Cold rolling wastewater zero discharge coupling sodium hypochlorite preparation system

Abstract

The invention relates to the technical field of thermal power plant wastewater treatment, and provides a cold rolling wastewater zero-discharge coupling sodium hypochlorite preparation system which comprises an electrolytic tank, a heat exchange tank, a spraying tank, a treatment tank and a water storage tank. A connecting pipe A penetrates through the side face of the electrolytic tank and is fixedly connected with the side face of the electrolytic tank, and a pump body is arranged at the middle end of the connecting pipe A; and one end, far away from the electrolytic tank, of the connecting pipe A penetrates through and is fixedly connected with the heat exchange tank. By arranging the dismounting mechanism, when the cathode and anode shafts need to be dismounted, a pull rod is pulled towards the side to enable an arc-shaped block to leave a clamping groove, and at the moment, a compression spring can rebound to drive a mounting head to bounce upwards by a small distance; and then the mounting head and the cathode and anode shaft can be taken down and remounted, the arrow groove in the top of the mounting head is aligned to the direction and is downwards inserted into the mounting seat, the arc-shaped block can automatically enter the clamping groove so that the mounting head cannot be separated from the mounting seat, mounting and dismounting are simple, and later maintenance is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment in thermal power plants, and in particular to a cold rolling wastewater zero-discharge coupled sodium hypochlorite preparation system. Background Art

[0002] Thermal power plant wastewater is generated during the power generation process using coal, oil, combustible gases, and other fuels. It primarily includes ash flushing water, dust removal water, industrial wastewater, domestic sewage, acid and alkali wastewater, and condenser cooling water drainage. Dust removal water and industrial wastewater are generally discharged into the ash water system, while acid and alkali wastewater primarily comes from the boiler feedwater system. Waste acid is generally discharged into a neutralization tank before being discharged. Direct discharge of condenser cooling water drainage can cause thermal pollution and impact the reproduction and growth of aquatic organisms. Zero discharge of desulfurization wastewater is a key challenge in thermal power plant wastewater treatment.

[0003] The invention with publication number CN105858990A discloses a process for preparing sodium hypochlorite solution using zero-discharge salt solution of desulfurization wastewater, comprising the following steps: a: transporting desulfurization wastewater collected from the desulfurization wastewater source to a desulfurization wastewater pretreatment device, performing pre-precipitation, double alkali and filtration treatment on the desulfurization wastewater, and transporting the treated wastewater to a brine purification device; b: the brine purification device performs microfiltration, nanofiltration and softening treatment on the pretreated wastewater to remove bacteria, particulates, small molecular organic matter, calcium ions and magnesium ions, etc. in the wastewater, and then transports the purified wastewater to a brine concentration device; c: the brine concentration device concentrates the wastewater, and the concentrated water after the treatment is a saturated salt solution, which enters a sodium hypochlorite generator for electrolysis reaction.

[0004] In the above application documents, the desulfurization wastewater is subjected to pre-precipitation, double alkali and filtration treatment and the treated wastewater is transported to the brine purification device. The overall assembly is difficult, and the effect of treating the wastewater is poor. The heat energy generated during the treatment process will be wasted, which is not conducive to energy saving. Summary of the Invention

[0005] The present invention proposes a cold rolling wastewater zero-discharge coupled sodium hypochlorite preparation system, which solves the problems raised in the above documents.

[0006] The technical solution of the present invention is as follows: a cold rolling wastewater zero-discharge coupled sodium hypochlorite preparation system, comprising an electrolytic cell, a heat exchange tank, a spray tank, a treatment tank and a water storage tank, wherein a connecting pipe A is passed through and fixedly connected to the side of the electrolytic cell, a pump body is provided at the middle end of the connecting pipe A, an end of the connecting pipe A away from the electrolytic cell is passed through and fixedly connected to the heat exchange tank, a spiral heat exchange tube is provided inside the heat exchange tank, a connecting pipe B is passed through and fixedly connected to the side of the spray tank at one end away from the heat exchange tank, a connecting pipe C is passed through and fixedly connected to the side of the spray tank at one end away from the connecting pipe B, a connecting pipe C is passed through and fixedly connected to the top of the treatment tank at one end away from the spray tank, a wastewater pipe is passed through and fixedly connected to the bottom of the spray tank, and the treatment tank A feed pipe and an air outlet pipe are passed through and fixedly connected to the top, a discharge pipe is passed through and fixedly connected to the bottom of the treatment tank, a disassembly and assembly mechanism is provided on the top of the electrolytic cell, and a rotating spray mechanism and a cleaning mechanism are provided inside the spray tank; the disassembly and assembly mechanism includes a mounting seat and a mounting head, the mounting seat passes through and is fixedly connected to the top of the electrolytic cell, a compression spring is provided inside the mounting seat, a groove is provided on the inner side wall of the mounting seat, a telescopic spring is provided inside the groove, an arc block is slidably connected to the inside of the groove through the telescopic spring, a pull rod is fixedly connected to the side of the arc block close to the telescopic spring, the pull rod passes through and is slidably connected to the side of the mounting seat, an arrow groove is provided on the top of the mounting head, a cathode and anode shafts are provided at the bottom of the mounting head, and a card slot is provided on the side of the mounting head.

[0007] The opening size of the groove is equal to that of the clamping slot, and half of the arc block is located in the clamping slot in the initial state. When the arc block is clamped in the clamping slot, the mounting head cannot leave the mounting seat.

[0008] The arc surface of the arc block faces upward, and the transverse depth of the groove is greater than the transverse length of the arc block. When the arc surface of the arc block is squeezed, it will move into the groove, and the arc block can be completely retracted into the groove.

[0009] The bottom of the mounting head is in conflict with the compression spring in the initial state, and the compression spring is in a compressed state in the initial state. When the compression spring rebounds, it drives the mounting head to move upward, thereby causing the slot and the groove to be misaligned.

[0010] The rotary spray mechanism includes a motor and a bracket, the motor is fixedly mounted on the top of the spray tank, the motor is fixedly connected to a rotating shaft through its output shaft, the bottom of the rotating shaft is fixedly connected to a spray pipe, the surface of the rotating shaft is fixedly connected to a rotating gear, the bracket is fixedly connected to the side of the spray tank, the top of the bracket is fixedly connected to a pressure chamber, a return spring is provided inside the pressure chamber, the interior of the pressure chamber is slidably connected to a piston rod A through a return spring piston, the end of the piston rod A away from the pressure chamber is fixedly connected to a gear rod, the rear end of the pressure chamber passes through and is fixedly connected to a water suction pipe, the bottom of the pressure chamber passes through and is fixedly connected to a water outlet pipe, a one-way valve is provided inside both the water suction pipe and the water outlet pipe, the end of the water suction pipe away from the pressure chamber passes through and is fixedly connected to the top of the water storage tank, and the end of the water outlet pipe away from the pressure chamber passes through and is rotatably connected to the bottom of the spray pipe.

[0011] The teeth on the gear rod are matched with the teeth on the rotating gear, and the rotating gear is an incomplete gear. When the rotating gear rotates and its upper teeth are engaged with the teeth on the gear rod, the gear rod will be driven to move rightward.

[0012] The one-way valve in the water suction pipe is one-way conductive toward the interior of the pressure chamber, and the one-way valve in the water outlet pipe is one-way conductive toward the interior of the spray pipe. When negative pressure is formed in the pressure chamber, the liquid in the water storage tank will be sucked into the pressure chamber through the water suction pipe, and when the liquid in the pressure chamber is squeezed, it will be discharged to the spray pipe through the water outlet pipe.

[0013] The cleaning mechanism includes an air pressure chamber and an eccentric ring. The air pressure chamber is fixedly connected to the inner bottom of the spray tank. An air bag is provided at one end of the air pressure chamber. The internal piston at the other end of the air pressure chamber is slidably connected to a piston rod B. The end of the piston rod B away from the air pressure chamber is fixedly connected to a cleaning brush. The eccentric ring is fixedly connected to the surface of the spray pipe.

[0014] The airbag is close to the eccentric ring, and the airbag is in an expanded state in the initial state. When the eccentric ring rotates with the spray pipe, it will repeatedly squeeze the airbag. The air pressure inside the squeezed airbag will enter the air pressure chamber and push the piston rod B to move left.

[0015] In the initial state, the bristles of the cleaning brush are close to the top of the wastewater pipe. The piston rod B moves leftward, which drives the cleaning brush to move leftward. When the cleaning brush moves leftward, its bristles will clean the top of the wastewater pipe.

[0016] The working principle and beneficial effects of the present invention are: 1. The present invention is provided with a disassembly and assembly mechanism, so that when the anode and cathode shafts need to be disassembled, the pull rod is pulled sideways to make the arc block leave the slot. At this time, the compression spring will rebound and drive the mounting head to bounce up a short distance, thereby separating the mounting head and the mounting seat. The mounting head and the anode and cathode shafts can then be removed and reinstalled. By aligning the arrow groove on the top of the mounting head with the direction and inserting the mounting seat downward, the arc block will automatically enter the slot, making it impossible for the mounting head to be separated from the mounting seat. The installation and disassembly are simple and convenient for later maintenance.

[0017] 2. The present invention is provided with a rotary spray mechanism, so that when the exhaust gas enters the spray tank, the motor is turned on to drive the rotating shaft to rotate, and the rotation of the rotating shaft drives the spray pipe to rotate. At this time, the suction pipe will extract the liquid in the water storage tank and discharge it to the spray pipe through the outlet pipe for spraying through the rotating gear, gear rod, pressure chamber and other components. The spraying is carried out while the spray pipe rotates, which increases the contact area with the exhaust gas, thereby improving the treatment effect of the exhaust gas.

[0018] 3. The present invention is provided with a cleaning mechanism, so that the motor is turned on to drive the rotating shaft to rotate. When the rotating shaft rotates and drives the spray pipe to rotate, the cleaning brush is driven by the cooperation of the eccentric ring, air bag, air pressure chamber and other components to clean the top of the waste water pipe, thereby preventing dirt from accumulating at the top of the waste water pipe to form a blockage and affecting the subsequent operation of using the waste water pipe to discharge waste liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 It is a three-dimensional front view of the overall structure of the present invention; Figure 2 It is a three-dimensional back view of the overall structure of the present invention; Figure 3 It is a three-dimensional cross-sectional view of the overall structure of the present invention; Figure 4 This is a three-dimensional schematic diagram of the disassembly and assembly mechanism structure of the present invention; Figure 5 For the present invention Figure 4 A magnified view of the structure at point A; Figure 6 This is a three-dimensional schematic diagram of the rotary spray mechanism structure of the present invention; Figure 7 A three-dimensional cross-sectional view of the rotary spray mechanism structure of the present invention; Figure 8 It is a three-dimensional schematic diagram of the cleaning mechanism structure of the present invention.

[0021] In the figure: 1. electrolytic cell; 2. connecting pipe A; 3. pump body; 4. heat exchange tank; 5. spiral heat exchange tube; 8. connecting pipe B; 9. spray tank; 10. waste water pipe; 11. connecting pipe C; 12. treatment tank; 13. feed pipe; 14. exhaust pipe; 15. discharge pipe; 16. water storage tank; 17. disassembly and assembly mechanism; 171. mounting seat; 172. compression spring; 173. groove; 174. telescopic spring; 175. arc block; 176. pull rod; 177. mounting head; 178. arrow Head slot; 179, cathode and anode shafts; 1710, card slot; 18, rotary spray mechanism; 181, motor; 182, rotating shaft; 183, spray pipe; 184, rotating gear; 185, bracket; 186, pressure chamber; 187, return spring; 188, piston rod A; 189, gear rod; 1810, water suction pipe; 1811, water outlet pipe; 19, cleaning mechanism; 191, air pressure chamber; 192, air bag; 193, piston rod B; 194, cleaning brush; 195, eccentric ring. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0023] Example 1 like Figures 1 to 5As shown, this embodiment proposes a cold-rolling wastewater zero-discharge coupled sodium hypochlorite preparation system, which includes an electrolytic cell 1, a heat exchange tank 4, a spray tank 9, a treatment tank 12 and a water storage tank 16. The side of the electrolytic cell 1 is penetrated and fixedly connected with a connecting pipe A2, the middle end of the connecting pipe A2 is provided with a pump body 3, the end of the connecting pipe A2 away from the electrolytic cell 1 is penetrated and fixedly connected with the heat exchange tank 4, the interior of the heat exchange tank 4 is provided with a spiral heat exchange tube 5, the side of the heat exchange tank 4 away from the connecting pipe A2 is penetrated and fixedly connected with a connecting pipe B8, the end of the connecting pipe B8 away from the heat exchange tank 4 is penetrated and fixedly connected with the side of the spray tank 9, and the spray tank 9 is away from the connecting pipe A connecting pipe C11 is passed through and fixedly connected to one side of B8, and an end of the connecting pipe C11 away from the spray tank 9 is passed through and fixedly connected to the top of the treatment tank 12, a waste water pipe 10 is passed through and fixedly connected to the bottom of the spray tank 9, a feed pipe 13 and an air outlet pipe 14 are passed through and fixedly connected to the top of the treatment tank 12, a discharge pipe 15 is passed through and fixedly connected to the bottom of the treatment tank 12, a disassembly mechanism 17 is provided on the top of the electrolytic cell 1, and a rotary spray mechanism 18 and a cleaning mechanism 19 are provided inside the spray tank 9; the disassembly mechanism 17 includes a mounting seat 171 and a mounting head 177, the mounting seat 171 is passed through and fixedly connected to the top of the electrolytic cell 1, and the interior of the mounting seat 171 is provided with The compression spring 172 has a groove 173 on the inner wall of the mounting seat 171, and a telescopic spring 174 is provided inside the groove 173. The interior of the groove 173 is slidably connected to an arc block 175 through the telescopic spring 174. The arc surface of the arc block 175 faces upward, and the horizontal depth of the groove 173 is greater than the horizontal length of the arc block 175. When the arc surface of the arc block 175 is squeezed, it will move into the groove 173. The arc block 175 can be completely retracted into the groove 173. The side of the arc block 175 close to the telescopic spring 174 is fixedly connected to a pull rod 176. The pull rod 176 penetrates and is slidably connected to the side of the mounting seat 171. The top of the mounting head 177 has an arrow mark. Head slot 178, the bottom of the mounting head 177 is provided with a cathode and anode shafts 179, and a card slot 1710 is provided on the side of the mounting head 177. The opening size of the groove 173 is equal to the opening size of the card slot 1710, and half of the arc block 175 is located in the card slot 1710 in the initial state. When the arc block 175 is stuck in the card slot 1710, the mounting head 177 cannot leave the mounting seat 171. The bottom of the mounting head 177 is in conflict with the compression spring 172 in the initial state, and the compression spring 172 is in a compressed state in the initial state. When the compression spring 172 rebounds, it will drive the mounting head 177 to move upward, thereby causing the card slot 1710 to be misaligned with the groove 173.

[0024] In this embodiment, wastewater is discharged into the electrolytic cell 1, and two sets of mounting heads 177 are connected to electricity. Electrolysis reaction is carried out through the anode and cathode shafts 179 at the bottom of the two sets of mounting heads 177. The brine in the electrolytic cell 1 is electrolyzed to generate sodium hypochlorite under the action of the DC electric field. The generated sodium hypochlorite is transported to the heat exchange tank 4 through the connecting pipe A2 and discharged into the spiral heat exchange tube 5 to serve as domestic water. The temperature of the sodium hypochlorite generated by electrolysis heats the domestic water in the spiral heat exchange tube 5, effectively utilizing the waste heat. When assembling the electrolytic cell 1, the pull rod 176 is pulled sideways, and the pull rod 176 drives the arc block 175 to leave the card slot 1710 and retract into the groove 173. At this time, the compression spring 172 rebounds and drives the mounting head 177 to bounce up a short distance. The slot 1710 is misaligned with the groove 173, so that the mounting head 177 and the mounting seat 171 can be separated. Then the mounting head 177 and the anode and cathode shafts 179 can be removed as a whole. When reinstalling, the arrow groove 178 on the top of the mounting head 177 is aligned with the direction and inserted downward into the mounting seat 171. The anode and cathode shafts 179 pass through the mounting seat 171, and the compression spring 172 is gradually compressed. The arc block 175 is initially squeezed and retracted into the groove 173, and the telescopic spring 174 is compressed. When the slot 1710 is fitted with the groove 173, the telescopic spring 174 rebounds and drives the arc block 175 to be stuck in the slot 1710, so that the mounting head 177 cannot be separated from the mounting seat 171, and the installation is completed. The installation and disassembly are simple, and it is convenient for later maintenance.

[0025] Example 2 like Figures 1 to 8As shown, based on the same concept as the above-mentioned embodiment 1, a second embodiment is also proposed. The rotary spraying mechanism 18 includes a motor 181 and a bracket 185. The motor 181 is fixedly installed on the top of the spray tank 9. The motor 181 is fixedly connected to the rotating shaft 182 through its output shaft. The bottom of the rotating shaft 182 is fixedly connected to the spray pipe 183. The surface of the rotating shaft 182 is fixedly connected to the rotating gear 184. The bracket 185 is fixedly connected to the side of the spray tank 9. The top of the bracket 185 is fixedly connected to the pressure chamber 186. The interior of the pressure chamber 186 is provided with a return spring 187. The interior of the pressure chamber 186 is connected to the piston rod A188 through the return spring 187 piston sliding connection. The piston rod A188 is far One end of the pressure chamber 186 is fixedly connected to a gear rod 189, and the teeth on the gear rod 189 are adapted to the teeth on the rotating gear 184, and the rotating gear 184 is an incomplete gear. When the rotating gear 184 rotates and its upper teeth mesh with the teeth on the gear rod 189, the gear rod 189 will be driven to move to the right. The rear end of the pressure chamber 186 passes through and is fixedly connected to a water suction pipe 1810, and the bottom of the pressure chamber 186 passes through and is fixedly connected to a water outlet pipe 1811. Both the water suction pipe 1810 and the water outlet pipe 1811 are provided with a one-way valve. The end of the water suction pipe 1810 away from the pressure chamber 186 passes through and is fixedly connected to the top of the water storage tank 16, and the end of the water outlet pipe 1811 away from the pressure chamber 186 is connected to the spray pipe 183 The bottom of the tank 186 is penetrated and rotatably connected. The one-way valve in the water suction pipe 1810 is one-way conductive toward the interior of the pressure chamber 186, and the one-way valve in the water outlet pipe 1811 is one-way conductive toward the interior of the spray pipe 183. When negative pressure is formed in the pressure chamber 186, the liquid in the water storage tank 16 is sucked into the pressure chamber 186 through the water suction pipe 1810, and when the liquid in the pressure chamber 186 is squeezed, it is discharged to the spray pipe 183 through the water outlet pipe 1811. The cleaning mechanism 19 includes an air pressure chamber 191 and an eccentric ring 195. The air pressure chamber 191 is fixedly connected to the inner bottom of the spray tank 9. One end of the air pressure chamber 191 is provided with an air bag 192, and the other end of the air pressure chamber 191 has an internal piston slidably connected to a piston rod B1. 93. The end of the piston rod B193 away from the air pressure chamber 191 is fixedly connected to a cleaning brush 194. The eccentric ring 195 is fixedly connected to the surface of the spray pipe 183. The airbag 192 is close to the eccentric ring 195, and the airbag 192 is in an expanded state in the initial state. The eccentric ring 195 will repeatedly squeeze the airbag 192 when it rotates with the spray pipe 183. The air pressure inside the airbag 192 will enter the air pressure chamber 191 and push the piston rod B193 to move to the left. The bristles of the cleaning brush 194 are close to the top of the waste water pipe 10 in the initial state. The leftward movement of the piston rod B193 will drive the cleaning brush 194 to move to the left. When the cleaning brush 194 moves to the left, its bristles will clean the top of the waste water pipe 10.

[0026] In this embodiment, the exhaust gas enters the spray tank 9 through the connecting pipe B8, and the motor 181 is turned on. The motor 181 drives the rotating shaft 182 to rotate through its output shaft. The rotation of the rotating shaft 182 drives the spray pipe 183 to rotate, and the rotation of the rotating shaft 182 also drives the rotating gear 184 to rotate. At the beginning, the rotating gear 184 rotates, and its upper teeth engage with the teeth on the gear rod 189 to drive the gear rod 189 to move to the right. The gear rod 189 moves to the right and drives the piston rod A188 to move to the right. The return spring 187 is compressed, and the piston rod A188 moves to the right. The liquid in the pressure chamber 186 is squeezed so that it is discharged into the spray pipe 183 through the outlet pipe 1811 for spraying. When the rotating gear 184 rotates to the toothless part and disengages from the gear rod 189, the return spring 187 rebounds and drives the piston rod A188 and the gear rod 189 to move left to restore. The left movement of the piston rod A188 will form a negative pressure in the pressure chamber 186, thereby sucking the liquid in the water tank 16 into the pressure chamber 186 through the suction pipe 1810, thereby forming a cycle, and spraying is performed while the spray pipe 183 rotates. , which increases the contact area with the exhaust gas, thereby improving the exhaust gas treatment efficiency. The exhaust gas after spraying treatment enters the treatment tank 12 through the connecting pipe C11, and undergoes acid-base neutralization reaction with the high-concentration sodium hydroxide alkaline solution in the treatment tank 12, thereby achieving the purpose of deep purification of NO and SO2 in the exhaust gas. Finally, the completely purified exhaust gas is discharged through the outlet pipe 14. When the spray pipe 183 rotates, it also drives the eccentric ring 195 to rotate. When the eccentric ring 195 rotates with the spray pipe 183, it will repeatedly squeeze the airbag 192, and the airbag 192 is squeezed inside it. The air pressure will enter the air pressure chamber 191 and push the piston rod B193 to move to the left. The left movement of the piston rod B193 will drive the cleaning brush 194 to move to the left. The cleaning brush 194 moves to the left and its bristles will clean the top of the waste pipe 10. When the eccentric ring 195 leaves the airbag 192, the airbag 192 rebounds and the air pressure returns to the airbag 192. At this time, the piston rod B193 drives the cleaning brush 194 to move to the right and restore, preventing dirt from accumulating at the top of the waste pipe 10 to form a blockage and affecting the subsequent operation of using the waste pipe 10 to discharge waste liquid.

[0027] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cold rolling wastewater zero discharge coupled sodium hypochlorite preparation system, characterized in that: The invention comprises an electrolytic cell (1), a heat exchange tank (4), a spray tank (9), a treatment tank (12) and a water storage tank (16), wherein a connecting pipe A (2) passes through and is fixedly connected to the side of the electrolytic cell (1), a pump body (3) is arranged at the middle end of the connecting pipe A (2), an end of the connecting pipe A (2) away from the electrolytic cell (1) passes through and is fixedly connected to the heat exchange tank (4), a spiral heat exchange tube (5) is arranged inside the heat exchange tank (4), a connecting pipe B (8) passes through and is fixedly connected to the side of the heat exchange tank (4) away from the connecting pipe A (2), an end of the connecting pipe B (8) away from the heat exchange tank (4) passes through and is fixedly connected to the side of the spray tank (9), and the spray tank (9) passes through and is fixedly connected to the side of the spray tank (9). A connecting pipe C (11) is passed through and fixedly connected to the side of the spray tank (9) away from the connecting pipe B (8); an end of the connecting pipe C (11) away from the spray tank (9) is passed through and fixedly connected to the top of the treatment tank (12); a waste water pipe (10) is passed through and fixedly connected to the bottom of the spray tank (9); a feed pipe (13) and an air outlet pipe (14) are passed through and fixedly connected to the top of the treatment tank (12); a discharge pipe (15) is passed through and fixedly connected to the bottom of the treatment tank (12); a disassembly mechanism (17) is provided on the top of the electrolytic cell (1); and a rotary spray mechanism (18) and a cleaning mechanism (19) are provided inside the spray tank (9); The disassembly and assembly mechanism (17) comprises a mounting seat (171) and a mounting head (177); the mounting seat (171) penetrates through and is fixedly connected to the top of the electrolytic cell (1); a compression spring (172) is arranged inside the mounting seat (171); a groove (173) is provided on the inner side wall of the mounting seat (171); a telescopic spring (174) is arranged inside the groove (173); an arc block (175) is slidably connected inside the groove (173) via the telescopic spring (174); a pull rod (176) is fixedly connected to a side of the arc block (175) close to the telescopic spring (174); the pull rod (176) penetrates through and is slidably connected to the side of the mounting seat (171); an arrow groove (178) is provided on the top of the mounting head (177); a cathode and anode shafts (179) are provided at the bottom of the mounting head (177); and a clamping groove (1710) is provided on the side of the mounting head (177).

2. The cold rolling wastewater zero discharge coupled sodium hypochlorite preparation system according to claim 1 is characterized in that: The opening size of the groove (173) is equal to the opening size of the clamping slot (1710), and one half of the arc block (175) is located in the clamping slot (1710) in the initial state.

3. The cold rolling wastewater zero discharge coupled sodium hypochlorite preparation system according to claim 2 is characterized in that: The arc surface of the arc block (175) faces upwards, and the transverse depth of the groove (173) is greater than the transverse length of the arc block (175).

4. The cold rolling wastewater zero discharge coupled sodium hypochlorite preparation system according to claim 3 is characterized in that: In an initial state, the bottom of the mounting head (177) contacts the compression spring (172), and the compression spring (172) is in a compressed state in an initial state.

5. The cold rolling wastewater zero discharge coupled sodium hypochlorite preparation system according to claim 4 is characterized in that: The rotary spray mechanism (18) comprises a motor (181) and a bracket (185); the motor (181) is fixedly mounted on the top of the spray tank (9); the motor (181) is fixedly connected to a rotating shaft (182) via its output shaft; the bottom of the rotating shaft (182) is fixedly connected to a spray pipe (183); the surface of the rotating shaft (182) is fixedly connected to a rotating gear (184); the bracket (185) is fixedly connected to a side of the spray tank (9); the top of the bracket (185) is fixedly connected to a pressure chamber (186); a return spring (187) is provided inside the pressure chamber (186); the inside of the pressure chamber (186) is retracted by the return spring (187); The piston is slidably connected to a piston rod A (188); one end of the piston rod A (188) away from the pressure chamber (186) is fixedly connected to a gear rod (189); a water suction pipe (1810) is passed through and fixedly connected to the rear end of the pressure chamber (186); a water outlet pipe (1811) is passed through and fixedly connected to the bottom of the pressure chamber (186); both the water suction pipe (1810) and the water outlet pipe (1811) are provided with a one-way valve inside; one end of the water suction pipe (1810) away from the pressure chamber (186) is passed through and fixedly connected to the top of the water storage tank (16); and one end of the water outlet pipe (1811) away from the pressure chamber (186) is passed through and rotatably connected to the bottom of the spray pipe (183).

6. The cold rolling wastewater zero discharge coupled sodium hypochlorite preparation system according to claim 5 is characterized in that: The teeth on the gear rod (189) are matched with the teeth on the rotating gear (184), and the rotating gear (184) is an incomplete gear.

7. The cold rolling wastewater zero discharge coupled sodium hypochlorite preparation system according to claim 6 is characterized in that: The one-way valve in the water suction pipe (1810) is one-way conductive toward the interior of the pressure chamber (186), and the one-way valve in the water outlet pipe (1811) is one-way conductive toward the interior of the spray pipe (183).

8. The cold rolling wastewater zero discharge coupled sodium hypochlorite preparation system according to claim 7 is characterized in that: The cleaning mechanism (19) comprises an air pressure chamber (191) and an eccentric ring (195); the air pressure chamber (191) is fixedly connected to the inner bottom of the spray tank (9); an air bag (192) is provided at one end of the air pressure chamber (191); an internal piston at the other end of the air pressure chamber (191) is slidably connected to a piston rod B (193); an end of the piston rod B (193) away from the air pressure chamber (191) is fixedly connected to a cleaning brush (194); and the eccentric ring (195) is fixedly connected to the surface of the spray pipe (183).

9. The cold rolling wastewater zero discharge coupled sodium hypochlorite preparation system according to claim 8, characterized in that: The airbag (192) is close to the eccentric ring (195), and the airbag (192) is in an expanded state in an initial state.

10. The cold rolling wastewater zero discharge coupled sodium hypochlorite preparation system according to claim 9, characterized in that: In an initial state, the bristles of the cleaning brush (194) are close to the top of the wastewater pipe (10).

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