阅读说明：本技术 一种袋式除尘器的破袋智能检测方法 (Bag breaking intelligent detection method of bag type dust collector ) 是由 刘艳 刘滨 胡建鹏 张翼 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种袋式除尘器的破袋智能检测方法,利用粉尘浓度监测仪实时采集袋式除尘器出风口处的实时粉尘浓度,并根据粉尘浓度并采用时间反溯定位法定位破袋的位置,且根据校正定位确定破袋的精准位置,破袋定位准确且快速,便于工作人员后续进行快速更换,保证袋式除尘器的正常使用。(The invention discloses an intelligent bag breaking detection method of a bag type dust collector, which is characterized in that a dust concentration monitor is used for acquiring real-time dust concentration at an air outlet of the bag type dust collector in real time, the position of a broken bag is positioned according to the dust concentration by adopting a time backtracking positioning method, the accurate position of the broken bag is determined according to correction positioning, the bag breaking positioning is accurate and quick, workers can conveniently and quickly replace the broken bag in the follow-up process, and the normal use of the bag type dust collector is ensured.)

1. The bag breaking intelligent detection method of the bag type dust collector is characterized by comprising the following steps of: a dust concentration monitor is installed at an air outlet of the bag type dust collector, and the dust concentration monitor and the pulse injection valve of each row of each bag chamber are connected with the controller to send the collected dust concentration value to the controller in real time;

the intelligent bag breaking detection method specifically comprises the following steps:

(1) firstly, taking a dust concentration value acquired by a dust concentration monitor when the bag-type dust collector is filtered without breaking a bag as a preset value VW01;

(2) the method comprises the following steps of (1) performing ash removal by adopting a line-by-line ash removal mode, namely, sequentially opening a pulse injection valve corresponding to each line of filter bag of each bag chamber by a controller, closing all other pulse injection valves when opening the pulse injection valve corresponding to any line of filter bag of any bag chamber, and opening the next pulse injection valve after closing the last pulse injection valve and spacing for a fixed time; when the dust concentration value VW11 acquired by the dust concentration monitor exceeds a preset value VW01, the controller records the time point at the moment as T, then the time delta T of dust from the break of the filter bag to the dust concentration monitor is subtracted, the controller searches the time record of the opening of each pulse injection valve, and therefore when the pulse injection valve m is opened at the time of T-delta T, one row of filter bags corresponding to the pulse injection valve m is broken;

(3) and correcting whether a row of filter bags corresponding to the pulse blowing valve m is damaged or not: firstly, before the bag-type dust collector performs the line-by-line ash removal for the second time, recording a dust concentration value acquired by a dust concentration monitor when the bag-type dust collector performs the filtration as a preset value VW02, closing a pulse injection valve m all the time when performing the line-by-line ash removal, and when the dust concentration value VW12 acquired by the dust concentration monitor in real time does not exceed the preset value VW02 all the time when performing the line-by-line ash removal again on the bag-type dust collector, indicating that a line of filter bags corresponding to the pulse injection valve m is damaged; when the dust concentration value VW12 collected by the dust concentration monitor exceeds a preset value VW02, it indicates that one row of filter bags corresponding to the pulse injection valve m is not damaged, and then it is detected whether the adjacent pulse injection valve m-1 and pulse injection valve m +1 are damaged: firstly, when a pulse injection valve m-1 is detected, when the bag type dust collector carries out line-by-line dust removal for the third time, the pulse injection valve m-1 is always closed, and when the dust concentration value VW13 acquired by a dust concentration monitor in real time does not exceed a preset value VW02, a line of filter bags corresponding to the pulse injection valve m-1 is damaged; when the pulse injection valve m +1 is detected, the pulse injection valve m +1 is always closed when the bag type dust collector carries out line-by-line ash removal for the fourth time, and when the dust concentration value VW14 acquired by the dust concentration monitor in real time does not exceed the preset value VW02, the fact that one line of filter bags corresponding to the pulse injection valve m +1 is damaged is explained.

2. The intelligent bag-breaking detection method of the bag type dust collector as claimed in claim 1, wherein: when the bag type dust collector is used for filtering without bag breaking, the controller sums the values collected by the dust concentration monitor every 0.5s in a set period to obtain an average value, and the average value is the preset value VW 01.

3. The intelligent bag-breaking detection method of the bag type dust collector as claimed in claim 1, wherein: before the bag type dust collector performs secondary, third or fourth line-by-line ash removal, the controller records the value collected by the dust concentration monitor every 0.5s in a set period during the filtration of the bag type dust collector, and the average value is the corresponding preset value VW02, VW03 or VW 04.

4. The intelligent bag-breaking detection method of the bag type dust collector as claimed in claim 1, wherein: when any row of filter bags are damaged, the controller sends the row of filter bags with broken bags to the display screen for bag breaking alarm display and indicator lamp alarm.

Technical Field

The invention relates to the field of bag type dust collectors, in particular to an intelligent detection method for bag breaking of a bag type dust collector.

Background

The working principle of the bag type dust collector is 'filtration-deashing-filtration', the filtration is to realize gas-solid separation through a filter bag and remove dust particles in dust-containing gas, the deashing is to open a pulse deashing valve on a bag chamber, compressed air enters the corresponding bag chamber from an air storage tank so as to remove dust accumulated on the filter bag of the bag chamber, and the filtration performance of the filter bag is recovered again. The existing ash removal modes mostly adopt online ash removal, namely, the normal filtering use of the bag type dust collector is not influenced by opening the poppet valve and simultaneously filtering the ash.

After the existing bag type dust collector is used for a period of time, the filter bag can be damaged due to mechanical, physical and chemical reasons, and once the bag is broken, the filtering effect of the dust collector can be greatly reduced, and the dust discharge concentration exceeds the standard. How to accurately find the position of the broken bag in time and change the bag becomes a problem which needs to be solved urgently.

Disclosure of Invention

The invention aims to provide an intelligent detection method for broken bags of a bag type dust collector, which can determine the position of the broken bag in an initial stage and accurately correct and position the broken bag in a line-by-line dust cleaning mode of the bag type dust collector, thereby ensuring the accurate positioning of the broken bag, facilitating the subsequent quick replacement of workers and ensuring the normal use of the bag type dust collector.

The technical scheme of the invention is as follows:

a bag breaking intelligent detection method of a bag type dust collector is characterized in that a dust concentration monitor is installed at an air outlet of the bag type dust collector, and the dust concentration monitor and a pulse injection valve of each row of each bag chamber are connected with a controller to send collected dust concentration values to the controller in real time;

the intelligent bag breaking detection method specifically comprises the following steps:

(1) firstly, taking a dust concentration value acquired by a dust concentration monitor when the bag-type dust collector is filtered without breaking a bag as a preset value VW01;

(2) the method comprises the following steps of (1) performing ash removal by adopting a line-by-line ash removal mode, namely, sequentially opening a pulse injection valve corresponding to each line of filter bag of each bag chamber by a controller, closing all other pulse injection valves when opening the pulse injection valve corresponding to any line of filter bag of any bag chamber, and opening the next pulse injection valve after closing the last pulse injection valve and spacing for a fixed time; when the dust concentration value VW11 acquired by the dust concentration monitor exceeds a preset value VW01, the controller records the time point at the moment as T, then the time delta T of dust from the break of the filter bag to the dust concentration monitor is subtracted, the controller searches the time record of the opening of each pulse injection valve, and therefore when the pulse injection valve m is opened at the time of T-delta T, one row of filter bags corresponding to the pulse injection valve m is broken;

(3) and correcting whether a row of filter bags corresponding to the pulse blowing valve m is damaged or not: firstly, before the bag-type dust collector performs the line-by-line ash removal for the second time, recording a dust concentration value acquired by a dust concentration monitor when the bag-type dust collector performs the filtration as a preset value VW02, closing a pulse injection valve m all the time when performing the line-by-line ash removal, and when the dust concentration value VW12 acquired by the dust concentration monitor in real time does not exceed the preset value VW02 all the time when performing the line-by-line ash removal again on the bag-type dust collector, indicating that a line of filter bags corresponding to the pulse injection valve m is damaged; when the dust concentration value VW12 collected by the dust concentration monitor exceeds a preset value VW02, it indicates that one row of filter bags corresponding to the pulse injection valve m is not damaged, and then it is detected whether the adjacent pulse injection valve m-1 and pulse injection valve m +1 are damaged: firstly, when a pulse injection valve m-1 is detected, when the bag type dust collector carries out line-by-line dust removal for the third time, the pulse injection valve m-1 is always closed, and when the dust concentration value VW13 acquired by a dust concentration monitor in real time does not exceed a preset value VW02, a line of filter bags corresponding to the pulse injection valve m-1 is damaged; when the pulse injection valve m +1 is detected, the pulse injection valve m +1 is always closed when the bag type dust collector carries out line-by-line ash removal for the fourth time, and when the dust concentration value VW14 acquired by the dust concentration monitor in real time does not exceed the preset value VW02, the fact that one line of filter bags corresponding to the pulse injection valve m +1 is damaged is explained.

When the bag type dust collector is used for filtering without bag breaking, the controller sums the values collected by the dust concentration monitor every 0.5s in a set period to obtain an average value, and the average value is the preset value VW 01.

Before the bag type dust collector performs secondary, third or fourth line-by-line ash removal, the controller records the value collected by the dust concentration monitor every 0.5s in a set period during the filtration of the bag type dust collector, and the average value is the corresponding preset value VW02, VW03 or VW 04.

When any row of filter bags are damaged, the controller sends the row of filter bags with broken bags to the display screen for bag breaking alarm display and indicator lamp alarm.

The invention has the advantages that:

the bag breaking positioning method adopts a time backtracking positioning method to position the bag breaking position, and determines the accurate position of the bag breaking according to the correction positioning, so that the bag breaking positioning is accurate and quick, the subsequent quick replacement of workers is facilitated, and the normal use of the bag type dust collector is ensured.

Drawings

FIG. 1 is a schematic diagram of the construction of a bag house dust collector of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, an intelligent detection method for bag breaking of a bag type dust collector is characterized in that firstly, a dust concentration monitor 2 is installed at an air outlet 1 of the bag type dust collector, the dust concentration monitor 2 and a pulse injection valve 5 corresponding to each row of filter bags 4 of each bag chamber 3 are connected with a controller, and collected dust concentration values are sent to the controller in real time;

the intelligent bag breaking detection method specifically comprises the following steps:

(1) firstly, taking a dust concentration value acquired by a dust concentration monitor 2 when the bag-type dust collector is filtered without breaking a bag as a preset value VW01;

(2) the ash removal is carried out by adopting a line-by-line ash removal mode, namely, the controller sequentially opens the pulse injection valve 5 corresponding to each line of filter bag 4 of each bag chamber 3, when the pulse injection valve 5 corresponding to any line of filter bag of any bag chamber is opened, all other pulse injection valves 5 are closed, and the adjacent pulse injection valve 5 is opened after the last pulse injection valve 5 is closed and spaced for a fixed time; when the dust concentration value VW11 acquired by the dust concentration monitor 2 exceeds a preset value VW01, the controller records the time point at the moment as T, then the time delta T of dust from the break of the filter bag 4 to the dust concentration monitor 2 is subtracted, and the controller searches the time record of the opening of each pulse injection valve 5, so that when the pulse injection valve m is opened at the moment of T-delta T, one row of filter bags corresponding to the pulse injection valve m is broken;

(3) and correcting whether a row of filter bags corresponding to the pulse blowing valve m is damaged or not: firstly, before the bag-type dust collector performs the line-by-line ash removal for the second time, recording a dust concentration value acquired by the dust concentration monitor 2 when the bag-type dust collector performs the filtration as a preset value VW02, closing the pulse injection valve m all the time when performing the line-by-line ash removal, and when the dust concentration value VW12 acquired by the dust concentration monitor 2 in real time does not exceed the preset value VW02 all the time when the bag-type dust collector performs the line-by-line ash removal again, indicating that one line of filter bags 4 corresponding to the pulse injection valve m is damaged; when the dust concentration value VW12 collected by the dust concentration monitor 2 exceeds the preset value VW02, it indicates that the filter bag 4 corresponding to the pulse injection valve m is not damaged, and then it is detected whether the adjacent pulse injection valve m-1 and pulse injection valve m +1 are damaged: firstly, when a pulse injection valve m-1 is detected, when the bag type dust collector carries out line-by-line dust removal for the third time, the pulse injection valve m-1 is always closed, and when the dust concentration value VW13 acquired by the dust concentration monitor 2 in real time does not exceed the preset value VW02, the fact that a line of filter bags 4 corresponding to the pulse injection valve m-1 is damaged is indicated; when the pulse injection valve m +1 is detected, when the bag type dust collector carries out line-by-line dust removal for the fourth time, the pulse injection valve m +1 is always closed, and when the dust concentration value VW14 acquired by the dust concentration monitor 2 in real time does not exceed the preset value VW02, the fact that one line of filter bags 4 corresponding to the pulse injection valve m +1 is damaged is indicated;

(4) and when any row of filter bags is damaged, the controller sends the row of filter bags 4 with broken bags to the display screen for bag breaking alarm display and indicator lamp alarm.

When the bag-type dust collector is used for filtering without bag breaking, the controller sums the values collected by the dust concentration monitor 2 every 0.5s in a set period to obtain an average value, and the average value is a preset value VW01; before the bag-type dust collector performs the second, third or fourth row-by-row ash removal, the controller records the values collected by the dust concentration monitor 2 every 0.5s in a set period during the filtration of the bag-type dust collector, and the average values are added and averaged, namely the corresponding preset values VW02, VW03 or VW 04.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.