Secondary water supply system

Abstract

The utility model relates to the technical field of secondary water supply, and discloses a secondary water supply system which comprises a water supply tank, a steady flow tank, a water treatment device, a circulating water purification pipe and a circulating pressure pump set. One end of the circulating water purification pipe is connected with a water outlet of the water treatment device, the other end of the circulating water purification pipe is connected between a water inlet of the water treatment device and a water outlet of the flow stabilization tank, and the circulating pressure pump set is arranged on the circulating water purification pipe and is close to the water treatment device and comprises a first pressure pump and a second pressure pump; and the circulating pressure pump set has a first working state in which the first pressure pump works and the second pressure pump does not work and a second working state in which the second pressure pump works. Water is supplied to users through the two pressure pumps, the water pressure of water used by the high-rise users is guaranteed, the circulating pressure pump set is adopted to play a role of the circulating pump set, water supply circulation of a pipe network in a community is achieved, and the retention time of water in the pipe network is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of secondary water supply, in particular to a secondary water supply system. Background Art

[0002] The urban water supply system is one of the indispensable infrastructures of modern cities. It is responsible for providing clean and safe drinking water to residents, ensuring the basic living needs of urban residents and maintaining public health. The urban water supply system must fully guarantee the users' needs for water pressure, water quality and water quantity.

[0003] In recent years, with the large-scale development and construction of cities and the continuous improvement of residents' requirements for water quality and water pressure, urban water supply systems are facing a series of problems and challenges. Water storage tanks are installed on the top of high-rise buildings to supply water to high-rise users. However, there is a phenomenon of insufficient water pressure when high-rise users use water. Utility Model Content

[0004] In view of this, the utility model provides a secondary water supply system to solve the problem of insufficient water pressure when supplying water to high-rise users through a water tank on the top of a building.

[0005] The utility model provides a secondary water supply system, comprising: a water supply tank, a flow stabilizing tank, a water treatment device, a circulating water purification pipe and a circulating pressure pump group. The water supply tank, the flow stabilizing tank and the water treatment device are connected in sequence. One end of the circulating water purification pipe is connected to the water outlet of the water treatment device, and the other end of the circulating water purification pipe is connected between the water inlet of the water treatment device and the water outlet of the flow stabilizing tank. The circulating pressure pump group is arranged on the circulating water purification pipe and is arranged close to the water treatment device. The circulating water purification pipe is provided with a user connection port located downstream of the circulating pressure pump group. The circulating pressure pump group comprises a first pressure pump and a second pressure pump. The circulating pressure pump group has a first working state in which the first pressure pump is working and the second pressure pump is not working, and a second working state in which the second pressure pump is working.

[0006] Beneficial effect: when the water demand is low, the first booster pump is turned on to supply water to each user in the community directly through the first booster pump; when the first booster pump cannot meet the water demand, the second booster pump is turned on or the second booster pump and the first booster pump are turned on at the same time, and water is supplied to each user in the community directly through the second booster pump or the second booster pump and the first booster pump. When the above-mentioned secondary water supply system is adopted, water is directly supplied to users through two booster pumps, and there is no need to supply water to high-rise users through the water storage tank on the top of the building, which effectively guarantees the water pressure of high-rise users, and effectively solves the problem of insufficient water pressure when supplying water to high-rise users through the water storage tank on the top of the building. In addition, under the action of the circulating booster pump group, water can circulate in the circulating loop formed by the water treatment device, the circulating booster pump group, and the circulating water purification pipe. The circulating booster pump group is used to play the role of the circulating pump group, realize the water supply cycle of the internal pipe network of the community, reduce the retention time of water in the pipe network, reduce the water age of the internal pipe network of the community, and ensure the circulation supply of clean water.

[0007] In an optional embodiment, the secondary water supply system also includes a flow detection component, a flow control valve and a controller. The flow detection component is arranged on the circulating clean water pipe and is located downstream of the most downstream user connection port. The flow control valve is arranged on the circulating clean water pipe and is located upstream of the circulating booster pump group. The controller is electrically connected to the first booster pump, the second booster pump, the flow detection component, and the flow control valve. The controller is used to control the opening and closing and the opening degree of the flow control valve according to the flow detected by the flow detection component, and to control whether the first booster pump and the second booster pump are working according to the opening and closing and the opening degree of the flow control valve.

[0008] Beneficial effect: The flow rate detected by the flow detection device is the return water volume. The controller automatically controls the opening of the flow control valve and the two booster pumps according to the return water volume. No manual operation is required, and automatic adjustment is achieved. While ensuring the user's water pressure demand, it saves energy consumption of the water pump unit and solves the problem of insufficient water pressure in high-rise water supply.

[0009] In an optional embodiment, the water treatment device includes an activated carbon adsorption device and a membrane treatment device, and the circulating water purification pipe is an antibacterial stainless steel pipe.

[0010] Beneficial effects: The activated carbon adsorption device can absorb impurities in the water, reduce the residual chlorine concentration in the water, and reduce the corrosion loss of the ultrafiltration membrane components. The membrane treatment device can remove heavy metals, bacteria, organic matter, etc. in the water, thereby obtaining high-quality purified water. The antibacterial stainless steel pipe used has a killing rate of more than 99% for Escherichia coli and Staphylococcus aureus, and also has a significant killing effect on other bacteria such as Candida albicans.

[0011] In an optional embodiment, the secondary water supply system also includes a first pressure detecting component and a second pressure detecting component. The first pressure detecting component is arranged at the water inlet front end of the activated carbon adsorption device, and the second pressure detecting component is arranged at the water outlet rear end of the activated carbon adsorption device. The controller is used to determine whether the activated carbon adsorption device needs to be replaced based on the difference between the pressure detected by the first pressure detecting component and the pressure detected by the second pressure detecting component.

[0012] Beneficial effect: The difference between the pressure detected by the first pressure detection component and the pressure detected by the second pressure detection component is used to guide the replacement of the activated carbon adsorption device, thereby optimizing the module update and maintenance of the water purification process.

[0013] In an optional embodiment, the secondary water supply system also includes a third pressure detection component and a backwash pipe, the third pressure detection component is arranged at the rear end of the water outlet of the membrane treatment device, one end of the backwash pipe is connected to the backwash port of the membrane treatment device and the other end is connected to the front end of the water inlet of the activated carbon adsorption device, and the controller is used to control whether the membrane treatment device is backwashed according to the difference between the pressure detected by the second pressure detection component and the pressure detected by the third pressure detection component.

[0014] Beneficial effect: The difference between the pressure detected by the second pressure detection component and the pressure detected by the third pressure detection component is used to guide the backwashing of the filter membrane, thereby optimizing the module update and maintenance of the water purification process.

[0015] In an optional embodiment, the secondary water supply system also includes a water supply pipe and a liquid level valve. The water inlet of the water supply tank is connected to the water supply pipe. The liquid level valve includes a main valve and a pilot valve. The main valve is arranged on the water supply pipe, and the pilot valve is arranged in the water supply tank.

[0016] Beneficial effect: The liquid level valve is used for water replenishment, which fully combines the actual water demand and water use rules of users, realizes intelligent control of the water storage and replenishment volume of the water supply tank, and optimizes the traditional water replenishment control measures.

[0017] In an optional implementation, the flow rate of the first boosting pump is smaller than the flow rate of the second boosting pump.

[0018] Beneficial effect: The first booster pump can be called a small pump, and the second booster pump can be called a large pump. The circulating booster pump group is selected according to the actual water consumption and water pressure of the community, and a combination of large and small pumps is designed. When the water consumption is low, the small pump is turned on first for water supply; when the small pump cannot meet the water demand, the large pump is turned on or the large and small pumps are turned on at the same time, which saves the energy consumption of the water pump unit while ensuring the water pressure demand of users.

[0019] In an optional embodiment, a one-way valve is provided on the circulating clean water pipe, which is located downstream of the flow detection element. The one-way valve is suitable for allowing clean water to flow from the flow detection element to the water treatment device and preventing clean water in the water treatment device from flowing to the flow detection element.

[0020] Beneficial effect: The setting of the one-way valve can prevent the clean water from flowing back.

[0021] In an optional embodiment, a vacuum suppressor is provided on the swirl pot.

[0022] Beneficial effect: The vacuum suppressor controls the generation of no negative pressure and maintains the pressure balance of the tap water network.

[0023] In an optional embodiment, the volume of the water supply tank is twice the preset water volume.

[0024] Beneficial effect: The preset water consumption is the peak daily water consumption of the community, and the volume of the water supply tank is designed to be twice the peak daily water consumption of the community to meet the short-term water demand during peak water consumption or water outage. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of a secondary water supply system according to an embodiment of the utility model.

[0027] Description of reference numerals:

[0028] 1. Water supply tank; 2. Flow stabilizer; 4. Antibacterial stainless steel pipe; 5. Circulation and pressure pump group; 6. Flow detection part; 7. Water supply pipe; 8. Flow control valve; 901. Main valve; 902. Pilot valve; 10. Check valve; 11. Activated carbon adsorption device; 12. Membrane treatment device; 13. Vacuum suppressor; 14. User faucet; 15. First pressure detection part; 16. Second pressure detection part; 17. Third pressure detection part; 18. Backwash pipe. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0030] In the related technologies, for some areas, due to the influence of terrain or building height, there is a phenomenon of insufficient water pressure when water is directly supplied by the municipal water supply network, especially during peak water use periods, and the water pressure of high-rise users is often unable to be guaranteed. After the residential buildings are connected to the municipal water supply network, if the users do not use it for a long time, it will lead to problems such as the long water age of the pipe network, and the subsequent direct loss of the water supply with a long water age will also cause a waste of water resources.

[0031] In order to solve the problem of insufficient water pressure in high-rise buildings and long water age of pipe networks in residential areas, the following Figure 1 , describing an embodiment of the utility model.

[0032] According to an embodiment of the utility model, a secondary water supply system is provided, comprising: a water supply tank 1, a simmering tank 2, a water treatment device, a circulating water purification pipe and a circulating pressure pump group 5, the water supply tank 1, the simmering tank 2 and the water treatment device are connected in sequence, one end of the circulating water purification pipe is connected to the water outlet of the water treatment device, the other end of the circulating water purification pipe is connected between the water inlet of the water treatment device and the water outlet of the simmering tank 2, the circulating pressure pump group 5 is arranged on the circulating water purification pipe and is arranged close to the water treatment device, the circulating water purification pipe is provided with a user connection port located downstream of the circulating pressure pump group 5, the circulating pressure pump group 5 comprises a first pressure pump and a second pressure pump, the circulating pressure pump group 5 has a first working state in which the first pressure pump is working and the second pressure pump is not working, and a second working state in which the second pressure pump is working.

[0033] When the secondary water supply system of this embodiment is used, when the water demand is low, the first booster pump is turned on to supply water to each user in the community directly through the first booster pump; when the first booster pump cannot meet the water demand, the second booster pump is turned on or the second booster pump and the first booster pump are turned on at the same time, and water is supplied to each user in the community directly through the second booster pump or the second booster pump and the first booster pump. When the above-mentioned secondary water supply system is used, water is directly supplied to users through two booster pumps, and there is no need to supply water to high-rise users through the water storage tank on the top of the building, which effectively guarantees the water pressure of high-rise users, effectively solves the problem of insufficient water pressure when supplying water to high-rise users through the water storage tank on the top of the building, and under the action of the circulating booster pump group 5, water can circulate in the circulating loop formed by the water treatment device, the circulating booster pump group 5, and the circulating water purification pipe, and the circulating booster pump group 5 is used to play the role of the circulating pump group, so as to realize the water supply cycle of the internal pipe network of the community, reduce the retention time of water in the pipe network, reduce the water age of the internal pipe network of the community, and ensure the circulation supply of clean water.

[0034] In one embodiment, the secondary water supply system further includes a flow detection component 6, a flow control valve 8 and a controller. The flow detection component 6 is arranged on the circulating water purification pipe and is located downstream of the most downstream user connection port. The flow control valve 8 is arranged on the circulating water purification pipe and is located upstream of the circulating booster pump group 5. The controller is electrically connected to the first booster pump, the second booster pump, the flow detection component 6 and the flow control valve 8. The controller is used to control the opening and closing and the opening degree of the flow control valve 8 according to the flow detected by the flow detection component 6, and to control the opening and closing and the opening degree of the flow control valve 8 according to the flow detected by the flow detection component 6. The flow detected by the flow detection component 6 is the return water volume. The controller automatically controls the opening degree of the flow control valve 8 and the two booster pumps according to the return water volume, without manual operation, to achieve automatic regulation, to save energy consumption of the water pump unit while ensuring the water pressure demand of the user, and to solve the problem of insufficient water pressure in high-rise water supply.

[0035] Furthermore, the flow detection component 6 is a flow meter or a flow sensor, etc., and the flow meter is specifically an electromagnetic flow meter, etc.

[0036] Specifically, the return water volume is monitored by an electromagnetic flowmeter, and this is used as a control signal for the opening and closing and opening degree of the flow control valve 8, and the opening and closing and opening degree of the flow control valve 8 are used as the start and stop signals of the circulation pump group. When the monitored return water volume is large, it means that the actual water consumption in the current period is small, and the opening degree of the flow control valve 8 is reduced, and the operating frequency of the water pump is adjusted to achieve water pump energy saving, thereby ensuring the balance between water supply pressure and water pump energy saving.

[0037] In the relevant technology, raw water is treated by the water plant and connected to the municipal water distribution network after the water quality meets the standards. The water quality deteriorates during transportation due to pipe corrosion, microbial contamination, etc., resulting in the residual chlorine, turbidity and microbial indicators of the water at the end of the water supply not meeting the standards.

[0038] In order to solve the problem of substandard water quality, in one embodiment, the water treatment device includes an activated carbon adsorption device 11 and a membrane treatment device 12, and the circulating water purification pipe is an antibacterial stainless steel pipe 4. The activated carbon adsorption device 11 can adsorb impurities in the water, reduce the residual chlorine concentration in the water, and reduce the corrosion loss of the ultrafiltration membrane assembly. The membrane treatment device 12 can remove heavy metals, bacteria, organic matter, etc. in the water, thereby obtaining high-quality purified water. The antibacterial stainless steel pipe 4 used has a killing rate of more than 99% for Escherichia coli and Staphylococcus aureus, and also has a significant killing effect on other bacteria such as Candida albicans. The sterilization principle of antibacterial stainless steel materials involves the following two aspects:

[0039] On the one hand, the characteristics of stainless steel: stainless steel is a material with excellent corrosion resistance. A dense oxide film is formed on its surface, which can prevent further erosion by substances such as oxygen and moisture in media such as air and water. This oxide film makes stainless steel corrosion-resistant, high-temperature-resistant, and wear-resistant. During the sterilization process, the smoothness and stability of the stainless steel surface help to evenly distribute the sterilizer and completely kill bacteria.

[0040] On the other hand, the role of antimicrobial agents: antimicrobial stainless steel materials usually coat or incorporate antimicrobial agents on the surface of stainless steel, such as silver ions, copper ions, etc. These antimicrobial agents can interact with the cell walls or cell membranes of microorganisms, destroy the growth environment of microorganisms, thereby killing bacteria, fungi and other microorganisms, and achieving the effect of sterilization.

[0041] The water provided by the municipal pipe network is processed in sequence by the activated carbon adsorption device 11 and the membrane treatment device 12, and is supplied to the community through a circulating water purification pipe made of antibacterial stainless steel, thereby improving the overall water quality of the community.

[0042] Furthermore, the membrane treatment device 12 is specifically an ultrafiltration membrane treatment device or the like.

[0043] In one embodiment, the secondary water supply system further includes a first pressure detection member 15 and a second pressure detection member 16. The first pressure detection member 15 is disposed at the water inlet front end of the activated carbon adsorption device 11, and the second pressure detection member 16 is disposed at the water outlet rear end of the activated carbon adsorption device 11. The controller is used to determine whether the activated carbon adsorption device 11 needs to be replaced based on the difference between the pressure detected by the first pressure detection member 15 and the pressure detected by the second pressure detection member 16. The difference between the pressure detected by the first pressure detection member 15 and the pressure detected by the second pressure detection member 16 is used to guide the replacement of the activated carbon adsorption device 11, and optimize the module update and maintenance of the water purification process.

[0044] Furthermore, the pressure detected by the first pressure detection component 15 is P1, and the pressure detected by the second pressure detection component 16 is P2. When P1-P2 reaches 0.1-0.15 MPa, the activated carbon is replaced.

[0045] In one embodiment, the secondary water supply system further includes a third pressure detection member 17 and a backwash pipe 18. The third pressure detection member 17 is disposed at the water outlet rear end of the membrane treatment device 12. One end of the backwash pipe 18 is connected to the backwash port of the membrane treatment device 12 and the other end is connected to the water inlet front end of the activated carbon adsorption device 11. The controller is used to control whether the membrane treatment device 12 is backwashed according to the difference between the pressure detected by the second pressure detection member 16 and the pressure detected by the third pressure detection member 17. The difference between the pressure detected by the second pressure detection member 16 and the pressure detected by the third pressure detection member 17 is used to guide the backwashing of the filter membrane and optimize the module update and maintenance of the water purification process.

[0046] Furthermore, the pressure detected by the third pressure detection component 17 is P3. When P2-P3 reaches 0.06-0.08MPa, the filter membrane is backwashed. At this time, the flow control valve is closed, and a backwash control valve is provided on the backwash pipe 18, and the backwash control valve is opened.

[0047] Specifically, the first pressure detection component 15, the second pressure detection component 16 and the third pressure detection component 17 are pressure gauges or water pressure sensors, etc. The first pressure detection component 15, the second pressure detection component 16 and the third pressure detection component 17 use pressure gauges, and the three pressure gauges are pressure gauge No. 1, pressure gauge No. 2 and pressure gauge No. 3 respectively.

[0048] In one embodiment, the secondary water supply system further includes a water supply pipe 7 and a liquid level valve. The water inlet of the water supply tank 1 is connected to the water supply pipe 7. The liquid level valve includes a main valve 901 and a pilot valve 902. The main valve 901 is arranged on the water supply pipe 7, and the pilot valve 902 is arranged in the water supply tank 1. The liquid level valve is used for water replenishment, which fully combines the actual water demand and water use rules of the user, realizes intelligent control of the water storage and replenishment amount of the water supply tank 1, and optimizes the traditional water replenishment control measures.

[0049] Furthermore, the liquid level valve is a remote-controlled float valve or the like.

[0050] In one embodiment, the flow rate of the first booster pump is less than the flow rate of the second booster pump. In this case, the first booster pump can be called a small pump, and the second booster pump can be called a large pump. The circulating booster pump group 5 is selected according to the actual water consumption and water pressure of the community, and a combination of large and small pumps is designed. When the water consumption is low, the small pump is turned on first to supply water; when the small pump cannot meet the water demand, the large pump is turned on or the large and small pumps are turned on at the same time, which saves the energy consumption of the water pump unit while ensuring the user's water pressure demand.

[0051] In one embodiment, a one-way valve 10 is provided on the circulating clean water pipe, and the one-way valve 10 is located downstream of the flow detection element 6. The one-way valve 10 is suitable for allowing the clean water to flow from the flow detection element 6 to the water treatment device and preventing the clean water in the water treatment device from flowing to the flow detection element 6. The setting of the one-way valve 10 can prevent the clean water from flowing back.

[0052] In one embodiment, a vacuum suppressor 13 is provided on the swirl pot 2. The vacuum suppressor 13 controls the generation of no negative pressure and maintains the pressure balance of the tap water network.

[0053] In the related art, for some areas, during the peak water usage period, the water demand may not be met, or when an emergency water outage occurs, community users lack backup water supply, affecting water use.

[0054] In order to solve the problem of insufficient water supply during peak water consumption, in one embodiment, the volume of the water supply tank 1 is twice the preset water consumption. The preset water consumption is the peak value of the daily water consumption of the community. The volume of the water supply tank 1 is designed to be twice the peak value of the daily water consumption of the community to meet the short-term water demand during peak water consumption or water outage. The liquid level of the water supply tank 1 is controlled by a remote-controlled float valve.

[0055] The water supply process of the secondary water supply system is described below:

[0056] After the community is connected to the municipal water supply pipe 7 network, the water first enters the water supply tank 1 through the remote control float valve, and the remote control float valve controls the liquid level of the water supply tank 1;

[0057] Municipal water flows from the outlet of the water supply tank 1 into the simmering tank 2, and is controlled by the vacuum suppressor 13 to prevent negative pressure from being generated;

[0058] After the community is connected to the municipal pipe network, the water first enters the water tank through the remote control float valve, and the remote control float valve controls the water tank liquid level; thereafter, the municipal water flows into the flow stabilization tank 2 from the outlet of the water supply tank 1, and is controlled by the vacuum suppressor 13 to prevent negative pressure from being generated;

[0059] The water from the stabilizing tank 2 passes through the No. 1 pressure gauge and then enters the activated carbon adsorption device 11, and then enters the ultrafiltration membrane treatment device 12 through the No. 2 pressure gauge. The treated clean water passes through the No. 3 pressure gauge and the flow control valve 8, and the booster pump group with both lifting and circulation functions supplies the treated clean water to the user's faucet 14 through the antibacterial stainless steel clean water pipe; at the same time, the clean water temporarily stored in the clean water pipe is returned to the rear end of the stabilizing tank 2 after passing through the electromagnetic flow meter under the action of the circulation pump group. The opening and closing or opening degree of the flow control valve 8 is controlled according to the metered return water volume of the electromagnetic flowmeter, and the flow control valve 8 further controls the start and stop scheduling of the circulation pump group. The system sets a one-way valve 10 at the rear end of the electromagnetic flowmeter to prevent backflow.

[0060] When P1-P2 reaches 0.1-0.15MPa, replace the activated carbon; when P2-P3 reaches 0.06-0.08MPa, backwash the filter membrane, at this time control the flow valve to close and the backwash valve to open.

[0061] In the relevant technologies, the water pressure of high-rise buildings in the community cannot be met during peak periods, and the residual chlorine, turbidity and microbial indicators of the water quality at the end of the water supply are not up to standard. The secondary water supply system uses a fixed liquid level float mechanical control water replenishment, which has the problem of too little fresh water replenishment, too much tap water retention, too long water age, and "dead water" in the water tank. The replacement of activated carbon and filter membrane backwashing in the water purification process rely more on manual experience or fixed time periods, and lack the support of intelligent means; the start and stop scheduling of the secondary water supply pump is mainly guided by the daily water use time, and it is difficult to maintain a balance between water pressure guarantee and water pump energy saving.

[0062] The secondary water supply system for the building of this embodiment adopts water supply water quality purification technology, water purification circulation system and intelligent monitoring and control technologies to provide high-quality drinking water for building users on the basis of ensuring water saving and energy saving. A combination of large and small booster pumps is adopted to meet the water pressure of high-rise users in the community and save the energy consumption of the water pump unit. At the same time, in order to reasonably and effectively utilize water resources, ensure the water supply pressure, and reduce the deterioration of water quality caused by the long water age, a circulating booster pump group 5 is set to play the role of pressurization and circulation, and a return water network formed by a circulating water purification pipe is built to realize the circulation supply of treated water. An electromagnetic flowmeter is installed at the end of the return water network to monitor the return water volume, and the flow will be used as a receiving signal of the automatic control device to control the opening and closing or opening of the flow control valve 8, and further control the start and stop of the circulating water pump through the opening of the valve, so as to realize intelligent energy-saving water replenishment, which is more efficient and intelligent. The activated carbon adsorption device 11 and the ultrafiltration membrane treatment device 12 are used to further treat the water supply from the municipal pipe network, and antibacterial stainless steel pipes containing copper and silver are used as water supply pipes in the community to improve the water quality. At the same time, pressure gauges are installed at the inlet and outlet of the activated carbon adsorption device 11 and the ultrafiltration membrane treatment device 12, and the pressure difference between the inlet and outlet of the device is used to control the replacement of activated carbon and the backwashing time of the ultrafiltration membrane. The above system integrates multiple technologies to achieve water purification and circulation, solves the existing problems of water supply pressure, water quality, replacement of activated carbon and backwashing of ultrafiltration membrane, and start and stop of the second water supply pump, improves intelligent water replenishment means, optimizes the module update and maintenance of the water purification process, ensures energy saving and reduction while ensuring water supply pressure, and provides scientific and reliable technical support for the quality and pressure-maintaining circulation supply of purified water in urban buildings, and has broad application prospects.

[0063] It should be noted that the activated carbon adsorption device 11, the membrane treatment device 12 and the vacuum suppressor 13 can all adopt the structures in the prior art, and will not be described in detail here.

[0064] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0065] 1. Use a combination of large and small pumps to optimize water supply scheduling and save water supply energy consumption.

[0066] 2. Use a booster pump group to play the role of a circulating pump group, realize the circulating supply of clean water, reduce the water age of the internal pipe network in the community, and ensure the circulating supply of clean water.

[0067] 3. Use water supply tank 1 to store water to meet the short-term backup water supply during peak water usage or water outage periods.

[0068] 4. The opening and closing and opening degree of the flow control valve 8 are controlled by the return water volume of the community's purified water. The opening and closing and opening degree of the flow control valve 8 are used to control the start and stop of the circulation pump group, thereby achieving energy saving of the pump group while ensuring the water supply pressure.

[0069] 5. A series of water purification processes such as activated carbon adsorption and ultrafiltration membrane treatment are used to further treat the municipal water supply. Antibacterial stainless steel pipes are used in the community water purification network, which can effectively kill Escherichia coli, Staphylococcus aureus, Candida albicans, etc., and improve the water supply quality.

[0070] 6. A pressure gauge is installed in the system, and the inlet and outlet pressure difference of the activated carbon adsorption device 11 and the ultrafiltration membrane treatment device is used to control the replacement of activated carbon and the backwashing of the filter membrane, so as to optimize the module update and maintenance of the water purification process.

[0071] 7. Apply water purification devices, circulating water supply devices and intelligent control devices to the traditional secondary water supply system to meet the requirements of building users for water quality, water quantity and water pressure, and realize an intelligent and economical water supply mode.

[0072] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A secondary water supply system, characterized in that: include: A water supply tank (1), a simmering tank (2), a water treatment device, a circulating water purification pipe and a circulating booster pump group (5), wherein the water supply tank (1), the simmering tank (2) and the water treatment device are connected in sequence, one end of the circulating water purification pipe is connected to the water outlet of the water treatment device, and the other end of the circulating water purification pipe is connected between the water inlet of the water treatment device and the water outlet of the simmering tank (2), the circulating booster pump group (5) is arranged on the circulating water purification pipe and is arranged close to the water treatment device, the circulating water purification pipe is provided with a user connection port located downstream of the circulating booster pump group (5), the circulating booster pump group (5) comprises a first booster pump and a second booster pump, and the circulating booster pump group (5) has a first working state in which the first booster pump is working and the second booster pump is not working, and a second working state in which the second booster pump is working.

2. The secondary water supply system according to claim 1, characterized in that: The secondary water supply system also includes a flow detection element (6), a flow control valve (8) and a controller. The flow detection element (6) is arranged on the circulating water purification pipe and is located downstream of the most downstream user connection port. The flow control valve (8) is arranged on the circulating water purification pipe and is located upstream of the circulating booster pump group (5). The controller is electrically connected to the first booster pump, the second booster pump, the flow detection element (6) and the flow control valve (8). The controller is used to control the opening and closing and the opening degree of the flow control valve (8) according to the flow detected by the flow detection element (6) and to control whether the first booster pump and the second booster pump are working according to the opening and closing and the opening degree of the flow control valve (8).

3. The secondary water supply system according to claim 2, characterized in that: The water treatment device comprises an activated carbon adsorption device (11) and a membrane treatment device (12), and the circulating water purification pipe is an antibacterial stainless steel pipe (4).

4. The secondary water supply system according to claim 3, characterized in that: The secondary water supply system further comprises a first pressure detection component (15) and a second pressure detection component (16), wherein the first pressure detection component (15) is arranged at the water inlet front end of the activated carbon adsorption device (11), and the second pressure detection component (16) is arranged at the water outlet rear end of the activated carbon adsorption device (11), and the controller is used to judge whether the activated carbon adsorption device (11) needs to be replaced based on the difference between the pressure detected by the first pressure detection component (15) and the pressure detected by the second pressure detection component (16).

5. The secondary water supply system according to claim 4, characterized in that: The secondary water supply system further comprises a third pressure detection component (17) and a backwash pipe (18); the third pressure detection component (17) is arranged at the water outlet rear end of the membrane treatment device (12); one end of the backwash pipe (18) is connected to the backwash port of the membrane treatment device (12) and the other end is connected to the water inlet front end of the activated carbon adsorption device (11); the controller is used to control whether the membrane treatment device (12) is backwashed according to the difference between the pressure detected by the second pressure detection component (16) and the pressure detected by the third pressure detection component (17).

6. The secondary water supply system according to any one of claims 1 to 5, characterized in that: The secondary water supply system further comprises a water supply pipe (7) and a liquid level valve; the water inlet of the water supply tank (1) is connected to the water supply pipe (7); the liquid level valve comprises a main valve (901) and a pilot valve (902); the main valve (901) is arranged on the water supply pipe (7); and the pilot valve (902) is arranged in the water supply tank (1).

7. The secondary water supply system according to any one of claims 1 to 5, characterized in that: The flow rate of the first pressurizing pump is smaller than the flow rate of the second pressurizing pump.

8. The secondary water supply system according to any one of claims 2 to 5, characterized in that: A one-way valve (10) is provided on the circulating clean water pipe. The one-way valve (10) is located downstream of the flow detection component (6). The one-way valve (10) is suitable for allowing clean water to flow from the flow detection component (6) to the water treatment device and preventing clean water in the water treatment device from flowing to the flow detection component (6).

9. The secondary water supply system according to any one of claims 1 to 5, characterized in that: The swirl pot (2) is provided with a vacuum suppressor (13).

10. The secondary water supply system according to any one of claims 1 to 5, characterized in that: The volume of the water supply tank (1) is twice the preset water volume.

Images