A dew point analyzer probe sample gas cooling system

Abstract

This utility model relates to a sample gas cooling system for a dew point analyzer probe, belonging to the technical field of gas analysis instruments and equipment. The technical solution of this utility model is as follows: a heat dissipation coil (5) is installed inside a cooling chamber (6). The inlet of the heat dissipation coil (5) is connected to the sample gas inlet valve (1), and the outlet of the heat dissipation coil (5) is connected to the sample gas outlet valve (2). The inlet of the sample gas inlet valve (1) is connected to the sample gas pipe of the equipment, and the sample gas outlet valve (2) is connected to the dew point measuring device (7). The inlet section of the instrument gas inlet valve (3) is connected to the external instrument air, and the outlet end is connected to the cooling chamber (6). The inlet end of the instrument gas outlet valve (4) is connected to the cooling chamber (6), and the outlet end is connected to the atmosphere. The beneficial effects of this utility model are: simple structure, convenient operation, and the ability to provide stable cooling gas, thereby rapidly cooling the sample gas required by the dew point probe to the rated temperature, ensuring accurate and timely measurement, and reducing malfunctions.

Description

Technical Field

[0001] This utility model relates to a sample gas cooling system for a dew point analyzer probe, belonging to the technical field of gas analysis instruments and equipment. Background Technology

[0002] Air separation equipment is an industrial system used to separate various components of air to produce oxygen, nitrogen, and argon. It can also produce rare gases such as helium, neon, argon, krypton, xenon, and radon. During the air separation process, online gas analyzers are required to analyze the products. These analyzers are the "eyes" of the equipment, ensuring safe production and product quality. Therefore, dew point analysis is essential for the safe and stable operation of air separation equipment. It is a crucial safeguard for safe operation. For example, dew point analyzers must be installed before air enters the air separation unit, at the outlet of the steam heater for waste nitrogen, and at the outlet of the oxygen and nitrogen compressor to ensure that the moisture content of the gases meets the required standards. Failure to do so can cause significant damage to the air separation equipment and even to the user.

[0003] Currently, key equipment in air separation units, such as the molecular sieve outlet, the waste nitrogen steam heater outlet, and the oxygen-nitrogen compressor outlet, must be equipped with online dew point analyzers. This involves installing sampling tubes in these devices. The sample gas flows through an analyzer box equipped with a dew point probe installed on-site. The dew point probe measures the dew point and converts it into a standard signal, which is then transmitted to a host computer or DCS, thus completing online dew point monitoring. The sample gas taken from the waste nitrogen steam heater outlet has a very high temperature, reaching approximately 200°C, due to the high temperature heating process. However, the dew point probe's operating temperature is between -20°C and 50°C. Operating the dew point probe outside its rated temperature for extended periods will significantly impact its measurement accuracy, stability, and lifespan, posing a major threat to the safe and stable operation of the air separation unit.

[0004] Therefore, in order to ensure the stable, accurate, and timely operation of dew point analysis, it is essential to improve the dew point analysis sampling system to ensure that the dew point probe operates within the rated temperature range, thereby guaranteeing the timeliness and accuracy of the analysis results. Summary of the Invention

[0005] The purpose of this invention is to provide a sample gas cooling system for a dew point analyzer probe. By installing a heat dissipation coil in the cooling chamber, a room temperature gas source is used to exchange heat with the high temperature sample gas. The system has a simple structure, is easy to operate, and can provide a stable cooling gas, thereby rapidly cooling the sample gas required by the dew point probe to the rated temperature, ensuring accurate and timely measurement, reducing malfunctions, and solving the aforementioned problems in the background technology.

[0006] The technical solution of this utility model is: a sample gas cooling system for a dew point analyzer probe, comprising a sample gas inlet valve, a sample gas outlet valve, an instrument gas inlet valve, an instrument gas outlet valve, a heat dissipation coil, a cooling chamber, and a dew point measuring device. The heat dissipation coil is installed inside the cooling chamber. The inlet of the heat dissipation coil is connected to the sample gas inlet valve, and the outlet of the heat dissipation coil is connected to the sample gas outlet valve. The inlet of the sample gas inlet valve is connected to the sample gas pipe of the equipment, and the sample gas outlet valve is connected to the dew point measuring device. The inlet section of the instrument gas inlet valve is connected to external instrument air, and the outlet end is connected to the cooling chamber. The inlet end of the instrument gas outlet valve is connected to the cooling chamber, and the outlet end is connected to the atmosphere.

[0007] The cooling chamber is a cylindrical stainless steel enclosed hollow cylinder.

[0008] The heat dissipation coil is made of 6mm stainless steel tubing.

[0009] The sample gas outlet valve is connected to the dew point measuring device by a 6mm stainless steel metal tube.

[0010] The beneficial effects of this utility model are: by setting a heat dissipation coil in the cooling chamber, the high-temperature sample gas is heat exchanged using a normal temperature gas source. The structure is simple and easy to operate. It can provide a stable cooling gas, thereby quickly cooling the sample gas required by the dew point probe to the rated temperature, ensuring accurate and timely measurement, and reducing malfunctions. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; In the diagram: 1. Sample gas inlet valve; 2. Sample gas outlet valve; 3. Instrument gas inlet valve; 4. Instrument gas outlet valve; 5. Cooling coil; 6. Cooling chamber; 7. Dew point measuring device. Detailed Implementation

[0012] To make the purpose, technical solution, and advantages of this utility model clearer, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described implementation cases are only a small part of this utility model, not all of them. All other implementation cases obtained by those skilled in the art based on the implementation cases of this utility model without creative effort are within the protection scope of this utility model.

[0013] A sample gas cooling system for a dew point analyzer probe includes a sample gas inlet valve 1, a sample gas outlet valve 2, an instrument gas inlet valve 3, an instrument gas outlet valve 4, a heat dissipation coil 5, a cooling chamber 6, and a dew point measuring device 7. The heat dissipation coil 5 is installed inside the cooling chamber 6. The inlet of the heat dissipation coil 5 is connected to the sample gas inlet valve 1, and the outlet of the heat dissipation coil 5 is connected to the sample gas outlet valve 2. The inlet of the sample gas inlet valve 1 is connected to the sample gas pipe of the equipment, and the sample gas outlet valve 2 is connected to the dew point measuring device 7. The inlet section of the instrument gas inlet valve 3 is connected to the external instrument air, and the outlet end is connected to the cooling chamber 6. The inlet end of the instrument gas outlet valve 4 is connected to the cooling chamber 6, and the outlet end is connected to the atmosphere.

[0014] The cooling chamber 6 is a cylindrical stainless steel enclosed hollow cylinder.

[0015] The heat dissipation coil 5 is made of 6mm stainless steel tubing.

[0016] The sample gas outlet valve 2 and the dew point measuring device 7 are connected by a 6mm stainless steel metal pipe. Example

[0017] (1) The model of sample gas inlet valve 1, sample gas outlet valve 2, instrument gas inlet valve 3 and instrument gas outlet valve 4 is: swagelok SS-1RS6MM (2) Heat dissipation coil 5: Stainless steel pressure guide tube diameter: 6mm; (3) Cooling chamber 6: Cylindrical stainless steel enclosed hollow cylinder, diameter: 80mm, height: 200mm (4) Dew point measuring device 7: Model MICHELL.

[0018] The working process of this utility model is as follows: Open the instrument gas inlet valve 3 and instrument gas outlet valve 4 of the de-cooling chamber 6, and then slowly open the sample gas inlet valve 1 and sample gas outlet valve 2 to allow the de-cooled sample gas to slowly enter the dew point measuring device 7 for measurement. At this point, the de-cooling device is turned on.

[0019] Because a room-temperature gas source is connected to the cooling chamber, it exchanges heat with the high-temperature sample gas entering the cooling coil. The room-temperature gas source then discharges the heat-exchanged air into the atmosphere through a discharge valve. This allows the sample gas in the cooling coil to be rapidly cooled to the rated measurement temperature of the dew point probe, and then the dew point probe measures the temperature through the outlet valve of the cooling coil. The structure is simple and easy to operate, ensuring a stable sample gas supply temperature to the dew point probe, reaching the rated temperature, thus guaranteeing timely and accurate dew point analysis.

Claims

1. A dew point analyzer probe sample gas cooling system characterized by: It includes a sample gas inlet valve (1), a sample gas outlet valve (2), an instrument gas inlet valve (3), an instrument gas outlet valve (4), a heat dissipation coil (5), a cooling chamber (6), and a dew point measuring device (7). The heat dissipation coil (5) is installed in the cooling chamber (6). The inlet of the heat dissipation coil (5) is connected to the sample gas inlet valve (1), and the outlet of the heat dissipation coil (5) is connected to the sample gas outlet valve (2). The inlet of the sample gas inlet valve (1) is connected to the sample gas pipe of the equipment, and the sample gas outlet valve (2) is connected to the dew point measuring device (7). The inlet section of the instrument air inlet valve (3) is connected to the external instrument air, and the outlet end is connected to the desuperheating chamber (6). The inlet end of the instrument air outlet valve (4) is connected to the desuperheating chamber (6), and the outlet end is connected to the atmosphere.

2. The dew point analyzer probe sample gas cooling system according to claim 1, characterized in that: The cooling chamber (6) is a cylindrical stainless steel enclosed hollow cylinder.

3. The dew point analyzer probe sample gas cooling system according to claim 1, characterized in that: The heat dissipation coil (5) is made of 6mm stainless steel metal tube.

4. The dew point analyzer probe sample gas cooling system according to claim 1, characterized in that: The sample gas outlet valve (2) is connected to the dew point measuring device (7) by a 6mm stainless steel metal pipe.

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