JP2002116147A - Apparatus and method for measuring contamination of water system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contamination measuring apparatus capable of measuring directly and in real time the amount of slime adhesion. SOLUTION: A contamination measuring portion 2 is provided in a water pipe 7 through which white water A or clear water B flows. At the contamination measuring portion 2, a laser beam irradiation device 4 and a laser beam receiver 5 are provided as a pair across the water passage 32 of a measurement water box 3 and on adhesion plates 6 through which laser beams can pass. The inner wall of the adhesion plate 6 faces the water passage 32 and serves as a slime adhesion portion 63 to which contaminants in the white water A adhere. To measure the amount of slime adhering thereto, the white water A is circulated through the water pipe 7 for a predetermined period of time to allow the slime to adhere to the inner walls of the adhesion plates 6 in the water box 3, i.e., the adhesion portion 63, and then the clear water B is caused to flow for a predetermined period of time as the white water A is discharged from the box 3; a laser beam is then applied to the inner walls of the adhesion plates 6, that is, the slime adhesion portion 63, and is collected by the laser beam receiver 5; the transmission of the laser beam passing through the adhesion portion 63 is calculated for determining the amount of slime adhering to the adhesion portion 63.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pollution measuring device for measuring the pollution of white water and the adhesion of slime to a water system in a paper mill.

[0002]

2. Description of the Related Art Conventionally, slime in a paper mill is mainly used in the preparation of raw materials in the papermaking process, and in the primary and secondary papermaking processes.
Adhered to the tertiary circulation system, wastewater recovery and purification process, etc., and obstructs flow. In addition, slime adheres to and forms in any of the water systems of paper mills depending on the conditions.In particular, white water pits, sevors, flow boxes,
Attaches to inlets, etc.

[0003] The slime adhered and formed may affect the productivity and the product quality as an operational problem. One of the problems is that when pulp is sent to a wire and made into paper, the pulp is added to the pulp together with the pulp. Since the white water that has passed through is circulated again with new pulp, prevention of slime generation has become an important issue. Various kinds of chemicals are used to prevent the generation of the slime.

[0004] However, there are many types of these drugs, and the method of use differs depending on the drug. Specifically, there are an impact drug addition method and a continuous drug addition method.
The drug had to be used appropriately in consideration of the addition time, the number of additions, the addition concentration, and the like. further,
What is important with the use of drugs is that they need to know in real time how effective they are.

[0005] To determine the effect of the slime in the papermaking system, the contamination of microorganisms, which is a growth factor of slime, is determined by measuring the number of viable bacteria and ATP measurement performed at regular intervals. Predict the state of adhesion. This is to estimate the slime adhesion by measuring the number and activity of the microorganisms, and also to determine the presence or absence of a drug effect, not directly measure the slime adhesion state, In the measurement of the state of adhesion, it is an indirect thing and is only expected.

[0006]

The present invention has been made in view of the above-mentioned problems, and provides a pollution measuring device capable of simulating a slime adhesion state in a papermaking system and directly measuring the amount of the slime adhesion. The purpose is to do so.

[0007]

SUMMARY OF THE INVENTION The gist of the present invention is that a pollution measuring section is provided in a flowing channel through which water to be inspected or fresh water flows, and the pollution measuring section has a laser beam irradiation section and a light receiving section. The part is provided in a pair with a measuring flow channel configured to transmit laser light, and an attaching means for attaching contaminants to the measuring flow channel is on the laser light beam and can transmit the laser light It is a water-based pollution measuring device characterized by being provided in the.

[0008] The contamination measuring device of the present invention will be described in more detail. Inspection water or fresh water pumped up by a pump provided in the device is allowed to flow through a flowing water channel provided with a contamination measuring section for a certain period of time. Inspection water containing pollutants and fresh water containing no pollutants are supplied to the water channel by plugs and valves provided in the piping inside or outside the device.
The flow is switched manually or automatically. The flowing water channel may be any member as long as it can flow the test water or fresh water, and may be a tubular pipe or an appropriately formed member capable of flowing water. The material may be made of a material such as metal or resin.

[0009] A pollution measuring section is provided at an appropriate portion of the flow channel, the pollution measuring section has an appropriate space, and is provided with an inlet and an outlet. That is, a measuring water channel is provided, and a laser light irradiation unit and a light receiving unit are provided in a pair with the measuring water channel interposed therebetween. Further, a plurality of pairs of the laser beam irradiation unit and the light receiving unit may be provided in the flowing water channel direction. The shape of the measuring water channel is not particularly limited, and may be a box shape or a tubular shape, but a part or the whole is formed of a member that can transmit laser light. A plate or a glass plate is preferred. Further, the laser beam irradiation part and the light receiving part may be attached to the side wall of the measurement water channel.

In the laser beam irradiating section, a general commercial product such as a laser light emitting diode can be used as a laser light emitting device. The laser light has a wavelength of 7
A general measurement laser of 80 nm can be used, and JIS standard class 1, class 2 and class 3 can be used for an infrared laser, but class 3B is preferable.
The light receiving portion is not particularly limited as long as it is suitable for the laser light.

[0011] The attachment means is provided in the measuring water channel.
Any material can be used as long as a contaminant, that is, a slime can be attached thereto, but at least the portion on the light beam through which the laser beam passes must be formed of a material through which the laser beam can pass. Specifically, a part or the whole of the attaching means may be formed using a colorless and transparent acrylic plate or a glass plate. Regarding the installation form, the entire attaching means having an appropriate shape may be installed inside the measuring water channel, or the inner wall of the measuring water channel may be used as the attaching means. It is also desirable that the attachment means or the measuring water channel be removed so that it can be washed.

As a measuring method, the test water is circulated for a certain time in a flowing water channel provided with a pollution measuring unit capable of flowing by switching between the test water and the fresh water, and then the fresh water is made to flow for a certain time. Then, a laser beam may be applied to the attachment means provided in the measuring water channel to measure the amount of attached contaminants based on the transmittance of the laser beam. The transmittance can be displayed by using a commercially available amplifier unit. As a specific commercially available product, an amplifier unit such as the amplifier unit LX2-V10 can be used.

[0013]

Since the water-based pollution measuring apparatus of the present invention is configured as described above, the water to be inspected is circulated for a predetermined time in the flowing water channel in which the pollution measuring section is provided. Thus, every time the test water passes through the contamination measurement section, the contaminants in the test water adhere to the adhesion means of the measurement flow channel. Next, the circulation of the test water is stopped, and fresh water is allowed to flow through the same channel for a certain period of time. As a result, the test water is discharged from the measurement flow channel of the contamination measurement unit. Thereafter, the attachment means is irradiated with laser light and collected by a light receiver, the transmittance of the laser light passing through the attachment means is calculated, and the amount of contaminants, ie, slime, attached to the attachment means is determined. .

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a pollution measuring device according to the present invention, wherein 1 is a pollution measuring device mounted on a movable carriage. Things. Further, it may be fixedly installed on a production line, or may be appropriately arranged according to the water system of a paper mill or a water treatment facility. This figure shows a state in which the pipe 71/72 of the white water A or the fresh water B is connected to the pump 8, but when the pollution measuring device 1 is relocated, the pipe 71/72 is disconnected at the input part of the pump 8. be able to.

Reference numeral 2 denotes a contamination measuring unit, 3 denotes a measuring water flow box through which white water A or fresh water B flows, 4 denotes a laser irradiator, and 5 denotes a laser light receiver. Reference numeral 6 denotes an attachment plate which is also a side wall of the measuring water box 3, and slime adheres to an attachment portion 63 facing the water passage 32 shown in FIG. 7 is a flowing water pipe through which white water A or fresh water B flows, 8 is a pump through which white water A or fresh water B flows,
9 is a stop plug of the pipe 71/72.

FIG. 2 is a perspective view of the contamination measuring section. The measuring water flowing box 3 can be removed from the flowing water pipe 7 by the attachment / detachment tool 31 so that the inside can be washed. The attachment plate 6 is attached to the measuring water flowing box 3 with a fixing screw 61 so that the attachment portion 63 can be washed. Further, since the attachment plate 6 is fastened with the fixing screws 61 with the holding frame 62 interposed, the entire attachment plate 6 is almost uniformly tightened.

FIG. 3 is a partial sectional view of the measuring water box.
Reference numeral 32 denotes a flowing water channel through which the white water A or the fresh water B flows, and reference numeral 63 denotes an attachment portion for attaching slime. FIG. 4 is an arrangement diagram of the contamination measuring device in the manufacturing process. An example of measurement by the present pollution measuring device 1 is as follows.
, And the measuring water box 3 is circulated and switched to the fresh water B four times a day, and then the slime adhesion state is measured. At this time, the case where no drug was added and the case where the drug was added at 20 ppm
Comparative measurements were made over time with the case of adding.

When no drug was added, the measured voltage reached 400 mv on the fifth day, and the adhesion of slime was confirmed. On the eighth day, the measured voltage reached 800 mv, indicating that slime adhesion was progressing. It could be confirmed by measurement. In the case of drug addition, the measured voltage reached 400 mv on the 14th day, and slime adhesion was confirmed. As a result, the effect of the drug is 1
It was confirmed by direct measurement that it had lasted for 4 days.

Then, the transmittance of the laser beam is calculated,
The attached amount of the attached slime is summarized in a predetermined determination result. The display of the transmittance is performed by the amplifier unit. Alternatively, an electronic device such as a personal computer that performs arithmetic control, or a display device such as a printer may be connected to perform statistical measurement processing.

[0020]

[Effect] Since the pollution measuring device of the present invention is configured as described above, it is possible to simulate the adhesion of slime in the papermaking system in the papermaking process in a paper mill, and thus the slime adhesion state can be directly measured. Can be accurately and accurately measured. Accordingly, it is possible to promptly take measures to extend the papermaking period, determine the necessary time of the holiday, and furthermore, take appropriate measures for extending the papermaking period.

Further, since the slime adhesion state can be grasped in real time, the amount of the slime control agent or the like to be added can be switched to the addition according to the adhesion state. An appropriate amount of medicine can be set.

Accordingly, it is possible to efficiently avoid the contamination caused by the microorganism by the slime control agent.
Since the present pollution measurement device can easily and accurately measure the pollution status of a water system, it can be applied to a water treatment device such as a cooling tower, and further, can be applied to a circulation device of a water supply system.

[Brief description of the drawings]

FIG. 1 is a side view of a contamination measuring device according to the present invention.

FIG. 2 is a perspective view of a contamination measuring unit.

FIG. 3 is a partial sectional view of a measuring water box.

FIG. 4 is an arrangement diagram of a pollution measuring device in a manufacturing process.

[Description of Signs] 1-Pollution measurement device, 2-Pollution measurement section, 3-Measuring water box,
31- detachable tool, 32-water channel, 4-laser irradiator, 5
-Laser receiver, 6-adhesion plate, 61-fixing screw, 62
-Frame, 63-adhesion part, 7-running water pipe, 71-piping, 72-
Piping, 8-pump, 9-stop plug, 10-white water pit, 1
1-inlet, 12-outlet, 13-paper, 14-wire, 15-inlet, 16-pulp, 17-filter, 18-fan pump, 19-type box, A-white water, B-
Shimizu

Claims (4)

[Claims] (1) Contamination of flowing water channel through which test water or fresh water flows
A measuring unit is provided, and the contamination measuring unit
Irradiation part and light receiving part are configured to transmit laser light
It is provided in a pair with the measuring water channel interposed, and
Is a laser light
Being provided on the light beam and capable of transmitting laser light
Water-based pollution measuring device characterized by the following: 2. The water-based contamination measuring apparatus according to claim 1, wherein a plurality of pairs of the laser beam irradiation section and the light receiving section are provided. 3. An apparatus according to claim 1, wherein said attachment means is an inner wall of a measuring flow channel. 4. A measuring water flow, wherein a contamination measuring section is provided in a flowing water channel through which the test water or fresh water flows, and the contamination measuring section has a laser light irradiating section and a light receiving section configured to transmit laser light. The measuring water channel is provided with a pair of adhering means for adhering a contaminant on the light beam of the laser beam and capable of transmitting the laser beam. A method for circulating for a certain period of time, then flowing fresh water for a certain period of time, and then irradiating the attaching means with laser light and measuring the amount of attached contaminants based on the transmittance of the laser light.