CN104197351A - Shell structure of high temperature flue gas baffle door - Google Patents

Abstract

The invention belongs to the technical field of waste heat boilers, and particularly relates to a high-temperature flue gas damper shell structure which comprises a base, a lower shell and an upper shell, wherein the lower shell is fixedly connected to the base through a bottom plate, the upper shell is fixedly connected with the lower shell through a split connecting flange, the open end of the upper shell is connected with an upper sealing head, the upper shell is provided with a first sealing air inlet pipe communicated with an inner cavity of the shell, the upper sealing head is connected with a second sealing air inlet pipe, and a bearing seat is arranged at the joint of the upper sealing head and the upper shell. The product of the invention adopts a split structure design, is convenient for transportation and assembly operation, and is also convenient for the operations of filling the fiber board in the shell and covering the lining board on the fiber board.

Description

Shell structure of high temperature flue gas baffle door

technical field

The invention belongs to the technical field of waste heat boilers, in particular to a shell structure of a high-temperature flue gas baffle door.

Background technique

Waste heat boiler, as the name implies, refers to a boiler that uses waste heat in waste gas, waste or waste liquid in various industrial processes and the heat generated by the combustion of combustible substances to heat water to a certain working medium. Oil-fired boilers, gas-fired boilers, and coal-fired boilers with smoke boxes and flue waste heat recovery are also called waste heat boilers. Waste heat boilers can produce hot water or steam for use in other sections through waste heat recovery.

During the long-term use of the waste heat boiler, the exposed part of the boiler shell, especially the flue gas baffle door, is often corroded due to the action of sulfide in the flue gas and water vapor to produce liquid sulfuric acid. After the flue gas baffle door is corroded, its sealing performance cannot be guaranteed, resulting in the leakage of flue gas. At present, the commonly used countermeasures for this situation are, once the flue gas baffle door casing is found to have flue gas leakage due to casing corrosion, stop the machine immediately, replace the flue gas baffle door, or replace the flue gas baffle door. Gas damper door for welding repairs, etc. Due to the large weight and volume of the smoke baffle door, it is not easy to move, and there are great difficulties in the maintenance operation process.

Contents of the invention

In view of the above problems, the present invention provides a shell structure of a high-temperature smoke baffle door. The shell structure adopts a modular design, which is flexible and convenient for disassembly and assembly, and is convenient for subsequent maintenance.

According to the technical solution of the present invention: a high-temperature smoke baffle door shell structure is characterized by: comprising a base, a lower shell, and an upper shell, the lower shell is fixedly connected to the base through a bottom plate, and the upper shell The body is fixedly connected to the lower shell through the split connection flange, and the upper shell is connected to the upper head. A second sealed air inlet pipe is connected, and a bearing seat is arranged at the joint between the upper head and the upper casing.

As a further improvement of the present invention, the connection between the upper head and the upper casing is provided with connecting flange reinforcement ribs, and the upper end of the upper casing is provided with transverse reinforcement ribs, and the length of the upper head is shorter than that of the upper casing. length, the horizontal surface where the upper head is connected to the upper shell is provided with a flat sealing plate, and the surface of the upper head is vertically provided with a vertical sealing plate; the connection between the bearing seat and the upper shell and the upper There are ribs.

As a further improvement of the present invention, longitudinal reinforcing ribs are evenly distributed on the surfaces of the lower shell and the upper shell.

As a further improvement of the present invention, lifting lugs are provided at the connection between the upper shell surface and the upper head.

The technical effect of the present invention is that the product of the present invention adopts a split structure design, which is convenient for transportation and assembly operations, and at the same time facilitates the operations of filling fiberboards in the shell and covering the fiberboards with inner lining boards.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a left side view of Fig. 1 .

Detailed ways

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

In Fig. 1, it includes a base 1, a lower casing 2, an upper casing 3, a split connection flange 4, a connecting flange reinforcement rib 5, a bearing seat 6, an upper sealing head 7, a first sealing air inlet pipe 8, a second Two sealing air inlet pipes 9, vertical sealing plates 10, flat sealing plates 11, longitudinal ribs 12, etc.

As shown in Figure 1, the present invention is a high-temperature smoke baffle door shell structure, including a base 1, a lower shell 2, and an upper shell 3, and the lower shell 2 is fixedly connected to the base through a bottom plate 5 1. The upper casing 3 is fixedly connected to the lower casing 2 through the split connection flange 4, and the upper casing 3 is connected to the upper head 7 at the opening end, and the upper casing 3 is provided with a first The sealing air inlet pipe 8 is connected with the second sealing air inlet pipe 9 on the upper sealing head 7 , and the bearing seat 6 is arranged at the joint between the upper sealing head 7 and the upper casing 3 .

The connection between the upper head 7 and the upper casing 3 is provided with a connecting flange reinforcing rib 5, and a transverse reinforcing rib 6 is arranged at the upper end of the upper casing 3, and the length of the upper sealing head 7 is less than that of the upper casing 3. length, the horizontal surface where the upper head 7 is connected with the upper casing 3 is provided with a flat sealing plate 11, and the surface of the upper head 7 is vertically provided with a vertical sealing plate 10; the bearing seat 6 is connected with the upper casing 3 and the upper The joints of the head 7 are all provided with reinforcing ribs.

The surfaces of the lower shell 2 and the upper shell 3 are uniformly provided with longitudinal ribs 12 .

Lifting lugs 8 are provided at the connection between the surface of the upper shell 3 and the upper head 7 .

The working process of the present invention is as follows: by improving the structure of the shell, the three-way shell is divided into two sections, the upper shell 3 and the lower shell 2, which are assembled and used on the construction site. The joint surfaces of each section need to be welded on the construction site, and simultaneously Fill the upper and lower shells with aluminum silicate fiber boards and cover the inner liner along the airflow direction, and spot-weld the nuts on the inner liner at the same time. The disassembly and assembly of the product of the present invention are relatively convenient. When the upper casing 3 is connected with the lower casing 2, the lifting lug 8 on the upper casing 3 can be lifted by the hoisting equipment, and the upper casing 3 can be transferred to the lower casing. body 2, and then fall and align on the lower housing 2, and fasten the connection by bolts.

Claims (4)

1. a high-temperature flue gas baffle door shell structure, it is characterized in that: comprise base (1), lower house (2), upper shell (3), described lower house (2) is fixedly connected on described base (1) by base plate (5), upper shell (3) is fixedly connected with lower house (2) by split adpting flange (4), upper shell (3) openend is connected with upper cover (7), described upper shell (3) is provided with the first sealing air inlet tube (8) that is communicated with housing inner chamber, on upper cover (7), be connected with the second sealing air inlet tube (9), upper cover (7) is provided with bearing block (6) with the junction of upper shell (3).

2. according to high-temperature flue gas baffle door shell structure claimed in claim 1, it is characterized in that: described upper cover (7) is provided with adpting flange reinforcement (5) with the junction of upper shell (3), and in upper shell (3) upper end, transverse stiffener rib (6) is set, the length of described upper cover (7) is less than the length of upper shell (3), on the horizontal plane that described upper cover (7) is connected with upper shell (3), be provided with flat shrouding (11), upper cover (7) surface is vertically to being provided with vertical closure plate (10); Bearing block (6) is provided with reinforcement with the junction of upper shell (3) and upper cover (7).

3. according to high-temperature flue gas baffle door shell structure claimed in claim 1, it is characterized in that: described lower house (2) and the uniform longitudinal rein forcement (12) that is provided with in upper shell (3) surface.

4. according to high-temperature flue gas baffle door shell structure claimed in claim 1, it is characterized in that: on described upper shell (3) surface, establishing son with the junction of upper cover (7) has hanger (8).