Chromium-containing industrial wastewater treatment device and treatment process thereof

Abstract

The invention discloses a chromium-containing industrial wastewater treatment device and a treatment process thereof, the treatment process comprises the steps of concentration adjustment, PH adjustment, reduction treatment and neutralization treatment, and the device comprises a treatment box, a mixing device I, a mixing device II and a concentration device; a water inlet pipe I at the top of the treatment box is fixedly connected with the dosing box, a connecting groove and a sliding groove are symmetrically formed in a pair of opposite side walls of the treatment box, access doors are symmetrically arranged on the other pair of opposite side walls of the treatment box, and the drainage pipe is located below one access door and fixedly connected with the treatment box; the supporting frame is used for supporting and fixing the treatment box on the ground, and the spiral discharging device is fixedly connected to a discharging opening in the bottom of the treatment box; the mixing device I is fixedly connected to the top of the treatment box; the two groups of mixing devices II are respectively positioned on two sides of the mixing device I and are fixedly connected with the connecting groove and the inner wall of the treatment box; through cooperation of the mixing device I and the mixing device II, wastewater is rapidly and uniformly mixed with chemicals, and meanwhile, precipitates in supernate are rapidly separated out through the turbulent flow mechanism.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater treatment, and particularly relates to a chromium-containing industrial wastewater treatment device and a treatment process thereof. Background Art

[0002] The chromium in electroplating chromium-containing wastewater exists in the form of Cr 6+ and Cr 3+ Two, due to Cr 6+ It is a serious hazard to agricultural production and people's health, so the chromium-containing wastewater needs to be treated before recycling or discharging;

[0003] After searching, the prior art publication number CN118145764A is a water treatment device for electroplating chromium-containing wastewater. The device absorbs the sediment in the wastewater through the upper half of the rotating rod. The sediment rotates with the rotating rod. When the sediment rotates to the lower end of the rotating rod, it falls off with gravity and is absorbed by a group of rotating rods below. This is repeated to quickly move the sediment to the bottom of the purification tank. However, the rotating rod is a round bare rod, and the area for adsorbing the sediment is limited. When the sediment covering the rotating rod exceeds a certain thickness, the adsorption effect of the rotating rod will decrease, resulting in a decrease in the separation efficiency of the supernatant and the sediment.

[0004] After searching, the prior art announcement number CN221166044U is a device for treating chromium-containing wastewater. The device drives the first rotating rod to rotate through the first motor, so that the stirring rod stirs and mixes the chemical agent and the wastewater; the second motor drives the rotating rod to cooperate with the mounting shaft to control the movable frame to drive the first scraper and the second scraper to move, so that the first scraper scrapes the impurities on the filter plate into the second collection box, and the second scraper scrapes the precipitate generated by the reaction of the wastewater and the agent into the first collection box; but the stirring direction of the stirring rod in the device is single, and it takes a long time to run to mix the wastewater and the chemical agent evenly;

[0005] Therefore, a chromium-containing industrial wastewater treatment device and a treatment process thereof are needed, which can quickly and evenly mix the wastewater and the reagent and quickly achieve solid-liquid separation treatment of the precipitate and the supernatant. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a chromium-containing industrial wastewater treatment device and a treatment process thereof, wherein the wastewater is quickly and evenly mixed with a reagent through the cooperation of a mixing device I and a mixing device II, and the precipitate in the supernatant is quickly separated through a disturbance mechanism.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A chromium-containing industrial wastewater treatment device and a treatment process thereof, the specific treatment process steps are as follows:

[0009] 1) Concentration adjustment: The wastewater with a low chromium concentration is passed through the temporary storage part of the water tank, and the concentration of hexavalent chromium in the wastewater is monitored in real time through the monitoring device; when the hexavalent chromium concentration in the wastewater exceeds 1000 mg / L, the wastewater in the water tank is passed into the wastewater for dilution, so that the hexavalent chromium concentration in the wastewater is controlled between 100 and 1000 mg / L;

[0010] 2) PH adjustment: Add sulfuric acid to the wastewater to control the pH value of the wastewater between 2.5 and 3, so that the hexavalent chromium is converted to Cr2O7 2 The wastewater is then sent to a chromium-containing industrial wastewater treatment plant for treatment;

[0011] 3) Reduction treatment: After the wastewater is added with the reducing agent in the dosing box in the water inlet pipe I, it enters the treatment box. The wastewater and the reducing agent are evenly mixed by the mixing device I and the mixing device II to reduce the hexavalent chromium in the wastewater to trivalent chromium. The reducing agent used in this step is sodium bisulfite, and the dosage ratio is sodium bisulfite: hexavalent chromium = 4:1. The reaction time is 30 to 45 minutes.

[0012] 4) Neutralization treatment: After the reduction treatment is completed, the dosing box adds sodium hydroxide to the wastewater, and at the same time, the mixing device I and the mixing device II cooperate to evenly mix the wastewater and sodium hydroxide, and adjust the pH of the wastewater to 7-8, so that the trivalent chromium generates Cr(OH)3 precipitation; at the same time, the wastewater is precipitated and concentrated by the concentration device;

[0013] The chromium-containing industrial wastewater treatment device in step 2) comprises a treatment box, a mixing device I, a mixing device II, and a concentrating device; the water inlet pipe I on the top of the treatment box is fixedly connected to the dosing box, a pair of opposite side walls of the treatment box are symmetrically provided with connecting grooves and slide grooves, and another pair of opposite side walls are symmetrically provided with inspection doors, and the drain pipe is located below one inspection door and fixedly connected to the treatment box; the support frame supports and fixes the treatment box on the ground, and the spiral discharger is fixedly connected to the discharge port at the bottom of the treatment box; the mixing device I is fixedly connected to the top of the treatment box; the mixing device II is provided with two groups, respectively located at The mixing device I is fixedly connected to the connecting groove and the inner wall of the treatment box on both sides; the concentrating device is located below the mixing device II and connected to the treatment box; the mixing device I includes a screw I, a guide groove I, a guide groove II, a guide rod I, a sliding seat, a rotating seat, an extrusion block, blades, and a spoiler I; the guide grooves I and II are symmetrically fixedly connected to the top of the treatment box, a plurality of gear teeth are provided below the guide groove I, and the guide rod I is located inside the guide groove II and fixedly connected to the treatment box; the screw I is provided inside the guide groove I, one end of the screw I is rotatably connected to the treatment box, and the other end passes through the through hole on the treatment box and is fixed to the treatment box. The output end of motor I is fixedly connected, and motor I is fixedly connected to the processing box through the motor seat; the sliding seat is slidably connected to the guide groove I and the guide groove II, and a limit column with a slide groove on the outside is fixedly connected to the bottom of the sliding seat, and one end of the sliding seat is threadedly connected to the lead screw I, and the other end is slidably connected to the guide rod I; the rotating seat is rotatably connected to the outside of the limit column, a plurality of limit grooves are provided on the side wall of the rotating seat, a connecting plate is provided at the bottom, and the gear on the top of the rotating seat is meshed with the gear teeth on the guide groove I; the extrusion block is provided with a plurality of, and one side of the extrusion block is slidably connected to the slide groove on the rotating seat and the limit column through the limit block The bottom passes through the through holes on the rotating seat and the connecting plate and is fixedly connected to a lever with a plurality of protrusions on the outside, and a spring I is arranged on the outside of the extrusion block; the blades are provided with a plurality of pairs, which are respectively located between adjacent extrusion blocks and fixedly connected to the connecting plate, and a plurality of connecting blocks are symmetrically arranged on the blades; the spoiler I is provided with a plurality of, the spoiler I is rotatably connected to the blades and the connecting blocks through a connecting shaft, the connecting shaft on the spoiler I passes through a through hole on a blade and is fixedly connected to a shift block arranged on one side of the lever, and a pair of torsion springs with opposite opening directions are arranged between the blades and the connecting blocks along the connecting shaft on the spoiler I.

[0014] The mixing device II includes a power mechanism, a guide ring, a water storage box, a connector, a water outlet cylinder, a baffle, a sliding groove II, and an electric push cylinder I; the power mechanism is provided with two groups, which are respectively arranged on both sides of the connecting groove, and one side of the guide rings is connected to the power mechanism; the water storage box is provided with a pair, which are symmetrically fixedly connected to both sides of the processing box, and the water storage box is fixedly connected to the connector through the water inlet pipe II at the bottom, and is fixedly connected to the connecting cylinder through the water outlet pipe with the connector fixed in the middle at the top; one side of the sliding groove II is fixedly connected to the processing box, and both ends are fixedly connected to a pair of water storage boxes; the water outlet The cylinder is provided with several spiral blades I fixedly connected inside the water outlet cylinder, and one end of a pair of connecting pipes are rotatably connected to the two sides of the connecting cylinder respectively, and the other end passes through the connecting ring on the other side of the guide ring and is fixedly connected to the water outlet cylinder; the baffle is L-shaped, and one side of the baffle is fixedly connected to the processing box, the water storage box and the sliding groove II, and a sliding groove I is provided at the bottom; the cylinder body of the electric push cylinder I is located on one side of the sliding groove II and is fixedly connected to the processing box, and the protruding end of the electric push cylinder I is fixedly connected to the connecting seat I with connecting rods fixedly connected at both ends through a connecting plate, and the connecting rod passes through the through hole on the water storage box and is fixedly connected to the sealing block.

[0015] The power mechanism is provided with a connecting rod I, a connecting rod II, a roller, and a motor II; the connecting rod I and the connecting rod II are each provided with a pair, one end of a pair of connecting rods I passes through the through holes on the processing box and is fixedly connected to a pair of gears meshing together, one end of a pair of connecting rods II passes through the through holes on the processing box and is fixedly connected to another pair of gears meshing together, and the other ends of the connecting rods I and II are rotatably connected to the connecting seat on the inner side of the connecting groove; a plurality of rollers are provided, which are symmetrically fixedly connected to the connecting rod I and the connecting rod II respectively; a pair of motors II are provided, which are fixedly connected to one side of the processing box through a motor seat, and the output ends of the pair of motors II are fixedly connected to the gears on a connecting rod I and a connecting rod II respectively.

[0016] The connector is provided with a shell, a guide shaft, a spring II, and a sealing sheet; through holes are provided at the top and bottom of the shell, and the bottoms of several guide shafts are fixedly connected to the shell; the sealing sheet is slidably connected to the guide shaft, and the spring II is arranged above the sealing sheet along the guide shaft.

[0017] The concentrating device comprises a collecting trough, a sliding plate, a sealing cover, an electric push cylinder, a rotating plate I, a spoiler mechanism, a cleaning mechanism, a discharge port, a shielding mechanism, and a motor V; a pair of sliding plates are provided, the sliding plates are slidably connected to the sliding trough, a connecting box I is fixedly connected to the outside of the sliding plate, the cylinder body of the electric push cylinder II is fixedly connected to the top of the connecting box I through a connecting seat, and the extended end of the electric push cylinder II passes through the through hole on the connecting box I and is fixedly connected to the sealing cover; both ends of the collecting trough are fixedly connected to the sliding plate; the electric push cylinder is provided on both sides of the connecting box I, and the cylinder body of the electric push cylinder is fixedly connected to the processing box through a connecting seat, and the extended end of the electric push cylinder is fixedly connected to the connecting seat on the connecting box I; the rotating plate I is connected by a shaft It is rotatably connected to the baffle, and the connecting shaft on the rotating plate I passes through the through hole on the processing box and is fixedly connected to the output end of the motor III, and the motor III is fixedly connected to the processing box through a motor seat; the discharge port is fixedly connected to a connecting box I on a sliding plate, and the spiral blade II arranged in the collecting tank passes through the through hole on the discharge port and is fixedly connected to the output end of the motor IV through the connecting shaft, and the motor IV is fixedly connected to one side of the discharge port through the motor seat; the spoiler mechanism is provided with two groups, and the two groups of spoiler mechanisms are symmetrically fixedly connected on both sides of the collecting tank, and a cleaning mechanism is provided above the spoiler mechanism, and a pair of shielding mechanisms are symmetrically provided below; the motor V is arranged inside the spoiler mechanism, and a bevel gear is provided at the output end of the motor V.

[0018] The spoiler mechanism is provided with a connecting box II, a mounting frame, a filter plate, a spoiler II, a spoiler III, a connecting box, a connecting rod III, an electric motor I, and a sprocket; mounting frames are provided on both sides of the connecting box II, and connecting seats and connecting boxes are respectively fixed at both ends, and a number of filter plates are fixedly connected to the mounting frames; a pair of spoilers III are provided, which are symmetrically connected to the top of the connecting box II through a connecting axis, and the connecting shaft on the spoiler III passes through the through hole on the connecting box II and is fixedly connected to the sprocket; a number of spoilers II are provided, which are rotationally connected to the top of the mounting frame through a connecting shaft; a number of connecting rods III are provided, and the connecting rod III is rotationally connected to the spoiler III and the spoiler II; a pair of electric motors I are provided, which are fixedly connected to the inner side of the connecting box II through a motor seat, and the sprocket on the output end of the electric motor I is connected to the sprocket through a chain.

[0019] The cleaning mechanism is provided with a scraper, a rotating plate II, a lead screw II, a guide rod II, an electric motor II, a guide rod III, a spring III, and a guide cylinder; one end of the lead screw II is rotatably connected to the connecting seat on the connecting box II, and the other end passes through the through hole on the connecting box and is fixedly connected to the sprocket; the scraper is threadedly connected to the lead screw II, and the guide rod II at one end fixedly connected to the connecting box passes through the through hole on the scraper and is fixedly connected to the connecting seat on the connecting box II; the electric motor II is fixedly connected in the connecting box II through the motor seat, and the sprocket on the output end of the electric motor II is connected to the sprocket on the lead screw II through a chain; the rotating plate II is provided with a plurality of guide rods III, which are rotatably connected to the two ends of the scraper and the connecting grooves on the scraper, respectively, and the guide rods III fixedly connected to one side of the rotating plate II are slidably connected to the guide cylinder fixedly connected to the inner side of the scraper; a plurality of springs III are provided, and the springs III are arranged between the scraper and the rotating plate II along the guide rods III and the guide cylinder.

[0020] The shielding mechanism is provided with an extension plate, a connecting seat II, a lead screw III, a support rod and a gear; the extension plate is arranged below the mounting frame, and the bottom of the extension plate is slidably connected to the support rod fixedly connected to the connecting box II through a plurality of connecting seats II; the lead screw III is rotatably connected to the connecting box II, and one end of the lead screw III passes through a through hole on the connecting box II and is fixedly connected to the gear, and the other end is threadedly connected to the connecting seat on the extension plate; the gear is meshed with the gear on the lead screw III, and the gear is rotatably connected to the connecting seat on the inner side of the connecting box II through a connecting shaft, and the connecting shaft on the gear is meshed with the bevel gear on the output end of the motor V through a bevel gear.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1) The motor I in the mixing device I controls the lead screw I to drive the sliding seat to slide along the guide rod I. At the same time, the gear on the rotating seat meshes with the gear teeth on the guide groove I to drive the blades to rotate, so that the wastewater and the reagent on both sides of the treatment box are quickly mixed; at the same time, the limit groove and the spring I cooperate to control the extrusion block to slide along the slide groove on the limit column, so that the lever moves up and down to move the lever block. Under the action of the torsion spring, the spoiler I swings up and down to mix the wastewater and the reagent, further realizing a full chemical reaction between the reagent and the wastewater, and realizing rapid precipitation separation;

[0023] 2) The electric push cylinder Ⅰ in the mixing device Ⅱ is telescopically controlled, and the connection seat Ⅰ cooperates with the connecting rod to drive the sealing block to slide back and forth in the water storage box, so that the pressure in the water storage box changes; when the sealing block is away from the water inlet pipe Ⅱ, the water storage box is in a negative pressure state. At this time, the connector on the water inlet pipe Ⅱ is connected, and the connector on the water outlet pipe is closed, so that the wastewater enters the water storage box through the water inlet pipe Ⅱ; when the sealing block is close to the water inlet pipe Ⅱ, the pressure in the water storage box increases. At this time, the connector on the water outlet pipe is connected, and the connector on the water inlet pipe Ⅱ is closed, so that the wastewater passes through the water outlet pipe and the connecting pipe and is sprayed to the mixing device Ⅰ through the water outlet cylinder, so that the wastewater in the upper and lower layers of the treatment box circulates, disrupts the flow direction of the wastewater in the treatment box on a large scale, and improves the mixing efficiency of the agent and the wastewater; at the same time, the power mechanism and the guide ring cooperate to control the connecting pipe to drive the water outlet cylinder to swing up and down, so that the agent and the wastewater are quickly mixed evenly; and the spiral blade Ⅰ changes the flow direction of the wastewater sprayed out of the water outlet cylinder, and assists the water outlet cylinder to perform turbulent mixing of the wastewater and the agent;

[0024] 3) The flow disturbance mechanism in the concentration device changes the inclination angle of the flow disturbance plate III and the flow disturbance plate II through the cooperation of the electric motor I and the sprocket, adjusts the flow rate of the wastewater, controls the sedimentation rate of the sediment in the wastewater, and makes the sediment produced after the reaction of the wastewater and the reagent to be initially precipitated above the flow disturbance mechanism, thereby reducing the content of the sediment in the wastewater and preventing the sediment from affecting the normal operation of the mixing device II. Then the wastewater enters the mixing device II for circulation;

[0025] 4) The cleaning mechanism in the concentration device moves with the spoiler plate II and the spoiler plate III through the rotating plate II and the spring III. When the spoiler mechanism needs to be cleaned, the electric motor I controls the spoiler plate II and the spoiler plate III to rotate to a state perpendicular to the mounting frame, and the spring III pushes the rotating plate II to reset. Then the electric motor II controls the lead screw II to drive the scraper to slide along the guide rod II to scrape the sediment deposited on the filter plate into the collection tank to prevent the sediment from covering and clogging the filter plate and affecting the subsequent work of the spoiler mechanism; then the electric push cylinder II extends out to control the sealing cover to enter the collection tank and seal the sediment in the collection tank. At the same time, the motor IV controls the spiral blade II to rotate to clear the sediment entering the collection tank from the discharge port to prevent The sediment covers and blocks the spoiler mechanism, affecting the subsequent work of the spoiler mechanism; then the motor V controls the shielding mechanism to cooperate with the gear to drive the lead screw III to rotate, controls the extended plate to expand outward along the support rod to fit the baffle, and drives the spoiler mechanism and the shielding mechanism to descend through the electric push cylinder, the sliding plate, and the collecting trough. After the spoiler mechanism and the shielding mechanism descend to the bottom of the baffle, the shielding mechanism expands outward again to fit the treatment box, and then the electric push cylinder controls the spoiler mechanism and the shielding mechanism to continue to descend, and concentrates the sediment deposited at the bottom of the treatment box to prevent the sediment from being lifted up by the water flow and discharged through the drain pipe together with the supernatant when the supernatant is discharged from the drain pipe, thereby quickly realizing the solid-liquid separation of the sediment and the supernatant. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] AttachedFigure 1 This is a schematic diagram of a chromium-containing industrial wastewater treatment device and its treatment process structure of the present invention;

[0027] Attached Figure 2 Yes Figure 1 Schematic diagram of the internal structure of the processing box;

[0028] Attached Figure 3 Yes Figure 1 Schematic diagram of the structure of the mixing device I;

[0029] Attached Figure 4 Yes Figure 1 Schematic diagram of the connection structure of the middle sliding seat, rotating seat and extrusion block;

[0030] Attached Figure 5 Yes Figure 1 Schematic diagram of the connection structure of the middle blade;

[0031] Attached Figure 6 Yes Figure 5 A schematic diagram of the enlarged structure of part A;

[0032] Attached Figure 7 Yes Figure 1 Schematic diagram of the structure of the middle spoiler I;

[0033] Attached Figure 8 Yes Figure 1 Schematic diagram of the structure of the mixing device II;

[0034] Attached Fig. 9 Yes Figure 1 Schematic diagram of the connection structure between the mixing device II and the rotating plate I;

[0035] Attached Fig.10 Yes Figure 1 Schematic diagram of the internal structure of the water storage box;

[0036] Attached Fig.11 Yes Figure 1 Schematic diagram of the connection structure between the intermediate concentration device and the treatment box;

[0037] Attached Fig.12 Yes Figure 1 Schematic diagram of the connection structure between the middle collecting tank and the sliding plate;

[0038] Attached Fig.13 Yes Figure 1 Schematic diagram of the structure of the intermediate concentration device;

[0039] Attached Fig.14 Yes Figure 1 Schematic diagram of the structure of the middle spoiler mechanism;

[0040] Attached Fig.15 Yes Figure 1A schematic diagram of the structure of the middle shielding mechanism;

[0041] Attached Fig.16 Yes Figure 1 Schematic diagram of the structure of the cleaning mechanism;

[0042] Attached Fig.17 Yes Fig.10 A schematic diagram of the enlarged structure of part B;

[0043] Attached Fig.18 Yes Fig.16 A schematic diagram of the enlarged structure of the middle C part;

[0044] In the figure: 1, treatment box; 101, water inlet pipe Ⅰ; 102, drain pipe; 103, connecting groove; 104, inspection door; 105, slide; 2, mixing device Ⅰ; 201, screw Ⅰ; 2011, motor Ⅰ; 202, guide groove Ⅰ; 203, guide groove Ⅱ; 204, guide rod Ⅰ; 205, sliding seat; 2051, limiting column; 206, rotating seat; 2061, limiting groove; 2062, connecting plate; 207, extrusion block; 2071, spring Ⅰ; 2072, lever; 208, blade; 2081, connecting block; 209, spoiler Ⅰ; 2091, lever block; 2092, torsion spring; 3. Mixing device II; 301. Power mechanism; 3011. Connecting rod I; 3012. Connecting rod II; 3013. Roller; 3014. Motor II; 302. Guide ring; 303. Water storage box; 3031. Water inlet pipe II; 3032. Water outlet pipe; 3033. Connecting tube; 304. Connecting head; 3041. Housing; 3042. Guide shaft; 3043. Spring II; 3044. Sealing sheet; 3 05, water outlet cylinder; 3051, spiral blade Ⅰ; 3052, connecting pipe; 306, baffle; 3061, sliding groove Ⅰ; 307, sliding groove Ⅱ; 308, electric push cylinder Ⅰ; 3081, connecting seat Ⅰ; 3082, connecting rod; 3083, sealing block; 4, concentration device; 401, collecting tank; 402, sliding plate; 4021, connecting box Ⅰ; 4022, electric push cylinder Ⅱ; 403, sealing cover; 404 , electric push cylinder; 405, rotating plate Ⅰ; 4051, motor Ⅲ; 406, spoiler mechanism; 4061, connecting box Ⅱ; 4062, mounting frame; 4063, filter plate; 4064, spoiler Ⅱ; 4065, spoiler Ⅲ; 4066, connecting box; 4067, connecting rod Ⅲ; 4068, electric motor Ⅰ; 4069, sprocket; 407, cleaning mechanism; 4071, scraper; 4072, rotating Plate II; 4073, lead screw II; 4074, guide rod II; 4075, electric motor II; 4076, guide rod III; 4077, spring III; 4078, guide cylinder; 408, discharge port; 4081, motor IV; 4082, spiral blade II; 409, shielding mechanism; 4091, extension plate; 4092, connecting seat II; 4093, lead screw III; 4094, support rod; 4095, gear; 410, motor V; 5, spiral discharger; 6, support frame; 7, medicine adding box. DETAILED DESCRIPTION

[0045] To facilitate the understanding of those skilled in the art, Figure 1-18 , the technical solution of the present invention is further specifically described.

[0046] A chromium-containing industrial wastewater treatment device and a treatment process thereof, the specific treatment process steps are as follows:

[0047] 1) Concentration adjustment: The wastewater with a low chromium concentration is passed through the temporary storage part of the water tank, and the concentration of hexavalent chromium in the wastewater is monitored in real time through the monitoring device; when the hexavalent chromium concentration in the wastewater exceeds 1000 mg / L, the wastewater in the water tank is passed into the wastewater for dilution, so that the hexavalent chromium concentration in the wastewater is controlled between 100 and 1000 mg / L;

[0048] 2) PH adjustment: Add sulfuric acid to the wastewater to control the pH value of the wastewater between 2.5 and 3, so that the hexavalent chromium is converted to Cr2O7 2 The wastewater is then sent to a chromium-containing industrial wastewater treatment plant for treatment;

[0049] 3) Reduction treatment: After the wastewater is added with a reducing agent in the water inlet pipe Ⅰ101 through the dosing box 7, it enters the treatment box 1, and the wastewater and the reducing agent are evenly mixed by the mixing device Ⅰ2 and the mixing device Ⅱ3, so that the hexavalent chromium in the wastewater is reduced to trivalent chromium; the reducing agent used in this step is sodium bisulfite, and the dosage ratio is sodium bisulfite: hexavalent chromium = 4:1, and the reaction time is 30 to 45 minutes;

[0050] 4) Neutralization treatment: After the reduction treatment is completed, the dosing box 7 adds sodium hydroxide to the wastewater, and at the same time, the mixing device I2 and the mixing device II3 cooperate to evenly mix the wastewater and the sodium hydroxide, and adjust the pH of the wastewater to 7-8, so that the trivalent chromium generates Cr(OH)3 precipitation; at the same time, the wastewater is subjected to precipitation treatment and concentration treatment by the concentrator 4;

[0051] The chromium-containing industrial wastewater treatment device in step 2) comprises a treatment box 1, a mixing device I2, a mixing device II3, and a concentrating device 4; the water inlet pipe I101 on the top of the treatment box 1 is fixedly connected to the dosing box 7, a pair of opposite side walls of the treatment box 1 are symmetrically provided with connecting grooves 103 and slide grooves 105, and another pair of opposite side walls are symmetrically provided with inspection doors 104, and the drain pipe 102 is located below an inspection door 104 and is fixedly connected to the treatment box 1; the support frame 6 supports and fixes the treatment box 1 on the ground, and the spiral discharger 5 is fixedly connected to the discharge port at the bottom of the treatment box 1; the mixing device I2 is fixedly connected to the top of the treatment box 1; the mixing device II3 is provided with two groups, which are respectively located on both sides of the mixing device I2 and are fixedly connected to the connecting groove 103 and the inner wall of the treatment box 1; the concentrating device 4 is located below the mixing device II3 and is connected to the treatment box 1;

[0052] The mixing device I2 comprises a lead screw I201, a guide groove I202, a guide groove II203, a guide rod I204, a sliding seat 205, a rotating seat 206, an extrusion block 207, a blade 208, and a spoiler I209; the guide groove I202 and the guide groove II203 are symmetrically fixedly connected to the top of the processing box 1, a plurality of gear teeth are arranged below the guide groove I202, and the guide rod I204 is located inside the guide groove II203 and is fixedly connected to the processing box 1; the lead screw I201 is arranged inside the guide groove I202, one end of the lead screw I201 is rotatably connected to the processing box 1, and the other end passes through the through hole on the processing box 1 and is fixedly connected to the output end of the motor I2011, and the motor I2011 is connected to the processing box 1 through the motor seat. The sliding seat 205 is slidably connected with the guide groove Ⅰ202 and the guide groove Ⅱ203, and a limiting column 2051 with a sliding groove on the outside is fixedly connected to the bottom of the sliding seat 205, and one end of the sliding seat 205 is threadedly connected with the lead screw Ⅰ201, and the other end is slidably connected with the guide rod Ⅰ204; the rotating seat 206 is rotatably connected to the outside of the limiting column 2051, and a plurality of limiting grooves 2061 are provided on the side wall of the rotating seat 206, and a connecting plate 2062 is provided at the bottom, and the gear at the top of the rotating seat 206 is meshed with the gear teeth on the guide groove Ⅰ202; the extrusion block 207 is provided with a plurality of limiting grooves 2061 ... a plurality of limiting grooves 2061 are provided on the side wall of the rotating seat 206, and a connecting plate 2062 is provided at the bottom, and a gear at the top of the rotating seat 206 is meshed with a gear tooth on the guide groove Ⅰ202; the extrusion block 207 is provided with a plurality of limiting grooves 2061, and a connecting plate 2062 is provided at the bottom, and a plurality of limiting grooves 2061 are provided on the side wall of the rotating seat 206, and a connecting plate 2062 is provided at the bottom, and a plurality of limiting grooves 2061 are provided on the side wall of the rotating seat 206, and a connecting plate 2062 is The through holes on the movable seat 206 and the connecting plate 2062 are fixedly connected to the lever 2072 with a plurality of protrusions on the outside, and the spring I 2071 is arranged on the outside of the extrusion block 207; the blades 208 are provided with a plurality of pairs, which are respectively located between adjacent extrusion blocks 207 and fixedly connected to the connecting plate 2062, and a plurality of pairs of blades 208 are symmetrically provided with a plurality of connecting blocks 2081; the spoiler I 209 is provided with a plurality of spoilers, the spoiler I 209 is rotatably connected to the blades 208 and the connecting blocks 2081 through a connecting shaft, the connecting shaft on the spoiler I 209 passes through a through hole on a blade 208 and is fixedly connected to the shift block 2091 arranged on one side of the lever 2072, and a pair of torsion springs 2092 with opposite opening directions are arranged along the spoiler I 20 The connecting shaft on 9 is arranged between the blade 208 and the connecting block 2081; the motor Ⅰ2011 controls the screw Ⅰ201 to drive the sliding seat 205 to slide along the guide rod Ⅰ204, and at the same time, the gear on the rotating seat 206 is engaged with the gear teeth on the guide groove Ⅰ202 to drive the blade 208 to rotate, so that the wastewater and the reagent on both sides of the treatment box 1 are quickly mixed; at the same time, the limit groove 2061 and the spring Ⅰ2071 cooperate to control the extrusion block 207 to slide along the slide groove on the limit column 2051, so that the lever 2072 is lifted and lowered to move the lever block 2091. Under the action of the torsion spring 2092, the spoiler Ⅰ209 swings up and down to perform up and down disturbance mixing on the wastewater and the reagent, further realizing a full chemical reaction between the reagent and the wastewater, and realizing rapid precipitation separation.

[0053] The mixing device II3 includes a power mechanism 301, a guide ring 302, a water storage box 303, a connector 304, a water outlet cylinder 305, a baffle 306, a sliding groove II 307, and an electric push cylinder I 308; the power mechanism 301 is provided with two groups, which are respectively arranged on both sides of the connecting groove 103, and one side of a plurality of guide rings 302 is connected to the power mechanism 301; the water storage box 303 is provided with a pair, which are symmetrically fixedly connected to both sides of the processing box 1, and the water storage box 303 is fixedly connected to the connector 304 through the water inlet pipe II 3031 at the bottom, and is fixedly connected to the connecting cylinder 3033 at the top through the water outlet pipe 3032 with the connector 304 fixed in the middle; one side of the sliding groove II 307 is fixedly connected to the processing box 1, and both ends are fixedly connected to a pair of water storage boxes 303; the water outlet cylinder 305 is provided with a plurality of spiral blades Ⅰ3051 fixedly connected inside the water outlet cylinder 305, and one end of a pair of connecting pipes 3052 is rotatably connected to the two sides of the connecting cylinder 3033 respectively, and the other end passes through the connecting ring on the other side of the guide ring 302 and is fixedly connected to the water outlet cylinder 305; the baffle 306 is L-shaped, and one side of the baffle 306 is fixedly connected to the processing box 1, the water storage box 303 and the sliding groove Ⅱ307, and a sliding groove Ⅰ3061 is provided at the bottom; the cylinder body of the electric push cylinder Ⅰ308 is located on one side of the sliding groove Ⅱ307 and is fixedly connected to the processing box 1, and the extended end of the electric push cylinder Ⅰ308 is fixedly connected to the connecting seat Ⅰ3081 with connecting rods 3082 fixedly connected at both ends through a connecting plate, and the connecting rod 3082 passes through the through hole on the water storage box 303 and is fixedly connected to the sealing block 3083;

[0054] The electric push cylinder Ⅰ 308 telescopically controls the connection seat Ⅰ 3081 to cooperate with the connecting rod 3082 to drive the sealing block 3083 to slide back and forth in the water storage box 303, so that the pressure in the water storage box 303 changes; when the sealing block 3083 is away from the water inlet pipe Ⅱ 3031, the water storage box 303 is in a negative pressure state. At this time, the connector 304 on the water inlet pipe Ⅱ 3031 is connected, and the connector 304 on the water outlet pipe 3032 is closed, so that the waste water enters the water storage box 303 through the water inlet pipe Ⅱ 3031; when the sealing block 3083 is close to the water inlet pipe Ⅱ 3031, the pressure in the water storage box 303 increases. At this time, the connector 304 on the water outlet pipe 3032 is connected, and the connector 304 on the water inlet pipe Ⅱ 3031 is closed, so that the waste water passes through the outlet pipe 3031. The water pipe 3032 and the connecting pipe 3052 are sprayed toward the mixing device Ⅰ2 through the water outlet cylinder 305, so that the wastewater in the upper and lower layers of the treatment box 1 circulates, disturbing the flow direction of the wastewater in the treatment box 1 on a large scale, and improving the mixing efficiency of the agent and the wastewater; at the same time, the power mechanism 301 and the guide ring 302 cooperate to control the connecting pipe 3052 to drive the water outlet cylinder 305 to swing up and down, so that the agent and the wastewater are quickly mixed evenly; and the spiral blade Ⅰ3051 changes the flow direction of the wastewater sprayed out of the water outlet cylinder 305, and assists the water outlet cylinder 305 to perform turbulent mixing of the wastewater and the agent.

[0055] The power mechanism 301 is provided with a connecting rod I 3011, a connecting rod II 3012, a roller 3013, and a motor II 3014; the connecting rod I 3011 and the connecting rod II 3012 are each provided with a pair, one end of a pair of connecting rods I 3011 passes through the through holes on the processing box 1 and is fixedly connected to a pair of gears meshed together, one end of a pair of connecting rods II 3012 passes through the through holes on the processing box 1 and is fixedly connected to another pair of gears meshed together, and the other ends of the connecting rods I 3011 and the connecting rods II 3012 are rotatably connected to the connecting seat on the inner side of the connecting groove 103; the roller 3013 is provided with a plurality of, respectively Symmetrically fixedly connected to connecting rod I 3011 and connecting rod II 3012; a pair of motors II 3014 are provided, which are fixedly connected to one side of the processing box 1 through a motor seat, and the output ends of the pair of motors II 3014 are respectively fixedly connected to the gears on a connecting rod I 3011 and a connecting rod II 3012; the motor II 3014 is controlled to rotate forward or reverse, so that the connecting rods I 3011 and II 3012 cooperate to drive the roller 3013 to clamp the guide ring 302 and drive the water outlet cylinder 305 to rotate upward or downward with the connection point of the connecting pipe 3052 and the connecting cylinder 3033 as the origin, thereby swinging up and down.

[0056] The connector 304 is provided with a shell 3041, a guide shaft 3042, a spring II 3043, and a sealing sheet 3044; through holes are provided on the top and bottom of the shell 3041, and the bottoms of the guide shafts 3042 are fixedly connected to the shell 3041; the sealing sheet 3044 is slidably connected to the guide shaft 3042, and the spring II 3043 is arranged above the sealing sheet 3044 along the guide shaft 3042; when the water storage box 303 is in a negative pressure state, the wastewater in the treatment box 1 pushes up the sealing sheet 3044 from bottom to top to squeeze the spring II 3043, so that the connector 304 on the water inlet pipe II 3031 is in a connected state; when the pressure in the water storage box 303 increases, the wastewater in the water storage box 303 pushes the sealing sheet 3044 from top to bottom, and at the same time the spring II 3043 is reset, so that the connector 304 is in a closed state, thereby realizing the one-way flow of wastewater in the mixing device II 3.

[0057] The concentrating device 4 comprises a collecting tank 401, a sliding plate 402, a sealing cover 403, an electric push cylinder 404, a rotating plate I 405, a spoiler mechanism 406, a cleaning mechanism 407, a discharge port 408, a shielding mechanism 409, and a motor V 410; the sliding plate 402 is provided with a pair, the sliding plate 402 is slidably connected to the slide groove 105, the connecting box I 4021 is fixedly connected to the outer side of the sliding plate 402, and the cylinder body of the electric push cylinder II 4022 is fixed by a connecting seat The electric push cylinder 404 is fixedly connected above the connection box Ⅰ4021, and the extended end of the electric push cylinder Ⅱ4022 passes through the through hole on the connection box Ⅰ4021 and is fixedly connected to the sealing cover 403; the two ends of the collecting tank 401 are fixedly connected to the sliding plate 402; the electric push cylinder 404 is arranged on both sides of the connection box Ⅰ4021, and the cylinder body of the electric push cylinder 404 is fixedly connected to the processing box 1 through the connection seat, and the extended end of the electric push cylinder 404 is fixedly connected to the connection seat on the connection box Ⅰ4021; the rotating plate Ⅰ405 is rotatably connected to the baffle 306 through a connecting shaft, the connecting shaft on the rotating plate Ⅰ405 passes through the through hole on the processing box 1 and is fixedly connected to the output end of the motor Ⅲ4051, and the motor Ⅲ4051 is fixedly connected to the processing box 1 through a motor seat; the discharge port 408 is fixedly connected to a connection box Ⅰ4021 on a sliding plate 402, and the spiral blade Ⅱ4082 arranged in the collection tank 401 passes through the through hole on the discharge port 408 through the connecting shaft and is fixedly connected to the output end of the motor Ⅳ4081, and the motor Ⅳ4081 is fixedly connected to one side of the discharge port 408 through the motor seat; the spoiler mechanism 406 is provided with two groups, and the two groups of spoiler mechanisms 406 are symmetrically fixedly connected to both sides of the collecting tank 401, and a cleaning mechanism 407 is provided above the spoiler mechanism 406, and a pair of shielding mechanisms 409 are symmetrically provided below; the motor Ⅴ410 is arranged inside the spoiler mechanism 406, and a bevel gear is provided at the output end of the motor Ⅴ410;

[0058] Motor III 4051 controls rotating plate I 405 to approach sealing cover 403, and wastewater above rotating plate I 405 flows into the bottom of baffle 306 through rotating plate I 405 and flow disturbance mechanism 406, and the wastewater flow rate is adjusted by flow disturbance mechanism 406, so that the sediment produced after the wastewater reacts with the reagent is initially precipitated above flow disturbance mechanism 406, thereby reducing the content of sediment in the wastewater and preventing the sediment from affecting the normal operation of mixing device II 3, and then the wastewater enters mixing device II 3 for circulation; the sediment deposited on flow disturbance mechanism 406 can be scraped into collecting tank 401 through cleaning mechanism 407, and then electric push cylinder II 4022 extends out to control sealing cover 403 to enter collecting tank 401, and seals the sediment in collecting tank 401, and then motor IV 4081 controls spiral blade II 4082 to rotate, and the sediment entering into collecting tank 401 is The sediment is cleared out from the discharge port 408 to prevent the sediment from covering and blocking the spoiler mechanism 406, thereby affecting the subsequent work of the spoiler mechanism 406; then the motor V410 controls the shielding mechanism 409 to unfold and fit the baffle 306, and drives the spoiler mechanism 406 and the shielding mechanism 409 to descend through the electric push cylinder 404 in cooperation with the sliding plate 402 and the collecting tank 401. After the spoiler mechanism 406 and the shielding mechanism 409 descend to the bottom of the baffle 306, the shielding mechanism 409 unfolds outward again to fit the processing box 1, and then the electric push cylinder 404 controls the spoiler mechanism 406 and the shielding mechanism 409 to continue to descend, and concentrates the sediment deposited at the bottom of the processing box 1 to prevent the sediment from being lifted up by the water flow and discharged through the drain pipe 102 together with the supernatant when the drain pipe 102 discharges the supernatant, thereby quickly realizing the solid-liquid separation treatment of the sediment and the supernatant.

[0059] The spoiler mechanism 406 is provided with a connecting box II 4061, a mounting frame 4062, a filter plate 4063, a spoiler II 4064, a spoiler III 4065, a connecting box 4066, a connecting rod III 4067, an electric motor I 4068, and a sprocket 4069; mounting frames 4062 are provided on both sides of the connecting box II 4061, and connecting seats and connecting boxes 4066 are fixed at both ends, and a plurality of filter plates 4063 are fixedly connected to the mounting frame 4062; a pair of spoilers III 4065 are provided, which are symmetrically rotatably connected above the connecting box II 4061 through a connecting axis, and the connecting axis on the spoiler III 4065 passes through the through hole on the connecting box II 4061 and is fixedly connected to the sprocket 4069; the spoiler II 4064 is provided with a plurality of through holes. It is rotatably connected to the top of the mounting frame 4062 through a connecting shaft; a plurality of connecting rods III 4067 are provided, and connecting rods III 4067 are rotatably connected to spoiler III 4065 and spoiler II 4064; a pair of electric motors I 4068 are provided, which are fixedly connected to the inner side of the connecting box II 4061 through a motor seat, and the sprocket on the output end of the electric motor I 4068 is connected to the sprocket 4069 through a chain; the electric motor I 4068 and the sprocket 4069 cooperate to control the swing of the spoiler III 4065, and at the same time, the connecting rod III 4067 and the spoiler III 4065 cooperate to drive the spoiler II 4064 to swing, so as to adjust the inclination angle of the spoiler II 4064 and the spoiler III 4065, adjust the flow rate of the wastewater, and control the sedimentation rate of the sediment in the wastewater.

[0060] The cleaning mechanism 407 is provided with a scraper 4071, a rotating plate II 4072, a screw II 4073, a guide rod II 4074, an electric motor II 4075, a guide rod III 4076, a spring III 4077, and a guide cylinder 4078; one end of the screw II 4073 is rotatably connected to the connecting seat on the connecting box II 4061, and the other end passes through the through hole on the connecting box 4066 and is fixedly connected to the sprocket; the scraper 4071 is threadedly connected to the screw II 4073, and one end is connected to the connecting box 4066. The guide rod II 4074 fixedly connected to the scraper 4071 passes through the through hole on the scraper 4071 and is fixedly connected to the connection seat on the connection box II 4061; the electric motor II 4075 is fixedly connected to the connection box II 4061 through the motor seat, and the sprocket on the output end of the electric motor II 4075 is connected to the sprocket on the lead screw II 4073 through a chain; the rotating plate II 4072 is provided with a plurality of connecting grooves respectively connected to the two ends of the scraper 4071 and the scraper 4071, and fixedly connected to the rotating plate II 4072. The guide rod III 4076 on one side of the movable plate II 4072 is slidably connected to the guide cylinder 4078 fixedly connected to the inner side of the scraper 4071; a plurality of springs III 4077 are provided, and the springs III 4077 are arranged between the scraper 4071 and the rotating plate II 4072 along the guide rod III 4076 and the guide cylinder 4078; the rotating plate II 4072 cooperates with the spoiler II 4064 and the spoiler III 4065 to move under the action of the spring III 4077. When the spoiler mechanism 406 needs to be cleaned, the electric Electric motor I 4068 controls spoiler II 4064 and spoiler III 4065 to rotate to a state perpendicular to mounting frame 4062, spring III 4077 pushes rotating plate II 4072 to reset, and then electric motor II 4075 controls lead screw II 4073 to drive scraper 4071 to slide along guide rod II 4074, scraping the sediment deposited on filter plate 4063 into collecting tank 401, preventing the sediment from covering and clogging filter plate 4063 and affecting the subsequent work of spoiler mechanism 406.

[0061] The shielding mechanism 409 is provided with an extension plate 4091, a connection seat II 4092, a lead screw III 4093, a support rod 4094, and a gear 4095; the extension plate 4091 is arranged below the mounting frame 4062, and the bottom of the extension plate 4091 is slidably connected to the support rod 4094 fixedly connected to the connection box II 4061 through a plurality of connection seats II 4092; the lead screw III 4093 is rotatably connected to the connection box II 4061, and one end of the lead screw III 4093 passes through the through hole on the connection box II 4061. The hole is fixedly connected to the gear, and the other end is threadedly connected to the connecting seat on the extension plate 4091; the gear 4095 is meshed with the gear on the screw III 4093, and the gear 4095 is rotatably connected to the connecting seat on the inner side of the connecting box II 4061 through the connecting shaft, and the connecting shaft on the gear 4095 is meshed with the bevel gear on the output end of the motor V 410 through the bevel gear; the motor V 410 and the gear 4095 cooperate to drive the screw III 4093 to rotate, and control the extension plate 4091 to expand outward along the support rod 4094.

[0062] A chromium-containing industrial wastewater treatment device and its treatment process, the working process is as follows:

[0063] After the wastewater is doped with medicine in the dosing box 7 in the water inlet pipe Ⅰ101, it enters the treatment box 1. Then, the motor Ⅰ2011 in the mixing device Ⅰ2 controls the screw Ⅰ201 to drive the sliding seat 205 to slide along the guide rod Ⅰ204. At the same time, the gear on the rotating seat 206 meshes with the gear teeth on the guide groove Ⅰ202 to drive the blade 208 to rotate, so that the wastewater and the medicine on both sides of the treatment box 1 are quickly mixed; at the same time, the limit groove 2061 and the spring Ⅰ2071 cooperate to control the extrusion block 207 to slide along the slide groove on the limit column 2051, so that the lever 2072 controls the spoiler Ⅰ209 to swing up and down to perform up and down disturbance mixing of the wastewater and the medicine; at the same time, the electric push cylinder Ⅰ308 in the mixing device Ⅱ3 telescopically controls the connecting seat Ⅰ3081 and the connecting rod 3082 to drive the sealing block 3083 in the water storage box 303 The water box 303 slides back and forth in the water storage box 303, so that the wastewater in the lower layer of the treatment box 1 is sprayed to the upper layer of the treatment box 1 through the connecting pipe 3052 and the water outlet cylinder 305 under the cooperation of the water inlet pipe II 3031, the water outlet pipe 3032 and the connecting head 304, so that the wastewater circulates in the treatment box 1; at the same time, the disturbing mechanism 406 in the concentrating device 4 adjusts the flow rate of the wastewater and performs the initial precipitation of the sediment produced after the reaction of the wastewater and the reagent; after the reaction of the wastewater and the reagent is completed, the cleaning mechanism 407 scrapes the sediment deposited on the disturbing mechanism 406 into the collecting tank 401, and the electric push cylinder II 4022 extends to control the sealing cover 4 03 enters the collecting tank 401, seals the sediment in the collecting tank 401, and controls the spiral blade II 4082 to rotate through the motor IV 4081, so that the sediment entering the collecting tank 401 is cleared out from the discharge port 408; then the motor V 410 controls the shielding mechanism 409 to unfold, and drives the spoiler mechanism 406 and the shielding mechanism 409 to descend through the electric push cylinder 404 in cooperation with the sliding plate 402 and the collecting tank 401, so as to concentrate the sediment deposited at the bottom of the processing box 1; after the supernatant is discharged from the processing box 1 through the drain pipe 102, the spiral discharger 5 is controlled to clear the sediment out of the processing box 1.

[0064] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A process for treating chromium-containing industrial wastewater, characterized in that The processing steps are as follows: 1) Concentration adjustment: The wastewater with a low chromium concentration is passed through the temporary storage part of the water tank, and the concentration of hexavalent chromium in the wastewater is monitored in real time through the monitoring device; when the hexavalent chromium concentration in the wastewater exceeds 1000 mg / L, the wastewater in the water tank is passed into the wastewater for dilution, so that the hexavalent chromium concentration in the wastewater is controlled between 100 and 1000 mg / L; 2) PH adjustment: Add sulfuric acid to the wastewater to control the pH value of the wastewater between 2.5 and 3, so that the hexavalent chromium is converted to Cr2O7 2 The wastewater is then sent to a chromium-containing industrial wastewater treatment plant for treatment; 3) Reduction treatment: After the wastewater is added with the reducing agent in the dosing box in the water inlet pipe I, it enters the treatment box. The wastewater and the reducing agent are evenly mixed by the mixing device I and the mixing device II to reduce the hexavalent chromium in the wastewater to trivalent chromium. The reducing agent used in this step is sodium bisulfite, and the dosage ratio is sodium bisulfite: hexavalent chromium = 4:

1. The reaction time is 30 to 45 minutes. 4) Neutralization treatment: After the reduction treatment is completed, the dosing box adds sodium hydroxide to the wastewater, and at the same time, the mixing device I and the mixing device II cooperate to evenly mix the wastewater and sodium hydroxide, and adjust the pH of the wastewater to 7-8, so that the trivalent chromium generates Cr(OH)3 precipitation; at the same time, the wastewater is precipitated and concentrated by the concentration device; The chromium-containing industrial wastewater treatment device in step 2) comprises a treatment box, a mixing device I, a mixing device II, and a concentrating device; the water inlet pipe I on the top of the treatment box is fixedly connected to the dosing box, a pair of opposite side walls of the treatment box are symmetrically provided with connecting grooves and slide grooves, and another pair of opposite side walls are symmetrically provided with inspection doors, and the drain pipe is located below one inspection door and fixedly connected to the treatment box; the support frame supports and fixes the treatment box on the ground, and the spiral discharger is fixedly connected to the discharge port at the bottom of the treatment box; the mixing device I is fixedly connected to the top of the treatment box; the mixing device II is provided with two groups, which are respectively located on both sides of the mixing device I and fixedly connected to the connecting groove and the inner wall of the treatment box; the concentrating device is located below the mixing device II and connected to the treatment box; The mixing device I comprises a screw I, a guide groove I, a guide groove II, a guide rod I, a sliding seat, a rotating seat, an extrusion block, blades, and a spoiler I; the guide groove I and the guide groove II are symmetrically fixedly connected to the top of the processing box, a plurality of gear teeth are arranged below the guide groove I, and the guide rod I is located inside the guide groove II and is fixedly connected to the processing box; the screw I is arranged inside the guide groove I, one end of the screw I is rotatably connected to the processing box, and the other end passes through the through hole on the processing box and is fixedly connected to the output end of the motor I, and the motor I is fixedly connected to the processing box through the motor seat; the sliding seat is slidably connected to the guide groove I and the guide groove II, a limiting column with a sliding groove on the outside is fixedly connected to the bottom of the sliding seat, and one end of the sliding seat is threadedly connected to the screw I, and the other end is slidably connected to the guide rod I; the rotating seat is rotatably connected to the outside of the limiting column, and the side wall of the rotating seat A plurality of limit grooves are provided on the top, a connecting plate is provided at the bottom, and the gear on the top of the rotating seat is meshed with the gear teeth on the guide groove I; the extrusion blocks are provided with a plurality of blocks, one side of the extrusion blocks passes through the rotating seat through the limit block and is slidably connected to the slide groove on the limit column, the bottom passes through the through holes on the rotating seat and the connecting plate and is fixedly connected to the lever with a plurality of protrusions on the outside, and the spring I is provided on the outside of the extrusion block; the blades are provided with a plurality of pairs, which are respectively located between adjacent extrusion blocks and fixedly connected to the connecting plates, and a plurality of pairs of blades are symmetrically provided with a plurality of connecting blocks; the spoiler I is provided with a plurality of blocks, the spoiler I is rotatably connected to the blades and the connecting block through a connecting shaft, the connecting shaft on the spoiler I passes through a through hole on a blade and is fixedly connected to the shift block provided on one side of the shift rod, and a pair of torsion springs with opposite opening directions are provided between the blades and the connecting block along the connecting shaft on the spoiler I; The mixing device II includes a power mechanism, a guide ring, a water storage box, a connector, a water outlet cylinder, a baffle, a sliding groove II, and an electric push cylinder I; the power mechanism is provided with two groups, which are respectively arranged on both sides of the connecting groove, and one side of the guide rings is connected to the power mechanism; the water storage box is provided with a pair, which are symmetrically fixedly connected to both sides of the processing box, and the water storage box is fixedly connected to the connector through the water inlet pipe II at the bottom, and is fixedly connected to the connecting cylinder through the water outlet pipe with the connector fixed in the middle at the top; one side of the sliding groove II is fixedly connected to the processing box, and both ends are fixedly connected to a pair of water storage boxes; the water outlet The cylinder is provided with a plurality of spiral blades I fixedly connected inside the water outlet cylinder, and one end of a pair of connecting pipes is respectively rotatably connected to the two sides of the connecting cylinder, and the other end passes through the connecting ring on the other side of the guide ring and is fixedly connected to the water outlet cylinder; the baffle is L-shaped, and one side of the baffle is fixedly connected to the processing box, the water storage box and the sliding groove II, and a sliding groove I is provided at the bottom; the cylinder body of the electric push cylinder I is located on one side of the sliding groove II and is fixedly connected to the processing box, and the extended end of the electric push cylinder I is fixedly connected to the connecting seat I with connecting rods fixedly connected at both ends through the connecting plate, and the connecting rod passes through the through hole on the water storage box and is fixedly connected to the sealing block; The concentrating device comprises a collecting trough, a sliding plate, a sealing cover, an electric push cylinder, a rotating plate I, a spoiler mechanism, a cleaning mechanism, a discharge port, a shielding mechanism, and a motor V; a pair of sliding plates are provided, the sliding plates are slidably connected to the sliding trough, a connecting box I is fixedly connected to the outside of the sliding plate, the cylinder body of the electric push cylinder II is fixedly connected to the top of the connecting box I through a connecting seat, and the extended end of the electric push cylinder II passes through the through hole on the connecting box I and is fixedly connected to the sealing cover; both ends of the collecting trough are fixedly connected to the sliding plate; the electric push cylinder is provided on both sides of the connecting box I, and the cylinder body of the electric push cylinder is fixedly connected to the processing box through a connecting seat, and the extended end of the electric push cylinder is fixedly connected to the connecting seat on the connecting box I; the rotating plate I is connected by a shaft It is rotatably connected to the baffle, and the connecting shaft on the rotating plate I passes through the through hole on the processing box and is fixedly connected to the output end of the motor III, and the motor III is fixedly connected to the processing box through a motor seat; the discharge port is fixedly connected to a connecting box I on a sliding plate, and the spiral blade II arranged in the collecting tank passes through the through hole on the discharge port and is fixedly connected to the output end of the motor IV through the connecting shaft, and the motor IV is fixedly connected to one side of the discharge port through the motor seat; the spoiler mechanism is provided with two groups, and the two groups of spoiler mechanisms are symmetrically fixedly connected on both sides of the collecting tank, and a cleaning mechanism is provided above the spoiler mechanism, and a pair of shielding mechanisms are symmetrically provided below; the motor V is arranged inside the spoiler mechanism, and a bevel gear is provided at the output end of the motor V.

2. A chromium-containing industrial wastewater treatment device according to claim 1, characterized in that The power mechanism is provided with a connecting rod I, a connecting rod II, a roller, and a motor II; the connecting rod I and the connecting rod II are each provided with a pair, one end of a pair of connecting rods I passes through the through holes on the processing box and is fixedly connected to a pair of gears meshing together, one end of a pair of connecting rods II passes through the through holes on the processing box and is fixedly connected to another pair of gears meshing together, and the other ends of the connecting rods I and II are rotatably connected to the connecting seat on the inner side of the connecting groove; a plurality of rollers are provided, which are symmetrically fixedly connected to the connecting rod I and the connecting rod II respectively; a pair of motors II are provided, which are fixedly connected to one side of the processing box through a motor seat, and the output ends of the pair of motors II are fixedly connected to the gears on a connecting rod I and a connecting rod II respectively.

3. A chromium-containing industrial wastewater treatment device according to claim 1, characterized in that The connector is provided with a shell, a guide shaft, a spring II, and a sealing sheet; through holes are provided at the top and bottom of the shell, and the bottoms of several guide shafts are fixedly connected to the shell; the sealing sheet is slidably connected to the guide shaft, and the spring II is arranged above the sealing sheet along the guide shaft.

4. A chromium-containing industrial wastewater treatment device according to claim 1, characterized in that The spoiler mechanism is provided with a connecting box II, a mounting frame, a filter plate, a spoiler II, a spoiler III, a connecting box, a connecting rod III, an electric motor I, and a sprocket; mounting frames are provided on both sides of the connecting box II, and connecting seats and connecting boxes are respectively fixed at both ends, and a number of filter plates are fixedly connected to the mounting frames; a pair of spoilers III are provided, which are symmetrically connected to the top of the connecting box II through a connecting axis, and the connecting shaft on the spoiler III passes through the through hole on the connecting box II and is fixedly connected to the sprocket; a number of spoilers II are provided, which are rotationally connected to the top of the mounting frame through a connecting shaft; a number of connecting rods III are provided, and the connecting rod III is rotationally connected to the spoiler III and the spoiler II; a pair of electric motors I are provided, which are fixedly connected to the inner side of the connecting box II through a motor seat, and the sprocket on the output end of the electric motor I is connected to the sprocket through a chain.

5. The chromium-containing industrial wastewater treatment device according to claim 1, characterized in that The cleaning mechanism is provided with a scraper, a rotating plate II, a lead screw II, a guide rod II, an electric motor II, a guide rod III, a spring III, and a guide cylinder; one end of the lead screw II is rotatably connected to the connecting seat on the connecting box II, and the other end passes through the through hole on the connecting box and is fixedly connected to the sprocket; the scraper is threadedly connected to the lead screw II, and the guide rod II at one end fixedly connected to the connecting box passes through the through hole on the scraper and is fixedly connected to the connecting seat on the connecting box II; the electric motor II is fixedly connected in the connecting box II through the motor seat, and the sprocket on the output end of the electric motor II is connected to the sprocket on the lead screw II through a chain; the rotating plate II is provided with a plurality of guide rods III, which are rotatably connected to the two ends of the scraper and the connecting grooves on the scraper, respectively, and the guide rods III fixedly connected to one side of the rotating plate II are slidably connected to the guide cylinder fixedly connected to the inner side of the scraper; a plurality of springs III are provided, and the springs III are arranged between the scraper and the rotating plate II along the guide rods III and the guide cylinder.

6. A chromium-containing industrial wastewater treatment device according to claim 1, characterized in that The shielding mechanism is provided with an extension plate, a connecting seat II, a lead screw III, a support rod and a gear; the extension plate is arranged below the mounting frame, and the bottom of the extension plate is slidably connected to the support rod fixedly connected to the connecting box II through a plurality of connecting seats II; the lead screw III is rotatably connected to the connecting box II, and one end of the lead screw III passes through a through hole on the connecting box II and is fixedly connected to the gear, and the other end is threadedly connected to the connecting seat on the extension plate; the gear is meshed with the gear on the lead screw III, and the gear is rotatably connected to the connecting seat on the inner side of the connecting box II through a connecting shaft, and the connecting shaft on the gear is meshed with the bevel gear on the output end of the motor V through a bevel gear.

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