CN205188336U

CN205188336U - Converter exhaust heat boiler fire door section flue

Info

Publication number: CN205188336U
Application number: CN201521001078.1U
Authority: CN
Inventors: 邓伟; 赵勇龙
Original assignee: Wuxi Xianglong Environment Protection Technology Co Ltd
Current assignee: Wuxi Xianglong Environment Protection Technology Co Ltd
Priority date: 2015-12-07
Filing date: 2015-12-07
Publication date: 2016-04-27
Anticipated expiration: 2025-12-07

Abstract

The utility model relates to a converter exhaust heat boiler fire door section flue, its characterized in that: this flue is trumpet - shaped, and the equipartition has a plurality of heat pipes that receive in the flue, and wherein every receives the heat pipe formed by heat pipe (3) and small -bore receive heat pipe (5) by the heavy -calibre, and the heavy -calibre receives the one end of heat pipe (3) and collection case (1) welding of flue lower part, and the heavy -calibre is connected with small -bore receive heat pipe (5) through eccentric reducing union (4) by the other end of heat pipe (3), and two adjacent heavy -calibres receive to weld between heat pipe (3) has baffle (2). This kind of converter exhaust heat boiler fire door section flue will single two parts that receive the heat pipe to divide into the bore variation in size receives the heat pipe, upper portion receive the pipe diameter of heat pipe the same with in the past, and horn mouth department receives the pipe diameter of heat pipe great, makes horn mouth department diminished by the interval between the heat pipe like this, the corresponding maximum breadth that can reduce the baffle for the baffle can obtain adequate cooling, thereby prevents the baffle scaling loss and receive the heat pipe drawing breakage.

Description

A kind of Converter Residual Heat Boiler fire door section flue

Technical field

The utility model relates to a kind of flue, is a kind of fire door section flue of steel-smelting revolving furnace smoke canal formula waste heat boiler, belongs to steelmaking equipment technical field.

Background technology

In order to improve boiler efficiency, shell boiler develops into tubular boiler gradually, to increase heat transfer area.Pot water by drum through downtake flow into below casing in, distribute to each tube bank by casing, these tube bank in water constantly absorb heat energy, be pooled in casing above and flow back in drum again, we call header or header upper and lower casing.

Purifying smoke of steel converter retrieving arrangement arranges the object of waste heat boiler, is to reduce flue-gas temperature, and for creating conditions to flue gas ash removal further, energy recovered flue gas sensible heat, produces steam simultaneously.At present, many mini-medium BOF plants adopt the treatment process of flue gas and partly fire method, and the mid-term coefficient of excess air of namely blowing controls between 0.15 ~ 0.3, and this method can be removed from and fallen cover, fills the complex operations such as nitrogen and precise hard_drawn tuhes.Therefore many mini-medium BOF plants waste heat boilers eliminate movable gas hood, are lengthened the bottom of fire door section flue, and make hydraucone form, to facilitate seizure flue gas.

The structure of flue is generally membrane wall structure by Tube-sheet Welding, because the upper and lower opening diameter difference of the flue of hydraucone form is larger, cause the non-constant width of dividing plate (needing > 40mm) be placed between heat pipe, as Fig. 3 and Fig. 4, and fire door section flue is in combustion zone above converter, so often there is the situation of scaling loss dividing plate and drawing crack heat pipe.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned deficiency, provides and can effectively reduce spacer width, prevents a kind of Converter Residual Heat Boiler fire door section flue of dividing plate scaling loss and heat pipe drawing crack.

The purpose of this utility model is achieved in that

A kind of Converter Residual Heat Boiler fire door section flue, this flue is toroidal, some heat pipes are evenly equipped with in flue, wherein each heat pipe is made up of heavy caliber heat pipe and small-bore heat pipe, one end of heavy caliber heat pipe and the header welding of flue bottom, the other end of heavy caliber heat pipe is connected with small-bore heat pipe by eccentric reducing joint, is welded with dividing plate between adjacent two heavy caliber heat pipes.

Small-bore heat pipe and heavy caliber heat pipe keep concordant inside flue.

The specification of eccentric reducing joint is DN50 × 32 II R(E).

Dividing plate is wedge shape.

Dividing plate is its widest part position near one end of header.

A kind of Converter Residual Heat Boiler fire door of the utility model section flue has the following advantages:

This kind of Converter Residual Heat Boiler fire door section flue is by the rational modification of structure, single heat pipe is divided into two portions heat pipe that caliber size is different, and by eccentric reducer union, two portions heat pipe is connected, the caliber of the heat pipe on top is as in the past, and the caliber of hydraucone place heat pipe is larger, so just, make the pitch smaller between hydraucone place heat pipe, the maximum width of dividing plate can correspondingly be reduced, dividing plate fully can be cooled, thus prevent dividing plate scaling loss and heat pipe drawing crack.

Accompanying drawing explanation

Fig. 1 is the sectional view of a kind of Converter Residual Heat Boiler fire door of the utility model section flue.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is the sectional view of original Converter Residual Heat Boiler fire door section flue.

Fig. 4 is the B-B sectional view of Fig. 3.

In figure: header 1, dividing plate 2, heavy caliber heat pipe 3, eccentric reducing joint 4, small-bore heat pipe 5, maximum width H.

Embodiment

See Fig. 1 and Fig. 2, the utility model relates to a kind of Converter Residual Heat Boiler fire door section flue, this flue is toroidal, some heat pipes are evenly equipped with in flue, wherein each heat pipe is made up of heavy caliber heat pipe 3 and small-bore heat pipe 5, one end of heavy caliber heat pipe 3 is welded with the header 1 of flue bottom, the other end of heavy caliber heat pipe 3 is DN50 × 32 II R(E by specification) eccentric reducing joint 4 is connected with small-bore heat pipe 5, small-bore heat pipe 5 and heavy caliber heat pipe 3 keep concordant inside flue, dividing plate 2 is welded with between adjacent two heavy caliber heat pipes 3, this dividing plate 2 is in wedge shape, dividing plate 2 is its widest part position near one end of header 1, this maximum width is H.

Claims

1. a Converter Residual Heat Boiler fire door section flue, it is characterized in that: this flue is toroidal, some heat pipes are evenly equipped with in flue, wherein each heat pipe is made up of heavy caliber heat pipe (3) and small-bore heat pipe (5), one end of heavy caliber heat pipe (3) is welded with the header (1) of flue bottom, the other end of heavy caliber heat pipe (3) is connected with small-bore heat pipe (5) by eccentric reducing joint (4), is welded with dividing plate (2) between adjacent two heavy caliber heat pipes (3).

2. a kind of Converter Residual Heat Boiler fire door section flue according to claim 1, is characterized in that: small-bore heat pipe (5) keeps concordant with heavy caliber heat pipe (3) inside flue.

3. a kind of Converter Residual Heat Boiler fire door section flue according to claim 1, is characterized in that: the specification of eccentric reducing joint (4) is DN50 × 32 II R(E).

4. a kind of Converter Residual Heat Boiler fire door section flue according to claim 1, is characterized in that: dividing plate (2) is in wedge shape.

5. a kind of Converter Residual Heat Boiler fire door section flue according to claim 1 or 4, is characterized in that: dividing plate (2) is its widest part position near one end of header (1).