CN100513872C - Self-balancing throughflow type material returning device - Google Patents
Self-balancing throughflow type material returning device Download PDFInfo
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- CN100513872C CN100513872C CNB200710120876XA CN200710120876A CN100513872C CN 100513872 C CN100513872 C CN 100513872C CN B200710120876X A CNB200710120876X A CN B200710120876XA CN 200710120876 A CN200710120876 A CN 200710120876A CN 100513872 C CN100513872 C CN 100513872C
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- loosening
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Abstract
A self-balancing through-flow charge returner is provided, which comprises a stage-I loosening plenum, a stage-I loosening nozzle button, a material-falling pipe, an adjusting section, a stage-II loosening air hose, an ash releasing pipe, a spile valve, a horizontal conveying section, an outlet section and a stage-II loosening plenum. The invention is basically characterized in that, two stages of loosening air are provided, the stage-I loosening air is at the adjusting section and inside the central line of the material-falling pipe; air is distributed by a cylindrical (not oriented) nozzle button or an oriented nozzle button; the stage-II loosening air hose is like a flute, passes into the returner from the side of the adjusting section, is located above the ash releasing pipe; the two stages of loosening air distribute air independently, the air pressure of the stage-II loosening air is higher than that of the state-I loosening air. The returner is additionally characterized in that, the included angle between the bottom plate of the adjusting section and the level is 0-15 degree; the through-flow area of the horizontal conveying section is 1/2-1 of the through-flow area of the material-falling pipe; the outlet section is a round or square pipe, the diameter is bigger than that of the material-falling pipe; the outlet section uses a baffle to stop the influence of air flow. The invention is controllable and self balancing, can not only prevent back flowing of air flow in the furnace tank, but also can adjust the flow of solid material, also can solve the instantaneous choking due to small slag by releasing material timely, and is applicable for returning solid particles of circulating fluid bed.
Description
Technical field
The present invention relates to a kind of throughflow type material returning device of self-balancing, belong to mechanical engineering technical field.
Background technology
The loopback of material device is one of three big critical pieces of CFBB, is the indispensable parts in circulation fluidized bed loop.Controllable type on-mechanical valve commonly used has L valve, V valve, U valve etc., have simple in structure, can be in harmonious proportion characteristics such as controllability; Venting valve then comprises closed conveying valve, loop seal, N valve and multiple spot blow valve etc., can concern the flow of autobalance solid particle according to the pressure balance of self, but aeration quantity is very little to the regulating action of solid particle flow.
The relevant patent of retrieval Circulating Fluidized Bed loop back device is also found, in order to regulate the solid particle flow more finely, or minimizing aeration quantity, the technology employing two-tube combination of different-diameter is arranged and have the L valve (number of patent application 02156618.6) of carrying skewed slot, minor diameter is 60-80% of a large-diameter valve, rely on the independent use or in parallel use of different-diameter L valve to form three different flow sections, and it is downward-sloping with 3-7 ° of angles that horizontal pipe reaches 3 backs in draw ratio, begin to arrange the fluidisation blast cap that blast cap adopts the single hole one-way type in the inclined tube bottom from the beginning shear points; It is to reduce L valve material particles to pile up the dead angle that technology is arranged, on standpipe apart from 0.6 times of horizontal tube diameter of horizontal tube center line place inflation (number of patent application 200510028683.2), also have technology to change L valve elbow bend into bend pipe (number of patent application 200510028685.1), and with throat opening flow area partially enclosed (number of patent application 200510028684.7); The U type material returning valve that also has anti-gas blowby is provided with anti-gas blowby aperture (ZL 96242310.6) on the dividing plate between loosening section and the feed back section.
Above-mentioned technology has been done certain improvement to L valve or U type valve feeding back device, can improve its feed back performance to a certain extent, but the problem that can't solve the anti-gas blowby of feeding back device better simultaneously and regulate mass flow, unusual little clinker blockage problem in the process of material handling loopback more easily.
Summary of the invention
The object of the present invention is to provide a kind of throughflow type material returning device of self-balancing, both can prevent burner hearth air-flow anti-channeling, can regulate solid materiel flux in self-balancing ground again, can also solve instantaneous little clinker blockage problem by timely blowing mode.
The present invention is achieved through the following technical solutions:
A kind of throughflow type material returning device of self-balancing, form by material blanking tube, adjusting section, dust leg, push-pull valve, level transportation section, outlet section and loosening wind cloth wind system, it is characterized in that: material blanking tube is cylindrical or square, regulate section floor level inclination alpha and be 0-15 °, dust leg is connected to regulates section, and the push-pull valve sealing is adopted in the bottom.
Material returning device of the present invention is provided with the loosening wind of two-stage, and the loosening blast cap of one-level is positioned to be regulated on the section base plate, and the material blanking tube center line adopts cylindrical (non-directional) blast cap or wind cap with the lining; The loosening airduct of secondary adopts flute shape structure (caliber d), and bourdon's tube feeds material returning device from regulating the section side, is positioned at the dust leg top, the discrepancy in elevation h of loosening airduct center line of secondary and the loosening wind blast cap center line of discharge of one-level
1Bourdon's tube diameter d (h less than 1.5 times
1≤ 1.5d); Horizontal range L between the loosening airduct of secondary and loosening the last blast cap of wind blast cap of one-level
2Bourdon's tube diameter d (L greater than 2 times
2〉=2d); Described two-stage is become flexible wind independence air distribution, and the loosening wind blast of secondary is higher than the loosening wind blast of one-level;
Throughflow type material returning device level transportation section flow area (h of the present invention
3B) be the material blanking tube flow area
Doubly
Level transportation section bottom and the loosening airduct center line discrepancy in elevation h of secondary
22～4 times of (h for the bourdon's tube diameter d
2=(2～4) d), and less than material blanking tube caliber D
1(h
2≤ D
1);
Throughflow type material returning device outlet section of the present invention is pipe or square tube, can vertically or be in tilted layout caliber D
3Be not more than material blanking tube caliber D
1(D
3≤ D
1); Outlet section adopts the influence of deflection plate barrier air; Outlet section and dust leg spacing L
1Smaller or equal to 4 times of bourdon's tube diameter d (L
1≤ 4
d), and be not more than material blanking tube diameter D
1(L
1≤ D
1).
The present invention compared with prior art has the following advantages and beneficial effect: the present invention is by being provided with the loosening wind of relatively independent two-stage, can independent regulation solid particle flow, and automatically realize the flow equilibrium of solid particle by self pressure balance.And the loosening wind of secondary is arranged on outside the material particles nature stocking angle of one-level loosening wind blast cap place formation, and the loosening wind blast of secondary is higher than the loosening wind of one-level, even make material returning device of the present invention less and stop in short-term under the situation of feed back at the level transportation section material, regulate in section and the material blanking tube and still have solid material, can more effectively prevent burner hearth air-flow anti-channeling, guarantee the good operation of feed separation and loop back device.Under loosening wind action, when unusual little clinker was arranged in the solid particle, because of density relationship, little clinker can sink by nature, and the setting of dust leg can in time not influence loopback of material with its discharge easily.
Description of drawings
Fig. 1 is the throughflow type material returning device schematic diagram (outlet section is arranged vertically) of a kind of self-balancing involved in the present invention.
Fig. 2 is the throughflow type material returning device schematic diagram (outlet section is in tilted layout) of a kind of self-balancing involved in the present invention.
Fig. 3 is the throughflow type material returning device schematic top plan view of a kind of self-balancing involved in the present invention: (a) material blanking tube and outlet section are pipe; (b) material blanking tube is a square tube; (c) outlet section is a square tube; (d) material blanking tube and outlet section are square tube.
Fig. 4 is the loosening wind blast cap cap structure schematic diagram of one-level involved in the present invention: (a) the cylindrical cap structure schematic diagram of top cloth wind; (b) along the cylindrical cap structure schematic diagram of tube side multiple spot cloth wind; (c) cylindrical blast cap A-A schematic diagram; (d) wind cap structural representation; (e) wind cap schematic top plan view.
Among the figure: 1-one-level is become flexible the wind air compartment; 2-one-level is become flexible the wind blast cap; 3-material blanking tube: 4-regulate section: 5-secondary becomes flexible airduct; 6-dust leg; 7-push-pull valve; 8-level transportation section; 9-outlet section; 10-horizontal CFBB main chamber; 11-secondary becomes flexible the wind air compartment.
The specific embodiment
Describe concrete structure of the present invention, operation principle and embodiment in detail below in conjunction with accompanying drawing:
The present invention is by material blanking tube 3, adjusting section 4, dust leg 6, push-pull valve 7, level transportation section 8, outlet section 9, the loosening air compartment 1 of one-level and become flexible blast cap 2, secondary becomes flexible air compartment 11 and loosening airduct 5 is formed.CFBB is full of material blanking tube 3 through the solid particle material that material separator separates, and material blanking tube 3 is cylindrical or square, and it is highly minimum for granule materials is wherein flow automatically.Connect under the material blanking tube and regulate section 4, regulate section 4 floor level inclination alpha and be 0-15 °, arranged on it that one-level becomes flexible blast cap 2.The loosening blast cap 2 of one-level is cylindrical (non-directional) blast cap or wind cap, is positioned at the material blanking tube center line with the lining, by loosening air compartment 1 air distribution of one-level.
The present invention also is provided with the loosening wind of secondary, becomes flexible wind facies to independence with one-level, by loosening air compartment 11 air distributions of secondary, can regulate the flow of granule materials effectively.The loosening airduct 5 of secondary adopts bourdon's tube, laterally vertically penetrates and regulates section 4, is positioned at dust leg 6 tops.The loosening airduct 5 of secondary is not higher than the loosening wind blast cap 2 of one-level, the discrepancy in elevation h of loosening wind blast cap 2 center line of discharge of its center line and one-level
1Bourdon's tube diameter d (h less than 1.5 times
1≤ 1.5d).The loosening wind blast of secondary is higher than the loosening wind of one-level, thereby guarantees material forward flow more swimmingly.The loosening airduct 5 of secondary is arranged in outside the natural stocking angle of the loosening wind blast cap place of one-level granule materials, i.e. horizontal range L between the loosening airduct 5 of blast secondary and loosening the last blast cap of wind blast cap (2) of one-level
2Bourdon's tube diameter d (L greater than 2 times
2〉=2d), and even make the present invention not have granule materials or stop in short-term under the situation of loopback of material at level transportation section, material blanking tube 3 and regulate section 4 and guarantee that still granule materials is arranged, thus prevented burner hearth air-flow anti-channeling effectively.
The recirculating fluidized bed granule materials separate and the process of loopback in, or unusual little clinker appears, regulate the dust leg 6 that is provided with on section 4 base plates, push-pull valve 7 by the bottom, can be in time unusual little clinker be discharged, avoid the material blockage problem, thereby can guarantee that loopback of material is smooth and easy carries out.
Under loosening wind action, granule materials is carried toward burner hearth by level transportation section, level transportation section 8 flow area (h
3B) be the material blanking tube flow area
Doubly
Can guarantee that promptly mass transport is required.For guaranteeing pressure balance, level transportation section bottom and the loosening airduct 5 center line discrepancy in elevation h of secondary
22～4 times of (h for the bourdon's tube diameter d
2=(2～4) d), and less than material blanking tube 3 caliber D
1(h
2≤ D
1);
Claims (3)
1. the throughflow type material returning device of a self-balancing, be made up of the loosening air compartment (1) of one-level, the loosening blast cap (2) of one-level, material blanking tube (3), adjusting section (4), the loosening airduct (5) of secondary, dust leg (6), push-pull valve (7), level transportation section (8), outlet section (9) and the loosening air compartment (11) of secondary, it is characterized in that: material blanking tube (3) is a pipe; Regulate section (4) floor level inclination alpha and be 0-15 °, dust leg (6) is connected to regulates section, and push-pull valve (7) sealing is adopted in dust leg (6) bottom; One-level is become flexible blast cap (2) and is positioned on the adjusting section base plate, and the material blanking tube center line is with the lining; Secondary becomes flexible airduct (5) and is positioned at dust leg (6) top; Secondary becomes flexible the discrepancy in elevation h of airduct (5) center line and loosening wind blast cap (2) center line of discharge of one-level
1Less than loosening airduct (5) diameter d of 1.5 times secondarys; Secondary becomes flexible the horizontal range L between airduct (5) and the loosening wind blast cap (2) of one-level
2Greater than loosening airduct (5) diameter d of 2 times secondarys; Level transportation section (8) flow area is the material blanking tube flow area
Doubly; Level transportation section bottom and loosening airduct (5) the center line discrepancy in elevation h of secondary
2Be 2～4 times of loosening airduct (5) diameter d of secondary, and less than material blanking tube caliber D
1Outlet section (9) and dust leg (6) spacing L
1Be less than or equal to loosening airduct (5) diameter d of 4 times of secondarys, and be not more than material blanking tube caliber D
1
2. throughflow type material returning device according to claim 1 is characterized in that: the loosening wind of two-stage is set, and one-level is become flexible blast cap (2) and is adopted wind cap or cylindrical non-directional blast cap; Secondary becomes flexible airduct (5) and adopts flute shape structure; Described two-stage is become flexible wind independence air distribution, and the loosening wind blast of secondary is higher than the loosening wind blast of one-level.
3. throughflow type material returning device according to claim 1, its feature also is: outlet section (9) is a pipe, caliber D
3Be not more than material blanking tube caliber D
1Outlet section (9) is vertical or be in tilted layout the influence of employing deflection plate barrier air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710120876XA CN100513872C (en) | 2007-08-28 | 2007-08-28 | Self-balancing throughflow type material returning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710120876XA CN100513872C (en) | 2007-08-28 | 2007-08-28 | Self-balancing throughflow type material returning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101109505A CN101109505A (en) | 2008-01-23 |
| CN100513872C true CN100513872C (en) | 2009-07-15 |
Family
ID=39041683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200710120876XA Active CN100513872C (en) | 2007-08-28 | 2007-08-28 | Self-balancing throughflow type material returning device |
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| Country | Link |
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| CN (1) | CN100513872C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591577A (en) * | 2013-11-21 | 2014-02-19 | 江苏中容环保有限公司 | Method for mechanical-non-mechanical coupling control of pressure balance of dual-cycle fluid bed |
| CN104696951B (en) * | 2015-01-28 | 2017-01-11 | 中国神华能源股份有限公司 | Boiler-in integrated coupled desulfurization and denitrification method for circulating fluidized bed boiler |
| CN104879749A (en) * | 2015-05-27 | 2015-09-02 | 贵州电力试验研究院 | Material return device anti-blocking device for CFB boiler, and operation method thereof |
| CN110056866B (en) * | 2018-04-16 | 2024-02-09 | 新能能源有限公司 | Fluidized bed secondary cyclone return device and cyclone return control method |
| CN109000221A (en) * | 2018-07-16 | 2018-12-14 | 大连亿斯德制冷设备有限公司 | A kind of coal slime processing method |
| CN111054272B (en) * | 2018-10-17 | 2022-07-12 | 中国石油化工股份有限公司 | Fluidized bed gasification reaction apparatus and method |
| CN111964043B (en) * | 2020-09-01 | 2023-04-07 | 福建省圣新环保股份有限公司 | Novel chicken manure boiler return bed and monitoring method thereof |
| CN112178628A (en) * | 2020-10-30 | 2021-01-05 | 北京热华能源科技有限公司 | Wedge-shaped channel type separating and returning device and multi-process circulating fluidized bed applying same |
-
2007
- 2007-08-28 CN CNB200710120876XA patent/CN100513872C/en active Active
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| Publication number | Publication date |
|---|---|
| CN101109505A (en) | 2008-01-23 |
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Denomination of invention: Self-balancing throughflow type material returning device Effective date of registration: 20140523 Granted publication date: 20090715 Pledgee: Haidian Beijing science and technology enterprise financing Company limited by guarantee Pledgor: BEIJING NOWVA ENERGY TECHNOLOGY Co.,Ltd. Registration number: 2014990000402 |
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Address after: 100084 B709 building, comprehensive research building, Tsinghua University, Beijing, Haidian District Patentee after: Rehua Energy Co.,Ltd. Address before: 100084 B709 building, comprehensive research building, Tsinghua University, Beijing, Haidian District Patentee before: Beijing Rehua Energy Co.,Ltd. Address after: 100084 B709 building, comprehensive research building, Tsinghua University, Beijing, Haidian District Patentee after: Beijing Rehua Energy Co.,Ltd. Address before: 100084 B709 building, comprehensive research building, Tsinghua University, Beijing, Haidian District Patentee before: BEIJING NOWVA ENERGY TECHNOLOGY Co.,Ltd. |