1. An energy-saving and environment-friendly sewage treatment device comprises a treatment tank body (1) and a support frame (2) positioned at the bottom of the treatment tank body (1), and is characterized in that an adsorption device, a cleaning device and a stirring device are sequentially arranged in the treatment tank body (1) along the height of the treatment tank body downwards, the adsorption device can effectively adsorb metal ions in industrial sewage, the cleaning device can be used for cleaning the metal ions on a protective cover, and an electricity utilization interface (3) is arranged on one side of the treatment tank body (1);
the adsorption device comprises a water inlet (5) formed in the center of the upper surface of the treatment tank body (1), and a water inlet pipeline (6) is fixedly inserted into the water inlet (5); a water inlet control valve (7) is installed on the water inlet pipeline (6), and a first connecting flange (8) is fixedly installed at the water inlet end of the water inlet pipeline (6); a group of opposite electromagnet mounting boxes (9) are fixedly mounted on the opposite outer side surfaces of the treatment tank body (1), and electromagnets (10) are fixedly mounted in the electromagnet mounting boxes (9); an electric coil (11) is wound on the outer side surface of one end of the electromagnet (10), and the other end of one end of the electromagnet (10) penetrates through the side surface of the treatment tank body (1); the electromagnet (10) penetrates through the outer side surface of one end of the treatment tank body (1) and is fixedly provided with a protective cover (12); an infrared signal receiver (13) is fixedly arranged on the inner wall of one side of the electromagnet mounting box (9);
the cleaning device comprises a group of opposite circular through holes I (14) which are formed in two sides of the upper surface of the treatment tank body (1), and fastening bearings I (15) are embedded in the circular through holes I (14); a first transmission shaft (16) is inserted into the first fastening bearing (15), the upper end of the first transmission shaft (16) extends out of the first fastening bearing (15), and a driven gear (17) is fixedly installed at the upper end of the first transmission shaft (16) extending out of the first fastening bearing (15); a group of opposite rotating motors I (18) are fixedly installed on two sides of the upper surface of the treatment tank body (1), the rotating ends of the rotating motors I (18) are vertically upward, and driving gears (19) are fixedly installed on the rotating ends of the rotating motors I (18); the driving gear (19) is meshed with the driven gear (17); the lower end of the first transmission shaft (16) is downwards and upwards provided with external threads along the length of the first transmission shaft, and the lower end of the first transmission shaft (16) is in threaded connection with a sliding block (20); a cleaning brush support frame (21) is fixedly arranged on the surface of one side of the sliding block (20), and a cleaning brush (22) is fixedly arranged at the tail end of the cleaning brush support frame (21);
the stirring device comprises a second circular through hole (23) formed in the center of the lower surface of the treatment tank body (1), and a second fastening bearing (24) is embedded in the second circular through hole (23); a second transmission shaft (25) is inserted into the second fastening bearing (24), the lower end of the second transmission shaft (25) extends out of the second fastening bearing (24), and a first belt pulley (26) is fixedly mounted at the lower end of the second transmission shaft (25) extending out of the second fastening bearing (24); a second rotating motor (27) is fixedly installed on the outer side surface of the treatment tank body (1), and the rotating end of the second rotating motor (27) faces downwards vertically; a speed reducer (28) is installed on the second rotating motor (27), and a second belt pulley (29) is fixedly installed at the rotating end of the second rotating motor (27); the belt pulley I (26) and the belt pulley II (29) are sleeved with a transmission belt (30), and the transmission belt (30) is a V-shaped transmission belt; a plurality of stirrers (31) are uniformly arranged at the upper end of the second transmission shaft (25); an impurity filter screen supporting plate (32) is fixedly installed at the bottom in the treatment tank body (1), an impurity filter screen (33) is fixedly installed on the impurity filter screen supporting plate (32), an impurity outlet (34) is formed in one side of the bottom of the treatment tank body (1), an impurity discharging pipeline (35) is inserted into the impurity outlet (34), and an impurity discharging control valve (36) is fixedly installed on the impurity discharging pipeline (35); the impurity outlet (34) corresponds to the position of the impurity filter screen supporting plate (32); a water outlet (37) is formed in one side of the bottom of the treatment tank body (1), and a water outlet pipeline (38) is fixedly inserted in the water outlet (37); a water outlet control valve (39) is arranged on the water outlet pipeline (38), and a connecting flange II (40) is fixedly arranged at the water outlet end of the water outlet pipeline (38);
the upper end of the treatment tank body (1) is provided with a controller (4), and the signal output end of the controller (4) is electrically connected with the electric coil, the infrared signal receiver, the first rotating motor and the second rotating motor respectively; the infrared signal receiver (13) is respectively and electrically connected with the controller (4) and the electric coil (11); after the controller (4) gives an instruction, the infrared signal receiver (13) receives a signal and controls the switch of the electric coil (11); when the electric coil (11) is electrified, the other end of the electromagnet (10) generates a magnetic field, and metal ions in the industrial sewage can be adsorbed through the protective cover (12);
the first rotating motor (18) can drive a driving gear (19) on the rotating end, the driving gear (19) is meshed with a driven gear (17) so as to drive a first transmission shaft (16) on the driven gear (17), and a cleaning brush (22) on the first transmission shaft (16) can be used for cleaning metal ions on the protective cover (12);
the second rotating motor (27) can drive the second belt pulley (29) on the rotating end, the first belt pulley (26) and the second belt pulley (29) are sleeved with the transmission belt (30), so that the second transmission shaft (25) on the first belt pulley (26) is driven, and the stirrer (31) on the second transmission shaft (25) can effectively stir the industrial sewage, so that the metal ion adsorption effect is improved;
a capacitive display screen (41) is arranged on the controller (4), the capacitive display screen (41) can display the liquid level in the treatment tank body (1), and a function button (42) and a switch device (43) are arranged on the controller (4);
the power utilization interface (3) is electrically connected with an external power supply, and the power supply output end of the power utilization interface (3) is electrically connected with the power supply input ends of the electric coil (11), the infrared signal receiver (13), the first rotating motor (18) and the second rotating motor (27) respectively;
when the device is used, a user fixedly connects an external industrial wastewater pipeline with a water inlet pipeline (6) through a first connecting flange (8), fixedly connects an external sewage discharge pipeline with a water outlet pipeline (38) through a second connecting flange (40), electrically connects an electric interface (3) with an external power supply, and turns on a switch device (43);
the first step is as follows: opening a water inlet control valve (7), enabling industrial sewage to enter a treatment tank body (1) through a water inlet (5), firstly enabling an adsorption device to start working, after a controller (4) issues an instruction, enabling an infrared signal receiver (13) to receive a signal and controlling an electric coil (11) to be electrified, enabling the other end of an electromagnet (10) to generate a magnetic field and adsorbing metal ions in the industrial sewage through a protective cover (12) after the electric coil (11) is electrified, enabling the adsorption device in the treatment tank body to effectively adsorb the metal ions in the industrial sewage, enabling a stirring device to start working at the same time, enabling a rotating motor II (27) to drive a rotating end pulley II (29), enabling a driving belt (30) to be sleeved on the pulley I (26) and the pulley II (29), and further enabling a driving shaft II (25) on the pulley I (26) to be driven, and enabling a stirrer (31) on the driving shaft II (25) to effectively stir the industrial sewage, the adsorption effect of metal ions is improved, the stirring device improves the adsorption effect of the metal ions, and the adsorbed industrial sewage is filtered by an impurity filter screen (33) and finally discharged through a water outlet pipeline (38);
the second step is that: the metal ion on user's accessible cleaning device clearance protection casing (12), the metal ion after the clearance can be retrieved and recycled according to the demand, the user assigns the instruction through controller (4), cleaning device begins work, rotating electrical machines (18) can drive driving gear (19) on the rotatory end, driving gear (19) and driven gear (17) intermeshing, thereby it begins rotatoryly to drive transmission shaft (16) on driven gear (17), sliding block (20) and transmission shaft (16) threaded connection, reciprocating motion is done on transmission shaft (16) to sliding block (20), sliding block (20) drive cleaning brush (22) can be used for clearing up the metal ion on protection casing (12), the metal ion after the clearance is discharged through impurity export (34).