TWI468234B - Washing method of water supply piping for water treatment plant - Google Patents

Description

Water treatment device water supply pipe cleaning method

The present invention relates to a method for cleaning a water supply pipe of a water treatment device, and more particularly to a water treatment device for a water treatment device, such as a filter device for filtering an organic substance containing a large amount of organic matter and microorganisms to be easily propagated. The method of cleaning efficiently.

The filter device is a filter bed formed by filling a filter with a filter medium such as sand or anthracite, and removes impurities such as SS to remove it. The operation of the filter device is usually performed alternately: the filtered raw water is passed through to obtain The filtration operation of the treated water and the backwashing treatment in which the backwash water is introduced into the filter to discharge the SS or the like captured by the trampoline (for example, Patent Document 1).

In such a filtration device, when the raw water containing a large amount of organic matter and the microorganisms are easily propagated, the microorganisms contained in the raw water and captured by the filter bed or the microorganisms which are propagated in the filter bed are reversed. The washing treatment is washed and removed.

However, on the water supply pipe from the raw water tank to the raw water between the filters, the microorganisms that have been attached and propagated cannot be washed and removed by the backwashing treatment, and the result of the microbial growth after the passage of time will allow the water supply. The microorganisms that are closed by the piping or attached to the piping will agglomerate and flow into the filter. The sealing of the piping is a major problem. When the microbial block peeled off from the piping flows into the filter, since the specific gravity is close to the filter material, it is difficult to discharge it by the usual backwashing treatment. Moreover, mud particles are formed due to the viscous substance and the filter material generated by the microorganisms accumulated in the filter, and as a result, the filter bed is closed, or the filtration performance is lowered due to the short passage of the filter medium.

In order to solve these problems, a conventional method is to inject a sterilizing agent into raw water to prevent microbial growth. The maintenance work is carried out on a regular basis, and the piping is cleaned and the filter material of the filter is replaced.

[Patent Document 1]

Japanese Patent No. 3460324

In the past, the sterilizing treatment by the drug requires a complicated daily operation such as adjustment and replenishment of the amount of the drug to be injected. Since it is necessary to treat harmful drugs, it is not suitable from the viewpoint of the working environment, and it is necessary to cost the medicine, especially If the amount of water to be treated is increased, the cost of the medicine is also large, and since the medicine may be mixed into the filtered water, it is necessary to provide means for removing the medicine when using the filtered water, or to use a large amount of water after washing the medicine. Washing and washing will have the above problems, and the practicality is not good.

In the pipe cleaning of the regular maintenance work or the filter material replacement of the filter, it is necessary to stop the operation of the filter device, so the operation efficiency is not good. Therefore, there is a problem with the amount of work or the cost of the filter material.

Therefore, it is desirable to have a method of washing the water supply pipe of the filter without sterilizing with a medicine or maintenance work for stopping the operation of the filter device.

The method described in Patent Document 1 is carried out by combining an air backwashing treatment and a backwashing treatment with an alkali and/or an acid, and the backwashing water is used in addition to the alkali and/or acid. The flow direction flows in the filter and is discharged from the filter, so the water supply pipe cannot be washed.

The problem of cleaning the water supply pipe is not limited to a filtration device, such as an ion exchanger, a water softener, or an activated carbon column, and is actually filtered by a water treatment material such as an internal ion exchange resin or activated carbon. All devices that function, periodically or in response to backwashing, have common problems.

An object of the present invention is to solve the above-mentioned problems and to provide a method for cleaning a water supply pipe of a water treatment device, which can sufficiently clean a water supply pipe of a water treatment device such as a filter device, even if it is used to treat microorganisms and easily multiply. In the case where the organic matter contains water, the treatment can be continued for a long period of time and stably.

In the water treatment device of the present invention, the water supply pipe is filled with a water treatment material, and the water treatment device main body is periodically or in need of backwashing treatment, and the raw water is supplied to the main body of the water treatment device. a water supply pipe, a process water pipe for taking out the treated water from the water treatment device main body, a backwash water pipe for supplying the backwash water to the water treatment device main body, and a water supply pipe connected to the water supply pipe for discharging the backwash water The backwashing drain pipe to the outside of the system is characterized in that the air mixed water is supplied to the upstream side of the connection portion of the backwashing drain pipe and the water supply pipe by the air mixing water The air washing step of discharging the backwashing drain pipe through the connection portion, and then supplying the backwash water to the water treatment device main body, and passing the backwashing water from the water treatment device main body through the connecting portion The water supply pipe is washed by the backwashing step of discharging the backwashing drain pipe.

In the present invention, the step of cleaning the air to the air injection amount of the water supply pipe, the water supply for the pipe per unit cross-sectional area of 1cm ² 4 ~ 10L / min, cleaning time of the air cleaning step, can be the following The reference time T (minutes) calculated by the above formula (I) is three times or more (second invention).

T={S×L×0.001/W} (I) (S is the sectional area (cm ² ) of the water supply pipe, L is the length (cm) of the water supply pipe through which the air mixed water flows, and W is the washing time. Water flow (L/min)).

After the backwashing step, a final washing step of supplying raw water to the water treatment device main body through the water supply pipe and discharging the effluent water from the main body of the water treatment device to the outside of the system may be performed (third invention) .

Further, a treatment water pipe air cleaning step of supplying the air-mixed water to the treated water pipe and discharging it to the outside of the system may be performed (fourth invention).

In the case where the treatment water tank for storing the treated water from the treated water pipe and the treated water in the treated water tank are supplied as backwash water to the backwashing water pipe of the water treatment device main body, before the backwashing step Further, a step of supplying the air-mixed water to the backwashing water pipe and discharging it to the backwashing water pipe air cleaning step outside the system (the fifth invention) may be performed, in which case, if the device is constructed in the water treatment device When the backwashing water pipe is connected to the treated water pipe in the vicinity of the treated water discharge port of the main body, the air mixed water may be supplied from the backwashing water pipe to the connection portion between the backwashing water pipe and the treated water pipe. The treatment water flow direction flows to the treatment water pipe, and is then discharged to the backwash water pipe outside the system and the treated water pipe air washing step (sixth invention).

In the present invention, the following structure is exemplified as the main body of the water treatment device (the seventh to tenth inventions).

(1) A filter which is filled with a filter material as a water treatment material.

(2) An ion exchange column in which an ion exchange resin is filled as a water treatment material.

(3) A water softener filled with an ion exchange resin as a water treatment material.

(4) An activated carbon column in which activated carbon is internally filled as a water treatment material.

The washing method of the water supply pipe of the water treatment device of the present invention can be applied, for example, to the washing of the water supply pipe of the water treatment device in which the organic matter contains water as raw water (11th invention).

In the cleaning method of the water supply pipe of the water treatment device according to the present invention, in the air cleaning step, the water is mixed with water, and the connection portion of the backwashing drainage pipe of the water supply pipe is washed further upstream, and is adhered to the pipe. When a pollutant such as a wall or the like is efficiently washed and peeled off, it can be discharged from the backwashing drain pipe to the outside of the system. In the air washing step, the air-mixed water flows only to the connection portion of the backwashing drain pipe of the water supply pipe, and the water supply pipe from the connection portion to the water treatment device main body is not washed. The length of the pipe from the connection portion to the main body of the water treatment device is short, and the necessity of cleaning the portion is low, and impurities such as microorganisms which are peeled off during air washing flow into the portion, and are more likely to flow into the water treatment. The main body of the device.

In the present invention, after the air washing step, the backwashing water is supplied to the water treatment device main body, and the backwashing water from the water treatment device main body is passed through the connecting portion from the backwashing In the backwashing step of draining the drain pipe, the water supply pipe or the water treatment device main body between the filter main body and the connecting portion can be cleaned, and even if the air is washed, the contaminated substances such as microorganisms which are peeled off flow into the body. This part can also be effectively discharged to the outside of the system through the backwashing drainage pipe.

In the present invention, the air injection amount of the water supply pipe, the water supply pipe per unit time of the air cleaning step of cleaning the cross-sectional area of 1cm ² 4 ~ 10L / min, the air cleaning step can be based on the following formula (I) Three times or more of the calculated reference time T (minutes), whereby more efficient washing can be performed, and a better washing effect can be obtained (second invention).

T={S×L×0.001/W} (I) (S is the sectional area (cm ² ) of the water supply pipe, L is the length (cm) of the water supply pipe through which the air mixed water flows, and W is the washing time. Water flow (L/min)).

After the backwashing step, the raw water is supplied to the water treatment device main body via the water supply pipe, and the effluent water from the main body of the water treatment device is discharged to the final washing step outside the system, thereby washing and then When the operation is started, high-quality treated water can be obtained (third invention).

Periodically or as needed, the air-mixed water is supplied to the treated water pipe and then discharged to the treated water pipe air cleaning step outside the system, so that the contaminated substances such as microorganisms in the treated water pipe can be peeled off and washed. (Fourth invention).

In the case where the treatment water tank for storing the treated water from the treated water pipe and the treated water in the treated water tank are supplied as backwash water to the backwashing water pipe of the water treatment device main body, before the backwashing step By performing the step of supplying the air-mixed water to the backwashing water pipe and discharging it to the backwashing water pipe air cleaning step outside the system, the pollutants such as microorganisms in the backwashing water pipe can be peeled off and washed. The contaminant in the backwashing water pipe and the backwashing water are prevented from flowing into the main body of the water treatment apparatus in the backwashing step (the fifth invention).

In the washing step of the backwashing water pipe, the air is mixed with water, and the connection portion between the backwashing water pipe and the treated water pipe passes through the backwashing water pipe, flows to the treated water pipe, and is discharged to the outside of the system. Then, the treated water pipe can be washed together with the backwashing water pipe (the sixth invention).

Embodiments of the present invention will be described in detail below with reference to the drawings.

In the present invention, the step of washing the air for supplying the water supply pipe of the water treatment device is referred to as "air cleaning step 1", and the air for treating the water treatment pipe or the backwashing water pipe of the water treatment device is washed. The step is called "air cleaning step 2" or "air cleaning step 3".

[Embodiment 1]

First, an example of an embodiment of the present invention will be described with reference to Figs. 1 to 5 .

1 to 5 are system diagrams showing a filter device according to an embodiment of a method for cleaning a water supply pipe of a water treatment device according to the present invention, and Fig. 2 is a view showing an air cleaning step 1 of the present invention (water supply pipe air washing) 3 is a display view of the air washing step 2 (the step of the backwashing pipe and the treated water pipe air washing step), and FIG. 4 is a view showing the backwashing step of the present invention. Fig. 5 is a view showing the final washing step of the present invention. In Fig. 2 to Fig. 5, the piping through which the fluid flows is displayed in a thicker solid line than the piping in which the fluid does not flow. The fluid flow valve is blacked out.

In the first to fifth figures, 1 is a raw water tank, 2 is a filter, 3 is a treatment tank, P ₁ is a raw water pump, P ₂ is a backwash pump, and V ₁ and V ₇ are air inlets. Valve, V ₂ is the filter inlet valve, V ₃ is the filter outlet valve, V ₄ is the backwashing outlet valve, V ₅ is the backwashing inlet valve, V ₆ and V ₈ are the washing outlet valve, and V ₉ is the treatment sink Inlet valve. 11~23 means piping. X ₁ to X ₅ indicate piping connections.

Air injection pipe 16 is provided in the vicinity of the discharge portion of the raw water pump P ₁ is, usually air injection pipe 16 and the water supply pipe pipe distance of _1, the discharge portion of the raw water pump P ₁ is connected to portion X 12 is 50cm or less. The distance between the connection portion X _{2 of the} drain discharge drain pipe (the backwash drain pipe) 17 and the water supply pipe 12 and the raw water introduction port 2A of the filter 2, that is, the length of the pipe 13, is usually 20 ~200cm or so.

Air injection pipe 21 is provided backwashing the vicinity of the discharge portion of the pump P _2, the normal air filling connection portions X pipe 21 and the backwash water pipe 19 _4, and the backwashing distance pipe pump P discharge portion ₂ of It is 50cm or less. The distance between the connection portion X _{3 of the} backwashing pipe 19 and the treated water pipe 15 and the treated water discharge port 2B of the filter 2, that is, the length of the pipe 14 is usually about 20 to 200 cm, and the backwashing water pipe 19 is provided. In the vicinity of the treated water discharge port 2B of the filter 2 among the treated water pipes. The distance between the connection portion X _{5 of the} pipe (washing drainage pipe) 22 and the treated water pipe 15 and the treated water inlet 3A of the treated water tank 3 is discharged from the washing water pipe 19 and the washing water drain of the treated water pipe 15 . That is, the length of the pipe 23 is usually about 50 to 500 cm.

It is not limited to the filtering devices of Figs. 1 to 5, and in any of the water treatment devices, the air is injected into the piping so that the air does not enter the pump and is connected to the discharge side of the pump.

When the raw water is filtered, the filter inlet valve V ₂ , the filter outlet valve V ₃ , and the treatment tank inlet valve V _{9 are} opened, the other valves are closed, and the raw water pump P ₁ is actuated to make the backwash pump P _{2 is} stopped, and the raw water in the raw water tank 1 is introduced into the filter 2 through the pipe 11, the pipe 12, and the pipe 13, and is filtered, and the filtered water is introduced into the pipe 14, the pipe 15, and the pipe 23 through the pipe 14, Handle the sink 3.

By continuing the filtration operation, the pressure loss may increase due to contamination in the system, or other missing conditions may occur, or after the predetermined filtration operation is continued, the following steps (1) to (7) are periodically performed. net.

(1) Air washing step (water supply piping air washing step) (Fig. 2)

The raw water pump P _{1 is} kept running, and the air inlet valve V ₁ and the backwashing outlet valve V _{4 are} opened, and the filter outlet valve V ₃ and the treatment tank inlet valve V _{9 are} closed (that is, only the air inlet valve V _{1 is} filtered The inlet valve V ₂ and the backwashing outlet valve V _{4 are} opened, and the other valves are closed. The compressed air is injected into the water supply pipe 12 from the air, and the gas-liquid mixed fluid of raw water and air flows through the water supply pipe 12 . The air is washed, and the washing drainage is discharged from the piping 17.

In the air pipe 16 air is blown in the washing step 1, the raw water is equal to the flow rate during the normal filtration operation flow in the water supply pipe 12, it is provided by the air injected in the vicinity of the raw water pump P ₁ The raw water is a mixed fluid, and when it flows in the water supply pipe 12, turbulent flow is generated in the pipe 12, and contaminants such as microorganisms adhering to the inner wall of the pipe 12 are peeled off. The gas-liquid mixed flow including the impurities such as the exfoliated microorganism block passes through the inlet valve V ₂ and flows into the partial pipe 13 to open the backwashing outlet valve V _{4 to} open the other valve portion V ₃ , When V ₅ and V _{6 are} closed, they hardly enter the filter 2 and are discharged from the pipe 17 to the outside of the system.

In the air washing step, the piping 12 on the upstream side of the above-described connecting portion X ₂ is air-washed in the water supply pipe.

The washing water for air-mixing water in the air washing step 1 is not limited to raw water, and may be filtered water or other system water.

(2) Stop step 1

After the air washing step 1, the next washing step may be performed immediately, or the rest step may be interposed. The presence or absence of a stop step does not particularly affect the cleaning effect.

When the rest step is performed, all the valve portions are closed, and the raw water pump P ₁ and the backwashing pump P _{2 are} stopped.

(3) Air washing step 2 (step of backwashing water piping and treated water piping air washing) (Fig. 3)

In the filtration device of the present embodiment, the treated water pipe or the backwashing water pipe through which the water flows may have serious microbial growth or contamination due to the water supply pipe, and particularly the pollutant attached to the backwashing water pipe. When it is peeled off during the backwashing treatment and flows into the filter 2, it causes secondary pollution.

Therefore, it is preferable to treat the water piping and the backwashing water piping when the treated water is used as the backwashing water, and also to clean the air with the air mixed water to remove the pollutants, and to discharge the system.

Thus, the outlet valve V of the air cleaning step 2, in order to air mixing water backwash water pipe 19 and the treated water pipe 15 to be cleaned, the air inlet valve V ₇ and backwashing V ₅ with an inlet valve, a filter ₃ The cleaning outlet valve V _{8 is} opened, the other valve portions are closed, the backwashing pump P ₂ is actuated (the raw water pump P _{1 is} stopped), the air is injected into the pipe 21, and the compressed air is injected into the backwashing water pipe 19 The gas-liquid mixed fluid of the treated water and the air from the treatment tank 3 that has been transported through the pipe 18 flows from the backwashing pipe 19 through the connection portion X ₃ to the treated water pipe 15 to be air-washed, and the pipe 22 The washing drain is discharged to the outside of the system.

In the air washing step 2, the treated water from the treatment tank 3 flows in the backwashing water pipe 19 and the treated water pipe 15 at the same flow rate as the flow rate of the backwashing step described later. The air blown into the air injection pipe 21 near the washing pump P ₂ and the treated water become a mixed fluid, and flow into the backwashing water pipe 19 and the treated water pipe 15, thereby generating in the pipes 19 and 15. In the turbulent flow, contaminants such as microorganisms adhering to the inner walls of the pipes 19 and 15 are removed and removed. The gas-liquid mixed flow including the impurities such as the exfoliated microorganism block flows into the partial pipe 23, and the treatment tank inlet valve V ₉ provided near the inlet of the treatment tank is closed, and the gas is hardly entered into the treatment tank. In 3, it is discharged to the outside of the system by the piping 22.

2 by the air cleaning step, the backwash water in the pipe, and the connecting portions X ₄ inverse portion between the connecting portion ₃ X wash water pipe 19, into the process water pipe connecting portion and the connecting portion ₃ X A portion of the treated water piping 15 between X ₅ is air-washed.

In the air cleaning step 2, although they can not be backwashed with water in a pipe, to be washed with the backwash pipe 18 upstream of the pump P _2, and by using the backwash pump as close to the process P ₂ The treated water outlet 3B of the water tank 3 can make the non-cleaning portion of the pipe almost disappear. However, when the length of the pipe 15 is about several m (1 to 5 m), the cleaning liquid introduction means is provided in the vicinity of the treatment water tank 3 of the pipe 15, and when the valve portion is provided closer to the treatment water tank than the cleaning liquid introduction means, It is possible to perform a left and right washing process from several days to several weeks.

The length of the pipe 14 is at most about 20 to 200 cm with respect to the pipe 14 between the connection portion X ₃ and the treated water discharge port 2B of the filter 2, and there is no problem even if it is a non-cleaning portion.

In the same manner, the connection portion X _{5 is} disposed in the vicinity of the treated water inlet 3A with respect to the pipe 23 between the connection portion X ₅ and the treated water inlet 3A of the treatment tank 3, and the length of the pipe 23 is set to 500 cm or less. If it is set to 100~200cm, the non-washing part can be almost eliminated.

The air-mixed water from the backwash water pipe 19 may flow from the connection portion X ₃ to the partial pipe 14, and by closing the filter inlet valve V ₂ and the backwashing outlet valve V ₄ , there is almost no flow into the filter. Inside the device 2.

This air washing step 2 is carried out before the backwashing step in order to prevent the contaminant in the backwashing water pipe from flowing into the filter 2 during the backwashing step, as long as it is before the backwashing step, in the above air washing It can be done before or after the net step 1.

Although the air washing step 2 can also be carried out simultaneously with the air washing step 1, it is usually carried out separately.

In the air washing step 2, the backwashing water pipe and the treated water pipe are simultaneously air-washed, and the backwashing water pipe and the treated water pipe may be separately washed.

For example, the air inlet valve V _{7 , the} backwashing inlet valve V ₅ , and the purge outlet valve V _{6 are} opened, the other valve portions are closed, and the backwashing pump P ₂ is actuated (the raw water pump P _{1 is} stopped). The compressed air from the air injection pipe 21 and the gas-liquid mixed fluid from the treated water in the treatment tank 3 are flowed to the backwashing water pipe 19 to be air-washed, and the washing water is passed through the connecting portion X ₃ from the pipe 20 When it is discharged to the outside of the system, only the backwashing water pipe 19 can be washed.

In the air cleaning step 2 of the second embodiment to be described later, an air injecting pipe for injecting air into the treated water pipe 15 is provided in advance, and an air inlet valve for injecting the air into the pipe and a filter inlet valve V ₂ are provided in advance. The filter outlet valve V ₃ and the purge outlet valve V _{8 are} opened, the other valve portions are closed, the raw water pump P ₁ is actuated, the backwash pump P _{2 is} stopped, and the raw water is introduced through the pipe 12 and the pipe 13 In the filter 2, the gas-liquid mixed fluid of the treated water and the air from the filter 2 is caused to flow to the pipe 15, and is discharged from the pipe 22 to the outside of the system, whereby the air of the treated water pipe 15 can be washed.

In this case, however, it is preferable that the washing treatment of the backwashing water pipe is performed before the backwashing step, and only the washing of the water pipe is performed to reverse the water supply pipe 13. It is preferably carried out after the washing step, and may also be carried out after the final washing step described later.

The washing water for the air-mixing water in the air washing step 2 is not limited to the treated water, and may be raw water or other system water.

This air washing step 2 is not essential and may be omitted as appropriate. In other words, the water supply pipe for raw water has a microbial mass (mud ball) that has been in the raw water tank 1 and flows in, so it is necessary to carry out a relatively frequent washing process, and the treated water pipe through which the raw water is filtered and treated. Or backwash water piping, and there is no problem of microbial reproduction like raw water supply piping. Therefore, the air cleaning step 2 for performing the washing of the backwashing water pipe or the treated water pipe is the air washing step 1 and the backwashing step described later in comparison with the washing of the water supply pipe for producing raw water. Even if the washing frequency is low, it can be omitted because of the water quality of the treated water.

(4) Stop step 2

Immediately after the air washing step 2, the backwashing step may be carried out, or a stop step may be interposed. There are no stopping steps, and there is no particular effect on the cleaning effect.

In the case of the stop step, all the valve portions are closed, and the raw water pump P ₁ and the backwashing pump P _{2 are} stopped.

(5) Backwashing step (Fig. 4)

As described above, in the air cleaning step 1, the peeling and cleaning of the portion of the water supply pipe 12 can be performed. However, in the water supply pipe, the pipe 13 on the downstream side of the connection portion X ₂ of the backwashing drain pipe 17 is not provided. Part of the washing is carried out, and a part of the washing water in the air washing may be partially flowed into the piping portion 13 or the inlet portion in the filter 2 together with the peeled microorganisms and the like.

Therefore, in the present invention, after the air washing step 1, 2 or the air washing step 1, the back washing step is performed, and the inside of the filter 2 and the piping 13 are washed.

In step backwashing, backwashing with the inlet valve V _5, and opening the outlet valve backwashing V _4, the other valves closed section, so that by actuating the backwashing pump P _2, P ₁ so that the raw water pump is stopped, so that The treated water in the treatment tank 3 passes through the pipe 18, the pipe 19, and the pipe 14 to flow back to the filter 2, and the backwashing drain is discharged to the outside of the system through the pipe 13 and the pipe 17.

Thereby, the inside of the filter 2 and the piping 13 which cannot be cleaned by the air washing step 1 are washed, and the pollutants can be discharged to the outside of the system.

(6) Stop step 3

After the backwashing step, the filtration operation may be started immediately. After the final washing step described later, the filtration operation may be started, and the stopping step may be performed at intervals of the filtering operation or the final cleaning step. .

There are no stopping steps, and there is no particular effect on the cleaning effect. When the rest step is performed, all the valve portions are closed, and the raw water pump P ₁ and the backwashing pump P _{2 are} stopped.

(7) Final cleaning step (Fig. 5)

When the final cleaning process is performed, the filter inlet valve V ₂ and the purge outlet valve V _{6 are} opened, the other valve portions are closed, and the raw water pump P ₁ is actuated to stop the backwashing pump P ₂ . The raw water in the water tank 1 is introduced into the filter 2 through the pipe 11, the pipe 12, and the pipe 13, and is discharged to the outside of the system through the pipe 14, the pipe 20, and the pipe 17.

In the first to fifth figures, the pipe 20 for discharging the washing water is connected to the backwashing drain pipe 17, and the pipe 20 is not connected to the backwashing drain pipe 17, and is directly washed. Drainage is discharged.

This final washing treatment is not required, and by performing the final washing treatment, the contaminants remaining on the outlet side of the filter 2 (contaminants peeled off from the filter medium in the backwashing step) can be discharged. In addition to raw water, the washing water in the final washing treatment may be treated with filtered water or other system treated water.

After the series of washing steps, the filter inlet valve V ₂ and the filter outlet valve V _{3 are} opened, the other valve portions are closed, and the raw water pump P ₁ is actuated to stop the backwashing pump P ₂ . The filtration operation of raw water is started again.

[Embodiment 2]

Next, other examples of the embodiment of the present invention will be described with reference to Figs. 6 to 10 .

6 to 10 are system diagrams showing a filter device according to an embodiment of a method for cleaning a water supply pipe of a water treatment device according to the present invention, wherein FIG. 7 is an air cleaning step 1 (water supply pipe air of the present invention) Fig. 8 is a view showing the air washing step 2 (the treated water pipe air washing step) of the present invention, and Fig. 9 is a display view of the back washing step of the present invention, and Fig. 10 It is a display diagram of the final washing step of the present invention. In Figs. 7 to 10, the piping through which the fluid flows is displayed as a thicker solid line than the piping in which the fluid does not flow. The valve portion of the fluid flow is blackened.

The filter device shown in Figs. 6 to 10 differs from the filter device shown in Figs. 1 to 5 in that it is not treated water, but is cleanliness from tap water, industrial water, etc. outside the system. higher water backwashing process, there is provided a backwashing pipe 19 with water, washed with backwashing inlet valve V _5, and inverse with _2, other configurations are the same as the pump P composition.

In Figs. 6 to 10, members having the same functions as those shown in Figs. 1 to 5 are denoted by the same reference numerals.

The filtration device, the raw water filtration treatment, the air cleaning step 1 (Fig. 7), the backwashing step (Fig. 9), and the final washing step (Fig. 10) are shown in Figs. 1 to 5; The air washing step 1 (Fig. 2), the back washing step (Fig. 4), and the final washing step (Fig. 5) of the filter device shown are similarly carried out.

Then, the description will be omitted for the air washing step 1, the back washing step, and the final washing step. Hereinafter, the air washing step 2 for performing air washing of the treated water pipe will be described with reference to FIG.

In the filter device of the present embodiment, the backwashing water pipe is such that water that does not propagate by microorganisms such as industrial water or tap water flows. Therefore, it is not necessary to perform air washing for the backwashing water pipe 19.

Then, in the air washing step 2, the filter inlet valve V ₂ , the filter outlet valve V ₃ , the air inlet valve V _{7 ,} and the purge outlet valve V _{8 are} opened, the other valve portions are closed, and the raw water pump P ₁ is actuated. (The backwashing pump P _{2 is} stopped), the compressed air is injected into the treated water pipe 15 from the air injection pipe 21, and the raw water in the raw water tank 1 is introduced into the filter through the pipe 11, the pipe 12, and the pipe 13. (2) The gas-liquid mixed fluid of the treated water and the air from the pipe 14 is flowed to the treated water pipe 15 to be air-washed, and the washing water is discharged from the pipe 22 to the outside of the system to cause contamination in the treated water pipe 15. The substance is removed and discharged to the outside of the system.

In the present embodiment, the air cleaning step 2 does not necessarily need to be performed before the backwashing step, and may be performed after the backwashing step. It may be carried out before the air washing step 1, and may be carried out after the final washing step. In the same manner as in the first embodiment, the air washing step 2 can be omitted as appropriate, and the water used for air washing is not limited to raw water, and water from outside the system such as industrial water can be used.

[Embodiment 3]

Next, another example of the embodiment of the present invention will be described with reference to Figs. 11 to 17 .

11 to 17 are views showing an embodiment of a method for cleaning a water supply pipe of a water treatment device according to the present invention, which is a system diagram of a water treatment device including a filter and a cation exchange column, wherein FIG. 12 is a view of the present invention. FIG. 13 is a view showing a display of the air cleaning step 1 (water supply pipe air cleaning step), and FIG. 13 is a view showing the air cleaning step 2 (filtering water pipe air cleaning step) of the present invention, and FIG. 14 is a view of the present invention. Figure 15 is a diagram showing the final cleaning step 1 of the present invention, Figure 16 is a display diagram of the final cleaning step 2 of the present invention, and Figure 17 is an air cleaning step of the present invention. 3 (Displaying of cation exchange water pipe air cleaning step).

In Fig. 12 to Fig. 17, the piping through which the fluid flows is shown by a thicker solid line than the piping in which the fluid does not flow. The valve portion of the fluid flow is blacked out.

In the water treatment device shown in Figs. 11 to 17 , a cation exchange column 4 is further provided in the rear stage of the filter device shown in Figs. 6 to 10, and the filter device is formed and imaged in Fig. 6 to The same construction shown in Fig. 11 is denoted by the same reference numerals for the members that achieve the same function.

P ₃ is the backwashing pump of the ion exchange column 4, V ₁₁ and V ₁₂ are the purge outlet valves, V ₁₀ is the cation exchange inlet valve, V ₁₃ is the backwashing inlet valve, and V ₁₄ is the air inlet valve, V _{14 15} is a cation exchange outlet valve.

24 to 31 indicate piping, and X ₆ to X ₈ indicate piping connections.

The pipe distance between the pipe connecting portion X ₅ and the inlet 4A of the cation exchange column 4, that is, the length of the pipe 23 is usually about 20 to 200 cm, and between the pipe connecting portion X ₈ and the treated water inlet 3A of the treatment tank 3 The piping distance, that is, the length of the piping 27 is usually about 50 to 500 cm.

The distance between the connection portion X _{6 of the} backwashing water pipe 30 and the cation exchange treated water pipe and the pipe exchange distance of the cation exchange treated water discharge port 4B of the cation exchange column 4, that is, the length of the pipe 24 is usually about 20 to 200 cm, and the backwashing water is used. The piping 30 is provided in the vicinity of the treated water discharge port 4B of the cation exchange tower 4 which is provided in the cation exchange treated water piping. In addition, the distance between the connection portion X _{8 of the} pipe (washing drainage pipe) 28 and the treated water pipe 26 for discharging the washing water of the cation exchange water pipe 26 and the treated water inlet 3A of the treated water tank 3 is also That is, the length of the pipe 27 is usually about 50 to 500 cm.

The connection portion X _{7 of} the air injection pipe 31 and the cation exchange treated water pipe is provided in the vicinity of the connection portion X _{6 of the} backwash water pipe 30 and the treated water pipe 24, and can be air-washed regardless of the length of the pipe 25. .

When the raw water is treated, the filtration inlet valve V ₂ and the filtration outlet valve V ₃ , the cation exchange inlet valve V ₁₀ and the cation exchange outlet valve V _{15 are} opened, and the other valve portions are closed to make the raw water pump P ₁ When the backwashing pumps P ₂ and P _{3 are} stopped, the raw water in the raw water tank 1 is introduced into the filter 2 through the pipe 11, the pipe 12, and the pipe 13 to be filtered, and the filtered water is passed through the pipe 14 The piping 15 and the piping 23 are introduced into the cation exchange tower 4 to perform cation exchange treatment, and the cation exchange treated water is introduced into the treatment tank 3 through the piping 24, the piping 25, the piping 26, and the piping 27.

By continuing the water treatment operation, the pressure loss is increased due to contamination in the system, or other missing conditions occur, or after the predetermined filtration operation is continued, the following (1) to (7) are periodically used. Wash in order.

(1) Air washing step 1 (water supply piping air washing step) (Fig. 12)

The step of cleaning the air filtering device 1 shown in FIG. 10 - FIG. 1 in the same manner, the raw water pump P ₁ to maintain the operation, the air inlet valve V ₁ and open the outlet valve backwashing V _4, the filter outlet Valve V ₃ , cation exchange inlet valve V ₁₀ , cation exchange outlet valve V ₁₅ and treatment tank inlet valve V _{9 are} closed (ie only air inlet valve V ₁ , and filtration inlet valve V ₂ and backwash outlet valve V _{4 )} When the other valve portion is opened, the air is injected into the pipe 16, and the compressed air is injected into the water supply pipe 12, and the gas-liquid mixed fluid of the raw water and the air flows to the water supply pipe 12 to perform air washing, and the washing water is drained from the pipe. 17 discharged.

In the air cleaning step, raw water and air is usual raw water during operation of the filter at the same flow rate flowing within the water supply pipe 12, disposed in the vicinity of the air injected from the raw water pump P ₁ is blown pipe 16 The mixed fluid flows into the water supply pipe 12 to cause turbulence in the pipe 12, and the contaminants such as microorganisms adhering to the inner wall of the pipe 12 are peeled off. The gas-liquid mixed flow including the impurities such as the microbial block removed by the peeling is passed through the filtration inlet valve V ₂ and flows into the partial pipe 13, and the other valve portion V _{3 is} opened by opening the backwashing outlet valve V ₄ , When V ₅ and V _{6 are} closed, they hardly enter the filter 2 and are discharged from the pipe 17 to the outside of the system.

In the air cleaning pipe, the pipe 12 on the upstream side of the above-described connecting portion X ₂ is air-washed in the water supply pipe of the filter 2. The washing water for air-mixing water in the air washing step 1 is not limited to raw water, and it is also possible to use filtered water or other system water.

(2) Stop step 1

After the air washing step 1, the next step may be performed immediately, and the step may be stopped. The presence or absence of a stop step has no particular effect on the cleaning effect.

When the rest step is performed, all the valve portions are closed, and the raw water pump P ₁ and the backwashing pumps P ₂ , P _{3 are} stopped.

(3) Air washing step 2 (filtering water piping air cleaning step) (Fig. 13)

In the air washing step 2, similarly to the air washing step 2 of the filtering device shown in Figs. 6 to 10, the filtration inlet valve V ₂ , the filtration outlet valve V ₃ , the air inlet valve V ₇ , and the cation exchange are provided. The inlet valve V ₁₀ and the purge outlet valve V _{8 are} opened, the other valve portions are closed, and the raw water pump P ₁ is actuated (the backwashing pumps P ₂ and P _{3 are} stopped), and the air flows into the pipe 21 to be compressed. The air is injected into the treated water pipe 15, and the raw water in the raw water tank 1 is introduced into the filter 2 through the pipe 11, the pipe 12, and the pipe 13, and the mixed water of the treated water and the air from the pipe 14 flows. The treated water pipe 15 is air-washed, and the washing water is discharged from the pipe 22, and the pollutants in the filtered water pipe 15 are removed and discharged to the outside of the system.

This air washing step 2 does not have to be performed before the backwashing step 1, and may be performed after the backwashing step 1. It may be carried out before the air washing step 1, and may be carried out after the final washing step. In the same manner as in the second embodiment, the air washing step 2 can be omitted as appropriate.

(4) Stop step 2

Immediately after the air washing step 2, the next washing step may be performed, and the stopping step may be performed. The presence or absence of a stop step has no particular effect on the cleaning effect.

When the rest step is performed, all the valve portions are closed, and the raw water pump P ₁ and the backwashing pumps P ₂ , P _{3 are} stopped.

(5) Backwashing step (Fig. 14)

In the air cleaning step 1, the portion of the water supply pipe 12 of the filter 2 can be removed, and the pipe 13 on the downstream side of the connection portion X ₂ of the backwashing drain pipe 17 can be removed. In addition to the partial washing, the washing water at the time of air washing may partially flow into the inlet portion of the pipe 13 or the filter 2 together with the peeled microorganisms.

In the same manner, in the air cleaning step 2, the peeling and washing of the portion of the filtration treatment water pipe 15 serving as the water supply pipe of the cation exchange column 4 can be performed, and among the pipes, the pipe 23 on the downstream side of the connection portion X ₅ is provided. The part cannot be washed.

Therefore, in the present invention, after the air cleaning steps 1 and 2 or the air cleaning step 1 described above, a backwashing step is performed to clean the inside of the filter 2 and the piping 13, 23 and the cation exchange column 4. .

Backwashing step, the backwash _4, V ₈ opened by the inlet valve V _5, V ₁₃ and backwashing the outlet valve V, the other valve portion closing the backwash _2, P ₃ actuating a pump P, so that raw water pump P ₁ is stopped, so that the reverse washing water from the outside of the system through the pipe 19 and the pipe 14 counterflow to the filter 2, the backwash discharge through the drain pipe 13 and the pipe 17 to the outside of the system. The backwash water is returned to the cation exchange column 4 through the pipes 30 and 24, and is discharged to the outside of the system through the pipe 23 and the pipe 22.

Thereby, the inside of the filter 2 and the cation exchange column 4 and the pipes 13 and 23 which are not cleaned in the air washing steps 1 and 2 are washed, and the pollutants can be discharged to the outside of the system.

The backwashing treatment of the filter 2 and the backwashing treatment of the cation exchange column 4 may be carried out simultaneously or separately. When performing separately, which process can be performed first.

The piping 23 and the cation exchange column 4 are required to allow the filtration treatment water having less problem of biological growth than the raw water phase. Therefore, it is not necessary to perform air cleaning as often as the pipe 13 or the filter 2, so the cation exchange tower is not required. 4 and the backwashing treatment of the piping 23 which becomes this water supply piping can be suitably abbreviate|omitted, or it can carry out by the frequency of the back-processing of the piping 13 or the filter 2 less.

(6) Stop step 3

After the backwashing step, the filtration operation may be restarted immediately. After the final washing steps 1 and 2 or the air washing step 3 described later, the water treatment operation may be started again, or the water treatment operation may be performed. The interval of the washing step described later may be a step of stopping.

The presence or absence of a stop step has no particular effect on the cleaning effect. When the rest step is performed, all the valve portions are closed, and the raw water pump P ₁ and the backwashing pumps P ₂ , P _{3 are} stopped.

(7) Final cleaning steps 1, 2 (Fig. 15, Fig. 16)

When the final cleaning of the filter 2 is performed, the filter inlet valve V ₂ and the purge outlet valve V _{6 are} opened in the same manner as in the case of the filter devices of Figs. 1 to 10, and the other valve portions are closed. The pump P ₁ is actuated to stop the backwashing pumps P ₂ and P ₃ , and the raw water in the raw water tank 1 is introduced into the filter 2 through the pipe 11 , the pipe 12 , and the pipe 13 , and passes through the pipe 14 and the pipe 20 . The pipe 17 is discharged to the outside of the system (Fig. 15).

When the final cleaning process of the cation exchange column 4 is performed, the filtration inlet valve V ₂ and the filtration outlet valve V _{3 are} opened to the cation exchange inlet valve V ₁₀ and the purge outlet valve V _{12 to} close the other valve portions to make raw water. the pump P ₁ is actuated to allow backwashing with the pump P _2, P ₃ is stopped, the raw water in the raw water tank 1 through the pipe 11, the pipe 12 and the pipe 13 is introduced into the filter 2, and through the pipe 14, the pipe 15, The piping 23 is introduced into the cation exchange column 4, and is discharged to the outside of the system through the piping 24, the piping 29, and the piping 22.

After the series of washing steps, the filter inlet valve V ₂ and the filter outlet valve V _{3 are} opened to the cation exchange inlet valve V ₁₀ and the cation exchange outlet valve V _{15 to} close the other valves to make the water pump P ₁ is actuated to stop the backwashing pumps P ₂ and P ₃ , and the water treatment operation of the raw water is started again.

In an ion exchange column filled with a cation exchange resin such as a cation exchange column, the trace metal ions required for microbial growth are removed by the cation exchange resin in the column, so that there is no microbial growth for the piping after the ion exchange column. problem. Therefore, the piping for the ion exchange treatment water flowing through the ion exchange column does not require special air washing, and it is not completely free of microorganisms to be propagated, so it may be required to be used or lower than other washing steps. The washing frequency is air-washed for the piping after the ion exchange tower.

The water treatment device shown in Figs. 11 to 17 is provided with an air injection pipe 31. When the cation exchange water pipe is air-washed, as shown in Fig. 17, the inlet valve V ₂ and the filter outlet are filtered. The valve V ₃ , the cation exchange inlet valve V ₁₀ , the cation exchange outlet valve V ₁₅ , the air inlet valve V ₁₄ , and the purge outlet valve V _{11 are} opened, and the other valve portions are closed, so that the raw water pump P ₁ is actuated (reverse When the washing pumps P ₂ and P _{3 are} stopped, the raw water in the raw water tank 1 is introduced into the cation exchange tower 4 through the piping 11, the piping 12, and the piping 13, and the cation exchange treated water from the pipings 24 and 25 is The air from the air injection pipe 31 passes through the pipe 26 together with the air mixed water, whereby the cation exchange treated water pipe 26 is air-washed, and the washing drain is discharged from the pipe 28 to the outside of the system.

When the air for cleaning the cation exchange water pipe 26 is cleaned, the treated water obtained by subjecting the raw water from the raw water tank 1 to filtration treatment and cation exchange treatment is not limited, and water from industrial water other than the system may be used. Air washing may be performed, and air washing in the water tank 3 may be used to perform air washing.

The air injection pipe 31 is connected to the backwash water pipe 30, and the cation exchange water pipe may be washed using air mixed water from the water outside the system.

[Air cleaning conditions]

In the air washing step 1 of washing the water supply pipe of the water treatment device such as a filter or a cation exchange tower, if the amount of air injected is too small, the peeling effect of the microorganisms is small, in order to obtain a sufficient washing effect. However, the need to increase the air cleaning step will result in reduced operational efficiency and increased displacement, which is not suitable. However, if the amount of air injection is to be increased, the size of the compressor or the like is increased in order to inject the compressed air, and the power consumption is increased, which impairs the economy. Therefore, the amount of air to be injected and the washing time of the air washing step are desirably adjusted so that a better washing effect can be obtained in addition to the suppression of the washing cost.

In the air cleaning step of the present invention, the amount of air injected, the object is cleaned per unit cross-sectional area of the water supply pipe of 1cm ² 4 ~ 10L / min, preferably 4 ~ 5L / min, the air cleaning step The washing time can be preferably three times or more the reference time T (minutes) calculated by the following formula (I).

T = {S × L × 0.001 / W} (I) (S is the sectional area (cm ² ) of the water supply pipe, and L is the length of the water supply pipe through which the air mixed water flows (the water supply pipe 12 of Fig. 1) Length) (cm), W is the amount of water (L/min) when washing.

If the amount of air injected is less than the above range, a sufficient washing effect cannot be obtained, and if too much, the economy is not good.

If the washing time is less than three times the above reference time T, a sufficient washing effect cannot be obtained. However, if the washing time is too long, it is not good, so the washing time is preferably five times or less of the above reference time T.

The water passing rate during air cleaning is usually about 0.5 to 2 m/s, and the amount of water that is washed by air varies depending on the cross-sectional area of the piping.

The air cleaning conditions of the air washing steps 2 and 3 for performing the air washing treatment of the backwashing water pipe or the treated water pipe are not like the problem of microbial growth of the water supply pipe, compared with the air of the water supply pipe. The washing conditions may be carried out under the same conditions as those of the air washing step 1 except for washing conditions having a low washing power.

For example, 2,3, amount of air injected into the air cleaning step of the present invention, the backwashing water per unit of treated water pipe or pipe cross sectional area of the cleaning object 1cm ² of 4 ~ 10L / min, the air cleaning step The washing time can be preferably three times or more the reference time T' (minutes) calculated by the following formula (I').

T'={S'×L'×0.001/W'}......(I') (S' is the cross-sectional area (cm ² ) of the backwashing water pipe or the treated water pipe, and L' is the air mixed water flow. The length of the backwashing water pipe or the treated water pipe (the length of the pipes 19 and 15 in Fig. 1) (cm), and W' is the water passing amount (L'/min) at the time of washing.

If the amount of air injected is less than the above range, a sufficient washing effect cannot be obtained, and if too much, the economy is not good.

If the washing time is less than three times the above reference time T', a sufficient washing effect cannot be obtained. However, if the washing time is too long, it is not good, so the washing time is preferably five times or less of the above reference time T'.

The water passing rate during air cleaning is usually about 0.5 to 2 m/s, and the amount of water that is washed by air varies depending on the cross-sectional area of the piping.

[Time of each washing step]

The specific conditions of the air washing steps 1 to 3, the backwashing step, and the final washing step and the stopping step which are required to be carried out according to the present invention are preferably carried out in the following times, although not particularly limited.

Air cleaning steps 1:1~10 minutes

Air cleaning steps 2, 3: 1~10 minutes

Backwashing step: 5~15 minutes

Stop step: 5 minutes or less

Final cleaning step: 5~10 minutes

[Water Treatment Target of Water Treatment Device] The water treatment device of the present invention is a method for cleaning a water supply pipe, which is easy to multiply by microorganisms, and contains a large amount of drainage of organic matter, particularly phosphorus and/or nitrogen containing nutrient salts of microorganisms. It is effective to wash the water supply pipe of the water treatment device to be treated by the drainage, and the applicable organic matter contains the water quality of the drainage, and the following water quality is exemplified. <organic matter contains drainage water quality>

Organic matter concentration: 0.1~100mg/L (as TOC)

SS concentration: 0~10mg/L

Phosphorus concentration: 0.1~1000mg/L (as P)

Nitrogen concentration: 0.1~20mg/L (as N)

[Water treatment device]

The structure of the water treatment device to be cleaned by the present invention is not particularly limited as long as the water treatment device includes a water treatment device main body in which a water treatment material is filled therein, and a backwashing treatment is performed periodically or as needed. The backwashing mechanism can be effectively used by connecting the air injection pipe to the water supply pipe or by connecting the air injection pipe to the process water pipe.

The water passing direction of the main body of the water treatment device is not particularly limited, and it may be either an upward flow mode or a downward flow mode.

In addition to sand, anthracite, and inert resin, various water filters such as waste ion exchange resins may be used as the water treatment material, and ion exchange resins or activated carbon may be used.

The water treatment device main body of the water treatment device to which the water treatment device water supply device of the present invention is applied is, for example, the following structure, and is not limited to these structures.

(1) A filter in which a filter material as a water treatment material is filled inside.

(2) An ion exchange column in which an ion exchange resin as a water treatment material is filled.

(3) A water softener in which an ion exchange resin as a water treatment material is filled.

(4) An activated carbon column in which activated carbon as a water treatment material is filled.

[Examples]

The present invention will be more specifically described below by way of Experimental Examples and Examples.

[Experimental Example 1]

In order to investigate the relationship between the air injection amount, the water supply amount, the air washing time, and the length of the water supply pipe during the air washing, an experiment was conducted to pass the organic material containing water to a transparent vinyl chloride pipe of 15 A (sectional area: 1.8 cm ² ) Inject air into the air at a frequency of twice a day for air cleaning. The amount of water permeated by the organic matter is 8.3 L/min, and the amount of air injected and the injection time (time of the air washing step) are variously changed.

Two months after the experiment was carried out, the adhesion of microorganisms on the inner wall of the pipe was visually observed at each point 5 m, 15 m, and 30 m from the air injection point, and if it was considered that no microorganism was attached and sufficient washing effect was obtained, When the evaluation was "○", it was considered that there was adhesion of microorganisms, and if the washing effect was insufficient, the evaluation was "x", and the results are shown in Tables 1-3.

It can be seen from Tables 1 to 3 that the air injection amount or air cleaning time for obtaining a sufficient air cleaning effect has a lower limit, and for the cleaning time, T = {pipe sectional area (1.8 cm ² ) × piping It is preferably three times or more the length (500 cm, 1500 cm or 3000 cm) × 0.001 ÷ water amount (8.3 L/min)} (minutes).

[Example 1]

In the filtration apparatus (filter material: anthracite) of the first drawing in which the filtered raw water of the following water is filtered, the pump and the valve are opened and closed in the timing chart shown in Table 4 below, and the filtration operation of the raw water is The frequency of each of the two days is performed: a series of washing processes of the air washing step 1, the stopping step 1, the air washing step 2, the stopping step 2, the back washing step, the stopping step 3, and the final washing step.

<Filter raw water quality>

Organic concentration: 5mg/L (as TOC)

SS concentration: 1mg/L

Phosphorus concentration: 500mg/L (as p)

Nitrogen concentration: 5mg/L (as N)

The cross-sectional area of the water supply pipe is 1.8 cm ² , the length of the water supply pipe through which the air mixed water passes (the length of the pipe 12) is 500 cm, and the length of the water supply pipe (the length of the pipe 13) of the non-air cleaning portion is 20 cm. The water flow rate was 2 L/min, the air injection amount was 4 L/min, and the water flow amount during the backwash treatment was 2 L/min (the reference time T was 0.45 minutes).

The cross-sectional area of the backwashing pipe is 1.8 cm ² , the cross-sectional area of the treated water pipe is 1.8 cm ² , and the length of the backwashing water supply pipe and the treated water pipe through which the air mixed water passes (the total length of the pipe 19 and the pipe 15) is 500 cm, the length of the treated water pipe 14 in the non-air washing portion is 10 cm, the length of the pipe 23 is 5 cm, the water volume of the treated water in the air washing step 2 is 2 L/min, and the air injection amount is 4 L/min (reference time T) 'It is 0.45 minutes.'

As a result, after the operation for 6 months, it is considered that the water supply pipe can continue to operate stably without the adhesion and propagation of microorganisms.

The present invention has been described in detail with reference to the preferred embodiments of the invention.

The present application is based on the entire contents of the Japanese Patent Application No. 2008-073918, filed on March 21, 2008.

1. . . Sink

2. . . filter

3. . . Treatment sink

4. . . Cation exchange tower

11. . . Piping

12. . . Water supply piping

13. . . Piping

14. . . Piping

15. . . Treatment water piping

16. . . Air injection piping

17. . . Backwashing drainage pipe

18. . . Piping

19. . . Backwash water piping

20. . . Piping

twenty one. . . Air injection piping

twenty two. . . Piping

twenty three. . . Piping

twenty four. . . Treatment water piping

25. . . Piping

26. . . Cation exchange treatment water piping

27. . . Piping

28. . . Washing drainage pipe

30. . . Backwash water piping

31. . . Air injection piping

P ₁ . . . Raw water pump

P ₂ . . . Backwash pump

P ₃ . . . Backwash pump

V ₁ . . . Air inlet valve

V ₂ . . . Filter inlet valve

V ₃ . . . Filter outlet valve

V ₄ . . . Backwashing outlet valve

V ₅ . . . Backwashing inlet valve

V ₆ . . . Washing outlet valve

V ₇ . . . Air inlet valve

V ₈ . . . Washing outlet valve

V ₉ . . . Treatment sink inlet valve

V ₁₀ . . . Cation exchange inlet valve

V ₁₁ , V ₁₂ . . . Washing outlet valve

V ₁₃ . . . Backwashing inlet valve

V ₁₄ . . . Air inlet valve

V ₁₅ . . . Cation exchange outlet valve

X ₁ ~ X ₅ . . . Connection

X ₆ ~X ₈ . . . Piping connection

Fig. 1 is a system diagram showing a filtration device according to an embodiment of a method of cleaning a water supply pipe of a water treatment device according to the present invention.

Fig. 2 is an explanatory diagram of an air washing step 1 (water supply pipe air washing step) of the filtering device of Fig. 1 .

Fig. 3 is an explanatory diagram of an air washing step 2 (a step of cleaning the backwashing pipe and a step of washing the treated water pipe air) of the filter device of Fig. 1 .

Fig. 4 is an explanatory view of a backwashing step of the filter device of Fig. 1.

Fig. 5 is an explanatory view showing a final washing step of the filtering device of Fig. 1.

Fig. 6 is a system diagram showing a filtration device according to another embodiment of the method for cleaning the water supply pipe of the water treatment device according to the present invention.

Fig. 7 is an explanatory diagram of an air washing step 1 (water supply pipe air washing step) of the filter device of Fig. 6.

Fig. 8 is an explanatory view of the air washing step 2 (the water pipe cleaning step of the treated water pipe) of the filter device of Fig. 6.

Fig. 9 is an explanatory view of a backwashing step of the filter device of Fig. 6.

Fig. 10 is an explanatory view showing a final washing step of the filtering device of Fig. 6.

Fig. 11 is a system diagram showing a water treatment device according to another embodiment of the method for cleaning the water supply pipe of the water treatment device according to the present invention.

Fig. 12 is an explanatory diagram of an air washing step 1 (water supply pipe air washing step) of the water treatment device of Fig. 11 .

Fig. 13 is an explanatory diagram of an air washing step 2 (filtering water pipe air washing step) of the water treatment device of Fig. 11 .

Fig. 14 is an explanatory view showing a backwashing step of the water treatment apparatus of Fig. 11.

Fig. 15 is an explanatory view of the final washing step 1 of the water treatment apparatus of Fig. 11.

Fig. 16 is an explanatory view of the final cleaning step 2 of the water treatment apparatus of Fig. 11.

Fig. 17 is an explanatory diagram of the air washing step 3 (the cation exchange water pipe air washing step) of the water treatment device of Fig. 11 .

1. . . Sink

2. . . filter

2A. . . Raw water inlet

2B. . . Treatment water discharge

3. . . Treatment sink

3A. . . Treatment water inlet

3B. . . Treatment water outlet

11. . . Piping

12. . . Water supply piping

13. . . Piping

14. . . Piping

15. . . Treatment water piping

16. . . Air injection piping

17. . . Backwashing drainage pipe

18. . . Piping

19. . . Backwash water piping

20. . . Piping

twenty one. . . Air injection piping

twenty two. . . Piping

twenty three. . . Piping

P ₁ . . . Raw water pump

P ₂ . . . Backwash pump

V ₁ . . . Air inlet valve

V ₂ . . . Filter inlet valve

V ₃ . . . Filter outlet valve

V ₄ . . . Backwashing outlet valve

V ₅ . . . Backwashing inlet valve

V ₆ . . . Washing outlet valve

V ₇ . . . Air inlet valve

V ₈ . . . Washing outlet valve

V ₉ . . . Treatment sink inlet valve

X ₁ ~ X ₅ . . . Connection

Claims (11)

A water treatment device water supply pipe is filled with a water treatment material, and a water treatment device main body that is periodically or in need of backwashing treatment, and a water supply pipe that supplies raw water to the main body of the water treatment device a treatment water pipe for taking out the treated water from the main body of the water treatment device, a backwashing water pipe for supplying the backwash water to the main body of the water treatment device, and a water supply pipe connected to the water supply pipe for discharging the backwashing drain to the system The backwashing drain pipe is characterized in that the air-mixed water is supplied to the upstream side of the connection portion of the backwashing drain pipe and the water supply pipe, and the air is mixed with the air. The air cleaning step of the connection portion is discharged from the backwashing drain pipe, and then the backwash water is supplied to the water treatment device main body, and the backwashing water from the water treatment device main body passes through the connection portion from the counter The water supply pipe is washed by washing the backwashing step of the drain pipe. The scope of the patent application method of cleaning water supply pipe means to Item 1, wherein the step of cleaning the air to the air injection amount of the water supply pipe per unit sectional area of the supply pipe for the 1cm ² to 4 ~ 10L / Min, the washing time of the air washing step is three times or more the reference time T (minute) calculated by the following formula (I). T={S×L×0.001/W} (I) (S is the sectional area (cm ² ) of the water supply pipe, L is the length (cm) of the water supply pipe through which the air mixed water flows, and W is the washing time. Water flow (L/min)). The method of cleaning a water supply pipe for a water treatment device according to the first or second aspect of the invention, wherein after the backwashing step, the raw water is supplied to the main body of the water treatment device via the water supply pipe, and the water treatment is performed The effluent water from the main body of the device is discharged to the final washing step outside the system. The method for cleaning a water supply pipe of a water treatment device according to the first or second aspect of the invention, wherein the air-mixed water is supplied to the treated water pipe, and then discharged to a treatment water pipe outside the system for air cleaning step . The method of cleaning a water supply pipe for a water treatment device according to the first or second aspect of the invention, wherein the water treatment device includes a treatment water tank for storing treated water from the treated water pipe, and a treatment water tank in the treatment water tank The treated water is supplied to the backwashing water pipe of the water treatment apparatus main body as the backwashing water; and before the backwashing step, the air mixed water is supplied to the backwashing water pipe and then discharged to the outside of the system Wash water piping air cleaning steps. The method of cleaning a water supply pipe for a water treatment device according to the fifth aspect of the invention, wherein the backwashing water pipe is connected to the treated water pipe in the vicinity of the treated water discharge port of the water treatment device main body, in the backwashing step In the meantime, the air is mixed with water, and the connection portion between the treated water pipe and the backwashing water pipe passes through the treated water pipe, flows to the treated water pipe in the flow direction of the treated water, and is discharged to the treated water pipe. The backwashing water piping outside the system and the air piping cleaning process of the treated water piping. A method of cleaning a water supply pipe for a water treatment device according to the first or second aspect of the invention, wherein the water treatment device main body is a filter in which a filter medium is filled inside as the water treatment material. A method of cleaning a water supply pipe for a water treatment device according to the first or second aspect of the invention, wherein the water treatment device main body is an ion exchange column in which an ion exchange resin is filled as the water treatment material. A method of cleaning a water supply pipe for a water treatment device according to the first or second aspect of the invention, wherein the water treatment device main body is a water softener in which an ion exchange resin is filled inside as the water treatment material. A method of cleaning a water supply pipe for a water treatment device according to the first or second aspect of the invention, wherein the water treatment device main body is an activated carbon column in which activated carbon is filled as the water treatment material. A method of cleaning a water supply pipe for a water treatment device according to the first or second aspect of the invention, wherein the raw water is organic matter containing water.