CN2515543Y - Material circulating device of cyclic fluidized bed boiler - Google Patents
Material circulating device of cyclic fluidized bed boiler Download PDFInfo
- Publication number
- CN2515543Y CN2515543Y CN 01274407 CN01274407U CN2515543Y CN 2515543 Y CN2515543 Y CN 2515543Y CN 01274407 CN01274407 CN 01274407 CN 01274407 U CN01274407 U CN 01274407U CN 2515543 Y CN2515543 Y CN 2515543Y
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- heat exchanger
- returning charge
- bed
- distribution plate
- air
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Abstract
The utility model relates to a material circulating device of a cyclic fluidized bed boiler. An external heat exchanger and a material returning mechanism in the material circulating device are arranged in an overlay method or an apposition mode. Moreover, the material returning mechanism is divided into a material charging chamber and a material returning chamber; the material charging chamber and the material discharging chamber are provided with aeration air and fluidized air. The external heat exchanger is divided into a material charging chamber and a fluidized bed heat-exchange bed; the material charging chamber and the fluidized bed heat-exchange bed are respectively provided with the aeration air and the fluidized air. The amount of the high temperature material entering into the material returning mechanism and the external heat exchanger is adjusted through the control of the amount of wind blown by the material returning mechanism and the external heat exchanger which are in operation. The traditional mechanical valve adjustment is replaced by the adjustment of the amount of air, which overcomes the problems of severe abrasion and high maintenance cost in the control of the mechanical valve, etc.
Description
Technical field
The utility model relates to the material circulation device of CFBB
Background technology
Combustion technology of circulating fluidized worldwide is used widely as clean combustion technology of new generation.Develop large circulating fluidized bed boiler forward large scale development at present.For solving the problem of the heating surface layout of bringing after CFBB maximizes, generally adopt at present the method for in the material closed circuit, arranging heating surface to solve, arrange external heat exchanger as Lurgi type CFBB, Fooster Wheeler company then adopts similar INTREX fluidized bed heat exchanger bed.The CFBB closed circuit of band external heat exchanger mainly comprises the separator (cyclone separator) of combustion chamber, solid particle and the material external circulating device that is made of returning charge mechanism and external heat exchanger.By regulating the ratio of recycle stock amount between returning charge mechanism and the external heat exchanger neatly, be in the best operating temperature and the control of steam temperature to guarantee the combustion chamber.The material circulation device of present CFBB is to adopt the mechanical valve involve great expense to control the high-temperature material amount that closed circuit enters external heat exchanger, because this mechanical valve long-term work is in hot environment, be easy to be worn, just must change about general half a year, this has just increased the operation and maintenance cost of boiler greatly.
Summary of the invention
The utility model is the safety in operation for the raising CFBB, saves the operating maintenance expense, and proposes a kind of material circulation device of non-mechanical means control.
For reaching above-mentioned purpose, the utility model is taked to regulate the high-temperature material amount that enters returning charge mechanism and external heat exchanger and ratio thereof with air quantity, and concrete technical solution has two kinds.
Scheme 1:
The material circulation device of CFBB, comprise the combustion chamber, cyclone separator, returning charge mechanism and external heat exchanger, it is characterized in that on returning charge mechanism and the external heat exchanger, repeatedly put down, be communicated with material channel, wherein repeatedly put a superincumbent side and be provided with the crosswind wind-distributing pipe, feed pipe, and material channel within it has opening to communicate with feed space, said returning charge mechanism is separated out feed space and the returning charge chamber that the below communicates with each other with dividing plate, below feed space and returning charge chamber, air distribution plate is arranged, arrange blast cap on the air distribution plate, there are charging air compartment that communicates with feed space and the returning charge air compartment that communicates with the returning charge chamber in the air distribution plate below, the charging air compartment is communicated with loosening wind Q2 airduct, the returning charge air compartment is communicated with fluidized wind Q1 airduct, the external heat exchanger inner-use clapboard is separated out feed space and the fluidized bed heat exchanger bed that the below communicates with each other, below feed space and fluidized bed heat exchanger bed, air distribution plate is arranged, blast cap distributes on the air distribution plate, there are charging air compartment that communicates with feed space and the heat exchange bed air compartment that communicates with the fluidized bed heat exchanger bed in the air distribution plate below, the charging air compartment is communicated with loosening wind Q4 airduct, the heat exchange bed air compartment is communicated with fluidized wind Q3 airduct, on the fluidized bed heat exchanger bed, be provided with air outlet, be furnished with heated surface bundle in it, the returning charge chamber of returning charge mechanism and the fluidized bed heat exchanger bed of external heat exchanger have the returning charge ash pipe to communicate with combustion chamber respectively.
Scheme 2:
The material circulation device of CFBB, comprise the combustion chamber, cyclone separator, returning charge mechanism and external heat exchanger, it is characterized in that returning charge mechanism and external heat exchanger and put, lay respectively at the both sides of shared material feed space, on feed space, be provided with feed pipe, there is air distribution plate the below of feed space, be furnished with blast cap on the air distribution plate, there is the air compartment that communicates with feed space the air distribution plate below, this air compartment is communicated with loosening wind Q2 airduct, the returning charge chamber of returning charge mechanism is communicated with feed space, below the returning charge chamber, air distribution plate is arranged, arrange blast cap on the air distribution plate, there is the returning charge air compartment that communicates with the returning charge chamber below of air distribution plate, the returning charge air compartment is communicated with fluidized wind Q1 airduct, the fluidized bed heat exchanger bed of external heat exchanger is communicated with feed space, below the fluidized bed heat exchanger bed, air distribution plate is arranged, arrange blast cap on the air distribution plate, there is the heat exchange bed air compartment that communicates with the fluidized bed heat exchanger bed air distribution plate below, the heat exchange bed air compartment is communicated with fluidized wind Q3 airduct, be provided with air outlet on the fluidized bed heat exchanger bed, be furnished with heated surface bundle in it, the returning charge chamber of returning charge mechanism and the fluidized bed heat exchanger bed of external heat exchanger have the returning charge ash pipe to communicate with combustion chamber respectively.
The said heated surface bundle that is arranged in the fluidized bed heat exchanger bed is boiler economizer or evaporating heating surface or superheater or reheater in above-mentioned two kinds of schemes.
The material circulation device of CFBB of the present utility model, each air quantity of sending into during by control returning charge mechanism and external heat exchanger operation, regulate the high-temperature material amount that enters returning charge mechanism and external heat exchanger, regulating the traditional mechanical valve of replacement with air quantity regulates, overcome the serious wear that mechanical valve control exists, problems such as maintenance cost height have improved the safety in operation of CFBB.
Description of drawings
Fig. 1 is that the schematic diagram above external heat exchanger is repeatedly put by returning charge mechanism;
Fig. 2 is that external heat exchanger is repeatedly put the schematic diagram above returning charge mechanism;
Fig. 3 is returning charge mechanism and external heat exchanger and puts schematic diagram that wherein scheming a) is vertical view, figure b) be figure A-A view a), figure c) be figure B-B view a).
The specific embodiment
Shown in Figure 1, the A of returning charge mechanism repeatedly puts above external heat exchanger B, both are communicated with material channel 4, wherein there is crosswind Q5 wind-distributing pipe 21 in the returning charge mechanism that changes up, feed pipe 1, being positioned at the in-house material channel 4 of returning charge has opening 3 to communicate with its feed space, said returning charge mechanism is with dividing plate 5 ' be separated out feed space 5 and returning charge chamber 6 that the below communicates with each other, below feed space 5 and returning charge chamber 6, air distribution plate 10 is arranged, arrange blast cap 11 on the air distribution plate 10, there are charging air compartment 9 that communicates with feed space 5 and the returning charge air compartment 12 that communicates with returning charge chamber 6 in air distribution plate 10 belows, charging air compartment 9 is communicated with loosening wind Q2 airduct, and returning charge air compartment 12 is communicated with fluidized wind Q1 airduct; Feed space 7 and fluidized bed heat exchanger bed 8 that external heat exchanger inner-use clapboard 7 ' be separated out below communicates with each other, below feed space 7 and fluidized bed heat exchanger bed 8, air distribution plate 15 is arranged, distribution blast cap 16 on the air distribution plate 15, there are charging air compartment 14 that communicates with feed space 7 and the heat exchange bed air compartment 17 that communicates with fluidized bed heat exchanger bed 8 in air distribution plate 15 belows, charging air compartment 14 is communicated with loosening wind Q4 airduct, heat exchange bed air compartment 17 is communicated with fluidized wind Q3 airduct, on fluidized bed heat exchanger bed 8, be provided with air outlet 22, be furnished with heated surface bundle 19 in the fluidized bed heat exchanger bed, the returning charge chamber 6 of returning charge mechanism and the fluidized bed heat exchanger bed 8 of external heat exchanger have returning charge ash pipe 20 to communicate with combustion chamber respectively.
During operation, flowing downward through the charging standpipe from the high temperature ash of boiler cyclone separator is divided into two strands, and one enters returning charge mechanism, and another stock-traders' know-how material channel continues to flow downward and enters external heat exchanger.The loosening air quantity Q2 that enters feed space in the returning charge mechanism should be less than critical flow wind transmission amount, and it is bigger to enter the intake Q1 of returning charge chamber, keeps good fluidized state.Similarly, the loosening air quantity Q4 that enters feed space in the external heat exchanger should be less than critical flow wind transmission amount, and it is bigger to enter the intake Q3 of fluidized bed heat exchanger bed, keeps good fluidized state.Arrange that in the fluidized bed heat exchanger bed heated surface bundle absorbs the heat of high-temperature material.The material that is come out by returning charge mechanism and fluidized bed heat exchanger bed directly sends back to boiler furnace by the returning charge ash pipe.By regulating following cloth wind air quantity: the fluidized wind Q1 of (1) returning charge mechanism returning charge chamber; (2) the fluidized wind Q3 of the loosening wind Q2 of returning charge mechanism feed space (in critical flow wind transmission weight range) (3) fluidized bed heat exchanger bed; (4) the loosening wind Q4 (in critical flow wind transmission weight range) of heat exchanger feed space; (5) the cross air blasting Q5 that enters by the cross air blasting wind-distributing pipe.Can realize controlling the high-temperature material amount that enters external heat exchanger.Increase the loosening wind Q4 of fluidized wind Q3, heat exchanger feed space of fluidized bed heat exchanger bed, reduce fluidized wind Q1, the loosening wind Q2 and the cross air blasting Q5 of returning charge mechanism feed space of returning charge mechanism returning charge chamber, can increase the recycle stock amount that enters external heat exchanger.
Shown in Figure 2, external heat exchanger B repeatedly puts above the A of returning charge mechanism, the change difference of interposed structure of it and Fig. 1 only is that crosswind Q5 wind-distributing pipe 21, feed pipe 1 are set on external heat exchanger, and the material channel 4 that is positioned at external heat exchanger has opening 3 to communicate with its feed space 7.
Shown in Figure 3, juxtaposed returning charge mechanism and external heat exchanger lay respectively at the both sides of shared material feed space 2, on feed space 2, be provided with feed pipe 1, there is air distribution plate 13 below of feed space 2, be furnished with blast cap 18 on the air distribution plate 13, there is the air compartment 23 that communicates with feed space 2 air distribution plate 13 belows, and air compartment 23 is communicated with loosening wind Q2 airduct; The returning charge chamber 6 of the A of returning charge mechanism is communicated with feed space 2, air distribution plate 10 is arranged below returning charge chamber 6, arrange blast cap 11 on the air distribution plate 10, there is the returning charge air compartment 12 that communicates with returning charge chamber 6 below of air distribution plate 10, returning charge air compartment 12 is communicated with fluidized wind Q1 airduct, the fluidized bed heat exchanger bed 8 of external heat exchanger B is communicated with feed space 2, air distribution plate 15 is arranged below fluidized bed heat exchanger bed 8, arrange blast cap 16 on the air distribution plate 15, there is the heat exchange bed air compartment 17 that communicates with fluidized bed heat exchanger bed 8 air distribution plate 15 belows, heat exchange bed air compartment 17 is communicated with fluidized wind Q3 airduct, on fluidized bed heat exchanger bed 8, be provided with air outlet 22, be furnished with heated surface bundle 19 in the fluidized bed heat exchanger bed, the returning charge chamber 6 of returning charge mechanism and the fluidized bed heat exchanger bed 8 of external heat exchanger have returning charge ash pipe 20 to communicate with combustion chamber respectively.
During operation, the air quantity that enters shared feed space should be less than critical flow wind transmission amount, and enters returning charge mechanism returning charge chamber and enter the air quantity of fluidized bed heat exchanger bed all bigger, keeps good fluidized state.The heating surface of arranging in the fluidized bed heat exchanger bed absorbs the heat of high-temperature material.The material that is come out by the returning charge chamber and the fluidized bed heat exchanger bed of returning charge mechanism directly sends back to boiler furnace by the returning charge ash pipe.By regulating following cloth wind air quantity: the fluidized wind Q1 of (1) returning charge mechanism returning charge chamber; (2) the loosening air quantity Q2 of shared material feed space; (3) the fluidized wind Q3 of fluidized bed heat exchanger bed can realize controlling the high-temperature material amount that enters external heat exchanger.Increase the fluidized wind Q3 of fluidized bed heat exchanger bed, reduce the fluidized wind Q1 of returning charge mechanism returning charge chamber, can increase the recycle stock amount that enters external heat exchanger.
Claims (5)
1. the material circulation device of CFBB, comprise the combustion chamber, cyclone separator, returning charge mechanism [A] and external heat exchanger [B], it is characterized in that on returning charge mechanism [A] and the external heat exchanger [B], repeatedly put down, be communicated with material channel [4], wherein repeatedly put a superincumbent side and be provided with crosswind [Q5] wind-distributing pipe [21], feed pipe [1], and material channel within it [4] has opening [3] to communicate with feed space, said returning charge mechanism is separated out feed space [5] and returning charge chamber [6] that the below communicates with each other with dividing plate [5 '], there is air distribution plate [10] below in feed space [5] and returning charge chamber [6], air distribution plate [10] is gone up and is arranged blast cap [11], there are charging air compartment [9] that communicates with feed space [5] and the returning charge air compartment [12] that communicates with returning charge chamber [6] in air distribution plate [10] below, charging air compartment [9] is communicated with loosening wind [Q2] airduct, returning charge air compartment [12] is communicated with fluidized wind [Q1] airduct, external heat exchanger inner-use clapboard [7 '] is separated out feed space [7] and the fluidized bed heat exchanger bed [8] that the below communicates with each other, there is air distribution plate [15] below at feed space [7] and fluidized bed heat exchanger bed [8], air distribution plate [15] is gone up and is arranged blast cap [16], there are charging air compartment [14] that communicates with feed space [7] and the heat exchange bed air compartment [17] that communicates with fluidized bed heat exchanger bed [8] in air distribution plate [15] below, charging air compartment [14] is communicated with loosening wind [Q4] airduct, heat exchange bed air compartment [17] is communicated with fluidized wind [Q3] airduct, on fluidized bed heat exchanger bed [8], be provided with air outlet [22], be furnished with heated surface bundle [19] in it, the returning charge chamber [6] of returning charge mechanism and the fluidized bed heat exchanger bed [8] of external heat exchanger have returning charge ash pipe [20] to communicate with combustion chamber respectively.
2. by the material circulation device of the described CFBB of claim 1, it is characterized in that said returning charge mechanism [A] repeatedly puts in the top of external heat exchanger [B] or external heat exchanger [B] is repeatedly put top at returning charge mechanism [A].
3. by the material circulation device of the described CFBB of claim 1, it is characterized in that said heated surface bundle [19] is boiler economizer or evaporating heating surface or superheater or reheater.
4. the material circulation device of CFBB, comprise the combustion chamber, cyclone separator, returning charge mechanism [A] and external heat exchanger [B], it is characterized in that returning charge mechanism [A] and external heat exchanger [B] and put, lay respectively at the both sides of shared material feed space [2], on feed space [2], be provided with feed pipe [1], there is air distribution plate [13] below of feed space [2], be furnished with blast cap [18] on the air distribution plate [13], there is the air compartment [23] that communicates with feed space [2] air distribution plate [13] below, this air compartment [23] is communicated with loosening wind [Q2] airduct, the returning charge chamber [6] of returning charge mechanism [A] is communicated with feed space [2], in the below of returning charge chamber [6] air distribution plate [10] is arranged, air distribution plate [10] is gone up and is arranged blast cap [11], there is the returning charge air compartment [12] that communicates with returning charge chamber [6] below of air distribution plate [10], returning charge air compartment [12] is communicated with fluidized wind [Q1] airduct, the fluidized bed heat exchanger bed [8] of external heat exchanger [B] is communicated with feed space [2], in the below of fluidized bed heat exchanger bed [8] air distribution plate [15] is arranged, air distribution plate [15] is gone up and is arranged blast cap [16], there is the heat exchange bed air compartment [17] that communicates with fluidized bed heat exchanger bed [8] air distribution plate [15] below, heat exchange bed air compartment [17] is communicated with fluidized wind [Q3] airduct, on fluidized bed heat exchanger bed [8], be provided with air outlet [22], be furnished with heated surface bundle [19] in it, the returning charge chamber [6] of returning charge mechanism and the fluidized bed heat exchanger bed [8] of external heat exchanger have returning charge ash pipe [20] to communicate with combustion chamber respectively.
5. by the material circulation device of the described CFBB of claim 4, it is characterized in that said heated surface bundle [19] is boiler economizer or evaporating heating surface or superheater or reheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01274407 CN2515543Y (en) | 2001-12-22 | 2001-12-22 | Material circulating device of cyclic fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01274407 CN2515543Y (en) | 2001-12-22 | 2001-12-22 | Material circulating device of cyclic fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2515543Y true CN2515543Y (en) | 2002-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01274407 Expired - Fee Related CN2515543Y (en) | 2001-12-22 | 2001-12-22 | Material circulating device of cyclic fluidized bed boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN2515543Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304783C (en) * | 2001-12-22 | 2007-03-14 | 浙江大学 | Wind control type material outside circulating device of circulating fluid bed boiler |
| CN100353116C (en) * | 2002-12-06 | 2007-12-05 | 中国科学院工程热物理研究所 | Cinder cooler for regulating hearth temperature of circulating fluidized bed boiler and its regulation method |
| CN106838889A (en) * | 2017-02-09 | 2017-06-13 | 重庆大学 | A kind of CFBB with interior circulation ash heat exchanger |
| CN110064342A (en) * | 2018-04-10 | 2019-07-30 | 新能能源有限公司 | Right angle butterfly valve |
| CN111492176A (en) * | 2017-12-19 | 2020-08-04 | 维美德技术有限公司 | Circulating fluidized bed boiler with material returning heat exchanger |
| CN112377895A (en) * | 2020-11-10 | 2021-02-19 | 浙江大学 | Adjustable double-bed anti-corrosion external high-temperature superheater ash return device and method |
| CN114278926A (en) * | 2021-11-25 | 2022-04-05 | 国家能源集团国源电力有限公司 | Boiler power-off protection system |
-
2001
- 2001-12-22 CN CN 01274407 patent/CN2515543Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304783C (en) * | 2001-12-22 | 2007-03-14 | 浙江大学 | Wind control type material outside circulating device of circulating fluid bed boiler |
| CN100353116C (en) * | 2002-12-06 | 2007-12-05 | 中国科学院工程热物理研究所 | Cinder cooler for regulating hearth temperature of circulating fluidized bed boiler and its regulation method |
| CN106838889A (en) * | 2017-02-09 | 2017-06-13 | 重庆大学 | A kind of CFBB with interior circulation ash heat exchanger |
| CN111492176A (en) * | 2017-12-19 | 2020-08-04 | 维美德技术有限公司 | Circulating fluidized bed boiler with material returning heat exchanger |
| CN111492176B (en) * | 2017-12-19 | 2022-04-08 | 维美德技术有限公司 | Circulating fluidized bed boiler with material returning heat exchanger |
| CN110064342A (en) * | 2018-04-10 | 2019-07-30 | 新能能源有限公司 | Right angle butterfly valve |
| CN110064342B (en) * | 2018-04-10 | 2024-02-09 | 新能能源有限公司 | Right-angle butterfly valve |
| CN112377895A (en) * | 2020-11-10 | 2021-02-19 | 浙江大学 | Adjustable double-bed anti-corrosion external high-temperature superheater ash return device and method |
| CN114278926A (en) * | 2021-11-25 | 2022-04-05 | 国家能源集团国源电力有限公司 | Boiler power-off protection system |
| CN114278926B (en) * | 2021-11-25 | 2024-01-19 | 国家能源集团国源电力有限公司 | Boiler power-off protection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |