Energy-conservation, desulphurization and dust removal integrated electric-bag dust remover

Abstract

The invention belongs to the technical field of pollutant purification and particularly relates to an energy-conservation, desulphurization and dust removal integrated electric-bag dust remover. The electric-bag dust remover is characterized in that an integrated electric dust remover is modified into the electric-bag integrated dust remover with an energy-conservation, desulphurization and dust removal technology and comprises an electric dust remover body, a low-temperature economizer, a bag dust remover body, an air heater and an induced draft fan, the electric dust remover body, the low-temperature economizer, the bag dust remover body and the induced draft fan are sequentially connected, the low-temperature economizer is connected with the air heater, the air heater is connected with the position of the entry of an air preheater, and the induced draft fan is connected with a desulfurizing tower. By the arrangement, flue gas temperature is reduced, the electric-bag dust remover is downsized, filtration wind speed is reduced, and dust removal efficiency of the bag dust remover body is favorably improved; through longitudinal isolation, 3-4 channels are longitudinally isolated respectively from the entry to the exit, leakage can be isolated if available, and preparation is ready for online isolation for online overhaul; the energy-conservation, desulphurization and dust removal integrated electric-bag dust remover is mainly applied to thermal flue gas treatment.

Description

technical field [0001] The invention belongs to the technical field of pollutant purification, and more specifically, relates to an electric bag dust collector integrating energy-saving desulfurization and dust removal. The device is a technology that integrates energy saving, desulfurization and dust removal. Background technique [0002] As of 2016, my country's thermal power installed capacity is 1 billion kilowatts (1053.88 million kilowatts). In December 2015, the State Council fully implemented ultra-low emission and energy-saving renovations in thermal power plants. There is already a clear time schedule, especially for the two transformations of large units, which will face a huge investment in transformation funds, so it is of great significance to find a transformation that is in line with the actual conditions of the unit and exerts the combination optimization. [0003] At present, there are some electrostatic precipitator units in the power plant. Due to their...

AI Technical Summary

Problems solved by technology

Patent ZL2016208433208, a system based on the coupling of a fluoroplastic heat exchanger heater and a low-temperature economizer, the invention is aimed at the deviation of the boiler exhaust gas temperature by 20~50°C from the design, and the specific resistance of the fly ash and the amount of flue gas increase, thereby To reduce the dust removal efficiency of the electrostatic precipitator, the designed low-temperature electrostatic precipitator technology, the main function of the economizer is to recover a large amount of waste heat from the flue gas, and the auxiliary function is to reduce the flue gas temperature of the electrostatic precipitator. The fluoroplastic heat exchanger is installed on the After the electrostatic precipitator and before the desulfurization tower, it only plays the role of heat exchange, but it cannot solve the corrosion of the low-temperature section of the air preheater. The corrosion requirements for metal materials are high, which increases the cost of heat exchange gas

Moreover, electrostatic dust removal and low-temperature dust removal equipment are used in the process, which are installed in different parts of the flue. It is a multi-stage exhaust gas treatment process with a long process. Electrostatic dust removal relies on electrostatic force to absorb dust around the electrodes. The scope of requirements is narrow, among which heavy metals, SO 3 etc. are removed by short-term collision contact in the gas-solid mixing space, the efficiency is low, and the corrosion is very serious in actual operation;

Images