Auxiliary device for gas analysis in synthesis ammonia production

Abstract

The utility model relates to an auxiliary device for gas analysis in synthesis ammonia production, which comprises a plurality of sample gas interfaces, and the sample gas interfaces are connected in parallel and then communicated with an analyzer interface; each sample gas interface is provided with a valve capable of controlling the on-off of the sample gas interface; the sample gas interface is respectively communicated with each sampling point on the synthesis ammonia production line through a pipeline, and the analyzer interface is communicated with a gas analyzer, so that different sampling gases can be input into the gas analyzer for analysis. According to the utility model, the plurality of sample gas interfaces are communicated with different sampling points on the synthetic ammonia production line, so that different sampling gases can be input into a gas analyzer for analysis, and therefore, the whole production line can meet the requirements by only using one gas analyzer, and the project cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to a chemical production device, in particular to an auxiliary device for ammonia synthesis production, specifically an auxiliary device for gas analysis in ammonia synthesis production. Background Art

[0002] During the ammonia synthesis production process, it is necessary to analyze the gases at different stages in order to timely understand the composition of the gases and provide a basis for subsequent adjustment.

[0003] Currently, gas analyzers are mainly used to conduct on-site sampling and analysis of the gases at each sampling point. Moreover, in order to improve the analysis work efficiency, a gas analyzer is often equipped at each sampling point. However, the price of gas analyzers is relatively high, thus greatly increasing the project cost. In addition, the on-site calibration and maintenance work of gas analyzers is rather cumbersome, thereby increasing the workload in production.

[0004] Therefore, improvement is needed to better meet the production requirements. Summary of the Utility Model

[0005] The purpose of the utility model is to address the problems encountered in gas analysis during ammonia synthesis production, and provide an auxiliary device for gas analysis in ammonia synthesis production. Under the premise of using one gas analyzer, it can smoothly complete the gas analysis of multiple sampling points, not only greatly reducing the project cost, but also simplifying the operation procedure, reducing the workload, and creating favorable conditions for improving efficiency.

[0006] The technical solution of the utility model is as follows:

[0007] An auxiliary device for gas analysis in ammonia synthesis production includes a plurality of sample gas interfaces, which are connected in parallel and then communicate with an analyzer interface; a valve capable of controlling its on-off is respectively provided on each of the sample gas interfaces; the sample gas interfaces are respectively connected to each sampling point on the ammonia synthesis production line through pipelines, and the analyzer interface is connected to a gas analyzer, so as to input different sampled gases into the gas analyzer for analysis.

[0008] Further, a check valve is also provided on each of the sample gas interfaces.

[0009] Further, a pressure regulating device is provided at the analyzer interface to regulate the gas pressure entering the gas analyzer.

[0010] Further, a pressure measuring device is respectively provided at the inlet and outlet of the pressure regulating device.

[0011] Further, the pressure regulating device is a pressure regulating valve or a pressure reducing valve.

[0012] Further, it further includes a three-way valve, the two ends of which are connected in series on the pipeline between the parallel ends of the pressure reducing valve and the sample gas interface, and the third end thereof is connected to the calibration gas interface; the calibration gas interface is connected to the standard gas.

[0013] Further, it further includes a cabinet; the auxiliary device is installed in the cabinet, and the analyzer interface, the sample gas interface, and the calibration gas interface are arranged on the side wall of the cabinet or extend outside the cabinet.

[0014] Advantages of the utility model:

[0015] The utility model is reasonably designed, simple in structure and convenient to use. It can be connected to different sampling points on the synthetic ammonia production line through multiple sample gas interfaces, so as to input different sampled gases into the gas analyzer for analysis. Thus, only one gas analyzer is needed for the whole production line to meet the requirements, greatly reducing the project cost. Moreover, the utility model can also simplify the operation procedure, and through the control of the three-way valve, the in-situ calibration of the gas analyzer is carried out using the standard gas, reducing the workload and creating favorable conditions for improving efficiency. Description of the drawings

[0016] Figure 1 is a schematic structural diagram of the utility model.

[0017] Figure 2 is a schematic diagram of the working state of the utility model.

[0018] Wherein, 1 - sample gas interface; 2 - calibration gas interface; 3 - analyzer interface; 4 - valve; 5 - check valve; 6 - three-way valve; 7 - pressure regulating device; 8 - pressure measuring device; 9 - cabinet. Detailed implementation manners

[0019] The following further describes the utility model in conjunction with the drawings and embodiments.

[0020] As Figure 1 shown.

[0021] An auxiliary device for gas analysis in synthetic ammonia production of the utility model includes multiple sample gas interfaces 1 and analyzer interfaces 3, etc.

[0022] After being connected in parallel, each of the sample gas interfaces 1 is then connected to the analyzer interface 3 through two ports of the three-way valve 6 in sequence and a pressure regulating device 7 connected in series. The number of the sample gas interfaces 1 is not less than the number of sampling points on the synthetic ammonia production line, so that each sampling point can be connected to a sample gas interface. The analyzer interface 3 is detachably connected to the gas analyzer, so as to input different sample gases into the gas analyzer for analysis.

[0023] A valve 4 and a check valve 5 are respectively provided on each of the sample gas interfaces 1. The valve 4 can control the on-off of the sample gas interface 1 to ensure that the sample gas interface is used as required. The check valve 5 can prevent the gas flowing into the sample gas interface from flowing back, ensuring the normal operation of sampling.

[0024] The third port of the three-way valve 6 is connected to the calibration gas interface 2, and the calibration gas interface 2 is connected to a standard gas so as to input the standard gas into the gas analyzer when needed for in-situ calibration of the gas analyzer, simplifying the calibration process.

[0025] The pressure regulating device 7 can reduce the pressure of the gas flowing into the gas analyzer to meet the usage requirements of the gas analyzer. At the same time, a pressure measuring device 8 is respectively arranged at the inlet and outlet of the pressure regulating device 7 to more intuitively and timely understand the pressure condition. Preferably, the pressure regulating device 7 can be a pressure regulating valve or a pressure reducing valve. Correspondingly, the pressure measuring device can be a remote pressure gauge or an ordinary pressure gauge. That is, when the pressure regulating device is a pressure regulating valve, the pressure measuring device can be a remote pressure gauge to achieve remote dynamic regulation. When the pressure regulating device is a pressure reducing valve, the pressure measuring device can be an ordinary pressure gauge for manual regulation.

[0026] Considering the relatively high requirements for on-site installation and protection of chemical plants, the present utility model further includes a cabinet 9, and each part of the present utility model is placed in the cabinet. For convenient use, the sample gas interface 1, the calibration gas interface 2, the analyzer interface 3, etc. can be arranged on the side wall of the cabinet 9 or led out of the cabinet 9 for convenient use.

[0027] A usage scenario of the present utility model is as Figure 2 shown. The following sampling points are set on the synthetic ammonia production line: a first sampling point is set at the inlet of the hydrogen-nitrogen compressor, a second sampling point is set on the pipeline between the inlet of the ammonia synthesis tower and the recycle gas compressor, and a third sampling point is set on the pipeline between the outlet of the ammonia synthesis tower and the ammonia separator. Then, the above three sampling points are respectively connected to the three sample gas interfaces of the present utility model, and the valves on the sample gas interfaces are controlled to be respectively opened as needed. At the same time, the three-way valve is adjusted to make the sample gas interface communicate with the analyzer interface so as to transport the sampled gas to the gas analyzer for analysis. After running for a period of time, in order to eliminate the zero drift of the gas analyzer and improve the reliability of the measurement results, it is necessary to calibrate the gas analyzer. The specific calibration time depends on different analyzer models. At this time, the valves on all sample gas interfaces are closed, and the calibration gas interface is connected to the standard gas input end. At the same time, the three-way valve is adjusted to make the calibration gas interface communicate with the analyzer interface, so that the standard gas can be input into the gas analyzer to achieve in-situ calibration.

[0028] The utility model is connected to different sampling points on the synthetic ammonia production line through multiple sample gas interfaces, so as to input different sampled gases into the gas analyzer for analysis. Thus, only one gas analyzer is needed for the entire production line to meet the requirements, greatly reducing the project cost. Moreover, the utility model can also simplify the operation procedure, and through the control of the three-way valve, in-situ calibration of the gas analyzer is carried out using standard gas, reducing the workload and creating favorable conditions for improving efficiency.

[0029] Parts not involved in the utility model are the same as the prior art or can be implemented by using the prior art.

Claims

1. An auxiliary device for gas analysis in synthetic ammonia production, comprising a plurality of sample gas interfaces, characterized in that: The sample gas interface is connected in parallel and communicated with the analyzer interface; each of the sample gas interfaces is provided with a valve capable of controlling its on and off; the sample gas interfaces are respectively connected to the sampling points on the synthetic ammonia production line through pipelines, and the analyzer interface is connected to the gas analyzer, so that different sample gases can be input into the gas analyzer for analysis.

2. The auxiliary device for gas analysis in synthetic ammonia production according to claim 1, characterized in that: Each of the sample gas interfaces is also provided with a one-way valve.

3. The auxiliary device for gas analysis in synthetic ammonia production according to claim 1, characterized in that: A pressure regulating device is provided at the analyzer interface to regulate the pressure of the gas entering the gas analyzer.

4. The auxiliary device for gas analysis in synthetic ammonia production according to claim 3, characterized in that: The pressure regulating device is a pressure regulating valve or a pressure reducing valve.

5. The auxiliary device for gas analysis in synthetic ammonia production according to claim 3, characterized in that: A pressure measuring device is respectively provided at the inlet and outlet of the pressure regulating device.

6. The auxiliary device for gas analysis in synthetic ammonia production according to claim 3, characterized in that: It also includes a three-way valve, two ends of which are connected in series to the pipeline between the parallel end of the pressure regulating device and the sample gas interface, and the third end is connected to the standard gas interface; the standard gas interface is connected to the standard gas.

7. The auxiliary device for gas analysis in synthetic ammonia production according to claim 6, characterized in that: It also includes a cabinet; the auxiliary device is installed in the cabinet, and the analyzer interface, sample gas interface, and standard gas interface are arranged on the side wall of the cabinet or extend out of the cabinet.

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