CN113577923A - Pulse blowing dust collector - Google Patents
Pulse blowing dust collector Download PDFInfo
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- CN113577923A CN113577923A CN202010362744.3A CN202010362744A CN113577923A CN 113577923 A CN113577923 A CN 113577923A CN 202010362744 A CN202010362744 A CN 202010362744A CN 113577923 A CN113577923 A CN 113577923A
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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
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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
- B01D46/04—Cleaning filters
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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
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
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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
- B01D46/42—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
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- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention provides a pulse blowing dust collector, which is characterized by comprising the following components: a filter unit for filtering dust in a gas, the filter unit having a differential pressure sensor and a dust concentration detector; the air compression part is used for providing compressed air for the filtering part for blowing so as to blow off the dust filtered by the filtering part, and is provided with an air bag, an air bag pressure sensor and a pulse valve which are communicated with the filtering part through an air outlet; the ash cleaning part is used for collecting the dust filtered by the filtering part; the power part is used for providing power for the air compressing part and is provided with an air compressor and a pressure reducing valve; and the control part comprises a storage unit, a pulse valve switch control unit and a pulse valve operation control unit, wherein the storage unit is respectively connected with and communicates with the dust concentration detector and the pulse valve, the pulse valve switch control unit is respectively connected with and communicates with the pulse valve and the differential pressure sensor, and the pulse valve operation control unit is respectively connected with and communicates with the pressure reducing valve and the differential pressure sensor.
Description
Technical Field
The invention belongs to the field of dust collectors, and particularly relates to a pulse blowing dust collector.
Background
The pulse blowing dust collector is a dust removing equipment which utilizes a filter part made of filter material to filter and collect dust, and utilizes a pulse valve to release compressed gas with certain air pressure to enter the filter part to remove the filtered dust. Fig. 3 shows a pulse blowing dust collector in the prior art, which is composed of a power part, a filter part 1, an ash cleaning part 2, an ash conveying part 3 and an air compressing part 4. The filter unit 1 is used for filtering dust in gas and has a differential pressure sensor 5 provided at a gas inlet and a gas outlet thereof; the ash cleaning part 2 is used for collecting the dust filtered by the filtering part 1; the ash conveying part 3 is used for outputting the dust collected by the ash cleaning part 2. The gas compressing unit 4 is for supplying compressed gas to the filter unit 1 and blowing the compressed gas, and includes a gas bag 6 communicating with the gas outlet of the filter unit 1 and a pulse valve 7 provided between the gas bag 6 and the gas outlet. The power part includes an air compressor for supplying power to the air compressing part 4, and a fan for supplying power to the filtering part 1. In the prior art, instructions and rules are set for each system through a PLC system, a fan, an air compressor and a lift valve are started, the upper limit value of a differential pressure sensor is set for ash removal and blowing, and parameters such as pulse width, interval, period and the like of ash removal are unchanged according to preset values.
However, due to the variety of parameters of the filtering material, the dust to be filtered, the filtering air speed, etc., the filtering and dust removing effects and efficiencies are different. The existing control system can only perform customized operations such as ash removal and ash conveying through a pressure difference value or a time sequence rule, the ash removal is not performed or excessive, secondary dust can be generated due to the fact that the ash removal is not performed, the ash removal is excessive, the filter part is damaged and the service life is shortened, and the energy consumption of compressed gas is increased, so that the problem of waste and the like is solved.
Therefore, aiming at the characteristics of pulse blowing, the main parameters of a control system influencing filtration, ash removal and ash conveying are urgently needed to be researched, and a control system capable of automatically adjusting variable parameters is obtained, so that a pulse blowing dust collector with better operation performance is developed.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a pulse blowing dust collector.
The invention provides a pulse blowing dust collector, which is characterized by comprising the following components: a filter unit for filtering dust in the gas, the filter unit having a differential pressure sensor provided at a gas inlet and a gas outlet thereof, and a dust concentration detector provided at the gas outlet; the air compression part is used for providing compressed air for the filtering part for blowing so as to blow off the dust filtered by the filtering part, and is provided with an air bag communicated with the filtering part through an air outlet, an air bag pressure sensor arranged on the air bag and a pulse valve arranged between the air bag and the air outlet; the ash cleaning part is used for collecting the dust filtered by the filtering part; the power part is used for providing power for the air compressing part and is provided with an air compressor communicated with the air bag and a pressure reducing valve arranged between the air compressor and the air bag; the control part comprises a storage unit, a pulse valve switch control unit, a pulse valve operation control unit and a pressure reducing valve control unit, wherein the pulse valve switch control unit is respectively connected and communicated with a dust concentration detector and a pulse valve, when a filter bag of the filter part is damaged, the dust concentration detector generates a bag leakage and bag breakage signal, the pulse valve switch control unit generates a pulse valve closing instruction according to the bag leakage and bag breakage signal, the pulse valve corresponding to the filter part stops operating according to the pulse valve closing instruction, the pulse valve operation control unit is respectively connected and communicated with the pulse valve and a differential pressure sensor, the differential pressure sensor is used for detecting a difference value between pressure values of a gas inlet and a gas outlet after each injection, the difference value is used as an actual pressure difference value to generate a differential pressure signal, the storage unit stores different preset pulse modes, and the pulse valve operation control unit selects the preset pulse mode according to the differential pressure signal to generate the pulse valve operation instruction, the pulse valve operates according to the pulse valve operation instruction, the pressure reducing valve control unit is connected with the pressure reducing valve and the differential pressure sensor and communicates respectively, the storage unit further stores different preset opening degree modes, the pressure reducing valve control unit selects the preset opening degree mode according to the differential pressure signal and generates a pressure reducing valve opening degree instruction, and the pressure reducing valve is opened according to the pressure reducing valve opening degree instruction adjusting period.
The pulse blowing dust collector provided by the invention can also have the following characteristics: the preset pulse mode is the operation parameters of the pulse valve, and the operation parameters comprise pulse width, pulse sequence, pulse interval, pulse period and single-valve blowing repetition times.
The pulse blowing dust collector provided by the invention can also have the following characteristics: the storage unit further stores preset pulse patterns corresponding to a preset differential pressure value and different first differential pressure comparison difference values respectively, the first differential pressure comparison difference value is a difference value between an actual differential pressure value and the preset differential pressure value, when the differential pressure sensor generates a differential pressure signal, the pulse valve operation control unit obtains the actual differential pressure value according to the differential pressure signal, then calculates a difference value between the actual differential pressure value and the preset differential pressure value to obtain the first differential pressure comparison difference value, and then selects the corresponding preset pulse pattern from the storage unit according to the first differential pressure comparison difference value.
The pulse blowing dust collector provided by the invention can also have the following characteristics: the storage unit also stores a preset pressure difference minimum value and a preset pressure difference maximum value, the preset opening degree mode comprises a reducing mode, an increasing mode and a maintaining mode, when the pressure difference sensor generates a pressure difference signal, the pressure reducing valve control unit obtains an actual pressure difference value according to the pressure difference signal, then the actual pressure difference value is respectively compared with the preset pressure difference minimum value and the preset pressure difference maximum value, if the actual pressure difference value is smaller than the preset pressure difference minimum value, the pressure reducing valve control unit selects the reducing mode from the storage unit and generates a pressure reducing valve reducing instruction, the opening degree of the pressure reducing valve is reduced according to the pressure reducing valve reducing instruction, if the actual pressure difference value is larger than the preset pressure difference maximum value, the pressure reducing valve control unit selects the increasing mode from the storage unit and generates a pressure reducing valve increasing instruction, the opening degree of the pressure reducing valve is increased according to the pressure reducing valve increasing instruction, if the actual pressure difference value is larger than or equal to the preset pressure difference minimum value and smaller than or equal to the preset pressure difference maximum value, the pressure reducing valve control unit selects a maintaining invariable mode from the storage unit and generates a pressure reducing valve maintaining invariable command, and the opening degree of the pressure reducing valve is invariable according to the pressure reducing valve maintaining invariable command.
The pulse blowing dust collector provided by the invention can also have the following characteristics: the power part is also used for providing power for the filtering part and comprises a fan used for exhausting air so as to enable the air to enter the filtering part, and the control part is also connected with the fan and is communicated with the fan so as to send a corresponding control command to the fan and control the opening and closing of the fan.
The pulse blowing dust collector provided by the invention can also have the following characteristics: the control part further comprises a blowdown valve control unit, the blowdown valve control unit is respectively connected and communicated with the air bag blowdown valve and the air bag pressure sensor, the air bag pressure sensor is used for detecting a pressure change value in the air bag after one-time injection and generating an air bag pressure signal, the storage unit further stores a preset injection air consumption value, after the air compression part performs one-time injection, the air bag pressure sensor generates an air bag pressure signal, the blowdown valve control unit calculates the injection air consumption value of the pulse valve according to the air bag pressure signal and then judges whether the injection air consumption value is smaller than the preset injection air consumption value, if so, a blowdown valve opening instruction is generated, and the blowdown valve is opened according to the blowdown valve opening instruction.
The pulse blowing dust collector provided by the invention can also have the following characteristics: wherein, the deashing portion has the dust and collects the chamber, the charge level indicator and strike the hammer, the charge level indicator sets up on the dust is collected the chamber, a position for detecting the dust of collecting the intracavity collected of dust, strike the hammer setting on the dust is collected the chamber, thereby it makes the dust collect the intracavity discharge from the dust to be used for striking the dust and collect the chamber, the control portion still includes strikes hammer the control unit, this strikes hammer the control unit and is connected and communicate with the charge level indicator and strike the hammer respectively, when the position of the dust of intracavity was collected to the dust reached the setting value, the charge level indicator generates first position signal, strike hammer the control unit and strike the start command according to first position signal generation, strike the hammer and begin to strike according to first predetermined frequency according to striking the start command.
The pulse blowing dust collector provided by the invention can also have the following characteristics: the storage unit further stores a preset descending speed, after the knocking hammer knocks for a preset time, the material level meter generates a second position signal containing the position of dust before knocking and the position of dust after knocking, the knocking hammer control unit calculates the actual descending speed of the dust in the collection cavity according to the second position signal, then the actual descending speed is compared with the preset descending speed, if the actual descending speed is smaller than the preset descending speed, a frequency increasing instruction is generated, the knocking hammer increases the knocking frequency according to the frequency increasing instruction, if the actual descending speed is larger than the preset descending speed, a frequency reducing instruction is generated, and the knocking hammer reduces the knocking frequency according to the frequency reducing instruction.
The pulse blowing dust collector provided by the invention can also have the following characteristics that: and the ash conveying part is arranged below the dust collecting cavity and used for outputting the dust collected by the ash cleaning part.
Action and Effect of the invention
According to the pulse blowing dust collector, the control part comprises the pulse valve switch control unit, the dust concentration detector is arranged at the gas outlet of the filtering part, the pulse valve switch control unit is respectively connected and communicated with the dust concentration detector and the pulse valve, when the filter bag of the filtering part is damaged, the dust concentration detector generates a bag leakage and bag breaking signal, the pulse valve switch control unit generates a pulse valve closing instruction according to the bag leakage and bag breaking signal, and the pulse valve corresponding to the filtering part stops running according to the pulse valve closing instruction.
In addition, the control part also comprises a pulse valve operation control unit, the pulse valve operation control unit is respectively connected with and communicates with the differential pressure sensor and the pulse valve, the differential pressure sensor can detect the actual differential pressure value at the gas inlet and the gas outlet after each injection and generate a differential pressure signal, the storage unit stores different preset pulse modes, the pulse valve operation control unit selects the preset pulse mode according to the differential pressure signal and generates a pulse valve operation instruction, the pulse valve operates according to the pulse valve operation instruction, the problems that in the prior art, the control part can only perform ash cleaning injection according to the set upper limit value of the differential pressure sensor, and the ash cleaning is performed only according to a certain fixed pulse mode, so that the ash cleaning is not performed or the ash cleaning is excessive are solved. Therefore, the pulse blowing dust collector can realize better dust cleaning effect.
In addition, control portion still includes relief pressure valve control unit, power portion is still including setting up the relief pressure valve between air compressor machine and gas bag, relief pressure valve control unit is connected and communicates with differential pressure sensor and relief pressure valve respectively, the memory cell still stores the different degree of opening modes of predetermineeing, relief pressure valve control unit presets the degree of opening mode and generates the relief pressure valve degree of opening instruction according to differential pressure signal selection, the size is opened according to relief pressure valve degree of opening instruction adjustment phase, thereby the pressure in the automatically regulated gas bag, avoid the deashing not hard or the deashing excessive, realize better deashing effect.
Drawings
FIG. 1 is a schematic view showing the structure of a pulse blowing dust collector in an embodiment of the present invention;
FIG. 2 is a block diagram showing a configuration of a control section in the embodiment of the present invention;
FIG. 3 is a schematic view of a pulse blow-off and dust collector in the prior art.
Detailed Description
In order to make the technical means, creation features, achievement objects and effects of the present invention easy to understand, the following embodiments are specifically described with reference to the accompanying drawings.
FIG. 1 is a schematic view showing the structure of a pulse blowing dust collector in the embodiment of the present invention.
As shown in fig. 1, the pulse blowing dust collector 100 of the present embodiment includes a filter unit 10, an air compressing unit 20, an ash removing unit 30, an ash conveying unit 40, a power unit, and a control unit 60.
The filter unit 10 is used for filtering dust in gas, and includes a filter unit 11 made of a filter material, a differential pressure sensor 12 provided at a gas inlet and a gas outlet of the filter unit 10, and a dust concentration detector 13 and a poppet valve 14 provided at the gas outlet of the filter unit 10. The differential pressure sensor 12 detects a difference between pressure values at the gas inlet and the gas outlet of the filter unit 10 after each injection, and generates a differential pressure signal by using the difference as an actual differential pressure value. The dust concentration detector 13 is configured to generate a bag leakage/breakage signal when the filter bag of the filter unit 11 is broken. The poppet valve 14 serves to communicate or close the gas outlet of the filter portion 10 with the outside.
The air compressing part 20 is used for supplying compressed air to the filter part 10 for blowing, so that the dust filtered by the filter unit 11 is blown off from the outer surface of the filter bag. The air compressing portion 20 has an air bag 21, an air bag pressure sensor 22, a pulse valve 23, and an air bag blowoff valve 24.
The air bag 21 is used for containing compressed air for blowing, and is communicated with the air outlet of the filter part 10.
The air bag pressure sensor 22 is arranged on the air bag 21 and used for detecting the pressure change value in the air bag 21 after one-time blowing and generating an air bag pressure signal.
The pulse valve 23 is provided between the air bag 21 and the gas outlet of the filter unit 10, and controls the amount of blowing gas during blowing. By adjusting the operating parameters of the pulse valve 23, including pulse width, pulse sequence, pulse interval, pulse period, and the number of single-valve blowing repetitions, the soot cleaning effect can be directly influenced.
The air bag blow-off valve 24 is arranged on the air bag 21 and used for discharging accumulated liquid in the air bag 21. Because compressed gas contains certain profit, these profit (hydrops) can be accumulated in the gas pocket, progressively reduce the gas pocket volume, cause the blowing tolerance to reduce, consequently need when the hydrops accumulates to certain extent, discharge the hydrops.
The ash removing part 30 is used for collecting the dust filtered by the filter part 10, and has a dust collecting cavity 31, a level gauge 32 and a knocking hammer 33.
The dust collecting chamber 31 is disposed below the filter unit 10 and is used for receiving dust blown off by the blowing air flow. A level gauge 32 is provided on the dust collection chamber 31 for detecting the position of the dust collected in the dust collection chamber 31. A rapping hammer 33 is arranged on the dust collection chamber 31 for rapping the dust collection chamber 31 to discharge dust from the dust collection chamber.
The dust conveying part 40 is arranged below the dust collecting cavity and is used for containing the dust discharged from the dust collecting cavity 31 and outputting the dust.
The power part is used for providing power for the air compressing part 20 and the filtering part 10. The power part is provided with an air compressor, a fan and a pressure reducing valve.
The air compressor is communicated with the air bag 21 and is used for producing compressed air and conveying the compressed air to the air bag 21. The pressure reducing valve is arranged between the air compressor and the air bag 21 and used for controlling the air quantity of the compressed air conveyed to the air bag 21 by the air compressor and further controlling the pressure in the air bag 21. The fan is used to discharge air so that gas (dust) enters the filter portion 10.
Fig. 2 is a block diagram of a control unit according to an embodiment of the present invention.
As shown in fig. 2, the control unit 60 is used for controlling the operations of the filtering unit 10, the air compressing unit 20, the ash removing unit 30 and the power unit, and includes a storage unit 61, a pulse valve switching control unit 62, a pulse valve operation control unit 63, a pressure reducing valve control unit 64, a blow-down valve control unit 65, a knocking hammer control unit 66, a fan control unit 67, a poppet valve control unit 68 and an input display unit 69.
The storage unit 61 stores different preset pulse patterns, different preset opening degree patterns, a preset pressure difference value, a first pressure difference comparison difference value, a preset pressure difference minimum value, a preset pressure difference maximum value, a preset blowing air consumption value, a first preset frequency, a preset time and a preset descending speed.
And each preset pulse mode corresponds to different first differential pressure comparison difference values respectively. The preset pulse mode is a preset pulse mode, and the pulse mode is an operation parameter of the pulse valve 23, and the operation parameter includes pulse width, pulse sequence, pulse interval, pulse period and the number of single-valve blowing repetition. The preset opening degree mode comprises a small adjustment mode, a large adjustment mode and a constant maintenance mode. The first differential pressure comparison difference is the difference between the actual differential pressure value detected by the differential pressure sensor 12 and the predetermined differential pressure value.
Various information stored in the storage unit 61 can be directly set by a person skilled in the art through the input display unit 69. The input display unit 69 is, for example, a PC having an input display function.
The pulse valve switch control unit 62 is connected to and communicates with the dust concentration detector 13 and the pulse valve 23, respectively.
When the filter bag of the filter part 10 is damaged, the dust concentration detector 13 generates a bag leakage and bag breakage signal; then the pulse valve switch control unit 62 receives the bag leakage and bag breaking signal and generates a pulse valve closing instruction according to the bag leakage and bag breaking signal; the pulse valve 23 corresponding to the filter unit 10 receives a pulse valve closing command and stops its operation according to the pulse valve closing command.
The pulse valve operation control unit 63 is connected to and communicates with the differential pressure sensor 12 and the pulse valve 23, respectively.
When the differential pressure sensor 12 generates a differential pressure signal, the pulse valve operation control unit 63 receives the differential pressure signal and obtains an actual differential pressure value according to the differential pressure signal, then calculates a difference value between the actual differential pressure value and a predetermined differential pressure value to obtain a first differential pressure comparison difference value, and then selects a preset pulse mode corresponding to the first differential pressure comparison difference value from the storage unit 61 according to the first differential pressure comparison difference value and generates a pulse valve operation instruction; the pulse valve 23 receives the pulse valve operation command and operates according to the operation parameters included in the pulse valve operation command.
The pressure reducing valve control unit 64 is connected to and communicates with the differential pressure sensor 12 and the pressure reducing valve, respectively.
When the differential pressure sensor 12 generates a differential pressure signal, the pressure reducing valve control unit 64 receives the differential pressure signal and obtains an actual differential pressure value according to the differential pressure signal, then compares the actual differential pressure value with a predetermined differential pressure minimum value and a predetermined differential pressure maximum value respectively, and selects a preset opening degree mode according to a comparison result and generates a pressure reducing valve opening degree instruction, and the pressure reducing valve adjusts the opening size of the pressure reducing valve according to the pressure reducing valve opening degree instruction.
The specific process of adjusting the opening size of the pressure reducing valve according to different comparison results comprises the following steps:
if the actual differential pressure value is smaller than the minimum value of the preset differential pressure, which indicates that the ash removal is excessive, the pressure reducing valve control unit 64 selects a reduction mode from the storage unit 61 and generates a pressure reducing valve reduction instruction, and the pressure reducing valve receives the pressure reducing valve reduction instruction and reduces the opening degree according to the pressure reducing valve reduction instruction, so that the blowing pressure is reduced;
if the actual differential pressure value is larger than the maximum value of the preset differential pressure, the blowing pressure is insufficient, and the pressure of the air bag needs to be increased, the pressure reducing valve control unit 64 selects an increasing mode from the storage unit 61 and generates a pressure reducing valve increasing instruction, and the pressure reducing valve receives the pressure reducing valve increasing instruction and increases the opening degree according to the pressure reducing valve increasing instruction, so that the blowing pressure is increased;
if the actual differential pressure value is greater than or equal to the predetermined minimum differential pressure value and less than or equal to the predetermined maximum differential pressure value, which indicates that the blowing pressure is appropriate, the pressure reducing valve control unit 64 selects the maintaining unchanged mode from the storage unit 61, and generates a pressure reducing valve maintaining unchanged command, and the pressure reducing valve receives the pressure reducing valve maintaining unchanged command and maintains the opening degree unchanged according to the command.
The blowdown valve control unit 65 is connected to and in communication with the air bag blowdown valve 24 and the air bag pressure sensor 22, respectively.
After the air compressing part 20 performs primary blowing, the air bag pressure sensor 22 generates an air bag pressure signal, the blow-off valve control unit 65 receives the air bag pressure signal and calculates the blowing air consumption value of the pulse valve 23 according to the air bag pressure signal, then whether the blowing air consumption value is smaller than a preset blowing air consumption value is judged, and if the blowing air consumption value is smaller than the preset blowing air consumption value, a blow-off valve opening instruction is generated; the blowoff valve 24 receives a blowoff valve opening command and opens according to the blowoff valve opening command, so that the accumulated liquid in the air bag is discharged.
The rapping hammer control unit 66 is connected to and communicates with the level gauge 32 and the rapping hammers 33, respectively.
When the position of the dust in the dust collection chamber 31 reaches a set value, the level gauge 32 generates a first position signal, and the rapping hammer control unit 66 receives the first position signal and generates a rapping start instruction based on the first position signal; the rapping hammer receives a rapping start command and the command starts rapping at a first predetermined frequency. The first predetermined frequency is a preset frequency.
After the knocking hammer knocks for a predetermined time at a first predetermined frequency, the level gauge 32 generates a second position signal containing the position of the dust before knocking and the position of the dust after knocking; the knocking hammer control unit 66 receives the second position signal, calculates the actual descending speed of the dust in the collection cavity according to the second position signal, compares the actual descending speed with the preset descending speed, generates a frequency increasing instruction if the actual descending speed is smaller than the preset descending speed, and increases the knocking frequency according to the frequency increasing instruction; if the actual descending speed is greater than the preset descending speed, a frequency reduction instruction is generated, and the knocking hammer reduces the knocking frequency according to the frequency reduction instruction; if the actual descent speed is equal to the predetermined descent speed, the hammer control unit 66 does not generate any instruction.
The fan control unit 67 is connected to and communicates with the fan, and the poppet valve control unit 68 is connected to and communicates with the poppet valve 14. The fan control unit 67 and the poppet valve control unit 68 control the opening and closing of the corresponding fan and poppet valve 14 according to a timing control means in the related art.
In this embodiment, each unit of the control unit 60 except the input display unit 69 is a single chip microcomputer development circuit, and may be integrated or modularized and assembled on a main board.
Effects and effects of the embodiments
According to the pulse blowing dust collector of the present embodiment, since the control unit includes the pulse valve switch control unit, the dust concentration detector is disposed at the gas outlet of the filtering unit, the pulse valve switch control unit is connected to and communicates with the dust concentration detector and the pulse valve, respectively, when the filter bag of the filtering unit is damaged, the dust concentration detector generates a bag leakage and bag breakage signal, the pulse valve switch control unit generates a pulse valve closing instruction according to the bag leakage and bag breakage signal, and the pulse valve corresponding to the filtering unit stops operating according to the pulse valve closing instruction, the pulse blowing dust collector of the present embodiment can timely find the bag leakage and bag breakage condition and close the corresponding pulse valve, thereby avoiding the problems of insufficient dust cleaning and high energy consumption.
In addition, the control part also comprises a pulse valve operation control unit, the pulse valve operation control unit is respectively connected with and communicates with the differential pressure sensor and the pulse valve, the differential pressure sensor can detect the actual differential pressure value at the gas inlet and the gas outlet after each injection and generate a differential pressure signal, the storage unit stores different preset pulse modes, the pulse valve operation control unit selects the preset pulse mode according to the differential pressure signal and generates a pulse valve operation instruction, the pulse valve operates according to the pulse valve operation instruction, the problems that in the prior art, the control part can only perform ash cleaning injection according to the set upper limit value of the differential pressure sensor, and the ash cleaning is performed only according to a certain fixed pulse mode, so that the ash cleaning is not performed or the ash cleaning is excessive are solved. Therefore, the pulse blowing dust collector of the embodiment can realize better dust cleaning effect.
In addition, control portion still includes relief pressure valve control unit, power portion is still including setting up the relief pressure valve between air compressor machine and gas bag, relief pressure valve control unit is connected and communicates with differential pressure sensor and relief pressure valve respectively, the memory cell still stores the different degree of opening modes of predetermineeing, relief pressure valve control unit presets the degree of opening mode and generates the relief pressure valve degree of opening instruction according to differential pressure signal selection, the size is opened according to relief pressure valve degree of opening instruction adjustment phase, thereby the pressure in the automatically regulated gas bag, avoid the deashing not hard or the deashing excessive, realize better deashing effect.
Furthermore, the preset pulse mode is an operation parameter of the pulse valve, the operation parameter comprises pulse width, pulse sequence, pulse interval, pulse period and single-valve blowing repetition number, the parameters are key parameters influencing the blowing effect of the air compressing part, and better blowing effect can be realized by setting different preset pulse modes containing the parameters.
Further, the storage unit further stores a preset pressure difference value and preset pulse patterns respectively corresponding to different first pressure difference comparison difference values, the first pressure difference comparison difference value is a difference value between an actual pressure difference value and the preset pressure difference value, when the differential pressure sensor generates a differential pressure signal, the pulse valve operation control unit obtains the actual pressure difference value according to the differential pressure signal, then calculates a difference value between the actual pressure difference value and the preset pressure difference value to obtain the first pressure difference comparison difference value, and then selects the corresponding preset pulse pattern from the storage unit according to the first pressure difference comparison difference value. Through the mode, the preset pulse mode can be better selected according to the actual condition of blowing, and further a better blowing effect is realized.
Further, the storage unit further stores a preset pressure difference minimum value and a preset pressure difference maximum value, the preset opening degree mode comprises a reducing mode, an increasing mode and a maintaining mode, when the differential pressure sensor generates a differential pressure signal, the pressure reducing valve control unit obtains an actual pressure difference value according to the differential pressure signal, then the actual pressure difference value is respectively compared with the preset pressure difference minimum value and the preset pressure difference maximum value, if the actual pressure difference value is smaller than the preset pressure difference minimum value, the pressure reducing valve control unit controls the opening degree of the pressure reducing valve to be reduced, if the actual pressure difference value is larger than the preset pressure difference maximum value, the pressure reducing valve control unit controls the opening degree of the pressure reducing valve to be increased, and otherwise, the pressure reducing valve control unit controls the opening degree of the pressure reducing valve to be unchanged. Through the mode, the opening degree of the pressure reducing valve can be better adjusted according to the actual condition of blowing, and further a better blowing effect is achieved.
Further, still be provided with the gas bag blowoff valve on the gas bag, the control division still includes blowoff valve control unit, this blowoff valve control unit is connected and communicates with gas bag blowoff valve and gas bag pressure sensor respectively, gas bag pressure sensor can detect the pressure variation value in the gas bag after once jetting and generate the gas bag pressure signal, memory cell still stores predetermined jetting gas consumption value, after the portion of calming anger carries out once jetting, gas bag pressure sensor generates the gas bag pressure signal, blowoff valve control unit calculates the jetting gas consumption value of pulse valve according to the gas bag pressure signal, then judge whether jetting gas consumption value is less than predetermined jetting gas consumption value, if judge, generate the blowoff valve and open the instruction, the blowoff valve opens according to the blowoff valve. Through the arrangement, the problem that the injection gas amount is reduced due to the fact that the compressed gas contains certain oil and water which can be accumulated in the gas bag and the volume of the gas bag is gradually reduced can be solved.
Further, the deashing portion has dust collection chamber, charge level indicator and strikes the hammer, and the control division still includes strikes hammer the control unit, should strike hammer the control unit and be connected and communicate with charge level indicator and strike the hammer respectively. When the position of dust in the dust collecting cavity reaches a set value, the material level meter generates a first position signal, the knocking hammer control unit generates a knocking starting instruction according to the first position signal, and the knocking hammer starts knocking according to a first preset frequency according to the knocking starting instruction. The storage unit further stores a preset descending speed, after the knocking hammer knocks for a preset time, the material level meter generates a second position signal containing the position of dust before knocking and the position of dust after knocking, the knocking hammer control unit calculates the actual descending speed of the dust in the collection cavity according to the second position signal, then the actual descending speed is compared with the preset descending speed, if the actual descending speed is smaller than the preset descending speed, a frequency increasing instruction is generated, the knocking hammer increases the knocking frequency according to the frequency increasing instruction, if the actual descending speed is larger than the preset descending speed, a frequency reducing instruction is generated, and the knocking hammer reduces the knocking frequency according to the frequency reducing instruction. Therefore, the pulse blowing and dust collecting device in the embodiment can realize the automatic knocking of the knocking hammer, and can flexibly adjust the knocking frequency of the knocking hammer according to the actual situation to realize better knocking effect.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (9)
1. A pulse blowing dust collector is characterized by comprising:
a filter unit for filtering dust in a gas, the filter unit including a differential pressure sensor provided at a gas inlet and a gas outlet thereof, and a dust concentration detector provided at the gas outlet;
the air compressing part is used for supplying compressed air to the filtering part for blowing so as to blow off the dust filtered by the filtering part, and is provided with an air bag communicated with the filtering part through the air outlet, an air bag pressure sensor arranged on the air bag and a pulse valve arranged between the air bag and the air outlet;
the ash cleaning part is used for collecting the dust filtered by the filtering part; and
the power part is used for providing power for the air compressing part and is provided with an air compressor communicated with the air bag and a pressure reducing valve arranged between the air compressor and the air bag;
a control part including a storage unit, a pulse valve switch control unit, a pulse valve operation control unit, and a pressure reducing valve control unit,
wherein the pulse valve switch control unit is connected and communicated with the dust concentration detector and the pulse valve respectively,
when the filter bag of the filter part is damaged, the dust concentration detector generates a bag leakage and breaking signal, the pulse valve switch control unit generates a pulse valve closing instruction according to the bag leakage and breaking signal, the pulse valve corresponding to the filter part stops running according to the pulse valve closing instruction,
the pulse valve operation control unit is respectively connected with and communicated with the pulse valve and the differential pressure sensor, the differential pressure sensor is used for detecting a difference value between pressure values of the gas inlet and the gas outlet after each injection, the difference value is used as an actual pressure difference value to generate a differential pressure signal, the storage unit stores different preset pulse modes, the pulse valve operation control unit selects the preset pulse modes according to the differential pressure signal to generate a pulse valve operation instruction, and the pulse valve operates according to the pulse valve operation instruction,
the pressure reducing valve control unit is respectively connected with and communicates with the pressure reducing valve and the differential pressure sensor, the storage unit further stores different preset opening degree modes, the pressure reducing valve control unit selects the preset opening degree modes according to the differential pressure signal and generates a pressure reducing valve opening degree instruction, and the pressure reducing valve adjusts the opening size in the period according to the pressure reducing valve opening degree instruction.
2. The pulse blow off, dust collector of claim 1, wherein:
the preset pulse mode is an operation parameter of the pulse valve, and the operation parameter comprises pulse width, pulse sequence, pulse interval, pulse period and single-valve blowing repetition times.
3. The pulse blow off, dust collector of claim 1, wherein:
wherein the storage unit further stores a predetermined differential pressure value and the preset pulse patterns respectively corresponding to different first differential pressure comparison difference values, the first differential pressure comparison difference value is a difference value between the actual differential pressure value and the predetermined differential pressure value,
when the differential pressure sensor generates the differential pressure signal, the pulse valve operation control unit obtains the actual differential pressure value according to the differential pressure signal, then calculates the difference value between the actual differential pressure value and the preset differential pressure value so as to obtain a first differential pressure comparison difference value, and then selects the corresponding preset pulse mode from the storage unit according to the first differential pressure comparison difference value.
4. The pulse blow off, dust collector of claim 1, wherein:
wherein the storage unit further stores a preset pressure difference minimum value and a preset pressure difference maximum value, the preset opening degree mode comprises a reducing mode, an increasing mode and a maintaining and unchanging mode,
when the differential pressure sensor generates the differential pressure signal, the pressure reduction valve control unit obtains the actual pressure difference value according to the differential pressure signal, and then compares the actual pressure difference value with the preset pressure difference minimum value and the preset pressure difference maximum value respectively,
if the actual differential pressure value is smaller than the preset differential pressure minimum value, the pressure reducing valve control unit selects the reducing mode from the storage unit and generates a reducing valve reducing instruction, the opening degree of the pressure reducing valve is reduced according to the reducing valve reducing instruction,
if the actual differential pressure value is larger than the preset maximum differential pressure value, the reducing valve control unit selects the increasing mode from the storage unit and generates a reducing valve increasing instruction, the opening degree of the reducing valve increases according to the reducing valve increasing instruction,
and if the actual differential pressure value is greater than or equal to the preset differential pressure minimum value and less than or equal to the preset differential pressure maximum value, the pressure reducing valve control unit selects the constant maintaining mode from the storage unit and generates a constant maintaining instruction of the pressure reducing valve, and the opening degree of the pressure reducing valve is kept constant according to the constant maintaining instruction.
5. The pulse blow off, dust collector of claim 1, wherein:
wherein the power part is also used for providing power for the filtering part and comprises a fan used for exhausting air so as to enable the air to enter the filtering part,
the control part is also connected with and communicates with the fan, so that a corresponding control instruction is sent to the fan, and the fan is controlled to be turned on and off.
6. The pulse blow off, dust collector of claim 1, wherein:
wherein the air bag is also provided with an air bag blow-down valve used for discharging accumulated liquid in the air bag,
the control part also comprises a blowdown valve control unit which is respectively connected and communicated with the air bag blowdown valve and the air bag pressure sensor, the air bag pressure sensor is used for detecting the pressure change value in the air bag after one-time injection and generating an air bag pressure signal,
the storage unit also stores preset blowing gas consumption values,
after the air compressing part performs primary blowing, the air bag pressure sensor generates an air bag pressure signal,
the blowoff valve control unit calculates the blowing gas consumption value of the pulse valve according to the air bag pressure signal, then judges whether the blowing gas consumption value is smaller than the preset blowing gas consumption value, if so, generates a blowoff valve opening instruction,
and the blowdown valve is opened according to the blowdown valve opening instruction.
7. The pulse blow off, dust collector of claim 1, wherein:
wherein the dust cleaning part is provided with a dust collecting cavity, a level gauge and a knocking hammer,
the charge level indicator is arranged on the dust collecting cavity and is used for detecting the position of the dust collected in the dust collecting cavity,
the knocking hammer is arranged on the dust collecting cavity and is used for knocking the dust collecting cavity so as to discharge dust from the dust collecting cavity,
the control part also comprises a knocking hammer control unit which is respectively connected with and communicated with the charge level indicator and the knocking hammer,
when the position of dust in the dust collecting cavity reaches a set value, the charge level indicator generates a first position signal, the knocking hammer control unit generates a knocking starting instruction according to the first position signal, and the knocking hammer starts knocking according to a first preset frequency according to the knocking starting instruction.
8. The pulse blow off, dust collector of claim 7, wherein:
wherein the storage unit further stores a predetermined lowering speed,
after the knocking hammer knocks for a preset time, the level indicator generates a second position signal containing the position of the dust before knocking and the position of the dust after knocking,
the knocking hammer control unit calculates the actual descending speed of the dust in the collection cavity according to the second position signal and then compares the actual descending speed with the preset descending speed,
if the actual descending speed is less than the preset descending speed, generating a frequency increasing instruction, increasing the knocking frequency by the knocking hammer according to the frequency increasing instruction,
and if the actual descending speed is greater than the preset descending speed, generating a frequency reduction instruction, and reducing the knocking frequency by the knocking hammer according to the frequency reduction instruction.
9. The pulse blow off, dust collector of claim 7, further comprising:
and the ash conveying part is arranged below the dust collecting cavity and used for outputting the dust collected by the ash cleaning part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010362744.3A CN113577923A (en) | 2020-04-30 | 2020-04-30 | Pulse blowing dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010362744.3A CN113577923A (en) | 2020-04-30 | 2020-04-30 | Pulse blowing dust collector |
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| CN113577923A true CN113577923A (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010362744.3A Pending CN113577923A (en) | 2020-04-30 | 2020-04-30 | Pulse blowing dust collector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114558399A (en) * | 2022-03-16 | 2022-05-31 | 广州华锝智能装备有限公司 | Back-blowing pressure intelligent monitoring system and monitoring method and dry separator |
| SE2350030A1 (en) * | 2023-01-16 | 2024-07-17 | Husqvarna Ab | Autocalibration functions for industrial dust extractors |
| SE2350029A1 (en) * | 2023-01-16 | 2024-07-17 | Husqvarna Ab | Advanced filter functions for industrial dust extractors |
-
2020
- 2020-04-30 CN CN202010362744.3A patent/CN113577923A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114558399A (en) * | 2022-03-16 | 2022-05-31 | 广州华锝智能装备有限公司 | Back-blowing pressure intelligent monitoring system and monitoring method and dry separator |
| SE2350030A1 (en) * | 2023-01-16 | 2024-07-17 | Husqvarna Ab | Autocalibration functions for industrial dust extractors |
| SE2350029A1 (en) * | 2023-01-16 | 2024-07-17 | Husqvarna Ab | Advanced filter functions for industrial dust extractors |
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