Commissioning method of bypass-free wet desulphurization system of coal-fired unit by means of tiny-oil ignition

Abstract

The invention discloses a commissioning method of a bypass-free wet desulphurization system of a large coal-fired unit by means of tiny-oil ignition. A unified formed commissioning method of a hot commissioning specific to bypass-free desulphurization systems does not exist at present. The commissioning method comprises two stages of a cold commissioning and the hot commissioning, the commissioning of a desulphurization process water system and a desulphurization waste water treatment system is required to be completed before the hot commissioning is started, the desulphurization waste water treatment system is used for receiving and processing waste water produced by a desulphurization system, commissioning steps and methods of the rest branch systems are identical to those of corresponding branch systems of a wet desulphurization system with a bypass, and start operation steps in the stage of the hot commissioning are properly adjusted. According to the commissioning method of the bypass-free wet desulphurization system of the coal-fired unit by means of tiny-oil ignition, the cold and hot commissioning processes are adjusted so that the problems existing in a bypass-free system during the hot commissioning are avoided, and the construction period is further reasonably arranged so that the synchronous safe starting of the desulphurization system and a main generator unit is guaranteed.

Description

technical field [0001] The invention belongs to the field of desulfurization flue gas purification, and specifically relates to a debugging method for a large-scale coal-fired unit without a bypass wet desulfurization system using a micro-oil ignition method, especially a method for debugging and starting a wet desulfurization system without a bypass in a thermal state . Background technique [0002] Driven by the national environmental protection policy, the flue gas wet desulfurization system has been widely used in thermal power units in my country. In the traditional desulfurization technology with bypass, when the unit is in the state of start-stop and accident maintenance, the flue gas can be discharged into the chimney through the bypass flue, which can avoid the dust and unburned oil particles of the main generator set at the start-up stage Entering the desulfurization system, it can run without stopping when the desulfurization system is overhauled. The main probl...

AI Technical Summary

Problems solved by technology

The defect of this debugging method is that: the electrostatic precipitator electric field is put into operation too early, resulting in dew condensation and low-temperature corrosion on the plate, which reduces the flashover voltage; Particles pollute the electrode plate of the electrostatic precipitator, which not only affects the dust removal efficiency, but also causes the ash hopper to bridge, unburned coal powder and oil stains in the precipitator for secondary combustion, resulting in deformation of the electrode plate, which seriously affects the safe operation of the precipitator; continuous slurry Replacement, that is, a large waste of water resources, also increases the treatment pressure of the desulfurization wastewater system, and will cause secondary pollution when it is too late to treat

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