Vertical combustion furnace

Abstract

The utility model relates to the field of combustion furnaces, in particular to a vertical combustion furnace. Comprising a combustion furnace and an air blower, the combustion furnace comprises more than three smoke pipes and air pipes which are vertically arranged and sequentially sleeved layer by layer from inside to outside, air ducts are formed in the air pipes, flues are formed in the smoke pipes, and heat exchange is conducted between the flues and the air ducts, so that a mutually-nested structure that one layer of flue is sleeved with one layer of air duct is formed; the outermost layer of air pipe is communicated with an air blower, the heads or the tails of every two adjacent air pipes are communicated, air blown in by the air blower flows from the outer layer of air pipe to the inner layer of air pipe, and the innermost layer of air pipe is provided with an air outlet channel blowing air outwards; the innermost layer smoke pipe is provided with a feeding pipe, fuel enters the innermost layer smoke pipe from the feeding pipe to be combusted, the heads or the tails of every two adjacent smoke pipes are communicated, and smoke generated by combustion flows from the inner layer smoke pipe to the outer layer smoke pipe. According to the vertical combustion furnace, the heat energy utilization rate can be increased, and air outlet is more uniform.

Description

Technical Field

[0001] This application relates to the field of combustion furnaces, and particularly to a vertical combustion furnace. Background Art

[0002] The vertical combustion furnace in the related art adopts a simple reciprocating bending arrangement structure. Such a combustion furnace is not suitable for a dryer because the combustion furnace with this structure will cause uneven heating of the drying material, thus affecting the drying quality. Moreover, the flue gas generated by the existing combustion furnace is usually directly discharged, which will take away a large amount of heat energy, resulting in problems such as waste of heat energy. Summary of the Invention

[0003] In view of this, this application provides a vertical combustion furnace, which can improve the heat energy utilization rate and make the air outlet more uniform.

[0004] To achieve the above object, this application is realized through the following technical solutions:

[0005] A vertical combustion furnace, characterized in that: it includes a combustion furnace and a blower. The combustion furnace includes more than three vertically arranged flue pipes and air pipes that are sequentially sleeved layer by layer from the inside to the outside. An air duct is formed inside the air pipe, and a flue is formed inside the flue pipe. Heat exchange is carried out between the flue and the air duct, thereby forming a nested structure in which one layer of flue is wrapped by one layer of air duct; the outermost air pipe is connected to the blower, the heads or tails of adjacent two air pipes are connected, the air blown by the blower flows from the outer air pipe to the inner air pipe, and an air outlet channel for blowing air outward is provided on the innermost air pipe; an inlet pipe is provided on the innermost flue pipe, fuel enters the innermost flue pipe through the inlet pipe for combustion, the heads or tails of adjacent two flue pipes are connected, and the flue gas generated by combustion flows from the inner flue pipe to the outer flue pipe.

[0006] The above-mentioned vertical combustion furnace of this application adopts a nested structure of flue pipes and air pipes, which can increase the heat exchange area, reduce heat damage, and uniformly blow out hot air through the air outlet channel, so that the air outlet temperature is more uniform.

[0007] In some embodiments, a dust cleaning port is provided at the lower part of each flue pipe, and an openable and closable switch door is provided on the dust cleaning port. Since the flue pipe is of a vertical structure, combustion ash will accumulate at the bottom of the flue pipe. The provision of the dust cleaning port facilitates subsequent dust cleaning work.

[0008] In some embodiments, the outer periphery of the combustion furnace is wrapped with a sealed protective shell. A smoke exhaust port is provided at the lower part of the outermost flue pipe. The smoke exhaust port is connected to a drainage pipe located outside the combustion furnace and inside the protective shell. The drainage pipe is arranged to bend reciprocally from bottom to top. An air inlet is provided at the lower part of the protective shell, and the air inlet is located beside the drainage pipe. An air outlet is provided at the top of the protective shell. The air entering the protective shell from the air inlet passes through the drainage pipe and the combustion furnace and then flows out from the air outlet. The blower is installed at the top of the protective shell and is connected to the air outlet for sending the air led out from the air outlet into the outermost air duct.

[0009] The flue gas discharged from the outermost flue pipe still has a certain residual temperature. Among them, a drainage pipe is added at the smoke exhaust port. When the air enters from the air inlet of the protective shell, it will pass through the drainage pipe and the outer wall of the combustion furnace, and then be sucked by the blower and sent into the outermost air duct. In this way, the air will be heated to a certain temperature by each component during the flowing process, which can improve the thermal energy utilization rate of the tail flue gas and is more environmentally friendly. In order to increase the fluidity of the flue gas, a smoke extractor, a filtering device, etc. can be added at the end of the drainage pipe.

[0010] In some embodiments, the outermost air duct is fixedly installed on the base, and the bottom of the outermost air duct is communicated with the inside of the base. A connection channel is provided inside the base. A control slide plate is slidably connected inside the base. The control slide plate can control the opening and closing of the connection channel during the sliding process. The pulling handle of the control slide plate is exposed outside the protective shell. The connection channel is connected to the blowing air duct, and the blowing air duct is communicated with the innermost flue pipe. When the connection channel is in the open state, it can blow air into the innermost flue pipe for slag cleaning work.

[0011] When the combustion furnace needs to be slag cleaned, the control slide plate can be opened to conduct the connection channel with the blowing air duct. In this way, when the blower sends air into the outermost air duct, the air will pass through the connection channel and the blowing air duct and flow into the innermost flue pipe. The air can blow off the scale adhering to the inner wall of the flue pipe, achieving the effect of cleaning the inner wall of the flue pipe.

[0012] In some embodiments, a plurality of outwardly protruding heat dissipation fins for increasing heat dissipation are provided on the side wall of the innermost flue pipe. The fuel burns inside the innermost flue pipe, and the temperature of this flue pipe is the highest. Adding heat dissipation fins on the side wall of the innermost flue pipe can accelerate the heat exchange speed.

[0013] In some embodiments, the number of both the flue pipes and the air ducts is four. The number of flue pipes and air ducts can be increased or decreased according to actual needs.

[0014] In some embodiments, the outermost air duct includes a pipe body and a pipe top covering the top of the pipe body. The pipe body and the pipe top are connected by a flange structure. The outermost air duct is a detachable structure, which is convenient for later opening for maintenance.

[0015] As can be seen from the above technical solutions, the present application has at least the following advantages and positive effects:

[0016] A vertical combustion furnace of the present application adopts a structure in which a flue pipe and an air pipe are nested with each other, which can increase the heat exchange area, reduce heat damage, and uniformly blow out hot air through the air outlet channel, so that the air outlet temperature is more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an embodiment of the present application Figure 1 ;

[0018] Figure 2 is a schematic structural diagram of an embodiment of the present application Figure 2 ;

[0019] Figure 3 is a schematic structural diagram of the embodiment of the present application after removing the protective shell;

[0020] Figure 4 is a schematic diagram of the use state of the slag cleaning work in the embodiment of the present application;

[0021] Figure 5 is a schematic structural diagram of the innermost flue pipe in the embodiment of the present application;

[0022] Figure 6 is a schematic internal structural diagram of the combustion furnace in the embodiment of the present application;

[0023] Figure 7 is a front view of the outermost air pipe in the embodiment of the present application.

[0024] Reference numerals: 1. Combustion furnace; 11. Outermost air pipe; 111. Pipe body; 112. Pipe top; 12. Innermost air pipe; 13. Air outlet channel; 14. Innermost flue pipe; 15. Feed pipe; 16. Ash cleaning port; 17. Air blowing pipe; 18. Heat dissipation fins; 2. Blower; 3. Protective shell; 31. Air inlet; 32. Air outlet; 4. Drainage pipe; 5. Base; 51. Connection channel; 6. Control slide plate; 61. Pulling handle; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the objectives, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. The terms used in the embodiment part of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

[0026] Refer to Figures 1 to 7, an embodiment of the present application provides a vertical combustion furnace, including a combustion furnace 1 and a blower 2. The combustion furnace 1 includes more than three vertically arranged flue pipes and air pipes that are sequentially sleeved layer by layer from the inside to the outside. An air duct is formed inside the air pipe, and a flue is formed inside the flue pipe. Heat exchange is carried out between the flue and the air duct, thereby forming a nested structure in which one layer of flue is wrapped by one layer of air duct; the outermost air pipe 11 is connected to the blower 2, and the heads or tails of adjacent two air pipes are connected. The air blown in by the blower 2 flows from the outer air pipe to the inner air pipe, and the innermost air pipe 12 is provided with an air outlet passage 13 for blowing air outwards; the innermost flue pipe 14 is provided with a feed pipe 15, and fuel enters the innermost flue pipe 14 through the feed pipe 15 for combustion. The heads or tails of adjacent two flue pipes are connected, and the flue gas generated by combustion flows from the inner flue pipe to the outer flue pipe. A switch door is provided at the opening of the feed pipe 15.

[0027] For this vertical combustion furnace, by adopting the nested structure of the flue pipe and the air pipe, the heat exchange area can be increased, heat loss can be reduced, and the hot air is uniformly blown out through the air outlet passage 13, so that the outlet air temperature is more uniform.

[0028] In some embodiments, referring to Figure 2 and Figure 6 , a dust cleaning port 16 is provided at the lower part of each flue pipe, and a switchable switch door is provided on the dust cleaning port 16. Since the flue pipe is of a vertical structure, combustion ash will accumulate at the bottom of the flue pipe. The provision of the dust cleaning port 16 facilitates subsequent dust cleaning work.

[0029] In some embodiments, referring to Figures 1 - 3 , the outer periphery of the combustion furnace 1 is wrapped with a closed protective shell 3. A smoke exhaust port is provided at the lower part of the outermost flue pipe, and the smoke exhaust port is connected to a drainage pipe 4 located outside the combustion furnace 1 and inside the protective shell 3. The drainage pipe 4 is arranged to bend reciprocally from bottom to top. An air inlet 31 is provided at the lower part of the protective shell 3, and the air inlet 31 is located beside the drainage pipe 4. An air outlet 32 is provided at the top of the protective shell 3. The air entering the protective shell 3 from the air inlet 31 passes through the drainage pipe 4 and the combustion furnace 1 and then flows out from the air outlet 32. The blower 2 is installed at the top of the protective shell 3 and is connected to the air outlet 32 for sending the air led out from the air outlet 32 into the outermost air pipe 11.

[0030] The flue gas discharged from the outermost flue pipe still has a certain residual temperature. By adding the drainage pipe 4 at the smoke exhaust port, when the air enters from the air inlet 31 of the protective shell 3, it will pass through the drainage pipe 4 and the outer wall of the combustion furnace 1, and then be sucked in by the blower 2 and sent into the outermost air pipe 11. In this way, the air will be heated to a certain temperature by each component during the flowing process, which can improve the thermal energy utilization rate of the tail flue gas and is more environmentally friendly. In order to increase the fluidity of the flue gas, a smoking machine and a filtering device can be added at the end of the drainage pipe 4.

[0031] In some embodiments, referring to Figure 4 and Figure 5 , the outermost air duct 11 is fixedly installed on the base 5. The bottom of the outermost air duct 11 is connected to the inside of the base 5. A connection channel 51 is provided inside the base 5. A control slide plate 6 is slidably connected inside the base 5. During the sliding process, the control slide plate 6 can control the opening and closing of the connection channel 51. The pulling handle 61 of the control slide plate 6 is exposed outside the protective shell 3. The connection channel 51 is connected to the air blowing duct 17, and the air blowing duct 17 is connected to the innermost smoke pipe 14. When the connection channel 51 is in the open state, it can blow air to clean the slag in the innermost smoke pipe 14.

[0032] When the combustion furnace 1 needs to be slag-cleaned, the control slide plate 6 can be opened to conduct the connection channel 51 with the air blowing duct 17. In this way, when the blower 2 sends air to the outermost air duct 11, the air will pass through the connection channel 51 and the air blowing duct 17 and flow into the innermost smoke pipe 14. The air can blow off the scale adhering to the inner wall of the smoke pipe, achieving the effect of cleaning the inner wall of the smoke pipe.

[0033] In some embodiments, referring to Figure 5 , a plurality of outwardly protruding heat dissipation fins 18 for increasing heat dissipation are provided on the side wall of the innermost smoke pipe 14. The fuel burns inside the innermost smoke pipe 14, and the temperature of this smoke pipe is the highest. Adding the heat dissipation fins 18 on the side wall of the innermost smoke pipe 14 can accelerate the heat exchange speed.

[0034] In some embodiments, the number of both the smoke pipes and the air ducts is four. The number of the smoke pipes and the air ducts can be increased or decreased according to actual needs.

[0035] In some embodiments, referring to Figure 7 , the outermost air duct 11 includes a pipe body 111 and a pipe top 112 covering the top of the pipe body 111. The pipe body 111 and the pipe top 112 are connected by a flange structure. The outermost air duct 11 is a detachable structure, which is convenient for later opening for maintenance.

[0036] The working process and usage method of the above-mentioned vertical combustion furnace in the above embodiment are briefly described as follows:

[0037] Among them, fuel enters the innermost flue pipe 14 through the feed pipe 15. The fuel burns in the innermost flue pipe 14, and the flue gas generated by the combustion flows reciprocally from the inside to the outside. Finally, the flue gas passes through the diversion pipe, and the blower 2 operates. The air enters the protective shell 3 from the air inlet 31, and after being preheated by the diversion pipe 4 and the combustion furnace 1, it flows out from the air outlet 32. Since the blower 2 is connected to the air outlet 32, the air flowing out from the air outlet 32 is sucked in by the blower 2 and sent into the outermost air duct 11. Then, as the air flows reciprocally from the outside to the inside, it conducts heat interaction with the flue pipe. Finally, the hot air blows out from the air outlet channel 13 to perform the corresponding drying work.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, and are not intended to limit them; although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A vertical combustion furnace, characterized in that: It includes a combustion furnace and a blower. The combustion furnace includes more than three vertically arranged smoke pipes and air ducts which are arranged layer by layer from the inside to the outside. The interior of the air duct forms an air duct, and the interior of the smoke pipe forms a flue. The flue and the air duct exchange heat, thereby forming a mutually nested structure in which one layer of flue is covered with another layer of air duct; the outermost air duct is connected to the blower, and the heads or tails of two adjacent air ducts are connected. The air blown in by the blower flows from the outer air duct to the inner air duct, and the innermost air duct is provided with an air outlet channel for blowing air outwards; the innermost smoke duct is provided with a feed pipe, and fuel enters the innermost smoke duct from the feed pipe for combustion, and the heads or tails of two adjacent smoke pipes are connected, and the smoke generated by combustion flows from the inner smoke duct to the outer smoke duct.

2. A vertical combustion furnace according to claim 1, characterized in that: A ash cleaning port is arranged at the lower part of each smoke pipe, and a switch door which can be opened and closed is arranged on the ash cleaning port.

3. A vertical combustion furnace according to claim 1, characterized in that: The combustion furnace is wrapped with a sealed protective shell on the periphery, and a smoke exhaust port is arranged at the lower part of the outermost smoke pipe, and the smoke exhaust port is connected to a drainage pipe located outside the combustion furnace and inside the protective shell, and the drainage pipe is arranged to bend back and forth from bottom to top, and an air inlet is arranged at the lower part of the protective shell, and the air inlet is located beside the drainage pipe, and an air outlet is arranged on the top of the protective shell, and the wind entering the protective shell from the air inlet passes through the drainage pipe and the combustion furnace and then flows out from the air outlet, and the blower is installed on the top of the protective shell, and the blower is connected to the air outlet, and is used to send the wind led out of the air outlet into the outermost air duct.

4. A vertical combustion furnace according to claim 1, characterized in that: The outermost air duct is fixedly installed on the base, and the bottom of the outermost air duct is connected with the inside of the base. A connecting channel is arranged inside the base, and a control slide is slidably connected inside the base. The control slide can control the opening and closing of the connecting channel during the sliding process. The pulling handle of the control slide is exposed outside the protective shell. The connecting channel is connected to the blowing pipe, and the blowing pipe is connected to the innermost smoke pipe. When the connecting channel is in the open state, air can be blown to the innermost smoke pipe to clear slag.

5. A vertical combustion furnace according to claim 1, characterized in that: A plurality of heat dissipation fins protruding outwards for increasing heat dissipation are arranged on the side wall of the innermost smoke pipe.

6. A vertical combustion furnace according to claim 1, characterized in that: The number of the smoke pipes and the number of the air pipes are both four.

7. A vertical combustion furnace according to claim 1, characterized in that: The outermost air duct comprises a tube body and a tube top covering the top of the tube body, and the tube body and the tube top are connected via a flange structure.

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