CN101774093A

CN101774093A - Method for reducing welding deformation of tubular cylindrical film-type water-cooled wall cylinder of gasification furnace

Info

Publication number: CN101774093A
Application number: CN200910197465A
Authority: CN
Inventors: 徐永兴; 华炳增; 邓建国; 孙厚彬
Original assignee: Shanghai Boiler Works Co Ltd
Current assignee: Shanghai Boiler Works Co Ltd
Priority date: 2009-10-21
Filing date: 2009-10-21
Publication date: 2010-07-14
Anticipated expiration: 2029-10-21
Also published as: CN101774093B

Abstract

The invention provides a method for reducing welding deformation of a tubular cylindrical film-type water-cooled wall cylinder of a gasification furnace. The method is characterized by comprising the following steps of: firstly, dividing a 360-degree cylinder into at least two plates; obtaining the number n of tubes needed by each plate through calculation, welding n tubes into film-type water-cooled wall flat rows on a film-type wall splicing and rowing welder to obtain at least two sets of film-type water-cooled wall flat rows; secondly, respectively putting the at least two sets of the film-type water-cooled wall flat rows to a heat treatment furnace integrally for stress removal treatment; thirdly, putting the at least two sets of the film-type water-cooled wall flat rows to a bending die respectively, and bending into at least two sets of circular arc plates in segments; and finally, hoisting the at least two sets of the bended and molded film-type water-cooled wall circular arc plates to an assembly tyre rack and splicing the circular arc plates into the 360-degree cylinder. The method has the advantages that: weld joints between most of the tubes and flat steel can be welded mechanically to improve the quality of the weld joints and the production efficiency of the welding; and the method can meet the requirements of the deviation of diameter and roundness of the cylindrical film-type water-cooled wall cylinder.

Description

Reduce the method for welding deformation of tubular cylindrical film-type water-cooled wall cylinder of gasification furnace

Technical field

The present invention relates to a kind of manufacture method that reduces welding deformation of tubular cylindrical film-type water-cooled wall cylinder of gasification furnace.

Background technology

Fin panel casing is the critical piece in the gasification furnace internals, its cylindrical film-type water-cooled wall cylinder is welded by the band steel of more than 180 pipes with same quantity, single-stage cylindrical film-type wall along the circumferential direction has surplus in the of 750 more than 10 meter long longitudinal angle weld seam, if these weld seams all adopt manual welding, very big welding contraction and distortion can be produced, product quality will be had a strong impact on.But technology so far all is to adopt manual welding, does not also have a kind of method of shrinking and being out of shape can finely avoided.

Summary of the invention

The purpose of this invention is to provide a kind of manufacture method that can avoid welding the tubular cylindrical film-type water-cooled wall cylinder of gasification furnace that shrinks and be out of shape.

In order to achieve the above object, technical scheme of the present invention has provided a kind of method that reduces welding deformation of tubular cylindrical film-type water-cooled wall cylinder of gasification furnace, it is characterized in that, step is:

Step 1,360 ° of cylinders are divided at least two slit bamboo or chopped woods, calculate the number of tubes n that every slit bamboo or chopped wood needs, on membrane wall is composed and laid out welding machine, n root pipe is welded into the fin panel casing flat raft, obtain at least two group fin panel casing flat rafts;

Step 2, with at least two group fin panel casing flat rafts respectively integral body send heat-treatment furnace to and carry out stress-removal and handle;

Step 3, at least two group fin panel casing flat rafts are put into bending die respectively, segmentation bends at least two group circular arc slit bamboo or chopped woods;

Step 4, at least two group fin panel casing circular arc slit bamboo or chopped woods of press forming are hung assembling be assembled into 360 ° of cylinders of dress body on the moulding bed.

In order to reduce welding deformation as far as possible, the present invention's employing is welded into pipe and band steel the flat raft of certain width earlier by machine, again with flat raft after stress-removal heat treatment, dispose the bending die up and down of certain bending radius, after hydraulic press is pressed into circular arc, the circular arc pipe is come on the special assembling moulding bed be assembled into cylindrical tube again, such weld seam more than 95% can adopt mechanical welding, significantly reduced welding deformation, the quality that obtains for product creates conditions.

Advantage of the present invention is: greatly the pipe of part and the weld seam between the band steel can adopt the machinery welding, have improved the production efficiency of weldquality and welding; Can guarantee the requirement of cylindrical film-type water-cooled wall cylinder diameter and roundness deviation.

Description of drawings

Fig. 1 is the structural representation of bending die used in the present invention;

Fig. 2 is the structural representation of assembling moulding bed used in the present invention;

Fig. 3 is that the A-A of circular orientation plate portion among Fig. 2 is to schematic diagram;

Fig. 4 is the I part enlarged drawing among Fig. 3.

The specific embodiment

Specify the present invention below in conjunction with embodiment.

Embodiment

The invention provides a kind of method that reduces welding deformation of tubular cylindrical film-type water-cooled wall cylinder of gasification furnace, its concrete steps are:

Step 1,360 ° of cylinders are divided at least two slit bamboo or chopped woods, calculate the number of tubes n that every slit bamboo or chopped wood needs, on membrane wall is composed and laid out welding machine, n root pipe is welded into the fin panel casing flat raft, obtain at least two group fin panel casing flat rafts; In the present embodiment 360 ° of cylinders are divided into six slit bamboo or chopped woods, every slit bamboo or chopped wood has 30～32 pipes, is welded into six groups of fin panel casing flat rafts, and every group of width is that 1453～1550mm, length are 13000mm.

Step 2, with six groups of fin panel casing flat rafts respectively integral body send heat-treatment furnace to and carry out stress-removal and handle, specification of heat treatment is: 680～720 ℃ of heating-up temperatures are incubated 1 hour; Membrane wall flat raft before bending is through eliminating stress processing, its side sway degree≤3mm.

Step 3, six groups of fin panel casing flat rafts are put into bending die (bending die is installed on the press in advance) respectively.Bending die comprises patrix 1 and counterdie 3 as shown in Figure 1, is respectively equipped with first arc plate 2 and second arc plate 4 in the bottom of patrix 1 and the top of counterdie 3, is provided with alignment pin 5 respectively at the place, both sides of the edge of second arc plate 4.Described patrix 1 and counterdie 3 length are respectively at least 3 meters, and in the press limit of power, bending die is longer as far as possible, can reduce the workpiece number of times that moves and bend, and are better to product quality, are 5 meters in the present embodiment.The fin panel casing flat raft is placed on second arc plate 4 of counterdie 3, use segmentation press-bending on the hydraulic press subsequently, press pre-sets 1000 tons of pressure during press-bending, the bus that will guarantee water screen tube subcenter line and mould simultaneously parallels, and then patrix slowly presses down the fin panel casing flat raft is pressed into the circular arc slit bamboo or chopped wood;

Step 4, at least two group fin panel casing circular arc slit bamboo or chopped woods of press forming are hung assembling be assembled into 360 ° of cylinders of dress body on the moulding bed.As Fig. 2 to Figure 4 shows that the assembling moulding bed schematic diagram, at least two circular orientation plates 6 that comprise vertical arrangement, be provided with pipe registration plate 9 in the outside of circular orientation plate 6, the connection square tube 7 by level between the circular orientation plate 6 connects, and is provided with location-plate and strengthens channel-section steel 8 between circular orientation plate 6.In conjunction with above-mentioned parts, step 4 can specifically be divided into:

Step 4.1, the fin panel casing circular arc slit bamboo or chopped wood of press forming is hung on the described circular orientation plate 6, make the pipe of circular arc slit bamboo or chopped wood, and fin panel casing circular arc slit bamboo or chopped wood is close on the described circular orientation plate 6 with chain block near described pipe registration plate 9;

Step 4.2, with provisional steel plate fin panel casing circular arc slit bamboo or chopped wood point is welded on the described circular orientation plate 6, the dress band steel of burn-oning is made 360 ° of cylinders respectively between every group of fin panel casing circular arc slit bamboo or chopped wood.

Claims

1. a method that reduces welding deformation of tubular cylindrical film-type water-cooled wall cylinder of gasification furnace is characterized in that, step is:

Step is divided at least two slit bamboo or chopped woods to 360 ° of cylinders, calculates the number of tubes n that every slit bamboo or chopped wood needs, and on membrane wall is composed and laid out welding machine n root pipe is welded into the fin panel casing flat raft, obtains at least two group fin panel casing flat rafts;

2. a kind of method that reduces welding deformation of tubular cylindrical film-type water-cooled wall cylinder of gasification furnace as claimed in claim 1 is characterized in that, the heating-up temperature that stress-removal described in the step 2 is handled is 680～720 ℃, is incubated 1 hour.

3. a kind of method that reduces welding deformation of tubular cylindrical film-type water-cooled wall cylinder of gasification furnace as claimed in claim 1, it is characterized in that, bending die described in the step 3 comprises patrix (1) and counterdie (3), be respectively equipped with first arc plate (2) and second arc plate (4) in the bottom of patrix (1) and the top of counterdie (3), be provided with alignment pin (5) respectively at the place, both sides of the edge of second arc plate (4).

4. a kind of method that reduces welding deformation of tubular cylindrical film-type water-cooled wall cylinder of gasification furnace as claimed in claim 3 is characterized in that, described patrix (1) and counterdie (3) length are respectively at least 3 meters.

5. a kind of method that reduces welding deformation of tubular cylindrical film-type water-cooled wall cylinder of gasification furnace as claimed in claim 1 is characterized in that, what bend use described in the step 3 is hydraulic press, and hydraulic press pre-sets 1000 tons of pressure during press-bending.

6. a kind of method that reduces welding deformation of tubular cylindrical film-type water-cooled wall cylinder of gasification furnace as claimed in claim 1, it is characterized in that, in carrying out the described press-bending process of step 3, guarantee that the center line of described fin panel casing flat raft and the bus of described bending die parallel.

7. a kind of method that reduces welding deformation of tubular cylindrical film-type water-cooled wall cylinder of gasification furnace as claimed in claim 1, it is characterized in that, described assembling moulding bed comprises at least two circular orientation plates (6) of vertical arrangement, be provided with pipe registration plate (9) in the outside of circular orientation plate (6), connection square tube (7) by level between the circular orientation plate (6) connects, and is provided with location-plate and strengthens channel-section steel (8) between circular orientation plate (6).

8. a kind of method that reduces welding deformation of tubular cylindrical film-type water-cooled wall cylinder of gasification furnace as claimed in claim 7 is characterized in that described step 4 is:

Step 4.1, the fin panel casing circular arc slit bamboo or chopped wood of press forming is hung on the described circular orientation plate (6), make the pipe of circular arc slit bamboo or chopped wood near described pipe registration plate (9), and fin panel casing circular arc slit bamboo or chopped wood is close on the described circular orientation plate (6) with chain block;

Step 4.2, with provisional steel plate fin panel casing circular arc slit bamboo or chopped wood point is welded on the described circular orientation plate (6), the dress band steel of burn-oning is made 360 ° of cylinders respectively between every group of fin panel casing circular arc slit bamboo or chopped wood.