Large-Scale Adsorbent Modification Coupled Injection System for Controlling the Emission of Heavy Metal Pollutants in Flue Gas

Abstract

The invention discloses a large-scale modified coupling injection system for adsorbents, which belongs to the technical field of flue gas heavy metal pollutant control. The system mainly includes: storage tank, feeder, feeding device, modified agent tank, modified host, cyclone separator, collecting hopper, feeder, gas-solid mixing accelerator, injection pipeline and air compressor, etc. During work, the adsorbent and medicament are added to the modified host according to a certain proportion, react and undergo chemical modification; the modified adsorbent is controlled by the feeder and enters the gas-solid mixing accelerator; in the gas-solid mixing accelerator, the adsorbent and gas Mix according to a certain ratio, and then spray it into the flue along the conveying pipeline to absorb and remove pollutants in the flue gas. The system is suitable for the removal of heavy metals (mercury, arsenic, lead, cadmium, chromium, etc.) and acid gases such as sulfur trioxide and hydrogen chloride in flue gas. The invention can realize large-scale on-site modification of the adsorbent, and has the characteristics of continuity and sealing.

Description

technical field

[0001] The patent of the invention belongs to the technical field of emission control of heavy metal pollutants in flue gas, and in particular relates to a large-scale adsorbent modified coupling injection system for controlling the emission of heavy metal pollutants in flue gas. Specifically, it refers to the coupled pneumatic conveying and injection system that realizes large-scale modification of adsorbents in coal-fired power plants and other sites, and removes various pollutants in flue gas through adsorption, such as heavy metals (mercury, arsenic, lead, cadmium, chromium) And strong acid gases (sulfur trioxide and hydrogen chloride), etc. Background technique

[0002] Heavy metals are enriched and difficult to degrade in the environment. The heavy metals and their compounds discharged to the outside world are very harmful to human health and the ecological environment. Taking the heavy metal mercury as an example, mercury pollutants have the character...

Examples

Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] The present invention proposes a large-scale adsorbent modified coupling injection system, such as figure 1 As shown, it includes: adsorbent storage tank 1, rotary feeder 2, frequency conversion feeding device 3, modified agent tank 4, modified host 5, cyclone separator 6, induced draft fan 7, collecting hopper 8, Roots Fan 9, emptying valve 10, feeder 11, gas-solid mixing accelerator 12, delivery elbow 13, injection pipe 14, flue 15, electric control system 16, check valve 17 and air compressor 18. The system includes two parts: a large-scale modification system and an injection system, and the two systems work together to ensure the continuity and sealing of the coupling system.

[0029] The large-scale modification system includes a feeding device and a modification and collection device. 1, 2, 3, and 4 form an adsorbent an...

technical field

[0001] The patent of the invention belongs to the technical field of emission control of heavy metal pollutants in flue gas, and in particular relates to a large-scale adsorbent modified coupling injection system for controlling the emission of heavy metal pollutants in flue gas. Specifically, it refers to the coupled pneumatic conveying and injection system that realizes large-scale modification of adsorbents in coal-fired power plants and other sites, and removes various pollutants in flue gas through adsorption, such as heavy metals (mercury, arsenic, lead, cadmium, chromium) And strong acid gases (sulfur trioxide and hydrogen chloride), etc. Background technique

[0002] Heavy metals are enriched and difficult to degrade in the environment. The heavy metals and their compounds discharged to the outside world are very harmful to human health and the ecological environment. Taking the heavy metal mercury as an example, mercury pollutants have the character...

Examples

Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] The present invention proposes a large-scale adsorbent modified coupling injection system, such as figure 1 As shown, it includes: adsorbent storage tank 1, rotary feeder 2, frequency conversion feeding device 3, modified agent tank 4, modified host 5, cyclone separator 6, induced draft fan 7, collecting hopper 8, Roots Fan 9, emptying valve 10, feeder 11, gas-solid mixing accelerator 12, delivery elbow 13, injection pipe 14, flue 15, electric control system 16, check valve 17 and air compressor 18. The system includes two parts: a large-scale modification system and an injection system, and the two systems work together to ensure the continuity and sealing of the coupling system.

[0029] The large-scale modification system includes a feeding device and a modification and collection device. 1, 2, 3, and 4 form an adsorbent an...

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