CN104749074A - Online continuous pulverized coal fineness tester and control method thereof - Google Patents
Online continuous pulverized coal fineness tester and control method thereof Download PDFInfo
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- CN104749074A CN104749074A CN201510168456.3A CN201510168456A CN104749074A CN 104749074 A CN104749074 A CN 104749074A CN 201510168456 A CN201510168456 A CN 201510168456A CN 104749074 A CN104749074 A CN 104749074A
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Abstract
The invention relates to an online continuous pulverized coal fineness tester and a control method of the online continuous pulverized coal fineness tester. The online continuous pulverized coal fineness tester comprises a pulverized coal sampling apparatus, a sample tank, a sample tank solenoid valve, a 200-micrometer standard sieve, a 90-micrometer standard sieve, a standard sieve bottom and a sieve shaker, which are arranged from top to bottom from a pulverized coal suction pipe. The online continuous pulverized coal fineness tester also comprises a weighing tank and a weighing system, which are communicated by a pulverized coal inlet and outlet pipe, wherein a control main machine is connected with the pulverized coal sampling apparatus, the sieve shaker, the weighing system and all solenoid valves respectively. The control method of the online continuous pulverized coal fineness tester comprises the steps of sampling from the sample tank, feeding to the sieving system, sieving by the sieve shaker, weighing pulverized coal in sieve bodies with various specifications, and calculating the pulverized coal fineness by the control main machine and transmitting to a power station boiler control system. According to the online continuous pulverized coal fineness tester and the control method of the online continuous pulverized coal fineness tester, online sampling, sieving, and weighing are controlled by the control main machine, and the above flows are carried out by compression air used as power source, the cost is low, and the pulverized coal fineness testing is consistent to the national standard.
Description
Technical field
The invention belongs to coal property test equipment technical field, particularly a kind of on-line continuous fineness of pulverized coal analyzer and control method.
Background technology
No matter coal-burning power plant is middle storage formula or unit pulverized-coal system, and fineness of pulverized coal all has considerable influence to the economic security of boiler combustion and the power consumption of coal pulverizer, therefore necessary to the mensuration of online fineness of pulverized coal.
There are laser type, the online particle-size analyzer of diffraction light formula at present, but all there is a problem, what its principle was measured is varigrained number, then goes out varigrained coal dust percentage according to the density conversion of coal dust, and this kind of method exists a problem, the varigrained coal dust of same coal, its density is different, and ature of coal is poorer, and ash content is higher,, its difference is more obvious.Thus the in-line analyzer of this technology well cannot be applied in fuel-burning power plant.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, and propose a kind of on-line continuous fineness of pulverized coal analyzer and control method.
The present invention solves its technical matters and takes following technical scheme to realize:
A kind of on-line continuous fineness of pulverized coal analyzer, this analyzer comprises the coal dust sampler being arranged on left side and installing by sucking tube cell from top to bottom, sample pot, sample pot solenoid valve, 200 micron nominal sieves, 90 micron nominal sieves, at the bottom of standard sieve and sieve shaker, 200 micron nominal sieves, be connected with the weighing pot being arranged on right side respectively by going out powder inlet pipe at the bottom of 90 micron nominal sieves and standard sieve, the bottom of weighing pot is Weighing system, the top of weighing pot is provided with band row tube cell solenoid valve and must arranges tube cell, main control system respectively with coal dust sampler, sieve shaker, Weighing system and each solenoid valve connect.
And, be mounted with compressed-air power source in described coal dust sampler.
And, be provided with solenoid valve separately at the bottom of described 200 micron nominal sieves, 90 micron nominal sieves and standard sieve.
A control method for on-line continuous fineness of pulverized coal analyzer, method step is as follows:
(1), when starting working, main control system controls to open compressed-air power source in coal dust sampler, and the coal dust in suction tube cell is inhaled in sample pot under negative pressure;
(2) main control system controls to open sample pot solenoid valve, sieved entering under the effect in a certain amount of coal dust compressed-air power source in coal dust sampler by 200 micron nominal, 90 micron nominal sieve, at the bottom of standard sieve and the screening system that forms of sieve shaker, then main control system controls to open the solenoid valve sucking tube cell, and all the other coal dusts in sample pot are oppositely sucked away along sucking tube cell under negative pressure;
(3) main control system controls to start sieve shaker, stops after reaching the stipulated time;
(4) main control system controls the solenoid valve opening 200 micron nominal sieve connecting lines, under the effect in compressed-air power source, coal dust on sieve is sucked in the weighing pot of Weighing system along going out powder inlet pipe, Weighing system weighs, send data to main control system, then open row's tube cell solenoid valve on weighing pot top, under the suction function in compressed-air power source, coal dust is siphoned away along row's tube cell from weighing pot;
(5) main control system controls the solenoid valve opening 90 micron nominal sieve connecting lines, under the effect in compressed-air power source, coal dust on sieve is sucked in the weighing pot of Weighing system along going out powder inlet pipe, Weighing system weighs, send data to main control system, then open row's tube cell solenoid valve on weighing pot top, under the suction function in compressed-air power source, coal dust is siphoned away along row's tube cell from weighing pot;
(6) main control system controls the solenoid valve opening connecting line at the bottom of standard sieve, under the effect in compressed-air power source, coal dust on sieve is sucked in the weighing pot of Weighing system along going out powder inlet pipe, Weighing system weighs, send data to main control system, then open row's tube cell solenoid valve on weighing pot top, under the suction function in compressed-air power source, coal dust is siphoned away along row's tube cell from weighing pot;
(7) 3 data transmitting according to above-mentioned Weighing system of main control system, calculate fineness of pulverized coal value, then instantaneous transmission is to boiler of power plant control system, instructs boiler operatiopn.
Advantage of the present invention and good effect are:
1, the present invention integrates mature coal dust on-line period technology and existing laboratory fineness of pulverized coal determination techniques with main control system control technology, on-line period, screening, weighing are controlled by main control system, are that power source completes above-mentioned flow process with pressurized air, cost is low, fineness of pulverized coal measures and be consistent with national standard.
2, the sample pot of sampling system of the present invention is a back taper, is a solenoid valve that can be controlled by main control system above end mouth, and coal dust in tank can be flowed into the sieving machine of bottom by opens solenoid valve, and the time quantum of unlatching can determine the approximate weight of coal dust amount.
3, the switch of screening system of the present invention and sieving time are controlled by main control system.In screening system, coal dust controls opens solenoid valve by main control system, is under the effect of power source, is sucked in the weighing pot of Weighing system at pressurized air.
4, Weighing system of the present invention is weighed inhalation by main control system Systematical control, then controls opens solenoid valve by main control system;
5, in the present invention under pressurized air is the effect of power source, coal dust after having weighed in Weighing system is discharged system, main control system, according to the corresponding solenoid valve of sequential control at the bottom of 200 tm screen, 90 tm screen, bottom sieve and compressed air system, repeats the process of above-mentioned 4-5.
6, main control system program of the present invention is according to weighing data, calculates fineness of pulverized coal, result of calculation is uploaded to boiler implosion room.
7, main control system programmed control of the present invention is according to the needs of boiler operatiopn and pulverized coal preparation system, can set different online interval times.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Embodiment
Be further described the invention process below in conjunction with accompanying drawing, following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
A kind of on-line continuous fineness of pulverized coal analyzer, as shown in Figure 1, this analyzer comprises the coal dust sampler being arranged on left side and installing by sucking tube cell from top to bottom, sample pot, sample pot solenoid valve, 200 micron nominal sieves, 90 micron nominal sieves, at the bottom of standard sieve and sieve shaker, 200 micron nominal sieves, be connected with the weighing pot being arranged on right side respectively by going out powder inlet pipe at the bottom of 90 micron nominal sieves and standard sieve, the bottom of weighing pot is Weighing system, the top of weighing pot is provided with band row tube cell solenoid valve and must arranges tube cell, main control system respectively with coal dust sampler, sieve shaker, Weighing system and each solenoid valve connect, sequential control each several part works.
A control method for on-line continuous fineness of pulverized coal analyzer, its control method is as follows:
(1), when starting working, main control system controls to open compressed-air power source in coal dust sampler, and the coal dust in suction tube cell is inhaled in sample pot under negative pressure;
(2) main control system controls to open sample pot solenoid valve, sieved entering under the effect in a certain amount of coal dust compressed-air power source in coal dust sampler by 200 micron nominal, 90 micron nominal sieve, at the bottom of standard sieve and the screening system that forms of sieve shaker, then main control system controls to open the solenoid valve sucking tube cell, and all the other coal dusts in sample pot are oppositely sucked away along sucking tube cell under negative pressure;
(3) main control system controls to start sieve shaker, stops after reaching the stipulated time;
(4) main control system controls the solenoid valve opening 200 micron nominal sieve connecting lines, under the effect in compressed-air power source, coal dust on sieve is sucked in the weighing pot of Weighing system along going out powder inlet pipe, Weighing system weighs, send data to main control system, then open row's tube cell solenoid valve on weighing pot top, under the suction function in compressed-air power source, coal dust is siphoned away along row's tube cell from weighing pot;
(5) main control system controls the solenoid valve opening 90 micron nominal sieve connecting lines, under the effect in compressed-air power source, coal dust on sieve is sucked in the weighing pot of Weighing system along going out powder inlet pipe, Weighing system weighs, send data to main control system, then open row's tube cell solenoid valve on weighing pot top, under the suction function in compressed-air power source, coal dust is siphoned away along row's tube cell from weighing pot;
(6) main control system controls the solenoid valve opening connecting line at the bottom of standard sieve, under the effect in compressed-air power source, coal dust on sieve is sucked in the weighing pot of Weighing system along going out powder inlet pipe, Weighing system weighs, send data to main control system, then open row's tube cell solenoid valve on weighing pot top, under the suction function in compressed-air power source, coal dust is siphoned away along row's tube cell from weighing pot;
(7) 3 data transmitting according to above-mentioned Weighing system of main control system, calculate fineness of pulverized coal value, then instantaneous transmission is to boiler of power plant control system, instructs boiler operatiopn.
Claims (4)
1. an on-line continuous fineness of pulverized coal analyzer, it is characterized in that: this analyzer comprises the coal dust sampler being arranged on left side and installing by sucking tube cell from top to bottom, sample pot, sample pot solenoid valve, 200 micron nominal sieves, 90 micron nominal sieves, at the bottom of standard sieve and sieve shaker, 200 micron nominal sieves, be connected with the weighing pot being arranged on right side respectively by going out powder inlet pipe at the bottom of 90 micron nominal sieves and standard sieve, the bottom of weighing pot is Weighing system, the top of weighing pot is provided with band row tube cell solenoid valve and must arranges tube cell, main control system respectively with coal dust sampler, sieve shaker, Weighing system and each solenoid valve connect.
2. on-line continuous fineness of pulverized coal analyzer according to claim 1, is characterized in that: be mounted with compressed-air power source in described coal dust sampler.
3. on-line continuous fineness of pulverized coal analyzer according to claim 1, is characterized in that: be provided with solenoid valve separately at the bottom of described 200 micron nominal sieves, 90 micron nominal sieves and standard sieve.
4. a control method for on-line continuous fineness of pulverized coal analyzer, is characterized in that: method step is as follows:
(1), when starting working, main control system controls to open compressed-air power source in coal dust sampler, and the coal dust in suction tube cell is inhaled in sample pot under negative pressure;
(2) main control system controls to open sample pot solenoid valve, sieved entering under the effect in a certain amount of coal dust compressed-air power source in coal dust sampler by 200 micron nominal, 90 micron nominal sieve, at the bottom of standard sieve and the screening system that forms of sieve shaker, then main control system controls to open the solenoid valve sucking tube cell, and all the other coal dusts in sample pot are oppositely sucked away along sucking tube cell under negative pressure;
(3) main control system controls to start sieve shaker, stops after reaching the stipulated time;
(4) main control system controls the solenoid valve opening 200 micron nominal sieve connecting lines, under the effect in compressed-air power source, coal dust on sieve is sucked in the weighing pot of Weighing system along going out powder inlet pipe, Weighing system weighs, send data to main control system, then open row's tube cell solenoid valve on weighing pot top, under the suction function in compressed-air power source, coal dust is siphoned away along row's tube cell from weighing pot;
(5) main control system controls the solenoid valve opening 90 micron nominal sieve connecting lines, under the effect in compressed-air power source, coal dust on sieve is sucked in the weighing pot of Weighing system along going out powder inlet pipe, Weighing system weighs, send data to main control system, then open row's tube cell solenoid valve on weighing pot top, under the suction function in compressed-air power source, coal dust is siphoned away along row's tube cell from weighing pot;
(6) main control system controls the solenoid valve opening connecting line at the bottom of standard sieve, under the effect in compressed-air power source, coal dust on sieve is sucked in the weighing pot of Weighing system along going out powder inlet pipe, Weighing system weighs, send data to main control system, then open row's tube cell solenoid valve on weighing pot top, under the suction function in compressed-air power source, coal dust is siphoned away along row's tube cell from weighing pot;
(7) 3 data transmitting according to above-mentioned Weighing system of main control system, calculate fineness of pulverized coal value, then instantaneous transmission is to boiler of power plant control system, instructs boiler operatiopn.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109060615A (en) * | 2018-09-04 | 2018-12-21 | 四川重盟电力设备制造有限公司 | As-fired coal material partial size on-line analysis system |
| CN111272605A (en) * | 2020-04-09 | 2020-06-12 | 国网河北省电力有限公司电力科学研究院 | Drum-type pulverized coal fineness automatic measurement test device |
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2015
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Patent Citations (5)
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| JPH0394139A (en) * | 1989-04-28 | 1991-04-18 | Kawasaki Heavy Ind Ltd | Automatic measuring device for powder particle size |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109060615A (en) * | 2018-09-04 | 2018-12-21 | 四川重盟电力设备制造有限公司 | As-fired coal material partial size on-line analysis system |
| CN111272605A (en) * | 2020-04-09 | 2020-06-12 | 国网河北省电力有限公司电力科学研究院 | Drum-type pulverized coal fineness automatic measurement test device |
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