Suspension type reaction device for reducing valence state of chromium ions

Abstract

The utility model relates to the technical field of heavy metal treatment devices, in particular to a suspension type reaction device for reducing the valence state of chromium ions, which comprises an electrochemical catalytic oxidation pond, a rotating mechanism, a driving mechanism, a stirring assembly and a suspension bin assembly, the rotating mechanism is vertically arranged in the electrochemical catalytic oxidation pond and is provided with a first rotating part and a second rotating part which are opposite in rotating direction, the driving mechanism is connected with the rotating mechanism to drive the first rotating part and the second rotating part to rotate, the stirring assembly is connected with the first rotating part, and the suspension bin assembly is connected with the second rotating part. The rotation direction of the liquid is opposite to the rotation direction of the catalyst carried by the suspension bin assembly, so that the catalyst in the suspension bin assembly is promoted to be in full contact with the liquid in the electrochemical catalytic oxidation pond, and the reaction conversion rate is increased. The suspension bin assembly can be always suspended in the liquid along with the height change of the liquid level in the electrochemical catalytic oxidation pond, and the catalyst is in contact with the liquid for reaction.

Description

TECHNICAL FIELD

[0001] The utility model relates to heavy metal processing device technical field more specifically, relate to a kind of reaction device of reducing chromium ion valence state of suspension type. BACKGROUND

[0002] After soil is polluted by heavy metal, the heavy metal elements in the soil can be washed away by soil leaching. Soil leaching technology is to mix soil and chemical detergent, so that the heavy metal in the soil and the acid solution react chemically and dissolve in the acid solution. Then the soil and the mixed solution are separated to achieve the repair effect of the soil.

[0003] After part of the soil contaminated by heavy metal is leached and separated, the leaching solution contains a high concentration of hexavalent chromium. Hexavalent chromium is highly toxic and has strong teratogenic, carcinogenic and mutagenic toxicity, which seriously pollutes the environment. Trivalent chromium is a trace element necessary for the human body, and both are the most common stable valence state. The common method for removing chromium is to reduce hexavalent chromium to trivalent chromium, and then increase the pH value to form Cr(OH)3 precipitate for recycling. The common method for reducing chromium is electrochemical catalytic oxidation. In this reaction, iron-carbon mixture is made into a micro-electrolytic catalyst to reduce hexavalent chromium by using the primary cell effect formed between iron and carbon. However, in actual application, the reaction may not be sufficient, and the hexavalent chromium in the solution may not be completely reduced. SUMMARY

[0004] The utility model discloses to overcome the problem of insufficient reaction of hexavalent chromium in the solution in the prior art, and provides a reaction device for reducing the valence state of chromium ions in suspension, so that the solution and the catalyst can be fully contacted to improve the reaction conversion rate.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of a reaction device for reducing the valence state of chromium ions in suspension, which comprises an electrochemical catalytic oxidation tank, a rotating mechanism, a driving mechanism, a stirring assembly and a suspension bin assembly. The rotating mechanism is arranged in the electrochemical catalytic oxidation tank and has a first rotating part and a second rotating part with opposite rotating directions. The driving mechanism is connected with the rotating mechanism to drive the first rotating part and the second rotating part to rotate. The stirring assembly is connected with the first rotating part, and the suspension bin assembly is connected with the second rotating part.

[0006] The utility model discloses a technical scheme, the suspension bin subassembly is used for containing catalyst, and the electrochemical catalytic oxidation pool contains liquid and carries out the reaction, and through electrochemical catalytic oxidation reaction, the hexavalent chromium ion is reduced into trivalent chromium ion, to eliminate heavy metal pollution, through the drive mechanism rotation of rotation mechanism, make stirring subassembly and suspension bin subassembly rotate in opposite directions, and the rotation direction of the liquid in the electrochemical catalytic oxidation pool is opposite with the rotation direction of the catalyst of suspension bin subassembly, promote the catalyst in suspension bin subassembly and the liquid in the electrochemical catalytic oxidation pool fully contact, to improve the reaction conversion rate.

[0007] Further, the rotation mechanism includes a stirring sleeve ring, a through shaft and a gear transmission assembly, the stirring sleeve ring is connected with the electrochemical catalytic oxidation pool in rotation along the vertical direction, the gear transmission assembly has a first end and a second end with opposite rotation directions, the first end is connected with the upper end of the stirring sleeve ring, the second end is connected with the lower end of the through shaft, the through shaft is arranged along the vertical direction, the first rotation part is formed on the stirring sleeve ring, and the second rotation part is formed on the through shaft.

[0008] In the present scheme, the gear transmission assembly forms the first end and the second end with opposite rotation directions to drive the stirring sleeve ring and the through shaft to rotate in opposite directions, promote the catalyst in the suspension bin subassembly and the liquid in the electrochemical catalytic oxidation pool to fully contact, and improve the reaction conversion rate.

[0009] Further, the gear transmission assembly includes a first bearing, a first external gear, a second external gear, a first internal gear and a second internal gear, the first external gear and the second external gear are both connected with the electrochemical catalytic oxidation pool in rotation, the upper end of the stirring sleeve ring is coaxially fixedly connected with the first internal gear, the first external gear is located in the stirring sleeve ring and is engaged with the first internal gear, the second external gear is engaged with the first external gear, the outer ring of the first bearing is fixedly connected with the electrochemical catalytic oxidation pool, the inner ring of the first bearing is coaxially fixedly connected with the second internal gear, the second internal gear is engaged with the second external gear, the bottom end of the through shaft is fixedly connected with the second internal gear, the first end is formed on the first internal gear, and the second end is formed on the second internal gear.

[0010] In the present scheme, the external gears are engaged to obtain opposite rotation directions, and the internal gears and the external gears are engaged to obtain the same rotation directions, thereby obtaining the first end and the second end with opposite rotation directions.

[0011] Further, the driving mechanism comprises a driving motor, a first driving gear and a second driving gear, the fixed end of the driving motor is fixedly connected with the electrochemical catalytic oxidation tank, the output shaft of the driving motor is coaxially fixedly connected with the first driving gear, and the second driving gear is coaxially fixedly connected with the stirring ring and engaged with the first driving gear.

[0012] In the scheme, the gear transmission assembly is driven to move by the driving motor, the first driving gear and the second driving gear.

[0013] Further, the bottom of the electrochemical catalytic oxidation tank is fixedly connected with a bearing ring, the outer side of the bearing ring is sleeved with a bearing, and the outer ring of the bearing is fixedly connected with the inner side of the stirring ring.

[0014] In the scheme, the stirring ring is rotationally connected with the electrochemical catalytic oxidation tank through the bearing ring and the bearing.

[0015] Further, the top of the bearing ring is provided with a first mounting shaft, a second mounting shaft and a support, the first outer gear is rotationally connected to the first mounting shaft, the second outer gear is rotationally mounted on the second mounting shaft, the outer ring of the first bearing is sleeved with a positioning outer ring, and the top end of the support is fixedly connected with the positioning outer ring.

[0016] In the scheme, the first mounting shaft, the second mounting shaft and the support respectively support and connect the first outer gear, the second outer gear and the first bearing.

[0017] Further, the penetrating shaft comprises a plurality of shaft bodies distributed circumferentially along the second inner gear, the bottom of each shaft body is fixedly connected with the second inner gear, and the suspension bin assembly is vertically provided with a plurality of through holes, each shaft body is movably connected with the suspension bin assembly by penetrating through each through hole.

[0018] In the scheme, when the penetrating shaft rotates, each shaft body penetrates through each through hole, so that the suspension bin assembly can be driven to rotate together, and since the penetrating shaft and the suspension bin assembly are movably connected in the vertical direction, the suspension bin assembly can float in the vertical direction.

[0019] Further, the top of the electrochemical catalytic oxidation tank is fixedly connected with a cross beam, the bottom of the cross beam downwardly extends to be provided with a positioning column, the positioning column is sleeved with a positioning bearing, and the outer ring of the positioning bearing is fixedly connected with the top of each shaft body.

[0020] In the scheme, the positioning bearing can position the top of each shaft body, each shaft body rotates around the positioning bearing, and each shaft body is prevented from being separated.

[0021] Further, the suspension bin assembly comprises a catalyst bin, a float member, a retaining rod and a suspension middle cylinder, the retaining rod is fixedly connected with the suspension middle cylinder and extends in the circumferential direction, the catalyst bin and the float member are both annular and surround the outside of the suspension middle cylinder and are fixedly connected with the retaining rod respectively, and the suspension bin assembly is movably connected with the second rotating part in the vertical direction and rotates with the second rotating part.

[0022] In the scheme, the catalyst bin contains catalyst, the float member provides buoyancy, and the retaining rod connects the catalyst bin and the float member with the suspension middle cylinder.

[0023] Further, the catalyst bin has an inner cavity for containing catalyst, and a liquid inlet hole is formed in the side wall of the catalyst bin and communicates with the inner cavity, and a plurality of catalyst bins and a plurality of float members are arranged.

[0024] In the scheme, the inner cavity of the catalyst bin contains catalyst, the solution can contact the catalyst through the liquid inlet hole to react, and the plurality of catalyst bins arranged at intervals can promote the contact between the catalyst and the solution, and the plurality of float members arranged at intervals can provide stable buoyancy.

[0025] Compared with the prior art, the reaction device for reducing the valence state of chromium ions has the following beneficial effects:

[0026] First, the reaction device for reducing the valence state of chromium ions is driven by the driving mechanism to rotate the rotating mechanism, so that the stirring assembly and the suspension bin assembly rotate in opposite directions, the liquid in the electrochemical catalytic oxidation tank rotates in the opposite direction of the catalyst carried by the suspension bin assembly, and the catalyst in the suspension bin assembly is fully contacted with the liquid in the electrochemical catalytic oxidation tank to improve the reaction conversion rate.

[0027] Second, the reaction device for reducing the valence state of chromium ions is movably connected in the vertical direction, can always be suspended in the liquid with the change of the liquid level in the electrochemical catalytic oxidation tank, so that the catalyst in the suspension bin assembly can always be in contact with the liquid to effectively perform the catalytic reaction. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is the overall structure schematic view of the reaction device for reducing the valence state of chromium ions of the utility model;

[0029] Figure 2 is Figure 1Structure diagram of the mechanism at the bottom of the electrochemical catalytic oxidation tank;

[0030] Figure 3 Structure diagram of the rotating mechanism and driving mechanism;

[0031] Figure 4 Structure diagram of the Figure 3 Structure diagram of the mechanism from the lower side;

[0032] Figure 5 Structure diagram of the Figure 3 Structure diagram of the mechanism from the upper side;

[0033] Figure 6 Structure diagram of the suspension tank assembly;

[0034] Figure 7 Structure diagram of the Figure 6 Partial structure diagram of the middle catalyst tank and floating member;

[0035] Figure 8 Connection diagram of the suspension middle tank and penetrating shaft after the outer cylinder structure is removed;

[0036] Figure 9 Structure diagram of the connection between the cross beam at the top of the electrochemical catalytic oxidation tank and the penetrating shaft;

[0037] Figure 10 Structure diagram of the Figure 9 Exploded view;

[0038] Figure 11 Structure diagram of the measuring assembly;

[0039] Figure 12 Sectional view of the retaining rod.

[0040] In the drawings: 1, electrochemical catalytic oxidation tank; 11, bearing ring; 111, electrochemical catalytic oxidation tank bottom wall; 112, ring body; 12, bearing; 13, first mounting shaft; 14, second mounting shaft; 15, support; 16, cross beam; 161, positioning column; 162, positioning bearing; 17, liquid inlet; 18, liquid outlet; 2, rotating mechanism; 21, stirring sleeve ring; 22, through shaft; 221, shaft body; 222, arc step; 23, gear transmission assembly; 231, first bearing; 232, first external gear; 233, second external gear; 234, first internal gear; 235, second internal gear; 236, rotating ring; 237, positioning outer ring; 3, driving mechanism; 31, driving motor; 32, first driving gear; 33, second driving gear; 4, stirring assembly; 5, suspension bin assembly; 51, catalyst bin; 511, inner cavity; 512, liquid inlet hole; 52, float member; 521, float tip; 53, retaining rod; 54, suspension middle cylinder; 541, outer layer cylinder; 542, inner layer disc; 543, through hole; 6, measurement assembly; 61, measurement tube; 62, measurement tank; 63, measurement valve. DETAILED DESCRIPTION

[0041] The drawings are only used for illustrative description, and should not be understood as limiting the patent; in order to better illustrate the embodiment, some components in the drawings can be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures in the drawings and their descriptions can be omitted. The positional relationship described in the drawings is only used for illustrative description, and should not be understood as limiting the patent.

[0042] The same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it should be understood that if the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "long" and "short" is based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, therefore the terms describing the positional relationship in the drawings are only used for illustrative description, and should not be understood as limiting the patent, and for those skilled in the art, the specific meaning of the above terms can be understood according to the specific situation.

[0043] The technical scheme of the utility model will be further specifically described below through specific embodiments and in combination with the drawings:

[0044] Embodiment 1

[0045] Reference Figures 1 to 12 The embodiment discloses a suspension type reaction device for reducing the valence state of chromium ions. Figure 1As shown, the reaction device comprises an electrochemical catalytic oxidation tank 1, a rotating mechanism 2, a driving mechanism 3, a stirring assembly 4 and a suspension bin assembly 5. The rotating mechanism 2 is arranged in the electrochemical catalytic oxidation tank 1 in a vertical direction and has a first rotating part and a second rotating part with opposite rotating directions. The driving mechanism 3 is connected with the rotating mechanism 2 to drive the first rotating part and the second rotating part to rotate. The stirring assembly 4 is connected with the first rotating part. The suspension bin assembly 5 is connected with the second rotating part.

[0046] In the embodiment, the rotating mechanism 2 is driven to rotate by the driving mechanism 3, so that the stirring assembly 4 and the suspension bin assembly 5 rotate in opposite directions in the electrochemical catalytic oxidation tank 1. The rotating direction of the liquid in the electrochemical catalytic oxidation tank 1 is opposite to the rotating direction of the catalyst carried by the suspension bin assembly 5, so that the catalyst in the suspension bin assembly 5 is fully contacted with the liquid in the electrochemical catalytic oxidation tank 1, thereby improving the reaction conversion rate.

[0047] Specifically, the electrochemical catalytic oxidation tank 1 can be in a substantially cylindrical shape. The electrochemical catalytic oxidation tank 1 is provided with a liquid inlet 17 and a liquid outlet 18 on both sides of the bottom thereof. For example, in the process of heavy metal soil acid washing remediation, the liquid inlet 17 can be connected with the mixed liquid separated by solid-liquid separation after acid washing of heavy metal contaminated soil, and the liquid outlet 18 is connected with a heavy metal recovery device in the next step, so that the mixed liquid after soil acid washing is treated in the electrochemical catalytic oxidation tank 1, and the hexavalent chromium ion is reduced to trivalent chromium ion by electrochemical catalytic oxidation reaction, so as to eliminate heavy metal pollution. The suspension bin assembly 5 is used to accommodate the catalyst and can make the catalyst fully contact with the solution in the electrochemical catalytic oxidation tank 1, thereby promoting the reaction. The stirring assembly 4 can be a plurality of stirring paddles, which are uniformly distributed in the circumferential direction of the first rotating part, so as to stir the liquid in the electrochemical catalytic oxidation tank 1.

[0048] Reference Figures 1 to 5 The rotating mechanism 2 comprises a stirring sleeve ring 21, a through shaft 22 and a gear transmission assembly 23. The stirring sleeve ring 21 is connected with the electrochemical catalytic oxidation tank 1 in a vertical direction. The gear transmission assembly 23 has a first end and a second end with opposite rotating directions. The first end is connected with the upper end of the stirring sleeve ring 21. The second end is connected with the lower end of the through shaft 22. The through shaft 22 is arranged in a vertical direction. The first rotating part is formed on the stirring sleeve ring 21. The second rotating part is formed on the through shaft 22.

[0049] Specifically, the stirring sleeve 21 is a substantially hollow ring, and the stirring sleeve 21 is rotationally connected to the bottom of the electrochemical catalytic oxidation tank 1. For example, the stirring sleeve 21 is rotationally connected to the electrochemical catalytic oxidation tank 1 through a bearing. The gear transmission assembly 23 is driven by gears and moves under the driving of the driving mechanism 3. It can be understood that when a pair of external gears are engaged, the rotation shafts of the pair of external gears rotate in opposite directions, so that the first end and the second end with opposite rotation directions can be obtained through the gear transmission assembly 23. Of course, multi-stage gears can also be used in the gear transmission assembly 23 for transmission, or other parts can be further added for transmission, so as to obtain the first end and the second end with different rotation directions, so as to drive the stirring sleeve 21 and the penetrating shaft 22 to rotate in different directions, so that the rotation direction of the liquid in the electrochemical catalytic oxidation tank 1 is opposite to the rotation direction of the catalyst carried by the suspension bin assembly 5, so as to promote the full contact between the catalyst and the solution in the electrochemical catalytic oxidation tank 1, thereby promoting the reaction.

[0050] Further referring to Figures 3 to 5 , the gear transmission assembly 23 includes a first bearing 231, a first external gear 232, a second external gear 233, a first internal gear 234, and a second internal gear 235. The first external gear 232 and the second external gear 233 are each rotationally connected to the electrochemical catalytic oxidation tank 1. The upper end of the inside of the stirring sleeve 21 is coaxially fixedly connected to the first internal gear 234. The first external gear 232 is located in the stirring sleeve 21 and is engaged with the first internal gear 234. The second external gear 233 is engaged with the first external gear 232. The outer ring of the first bearing 231 is fixedly connected to the electrochemical catalytic oxidation tank 1. The inner ring of the first bearing 231 is coaxially fixedly connected to the second internal gear 235. The second internal gear 235 is engaged with the second external gear 233. The bottom end of the penetrating shaft 22 is fixedly connected to the second internal gear 235. The first end is formed on the first internal gear 234, and the second end is formed on the second internal gear 235.

[0051] In the embodiment, the meshing relationship of each gear is as follows: the first inner gear 234 meshes with the first outer gear 232, the first outer gear 232 meshes with the second outer gear 233, and the second outer gear 233 meshes with the second inner gear 235. Therefore, the entire transmission path includes a pair of outer gears meshing and two pairs of inner and outer gears meshing. Since the meshing of the inner and outer gears does not change the rotation direction of the shaft, the meshing of the outer gears changes the rotation direction of the shaft. Therefore, the above transmission relationship can make the stirring sleeve ring 21 and the through shaft 22 have different rotation directions. By selecting a suitable transmission ratio, the stirring sleeve ring 21 and the through shaft 22 can have different rotation speeds. For example, in the embodiment, the linear speed of each meshing gear is consistent, but the diameter of the second inner gear 235 is greater than that of the first inner gear 234. Therefore, the angular speed of the second inner gear 235 is less than that of the first inner gear 234. That is, if the second inner gear 235 rotates one revolution, the first inner gear 234 will rotate more than one revolution, so that the rotation speed of the stirring assembly 4 is greater than that of the catalyst bin 51, which promotes the contact between the catalyst and the liquid and improves the efficiency of the conversion of hexavalent chromium ions to trivalent chromium ions.

[0052] Reference Figures 3 to 5 The first inner gear 234 is fixedly connected to the inner side of the upper end of the stirring sleeve ring 21, and the projection of the first outer gear 232 on the horizontal plane is located in the stirring sleeve ring 21, so that the first outer gear 232 can mesh with the first inner gear 234. The height of the first outer gear 232 in the vertical direction is higher than that of the first inner gear 234, so that the lower end of the first outer gear 232 meshes with the first inner gear 234, and the upper end of the first outer gear 232 extends above the stirring sleeve ring 21. The projection of the axis of the second outer gear 233 on the horizontal plane is located in the stirring sleeve ring 21, so that the structure is compact, and the second outer gear 233 meshes with the upper end of the first outer gear 232. The second inner gear 235 meshes with the second outer gear 233, so that the second outer gear 233 can drive the second inner gear 235 to rotate. The second inner gear 235 is fixedly connected to the inner ring of the first bearing 231, so as to drive the inner ring of the first bearing 231 to rotate. The outer ring of the first bearing 231 is fixedly connected to the electrochemical catalytic oxidation tank 1, which can be connected through an intermediate connecting part, so that the first bearing 231 can be supported above the stirring sleeve ring 21.

[0053] Reference Figures 3 to 5 The inner ring of the first bearing 231 and the second inner gear 235 can be connected through an intermediate part, such as a rotating ring 236. The bottom end of the through shaft 22 can also be indirectly fixedly connected to the second inner gear 235 through the rotating ring 236.

[0054] In the embodiment, the first bearing 231 and the stirring sleeve ring 21 can be coaxially arranged so that the rotation center axis of the penetrating shaft 22 and the stirring sleeve ring 21 is the same. The suspension bin assembly 5 rotates under the driving of the penetrating shaft 22, and the stirring assembly 4 rotates under the driving of the stirring sleeve ring 21, so that the rotation center of the stirring assembly 4 is the same as the rotation center of the suspension bin assembly 5. Both can be located at the center position of the cylindrical electrochemical catalytic oxidation tank 1, thereby covering the electrochemical catalytic oxidation tank 1, promoting liquid stirring and reaction with the catalyst.

[0055] With reference to Figures 3 to 5 In the embodiment, the bottom of the electrochemical catalytic oxidation tank 1 further comprises a bearing ring 11, the outer side of the bearing ring 11 is sleeved with a bearing 12, the outer ring of the bearing 12 is fixedly connected with the inner side of the stirring sleeve ring 21, and the rotation connection between the stirring sleeve ring 21 and the electrochemical catalytic oxidation tank 1 is realized through the bearing ring 11 and the bearing 12. The bearing ring 11 can comprise an electrochemical catalytic oxidation tank bottom wall 111 and a ring body 112 connected to the upper end of the electrochemical catalytic oxidation tank bottom wall 111. The diameter of the bearing ring 11 is smaller than the inner diameter of the stirring sleeve ring 21, so that the bearing ring 11 can extend into the stirring sleeve ring 21. A plurality of bearings 12 can be sleeved on the outer side of the bearing ring 11, the inner ring of the bearing 12 is fixedly connected with the outer side of the bearing ring 11, and the outer ring of the bearing 12 is fixedly connected with the inner side of the stirring sleeve ring 21.

[0056] It can be understood that in the embodiment, if the bearing needs to bear axial load, the bearing type capable of bearing axial load can be selected, for example, cylindrical roller bearing. While playing the role of rotation connection, it can also provide support in the axial direction.

[0057] With reference to Figure 3 And Figure 4 The top of the bearing ring 11 is provided with a first mounting shaft 13, a second mounting shaft 14 and a support 15, the first outer gear 232 is rotationally connected to the first mounting shaft 13, the second outer gear 233 is rotationally mounted on the second mounting shaft 14, the outer ring of the first bearing 231 is sleeved with a positioning outer ring 237, and the top end of the support 15 is fixedly connected with the positioning outer ring 237.

[0058] Specifically, the first mounting shaft 13 and the second mounting shaft 14 are both arranged along the vertical direction, the first mounting shaft 13 is fixedly connected on the top end surface of the bearing ring 11, and the second mounting shaft 14 is fixedly connected to the bottom wall 111 of the electrochemical catalytic oxidation tank, and the projection of the second mounting shaft 14 on the horizontal plane is located in the bearing ring 11. The first outer gear 232 and the second outer gear 233 can be rotatably connected to the upper end of the first mounting shaft 13 and the second mounting shaft 14 respectively through bearings, and the first mounting shaft 13 and the second mounting shaft 14 provide axial support for the first outer gear 232 and the second outer gear 233. Among them, the first mounting shaft 13 and the second mounting shaft 14 are located in the stirring sleeve ring 21, so that the structure is more compact.

[0059] Reference Figure 3 and Figure 4 The penetrating shaft 22 includes a plurality of shaft bodies 221 distributed circumferentially along the second inner gear 235, the bottom of each shaft body 221 is fixedly connected with the second inner gear 235 respectively, and the suspension bin assembly 5 is vertically provided with a plurality of through holes 543, and each shaft body 221 is movably connected with the suspension bin assembly 5 through the through hole 543.

[0060] In the embodiment, the shaft body 221 can be bent from bottom to top. For example, the bottom of the shaft body 221 is fixedly connected with the second inner gear 235 through the rotating ring 236, each shaft body 221 forms a inwardly converging bent structure from the bottom end to the top, and each shaft body 221 converges and extends vertically upward, so that the structure is more compact. While ensuring that the suspension bin assembly 5 has the functions of rotation and floating, the number of shaft bodies 221 can be selected according to actual needs. For example, three shaft bodies 221 are used in the embodiment, and three or more shaft bodies 221 can ensure that the suspension bin assembly 5 remains stable horizontally during vertical floating, thereby ensuring that the chemical reaction of converting hexavalent chromium ions into trivalent chromium ions continues to proceed stably. By connecting the plurality of shaft bodies 221 through the through holes 543 of the suspension bin assembly 5, the suspension bin assembly 5 can not only float stably in the vertical direction, but also rotate with the penetrating shaft 22. Since the suspension bin assembly 5 is movably connected in the vertical direction, it can always float in the liquid as the liquid level in the electrochemical catalytic oxidation tank 1 changes, so that the catalyst in the suspension bin assembly 5 can always contact with the liquid and effectively perform the catalytic reaction.

[0061] Reference Figure 1 , Figure 9 and Figure 10The top of the electrochemical catalytic oxidation tank 1 is fixedly connected with a cross beam 16, the bottom of the cross beam 16 extends downward to be provided with a positioning column 161, the positioning column 161 is sleeved with a positioning bearing 162, and the outer ring of the positioning bearing 162 is fixedly connected with the top of each shaft body 221. Each shaft body 221 is positioned by the positioning bearing 162, and a stable penetrating shaft 22 structure is formed. The top of each shaft body 221 has an arc-shaped step 222 that can match the outer ring of the positioning bearing 162, so as to be fixedly connected with the outer ring of the positioning bearing 162.

[0062] With reference to Figure 1 and Figure 11 The electrochemical catalytic oxidation tank 1 is connected with a measuring assembly 6, the measuring assembly 6 includes a measuring pipe 61, a measuring tank 62 and a measuring valve 63. The measuring pipe 61 is located at the lower end side wall of the electrochemical catalytic oxidation tank 1 and communicates with the inside of the electrochemical catalytic oxidation tank 1, the other end of the measuring pipe 61 is provided with the measuring tank 62, the measuring tank 62 is fixedly connected to the side wall of the electrochemical catalytic oxidation tank 1, and the measuring valve 63 is connected to the measuring pipe 61. By opening the measuring valve 63, the liquid in the electrochemical catalytic oxidation tank 1 can be put into the measuring tank 62, and the liquid in the electrochemical catalytic oxidation tank 1 can be sampled to facilitate monitoring of the reaction progress in the electrochemical catalytic oxidation tank 1.

[0063] Embodiment 2

[0064] With reference to Figure 3 and Figure 4 , the embodiment is similar to embodiment 1, the difference is that in the embodiment, the driving mechanism 3 includes a driving motor 31, a first driving gear 32 and a second driving gear 33, the fixed end of the driving motor 31 is fixedly connected with the electrochemical catalytic oxidation tank 1, the output shaft of the driving motor 31 is coaxially fixedly connected with the first driving gear 32, and the second driving gear 33 is coaxially fixedly connected with the stirring sleeve ring 21 and engaged with the first driving gear 32.

[0065] Specifically, the driving motor 31 is fixedly connected with the outside of the electrochemical catalytic oxidation tank 1 through a motor support. In other embodiments, the driving motor 31 can be fixed on the bottom surface, and the output shaft of the driving motor 31 is output to the first driving gear 32 through other transmission parts, so as to drive the second driving gear 33 and the stirring sleeve ring 21 to rotate.

[0066] Embodiment 3

[0067] With reference to Figure 1 , Figures 6 to 8The embodiment is similar to the embodiment 1, and the difference is that the suspension bin assembly 5 comprises a catalyst bin 51, a floating member 52, a retaining rod 53 and a suspension middle cylinder 54, the retaining rod 53 is fixedly connected with the suspension middle cylinder 54 and extends in the circumferential direction, the catalyst bin 51 and the floating member 52 are both annular and surround the outside of the suspension middle cylinder 54 and are respectively fixedly connected with the retaining rod 53, and the suspension bin assembly 5 is movably connected with the second rotating part in the vertical direction and rotates with the second rotating part.

[0068] Specifically, the catalyst bin 51 can be substantially annular and has an inner cavity 511 for accommodating catalysts, and the catalysts can be micro-electrolytic catalysts made by mixing iron and carbon, which utilize the original cell effect formed between iron and carbon to reduce hexavalent chromium. A liquid inlet hole 512 is formed in the side wall of the catalyst bin 51 and communicates with the inner cavity 511, so that liquid can enter the inner cavity 511 and contact the catalysts. The floating member 52 can also be substantially annular or formed by combining multiple arc shapes into a ring shape. The catalyst bin 51 and the floating member 52 are both provided in plurality, and the diameters of the respective catalyst bins 51 and floating members 52 are different and alternately sleeved in the radial direction, so that the respective catalyst bins 51 and floating members 52 are arranged in the circumferential direction of the suspension middle cylinder 54 in a spaced manner, so as to better and more balancedly provide the suspension bin assembly 5 with buoyancy. When the floating member 52 is arranged in a ring shape, floating tips 521 can be arranged at both ends of the ring-shaped floating member 52 to reduce the liquid resistance during rotation. The catalysts in the suspension bin assembly 5 can always contact the liquid, thereby effectively promoting the chemical reaction of converting hexavalent chromium into trivalent chromium.

[0069] In some embodiments, the floating member 52 can comprise an inner layer floating member and an outer layer floating member, and the catalyst bin 51 can comprise a first bin body, a second bin body and a third bin body. They are arranged in sequence from inside to outside as: the first bin body, the inner layer floating member, the second bin body, the third bin body and the outer layer floating member. By setting appropriate buoyancy, the suspension bin assembly 5 can always be in the liquid, so that the suspension bin assembly 5 is in full contact with the liquid in the electrochemical catalytic oxidation tank 1 and performs a chemical reaction.

[0070] Reference Figure 6 and Figure 7 The floating middle cylinder can comprise an outer layer cylinder 541 and an inner layer disc 542. The outer layer cylinder 541 penetrates in the vertical direction, and the inner layer disc 542 is provided with a plurality of through holes 543 in the vertical direction and is fixedly connected in the outer layer cylinder 541. Each retaining rod 53 is fixedly connected with the outside of the outer layer cylinder 541, and each shaft body 221 is movably connected through the through hole 543 of the inner layer disc 542.

[0071] Reference Figure 6One side surface of the retaining rod 53 is fixedly connected with the catalyst bin 51 and the float member 52, and the other side surface of the retaining rod 53 can be streamlined, so that the resistance to contact with liquid can be reduced. For example, the retaining rod 53 is fixedly connected with the catalyst bin 51 and the float member 52 on the upper side and the lower side respectively. Figure 11 The bottom of the retaining rod 53 on the upper side is fixedly connected with the catalyst bin 51 and the float member 52, and the top is streamlined. The top of the retaining rod 53 on the lower side is fixedly connected with the catalyst bin 51 and the float member 52, and the bottom is streamlined.

[0072] Obviously, the above embodiments of the present application are merely exemplary for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments are not required to be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A suspended reaction apparatus for reducing the valence state of chromium ions, characterized by: The utility model relates to an electrochemical catalytic oxidation tank, which comprises an electrochemical catalytic oxidation tank (1), a rotating mechanism (2), a driving mechanism (3), a stirring assembly (4) and a suspension bin assembly (5), the rotating mechanism (2) is arranged in the electrochemical catalytic oxidation tank (1) and has a first rotating part and a second rotating part with opposite rotating directions, the driving mechanism (3) is connected with the rotating mechanism (2) to drive the first rotating part and the second rotating part to rotate, the stirring assembly (4) is connected with the first rotating part, and the suspension bin assembly (5) is connected with the second rotating part.

2. The suspended reaction apparatus for reducing the valence state of chromium ions according to claim 1, characterized by: The rotating mechanism (2) comprises a stirring sleeve ring (21), a through shaft (22) and a gear transmission assembly (23), the stirring sleeve ring (21) is rotationally connected with the electrochemical catalytic oxidation tank (1) in the vertical direction, the gear transmission assembly (23) has a first end and a second end with opposite rotating directions, the first end is connected with the stirring sleeve ring (21), the second end is connected with the through shaft (22), the through shaft (22) is arranged in the vertical direction, the first rotating part is formed on the stirring sleeve ring (21), and the second rotating part is formed on the through shaft (22).

3. The suspended reaction apparatus for reducing the valence state of chromium ions according to claim 2, characterized by: The gear transmission assembly (23) comprises a first bearing (231), a first external gear (232), a second external gear (233), a first internal gear (234) and a second internal gear (235), the first external gear (232) and the second external gear (233) are both rotationally connected with the electrochemical catalytic oxidation tank (1), the upper end of the stirring sleeve ring (21) is coaxially fixedly connected with the first internal gear (234), the first external gear (232) is located in the stirring sleeve ring (21) and is engaged with the first internal gear (234), the second external gear (233) is engaged with the first external gear (232), the outer ring of the first bearing (231) is fixedly connected with the electrochemical catalytic oxidation tank (1), the inner ring of the first bearing (231) is coaxially fixedly connected with the second internal gear (235), the second internal gear (235) is engaged with the second external gear (233), the bottom end of the through shaft (22) is fixedly connected with the second internal gear (235), the first end is formed on the first internal gear (234), and the second end is formed on the second internal gear (235).

4. The suspended reaction apparatus for reducing the valence state of chromium ions according to claim 2, characterized by: The driving mechanism (3) comprises a driving motor (31), a first driving gear (32) and a second driving gear (33), the fixed end of the driving motor (31) is fixedly connected with the electrochemical catalytic oxidation tank (1), the output shaft of the driving motor (31) is coaxially fixedly connected with the first driving gear (32), and the second driving gear (33) is coaxially fixedly connected with the stirring sleeve ring (21) and is engaged with the first driving gear (32).

5. The suspended reaction apparatus for reducing the valence state of chromium ions according to claim 3, characterized by: The bottom of the electrochemical catalytic oxidation tank (1) is fixedly connected with a bearing ring (11), the outer side of the bearing ring (11) is sleeved with a bearing (12), and the outer ring of the bearing (12) is fixedly connected with the inner side of the stirring sleeve ring (21).

6. The suspended reaction apparatus for reducing the valence state of chromium ions according to claim 5, characterized by: The top of the bearing ring (11) is provided with a first mounting shaft (13), a second mounting shaft (14) and a support (15), the first outer gear (232) is rotatably connected to the first mounting shaft (13), the second outer gear (233) is rotatably mounted on the second mounting shaft (14), the outer ring of the first bearing (231) is sleeved with a positioning outer ring (237), and the top end of the support (15) is fixedly connected with the positioning outer ring (237).

7. The suspended reaction apparatus for reducing the valence state of chromium ions according to claim 3, characterized by: The through shaft (22) comprises a plurality of shaft bodies (221) distributed circumferentially along the second inner gear (235), the bottom of each shaft body (221) is fixedly connected with the second inner gear (235), and the suspension bin assembly (5) is vertically provided with a plurality of through holes (543), each shaft body (221) is movably connected with the suspension bin assembly (5) through the through holes (543).

8. The suspended reaction apparatus for reducing the valence state of chromium ions according to claim 7, characterized by: The top of the electrochemical catalytic oxidation tank (1) is fixedly connected with a cross beam (16), the bottom of the cross beam (16) downwardly extends a positioning column (161), the positioning column (161) is sleeved with a positioning bearing (162), and the outer ring of the positioning bearing (162) is fixedly connected with the top of each shaft body (221).

9. The suspended reaction apparatus for reducing the valence state of chromium ions according to claim 1, characterized by: The suspension bin assembly (5) comprises a catalyst bin (51), a floating piece (52), a retaining rod (53) and a suspension middle cylinder (54), the retaining rod (53) is fixedly connected with the suspension middle cylinder (54) and extends circumferentially, the catalyst bin (51) and the floating piece (52) are annular and arranged outside the suspension middle cylinder (54) and are fixedly connected with the retaining rod (53) respectively, and the suspension bin assembly (5) is movably connected with the second rotating part in the vertical direction and rotates with the second rotating part.

10. The suspended reaction apparatus for reducing the valence state of chromium ions according to claim 9, characterized by: The catalyst bin (51) has an inner cavity (511) for accommodating catalysts, the side wall of the catalyst bin (51) is provided with a liquid inlet hole (512) in communication with the inner cavity (511), and a plurality of catalyst bins (51) and floating pieces (52) are arranged.

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