Flue gas on-line monitoring device under high CO condition

Abstract

The utility model belongs to the technical field of gas monitoring, and particularly relates to a flue gas on-line monitoring device under a high-CO condition. Comprising an exhaust funnel, the sampling end of the exhaust funnel is provided with a sampling probe, the sampling probe is connected with a CEMS analyzer through a heat tracing pipeline, the CEMS analyzer is internally provided with a calibration port, a sampling pump, an electrochemical module interface and a gas chamber, and the sampling pump is sequentially connected with a heating box and a condenser through a pipeline. The gas inlet end of the sampling pump is connected with a calibration port through a pipeline, a three-way filter and a check valve, the calibration port is connected with a gas chamber and an electromagnetic valve in parallel through the pipeline and the three-way filter, the liquid discharge end of the condenser is connected with a waste liquid barrel and an electrochemical oxygen measurement module in parallel through the pipeline and the three-way filter, and the electrochemical oxygen measurement module is inserted into an electrochemical module interface. According to the utility model, when the high-CO flue gas is monitored, the chemical reaction between CO and O2 is reduced, so that the measurement of the oxygen content of the flue gas is more accurate.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas monitoring, and in particular relates to an online flue gas monitoring device under high CO conditions. Background Art

[0002] In current production, in order to solve the problem of low sulfur dioxide adsorption data, most people use a hot-wet method flue gas emission continuous monitoring system, which uses full-process heating.

[0003] The thermal-wet flue gas emission continuous monitoring system uses the zirconium oxide method to detect the oxygen content in the flue gas. However, in actual production, when faced with an environment with a high carbon monoxide content, the zirconium oxide probe will be subject to certain interference (CO and O2 produce a chemical reaction under high temperature conditions inside the instrument), resulting in the oxygen content data measured by the zirconium oxide being low. Summary of the invention

[0004] The utility model aims to provide a flue gas online monitoring device under high CO conditions to solve the problems existing in the prior art.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an online flue gas monitoring device under high CO conditions, including an exhaust chimney, a sampling probe is installed at the sampling end of the exhaust chimney, the sampling probe is connected to a CEMS analyzer through a heating pipeline, a calibration port, a sampling pump, an electrochemical module interface, and a gas chamber are arranged in the CEMS analyzer, the sampling pump is sequentially connected to a heating box and a condenser through pipelines, and is characterized in that the air inlet end of the sampling pump is connected to the calibration port through a pipeline, a 1# three-way filter, and a check valve, the calibration port is connected to a gas chamber and a solenoid valve in parallel through a pipeline and a 2# three-way filter, the discharge end of the condenser is connected to a waste liquid bucket and an electrochemical oxygen measurement module in parallel through a pipeline and a 3# three-way filter, and the electrochemical oxygen measurement module is plugged into the electrochemical module interface.

[0006] The utility model has the following beneficial effects:

[0007] 1. The utility model can reduce the chemical reaction between CO and O2 when monitoring high-CO flue gas, thereby making the measurement of flue gas oxygen content more accurate.

[0008] 2. By plugging the electrochemical oxygen measurement module into the electrochemical module interface to replace the original electrochemical cobalt oxide module, the chemical reaction between CO and O2 is reduced, making the measurement of flue gas oxygen content more accurate.

[0009] 3. The flue gas entering the electrochemical oxygen measurement module is condensed and separated into gas and liquid through a condenser and a 3# three-way filter, thereby reducing the moisture in the flue gas and preventing the impact of excessive moisture content on monitoring.

[0010] 4. The air inlet of the sampling pump is connected in parallel with the calibration port through the 1# three-way filter, and calibration is performed while testing, further improving the accuracy of the monitoring results. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the CEMS analyzer of the utility model.

[0012] Figure 2 It is a schematic diagram of the connection structure between the exhaust pipe and the CEMS analyzer of the utility model.

[0013] Among them: 1. Exhaust pipe; 2. Sampling probe; 3. Heating pipeline; 4. CEMS analyzer; 5. Calibration port; 6. Sampling pump; 7. Electrochemical module interface; 8. Gas chamber; 9. Heating box; 10. Condenser; 11. Pipeline; 12. 1# three-way filter; 13. Check valve; 14. Solenoid valve; 15. Waste liquid barrel; 16. Electrochemical oxygen measurement module; 17. 2# three-way filter; 18. 3# three-way filter. DETAILED DESCRIPTION

[0014] The utility model will now be further described in detail with reference to the accompanying drawings.

[0015] like Figure 1-2 As shown, an online flue gas monitoring device under high CO conditions includes an exhaust chimney 1, a sampling probe 2 is installed at the sampling end of the exhaust chimney 1, the sampling probe 2 is connected to a CEMS analyzer 4 through a heating pipeline 3, a calibration port 5, a sampling pump 6, an electrochemical module interface 7, and a gas chamber 8 are arranged in the CEMS analyzer 4, the sampling pump 6 is connected to a heating box 9 and a condenser 10 in sequence through a pipeline 11, an air inlet end of the sampling pump 6 is connected to the calibration port 5 through a pipeline 11, a 1# three-way filter 12, and a check valve 13, the calibration port 5 is connected to a gas chamber 8 and a solenoid valve 14 in parallel through a pipeline 11 and a 2# three-way filter 17, a waste liquid barrel 15 and an electrochemical oxygen measurement module 16 are connected to the discharge end of the condenser 10 through a pipeline 11 and a 3# three-way filter 18 in parallel, and the electrochemical oxygen measurement module 16 is plugged into the electrochemical module interface 7.

[0016] Furthermore, the heating pipeline 3 is connected to the 1# three-way filter 12 , and the heating pipeline 3 is connected to the CEMS analyzer 4 through the 1# three-way filter 12 .

[0017] The working principle of the utility model is:

[0018] During monitoring, the sampling pump 6 in the CEMS analyzer 4 works, so that the flue gas in the exhaust pipe 1 passes through the sampling probe 2 and the heating pipeline 3 into the 1# three-way filter 12. At this time, the flue gas is divided into two paths. One path enters the heating box 9, the condenser 10, and the 3# three-way filter 18 in sequence. The moisture in the flue gas is condensed in the condenser 10, and the condensed flue gas is separated into gas and liquid in the 3# three-way filter 18. The water enters the waste liquid bucket 15 from the discharge end of the condenser 10, and the gas enters the electrochemical oxygen measurement module 16 for monitoring; the other path enters the gas chamber 8 from the calibration port 5 for calibration, and the excess flue gas is discharged through the solenoid valve 14. Under high carbon monoxide conditions, the oxygen content can be effectively monitored; compared with the cobalt oxide method, the chemical reaction of CO and O2 is reduced, avoiding the situation where the oxygen content measurement value is too low.

[0019] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention shall fall within the scope of protection of the present invention.

[0020] The technology, shape and structure parts not described in detail in the present invention are all known technologies.

Claims

1. An online flue gas monitoring device under high CO conditions, comprising an exhaust pipe, a sampling probe is installed at the sampling end of the exhaust pipe, the sampling probe is connected to a CEMS analyzer through a heating pipeline, the CEMS analyzer is provided with a calibration port, a sampling pump, an electrochemical module interface, and a gas chamber, and the sampling pump is sequentially connected to a heating box and a condenser through a pipeline, characterized in that: The air inlet end of the sampling pump is connected to the calibration port through a pipeline, a 1# three-way filter, and a check valve. The calibration port is connected in parallel with a gas chamber and a solenoid valve through a pipeline and a 2# three-way filter. The discharge end of the condenser is connected in parallel with a waste liquid bucket and an electrochemical oxygen measurement module through a pipeline and a 3# three-way filter. The electrochemical oxygen measurement module is plugged into the electrochemical module interface.

2. The flue gas online monitoring device under high CO conditions according to claim 1, characterized in that: The heating pipeline is connected to the 1# three-way filter, and the heating pipeline is connected to the CEMS analyzer through the 1# three-way filter.

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