Rice hull combustion recycling drying equipment

Abstract

This application relates to a rice husk combustion and recycling drying device, comprising: a combustion furnace and a drying chamber. The combustion furnace includes a biomass buffer chamber and a combustion chamber that are interconnected. An ash chamber connected to the combustion chamber is located inside the combustion furnace. A grate is located above the ash chamber inside the combustion furnace. A heat exchange chamber connected to the combustion chamber is located above the combustion furnace. An igniter is installed on the combustion furnace to ignite the rice husks inside the combustion chamber. A heat exchanger is installed inside the heat exchange chamber. The heat exchanger has a heat exchange channel for heating air. This application, through the coordinated use of the biomass buffer chamber, combustion chamber, ash chamber, heat exchange chamber, and igniter, fully utilizes the rice husks generated during rice processing, burning them as fuel to provide heat energy for the drying process, thus avoiding resource waste caused by the indiscriminate disposal or inefficient use of rice husks.

Description

Technical Field

[0001] This application relates to the field of rice drying technology, and in particular to a rice husk combustion and recycling drying device. Background Technology

[0002] In the post-harvest processing of rice, the rice itself has a high moisture content. If it is not dried in time, it is very easy to mold and sprout. In order to ensure the quality and storage safety of rice, it is necessary to carry out effective drying treatment.

[0003] Currently, most rice drying equipment on the market relies on traditional energy supply methods, such as coal, natural gas, or electricity.

[0004] During rice processing, a large amount of rice husks are produced as a byproduct. For every 100 kilograms of rice harvested, about 20 kilograms of rice husks are produced. Currently, the methods for processing these rice husks are mostly quite simple. To make full use of them, rice husks contain abundant energy and have a high calorific value, making them a potential high-quality biomass energy source. The heat generated by burning them can be used for rice drying, which can not only solve the problem of rice husk disposal and realize the resource utilization of waste, but also reduce dependence on traditional energy sources and lower drying costs.

[0005] To address the aforementioned issues, a rice husk combustion and recycling drying device has been designed. Utility Model Content

[0006] This application provides a rice husk combustion and recycling drying device to solve the problem in related technologies where rice husks generated during rice processing are not fully utilized for drying rice.

[0007] Firstly, a rice husk combustion and recycling drying device is provided, comprising:

[0008] The combustion furnace and drying chamber are provided. The combustion furnace includes a biomass buffer chamber and a combustion chamber that are interconnected. The combustion furnace is provided with an ash chamber that is connected to the combustion chamber. The combustion chamber is provided with a grate located above the ash chamber. A heat exchange chamber that is connected to the combustion chamber is provided above the combustion furnace. An igniter is provided on the combustion furnace. The igniter is used to ignite the rice husks inside the combustion chamber. A heat exchanger is provided inside the heat exchange chamber.

[0009] The heat exchanger has a heat exchange channel for heating air. An air supply unit is provided at one end of the heat exchange channel, and a hot air outlet pipe is provided at the other end of the heat exchange channel. The other end of the hot air outlet pipe is connected to the drying chamber to supply hot air into the drying chamber.

[0010] In some embodiments, the ash chamber is located at the bottom of the combustion chamber, and a funnel located at the bottom of the grate is provided on the ash chamber to guide the slag after combustion into the ash chamber.

[0011] In some embodiments, the combustion furnace is provided with an air supply pipe located at the bottom of the grate, one end of the air supply pipe is connected to the bottom of the combustion chamber, and a filter screen is provided at the end of the air supply pipe connected to the combustion chamber.

[0012] A blower is installed at the other end of the air supply pipe.

[0013] In some embodiments, the combustion furnace is provided with a feed port, which is connected to the biomass buffer chamber. A flow guide is provided inside the biomass buffer chamber, with the end of the flow guide near the combustion chamber tilted downwards. The flow guide is used to introduce rice husks from the biomass buffer chamber into the combustion chamber.

[0014] In some embodiments, a flue pipe is provided above the heat exchange chamber.

[0015] In some embodiments, the heat exchanger includes a plurality of metal plates arranged sequentially along the length of the combustion furnace. The metal plates have cavities inside, and two adjacent cavities are connected by a plurality of flow pipes. The two adjacent flow pipes are located on the upper and lower sides of the metal plates, and the plurality of cavities and the plurality of flow pipes form a heat exchange channel.

[0016] In some embodiments, the air supply unit includes a fan, the air outlet of which is connected to the leftmost cavity via a pipe;

[0017] The hot air outlet pipe includes a main pipe that communicates with the rightmost cavity. The other end of the main pipe extends to the outside of the combustion furnace. The other end of the main pipe is connected to multiple branch pipes, and the other end of the branch pipes is connected to the drying chamber.

[0018] In some embodiments, the drying chamber has a rice drying chamber inside, a feeding hopper communicating with the chamber is provided above the drying chamber, a discharge port for discharging material is provided at the bottom of the drying chamber, and an exhaust pipe is provided on the drying chamber.

[0019] This application provides a rice husk combustion and reuse drying device. By using a biomass buffer chamber, combustion chamber, ash chamber, heat exchange chamber and igniter in combination, it makes full use of the rice husks generated during rice processing and uses them as fuel to provide heat energy for the drying process. This avoids the waste of resources caused by the random disposal or inefficient use of rice husks. At the same time, by using free rice husks as fuel, it greatly reduces the energy cost of the drying process.

[0020] The heat exchanger enables effective heat exchange between the high-temperature flue gas generated by combustion and the air to be heated, which can quickly heat the air to the required temperature and supply it stably to the drying chamber in the form of hot gas, ensuring a stable temperature inside the drying chamber and improving drying efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A three-dimensional structural schematic diagram provided for an embodiment of this application;

[0023] Figure 2 This is a front sectional view of the combustion furnace provided in an embodiment of this application;

[0024] Figure 3 This is a front sectional view of the drying chamber provided in an embodiment of this application;

[0025] Figure 4 This is a front sectional view of a heat exchanger provided in an embodiment of this application.

[0026] In the diagram: 1. Combustion furnace; 2. Drying chamber; 3. Biomass buffer chamber; 4. Combustion chamber; 5. Ash chamber; 6. Grate; 7. Heat exchange chamber; 8. Igniter; 9. Heat exchanger; 91. Heat exchange channel; 92. Metal plate; 93. Cavity; 94. Flow pipe; 95. Air supply unit; 96. Hot air outlet pipe; 961. Main pipe; 962. Diversion pipe; 10. Air supply pipe; 101. Blower; 11. Feed port; 12. Exhaust pipe; 21. Chamber; 22. Feed hopper; 23. Discharge port; 31. Guide frame; 51. Funnel. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] This application provides a rice husk combustion and recycling drying device, which can solve the problem in related technologies where rice husks are generated during rice processing and are not fully utilized for drying rice.

[0029] Please see Figures 1-3 A rice husk combustion and recycling drying device includes a combustion furnace 1 and a drying chamber 2. The combustion furnace 1 includes a biomass buffer chamber 3 and a combustion chamber 4 that are interconnected. The combustion furnace 1 has an ash chamber 5 that communicates with the combustion chamber 4. The combustion chamber 4 has a grate 6 located above the ash chamber 5. The combustion furnace 1 has a heat exchange chamber 7 that communicates with the combustion chamber 4. The combustion furnace 1 is equipped with an igniter 8, which is used to ignite the rice husks inside the combustion chamber 4. The heat exchange chamber 7 has a heat exchanger 9 inside.

[0030] The heat exchanger 9 has a heat exchange channel 91 for heating air. An air supply unit 95 is provided at one end of the heat exchange channel 91, and a hot air outlet pipe 96 is provided at the other end of the heat exchange channel 91. The other end of the hot air outlet pipe 96 is connected to the drying chamber 2 to supply hot air into the drying chamber 2.

[0031] Rice husks are fed into the biomass buffer chamber 3 and the combustion chamber 4. The biomass buffer chamber 3 serves to temporarily store the rice husks, ensuring a continuous supply to the combustion chamber 4 during combustion. The igniter 8 is activated to ignite the rice husks inside the combustion chamber 4. The rice husks begin to burn in the combustion chamber 4, generating a large amount of heat. During combustion, the slag after the rice husks burn will fall into the ash chamber 5 through the grate 6, achieving slag collection.

[0032] The hot flue gas generated by combustion rises and enters the heat exchange chamber 7, which is connected to the combustion chamber 4. The air supply unit 95 sends outside air into the heat exchange channel 91 inside the heat exchanger 9. The high-temperature flue gas flows around the heat exchanger 9 and exchanges heat with the air in the heat exchange channel 91, causing the air temperature to rise. The heated air becomes hot air and is transported to the drying chamber 2 through the hot air outlet pipe 96. The hot air flows in the drying chamber 2 and exchanges heat with the rice to be dried, transferring heat to the material and causing the moisture in the material to evaporate, thereby achieving the purpose of drying.

[0033] By using the biomass buffer chamber 3, combustion chamber 4, ash chamber 5, heat exchange chamber 7 and igniter 8 in combination, the rice husks produced during rice processing are fully utilized and burned as fuel to provide heat energy for the drying process. This avoids the waste of resources caused by the random disposal or inefficient use of rice husks, reduces dependence on traditional fossil energy such as coal and natural gas, and is in line with the concept of sustainable development. At the same time, by using free rice husks as fuel, the energy cost of the drying process is greatly reduced.

[0034] The heat exchanger 9 enables effective heat exchange between the high-temperature flue gas generated by combustion and the air to be heated, which can quickly heat the air to the required temperature and supply it stably to the drying chamber 2 in the form of hot gas, ensuring the temperature stability inside the drying chamber 2 and improving drying efficiency.

[0035] like Figure 2 As shown, in this embodiment, the ash chamber 5 is located at the bottom of the combustion chamber 4, and a funnel 51 located at the bottom of the grate 6 is provided on the ash chamber 5. The funnel 51 is used to guide the slag after combustion into the ash chamber 5.

[0036] When the equipment is started, rice husks are continuously supplied to the biomass buffer chamber 3 by a forklift, and the rice husks in the biomass buffer chamber 3 will continuously enter the combustion chamber 4 for combustion.

[0037] As combustion continues, the rice husks gradually burn out and produce slag. The grate 6 is located inside the combustion chamber 4 and above the ash chamber 5. It has pores that allow air to pass through to support combustion, while also allowing the slag to pass through.

[0038] Since the ash chamber 5 is located at the bottom of the combustion chamber 4, a funnel 51 located at the bottom of the grate 6 is provided on the ash chamber 5. Under the action of gravity, the slag will fall down through the grate 6. The funnel 51 is a cone shape that is wider at the top and narrower at the bottom, which can play a guiding role, so that the falling slag can slide smoothly down the slope of the funnel 51 into the ash chamber 5, thereby realizing the centralized collection of slag.

[0039] It is understandable that the combustion furnace 1 is provided with a slag discharge port that communicates with the ash chamber 5.

[0040] like Figure 1 and Figure 2 As shown, in one embodiment, the combustion furnace 1 is provided with an air supply pipe 10, which is located at the bottom of the grate 6. One end of the air supply pipe 10 is connected to the bottom of the combustion chamber 4, and a filter screen is provided at the end of the air supply pipe 10 connected to the combustion chamber 4. A blower 101 is provided at the other end of the air supply pipe 10.

[0041] Blower 101 starts to run. With its powerful force, blower 101 forcibly draws in air from outside the equipment and delivers it through air supply pipe 10. Since air supply pipe 10 is located at the bottom of grate 6 and one end is connected to the bottom of combustion chamber 4, air can be delivered to the bottom area of ​​combustion chamber 4 along air supply pipe 10.

[0042] After the air enters the bottom of the combustion chamber 4, it will flow upward and pass through the grate 6 due to the principle of hot air rising. At this time, the rice husks in the combustion chamber 4 are undergoing a combustion reaction. The air entering from the bottom provides the necessary oxygen for the rice husks to burn, allowing the rice husks to burn more fully and release more heat, providing sufficient heat energy for the subsequent drying process.

[0043] The filter screen of the air supply pipe 10 has a dense pore structure, which can intercept the burning slag and prevent the pipe from becoming blocked.

[0044] like Figure 1 and Figure 2 As shown, the combustion furnace 1 in this embodiment is provided with a feeding port 11, which is connected to the biomass buffer chamber 3. The biomass buffer chamber 3 is provided with a flow guide 31. The end of the flow guide 31 near the combustion chamber 4 is inclined downward. The flow guide 31 is used to introduce rice husks in the biomass buffer chamber 3 into the combustion chamber 4.

[0045] Before the equipment is put into operation, the operator adds the rice husks to be burned into the biomass buffer chamber 3 through the feed port 11 on the combustion furnace 1. The biomass buffer chamber 3 plays a role in buffering and storing, ensuring a continuous and stable supply of rice husks during the operation of the equipment, and avoiding combustion interruption due to untimely feeding.

[0046] The biomass buffer chamber 3 is equipped with a flow guide 31. When the equipment starts the combustion process and needs to replenish rice husks to the combustion chamber 4, the rice husks continuously fed into the biomass buffer chamber 3 will slide down along the inclined surface of the flow guide 31 under the action of gravity, ensuring that the rice husks can smoothly transition from the biomass buffer chamber 3 to the combustion chamber 4 for combustion.

[0047] The rice husks are fully burned in the combustion chamber 4, generating a large amount of high-temperature flue gas. The high-temperature flue gas carries a large amount of heat and enters the heat exchange chamber 7. In the heat exchange chamber 7, the high-temperature flue gas exchanges heat with the heat exchanger 9. The flue gas after heat exchange is guided to the external waste gas treatment equipment through the exhaust pipe 12 to complete the flue gas emission process.

[0048] In this embodiment, a furnace door is hinged to the feed port 11.

[0049] like Figure 2 and Figure 4 As shown, in one embodiment, the heat exchanger 9 includes a plurality of metal plates 92 arranged sequentially along the length of the combustion furnace 1. Each metal plate 92 has a cavity 93 inside. Two adjacent cavities 93 are connected by a plurality of flow pipes 94. Two adjacent flow pipes 94 are located on the upper and lower sides of the metal plate 92. The plurality of cavities 93 and the plurality of flow pipes 94 form a heat exchange channel 91.

[0050] The metal plate 92 has good thermal conductivity. When the high-temperature flue gas flows in the combustion furnace 1, it surrounds the metal plate 92. The surface of the metal plate 92 absorbs the heat from the high-temperature flue gas, and the heat is rapidly conducted within the metal plate 92, causing the temperature of the entire metal plate 92 to rise.

[0051] The cavity 93 inside the metal plate 92 is the main place for heat exchange. After the air enters the heat exchanger 9, it flows into each cavity 93. The air comes into contact with the inner wall of the metal plate 92, which is at a higher temperature, and absorbs the heat of the metal plate 92 through heat conduction. The temperature gradually rises. The air flows in the cavity 93 and continuously carries away the heat, so that the metal plate 92 can continuously absorb new heat from the high-temperature flue gas.

[0052] Two adjacent cavities 93 are connected by multiple flow pipes 94, and the two adjacent flow pipes 94 are located on the upper and lower sides of the metal plate 92, so that the air flow in the heat exchanger 9 forms a meandering path. Air flows from the upper flow pipe 94 of one cavity 93 into the adjacent cavity 93, and then flows into the next cavity 93 through the lower flow pipe 94, and flows through multiple cavities 93 in sequence to finally complete the heat exchange process.

[0053] Multiple metal plates 92 are arranged sequentially along the length of the combustion furnace 1, which greatly increases the surface area in contact with high-temperature flue gas and medium. The surface of each metal plate 92 participates in heat exchange. The presence of a large number of metal plates 92 greatly increases the total heat exchange area, improves the heat exchange efficiency, and can more fully recover the heat in the high-temperature flue gas generated by the combustion furnace 1.

[0054] The two adjacent cavities 93 are connected by multiple flow pipes 94 located on the upper and lower sides of the metal plate 92, so that the air flows in a meandering state in the heat exchange channel 91, which prolongs the residence time of the medium in the heat exchanger 9, increases the contact opportunity between the air and the metal plate 92, and enables the medium to absorb heat more fully, thereby further improving the heat exchange effect.

[0055] like Figure 2 and Figure 4 As shown, in one embodiment, the air supply unit 95 includes a fan, the air outlet of which is connected to the leftmost cavity 93 via a pipe; the hot air outlet pipe 96 includes a main pipe 961 connected to the rightmost cavity 93, the other end of the main pipe 961 extends to the outside of the combustion furnace 1, and the other end of the main pipe 961 is connected to a plurality of branch pipes 962, the other end of which is connected to the drying chamber 2.

[0056] After the fan starts, it draws in and pressurizes outside air, and then transports it to cavity 93 through a pipeline. The air may undergo preheating or other treatments here. Subsequently, the air flows through each cavity 93 in sequence, continuously absorbing heat during the flow process, and the temperature rises further. Finally, the high-temperature hot air is drawn out from the rightmost cavity 93 through the hot air outlet pipe 96, transported through the main pipe 961, and then evenly distributed into the drying chamber 2 through multiple branch pipes 962 to dry the material.

[0057] After the hot air is delivered to the outside of the combustion furnace 1 through the main pipe 961, it enters multiple distribution pipes 962. The distribution pipes 962 distribute the hot air evenly to different areas in the drying chamber 2, which can make the material in the drying chamber 2 receive uniform heat radiation and convection, thereby improving drying efficiency and drying quality.

[0058] like Figure 3 As shown, in one embodiment, the drying chamber 2 has a rice drying chamber 21 inside, a feeding hopper 22 communicating with the chamber is provided above the drying chamber 2, a discharge port 23 for discharging material is provided at the bottom of the drying chamber 2, and an exhaust pipe is provided on the drying chamber 2.

[0059] Rice is fed into the drying chamber 2 through the feeding hopper 22 located above the drying chamber 2. The chamber 21 of the drying chamber 2 is the main place for drying rice. Hot air enters the chamber 21 and comes into full contact with the rice inside the chamber 21. The hot air transfers heat to the rice, causing the moisture in the rice to evaporate. As the drying process proceeds, the exhaust pipe discharges the hot and humid air out of the drying chamber 2, maintaining a suitable humidity environment inside the chamber 21, which is conducive to the continuous and efficient drying of rice.

[0060] Once the rice reaches the required drying level, the dried rice is discharged through the discharge port 23 at the bottom of the drying chamber 2.

[0061] In this embodiment, the igniter 8 is...

[0062] A valve is installed on the discharge port 23 to control the discharge amount and discharge time of the rice.

[0063] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0064] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0065] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A rice husk combustion and recycling drying device, characterized in that, include: The combustion furnace (1) and the drying chamber (2) are provided. The combustion furnace (1) includes a biomass buffer chamber (3) and a combustion chamber (4) that are connected to each other. The combustion furnace (1) is provided with an ash chamber (5) that is connected to the combustion chamber (4). The combustion chamber (4) is provided with a grate (6) located above the ash chamber (5). The combustion furnace (1) is provided with a heat exchange chamber (7) that is connected to the combustion chamber (4). The combustion furnace (1) is provided with an igniter (8) for igniting the rice husks inside the combustion chamber (4). The heat exchange chamber (7) is provided with a heat exchanger (9). The heat exchanger (9) has a heat exchange channel (91) for heating air inside. An air supply unit (95) is provided at one end of the heat exchange channel (91), and a hot air outlet pipe (96) is provided at the other end of the heat exchange channel (91). The other end of the hot air outlet pipe (96) is connected to the drying chamber (2) to supply hot air into the drying chamber (2).

2. The rice husk combustion and recycling drying equipment as described in claim 1, characterized in that: The ash chamber (5) is located at the bottom of the combustion chamber (4). A funnel (51) located at the bottom of the grate (6) is provided on the ash chamber (5). The funnel (51) is used to guide the slag after combustion into the ash chamber (5).

3. The rice husk combustion and recycling drying equipment as described in claim 1, characterized in that: An air supply pipe (10) is provided on the combustion furnace (1). The air supply pipe (10) is located at the bottom of the grate (6). One end of the air supply pipe (10) is connected to the bottom of the combustion chamber (4). A filter screen is provided at the end of the air supply pipe (10) connected to the combustion chamber (4). A blower (101) is provided at the other end of the air supply pipe (10).

4. The rice husk combustion and recycling drying equipment as described in claim 1, characterized in that: The combustion furnace (1) is provided with a feeding port (11), which is connected to the biomass buffer chamber (3). The biomass buffer chamber (3) is provided with a flow guide (31). The end of the flow guide (31) near the combustion chamber (4) is inclined downward. The flow guide (31) is used to introduce rice husks in the biomass buffer chamber (3) into the combustion chamber (4).

5. The rice husk combustion and recycling drying equipment as described in claim 1, characterized in that: A flue pipe (12) is provided above the heat exchange chamber (7).

6. The rice husk combustion and recycling drying equipment as described in claim 1, characterized in that: The heat exchanger (9) includes a plurality of metal plates (92) arranged sequentially along the length of the combustion furnace (1). The metal plates (92) have cavities (93) inside. Two adjacent cavities (93) are connected by a plurality of flow pipes (94). Two adjacent flow pipes (94) are located on the upper and lower sides of the metal plates (92). The plurality of cavities (93) and the plurality of flow pipes (94) form a heat exchange channel (91).

7. The rice husk combustion and recycling drying equipment as described in claim 6, characterized in that: The air supply unit (95) includes a fan, and the air outlet of the fan is connected to the leftmost cavity (93) through a pipe; The hot air outlet pipe (96) includes a main pipe (961) connected to the rightmost cavity (93), the other end of the main pipe (961) extends to the outside of the combustion furnace (1), and the other end of the main pipe (961) is connected to a plurality of branch pipes (962), the other end of the branch pipes (962) is connected to the drying chamber (2).

8. The rice husk combustion and recycling drying equipment as described in claim 1, characterized in that: The drying chamber (2) has a rice drying chamber (21) inside. A feeding hopper (22) communicating with the chamber is provided above the drying chamber (2). A discharge port (23) for discharging material is provided at the bottom of the drying chamber (2). An exhaust pipe is provided on the drying chamber (2).

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