A kind of chlorine dioxide preparation device

Abstract

The invention discloses a chlorine dioxide preparation device, which comprises a preparation device body. The preparation device body comprises a chlorine dioxide generator, a sodium chloride filter, a sodium chloride dissolving device, a blasting boiling preventing device, a separator, a condenser, a condensation recovery device, an absorption tower and the sodium chloride dissolving device. The top part of the chlorine dioxide generator is communicated with the top part of the separator through a first gas delivery pipe; the middle lower part of the separator is communicated with the middle lower part of the chlorine dioxide generator through a first infusion pipe; the condenser is arranged at the bottom part of the separator; the separator and the condenser are communicated; the bottom part of the condenser is communicated with the sodium chloride dissolving device through the condensation recovery device; the bottom part of the condenser is communicated with the middle lower part of the absorption tower through a second gas delivery pipe. The chlorine dioxide preparation device provided by the invention can realize condensation recovery of gas generated by the chlorine dioxide generator.

Description

technical field [0001] The invention relates to the technical field of large-scale chlorine dioxide production in pulp and paper mills, in particular to a chlorine dioxide preparation device. Background technique [0002] As the domestic energy situation becomes more and more tense, energy costs account for an increasing proportion of manufacturing enterprises. How to achieve energy saving and consumption reduction in the production process is crucial to the production and development of enterprises, especially the reduction of resources Waste and full utilization of existing resources become the main research direction. A modern million-ton hardwood pulp mill adopting the ECF bleaching process typically has a complete set of chlorate electrolysis section and secondary The chemical workshop of the chlorine oxidation synthesis section consumes 17-20kg of ClO2 per ton of pulp and paper, and a million-ton pulp mill consumes 53 tons (100%) of chlorine dioxide per day. Due to t...

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Problems solved by technology

[0004] It is understood that there is no precedent for the technical practice of improving chlorine dioxide production technology and recovering filtrate to reduce losses in foreign large-scale pulp and paper mills, and it has not been successfully applied in similar domestic factories; The chlorine dioxide production process has not taken improvement measures to reduce the loss of sodium chlorate; the gas produced by the chlorine dioxide generator is condensed and the condensate is directly entered into the chlorine dioxide absorption tower to be mixed with the chlorine dioxide solution. Condensation recovery, which causes the loss of sodium chlorate and the decline in the quality of chlorine dioxide products; and although there are studies on the phenomenon of preventing the bumping of the mother liquor of the generator, it is still avoided by manual control, and automatic control is not realized.

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