Tail heat utilization and dust removal integrated coal fired boiler

Abstract

The invention discloses a tail heat utilization and dust removal integrated coal fired boiler. According to the tail heat utilization and dust removal integrated coal fired boiler, a tail gas pipe of the boiler is tangentially connected with a cyclone dust remover, and dust is discharged at the cone base through a closed-air aspirator after rotational flow dust removal; tail gas is connected with a cone through a rotational flow ascending pipe and penetrates row pipes after being uniformly dispersed, and the tail gas is centralized by a cone hopper on the upper portion and exhausted out by an induced draft fan through an exhaust pipe; an impeller of the induced draft fan is of a structure with blades in a hollow wedge shape and a backboard is in a dish shape; and the shape contour line of the induced draft fan is an involute. According to the tail heat utilization and dust removal integrated coal fired boiler, tail heat utilization and the dust removal of the boiler are creatively integrated, and a cyclone dust removal tail heat efficient using device is designed; the tail heat utilization and the dust removal are completed in one step, the equipment input is reduced, and the working efficiency is also improved; by means of the structure with the blades in the hollow wedge shape and the backboard in the dish shape, the real-time cleaning of the dust on the impeller of the induced draft fan and the increase of the strength of the impeller of the draught fan are achieved, the stability is improved, and safety accidents caused by dust accumulation are effectively eradicated; and the application prospect is wide.

Description

technical field [0001] The invention relates to a coal-fired boiler, and specifically refers to an integrated coal-fired boiler with tail heat utilization and dust removal in which the fan does not accumulate dust. Background technique [0002] Boilers are very commonly used thermal power equipment. Coal-fired boilers are still one of the main preferred equipment for heating due to mature technology and low fuel costs. However, coal-fired boilers need to Perform tail heat utilization, dust removal, harmful gas purification and other operations on the tail gas. [0003] The induced draft fan is the key equipment for coal-fired boilers to realize tail heat utilization and dust removal. Most of the induced draft fans for boilers are centrifugal fans. The continuous, stable and reliable operation of the induced draft fans is very important. Because most of the occasions where coal-fired boilers are used contain certain dust , When the induced draft fan is working, when the air ...

AI Technical Summary

Problems solved by technology

Once part of the hardened dust is shaken off, it will immediately leave the dynamic rotation balance of the induced draft fan, and then generate strong vibration, which may cause serious personnel and equipment safety accidents

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