CN111450621B - Dynamic dust retention method and device based on double-layer barrier - Google Patents
Dynamic dust retention method and device based on double-layer barrier Download PDFInfo
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- CN111450621B CN111450621B CN202010271024.6A CN202010271024A CN111450621B CN 111450621 B CN111450621 B CN 111450621B CN 202010271024 A CN202010271024 A CN 202010271024A CN 111450621 B CN111450621 B CN 111450621B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F7/00—Devices affording protection against snow, sand drifts, side-wind effects, snowslides, avalanches or falling rocks; Anti-dazzle arrangements ; Sight-screens for roads, e.g. to mask accident site
- E01F7/02—Snow fences or similar devices, e.g. devices affording protection against sand drifts or side-wind effects
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F7/00—Devices affording protection against snow, sand drifts, side-wind effects, snowslides, avalanches or falling rocks; Anti-dazzle arrangements ; Sight-screens for roads, e.g. to mask accident site
- E01F7/02—Snow fences or similar devices, e.g. devices affording protection against sand drifts or side-wind effects
- E01F7/025—Devices specially adapted for protecting against wind, e.g. screens, deflectors or attenuators at tunnel or lock entrances
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N2015/0662—Comparing before/after passage through filter
Abstract
The invention discloses a dynamic dust retention method and a dynamic dust retention device based on a double-layer barrier, wherein the dynamic dust retention method judges whether the double-layer barrier is in an effective dust retention state or not by collecting the concentration of particles after the double-layer barrier blocks, and further controls the double-layer barrier to be in an optimal spacing position, so that the blocking rate of the double-layer barrier to the particles is the highest, when the double-layer barrier blocks effectively the particles within preset time, an abnormal information processing process is triggered, and if necessary, an alarm program is started; the dust retention device comprises a particulate matter acquisition module, a double-layer dust retention barrier module, an information processing module, a spacing adjustment module and a base module. According to the dust retention method and the dust retention device, the distance between the dust retention barriers is dynamically adjusted by acquiring the concentration of particles behind the barrier resistance of the double-layer barriers in real time, so that the optimal dust retention effect is achieved.
Description
Technical Field
The invention belongs to the technical field of windproof and dust suppression by adopting barriers in atmospheric environment protection, and particularly relates to a dynamic dust retention method and a dynamic dust retention device based on a double-layer barrier.
Background
With the continuous progress of the industrialization level, the living standard of people is gradually improved, and the environmental pollution problem also draws the wide attention of the nation and the society, wherein the atmospheric pollution problem is a current research hotspot due to the factors of large harmfulness, wide pollution range, easy diffusion, wide related industries and the like.
The existing wind-proof dust suppression device improves the wind-proof dust suppression efficiency mainly by optimizing the height, the length, the width, the opening size, the geometric shape, the porosity distribution and the like of the dust suppression barrier. Experiments show that: compared with the single-layer dust retention barrier of the same kind, the dust removal efficiency of the double-layer dust retention barrier with a proper distance can be improved by about 70% at most. Therefore, in an application scene requiring high dust removal rate, the windproof and dust retention efficiency is often improved by constructing a double-layer dust retention barrier, the two dust retention barriers with fixed relative positions are adopted in the existing double-layer dust retention barrier, however, according to the current actual measurement data, the particle blocking efficiency of the windproof and dust suppression barrier is greatly influenced by environmental factors, and due to the complexity of the practical application environment, the fixed multilayer dust retention barrier cannot be adjusted in distance, and the dust retention efficiency cannot achieve the optimal effect in practical application.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a dynamic dust retention method and a dust retention device based on a double-layer barrier, which realize the dynamic adjustment of the spacing between dust retention barriers to achieve the best dust retention effect, and the technical scheme of the invention is as follows by combining the attached drawings of the specification:
a dynamic dust retention method based on a double-layer barrier comprises the following specific processes:
s1: collecting the concentration of retarded particles of the double-layer dust-retention barrier, judging whether the concentration of retarded particles exceeds a preset maximum limit value of the concentration of retarded particles, and entering a second step if the concentration of retarded particles exceeds the preset maximum limit value of the concentration of retarded particles; if not, keeping the current relative position of the double-layer dust retention barrier, and circulating the step one;
s2: analyzing and obtaining the optimal distance between the double-layer dust retention barriers in the current environment so as to maximize the blocking rate of the double-layer dust retention barriers to the particles;
s3: controlling the distance between the double layers of dust retention barriers to reach the optimal distance;
s4: collecting the concentration of retarded particles of the double-layer dust-retention barrier at the optimal spacing position again, judging whether the concentration of the retarded particles exceeds the highest limit value of the concentration of the retarded particles again, if not, keeping the current relative position of the double-layer dust-retention barrier, and returning to the step one; and if so, triggering an abnormal information processing process.
Further, in step S2, the process of obtaining the optimal distance is as follows:
s201: controlling the double-layer dust retention screen to move the same distance relatively in unit time until the double-layer dust retention screen moves to the maximum distance from zero distance, and acquiring the concentration C of the blocking particles before the blocking of the double-layer dust retention screen at the corresponding distance position in real timefnAnd the concentration C of retarding particles after the double-layer dust-retaining barrierrn；
S202: calculating the blocking rate P of the double-layer dust retention barrier at different spacing positionsn：
Pn＝(Cfn-Crn)/Cfn
S203: the calculated blocking rate P of the double-layer dust retention barrier at a group of different spacing positionsnIn the method, the maximum retardation rate P is selectedmaxSaid maximum retardation rate PmaxThe distance between the corresponding double layers of dust holding barriers is the optimal distance.
Further, the trigger exception information processing process is as follows:
s401: continuously collecting the retarded concentration of the particles of the double-layer dust-retention screen at the optimal spacing position within the preset interval readjustment time of the barrier, judging whether the retarded concentration of the particles of the double-layer dust-retention screen exceeds the maximum limit value of the retarded concentration of the particles, and entering a step S402 if the retarded concentration of the particles of the double-layer dust-retention screen falls below the maximum limit value of the retarded concentration of the particles of the double-layer dust-retention screen; if the maximum limit value of the concentration of the retarded particles is still exceeded, the operation goes to step S403;
s402: recording an initial time point triggering an abnormal information processing process, namely an abnormal initial time point, and a time point when the concentration of the retarded particulate matters after the barrier of the double-layer dust-retaining barrier is firstly reduced to be below a maximum limit value of the concentration of the retarded particulate matters, namely a normal recovery time point, and acquiring the concentration of the retarded particulate matters before the retardation of the double-layer dust-retaining barrier and the concentration of the retarded particulate matters after the barrier of the double-layer dust-retaining barrier in a time period from the abnormal initial time point to the normal recovery time point in real time to generate and store an abnormal report;
s403: and returning to execute the step S2, recording a starting time point for triggering the exception information processing process, namely the time point of exception starting, and returning to execute the step S2, namely the time point of exception ending, and acquiring the concentration of the retarded particles before the retardation of the double-layer dust-retention barrier and the concentration of the retarded particles after the retardation of the double-layer dust-retention barrier in the time period between the time points of exception ending at the time point of exception starting in real time, generating an exception report and storing the report, and meanwhile, starting an alarm program.
A dust retention device for realizing the dynamic dust retention method based on the double-layer barrier comprises a particulate matter acquisition module 1, a double-layer dust retention barrier module 2, an information processing module 3, a spacing adjustment module 4 and a base module 5;
the distance adjusting module 4 consists of two groups of linear stepping motors which are arranged in parallel;
the base module 5 consists of connecting blocks 51 arranged at two ends of the motor guide rail 42 and a connecting beam 52 for connecting the two connecting blocks 51 at the same end;
the front dust holding barrier 21 of the double-layer dust holding barrier module 2 is fixed on a connecting block 51 at the front end of the motor guide rail 42, and the rear dust holding barrier 22 is fixed on a motor sliding block 41 on the motor guide rail 42;
the particle collection module 1 consists of a front particle concentration sensor 11 arranged on the front side of the double-layer dust-holding barrier module 2 and a rear particle concentration sensor 12 arranged on the rear side of the double-layer dust-holding barrier module 2;
the information processing module 3 consists of a singlechip 31, a memory 32 and an alarm 33;
the single chip microcomputer 31 is used for receiving concentration signals collected by the front particulate matter concentration sensor 11 and the rear particulate matter concentration sensor 12, on one hand, controls a linear stepping motor in the distance adjusting module 4 to move, drives the rear dust retention barrier 22 to move through the motor slider 41, further adjusts the distance between the front dust retention barrier 21 and the rear dust retention barrier 22, on the other hand, generates an abnormal report and sends the abnormal report to the memory 32 for storage, and controls the alarm 33 to give an alarm.
Furthermore, the front dust-retention barrier 21 is inserted in the connecting block 51 and fixed by screws;
the rear dust retention barrier 22 is inserted into the motor slider 41 and fixed by screws.
Further, the vertical distance from the front surface of the front dust barrier 21 to the front surface of the front dust barrier 21 in the horizontal direction by the front particulate matter concentration sensor 11 is one tenth of the height of the front dust barrier 21, and the vertical distance from the front particulate matter concentration sensor 11 to the horizontal plane where the bottom edge of the front dust barrier 21 is located in the vertical direction is three quarters of the height of the front dust barrier 21;
the vertical distance of the rear particle concentration sensor 12 from the rear barrier surface of the rear dust holding barrier 22 in the horizontal direction is one tenth of the height of the rear dust holding barrier 22, and the vertical distance of the rear particle concentration sensor 12 from the horizontal plane of the bottom edge of the rear dust holding barrier 22 in the vertical direction is three quarters of the height of the rear dust holding barrier 22.
Further, the information processing module 3 composed of the single chip microcomputer 31, the memory 32 and the alarm 33 is arranged in a dust-proof box 53 arranged on a connecting beam 52 at the rear end of the motor guide rail 42.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the dynamic dust retention method based on the double-layer barrier, the blocking rate of the double barriers to particles is enabled to reach the optimum value under the current environment state by adjusting the distance between the front barrier and the rear barrier, and the distance between the double barriers is adjusted in real time according to the change of the concentration of the particles in the environment, so that the dust retention efficiency is improved by 40% -80% compared with that of a single-layer dust retention barrier of the same type.
2. The dynamic dust retention method based on the double-layer barrier adjusts the interval time of particulate matter collection in the environment according to actual requirements to adapt to changeable application conditions, so that a more optimized dust reduction effect can be obtained at any time.
3. The dynamic dust retention method based on the double-layer barrier can adjust the dust retention strategy aiming at one of the collected particles with various particle sizes according to the actual requirement so as to maximize the interception rate of one particle size and comprehensively control the interception rates of the particles with various particle sizes.
4. The dynamic dust retention method based on the double-layer barrier can record the time period when the dust retention barrier cannot generate expected effect and the environmental condition thereof, and generate an alarm signal to remind a user of replacing the barrier with higher dust retention efficiency, or further analyze the reason why the expected dust retention effect cannot be achieved.
5. The dynamic dust retention device based on the double-layer barrier realizes dynamic adjustment of the distance between the front dust retention barrier and the rear dust retention barrier through the linear stepping motor, the relative motion of the dust retention barriers is stable, and the position adjustment is quick and accurate.
6. The dynamic dust retention device based on the double-layer barrier respectively detects the concentrations of particles before dust retention and after dust retention through the particle concentration sensors arranged on the outer sides of the front and rear dust retention barriers, and sends the concentrations to the single chip microcomputer to calculate and obtain the dust retention rate, the single chip microcomputer selects the optimal position according to the dust retention rates corresponding to the front and rear dust retention barriers at different intervals, and then the linear stepping motor is driven to drive the dust retention barriers to be located at the optimal position, and the control process is clear in logic, simple and reliable.
7. In the dynamic dust retention device based on the double-layer barrier, the dust retention barrier is fixed on the mounting frame in a clamping and mounting mode, so that the dust retention barrier is convenient to disassemble and assemble, and the dust retention barrier is convenient to replace.
8. In the dynamic dust retention device based on the double-layer barrier, the adopted particulate matter concentration sensor can realize the collection of particulate matters with different particle sizes.
9. The dynamic dust retention device based on the double-layer barrier is provided with the alarm, so that the alarm is given when abnormal information occurs in the device.
Drawings
FIG. 1 is a flow chart of a dynamic dust retention method based on a double-layer barrier according to the present invention;
FIG. 2 is a schematic structural diagram of a dynamic dust retention device based on a double-layer barrier according to the present invention;
FIG. 3 is a schematic perspective view of a dynamic dust retention device based on a double-layer barrier according to the present invention;
FIG. 4 is a schematic structural diagram of an information processing module in the dynamic dust retention device based on a double-layer barrier according to the present invention;
FIG. 5 is a schematic block diagram of signal flow in the dynamic dust retention device based on the double-layer barrier according to the present invention;
in the figure:
1-a particulate matter acquisition module, 2-a double-layer dust retention barrier module, 3-an information processing module, 4-a spacing adjustment module,
5-a base module;
11-front particulate matter concentration sensor, 12-rear particulate matter concentration sensor;
21-front dust retention barrier, 22-rear dust retention barrier;
31-a single chip microcomputer, 32-a memory and 33-an alarm;
41-motor slide block, 42-motor slide rail;
51-connecting block, 52-connecting beam and 53-dustproof box.
Detailed Description
For clearly and completely describing the technical scheme and the specific working process thereof, the specific implementation mode of the invention is as follows by combining the attached drawings of the specification:
the invention discloses a dynamic dust retention method based on a double-layer barrier, which is characterized in that before a specific dust retention process is carried out, the 'blocked particulate matters' and the highest limiting value C of the concentration of the blocked particulate matters are required to be setmax"and" barrier pitch reset time t ";
the retarding particles are one or more particles or mixed particles which need to be retarded in the current environment, and the retarding particles are selected in advance;
the maximum limit value of the concentration of the retarded particles is as follows: the maximum limit value of the concentration of retarded particles (i.e. the maximum limit value of the concentration of one particle or a plurality of mixed particles to be retarded) in the current circumstances, said maximum limit value of the concentration of retarded particles CmaxIs a preset value;
the barrier spacing readjustment time is the time interval from the next readjustment of the spacing between the double-layer barriers when the concentration of the particles after the double-layer barriers at the optimal spacing still exceeds the highest limit value of the concentration of the retarded particles, so that the concentration of the particles after the double-layer barriers falls below the highest limit value of the concentration of the retarded particles within the barrier spacing readjustment time, and the barrier spacing readjustment time t is a preset value;
as shown in fig. 1, the dynamic dust retention process is as follows:
s1: collecting concentration C of retarding particles after double-layer dust-retention barrierrAnd judging whether it exceeds the maximum limit value C of the concentration of the retarded particlesmaxIf yes, entering the step two; if not, keeping the current relative position of the double-layer dust retention barrier, and circulating the step one;
s2: analyzing and obtaining the optimal distance between the double-layer dust retention barriers in the current environment;
the optimal distance obtaining process is as follows:
s201: controlling the double-layer dust retention screen to move the same distance relatively in unit time until the double-layer dust retention screen moves to the maximum distance from zero distance, and acquiring the concentration C of the blocking particles before the blocking of the double-layer dust retention screen at the corresponding distance position in real timefnAnd the concentration C of retarding particles after the double-layer dust-retaining barrierrn；
S202: calculating the blocking rate P of the double-layer dust retention barrier at different spacing positionsn：
Pn＝(Cfn-Crn)/Cfn
S203: the calculated blocking rate P of the double-layer dust retention barrier at a group of different spacing positionsnIn the method, the maximum retardation rate P is selectedmaxSaid maximum retardation rate PmaxThe distance between the corresponding double layers of dust holding barriers is the optimal distance;
s3: controlling the distance between the double layers of dust retention barriers to reach the optimal distance;
s4: the concentration C of retarded particles of the double-layer dust-retention barrier at the optimal spacing position is collected againr', and thenJudging whether the concentration of the particles exceeds the maximum limit value C of the concentration of the particlesmaxIf the current relative position of the double-layer dust retention barrier is not exceeded, the double-layer dust retention barrier keeps the current relative position, and the step I is returned; if yes, triggering an abnormal information processing process;
the trigger exception information processing process comprises the following steps:
s401: continuously collecting the retarded concentration of the particles of the double-layer dust retention screen at the optimal spacing position within the readjustment time t of the spacing between the barriers, and judging whether the retarded concentration of the particles of the double-layer dust retention screen exceeds the highest limit value C of the retarded concentration of the particles of the double-layer dust retention screenmaxIf the concentration of the particles is reduced to the maximum limit value CmaxThereafter, the process proceeds to step S402; if the maximum limit value C of the concentration of the retarded particles is still exceededmaxThen, go to step S403;
s402: recording an initial time point triggering an abnormal information processing process, namely an abnormal initial time point, and a time point when the concentration of the retarded particulate matters after the barrier of the double-layer dust-retaining barrier is firstly reduced to be below a maximum limit value of the concentration of the retarded particulate matters, namely a normal recovery time point, and acquiring the concentration of the retarded particulate matters before the retardation of the double-layer dust-retaining barrier and the concentration of the retarded particulate matters after the barrier of the double-layer dust-retaining barrier in a time period from the abnormal initial time point to the normal recovery time point in real time to generate and store an abnormal report;
s403: and returning to execute the step S2, recording a starting time point for triggering the exception information processing process, namely the time point of exception starting, and returning to execute the step S2, namely the time point of exception ending, and acquiring the concentration of the retarded particles before the retardation of the double-layer dust-retention barrier and the concentration of the retarded particles after the retardation of the double-layer dust-retention barrier in the time period between the time points of exception ending at the time point of exception starting in real time, generating an exception report and storing the report, and meanwhile, starting an alarm program.
According to the dynamic dust retention method based on the double-layer barrier, the invention also discloses a dynamic dust retention device based on the double-layer barrier, and as shown in fig. 3, the dynamic dust retention device comprises a particulate matter acquisition module 1, a double-layer dust retention barrier module 2, an information processing module 3, a spacing adjustment module 4 and a base module 5. Wherein:
the distance adjusting module 4 is composed of two groups of linear stepping motors, motor slide rails 42 of the two groups of linear stepping motors are arranged in parallel, motor slide blocks 41 of the two groups of linear stepping motors are connected to the corresponding motor slide rails 42 in a sliding manner, and the motor slide blocks 41 move synchronously on the corresponding motor slide rails 42;
the base module 5 has two sets ofly, sets up both ends around two sets of linear stepping motor's motor slide rail 42 respectively, and every base module 5 of group comprises two connecting blocks 51 and a tie-beam 52 respectively, connecting block 51 fixed mounting is at the motor slide rail 42 tip that corresponds, and tie-beam 52 both ends and the connecting block 51 fixed connection that corresponds to the realization is connected connecting block 51, tie-beam 52 and motor slide rail 42 as an organic whole.
The double-layer dust retention barrier module 2 is formed by mutually overlapping a front dust retention barrier 21 and a rear dust retention barrier 22 which are vertically arranged; the front dust barrier 21 is arranged at the front ends of the two motor slide rails 42 of the distance adjusting module 4, slots are formed in the two connecting blocks 51 corresponding to the front ends of the two motor slide rails 42, the lower end of the front dust barrier 21 is inserted into the corresponding slot of the connecting block 51 and is fixedly connected with the connecting block 51 through a screw, so that the front dust barrier 21 is fixed at the end parts of the two motor slide rails 42; the rear dust-retention barrier 22 is arranged on two motor slide rails 42 of the distance adjusting module 4, slots are formed in motor slide blocks 41 on the two motor slide rails 42, the lower end of the rear dust-retention barrier 22 is inserted into the corresponding slot of the motor slide block 41 and is fixedly connected with the motor slide block 41 through screws, and the motor slide block 41 drives the rear dust-retention barrier 22 to linearly move along the motor slide rails 42 according to unit step length under the driving of a linear stepping motor of the distance adjusting module 4, so that the distance between the front dust-retention barrier 21 and the position of the front dust-retention barrier are relatively fixed.
The particle collection module 1 consists of a front particle concentration sensor 11 and a rear particle concentration sensor 12; the front particulate matter concentration sensor 11 is fixedly arranged on the front side of the front dust-holding barrier 21 through a bracket and is used for collecting the concentration of particulate matters before blocking of a double-layer dust-holding barrier consisting of the front dust-holding barrier 21 and a rear dust-holding barrier 22, the vertical distance from the front particulate matter concentration sensor 11 to the front barrier surface of the front dust-holding barrier 21 in the horizontal direction is one tenth of the height of the front dust-holding barrier 21, and the vertical distance from the front particulate matter concentration sensor 11 to the horizontal plane where the bottom edge of the front dust-holding barrier 21 is located in the vertical direction is three quarters of the height of the front dust-holding barrier 21; the rear particulate matter concentration sensor 12 is fixedly arranged on the rear side of the rear dust retention barrier 22 through a bracket and is used for collecting the concentration of particulate matters after the resistance of the double-layer dust retention barrier consisting of the front dust retention barrier 21 and the rear dust retention barrier 22, the vertical distance from the rear particulate matter concentration sensor 12 to the surface of the rear dust retention barrier 22 in the horizontal direction is one tenth of the height of the rear dust retention barrier 22, and the vertical distance from the rear particulate matter concentration sensor 12 to the horizontal plane where the bottom edge of the rear dust retention barrier 22 is located in the vertical direction is three quarters of the height of the rear dust retention barrier 22; the front particulate matter concentration sensor 11 and the rear particulate matter concentration sensor 12 can realize the collection of the concentration of particulate matters with one particle size or mixed particulate matters with multiple particle sizes.
As shown in fig. 2, 4 and 5, the information processing module 3 is composed of a single chip microcomputer 31, a memory 32 and an alarm 33. The signal receiving end of the single chip microcomputer 31 is respectively connected with the signal output ends of the front particulate matter concentration sensor 11 and the rear particulate matter concentration sensor 12, and the front particulate matter concentration sensor 11 and the rear particulate matter concentration sensor 12 send collected particulate matter concentration signal data to the single chip microcomputer 31 for further analysis and processing of the single chip microcomputer 31; the single chip microcomputer 31 has three signal output ends, wherein: a first signal output end of the single chip microcomputer 31 is in signal connection with a control signal receiving end of a linear stepping motor in the distance adjusting module 4, and the single chip microcomputer 31 sends a control signal to the linear stepping motor so as to control a motor sliding block 41 of the linear stepping motor to linearly move along a corresponding motor guide rail 42 according to a certain step length and control the motor sliding block 41 to move to a specified position on the motor guide rail 42; the second signal output end of the single chip microcomputer 31 is in signal connection with the memory, and when the single chip microcomputer 31 generates an exception report, the exception report is sent to the memory 32 to be stored; the third signal output end of the single chip microcomputer 31 is in signal connection with the control signal receiving end of the alarm 33, and the single chip microcomputer 31 sends a control signal to the alarm 33 to control the alarm 33 to give an alarm.
As shown in fig. 3, the information processing module 3 composed of the single chip microcomputer 31, the memory 32 and the alarm 33 is arranged in a dust-proof box 53 mounted on a connecting beam 52 at the rear end of the motor guide rail 42.
The process of the dynamic dust holding method implemented by the dynamic dust holding device is as follows:
s1: the rear particulate matter concentration sensor 12 collects the retarded particulate matter concentration of the double-layer dust-retaining barrier module 2 and sends the retarded particulate matter concentration to the single chip microcomputer 31, the single chip microcomputer 31 judges whether the retarded particulate matter concentration exceeds the highest limit value of the retarded particulate matter concentration according to a built-in logic program, and if the retarded particulate matter concentration exceeds the highest limit value of the retarded particulate matter concentration, the step II is carried out; if not, keeping the current relative position between the front dust holding barrier 21 and the rear dust holding barrier 22, and circulating the step I;
s2: analyzing and obtaining the optimal distance between the front dust holding barrier 21 and the rear dust holding barrier 22 under the current environment;
the optimal distance obtaining process is as follows:
s201: the single chip microcomputer 31 controls a motor slide block 41 of the linear stepping motor to drive the rear dust retention barrier 22 to move relative to the front dust retention barrier 21 according to a certain step length until the double-layer dust retention barrier moves from zero distance to the maximum stroke of a motor slide rail 42, and the concentration C of the retarded particles before the retardation of the double-layer dust retention barrier module 2 corresponding to the distance position is acquired in real time through the front particle concentration sensor 11 and the rear particle concentration sensor 12fnAnd the retarding particulate matter concentration C after the double-layer dust-retention barrier module 2 retardsrn；
S202: in the singlechip 31, calculating the retardation rate P of the double-layer dust-retention barrier module 2 at different spacing positionsn：
Pn＝(Cfn-Crn)/Cfn
S203: the calculated blocking rate P of the double-layer dust retention barrier module 2 at a set of different spacing positionsnIn the method, the maximum retardation rate P is selectedmaxSaid maximum retardation rate PmaxThe distance between the corresponding front dust holding barrier 21 and the corresponding rear dust holding barrier 22 is the optimal distance;
s3: the single chip microcomputer 31 controls a motor slide block 41 of the linear stepping motor to drive the rear dust barrier 22 to move, so that the distance between the rear dust barrier 22 and the front dust barrier 11 is the optimal distance;
s4: the rear particulate matter concentration sensor 12 collects the retarded concentration of the blocked particulate matter of the double-layer dust-retention barrier module 2 at the optimal spacing position again, judges whether the retarded concentration of the particulate matter exceeds the highest limit value of the retarded concentration of the particulate matter again, if the retarded concentration of the particulate matter does not exceed the highest limit value of the retarded concentration of the particulate matter, the front dust-retention barrier 21 and the rear dust-retention barrier 22 keep the current relative position, and returns to the first step; if yes, triggering an abnormal information processing process;
the trigger exception information processing process comprises the following steps:
s401: within preset barrier interval readjustment time t in the single chip microcomputer 31, the rear particulate matter concentration sensor 12 continuously acquires retarded particulate matter concentration of the double-layer dust-retaining barrier module 2 at the optimal interval position, judges whether the retarded particulate matter concentration exceeds a maximum retarded particulate matter concentration limit value or not, and enters step S402 if the retarded particulate matter concentration falls below the maximum retarded particulate matter concentration limit value; if the maximum limit value of the concentration of the retarded particles is still exceeded, the operation goes to step S403;
s402: the single chip microcomputer 31 records an initial time point of triggering an abnormal information processing process, namely an abnormal initial time point, and a time point when the concentration of the retarded particulate matters after the double-layer dust-retention barrier resistance is firstly reduced to be below a maximum limit value of the concentration of the retarded particulate matters, namely a normal recovery time point, the front particulate matter concentration sensor 11 and the rear particulate matter concentration sensor 12 collect the concentration of the retarded particulate matters before the double-layer dust-retention barrier module 2 retards and the concentration of the retarded particulate matters after the double-layer dust-retention barrier module 2 in real time in a time period from the abnormal initial time point to the normal recovery time point, and an abnormal report is generated in the single chip microcomputer 31 and sent to the memory 32 for storage;
s403: returning to execute the step S2, the single chip microcomputer 31 records a start time point of triggering the process of processing the abnormal information, that is, a time point of the abnormal start, and a time point of returning to execute the step S2, that is, a time point of the abnormal end, in a time period between the time points of the abnormal start and the abnormal end acquired by the front particulate matter concentration sensor 11 and the rear particulate matter concentration sensor 12 in real time, the concentration of the blocking particulate matter before the blocking of the double-layer dust-holding barrier module 2 and the concentration of the blocking particulate matter after the blocking of the double-layer dust-holding barrier module 2 generate an abnormal report in the single chip microcomputer 31 and send the abnormal report to the memory 32 for storage, and at the same time, the single chip microcomputer 31 controls the alarm.
Claims (6)
1. A dynamic dust retention method based on a double-layer barrier is characterized in that:
the dust retention method comprises the following specific processes:
s1: collecting the concentration of retarded particles of the double-layer dust-retention barrier, judging whether the concentration of retarded particles exceeds a preset maximum limit value of the concentration of retarded particles, and entering a second step if the concentration of retarded particles exceeds the preset maximum limit value of the concentration of retarded particles; if not, keeping the current relative position of the double-layer dust retention barrier, and circulating the step one;
s2: analyzing and obtaining the optimal distance between the double-layer dust retention barriers in the current environment so as to maximize the blocking rate of the double-layer dust retention barriers to the particles;
the optimal distance obtaining process is as follows:
s201: controlling the double-layer dust retention screen to move the same distance relatively in unit time until the double-layer dust retention screen moves to the maximum distance from zero distance, and acquiring the concentration C of the blocking particles before the blocking of the double-layer dust retention screen at the corresponding distance position in real timefnAnd the concentration C of retarding particles after the double-layer dust-retaining barrierrn；
S202: calculating the blocking rate P of the double-layer dust retention barrier at different spacing positionsn：
Pn＝(Cfn-Crn)/Cfn
S203: the calculated blocking rate P of the double-layer dust retention barrier at a group of different spacing positionsnIn the method, the maximum retardation rate P is selectedmaxSaid maximum retardation rate PmaxThe distance between the corresponding double layers of dust holding barriers is the optimal distance;
s3: controlling the distance between the double layers of dust retention barriers to reach the optimal distance;
s4: collecting the concentration of retarded particles of the double-layer dust-retention barrier at the optimal spacing position again, judging whether the concentration of the retarded particles exceeds the highest limit value of the concentration of the retarded particles again, if not, keeping the current relative position of the double-layer dust-retention barrier, and returning to the step one; and if so, triggering an abnormal information processing process.
2. The dynamic dust retention method based on the double-layer barrier as claimed in claim 1, characterized in that:
the trigger exception information processing process comprises the following steps:
s401: continuously collecting the retarded concentration of the particles of the double-layer dust-retention screen at the optimal spacing position within the preset interval readjustment time of the barrier, judging whether the retarded concentration of the particles of the double-layer dust-retention screen exceeds the maximum limit value of the retarded concentration of the particles, and entering a step S402 if the retarded concentration of the particles of the double-layer dust-retention screen falls below the maximum limit value of the retarded concentration of the particles of the double-layer dust-retention screen; if the maximum limit value of the concentration of the retarded particles is still exceeded, the operation goes to step S403;
s402: recording an initial time point triggering an abnormal information processing process, namely an abnormal initial time point, and a time point when the concentration of the retarded particulate matters after the barrier of the double-layer dust-retaining barrier is firstly reduced to be below a maximum limit value of the concentration of the retarded particulate matters, namely a normal recovery time point, and acquiring the concentration of the retarded particulate matters before the retardation of the double-layer dust-retaining barrier and the concentration of the retarded particulate matters after the barrier of the double-layer dust-retaining barrier in a time period from the abnormal initial time point to the normal recovery time point in real time to generate and store an abnormal report;
s403: and returning to execute the step S2, recording a starting time point for triggering the exception information processing process, namely the time point of exception starting, and returning to execute the step S2, namely the time point of exception ending, and acquiring the concentration of the retarded particles before the retardation of the double-layer dust-retention barrier and the concentration of the retarded particles after the retardation of the double-layer dust-retention barrier in the time period between the time points of exception ending at the time point of exception starting in real time, generating an exception report and storing the report, and meanwhile, starting an alarm program.
3. A dust retention device for implementing the double-barrier-based dynamic dust retention method according to claim 1, wherein:
the dynamic dust retention device comprises a particulate matter collecting module (1), a double-layer dust retention barrier module (2), an information processing module (3), a spacing adjusting module (4) and a base module (5);
the distance adjusting module (4) consists of two groups of linear stepping motors which are arranged in parallel;
the base module (5) consists of connecting blocks (51) arranged at two ends of a motor guide rail (42) and a connecting beam (52) for connecting the two connecting blocks (51) positioned at the same end;
the front dust retention barrier (21) of the double-layer dust retention barrier module (2) is fixed on a connecting block (51) at the front end of the motor guide rail (42), and the rear dust retention barrier (22) is fixed on a motor sliding block (41) on the motor guide rail (42);
the particle collection module (1) consists of a front particle concentration sensor (11) arranged on the front side of the double-layer dust-retention barrier module (2) and a rear particle concentration sensor (12) arranged on the rear side of the double-layer dust-retention barrier module (2);
the information processing module (3) consists of a singlechip (31), a memory (32) and an alarm (33);
the single chip microcomputer (31) is used for receiving concentration signals collected by the front particulate matter concentration sensor (11) and the rear particulate matter concentration sensor (12), on one hand, a linear stepping motor in the distance adjusting module (4) is controlled to move, the rear dust retention barrier (22) is driven to move through the motor sliding block (41), then the distance between the front dust retention barrier (21) and the rear dust retention barrier (22) is adjusted, on the other hand, an abnormal report is generated and sent to the storage (32) to be stored, and the alarm (33) is controlled to give an alarm.
4. The dust holding device for realizing the dynamic dust holding method based on the double-layer barrier is characterized in that:
the front dust retention barrier (21) is inserted in the connecting block (51) and fixed by a screw;
the rear dust retention barrier (22) is inserted on the motor slide block (41) and fixed through screws.
5. The dust holding device for realizing the dynamic dust holding method based on the double-layer barrier is characterized in that:
the vertical distance between the front particle concentration sensor (11) and the front barrier surface of the front dust holding barrier (21) in the horizontal direction is one tenth of the height of the front dust holding barrier (21), and the vertical distance between the front particle concentration sensor (11) and the horizontal plane where the bottom edge of the front dust holding barrier (21) is located in the vertical direction is three fourths of the height of the front dust holding barrier (21);
the vertical distance between the rear particle concentration sensor (12) and the surface of the rear screen of the rear dust retention screen (22) in the horizontal direction is one tenth of the height of the rear dust retention screen (22), and the vertical distance between the rear particle concentration sensor (12) and the horizontal plane where the bottom edge of the rear dust retention screen (22) is located in the vertical direction is three quarters of the height of the rear dust retention screen (22).
6. The dust holding device for realizing the dynamic dust holding method based on the double-layer barrier is characterized in that:
and an information processing module (3) consisting of the singlechip (31), the memory (32) and the alarm (33) is arranged in a dustproof box (53) arranged on a connecting beam (52) at the rear end of the motor guide rail (42).
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