34results about How to "Reduce the cost of mercury removal" patented technology

The invention discloses a flue gas mercury removal device, comprising a reactor casing, the lower part of which is provided with a gas inlet and the upper part of which is provided with a gas outlet. The flue gas mercury removal device is characterized in that, porous support plates at three layers are arranged between the gas inlet and the gas outlet of an inner cavity of the reactor casing, andeach support plate is provided with an adsorptive filler layer. Compared with the prior art, the flue gas mercury removal device has the advantages of high mercury removal efficiency and convenient implementation cost; in addition, the porous support plates at three layers are arranged, so a temporary maintenance platform during maintenance is not required and operational maintenance staff can stand on a flue gas rectifier plate to maintain and replace internal parts, thus the device also has the advantage of convenient maintenance.

The invention provides a visible light-based flue gas mercury removal method and a circular spraying-type mercury removal device employing the same. A reaction liquid containing a compound catalyst Ag / AgBr<1-x>I<x>-BiOBr<1-x>I<x> (x=0.6-1) is irradiated by a visible light and then releases hydroxyl radical.OH, superoxide anion radical.O2<-> and holes h<+>; the hydroxyl radical .OH, the superoxide anion radical .O2<-> and the holes h<+> have high oxidizing property; Hg<0> in the flue gas can be oxidized into Hg<2+>, so that the Hg<0> is removed in a form of the Hg<2+>, and the target of flue gas mercury removal is achieved. The mercury removal device is a circular spraying-type mercury removal device; the mercury flue gas enters from the lower part of a reactor and flows from bottom to top; a visible light source is arranged in a central quartz glass tube at the middle part of the reactor; circular spraying pipes are circularly arranged employing the central quartz glass tube as the center; the reaction liquid is sprayed towards the central quartz glass tube from the circular spraying pipes, namely the reaction liquid is sprayed from the outside to the inside; and the flue gas from which mercury is removed is discharged from a gas outlet in the top end of the reactor.

The invention belongs to the technical field of coal-fired flue gas purification, and in particular relates to a coal-fired flue gas powder adsorbent injection mercury removal device, which includes an adsorbent feeding part, an adsorbent powder conveying part and an adsorbent distribution injection part, wherein, The adsorbent feeding part includes a storage tank and a screw feeder; the adsorbent powder conveying part includes a frequency conversion feeder, a fan and an injector, and the ejector material is connected to the material conveying pipeline; The powder distributor is connected to several injection pipelines, and the injection pipeline is equipped with a spray gun and an intelligent flow control system. The invention can automatically and quickly adjust the dosing ratio of the powder adsorbent according to the mercury content in the flue gas, avoiding excessive or insufficient addition of the powder adsorbent, improving the effect of spraying mercury removal, reducing the waste of the powder adsorbent, and improving the The use efficiency of powder adsorbent reduces the cost of mercury removal.

The invention discloses a flue gas demercuration system and method based on the discharge and activation of halogen materials. The system comprises a pretreatment device, a dedusting device and an absorption device which are used to treat the flue gas in turn, wherein a halogen material activation device is arranged between the pretreatment device and the dedusting device, and the halogen material activation device is provided with a nozzle and a discharge reactor. The halogen material activation device injects a halogen material in the flue gas, the halogen material is activated through high voltage discharge; and after the mercury in the elementary state, of the flue gas is converted to mercury in the oxidation state and mercury in the particulate state, dedusting and absorbing are performed to remove the mercury in the oxidation state and the mercury in the particulate state. The system disclosed by the invention can effectively utilize the existing flue gas purification device to reduce the demercuration cost and increase the demercuration efficiency and the dedusting efficiency.