Ammonia flue gas desulfurization device and method for removing aerosol
A desulfurization device and aerosol technology, applied in the chemical industry, can solve the problems of no flue gas flow adjustment, long duration, ammonia escape, etc., and achieve the effects of improving removal efficiency, reducing emission concentration, and reducing investment costs
Active Publication Date: 2017-11-14
GUANGDONG J TECH ENVIRONMENT SCI CO LTD
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Problems solved by technology
[0004] (1) Chimney rain, PM2.5 aerosol plume tailing is obvious, the duration is long, and the environment is polluted;
[0005] (2) Ammonium sulfate falls with the entrainment of acid mist, corrodes production and living facilities, and affects the life of the factory area and nearby residents;
[0006] (3) The escape of ammonia is serious, and the loss of ammonium salt is large, which affects the economical efficiency of the desulfurization system operation
Although this technology includes an electric demisting device and a packing layer, the packing layer is set in the absorption tower, and the airflow of the flue gas is not adjusted.
Method used
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[0039] The ammonia-based flue gas desulfurization device includes a pretreatment device, a desulfurization tower device, an electric demisting device, and a flue gas discharge device from bottom to top.
[0040] After a transformation: a pre-mist removal device 2 is installed between the desulfurization tower device 1 and the electric demister device 3. The pre-mist removal device 2 is composed of a packing layer 21 and a water washing device 22. The washing spray nozzle 221 of the water washing device is located in the packing layer Between the layer and the beam 11 at the outlet of the desulfurization tower device.
[0041] The design parameters of the packing layer device are shown in Table 1:
[0042] Table 1 Design parameters of packing layer device
[0043]
[0044]
[0045] The flue gas is dedusted by the pretreatment device and then passes through the desulfurization tower to remove sulfur dioxide; the flue gas from the outlet of the desulfurization tower is spr...
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Abstract
The invention provides an ammonia-process flue gas desulfurization device achieving efficient aerosol removal. The ammonia-process flue gas desulfurization device sequentially comprises a pretreatment device, a desulfurization tower device, an electric demisting device and a flue gas emission device from bottom to top; a pre-demisting device is arranged between an outlet of the desulfurization tower device and the electric demisting device and composed of a stuffing layer and a water washing device, and flushing and spraying nozzles of the water washing device are located between the stuffing layer and a crossbeam of the outlet of the desulfurization tower device; a set of a water washing tower disc is installed between the outlet of the desulfurization tower device and the pre-demisting device. The invention further provides an ammonia-process flue gas desulfurization method. After an original desulfurization device is improved, the particle emission concentration after demisting is lowered to 9.8 mg / Nm<3> from 45.7 mg / Nm<3> and meets the ultralow emission requirement.
Description
technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to an ammonia flue gas desulfurization device and method for removing aerosol with high efficiency. Background technique [0002] Ammonia desulfurization technology, as a green desulfurization technology that meets the requirements of circular economy, has attracted more and more attention from the industry. The by-product of ammonia flue gas desulfurization is ammonium sulfate, which is a fertilizer containing nitrogen and sulfur, and has a broad market demand. More and more self-provided thermal power plants in the chemical industry use ammonia desulfurization technology to treat boiler flue gas, especially the factories that produce synthetic ammonia. In the production process, waste ammonia water is generated, and waste ammonia water is used as a desulfurizer to produce ammonium sulfate fertilizer by-product. Treat waste with waste and turn waste into treasure. [...
Claims
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IPC IPC(8): B01D50/00B01D53/79B01D53/50
CPCB01D50/00B01D53/50B01D53/79B01D2251/60
Inventor 胡小吐刘勇钟璐
Owner GUANGDONG J TECH ENVIRONMENT SCI CO LTD