CN101464005B - Circulating fluidized bed boiler ignition apparatus and method thereof - Google Patents
Circulating fluidized bed boiler ignition apparatus and method thereof Download PDFInfo
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- CN101464005B CN101464005B CN2009101172038A CN200910117203A CN101464005B CN 101464005 B CN101464005 B CN 101464005B CN 2009101172038 A CN2009101172038 A CN 2009101172038A CN 200910117203 A CN200910117203 A CN 200910117203A CN 101464005 B CN101464005 B CN 101464005B
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- cfbb
- conveying device
- boiler
- red slag
- furnace apparatus
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Abstract
The invention relates to a circulating fluidized bed boiler ignition device and an ignition method thereof. The boiler ignition device comprises a circulating fluidized bed boiler, a cyclone separator and a material return device which is arranged below the cyclone separator. The boiler ignition device is characterized in that one end of a red slag conveying device is connected with a slag discharge pipe of the material return device and a discharge outlet through two pipelines, the other end thereof is connected with the slag discharge pipe of the material return device on the adjacent circulating fluidized bed boiler, and valves are respectively arranged on the pipelines at the two ends of the red slat conveying device. The device and the method connect the two boilers through the red slag conveying device between the two circulating fluidized bed boilers, then when in ignition of one boiler after the overhaul, red slag with the high temperature of 800-900 DEG C of the other boiler can be utilized for starting up the boiler, thereby saving a great amount of fuel. The invention has the advantages of simple structure, convenient use and ability of effectively reducing the startup cost of the boiler after the overhaul.
Description
Affiliated technical field
The present invention relates to a kind of CFBB point furnace apparatus and some stove method thereof.
Background technology
It is ripe that present large-size circulating fluidized bed technology has been tending towards, is mainly used in coal-fired thermal power generation.The basic procedure of CFBB is: after coal and desulfurizing agent are sent into burner hearth, surrounded by a large amount of inertia high-temperature materials rapidly, fire burns, carry out desulphurization reaction simultaneously, and under the effect of rising flue gas stream, move to upper furnace, to other heating surface heat releases of arranging in water-cooling wall and the stove.Oversize grain enters the back, zone that suspends and depart from primary air under gravity and external force effect, thereby adherent dirty.Gas-solid mixture enters high temperature cyclone separator after leaving burner hearth, and a large amount of solid particles as coal grain, the desulfurizing agent loopback burner hearth that is separated, carry out circulating combustion.The fine particle that is not separated enters back-end ductwork with flue gas, with heating superheater, economizer and air preheater, drains into atmosphere through deduster.Because CFBB is under the high velocity air state, carries out work, so just causes serious wear, need frequent shutdown maintenance.After each maintenance, all need a large amount of fuel oils the solid material in the boiler to be heated at the boiler startup initial stage, after the safety that makes the temperature of solid material can reach coal uses temperature, could throw coal and carry out operate as normal, how reducing the payment for initiation usefulness of maintenance back CFBB, is the target that each CFBB uses enterprise to pursue.
Summary of the invention
The present invention is with the isolated high temperature combustible of adjacent circulation fluidized-bed combustion boiler cyclone separator, introduces in the CFBB after overhauling, and this boiler is carried out the CFBB point furnace apparatus and the ignition method of heating starting.
For achieving the above object, technical scheme of the present invention is: a kind of CFBB point furnace apparatus, comprise CFBB, cyclone separator, standpipe and be installed in material returning device under the cyclone separator, an end that it is characterized in that red slag conveying device links to each other with discharging opening with the scum pipe of material returning device respectively by two bye-passes, the scum pipe of the material returning device on the other end and the adjacent CFBB links to each other with discharging opening, is separately installed with valve on the pipeline at red slag conveying device two ends.
Above-mentioned red slag conveying device is a Pneumatic conveyer.
On the carrier pipe in the above-mentioned Pneumatic conveyer expansion appliance is installed.
Above-mentioned red slag conveying device is scraping plate conveying device or bucket type conveying device.
The method of utilizing CFBB point furnace apparatus to light a fire, this method comprises: utilize the red slag of high temperature in the CFBB that red slag conveying device will normally move to be transported in the CFBB that needs ignition trigger, programming rate according to the boiler ignition start requirement, the red slag conveying capacity of control high temperature, after the temperature of CFBB reaches required firing temperature, stop the conveying of the red slag of high temperature, throw coal point stove and get final product.
Device of the present invention is between two CFBBs, by red slag conveying device two boilers are connected, when lighting a fire behind boiler maintenance so therein, can utilize the red slag of 800-900 ℃ of high temperature of another boiler, boiler after the maintenance is carried out heating starting, need not to use fuel oil to heat, can save a large amount of fuel oils.As overhauling 12 times in 470 tons CFBB year, when lighting a fire at every turn, generally need the light diesel more than 20 tons to carry out heating starting, and after adopting this device, just can save this part expense, about 1,200,000 yuan of year saving diesel oil expenses.This method and device have simple in structure, easy to use, can effectively reduce the start-up cost behind the boiler maintenance.
Description of drawings
Accompanying drawing 1 is a structural representation of the present invention.
The specific embodiment
As shown in Figure 1, the left side is the I CFBB, and the right side is the II CFBB.Every CFBB comprises cyclone separator 1, standpipe 2 and is installed in material returning device 5 under the cyclone separator.Be connected with red slag conveying device on the scum pipe 6 of two boiler material returning devices, 5 lower ends, this device is separately installed with valve for Pneumatic conveyer between this Pneumatic conveyer and the scum pipe 6.On the discharging opening 4 that material returning device and boiler are connected, be connected with the bye-pass that is communicated with Pneumatic conveyer respectively, on this bye-pass, be separately installed with valve.
When needing ignition trigger after the maintenance of I CFBB, valve I7, valve III11 are closed, valve II8 and valve IV12 open, this moment, the red slag of high temperature of II CFBB just passed through valve IV12, pneumatic carrier 10, bye-pass and the valve II8 on it, enter the discharging opening 4 of I CFBB material returning device, be inhaled in the burner hearth 3 then, boiler is heated.After the I CFBB reaches start-up temperature, valve-off II8 and valve IV12, the I CFBB is thrown coal and is normally moved.
When needing ignition trigger after the maintenance of II CFBB, valve I7, valve III11 are opened, valve II8 and valve IV12 close, and the red slag of high temperature is transported in the II CFBB by the I CFBB.
Above-mentioned Pneumatic conveyer comprises pneumatic carrier 10 and is installed in the high-pressure air hose 9 at pneumatic carrier two ends.The high-pressure blast of high-pressure air hose can utilize the wind regime in the steam generator system, as once or the secondary wind regime.
Red slag conveying device also can be utilized existing scraping plate conveying device or bucket type conveying device, its objective is the red slag of high temperature is carried between two boilers.
According to utilize fuel oil the boiler startup initial stage to the mature technology technology that the solid material in the boiler heats, utilize red slag to replace fuel oil, the other technologies condition is constant substantially, as programming rate etc.The red slag of high temperature in the CFBB of just normal operation, after the safety of utilizing conveying device to be transported to need the temperature that makes solid material in the CFBB of ignition trigger can reach coal uses temperature, stop the conveying of the red slag of high temperature, throw coal point stove and get final product.The red slag of high temperature conveying capacity hourly is determined according to the programming rate that boiler ignition start requires.As when 470 tons CFBB being carried out a some stove, what pneumatic carrier adopted is Φ 108 stainless steel tubes, in 4-6 hour, can carry the red slag of 100-300t in needs are put the boiler that stove starts, make the hott bed material temperature that adds in the boiler reach 60-70C °, possess the condition of throwing coal.
Claims (5)
1. CFBB point furnace apparatus, comprise CFBB, cyclone separator, standpipe and be installed in material returning device under the cyclone separator, an end that it is characterized in that red slag conveying device links to each other with discharging opening (4) with the scum pipe (6) of material returning device respectively by two bye-passes, the scum pipe of the material returning device on the other end and the adjacent CFBB links to each other with discharging opening, is separately installed with valve on the scum pipe of above-mentioned red slag conveying device two ends and material returning device and pipeline that discharging opening links to each other.
2. CFBB point furnace apparatus according to claim 1 is characterized in that above-mentioned red slag conveying device is a Pneumatic conveyer.
3. CFBB point furnace apparatus according to claim 2 is characterized in that on the carrier pipe in the above-mentioned Pneumatic conveyer expansion appliance being installed.
4. CFBB point furnace apparatus according to claim 1 is characterized in that above-mentioned red slag conveying device is scraping plate conveying device or bucket type conveying device.
5. the method for utilizing the described CFBB point furnace apparatus of claim 1 to light a fire, this method comprises: utilize the red slag of high temperature in the CFBB that red slag conveying device will normally move to be transported in the CFBB that needs ignition trigger, programming rate according to the boiler ignition start requirement, the red slag conveying capacity of control high temperature, after the temperature of CFBB reaches required firing temperature, stop the conveying of the red slag of high temperature, throw coal point stove and get final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101172038A CN101464005B (en) | 2009-01-14 | 2009-01-14 | Circulating fluidized bed boiler ignition apparatus and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101172038A CN101464005B (en) | 2009-01-14 | 2009-01-14 | Circulating fluidized bed boiler ignition apparatus and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101464005A CN101464005A (en) | 2009-06-24 |
| CN101464005B true CN101464005B (en) | 2010-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101172038A Expired - Fee Related CN101464005B (en) | 2009-01-14 | 2009-01-14 | Circulating fluidized bed boiler ignition apparatus and method thereof |
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| CN (1) | CN101464005B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499093B (en) * | 2013-09-26 | 2015-12-23 | 吉木萨尔县光源发电有限责任公司 | CFBB starting ignition method |
| CN105222151A (en) * | 2014-06-03 | 2016-01-06 | 国网山西省电力公司电力科学研究院 | The method of the hot Secondary Air heating furnace of adjacent stove and device |
| CN104214761B (en) * | 2014-09-09 | 2015-11-04 | 新疆天富能源股份有限公司 | Boiler point for power plant stops throwing with semi-dry desulphurization the operating procedure moved back |
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2009
- 2009-01-14 CN CN2009101172038A patent/CN101464005B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101464005A (en) | 2009-06-24 |
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