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Device and method for controlling blowing and automatic calibration of CEMS (Continuous Emission Monitoring System) by timer

A time timer and automatic calibration technology, which is applied in general control systems, control/regulation systems, program control, etc., can solve problems such as inaccurate timing and environmental pollution, achieve increased stability, avoid environmental pollution incidents, and monitor stability Effect

Pending Publication Date: 2021-10-22
华能鹤岗发电有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a time timer to control CEMS system purging and automatic calibration device and method, aiming to solve the problem of environmental pollution caused by inaccurate timing

Method used

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  • Device and method for controlling blowing and automatic calibration of CEMS (Continuous Emission Monitoring System) by timer
  • Device and method for controlling blowing and automatic calibration of CEMS (Continuous Emission Monitoring System) by timer
  • Device and method for controlling blowing and automatic calibration of CEMS (Continuous Emission Monitoring System) by timer

Examples

Experimental program
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specific Embodiment

[0036] Set the time timer to send out a DO1 signal of type 3S pulse at 0 minutes per hour, use the 24V power supply to provide power for the automatic calibration signal of the CEMS analyzer, and redesign the logic in the PLC.

[0037] System purge:

[0038] After the PLC receives the DO1 signal (I0.4), it sets the purge mode start command V32.2 to 1, and resets the command V32.4 to control all systems to resume normal operation to 0, such as image 3 As shown, the system enters the normal purge mode at this time and starts to purge. In the figure, R in the coil indicates that the output is 0 after it is turned on, and S in the coil indicates that the output is 1 after it is turned on.

[0039] When V32.2 is set to 1, such as Figure 4 As shown, the time relay T111 starts timing for 180 seconds, and the analog data stops passing through M10.1, such as Figure 6 As shown, when V32.2 is reset to 0, the delay is 420 seconds, and the data transmission returns to normal.

[0040...

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Abstract

The invention discloses a device and a method for controlling blowing and automatic calibration of a CEMS (continuous emission monitoring system) by a timer, the device comprises the timer, a PLC (programmable logic controller) and the CEMS, the timer is connected with the PLC and used for regularly sending time signals to the PLC, the PLC is connected with the CEMS and is used for controlling the CEMS to perform purging and automatic calibration according to a time signal sent by the timer; and the PLC logic is started through the time controller to complete data retention, the CEMS system is purged, and the analyzer is automatically calibrated, so that the stability and reliability of the system are improved, the environmental protection data monitoring stability is ensured, and environmental pollution events are avoided.

Description

technical field [0001] The invention relates to the technical field of computer industrial control, in particular to a device and method for controlling the purge and automatic calibration of a CEMS system by a time timer. Background technique [0002] In the prior art, the time interval between CEMS system triggering system blowback and automatic calibration signal is timed by PLC, and the timer in PLC can only do rough calculation and cannot achieve GPS time accuracy. Therefore, system backflush and automatic calibration Time has always been flawed. Generally, the logic in the PLC is designed to trigger another purge after 1 hour of timing after each purge. This logic is repeated when the PLC is running all the time. However, the hours of the PLC timer are offset, causing each purge Deviating from the actual time, the system data display is abnormal during the system backflushing and automatic calibration time period, resulting in poor automatic adjustment quality of desu...

Claims

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Application Information

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IPC IPC(8): G01N33/00G01N15/06G05B19/05
CPCG01N33/0004G01N33/0006G01N15/06G05B19/05G05B19/054G05B2219/1103
Inventor 陈龙陈金洲郎绪婷
Owner 华能鹤岗发电有限公司
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