阅读说明：本技术 多烟道汇流结构 (Multi-flue converging structure ) 是由 赵凤祥 王正峰 王泽辉 于 2020-03-18 设计创作，主要内容包括：本申请公开了一种多烟道汇流结构,烟道汇流管与所述引风机相互垂直,所述烟道与所述烟道汇流管相互垂直,所述引风机与所述烟道相互垂直。使得烟道与烟囱的距离由烟道的长度缩短为烟道的直径,引风机与烟囱的距离由引风机的长度缩短为引风机的直径,极大缩短了烟道和引风机与烟囱之间的直线距离。将多烟道汇流结构横向安装于烟囱进口水平烟道框架前的零米地面,经计算优化后的烟道布置使得烟道与烟囱之间的纵向距离减少了40米,节约了制造成本以及占地面积。各个烟道通过烟道汇流管引风机连接,省去了现有烟道与引风机的连接处的90°弯头,烟气阻力降低约270Pa,每台引风机每年可节约电功率约810000kW。(The application discloses many flues structure of converging, the flue collecting pipe with draught fan mutually perpendicular, the flue with flue collecting pipe mutually perpendicular, the draught fan with flue mutually perpendicular. The distance between the flue and the chimney is shortened to the diameter of the flue by the length of the flue, the distance between the induced draft fan and the chimney is shortened to the diameter of the induced draft fan by the length of the induced draft fan, and the linear distance between the flue, the induced draft fan and the chimney is greatly shortened. The multi-flue converging structure is transversely installed on the zero meter ground in front of a horizontal flue frame at the inlet of a chimney, and the longitudinal distance between the flue and the chimney is reduced by 40 meters through the calculated and optimized flue arrangement, so that the manufacturing cost and the occupied area are saved. Each flue is connected with the induced draft fan through a flue collecting pipe, a 90-degree elbow at the joint of the existing flue and the induced draft fan is omitted, the smoke resistance is reduced by about 270Pa, and each induced draft fan can save about 810000kW of electric power each year.)

1. The utility model provides a multi-flue structure that converges, its characterized in that includes at least a set of multi-flue unilateral subassembly that converges, multi-flue unilateral subassembly that converges includes draught fan, flue collecting pipe and many flues, the flue collecting pipe connect in on the draught fan, many the flue connect respectively in on the flue collecting pipe, the flue collecting pipe with draught fan mutually perpendicular, the flue with flue collecting pipe mutually perpendicular, the draught fan with flue mutually perpendicular.

2. The multi-flue single-side manifold structure of claim 1, wherein the number of said plurality of flues is three, and said three flues are respectively connected to said flue manifold.

3. The multi-flue single-side flow concentration structure according to claim 1, wherein a maintenance single hanger rail is arranged on the flue gas collection pipe, and the maintenance single hanger rail is installed in the axial direction of the induced draft fan.

4. The multi-flue single-side junction structure according to any one of claims 1 to 3, wherein at least one set of multi-flue single-side junction assemblies comprises two sets of multi-flue single-side junction assemblies, the multi-flue single-side junction structure further comprises an induced draft fan manifold, and the two sets of multi-flue single-side junction assemblies are symmetrically connected to two sides of the induced draft fan manifold.

5. The multi-flue single-side manifold structure of claim 4, wherein the flue manifold comprises two symmetrically arranged connecting pipes, the connecting pipes comprise a first pipe section and a second pipe section, and the first pipe sections are communicated with each other for communicating with a chimney; the second pipe sections are respectively communicated with two sides of the first pipe sections and are used for being communicated with the induced draft fan.

6. The structure of claim 5, wherein the first tube segment and the second tube segment are perpendicular to each other, and a circular arc transition section is provided at a joint of the first tube segment and the second tube segment.

Technical Field

The invention relates to the field of arrangement of flue gas pipelines in a thermal power plant, in particular to a multi-flue confluence structure.

Background

The conventional arrangement of thermal power draught fan is vertically placed, and the draught fan axial is unanimous with electrostatic precipitator exit axial promptly, and million unit boiler unilateral dust remover export generally sets up three flues, and waste gas waste dust gets into the draught fan import in the flue, gets into the chimney through the horizontal flue before the chimney import and emits into the atmosphere after the draught fan pressurization. Because the body of the induced draft fan and the outlet flues have certain horizontal length, the three flues at the outlet of the dust remover occupy certain space when being converged, and the vertical arrangement occupies large distance, thereby increasing the vertical depth from the boiler to the chimney, having large occupied area and higher manufacturing cost.

Disclosure of Invention

In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a multi-duct collecting structure that shortens the longitudinal depth from the boiler to the chimney, thereby reducing the floor space and the manufacturing cost.

The invention provides a multi-flue converging structure which is characterized by comprising at least one group of multi-flue single-side converging assemblies, wherein each multi-flue single-side converging assembly comprises an induced draft fan, a flue collecting pipe and a plurality of flues, the flue collecting pipe is connected to the induced draft fan, the flues are respectively connected to the flue collecting pipes, the flue collecting pipes are perpendicular to the induced draft fan, the flues are perpendicular to the flue collecting pipes, and the induced draft fan is perpendicular to the flues.

Furthermore, the number of the flues is three, and the three flues are respectively connected to the flue collecting pipe.

Furthermore, a single maintenance hanger rail is arranged on the flue collecting pipe and is installed on the axis direction of the induced draft fan.

Further, at least a set of many flues unilateral subassembly that converges includes two sets of many flues unilateral subassembly that converges, many flues unilateral structure that converges still includes the draught fan collecting pipe, and is two sets of many flues unilateral converge subassembly symmetric connection in draught fan collecting pipe both sides.

Furthermore, the flue collecting pipe comprises two connecting pipelines which are symmetrically arranged, each connecting pipeline comprises a first pipe section and a second pipe section, and the first pipe sections are communicated with each other and are used for communicating a chimney; the second pipe sections are respectively communicated with two sides of the first pipe sections and are used for being communicated with the induced draft fan.

Furthermore, the first pipe section and the second pipe section are perpendicular to each other, and an arc transition section is arranged at the joint of the first pipe section and the second pipe section.

Compared with the prior art, the invention has the beneficial effects that:

in the technical scheme of the invention, the flue collecting pipe is vertical to the induced draft fan, the flue is vertical to the flue collecting pipe, and the induced draft fan is vertical to the flue. The distance between the flue and the chimney is shortened to the diameter of the flue by the length of the flue, the distance between the induced draft fan and the chimney is shortened to the diameter of the induced draft fan by the length of the induced draft fan, and the linear distance between the flue, the induced draft fan and the chimney is greatly shortened. The multi-flue converging structure is transversely installed on the zero meter ground in front of a horizontal flue frame at the inlet of a chimney, and the longitudinal distance between the flue and the chimney is reduced by 40 meters through the calculated and optimized flue arrangement, so that the manufacturing cost and the occupied area are saved. Each flue is connected with the induced draft fan through a flue collecting pipe, a 90-degree elbow at the joint of the existing flue and the induced draft fan is omitted, the smoke resistance is reduced by about 270Pa, and each induced draft fan can save about 810000kW of electric power each year.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention to its proper form. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is a perspective view of a multi-duct single-side junction assembly according to an embodiment of the present invention;

fig. 2 is a three-dimensional structure diagram of a multi-duct junction structure according to an embodiment of the present invention;

fig. 3 is a perspective structural view of a collecting pipe of an induced draft fan according to an embodiment of the present invention.

In the figure: 1-a multi-flue single-side confluence assembly, 11-an induced draft fan, 12-a flue collecting pipe, 13-a flue, 14-a maintenance single hanging rail, 2-an induced draft fan collecting pipe, 21-a connecting pipeline, 211-a first pipe section and 212-a second pipe section.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

As mentioned in the background art, the conventional arrangement of thermal power induced draft fan is vertically placed, namely the axial direction of induced draft fan is the same with the axial direction of the inlet and outlet of electric dust remover, the outlet of one-side dust remover of million unit boiler is generally provided with three flues, waste gas and dust in the flue enter the inlet of induced draft fan, enter the chimney through the horizontal flue before the inlet of chimney and discharge into the atmosphere after the induced draft fan pressurizes. Because the body of the induced draft fan and the outlet flues have certain horizontal length, the three flues at the outlet of the dust remover occupy certain space when being converged, and the vertical arrangement occupies large distance, thereby increasing the vertical depth from the boiler to the chimney and occupying large area.

Therefore, how to shorten boiler to the vertical degree of depth of many flues confluence structure between the chimney, reduce area, reduce manufacturing cost and will become the improvement direction of this application, the design of this application is: the flue collecting pipe is mutually perpendicular to the induced draft fan, the flue is mutually perpendicular to the flue collecting pipe, and the induced draft fan is mutually perpendicular to the flue. The distance between the flue and the chimney is shortened to the diameter of the flue from the length of the flue, the distance between the induced draft fan and the chimney is shortened to the diameter of the induced draft fan from the length of the induced draft fan, and the linear distance between the flue and the induced draft fan and the chimney is shortened.

Referring to fig. 1-3, a multi-duct manifold structure of the present application is shown.

As shown in fig. 1, a multi-flue structure of converging, including at least a set of multi-flue unilateral subassembly 1 that converges, multi-flue unilateral subassembly 1 that converges includes draught fan 11, flue collecting pipe 12 and many flues 13, flue collecting pipe 12 connect in on the draught fan 11, many flue 13 connect respectively in on the flue collecting pipe 12, flue collecting pipe 12 with draught fan 11 mutually perpendicular, flue 13 with flue collecting pipe 12 mutually perpendicular, draught fan 11 with flue 13 mutually perpendicular.

The multi-flue 13 confluence structure is transversely installed on the zero meter ground in front of a horizontal flue frame at the inlet of a chimney, the distance between an original flue and the chimney is 54.3 meters through calculation, the optimized flue is arranged, the distance between the flue and the chimney is shortened to 12.5 meters, the longitudinal distance of about 40 meters is reduced, an independent draught fan frame is omitted, the longitudinal distance of a main workshop is greatly reduced, the floor area is greatly reduced, steel can be greatly saved, and the manufacturing cost is reduced.

As shown in fig. 2, in a preferred embodiment, the at least one set of multi-flue single-side junction assembly 1 includes two sets of multi-flue single-side junction assemblies 1, the multi-flue single-side junction structure further includes an induced draft fan junction pipe 2, and the two sets of multi-flue single-side junction assemblies 1 are symmetrically connected to two sides of the induced draft fan junction pipe 2. The two draught fans 11 are arranged in such a way that the total flue is shortened, and the two draught fans are coordinated, unified, compact and orderly with the arrangement of desulfurization and coal conveying.

It should be noted that the positions and connection modes of the induced draft fan 11, the flue collecting pipe 12 and the plurality of flues 13 of the two-side multi-flue one-side collecting assembly 1 are completely the same.

As shown in fig. 3, in the above embodiment, the flue manifold 12 includes two symmetrically arranged connecting pipes 21, the connecting pipe 21 includes a first pipe section 211 and a second pipe section 212, and the first pipe sections 211 are communicated with each other for communicating with the chimney; the second pipe sections 212 are respectively communicated with two sides of the first pipe sections 211 and are used for being communicated with the induced draft fan 11. Preferably, the first pipe section 211 and the second pipe section 212 are perpendicular to each other, and a circular arc transition section is provided at a connection position of the first pipe section 211 and the second pipe section 212.

In the above embodiment, the number of the flues 13 is three, and the three flues 13 are respectively connected to the flue collecting pipe 12. The flue 13 is connected with the induced draft fan 11 through the flue collecting pipe 12, compares with million units induced draft fan 11 and its exit flue arrangement mode in the past, reduces 3 elbows of 90 degrees that are connected with the induced draft fan, and the flue gas resistance reduces about 270Pa, and preliminary estimate can practice thrift about 810000kW of fan electric power every year for every fan, and every unit includes two induced draft fans 11, can practice thrift about 1782000kW of fan electric power totally every year.

In the above embodiment, the flue collecting pipe 12 is provided with a single maintenance hanger rail 14, and the single maintenance hanger rail 14 is installed on the axial direction of the induced draft fan 11. Can transversely hang out impeller and motor and put on ground, do not have the negative influence to the maintenance of draught fan 11 and the flow of flue gas simultaneously, the fan is overhauld conveniently, and the flue gas flow state is smooth and easy.

It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.