Ammonium nitrate technology steam demisting apparatus
A defogging device and process technology, applied in the field of process steam washing and demisting section, can solve the problems of increasing the load and operating cost of the wastewater treatment system, increasing the washing load of the back-end neutralization scrubber, and not being able to capture aerosol particles , to achieve the effect of reducing impact, prolonging service life and improving demisting efficiency
Inactive Publication Date: 2013-05-15
XIAN ULTRA FILTRATION ENVIRONMENTAL PROTECTION TECH CO LTD
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Problems solved by technology
However, only one wire mesh demister is used to complete the above demisting, its demisting efficiency is not ideal, and it cannot capture sub-micron aerosol particles, resulting in the ammonia and ammonium nitrate content in the process steam discharged from the above washing tower. If it is too high, it will increase the washing load of the back-end neutralization scrubber, and cause the NH3-N content in the process steam to exceed the standard, increasing the load and operating costs of the wastewater treatment system
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[0017] see figure 1 , it has a casing (1), an air outlet (1-1) and a circulating fluid outlet (1-2) are respectively provided on the top and bottom of the casing, and in the casing (1) from the bottom On the top, there are a gas distributor (2), a wire mesh demister (3), a multi-layer tray (4) and an annular demister (5). The gas distributor (2) The air inlet (2-1) is the inlet of process steam, and the upper and lower shell walls of the wire mesh demister (3) are respectively provided with an upper water spray pipe (3-1) and a lower water spray pipe (3-3). -2), a water replenishment port (4-1) is provided on the shell wall above the multi-layer tray (4). The trays are preferably bubble cap trays or valve trays.
[0018] see figure 2 , in order to improve the mist removal efficiency, the annular mist eliminator (5) is composed of at least two cylindrical filter elements (5-1, 5-2) coaxially sleeved together. The inner cylinder filter element (5-1) of this example is a cyl...
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Abstract
The invention relates to an ammonium nitrate technology steam demisting apparatus, which comprises a casing (1), a gas distribution device (2), a silk screen demister (3), a multilayer column plate (4) and a filter core demister (5) are provided in the casing from down to top. According to the invention, through silk screen demisting, the column plate absorption and the multistage absorption separating of annular demisting, ammonia and ammonium nitrate mist particles with 1 micrometer can be effectively separated in the technology steam, and the demisting efficiency is greatly enhanced, thereby the droplet separating effect of a technology steam by a despumation silk screen is not ideal, so that problems that NH3-N content in a steam condensate exceeds the standard and waste water processing load is increased can be solved. According to the invention, the annular demister can capture submicron mist particles through bump, interception and Brownian diffusion mechanism, separating efficiency can be enhanced, and the separation efficiency can reach 99.9%.
Description
technical field [0001] The invention relates to an ammonium nitrate process steam defogging device, which is suitable for the process steam washing and defogging section after the neutralization reactor of ammonium nitrate and compound fertilizer. Background technique [0002] The defogging of the existing ammonium nitrate neutralization reaction process steam is to install a wire mesh demister on the top of the ammonium nitrate process steam scrubber, which can intercept the ammonia and ammonium nitrate droplets in the process steam. However, only one wire mesh demister is used to complete the above demisting, and its demisting efficiency is not ideal, and it cannot capture sub-micron aerosol particles, resulting in the ammonia and ammonium nitrate content in the process steam discharged from the above washing tower. If it is too high, it will increase the washing load of the back-end neutralization scrubber, and cause the NH3-N content in the process steam to exceed the st...
Claims
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IPC IPC(8): B01D50/00
Inventor 李旭初王明权王怀苗
Owner XIAN ULTRA FILTRATION ENVIRONMENTAL PROTECTION TECH CO LTD