CN201100635Y - A self-balanced flow return feeder - Google Patents

Abstract

A self-balanced thruflow refeed device comprises a primary loosening wind chamber, a primary loosening hood, a blanking tube, an adjusting section, a secondary loosening air-duct, an ash discharging tube, a damper valve, a horizontal conveying segment, an outlet segment and a secondary loosening wind chamber. The self-balanced thruflow refeed device is characterized in that two levels of loosening wind are set, the primary loosening wind is located on the adjusting section inside the central line of the blanking tube, and wind is allocated using a cylindrical (non-directional) hood or directional hood; a flute structure is used by the secondary loosening air-duct which is connected into the refeed device from the side surface of the adjusting section and located on the ash discharging tube, further wind allocation is separately processed by the two levels of loosening wind, and the wind pressure of the secondary loosening wind is higher than the wind pressure of the primary loosening wind. The refeed device is also characterized in that the included angle of the bottom board of the adjusting section to the horizontal surface is 0-15 degrees, and the thruflow area of the horizontal conveying segment is between half of the thruflow area of the blanking tube and one-fold of the thruflow area of the blanking tube, then the outlet segment is a round tube or a square tube whose diameter is not longer than the diameter of the blanking tube, further wind current influence is blocked by a baffle plate used on the outlet segment. The self-balanced thruflow refeed device has the advantages of controllable and self-balanced, the reverse wind current in a fire box is avoided, and the solid material flow is adjusted, then the problem of instant small slag blocking is solved by instant discharging method, further the self-balanced thruflow refeed device is applicable to a loopback of solid granular materials of a circulating fluidized bed.

Description

A kind of throughflow type material returning device of self-balancing

Technical field

The utility model relates to a kind of throughflow type material returning device of self-balancing, belongs 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 the 60-80% of 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 angle 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.

The utility model content

The purpose of this utility model 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 utility model 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, regulating section floor level inclination alpha is 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 utility model 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 utility model ₃B) be the material blanking tube flow area Doubly $(\frac{1}{2}\left(\frac{\mathrm{\&pi;}}{4}{{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="S2007201728295E00011.png,S2007201728295E00021.png"\; state="\{\{state\}\}">D</figure-callout>}}_1}^2\right)\&le;{\mathrm{<figure-callout\; id="3"\; label="h"\; filenames="S2007201728295E00011.png"\; state="\{\{state\}\}">h</figure-callout>}}_3\&CenterDot;B\&le;\frac{\mathrm{\&pi;}}{4}{{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="S2007201728295E00011.png,S2007201728295E00021.png"\; state="\{\{state\}\}">D</figure-callout>}}_1}^2);$ 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 utility model 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≤ 4d), and be not more than material blanking tube diameter D ₁(L ₁≤ D ₁).

The utility model compared with prior art, have the following advantages and beneficial effect: the utility model 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 described in the utility model 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 the related a kind of self-balancing of the utility model.

Fig. 2 is the throughflow type material returning device schematic diagram (outlet section is in tilted layout) of the related a kind of self-balancing of the utility model.

Fig. 3 is the throughflow type material returning device schematic top plan view of the related a kind of self-balancing of the utility model: (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 the related one-level of the utility model: (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; 30-material blanking tube; 4-adjusting 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 utility model, operation principle and embodiment in detail below in conjunction with accompanying drawing:

The utility model 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, regulating section 4 floor level inclination alpha is 0-15 °, has 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 utility model 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 utility model 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 $(\frac{1}{2}\left(\frac{\mathrm{\&pi;}}{4}{{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="S2007201728295E00011.png,S2007201728295E00021.png"\; state="\{\{state\}\}">D</figure-callout>}}_1}^2\right)\&le;{\mathrm{<figure-callout\; id="3"\; label="h"\; filenames="S2007201728295E00011.png"\; state="\{\{state\}\}">h</figure-callout>}}_3\&CenterDot;B\&le;\frac{\mathrm{\&pi;}}{4}{{\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="S2007201728295E00011.png,S2007201728295E00021.png"\; state="\{\{state\}\}">D</figure-callout>}}_1}^2),$ 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);

Outlet section 8 stretches into inboard wall of burner hearth, 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) can satisfy the mass transport requirement, but the influence of the employing barrier air of deflection plate guarantees that mass transport is smooth and easy; Outlet section 8 and dust leg 6 spacing L ₁Smaller or equal to 4 times of bourdon's tube diameter d (L ₁≤ 4d), and be not more than material blanking tube 3 diameter D ₁(L ₁≤ D ₁).

Claims (4)

1. the throughflow type material returning device of a self-balancing is characterized in that: this material returning device by the loosening air compartment (1) of one-level, the loosening blast cap (2) of one-level, material blanking tube (3), regulate section (4), the loosening airduct (5) of secondary, dust leg (6), push-pull valve (7), level transportation section (8), outlet section (9) and secondary and become flexible air compartment (11) and form; Material blanking tube (3) is pipe or square tube; Regulating section (4) floor level inclination alpha is 0-15 °, and dust leg (6) is connected to regulates section, and push-pull valve (7) sealing is adopted in the bottom.

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 positioned on the adjusting section base plate, and the material blanking tube center line adopts cylindrical (non-directional) blast cap or wind cap with the lining; Secondary becomes flexible airduct (5) and adopts flute shape structure, and bourdon's tube is positioned at the dust leg top, and 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 ₁Bourdon's tube diameter d (h less than 1.5 times ₁≤ 1.5d); Secondary becomes flexible the horizontal range L between airduct (5) and the loosening wind blast cap (2) 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.

3. throughflow type material returning device according to claim 1 is characterized in that: level transportation section (8) flow area (h ₃B) be the material blanking tube flow area

Doubly $(\frac{1}{2}\left(\frac{\mathrm{\&pi;}}{4}{D_1}^2\right)\&le;h_3\&CenterDot;B\&le;\frac{\mathrm{\&pi;}}{4}{D_1}^2);$ Level transportation section bottom and loosening airduct (5) the 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).

4. throughflow type material returning device according to claim 1, its feature also is: outlet section (8) is pipe or square tube, caliber D ₃Be not more than material blanking tube caliber D ₁(D ₃≤ D ₁); Outlet section (8) can vertically or be in tilted layout, and adopts the influence of deflection plate barrier air; Outlet section (8) and dust leg (6) spacing L ₁Smaller or equal to 4 times of bourdon's tube diameter d (L ₁≤ 4d), and be not more than material blanking tube diameter D ₁(L ₁≤ D ₁).

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