CN116651094A - Dust removing and blowing method and related device for filter bag of dust remover - Google Patents
Dust removing and blowing method and related device for filter bag of dust remover Download PDFInfo
- Publication number
- CN116651094A CN116651094A CN202310638632.XA CN202310638632A CN116651094A CN 116651094 A CN116651094 A CN 116651094A CN 202310638632 A CN202310638632 A CN 202310638632A CN 116651094 A CN116651094 A CN 116651094A
- Authority
- CN
- China
- Prior art keywords
- blowing
- dust
- injection
- filter bag
- group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000428 dust Substances 0.000 title claims abstract description 319
- 238000007664 blowing Methods 0.000 title claims abstract description 239
- 238000000034 method Methods 0.000 title claims abstract description 75
- 238000002347 injection Methods 0.000 claims abstract description 250
- 239000007924 injection Substances 0.000 claims abstract description 250
- 238000004140 cleaning Methods 0.000 claims abstract description 66
- 238000001514 detection method Methods 0.000 claims description 59
- 230000000875 corresponding effect Effects 0.000 claims description 29
- 238000012360 testing method Methods 0.000 claims description 24
- 238000005507 spraying Methods 0.000 claims description 16
- 238000003860 storage Methods 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000002596 correlated effect Effects 0.000 claims description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 239000004071 soot Substances 0.000 description 16
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000001914 filtration Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Abstract
The application discloses a dust-cleaning blowing method and a related device for a filter bag of a dust remover, which can be used in the dust removing field; then, determining the inter-group blowing interval duration from the end time of the ash removal blowing flow of the previous group when the pressure difference between an inlet and an outlet is equal to the current preset pressure drop; the group of ash cleaning blowing flows comprises ash cleaning blowing flows with a plurality of rounds; then, determining a blowing mode based on inter-group blowing interval duration and a preset mode determining rule; the blowing mode comprises constant pressure blowing and timing blowing; and finally, based on the blowing mode and a preset blowing rule, executing a group of ash cleaning blowing flow on the filter bag of the dust remover. Therefore, the injection mode is determined based on the inter-group injection interval time length, constant pressure injection and timing injection can be combined, dust attached to the surface of the filter bag can be timely and effectively removed, and the service life of the filter bag is prolonged.
Description
Technical Field
The application relates to the technical field of dust removal, in particular to a dust removal blowing method and a related device for a filter bag of a dust remover.
Background
With the vigorous development of industries such as coal-fired power generation, cement production and metal processing, a great deal of dust pollution generated in the production process is also becoming more important.
Currently, dust collectors are arranged at dust discharge ports and the like to be an important way for controlling dust pollution, wherein the bag type dust collectors and the electric bag type combined dust collectors are widely applied due to the characteristics of small occupied area, high dust collection efficiency and the like. However, since dust adhering to the surface of the filter bag is difficult to be effectively removed, dust is accumulated on the surface of the filter bag for a long time, which may cause problems of corrosion, abrasion, high filtration resistance, and the like of the filter bag, and the breakage of the filter bag is accelerated, so that the replacement frequency and the required cost of the filter bag are high, and the cost required for using the dust remover is high.
Therefore, how to effectively remove dust attached to the surface of the filter bag and prolong the service life of the filter bag becomes a current urgent problem to be solved.
Disclosure of Invention
Based on the problems, the application provides a dust removing and blowing method and a related device for a filter bag of a dust remover, which can effectively remove dust attached to the surface of the filter bag and prolong the service life of the filter bag.
The embodiment of the application discloses the following technical scheme:
In a first aspect, the application provides a dust cleaning and blowing method for a filter bag of a dust collector, which comprises the following steps:
acquiring the inlet-outlet pressure difference of a filter bag area of the dust remover; an air inlet pipe penetrating through the filter bag area is arranged in the dust remover, one end of the air inlet pipe is a dust inlet, and the other end of the air inlet pipe is a dust outlet; the pressure difference between the inlet and the outlet is the difference between the air pressure of the dust inlet and the air pressure of the dust outlet;
determining the inter-group blowing interval duration between the moment when the pressure difference between the inlet and the outlet is equal to the current preset pressure drop and the moment when the ash removal blowing process ends in the previous group; the group of ash removal blowing flows comprises ash removal blowing flows of a plurality of rounds;
determining a blowing mode based on the inter-group blowing interval duration and a preset mode determining rule; the spraying mode comprises constant-pressure spraying and timing spraying;
and executing a group of ash cleaning blowing processes on the filter bag of the dust remover based on the blowing mode and a preset blowing rule.
Optionally, the determining the blowing mode based on the inter-group blowing interval duration and a preset mode determining rule includes:
if the inter-group injection interval time length is greater than or equal to a preset first time length, determining that the injection mode is timing injection;
And if the inter-group blowing interval duration is smaller than the preset first duration, determining that the blowing mode is constant-pressure blowing.
Optionally, the blowing mode of the constant pressure blowing includes a plurality of preset pressure drops; after the inter-group injection interval duration from the moment when the inlet-outlet pressure difference is equal to the current preset pressure drop to the moment when the ash removal injection flow of the previous group ends is determined, the method further comprises:
if the inter-group blowing interval duration is smaller than a preset second duration, the current preset pressure drop is improved;
and re-determining the inter-group injection interval duration based on the increased current preset pressure drop.
Optionally, the performing a set of the ash cleaning blowing process on the filter bag of the dust collector based on the blowing mode and a preset blowing rule includes:
determining the staggered injection sequence of each injection valve based on the distance between the injection valves and the dust inlet in the filter bag area of the dust remover; the plurality of injection valves are arranged on two sides of the air inlet pipe in a one-to-one correspondence manner in position, and the two injection valves in the one-to-one correspondence manner are a pair of injection valves;
determining an opening time interval between the injection valves adjacent to the opening sequence based on the dust component detection information of the dust inlet and the staggered injection sequence; the opening time interval is the time interval between the closing time of the previous injection valve and the opening time of the next injection valve;
And executing a group of ash cleaning blowing processes on the filter bag of the dust remover based on the blowing mode, the staggered blowing sequence of each blowing valve and the opening time interval.
Optionally, the determining, based on the dust component detection information of the dust inlet and the dislocated injection sequence, an opening time interval between injection valves adjacent to an opening sequence includes:
acquiring optimal compensation time length corresponding to dust component detection information based on the dust component detection information of the dust inlet of the dust remover;
obtaining a position coefficient of the injection valve to be opened based on the staggered injection sequence; the position coefficient of the injection valve is positively correlated with the distance from the injection valve to the dust inlet;
and calculating the product of the position coefficient of the injection valve to be opened and the optimal compensation time length, and taking the sum of the product and the preset basic time length as the opening time interval between the injection valves adjacent to the opening sequence.
Optionally, before the obtaining the optimal compensation duration corresponding to the dust component detection information based on the dust component detection information of the dust inlet of the dust collector filter bag, the method further includes:
acquiring first dust component detection information of a dust inlet of the dust remover; the dust remover does not store past dust component detection information, the similarity of which with the first dust component detection information is within a preset similarity threshold value;
Selecting a plurality of test compensation time lengths within a preset time length range;
respectively executing at least one round of ash cleaning and blowing processes based on a plurality of test compensation time lengths to obtain a plurality of inlet-outlet pressure differences;
and taking the test compensation time length corresponding to the minimum value in the inlet and outlet pressure differences as an optimal compensation time length, and establishing a corresponding relation between the optimal compensation time length and the first dust component detection information.
Optionally, the blowing mode is constant pressure blowing, and the blowing mode of constant pressure blowing comprises a plurality of preset pressure drops; the group of injection valves comprises a plurality of pairs of adjacent injection valves or a pair of injection valves; the determining of the staggered injection sequence of each injection valve based on the distance between the injection valves and the dust inlet in the filter bag area of the dust collector comprises the following steps:
judging whether the current preset pressure drop is the maximum value of a plurality of preset pressure drops corresponding to a plurality of pressure drop gears, if so, determining a first dislocation blowing sequence of each blowing valve based on the distance between a plurality of blowing valves in a filter bag area of the dust collector and the dust inlet; the type of the first staggered blowing sequence is a multi-blowing type in which a group of blowing valves are opened at the same time;
if not, determining a second staggered injection sequence of each injection valve based on the distances between the injection valves and the dust inlet in the filter bag area of the dust remover; the second staggered injection sequence is of a single injection type in which one injection valve is opened at the same time.
In a second aspect, the present application provides an ash removal blowing device for a filter bag of a dust collector, the device comprising: the device comprises an acquisition module, an inter-group blowing interval duration determination module, a blowing mode determination module and an ash removal module;
the acquisition module is used for acquiring the inlet-outlet pressure difference of the filter bag area of the dust remover; an air inlet pipe penetrating through the filter bag area is arranged in the dust remover, one end of the air inlet pipe is a dust inlet, and the other end of the air inlet pipe is a dust outlet; the pressure difference between the inlet and the outlet is the difference between the air pressure of the dust inlet and the air pressure of the dust outlet;
the inter-group injection interval duration determining module is used for determining the inter-group injection interval duration from the moment when the pressure difference between the inlet and the outlet is equal to the current preset pressure drop to the moment when the ash removal injection flow of the previous group is finished; the group of ash removal blowing flows comprises ash removal blowing flows of a plurality of rounds;
the blowing mode determining module is used for determining a blowing mode based on the inter-group blowing interval duration and a preset mode determining rule; the spraying mode comprises constant-pressure spraying and timing spraying;
the ash removal module is used for executing a group of ash removal blowing processes on the filter bag of the dust remover based on the blowing mode and a preset blowing rule.
In a third aspect, the application provides a dust remover, which comprises the ash removal blowing device of the dust remover filter bag in the second aspect.
In a fourth aspect, the present application provides a computer readable storage medium having stored therein computer instructions which, when run on a dust collector, perform the steps of the dust cleaning injection method of the dust collector filter bag of any one of the first aspects above.
Compared with the prior art, the application has the following beneficial effects:
the application provides a dust-cleaning and blowing method of a filter bag of a dust remover, which comprises the steps of firstly, obtaining inlet and outlet pressure differences of a filter bag area of the dust remover; then, determining the inter-group blowing interval duration between the moment when the inlet-outlet pressure difference is equal to the current preset pressure drop and the moment when the ash removal blowing process ends in the previous group; the group of ash cleaning blowing flows comprises ash cleaning blowing flows with a plurality of rounds; then, determining a blowing mode based on inter-group blowing interval duration and a preset mode determining rule; and finally, based on the blowing mode and a preset blowing rule, executing a group of ash cleaning blowing flow on the filter bag of the dust remover. Therefore, the injection mode is determined based on the inter-group injection interval time length, constant pressure injection and timing injection can be combined, and the problems that dust is accumulated for a long time to corrode a filter bag or the dust is hardened on the surface of the filter bag to influence the ash cleaning effect and the like when the inter-group injection interval time length between two groups of ash cleaning injection flows is too long due to the fact that only constant pressure injection is adopted are avoided; and when the filter resistance possibly caused by the regular blowing rises fast, the pressure difference between the inlet and the outlet is too large, so that the dust trapping capacity is reduced, and the like, so that the dust attached to the surface of the filter bag can be timely and effectively removed, and the service life of the filter bag is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the application, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a flow chart of a dust removal blowing method of a filter bag of a dust collector provided by an embodiment of the application;
FIG. 2 is a block diagram of a composite electrostatic precipitator provided in an embodiment of the present application;
FIG. 3 is a schematic diagram of a rule for determining a pattern according to an embodiment of the present application;
FIG. 4 is a block diagram of another electrostatic fabric filter according to an embodiment of the present application;
FIG. 5 is a flowchart of a method for determining an opening time interval between adjacent blowing valves in an opening sequence in a dust collector according to an embodiment of the present application;
fig. 6 is a schematic diagram of an ash removal blowing device for a filter bag of a dust collector according to an embodiment of the present application.
Detailed Description
The ash removal and blowing method and the relevant device for the filter bag of the dust remover can be used in the dust removal field. The foregoing is merely exemplary, and the application fields of the ash cleaning and blowing method and the related devices of the filter bag of the dust collector provided by the application are not limited.
The terms "first," "second," "third," and "fourth" and the like in the description and in the claims and drawings are used for distinguishing between different objects and not for limiting a particular order.
In embodiments of the application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "by way of example" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "by way of example" or "such as" is intended to present related concepts in a concrete fashion.
The terminology used in the description of the embodiments of the application herein is for the purpose of describing particular embodiments of the application only and is not intended to be limiting of the application.
In order to make the present application better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1, the flow chart of a dust cleaning and blowing method for a filter bag of a dust collector provided by an embodiment of the application includes:
s101: and obtaining the inlet-outlet pressure difference of the filter bag area of the dust collector.
Specifically, a plurality of filter bags are arranged in the dust remover, and the area where the filter bags are positioned is a filter bag area; an air inlet pipe penetrating through the filter bag area can be arranged in the dust remover, and one end of the air inlet pipe is a dust inlet for enabling gas to be dedusted to enter the dust remover; the other end is a dust outlet for discharging the dedusted gas out of the deduster; the pressure difference between the inlet and the outlet is the difference between the air pressure of the dust inlet and the air pressure of the dust outlet.
Referring to fig. 2, the structure of a bag filter according to an embodiment of the present application is shown, where the filter includes: an electric zone 201, a filter bag zone 202, a filter bag zone inlet detection means 203 and a filter bag zone outlet detection means 204. The electric area 201, the filter bag area inlet detection device 203, the filter bag area 202 and the filter bag area outlet detection device 204 are sequentially connected, and the filter bag area inlet detection device 203 is positioned at one side of a dust inlet and is used for detecting the dust condition at the front part of a filter bag, and can comprise the detection of dust concentration at the inlet of the filter bag, dust particle size distribution, dust adhesion, filter bag inlet pressure and the like; the filter bag area outlet detection device 204 is located at one side of the dust outlet and is used for detecting the dust condition at the rear part of the filter bag, and can include detecting the dust particle size distribution at the outlet of the filter bag, the pressure of the outlet of the filter bag, the concentration of the outlet dust and the like. The inlet-outlet pressure difference can be the detected difference between the outlet pressure of the filter bag and the inlet pressure of the filter bag, the inlet-outlet pressure difference is mainly influenced by the filtering resistance of the filter bag, and the larger the filtering resistance is, the larger the inlet-outlet pressure difference is.
S102: and determining the inter-group blowing interval duration between the moment when the inlet and outlet pressure difference is equal to the current preset pressure drop and the moment when the ash cleaning blowing flow of the previous group is ended.
As an example, a set of soot cleaning blowing flows includes a plurality of rounds of soot cleaning blowing flows, and a specific round may be set based on actual requirements, for example, a set of soot cleaning blowing flows may be preset to include 100 rounds of soot cleaning blowing flows.
For example, the timing may be started at the time when a set of soot cleaning blowing process ends, and it is easy to understand that after the soot cleaning blowing process is performed, the inlet-outlet pressure difference of the dust remover will decrease, and the timing may be stopped when the inlet-outlet pressure difference is again equal to the current preset pressure drop, so as to determine the inter-group blowing interval duration from the end time of the previous set of soot cleaning blowing process.
S103: and determining the blowing mode based on the inter-group blowing interval duration and a preset mode determining rule.
For example, the same blowing mode may be used for all the soot cleaning flows in a group of soot cleaning flows, and the blowing mode may be redetermined based on the inter-group blowing interval duration for each performed group of soot cleaning flows. The blowing mode can comprise timing blowing and constant pressure blowing, wherein the timing blowing is to execute a group of ash cleaning blowing flows at fixed time intervals; the constant-pressure blowing is to execute a group of ash cleaning blowing flows when the inlet-outlet pressure difference reaches the preset pressure drop. The first time period may be preset, for example, the first time period may be 1 hour. When the inter-group injection interval time length is greater than or equal to a preset first time length, determining that the injection mode is timing injection; and when the inter-group blowing interval duration is smaller than the preset first duration, determining that the blowing mode is constant-pressure blowing.
Referring to fig. 3, a schematic diagram of a mode determining rule provided by an embodiment of the present application is shown, in which the constant pressure injection includes a plurality of pressure drop stages, and each pressure drop stage corresponds to a different preset pressure drop, for example, five pressure drop stages may be included, and the preset pressure drops corresponding to the five pressure drop stages are respectively 800Pa, 1000Pa, 1200Pa, 1500Pa and 2000Pa. The foregoing is merely exemplary, and it is easy to understand that the number of pressure drop stages and the preset pressure drop corresponding to each pressure drop stage may be set according to actual requirements.
Optionally, when the dust remover is started, the first group of ash cleaning and blowing processes are performed, the blowing mode can be preset to be constant pressure blowing, and at least one round of ash cleaning and blowing processes are performed when the pressure difference between the inlet and the outlet is equal to or greater than the current preset pressure drop. For example, 800Pa can be used as an initial current preset pressure drop, at least one round of ash cleaning and blowing processes are executed when the inlet-outlet pressure difference reaches 800Pa, and timing of inter-group blowing interval duration is started after execution is finished.
As an example, when the inlet-outlet pressure difference is equal to the current preset pressure drop of 800Pa again, stopping timing the inter-group injection interval duration, and obtaining the inter-group injection interval duration. If the inter-group injection interval time is longer than or equal to a preset first time, for example, longer than or equal to one hour, the inlet-outlet pressure difference is indicated to be slow to increase, or the inlet-outlet pressure difference can be reduced to a lower level after a group of ash removal injection flows are executed, in order to avoid that dust corrodes the filter bag or is hardened due to long-term accumulation on the surface of the filter bag, the ash removal effect is influenced, the injection mode can be determined to be a timing injection mode, for example, a group of ash removal injection flows are executed every 30 minutes; if the inter-group blowing interval duration is smaller than the preset first duration, it indicates that the dust in the flue gas is more so that the inlet-outlet pressure difference increases faster, or the inlet-outlet pressure difference is still higher after a group of ash cleaning blowing processes are performed, at this time, the blowing mode may be determined to be constant pressure blowing, for example, when the inlet-outlet pressure difference reaches 800Pa again, a group of ash cleaning blowing processes are performed.
Optionally, in the timing blowing mode, if the inter-group blowing interval duration is less than a preset timing duration, for example, less than 30 minutes, the blowing mode may be switched from the timing blowing to the constant pressure blowing; and when the inter-group spraying interval duration is smaller than the preset first duration in the timing spraying mode, the spraying mode is switched to the constant-pressure spraying mode.
Optionally, if the inter-group blowing interval duration is less than the preset second duration, the current preset pressure drop may be increased; and then, redetermining the inter-group injection interval duration based on the increased current preset pressure drop. The second duration may be, for example, 15 seconds, when the inter-group blowing interval duration is less than the preset second duration, which indicates that the soot cleaning blowing process performed at this time cannot effectively reduce the inlet-outlet pressure difference, at this time, the pressure drop gear may be changed to improve the current preset pressure drop, for example, the current preset pressure drop may be improved from 800Pa to 1000Pa, the time when the inlet-outlet pressure difference is equal to 1000Pa is equal to the current preset pressure drop, and the duration of the previous group of soot cleaning blowing process end time is counted, so as to obtain a new inter-group blowing interval duration and perform a new group of soot cleaning blowing process, so that the blowing frequency between the soot cleaning blowing processes of a plurality of rounds is moderate in the process of performing the group of soot cleaning blowing process in the constant pressure blowing mode, and the service life of the filter bag of the dust remover is prolonged.
Therefore, when the inlet-outlet pressure difference is slowly increased or the inlet-outlet pressure difference can be reduced to a lower level after a group of ash cleaning and blowing processes are executed, a timing ash cleaning and blowing mode is adopted, so that the filter bag of the dust remover is prevented from being corroded for a long time by substances possibly contained in dust and having certain corrosiveness, and the dust is prevented from being accumulated on the surface of the filter bag for a long time, so that the dust hardening influences the filtering resistance of the filter bag; when the pressure difference between the inlet and the outlet is increased faster due to more dust in the flue gas or the pressure difference between the inlet and the outlet is still higher after a group of ash removal and blowing processes are executed, the dust can be timely removed when the filtration resistance of the filter bag is higher, namely more dust attached to the surface of the filter bag is more, so that the constant-pressure blowing and the timing blowing are combined, the damage speed of the filter bag is delayed, the service life of the filter bag is prolonged, and the cost for replacing the filter bag of the dust remover is reduced.
Optionally, if the inlet-outlet pressure difference is greater than a preset first pressure drop and the inter-group blowing interval duration is less than a preset third duration, a filter bag replacement prompt message may be output. For example, the preset first pressure drop may be 2000pa and the preset third inter-group injection interval period may be 15 seconds. Alternatively, the filter bag replacement prompt may include, but is not limited to, a beep alarm or an indicator light alarm, or the like.
Optionally, before outputting the filter bag replacement prompt information, the current preset pressure drop can be increased based on the preset pressure drop change rule, and the ash cleaning and blowing process can be continuously executed in a blowing mode of constant pressure blowing based on the increased current preset pressure drop and the preset blowing rule. For example, when the current preset pressure drop is 2000pa, the current preset pressure drop may be increased to 2100pa based on a preset pressure drop change rule so that the dust collector may continue to operate, where the preset pressure drop change rule may include a judgment condition and a corresponding pressure drop increase step, for example, the pressure drop increase step is 100pa when the above judgment condition that the inlet-outlet pressure difference is greater than the preset first pressure drop and the inter-group injection interval duration is less than the preset third duration is met.
S104: and executing a group of ash cleaning blowing processes on the filter bag of the dust remover based on the blowing mode and a preset blowing rule.
Illustratively, the filter bag area of the dust collector may include a plurality of filter bag sub-chambers, each filter bag sub-chamber is provided with a plurality of filter bags and a plurality of injection valves, alternatively, the filter bags and the injection valves are arranged in the same number in each filter bag sub-chamber, and the injection valves may be pulse injection valves; the plurality of injection valves are arranged on two sides of the air inlet manifold in a one-to-one correspondence manner, and the two injection valves in the one-to-one correspondence manner are a pair of injection valves; the group of injection valves comprises a plurality of pairs of adjacent injection valves or a pair of injection valves; the filter bag chambers can be arranged in a double-row mode, namely all the filter bag chambers are divided into two rows, and the filter bag chambers are arranged on two sides of an air inlet main pipe of the dust remover in a one-to-one correspondence mode.
In the embodiment of the application, the injection sequence of each injection valve and the opening time interval between the injection valves adjacent to the opening sequence can be determined based on the preset injection rule. Specifically, the staggered injection sequence of each injection valve can be determined based on the distances between the injection valves and the dust inlet in the filter bag area of the dust collector; determining the opening time interval between the injection valves adjacent to the opening sequence based on dust component detection information of the dust inlet and the staggered injection sequence; and executing a group of ash cleaning and blowing processes based on the blowing mode, the staggered blowing sequence of each blowing valve and the opening time interval. The opening time interval is the time interval between the closing time of the previous injection valve and the opening time of the next injection valve.
Optionally, determining the staggered injection sequence of each injection valve based on the distances between the multiple injection valves and the dust inlet in the dust collector may include: firstly, determining the injection sequence of a plurality of filter bag sub-chambers based on the distance between the filter bag sub-chambers and a dust inlet in a dust remover, specifically, enabling the injection sequence of the filter bag sub-chambers from first to second and the distance between the filter bag sub-chambers and the dust inlet to be corresponding from near to far, particularly, if the filter bag sub-chambers are arranged in a double row mode and two filter bag sub-chambers corresponding to each other in position are not opened at the same time, sequentially opening the injection valves to be opened of all filter bag sub-chambers positioned on the same side of an air inlet main pipe of the dust remover, and sequentially opening the injection valves to be opened of all filter bag sub-chambers on the other side; then, the staggered injection sequence of each injection valve can be determined based on the distance between each injection valve and the dust inlet, the corresponding relation between the injection valve and the filter bag sub-chambers and the injection sequence of the filter bag sub-chambers, and specifically, in one filter bag sub-chamber, the injection valves arranged in the filter bag sub-chambers can be opened according to the sequence from the near to the far distance between the injection valve and the dust inlet; for the filter bag sub-chambers, the closest injection valve to the dust inlet in the injection valves in the closed state of each filter bag sub-chamber can be used as the injection valve to be opened, the injection valves to be opened of each filter bag sub-chamber are sequentially opened according to the injection sequence of the filter bag sub-chambers, then the injection valves to be opened of each filter bag sub-chamber are redetermined, the injection valves to be opened of each filter bag sub-chamber are sequentially opened according to the injection sequence of the filter bag sub-chambers, and the circulation is performed as the staggered injection sequence of each injection valve.
Specifically, referring to fig. 4, the structure diagram of another electric bag composite dust collector provided by the embodiment of the application is shown, in the electric bag composite dust collector, the dust collector is configured with four filter bag sub-chambers, the four filter bag sub-chambers are in one-to-one correspondence in position and are arranged on two sides of an air inlet main pipe of the dust collector in two rows, each filter bag sub-chamber is configured with twenty injection valves, and for convenience of description, the filter bag sub-chambers on one side of the air inlet main pipe of the dust collector are distributed with the numbers of 'sub-chamber one' and 'sub-chamber two' from small to large according to the sequence of the filter bag sub-chambers from the dust inlet from near to far, and the filter bag sub-chambers on the other side are distributed with the numbers of 'sub-chamber three' and 'sub-chamber four' from small to large; in combination with the distance between the jetting valves and the dust inlet, twenty jetting valves arranged in the first sub-chamber can be numbered as '1, 2, 3, … … and 20' in sequence from the near to the far from the dust inlet, and in the same way, twenty jetting valves arranged in the second sub-chamber can be numbered as '21, 22, 23, … … and 40', twenty jetting valves arranged in the third sub-chamber can be numbered as '1', 2', 3', … … and 20'", and twenty jetting valves arranged in the fourth sub-chamber can be numbered as' 21', 22', 23', … … and 40'"; the numerical value of the number of the injection valve is positively correlated with the distance from the injection valve to the dust inlet, and can be used as the position coefficient of the injection valve. Therefore, when one of the injection valves in the closed state, which is configured in each filter bag sub-chamber, is used as the injection valve to be opened, and when a plurality of filter bag sub-chambers are in a double-row arrangement mode, and two filter bag sub-chambers corresponding to each other in position are not opened at the same time, namely, only one injection valve is opened at the same time, the staggered injection sequence can be expressed as '1- & gt 21- & gt, 1' & gt 21 '& gt 2- & gt 22- & gt 2' & gt 22 '& gt 3- & gt 23' & gt 4- & gt 24- & gt 4 '& gt 24' & gt … … - & gt 20- & gt40- & gt20 '& gt40' < when the filter bag chambers are arranged in a double row mode and the filter bag chambers corresponding to each other in two positions are opened at the same time, that is, a group of injection valves are opened at the same time, the staggered injection sequence can be expressed as ' 1, 1' →21, 21' →2, 2' →22, 22' →3, 3' →23, 23' →4, 4' →24, 24' → … … →20, 20' →40, 40' "; as an example, if two pairs of adjacent injection valves are included in a group of injection valves, the above-described staggered injection sequence may be expressed as "1, 1', 2' →21, 21', 22' →3, 3', 4' →23, 23', 24' → … … →39, 39', 40'".
Therefore, the jet valves are opened sequentially based on staggered jet, so that the air flow generated by opening the jet valves is more uniform, secondary dust emission after ash removal of the adjacent filter bags caused by sequential opening of the jet valves with two groups of adjacent positions is avoided, the jet air flow disorder can be avoided, and the ash removal effect on the filter bags of the dust collectors is improved.
Optionally, whether the current preset pressure drop is the maximum value of a plurality of preset pressure drops corresponding to a plurality of pressure drop gears or not can be judged, if so, the first dislocation injection sequence of each injection valve is determined based on the distances between a plurality of injection valves in the filter bag area of the dust remover and the dust inlet; if not, determining a second staggered injection sequence of each injection valve based on the distances between the injection valves and the dust inlets in the filter bag area of the dust collector. The first staggered injection sequence is of a multi-injection type in which a group of injection valves are opened at the same time; the second staggered injection sequence is of a single injection type in which one injection valve is opened at the same time. Therefore, when the pressure difference between the inlet and the outlet cannot be effectively reduced, the plurality of injection valves can be opened at the same time in the process of executing the ash cleaning injection flow, and the ash cleaning effect is improved. It will be appreciated that the multi-jet type requires a greater amount of gas storage than the single jet type, and that a spare gas reservoir may be preset for multi-jet or may be added before the soot cleaning jet flow is performed in a staggered jet sequence of the multi-jet type.
Optionally, after each injection valve executes the ash removal injection flow of the preset round according to the staggered injection sequence, the poppet valve of the filter bag sub-chamber can be closed, so that the filter bag sub-chamber does not perform dust filtration any more, and off-line ash removal is performed. Therefore, the dust which is loose and is not easy to form cake blocks can be settled into the ash bucket, and the purpose of reducing the pressure difference between an inlet and an outlet is achieved.
In summary, in the embodiment of the present application, the injection mode is determined based on the inter-group injection interval duration between the inlet and outlet pressure differences equal to the current preset pressure drop time and the end time of the previous group of ash removal injection flow, so that the fixed pressure injection and the timing injection can be combined, and the problems that long-term dust accumulation corrodes the filter bag or dust hardening on the surface of the filter bag affects the ash removal effect when the inter-group injection interval duration between two groups of ash removal injection flows is too long due to only adopting the fixed pressure injection are avoided; and when the filter resistance possibly caused by the regular blowing rises fast, the pressure difference between the inlet and the outlet is too large, so that the dust trapping capacity is reduced, and the like, so that the dust attached to the surface of the filter bag can be timely and effectively removed, and the service life of the filter bag is prolonged.
Referring to fig. 5, the flowchart of a method for determining an opening time interval between adjacent blowing valves in an opening sequence in a dust remover according to an embodiment of the present application, in the method, a round of dust cleaning and blowing process is performed on a filter bag of the dust remover based on a staggered blowing sequence of each blowing valve, and the method may include the following steps:
S501: acquiring dust component detection information of a dust inlet of the dust remover, judging whether the dust remover stores past dust component detection information with the similarity of the dust component detection information within a preset similarity threshold value, and if not, executing the step S502; if yes, the step of S505 is performed.
As an example, dust component detection information such as inlet dust concentration, dust particle size distribution, dust adhesiveness, and the like can be obtained by detecting the dust component at the dust inlet by the filter bag section inlet detection device 203 shown in fig. 2, for example. The dust remover may comprise a control system, e.g. PLC (Programmable Logic Controller), for recording detected dust component detection information; the dust remover may further identify whether the currently detected dust component detection information is the first dust component detection information, if so, execute the step described in S502, and if not, execute the step described in S505. If the dust remover does not store the past dust component detection information with the similarity with the currently detected dust component detection information within a preset similarity threshold value, the currently detected dust component detection information is the first dust component detection information.
S502: and selecting a plurality of test compensation time lengths within a preset time length range.
As an example, 10 test compensation durations t may be selected within a preset duration range of, for example, 0.05 seconds to 1 second 1 ' for example, the 10 test compensation durations may be respectively: 0.06 seconds, 0.08 seconds, 0.1 seconds, 0.15 seconds, 0.2 seconds, 0.25 seconds, 0.3 seconds, 0.35 seconds, 0.4 seconds, and 0.45 seconds. The foregoing is merely an example, and the preset duration range and the specific value of the test compensation duration in the embodiment of the present application are not limited.
S503: and respectively executing at least one round of ash cleaning and blowing processes based on the plurality of test compensation time periods to obtain a plurality of inlet and outlet pressure differences.
Specifically, the compensation time period t is compensated for a plurality of tests 1 And', executing at least one round of ash cleaning and blowing processes based on any one of the test compensation time periods to obtain the inlet-outlet pressure difference after the execution of each round of ash cleaning and blowing processes is finished. For example, 10 test compensation periods t are preset 1 ' 10 inlet/outlet pressure differences P1, P2, … …, P10 can be obtained.
Optionally, before at least one round of ash removal jetting flow is executed based on the plurality of test compensation time periods, dust component detection information of a dust inlet of the dust remover can be obtained based on the plurality of test compensation time periods respectively, so as to avoid that the finally obtained optimal compensation time period is not an optimal value in the plurality of test compensation time periods due to dust component change in the process of executing the ash removal jetting flow based on different test compensation time periods; and the dust component detection information of the dust inlet of the dust remover can be obtained only once before at least one round of dust removal blowing flow is respectively executed based on a plurality of test compensation time durations, so that the operation amount of the running program in the dust remover is reduced, and the operation speed is improved.
S504: and taking the test compensation time length corresponding to the minimum value in the inlet and outlet pressure differences as the optimal compensation time length, and establishing a corresponding relation between the optimal compensation time length and dust component detection information.
Specifically, the inlet and outlet pressure differences after the execution of each round of ash removal blowing process can be compared, the smaller the inlet and outlet pressure differences are, namely the smaller the difference between the dust outlet pressure and the dust inlet pressure is, the better the ash removal effect can be indicated, and the test compensation time length corresponding to the minimum value in the inlet and outlet pressure differences can be taken as the optimal compensation time length t 1 。
S505: based on dust component detection information of a dust inlet of the dust remover, acquiring optimal compensation time length t corresponding to the dust component detection information 1 。
For example, the optimal compensation period t may be preset or determined by steps such as those described in S502-S504 1 The method comprises the steps that the dust component detection information is correspondingly recorded to a control system, the current dust component detection information can be detected before a new round of ash removal blowing flow begins, then whether recorded dust component detection information with the similarity larger than a preset threshold value exists in one or more pieces of dust component detection information recorded by a PLC control system or not can be judged, if yes, a compensation interval corresponding to the recorded dust component detection information can be used as a compensation interval of the current round of ash removal blowing flow; if not, the compensation interval can be redetermined by the steps described in S502-S504, and the redetermined compensation interval t 1 And recording the detection information corresponding to the current dust component detection information to a control system.
S506: and obtaining the position coefficient N of the injection valve to be opened based on the staggered injection sequence.
Specifically, the position coefficient N of the injection valve is positively correlated with the distance of the injection valve from the dust inlet. For example, the blowing valve with the shortest distance from the dust inlet may be determined as the 1 st blowing valve, and the blowing valve with the farther distance from the dust inlet among the two adjacent blowing valves is the nth blowing valve where the two adjacent blowing valves are located, where N is the position coefficient of the blowing valve.
The above-described method of determining the position coefficient is only an example, and the position coefficient of the blowing valve may be determined based on, for example, a value of the distance of the blowing valve from the dust inlet in the centimeter scale.
In the embodiment of the application, based on the predetermined staggered injection sequence, which injection valve is currently to be opened can be known, and the position coefficient of the injection valve to be opened is obtained.
S507: calculating the position coefficient N and the optimal compensation time t of the injection valve to be opened 1 Taking the sum of the product and the preset basic time t as the opening time interval between the adjacent injection valves in the opening sequence.
Specifically, the inter-injection interval duration T may be calculated using the following formula: t=t+n×t 1 Wherein t is a preset basic time length, and can be flexibly set based on the air source and the air storage tank filling time, for example, 15 seconds; n is the position coefficient of the injection valve to be opened; t is t 1 For the optimal compensation duration.
Optionally, if the current preset pressure drop is greater than or equal to the preset pressure drop threshold, the preset basic time period t may be shortened, for example, if the preset pressure drop threshold is 1500pa and the current preset pressure drop is 2000pa, the preset basic time period t may be gradually shortened from the original 15 seconds to 10 seconds, for example.
In the embodiment of the application, a plurality of rows of filter bags are arranged in the direction perpendicular to the air inlet manifold of the dust remover, and as the dust captured by the dust remover flows in the direction from the dust inlet to the dust outlet, namely, the dust flows in the direction from the first row of filter bags to the last row of filter bags near the dust inlet, the dust quantity required to be filtered by the first row of filter bags is larger than that required by the second row of filter bags, and the dust quantity required to be filtered by the second row of filter bags is larger than that required by the third row of filter bags. In general, a blowing valve may be configured for one row or several adjacent rows of filter bags in a filter bag sub-chamber, and due to the difference in the amount of dust to be filtered in each row of filter bags, the opening time interval between two adjacent blowing valves in the opening sequence, which are closer to the dust inlet, is shorter, and the starting time interval between two adjacent blowing valves in the opening sequence, which are farther from the dust inlet, is longer, so that the ash cleaning effect may be improved.
Referring to fig. 6, the schematic diagram of an ash cleaning and blowing device for a filter bag of a dust collector according to an embodiment of the present application includes: the device comprises an acquisition module 601, an inter-group injection interval duration determination module 602, an injection mode determination module 603 and an ash removal module 604.
An acquisition module 601, configured to acquire an inlet-outlet pressure difference of a filter bag area of the dust collector; an air inlet pipe penetrating through the filter bag area is arranged in the dust remover, one end of the air inlet pipe is a dust inlet, and the other end of the air inlet pipe is a dust outlet; the pressure difference between the inlet and the outlet is the difference between the air pressure of the dust inlet and the air pressure of the dust outlet.
An inter-group injection interval duration determining module 602, configured to determine an inter-group injection interval duration from a time point when the pressure difference between the inlet and the outlet is equal to the current preset pressure drop to a time point when the ash removal injection process of the previous group ends; the group of ash cleaning blowing flows comprises ash cleaning blowing flows with a plurality of rounds.
The injection mode determining module 603 is configured to determine an injection mode based on the inter-group injection interval duration and a preset mode determining rule; the blowing mode includes constant pressure blowing and timing blowing.
The ash removal module 604 is configured to perform a set of ash removal blowing process on the filter bag of the dust collector based on the blowing mode and a preset blowing rule.
Optionally, in the ash cleaning and blowing device for a filter bag of a dust collector provided in the embodiment of the present application, the blowing mode determining module 603 may include a first judging unit and a determining unit. The first judging unit is used for judging whether the inter-group interval duration is smaller than a preset first duration; if yes, the determining unit determines the blowing mode as constant-pressure blowing; if not, the determination unit determines the injection mode as the timing injection.
Optionally, the blowing mode of constant pressure blowing in the embodiment of the present application includes a plurality of preset pressure drops, and the ash cleaning blowing device of the filter bag of the dust collector provided in the embodiment of the present application further includes a second judging module. The second judging module is used for judging whether the time length passed when the pressure difference of the inlet and the outlet is equal to the current preset pressure drop is smaller than a preset second time length, if yes, changing the pressure drop gear to improve the current preset pressure drop, and re-determining the inter-group blowing interval time length based on the improved current preset pressure drop; if not, executing the subsequent steps based on the current inter-group injection interval duration.
Optionally, in the dust removing and blowing device for a filter bag of a dust collector provided by the embodiment of the application, the dust removing module 604 includes a blowing sequence determining unit 01, an opening time interval determining unit 02, and a dust removing unit 03. The dust remover provided by the embodiment of the application comprises a plurality of injection valves which are arranged on two sides of an air inlet pipe in a one-to-one correspondence manner, wherein two injection valves which are in one-to-one correspondence are a pair of injection valves, and an injection sequence determining unit 01 is used for determining the dislocation injection sequence of each injection valve based on the distances between the plurality of injection valves and a dust inlet in a filter bag area of the dust remover; the opening time interval determining unit 02 is used for determining the opening time interval between the injection valves adjacent to the opening sequence based on the dust component detection information of the dust inlet and the staggered injection sequence; the opening time interval is the time interval between the closing time of the previous injection valve and the opening time of the next injection valve; the ash removing unit 03 is used for executing a group of ash removing and blowing processes on the filter bag of the dust remover based on the blowing mode, the staggered blowing sequence of each blowing valve and the opening time interval.
Alternatively, the on-time interval determining unit 02 is specifically configured to: acquiring optimal compensation time length corresponding to dust component detection information based on the dust component detection information of a dust inlet of the dust remover; obtaining a position coefficient of a to-be-opened injection valve based on the staggered injection sequence; the position coefficient of the injection valve is positively correlated with the distance from the injection valve to the dust inlet; and calculating the product of the position coefficient of the injection valve to be opened and the optimal compensation time length, and taking the sum of the product and the preset basic time length as the opening time interval between the injection valves adjacent to the opening sequence.
Alternatively, the on-time interval determination unit 02 may be further configured to: acquiring first dust component detection information of a dust inlet of the dust remover; the dust remover does not store past dust component detection information with the similarity with the first dust component detection information within a preset similarity threshold value; selecting a plurality of test compensation time lengths within a preset time length range; respectively executing at least one round of ash cleaning and blowing processes based on a plurality of test compensation time periods to obtain a plurality of inlet-outlet pressure differences; and taking the test compensation time length corresponding to the minimum value in the inlet and outlet pressure differences as the optimal compensation time length, and establishing a corresponding relation between the optimal compensation time length and the first dust component detection information.
Optionally, the group of injection valves includes adjacent pairs of injection valves or a pair of injection valves, and the injection sequence determining unit 01 is specifically configured to: judging whether the current preset pressure drop is the maximum value of a plurality of preset pressure drops corresponding to a plurality of pressure drop gears, if so, determining a first dislocation injection sequence of each injection valve based on the distance between a plurality of injection valves in a filter bag area of the dust remover and a dust inlet; the type of the first staggered injection sequence is a multi-injection type in which a group of injection valves are opened at the same time; if not, determining a second staggered injection sequence of each injection valve based on the distances between the injection valves and the dust inlets in the filter bag area of the dust remover; the second staggered injection sequence is of a single injection type in which one injection valve is opened at the same time.
The application also provides a dust remover, which comprises the dust removing and blowing device of the dust remover filter bag.
The application also provides a computer readable storage medium, wherein the computer readable storage medium stores computer instructions, and when the computer instructions run on the dust remover, the dust remover executes the steps of the dust removing and blowing method of the dust remover filter bag.
It should be noted that, in the present specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment is mainly described in a different point from other embodiments. In particular, for the apparatus and storage medium embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and references to the details of the method embodiments are only required. The apparatus and storage medium embodiments described above are merely illustrative, in which elements illustrated as separate elements may or may not be physically separate, and elements illustrated as elements may or may not be physical elements, may be located in one place, or may be distributed over multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present application without undue burden.
The foregoing is only one specific embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present application should be included in the scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims (10)
1. The ash cleaning and blowing method for the filter bag of the dust remover is characterized by comprising the following steps of:
acquiring the inlet-outlet pressure difference of a filter bag area of the dust remover; an air inlet pipe penetrating through the filter bag area is arranged in the dust remover, one end of the air inlet pipe is a dust inlet, and the other end of the air inlet pipe is a dust outlet; the pressure difference between the inlet and the outlet is the difference between the air pressure of the dust inlet and the air pressure of the dust outlet;
determining the inter-group blowing interval duration between the moment when the pressure difference between the inlet and the outlet is equal to the current preset pressure drop and the moment when the ash removal blowing process ends in the previous group; the group of ash removal blowing flows comprises ash removal blowing flows of a plurality of rounds;
determining a blowing mode based on the inter-group blowing interval duration and a preset mode determining rule; the spraying mode comprises constant-pressure spraying and timing spraying;
And executing a group of ash cleaning blowing processes on the filter bag of the dust remover based on the blowing mode and a preset blowing rule.
2. The method of claim 1, wherein the determining the blowing mode based on the inter-group blowing interval duration and a preset mode determination rule comprises:
if the inter-group injection interval time length is greater than or equal to a preset first time length, determining that the injection mode is timing injection;
and if the inter-group blowing interval duration is smaller than the preset first duration, determining that the blowing mode is constant-pressure blowing.
3. The method of claim 1, wherein the constant pressure injection mode comprises a plurality of preset pressure drops; after the inter-group injection interval duration from the moment when the inlet-outlet pressure difference is equal to the current preset pressure drop to the moment when the ash removal injection flow of the previous group ends is determined, the method further comprises:
if the inter-group blowing interval duration is smaller than a preset second duration, the current preset pressure drop is improved;
and re-determining the inter-group injection interval duration based on the increased current preset pressure drop.
4. The method of claim 1, wherein the performing a set of the ash removal injection flows on the dust collector filter bag based on the injection pattern and a preset injection rule comprises:
Determining the staggered injection sequence of each injection valve based on the distance between the injection valves and the dust inlet in the filter bag area of the dust remover; the plurality of injection valves are arranged on two sides of the air inlet pipe in a one-to-one correspondence manner in position, and the two injection valves in the one-to-one correspondence manner are a pair of injection valves;
determining an opening time interval between the injection valves adjacent to the opening sequence based on the dust component detection information of the dust inlet and the staggered injection sequence; the opening time interval is the time interval between the closing time of the previous injection valve and the opening time of the next injection valve;
and executing a group of ash cleaning blowing processes on the filter bag of the dust remover based on the blowing mode, the staggered blowing sequence of each blowing valve and the opening time interval.
5. The method according to claim 4, wherein the determining an opening time interval between the injection valves adjacent to the opening order based on the dust component detection information of the dust inlet and the dislocated injection order includes:
based on dust component detection information of a dust inlet of the dust remover, acquiring optimal compensation time length t corresponding to the dust component detection information 1 ；
Obtaining a position coefficient N of the injection valve to be opened based on the staggered injection sequence; the position coefficient N of the injection valve is positively correlated with the distance from the injection valve to the dust inlet;
calculating the position coefficient N of the injection valve to be opened and the optimal compensation time t 1 Taking the sum of the product and a preset basic time T as an opening time interval T between adjacent injection valves in an opening sequence, namely T=t+N×t 1 。
6. The method according to claim 5, wherein before the obtaining the optimal compensation time period corresponding to the dust component detection information based on the dust component detection information of the dust inlet of the dust collector filter bag, the method further comprises:
acquiring first dust component detection information of a dust inlet of the dust remover; the dust remover does not store past dust component detection information, the similarity of which with the first dust component detection information is within a preset similarity threshold value;
selecting a plurality of test compensation time lengths within a preset time length range;
respectively executing at least one round of ash cleaning and blowing processes based on a plurality of test compensation time lengths to obtain a plurality of inlet-outlet pressure differences;
and taking the test compensation time length corresponding to the minimum value in the inlet and outlet pressure differences as an optimal compensation time length, and establishing a corresponding relation between the optimal compensation time length and the first dust component detection information.
7. The method of claim 4, wherein the injection mode is a constant pressure injection, and wherein the injection mode of the constant pressure injection comprises a plurality of preset pressure drops; the group of injection valves comprises a plurality of pairs of adjacent injection valves or a pair of injection valves; the determining of the staggered injection sequence of each injection valve based on the distance between the injection valves and the dust inlet in the filter bag area of the dust collector comprises the following steps:
judging whether the current preset pressure drop is the maximum value of a plurality of preset pressure drops corresponding to a plurality of pressure drop gears, if so, determining a first dislocation blowing sequence of each blowing valve based on the distance between a plurality of blowing valves in a filter bag area of the dust collector and the dust inlet; the type of the first staggered blowing sequence is a multi-blowing type in which a group of blowing valves are opened at the same time;
if not, determining a second staggered injection sequence of each injection valve based on the distances between the injection valves and the dust inlet in the filter bag area of the dust remover; the second staggered injection sequence is of a single injection type in which one injection valve is opened at the same time.
8. An ash removal jetting device of dust remover filter bag, characterized by, the device includes: the device comprises an acquisition module, an inter-group blowing interval duration determination module, a blowing mode determination module and an ash removal module;
The acquisition module is used for acquiring the inlet-outlet pressure difference of the filter bag area of the dust remover; an air inlet pipe penetrating through the filter bag area is arranged in the dust remover, one end of the air inlet pipe is a dust inlet, and the other end of the air inlet pipe is a dust outlet; the pressure difference between the inlet and the outlet is the difference between the air pressure of the dust inlet and the air pressure of the dust outlet;
the inter-group injection interval duration determining module is used for determining the inter-group injection interval duration from the moment when the pressure difference between the inlet and the outlet is equal to the current preset pressure drop to the moment when the ash removal injection flow of the previous group is finished; the group of ash removal blowing flows comprises ash removal blowing flows of a plurality of rounds;
the blowing mode determining module is used for determining a blowing mode based on the inter-group blowing interval duration and a preset mode determining rule; the spraying mode comprises constant-pressure spraying and timing spraying;
the ash removal module is used for executing a group of ash removal blowing processes on the filter bag of the dust remover based on the blowing mode and a preset blowing rule.
9. A dust remover, characterized in that the dust remover comprises the ash cleaning and blowing device of the dust remover filter bag of claim 8.
10. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein computer instructions which, when run on a dust remover, perform the steps of the dust cleaning blowing method of the dust remover filter bag of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310638632.XA CN116651094A (en) | 2023-05-31 | 2023-05-31 | Dust removing and blowing method and related device for filter bag of dust remover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310638632.XA CN116651094A (en) | 2023-05-31 | 2023-05-31 | Dust removing and blowing method and related device for filter bag of dust remover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116651094A true CN116651094A (en) | 2023-08-29 |
Family
ID=87721968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310638632.XA Pending CN116651094A (en) | 2023-05-31 | 2023-05-31 | Dust removing and blowing method and related device for filter bag of dust remover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116651094A (en) |
-
2023
- 2023-05-31 CN CN202310638632.XA patent/CN116651094A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10675579B2 (en) | Method and system for predicting residual useful life of an air filter | |
| KR100297415B1 (en) | Regeneration Control Method of Water Treatment System | |
| EP1916394A1 (en) | Exhaust gas purifying apparatus, exhaust gas purifying method, and particulate matter measuring method | |
| US20120137890A1 (en) | Dust-removing apparatus | |
| EP1914537A1 (en) | Particulate matter sensor | |
| JP6197377B2 (en) | Exhaust purification device | |
| CN109653852A (en) | A kind of diesel particulate trap deashing processing determination method and device | |
| CN101626837A (en) | Estimate the method for ESP dustiness and the method and apparatus of control ESP rapping | |
| KR102139147B1 (en) | Filtration and dust collector monitoring system | |
| CN105201607B (en) | Estimate the system and method for accumulation grain amount in the particulate filter of diesel engine | |
| CN101623577A (en) | Method for determining life of filters in bag house and filter monitoring system | |
| CN116651094A (en) | Dust removing and blowing method and related device for filter bag of dust remover | |
| TW201943469A (en) | Machine foam cleaning system with integrated sensing | |
| KR102139146B1 (en) | Filter dust collector and Control method of bag filter pulsing of filter dust collector | |
| JP4117566B2 (en) | Bug filter and its operation method | |
| CN211174281U (en) | Particle trapping device and tail gas treatment equipment | |
| CN111025901B (en) | Pipeline cleaning period prediction method and platform | |
| KR101104837B1 (en) | Regeneration apparatus and its method for filtration system with ceramic candle filters | |
| JP7051474B2 (en) | Chemical cleaning equipment and chemical cleaning method using it | |
| CN1072024C (en) | Cost-oriented control of a regenerable filter | |
| US20190240608A1 (en) | Determination of Dust Load in a Bag Filter | |
| JP2003001036A (en) | Pulse cleaning method for multi-chamber bag filter | |
| JP2014180619A (en) | Backwashing apparatus and backwashing method for bag filter | |
| JPH0293340A (en) | Detection of damaged filter cloth in bag filter | |
| CN211706124U (en) | High-pressure full-automatic modularized backwashing filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |