JP4274828B2 - Gas generator and gas detector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a gas generator for supplying a gas for inspection to a gas detection device provided with a drain recovery part for draining water, and a drain recovery part for draining water in a gas circulation part. The present invention relates to a gas detection device in which a gas detection unit including a gas detection element capable of detecting a combustible gas is provided on the downstream side of a recovery unit.
[0002]
[Prior art]
In general, flammable gases include methane and other production gases that supply flammable gases, exhaust gas that accompanies incomplete combustion of combustion equipment, and drying to volatilize and dry flammable gases as solvents. There are furnace exhaust gas. In such a gas, there are cases where the concentration of combustible gas contained in the gas is monitored for the purpose of detecting the combustion efficiency, incomplete combustion, and the degree of drying (see Patent Document 1). In a pipeline that needs to monitor a gas containing a combustible gas, sufficient attention is paid to the fire so as not to ignite the combustible gas. Therefore, it is necessary to sufficiently monitor the closed state of the pipeline.
When such a pipeline is monitored, a gas detector is usually interposed in the pipeline so that the properties of the flowing gas can be inspected and the clogging of the pipeline is regularly checked. ing.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-13990
[Problems to be solved by the invention]
The gas detection element provided in the gas detection device is deteriorated by the flowing gas, and the combustible gas cannot be monitored accurately, or the property of the flowing exhaust gas is deteriorated. In order to surely avoid inconveniences such as the above, it is necessary to perform the above-described inspection work more reliably.
However, since such inspection work often requires a great deal of labor and time, it is desired to further improve the efficiency.
[0005]
Accordingly, an object of the present invention is to provide a technique for simply and surely checking the normal operation of a gas detection device and the presence or absence of blockage of a pipeline in view of the above-mentioned drawbacks.
[0006]
[Means for Solving the Problems]
Therefore, the present inventors provide a gas generator for inspecting the gas detection device in the pipe, and enable the inspection gas to flow through the pipe. It is considered that the normal operation of the gas detection device can be confirmed by detecting the presence or absence of blockage of the gas and detecting the inspection gas.
That is, the characteristic configuration of the gas generator of the present invention for achieving this object is as follows:
In order to supply the inspection gas to the gas detection device provided with the drain recovery part for draining water, a storage part capable of storing the vaporization liquid is provided, and the vaporization liquid is vaporized adjacent to the storage part. A vaporizing part to be provided; a capillary part for sucking up the vaporizing liquid from the storage part to the vaporizing part; a developing part for deploying the vaporizing liquid sucked from the capillary part in the vaporizing part; A generator body provided with an introduction part and an exhaust part for introducing and discharging air,
The vaporization liquid mainly containing isooctane is accommodated in the storage part.
[0007]
The characteristic configuration of the gas detection device of the present invention is as follows.
A gas recovery unit is provided with a drain recovery unit for draining water, and a gas detection unit configured to be able to detect a combustible gas downstream of the drain recovery unit,
The gas generator described above is provided at the inlet side of the gas circulation part so as to be able to supply inspection gas.
[0008]
[Function and effect]
In other words, a storage unit that can store the vaporization liquid is provided, and a vaporization unit that vaporizes the vaporization liquid is provided adjacent to the storage unit, so that the vaporization liquid stored in the storage unit is stored in the vaporization unit. Specifically, if a capillary part that sucks up the liquid for vaporization from the storage part to the vaporization part is provided, and an introduction part and a discharge part for introducing and discharging air to the vaporization part are provided, The vaporization liquid in the storage part is sucked into the vaporization part little by little, and the vapor-liquid contact area is increased to promote the vaporization of the air introduced from the introduction part and the vaporization liquid, and the vaporization liquid is vaporized. Therefore, vaporization of the vaporizing liquid is further promoted, and a suction force of the vaporizing liquid is generated in the capillary tube to continuously promote vaporization of the vaporizing liquid. .
[0009]
Further, if there is provided a developing part for expanding the vaporizing liquid sucked up from the capillary part in the vaporizing part, the vaporizing liquid is oozed into the developing part, and the gas-liquid of the vaporizing liquid and air The contact area can be further increased. As a result, vaporizing liquids that normally have a high boiling point and have a low saturated vapor pressure are less likely to vaporize and are not suitable for inspection gas. Can now be used.
[0010]
Therefore, if a vaporizing liquid containing isooctane as a main component is stored in the reservoir, isooctane has a boiling point of 98 ° C., which is close to water and is usually difficult to vaporize. It can be vaporized and discharged from the discharge part. Moreover, since the said isooctane has few explosive properties, even if it uses it for the related equipment of a fire using apparatus, its safety is high. Alcohols are conceivable as the same inspection gas, but the alcohols are usually water-soluble, and are recovered in the drain recovery unit together with water vapor contained in the gas. On the other hand, since the isooctane is insoluble in water, the inconvenience that the isooctane is recovered in the drain recovery part is less likely to occur. Therefore, according to the gas generator, it is possible to easily generate and supply the inspection gas that can inspect the gas detection device provided with the drain recovery part for draining water.
[0011]
When the gas for inspection is vaporized by the gas generator and supplied to the gas distribution part inlet side of the gas detector, the gas for inspection flows well along the pipeline of the gas detector, Reach the gas detector of the gas detector. Here, when isooctane is detected in the gas detection unit, the gas detection unit or the like is operating normally in the gas detection unit, and the pipeline in the gas detection device is normally distributed. Are confirmed at the same time. Therefore, if the gas generator is provided on the gas circulation part inlet side of the gas detection device so that inspection gas can be supplied freely, the normal operation of the gas detection device and the closed state of the pipe line can be surely confirmed. It is now possible to check whether the gas detector can be used safely.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the gas detection device of the present invention includes a supply unit 1 that supplies exhaust gas from a painting booth A. The exhaust gas supplied to the supply unit 1 is supplied to a drain recovery unit 2 for draining water. The gas distribution part 4 led to the gas detection part 3 is provided.
[0013]
Between the drain recovery part 2 and the gas detection part 3 of the gas circulation part 4, a flow checker 5 for displaying the flow rate of the gas to be circulated and a flow rate detection part 6 for detecting the gas flow rate are provided, and the gas The gas flow circulated by the gas flow pump 7 provided on the downstream side of the detection unit 3 is adjusted by the needle valve 8 to maintain a predetermined gas flow rate. A membrane filter 9 for removing dust contained in the gas is provided on the upstream side of the flow rate detection unit 6.
[0014]
The gas detection unit 3 is provided with a semiconductor gas detection element, and the gas detection element can detect a combustible gas. In general, the semiconductor gas detection element is sensitive to water droplets, but the drain recovery unit 2 and the membrane filter 9 can detect flammable gas with high accuracy in an environment where water droplets are hardly generated.
[0015]
As shown in FIG. 2, the gas generator 10 according to the present invention is provided with an inner lid 12 in the generator main body 11, and a storage section 13 that stores isooctane as a vaporizing liquid in a space below the inner lid 12. The space above the inner lid 12 is formed in the vaporizing section 14 for vaporizing the isooctane. The inner lid 12 is provided with a hole 12a to allow the reservoir 13 and the vaporizer 14 to communicate with each other, and a rod-like felt is vertically inserted into the hole 12a so as to be stored in the reservoir 13 Is provided with a capillary portion 15 that sucks the gas into the vaporizing portion by capillary action. The inner lid 12 is provided with a developing portion 16 that spreads cotton and deploys isooctane sucked up from the capillary portion 15. The generator body 11 is screwed with a lid member 17 provided with an introduction portion 17a and an exhaust portion 17b for introducing and discharging air into the vaporizing portion 14, and the introduction portion 17a and the discharge portion are connected to the generator body 11. The inside of the generator body 11 is hermetically sealed while forming the air 17b, and the air is allowed to flow through the vaporizing portion 14 inside the generator body 11.
[0016]
As a result, when air is supplied to the introduction part 17a of the gas generator 10, the isooctane in the storage part 13 is sucked into the vaporization part 14 by the capillary part 15, vaporized into the circulating air, and mixed with the air. Inspection gas can be generated and supplied.
In addition, the developing unit 16 sucks the vaporization liquid in the storage unit 13 into the vaporization unit 14 little by little, and increases the gas-liquid contact area, thereby making contact between the air introduced from the introduction unit 17a and the isooctane. Since vaporization is promoted and isooctane is vaporized and discharged from the discharge part 17b, vaporization of isooctane is further promoted and a suction force of isooctane is generated in the capillary part 15 to continuously inspect the gas. Can be supplied.
[0017]
The gas generator 10 is provided in an inspection gas supply path 20, and an inspection gas supply pump 21 for supplying air is provided on the upstream side of the gas generator 10 in the inspection gas supply path 20. Further, a three-way solenoid valve 22 is provided on the upstream side of the gas generator 10, and an inspection gas generation state in which the air supplied by the inspection gas supply pump 21 passes through the gas generator 10, and the gas generator 10 It is possible to switch to an air supply state that does not pass through. In addition, a two-way solenoid valve 23 is provided on the downstream side of the gas generator 10 so that the two-way solenoid valve 23 is closed so that the gas supply to the inspection gas supply passage 20 can be stopped, and a flow meter 24 is provided so that the gas flow rate can be monitored and adjusted. The inspection gas supplied from the gas generator 10 is supplied to the gas supply unit 1 upstream of the gas circulation unit 4.
[0018]
This gas detection device is inspected every time the painting booth A is activated. When the painting booth A is activated, the three-way solenoid valve 22 is first brought into the inspection gas generation state, and the two-way solenoid valve 23 is supplied with gas. Then, the inspection gas supply pump 21 is operated to distribute the inspection gas from the inspection gas supply path 20 to the gas distribution unit 4.
Next, when an output by the inspection gas is obtained in the gas detection unit 3, the three-way electromagnetic valve 22 is set in an air supply state while the two-way electromagnetic valve 23 is kept in a gas supply state, Continue air supply.
As a result, when it is considered that all the inspection gas supplied into the gas circulation section 4 has been exhausted, the inspection gas supply pump 21 is stopped, and the two-way solenoid valve 23 is set in a gas supply stop state. The exhaust gas from the coating booth A is circulated in the gas circulation part 4 by operating the gas circulation pump 21.
[0019]
In the previous embodiment, the generator main body was partitioned by the inner lid to form the storage part and the vaporization part. However, the present invention is not limited to this form, and two containers may be connected to form the storage part and the vaporization part. It is good, and the inside of one container can also be constituted by the storage part in which liquid isooctane is stored, and the vaporization part which consists of the other space. In the case of providing an inner lid, the vaporization section and the storage section can be clearly distinguished from each other, and a stable inspection gas supply is possible, and the capillary section and the deployment section can be easily installed. There is.
Further, the application target of the gas detection device is not limited to the painting booth, and may be a combustion furnace, a drying furnace, etc. Further, the inspection gas supply operation of the gas generator is also adapted to the application target device. It can be set appropriately.
[Brief description of the drawings]
[Fig. 1] Schematic diagram of gas detector [Fig. 2] Schematic diagram of inspection gas generator [Explanation of symbols]
2 Drain recovery part 13 Storage part 14 Vaporization part 15 Capillary part 16 Deployment part 17a Introduction part 17b Discharge part 11 Generator body

Claims (2)

A gas generator for supplying an inspection gas to a gas detector provided with a drain recovery part for draining water,
Providing a reservoir capable of containing a vaporizing liquid; providing a vaporizing part for vaporizing the vaporizing liquid adjacent to the reservoir; providing a capillary part for sucking up the vaporizing liquid from the reservoir to the vaporizing part; Provided in the vaporization part a deployment part for deploying the liquid for vaporization sucked up from the capillary part, provided with a generator body provided with an introduction part and a discharge part for introducing and discharging air into the vaporization part,
A gas generator in which a vaporizing liquid mainly composed of isooctane is accommodated in the reservoir. A gas detection device provided with a drain recovery part for draining water in a gas circulation part, and provided with a gas detection part configured to detect flammable gas downstream of the drain recovery part,
A gas detector, wherein the gas generator according to claim 1 is provided on the inlet side of the gas circulation part so as to be able to supply inspection gas.

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