CN101566341A - Exponential flow-resisting frame used for reducing abrasion of circulating fluidized bed boiler water-cooling wall - Google Patents
Exponential flow-resisting frame used for reducing abrasion of circulating fluidized bed boiler water-cooling wall Download PDFInfo
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- CN101566341A CN101566341A CNA2009100519455A CN200910051945A CN101566341A CN 101566341 A CN101566341 A CN 101566341A CN A2009100519455 A CNA2009100519455 A CN A2009100519455A CN 200910051945 A CN200910051945 A CN 200910051945A CN 101566341 A CN101566341 A CN 101566341A
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- choked flow
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- cooling wall
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- fluidized bed
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Abstract
The invention relates to a flow-resisting frame, in particular to an exponential flow-resisting frame used for reducing abrasion of a circulating fluidized bed boiler water-cooling wall. The flow-resisting frame comprises a plurality of water-cooling wall pipes and fins; all adjacent water-cooling wall pipes are connected with each other by fins; the flow-resisting frame is characterized in that the walls of the water-cooling wall pipes and the fins are provided with a plurality of groups of flow-resisting beams that are arranged horizontally or vertically; the beam body of each flow-resisting beam is internally provided with a plurality of grabbing nails; and the internal ends of the grabbing nails are welded on the fin along the arrangement direction of the flow-resisting beams. The invention aims at designing the exponential flow-resisting frame which can obviously reduce the wall pressing weir flow and effectively resist and lighten the abrasion of the bed material and the flying ash on the water-cooling wall pipes. Compared with the prior art, the flow-resisting frame reduces the abrasion rate by 50-80%, has firmly supported flow-resisting beams, does not obviously affect the bed temperature or affect the steam temperature and exhaust smoke temperature, can be matched with the spraying coating, thus forming a non-wearable effect on a furnace body.
Description
Technical field
The present invention relates to a kind of choked flow frame, particularly a kind of index choked flow frame that is used for the circulating fluidized bed boiler water-cooling wall anti-attrition.
Background technology
In order to reduce SO
2, NO
XDischarge capacity, improve energy utilization rate, improve the combustion technology of boiler, novel CFBB has become a kind of efficient, oligosaprobic generating and the heating boiler of wideling popularize application in the world wide in recent years.But from the Circulating Fluidized Bed Boilers ruuning situation of having gone into operation, ubiquity stove hall water-cooling wall sharp wear problem, security and stability is poor, and continuous operating time is short, and pipe explosion accident is frequent, often is called as " week stove ", " season stove ".
Cause the main cause of water screen tube wearing and tearing to be: bed material and flying dust constantly rise in the middle of the stove hall because of fluidisation, the formation " sticking wall flow " that descends fast of the water screen tube around the stove hall again simultaneously, bed material and flying dust are along with " sticking wall flow " causes heavy wear to water screen tube, particularly in the Lu Tang bottom, sticking wall flow and bed material are higher with flying dust speed, a mill diameter is bigger, so wearing and tearing are more violent.Because the intrinsic burning form of CFBB adopts methods such as changing tubing, built-up welding protection, spraying protection to be difficult to obtain desirable effect.Have only under the prerequisite that does not influence the burning form, by special construction reduce " sticking wall flow " thus speed reduce the flow velocity of bed material and flying dust, be only the effective method of effective reduction water-cooling wall wearing and tearing.
Summary of the invention
The objective of the invention is to design a kind of index choked flow frame that is used in the circulating fluidized bed boiler water-cooling wall anti-attrition, it can significantly reduce sticking wall flow speed, effectively stops and alleviates bed material and flying dust weares and teares to water screen tube.
In order to achieve the above object, the technical solution used in the present invention: a kind of index choked flow frame that is used for the circulating fluidized bed boiler water-cooling wall anti-attrition, comprise some water screen tubes and fin, connect by fin between each adjacent water screen tube, it is characterized in that on the wall of water screen tube and fin, being provided with the horizontally disposed or vertically arranged choked flow beam of several groups, be provided with several bitch in the beam body of each choked flow beam, bitch the inner is welded on the fin along choked flow beam arranged direction.
Be provided with reinforcement in described choked flow beam, reinforcement is connected with the outer end of described bitch.
On described bitch and reinforcement, scribble one deck organic material or twine one layer tape.
Described bitch is " V " or "T"-shaped; On the stage casing of described choked flow beam, offer non-straight-through dilatation joint.
The useful effect that the present invention has is: per pass choked flow beam all can obviously reduce the flow velocity of bed material and flying dust, and the choked flow frame that multiple tracks choked flow beam is combined to form can significantly reduce the wearing and tearing of water screen tube, plays the favorable protection effect; The choked flow frame can not cause tangible influence to bed temperature, can not influence vapor (steam) temperature and exhaust gas temperature yet; Can be used with sprayed coating, forming furnace body does not have abrasive effect.
Description of drawings
Below in conjunction with drawings and Examples the present invention is described in further detail.
Fig. 1 is a choked flow girder construction schematic diagram.
Fig. 2 is that Fig. 1 is along the A-A cutaway view.
Fig. 3 is the cross sectional shape schematic diagram of different choked flow beams.
Fig. 4 be Fig. 1 along the B-B cutaway view, show the structural representation of various non-straight-through dilatation joints.
The specific embodiment
As shown in Figure 1 and Figure 2, present embodiment comprises some water screen tubes 5, fin 4 and several group choked flow beams 2, connected by fin 4 between each adjacent water screen tube 5, the choked flow beam is horizontally disposed or be arranged vertically on the wall of water screen tube 5 and fin 4 according to the direction of flue gas, and the choked flow beam arranges that the close more effect that then reduces flue gas flow rate is big more, so, require the bottom closeer when horizontally disposed, top is thinner, and the bottom must be arranged along putting in order circle all around, circle or local layout can be put in order in top, and the beam number is 1～8 road; Spacing, road number and length are set when vertically arranging as required, and available plastic refractory or round steel, square steel, band steel are as choked flow beam material, and vertically the choked flow beam causes that for pulverized-coal fired boiler soot blower, burner etc. the protection of boiler tube wearing and tearing is also very effective.
Be provided with reinforcement 3 and several bitch 1 in each choked flow beam 2, reinforcement 3 arranged direction are consistent with choked flow beam arranged direction, described bitch 1 is " V " or "T"-shaped, bitch 1 the inner is welded on the fin 4 along choked flow beam arranged direction, the bitch outer end connects reinforcement 3, bitch and reinforcement play the effect of supporting and strengthening, and the choked flow beam is connected with fin in conjunction with firm, and the choked flow beam length phase uses and fracture can not occur.On described bitch 1 and reinforcement 3, scribble one deck organic material or twine one layer tape, this organic material layer or adhesive tape layer are along with the automatic scaling loss of meeting in the stove hall temperature-rise period, make the certain space of formation between choked flow beam 2 and bitch and the reinforcement, to avoid causing choked flow beam cracking because of expansion coefficient difference.
Again as shown in Figure 2, on the stage casing of described choked flow beam 2, offer non-straight-through dilatation joint 6.Since choked flow beam material and the coefficient of expansion and water-cooling wall differ bigger, so must offer dilatation joint in the middle of the choked flow beam, its structure should be non-straight-through seam, otherwise sticking wall flow can directly pass dilatation joint causes the local pipe of choked flow beam lower edge heavy wear to occur, and non-straight-through dilatation joint can be a kind of among A among Fig. 4, B, C, the D.
In addition, as shown in Figure 3, be connected with little ramp structure 7 transition between choked flow beam top and the water-cooling wall, can protect the wearing and tearing of abrasive particle bounce-back to water screen tube, choked flow beam bottom is " bracket " structure 9, and the choked flow beam is played the good supporting effect.It on the choked flow beam concave structure 8, but sedimentating dust, can play tangible cushioning effect when the abrasive particle in the sticking wall flow impacts herein and reduce the influence that the abrasive particle bounce-back causes, pass through the inhibitory action of choked flow frame again, abrasive grain speed descends more obvious, the abrasionproof effect is remarkable, wear rate decline 50-80%.
In sum, the present invention compared with prior art has the following advantages:
But 1, the concave structure sedimentating dust on choked flow beam top can when the abrasive particle in the sticking wall flow impacts herein Play obvious cushioning effect and reduce the impact that the abrasive particle bounce-back causes, do through the inhibition of flow blocking rack again With, abrasive grain speed descends more obvious, and the abrasionproof effect is remarkable, wear rate decline 50-80%.
2, the little slope between choked flow beam top and the water-cooling wall can protect the abrasive particle bounce-back to the mill of water screen tube Decrease, the bottom bracket plays good supporting role to the choked flow beam.
3, owing to be provided with bitch bracing frame and reinforcement in the choked flow beam, make the choked flow beam in conjunction with firm, choked flow The beam length phase uses and fracture can not occur.
4, bed temperature can obviously not change, and vapor (steam) temperature and exhaust gas temperature are unchanged.
5, can be used with sprayed coating, forming furnace body does not have abrasive effect.
6, be suitable in, large circulating fluidized bed boiler water-cooling wall abrasionproof.
Claims (7)
1, a kind of index choked flow frame that is used for the circulating fluidized bed boiler water-cooling wall anti-attrition, comprise some water screen tubes (5) and fin (4), connect by fin (4) between each adjacent water screen tube (5), it is characterized in that on the wall of water screen tube (5) and fin (4), being provided with several group horizontally disposed or vertically arranged choked flow beams (2), be provided with several bitch (1) in the beam body of each choked flow beam (2), the inner of each bitch (1) is welded on the fin (4) along choked flow beam arranged direction.
2, a kind of index choked flow frame that is used for the circulating fluidized bed boiler water-cooling wall anti-attrition according to claim 1 is characterized in that being provided with reinforcement (3) in described choked flow beam (2), and reinforcement (3) is connected with the outer end of described bitch (1).
3, a kind of index choked flow frame that is used for the circulating fluidized bed boiler water-cooling wall anti-attrition according to claim 2 is characterized in that scribbling one deck organic material or twines one layer tape on described bitch (1) and reinforcement (3).
4, a kind of index choked flow frame that is used for the circulating fluidized bed boiler water-cooling wall anti-attrition according to claim 3 is characterized in that described bitch (1) is " V " or "T"-shaped.
5, a kind of index choked flow frame that is used for the circulating fluidized bed boiler water-cooling wall anti-attrition according to claim 4 is characterized in that offering non-straight-through dilatation joint (6) on the stage casing of described choked flow beam (2).
6, a kind of index choked flow frame that is used for the circulating fluidized bed boiler water-cooling wall anti-attrition according to claim 5, it is characterized in that being connected with little ramp structure (7) transition between described choked flow beam top and water-cooling wall, choked flow beam bottom is " bracket " structure (9).
7, a kind of index choked flow frame that is used for the circulating fluidized bed boiler water-cooling wall anti-attrition according to claim 6 is characterized in that being on the end face on the described choked flow beam concave structure (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100519455A CN101566341A (en) | 2009-05-21 | 2009-05-21 | Exponential flow-resisting frame used for reducing abrasion of circulating fluidized bed boiler water-cooling wall |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100519455A CN101566341A (en) | 2009-05-21 | 2009-05-21 | Exponential flow-resisting frame used for reducing abrasion of circulating fluidized bed boiler water-cooling wall |
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| Publication Number | Publication Date |
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| CN101566341A true CN101566341A (en) | 2009-10-28 |
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| CNA2009100519455A Pending CN101566341A (en) | 2009-05-21 | 2009-05-21 | Exponential flow-resisting frame used for reducing abrasion of circulating fluidized bed boiler water-cooling wall |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185337A (en) * | 2013-04-02 | 2013-07-03 | 刘少光 | Anti-abrasion and attrition-reducible circulating fluidized bed boiler |
| CN103712205A (en) * | 2014-01-10 | 2014-04-09 | 哈尔滨红光锅炉总厂有限责任公司 | Circulating fluidized bed hot-water boiler free of abrasion and corrosion |
| CN106051753A (en) * | 2016-07-16 | 2016-10-26 | 广东粤电湛江生物质发电有限公司 | Internally-circulating flowing choking and buffering type biomass circulating fluidized bed |
| CN106224946A (en) * | 2016-09-18 | 2016-12-14 | 广西秀美壮乡能源环保有限公司 | A kind of wear-resistance circulation fluidized bed boiler |
| CN106500540A (en) * | 2015-09-06 | 2017-03-15 | 上海上电漕泾发电有限公司 | A kind of method for reducing boiler heating surface abrasion |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201003767Y (en) * | 2007-01-29 | 2008-01-09 | 张全胜 | Circulated fluid bed boiler vertical water cooling wall abrasive-proof groove |
| US20080163792A1 (en) * | 2003-06-06 | 2008-07-10 | Seitz Michael W | Preventing tube failure in boilers |
-
2009
- 2009-05-21 CN CNA2009100519455A patent/CN101566341A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080163792A1 (en) * | 2003-06-06 | 2008-07-10 | Seitz Michael W | Preventing tube failure in boilers |
| CN201003767Y (en) * | 2007-01-29 | 2008-01-09 | 张全胜 | Circulated fluid bed boiler vertical water cooling wall abrasive-proof groove |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185337A (en) * | 2013-04-02 | 2013-07-03 | 刘少光 | Anti-abrasion and attrition-reducible circulating fluidized bed boiler |
| CN103185337B (en) * | 2013-04-02 | 2015-05-20 | 刘少光 | Anti-abrasion and attrition-reducible circulating fluidized bed boiler |
| CN103712205A (en) * | 2014-01-10 | 2014-04-09 | 哈尔滨红光锅炉总厂有限责任公司 | Circulating fluidized bed hot-water boiler free of abrasion and corrosion |
| CN103712205B (en) * | 2014-01-10 | 2015-10-28 | 哈尔滨红光锅炉总厂有限责任公司 | A kind of Circulating Fluidized Bed Hot Water Boiler preventing wearing and tearing and corrode |
| CN106500540A (en) * | 2015-09-06 | 2017-03-15 | 上海上电漕泾发电有限公司 | A kind of method for reducing boiler heating surface abrasion |
| CN106051753A (en) * | 2016-07-16 | 2016-10-26 | 广东粤电湛江生物质发电有限公司 | Internally-circulating flowing choking and buffering type biomass circulating fluidized bed |
| CN106224946A (en) * | 2016-09-18 | 2016-12-14 | 广西秀美壮乡能源环保有限公司 | A kind of wear-resistance circulation fluidized bed boiler |
| CN106224946B (en) * | 2016-09-18 | 2018-10-30 | 广西秀美壮乡能源环保有限公司 | A kind of wear-resistance circulation fluidized bed boiler |
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Application publication date: 20091028 |