CN203517782U

CN203517782U - Sealed material returning valve capable of controlling material returning in both directions

Info

Publication number: CN203517782U
Application number: CN201320542609.2U
Authority: CN
Inventors: 段伦博; 段元强; 陈晓平; 吴新; 赵长遂
Original assignee: Southeast University
Current assignee: Southeast University
Priority date: 2013-09-02
Filing date: 2013-09-02
Publication date: 2014-04-02
Anticipated expiration: 2023-09-02

Abstract

The utility model relates to a sealed material returning valve capable of controlling material returning in both directions. Ascending sections (2) at the upper part of the sealed material returning valve are arranged at two sides of a descending section (1), respectively, and the sections are separated by clapboards; at least one overflow mouth (21) is formed in the side wall of the top of each ascending section (2); each overflow mouth (21) is connected with a material returning section (3); a wind chamber (4) of a wind distributing device is arranged at the lower part of the sealed material returning valve and is provided with a wind cap type wind distributing plate (45); the lower part of the wind distributing plate is separated into n independent wind chambers (42) through clapboards; each independent wind chamber (42) is connected with an wind pipe (43) capable of independently controlling the open/close and the wind volume. The material returning valve is capable of realizing the bidirectional material returning and controlling the material returning amount of two sides in a certain range and can be applied to double fluidized beds, chemical-looping combustion systems and the like.

Description

A kind of sealing returning charge valve that can two-way control returning charge

Technical field

The utility model relates to a kind of sealing returning charge valve that can two-way control returning charge, belongs to energy technology and mechanical engineering technology crossing domain.

Background technology

Combustion chamber, separator and solid material feeding-back device are the critical pieces that CFBB is different from other types boiler, the basic task of loop back device is that the high-temperature solid particle of separator separation is stably sent back in the combustion chamber that pressure is higher, and prevents that gas anti-channeling from entering separator.

General volume control device can be divided into mechanical valve and the large class of on-mechanical valve two.On-mechanical valve, without the effect of any extraneous mechanical force, only adopts gas push Motion of solid particle, realizes under worst hot case simply, conveying solid material reliably.Due to on-mechanical valve movement-less part, so thereby it is simple in structure, flexible operation is widely used in CFBB.Loop seal is most widely used a kind of loopback of material device in CFBB at present, it is comprised of bubbling fluidized bed and the separator standpipe of a carry potential overflow pipe, between the two, there is a dividing plate, bottom is connected by a horizontal segment, each section of bottom is all with the air-distribution device of air distribution plate form, in order to pass into fluidized wind.The high-temperature material that separator is separated enters material returning device through standpipe, through horizontal segment, enters bubbling bed, and under fluidisation wind action, flows out from bottom to top from overfall, flows into returning charge section.

Normally used loop seal only can unidirectional returning charge, and in valve, aeration quantity is very little to the regulating action of solid particle flow, and valve is according to the pressure balance relation flow of balance solid particle automatically of self.But while there is two fluidized-bed reactors in parallel in system, as in burning chemistry chains technique or gasification-burning multi-production process, recycle stock need to be distributed between two reactors, at this moment just require the two-way returning charge simultaneously of returning charge valve, and each is controlled within the specific limits to returning charge ratio, conventional sealing returning charge valve cannot meet this requirement.In order to address the above problem, a kind of sealing returning charge valve that can two-way control returning charge is proposed.

Summary of the invention

Technical problem: the purpose of this utility model is to provide a kind of sealing returning charge valve that can two-way control returning charge, the apparatus system such as that this returning charge valve can be applicable to is double-fluidized-bed, burning chemistry chains, can realize two-way returning charge, and control within the specific limits the returning charge amount of both sides.

Technical scheme: the sealing returning charge valve of two-way control returning charge of the present utility model comprises: a vertical descending branch, two vertical ascent stages, the air compartment of bottom, and corresponding air-distribution device; The ascent stage that is positioned at described sealing returning charge valve top is arranged in descending branch both sides, between each section, with dividing plate, separates, and at each ascent stage top sidewall, is provided with at least one overfall, and each overfall all has a returning charge section to be attached thereto; Described sealing returning charge valve bottom is provided with the air compartment of air-distribution device, and this air compartment is provided with hood-type grid plate, and air distribution plate bottom is divided into n independent air compartment by dividing plate, and each independent air compartment is connected with one can independently control the airduct opening and closing with air quantity.

Described air compartment has n to prop up can independently to control the airduct opening and closing with air quantity to be attached thereto, and is connected with the vertical arm of m root on every branch wind pipe, and vertically arm top is blast cap.

Airduct is low inside and high outside setting, is 30～45 degree angles with horizontal direction.

Between airduct and vertical arm, by compensator, flexibly connect.

Descending branch airduct is all opened, make to circulate ash material fluidisation moving to the both sides ascent stage, all or part of unlatching of both sides ascent stage airduct, makes material stagnate local generation of ascent stage, and control the returning charge amount by overfall with this, reach the object of two-way control returning charge.

Beneficial effect: 1) sealing returning charge valve is by regulating airduct tolerance, can realize distribution, the adjusting to high-temp circulating ash and control, to meet the technological requirements of system to two-way returning charge such as double-fluidized-bed, and can to both sides returning charge amount, regulate according to the working conditions change of system;

2) sealing returning charge valve arrangement is simple, easy to operate, not easy to wear, and movement-less part, mechanical breakdown can not occur yet.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the schematic diagram of independent air compartment Apoplexy cap

Fig. 3 is for can independently controlling the air duct structure schematic diagram opening and closing with air quantity

Fig. 4 is structural representation of the present utility model, basic identical with Fig. 1.

Fig. 5 be between vertical arm and airduct compensator flexibly connect schematic diagram

In figure, have: the air compartment 4 of vertical descending branch 1, vertical ascent stage 2, overfall 21, returning charge section 3, inner bottom part, blast cap 41, the air compartment 42 of independently cutting apart, airduct 43, vertical arm 44, hood-type grid plate 45.

The specific embodiment

Embodiment 1

Be embodiment 1 as shown in Figure 1,2 and 3, sealing returning charge valve that can two-way control returning charge, comprises that the air compartment 4 of a descending branch 1, two ascent stage 2 and bottom is connected with former three, and material returning device main body is rectangular structure; The cross section of ascent stage 2 is rectangle, and returning charge section 3 is connected with the ascent stage 2 by overfall 21, and the overfall 21 of both sides ascent stage 2 is highly equal; Air compartment 4 adopts hood-type grid plate 45, and is divided into n independent air compartment 42 by dividing plate, and each independent air compartment 42 has one can independently regulate the airduct 43 of air quantity to be attached thereto.

Recycle stock, from separator is separated, is delivered to descending branch 1 through standpipe, and under the fluidized wind effect that comes from blast cap 41, mobile to the ascent stage 2 of both sides, material produces fluidisation in the ascent stages 2, and enters returning charge section 3 by overfall 21; Fluidized wind is by can independently regulating the airduct 43 of air quantity to send into independent air compartment 42, and process air distribution plate, from blast cap 41 ejections; The corresponding airduct 43-1 of descending branch 1 standard-sized sheet, make material to two side flow, the airduct 43-2 of ascent stages 2 correspondence partly opens, and makes material local stagnation of ascent stage 2, and by regulating unlatching quantity and the air quantity of airduct 43, reach the object of controlling two-way returning charge amount.

Embodiment 2

Be embodiment 2 as shown in Figure 4,5, sealing returning charge valve that can two-way control returning charge, comprises that a descending branch 1, two ascent stage 2 is connected the air compartment 4 of three bottom with one, and material returning device main body is rectangular structure; The cross section of ascent stage 2 is rectangle, and returning charge section 3 is connected with the ascent stage 2 by overfall 21, and the overfall 21 of both sides ascent stage 2 is highly equal; Air compartment 4 has n to prop up can independently to regulate the airduct 43 of air quantity to be attached thereto, airduct 43 is 30～45 degree angles to discharge the leakage slag of blast cap with horizontal direction, on every branch wind pipe 43, be connected with the vertical arm 44 of m root, vertically arm 44 tops are blast cap 41, and vertically

arm

44 and 43 employing compensators of airduct flexibly connect.

Recycle stock, from separator is separated, is delivered to descending branch 1 through standpipe, and under the fluidized wind effect that comes from blast cap 41, mobile to the ascent stage 2 of both sides, material produces fluidisation in the ascent stages 2, and enters returning charge section 3 by overfall 21; Fluidized wind is by can independently regulating airduct 43 and the connected vertical arm 44 of air quantity, from blast cap 41 ejections; The corresponding airduct 43-1 of descending branch 1 standard-sized sheet, make material to two side flow, the airduct 43-2 of ascent stages 2 correspondence partly opens, and makes material local stagnation of ascent stage 2, and by regulating unlatching quantity and the air quantity of airduct 43, reach the object of controlling two-way returning charge amount.

Claims

1. a sealing returning charge valve that can two-way control returning charge, is characterized in that, sealing returning charge valve comprises: a vertical descending branch (1), two vertical ascent stages (2), the air compartment of bottom (4), and corresponding air-distribution device; The ascent stage (2) that is positioned at described sealing returning charge valve top is arranged in descending branch (1) both sides, between each section, with dividing plate, separate, at each ascent stage (2) top sidewall, be provided with at least one overfall (21), and each overfall (21) all there is a returning charge section (3) to be attached thereto; Described sealing returning charge valve bottom is provided with the air compartment (4) of air-distribution device, this air compartment (4) is provided with hood-type grid plate (45), hood-type grid plate bottom is divided into n independent air compartment (42) by dividing plate, and each independent air compartment (42) is connected with one can independently control the airduct (43) opening and closing with air quantity.

2. a kind of sealing returning charge valve that can two-way control returning charge according to claim 1, it is characterized in that: described air compartment (4) has n to prop up can independently to control the airduct (43) opening and closing with air quantity to be attached thereto, on every branch wind pipe (43), be connected with the vertical arm of m root (44), vertically arm (44) top is blast cap (41).

3. by a kind of sealing returning charge valve that can two-way control returning charge claimed in claim 2, it is characterized in that, airduct (43) is low inside and high outside setting, is 30～45 degree angles with horizontal direction.

4. by a kind of sealing returning charge valve that can two-way control returning charge claimed in claim 2, it is characterized in that, between airduct (43) and vertical arm (44), by compensator, flexibly connect.