CN114751200A - Powder pneumatic conveying control method - Google Patents
Powder pneumatic conveying control method Download PDFInfo
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- CN114751200A CN114751200A CN202210367320.5A CN202210367320A CN114751200A CN 114751200 A CN114751200 A CN 114751200A CN 202210367320 A CN202210367320 A CN 202210367320A CN 114751200 A CN114751200 A CN 114751200A
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- 239000000843 powder Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000428 dust Substances 0.000 claims abstract description 114
- 238000012423 maintenance Methods 0.000 claims abstract description 33
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 238000012544 monitoring process Methods 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims description 35
- 238000003860 storage Methods 0.000 claims description 29
- 238000001514 detection method Methods 0.000 claims description 11
- 238000005303 weighing Methods 0.000 claims description 10
- 238000005299 abrasion Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 19
- 230000002159 abnormal effect Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/06—Gas pressure systems operating without fluidisation of the materials
- B65G53/10—Gas pressure systems operating without fluidisation of the materials with pneumatic injection of the materials by the propelling gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/50—Pneumatic devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
The invention relates to a powder pneumatic transmission control method, which comprises the steps of collecting operation condition data of a pneumatic transmission assembly, wherein the operation condition data comprises air pressure data of air flow output by an air source, air pressure data of each part of a pipeline and pressure difference data among the parts of the pipeline; when the pneumatic transmission assembly is debugged, analyzing the change rule among various operation condition data, and obtaining a standard change rule by sorting; when the pneumatic conveying assembly operates, the air pressure of the air flow output by the air source is adjusted according to the change of the pressure difference data among all parts of the pipeline; monitoring the change rule among the various operating condition data, and reminding a worker to make a maintenance plan and a maintenance scheme when the change rule among the various operating condition data does not accord with the standard change rule. The pneumatic dust conveying device can dynamically adjust the air pressure of air flow output by the air source according to the conveying resistance of dust, reduce the idle work done by the pneumatic conveying assembly, reduce the dust conveying amount in a dilute phase conveying mode, and further reduce the abrasion of a pipeline in the dust conveying process.
Description
Technical Field
The invention relates to the field of powder conveying, in particular to a powder pneumatic conveying control method.
Background
The pneumatic powder conveying equipment is one kind of conveying equipment for industrial production and has airflow to convey powder inside sealed pipeline. The pneumatic conveying equipment generally comprises a first storage bin for primarily collecting powder, a bin pump for conveying the powder, an air source for providing air flow and a second storage bin for intensively collecting the powder, wherein the top end of the bin pump is communicated with the first storage bin, a pipeline is further arranged between the bin pump and the second storage bin for communicating, when the bin pump runs, the powder of the first storage bin is firstly input into the bin pump, the air source inputs the air flow into the bin pump, and the powder is driven to flow into the second storage bin through the pipeline. The powder can be conveyed along different directions by changing the installation direction of the pipeline, so that the powder conveying device is convenient to use.
When the bag-type dust collector is filtered, a pneumatic conveying device is generally arranged to transfer dust collected by the bag. In the dust conveying process, the types, particle sizes and conveying amount of dust are changed continuously, and the operation mode of the pneumatic conveying equipment is difficult to adjust adaptively according to the factors. In view of the above situation, the conventional pneumatic conveying equipment has the following problems in terms of operation, maintenance, and maintenance:
1. The output force of the pneumatic conveying equipment during operation is difficult to adapt to the requirement of dust conveying, and the design output force of the pneumatic conveying equipment can leave a certain margin which is about 120-200% of the actual conveying capacity of materials. Even if the dust remover runs at full load, 15% -50% of the equipment can still do useless work, and if the working load of the dust remover is reduced, the proportion of the useless work done by the pneumatic conveying equipment is larger. In addition, as the useless work done by pneumatic conveying equipment is increased, the conveying form of dust is changed into dilute phase conveying, the energy consumption of the conveying mode is higher, and the abrasion to the pipeline is increased.
2. In the dust conveying process, the operation state of the pneumatic conveying equipment is not ideal, so that a scientific maintenance plan and a maintenance scheme are difficult to make for the pneumatic conveying equipment, and the service life of the equipment is shortened.
3. When the powder pneumatic conveying equipment breaks down, the powder pneumatic conveying equipment is difficult to locate and know the clear failure reason, and needs to be checked gradually by workers on site, so that the powder pneumatic conveying equipment is inconvenient to maintain.
4. The operation condition of the powder pneumatic conveying equipment is observed or data are collected by staff regularly, the operation condition of the equipment is difficult to know in time, and if the staff cannot find problems in time and replace and maintain accessories, the abrasion of a pipeline elbow can occur, so that the dust leakage pollutes a factory area. In addition, if powder pneumatic conveyor takes place to block up, then the sack cleaner also is difficult to normal operating, leads to stifled pipe and ash bucket deposition problem, and the flue gas pressure differential grow of sack cleaner air intake and air outlet accelerates the filter bag or strains a section of thick bamboo wearing and tearing, still can increase the draught fan work load of suction flue gas simultaneously, reduces the life of draught fan.
Disclosure of Invention
In view of the above-mentioned shortcomings in the prior art, an object of the present invention is to provide a method for controlling pneumatic powder delivery, which solves one or more problems in the prior art.
In order to realize the purpose, the technical scheme of the invention is as follows:
a pneumatic powder conveying control method comprises
Collecting operation condition data of the pneumatic conveying assembly, wherein the operation condition data comprises air pressure data of air flow output by an air source, air pressure data of each part of a pipeline and pressure difference data among the parts of the pipeline;
when the pneumatic conveying assembly is debugged, analyzing the change rule among the operation condition data, and obtaining a standard change rule by sorting;
when the pneumatic conveying assembly operates, the air pressure of the air flow output by the air source is adjusted according to the change of the pressure difference data among all parts of the pipeline;
and monitoring the change rule among the operation condition data, and reminding workers to make a maintenance plan and a maintenance scheme when the change rule among the operation condition data does not accord with the standard change rule.
Furthermore, an allowable error range is preset, and when the difference value between the change rule between the operation condition data and the standard change rule exceeds the allowable error range, the working personnel is reminded to make a maintenance plan and a maintenance scheme.
Further, when the pneumatic transmission assembly is debugged, the change range of each item of operation condition data is collated, and a standard change range is set according to the change range of each item of operation condition data;
when the pneumatic conveying assembly operates, monitoring each item of operating condition data, and when any item of operating condition data is separated from the standard variation range, controlling the pneumatic conveying assembly to stop operating and reminding workers to overhaul the pneumatic conveying assembly.
Further, when any one of the operation condition data is deviated from the standard variation range, the operation condition data deviated from the standard variation range is marked first.
Furthermore, the operation condition data also comprises flow data of the air source output air flow, and when a maintenance scheme is formulated and the maintenance is carried out, the part needing to be maintained or maintained is analyzed according to the operation condition data.
Further, operation load data during operation of the pneumatic conveying assembly is collected, the operation load data comprises particle size data of dust in a bin pump and weight data of the dust in the bin pump, and a plurality of groups of standard change rules and standard change ranges are set according to different operation load data.
Further, when the particle size data of the dust in the bin pump and/or the weight data of the dust in the bin pump are increased, the air pressure of the air flow output by the air source is increased;
and when the particle size data of the dust in the bin pump and/or the weight data of the dust in the bin pump are reduced, reducing the air pressure of the air flow output by the air source.
Furthermore, the particle size data of dust in the bin pump is acquired through a particle size detection sensor which is arranged at a feed inlet of the bin pump.
Further, the weight data of dust in the bin pump is acquired through a weighing sensor, and the weighing sensor calculates the weight data of the dust in the bin pump by measuring the weight of the bin pump before and after the bin pump is filled with the dust.
Furthermore, when the pneumatic conveying assembly runs, the storage amount of dust in the first storage bin and the second storage bin is monitored, so that when the first storage bin is emptied or the second storage bin is full, the pneumatic conveying assembly is controlled to stop running.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the air pressure data of each part of the pipeline when the pneumatic conveying assembly conveys dust, the pressure difference data among all parts of the pipeline can be known, so that the resistance of conveying dust in the pipeline is known, and when the resistance of conveying dust is increased, the air pressure of air flow output by an air source is increased; when the resistance of conveying dust is reduced, the air pressure of the air flow output by the air source is reduced. The air pressure of the air flow output by the air source is dynamically adjusted according to the conveying resistance of the dust, the idle work done by the pneumatic conveying assembly can be reduced, the energy consumption is reduced, the dust quantity conveyed in a dilute phase conveying mode is reduced, and the abrasion of the dust conveying process to a pipeline is further reduced. When the pneumatic conveying assembly normally operates, standard change rules exist among various operating condition data, and if the change rule of the operating condition data is detected to be separated from the standard change rules in the operating process, the pneumatic conveying assembly is abnormal and needs to be maintained or maintained in time.
And (II) when the operation working condition data is separated from the standard variation range, if an accident situation occurs in the operation process of the pneumatic conveying assembly, the operation working condition data can be changed violently, and if the operation working condition data is monitored to be changed violently and separated from the standard variation range, a worker is reminded to pay attention to the operation problem of the pneumatic conveying assembly, so that the worker can be ensured to find the operation problem of the pneumatic conveying assembly in time and overhaul the pneumatic conveying assembly.
And (III) the first operating condition data which is out of the standard variation range is generally directly caused by unexpected conditions, so that the first operating condition data which is out of the standard variation range is marked, and the position needing to be repaired or maintained can be conveniently analyzed by a worker.
And (IV) if the operating load data have larger difference during the operation of the pneumatic transmission assembly, a plurality of groups of operating load data are set during debugging and operation, and the standard change rules and the standard change ranges among the operating condition data are also arranged into a plurality of groups so as to correspond to the operating load data of different groups. When the pneumatic conveying assembly normally operates, comparison is carried out according to a group of standard change rules or standard change ranges corresponding to the operation load data.
Drawings
FIG. 1 is a flow chart showing a pneumatic powder conveying control method according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a pneumatic powder conveying system in the embodiment of the invention;
fig. 3 shows a schematic connection diagram between the first silo and the silo pump in the embodiment of the invention.
In the drawings, the reference numbers:
1. a bag-type dust collector; 11. a buried scraper conveyor; 2. a first storage bin; 21. a first high level gauge; 22. a first low level gauge; 23. a particle diameter detection sensor; 24. a hose; 25. a first valve; 3. a bin pump; 31. a weighing sensor; 32. an exhaust valve; 321. an exhaust pipe; 4. a pipeline; 41. a second pressure transmitter; 5. a second storage bin; 51. a second high level gauge; 52. a second low level indicator; 53. a discharge box; 54. a vacuum pressure release valve; 55. a pulse blowing bag type dust collector; 56. a third valve; 6. a gas source; 61. a first pressure transmitter; 62. a flow meter; 63. a second valve; 64. a pneumatic valve bank; 65. a boost valve bank; 7. a communication module; 71. a controller; 72. an industrial personal computer; 73. a remote computer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the pneumatic powder conveying control method according to the present invention will be described in detail with reference to the accompanying drawings and the following detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.
Examples
Referring to fig. 1, the present application provides a powder pneumatic conveying control method, which includes:
s1, collecting operation condition data of a pneumatic conveying assembly, wherein the operation condition data comprises air pressure data of air flow output by an air source 6, air pressure data of each part of a pipeline 4 and pressure difference data among the parts of the pipeline 4;
s2, when the pneumatic conveying assembly is debugged, analyzing the change rule among the operation condition data, and obtaining a standard change rule by sorting;
s3, when the pneumatic conveying assembly operates, adjusting the air pressure of the air flow output by the air source 6 according to the change of pressure difference data among all parts of the pipeline 4;
and S4, monitoring the change rule among the operation condition data, and reminding a worker to make a maintenance plan and a maintenance scheme when the change rule among the operation condition data does not accord with the standard change rule.
Furthermore, an allowable error range is preset, and when the difference value between the change rule between the operation condition data and the standard change rule exceeds the allowable error range, the working personnel is reminded to make a maintenance plan and a maintenance scheme. When the pneumatic conveying assembly normally operates, the change rule among various operation working condition data fluctuates, an error range is set, and the situation that the normal work of workers is influenced due to the fact that the workers are frequently reminded when the change rule among the various operation working condition data fluctuates can be avoided.
Furthermore, when the pneumatic transmission assembly is debugged, the change range of each item of operation condition data is collated, and the standard change range is set according to the change range of each item of operation condition data. When the pneumatic conveying assembly operates, various operating condition data are monitored, if the pneumatic conveying assembly has an accident situation, various operating condition data can be caused to change violently, and if the operating condition data are monitored to change violently and are separated from a standard change range, a worker is reminded to pay attention to the operating problem of the pneumatic conveying assembly, so that the worker can be guaranteed to find the operating problem of the pneumatic conveying assembly in time and overhaul the pneumatic conveying assembly.
In addition, when any one of the operation condition data is out of the standard variation range, the operation condition data out of the standard variation range is marked first. Because the first operating condition data which is out of the standard variation range is generally directly caused by unexpected conditions, and the other operating condition data is possibly indirectly caused by the unexpected conditions, the first operating condition data which is out of the standard variation range is marked, so that workers can conveniently analyze positions needing to be repaired or maintained.
In this embodiment, the operation condition data further includes flow data of the air flow output by the air source 6, and when a maintenance scheme is formulated and maintained, a part needing maintenance or maintenance can be analyzed according to the operation condition data, for example, whether each part of the pipeline 4 is abnormal or not can be judged according to the change of pressure difference data between each part of the pipeline 4; whether pipelines of the air flow output by the air source 6 are abnormal or not can be judged according to the air pressure data of all parts of the pipeline 4, the air pressure data of the air flow output by the air source 6 and the flow data of the air flow output by the air source 6, and the abnormal positions need to be maintained in time so as to avoid the accidents of blockage or breakage.
And acquiring operation load data of the pneumatic conveying assembly during operation, wherein the operation load data comprises particle size data of dust in the bin pump 3 and weight data of the dust in the bin pump 3. And setting a plurality of groups of standard change rules and standard change ranges according to different operation load data. When the pneumatic conveying assembly operates, dust with different particle sizes or weights may need to be conveyed, the operating load data has larger difference, a plurality of groups of operating load data are set during debugging and operation, and each group of standard change rules and standard change ranges corresponding to the operating condition data are arranged according to each group of operating load data. When the pneumatic transmission assembly normally operates, comparison needs to be carried out according to a set of standard change rules or standard change ranges corresponding to the operation load data, so that the problem of the pneumatic transmission assembly can be solved accurately.
Specifically, the particle size data of the dust in the bin pump 3 and the weight data of the dust in the bin pump 3 also influence the dust conveying resistance. When the pneumatic conveying assembly operates, the air pressure of the air flow output by the air source 6 needs to be adjusted according to the particle size data of the dust in the bin pump 3 and the weight data of the dust in the bin pump 3, so that the dust is smoothly conveyed forwards, and the useless work done by the pneumatic conveying assembly is reduced. Such as:
When the particle size data of the dust in the bin pump 3 and the weight data of the dust in the bin pump 3 are increased, the air pressure of the air flow output by the air source 6 is increased; when the particle size data of the dust in the bin pump 3 and the weight data of the dust in the bin pump 3 are reduced, the air pressure of the air flow output by the air source 6 is reduced.
In this scheme, gather the particle size data of dust in storehouse pump 3 and realize through particle size detection sensor 23, particle size detection sensor 23 installs the feed inlet at storehouse pump 3. When the dust falls into the bin pump 3 from the feed inlet of the bin pump 3, the particle size of the dust can be detected by the particle size detection sensor 23, and the average particle size of the dust filled in the bin pump 3 at each time can be analyzed according to the measured particle size data, so that the resistance change during dust conveying can be known.
The weight data of dust in the collection bin pump 3 is realized through the weighing sensor 31, and the weighing sensor 31 calculates the weight data of the dust in the bin pump 3 by measuring the weight of the bin pump 3 before and after the dust is filled. The weight data of each dust filling of the bin pump 3 is measured, and the resistance of each dust conveying in the bin pump 3 can also be analyzed.
In addition, when the pneumatic conveying assembly runs, the storage amount of dust in the first storage bin 2 and the second storage bin 5 is monitored, so that when the first storage bin 2 is emptied, the pneumatic conveying assembly is controlled to stop running, and the pneumatic conveying assembly is prevented from continuing running and wasting energy when the first storage bin 2 is emptied. When the second silo 5 is full, the resistance to dust continuous transportation becomes large, so that the pneumatic transportation assembly also needs to be stopped to avoid damage caused by excessive operation load of the pneumatic transportation assembly.
Referring to fig. 2 and fig. 3, the above-mentioned solution in this embodiment can be implemented by using the following system:
a powder pneumatic conveying system comprises a pneumatic conveying assembly, a data acquisition assembly, a communication module 7, a controller 71, an industrial personal computer 72 and a remote computer 73, wherein the communication module 7 is used for transmitting data among the data acquisition assembly, the controller 71, the industrial personal computer 72 and the remote computer 73, and the powder pneumatic conveying system comprises:
the pneumatic conveying assembly is used for collecting and transferring dust;
the data acquisition assembly is used for collecting working state data when the pneumatic transmission assembly runs and transmitting the working state data to the controller 71;
and the controller 71 adjusts the operation of the pneumatic conveying assembly according to the working state data.
Referring to fig. 2 and 3, specifically, the pneumatic conveying assembly includes a first bin 2 for primarily collecting dust, a bin pump 3 for conveying the dust, an air source 6 for providing an air flow, and a second bin 5 for centrally collecting the dust, an opening at a top end of the bin pump 3 (i.e., a feed inlet of the bin pump 3) is communicated with the first bin 2, a first valve 25 is further disposed between the bin pump 3 and the first bin 2, and a pipeline 4 is further disposed between the bin pump 3 and the second bin 5 for communicating. The top end opening of first feed bin 2 is used for supplying the dust input, and the intercommunication has hose 24 between the bottom end opening of first feed bin 2 and the top end opening of storehouse pump 3, installs first valve 25 between the top end opening of hose 24 and storehouse pump 3, and the first valve 25 of switching can control the intercommunication relation between storehouse pump 3 and the first feed bin 2 to control the circulation of dust to storehouse pump 3. The air source 6 is communicated with the bin pump 3, and after the first valve 25 is closed, the air source 6 conveys air flow to the bin pump 3, so that dust in the bin pump 3 can be pushed to be conveyed to the second bin 5 along the pipeline 4. In this embodiment, the hose 24 may be a plastic hose 24 or a metal hose 24, and the metal hose 24 has better wear resistance.
Referring to fig. 2 and fig. 3, in the embodiment, the pneumatic conveying assembly is used for conveying dust collected by the bag-type dust collector 1, the embedded scraper conveyor 11 is installed at the bottom end of the bag-type dust collector 1, bottom openings of the dust hoppers of the bag-type dust collector 1 are all communicated with the embedded scraper conveyor 11, one end of the embedded scraper conveyor 11 points to a top opening of the first bin 2 when the bag-type dust collector 1 operates, and when the embedded scraper conveyor 11 operates, the dust collected by the dust hoppers is sprinkled into the first bin 2 from the top opening of the first bin 2.
Referring to fig. 2 and fig. 3, in detail, the air source 6 is connected to a second valve 63, and is connected to a pneumatic valve set 64 and four boosting valve sets 65 through the second valve 63, the pneumatic valve set 64 is connected to the four boosting valve sets 65 in parallel, and the air source 6, the second valve 63, the pneumatic valve set 64 and the boosting valve sets 65 are connected to each other through a plurality of air pipes. The pneumatic valve group 64 and the boosting valve group 65 both comprise four flow regulating valves which are connected in parallel, the flow regulating valves of the pneumatic valve group 64 are communicated with the inner wall of the bin pump 3, and four connecting nodes between the pneumatic valve group 64 and the bin pump 3 are arranged along the flowing direction of dust in the bin pump 3. The four boosting valve groups 65 are uniformly arranged along the length direction of the pipeline 4, that is, the connection nodes between the four boosting valve groups 65 and the pipeline 4 are uniformly arranged along the length direction of the pipeline 4, and meanwhile, the four flow regulating valves of each boosting valve group 65 are arranged along the length direction of the pipeline 4 and communicated with the inner wall of the pipeline 4.
Referring to fig. 2 and fig. 3, further, an exhaust valve 32 is further installed on the top surface of the bin pump 3, an opening at one end of the exhaust valve 32 is communicated with the inner wall of the bin pump 3, and an opening at the other end of the exhaust valve 32 is communicated with an exhaust pipe 321. One end of the exhaust pipe 321 is communicated with the exhaust valve 32, and the other end is communicated with the inner side wall of the ash bucket of the bag-type dust collector 1.
Referring to fig. 2 and 3, in detail, a discharge box 53, a vacuum pressure release valve 54 and a pulse-blowing bag-type dust collector 55 are installed at the top end of the second silo 5, and a third valve 56 is installed at the bottom end of the second silo 5. In this embodiment, the discharge box 53 is welded on the top surface of the second storage bin 5, and the bottom end of the discharge box 53 is communicated with the chamber of the second storage bin 5; the vacuum air pressure relief valve 54 is used to protect the second silo 5 from excessive positive and negative pressures; when the air flow output by the air source 6 flows into the second storage bin 5 and then flows out of the pulse blowing bag type dust collector 55, the pulse blowing bag type dust collector 55 is used for filtering dust mixed in the air flow, so that the dust is prevented from overflowing along with the air flow to pollute the environment of a factory building. In this embodiment, the one end of pipeline 4 and the bottom opening intercommunication of storehouse pump 3, the other end of pipeline 4 and the lateral wall intercommunication of discharge box 53, at the in-process of carrying the dust, the dust in the pipeline 4 is carried to the discharge box 53 at first in, and the dust falls into second feed bin 5 from the discharge box 53 afterwards.
Referring to fig. 2 and 3, in particular, the data acquisition assembly includes: first high level indicator 21, first low level indicator 22, second high level indicator 51, second low level indicator 52, particle size detection sensor 23, weighing sensor 31, first pressure transmitter 61, flowmeter 62, second pressure transmitter 41, wherein:
the first high material level indicator 21 and the first low material level indicator 22 are both arranged on the side wall of the first storage bin 2, and the mounting position of the first high material level indicator 21 is higher than that of the first low material level indicator 22; the second high level gauge 51 and the second low level gauge 52 are installed at a side wall of the second silo 5, and the second high level gauge 51 is installed at a position higher than the second low level gauge 52. The first high level indicator 21 is matched with the first low level indicator 22 and is used for monitoring the dust storage amount in the first storage bin 2; the second high level gauge 51 cooperates with a second low level gauge 52 for monitoring the amount of dust stored in the second silo 5. When the first silo 2 is monitored to be emptied or the second silo 5 is monitored to be full, the controller 71 controls the pneumatic conveying assembly to stop running.
In this embodiment, particle size detection sensor 23 is installed between first feed bin 2 and hose 24, and particle size detection sensor 23 can detect the particle size of dust, can analyze the average particle size of storehouse pump 3 dust of filling at every turn according to the particle size data that measure to know the resistance change when carrying the dust.
The bin pump 3 is arranged on a support (not shown in the figure), the support is used for supporting the bin pump 3, the weighing sensor 31 is arranged between the support and the bin pump 3, the weighing sensor 31 can measure the weight of the bin pump 3 before and after dust is filled when the bin pump works, and the weight data of the dust in the bin pump 3 can be obtained by subtracting the weight data.
Referring to fig. 2 and 3, a first pressure transducer 61 and a flow meter 62 are connected in series between the second valve 63 and the gas source 6, the first pressure transducer 61 is used for detecting the gas pressure of the gas flow outputted from the gas source 6, and the flow meter 62 is used for detecting the flow rate of the gas flow outputted from the gas source 6. In this embodiment, the pipeline 4 is further connected with four second pressure transmitters 41, and the four second pressure transmitters 41 are uniformly arranged along the length direction of the pipeline 4 (i.e., the pipeline 4 is divided into four parts with the same length along the length direction, and the four second pressure transmitters 41 are used to measure air pressure data of each part of the pipeline 4 respectively). It should be noted that, when measuring the air pressure data of each part of the pipeline 4, the length of each part of the pipeline 4 should be adjusted and the number of the parts of the pipeline 4 should be increased or decreased according to the requirement of measurement accuracy, and specific division rules are not described herein again.
In this embodiment, the working state data to be measured includes air pressure data of the air flow output by the air source 6, air pressure data of each part of the pipeline 4 (which may be used to calculate pressure difference data between each part of the pipeline 4), particle size data of the dust in the bin pump 3, weight data of the dust in the bin pump 3, and flow data of the air flow output by the air source 6. The working state data can be used for judging the running state of the pneumatic conveying assembly, and the specific judging method comprises the following steps:
After the pneumatic conveying assembly is installed, debugging operation is firstly carried out, the working state data is collected and recorded, the particle size data of dust in the bin pump 3 and the weight data of the dust in the bin pump 3 are recorded as operation load data, and the air pressure data of air flow output by the air source 6, the air pressure data of each part of the pipeline 4, the pressure difference data among each part of the pipeline 4 and the flow data of the air flow output by the air source 6 are recorded as operation working condition data.
When the operation load data is constant, the operation condition data have a certain change rule, such as: the air pressure data of the air flow output by the air source 6 is increased, the flow data of the air flow output by the air source 6 is gradually increased, and the air pressure data of each part of the pipeline 4 and the pressure difference data among the parts of the pipeline 4 are also increased. During debugging operation, a standard change rule can be set according to a detection result, when the pneumatic conveying assembly operates stably, the operation load data generally keeps stable, and the change rule among various corresponding operation condition data accords with the standard change rule. If the operating load data of the pneumatic transmission assembly has large difference during operation, a plurality of groups of operating load data should be set during debugging operation, and the standard change rules among the operating condition data should be arranged into a plurality of groups so as to correspond to different groups of operating load data. When the pneumatic conveying assembly normally operates, comparison needs to be carried out according to a standard change rule corresponding to the operation load data.
Referring to fig. 2 and 3, in this embodiment, the controller 71 needs to dynamically adjust the air pressure of the output air flow of the air source 6 according to the operation load data and the pressure difference data between the parts of the pipeline 4, and control the operation of the pneumatic valve set 64 and the boosting valve set 65, i.e. determine the dust conveying resistance, and thus dynamically adjust the operation of the pneumatic conveying assembly to reduce the useless work performed by the pneumatic conveying assembly. If the particle size data of the dust in the bin pump 3 becomes larger or the weight data of the dust in the bin pump 3 becomes larger, it means that the resistance for conveying the dust is increased, and the air pressure of the air flow output by the air source 6 needs to be increased; otherwise, the pressure of the gas flow output by the gas source 6 is reduced. If the pressure difference between the two parts of the pipeline 4 becomes larger, the resistance for conveying dust becomes larger, and the air pressure of the air flow output by the air source 6 needs to be increased; if the pressure difference between the two parts of the duct 4 becomes smaller, the pressure of the gas flow output by the gas source 6 can be reduced. In addition, when the pressure difference data between the two parts of the pipeline 4 becomes large, the controller 71 should also control the flow regulating valves of the pneumatic valve bank 64 and the boosting valve bank 65 to open and close, control the boosting valve bank 65 close to the position where the pressure difference is increased to increase the output airflow, and output the airflow to the position where the resistance is increased by the boosting valve bank 65 close to the position where the pressure difference is increased, so that the requirement on the air pressure of the airflow output by the air source 6 can be reduced, that is, the air pressure of the airflow output by the air source 6 can be reduced, the useless work done by the pneumatic conveying assembly can be reduced, and the energy consumption can be reduced.
When the pneumatic transmission component stably operates, the working state data are continuously monitored, the data acquisition component transmits the collected working state data to a remote computer 73 installed in a central control room, the remote computer 73 compares the change rule of each item of operating condition data with the standard change rule according to the corresponding operating load data, if the difference between the change rule and the standard change rule is larger than the standard change rule (the remote computer 73 should be preset with an allowable error range, and if the difference between the change rule of each item of operating condition data and the standard change rule exceeds the allowable range), it indicates that a maintenance plan and a maintenance scheme need to be set in time, and the remote computer 73 can directly remind a worker in the central control room to make a maintenance plan and a maintenance scheme. Regarding the establishment of the maintenance scheme, the recorded operation condition data should be referred to, such as: according to the change of the pressure difference data among all parts of the pipeline 4, whether all parts of the pipeline 4 are abnormal or not can be judged; whether each section of gas transmission pipeline is abnormal or not can be judged according to the gas pressure data of each part of the pipeline 4, the gas pressure data of the gas flow output by the gas source 6 and the flow data of the gas flow output by the gas source 6, and the abnormal positions need to be maintained in time so as to avoid the accidents of blockage or breakage.
It should be understood that, when the pneumatic transmission assembly operates, each operating condition data changes within a certain range, and in the debugging operation process, the change range of each operating condition data should be recorded, and the standard change range is set according to the change range of the operating condition data, and each operating condition data changes within the standard change range, and each operating condition data has a change rule. When the pneumatic conveying assembly stably operates, the operation condition data is monitored, if a certain operation condition data is changed violently and departs from a standard change range, the pipeline 4 and the gas transmission pipeline are possibly blocked or broken, the controller 71 can directly stop the operation of the pneumatic conveying assembly, and meanwhile, the remote computer 73 timely informs workers of paying attention to the operation problem of the pneumatic conveying assembly, so that the workers can find the operation problem of the pneumatic conveying assembly timely and overhaul the pneumatic conveying assembly.
Generally, the first operating condition data out of the standard variation range is directly caused by an unexpected condition, and the other operating condition data out of the standard variation range is indirectly caused by the unexpected condition. When the remote computer 73 monitors the operating condition data, the first operating condition data that deviates from the standard variation range should be marked, thereby facilitating the analysis of the position to be repaired or maintained by the worker.
In addition, when the pneumatic conveying assembly operates, the data acquisition assembly displays the acquired working state data on the interface of the industrial personal computer 72, and a worker can conveniently know the working state data when the pneumatic conveying assembly operates through the interface of the industrial personal computer 72. In addition, the remote computer 73 can analyze various operation condition data, compare the operation condition data with a standard change range, recognize abnormal operation condition data, and mark the operation condition data (namely, the abnormal operation condition data) which is firstly separated from the standard change range, so that a worker can analyze and know the problem corresponding to the abnormal operation condition data, thereby quickly judging the position where the fault occurs, and being convenient for maintenance without gradually checking the position on site.
The working principle is as follows:
when the pneumatic conveying assembly operates, the controller 71 dynamically adjusts the air pressure of the air flow output by the air source 6 in real time according to the conveying resistance of the dust, so as to reduce the idle work done by the pneumatic conveying assembly, reduce the energy consumption, reduce the dust amount conveyed in a dilute phase conveying mode and reduce the abrasion of the dust conveying process on the pipeline 4. Meanwhile, the remote computer 73 analyzes whether the change rule among the operation condition data meets the standard change rule or not and whether the operation condition data is out of the standard change range or not in real time according to the operation load data, so that the worker is reminded to set a maintenance plan and a maintenance scheme in time, and when an unexpected condition occurs, the worker is guaranteed to find the operation problem of the pneumatic conveying assembly in time.
All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (10)
1. A powder pneumatic conveying control method is characterized in that: comprises that
Collecting operation condition data of the pneumatic transmission assembly, wherein the operation condition data comprises air pressure data of air flow output by an air source, air pressure data of each part of a pipeline and pressure difference data among the parts of the pipeline;
when the pneumatic transmission assembly is debugged, analyzing the change rule among the operation condition data, and obtaining a standard change rule by sorting;
When the pneumatic conveying assembly operates, the air pressure of the air flow output by the air source is adjusted according to the change of the pressure difference data among all parts of the pipeline;
and monitoring the change rule among the operation condition data, and reminding workers to make a maintenance plan and a maintenance scheme when the change rule among the operation condition data does not accord with the standard change rule.
2. The pneumatic powder conveying control method according to claim 1, characterized in that: and presetting an allowable error range, and reminding a worker to make a maintenance plan and a maintenance scheme when the difference value between the change rule between the operation condition data and the standard change rule exceeds the allowable error range.
3. The pneumatic powder conveying control method according to claim 1, characterized in that: when the pneumatic transmission assembly is debugged, the change ranges of the operation condition data are arranged, and a standard change range is set according to the change ranges of the operation condition data;
when the pneumatic transmission assembly operates, monitoring various operating condition data, and when any operating condition data is separated from the standard variation range, controlling the pneumatic transmission assembly to stop operating and reminding a worker to overhaul the pneumatic transmission assembly.
4. The pneumatic powder conveying control method according to claim 3, characterized in that: when any item of the operation condition data is deviated from the standard variation range, the operation condition data deviated from the standard variation range is marked first.
5. The pneumatic powder conveying control method according to claim 3, characterized in that: the operation condition data also comprises flow data of air source output air flow, and when a maintenance scheme is formulated and the maintenance is carried out, the position needing to be maintained or maintained is analyzed according to the operation condition data.
6. The pneumatic powder conveying control method according to claim 3, characterized in that: collecting operation load data of the pneumatic conveying assembly during operation, wherein the operation load data comprises particle size data of dust in a bin pump and weight data of the dust in the bin pump, and setting a plurality of groups of standard change rules and standard change ranges according to different operation load data.
7. The pneumatic powder conveying control method according to claim 6, characterized in that: when the particle size data of the dust in the bin pump and/or the weight data of the dust in the bin pump are increased, the air pressure of the air flow output by the air source is increased;
And when the particle size data of the dust in the bin pump and/or the weight data of the dust in the bin pump are/is reduced, reducing the air pressure of the air flow output by the air source.
8. The pneumatic powder conveying control method according to claim 6, characterized in that: the particle size data of dust in the bin pump is acquired through a particle size detection sensor, and the particle size detection sensor is arranged at a feed inlet of the bin pump.
9. The pneumatic powder conveying control method according to claim 6, characterized in that: the weight data of dust in the bin pump is acquired through a weighing sensor, and the weighing sensor calculates the weight data of the dust in the bin pump by measuring the weight of the bin pump before and after the bin pump is filled with the dust.
10. The pneumatic powder conveying control method according to claim 1, characterized in that: when the pneumatic conveying assembly runs, the storage amount of dust in the first storage bin and the second storage bin is monitored, so that when the first storage bin is emptied or the second storage bin is full, the pneumatic conveying assembly is controlled to stop running.
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