IP Library Granted Patent US 8,404,020
Granted Patent B2
US 8,404,020 · App. 12/203,713 · Granted Mar 26, 2013

Systems and methods for monitoring a rapping process

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Quick Facts
Patent No.
US 8,404,020
App. No.
12/203,713
Granted
Mar 26, 2013
Kind
B2
Abstract

A method for monitoring operation of a rapper in an electrostatic precipitator using a rapper control system is described. The method includes determining model electrical characteristics of the rapper. The model electrical characteristics of the rapper correspond to model mechanical operating characteristics of the rapper. The method also includes storing data corresponding to the model electrical characteristics and the model mechanical operating characteristics of the rapper, determining actual electrical characteristics of the rapper, and comparing the actual electrical characteristics of the rapper to the stored model electrical characteristics to determine actual mechanical operating characteristics of the rapper.

Claims (25)

1. A method for monitoring operation of a rapper in an electrostatic precipitator using a rapper control system, said method comprising:

determining model electrical characteristics of the rapper, wherein the model electrical characteristics of the rapper correspond to model mechanical operating characteristics of the rapper;

storing data corresponding to the model electrical characteristics and the model mechanical operating characteristics of the rapper;

determining actual electrical characteristics of the rapper; and

comparing the actual electrical characteristics of the rapper to the stored model electrical characteristics to determine corresponding model mechanical operating characteristics of the rapper; and

determining actual mechanical operating characteristics of the rapper based on the model mechanical operating characteristics that correspond to the compared actual and model electrical characteristics of the rapper.

2. A method in accordance with claim 1 , wherein determining model electrical characteristics of the rapper comprises determining a plurality of complex impedances of the rapper that correspond to model mechanical operating characteristics of the rapper, wherein model mechanical operating characteristics comprise at least one of a model rapper hammer lift height and a model rapper hammer velocity.

3. A method in accordance with claim 1 , wherein determining model electrical characteristics of the rapper comprises at least one of testing and monitoring a substantially similar rapper to the rapper in the electrostatic precipitator.

4. A method in accordance with claim 1 , wherein determining actual mechanical operating characteristics of the rapper further comprises at least one of:

identifying a presence of at least one of an internal rapper fault condition and an open or short condition; and

determining at least one of an actual lift height of a rapper hammer, an actual rapper hammer velocity, and an efficiency of the rapper.

5. A method in accordance with claim 4 further comprising determining at least one of a specific time to energize the rapper and an amount of current with which to energize the rapper to control a time when the rapper hammer strikes an electrostatic plate.

6. A method in accordance with claim 1 further comprising adjusting at least one of a load voltage and a load current to facilitate substantially matching the actual mechanical operating characteristics of the rapper with stored predetermined model mechanical operating characteristics.

7. A method in accordance with claim 1 , wherein determining model electrical characteristics of the rapper comprises:

determining a model velocity of a rapper plunger under a plurality of different model load resistance conditions; and

storing, in a memory, data corresponding to the model velocities and model load resistance conditions.

8. A method in accordance with claim 7 , wherein determining actual electrical characteristics of the rapper comprises:

monitoring a load voltage and a load current provided to the rapper with respect to time;

measuring an actual back electromotive force (EMF) produced by the rapper plunger during operation of the rapper;

determining the load resistance condition that creates the measured back EMF; and

determining the actual velocity of the rapper by comparing the determined load resistance to the model load resistance.

9. A method in accordance with claim 1 , wherein determining actual electrical characteristics of the rapper comprises:

monitoring a load voltage and a load current supplied to the rapper with respect to time;

measuring a phase differential between the load voltage and the load current; and

calculating actual electrical characteristics of the rapper based on the measured phase differential.

Assignments (12)
SECURITY INTEREST Recorded Jul 18, 2025
From: BABCOCK & WILCOX ENTERPRISES, INC.; THE BABCOCK & WILCOX COMPANY; DIAMOND POWER INTERNATIONAL, LLC; BABCOCK & WILCOX SPIG, INC.; BABCOCK & WILCOX CANADA CORP.; BABCOCK & WILCOX FPS INC.
To: B. RILEY FINANCIAL, INC.
Reel/Frame 072053/0943 →
SECURITY INTEREST Recorded May 23, 2025
From: BABCOCK & WILCOX ENTERPRISES, INC.; THE BABCOCK & WILCOX COMPANY; DIAMOND POWER INTERNATIONAL, LLC; BABCOCK & WILCOX SPIG, INC.; BABCOCK & WILCOX CANADA CORP.; BABCOCK & WILCOX FPS INC.
To: GLAS TRUST COMPANY LLC
Reel/Frame 071371/0835 →
SECURITY INTEREST Recorded Mar 3, 2025
From: BABCOCK & WILCOX ENTERPRISES, INC.; THE BABCOCK & WILCOX COMPANY; DIAMOND POWER INTERNATIONAL, LLC; BABCOCK & WILCOX SPIG, INC.; BABCOCK & WILCOX CANADA CORP.; BABCOCK & WILCOX FPS INC.
To: PENSION BENEFIT GUARANTY CORPORATION
Reel/Frame 070380/0647 →
RELEASE OF SECURITY INTEREST Recorded Sep 13, 2024
From: MSD PCOF PARTNERS XLV, LLC
To: THE BABCOCK & WILCOX COMPANY; DIAMOND POWER INTERNATIONAL, LLC; AMERICON LLC
Reel/Frame 069017/0362 →
SECURITY INTEREST Recorded Jan 19, 2024
From: BABCOCK & WILCOX ENTERPRISES, INC.; THE BABCOCK & WILCOX COMPANY; DIAMOND POWER INTERNATIONAL, LLC; BABCOCK & WILCOX SPIG, INC.; BABCOCK & WILCOX CANADA CORP.; BABCOCK & WILCOX FPS INC.
To: AXOS BANK, AS ADMINISTRATIVE AGENT
Reel/Frame 066354/0765 →
SECURITY INTEREST Recorded Jul 22, 2021
From: THE BABCOCK & WILCOX COMPANY (F/K/A BABCOCK & WILCOX POWER GENERATION GROUP, INC.); BABCOCK & WILCOX SPIG, INC.; BABCOCK & WILCOX TECHNOLOGY, LLC; DIAMOND POWER INTERNATIONAL, LLC (F/K/A DIAMOND POWER INTERNATIONAL, INC.)
To: MSD PCOF PARTNERS XLV, LLC, AS AGENT
Reel/Frame 056962/0486 →
RELEASE OF SECURITY INTEREST Recorded Jul 1, 2021
From: BANK OF AMERICA, N.A.
To: DIAMOND POWER INTERNATIONAL, LLC (F/K/A DIAMOND POWER INTERNATIONAL, INC.); MEGTEC TURBOSONIC TECHNOLOGIES, INC.; THE BABCOCK & WILCOX COMPANY (F/K/A BABCOCK & WILCOX POWER GENERATION GROUP, INC.); BABCOCK & WILCOX SPIG, INC.; BABCOCK & WILCOX TECHNOLOGY, LLC (F/K/A MCDERMOTT TECHNOLOGY, INC.); SOFCO-EFS HOLDINGS LLC; BABCOCK & WILCOX MEGTEC, LLC
Reel/Frame 057337/0823 →
RELEASE OF SECURITY INTEREST Recorded May 17, 2018
From: LIGHTSHIP CAPITAL LLC
To: BABCOCK & WILCOX ENTERPRISES, INC.; THE BABCOCK & WILCOX COMPANY; DIAMOND POWER INTERNATIONAL, LLC; BABCOCK & WILCOX MEGTEC, LLC; MEGTEC TURBOSONIC TECHNOLOGIES, INC.; BABCOCK & WILCOX UNIVERSAL, INC.; BABCOCK & WILCOX TECHNOLOGY, LLC
Reel/Frame 046182/0829 →
SECURITY INTEREST Recorded Aug 10, 2017
From: THE BABCOCK & WILCOX COMPANY; DIAMOND POWER INTERNATIONAL, LLC; BABCOCK & WILCOX MEGTEC, LLC; MEGTEC TURBOSONIC TECHNOLOGIES, INC.; BABCOCK & WILCOX UNIVERSAL, INC.; BABCOCK & WILCOX TECHNOLOGY, LLC
To: LIGHTSHIP CAPITAL LLC
Reel/Frame 043515/0001 →
CHANGE OF NAME Recorded Sep 24, 2015
From: BABCOCK & WILCOX POWER GENERATION GROUP, INC.
To: THE BABCOCK & WILCOX COMPANY
Reel/Frame 036675/0434 →
SECURITY INTEREST Recorded Jul 28, 2015
From: BABCOCK & WILCOX POWER GENERATION GROUP, INC. (TO BE RENAMED THE BABCOCK AND WILCOX COMPANY)
To: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 036201/0598 →
SECURITY INTEREST Recorded Jul 22, 2014
From: BABCOCK & WILCOX POWER GENERATION GROUP, INC.
To: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 033380/0744 →