CN115591325A - Device and method for testing and evaluating bag type dust removal pulse blowing performance - Google Patents
Device and method for testing and evaluating bag type dust removal pulse blowing performance Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- 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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Abstract
The invention discloses a bag-type dust removal pulse injection performance test and evaluation device and a corresponding test evaluation method, which mainly comprise a host part, a dust filter cloth, an air inducing part, a dust supplying part, a pulse injection part, an air compressing and supplying part, a data processing part and an automatic control unit.
Description
Technical Field
The invention relates to the technical field of industrial dust removal, in particular to a device and a corresponding method for testing and evaluating the blowing performance of a bag type dust removal pulse.
Background
Since the fifty years, the technology of wet washing, gravity settling, cyclone separation, electrostatic adsorption, fiber filtration, electrostatic adsorption and fiber filtration composite and the like are adopted successively or parallelly in the treatment of industrial smoke dust and the recovery of valuable powder in China, and the fiber filtration technology becomes the mainstream technology of the treatment of industrial smoke dust and the recovery of powder through the industrial application and the continuous development for decades, is suitable for a plurality of harsh smoke environments and is widely applied to a plurality of industrial fields.
The bag type dust collector is a dust collecting equipment which makes filter cloth processed by fiber into a filter bag to filter and separate dust in industrial flue gas, and mainly comprises a main machine, the filter bag and a dust cleaning mechanism. When in operation, the device has two basic working states of filtration and ash removal. During filtering, dust is trapped on the outer surface of the filter bag, and when the filtering resistance gradually rises to a set value, ash removal is needed to keep the continuous filtering capacity of the dust remover. The ash removal mode comprises mechanical rapping ash removal, reverse blowing ash removal by a fan, compressed air pulse blowing ash removal and the like, and practice proves that the compressed air pulse blowing ash removal performance is the best among the modes.
The pulse blowing ash removal is realized by instantly opening and closing a pulse valve, compressed gas in a pressure stabilizing gas bag is rapidly sprayed to the inner cavities of the filter bags corresponding to the nozzles one by one through the nozzles with different diameters at the lower end of a spray pipe matched with the pulse valve, so that the filter bags are rapidly expanded and deformed from inside to outside to shake off dust on the outer surfaces of the filter bags, the filtering capacity of the filter bags is regenerated, and the running resistance of the dust collector is greatly reduced. Therefore, the pulse valve is a core component of the bag type dust collector, and the quality of the performance of the pulse valve directly influences the dust cleaning effect of the filter bag and the continuous working capacity of the bag type dust collector.
At present, pulse valve manufacturers at home and abroad and pulse valves in markets are various, the blowing performance of pulse valves of different types and different specifications is obviously different, and even pulse valves of the same type and the same specification produced by different manufacturers are also obviously different in performance. Although the structures of the existing devices for detecting the blowing performance of the pulse valves are different in China, the devices belong to static detection under the condition of no flow field, so that the blowing performance parameters of various pulse valves under different flow field conditions, the specifications and the number of the filter bags matched with the blowing performance parameters, the dust removing effect of the filter bags and the like are difficult to accurately and quantitatively provide. Therefore, a designer often has certain blindness in the configuration design, the dust removal parameter selection and the matching of the pulse valve and the filter bag of the bag type dust collector, so that the cases that the dust removal effect of the filter bag is poor, the operation resistance of the dust collector is high, even the filter bag is invalid, the dust collector is paralyzed and the engineering investment fails are rare.
With the rapid development of economy, the national requirements for controlling the quality of the atmospheric environment are more and more strict. In particular, in recent years, the nation has issued a plurality of new atmospheric pollutant emission standards for key pollution industries such as coal and electricity, steel, building materials, nonferrous metals, coking, petrochemical industry, calcium carbide and the like and key pollution sources, and the new standards make stricter regulations on pollutant emission types and emission limits. In essence these regulations also indirectly place higher demands on the performance and reliability of pulse bag precipitators.
Therefore, it is desirable to provide a more effective pulse valve performance detection device, thereby improving the performance and reliability of the pulse bag filter.
Disclosure of Invention
The invention mainly aims to provide a device and a corresponding method for testing and evaluating the blowing performance of a bag-type dust removal pulse based on different flow field conditions.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a bag type dust removal pulse jetting performance test and evaluation device which characterized in that includes:
the main machine part comprises a gas purifying chamber, a dust and gas chamber and an ash storage chamber which are arranged from top to bottom in sequence;
the dust filtering part is arranged in the main machine part and comprises a plurality of filter bags for filtering dust;
the air inducing part comprises an air inducing unit and an air pipe unit, the air inducing unit is used for providing wind power, and the air pipe unit is used for conveying the wind power;
the dust supply part is used for automatically adjusting the dust amount and conveying the dust to the filter bag by matching with the induced draft part;
the pulse injection part is arranged on the main machine part and communicated with the filter bag, the pulse injection part comprises a pressure-stabilizing air bag, a pulse valve and an injection pipe group, the pulse valve is used for controlling whether compressed air in the pressure-stabilizing air bag is output or not, and the injection pipe group is used for conveying the compressed air from the pressure-stabilizing air bag;
the air compression and supply part comprises an air compressor, and the air compressor is used for supplementing compressed air into the pressure stabilizing air bag;
the data processing part comprises a sensor module, a data acquisition module, a data processing module and a data display module, the data acquisition part is used for acquiring relevant parameters of the host part, the pressure stabilizing air bag, the pulse valve, the blowing pipe group and the detection point positions of the filter bags, and the data processing module is used for analyzing and processing data and displaying a chart through the data display module;
the dust-containing air flow is guided in from an air inlet at the bottom of the dust air chamber under the driving of the air guiding part, and is filtered by the filter bag, the purified air is discharged from an air outlet at the side part of the air purifying chamber, and the dust is discharged from the dust storage chamber.
In several embodiments, the host further includes a faceplate, the faceplate is disposed between the air purifying chamber and the dust and air chamber, the faceplate is provided with a plurality of mounting holes, and one end of the filter bag is disposed on the faceplate through the mounting holes.
In several embodiments, a plurality of the filter bags are vertically disposed within the dust and air chamber.
In some embodiments, the dust supply portion includes test dust, an automatic weighing supply device and a dust conveying pipe, the dust conveying pipe is communicated with the air inlet at the bottom of the dust air chamber, and the automatic weighing supply device is used for automatically supplying the test dust.
In several embodiments, the air compressing and supplying part further comprises an air storage tank, an oil-water separator and a pressure regulating valve which are sequentially communicated, wherein the air storage tank is communicated to the air compressor, and the pressure regulating valve is communicated to the pressure stabilizing air bag.
In several embodiments, the sensor module comprises a pressure sensor, a differential pressure sensor, a temperature sensor, a humidity sensor, a dust concentration meter, and an anemometer; the pressure sensor, the flow monitor and the dust concentration monitor are arranged at the air inlet and the air outlet of the host part and used for synchronously monitoring the inlet and outlet differential pressure, the flow and the dust emission concentration of the host part on line, and the pressure sensor is respectively arranged on the pressure stabilizing air bag, the pulse valve, the injection pipe group and the filter bag.
In a plurality of embodiments, at least one pressure sensor is arranged on the pressure-stabilizing air bag, and is used for synchronously monitoring the pressure drop of the pressure-stabilizing air bag during blowing on line and determining the blowing air volume of the pulse valve under different blowing pressures;
the jetting ports of the pulse valves are provided with pressure sensors for online synchronous monitoring of pressure values at the moment of jetting and determining valve body resistance of each pulse valve under different jetting pressures;
the blowing pipe group is provided with a plurality of pressure sensors for synchronously monitoring the pressure distribution of the nozzles under different types of pulse valves and different blowing pressures on line and determining the number of the nozzles of the blowing pipe group and the number of the filter bags corresponding to the nozzles;
a plurality of pressure sensors are distributed on the filter bag at intervals and used for monitoring pressure values of corresponding positions.
In a plurality of embodiments, a plurality of pressure sensors are arranged at intervals and uniformly from the bottom to the top of each filter bag and used for synchronously monitoring the pressure value of each measuring point during pulse injection on line and determining the length of the filter bag matched with the pulse valve;
meanwhile, the pressure value of each bag bottom during pulse injection is synchronously monitored on line through the sensor positioned at the bottom of the filter bag, so that the highest and lowest bag bottom pressure positions in the filter bag are determined, and the number of the filter bags matched with the pulse valves is determined.
Meanwhile, the invention also provides a test evaluation method with the bag-type dust removal pulse blowing performance test and evaluation device, which comprises the following steps:
in the first step, the pressure peak value P of the outlet of the pulse valve is monitored on line max : the pressure sensor arranged at the jet port of the pulse valve is used for on-line monitoring, and the acquired data is processed by a background computer to give a pressure peak value P max And corresponding pressure peak curves and reports;
and in the second step, the rise rate dP/dt of the pressure at the outlet of the pulse valve is monitored on line: monitoring the data of pressure change in the blowing moment on line through a pressure sensor arranged at a jetting port of the pulse valve, processing the acquired data through a background computer, and giving a pressure rising rate value dP/dt, a corresponding pressure change curve and a report;
and step three, monitoring the pressure drop delta P of the pressure stabilizing air bag on line w : on-line monitoring of initial pressure value P of pressure-stabilizing air bag before blowing of pulse valve by pressure sensor mounted on pressure-stabilizing air bag 0 And the final pressure value P of the pressure-stabilizing air bag after blowing 1 Processing the acquired data through a background computer, and giving a pressure drop of the pressure stabilizing air bag, a corresponding pressure change curve and a report;
step four, monitoring the resistance delta P of the pulse valve on line m : initial pressure value P of pressure-stabilizing air bag acquired on line 0 And the pressure peak P of the outlet of the pulse valve to be detected max Calculated difference Δ P = P between the two 0 －P max Obtaining and processing the acquired data through a background computer, and giving a resistance change curve and a report of the detected pulse valve;
and a fifth step of monitoring the flow quantity delta Q of the gas blown by the pulse valve on line: by monitoring the time before and after the pulse valve is injected, the initial pressure P of the pressure stabilizing air bag is monitored on line 0 Value and end pressure P 1 Processing the acquired data through a background computer, and giving out a flow value delta Q of the gas blown by the pulse valve to be detected and a corresponding blowing flow change curve and a report;
and in the sixth step, the opening and closing time t of the pulse valve is monitored on line g : the time interval from the beginning of sensing the pressure to the disappearance of the pressure is monitored on line by a pressure sensor arranged at a jet port of the pulse valve, the collected data is processed by a background computer, and the opening and closing time value t of the pulse valve is given g And corresponding time curves and reports;
and a seventh step of monitoring the highest and lowest bag bottom pressure on line: the pressure value of each bag bottom is monitored on line through a pressure sensor arranged at the bottom of each detected filter bag, the acquired data is processed through a background computer, and the sequence of the bag bottom pressure from high to low and corresponding pressure curves and reports are given;
and eighth, monitoring the pressure distribution in the filter bag with the highest and the lowest bag bottom pressure on line: a plurality of pressure sensors are arranged on the filter bags with the highest and lowest bag bottom pressures at intervals from the bag openings to the bag bottoms, the pressure distribution values in the bags are monitored on line, collected data are processed through a background computer, and an in-bag pressure distribution curve and a report are given.
In several embodiments, the pulse valve blowing gas flow rate Δ Q is calculated by the following equation:
△Q＝P 0 Q/P atm [1－(P 1 /P 0 ) 1/K ]
in the formula: q is the volume of the pressure-stabilizing air bag, P atm Is standard atmospheric pressure and K is the adiabatic index.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention provides a closed type bag-type dust removal pulse blowing performance test and evaluation device capable of simulating a working condition flow field and a test evaluation method matched with the test and evaluation device.
2. Through the simulation of the working condition flow field, the dust cleaning force and the dust cleaning effect of each part of the smoke dust filter bag area can be intuitively known, and the bag type filtering dust removal technology which is the mainstream technology in the industrial dust removal field and the pulse blowing dust cleaning mechanism thereof are favorably and deeply explored and researched.
3. The device is used for testing, monitoring and discriminating the blowing performance of various pulse valves, can accurately master the specifications and the number of filter bags adaptive to the various pulse valves, gives the optimal use conditions and the application occasions of the various pulse valves, provides scientific basis for configuration design of environmental protection engineering and development of new products of the pulse valves, and thereby effectively avoids economic loss caused by improper selection, and is beneficial to prolonging the service life of the filter bags, the dust remover and even the whole dust removal system.
Drawings
FIG. 1 is a schematic structural diagram of the whole front side of a bag-type dust removal pulse blowing performance testing and evaluating device according to an embodiment of the invention;
FIG. 2 is a side view of the structure of FIG. 1 in a side view;
FIG. 3 is a schematic partial cross-sectional view of FIG. 1;
FIG. 4 is an enlarged schematic view of a portion of FIG. 2;
FIG. 5 is a schematic view of the connection structure between the pulse blowing part and the compressed air supply part in FIG. 1;
FIG. 6 is a schematic view of the connection between the pulse valve and the regulated pressure air bag of FIG. 2;
FIG. 7 is a schematic view showing a connection structure of the blowing tube group of FIG. 3;
FIG. 8 is an enlarged schematic view of the first connection portion of FIG. 7;
FIG. 9 is an enlarged schematic view of the second connection portion of FIG. 7;
FIG. 10 is an enlarged schematic view of the third connection portion of FIG. 7;
fig. 11 is an enlarged schematic view of the fourth connection portion in fig. 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.
Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without inventive efforts shall fall within the scope of the present invention.
The terminology used herein is for the purpose of describing embodiments only and is not intended to be limiting and/or limiting of the invention.
For example, expressions such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "relative", "front-back-left-right" and the like indicate relative or absolute arrangements, and indicate not only such arrangements in a strict sense but also a state of being relatively displaced with a tolerance or an angle or a distance to the extent that the same function can be obtained.
As shown in fig. 1-2, the apparatus for testing and evaluating the pulse blowing performance of bag-type dust collection provided in this embodiment mainly comprises a host unit 10, a dust filter cloth, an air inducing unit 30, a dust supplying unit 40, a pulse blowing unit 50, an air compressing and supplying unit, a data processing unit and an automatic control unit, and is configured to set and control the working parameters of the corresponding parts by the automatic control unit, and mainly comprises an industrial personal computer and field instrumentation such as pressure, differential pressure, flow rate, temperature, atmospheric pressure, ambient temperature and humidity, fan current, voltage, shaft temperature, and rotation speed.
The main machine part 10 is mainly composed of an air purifying chamber 11, a dust and air chamber 12 and an ash storage chamber 13 which are sequentially arranged from top to bottom, an ash discharging unit 131 is conventionally arranged at the bottom of the ash storage chamber 13 to discharge ash, the whole outer part of the main machine part 10 is supported by a conventional supporting frame in a surrounding mode, and of course, a stair and other structures can be arranged to facilitate an operator to walk up and down.
The induced air part 30 is composed of an induced draft fan unit 31 and an air pipe unit 32, the induced draft fan unit 31 is mainly composed of a centrifugal fan, a variable frequency motor, a silencer and a variable frequency regulator, the induced draft fan unit 31 is used for providing wind power, the air pipe unit 32 is used for conveying the wind power, then the ventilation flow/load size of the test evaluation device is adjusted through the variable frequency regulator according to test requirements, and therefore various air distribution ratios/filtering speeds of the filter bag under different test load conditions are obtained.
The dust supply part 40 is used for automatically adjusting the dust amount and conveying the dust to the filter bag 21 by matching with the air inducing part 30, and comprises test dust, an automatic weighing supply device and a dust conveying pipe, wherein the dust conveying pipe is communicated with an air inlet at the bottom of the dust air chamber 12, the automatic weighing supply device is used for automatically supplying the test dust, and the dust amount at the inlet of the device is automatically adjusted according to the test requirements.
The dust filtering part is arranged in the main machine part 10 and mainly comprises a filter bag 21 and corresponding filter bag supporting cage bones, the filter bag 21 is used for filtering dust, the filter bag 21 is installed through a flower plate 14 arranged at the connecting position between a gas purifying chamber 11 and a dust and gas chamber 12, dust is blocked on the outer surface of the filter bag in the process that dust-containing airflow enters the inner surface of the filter bag from the outer surface of the filter bag arranged on the flower plate under the driving of a draught fan set, and clean gas is discharged to a bag opening through the inner surface of the filter bag.
The perforated plate 14 is longitudinally provided with two rows of holes, each row is 25 holes, the hole diameter of one row is phi 168mm, the hole diameter of the other row is phi 138mm, the perforated plate is correspondingly provided with 25 filter bags of two specifications, the bag diameters of which are phi 160mm and phi 130mm, which are most commonly adopted in domestic environment-friendly dust removal projects at present, and the length of each filter bag can be determined to be 9 meters.
Through the cooperation of the main machine part 10, the dust filtering part, the induced draft part 30 and the dust supply part 40, under the driving of the induced draft fan set, the dust-containing air flow is introduced from the air inlet at the bottom of the dust air chamber 12, and after being filtered by the filter bag, the clean air is discharged from the air outlet at the side part of the air purifying chamber 11, and the dust is discharged from the bottom of the dust storage chamber 13 through the dust discharge unit 131.
As shown in fig. 1 to 5, in detail, the pulse blowing part 50 is used in combination with the compressed air supply part, the pulse blowing part 50 is composed of a pressure-stabilizing air bag 51, a pulse valve 52 and a blowing pipe group 53, the pulse valve 52 is used for controlling whether the compressed air in the pressure-stabilizing air bag 51 is output or not, and the blowing pipe group 53 is used for conveying the compressed air from the pressure-stabilizing air bag 51.
25 nozzles are uniformly distributed on the blowing pipe group 53, the central axis of each nozzle is superposed with the central axis of the corresponding filter bag, and compressed air is rapidly sprayed into the corresponding filter bag through the nozzles.
The air compressing and supplying part comprises an air compressor 61, an air storage tank 62, an oil-water separator 63 and a pressure regulating valve 64, wherein the air storage tank 62 is communicated with the air compressor 61, the pressure regulating valve 64 is communicated with the pressure stabilizing air bag 51 to compress and store high-pressure compressed air, deoiling, dehydrating, drying and purifying treatment is carried out, and finally compressed air is supplied to the pulse valve to be detected according to the air supplying parameter requirements of the test such as pressure requirements, flow requirements and the like.
The data processing part mainly comprises a sensor module, a data acquisition module, a data processing module and a data display module, wherein the sensor module is arranged at the specified positions of the host part 10, the pressure-stabilizing air bag 51, the pulse valve 52, the injection pipe group 53 and the filter bag 21, and specifically, the sensor module comprises a pressure sensor, a differential pressure sensor 72, a temperature sensor, a humidity sensor, a dust concentration tester and an anemograph.
The flow, wind pressure, dust concentration, temperature and humidity measuring points are arranged at the pipe body position of the clean wind outlet 731 and the pipe body position of the dust wind inlet 732, and corresponding temperature sensors, humidity sensors, dust concentration measuring instruments and anemometers are arranged at the two positions.
The differential pressure sensor 72 is also provided at the pipe body position of the clean air outlet 731 and the pipe body position of the dust-laden air inlet 732, and the arrangement positions of the differential pressure sensor 72 at the pipe body position of the dust-laden air inlet 732 and the above-mentioned temperature sensor, humidity sensor, etc. may be unified.
The data acquisition module adopts a high-speed continuous sampling card to be matched with the data acquisition box for use.
The data processing module is a computer.
The data display module adopts a corresponding display structure.
The pressure difference sensor, the flow rate monitor and the dust concentration monitor are arranged at the air inlet and the air outlet of the host part 10, and are used for synchronously monitoring the inlet and the outlet differential pressure, the flow rate and the dust emission concentration of the host part 10 on line, and the pressure sensor is respectively arranged on the pressure stabilizing air bag 51, the pulse valve 52, the injection pipe group 53 and the filter bag 21.
The data acquisition part is used for acquiring relevant parameters of the host part 10, the pressure-stabilizing air bag 51, the pulse valve 52, the injection tube group 53 and detection points of the filter bag 21, analyzing and processing data through the data processing module and displaying graphs through the data display module.
Two pulse valve installation stations can be provided, and 2 can be used in total // 、2.5 // 、3 // 、3.5 // 、4 // 、4.5 // The tested pulse valves are submerged pulse valves with six types, wherein:
2 // 、2.5 // 、3 // the submerged pulse valve corresponds to a filter bag with the diameter phi of 130 mm;
3.5 // 、4 // 、4.5 // the submerged pulse valve corresponds to a filter bag with the diameter phi of 160 mm.
For convenience of distinguishing and understanding, the pressure sensors in different mounting areas are divided into a first pressure sensor 71a, a second pressure sensor 71b, a third pressure sensor 71c and a fourth pressure sensor 71d.
Then, pressure measuring points, namely two pressure sensors 71b are arranged at the jetting ports of all the pulse valves to be detected, and the pressure value at the jetting moment is synchronously monitored on line, so that the valve body resistance, namely the pressure loss, of all the pulse valves to be detected under different jetting pressures is determined.
And then, a pressure sensor 71a is arranged on the pressure-stabilizing air bag 51, the pressure-stabilizing air bag for the test is a combined type and is divided into a main body part and an auxiliary body part, the main body part and the auxiliary body part are connected through flanges, the pulse valve to be detected is installed on the auxiliary body, the air storage capacity of the combined type pressure-stabilizing air bag meets the requirement of the single maximum air injection quantity of the pulse valve with the maximum caliber, the pressure drop of the pressure-stabilizing air bag 51 during the injection is monitored online and synchronously, and the injection air quantity of the pulse valve 52 under different injection pressures is determined.
Then, 25 pressure sensors three 71c are provided at the mirror positions of the nozzles of the blowing pipe group 53, so as to monitor the pressure distribution of each nozzle 531 under different types of pulse valves 52 and different blowing pressures in an online and synchronous manner for all the nozzles 531, and thereby determine the number of the nozzles 531 of the blowing pipe group 53 and the number of the filter bags 21 corresponding to the same.
Then, pressure detection points are respectively arranged at the bottom of each filter bag 21, namely a pressure sensor four 71d is arranged, the pressure value of each bag bottom during pulse injection is synchronously monitored on line, so that the highest and lowest bag bottom pressure positions in the row of filter bags are determined, the number of the filter bags matched with the tested pulse valve is determined, and on the filter bags with the highest and lowest bag bottom pressures in each row, the pressure sensor four 71d is arranged, the pressure value of each detection point during pulse injection is synchronously monitored on line, so that the length of the filter bags matched with the tested pulse valve is determined, wherein the pressure values are arranged at intervals of one meter from the bag opening to the bag bottom, but the size is not limited.
As shown in fig. 6, in view of the fact that the number of pulse valve installation stations of the pulse blowing mechanism in the device is small, and in order to meet the test requirements of various types of pulse valves, the present embodiment further provides an installation module which is convenient to disassemble and assemble for connecting different types of pulse valves 52 and pressure stabilizing air bags 51, the installation module is mainly composed of a valve seat 100, a first coupling portion 200, a second coupling portion 300 and a connecting pipe body 400, the valve seat 100 is connected with the pulse valves 52, one end of the first coupling portion 200 is detachably connected with the valve seat 100, the other end of the first coupling portion is inserted into the top of the pressure stabilizing air bag 51, the second coupling portion 300 is inserted into the bottom of the pressure stabilizing air bag 51 and fixed by assembly welding, the connecting pipe body 400 sequentially passes through the valve seat 100, the first coupling portion 200, the pressure stabilizing air bag 51 and the second coupling portion 300, and the connecting pipe body 400 is controlled to be opened and closed by the pulse valves 52.
The valve seat 100 is formed by connecting an A flange 101, a B pipe 102 and a B flange 103 in sequence, and the three are welded and fixed.
The first connecting part 200 comprises a first connecting part 210 and a second connecting part 220, the first connecting part 210 is connected with the valve seat 100 by adopting a structure like a flange, the second connecting part 220 is of a pipe body structure, one end of the first connecting part 210 is detachably connected with the valve seat 100, the other end of the first connecting part 210 is connected with the second connecting part 220, and the first connecting part 200 is inserted into the top of the pressure-stabilizing air bag 51 and communicated with the pressure-stabilizing air bag 51 and is fixed by welding.
The second connecting part 300 comprises a third connecting part 310 and a fourth connecting part 320, one end of the third connecting part 310 is inserted into the bottom of the pressure-stabilizing air bag 51 and is fixed by welding, the other end of the third connecting part 310 is detachably connected with the fourth connecting part 320 by adopting a structure such as a flange, and the fourth connecting part 320 is attached to the outer wall of the connecting pipe body 400 and is fixed by welding.
The outlet of the connecting tube 400 is connected with the injection tube group 53, and the compressed air in the stable pressure air bag 51 can pass through the first connecting part 200 and the valve seat 100 in sequence and enter the connecting tube 400 when the pulse valve 52 is opened, then enter the injection tube group 53 and are injected into the corresponding filter bag 21 by the nozzle 531.
When the size of the connection tube 400 needs to be changed, the connection element three 310 and the connection element four 320 need to be removed, the connection tube 400 fixedly welded to the connection element four 320 is pulled out from the pressure stabilizing air bag 51, and then the pulse valve 52, the valve seat 100 and the connection tube 400 with the appropriate size need to be changed.
As shown in fig. 7-11, in view of the fact that the pulse blowing mechanism in the device has only two sets of blowing tube installation stations, but is not limited to two sets, and each set of length is greater than the conventional length, in order to meet the test detection requirements of various types of pulse valves to be detected, the embodiment further provides a quick connection structure of a blowing tube group, which mainly comprises blowing tubes 2, a first connection part 3, a second connection part 4 and a third connection part 5, wherein the blowing tube group is formed by splicing a plurality of blowing tubes 2, two adjacent blowing tubes 2 are detachably connected through the first connection part 3, one blowing tube 2 is detachably connected with the bottom surface 101 of the box body 1 through the second connection part 4, one blowing tube 2 is detachably connected with the top surface 102 of the box body 1 through the third connection part 5, and the box body 1 is equal to the air purification chamber 11.
The first connecting part 3 comprises a hoop body 301 and a first locking body 302, specifically, a quick connector is inserted into the end position of the blowing pipe body 2 at the position, the quick connectors of the two blowing pipe bodies 2 are in butt joint, a sealing ring structure can be inserted into the inner part of the hoop body 301 surrounding the whole body of the connecting position of the two blowing pipe bodies 2, and the first locking body 302 is used for locking the hoop body 301, namely, a clamping structure of the hoop body is adopted.
Of course, the two injection pipe bodies 2 may also be connected in an insertion manner, that is, a pipe sleeve is welded to one end of one injection pipe body 2, and the other injection pipe body 2 is inserted into the pipe sleeve to realize the butt connection of the two injection pipe bodies 2.
The second connecting portion 4 comprises a first connecting plate 401, a second connecting plate 402 and a second locking body 403, the first connecting plate 401 is connected with the bottom surface 101 through the second locking body 403, the first connecting plate 401 is connected with the second connecting plate 402 through the second locking body 403, the second connecting plate 402 is connected with the blowing tube body 2, and the second locking body 403 is formed by bolts.
The third connecting portion 5 comprises a third connecting plate 501 and a third locking body 502, the third connecting plate 501 is sleeved on the blowing pipe body 2, the third connecting plate 501 is connected with the top surface 102 through the third locking body 502, the third locking body 502 is of a bolt structure and is distributed on the periphery of the blowing pipe body 2 in an annular array mode, and the third connecting plate is connected and fixed with the box body 1.
Meanwhile, each blowing tube body 2 is connected with the inner wall of the box body 1 through a connection part four 6, the straightness of the blowing tube body 2 can be guaranteed, the connection part four 6 comprises a first substrate 601, a second substrate 602 and a third substrate 603, the first substrate 601 is connected with the inner wall of the box body 1, the second substrate 602 is detachably arranged on the first substrate 601, the third substrate 603 is in a mode of pressing the blowing tube body 2 to prevent impact and vibration caused by reverse acting force during blowing, the third substrate 603 can be arranged on the blowing tube body 2 in a surrounding or semi-surrounding mode and fixed with the second substrate 602, impact and vibration caused by the reverse acting force during blowing are prevented through the mode, the blowing tube body 2 is supported and strengthened, external force such as treading and the like can be prevented from bending the blowing tube body 2, a plurality of mounting hole positions can be formed in the first substrate 601 and the second substrate 602, the second substrate 602 can be fixed at different height positions of the first substrate 601 through screwing fasteners, the third substrate 603 can play a role in supporting the blowing tube body 2, namely the blowing tube body 2 can be supported only in an open mode, for example, a U-shaped blowing tube body supporting structure can be selected, and a circular hole structure can be penetrated in the three plate-shaped blowing tube body 603.
Based on the device, the test device adopts the pressure sensor, the gas flow sensor and the acceleration sensor and continuously samples by an industrial control computer under the condition of changing different blowing pressures, electric pulse time and filtering wind speed, and measures the following performance parameters of the detected pulse valves of various types in real time:
1. pulse valve jet outlet pressure peak value P max -MPa；
2. The rise rate dP/dt-KPa/ms of the pulse valve jet orifice pressure;
3. pressure drop delta P of pressure stabilizing air bag w -MPa；
4. Resistance delta P of pulse valve m -MPa；
5. Flow delta Q-m of blowing gas of pulse valve 3 Valve/time;
6. pulse valve on-off time (gas pulse time) t g -ms；
7. Bag position P with highest and lowest bag bottom pressure 1 ～P 25 -Mpa (but not limited to);
8. pressure distribution P in filter bag with highest and lowest bag bottom pressure a ～P h –Mpa。
And based on the method, an orthogonal test method is adopted to compare, discriminate and evaluate the performance of each type of pulse valve under various configuration conditions, so that the optimal valve configuration is optimized.
The corresponding test and evaluation method comprises the following steps:
in the first step, the pressure peak value P of the outlet of the pulse valve 52 is monitored on line max : the pressure sensor arranged at the outlet of the pulse valve 52 is used for on-line monitoring, and the background computer is used for processing the acquired data to give a pressure peak value P max And corresponding pressure peak curves and reports;
in the second step, the rise rate dP/dt of the pressure at the outlet of the pulse valve 52 is monitored on line: the method comprises the steps that data of pressure change in a blowing moment are monitored on line through a pressure sensor arranged at a blowing port of a pulse valve 52, collected data are processed through a background computer, and a pressure rising rate value dP/dt, a corresponding pressure change curve and a corresponding report are given;
step three, monitoring the pressure drop delta P of the pressure stabilizing air bag 51 on line w : on-line monitoring of the initial pressure value P of the surge tank 51 before blowing by the pulse valve 52 via a pressure sensor mounted on the surge tank 51 0 And the final pressure value P of the post-injection pressure-stabilizing air bag 51 1 And by means of a background counterThe computer processes the acquired data and gives out a pressure drop of the pressure stabilizing air bag 51 and a corresponding pressure change curve and a report;
in the fourth step, the resistance delta P of the pulse valve 52 is monitored on line m : initial pressure value P of pressure-stabilizing air bag 51 acquired on line 0 And the ejection port pressure peak P of the detected pulse valve 52 max Calculated difference Δ P = P between the two 0 －P max Obtaining and processing the acquired data through a background computer, and giving a resistance change curve and a report of the detected pulse valve 52;
and a fifth step of monitoring the flow quantity delta Q of the gas blown by the pulse valve 52 on line: by monitoring the time before and after the injection of the pulse valve 52 on line, the initial pressure P of the pressure-stabilizing air bag 51 is regulated 0 Value and end pressure P 1 The value, Δ Q, of the flow rate of the blowing gas of the pulse valve 52 is calculated by the following formula:
△Q＝P 0 Q/P atm [1－(P 1 /P 0 ) 1/K ]
in the formula: q is the volume m of the pressure stabilizing air bag 3 ，P atm Standard atmospheric pressure MPa and K as adiabatic index, and processing the acquired data through a background computer to give a flow value delta Q of the gas blown by the detected pulse valve 52 and a corresponding change curve and a report of the blowing flow;
in the sixth step, the on-off time t of the pulse valve 52 is monitored on line g : the time interval from the beginning of sensing the pressure to the disappearance of the pressure is monitored on line by a pressure sensor arranged at the outlet of the pulse valve 52, the collected data is processed by a background computer, and the opening and closing time value t of the pulse valve 52 is given g And corresponding time curves and reports;
and a seventh step of monitoring the highest and lowest bag bottom pressure on line: the pressure value of each bag bottom is monitored on line through a pressure sensor arranged at the bottom of each detected filter bag 21, the collected data is processed through a background computer, and the sequence of the bag bottom pressure from high to low and corresponding pressure curves and reports are given;
and eighth step, monitoring the pressure distribution in the filter bag 21 with the highest and the lowest bag bottom pressure on line: a plurality of pressure sensors are arranged on the filter bags 21 with the highest and lowest bag bottom pressures at intervals from the bag openings to the bag bottoms, the pressure distribution values in the bags are monitored on line, collected data are processed through a background computer, and an in-bag pressure distribution curve and a report are given.
Therefore, the invention provides a bag-type dust removal pulse blowing performance active and static test and evaluation device under the closed condition and the working condition flow field simulation condition and a corresponding detection, test and evaluation method. Through tests, the pulse injection mechanism is deeply explored, the advantages and the disadvantages of injection performance parameters of various pulse valves are discriminated, the ash removal strength and the effect of each part of a bag area are known, the specifications and the number of filter bags adaptive to the various pulse valves are mastered, the optimal use conditions and the application occasions of the various pulse valves are given, and therefore reliable basis is provided for environmental protection engineering design, selection of the pulse valves and development of new pulse valve products, the operation resistance of a bag type dust collector is reduced, and the service lives of the filter bags and the dust collector are prolonged.
The use of the terms "a" and "an" and "the" and similar referents in the context of describing the invention are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. All manner of description herein may be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the invention.
The present invention describes preferred embodiments, including the best mode known to the inventors for carrying out the invention. Of course, variations of these preferred embodiments will be apparent to those skilled in the art. The inventors envision that the variations may be used as appropriate by those skilled in the art and the inventors intend for the invention to be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications encompassed within the spirit and scope of the invention as defined by the claims. Moreover, any and all possible variations of the above-described elements are encompassed by the present invention unless otherwise indicated herein or otherwise clearly contradicted by context.
Description of the marks
The wind guide part 30
Draught fan set 31
Pressure stabilizing air bag 51
Blowing tube group 53
Oil-water separator 63
Pressure sensor one 71a
Pressure sensor two 71b
Pressure sensor III 71c
Pressure sensor four 71d
A flange 101
Coupling part one 200
Connecting piece I210
Connecting piece two 220
Two connecting parts 300
Connecting piece three 310
Connecting piece four 320
Connecting pipe body 400
Blowing pipe body 2
Connecting part I3
Locking body one 302
Connecting part two 4
Connecting plate I401
Connecting plate two 402
Locking body two 403
Connecting part III 5
Connecting plate III 501
Locking body III 502
Connecting part four 6
Substrate one 601
Substrate two 602
Substrate three 603.
Claims (10)
1. The utility model provides a bag type dust removal pulse jetting performance test and evaluation device which characterized in that includes:
the main machine part comprises a gas purifying chamber, a dust and gas chamber and an ash storage chamber which are arranged from top to bottom in sequence;
the dust filtering part is arranged in the main machine part and comprises a plurality of filter bags for filtering dust;
the induced draft part comprises an induced draft fan unit and an air pipe unit, the induced draft fan unit is used for providing wind power, and the air pipe unit is used for conveying the wind power;
the dust supply part is used for automatically adjusting the dust amount and conveying the dust to the filter bag by matching with the air inducing part;
the pulse injection part is arranged on the main machine part and communicated with the filter bag, the pulse injection part comprises a pressure-stabilizing air bag, a pulse valve and an injection pipe group, the pulse valve is used for controlling whether compressed air in the pressure-stabilizing air bag is output or not, and the injection pipe group is used for conveying the compressed air from the pressure-stabilizing air bag;
the air compression and supply part comprises an air compressor, and the air compressor is used for supplementing compressed air into the pressure stabilizing air bag;
the data processing part comprises a sensor module, a data acquisition module, a data processing module and a data display module, the data acquisition part is used for acquiring relevant parameters of the host part, the pressure stabilizing air bag, the pulse valve, the blowing pipe group and the detection point positions of the filter bags, and the data processing module is used for analyzing and processing data and displaying a chart through the data display module;
the dust-containing air flow is guided in from an air inlet at the bottom of the dust air chamber under the driving of the air guiding part, and is filtered by the filter bag, the purified air is discharged from an air outlet at the side part of the air purifying chamber, and the dust is discharged from the dust storage chamber.
2. The device for testing and evaluating the pulse blowing performance of dust collection bags according to claim 1, wherein the host machine further comprises a pattern plate, the pattern plate is arranged between the air purifying chamber and the dust and air chamber, a plurality of mounting holes are formed in the pattern plate, and one end of the filter bag is arranged on the pattern plate through the mounting holes.
3. The device for testing and evaluating the blowing performance of a dust collection pulse according to claim 2, wherein a plurality of the filter bags are vertically arranged in the dust chamber.
4. The device for testing and evaluating the blowing performance of a dust bag according to claim 3, wherein the dust supply portion comprises test dust, an automatic weighing supply device and a dust delivery pipe, the dust delivery pipe is communicated with the air inlet at the bottom of the dust chamber, and the automatic weighing supply device is used for automatically supplying the test dust.
5. The device for testing and evaluating the blowing performance of the bag type dust removal pulse according to claim 4, wherein the compressed air supply part further comprises an air storage tank, an oil-water separator and a pressure regulating valve which are sequentially communicated, the air storage tank is communicated with an air compressor, and the pressure regulating valve is communicated with a pressure stabilizing air bag.
6. The device for testing and evaluating the pulse blowing performance of the bag type dust removal device according to claim 5, wherein the sensor module comprises a pressure sensor, a differential pressure sensor, a temperature sensor, a humidity sensor, a dust concentration tester and an anemometer; the pressure sensor, the flow monitor and the dust concentration monitor are arranged at the air inlet and the air outlet of the host part and used for synchronously monitoring the inlet and outlet differential pressure, the flow and the dust emission concentration of the host part on line, and the pressure sensor is respectively arranged on the pressure stabilizing air bag, the pulse valve, the injection pipe group and the filter bag.
7. The device for testing and evaluating the pulse blowing performance of the bag type dust removal as claimed in claim 6, wherein the pressure-stabilizing gas bag is provided with at least one pressure sensor for on-line monitoring the pressure drop of the pressure-stabilizing gas bag during blowing and determining the blowing gas amount of the pulse valve under different blowing pressures;
the jetting ports of the pulse valves are provided with pressure sensors for online synchronous monitoring of pressure values at the moment of jetting and determining valve body resistance of each pulse valve under different jetting pressures;
the blowing pipe group is provided with a plurality of pressure sensors for synchronously monitoring the pressure distribution of the nozzles under different types of pulse valves and different blowing pressures on line and determining the number of the nozzles of the blowing pipe group and the number of the filter bags corresponding to the nozzles;
a plurality of pressure sensors are distributed on the filter bag at intervals and used for monitoring pressure values of corresponding positions.
8. The device for testing and evaluating the pulse blowing performance of the bag type dust collection according to claim 7, wherein a plurality of pressure sensors are arranged at intervals and uniformly from the bottom to the top of each filter bag, and are used for synchronously monitoring the pressure value of each measuring point during pulse blowing on line and determining the length of the filter bag matched with the pulse valve;
meanwhile, the pressure value of each bag bottom during pulse injection is synchronously monitored on line through the sensor positioned at the bottom of the filter bag, so that the highest and the lowest bag bottom pressure positions of the filter bags in the filter bag are determined, and the number of the filter bags adaptive to the pulse valves is determined.
9. A method for testing and evaluating a pulse blowing performance of a bag type dust collector, which is characterized in that the device for testing and evaluating a pulse blowing performance of a bag type dust collector according to any one of claims 1 to 7 is adopted, and the method for testing and evaluating comprises the following steps:
in the first step, the pressure peak value P of the spraying port of the pulse valve is monitored on line max : the pressure sensor arranged at the outlet of the pulse valve is used for on-line monitoring, and the background computer is used for processing the acquired data to give a pressure peak value P max And corresponding pressure peak curves and reports;
and in the second step, the rise rate dP/dt of the pressure at the outlet of the pulse valve is monitored on line: monitoring the data of pressure change in the blowing moment on line through a pressure sensor arranged at a jetting port of the pulse valve, processing the acquired data through a background computer, and giving a pressure rising rate value dP/dt, a corresponding pressure change curve and a report;
and step three, monitoring the pressure drop delta P of the pressure stabilizing air bag on line w : on-line monitoring of initial pressure value P of pressure-stabilizing air bag before blowing of pulse valve by pressure sensor mounted on pressure-stabilizing air bag 0 And the final pressure value P of the pressure-stabilizing air bag after blowing 1 Processing the acquired data through a background computer, and giving a pressure drop of the pressure stabilizing air bag, a corresponding pressure change curve and a report;
step four, monitoring the resistance delta P of the pulse valve on line m : initial pressure value P of pressure-stabilizing air bag acquired on line 0 And the pressure peak value P of the outlet of the pulse valve to be detected max Calculated difference Δ P = P between the two 0 －P max Obtaining and processing the acquired data through a background computer, and giving a resistance change curve and a report of the detected pulse valve;
and a fifth step of monitoring the flow quantity delta Q of the gas blown by the pulse valve on line:by monitoring the time before and after the pulse valve is injected, the initial pressure P of the pressure stabilizing air bag is monitored on line 0 Value and end pressure P 1 Processing the acquired data through a background computer, and giving out a flow value delta Q of the gas blown by the pulse valve to be detected and a corresponding blowing flow change curve and a report;
and a sixth step of monitoring the opening and closing time t of the pulse valve on line g : the time interval from the beginning of sensing the pressure to the disappearance of the pressure is monitored on line by a pressure sensor arranged at a jet port of the pulse valve, the collected data is processed by a background computer, and the opening and closing time value t of the pulse valve is given g And corresponding time curves and reports;
and a seventh step of monitoring the highest and lowest bag bottom pressure on line: the pressure value of each bag bottom is monitored on line through a pressure sensor arranged at the bottom of each detected filter bag, the collected data is processed through a background computer, and the sequence of the bag bottom pressure from high to low and a corresponding pressure curve and a report are given;
and eighth, monitoring the pressure distribution in the filter bag with the highest and the lowest bag bottom pressure on line: a plurality of pressure sensors are arranged on the filter bags with the highest and lowest bag bottom pressures at intervals from the bag openings to the bag bottoms, the pressure distribution values in the bags are monitored on line, collected data are processed through a background computer, and an in-bag pressure distribution curve and a report are given.
10. The method of claim 9, wherein the flow Δ Q of the pulse valve blowing gas is calculated by the following formula:
△Q＝P 0 Q/P atm [1－(P 1 /P 0 ) 1/K ]
in the formula: q is the volume of the pressure-stabilizing air bag, P atm Is standard atmospheric pressure and K is the adiabatic index.
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| CN117679854A (en) * | 2024-01-29 | 2024-03-12 | 昆山鹿城垃圾发电有限公司 | Flue gas purification device for household garbage incineration post-treatment |
| CN117679854B (en) * | 2024-01-29 | 2024-05-17 | 昆山鹿城垃圾发电有限公司 | Flue gas purification device for household garbage incineration post-treatment |
| CN118329433A (en) * | 2024-06-12 | 2024-07-12 | 张家港市胜港机械制造有限公司 | Multi-level testing method and system for pulse valve |
| CN118329433B (en) * | 2024-06-12 | 2024-09-10 | 张家港市胜港机械制造有限公司 | Multi-level testing method and system for pulse valve |
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