Automatic switching pipeline of analyzer shared by multiple gas sources

Abstract

The utility model belongs to the technical field of air separation and air compression devices, and relates to an automatic switching pipeline for an analyzer shared by multiple air sources, which comprises an air separation cold box, a sealing air inlet pipeline arranged at the bottom of the front side of the air separation cold box, a purified air pipeline arranged on the rear side of the air separation cold box, and a pneumatic valve arranged on the purified air pipeline. An instrument gas pipeline is arranged on the pneumatic valve, an instrument gas analysis pipe is led out of the instrument gas pipeline and connected to a dew point analyzer, a purified air analysis pipe is led out of the purified air pipeline and connected to the dew point analyzer, and a sealing gas analysis pipe is led out of the sealing gas inlet pipeline and connected to the dew point analyzer. The dew point analyzer is connected to a compressed air pipeline through a compressed air analysis pipe, and the compressed air pipeline is connected with an air compression station compressor. According to the utility model, various sample gases are collected, concentrated collection, remote switching and shared analysis are realized, the configuration number of analyzers is reduced, the investment cost is reduced, and the later maintenance expenditure is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of air separation and air compression devices, and particularly relates to an automatic switching pipeline for a multi-gas-source shared analyzer. Background Technique

[0002] The air separation station area and the air compression station area supporting the steel mill are centrally designed in one place, which can achieve the mutual sharing of energy and analytical instruments and save costs. Different media such as compressed air, instrument air, and seal air are designed in the station area, and the water content, that is, the dew point temperature, is required to be lower than -60°C for all of them. For this reason, multiple dew point analyzers need to be designed.

[0003] In the industry, dew point analysis of different gas sources such as product compressed air, instrument air, and seal air requires separate configuration of dew point analyzers. They are installed in different processes and different positions respectively, with high investment costs for valuable analyzers and high later use and maintenance costs.

[0004] Therefore, an automatic switching pipeline for a multi-gas-source shared analyzer is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide an automatic switching pipeline for a multi-gas-source shared analyzer, which has the function of sharing a multi-gas-source analyzer and solves the problems of high investment costs and high later use and maintenance costs in the prior art of designing multiple dew point analyzers.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is that the utility model provides an automatic switching pipeline for a multi-gas-source shared analyzer, including an air separation cold box. A seal air inlet pipeline is arranged at the bottom of the front side of the air separation cold box. A purified air pipeline is arranged at the rear side of the air separation cold box. A pneumatic valve is arranged on the purified air pipeline. An instrument air pipeline is arranged on the pneumatic valve. An instrument air analysis pipe is led out from the instrument air pipeline and connected to a dew point analyzer. A purified air analysis pipe is led out from the purified air pipeline and connected to the dew point analyzer. A seal air analysis pipe is led out from the seal air inlet pipeline and connected to the dew point analyzer. The dew point analyzer is connected to a compressed air pipeline through a compressed air analysis pipe, and the compressed air pipeline is connected to an air compressor in the air compression station.

[0007] Preferably, an instrument analysis valve is arranged on the instrument air analysis pipe.

[0008] Preferably, a purified analysis valve is arranged on the purified air analysis pipe.

[0009] Preferably, a compressed analysis valve is arranged on the compressed air analysis pipe.

[0010] Preferably, a seal analysis valve is arranged on the seal air analysis pipe.

[0011] Preferably, the instrument analysis valve, purification analysis valve, compression analysis valve, and seal analysis valve are solenoid valves.

[0012] Compared with the prior art, the advantages and positive effects of the present utility model are as follows.

[0013] 1. The present utility model collects various sample gases, centrally converges them, remotely switches and shares the analysis, reduces the number of configured analyzers, lowers the investment cost, and reduces the later maintenance expenditure.

[0014] 2. The present utility model has the function of sharing multiple gas source analyzers, solving the problems of high investment cost and high later use and maintenance cost in the prior art of designing multiple dew point analyzers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

[0016] Figure 1 It is a schematic structural diagram of an automatic switching pipeline for a multi-gas source shared analyzer.

[0017] In the above figures, 1. Sealed gas inlet pipeline, 2. Air separation cold box, 3. Purified air pipeline, 4. Instrument gas pipeline, 5. Air compressor station compressor, 6. Compressed air pipeline, 7. Seal analysis valve, 8. Purification analysis valve, 9. Instrument analysis valve, 10. Compression analysis valve, 11. Dew point analyzer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to be able to more clearly understand the above objects, features, and advantages of the present utility model, the following further describes the present utility model with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0019] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0020] Embodiment 1, as Figure 1As shown in the figure, an automatic switching pipeline for a multi-gas-source shared analyzer includes an air separation cold box 2. The air separation cold box 2 is used to separate the gas components in the air and provide low-temperature gas through cooling and compression methods, providing the necessary cooling and pressure conditions for subsequent gas analysis to ensure the purity and stability of the required gas. A sealing gas inlet pipeline 1 is arranged at the bottom of the front side of the air separation cold box 2. The sealing gas inlet pipeline 1 supplies the required sealing gas. Nitrogen is commonly used as the sealing gas in the industry to prevent external humid air from entering the low-temperature air separation cold box 2. The professional pipeline design ensures the flow stability of the sealing gas, avoiding gas loss and external environmental impacts.

[0021] A purified air pipeline 3 is arranged at the rear side of the air separation cold box 2. The purified air pipeline 3 provides purified air after passing through the air separation cold box 2. The purified air 3 requires a dew point temperature lower than -60°C. A pneumatic valve is arranged on the purified air pipeline 3. The pneumatic valve controls the opening and closing of the purified air pipeline 3 and adjusts the gas flow rate in the pipeline. An instrument air pipeline 4 is arranged on the pneumatic valve. The instrument air pipeline 4 is used to supply gas to the pneumatic valve. In the industry, mainly dry air and nitrogen are used as the instrument air for the power gas source of the pneumatic valve.

[0022] An instrument air analysis pipe is led out from the instrument air pipeline 4 and connected to a dew point analyzer 11. A purified air analysis pipe is led out from the purified air pipeline 3 and connected to the dew point analyzer 11. A sealing gas analysis pipe is led out from the sealing gas inlet pipeline 1 and connected to the dew point analyzer 11. The dew point analyzer 11 is connected to a compressed air pipeline 6 through a compressed air analysis pipe. Among them, the compressed air is mainly dry air at 0.6 - 0.8 MPa and is used as the power gas source for steel plant back blowing and pneumatic ash conveying. The instrument air analysis pipe, purified air analysis pipe, sealing gas analysis pipe, and compressed air analysis pipe are used to transport different gas sources to the dew point analyzer 11 to support the real-time monitoring of various gases. The dew point analyzer 11 is used to measure different gases to ensure that they meet the requirement of -60°C. It is a high-precision measuring device that can provide timely and reliable moisture detection results.

[0023] The compressed air pipeline 6 is connected to an air compressor station compressor 5. The air compressor station compressor 5 is responsible for compressing the air to the required pressure for subsequent process use or storage. The compressed air pipeline 6 is used to collect the sample gas of the compressed air for analysis.

[0024] Next, the specific design of the above key components will be described in detail:

[0025] An instrument analysis valve 9 is arranged on the instrument air analysis pipe. The instrument analysis valve 9 is installed on the instrument air analysis pipe and is used to control the flow of the instrument air to ensure that it can be smoothly sent to the dew point analyzer 11 for analysis. The instrument analysis valve 9 can be opened or closed as needed.

[0026] A purification analysis valve 8 is provided on the purified air analysis pipe. The purification analysis valve 8 is arranged on the purified air analysis pipe and is responsible for controlling the flow of purified air to ensure that the purified air is guided to the dew point analyzer 11 when analysis is required.

[0027] A compression analysis valve 10 is provided on the compressed air analysis pipe. The compression analysis valve 10 is located on the compressed air analysis pipe and is responsible for controlling the introduction of the compressed air sample gas, effectively realizing the connection with the dew point analyzer 11 for the dew point test of the compressed air.

[0028] A seal analysis valve 7 is provided on the seal gas analysis pipe. The seal analysis valve 7 is arranged on the seal gas analysis pipe and is used to guide the seal gas sample to the dew point analyzer 11. When needed, the seal gas flows to the analyzer for measurement.

[0029] The instrument analysis valve 9, purification analysis valve 8, compression analysis valve 10, and seal analysis valve 7 are solenoid valves. The solenoid valves can achieve DCS remote switch control. On the air separation DCS centralized control computer operating system, an interface for gas source analysis is added, and the seal analysis valve 7, purification analysis valve 8, instrument analysis valve 9, and compression analysis valve 10 are respectively corresponding and displayed on the DCS, and a remote switch function is set. It should be noted that the dew point analyzer 11 detects one kind of gas each time. When the valve to be detected is opened, other valves are closed.

[0030] The standard parts used in the present utility model can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. Coupled with the circuit connection adopting the conventional connection method in the prior art, details are not described herein. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0031] The above is only the preferred embodiment of the present utility model, and it is not intended to limit the present utility model in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present utility model, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An automatic switching pipeline for a multi-gas source shared analyzer, characterized in that: It includes an air separation cold box, a sealed air inlet pipe is arranged at the bottom of the front side of the air separation cold box, a purified air pipe is arranged at the rear side of the air separation cold box, a pneumatic valve is arranged on the purified air pipe, an instrument air pipe is arranged on the pneumatic valve, an instrument air analysis pipe is led out from the instrument air pipe and connected to a dew point analyzer, a purified air analysis pipe is led out from the purified air pipe and connected to the dew point analyzer, a sealed air analysis pipe is led out from the sealed air inlet pipe and connected to the dew point analyzer, the dew point analyzer is connected to the compressed air pipe through the compressed air analysis pipe, and the compressed air pipe is connected to the compressor of the air compression station.

2. The automatic switching pipeline of a multi-gas source shared analyzer according to claim 1 is characterized in that: The instrument gas analysis pipe is provided with an instrument analysis valve.

3. The automatic switching pipeline of a multi-gas source shared analyzer according to claim 2, characterized in that: The purified air analysis tube is provided with a purification analysis valve.

4. The automatic switching pipeline of a multi-gas source shared analyzer according to claim 3 is characterized in that: The compressed air analysis tube is provided with a compression analysis valve.

5. The automatic switching pipeline of a multi-gas source shared analyzer according to claim 4, characterized in that: A sealing analysis valve is arranged on the sealing gas analysis tube.

6. The automatic switching pipeline of a multi-gas source shared analyzer according to claim 5, characterized in that: The instrument analysis valve, purification analysis valve, compression analysis valve and sealing analysis valve are solenoid valves.

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