Mixing device for production of hydroxy iron series desulfurization catalyst

Abstract

The invention relates to a mixing device for producing a hydroxyl iron series desulfurization catalyst, and belongs to the technical field of hydroxyl iron series desulfurization catalyst production equipment. The device comprises a reaction container, a solution stirring assembly, a precipitation stirring assembly, a crushing sieve assembly, a lifting assembly and an oxygen supply assembly are arranged in the reaction container, the precipitation stirring assembly is used for stirring precipitation and comprises stirring blades, and the crushing sieve assembly comprises a pressing plate and at least two sieve plates; the sieve plate is installed in the reaction container in an up-down elastic sliding mode, the lifting assembly comprises an external spiral auger, the crushing sieve assembly is sleeved with the external spiral auger, the top end of the external spiral auger extends to the position above the sieve plate located at the top, the bottom end of the external spiral auger extends to the bottom of the reaction container, and the oxygen supply assembly comprises an exhaust hole used for exhausting oxygen. And the exhaust holes are positioned below the bottommost sieve plate. The device can refine precipitates, and is beneficial to improving the oxidation reaction rate.

Description

Technical Field

[0001] The invention relates to the technical field of hydroxy-iron desulfurization catalyst production equipment, in particular to a mixing device for producing hydroxy-iron desulfurization catalyst. Background Art

[0002] Hydroxy-iron desulfurization catalyst is a highly efficient catalyst for removing sulfides from gas or liquid, and is used in the fields of petrochemicals, natural gas purification, coal chemical industry, etc. High sulfur capacity hydroxy iron oxide desulfurizer is regarded as a type of hydroxy iron desulfurization catalyst. This type of desulfurizer not only has the basic functions and structural characteristics of hydroxy iron desulfurization catalyst, but also significantly improves its absorption capacity for sulfides through specific design and preparation process.

[0003] The preparation process of high-sulfur capacity ferric hydroxide desulfurizer usually uses ferrous sulfate and ferrous chloride solution as iron sources, adds ammonium carbonate solution and calcium hydroxide as precipitants, and adds polyethylene glycol 200 and EDTA2 sodium as dispersants. The comprehensive reaction generates ferrous hydroxide precipitate, and then air is blown into the aeration part of the mixing device to oxidize the generated ferrous hydroxide precipitate to obtain a solid precipitate containing ferric hydroxide. Then, excess water is filtered out, and the precipitate is dried to obtain a desulfurizer precursor. The precursor is then sent to an extruder for extrusion molding to obtain a strip desulfurizer, and the strip desulfurizer is low-temperature dried to finally obtain a high-sulfur capacity ferric hydroxide desulfurizer.

[0004] In the actual production process, a stirring device is usually used to stir the solutions participating in the reaction, so that different solutions can be mixed more evenly and the reaction efficiency can be improved. For example, a chemical reaction stirring device disclosed in the patent with authorization announcement number CN203777994U increases the chemical reaction rate by stirring.

[0005] However, for the production process of hydroxy-iron desulfurization catalyst, although the efficiency of generating ferrous hydroxide precipitate can be improved by stirring the solution in the early stage of the reaction, the generated ferrous hydroxide precipitate will gather together in the later stage of the reaction, and the gathered ferrous hydroxide precipitate is difficult to fully react with oxygen, and the efficiency of generating ferric hydroxide is low. At the same time, the oxygen introduced into the reaction solution usually floats to the surface of the solution quickly, while the ferrous hydroxide precipitate usually gathers at the bottom of the reaction vessel under the action of gravity, which makes it difficult for the ferrous hydroxide precipitate in the solution to fully contact with oxygen, and the oxidation reaction is difficult to fully proceed, and the overall production efficiency is still low. Summary of the invention

[0006] The invention provides a mixing device for producing a hydroxy-iron desulfurization catalyst, so as to solve the technical problems in the prior art that the oxidation reaction of ferrous hydroxide is difficult to fully proceed and the reaction efficiency is low during the production of the hydroxy-iron desulfurization catalyst.

[0007] In order to solve the above problems, the present invention provides a mixing device for producing a hydroxy iron-based desulfurization catalyst, which adopts the following technical solution: A mixing device for producing a hydroxy iron-based desulfurization catalyst comprises a reaction container, a solution stirring assembly is arranged in the reaction container, a precipitation stirring assembly, a crushing screen assembly, a lifting assembly and an oxygen supply assembly are also arranged in the reaction container, and the precipitation stirring assembly comprises a stirring blade located at the bottom of the reaction container; The crushing screen assembly includes a pressing plate that can move up and down and at least two sieve plates located below the pressing plate and arranged in sequence up and down, and each sieve plate is elastically slidably installed inside the reaction container up and down; the lifting assembly includes an external spiral auger, and the external spiral auger sleeve is arranged on the outside of the crushing screen assembly, and the top end of the external spiral auger extends to the top of the sieve plate located at the top, and the bottom end extends to the bottom of the reaction container; the oxygen supply assembly includes an exhaust hole for outputting oxygen, and the exhaust hole is located below the bottom sieve plate; When the stirring blade rotates, it can drive the sediment deposited at the bottom of the reaction container to move toward the bottom of the external spiral auger under the action of centrifugation. When the external spiral auger rotates, it can lift the sediment to above the sieve plate at the top. The pressure plate can move downward to push the sieve plates closer to each other, and squeeze the sediment on the sieve plates to pass through the sieve plates and fall to under the sieve plate at the bottom. The exhaust hole can discharge oxygen toward the sediment that falls under the sieve plate at the bottom.

[0008] By adopting the above technical scheme, the sediment falling on the bottom of the reaction container can be stirred by the stirring blades and moved to the bottom of the external spiral auger located near the side wall of the reaction container under the action of centrifugation. The external spiral auger lifts the sediment upward, and finally falls on the sieve plate located at the top, and is graded through each sieve plate. When the pressing plate moves downward, it can squeeze the sediment and make the sieve plates approach each other. The sediment is crushed after passing through each sieve plate and finally falls under the sieve plate located at the bottom, which is equivalent to crushing and refining the sediment. Subsequently, oxygen is introduced from the exhaust hole to the bottom of the bottom sieve plate. Oxygen can react more fully with the refined sediment, so that the ferrous hydroxide precipitation is oxidized into a precipitate containing ferric hydroxide, which is beneficial to improving the oxidation reaction efficiency of the sediment.

[0009] Furthermore, the solution stirring assembly includes a vertical cylinder and a pipetting auger. The vertical cylinder is arranged inside the reaction container, and the pipetting auger is installed in the inner cavity of the vertical cylinder. The bottom of the vertical cylinder is provided with a filter hole, and the top is provided with a drainage outlet. The pipetting auger can rotate in the vertical cylinder to drive the solution in the reaction container into the vertical cylinder through the filter hole, and make the solution in the vertical cylinder move toward the drainage outlet and be discharged into the inner cavity of the reaction container.

[0010] By adopting the above technical solution, the solution is stirred by making it flow through the arrangement of the vertical cylinder and the pipetting auger. The stirring method is novel, the stirring structure occupies less space, and it is easier to design the position distribution of the structure inside the reaction container.

[0011] Furthermore, the sedimentation stirring assembly includes a plurality of stirring blades connected to the bottom of the vertical cylinder, the cross-section of the stirring blades is a V-shape with the opening facing downward, the stirring blades include a vertical plate and a push inclined plate connected to the top of the vertical plate, and the vertical cylinder can rotate around the vertical center axis to drive the stirring blades to rotate and stir the sediment deposited at the bottom of the reaction container.

[0012] With the above technical solution, when the stirring blade rotates along the direction in which the vertical plate is located in front of the top push inclined plate, the vertical plate can push the sediment deposited at the bottom of the reaction container to rotate, so that the sediment moves toward the external spiral auger under the action of centrifugal force, making it easier for the external spiral auger to lift the sediment upward. When the stirring blade rotates along the direction in which the top push inclined plate is located in front of the vertical plate, the top push inclined plate can push the sediment upward.

[0013] Furthermore, the crushing screen assembly includes a first screen plate, a second screen plate and a bottom screen plate which are arranged in sequence from top to bottom, a third elastic member is connected between the bottom screen plate and the vertical cylinder, a second elastic member is connected between the second screen plate and the bottom screen plate, a first elastic member is connected between the first screen plate and the second screen plate, a first sleeve is provided on the upper and lower movable sleeves on the outer side of the first screen plate, the first sleeve and the first screen plate are prevented from falling off up and down, a second sleeve is provided on the upper and lower movable sleeves on the outer side of the second screen plate, the second sleeve and the second screen plate are prevented from falling off up and down, and the outer diameter of the first sleeve is smaller than the inner diameter of the second sleeve.

[0014] By adopting the above technical solution, the upper and lower elastic sliding installation of each sieve plate is realized by the first elastic member, the second elastic member and the third elastic member. By arranging the first sleeve and the second sleeve, the sediment above the sieve plate is blocked in the circumferential direction to prevent the sediment from being squeezed out from between the peripheries of the two adjacent sieve plates above and below.

[0015] Furthermore, the oxygen supply assembly also includes a shield and an air inlet pipe. The shield can be slid up and down and is mounted on the outside of the vertical cylinder. The air inlet pipe is connected to the inner cavity of the shield. The shield can be moved to cover the discharge outlet so that the air inlet pipe is connected to the inner cavity of the vertical cylinder through the shield. The V-shaped inner cavity of the stirring blade is connected to the filter hole at the bottom of the vertical cylinder, and the exhaust hole is opened at the top of the stirring blade.

[0016] By adopting the above technical solution, gas is introduced into the inner cavity of the shield through the air inlet pipe, and the gas enters the inner cavity of the vertical tube along the liquid discharge outlet, and then is discharged from the filter hole at the bottom of the inner cavity of the vertical tube to the V-shaped inner cavity of the stirring blade, and then discharged from the exhaust hole on the stirring blade, thus realizing the gas injection process. The vertical tube has two uses, which can be used as a tool for stirring the solution and as a tool for conveying gas, which simplifies the design and saves costs.

[0017] Furthermore, a top elastic member is connected between the shield and the top inner wall of the reaction vessel. The shield is located above the pressure plate and is stopped by the pressure plate at the top and bottom. The shield is pushed above the discharge outlet by the pressure plate during the stirring reaction, and is separated from the pressure plate during the oxidation reaction and is pushed downward by the top elastic member to cover the discharge outlet.

[0018] By adopting the above technical solution, the shield can be switched between two states by setting the top elastic member, without having to separately set a driving structure for driving the shield to move up and down to a set position, which can save power costs and simplify the structure.

[0019] Furthermore, an external spiral auger can be installed inside the reaction vessel so as to be movable up and down. A lifting cylinder is provided at the bottom of the reaction vessel. A driving output end of the lifting cylinder is connected to a ring block. The ring block is supported at the bottom of the external spiral auger. The lifting cylinder can drive the ring block to move upward, thereby sealing the ring block between the reaction vessel and the bottom sieve plate to form a closed space below the bottom sieve plate.

[0020] By adopting the above technical solution, the crushed and refined ferrous hydroxide precipitate is concentrated in a closed space, and the ferrous hydroxide precipitate will not escape everywhere. In this way, during the subsequent process of introducing oxygen, the ferrous hydroxide precipitate can react with oxygen more fully, thereby accelerating the reaction rate.

[0021] Furthermore, the lifting assembly also includes a lifting drive assembly, which includes a lifting motor, a transmission gear and a transmission ring gear. The transmission ring gear is coaxial with the external spiral auger and is connected to the top of the external spiral auger. The lifting motor is connected to the transmission gear to drive the transmission gear to rotate. The transmission gear is meshed with the transmission ring gear to drive the transmission ring gear to rotate, thereby driving the external spiral auger to rotate.

[0022] By adopting the above technical solution, the transmission structure is simple and easy to arrange.

[0023] The beneficial effect of a mixing device for producing a hydroxy iron-based desulfurization catalyst provided by the present invention is that a precipitation stirring component stirs the ferrous hydroxide precipitate deposited at the bottom of a reaction container, so that the ferrous hydroxide precipitate moves to the bottom of an external spiral auger under the action of a centrifuge, the external spiral auger lifts the ferrous hydroxide precipitate to above the uppermost sieve plate, a plurality of sieve plates classify the precipitate, and when the pressing plate moves downward, the precipitate is squeezed so that the precipitate passes through the sieve holes on the sieve plate and falls below the lowermost sieve plate, thereby achieving crushing and refining of the precipitate, the crushed ferrous hydroxide precipitate gathers at the bottom of the reaction container, and oxygen is introduced through the exhaust hole at this time, and the oxygen fully reacts with the refined ferrous hydroxide precipitate, thereby accelerating the oxidation reaction rate and making the oxidation reaction of the ferrous hydroxide precipitate more fully proceed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein: Figure 1 A schematic diagram of the external structure of a mixing device for producing a hydroxy iron-based desulfurization catalyst provided by the present invention; Figure 2 A three-dimensional cross-sectional view of a mixing device for producing a hydroxy iron-based desulfurization catalyst provided by the present invention; Figure 3 A schematic diagram of the internal structure of a mixing device for producing a hydroxy iron-based desulfurization catalyst provided by the present invention; Figure 4 A three-dimensional cross-sectional view of the internal structure of a mixing device for producing a hydroxy iron-based desulfurization catalyst provided by the present invention; Figure 5 for Figure 4 A schematic diagram of the structure enlargement at the center A; Figure 6 The present invention provides a schematic diagram of the state structure of a mixing device for producing a hydroxy iron-based desulfurization catalyst during an oxidation process.

[0025] Description of reference numerals: 1. Reaction container; 2. Rack; 3. Top cover; 4. Lifting cylinder; 5. Stirring drive motor 2; 6. Air inlet pipe; 7. Lifting cylinder; 8. Stirring drive motor 1; 9. Lifting motor; 10. Transmission gear ring; 11. Pressing plate; 12. External spiral auger; 13. First sieve plate; 14. Second sieve plate; 15. Bottom sieve plate; 16. Stirring blade; 161. Vertical plate; 162. Pushing inclined plate; 163. Exhaust hole; 17. Vertical cylinder; 171. Filter hole; 18. Transfer screw Dragon; 19. Shield; 20. Transmission gear; 21. Top elastic member; 22. First sleeve; 23. Second sleeve; 24. Annular support plate; 25. Third elastic member; 26. Second elastic member; 27. First elastic member; 28. Second connecting sleeve; 29. ​​Second connecting ring plate; 30. First connecting sleeve; 31. First connecting ring plate; 32. Annular block; 33. Connecting column; 34. Transition connecting sleeve; 35. Top support ring; 36. Transmission shaft; 37. Support frame. DETAILED DESCRIPTION

[0026] 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. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0027] The following is one embodiment of a mixing device for producing a hydroxy iron-based desulfurization catalyst provided by the present invention.

[0028] like Figure 1-Figure 6 As shown, a mixing device for producing hydroxy-iron-based desulfurization catalyst includes a frame 2, a reaction container 1, a solution stirring component, a precipitation stirring component, a crushing screen component, a lifting component, an oxygen supply component and a lifting component.

[0029] like Figure 1 As shown, the rack 2 is arranged on a horizontal ground, the reaction container 1 is cylindrical and fixedly mounted on the rack 2 , and a top cover 3 is provided on the top of the reaction container 1 .

[0030] like Figure 2-Figure 5 As shown, the solution stirring assembly includes a vertical cylinder 17, a pipetting auger 18 and a stirring drive motor 8.

[0031] The vertical cylinder 17 is coaxial with the reaction container 1 and is rotatably installed inside the reaction container 1 around a vertically extending rotation axis. The bottom end of the vertical cylinder 17 is closed, and a liquid discharge outlet is provided at the top. The bottom side wall of the vertical cylinder 17 is densely covered with filter holes 171, and the solution can enter the vertical cylinder 17 through the filter holes 171.

[0032] The pipetting auger 18 is coaxially arranged inside the vertical cylinder 17 and rotatably mounted on the reaction container 1. When the pipetting auger 18 rotates counterclockwise, the solution in the reaction container 1 can flow into the vertical cylinder 17 through the filter hole 171, and push the solution in the vertical cylinder 17 to flow upward. The flowing liquid flows into the reaction container 1 through the discharge outlet, so that the solution in the reaction container 1 continuously flows, thereby achieving stirring of the solution.

[0033] The stirring drive motor 8 is installed at the bottom of the reaction container 1, and the output shaft of the stirring drive motor 8 is connected to the liquid transfer auger 18 to drive the liquid transfer auger 18 to rotate.

[0034] like Figure 2-Figure 5 As shown, the sedimentation stirring assembly includes a stirring drive motor 5 and five stirring blades 16.

[0035] The stirring drive motor 25 is installed on the top cover 3, and the output shaft end of the stirring drive motor 25 is transmission-connected with a connecting column 33. The connecting column 33 is connected to the top of the vertical cylinder 17 and is coaxial with the vertical cylinder 17. When the stirring drive motor 25 drives the connecting column 33 to rotate, it can drive the vertical cylinder 17 to rotate synchronously.

[0036] The five stirring blades 16 are connected to the outer wall of the bottom of the vertical cylinder 17. The five stirring blades 16 extend radially along the vertical cylinder 17 and are evenly distributed in the circumferential direction of the vertical cylinder 17. The cross section of the stirring blade 16 is V-shaped with the opening facing downward. Figure 4 As shown, the stirring blade 16 includes a vertical plate 161 and a push inclined plate 162 inclinedly connected to the top of the vertical plate 161, and a row of exhaust holes 163 are provided on the top of the push inclined plate 162. The space between the vertical plate 161 and the push inclined plate 162 in each stirring blade 16 is connected to part of the filter holes 171 on the vertical cylinder 17.

[0037] The stirring drive motor 25 drives the stirring blade 16 to rotate by driving the vertical cylinder 17. In the clockwise direction, the vertical plate 161 is located in front of the push inclined plate 162. When the stirring blade 16 is driven to rotate clockwise, the sediment at the bottom of the reaction vessel 1 is pushed to rotate through the vertical plate 161, and the sediment moves toward the edge of the inner cavity of the reaction vessel 1 under the centrifugal effect. When the stirring blade 16 is driven to rotate counterclockwise, the sediment at the bottom of the reaction vessel 1 is driven to rotate through the push inclined plate 162, and at the same time, the push inclined plate 162 pushes the sediment upward, so that the sediment moves to the top of the exhaust hole 163.

[0038] like Figure 2-Figure 5 As shown, the crushing screen assembly includes a pressing plate 11, a lifting drive member, a first screen cylinder, a second screen cylinder and a bottom screen plate 15.

[0039] The pressing plate 11 is an annular plate, and is coaxially arranged on the outside of the connecting column 33 and the vertical cylinder 17 .

[0040] The lifting drive member adopts a lifting cylinder 4, which is fixedly mounted on the top cover 3, and a driving output end of the lifting cylinder 4 is connected to the pressing plate 11 to drive the pressing plate 11 to move up and down.

[0041] The first screen cylinder and the second screen cylinder are arranged in sequence from top to bottom, and the first screen cylinder includes a first sleeve 22 and a first screen plate 13. The first sleeve 22 is coaxially sleeved on the outside of the vertical cylinder 17 and a gap is provided between the first sleeve 22 and the vertical cylinder 17, and a first top step is provided at the top of the inner circle of the first sleeve 22, and a first bottom step is provided at the bottom of the inner circle of the first sleeve 22.

[0042] like Figure 5 As shown, the first screen plate 13 is slidably sleeved on the outside of the vertical cylinder 17 and is located on the top of the first sleeve 22. The outer ring of the first screen plate 13 is provided with a first annular protrusion, and the first top step is built on the first annular protrusion. The first top step and the first bottom step on the first sleeve 22 and the first annular protrusion on the first screen plate 13 are stopped up and down, so as to realize the anti-slipping between the first sleeve 22 and the first screen plate 13 in the up and down direction.

[0043] like Figure 5 As shown, the top of the inner ring of the first sieve plate 13 is connected to the first connecting sleeve 30, and the top of the first connecting sleeve 30 is connected to the first connecting ring plate 31, which is slidably sleeved on the outside of the vertical cylinder 17. The top of the first connecting ring plate 31 is connected to the transition sleeve 34, and the side wall of the transition sleeve 34 is provided with a plurality of vertically extending strip-shaped through holes, which correspond to the drainage outlets. The top of the transition sleeve 34 is connected to the top support ring 35, and the above-mentioned pressure plate 11 is sleeved on the outside of the transition sleeve 34, and the top support ring 35 is located above the pressure plate 11.

[0044] The second screen cylinder includes a second sleeve 23 and a second screen plate 14. The second sleeve 23 is coaxial with the first sleeve 22 and is located below the first sleeve 22. The inner diameter of the second sleeve 23 is larger than the outer diameter of the first sleeve 22. The top of the inner circle of the second sleeve 23 is provided with a second top step, and the bottom of the inner circle of the second sleeve 23 is provided with a second bottom step.

[0045] The second sieve plate 14 is slidably sleeved on the outside of the vertical cylinder 17 and is located at the top of the inner circle of the second sleeve 23. The mesh size of the second sieve plate 14 is smaller than the mesh size of the first sieve plate 13. The outer circle of the second sieve plate 14 is provided with a second annular protrusion, and the second top step is built on the second annular protrusion. The second top step and the second bottom step on the second sleeve 23 and the second annular protrusion on the second sieve plate 14 are stopped up and down, so as to realize the anti-slipping between the second sleeve 23 and the second sieve plate 14 in the up and down direction.

[0046] like Figure 5 As shown, the top of the inner circle of the second sieve plate 14 is connected to a second connecting sleeve 28 , the top of the second connecting sleeve 28 is connected to a second connecting ring plate 29 , and the second connecting ring plate 29 is slidably sleeved on the outer side of the vertical cylinder 17 up and down.

[0047] A first elastic member 27 is connected between the second connecting ring plate 29 and the first connecting ring plate 31 . The first elastic member 27 is sleeved on the outer side of the vertical tube 17 .

[0048] The bottom sieve plate 15 is located below the second sleeve 23 . The bottom sieve plate 15 abuts against the second bottom step from bottom to top. The mesh size of the bottom sieve plate 15 is smaller than the mesh size of the second sieve plate 14 .

[0049] A second elastic member 26 is connected between the bottom sieve plate 15 and the second connecting ring plate 29 . The second elastic member 26 is sleeved on the outer side of the vertical cylinder 17 .

[0050] An annular support plate 24 is fixedly sleeved on the outer side of the bottom of the vertical cylinder 17. The annular support plate 24 is located above the area where the filter holes 171 are provided in the vertical cylinder 17. A third elastic member 25 is connected between the bottom sieve plate 15 and the annular support plate 24. The third elastic member 25 is sleeved on the outer side of the vertical cylinder 17.

[0051] The lifting assembly includes a lifting drive assembly and an external spiral auger 12, and the lifting drive assembly includes a lifting motor 9, a transmission gear 20 and a transmission gear ring 10. The lifting motor 9 is installed on the top cover 3, and the output shaft end of the lifting motor 9 is connected to a vertically extending transmission shaft 36. The transmission gear 20 is sleeved at the bottom end of the transmission shaft 36 and can slide up and down along the transmission shaft 36. A support frame 37 is provided on the outside of the transmission gear 20, and the support frame 37 cooperates with the transmission gear 20 to prevent it from falling off up and down. The transmission gear ring 10 is installed on the support frame 37 and cooperates with the support frame 37 to prevent it from falling off up and down. The inner side of the transmission gear ring 10 is provided with meshing teeth, and the transmission gear 20 is located on the inner side of the transmission gear ring 10 and meshes with the transmission gear ring 10.

[0052] The external spiral auger 12 is coaxially arranged on the outside of the first sieve cylinder and the second sieve cylinder, and is adapted to be arranged in the interval between the first sieve cylinder, the second sieve cylinder and the reaction container 1. The top end of the external spiral auger 12 is fixedly connected to the transmission ring gear 10 and can be driven to rotate by the transmission ring gear 10.

[0053] The oxygen supply assembly includes a shield 19 and an air inlet pipe 6. The shield 19 is coaxially sleeved on the outside of the connecting column 33 and can slide up and down along the connecting column 33 and the vertical cylinder 17. A gap is provided between the shield 19 and the outer wall of the vertical cylinder 17. The air inlet pipe 6 is connected to the shield 19, and the air inlet pipe 6 is connected to the inner cavity of the shield 19. A top elastic member 21 is connected between the shield 19 and the top cover 3. The top elastic member 21 is a compression spring sleeved on the outside of the connecting column 33. The top elastic member 21 can push the shield 19 downward in a natural state, so that the shield 19 covers the outside of the area on the vertical cylinder 17 where the drainage outlet is provided.

[0054] The lifting assembly includes a lifting cylinder 7 and an annular block 32. The lifting cylinder 7 is installed at the bottom of the reaction vessel 1. The annular block 32 is installed on the driving output end of the lifting cylinder 7. The annular block 32 is located at the bottom of the inner cavity of the reaction vessel 1. The annular block 32 is supported on the bottom of the external spiral auger 12. The lifting cylinder 7 can drive the annular block 32 to move upward, thereby driving the external spiral auger 12 to move upward.

[0055] When the present invention is in use, ferrous sulfate, ferrous chloride solution, etc. to be reacted are first injected into the reaction container 1, and then the stirring drive motor 8 is started. The stirring drive motor 8 drives the pipetting auger 18 to rotate, driving the solution in the reaction container 1 to be sucked into the vertical cylinder 17 through the filter hole 171 at the bottom of the vertical cylinder 17. The solution flows upward to the discharge outlet and then is discharged into the inner cavity of the reaction container 1. The solution flows in the reaction container 1, which is equivalent to stirring the solution, thereby accelerating the reaction rate.

[0056] After the ferrous hydroxide precipitate is generated, the stirring drive motor 25 is started, and the stirring drive motor 25 drives the vertical cylinder 17 to rotate, driving the stirring blade 16 to rotate clockwise, and the vertical plate 161 in the stirring blade 16 drives the precipitate deposited at the bottom of the reaction vessel 1 to rotate, and the precipitate moves toward the side wall of the reaction vessel 1 under the centrifugal force, that is, moves toward the external spiral auger 12. Then the lifting motor 9 drives the transmission gear 20 to rotate, the transmission gear 20 drives the transmission ring gear 10 to rotate, the transmission ring gear 10 drives the external spiral auger 12 to rotate, and the external spiral auger 12 drives the precipitate at the bottom to move upward, and the precipitate is lifted to the top of the first sieve plate 13, and falls downward under the action of gravity, and passes through the first sieve plate 13, the second sieve plate 14 and the bottom sieve plate 15 in sequence to achieve classification, and finally a part of the precipitate is retained above the first sieve plate 13, the second sieve plate 14 and the bottom sieve plate 15.

[0057] Then the lifting cylinder 4 is started, and the lifting cylinder 4 drives the pressing plate 11 to move downward. The pressing plate 11 is pressed on the first sieve plate 13 and pushes the first sieve plate 13 to move downward. Finally, the first sieve plate 13, the second sieve plate 14, and the bottom sieve plate 15 are stacked together. At this time, the state is as follows: Figure 6 As shown, the sediment above the first sieve plate 13, the second sieve plate 14 and the bottom sieve plate 15 is squeezed and falls downward through the sieve holes on the corresponding sieve plates, and finally becomes smaller and falls below the bottom sieve plate 15, which is equivalent to crushing and refining the sediment.

[0058] After that, the lifting cylinder 4 continues to drive the pressing plate 11 to move downward, and the pressing plate 11 drives each sieve plate to continue to move downward, so that the gap between the bottom sieve plate 15 and the bottom surface of the reaction container 1 becomes smaller. Then, the lifting cylinder 7 drives the annular block 32 to move upward, and the annular block 32 blocks the gap between the second sleeve 23 and the reaction container 1, so that a closed space is formed at the bottom of the reaction container 1, and the crushed sediment is contained in the closed space.

[0059] At this time, since the pressing plate 11 has moved downward to be separated from the shield 19, the shield 19 moves downward under the action of the top elastic member 21 to a position covering the liquid discharge outlet on the vertical cylinder 17, and oxygen is injected into the inner cavity of the shield 19 through the air inlet pipe 6. The oxygen enters the interior of the vertical cylinder 17 through the liquid discharge outlet and is blown out through the filter hole 171 at the bottom of the vertical cylinder 17. The blown oxygen enters the V-shaped inner cavity of the stirring blade 16 and is discharged through the exhaust hole 163. In this process, the stirring blade 16 rotates counterclockwise, and the push inclined plate 162 pushes the precipitate to move upward. The oxygen blown out from the exhaust hole 163 is blown onto the precipitate, and contacts the precipitate more fully, so that the precipitate is oxidized more quickly to form a solid precipitate containing iron hydroxide.

[0060] The present invention can crush and refine the ferrous hydroxide precipitate by arranging a crushing screen component, and make the refined ferrous hydroxide gather together; the oxygen supply component can transport oxygen to the gathered ferrous hydroxide precipitates, so that the ferrous hydroxide precipitate can react more fully with oxygen, and the oxidation reaction efficiency can be effectively improved.

Claims

1. A mixing device for producing a hydroxy iron-based desulfurization catalyst, comprising a reaction vessel, wherein a solution stirring assembly is provided in the reaction vessel, characterized in that: The reaction vessel is also provided with a sedimentation and stirring assembly, a crushing screen assembly, a lifting assembly and an oxygen supply assembly, and the sedimentation and stirring assembly includes a stirring blade located at the bottom of the reaction vessel; The crushing screen assembly includes a pressing plate that can move up and down and at least two sieve plates located below the pressing plate and arranged in sequence up and down, and each sieve plate is elastically slidably installed inside the reaction container up and down; the lifting assembly includes an external spiral auger, and the external spiral auger sleeve is arranged on the outside of the crushing screen assembly, and the top end of the external spiral auger extends to the top of the sieve plate located at the top, and the bottom end extends to the bottom of the reaction container; the oxygen supply assembly includes an exhaust hole for outputting oxygen, and the exhaust hole is located below the bottom sieve plate; When the stirring blade rotates, it can drive the sediment deposited at the bottom of the reaction container to move toward the bottom of the external spiral auger under the action of centrifugation. When the external spiral auger rotates, it can lift the sediment to above the sieve plate at the top. The pressure plate can move downward to push the sieve plates closer to each other, and squeeze the sediment on the sieve plates to pass through the sieve plates and fall to under the sieve plate at the bottom. The exhaust hole can discharge oxygen toward the sediment that falls under the sieve plate at the bottom.

2. A mixing device for producing a hydroxy iron-based desulfurization catalyst according to claim 1, characterized in that: The solution stirring assembly includes a vertical cylinder and a pipetting auger. The vertical cylinder is arranged inside the reaction container. The pipetting auger is installed in the inner cavity of the vertical cylinder. The bottom of the vertical cylinder is provided with a filter hole, and the top is provided with a drainage outlet. The pipetting auger can rotate in the vertical cylinder to drive the solution in the reaction container into the vertical cylinder through the filter hole, and make the solution in the vertical cylinder move toward the drainage outlet and be discharged into the inner cavity of the reaction container.

3. A mixing device for producing a hydroxy iron-based desulfurization catalyst according to claim 2, characterized in that: The sedimentation stirring assembly includes a plurality of stirring blades connected to the bottom of the vertical cylinder. The cross section of the stirring blades is V-shaped with the opening facing downward. The stirring blades include a vertical plate and a push inclined plate connected to the top of the vertical plate. The vertical cylinder can rotate around the vertical center axis to drive the stirring blades to rotate and stir the sediment deposited at the bottom of the reaction container.

4. A mixing device for producing a hydroxy iron-based desulfurization catalyst according to claim 3, characterized in that: The crushing screen assembly includes a first screen plate, a second screen plate and a bottom screen plate which are arranged in sequence from top to bottom, a third elastic member is connected between the bottom screen plate and the vertical cylinder, a second elastic member is connected between the second screen plate and the bottom screen plate, a first elastic member is connected between the first screen plate and the second screen plate, a first sleeve is provided on the upper and lower outer sides of the first screen plate for movable sleeves, the first sleeve and the first screen plate are prevented from falling off in the upper and lower directions, a second sleeve is provided on the upper and lower outer sides of the second screen plate for movable sleeves, the second sleeve and the second screen plate are prevented from falling off in the upper and lower directions, and the outer diameter of the first sleeve is smaller than the inner diameter of the second sleeve.

5. A mixing device for producing a hydroxy iron-based desulfurization catalyst according to claim 4, characterized in that: The oxygen supply assembly also includes a shield and an air inlet pipe. The shield can be slid up and down and is mounted on the outside of the vertical cylinder. The air inlet pipe is connected to the inner cavity of the shield. The shield can be moved to cover the discharge outlet so that the air inlet pipe is connected to the inner cavity of the vertical cylinder through the shield. The V-shaped inner cavity of the stirring blade is connected to the filter hole at the bottom of the vertical cylinder, and the exhaust hole is opened at the top of the stirring blade.

6. A mixing device for producing a hydroxy iron-based desulfurization catalyst according to claim 5, characterized in that: A top elastic part is connected between the shield and the top inner wall of the reaction container. The shield is located above the pressure plate and is stopped by the pressure plate at the top and bottom. The shield is pushed to above the discharge outlet by the pressure plate during the stirring reaction. During the oxidation reaction, the shield is separated from the pressure plate and is pushed downward by the top elastic part to cover the discharge outlet.

7. A mixing device for producing a hydroxy iron-based desulfurization catalyst according to any one of claims 1 to 6, characterized in that: An external spiral auger can be installed inside the reaction vessel and can move up and down. A lifting cylinder is provided at the bottom of the reaction vessel. The driving output end of the lifting cylinder is connected to a ring block. The ring block is supported at the bottom of the external spiral auger. The lifting cylinder can drive the ring block to move upward, so that the ring block is sealed between the reaction vessel and the bottom sieve plate, so that a closed space is formed below the bottom sieve plate.

8. A mixing device for producing a hydroxy iron-based desulfurization catalyst according to any one of claims 1 to 6, characterized in that: The lifting assembly also includes a lifting drive assembly, which includes a lifting motor, a transmission gear and a transmission ring gear. The transmission ring gear is coaxial with the external spiral auger and is connected to the top of the external spiral auger. The lifting motor is connected to the transmission gear to drive the transmission gear to rotate. The transmission gear is meshed with the transmission ring gear to drive the transmission ring gear to rotate, thereby driving the external spiral auger to rotate.

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