A device and method for recycling waste mercury catalyst

Abstract

The present invention relates to the technical field of waste mercury catalyst recovery, specifically to a waste mercury catalyst recovery and reuse device and method, including a recovery furnace, a reaction furnace and a calcining furnace, wherein the recovery furnace is used to recover the waste mercury catalyst, the reaction furnace is used to boil the waste mercury catalyst with lime milk, the calcining furnace is used to pyrometallurgically smelt the waste mercury catalyst after the reaction, a discharge pipe is provided at the bottom of the recovery furnace, and the recovery furnace is connected to the reaction furnace through the bottom discharge pipe; a fixed frame is installed on the outside of the recovery furnace. The present invention realizes the effect of fully crushing the waste mercury catalyst inside the storage barrel in sequence through the waste mercury catalyst crushing mechanism, so that the waste mercury catalyst that meets the particle size falls into the reaction furnace, thereby ensuring that the crushed waste mercury catalyst and lime milk are fully boiled and reacted, thereby ensuring the reaction efficiency of the waste mercury catalyst, and at the same time ensuring the subsequent mercury recovery rate.

Description

Technical Field

[0001] The present invention relates to the technical field of waste mercury catalyst recovery, and in particular to a waste mercury catalyst recovery and reuse device and method. Background Art

[0002] Waste mercury catalyst is a catalyst widely used in oil refining, chemical industry, pharmaceutical industry and other industrial fields. It gradually loses its activity during the production process and becomes waste. The calcium carbide process PVC industry is the most important field in my country's mercury pollution prevention and control, and it is also one of the main sources of waste mercury catalyst. Waste mercury catalyst contains a large amount of mercury, which is a highly toxic heavy metal element with characteristics such as biological toxicity, bioaccumulation, persistence and long-distance transmission.

[0003] At present, when the existing waste mercury catalyst is recycled, the waste mercury catalyst is first soaked or boiled with 10% to 15% NaOH or 15% Na2CO3 or lime milk (calcium oxide mass fraction 20%) to convert the HgCl2 therein into mercuric oxide. This step is called chemical pretreatment. Then, it is placed in a metal tank and heated to 700 to 800°C to separate it into mercury vapor, and the metallic mercury is recovered by condensation. For example, the existing patent publication number CN118904403A discloses a waste mercury catalyst recycling and treatment device and method.

[0004] However, when the waste mercury catalyst is boiled with lime milk, due to the different shapes and sizes of the waste mercury catalyst, that is, the waste mercury catalyst is relatively large, so that the surface of the waste mercury catalyst cannot be fully exposed to the lime milk for reaction or adsorption, and the larger waste mercury catalyst will also affect the reaction efficiency and the subsequent mercury recovery rate. Summary of the invention

[0005] The object of the present invention is to provide a device and method for recycling waste mercury catalyst to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a waste mercury catalyst recovery and reuse device, comprising a recovery furnace, a reaction furnace and a calcining furnace, wherein the recovery furnace is used to recover the waste mercury catalyst, the reaction furnace is used to boil the waste mercury catalyst with lime milk, the calcining furnace is used to pyrometallurgically smelt the waste mercury catalyst after the reaction, and a discharge pipe is provided at the bottom of the recovery furnace, and the recovery furnace is connected to the reaction furnace through the discharge pipe;

[0007] A fixing frame is installed on the outside of the recovery furnace, and the recovery furnace is fixedly installed above the reaction furnace through the fixing frame;

[0008] The inside of the recovery furnace is provided with a storage cylinder and a grinding cylinder from top to bottom in sequence, the top of the recovery furnace is provided with a feed pipe, and a sealing cover is installed on the top of the feed pipe, and the bottom of the feed pipe extends to the inside of the storage cylinder;

[0009] A waste mercury catalyst crushing mechanism is connected between the storage cylinder and the grinding cylinder, and a driving mechanism for driving the waste mercury catalyst crushing mechanism is installed on the top of the recovery furnace. The driving mechanism cooperates with the waste mercury catalyst crushing mechanism to crush the waste mercury catalyst into particles of a certain size before entering the reaction furnace;

[0010] The recovery furnace is provided with a ventilation pipe, and the ventilation pipe is connected with a dust treatment mechanism. While the waste mercury catalyst is being crushed, the dust treatment mechanism purifies the mercury-containing waste gas.

[0011] Furthermore, the storage barrel is fixedly installed at the top of the recovery furnace, the bottom of the storage barrel is funnel-shaped, and the bottom of the storage barrel is connected to a connecting pipe, and the bottom of the storage barrel is connected to the grinding barrel through the connecting pipe.

[0012] Furthermore, an extension edge is provided on the outer side of the bottom of the grinding cylinder, and the grinding cylinder is fixedly connected to the inner wall of the recovery furnace through the extension edge;

[0013] The bottom of the grinding cylinder is provided with a mounting opening, and the support plate is fixedly installed at the mounting opening, and a plurality of discharge holes are arranged around the support plate.

[0014] Furthermore, the waste mercury catalyst crushing mechanism includes a sealing piston, an upper supporting sleeve, a lower supporting sleeve, a connecting rod, a supporting shaft, a grinding piece, a dredging piece and a closing piece, wherein the sealing piston is fixedly mounted on the top of the storage barrel, the sealing piston is cooperatively connected to the outside of the upper supporting sleeve, the upper supporting sleeve passes through the recovery furnace and the top of the storage barrel, and the upper supporting sleeve is connected to the driving mechanism;

[0015] The bottom of the upper support sleeve extends to the connecting pipe, two upper connecting blocks are installed on the outer side of the upper support sleeve, and two connecting rods are provided, the top ends of the two connecting rods are respectively fixedly connected to the two upper connecting blocks, and the bottom end of the connecting rod is fixedly connected to a lower connecting block, and the lower connecting block is fixedly installed on the outer side of the top end of the lower support sleeve;

[0016] The grinding member is connected to the lower supporting sleeve;

[0017] The dredging member is connected to the upper supporting sleeve, and the dredging member is used to dredge the plurality of discharge holes;

[0018] The support shaft passes through the upper support sleeve and the lower support sleeve, and the support shaft is rotatably connected to the upper support sleeve and the lower support sleeve respectively through the sealed bearing, the bottom of the support shaft is connected to the grinding member, and the top of the support shaft is connected to the driving mechanism;

[0019] The closure member is located at the bottom of the storage barrel and is connected to the upper support sleeve. The closure member is used to open and close the connecting pipe. In the present invention, the waste mercury catalyst crushing mechanism is provided to fully crush the waste mercury catalyst.

[0020] Further, the grinding member includes a grinding block, a fixed plate, a first rotating shaft, a second rotating shaft, a supporting block, a supporting frame and a swinging member, the grinding block is located inside the grinding cylinder, the diameter of the grinding block is smaller than the inner diameter of the grinding cylinder, two fixed plates are provided, and the two fixed plates are fixedly mounted on the grinding block, both ends of the first rotating shaft are fixedly connected to the two fixed plates, a mounting hole is provided on the Y axis of the second rotating shaft, and the first rotating shaft passes through the mounting hole, and the first rotating shaft is rotatably connected to the second rotating shaft through the mounting hole;

[0021] The support blocks are provided with two, and the two ends of the second rotating shaft are rotatably connected with the two support blocks, the two support blocks are both located above the grinding block, the top of the support frame is fixedly sleeved on the outside of the lower supporting sleeve, and the two ends of the bottom of the support frame are fixedly connected with the two support plates, the swing member is connected with the bottom of the support shaft, and the swing member is connected with the two fixed plates. In the present invention, the grinding member is provided to achieve the function of grinding the waste mercury catalyst.

[0022] Further, the swing member includes a swing plate, a rotating ball, a synchronous rod and a swing rod, one end of the swing plate is fixedly connected to the bottom of the support shaft, and the other end of the swing plate is provided with a spherical groove, the rotating ball passes through the spherical groove, and the rotating ball is rotatably connected to the spherical groove;

[0023] One end of the synchronization rod is fixedly connected to the rotating ball, and two swing rods are provided, one end of the two swing rods is fixedly connected to the synchronization rod, and the other end of the swing rod is fixedly connected to the fixed plate. In the present invention, the swinging member is provided to achieve the effect of swinging the grinding block.

[0024] Further, the dredging member includes a synchronous plate, a positioning rod, a sealing sleeve, a support ring, an arc plate and a dredging rod, the synchronous plate is fixedly sleeved on the outside of the upper support sleeve and is located above the closing member, two positioning rods are provided, and the two positioning rods are respectively fixedly mounted at both ends of the synchronous plate, two sealing sleeves are provided, the two sealing sleeves are fixedly passed through the bottom of the storage barrel, the positioning rod slides through the sealing sleeve, and the bottoms of the two positioning rods pass through the extension edge and are fixedly connected to the support ring, and the positioning rod is slidably connected to the extension edge;

[0025] There are multiple arc plates, which are distributed around the inner side of the support ring, one end of the arc plate is fixedly connected to the inner wall of the support ring, there are multiple dredging rods, which are fixedly installed on the arc plates, and the dredging rods are located directly below the discharge hole. In the present invention, the dredging member is provided to achieve the function of dredging the discharge hole.

[0026] Further, the closing member includes a closing block, the closing block is fixedly sleeved on the outer side of the upper support sleeve, the closing block is provided with a conical surface and a contact surface, the conical surface is located on the upper surface of the closing block, and the contact surface is located on the outer side of the bottom of the closing block, and the closing block is in funnel-shaped contact with the bottom of the storage barrel through the contact surface. In the present invention, the opening and closing of the connecting pipe is achieved by providing a closing member.

[0027] Further, the driving mechanism includes an internally threaded sleeve, a first rotating member, a sealing shell, a sliding sleeve, a limiting strip, a supporting shell and a second rotating member, the internally threaded sleeve is rotatably connected to the top of the recovery furnace through a bearing seat, the upper supporting sleeve is provided with an external thread at a position corresponding to the internally threaded sleeve, and the internally threaded sleeve is sleeved on the outer side of the upper supporting sleeve through a thread, the sealing shell is installed on the top of the recovery furnace, and the first rotating member is located at the sealing shell, and the first rotating member is used to drive the internally threaded sleeve;

[0028] There are two limit bars, which are fixedly mounted on the outside of the top of the support shaft, the bottom of the sliding sleeve is slidably sleeved on the outside of the top of the support shaft, and the sliding sleeve is provided with limit grooves at positions corresponding to the two limit bars, the support shell is fixedly mounted on the top of the recovery furnace, and the support shell is rotatably sleeved on the outside of the sliding sleeve, the second rotating member is mounted inside the support shell, and the second rotating member is used to drive the sliding sleeve. In the present invention, the driving mechanism is provided to achieve the function of driving the upper support sleeve and the support shaft respectively.

[0029] A method for using a waste mercury catalyst recovery and reuse device comprises the following steps:

[0030] Step 1: Open the sealing cover on the top of the recovery furnace, at which time the closing block seals the connecting pipe, and then put the recycled waste mercury catalyst into the storage shell in sequence until the storage shell is filled with waste mercury catalyst, and then close the sealing cover to make the inside of the recovery furnace in a sealed state;

[0031] Step 2: The first rotating member at the driving mechanism operates so that the upper supporting sleeve drives the supporting shaft and the lower supporting sleeve to move upward synchronously, so that the closing block is separated from the connecting pipe. Subsequently, a certain amount of waste mercury catalyst falls into the grinding cylinder through the connecting pipe, and the driving mechanism operates so that the closing block closes the top of the connecting pipe.

[0032] Step 3: The support shaft is rotated by operating the second rotating member at the driving mechanism. When the support shaft is rotating, the grinding block is swung and ground inside the grinding cylinder by the swinging member to fully grind the large pieces of waste mercury catalyst. During the grinding process, the waste mercury catalyst that meets the particle size falls from the bottom of the recovery furnace into the reaction furnace through the discharge hole.

[0033] Step 4: The first rotating member at the driving mechanism is operated again to open the top of the connecting pipe so that the waste mercury catalyst continues to fall into the grinding cylinder, and while opening, the discharge hole is cleared by a plurality of clearing rods so that the waste mercury catalyst that meets the particle size after grinding falls from the discharge hole, and the dust treatment mechanism is operated to collect dust particles while the waste mercury catalyst is crushed;

[0034] Step 5: The ground waste mercury catalysts are all dropped into the reactor for chemical reaction. After the reaction, they are placed in the calcining furnace for direct calcination. The mercury vapor generated during calcination is passed into the condensation system, and the mercury vapor is converted into metallic mercury for recovery through the condensation system.

[0035] Compared with the prior art, the present invention has at least the following beneficial effects:

[0036] 1. When the present invention is used, a storage cylinder and a grinding cylinder are sequentially arranged inside the recovery furnace, so that a large amount of recycled waste mercury catalyst can be placed inside the storage cylinder, and then the sealing cover on the recovery furnace is closed to seal the recovery furnace to prevent dust and other gases from overflowing. The waste mercury catalyst crushing mechanism is provided to fully crush the waste mercury catalyst inside the storage cylinder in sequence, and the waste mercury catalyst with a particle size that meets the requirements falls into the reaction furnace, thereby ensuring that the crushed waste mercury catalyst is fully boiled and reacted with lime milk, thereby ensuring the reaction efficiency of the waste mercury catalyst and the subsequent mercury recovery rate;

[0037] 2. When the present invention is in use, the dust treatment mechanism is provided, so that during the reaction of the waste mercury catalyst, the dust particles generated can be treated, the mercury-containing gas can be separated, and the subsequent mercury recovery reaction is facilitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0039] Figure 2 It is a side view of the overall structure of the present invention;

[0040] Figure 3 This is a schematic diagram of the recovery furnace structure of the present invention;

[0041] Figure 4 This is a schematic diagram of the internal structure of the recovery furnace of the present invention;

[0042] Figure 5 It is a schematic diagram of the structure of the storage cylinder and the grinding cylinder in the recovery furnace of the present invention;

[0043] Figure 6 This is a schematic diagram of the internal structure of the storage barrel of the present invention;

[0044] Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure of the middle A area;

[0045] Figure 8 It is a schematic diagram of the ventilation pipe structure of the present invention;

[0046] Fig. 9 For the present invention Figure 8 Schematic diagram of the enlarged structure of the middle B area;

[0047] Fig.10 This is a schematic diagram of the internal structure of the grinding cylinder of the present invention;

[0048] Fig.11 For the present invention Fig.10 Schematic diagram of the enlarged structure of the middle C area;

[0049] Fig.12 This is a schematic diagram of the structure of the curved plate of the present invention;

[0050] Fig.13 This is a schematic diagram of the structure of the grinding block of the present invention;

[0051] Fig.14 It is a schematic diagram of the extended edge structure of the present invention;

[0052] Fig.15 For the present invention Fig.14 Schematic diagram of the enlarged structure of the middle D area;

[0053] Fig.16 For the present invention Fig.14 Schematic diagram of the enlarged structure of the middle E area;

[0054] Fig.17 It is a schematic diagram of the support shaft structure of the present invention.

[0055] Reference numerals:

[0056] 1. Recovery furnace; 11. Discharge pipe; 12. Fixing frame; 13. Storage barrel; 131. Connecting pipe; 14. Grinding barrel; 141. Extended edge; 142. Support plate; 1421. Discharge hole; 15. Feed pipe; 151. Sealing cover; 16. Ventilation pipe; 2. Reactor; 3. Calcining furnace; 4. Waste mercury catalyst crushing mechanism; 41. Sealing piston; 42. Upper support sleeve; 421. Upper connecting block; 422. Lower connecting 1, second rotating gear; 2, second rotating gear; 3, second rotating gear; 4, second rotating gear; 5, second rotating gear; 6, second rotating gear; 7, first rotating gear; 8, second rotating gear; 9, second rotating gear; 10, second rotating gear; 11, second rotating gear; 12, second rotating gear; 13, second rotating gear; 14, second rotating gear; 15, second rotating gear; 16, second rotating gear; 17, second rotating gear; 18, second rotating gear; 19, second rotating gear; 20, second rotating gear; 21, second rotating gear; 22, second rotating gear; 23, second rotating gear; 24, second rotating gear; 25, second rotating gear; 26, second rotating gear; 27, second rotating gear; 28, second rotating gear; 29, second rotating gear; 30, second rotating gear; 31, second rotating gear; 32, second rotating gear; 33, second rotating gear; 34, second rotating gear; 35, second rotating gear; 36, second rotating gear; 37, second rotating gear; 38, second rotating gear; 39, second rotating gear; 40, second rotating gear; 41, second rotating gear; 42, second rotating gear; 43, second rotating gear; 44, second rotating gear; 45, second rotating gear; 46, second rotating gear; 47, second rotating gear; 48, second rotating gear; 49, second rotating gear; 50, second rotating gear; 51, second rotating gear; 52, first rotating gear; 53, first rotating gear; 54, first rotating gear; 55, first rotating gear; 56, second rotating gear; 57, first rotating gear; 58, first rotating gear; 59, second rotating gear; 60, second rotating gear; 61, second rotating gear; 62, second rotating gear; 63, first rotating gear; 64, second rotating gear; 65, first rotating gear; Two rotating shafts; 75, support block; 76, support frame; 77, swing member; 771, swing plate; 7711, spherical groove; 772, rotating ball; 773, synchronization rod; 774, swing rod; 8, clearing member; 81, synchronization plate; 82, positioning rod; 83, sealing sleeve; 84, support ring; 85, arc plate; 86, clearing rod; 9, closing member; 91, closing block; 911, conical surface; 912, contact surface. DETAILED DESCRIPTION

[0057] 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. Example

[0058] Embodiment 1

[0059] See also Figures 1 to 3 A waste mercury catalyst recovery and reuse device comprises a recovery furnace 1, a reaction furnace 2 and a calcining furnace 3. The recovery furnace 1 is used to recover the waste mercury catalyst, and the reaction furnace 2 is used to boil the waste mercury catalyst with lime milk. The calcining furnace 3 is used to smelt the waste mercury catalyst after the reaction by pyrometallurgy. A discharge pipe 11 is provided at the bottom of the recovery furnace 1, and the recovery furnace 1 is connected to the reaction furnace 2 through the bottom discharge pipe 11.

[0060] A fixing frame 12 is installed on the outside of the recovery furnace 1, and the recovery furnace 1 is fixedly installed above the reaction furnace 2 through the fixing frame 12. In this embodiment, a mounting pipe is also provided on the top of the reaction furnace 2, and the mounting pipe is connected to the bottom of the recovery furnace 1. A control valve is also installed on the mounting pipe to control the opening and closing of the mounting pipe, thereby ensuring that the waste mercury catalyst can fall into the reaction furnace 2 through the bottom of the recovery furnace 1.

[0061] See also Figures 4 to 5 A storage cylinder 13 and a grinding cylinder 14 are sequentially arranged inside the recovery furnace 1 from top to bottom. A feeding pipe 15 is arranged at the top of the recovery furnace 1, and a sealing cover 151 is installed at the top of the feeding pipe 15. The bottom of the feeding pipe 15 extends to the inside of the storage cylinder 13. The bottom of the recovery furnace 1 is arranged in a funnel shape, thereby ensuring that the ground waste mercury catalyst can fully fall into the inside of the reaction furnace 2 through the bottom of the recovery furnace 1.

[0062] See also Figures 6 to 13 , Fig.17 A waste mercury catalyst crushing mechanism 4 is connected between the storage cylinder 13 and the grinding cylinder 14. A driving mechanism 5 for driving the waste mercury catalyst crushing mechanism 4 is installed on the top of the recovery furnace 1. The driving mechanism 5 cooperates with the waste mercury catalyst crushing mechanism 4 to crush the waste mercury catalyst into particles of a certain size before entering the reaction furnace 2.

[0063] The storage barrel 13 is fixedly installed at the top of the recovery furnace 1 . The bottom of the storage barrel 13 is funnel-shaped, and a connecting pipe 131 is connected to the bottom of the storage barrel 13 . The bottom of the storage barrel 13 is connected to the grinding barrel 14 through the connecting pipe 131 .

[0064] An extension edge 141 is provided on the outer side of the bottom of the grinding cylinder 14, and the grinding cylinder 14 is fixedly connected to the inner wall of the recovery furnace 1 through the extension edge 141;

[0065] The bottom of the grinding cylinder 14 is provided with a mounting opening, and a support plate 142 is fixedly installed at the mounting opening, and a plurality of discharge holes 1421 are arranged around the support plate 142;

[0066] The waste mercury catalyst crushing mechanism 4 includes a sealing piston 41, an upper supporting sleeve 42, a lower supporting sleeve 43, a connecting rod 44, a supporting shaft 45, a grinding member 7, a dredging member 8 and a closing member 9. The sealing piston 41 is fixedly mounted on the top of the storage barrel 13, and the sealing piston 41 is connected to the outside of the upper supporting sleeve 42. The upper supporting sleeve 42 passes through the recovery furnace 1 and the top of the storage barrel 13, and the upper supporting sleeve 42 is connected to the driving mechanism 5.

[0067] The bottom of the upper support sleeve 42 extends to the connecting pipe 131, and two upper connecting blocks 421 are installed on the outer side of the upper support sleeve 42. Two connecting rods 44 are provided, and the top ends of the two connecting rods 44 are fixedly connected to the two upper connecting blocks 421 respectively, and the bottom end of the connecting rod 44 is fixedly connected to the lower connecting block 422, and the lower connecting block 422 is fixedly installed on the outer side of the top end of the lower support sleeve 43;

[0068] The grinding member 7 is connected to the lower support sleeve 43;

[0069] The dredging member 8 is connected to the upper support sleeve 42, and the dredging member 8 is used to dredge the multiple discharge holes 1421;

[0070] The support shaft 45 passes through the upper support sleeve 42 and the lower support sleeve 43, and the support shaft 45 is rotatably connected to the upper support sleeve 42 and the lower support sleeve 43 through sealed bearings, the bottom of the support shaft 45 is connected to the grinding, and the top of the support shaft 45 is connected to the driving mechanism 5;

[0071] See also Figure 10 to Figure 11 The closing piece 9 is located at the bottom of the storage barrel 13 , and the closing piece 9 is connected to the upper support sleeve 42 . The closing piece 9 is used to open and close the connecting pipe 131 .

[0072] See also Fig.10 and Figure 12 to Figure 13 The grinding member 7 includes a grinding block 71, a fixed plate 72, a first rotating shaft 73, a second rotating shaft 74, a supporting block 75, a supporting frame 76 and a swinging member 77. The grinding block 71 is located inside the grinding cylinder 14. The diameter of the grinding block 71 is smaller than the inner diameter of the grinding cylinder 14, and the top of the grinding block 71 is in a cone shape, so as to prevent the waste mercury catalyst from accumulating on the top of the grinding block 71. In this embodiment, the grinding block 71 is kept at a certain distance from the inside of the grinding cylinder 14, so that when the grinding block 71 swings the waste mercury catalyst inside the grinding cylinder 14, the inner wall of the grinding cylinder 14 does not affect the grinding block 71. Two fixed plates 72 are provided, and the two fixed plates 72 are fixedly mounted on the grinding block 71. The two ends of the first rotating shaft 73 are fixedly connected to the two fixed plates 72. A mounting hole is provided on the Y axis of the second rotating shaft 74, and the first rotating shaft 73 passes through the mounting hole, and the first rotating shaft 73 is rotatably connected to the mounting hole.

[0073] There are two support blocks 75, and both ends of the second rotating shaft 74 are rotatably connected to the two support blocks 75. The two support blocks 75 are both located above the grinding block 71. The top of the support frame 76 is fixedly sleeved on the outer side of the lower support sleeve 43, and the two ends of the bottom of the support frame 76 are fixedly connected to the two support plates 142. The swing member 77 is connected to the bottom of the support shaft 45, and the swing member 77 is connected to the two fixed plates 72.

[0074] The swing member 77 includes a swing plate 771, a rotating ball 772, a synchronous rod 773 and a swing rod 774. One end of the swing plate 771 is fixedly connected to the bottom of the support shaft 45, and the other end of the swing plate 771 is provided with a spherical groove 7711. The rotating ball 772 passes through the spherical groove 7711, and the rotating ball 772 is rotatably connected to the spherical groove 7711.

[0075] One end of the synchronization rod 773 is fixedly connected to the rotating ball 772 , and two swing rods 774 are provided. One end of the two swing rods 774 is fixedly connected to the synchronization rod 773 , and the other end of the swing rod 774 is fixedly connected to the fixing plate 72 .

[0076] Specifically, when the support shaft 45 rotates, the swing plate 771 rotates synchronously, and when the swing plate 771 rotates, the rotating ball 772 is driven to rotate synchronously. Since the rotating ball 772 is limited by the spherical groove 7711, the rotating ball 772 drives the two fixed plates 72 to swing through the synchronization rod 773 and the two swing rods 774. Since the two fixed plates 72 are fixedly connected to the grinding block 71, and the two fixed plates 72 are limited by the first rotating shaft 73 and the second rotating shaft 74, the two fixed plates 72 drive the grinding block 71 to swing and grind along the bottom end of the grinding cylinder 14 to a certain extent, thereby grinding the waste mercury catalyst between the grinding block 71 and the support plate 142. After grinding, the waste mercury catalyst that meets the particle size falls to the bottom of the recovery furnace 1 through the discharge hole 1421, and falls into the reaction furnace 2 through the bottom of the recovery furnace 1.

[0077] See also Fig.10 and Fig.12 The dredging member 8 includes a synchronous plate 81, a positioning rod 82, a sealing sleeve 83, a support ring 84, an arc plate 85 and a dredging rod 86. The synchronous plate 81 is fixedly sleeved on the outer side of the upper support sleeve 42. Two positioning rods 82 are provided. The two positioning rods 82 are respectively fixedly installed at both ends of the synchronous plate 81. Two sealing sleeves 83 are provided. The two sealing sleeves 83 are fixedly passed through the bottom of the storage barrel 13. The positioning rods 82 slide through the sealing sleeves 83, and the bottoms of the two positioning rods 82 pass through the extension edge 141 and are fixedly connected to the support ring 84. The positioning rods 82 are slidably connected to the extension edge 141.

[0078] There are multiple arc plates 85, which are distributed around the inner side of the support ring 84, one end of the arc plate 85 is fixedly connected to the inner wall of the support ring 84, and there are multiple dredging rods 86, which are fixedly installed on the arc plates 85, and the dredging rods 86 are located directly below the discharge hole 1421;

[0079] In this embodiment, a sealing sleeve 83 is provided to make the positioning rod 82 and the sealing sleeve 83 cooperate with each other, so that when the positioning rod 82 moves up and down relative to the sealing sleeve 83, it can ensure that the inside of the storage barrel 13 is in a sealed state;

[0080] See also Figure 10 to Figure 11 The closing member 9 includes a closing block 91, which is fixedly sleeved on the outer side of the upper supporting sleeve 42. A conical surface 911 and a contact surface 912 are respectively provided on the closing block 91. The conical surface 911 is located on the upper surface of the closing block 91, and the contact surface 912 is located on the outer side of the bottom of the closing block 91. The closing block 91 is in funnel-shaped contact with the bottom of the storage barrel 13 through the contact surface 912.

[0081] See also Figures 4 to 9 The driving mechanism 5 includes an internal threaded sleeve 51, a first rotating member 52, a sealing shell 53, a sliding sleeve 54, a limiting strip 55, a supporting shell 56 and a second rotating member 57. The internal threaded sleeve 51 is rotatably connected to the top of the recovery furnace 1 through a bearing seat. The upper supporting sleeve 42 is provided with an external thread at a position corresponding to the internal threaded sleeve 51, and the internal threaded sleeve 51 is connected to the outer side of the upper supporting sleeve 42 through a threaded sleeve. The sealing shell 53 is installed on the top of the recovery furnace 1, and the first rotating member 52 is located at the sealing shell 53. The first rotating member 52 is used to drive the internal threaded sleeve 51;

[0082] There are two limit bars 55, which are fixedly installed on the outer side of the top of the support shaft 45. The bottom of the sliding sleeve 54 is slidably sleeved on the outer side of the top of the support shaft 45, and the sliding sleeve 54 is provided with limit grooves 541 at the positions corresponding to the two limit bars 55. The support shell 56 is fixedly installed on the top of the recovery furnace 1, and the support shell 56 is rotatably sleeved on the outer side of the sliding sleeve 54. The second rotating member 57 is installed inside the support shell 56, and the second rotating member 57 is used to drive the sliding sleeve 54.

[0083] In this example, a limit bar 55 is installed on the top of the support shaft 45 to ensure that the support shaft 45 can rotate synchronously with the sliding sleeve 54 through the limit bar 55. At the same time, when the sliding sleeve 54 is rotating, since the support shaft 45 moves upward along the recovery furnace 1 through the upper support sleeve 42, the support shaft 45 can move up and down relative to the sliding sleeve 54 under the connection action of the limit bar 55, that is, it is ensured that the support shaft 45 can rotate while not affecting the up and down movement of the support shaft 45.

[0084] Specific implementation process: first, open the sealing cover 151 on the top of the feed pipe 15, put the collected waste mercury catalyst into the storage barrel 13 inside the recovery furnace 1 through the feed pipe 15, and fill the storage barrel 13 with waste mercury catalyst, then close the sealing cover 151 to keep the inside of the recovery furnace 1 sealed;

[0085] Subsequently, the internal threaded sleeve 51 is rotated by the operation of the first rotating member 52, and when the internal threaded sleeve 51 rotates, a driving force is provided to the upper supporting sleeve 42, and because the upper supporting sleeve 42 is limited by the synchronous plate 81 and the two positioning rods 82, the upper supporting sleeve 42 drives the supporting shaft 45 inside it to move upward synchronously, that is, at this time, the grinding block 71 moves upward relative to the inside of the grinding cylinder 14, and at the same time, the contact surface 912 at the bottom of the closing block 91 is separated from the bottom of the discharge cylinder, that is, the closing block 91 is separated from the top of the connecting pipe 131, and the waste mercury catalyst located in the storage barrel 13 enters the connecting pipe 131 under the action of gravity, and falls into the grinding barrel 14. When a certain amount of mercury catalyst falls into the storage barrel 13, the first rotating mechanism is operated to make the contact surface 912 of the closing block 91 return to the funnel-shaped position at the bottom of the storage barrel 13, and fit tightly with the bottom of the storage barrel 13.

[0086] The second rotating mechanism 57 is operated to rotate the support shaft 45. When the support shaft 45 rotates, the swing member 77 drives the grinding block 71 to swing along the inside of the grinding cylinder 14, so as to further achieve the function of fully crushing and grinding the waste mercury catalyst between the grinding cylinder 14 and the grinding block 71. After grinding, the waste mercury catalyst with the particle size that meets the requirements falls to the bottom of the recovery furnace 1 through the discharge hole 1421, and then falls from the bottom of the recovery furnace 1 into the reaction furnace 2.

[0087] The first rotating member 52 is operated again, so that the closing block 91 is separated from the bottom of the storage barrel 13 again. At the same time, the upper support sleeve 42 drives the support ring 84 to move upward through the two positioning rods 82. When the support ring 84 moves upward, it simultaneously drives the multiple arc plates 85 to move upward. When the arc plates 85 move upward, they drive the dredging rods 86 to move upward. Then, the multiple dredging rods 86 move upward along the multiple discharge holes 1421 respectively, further achieving the function of dredging the multiple discharge holes 1421 on the support plate 142.

[0088] At the same time, the waste mercury catalyst in the storage barrel 13 continues to fall into the grinding barrel 14, and the support shaft 45 rotates to grind the waste mercury catalyst. This reciprocating operation further grinds the waste mercury catalyst to a particle size that meets the requirements, and then falls into the reaction furnace 2 through the recovery furnace 1. Embodiment 2

[0089] See also Figures 14 to 17, Embodiment 2 is a further supplementary explanation of Embodiment 1, specifically: a vent pipe 16 is installed on the recovery furnace 1, and a dust treatment mechanism 6 is connected to the vent pipe 16. While the waste mercury catalyst is being crushed, the dust treatment mechanism 6 purifies the mercury-containing waste gas. The dust treatment mechanism 6 includes an electric dust collector 61, an output pipe 62, a first straight bevel gear 63, a second straight bevel gear 64, a rotating shaft 65, a rotating block 66 and a rotating blade 67. One end of the vent pipe 16 is connected to the electric dust collector 61, and the output end of the electric dust collector 61 is connected to the output end. The output pipe 62 is connected, and one end of the output pipe 62 is connected to the reaction furnace 2. A moving hole 631 is provided inside the first spur bevel gear 63, and the first spur bevel gear 63 is slidably sleeved on the outside of the support shaft 45 through the moving hole 631. Two sliders 68 are fixedly installed inside the moving hole 631. The support shaft 45 is provided with a slide groove 451 at a position corresponding to the slider 68, and the slider 68 is slidably connected at the slide groove 451. The bottom of the first spur bevel gear 63 is rotatably connected with a positioning frame 69, and the positioning frame 69 is fixedly installed inside the connecting pipe 131;

[0090] The first spur bevel gear 63 is located between the upper support sleeve 42 and the lower support sleeve 43, the second spur bevel gear 64 is meshedly connected with the first spur bevel gear 63, and one end of the rotating shaft 65 is fixedly connected with the second spur bevel gear 64, the other end of the rotating shaft 65 passes through the connecting pipe 131 and extends to the vent pipe 16, and the rotating shaft 65 is rotatably connected with the connecting pipe 131, the rotating block 66 is located at the vent pipe 16, and the rotating block 66 is fixedly connected with the rotating shaft 65, and a plurality of rotating blades 67 are provided, and the plurality of rotating blades 67 are distributed around the outer side of the rotating block 66;

[0091] For further explanation, a plurality of openings are provided at the extended edge 141 of the grinding cylinder 14, and the dust generated by grinding moves through the openings to the cavity formed between the grinding cylinder 14 and the storage cylinder 13 and the recovery furnace 1;

[0092] Specifically: when the support shaft 45 rotates, the first spur bevel gear 63 is driven to rotate synchronously, and when the first spur bevel gear 63 rotates, the second spur bevel gear 64 is caused to rotate synchronously, and then the rotating shaft 65 is rotated, so that the rotating block 66 drives the plurality of rotating blades 67 to rotate, and when the rotating blades 67 rotate, the dust in the cavity is introduced into the electrostatic precipitator 61, and the dust particles are collected by the electrostatic precipitator 61, and the mercury-containing gas enters the reaction furnace 2 through the output pipe 62 for subsequent reaction;

[0093] In addition, in this embodiment, the dust particles are fully processed to prevent the subsequent dust particles from affecting the condensation of mercury vapor and the occurrence of mercury soot, thereby further ensuring the recovery of mercury vapor. Embodiment 3

[0094] See also Figures 4 to 7 , Embodiment 3 is a further supplementary description of the first rotating member 52 and the second rotating member 57 in Embodiment 1, specifically: the first rotating member 52 includes a first rotating motor 521, a first rotating gear 522 and a second rotating gear 523, the first rotating motor 521 is fixedly installed inside the sealed shell 53, and the output end of the first rotating motor 521 is fixedly connected to the first rotating gear 522, the second rotating gear 523 is meshedly connected to the first rotating gear 522, and the second rotating gear 523 is fixedly sleeved on the outside of the internal threaded sleeve 51;

[0095] Thus, the first rotating motor 521 is operated, so that the first rotating gear 522 drives the second rotating gear 523 to rotate, and further the internal threaded sleeve 51 rotates on the top of the recovery furnace 1;

[0096] The second rotating member 57 includes a second rotating motor 571, a first rotating gear 572 and a second rotating gear 573. The second rotating motor 571 is fixedly installed inside the supporting shell 56. The output end of the second rotating motor 571 is fixedly connected to the first rotating gear 572. The second rotating gear 573 is meshed and connected with the second rotating gear 573. The second rotating gear 573 is fixedly sleeved on the outer side of the sliding sleeve 54.

[0097] Thus, the second rotating motor 571 operates, so that the first rotating gear 572 drives the second rotating gear 573 to rotate, and when the second rotating gear 573 rotates, the sliding sleeve 54 is further rotated relative to the supporting shell 56. Embodiment 4

[0098] A method for using a waste mercury catalyst recovery and reuse device comprises the following steps:

[0099] Step 1: Open the sealing cover 151 on the top of the recovery furnace 1. At this time, the closing block 91 seals the connecting pipe 131, and the recycled waste mercury catalyst is put into the storage shell in sequence until the storage shell is filled with waste mercury catalyst. Then, the sealing cover 151 is closed to make the inside of the recovery furnace 1 in a sealed state;

[0100] Step 2: The first rotating member 52 at the driving mechanism 5 operates to make the upper supporting sleeve 42 drive the supporting shaft 45 and the lower supporting sleeve 43 to move upward synchronously, so that the closing block 91 is separated from the connecting pipe 131. Subsequently, a certain amount of waste mercury catalyst falls into the grinding cylinder 14 through the connecting pipe 131, and the driving mechanism 5 operates to make the closing block 91 close the top of the connecting pipe 131.

[0101] Step 3: The second rotating member 57 of the driving mechanism 5 is operated to rotate the support shaft 45. When the support shaft 45 rotates, the grinding block 71 is swung and ground inside the grinding cylinder 14 through the swing member 77 to fully grind the large pieces of waste mercury catalyst. During the grinding process, the waste mercury catalyst that meets the particle size falls from the bottom of the recovery furnace 1 into the reaction furnace 2 through the discharge hole 1421;

[0102] Step 4: The first rotating member 52 at the driving mechanism 5 is operated again to open the top of the connecting pipe 131, so that the waste mercury catalyst continues to fall into the grinding cylinder 14, and while opening, the discharge hole 1421 is cleared by multiple clearing rods 86, so that the waste mercury catalyst that meets the particle size after grinding falls from the discharge hole 1421, and the reciprocating operation is carried out, and while the waste mercury catalyst is crushed, the dust treatment mechanism 6 is operated to collect dust particles;

[0103] Step 5: The ground waste mercury catalyst falls into the reaction furnace 2 for chemical reaction. After the reaction, it is placed in the calcining furnace 3 for direct calcination. The mercury vapor generated during calcination is passed into the condensation system, and the mercury vapor is converted into metallic mercury for recovery through the condensation system.

[0104] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0105] 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. A waste mercury catalyst recovery and reuse device, comprising a recovery furnace (1), a reaction furnace (2) and a calcining furnace (3), wherein the recovery furnace (1) is used to recover the waste mercury catalyst, the reaction furnace (2) is used to boil the waste mercury catalyst with lime milk, and the calcining furnace (3) is used to perform pyrometallurgy on the waste mercury catalyst after the reaction, characterized in that: A discharge pipe (11) is provided at the bottom of the recovery furnace (1), and the recovery furnace (1) is connected to the reaction furnace (2) through the discharge pipe (11); A fixing frame (12) is installed on the outside of the recovery furnace (1), and the recovery furnace (1) is fixedly installed above the reaction furnace (2) via the fixing frame (12); A storage barrel (13) and a grinding barrel (14) are sequentially arranged inside the recovery furnace (1) from top to bottom; a feed pipe (15) is arranged on the top of the recovery furnace (1), and a sealing cover (151) is installed on the top of the feed pipe (15); the bottom of the feed pipe (15) extends into the interior of the storage barrel (13); the bottom of the storage barrel (13) is connected to the grinding barrel (14) through a connecting pipe (131); an extension edge (141) is arranged on the outer side of the bottom of the grinding barrel (14), and the grinding barrel (14) is fixedly connected to the inner wall of the recovery furnace (1) through the extension edge (141); a plurality of openings are arranged at the extension edge (141) of the grinding barrel (14); A waste mercury catalyst crushing mechanism (4) is connected between the storage cylinder (13) and the grinding cylinder (14); a driving mechanism (5) for driving the waste mercury catalyst crushing mechanism (4) is installed on the top of the recovery furnace (1); the driving mechanism (5) and the waste mercury catalyst crushing mechanism (4) cooperate with each other to crush the waste mercury catalyst into particles of a certain size before entering the reaction furnace (2); the waste mercury catalyst crushing mechanism (4) comprises a sealing piston (41), an upper supporting sleeve (42), a lower supporting sleeve (43), a connecting rod (44), a supporting shaft (45), a grinding member (7), a dredging member (8) and a closing member (9); The recovery furnace (1) is provided with a vent pipe (16), and a dust treatment mechanism (6) is connected to the vent pipe (16). The dust treatment mechanism (6) purifies the mercury-containing waste gas while the waste mercury catalyst is crushed. The dust treatment mechanism (6) comprises an electric dust collector (61), an output pipe (62), a first spur bevel gear (63), a second spur bevel gear (64), a rotating shaft (65), a rotating block (66) and a rotating blade (67); the first spur bevel gear (63) is located between an upper support sleeve (42) and a lower support sleeve (43), the second spur bevel gear (64) is meshedly connected to the first spur bevel gear (63), one end of the rotating shaft (65) is fixedly connected to the second spur bevel gear (64), and the other end of the rotating shaft (65) passes through a connecting pipe (131) and extends to the vent pipe (16).

2. The waste mercury catalyst recovery and recycling device according to claim 1, characterized in that: The storage barrel (13) is fixedly mounted at the top end of the recovery furnace (1), and the bottom of the storage barrel (13) is funnel-shaped.

3. The waste mercury catalyst recovery and recycling device according to claim 2, characterized in that: The bottom of the grinding cylinder (14) is provided with a mounting opening, and a support plate (142) is fixedly mounted at the mounting opening, and a plurality of discharge holes (1421) are arranged around the support plate (142).

4. The waste mercury catalyst recovery and recycling device according to claim 3 is characterized in that: The sealing piston (41) is fixedly mounted on the top of the material storage barrel (13), the sealing piston (41) is cooperatively connected to the outside of the upper support sleeve (42), the upper support sleeve (42) penetrates the recovery furnace (1) and the top of the material storage barrel (13), and the upper support sleeve (42) is connected to the driving mechanism (5); The bottom of the upper support sleeve (42) extends to the connecting pipe (131), two upper connecting blocks (421) are installed on the outer side of the upper support sleeve (42), two connecting rods (44) are provided, the top ends of the two connecting rods (44) are respectively fixedly connected to the two upper connecting blocks (421), and the bottom end of the connecting rod (44) is fixedly connected to a lower connecting block (422), and the lower connecting block (422) is fixedly installed on the outer side of the top end of the lower support sleeve (43); The grinding element (7) is connected to the lower supporting sleeve (43); The dredging member (8) is connected to the upper supporting sleeve (42), and the dredging member (8) is used to dredge the plurality of discharge holes (1421); The support shaft (45) passes through the upper support sleeve (42) and the lower support sleeve (43), and the support shaft (45) is rotatably connected to the upper support sleeve (42) and the lower support sleeve (43) respectively through a sealed bearing, the bottom of the support shaft (45) is connected to the grinding member (7), and the top of the support shaft (45) is connected to the driving mechanism (5); The closing piece (9) is located at the bottom of the storage barrel (13), and the closing piece (9) is connected to the upper support sleeve (42). The closing piece (9) is used to open and close the connecting pipe (131).

5. The waste mercury catalyst recovery and recycling device according to claim 4, characterized in that: The grinding member (7) comprises a grinding block (71), a fixed plate (72), a first rotating shaft (73), a second rotating shaft (74), a supporting block (75), a supporting frame (76) and a swinging member (77); the grinding block (71) is located inside the grinding cylinder (14); the diameter of the grinding block (71) is smaller than the inner diameter of the grinding cylinder (14); two fixed plates (72) are provided, and the two fixed plates (72) are fixedly mounted on the grinding block (71); two ends of the first rotating shaft (73) are fixedly connected to the two fixed plates (72); a mounting hole is provided on the Y axis of the second rotating shaft (74), and the first rotating shaft (73) passes through the mounting hole; the first rotating shaft (73) is rotatably connected to the second rotating shaft (74) through the mounting hole; Two support blocks (75) are provided, and the two ends of the second rotating shaft (74) are rotatably connected to the two support blocks (75), and the two support blocks (75) are both located above the grinding block (71). The top of the support frame (76) is fixedly sleeved on the outside of the lower supporting sleeve (43), and the two ends of the bottom of the support frame (76) are fixedly connected to the two support plates (142). The swing member (77) is connected to the bottom of the support shaft (45), and the swing member (77) is connected to the two fixed plates (72).

6. The waste mercury catalyst recovery and recycling device according to claim 5, characterized in that: The swing member (77) comprises a swing plate (771), a rotating ball (772), a synchronization rod (773) and a swing rod (774); one end of the swing plate (771) is fixedly connected to the bottom of the support shaft (45); the other end of the swing plate (771) is provided with a spherical groove (7711); the rotating ball (772) passes through the spherical groove (7711), and the rotating ball (772) is rotatably connected to the spherical groove (7711); One end of the synchronization rod (773) is fixedly connected to the rotating ball (772), and two swing rods (774) are provided. One end of the two swing rods (774) is fixedly connected to the synchronization rod (773), and the other end of the swing rod (774) is fixedly connected to the fixing plate (72).

7. The waste mercury catalyst recovery and recycling device according to claim 6, characterized in that: The dredging member (8) comprises a synchronous plate (81), a positioning rod (82), a sealing sleeve (83), a support ring (84), an arc plate (85) and a dredging rod (86); the synchronous plate (81) is fixedly sleeved on the outside of the upper support sleeve (42) and is located above the closing member (9); two positioning rods (82) are provided, and the two positioning rods (82) are respectively fixedly mounted on two ends of the synchronous plate (81); two sealing sleeves (83) are provided, and the two sealing sleeves (83) are fixedly passed through the bottom of the storage barrel (13); the positioning rod (82) slidably passes through the sealing sleeve (83), and the bottoms of the two positioning rods (82) pass through the extension edge (141) and are fixedly connected to the support ring (84); the positioning rod (82) is slidably connected to the extension edge (141); A plurality of the arc-shaped plates (85) are provided, and the plurality of the arc-shaped plates (85) are distributed around the inner side of the support ring (84), and one end of the arc-shaped plate (85) is fixedly connected to the inner wall of the support ring (84). A plurality of the dredging rods (86) are provided, and the plurality of the dredging rods (86) are fixedly mounted on the arc-shaped plates (85), and the dredging rods (86) are located directly below the discharge hole (1421).

8. The waste mercury catalyst recovery and recycling device according to claim 7, characterized in that: The closing member (9) comprises a closing block (91), the closing block (91) being fixedly sleeved on the outside of the upper supporting sleeve (42), the closing block (91) being provided with a conical surface (911) and a contact surface (912), the conical surface (911) being located on the upper surface of the closing block (91), the contact surface (912) being located on the outside of the bottom of the closing block (91), and the closing block (91) being in funnel-shaped contact with the bottom of the storage barrel (13) via the contact surface (912).

9. The waste mercury catalyst recovery and recycling device according to claim 8, characterized in that: The driving mechanism (5) comprises an internally threaded sleeve (51), a first rotating member (52), a sealing shell (53), a sliding sleeve (54), a limiting strip (55), a supporting shell (56) and a second rotating member (57); the internally threaded sleeve (51) is rotatably connected to the top of the recovery furnace (1) via a bearing seat; the upper supporting sleeve (42) is provided with an external thread at a position corresponding to the internally threaded sleeve (51); and the internally threaded sleeve (51) is sleeved on the outside of the upper supporting sleeve (42) via a thread; the sealing shell (53) is mounted on the top of the recovery furnace (1); and the first rotating member (52) is located at the sealing shell (53); the first rotating member (52) is used to drive the internally threaded sleeve (51); Two limit bars (55) are provided, and the two limit bars (55) are fixedly mounted on the outer side of the top of the support shaft (45); the bottom of the sliding sleeve (54) is slidably sleeved on the outer side of the top of the support shaft (45); and the sliding sleeve (54) is provided with limit grooves (541) at positions corresponding to the two limit bars (55); the support shell (56) is fixedly mounted on the top of the recovery furnace (1), and the support shell (56) is rotatably sleeved on the outer side of the sliding sleeve (54); the second rotating member (57) is mounted inside the support shell (56), and the second rotating member (57) is used to drive the sliding sleeve (54).

10. A method for using the waste mercury catalyst recovery and reuse device according to claim 9, characterized in that: The following steps are involved: Step 1: Open the sealing cover (151) on the top of the recovery furnace (1), and the closing block (91) seals the connecting pipe (131), and then the recycled waste mercury catalyst is placed into the storage shell in sequence until the storage shell is filled with waste mercury catalyst, and then the sealing cover (151) is closed to make the inside of the recovery furnace (1) in a sealed state; Step 2: The first rotating member (52) at the driving mechanism (5) is operated so that the upper supporting sleeve (42) drives the supporting shaft (45) and the lower supporting sleeve (43) to move upward synchronously, so that the closing block (91) is separated from the connecting pipe (131); then, a certain amount of waste mercury catalyst falls into the grinding cylinder (14) through the connecting pipe (131), and the driving mechanism (5) is operated so that the closing block (91) closes the top of the connecting pipe (131); Step 3: The second rotating member (57) at the driving mechanism (5) is operated to rotate the support shaft (45). When the support shaft (45) is rotating, the grinding block (71) is swung and ground inside the grinding cylinder (14) through the swing member (77), so that large pieces of waste mercury catalyst are fully ground. During the grinding process, waste mercury catalyst of a suitable particle size falls from the bottom of the recovery furnace (1) into the reaction furnace (2) through the discharge hole (1421); Step 4: The first rotating member (52) at the driving mechanism (5) is operated again to open the top of the connecting pipe (131) so that the waste mercury catalyst continues to fall into the grinding cylinder (14). At the same time, the discharge hole (1421) is cleared by the plurality of clearing rods (86) so that the waste mercury catalyst that meets the particle size after grinding falls from the discharge hole (1421). The reciprocating operation is carried out, and while the waste mercury catalyst is crushed, the dust treatment mechanism (6) is operated to collect dust particles. Step 5: The ground waste mercury catalyst falls into the reaction furnace (2) for chemical reaction. After the reaction, it is placed in the calcination furnace (3) for direct calcination. The mercury vapor generated during calcination is passed into the condensation system, and the mercury vapor is converted into metallic mercury through the condensation system for recovery.

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