CN219955659U - High-efficiency energy-saving large hot-blast stove - Google Patents

Abstract

The utility model provides a high-efficiency energy-saving large-sized hot blast stove, which comprises a stove body, wherein a stove seat is arranged at the bottom of the stove body, and a hearth is coaxially arranged in the stove body at intervals; the side wall of the furnace body is provided with a hot air output pipe and a furnace mouth; the inner end of the furnace mouth is sealed and extends into the hearth; an external heating air duct, an upper flue gas channel and an internal heating air duct are sequentially distributed in the upper chamber from outside to inside; the upper flue gas channel is communicated with the top of the hearth, the outlet of the external heating air channel is communicated with the internal heating air channel, and the inner end of the hot air output pipe extends into the internal heating air channel in a sealing way; the inner cavity of the furnace seat is a lower cavity, and the side wall of the furnace seat is provided with a smoke outlet pipe and an air inlet pipe; an air inlet channel is arranged in the furnace seat, and an outlet of the air inlet channel is communicated with the hearth. The utility model has higher air outlet temperature, meets the requirement of large air quantity heating and meets the requirement of large-batch tea drying.

Description

High-efficiency energy-saving large hot-blast stove

Technical Field

The utility model relates to the technical field of tea drying equipment, in particular to a high-efficiency energy-saving large hot blast stove.

Background

The common tea dryer is to blow the formed tea by heating air into hot air by using a hot air furnace, and dry the tea into tea, and the common dryer hot air furnace is an in-line hot air furnace;

FIG. 9 shows a hot blast stove, which has only one heat exchange layer, has short heating time of air in the stove, not only causes low heating efficiency, but also is difficult to heat hot air to a higher temperature, the temperature of the hot air is quickly reduced after the hot air passes through a plurality of layers of tea leaves in an oven, and the hot air can not be dried any more, so that the stove is determined to be only used for a small dryer, the temperature of hot air is generally difficult to reach more than 120 ℃, and if the temperature of the hot air is increased by more than 120 ℃ to adapt to the large-displacement operation of a large dryer, the hot blast stove is not practical due to the defects of huge appearance, unfavorable transportation and installation of equipment, large occupied factory building space and the like;

in summary, there is a need for a large hot blast stove that improves the heating efficiency.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a high-efficiency energy-saving large hot blast stove, which solves the problems in the background art.

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

the large-scale high-efficiency energy-saving hot blast stove comprises a stove body, wherein a stove seat is arranged at the bottom of the stove body, and a hearth is coaxially arranged in the stove body at intervals; the side wall of the furnace body is provided with a hot air output pipe and a furnace mouth; the inner end of the furnace mouth is sealed and extends into the hearth;

an external heating air duct, an upper flue gas channel and an internal heating air duct are sequentially distributed in the upper chamber from outside to inside; the upper flue gas channel is communicated with the top of the hearth, the outlet of the external heating air channel is communicated with the internal heating air channel, and the inner end of the hot air output pipe extends into the internal heating air channel in a sealing way;

the inner cavity of the furnace seat is a lower cavity, and the side wall of the furnace seat is provided with a smoke outlet pipe and an air inlet pipe; an air inlet cavity is formed in the furnace seat, and an outlet of the air inlet cavity is communicated with the hearth; the inside of the lower chamber is sequentially provided with an outer air inlet channel, a lower smoke channel and an inner air inlet channel from outside to inside; the outlet of the air inlet pipe is communicated with the inner air inlet channel, and the outlet of the inner air inlet channel is communicated with the outer air inlet channel; the top end of the outer air inlet channel is communicated with the outer heating air channel; the top end of the lower smoke channel is communicated with the upper smoke channel, and the inner end of the smoke outlet pipe extends into the lower smoke channel in a sealing way.

Further, the outlet of the external heating air duct is positioned at the top end of the internal heating air duct, and the outlet of the external heating air duct is positioned at the top of the internal heating air duct.

Further, the inside of interior heating wind channel is from outside to inside in proper order first heating chamber, wind-guiding ring cover, second heating chamber, and ventilation mesh has evenly been laid to the inside of wind-guiding ring cover, and the bottom in first heating chamber is enclosed construction, and the top in first heating chamber, second heating chamber all communicates with the external heating wind channel, and the bottom in second heating chamber communicates with hot-blast output tube.

Further, the width of the second heating cavity is larger than that of the first heating cavity.

Further, the side wall of the top end of the hearth is provided with smoke guide pipes distributed in an annular array, and the smoke guide pipes extend into the upper smoke channel in a sealing manner.

Further, a separation plate is arranged at the bottom end of the interior of the furnace body, a first diversion hole and a second diversion hole are formed in the separation plate, the first diversion hole and the second diversion hole are distributed in an annular mode, the first diversion hole is located at the outer side of the second diversion hole, and the first diversion hole is a medium for communicating an external air inlet channel with an external heating air channel; the second diversion hole is a medium for communicating the lower flue gas channel with the upper flue gas channel.

Further, the air inlet cavity comprises a central part and side parts, wherein the central part is round and relatively communicated with the bottom end of the hearth, and the side parts are rectangular and penetrate through the hearth.

Further, the air inlet pipe is tangentially arranged on the side wall of the furnace seat, and the air blower is assembled and installed at the inlet of the air inlet pipe.

Further, a smoke exhausting fan is arranged at the outlet of the smoke outlet pipe.

The utility model provides a high-efficiency energy-saving large hot blast stove. Compared with the prior art, the method has the following beneficial effects:

1. the flue gas discharged from the furnace is not directly discharged into the atmosphere, but firstly enters the upper flue gas channel, then enters the lower flue gas channel and finally is discharged; therefore, the air entering from the outer air inlet channel and the inner air inlet channel can exchange heat with the lower flue gas channel to realize primary heating of the air, the preheated air flows upwards into the outer heating air channel, the air is secondarily heated by the outer wall of the upper flue gas channel, finally enters the inner heating air channel and is doubly heated by the inner wall of the upper flue gas channel and the outer wall of the hearth to realize tertiary heating; therefore, the flue gas waste heat can be utilized repeatedly, and air can be heated repeatedly, so that the air outlet temperature is higher, the requirement of large-air-quantity heating is met, and the requirement of large-batch tea drying is met; the heat efficiency is about 17% higher than that of the direct-discharge hot blast stove, and the energy is saved by about 13%.

2. The traditional large-sized air furnace has larger volume, the hearth is accommodated in the furnace body, and the air inlet cavity of the hearth is integrated in the furnace seat, so that the overall height of the furnace is greatly reduced, and the furnace has a compact structure; the hot blast stove structure with the same heat supply quantity is more compact, the transportation is convenient, the occupied space is reduced while the transportation cost is saved, the requirement on the production place is lower, and the adaptability is wider.

3. When the air in the first heating cavity and the second heating cavity flows downwards, the air in the second heating cavity can pass through the air guide ring cover to enter the first heating cavity, and the air in the first heating cavity can also pass through the air guide ring cover to enter the second heating cavity, so that left and right movement turbulence is realized, the descending speed is slowed down, and the heating time of hot air is increased;

4. the flue gas in the flue is always sucked out of the smoke pipe by the smoke sucking fan and is in a negative pressure state, and the hot air is blown into the furnace by the blower and is in a positive pressure state, so that even if slight welding defects exist in the upper flue gas channel and the lower flue gas channel, the condition that the flue gas enters the hot air can not occur, and the quality of tea leaves can not be influenced by the pollution of the hot air.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 shows a schematic diagram of the front structure of the stove of the present utility model;

FIG. 2 shows a schematic view of the back side structure of the stove according to the utility model;

FIG. 3 shows a schematic view of the internal cross-section of the stove of the present utility model;

FIG. 4 shows a schematic top view of a cross-sectional view of the divider plate of the present utility model;

FIG. 5 shows a schematic top view cross-sectional structure of the oven seat of the present utility model;

FIG. 6 shows a schematic structural diagram of the baffle plate flow guiding principle of the present utility model;

FIG. 7 shows a schematic diagram of the hot air, flue gas flow principle of the present utility model;

FIG. 8 shows a schematic diagram of the assembly structure of the hot blast stove and the tea dryer of the utility model;

FIG. 9 shows a schematic diagram of a stove construction in the background art;

the figure shows: 1. a furnace body; 11. a hot air output pipe; 12. an external heating air duct; 13. a smoke channel; 14. an internal heating air duct; 141. a first heating chamber; 142. an air guide ring cover; 143. a second heating chamber; 2. a furnace seat; 21. an air inlet pipe; 22. a smoke outlet pipe; 23. an air inlet cavity; 24. an inner air inlet channel; 25. a lower flue gas channel; 26. an outer air inlet channel; 3. a furnace mouth; 4. a furnace; 41. a smoke guide pipe; 5. a partition plate; 51. a first deflector aperture; 52. a second deflector aperture; 6. a blower; 7. a smoke exhausting fan; 8. tea dryer.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions in the embodiments of the present utility model are clearly and completely described, and it is obvious that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

In order to solve the technical problems in the background technology, a high-efficiency energy-saving large hot blast stove is provided as follows:

the utility model provides a high-efficiency energy-saving large-sized hot blast stove, which is shown in the figures 1-8, and comprises a stove body 1, wherein a stove seat 2 is arranged at the bottom of the stove body 1, and a hearth 4 is coaxially arranged in the stove body 1 at intervals; the side wall of the furnace body 1 is provided with a hot air output pipe 11 and a furnace mouth 3; the inner end of the furnace mouth 3 extends into the hearth 4 in a sealing way;

an external heating air duct 12, an upper flue gas channel 13 and an internal heating air duct 14 are sequentially distributed in the upper chamber from outside to inside between the furnace body 1 and the furnace chamber 4; the upper flue gas channel 13 is communicated with the top of the hearth 4, the outlet of the external heating air channel 12 is communicated with the internal heating air channel 14, and the inner end of the hot air output pipe 11 extends into the internal heating air channel 14 in a sealing manner;

the inner cavity of the furnace seat 2 is a lower cavity, and the side wall of the furnace seat 2 is provided with a smoke outlet pipe 22 and an air inlet pipe 21; an air inlet cavity 23 is formed in the furnace seat 2, and an outlet of the air inlet cavity 23 is communicated with the hearth 4; the interior of the lower chamber is sequentially provided with an outer air inlet channel 26, a lower smoke channel 25 and an inner air inlet channel 24 from outside to inside; the outlet of the air inlet pipe 21 is communicated with an inner air inlet channel 24, and the outlet of the inner air inlet channel 24 is communicated with an outer air inlet channel 26; the top end of the outer air inlet channel 26 is communicated with the external heating air channel 12; the top end of the lower smoke channel 25 is communicated with the upper smoke channel 13, and the inner end of the smoke outlet tube 22 extends into the lower smoke channel 25 in a sealing way.

The technical scheme has the following technical effects:

1. the flue gas discharged from the furnace is not directly discharged into the atmosphere, but enters the upper flue gas channel 13, then enters the lower flue gas channel 25, and finally is discharged; so, the air entering from the outer air inlet channel 26 and the inner air inlet channel 24 can exchange heat with the lower flue gas channel 25 to realize primary heating of the air, the preheated air flows upwards into the outer heating air channel 12, the air is secondarily heated by the outer wall of the upper flue gas channel 13, finally, the air enters into the inner heating air channel 14 and is doubly heated by the inner wall of the upper flue gas channel 13 and the outer wall of the hearth 4 to realize tertiary heating; therefore, the flue gas waste heat can be utilized repeatedly, and air can be heated repeatedly, so that the air outlet temperature is higher, the requirement of large-air-quantity heating is met, and the requirement of large-batch tea drying is met; the heat efficiency is about 17% higher than that of the direct-discharge hot blast stove, and the energy is saved by about 13%.

2. The hearth 4 is arranged in the furnace body 1, and the air inlet cavity 23 of the hearth 4 is integrated in the furnace seat 2, so that the overall height of the furnace is greatly reduced, and the furnace is compact in structure; the hot blast stove structure with the same heat supply quantity is more compact, the transportation is convenient, the occupied space is reduced while the transportation cost is saved, the requirement on the production place is lower, and the adaptability is wider.

In this embodiment, the outlet of the external heating air duct 12 is located at the top end thereof, and the outlet of the external heating air duct 12 is located at the top end of the internal heating air duct 14.

In this embodiment, the air intake chamber 23 includes a central portion and a side portion, the central portion is circular and is relatively connected to the bottom end of the furnace chamber 4, and the side portion is rectangular and penetrates through the furnace seat 2. By adopting the design, the air inlet channel can realize that air can enter from the side part of the stove seat 2, so that an air inlet structure is not required to be independently arranged.

In this embodiment, the side wall of the top end of the furnace chamber 4 is provided with smoke guiding tubes 41 distributed in an annular array, and the smoke guiding tubes 41 extend into the upper smoke channel 13 in a sealing manner. The annularly distributed smoke guide pipes 41 can be evenly output into the upper smoke channel 13, so that rapid smoke guide is realized.

Example two

On the basis of the above embodiment, the present embodiment further provides the following:

in this embodiment, the inside of the inner heating air duct 14 is sequentially provided with a first heating cavity 141, an air guiding ring cover 142 and a second heating cavity 143 from outside to inside, ventilation meshes are uniformly distributed in the air guiding ring cover 142, the bottom end of the first heating cavity 141 is a closed structure, the top ends of the first heating cavity 141 and the second heating cavity 143 are all communicated with the outer heating air duct 12, and the bottom end of the second heating cavity 143 is communicated with the hot air output pipe 11.

In this embodiment, the width of the second heating chamber 143 is greater than the width of the first heating chamber 141.

The technical scheme has the following effects:

when the air in the first heating cavity 141 and the second heating cavity 143 flows downwards, the air in the second heating cavity 143 can pass through the air guide ring cover 142 to enter the first heating cavity 141, and the air in the first heating cavity 141 can also pass through the air guide ring cover 142 to enter the second heating cavity 143, so that left and right movement turbulence is realized, the descending speed is slowed down, and the heating time of hot air is increased;

the width of the second heating chamber 143 is larger, so that most of the hot air can be heated by the hearth 4, and the heating temperature is ensured.

Example III

As shown in fig. 4 to 6, on the basis of the above embodiment, the present embodiment further provides the following:

in this embodiment, the bottom end of the interior of the furnace body 1 is provided with a partition plate 5, a first diversion hole 51 and a second diversion hole 52 are provided in the partition plate 5, the first diversion hole 51 and the second diversion hole 52 are all distributed in a ring shape, the first diversion hole 51 is located at the outer side of the second diversion hole 52, and the first diversion hole 51 is a medium for communicating the external air inlet channel 26 with the external heating air channel 12; the second deflector hole 52 is a medium in which the lower flue gas channel 25 communicates with the upper flue gas channel 13.

Example IV

As shown in fig. 8, on the basis of the above embodiment, the present embodiment further gives the following:

in this embodiment, the air inlet pipe 21 is tangentially arranged on the side wall of the furnace seat 2, and the air blower 6 is assembled at the inlet of the air inlet pipe 21.

In this embodiment, a smoke exhaust fan 7 is installed at the outlet of the smoke outlet pipe 22.

As shown in fig. 7, wherein the C-labeled arrow indicates the furnace air inflow direction, the B-labeled arrow indicates the flue gas flow direction, and the a-labeled arrow indicates the hot air flow direction.

The technical scheme has the following technical effects:

the flue gas in the flue is always sucked out of the smoke tube 22 by the smoke suction fan 7 and is in a negative pressure state, and the hot air is blown into the furnace by the blower 6 and is in a positive pressure state, so that even if the upper flue gas channel 13 and the lower flue gas channel 25 have slight welding defects, the condition that the flue gas enters the hot air can not occur, and the quality of tea leaves can not be influenced by the pollution of the hot air.

The working principle and the using flow of the utility model are as follows:

external air enters the hearth 4 through the air inlet cavity 23, high-temperature smoke generated by winding of the hearth 4 flows upwards, is guided into the upper smoke channel 13 through the smoke guide pipe 41, then enters the lower smoke channel 25 through the second guide hole 52, and is finally output from the smoke outlet pipe 22 under the action of the smoke exhaust fan;

the blower 6 blows external cold air into the air inlet pipe 21, then the cold air firstly enters the inner air inlet channel 24 and then enters the outer air inlet channel 26, and air in the inner air inlet channel 24 and the outer air inlet channel 26 exchanges heat with the lower smoke channel 25 to realize primary heat exchange; then, the air in the outer air inlet channel 26 is led into the outer heating air channel 12 through the first air guide hole 51, the air is secondarily heated by the outer wall of the upper flue gas channel 13, finally, the air enters the first heating cavity 141 and the second heating cavity 143 in the inner heating air channel 14, the air in the second heating cavity 143 can pass through the air guide ring cover 142 and enter the first heating cavity 141, the air in the first heating cavity 141 can also pass through the air guide ring cover 142 and enter the second heating cavity 143, and finally, the heated air in the second heating cavity 143 is output to the tea dryer 8 through the hot air output pipe 11.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (9)

1. The utility model provides a large-scale hot-blast furnace of energy-efficient which characterized in that: comprises a furnace body (1), a furnace seat (2) is arranged at the bottom of the furnace body (1), and a hearth (4) is coaxially arranged in the furnace body (1) at intervals; the side wall of the furnace body (1) is provided with a hot air output pipe (11) and a furnace mouth (3); the inner end of the furnace mouth (3) extends into the furnace chamber (4) in a sealing way;

an external heating air duct (12), an upper flue gas channel (13) and an internal heating air duct (14) are sequentially distributed in the upper chamber from outside to inside between the furnace body (1) and the furnace chamber (4); the upper flue gas channel (13) is communicated with the top of the hearth (4), the outlet of the external heating air channel (12) is communicated with the internal heating air channel (14), and the inner end of the hot air output pipe (11) extends into the internal heating air channel (14) in a sealing way;

the inner cavity of the furnace seat (2) is a lower cavity, and the side wall of the furnace seat (2) is provided with a smoke outlet pipe (22) and an air inlet pipe (21); an air inlet cavity (23) is formed in the furnace seat (2), and an outlet of the air inlet cavity (23) is communicated with the hearth (4); the inside of the lower chamber is sequentially provided with an outer air inlet channel (26), a lower smoke channel (25) and an inner air inlet channel (24) from outside to inside; the outlet of the air inlet pipe (21) is communicated with an inner air inlet channel (24), and the outlet of the inner air inlet channel (24) is communicated with an outer air inlet channel (26); the top end of the outer air inlet channel (26) is communicated with the outer heating air channel (12); the top end of the lower smoke channel (25) is communicated with the upper smoke channel (13), and the inner end of the smoke outlet pipe (22) extends into the lower smoke channel (25) in a sealing way.

2. The energy efficient large scale hot blast stove according to claim 1, wherein: the outlet of the external heating air duct (12) is positioned at the top end of the external heating air duct, and the outlet of the external heating air duct (12) is positioned at the top end of the internal heating air duct (14).

3. The energy efficient large scale hot blast stove according to claim 1, wherein: the inside of interior heating wind channel (14) is from outside to inside in proper order first heating chamber (141), wind-guiding ring cover (142), second heating chamber (143), and ventilation mesh has evenly been laid to the inside of wind-guiding ring cover (142), and the bottom of first heating chamber (141) is enclosed construction, and the top of first heating chamber (141), second heating chamber (143) all communicates with external heating wind channel (12), and the bottom and the hot-blast output tube (11) of second heating chamber (143) communicate.

4. A high efficiency energy saving large scale hot blast stove according to claim 3, wherein: the width of the second heating cavity (143) is larger than the width of the first heating cavity (141).

5. The energy efficient large scale hot blast stove according to claim 1, wherein: the side wall of the top end of the hearth (4) is provided with smoke guide pipes (41) distributed in an annular array, and the smoke guide pipes (41) extend into the upper smoke channel (13) in a sealing mode.

6. The energy efficient large scale hot blast stove according to claim 1, wherein: the bottom end of the inside of the furnace body (1) is provided with a separation plate (5), a first guide hole (51) and a second guide hole (52) are formed in the separation plate (5), the first guide hole (51) and the second guide hole (52) are distributed in an annular mode, the first guide hole (51) is located on the outer side of the second guide hole (52), and the first guide hole (51) is a medium for communicating an outer air inlet channel (26) with an outer heating air channel (12); the second diversion hole (52) is a medium for communicating the lower flue gas channel (25) with the upper flue gas channel (13).

7. The energy efficient large scale hot blast stove according to claim 1, wherein: the air inlet cavity (23) comprises a central part and side parts, the central part is round and relatively communicated with the bottom end of the hearth (4), and the side parts are rectangular and penetrate through the hearth (2).

8. The energy efficient large scale hot blast stove according to claim 1, wherein: the air inlet pipe (21) is tangentially arranged on the side wall of the furnace seat (2), and the air blower (6) is assembled and installed at the inlet of the air inlet pipe (21).

9. The energy efficient large scale hot blast stove according to claim 1, wherein: and a smoke exhausting fan (7) is arranged at the outlet of the smoke outlet pipe (22).