JP4962366B2 - Water treatment supply system - Google Patents

Description

  The present invention relates to a water treatment and supply system that performs water treatment on raw water and supplies water to a water supply tank of a water-using device.

  For example, water-using equipment that uses a large amount of water, such as thermal equipment such as steam boilers, hot water boilers and cooling towers, cleaning equipment such as parts cleaning equipment used in semiconductor manufacturing and medical equipment cleaning equipment used in the medical field, has been conventionally used. Provided by.

  In these water-using devices, if raw water such as industrial water, tap water, and well water is used as it is, not only the prescribed performance cannot be obtained due to adhesion of impurities, generation of scale, occurrence of corrosion, etc., but the device itself May break down. For this reason, conventionally, raw water is treated by a water treatment device such as an activated carbon filtration device, a soft water device, a membrane filtration device, and a deaeration device, and the treated water is supplied to a water supply tank of a water-using device. Yes.

For example, the following Patent Document 1 discloses a water supply system that supplies water to a water supply tank of a boiler, and includes a system including a water softener and a deaeration device as a water treatment device.
JP-A-6-73763

  In the water supply system of Patent Document 1, even if an unexpected situation such as a power failure occurs and the water supply valve cannot be opened, water supply to the water supply tank is ensured and the water in the water supply tank does not become empty. Thus, the structure which provides a bypass line between the upstream of a water supply valve and a water supply tank is disclosed.

  However, in Patent Document 1, when the water softener is clogged and water is no longer supplied downstream, water cannot be supplied to the water supply tank. If the inside of the water supply tank becomes empty, the boiler will stop when it detects a low water level, and the equipment and equipment that use the steam supplied by the boiler will have to be stopped, especially for 24 hours. In factories where they are located, they suffer a lot of damage.

  The present invention has been made to solve the above problems, and in a water treatment supply system for supplying water treated by a water treatment device to a water supply tank, the water treatment device is clogged and water can be supplied downstream. It is an object of the present invention to provide a water treatment and supply system that can supply water without emptying a water supply tank of a water-using device even if it disappears.

In order to solve the above-described problems, a water treatment supply system according to the present invention is a water treatment supply system that supplies raw water to a water supply tank of a water-using device after performing water treatment on the raw water. A first water treatment device installed above, a second water treatment device installed on the water supply line upstream of the first water treatment device, the first water treatment device and the second water treatment A first bypass line connecting the water supply line and the water supply tank to a device; and a second bypass line connecting the water supply line and the water supply tank upstream of the second water treatment device; A water level sensor for measuring the water level in the water supply tank, and a bypass water supply opening in which the water level in the water tank is set to a position lower than the normal water supply start water level by the output of the water level sensor. When down to the water level, and a control means for opening the first bypass line or the second bypass line, to initiate a bypass water supply to the water supply tank,
It is characterized by providing.

  The water treatment supply method according to the present invention is the water treatment supply method in which raw water is treated with water by a plurality of water treatment devices installed on a water supply line and then supplied to a water supply tank of a water-using device. When the water level in the water drops to a predetermined first bypass water supply start water level, water is supplied to the water supply tank via a first bypass line that bypasses the first water treatment device closest to the water supply tank on the water supply line. Therefore, when the first bypass water supply step of opening the first bypass line and the water level in the water supply tank is lowered to a second bypass water supply start water level set at a position lower than the first bypass water supply start water level, the water supply Water is supplied to the water supply tank through a second bypass line that bypasses both the second water treatment device and the first water treatment device that are second closest to the water supply tank on the line. In addition, the water level in the water supply tank is set to a position lower than the normal water supply start water level by the second bypass water supply step of opening the second bypass line and the first bypass water supply step or the second bypass water supply step. And when returning to the bypass water supply stop water level set at a position higher than the first bypass water supply start water level, the bypass water supply stop step of closing the first bypass line and the second bypass line and stopping the bypass water supply, It is characterized by providing.

  According to the water treatment and supply system of the present invention, water can be supplied without emptying the water supply tank of the water-using device even if the water treatment device is clogged and water cannot be supplied downstream.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a system flow diagram schematically illustrating a water treatment supply system according to the present embodiment. As shown in the figure, the water treatment and supply system 10 according to the present embodiment measures the water level in the water supply line 4, the deaeration device 11 and soft water device 12 installed on the water supply line 4, and the water supply tank 5. A water level sensor 15, a first bypass line 16, a second bypass line 17, on-off valves 20 and 21, and a control circuit 25.

  The water treatment supply system 10 is a system that supplies treated water obtained by performing water treatment on raw water 3 such as industrial water, tap water, and well water to a water supply tank 5 of a water-using device such as a boiler via a water supply line 4. is there.

  In this embodiment, a deaeration device (first water treatment device) 11 and a soft water device (second water treatment device) 12 are installed as water treatment devices that perform raw water treatment. The soft water device 12 is a device that removes hardness components by passing raw water through an ion exchange resin to soften the water, and the degassing device 11 degassed by reducing dissolved oxygen in the raw water using a gas separation membrane. Device. The on-off valve 22 installed in the deaeration device 11 is a valve for controlling the start / stop of water supply to the normal water supply tank 5 via the water supply line 4.

  The water level sensor 15 is a semiconductor pressure sensor and is attached to the lower wall surface of the water supply tank 5. Of course, another sensor may be used as the water level sensor 15, and for example, a predetermined water level may be detected by a plurality of electrode bars having different lengths.

  The first bypass line 16 is a line that directly connects the water supply line 4 and the water tank 5 between the deaeration device 11 that is the first water treatment device and the soft water device 12 that is the second water treatment device, Whether the bypass water supply through the first bypass line 16 is performed or not is controlled by the on-off valve 20 installed in the middle. The second bypass line 17 is a line that directly connects the water supply line 4 and the water supply tank 5 on the upstream side of the water softening device 12 that is the second water treatment device, and an on-off valve 21 installed in the middle thereof, Whether or not to perform bypass water supply via the second bypass line 17 is controlled.

  The control circuit 25 is a control means for controlling the entire water treatment supply system 10, and communicates with the deaeration device 11, the soft water device 12, the water level sensor 15, and the on-off valves 20 and 21 as indicated by a dotted line in FIG. Connected as possible.

  As mentioned above, although the structure of the water treatment supply system 10 which concerns on this embodiment was demonstrated, the flow of a process in case water supply supply system 10 performs bypass water supply is demonstrated referring FIG. FIG. 2 is a diagram illustrating a set water level at which various processes are performed in the water treatment supply system according to the present embodiment.

  First, the significance of each set water level and the contents of the control process by the control circuit 25 when each set water level is reached will be described. In FIG. 2, the set water level HH is a high water level warning water level, and when the water supply to the water supply tank 5 does not stop due to some trouble and the water level in the water supply tank 5 rises to this position, the control circuit 25 An alarm is issued by the control. Specifically, for example, a warning sound is emitted from a speaker (not shown) or an alarm lamp is turned on.

  The set water level H is a normal water supply stop water level, and when normal water supply is performed via the water supply line 4, when the water level reaches this position, water supply from the deaerator 11 is stopped. The set water level L is a normal water supply start water level, and when the water level in the water supply tank 5 falls to this position, water supply via the normal water supply line 4 is started, and the water supply tank 5 is supplied until the set water level H is reached. Water is supplied.

  The set water level LL is a bypass water supply stop water level. When water supply to the water supply tank 5 is not performed due to a malfunction of the equipment on the water supply line 4 and the water level in the water supply tank 5 further falls below the set water level LL, bypass water supply described later is performed. When the water level in the water supply tank 5 returns to the set water level LL as a result of the bypass water supply, the on-off valve 20 and the on-off valve 21 are closed under the control of the control circuit 25, and the bypass water supply is performed. Stopped.

  In the present embodiment, the set water level LL also serves as a low water level warning water level. When water supply to the water supply tank 5 is not performed due to a malfunction of the equipment on the water supply line 4 and the water level in the water supply tank 5 is lowered to this position, an alarm is issued from a speaker (not shown) by the control of the control circuit 25. . The low water level warning water level can be set at any position as long as it is lower than the set water level L, which is the normal water supply start water level, but should be higher than the bypass water supply start water level described later. Is desirable. The advantages will be described later.

  The set water level B1 is a first bypass water supply start water level. When water supply to the water supply tank 5 is not performed due to a malfunction of the equipment on the water supply line 4 and the water level in the water supply tank 5 falls to this position, the on-off valve 20 is opened by the control of the control circuit 25, and the first The first bypass water supply via the bypass line 16 is started.

  According to the first bypass water supply, the water supply bypassing the deaeration device 11 as the first water treatment device is performed, so the water supply on the water supply line 4 is stopped due to a clogging or the like in the deaeration device 11. In such a case, water can be supplied into the water supply tank 5 by the first bypass water supply.

  The set water level B2 is the second bypass water supply start water level. If the water level in the water supply tank 5 is not recovered even by the first bypass water supply, that is, water supply into the water supply tank 5 is caused by a malfunction of the equipment upstream of the connection point between the first bypass line 16 and the water supply line 4. If the water level in the water supply tank 5 is lowered to this position without being performed, the control valve 25 opens the on-off valve 21 and the second bypass water supply via the second bypass line 17 is started.

  Next, the flow of the bypass water supply process in the water treatment supply system 10 when the water level of the water supply tank 5 has dropped below the set water level L (normal water supply start water level) due to clogging of the deaeration device 11 will be described. When the water level in the water supply tank 5 drops to the set water level B1 (first bypass water supply start water level), the on-off valve 20 is opened by the control of the control circuit 25.

  Here, since the water supply is stopped due to the clogging of the deaeration device 11, the water supply is normally supplied to the inlet of the deaeration device 11. Therefore, when the on-off valve 20 is opened, the soft water that has passed through the soft water device 12 is supplied into the water supply tank 5 through the first bypass line 16. Thereafter, when the water level in the water supply tank 5 is restored to the set water level LL (bypass water supply stop water level), the on-off valve 20 is closed so that the water that has not been degassed is not accumulated in the water supply tank 5 as much as possible. Bypass water supply is stopped.

  Then, water supply into the water supply tank 5 is performed by the first bypass water supply until the entire water treatment supply system 10 is stopped or the clogging of the deaeration device 11 is eliminated. However, since the water supplied by the first bypass water supply is a water containing a large amount of dissolved oxygen that has not been degassed, normal water supply can be repaired as soon as possible in order not to damage the water-using equipment in the subsequent process. It is desirable to return to the state.

  Next, the flow of the bypass water supply process in the water treatment supply system 10 when the water level of the water supply tank 5 drops below the set water level L (normal water supply start water level) due to clogging of the water softener 12 will be described. When the water level in the water supply tank 5 decreases to the set water level B1 (first bypass water supply start water level), the first bypass line 16 is opened as described above. However, since the water softener 12 is clogged, the first bypass water supply is not performed even if the on-off valve 20 is opened.

  Thereafter, when the water level in the water supply tank 5 is lowered to the set water level B2 (second bypass water supply start water level), the control valve 25 controls to open the on-off valve 21 of the second bypass line 17. Here, since the water supply is stopped due to the clogging of the water softening device 12, the water supply is normally supplied to the entrance of the water softening device 12. Therefore, when the on-off valve 21 is opened, the hard water before passing through the water softener 12 is supplied into the water supply tank 5 via the second bypass line 17 in the second bypass.

  Thereafter, when the water level in the water supply tank 5 is restored to the set water level LL (bypass water supply stop water level), the on-off valve 21 is closed so that hard water is not stored in the water supply tank 5 as much as possible, and the second bypass water supply is stopped. The Then, water supply into the water supply tank 5 is performed by the second bypass water supply until the entire water treatment supply system 10 is stopped or the clogging of the soft water measure 11 is eliminated. However, since the water supplied by the second bypass water supply is hard water, it is desirable to repair it immediately and return it to the normal water supply state via the water supply line 4 so as not to break down the water-using equipment in the subsequent process. .

  As described above, according to the present embodiment described in detail, since the bypass line for bypassing each water treatment device and supplying water to the water supply tank is provided on the upstream side of each water treatment device, the water treatment device has failed. Even in this case, it is possible to supply water to the water supply tank by bypassing the failed water treatment apparatus. In this way, it is not desirable for water-using equipment, but if the water tank can be prevented from emptying, it is not necessary to stop the water-using equipment, and the entire factory that operates 24 hours will be shut down. Can prevent the worst case.

  Moreover, according to this embodiment, both the 1st bypass line which bypasses the 1st water treatment apparatus (deaeration apparatus) located in the downstream, and both a 1st water treatment apparatus and a 2nd water treatment apparatus (soft water apparatus) Since the second bypass line that bypasses the first water treatment device is installed, when only the first water treatment device located downstream is broken down, the second water treatment device on the upstream side is opened by opening the first bypass line. The treated water that has passed through can be supplied to the water supply tank.

  In the present embodiment, the first bypass water supply start water level B1 at which the first bypass water supply from the downstream side is started is positioned higher than the second bypass water supply start water level B2 at which the second bypass water supply from the upstream side is started. By setting, when the water level in the water supply tank falls, the first bypass line is opened first, and the first bypass water supply is attempted. Thereby, even a little high quality water can be supplied to the water supply tank of the water using device. Therefore, it is desirable to install a water treatment apparatus that does not want to supply water that has not passed through the apparatus to the water supply tank as upstream as possible.

  Further, according to the present embodiment, when the water level in the water supply tank is lowered, the bypass water supply is automatically performed, so there is no need to separately provide a function for determining a failure of the water treatment device.

  Moreover, in this embodiment, since the low water level warning water level LL is set in a position higher than the bypass water supply start water levels B1 and B2, the user uses water equipment until the poor quality water is sent by the bypass water supply. It is possible to secure a time for determining whether to continue the operation or to stop the water-using equipment and not to perform the bypass water supply.

  Next, a modification of the present embodiment will be described with reference to FIG. FIG. 3 is a system flow diagram schematically showing a water treatment supply system according to a modification of the present embodiment. As shown in the figure, the water treatment supply system 30 according to this modification example includes a membrane filtration device 35 as a water treatment device in addition to the deaeration device 11 and the soft water device 12, and in accordance with this, A third bypass line 36 and an on-off valve 37 are added, and other configurations are the same as those of the water treatment supply system 10. Therefore, the same number is attached | subjected to the same structure and description is abbreviate | omitted.

  The membrane filtration device 35 is a device that removes ions in the raw water using a reverse osmosis membrane or a nanofiltration membrane. In this modification, in addition to the first bypass water supply start water level B1 and the second bypass water supply start water level B2 in the above embodiment, a third bypass water supply start water level B3 at a position lower than the second bypass water supply start water level B2 is set. (Not shown).

  When the water level in the water supply tank 5 drops to the first bypass water supply start water level B1, the control circuit 25 opens the on-off valve 20 of the first bypass line 16 that bypasses the deaeration device 11 that is the first water treatment device. Then, the first bypass water supply is started. If the actual water supply is not performed even by the first bypass water supply and the water level in the water supply tank 5 decreases to the second bypass water supply start water level B2, the deaeration device 11 and the membrane filtration device 35 as the second water treatment device are bypassed. The on-off valve 21 of the second bypass line 17 is opened, and the second bypass water supply is started.

  If the actual water supply is not performed by the second bypass water supply and the water level in the water supply tank 5 decreases to the third bypass water supply start water level B3, the deaerator 11, the membrane filter 35, and the soft water device as the third water treatment device The on-off valve 37 of the third bypass line 36 that bypasses 12 is opened, and the third bypass water supply is started.

  Therefore, even in this modified example in which the number of water treatment devices is increased to three, the same operational effects as in the above embodiment can be obtained, and bypass water supply is automatically performed regardless of which of the three water treatment devices is clogged. Therefore, it is possible to prevent the water in the water supply tank from becoming empty.

  As mentioned above, although this embodiment including a modification was described in detail, embodiment of this invention is not limited to the said embodiment, A various deformation | transformation is within the range which does not deviate from the main point of this invention. Is possible.

  For example, the water treatment device installed in the water treatment supply system is not limited to the soft water device, the deaeration device, and the membrane filtration device described above, and can be changed or added as appropriate according to the water-use equipment that supplies water. . For example, an activated carbon filtration device may be installed as a water treatment device. However, when the water use equipment is a steam boiler, it is better to avoid supplying hard water to the steam boiler as much as possible in the water treatment supply system in which multiple water treatment devices are installed on the water supply line. It is desirable to bring a water softener.

  In this specification, on the water supply line, the first water treatment device, the second water treatment device,... Are referred to from the side close to the water supply tank located on the downstream side, and the bypass line is also on the water supply line. In this case, the first bypass line, the second bypass line,... Are referred to from the line that bypasses the downstream side near the water supply tank.

  Further, in this embodiment, it is preferable that the water supply to the water supply tank is stopped and the post-process water-use equipment is stopped completely, rather than supplying untreated water to the water-use equipment. In order to cope with this, a changeover switch for setting to a prohibit mode in which the control circuit does not perform bypass water supply may be provided.

  Moreover, you may comprise so that the forced mode which opens an on-off valve of a bypass line compulsorily and can perform bypass water supply irrespective of the water level in a water supply tank by this changeover switch may be set. In this way, if the water treatment supply system is configured such that the bypass water supply prohibition mode and the bypass water supply forced mode can be selected, flexible water supply control can be performed according to the installation location and situation of the system.

FIG. 1 is a system flow diagram schematically illustrating a water treatment supply system according to the present embodiment. FIG. 2 is a diagram illustrating a set water level at which various processes are performed in the water treatment supply system according to the present embodiment. FIG. 3 is a system flow diagram schematically showing a water treatment supply system according to a modification of the present embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 4 Water supply line 5 Water supply tank 10 Water treatment supply system 11 Deaeration device 12 Soft water device 15 Water level sensor 16, 17 Bypass line 20, 21 On-off valve 25 Control circuit

Claims (5)

In a water treatment and supply system that supplies raw water to a water supply tank of water-using equipment after water treatment,
A water supply line,
A first water treatment device installed on the water supply line;
A second water treatment device installed on the water supply line upstream of the first water treatment device;
A first bypass line connecting the water supply line and the water supply tank between the first water treatment device and the second water treatment device;
A second bypass line connecting the water supply line and the water tank on the upstream side of the second water treatment device;
A water level sensor for measuring the water level in the water supply tank;
When the water level in the water supply tank is lowered to a bypass water supply start water level set at a position lower than a normal water supply start water level by the output of the water level sensor, the first bypass line or the second bypass line is opened, Control means for starting bypass water supply to the water tank;
A water treatment supply system comprising:   The control means opens the first bypass line when the water level in the water supply tank drops to a first bypass water supply start water level set at a position lower than the normal water supply start water level, and the water level in the water supply tank 2. The water treatment according to claim 1, wherein the second bypass line is controlled to be opened when the second bypass water supply start water level is set to a position lower than the first bypass water supply start water level. Supply system.   The control means, after starting the bypass water supply, the bypass water supply stop where the water level in the water supply tank is set to a position lower than the normal water supply start water level and set to a position higher than the bypass water supply start water level The water treatment supply system according to claim 1 or 2, wherein the bypass water supply is controlled to stop when the position returns to the position.   When the water level in the water supply tank is set at a position lower than the normal water supply start water level and falls to a low water level alarm water level set at a position higher than the bypass start water level, the control means issues a low water level alarm. The water treatment supply system according to any one of claims 1 to 3, wherein the water treatment supply system is controlled so as to emit. In a water treatment supply method of supplying raw water to a water supply tank of a water-using device after treating raw water with a plurality of water treatment devices installed on a water supply line,
When the water level in the water supply tank drops to the first bypass water supply start water level set at a position lower than the normal water supply start water level, the first water treatment device closest to the water supply tank is bypassed on the water supply line. A first bypass water supply step for opening the first bypass line to supply water to the water supply tank via the first bypass line;
When the water level in the water supply tank is lowered to the second bypass water supply start water level set at a position lower than the first bypass water supply start water level, the second water treatment device that is second closest to the water supply tank on the water supply line. And a second bypass water supply step of opening the second bypass line to supply water to the water supply tank via a second bypass line that bypasses both of the first water treatment device,
By the first bypass water supply step or the second bypass water supply step, the water level in the water supply tank is set to a position lower than the normal water supply start water level and set to a position higher than the first bypass water supply start water level. When returning to the bypass water supply stop water level, a bypass water supply stop step of closing the first bypass line and the second bypass line and stopping the bypass water supply,
A water treatment supply method comprising:

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