Alkali residue dewatering and drying equipment and drying method

Abstract

The invention relates to the technical field of drying equipment, and discloses alkali residue dewatering and drying equipment and a drying method.The alkali residue dewatering and drying equipment comprises a heat preservation box and a rotary drum, the rotary drum is rotationally installed in the heat preservation box, and the rotary drum comprises an inner drum, a middle drum and an outer drum which are sequentially and fixedly connected from inside to outside; according to the alkali residue dewatering and drying equipment, by arranging the rotary drum and the hot-air blower, the fed alkali residues continuously move towards the discharging opening in the drying process, so that the alkali residues can be continuously fed for drying, meanwhile, by arranging the drainage cavity and the water-permeable sieve holes, excessive water in the alkali residues can be separated from solid residues in the alkali residues through the water-permeable sieve holes, and the drying effect is improved. And by arranging a circulating pipe and an air inlet pipe, water vapor brought out of the middle cylinder and the outer cylinder enters the heat preservation box again, heating and heat preservation are conducted on the outer wall of the outer cylinder, and the utilization rate of heat energy is increased.

Description

Technical Field

[0001] The invention relates to the technical field of drying equipment, in particular to alkaline slag dehydration drying equipment and a drying method. Background Art

[0002] Alkali residue refers to the alkaline waste residue discharged during the alkali production and alkali treatment process in industrial production. It includes the waste residue discharged during the ammonium alkali method and the alkaline waste residue discharged from other industrial production processes. The components of alkali residue include calcium carbonate, calcium sulfate, calcium chloride and other calcium salt-based waste residues that are insoluble in water, and also contain a small amount of water-soluble components such as sulfur dioxide. Alkali residue can be mixed with coal ash, sand, lime, etc. to make engineering soil, and can also be used as a desulfurizer for flue gas desulfurization.

[0003] In the prior art, the first step of recycling alkali residues in many alkali plants is to pile the alkali residues in the open air, wait for the sun to evaporate the water in the alkali residue waste liquid, and then collect the remaining solid residues. However, this method can easily cause salinization of the land. At the same time, the particle size of the alkali residues is extremely fine, and the alkali residue powder piled in the open air can easily be drawn into the air and then inhaled by the human body, which is harmful to human health. Therefore, in order to prevent the alkali residues from causing harm to the environment and human body, some places will use industrial drying equipment to dry the alkali residues.

[0004] Chinese patent CN220582963U discloses a alkali residue dehydration device, which drives the screen plate to vibrate through a vibration motor, so that the alkali residue falling on the screen plate is shattered, and the alkali residue is dehydrated and heated through a heating tube and a dryer, so that the collected alkali residue becomes powder.

[0005] However, the above-mentioned device uses the vibration method of the sieve plate to screen the dried alkali slag. In order to avoid the mixing of alkali slags with different humidity levels, the alkali slag can only be put back into the drying machine for drying after the alkali slag is dried, and the alkali slag cannot be put in continuously for drying. At the same time, due to the high water content of the alkali slag, when using this device to dry the alkali slag, the water in the alkali slag may pass through the sieve holes of the sieve plate and fall into the collection box to form liquid accumulation, and the temperature at the bottom of the collection box will be lower than the temperature on the sieve plate. The water falling into the collection box cannot evaporate quickly, and the alkali slag that falls on the sieve plate after drying falls into the water again and is wetted, making it impossible for the alkali slag to be dried in the dryer in one go. Summary of the invention

[0006] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides an alkali slag dehydration and drying device and a drying method, which have the advantages of continuously feeding alkali slag for drying, completing the alkali slag drying in one go, and less heat waste, thereby solving the problems mentioned in the above background technology.

[0007] Technical Solution In order to solve the above technical problems, the present invention provides the following technical solutions: A dehydration and drying device for alkali residues comprises a heat preservation box and a rotating drum, the rotating drum is rotatably installed inside the heat preservation box, the rotating drum comprises an inner drum, a middle drum and an outer drum which are fixedly connected in sequence from the inside to the outside, a feeding hopper and a discharging bin are respectively installed at both ends of the heat preservation box, the discharging end of the feeding hopper is inserted into the interior of one end of the inner drum, the discharging bin is sleeved on the outside of one end of the outer drum, the end of the inner drum away from the feeding hopper is connected with the interior of the middle drum, the end of the outer drum away from the discharging bin is connected with the interior of the middle drum, a discharging port is arranged at the lower end of the discharging bin, a drainage cavity is arranged on the outer surface of the inner drum, the drainage cavity is connected with the inner wall of the inner drum through a water-permeable sieve hole, and a drainage hole which is connected with the interior of the heat preservation box is opened at one end of the drainage cavity, and the A hot air blower is fixedly installed at one end, and the air outlet pipe of the hot air blower passes through the interior of the middle cylinder. A circulation pipe is fixedly connected to the upper end of the discharge bin, and an air inlet pipe connected with the interior thereof is fixedly installed on the circulation pipe, and the air inlet pipe is connected with the inner top of the insulation box, an exhaust pipe is fixedly installed on one side of the top of the insulation box, and a drain pipe is fixedly installed on one side of the bottom of the insulation box. A lifting plate is fixedly installed on the inner walls of the inner cylinder, the middle cylinder and the outer cylinder, and the lifting plate is used to bring up the alkali slag inside when the drum rotates. A scattering shaft is coaxially arranged inside the inner cylinder, and the scattering shaft is used to scatter the solid alkali slag inside the inner cylinder. A driving mechanism is fixedly installed at one end of the insulation box, and the driving mechanism is used to drive the drum and the scattering shaft to rotate at different speeds.

[0008] Preferably, the inner cylinder is a structure with two ends open, the middle cylinder and the outer cylinder are both structures with one end open and the other end closed, and the opening directions of the two are opposite, there is a gap between the closed end of the middle cylinder and the open end of the outer cylinder, the closed end of the outer cylinder is fixedly connected to the outer wall of the inner cylinder, the open end of the outer cylinder extends to the outside of one end of the insulation box, and the inner wall of the open end of the outer cylinder is provided with a spiral guide plate, and the end of the inner cylinder facing the discharge funnel extends to the outside of the other end of the insulation box.

[0009] Preferably, the air outlet pipe of the hot air blower passes through the closed end of the middle cylinder and extends to the interior of the middle cylinder. A wind shield is fixedly installed at one end of the inner cylinder facing the hot air blower. The diameter of the wind shield is not less than the outer diameter of the inner cylinder, and there is a gap between the wind shield and the end of the inner cylinder.

[0010] Preferably, a front support frame and a rear support frame are fixedly installed at both ends of the insulation box, a support plate is fixedly installed on the front support frame, an inclined support plate is fixedly connected between the outer wall of the discharge funnel and the two ends of the upper surface of the support plate, a cross bar is fixedly installed between the outer wall of the discharge bin and the two ends of the rear support frame, guide wheels are symmetrically installed on the front support frame and the rear support frame, and the ends of the inner cylinder and the outer cylinder extending to the outside of the insulation box are respectively rotatably mounted between the two guide wheels on the same side.

[0011] Preferably, an annular baffle is fixedly installed on one end of the inner tube extending to the outside of the insulation box, the inner diameter of the annular baffle is smaller than the inner diameter of the inner tube, the discharge end of the discharge funnel passes through the annular baffle and extends to the interior of the inner tube, and a fixing ring is fixedly installed on the annular baffle.

[0012] Preferably, the driving mechanism includes a motor, a transmission shaft, a transmission swivel and a transmission pulley, the motor is fixedly mounted on the front support frame, the transmission shaft is rotatably mounted on the transmission swivel, the transmission swivel is fixedly mounted on the support plate, the driving shaft of the motor and the transmission shaft are connected via a transmission pulley, a transmission gear is also fixedly mounted on the transmission shaft, and the outer side surface of the fixing ring is provided with outer gear teeth meshing with the transmission gear.

[0013] Preferably, the driving mechanism also includes an intermediate shaft and an intermediate swivel seat, the intermediate shaft is rotatably mounted on the intermediate swivel seat, the intermediate swivel seat is fixedly mounted on the support plate, the breaking up shaft and the intermediate shaft are respectively fixedly mounted with a driven gear and an intermediate gear, the driven gear and the intermediate gear are meshingly connected, and the inner side surface of the fixing ring is provided with internal gear teeth meshingly connected with the intermediate gear.

[0014] Preferably, one end of the breaking up shaft is rotatably connected to the support plate, and the other end of the breaking up shaft is rotatably connected to the windshield plate, and one end of the breaking up shaft is fixedly mounted with impact plates distributed in a rectangular array, and the impact plates are opposite to the lifting plates.

[0015] Preferably, a breaking rod is fixedly mounted on the breaking shaft, and the breaking rod comprises a straight rod and an arc plate, the arc radius of the arc plate is smaller than the radius of the inner cylinder, and the end of the arc plate away from the breaking shaft is close to the inner wall of the inner cylinder.

[0016] The present invention also discloses a method for dehydrating and drying alkali residue, which specifically comprises the following steps: Start the hot air blower to allow the air flow to enter the interior of the alkali residue dehydration and drying equipment, preheat the interior of the alkali residue dehydration and drying equipment, and allow the hot air to pass through the middle cylinder, outer cylinder, discharge bin, circulation pipe, air inlet pipe and insulation box, and finally be discharged from the exhaust pipe; The driving mechanism is started, so that the drum and the breaking shaft start to rotate. When the drum rotates, the lifting plate can lift the solid alkali residue entering the drum to a certain height and make it fall apart. The breaking shaft rotates relative to the inner drum to break up the solid alkali residue in the inner drum. Pour the alkali residue waste liquid into the discharge funnel, so that the alkali residue enters the inner drum. The rotating drum moves the alkali residue from one end of the inner drum to the other end. When the alkali residue moves in the inner drum, the excess water on it enters the drainage cavity through the permeable sieve holes and flows into the inner bottom of the insulation box from the drainage hole. When the alkali residue reaches the other end of the inner cylinder, it falls into the middle cylinder. Then, it moves in the opposite direction in the middle cylinder and falls into the outer cylinder. It moves toward the discharge bin inside the outer cylinder and is finally discharged from the discharge port. At the same time, the hot air blown out by the hot air blower heats the alkali residue after it enters the middle cylinder, so that the alkali residue gradually shows the effect of dehydration and drying during movement.

[0017] Beneficial Effects Compared with the prior art, the present invention provides an alkali residue dehydration and drying device and a drying method, which have the following beneficial effects: 1. The alkali residue dehydration and drying equipment is provided with a rotating drum and a hot air blower. The alkali residue put in is continuously moved toward the discharge port during the drying process, so that the alkali residue can be continuously put in for drying. At the same time, by providing a drainage cavity and a water-permeable sieve hole, the excess moisture in the alkali residue will be separated from the solid residue in the alkali residue through the water-permeable sieve hole, so as to avoid excessive moisture in the rotating drum, resulting in untimely evaporation of moisture, so that the drying equipment can complete the dehydration and drying of the alkali residue at one time. By providing a circulation pipe and an air inlet pipe, the water vapor brought out from the inside of the middle cylinder and the outer cylinder re-enters the inside of the heat preservation box, heats and insulates the outer wall of the outer cylinder, and improves the utilization rate of thermal energy.

[0018] 2. The alkali residue dehydration and drying equipment prolongs the moving distance of the alkali residue inside the drying equipment by arranging an inner cylinder, a middle cylinder and an outer cylinder. By arranging an outlet pipe of a hot air blower to blow air into the middle cylinder, on the one hand, the hot air can enter the outer cylinder from the middle cylinder along the moving direction of the alkali residue, thereby prolonging the action stroke of the hot air and improving the drying effect. On the other hand, the hot air flow does not directly enter the inner cylinder, thereby reducing the probability of water evaporation in the inner cylinder and reducing unnecessary water evaporation.

[0019] 3. The alkali residue dehydration and drying equipment can drive the rotating drum and the breaking shaft to rotate at different speeds by setting a driving mechanism, so that the alkali residue in the inner drum can be broken up better. At the same time, by setting a lifting plate, the alkali residue is continuously lifted up by the rotating drum when it moves inside the rotating drum, so that the hot air has a better drying effect on the alkali residue.

[0020] 4. The alkali residue dehydration and drying method separates water-soluble components such as sulfur dioxide in the alkali residue from the solid residue, so that the water-soluble components such as sulfur dioxide will not remain in the solid alkali residue after the alkali residue is dried, thereby reducing the processing steps for recycling the alkali residue, and will not directly diffuse into the atmosphere to cause pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is one of the three-dimensional structural cross-sectional views of the drying device of the present invention; Figure 2 This is the second sectional view of the three-dimensional structure of the drying equipment of the present invention; Figure 3 This is the third sectional view of the three-dimensional structure of the drying equipment of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure decomposition of the drying equipment of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged local structure at point A in the middle; Figure 6 This is the fourth sectional view of the three-dimensional structure of the drying equipment of the present invention; Figure 7 For the present invention Figure 6 A magnified schematic diagram of the local structure at B in the middle; Figure 8 For the present invention Figure 6 A magnified schematic diagram of the local structure at C in the middle; Fig. 9 This is one of the three-dimensional structural schematic diagrams of the drying equipment of the present invention; Fig.10 This is the second schematic diagram of the three-dimensional structure of the drying equipment of the present invention; Fig.11 This is the fifth three-dimensional structural cross-sectional view of the drying equipment of the present invention.

[0022] In the figure: 1. Insulation box; 11. Feeding hopper; 12. Feeding bin; 13. Circulation pipe; 14. Air inlet pipe; 15. Feeding port; 16. Exhaust pipe; 17. Drain pipe; 18. Front support frame; 19. Rear support frame; 110. Support plate; 111. Diagonal support plate; 112. Cross bar; 113. Guide wheel; 2. Rotating drum; 21. Inner drum; 22. Middle drum; 23. Outer drum; 24. Drainage cavity; 25. Water-permeable sieve hole; 26. Drain hole; 27. Wind shield; 28. Annular baffle; 29. ​​Fixed ring; 210. Spiral guide plate; 3. Hot air blower; 4. Lifting plate; 5. Breaking shaft; 51. Impact plate; 52. Breaking rod; 521. Straight rod; 522. Curved plate; 6. Driving mechanism; 61. Motor; 62. Transmission shaft; 63. Transmission swivel seat; 64. Transmission pulley; 65. Transmission gear; 66. Outer gear; 67. Intermediate shaft; 68. Intermediate swivel seat; 69. Driven gear; 610. Intermediate gear; 611. Inner gear. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Embodiment 1 See also Figure 1 , Figure 4 , Fig. 9 and Fig.10 The present invention provides an alkali residue dehydration and drying device, comprising an insulation box 1 and a rotating drum 2. The rotating drum 2 is rotatably installed in the insulation box 1. The rotating drum 2 comprises an inner drum 21, a middle drum 22 and an outer drum 23 which are fixedly connected in sequence from the inside to the outside. A feeding hopper 11 and a discharging bin 12 are respectively installed at both ends of the insulation box 1. The discharging end of the feeding hopper 11 is inserted into the interior of one end of the inner drum 21. The discharging bin 12 is sleeved on the outside of one end of the outer drum 23. The end of the inner drum 21 away from the feeding hopper 11 is communicated with the interior of the middle drum 22. The end of the outer drum 23 away from the discharging bin 12 is communicated with the interior of the middle drum 22. A discharging port 15 is arranged at the lower end of the discharging bin 12. A drainage cavity 24 is arranged on the outer surface of the inner drum 21. The drainage cavity 24 is communicated with the inner wall of the inner drum 21 through a water-permeable sieve hole 25. One end of the drainage cavity 24 is provided with a Drain hole 26, a hot air blower 3 is fixedly installed at one end of the discharge bin 12, and the outlet pipe of the hot air blower 3 passes through the interior of the middle cylinder 22. A circulation pipe 13 is fixedly connected to the upper end of the discharge bin 12, and an air inlet pipe 14 connected to the interior of the circulation pipe 13 is fixedly installed. The air inlet pipe 14 is connected to the inner top of the insulation box 1, and an exhaust pipe 16 is fixedly installed on one side of the top of the insulation box 1, and a drainage pipe 17 is fixedly installed on one side of the bottom of the insulation box 1. The inner walls of the inner cylinder 21, the middle cylinder 22 and the outer cylinder 23 are all fixedly installed with a lifting plate 4. The lifting plate 4 is used to bring up the alkali slag inside the rotating drum 2 when the rotating drum 2 rotates. A scattering shaft 5 is coaxially arranged inside the inner cylinder 21. The scattering shaft 5 is used to scatter the solid alkali slag inside the inner cylinder 21. A driving mechanism 6 is fixedly installed at one end of the insulation box 1. The driving mechanism 6 is used to drive the rotating drum 2 and the scattering shaft 5 to rotate at different speeds.

[0025] As can be seen from the above, the alkali residue dehydration and drying equipment can directly dehydrate and dry the high-humidity alkali residue that has not been centrifugally separated to remove moisture. When using the equipment, start the hot air blower 3 to allow the air flow to enter the interior of the alkali residue dehydration and drying equipment, preheat the interior of the alkali residue dehydration and drying equipment, and make the hot air pass through the middle cylinder 22, the outer cylinder 23, the discharge bin 12, the circulation pipe 13, the air inlet pipe 14 and the interior of the insulation box 1, and finally be discharged from the exhaust pipe 16, and then start the driving mechanism 6 to make the rotating drum 2 and the scattering shaft 5 start to rotate. When the rotating drum 2 rotates, the lifting plate 4 can lift the solid alkali residue entering the rotating drum 2 to a certain height and disperse it. The scattering shaft 5 rotates relative to the inner cylinder 21 to scatter the solid in the inner cylinder 21. Alkali slag, pour the alkali slag waste liquid into the discharge funnel 11, so that the alkali slag enters the inner cylinder 21, and the rotating drum 2 rotates and moves the alkali slag from one end of the inner cylinder 21 to the other end. When the alkali slag moves in the inner cylinder 21, the excess water on it enters the drainage cavity 24 through the water-permeable sieve hole 25, and flows into the inner bottom of the insulation box 1 from the drainage hole 26. When the alkali slag reaches the other end of the inner cylinder 21, it falls into the middle cylinder 22, and then the alkali slag moves in the middle cylinder 22 in the opposite direction and falls into the outer cylinder 23, and moves inside the outer cylinder 23 toward the discharge bin 12, and finally is discharged from the discharge port 15. At the same time, the hot air blown out by the hot air blower 3 heats the alkali slag after the alkali slag enters the middle cylinder 22, so that the alkali slag gradually appears the effect of dehydration and drying during movement.

[0026] By arranging the rotating drum 2 and the hot air blower 3, the alkali slag put in will continuously move toward the discharge port 15 during the drying process, and will not accumulate in the inner drum 21 near the discharge funnel 11, so that the alkali slag can be continuously put in for drying. At the same time, by arranging the drainage chamber 24 and the water-permeable sieve holes 25, the excess moisture in the alkali slag will be separated from the solid slag in the alkali slag through the water-permeable sieve holes 25, so as to avoid excess moisture in the rotating drum 2, which will lead to untimely evaporation of moisture, so that the drying equipment can complete the dehydration and drying of the alkali slag at one time. By arranging the circulation pipe 13 and the air inlet pipe 14, the water vapor brought out from the inside of the middle drum 22 and the outer drum 23 by the airflow can re-enter the inside of the heat preservation box 1, heat and insulate the outer wall of the outer drum 23, and improve the utilization rate of thermal energy.

[0027] Embodiment 2 like Figure 1 , Figure 2 , Figure 3 and Fig.11As shown, the difference between this embodiment and the above embodiment lies in that the inner cylinder 21 is a structure with two ends open, the middle cylinder 22 and the outer cylinder 23 are structures with one end open and the other end closed, and the opening directions of the two are opposite, there is a gap between the closed end of the middle cylinder 22 and the open end of the outer cylinder 23, the closed end of the outer cylinder 23 is fixedly connected to the outer wall of the inner cylinder 21, the open end of the outer cylinder 23 extends to the outside of one end of the insulation box 1, and the inner wall of the open end of the outer cylinder 23 is provided with a spiral guide plate 210, and the end of the inner cylinder 21 toward the discharge funnel 11 extends to the outside of the other end of the insulation box 1.

[0028] It can be seen from the above that, by setting the structure and connection method of the inner cylinder 21, the middle cylinder 22 and the outer cylinder 23, in the structure of the entire rotating cylinder 2, only the end of the inner cylinder 21 close to the discharge funnel 11 and the end of the outer cylinder 23 close to the discharge bin 12 are connected to the external environment, and the airflow blown into the rotating cylinder 2 by the hot air blower 3 is not easy to dissipate. By setting the spiral guide plate 210, the alkali slag moved to the end of the outer cylinder 23 close to the discharge bin 12 can be output to the discharge bin 12.

[0029] The air outlet pipe of the hot air blower 3 passes through the closed end of the middle cylinder 22 and extends to the interior of the middle cylinder 22. A wind shield 27 is fixedly installed at one end of the inner cylinder 21 facing the hot air blower 3. The diameter of the wind shield 27 is not less than the outer diameter of the inner cylinder 21, and there is a gap between the wind shield 27 and the end of the inner cylinder 21.

[0030] As can be seen from the above, by setting the wind shield 27, the hot air blown out by the hot air blower 3 is blocked by the wind shield 27, and flows along the curvature direction of the wind shield 27 to between the outer wall of the inner tube 21 and the inner wall of the middle tube 22, so that the main airflow generated by the hot air blower 3 will not directly enter the inner tube 21, and a certain negative pressure is formed at the end of the inner tube 21 away from the discharge funnel 11, thereby promoting the air inside the inner tube 21 to flow to the middle tube 22.

[0031] A front support frame 18 and a rear support frame 19 are fixedly installed at both ends of the thermal insulation box 1, a support plate 110 is fixedly installed on the front support frame 18, an oblique support plate 111 is fixedly connected between the outer wall of the discharge funnel 11 and the two ends of the upper surface of the support plate 110, a cross bar 112 is fixedly installed between the outer wall of the discharge bin 12 and the two ends of the rear support frame 19, guide wheels 113 are symmetrically installed on the front support frame 18 and the rear support frame 19, and the ends of the inner cylinder 21 and the outer cylinder 23 extending to the outside of the thermal insulation box 1 are rotatably mounted between the two guide wheels 113 on the same side.

[0032] As can be seen from the above, by arranging the front support frame 18, the rear support frame 19, the support plate 110, the diagonal support plate 111 and the cross bar 112, the feed hopper 11 and the discharge bin 12 are fixedly installed at the two ends of the heat preservation box 1, and by arranging the guide wheel 113, the rotating drum 2 can rotate relative to the heat preservation box 1, so that the alkali slag entering the rotating drum 2 can be continuously brought up and dropped with the rotation of the inner drum 21, the middle drum 22 and the outer drum 23. The inner drum 21, the middle drum 22 and the outer drum 23 mentioned in this embodiment are all straight tapered cylindrical structures with different diameters at both ends, and the inner drum 21, the middle drum 22 and the outer drum 23 are inclined in different directions. Specifically, the inner drum 21 is inclined toward one end of the feed hopper 11. The inner diameter of the middle cylinder 22 is smaller than the inner diameter of the other end, the inner diameter of the middle cylinder 22 facing the discharge funnel 11 is larger than the inner diameter of the other end, the inner diameter of the outer cylinder 23 facing the discharge funnel 11 is smaller than the inner diameter of the other end, and the axes of the inner cylinder 21, the middle cylinder 22 and the outer cylinder 23 coincide with each other and are parallel to the lower surface of the insulated box 1. Therefore, when the alkali residue enters the inner cylinder 21 from the discharge funnel 11, it will move away from the discharge funnel 11 as the inner cylinder 21 rotates. The alkali residue falling into the middle cylinder 22 will move toward the discharge funnel 11, and the alkali residue falling into the outer cylinder 23 will move away from the discharge funnel 11. Therefore, after the alkali residue falls into the inside of the rotating drum 2, it will move along the drying path when the rotating drum 2 rotates.

[0033] Embodiment 3 like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the difference between this embodiment and the above embodiment lies in that an annular baffle 28 is fixedly installed at one end of the inner cylinder 21 extending to the outside of the thermal insulation box 1, the inner diameter of the annular baffle 28 is smaller than the inner diameter of the inner cylinder 21, and the discharge end of the discharge funnel 11 passes through the annular baffle 28 and extends to the interior of the inner cylinder 21, and a fixing ring 29 is fixedly installed on the annular baffle 28.

[0034] As can be seen from the above, by providing the annular baffle 28 , on the one hand, the alkali residue input into the inner cylinder 21 by the discharge funnel 11 can be prevented from flowing out from the end of the inner cylinder 21 close to the discharge funnel 11 , and on the other hand, support is provided for the installation of the fixing ring 29 .

[0035] The driving mechanism 6 includes a motor 61, a transmission shaft 62, a transmission swivel seat 63 and a transmission pulley 64. The motor 61 is fixedly mounted on the front support frame 18, the transmission shaft 62 is rotatably mounted on the transmission swivel seat 63, the transmission swivel seat 63 is fixedly mounted on the support plate 110, and the driving shaft of the motor 61 and the transmission shaft 62 are connected through the transmission pulley 64. A transmission gear 65 is also fixedly mounted on the transmission shaft 62, and the outer side surface of the fixing ring 29 is provided with outer gear teeth 66 meshing with the transmission gear 65.

[0036] As can be seen from the above, the transmission gear 65 meshes with the outer gear teeth 66 provided on the outer side of the fixing ring 29, so the transmission shaft 62 can drive the rotating drum 2 to rotate. Therefore, the motor 61 connected to the transmission shaft 62 through the transmission pulley 64 can drive the rotating drum 2 to rotate.

[0037] The driving mechanism 6 also includes an intermediate shaft 67 and an intermediate swivel seat 68. The intermediate shaft 67 is rotatably mounted on the intermediate swivel seat 68, and the intermediate swivel seat 68 is fixedly mounted on the support plate 110. A driven gear 69 and an intermediate gear 610 are fixedly mounted on the breaking shaft 5 and the intermediate shaft 67, respectively. The driven gear 69 and the intermediate gear 610 are meshingly connected. The inner side surface of the fixing ring 29 is provided with an inner gear tooth 611 meshingly connected with the intermediate gear 610.

[0038] As can be seen from the above, since the driven gear 69 and the intermediate gear 610 are meshingly connected, and the intermediate gear 610 is meshingly connected with the inner gear teeth 611 arranged on the inner side surface of the fixed ring 29, the driven gear 69 is transmission-connected with the inner gear teeth 611. Therefore, the breaking up shaft 5 and the rotating drum 2 are transmission-connected, and by setting the transmission ratio among the inner gear teeth 611, the driven gear 69 and the intermediate gear 610, the rotation speeds of the breaking up shaft 5 and the rotating drum 2 can be different, and the breaking up shaft 5 and the rotating drum 2 can rotate relative to each other.

[0039] Embodiment 4 like Figure 1 , Figure 6 and Figure 8 As shown, the difference between this embodiment and the above embodiment is that one end of the breaking up shaft 5 is rotatably connected to the support plate 110, and the other end of the breaking up shaft 5 is rotatably connected to the wind shield plate 27, and one end of the breaking up shaft 5 is fixedly installed with an impact plate 51 distributed in a rectangular array, and the impact plate 51 is opposite to the lifting plate 4.

[0040] As can be seen from the above, by providing the impact plate 51, the alkali slag lifted by the lifting plate 4 collides with the impact plate 51 when falling, which can play a role in breaking up the solid slag, thereby increasing the contact area between the subsequent solid slag and the hot air and promoting drying.

[0041] A breaking rod 52 is also fixedly mounted on the breaking shaft 5. The breaking rod 52 includes a straight rod 521 and an arc plate 522. The arc radius of the arc plate 522 is smaller than the radius of the inner cylinder 21, and the end of the arc plate 522 away from the breaking shaft 5 is close to the inner wall of the inner cylinder 21.

[0042] As can be seen from the above, by providing a breaking rod 52 including a straight rod 521 and a curved plate 522, when the breaking shaft 5 rotates, since the end of the curved plate 522 away from the breaking shaft 5 is close to the inner wall of the inner cylinder 21, the rotation of the curved plate 522 can squeeze the larger solid slag in the inner cylinder 21, so that the solid slag is crushed.

[0043] Embodiment 5 See also Figure 1 - Fig.11 The present invention also discloses a method for dehydrating and drying alkali residue, the specific steps of which are: Start the hot air blower 3, so that the airflow enters the inside of the alkali residue dehydration and drying equipment, preheats the inside of the alkali residue dehydration and drying equipment, and makes the hot air pass through the middle cylinder 22, the outer cylinder 23, the discharge bin 12, the circulation pipe 13, the air inlet pipe 14 and the inside of the heat preservation box 1, and finally discharged from the exhaust pipe 16; The driving mechanism 6 is started, so that the drum 2 and the breaking shaft 5 start to rotate. When the drum 2 rotates, the lifting plate 4 can lift the solid alkali residue entering the drum 2 to a certain height and make it disperse and fall. The breaking shaft 5 rotates relative to the inner drum 21 to break up the solid alkali residue in the inner drum 21. The alkali residue waste liquid is poured into the discharge funnel 11, so that the alkali residue enters the inner cylinder 21, and the rotating cylinder 2 rotates and moves the alkali residue from one end of the inner cylinder 21 to the other end. When the alkali residue moves in the inner cylinder 21, the excess water on it enters the drainage cavity 24 through the water-permeable sieve hole 25, and flows into the inner bottom of the insulation box 1 from the drainage hole 26; When the alkali residue reaches the other end of the inner cylinder 21, it falls into the middle cylinder 22, and then moves in the middle cylinder 22 in the opposite direction to fall into the outer cylinder 23, and moves inside the outer cylinder 23 toward the discharge bin 12, and is finally discharged from the discharge port 15. At the same time, the hot air blown out by the hot air blower 3 heats the alkali residue after the alkali residue enters the middle cylinder 22, so that the alkali residue gradually appears the effect of dehydration and drying during the movement.

[0044] Although 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. An alkali residue dehydration and drying device, comprising an insulation box and a rotating drum, wherein the rotating drum is rotatably installed inside the insulation box, characterized in that: The rotating drum comprises an inner drum, a middle drum and an outer drum which are fixedly connected in sequence from the inside to the outside, a feeding funnel and a discharging bin are respectively installed at both ends of the heat preservation box, the discharging end of the feeding funnel is inserted into the interior of one end of the inner drum, the discharging bin is sleeved on the outside of one end of the outer drum, the end of the inner drum away from the feeding funnel is connected with the interior of the middle drum, the end of the outer drum away from the discharging bin is connected with the interior of the middle drum, a discharging port is arranged at the lower end of the discharging bin, a drainage cavity is arranged on the outer surface of the inner drum, the drainage cavity is connected with the inner wall of the inner drum through a water-permeable sieve hole, and a drainage hole which is connected with the interior of the heat preservation box is opened at one end of the drainage cavity, a hot air blower is fixedly installed at one end of the discharging bin, and the outlet of the hot air blower An air duct runs through the interior of the middle cylinder, a circulation pipe is fixedly connected to the upper end of the discharge bin, an air intake pipe connected to the interior of the circulation pipe is fixedly installed on the circulation pipe, the air intake pipe is connected to the inner top of the insulation box, an exhaust pipe is fixedly installed on one side of the top of the insulation box, and a drain pipe is fixedly installed on one side of the bottom of the insulation box, the inner walls of the inner cylinder, the middle cylinder and the outer cylinder are all fixedly installed with lifting plates, the lifting plates are used to bring up the alkali slag inside when the rotating drum rotates, a breaking shaft is coaxially arranged inside the inner cylinder, the breaking shaft is used to break up the solid alkali slag inside the inner cylinder, and a driving mechanism is fixedly installed on one end of the insulation box, the driving mechanism is used to drive the rotating drum and the breaking shaft to rotate at different speeds.

2. The alkaline residue dehydration and drying equipment according to claim 1 is characterized in that: The inner cylinder is a structure with two ends open, and the middle cylinder and outer cylinder are structures with one end open and the other end closed, and the opening directions of the two are opposite. There is a gap between the closed end of the middle cylinder and the open end of the outer cylinder, and the closed end of the outer cylinder is fixedly connected to the outer wall of the inner cylinder. The open end of the outer cylinder extends to the outside of one end of the insulation box, and the inner wall of the open end of the outer cylinder is provided with a spiral guide plate, and the end of the inner cylinder facing the discharge funnel extends to the outside of the other end of the insulation box.

3. The alkaline residue dehydration and drying equipment according to claim 2 is characterized in that: The air outlet pipe of the hot air blower passes through the closed end of the middle cylinder and extends to the interior of the middle cylinder. A wind shield is fixedly installed at one end of the inner cylinder facing the hot air blower. The diameter of the wind shield is not less than the outer diameter of the inner cylinder, and there is a gap between the wind shield and the end of the inner cylinder.

4. The alkaline residue dehydration and drying equipment according to claim 2 is characterized in that: A front support frame and a rear support frame are fixedly installed at both ends of the insulation box, a support plate is fixedly installed on the front support frame, an oblique support plate is fixedly connected between the outer wall of the discharge funnel and the two ends of the upper surface of the support plate, a cross bar is fixedly installed between the outer wall of the discharge bin and the two ends of the rear support frame, guide wheels are symmetrically installed on the front support frame and the rear support frame, and the ends of the inner cylinder and the outer cylinder extending to the outside of the insulation box are rotatably mounted between the two guide wheels on the same side.

5. The alkaline residue dehydration and drying equipment according to claim 4 is characterized in that: An annular baffle is fixedly mounted on one end of the inner tube extending to the outside of the heat preservation box, the inner diameter of the annular baffle is smaller than the inner diameter of the inner tube, the discharge end of the discharge funnel passes through the annular baffle and extends to the interior of the inner tube, and a fixing ring is fixedly mounted on the annular baffle.

6. The alkaline residue dehydration and drying equipment according to claim 5, characterized in that: The driving mechanism includes a motor, a transmission shaft, a transmission swivel and a transmission pulley. The motor is fixedly mounted on the front support frame, the transmission shaft is rotatably mounted on the transmission swivel, the transmission swivel is fixedly mounted on the support plate, the driving shaft of the motor and the transmission shaft are connected via a transmission pulley, a transmission gear is also fixedly mounted on the transmission shaft, and the outer side surface of the fixing ring is provided with outer gear teeth meshing with the transmission gear.

7. The alkaline residue dehydration and drying equipment according to claim 5, characterized in that: The driving mechanism also includes an intermediate shaft and an intermediate swivel seat. The intermediate shaft is rotatably mounted on the intermediate swivel seat. The intermediate swivel seat is fixedly mounted on a support plate. A driven gear and an intermediate gear are fixedly mounted on the breaking up shaft and the intermediate shaft respectively. The driven gear and the intermediate gear are meshingly connected. The inner side surface of the fixing ring is provided with internal gear teeth meshingly connected to the intermediate gear.

8. The alkaline residue dehydration and drying equipment according to claim 3 is characterized in that: One end of the scattering shaft is rotatably connected to the support plate, and the other end of the scattering shaft is rotatably connected to the windshield plate, and one end of the scattering shaft is fixedly installed with impact plates distributed in a rectangular array, and the impact plates are opposite to the lifting plates.

9. The alkaline residue dehydration and drying equipment according to claim 8, characterized in that: A breaking rod is also fixedly mounted on the breaking shaft. The breaking rod comprises a straight rod and an arc plate. The arc radius of the arc plate is smaller than the radius of the inner cylinder, and one end of the arc plate away from the breaking shaft is close to the inner wall of the inner cylinder.

10. A method for dehydrating and drying alkali residue, using the alkali residue dehydrating and drying equipment according to any one of claims 1 to 9, characterized in that: The specific steps are: Start the hot air blower to allow the air flow to enter the interior of the alkali residue dehydration and drying equipment, preheat the interior of the alkali residue dehydration and drying equipment, and allow the hot air to pass through the middle cylinder, outer cylinder, discharge bin, circulation pipe, air inlet pipe and insulation box, and finally be discharged from the exhaust pipe; The driving mechanism is started, so that the drum and the breaking shaft start to rotate. When the drum rotates, the lifting plate can lift the solid alkali residue entering the drum to a certain height and make it fall apart. The breaking shaft rotates relative to the inner drum to break up the solid alkali residue in the inner drum. Pour the alkali residue waste liquid into the discharge funnel, so that the alkali residue enters the inner drum. The rotating drum moves the alkali residue from one end of the inner drum to the other end. When the alkali residue moves in the inner drum, the excess water on it enters the drainage cavity through the permeable sieve holes and flows into the inner bottom of the insulation box from the drainage hole. When the alkali residue reaches the other end of the inner cylinder, it falls into the middle cylinder. Then, it moves in the opposite direction in the middle cylinder and falls into the outer cylinder. It moves toward the discharge bin inside the outer cylinder and is finally discharged from the discharge port. At the same time, the hot air blown out by the hot air blower heats the alkali residue after it enters the middle cylinder, so that the alkali residue gradually shows the effect of dehydration and drying during movement.

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