Device for regenerating spent bleaching clay

Abstract

The utility model relates to the technical field of spent bleaching clay treatment, and discloses a spent bleaching clay regeneration device which comprises a reactor and an air distribution plate, a spent bleaching clay inlet and a high-temperature air inlet are formed in the side wall of the reactor, the air distribution plate is installed in the reactor, the spent bleaching clay inlet is located above the air distribution plate, and the high-temperature air inlet is located below the reactor. The air distribution plate is provided with a nozzle and a discharging pipe penetrating through the air distribution plate, an air distribution cavity is formed in the air distribution plate and communicated with the nozzle and the high-temperature air inlet, and the nozzle is located on the upper surface of the air distribution plate. The scheme is used for treating the extracted oil-containing spent bleaching clay, oil adsorbed by the clay is combusted through high-temperature air, the adsorption performance of the clay is recovered, and the operation cost of an enterprise is reduced; meanwhile, the nozzles and the discharging pipes are arranged on the air distribution plate, so that gas can be more uniformly distributed in the bubbling bed, the utilization rate of heat is improved, and the accumulation of materials in a reaction area of the regeneration device is avoided.

Description

Technical Field

[0001] This utility model relates to the field of waste bleaching clay treatment technology, specifically to a device for the regeneration of waste bleaching clay. Background Technology

[0002] Activated clay is a non-metallic mineral with strong adsorption properties, mainly composed of clay minerals such as montmorillonite and kaolinite. It is widely used in the decolorization and refining of mineral oils, animal and vegetable oils, waxes, and organic liquids. However, as the adsorption capacity of activated clay becomes saturated, it becomes waste clay with an oil content of 15% to 40%. Oily waste clay typically has a grayish-black, muddy appearance and a slight solvent odor. It is classified as hazardous waste by national regulations and must be treated to achieve harmlessness.

[0003] Currently, research on oily waste bleaching clay mainly focuses on two aspects: the recovery of oil from the waste bleaching clay and its comprehensive utilization. Methods for oil recovery include mechanical high-pressure filtration, centrifugation, aqueous solutions, and surfactants. However, these methods share the common problem of not being able to completely extract the oil from the waste bleaching clay. Although the waste bleaching clay after oil extraction can be used as filler in some polymers, in cement and brick production, or in the preparation of organobentonite and as a building sealant, the demand from relevant enterprises is very low, resulting in low economic benefits and hindering the maximization of the utilization of oily waste bleaching clay. Utility Model Content

[0004] The present invention aims to provide a device for the regeneration of waste bleaching clay, in order to solve the problems that the oil in waste bleaching clay cannot be completely extracted, the demand for recycled oil-containing waste bleaching clay is low, and the oil-containing waste bleaching clay cannot be maximized.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a device for the regeneration of waste bleaching clay, comprising: a reactor and an air distribution plate, wherein the side wall of the reactor is provided with a waste bleaching clay inlet and a high-temperature air inlet, the air distribution plate is installed inside the reactor, the waste bleaching clay inlet is located above the air distribution plate, the air distribution plate is provided with a nozzle and a feed pipe penetrating the air distribution plate, the air distribution plate is provided with an air distribution cavity, the air distribution cavity is connected to the nozzle and the high-temperature air inlet, and the nozzle is located on the upper surface of the air distribution plate.

[0006] The principle of this scheme is as follows: High-temperature air enters the air distribution chamber through the high-temperature air inlet, and then enters the air distribution plate above through the nozzle. The oily waste bleaching clay is transported into the reactor through the waste bleaching clay inlet. The oily waste bleaching clay is mixed with the high-temperature air, and the high-temperature air causes the oil adsorbed by the bleaching clay to burn, thereby achieving the purpose of removing the oil adsorbed by the bleaching clay. In addition, the high-temperature air makes the waste bleaching clay fully dispersed, avoiding the accumulation of waste bleaching clay, and ensuring that the oil in the waste bleaching clay is fully burned.

[0007] Advantages of this solution: This solution fully combusts the oil adsorbed by the oily waste bleaching clay after extraction treatment and restores its adsorption performance by using high-temperature air, reducing the cost of using bleaching clay for enterprises; by setting nozzles and feed pipes on the air distribution plate, the gas can be more evenly distributed in the bubbling bed, improving the heat utilization rate and avoiding the accumulation of materials in the reaction zone of the reactor; at the same time, the gas is used to disperse the waste bleaching clay, preventing its accumulation, and ensuring that each part of the material is fully heated by the high-temperature air, thus ensuring the oil removal effect in the waste bleaching clay.

[0008] Preferably, the upper surface of the air distribution plate is provided with multiple sets of nozzles from the inside to the outside. Each set of nozzles is evenly distributed in a ring on the air distribution plate, and at least one set of evenly distributed nozzles is inclined towards each other. The nozzles are inclined and opposite each other. When two airflows travel in opposite directions, they will intersect, collide and interact with each other, resulting in the mixing or agitation of the airflow. This agitates and disperses the airflow above the air distribution plate, allowing the material to fully contact the high-temperature air, further ensuring the oil removal effect in the waste bleaching clay.

[0009] Preferably, the edge of the upper surface of the air distribution plate is recessed towards its center. This allows the center to flow and discharge more easily, minimizing the amount of processed material remaining at the edge of the air distribution plate.

[0010] Preferably, the reactor also includes a cyclone separator, the inlet of which is connected to the reactor's exhaust port. The cyclone separator further treats the dust-laden flue gas from the reactor, reducing environmental pollution caused by flue gas emissions.

[0011] Preferably, the diameter of the cyclone separator inlet gradually decreases along its air intake direction. When fluid passes through a pipe, the cross-sectional area of ​​the pipe decreases (i.e., gradually narrows), and the flow velocity increases. This increases the flow velocity of the dust-laden flue gas entering the cyclone separator, accelerates the separation speed of the cyclone separator, reduces separation time, and saves resources.

[0012] Preferably, the inlet of the cyclone separator is arranged along the tangent direction of the cyclone separator. This, in conjunction with the cyclone separator, results in better separation effect and faster separation speed.

[0013] Preferably, the nozzles on the edge of the air distribution plate face the tangential direction of the air distribution plate. The nozzles are positioned tangentially to the air distribution plate, causing the airflow ejected from the nozzles to spiral upwards along the reactor wall, thus allowing the flue gas from the reactor to enter the cyclone separator tangentially. This arrangement, in conjunction with the cyclone separator, results in better separation and faster separation speed.

[0014] Preferably, the waste bleaching clay inlet is inclined downward on the reactor to facilitate the addition of waste bleaching clay.

[0015] Preferably, the reactor is equipped with an electric valve at the bottom discharge port to control the discharge port. The reactor is equipped with a high-level level gauge and a low-level level gauge, located between the electric valve and the air distribution plate. When the level of treated kaolin in the reactor reaches the low-level level gauge, the electric valve is controlled to close the discharge port; when the level of treated kaolin in the reactor reaches the high-level level gauge, the electric valve is controlled to open the discharge port. By setting up level gauges and establishing an interlock between them and the electric valve, the system's discharge is automated. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the air distribution plate in an embodiment of this utility model. Detailed Implementation

[0018] The following detailed description illustrates the specific implementation method:

[0019] The reference numerals in the accompanying drawings include: 1. Cyclone separator outlet; 2. Cyclone separator inlet; 3. Dust outlet; 4. Waste clay inlet; 5. High-temperature air inlet; 6. High-level level gauge; 7. Low-level level gauge; 8. Electric valve; 9. Feed pipe; 10. Nozzle.

[0020] Example:

[0021] An apparatus for the regeneration of waste bleaching clay, such as Figure 1 and Figure 2 As shown, it includes: a reactor, an air distribution plate, and a cyclone separator.

[0022] An exhaust port is located at the top of the reactor, and this exhaust port is connected to the inlet 2 of a cyclone separator. The cyclone separator further treats the dust-laden flue gas from the reactor, reducing environmental pollution caused by flue gas emissions.

[0023] The diameter of the cyclone separator inlet 2 gradually decreases along its air inlet direction. As fluid passes through a pipe, the cross-sectional area of ​​the pipe decreases (i.e., gradually narrows), increasing the flow velocity. This increases the velocity of the dust-laden gas entering the cyclone separator, accelerating the separation speed, reducing separation time, and saving resources. The cyclone separator inlet 2 is positioned tangentially to the cyclone separator. This arrangement, in conjunction with the cyclone separator, results in better separation performance and faster separation speed.

[0024] The cyclone separator has a cyclone separator inlet 2 near the top side, a cyclone separator outlet 1 on the top surface, and a dust outlet 3 at the bottom. The internal structure and working principle of the cyclone separator are based on existing technology and will not be described in detail here.

[0025] The reactor sidewall is equipped with a waste clay inlet 4, which is inclined on the reactor. Waste clay containing a small amount of oil after extraction is transported into the reactor through the waste clay inlet 4. The inclined setting makes it easier for the material to enter the reactor, and at the same time, the inclined setting can give the material a certain flow direction and flow velocity, so that the material falls into the reactor over a larger area, which is conducive to the material being dispersed in the reactor.

[0026] A high-temperature air inlet 5 is located on the side wall of the reactor. An air distribution plate is installed inside the reactor, and a waste bleaching clay inlet 4 is located above the air distribution plate. The air distribution plate is equipped with nozzles 10 and a feed pipe 9 that penetrates the air distribution plate. An air distribution chamber is located inside the air distribution plate, communicating with the nozzles 10 and the high-temperature air inlet 5. The nozzles 10 are located on the upper surface of the air distribution plate. High-temperature air enters the air distribution chamber through the high-temperature air inlet, and then enters the area above the air distribution plate through the nozzles 10. The high-temperature air causes the oil adsorbed by the bleaching clay to burn, achieving the purpose of removing the oil adsorbed by the bleaching clay. Furthermore, the high-temperature air fully disperses the waste bleaching clay, preventing it from accumulating and ensuring complete combustion of the oil within it. In this embodiment, the shape of the air distribution plate and the corresponding cross-sectional shape of the reactor installation location are the same, both being circular.

[0027] The upper surface of the air distribution plate is provided with multiple sets of nozzles 10 from the inside to the outside. In this embodiment, there are 8 sets of nozzles 10, each set of nozzles 10 is evenly distributed in a ring on the air distribution plate, and at least one set of evenly distributed nozzles 10 is inclined towards each other. When the nozzles 10 are inclined and opposite each other, when the two airflows travel towards each other, they will intersect, collide and interact with each other, resulting in the mixing or agitation of the airflow, which in turn agitates and disperses the airflow above the air distribution plate, so that the material can fully contact the high-temperature air, further ensuring the oil removal effect in the waste bleaching clay.

[0028] The nozzles 10 on the edge of the air distribution plate face the tangential direction of the air distribution plate. The nozzles 10 are positioned along the tangential direction of the air distribution plate, causing the airflow ejected from the nozzles 10 to spiral upwards along the reactor wall, thus allowing the flue gas from the reactor to enter the cyclone separator tangentially. This combination with the cyclone separator results in better separation and faster separation speed.

[0029] The edge of the upper surface of the air distribution plate is recessed towards the center. This design, with the center lower than the edge, facilitates the flow and discharge of material towards the center, minimizing the accumulation of processed material at the edge of the air distribution plate. In this embodiment, the air distribution plate is specifically disc-shaped, arc-shaped, or recessed inward.

[0030] The air distribution plate is provided with multiple sets of feeding pipes 9 from the inside to the outside. Each set of feeding pipes 9 is evenly distributed in a ring on the air distribution plate. The spacing between the feeding pipes 9 and the spacing between the nozzles 10 in each set gradually increases from the inside to the outside of the air distribution plate.

[0031] The bottom discharge zone of the reactor is cone-shaped. An electric valve 8 controls the discharge port at the bottom of the reactor. A high-level level gauge 6 and a low-level level gauge 7 are installed on the reactor, located between the electric valve 8 and the air distribution plate. When the height of the treated bleached soil in the reactor reaches the low-level level gauge 7, the electric valve 8 is controlled to close the discharge port; when the height of the treated bleached soil in the reactor reaches the high-level level gauge 6, the electric valve 8 is controlled to open the discharge port. By setting high and low level gauges, the accumulation height of the bleached soil in the reactor's discharge zone is automatically obtained, and an interlock is established between the gauges and the electric valve 8, achieving automated discharge of the system, making it more convenient and easier to operate.

[0032] The specific implementation process is as follows:

[0033] High-temperature air (controlled at 500-600℃) heated by the furnace enters the air distribution plate through high-temperature air inlet 5, then enters the air distribution area of ​​the reactor through the air distribution chamber and nozzles 10, ensuring even distribution of the high-temperature air within the reactor. Once the system stabilizes, oily waste clay enters the reactor through waste clay inlet 4 and mixes thoroughly with the high-temperature air, removing the oil adsorbed by the clay. Dust-laden flue gas enters the cyclone separator through the exhaust port at the top of the reactor. The separated dust is discharged through the dust outlet 3 of the cyclone separator, and the flue gas is discharged through the cyclone separator outlet 1. After complete oil removal, the clay enters the discharge area at the bottom of the reactor through the feed pipe 9. When the clay level in the discharge area reaches the high level, the electric valve 8 opens, discharging the clay into the collection tank. When the clay level in the discharge area reaches the low level, the electric valve 8 closes, stopping the discharge.

[0034] This solution treats oily waste clay after extraction by using high-temperature air to completely burn the oil adsorbed by the clay and restore its adsorption performance, thus reducing the operating costs of relevant enterprises. By setting nozzles 10 and feed pipes 9 on the air distribution plate, the gas can be distributed more evenly in the bubbling bed, improving the heat utilization rate and avoiding the accumulation of materials in the reaction zone of the regeneration device. By setting a level gauge in the cone hopper and establishing its interlock with the electric valve 8, the system discharge is automated.

[0035] The above descriptions are merely embodiments of this utility model, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" 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 direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A device for regeneration of spent white clay, characterized in that, The application relates to a reactor and a wind distribution plate, wherein the reactor is provided with a waste white clay inlet and a high-temperature air inlet, the wind distribution plate is installed in the reactor, the waste white clay inlet is located above the wind distribution plate, the wind distribution plate is provided with nozzles and a feeding pipe penetrating through the wind distribution plate, the wind distribution plate is provided with a wind distribution cavity, the wind distribution cavity is communicated with the nozzles and the high-temperature air inlet, and the nozzles are located on the upper surface of the wind distribution plate. The upper surface of the wind distribution plate is provided with a plurality of groups of nozzles from inside to outside, each group of nozzles is annularly and uniformly distributed on the wind distribution plate, and at least one group of annularly and uniformly distributed nozzles is oppositely and obliquely arranged.

2. A device for regeneration of spent white clay according to claim 1, characterized in that: The edge of the upper surface of the wind distribution plate is concave to the middle part.

3. A device for regeneration of spent white clay according to claim 1, characterized in that: The application further relates to a cyclone separator, wherein the inlet of the cyclone separator is communicated with the exhaust port of the reactor.

4. A device for regeneration of spent white clay according to claim 1, characterized in that: The diameter of the inlet of the cyclone separator gradually decreases along the air inlet direction.

5. A device for regeneration of spent white clay according to claim 4, characterized in that: The inlet of the cyclone separator is arranged along the tangential direction of the cyclone separator.

6. A device for regeneration of spent white clay according to claim 4, characterized in that: The nozzles of the edge of the wind distribution plate are directed to the tangential direction of the wind distribution plate.

7. A device for regeneration of spent white clay according to claim 4, characterized in that: The waste white clay inlet is obliquely arranged on the reactor.

8. A device for regeneration of spent white clay according to claim 1, characterized in that: An electric valve for controlling the discharge port is arranged at the bottom of the reactor, high-level and low-level material level meters are arranged on the reactor, and the high-level and low-level material level meters are located between the electric valve and the wind distribution plate.

9. A device for regeneration of spent white clay according to claim 1, characterized in that: ​

Images