inlet interlayer (24).

8. The split hot blast stove according to claim 1, wherein the flue gas heat exchange device (30) comprises a heat pipe heat exchange chamber, a middle partition plate (321) is disposed in the heat pipe heat exchange chamber along a horizontal direction, the middle partition plate (321) divides an inner cavity of the heat pipe heat exchange chamber into a flue gas heat exchange chamber (322) located at a lower portion and a clean air heat exchange chamber (323) located at an upper portion, a plurality of heat pipes (324) are mounted on the middle partition plate (321) along a vertical direction, lower ends of the heat pipes (324) extend into the flue gas heat exchange chamber (322), upper ends of the heat pipes (324) extend into the clean air heat exchange chamber (323), one end of the flue gas heat exchange chamber (322) is communicated with a furnace cavity of the secondary combustion furnace (20) through the flue gas inlet (31), and the other end of the flue gas heat exchange chamber (322) is connected to a smoke exhaust fan (70) through a flue gas duct (80), and a clean air inlet (325) is formed in one end, close to the air outlet of the flue gas heat exchange cavity (322), of the clean air heat exchange cavity (323), and a clean hot air outlet (326) is formed in the other end of the clean air heat exchange cavity (323).

9. The split hot blast stove according to claim 8, wherein there are two flue gas heat exchange chambers (322), the two flue gas heat exchange chambers (322) are arranged side by side, the two flue gas heat exchange chambers (322) are separated by a vertical flue gas partition plate (327), and the two flue gas heat exchange chambers (322) are communicated with each other at the end to form a U-shaped flue gas channel; the two clean air heat exchange cavities (323) are arranged side by side, the two clean air heat exchange cavities (323) are separated by a vertical clean air partition plate (328), and the two clean air heat exchange cavities (323) are communicated with each other at the end parts to form a U-shaped clean air channel.

10. The split hot blast stove according to claim 8, further comprising an automatic temperature control device, the automatic temperature control device comprising:

the flue gas temperature measuring probe (50) is arranged at the position, close to the flue gas inlet (31), of the flue gas heat exchange cavity (322) and is used for detecting the temperature of the flue gas entering the flue gas heat exchange cavity (322) from the secondary combustion furnace (20);

the clean air temperature measuring probe (60) is arranged at the position, close to the clean hot air outlet (326), of the clean air heat exchange cavity (323) and used for detecting the temperature of the clean hot air after heat exchange;

the tail smoke temperature measuring probe is arranged at a position, close to a tail smoke outlet or a tail smoke pipe, of the smoke heat exchange cavity (322) and used for detecting the temperature of the discharged tail smoke;

the temperature-adjusting device comprises a temperature-adjusting controller (12), wherein the smoke temperature-measuring probe (50), the clean air temperature-measuring probe (60), the air feeder (25), the combustor (10), the smoke exhaust fan (70) and the tail smoke temperature-measuring probe are connected with the temperature-adjusting controller (12).