Coil series cyclone wet dust removal coal-fired boiler

Abstract

The invention discloses a cyclone wet dust collection type coal-fired boiler with coil pipes connected in series. A high-temperature tail gas pipe of a boiler body is connected to an air induction fan through a water preheating coil pipe heat exchanger and a cyclone wet dust collector; a high-position soft water pool supplies water to the boiler after being preheated by a heat exchange coil pipe in a sewage pool and the water preheating coil pipe heat exchanger; threaded assembly 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, and the thread rotation direction is the automatic locking direction along with working and bearing; 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 a coal-fired boiler with a coil tube series cyclone wet method dedusting and 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

Images