A micro oxygen analyzer sampling auxiliary device

Abstract

The utility model relates to chemical analysis equipment technical field, specifically disclose a kind of trace oxygen analyzer sampling auxiliary equipment. The trace oxygen analyzer sampling auxiliary equipment, including sample inlet tee valve, trace oxygen analyzer inlet tee valve, trace oxygen analyzer, trace oxygen analyzer inlet, trace oxygen analyzer outlet, outlet tee valve and waste gas recovery system. The utility model can solve the security risk that the possible presence of ethylene oxide in nitrogen gas brings in testing process, prevent the influence on environmental protection, avoid you dare to believe the health of operator, improve the efficiency of this work simultaneously, save manpower cost;The life of trace oxygen analyzer oxygen sensor has been extended, and analysis cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of chemical analysis equipment technology, and specifically discloses a sampling auxiliary device for a trace oxygen analyzer. Background Technology

[0002] Existing trace oxygen analyzers are used to analyze the trace oxygen content in gases. The instrument has one inlet and one outlet. When in use, the gas to be measured enters the instrument, and real-time analysis data can be obtained. The gas sample is then discharged into the air.

[0003] When using this instrument to analyze the nitrogen and oxygen content in ethylene oxide tank trucks, the sample gas will contain a certain amount of ethylene oxide. Due to its physicochemical properties, three problems arise: First, there are safety and environmental issues. Ethylene oxide has an explosive limit of 3%-100%, is highly flammable and explosive, and indiscriminate discharge has created a safety hazard. Second, there are issues with analytical accuracy. The gas outlets of tank trucks transporting ethylene oxide vary in size, while the inlet of the trace oxygen analyzer is 1 / 8 inch. During connection, oxygen from the air can easily be introduced, leading to inaccurate analytical results. Third, there is an increase in analytical costs. Ethylene oxide corrodes the analytical sensor of the trace oxygen analyzer, requiring frequent sensor replacement and increasing analytical costs.

[0004] Therefore, there is a need to develop a new type of sampling auxiliary device for trace oxygen analyzers to overcome the above problems. Utility Model Content

[0005] The technical solution adopted in this utility model is as follows:

[0006] A sampling auxiliary device for a trace oxygen analyzer includes a sample inlet three-way valve 1, a trace oxygen analyzer inlet three-way valve 2, a trace oxygen analyzer 3, a trace oxygen analyzer inlet 4, a trace oxygen analyzer outlet 5, an outlet three-way valve 6, and a waste gas recovery system 7.

[0007] One end of the sample inlet three-way valve 1 is the sample inlet, and the other two outlets are respectively connected to the inlet of the micro oxygen analyzer inlet three-way valve 2 and the waste gas recovery system 7.

[0008] The two outlets of the inlet three-way valve 2 of the trace oxygen analyzer are respectively connected to the inlet and outlet three-way valves 6 of the trace oxygen analyzer 3;

[0009] The outlet of the trace oxygen analyzer 3 is connected to one end of the outlet three-way valve 6, and the outlet three-way valve 6 is connected to the waste gas recovery system 7.

[0010] Preferably, the waste gas recovery system 7 is equipped with an absorbent to absorb harmful substances in the waste gas.

[0011] Furthermore, when the absorbent is liquid, the connecting pipe to the waste gas recovery system 7 extends below the liquid surface.

[0012] Furthermore, the connecting pipe to the waste gas recovery system 7 is a flexible hose, and a counterweight is provided at the end of the hose to keep the outlet below the liquid surface.

[0013] Preferably, the inlet three-way valve 1, the micro oxygen analyzer inlet three-way valve 2, the micro oxygen analyzer 3, the micro oxygen analyzer inlet 4, the micro oxygen analyzer outlet 5, the outlet three-way valve 6, and the waste gas recovery system 7 are all connected by rubber tubes.

[0014] Preferably, the connecting pipes to the inlet 4 and outlet 5 of the trace oxygen analyzer are equipped with 1 / 8-inch quick connectors to match the inlet 4 and outlet 5 of the trace oxygen analyzer.

[0015] The beneficial effects achieved by this utility model are:

[0016] This invention can solve the safety hazards posed by ethylene oxide that may be present in nitrogen during the testing process, prevent environmental impact, protect the health of operators, improve the efficiency of the work, and save labor costs; the lifespan of the oxygen sensor in the trace oxygen analyzer is extended, saving analysis costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the sampling auxiliary equipment of the trace oxygen analyzer of this utility model. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail with reference to the following embodiments. It should be noted that this utility model is not limited to the following embodiments.

[0019] Example 1

[0020] A sampling auxiliary device for a trace oxygen analyzer includes a sample inlet three-way valve 1, a trace oxygen analyzer inlet three-way valve 2, a trace oxygen analyzer 3, a trace oxygen analyzer inlet 4, a trace oxygen analyzer outlet 5, an outlet three-way valve 6, and a waste gas recovery system 7.

[0021] One end of the sample inlet three-way valve 1 is the sample inlet, and the other two outlets are respectively connected to the inlet of the micro oxygen analyzer inlet three-way valve 2 and the waste gas recovery system 7.

[0022] The two outlets of the inlet three-way valve 2 of the trace oxygen analyzer are respectively connected to the inlet and outlet three-way valves 6 of the trace oxygen analyzer 3;

[0023] The outlet of the trace oxygen analyzer 3 is connected to one end of the outlet three-way valve 6, and the outlet three-way valve 6 is connected to the waste gas recovery system 7.

[0024] The inlet three-way valve 1, the trace oxygen analyzer inlet three-way valve 2, the trace oxygen analyzer 3, the trace oxygen analyzer inlet 4, the trace oxygen analyzer outlet 5, the outlet three-way valve 6, and the waste gas recovery system 7 are all connected by rubber hoses. The waste gas recovery system 7 contains a water-absorbing agent, which absorbs harmful substances in the waste gas. The connecting pipe to the waste gas recovery system 7 is a flexible hose, with a counterweight at the end to keep the outlet below the liquid level.

[0025] The connecting pipes to the inlet 4 and outlet 5 of the trace oxygen analyzer are equipped with 1 / 8-inch quick connectors to match the inlet 4 and outlet 5 of the trace oxygen analyzer.

[0026] When in use, the working process includes two stages:

[0027] Pipeline purging stage: The trace oxygen analyzer is turned off, and the sample enters the trace oxygen analyzer inlet three-way valve 2 bypass via inlet three-way valve 1, and enters the waste gas recovery system 7 via outlet three-way valve 6, thus completing the pipeline purging work;

[0028] Analysis phase: Turn on the trace oxygen analyzer 3. The sample enters the main line of the trace oxygen analyzer inlet three-way valve 2 through the inlet three-way valve 1, passes through the trace oxygen analyzer inlet 4, and enters the trace oxygen analyzer 3. The instrument displays the analysis results. The sample enters the outlet three-way valve 6 through the trace oxygen analyzer outlet 5, and finally enters the waste gas recovery system 7 to complete the analysis.

[0029] With the daily analysis of trace oxygen content in nitrogen from approximately 10-15 ethylene oxide tank trucks, this method can resolve the safety hazards posed by the presence of ethylene oxide in the nitrogen during the testing process, prevent environmental impact, protect the health of operators, improve the efficiency of the work, and save labor costs. Furthermore, the lifespan of the oxygen sensor in the trace oxygen analyzer is extended, further reducing analysis costs.

Claims

1. A sampling auxiliary device for a trace oxygen analyzer, characterized in that, It includes a sample inlet three-way valve (1), a trace oxygen analyzer inlet three-way valve (2), a trace oxygen analyzer (3), a trace oxygen analyzer inlet (4), a trace oxygen analyzer outlet (5), an outlet three-way valve (6), and a waste gas recovery system (7); One end of the sample inlet three-way valve (1) is the sample inlet, and the other two outlets are respectively connected to the inlet of the micro oxygen analyzer inlet three-way valve (2) and the waste gas recovery system (7); The two outlets of the inlet three-way valve (2) of the trace oxygen analyzer are respectively connected to the inlet and outlet three-way valves (6) of the trace oxygen analyzer (3); The outlet of the trace oxygen analyzer (3) is connected to one end of the outlet three-way valve (6), and the outlet three-way valve (6) is connected to the waste gas recovery system (7).

2. The sampling auxiliary device for the trace oxygen analyzer according to claim 1, characterized in that, The waste gas recovery system (7) is equipped with an absorbent.

3. The sampling auxiliary device for the trace oxygen analyzer according to claim 2, characterized in that, When the absorbent is liquid, the connecting pipe to the waste gas recovery system (7) extends below the liquid surface.

4. The sampling auxiliary device for the trace oxygen analyzer according to claim 3, characterized in that, The connecting pipe to the waste gas recovery system (7) is a flexible hose with a counterweight at the end of the hose to keep the outlet below the liquid surface.

5. The sampling auxiliary device for the trace oxygen analyzer according to claim 1, characterized in that, The inlet three-way valve (1), the micro oxygen analyzer inlet three-way valve (2), the micro oxygen analyzer (3), the micro oxygen analyzer inlet (4), the micro oxygen analyzer outlet (5), the outlet three-way valve (6), and the waste gas recovery system (7) are all connected by rubber tubes.

6. The sampling auxiliary device for the trace oxygen analyzer according to claim 1, characterized in that, The connecting pipes to the inlet (4) and outlet (5) of the trace oxygen analyzer are equipped with 1 / 8-inch quick connectors to match the inlet (4) and outlet (5) of the trace oxygen analyzer.

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