Discharge condensation tube for low and low temperature electrostatic precipitator

Abstract

The invention discloses a discharge condensation tube for a low-low-temperature electrostatic precipitator, and belongs to the technical field of the condensation tubes. The discharge condensation tube is characterized by comprising an insulating inner tube (1) and a metal discharge outer tube (2), wherein the insulating inner tube (1) is embedded inside the metal discharge outer tube (2); the insulating inner tube (1) is a hollow tube body, and condensed water is circulated in the tube body; and the outer wall of the metal discharge outer tube (2) is connected with a power supply. A heat exchange device and a discharge electrode are creatively integrated into a whole so that the condensation tube can achieve the functions of condensation heat exchange and discharge at the same time. According to the discharge condensation tube, the structure is more compact, potential barrier is reduced by utilizing condensed water generated on the outer wall of the condensation tube, and the discharge capacity of the discharge electrode is enhanced, and the charge amount of the particulate matter is increased; and meanwhile, due to the condensation effect of the condensation tube, convection canbe generated around the discharge electrode so that the collision probability of the particulate matter and ions and electrons can be increased; and due to the charge amount of the particulate matter,the particulate matter on the outer wall of the condensation tube are reduced so that effects that equipment is eroded and the heat exchange effect is influenced can be avoided.

Description

technical field [0001] The invention discloses a discharge condensation tube for a low-low temperature electric dust collector, which belongs to the technical field of condensation tubes. Background technique [0002] The electrostatic precipitator is a widely used high-efficiency dust collector. Its working principle is: the metal discharge electrode ionizes the surrounding air under the action of high DC voltage to generate a large number of ions. Particles collide and combine to make the particles charged. The charged particles then enter the dust collection section of the electrostatic precipitator. Realize the purification of flue gas. Electrostatic precipitator has the advantages of high dust removal efficiency, small resistance loss, low energy consumption, large flue gas treatment capacity, and high allowable operating temperature, so it has become an essential supporting equipment for thermal power plants. [0003] Low and low temperature electrostatic precipitato...

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Problems solved by technology

[0004] However, there are certain defects in the internal structure of the current low and low temperature electrostatic precipitator. First, the heat exchange device and the discharge electrode in the prior art are separately arranged, and each of the heat exchange device and the discharge electrode must occupy a certain space. It makes the volume of the equipment larger; 2. Since the discharge electrode and the heat exchange device of the ordinary low-temperature dust collector are separated, there will be no obvious condensation at the discharge electrode, and the efficiency of electrostatic dust removal is not high; 3. Due to the discharge electrode The concentration of ions and electrons in the vicinity is higher than that in other areas, resulting in a lower concentration of ions and electrons near the heat exchange device, and the collision and combination between particles are relatively weak. Moreover, convection will still be formed inside the heat exchange device. This convection It will still drive the particles to move towards the heat exchange boundary until they move to the outer wall of the heat exchange tube. The particles on the outer wall of the heat exchange tube will cause corrosion of the heat exchange tube wall, damage the equipment, reduce the heat transfer coefficient of the heat exchange tube, and affect the heat transfer rate of the heat exchange tube. heat effect

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