CN117865320A - System and method for disposing pickling wastewater by steel slag - Google Patents

Abstract

The invention provides a system and a method for disposing pickling wastewater by steel slag, belonging to the technical field of wastewater treatment. The device comprises an acid washing wastewater storage box, an acid washing wastewater treatment element and a circulating water outlet element, wherein the acid washing wastewater treatment element comprises a device body which is connected with the acid washing wastewater storage box through a wastewater pipeline and is provided with a first variable-frequency water pump at the joint, an atomization spraying assembly which is arranged at the upper end inside the device body, a steel slag filling assembly which is arranged in the device body and is positioned at the lower end of the atomization spraying assembly, and an automatic feeding assembly which is connected with the device body; the system fully utilizes the alkalinity and adsorptivity of the steel slag, neutralizes the acidity of the wastewater, adsorbs heavy metals in the wastewater, reduces the disposal cost of the pickling wastewater, treats the wastewater with the wastewater, has the advantages of energy conservation and environmental protection, discharges the treated water after being detected to be qualified, ensures that the quality of the discharged water strictly meets the discharge requirement, and simultaneously ensures that the working process of the system is automatic and coherent without human participation.

Description

System and method for disposing pickling wastewater by steel slag

Technical Field

The invention belongs to the technical field of wastewater treatment, and particularly relates to a system and a method for treating pickling wastewater by steel slag.

Background

Pickling is an important process in the metal surface treatment industry and the steel industry. Through acid washing, iron oxide on the surface of steel or metal processing products is removed, the quality of the surface structure of the steel is improved, and the metal surface is tidy. The acid concentration is reduced to a certain level, and after the metal ions in the acid liquor reach a certain concentration, the acid washing effect is reduced, and the discharged acid washing liquor becomes acid washing waste liquor. In recent years, the steel yield of China is always the first national world, the crude steel yield of China reaches 8.084 hundred million tons in 2016, the total global yield is 49.6%, the annual generated pickling waste liquid in China reaches millions of tons, and the current treatment process of the pickling waste liquid mainly comprises the following steps: spray roasting, evaporation crystallization, ion exchange, membrane separation, etc., and has large investment and high running cost.

The steel slag is discharged in the smelting process of a converter, an electric furnace and a refining furnace, is formed by impurities in metal raw materials, fluxing agents and furnace linings, and is slag taking silicate, ferrite and oxide as main components (GB/T51387-2019 technical standards for treating and comprehensively utilizing steel slag), and mainly comprises converter slag, electric furnace slag, casting residues, flat slag and the like. Every 1t of coarse steel is produced, 100-150 kg of steel slag is produced, and the annual production of the steel slag in China in recent years is estimated to be basically maintained or exceeds 1 hundred million t. In addition, the recycling utilization rate is not high, so that about 7000 ten thousand tons of steel slag are piled and abandoned each year, a large amount of land is occupied, and soil, air and water pollution is caused.

The steel slag contains a large amount of alkaline oxides to be alkaline, so that the low pH value of the pickling wastewater can be neutralized, meanwhile, the specific surface area of the steel slag is relatively large after grinding, and the steel slag can treat pollutants in the wastewater through chemical reaction and adsorption, so that the steel slag can be used for treating wastewater containing heavy metal ions and wastewater containing phosphorus, tombstone, fluorine and the like.

Therefore, a special device for disposing pickling wastewater by utilizing steel slag is needed.

Disclosure of Invention

Aiming at the problems, the invention provides a system and a method for disposing pickling wastewater by steel slag.

The technical scheme of the invention is as follows: a system for disposing pickling wastewater by steel slag comprises a pickling wastewater storage tank, a pickling wastewater treatment element and a circulating water outlet element;

the pickling waste water treatment element comprises a device body, an atomization spraying assembly, a steel slag filling assembly and an automatic feeding assembly, wherein the device body is connected with the pickling waste water storage box through a waste water pipeline, a first variable-frequency water pump is arranged at the joint of the device body, the atomization spraying assembly is arranged at the upper end inside the device body, the steel slag filling assembly is arranged in the device body and is positioned at the lower end of the atomization spraying assembly, and the automatic feeding assembly is connected with the device body;

the upper end of the device body is provided with a through mounting hole, the side wall of the device body is provided with a through feeding hole, a first automatic opening and closing cover plate is arranged at the through feeding hole, and the bottom end of the device body is provided with a slag hole and a water outlet; the atomization spraying assembly penetrates through the through mounting opening through the upper end and is connected with the waste water pipeline;

the steel slag filling assembly comprises a fixed mounting box arranged in the device body and positioned at the lower end of the through feeding port, a clamping fixing port arranged at the center of the fixed mounting box and communicated with each other at the upper end and the lower end, and a filtering filling frame, wherein the outer wall of the filtering filling frame is clamped with the clamping fixing port, the bottom end of the filtering filling frame is provided with a perforated baffle, the center of the perforated baffle is provided with a discharge port, and the discharge port is provided with a second automatic opening and closing cover plate;

the automatic feeding assembly comprises a second sliding rail which is arranged in the device body along the horizontal direction and is positioned at the lower end position of the through feeding opening, one side of the second sliding rail extends to the outside through the through feeding opening, a reinforcing frame which is arranged between the second sliding rail and the outer wall of the device body, and a steel slag conveying plate which can slide left and right along the second sliding rail, wherein the bottom end of the first automatic opening and closing cover plate is provided with a notch matched with the second sliding rail, and the bottom end of the steel slag conveying plate is provided with a third automatic opening and closing cover plate; the circulating water outlet element is connected with the water outlet.

Further, pickling waste water storage case upper end and outside waste water pipeline through connection and junction are equipped with the solenoid valve, and pickling waste water storage case left and right sides is equipped with washing mouth and filter residue mouth respectively, washing mouth and filter residue mouth slope distribution and washing mouth are located filter residue mouth upside department, wash the mouth bottom and be equipped with spacing mounting panel, just spacing mounting panel bottom is equipped with the movable pulley through rotating electrical machines driven, is equipped with the filter screen plate in the pickling waste water storage case, just filter screen plate one end with pickling waste water storage incasement wall butt, the other end through connecting rope with the movable pulley is connected, filter residue mouth department is equipped with temporary storage case, just be equipped with the filter residue that the bottom is network structure in the temporary storage case and deposit the drawer, just the filter residue is deposited and is formed the drainage between drawer bottom and the temporary storage case and is led to the mouth.

Description: when outside pickling waste water gets into pickling waste water storage box from the upper end, carry out preliminary filtration through the solid impurity in the pickling waste water through the filter screen plate, then, take out pickling waste water through the waste water pipe through first variable frequency water pump and spray the subassembly in to spray through atomizing, when needs clear up the filter screen plate, start rotating electrical machines, drive the movable pulley through rotating electrical machines and rotate clockwise, make the one end of filter screen plate be pulled up and be the incline state and distribute, then, spray the filter screen plate after the pressure boost of external water source through the mouth of washing, wash the filter screen plate, the filter residue after washing can get into the filter residue through the mouth of filter residue and deposit the drawer, and because of the netted structure of the filter residue deposit drawer bottom, make the water in the filter residue re-filter get into pickling waste water storage box in, the staff can deposit the drawer extraction with the filter residue regularly and clear up, above-mentioned in-mentioned process, the whole process is automatic going on, when having simplified the operating procedure, cleaning efficiency has been improved greatly.

Still further, pickling waste water storage box upper end is equipped with horizontal spout, wash mouthful department and be equipped with the washing dish, just wash the dish and be connected with washing mouthful through folding hose, wash a dish upper end and be equipped with T type connecting rod, the vertical section of T type connecting rod is connected with washing a dish upper end, and T type connecting rod horizontal segment passes through electric telescopic handle drive can be in horizontal spout is interior side-to-side.

Description: after outside water source gets into pickling waste water storage box inside through the mouth that washes, make the water source get into through folding hose wash in the dish and evenly spray at the filter screen plate upper end, simultaneously, through the flexible effect of electric telescopic handle, drive T type connecting rod and wash the dish and slide about in horizontal spout, make everywhere on the filter screen plate can wash in place, improve the washing effect, avoid appearing wasing the dead angle.

Still further, the filter screen plate comprises an installation outer frame and a filter screen arranged in the installation outer frame along the horizontal direction, the filter screen is formed by a plurality of filter strips in a grid-shaped distribution, and each filter strip is formed by a plurality of sub-filter strips in a spiral screwing mode.

Description: the outer frame is arranged to enclose the filter screen, so that the firmness of the filter screen is improved, the service life of the filter screen is prolonged, the filter strips forming the filter screen are formed by spirally screwing a plurality of sub-filter strips, and when the filter screen is flushed by water flow, the water flow can be spirally sprayed at each contact point due to the spiral structure, the impact force of water on the filter screen is improved, impurities are more easily separated from the filter screen, and the cleaning effect is improved.

Further, still include the packing and shake the subassembly, the packing shakes the subassembly and includes to locate in the filtration filling frame along the horizontal direction and the left and right sides runs through the filtration filling frame respectively and with the horizontal threaded rod of fixed mounting case left and right sides rotation connection, with horizontal threaded rod threaded connection and outer wall evenly are equipped with a plurality of rotatory installation cover of a plurality of vibrations bars, the rotatory positive and negative rotating electrical machines of drive horizontal threaded rod, are equipped with the telescopic link between two adjacent rotatory installation covers.

Description: when the steel slag filter material in the filtering filling frame needs to be replaced, the filling vibrating assembly can shake, the discharge speed of the steel slag filter material is accelerated, when the filling vibrating assembly works, the forward and reverse rotating motor is started, the horizontal threaded rod is driven to rotate clockwise and anticlockwise alternately through the forward and reverse rotating motor, each rotating installation sleeve rotates clockwise and anticlockwise on the horizontal threaded rod and moves left and right, in the process, the steel slag filter material is vibrated through the vibrating strip, the discharge speed of the steel slag filter material can be accelerated, and the steel slag filter material is enabled to fall cleanly.

Furthermore, a turning rack is arranged on one side, far away from the rotary installation sleeve, of each vibration bar, and a miniature vibrator is arranged inside each vibration bar.

Description: through set up the stirring rack on the vibrations strip, can be when vibrations strip is rotatory, turn the slag filter material and make it become flexible, in cooperation with the vibrations effect of miniature electromagnetic shaker, greatly increased slag filter material clearance speed.

Further, the circulating water outlet element comprises a water outlet pool connected with the water outlet through a water outlet pipeline, a pH on-line monitor arranged at the water outlet, a second variable-frequency water pump arranged on the water outlet pipeline, a circulating water pipe used for connecting the water outlet pipeline with a pickling wastewater storage box and a back flushing water pipe used for connecting the water outlet pool with an atomization spraying assembly, and electromagnetic valves are arranged on the circulating water pipe and the water outlet pipeline.

Description: when the water in the pickling waste water storage box flows out from the water outlet, the pH value of the water body is monitored on line through the pH value, when the set value is reached, the electromagnetic valve and the second variable frequency water pump are opened, the water body is temporarily stored in the water outlet tank through the water outlet pipeline by the pumping action of the second variable frequency water pump, when the pH value does not meet the requirement, the water body is pumped to the bottom end of the pickling waste water storage box again through the circulating water pipe, and the treatment is repeated.

Further, an infrared sensor is arranged on the first automatic opening and closing cover plate.

Description: by arranging the infrared sensor, the first automatic opening and closing cover plate can be opened and closed in time conveniently, and the operation reliability of the first automatic opening and closing cover plate is improved.

The invention also discloses a method for disposing the pickling wastewater by the steel slag, which is based on the system for disposing the pickling wastewater by the steel slag and comprises the following steps:

s1, after the external pickling wastewater is introduced into a pickling wastewater storage box, pumping the pickling wastewater into an atomization spraying assembly through a wastewater pipeline by a first variable-frequency water pump, and uniformly spraying the pickling wastewater into a filtering filling frame containing steel slag filter materials, at the moment, neutralizing the acidity of the wastewater and adsorbing heavy metals in the wastewater by utilizing the alkalinity and adsorptivity of steel slag, and enabling the treated water body to flow to the bottom of a device body through the filtering filling frame and flow out through a water outlet;

s2, when the steel slag filter material in the filtering filling frame needs to be replaced, opening a second automatic opening and closing cover plate, after the steel slag filter material in the filtering filling frame is completely discharged through a slag hole, opening a first automatic opening and closing cover plate, driving a steel slag conveying plate filled with the steel slag filter material to slide on a second sliding rail through an external driving device, entering the device body through a through feeding hole, opening a third automatic opening and closing cover plate at the moment, enabling the steel slag to fall into the filtering filling frame, then sliding the steel slag conveying plate out of the device body on the second sliding rail, repeating the process after the steel slag filter material is filled again until the filtering filling frame is filled with the steel slag filter material, and then closing the first automatic opening and closing cover plate;

s3, when the water body in the pickling wastewater storage box flows out from the water outlet, the water body enters the circulating water outlet element for temporary storage.

Compared with the prior art, the invention has the beneficial effects that:

(1) The system for disposing the pickling waste water by the steel slag fully utilizes the alkalinity and adsorptivity of the steel slag, neutralizes the acidity of the waste water, adsorbs heavy metals in the waste water, reduces the disposal cost of the pickling waste water, treats the waste with the waste, has the advantages of energy conservation and environmental protection, and when the system is used, the pickling waste water is uniformly sprayed to the upper end of a filtering filling frame in which the steel slag filter material is placed through an atomization spraying assembly and flows through the steel slag filter material to be treated, the treated water flows out through a water outlet, meanwhile, the pH value of the water is detected through a pH on-line monitor, when the pH value of the water meets the requirement, the water enters a water outlet tank through a water outlet pipeline for temporary storage, and when the pH value does not meet the requirement, the water is pumped to the bottom end of a pickling waste water storage tank again through a circulating water pipe for repeated treatment, on one hand, the water quality of effluent is guaranteed to strictly meet the emission requirement, the integral reliability of the device is improved, on the other hand, the whole process is automatic and coherent, no human participation is needed, and the degree of automation is high;

(2) The filter screen plate is further arranged in the pickling waste water storage box, solid impurities in the pickling waste water are filtered through the filter screen plate, so that the pipeline is prevented from being blocked, when the filter screen plate is required to be cleaned, the rotating motor drives the sliding wheel to rotate clockwise, one end of the filter screen plate is pulled up to be distributed in an inclined state, then an external water source is pressurized through the flushing port and sprayed onto the filter screen plate, the filter screen plate is flushed, the flushed filter residues enter the filter residue storage drawer through the filter residue port, and due to the net structure at the bottom end of the filter residue storage drawer, water in the filter residues is filtered again into the pickling waste water storage box, and a worker can regularly extract the filter residue storage drawer for cleaning;

(3) When the steel slag filter material in the filtering filling frame needs to be replaced, the steel slag filter material is dithered through the vibrating strip on the filler beating assembly, meanwhile, the steel slag filter material is turned through the turning rack to loosen the steel slag filter material, the cleaning speed of the steel slag filter material is greatly increased under the vibration action of the micro vibrator, when new steel slag filter material is required to be added into the filtering filling frame, the steel slag conveying plate filled with the steel slag filter material is driven by the external driving device to slide on the second sliding rail and enters the device body through the through feeding port, so that the steel slag falls into the filtering filling frame, then the steel slag conveying plate slides out of the device body on the second sliding rail to be filled with the steel slag filter material again, the process is repeated until the filtering filling frame is filled with the steel slag filter material, the timely replacement of the steel slag filter material is ensured, the treatment effect of pickling wastewater is improved, the waste utilization of industrial steel slag can be effectively realized, and the steel slag filtering filling device has the advantages of good treatment effect, simple process, energy conservation and emission reduction and the like, and is suitable for large-scale popularization.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of the invention at A in FIG. 1;

FIG. 3 is an enlarged view of the invention at B in FIG. 1;

FIG. 4 is an enlarged view of FIG. 1 at C in accordance with the present invention;

FIG. 5 is a schematic view of the mounting structure of the filter packing box and the fixed mounting box of the present invention;

FIG. 6 is a schematic view of the mounting structure of the first automatically opening and closing cover plate of the present invention;

FIG. 7 is a top view of a screen panel of the present invention;

fig. 8 is a cross-sectional view of a filter rod of the present invention.

Wherein, 1-pickling waste water storage tank, 10-waste water pipeline, 11-first variable frequency water pump, 113-flushing disk, 114-folding hose, 115-T type connecting rod, 116-electric telescopic rod, 12-flushing port, 120-limit mounting plate, 121-rotating motor, 122-sliding wheel, 13-slag filtering port, 130-temporary storage tank, 131-slag storage drawer, 132-water filtering inlet, 14-filter screen plate, 140-mounting frame, 141-filter screen, 142-filter strip, 143-sub filter strip, 15-horizontal chute, 2-pickling waste water treatment element, 20-device body, 200-through mounting port, 201-through feeding port, 202-first automatic opening and closing cover plate, 203-slag outlet, 204-water outlet, water outlet 205-gap, 206-infrared sensor, 21-atomizing spray assembly, 22-steel slag filling assembly, 220-fixed mounting box, 221-fixed mounting box, 222-filtering filling frame, 2220-perforated baffle, 2221-discharge opening, 2222-second automatic opening and closing cover plate, 23-automatic feeding assembly, 230-second sliding rail, 231-reinforcing frame, 232-steel slag conveying plate, 233-third automatic opening and closing cover plate, 24-filling rapping assembly, 240-horizontal threaded rod, 241-rotating mounting sleeve, 2410-vibration strip, 2411-turning rack, 2412-miniature vibrator, 242-forward and reverse rotating motor, 243-telescopic rod, 3-circulating water outlet element, 30-water outlet tank, 300-water outlet pipeline, 31-pH on-line monitor, 32-second variable frequency water pump, 33-circulating water pipe, 34-back flush water pipe.

Detailed Description

The present invention will be described in detail with reference to examples.

Example 1

As shown in fig. 1, a system for disposing pickling waste water by steel slag comprises a pickling waste water storage tank 1, a pickling waste water treatment element 2 and a circulating water outlet element 3;

the pickling wastewater treatment element 2 comprises a device body 20 which is connected with the pickling wastewater storage box 1 through a wastewater pipeline 10 and is provided with a first variable-frequency water pump 11 at the joint, an atomization spraying assembly 21 which is arranged at the upper end inside the device body 20, a steel slag filling assembly 22 which is arranged inside the device body 20 and is positioned at the lower end of the atomization spraying assembly 21, and an automatic feeding assembly 23 which is connected with the device body 20;

as shown in fig. 2 and 6, a through mounting hole 200 is formed at the upper end of the device body 20, a through feeding hole 201 is formed in the side wall of the device body 20, a first automatic opening and closing cover plate 202 is arranged at the through feeding hole 201, and a slag outlet 203 and a water outlet 204 are formed at the bottom end of the device body 20; the atomizing spray assembly 21 penetrates through the through mounting opening 200 through the upper end and is connected with the waste water pipeline 10;

as shown in fig. 5, the steel slag filling assembly 22 comprises a fixed mounting box 220 arranged in the device body 20 and positioned at the lower end position of a through feeding port 201, a clamping fixing port 221 arranged at the center of the fixed mounting box 220 and having mutually through upper and lower ends, a filtering filling frame 222 with an outer wall clamped with the clamping fixing port 221 and provided with a perforated baffle 2220 at the bottom end, a discharge port 2221 arranged at the center of the perforated baffle 2220, and a second automatic opening and closing cover plate 2222 arranged at the discharge port 2221;

as shown in fig. 1, the automatic feeding assembly 23 includes a second slide rail 230 disposed in the device body 20 along a horizontal direction and located at a lower end position of the through feeding port 201, and one side of the second slide rail extends to the outside through the through feeding port 201, a reinforcing frame 231 disposed between the second slide rail 230 and an outer wall of the device body 20, and a steel slag conveying plate 232 capable of sliding left and right along the second slide rail 230, wherein a gap 205 matched with the second slide rail 230 is provided at a bottom end of the first automatic opening and closing cover plate 202, and a third automatic opening and closing cover plate 233 is provided at a bottom end of the steel slag conveying plate 232; the circulating water outlet element 3 is connected with the water outlet 204;

the circulating water outlet element 3 comprises a water outlet tank 30 connected with the water outlet 204 through a water outlet pipeline 300, a pH on-line monitor 31 arranged at the water outlet 204, a second variable frequency water pump 32 arranged on the water outlet pipeline 300, a circulating water pipe 33 used for connecting the water outlet pipeline 300 and the pickling wastewater storage tank 1, and a back flushing water pipe 34 used for connecting the water outlet tank 30 and the atomizing spray assembly 21, wherein electromagnetic valves are arranged on the circulating water pipe 33 and the water outlet pipeline 300;

an infrared sensor 206 is arranged on the first automatic opening and closing cover plate 202;

the first variable-frequency water pump 11, the first automatic opening and closing cover plate 202, the second automatic opening and closing cover plate 2222, the third automatic opening and closing cover plate 233, the second variable-frequency water pump 32 and the infrared sensor 206 all adopt the prior art.

Example 2

The embodiment discloses a method for disposing pickling wastewater by steel slag, which is based on a system for disposing pickling wastewater by steel slag in embodiment 1, and comprises the following steps:

s1, after the external pickling wastewater is introduced into a pickling wastewater storage box 1, pumping the pickling wastewater into an atomization spraying assembly 21 through a wastewater pipeline 10 by a first variable-frequency water pump 11, and uniformly spraying the pickling wastewater into a filtering filling frame 222 containing steel slag filtering materials, at the moment, neutralizing the acidity of the wastewater and adsorbing heavy metals in the wastewater by utilizing the alkalinity and adsorptivity of steel slag, and flowing the treated water body to the bottom of a device body 20 through the filtering filling frame 222 and flowing out through a water outlet 204;

s2, when the steel slag filter material in the filtering and filling frame 222 needs to be replaced, opening a second automatic opening and closing cover plate 2222, after the steel slag filter material in the filtering and filling frame 222 is completely discharged through a slag hole 203, opening a first automatic opening and closing cover plate 202, driving a steel slag conveying plate 232 filled with the steel slag filter material to slide on a second sliding rail 230 through an external driving device, entering the device body 20 through a through feeding hole 201, opening a third automatic opening and closing cover plate 233 at the moment, enabling the steel slag to fall into the filtering and filling frame 222, then sliding the steel slag conveying plate 232 out of the device body 20 on the second sliding rail 230, repeating the process until the filtering and filling frame 222 is filled with the steel slag filter material again, and then closing the first automatic opening and closing cover plate 202;

s3, when the water body in the pickling wastewater storage tank 1 flows out from the water outlet 204, the pH value of the water body is monitored by the pH on-line monitor 31, when the pH value reaches a set value, the electromagnetic valve and the second variable frequency water pump 32 are opened, the water body enters the water outlet tank 30 for temporary storage through the water outlet pipeline 300 under the extraction action of the second variable frequency water pump 32, when the pH value does not meet the requirement, the water body is pumped to the bottom end of the pickling wastewater storage tank 1 again through the circulating water pipe 33, and the treatment is repeated.

Example 3

This embodiment differs from embodiment 1 in that:

as shown in fig. 1, the upper end of the pickling waste water storage tank 1 is in through connection with an external waste water pipeline 10, an electromagnetic valve is arranged at the connection part, a flushing port 12 and a residue port 13 are respectively arranged at the left side and the right side of the pickling waste water storage tank 1, the flushing port 12 and the residue port 13 are obliquely distributed, the flushing port 12 is positioned at the upper side of the residue port 13, a limit mounting plate 120 is arranged at the bottom end of the flushing port 12, a sliding wheel 122 driven by a rotating motor 121 is arranged at the bottom end of the limit mounting plate 120, a filter screen 14 is arranged in the pickling waste water storage tank 1, one end of the filter screen 14 is abutted against the inner wall of the pickling waste water storage tank 1, the other end of the filter screen is connected with the sliding wheel 122 through a connecting rope, a temporary storage tank 130 is arranged at the residue port 13, a residue storage drawer 131 with a net-shaped bottom end is arranged in the temporary storage tank 130, and a water filtering through port 132 is formed between the bottom end of the residue storage drawer 131 and the temporary storage tank 130;

as shown in fig. 3, a horizontal chute 15 is arranged at the upper end of the pickling waste water storage tank 1, a flushing disc 113 is arranged at the flushing port 12, the flushing disc 113 is connected with the flushing port 12 through a folding hose 114, a T-shaped connecting rod 115 is arranged at the upper end of the flushing disc 113, the vertical section of the T-shaped connecting rod 115 is connected with the upper end of the flushing disc 113, and the horizontal section of the T-shaped connecting rod 115 can slide left and right in the horizontal chute 15 through the driving of an electric telescopic rod 116;

as shown in fig. 7 and 8, the filter screen plate 14 comprises a mounting frame 140 and a filter screen 141 arranged in the mounting frame 140 along the horizontal direction, the filter screen 141 is formed by distributing 21 filter strips 142 in a grid shape, and each filter strip 142 is formed by screwing 6 sub-filter strips 143 in a spiral shape;

wherein, the rotary motor 121 and the electric telescopic rod 116 are both in the prior art.

Example 4

This embodiment differs from embodiment 2 in that:

in the step S1, after the external pickling waste water is introduced into the pickling waste water storage box 1, solid impurities in the pickling waste water are subjected to preliminary filtration through the filter screen plate 14, and then the pickling waste water is pumped into the atomizing spray assembly 21 through the waste water pipeline 10 by the first variable-frequency water pump 11;

when the filter screen plate 14 needs to be cleaned, the rotating motor 121 is started, the sliding wheel 122 is driven to rotate clockwise through the rotating motor 121, one end of the filter screen plate 14 is pulled up to be distributed in an inclined state, then an external water source is pressurized through the flushing port 12 and sprayed onto the filter screen plate 14, the filter screen plate 14 is flushed, the flushed filter residues enter the filter residue storage drawer 131 through the filter residue port 13, and due to the net structure at the bottom end of the filter residue storage drawer 131, water in the filter residues is filtered again and enters the pickling wastewater storage tank 1, and workers can regularly draw the filter residue storage drawer 131 to clean.

Example 5

This embodiment differs from embodiment 3 in that:

as shown in fig. 4, the device further comprises a filler rapping assembly 24, wherein the filler rapping assembly 24 comprises a horizontal threaded rod 240 which is arranged in the filtering filling frame 222 along the horizontal direction, the left side and the right side of the filler rapping assembly respectively penetrate through the filtering filling frame 222 and are rotationally connected with the left side and the right side of the fixed mounting box 220, 3 rotary mounting sleeves 241 which are in threaded connection with the horizontal threaded rod 240 and are uniformly provided with 3 vibrating strips 2410 on the outer wall, a forward and reverse rotary motor 242 which drives the horizontal threaded rod 240 to rotate, and a telescopic rod 243 is arranged between every two adjacent rotary mounting sleeves 241;

a turning rack 2411 is arranged on one side of each vibration bar 2410 far away from the rotary mounting sleeve 241, and a miniature vibrator 2412 is arranged inside each vibration bar 2410;

the forward and reverse rotation motor 242 and the micro vibrator 2412 are both of the prior art.

Example 6

This embodiment differs from embodiment 4 in that:

in step S3, when the steel slag filter material in the filtering and filling frame 222 needs to be replaced, the second automatic opening and closing cover plate 2222 is opened, the forward and reverse rotating motor 242 is started, the horizontal threaded rod 240 is driven to rotate clockwise and anticlockwise alternately by the forward and reverse rotating motor 242, so that each rotary mounting sleeve 241 rotates clockwise and anticlockwise on the horizontal threaded rod 240 and moves left and right, and in the process, the steel slag filter material is dithered by the vibrating bar 2410, so that the discharge rate can be accelerated.

Claims (9)

1. A system for disposing pickling wastewater by steel slag, which is characterized by comprising a pickling wastewater storage tank (1), a pickling wastewater treatment element (2) and a circulating water outlet element (3);

the pickling wastewater treatment element (2) comprises a device body (20) which is connected with the pickling wastewater storage box (1) through a wastewater pipeline (10) and is provided with a first variable-frequency water pump (11) at the joint, an atomization spraying assembly (21) which is arranged at the upper end inside the device body (20), a steel slag filling assembly (22) which is arranged in the device body (20) and is positioned at the lower end of the atomization spraying assembly (21), and an automatic feeding assembly (23) which is connected with the device body (20);

the upper end of the device body (20) is provided with a through mounting opening (200), the side wall of the device body (20) is provided with a through feeding opening (201), a first automatic opening and closing cover plate (202) is arranged at the through feeding opening (201), and the bottom end of the device body (20) is provided with a slag outlet (203) and a water outlet (204); the atomization spraying assembly (21) penetrates through the through mounting opening (200) through the upper end and is connected with the waste water pipeline (10);

the steel slag filling assembly (22) comprises a fixed installation box (220) arranged in the device body (20) and positioned at the lower end position of the through feeding port (201), a clamping fixing port (221) arranged at the center of the fixed installation box (220) and communicated with each other at the upper end and the lower end, a filtering filling frame (222) with an outer wall clamped with the clamping fixing port (221) and provided with a perforated baffle plate (2220) at the bottom end, a discharge port (2221) is arranged at the center of the perforated baffle plate (2220), and a second automatic opening and closing cover plate (2222) is arranged at the discharge port (2221);

the automatic feeding assembly (23) comprises a second sliding rail (230) which is arranged in the device body (20) along the horizontal direction and is positioned at the lower end position of the through feeding opening (201) and one side of which extends to the outside through the through feeding opening (201), a reinforcing frame (231) which is arranged between the second sliding rail (230) and the outer wall of the device body (20), and a steel slag conveying plate (232) which can slide left and right along the second sliding rail (230), wherein a gap (205) matched with the second sliding rail (230) is formed at the bottom end of the first automatic opening and closing cover plate (202), and a third automatic opening and closing cover plate (233) is arranged at the bottom end of the steel slag conveying plate (232); the circulating water outlet element (3) is connected with the water outlet (204).

2. The system for disposing pickling wastewater by steel slag according to claim 1, wherein the upper end of the pickling wastewater storage tank (1) is connected with an external wastewater pipeline (10) in a penetrating way, an electromagnetic valve is arranged at the joint, a flushing port (12) and a residue port (13) are respectively arranged at the left side and the right side of the pickling wastewater storage tank (1), the flushing port (12) and the residue port (13) are obliquely distributed, the flushing port (12) is positioned at the upper side of the residue port (13), a limiting mounting plate (120) is arranged at the bottom end of the flushing port (12), a sliding wheel (122) driven by a rotating motor (121) is arranged at the bottom end of the limiting mounting plate (120), a filter screen (14) is arranged in the pickling wastewater storage tank (1), one end of the filter screen (14) is connected with the inner wall of the pickling wastewater storage tank (1) in a propping way, a temporary storage tank (130) is arranged at the residue port (13), a residue storage drawer (131) with a net-shaped bottom end is arranged in the temporary storage tank (130), and a filter residue storage drawer (131) with the bottom end being in a net-shaped structure is arranged between the temporary storage drawer (131) and the bottom end of the temporary storage tank (130) to form a water filtering inlet (132).

3. The system for disposing pickling waste water by using steel slag according to claim 2, wherein a horizontal chute (15) is arranged at the upper end of the pickling waste water storage tank (1), a flushing disc (113) is arranged at the flushing port (12), the flushing disc (113) is connected with the flushing port (12) through a folding hose (114), a T-shaped connecting rod (115) is arranged at the upper end of the flushing disc (113), a vertical section of the T-shaped connecting rod (115) is connected with the upper end of the flushing disc (113), and a horizontal section of the T-shaped connecting rod (115) can slide left and right in the horizontal chute (15) through a motor telescopic rod (116) in a driving mode.

4. A system for disposing pickling waste water by steel slag according to claim 3, wherein the filter screen plate (14) comprises a mounting outer frame (140) and a filter screen (141) arranged in the mounting outer frame (140) along a horizontal direction, the filter screen (141) is formed by a plurality of filter strips (142) in a grid-like distribution, and each filter strip (142) is formed by a plurality of sub-filter strips (143) in a spiral screwing manner.

5. The system for treating pickling wastewater by steel slag according to claim 1, further comprising a filler rapping assembly (24), wherein the filler rapping assembly (24) comprises a horizontal threaded rod (240) which is arranged in the filtering filling frame (222) along the horizontal direction, the left side and the right side of the horizontal threaded rod penetrate through the filtering filling frame (222) respectively and are rotationally connected with the left side and the right side of the fixed mounting box (220), a plurality of rotary mounting sleeves (241) which are in threaded connection with the horizontal threaded rod (240) and are uniformly provided with a plurality of vibrating strips (2410) on the outer wall, a forward and reverse rotary motor (242) for driving the horizontal threaded rod (240) to rotate, and a telescopic rod (243) is arranged between every two adjacent rotary mounting sleeves (241).

6. The steel slag pickling wastewater treatment system according to claim 5, wherein a turning rack (2411) is arranged on one side, away from the rotary mounting sleeve (241), of each vibrating strip (2410), and a miniature vibrator (2412) is arranged inside each vibrating strip (2410).

7. The system for disposing pickling wastewater by using steel slag according to claim 1, wherein the circulating water outlet element (3) comprises a water outlet tank (30) connected with the water outlet (204) through a water outlet pipeline (300), a pH on-line monitor (31) arranged at the water outlet (204), a second variable frequency water pump (32) arranged on the water outlet pipeline (300), a circulating water pipe (33) used for connecting the water outlet pipeline (300) with the pickling wastewater storage tank (1), and a back flushing water pipe (34) used for connecting the water outlet tank (30) with the atomizing spray assembly (21), wherein electromagnetic valves are arranged on the circulating water pipe (33) and the water outlet pipeline (300).

8. The system for treating pickling wastewater by using steel slag according to claim 1, wherein an infrared sensor (206) is arranged on the first automatically opened and closed cover plate (202).

9. A method for disposing of pickling waste water from steel slag, a system for disposing of pickling waste water from steel slag according to any one of claims 1 to 8, comprising the steps of:

s1, after the external pickling wastewater is introduced into a pickling wastewater storage box (1), pumping the pickling wastewater into an atomization spraying assembly (21) through a wastewater pipeline (10) by a first variable-frequency water pump (11), uniformly spraying the pickling wastewater into a filtering filling frame (222) containing steel slag filtering materials, neutralizing the acidity of the wastewater and absorbing heavy metals in the wastewater by utilizing the alkalinity and adsorptivity of the steel slag, and flowing the treated water to the bottom of a device body (20) through the filtering filling frame (222) and flowing out through a water outlet (204);

s2, when the steel slag filter material in the filtering filling frame (222) needs to be replaced, opening a second automatic opening and closing cover plate (2222), after the steel slag filter material in the filtering filling frame (222) is completely discharged through a slag outlet (203), opening a first automatic opening and closing cover plate (202), driving a steel slag conveying plate (232) filled with the steel slag filter material to slide on a second sliding rail (230) through an external driving device, entering the device body (20) through a through feeding hole (201), opening a third automatic opening and closing cover plate (233) at the moment, enabling the steel slag to fall into the filtering filling frame (222), sliding a steel slag conveying plate (232) out of the device body (20) on a second sliding rail (230), repeating the process until the filtering filling frame (222) is filled with the steel slag filter material again, and closing the first automatic opening and closing cover plate (202);

s3, when the water body in the pickling wastewater storage tank (1) flows out from the water outlet (204), the water body enters the circulating water outlet element (3) for temporary storage.