JP2015210238A - Concentration measurement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concentration measurement device that can be installed to a pipe with a large diameter or a storage bottle, for example, and further can be put into a branch pipe attached to a main pipe and therefore can precisely measure the concentration by phase measurement or power measurement or a combination thereof.SOLUTION: A concentration measurement device 40 is formed of parallel arrangement of a window material 3 of a microwave transmitting unit transmitting a microwave 7 to a measurement target 31 and a window material 4 of a microwave receiving unit receiving a microwave going through the measurement target 31. The microwave 7 is transmitted into the direction of the parallel arrangement of the window materials 3 and 4.

Description

  The present invention relates to a concentration measuring apparatus that measures the concentration of a sample using a microwave.

  Conventionally, as a concentration measuring apparatus that measures the concentration of a substance in a sample, for example, there is a device that measures a change in the propagation speed of a microwave as a phase difference and measures the concentration based on the phase difference. Samples include, for example, black liquor, green liquor, white liquor, color, pulp liquor in paper pulp, various solutions and slurries in the chemical industry, various metal slurries in ironmaking and nonferrous metal refining, earth and sand slurries in civil engineering, cement Slurry and the like.

  As such a concentration measuring device, for example, there is a microwave densitometer described in Patent Document 1 below. This microwave densitometer has a microwave transmitting antenna and a receiving antenna provided on a side surface of a pipe formed of a metal pipe as a detection unit in a direction perpendicular to the pipe axis of the pipe via the pipe. They are arranged opposite to each other.

JP 2010-2268 A

  However, in the conventional microwave densitometer, as described above, the microwave transmitting antenna and the receiving antenna are arranged opposite to each other in a direction orthogonal to the pipe axis of the pipe via the pipe. It is necessary to match the pipe diameter. In other words, depending on the pipe diameter, a dedicated pipe or a dedicated pipe must be prepared. In areas such as paper pulp liquid and sewage water, many pipe diameters are large, and an assortment according to the applicable piping is required.

  In the case of measuring waste paper or sewer sewage, entrained bubbles are likely to be generated, and the measured value may be larger than the actual value due to the bubbles. Therefore, it is necessary to crush bubbles by applying pressure, and it is necessary to correct the bulk density by providing a γ-ray density meter. In particular, when the tube diameter is large, it is necessary to strengthen the gamma ray source, so that it is not convenient and the bulk density cannot be corrected in practice. In addition, a storage bin or the like cannot be subjected to bulk density correction in practice.

  The present invention has been proposed in view of the above circumstances. In other words, it can be installed in pipes or storage bins with large pipe diameters, and can be inserted into branch pipes attached to the main pipe. Therefore, it must be accurately measured by phase measurement, power measurement, and combinations thereof. An object is to provide a concentration measuring apparatus capable of performing the above.

  In order to achieve the above object, a concentration measuring apparatus according to the present invention is a concentration measuring apparatus for measuring a concentration of a sample by a microwave, and a microwave transmission unit that transmits the microwave and the sample that has passed through the sample. A microwave receiving unit that receives a microwave is arranged in parallel, and the microwave is transmitted in a direction in which the microwave transmitting unit and the microwave receiving unit are arranged in parallel.

  The concentration measuring apparatus according to the present invention is characterized in that the microwave transmitter and the microwave receiver are supported on the same surface by the same surface member.

  The concentration measuring apparatus according to the present invention includes a γ-ray reflection type density meter, and is characterized in that the bulk density is measured and the density is corrected.

  The concentration measuring apparatus according to the present invention is characterized in that the γ-ray hole of the γ-ray reflection type densitometer is arranged in parallel with the microwave transmitter and the microwave receiver.

  The concentration measuring apparatus according to the present invention is characterized in that the microwave and the γ-ray of the γ-ray reflection type density meter are crossed.

  The concentration measuring apparatus according to the present invention has the above-described configuration. Therefore, it can be attached to a pipe or a storage bottle having a large pipe diameter, and can be inserted into a branch pipe attached to the main pipe. Therefore, it is possible to accurately measure by phase measurement, power measurement, or a combination thereof.

  Since the types of the insertion units can be narrowed down, shorter wavelengths can be used, and the size can be reduced and the accuracy can be increased.

  Further, by combining with a reflection density meter for γ-rays, it is possible to perform bulk density correction, and it is possible to perform accurate and stable measurement with a weak radiation source.

  Furthermore, the measurement position can be adjusted by measuring the transmission of microwaves and the reflection of γ rays alternately or crossed, the accuracy can be improved, and accurate measurement can be performed.

It is a schematic diagram of a concentration measuring device concerning a first embodiment of the present invention. It is the schematic of the density | concentration measuring apparatus which concerns on 2nd embodiment of this invention. It is the schematic of the density | concentration measuring apparatus which concerns on 3rd embodiment of this invention. It is the schematic of the density | concentration measuring apparatus which concerns on 4th embodiment of this invention. It is the schematic of the density | concentration measuring apparatus which concerns on 5th embodiment of this invention. It is the schematic of the density | concentration measuring apparatus which concerns on 6th embodiment of this invention. It is the schematic of the density | concentration measuring apparatus which concerns on 7th embodiment of this invention. It is the schematic of the density | concentration measuring apparatus which concerns on 8th embodiment of this invention.

  Hereinafter, a concentration measuring apparatus according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an example in which a concentration measuring device in which a window material of a microwave transmission unit and a window material of a microwave reception unit are convexly arranged on the same insertion surface is inserted into a rectangular container.

  That is, as shown in FIG. 1, the concentration measuring device 40 according to the first embodiment is a microwave transmitter 1 that transmits a microwave 7, a microwave transmission window member 3 that is a window member thereof, and a sample. The microwave receiving unit 2 that receives the microwave 7 that has passed through the measurement object 31, the microwave receiving window member 4 that is the window member thereof, the microwave transmitting unit holding member 5 that holds the microwave transmitting unit 1, and the microwave A microwave receiver holding member 6 that holds the receiver 4 is provided. The microwave transmission unit 1 and the microwave reception unit 2 are arranged in parallel on the same insertion surface 21, and the microwave 7 is transmitted in the direction in which they are arranged in parallel. The window members 3 and 4 protrude from the same insertion surface 21 in a convex shape and are arranged in parallel.

  The concentration measuring device 40 is attached to the side surface of the rectangular container 32, and the window members 3 and 4 are arranged in parallel inside the container 32. The microwave 7 transmitted from the microwave transmission unit 1 (microwave transmission unit window material 3) is transmitted in a direction in which the window materials 3 and 4 are arranged in parallel, passes through the measurement object 31 inside the container 32, and is microscopic. It is received by the wave receiving unit 2 (microwave receiving unit window material 4).

  Here, FIG. 3 shows that the concentration measuring device in which the window material of the microwave transmission unit and the window material of the microwave reception unit are convexly supported on the same insertion surface by the same surface member is inserted into a rectangular container. This is an example.

  That is, the same insertion surface 21 may be realized by the same surface member 22 as in the concentration measuring device 42 of the third embodiment shown in FIG. The same surface member 22 is formed with an opening to which the microwave transmission part window member 3 and the microwave reception part window member 4 are attached in parallel. Each of the window members 3 and 4 is attached to the opening, and the microwave transmission unit 1 and the microwave reception unit 2 are arranged on the same surface member 22 in parallel. The same surface member 22 has various properties such as an electromagnetic wave absorber. With this configuration, measurement accuracy can be increased.

  FIG. 2 shows an example in which a concentration measuring device in which a window material of a microwave transmission unit and a window material of a microwave reception unit are arranged along a curved insertion surface is inserted into a circular container.

  That is, as shown in FIG. 2, in the concentration measuring device 41 of the second embodiment, the same insertion surface 21 is curved along the curved container 32. The microwave transmission unit 1 and the microwave reception unit 2 are arranged in parallel on the same insertion surface 21, and the microwave 7 is transmitted in the direction in which they are arranged in parallel. Each window member 3, 4 is curved along the same insertion surface 21. The concentration measuring device 41 is attached to the side surface of the circular container 32, and the window members 3 and 4 are arranged in parallel inside the container 32. Other configurations are the same as those in the first embodiment.

  Here, FIG. 4 is an example in which a concentration measuring device in which a window material of a microwave transmission unit and a window material of a microwave reception unit are supported on a curved insertion surface member is inserted into a circular container.

  That is, the same insertion surface 21 may be realized by the same surface member 22 as in the concentration measuring device 43 of the fourth embodiment shown in FIG. The same surface member 22 is curved along the curved container 32. Similarly to the third embodiment, the same surface member 22 is formed with an opening to which the microwave transmitter window member 3 and the microwave receiver window member 4 are attached in parallel. Each of the window members 3 and 4 is attached to the opening, and the microwave transmission unit 1 and the microwave reception unit 2 are arranged on the same surface member 22 in parallel. Each window member 3, 4 is curved along the same surface member 22. The same surface member 22 has various properties such as an electromagnetic wave absorber. With this configuration, measurement accuracy can be increased.

  FIG. 5 is an example in which a concentration measuring device in which a window material of a microwave transmission unit and a window material of a microwave reception unit are supported in a convex shape on a curved insertion surface member is inserted into a circular container. As in the concentration measuring device 44 of the fifth embodiment shown in FIG. 5, the window members 3 and 4 may protrude from the same insertion surface member 22 in a convex shape.

  FIG. 6 shows that the window material of the microwave transmission unit and the window material of the microwave reception unit are arranged on the same insertion surface in a convex shape, and a γ-ray reflection type densitometer that performs density correction by measuring the bulk density is integrated. This is an example in which a concentration measuring device arranged on the same surface is inserted into a rectangular container.

  That is, as shown in FIG. 6, the concentration measuring device 45 of the sixth embodiment adds a γ-ray reflection type densitometer 50 that performs bulk density measurement and density correction to the above-described concentration measuring device 40 of the first embodiment. Is provided. In the γ-ray reflection type density meter 50, the emission hole (γ-ray hole) of the γ-ray source unit 8 and the detection hole (γ-ray hole) of the γ-ray detection unit 9 include the microwave transmission unit 1 and the microwave reception unit. Between the two. The γ-ray source unit 8 and the γ-ray detection unit 9 are spaced from the same insertion surface 21.

  FIG. 7 shows a microwave measuring unit that measures the concentration of a sample by using a microwave, and a microwave receiving unit that transmits a microwave toward the sample, and a microwave receiver that transmits the microwave through the sample. The window material is an example of a concentration measuring device arranged on the same insertion surface, the window material of the microwave transmission unit, the window material of the microwave reception unit, and the γ-ray hole of the γ-ray source reflection type density meter Is an example of a concentration measuring device arranged on the same insertion surface.

  That is, the same insertion surface 21 may be realized by the same surface member 22 as in the density measuring device 46 of the seventh embodiment shown in FIG. Similar to the third embodiment, the coplanar member 22 includes the γ-ray source unit 8 and the γ-ray detection unit 9 in addition to the opening to which the microwave transmission unit window material 3 and the microwave reception unit window material 4 are attached. Are formed in parallel. The γ-ray source unit 8 and the γ-ray detection unit 9 are attached to the opening together with the window members 3 and 4, and are arranged on the same surface member 22 in parallel with the microwave transmission unit 1 and the microwave reception unit 2. Yes.

  FIG. 8 shows a microwave measuring unit for measuring the concentration of a sample by using a microwave, a window member of a microwave transmission unit that transmits the microwave toward the sample, and a microwave through which the microwave is received. It is an example of the concentration measuring device in which the wave receiving part window material is arranged on the same insertion surface, the window material of the microwave transmission part, the window material of the microwave reception and the γ of the γ-ray source reflection type density meter An example of a concentration measuring device in which a wire hole is arranged on the same insertion surface, and a microwave transmitting unit, a receiving unit, a γ-ray source unit, and a detecting unit are arranged so as to overlap or cross each other. This is an example in which reflection measurement regions that are backscattered by overlapping or crossing a wave and a beam of γ rays are overlapped.

  That is, as shown in FIG. 8, the density measuring device 47 of the eighth embodiment includes the microwave transmission unit 1 (microwave transmission unit window material 3) and the microwave reception unit 2 (microwave reception unit window material 4). ) And the γ-ray source unit 8 and the γ-ray detection unit 9 are arranged so as to cross each other so that the microwave 7 and the γ-ray scattered ray 10 are crossed, and the reflection measurement region for backscattering is overlapped. . That is, the microwave transmission unit 1 (microwave transmission unit window material 3) and the microwave reception unit 2 (microwave reception unit window material 4), the γ-ray source unit 8 and the γ-ray detection unit 9 are mutually connected. They face each other and are arranged so as to intersect in plan view.

  The microwave 7 is transmitted from the microwave transmission unit 1 (microwave transmission unit window material 3) on the front side in FIG. 8 and passes through the measurement target 31, and is received by the microwave reception unit 2 (microwave reception unit window material 4). Received at. The γ-ray scattered ray 10 is emitted from the γ-ray emission hole 11 (γ-ray hole) of the γ-ray source unit 8 from the front side to the back side of the paper surface, reflected from the back side of the paper surface to the front side, and the γ-ray detection unit 9. It is detected in the detection hole (γ ray hole). At that time, the microwave 7 and the γ-ray scattered ray 10 intersect.

  Next, effects of the embodiment of the present invention will be described.

  As described above, according to the concentration measuring devices 40 to 47, the microwave transmitter 1 and the microwave receiver 2 are arranged in parallel on the same insertion surface 21 or the same surface member 22, and these are arranged in parallel. A microwave 7 is transmitted in the direction. The concentration measuring devices 40 to 47 are attached to the side surface of the container 32, and the window members 3 and 4 are arranged in parallel inside the container 32. Therefore, since it is not necessary to mount it facing the diametrical direction of the pipe, it can be attached to a pipe having a large pipe diameter, a storage bottle, or the like, and can be inserted into a branch pipe attached to the main pipe. Therefore, it is possible to accurately measure by phase measurement, power measurement, or a combination thereof.

  According to the concentration measuring devices 42, 43, 44, and 46, the same surface member 22 has various properties such as an electromagnetic wave absorbing material. With this configuration, measurement accuracy can be increased.

  The density measuring devices 45 to 47 can perform bulk density correction by being combined with a γ-ray reflection densitometer, and can perform accurate and stable measurement with a weak radiation source.

  In the density measuring device 47, the microwave transmission unit 1 and the microwave reception unit 2, the γ-ray source unit 8, and the γ-ray detection unit 9 face each other and are arranged so as to intersect each other. Therefore, the measurement position can be adjusted by measuring the transmission of the microwave 7 and the reflection of the γ-ray scattered ray 10 alternately or crossed, the accuracy can be improved, and an accurate measurement can be performed.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited to the said embodiment. The present invention can be modified in various ways without departing from the scope of the claims.

DESCRIPTION OF SYMBOLS 1 Microwave transmission part 2 Microwave reception part 3 Microwave transmission part window material 4 Microwave reception part window material 5 Microwave transmission part holding member 6 Microwave reception part holding member 7 Microwave 8 γ-ray source part 9 γ-ray Detection unit 10 γ-ray scattered ray 11 γ-ray emission hole 21 Coplanar insertion surface 22 Coplanar member 31 Measurement object (sample)
32 containers 40 to 47 Concentration measuring device 50 γ-ray reflection type density meter

Claims (5)

In a concentration measuring device that measures the concentration of a sample by microwaves,
A microwave transmitter that transmits the microwave and a microwave receiver that receives the microwave that has passed through the sample are arranged in parallel, and the microwave transmitter and the microwave receiver are parallel. The microwave is transmitted in a direction to
Concentration measuring device characterized by that. The microwave transmission unit and the microwave reception unit are supported on the same surface by the same surface member,
The concentration measuring apparatus according to claim 1, wherein: A γ-ray reflection type density meter is provided, and the bulk density is measured and the density is corrected.
The concentration measuring apparatus according to claim 1 or 2, characterized in that The γ-ray hole of the γ-ray reflective densimeter is arranged in parallel with the microwave transmitter and the microwave receiver,
The concentration measuring apparatus according to claim 3, wherein: Crossing the microwave and the γ-ray of the γ-ray reflective densimeter,
5. The concentration measuring apparatus according to claim 3, wherein the concentration measuring apparatus is characterized in that

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