An integrated chlorine dioxide preparation device and method

Abstract

The invention discloses an integrated chlorine dioxide preparation device which comprises a vertical reactor body, wherein a feeding hole is formed in the upper part of the reactor body; a temperature measuring device interface and a circulation outlet are formed in the lower part of the reactor body; a seal is arranged on the top of the reactor body; a partitioning plate is arranged inside the reactor body; the reactor is divided into a main reaction chamber and a second reaction chamber; the main reaction chamber is communicated with a gas phase space in the top part of the second reaction chamber; a gas outlet and a pressure release device are arranged on the top of the gas phase space; an aeration device and a heating device are arranged at the bottom of the main reaction chamber; the partitioning plate is internally provided with a guide tube; an aeration device and an overflowing tube are arranged at the bottom of the second reaction chamber; an opening is formed in the overflowing tube on the side wall of the reactor; the reactor body is connected with an external feeding device; the external feeding device comprises a forced circulation pump, a feeder and an ejector which are formed into a circulation channel for keeping a reaction liquid be in turbulent flow state. The invention further provides a method for preparing chlorine dioxide by using the device. The device is high in reaction efficiency, safe and applicable to chlorine dioxide working condition of medium-scale output.

Description

technical field [0001] The invention relates to an integrated chlorine dioxide preparation device and method. Background technique [0002] Chlorine dioxide is a recognized high-efficiency, non-toxic, rapid and broad-spectrum sterilizing disinfectant. It has become the first choice for chlorine-based disinfectants such as liquid chlorine, sodium hypochlorite, and chloramine in the fields of water disinfection, paper pulping, and fabric bleaching. replacement product. The preparation methods of chlorine dioxide mainly include chemical method and electrolytic method. The electrolytic method has not been promoted due to the large one-time investment and high energy consumption of production; the chemical method is based on sodium chlorate, sodium chlorite, sodium hypochlorite and hydrochloric acid. , sulfuric acid, etc. as raw materials, and prepare chlorine dioxide by reacting in a chemical reactor. Due to the wide variety of chemical reactions and different properties, the ...

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Problems solved by technology

[0003] For the preparation of chlorine dioxide, the currently widely used process is to divide the reactor into more than 3 reaction chambers, and then use the gas collector to collect the gas produced in each reaction chamber and send it to the point of use (or absorption system). In terms of material, carbon steel lined with glass lining is used instead of titanium, and titanium is the most ideal material for chlorine dioxide reactors. However, due to its high price, it is mostly used in reaction devices with large-scale production. For medium-sized chlorine dioxide preparation Equipment (daily output 3-6 tons), with carbon steel lining glass-lined instead of titanium, although this reduces the one-time investment of equipment per ton output, but also greatly reduces the durability of the equipment, and because the glass-lined is fragile, the equipment The post-maintenance cost is also higher

[0004] The utility model patent "a steady-state chlorine dioxide reactor" (patent application number: 201320194842.6) discloses a horizontal chlorine dioxide reactor. The interior of the reactor is divided into 5-7 reaction chambers by partitions , but the reactor occupies a large area and has a lot of consumables. It is generally used in the working conditions with a daily output of 8 tons of chlorine dioxide and above. It is not suitable for medium-scale production of chlorine dioxide, because the reactor is adopted in large Multiple partitions are set in the reaction space to prolong the residence time of the mother liquor and prevent the short flow of the mother liquor. However, the multi-chamber structure reactor increases consumables, and is not suitable for medium-sized chlorine dioxide preparation devices in terms of one-time investment per ton of output. ; In addition, simply reduce the multi-chamber structure of the large-scale chlorine dioxide preparation device for the preparation of medium-sized chlorine dioxide, and at the same time ensure sufficient heat exchange area and aeration area, then there will be problems in the arrangement and fixation of the internal parts of the device. Limitations, not conducive to inspection and maintenance

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