CN113680159A - Bag-type dust collector back-blowing control method suitable for dry quenching environment dust removal system - Google Patents
Bag-type dust collector back-blowing control method suitable for dry quenching environment dust removal system Download PDFInfo
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- CN113680159A CN113680159A CN202110996955.7A CN202110996955A CN113680159A CN 113680159 A CN113680159 A CN 113680159A CN 202110996955 A CN202110996955 A CN 202110996955A CN 113680159 A CN113680159 A CN 113680159A
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- line valve
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- 239000000428 dust Substances 0.000 title claims abstract description 63
- 238000007664 blowing Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000010791 quenching Methods 0.000 title claims abstract description 17
- 230000000171 quenching effect Effects 0.000 title claims abstract description 17
- 238000004140 cleaning Methods 0.000 claims abstract description 13
- 239000004744 fabric Substances 0.000 claims description 6
- 230000003111 delayed effect Effects 0.000 claims description 4
- 238000001914 filtration Methods 0.000 abstract description 10
- 238000005299 abrasion Methods 0.000 abstract description 4
- 238000011010 flushing procedure Methods 0.000 abstract description 4
- 230000005484 gravity Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/04—Cleaning filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/446—Auxiliary equipment or operation thereof controlling filtration by pressure measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/46—Auxiliary equipment or operation thereof controlling filtration automatic
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a back blowing control method of a bag-type dust collector suitable for a dust removal system in a dry quenching environment, which comprises the following steps: s1, introducing a fan rotating speed signal into a bag-type dust collector PLC, and interlocking a bag-type dust collector back-blowing signal with the fan rotating speed; s2, judging whether the rotating speed of the fan is low or not by the PLC, and judging whether the air source pressure is normal or not; s3, when the air source pressure is normal, reading the current latched ash removal parameters, closing the off-line valve of the corresponding bin, and starting the bin and pulse for ash removal; s4, opening an off-line valve on the next chamber corresponding to the chamber with ash removed in S3, closing the off-line valve, judging whether the off-line valve is closed in place, starting a pulse valve of the chamber to remove ash, and repeating the action of other chambers; and S5, opening the off-line valve corresponding to the last bin, entering the ash cleaning period for waiting, and judging whether the ash cleaning period is finished. The invention has the advantages that: ensuring the filtering precision during back flushing and reducing the abrasion of the filter bag.
Description
Technical Field
The invention relates to the technical field of bag-type dust removal, in particular to a bag-type dust remover back-blowing control method suitable for a dry quenching environment dust removal system.
Background
The dry quenching environment dust remover generally adopts an off-line back-blowing pulse bag dust remover, and when dust collected on the surface of a bag reaches a certain thickness and the resistance of the dust remover is high, dust deposited on a filter bag needs to be cleaned in a compressed air back-blowing mode.
The bag-type dust collector generally adopts an off-line dust cleaning mode to carry out back flushing, namely before back flushing is started, an off-line valve of a chamber needs to be closed, gas needing to be filtered does not flow through a filter bag of the chamber, and compressed air is controlled by a pulse valve to carry out back flushing on the filter bag in sequence; after the back blowing is finished, dust on the surface of the filter bag falls into the dust bin along with gravity, and the surface resistance of the filter bag is reduced; then the off-line valve is opened and the chamber is put into use. And the filter bags of all the chambers are subjected to ash removal in a mode of sequentially opening and closing off-line valves of other chambers.
The disadvantages of this ash removal method are: when the ash removal of one bin is closed, because the filtering area is reduced, the filtering wind speed of other bins is forced to be improved, and the filtering speed is N/(N-1) times of the full filtering speed (wherein N is the number of the bins), so that the dust filtering precision is reduced, and the abrasion of a filter bag is aggravated.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a bag-type dust collector back-blowing control method which ensures the filtering precision during back-blowing and reduces the abrasion of a filter bag and is suitable for a dry quenching environment dust collection system.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a back-blowing control method of a bag-type dust collector suitable for a dry quenching environment dust removal system comprises the following steps:
s1, introducing a fan rotating speed signal into a bag-type dust collector PLC, and interlocking a bag-type dust collector back-blowing signal with the fan rotating speed;
s2, the PLC judges whether the rotating speed of the fan is low, and when the rotating speed of the fan is low, the PLC judges whether the air source pressure is normal;
s3, when the air source pressure is normal, reading the current latched ash removal parameters, wherein the ash removal parameters comprise the number Y of chambers and the pulse number Z, closing the off-line valve corresponding to the chamber according to the latched ash removal parameters, judging whether the off-line valve corresponding to the chamber is closed in place, and after the off-line valve is closed in place, starting the pulse valve of the chamber for ash removal after time delay until the last pulse valve of the chamber is blown;
s4, opening an off-line valve on the next bin corresponding to the ash-cleaned bin in the S3, judging whether the off-line valve is opened in place or not, closing the off-line valve after delaying, judging whether the off-line valve is closed in place or not, closing the off-line valve in place, starting the bin pulse valve to clean ash after delaying, and repeating the action of other bins until the last pulse valve of the bin is blown;
s5, opening an off-line valve corresponding to the last bin, entering a dust cleaning period to wait, judging whether the dust cleaning period is finished or not, judging whether the pressure difference of the cloth bag is higher than a set value or not, and finishing the period when the dust cleaning period is finished and the pressure difference of the cloth bag is higher than the set value.
Further, when the rotating speed of the fan is high, storing current ash removal parameters, latching the current chamber number Y and the pulse number Z, stopping blowing of the corresponding pulse valve, opening the corresponding chamber offline valve, judging whether the corresponding chamber offline valve is opened in place, when the offline valve is opened in place, continuously judging the rotating speed of the fan, and when the offline valve is not opened in place, sending an alarm signal after time delay.
Further, when the off-line valve is judged not to be closed in place in S3 and S4, an alarm signal is sent out in a delayed manner, and when the off-line valve is judged not to be opened in place in S4, an alarm signal is sent out in a delayed manner.
Further, before the PLC determines whether the fan speed is low in S2, the PLC determines whether there is an alarm signal, and when there is an alarm signal, after the alarm signal is reset, the PLC determines the fan speed.
Compared with the prior art, the invention has the advantages that: the bag-type dust remover back-blowing control method applicable to the dry quenching environment dust removal system is characterized in that in the operation process of a dust remover, a fan rotating speed signal is introduced into a bag-type dust remover PLC, the bag-type dust remover back-blowing signal and the fan rotating speed are interlocked, back blowing is only carried out when the fan is in a low rotating speed period, at the moment, although a bin is closed (off-line), the filtering speed does not exceed the full filtering speed when the maximum flow is achieved at the moment, so that the filtering precision during back blowing is ensured, and the abrasion of a filter bag is reduced.
Drawings
FIG. 1 is a first flow chart of a bag-type dust collector blowback control method suitable for a dry quenching environment dust removal system of the invention.
FIG. 2 is a flow chart II of a bag-type dust collector back-blowing control method suitable for a dry quenching environment dust removal system of the invention.
FIG. 3 is a flow chart III of a bag-type dust remover blowback control method suitable for a dry quenching environment dust removal system of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example one
A back-blowing control method of a bag-type dust collector suitable for a dry quenching environment dust removal system comprises the following steps:
s1, introducing a fan rotating speed signal into a bag-type dust collector PLC, and interlocking a bag-type dust collector back-blowing signal with the fan rotating speed;
s2, the PLC judges whether an alarm signal exists or not, the PLC judges whether the rotating speed of the fan is low or not, and when the rotating speed of the fan is low, the PLC judges whether the air source pressure is normal or not;
s3, when the air source pressure is normal, reading the current latched ash removal parameters including the number Y of the chambers and the pulse number Z, closing the off-line valve corresponding to the chamber according to the latched ash removal parameters, judging whether the off-line valve corresponding to the chamber is closed in place, and after the off-line valve is closed in place, starting the pulse valve of the chamber for ash removal after time delay until the last pulse valve of the chamber finishes blowing;
s4, opening an off-line valve on the next bin corresponding to the ash-cleaned bin in the S3, judging whether the off-line valve is opened in place or not, closing the off-line valve after delaying, judging whether the off-line valve is closed in place or not, closing the off-line valve in place, starting the bin pulse valve to clean ash after delaying, and repeating the action of other bins until the last pulse valve of the bin is blown;
s5, opening the off-line valve corresponding to the last bin, entering the ash cleaning period to wait, and judging whether the ash cleaning period is finished, and finishing the ash cleaning period and the period.
Example two
A back-blowing control method of a bag-type dust collector suitable for a dry quenching environment dust removal system comprises the following steps:
s1, introducing a fan rotating speed signal into a bag-type dust collector PLC, and interlocking a bag-type dust collector back-blowing signal with the fan rotating speed;
s2, the PLC judges whether an alarm signal exists or not, when the alarm signal exists, the PLC judges whether the rotating speed of the fan is low or not after the alarm signal is reset, when the rotating speed of the fan is high, the PLC stores the current ash removal parameters, latches the current chamber number Y and the pulse number Z, stops blowing of the corresponding pulse valve, opens the corresponding chamber offline valve, judges whether the corresponding chamber offline valve is opened in place or not, when the offline valve is opened in place, the PLC continues to judge the rotating speed of the fan, and when the rotating speed of the fan is low, judges whether the air source pressure is normal or not;
s3, when the air source pressure is normal, reading the current latched ash removal parameters, wherein the ash removal parameters comprise the number Y of chambers and the pulse number Z, closing the off-line valve corresponding to the chamber according to the latched ash removal parameters, judging whether the off-line valve corresponding to the chamber is closed in place, and after the off-line valve is closed in place, starting the pulse valve of the chamber for ash removal after time delay until the last pulse valve of the chamber is blown;
s4, opening an off-line valve on the next bin corresponding to the ash-cleaned bin in the S3, judging whether the off-line valve is opened in place or not, closing the off-line valve after delaying, judging whether the off-line valve is closed in place or not, closing the off-line valve in place, starting the bin pulse valve to clean ash after delaying, and repeating the action of other bins until the last pulse valve of the bin is blown;
s5, opening an off-line valve corresponding to the last bin, entering a dust cleaning period for waiting, judging whether the pressure difference of the cloth bag is higher than a set value, and ending the period when the pressure difference of the cloth bag is higher than the set value.
The present invention and its embodiments have been described, without limitation, and the embodiments shown in the drawings are only one embodiment of the present invention, and the actual configuration is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A back-blowing control method of a bag-type dust collector suitable for a dust removal system in a dry quenching environment is characterized by comprising the following steps:
s1, introducing a fan rotating speed signal into a bag-type dust collector PLC, and interlocking a bag-type dust collector back-blowing signal with the fan rotating speed;
s2, the PLC judges whether the rotating speed of the fan is low, and when the rotating speed of the fan is low, the PLC judges whether the air source pressure is normal;
s3, when the air source pressure is normal, reading the current latched ash removal parameters, wherein the ash removal parameters comprise the number Y of chambers and the pulse number Z, closing the off-line valve corresponding to the chamber according to the latched ash removal parameters, judging whether the off-line valve corresponding to the chamber is closed in place, and after the off-line valve is closed in place, starting the pulse valve of the chamber for ash removal after time delay until the last pulse valve of the chamber is blown;
s4, opening an off-line valve on the next bin corresponding to the ash-cleaned bin in the S3, judging whether the off-line valve is opened in place or not, closing the off-line valve after delaying, judging whether the off-line valve is closed in place or not, closing the off-line valve in place, starting the bin pulse valve to clean ash after delaying, and repeating the action of other bins until the last pulse valve of the bin is blown;
s5, opening an off-line valve corresponding to the last bin, entering a dust cleaning period to wait, judging whether the dust cleaning period is finished or not, judging whether the pressure difference of the cloth bag is higher than a set value or not, and finishing the period when the dust cleaning period is finished and the pressure difference of the cloth bag is higher than the set value.
2. The back-blowing control method of the bag-type dust collector suitable for the dry quenching environment dust removal system of claim 1, wherein: when the rotating speed of the fan is high, storing the current ash removal parameters, latching the current chamber number Y and the pulse number Z, stopping blowing of the corresponding pulse valve, opening the corresponding chamber offline valve, judging whether the corresponding chamber offline valve is opened in place, when the offline valve is opened in place, continuously judging the rotating speed of the fan, and when the offline valve is not opened in place, sending an alarm signal after delaying.
3. The back-blowing control method of the bag-type dust collector suitable for the dry quenching environment dust removal system of claim 1, wherein: and when the offline valve is judged not to be closed in place in S3 and S4, an alarm signal is sent out in a delayed manner, and when the offline valve is judged not to be opened in place in S4, an alarm signal is sent out in a delayed manner.
4. The back-blowing control method of the bag-type dust collector suitable for the dry quenching environment dust removal system of claim 1, wherein: and in the S2, before the PLC judges whether the rotating speed of the fan is low, the PLC judges whether an alarm signal exists, and when the alarm signal exists, after the alarm signal is reset, the PLC judges the rotating speed of the fan.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110996955.7A CN113680159A (en) | 2021-08-27 | 2021-08-27 | Bag-type dust collector back-blowing control method suitable for dry quenching environment dust removal system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110996955.7A CN113680159A (en) | 2021-08-27 | 2021-08-27 | Bag-type dust collector back-blowing control method suitable for dry quenching environment dust removal system |
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| CN202110996955.7A Pending CN113680159A (en) | 2021-08-27 | 2021-08-27 | Bag-type dust collector back-blowing control method suitable for dry quenching environment dust removal system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114618297A (en) * | 2022-04-15 | 2022-06-14 | 深圳市凯盛科技工程有限公司 | Manufacturing method, device and system of flue gas treatment device |
| CN115531989A (en) * | 2022-09-02 | 2022-12-30 | 安徽盛博冶金环保科技有限公司 | Constant-speed isobaric blowing ultralow-emission dust remover and dust removing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114618297A (en) * | 2022-04-15 | 2022-06-14 | 深圳市凯盛科技工程有限公司 | Manufacturing method, device and system of flue gas treatment device |
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| CN115531989A (en) * | 2022-09-02 | 2022-12-30 | 安徽盛博冶金环保科技有限公司 | Constant-speed isobaric blowing ultralow-emission dust remover and dust removing method |
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Application publication date: 20211123 |