Process for reselecting, blasting, oxidizing and purifying and device thereof
A technology of process and process water, applied in the field of gravity separation blast oxidation purification process and its device, to achieve the effect of less equipment, easy maintenance and cleaning, and short equipment treatment cycle
Active Publication Date: 2014-10-01
BEIJING BEIKE ENVIRONMENTAL ENG CO LTD
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Problems solved by technology
[0004] The technical problem to be solved in the present invention is to provide a gravity separation blast oxidation purification process and its device for the purification and reuse of alkaline industrial solid waste such as chlor-alkali plant alkali slag and calcium carbide slag
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[0017] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0018] Aiming at the problem of purification and reuse of alkaline industrial solid wastes such as alkali slag and calcium carbide slag from chlor-alkali plants, the invention provides a gravity separation blast oxidation purification process and a device thereof.
[0019] Such as figure 1 Shown, is the structure schematic diagram of gravity blast oxidation purification device of the present invention, and this device comprises water outlet 1, slurry outlet 2, slag outlet 3, Roots fan blast inlet 4, filter screen 5, material and Process water inlet 6, slag water mixing zone 7; among them, the water outlet 1, the pulp outlet 2 and the slag outlet 3 are arranged on the same side of the device, and the water outlet 1 is located above the pulp outlet 2, and ...
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Abstract
The invention provides a process for reselecting, blasting, oxidizing and purifying and a device thereof, and belongs to the field of environmental engineering. The process is as follows: adding waste residue and process water by utilizing an embedded type pipeline in an aeration mixing tank, blasting air in the aeration mixing tank by a blasting device at the lower end, so that Ca(OH)2 becomes carbonate precipitates. A high Cl-clear liquid at the upper layer of the mixing tank is overflowed by an overflow tube on the top of the tank. Under action of oxidizing air and water flow, fine alkaline suspended matters and impurity insoluble with small grain size are separated from lower-layer slurry by a reselecting principle through a filter net, wherein insolubles on the bottom are exhausted outsides by a slag outlet; and finally, deeply-treated CaCO3 slurry is exhausted by the slurry outlet. The exhausted CaCO3 slurry not only can be used as a wet-process desulfurizing agent, but also can be press-filtered and dehydrated as a calcium carbonate superfine material. The CaCO3 purified by the treatment method disclosed by the invention has excellent alkalinity and smaller particle dimension, so that cost is saved, stacking of chemical waste residues such as alkaline residue and carbide slag is reduced, and balanced development of economic and social benefits is realized.
Description
technical field [0001] The invention relates to the field of environmental engineering, in particular to a gravity separation blast oxidation purification process and a device thereof. Background technique [0002] Carbide slag and chlor-alkali plant alkali slag are industrial solid wastes, most of which are Ca(OH) 2 and CaCO 3 It is a substance with high purity and strong alkalinity, and has the conditions to be used in processes such as flue gas desulfurization and ultrafine calcium carbonate raw material collection, but it is mixed with SiO 2 、Al 2 o 3 , acidic insolubles and other large particles of impurities, if directly used will inevitably result in reduced purity or increased energy consumption. Therefore, the purification process for this type of industrial solid waste is particularly important. If the successful extraction of active ingredients can be achieved, it can not only alleviate the current raw material supply problem of ultra-fine calcium carbonate, b...
Claims
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IPC IPC(8): C01F11/18
Inventor 宋存义卢熙宁童震松常冠钦邢奕汪莉梁宝瑞王森林
Owner BEIJING BEIKE ENVIRONMENTAL ENG CO LTD