Rotary roasting furnace with tail gas purification and recovery functions

Abstract

The utility model discloses a rotary roasting furnace with tail gas purification and recovery functions, which comprises a roasting furnace body, a feed port arranged on one side of the roasting furnace body, an exhaust port arranged on the other side of the roasting furnace body, a tank body arranged on one side close to the exhaust port, the exhaust port penetrating through the tank body, and a material collecting structure arranged at the bottom of the tank body. The utility model relates to the technical field of roasting furnaces, in particular to a rotary roasting furnace and a tail gas treatment system of the rotary roasting furnace, tail gas is guided into the tank body through a shunting pipe, an airflow path is optimized by utilizing the diversion structure, and the tail gas treatment efficiency is improved. And the particles are settled in the tank body. One part of particles fall to the bottom of the tank body under the action of gravity, the other part of particles are filtered by a filter screen in the filtering structure in the air pumping process of the air pump, and finally all particles are collected into the material collecting structure at the bottom, so that the efficient tail gas purification and material recovery effects are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of roasting furnaces, in particular to a rotary roasting furnace with a tail gas purification and recovery function. Background Art

[0002] A roasting furnace is a device used for high-temperature treatment of materials. It is widely used in metal smelting, ore processing, chemical production and other fields that require heat treatment. Its basic function is to cause chemical changes or physical transformations in raw materials through high temperatures. It is usually used to decompose metal oxides in ores, remove moisture from materials, change the structure of materials or improve their properties.

[0003] Improper pretreatment of the tail gas from existing roasting furnaces may be a dual problem in terms of environment and economy. During the roasting process, the raw materials in the furnace are treated at high temperature, which often produces a large amount of gas, which contains some harmful gases and a certain amount of dust. If these tail gases are not properly pretreated and purified, they may pollute the environment and may also cause certain material losses in the production process.

[0004] Dust pollution: The dust generated during the roasting process not only affects the air quality, but may also cause equipment wear, pollute the surrounding environment, and even affect the health of operators.

[0005] Loss of valuable materials in harmful gases: During the roasting process, some valuable metal components or minerals may be discharged in the form of tail gas, resulting in material loss. For example, some ores containing precious metals or rare metals may be discharged in the form of slag through tail gas during the roasting process and cannot be fully recovered, resulting in a waste of resources. Utility Model Content

[0006] In view of the shortcomings of the prior art, the utility model provides a rotary roasting furnace with exhaust gas purification and recovery function, which solves the problem that the existing roasting furnace has improper exhaust gas pretreatment, which may cause environmental pollution (this case mainly treats waste slag and dust in the exhaust gas) and a certain degree of material loss.

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a rotary roasting furnace with exhaust gas purification and recovery function, including a roasting furnace body, a feed port is provided on one side of the roasting furnace body, an exhaust port is provided on the other side of the roasting furnace body, a tank body is provided on the side close to the exhaust port, the exhaust port passes through the tank body, a material collecting structure is provided at the bottom of the tank body, a guide structure is provided in the tank body and on the upper side of the exhaust port, and a filtering structure is installed in the tank body and on the upper side of the guide structure.

[0008] Preferably, the material collecting structure includes a rotating rod, which is rotatably arranged at the bottom of the tank body, a scraper is installed at the top of the rotating rod, and the scraper is abutted against the inner bottom surface of the tank body, a first motor is installed at the bottom of the tank body, the lower shaft end of the rotating rod passes through the tank body and a right-angle coupling is provided between the rotating end of the first motor, a discharge port is inserted at the bottom of the tank body, and a collection trough is provided at the lower side of the discharge port.

[0009] Preferably, the guide structure includes a plurality of first annular baffles and a plurality of second annular baffles, and the plurality of first annular baffles and the plurality of second annular baffles are arranged on the inner annular surface of the tank body, the cross-section of the first annular baffle is an upright truncated cone, the cross-section of the second annular baffle is an inverted truncated cone, and the plurality of first annular baffles and the plurality of second annular baffles are overlapped to form a stepped air duct.

[0010] Preferably, a plurality of diverter pipes are provided on the exhaust port, and the outlet ends of the diverter pipes are arranged with the upper end of the exhaust port as the center of a circle, and the outlet ends of adjacent diverter pipes are equidistant and correspond to the air duct.

[0011] Preferably, the filtering structure comprises a cylinder, the cylinder is inserted on the top of the tank body, an air pump is installed on the top of the tank body, the air inlet end of the air pump is connected to the inner cavity of the cylinder, and a plurality of filters are embedded on the outer wall of the cylinder.

[0012] Preferably, a second motor is installed in the cylinder, a connecting rod is installed on the rotating end of the second motor, a plurality of metal brushes are installed on the outer ring surface of the connecting rod, the metal brushes abut against the filter, and a heat insulation cover is provided on the outer side of the second motor.

[0013] Beneficial Effects

[0014] The utility model provides a rotary roasting furnace with exhaust gas purification and recovery functions. It has the following beneficial effects: the rotary roasting furnace, the exhaust gas treatment system of the rotary roasting furnace guides the exhaust gas into the tank body through the diversion pipe, and optimizes the airflow path by using the guide structure, so that the particles settle in the tank body. A part of the particles falls to the bottom of the tank body due to gravity, and the other part is filtered by the filter screen in the filter structure through the air pumping process, and finally all the particles are collected in the material collection structure at the bottom, thereby achieving efficient exhaust gas purification and material recovery effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 This is a schematic diagram of the structure of point A of the present utility model.

[0017] Figure 3 This is a schematic diagram of the structure of point B of the present utility model.

[0018] In the figure: 1. roasting furnace body; 2. tank body; 3. scraper; 4. rotating rod; 5. first motor; 6. right-angle coupling; 7. discharge port; 8. collecting trough; 9. first annular baffle; 10. second annular baffle; 11. diverter pipe; 12. cylinder; 13. air pump; 14. filter screen; 15. second motor; 16. metal brush. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] All electrical components in this case are connected to their corresponding power supplies through wires by personnel in this field, and a suitable controller should be selected according to actual conditions to meet control requirements. The specific connection and control sequence should refer to the working sequence between the electrical components in the following working principle to complete the electrical connection. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and no longer explains the electrical control.

[0021] See also Figure 1-3 The utility model provides a technical solution: a rotary roasting furnace with exhaust gas purification and recovery function, comprising a roasting furnace body 1, a feed port is provided on one side of the roasting furnace body 1, an exhaust port is provided on the other side of the roasting furnace body 1, a tank body 2 is provided on the side close to the exhaust port, the exhaust port penetrates the tank body 2, a material collecting structure is provided at the bottom of the tank body 2, a guide structure is provided in the tank body 2 and located on the upper side of the exhaust port, and a filtering structure is installed in the tank body 2 and located on the upper side of the guide structure.

[0022] Embodiment 1: The material collecting structure includes a rotating rod 4, which is rotatably arranged at the bottom of the tank body 2, a scraper 3 is installed at the top of the rotating rod 4, and the scraper 3 is against the inner bottom surface of the tank body 2. A first motor 5 is installed at the bottom of the tank body 2, and the lower shaft end of the rotating rod 4 passes through the tank body 2 and a right-angle coupling 6 is provided between the rotating end of the first motor 5 and the lower shaft end of the rotating rod 4. A discharge port 7 is inserted at the bottom of the tank body 2, and a collection trough 8 is provided at the lower side of the discharge port 7;

[0023] Specifically, the design focus of the first embodiment is to effectively collect the particles generated during the roasting process through the rotating rod 4 and the scraper 3 structure. The specific principle is as follows:

[0024] Rotating rod 4 and scraper 3: When the exhaust gas enters the tank body 2 through the exhaust port, part of the particles fall to the bottom of the tank body 2 due to gravity. The rotating rod 4 rotates to drive the scraper 3 to scrape the particles at the bottom of the tank body 2, thereby pushing the particles to the discharge port 7.

[0025] Discharge port 7 and collection trough 8: The scraper 3 collects the particles to the discharge port 7, which is connected to the collection trough 8 for collecting and storing the particles. The first motor 5 drives the rotating rod 4 to rotate, ensuring that the materials are continuously collected and discharged.

[0026] Embodiment 2: The guide structure includes a plurality of first annular baffles 9 and a plurality of second annular baffles 10, and the plurality of first annular baffles 9 and the plurality of second annular baffles 10 are arranged on the inner annular surface of the tank body 2, the cross section of the first annular baffle 9 is an upright truncated cone, the cross section of the second annular baffle 10 is an inverted truncated cone, and the plurality of first annular baffles 9 and the plurality of second annular baffles 10 are overlapped to form a stepped air duct.

[0027] The exhaust port is provided with a plurality of shunt pipes 11, the outlet ends of the shunt pipes 11 are arranged with the upper end of the exhaust port as the center, and the outlet ends of adjacent shunt pipes 11 are spaced equally and correspond to the air duct;

[0028] Specifically, in the second embodiment, the flow path of the exhaust gas is optimized by providing an annular baffle and a diverter pipe 11 to improve the collection efficiency of particulate matter. The principle is as follows:

[0029] Guide structure: The guide structure in the tank body 2 is formed by overlapping the first annular baffle 9 and the second annular baffle 10 to form a stepped air duct to control the flow path of the exhaust gas. Through this design, the particulate matter in the exhaust gas is guided in the air duct and gradually settled.

[0030] Diverter pipe 11: A diverter pipe 11 is provided on the exhaust port, and the outlet ends of the diverter pipe 11 are arranged at equal distances to ensure that the exhaust gas is evenly distributed to different areas in the tank body 2. During the flow process, the particles are affected by gravity, and some particles will hit the annular baffle and fall to the bottom of the tank body 2.

[0031] Embodiment 3: The filtering structure comprises a cylinder 12, which is inserted into the top of the tank body 2. An air pump 13 is installed on the top of the tank body 2. The air inlet end of the air pump 13 is connected to the inner cavity of the cylinder 12. A plurality of filters 14 are embedded on the outer wall of the cylinder 12.

[0032] A second motor 15 is installed in the cylinder 12, a connecting rod is installed on the rotating end of the second motor 15, a plurality of metal brushes 16 are installed on the outer ring surface of the connecting rod, the metal brushes 16 abut against the filter 14, and a heat shield is provided on the outer side of the second motor 15;

[0033] The third embodiment focuses on further purifying the fine particles in the exhaust gas through the air pump 13 and the filter screen 14 system. The principle is as follows:

[0034] Air pump 13 and cylinder 12: The air pump 13 draws out the air inside the cylinder 12 to introduce the exhaust gas into the cylinder 12 at the top of the tank 2. The air inlet end of the air pump 13 is connected to the inner cavity of the cylinder 12, and the air flow passes through the filter 14 to filter out fine particles in the exhaust gas.

[0035] Metal brush 16 and filter 14: In order to ensure the cleanliness and efficient filtration of the filter 14, the second motor 15 drives the connecting rod to rotate, and the metal brush 16 on the outer ring surface of the connecting rod contacts the filter 14 to remove the particulate matter accumulated on the filter 14. The filtered exhaust gas continues to be discharged through the air pump 13. The metal brush 16 can sweep away the impurities stuck in the mesh by cleaning the inner side of the filter 14, and the metal brush 16 will vibrate (vibrate) when in contact with the inner wall of the filter 14, shaking off the impurities filtered out from the outside.

[0036] Collecting particulate matter: The particulate matter in the exhaust gas will eventually be filtered by the filter 14 and fall to the bottom of the tank 2 and collected by the material collection structure.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0038] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary roasting furnace with tail gas purification and recovery function, comprising a roasting furnace body (1), characterized in that: A feed port is provided on one side of the roasting furnace body (1), an exhaust port is provided on the other side of the roasting furnace body (1), a tank body (2) is provided on the side close to the exhaust port, the exhaust port penetrates the tank body (2), a material collecting structure is provided at the bottom of the tank body (2), a flow guide structure is provided in the tank body (2) and located above the exhaust port, and a filtering structure is installed in the tank body (2) and located above the flow guide structure.

2. The rotary roasting furnace with tail gas purification and recovery function according to claim 1, characterized in that: The material collecting structure comprises a rotating rod (4), the rotating rod (4) being rotatably arranged at the bottom of the tank body (2), a scraper (3) being installed at the top end of the rotating rod (4), the scraper (3) being in contact with the inner bottom surface of the tank body (2), a first motor (5) being installed at the bottom of the tank body (2), a lower shaft end of the rotating rod (4) passing through the tank body (2) and a right-angle coupling (6) being arranged between the rotating end of the first motor (5), a discharge port (7) being inserted at the bottom of the tank body (2), and a material collecting trough (8) being arranged at the lower side of the discharge port (7).

3. The rotary roasting furnace with tail gas purification and recovery function according to claim 1, characterized in that: The air guide structure comprises a plurality of first annular baffles (9) and a plurality of second annular baffles (10); the plurality of first annular baffles (9) and the plurality of second annular baffles (10) are arranged on the inner annular surface of the tank body (2); the cross section of the first annular baffle (9) is in the shape of an upright truncated cone, and the cross section of the second annular baffle (10) is in the shape of an inverted truncated cone; the plurality of first annular baffles (9) and the plurality of second annular baffles (10) are overlapped to form a stepped air duct.

4. The rotary roasting furnace with tail gas purification and recovery function according to claim 3, characterized in that: A plurality of shunt pipes (11) are provided on the exhaust port, the outlet ends of the shunt pipes (11) are arranged with the upper end of the exhaust port as the center of a circle, and the outlet ends of adjacent shunt pipes (11) are spaced equally apart and correspond to the air duct.

5. The rotary roasting furnace with tail gas purification and recovery function according to claim 1, characterized in that: The filtering structure comprises a cylinder (12), the cylinder (12) being inserted into the top of the tank body (2), an air pump (13) being installed on the top of the tank body (2), an air inlet end of the air pump (13) being connected to the inner cavity of the cylinder (12), and a plurality of filter screens (14) being embedded on the outer wall of the cylinder (12).

6. The rotary roasting furnace with tail gas purification and recovery function according to claim 5, characterized in that: A second motor (15) is installed in the cylinder (12), a connecting rod is installed on the rotating end of the second motor (15), a plurality of metal brushes (16) are installed on the outer ring surface of the connecting rod, the metal brushes (16) are against the filter screen (14), and a heat insulation cover is provided on the outer side of the second motor (15).

Images