CN202253613U - Fluidized bed boiler air cap and fluidized bed boiler air distribution device - Google Patents
Fluidized bed boiler air cap and fluidized bed boiler air distribution device Download PDFInfo
- Publication number
- CN202253613U CN202253613U CN 201120379031 CN201120379031U CN202253613U CN 202253613 U CN202253613 U CN 202253613U CN 201120379031 CN201120379031 CN 201120379031 CN 201120379031 U CN201120379031 U CN 201120379031U CN 202253613 U CN202253613 U CN 202253613U
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- blast cap
- air
- fluidized
- bed combustion
- combustion boiler
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Abstract
The utility model relates to a fluidized bed boiler air cap and a fluidized bed boiler air distribution device. The utility model relates to the fluidized bed boiler air cap (100), comprising an air cap cover (110) and an air inlet duct (120), wherein the air cap cover (110) is provided with an inner cavity, the air inlet duct (120) stretches into the inner cavity of the air cap cover (110) and forms an air duct (160) with the inner wall of the air cap cover (110), the lower part of the air cap cover (110) is provided with a plurality of air outlets (140) which are in fluid communication with the air duct (160), the air outlets (140) are uniformly distributed along the circumference of the air cap cover (110), and the longitudinal axis of each air outlet (140) extends outwards along the radial direction of the air cap cover (110) and inclines downwards to form an included angle alpha with the horizontal plane. The utility model further relates to the fluidized bed boiler air distribution device, comprising the fluidized bed boiler air cap (100) provided by the utility model and an air distribution plate (200) arranged below the fluidized bed boiler air cap (100). By the adoption of the fluidized bed boiler air cap, the resistance of the air distribution plate is increased, the air chamber temperature is stable, and no slag leakage and no coking occur.
Description
Technical field
The utility model provides a kind of fluidized-bed combustion boiler blast cap and fluidized-bed combustion boiler air-distribution device, especially blast cap of circulating fluidized bed boiler.
Background technology
Be utilize resources synthetically, the protection environment is increased economic efficiency, DCL/Direct coal liquefaction is project assorted built with coal directly-liquefied residue (being the putty slag) and in washing coal be the CFBB of fuel.Because the DCL/Direct coal liquefaction project is the world's first cover engineering, the putty slag also is on CFBB, to use first.Boiler grid plate hood for circulating fluid bed adopts the universal type (see figure 1).As shown in Figure 1, the blast cap before the repacking comprises blast cap cover 1 and blast pipe 2.Air outlet on blast cap cover 1 sidewall is a horizontal direction.After the operation, this blast cap leaks slag serious (lime-ash bleed from bed to water cooled wind chamber), and the empty bed of air distribution plate resistance is less than 3500Pa; A large amount of lime-ash water cooled wind chamber that bleeds causes the water cooled wind chamber space to be reduced, and air distribution plate cloth wind is uneven; The bed materials flowization is uneven; The coking of bed material causes the generation of blowing out accident, in order to guarantee the reliability service of boiler, must be in operation and regularly water cooled wind chamber carried out artificial accident deslagging.
The coal direct liquefaction oil lime-ash as the fuel first Application in CFBB, because putty slag and CFBB traditional fuel have many different qualities, after CFBB puts into operation; A large amount of lime-ash water cooled wind chamber that bleeds will cause the water cooled wind chamber space to be reduced, and one time wind mixes uneven; One time wind resistance increases, and air distribution plate cloth wind is uneven, and the bed materials flowization is uneven; Exist the coking of bed material to cause the generation of blowing out accident, boiler can not get guaranteeing to the steam supply reliability of chemical production device.For the continuous operation that guarantees boiler guarantees the steam supply to chemical plant installations, must be in operation and regularly water cooled wind chamber carried out artificial accident deslagging.The temperature higher (230-450 ℃) of slag has not only caused pollution to environment when artificial slagging owing to bleed in the water cooled wind chamber, has potential safety hazard simultaneously.It is particularly serious that the #2 boiler leaks slag, and water cooled wind chamber almost is to carry out artificial deslagging continuously.
Therefore solve blast cap and leak the necessary condition that slag is solution stable operation of the boiler, cleaning operation, safe operation.
Blast cap lateral vertical air intake, blast cap body diameter is big, causes the air distribution plate resistance little, is difficult to sealing, thereby causes blast cap to leak slag.
The utility model content
The utility model relates to a kind of fluidized-bed combustion boiler blast cap, comprising:
The blast cap cover has inner chamber;
Blast pipe extend in the inner chamber of blast cap cover, and and the inwall of blast cap cover between form the air channel;
Wherein, the bottom of blast cap cover is provided with a plurality of and the air outlet air channel fluid communication, and air outlet evenly distributes along the circumference of blast cap cover, the longitudinal axis of each air outlet along the blast cap cover extend radially outwardly and downward-sloping, form angle with horizontal plane.
Preferably, the fluidized-bed combustion boiler blast cap of the utility model further comprises: increase the resistance sleeve pipe, at least a portion liner is in blast pipe.
Preferably, increasing length that the resistance sleeve pipe extend into blast pipe accounts for and increases more than 1/2 of the whole length of resistance sleeve pipe.
Preferably, increasing the internal diameter that hinders sleeve pipe is 32mm.
Preferably, increase the top of a part of liner of resistance sleeve pipe at blast pipe.
Preferably, angle is 5～25 °.
Preferably, angle is 15 °.
Preferably, the number of air outlet is 4～12.
Preferably, the number of air outlet is 8.
Preferably; Blast cap cover internal diameter is
preferably, and blast cap cover internal diameter is
The utility model also relates to a kind of fluidized-bed combustion boiler air-distribution device, comprising:
The fluidized-bed combustion boiler blast cap of the utility model; And
Air distribution plate is arranged on the below of fluidized-bed combustion boiler blast cap.
Adopt the fluidized-bed combustion boiler blast cap of the utility model, increased the air distribution plate resistance, the air compartment temperature stabilization, do not leak slag, noncoking.
Description of drawings
Fig. 1 is the preceding blast cap sketch map of repacking.
Fig. 2 is a kind of sketch map of preferred implementation of the blast cap of the utility model.
Fig. 3 is the cross sectional representation of the blast cap shown in Figure 2 of the utility model.
The specific embodiment
In the utility model, under the situation of not contradiction or conflict, all embodiment, embodiment and the characteristic of the utility model can make up each other.
In the utility model, for the emphasis of outstanding the utility model, the omission that some conventional operations and unit, parts are carried out, or only do simple description.
The utility model relates in one aspect to a kind of fluidized-bed combustion boiler blast cap, comprising:
Wherein, The bottom of blast cap cover 110 is provided with a plurality of and air outlets 140 air channel 160 fluid communication; Air outlet 140 evenly distributes along the circumference of blast cap cover 110, the longitudinal axis of each air outlet 140 along blast cap cover 110 extend radially outwardly and downward-sloping, form angle with horizontal plane.
Preferably, the fluidized-bed combustion boiler blast cap of the utility model further comprises: increase resistance sleeve pipe 130, at least a portion liner is in blast pipe 120.
Following embodiment will further specify the instance that uses the utility model, but therefore the utility model does not receive any restriction.
As shown in Figure 2, fluidized-bed combustion boiler blast cap 100 comprises: blast cap cover 110, blast pipe 120, increase resistance sleeve pipe 130, air outlet 140.
The lower case of blast cap cover 110 is provided with a plurality of and air outlets 140 air channel 160 fluid communication.It is as shown in Figure 3 that (cross section of Fig. 3 apoplexy calotte 110 is the cross sections along air outlet 140; Mid portion is blast pipe 120 and the cross section that increases resistance sleeve pipe 130; For succinctly; With it shown in the same figure), each air outlet 140 evenly distributes along the circumference of blast cap cover 110, and along the radially extension of blast cap cover 110.The longitudinal axis of each air outlet 140 is downward-sloping, forms angle with horizontal plane.That is, the longitudinal axis of each air outlet 140 is low inside and high outside.The longitudinal axis of each air outlet 140 and the angle of horizontal plane are 5～25 °, preferred 10～20 °, and for example 15 °.The number of air outlet 140 can be 4～12, preferred 6～10, and more preferably 6～8, for example, 8.Preferably, the number of air outlet 140 is an even number.For example, blast cap cover 110 internal diameters are
preferred
Be lined with in the blast pipe 120 and increase resistance sleeve pipe 130.Increase resistance sleeve pipe 130 and be arranged in the blast pipe 120, combine ordinatedly with blast pipe 120.As shown in Figure 2, increasing resistance sleeve pipe 130 can a part be arranged in the blast pipe 120, and another part stretches out outside the blast pipe 120.Preferably, increasing the major part that hinders sleeve pipe 130 is arranged in the blast pipe 120.Preferably, increase the length that resistance sleeve pipe 130 extend into blast pipe 120 and account for more than 1/2 of its whole length, preferred more than 2/3, more preferably more than 3/4, most preferably more than 4/5, for example more than 90%, preferred more than 95%.For example, increasing resistance sleeve pipe 130 length is 85mm, and the length that extend into blast pipe 120 is 80mm.Increasing resistance sleeve pipe 130 also can all be arranged in the blast pipe 120.Increase resistance sleeve pipe 130 and can be stainless steel tube.Increase resistance sleeve pipe 130 specifications and for example can be
As shown in Figure 2, the fluidized-bed combustion boiler air-distribution device of the utility model comprises: blast cap 100 and the air distribution plate 200 that is arranged on blast cap 100 belows.Preferably, the resistance of the air distribution plate 200 that is used with blast cap 100 is more than 5600Pa, more than the preferred 5800Pa, more preferably more than the 6000Pa.
We are through big quantitative analysis, test, research, and pure pulverized-coal fired boiler air distribution plate resistance promptly can realize not leaking slag less than 3500Pa, need reach 5600Pa and just can reach the effect of not leaking slag and mix behind the oil firing lime-ash air distribution plate resistance.
A kind of preferred embodiment in; The utility model is for increasing the air distribution plate resistance, downward-sloping 15 ° of blast cap cover internal diameter employing
blast cap air outlet and blast cap cover; The stainless steel tube of blast cap core pipe (adapter) liner
; Length is 85mm; Stretching into core pipe (blast pipe) length is 80mm, and bushing pipe and core pipe adopt welding connecting mode.
The utility model key for design point is sleeve design, reduces blast cap internal diameter, angle air intake, has increased the air distribution plate resistance, the air compartment temperature stabilization, does not leak slag, noncoking, for the safe and stable operation of CFBB provides abundant assurance.
Telescopic low slag cap structure critical piece comprises: blast pipe, increase resistance sleeve pipe and blast cap cover.Increase the resistance sleeve pipe and adopt 120 ° of spot welding to be connected with blast pipe, the blast cap cover directly is sleeved on the blast pipe, and maintenance is changed very convenient.Assembling after wind shape for hat formula is seen Fig. 2, and the boiler slag removal operational effect that is installed in behind the air distribution plate sees below.
Before repacking, it is serious that the boiler water-cooling air compartment leaks slag, moves a month water cooled wind chamber a large amount of slag that just bleeds, and can reach 2/3 of water cooled wind chamber volume at most.For guaranteeing boiler safety stable operation, all will carry out artificial deslagging the every day of having to during regular job, the about 1m of bed drain purge
3/ day.After repacking, leak slag and be under control, move one month and do not find have slag to bleed in the water cooled wind chamber, do not need workman's deslagging yet, reached Expected Results.
Embodiment
As shown in Figures 2 and 3, blast cap cover 110 internal diameters adopt
blast cap air outlet 140 downward-sloping 15 °; Blast cap core pipe 120 (adapter) liner one
stainless steel tube; Length is 85mm; Stretching into the core length of tube is 80mm, and bushing pipe and core pipe adopt welding connecting mode.The aerofoil resistance reaches more than the 5600Pa.
The operational effect experiment
Adopt preceding blast cap of transformation shown in Figure 1 and the blast cap of the utility model shown in Figure 2 respectively, move one month identical time, the leakage slag situation in the observation water cold air chamber.Experimental result is as shown in table 1.
Table 1
As implied above, adopt the blast cap before transforming, it is serious that the leakage slag in the water cooled wind chamber leaks slag, only leaked the quantity of slag in one month and can be stacked into 2/3 of air compartment space.And the blast cap of employing the utility model moves one month equally and almost finds to leak slag, leaks the quantity of slag also only less than 2% and move three months.
Certainly, the utility model also can have other specific embodiment, and the preferred implementation that the above is merely the utility model is not the protection domain that is used for limiting the utility model; Under the situation that does not deviate from the utility model spirit, those of ordinary skills are every to make various corresponding variations and modification according to the utility model content, all belongs to the protection domain of the claim of the utility model.
Claims (12)
1. a fluidized-bed combustion boiler blast cap (100) is characterized in that, comprising:
Blast cap cover (110) has inner chamber;
Blast pipe (120) extend in the inner chamber of said blast cap cover (110), and and the inwall of blast cap cover (110) between form air channel (160);
Wherein, The bottom of said blast cap cover (110) is provided with the air outlet (140) of a plurality of and said air channel (160) fluid communication; Said air outlet (140) evenly distributes along the circumference of said blast cap cover (110); The longitudinal axis of each said air outlet (140) along said blast cap cover (110) extend radially outwardly and downward-sloping, form angle with horizontal plane.
2. fluidized-bed combustion boiler blast cap according to claim 1 (100) is characterized in that, further comprises: increase resistance sleeve pipe (130), the said at least a portion liner that increases resistance sleeve pipe (130) is in said blast pipe (120).
3. fluidized-bed combustion boiler blast cap according to claim 2 (100) is characterized in that, saidly increases the length that resistance sleeve pipe (130) extend into said blast pipe (120) and accounts for said more than 1/2 of the whole length of resistance sleeve pipe (130) that increases.
4. fluidized-bed combustion boiler blast cap according to claim 2 (100) is characterized in that, the said internal diameter that increases resistance sleeve pipe (130) is 32mm.
5. fluidized-bed combustion boiler blast cap according to claim 2 (100) is characterized in that, the said top that increases a part of liner of resistance sleeve pipe (130) in said blast pipe (120).
6. fluidized-bed combustion boiler blast cap according to claim 1 (100) is characterized in that, said angle is 5～25 °.
7. fluidized-bed combustion boiler blast cap according to claim 1 (100) is characterized in that, said angle is 15 °.
8. fluidized-bed combustion boiler blast cap according to claim 1 (100) is characterized in that, the number of said air outlet (140) is 4～12.
9. fluidized-bed combustion boiler blast cap according to claim 1 (100) is characterized in that, the number of said air outlet (140) is 8.
10. fluidized-bed combustion boiler blast cap according to claim 1 (100); It is characterized in that said blast cap cover (110) internal diameter is
11. fluidized-bed combustion boiler blast cap according to claim 1 (100); It is characterized in that said blast cap cover (110) internal diameter is
12. a fluidized-bed combustion boiler air-distribution device is characterized in that, comprising:
According to each described fluidized-bed combustion boiler blast cap (100) of claim 1 to 11; And
Air distribution plate (200) is arranged on the below of said fluidized-bed combustion boiler blast cap (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120379031 CN202253613U (en) | 2011-09-28 | 2011-09-28 | Fluidized bed boiler air cap and fluidized bed boiler air distribution device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120379031 CN202253613U (en) | 2011-09-28 | 2011-09-28 | Fluidized bed boiler air cap and fluidized bed boiler air distribution device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202253613U true CN202253613U (en) | 2012-05-30 |
Family
ID=46114849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120379031 Expired - Lifetime CN202253613U (en) | 2011-09-28 | 2011-09-28 | Fluidized bed boiler air cap and fluidized bed boiler air distribution device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132335A (en) * | 2013-05-03 | 2014-11-05 | 国家电网公司 | Circulating fluidized bed boiler furnace having bottom-inserted secondary air pipe |
| CN105757652A (en) * | 2016-04-12 | 2016-07-13 | 无锡华光锅炉股份有限公司 | Material returning blast cap structure |
| CN107013904A (en) * | 2017-04-14 | 2017-08-04 | 中国石油化工股份有限公司 | A kind of CFBB A types blast cap and its manufacture method |
| WO2017206430A1 (en) * | 2016-05-30 | 2017-12-07 | 广东工业大学 | Circulating fluidized bed combustion system with uniform air distribution device |
| CN107883775A (en) * | 2017-12-22 | 2018-04-06 | 中国恩菲工程技术有限公司 | Air supply plant and magnetic iron ore metallurgical slag treatment furnace for magnetic iron ore metallurgical slag treatment furnace |
| CN108800115A (en) * | 2018-07-09 | 2018-11-13 | 杭州启澄科技有限公司 | A kind of Wind cap for boiler that power plant field uses |
| CN108826282A (en) * | 2018-07-17 | 2018-11-16 | 丁杨洋 | A kind of block-proof type blast cap used on boiler in power industry |
-
2011
- 2011-09-28 CN CN 201120379031 patent/CN202253613U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132335A (en) * | 2013-05-03 | 2014-11-05 | 国家电网公司 | Circulating fluidized bed boiler furnace having bottom-inserted secondary air pipe |
| CN104132335B (en) * | 2013-05-03 | 2016-04-20 | 国家电网公司 | The boiler hearth of circulating fluidized bed of secondary air channel is inserted with bottom |
| CN105757652A (en) * | 2016-04-12 | 2016-07-13 | 无锡华光锅炉股份有限公司 | Material returning blast cap structure |
| WO2017206430A1 (en) * | 2016-05-30 | 2017-12-07 | 广东工业大学 | Circulating fluidized bed combustion system with uniform air distribution device |
| US10174936B2 (en) | 2016-05-30 | 2019-01-08 | Guangdong University Of Technology | Circular fluidizing bed combustion system with uniform airflow distributing device |
| CN107013904A (en) * | 2017-04-14 | 2017-08-04 | 中国石油化工股份有限公司 | A kind of CFBB A types blast cap and its manufacture method |
| CN107883775A (en) * | 2017-12-22 | 2018-04-06 | 中国恩菲工程技术有限公司 | Air supply plant and magnetic iron ore metallurgical slag treatment furnace for magnetic iron ore metallurgical slag treatment furnace |
| CN107883775B (en) * | 2017-12-22 | 2024-03-19 | 中国恩菲工程技术有限公司 | Air supply device for pyrrhotite smelting slag treatment furnace and pyrrhotite smelting slag treatment furnace |
| CN108800115A (en) * | 2018-07-09 | 2018-11-13 | 杭州启澄科技有限公司 | A kind of Wind cap for boiler that power plant field uses |
| CN108826282A (en) * | 2018-07-17 | 2018-11-16 | 丁杨洋 | A kind of block-proof type blast cap used on boiler in power industry |
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Granted publication date: 20120530 |
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| CX01 | Expiry of patent term |