JPS6115786A - Purification and sterilization of water - Google Patents

Abstract

PURPOSE:To perfectly perform boiling sterilization, by a method wherein a constant quantity of water to be treated fed in a heater to perfectly perform boiling sterilization treatment and a definite quantity of sterilized water is left without completely discharging said sterilized water while new water to be treated is replenished to the remaining sterilized water to perform boiling treatment. CONSTITUTION:Prior to sterilizing water to be treated, whice was subjected to purification treatment through a filter bed 6a, by the irradiation of ultraviolet rays, a definite quantity of water to be treated is sent into a heater 5 through one of the pipes of a heat exchanger 4 to be heated to definite temp. while the heated water to be treated is subjected to boiling treatment. Next, a definite quantity of water to be treated sent into the heater 5 is left while the remainder thereof is discharged and water to be treated is newly replenished to the heater 5 to be subjected to heating and boiling treatment in the same way as mentioned above while water to be treated discharged from the heater 5 is passed through the other pipe of the heat exchanger 5 to perform the heat exchange with the water to be treated passing through the above mentioned one pipe of said heat exchanger 4 and cooled to proper temp. to be supplied to the filter bed 6a. By this method, the perfect boiling sterilization of water to be treated can be performed.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention purifies the water to be treated by passing it through a filtration layer, and then boils and sterilizes the water before sterilizing it by irradiating it with ultraviolet rays. This invention relates to a water purification and sterilization method.

(Prior Art) A known water purification and sterilization device includes a filtration layer made of activated carbon or the like, and a water storage sterilization chamber provided with an ultraviolet sterilization lamp therebelow.

In this system, the water to be treated is purified while passing through the filtration layer, and then sterilized by irradiation with ultraviolet light in the water storage sterilization chamber. There is a risk that bacteria living in the water to be treated will multiply within the filter layer such as activated carbon.

One possible method for suppressing bacterial growth in the filtration layer is to sterilize the water to be treated by boiling before sending it to the filtration layer, and the inventor of the present application first passed the water to be treated through an activated carbon-filled bed to purify it. A boiling sterilizer consisting of a heat exchanger and a heater is installed in front of the equipment that sterilizes the water by irradiating it with ultraviolet rays, and the water to be treated is sent into the heater through one pipe of the heat exchanger. The treated water, which has been boiled and sterilized in this heater, passes through the other tube of the heat exchanger, thereby exchanging heat between the treated water passing through one of the tubes and cooling it to an appropriate temperature. He proposed a method for purifying and sterilizing water, which is then supplied to the activated carbon packed bed (Japanese Patent Application No. 102504/1982).

(Problems to be Solved by the Invention) However, in the above method, the water to be treated is continuously passed through the heater and the heat exchanger and sent to the activated carbon packed bed. There is a possibility that sterilization is not performed and the water to be treated containing living bacteria is sent into the activated carbon packed bed.

In view of the above-mentioned circumstances, it is an object of the present invention to propose a method for purifying and sterilizing water in which water to be treated is completely sterilized by boiling before being introduced into a filter layer such as activated carbon.

(Means for Solving the Problems) In order to solve the above problems, in the present invention, the water to be treated is passed through a filter layer to be purified, and the water to be treated is further irradiated with ultraviolet rays to sterilize the water. After a certain amount of treated water is sent into the heater through one pipe of the heat exchanger, it is heated to a certain temperature in the heater, further boiled, and then the water is sent into the heater. A certain amount of the water to be treated is left and the rest is discharged, and the heater is replenished with new water to be treated and heated and boiled in the same manner as described above, while the water to be treated that is discharged from the heater is The water to be treated is passed through the other tube of the heat exchanger, and heat is exchanged between the treated water passing through the one tube, cooled to an appropriate temperature, and then supplied to the filtration layer.

(Function) That is, as described above, a certain amount of water to be treated is fed into the heater, heated there to a certain temperature, boiled, and then supplied to the filtration layer through the heat exchanger. The boiling sterilization process is completely carried out.

Furthermore, all of the boiled water to be treated is not discharged from the heater, but a certain amount is left behind, and this is replenished with new water to be treated. It is never supplied to the filtration layer without being filtered.

In addition, after the boiling treatment as described above, the amount of water to be treated left in the heater is approximately 20 to 30%.
If it is less than 0X, there is a risk that a part of the water to be treated will be supplied to the filtration layer without being boiled, and if it is more than 30%, the treatment efficiency will decrease.

(Embodiment) The drawing is a four-sheet showing an embodiment of the present invention.
2 is a filtration filter, 2 is an activated carbon filter, 3 is a water softener, V is a heat exchanger, 5 is a heater, and 6 is a purification and sterilization device. The heater j has a heater jα, a thermostat jb1, a float switch Sc, and a safety valve above it, td
is installed, and the purification and sterilization device t is equipped with an activated carbon layer or r
A filtration layer 6α composed of a cloth layer, etc., a water storage sterilization chamber ≦b below the filtration layer 6α, an ultraviolet sterilization lamp 6c inside the water storage sterilization chamber ≦b, and a cooling vibro d inside the outer periphery of the device B.
A heat insulating layer 6e provided with -≦- is wrapped.

In addition, a manual cock j1 is installed in front of the filtration filter l, and a solenoid valve 10 is installed between the water softener 3 and the heat exchanger q. Open it, pressurize it with the water pump 9, and remove it from the filter.
, the activated carbon filter 2, the water softener 3, and the heat exchanger G, and are fed into the heater S. When the water to be treated in the heater j reaches a certain amount, the float switch jc is activated to close the solenoid valve 10.

Heater like this! Heater jα with water filled inside
The humidity in the container is heated, for example, from 20° C. to 94° C., and then boiling is performed at, for example, 94° C.±3° C. After the boiling process is complete, open the solenoid valve 10, operate the water pump 9, and turn on the heater! At the same time, a certain amount of the water to be treated inside is left and the rest is sent to the filter layer 6α of the purification and sterilization device 6, and at the same time, the heater j is replenished with new water to be treated corresponding to the amount of water sent.

Heater by the same operation as above! After heating and boiling the water inside the filter layer 6α, the water is fed into the filter layer 6α.

The water to be treated that has been sent to the r layer 6α sequentially passes through the entire layer and is stored in the water storage sterilization chamber≦b. In the water storage sterilization chamber 6b, the water to be treated is sterilized by ultraviolet rays irradiated from the sterilization lamp 6o, and at the same time, cooling water is passed from the compressor into the cooling pipe td, so that the water in the water storage sterilization chamber 6b is sterilized. The treated water is cooled, so by opening the valve // provided at the bottom of the device B, purified and sterilized cooling water is supplied.

In addition, in the above embodiment, the water pump 9 is equipped with a filtration filter/
We have described an example in which the water to be treated that has been boiled in the heater S is sent to the purification and sterilization equipment B under the pressure of this water pump. Another water pump 9' may be provided, and the water to be treated in the heater j may be fed into the purification and sterilization device 6 by the pumping force of this water pump 9'.

Next, an example of operation under the following conditions will be shown.

Heater! Valid content i: 4. OL heater! a: 1100 Kca when 1.6 KW
l /H (825.6 Kaat/ at 1.2KW
H) Solenoid valve to: maw 3 t/min Boiling temperature: 94°C ± 3°C Amount of water discharged from the purification and sterilization device 6: 200CC/min = IO = In addition, the time in parentheses for the processing time and elapsed time in the table above is the value when the heater is used at 1.2 KW and 825.6 Kcal/H.

The water to be treated that has been boiled in the heater j as described above is sequentially sent to the purification and sterilization device B, passes through the filter layer 6α in the device 6, and is collected in the water storage and sterilization chamber 6b.

In this case, in this embodiment, the material of the permeation layer 6α is selected so that the water to be treated passes through the r-vortex layer 6α in a fine form. Since the water can be cooled and water is supplied to the water storage sterilization chamber tb in a sprinkling state, the efficiency of ultraviolet ray irradiation can be increased.

In the above examples, boiling sterilization was sufficiently performed in the heater j, and no bacterial growth was observed in the purification and sterilization device 6.

Furthermore, no living bacteria were observed in the treated water taken out from the purification and sterilization bag N6.

(Effects of the Invention) In summary, according to the present invention, it is possible to prevent the proliferation of bacteria within the purification and sterilization apparatus using a simple method.

[Brief explanation of the drawing]

The drawings are seven material sheets showing one embodiment of the present invention.

Claims (1)

[Claims] Before the water to be treated is passed through a filtration layer to be purified and further sterilized by irradiation with ultraviolet rays, a certain amount of the water to be treated is fed into the heater through one pipe of the heat exchanger, and then the water is The water is heated to a certain temperature in the heater, further boiled, and then the water to be treated is fed into the heater, leaving a certain amount and discharging the rest. The water to be treated is newly replenished and heated and boiled in the same manner as above, while the water discharged from the heater is passed through the other pipe of the heat exchanger, and from this, the water is heated and boiled in the same manner as above. A method for purifying and sterilizing water, characterized by exchanging heat between the water to be treated passing through it, cooling it to an appropriate temperature, and then supplying it to the filtration layer.