CN217356949U

CN217356949U - Air preheating device

Info

Publication number: CN217356949U
Application number: CN202221413247.2U
Authority: CN
Inventors: 邹华
Original assignee: Chongqing Yixiang Chemical Co ltd
Current assignee: Chongqing Yixiang Chemical Co ltd
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2022-09-02
Anticipated expiration: 2032-06-08

Abstract

The utility model discloses an air preheating device, including a preheating section of thick bamboo, a preheating section of thick bamboo is the cavity setting and has preheating chamber, the sealed closing plate that is equipped with in upper end of a preheating section of thick bamboo, the sealed hot air inlet box that is equipped with cavity setting of lower extreme of a preheating section of thick bamboo, the upper end fixed mounting of closing plate has the air inlet box that is cavity setting, the sealed air outlet box that is equipped with of lower extreme of hot air inlet box, preheating section of thick bamboo upper end is equipped with the hot air outlet duct that the intercommunication preheats the chamber, the hot air outlet duct runs through the closing plate, the lower extreme intercommunication that preheats the chamber has the hot air intake pipe, preheat the intracavity and be equipped with a plurality of preheating tubes, the upper end of preheating tube runs through the closing plate and communicates with the air inlet box, the lower extreme of preheating tube runs through the hot air inlet box and communicates with the air outlet box, preheat the intracavity and be equipped with a plurality of hot air pipes, hot air pipe lower extreme and hot air inlet box intercommunication. The utility model discloses can be better preheat the air, preheat effectually, heat energy conversion efficiency is high, and anticorrosive leak protection performance is good, and the security is strong.

Description

Air preheating device

Technical Field

The utility model relates to a indirect heating equipment technical field, concretely relates to air preheating device.

Background

The sulfur dioxide gas generated by the combustion of the sulfuric acid cracking furnace can preheat the air entering the sulfuric acid cracking furnace through the air preheater, so that the air is preheated to 400-700 ℃ and then enters the cracking furnace, the heat in the waste gas of the cracking furnace is fully utilized, and the fuel consumption of the cracking furnace is greatly reduced. In the prior art, a conventional air preheater has low heat energy conversion efficiency, poor preheating effect, no good corrosion resistance and leakage resistance and great potential safety hazard.

Therefore, in order to solve the above problems, an air preheating device with high heat energy conversion efficiency, good preheating effect, good corrosion and leakage resistance and strong safety is needed.

Disclosure of Invention

To the not enough of above-mentioned prior art, the utility model aims to solve the technical problem that: how to provide one kind can be better preheat the air, preheat effectually, heat energy conversion efficiency is high, and anticorrosive leak protection performance is good, the strong air preheating device of security.

In order to solve the technical problem, the utility model discloses a following technical scheme:

an air preheating device comprises a preheating cylinder, wherein the preheating cylinder is arranged in a hollow manner and is provided with a preheating cavity, the upper end of the preheating cylinder is provided with a sealing plate in a sealing manner, the lower end of the preheating cylinder is provided with a hot air inlet box in a sealing manner, the upper end of the sealing plate is fixedly provided with an air inlet box in a hollow manner, the lower end of the hot air inlet box is provided with an air outlet box in a sealing manner, the upper end of the preheating cylinder is provided with a hot air outlet pipe communicated with the preheating cavity, the hot air outlet pipe penetrates through the sealing plate and the air inlet box and is connected with the sealing plate and the air inlet box in a sealing manner, the lower end of the preheating cavity is communicated with a hot air inlet pipe, the hot air inlet pipe penetrates through the hot air inlet box and is connected with the air outlet box in a sealing manner, a plurality of preheating pipes are arranged in the preheating cavity, the upper ends of the preheating pipes penetrate through the sealing plate and are communicated with the air inlet box, the lower end of the preheating pipe penetrates through the hot gas inlet box and is communicated with the air outlet box, a plurality of hot gas pipes are arranged in the preheating cavity, and the lower ends of the hot gas pipes are communicated with the hot gas inlet box.

Like this, utilize the air inlet case will treat the air transport of heating to preheat intraductal, utilize steam intake pipe and steam inlet case to carry the pyrolysis furnace flue gas to preheating the intracavity and heat the air in the preheating pipe, the air of heating completion can be followed air and is gone out gas tank and locate to discharge, the pyrolysis furnace flue gas can be followed the steam outlet duct of top and discharged, utilize pyrolysis furnace flue gas from the bottom up and air from the top down to carry out the heat exchange in preheating the intracavity, can make the efficiency of heat exchange higher, the effect is also better, the sealed setting in each place, can prevent that the pyrolysis furnace flue gas from revealing, the security has been improved.

Furthermore, the air inlet box, the hot air inlet box and the air outlet box are respectively communicated with pipelines convenient for air to enter and exit. And the input or output of the gas of each part is facilitated through the pipeline.

Furthermore, the preheating pipe is arranged spirally, and the hot air pipe is arranged on the spiral central axis of the preheating pipe corresponding to the preheating pipe. Through the heliciform setting, make the air at the stroke grow that preheats the intracavity and flow, the time becomes long, can make the heating of air more abundant, has improved the efficiency of heat exchange, and the hot-air pipe setting can carry out the heat exchange to the air by the more efficient on the center axis of preheating tube.

Furthermore, a plurality of air holes are uniformly formed in the hot air pipe from top to bottom in the circumferential direction. The flue gas discharged from the cracking furnace through the air holes directly contacts with the preheating pipe, so that the air is heated more fully, and the efficiency is higher.

Furthermore, a baffle plate is fixedly arranged at the lower end of the preheating cavity through a support, and the baffle plate is arranged above the hot gas inlet pipe. The baffle plate is utilized to guide the flue gas of the cracking furnace, which is discharged into the preheating cavity by the hot gas inlet pipe, to the preheating pipe, so that the heat exchange efficiency is improved.

Further, the air inlet case with all be equipped with the mounting bracket on the air case of giving vent to anger, be equipped with through the mounting bracket with a section of thick bamboo of preheating the air inlet case with a sealed heat preservation section of thick bamboo including the sealed parcel of air case of giving vent to anger, the pipeline the steam outlet duct with the steam inlet pipe runs through a sealed heat preservation section of thick bamboo, and sealed setting. Through the sealed heat preservation section of thick bamboo that the external seal set up, can further prevent revealing of pyrolysis furnace flue gas, great improvement the security performance, can also play the heat preservation effect, reduce the calorific loss in the heat exchange, improve heat exchange efficiency.

To sum up, the utility model discloses can be better preheat the air, preheat effectually, heat energy conversion efficiency is high, and anticorrosive leak protection performance is good, and the security is strong.

Drawings

Fig. 1 is a schematic structural diagram of an air preheating device according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of fig. 1 with parts of components removed.

Fig. 3 is a schematic structural view of fig. 2 with a part of components removed.

Fig. 4 is a schematic view of the assembly of fig. 3 in another orientation with a portion of the assembly removed.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

In specific implementation, as shown in fig. 1-4, an air preheating device includes a preheating cylinder 1, the preheating cylinder is hollow and has a preheating chamber 2, the upper end of the preheating cylinder 1 is provided with a sealing plate 3 in a sealing manner, the lower end of the preheating cylinder 1 is provided with a hollow hot air inlet box 4 in a sealing manner, the upper end of the sealing plate 3 is fixedly provided with a hollow air inlet box 5, the lower end of the hot air inlet box 4 is provided with an air outlet box 6 in a sealing manner, the upper end of the preheating cylinder 1 is provided with a hot air outlet pipe 7 communicated with the preheating chamber 2, the hot air outlet pipe 7 penetrates through the sealing plate 3 and the air inlet box 5 and is connected with the sealing plate 3 and the air inlet box 5 in a sealing manner, the lower end of the preheating chamber 2 is communicated with a hot air inlet pipe 8, the hot air inlet pipe 8 penetrates through the hot air inlet box 4 and the air outlet box 6 and is connected in a sealing manner, the preheating device is characterized in that a plurality of preheating pipes 9 are arranged in the preheating cavity 2, the upper ends of the preheating pipes 9 penetrate through the sealing plate 3 and are communicated with the air inlet box 5, the lower ends of the preheating pipes 9 penetrate through the hot air inlet box 4 and are communicated with the air outlet box 6, a plurality of hot air pipes 10 are arranged in the preheating cavity 2, and the lower ends of the hot air pipes 10 are communicated with the hot air inlet box 4. Like this, utilize the air inlet case will treat the air transport of heating to preheat intraductal, utilize steam intake pipe and steam inlet case to carry the pyrolysis furnace flue gas to preheating the intracavity and heat the air in the preheating pipe, the air of heating completion can be followed air and is gone out gas tank and locate to discharge, the pyrolysis furnace flue gas can be followed the steam outlet duct of top and discharged, utilize pyrolysis furnace flue gas from the bottom up and air from the top down to carry out the heat exchange in preheating the intracavity, can make the efficiency of heat exchange higher, the effect is also better, the sealed setting in each place, can prevent that the pyrolysis furnace flue gas from revealing, the security has been improved.

In this embodiment, the air inlet box 5, the hot air inlet box 4 and the air outlet box 6 are respectively communicated with a pipeline 11 for facilitating air to enter and exit. And the input or output of the gas of each part is facilitated through the pipeline.

In this embodiment, the preheating pipe 9 is spirally disposed, and the hot air pipe 10 is disposed on a spiral central axis of the preheating pipe 9 corresponding to the preheating pipe 9. Through the heliciform setting, make the air at the stroke grow that preheats the intracavity and flow, the time becomes long, can make the heating of air more abundant, has improved the efficiency of heat exchange, and the hot-air pipe setting can carry out the heat exchange to the air by the more efficient on the center axis of preheating tube.

In this embodiment, the hot air pipe 10 is uniformly provided with a plurality of air holes 12 from top to bottom in the circumferential direction. The flue gas discharged from the cracking furnace through the air holes directly contacts with the preheating pipe, so that the air is heated more fully, and the efficiency is higher.

In this embodiment, a baffle plate 14 is fixedly installed at the lower end of the preheating chamber 2 through a support 13, and the baffle plate 14 is arranged above the hot gas inlet pipe 8. The baffle plate is utilized to guide the flue gas of the cracking furnace, which is discharged into the preheating cavity by the hot gas inlet pipe, to the preheating pipe, so that the heat exchange efficiency is improved.

In this embodiment, air inlet box 5 with all be equipped with mounting bracket 15 on the air case 6, be equipped with through mounting bracket 15 with a section of thick bamboo 1 of preheating the air inlet box 5 with a sealed heat preservation section of thick bamboo 16 including the sealed parcel of air case 6 that goes out, pipeline 11 hot air outlet pipe 7 with hot air inlet pipe 8 runs through a sealed heat preservation section of thick bamboo, and sealed setting. Through the sealed heat preservation section of thick bamboo that the external seal set up, can further prevent revealing of pyrolysis furnace flue gas, great improvement the security performance, can also play the heat preservation effect, reduce the calorific loss in the heat exchange, improve heat exchange efficiency.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. An air preheating device is characterized by comprising a preheating cylinder, wherein the preheating cylinder is arranged in a hollow manner and is provided with a preheating cavity, the upper end of the preheating cylinder is provided with a sealing plate in a sealing manner, the lower end of the preheating cylinder is provided with a hot air inlet box in a sealing manner, the upper end of the sealing plate is fixedly provided with the hollow air inlet box, the lower end of the hot air inlet box is provided with an air outlet box in a sealing manner, the upper end of the preheating cylinder is provided with a hot air outlet pipe communicated with the preheating cavity, the hot air outlet pipe penetrates through the sealing plate and the air inlet box and is connected with the sealing plate and the air inlet box in a sealing manner, the lower end of the preheating cavity is communicated with a hot air inlet pipe, the hot air inlet pipe penetrates through the hot air inlet box and the air outlet box and is connected in a sealing manner, a plurality of preheating pipes are arranged in the preheating cavity, and the upper ends of the preheating pipes penetrate through the sealing plate and are communicated with the air inlet box, the lower end of the preheating pipe penetrates through the hot gas inlet box and is communicated with the air outlet box, a plurality of hot gas pipes are arranged in the preheating cavity, and the lower ends of the hot gas pipes are communicated with the hot gas inlet box.

2. The air preheating device according to claim 1, wherein the air inlet box, the hot air inlet box and the air outlet box are respectively communicated with a pipeline for facilitating the air inlet and outlet.

3. The air preheater of claim 2, wherein said preheater tube is disposed in a spiral shape, and said hot air tube is disposed on a spiral central axis of said preheater tube in correspondence with said preheater tube.

4. The air preheating device according to claim 1, wherein the hot air pipe is provided with a plurality of air holes uniformly from top to bottom in the circumferential direction.

5. The air preheating device according to claim 1, wherein a baffle plate is fixedly mounted at the lower end of the preheating chamber through a bracket, and the baffle plate is arranged above the hot air inlet pipe.

6. The air preheating device according to claim 2, wherein the air inlet box and the air outlet box are respectively provided with a mounting rack, a sealing and heat-insulating cylinder is arranged on the mounting racks, the sealing and heat-insulating cylinder is used for sealing and wrapping the preheating cylinder, the air inlet box and the air outlet box, and the pipeline, the hot air outlet pipe and the hot air inlet pipe penetrate through the sealing and heat-insulating cylinder and are arranged in a sealing manner.