JP2001099765A - Carburetor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simply constituted and inexpensive carburetor not needing a cleaning installation for backwash. SOLUTION: This carburetor for separating and vaporizing volatile matter from within a measurement fluid is provided with a vaporization tank body 11, a heater 12 provided on the vaporization tank body 11 and heating the measurement fluid inside the vaporization tank body 11, an inflow port 14 provided on the vaporization tank body and wherethrough the measurement fluid flows into the vaporization tank body 11 by thermal convection generated by the measurement fluid heated by the heater 12, an outflow port 15 provided on the vaporization tank body and wherethrough the measurement fluid escapes out of the vaporization tank body by the thermal convection generated by the measurement fluid heated by the heater 12, a gas blow-in port 16 provided on the vaporization tank body for blowing in purge gas into the measurement fluid inside the vaporization tank body, and a gas take-out port 17 provided on the vaporization tank body for taking out the purge gas blown into the measurement fluid.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a volatile substance measuring device for measuring a volatile substance in a measurement fluid by, for example, a gas sensor, and separates the volatile substance from the measurement fluid.
The present invention relates to a vaporizer for vaporizing.

[0002] More specifically, the present invention relates to, for example, a vaporizer for heating a measurement fluid and blowing air to evaporate an oil component of a trace oil-in-water monitor for detecting a small amount of oil component mixed in tap water.

[0003] Further, the present invention relates to an inexpensive vaporizer which does not require a cleaning facility for backwashing, and which can be simply constructed.

[0004]

2. Description of the Related Art FIG. 5 is an explanatory view of a main part of a carburetor generally used in the prior art. For example, Yokogawa Technical Report Vo
l. 42-4 (1998) P140.

In the figure, a vaporizing tank body 1 of a closed container is shown.
Are provided with supply ports 2 and 3 for the measurement fluid FLo and the purge air Air, a drain port 4 on the side face, and a gas output port 5 on the top face. The heater 6 heats the measurement fluid FLo to a predetermined temperature. The pump 7 sends the measurement fluid FLo to the heater 6.

[0006] In the above configuration, the measurement fluid FLo heated to a predetermined temperature (40 ° C) from the measurement fluid FLo supply port 2, in this case, the river water passed through a sand filter (not shown) is supplied. At the same time, a constant flow of clean air is supplied from the purge air supply port 3.

As a result, volatile substances in the measurement fluid FLo, in this case, oil = volatile hydrocarbons are vaporized into the air and output from the gas output port 5 to a detector (not shown). Is done.

[0008] The measurement fluid FLo that has been vaporized is drained from the drain port 4 on the side surface of the vaporization tank body 1. On this occasion,
The drainage pipe is connected to a trap (not shown) so that air does not escape from the drainage port 4.

[0009]

However, such an apparatus has the following problems. (1) In order to measure raw water (river water), a filter (usually a sand filter) for removing large turbid components in the raw water is required before the vaporizer. .

(2) The sand filter needs to be regularly backwashed (flowing water in the opposite direction) with washing water (tap water) in order to remove clogged dust. Therefore, this vaporizer cannot be installed in a place where there is no utility (water pipe) called washing water.

(3) A trap is required so that air does not escape from the drain port 4. (4) In order to flow the measurement fluid FLo at a constant flow rate, a pump and a flow meter are required. These not only increase the cost, but also generally have many portions where the flow path is narrow, so that clogging is likely to occur, which tends to cause fluctuations in flow rate and stoppage.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide a simple and inexpensive vaporizer which does not require cleaning equipment for backwashing.

[0013]

According to the present invention, there is provided a carburetor comprising:
In a vaporizer for separating and vaporizing volatile substances from a measurement fluid, a vaporization tank main body, a heater provided in the vaporization tank main body and heating the measurement fluid in the vaporization tank main body, and a vaporization tank main body. An inflow hole into which the measurement fluid flows into the vaporization tank body by thermal convection generated by the measurement fluid heated by the heater, and the measurement fluid provided in the vaporization tank body and heated by the heater. An outflow hole through which a measurement fluid flows out of the vaporization tank main body due to generated heat convection; a gas injection port provided in the vaporization tank main body to blow a purge gas into the measurement fluid in the vaporization tank main body; A gas outlet provided in the main body to take out the purge gas blown into the measurement fluid, That.

As a result, (1) Since the flow path can be made sufficiently large even at the narrowest inflow hole and outflow hole portion of the flow path, there is no risk of clogging and fluctuation in flow rate, and even if a sand filter is not provided as pretreatment. A vaporizer capable of measuring river water (raw water) is obtained.

Therefore, a vaporizer can be obtained which can be easily installed even in a place where it is difficult to prepare washing water for backwashing.

(2) Since the supply flow rate of the measurement fluid into the vaporization tank body is determined by the temperature difference between the inside and the outside of the vaporization tank body, the flow rate of the measurement fluid can be increased without a flow rate adjusting means such as a pump or a needle valve. The flow rate can be kept constant, and an inexpensive vaporizer can be obtained.

(3) Since the structure is simple, the vaporizer can be composed of a small number of parts, and an inexpensive vaporizer can be obtained.

(4) Since there is no need to supply a measuring fluid by connecting piping to the vaporizer, parts of a supply system for supplying the measuring fluid are not required, and an inexpensive vaporizer can be obtained.

According to a second aspect of the present invention, in the vaporizer according to the first aspect, a first supply tank provided around the vaporization tank main body and configured to supply a measurement fluid to the vaporization tank main body; A first supply port provided in the supply tank for supplying the measurement fluid to the first supply tank; and a first discharge port provided in the first supply tank for discharging the measurement fluid from the first supply tank. And an outlet.

As a result, (1) Since the first supply tank for supplying the measurement fluid to the vaporization tank main body is provided around the vaporization tank main body, the first supply tank can be freely arranged in a place where the vaporizer is required, and the vaporization can be performed. A vaporizer having no restriction on the installation position of the vessel can be obtained.

(2) Since the first supply tank also functions as a trap, there is no need to provide a separate trap outside, and an inexpensive vaporizer can be obtained.

(3) The vaporizer according to claim 1 is above the inlet and outlet of the measurement fluid and below the gas outlet.
Since the sensor needs to be installed at a position where the liquid level of the measurement fluid comes, it is affected by the liquid level fluctuation of the measurement fluid.

On the other hand, since the first supply tank is provided, the position of the liquid level in the supply tank can be determined by the position of the outlet of the first supply tank. Therefore, a vaporizer which is not affected by the liquid level fluctuation of the measurement fluid can be obtained.

According to a third aspect of the present invention, in the vaporizer according to the first aspect, a second supply tank is provided independently of the vaporization tank main body and supplies a measurement fluid to the vaporization tank main body. This second
A second supply port for supplying the measurement fluid to the supply tank, a second discharge port for discharging the measurement fluid from the second supply tank, and a measurement fluid from the second supply tank into the vaporization tank body. An inflow pipe that communicates the inflow hole with the second supply tank so as to flow in, and the outflow hole and the second hole so that the measurement fluid flows out of the vaporization tank body into the second supply tank. And an outflow pipe communicating with the second supply tank.

As a result, (1) the vaporization tank main body and the second supply tank are provided independently, the contact portion between the vaporization tank main body and the second supply tank is small, and the heat insulating property is good. During the heating of, the heat rarely escapes to the second supply tank,
An energy efficient vaporizer is obtained.

(2) The vaporizer according to claim 1 is above the inlet and outlet of the measuring fluid and below the gas outlet.
Since the sensor needs to be installed at a position where the liquid level of the measurement fluid comes, it is affected by the liquid level fluctuation of the measurement fluid.

On the other hand, since the second supply tank is provided, the position of the liquid level in the supply tank can be determined by the position of the outlet of the second supply tank. Therefore, a vaporizer which is not affected by the liquid level fluctuation of the measurement fluid can be obtained.

According to a fourth aspect of the present invention, in the vaporizer according to any one of the first to third aspects, the temperature of the measurement fluid in the vaporization tank main body is provided in the vaporization tank main body. It is characterized by having a temperature sensor.

As a result, (1) Since the temperature sensor for detecting the temperature of the measurement fluid in the vaporization tank main body is provided, the temperature condition in the vaporization tank main body can be controlled to be constant. A carburetor with strict control of the flow rate is obtained.

According to a fifth aspect of the present invention, in the vaporizer according to any one of the first to fourth aspects, a plurality of the inflow holes are provided.

As a result, (1) a vaporizer having a reduced inflow resistance of the measurement fluid and an improved response speed can be obtained. (2) A vaporizer capable of reducing the influence of the change in the flow velocity or the flow direction of the measurement fluid outside the vaporization tank body can be obtained.

According to a sixth aspect of the present invention, in the vaporizer according to any one of the first to fifth aspects, a plurality of the outflow holes are provided.

As a result, (1) the outflow resistance of the measurement fluid can be reduced, and a vaporizer having an improved response speed can be obtained. (2) The influence of a change in the flow velocity or flow direction of the measurement fluid outside the vaporization tank can be reduced. A carburetor that can be obtained.

According to a seventh aspect of the present invention, in the carburetor according to any one of the first to sixth aspects, a sheathed heater is used as the heater.

As a result, (1) the sheathed heater is commercially available and an inexpensive vaporizer can be obtained. (2) The sheath heater can be easily miniaturized, and a vaporizer that can be easily miniaturized can be obtained.

According to an eighth aspect of the present invention, in the vaporizer according to any one of the first to seventh aspects, a temperature measuring resistor is used as the temperature sensor.

As a result, (1) The resistance temperature detector is commercially available, and an inexpensive vaporizer can be obtained. (2) The resistance thermometer can be easily miniaturized, and a vaporizer that can be easily miniaturized can be obtained. (3) The temperature measuring resistor has high measurement accuracy, and a vaporizer with improved vaporization accuracy can be obtained.

According to a ninth aspect of the present invention, in the vaporizer according to any one of the first to eighth aspects, a temperature measuring means is provided outside the vaporization tank main body and measures a temperature of a measurement fluid. It is characterized by having done.

As a result, (1) when the temperature of the measurement fluid fluctuates, the flow rate of the measurement fluid flowing into the vaporization tank main body can be calculated from the temperature of the measurement fluid and the temperature of the measurement fluid in the vaporization tank main body. A vaporizer capable of correcting the amount of vaporized material is obtained.

(2) The temperature control target value of the vaporization tank main body can be changed according to the temperature of the measurement fluid.

For example, if the measurement fluid is higher than the temperature control target value of the vaporization tank main body, the measurement fluid cannot flow into the vaporization tank main body at all. In such a case, an alarm is issued or the temperature control target value is set. Can be raised.

[0042]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory diagram of a main configuration of an embodiment of the present invention. In the figure, the configuration of the same symbol as FIG. 5 represents the same function. Hereinafter, only differences from FIG. 5 will be described.

In the figure, a heater 12 is provided in a plastic vaporizing tank main body 11 and heats a measurement fluid FLo in the vaporizing tank main body 11. in this case,
As the heater 12, a sheathed heater is used.

The temperature sensor 13 is provided in the vaporization tank main body 11, and detects the temperature of the measurement fluid FLo in the vaporization tank main body 11. In this case, a temperature measuring resistor is used as the temperature sensor 13. In addition, the temperature sensor 13
When the accuracy of vaporization is not required, it may not be necessary.

The inflow hole 14 is provided in the vaporization tank main body 11, and the measurement fluid FLo flows into the vaporization tank main body 11 by thermal convection generated by the measurement fluid FLo heated by the heater 12. It is needless to say that a plurality of inflow holes 14 may be provided.

The outflow hole 15 is provided in the vaporization tank main body 11, and the measurement fluid FLo flows out of the vaporization tank main body 11 by thermal convection generated by the measurement fluid FLo heated by the heater 12. ,

In this case, the vaporizing tank body 11
Is such that the outlet hole 15 is present in the measurement fluid FLo,
The lower side is immersed in the measurement fluid FLo.

The gas inlet 16 is provided in the vaporization tank main body 11 and blows a purge gas into the measurement fluid FLo in the vaporization tank main body 11. The gas outlet 17 is provided in the vaporization tank main body 11 and takes out a purge gas blown into the measurement fluid FLo.

The vaporizer is used in a state where the entire vaporizer is thrown into the open surface A. Open water surface A can be used for rivers, waterways,
It can also be used in such a flow.

Further, as long as the condition that the back pressure of the gas outlet 17 and the pressure inside the vaporization tank main body 11 are substantially equal is satisfied, it can be used not only in the open surface A but also in a closed pipe with a flange or the like.

In the above configuration, the vaporization tank body 11
The measurement fluid FLo inside is heated by the heater 12,
The temperature is measured by the temperature sensor 13. These can be temperature-controlled by a temperature controller or the like, and are kept at a constant temperature, for example, 40 ° C.

At this time, a density difference occurs in the measurement fluid FLo due to a temperature difference between the measurement fluid FLo inside the vaporization tank main body 11 and the measurement fluid FLo outside the vaporization tank main body 11.
Therefore, the measurement fluid FLo flows out of the vaporization tank main body 11 through the outflow hole 15 from inside the vaporization tank main body 11, and
A circulation occurs in which the gas flows from outside the vaporization tank body 11 into the vaporization tank body 11 through the inflow hole 14.

The circulating flow rate is approximately determined by the measurement fluid FL
o, and does not depend on the flow rate of the measurement fluid FLo flowing outside the vaporization tank body 11.

The relationship is, for example, as shown in FIG. In this example, although the circulation flow rate (the supply flow rate into the vaporization tank body 11) is affected by the temperature of the measurement fluid FLo, it is 0.2 l / mi in a water temperature range of 0 to 30 ° C.
It is within the range of n ± 20%, and it can be said that there is a certain degree of accuracy.

In FIG. 2, the horizontal axis is the raw water temperature (゜ C).
T and the horizontal axis show the circulation flow rate (L / min) Q. In the embodiment of FIG. 2, the distance between the inflow hole 14 and the outflow hole 15 is 1 unit.
00 mm, the diameter of the inlet hole 14 and the outlet hole 15 is 9.2 m
m, the temperature inside the vaporization tank body 11 is 40 ° C.

Further, by measuring the temperature of the measurement fluid FLo,
The influence of the flow rate change can also be corrected. The flow rate of the purge air is controlled by a needle valve or the like, and a constant flow rate is supplied from the gas inlet 16 into the vaporization tank body 11.

The air becomes bubbles and rises inside the vaporization tank body 11 and is output from the gas outlet 17.
After passing through a dehumidifier (not shown), it is measured by a detector (gas sensor) (not shown).

As a result, (1) the flow path can be made sufficiently large even at the narrowest inflow hole 14 and outflow hole 15 (for example, a diameter of 9.2 m).
m) Therefore, a vaporizer capable of measuring river water (raw water) without providing a sand filter as a pretreatment without the risk of clogging and flow rate fluctuation is obtained.

Therefore, a vaporizer which can be easily installed even in a place where it is difficult to prepare the washing water for backwashing can be obtained.

(2) Due to the temperature difference between the inside and outside of the vaporization tank body 11, the measurement fluid FL
Since the supply flow rate of o is determined, the flow rate of the measurement fluid FLo can be kept constant without a flow rate adjusting means such as a pump or a needle valve, and an inexpensive vaporizer can be obtained.

(3) Because of the simple configuration, the vaporizer can be composed of a small number of parts, and an inexpensive vaporizer can be obtained.

(4) Since there is no need to connect a pipe to the vaporizer to supply the measurement fluid FLo, components of a supply system for supplying the measurement fluid FLo become unnecessary, and an inexpensive vaporizer can be obtained. .

(5) Measurement fluid F in vaporization tank main body 11
Since the temperature sensor 13 for detecting the temperature of Lo is provided, the temperature condition in the vaporization tank main body 11 can be controlled to be constant, so that a vaporizer capable of strictly controlling the vaporization rate and the flow rate of the measurement fluid FLo can be obtained.

(6) If a plurality of inflow holes 14 are provided, the inflow resistance of the measurement fluid FLo can be reduced, and a vaporizer having an improved response speed can be obtained.

(7) If a plurality of inflow holes 14 are provided, a vaporizer capable of reducing the influence of the change in the flow velocity or the flow direction of the measurement fluid FLo outside the vaporization tank main body 11 can be obtained.

(8) If a plurality of outflow holes 15 are provided, the inflow resistance of the measurement fluid FLo can be reduced, and a vaporizer with an improved response speed can be obtained.

(9) If a plurality of outflow holes 15 are provided, a vaporizer capable of reducing the influence of the change in the flow velocity or the flow direction of the measurement fluid FLo outside the vaporization tank body 11 can be obtained.

(10) Since a sheathed heater is used for the heater 12, the sheathed heater is commercially available and an inexpensive vaporizer can be obtained.

(11) Since a sheathed heater is used for the heater 12, the sheathed heater can be easily reduced in size, and a vaporizer which can be easily reduced in size can be obtained.

(12) Since a resistance temperature detector is used as the thermometer 13, the resistance temperature detector is commercially available and an inexpensive vaporizer can be obtained.

(13) Since a temperature measuring resistor is used as the thermometer 13, the temperature measuring resistor can be easily miniaturized, and a vaporizer that can be easily miniaturized can be obtained.

(14) Since a resistance temperature detector is used as the thermometer 13, a vaporizer having high measurement accuracy and improved vaporization accuracy of the resistance temperature detector can be obtained.

(15) If temperature measuring means for measuring the temperature of the measurement fluid FLo is provided outside the vaporization tank main body 11 and the temperature of the measurement fluid FLo fluctuates, the temperature of the measurement fluid FLo and the temperature of the vaporization tank main body are changed. Measurement fluid F in 11
From the temperature of Lo, the vaporization tank body 11 of the measurement fluid FLo
Since the inflow rate into the gas can be calculated, a vaporizer capable of correcting the amount of volatile substance vaporized can be obtained.

(16) If temperature measuring means for measuring the temperature of the measurement fluid FLo is provided outside the vaporization tank main body 11 and the temperature control target value of the vaporization tank main body 11 is set in accordance with the temperature of the measurement fluid FLo. Can be changed.

For example, if the measurement fluid FLo is higher than the temperature control target value of the vaporization tank main body 11, the measurement fluid FLo cannot flow into the vaporization tank main body 11 at all, but in such a case, an alarm is issued, For example, the temperature control target value can be increased.

FIG. 3 is an explanatory diagram of a main part configuration of another embodiment of the present invention. In the figure, a first supply tank 21 is provided around a vaporization tank main body 11,
Is supplied with the measurement fluid FLo.

In this case, the first supply tank 21 is provided in a double tubular shape around the vaporization tank body 11. It should be noted that the present invention is not limited to the double tubular type.
The supply tank 21 may be spherical, in short, as long as it is provided around the vaporization tank body 11.

The first supply port 22 is provided in the first supply tank 21 and supplies the first supply tank 21 with a measurement fluid. The first outlet 23 is provided in the first supply tank 21, and discharges the measurement fluid FLo from the first supply tank 21.

In the above configuration, the measurement fluid FLo (eg, river water) is supplied at an appropriate flow rate from the first supply port 22 and the measurement fluid FLo is discharged from the first discharge port 23.

The first outlet 23 is connected to the first supply tank 2
1 at the upper part of the side surface, and the measurement fluid F
Since Lo overflows, the position of the water surface is kept almost constant.

Further, since the measurement fluid FLo can freely flow through the inflow hole 14 and the outflow hole 15, the measurement fluid FLo also enters the inside of the vaporization tank body 11. The flow rate of the purge air is controlled by a needle valve or the like, and a constant flow rate is supplied from the gas inlet 16 into the vaporization tank body 11.

The air rises inside the vaporization tank main body 11 as bubbles and is output from the gas outlet 17.
After passing through a dehumidifier (not shown), it is measured by a detector (gas sensor) (not shown).

Now, assuming that there is almost no pressure loss between the dehumidifier (not shown) and the detector (not shown), the vaporization tank body 11 and the first supply tank 21 (ie, inside and outside the cylinder) There is almost no difference in water level.

As a result, (1) Since the first supply tank 21 for supplying the measurement fluid FLo to the vaporization tank main body 11 is provided around the vaporization tank main body 11, the first supply tank 21 can be freely placed in a place where a vaporizer is required. A vaporizer that can be arranged and has no restrictions on the installation position of the vaporizer can be obtained.

(2) Since the first supply tank 21 also serves as a trap, there is no need to provide a separate trap outside, and an inexpensive vaporizer can be obtained.

(3) The evaporator according to claim 1 is a measuring fluid FL
Since the liquid needs to be installed at a position above the inflow hole 14 and the outflow hole 15 and below the gas outlet 17 so that the liquid level of the measurement fluid FLo comes, the liquid level fluctuation of the measurement fluid FLo Affected by

On the other hand, since the first supply tank 21 is provided, the position of the liquid level in the supply tank 21 can be determined by the position of the outlet 23 of the first supply tank 21. Therefore, a vaporizer that is not affected by the liquid level fluctuation of the measurement fluid FLo can be obtained.

In this embodiment, it is conceivable to remove the vaporization tank body 11 and heat the entire supply tank 21. However, it is not practical because the following problems occur.

(1) Normally, the supply tank 21 is
Since the flow rate cannot be reduced due to the risk of Lo clogging or the like, a very large capacity heater 12 is required to heat the whole. (2) It becomes necessary to connect a trap to the drain of the supply tank 21 again.

FIG. 4 is an explanatory view of a main part configuration of another embodiment of the present invention. In the figure, the second supply tank 31 is provided independently of the vaporization tank main body 11,
Is supplied with the measurement fluid FLo.

The second supply port 32 is connected to the second supply tank 3.
1 and the measurement fluid FLo is stored in the second supply tank 31.
Supply. The second outlet 33 is provided in the second supply tank 3.
1 and the measuring fluid FL from the second supply tank 31
Discharge o.

The inflow pipe 34 communicates the inflow hole 14 with the second supply tank 31 so that the measurement fluid FLo flows from the second supply tank 31 into the vaporization tank body 11. The outflow pipe 35 is provided so that the measurement fluid FLo flows out of the vaporization tank body 11 to the second supply tank 31.
The outflow hole 15 communicates with the second supply tank 31.

As a result, (1) since the vaporization tank main body 11 and the second supply tank 31 are provided independently, the contact portion between the vaporization tank main body 11 and the second supply tank 31 is small, and the heat insulation is good. When heating the vaporization tank body 11, heat is supplied to the second supply tank 3.
Thus, a carburetor which is less likely to escape to 1 and has high energy efficiency can be obtained.

(2) The vaporizer according to the first aspect is the measuring fluid FL.
Since it is necessary to set the liquid level of the measurement fluid FLo above the inflow hole 14 and the outflow hole 15 and below the gas outlet 17 so that the liquid level of the measurement fluid FLo comes, to be influenced.

On the other hand, since the second supply tank 31 is provided, the position of the liquid level in the supply tank 31 can be determined by the position of the outlet 33 of the second supply tank 31. Therefore, a vaporizer that is not affected by the liquid level fluctuation of the measurement fluid FLo can be obtained.

In the above-described embodiment, the vaporizer of the present invention has been described as being used, for example, in a volatile substance measuring device for measuring with a gas sensor. However, the present invention is not limited to this. Any vaporizer for separating and vaporizing volatile substances from the fluid may be used.

The foregoing description has been directed only to specific preferred embodiments for purposes of explanation and illustration of the present invention. Therefore, the present invention is not limited to the above-described embodiments, and includes many more modifications without departing from the spirit thereof.
This includes deformation.

[0098]

As described above, according to the first aspect of the present invention,
According to the above, the following effects are obtained. In a vaporizer for separating and vaporizing volatile substances from a measurement fluid, a vaporization tank main body, a heater provided in the vaporization tank main body and heating the measurement fluid in the vaporization tank main body, and a vaporization tank main body. An inflow hole into which the measurement fluid flows into the vaporization tank body by thermal convection generated by the measurement fluid heated by the heater, and the measurement fluid provided in the vaporization tank body and heated by the heater. An outflow hole through which a measurement fluid flows out of the vaporization tank main body due to generated heat convection; a gas injection port provided in the vaporization tank main body to blow a purge gas into the measurement fluid in the vaporization tank main body; A gas outlet provided in the main body to take out the purge gas blown into the measurement fluid, It configures that vaporizer.

As a result, (1) Since the flow path can be made sufficiently large even at the narrowest inflow hole and outflow hole portion of the flow path, there is no fear of clogging and fluctuation in flow rate, and even if a sand filter is not provided as pretreatment. A vaporizer capable of measuring river water (raw water) is obtained. Therefore, a vaporizer which can be easily installed in a place where it is difficult to prepare the washing water for backwashing can be obtained.

(2) Since the supply flow rate of the measurement fluid into the vaporization tank body is determined by the temperature difference between the inside and outside of the vaporization tank body, the flow rate of the measurement fluid can be determined without a flow rate adjusting means such as a pump or a needle valve. The flow rate can be kept constant, and an inexpensive vaporizer can be obtained.

(3) Since the structure is simple, the vaporizer can be composed of a small number of parts, and an inexpensive vaporizer can be obtained.

(4) Since there is no need to connect a pipe to the vaporizer to supply the measurement fluid, components of a supply system for supplying the measurement fluid are not required, and an inexpensive vaporizer can be obtained.

According to the second aspect of the present invention, the following effects can be obtained. A first supply tank provided around the vaporization tank body and supplying a measurement fluid to the vaporization tank body, and a first supply tank provided in the first supply tank and supplying a measurement fluid to the first supply tank. 2. The vaporizer according to claim 1, further comprising a supply port, and a first discharge port provided in the first supply tank and discharging the measurement fluid from the first supply tank.

As a result, (1) Since the first supply tank for supplying the measurement fluid to the vaporization tank main body is provided around the vaporization tank main body, the first supply tank can be freely disposed in a place where the vaporizer is required, and the vaporization can be performed. A vaporizer having no restriction on the installation position of the vessel can be obtained.

(2) Since the first supply tank also functions as a trap, there is no need to provide a separate trap outside, and an inexpensive vaporizer can be obtained.

(3) The vaporizer according to claim 1 is above the inlet and outlet of the measurement fluid and below the gas outlet.
Since the sensor needs to be installed at a position where the liquid level of the measurement fluid comes, it is affected by the liquid level fluctuation of the measurement fluid.

On the other hand, since the first supply tank is provided, the position of the liquid level in the supply tank can be determined by the position of the outlet of the first supply tank. Therefore, a vaporizer which is not affected by the liquid level fluctuation of the measurement fluid can be obtained.

According to the third aspect of the present invention, the following effects can be obtained. A second supply tank provided independently of the vaporization tank body and supplying a measurement fluid to the vaporization tank body, and a second supply tank provided in the second supply tank and supplying the measurement fluid to the second supply tank. A supply port, a second discharge port provided in the second supply tank for discharging the measurement fluid from the second supply tank, and a measurement fluid flowing into the vaporization tank main body from the second supply tank. An inflow pipe communicating the inflow hole with the second supply tank so that the measurement fluid flows out of the vaporization tank main body to the second supply tank. 2. The vaporizer according to claim 1, further comprising an outflow pipe communicating with the supply tank. .

As a result, (1) the vaporization tank main body and the second supply tank are provided independently, the contact portion between the vaporization tank main body and the second supply tank is small, and the heat insulating property is good. During the heating of, the heat rarely escapes to the second supply tank,
An energy efficient vaporizer is obtained.

(2) The vaporizer according to claim 1 is above the inlet and outlet of the measurement fluid and below the gas outlet.
Since the sensor needs to be installed at a position where the liquid level of the measurement fluid comes, it is affected by the liquid level fluctuation of the measurement fluid.

On the other hand, since the second supply tank is provided, the position of the liquid level in the supply tank can be determined by the position of the outlet of the second supply tank. Therefore, a vaporizer which is not affected by the liquid level fluctuation of the measurement fluid can be obtained.

According to the fourth aspect of the present invention, the following effects can be obtained. 4. The vaporizer according to claim 1, further comprising a temperature sensor provided in the vaporization tank main body and configured to detect a temperature of the measurement fluid in the vaporization tank main body.

As a result, (1) Since the temperature sensor for detecting the temperature of the measurement fluid in the vaporization tank body is provided, the temperature condition in the vaporization tank body can be controlled to be constant, so that the vaporization rate and the measurement fluid A carburetor with strict control of the flow rate is obtained.

According to the fifth aspect of the present invention, the following effects can be obtained. The vaporizer according to any one of claims 1 to 4, wherein a plurality of the inflow holes are provided.

As a result, (1) a vaporizer having a reduced inflow resistance of the measurement fluid and an improved response speed can be obtained. (2) A vaporizer capable of reducing the influence of the change in the flow velocity or the flow direction of the measurement fluid outside the vaporization tank body can be obtained.

According to the sixth aspect of the present invention, the following effects can be obtained. The vaporizer according to any one of claims 1 to 5, wherein a plurality of the outflow holes are provided.

As a result, (1) the outflow resistance of the measurement fluid can be reduced, and a vaporizer having an improved response speed can be obtained. (2) The influence of the change in the flow velocity and the flow direction of the measurement fluid outside the vaporization tank can be reduced. A carburetor that can be obtained.

According to the seventh aspect of the present invention, the following effects can be obtained. The vaporizer according to any one of claims 1 to 6, wherein a sheathed heater is used as the heater.

As a result, (1) the sheathed heater is commercially available and an inexpensive vaporizer can be obtained. (2) The sheath heater can be easily miniaturized, and a vaporizer that can be easily miniaturized can be obtained.

According to the eighth aspect of the present invention, the following effects can be obtained. The vaporizer according to any one of claims 1 to 7, wherein a temperature measuring resistor is used as the thermometer.

As a result, (1) The resistance temperature detector is commercially available and an inexpensive vaporizer can be obtained. (2) The resistance thermometer can be easily miniaturized, and a vaporizer that can be easily miniaturized can be obtained. (3) The temperature measuring resistor has high measurement accuracy, and a vaporizer with improved vaporization accuracy can be obtained.

According to the ninth aspect of the present invention, the following effects can be obtained. The vaporizer according to any one of claims 1 to 8, further comprising a temperature measuring unit installed outside the vaporization tank main body to measure a temperature of a measurement fluid.

As a result, (1) when the temperature of the measurement fluid fluctuates, the flow rate of the measurement fluid flowing into the vaporization tank main body can be calculated from the temperature of the measurement fluid and the temperature of the measurement fluid in the vaporization tank main body. A vaporizer capable of correcting the amount of vaporized material is obtained.

(2) The temperature control target value of the vaporization tank main body can be changed according to the temperature of the measurement fluid. For example, if the measurement fluid is higher than the temperature control target value of the vaporization tank main body, the measurement fluid cannot flow into the vaporization tank main body at all, but in such a case, an alarm is issued or the temperature control target value is increased. Or you can.

Therefore, according to the present invention, a simple and inexpensive vaporizer can be realized without requiring a washing facility for backwashing.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a main part configuration of an embodiment of the present invention.

FIG. 2 is an operation explanatory diagram of FIG. 1;

FIG. 3 is an explanatory diagram of a main part configuration of another embodiment of the present invention.

FIG. 4 is an explanatory view of a main part configuration of another embodiment of the present invention.

FIG. 5 is an explanatory view of a configuration of a main part of a conventional example generally used from the past.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Vaporization tank main body 12 Heater 13 Temperature sensor 14 Inlet 15 Outlet 16 Gas inlet 17 Gas outlet 21 First supply tank 22 First supply port 22 23 First discharge port 31 Second supply tank 32 First 2nd supply port 22 33 Third discharge port 34 Inflow pipe 35 Outflow pipe A Open water surface FLo Measurement fluid

Claims (9)

[Claims] 1. A vaporizer for separating and vaporizing a volatile substance from a measurement fluid, comprising: a vaporization tank main body; a heater provided in the vaporization tank main body for heating the measurement fluid in the vaporization tank main body; An inflow hole provided in the vaporization tank main body, through which a measurement fluid flows into the vaporization tank main body due to thermal convection generated by the measurement fluid heated by the heater; and an inflow hole provided in the vaporization tank main body and heated by the heater. An outlet through which the measurement fluid flows out of the vaporization tank main body due to thermal convection generated by the measurement fluid; and a gas inlet provided in the vaporization tank main body and for blowing a purge gas into the measurement fluid in the vaporization tank main body. And a gas outlet provided in the vaporization tank main body to take out the purge gas blown into the measurement fluid. Vaporizer characterized by the fact. 2. A first supply tank provided around the vaporization tank main body to supply a measurement fluid to the vaporization tank main body, and a measurement fluid is supplied to the first supply tank and supplied to the first supply tank. The vaporizer according to claim 1, further comprising a first supply port for supplying, and a first discharge port provided in the first supply tank and configured to discharge the measurement fluid from the first supply tank. vessel. 3. A second supply tank which is provided independently of the vaporization tank body and supplies a measurement fluid to the vaporization tank body; and a second supply tank provided in the second supply tank and supplies a measurement fluid to the second supply tank. A second supply port for supplying; a second discharge port provided in the second supply tank for discharging the measurement fluid from the second supply tank; and a second supply port for supplying the measurement fluid from the second supply tank into the vaporization tank body. An inflow pipe communicating the inflow hole with the second supply tank so that the measurement fluid flows therein; and the outflow hole so that the measurement fluid flows out of the vaporization tank body into the second supply tank. 2. The vaporizer according to claim 1, further comprising an outflow pipe that communicates with the second supply tank. 4. The vaporization device according to claim 1, further comprising a temperature sensor provided on the vaporization tank main body and detecting a temperature of the measurement fluid in the vaporization tank main body. vessel. 5. The vaporizer according to claim 1, wherein a plurality of the inflow holes are provided. 6. The vaporizer according to claim 1, wherein a plurality of the outlet holes are provided. 7. A vaporizer according to claim 1, wherein a sheathed heater is used as said heater. 8. A vaporizer according to claim 1, wherein a temperature measuring resistor is used as said temperature sensor. 9. The vaporizer according to claim 1, further comprising a temperature measuring unit installed outside the vaporization tank main body to measure a temperature of a measurement fluid.