CN117582824A - Water purification equipment heat sterilization method and water purification equipment heat sterilization system - Google Patents
Water purification equipment heat sterilization method and water purification equipment heat sterilization system Download PDFInfo
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- CN117582824A CN117582824A CN202311623981.0A CN202311623981A CN117582824A CN 117582824 A CN117582824 A CN 117582824A CN 202311623981 A CN202311623981 A CN 202311623981A CN 117582824 A CN117582824 A CN 117582824A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 353
- 230000001954 sterilising effect Effects 0.000 title claims abstract description 77
- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 77
- 238000000746 purification Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000008234 soft water Substances 0.000 claims abstract description 23
- 238000010992 reflux Methods 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 238000007599 discharging Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims 1
- 239000012535 impurity Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 6
- 230000003749 cleanliness Effects 0.000 description 6
- 239000008399 tap water Substances 0.000 description 6
- 235000020679 tap water Nutrition 0.000 description 6
- 239000012528 membrane Substances 0.000 description 4
- 239000008236 heating water Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
- B01D65/022—Membrane sterilisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/58—Multistep processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/32—By heating or pyrolysis
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses a water purification equipment heat disinfection method and a water purification equipment heat disinfection system, wherein the water purification equipment heat disinfection comprises the following steps: s1, continuously introducing soft water into a raw water tank, filtering raw water in the raw water tank sequentially through a first filter and a second filter to obtain secondary pure water, and refluxing the secondary pure water to the raw water tank; s2, monitoring the raw water conductivity value in real time; s3, stopping introducing soft water into the raw water tank if the raw water conductivity value is lower than a first conductivity preset value Q1; s4, heating raw water; s5, introducing the heated raw water into the first filter and carrying out heat sterilization on the first filter. The second-stage pure water obtained after being filtered by the first filter and the second filter is continuously led into the raw water tank, so that the impurity content in the raw water tank can be effectively reduced. When the conductivity of the raw water is lower than the first conductivity preset value Q1, the heated raw water is finally utilized to be led into the first filter and the first filter is subjected to heat sterilization, so that the heat sterilization effect is better.
Description
Technical Field
The invention relates to the field of water purifying equipment, in particular to a heat sterilization method and a heat sterilization system for water purifying equipment.
Background
Pure water, also called high purity water, refers to water with extremely high chemical purity, and is mainly applied to the fields of biology, chemistry and chemical industry, metallurgy, aerospace, electric power and the like.
Tap water or soft water (tap water after simple purification) is usually filtered through a reverse osmosis membrane to obtain pure water. However, impurities are accumulated in the water purifying equipment during the long-term use process of the water purifying equipment, and the water heater needs to be subjected to heat sterilization regularly. See patent application number cn201420496681. X for heat sterilization by circulating hot water in a water heater. However, the above-mentioned hot water used for sterilizing the water purifying apparatus is tap water or soft water (tap water having undergone simple purification), so that the hot water itself contains a certain amount of impurities, resulting in an unsatisfactory effect of heat sterilization.
Therefore, how to improve the clean degree of hot water in the heat sterilization process is a technical problem to be solved.
Disclosure of Invention
The invention aims to overcome the technical defects, and provides a heat sterilization method and a heat sterilization system for water purifying equipment, which solve the technical problem of how to improve the clean degree of hot water in the heat sterilization process in the prior art.
In order to achieve the technical purpose, the technical scheme of the invention comprises a heat sterilization method of water purifying equipment, which comprises the following steps:
s1, continuously introducing soft water into a raw water tank, filtering raw water in the raw water tank sequentially through a first filter and a second filter to obtain secondary pure water, and refluxing the secondary pure water to the raw water tank;
s2, monitoring the raw water conductivity value in real time;
s3, stopping introducing soft water into the raw water tank if the raw water conductivity value is lower than a first conductivity preset value Q1;
s4, heating raw water;
s5, introducing the heated raw water into the first filter and carrying out heat sterilization on the first filter.
Preferably, the step S4 includes:
s41, continuously refluxing the secondary pure water to the raw water tank, and continuously monitoring the raw water conductivity in real time;
and S42, heating the raw water if the conductivity of the raw water is lower than the second preset conductivity value Q2.
Preferably, the step S5 includes:
s51, refluxing the first-stage concentrated water to a raw water tank, and monitoring the raw water temperature in real time;
s52, when the raw water temperature reaches a first preset temperature T1, closing a pure water outlet of the first filter;
s53, raising the raw water temperature to a second preset temperature T2, and maintaining the raw water temperature at the second preset temperature T2 for a first preset time T1.
Preferably, the step S5 further includes:
s54, discharging the first-stage concentrated water outwards, and continuously maintaining the second preset time t2.
Preferably, the water purification apparatus heat sterilization method further includes a step S6, and the step S6 includes:
s61, reducing the raw water temperature until the raw water temperature reaches a first preset temperature T1;
s62, opening a pure water outlet of the first filter.
Preferably, in the step S6, the decrease rate of the raw water temperature cannot exceed 5 degrees per minute.
Preferably, the step S61 includes:
s611, stopping heating the raw water;
s612, introducing soft water into the raw water tank to reduce the raw water temperature;
s613, monitoring the raw water temperature in real time until the raw water temperature is reduced to a first preset temperature T1.
Preferably, the water purification apparatus heat sterilization method further includes a step S7, and the step S7 includes:
s71, stopping supplying the primary pure water to the second filter, and refluxing the secondary pure water to the water inlet end of the second filter;
s72, monitoring the conductivity value of the secondary pure water in real time until the conductivity value of the secondary pure water is lower than a third preset conductivity value;
s73, closing a pure water outlet of the second filter, and refluxing the second-stage concentrated water to a water inlet end of the second filter;
and S74, heating the second-stage concentrated water, and carrying out heat sterilization on the second filter.
Preferably, the water purification apparatus heat sterilization method further includes step S8, and the step S8 includes:
s81, heating the secondary pure water;
s82, utilizing the high-temperature secondary pure water to heat-disinfect the external medical equipment.
A heat sterilization system of water purification equipment is provided, which is applied with the heat sterilization method of the water purification equipment.
Compared with the prior art, the invention has the beneficial effects that: the second-stage pure water obtained after being filtered by the first filter and the second filter is continuously led into the raw water tank, so that the impurity content in the raw water tank can be effectively reduced. When the raw water conductivity value is lower than the first conductivity preset value Q1, the raw water cleanliness in the raw water tank reaches the expected standard, and finally the heated raw water is led into the first filter and the first filter is subjected to heat sterilization. The heat sterilization method of the water purification equipment improves the clean degree of raw water in the raw water tank before the heat sterilization of the first filter, and has better heat sterilization effect compared with the heat sterilization method of the water purification equipment directly adopting soft water.
Drawings
FIG. 1 is a schematic flow chart of a heat disinfection method of a water purifying device according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a heat sterilization system of a water purification apparatus according to an embodiment of the present invention;
the raw water tank 100, the water purification module 200, the first filter 210, the second filter 220, the first water pump 230, the second water pump 240, the first heat sterilization unit 300, the conductivity sensor 310, the first heater 320, the first water return line 330, the first water return valve 340, the second water return line 350, the second water return valve 360, the drain line 370, the drain valve 380, the second heat sterilization unit 400, the second heater 410, the third water return line 420, the third heat sterilization unit 500, the external circulation line 510, and the circulation valve 520.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 2, the embodiment of the invention provides a heat sterilization method for water purification equipment, which belongs to the field of water purification equipment and is used for heat sterilization of water purification equipment.
To avoid obscuring the technical solution of the present application, some terms that frequently appear in the present application will be described. Wherein, soft water (tap water subjected to simple treatment), raw water (water stored in a raw water tank), primary pure water (pure water obtained by filtration through a first filter), secondary pure water (pure water obtained by filtration through a second filter), primary concentrated water (concentrated water produced by the first filter), secondary concentrated water (concentrated water produced by the second filter).
In some preferred embodiments, the water purification apparatus heat sterilization method includes:
s1, continuously introducing soft water into a raw water tank, filtering raw water in the raw water tank sequentially through a first filter and a second filter to obtain secondary pure water, and refluxing the secondary pure water to the raw water tank;
s2, monitoring the raw water conductivity value in real time;
s3, stopping introducing soft water into the raw water tank if the raw water conductivity value is lower than a first conductivity preset value Q1;
s4, heating raw water;
s5, introducing the heated raw water into the first filter and carrying out heat sterilization on the first filter.
In the above embodiment, the second pure water obtained after filtration through the first filter and the second filter is continuously introduced into the raw water tank, so that the impurity content in the raw water tank can be effectively reduced. When the raw water conductivity value is lower than the first conductivity preset value Q1, the raw water cleanliness in the raw water tank reaches the expected standard, and finally the heated raw water is led into the first filter and the first filter is subjected to heat sterilization. The heat sterilization method of the water purification equipment improves the clean degree of raw water in the raw water tank before the heat sterilization of the first filter, and has better heat sterilization effect compared with the heat sterilization method of the water purification equipment directly adopting soft water.
It is understood that the smaller the impurity content in the raw water is, the better the heat sterilization effect on the first filter is. However, the continuous introduction of soft water into the raw water tank is limited by the fact that the soft water contains a large amount of impurities. The impurity content of raw water cannot be continuously reduced by mixing soft water with secondary pure water, and the minimum value of the impurity content of raw water is limited by the flow ratio of soft water to secondary pure water.
In order to further increase the degree of cleanliness of the raw water in the raw water tank, step S4 includes:
s41, continuously refluxing the secondary pure water to the raw water tank, and continuously monitoring the raw water conductivity in real time;
and S42, heating the raw water if the conductivity of the raw water is lower than the second preset conductivity value Q2.
In the above embodiment, the raw water conductance in the raw water tank is reduced to the first conductance preset value Q1 by the continuous reflux of the secondary pure water. Then, the introduction of soft water into the raw water tank is stopped, and the degree of cleanliness of the raw water can be further improved by refluxing the secondary pure water. Until the raw water conductivity value is lower than the second conductivity preset value Q2. The clean degree of the raw water is indicated to reach the requirement. And the first filter can be disinfected by the raw water with high cleanliness.
It should be noted that the first preset conductivity value Q1 is related to the water quality of the local tap water, and the second preset conductivity value Q2 is related to the clean degree requirement of the final raw water. Specifically, Q1 is preferably 80us, and Q2 is preferably 5us.
In some preferred embodiments, step S5 comprises:
s51, refluxing the first-stage concentrated water to a raw water tank, and monitoring the raw water temperature in real time;
s52, when the raw water temperature reaches a first preset temperature T1, closing a pure water outlet of the first filter;
s53, raising the raw water temperature to a second preset temperature T2, and maintaining the raw water temperature at the second preset temperature T2 for a first preset time T1.
In the above embodiment, the first preset temperature T1 is the protection temperature of the permeable membrane, and when the raw water temperature reaches the first preset temperature T1, the pure water outlet of the first filter is closed, so that the permeable membrane can be prevented from being damaged due to the osmotic pressure difference under high temperature. And then continuously increasing the raw water temperature to enable the raw water temperature to reach a second preset temperature T2. The effect of sterilizing the first filter can be achieved by maintaining the high temperature of the raw water for a long time.
Further, the first preset temperature T1 is preferably 50 degrees celsius, the second preset temperature T2 is preferably 90 degrees celsius, and the first preset time T1 is preferably 30 minutes.
On the basis of the above embodiments, in some preferred embodiments, step S5 further includes:
s54, discharging the first-stage concentrated water outwards, and continuously maintaining the second preset time t2.
After the first filter is thermally sterilized, the first-stage concentrated water may be discharged to the outside, and thus toxoid in the first filter and in the pipe may be discharged. Wherein the second preset time t2 is preferably 15 minutes.
In some preferred embodiments, the water purification apparatus heat sterilization method further includes step S6, the step S6 including:
s61, reducing the raw water temperature until the raw water temperature reaches a first preset temperature T1;
s62, opening a pure water outlet of the first filter.
After the completion of the heat sterilization, the temperature of the raw water needs to be lowered so that the raw water temperature is lower than the first preset temperature T1 in order to facilitate the normal use of the subsequent first filter.
It should be emphasized that the temperature of the raw water cannot be lowered too rapidly, otherwise the permeable membrane is liable to be broken due to a severe temperature change. In some preferred embodiments, the rate of decrease of the raw water temperature in step S6 cannot exceed 5 degrees per minute.
As long as the method of reducing the raw water temperature is possible, in some preferred embodiments, the step S61 includes:
s611, stopping heating the raw water;
s612, introducing soft water into the raw water tank to reduce the raw water temperature;
s613, monitoring the raw water temperature in real time until the raw water temperature is reduced to a first preset temperature T1.
In the above embodiment, the soft water having a low temperature is introduced into the raw water tank, thereby reducing the raw water temperature. However, in order to avoid too fast a temperature drop of the raw water, the amount of soft water introduced into the raw water tank per minute should not exceed one twentieth of the volume of the raw water tank.
In some preferred embodiments, the water purification apparatus heat sterilization method further includes step S7, the step S7 including:
s71, stopping supplying the primary pure water to the second filter, and refluxing the secondary pure water to the water inlet end of the second filter;
s72, monitoring the conductivity value of the secondary pure water in real time until the conductivity value of the secondary pure water is lower than a third preset conductivity value;
s73, closing a pure water outlet of the second filter, and refluxing the second-stage concentrated water to a water inlet end of the second filter;
and S74, heating the second-stage concentrated water, and carrying out heat sterilization on the second filter.
In the above embodiment, since the pure water outlet of the second filter is closed, the water introduced into the second filter is entirely discharged as the second-stage concentrated water. And the secondary concentrated water is returned to the water inlet end of the second filter, so that the water can be recycled. The second filter can be heat sterilized by heating water.
In some preferred embodiments, the water purification apparatus heat sterilization method further includes step S8, and step S8 includes:
s81, heating the secondary pure water;
s82, utilizing the high-temperature secondary pure water to heat-disinfect the external medical equipment.
The external medical device may be sterilized using step S8.
It should be emphasized that steps S1 to S6 are used for sterilizing the first filter, step S7 is used for sterilizing the second filter, step S8 is used for sterilizing the external medical device, and all three sterilization processes can be independently performed and do not need to be performed synchronously.
In addition, the invention also provides a heat sterilization system of the water purification equipment, which is applied to the heat sterilization method of the water purification equipment.
The water purification equipment heat disinfection system comprises: the raw water tank 100, the water purification module 200, the first heat sterilization assembly 300 and the second heat sterilization assembly 400, wherein the water purification module 200 comprises a first filter 210, a second filter 220, a first water pump 230 and a second water pump 240, the first filter 210 comprises a first water inlet, a first pure water outlet and a first concentrated water outlet, the second filter 220 comprises a second water inlet, a second pure water outlet and a second concentrated water outlet, the first water inlet is communicated with the raw water tank 100, the first pure water outlet is communicated with the second water inlet, the first water pump 230 is used for guiding raw water into the first water inlet, and the second water pump 240 is used for guiding primary pure water into the second water inlet.
The first heat sterilization assembly 300 includes a conductivity sensor 310, a first heater 320, a first water return pipe 330, a first water return valve 340, a second water return pipe 350, a second water return valve 360, a discharge pipe 370 and a drain valve 380, wherein the conductivity sensor 310 is used for detecting the conductivity of the raw water in the raw water tank 100, the first heater 320 is installed between the raw water tank 100 and the first water inlet, and is used for detecting the conductivity of the raw water in the raw water tank 100, one end of the first water return pipe 330 is communicated with the raw water tank 100, the other end thereof is communicated with the second pure water outlet, and the first water return valve 340 is installed in the first water return pipe 330 to control the on-off of the first water return pipe 330. The second water return pipe 350 is used for returning the first concentrated water to the raw water tank 100, and the second water return valve 360 is used for controlling the on-off of the second raw water pipe.
When the degree of cleanliness of the raw water in the raw water tank 100 satisfies the requirement, the raw water may be heated by the first heater 320, and then the first pure water outlet may be closed. All of the water of the first filter 210 is led out from the first water concentrate, and all of the primary concentrated water at this time is led back to the raw water tank 100 through the second water return line 350. After the heat sterilization of the first filter 210 is completed, the raw water after the heat sterilization may be discharged outside via the discharge line 370.
The second heat sterilization assembly 400 includes a second heater 410 and a third water return line 420, wherein the second heater 410 is used for heating the secondary pure water, and the third water return line 420 is used for returning the secondary concentrated water to the second water inlet. The heated secondary pure water may circulate among the third water return line 420, the second filter 220, and the second water pump 240. The second heater 410 is heat sterilized after a certain time.
The third heat sterilization assembly 500 includes an external circulation line 510 and a circulation valve 520, one end of the external circulation line 510 is connected to the second pure water outlet, one end of the external circulation line 510 is connected to the water outlet of the second water pump 240, and the other end is connected to the water supply line of the external medical device. And simultaneously, the water return pipeline of the external medical equipment is communicated with the water inlet end of the second water pump 240. Thereby forming a complete water circulation pipeline, and heating water for heat sterilization. In addition, the circulation valve 520 is used for controlling the on-off of the external circulation pipeline 510, and a controllable stop valve is required to be additionally arranged between the water return pipeline of the corresponding external medical device and the water inlet end of the second water pump 240.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any other corresponding changes and modifications made in accordance with the technical idea of the present invention shall be included in the scope of the claims of the present invention.
Claims (10)
1. A method for heat sterilization of a water purification apparatus, comprising:
s1, continuously introducing soft water into a raw water tank, filtering raw water in the raw water tank sequentially through a first filter and a second filter to obtain secondary pure water, and refluxing the secondary pure water to the raw water tank;
s2, monitoring the raw water conductivity value in real time;
s3, stopping introducing soft water into the raw water tank if the raw water conductivity value is lower than a first conductivity preset value Q1;
s4, heating raw water;
s5, introducing the heated raw water into the first filter and carrying out heat sterilization on the first filter.
2. The method of heat sterilization of a water purification apparatus according to claim 1, wherein the step S4 comprises:
s41, continuously refluxing the secondary pure water to the raw water tank, and continuously monitoring the raw water conductivity in real time;
and S42, heating the raw water if the conductivity of the raw water is lower than the second preset conductivity value Q2.
3. The method of heat sterilization of a water purification apparatus according to claim 1, wherein the step S5 comprises:
s51, refluxing the first-stage concentrated water to a raw water tank, and monitoring the raw water temperature in real time;
s52, when the raw water temperature reaches a first preset temperature T1, closing a pure water outlet of the first filter;
s53, raising the raw water temperature to a second preset temperature T2, and maintaining the raw water temperature at the second preset temperature T2 for a first preset time T1.
4. The method of heat sterilization of a water purification apparatus according to claim 3, wherein the step S5 further comprises:
s54, discharging the first-stage concentrated water outwards, and continuously maintaining the second preset time t2.
5. The water purification apparatus heat sterilization method according to claim 3, further comprising step S6, the step S6 comprising:
s61, reducing the raw water temperature until the raw water temperature reaches a first preset temperature T1;
s62, opening a pure water outlet of the first filter.
6. The method for heat sterilization of a water purification apparatus according to claim 5, wherein the raw water temperature is decreased at a rate of not more than 5 degrees per minute in the step S6.
7. The method of heat sterilization of a water purification apparatus according to claim 5, wherein the step S61 includes:
s611, stopping heating the raw water;
s612, introducing soft water into the raw water tank to reduce the raw water temperature;
s613, monitoring the raw water temperature in real time until the raw water temperature is reduced to a first preset temperature T1.
8. The water purification apparatus heat sterilization method according to claim 1, further comprising step S7, the step S7 comprising:
s71, stopping supplying the primary pure water to the second filter, and refluxing the secondary pure water to the water inlet end of the second filter;
s72, monitoring the conductivity value of the secondary pure water in real time until the conductivity value of the secondary pure water is lower than a third preset conductivity value;
s73, closing a pure water outlet of the second filter, and refluxing the second-stage concentrated water to a water inlet end of the second filter;
and S74, heating the second-stage concentrated water, and carrying out heat sterilization on the second filter.
9. The water purification apparatus heat sterilization method according to claim 5, further comprising step S8, the step S8 comprising:
s81, heating the secondary pure water;
s82, utilizing the high-temperature secondary pure water to heat-disinfect the external medical equipment.
10. A water purification apparatus heat sterilization system, characterized in that it is applied with the water purification apparatus heat sterilization method as claimed in any one of claims 1 to 9.
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| CN202311623981.0A CN117582824A (en) | 2023-11-28 | 2023-11-28 | Water purification equipment heat sterilization method and water purification equipment heat sterilization system |
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| CN202311623981.0A CN117582824A (en) | 2023-11-28 | 2023-11-28 | Water purification equipment heat sterilization method and water purification equipment heat sterilization system |
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