CN109442477A - A kind of plasma igniting test method applied to lignite - Google Patents
A kind of plasma igniting test method applied to lignite Download PDFInfo
- Publication number
- CN109442477A CN109442477A CN201811162539.1A CN201811162539A CN109442477A CN 109442477 A CN109442477 A CN 109442477A CN 201811162539 A CN201811162539 A CN 201811162539A CN 109442477 A CN109442477 A CN 109442477A
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- coal
- air fan
- plasma
- coal dust
- secondary air
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- 239000003077 lignite Substances 0.000 title claims abstract description 30
- 238000010998 test method Methods 0.000 title claims abstract description 15
- 239000003245 coal Substances 0.000 claims abstract description 46
- 239000002817 coal dust Substances 0.000 claims abstract description 40
- 239000000843 powder Substances 0.000 claims abstract description 35
- 239000000446 fuel Substances 0.000 claims abstract description 17
- 238000002485 combustion reaction Methods 0.000 claims abstract description 14
- 238000005303 weighing Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000000428 dust Substances 0.000 claims abstract description 4
- 238000005453 pelletization Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 27
- 238000006243 chemical reaction Methods 0.000 claims description 23
- 208000011580 syndromic disease Diseases 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 230000001915 proofreading effect Effects 0.000 claims description 3
- 102220131792 rs886046308 Human genes 0.000 claims description 3
- 235000019504 cigarettes Nutrition 0.000 claims 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 3
- 239000003546 flue gas Substances 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 7
- 238000010304 firing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 210000004894 snout Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q23/00—Testing of ignition installations
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
A kind of plasma igniting test method applied to lignite, lignite is ground through coal pulverizer first, it is sent after coal dust after grinding to collection powder cabin, coal dust in powder cabin will be collected using bucket elevator to send to powder cabin, then coal dust in powder cabin will be sent into coal, pulverulent fuel mixer after being weighed to powder weighing system according to external command by control batcher, it controls the coal dust that the hot wind after primary air fan preheats vapor heat exchanger carries in coal, pulverulent fuel mixer and enters plasma burner, using plasma gun to the coal powder ignition in plasma burner, finally secondary air combustion aid is carried out using secondary air fan, so that coal dust completely burned in the combustion chamber, the flue gas of generation is discharged with after dust pelletizing system through chimney air-introduced machine through cooling down.
Description
Technical field
The present invention relates to a kind of plasma igniting test methods applied to lignite.
Background technique
The power of Conventional plasma generally in 100~150kW or so, finding show when raw coal total moisture Mt >=
When 35%, when Conventional plasma is lighted a fire frequent appearance point not coal dust the case where, need to throw big oil gun auxiliary magnet in ignition process
Fire, power plant need to configure unload, store up, fuel feeding facility, cannot achieve the target for building oil-free power plant.In order to break through lignite plasma ignition
The insufficient bottleneck of energy is sought reliable high power plasma, and is organically combined with lignite igniting and pulverized coal preparation system, and realization is built
If the breach of the oil-free power plant of lignite plasma ignition.By to high powered plasma light the collected data of lignite test into
Row analysis and research, can to apply high powered plasma firing technique, the construction oil-free power plant of high water content brown coal, which makes, explicitly to be sentenced
It is disconnected, scientific basis is provided for the selection of power plant's ignition system, and propose for burner structure, the wind powder parameter etc. in Practical Project
Specify opinion.
Summary of the invention
Technology of the invention solves the problems, such as: overcome the deficiencies in the prior art, proposes a kind of plasma applied to lignite
Body fire trial method solves the problems, such as to be difficult to light high-moisture low heat value lignite using Plasma Firing Technology.
The technical solution of the invention is as follows: a kind of plasma igniting test method applied to lignite comprising such as
Lower step:
(1) lignite is ground through coal pulverizer, obtains sending after grain diameter meets the coal dust of particle requirement to collection powder cabin,
Coal dust in powder cabin will be collected using bucket elevator to send to powder cabin；
(2) control batcher will send coal dust in powder cabin according to external command after being weighed to powder weighing system
Enter coal, pulverulent fuel mixer；
(3) hot wind after control primary air fan preheats vapor heat exchanger carry the coal dust in coal, pulverulent fuel mixer enter etc. from
Sub- burner, using plasma gun to the coal powder ignition in plasma burner；
(4) secondary air combustion aid is carried out using secondary air fan, so that completely burned, air-introduced machine will generate coal dust in the combustion chamber
Flue gas be discharged through chimney through cooling down with after dust pelletizing system.
The proofreading method of the primary air fan, secondary air fan is as follows:
(1) start primary air fan, change primary air fan frequency conversion rotating speed, to coal dust free and have the coal, pulverulent fuel mixer of coal dust respectively
Primary air velocity carry out actual measurement so that cold conditions wind-warm syndrome next time fan frequency conversion frequency f in the coal, pulverulent fuel mixer of coal dust free
The relationship of wind speed v is v=0.55*f, and fan frequency conversion frequency f has together wind speed v in the coal, pulverulent fuel mixer of coal dust to hot wind-warm syndrome next time
Relationship be v=0.39*f；
(2) start secondary air fan, change secondary air fan frequency conversion rotating speed, real-time measurement is carried out to secondary air fan wind speed, is used
Right-angled intersection grid method calculates secondary air fan spout and is averaged secondary wind speed, determines secondary air fan conversion frequencies F with spout Secondary Air
The relationship of fast V are as follows: V=0.66*F.
The primary air fan frequency conversion rotating speed includes 35HZ, 40HZ, 45HZ, 50HZ；Secondary air fan frequency conversion rotating speed includes
15HZ、20HZ、25HZ、30HZ、35HZ。
The calculating secondary air fan spout be averaged secondary wind speed method using right-angled intersection grid method.
The plasma gun needs to add cooling water, compression sky in the process to the coal powder ignition in plasma burner
Gas.
The secondary air fan wind speed value range is 20~21m/s, and the minimum wind speed of primary air fan is 18m/s.
Meeting fineness of pulverized coal R90=30~35% of particle requirement in the step (1), coal dust moisture Mmf is 18~
19%.
Air temperature is 50 DEG C or so, and the temperature after vapor heat exchanger preheating is 85~100 DEG C, and speed is
18m/s。
The advantages of the present invention over the prior art are that:
(1) in present system, every given parameters and raw coal coal quality are organically combined, and can more really react actual condition
Under the conditions of pulverized coal ignition and combustion efficiency；
(2) in the method for the present invention, plasma gun power can be adjusted in 250~315kW, compare existing plasma gun,
Its power increases one times；
(3) in the method for the present invention, coal burner can effectively improve coal using heavy caliber, the frame mode of multistage combustion
Powder efficiency of combustion.
Detailed description of the invention
Fig. 1 is plasma lignite fire trial platform system schematic.
Specific embodiment
Overcome the deficiencies in the prior art of the present invention proposes a kind of plasma igniting test method applied to lignite, solution
It has determined and has been difficult the problem of lighting high-moisture low heat value lignite using Plasma Firing Technology, the corresponding test of test method of the present invention
Platform is built with single burner 1:1 ratio of 660MW pulverized-coal fired boiler, and collection powder processed gives powder, defeated powder, cold air heating, plasma burner
And spray gun, combustion chamber and air and gas system be in one, comprising vertical roll-type coal pulverizer and its frequency-conversion drive apparatus, pulverized-coal collector,
Bucket elevator, storage powder cabin, pulverizer coal feeder and Weighing device, duff pipe road, wind powder pipe road, primary air fan, secondary air fan, with
And steam warming machine duct heating system, electric-control system, compressed air system, cooling water system etc..
It is as shown in Figure 1 plasma lignite fire trial platform system schematic, a kind of plasma applied to lignite
Fire trial method, includes the following steps:
(1) lignite is ground through coal pulverizer, obtains sending after grain diameter meets the coal dust that certain granules require to collection
Powder cabin will collect coal dust in powder cabin using bucket elevator and send to powder cabin；
(2) control batcher will send coal dust in powder cabin according to external command after being weighed to powder weighing system
Enter coal, pulverulent fuel mixer；
(3) hot wind after control primary air fan preheats vapor heat exchanger carry the coal dust in coal, pulverulent fuel mixer enter etc. from
Sub- burner, using plasma gun to the coal powder ignition in plasma burner；
(4) secondary air combustion aid is carried out using secondary air fan, so that completely burned, air-introduced machine will generate coal dust in the combustion chamber
Flue gas be discharged through chimney through cooling down with after dust pelletizing system.
Primary air fan, the proofreading method of secondary air fan are as follows in the present invention:
(1) start primary air fan, change primary air fan frequency conversion rotating speed, to coal dust free and have the coal, pulverulent fuel mixer of coal dust respectively
Primary air velocity carry out actual measurement so that cold conditions wind-warm syndrome next time fan frequency conversion frequency f in the coal, pulverulent fuel mixer of coal dust free
The relationship of wind speed v is v=0.55*f, and fan frequency conversion frequency f has together wind speed v in the coal, pulverulent fuel mixer of coal dust to hot wind-warm syndrome next time
Relationship be v=0.39*f；
(2) start secondary air fan, change secondary air fan frequency conversion rotating speed, real-time measurement is carried out to secondary air fan wind speed, is used
Right-angled intersection grid method calculates secondary air fan spout and is averaged secondary wind speed, determines secondary air fan conversion frequencies F with spout Secondary Air
The relationship of fast V are as follows: V=0.66*F.
Primary air fan frequency conversion rotating speed includes 35HZ, 40HZ, 45HZ, 50HZ in the present invention；Secondary air fan frequency conversion rotating speed includes
15HZ,20HZ,25HZ,30HZ,35HZ.Calculate secondary air fan spout be averaged secondary wind speed method use right-angled intersection grid
Method.Plasma gun needs to add cooling water, compressed air to the coal powder ignition in plasma burner in the process.Secondary air fan
Wind speed value range is 20~21m/s, and the minimum wind speed of primary air fan is 18m/s.Primary wind pipe size in the method for the present invention
It is given by this practice of engineering design value；Primary and secondary air burner structure size and plasma are manufactured and designed by engineering 1:1.Combustion
Burner area of injection orifice 0.4931m2；Secondary air chamber area is 0.203m2；Pulverizer coal feeder power output is adjustable at 0~15 ton/hour or so；Examination
It tests lignite to grind in the existing vertical mill of testing stand, fineness of pulverized coal, coal dust moisture need to control (fineness of pulverized coal R90=according to design value
30~35% (R90 refer to coal dust by dedicated sieve screening after, the quality of pc remained in above sieve account for screening before coal dust it is total
The percentage of quality), coal dust moisture Mmf is 18~19%) (the coal dust final moisture that Mmf refers to coal pulverizer outlet), before test
Carry out assay；Wind-warm syndrome can be controlled by steam warming machine at 50 DEG C or so, a wind-warm syndrome can also be heated to 85~
100℃；Minimum primary air velocity control is tentatively set to 18m/s using not plugging as principle in ignition process；Because testing stand is middle storage formula
System, heat of the moisture evaporated in direct-firing system in raw coal grinding process absorbed in ignition process is by increasing test
In primary air flow conversion；In addition, this partial moisture is in primary air piping, equivalent to increase practical primary air velocity.More to fill
Divide simulation boiler actual ignition operating condition, the upper and lower tested in an existing wind snout adds overfire air port.Secondary Air spray
Mouth size is designed by practical overfire air port size 1:1；Add a centrifugal secondary air fan.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
Claims (8)
1. a kind of plasma igniting test method applied to lignite, it is characterised in that include the following steps:
(1) lignite is ground through coal pulverizer, obtains sending after grain diameter meets the coal dust of particle requirement to collection powder cabin, uses
Bucket elevator will collect coal dust in powder cabin and send to powder cabin；
(2) coal dust in powder cabin will be sent into coal after being weighed to powder weighing system according to external command by control batcher
Powder mixer；
(3) hot wind after control primary air fan preheats vapor heat exchanger carries the coal dust in coal, pulverulent fuel mixer and enters plasma combustion
Burner, using plasma gun to the coal powder ignition in plasma burner；
(4) secondary air combustion aid is carried out using secondary air fan, so that coal dust completely burned in the combustion chamber, air-introduced machine is by the cigarette of generation
Gas is discharged with after dust pelletizing system through chimney through cooling down.
2. a kind of plasma igniting test method applied to lignite according to claim 1, it is characterised in that: described
Primary air fan, the proofreading method of secondary air fan it is as follows:
(1) start primary air fan, change primary air fan frequency conversion rotating speed, respectively to the one of coal dust free and the coal, pulverulent fuel mixer for having coal dust
Secondary wind speed carries out actual measurement so that cold conditions wind-warm syndrome next time fan frequency conversion frequency f with wind speed v in the coal, pulverulent fuel mixer of coal dust free
Relationship be v=0.55*f, hot wind-warm syndrome next time fan frequency conversion frequency f with there is the pass of wind speed v in the coal, pulverulent fuel mixer of coal dust
System is v=0.39*f；
(2) start secondary air fan, change secondary air fan frequency conversion rotating speed, real-time measurement is carried out to secondary air fan wind speed, using cross
Intersect gridding method and calculate secondary air fan spout and be averaged secondary wind speed, determines secondary air fan conversion frequencies F with spout secondary wind speed V's
Relationship are as follows: V=0.66*F.
3. a kind of plasma igniting test method applied to lignite according to claim 2, it is characterised in that: described
Primary air fan frequency conversion rotating speed include 35HZ, 40HZ, 45HZ, 50HZ；Secondary air fan frequency conversion rotating speed include 15HZ, 20HZ, 25HZ,
30HZ、35HZ。
4. a kind of plasma igniting test method applied to lignite according to claim 2, it is characterised in that: described
Calculating secondary air fan spout be averaged secondary wind speed method using right-angled intersection grid method.
5. a kind of plasma igniting test method applied to lignite according to claim 1 or 2, it is characterised in that:
The plasma gun needs to add cooling water, compressed air to the coal powder ignition in plasma burner in the process.
6. a kind of plasma igniting test method applied to lignite according to claim 1 or 2, it is characterised in that:
The secondary air fan wind speed value range is 20~21m/s, and the minimum wind speed of primary air fan is 18m/s.
7. a kind of plasma igniting test method applied to lignite according to claim 1 or 2, it is characterised in that:
Meet fineness of pulverized coal R90=30~35% of particle requirement in the step (1), coal dust moisture Mmf is 18~19%.
8. a kind of plasma igniting test method applied to lignite according to claim 1 or 2, it is characterised in that:
Air temperature is 50 DEG C or so, and the temperature after vapor heat exchanger preheating is 85~100 DEG C, speed 18m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811162539.1A CN109442477B (en) | 2018-09-30 | 2018-09-30 | Plasma ignition test method applied to lignite |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811162539.1A CN109442477B (en) | 2018-09-30 | 2018-09-30 | Plasma ignition test method applied to lignite |
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| Publication Number | Publication Date |
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| CN109442477A true CN109442477A (en) | 2019-03-08 |
| CN109442477B CN109442477B (en) | 2020-09-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111642050A (en) * | 2020-06-08 | 2020-09-08 | 江苏帕斯玛环境科技有限公司 | Steam plasma generating system and monitoring system thereof |
| CN112283735A (en) * | 2020-11-19 | 2021-01-29 | 西安热工研究院有限公司 | A concentrate powder process system for high moisture brown coal kind of coal |
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| CN2338633Y (en) * | 1998-10-07 | 1999-09-15 | 宝鸡电力设备厂 | Plasma coal powder boiler igiter |
| CN102032592A (en) * | 2009-09-27 | 2011-04-27 | 烟台龙源电力技术股份有限公司 | Coal dust ignition system and control method thereof |
| CN104728864A (en) * | 2015-04-09 | 2015-06-24 | 航天神洁（北京）环保科技有限公司 | High-power adjustable plasma ignition test bed system for pulverized coal boiler |
-
2018
- 2018-09-30 CN CN201811162539.1A patent/CN109442477B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4871307A (en) * | 1988-11-02 | 1989-10-03 | Harris George W | Flame ignition and monitoring system and method |
| CN2338633Y (en) * | 1998-10-07 | 1999-09-15 | 宝鸡电力设备厂 | Plasma coal powder boiler igiter |
| CN102032592A (en) * | 2009-09-27 | 2011-04-27 | 烟台龙源电力技术股份有限公司 | Coal dust ignition system and control method thereof |
| CN104728864A (en) * | 2015-04-09 | 2015-06-24 | 航天神洁（北京）环保科技有限公司 | High-power adjustable plasma ignition test bed system for pulverized coal boiler |
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| Title |
|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111642050A (en) * | 2020-06-08 | 2020-09-08 | 江苏帕斯玛环境科技有限公司 | Steam plasma generating system and monitoring system thereof |
| CN112283735A (en) * | 2020-11-19 | 2021-01-29 | 西安热工研究院有限公司 | A concentrate powder process system for high moisture brown coal kind of coal |
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| CN109442477B (en) | 2020-09-18 |
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