Water supply and return system

Abstract

This utility model relates to the field of metal smelting technology, specifically to a water supply and return system. The water supply and return system includes a cooling water jacket and multiple water supply devices. The cooling water jacket includes multiple inlet pipes, which are spaced apart vertically and divided into multiple groups according to their required water supply pressure. Each group of inlet pipes includes multiple inlet pipes. Multiple water supply devices correspond one-to-one with multiple groups of inlet pipes, and the water supply pressure of each water supply device matches the required water supply pressure of its corresponding inlet pipe group. Each water supply device includes a safety water tank and multiple water distribution components. All water distribution components are connected to the safety water tank and are connected one-to-one with the multiple inlet pipes of their respective inlet pipe groups to supply water to the inlet pipes. The water supply and return system of this utility model embodiment can prevent overpressure in the cooling water jacket and improve smelting safety.

Description

Technical Field

[0001] This utility model relates to the field of metal smelting technology, specifically to a water supply and return system. Background Technology

[0002] In non-ferrous metal smelting, the internal temperature of the furnace typically exceeds 1000℃, requiring a cooling water jacket to lower the furnace body and prevent deformation or burn-through. To ensure the safe and stable operation of the smelting process and prevent disruptions due to water or power outages, a safety water tank is usually installed to temporarily supply water to the cooling water jacket, ensuring normal smelting operations.

[0003] However, in related technologies, the cooling water jacket is prone to overpressure when the safety water tank is supplied with water, which affects smelting safety. Utility Model Content

[0004] This utility model is based on the inventor's discovery and understanding of the following facts and problems:

[0005] The inventors discovered that the outlet pipe of the safety water tank in the related technology is connected to the cooling water jacket at the bottom of the kiln. The height of the kiln is usually above 10-20m, and the required pressure of the cooling water jacket at different heights is also different. In order to ensure the required pressure of the upper cooling water jacket of the kiln, the lower cooling water jacket will inevitably be over-pressurized, which will affect the smelting safety.

[0006] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a water supply and return system that can prevent overpressure in the cooling water jacket and improve smelting safety.

[0007] The water supply and return system of this utility model embodiment includes: a cooling water jacket, the cooling water jacket including multiple water inlet pipes, the multiple water inlet pipes being arranged at intervals in the vertical direction and divided into multiple groups according to their required water supply pressure, each group of water inlet pipes including multiple water inlet pipes; multiple water supply devices, the multiple water supply devices corresponding one-to-one with the multiple groups of water inlet pipes, and the water supply pressure of each water supply device matching the required water supply pressure of the water inlet pipe group corresponding to the water supply device, each water supply device including a safety water tank and multiple water distribution components, the multiple water distribution components being connected to the safety water tank, and the multiple water distribution components being connected one-to-one with the multiple water inlet pipes of the water inlet pipe group corresponding to the water supply device to supply water to the water inlet pipes.

[0008] The water supply and return system of this utility model divides multiple water inlet pipes into multiple groups of water inlet pipes according to the different water supply pressures required by the multiple water inlet pipes of the cooling water jacket. By setting multiple water supply devices with different water supply pressures to match the multiple groups of water inlet pipes respectively, the water supply pressure of the water supply device is matched with the water supply pressure required by the water inlet pipe connected to the water supply device. By setting multiple water distribution components to correspond one-to-one with the multiple water inlet pipes in the group of water inlet pipes, the water inlet pipes are ensured to flow smoothly while avoiding overpressure, thereby avoiding overpressure of the cooling water jacket and improving smelting safety.

[0009] In some embodiments, the water supply and return system further includes a cold water tank and a hot water tank. The cooling water jacket includes a plurality of water outlet pipes. The plurality of water outlet pipes are arranged at intervals in the vertical direction and divided into a first group of water outlet pipes and a second group of water outlet pipes. The first group of water outlet pipes is located above the second group of water outlet pipes. The first group of water outlet pipes is connected to the cold water tank, and the second group of water outlet pipes is connected to the hot water tank.

[0010] In some embodiments, the water supply and return system further includes a first return water device and a second return water device, wherein the first return water device is connected between the first set of outlet pipes and the cold water pool, and the second return water device is connected between the second set of outlet pipes and the hot water pool.

[0011] In some embodiments, both the first water return device and the second water return device include a plurality of water return collection components, and both the first group of water outlet pipes and the second group of water outlet pipes include a plurality of water outlet pipes. The plurality of water return collection components are connected one-to-one with the plurality of water outlet pipes of the water outlet pipe group corresponding to the water return device.

[0012] In some embodiments, the water supply and return system further includes a first cooling tower and a second cooling tower, the first cooling tower being connected between the first return water device and the cold water pool, and the second cooling tower being connected between the hot water pool and the cold water pool, the first cooling tower and the second cooling tower being used to cool the return water.

[0013] In some embodiments, the water supply and return system further includes a hot water pump, one end of which is connected to the hot water tank and the other end of which is connected to the second cooling tower.

[0014] In some embodiments, the water supply and return system further includes a water supply main pipe, one end of which is connected to the cold water tank and the other end of which is connected to a plurality of the security water tanks; and / or, the water supply and return system further includes a hot water pump, one end of which is connected to the hot water tank and the other end of which is connected to the cold water tank.

[0015] In some embodiments, the water supply and return system further includes a cold water pump, one end of which is connected to the cold water tank and the other end of which is connected to the main water supply pipe; and / or, at least one of the cold water tank and the hot water tank is equipped with a level gauge.

[0016] In some embodiments, the water supply and return system further includes a flow sensor, a temperature sensor, a pressure sensor, and a regulating valve, wherein the flow sensor, the temperature sensor, the pressure sensor, and the regulating valve are all located on the main water supply pipe.

[0017] In some embodiments, the water supply and return system further includes a controller, which is connected to the hot water pump, the cold water pump, the level gauge, the flow sensor, the temperature sensor, the pressure sensor, and the regulating valve, respectively, for controlling the parameters of the hot water pump, the cold water pump, the level gauge, the flow sensor, the temperature sensor, the pressure sensor, and the regulating valve. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the water supply and return system according to an embodiment of the present invention.

[0019] Figure label:

[0020] Kiln 100,

[0021] Cooling water jacket 1, inlet pipe assembly 11, inlet pipe 111, first inlet pipe assembly 112, second inlet pipe assembly 113, first outlet pipe 12, second outlet pipe 13, outlet pipe 14.

[0022] Water supply device 2, safety water tank 21, water distribution unit 22, first water supply device 23, second water supply device 24

[0023] Cold water pool 31, hot water pool 32,

[0024] First water return device 41, first water return pipe 411, second water return device 42, second water return pipe 421, water return collection component 43.

[0025] First cooling tower 51, second cooling tower 52

[0026] Hot water pump 6,

[0027] Cold water pump 7,

[0028] Water supply main pipe 8,

[0029] Level gauge 91, flow detection element 92, temperature detection element 93, pressure detection element 94. Detailed Implementation

[0030] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] The water supply and return system of this utility model embodiment includes a cooling water jacket 1 and multiple water supply devices 2. The cooling water jacket 1 includes multiple inlet pipes 111, which are arranged at intervals in the vertical direction and divided into multiple groups according to their required water supply pressure. Each group of inlet pipes 11 includes multiple inlet pipes 111. The multiple water supply devices 2 correspond one-to-one with the multiple groups of inlet pipes 11, and the water supply pressure of each water supply device 2 matches the required water supply pressure of the corresponding inlet pipe group 11. The water supply device 2 includes a safety water tank 21 and multiple water distribution components 22. The multiple water distribution components 22 are all connected to the safety water tank 21, and the multiple water distribution components 22 are connected one-to-one with the multiple inlet pipes 111 of the corresponding inlet pipe group 11 to supply water to the inlet pipes 111.

[0032] The water supply and return system of this utility model divides the multiple inlet pipes 111 of the cooling water jacket 1 into multiple groups of inlet pipes 11 according to the different water supply pressures required by the multiple inlet pipes 111. By setting multiple water supply devices 2 with different water supply pressures to match the multiple groups of inlet pipes 11 respectively, the water supply pressure of the water supply device 2 is matched with the water supply pressure required by the inlet pipe 111 connected to the water supply device 2. By setting multiple water distribution components 22 to connect one-to-one with the multiple inlet pipes 111 in the group of inlet pipes 11, the water supply pipes 111 are ensured to flow smoothly while avoiding overpressure, thereby preventing overpressure of the cooling water jacket 1 and improving smelting safety.

[0033] Compared to the phenomenon in related technologies where the lower part of the cooling water jacket 1 is often under overpressure, in this embodiment, multiple water supply devices 2 are set to supply water to multiple sets of water inlet pipe groups 11 respectively, so that the water supply pressure of the water supply device 2 matches the water supply pressure required by the water inlet pipe group 11, thereby achieving different pressures of water supply to different water inlet pipe groups 11 of the cooling water jacket 1.

[0034] Specifically, such as Figure 1 As shown, the cooling water jacket 1 is installed on the kiln 100, and multiple sets of water inlet pipe groups 11 are arranged at intervals in the vertical direction. Each set of water inlet pipe groups 11 includes multiple water inlet pipes 111 arranged at intervals in the vertical direction. The water supply pressure required by the upper water inlet pipe group 11 is greater than that required by the lower water inlet pipe group 11.

[0035] Optionally, there are two water inlet pipe groups 11, including a first water inlet pipe group 112 and a second water inlet pipe group 113. The first water inlet pipe group 112 is located above the second water inlet pipe group 113, and the water supply pressure required by the first water inlet pipe group 112 is greater than the water supply pressure required by the second water inlet pipe group 113. Correspondingly, there are two water supply devices 2, including a first water supply device 23 and a second water supply device 24. The first water supply device 23 is located above the second water supply device 24, and the water supply pressure of the first water supply device 23 is greater than the water supply pressure of the second water supply device 24. The water supply pressure of the first water supply device 23 is matched with the water supply pressure required by the first group of inlet pipes 112, and the water supply pressure of the second water supply device 24 is matched with the water supply pressure required by the second group of inlet pipes 113. Water is supplied to the first group of inlet pipes 112 by the first water supply device 23 and to the second group of inlet pipes 113 by the second water supply device 24, so as to realize the zoned water supply of the cooling water jacket 1 by the water supply and return system and ensure water supply safety.

[0036] Optionally, by setting up a safety water tank 21, the water supply pressure can be effectively guaranteed. It is understood that the effective volume of the safety water tank 21 needs to meet the water demand of the inlet pipe group 11 connected to the safety water tank 21 for 10-20 minutes.

[0037] For example, the first group of water inlet pipes 112 includes ten water inlet pipes 111. Correspondingly, the first water supply device 23 includes ten water distribution components 22. The inlets of the ten water distribution components 22 are connected to the safety water tank 21 of the first water supply device 23, and the outlets of the ten water distribution components 22 are connected to the ten water inlet pipes 111 one by one, so as to transport the water in the safety water tank 21 to the ten water inlet pipes 111 through the ten water distribution components 22, which helps to improve the transportation efficiency.

[0038] In some embodiments, the water supply and return system further includes a cold water tank 31 and a hot water tank 32. The cooling water jacket 1 includes a plurality of water outlet pipes 14. The plurality of water outlet pipes 14 are arranged at intervals in the vertical direction and divided into a first group of water outlet pipes 12 and a second group of water outlet pipes 13. The first group of water outlet pipes 12 is located above the second group of water outlet pipes 13. The first group of water outlet pipes 12 is connected to the cold water tank 31, and the second group of water outlet pipes 13 is connected to the hot water tank 32.

[0039] Specifically, such as Figure 1 As shown, the first group of water outlet pipes 12 includes multiple water outlet pipes 14 arranged at intervals in sequence, and the second group of water outlet pipes 13 includes multiple water outlet pipes 14 arranged at intervals in sequence. The first group of water outlet pipes 12 is located above the second group of water outlet pipes 13. This can be understood as the height of any water outlet pipe 14 in the first group of water outlet pipes 12 being higher than the height of any water outlet pipe 14 in the second group of water outlet pipes 13, and the water pressure in the first group of water outlet pipes 12 being greater than the water pressure in the second group of water outlet pipes 13.

[0040] The cold water tank 31 is used to collect and store cold water, and it supplies water to the inlet pipe 111 of the cooling water jacket 1 through the water supply device 2. The hot water tank 32 is used to store hot water and receives water flowing out of the second set of outlet pipes 13 of the cooling water jacket 1. That is, the cold water tank 31 supplies cold water to the cooling water jacket 1, and the cold water in the cooling water jacket 1 exchanges heat with the kiln 100 to become hot water, which flows out from the first set of outlet pipes 12 and the second set of outlet pipes 13. Because the water pressure in the first set of outlet pipes 12 is relatively high, the water pressure in the first set of outlet pipes 12 can meet the pressure required to transport the water to the cold water tank 31, without having to first enter the hot water tank 32 and then transport it from the hot water tank 32 to the cold water tank 31. This reduces the volume of the hot water tank 32 and saves on its floor space and construction costs.

[0041] Alternatively, the hot water tank 32 can be installed underground or above ground.

[0042] Compared to related technologies where all the return water from the cooling water jacket 1 is transported to the hot water tank 32, resulting in a large volume of the hot water tank 32, this embodiment transports the water in the first set of outlet pipes 12 to the cold water tank 31 and the water in the second set of outlet pipes 13 to the hot water tank 32. On the one hand, it utilizes the energy of the water in the first set of outlet pipes 12, reducing the transportation cost; on the other hand, it reduces the footprint of the hot water tank 32, thus reducing the cost of the hot water tank 32.

[0043] In some embodiments, the water supply and return system further includes a first return water device 41 and a second return water device 42. The first return water device 41 is connected between the first set of outlet pipes 12 and the cold water tank 31, and the second return water device 42 is connected between the second set of outlet pipes 13 and the hot water tank 32. By setting the first return water device 41, the water in the multiple outlet pipes 14 of the first set of outlet pipes 12 flows to the cold water tank 31. By setting the second return water device 42, the water in the multiple outlet pipes 14 of the second set of outlet pipes 13 flows to the hot water tank 32.

[0044] Specifically, such as Figure 1 As shown, the first return water device 41 is located above the second return water device 42. The inlet of the first return water device 41 is connected to the first set of outlet pipes 12, and the outlet of the first return water device 41 is connected to the cold water pool 31. The inlet of the second return water device 42 is connected to the second set of outlet pipes 13, and the outlet of the second return water device 42 is connected to the hot water pool 32.

[0045] In some embodiments, the first water return device 41 and the second water return device 42 each include a plurality of water return collection components 43, and the first group of water outlet pipes 12 and the second group of water outlet pipes 13 each include a plurality of water outlet pipes 14. The plurality of water return collection components 43 are connected one-to-one with the plurality of water outlet pipes 14 of the corresponding group of water outlet pipes 14 of the water return device.

[0046] Specifically, such as Figure 1 As shown, the multiple water return collection components 43 of the first water return device 41 are connected one-to-one with the multiple water outlet pipes 14 of the first group of water outlet pipes 12, and the multiple water return collection components 43 of the second water return device 42 are connected one-to-one with the multiple water outlet pipes 14 of the second group of water outlet pipes 13. The arrangement of multiple water return collection components 43 facilitates the smooth flow of water in the multiple water outlet pipes 14 to the water return device.

[0047] Optionally, the first return water device 41 further includes a first return water pipe 411, the inlet of which is connected to a plurality of return water collection components 43 of the first return water device 41, and the outlet of which is connected to the cold water pool 31; the second return water device 42 further includes a second return water pipe 421, the inlet of which is connected to a plurality of return water collection components 43 of the second return water device 42, and the outlet of which is connected to the hot water pool 32.

[0048] For example, the first set of water outlet pipes 12 has five water outlet pipes 14, and the second set of water outlet pipes 13 has eight water outlet pipes 14. Correspondingly, the first return water device 41 has five return water collection components 43, and the outlets of the five return water collection components 43 are connected to the inlet of the first return water pipe 411. The second return water device 42 has eight return water collection components 43, and the outlets of the eight return water collection components 43 are connected to the inlet of the second return water pipe 421.

[0049] In some embodiments, the water supply and return system further includes a first cooling tower 51 and a second cooling tower 52. The first cooling tower 51 is connected between the first return water device 41 and the cold water pool 31, and the second cooling tower 52 is connected between the hot water pool 32 and the cold water pool 31. The first cooling tower 51 and the second cooling tower 52 are used to cool the return water. The first cooling tower 51 cools the return water delivered by the first return water device 41, and the second cooling tower 52 cools the return water delivered by the hot water pool 32, thereby achieving cooling of the return water and ensuring the normal operation of the water supply and return system.

[0050] Specifically, such as Figure 1 As shown, the inlet of the first cooling tower 51 is connected to the outlet of the first return water pipe 411 of the first return water device 41. The first cooling tower 51 is used to cool the return water entering the first cooling tower 51 through the first return water pipe 411. The cooled water flows to the cold water pool 31.

[0051] The hot water tank 32 is connected to the outlet of the second recovery pipe of the second recovery device, and is used to receive and store the return water transported by the second recovery device. The water in the hot water tank 32 is connected to the inlet of the second cooling tower 52, so that the water in the hot water tank 32 can enter the second cooling tower 52, be cooled by the second cooling tower 52, and then flow to the cold water tank 31.

[0052] Optionally, both the first cooling tower 51 and the second cooling tower 52 are located above the cold water pool 31. The portion of water that meets the inlet pressure of the first cooling tower 51 (the first set of return water pipes connected to the first return water device 41) is directly supplied to the first cooling tower 51, cooled by the first cooling tower 51, and then flows to the cold water pool 31.

[0053] Optionally, there are two first cooling towers 51 and two second cooling towers 52. The number of cooling towers is determined based on the cooling requirements of the supply and return water system.

[0054] In some embodiments, such as Figure 1 As shown, the water supply and return system also includes a hot water pump 6. One end of the hot water pump 6 is connected to the hot water tank 32, and the other end of the hot water pump 6 is connected to the second cooling tower 52. The hot water pump 6 pressurizes the water in the hot water tank 32 and delivers it to the second cooling tower 52, where the second cooling tower 52 cools the return water, thus achieving water circulation.

[0055] In some embodiments, such as Figure 1 As shown, the water supply and return system also includes a water supply main pipe 8, one end of which is connected to the cold water tank 31, and the other end of which is connected to multiple security water tanks 21. The water supply main pipe 8 facilitates the delivery of water from the cold water tank 31 to the multiple security water tanks 21, thereby improving water flow efficiency.

[0056] In some embodiments, such as Figure 1 As shown, the water supply and return system also includes a hot water pump 6. One end of the hot water pump 6 is connected to the hot water tank 32, and the other end is connected to the cold water tank 31. The hot water pump 6 allows water in the hot water tank 32 to flow to the cold water tank 31, thus achieving water circulation.

[0057] Optionally, a cooling tower may be provided between the hot water pool 32 and the cold water pool 31.

[0058] In some embodiments, such as Figure 1 As shown, the water supply and return system also includes a cold water pump 7. One end of the cold water pump 7 is connected to the cold water tank 31, and the other end of the cold water pump 7 is connected to the main water supply pipe 8. The cold water pump 7 pressurizes the water in the cold water tank 31 and delivers it to the main water supply pipe 8, and then delivers it to the safety water tank 21 through the main water supply pipe 8, thereby improving the water flow efficiency.

[0059] Optionally, both the cold water pump 7 and the hot water pump 6 are powered by a primary load, meaning that both the cold water pump 7 and the hot water pump 6 are powered by two independent power sources to ensure uninterrupted power supply when one of their power sources fails.

[0060] In some embodiments, such as Figure 1 As shown, at least one of the cold water tank 31 and the hot water tank 32 is equipped with a level gauge 91.

[0061] Specifically, such as Figure 1 As shown, at least one of the cold water tank 31 and the hot water tank 32 is equipped with a level gauge 91. This can be understood as: a level gauge 91 is installed in the cold water tank 31; or a level gauge 91 is installed in the hot water tank 32; or, there are two level gauges 91, one in the cold water tank 31 and one in the hot water tank 32. In this embodiment, level gauges 91 are installed in both the cold water tank 31 and the hot water tank 32 to facilitate real-time monitoring of the water levels in both tanks.

[0062] In some embodiments, such as Figure 1 As shown, the water supply and return system also includes a flow detection element 92, a temperature detection element 93, a pressure detection element 94, and a regulating valve, all of which are located on the main water supply pipe 8. By installing the flow detection element 92, temperature detection element 93, and pressure detection element 94 on the main water supply pipe 8, it is convenient to monitor the flow rate, temperature, and pressure within the main water supply pipe 8 in real time. The water flow rate within the main water supply pipe 8 can be adjusted using the regulating valve.

[0063] In some embodiments, the water supply and return system further includes a controller, which is connected to the hot water pump 6, the cold water pump 7, the level gauge 91, the flow sensor 92, the temperature sensor 93, the pressure sensor 94, and the regulating valve, respectively, for controlling the parameters of the hot water pump 6, the cold water pump 7, the level gauge 91, the flow sensor 92, the temperature sensor 93, the pressure sensor 94, and the regulating valve. By setting up the controller, remote real-time monitoring and control of the water supply and return system is facilitated.

[0064] The controller is equipped with a display screen to intuitively show the operating parameters of the hot water pump 6, cold water pump 7, level gauge 91, flow sensor 92, temperature sensor 93, pressure sensor 94, and regulating valve, so as to adjust the operating parameters of the hot water pump 6, cold water pump 7, and regulating valve.

[0065] The water supply and return method of this embodiment includes: dividing the multiple water inlet pipes into multiple groups of water inlet pipes according to the different water supply pressures required by the multiple water inlet pipes of the cooling water jacket; corresponding multiple water supply devices to the multiple groups of water inlet pipes one by one, and matching the water supply pressure of the water supply device with the water supply pressure required by the water inlet pipe group corresponding to the water supply device; and supplying water to the multiple groups of water inlet pipes through the multiple water supply devices respectively.

[0066] The water supply and return method of this embodiment divides the multiple water inlet pipes into multiple groups of water inlet pipes according to the different water supply pressures required by the multiple water inlet pipes of the cooling water jacket. By setting multiple water supply devices with different water supply pressures to match the multiple groups of water inlet pipes respectively, the water supply pressure of the water supply device is matched with the water supply pressure required by the water inlet pipe connected to the water supply device. By setting multiple water supply devices to supply water to multiple groups of water inlet pipes respectively, it is ensured that the water inlet pipes can enter smoothly while avoiding overpressure, thereby avoiding overpressure of the cooling water jacket and improving smelting safety.

[0067] Optionally, the required water supply pressures of the multiple inlet pipe groups are P1, P2, ..., Pn, the elevations of the highest inlet pipes in the multiple inlet pipe groups are Z1, Z2, ..., Zn, the water supply volumes of the multiple water supply devices are Q1, Q2, ..., Qn, and the flow rate of the cold water pump is Q = Q1 + Q2 + ..., Qn.

[0068] The water supply and return method of this embodiment further includes: calculating the effective volume and minimum liquid level elevation of the safety water tank of the water supply device; determining the relative elevation of the dividing boundary of multiple water outlet pipes of the cooling water jacket according to the required pressure and relative elevation of the inlet of the first cooling tower, wherein the water outlet pipe located above the relative elevation of the dividing boundary is connected to the first cooling tower, and the water outlet pipe located below the relative elevation of the dividing boundary is connected to the hot water tank, wherein the relative elevation of the dividing boundary is b1, the required pressure of the inlet of the first cooling tower is p, the relative elevation of the first cooling tower is b2, and b1≥p×100+b2.

[0069] The water supply and return method of this embodiment determines the relative elevation of the dividing boundary of multiple water outlet pipes of the cooling water jacket according to the required inlet pressure and relative elevation of the first cooling tower. This allows water in the water outlet pipes above the dividing boundary relative elevation to flow directly to the first cooling tower, and water in the water outlet pipes below the dividing boundary relative elevation to flow directly to the hot water tank. On the one hand, this utilizes the energy of the water in the first set of water outlet pipes, reducing transportation costs; on the other hand, it reduces the footprint of the hot water tank, thus reducing the cost of the hot water tank.

[0070] Optionally, the effective volume of the i-th safety tank is Vi = [(10~20)×Qi] / 60, and the minimum liquid level of the i-th safety tank is Hi = Pi×100+Zi, where i takes the values ​​1, 2, 3...n.

[0071] The following is a detailed explanation of the water supply and return system in the smelting plant of a certain smelting enterprise:

[0072] A copper smelting plant has one side-blown furnace and one lean-burn electric arc furnace. The design inlet pressure of the cooling water jacket for the side-blown furnace is 0.30 MPa. The design inlet pressure of the lance water jacket and furnace body water jacket for the lean-burn electric arc furnace is 0.30-0.40 MPa, and the design inlet pressure of the other cooling water jackets is 0.20-0.30 MPa. Based on this, the design steps and parameters for the water supply and return system of the smelting furnaces in this plant are as follows:

[0073] Based on the inlet water pressure of the kiln cooling water jacket, the smelting kiln cooling water jacket is divided into two inlet pipe groups: a high-pressure group and a low-pressure group. The water supply of the high-pressure inlet pipe group is 2400 m³ / s. 3 The elevation of the highest inlet pipe of the high-pressure water inlet group is 19.35m; the water supply capacity of the low-pressure water inlet group is 1700m³ / h. 3 / h, the elevation of the highest inlet pipe of the low-pressure inlet pipe group is 7.67m. The design flow rate of the cold water pump is 4100m³ / h. 3 / h.

[0074] Based on the water consumption required for 10 minutes by the safety water tank of the water supply system to store the cooling water jacket, the effective volumes of the safety water tanks of the water supply systems corresponding to the high-pressure zone inlet pipe group and the low-pressure zone inlet pipe group are 400 m³ and 400 m³, respectively. 3 / h and 284m 3 The minimum liquid level elevations are 39.35m and 9.7m respectively. The design head of the cold water pump is 45m.

[0075] The minimum inlet pressure required for the first cooling tower is 0.10 MPa, and the relative elevation of the inlet is 0.12 m. Calculations show the boundary relative elevation to be 10.12 m. The smelting kiln cooling water jacket is divided into upper and lower return water systems. Considering pipeline water loss, the flow rate of the outlet pipe (upper return water zone) of the cooling water jacket above elevation 15.00 m is 1588 m³ / h. 3 / h, after being collected by the first return water device, the water flows directly to the first cooling tower through the first return water pipe. The flow rate of the remaining cooling water jackets' outlet pipes (lower return water zone) is 2512m³ / h. 3 / h, after being collected by the second return water device, it returns to the hot water tank through the second return water pipe.

[0076] Compared to the centralized water supply and return system with only one water supply device in related technologies and the zoned water supply and return system with multiple water supply devices and multiple return devices in this embodiment, the configuration of the hot water tank and cooling tower is as follows:

[0077] <![CDATA[Effective volume of hot water tank (m 3 )]]> 628 1025 <![CDATA[Hot water pump flow rate (m 3 / h)]]> 2520 4100 Hot water pump power (kW) 185 315 <![CDATA[Cooling tower configuration (m 3 / h × number of units)]]> 2500×1+1600×1 2100×2

[0078] Compared to traditional centralized systems, the use of zoned water supply and return systems can fully guarantee the water safety of the kiln cooling water jacket and effectively reduce the volume of the hot water tank and the flow rate of the hot water pump.

[0079] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0080] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0081] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0082] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0083] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0084] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A water supply and return system, characterized in that, include: A cooling water jacket, the cooling water jacket including multiple water inlet pipes, the multiple water inlet pipes being arranged at intervals in the vertical direction and divided into multiple groups according to their required water supply pressure, each group of water inlet pipes including multiple water inlet pipes. Multiple water supply devices are provided, each corresponding to one of the multiple sets of water inlet pipe groups. The water supply pressure of each water supply device is matched with the required water supply pressure of the corresponding water inlet pipe group. Each water supply device includes a safety water tank and multiple water distribution components. Each water distribution component is connected to the safety water tank and is connected to multiple water inlet pipes of the corresponding water inlet pipe group to supply water to the water inlet pipes.

2. The water supply and return system according to claim 1, characterized in that, It also includes a cold water tank and a hot water tank. The cooling water jacket includes multiple water outlet pipes, which are arranged at intervals in the vertical direction and divided into a first group of water outlet pipes and a second group of water outlet pipes. The first group of water outlet pipes is located above the second group of water outlet pipes. The first group of water outlet pipes is connected to the cold water tank, and the second group of water outlet pipes is connected to the hot water tank.

3. The water supply and return system according to claim 2, characterized in that, It also includes a first water return device and a second water return device. The first water return device is connected between the first set of water outlet pipes and the cold water pool, and the second water return device is connected between the second set of water outlet pipes and the hot water pool.

4. The water supply and return system according to claim 3, characterized in that, Both the first and second water return devices include multiple water return collection components, and both the first and second sets of water outlet pipes include multiple water outlet pipes. The multiple water return collection components are connected one-to-one with the multiple water outlet pipes of the corresponding water outlet pipe group of the water return device.

5. The water supply and return system according to claim 3, characterized in that, It also includes a first cooling tower and a second cooling tower. The first cooling tower is connected between the first return water device and the cold water pool, and the second cooling tower is connected between the hot water pool and the cold water pool. The first cooling tower and the second cooling tower are used to cool the return water.

6. The water supply and return system according to claim 5, characterized in that, It also includes a hot water pump, one end of which is connected to the hot water tank and the other end of which is connected to the second cooling tower.

7. The water supply and return system according to any one of claims 2-6, characterized in that, It also includes a water supply main pipe, one end of which is connected to the cold water tank, and the other end of which is connected to one of the security water tanks; and / or, The water supply and return system also includes a hot water pump, one end of which is connected to the hot water tank and the other end of which is connected to the cold water tank.

8. The water supply and return system according to claim 7, characterized in that, It also includes a cold water pump, one end of which is connected to the cold water tank, and the other end of which is connected to the main water supply pipe; and / or, At least one of the cold water tank and the hot water tank is equipped with a level gauge.

9. The water supply and return system according to claim 8, characterized in that, It also includes a flow sensor, a temperature sensor, a pressure sensor, and a regulating valve, all of which are located on the main water supply pipe.

10. The water supply and return system according to claim 9, characterized in that, It also includes a controller, which is connected to the hot water pump, the cold water pump, the level gauge, the flow sensor, the temperature sensor, the pressure sensor, and the regulating valve, respectively, and is used to control the parameters of the hot water pump, the cold water pump, the level gauge, the flow sensor, the temperature sensor, the pressure sensor, and the regulating valve.

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