CN109163343B

CN109163343B - Flow equalizing plate structure of inlet flue of waste heat boiler

Info

Publication number: CN109163343B
Application number: CN201811219851.XA
Authority: CN
Inventors: 刘家周; 朱刚峰; 顾全斌; 顾杰; 姜海峰
Original assignee: Wuxi Huaguang Environment and Energy Group Co Ltd
Current assignee: Wuxi Huaguang Environment and Energy Group Co Ltd
Priority date: 2018-10-19
Filing date: 2018-10-19
Publication date: 2023-10-20
Anticipated expiration: 2038-10-19
Also published as: CN109163343A

Abstract

The invention relates to waste heat boiler equipment in the field of energy, in particular to a waste heat boiler inlet flue flow equalizing plate structure which can ensure the reliability of the flow equalizing plate, is not limited by expansion, has less material consumption and low cost, comprises an inlet flue, and is characterized in that the flow equalizing plate comprises at least two flow equalizing plates, the included angle between the flow equalizing plates and a vertical line is an acute angle and is arranged obliquely upwards, two ends of the flow equalizing plates are fixedly connected with a first steel pipe and a second steel pipe, the first steel pipe is connected with the second steel pipe through a first connecting rod, a third steel pipe is arranged below the first connecting rod, the first steel pipe is connected with the third steel pipe through a second connecting rod and the third connecting rod, two ends of the first steel pipe and two ends of the second steel pipe are movably inserted into a mounting support, and the mounting support is fixed on the inner wall of the inlet flue.

Description

Flow equalizing plate structure of inlet flue of waste heat boiler

Technical Field

The invention relates to waste heat boiler equipment in the field of energy, in particular to a flow equalizing plate structure of an inlet flue of a waste heat boiler.

Background

The inlet flue of the waste heat boiler is generally uniform in flue gas flow field by utilizing the shape change of the inlet flue, such as the ways of increasing the length of the flue, changing the angle of the flue, and the like. However, along with the strong market competition, the cost needs to be reduced and the flue length needs to be shortened at present; and environmental protection checking pressure, adding denitration equipment, and needing a very uniform flow field to reach various emission indexes. The temperature of the inlet smoke is about 600 ℃ or even higher, the flow rate of the smoke is high, 50 meters/second or even hundreds of meters/second, the common circular arc-shaped guide plates are placed in the flue, the strength is insufficient, and the guide plates are welded and fixedly arranged, so that the thermal expansion is limited.

Disclosure of Invention

In order to solve the problems of insufficient strength and thermal expansion factors of the existing guide plates, the invention provides a flow equalizing plate structure for high-temperature and high-speed flue gas of an inlet flue of a waste heat boiler, which can ensure the reliability of the flow equalizing plate, is not limited by expansion, and has the advantages of less material consumption and low cost.

The technical scheme is as follows: the utility model provides a waste heat boiler import flue board structure that flow equalizes, its includes the import flue, import flue department is provided with the board that flow equalizes, its characterized in that, the board that flow equalizes includes two at least, the contained angle of board and vertical line that flow equalizes is acute angle and slope upwards arranges, flow equalizes board both ends fixed connection first steel pipe and second steel pipe, first steel pipe with connect through first connecting rod between the second steel pipe, first connecting rod below is provided with the third steel pipe, first steel pipe with between the third steel pipe, the second steel pipe with connect through second connecting rod, third connecting rod respectively between the third steel pipe, first steel pipe, the equal movable cartridge in both ends of second steel pipe are on the erection support, the erection support is fixed in import flue inner wall.

The mounting support is further characterized in that an accommodating cavity is formed in the mounting support, at least three baffles are arranged at the opening of the accommodating cavity, limiting plates are arranged at the end parts of the two ends of the first steel pipe and the second steel pipe, the opening size surrounded by the baffles is larger than the pipe diameter size of the first steel pipe and the second steel pipe and smaller than the limiting plate size, the limiting plates on the first steel pipe and the second steel pipe extend into the accommodating cavity, and the accommodating cavity size is larger than the limiting plate size;

the flow equalizing plate is a flat plate or a pore plate;

the deflectors are arranged in parallel.

After the structure of the invention is adopted, the two ends of the flow equalizing plate are fixed on the first steel pipe and the second steel pipe, and the truss structure is formed among the first steel pipe, the second steel pipe and the third steel pipe through the connecting rods, and the two ends of the first steel pipe and the second steel pipe are movably inserted on the mounting support, so that the heat expansion can be absorbed, the reliability of the flow equalizing plate is effectively ensured, the structure is simple, and the cost is low.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

fig. 2 is a schematic diagram of a flow equalization plate mounting structure;

FIG. 3 is a schematic view of the structure of the mounting support of the first steel pipe;

FIG. 4 is a schematic view in the direction A in FIG. 3;

fig. 5 is a schematic diagram of a flow equalizing plate with an orifice plate structure.

Detailed Description

Referring to fig. 1 and 2, an inlet flue flow equalizing plate structure of a waste heat boiler comprises an inlet flue 1, three flow equalizing plates 2 which are arranged in parallel are arranged at the inlet flue 1, the included angle between each flow equalizing plate 2 and a vertical line is alpha, the flow equalizing plates are arranged obliquely upwards, alpha is an acute angle, 60-75 degrees are generally selected, two ends of each flow equalizing plate 2 are fixedly connected with a first steel pipe 3 and a second steel pipe 4, the first steel pipe 3 and the second steel pipe 4 are connected through a first connecting rod 5, a third steel pipe 6 is arranged below the first connecting rod 5, the first steel pipe 3 and the third steel pipe 6 and the second steel pipe 4 and the third steel pipe 6 are respectively connected through a second connecting rod 7 and a third connecting rod 8, two ends of each first steel pipe 3 and two ends of each second steel pipe 4 are movably inserted on a mounting support 9, and the mounting support 9 is fixed on the inner wall of the inlet flue 1.

The specific structure of the mounting support 9 is as follows: the mounting support 9 is provided with a containing cavity 10, four baffle plates 11 are arranged at the opening of the containing cavity 10, limiting plates 12 are arranged at the end parts of two ends of the first steel pipe 3 and the second steel pipe 4, the opening size surrounded by the baffle plates 11 is larger than the pipe diameter size of the first steel pipe 3 and the second steel pipe 4 and smaller than the size of the limiting plates 12, the limiting plates 12 on the first steel pipe 3 and the second steel pipe 4 extend into the containing cavity 10, the size of the containing cavity 10 is larger than the size of the limiting plates 12, so that the limiting plates can freely move in the containing cavity and are limited by the baffle plates 11, and the limiting plates cannot be separated from the containing cavity 10.

The flow equalizing plate 2 can be a flat plate or an orifice plate, and fig. 3 is a schematic diagram of the orifice plate structure.

The position, size and angle of the flow equalizing plate 2 are determined according to CFD flow field simulation to ensure more uniform flow, and the flow equalizing plate is arranged in parallel.

Claims

1. The utility model provides a waste heat boiler import flue board structure that flow equalizes, its includes the import flue, import flue department is provided with the board that flow equalizes, its characterized in that, the board that flow equalizes includes two at least, the contained angle of board and vertical line that flow equalizes is acute angle and slope upwards arranges, flow equalizes board both ends fixed connection first steel pipe and second steel pipe, first steel pipe with connect through first connecting rod between the second steel pipe, first connecting rod below is provided with the third steel pipe, first steel pipe with between the third steel pipe, the second steel pipe with connect through second connecting rod, third connecting rod respectively between the third steel pipe, first steel pipe, the equal movable cartridge in both ends of second steel pipe are on the erection support, the erection support is fixed in import flue inner wall.

2. The flow equalizing plate structure of an inlet flue of a waste heat boiler according to claim 1, wherein the mounting support is provided with a containing cavity, at least three baffles are arranged at the opening of the containing cavity, limiting plates are arranged at the end parts of two ends of the first steel pipe and the second steel pipe, the opening size surrounded by the baffles is larger than the pipe diameter size of the first steel pipe and the second steel pipe and smaller than the limiting plate size, and the limiting plates on the first steel pipe and the second steel pipe extend into the containing cavity, and the size of the containing cavity is larger than the size of the limiting plates.

3. The flow equalizing plate structure of an inlet flue of a waste heat boiler according to claim 1, wherein the flow equalizing plate is a flat plate or an orifice plate.

4. The flow equalizing plate structure of an inlet flue of a waste heat boiler according to claim 1, wherein the flow equalizing plates are arranged in parallel.