Cyclone wet dust removal type energy-saving coal-fired boiler

Abstract

The invention discloses a cyclone wet dust collection type energy-saving coal-fired boiler. A high-temperature tail gas tube of a boiler body is connected to an air induction fan through the tube side of a water preheating tubular heat exchanger and a cyclone dust collector; water in a sewage pool below the cyclone dust collector is connected to a spraying plate in the cyclone dust collector through a spraying pump; a high-position soft water pool supplies water to the boiler after being preheated by the shell side of the water preheating tubular heat exchanger; threaded assembly with the automatic locking effect is adopted between a belt pulley and a fan shaft of the air induction fan and between a fan impeller and the fan shaft of the air induction fan; the fan impeller is in threaded and rigid connection with the fan shaft after pressing a copper-plastic reversed composite pad; the belt pulley and the other end of the fan shaft are connected rigidly through a clamp part. According to the boiler, heat recovery and purification treatment of tail gas of the boiler are realized, the disassembly and assembly technology of the air induction fan of the boiler is greatly modified, the problems that the air induction fan of the boiler is continuously and automatically locked and is difficult to disassemble under the loading effect due to threaded assembly can be effectively solved, and large boiler fans can be disassembled conveniently and quickly after being locked in a threaded mode.

Description

technical field [0001] The invention relates to an energy-saving coal-fired boiler with cyclone wet method dedusting which is convenient for dismantling and maintenance of an induced draft fan. Background technique [0002] Boilers are widely used thermal power equipment. The long-term operation of the fan is inseparable from the air supply and dust removal of the boiler. Therefore, the fan is the key equipment of the boiler. The larger the tonnage of the boiler, the larger the fan used. The structure of ordinary fans is generally that one end of the fan shaft is the fan impeller, and the other end is the power input end of the motor, usually a pulley. Since the fans in the boiler generally run continuously for a long time, the bearings are easily damaged. To replace the bearings, it is generally necessary to disassemble the fan impeller and the pulley at the other end first. However, the assembly of the existing boiler fan shaft, fan impeller and pulley is a typical shaft. ...

AI Technical Summary

Problems solved by technology

In the actual assembly of shafts and holes with transmission threads, in order to achieve large load-bearing functions, the size of the threaded shafts and matching nut-like components are relatively large, and it is often easy and convenient to screw in during assembly, and It can realize the automatic and continuous locking of the bearing capacity during use, so it is very reliable, but when it is disassembled, the assembly is often very tight, and disassembly is very difficult. It is particularly important to realize simple and easy disassembly under this condition

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