Turbid circulating cooling water treatment system for steel plate heat treatment

Abstract

The invention provides a turbid circulating cooling water treatment system for steel plate heat treatment, and belongs to the technical field of turbid circulating cooling water treatment.The turbid circulating cooling water treatment system for steel plate heat treatment comprises a water supply unit, an adjusting and lifting unit, a filtering unit and a wastewater treatment unit; turbid circulating cold water becomes turbid circulating hot water after being utilized by the heat treatment quenching system and is collected to the adjusting and lifting unit, the turbid circulating hot water is lifted to the filtering unit through the adjusting and lifting unit, and the turbid circulating hot water is filtered by the filtering unit and then returns to the water supply unit to be cooled for recycling; backwashing waste water generated by the filtering unit and self-cleaning filtering device sewage generated by the water supply unit are recycled to the waste water treatment unit, are settled and clarified in the waste water treatment unit and then are conveyed back to the water supply unit, turbid circulating cooling water matched with steel plate heat treatment is treated and recycled, the water discharge amount is reduced, and the energy consumption is reduced. The repeated utilization rate of water resources is improved, and the heat treatment cooling water cost is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of turbid ring cooling water treatment, and specifically relates to a turbid ring cooling water treatment system for heat treatment of steel plates. Background Art

[0002] The steel industry is a major water user, with water consumption accounting for 10% of the total industrial water consumption and wastewater discharge accounting for 14% of the total industrial wastewater discharge. The steel plate heat treatment production line is an important part of the steel production line, and its supporting turbid ring cooling water treatment system is particularly important. After the quenching process, the cooling water carries iron oxide scale and can only be recycled after filtration; a large amount of backwash wastewater is generated during the filtration process, resulting in a large amount of wastewater discharged during the heat treatment process and high water consumption. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] In view of this, according to an embodiment of the present application, a steel plate heat treatment turbid ring cooling water treatment system is proposed, comprising:

[0005] A water supply unit, the water supply unit is connected with the heat treatment quenching system, and the water supply unit provides turbid ring cold water for the heat treatment quenching system;

[0006] The regulating lifting unit is connected with the heat treatment quenching system, and the regulating lifting unit receives the turbid hot water generated by the heat treatment quenching system;

[0007] The filter unit is connected with the regulating and lifting unit, and the filter unit filters the turbid hot water discharged from the regulating and lifting unit; the filter unit is connected with the water supply unit, and the water supply unit receives the filtered water produced by the filter unit;

[0008] The wastewater treatment unit is connected with the filtering unit, and the wastewater treatment unit receives the backwash wastewater generated by the filtering unit; the wastewater treatment unit is connected with the water supply unit, and the wastewater treatment unit receives the wastewater from the water supply unit, and the water supply unit receives the treated water from the wastewater treatment unit.

[0009] In a feasible implementation manner, the water supply unit is connected to the regulating and lifting unit, and the regulating and lifting unit receives overflow water and drain water generated by the water supply unit.

[0010] In a feasible implementation manner, the water supply unit includes:

[0011] The water absorption tank is connected with the regulating and lifting unit, and the regulating and lifting unit receives the overflow water and the emptied water generated by the water absorption tank; the water absorption tank is connected with the wastewater treatment unit, and the wastewater treatment unit receives the dirt inside the water absorption tank, and the water absorption tank receives the treated water produced by the wastewater treatment unit;

[0012] A cooling tower is arranged above the water absorption pool, the cooling tower is connected with the filtering unit, and the cooling tower receives the filtered water produced by the filtering unit;

[0013] A water supply pipe group, the input end of which is connected to the water absorption tank, the output end of which is connected to the heat treatment quenching system, and a self-cleaning filter device is provided on the water supply pipe group to filter the turbid cold water delivered to the heat treatment quenching system; the output end of the water supply pipe group is also connected to the wastewater treatment unit to deliver the filtered dirt to the wastewater treatment unit;

[0014] A reflux pipe group, wherein the input end of the reflux pipe group is connected to the water supply pipe group, and the output end of the reflux pipe group is connected to the water absorption pool;

[0015] A slow-release antiscalant dosing device, the slow-release antiscalant dosing device is connected to the water absorption tank;

[0016] A bactericidal algaecide dosing device, the bactericidal algaecide dosing device is connected to the water absorption tank;

[0017] A water supply pipe is connected to the water absorption pool, and the water supply pipe adds new water to the water absorption pool.

[0018] In a feasible implementation, the water supply pipe group includes a first pipe group and a second pipe group, the first pipe group and the second pipe group are arranged in parallel; an overpressure relief valve is arranged on the first pipe group, and the overpressure relief valve is used to release the internal pressure of the first pipe group;

[0019] The return pipe group includes a first return pipe and a second return pipe, the first return pipe is arranged on the first pipe group, and the second return pipe is arranged on the second pipe group;

[0020] The internal pressure of the first tube group is greater than the internal pressure of the second tube group.

[0021] In a feasible implementation, the regulating and lifting unit receives the vent water produced by the filtering unit;

[0022] The regulating and lifting unit is communicated with the water supply unit, and the regulating and lifting unit receives overflow water and drain water generated by the water supply unit.

[0023] In a feasible implementation manner, adjusting the lifting unit includes:

[0024] The iron oxide groove is connected with the heat treatment quenching system, and the iron oxide groove receives the turbid hot water generated by the heat treatment quenching system;

[0025] The regulating tank is connected to the iron oxide groove; the regulating tank is connected to the filter unit, and the regulating tank receives the filtered and emptied water of the filter unit; the regulating tank is connected to the water supply unit, and the regulating tank receives the overflow water and emptied water generated by the water supply unit;

[0026] A hot water supply pipeline, the input end of the hot water supply pipeline is connected to the regulating tank, and the output end of the hot water supply pipeline is connected to the filtering unit; a hot water lifting pump is provided on the hot water supply pipeline to transport the turbid hot water in the hot water supply pipeline to the filtering unit;

[0027] A hot water return pipe, the input end of which is connected to the hot water supply pipeline, and the output end of which is connected to the regulating tank.

[0028] In a feasible implementation, the filter unit is connected to the regulating and lifting unit, which receives the drain water produced by the filter unit; the filter unit is connected to the water supply unit, which receives the turbid cold water discharged from the water supply unit to wash the filter unit.

[0029] In a feasible embodiment, the filtering unit includes:

[0030] The filter is connected with the regulating and lifting unit through the filter water inlet end, and the filter receives the turbid hot water delivered by the regulating and lifting unit; the filter is connected with the wastewater treatment unit through the backwash drainage end, and the backwash drainage end delivers the backwash wastewater generated by the filter to the wastewater treatment unit;

[0031] The filter is connected to the regulating and lifting unit through the filter venting end, so as to transport the maintenance venting water to the regulating and lifting unit through the filter venting end; the filter is connected to the water supply unit through the filter outlet end, and the filter outlet end transports the filtered turbid hot water to the water supply unit;

[0032] A backwash water supply pipeline, the input end of which is connected to the water supply unit, and the output end of which is connected to the filter; a backwash water supply pump is provided on the backwash water supply pipeline to transport the turbid ring cold water in the water supply unit to the filter to wash the filter;

[0033] The air storage tank is connected with the filter through an air washing inlet end, and the air washing inlet end conveys air to the filter to air wash the filter.

[0034] In one possible embodiment, the wastewater treatment unit comprises:

[0035] The backwash collection tank is connected to the water supply unit, and receives the sewage discharged from the self-cleaning filter device of the water supply unit; the backwash collection tank is connected to the filter unit, and receives the backwash drainage of the filter unit;

[0036] A clarifier, wherein the input end of the clarifier is connected to the backwash collection tank through a wastewater supply assembly, and a wastewater lifting pump is provided on the wastewater supply assembly to transport the sewage in the backwash collection tank to the clarifier; the first output end of the clarifier is connected to the water supply unit to output clear liquid to the water supply unit;

[0037] A sludge drying tank, which is connected to the second output end of the clarifier, and receives the sludge generated by the clarifier;

[0038] The sewage collection tank has an input end connected to the water supply unit, and receives sewage from the water supply unit; and an output end of the sewage collection tank is connected to a drainage point through a sewage pump.

[0039] In a feasible embodiment, the wastewater treatment unit further comprises:

[0040] A PAC dosing device, the PAC dosing device is connected to the wastewater supply component;

[0041] The PAM dosing device is connected with the backwash collection tank.

[0042] Compared with the prior art, the present invention provides a steel plate heat treatment turbid ring cooling water treatment system with the following beneficial effects:

[0043] The steel plate heat treatment turbid ring cooling water treatment system provided in the embodiment of the present application includes a water supply unit, a regulating and lifting unit, a filtering unit and a wastewater treatment unit. The turbid ring cold water is supplied to the heat treatment quenching system by the water supply unit. The turbid ring cold water is converted into turbid ring hot water after being used in the heat treatment quenching system and collected in the regulating and lifting unit. The turbid ring hot water is lifted to the filtering unit by the regulating and lifting unit. The turbid ring hot water is filtered by the filtering unit and then returned to the water supply unit for cooling and recycling. The filtered water and wastewater of the filtering unit are recovered to the wastewater treatment unit, and after precipitation and clarification in the wastewater treatment unit, they are transported back to the water supply unit. By treating and recycling the turbid ring cooling water supporting the steel plate heat treatment, the amount of external water discharged is reduced, the reuse rate of water resources is improved, and the cost of water for heat treatment cooling is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0045] Figure 1 A schematic structural diagram of a turbid ring cooling water treatment system for heat treatment of steel plates according to an embodiment of the present application;

[0046] Figure 2 A schematic structural diagram of a water supply unit of a turbid ring cooling water treatment system for heat treatment of steel plates according to an embodiment of the present application;

[0047] Figure 3A schematic structural diagram of a regulating and lifting unit of a turbid ring cooling water treatment system for heat treatment of steel plates according to an embodiment of the present application;

[0048] Figure 4 A schematic structural diagram of a filter unit of a turbid ring cooling water treatment system for heat treatment of steel plates according to an embodiment of the present application;

[0049] Figure 5 A schematic structural diagram of a wastewater treatment unit of a turbid ring cooling water treatment system for heat treatment of steel plates according to an embodiment of the present application;

[0050] in, Figures 1 to 5 The corresponding relationship between the reference numerals and component names in the figure is:

[0051] 11. Water supply unit; 12. Heat treatment quenching system; 13. Adjustment and lifting unit; 14. Filtration unit; 15. Wastewater treatment unit;

[0052] 111. Water absorption pool; 112. Cooling tower; 113. Water supply pipe group; 114. Return pipe group; 115. Slow-release antiscalant dosing device; 116. Bactericidal algaecide dosing device; 117. Water supply pipe; 118. Self-cleaning filter device;

[0053] 1111, overflow venting end; 1112, water absorption pool sewage discharge end; 1121, cooling tower evaporation end; 1122, self-cleaning filter device sewage discharge;

[0054] 1131, first tube group; 1132, second tube group; 1141, first return pipe; 1142, second return pipe;

[0055] 131. Iron oxide groove; 132. Regulating tank; 133. Hot water supply pipeline; 134. Hot water return pipe; 135. Hot water lifting pump;

[0056] 141. Filter; 142. Backwash water supply pipeline; 143. Air storage tank; 144. Backwash water supply pump;

[0057] 1411, filter inlet end; 1412, filter outlet end; 1413, backwash water inlet end; 1414, backwash drainage end; 1415, filter vent end; 1416, air wash air inlet end;

[0058] 151. Backwash collection tank; 152. Clarifier; 153. Sludge dry residue tank; 154. Sewage collection tank; 155. Wastewater supply assembly; 156. Wastewater lifting pump; 157. Drainage point; 158. PAC dosing device; 159. PAM dosing device;

[0059] 1531. Sludge pool; 1532. Dry residue pool. DETAILED DESCRIPTION

[0060] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0062] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0063] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application.

[0064] like Figure 1As shown, according to the embodiment of the present application, a steel plate heat treatment turbid ring cooling water treatment system is proposed, including: a water supply unit 11, a regulating and lifting unit 13, a filtering unit 14 and a wastewater treatment unit 15; the water supply unit 11 is connected to the heat treatment quenching system 12, and the water supply unit 11 provides turbid ring cold water for the heat treatment quenching system 12; the regulating and lifting unit 13 is connected to the heat treatment quenching system 12, and the regulating and lifting unit 13 receives the turbid ring hot water generated by the heat treatment quenching system 12; the filtering unit 14 is connected to the regulating and lifting unit The filter unit 14 is connected to the water supply unit 11, and the water supply unit 11 receives the filtered water produced by the filter unit 14; the wastewater treatment unit 15 is connected to the filter unit 14, and the wastewater treatment unit 15 receives the backwash wastewater produced by the filter unit 14; the wastewater treatment unit 15 is connected to the water supply unit 11, and the wastewater treatment unit 15 receives the sewage produced by the water supply unit 11, and the water supply unit 11 receives the treated water produced by the wastewater treatment unit 15.

[0065] The steel plate heat treatment turbid ring cooling water treatment system provided in the embodiment of the present application includes a water supply unit 11, a regulating and lifting unit 13, a filtering unit 14 and a wastewater treatment unit 15. The turbid ring cold water is supplied from the water supply unit 11 to the heat treatment quenching system 12. The turbid ring cold water is converted into turbid ring hot water after being used by the heat treatment quenching system 12 and collected in the regulating and lifting unit 13. The turbid ring hot water is lifted to the filtering unit 14 by the regulating and lifting unit 13. The turbid ring hot water is filtered by the filtering unit 14 and then returned to the water supply unit 11 for cooling and recycling. The filtered water and wastewater of the filtering unit 14 are recovered to the wastewater treatment unit 15, and after precipitation and clarification in the wastewater treatment unit 15, they are transported back to the water supply unit 11. By treating and recycling the turbid ring cooling water supporting the steel plate heat treatment, the amount of external water discharged is reduced, the reuse rate of water resources is improved, and the cost of water for heat treatment cooling is reduced.

[0066] like Figure 2 As shown, in a feasible implementation manner, the water supply unit 11 is connected to the regulating and lifting unit 13 , and the regulating and lifting unit 13 receives overflow water and drain water generated by the water supply unit 11 .

[0067] In this technical solution, the regulating lifting unit 13 is connected to the water supply unit 11, so that the overflow water of the water supply unit 11 and the drain water during maintenance can be collected by the regulating lifting unit 13, so as to further save water and improve the utilization rate of water resources.

[0068] like Figure 2As shown, in a feasible embodiment, the water supply unit 11 includes: a water absorption tank 111, a cooling tower 112, a water supply pipe group 113, a return pipe group 114, a slow-release antiscalant dosing device 115, a bactericidal algaecide dosing device 116 and a water supply pipe 117; the water absorption tank 111 is connected to the regulating and lifting unit 13, and the regulating and lifting unit 13 receives the overflow water and the drain water generated by the water absorption tank 111; the water absorption tank 111 is connected to the wastewater treatment unit 15, and the wastewater treatment unit 15 receives the dirt inside the water absorption tank 111, and the water absorption tank 111 receives the treated water produced by the wastewater treatment unit 15; the cooling tower 112 is arranged above the water absorption tank 111, and the cooling tower 112 is connected to the filter unit 14, and the cooling tower 112 receives the filtered water produced by the filter unit 14; the input end of the water supply pipe group 113 is connected to the water absorption tank 111 is connected, the output end of the water supply pipe group 113 is connected to the heat treatment quenching system 12, and the water supply pipe group 113 is provided with a self-cleaning filter device 118 to filter the turbid ring cold water transported to the heat treatment quenching system 12, and the self-cleaning filter device 118 discharges sewage into the wastewater treatment unit 15 for treatment; the output end of the water supply pipe group 113 is also connected to the wastewater treatment unit 15 to transport the filtered dirt to the wastewater treatment unit 15; the input end of the reflux pipe group 114 is connected to the water supply pipe group 113, and the output end of the reflux pipe group 114 is connected to the water absorption tank 111; the slow-release antiscalant dosing device 115 is connected to the water absorption tank 111; the bactericidal algaecide dosing device 116 is connected to the water absorption tank 111; the water supply pipe 117 is connected to the water absorption tank 111, and the water supply pipe 117 adds new water to the water absorption tank 111.

[0069] In this technical solution, the water absorption tank 111 is used to collect turbid circulating cold water, and the cooling tower 112 is arranged above the water absorption tank 111, so that the filtered water circulating back from the filtering unit 14 is cooled by the cooling tower 112 before entering the water absorption tank 111; the overflow water and the drain water of the water absorption tank 111 are connected to the regulating and lifting unit 13, so that the overflow water of the water absorption tank 111 and the drain water during maintenance are collected and reused, so as to further improve the utilization rate of water resources; the water supply pipe group 113 draws water from the water absorption tank 111, and by arranging the return pipe group 114 on the water supply pipe group 113, when the instantaneous change of water supply is large, part of the turbid circulating water flows back to the water absorption tank 111 through the return pipe group 114, so as to improve the water volume regulation capacity of the treatment system, and avoid the overload and heating of the motor of the water pump on the return pipe group 114 due to the pressure buildup, and burn the motor wire circle, thereby ensuring the operation of the water supply unit 11 and the stability of the water supply; after the turbid circulating cold water in the reflux pipe group 114 is filtered by the self-cleaning filter device 118, the clear liquid enters the heat treatment quenching system 12 to quench and cool the steel plate, and the turbid liquid enters the wastewater treatment unit 15 for further treatment and reuse to reduce the sewage discharge; the slow-release scale inhibitor dosing device 115 and the bactericidal algaecide dosing device 116 regularly add slow-release scale inhibitors and bactericidal algaecides to the water absorption tank 111, respectively, to treat the turbid circulating cold water in the water absorption tank 111 to maintain the good operation state of the turbid circulating water system, delay equipment corrosion, and reduce the amount of sewage discharged by the turbid circulating water system. The dirt at the bottom of the water absorption tank 111 is collected in the wastewater treatment unit 15 to wait for external discharge; the water supply pipe 117 is used to add turbid circulating cold water to the water absorption tank 111 to ensure sufficient water volume.

[0070] In this technical solution, turbid circulating water is collected through the iron oxide groove 131 to the regulating tank 132 for buffering and regulating the water volume to cope with the working conditions of extremely large instantaneous water volume changes during the heat treatment process of the steel plate; the hot water booster pump 135 uses multiple variable frequency water pumps, and the water supply pipe group 113 is provided with a bypass return pipe group 114 to adapt to the instantaneous water volume changes of the turbid circulating water return water, avoid the impact of the drastic changes in instantaneous water consumption during the heat treatment of the steel plate on the turbid circulating water system, maintain the normal working water level in the regulating tank 132, improve the water supply stability, and help to improve the quality of the steel plate after heat treatment and quenching.

[0071] Furthermore, a plurality of cooling towers 112 are disposed above the water absorption pool 111 to ensure a cooling effect on the circulating hot water.

[0072] As a preferred solution, cooling tower 112 uses multiple variable frequency types, which can cope with the cooling conditions of large instantaneous water volume changes in cooling water for heat treatment of steel plates. It can ensure that the water temperature is stable at 33-35°C in both summer and winter, maximize energy saving and consumption reduction, reduce cooling costs, and at the same time ensure that the turbid ring cold water temperature is stable and meets the water temperature requirements of steel plate heat treatment, avoid equipment failure caused by unstable cooling water temperature control, and then lead to a decrease in production efficiency, affecting the quality and output of steel plates.

[0073] As a preferred solution, the cooling tower 112 is of the mist-eliminating type. The evaporation and wind loss of the cooling tower 112 is reduced by about 23% to 30% compared with the ordinary cooling tower 112, which significantly reduces the water consumption in the heat treatment process.

[0074] like Figure 2 As shown, in a feasible embodiment, the water supply pipe group 113 includes a first pipe group 1131 and a second pipe group 1132, and the first pipe group 1131 and the second pipe group 1132 are arranged in parallel; an overpressure relief valve is arranged on the first pipe group 1131, and the overpressure relief valve is used to release the internal pressure of the first pipe group 1131; the return pipe group 114 includes a first return pipe 1141 and a second return pipe 1142, the first return pipe 1141 is arranged on the first pipe group 1131, and the second return pipe 1142 is arranged on the second pipe group 1132; wherein, the internal pressure of the first pipe group 1131 is greater than the internal pressure of the second pipe group 1132.

[0075] In this technical solution, the water supply pipe group 113 includes a high-pressure pipe group and a low-pressure pipe group. The internal pressure of the first pipe group 1131 is greater than the internal pressure of the second pipe group 1132. The first pipe group 1131 is a high-pressure pipe group, and the second pipe group 1132 is a low-pressure pipe group. The first pipe group 1131 and the second pipe group 1132 both absorb water from the water absorption pool 111. The water supply pressure of the high-pressure pipe group is as high as 1.1MPa, and the instantaneous water consumption changes greatly. By providing an overpressure relief valve on the high-pressure pipe group, the pressure in the high-pressure pipe group is adjusted in time to stabilize the water supply of the high-pressure pipe group, thereby avoiding the water hammer phenomenon caused by the large instantaneous water volume change of the high-pressure pipe group, and avoiding the pipeline vibration caused by unstable water supply, thereby reducing the safety hazards of system operation. At the same time, a first return pipe 1141 is provided on the first pipe group 1131. When the water supply of the first pipe group 1131 is instantly reduced, the first pipe group 11 Part of the turbid circulating water in 31 flows back to the water absorption tank 111 to prevent the motor of the water pump of the first pipe group 1131 from overloading and heating due to the pressure buildup, thereby burning the motor coil; the water supply pressure of the second pipe group 1132 is 0.6MPa, and the instantaneous water consumption changes greatly. A second return pipe 1142 is arranged on the second pipeline. When the water supply of the second pipe group 1132 decreases significantly instantaneously, part of the turbid circulating water in the second pipe group 1132 flows back to the water absorption tank 111 to prevent the motor of the water pump of the second pipe group 1132 from overloading and heating due to the pressure buildup, thereby burning the motor coil. The excess turbid circulating water of the high-pressure pipe group and the low-pressure pipe group flows back independently, so that the first pipe group 1131 and the second pipe group 1132 can respectively quickly adapt to the instantaneous water volume change of the turbid circulating water return water, ensure the normal working water level in the regulating and lifting unit 13, improve the water supply stability, ensure the stability of the treatment system operation, and help to improve the quality of the steel plate after quenching treatment.

[0076] Furthermore, in order to ensure the water quality of the circulating cooling water supply, a first water pump is provided on the first pipe group 1131, and a second water pump is provided on the second pipe to separately control the water supply at the high-pressure end and the low-pressure end of the turbid ring cold water, so as to adapt to the different water consumption of the heat treatment quenching system 12.

[0077] Furthermore, in order to ensure the water quality of the circulating cooling water supply, a first self-cleaning filter device is set on the first pipe group 1131, and a second self-cleaning filter device is set on the second pipe group 1131 to fully filter the turbid ring cooling water supply and remove suspended matter and turbidity in the turbid ring water to ensure that the water quality of the turbid ring cooling water meets the requirements for steel plate pretreatment and avoid equipment failure caused by unstable water quality control, which in turn leads to a decrease in production efficiency and affects the quality and output of steel plates.

[0078] like Figure 3 As shown, in a feasible implementation, the regulating lifting unit 13 receives the drain water generated by the filtering unit 14 ; the regulating lifting unit 13 is connected to the water supply unit 11 , and the regulating lifting unit 13 receives the overflow water and drain water generated by the water supply unit 11 .

[0079] In this technical solution, the regulating and lifting unit 13 recovers the drain water generated during the maintenance of the filtering unit 14. The regulating and lifting unit 13 also recovers the overflow water and drain water generated by the water supply unit 11, so that the turbid circulating water is collected by the regulating unit and then uniformly lifted to the filtering unit 14 for filtering treatment, thereby saving water and improving the utilization rate of water resources.

[0080] like Figure 3 As shown, in a feasible embodiment, the regulating and lifting unit 13 includes: an oxidized iron groove 131, a regulating tank 132, a hot water supply pipeline 133 and a hot water return pipe 134; the oxidized iron groove 131 is connected to the heat treatment quenching system 12, and the oxidized iron groove 131 receives the turbid hot water generated by the heat treatment quenching system 12; the regulating tank 132 is connected to the oxidized iron groove 131; the regulating tank 132 is connected to the filter unit 14, and the regulating tank 132 receives the filtered and emptied water of the filter unit 14; the regulating tank 132 is connected to the water supply The hot water supply pipe 133 is connected to the regulating tank 132, and the output end of the hot water supply pipe 133 is connected to the filtering unit 14; a hot water lifting pump 135 is provided on the hot water supply pipe 133 to transport the turbid hot water in the hot water supply pipe 133 to the filtering unit 14; the input end of the hot water return pipe 134 is connected to the hot water supply pipe 133, and the output end of the hot water return pipe 134 is connected to the regulating tank 132.

[0081] In this technical solution, the cooling water after being used by the heat treatment quenching machine is collected through the iron oxide groove 131 and flows to the regulating tank 132 by gravity. The regulating tank 132 is used to store the cooling water for regulation and buffering, so as to cope with various working conditions with large fluctuations in the turbidity cycle water volume to ensure the stability of the water supply volume; the hot water lifting pump 135 is a plurality of variable frequency water pumps, and the cooling water is lifted by the hot water lifting pump 135 and enters the filtering unit 14 from the hot water supply pipeline 133 for filtering treatment; a hot water return pipe 134 is arranged on the hot water supply pipeline 133, and the hot water return pipe 134 is used to return the hot water to the turbidity cycle. The water condition and the liquid level condition of the water absorption tank 111 in the water supply unit 11 adjust the amount of water lifted by the hot water lifting pump 135, and the excess cooling water in the hot water pipe supply pipe flows back to the regulating tank 132 to ensure the stable operation of the turbid circulating water system; the regulating tank 132 has a large regulating volume, which can accommodate the overflow water and drain water of the overflow drain end 1111 of the water absorption tank 111 in the water supply unit 11, and can also accommodate the drain water of the drain end of the filter 141 when the filter unit 14 is overhauled, thereby saving water in the heat treatment process and effectively reducing the water consumption of the heat treatment process.

[0082] like Figure 4 As shown, in a feasible embodiment, the filter unit 14 is connected to the regulating and lifting unit 13, and the regulating and lifting unit 13 receives the drain water generated by the filter unit 14; the filter unit 14 is connected to the water supply unit 11, and the filter unit 14 receives the turbid ring cold water supplied by the water supply unit 11 to wash the filter unit 14.

[0083] In this technical solution, all the turbid ring hot water of the regulating lifting unit 13 enters the filter unit 14 through the inlet end of the filter 141 for filtration to remove iron oxide, suspended matter, etc. in the turbid ring return water to ensure the water quality of the turbid ring water. After filtration, the turbid ring hot water enters the cooling tower 112 of the water supply unit 11 from the outlet end of the filter unit 14 for cooling.

[0084] like Figure 4As shown, in a feasible embodiment, the filter unit 14 includes: a filter 141, a backwash water supply pipeline 142 and an air storage tank 143; the filter 141 is connected to the regulating and lifting unit 13, and the filter 141 receives the turbid ring hot water delivered by the regulating and lifting unit 13; the filter 141 is connected to the wastewater treatment unit 15 through the backwash drainage end 1414, and the backwash drainage end 1414 delivers the backwash wastewater generated by the filter 141 to the wastewater treatment unit 15; the filter 141 is connected to the regulating and lifting unit 13 through the venting end of the filter 141, so as to deliver the maintenance venting water to the regulating and lifting unit 13 through the venting end of the filter 141; the filter 14 1 is connected with the water supply unit 11 through the outlet end of the filter 141, and the outlet end of the filter 141 transmits filtered turbid ring hot water to the water supply unit 11; the input end of the backwash water supply pipeline 142 is connected with the water supply unit 11, and the output end of the backwash water supply pipeline 142 is connected with the filter 141; a backwash water supply pump 144 is provided on the backwash water supply pipeline 142 to transmit the turbid ring cold water in the water supply unit 11 to the filter 141 to wash the filter 141; the air storage tank 143 is connected with the filter 141 through the air washing air inlet end 1416, and the air washing air inlet end 1416 transmits air to the filter 141 to air wash the filter 141.

[0085] In this technical solution, a plurality of filters 141 are arranged in parallel. After the filter 141 has worked for a period of time, the water pressure difference between the inlet and outlet of the filter 141 increases, and the filter 141 enters the backwash state in turn. Compressed air enters the air washing air inlet end 1416 of the filter 141 from the air storage tank 143 to air wash the filter 141. After the air washing is completed, the backwash water supply pipeline 142 draws water from the water suction tank 111 of the water supply unit 11 through the backwash water supply pump 144, and the backwash water enters the backwash water inlet end 1413 of the filter 141 to wash the filter 141. The backwash drainage enters the wastewater treatment unit 15 through the backwash drainage end 1414 of the filter 141 for further treatment, thereby further reducing the amount of external drainage of the steel plate heat treatment.

[0086] like Figure 5As shown, in a feasible embodiment, the wastewater treatment unit 15 includes: a backwash collection tank 151, a clarifier 152, a sludge dry residue tank 153 and a sewage collection tank 154; the backwash collection tank 151 is connected to the water supply unit 11, and the backwash collection tank 151 receives the sewage discharged by the self-cleaning filter device 118 of the water supply unit 11; the backwash collection tank 151 is connected to the filter unit 14, and the backwash collection tank 151 receives the backwash drainage of the filter unit 14; the input end of the clarifier 152 is connected to the backwash collection tank 151 through the wastewater supply component 155, and the wastewater supply component 15 5 is provided with a wastewater lifting pump 156 to transport the sewage from the backwash collection tank 151 to the clarifier 152; the first output end of the clarifier 152 is connected to the water supply unit 11 to output clear liquid to the water supply unit 11; the sludge drying tank 153 is connected to the second output end of the clarifier 152, and the sludge drying tank 153 receives the sludge generated by the clarifier 152; the input end of the sewage collection tank 154 is connected to the water supply unit 11, and the sewage collection tank 154 receives the sewage from the water supply unit 11; the output end of the sewage collection tank 154 is connected to the drainage point 157 through the sewage pump.

[0087] In this technical solution, the clarifier 152 is arranged above the backwash collection tank 151, and a backwash wastewater lifting pump 156 is arranged in the backwash collection tank 151. The backwash collection tank 151 collects the backwash drainage of the filter 141 and the sewage discharged by the self-cleaning filter device 118 of the water supply unit 11. This part of the wastewater is lifted to the clarifier 152 by the backwash wastewater lifting pump 156 for clarification and sedimentation. The violent spiral stirring of the impeller of the backwash wastewater lifting pump 156 makes the wastewater and the treatment agent in the backwash collection tank 151 fully mixed and then clarified. The sludge is precipitated and clarified in the clarifier 152, and the upper clear liquid after precipitation returns to the water absorption tank 111 of the water supply unit 11 through the outlet end of the clarifier 152 for recycling; the sludge precipitated at the bottom of the clarifier 152 is discharged to the sludge drying tank 153 through the sludge discharge end of the clarifier 152, and the middle clear liquid above the precipitation flows back to the backwash collection tank 151, and the remaining sludge is dried in the sludge drying tank 153 to a relatively dry state; the sewage collection tank 154 collects the sewage from the sewage discharge end of the water absorption tank 111 of the water supply unit 11, and discharges it to the drainage point 157 in a centralized manner.

[0088] Furthermore, the sludge drying tank 153 includes a sludge tank 1531 and a drying tank 1532. The sludge is dried in the sludge tank 1531 for a period of time, and then the sludge is manually removed and dried in the drying tank 1532 to allow the sludge to be centrally processed.

[0089] like Figure 5 As shown, in a feasible implementation, the wastewater treatment unit 15 further includes: a PAC dosing device 158 and a PAM dosing device 159 ; the PAC dosing device 158 is connected to the wastewater supply assembly 155 ; and the PAM dosing device 159 is connected to the backwash collection tank 151 .

[0090] In this technical solution, during the lifting process of the wastewater by the backwash wastewater lifting pump 156 to the clarifier 152 for clarification and sedimentation, the PAC dosing device 158 adds PAC coagulant to the backwash wastewater collection tank near the backwash wastewater lifting pump 156. Through the violent spiral stirring action of the lifting pump impeller, the PAC coagulant is fully mixed with the particles in the wastewater, and the double electric layer is compressed and the electric neutralization effect is exerted to destabilize the particles in the backwash wastewater to form fine flocs; the PAM dosing device 159 adds PAM flocculant to the initial section of the wastewater supply component 155. The PAM flocculant plays an adsorption and bridging role in the pipeline to form larger alum flocs, which enter the high-efficiency clarifier 152 for precipitation and clarification, and the backwash wastewater and the sewage discharged from the self-cleaning filter device 118 are further treated, and then the upper layer of clear water is separated after precipitation and clarification in the clarifier 152 and reused to the water supply unit 11, thereby ensuring the water quality of the circulating cooling water, thereby ensuring the quality of the steel plate after heat treatment.

[0091] In this technical solution, the backwash drainage of the filter unit 14 and the sewage of the self-cleaning filter device 118 are collected into the wastewater treatment unit 15, and the coagulant PAC is added to the backwash collection tank 151, and the flocculant PAM is added to the wastewater supply component 155, and then enters the high-efficiency clarifier 152, and the upper layer of clear water is reused to the water supply unit 11, and the sludge of the clarifier 152 is discharged into the sludge drying tank 153, so that the sewage discharge of the turbid ring cooling water treatment system is reduced from 1.63% of the total circulating water volume to 0.47%, which greatly reduces the sewage discharge and effectively improves the utilization rate of water resources.

[0092] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0093] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A steel plate heat treatment turbid ring cooling water treatment system, characterized in that: The steel plate heat treatment turbid ring cooling water treatment system comprises: A water supply unit, the water supply unit is connected to the heat treatment quenching system, and the water supply unit provides turbid ring cold water for the heat treatment quenching system; A regulating and lifting unit, the regulating and lifting unit is connected to the heat treatment quenching system, and the regulating and lifting unit receives the turbid ring hot water generated by the heat treatment quenching system; A filter unit, the filter unit is connected to the regulating and lifting unit, the filter unit filters the turbid hot water discharged from the regulating and lifting unit; the filter unit is connected to the water supply unit, the water supply unit receives the filtered water produced by the filter unit; A wastewater treatment unit, wherein the wastewater treatment unit is connected to the filter unit, and the wastewater treatment unit receives backwash wastewater generated by the filter unit; the wastewater treatment unit is connected to the water supply unit, and the wastewater treatment unit receives wastewater from the water supply unit, and the water supply unit receives treated water from the wastewater treatment unit.

2. A steel plate heat treatment turbid ring cooling water treatment system according to claim 1, characterized in that: The water supply unit is communicated with the regulating and lifting unit, and the regulating and lifting unit receives overflow water and drain water generated by the water supply unit.

3. A steel plate heat treatment turbid ring cooling water treatment system according to claim 2, characterized in that: The water supply unit comprises: A water absorption tank, the water absorption tank is connected to the regulating and lifting unit, the regulating and lifting unit receives overflow water and emptied water generated by the water absorption tank; the water absorption tank is connected to the wastewater treatment unit, the wastewater treatment unit receives dirt inside the water absorption tank, and the water absorption tank receives treated water produced by the wastewater treatment unit; A cooling tower, the cooling tower is arranged above the water absorption pool, the cooling tower is connected to the filtering unit, and the cooling tower receives the filtered water produced by the filtering unit; A water supply pipe group, wherein the input end of the water supply pipe group is connected to the water absorption pool, and the output end of the water supply pipe group is connected to the heat treatment quenching system. The water supply pipe group is provided with a self-cleaning filter device to filter the turbid ring cold water delivered to the heat treatment quenching system; the output end of the water supply pipe group is also connected to the wastewater treatment unit to deliver the filtered dirt to the wastewater treatment unit; A reflux pipe group, wherein the input end of the reflux pipe group is connected to the water supply pipe group, and the output end of the reflux pipe group is connected to the water absorption pool; A slow-release antiscalant dosing device, the slow-release antiscalant dosing device is connected to the water absorption tank; a bactericidal algaecide dosing device, the bactericidal algaecide dosing device being connected to the water absorption pool; A water supply pipe is connected to the water absorption pool, and the water supply pipe replenishes new water into the water absorption pool.

4. A steel plate heat treatment turbid ring cooling water treatment system according to claim 3, characterized in that: The water supply pipe group includes a first pipe group and a second pipe group, the first pipe group and the second pipe group are arranged in parallel; an overpressure relief valve is arranged on the first pipe group, and the overpressure relief valve is used to release the internal pressure of the first pipe group; The return pipe group includes a first return pipe and a second return pipe, the first return pipe is arranged on the first pipe group, and the second return pipe is arranged on the second pipe group; The internal pressure of the first tube group is greater than the internal pressure of the second tube group.

5. A steel plate heat treatment turbid ring cooling water treatment system according to claim 1, characterized in that: The regulating and lifting unit receives the vent water generated by the filtering unit; The regulating and lifting unit is communicated with the water supply unit, and the regulating and lifting unit receives overflow water and drain water generated by the water supply unit.

6. A steel plate heat treatment turbid ring cooling water treatment system according to claim 5, characterized in that: The regulating and lifting unit comprises: An iron oxide groove, the iron oxide groove is connected to the heat treatment quenching system, and the iron oxide groove receives the turbid hot water generated by the heat treatment quenching system; A regulating tank, the regulating tank is connected to the iron oxide groove; the regulating tank is connected to the filter unit, the regulating tank receives the filtered and emptied water of the filter unit; the regulating tank is connected to the water supply unit, the regulating tank receives the overflow water and the emptied water generated by the water supply unit; A hot water supply pipeline, wherein the input end of the hot water supply pipeline is connected to the regulating tank, and the output end of the hot water supply pipeline is connected to the filtering unit; a hot water lifting pump is provided on the hot water supply pipeline to transport the turbid hot water in the hot water supply pipeline to the filtering unit; A hot water return pipe, wherein the input end of the hot water return pipe is connected to the hot water supply pipeline, and the output end of the hot water return pipe is connected to the regulating tank.

7. A steel plate heat treatment turbid ring cooling water treatment system according to claim 1, characterized in that: The filter unit is communicated with the regulating and lifting unit, and the regulating and lifting unit receives the drain water generated by the filter unit; the filter unit is communicated with the water supply unit, and the filter unit receives the turbid cold water discharged from the water supply unit to wash the filter unit.

8. A steel plate heat treatment turbid ring cooling water treatment system according to claim 7, characterized in that: The filtering unit comprises: A filter, wherein the filter is connected to the regulating and lifting unit through a filter water inlet end, and the filter receives the turbid hot water delivered by the regulating and lifting unit; the filter is connected to the wastewater treatment unit through a backwash drainage end, and the backwash drainage end delivers the backwash wastewater generated by the filter to the wastewater treatment unit; The filter is connected to the regulating and lifting unit through the filter venting end, so as to deliver maintenance venting water to the regulating and lifting unit through the filter venting end; the filter is connected to the water supply unit through the filter outlet end, and the filter outlet end delivers filtered turbid hot water to the water supply unit; A backwash water supply pipeline, wherein the input end of the backwash water supply pipeline is connected to the water supply unit, and the output end of the backwash water supply pipeline is connected to the filter; a backwash water supply pump is provided on the backwash water supply pipeline to transport the turbid ring cold water in the water supply unit to the filter to wash the filter; An air storage tank is connected to the filter through an air washing inlet end, and the air washing inlet end conveys air into the filter to air wash the filter.

9. A steel plate heat treatment turbid ring cooling water treatment system according to claim 1, characterized in that: The wastewater treatment unit includes: A backwash collection tank, the backwash collection tank is connected to the water supply unit, the backwash collection tank receives the sewage discharged from the self-cleaning filter device of the water supply unit; the backwash collection tank is connected to the filter unit, the backwash collection tank receives the backwash drainage of the filter unit; A clarifier, wherein the input end of the clarifier is connected to the backwash collection tank through a wastewater supply assembly, and the wastewater supply assembly is provided with a wastewater lift pump to transport the sewage in the backwash collection tank to the clarifier; the first output end of the clarifier is connected to the water supply unit to output clear liquid to the water supply unit; A sludge drying tank, the sludge drying tank is connected to the second output end of the clarifier, and the sludge drying tank receives the sludge generated by the clarifier; A sewage collection tank, the input end of which is connected to the water supply unit, and the sewage collection tank receives sewage from the water supply unit; the output end of the sewage collection tank is connected to a drainage point through a sewage pump.

10. A steel plate heat treatment turbid ring cooling water treatment system according to claim 9, characterized in that: The wastewater treatment unit also includes: A PAC dosing device, the PAC dosing device is in communication with the wastewater supply assembly; A PAM dosing device is connected to the backwash collection tank.

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