Granite wet dust collection type energy-saving coal-fired boiler

Abstract

The invention discloses a granite wet dust collection type energy-saving coal-fired boiler. A high-temperature exhaust pipe of a boiler body is connected with an induced draft fan through a water-preheating shell-and-tube heat exchanger tube pass and a granite wet dust collector. A high-position soft water pond is preheated by a water-preheating shell-and-tube heat exchanger shell pass and then supplies water to the boiler through a high-pressure pump system. A coupling and a fan shaft of the induced draft fan are assembled in a threaded mode, a fan impeller and the fan shaft of the induced draft fan are also assembled in a threaded mode, and the thread turning direction is the direction for automatic locking along with work and loads. The fan impeller presses a copper-lead torsional composite gasket and then is connected with the fan shaft in a threaded rigid connection mode, and a hoop part enables the coupling and the other end of the fan shaft to be connected in a rigid connection mode. According to the granite wet dust collection type energy-saving coal-fired boiler, heat recovery and purification treatment of boiler exhaust are achieved, more importantly, the disassembling technology of the boiler induced draft fan is greatly improved, the problem that an existing boiler induced draft fan is assembled in a threaded mode, is automatically locked continuously under the action of loads and is not easy to disassemble can be effectively solved, and fans of large boilers can be conveniently disassembled after threaded locking.

Description

technical field [0001] The invention relates to an energy-saving coal-fired boiler with granite wet method and dust removal 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, often a coupling. 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 coupling at the other end, but the existing boiler fan shaft, fan impeller, and coupling assembly It is a typical shaft and...

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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