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On-line ammonia detection device in continuous annealing furnace and its application method

A continuous annealing furnace and detection device technology, applied in the direction of electrochemical variables of materials, etc., can solve the problems that manual analysis is difficult to meet the requirements of modern production, unfavorable batch detection, long time consumption, etc., to save time, improve timeliness, The effect of improving accuracy

Inactive Publication Date: 2011-12-14
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the analysis business requires accurate and fast conditions, manual analysis has been far from meeting the requirements of modern production
The original manual off-line analysis has its shortcomings: it takes a long time to send the sample to the laboratory for analysis, and the detection accuracy is low, which is not conducive to long-term batch detection

Method used

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  • On-line ammonia detection device in continuous annealing furnace and its application method
  • On-line ammonia detection device in continuous annealing furnace and its application method
  • On-line ammonia detection device in continuous annealing furnace and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The ammonia on-line detection device in the continuous annealing furnace is composed of an inlet pipe 1, a flow control valve 2 connected to the inlet pipe 1, a flow meter 3, a return gas valve 4, and a delivery pipe 5. An air pump 6 is installed on the intake pipe 1, a flow control valve 2 and a flow meter 3 are conventionally connected successively on the delivery pipe 5, and an absorption pool 7 is placed at the end of the delivery pipe 5 behind the flow meter 3 and inserted into the absorption pool 7; in the PLC The controller 11 is respectively connected to the sulfuric acid tube 8, the sodium hydroxide tube 9 and the pH electrode 10 through the signal line 15; between the PLC controller 11 and the sulfuric acid tube 8 and between the PLC controller 11 and the sodium hydroxide tube 9 Connect the electromagnetic valve 13 respectively; Set the outlet end of the sulfuric acid pipe 8 and the sodium hydroxide pipe 9 and the exhaust pipe 13 above the liquid level in the a...

Embodiment 2

[0047] The ammonia on-line detection device in the continuous annealing furnace is the same as that in Example 1.

[0048] A method for using an online ammonia detection device in a continuous annealing furnace, the steps of which are:

[0049] 1), the concentration is that the sulfuric acid solution of 0.2mol / L is added into 0.085 liters in the absorption pool 7 through the sulfuric acid pipe 8;

[0050] 2), open the air pump 6 and the flow control valve 2, and input the gas in the continuous annealing furnace into the absorption pool 7 at a rate of 2.0 liters / minute, and the inflow time is 1.5 minutes, and stand for 4 minutes;

[0051] 3), in the absorption pool 7, drip the sodium hydroxide solution with a concentration of 0.5mol / L through the sodium hydroxide tube 9, titrate to the end point, and stir while dripping until uniform;

[0052] 4), use the pH electrode 10 to indicate the titration end point;

[0053] 5), the calculation formula will be: c ...

Embodiment 3

[0059] The ammonia on-line detection device in the continuous annealing furnace is the same as that in Example 1.

[0060] A method for using an online ammonia detection device in a continuous annealing furnace, the steps of which are:

[0061] 1), the sulfuric acid solution that concentration is 0.3mol / L is added into 0.075 liters in the absorption pool 7 through the sulfuric acid tube 8;

[0062] 2), open the air pump 6 and the flow control valve 2, the gas in the continuous annealing furnace is input in the absorption pool 7 with the speed of 2.5 liters / minute, and its inflow time is 1 minute, and stands still for 4.5 minutes;

[0063] 3), in the absorption pool 7, drip the sodium hydroxide solution with a concentration of 0.5mol / L through the sodium hydroxide tube 9, titrate to the end point, and stir while dripping until uniform;

[0064] 4), use the pH electrode 10 to indicate the titration end point;

[0065]5), the calculation formula will be: c ...

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Abstract

The invention relates to an online detection device for ammonia content in the atmosphere in a continuous annealing furnace and a use method. The device of the present invention is composed of an air inlet pipe 1, a flow control valve 2, a flow meter 3, a return gas valve 4, and a delivery pipe 5. An air pump 6 is arranged on the air inlet pipe 1, and an absorption pool is arranged at the end of the delivery pipe 5 behind the flowmeter 3. 7; Sulfuric acid tube 8, sodium hydroxide tube 9 and PH electrode 10 are respectively established on the absorption pool 7; the PLC controller 11 is respectively connected with the sulfuric acid tube 8, sodium hydroxide tube 9, PH electrode 10, and computer 12, and the PLC A solenoid valve 13 is respectively arranged between the controller 11 and the sulfuric acid pipe 8 and the sodium hydroxide pipe 9. Method of use: Add sulfuric acid solution into the absorption pool 7; make the gas input into the absorption pool 7; titrate the sodium hydroxide solution to the end point and stir until uniform; the pH electrode 10 indicates the titration end point; The waste liquid in 7 is discharged and all the pipelines are cleaned with distilled water; then filled with distilled water.

Description

technical field [0001] The invention relates to a material detection device and a use method thereof, and more belongs to an online detection device and a use method thereof for the ammonia content in the atmosphere of a continuous annealing furnace. Background technique [0002] Detecting and analyzing the concentration of ammonia in the atmosphere in the continuous annealing furnace of oriented silicon steel is a newly developed analysis business in China. Originally, because there were no strict requirements for the analysis in this aspect, the method of manual sampling and offline manual testing was adopted. As the analysis business requires accurate and fast conditions, manual analysis has been far from meeting the requirements of modern production. The original manual off-line analysis has its shortcomings: it takes a long time to send the sample to the laboratory for analysis, and the detection accuracy is low, which is not conducive to long-term batch detection. S...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/44
Inventor 李小杰王新海古兵平沈克邱忆黄双孙竹郭芳刘新业吕燕南
Owner 武钢集团有限公司
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