Hot blast stove for grain drying

Abstract

The utility model discloses a hot-blast stove for drying grain, which comprises a stove body, a hot-blast stove body and a hot-blast stove body, the water cooling interlayer is arranged in the side wall of the furnace body; the feeding hole is formed in the side wall of the furnace body; the inner hearth is coaxially and vertically arranged in the hearth; a feed port II; an air outlet; one end of the feeding cylinder extends into the hearth from the feeding opening; the guide chute is obliquely arranged in the furnace body; the water cooling interlayer II is communicated with the water cooling interlayer; the air outlet end of the air inlet pipe is arranged at the bottom of the inner hearth; and an ash drawing-out chamber. According to the hot blast stove for drying the grains, the water cooling interlayer and the water cooling interlayer II are arranged, so that the stove body and the material guide groove are cooled in real time; and by arranging the material guide groove, the conditions of flame returning and the like can be avoided, the overall structure is kept stable, and the service life of the hot-blast stove for grain drying is prolonged.

Description

Technical Field

[0001] The utility model relates to a hot air furnace for grain drying. Background Art

[0002] Grain dryer is a type of dryer that dries grain, and hot air furnace is an important component that provides heat source for the dryer. The Chinese patent with application number 201921369696.X discloses a biomass combustion furnace, including a furnace body, a feeding barrel, a lower air duct and a flue; a hollow furnace is provided inside the furnace body and an ash storage box is provided at the lower part, and a furnace cover is provided above the furnace body; the feeding barrel extends through the side wall of the furnace body into the furnace; the lower air duct extends downward into the ash storage box, and the lower air duct is located in the furnace wall of the furnace body; the flue is connected to the furnace cover. In this device, when the feeding barrel is connected to the side wall of the furnace body, some parts are prone to deformation under the heat environment, causing the feeding barrel as a whole to be unable to connect normally with the side wall of the furnace body, and in the process of the biomass fuel entering the furnace body through the feeding barrel, there is no device to prevent the flame from spilling out, and the flame is prone to backflow along the feeding barrel after long-term operation, causing danger. Utility Model Content

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described below.

[0004] Another object of the utility model is to provide a hot air furnace for grain drying, which can provide a water-cooled interlayer and a water-cooled interlayer II to perform real-time cooling treatment on the furnace body and the material guide trough to protect the feed barrel; the provision of the material guide trough can also prevent the flame from flowing back along the material guide trough, further protect the feed barrel, maintain the overall structural stability, and extend the service life of the hot air furnace for grain drying.

[0005] In order to achieve these purposes and other advantages according to the utility model, a hot air furnace for grain drying is provided, comprising:

[0006] The furnace body comprises a furnace; a water-cooled interlayer arranged in the side wall of the furnace body; a feed port arranged on the side wall of the furnace body; an inner furnace, which is a cylindrical structure, the inner furnace is coaxially and vertically arranged in the furnace, the height of the inner furnace is less than the height of the furnace, and the outer wall of the inner furnace does not contact the inner wall of the furnace; a feed port II is arranged on the side wall of the inner furnace, and the feed port II is arranged corresponding to the feed port; an air outlet is arranged on the side wall of the furnace body, and the air outlet is connected to the furnace;

[0007] A feed cylinder, one end of which extends from the feed port into the furnace;

[0008] A material guide trough is obliquely arranged in the furnace body, one end of the material guide trough is arranged on the inner side wall of the furnace, the other end of the material guide trough extends from the feed port II into the inner furnace, and the material guide trough is located directly below the feed tube, and the opening width of the material guide trough is greater than the diameter of the feed tube; a water-cooled interlayer II is arranged in the side wall of the material guide trough, and the water-cooled interlayer II is connected to the water-cooled interlayer;

[0009] at least one air inlet pipe, the air outlet end of which is arranged at the bottom of the inner furnace;

[0010] The ash removal chamber is arranged at the bottom of the furnace body, and the top of the ash removal chamber is connected with the furnace and the inner furnace.

[0011] Preferably, it further comprises: a flow divider hood I and a flow divider hood II, whose openings are downwardly arranged at the top of the furnace, and the flow divider hood I and the flow divider hood II are arranged to be mutually nested; the diameter of the opening of the flow divider hood I located on the outside is larger than the opening diameter of the upper end of the inner furnace, and the flow divider hood I and the flow divider hood II do not contact the upper end of the inner furnace;

[0012] A plurality of flow diversion holes are evenly distributed on the flow diversion cover I and the flow diversion cover II, and the plurality of flow diversion holes on the flow diversion cover I and the plurality of flow diversion holes on the flow diversion cover II are staggered.

[0013] Preferably, any diversion hole is an elongated hole, and the elongated hole is extended along the axial direction of the furnace body.

[0014] Preferably, it further comprises: a heat exchanger, which comprises a shell; a partition, which is transversely arranged in the shell to divide the shell into a heat exchange chamber I and a heat exchange chamber II;

[0015] A plurality of heat exchange tubes I are evenly spaced and arranged in the shell, and the plurality of heat exchange tubes I penetrate the partition and extend in the heat exchange chamber I and the heat exchange chamber II, and the gas outlet ends of the plurality of heat exchange tubes I are connected to the grain dryer;

[0016] The water inlet pipe and the water outlet pipe, one end of which is connected to the heat exchange chamber I respectively, and the water inlet pipe and the water outlet pipe are distributed diagonally, and the other end of the water inlet pipe and the other end of the water outlet pipe are connected to the water cooling interlayer respectively;

[0017] One end of the air inlet pipe and the air outlet pipe are respectively connected to the heat exchange chamber II, and the air inlet pipe and the air outlet pipe are distributed diagonally, and the other end of the air inlet pipe is connected to the air outlet of the furnace body.

[0018] Preferably, the distance between the outer wall of the inner furnace and the inner wall of the furnace is less than one fifth of the cross-sectional diameter of the furnace; and the lower edge of the air outlet is not lower than the upper edge of the inner furnace.

[0019] Preferably, three air inlet pipes are evenly distributed at the bottom of the inner furnace, and in the horizontal direction, the air inlets of the three air inlet pipes form an angle of less than 30° with the inner wall of the inner furnace.

[0020] The utility model at least has the following beneficial effects:

[0021] The furnace of the furnace body is divided into an inner furnace, the installation place of the feed tube and the feed port is separated from the high-temperature combustion area in the inner furnace, and a water-cooling interlayer is set in the side wall of the furnace body to effectively cool the furnace body, the feed port and the feed tube, maintain structural stability, and extend the service life of the equipment;

[0022] The guide trough is used to guide the biomass fuel in the feed barrel into the inner furnace. Since the guide trough is open, it can effectively prevent the flame from flowing back along the guide trough. The water-cooled interlayer II is connected to the water-cooled interlayer, and the guide trough can be cooled at any time to avoid it from being burned and damaged, thereby extending its service life.

[0023] In summary, the hot air furnace for grain drying provided by the utility model can perform real-time cooling treatment on the furnace body and the material guide chute by arranging a water-cooling interlayer and a water-cooling interlayer II to protect the feed barrel; the arrangement of the material guide chute can also prevent the flame from flowing back along the material guide chute, further protect the feed barrel, maintain the stability of the overall structure, and extend the service life of the hot air furnace for grain drying.

[0024] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic cross-sectional structure diagram of a hot air furnace for grain drying described in one embodiment of the utility model;

[0026] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of part A;

[0027] Figure 3 It is a schematic cross-sectional structure diagram of the feed port II described in one embodiment of the utility model;

[0028] Figure 4 This is a schematic cross-sectional view of a hot air furnace for grain drying in another embodiment of the utility model;

[0029] Figure 5 It is a structural schematic diagram of the cross section of the splitter cover I and the splitter cover II in one embodiment of the utility model;

[0030] Figure 6 It is a front view structural schematic diagram of the splitter cover II described in one embodiment of the utility model;

[0031] Figure 7It is a schematic cross-sectional structure diagram of a heat exchanger in one embodiment of the utility model;

[0032] Figure 8 It is a structural schematic diagram of a cross section near the bottom of the inner furnace in one embodiment of the utility model. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0034] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0035] like Figure 1 , 2 As shown in , 3, the utility model provides a hot air furnace for grain drying, comprising:

[0036] The furnace body 1 comprises a furnace 10; a water-cooled interlayer 11, which is arranged in the side wall of the furnace body; a feed port 12, which is arranged on the side wall of the furnace body; an inner furnace 30, which is a cylindrical structure, the inner furnace is coaxially and vertically arranged in the furnace, the height of the inner furnace is less than the height of the furnace, and the outer wall of the inner furnace does not contact the inner wall of the furnace; a feed port II 301, which is arranged on the side wall of the inner furnace, and the feed port II is arranged corresponding to the feed port; an air outlet 13, which is arranged on the side wall of the furnace body, and the air outlet is connected to the furnace;

[0037] A feed cylinder 40, one end of which extends from the feed port into the furnace;

[0038] The guide trough 50 is a long strip trough body, which is obliquely arranged in the furnace body, one end of the guide trough is arranged on the inner wall of the furnace, and the other end of the guide trough extends from the feed port II into the inner furnace, and the guide trough is located directly below the feed tube, and the opening width of the guide trough is greater than the diameter of the feed tube; the water-cooled interlayer II 501 is arranged in the side wall of the guide trough, and the water-cooled interlayer II is connected to the water-cooled interlayer;

[0039] At least one air inlet pipe 60, the air outlet end of which is arranged at the bottom of the inner furnace; an igniter is arranged at the bottom of the furnace body, and cooperates with the at least one air inlet pipe for ignition;

[0040] The ash removal chamber 14 is arranged at the bottom of the furnace body, and the top of the ash removal chamber is connected with the furnace and the inner furnace, and a grate is arranged between the ash removal chamber and the furnace and the inner furnace.

[0041] In this scheme, the furnace of the furnace body is further divided into an inner furnace, the installation position of the feed tube and the feed port is separated from the high-temperature combustion zone in the inner furnace, and a water-cooling interlayer is arranged in the side wall of the furnace body to effectively cool the furnace body, the feed port and the feed tube, maintain structural stability, and extend the service life of the equipment;

[0042] The guide trough is used to guide the biomass fuel in the feed barrel into the inner furnace. Since the guide trough is open, it can effectively prevent the flame from flowing back along the guide trough. The water-cooled interlayer II is connected to the water-cooled interlayer, and the guide trough can be cooled at any time to avoid it from being burned and damaged, thereby extending its service life.

[0043] In this scheme, the furnace body and the material guide chute are cooled in real time by setting up a water-cooling interlayer and a water-cooling interlayer II. The setting of the material guide chute can also prevent the flame from flowing back along the material guide chute, further protecting the feed barrel to maintain structural stability and extend the service life of the equipment.

[0044] like Figure 4 , 5 As shown, in a preferred solution, it also includes: a diverter hood Ⅰ 70 and a diverter hood Ⅱ 80, whose openings are set downward at the top of the furnace, and the diverter hood Ⅰ and the diverter hood Ⅱ are set mutually; the diameter of the opening of the diverter hood Ⅰ located on the outside is larger than the opening diameter of the upper end of the inner furnace, and the diverter hood Ⅰ and the diverter hood Ⅱ are not in contact with the upper end of the inner furnace; multiple diverter holes, which are evenly distributed on the diverter hood Ⅰ and the diverter hood Ⅱ, and the multiple diverter holes 701 on the diverter hood Ⅰ and the multiple diverter holes 801 on the diverter hood Ⅱ are staggered. In this solution, the diverter hood Ⅰ and the diverter hood Ⅱ cooperate with multiple diverter holes to divide and mix the rising hot air, so that it can be fully mixed and then discharged from the furnace body to avoid excessive local temperature. In addition, when the hot air passes through the diverter hood Ⅰ and the diverter hood Ⅱ, it can collide with the side walls of the diverter hood Ⅰ and the diverter hood Ⅱ and the hole walls of the multiple diverter holes, which can separate most of the ash therein and effectively clean the hot air.

[0045] like Figure 6 As shown, in a preferred embodiment, any diversion hole is a long strip hole, and the long strip hole is arranged along the axial direction of the furnace body. The evenly distributed long strip holes can reduce the process difficulty, and at the same time, increase the ventilation volume, and do not affect the hot air outlet efficiency on the basis of ensuring the mixing of hot air and ash removal.

[0046] like Figure 7As shown, in a preferred embodiment, it also includes: a heat exchanger 90, which includes a shell; a partition 901, which is transversely arranged in the shell to divide the shell into a heat exchange chamber I 902 and a heat exchange chamber II 903; a plurality of heat exchange tubes I 904, which are evenly spaced and arranged in the shell, and a plurality of heat exchange tubes I penetrate the partition and extend to the heat exchange chamber I and the heat exchange chamber II, the outlet ends of the plurality of heat exchange tubes I are connected to the grain dryer, and the inlet ends of the plurality of heat exchange tubes are close to the heat exchange chambers. Ⅰ is set, and the outlet ends of multiple heat exchange tubes are set close to heat exchange chamber Ⅱ; the water inlet pipe 905 and the water outlet pipe 906, one end of which is connected to heat exchange chamber Ⅰ respectively, and the water inlet pipe and the water outlet pipe are diagonally distributed, and the other end of the water inlet pipe and the other end of the water outlet pipe are connected to the water-cooled interlayer respectively; the air inlet pipe 907 and the air outlet pipe 908, one end of which is connected to heat exchange chamber Ⅱ respectively, and the air inlet pipe and the air outlet pipe are diagonally distributed, and the other end of the air inlet pipe is connected to the air outlet of the furnace body. The heat exchanger is used to transfer the heat energy in the water of the water-cooled interlayer, the water-cooled interlayer Ⅱ and the heat energy of the hot air of the hot air furnace to the cold air, and then the cold air is heated to a certain temperature and used for the drying operation of the grain dryer. In the hot air furnace, the waste heat of the hot air furnace absorbed by the hot air and water can be fully utilized to effectively reduce the waste of heat energy.

[0047] In a preferred solution, the distance between the outer wall of the inner furnace and the inner wall of the furnace is less than one fifth of the cross-sectional diameter of the furnace; the lower edge of the gas outlet is not lower than the upper edge of the inner furnace. Avoid the inner furnace blocking the gas outlet to ensure smooth gas outlet, and the distance between the outer wall of the inner furnace and the inner wall of the furnace is wide enough to buffer the hot gas and assist the ash powder to fall back to the ash removal bin.

[0048] like Figure 8 As shown, in a preferred embodiment, three air inlet pipes are evenly distributed at the bottom of the inner furnace, and in the horizontal direction, the air inlets of the three air inlet pipes are respectively at an angle of less than 30° with the inner wall of the inner furnace. In this embodiment, the three evenly distributed air inlet pipes can form a clockwise or counterclockwise rotating wind in the inner furnace, ensuring that the biomass material in the inner furnace is fully contacted with oxygen and burned, so as to fully release heat energy and reduce the generation of combustible gas.

[0049] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A hot air furnace for grain drying, characterized in that: include: A furnace body, comprising a furnace chamber; a water-cooled interlayer, which is arranged in the side wall of the furnace body; A feed port is provided on the side wall of the furnace body; an inner furnace is a cylindrical structure, the inner furnace is coaxially and vertically provided in the furnace, the height of the inner furnace is less than the height of the furnace, and the outer wall of the inner furnace does not contact the inner wall of the furnace; a feed port II is provided on the side wall of the inner furnace, and the feed port II is provided correspondingly to the feed port; an air outlet is provided on the side wall of the furnace body, and the air outlet is connected to the furnace; A feed cylinder, one end of which extends from the feed port into the furnace; A material guide trough is obliquely arranged in the furnace body, one end of the material guide trough is arranged on the inner side wall of the furnace, the other end of the material guide trough extends from the feed port II into the inner furnace, and the material guide trough is located directly below the feed tube, and the opening width of the material guide trough is greater than the diameter of the feed tube; a water-cooled interlayer II is arranged in the side wall of the material guide trough, and the water-cooled interlayer II is connected to the water-cooled interlayer; at least one air inlet pipe, the air outlet end of which is arranged at the bottom of the inner furnace; The ash removal chamber is arranged at the bottom of the furnace body, and the top of the ash removal chamber is connected with the furnace and the inner furnace.

2. The hot air furnace for grain drying according to claim 1, characterized in that: Also includes: The splitter hood I and the splitter hood II have openings arranged downward at the top of the furnace, and the splitter hood I and the splitter hood II are arranged to be mutually nested; the diameter of the opening of the splitter hood I located on the outside is larger than the opening diameter of the upper end of the inner furnace, and the splitter hood I and the splitter hood II do not contact the upper end of the inner furnace; A plurality of flow diversion holes are evenly distributed on the flow diversion cover I and the flow diversion cover II, and the plurality of flow diversion holes on the flow diversion cover I and the plurality of flow diversion holes on the flow diversion cover II are staggered.

3. The hot air furnace for grain drying according to claim 2, characterized in that: Any diversion hole is a long strip hole, and the long strip hole is extended along the axial direction of the furnace body.

4. The hot air furnace for grain drying according to claim 1, characterized in that: Also includes: The heat exchanger comprises a shell; a partition plate is transversely arranged in the shell to divide the shell into a heat exchange chamber I and a heat exchange chamber II; A plurality of heat exchange tubes I are evenly spaced and arranged in the shell, and the plurality of heat exchange tubes I penetrate the partition and extend in the heat exchange chamber I and the heat exchange chamber II, and the gas outlet ends of the plurality of heat exchange tubes I are connected to the grain dryer; The water inlet pipe and the water outlet pipe, one end of which is connected to the heat exchange chamber I respectively, and the water inlet pipe and the water outlet pipe are distributed diagonally, and the other end of the water inlet pipe and the other end of the water outlet pipe are connected to the water cooling interlayer respectively; One end of the air inlet pipe and the air outlet pipe are respectively connected to the heat exchange chamber II, and the air inlet pipe and the air outlet pipe are distributed diagonally, and the other end of the air inlet pipe is connected to the air outlet of the furnace body.

5. The hot air furnace for grain drying according to claim 1, characterized in that: The distance between the outer wall of the inner furnace and the inner wall of the furnace is less than one fifth of the cross-sectional diameter of the furnace; The lower edge of the air outlet is not lower than the upper edge of the inner furnace.

6. The hot air furnace for grain drying according to claim 1, characterized in that: Three air inlet pipes are evenly distributed at the bottom of the inner furnace. In the horizontal direction, the air inlets of the three air inlet pipes form an angle less than 30° with the inner wall of the inner furnace.

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