Heating device for drying

Abstract

The heating device for drying comprises an upper heat exchange shell and a lower heat exchange shell, a middle shell is arranged between the upper heat exchange shell and the lower heat exchange shell, and a vertical partition plate is fixed to the middle of the right portion of the middle shell. The vertical partition plate divides the middle shell into an air inlet transition cavity located on the left portion and an air return cavity located on the right portion. A plurality of upper heat exchange air guide pipes are arranged in the upper heat exchange shell right above the air inlet transition cavity, the upper heat exchange air guide pipes are fixed on a top plate and a bottom plate of the upper heat exchange shell, and the top ends and the bottom ends of the upper heat exchange air guide pipes extend out of the top surface of the top plate of the upper heat exchange shell and the bottom surface of the bottom plate of the upper heat exchange shell; after air is heated, gas passing through the upper heat exchange shell and the lower heat exchange shell is heated in a heat exchange mode, the gas can be oxygen-free gas and can be introduced into a box containing materials to be dried, it can be guaranteed that the materials in the box are basically not oxidized when being dried, the drying quality is guaranteed, and the effect is good.

Description

Technical Field:

[0001] The utility model relates to the technical field of drying equipment, and more specifically to a heating device for drying. Background Art:

[0002] Existing fresh materials, such as bamboo slices, etc., need to be dried before use. Existing drying equipment generally uses an electric heating method to heat the gas in the drying equipment. It generally directly contacts the air for heating. Since there is a large amount of oxygen mixed in the air, when drying fresh materials such as bamboo slices, it will cause the surface of the materials to oxidize, affecting their quality.

[0003] Moreover, it is not suitable for circulating heating of gas, that is, circulating heating of flowing gas, and its scope of application is not ideal. Summary of the Utility Model:

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a heating device for drying. The gas flowing through the upper heat exchange housing and the lower heat exchange housing can be communicated with the box body of the drying equipment through the air outlet connecting head and the air inlet connecting head to realize the circulating flow of the gas. The gas can adopt an anaerobic gas and can be introduced into the drying equipment where the materials are placed for drying, which can ensure that when the materials in the box body are dried, they are basically not oxidized, ensuring the drying quality and having a good effect. Moreover, after heating the air, it heats the gas flowing through the upper heat exchange housing and the lower heat exchange housing through a heat exchange method, which can be used for circulating flow heating of the gas and has a wide range of uses.

[0005] The solution for the utility model to solve the above technical problems is:

[0006] A heating device for drying includes an upper heat exchange housing and a lower heat exchange housing. An intermediate housing is provided between the upper heat exchange housing and the lower heat exchange housing. A vertical partition plate is fixed in the middle of the right part of the intermediate housing. The vertical partition plate divides the intermediate housing into an air inlet transition cavity in the left part and a return air cavity in the right part;

[0007] In the upper heat exchange housing directly above the air inlet transition cavity, a plurality of upper heat exchange guide pipes are provided. The upper heat exchange guide pipes are fixed on the top plate and the bottom plate of the upper heat exchange housing. The top end and the bottom end of the upper heat exchange guide pipe extend out of the top surface of the top plate and the bottom surface of the bottom plate of the upper heat exchange housing. In the lower heat exchange housing directly below the air inlet transition cavity, a plurality of lower heat exchange guide pipes are provided. The lower heat exchange guide pipes are fixed on the top plate and the bottom plate of the lower heat exchange housing. The top end and the bottom end of the lower heat exchange guide pipe extend out of the top surface of the top plate and the bottom surface of the bottom plate of the lower heat exchange housing. All the upper heat exchange guide pipes and the lower heat exchange guide pipes communicate with the air inlet transition cavity;

[0008] An air outlet connection head is connected to the left side plates of the upper heat exchange housing and the lower heat exchange housing. An air inlet connection head is connected to the right side plates of the upper heat exchange housing and the lower heat exchange housing. A lower support frame is fixed to the bottom surface of the bottom plate of the lower heat exchange housing. A bottom support plate is fixed to the bottom of the lower support frame. A heating box is fixed to the bottom surface of the bottom plate of the lower heat exchange housing. A heating device is installed in the heating box. The bottom ends of all the lower heat exchange air pipes communicate with the heating box.

[0009] A plurality of heat exchange fins extending outward are formed on the outer side walls and inner side walls of the upper heat exchange air pipes and the lower heat exchange air pipes.

[0010] The air inlet connection heads of the upper heat exchange housing and the lower heat exchange housing are respectively connected to the air outlet of the corresponding blower. The two blowers are fixed on the side support frames fixed to the top surface of the bottom support plate at the right side of the upper heat exchange housing and the lower heat exchange housing.

[0011] A gas collecting hood is fixed to the top surface of the top plate of the upper heat exchange housing at all the upper heat exchange air pipes. The gas collecting hood covers the tops of all the upper heat exchange air pipes and communicates with all the upper heat exchange air pipes. An upper connecting pipe is connected to the top of the gas collecting hood.

[0012] A plurality of upper return air heat exchange air pipes are provided in the upper heat exchange housing directly above the return air chamber. The upper return air heat exchange air pipes are fixed to the top plate and the bottom plate of the upper heat exchange housing. The top end and the bottom end of the upper return air heat exchange air pipe extend out of the top surface of the top plate and the bottom surface of the bottom plate of the upper heat exchange housing. A plurality of lower return air heat exchange air pipes are provided in the lower heat exchange housing directly below the return air chamber. The lower return air heat exchange air pipes are fixed to the top plate and the bottom plate of the lower heat exchange housing. The top end and the bottom end of the lower return air heat exchange air pipe extend out of the top surface of the top plate and the bottom surface of the bottom plate of the lower heat exchange housing. All the upper return air heat exchange air pipes and the lower return air heat exchange air pipes communicate with the return air chamber.

[0013] A return air hood is fixed to the top surface of the top plate of the upper heat exchange housing at the tops of all the upper return air heat exchange air pipes. The top ends of all the upper return air heat exchange air pipes are located in the return air hood. The air outlet of the upper connecting pipe is fixed to the top plate of the return air hood and communicates with the return air hood.

[0014] A lower gas collecting housing is fixed to the bottom surface of the bottom plate of the lower heat exchange housing directly below the return air chamber. The bottom ends of all the lower return air heat exchange air pipes communicate with the lower gas collecting housing. A vertical exhaust pipe extending upward is connected to the rear wall plate of the lower gas collecting housing.

[0015] The outstanding effect of the present utility model is:

[0016] The gas flowing through its upper heat exchange shell and lower heat exchange shell can be communicated with the box body of the drying equipment through the air outlet connector and the air inlet connector to realize the circulating flow of the gas. The gas can be an oxygen-free gas and can be introduced into the drying equipment containing materials for drying, which can ensure that the materials in the box body are basically not oxidized during drying, guarantee the drying quality, and have good effects. Moreover, after heating the air, it heats the gas flowing through the upper heat exchange shell and the lower heat exchange shell through heat exchange, which can be used for the circulating flow heating of the gas and has a wide range of applications. Brief Description of the Drawings:

[0017] Figure 1 is a partial structural schematic diagram of the present invention;

[0018] Figure 2 is a partial structural schematic diagram of the present invention from another angle;

[0019] Figure 3 is a partial top view of the present invention;

[0020] Figure 4 is Figure 3 the A-A cross-sectional view of

[0021] Figure 5 is Figure 4 the partial enlarged view of Detailed Description of the Preferred Embodiments:

[0022] In an embodiment, as shown in Figures 1 to 5 a heating device for drying includes an upper heat exchange shell 10 and a lower heat exchange shell 11. A middle shell 12 is fixed between the upper heat exchange shell 10 and the lower heat exchange shell 11. The middle shell 12 is formed by welding four side plates on the left, right, front, and rear to form a rectangular frame shape. Its top surface is welded and fixed to the bottom surface of the bottom plate of the upper heat exchange shell 10, and its bottom surface is welded and fixed to the top surface of the top plate of the lower heat exchange shell 11;

[0023] In the middle of the right part of the middle shell 12, a vertical partition plate 121 is fixed. The front and rear side walls of the vertical partition plate 121 are welded and fixed to the inner side walls of the front and rear wall plates of the middle shell 12. The top surface and the bottom surface of the vertical partition plate 12 are welded and fixed to the bottom plate of the upper heat exchange shell 10 and the top plate of the lower heat exchange shell 11. The vertical partition plate 121 divides the middle shell 12 into an air inlet transition chamber 122 on the left and a return air chamber 123 on the right;

[0024] Above the intake transition chamber 122, in the upper heat exchange housing 10, there are multiple upper heat exchange gas guide pipes 13. The upper heat exchange gas guide pipes 13 are fixed on the top plate and the bottom plate of the upper heat exchange housing 10. The top end and the bottom end of the upper heat exchange gas guide pipes 13 extend out of the top surface of the top plate and the bottom surface of the bottom plate of the upper heat exchange housing 10. Below the intake transition chamber 122, in the lower heat exchange housing 11, there are multiple lower heat exchange gas guide pipes 111. The lower heat exchange gas guide pipes 111 are fixed on the top plate and the bottom plate of the lower heat exchange housing 11. The top end and the bottom end of the lower heat exchange gas guide pipes 111 extend out of the top surface of the top plate and the bottom surface of the bottom plate of the lower heat exchange housing 11. All the upper heat exchange gas guide pipes 13 and the lower heat exchange gas guide pipes 111 communicate with the intake transition chamber 122;

[0025] Above the return air chamber 123, in the upper heat exchange housing 10, there are multiple upper return air heat exchange gas guide pipes 104. The upper return air heat exchange gas guide pipes 104 are fixed on the top plate and the bottom plate of the upper heat exchange housing 10. The top end and the bottom end of the upper return air heat exchange gas guide pipes 104 extend out of the top surface of the top plate and the bottom surface of the bottom plate of the upper heat exchange housing 10. Below the return air chamber 123, in the lower heat exchange housing 11, there are multiple lower return air heat exchange gas guide pipes 105. The lower return air heat exchange gas guide pipes 105 are fixed on the top plate and the bottom plate of the lower heat exchange housing 11. The top end and the bottom end of the lower return air heat exchange gas guide pipes 105 extend out of the top surface of the top plate and the bottom surface of the bottom plate of the lower heat exchange housing 11. All the upper return air heat exchange gas guide pipes 104 and the lower return air heat exchange gas guide pipes 105 communicate with the return air chamber 123;

[0026] On the outer side wall and the inner side wall of the upper heat exchange gas guide pipes 13, the lower heat exchange gas guide pipes 111, the upper return air heat exchange gas guide pipes 104, and the lower return air heat exchange gas guide pipes 105, there are multiple heat exchange fins 112 extending outwards. Among them, the inner diameters of the upper return air heat exchange gas guide pipes 104 and the lower return air heat exchange gas guide pipes 105 are larger than the inner diameters of the upper heat exchange gas guide pipes 13 and the lower heat exchange gas guide pipes 111.

[0027] Furthermore, on the left side plates of the upper heat exchange housing 10 and the lower heat exchange housing 11, there are air outlet connection heads 14 connected. On the right side plates of the upper heat exchange housing 10 and the lower heat exchange housing 11, there are air inlet connection heads 15 connected. On the bottom surface of the bottom plate of the lower heat exchange housing 11, there is a lower support frame 16 fixed. At the bottom of the lower support frame 16, there is a bottom support plate fixed. On the bottom surface of the bottom plate of the lower heat exchange housing 11, there is a heating box 17 fixed. In the heating box 17, there is a heating device 18 installed. The bottom ends of all the lower heat exchange gas guide pipes 111 communicate with the heating box 17.

[0028] On the outer side wall and the inner side wall of the upper heat exchange gas guide pipes 13 and the lower heat exchange gas guide pipes 111, there are multiple heat exchange fins 112 extending outwards.

[0029] On one side plate of the heating box 17, there is an observation port 171 connected.

[0030] A through groove is formed in the middle of the rear wall plate of the heating box body 17. The rear part of the heating device 18 faces the through groove, and the rear part of the bottom frame extends out of the through groove. A lower through groove is formed on the bottom plate of the heating box body 17, which is directly below the heating device 18.

[0031] The air inlet connectors 15 of the upper heat exchange shell 10 and the lower heat exchange shell 11 are both connected to the air outlet of the corresponding blower 19. The two blowers 19 are fixed on the side support frames fixed on the top surface of the bottom support plate on the right side of the upper heat exchange shell 10 and the lower heat exchange shell 11.

[0032] A gas collecting hood 101 is fixed on the top surface of the top plate of the upper heat exchange shell 10 at all the upper heat exchange air ducts 13. The gas collecting hood 101 covers the tops of all the upper heat exchange air ducts 13 and communicates with all the upper heat exchange air ducts 13. The top of the gas collecting hood 101 is connected to an upper connecting pipe 102.

[0033] A return air hood 106 is fixed on the top surface of the top plate of the upper heat exchange shell 10 at the tops of all the upper return air heat exchange air ducts 104. The tops of all the upper return air heat exchange air ducts 104 are located in the return air hood 106. The air outlet of the upper connecting pipe 102 is fixed on the top plate of the return air hood 106 and communicates with the return air hood 106.

[0034] A lower gas collecting shell 107 is fixed on the bottom surface of the bottom plate of the lower heat exchange shell 11 directly below the return air chamber 123. The bottoms of all the lower return air heat exchange air ducts 105 communicate with the lower gas collecting shell 107. A vertical exhaust pipe 108 extending upward is connected to the rear wall plate of the lower gas collecting shell 107.

[0035] The heating device 18 is a gas combustion furnace. Its structure is basically the same as that of the main combustion part of a small heating and drying furnace with a Chinese patent application number of 202322115438.1, and its principle is also basically the same, so it will not be elaborated here.

[0036] When this embodiment is in use, the end of the vertical exhaust pipe 108 can be connected to the air inlet of the combustion recovery device, the air inlets of the two blowers 19 can be connected to the air outlet of the tank containing the specified drying gas, and the two air outlet connectors 14 can be connected to the air inlet of the tank containing the material to be dried.

[0037] When in use, first the heating device 18 is turned on to achieve heating. During heating, since the end of the vertical exhaust pipe 108 is connected to the air inlet of the combustion recovery device, the heated gas is thus introduced into the intake transition chamber 122 along all the lower heat exchange air ducts 111 for mixing, and then conveyed upward through all the upper heat exchange air ducts 13; the intake transition chamber 122 can ensure the stability of gas flow.

[0038] By operating two blowers 19, gas (oxygen-free gas) is introduced into the upper heat exchange housing 10 and the lower heat exchange housing 11, where it exchanges heat with the gas heated by the lower heat exchange gas pipe 111 and the upper heat exchange gas pipe 13. The heat exchange fins 112 are used to improve the heat exchange efficiency and effect.

[0039] The combusted gas after heat exchange enters all the upper return air heat exchange gas pipes 104 from the gas collecting hood 101, then enters the return air chamber 123 for transitional mixing, then enters the lower gas collecting housing 107 through all the lower return air heat exchange gas pipes 105, and then enters the combustion recovery device through the vertical exhaust pipe 108. When it enters the upper return air heat exchange gas pipe 104 and the lower return air heat exchange gas pipe 105, it exchanges heat with the gas entering the upper heat exchange housing 10 and the lower heat exchange housing 11 again, so that the gas entering the upper heat exchange housing 10 and the lower heat exchange housing 11 is further heated and the temperature is increased. This gas finally enters the tank for drying the materials, and the oxygen-free gas is heated by the heat exchange method and the materials in the drying tank are dried, meeting the drying requirements. It can ensure that the materials in the tank are basically not oxidized during drying, ensuring the drying quality and good effect. Then, the gas after heat exchange enters the upper heat exchange housing 10 and the lower heat exchange housing 11 through the blower 19 again from the tank for heat exchange and temperature rise, and then enters the tank for drying, realizing cyclic heating and drying for use and meeting the usage requirements.

[0040] Moreover, the gas exchanges heat with the lower heat exchange gas pipe 111, the upper heat exchange gas pipe 13, the lower return air heat exchange gas pipe 105 and the upper return air heat exchange gas pipe 104 multiple times, greatly improving the heat exchange and heating effect and having a good usage effect.

Claims

1. A drying heating device, comprising an upper heat exchange shell (10) and a lower heat exchange shell (11), characterized in that: An intermediate shell (12) is provided between the upper heat exchange shell (10) and the lower heat exchange shell (11); a vertical partition plate (121) is fixed to the middle of the right part of the intermediate shell (12); the vertical partition plate (121) divides the intermediate shell (12) into an air intake transition chamber (122) at the left part and an air return chamber (123) at the right part; A plurality of upper heat exchange air ducts (13) are provided in the upper heat exchange shell (10) directly above the air inlet transition chamber (122), and the top and bottom ends of the upper heat exchange air ducts (13) extend out of the top surface of the top plate and the bottom surface of the bottom plate of the upper heat exchange shell (10); a plurality of lower heat exchange air ducts (111) are provided in the lower heat exchange shell (11) directly below the air inlet transition chamber (122), and the top and bottom ends of the lower heat exchange air ducts (111) extend out of the top surface of the top plate and the bottom surface of the bottom plate of the lower heat exchange shell (11); and all the upper heat exchange air ducts (13) and the lower heat exchange air ducts (111) are in communication with the air inlet transition chamber (122); The left side plates of the upper heat exchange shell (10) and the lower heat exchange shell (11) are both connected to an air outlet connector (14), the right side plates of the upper heat exchange shell (10) and the lower heat exchange shell (11) are both connected to an air inlet connector (15), a lower support frame (16) is fixed to the bottom surface of the bottom plate of the lower heat exchange shell (11), a bottom support plate is fixed to the bottom of the lower support frame (16), a heating box (17) is fixed to the bottom surface of the bottom plate of the lower heat exchange shell (11), a heating device (18) is installed in the heating box (17), and the bottom ends of all the lower heat exchange air guide pipes (111) are connected to the heating box (17).

2. A drying heating device according to claim 1, characterized in that: A plurality of heat exchange fins (112) extending outwards are formed on the outer side walls and the inner side walls of the upper heat exchange air duct (13) and the lower heat exchange air duct (111).

3. A drying heating device according to claim 1, characterized in that: An observation port (171) is connected to a side plate of the heating box (17).

4. A drying heating device according to claim 3, characterized in that: A through groove is formed in the middle of the rear wall plate of the heating box (17), and the rear of the heating device (18) faces the through groove. A lower through groove is formed on the bottom plate of the heating box (17), and is located directly below the heating device (18).

5. A drying heating device according to claim 1, characterized in that: The air inlet connectors (15) of the upper heat exchange shell (10) and the lower heat exchange shell (11) are both connected to the air outlets of the corresponding blowers (19), and the two blowers (19) are fixed on the side support frame fixed on the top surface of the bottom support plate at the right side of the upper heat exchange shell (10) and the lower heat exchange shell (11).

6. A drying heating device according to claim 1, characterized in that: An air collecting hood (101) is fixed on the top surface of the top plate of the upper heat exchange shell (10) at all the upper heat exchange air ducts (13); the air collecting hood (101) covers the top of all the upper heat exchange air ducts (13) and is in communication with all the upper heat exchange air ducts (13); the top of the air collecting hood (101) is connected to an upper connecting pipe (102); A plurality of upper return air heat exchange air pipes (104) are provided in the upper heat exchange shell (10) directly above the return air cavity (123), and the top and bottom ends of the upper return air heat exchange air pipes (104) extend out of the top surface of the top plate and the bottom surface of the bottom plate of the upper heat exchange shell (10); a plurality of lower return air heat exchange air pipes (105) are provided in the lower heat exchange shell (11) directly below the return air cavity (123), and the top and bottom ends of the lower return air heat exchange air pipes (105) extend out of the top surface of the top plate and the bottom surface of the bottom plate of the lower heat exchange shell (11); and all the upper return air heat exchange air pipes (104) and the lower return air heat exchange air pipes (105) are in communication with the return air cavity (123); A return air hood (106) is fixed on the top surface of the top plate of the upper heat exchange shell (10) at the top of all the upper return air heat exchange air ducts (104), the top ends of all the upper return air heat exchange air ducts (104) are in the return air hood (106), and the air outlet of the upper connecting pipe (102) is fixed on the top plate of the return air hood (106) and communicates with the return air hood (106).

7. A drying heating device according to claim 6, characterized in that: A lower air collecting shell (107) is fixed to the bottom surface of the bottom plate of the lower heat exchange shell (11) directly below the return air cavity (123), the bottom ends of all lower return air heat exchange air guide pipes (105) are connected to the lower air collecting shell (107), and a vertical exhaust pipe (108) extending upward is connected to the rear wall plate of the lower air collecting shell (107).

8. A drying heating device according to claim 1, characterized in that: The heating device (18) is a gas combustion furnace.

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