Production equipment and method for producing modified carclazyte based on waste heat drying

Abstract

The invention relates to the technical field of drying, in particular to production equipment and method for producing modified carclazyte based on waste heat drying, the production equipment comprises a heat exchange cylinder, a bottom plate and a partition plate are fixedly connected to the bottom and the middle of an inner cavity of the heat exchange cylinder respectively, and a piston matched with the heat exchange cylinder is slidably arranged in the inner cavity of the upper portion of the heat exchange cylinder; a limiting baffle ring fixedly connected with the inner wall of the heat exchange cylinder is arranged on the lower side edge of the piston, a discharging pipe fixedly penetrates through the middle of the piston, and a lower end inner cavity of the discharging pipe communicates with the middle of an inner cavity of the heat exchange cylinder. The device has the beneficial effects that the smoke cylinder and the outer cylinder are sequentially arranged on the outer side of the heat exchange cylinder in a sleeving mode, the bottom plate, the partition plate and the piston are sequentially arranged in an inner cavity of the heat exchange cylinder from bottom to top, the inner cavity of the heat exchange cylinder is divided into an upper part, a middle part and a lower part, and the material through holes are formed in the edge of the surface of the partition plate in a penetrating mode; according to the device, heat of waste heat flue gas is fully utilized to conduct non-contact heat exchange drying on the modified clay, energy waste is avoided, and meanwhile the modified clay cannot be polluted.

Description

Technical Field

[0001] This invention relates to the field of drying technology, specifically to a production equipment and method for producing modified clay based on waste heat drying. Background Technology

[0002] Modified clay is an important adsorbent widely used in oil decolorization, petrochemicals, environmental protection and other fields. Drying is a crucial step in its production process, which directly affects the activity, adsorption performance and final quality of the product. The drying of modified clay is usually achieved by using an independent hot air furnace or electric heating equipment to provide the heat source.

[0003] In the prior art, Chinese invention with publication number CN103256791B discloses an activated clay drying system, in which a hot air furnace is placed at the discharge end of the drying kiln, and a blower is provided at the discharge end to send hot air into the drying kiln, or an induced draft fan is provided at the feed end of the drying kiln; so that the material conveying direction in the drying kiln is opposite to the hot air transmission direction.

[0004] Currently, the production process of modified bleaching clay generates a large amount of waste heat flue gas (such as boiler emissions, kiln exhaust, and chemical reactions). Because this flue gas pollutes the modified bleaching clay, it cannot directly contact the clay for heat exchange and is often directly emitted, resulting in energy waste and thermal pollution of the surrounding environment. Therefore, this invention proposes a production equipment and method for producing modified bleaching clay based on waste heat drying to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a production equipment and method for producing modified clay based on waste heat drying, so as to solve the problem mentioned in the background art that the waste heat flue gas generated in the production process of modified clay is often directly discharged, resulting in energy waste.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a production equipment for producing modified clay based on waste heat drying, comprising: A heat exchange cylinder has a bottom plate and a partition plate fixedly connected to its inner cavity at the bottom and middle, respectively. A piston adapted to the piston is slidably installed in the upper inner cavity of the heat exchange cylinder. A spiral elastic heat exchange tube is installed between the piston and the partition plate. Rigid tubes are fixedly connected to both the upper and lower ends of the elastic heat exchange tube, and the two rigid tubes are fixedly connected to the piston and the partition plate, respectively. A flue gas cylinder and an outer cylinder are sequentially sleeved on the outside of the heat exchange cylinder. The rigid tube located below the rigid tube penetrates the inner wall of the heat exchange cylinder and communicates with the inner cavity of the flue gas cylinder. An air nozzle is fixedly connected to the lower part of the inner wall of the heat exchange cylinder, and the air nozzle communicates with the outer cylinder and the inner cavity of the heat exchange cylinder. A material passage hole is provided through the edge of the partition surface. A limiting ring is provided on the lower edge of the piston and is fixedly connected to the inner wall of the heat exchange cylinder. A discharge pipe is fixedly connected through the middle of the piston. The lower end of the discharge pipe is connected to the middle of the inner cavity of the heat exchange cylinder. A one-way valve is provided in both the inner cavity of the discharge pipe and the inner cavity of the jet nozzle.

[0007] Preferably, the bottom plate has an upward convex shape in the middle, forming a frustum. A feed cylinder is fixedly and through the middle of the bottom plate. A spiral conveying blade is rotatably installed in the inner cavity of the feed cylinder. The spiral conveying blade transports the modified clay from bottom to top into the bottom of the inner cavity of the heat exchange cylinder.

[0008] Preferably, a sealing plate is provided at the upper opening of the feed cylinder to press down and seal it. A compression spring is provided between the upper surface of the sealing plate and the partition, and the upper and lower ends of the compression spring are respectively fixedly connected to the partition and the sealing plate.

[0009] Preferably, the jet nozzles are horizontally arranged and form an 80-degree angle with the radial direction of the heat exchange cylinder. Multiple jet nozzles are provided and distributed in a ring array on the inner wall of the heat exchange cylinder.

[0010] Preferably, the feed hole is inclined in the circumferential direction of the partition plate, and the surface of the partition plate is provided with mounting holes for rigid tubes to pass through. Multiple feed holes, mounting holes and flexible heat exchange tubes are provided and are distributed in a ring array on the partition plate.

[0011] Preferably, a hollow ring is provided above the piston, and the hollow ring is fixedly sleeved on the outside of the discharge pipe. A rigid tube located on the upper side of the elastic heat exchange tube is fixedly connected to the hollow ring, and the inner cavity of the rigid tube communicates with the inner cavity of the hollow ring. A flue gas outlet pipe is provided above the hollow ring, and the flue gas outlet pipe and the inner cavity of the hollow ring are kept in communication through a flexible tube.

[0012] Preferably, both the flue and the inner cavity of the outer cylinder are sealed, and both the inner walls of the flue and the outer cylinder are fixedly connected with spiral guide vanes, with the spiral directions of the two spiral guide vanes being opposite. The upper part of the flue is connected to a flue gas inlet pipe, and the upper end face of the outer cylinder is provided with an air inlet slot.

[0013] Preferably, a connecting collar is fixedly sleeved on the outer side of the upper end of the discharge pipe, and an extension arm is fixedly connected to the outer side of the connecting collar. A limiting groove is horizontally opened through the surface of the extension arm, and a pin is slidably installed in the inner cavity of the limiting groove. One end of the pin is fixedly connected to a turntable, and the pin is located at the edge of the turntable. The turntable is driven to rotate by an external motor.

[0014] A method for producing modified kaolin using the aforementioned waste heat drying-based production equipment specifically includes the following steps: Step 1: The spiral conveyor blades rotate and transport the powdered modified clay from bottom to top. The modified clay pushes open the sealing plate and enters the bottom of the heat exchange cylinder cavity. The modified clay falls onto the upper surface of the bottom plate and falls down along the inclined surface of the bottom plate, accumulating at the edge of the bottom plate. Step 2: When the high-temperature flue gas flows, it passes through the flue gas inlet pipe, the inner cavity of the flue gas cylinder, the rigid pipe below the elastic heat exchange tube, the elastic heat exchange tube, and the rigid pipe above the elastic heat exchange tube in sequence, and finally gathers in the inner cavity of the hollow ring and is discharged from the flexible pipe and the flue gas outlet pipe. Step 3: When the turntable rotates, it drives the discharge pipe and piston to move up and down reciprocally. When the piston moves up, the one-way valve in the discharge pipe cavity closes and the one-way valve in the jet nozzle cavity opens. The gas in the outer cylinder cavity is drawn into the bottom of the heat exchange cylinder cavity through the jet nozzle. The gas impacts the modified clay at the edge of the bottom plate, causing the modified clay to float. The air mixes with the modified clay and passes through the feed hole into the space between the piston and the partition. The modified clay and air rotate and flow in the middle of the heat exchange cylinder cavity, and both exchange heat with the elastic heat exchange tube to achieve the drying of the modified clay. Step 4: When the piston moves down, the one-way valve in the discharge pipe opens and the one-way valve in the jet nozzle closes. At this time, the air and modified clay in the middle of the heat exchange cylinder are discharged from the discharge pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention features a flue gas cylinder and an outer cylinder sequentially fitted around the outside of a heat exchange cylinder. The inner cavity of the heat exchange cylinder, from bottom to top, is divided into upper, middle, and lower sections. A material passage hole is provided through the edge of the partition. The lower inner cavity of the heat exchange cylinder is connected to the inner cavity of the outer cylinder via a jet nozzle. A spiral-shaped elastic heat exchange tube is installed between the piston and the partition. The lower end of the elastic heat exchange tube is connected to the inner cavity of the flue gas cylinder via a rigid pipe. The waste heat flue gas in the inner cavity of the flue gas cylinder simultaneously exchanges heat with the clean air in both the inner and outer cylinders. When the waste heat flue gas flows into the inner cavity of the elastic heat exchange tube, it further exchanges heat with the rotating, floating modified clay in the middle inner cavity of the heat exchange cylinder, thereby improving the drying effect of the modified clay. This device fully utilizes the heat from the waste heat flue gas to perform non-contact heat exchange drying of the modified clay, avoiding energy waste and preventing contamination of the modified clay. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention; Figure 3 This is a three-dimensional schematic diagram of the extension arm structure of the present invention; Figure 4 This is a partial cross-sectional view of the partition structure of the present invention; Figure 5This is a three-dimensional schematic diagram of the elastic heat exchange tube structure of the present invention; Figure 6 This is a partial cross-sectional view of the base plate structure of the present invention.

[0017] In the diagram: 1. Heat exchanger cylinder; 11. Base plate; 111. Feed cylinder; 112. Spiral conveyor blade; 12. Baffle plate; 121. Material passage hole; 122. Mounting hole; 13. Limiting ring; 14. Air nozzle; 2. Piston; 21. Discharge pipe; 22. Connecting collar; 23. Extension arm; 231. Limiting groove; 24. Pin shaft; 241. Turntable; 3. Flue gas cylinder; 31. Flue gas inlet pipe; 34. Spiral guide vane; 4. Outer cylinder; 41. Air inlet slot; 5. Elastic heat exchange tube; 51. Rigid tube; 52. Hollow ring; 53. Flue gas outlet pipe; 54. Flexible tube; 6. Sealing pressure plate; 61. Compression spring. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1 to 6 The present invention provides a technical solution: Example 1: A production equipment for producing modified clay based on waste heat drying, comprising: heat exchange cylinder 1.

[0020] Specifically, a base plate 11 and a partition plate 12 are fixedly connected to the bottom and middle of the inner cavity of the heat exchange cylinder 1, respectively. A piston 2 is slidably arranged in the upper inner cavity of the heat exchange cylinder 1. The partition plate 12 and the piston 2 are used to divide the inner cavity of the heat exchange cylinder 1 into three parts: upper, middle and lower. Since the piston 2 can slide up and down, while the position of the partition plate 12 is fixed, the volume of the lower inner cavity of the heat exchange cylinder 1 is constant. The volumes of the upper and middle inner cavities of the heat exchange cylinder 1 will change as the piston 2 slides up and down. When the piston 2 slides up, the volume of the middle inner cavity of the heat exchange cylinder 1 increases and the air pressure decreases. Conversely, when the piston 2 slides down, the volume of the middle inner cavity of the heat exchange cylinder 1 decreases and the air pressure increases. Secondly, a limiting ring 13 is provided on the lower edge of the piston 2 and fixedly connected to the inner wall of the heat exchange cylinder 1 to limit the sliding stroke of the piston 2. A spiral elastic heat exchange tube 5 is provided between the piston 2 and the partition plate 12. Both the upper and lower ends of the elastic heat exchange tube 5 are fixedly connected to rigid tubes 51, and the two rigid tubes 51 are fixedly connected to the piston 2 and the partition plate 12 respectively. The elastic heat exchange tube 5 itself can undergo elastic deformation to adapt to the up and down sliding of the piston 2. A flue gas cylinder 3 and an outer cylinder 4 are sequentially sleeved on the outside of the heat exchange cylinder 1. The rigid tube 51 located below the rigid tube 51 penetrates the inner wall of the heat exchange cylinder 1 and communicates with the inner cavity of the flue gas cylinder 3. A jet nozzle 14 is fixedly connected to the lower part of the inner wall of the heat exchange cylinder 1. The jet nozzle 14 connects the outer cylinder 4 and the heat exchange tube 12. The inner cavity of cylinder 1 has a through hole 121 at the edge of the surface of the partition plate 12. Air in the inner cavity of the outer cylinder 4 can pass through the jet nozzle 14 into the bottom of the inner cavity of the heat exchange cylinder 1, and then enter the middle of the inner cavity of the heat exchange cylinder 1 through the through hole 121. When the high temperature flue gas in the inner cavity of the flue gas cylinder 3 flows, it enters the inner cavity of the elastic heat exchange tube 5 through the rigid tube 51 on the lower side of the elastic heat exchange tube 5, and then exits through the rigid tube 51 on the upper side of the elastic heat exchange tube 5. Therefore, the high temperature flue gas in the inner cavity of the flue gas cylinder 3 can simultaneously perform non-contact heat exchange with the air in the inner cavities of the outer cylinder 4 and the heat exchange cylinder 1. At the same time, after the high temperature flue gas enters the inner cavity of the elastic heat exchange tube 5, it can also perform further non-contact heat exchange with the air in the middle inner cavity of the heat exchange cylinder 1, so that the residual heat in the high temperature flue gas can be fully utilized. Furthermore, a discharge pipe 21 is fixedly connected through the middle of the piston 2. The lower end of the discharge pipe 21 is connected to the middle of the inner cavity of the heat exchange cylinder 1. Both the inner cavity of the discharge pipe 21 and the inner cavity of the jet nozzle 14 are equipped with one-way valves. The discharge pipe 21 is mainly used to discharge the air and modified clay mixture in the middle inner cavity of the heat exchange cylinder 1 together. The one-way valve is mainly used to control the opening and closing of the discharge pipe 21 and the inner cavity of the jet nozzle 14. Since the high-temperature flue gas does not enter the inner cavity of the heat exchange cylinder 1, the normal flow of the high-temperature flue gas is not affected when the piston 2 slides up and down. The high-temperature flue gas flows steadily and slowly through the inner cavity of the flue gas cylinder 3, the rigid tube 51 below the elastic heat exchange tube 5, the inner cavity of the elastic heat exchange tube 5, and the elastic heat exchange tube 5 above the elastic heat exchange tube 5. The modified clay accumulates at the bottom of the inner cavity of the heat exchange cylinder 1. ① When the piston 2 slides up, the air pressure in the middle inner cavity of the heat exchange cylinder 1 decreases. The air in the inner cavity of the outer cylinder 4 is injected into the bottom inner cavity of the heat exchange cylinder 1 through the jet nozzle 14 and impacts the powdered modified clay. The air and modified clay mixture pass through the feed hole 121 and enter the middle inner cavity of the heat exchange cylinder 1. ② When the piston 2 slides down, the air pressure in the middle inner cavity of the heat exchange cylinder 1 increases. The air and modified clay mixture pass through the one-way valve in the inner cavity of the discharge pipe 21 and are discharged from the top of the discharge pipe 21. The modified clay is then transported to the next process by the external hose.

[0021] In order to convey the modified clay into the bottom of the heat exchange cylinder 1, this application also has a frustum-shaped structure that protrudes upward in the middle of the base plate 11. A feed cylinder 111 is fixedly connected through the middle of the base plate 11. A spiral conveying blade 112 is rotatably installed in the inner cavity of the feed cylinder 111. The spiral conveying blade 112 conveys the modified clay from bottom to top into the bottom of the inner cavity of the heat exchange cylinder 1. When the spiral conveying blade 112 is working, it can convey the powdered modified clay from bottom to top into the bottom of the inner cavity of the heat exchange cylinder 1. The modified clay falls on the surface of the base plate 11 and falls along the inclined surface of the base plate 11, eventually accumulating at the edge of the base plate 11, so that the gas ejected from the nozzle 14 can directly impact the powdered modified clay, causing the modified clay to mix with the air.

[0022] To prevent gas from leaking from the feed cylinder 111 at the bottom of the inner cavity of the heat exchange cylinder 1, this application also includes a sealing plate 6 at the upper opening of the feed cylinder 111 to press down and seal it. A compression spring 61 is provided between the upper surface of the sealing plate 6 and the partition 12, and the upper and lower ends of the compression spring 61 are respectively fixedly connected to the partition 12 and the sealing plate 6. The compression spring 61 and the sealing plate 6 are used to seal the upper opening of the feed cylinder 111. Since the middle inner cavity and the bottom inner cavity of the heat exchange cylinder 1 are connected through the feed hole 121, when the gas pressure in the middle inner cavity of the heat exchange cylinder 1 increases, the gas pressure in the bottom inner cavity of the heat exchange cylinder 1 will also increase. At this time, the presence of the sealing plate 6 can prevent gas from leaking from the inner cavity of the feed cylinder 111. When the spiral conveyor blade 112 conveys the modified clay upward, the modified clay can automatically push open the sealing plate 6 to ensure that the inner cavity of the heat exchange cylinder 1 always contains modified clay.

[0023] To ensure a more uniform mixing of the gas and the powdered modified clay, the nozzles 14 of this application are horizontally positioned, forming an 80-degree angle with the radial direction of the heat exchange cylinder 1. Multiple nozzles 14 are provided and arranged in a ring array on the inner wall of the heat exchange cylinder 1. Figure 6 As shown, after the nozzle 14 injects gas into the bottom of the heat exchange cylinder 1, the gas can flow in a spiral shape at the bottom of the heat exchange cylinder 1, thereby ensuring that a uniform mixture can be formed between the gas and the powdered modified clay.

[0024] In order to ensure that the modified clay in the inner cavity of the heat exchanger 1 is fully dried, the feed hole 121 of this application is inclined in the circumferential direction of the partition plate 12, and the structure of the feed hole 121 is as follows: Figure 4 As shown, combined with Figure 2As shown, when the gas and modified clay mixture in the bottom cavity of the heat exchange cylinder 1 enter the middle cavity of the heat exchange cylinder 1 through the feed hole 121, the gas and modified clay mixture can flow in a vortex shape in the middle cavity of the heat exchange cylinder 1, thereby fully exchanging heat with the elastic heat exchange tube 5 to accelerate the drying of the modified clay. The partition plate 12 has an installation hole 122 for the rigid tube 51 to pass through, so as to facilitate the installation and fixing of the rigid tube 51. There are multiple feed holes 121, installation holes 122 and elastic heat exchange tubes 5, which are arranged in a ring array on the partition plate 12. The arrangement of multiple elastic heat exchange tubes 5 can improve the drying effect of the modified clay in the middle cavity of the heat exchange cylinder 1.

[0025] To exhaust the high-temperature flue gas, this application also includes a hollow ring 52 disposed above the piston 2, and the hollow ring 52 is fixedly sleeved on the outside of the discharge pipe 21. A rigid pipe 51 located on the upper side of the elastic heat exchange tube 5 is fixedly connected to the hollow ring 52, and the inner cavity of the rigid pipe 51 is connected to the inner cavity of the hollow ring 52. The hollow ring 52 is used to collect and connect multiple elastic heat exchange tubes 5. A flue gas outlet pipe 53 is disposed above the hollow ring 52. The flue gas outlet pipe 53 is connected to the inner cavity of the hollow ring 52 through a flexible pipe 54. After the high-temperature flue gas enters the inner cavity of the hollow ring 52, it is finally discharged from the flue gas outlet pipe 53. The flexible pipe 54 is provided to accommodate the up and down sliding of the piston 2.

[0026] To ensure sufficient heat exchange between the air and the high-temperature flue gas, the inner cavities of both the flue gas stack 3 and the outer stack 4 in this application are kept sealed, such as... Figure 1 and Figure 2 As shown, there is a gap between the outer cylinder 4 and the flue gas cylinder 3, and a gap between the flue gas cylinder 3 and the heat exchange cylinder 1. Spiral guide vanes 34 are fixedly connected to the inner walls of both the flue gas cylinder 3 and the outer cylinder 4, with the two spiral guide vanes 34 rotating in opposite directions. A flue gas inlet pipe 31 connects to the upper part of the flue gas cylinder 3, and an air inlet slot 41 is opened on the upper end face of the outer cylinder 4. The flue gas inlet pipe 31 is mainly used to send high-temperature flue gas into the upper part of the inner cavity of the flue gas cylinder 3. The two spiral guide vanes 34 are respectively used to guide the high-temperature flue gas in the inner cavity of the flue gas cylinder 3 and the inner cavity of the outer cylinder 4. The air is guided to flow, and the high-temperature flue gas inside the flue gas cylinder 3 flows from top to bottom in a positive spiral shape. After the external air enters the upper part of the inner cavity of the outer cylinder 4 through the air inlet 41, it flows from top to bottom in a negative spiral shape inside the outer cylinder 4. It can be seen that when the high-temperature flue gas flows inside the flue gas cylinder 3, it can exchange heat with the air inside the outer cylinder 4 and the air inside the heat exchange cylinder 1 at the same time, so as to ensure that the air in direct contact with the modified clay also has a certain temperature. This setting can further improve the drying effect of the modified clay.

[0027] To drive the discharge pipe 21 to move up and down reciprocally, this application further includes a connecting collar 22 fixedly sleeved on the outer side of the upper end of the discharge pipe 21. An extension arm 23 is fixedly connected to the outer side of the connecting collar 22. A limiting groove 231 is horizontally opened through the surface of the extension arm 23. A pin 24 is slidably installed in the inner cavity of the limiting groove 231. One end of the pin 24 is fixedly connected to a turntable 241, and the pin 24 is located at the edge of the turntable 241. The turntable 241 is driven to rotate by an external motor. Figure 1 and Figure 3 As shown, when the turntable 241 rotates, the cooperation between the pin 24 and the extension arm 23 can drive the discharge pipe 21 to slide up and down in the vertical direction.

[0028] This invention also discloses a method for producing modified kaolin using the aforementioned waste heat drying-based production equipment, specifically comprising the following steps: Step 1: The spiral conveyor blade 112 rotates and conveys the powdered modified clay from bottom to top. The modified clay pushes open the sealing plate 6 and enters the bottom of the heat exchange cylinder 1. The modified clay falls on the upper surface of the bottom plate 11 and falls down along the inclined surface of the bottom plate 11, accumulating at the edge of the bottom plate 11. Step 2: When the high-temperature flue gas flows, it passes through the flue gas inlet pipe 31, the inner cavity of the flue gas cylinder 3, the rigid pipe 51 below the elastic heat exchange tube 5, the elastic heat exchange tube 5, and the rigid pipe 51 above the elastic heat exchange tube 5 in sequence, and finally gathers in the inner cavity of the hollow ring 52 and is discharged from the flexible pipe 54 and the flue gas outlet pipe 53. Step 3: When the turntable 241 rotates, it drives the discharge pipe 21 and piston 2 to move up and down reciprocally. When piston 2 moves up, the one-way valve in the inner cavity of discharge pipe 21 closes and the one-way valve in the inner cavity of jet nozzle 14 opens. The gas in the inner cavity of outer cylinder 4 is drawn into the bottom of the inner cavity of heat exchange cylinder 1 through jet nozzle 14. The gas impacts the modified clay at the edge of bottom plate 11, causing the modified clay to float. The air mixes with the modified clay and passes through the feed hole 121 into the space between piston 2 and partition plate 12. The modified clay and air rotate and flow in the middle of the inner cavity of heat exchange cylinder 1, and both exchange heat with the elastic heat exchange tube 5 to achieve the drying of modified clay. Step 4: When piston 2 moves down, the one-way valve in the inner cavity of discharge pipe 21 opens and the one-way valve in the inner cavity of jet nozzle 14 closes. At this time, the air and modified clay in the middle of the inner cavity of heat exchange cylinder 1 are discharged from the inner cavity of discharge pipe 21.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A production equipment for producing modified clay based on waste heat drying, characterized in that: include: A heat exchange cylinder (1) has a bottom plate (11) and a partition plate (12) fixedly connected to the bottom and middle of its inner cavity, respectively. A piston (2) is slidably arranged in the upper inner cavity of the heat exchange cylinder (1). A spiral elastic heat exchange tube (5) is arranged between the piston (2) and the partition plate (12). A rigid tube (51) is fixedly connected to both the upper and lower ends of the elastic heat exchange tube (5). The two rigid tubes (51) are fixedly connected to the piston (2) and the partition plate (12) respectively. A flue gas cylinder (3) and an outer cylinder (4) are sequentially sleeved on the outside of the heat exchange cylinder (1). The rigid tube (51) located below the rigid tube (51) penetrates the inner wall of the heat exchange cylinder (1) and communicates with the inner cavity of the flue gas cylinder (3). A jet nozzle (14) is fixedly connected to the lower part of the inner side wall of the heat exchange cylinder (1). The jet nozzle (14) communicates with the outer cylinder (4) and the inner cavity of the heat exchange cylinder (1). A material passage hole (121) is provided through the edge of the surface of the partition plate (12). A limiting ring (13) is provided on the lower edge of the piston (2) and is fixedly connected to the inner wall of the heat exchange cylinder (1). A discharge pipe (21) is fixedly connected through the middle of the piston (2). The lower end of the discharge pipe (21) is connected to the middle of the inner cavity of the heat exchange cylinder (1). A one-way valve is provided in both the inner cavity of the discharge pipe (21) and the inner cavity of the jet nozzle (14).

2. The production equipment for producing modified clay based on waste heat drying according to claim 1, characterized in that: The bottom plate (11) is raised upward in the middle to form a frustum shape. A feed cylinder (111) is fixedly connected through the middle of the bottom plate (11). A spiral conveying blade (112) is rotatably installed in the inner cavity of the feed cylinder (111). The spiral conveying blade (112) conveys the modified clay from bottom to top into the bottom of the inner cavity of the heat exchange cylinder (1).

3. The production equipment for producing modified clay based on waste heat drying according to claim 2, characterized in that: The upper opening of the feed cylinder (111) is provided with a sealing plate (6) for pressing and sealing it. A compression spring (61) is provided between the upper surface of the sealing plate (6) and the partition (12), and the upper and lower ends of the compression spring (61) are respectively fixedly connected to the partition (12) and the sealing plate (6).

4. The production equipment for producing modified clay based on waste heat drying according to claim 3, characterized in that: The jet nozzle (14) is horizontally arranged and forms an 80-degree angle with the radial direction of the heat exchange cylinder (1). Multiple jet nozzles (14) are provided and are distributed in a ring array on the inner wall of the heat exchange cylinder (1).

5. The production equipment for producing modified clay based on waste heat drying according to claim 4, characterized in that: The feed hole (121) is inclined in the circumferential direction of the partition (12). The surface of the partition (12) is provided with mounting holes (122) for the rigid tube (51) to pass through. There are multiple feed holes (121), mounting holes (122) and elastic heat exchange tubes (5), and they are arranged in a ring array on the partition (12).

6. The production equipment for producing modified clay based on waste heat drying according to claim 5, characterized in that: A hollow ring (52) is provided above the piston (2), and the hollow ring (52) is fixedly sleeved on the outside of the discharge pipe (21). The rigid pipe (51) located on the upper side of the elastic heat exchange pipe (5) is fixedly connected to the hollow ring (52), and the inner cavity of the rigid pipe (51) is connected to the inner cavity of the hollow ring (52). A flue gas outlet pipe (53) is provided above the hollow ring (52), and the flue gas outlet pipe (53) and the inner cavity of the hollow ring (52) are connected by a flexible pipe (54).

7. The production equipment for producing modified clay based on waste heat drying according to claim 6, characterized in that: The inner cavities of the flue gas cylinder (3) and the outer cylinder (4) are both sealed. The inner walls of the flue gas cylinder (3) and the outer cylinder (4) are fixedly connected with spiral guide vanes (34), and the spiral directions of the two spiral guide vanes (34) are opposite. The upper part of the flue gas cylinder (3) is connected to the flue gas inlet pipe (31), and the upper end face of the outer cylinder (4) is provided with an air inlet slot (41).

8. The production equipment for producing modified clay based on waste heat drying according to claim 7, characterized in that: A connecting collar (22) is fixedly sleeved on the outer side of the upper end of the discharge pipe (21). An extension arm (23) is fixedly connected to the outer side of the connecting collar (22). A limiting groove (231) is horizontally opened through the surface of the extension arm (23). A pin (24) is slidably installed in the inner cavity of the limiting groove (231). A turntable (241) is fixedly connected to one end of the pin (24), and the pin (24) is located at the edge of the turntable (241). The turntable (241) is driven to rotate by an external motor.

9. A method for producing modified kaolin using the waste heat drying production equipment described in claim 8, characterized in that: Specifically, the following steps are included: Step 1: The spiral conveyor blade (112) rotates and conveys the powdered modified clay from bottom to top. The modified clay pushes open the sealing plate (6) and enters the bottom of the heat exchange cylinder (1). The modified clay falls on the upper surface of the bottom plate (11) and falls down along the inclined surface of the bottom plate (11) and accumulates at the edge of the bottom plate (11). Step 2: When the high-temperature flue gas flows, it passes through the flue gas inlet pipe (31), the inner cavity of the flue gas cylinder (3), the rigid pipe (51) below the elastic heat exchange tube (5), the elastic heat exchange tube (5), and the rigid pipe (51) above the elastic heat exchange tube (5) in sequence, and finally gathers in the inner cavity of the hollow ring (52) and is discharged from the flexible pipe (54) and the flue gas outlet pipe (53); Step 3: When the turntable (241) rotates, it drives the discharge pipe (21) and piston (2) to move up and down repeatedly. When the piston (2) moves up, the one-way valve in the inner cavity of the discharge pipe (21) closes and the one-way valve in the inner cavity of the jet nozzle (14) opens. The gas in the inner cavity of the outer cylinder (4) is sucked into the bottom of the inner cavity of the heat exchange cylinder (1) through the jet nozzle (14). The gas impacts the modified clay at the edge of the bottom plate (11), causing the modified clay to float. The air mixes with the modified clay and passes through the feed hole (121) into the space between the piston (2) and the partition plate (12). The modified clay and air rotate and flow in the middle of the inner cavity of the heat exchange cylinder (1), and both exchange heat with the elastic heat exchange tube (5) to achieve the drying of the modified clay. Step 4: When the piston (2) moves down, the one-way valve in the inner cavity of the discharge pipe (21) opens and the one-way valve in the inner cavity of the jet nozzle (14) closes. At this time, the air and modified clay in the middle of the inner cavity of the heat exchange cylinder (1) are discharged from the inner cavity of the discharge pipe (21).

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