Anti-abrasion and attrition-reducible circulating fluidized bed boiler

Abstract

The invention provides an anti-abrasion and attrition-reducible circulating fluidized bed boiler. The circulating fluidized bed boiler comprises a plurality of water wall tubes for forming a furnace water wall, wherein a plurality of horizontal flow blocking beams perpendicular to the water wall tubes in the length direction are arranged on the water wall; the positions of the horizontal flow blocking beams on the water wall meets an exponential formula that a<n+1>-(L+1)*a+L is equal to U; the value of the a can be obtained by using a mathematical Newton secant method; the root of a being equal to 1 is omitted to obtain a first horizontal flow blocking beam; the distance between the first horizontal flow blocking beam and an anti-abrasion plastic upper edge of a dense-phase zone is a; the distance between a second horizontal flow blocking beam and the first horizontal flow blocking beam is a<2>; and so on, the distance between a nth horizontal flow blocking beam and a (n-1)th horizontal flow blocking beam is a<n>. According to the invention, the horizontal flow blocking beams are arranged in the boiler, do not obviously affect rated operating parameter of the boiler, can effectively reduce abrasion of grains on the water wall tubes, and can reduce abrasion effect of swirl, turbulence, swirl flow, angle gather and the like, and can realize an excellent protective effect on the whole inner wall of the boiler.

Description

technical field [0001] The invention relates to a circulating fluidized bed boiler for antiwear and wear reduction, and belongs to the technical field of antiwear and antiwear for circulating fluidized bed boilers. Background technique [0002] Using the two-phase flow of solid phase and gas phase, the solid material burned in the furnace will continue to boil and expand under the action of wind, some of the particles will be collected by the gas-solid separation device at the furnace outlet, and sent back to the furnace through the return device Repeated cycle combustion, the boiler of this combustion cycle process is called circulating fluidized bed boiler. Compared with traditional boilers, circulating fluidized bed boilers have the advantages of wide fuel adaptability, sufficient combustion, large load adjustment range, fast adjustment speed, high comprehensive utilization rate of ash and slag, and low emissions of sulfur dioxide and nitrogen oxides. Therefore, Has a go...

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Problems solved by technology

[0008] For this reason, the technical problem to be solved by the present invention is that the layout method of the anti-wear and anti-friction devices of circulating fluidized bed boilers in the prior art is not clear, which is not conducive to realizing the anti-wear and anti-wear performance of the boiler while not affecting the heating performance of the boiler. To achieve the best anti-wear effect, in addition, it cannot solve the problem of wear at the protrusions such as welding seams, and cannot provide good protection for all parts of the inner wall of the boiler, thereby providing an easy-to-operate, well-considered welding seam, etc. Abrasion-resistant and wear-reducing circulating fluidized bed boilers that can achieve good protection against the wear at the protrusions and the entire inner wall of the boiler

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