Negative pressure type grain drying machine combining cyclone dust removal and sedimentation type dust removal

Abstract

The utility model discloses a negative pressure type grain dryer combining cyclone dust removal and sedimentation type dust removal, which comprises a drying tower comprising a high-temperature drying bin, a low-temperature drying bin, a tempering bin and a cooling bin which are sequentially arranged from top to bottom; a high-temperature hot air pipe; a negative pressure fan I; a cyclone separator I; a negative pressure fan II; and a cyclone separator II. According to the negative pressure type grain dryer combining cyclone dust removal and sedimentation type dust removal, the negative pressure fan I, the cyclone separator I, the negative pressure fan II and the cyclone separator II are effectively matched with the drying tower, so that heat energy is fully utilized to circularly dry grains, and meanwhile, the dust removal efficiency is improved; and a large amount of dust generated in the grain drying process is effectively removed, and the environment is protected.

Description

Technical Field

[0001] The utility model relates to a negative pressure grain drying machine which combines cyclone dust removal with sedimentation dust removal. Background Art

[0002] Grain dryers produce a lot of dust during drying, which causes great pollution to the environment.

[0003] Chinese patent No. 201821208037.3 discloses an induced draft negative pressure energy-saving grain dryer, comprising a base (1), characterized in that: a first elevator (5) is fixedly connected to one side of the top of the base (1), one side of the first elevator (5) is connected to a cylindrical primary cleaning screen (3) fixedly connected to the base (1), a side of the cylindrical primary cleaning screen (3) away from the first elevator (5) is connected to a second elevator (7) fixedly connected to the base (1), and a side of the second elevator (7) away from the cylindrical primary cleaning screen (3) is connected to a dryer main unit (18) fixedly connected to the base (1). ), the main dryer (18) is provided with an air inlet pipe (12) on a side away from the second elevator (7), the outer wall of the air inlet pipe (12) is connected to an induced draft fan (17), the other end of the air inlet pipe (12) is connected to a filter (16) fixedly connected to the base (1), the filter (16) is connected to a chain furnace (14) on a side away from the main dryer (18), the top of the chain furnace (14) is fixedly connected to a heat exchanger (13), the heat exchanger (13) is connected to the filter (16), and the heat exchanger (13) is connected to the main dryer (18) through an exhaust pipe (11). The induced draft negative pressure energy-saving grain dryer filters the raw materials using a cylindrical primary cleaning screen to prevent the entry of larger debris. However, it does not perform a second dust removal treatment on the air with a lot of dust discharged from the exhaust pipe (11), which is likely to cause great pollution to the environment. Utility Model Content

[0004] 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.

[0005] Another object of the utility model is to provide a negative pressure grain dryer which combines cyclone dust removal with sedimentation dust removal, by which the negative pressure fan I, cyclone separator I, negative pressure fan II and cyclone separator II are effectively coordinated with the drying tower, so as to ensure full utilization of heat energy for cyclic drying of grain and effectively remove a large amount of dust generated in the process of drying grain, thereby protecting the environment.

[0006] In order to achieve these purposes and other advantages according to the utility model, a negative pressure grain dryer combining cyclone dust removal and sedimentation dust removal is provided, comprising:

[0007] The drying tower comprises a high-temperature drying chamber, a low-temperature drying chamber, a slow drying chamber and a cooling chamber which are arranged in sequence from top to bottom;

[0008] A high-temperature hot air duct connected to the air inlet I of the high-temperature drying chamber;

[0009] A negative pressure fan I, whose air inlet I is connected to the air outlet I of the high-temperature drying chamber through an air outlet settling channel, and the air outlet settling channel is a funnel-shaped channel, and the upper end of the funnel-shaped channel is buckled on the side wall of the high-temperature drying chamber where the air outlet I is provided;

[0010] The air inlet end I of the cyclone separator I is connected to the air outlet I of the negative pressure fan I, and the air outlet end I of the cyclone separator I is connected to the air inlet II of the low-temperature drying bin through the low-temperature air duct;

[0011] The air inlet II of the negative pressure fan II is connected to the air outlet I of the low-temperature drying chamber through the air outlet settling channel II; the air outlet II of the negative pressure fan II is connected to the air inlet III of the cooling chamber through the cold air pipe;

[0012] The air inlet end II of the cyclone separator II is connected to the air outlet III of the cooling bin, and the air outlet end II of the cyclone separator II is connected to the exhaust pipe.

[0013] Preferably, it also includes: a low-temperature wind hood, which is arranged on the air inlet II of the low-temperature drying chamber, and the low-temperature air duct is connected to the low-temperature wind hood; a low-temperature air duct II, one end of which is connected to the low-temperature wind hood, and the other end of the low-temperature air duct II is connected to the low-temperature hot air duct, and the air supply temperature of the low-temperature hot air duct is lower than that of the high-temperature hot air duct.

[0014] Preferably, it further comprises: a cold air duct II, one end of which is connected to the cold air duct, and the other end of which is connected to the cold air blower.

[0015] Preferably, the volume ratio of the high-temperature drying chamber, the low-temperature drying chamber, the slow drying chamber and the cooling chamber is 1:1:2:1-1:1:4:1.

[0016] Preferably, it further comprises: a heat-insulating layer, which is arranged on the side wall of the air outlet and settling channel.

[0017] Preferably, it also includes: a dust hopper, which is a barrel body with a funnel-shaped structure, the dust hopper is arranged between the air outlet sedimentation pipe and the negative pressure fan I, and the inlet arranged at the upper end of the dust hopper is connected to the air outlet sedimentation pipe, and the outlet arranged on the side wall of the dust hopper is connected to the negative pressure fan I, and the dust collecting bin at the bottom of the dust hopper is arranged at a height relatively lower than the air inlet I of the negative pressure fan I.

[0018] The utility model at least has the following beneficial effects:

[0019] The air with waste heat after the high-temperature drying chamber contains a large amount of dust and water vapor. First, it is treated by the initial sedimentation in the air outlet sedimentation pipeline to remove some larger dust particles. After that, it is quickly guided by the negative pressure of the negative pressure fan I and enters the cyclone separator I, thereby effectively removing a large amount of dust and water vapor in the air.

[0020] After that, the air with residual heat after effective dust removal and dehumidification enters the low-temperature drying chamber through the low-temperature air duct, and further utilizes the residual heat to carry out low-temperature drying of the grain, thereby improving the grain drying efficiency and avoiding heat energy waste;

[0021] After the waste heat is fully utilized, the air is discharged from the low-temperature drying chamber and quickly circulates to the cooling chamber under the negative pressure of the negative pressure fan II to cool the grain, thereby saving wind energy and avoiding waste.

[0022] The air that flows through the low-temperature drying chamber and the cooling chamber in sequence will carry a small amount of dust and water vapor again. The cyclone separator II is used to remove dust and dehumidify this part of the air again, and finally discharge the clean air to effectively avoid polluting the environment.

[0023] In summary, the negative pressure grain dryer provided by the utility model which combines cyclone dust removal with sedimentation dust removal effectively cooperates with the drying tower through the arranged negative pressure fan I, cyclone separator I, negative pressure fan II and cyclone separator II. While ensuring full utilization of thermal energy for cyclic drying of grain, it also effectively removes a large amount of dust generated in the process of drying grain, thereby protecting the environment.

[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 structural schematic diagram of a negative pressure grain dryer that combines cyclone dust removal with sedimentation dust removal in one embodiment of the utility model;

[0026] Figure 2 It is a side view structural schematic diagram of a drying tower in one embodiment of the utility model;

[0027] Figure 3 This is a side structural schematic diagram of a drying tower in another embodiment of the utility model;

[0028] Figure 4 It is a structural schematic diagram of a negative pressure grain drying machine combining cyclone dust removal and sedimentation dust removal as described in another embodiment of the utility model, wherein a cold air pipe II is added;

[0029] Figure 5This is a schematic structural diagram of a negative pressure grain dryer that combines cyclone dust removal with sedimentation dust removal as described in yet another embodiment of the utility model, wherein an additional dust collecting hopper is shown. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] like Figure 1 , 2 As shown, the utility model provides a negative pressure grain dryer which adopts cyclone dust removal and sedimentation dust removal, including: a drying tower 10, which includes a high temperature drying chamber 101, a low temperature drying chamber 102, a slow thawing chamber 103 and a cooling chamber 104 arranged in sequence from top to bottom; the grain can be dried at high temperature, dried at low temperature with large air volume, and kept warm for a certain period of time in sequence, and then cooled by cold air, so that the moisture content of the grain changes more steadily, the cracking rate is prevented from increasing, and the quality of the grain is improved; the upper end of the drying tower is fed with the grain that has been preliminarily cleaned by the elevator; the high temperature hot air pipe 20 is connected to the air inlet I of the high temperature drying chamber; the negative pressure fan I30, the air inlet I of which passes through the air outlet sedimentation channel 10 11 is connected to the air outlet Ⅰ of the high-temperature drying bin, the air outlet settling channel is a funnel-shaped channel, and the upper end of the funnel-shaped channel is buckled on the side wall of the high-temperature drying bin provided with the air outlet Ⅰ; the cyclone separator Ⅰ40, its air inlet end Ⅰ is connected to the air outlet Ⅰ of the negative pressure fan Ⅰ, and the air outlet end Ⅰ of the cyclone separator Ⅰ is connected to the air inlet Ⅱ of the low-temperature drying bin through the low-temperature air duct 1021; the negative pressure fan Ⅱ50, its air inlet Ⅱ is connected to the air outlet Ⅰ of the low-temperature drying bin through the air outlet settling channel Ⅱ1022; the air outlet Ⅱ of the negative pressure fan Ⅱ is connected to the air inlet Ⅲ of the cooling bin through the cold air duct 1041; the cyclone separator Ⅱ60, its air inlet end Ⅱ is connected to the air outlet Ⅲ of the cooling bin, and the air outlet end Ⅱ of the cyclone separator Ⅱ is connected to the exhaust pipe.

[0033] In this scheme, the air with waste heat that has passed through the high-temperature drying chamber contains a large amount of dust and water vapor. First, it undergoes preliminary sedimentation treatment in the air outlet sedimentation pipeline to remove some of the larger particles of dust. After that, it is quickly guided by the negative pressure of the negative pressure fan I into the cyclone separator I, thereby effectively removing a large amount of dust and water vapor contained in the air.

[0034] After that, the air with residual heat after effective dust removal and dehumidification enters the low-temperature drying chamber through the low-temperature air duct, and further utilizes the residual heat to carry out low-temperature drying of the grain, thereby improving the grain drying efficiency and avoiding heat energy waste;

[0035] After the waste heat is fully utilized, the air is discharged from the low-temperature drying chamber and quickly circulates to the cooling chamber under the negative pressure of the negative pressure fan II to cool the grain, thereby saving wind energy and avoiding waste.

[0036] The air that flows through the low-temperature drying chamber and the cooling chamber in sequence will carry a small amount of dust and water vapor again. The cyclone separator II is used to remove dust and dehumidify this part of the air again, and finally discharge the clean air to effectively avoid polluting the environment.

[0037] In summary, the negative pressure grain dryer provided by the utility model which combines cyclone dust removal with sedimentation dust removal effectively cooperates with the drying tower through the arranged negative pressure fan I, cyclone separator I, negative pressure fan II and cyclone separator II. While ensuring full utilization of thermal energy for cyclic drying of grain, it also effectively removes a large amount of dust generated in the process of drying grain, thereby protecting the environment.

[0038] like Figure 3 As shown, in a preferred embodiment, it also includes: a low-temperature wind hood 105, which is set on the air inlet II of the low-temperature drying warehouse, and the low-temperature wind duct is connected to the low-temperature wind hood; a low-temperature wind duct II 1022, one end of which is connected to the low-temperature wind hood, and the other end of the low-temperature wind duct II is connected to the low-temperature hot air duct, and the air supply temperature of the low-temperature hot air duct is lower than that of the high-temperature hot air duct. The low-temperature wind duct II is used to provide independent low-temperature wind for the low-temperature drying warehouse. In the case of insufficient or stopped air supply from the low-temperature wind duct, low-temperature wind can also be supplied to the low-temperature drying warehouse alone to perform low-temperature drying operations with a large air volume.

[0039] like Figure 4 As shown, in a preferred embodiment, it also includes: a cold air pipe II 80, one end of which is connected to the cold air pipe, and the other end is connected to the cold air blower. The cold air pipe II is used to replenish the cold air pipe, or to supply low-temperature air to further cool the air in the cold air pipe to meet the air intake and temperature requirements of the cooling bin.

[0040] In a preferred embodiment, the volume ratio of the high-temperature drying chamber, the low-temperature drying chamber, the slow drying chamber and the cooling chamber is 1:1:2:1-1:1:4:1.

[0041] In a preferred embodiment, the invention further comprises: a heat preservation layer, which is arranged on the side wall of the air outlet settling channel. The heat preservation layer is used to maintain the air temperature in the air outlet settling channel to avoid excessive loss of residual heat and waste of heat energy.

[0042] like Figure 5As shown, in a preferred embodiment, it also includes: a dust hopper 90, which is a barrel body with a funnel-shaped structure. The dust hopper is arranged between the air outlet settling pipe and the negative pressure fan I, and the inlet arranged at the upper end of the dust hopper is connected to the air outlet settling pipe, and the outlet arranged on the side wall of the dust hopper is connected to the negative pressure fan I. The dust collecting bin at the bottom of the dust hopper is arranged at a height relatively lower than the air inlet I of the negative pressure fan I. The dust hopper is used to initially collect dust settled in the air outlet settling channel, and then the dust outlet at the lower end of the dust hopper can be opened regularly to discharge dust.

[0043] 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 negative pressure grain dryer combining cyclone dust removal and sedimentation dust removal, characterized in that: include: The drying tower comprises a high-temperature drying chamber, a low-temperature drying chamber, a slow drying chamber and a cooling chamber which are arranged in sequence from top to bottom; A high-temperature hot air duct connected to the air inlet I of the high-temperature drying chamber; A negative pressure fan I, whose air inlet I is connected to the air outlet I of the high-temperature drying chamber through an air outlet settling channel, and the air outlet settling channel is a funnel-shaped channel, and the upper end of the funnel-shaped channel is buckled on the side wall of the high-temperature drying chamber where the air outlet I is provided; The air inlet end I of the cyclone separator I is connected to the air outlet I of the negative pressure fan I, and the air outlet end I of the cyclone separator I is connected to the air inlet II of the low-temperature drying bin through the low-temperature air duct; Negative pressure fan II, whose air inlet II is connected to the air outlet I of the low-temperature drying chamber through the air outlet settling channel II; The air outlet II of the negative pressure fan II is connected to the air inlet III of the cooling bin through the cold air duct; The air inlet end II of the cyclone separator II is connected to the air outlet III of the cooling bin, and the air outlet end II of the cyclone separator II is connected to the exhaust pipe.

2. The negative pressure grain dryer combining cyclone dust removal and sedimentation dust removal as claimed in claim 1 is characterized in that: Also includes: A low-temperature air hood is provided on the air inlet II of the low-temperature drying chamber, and a low-temperature air duct is connected to the low-temperature air hood; One end of the low temperature air duct II is connected to the low temperature air hood, and the other end of the low temperature air duct II is connected to the low temperature hot air duct. The air supply temperature of the low temperature hot air duct is lower than that of the high temperature hot air duct.

3. The negative pressure grain dryer combining cyclone dust removal and sedimentation dust removal as claimed in claim 1, characterized in that: Also includes: One end of the cold air duct II is connected to the cold air duct, and the other end is connected to the cold air blower.

4. The negative pressure grain dryer combining cyclone dust removal and sedimentation dust removal as claimed in claim 1, characterized in that: The volume ratio of the high temperature drying chamber, low temperature drying chamber, slow recovery chamber and cooling chamber is 1:1:2:1-1:1:4:

1.

5. The negative pressure grain dryer combining cyclone dust removal and sedimentation dust removal as claimed in claim 1, characterized in that: Also includes: The heat-insulating layer is arranged on the side wall of the air outlet and settling channel.

6. The negative pressure grain dryer combining cyclone dust removal and sedimentation dust removal as claimed in claim 1, characterized in that: Also includes: The dust hopper is a barrel body with a funnel-shaped structure. The dust hopper is arranged between the air outlet settling pipe and the negative pressure fan I, and the inlet arranged at the upper end of the dust hopper is connected to the air outlet settling pipe, and the outlet arranged on the side wall of the dust hopper is connected to the negative pressure fan I. The dust collecting bin at the bottom of the dust hopper is arranged at a height relatively lower than the air inlet I of the negative pressure fan I.

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