CN112742544A - Debugging method and system for dynamic separator of medium-speed coal mill - Google Patents
Debugging method and system for dynamic separator of medium-speed coal mill Download PDFInfo
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- CN112742544A CN112742544A CN202011508535.1A CN202011508535A CN112742544A CN 112742544 A CN112742544 A CN 112742544A CN 202011508535 A CN202011508535 A CN 202011508535A CN 112742544 A CN112742544 A CN 112742544A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/04—Safety devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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- Disintegrating Or Milling (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention provides a debugging method and a debugging system for a dynamic separator of a medium-speed coal mill, which comprise the following steps: collecting corresponding average values of the particle sizes of the pulverized coal under different operating parameters of the medium-speed coal mill, and generating a relation curve of the operating parameters and the average values of the particle sizes of the pulverized coal; setting a target coal powder granularity; acquiring corresponding operating parameters according to the target coal powder granularity and the relation curve; and setting the corresponding operation parameters as the actual operation parameters of the medium-speed coal mill. According to the invention, the average pulverized coal granularity under each frequency is calculated to obtain the relation curve of the frequency of the separator and the pulverized coal granularity, and the relation curve is led into the dispersion management system to guide the operation of the medium-speed coal mill, so that pulverized coal with the required granularity is accurately produced, the boiler efficiency is improved, the abnormal vibration of the separator is alarmed according to the vibration intensity of the separator induced by the vibration induction device, the damage of an auxiliary machine caused by the fault of the separator is avoided, and the service cycle of the equipment is prolonged.
Description
Technical Field
The invention relates to the technical field of coal powder separation of coal mills, in particular to a debugging method and a debugging system for a dynamic separator of a medium-speed coal mill.
Background
In order to improve the adjustability of the granularity of the pulverized coal, a dynamic separator is generally used, the granularity of the pulverized coal is adjusted through a separator frequency converter, and the dynamic separator separates fine pulverized coal from coarse pulverized coal by aerodynamics and centrifugal force. After the pulverized coal is primarily separated by the fixed deflecting plate, the pulverized coal continuously rises and enters the rotating blade type rotor through the separator body, coal particles in airflow are impacted by the rotor, larger coal particles can be thrown out by the rotor, smaller coal particles can be allowed to pass through the rotor and enter the pulverized coal pipeline, the thrown coal particles return to the grinding bowl and are ground again, and the coal particles can form a circulation process in the coal mill.
However, in actual operation, because there is no reliable means for on-line measurement of the coal dust particle size, operators can adjust the frequency of the separator to a relatively low value for the sake of mill safety, which causes the coal dust particle size entering the furnace to be too high, the carbon content of fly ash to be large, and boiler efficiency to be affected.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, the present invention provides a method and a system for debugging a dynamic separator of a medium speed coal mill, so as to solve the above-mentioned technical problems.
In a first aspect, the present invention provides a method for debugging a dynamic separator of a medium speed coal mill, including:
collecting corresponding average values of the particle sizes of the pulverized coal under different operation parameters of the separator, and generating a relation curve of the operation parameters and the average values of the particle sizes of the pulverized coal;
setting a target coal powder granularity;
acquiring corresponding operating parameters according to the target coal powder granularity and the relation curve;
and setting the corresponding operation parameters as actual operation parameters of the coal mill.
Further, the method for collecting the corresponding average value of the particle size of the pulverized coal under different operation parameters of the separator comprises the following steps:
setting the frequency range of the separator to be 15Hz-45Hz, and setting the frequency regulation step pitch to be 1 Hz;
sequentially adjusting the operating frequency of the separator according to the frequency range and the adjusting step pitch;
after the operation frequency of the separator is monitored to be updated, under the current operation frequency, a plurality of powder pipes are used for sampling the coal powder of the separator;
obtaining a plurality of sample granularities according to a plurality of coal dust sampling samples, and calculating the average coal dust granularity according to the plurality of sample granularities;
and marking the average coal powder granularity at the current operating frequency and then storing.
Further, the method further comprises:
before sampling the pulverized coal of each frequency, setting the separator to run for the same time at each frequency, wherein the running time ranges from 10 minutes to 20 minutes.
Further, the method further comprises:
the vibration sensing device identifies the vibration intensity of the coal mill in the operation process;
and when the vibration intensity exceeds a preset range, the alarm device generates alarm information.
Further, the method further comprises:
recording the vibration intensity of the coal mill under each operating frequency and obtaining the average coal powder granularity of the coal powder sample, and marking the vibration intensity and the average coal powder granularity at the current operating frequency and then storing.
Further, the method further comprises:
obtaining corresponding operating parameters according to the target coal powder granularity and the relation curve, wherein the operating parameters comprise: the operation frequency and the vibration intensity detected under each operation frequency;
and setting the operation frequency with the minimum vibration intensity as an actual operation parameter of the coal mill from the operation frequencies corresponding to the target coal powder granularity.
In a second aspect, the present invention provides a debugging system for a dynamic separator of a medium speed coal mill, including:
the data acquisition unit is configured for acquiring corresponding average values of the granularity of the coal dust under different operating parameters of the medium-speed coal mill and generating a relation curve between the operating parameters and the average values of the granularity of the coal dust;
a particle size setting unit configured to set a target pulverized coal particle size;
the parameter acquisition unit is configured to acquire corresponding operating parameters according to the target coal powder granularity and the relation curve;
and the parameter setting unit is configured to set the corresponding operation parameters as actual operation parameters of the coal mill.
Further, the data acquisition unit includes:
the frequency setting module is electrically connected with the separator and is configured for sequentially adjusting the operating frequency of the separator according to the frequency range and the adjusting step pitch;
the coal powder sampling module comprises a plurality of powder pipes and is mechanically connected with the separator;
the particle size measuring module is configured for obtaining a plurality of sample particle sizes according to a plurality of coal powder sampling samples and calculating the average coal powder particle size according to the plurality of sample particle sizes;
and the data storage module is configured to mark the average coal dust particle size with the current operating frequency and store the marked average coal dust particle size.
Further, the system further comprises:
and the time setting module is configured to set the time for which the separator operates at each frequency before sampling the pulverized coal at each frequency.
Further, the system further comprises:
the vibration sensing unit is configured for identifying the vibration intensity of the coal mill in the operation process;
and the alarm unit is configured to give an alarm and generate alarm information when the vibration intensity exceeds a preset range.
The beneficial effect of the invention is that,
the debugging method and the debugging system of the dynamic separator of the medium speed coal mill provided by the invention have the advantages that the relation curve of the frequency of the separator and the granularity of the coal powder is obtained by calculating the average value of the granularity of the coal powder under each frequency, the relation curve of the frequency of the separator and the granularity of the coal powder is led in a decentralized control system to guide the operation of the medium speed coal mill, and the operation state of the separator is monitored according to the vibration condition of the separator, so that the operation safety of the coal mill is improved while the granularity of the coal powder is ensured and the boiler efficiency is improved, the damage of a boiler auxiliary machine caused by the fault of the coal mill is avoided, and the service cycle of equipment is prolonged.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic flow diagram of a method of one embodiment of the invention.
FIG. 2 is a schematic block diagram of a system of one embodiment of the present invention.
Fig. 3 is a schematic structural view of a part of the units of one embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
As shown in fig. 1, the present embodiment provides a method for debugging a dynamic separator of a medium speed coal mill, including:
setting the operating frequency of a separator of a medium-speed coal mill to be between 15 and 45Hz, and setting the initial frequency to be 15 Hz;
the default separator is fixedly operated for 15 minutes at each frequency, the operation time in actual production is not limited to 15 minutes, the operation time can be set to be any time period from 10 minutes to 20 minutes, workers can change according to the actual operation condition, but if the operation time is less than 10 minutes, the separation is insufficient, and if the operation time is more than 20 minutes, unnecessary waste in terms of time and power is caused, and the testing efficiency is reduced.
After the coal dust is operated for 15 minutes under the frequency, the coal dust is sampled by 4 powder pipes, 4 coal dust samples can be obtained, the particle sizes of the 4 coal dust samples are respectively measured by a powder fineness measuring device, and the average value of the particle sizes of the 4 coal dust samples is calculated.
After the average value of the coal powder granularity at the frequency is successfully obtained, the coal powder granularity average value and the corresponding frequency are recorded and stored, meanwhile, the frequency of a separator of the medium-speed coal mill is increased by 1Hz, the coal powder sampling and average value calculating processes are repeated until the frequency of the separator reaches 45Hz, so that the coal powder granularity average value of the separator at each frequency between 15Hz and 45Hz is obtained, and a relation curve of the operating frequency and the coal powder granularity average value is generated.
Importing a relation curve of the operation frequency and the average value of the granularity of the pulverized coal into a dispersion management system to guide the operation of the medium-speed coal mill, and the specific steps are as follows: and setting target coal powder granularity required by production in a dispersion management system, acquiring the operating frequency corresponding to the separator of the medium-speed coal mill according to the required target coal powder granularity and the introduced relation curve, and setting the corresponding operating frequency as the actual operating frequency of the separator of the medium-speed coal mill.
In the separator operation process, set up the vibration condition of separator in two vibration sensor monitoring separators at the separator top, and report to the police when the vibration condition exceedes normal range for remind the staff to reduce the operating frequency of separator, in order to prevent because excessive vibration leads to mechanical failure.
Example 2
The embodiment provides a debugging method of a dynamic separator of a medium-speed coal mill, which comprises the following steps:
setting the operating frequency of a separator of a medium-speed coal mill to be between 15 and 45Hz, and setting the initial frequency to be 15 Hz;
the default separator is fixedly operated for 15 minutes at each frequency, the operation time in actual production is not limited to 15 minutes, the operation time can be set to be any time period from 10 minutes to 20 minutes, workers can change according to the actual operation condition, but if the operation time is less than 10 minutes, the separation is insufficient, and if the operation time is more than 20 minutes, unnecessary waste in terms of time and power is caused, and the testing efficiency is reduced.
During the 15 minutes of operation at this frequency, two vibration sensors placed at the top of the separator monitored the vibration of the separator, recorded the 15 minutes of vibration data and finally calculated the average of the 2 vibration data.
After the coal dust is operated for 15 minutes under the frequency, the coal dust is sampled by 4 powder pipes, 4 coal dust samples can be obtained, the particle sizes of the 4 coal dust samples are respectively measured by a powder fineness measuring device, and the average value of the particle sizes of the 4 coal dust samples is calculated.
After the average value of the coal powder granularity under the frequency is successfully obtained, the average value of the coal powder granularity, the corresponding frequency and the vibration average value under the frequency are recorded and stored, meanwhile, the frequency of a separator of the medium-speed coal mill is increased by 1Hz, the processes of coal powder sampling and average value calculation are repeated until the frequency of the separator reaches 45Hz, so that the coal powder granularity average value and the vibration average value under each frequency of the separator frequency between 15Hz and 45Hz are obtained, and a relation curve of the running frequency and the coal powder granularity average value and the vibration average value is generated.
The relation curve of the operation frequency, the average value of the granularity of the pulverized coal and the average value of vibration is led into a dispersion management system to guide the operation of the medium-speed coal mill, and the method comprises the following specific steps: the method comprises the steps of setting target coal powder granularity required by production in a decentralized management system, obtaining an operation frequency interval corresponding to a separator of the medium-speed coal mill according to the required target coal powder granularity and an introduced relation curve, selecting the operation frequency with the minimum vibration average value from the operation frequency interval, and setting the corresponding operation frequency as the actual operation frequency of the separator of the medium-speed coal mill, so that the coal powder required by production can be obtained, and the vibration of the separator of the medium-speed coal mill is in the minimum state.
In the operation process of the separator, when the vibration condition of the separator monitored by the two vibration sensors arranged at the top of the separator exceeds a normal range, an alarm is given for reminding workers to reduce the operation frequency of the separator so as to prevent mechanical failure caused by excessive vibration.
Example 3
As shown in fig. 2, the present embodiment provides a debugging system for a dynamic separator of a medium speed coal mill, including:
the data acquisition unit is configured for acquiring corresponding average values of the granularity of the coal dust under different operating parameters of the medium-speed coal mill and generating a relation curve between the operating parameters and the average values of the granularity of the coal dust;
a particle size setting unit configured to set a target pulverized coal particle size;
the parameter acquisition unit is configured to acquire corresponding operating parameters according to the target coal powder granularity and the relation curve;
and the parameter setting unit is configured to set the corresponding operation parameters as actual operation parameters of the coal mill.
Optionally, as an embodiment of the present invention, the system further includes:
the vibration sensing unit is configured for identifying the vibration intensity of the coal mill in the operation process;
and the alarm unit is configured to generate alarm information when the vibration intensity exceeds a preset range.
As shown in fig. 3, the data acquisition unit includes:
the frequency setting module is configured to sequentially adjust the operating frequency of the separator according to the frequency range and the adjusting step pitch;
a frequency adjustment module configured to set a frequency range of the separator, the frequency range being 15Hz-45Hz, and a frequency adjustment step pitch being 1 Hz;
the coal powder sampling module is configured to sample coal powder of the separator by using a plurality of powder pipes under the current operating frequency after monitoring that the operating frequency of the separator is updated;
the particle size measuring module is configured for obtaining a plurality of sample particle sizes according to a plurality of coal powder sampling samples and calculating the average coal powder particle size according to the plurality of sample particle sizes;
and the data storage module is configured to mark the average coal dust particle size with the current operating frequency and store the marked average coal dust particle size.
Optionally, as an embodiment of the present invention, the data acquisition unit further includes:
and the time setting module is configured for setting the separator to operate for the same time under each frequency before sampling the pulverized coal of each frequency, and the operation time range is any time period from 10 minutes to 20 minutes.
The same and similar parts in the various embodiments in this specification may be referred to each other. In particular, for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the description in the method embodiment.
In the embodiments provided in the present invention, it should be understood that the disclosed system and method can be implemented in other ways. For example, the above-described system embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A debugging method of a dynamic separator of a medium speed coal mill is characterized by comprising the following steps:
collecting corresponding average values of the particle sizes of the pulverized coal under different operation parameters of the separator, and generating a relation curve of the operation parameters and the average values of the particle sizes of the pulverized coal;
setting a target coal powder granularity;
acquiring corresponding operating parameters according to the target coal powder granularity and the relation curve;
and setting the corresponding operation parameters as actual operation parameters of the coal mill.
2. The method according to claim 1, wherein the method of collecting respective average particle sizes of the pulverized coal at different operating parameters of the separator comprises:
setting the frequency range of the separator to be 15Hz-45Hz, and setting the frequency regulation step pitch to be 1 Hz;
sequentially adjusting the operating frequency of the separator according to the frequency range and the adjusting step pitch;
after the operation frequency of the separator is monitored to be updated, under the current operation frequency, a plurality of powder pipes are used for sampling the coal powder of the separator;
obtaining a plurality of sample granularities according to a plurality of coal dust sampling samples, and calculating the average coal dust granularity according to the plurality of sample granularities;
and marking the average coal powder granularity at the current operating frequency and then storing.
3. The method of claim 2, further comprising:
before sampling the pulverized coal of each frequency, setting the separator to run for the same time at each frequency, wherein the running time ranges from 10 minutes to 20 minutes.
4. The method of claim 1, further comprising:
the vibration sensing device identifies the vibration intensity of the coal mill in the operation process;
when the vibration intensity exceeds the preset range, the alarm device gives an alarm.
5. The method of claim 2, further comprising:
recording the vibration intensity of the coal mill under each operating frequency and obtaining the average coal powder granularity of the coal powder sample, and marking the vibration intensity and the average coal powder granularity at the current operating frequency and then storing.
6. The method of claim 1 and claim 5, further comprising:
obtaining corresponding operating parameters according to the target coal powder granularity and the relation curve, wherein the operating parameters comprise: the operation frequency and the vibration intensity detected under each operation frequency;
and setting the operation frequency with the minimum vibration intensity as an actual operation parameter of the coal mill from the operation frequencies corresponding to the target coal powder granularity.
7. The debugging system of the dynamic separator of the medium-speed coal mill is characterized by comprising the following components:
the data acquisition unit is configured for acquiring corresponding average values of the granularity of the coal dust under different operating parameters of the medium-speed coal mill and generating a relation curve between the operating parameters and the average values of the granularity of the coal dust;
a particle size setting unit configured to set a target pulverized coal particle size;
the parameter acquisition unit is configured to acquire corresponding operating parameters according to the target coal powder granularity and the relation curve;
and the parameter setting unit is configured to set the corresponding operation parameters as actual operation parameters of the coal mill.
8. The apparatus of claim 7, wherein the data acquisition unit comprises:
the frequency setting module is electrically connected with the separator and is configured for sequentially adjusting the operating frequency of the separator according to the frequency range and the adjusting step pitch;
the coal powder sampling module comprises a plurality of powder pipes and is mechanically connected with the separator;
the particle size measuring module is configured for obtaining a plurality of sample particle sizes according to a plurality of coal powder sampling samples and calculating the average coal powder particle size according to the plurality of sample particle sizes;
and the data storage module is configured to mark the average coal dust particle size with the current operating frequency and store the marked average coal dust particle size.
9. The method of claim 7, wherein the system further comprises:
and the time setting module is configured to set the time for which the separator operates at each frequency before sampling the pulverized coal at each frequency.
10. The method of claim 7, wherein the system further comprises:
the vibration sensing unit is configured for identifying the vibration intensity of the coal mill in the operation process;
and the alarm unit is configured to give an alarm and generate alarm information when the vibration intensity exceeds a preset range.
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