CN101021318B - New technique for solving the problem of middle-and small-size circulating fluidized bed boiler coking - Google Patents

New technique for solving the problem of middle-and small-size circulating fluidized bed boiler coking Download PDF

Info

Publication number
CN101021318B
CN101021318B CN2006100546586A CN200610054658A CN101021318B CN 101021318 B CN101021318 B CN 101021318B CN 2006100546586 A CN2006100546586 A CN 2006100546586A CN 200610054658 A CN200610054658 A CN 200610054658A CN 101021318 B CN101021318 B CN 101021318B
Authority
CN
China
Prior art keywords
air
dish valve
temperature
adjusting
air channel
Prior art date
Application number
CN2006100546586A
Other languages
Chinese (zh)
Other versions
CN101021318A (en
Inventor
唐广文
张永祥
Original Assignee
山东兖矿国际焦化有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 山东兖矿国际焦化有限公司 filed Critical 山东兖矿国际焦化有限公司
Priority to CN2006100546586A priority Critical patent/CN101021318B/en
Publication of CN101021318A publication Critical patent/CN101021318A/en
Application granted granted Critical
Publication of CN101021318B publication Critical patent/CN101021318B/en

Links

Abstract

The present invention relates to a method for solving coking problem of mid-small circulating fluidized-bed boilers. The method utilizes combustion principle to provide three conditions for combustion of combustible materials, namely, combustible material, combustion-supporting material and ignition temperature. It is characterized by that at the same time of reducing combustion-supporting material the ignition temperature is lowered, so that it can effectively solve the coking problem of circulating fluidized-bed boiler.

Description

A kind of method that solves the Small and Medium Circulating Fluidized Bed Boiler coking problem
Affiliated technical field:
The present invention relates to the operation problem of Small and Medium Circulating Fluidized Bed Boiler, especially incidental overtemperature coking problem aspect burning.
Background technology:
At present, recirculating fluidized bed is sent out boiler and is popularized in an all-round way in China's power industry and other industrial application.(refer to that evaporation capacity<220t/h) known its air and flue system flow process is: air is entered primary air fan, is entered air compartment by air preheater by the air channel for Small and Medium Circulating Fluidized Bed Boiler, enter burner hearth and fuel combustion through air distribution plate, become flue gas after the burning and pass through successively and extract out by air-introduced machine behind high temperature superheater, cyclone separator, low temperature superheater, economizer, air preheater and the deduster, send into chimney at last and enter in the atmosphere.According to relevant books record and I for many years practical operation find that this kind boiler causes part or whole ignition temperature to surpass the softening temperature of coal sometimes because of wind-coal proportioning is improper in operation, and then cause coking.After coking took place, boiler was forced to blowing out.Boiler just not only can not macrocyclicly move like this, but also increases operation and maintenance cost, and the refractory material to boiler when serious also can damage.
In order to solve CFBB incident coking problem in operation, the invention provides a kind of method, this method can not only fundamentally solve coking problem, and the controlling organization response speed can automatically perform again soon, simplifies the operation.
The technical solution adopted for the present invention to solve the technical problems is:
At the CFBB air and flue system promptly: in the flow process of air-air channel-primary air fan-air preheater-air compartment-air distribution plate-burner hearth-high temperature superheater-cyclone separator-low temperature superheater-economizer-air preheater-deduster-air-introduced machine-flue-chimney-atmosphere, between flue and air channel, set up a cross over pipe 7, and set up one in this cross over pipe inside and regulate dish valve B 10 and a coiled pipe water cooler 8, set up one in inside, air channel and regulate dish valve A 9, adjusting dish valve B 10 in the cross over pipe is normally closed, and the adjusting dish valve A 9 in the air channel often opens.Get two temperature points at the burner hearth emulsion zone and measure temperature value, and interlock with executing agency's formation of these two dish valves, the operating temperature of setting this mechanism is T.Adjusting dish valve B 10 during normal the operation in the cross over pipe is in closed condition, adjusting dish valve A 9 in the air channel is in full-gear, when the smaller in these two temperature values reaches the operating temperature T of setting, this executing agency opens the adjusting dish valve B 10 in the cross over pipe automatically, adjusting dish valve A 9 with inside, air channel closes simultaneously, that is: primary air fan becomes the suction flue gas by original suction air.After fire box temperature was less than the operating temperature T that sets, executing agency was automatically with dish valve cycle origin-location.
The principle that solves coking problem is: at first, the oxygen content when reducing the combustible burning utilizes the heat that coking place will take place the flue gas that is cooled off by the coiled pipe water cooler to take away simultaneously, reaches the purpose of cooling again.By the theory of combustion as can be known, the generation of burning need possess three conditions, that is: combustible, oxidizer, reach ignition temperature.The present invention starts with from two aspects that reduce oxidizer and reduction combustible temperature, fundamentally solves the circulating fluidized bed boiler coking problem.Secondly, have automatically, executing agency brings effective guarantee to solving the boiler coke problem fast.
The invention has the beneficial effects as follows:
Coking problem fundamentally is prevented, and this process do not influence operations staff's operation, reaches safety automation, and then can reduce the operation and maintenance cost of equipment again, ensures the boiler long-term operation.
Description of drawings:
The present invention is further described with enforcement below in conjunction with accompanying drawing.
Fig. 1 is CFBB air and flue system figure of the present invention.
Fig. 2 is instrument control principle figure.
Filled arrows among Fig. 1 and Fig. 2 is represented air flow, and hollow arrow is represented flue gas flow direction, and dotted line is represented the turnover cooling water pipeline of coiled pipe water cooler; TE-01 represents temperature detection No. 1, and TE-02 then represents temperature detection No. 2, and TE is the beginning letter of Temperature-Examine.
Little filled arrows among Fig. 2 is represented the transmission of instrument signal, DCS is the beginning letter abbreviations of Distributed-Control-System, that is: Distributed Control System, PID is the beginning letter abbreviations of Proportional-Integral-Derivative, that is: ratio, integration, differential.
1. high temperature superheaters among the figure, 2. air preheater, 3. cyclone separator, 4. economizer, 5. low temperature superheater, 6. chimney, 7. cross over pipe, 8. coiled pipe water cooler, 9. regulate dish valve A, 10. regulate dish valve B, 11. air-introduced machines, 12. dedusters, 13. primary air fan, 14. burner hearths, 15. emulsion zones, 16. air compartment, 17. air distribution plates, No. 18.1 temperature detection, 19.2 number temperature detection, 20. low value selectors, the 21.PID computing is regulated.
The specific embodiment:
By the theory of combustion as can be known, the generation of burning need possess three conditions, that is: combustible, oxidizer, reach ignition temperature.The present invention is exactly from reducing oxidizer, the oxygen content when promptly reducing the combustible burning and utilize the heat that coking place will take place circulating flue gas to take away, thereby two aspects of reduction combustible temperature start with, fundamentally solve the boiler coke problem.
At the CFBB air and flue system promptly: in the flow process of air-air channel-primary air fan 13-air preheater 2-air compartment 16-air distribution plate 17-burner hearth 14-high temperature superheater 1-cyclone separator 3-low temperature superheater 5-economizer 4-air preheater 2-deduster 12-air-introduced machine 11-flue-chimney 6-atmosphere, be exported to chimney 6 this section flue and air before from air-introduced machine 11 and between primary air fan 13 this section air channel before, set up a cross over pipe 7 (choosing circle when considering sealing problem usually), and this cross over pipe 7 inner with primary air fan 13 before this part inside, air channel set up coiled pipe water cooler 8 respectively and regulate dish valve B 10 and regulate dish valve A 9, for reducing the leaked-in air amount at this dish valve rotating shaft place encryption packing material.Get two temperature points at burner hearth emulsion zone 15 and measure temperature value, that is: No. 1 temperature detection 18 and No. 2 temperature detection 19, and in executing agency's formation interlocking of these two dish valves, the operating temperature of setting this mechanism is T (generally this value is less than the softening temperature of coal), and gets smaller in these two dynamic temperature values be as the criterion (because instrument when breaking down its measured value export its higher limit).Adjusting dish valve B 10 during normal the operation in the cross over pipe 7 are in closed condition, the adjusting dish valve A 9 of the inside, air channel before the primary air fan 13 is in full-gear, when the smaller in these two dynamic temperature values reaches the operating temperature T of setting, this executing agency opens the adjusting dish valve B 10 in the cross over pipe 7 automatically, adjusting dish valve A 9 with the inside, air channel of primary air fan 13 closes simultaneously, has so just finished primary air fan and has become the technology that sucks flue gas by original suction air and switch.After burner hearth emulsion zone temperature is less than the operating temperature T that sets, executing agency will regulate dish valve cycle origin-location accordingly.
Regulate dish valve events process: when boiler operatiopn, the temperature signal that No. 1 temperature detection 18 and No. 2 temperature detection 19 will record emulsion zone is delivered to and hang down choosing in the low value selector 20 and output signal is given PID computing adjusting 21, when the dynamic temperature when operation surpasses the operating temperature T that sets, the corresponding valve position signal of PID computing adjusting 21 outputs makes adjusting dish valve B 10 open, regulate dish valve A 9 and closes, after burner hearth emulsion zone temperature is less than the operating temperature T that sets, executing agency will regulate the original position of dish valve cycle accordingly.

Claims (1)

1. method that solves the Small and Medium Circulating Fluidized Bed Boiler coking problem, at the CFBB air and flue system promptly: in the flow process of air-air channel-primary air fan-air preheater-air compartment-air distribution plate-burner hearth-high temperature superheater-cyclone separator-low temperature superheater-economizer-air preheater-deduster-air-introduced machine-flue-chimney-atmosphere, between flue and air channel, set up a cross over pipe (7), and set up one in this cross over pipe inside and regulate a dish valve B (10) and a coiled pipe water cooler (8), set up one in inside, air channel and regulate dish valve A (9), adjusting dish valve B (10) in the cross over pipe is normally closed, adjusting dish valve A (9) in the air channel often opens, get two temperature points at the burner hearth emulsion zone and measure temperature value, and form interlocking with the executing agency of these two dish valves, the operating temperature of setting this mechanism is T, adjusting dish valve B (10) during normal the operation in the cross over pipe is in closed condition, adjusting dish valve A (9) in the air channel is in full-gear, when the smaller in these two temperature values reaches the operating temperature T of setting, this executing agency opens the adjusting dish valve B (10) in the cross over pipe automatically, adjusting dish valve A (9) with inside, air channel closes simultaneously, it is characterized in that: open and regulate dish valve B (10), after closing adjusting dish valve A (9), primary air fan can become the suction flue gas by original suction air.
CN2006100546586A 2006-02-16 2006-02-16 New technique for solving the problem of middle-and small-size circulating fluidized bed boiler coking CN101021318B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2006100546586A CN101021318B (en) 2006-02-16 2006-02-16 New technique for solving the problem of middle-and small-size circulating fluidized bed boiler coking

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2006100546586A CN101021318B (en) 2006-02-16 2006-02-16 New technique for solving the problem of middle-and small-size circulating fluidized bed boiler coking

Publications (2)

Publication Number Publication Date
CN101021318A CN101021318A (en) 2007-08-22
CN101021318B true CN101021318B (en) 2011-12-07

Family

ID=38709164

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2006100546586A CN101021318B (en) 2006-02-16 2006-02-16 New technique for solving the problem of middle-and small-size circulating fluidized bed boiler coking

Country Status (1)

Country Link
CN (1) CN101021318B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102042587B (en) * 2009-10-14 2012-09-19 财团法人工业技术研究院 Fluidized bed combustion furnace and control method thereof
CN101696799B (en) * 2009-10-31 2011-05-25 无锡华光工业锅炉有限公司 Device for preventing circulating fluidized bed boiler from coking
CN101943395A (en) * 2010-09-26 2011-01-12 安徽金鼎锅炉股份有限公司 Circulating fluidized bed boiler
CN102351553B (en) * 2011-07-25 2015-04-29 合肥科德电力表面技术有限公司 Water wall refractory belt anti-coking paint
CN102824845A (en) * 2012-09-13 2012-12-19 华北电力大学(保定) Method and system for utilizing white mud to remove mercury of biomass combustion boiler smoke
CN102913899B (en) * 2012-09-13 2015-12-02 浙江金锅锅炉有限公司 Recirculating fluidized bed steam, organic heat carrier, hot-air Three-in-one
CN106196032A (en) * 2016-08-31 2016-12-07 自贡华西能源工业有限公司 A kind of blowing system for CFB flue gas generation equipment
CN108386855B (en) * 2018-03-01 2019-09-20 浙江万凯新材料有限公司 A kind of deslagging device of boiler slag

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2165333Y (en) * 1993-06-30 1994-05-18 湘潭锅炉厂 Medium-pressure circulation fluidized-bed boiler
CN1566749A (en) * 2003-06-11 2005-01-19 上海锅炉厂有限公司 Method of fluidizing wind at high pressure using steam to replace air

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2165333Y (en) * 1993-06-30 1994-05-18 湘潭锅炉厂 Medium-pressure circulation fluidized-bed boiler
CN1566749A (en) * 2003-06-11 2005-01-19 上海锅炉厂有限公司 Method of fluidizing wind at high pressure using steam to replace air

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP昭58-200921A 1983.11.22

Also Published As

Publication number Publication date
CN101021318A (en) 2007-08-22

Similar Documents

Publication Publication Date Title
Jorapur et al. Sugarcane leaf-bagasse gasifiers for industrial heating applications
CN101438099B (en) A fluidized bed heat exchanger for a circulating fluidized bed boiler and a circulating fluidized bed boiler with a fluidized bed heat exchanger
KR920001094B1 (en) Method of buring solid fuel by means of a fluidized bed
RU2697555C2 (en) Improved combustion profiles for coke production
CN100350185C (en) Straw circulation fluidized-bed combustion boiler
CN102901212B (en) Low-range circulating fluidized bed water boiler for combusting inferior fuel and combustion method thereof
CN103923676B (en) HY type dry distillation furnace
CN101490213B (en) Method and device for the coking of high volatility coal
CN101655319B (en) System for regulating and optimizing smoke by power generation and recycle of residual heat of sintering ring cold machine
CN200975663Y (en) Circulating fluid bed boiler by burning biomass
CN100582197C (en) Circulating fluidized bed heat-power-gas-tar multi-joint-production apparatus and method
CN101949535B (en) Low-ratio biomass circulating fluidized bed boiler and combustion method thereof
CN104685027A (en) Coke plant including exhaust gas sharing
CN104685029A (en) Reduced output rate coke oven operation with gas sharing providing extended process cycle
CN102084184B (en) Method of controlling combustion in oxygen combustion boiler and apparatus therefor
CN103423869B (en) A kind of Horizontal type circulating fluid bed heat-conducting oil furnace
CN103133067A (en) Steel-mill residual blast-furnace gas and residual saturated steam comprehensive utilization power generation system
CN100498058C (en) Biomass fuel boiler
CN103644564B (en) A kind of two adjustable fluid flow wind transmission system of temperature resistance of CFBB
CN103363516B (en) A kind of CFBB with double reheat
FR2931816A1 (en) Clinker manufacturing process and cement clinker manufacturing plant
CN203784932U (en) Biomass boiler
CN107013906B (en) A kind of CFB Slag waste-heat recovery device
CN203259026U (en) Efficient sintering ore waste heat recovery and electricity generation device with griddle
CN202419628U (en) 300MW mixed-burning high furnace gas boiler

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
CB03 Change of inventor or designer information

Inventor after: Tang Guangwen

Inventor after: Zhang Yongxiang

Inventor before: Tang Guangwen

COR Change of bibliographic data

Free format text: CORRECT: INVENTOR; FROM: TANG GUANGWEN TO: TANG GUANGWEN ZHANG YONGXIANG

GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20111207

Termination date: 20130216

C17 Cessation of patent right