A cooling wastewater treatment system for an iron powder reduction furnace and a method for using the same

Abstract

The invention relates to an iron powder reduction furnace cooling wastewater treatment system and a method for using the system, comprising a sedimentation tank, a flocculation mechanism and a filtering mechanism, wherein the flocculation mechanism comprises a flocculation box and a stirring shaft vertically connected to the flocculation box, a stirring paddle is fixedly connected to the stirring shaft, the side of the sedimentation tank is connected to the flocculation box through a connecting pipe, a flow sensor is installed on the connecting pipe, a flocculant powder box is fixedly connected to the upper end of the flocculation box, a discharge pipe is connected to the side of the flocculant powder box, a spiral conveying paddle is connected to the inner shaft of the discharge pipe, and the spiral conveying paddle is connected to the stirring shaft through a gear transmission assembly. The invention precipitates wastewater through a sedimentation tank, and adds flocculant in the flocculation box to condense dirt in the wastewater into large flocs, the adding speed of the flocculant and the stirring speed of the wastewater are automatically adjusted with the flow rate of the wastewater, the whole is completed through automatic control, the structure is simple and miniaturized, a large number of treatment equipment in the prior art are omitted, and the cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of wastewater treatment, and in particular to an iron powder reduction furnace cooling wastewater treatment system and a use method thereof. Background Art

[0002] In the process of iron powder processing, it is necessary to reduce the iron oxide in the reduction furnace. The reduction process is carried out in the reduction furnace, and the iron oxide in the reduction furnace is reduced by hydrogen. Since the temperature is very high during the combustion process, in order to prevent equipment damage, the equipment needs to be cooled by water cooling. After cooling the reduction furnace, the cooling water is usually discharged into the total cooling pool of the plant for subsequent secondary utilization.

[0003] However, during the cooling process of the reduction furnace cooling water, a large amount of iron powder, sintering slag, scale and other impurities are mixed inside. Once these impurities enter the cooling pool, they will cause certain damage to other water-using equipment, and it is also easy to cause pipe blockage, affecting the normal cooling process.

[0004] The current wastewater treatment system usually first precipitates the wastewater through a flocculant, and then sends the precipitate to a filter press for treatment. The overall equipment cost is high. Since the treatment volume of the reduction furnace cooling water is relatively small, it is too wasteful to introduce existing wastewater treatment equipment. It is necessary to design a wastewater treatment system to filter and treat the reduction furnace cooling wastewater. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an iron powder reduction furnace cooling wastewater treatment system and a use method thereof.

[0006] The present invention is achieved through the following technical scheme, which provides an iron powder reduction furnace cooling wastewater treatment system, including a sedimentation tank, a flocculation mechanism and a filtering mechanism arranged in sequence, the flocculation mechanism including a flocculation box, a stirring shaft vertically connected to the flocculation box, and a stirring motor driving the stirring shaft to rotate, a stirring paddle is fixedly connected to the stirring shaft, the side of the sedimentation tank is connected to the flocculation box through a connecting pipe, a flow sensor is installed on the connecting pipe, a flocculant powder box is fixedly connected to the upper end of the flocculation box, a discharge pipe is connected to the side of the flocculant powder box, a spiral conveying paddle is connected to the inner shaft of the discharge pipe, the spiral conveying paddle is connected to the stirring shaft through a gear transmission assembly, a plurality of powder outlets are opened at the lower end of the discharge pipe, and the lower end of the flocculation box is connected to the filtering mechanism through a filter inlet pipe.

[0007] As an optimization, an electric control valve is installed on the filter inlet pipe.

[0008] As an optimization, the gear transmission assembly includes a passive bevel gear fixedly connected to one end of the screw conveyor shaft and an active bevel gear fixedly connected to the stirring shaft.

[0009] As an optimization, the filtering mechanism includes a processing box and a debris collection box located on both sides of the processing box, and the two inner walls of the processing box close to the debris collection box are both equipped with unilateral filtering components, a water inlet located between the two unilateral filtering components is arranged above the processing box, the water inlet is arranged at the end of the filter inlet pipe, and a water outlet is arranged at the bottom of the processing box, the unilateral filtering component includes a lifting seat vertically slidably connected to the inner wall of the processing box, a lifting driving mechanism for driving the lifting seat to lift and lower, and a support rod hinged on the lifting seat, a filter screen plate is arranged on the support rod, a driving cylinder is connected between the support rod and the lifting seat, and the driving cylinder drives the support rod to swing up and down to make the filter screen plate swing between a horizontal state and a vertical state above; when the filter screen plates of the two unilateral filtering components are both in a horizontal state, they partially overlap and the overlapping part is located below the water inlet; and also includes an injection device located above the processing box, when the filter screen plate is in a vertical state and located above the processing box, the filtered debris on the filter screen plate is blown to the debris collection box through the injection device.

[0010] As an optimization, the jet device includes a fixed frame, a vertical tube with a vertical axis connected to the frame, and a jet drive mechanism for driving the vertical tube to rotate. The lower end of the vertical tube is connected to a transverse tube, and a nozzle is provided on the transverse tube.

[0011] As an optimization, the jet drive mechanism includes a rotating motor and a passive gear fixed to the vertical tube, and the rotating motor is provided with a driving gear meshing with the passive gear.

[0012] As an optimization, the upper end of the vertical pipe is connected to the air supply pipe via a rotary joint.

[0013] As an optimization, the nozzle is a vertical flat nozzle.

[0014] As an optimization, the filter screen plate is circular and its center is rotatably connected to the support rod via a vertical rotating shaft. A plurality of circumferentially arranged guide vanes are fixed to the upper end surface of the filter screen plate. The guide vanes extend radially along the filter screen plate, and the angle between the guide vanes and the filter screen plate is 60-80 degrees.

[0015] As an optimization, a feed inlet located above the processing box is provided on the opposite side of the two debris collection boxes, and when the jet device blows air to the filter screen plate, the filter screen plate is located at the feed inlet.

[0016] As an optimization, the lifting drive mechanism includes a vertical lead screw and a lifting motor located on the side of the lead screw, the lifting motor drives the lead screw to rotate through a belt transmission assembly, and the nut of the lead screw is fixedly connected to the lifting seat.

[0017] A method for using an iron powder reduction furnace cooling wastewater treatment system comprises the following steps:

[0018] a. After the wastewater settles in the sedimentation tank, the supernatant enters the flocculation tank through the connecting pipe;

[0019] b. The stirring motor drives the stirring shaft to rotate, and drives the screw conveying paddle in the discharge pipe to rotate through the gear transmission assembly. The screw conveying paddle drives the flocculant powder in the flocculant powder box to enter the discharge pipe, and falls from the powder outlet at the lower end into the wastewater in the flocculation box. The stirring paddle stirs and mixes the wastewater, so that the wastewater condenses into large flocs, and enters the filter mechanism through the filter inlet pipe at the lower end;

[0020] c. When the filter mechanism is working, one of the filter screens is horizontally located at the upper part of the treatment box, and the other filter screen is vertically attached to the side of the treatment box. Wastewater flows out from the water inlet, flows through the horizontal filter screen, flows downward to the treatment box after being filtered, and finally flows out from the water outlet;

[0021] d. When the wastewater flows through the horizontal filter screen, the guide plate drives the filter screen to rotate, and the wastewater is filtered at various positions around the filter screen;

[0022] e. When the filter screen plate in a horizontal state needs to be cleaned, the filter screen plate attached to the side of the treatment box is swung to a horizontal state and moved upward through the lifting seat until it reaches the top to filter the wastewater. The filter screen plate originally in a horizontal state is swung upward to a vertical state and is located above the treatment box;

[0023] f. The vertical pipe in the jet device rotates so that the nozzle at the end of the horizontal pipe faces the filter screen above the processing box, and the high-pressure gas blows the debris on the filter screen to the debris collection box;

[0024] g. When high-pressure gas blows toward the filter screen, the filter screen is driven to rotate through the guide plate, so that air is blown at various positions around the filter screen;

[0025] h. The filter screen plate after blowing is moved downward through the lifting seat and fits on the side of the processing box.

[0026] The beneficial effects of the present invention are as follows: an iron powder reduction furnace cooling wastewater treatment system and a method of using the same, the wastewater is precipitated in a sedimentation tank, and a flocculant is added in a subsequent flocculation box to condense the dirt in the wastewater into large flocs, which enter a filtering mechanism for filtration, the flocculant addition speed and the wastewater stirring speed are automatically adjusted with the wastewater flow rate, so that the flocculant is automatically added according to the wastewater volume, two filter screens are arranged in the filtering mechanism to work alternately to achieve uninterrupted filtration, and at the same time, the debris after filtration can be removed to ensure a good filtration effect, the whole is completed through automatic control, the structure is simple and miniaturized, a large number of processing equipment in the prior art are omitted, and the cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the present invention;

[0028] Figure 2 It is a structural schematic diagram of another angle of the present invention;

[0029] Figure 3 It is a front view of the present invention;

[0030] Figure 4 A top view of the present invention;

[0031] Figure 5 It is a schematic diagram of the flocculation mechanism structure of the present invention;

[0032] Figure 6 It is the internal schematic diagram of the flocculation mechanism of the present invention;

[0033] Figure 7 The figure is a schematic diagram of the installation of the stirring shaft and the stirring paddle of the present invention;

[0034] Figure 8 This is a schematic diagram of the interior of the flocculant powder box of the present invention;

[0035] Fig. 9 It is a schematic diagram of the structure of the filtering mechanism of the present invention;

[0036] Fig.10 It is a front view of the interior of the filter mechanism without the debris collection box of the present invention;

[0037] Fig.11 A top view of the filter mechanism of the present invention without a debris collection box;

[0038] Fig.12 It is a schematic diagram of the structure of the filtering mechanism without a debris collection box of the present invention;

[0039] Fig.13 For the present invention Fig.12 A magnified view of part A;

[0040] Fig.14 It is a structural schematic diagram of a horizontal state of a unilateral filtering assembly of the present invention;

[0041] Fig.15 Another structural schematic diagram of the unilateral filter assembly of the present invention in a horizontal state from another angle;

[0042] Fig.16 It is a structural schematic diagram of a unilateral filter assembly in a vertical state of the present invention;

[0043] Fig.17 It is a structural schematic diagram of the debris collection box of the present invention;

[0044] Fig.18 It is a structural schematic diagram of the jetting device of the present invention;

[0045] Fig.19 It is an internal front view of the filtering mechanism of the present invention in state 1;

[0046] Fig. 20 It is an internal front view of the filtering mechanism of the present invention in state 2;

[0047] Fig.21 It is an internal front view of the filtering mechanism of the present invention in state 3;

[0048] Fig. 22 It is an internal front view of the filtering mechanism of the present invention in state 4;

[0049] Fig.23 It is an internal front view of the filtering mechanism of the present invention in state 5;

[0050] As shown in the figure:

[0051] 1. Sedimentation tank, 2. Flocculation mechanism, 21. Flocculation box, 22. Stirring shaft, 23. Stirring paddle, 24. Support frame, 25. Flocculant powder box, 26. Discharge pipe, 27. Screw conveyor paddle, 28. Gear transmission assembly, 29. Stirring motor, 3. Filter mechanism, 31. Single-sided filter assembly, 32. Jet device, 33. Treatment box, 34. Water inlet, 35. Water outlet, 36. Debris collection box, 311. Filter screen, 312. Support rod, 313. Lifting seat, 314. driving cylinder, 315. slide rail, 316. slider, 317. lifting motor, 318. lead screw, 319. belt drive assembly, 310. guide vane, 321. fixing frame, 322. vertical pipe, 323. horizontal pipe, 324. rotating joint, 325. air supply pipe, 326. driving gear, 327. driven gear, 328. rotating motor, 4. waste water pipe, 5. connecting pipe, 6. filter inlet pipe, 7. electric control valve, 8. clean water pipe, 9. flow sensor. DETAILED DESCRIPTION

[0052] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0053] like Figure 1-Figure 23 As shown, a wastewater treatment system for cooling an iron powder reduction furnace of the present invention comprises a sedimentation tank 1, a flocculation mechanism 2 and a filtering mechanism 3 arranged in sequence, and a wastewater pipe 4 discharges wastewater into the sedimentation tank 1 for sedimentation.

[0054] like Figure 5-Figure 8As shown, the flocculation mechanism 2 includes a flocculation box 21, a stirring shaft 22 whose vertical axis is connected to the flocculation box 21, and a stirring motor 29 for driving the stirring shaft 22 to rotate. The upper end of the flocculation box 21 is flush with the upper end of the sedimentation tank 1, and the flocculation box 21 is supported by columns below, so that its lower end surface is higher than the subsequent filtering mechanism 3, so that the wastewater treated with the flocculant can enter the filtering mechanism 3.

[0055] The lower end of the flocculation box 21 is connected to the filter mechanism 3 through the filter inlet pipe 6. The filter inlet pipe 6 is equipped with an electric control valve 7, which can realize automatic control of the switch.

[0056] The flocculation box 21 is a cylindrical box. Figure 7 As shown, the stirring shaft 22 is supported by two support frames 24 fixed in the flocculation box 21. The support frame 24 includes a central bearing seat and four connecting rods fixedly connected to the circumference of the bearing seat. The stirring shaft 22 is axially connected in the bearing seat, and the bearing seat is fixedly connected to the flocculation box through four connecting rods.

[0057] like Figure 7 As shown, a stirring paddle 23 is fixedly connected to the stirring shaft 22, and a plurality of stirring paddles 23 are provided to achieve stirring at multiple positions. A stirring motor 29 is fixed on the outside of the flocculation box 21, and drives the stirring shaft 22 to rotate through a belt drive. The stirring motor 29 is a variable frequency motor, and the speed can be adjusted according to the flow rate of the wastewater entering.

[0058] The side of the sedimentation tank 1 is connected to the flocculation box 21 through a connecting pipe 5. The connecting pipe 5 is located near the upper end, so that the clear liquid at the upper end of the sedimentation tank flows into the flocculation box 21. The connecting pipe 5 is equipped with a flow sensor 9 to detect the flow of wastewater entering the flocculation box 21, so as to facilitate real-time adjustment of the addition speed and stirring speed of the flocculant powder.

[0059] like Figure 5 , Figure 6 , Figure 8 As shown, a flocculant powder box 25 is fixedly connected to the upper end of the flocculation box 21, and flocculant powder is contained in the flocculant powder box 25.

[0060] The side of the flocculant powder box 25 is connected with a discharge pipe 26 , which is horizontally arranged, with one end connected to the flocculant powder box 25 and the other end closed.

[0061] like Figure 8 As shown, the inner shaft of the discharge pipe 26 is connected to a screw conveying paddle 27, and the rotating shaft of the screw conveying paddle 27 passes through the closed end of the discharge pipe 26. Figure 6 As shown, the screw conveying paddle 27 is connected to the stirring shaft 22 through a gear transmission assembly 28 , and the gear transmission assembly 28 includes a passive bevel gear fixed to one end of the rotating shaft of the screw conveying paddle 27 and an active bevel gear fixed to the stirring shaft 22 .

[0062] The flow sensor 9 on the connecting pipe 5 is used to detect the wastewater flow rate. The larger the flow rate, the faster the speed of the stirring motor 29, the faster the stirring speed and the speed of adding flocculant powder. The lower end of the discharge pipe 26 is provided with multiple powder outlets, and the powder falls into the flocculation box 21 through the powder outlets.

[0063] like Figure 9-Figure 23 As shown, the filtering mechanism 3 includes a processing box 33 and debris collection boxes 36 located on both sides of the processing box 33. Fig. 9 and Fig.17 As shown, the debris collection box 36 in this embodiment is a rectangular box with an upper opening, and a water outlet 35 is provided at the bottom of the processing box 33. The water outlet 35 is connected to a clean water pipe 8 for discharging filtered clean water. A manual valve is installed on the clean water pipe 8.

[0064] A debris feed port located above the processing box 33 is provided on the opposite side of the two debris collection boxes 36 for collecting filtered debris. Single-sided filter components 31 are installed on the two inner walls of the processing box 33 close to the debris collection box 36. The debris filtered in the single-sided filter component 31 is cleaned into the debris feed port of the debris collection box 36 on the same side.

[0065] like Fig. 9 and Fig.11 As shown, a water inlet 34 is provided above the treatment box 33 and is located between the two single-sided filter components 31. The water inlet 34 is arranged at the end of the filter inlet pipe 6. The water inlet 34 is located on one side of the line connecting the two single-sided filter components 31. The wastewater flows out horizontally and flows downward in a parabola into the treatment box 33.

[0066] like Figure 11-Figure 16 As shown, the single-sided filtering assembly 31 includes a lifting seat 313 vertically slidably connected to the inner wall of the processing box 33 and a lifting driving mechanism for driving the lifting seat 313 to move up and down.

[0067] Four sliding blocks 316 are fixedly connected to one side of the lifting seat 313 close to the inner wall of the processing box 33 . The four sliding blocks 316 slide vertically on two vertical slide rails 315 , thereby achieving the lifting and lowering guidance of the lifting seat 313 .

[0068] The lifting drive mechanism includes a vertical screw 318 and a lifting motor 317 located on the side of the screw 318. The screw 318 is vertically axially connected to the inner side of the processing box 33, and the upper and lower ends are installed through bearing seats. The upper end of the screw 318 is higher than the upper end of the processing box 33 and is equipped with a pulley. The lifting motor 317 is installed at the upper end of the outer side of the processing box 33, and a pulley is also installed on the rotating shaft. Therefore, the lifting motor 317 drives the screw 318 to rotate through the belt transmission assembly 319, and the nut of the screw 318 is fixedly connected to the lifting seat 313, thereby driving the lifting seat 313 to achieve lifting.

[0069] like Fig.19 As shown, the steel plate at the feed port of the debris collection box 36 protrudes inward to facilitate receiving debris, and the protruding portion is located above the lifting motor 317 and the lead screw 318 to prevent debris from falling on the lifting motor 317 and the lead screw 318.

[0070] The unilateral filter assembly 31 further comprises a support rod 312 hinged on a lifting seat 313, one end of the support rod 312 is horizontally arranged with the lifting seat 313 and the hinge axis, and the other end of the support rod 312 is provided with a filter screen plate 311. The filter screen plate 311 is parallel to the support rod 312.

[0071] like Fig.14 As shown, a driving cylinder 314 is connected between the support rod 312 and the lifting seat 313. One end of the driving cylinder 314 is hinged to the support rod 312, and the other end is hinged to the lifting seat 313. The driving cylinder 314 drives the support rod 312 to swing up and down so that the filter screen plate 311 swings between a horizontal state and an upper vertical state, as shown in FIG. Fig.19 As shown, the filter screen plate 311 on the right is in a horizontal state, and the filter screen plate 311 on the left is swung upward to a vertical state. Since the lifting seat 313 on the left is lowered to the lower end, the filter screen plate 311 on the left is attached to the side of the processing box 33.

[0072] When the filter screen plate 311 needs to be switched, the filter screen plate 311 on the left side swings downward. During the swinging process, since the filter screen plate 311 on the right side is above, there will be no interference. After the filter screen plate 311 on the left side swings to the horizontal, the lifting seat 313 on the left side drives it to rise, so as to receive the waste water flow. In order to ensure that the two filter screen plates 311 can be smoothly transferred, such as Fig.11 As shown, when the filter screens 311 of the two unilateral filter assemblies 31 are in a horizontal state, they partially overlap and the overlapping portion is located below the water inlet 34; the wastewater flows downward in a parabolic shape to the overlapping area, so that any filter screen 311 can achieve filtering in this area.

[0073] like Fig.14 and Fig.15 As shown, the filter screen plate 311 is circular, and a baffle is provided at the edge of the filter screen plate 311 to prevent waste water from flowing out from the edge. The center of the filter screen plate 311 is rotatably connected to the support rod 312 through a vertical shaft, so that it can rotate. Fig.15As shown, a plurality of circumferentially arranged guide plates 310 are fixedly connected to the upper end surface of the filter screen plate 311, and the guide plates 310 extend radially along the filter screen plate 311. The included angle between the guide plates 310 and the filter screen plate 311 is 60-80 degrees. The function of the guide plates 310 is that the wastewater impacts the guide plates 310 from the side, which can realize the rotation of the filter screen plate 311, thereby filtering the sewage through various areas.

[0074] On the other hand, in Figure 21 to Figure 22 During the conversion, the filter plate 311 is flipped upward, so there should be no objects interfering on the flipping path. Therefore, the nozzle of the jet device 32 should not be too large, and only half of the filter plate 311 can be backblown. Therefore, a guide plate 310 is provided. When the debris is backblown from the filter plate 311, due to the inclination of the guide plate 310, the gas drives the filter plate 311 to rotate through the guide plate 310, thereby backblowing the entire filter plate 311 area to achieve effective cleaning.

[0075] It also includes an air jet device 32 located above the processing box 33. When the filter screen plate 311 is in a vertical state and located above the processing box 33, the filtered debris on the filter screen plate 311 is blown to the debris collection box 36 through the air jet device 32. When the air jet device 32 blows air to the filter screen plate 311, the filter screen plate 311 is located at the debris feed port.

[0076] like Fig.18 As shown, the jet device 32 includes a fixed frame 321, a vertical pipe 322 vertically connected to the fixed frame 321, and a jet drive mechanism for driving the vertical pipe 322 to rotate. The lower end of the vertical pipe 322 is connected to a transverse pipe 323, and the transverse pipe 323 and the vertical pipe 322 form an L-shaped structure. The transverse pipe 323 is provided with a nozzle, which is a vertical flat mouth, and the length is consistent with the radius of the filter screen plate 311.

[0077] Because from Figure 21 to Figure 22 During the conversion, the filter screen plate 311 is flipped upward, so there should be no interference on the flipping path. When the filter screen plate 311 is flipped upward, the vertical tube 322 rotates to make the horizontal tube 323 away from the flipping path. After the flipping is completed, the vertical tube 322 rotates to make the nozzle close to the filter screen plate 311 to improve the recoil effect.

[0078] The upper end of the vertical pipe 322 is connected to the air supply pipe 325 through a rotary joint 324, and the air supply pipe 325 is connected to the high-pressure air pump. When in actual use, it can be directly connected to the high-pressure air pipe of the workshop.

[0079] The jet drive mechanism includes a rotary motor 328 and a passive gear 327 fixedly connected to the vertical tube 322 . The rotary motor 328 is provided with a driving gear 326 meshing with the passive gear 327 .

[0080] A method for using an iron powder reduction furnace cooling wastewater treatment system comprises the following steps:

[0081] a. After the wastewater is precipitated in the sedimentation tank 1, the supernatant enters the flocculation tank 21 through the connecting pipe 5;

[0082] b. The stirring motor 29 drives the stirring shaft 22 to rotate, and drives the screw conveying paddle 27 in the discharge pipe 26 to rotate through the gear transmission assembly 28. The screw conveying paddle 27 drives the flocculant powder in the flocculant powder box 25 to enter the discharge pipe 26, and falls from the powder outlet at the lower end into the wastewater in the flocculation box 21. The flow sensor 9 on the connecting pipe 5 is used to detect the wastewater flow. The larger the flow, the faster the rotation speed of the stirring motor 29, the faster the stirring speed and the flocculant powder adding speed are, and the stirring and mixing are carried out by the stirring paddle 23, so that the dirt in the wastewater is condensed into large flocs, and enters the filter mechanism 3 through the filter inlet pipe 6 at the lower end;

[0083] c. When the filter mechanism 3 is working, Fig.19 As shown, one of the filter screen plates 311 is horizontally located at the upper part of the treatment box 33, and the other filter screen plate 311 is vertically attached to the side of the treatment box 33. Wastewater flows out from the water inlet 34, flows through the horizontal filter screen plate 311, flows downward to the treatment box 33 after being filtered, and finally flows out from the water outlet 35.

[0084] d. When the wastewater flows through the horizontal filter screen 311, the filter screen 311 is driven to rotate by the guide plate 310, and the wastewater is filtered at various positions around the filter screen 311;

[0085] e. When the filter screen plate 311 in a horizontal state needs to be cleaned, Fig. 20 and Fig.21 As shown, the filter screen plate 311 attached to the side of the treatment box 33 swings to a horizontal state and moves upward through the lifting seat 313 until it reaches the top to filter the wastewater. Fig. 22 As shown, the filter screen plate 311 originally in a horizontal state swings upward to a vertical state and is located above the processing box 33;

[0086] f. Fig. 22 and Fig.23 As shown, the vertical pipe 322 in the jet device 32 rotates so that the nozzle at the end of the horizontal pipe 323 faces the filter screen 311 above the processing box 33, and the high-pressure gas blows the debris on the filter screen 311 to the debris collection box 36;

[0087] g. When the high-pressure gas blows toward the filter screen plate 311, the filter screen plate 311 is driven to rotate through the guide plate 310, so that air is blown to various positions around the filter screen plate 311;

[0088] h. Fig.23 As shown, the filter screen plate 311 after blowing is moved downward by the lifting seat 313 and fitted to the side of the processing box 33. Before moving downward, the filter screen plate 311 can be swung downward at a very small angle, and the feed port of the debris collection box 36 is out of the way. After descending, it does not need to remain in a completely vertical state.

[0089] i. Repeat steps ch to achieve alternating operation of the two filter screen plates 311.

[0090] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by using existing technologies, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention, and should also fall within the scope of protection of the claims of the present invention.

Claims

1. An iron powder reduction furnace cooling wastewater treatment system, characterized in that: The invention comprises a sedimentation tank (1), a flocculation mechanism (2) and a filtering mechanism (3) which are arranged in sequence. The flocculation mechanism (2) comprises a flocculation box (21), a stirring shaft (22) vertically connected to the flocculation box (21), and a stirring motor (29) for driving the stirring shaft (22) to rotate. A stirring paddle (23) is fixedly connected to the stirring shaft (22). The side of the sedimentation tank (1) is connected to the flocculation box (21) via a connecting pipe (5). A flow sensor (9) is installed on the connecting pipe (5). A flocculant powder box (25) is fixedly connected to the upper end of the flocculation box (21), a discharge pipe (26) is connected to the side of the flocculant powder box (25), a screw conveying paddle (27) is connected to the inner shaft of the discharge pipe (26), the screw conveying paddle (27) is connected to the stirring shaft (22) through a gear transmission assembly (28), a plurality of powder outlets are formed at the lower end of the discharge pipe (26), and the lower end of the flocculation box (21) is connected to the filtering mechanism (3) through a filtering inlet pipe (6); The filtering mechanism (3) comprises a processing box (33) and debris collection boxes (36) located on both sides of the processing box (33); two inner walls of the processing box (33) close to the debris collection box (36) are both provided with single-sided filtering components (31); a water inlet (34) located between the two single-sided filtering components (31) is provided above the processing box (33); the water inlet (34) is provided at the end of the filtering inlet pipe (6); a water outlet (35) is provided at the bottom of the processing box (33); the single-sided filtering component (31) comprises a lifting seat (313) vertically slidably connected to the inner wall of the processing box (33); a driving lifting mechanism (31) and a lifting mechanism (31) for driving the lifting mechanism (31); A lifting drive mechanism for lifting the seat (313) and a support rod (312) hinged on the lifting seat (313); a filter screen plate (311) is mounted on the support rod (312); a driving cylinder (314) is connected between the support rod (312) and the lifting seat (313); the driving cylinder (314) drives the support rod (312) to swing up and down so that the filter screen plate (311) swings between a horizontal state and an upper vertical state; when the filter screen plates (311) of the two unilateral filter assemblies (31) are both in a horizontal state, they partially overlap, and the overlapping portion is located below the water inlet (34); It also includes an air jet device (32) located above the processing box (33); when the filter screen plate (311) is in a vertical state and located above the processing box (33), the air jet device (32) blows the filtered debris on the filter screen plate (311) to the debris collection box (36); The jet device (32) comprises a fixed frame (321), a vertical pipe (322) vertically connected to the fixed frame (321), and a jet drive mechanism for driving the vertical pipe (322) to rotate; the lower end of the vertical pipe (322) is connected to a transverse pipe (323), a jet nozzle is provided on the transverse pipe (323), and the upper end of the vertical pipe (322) is connected to an air supply pipe (325) via a rotary joint (324); The filter screen plate (311) is circular and its center is rotatably connected to the support rod (312) via a vertical rotating shaft. A plurality of circumferentially arranged guide plates (310) are fixedly connected to the upper end surface of the filter screen plate (311). The guide plates (310) extend radially along the filter screen plate (311). The included angle between the guide plates (310) and the filter screen plate (311) is 60-80 degrees.

2. The iron powder reduction furnace cooling wastewater treatment system according to claim 1, characterized in that: The filter inlet pipe (6) is provided with an electric control valve (7).

3. The iron powder reduction furnace cooling wastewater treatment system according to claim 1, characterized in that: The gear transmission assembly (28) comprises a passive bevel gear fixedly connected to one end of the rotating shaft of the screw conveying paddle (27) and an active bevel gear fixedly connected to the stirring shaft (22).

4. The iron powder reduction furnace cooling wastewater treatment system according to claim 1, characterized in that: The jet drive mechanism comprises a rotating motor (328) and a passive gear (327) fixedly connected to the vertical tube (322); the rotating motor (328) is provided with a driving gear (326) meshing with the passive gear (327).

5. The iron powder reduction furnace cooling wastewater treatment system according to claim 1, characterized in that: A feed inlet located above the processing box (33) is provided on one side opposite to the two debris collection boxes (36); when the air jet device (32) blows air onto the filter screen plate (311), the filter screen plate (311) is located at the feed inlet.

6. The iron powder reduction furnace cooling wastewater treatment system according to claim 1, characterized in that: The lifting drive mechanism comprises a vertical lead screw (318) and a lifting motor (317) located on the side of the lead screw (318); the lifting motor (317) drives the lead screw (318) to rotate via a belt transmission assembly (319); and the nut of the lead screw (318) is fixedly connected to the lifting seat (313).

7. A method for using the iron powder reduction furnace cooling wastewater treatment system according to claim 1, characterized in that: The steps include: a. After the wastewater is precipitated in the sedimentation tank (1), the supernatant enters the flocculation tank (21) through the connecting pipe (5); b. The stirring motor (29) drives the stirring shaft (22) to rotate, and drives the screw conveying paddle (27) in the discharge pipe (26) to rotate through the gear transmission assembly (28). The screw conveying paddle (27) drives the flocculant powder in the flocculant powder box (25) to enter the discharge pipe (26), and falls from the powder outlet at the lower end into the wastewater in the flocculation box (21). The stirring paddle (23) stirs and mixes the wastewater, so that the wastewater is condensed into large flocs, and enters the filtering mechanism (3) through the filtering inlet pipe (6) at the lower end; c. When the filtering mechanism (3) is in operation, one of the filter screens (311) is horizontally located at the upper portion of the processing box (33), and the other filter screen (311) is vertically attached to the side of the processing box (33). Wastewater flows out from the water inlet (34), passes through the horizontal filter screen (311), and after being filtered, flows downward to the processing box (33), and finally flows out from the water outlet (35); d. When the wastewater flows through the filter screen plate (311) in a horizontal state, the filter screen plate (311) is driven to rotate by the guide plate (310), and filtering is achieved at various positions around the filter screen plate (311); e. When the filter screen plate (311) in a horizontal state needs to be cleaned, the filter screen plate (311) attached to the side of the treatment box (33) swings to a horizontal state and moves upward through the lifting seat (313) until it reaches the top to filter the wastewater, and the filter screen plate (311) in an originally horizontal state swings upward to a vertical state and is located above the treatment box (33); f. The vertical tube (322) in the air jet device (32) rotates so that the nozzle at the end of the horizontal tube (323) faces the filter screen (311) above the processing box (33), and the high-pressure gas blows the debris on the filter screen (311) to the debris collection box (36); g. When the high-pressure gas is blown toward the filter screen plate (311), the filter screen plate (311) is driven to rotate through the guide plate (310), thereby achieving air blowing at various positions around the filter screen plate (311); h. The filter screen plate (311) after blowing is moved downward by the lifting seat (313) and is attached to the side of the processing box (33).

Images