KR20200056222A - Apparatus to measure gas and method to clean thereof - Google Patents

Abstract

A gas measuring apparatus that may be washed according to an embodiment of the present invention may include: a gas sensor disposed in a connection pipe to detect a degree of contamination of a sample gas, which is introduced through an introduction part of the connection pipe; a pump disposed at a rear side of the gas sensor in the connection pipe to generate a flow of the gas in the connection pipe; a plurality of valves disposed in the connection pipe to adjust the direction of the flow of the gas; a pre-treating collection part disposed at the introduction part of the connection pipe to collect vapor and dust included in the sample gas; an adsorption part connected to the connection pipe to wash the interior of the connection pipe, the gas sensor, and the valves by suctioning air from the outside and introducing the suctioned air into the connection pipe to form a gas flow in a reverse direction; and a valve adjusting part that selectively adjusts opening/closing operations of the plurality of valves. Accordingly, the maintenance costs for the apparatus can be reduced and stability can be increased.

Description

Gas measuring device and its cleaning method {APPARATUS TO MEASURE GAS AND METHOD TO CLEAN THEREOF}

The present invention relates to a gas measuring device and a cleaning method thereof, and more specifically, it is possible to improve the accuracy of the measurement result by cleaning each component including the connection pipe, valves and gas sensor by a backwashing method. The present invention relates to a gas measuring device and a cleaning method capable of removing moisture or dust or the like contained in a gas by a pre-treatment collecting part to prevent adverse effects such as moisture condensation.

In general, various types of gas sensors have been developed and used, including sensors for detecting gases harmful to the human body and sensors for measuring odor. There are various types of gas measurement sensors depending on the type of gas to be measured or the environment of use by the gas sensor. According to one classification criterion, it can be divided into a case where cleaning is required and a case where it is not. Here, the washing refers to a function of flowing clean air to keep the part concerned with contamination by the sample clean.

For example, as an example of a city gas sensor, a city gas sensor is obliged to be installed in a place where city gas is used. When the city gas detection sensor detects a leak of city gas, the shut-off valve is configured to operate. In this case, the gas sensor is always in contact with the clean air, so it can easily react when leaking city gas.

In other words, since the existing city gas detection sensor is in contact with the clean air most of the time, there is no major obstacle without managing the sensor contamination.

However, in the case of a gas sensor installed at a point where various pollutants come out, there is a possibility that contamination occurs in the gas sensor, the connecting pipe through which the sample flows, and the valve controlling the sample flow because it is in contact with the contaminated air. Therefore, in the case of a gas sensor installed at a point with a high degree of contamination, such as a pollutant discharge port, the inside of the tube may be contaminated even if a sample with a low concentration to be measured is inhaled, because the inside of the intake tube, the valve, and the sensor may be contaminated without cleaning Accurate measurement may not be performed due to contamination of the valve and the sensor itself. For this reason, the life of the gas sensor may be shortened.

On the other hand, when using a gas sensor to monitor air pollutants and odor pollutant discharge facilities, when the water vapor is less than about 80 percent (relative humidity), the application number 10-2016 filed by the applicant Although reliable monitoring was possible by the "backwashing method of gas sensor suction pipe" of -0024403, the effect of high water vapor can directly affect the gas sensor, for example, when the water vapor in the air is 80% or more.

In particular, water vapor accumulates in the water trap space for a certain period of time. If the water is not discharged, air pollutants and odor pollutants may be absorbed into the water in the water trap, thereby lowering the concentration of exhaust gas. Monitoring can be limited.

Accordingly, there is a need for a method of cleaning a gas sensor measuring device having a new configuration that enables objective monitoring of gas concentration even in a facility with high water vapor.

As a related prior art, there is Republic of Korea Patent Publication No. 10-2014-0093878 (invention name: gas pollution concentration measuring device and measuring method thereof, publication date: July 29, 2014).

Embodiments of the present invention, by cleaning the respective components, including the connection pipe, valves and gas sensor by a backwashing method can improve the accuracy of the measurement results, and also included in the gas by the pre-treatment capture unit A gas measuring device that can remove moisture or dust as much as possible to prevent the connector or other components from being adversely affected by moisture, such as condensation, thereby reducing the maintenance cost of the device and increasing stability. And cleaning methods thereof.

The problem to be solved by the present invention is not limited to the problem (s) mentioned above, and another problem (s) not mentioned will be clearly understood by those skilled in the art from the following description.

Washable gas measuring apparatus according to an embodiment of the present invention, the gas sensor interposed in the connecting pipe to detect the degree of contamination of the sample gas flowing through the inlet portion of the connecting pipe, and interposed in the rear end of the gas sensor in the connecting pipe Pump to generate a flow of gas in the connection pipe is interposed in the connection pipe and a plurality of valves for adjusting the flow direction of the gas in accordance with the opening and closing operation, interposed in the inlet portion of the connection pipe to the sample gas A pre-processing collecting part for collecting the contained water vapor and dust, and connected to the connecting pipe, and inhaling air from outside to introduce the inhaled air into the connecting pipe to form a gas flow in the reverse direction, thereby forming the gas flow in the connecting pipe, the gas A sensor and an adsorption unit for cleaning the valve, and a valve adjustment unit for selectively adjusting opening and closing of each of the plurality of valves may be included.

In addition, each of the plurality of valves according to an embodiment of the present invention is a three-way valve, and along the connecting pipe, the pre-treatment collection unit, the gas sensor, the first valve and the second valve and the adsorption among the plurality of valves The additional valve is connected in series, the third valve of the pump and the plurality of valves is connected to the branch connector branched from the second valve, and the third valve is connected by the first valve and the circulation connector, By the selective adjustment of the plurality of valves by the valve control unit, the sample tube is measured by the gas sensor or the air introduced through the adsorption unit flows in the reverse direction through the connection tube, the connection tube, The pre-treatment collection unit, the gas sensor, and the plurality of valves may be cleaned.

In addition, when measuring the degree of contamination of the sample gas by the gas sensor according to an embodiment of the present invention, the first valve is opened in the direction of the second valve by the valve adjusting unit, and the second valve is the pump Open in the direction, the sample gas may be discharged through the third valve.

In addition, when the connection pipe, the pre-treatment collection part, the gas sensor and the plurality of valves according to an embodiment of the present invention are cleaned, the second valve is opened toward the pump and the adsorption part, and the third valve Is opened in the direction of the first valve, and the first valve is opened in the direction of the gas sensor, so that air introduced through the adsorption unit flows in the reverse direction through the connection pipe.

In addition, when the air introduced through the adsorption unit according to an embodiment of the present invention passes through the pretreatment collection unit, an outlet provided in the pretreatment collection unit is opened to discharge moisture or dust collected in the pretreatment collection unit to the outside. Can be.

In addition, the cleaning method of the gas measuring apparatus according to an embodiment of the present invention, the air inlet step of introducing external air through the adsorption unit into the interior of the connector; And washing the connection pipe, the pre-treatment collection part, the gas sensor, and the plurality of valves by operating the pump to flow the air introduced by the air introduction step in the reverse direction from the connection pipe. can do.

In addition, each of the plurality of valves according to an embodiment of the present invention is a three-way valve, and along the connecting pipe, the pre-treatment collection unit, the gas sensor, the first valve and the second valve and the adsorption among the plurality of valves The additional valve is connected in series, the third valve of the pump and the plurality of valves is connected to the branch connector branched from the second valve, and the third valve is connected by the first valve and the circulation connector, During the washing step, the second valve is opened in the direction of the pump and the adsorption unit, the third valve is opened in the direction of the first valve, and the first valve is opened in the direction of the gas sensor, so that the adsorption Air introduced through the portion may flow in the reverse direction through the connecting pipe.

In addition, in the washing step according to an embodiment of the present invention, when the air introduced through the adsorption unit passes through the pretreatment collection unit, the outlet provided in the pretreatment collection unit is opened, and the moisture collected in the pretreatment collection unit or Dust can be discharged to the outside.

According to an embodiment of the present invention, each component including the connecting pipe, valves, and gas sensor can be cleaned by a backwashing method, thereby improving accuracy of measurement results and increasing the life of the device. .

In addition, it is possible to remove the moisture or dust that can be contained in the gas by the pre-treatment collecting part, to prevent the connector or other components from being adversely affected by moisture such as condensation, thus reducing the maintenance cost of the device. Can improve the stability. .

1 is a view schematically showing a state when a sample gas is measured by a gas sensor in a washable gas measurement apparatus according to an embodiment of the present invention.
FIG. 2 is a view schematically showing a state when washing each component of the gas measuring device of FIG. 1.
FIG. 3 is a graph showing monitoring results when the pre-treatment collection unit is not applied in the gas measurement device of FIG. 1.
4 is a graph showing the monitoring result when the pre-treatment capture unit is installed in the gas measuring device of FIG. 1 but the backwashing method is applied or not.
5 is a graph showing monitoring results according to the gas measuring device of FIG. 1.

Advantages and / or features of the present invention and methods for achieving them will become apparent by referring to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the present embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains. It is provided to completely inform the person having the scope of the invention, and the present invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view schematically showing a state when a sample gas is measured by a gas sensor in a washable gas measurement apparatus according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating each configuration of the gas measurement apparatus of FIG. 1. It is a diagram schematically showing a state when washing.

As shown in these drawings, the gas measuring apparatus 100 according to an embodiment of the present invention measures the degree of contamination of, for example, a sample gas, as well as gas that can be cleaned by each backwashing method. As a device 100, a gas sensor 130 interposed in the connection pipe 110 and measuring the degree of contamination of the sample gas flowing through the inflow portion of the connection pipe 110, and the gas in the connection pipe 110 Pump 170 for generating a flow of flow, and a plurality of valves (140, 150, 160) interposed throughout the connection pipe (110) to control the direction of gas according to the opening and closing operation, and the inflow portion of the connection pipe (110) A pre-treatment collection unit 120 installed in the gas to collect moisture (water vapor) and dust contained in the gas, and an adsorption unit 180 that sucks outside air and filters it into clean air to provide clean external air to the above components And, may include a valve control unit (not shown) for selectively adjusting the opening and closing of each of the plurality of valves (140, 150, 160).

With this configuration, as shown in FIG. 1, it is possible to accurately detect the degree of contamination of the surrounding gas, but it is possible to prevent each configuration from being contaminated by contaminants contained in the gas by a backwashing method. 130) In addition, it is possible to reliably maintain each configuration.

In particular, the gas sensor 130 or valve by moisture or dust or the like by having a structure in which moisture and dust having a relative humidity of about 80% or more contained in the exhaust gas of the discharge facility are collected in the pre-treatment collection unit 120 to be described later. (140, 150, 160) can be prevented from adversely affecting the like, it is possible to improve the accuracy of the measurement as well as extend the life of the device compared to the prior art.

When describing each configuration, first, the above-described respective configurations are interposed in the connector 110 of the present embodiment, and have a structure that is branched and circulated by the valves 140, 150, and 160. Referring to Figure 1, the inlet of the connector 110 is toward the outlet or the general atmosphere 101, the inlet portion of the connector 110, for example, moisture or dust from the sample gas flowing through the outlet or the general atmosphere A pre-treatment collecting unit 120 for removing the may be provided.

Here, the plurality of valves 140, 150, and 160 are three-way valves, and may include a first valve 140, a second valve 150, and a third valve 160.

More specifically, the pre-treatment collection unit 120, the gas sensor 130, the first valve 140 and the second valve 150 and the adsorption unit 180 along the connection pipe 110 capable of gas flow are It may be connected in series, the pump 170 and the third valve 160 may be connected to the branch connection pipe 110a branched from the second valve 150. The third valve 160 is connected to the first valve 140 and another circulation connection pipe 110b to allow gas to flow in a selected direction according to the operation of the valve.

Incidentally, the measurement of the degree of contamination of the sample gas by the gas sensor 130 may be made by selectively adjusting the plurality of valves 140, 150, and 160 by the valve control unit. On the other hand, the air introduced through the adsorption unit 180 flows in the reverse direction through the connection pipe 110, so that the interior of the connection pipe 110, the pre-treatment collection portion 120, the gas sensor 130, and a plurality of valves 140, 150, 160).

Referring to Figure 1, when measuring the degree of contamination of the sample gas by the gas sensor 130, first, the plurality of valves (140, 150, 160) are respectively controlled by the valve control unit, the first valve (140) The direction toward the second valve 150 and the gas sensor 130 may be opened and closed upward. The direction of the second valve 150 toward the first valve 140 and the pump 170 may be opened and the right direction may be blocked. The third valve 160 may open in a direction toward the pump 170 and the outlet and be blocked upward.

In such a valve state, when the pump 170 is operated to generate a gas flow in a forward direction (in the direction of the outlet connected to the third valve 160 from the inlet of the connector 110), it flows through the inlet of the connector 110 The sample gas can be discharged to the outlet through the above-described configuration.

That is, the sample gas is first collected by passing through the pre-treatment collection unit 120, and moisture and dust are collected, and the degree of contamination is measured through the gas sensor 130 and then discharged to the outside.

As described above, in the conventional case, when the humidity of the outlet of the exhaust facility is high or the temperature difference between inside and outside is large, a phenomenon that moisture condenses may occur when the sample gas passes through the connection pipe 110, but in the present embodiment, pre-treatment Since the collecting unit 120 collects and reduces moisture and dust from the gas introduced first, it is possible to prevent moisture condensation from occurring.

On the other hand, as shown in FIG. 2, not only can each component of the gas measuring device 100 of the present embodiment be cleaned by a backwashing method, which will be described later, but also discharges moisture or dust collected in the pretreatment collecting unit 120. Can be.

Even in this case, first, opening and closing of each of the valves 140, 150, and 160 is selectively controlled by the valve control unit so that external air flowing through the adsorption unit 180 flows in the reverse direction of the connection pipe 110. First, the second valve 150 is opened in the direction of the pump 170 and the adsorption unit 180, and the left direction is blocked.

The third valve 160 is opened in the first valve 140 direction and the pump 170 direction, and is blocked in the outlet direction. And the first valve 140 is opened in the direction of the third valve 160 and the gas sensor 130 and is blocked in the direction of the second valve 150.

When the pump 170 is operated in such a valve state to generate a reverse gas flow, clean air introduced through the adsorption unit 180 and water and dust removed from the adsorption unit 180 is connected through the above-described configurations. It may be discharged to the inlet of the tube 110.

That is, clean air that has passed through the adsorption unit 180 first washes the second valve 150, then washes the pump 170 and the third valve 160, then washes the first valve 140 and then The gas sensor 130 can be cleaned. In addition, it is possible to wash the inside of the connector 110 while flowing in the connector 110 in the reverse direction.

In addition, while passing through the pre-treatment collection unit 120, the pre-treatment collection unit 120 is washed, and at the same time, water or dust collected in the pre-treatment collection unit 120 is discharged through the outlet 121 provided in the pre-treatment collection unit 120. Can be discharged. That is, when the washing operation is performed, the outlet 121 provided in the pretreatment collection unit 120 is kept open, and at this time, clean air flowing in the reverse direction passes through the pretreatment collection unit 120 to remove moisture and dust. By pushing out, moisture dust or the like can be discharged through the open outlet.

In addition, clean air flowing in the reverse direction through the connection pipe 110 is discharged through the inlet of the connection pipe 110 connected to the pretreatment collection part 120 to cleanly clean the inlet portion of the connection pipe 110.

Meanwhile, hereinafter, the measurement method of the gas measuring apparatus 100 having the above-described configuration will be described once again.

The cleaning method of the gas measuring apparatus 100 of the present embodiment is operated by an air inflow step in which the external air is introduced into the connection pipe 110 through the adsorption unit 180 by operating the pump 170. It may include a washing step for cleaning the connecting tube 110, the pre-treatment collection unit 120, the gas sensor 130 and a plurality of valves by flowing the introduced air in the reverse direction from the connecting tube 110.

During the air inflow step of the present embodiment, air introduced from the outside may be filtered into clean air by the operation of the adsorption unit 180.

Then, during the washing step, as described above, by operating the pump 170, the gas flow in the reverse direction can be formed in the connection pipe 110, and accordingly, the clean air filtered by the adsorption unit 180, As shown in FIG. 2, each configuration passes through the second valve 150, the pump 170, the third valve 160, the first valve 140, the gas sensor 130, and the pretreatment collection part 120. Can be washed. In addition, it is possible to clean the inside of the connector 110 while passing through the connector 110.

In addition, washing or moisture and the like of the pretreatment collection unit 120 may be removed by pushing the moisture or dust collected in the pretreatment collection unit 120 to the outlet of the pretreatment collection unit 120.

On the other hand, hereinafter, through the graph represented in the drawings to demonstrate the superiority of cleaning of the gas measuring device 100 of the present embodiment.

FIG. 3 is a graph showing the monitoring result when the pre-treatment collection unit is not applied in the gas measurement apparatus of FIG. 1, and FIG. 4 is a case in which the pre-treatment collection unit is installed in the gas measurement apparatus of FIG. 1 but the backwashing method is not applied or not It is a graph showing the monitoring result, and FIG. 5 is a graph showing the monitoring result according to the gas measuring device of FIG. 1.

As shown in FIG. 3, when the backwashing technique is not applied, and the moisture trap, that is, the pretreatment collection unit 120 of the present embodiment is not installed, it can be confirmed that the process is proceeding without a certain pattern, and also an electrical signal due to high moisture It can be confirmed that there is a phenomenon in which the value is abnormal.

However, as illustrated in FIG. 4, when the backwashing is performed by installing the pretreatment collection unit 120, the operation start time of the discharge facility, the discharge port monitoring status, the breakdown due to the break time, the lunch time, etc. are clearly identified. It can be confirmed that they are being objectively monitored.

On the other hand, in the case of Figure 5, showing the result of monitoring by installing two gas measuring devices 100 for the outlet of the discharge facility, one of the two measuring devices 100 is a case where only the backwashing technology is applied, The other measuring device 100 is provided with a pre-processing collecting part 120 as well as a backwashing technique.

In the case of a gas containing about 80% or more of moisture with a relatively high humidity in the contaminant of the gas flowing into the gas measuring device 100, an electrical signal value abnormality due to high water vapor is applied to apply only the technology by backwashing, It can be confirmed that there are limitations such as maintenance problems due to sensor failure.

However, when the backwashing technique is applied and the pre-treatment collection unit 120 is provided, it can be confirmed that the discharge facility is stopped and the overall monitoring is stably monitored without a signal.

As described above, according to an embodiment of the present invention, each configuration including the connection pipe 110, the valves 140, 150, 160, and the gas sensor 130 can be cleaned by a backwashing method, resulting in measurement results. It has the advantage of not only improving the accuracy of, but also increasing the life of the device.

In addition, it is possible to remove the moisture or dust that can be contained in the gas by the pre-treatment collection unit 120, it is possible to prevent the connector 110 or other components from being adversely affected by condensation caused by moisture, and thus the device It has the advantage of reducing maintenance costs and increasing stability.

So far, specific embodiments according to the present invention have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the claims described below, but also by the claims and equivalents.

As described above, although the present invention has been described by limited embodiments and drawings, the present invention is not limited to the above embodiments, and various modifications and modifications from these descriptions will be made by those skilled in the art to which the present invention pertains. Deformation is possible. Accordingly, the spirit of the present invention should be understood only by the claims set forth below, and all equivalents or equivalent modifications thereof will be said to belong to the scope of the spirit of the present invention.

100: washable gas measuring device
101: outlet and general atmosphere
110: connector
110a: branch connector
110b: circulation connector
120: pre-treatment collection unit
121: outlet of the pre-treatment collection unit
130: gas sensor
140: first valve
150: second valve
160: third valve
170: pump
180: adsorption unit

Claims (8)

A gas sensor interposed in the connection pipe to detect the degree of contamination of the sample gas flowing through the inlet portion of the connection pipe;
A pump interposed at the rear end of the gas sensor in the connection pipe to generate a flow of gas in the connection pipe;
A plurality of valves interposed in the connection pipe and adjusting a flow direction of the gas according to an opening / closing operation;
A pre-treatment collection part interposed in the inflow portion of the connection pipe to collect water vapor and dust contained in the sample gas;
An adsorption unit connected to the connection pipe and suctioning air from outside to inhale the sucked air into the connection pipe to form a gas flow in the reverse direction to clean the inside of the connection pipe, the gas sensor, and the valve; And
A valve adjusting unit selectively controlling opening and closing of each of the plurality of valves;
Washable gas measurement device comprising a.
According to claim 1,
Each of the plurality of valves is a three-way valve,
Along the connection pipe, the pre-treatment collection part, the gas sensor, the first valve and the second valve and the adsorption part of the plurality of valves are connected in series,
The pump and the third valve of the plurality of valves are connected to the branch connection pipe branched from the second valve,
The third valve is connected to the first valve by a circulation connecting pipe,
By the selective adjustment of the plurality of valves by the valve control unit, the sample tube is measured by the gas sensor or the air introduced through the adsorption unit flows in the reverse direction through the connection tube, the connection tube, Washable gas measurement device, characterized in that for cleaning the pre-treatment collection unit, the gas sensor and the plurality of valves.
According to claim 2,
When the degree of contamination of the sample gas is measured by the gas sensor, the first valve is opened in the direction of the second valve by the valve adjusting unit, the second valve is opened in the direction of the pump, and the sample gas is Washable gas measurement device characterized in that it is discharged through the third valve.
According to claim 2,
When the connection pipe, the pre-treatment collection unit, the gas sensor and the plurality of valves are cleaned, the second valve is opened toward the pump and the adsorption unit, and the third valve is opened toward the first valve , The first valve is opened in the direction of the gas sensor, the air washable gas measuring device, characterized in that the air flowing through the adsorption unit flows in the reverse direction through the connecting pipe.
The method of claim 4,
Washable gas measurement characterized in that when the air introduced through the adsorption unit passes through the pretreatment collection unit, an outlet provided in the pretreatment collection unit is opened and moisture or dust collected in the pretreatment collection unit is discharged to the outside. Device.
In the cleaning method of the gas measuring device according to claim 1,
An air introduction step of introducing external air into the connection pipe through the adsorption unit; And
A washing step of washing the connection pipe, the pretreatment collection part, the gas sensor, and the plurality of valves by operating the pump to flow air introduced by the air introduction step in the reverse direction from the connection pipe;
Method of cleaning a gas measuring device comprising a.
The method of claim 6,
Each of the plurality of valves is a three-way valve,
Along the connection pipe, the pre-treatment collection part, the gas sensor, the first valve and the second valve and the adsorption part of the plurality of valves are connected in series,
The pump and the third valve of the plurality of valves are connected to the branch connection pipe branched from the second valve,
The third valve is connected to the first valve by a circulation connecting pipe,
During the washing step, the second valve is opened in the direction of the pump and the adsorption unit, the third valve is opened in the direction of the first valve, and the first valve is opened in the direction of the gas sensor, so that the adsorption A method of cleaning a gas measuring device, characterized in that air flowing through the part flows in the reverse direction through the connecting pipe.
According to claim 1,
In the washing step, when the air introduced through the adsorption unit passes through the pretreatment collection unit, a discharge hole provided in the pretreatment collection unit is opened to discharge moisture or dust collected in the pretreatment collection unit to the outside. How to wash the gas measuring device.

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