JP2888686B2 - Liquid processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow control device for a liquid processing device such as a filtration device, a pure water production device, a hard water softening device, and a special liquid refining device. The present invention relates to a flow rate control device for controlling a flow rate in each of the steps, including a regeneration processing step including a plurality of steps performed in order to recover the liquid processing capacity of the apparatus.

[0002]

2. Description of the Related Art A plurality of towers filled with an ion exchange resin, such as a pure water production apparatus and a desalination apparatus, are used to collect water from a tower having a reduced treatment capacity. In order to recover the processing ability of the player, the reproduction processing is executed. Although there are some differences in the piping system depending on the type of the tower, for example, the piping system diagram of the cation exchange resin tower in which the regenerating process in the two-bed three-column type pure water production apparatus is an upward flow is shown in FIG. Table 1 shows a process chart showing opening and closing of various valves for switching a series of processes of the entire apparatus including a water treatment process and a regeneration process including a plurality of processes. Operation control such as switching of various valves is managed by a control device including a sequencer and the like based on conditions such as time, water level, integrated flow rate, and conductivity. Note that, in Table 1, the solid black indicates that the valve is open.

In FIG. 3, K is a column filled with a cation exchange resin as a filler Ka, for example.
The first pipeline 1 (main flow path) and the second pipeline 3 and the third pipeline 3 (backflow flow path) corresponding to the vertical position of the filling position of the filler Ka are provided above the filling position of the above. A fourth conduit 4 (outlet passage) is provided at the bottom of the tower K. The first pipe 1 has a valve K1 for supplying raw water for a water sampling process.
A first flow meter FI-1 is provided, and a branch line 1A for cation exchange resin packed bed pressurized water and a branch line 1B for backwash drainage are provided on the way. 1A is provided with a valve K8 and a second flow meter FI-2.
B is provided with a valve K2.

[0004] The second pipe 2 is provided with a branch pipe 2A for regenerating waste liquid, and is provided with a valve K41. Further, the second pipe line 2 is provided with a first backwash valve K31,
It is connected to the fourth conduit 4 via a second backwash valve K32. On the other hand, the first pipeline 1 and the second pipeline 2
The connection between the valve K1 and the first flow meter FI-1 and the connection between the valve K31 and the valve 32 via the backwash pipe 5 are provided.

The third pipe 3 is provided with a valve K62, an ejector E, a valve K61, and a third flow meter FI-3, and the ejector E is provided with a drug passage 6.

[0006] A hydrochloric acid measuring tank 7 for measuring a fixed amount of a regenerative drug, for example, hydrochloric acid, by a level sensor LS is connected to the drug delivery pipe line 6. Hydrochloric acid is supplied from a hydrochloric acid storage tank 8. In addition, drug passage 6
Is provided with a valve K7 and a main valve K7 '.

[0007] The fourth pipe 4 has a pipe 9 for washing and drainage,
The treated water outflow pipe 10 is connected, the above-mentioned second backwashing pipe is connected, and the washing / draining pipe 9 is provided with a valve K42. Has a valve K
5 are provided.

The conventional cation exchange resin tower thus constructed operates according to the opening and closing of the valves and the flow rate control shown in Table 1.

[0009]

[Table 1]

Here, the flow rate in each step shown in Table 1 differs depending on the purpose and properties of the step and the like. Therefore, the valves for forming the respective flow paths in each step are automatic valves having a valve opening setting mechanism. The flow rate is set by opening and closing the automatic valve in a state where the valve opening is adjusted, and the set flow rate is measured using flow meters FI-1, FI-2, and FI-3. .

First, in the water sampling step, the valves K1 and K5 are opened, and the raw water flows through the first pipe 1 in a downward flow from the top of the tower K, and is subjected to ion exchange treatment with the filler Ka. , The fourth line 4 and the treated water outflow line 10. At this time, the flow rate of the treated water is set by the valve K on the outlet side.
5 is performed.

The water sampling process is controlled by a timer, an integrated flow rate, the conductivity of the treated water of an anion exchange resin tower installed at a later stage, and the like, and when a predetermined water passage time elapses or the treated water volume reaches a constant volume. Or the treated water quality deteriorates, the valve K1
And the valve K5 are closed to switch to the backwashing-1 step.

In the backwashing-1 step, the valve K2 is opened to discharge the backwash wastewater to the outside of the tower, and the valve K31 is opened to flow raw water into the tower K from the upper collector Kb in an upward flow. And
The deposit in the upper layer of the packing material Ka is discharged out of the tower.
At this time, the flow rate of the supplied raw water is set by a valve K31. When this backwashing-1 step has passed for a predetermined time, the valve K31
Is closed, and the process is switched to the backwashing-2 step.

In the backwashing-2 step, the valve K32 is opened, the raw water flows into the tower K from the bottom of the tower K ascending through the fourth pipe, and the packing material compressed during the water sampling step is removed. Relax Ka. At this time, the flow rate of the raw water for the backwashing-2 step to be supplied is set by the valve K32. After a predetermined time has passed in the backwashing-2 step, the valves K2 and K32 are closed, and a settling step of setting the filler Ka loosened in the backwashing-2 step is performed for a predetermined time, and then the compression blow is performed. Switch to process.

In the compression blow step, the valve K1 is opened, raw water is passed through the first pipe 1 from the upper part of the tower K in a downward flow, and the valve K42 is opened to discharge the effluent from the tower K. Is discharged from the bottom of the column, and the filler Ka made of a cation exchange resin is compressed in preparation for a chemical passing step to be performed later. that time,
The flow rate for obtaining a predetermined compressibility is set by the valve K42.

After a predetermined time has elapsed in the compression blow step, the valves K1 and K42 are closed to switch to the collector blow step. In the collector blow step, the valve K8 is opened to allow the raw water to flow in from the upper part of the tower K, and the valve K41 is opened to flow out of the tower through the upper collector Kb to prepare for a later drug passing step. Then, the upper part of the filler Ka is further compressed. At this time, the flow rate for obtaining the predetermined compressibility is determined by the valve K
41 is set. After a lapse of a predetermined time in the collector blow step, the valves K8 and K41 are left open, and the operation is switched to the medicine passing step. The drug passing process is performed using valves K61 and K
At the same time as opening the valve 62, the valve K7 (the main valve K7 'is normally open) is opened, the hydrochloric acid ejector E is driven by the raw water to suck and dilute the hydrochloric acid from the hydrochloric acid measuring tank 7, and the distributor Kc The resin is dispersed and passed through the filler Ka in an upward flow to regenerate the cation exchange resin. The flow rate in the drug passing process is set by valves K61, K7, K8.

The drug passing step is controlled by a level sensor LS attached to the hydrochloric acid measuring tank 7, and when a predetermined hydrochloric acid capacity is sucked, only the valve K7 is closed to stop the supply of hydrochloric acid and to switch to the extrusion step. Be replaced. In the extrusion step, the hydrochloric acid remaining in the pipe and the ion exchange resin as the filler is continuously extruded by the regeneration water from the ejector E, and the effluent is discharged from the upper collector Kb. The flow rate of the extrusion process is
It is set by valves K61 and K8. After a predetermined time has elapsed in the extrusion process, the valves K41, K61, K62, and K8 are closed, and the process is switched to the cleaning process.

In the washing step, the valves K1 and K42 are opened, and the raw water flows downward from the upper part of the tower K to wash away excess hydrochloric acid remaining in the filler Ka. The flow rate at that time is the valve K4
Set by 2. On the other hand, during this cleaning step, the valve H1 is opened to supply a predetermined amount of hydrochloric acid from the hydrochloric acid storage tank 8 into the hydrochloric acid measuring tank 7 (controlled by the level sensor LS) so as to prepare for the next regeneration step. . After a lapse of a predetermined time in the washing step, all the valves are closed to enter the pause step, or the water sampling step is started without entering the pause step.

[0019]

By the way, in the conventional liquid processing apparatus, various valves have their valve opening degrees set in advance. In the resin tower, although the raw water is supplied from the upper part of the tower K in both the compression blow step and the collector blow step, the flow rates thereof are different, so the branch pipe 1A is provided separately from the first pipe 1. , A valve K8 is provided there.

Further, when supplying a predetermined amount of hydrochloric acid by an ejector in the drug passing process, a hydrochloric acid measuring tank 7 having a level sensor LS is required to measure a predetermined volume of hydrochloric acid.

As described above, in the conventional liquid processing apparatus, the flow rate is set by the opening of the automatic valve. Therefore, even when the same type of liquid is supplied into the tower through the same pipe, the operation steps are different. Due to the difference in flow rate caused by this, an extra branch line is required, and it is necessary to provide an automatic valve for further setting the flow rate in the branch line,
There are problems that the equipment becomes complicated and the number of automatic valves increases.

Further, in a liquid processing apparatus, when a remodeling involving a change in the flow rate of each process is performed, a troublesome operation of re-adjusting the flow rate setting of the valve is required.

It is an object of the present invention, as well as to simplify the pipe line, can minimize the number of automatic valves for flow rate setting, also possible to change the processing steps involving a change of the flow amount is very easily, Further, the present invention provides a liquid processing apparatus capable of reducing the number of devices in the entire apparatus.

[0024]

A specific configuration of a liquid processing apparatus for realizing the object of the present invention includes a processing tower filled with a filler having a liquid processing function, and a processing tower provided for the processing tower. A plurality of piping systems, valves provided in these piping systems, control means for forming different flow paths respectively corresponding to a plurality of steps including a liquid processing step by selective opening and closing control of these valves, A flow detecting means and a flow controlling means provided on an inlet side or a drain side piping system of a common piping system for the supply liquid in the plurality of flow paths, wherein the controlling unit includes flow rate information from the flow detecting unit; And controlling the flow rate control means so as to obtain a flow rate corresponding to each step input to the control means in advance based on the flow rate.

[0025]

In the liquid processing apparatus having the above-described structure, the valve provided in the piping system for forming the flow path only needs to have a function of simply opening and closing. The control means controls the flow rate control means based on the flow rate information from the flow rate detection means so that the flow rate is inputted in advance for each process.

[0026]

1 shows a liquid processing apparatus according to the present invention.
It is a piping system diagram which shows one Example applied to the cation exchange resin tower of the upflow reproduction | regeneration system of the three-bed type pure water production apparatus. The apparatus of this embodiment is the same type of apparatus as the conventional example shown in FIG. 3, and the pipes and members having the same functions are denoted by the same reference numerals. Although the same reference numerals are given to those performing the above, structurally, it is not necessary to have a valve opening degree setting mechanism.

In this embodiment, the first pipe 1 is connected to the tower K.
(Main flow path), 2nd pipeline 2, 3rd pipeline 3 (backflow channel)
And a fourth pipe 4 (outlet flow path), and is similar to the conventional example shown in FIG. 3 in that the first pipe 1 has a valve K1. On the inlet side of the valve K1, a flow meter FIC-1 as first flow detecting means and a flow control valve CV1 as first flow controlling means are provided, and are instructed by the control device 20 shown in FIG. The flow rate is controlled by the flow meter FIC-1 and the flow rate control valve CV1 so as to supply the raw water at the adjusted flow rate.

In addition, with respect to the first pipe 1, between the valve K1 and the flow meter FIC-1, the inlet side of the valve K31 and the valve K
32 are connected to the inlet side, respectively, so that the raw water from the first pipeline 1 can be supplied to the tower K via the valve K31 or via the valve K32. On the other hand, a drug passage 11 is piped from the hydrochloric acid storage tank 8 to the ejector E, and a flow meter FIC-2 as second flow detecting means and a flow control valve CV2 as second flow controlling means are provided on the way. It is and, by shown <br/> to the controller 20 in FIG. 2, is controlled so that the flow rate control valve CV2 becomes a predetermined flow rate.

The control device 20 shown in FIG. 2 comprises a sequencer 21 comprising a programmable controller, a power supply unit 2
2 and a transmission / reception unit 23. The sequencer 21 includes, in the order of each step shown in Table 2 below, valves K1, K2, K31, K32, K41, K42, and K42 in each step.
5, the opening and closing of K61, K62 and the flow rate required for each step are input in advance, and the first flow meter FI
The first flow control valve CV1 is feedback-controlled so that the flow rate measured in C-1 becomes the flow rate set for each process. Similarly, in the drug passing process, the hydrochloric acid in the hydrochloric acid storage tank 8 is feedback-controlled by the second flow meter FIC-2 and the second flow control valve CV2 so as to have a predetermined flow rate.

The first flow meter FIC-1 and the second flow meter FIC-2 are driven by, for example, power supply of 100 V from the power supply unit 22 and transmit measurement signals to the transmission / reception unit 23. The sequencer 21 controls the flow rate control valve CV1 and the flow rate control valve CV2 via the transmission / reception unit 23 so that the flow rate becomes a preset flow required in the current process.
Control.

With the control device having the above configuration, the liquid processing apparatus of the present embodiment performs the operations shown in Table 2.

[0032]

[Table 2]

In the present embodiment, the water sampling step, backwash-1 step, backwash-2 step, compression blow step, collector blow step, chemical feed step, extrusion step, and washing step are all performed from the first pipe 1. Raw water or regeneration water is used. The flow rates of the raw water and regeneration water required in these steps are input to the sequencer 21 in advance, respectively.
The flow rate is controlled by the C-1 and the flow control valve CV1 so that a predetermined flow rate is obtained in each step.

Accordingly, since the flow rate can be controlled by the flow meter FIC-1 and the flow control valve CV1, in the water sampling process, it has conventionally been necessary to set the valve opening of the valve K5.
The valve K5 only needs to have a function of simply opening and closing.

Also, the valves K31 and K32 for switching between the backwashing one step and the backwashing two step do not need to set the valve opening degree as in the prior art, and need only be opened and closed in order to simply form a flow path. You just have to

Next, from the compression blow step to the washing step, raw water is conventionally passed from the top of the tower K using the valves K1 and K8, but according to the present invention, all of these continuous steps are performed. it is sufficient simply to open the valve K1 in the medium, it is possible to reduce the number of opening and closing operation of the valve, and for the valve K41, K42 for discharging the regeneration effluent and washing waste water to be in an open have your these steps Also, the valve need not have a flow rate setting mechanism as in the related art, but may be any valve having an opening / closing function.

As described above, in the present embodiment, unlike the prior art, in particular, the branch pipe 1B is provided in the first pipe 1 and the valve K8 with the valve opening setting mechanism is not provided, and the collector blow step is performed. , A medicine passing step and an extrusion step.

The flow rate and time of each step are controlled by the control unit 20.
These values can be freely changed, and by having an arithmetic function, management of the integrated flow rate and the like can be easily performed.

Further, since the flow rate can be gradually increased at the time of switching the process, the water hammer phenomenon can be reduced at the time of switching between various processes such as a water sampling process and a compression blow process. In the backwash process, it is possible to reduce gradually becomes close the flow rate at the end of the process, for example when the present invention is applied to a mixed bed water purification equipment, the separation surface of the Yin amphoteric ion-exchange resin Can be planarized.

On the other hand, in the drug passing step, the third conduit 3
The valve K61 provided in the valve is opened to dilute the hydrochloric acid with the ejector driving water to pass the medicine into the tower K.
1 is controlled at a predetermined flow rate by a flow meter FIC-2 and a flow control valve CV2 to be diluted at an optimum ratio, so that a hydrochloric acid measuring tank having a level sensor or a valve K7 as in the related art is used. And the like can be eliminated, and the equipment can be simplified.

In addition, a change in the regeneration level (used amount of the regenerated chemical) due to a change in the quality of the raw water or the like (conventionally, when the used amount of the regenerated chemical is changed, the setting of the level sensor is changed, which is complicated. In the case of using the above amount, it is necessary to change the measuring tank itself), and the control of the drug passing process can be changed from a conventional level sensor to a timer.

[0042] Incidentally, the third conduit 3 is passed through the reproducing YoHara water, but the raw water though as in the first conduit 1 is in passing drugs process trying water flow, passing agents step First in
Because the raw water also flows through the pipeline 1, the flow control using feedback control by the flow meter FIC- 1 and the flow control valve CV 1 cannot be performed, and the third pipeline 3
Uses only a medicine passing process, and therefore, a valve K61 having a valve opening degree setting mechanism is used as in the related art.

Although the flow meter and the flow control valve are provided in the raw water supply side and the chemical injection side piping system with respect to the tower K in the above-described embodiment, they may be provided in the drain side instead. .

[0044]

As described above, according to the present invention,
A valve for forming a plurality of flow paths may have an opening / closing control function merely for forming a flow path, and even when performing a process of switching a valve and performing a different liquid flow rate to be sequentially supplied, For example, on the inlet side of the piping system that forms the main pipe of the liquid supply flow path, the flow rate required in each step can be controlled, so that the piping system is simplified and valves with many valve opening setting mechanisms are not required. In addition, troublesome flow resetting work after maintenance work such as repair and remodeling is not required.

Further, the formation of each flow path and the setting of the flow rate passed through the flow path are not performed by a valve having a valve opening setting mechanism as in the prior art, and the flow rate is controlled by feedback control. because it is, increasing gradually the flow rate at the start of the process pressure
Or is, or becomes close to the end of the process when it is possible or gradually decreasing the flow rate, the filling is filled into the processing column material, for example, can also reduce the turbulence of the ion exchange resin, further steps cutting The water hammer effect at the time of replacement can also be reduced.

[0046] Further, when diluted with the reproduction agents e.g. ejector driving liquid, for the supply flow rate of the concentrated regeneration agent agent, an appropriate amount of regeneration agent can be Tsuyaku by feedback control, providing the conventional measuring tank as This eliminates the need and simplifies the equipment.

[Brief description of the drawings]

FIG. 1 is a piping diagram showing an embodiment of a liquid processing apparatus according to the present invention.

FIG. 2 is a block diagram of a control device of the processing device of FIG. 1;

FIG. 3 is a piping diagram of a conventional liquid processing apparatus.

[Explanation of symbols]

1, 2, 3, 4, 9, 10, 11 ... line 8 ... hydrochloric acid storage tank K ... tower K1, 2, 5, 7, 8, 31, 32, 41, 42, 6
1, 61 ... valve H1 ... valve FIC-1, FIC-2 ... flow meter CV1, CV2 ... flow control valve

Claims (4)

(57) [Claims] 1. A processing tower filled with a member having a liquid processing function as a filler, a plurality of piping systems provided for the processing tower, valves provided in these piping systems, and selection of these valves. Control means for forming different flow paths respectively corresponding to a plurality of steps including a liquid processing step by means of open / close control,
A flow detecting means and a flow controlling means provided on an inlet side or a drain side piping system of a common piping system for the supply liquid in the plurality of flow paths, wherein the controlling unit includes flow rate information from the flow detecting unit; A liquid processing apparatus characterized in that the flow rate control means is controlled so as to obtain a flow rate corresponding to each step input to the control means in advance based on the flow rate. 2. A common flow path for supply liquid formed by control of opening and closing of a valve by a control means according to claim 1.
A main flow path corresponding to a liquid processing step for discharging the liquid to be processed through a filler in the processing tower to a processing liquid discharge piping system outside the tower, and a main flow corresponding to the main flow with respect to the filler in the processing tower. At least a reverse flow path for discharging the liquid to the outside of the tower through a direction opposite to the flow direction of the passage, and an outlet flow path for discharging the liquid to be processed to the outside of the tower through the packing material in the processing tower. A liquid processing apparatus characterized by being processed. 3. A drug delivery pipe system for regenerating a filler filled in a treatment tower by passing a regenerative drug therethrough, and a regenerating drug storage tank connected to the drug delivery pipe system. Having a flow rate detection means and a flow rate control means provided in the drug delivery piping system, the control means based on the flow rate information from the flow rate detection means so that the flow rate is inputted in advance to the control means. A liquid processing apparatus for controlling said flow rate control means. 4. The liquid processing apparatus according to claim 3, wherein the regenerating agent is diluted by an ejector driving liquid.