CN118005119A - Environmentally friendly water purification system and control method thereof - Google Patents

Abstract

The invention discloses an environment-friendly water purification system and a control method thereof, which can improve the waste water utilization rate of a filtering type water purifier in the prior art, reduce the discharge of concentrated water and achieve the aim of saving water. The device filter, first booster pump, water purification holding vessel, dense water holding vessel, second booster pump, evaporation tank, cold heat exchanger and distilled water holding vessel, through the evaporation tank is right the dense water that the filter produced distills, and pass through cold heat exchanger comdenstion water vapor obtains distilled water and collects, not only avoids a large amount of filtration back dense water and waste water by the environmental pollution problem that the direct emission caused, has still indirectly widened the range of application of dense water and waste water, reaches the water conservation purpose.

Description

Environmentally friendly water purification system and control method thereof

Technical Field

The invention belongs to the field of water purification equipment, and in particular relates to an environmentally friendly water purification system and a control method thereof.

Background technique

Water is the substance that human beings depend on for survival. The quality of domestic water is also closely related to human health. With the development of water purification equipment, people have higher demands on the quality of drinking water and daily water, as well as water conservation. Improving the quality of purified water while reducing the concentration rate is also the future development direction of water purification equipment.

In the prior art, a Chinese utility model patent with publication number CN213141622U discloses a water purifier that is easy to clean a filter element. The water purifier includes a filter, a first water conduit and a second water conduit are fixedly connected at the bottom of the water inlet pipe of the filter, one end of the first water conduit is fixedly connected to the bottom of one side of the filter, one end of the second water conduit is fixedly connected to the top of the other side of the filter, a water outlet valve is arranged on the second water conduit, a water inlet valve is arranged on the first water conduit, and a circulation pump is arranged on the first water conduit. When the filter is working normally, water in the water inlet pipe enters through the first water conduit and enters the filter through the circulation pump, and the water in the filter flows out through the second water conduit and flows back to the water inlet pipe. The direction of water flow through the filter is bottom-in and top-out; when the filter element in the filter needs to be backwashed, the water inlet valve is closed, the water outlet valve is kept open, and then the drain valve at the bottom of the filter is opened. Under the action of the pressure difference, water passes through the filter element in the filter in the reverse direction, so as to achieve the purpose of manually backwashing the filter element in the filter. Although the device can clean the filter of the water purifier to a certain extent, the concentrated water after backwashing needs to be discharged in time, and it is contaminated by the flushing agent and cannot be reused. Even if the device can reduce the number of times the filter element is replaced, the backwashing frequency can only be increased when the water quality is poor, which undoubtedly wastes a lot of fresh water. In addition, the existing technology for recycling the remaining concentrated water after filtering the water purifier is relatively simple. Since the concentrated water contains high concentrations of metal particles, impurities and bacteria, it is not only troublesome to collect, but also cannot be directly used as domestic water. The ratio of clean water to concentrated water in most filter-type water purifiers is not less than one to three, and its water-saving effect is self-evident.

Summary of the invention

Based on the above background technology needs, the present invention discloses an environmentally friendly water purification system, which can improve the wastewater utilization rate of the filtering water purifier in the prior art, reduce the concentrated water discharge, and achieve the purpose of water saving.

To achieve the above object, the technical solution of the present invention is:

An environmentally friendly water purification system, characterized in that it includes: a filter, a first booster pump, a clean water storage tank, a concentrated water storage tank, a second booster pump, an evaporator, a cold and heat exchanger and a distilled water storage tank, wherein the filter is used to filter tap water, and the filter is provided with a filter outlet and a drain outlet; the water inlet of the first booster pump is connected to the filter outlet; the clean water storage tank is provided with a clean water inlet and a normal temperature water outlet, the normal temperature water outlet is provided with a first outlet valve, and the clean water inlet is connected to the water outlet of the first booster pump; the concentrated water storage tank is provided with a concentrated water inlet and a concentrated water outlet, and the concentrated water inlet is connected to the drain outlet; the water inlet of the second booster pump is connected to the concentrated water outlet; the evaporator is provided with a heater, an evaporator inlet and a steam outlet, the heater is used to heat the evaporator, and the evaporator inlet is connected to the water outlet of the second booster pump; the cold and heat exchanger is used to form distilled water, and the cold and heat exchanger is provided with a steam inlet and a condensation outlet, and the steam inlet is connected to the steam outlet; the distilled water storage tank is provided with a distilled water inlet, and the distilled water inlet is connected to the condensation outlet.

Preferably, the heat exchanger is further provided with a water replenishment port, and the clean water storage tank is further provided with a clean water overflow port, and the water replenishment port is connected to the clean water overflow port.

Preferably, the heat exchanger is further provided with a first liquid level sensor, and the first liquid level sensor is electrically connected to the first boost pump.

Preferably, the heat exchanger is further provided with a temperature sensor, and the temperature sensor is electrically connected to the heater.

Preferably, the evaporation tank is further provided with a second liquid level sensor, and the second liquid level sensor is electrically connected to the heater.

Preferably, the evaporation tank is further provided with a TDS detector and a sewage outlet, the sewage outlet is provided with a sewage discharge control valve, and the TDS detector is electrically connected to the sewage discharge control valve.

Preferably, the heat exchanger is further provided with a hot water outlet, and a second water outlet valve is provided at the hot water outlet.

Preferably, the distilled water storage tank is also provided with a distilled water outlet, and a third water outlet valve is provided at the distilled water outlet.

A control method for an environmentally friendly water purification system comprises the following steps:

s1. Obtaining the cooling water level in the heat exchanger compared with the first standard level, when the cooling water level is greater than or equal to the first standard level, the first booster pump remains closed, and when the cooling water level is less than the first standard level, the first booster pump is started to add cooling water to the heat exchanger;

s2. Obtaining the concentrated water level in the evaporation tank compared with the second standard level, when the concentrated water level is greater than or equal to the second standard level, the second boost pump remains closed and the heater is turned on, when the concentrated water level is less than the second standard level, the second boost pump is started;

s3. Obtain the cooling water temperature in the heat exchanger and compare it with the standard temperature. When the cooling water temperature is greater than or equal to the standard temperature, the heater is turned off, the second water outlet valve is opened to discharge the cooling water in the heat exchanger, and step s1 is repeated; when the cooling water temperature is lower than the standard temperature, step s2 is repeated;

s4. Obtain the concentrated water TDS value in the evaporation tank and compare it with the standard TDS value. When the concentrated water TDS value is greater than or equal to the standard TDS value, open the sewage control valve; when the concentrated water TDS value is lower than the standard TDS value, repeat steps s1-s3 in sequence.

By adopting the above technical solution, compared with the prior art, the present invention has at least the following beneficial effects:

The concentrated water produced by the filter is distilled by the evaporator, and the water vapor is condensed by the heat exchanger to obtain distilled water and collect it, which not only avoids the environmental pollution problem caused by the direct discharge of a large amount of concentrated water and waste water after filtration, but also indirectly broadens the application scope of concentrated water and waste water, thereby achieving the purpose of water saving; the heat exchanger in the system introduces filtered clean water to participate in cooling, without the need to use additional cooling medium or high-power evaporator, which can effectively save energy consumption, and at the same time utilizes the cooling process to heat the filtered clean water to meet the user's demand for hot water; the system realizes the separate discharge of room temperature purified water, hot purified water and distilled water, which can basically meet the demand for domestic water.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of an environmentally friendly water purification system in one embodiment.

In the figure: filter 10, filter outlet 11, drain outlet 12, first booster pump 20, clean water storage tank 30, water inlet 31, normal temperature water outlet 32, first water outlet valve 321, clean water overflow outlet 33, concentrated water storage tank 40, concentrated water inlet 41, concentrated water outlet 42, second booster pump 50, evaporator 60, heater 61, evaporator inlet 62, steam outlet 63, second liquid level sensor 64, TDS detector 65, sewage outlet 66, sewage control valve 661, heat exchanger 70, steam inlet 71, condensation outlet 72, water replenishment port 73, first liquid level sensor 74, temperature sensor 75, hot water outlet 76, second water outlet valve 761, distilled water storage tank 80, distilled water inlet 81, distilled water outlet 82, third water outlet valve 821.

Implementation

It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The technical solution of the present invention will be further described below in conjunction with the drawings of the embodiments of the present invention, and the present invention is not limited to the following specific implementation methods.

It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "inner", "outer", "left", "right", "front", "back", "top", "bottom" and the like indicating directions or positional relationships based on the orientations or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the structure or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

The present invention will be further described in detail below with reference to the specific embodiment of FIG. 1 .

This embodiment discloses an environmentally friendly water purification system, which can improve the wastewater utilization rate of the filtering water purifier in the prior art, reduce the discharge of concentrated water, and achieve the purpose of water saving.

In one embodiment, as shown in FIG. 1 , an environmentally friendly water purification system includes a filter 10, a first booster pump 20, a clean water storage tank 30, a concentrated water storage tank 40, a second booster pump 50, an evaporation tank 60, a cold and heat exchanger 70, and a distilled water storage tank 80, wherein the filter 10 is provided with a filter outlet 11 and a drain outlet 12, the water inlet and the water outlet of the first booster pump 20 are respectively connected to the filter outlet 11 and the clean water inlet 31 of the clean water storage tank 30, and the clean water storage tank 30 is also provided with a normal temperature water outlet 32 and a first outlet valve for opening and closing the normal temperature water outlet 32 321, the concentrated water storage tank 40 is provided with a concentrated water inlet 41 and a concentrated water outlet 42, the concentrated water inlet 41 is connected to the drain outlet 12, the evaporator 60 is provided with a heater 61, an evaporator inlet 62 and a steam outlet 63, the water inlet and the water outlet of the second boosting pump 50 are respectively connected to the concentrated water outlet 42 and the evaporator inlet 62, the heater 61 is used to heat the concentrated water, the heat exchanger 70 is provided with a steam inlet 71 and a condensation outlet 72, the steam inlet 71 is connected to the steam outlet 63, the distilled water storage tank 80 is provided with a distilled water inlet 81, and the condensation outlet 71 is connected to the distilled water inlet 81.

When using the above-mentioned water purification system, the first booster pump 20 is started, and the tap water becomes soft clean water after being filtered by the filter 10, and enters the clean water storage tank 30 for temporary storage. The user can open the first water outlet valve 321 to allow the soft clean water to flow out of the constant temperature water outlet 32; each time the first booster pump 20 is started, the concentrated water or waste water generated by the filter 10 purifying the tap water enters the concentrated water storage tank 40 for temporary storage through the drainage outlet 12, and the second booster pump 50 regularly extracts the concentrated water into the evaporation tank 60, and the heater 61 heats the concentrated water in the evaporation tank 60 to distill the concentrated water; during the distillation process, the water vapor enters the cold and heat exchanger 70 through the steam inlet for cooling, and the water vapor is cooled to form distilled water and flows into the distilled water storage tank 80 for temporary storage for the user's use. Through the above process, the concentrated water and waste water can be distilled into distilled water, avoiding the direct discharge of waste water and concentrated water, and achieving the purpose of water saving.

In this embodiment, as one of the preferred solutions, the heat exchanger 70 is further provided with a water replenishment port 73 , and the clean water storage tank 30 is further provided with a clean water overflow port 33 , and the water replenishment port 73 is connected to the clean water overflow port 33 .

When using the water purification system, the cooling medium in the heat exchanger 70 is obtained through the water replenishment port 73. After the liquid level of the purified water in the purified water storage tank 30 reaches a certain height, the purified water at normal temperature is replenished to the heat exchanger 70 through the purified water overflow port 33 to reduce the temperature of the heat exchanger 70, which helps to prolong the cooling process and improve the cooling efficiency of the water vapor.

Furthermore, in this embodiment, the cold and heat exchanger 70 is also provided with a first liquid level sensor 74, and the first liquid level sensor 74 is electrically connected to the first booster pump 20. The first liquid level sensor 74 is used as a start-stop switch of the first booster pump 20, so that when the normal temperature water in the cold and heat exchanger 70 is also insufficient, the first booster pump 20 is triggered to start continuously, so that the filtered water is replenished into the cold and heat exchanger 70 through the clean water overflow port of the clean water storage tank 30. The cold and heat exchanger 70 does not need to use other cooling media, and has a certain environmental protection effect.

Furthermore, in this embodiment, the cold heat exchanger 70 is also provided with a temperature sensor 75, and the temperature sensor 75 is electrically connected to the heater 61. The temperature sensor 75 serves as one of the control switches of the heater 61. When the temperature of the water used to cool the water vapor in the cold heat exchanger 70 is too high, the cooling efficiency of the water vapor decreases, and the temperature sensor 75 controls the heater 61 to cool down or stop heating, so that the temperature of the cooling water in the cold heat exchanger 70 decreases, and at this time, the evaporation and condensation characteristics gradually decrease.

Furthermore, in this embodiment, the evaporation tank 60 is provided with a second liquid level sensor 64, and the second liquid level sensor 64 is electrically connected to the heater 61. The second liquid level sensor 64 serves as a main control switch of the heater 61. When the concentrated water injected into the evaporation tank 60 reaches a certain liquid level range, the second liquid level sensor 64 triggers the heater 61 to heat the concentrated water.

Furthermore, in this embodiment, the evaporation tank 60 is also provided with a TDS detector 65 (an instrument for detecting the total amount of dissolved solids in concentrated water) and a sewage outlet 66. A sewage outlet 66 is provided with a sewage control valve 661. The TDS detector 65 is electrically connected to the sewage control valve 661. Specifically, a circuit controller (not shown in the figure) is provided between the TDS detector 65 and the sewage control valve 661. The sewage control valve 661 is a solenoid valve. The circuit controller is used to receive the electrical signal of the TDS detector 65 and convert it into a switch signal for controlling the sewage control valve 661. For example, when the TDS detector 65 obtains that the concentration of concentrated water in the evaporation tank 60 reaches a set value (in this state, the TDS value in the residual concentrated water gradually increases due to the evaporation of a large amount of water, in order to avoid the accumulation of impurities remaining in the evaporation tank 60 after the water is completely evaporated), the sewage control valve 661 is opened in this state to empty the evaporation tank 60.

Furthermore, in this embodiment, the cold and heat exchanger 70 is also provided with a hot water outlet 76, and a second water outlet valve 761 is provided at the hot water outlet 76. Specifically, the temperature sensor 75 in the cold and heat exchanger 70 can be electrically connected to an alarm. When the temperature is too high, the alarm sounds an alarm in the form of sound, light, etc., to remind the user that hot water is available in the cold and heat exchanger 70, and the user can obtain hot purified water by opening the second water outlet valve 761. This method reasonably utilizes the cold and heat exchanger 70 to heat the purified water during the condensation process, and has a certain energy-saving effect.

Furthermore, in the present embodiment, the distilled water storage tank 80 is also provided with a distilled water outlet 82, and a third water outlet valve 821 is provided at the distilled water outlet 82. Specifically, the distilled water storage tank 80 can be electrically connected to an alarm by providing a liquid level sensor, and when a certain amount of distilled water is collected in the distilled water storage tank 80, the liquid level sensor triggers the alarm to sound or light an alarm, prompting the user to open the third water outlet valve 821 to use the distilled water.

The present invention also discloses a control method for controlling the above-mentioned environmentally friendly water purification system, which specifically comprises the following steps:

s1. Obtain the cooling water level in the heat exchanger 70 compared with the first standard level. When the cooling water level is greater than or equal to the first standard level, the first booster pump 20 remains closed; when the cooling water level is less than the first standard level, the first booster pump 20 is started to add cooling water to the heat exchanger 70;

s2. Obtaining the concentrated water level in the evaporation tank 60 compared with the second standard level, when the concentrated water level is greater than or equal to the second standard level, the second booster pump 50 remains closed and the heater 61 is turned on; when the concentrated water level is less than the second standard level, the second booster pump 50 is started;

s3. The cooling water temperature in the heat exchanger 70 is obtained and compared with the standard temperature. When the cooling water temperature is greater than or equal to the standard temperature, the heater 61 is turned off, the second water outlet valve 761 is opened to discharge the cooling water in the heat exchanger 70, and the step s1 is repeated to replenish the cooling water in the heat exchanger 70; when the cooling water temperature is lower than the standard temperature, the step s2 is repeated to heat the concentrated water;

s4. Obtain the TDS value of the concentrated water in the evaporation tank 60 and compare it with the standard TDS value. When the TDS value of the concentrated water is greater than or equal to the standard TDS value, open the sewage control valve 661 to discharge the residual concentrated water to prevent the evaporation tank 60 from being evaporated and producing impurities that are difficult to remove; when the TDS value of the concentrated water is lower than the standard TDS value, repeat steps s1-s3 in sequence.

Specifically, the first standard liquid level and the second standard liquid level in the above method are respectively predetermined liquid levels customized within the container height range of the heat exchanger 70 and the evaporator 60, wherein the first liquid level sensor 74 and the second liquid level sensor 64 can be respectively set at the height of the first standard liquid level and the second standard liquid level, so that when the cooling water and the concentrated water reach the above standard liquid levels, they are sensed by the corresponding liquid level sensors to achieve the corresponding functions; the standard TDS value in this embodiment is obtained by the following method: obtaining multiple groups of concentrated water with equal volumes, heating each group of concentrated water to boiling, measuring its TDS value, and obtaining the median of the TDS values as the standard TDS value.

The detailed control process of each step can be found in the specific content of the above embodiment, which will not be repeated here.

Through the above implementation, an environmentally friendly water purification system in the embodiment can achieve at least the following technical effects:

The concentrated water produced by the filter 10 is distilled by the evaporator 60, and the water vapor is condensed by the heat exchanger 70 to obtain distilled water and collect it, which not only avoids the environmental pollution problem caused by the direct discharge of a large amount of concentrated water and waste water after filtering, but also indirectly broadens the application scope of concentrated water and waste water, thereby achieving the purpose of water saving; the heat exchanger 70 in the system introduces filtered clean water to participate in cooling, without the need for additional cooling medium or high-power evaporator, which can effectively save energy consumption, and at the same time utilizes the cooling process to heat the filtered clean water to meet the user's hot water needs; the system realizes the separate discharge of room temperature purified water, hot purified water and distilled water, which can basically meet the domestic water needs.

Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. An environmental protection water purification system, characterized by comprising:

The filter is used for filtering tap water and is provided with a filtering outlet and a drainage outlet;

The water inlet of the first booster pump is connected with the filtering outlet;

The water purification storage tank is provided with a water purification inlet and a normal-temperature water outlet, a first water outlet valve is arranged at the normal-temperature water outlet, and the water purification inlet is connected with the water outlet of the first booster pump;

the concentrated water storage tank is provided with a concentrated water inlet and a concentrated water outlet, and the concentrated water inlet is connected with the drainage outlet;

the water inlet of the second booster pump is connected with the concentrated water outlet;

The evaporation tank is provided with a heater, an evaporation tank inlet and a steam outlet, the heater is used for heating the evaporation tank, and the evaporation tank inlet is connected with the water outlet of the second booster pump;

The cold-heat exchanger is used for forming distilled water and is provided with a steam inlet and a condensation outlet, and the steam inlet is connected with the steam outlet; and

The distilled water storage tank is provided with a distilled water inlet, and the distilled water inlet is connected with the condensation outlet.

2. The system according to claim 1, wherein the cold-heat exchanger is further provided with a water supply port, the water purification storage tank is further provided with a water purification overflow port, and the water supply port is connected with the water purification overflow port.

3. The system of claim 2, wherein the cold-heat exchanger is further provided with a first level sensor, and the first level sensor is electrically connected to the first booster pump.

4. An environmental protection water purification system according to claim 3, wherein the cold-heat exchanger is further provided with a temperature sensor, and the temperature sensor is electrically connected to the heater.

5. The system of claim 1, wherein the evaporation tank is further provided with a second level sensor, and the second level sensor is electrically connected to the heater.

6. The system of claim 5, wherein the evaporation tank is further provided with a TDS detector and a drain, the drain is provided with a drain control valve, and the TDS detector is electrically connected with the drain control valve.

7. The system of claim 4, wherein the cold heat exchanger is further provided with a hot water outlet, and a second outlet valve is provided at the hot water outlet.

8. The system of claim 1, wherein the distilled water storage tank is further provided with a distilled water outlet, and a third water outlet valve is provided at the distilled water outlet.

9. A control method of an environment-friendly water purification system based on the environment-friendly water purification system as claimed in claims 1-8, characterized by comprising the steps of:

s1. obtaining the cooling water level in the cold-heat exchanger, when the cooling water level is greater than or equal to the first standard level, the first booster pump is kept closed, and when the cooling water level is less than the first standard level, the first booster pump is started to supplement cooling water into the cold-heat exchanger;

s2, acquiring a concentrated water liquid level in the evaporation tank, wherein when the concentrated water liquid level is larger than or equal to a second standard liquid level, the second booster pump is kept off, the heater is started, and when the concentrated water liquid level is smaller than the second standard liquid level, the second booster pump is started;

s3. obtaining the cooling water temperature in the cold-heat exchanger, when the cooling water temperature is greater than or equal to the standard temperature, closing the heater, opening the second water outlet valve to discharge the cooling water in the cold-heat exchanger, and repeating the step s1; repeating the step s2 when the cooling water temperature is lower than the standard temperature;

s4. obtaining a concentrated water TDS value in the evaporation tank, and when the concentrated water TDS value is larger than or equal to the standard TDS value, opening the pollution discharge control valve; and when the TDS value of the concentrated water is lower than the standard TDS value, sequentially repeating the steps s1-s3.