JP2000185276A - Water monitoring member and water monitor apparatus using the same and filter device of water monitoring member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately and quantitatively measure the change of contamination of an industrial water system and an industrial waste water system with the elapse of time on a real time basis and to add a proper amt. of a water treatment chemical agent corresponding to the contamination state thereof to efficiently and economically prevent the trouble caused by the quantity of a contaminant of the water system. SOLUTION: A water monitoring member is equipped with a water injection port 4, a water exit port 5, the cylindrical measuring chamber 6 provided between both ports 4, 5 and having a cross-sectional area larger than that of both ports 4, 5 and having two opposed side walls respectively constituted of mutually parallel transparent flat plates 23, 24, the light emitting part 2 arranged on one side of both side walls, the light detecting part 3 arranged on the other side of them, the inspecting or cleaning window of the interior of the measuring chamber provided to a side wall other than both side walls and the cover member 32 for hemetically sealing the window in a detachable manner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water monitoring member for monitoring the status of pollution of an industrial water system and an industrial wastewater system, and a water monitoring device using the same. More specifically, the present invention relates to, for example, a slime in an industrial water system such as a papermaking process water or various industrial cooling water systems and an industrial wastewater system, and a pollution state caused by a marine organism attached to a part of the water system. The present invention relates to a member for quantitatively monitoring by measuring the transmitted light intensity of a contact member, and to a device for adding a water treatment chemical based on the contamination state to prevent a trouble due to a water-based contaminant.

[0002]

2. Description of the Related Art Water resources are indispensable resources for our lives, and their uses are classified into tap water, industrial water and agricultural water. With the progress of science and technology, depending on the field of use of these waters, the form of use has become complicated and higher quality has been required. In order to secure this high-quality water, we need to understand the pollution status of the water,
Various physical and chemical treatments have been performed based on the results.

[0003] Applications of industrial water, such as steelmaking, petrochemicals, which use a large amount of water as production process water and cooling water,
In various factories such as papermaking, the effective use of water is concentrated or circulated as much as possible to save water. However, these waters cause various adverse effects due to pollution.

[0004] In the water system of the above-mentioned production process, slime caused by propagation of microorganisms frequently occurs. Here, the slime is a viscous massive muddy substance mainly formed by propagation of microorganisms, and is mainly generated in paper pulp manufacturing process water and wastewater. When this slime is generated in a heat exchanger, piping, or the like of a cooling water system in a chemical plant, it adheres to the piping wall surface, lowers cooling efficiency, and sometimes blocks the piping. Further, when slime is generated during the white water process in the paper and pulp mill, the slime separated from the pipe wall surface mixes with the stock, cutting the paper in the paper winding process and interrupting the operation. Furthermore, the contaminated slime forms spots on the paper, reducing the quality of the product.

[0005] On the other hand, in the cooling water system, various obstacles such as corrosion products, slime, algae, and marine organisms caused by water always occur. In particular, water quality is degraded due to concentration and circulation, which is accelerating the occurrence of obstacles caused by water. These obstacles include reduced service life of equipment, blockage and breakage of equipment and piping, energy loss due to reduced thermal efficiency,
Increasing maintenance costs and the like.

Therefore, in order to prevent contaminants such as slime, corrosion products, algae, and marine organisms from adhering to pipes, various water treatment chemicals have been conventionally added. .

In order to confirm whether or not various water treatment chemicals are sufficiently exerting their effects, it is necessary to check the management status such as water quality analysis, chemical concentration analysis, viable cell count measurement, etc. Alternatively, monitoring such as corrosion status check by an electrochemical method (polarization resistance method, AC impedance method, etc.), bypass test for knowing the scale adhesion state of heat exchange, and slime status check by a slime board, etc. have been performed. .

[0008] However, checking the management status such as water quality analysis can be known in a relatively short time, but it is only an indirect method and a guide for judging whether or not an actual failure is prevented. No. Also, the installation of test coupons and slime boards and the bypass test are direct methods, but the monitoring period is as long as about 7 to 30 days, and it is not possible to know the average failure during a specific period, It has been difficult to quickly determine the presence or absence of an obstacle based on environmental changes.

In particular, when a slime control agent is added to an aqueous system for the purpose of preventing slime damage, the effect of the addition of the slime control agent is generally confirmed by collecting the process water before and after the addition of the chemical to the aqueous system. By measuring the number of viable bacteria in the water system and confirming the bactericidal efficacy, or by determining the growth inhibition time and confirming the bacteriostatic efficacy, the timing of adding the appropriate slime control agent known in advance based on experience And a method of selecting and applying the amount of addition thereof.

This method has been widely used as a method for directly grasping and measuring various process waters to accurately grasp the efficacy of the slime control agent at the time of measurement. However, the measurement of the number of viable bacteria and the growth inhibition time requires specific equipment and complicated operations, so that it is difficult to carry out the measurement at the process site. Furthermore, since the measurement time requires a long time of 24 to 50 hours or more, when the result is found, the number of viable bacteria in the process water has already multiplied, or the growth suppression time may fluctuate, Its effectiveness cannot be accurately grasped. Therefore, there is a defect that the immediate and appropriate management of the slime control agent is insufficient, and there is a problem in that, by the time of regular maintenance, a decrease in the flow rate of white water due to contamination of the piping and an operation trouble due to separation of the contamination from the piping occur. .

Therefore, a transparent plate immersed and disposed in the water system, a light emitting unit disposed on one side of the transparent plate, a light receiving unit disposed on the other side, and light is received via the transparent plate. A detecting device equipped with a light quantity measuring means is installed in a water tank in the water system, and the amount of the adhering matter in the water pipe is estimated from the amount of the adhering matter adhering to the transparent plate, and the slime inhibitor is added to the water system. Such a configuration is known (for example, see JP-A-9-2
No. 36546).

However, in such a conventional detection device, since the transparent plate is installed not in the water-based pipe but in the water tank, the speed and pressure of the fluid that comes into contact with the transparent plate are applied to the inner wall of the water-based pipe. It is very different from those of the fluids that come into contact, and it is difficult to estimate the actual amount of adhesion in the water system piping. In addition, there is a problem that when such a detecting device is installed in a water-based pipe, the resistance of the water-based system is caused, which causes a problem.

[0013]

Therefore, the present invention provides
By adding a water treatment agent based on the contamination status of the industrial water system and the industrial wastewater system with high accuracy and quantitative measurement of the contamination status of the industrial wastewater system, and the contamination status of the water system, It is an object to provide a device capable of preventing a failure.

[0014]

Thus, according to the present invention, there are provided a water inlet, a water outlet, and at least two opposing side walls provided between them and having a larger sectional area than the water inlet and the water outlet. Cylindrical measuring chambers each formed of a transparent flat plate parallel to each other, a light emitting unit disposed on one side of the both side walls, a light receiving unit disposed on the other side, and provided on side walls other than the both side walls. A water monitoring member comprising a window for inspection or cleaning in a measurement room, and a cover member for removably sealing the window, and a water monitoring device using the same.

Since the water monitoring member of the present invention has a cylindrical measuring chamber having a water inlet and a drain, this measuring chamber is provided in a water-based bypass pipe or the like, so that the measuring chamber is faithful to the water-based pipe. And it is possible to dynamically and accurately grasp the actual state of adhesion and separation of the deposit on the pipe.

Further, when the monitoring target water supplied to the water monitoring member contains a large amount of substances other than the target substance,
A pre-treatment of pre-filtering so as not to disturb the monitoring is required. Therefore, the present invention
A filter member, liquid supply means for supplying a liquid to be filtered to the filter member by a liquid supply nozzle, and washing means for jetting a part of the liquid filtered by the filter member to the filter member to wash the filter member. To provide a filtration device. In this filter device, even if the cleaning liquid is mixed with the filtered liquid, a part of the filtered liquid is used as the cleaning liquid, so that the filtered liquid is not diluted.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION A measuring chamber provided in a water monitoring member of the present invention is cylindrical and has a cross-sectional area larger than a water injection port and a drain port. This is intended to make the adhesion gradual to increase the adhesion efficiency of the attached matter to the inner wall and to suppress the separation.

The measuring chamber also has at least two opposed chambers.
The two side walls are each formed of a transparent flat plate parallel to each other. This is to minimize energy loss of transmitted light due to refraction or scattering of the side wall when transmitting light through the side wall to the measurement chamber. If the wall surface has a curved surface, the incident light is diffused by the lens effect, and if the wall surface has an uneven surface, the incident light is scattered, and the loss of transmitted light increases.

The material of the transparent flat plate forming the two side walls is not particularly limited as long as it can transmit light and has physical and chemical resistance not to be affected by the target water system. In particular, when the target industrial water system or industrial wastewater system (hereinafter, referred to as an aqueous system) is white water in a papermaking process, inorganic glass, vinyl chloride resin, acrylic resin, and the like are preferable.

The shape of the measuring chamber can be appropriately selected depending on the positional relationship with the water system, the light emitting section for irradiating the measuring chamber with light, and the light receiving section for receiving the transmitted light. The cross section of the measurement chamber may be square, rectangular or polygonal. A circular shape in which only the light transmitting portion is processed into a plane may be used.

The sectional area of the measuring chamber is usually 4 to 10 cm.
^{In 2,} it is preferable that the cross-sectional area of the water injection port and the drain port is about 2 to 5 times, but this is the flow rate of the fluid supplied to the measurement chamber,
The determination is made in consideration of the correlation between the amount of adhesion to the water pipe in the measurement chamber and the like. The length of the measurement chamber is determined in consideration of the arrangement relationship between the light emitting unit and the light receiving unit, and is usually 5 to 10 cm.
It is about. In addition, it is preferable that the dimensions of the water inlet and the drain are determined in consideration of the size of a pipe (for example, a hose) connected thereto and the size of a connector (nipple) thereof.

The measuring chamber has a function of preventing light transmission by contaminants in the system adhering to the inner wall. The water monitoring member of the present invention measures the transmitted light intensity of light transmitted through the measurement chamber. For this reason, it is preferable that the light-emitting unit and the light-receiving unit are provided so as to face a position substantially perpendicular to the side wall made of the transparent flat plate of the measurement chamber. The light emitting portion that can be used in the present invention is, in a wavelength band, infrared, near infrared,
Visible light and ultraviolet light. Ultraviolet rays have a bactericidal action and may disinfect water-based contaminants to be measured, which makes it impossible to perform accurate measurement, which is not preferable.

As the light emitting portion, specifically, an incandescent light bulb such as a general light bulb or a halogen light bulb, a fluorescent lamp such as a bulb-type fluorescent lamp, an HID lamp such as a mercury lamp or a metal halide lamp, a light emitting diode (LED) Semiconductor light emitting devices such as semiconductor lasers, gas lasers such as He-Ne lasers and CO ₂ lasers, liquid lasers, YAG
A solid-state laser such as a laser may be used. Among them, a light emitting diode and a semiconductor laser are preferable in terms of economy. Light emitting diodes are useful for single point illumination. Further, the laser light has a straight traveling property, and a pinhole (for example, 2
mm × 2 mm small hole) or slit (for example, 1 mm ×
A semiconductor laser can be used for both single-point irradiation and wide-area irradiation because it can be condensed or diffused using a known means such as a 30 mm narrow hole. Further, the light from the light source may be transferred using a transfer means such as an optical fiber before irradiation.

The light-receiving unit that can be used in the present invention is not particularly limited as long as it converts light into an electric signal and outputs the electric signal. Specifically, a light-receiving element utilizing a photovoltaic effect, a photoconductive effect, or a photoemission effect, that is, a photodiode, a phototransistor, a pin photodetector, an avalanche photodetector, and the like can be given. Further, the received light may be transferred using a transfer unit such as an optical fiber before being converted into an electric signal. Further, the light source and the light receiving unit may be an optical coupling element (photo interrupter) combining them.

The measurement chamber is provided with a window on a side wall other than the both side walls, and the window is detachably sealed with a cover member. Therefore, it is possible to view the inside of the measurement room through the window,
If the cover member is removed as required, cleaning, collection of attached matter, and the like can be performed. The size of the window is preferably 80% or more of the length of the measurement chamber, and the width is preferably 10% or more of the inner circumference of the measurement chamber in consideration of cleaning of the measurement chamber and collection of extraneous matter. Further, the cover member is preferably transparent. Further, the water monitoring member can be easily provided in a branch pipe or a bypass pipe of a water system pipe. This makes it easy to achieve both the securing of the water system flow path and the monitoring of the pollution status.

The transmitted light intensity obtained as an electric signal by the water monitoring member is recorded as measurement data on a recorder or displayed on a display device to quantitatively grasp the state of contamination of the water system as a decrease in transmitted light intensity. Can be. The change of the water system pollution state and the light transmittance over time is extremely remarkable and characteristic. That is, the light transmittance can be used as an index for accurately and proactively indicating the progress of water-based contamination. More specifically, the light transmittance usually tends to decrease over time due to the attachment of contaminants to the transparent contact member, but if the inclination changes significantly, there is a sign that contamination in the system occurs. Suggest that there is.

However, according to the present invention, it has been confirmed that the change in light transmittance is various and individual, and the relationship between the type of contaminants in the system and the state of contamination and the light transmittance is grasped in advance. It is desirable to keep.

Therefore, according to the present invention, a water monitoring member installed in an industrial water system or an industrial wastewater system via a branch pipe, a storage unit for storing measurement data from a light receiving unit thereof, and a storage unit for storing the measurement data A calculation unit for calculating the measured data,
A water monitoring device including a display unit is provided. The light receiving unit may be a photoelectric conversion element, the storage unit may store the electric signal from the light receiving unit as measurement data, and the operation unit may compare the measurement data with a predetermined value. The light receiving section is
The electric conversion element, the storage unit may store the electric signal from the light receiving unit as measurement data, and the calculation unit may calculate the temporal change rate of the measurement data and compare it with a predetermined value. Further, the storage section may be provided with a removable storage medium for storing the measurement data. In some cases, the water monitoring member, the storage unit, and the display unit may be housed in one housing, and the calculation unit may be provided separately. It is preferable that the display unit displays the measurement data over time.

The water-based contaminants to be prevented by the present invention include slime, marine organisms, and mixtures thereof. According to the present invention, based on the measured contamination state, Treatment agents can be added to prevent damage due to aqueous contaminants. Therefore, according to the present invention, there is provided a water monitoring device that is electrically connected to a chemical addition unit that adds a water treatment agent to the water system and that operates the addition unit based on data processed by the calculation unit. Is done. The water monitoring device may further include a warning unit that issues a warning based on the data processed by the calculation unit.

Next, in the filtering device of the present invention, for example, a plate-shaped or disk-shaped plastic mesh filter can be used as the filtering member. In that case, the fineness of the mesh is determined by the size of the material to be removed by filtration. When filtering paper white water, 40 ~
About 400 mesh is preferable, and 60 to 120 mesh is more preferable. As a result, substances (for example, microorganisms) having a size of 1 to 5 μm pass through, but pulp fibers and other foreign substances are removed, thereby facilitating monitoring by the water monitoring member.

In the case where the filtering member has a flat plate shape or a disk shape, the filtering member has an area sufficiently larger than the cross-sectional area of the liquid supply nozzle so that the liquid discharged from the liquid supply nozzle hits at a substantially right angle. Preferably, it is installed. In this case, if the liquid always hits the same place, the filter member is clogged. Therefore, a moving means for relatively moving (reciprocating) the liquid supply nozzle and the filter member may be further provided. The relative movement between the liquid supply nozzle and the filter member may be such that the liquid supply nozzle reciprocates or swings with respect to the filter member, or such that the filter member reciprocates or rotates with respect to the liquid supply nozzle. It may be something.

The washing means supplies the filtered liquid to the filtering member again to wash the filtering member. As the method, for example, a method in which a substance remaining on the surface of the filtering member is extruded obliquely to the surface of the filtering member and the substance clogged in the filtering member by injecting from the back surface of the filtering member is exposed. , Or a method of performing both at the same time. Therefore, it is preferable to further include a tank for temporarily storing the filtered liquid, and a device for circulating the liquid between the tank, the washing means, and the filtering member. In addition, it is preferable that the cleaning means be supplied to the filtration member while the liquid is supplied by the liquid supply means because the cleaning efficiency is increased.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. This does not limit the present invention.
1 and 2 are a front view and a top view, respectively, showing a water monitoring member of the present invention, and FIG. 3 is a side view of a measurement cell. As shown in these drawings, the measuring cell 1 includes a water inlet 4 and a drain port 5, and a measuring chamber 6 provided between the water inlet 4 and the drain port 5. A light emitting unit 2 and a light receiving unit 3 are provided on both sides of the measurement cell 1, respectively, so that light emitted from the light emitting unit 2 passes through the measurement chamber 6 and is received by the light receiving unit 3.

The measuring cell 1 has the following configuration. 2
21 rectangular transparent plates (100 mm x 62 mm)
Are opposed in parallel, and two rectangular transparent plates (60 m
(m × 30 mm) 23 and 24 are opposed to each other so as to be parallel to each other with an interval of 12 mm, and are adhered vertically to the transparent plates 21 and 22. Also, rectangular parallelepiped blocks (30 mm × 22 mm × 2) in which screw holes having a diameter of 16 mm and a pitch of 1.25 mm are penetrated as the water inlets 4 and 5, respectively.
0 mm) 25 and 26 are bonded between the transparent plates 23 and 24 above and below the transparent side plates 21 and 22.

Further, the transparent plate 21 is provided outside the transparent plate 21.
Silicone rubber packing plate of the same shape as (2mm thick)
31 and the transparent cover plate 32 are overlapped, and four screws 27
To 30 and four nuts 27a to 30a so as to be pressed against each other.

FIG. 4 is a front view of the measuring cell 1 when the transparent cover plate 32 and the packing plate 31 are removed, and the transparent plate 21 has a rectangular window 33 having an area of 60 m × 12 mm at the center. Four holes 27b-30b in transparent plate 21
Are holes for screws 27 to 30 to penetrate. The packing plate 31 also has a window 34 of the same size at a position overlapping the window 33.
(FIGS. 2 and 3). Therefore, the inside of the measurement room 6 can be inspected through the windows 33 and 34 with the transparent cover plate 32 attached. However, when removing or collecting the deposits in the measurement room 6, the transparent cover plate 32 is removed. And packing plate 31
And remove it.

The transparent plate 22 has four through holes 36 to 38.
(Through holes 38 are not shown) are formed, and these holes are used when the measuring cell 1 is installed in a housing or the like.
The transparent plates 21 to 24 and the transparent cover 32 are made of acrylic resin and have a thickness of 5 mm.

The measuring chamber 6 having such a configuration has an internal sectional area of 4.44 cm ² (37 mm × 12 mm) and a length of 6 mm.
cm, and the internal cross-sectional area is about 2.2 times the cross-sectional area (2 cm ² ) of the water inlet 4 and the drain 5. Therefore, the flow velocity of the fluid injected from the water inlet 4 is 6
The speed is reduced to less than half.

The light emitting section 2 has a wavelength of 780 nm and a width of 1
is a laser light source that emits laser light having a cross section of 30 mm in length and 30 mm in length. The laser light is orthogonal to the transparent plate 23 of the measurement cell 1, and the longitudinal direction of the laser light section is in the longitudinal direction of the measurement chamber 6. It is installed to be parallel. The laser light emitted from the light emitting unit 2 passes through the measurement chamber 6 without being refracted by the transparent plates 23 and 24 because the transparent plates 23 and 24 constituting the measurement chamber 6 are transparent plates orthogonal to the laser light. can do. The light receiving section 3 is 30 m long
m, which is installed at a position facing the laser light source of the light emitting unit 2 via the measurement chamber 6.

FIG. 5 is a block diagram showing the configuration of a water monitoring device 50 using the water monitoring member 100 of the present invention.
The water monitoring device 50 includes a monitoring device 200 including the water monitoring member 100 and a signal processing unit 300. The monitor device 200 includes an amplifier 51 that amplifies and outputs an electric signal output from the light receiving unit 3 and a display unit 54 (for example,
A display control unit 52 that incorporates a display memory 53 that stores an output signal from the amplifier 51 as measurement data and displays the measurement data on a display unit 54, and inputs display conditions to the display control unit 52. And a writing unit 55 for writing the output signal of the amplifier 51 as measurement data to a writable / readable storage medium (for example, a memory card or a floppy disk) 56.

The signal processing unit 300 includes a storage unit 57 for storing the output signal of the amplifier 51 as measurement data, and a storage unit 5.
7 for calculating the measurement data stored in the memory 7
And an input unit 61 for inputting calculation conditions and calculation programs to the calculation unit 58, and a display unit 59 for displaying calculation results. The signal processing unit 300 can be constituted by, for example, a personal computer.

The arithmetic section 58 performs, for example, the following arithmetic processing. (1) Compare the measured data with a predetermined value. (2) The temporal change rate of the measurement data is calculated and compared as a predetermined value. (3) Calculate the fluctuation range of the measurement data and compare it with a predetermined value. (4) The temporal change pattern of the measurement data is compared with a predetermined pattern.

In this embodiment, the monitor 20
0 is housed in a housing 121 shown in FIG. 6 (front view). Doors 122 and 123 that can be opened and closed are provided on the upper and lower sides of the front panel of the housing 121.
A display unit 54, a display control unit 52, an amplifier 51, and a writing unit 55 are provided on the upper side inside the storage unit. The storage medium 56 is removably inserted into an insertion opening of the writing unit 55. Note that the input unit 60 for inputting display conditions is configured by a touch panel, and is provided so as to overlap the display unit 54.

On the lower side of the inside of the housing 121, the water monitoring member 100, that is, the measuring cell 1, the light emitting unit 2,
Is installed, and a water injection hose 127 and a water discharge hose 128 are externally connected to the water injection port 4 and the water discharge port 5 of the measurement cell 1 via hose connection nipples 129 and 130, respectively. The measuring cell 1 has a through hole 3
5 to 38 (FIGS. 2 and 3), the screws are screwed inside the housing 121, so that they can be replaced as needed.

The doors 122 and 123 can be opened and closed by operating the handles 125 and 126, respectively, and are used for maintenance and inspection of the inside of the housing 212. Further, the door 122 is provided with a window 124 so that the display unit 54 can be seen from outside without opening the door 122.

FIG. 7 is a schematic view of a papermaking white water circulation system of a papermaking machine provided with the water monitoring device 50 of the present invention. In this papermaking white water circulation system, white water is sent from a white water silo 10 to an inlet 12 by a pump 11, and about 4% by weight of pulp sent from a machine chest 13 through a head box 14 is transferred by the pump 11. And is diluted and diffused to about 0.8% by weight, and extruded from the inlet 12 to the wire portion 15. Further, the white water that has passed through the wire section 15 passes through the white water silo 10 and the pump 1
It is refluxed as dilution water by 1 (in the figure, the flow of white water is indicated by an arrow).

The piping before the pulp from the head box 14 flows downstream of the white water silo 10 includes a branch pipe 16.
Are connected by a bypass, and a water monitoring member 100 of a water monitoring device 50 is interposed in the branch pipe 16. That is, the water monitoring member 100 is connected to the middle of the branch pipe 16 via the hoses 127 and 128 (FIG. 6). Water monitoring member 100
Before and after, valves 18a and 18b are provided which can be opened and closed and arbitrarily set the flow velocity in the water monitoring member 100.

The inlet 12 is provided with a tank 19 and a pump 20 for supplying a medicine as a water treatment medicine addition section.
Is connected. The pump 20 includes a pump driving unit 2
0a, the pump drive unit 20a is electrically connected to the calculation unit 58 of the water monitoring device 50, thereby automatically controlling the amount of the drug added. .

Next, the operation procedure of the water monitoring device 50 will be described. First, the papermaking machine including the papermaking white water circulation system shown in FIG.
The white water circulates in the measurement cell 1 of 00, but the light emitting unit 2 and the light receiving unit 3 are not operated) for a predetermined period (for example, 7
Days), the attached matter adhering to the wall surface of the measuring chamber 6 of the measuring cell 1 was collected through the window 33 during the operation, and bacteria, inorganic components, and organic components contained in the attached matter were analyzed. Determine a suitable water treatment agent.

Next, the papermaking white water circulation system is cleaned by circulating a cleaning agent (including the measuring cell 1). Then, the determined water treatment agent is charged into the tank 19, and the operation of the papermaking machine is started again. When the white water starts to circulate in the measurement chamber 6 after the start of the operation, the water monitoring device 50 is calibrated immediately. That is,
At this time (when the measurement chamber 6 is not contaminated), the display unit 54 displays 100% of the transmitted light intensity received by the light receiving unit 3.
Is displayed, and the display control unit 54 is controlled via the input unit 60 so that the display unit 54 displays 0% when the light to the light receiving unit 3 is blocked.
Calibrate. The operation unit 58 is connected to the pump 2 via the input unit 61.
An operation condition of 0 is set, and the arithmetic unit 58 repeatedly drives the pump 20 at a constant cycle (for example, 8 hours) and for a fixed time (for example, 30 minutes) regardless of the output of the light receiving unit 3.

FIG. 8 shows an example of a change with time of the transmitted light intensity displayed on the display unit 54 at this time. The transmitted light intensity starts to decrease from the end of the second day, and varies from the end of the second day to the end of the fifth day with a maximum fluctuation width of 40%, and the average value is 75.
%, And rapidly drops to 25% from the beginning of the sixth day to the beginning of the seventh day, and the state is maintained until the middle of the eighth day. In the middle of the eighth day, one papermaking process was completed, the papermaking machine was stopped, and the papermaking white water circulation system was washed, so that the transmitted light intensity was restored to 100%.

This operation is repeated for each papermaking process, and a large number of obtained measurement data are accumulated in the storage medium 56, and the accumulated measurement data is analyzed to maintain the transmitted light intensity at a predetermined value or more (for example, 50% or more). For example, (1) the driving cycle is shortened when the transmitted light intensity is equal to or less than a predetermined value, and (2) the driving cycle is shortened when the temporal change rate of the transmitted light intensity is equal to or more than a predetermined value. (3) When the variation width of the transmitted light intensity is equal to or more than a predetermined value, the driving cycle is shortened. (4) When the temporal change pattern of the transmitted light intensity is different from the predetermined pattern, the driving cycle is shortened.

The driving conditions of the pump 20 are input to the input unit 6.
1 to the arithmetic unit 58. Thereafter, the arithmetic unit 58 automatically adds an appropriate amount of the water treatment chemical to the pump 20 based on the measurement data (transmitted light intensity) obtained from the light receiving unit 3. Note that, in the automatic operation, if the transmitted light amount is excessively reduced, the arithmetic unit 58 informs the display unit 5 of that fact.
A warning is displayed on the display.

Next, in the papermaking white water circulation system shown in FIG. 7, when the white water contains a large amount of pulp fibers and has a high turbidity and is difficult to monitor by the water monitoring member 100,
A filtration device for filtering white water supplied to the filter in advance will be described.

In the embodiment shown in FIG. 9, the white water in the branch pipe 16 (FIG. 7) is guided in the direction of arrow A via the valve 18a and stored in the raw water tank 62. The white water in the raw water tank 62 is injected by a pump 63 to a flat filtering member 65 via a liquid supply nozzle 64. The white water filtered by the filtering member 65 is stored in a treated water tank 66.

The white water in the treated water tank 66 is supplied by the pump 67 to the water monitoring member 100 via the hose 127. White water discharged from the water monitoring member 100 is stored in the drainage tank 68 via a hose 128. When the water level in the drain tank 68 increases and is detected by the water level sensor 69, the pump 70
Operates to guide the white water in the discharge tank 68 through the valve 18b in the direction of arrow B and return it to the branch pipe 16 (FIG. 7).

The liquid supply nozzle 64 is supported by a shaft 71 substantially above the center of the filtration member 65. The shaft 71 makes a reciprocating motion with a period of about 1 second at a frequency of several cm in a direction perpendicular to the paper surface by a motor (not shown).

On the other hand, when the water level in the treated water tank 66 increases, the white water in the treated water tank 66 is supplied to and stored in the auxiliary tank 73 via the hose 72. During the liquid supply from the supply nozzle 64, the water level in the auxiliary tank 73 increases and the water level sensor 74
, The pump 75 operates to inject white water in the auxiliary tank 73 to the filter member 65 via the first cleaning nozzle 76 and the second cleaning nozzle 77.

The first cleaning nozzle 76 sprays from the upper surface of the filtering member 65 obliquely, and the second cleaning nozzle 77 sprays from the lower surface of the filtering member 65. The filtering member 65 is installed in the treated water tank 66 so as to be detachable at an angle of 15 to 30 degrees with respect to the horizontal direction. Therefore, when the substances (pulp fibers, foreign matter, etc.) remaining on the filtration member 65 are pushed out by the ejection of the second nozzle 77, they are flown along the inclination of the filtration member 65 by the ejection of the first cleaning nozzle 76, and the treated water is discharged. Tank 6
6 is discharged to a discharge tank 68 via a hose 78 provided at an opening in the side wall of the sixth. Further, when the white water is likely to overflow from the raw water tank 62, the white water is discharged to the drain tank 68 via the hose 79, which is prevented.

As described above, the white water supplied to the water monitoring member 100 is filtered in advance by the filtering member 65, so that the water monitoring member 100 can sufficiently exhibit its original function. The filter member 65 of this embodiment uses a plastic 80 mesh twill filter.

FIG. 10 shows a modification of the embodiment shown in FIG. In FIG. 10, the white water in the branch pipe 16 (FIG. 7) is guided in the direction of arrow A via the valve 18a, and is supplied to the raw water tank 62.
Stored in The white water in the raw water tank 62 is injected by a pump 63 to a disk-shaped filter member 65a via a liquid supply nozzle 64a.

The white water filtered by the filtering member 65a is stored in a cylindrical treated water tank 66a. Treated water tank 66
The white water a is supplied to the water monitoring member 100 via the hose 127 by the pump 67. The white water that has come out of the water monitoring member 100 is guided to the treated water tank 66a via the hose 128, and is jetted onto the upper surface of the filtration member 65a via the third cleaning nozzle 76a.

During the liquid supply from the liquid supply nozzle 64a, the white water in the treated water tank 66a is guided to the fourth cleaning nozzle 77a by the pump 75a, and is jetted to the back surface of the filter member 65a. The substance remaining in the filter member 65a is caused to flow by the injection of the third and fourth cleaning nozzles 76a and 77a as in the embodiment of FIG. 9, and is discharged through a hose 78 connected to the opening of the side wall of the treated water tank 66a. It is discharged to the tank 68.

When the amount of white water in the treated water tank 66a becomes equal to or higher than a predetermined water level, the white water is discharged to a drain tank 68 via a hose 72a. When the white water in the raw water tank 62 is about to overflow, the white water is discharged to the drain tank 68 via the hose 79. When the water level in the discharge tank 68 increases and is detected by the water level sensor 69, the pump 7
0 operates to guide the white water in the drainage tank 68 in the direction of arrow B via the valve 18b and return it to the branch pipe 16 (FIG. 7).

A motor 80 is provided at the center of the upper lid 82 of the treated water tank 66a, and its output shaft 81 projects coaxially with the center axis of the treated water tank 66a. And
The disc-shaped filtering member 65a is detachably fixed to the tip of the output shaft 81, and is rotated by the motor 80 at 30 to 50 rpm. The treated water tank 66a is moved so that the residual substance on the filtering member 65a moves toward the hose 78 by gravity.
Is installed with its central axis inclined at 15 to 30 degrees with respect to the direction of gravity. In this way, by filtering the white water in advance, the water monitoring member 100 can sufficiently exhibit its function.

[0066]

According to the present invention, it is possible to accurately and quantitatively measure the change over time in the contamination of an industrial water system and an industrial wastewater system with high accuracy in real time. In addition, since an appropriate amount of the water treatment chemical can be added according to the state of contamination, it is possible to efficiently and economically prevent obstacles due to the amount of contaminants in the water system.

[Brief description of the drawings]

FIG. 1 is a front view showing a water monitoring member of the present invention.

FIG. 2 is a top view showing a water monitoring member of the present invention.

FIG. 3 is a side view showing a measuring cell member of the present invention.

FIG. 4 is an explanatory view of a main part of a measuring cell member of the present invention.

FIG. 5 is a block diagram showing a configuration of a water monitoring device of the present invention.

FIG. 6 is a front view of the monitor device of the present invention.

FIG. 7 is a system diagram of a papermaking machine using the water monitoring device of the present invention.

FIG. 8 is an explanatory diagram showing an example of measurement data displayed by the water monitoring device of the present invention.

FIG. 9 is a configuration explanatory view showing an embodiment of the filtration device of the present invention.

FIG. 10 is a configuration explanatory view showing a modified example of the filtration device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Measurement cell 2 Light-emitting part 3 Light-receiving part 4 Water inlet 5 Drain port 6 Measurement chamber 21 Transparent plate 22 Transparent plate 23 Transparent plate 24 Transparent plate 25 Block 26 Block 27 Screw 27a Nut 28 Screw 28a Nut 29 Screw 29a Nut 30 Screw 30a Nut 31 packing plate 32 transparent cover plate 33 window

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C02F 1/50 530 C02F 1/50 530 550 550L G01N 21/05 G01N 21/05 21/59 21/59 Z 33/18 33/18 FF term (reference) 2G057 AA01 AB02 AC01 BA01 BB01 BB06 BC05 DC07 JA02 2G059 AA05 BB05 CC12 EE01 GG01 GG02 HH01 KK01 MM09 MM10 NN07 PP01

Claims (16)

[Claims] 1. A cylindrical shape comprising a water inlet, a water outlet, and a transparent flat plate provided between them and having at least two opposing side walls having a cross-sectional area larger than the water inlet and the water outlet and having at least two opposing side walls parallel to each other. The measurement room, a light emitting unit disposed on one side of the both side walls, a light receiving unit disposed on the other side, a measurement room inspection or cleaning window provided on a side wall other than the both side walls, A water monitoring member comprising: a cover member for detachably sealing a window. 2. The water monitoring member according to claim 1, wherein the light source unit comprises a laser light source, and the light receiving unit comprises a photoelectric conversion element. 3. The water monitoring member according to claim 1, which is installed in an industrial water system or an industrial wastewater system via a branch pipe, a storage unit for storing measurement data from a light receiving unit thereof, and a storage unit for storing the measurement data. A water monitoring device comprising a calculation unit for calculating measured data and a display unit. 4. The light receiving section is an optical-electrical conversion element, and the storage section stores an electric signal from the light receiving section as measurement data,
The water monitoring device according to claim 3, wherein the calculation unit compares the measured data with a predetermined value. 5. A light receiving unit is a light-to-electric conversion element, a storage unit stores an electric signal from the light receiving unit as measurement data, and a calculation unit calculates a temporal change rate of the measurement data, and 4. The water monitoring device according to claim 3, wherein the value is compared with a value. 6. An apparatus according to claim 3, wherein said adding section is electrically connected to a chemical adding section for adding a water treatment agent to said aqueous system, and said adding section is operated based on data processed by a calculating section.
A water monitoring device as described. 7. The water monitoring device according to claim 3, wherein the storage unit is provided with a removable storage medium for storing the measurement data. 8. The water monitoring device according to claim 3, further comprising a housing for housing the water monitoring member, the storage unit, and the display unit, wherein the water monitoring member is exchangeably mounted on the housing. 9. The water monitoring device according to claim 3, wherein the display unit displays the measurement data over time. 10. The apparatus according to claim 3, further comprising a warning unit for issuing a warning based on the data processed by the calculation unit.
A water monitoring device as described. 11. A filtration member, a liquid supply means for supplying a liquid to be filtered to the filtration member by a liquid supply nozzle, and a part of the liquid filtered by the filtration member is jetted to the filtration member to wash the filtration member. A filtering device provided with a washing means. 12. The filtering device according to claim 11, wherein the washing means supplies the liquid to the filtering member while the liquid is supplied from the liquid supplying means. 13. The filtering device according to claim 11, further comprising a moving means for relatively moving the filtering member and the liquid supply nozzle. 14. The filtering device according to claim 13, wherein the filtering member is a flat plate, and the moving means is means for reciprocating the liquid supply nozzle in parallel with the filtering member. 15. The filtration device according to claim 13, wherein the filtration member is disk-shaped, and the moving means is means for rotating the filtration member with respect to the liquid supply nozzle. 16. The filtering device according to claim 11, further comprising a tank for storing the filtered liquid, and a circulating means for circulating the liquid between the tank, the washing means, and the filtering member.