CFB boiler membrane-wall grid anti-wear alloy plate

Abstract

The invention relates to a CFB boiler membrane-wall grid anti-wear alloy plate and effectively solves the problems of the prior art. According to the technical scheme, the anti-wear alloy plate comprises an alloy plate body, a first concave arc transition is arranged between one side and bottom of the alloy plate body, a second concave arc transition is arranged between the other side and bottom of the alloy plate body, the sum of angles of the first arc transition and second arc transition is no less than 180 degrees, and one or multiple inner grooves corresponding to the membrane-wall pipe in diameters are formed in the bottom of the alloy plate body between the first arc transition and second arc transition. The alloy plate is tighter in protection, material is saved, construction is facilitated, efficiency is improved, welding is firmer, and controllability is high.

Description

technical field [0001] The invention relates to a CFB boiler wear-resistant plate, in particular to a CFB boiler membrane wall meshed wear-resistant alloy plate. Background technique [0002] CFB boiler is an advanced relatively clean and efficient coal-fired boiler. Its use provides a lot of electric energy and heat energy for our production and life. my country is currently the country that uses the most CFB boilers in the world. The vertical membrane wall (tube row) composed of four vertical walls (tubes) of the CFB boiler is an important heating surface of the boiler. The height is tens of meters, and the perimeter of the horizontal rectangular section is several. Ten meters is an important part to ensure the efficient operation of the boiler. Due to the working characteristics of the CFB boiler, a large number of high-temperature and high-speed movement of the wall-adhering material particles that are close to the surface of the membrane-type wall tube row are generated ...

AI Technical Summary

Problems solved by technology

my country is currently the country that uses the most CFB boilers in the world. The vertical membrane wall (tube row) composed of four vertical walls (tubes) of the CFB boiler is an important heating surface of the boiler. The height is tens of meters, and the perimeter of the horizontal rectangular section is several. Ten meters is an important part to ensure the efficient operation of the boiler. Due to the working characteristics of the CFB boiler, a large number of high-temperature and high-speed movement of the wall-adhering material particles that are close to the surface of the membrane-type wall tube row are generated in the furnace during operation. The erosion of these particles causes The heating surface of the membrane wall of CFB boilers is severely worn, and many boilers have membrane wall tube wear and leakage after a short period of operation. According to statistics, abnormal shutdowns caused by membrane wall abrasion and leakage account for more than 50% of the total number of accidental shutdowns of CFB boilers , seriously affecting the efficiency of CFB boilers, and none of the existing technologies can fundamentally solve the problem of severe membrane wall wear

[0003] Existing anti-wear products such as figure 1 As shown, it includes a wear-resistant sheet 1, and there are multiple inner grooves 2 on one long side of the wear-resistant sheet 1. It mainly has the following disadvantages: 1. The overlapping of two adjacent wear-resistant plates is at the two ends of the plates. The longest side overlaps, wasting the material of the overlapping side; 2. Due to the long overlapping side, it is easy to form gaps and affect the use effect; 3. The distance between the welding legs at both ends is long and easy to cause cracking due to self-heating; 4. Anti-wear The two top feet of the circular arc of the groove in the plate are easy to resist the welding seam of the membrane wall tube and the fin, making the welding not tight

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