Water purification system for formation water

Abstract

The utility model discloses a water purification system aiming at formation water. The water purification system comprises a pre-filter, a water inlet electromagnetic valve, a booster pump, a quartz sand filtering device, an activated carbon filtering device, a water softening treatment device, a composite filter element assembly, a pressure release valve, a blow-down valve, a self-priming pump, a water storage device and a purified water outlet faucet. In order to mainly solve the problems of poor water purification effect and filter element blockage when a conventional water purification system purifies formation water, a prefilter is used for removing most silt in water, a quartz sand filtering device is used for removing residual silt, colloids and suspended matters in water, and an activated carbon filtering device is used for removing peculiar smell, viruses and small molecular organic matters in water; the water softening device is used for removing calcium and magnesium ions in water to prevent a filter element from scaling, PP cotton in the composite filter element is used for filtering residual carbon powder and small-molecule impurities in pre-filtration to further prevent the filter element from being blocked, and finally, the RO membrane filter layer is used for filtering the filter element; and 0.0001 micron impurities are filtered out, so that the formation water is purified. Meanwhile, the pressure release valve is arranged between the water outlet of the water softening device and the water inlet of the composite filter element, so that the pressure stabilizing effect is achieved, and the filter element is prevented from being blocked due to overhigh water pressure. In conclusion, according to the water purification system, the problem that the filter element of a common water purification system is easy to block is solved while targeted filtration of the formation water is realized, the service life of the filter element is greatly prolonged, and the water purification cost is reduced.

Description

Technical Field

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

[0002] In remote well stations and field operation sites, due to the high transportation costs, the best way is to solve the drinking water problem for employees by extracting formation water. Conventional water purification systems are often unable to filter out all small molecular organic matter and viruses in formation water, resulting in poor water quality. At the same time, formation water contains abundant calcium and magnesium ions, sediment, colloids, and suspended matter, which are important factors that cause filter element blockage. On-site use requires frequent replacement of filter elements, which increases the cost of water purification while also greatly reducing water purification efficiency. Summary of the invention

[0003] The utility model aims to solve the two major problems of formation water purification quality and frequent filter element replacement caused by clogging. To this end, the utility model proposes a water purification system for formation water, which can filter and adsorb small molecular organic matter and viruses that cannot be completely filtered by conventional water purification systems, thereby improving the quality of purified water; it can also effectively filter out calcium and magnesium ions, silt, colloids, and suspended matter in the water at the front end of the filter element to prevent the filter element from being blocked; at the same time, the filter element structure is optimized to add a PP cotton filter layer in front of the RO membrane filter layer, thereby preventing residual carbon powder in the water from clogging the filter element, thereby reducing the water purification cost and improving the water purification efficiency.

[0004] The water purification system according to the embodiment of the utility model comprises: a pre-filter, wherein the pre-filter 1 is connected to the water inlet of the water purification system; a water inlet solenoid valve, wherein the water inlet solenoid valve 2 is connected to the water outlet of the pre-filter 1; a booster pump, wherein the booster pump 3 is connected in series downstream of the water inlet solenoid valve 2; a quartz sand filter device, wherein the quartz sand filter device is connected in series downstream of the water outlet of the booster pump 3; an activated carbon filter device, wherein the activated carbon filter device is connected in series between the quartz sand filter device and the water softening treatment device; a water softening treatment device, wherein the water softening treatment device is connected to the water outlet of the activated carbon filter device; a pressure relief valve, wherein the pressure relief valve 7 is located at the water softening treatment device. It is arranged between the clean water outlet and the water inlet of the composite filter element assembly, and is connected in series to the connecting pipe between the water outlet pipe of the water softening treatment device and the sewage pipe; the composite filter element assembly, the water inlet of the composite filter element assembly 8 is connected in series to the downstream of the water outlet valve three 63; the water storage device, the water storage device 9 is connected to the clean water outlet of the composite filter element assembly 8; the self-priming pump, the self-priming pump two 10 is connected in series between the water storage device 9 and the clean water outlet faucet 12; the clean water interlock switch, the clean water interlock switch 11 is connected in series between the self-priming pump 10 and the clean water outlet faucet; the clean water outlet faucet, the clean water outlet faucet 12 is connected in series to the downstream of the clean water interlock switch 11.

[0005] According to some embodiments of the utility model, the quartz sand filtering device includes: a three-way valve 41, which is connected to the raw water inlet and the backwash inlet of the quartz sand tank 4, and is connected in series between the quartz sand tank 4 and the booster pump 3; a drain valve 42, which is connected to the drain outlet of the quartz sand tank 4; a water outlet valve 43, which is connected to the water outlet of the quartz sand tank 4; a backwash interlock switch 44, which is connected in series to the pressure measuring pipe in parallel with the quartz sand tank 4, and is used to detect the pressure difference between the inlet and outlet of the quartz sand tank 4, and communicates with the three-way valve 41, the water outlet valve 43, and the drain valve 42 respectively.

[0006] According to some embodiments of the utility model, the activated carbon filtering device includes: a three-way valve 51, which is connected to the raw water inlet and the backwash inlet of the activated carbon tank 5, and is connected in series between the activated carbon tank 5 and the water outlet valve 43 of the quartz sand tank 4; a drain valve 52, which is connected to the drain outlet of the activated carbon tank 5; a water outlet valve 53, which is connected to the water outlet of the activated carbon tank 5; a backwash interlock switch 54, which is connected in series to the pressure measuring pipe in parallel with the activated carbon tank 5, and is used to detect the pressure difference between the inlet and outlet of the activated carbon tank 5, and communicate with the three-way valve 51, the water outlet valve 53, and the drain valve 52 respectively.

[0007] According to some embodiments of the utility model, the water softening treatment device includes: a three-way valve three 61, which is connected to the raw water inlet and the backwash inlet of the resin tank 6, and is connected in series between the resin tank 6 and the activated carbon tank 5 outlet valve two 53; a sewage valve three 62, which is connected to the sewage outlet of the resin tank 6; an outlet valve three 63, which is connected to the outlet of the resin tank 6; a self-priming pump, a brine outlet valve, a self-priming pump one 66 and a brine outlet valve 67 are connected in series on the pipeline between the resin tank 6 and the brine tank 65; a backwash interlock switch three 64 is connected in series to the pressure measuring pipe in parallel with the resin tank 6, which is used to detect the inlet and outlet pressure difference of the resin tank 6, and communicates with the three-way valve three 61, the outlet valve three 63, the sewage valve three 62, the brine outlet valve 67, and the self-priming pump one 66 respectively.

[0008] According to some embodiments of the present utility model, the pressure relief valve 7 is connected in series to the connecting pipe between the water outlet pipe and the sewage pipe of the water softening treatment device, and is used for controlling the pipe pressure before the composite filter element assembly 8 enters water.

[0009] According to some embodiments of the utility model, the composite filter element assembly 8 includes: a shell, on which the water source inlet, the pure water outlet, and the sewage outlet are formed; a connecting kit, which separates the water source inlet and the sewage outlet; a composite filter element, which is arranged in the shell, and the composite filter element includes two filter layers of PP cotton and RO membrane, and the RO membrane separates the pure water outlet and the sewage outlet.

[0010] According to some embodiments of the utility model, the water storage device also includes a water level detection switch, which is not drawn in the figure. It communicates with the water purification interlock switch 11, the water inlet solenoid valve 2, and the booster pump 3 respectively. When the water purification faucet 12 is closed, the water level detection switch controls the opening and closing of the solenoid valve 2 and the booster pump 3 according to the water level of the water storage device.

[0011] According to some embodiments of the utility model, the water purification system interlock switch 11 communicates with the water level detection switch, the water inlet solenoid valve 2, and the booster pump 3 respectively. The water purification interlock switch and the water level detection switch control the opening and closing of the corresponding valves and the start and stop of the pump according to the water pressure and water level. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of an example water purification system according to the implementation of the utility model;

[0013] Figure 2 is a cross-sectional view of a composite filter element of a water purification system according to an embodiment of the utility model;

[0014] Figure 3 It is a schematic diagram of a composite filter element of a water purification system according to an embodiment of the utility model.

[0015] Reference numerals:

[0016] Pre-filter 1, water inlet solenoid valve 2, booster pump 3, quartz sand tank 4, three-way valve 1 41, drain valve 1 42, water outlet valve 1 43, backwash interlock switch 1 44, activated carbon tank 5, three-way valve 2 51, drain valve 2 52, water outlet valve 2 53, backwash interlock switch 2 54, resin tank 6, three-way valve 3 61, drain valve 3 62, water outlet valve 3 63, backwash interlock switch 3 64, brine tank 65, self-priming pump 1 66, brine outlet valve 67, pressure relief valve 7, composite filter element assembly 8, water storage device 9, self-priming pump 2 10, clean water interlock switch 11, clean water outlet faucet 12.

[0017] Shell 13, connection kit 14, PP cotton 15, RO membrane 16, clean water collecting pipe 17, sealing leather cup 18, water source inlet 19, clean water outlet 20, sewage outlet 21, sealing ring 22, rotatable sealing cover 23, rotating handle 24. DETAILED DESCRIPTION

[0018] like Figure 1 As shown, a water purification system for formation water according to an embodiment of the utility model includes a pre-filter, a water inlet solenoid valve, a booster pump, a quartz sand filter device, an activated carbon filter device, a water softening treatment device, a pressure relief valve, a composite filter element assembly, a water storage device, a self-priming pump, a water purification interlock switch, a water purification outlet faucet, and a check valve.

[0019] The pre-filter 1 is connected to the water inlet of the water purification system, and is mainly used to filter the silt, rust and large particles in the formation water. While protecting the booster pump 3, it also reduces the filtering pressure of the rear-end filtering device and prolongs its service life.

[0020] The water inlet solenoid valve 2 and the booster pump 3 are serially connected in sequence to the downstream pipeline of the pre-filter 1. The booster pump 3 is used to increase the pressure of the water inlet of the filtering device, and the water inlet solenoid valve 2 is used to open and close the water inlet.

[0021] The quartz sand filtration device includes a quartz sand tank 4, a three-way valve 41, a drain valve 42, a water outlet valve 43, and a backwash interlock switch 44. The three-way valve 41 is connected to the raw water inlet and the backwash inlet of the quartz sand tank 4, and the three-way valve 41 is used to switch between water purification and backwashing. During normal water purification, the left and right valve ports of the three-way valve 41 are opened, the lower valve port is closed, and the water from the booster pump 3 flows through the three-way valve 41 into the clean water inlet at the top of the quartz sand tank 4; when the equipment is backwashing, the lower left valve port of the three-way valve 41 is opened, the right valve port is closed, and the water from the booster pump 3 flows through the three-way valve 41 into the lower backwash pipe inlet of the quartz sand tank 4. The quartz sand tank 4 is connected in series to the clean water pipeline downstream of the booster pump 3, and is connected to the outlet pipeline of the right valve port of the three-way valve 41. The quartz sand tank 4 mainly filters the residual sediment, colloids, and suspended matter in the formation water. The sewage valve 42 is connected to the sewage outlet of the quartz sand tank 4, and the sewage valve 42 is used for sewage discharge during the backwashing process of the quartz sand filter device. The water outlet valve 43 is connected to the water outlet of the quartz sand tank 4, and the water outlet valve 43 is used to close and open the clean water outlet. When the quartz sand filter device is purifying water normally, the water outlet valve 43 opens the clean water outlet channel, and when the equipment is backwashing, the water outlet valve 43 closes the clean water outlet channel. The backwash interlock switch 44 is connected in series to the backwash pipeline in parallel with the quartz sand tank 4. The backwash interlock switch 44 is used to detect the differential pressure between the inlet and outlet of the quartz sand tank 4 and control the switching of the clean water and backwashing functions. When the backwash interlock switch 44 detects that the differential pressure between the inlet and outlet of the quartz sand tank 4 reaches the set value, the backwash interlock switch 44 is closed, the interlock is triggered, the right valve port of the three-way valve 41 is closed and the lower valve port is opened, the outlet valve 43 is closed, and the sewage valve 42 is opened, and the equipment enters the backwash state. Water flows through the three-way valve 41 into the backwash pipe, and flows in from the bottom of the quartz sand tank 4 through the backwash pipe. After flushing the filter medium in the tank, the water flows out from the sewage valve 42 with the filtered impurities. When the backwash time reaches the set time limit, the reset interlock is triggered, the left and right valve ports of the three-way valve 41 are opened, the lower valve port is closed, the sewage valve 42 is closed, the outlet valve 43 is opened, the backwash interlock switch 44 is pressure-disconnected and reset, and the equipment enters the water purification state. Water flows through the three-way valve 41 and enters the water inlet at the top of the quartz sand tank 4. The purified water after entering the quartz sand tank 4 from the water inlet and filtering flows out from the water outlet valve 43.

[0022] The activated carbon filtration device includes an activated carbon tank 5, a three-way valve 51, a drain valve 52, a water outlet valve 53, and a backwash interlock switch 54. The three-way valve 51 is connected to the raw water inlet and the backwash inlet of the activated carbon tank 5, and the three-way valve 51 is used to switch between water purification and backwashing. During normal water purification, the left and right valve ports of the three-way valve 51 are opened, the lower valve port is closed, and the water coming out of the water outlet valve 43 flows through the three-way valve 51 into the clean water inlet at the top of the activated carbon tank 5; when the equipment is backwashing, the lower left valve port of the three-way valve 51 is opened, the right valve port is closed, and the water coming out of the water outlet valve 43 flows through the three-way valve 51 into the lower backwash pipe inlet of the activated carbon tank 5. The activated carbon tank 5 is connected in series to the clean water pipeline downstream of the outlet valve 1 43 of the quartz sand filter device, and is connected to the outlet pipeline of the right valve port of the three-way valve 2 51. The activated carbon tank 5 mainly filters small molecular organic matter, viruses, and odors in the formation water. The sewage valve 2 52 is connected to the sewage outlet of the activated carbon tank 5, and the sewage valve 2 52 is used for sewage discharge during the backwashing process of the activated carbon filter device. The outlet valve 2 53 is connected to the outlet of the activated carbon tank 5, and the outlet valve 2 53 is used to close and open the outlet of the clean water. When the activated carbon filter device is purifying water normally, the outlet valve 2 53 opens the clean water outlet channel, and when the activated carbon filter device is backwashing, the outlet valve 2 53 closes the clean water outlet channel. The backwash interlock switch 2 54 is connected in series to the backwash pipeline in parallel with the activated carbon tank 5. The backwash interlock switch 2 54 is used to detect the differential pressure of the inlet and outlet of the activated carbon tank 5 and control the switching of the clean water and backwashing functions. When the backwash interlock switch 254 detects that the differential pressure of the water inlet and outlet of the activated carbon tank 5 reaches the set value, the backwash interlock switch 254 is closed, the interlock is triggered, the right valve port of the three-way valve 251 is closed and the lower valve port is opened, the outlet valve 253 is closed, and the sewage valve 252 is opened, and the equipment enters the backwash state. Water flows through the three-way valve 251 into the backwash pipe, and flows in from the bottom of the activated carbon tank 5 through the backwash pipe. After flushing the filter medium in the tank, the water carries the filtered impurities and flows out from the sewage valve 252. When the backwash time reaches the set time limit, the reset interlock is triggered, the left and right valve ports of the three-way valve 251 are opened, the lower valve port is closed, the sewage valve 252 is closed, the outlet valve 253 is opened, the backwash interlock switch 254 is disconnected under pressure and reset, and the equipment enters the water purification state. Water flows through the three-way valve 251 and flows into the water inlet at the top of the activated carbon tank 5. The purified water after entering the activated carbon tank 5 from the water inlet and filtering flows out from the outlet valve 253.

[0023] The water softening treatment device includes a resin tank 6, a three-way valve 3 61, a drain valve 3 62, a water outlet valve 3 63, a backwash interlock switch 3 64, a brine tank 65, a self-priming pump 1 66, and a brine outlet valve 67. The three-way valve 3 61 is connected to the raw water inlet and the backwash inlet of the resin tank 6, and the three-way valve 3 61 is used for switching between water purification and backwashing. During normal water purification, the left and right valve ports of the three-way valve 3 61 are opened, the lower valve port is closed, and the water coming out of the activated carbon filter device flows through the three-way valve 3 61 into the clean water inlet at the top of the resin tank 6; when the water softening treatment device is backwashing, the lower left valve port of the three-way valve 3 61 is opened, the right valve port is closed, and the water coming out of the activated carbon filter device flows through the three-way valve 3 61 into the backwash pipe inlet at the bottom of the resin tank 6. The resin tank 6 is connected in series to the clean water pipeline downstream of the activated carbon filter device, and is connected to the outlet pipeline of the right valve port of the three-way valve 61. The resin tank 6 mainly filters the calcium and magnesium ions in the formation water. The main principle is that the sodium ions on the resin exchange ions with the calcium and magnesium ions in the formation water. In this exchange process, the resin adsorbs calcium and magnesium ions and releases sodium ions into the water at the same time, and finally softens the water quality. The water softening treatment can prevent the scale on the surface of the filter layer of the composite filter element assembly from clogging the filter element. The sewage valve 3 62 is connected to the sewage outlet of the resin tank 6, and the sewage valve 3 62 is used for sewage discharge during the backwashing process of the water softening treatment device. The water outlet valve 3 63 is connected to the water outlet of the resin tank 6, and the water outlet valve 3 63 is used to close and open the clean water outlet. When the water softening treatment device is purifying water normally, the water outlet valve 3 63 opens the clean water outlet channel, and when the water softening treatment device is backwashing, the water outlet valve 3 63 closes the clean water outlet channel. The brine tank 65 is connected to the resin tank 6 through a pipeline, and the brine tank 65 is used to store concentrated brine. The self-priming pump 1 66 is connected in series to the pipeline connecting the resin tank 6 and the brine tank 65, and the self-priming pump 1 66 is used to extract the concentrated brine and transport it into the resin tank 6. The brine outlet valve 67 is connected in series to the pipeline connecting the self-priming pump 1 66 and the resin tank 6, and the brine outlet valve 67 controls the closing and opening of the brine outlet. The backwash interlock switch 3 64 is connected in series to the backwash pipeline in parallel with the resin tank 6, and the backwash interlock switch 3 64 is used to detect the differential pressure between the inlet and outlet of the resin tank 6 and control the switching of the water purification and backwash functions. When the backwash interlock switch 3 64 detects that the differential pressure of the water inlet and outlet of the resin tank 6 reaches the set value, the backwash interlock switch 3 64 is closed, the interlock is triggered, the right valve port of the three-way valve 3 61 is closed and the lower valve port is opened, the outlet valve 3 63 is closed, the drain valve 3 62 is opened, the brine outlet valve 67 is opened, the self-priming pump 1 66 is started, and the water softening treatment device enters the backwash state. The raw water flows through the three-way valve 3 61 into the backwash pipe, flows in from the bottom of the resin tank 6 through the backwash pipe, and the concentrated brine enters the resin tank 6 through the self-priming pump 1 66 and the brine outlet valve 67. After the calcium and magnesium ions are replaced by ion exchange in the resin tank 6, the water carries the calcium and magnesium ions and flows out from the drain valve 3 62.When the backwash time reaches the set time limit, the reset interlock is triggered, the left and right valve ports of the three-way valve 3 61 are opened, the lower valve port is closed, the sewage valve 3 62 is closed, the outlet valve 3 63 is opened, the brine outlet valve 67 is closed, the self-priming pump stops working, the backwash interlock switch 3 64 is pressure-disconnected and reset, and the water softening treatment device enters the water purification state. Water flows through the three-way valve 3 61 and flows into the water inlet at the top of the resin tank 6. It enters the resin tank 6 from the water inlet and flows out from the outlet valve 3 63 after ion exchange with the resin.

[0024] In summary, through the backwash interlock switch 1 44, the backwash interlock switch 2 54, and the backwash interlock switch 3 64, the automatic backwash operation of the quartz sand filter device, the activated carbon filter device, and the water softening treatment device can be realized, ensuring that the operation and maintenance of the water purification system is not affected by human factors, and improving the stability of equipment operation.

[0025] The pressure relief valve 7 is connected in series to the pipeline connecting the water outlet pipe of the water softening treatment device and the sewage pipe of the water softening treatment device, and is connected to the water outlet and sewage outlet of the water softening treatment device. The pressure relief valve 7 is used for stabilizing the pressure before the water inlet of the composite filter element assembly 8. When the pressure before the valve is higher than a certain limit value, the pressure relief valve 7 will automatically open to release the pressure, and discharge the water flow in the water outlet pipe into the sewage pipe. After the pressure relief pressure value is set to the pressure value required for the composite filter element assembly to maintain normal operation, the system can achieve pressure stabilization control, which is not affected by temperature and water quality, and prevents the filter element from being blocked due to excessively high clean water flow, further improving the stability of the operation of the composite filter element assembly.

[0026] like Figure 1 As shown, the water inlet of the composite filter element assembly 8 is connected to the water outlet of the softening water treatment device, the water outlet of the composite filter element assembly 8 is connected to the water inlet of the water storage device 9, and the sewage pipe of the composite filter element assembly 8 finally converges to the main sewage pipe line. The water flows into the composite filter element assembly 8 from the water inlet on the left for filtration, and the filtered water is divided into two parts: one part is pure water and can flow out from the pure water outlet in the middle, and the other part is wastewater with a higher impurity concentration and can flow out from the sewage outlet on the right. Figure 2The composite filter element assembly shown comprises a housing 13, a connection kit 14, PP cotton 15, an RO membrane 16, a clean water collecting pipe 17, a sealing leather cup 18, a water source inlet 19, a clean water outlet 20, a sewage outlet 21, a sealing ring 22, a rotatable sealing cover 23, and a rotary handle 24. The housing 13 is formed with a water source inlet 19, a clean water outlet 20, and a sewage outlet 21. The connection kit 14 is arranged in the housing 13, and the PP cotton 15 and the RO membrane 16 are fixed by the connection kit 14 and the sealing leather cup 18. The water source inlet 19, the clean water outlet 20, and the sewage outlet 21 are separated by the connection kit 14 and the filter layer of the RO membrane 16. The water entering from the water source inlet 19 is first filtered through the PP cotton 15 to filter out the carbon powder and small molecular impurities remaining after the upstream filtering device is filtered, which can prevent the clogging of the RO membrane 16 filter layer, and finally finely filtered through the RO membrane 16 to purify the formation water. The water filtered by the RO membrane 16 is divided into two parts, one part is pure water, which flows out from the clean water outlet 20 through the clean water collection pipe 17, and the other part is wastewater with a high impurity concentration and can flow out from the sewage outlet 21.

[0027] Further, refer to Figure 2 In order to allow the wastewater that cannot pass through the RO filter layer to be discharged smoothly, the lower part of the RO filter layer is opened to allow the wastewater to flow out from the lower part of the RO membrane filter layer. The entire exterior of the filter element is wrapped by the connection kit 14, and the water source and wastewater are separated by the connection kit 14. Therefore, the wrapping structure design of the connection kit prevents the filter element from being immersed in wastewater for a long time, and the wastewater with a certain residual pressure flows back into the filter layer to block the filter element.

[0028] The water storage device 9 includes a water level detection switch, which communicates with the water inlet solenoid valve 2 and the booster pump 3, and can control the opening and closing of the water inlet solenoid valve 2 and the start and stop of the booster pump 3 according to the water level in the water storage device.

[0029] The self-priming pump 10 is connected in series between the water storage device 9 and the purified water outlet faucet 12. The function of the self-priming pump 10 is to transport the water in the water storage device to the purified water outlet faucet end.

[0030] The water purification interlock switch 11 is connected in series between the self-priming pump 10 and the water purification faucet 12. The water purification interlock switch communicates with the water level detection switch, the water inlet solenoid valve 2, the booster pump 3, and the self-priming pump 10 respectively, and plays a role in controlling the start and stop of the water purification function of the water purification system according to the switch status of the water purification faucet.

[0031] The clean water outlet faucet 12 is connected in series downstream of the clean water interlock switch 11, and the purpose of the clean water outlet faucet 12 is to control the switch of the clean water. When the clean water outlet faucet 12 is turned on, the clean water interlock switch 11 is closed by pressure relief, the water inlet solenoid valve 2 is opened, the booster pump 3 is started, and the self-priming pump 2 10 is started to pump out the clean water in the water storage device 9 and transport it to the clean water outlet faucet 12; when the clean water outlet faucet 12 is closed, the clean water interlock switch 11 is disconnected under pressure, and the self-priming pump 2 10 stops running. At this time, the clean water interlock switch 11 sends a signal to the water level detection switch, and the water level detection switch controls whether the water inlet solenoid valve 2 and the booster pump 3 are closed or opened according to the water level in the water storage device 9. When the water level in the water storage device 9 reaches the set water level, the water inlet solenoid valve 2 and the booster pump 3 are closed. When the water level in the water storage device 9 is lower than the set water level, the water inlet solenoid valve 2 and the booster pump 3 are opened, and the water purification system continues to purify water. When the water level in the water storage device 9 reaches the set water level, the water inlet solenoid valve 2 and the booster pump 3 are closed again.

Claims

1. A water purification system for formation water, characterized in that: include: A pre-filter, wherein the pre-filter (1) is connected to a water inlet of the system; A water inlet solenoid valve, the water inlet solenoid valve (2) is connected in series downstream of the pre-filter (1); A booster pump, the booster pump (3) is connected in series downstream of the water inlet solenoid valve (2); A quartz sand filter device, the quartz sand filter device comprising a quartz sand tank (4), a three-way valve (41), a sewage valve (42), a water outlet valve (43), and a backwash interlock switch (44); An activated carbon filter device, the activated carbon filter device comprising an activated carbon tank (5), a second three-way valve (51), a second sewage valve (52), a second water outlet valve (53), and a second backwash interlock switch (54); A water softening treatment device, the water softening treatment device comprising a resin tank (6), a three-way valve (61), a drain valve (62), a water outlet valve (63), a backwash interlock switch (64), a brine tank (65), a self-priming pump (66), and a brine outlet valve (67); A pressure relief valve, wherein the pressure relief valve (7) is connected in series to a pipeline connecting a water outlet pipeline of the water softening treatment device and a sewage discharge pipeline of the water softening treatment device; A composite filter element assembly, the composite filter element assembly (8) comprising a water source inlet, a pure water outlet, and a sewage outlet; A water storage device, wherein the water storage device (9) is connected to the water outlet of the composite filter element; A second self-priming pump, wherein the second self-priming pump (10) is connected to a water outlet of the water storage device (9); A water purification interlock switch, wherein the water purification interlock switch (11) is connected in series downstream of the second self-priming pump (10); A purified water outlet faucet, wherein the purified water outlet faucet (12) is connected in series downstream of the purified water interlock switch (11).

2. A water purification system for formation water according to claim 1, characterized in that: A three-way valve (41) in the quartz sand filtering device is connected to the raw water inlet and the backwash inlet of the quartz sand tank (4), and is connected in series between the quartz sand tank (4) and the booster pump (3); a sewage valve (42) is connected to the sewage outlet of the quartz sand tank (4); a water outlet valve (43) is connected to the water outlet of the quartz sand tank (4); a backwash interlock switch (44) is connected in series to the pipeline connecting the water inlet and outlet of the quartz sand tank (4), and is used to detect the pressure difference in the quartz sand tank (4), and communicate with the three-way valve (41), the water outlet valve (43), and the sewage valve (42) respectively.

3. A water purification system for formation water according to claim 1, characterized in that: The three-way valve 2 (51) in the activated carbon filter device is connected to the raw water inlet and the backwash inlet of the activated carbon tank (5), and is connected in series between the activated carbon tank (5) and the water outlet valve 1 (43) of the quartz sand tank (4). The sewage valve 2 (52) is connected to the sewage outlet of the activated carbon tank (5), and the water outlet valve 2 (53) is connected to the water outlet of the activated carbon tank (5). The backwash interlock switch 2 (54) is connected in series to the pipeline connected in parallel with the activated carbon tank (5) and is used to detect the pressure difference in the activated carbon tank (5), and communicate with the three-way valve 2 (51), the water outlet valve 2 (53), and the sewage valve 2 (52) respectively.

4. A water purification system for formation water according to claim 1, characterized in that: The three-way valve three (61) in the water softening treatment device is connected to the raw water inlet and the backwash inlet of the resin tank (6), and is connected in series between the outlet of the activated carbon tank (5) and the inlet of the resin tank (6); the sewage valve three (62) is connected to the sewage outlet of the resin tank (6); the outlet valve three (63) is connected to the outlet of the resin tank (6); the salt water outlet valve (67) and the self-priming pump one (66) are connected in series on the pipeline between the resin tank (6) and the salt water tank (65); the backwash interlock switch three (64) is connected in series on the pipeline parallel to the resin tank (6) and is used to detect the pressure difference in the resin tank (6) and communicate with the three-way valve three (61), the outlet valve three (63), the sewage valve three (62), the salt water outlet valve (67) and the self-priming pump one (66) respectively.

5. A water purification system for formation water according to claim 1, characterized in that: The composite filter element assembly comprises: A shell, on which the water source inlet, the pure water outlet, and the sewage outlet are formed; A connection kit, wherein the connection kit separates the water source inlet and the sewage outlet; A composite filter element is arranged in the shell, and the composite filter element comprises two filter layers of PP cotton and RO membrane, and the RO membrane separates the pure water outlet and the sewage outlet.

6. A water purification system for formation water according to claim 1, characterized in that: The water storage device further comprises a water level detection switch, which communicates with a water purification interlock switch (11) connected in series downstream of the water storage device (9), the water inlet solenoid valve, and the booster pump. When the water purification outlet faucet is closed, the water level detection switch controls the opening and closing of the water inlet solenoid valve (2) and the booster pump (3) according to the water level of the water storage device (9).

7. A water purification system for formation water according to claim 1, characterized in that: The water purification interlock switch (11) communicates with the water inlet solenoid valve (2), the booster pump (3), and the second self-priming pump (10) respectively, and the water purification interlock switch controls the opening and closing of the water inlet solenoid valve (2), the booster pump (3), and the second self-priming pump (10) according to the water pressure.

8. A water purification system for formation water according to claim 1, characterized in that: The quartz sand filter device only discharges waste during backwashing.

9. A water purification system for formation water according to claim 1, characterized in that: The composite filter element assembly only discharges waste water when purifying water.

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