CN106369597A - Control method for CFB flue gas generating equipment - Google Patents
Control method for CFB flue gas generating equipment Download PDFInfo
- Publication number
- CN106369597A CN106369597A CN201610764089.8A CN201610764089A CN106369597A CN 106369597 A CN106369597 A CN 106369597A CN 201610764089 A CN201610764089 A CN 201610764089A CN 106369597 A CN106369597 A CN 106369597A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- burner hearth
- cfb
- bed
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/28—Control devices specially adapted for fluidised bed, combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/20—Inlets for fluidisation air, e.g. grids; Bottoms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2202/00—Fluegas recirculation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2206/00—Fluidised bed combustion
- F23C2206/10—Circulating fluidised bed
Abstract
The invention discloses a control method for CFB flue gas generating equipment. The control method for the CFB flue gas generating equipment includes the steps that filling of a bed material is performed; combustible gas in the CFB flue gas generating equipment is discharged out; oil burners on the two sides of a combustion chamber are started; primary air enters from a constant-pressure air chamber, and the bed material is made to be in a critical boiling state; the bed material is heated by heat generated by the oil burners; solid particles are spread in the combustion chamber, the primary air is introduced, the solid particulate matter in the stationary state is made to be fluidized, high-temperature clean flue gas is introduced as secondary air, the amount of inert gas introduced into a dense phase zone and an air hose is adjusted, and the temperature in the combustion chamber is controlled within the range of 800-900 DEG C; and the high-temperature clean flue gas is introduced into the constant-pressure air chamber as re-circulating flue gas. The control method for the CFB flue gas generating equipment has the beneficial effects that high-temperature coking of fuel in the combustion chamber is prevented; the flue gas temperature of the CFB flue gas generating equipment can be accurately controlled; explosion of the CFB generating equipment can be avoided; and carbon particles which are not burnt out and the clean high-temperature flue gas are reused, and therefore the heat efficiency is improved.
Description
Technical field
The present invention relates to a kind of control method that equipment occurs for cfb flue gas, equipment is occurred to join with corresponding cfb flue gas
Set uses, and belongs to technical field of combustion equipment.
Background technology
At present, the similar devices of domestic operation are all smaller, and its capacity is typically in below 20mw.Its type of furnace has: chain furnace
The forms such as row, coal-powder boiler, ebullated bed, bubbling bed.The equipment of traveling-grate stoker form, fire grate causes imperfect combustion because of leakage coal,
Heat loss is big, and the thermal efficiency is relatively low.The equipment of coal-powder boiler form, flying dust is difficult to collect, and flue gas quality is difficult to ensure that, and flouring technology
Complexity, energy consumption is higher.The cfb equipment of ebullated bed form, using heavy boiler setting, outside Rhizoma Begoniae Willsonii is built into, and the easy bulge of furnace wall, opens
Split and collapse, and furnace wall is subject to limitation in height, general height is less than 15m.The equipment of bubbling bed form, its velocity of flue gas is low, bed
Face area is greatly it is difficult to maximize.Therefore, the applicant proposes a kind of new cfb flue gas and equipment and and coordinative composition of equipments occurs
Control method.
Content of the invention
The goal of the invention of the present invention is: for above-mentioned problem, provides a kind of new cfb flue gas that equipment occurs
And the control method with coordinative composition of equipments.
Cfb flue gas provided by the present invention occurs equipment concrete technical scheme to be such that
There is equipment in a kind of cfb flue gas, as shown in figure 1, including burner hearth, heat-insulating flue gas rotary separator 2, rear vertical shaft 3
With material returning device 4, described heat-insulating flue gas rotary separator 2 upper end is connected with burner hearth upper end by transition flue duct, described exhausted
Heat fume rotary separator 2 lower end is installed material returning device 4 and the solid particulate matter isolated is led back burner hearth, and water is passed through in upper end
Flat flue is connected with rear vertical shaft 3 top.
Described burner hearth is divided into isobaric air compartment 11, emulsion zone 12, dilute-phase zone 13, described material returning device 4 from top to bottom
Solid particulate matter is led back the emulsion zone 12 of burner hearth, described emulsion zone 12 rear portion arranges charging gear 5.Described emulsion zone 12
Collectively constitute the combustor of burner hearth with dilute-phase zone 13.Described equipressure air compartment 11 is connected with a blast pipe.Described combustion furnace
Thorax outer wall is connected with some tracheas 6.Each trachea 6 or be passed through noble gases, or it is passed through the flue gas after isolation of purified as two
Secondary wind is reused.
Described equipressure air compartment 11 top setting air distribution plate and blast cap.In isobaric air compartment 11, air distribution plate and blast cap are installed, can protect
The aperture wind speed demonstrate,proving all blast caps is essentially identical, is conducive to fuel to be uniformly distributed it is ensured that burning in the emulsion zone 12 of burner hearth
In burner hearth, thermo parameters method is reasonable.
The high ash flue gas of high temperature tangentially enters inside its straight section simultaneously along the gas approach of heat-insulating flue gas rotary separator 2
Produce rotation along inner arc, by high-speed rotation, under the influence of centrifugal force, uncombusted solid particulate matter is captured and deposits to down
The cone section in face, and the high-temperature cleaning flue gas after purifying enters the central tube in straight section and then discharges through exhaust pass.
Described material returning device 4 includes standpipe, returning charge valve body and refeed line, and described returning charge valve body is arranged on riser bottom, described
The some blast caps with ft connection of returning charge body base arrangement, described refeed line is connected with returning charge valve body-side, and the two connection
Place is higher than blast cap height.In returning charge valve body, spray high velocity air into returning charge valve body using blast cap, the solid that disturbance is collected
Grain thing reaches fluidized state, so as to effectively prevent from causing flue gas short circuit because piling up too many, safe and reliable.Refeed line
Junction is higher than blast cap height, when the solid particulate matter in returning charge valve body is higher than refeed line position, then uniformly, continuously, stably
Ground flows out and sends cfb flue gas back to from refeed line and occurs the burning of equipment indoor.
The beneficial effect of present device is:
1. adopt heat-insulating flue gas rotary separator to separate the uncombusted solid particulate matter in high-temperature flue gas, thus obtaining clear
Clean high-temperature flue gas.
2. unburnt solid particulate matter is transmitted back to burner hearth and burns again by material returning device, improves the after-flame of fuel
Degree and the efficiency of combustion of cfb equipment.
A kind of control method that equipment occurs for above-mentioned cfb flue gas, comprises the following steps:
The first step, fills bed, lays bed material on the air distribution plate of isobaric air compartment and in the returning charge valve body of material returning device；
Second step, the fuel gas in each pipeline and burner hearth in cfb flue gas generation equipment is all discharged；
3rd step, starts the oil burner of combustor both sides；
4th step, enters First air from isobaric air compartment, makes bed be in critical boiling state；
5th step, the heat bed being produced with oil burner；
6th step, sows solid fuel by charging gear to the burning interior of burner hearth, is passed through one from isobaric air compartment simultaneously
Secondary wind, makes the solid particulate matter in resting state reach fluidized state, the portion that heat-insulating flue gas rotary separator is separated
Airduct as cooling medium from burner hearth for the high temperature clean flue gas is divided to introduce, by the indoor temperature control of burning in 800-
900 degree Celsius range；By adjusting the amount of inert gas of emulsion zone and airduct introducing, in combustor, bed temperature is maintained at the most at last
800-900 degree Celsius；
7th step, using from rear vertical shaft, out and the high temperature clean flue gas through industrial application lead back isobaric wind as flue gas recycled
Room.
By above-mentioned seven steps, above-mentioned cfb flue gas can be occurred equipment from cold start and continuous service.
To occur equipment to carry out normal blowing out above-mentioned cfb flue gas, then follow the steps below:
8th step, burner hearth is minimized steady load and is maintained, and makes burner hearth and the rotation point of heat-insulating flue gas
Gradually cool down from device；
9th step, stops charging gear being continued in supply solid fuel；
Tenth step, after in charging gear, solid fuel has been sowed, burner hearth gradually stops working, and the oxygen amount in burner hearth starts to increase
Greatly, stop sending First air from isobaric air compartment；
11st step, excludes bed, continues through airduct and charging gear simultaneously and burner hearth is blown with purging so as to cool down；
12nd step, stops burner hearth being blown.
If in furnace shutting down process, burner hearth does not also cool down completely, needs to occur equipment to carry out hot opening cfb flue gas again
Dynamic, then directly the 11st step and the 12nd step are changed over herein below:
In the 11st step, if desired carry out thermal starting in burner hearth cooling procedure, then no longer carry out the 12nd step, but weight
New filling bed, charging gear continues to sow solid fuel, starts the oil burner of combustor both sides, two being introduced using airduct
Secondary wind heats to burner hearth, then, then starts to send First air from isobaric air compartment.
In sum, due to employing technique scheme, the invention has the beneficial effects as follows:
1st, prevent fuel in the indoor high-temperature coking of burning；
2nd, secondary wind, noble gases are introduced by each airduct, precise control cfb occurs the flue-gas temperature of equipment；
3rd, the first fuel gas in removing equipment before starting, it is to avoid cfb occurs equipment to explode；
4th, solid particulate matter is separated re-using, the clean high-temperature flue gas separated are introduced burning also by airduct
Reuse in burner hearth, thus improving the thermal efficiency that cfb flue gas occurs equipment；
5th, during normal blowing out, first load down, then reduce coal grain supply and so that it is stopped working, then cut off First air thus reducing oxygen supply, so
After so that it is slowly cooled down, safe operation, reliability, in order, the service life that cfb flue gas occurs equipment can be extended；
6th, during hot starting, hot start, make full use of secondary wind, to reduce heat loss.
Brief description
Fig. 1 is the structural representation that cfb flue gas involved in the present invention occurs equipment.
In figure labelling: 11 is isobaric air compartment, and 12 is emulsion zone, and 13 is dilute-phase zone, and 2 is heat-insulating flue gas rotary separator, 3
For rear vertical shaft, 4 is material returning device, and 5 is charging gear.
Specific embodiment
Embodiment 1:
A kind of control method that equipment occurs for above-mentioned cfb flue gas, including two large divisions, i.e. cold start, normal blowing out, heat
State starts.
Part I is the step of cold start:
The first step, fills bed, lays bed material on the air distribution plate of isobaric air compartment and in the returning charge valve body of material returning device.
Second step, the fuel gas in each pipeline and burner hearth in cfb flue gas generation equipment is all discharged.Can
The purpose that combustion gas body is discharged is to avoid accidental explosion accident as far as possible.
3rd step, starts the oil burner of combustor both sides.
4th step, enters First air from isobaric air compartment, makes bed be in critical boiling state.
5th step, the heat bed being produced with oil burner.
6th step, when the chamber temperature of burner hearth reaches 750 degrees Celsius, by charging gear to burner hearth
Solid fuel is sowed in burning interior, is passed through First air from isobaric air compartment simultaneously, makes the solid particulate matter in resting state reach stream
Change state, the part high temperature clean flue gas that heat-insulating flue gas rotary separator is separated are as cooling medium from burner hearth
Outer airduct introduces, by the indoor temperature control of burning in 800-900 degree Celsius range；Introduced by adjusting emulsion zone and airduct
Amount of inert gas, in combustor, bed temperature is also maintained at 800-900 degree Celsius the most at last, to prevent bed temperature too high and coking.Combustion
The exit gas temperature burning room also will maintain 800-900 degree Celsius range.
Part II is the step of normal blowing out:
8th step, burner hearth is minimized steady load and is maintained, and makes burner hearth and the rotation point of heat-insulating flue gas
Gradually cool down from device.
9th step, stops charging gear being continued in supply solid fuel.
Tenth step, after in charging gear, solid fuel has been sowed, burner hearth gradually stops working, and the oxygen amount in burner hearth is opened
Begin to increase, stop sending First air from isobaric air compartment.
11st step, excludes bed, continues through airduct and charging gear simultaneously and blows purging so as to cold to burner hearth
But.
12nd step, stops burner hearth being blown.
Embodiment 2:
A kind of control method that equipment occurs for above-mentioned cfb flue gas, including three parts, i.e. cold start, normal blowing out, heat
State starts.
Part I is the step of cold start:
The first step, fills bed, lays bed material on the air distribution plate of isobaric air compartment and in the returning charge valve body of material returning device.
Second step, the fuel gas in each pipeline and burner hearth in cfb flue gas generation equipment is all discharged.Can
The purpose that combustion gas body is discharged is to avoid accidental explosion accident as far as possible.
3rd step, starts the oil burner of combustor both sides.
4th step, enters First air from isobaric air compartment, makes bed be in critical boiling state.
5th step, the heat bed being produced with oil burner.
6th step, when the chamber temperature of burner hearth reaches 750 degrees Celsius, by charging gear to burner hearth
Solid fuel is sowed in burning interior, is passed through First air from isobaric air compartment simultaneously, makes the solid particulate matter in resting state reach stream
Change state, the part high temperature clean flue gas that heat-insulating flue gas rotary separator is separated are as secondary wind from burner hearth
Airduct introduce, by temperature control indoor for burning in 800-900 degree Celsius range；Introduced by regulation emulsion zone and airduct
Amount of inert gas, in combustor, bed temperature is also maintained at 800-900 degree Celsius the most at last, to prevent bed temperature too high and coking.Burning
The exit gas temperature of room also will maintain 800-900 degree Celsius range.
7th step, using from rear vertical shaft, out and the high temperature clean flue gas through industrial application lead back as flue gas recycled
Pressure air compartment, to avoid wasted heat, thus improving the thermal efficiency of whole equipment, can save fuel consumption.
Part II is the step of normal blowing out:
8th step, burner hearth is minimized steady load and is maintained, and makes burner hearth and the rotation point of heat-insulating flue gas
Gradually cool down from device.
9th step, stops charging gear being continued in supply solid fuel.
Tenth step, after in charging gear, solid fuel has been sowed, burner hearth gradually stops working, and the oxygen amount in burner hearth is opened
Begin to increase, stop sending First air from isobaric air compartment.
Part III is the step of hot starting, hot start:
11st step, refills bed, and charging gear continues to sow solid fuel, starts the oil burner of combustor both sides,
Using the secondary wind that airduct introduces, burner hearth is heated, then, then start to send First air from isobaric air compartment.Due in heat
In start-up course, need to re-establish air quantity, bed temperature can be led to decline rapidly, therefore select first to supply secondary wind, then supply First air,
So that heat loss is minimized.This measure is very useful for energy-saving and emission-reduction, reduces cost.
Claims (3)
1. a kind of control method for cfb flue gas generation equipment is it is characterised in that comprise the following steps:
The first step, fills bed, lays bed material on the air distribution plate of isobaric air compartment and in the returning charge valve body of material returning device；
Second step, the fuel gas in each pipeline and burner hearth in cfb flue gas generation equipment is all discharged；
3rd step, starts the oil burner of combustor both sides；
4th step, enters First air from isobaric air compartment, makes bed be in critical boiling state；
5th step, the heat bed being produced with oil burner；
6th step, sows solid fuel by charging gear to the burning interior of burner hearth, is passed through one from isobaric air compartment simultaneously
Secondary wind, makes the solid particulate matter in resting state reach fluidized state, the portion that heat-insulating flue gas rotary separator is separated
Divide high temperature clean flue gas as cooling medium, the airduct from burner hearth introduces, and exists for the temperature control that burning is indoor
800-900 degree Celsius range；By adjusting the amount of inert gas of emulsion zone and airduct introducing, in combustor, bed temperature keeps the most at last
At 800-900 degree Celsius；
7th step, using from rear vertical shaft, out and the high temperature clean flue gas through industrial application lead back isobaric wind as flue gas recycled
Room.
2. according to claim 1 a kind of for cfb flue gas occur equipment control method it is characterised in that:
8th step, burner hearth is minimized steady load and is maintained, and makes burner hearth and the rotation point of heat-insulating flue gas
Gradually cool down from device；
9th step, stops charging gear being continued in supply solid fuel；
Tenth step, after in charging gear, solid fuel has been sowed, burner hearth gradually stops working, and the oxygen amount in burner hearth starts to increase
Greatly, stop sending First air from isobaric air compartment；
11st step, excludes bed, continues through airduct and charging gear simultaneously and burner hearth is blown with purging so as to cool down；
12nd step, stops burner hearth being blown.
3. according to claim 2 a kind of for cfb flue gas occur equipment control method it is characterised in that:
In the 11st step, if desired carry out thermal starting in burner hearth cooling procedure, then no longer carry out the 12nd step, but weight
New filling bed, charging gear continues to sow coal grain, starts the oil burner of combustor both sides, the secondary wind being introduced using airduct
Burner hearth is heated, then, then starts to send First air from isobaric air compartment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610764089.8A CN106369597A (en) | 2016-08-31 | 2016-08-31 | Control method for CFB flue gas generating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610764089.8A CN106369597A (en) | 2016-08-31 | 2016-08-31 | Control method for CFB flue gas generating equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106369597A true CN106369597A (en) | 2017-02-01 |
Family
ID=57902116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610764089.8A Pending CN106369597A (en) | 2016-08-31 | 2016-08-31 | Control method for CFB flue gas generating equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678787A (en) * | 2017-02-08 | 2017-05-17 | 国家电投集团江西电力有限公司分宜发电厂 | Banked fire protection method and system |
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| CN1959208A (en) * | 2006-11-09 | 2007-05-09 | 华中科技大学 | Boiler system of circulating fluid bed burning in oxygen enrichment |
| CN101725965A (en) * | 2008-10-21 | 2010-06-09 | 神华集团有限责任公司 | High-temperature fume furnace of circulating fluidized bed and control method thereof |
| CN102818263A (en) * | 2012-09-19 | 2012-12-12 | 辽宁调兵山煤矸石发电有限责任公司 | Cold start method for circulating fluidized bed boiler |
| CN103742899A (en) * | 2014-01-23 | 2014-04-23 | 上海锅炉厂有限公司 | Oxygen-enriched combustion circulating fluidized bed poly-generation system and process |
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2016
- 2016-08-31 CN CN201610764089.8A patent/CN106369597A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5069170A (en) * | 1990-03-01 | 1991-12-03 | Foster Wheeler Energy Corporation | Fluidized bed combustion system and method having an integral recycle heat exchanger with inlet and outlet chambers |
| CN1959208A (en) * | 2006-11-09 | 2007-05-09 | 华中科技大学 | Boiler system of circulating fluid bed burning in oxygen enrichment |
| CN101725965A (en) * | 2008-10-21 | 2010-06-09 | 神华集团有限责任公司 | High-temperature fume furnace of circulating fluidized bed and control method thereof |
| CN102818263A (en) * | 2012-09-19 | 2012-12-12 | 辽宁调兵山煤矸石发电有限责任公司 | Cold start method for circulating fluidized bed boiler |
| CN103742899A (en) * | 2014-01-23 | 2014-04-23 | 上海锅炉厂有限公司 | Oxygen-enriched combustion circulating fluidized bed poly-generation system and process |
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| 党黎军: "《循环流化床锅炉的启动调试与安全运行》", 31 August 2002, 中国电力出版社 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678787A (en) * | 2017-02-08 | 2017-05-17 | 国家电投集团江西电力有限公司分宜发电厂 | Banked fire protection method and system |
| CN106678787B (en) * | 2017-02-08 | 2019-02-15 | 国家电投集团江西电力有限公司分宜发电厂 | Banking fire guard method and system |
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Application publication date: 20170201 |