Method for online monitoring the operating state of environmental dedusting system

A technology of dust removal system and operation status, which is applied in the testing, measuring devices, instruments of machines/structural parts, etc., can solve problems such as environmental pollution, inconvenient management and maintenance, and mismatch of air volume of dust removal system, so as to ensure normal operation and improve dust removal. effect of effect

Inactive Publication Date: 2019-04-05

SHANGHAI JINYI INSPECTION TECH

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AI-Extracted Technical Summary

Problems solved by technology

[0004] 1) The on-site dust removal equipment is widely distributed, and management and maintenance are inconvenient. It mainly relies on manual inspection, and the accuracy and effectiveness of equipment status control are not high;

[0005] 2) Some key parameters still adopt the offline collection mode, which cannot continuously detect the emission of the dust removal system, and the monitoring data has a certain lag, and cannot guide the maintenance of the dust removal equipment in time;

[0006] 3) The information is scattered, and the monitoring of equipment operation, equipment status and process co...

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Method used

Step 4, collect the dust concentration monitor output signal Ei of each dust collector chamber, set the dust collector chamber dust concentration standard value Esi, when dust collector chamber dust concentration Ei>ESi, show this dust collector chamber If the dust collecti...

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Abstract

The invention discloses a method for online monitoring the operating state of an environmental dedusting system. The method comprises the steps of: collecting dust concentration data of an environmental dedusting system outlet and each deduster chamber, the vibration signals of a motor and a fan bearing seat, and the pressure and flow parameters of a pipeline system; setting a discharge concentration standard value for the environmental dedusting system outlet and each deduster chamber, and giving an alarm when measured data is larger than the standard value; correcting and determining the actual pressure of a pipeline monitoring point according to relevant parameters of the pipeline system; and obtaining a vibration amplitude component of the motor and the fan respectively from output signals of vibration acceleration sensor, setting a health state factor for the motor and the fan, and giving an alarm when the health state factor is less than zero, wherein the health state factor is calculated from the vibration amplitude component. The method monitors the discharge concentration of the environmental dedusting system, the state of the pipeline system and each deduster chamber, andthe vibration of the motor and the fan in real time, manages the trend, and early warns when a fault occurs to ensure the normal operation of the system and improve the dedusting effect.

Application Domain

Structural/machines measurement

Technology Topic

Vibration accelerationTraffic volume +3

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Examples

Experimental program(1)

Example Embodiment

[0033] Implementation example figure 1 As shown, the online monitoring method for the operation status of the environmental protection dust removal system of the present invention includes the following steps:

[0034] Step 1: Set up dust concentration monitors at the outlet of the environmental protection dust removal system and each dust collector chamber, set vibration acceleration sensors on the bearing seats of the rolling bearings of each motor and fan, and collect the pressure and flow parameters of the pipeline system at the same time;

[0035] Step 2: Collect the output signal E of the dust concentration monitor from the outlet of the environmental protection dust removal system out , Set the emission concentration standard value E of the environmental protection dust removal system s; When the outlet dust concentration E out E s When, the online monitoring system sends an alarm signal;

[0036] Step 3: According to the pressure parameter P, the flow parameter Q of the pipeline system and the pipe diameter D and length L of the pipeline, calculate the flow velocity V of the pipeline monitoring point and the straight pipe resistance coefficient ξ;

[0037] V=Q/2826/D 2 (1)

[0038] ξ=0.0175×D -0.21 ×V -0.075 ×L (2)

[0039] Pipeline pressure loss is divided into loss along the way and local loss. The local resistance is formed by the pipeline attachment, which is proportional to the local resistance coefficient λ and dynamic pressure. The local resistance coefficient λ is obtained by searching the manual according to the type and opening of the pipeline attachment;

[0040] ΔP=Σλ×L/D×(V 2 /2g)+ΣξV 2 /2g (3)

[0041] In formula (3), ΔP is the pipeline pressure loss, and g is the acceleration due to gravity;

[0042] According to formula (3), the actual pressure of the pipeline monitoring point is determined to be P-ΔP;

[0043] Step 4. Collect the output signal Ei of the dust concentration monitor of each dust collector chamber, and set the standard value of dust concentration in the dust collector chamber Esi, when the dust concentration in the dust collector chamber E i E Si At the time, it indicates that the dust collecting bag of the dust collector chamber is damaged, the online monitoring system alarms, and displays the damaged position of the dust collecting bag, and the dust collector chamber is disabled to avoid excessive dust concentration at the outlet of the environmental protection dust removal system;

[0044] Step 5. Collect the vibration signal Yi output by each vibration acceleration sensor, analyze the vibration signal Yi, and extract the total vibration value G of the motor and the vibration at the frequency of 1 times, 2 times, and 3 times of the speed. The amplitude component Xi(t), where i is 1, 2, 3;

[0045] Set the motor health factor of the environmental protection dust removal system as Ψ m ,

[0046] then

[0047] When Ψ m <0, the online monitoring system predicts that the motor is in poor health, and the online monitoring system gives an alarm;

[0048] Step 6: Collect the vibration signal Yi output by each vibration acceleration sensor, perform vibration spectrum analysis on the vibration signal Yi, and extract the total vibration value H of the fan and the vibration at the frequency of 1 times the speed, 2 times the speed, and 3 times the speed. The amplitude component Zi(t), where i is 1, 2, 3;

[0049] Set the fan health factor of the environmental protection dust removal system as Ψ f ,

[0050] then

[0051] When Ψ f <0, the online monitoring system predicts that the environmental fan is in poor health, and the online monitoring system gives an alarm.

[0052] Preferably, the emission concentration standard value E of the environmental protection dust removal system s Set to 10mg/Nm 3 , The standard value of dust concentration in the dust collector chamber Esi is set to 30mg/Nm 3.

[0053] Preferably, the pipeline attachment includes an elbow, a tee and a valve.

[0054] This method makes up for the lack of effective utilization of the current online monitoring information of the environmental protection dust removal system operation status, reconstructs the vibration information to obtain the characteristic information of the environmental protection dust removal system motor and fan, and uses health indicators to monitor the degradation trend of the environmental protection dust removal system status. At the same time, the outlet of the environmental protection dust removal system and the dust concentration of each dust collector warehouse are monitored to ensure that the discharge meets the environmental protection requirements. Among them, the online monitoring system gives an alarm through the indicator light, the red light indicates that the environmental protection dust removal system is operating abnormally, and the green light indicates that the environmental protection dust removal system is operating normally.

[0055] This method can guide equipment managers to take response measures to system alarms, avoid the unplanned shutdown of equipment caused by the outlet dust concentration caused by the damage of the dust collection bag of the dust removal warehouse, and the failure of the environmental protection dust removal system motor and fan, and support the environmental protection dust removal system equipment Normal operation.

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Classification and recommendation of technical efficacy words

Guaranteed uptime
Improve dust removal effect

Method for online monitoring the operating state of environmental dedusting system

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

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Examples

Example Embodiment

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Description & Claims & Application Information

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