Equipment and method for producing sodium dichloroisocyanurate

Abstract

The invention discloses equipment and a method for producing sodium dichloroisocyanurate. The equipment mainly comprises a chlorine source (1), a vaporizer (2), a buffer tank (3), a waterflow vacuum pump (4), a reactor (5) and a circulating pump (6), wherein the chlorine source (1) is connected with a gas inlet of the buffer tank (3) through the vaporizer (2); a gas outlet of the buffer tank (3) is connected with a gas inlet of the waterflow vacuum pump (4); a liquid outlet of the reactor (5) is connected with a liquid inlet of the waterflow vacuum pump (4) through the circulating pump (6); and an outlet of the waterflow vacuum pump (4) extends into the middle lower part of the reactor (5) through a connecting pipe. By the equipment and the method, conversion rate of the sodium dichloroisocyanurate is increased to 90 to 95 percent; the reaction time is reduced by about over 30 percent; the yearly processing capacity is improved by 30 percent; and the pressure in the reactor (5) is controlled to be normal pressure or slightly negative pressure.

Description

technical field [0001] The present invention relates to a kind of production method of sodium dichloroisocyanurate, specifically, relate to a kind of production method of sodium dichloroisocyanurate that utilizes water flow vacuum pump to carry out chlorination reaction. Background technique [0002] Sodium dichloroisocyanurate (sodium dichloroisocyanurate) is called for short DCCNa, and the trade name is excellent chlorine net, is a kind of important chemical product, and its structural formula is shown in the following formula: [0003] [0004] Sodium dichloroisocyanurate is a high-efficiency, broad-spectrum, new type of systemic fungicide, which has a strong biocidal effect, and the bactericidal rate reaches 99% at 20ppm. Can kill all kinds of bacteria, algae, fungi and germs. Sodium dichloroisocyanurate has stable chemical properties, and the effective chlorine will not drop by more than 1% within half a year of storage under dry conditions, which is convenient for ...

AI Technical Summary

Problems solved by technology

In addition, there is always a certain amount of chlorine gas in the entire vaporization system and pipelines. Therefore, when replacing the liquid chlorine cylinder (chlorine source), the residual chlorine in the pipeline must be sucked up with a vacuum pump before the chlorine source can be replaced. The operation is cumbersome and leads to increased costs

[0015] (2) When the chlorination reaction of dichloroisocyanuric acid reaches the end of the reaction, the material exists in the liquid in a crystalline state, and the crystalline particles can easily block the gas distributor, resulting in uneven distribution of the gas distributor, so the gas distribution needs to be cleaned regularly device, resulting in shutdown

[0016] (3) Due to the structure and resistance of the gas distributor, the distribution of chlorine gas is not very uniform, which leads to the phenomenon that the concentration of chlorine gas in some areas of the material is high, and the concentration of chlorine gas in some areas is low

At the same time, chlorine gas exists in the form of bubbles in the material, and the bubbles rise rapidly in the liquid, resulting in a short residence time, that is, the chlorination reaction time period, and the reaction absorption rate is low

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