Device for regenerating spent bleaching clay

Abstract

The invention 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] The invention relates to the technical field of waste clay treatment, and in particular to a device for regenerating waste clay. Background Art

[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 plant oils, waxes and organic liquids. However, as the adsorption performance of activated clay becomes saturated, it will become waste clay with an oil content of 15% to 40%. The appearance of oil-containing waste clay is usually gray-black mud with a slight solvent odor. It is a hazardous waste specified by the state and must be treated to be harmless.

[0003] At present, the research on oil-containing waste clay mainly focuses on the recovery of oil in waste clay and the comprehensive utilization of waste clay. The methods of oil recovery include mechanical high-pressure filtration, centrifugation, water agent method and surfactant method, but the common problem faced by these methods is that the oil in the waste clay cannot be completely extracted. Although the waste clay after oil extraction can be used as a filler for some polymers, it can also be used to make cement and bricks, or to prepare organic bentonite and building sealants, etc., the demand for it by related enterprises is very low, and the economic benefits are also low, which cannot maximize the utilization of oil-containing waste clay. Summary of the invention

[0004] The present invention is intended to provide a device for regenerating waste clay to solve the current problems that the oil in the waste clay cannot be completely extracted, the demand for the recovered oil-containing waste clay is low, and the oil-containing waste clay cannot be maximized.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a device for regenerating waste clay, comprising: a reactor and an air distribution plate, the side wall of the reactor is provided with a waste clay inlet and a high-temperature air inlet, the air distribution plate is installed in the reactor, the waste clay inlet is located above the air distribution plate, the air distribution plate is provided with a nozzle and a feed pipe passing through the air distribution plate, an air distribution cavity is provided in the air distribution plate, the air distribution cavity is connected with 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 cavity through the high-temperature air port, and then enters above the air distribution plate through the nozzle, and the oil-containing waste clay is transported to the reactor through the waste clay inlet, and the oil-containing waste clay is mixed with the high-temperature air. The high-temperature air burns the oil adsorbed by the clay, thereby achieving the purpose of removing the oil adsorbed by the clay. In addition, the high-temperature air fully disperses the waste clay, avoids the aggregation of the waste clay, and fully burns the oil in the waste clay.

[0007] Advantages of this solution: This solution uses high-temperature air to fully burn the oil adsorbed by the oil-containing waste clay after extraction and restore its adsorption performance, reducing the cost of using clay for enterprises; by setting nozzles and feed pipes on the air distribution plate, the gas can be distributed more evenly in the bubbling bed, improving the utilization rate of heat 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 clay to avoid the accumulation of waste clay, so that each part of the material and the high-temperature air are fully heated to ensure the oil removal effect in the waste clay.

[0008] Preferably, the upper surface of the air distribution plate is provided with multiple groups of nozzles from the inside to the outside, each group of nozzles is evenly distributed on the air distribution plate in an annular manner, and at least one group of evenly distributed nozzles is arranged obliquely toward each other. The nozzles are arranged obliquely and relatively, and when the two airflows are opposite to each other, they will intersect, collide and interact with each other, resulting in mixing or stirring of the airflows, and then stirring and dispersing the airflow above the air distribution plate, so that the material is fully in contact with the high-temperature air, further ensuring the oil removal effect in the waste clay.

[0009] Preferably, the edge of the upper surface of the air distribution plate is recessed toward the middle thereof, so that the middle portion is lower than the edge, which facilitates the material to flow toward the middle portion and discharge, and avoids the processed material from staying at the edge of the air distribution plate as much as possible.

[0010] Preferably, a cyclone separator is further included, and the inlet of the cyclone separator is connected to the exhaust port of the reactor. The dust-containing flue gas of the reactor is further processed by the cyclone separator to reduce environmental pollution caused by flue gas emission.

[0011] Preferably, the diameter of the cyclone separator inlet gradually decreases along its air inlet direction. When the fluid passes through a pipe, the cross-sectional area of ​​the pipe becomes smaller (i.e. gradually narrows), and the flow rate increases, thereby increasing the flow rate of the dust-laden flue gas entering the cyclone separator, speeding up the separation speed of the cyclone separator, reducing the separation time, and saving resources.

[0012] Preferably, the cyclone separator inlet is arranged along the tangent direction of the cyclone separator, so as to cooperate with the cyclone separator, the separation effect is better and the separation speed is faster.

[0013] Preferably, the nozzles at the edge of the air distribution plate face the tangent direction of the air distribution plate. The nozzles are arranged along the tangent direction of the air distribution plate, so that the airflow ejected from the nozzles spirals upward along the reactor wall, and then the smoke from the reactor can enter the cyclone separator along the tangent direction of the cyclone separator. In this way, the separation effect is better and the separation speed is faster when combined with the cyclone separator.

[0014] Preferably, the waste clay inlet is arranged on the reactor at an angle downward to facilitate the addition of the waste clay.

[0015] Preferably, an electric valve for controlling the discharge port is provided at the discharge port at the bottom of the reactor, and a high-level material level meter and a low-level material level meter are provided on the reactor, and the high-level material level meter and the low-level material level meter are located between the electric valve and the air distribution plate. When the height of the treated clay in the reactor is at the low-level material level meter, the electric valve is controlled to close the discharge port, and when the height of the treated clay in the reactor is at the high-level material level meter, the electric valve is controlled to open the discharge port. By setting the material level meter and establishing an interlock with the electric valve, the system discharge automation is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0017] Figure 2 It is a schematic structural diagram of the air distribution plate according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The following is further described in detail through specific implementation methods:

[0019] The figure marks in the drawings of the specification include: cyclone separator outlet 1, cyclone separator inlet 2, dust outlet 3, waste clay inlet 4, high-temperature air inlet 5, high-level material level meter 6, low-level material level meter 7, electric valve 8, discharge pipe 9, and nozzle 10.

[0020] Example:

[0021] A device for regenerating waste 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 provided on the top of the reactor, and the exhaust port of the reactor is connected to the cyclone separator inlet 2. The dust-containing flue gas of the reactor is further processed by the cyclone separator to reduce environmental pollution caused by flue gas emission.

[0023] The diameter of the cyclone separator inlet 2 gradually decreases along its air inlet direction. When a fluid passes through a pipe, the cross-sectional area of ​​the pipe becomes smaller (i.e. gradually narrows), and the flow rate increases, thereby increasing the flow rate of dust-laden flue gas entering the cyclone separator, accelerating the separation speed of the cyclone separator, reducing the separation time, and saving resources. The cyclone separator inlet 2 is arranged along the tangent direction of the cyclone separator. In this way, the separation effect is better and the separation speed is faster when the cyclone separator is matched.

[0024] The cyclone separator has a cyclone separator inlet 2 near the top end side, a cyclone separator outlet 1 on the top surface, and a dust outlet 3 at the bottom of the cyclone separator. The internal structure and principle of the cyclone separator refer to the prior art and will not be described in detail here.

[0025] A waste clay inlet 4 is arranged on the side wall of the reactor, and the waste clay inlet 4 is arranged obliquely on the reactor. The waste clay containing a small amount of oil after extraction is transported into the reactor through the waste clay inlet 4. The oblique arrangement makes it easier for the material to enter the reactor. At the same time, the oblique arrangement can make the material have a certain flow direction and flow speed, so that the area where the material falls into the reactor is as large as possible, which is conducive to the dispersion of the material in the reactor.

[0026] The high-temperature air inlet 5 is on the side wall of the reactor, and the air distribution plate is installed in the reactor. The waste clay inlet 4 is located above the air distribution plate. The air distribution plate is provided with a nozzle 10 and a feed pipe 9 that passes through the air distribution plate. The air distribution plate is provided with an air distribution cavity, which is connected with the nozzle 10 and the high-temperature air inlet 5. The nozzle 10 is located on the upper surface of the air distribution plate. The high-temperature air enters the air distribution cavity through the high-temperature air port, and then enters the top of the air distribution plate through the nozzle 10. The high-temperature air burns the oil adsorbed by the clay, thereby achieving the purpose of removing the oil adsorbed by the clay. In addition, the high-temperature air fully disperses the waste clay, avoids the aggregation of the waste clay, and fully burns the oil in the waste clay. In this embodiment, the shape of the air distribution plate is the same as the cross-sectional shape of the corresponding reactor installation position, both of which are circular.

[0027] A plurality of groups of nozzles 10 are arranged on the upper surface of the air distribution plate from the inside to the outside. In this embodiment, 8 groups of nozzles 10 are arranged. Each group of nozzles 10 is evenly distributed on the air distribution plate in an annular manner, and at least one group of evenly distributed nozzles 10 is arranged tilted toward each other. The nozzles 10 are arranged tilted relative to each other. When the two airflows are opposite to each other, they will intersect, collide and interact with each other, resulting in mixing or stirring of the airflows, and then stirring and dispersing the airflow above the air distribution plate, so that the material is fully in contact with the high-temperature air, further ensuring the oil removal effect in the waste clay.

[0028] The nozzle 10 at the edge of the air distribution plate faces the tangent direction of the air distribution plate. The nozzle 10 is arranged along the tangent direction of the air distribution plate, so that the airflow ejected by the nozzle 10 spirals upward along the reactor wall, and then the smoke from the reactor can enter the cyclone separator along the tangent direction of the cyclone separator. In this way, the separation effect is better and the separation speed is faster when combined with the cyclone separator.

[0029] The edge of the upper surface of the air distribution plate is concave toward the middle. In this way, the middle part is lower than the edge, which facilitates the material to flow toward the middle and discharge, and avoids the processed material from staying at the edge of the air distribution plate as much as possible. In this embodiment, the air distribution plate is specifically disc-shaped or arc-shaped or inwardly concave.

[0030] Among them, multiple groups of feed pipes 9 are arranged on the air distribution plate from the inside to the outside, and each group of feed pipes 9 is evenly distributed on the air distribution plate in a ring shape. The distance between the feed pipes 9 in each group and the distance between the nozzles 10 in each group gradually increase from the inside to the outside of the air distribution plate.

[0031] The discharge area at the bottom of the reactor is cone-shaped, and an electric valve 8 for controlling the discharge port is provided at the discharge port at the bottom of the reactor. A high-level material gauge 6 and a low-level material gauge 7 are provided on the reactor, and the high-level material gauge 6 and the low-level material gauge 7 are located between the electric valve 8 and the air distribution plate. When the height of the treated clay in the reactor is at the low-level material gauge 7, the electric valve 8 is controlled to close the discharge port, and when the height of the treated clay in the reactor is at the high-level material gauge 6, the electric valve 8 is controlled to open the discharge port. By setting high and low-level material gauges, the accumulation height of the clay in the discharge area of ​​the reactor is automatically obtained, and the interlocking with the electric valve 8 is established, so as to realize the system discharge automation, which is more convenient and easy to operate.

[0032] The specific implementation process is as follows:

[0033] The high-temperature air (temperature controlled at 500-600°C) heated by the heating furnace enters the air distribution plate through the high-temperature air inlet 5, and then enters the reactor air distribution area through the air distribution cavity and the nozzle 10, and the high-temperature air is evenly distributed in the reactor through the nozzle 10. After the system is stable, the oil-containing waste clay enters the reactor through the waste clay inlet 4 and is fully mixed with the high-temperature air to remove the oil adsorbed by the clay. The dust-containing flue gas enters the cyclone separator through the exhaust port at the top of the reactor, and the separated dust is discharged through the cyclone separator dust outlet 3, and the flue gas is discharged through the cyclone separator outlet 1 of the cyclone separator. The clay after the oil is completely removed enters the discharge area at the bottom of the reactor through the discharge pipe 9. When the clay in the discharge area reaches the high material level, the electric valve 8 opens to discharge the clay into the collection tank. When the clay in the discharge area reaches the low material level, the electric valve 8 is closed to stop discharging.

[0034] This solution treats the oil-containing waste clay after extraction, and uses high-temperature air to completely burn the oil adsorbed by the clay and restore its adsorption performance, thereby reducing the operating costs of related enterprises; by arranging a nozzle 10 and a discharge pipe 9 on the air distribution plate, the gas can be distributed more evenly in the bubbling bed, thereby improving the utilization rate of heat and avoiding the accumulation of materials in the reaction zone of the regeneration device; by arranging a level meter in the cone bucket and establishing an interlock with the electric valve 8, the system discharge automation is realized.

[0035] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, several variations and improvements can be made without departing from the technical solution of the present invention. In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A device for regenerating waste clay, characterized in that: include: A reactor and an air distribution plate, wherein the side wall of the reactor is provided with a waste clay inlet and a high-temperature air inlet, the air distribution plate is installed in the reactor, the waste clay inlet is located above the air distribution plate, the air distribution plate is provided with a nozzle and a feed pipe passing through the air distribution plate, an air distribution cavity is provided in the air distribution plate, the air distribution cavity is connected with the nozzle and the high-temperature air inlet, and the nozzle is located on the upper surface of the air distribution plate.

2. The device for regenerating waste clay according to claim 1, characterized in that: The upper surface of the air distribution plate is provided with a plurality of groups of nozzles from the inside to the outside, each group of nozzles is evenly distributed in an annular pattern on the air distribution plate, and at least one group of evenly distributed nozzles is tilted toward each other.

3. The device for regenerating waste clay according to claim 1, characterized in that: The edge of the upper surface of the air distribution plate is recessed toward the middle thereof.

4. The device for regenerating waste clay according to claim 1, characterized in that: The invention also comprises a cyclone separator, wherein the inlet of the cyclone separator is communicated with the exhaust port of the reactor.

5. The device for regenerating waste clay according to claim 4, characterized in that: The diameter of the cyclone separator inlet gradually decreases along its air inlet direction.

6. The device for regenerating waste clay according to claim 4, characterized in that: The cyclone separator inlet is arranged along the tangential direction of the cyclone separator.

7. The device for regenerating waste clay according to claim 4, characterized in that: The nozzles at the edge of the air distribution plate face the tangent direction of the air distribution plate.

8. The device for regenerating waste clay according to claim 1, characterized in that: The waste clay inlet is arranged obliquely on the reactor.

9. The device for regenerating waste clay according to claim 1, characterized in that: An electric valve for controlling the discharge port is provided at the discharge port at the bottom of the reactor, and a high-level meter and a low-level meter are provided on the reactor, wherein the high-level meter and the low-level meter are located between the electric valve and the air distribution plate.

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