CN105135426A - Regulating method for material returning exception of circulating fluidized bed boiler - Google Patents
Regulating method for material returning exception of circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN105135426A CN105135426A CN201510565457.1A CN201510565457A CN105135426A CN 105135426 A CN105135426 A CN 105135426A CN 201510565457 A CN201510565457 A CN 201510565457A CN 105135426 A CN105135426 A CN 105135426A
- Authority
- CN
- China
- Prior art keywords
- material returning
- exception
- combustion chamber
- returning charge
- separator
- 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.)
- Withdrawn
Links
Abstract
The invention discloses a regulating method for a material returning exception of a circulating fluidized bed boiler which consists of a combustion chamber, a separator, a material returning vertical tube, a material returning valve and a tail flue. The combustion chamber, the separator, the material returning vertical tube and the material returning valve form a circulating loop. The material returning valve adopts a U-shaped structure. When an air-coal proportion is improper, namely, primary air quantity is greater than air quantity required corresponding to furnace coal quantity, a material returning exception (intermittent material returning) phenomenon is generated; during regulation, the primary air is properly reduced, rotation speed of a slag cooler is increased, slag discharge quantity is increased, and excessive materials in the combustion chamber are discharged; the regulation is repeatedly carried out until uniform material returning is achieved, so that bed-pressing accidents caused by the material returning exception are reduced, and the production safety is guaranteed; stability of main steam temperature and pressure is guaranteed, and service lives of high-temperature parts of a boiler and a steam turbine are prolonged; and furnace shut-down faults caused by high-temperature or low-temperature coking due to the material returning exception are reduced. The regulating method is simple to operate, and easy to popularize.
Description
Technical field
The present invention relates to a kind of method of adjustment of CFBB operation exception, particularly relate to a kind of method of adjustment of CFBB returning charge exception.
Background technology
The CFBB of Jin10Nian Lai China obtains and develops rapidly.But make a general survey of the ruuning situation of China's CFBB, fault rate is high, problem that the cycle of operation is shorter becomes universal phenomenon.Wherein material-returning device operation irregularity fault more frequently occurs, and it affects normal in stove operation, and time serious, necessary blowing out process, shortens the equipment cycle of operation, decrease service life of equipment.Therefore namely the method for this fault in the urgent need to address adjusts the measure of returning charge exception at present.
Summary of the invention
Object of this invention is as overcoming the above problems and a kind of method of adjustment of CFBB returning charge exception reducing fault rate, increase the equipment cycle of operation, increase service life of equipment of providing.
This operating process is achieved through the following technical solutions above-mentioned purpose.
CFBB is formed by combustion chamber, separator, vertical feed back pipe, returning charge valve and back-end ductwork.Described combustion chamber and separator, vertical feed back pipe, returning charge valve form a closed circuit.When wind coal proportion is improper, primary air flow is greater than the air quantity of furnace coal weight needs, first reduce primary air flow in right amount, increase slag cooler velocity of rotation, increase bed drain purge, discharge material unnecessary in combustion chamber.
Further:
Described returning charge valve adopts U-shaped structure.
Beneficial effect of the present invention is:
1. reduce and cause press accident because returning charge is abnormal, ensure production safety.
2. ensure the steady of main steam temperature and pressure, the service life of prolonged boiler, steam turbine high-temperature parts.
3. reduce the high temperature caused because returning charge is abnormal or bed clinkering fault and cause blowing out fault.
4. simple to operate, be easy to promote.
Accompanying drawing explanation
Fig. 1 is circulating fluid bed boiler structure schematic diagram.
In figure: 1, combustion chamber; 2, separator; 3, vertical feed back pipe; 4, returning charge valve; 5, back-end ductwork.
Specific implementation method
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1: form CFBB by combustion chamber 1, separator 2, vertical feed back pipe 3, returning charge valve 4 and back-end ductwork 5, described combustion chamber 1 forms a closed circuit with separator 2, vertical feed back pipe 3, returning charge valve 4.
First judge returning charge anomaly (i.e. interval returning charge) has occurred in boiler, at this moment ruuning situation in combustion chamber 1 is observed, ordinary circumstance is all wind coal proportion improper (namely primary air flow is greater than the air quantity of furnace coal weight needs at that time) and causes returning charge abnormal, reexamine front several classes of operational factors and main steam temperature simultaneously, pressure, bed temperature, bed pressure, the variation tendency of furnace pressure etc., just can judge the length of returning charge abnormal time, at this time just can take measures: first reduce First air (how suddenly having subtracted easy press) on a small quantity, suitable increase slag cooler velocity of rotation, increase bed drain purge, get rid of material unnecessary in combustion chamber, returning charge situation is examined in the process of deslagging, deslagging finds after several hours that the returning charge abnormal intermittent time shortens, to stable future development, now reduce First air in right amount again, suitable adjustment slag cooler rotating speed, continue to get rid of material unnecessary in combustion chamber 1, repeatedly adjust in this way, the intermittent time of returning charge exception is shorter and shorter, finally when material unnecessary in combustion chamber 1 is all discharged, and primary air flow is when dropping to flux matched with coal, at this moment returning charge is just uniform and stable.The time of returning charge exception is longer, adjusts to the stable time longer, sometimes adjusts 7-8 hour ability and tends to be steady gradually.Return in combustion chamber 1 when the steady Posterior circle material of returning charge is able to continuously, at this moment bed temperature, bed pressure, chamber pressure, main steam temperature and main steam pressure all tend towards stability value, make boiler even running, ensure that production safety.
Above-mentioned embodiment is preferred embodiment, and any amendment done within the spirit and principles in the present invention, equivalent replacement or improvement etc., all should be included within claims of the present invention.
Claims (2)
1. the method for adjustment of a CFBB returning charge exception, CFBB is formed by combustion chamber, separator, vertical feed back pipe, returning charge valve and back-end ductwork, described combustion chamber and separator, vertical feed back pipe, returning charge valve form a closed circuit, when primary air flow is not greater than the air quantity of furnace coal weight needs to wind coal proportion at once, first reduce primary air flow in right amount, increase slag cooler velocity of rotation, increase bed drain purge, discharge material unnecessary in combustion chamber.
2. the method for adjustment of CFBB returning charge exception according to claim 1, is characterized in that: described returning charge valve adopts U-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510565457.1A CN105135426A (en) | 2015-09-08 | 2015-09-08 | Regulating method for material returning exception of circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510565457.1A CN105135426A (en) | 2015-09-08 | 2015-09-08 | Regulating method for material returning exception of circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105135426A true CN105135426A (en) | 2015-12-09 |
Family
ID=54720880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510565457.1A Withdrawn CN105135426A (en) | 2015-09-08 | 2015-09-08 | Regulating method for material returning exception of circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105135426A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1258467A2 (en) * | 2001-05-17 | 2002-11-20 | Saria Bio-Industries GmbH & Co. Verwaltungs- und Beteiligungs-KG | Process for the preparation of phosphate-containing fertilizers |
| CN1959208A (en) * | 2006-11-09 | 2007-05-09 | 华中科技大学 | Boiler system of circulating fluid bed burning in oxygen enrichment |
| CN101329582A (en) * | 2008-07-18 | 2008-12-24 | 东南大学 | Method for optimizing and diagnosing circulating fluid bed boiler combustion |
| CN101995016A (en) * | 2010-10-19 | 2011-03-30 | 重庆大学 | Circulating fluidized bed boiler device using low calorific value coal gangue for post ignition |
| CN103453538A (en) * | 2013-08-06 | 2013-12-18 | 中国华能集团清洁能源技术研究院有限公司 | Ultra-low emission circulating fluidized bed boiler with three stages of desulfurization systems |
-
2015
- 2015-09-08 CN CN201510565457.1A patent/CN105135426A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1258467A2 (en) * | 2001-05-17 | 2002-11-20 | Saria Bio-Industries GmbH & Co. Verwaltungs- und Beteiligungs-KG | Process for the preparation of phosphate-containing fertilizers |
| CN1959208A (en) * | 2006-11-09 | 2007-05-09 | 华中科技大学 | Boiler system of circulating fluid bed burning in oxygen enrichment |
| CN101329582A (en) * | 2008-07-18 | 2008-12-24 | 东南大学 | Method for optimizing and diagnosing circulating fluid bed boiler combustion |
| CN101995016A (en) * | 2010-10-19 | 2011-03-30 | 重庆大学 | Circulating fluidized bed boiler device using low calorific value coal gangue for post ignition |
| CN103453538A (en) * | 2013-08-06 | 2013-12-18 | 中国华能集团清洁能源技术研究院有限公司 | Ultra-low emission circulating fluidized bed boiler with three stages of desulfurization systems |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102226513B (en) | Fault optimizing control method of supercritical unit unilateral auxiliary engine | |
| CN109681907B (en) | Variable-load air-coal matching control device and method for coal-fired power plant boiler | |
| WO2019223489A1 (en) | Boiler load control system and control method for biomass boiler | |
| CN201787823U (en) | Heat-power balancing device for sintering waste heat generating system | |
| CN204008417U (en) | A kind of sectional temperature-controlled coal-burning boiler high temperature corrosion and Slagging Characteristics test unit | |
| CN103836607B (en) | Thermal power plant's SCR denitration reactor working temperature controller and control method thereof | |
| CN108119895A (en) | Waste heat boiler liquid level of steam drum control system | |
| CN107314395B (en) | The method of fast cutback under unit style generating set emergency situation | |
| JP6087226B2 (en) | Boiler control device | |
| CN105135426A (en) | Regulating method for material returning exception of circulating fluidized bed boiler | |
| KR102488142B1 (en) | Systems and methods for operating a combustion chamber | |
| CN104534442A (en) | Low mass flow speed ultra-supercritical boiler water circulation device and water circulation method | |
| CN103105243A (en) | Thermocouple temperature measuring device capable of monitoring temperature of boiler | |
| CN204455028U (en) | A kind of eddy flow chilling ring | |
| CN106123026A (en) | A kind of thermal power plant coal powder pipeline blocking method for early warning | |
| CN103277197B (en) | Gas turbine generating set low-calorific-value combustion control method | |
| CN103742270A (en) | Purging pipeline monitoring method of combustor | |
| CN104593533B (en) | The method of combustion blast furnace gas 300MW generating set low heat value operation | |
| CN105785065A (en) | Power station boiler wind speed on-line monitoring system and speed measuring method | |
| CN206160109U (en) | Novel U type returning charge ware air supply structure | |
| CN202994319U (en) | Boiler thermocouple temperature measuring device | |
| CN103822356A (en) | Energy-saving organic heat carrier dynamic heat energy intelligent distribution system | |
| CN103176456B (en) | A kind of coal slurry automatic tracking system | |
| CN109827169B (en) | Boiler low-temperature flue gas recirculation combustion system and application method thereof | |
| CN205332191U (en) | Circulating fluidized bed hood reinforcing means |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20151209 |
|
| WW01 | Invention patent application withdrawn after publication |