Biomass hot blast stove heat exchanger

Abstract

The utility model relates to the field of heat exchangers, in particular to a biomass hot blast stove heat exchanger which comprises a heat exchanger body, a heat exchange cavity and a smoke flowing cavity arranged in the heat exchange cavity are arranged in the heat exchanger body, a heat exchange pipe is arranged between the heat exchange cavity and the smoke flowing cavity, and a spiral guide plate is arranged in the heat exchange cavity in the axial direction of the heat exchange cavity. An air flow channel for external air to flow is formed between the spiral flow guide plate and the inner wall of the heat exchange cavity; a rotor is rotationally arranged in the smoke flowing cavity, a spiral blade is arranged on the rotor in the axial direction of the rotor, and the spiral blade is in clearance fit with the heat exchange pipe. According to the utility model, a flue gas flow channel for flue gas to flow can be formed between the heat exchange tube and the heat exchange tube, so that the flow path of the flue gas in the flue gas flow cavity is better improved, and after dust is accumulated on the tube wall of the heat exchange tube, the rotor can be driven to scrape off the dust on the tube wall of the heat exchange tube; and therefore, the heat exchanger body has a better heat exchange effect.

Description

Technical Field

[0001] The utility model relates to the field of heat exchangers, and more specifically, to a biomass hot blast stove heat exchanger. Background Art

[0002] Biomass fuel hot blast stoves are currently widely used as heat sources in tobacco, vegetables and other agricultural product baking rooms. Its working principle is: biomass fuel is conveyed to the hearth of the hot blast stove by a feeding device for combustion, and the high-temperature air generated by the flame heats the air in the heat exchanger to generate hot air, and the hot air is conveyed to the baking room to provide heat for the baking work. Since the air after the combustion of biomass fuel contains more soot, the soot is easily accumulated at the tube wall of the heat exchanger (such as a shell-and-tube heat exchanger), thus interfering with the heat exchange effect. Content of the Utility Model

[0003] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0004] A biomass hot blast stove heat exchanger includes a heat exchanger main body. A heat exchange chamber and a flue gas flow chamber arranged in the heat exchange chamber are provided in the heat exchanger main body. Heat exchange tubes are arranged between the heat exchange chamber and the flue gas flow chamber. A spiral guide plate arranged along the axial direction thereof is provided in the heat exchange chamber. An air flow channel for the outside air to flow is formed between the spiral guide plate and the inner wall of the heat exchange chamber; A rotor is rotatably arranged in the flue gas flow chamber. Spiral blades arranged along the axial direction thereof are provided at the rotor. The spiral blades are in clearance fit with the heat exchange tubes, and a flue gas flow channel for the flue gas to flow is formed between the spiral blades and the heat exchange tubes.

[0005] As a preferred embodiment of the utility model, the heat exchanger main body includes a sleeve. The sleeve includes an outer shell and heat exchange tubes. The heat exchange chamber is formed between the outer shell and the heat exchange tubes. Sealing plates for sealing the heat exchange tubes are provided at both ends of the sleeve. A flue gas flow chamber is formed between the sealing plates and the heat exchange tubes.

[0006] As a preferred embodiment of the utility model, it further includes a driving mechanism for driving the rotor to rotate; One end of the rotor extends out of the sealing plate. A gear ring is provided at the end of the rotor extending out of the sealing plate. The driving mechanism includes a reduction box. A gear meshing with the gear ring is provided at the output shaft of the reduction box; The driving mechanism further includes a reduction box motor. The rotating shaft of the reduction box motor is connected to the input shaft of the reduction box.

[0007] As a preferred embodiment of the utility model, sealing plate through holes are provided at the sealing plates at both ends of the sleeve. Connecting flanges communicated with the flue gas flow chamber are provided at the sealing plate through holes.

[0008] As a preferred embodiment of the utility model, an air inlet pipe and an exhaust pipe communicated with the heat exchange chamber are respectively provided at both axial ends of the sleeve.

[0009] As a preferred embodiment of the present utility model, bearings are provided at both ends of the rotor.

[0010] The present utility model adopts the above technical solutions, and the beneficial effects that can be achieved are as follows:

[0011] Through the arrangement of the rotor and the spiral blades, the present utility model can not only form a flue gas flow channel for flue gas to flow between the heat exchange tubes, thereby preferably improving the flow path of the flue gas in the flue gas flow cavity, and thus preferably improving the heat exchange effect, but also drive the rotor to scrape off the soot on the wall of the heat exchange tube after dust accumulates on the wall of the heat exchange tube, thereby ensuring that the heat exchanger body has a better heat exchange effect. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of the heat exchanger body in Embodiment 1.

[0013] Figure 2 For Figure 1 a cross-sectional view of the heat exchanger body in

[0014] Figure 3 For Figure 2 a schematic structural diagram of the rotor in Detailed Embodiments

[0015] To further understand the content of the present utility model, the present utility model will be described in detail in combination with the drawings and embodiments. It should be understood that the embodiments are only for explaining the present utility model and not for limiting it.

[0016] Embodiment 1

[0017] As Figures 1-3 shown, this embodiment provides a biomass hot blast stove heat exchanger, which includes a heat exchanger body 100. A heat exchange cavity 210 and a flue gas flow cavity 220 arranged in the heat exchange cavity 210 are provided in the heat exchanger body 100. In this embodiment, in order to realize the heat exchange cavity 210 and the flue gas flow cavity 220 arranged in sequence from outside to inside in the heat exchanger body 100, the heat exchanger body 100 is set as a sleeve 110. The sleeve 110 includes an outer shell 290 and heat exchange tubes 230. A heat exchange cavity 210 is formed between the outer shell 290 and the heat exchange tubes 230. Sealing plates 120 for sealing the heat exchange tubes 230 are provided at both ends of the sleeve 110. A flue gas flow cavity 220 is formed between the sealing plates 120 and the heat exchange tubes 230.

[0018] A heat exchange tube 230 is provided between the heat exchange chamber 210 and the flue gas flow chamber 220. A spiral guide plate 240 is provided in the heat exchange chamber 210 along its axial direction. An air flow passage 250 for the outside air to flow is formed between the spiral guide plate 240 and the inner wall of the heat exchange chamber 210. A rotor 260 is rotatably provided in the flue gas flow chamber 220, and bearings 2110 are provided at both ends of the rotor 260. A spiral blade 270 is provided on the rotor 260 along its axial direction. The spiral blade 270 is in clearance fit with the heat exchange tube 230, and a flue gas flow passage 280 for the flue gas to flow is formed between the spiral blade 270 and the heat exchange tube 230.

[0019] During use, the flue gas generated after burning biomass fuel is introduced into the flue gas flow chamber 220, and the outside air to be heated is introduced into the heat exchange chamber 210. When the flue gas passes through the flue gas flow passage 280, the heat in the flue gas heats the outside air in the heat exchange chamber 210 through the heat exchange tube 230, and the heated outside air is discharged from the heat exchange chamber 210 and can be used to provide heat for the baking room. In order to ensure that the heat exchange tube 230 has sufficient heat exchange effect, the heat exchange tube 230 in this embodiment is made of a metal material with good thermal conductivity.

[0020] When soot accumulates on the wall of the heat exchange tube 230, the rotor is driven to rotate. Since the rotor is spiral and in clearance fit with the wall of the heat exchange tube 230, the soot accumulated on the wall of the heat exchange tube 230 can be scraped off, thus avoiding poor heat exchange effect caused by the accumulation of soot at the heat exchange tube 230 and ensuring that the heat exchanger main body 100 has better heat exchange effect.

[0021] In this embodiment, through the arrangement of the rotor 260 and the spiral blade 270 of the heat exchanger main body 100, not only a flue gas flow passage 280 for the flue gas to flow can be formed between the heat exchange tube 230, thus better improving the flow path of the flue gas in the flue gas flow chamber 220 and better improving the heat exchange effect, but also when dust accumulates on the wall of the heat exchange tube 230, the rotor 260 can be driven to scrape off the soot on the wall of the heat exchange tube 230, thus ensuring that the heat exchanger main body 100 has better heat exchange effect.

[0022] In this embodiment, the heat exchanger main body 100 further includes a driving mechanism for driving the rotor 260 to rotate; one end of the rotor 260 extends out of the sealing plate 120, and a gear ring 130 is provided at the end of the rotor 260 extending out of the sealing plate 120. The driving mechanism includes a reduction box 140, and a gear 150 meshing with the gear ring 130 is provided at the output shaft of the reduction box 140; the driving mechanism further includes a reduction box motor 160, and the rotating shaft of the reduction box motor 160 is connected to the input shaft of the reduction box 140.

[0023] In this embodiment, through the arrangement of the driving mechanism structure, the driving of the rotor can be better realized.

[0024] In this embodiment, sealing plate through holes 2100 are provided at the sealing plates 120 at both ends of the sleeve 110, and connecting flanges 170 communicating with the flue gas flow chamber 220 are provided at the sealing plate through holes 2100. Intake pipes 180 and exhaust pipes 190 communicating with the heat exchange chamber 210 are respectively provided at both axial ends of the sleeve 110.

[0025] In this example, through the setting of the connecting flange 170, flue gas can be introduced into the flue gas flow chamber 220 and discharged from the flue gas flow chamber 220. Through the setting of the intake pipe 180, outside air can be introduced into the heat exchange chamber 210. Through the setting of the exhaust pipe 190, the heated air can be discharged from the heat exchange chamber 210.

[0026] When the heat exchanger body in this embodiment is in use, the flue gas generated after burning biomass fuel is introduced into the flue gas flow chamber 220 through the connecting flange 170 at one end of the sealing plate 120 and discharged from the connecting flange 170 at the other end; outside air is introduced into the heat exchange chamber 210 through the intake pipe 180. When the flue gas passes through the flue gas flow path 280, the heat in the flue gas heats the outside air in the heat exchange chamber 210 through the heat exchange tubes 230, and the heated outside air is discharged from the exhaust pipe 190 and can be used to provide heat for the baking room. When soot accumulates on the wall of the heat exchange tube 230, the rotor is driven to rotate. Since the rotor is spiral and has a clearance fit with the wall of the heat exchange tube 230, the soot accumulated on the wall of the heat exchange tube 230 can be scraped off. When a certain amount of soot accumulates in the flue gas flow chamber 220, just open the sealing plate to clean the accumulated soot.

[0027] In summary, the above are only the preferred embodiments of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope covered by the patent of the present invention.

Claims

1. A biomass hot air stove heat exchanger, characterized in that: It includes a heat exchanger main body (100). A heat exchange chamber (210) and a flue gas flow chamber (220) arranged in the heat exchange chamber (210) are provided inside the heat exchanger main body (100). Heat exchange tubes (230) are arranged between the heat exchange chamber (210) and the flue gas flow chamber (220). A spiral guide plate (240) arranged along its axial direction is provided in the heat exchange chamber (210). An air flow channel (250) for the outside air to flow is formed between the spiral guide plate (240) and the inner wall of the heat exchange chamber (210). A rotor (260) is rotatably arranged in the flue gas flow chamber (220). Spiral blades (270) arranged along its axial direction are provided at the rotor (260). A clearance fit is provided between the spiral blades (270) and the heat exchange tubes (230). A flue gas flow channel (280) for the flue gas to flow is formed between the spiral blades (270) and the heat exchange tubes (230).

2. The biomass hot air stove heat exchanger according to claim 1, wherein: The heat exchanger main body (100) includes a sleeve (110). The sleeve (110) includes an outer shell (290) and heat exchange tubes (230). A heat exchange chamber (210) is formed between the outer shell (290) and the heat exchange tubes (230). Sealing plates (120) for sealing the heat exchange tubes (230) are provided at both ends of the sleeve (110). A flue gas flow chamber (220) is formed between the sealing plates (120) and the heat exchange tubes (230).

3. The biomass hot air stove heat exchanger according to claim 2, characterized in that: It also includes a driving mechanism for driving the rotor (260) to rotate. One end of the rotor (260) extends out of the sealing plate (120). A gear ring (130) is provided at the end of the rotor (260) extending out of the sealing plate (120). The driving mechanism includes a reduction box (140). A gear (150) meshing with the gear ring (130) is provided at the output shaft of the reduction box (140). The driving mechanism also includes a reduction box motor (160). The rotating shaft of the reduction box motor (160) is connected to the input shaft of the reduction box (140).

4. A biomass hot air stove heat exchanger according to claim 2, characterized in that: Sealing plate through holes (2100) are provided at the sealing plates (120) at both ends of the sleeve (110). Connecting flanges (170) communicating with the flue gas flow chamber (220) are provided at the sealing plate through holes (2100).

5. The biomass hot air stove heat exchanger according to claim 2, characterized in that: An air inlet pipe (180) and an exhaust pipe (190) communicating with the heat exchange chamber (210) are respectively provided at both axial ends of the sleeve (110).

6. The biomass hot air stove heat exchanger according to claim 1, wherein: Bearings (2110) are provided at both ends of the rotor (260).

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