JP6985068B2 - Fluid mixer and test equipment - Google Patents

Description

The present invention relates to a fluid mixing device and a test device.

There is a test device for testing the removal performance of the removal device by passing a gas containing a specific chemical component through a removal device for removing the chemical component and then measuring the residual amount of the chemical component. For example, Patent Document 1 describes a reaction vessel that can be filled with a catalyst corresponding to a removal device, a means for supplying a reaction gas to the inside of the reaction vessel, and the reaction gas coming into contact with the plurality of catalysts. A preparative device that separates by sucking the produced gas corresponding to each of the plurality of catalysts produced by the catalyst, a suction device that can control the suction amount of the produced gas, and the produced gas. Disclosed is a catalyst performance evaluation device characterized in that an analyzer that detects a signal according to a type and concentration, and the preparative device, the analyzer, and the suction device are connected via a flow path switching device. Has been done.

Japanese Unexamined Patent Publication No. 2002-168738

In such an evaluation device, in order to create a gas containing a chemical component, it is conceivable to mix the second fluid in a liquid state with the first fluid. In such cases, the bubbling method or the permeator method is generally used. However, the bubbling method requires a long time to stabilize the concentration of the second fluid. In addition, the permeator method has a high installation cost of the device and is not easy to install.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to facilitate the supply of a liquid when a fluid in a liquid state is mixed with a fluid in a gaseous state.

In order to achieve the above object, in the present invention, as a first means relating to the fluid mixing device, a supply port is arranged in the flow path of the first fluid in a gaseous state, and the first means in a liquid state with respect to the supply port. 2 Adopt a means of providing a syringe pump for pumping fluid.

In the present invention, as a second means relating to the fluid mixing device, in the first means, the syringe pump has a needle-shaped thin tube having the supply port, a tubular body to which the thin tube is connected, and the cylinder. A means of including a pusher that allows the second fluid stored in the body to move to the thin tube and an actuator that moves the pusher is adopted.

In the present invention, as the third means relating to the fluid mixing device, in the second means, the means that the open end of the thin tube is arranged at the center of the flow path is adopted.

In the present invention, as a fourth means relating to the fluid mixing device, in the second or third means, the thin tube is formed of the thin tube as the opening end toward the downstream side in the flow direction of the first fluid. A means of being inclined with respect to the flow direction of the first fluid so as to be separated from the root side is adopted.

In the present invention, as the fifth means relating to the fluid mixing device, it is provided in contact with the thin tube in any of the above 2 to 4 and is provided between the flow path and the cylinder. A means of providing a heat dissipation plate is adopted.

In the present invention, as the sixth means relating to the fluid mixing device, the means of any one of the above 1 to 5 is provided with a heater for heating the region including the supply port.

In the present invention, as the first means according to the test apparatus, the fluid mixing apparatus according to any one of claims 1 to 6 for supplying an inspection fluid in which a first fluid and a second fluid are mixed, and the fluid mixing apparatus. A means of providing a chromatograph device for measuring the components of the inspection fluid supplied from the fluid mixing device and passing through the test object is adopted.

According to the fluid mixing device of the present invention, the second fluid in a liquid state is discharged to the first fluid by a syringe pump and mixed. The syringe pump is easily available and the flow rate of the liquid can be easily adjusted. Therefore, when the second fluid in a liquid state is mixed with the first fluid, the concentration can be adjusted more easily and in a shorter time than when the bubbling method is used. Further, the fluid mixing device in the present embodiment does not need to be provided with a permeator device, and can easily mix a gas and a liquid. Therefore, the present invention can facilitate the supply of a liquid when mixing a fluid in a liquid state with a fluid in a gaseous state.

It is a schematic diagram which shows the structure of the catalyst performance test apparatus in one Embodiment of this invention. It is a schematic diagram which shows the detailed structure of the fluid mixing apparatus in one Embodiment of this invention. It is a partially enlarged view of the fluid mixing apparatus in one Embodiment of this invention. It is a graph which shows an example of the measurement result in the catalyst performance test apparatus in one Embodiment of this invention. It is a partially enlarged view which shows the modification of the fluid mixing apparatus in one Embodiment of this invention.

Hereinafter, an embodiment of the pulverized coal burner according to the present invention will be described with reference to the drawings. In the following drawings, the scale of each member is appropriately changed in order to make each member recognizable.

As shown in FIG. 1, the catalyst performance test device 1 (evaluation device) in the present embodiment includes a gas supply unit 2, a gas heating unit 3, a fluid mixing unit 4, and a gas chromatograph unit 5.

The gas supply unit 2 includes a nitrogen gas cylinder 2a for supplying nitrogen gas, an oxygen gas cylinder 2b for supplying oxygen gas, a nitrogen mass flow controller 2c for adjusting the flow rate of nitrogen gas flowing to the gas heating unit 3, and a gas heating unit. It includes an oxygen mass flow controller 2d that adjusts the flow rate of oxygen gas flowing to 3 and a gas chromatograph device carrier gas mass flow controller 2e that flows to the gas chromatograph unit 5. Further, a pressure reducing valve (not shown) is connected to the nitrogen gas cylinder 2a and the oxygen gas cylinder 2b, and the nitrogen gas and the oxygen gas are supplied to the nitrogen mass flow controller 2c and the oxygen mass flow controller 2d in a reduced pressure state. .. Further, a part of the nitrogen gas in the nitrogen gas cylinder 2a is directly supplied to the gas chromatograph unit 5. The nitrogen gas cylinder 2a and the oxygen gas cylinder 2b are connected by a pipe via a nitrogen mass flow controller 2c and an oxygen mass flow controller 2d. The gas supply unit 2 supplies oxygen and nitrogen carrier gas (first fluid) to the gas heating unit 3 and supplies nitrogen to the gas chromatograph unit 5.

The gas heating unit 3 is a tubular heating furnace, and includes a pipe member and a heater provided on the outer periphery of the pipe member. Further, the gas heating unit 3 is connected to the fluid mixing device 4 by a pipe (not shown) connected to the pipe member. The gas heating unit 3 is a device that heats the carrier gas supplied from the gas supply unit 2 by a heater.

As shown in FIGS. 1 and 2, the fluid mixing device 4 includes a syringe pump 4a, a connecting member 4b, a septum 4c, a gas mixing unit 4d, and a heat radiating plate 4e. The syringe pump 4a includes a tubular body 4a1, a plunger 4a2, a thin tube 4a3, and an actuator 4a4. The tubular body 4a1 has a bottomed cylindrical shape and has an opening at the bottom. The plunger 4a2 is a long member that is partially inserted into the tubular body 4a1 and is movable along the axial direction of the tubular body 4a1. The plunger 4a2 is connected to the actuator 4a4.

The thin tube 4a3 has a supply port P, is a hollow needle-shaped member, and communicates with the inside of the tubular body 4a1 by being connected to the opening of the tubular body 4a1. The thin tube 4a3 is inclined so that the supply port P is formed and the end (opening end) on the side opposite to the root connected to the tubular body 4a1 is gradually separated from the root side. The thin tube 4a3 is connected to the side surface of the connecting member 4b, and the supply port P is arranged at the center of the gas flow path R in the connecting member 4b. Further, as shown in FIG. 3, the end of the thin tube 4a3 flows so as to gradually separate from the root side toward the downstream side in the flow direction of the carrier gas in the gas flow path R in the connecting member 4b. It is arranged so as to be inclined with respect to the direction. The actuator 4a4 is a drive device for moving the plunger 4a2 in the axial direction of the tubular body 4a1.

In such a syringe pump 4a, the plunger 4a2 is pushed toward the bottom surface of the cylinder 4a1 by the actuator 4a4, so that the liquid organic compound (second fluid) stored inside the cylinder 4a1 is discharged into the cylinder. It is a device for pumping from 4a1 through a thin tube 4a3.

The connecting member 4b is a T-shaped tubular member having a first pipe portion 4b1 and a second pipe portion 4b2 connected to the side peripheral surface of the first pipe portion 4b1 so as to be orthogonal to the first pipe portion 4b1. be. In the connecting member 4b, both ends of the first pipe portion 4b1 communicate with the gas pipe, and a gas flow path R is formed inside. Further, the open end of the thin tube 4a3 is inserted into the second tube portion 4b2 of the connecting member 4b and sealed by the septum 4c. The septum 4c has a substantially columnar shape, seals the second tube portion 4b2, and has a thin tube 4a3 penetrating in the center.

The gas mixing portion 4d is a tubular member having a larger flow path diameter than the gas pipe provided on the downstream side of the connecting member 4b. When the inspection fluid passes through the gas mixing section 4d, the flow velocity increases, the contained organic compound is completely vaporized, and the carrier gas and the organic compound are well mixed. The heat radiating plate 4e is a plate-shaped member that is penetrated through the thin tube 4a3 and is provided between the tubular body 4a1 and the septum 4c, and is a liquid organic compound in which the heat of the carrier gas is stored in the tubular body 4a1. It prevents it from being transmitted.

The gas chromatograph unit 5 includes a hexagonal valve 5a connected to the gas supply unit 2 and the fluid mixing device 4, a calibration tube 5b connected to the hexagonal valve 5a, and a gas chromatograph device 5c. The hexagonal valve 5a is a valve that supplies the inspection fluid that has passed through the catalyst X and the nitrogen gas supplied from the nitrogen gas cylinder 2a to the gas chromatograph device 5c. The calibration tube 5b is a tubular member having both ends connected to two opposing connecting portions of the hexagonal valve 5a. The calibration tube 5b expands the internal capacity of the hexagonal valve 5a by storing the fluid inside.

The gas chromatograph device 5c includes a constant temperature bath 5c1, a column 5c2, and a detector 5c3. The constant temperature bath 5c1 is a box body having a heater (not shown) and whose temperature is kept constant. The column 5c2 is a member in which an elongated pipe is filled with a filler, and is housed in a constant temperature bath 5c1. The sample gas is separated by the contained substance by passing between the fillers of the column 5c2. The detector 5c3 is a device connected to the downstream side of the column 5c2 and detects the concentration of each substance in the sample gas separated for each substance. Further, the sample gas discharged from the detector 5c3 is treated as exhaust gas.

In such a catalyst performance test apparatus 1, the catalyst X (test object) having an effect of removing the organic compound is passed through the inspection fluid vaporized by mixing the organic compound with the carrier gas, and the gas chromatograph apparatus 5c is used. , A device for measuring the residual amount of organic compound components in the inspection fluid. The catalyst X is provided between the gas mixing unit 4d and the hexagonal valve 5a.

The operation of the catalyst performance test apparatus 1 in this embodiment will be described with reference to FIG.
First, the nitrogen gas and the oxygen gas supplied from the nitrogen gas cylinder 2a and the oxygen gas cylinder 2b pass through the nitrogen mass flow controller 2c and the oxygen mass flow controller 2d and then merge to form a carrier gas, which is supplied to the gas heating unit 3. .. The carrier gas is heated to, for example, about 100 ° C. to 200 ° C. by passing through the gas heating unit 3, and is supplied to the fluid mixing device 4.

In the fluid mixing device 4, the carrier gas flowing through the gas flow path R in the connecting member 4b comes into contact with the droplet-shaped organic compound discharged from the thin tube 4a3 arranged at the center of the gas flow path R. In the fluid mixing device 4, the actuator 4a4 is driven to push the organic compound in the tubular body 4a1 by the plunger 4a2, and the organic compound is pushed out into the thin tube 4a3 to form droplets of the organic compound at the tip of the thin tube 4a3. Will be done. The droplets of the organic compound formed at the tip of the thin tube 4a3 come into contact with the carrier gas flowing through the gas flow path R, separate from the thin tube 4a3, and are swept downstream of the gas flow path R by the carrier gas. At the same time, the droplets of the organic compound in the gas flow path R are gradually vaporized by coming into contact with the heated carrier gas, become a gas state in the gas mixing section 4d, and are sufficiently mixed with the carrier gas to be sufficiently mixed with the carrier gas to be inspected. It becomes.

Then, the inspection fluid passes through the catalyst X, is supplied to the hexagonal valve 5a, passes through the calibration tube 5b, and is exhausted. Next, as the hexagonal valve 5a is rotated, the nitrogen supplied from the nitrogen gas cylinder 2a passes through the calibration tube 5b and is supplied to the column 5c2 of the gas chromatograph device 5c via the hexagonal valve 5a. Since the inspection fluid remains in the calibration tube 5b, the inspection fluid extruded by the nitrogen gas is supplied to the column 5c2.

Further, a part of the nitrogen gas supplied from the nitrogen gas cylinder 2a is supplied to the constant temperature bath 5c1 of the gas chromatograph device 5c, and the constant temperature tank 5c1 is filled with the nitrogen gas. Further, the constant temperature bath 5c1 is held at a predetermined temperature by a heater (not shown). On the other hand, the inspection fluid supplied to the column 5c2 gradually becomes separated for each component by passing through the filler, and passes through the detector 5c3 provided downstream of the column 5c2 for each component. Concentration is measured. Then, the inspection fluid that has passed through the detector 5c3 is discharged.

By performing the evaluation test of the catalyst X in such a catalyst performance test apparatus 1, for example, the detection result as shown in FIG. 4 can be obtained. The vertical axis shows the peak area of the organic compound in the inspection fluid at the outlet of the column 5c2, and the horizontal axis shows the time. The time required for detection differs for each organic compound due to the difference in the adsorption characteristics of the organic compound in the catalyst X. By evaluating such a detection result, the characteristics and performance of the catalyst X can be evaluated.

According to the fluid mixing device 4 in the present embodiment as described above, the organic compound in a liquid state is discharged to the carrier gas by the syringe pump 4a and mixed. The flow rate of the syringe pump 4a can be easily adjusted. Therefore, when the liquid is mixed with the carrier gas, the concentration of the organic compound can be adjusted more easily and in a shorter time than when the bubbling method is used. Further, the fluid mixing device 4 in the present embodiment does not need to be provided with a permeator device, and can mix gas and liquid relatively inexpensively and easily.

Further, according to the fluid mixing device 4 in the present embodiment, the organic compound can be supplied to the carrier gas by the needle-shaped thin tube 4a3. Therefore, the droplets of the organic compound can be supplied into the gas flow path R, and the carrier gas and the organic compound can be efficiently brought into contact with each other.

Further, according to the fluid mixing device 4 in the present embodiment, the tip of the thin tube 4a3 is arranged at the center of the gas flow path R. Therefore, the droplets of the organic compound discharged from the thin tube 4a3 come into contact with more carrier gas and are easily vaporized.

Further, according to the fluid mixing device 4 in the present embodiment, the thin tube 4a3 is gradually separated from the root side toward the downstream side in the flow direction of the carrier gas in the gas flow path R in the connecting member 4b. , The open end is arranged so as to be inclined with respect to the flow direction. As a result, the area of the supply port P of the thin tube 4a3 is expanded, and droplets of the organic compound are formed in the direction of the flow of the carrier gas, so that the organic compound comes into contact with the carrier gas more easily and is easily vaporized.

Further, according to the fluid mixing device 4 in the present embodiment, the heat radiating plate 4e is provided to prevent the liquid organic compound stored in the cylinder 4a1 from being vaporized by the heat of the carrier gas. As a result, the syringe pump 4a can supply the organic compound to the carrier gas with an accurate liquid amount.

Further, according to the catalyst performance test device 1 in the present embodiment, the above-mentioned fluid mixing device 4 is provided. Therefore, in the catalyst performance test apparatus 1, the organic compound in a liquid state can be stably mixed with the carrier gas in a short time and stably and further vaporized. Therefore, the catalyst performance test apparatus 1 can easily perform the test by mixing the sample in the liquid state with the carrier gas.

Although the preferred embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to the above embodiment. The various shapes and combinations of the constituent members shown in the above-described embodiment are examples, and can be variously changed based on design requirements and the like without departing from the spirit of the present invention.

In the above embodiment, the thin tube 4a3 of the syringe pump 4a has a smooth opening end, but the present invention is not limited thereto. As shown in FIG. 5, the open end of the thin tube 4a3 may have a shape or a corrugation in which a mountain shape and a valley shape are repeated, for example, by regularly forming protrusions at a plurality of places. In this case, since the surface area of the open end of the thin tube 4a3 is increased as compared with the shape of the open end of the thin tube 4a3 in the above embodiment, the surface area of the droplet of the organic processed material is also increased, and it is easier to come into contact with the carrier gas. Become.

Further, by covering the outer periphery of the connecting member 4b with a ribbon heater formed in a band shape, the gas flow path R can be heated from the outside. By heating the gas flow path R, the temperature of the carrier gas can be raised and the contacted organic compound can be easily vaporized.

Further, in the above embodiment, the thin tube 4a3 of the syringe pump 4a is formed so that the opening end is formed obliquely with respect to the flow direction of the gas flow path R, but the present invention is not limited to this. The thin tube 4a3 of the syringe pump 4a may be formed so that the opening end is parallel to the axial direction of the thin tube 4a3, and the opening end may be arranged so as to be parallel to the flow direction of the gas flow path R. .. In this case, the force applied to the organic compound at the open end of the thin tube 4a3 in the direction of pushing back to the cylinder 4a1 by the carrier gas becomes small.
Further, the thin tube 4a3 of the syringe pump 4a is formed so that the opening end is parallel to the axial direction of the thin tube 4a3, and further, it is assumed that the above-mentioned chevron shape and valley shape are repeated in a shape or waveform. May be good.

1 Catalyst performance test equipment 2 Gas supply unit 2a Nitrogen gas cylinder 2b Oxygen gas cylinder 2c Nitrogen mass flow controller 2d Oxygen mass flow controller 2e Gas chromatograph device Carrier gas mass flow controller 3 Gas heating unit 4 Fluid mixing device 4a Syringe pump 4a1 Cylindrical body 4a2 Plunger 4a3 Thin tube 4a4 Actuator 4b Connection member 4b1 First tube part 4b2 Second tube part 4c Septum 4d Gas mixing part 4e Heat dissipation plate 5 Gas chromatograph part 5a Hexagonal valve 5b Calibration tube 5c Gas chromatograph device 5c1 Constant temperature bath 5c2 Column 5c3 Detector

Claims (6)

A supply port is arranged in the flow path of the first fluid in a gaseous state, and a syringe pump for pumping the second fluid in a liquid state to the supply port is provided .
The syringe pump is
A needle-shaped thin tube having the supply port and
The cylinder to which the thin tube is connected and
A plunger that allows the second fluid stored in the cylinder to move to the thin tube, and a plunger.
It is equipped with an actuator that moves the plunger.
The thin tube is characterized in that the opening end is inclined with respect to the flow direction of the first fluid so as to be separated from the root side of the thin tube toward the downstream side in the flow direction of the first fluid. Fluid mixer. The fluid mixing apparatus according to claim 1 , further comprising a heat radiating plate provided in contact with the thin tube and between the flow path and the cylinder. A supply port is arranged in the flow path of the first fluid in a gaseous state, and a syringe pump for pumping the second fluid in a liquid state to the supply port is provided.
The syringe pump is
A needle-shaped thin tube having the supply port and
The cylinder to which the thin tube is connected and
A plunger that allows the second fluid stored in the cylinder to move to the thin tube, and a plunger.
It is equipped with an actuator that moves the plunger.
A fluid mixing device provided in contact with the thin tube and provided with a heat radiating plate provided between the flow path and the cylinder. The fluid mixing apparatus according to any one of claims 1 to 3, wherein the open end of the thin tube is arranged at the center of the flow path. The fluid mixing apparatus according to any one of claims 1 to 4, further comprising a heater for heating a region including the supply port. The fluid mixing apparatus according to any one of claims 1 to 5 for supplying an inspection fluid in which a first fluid and a second fluid are mixed, and an inspection supplied from the fluid mixing apparatus and passing through a test object. A test device including a gas chromatograph device for measuring the components of a fluid.

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