Cyanamide hydrolysis and desolventization system device

Abstract

The invention relates to a cyanamide hydrolysis desolventizing system device including a hydrolysis mechanism, a thin film evaporator, a storage tank, a dewatering tank, a vacuum pump and a condenser; an outlet pipe at the lower end of the thin film evaporator is connected with the upper end of the storage tank; the upper end of the thin film evaporator is connected with the dewatering tank through a pipeline; the upper end of the dewatering tank is connected with the vacuum pump through a pipeline; the condenser is arranged on a pipeline between the dewatering tank and the thin film evaporator; the lower end of the storage tank is connected on the upper end of the thin film evaporator through a circulation pipeline; the circulation pipeline is provided with a conveying pump; the lower end of the storage tank is provided with a finished product outlet pipe. The cyanamide hydrolysis desolventizing system device has the advantages of simple design and convenient use, and each set of equipment has the yield probably four times that of conventional equipment; heat in a cooling water pond is brought away by using a theory that heat is absorbed during gasification of liquid carbon dioxide, so that a cooling liquid in the cooling water pond is cooled, energy consumption is saved, the carbon dioxide gasification is accelerated, the cost is reduced, and the hydrolysis kettle reaction efficiency is greatly accelerated; the storage tank and the thin film evaporator make a cyanamide intermediate product circularly desolventized through the conveying pump, and the desolventizing effect is prominent.

Description

technical field [0001] The invention relates to the field of cyanamide production systems, in particular to a cyanamide hydrolysis and desolventization system device. Background technique [0002] In the past, in the production process of cyanamide, several groups of systems were required to work at the same time to achieve the production volume during desolventization. One group required two sets of air pumps. The previous production system had low safety factor, high energy consumption, and occupied a large space. In the past, a single The cooling of the cooling liquid in the cyanamide hydrolysis kettle is refrigerated by a special refrigerator, and then the cooling liquid is transported to the hydrolysis kettle, which consumes energy and costs a lot; at the same time, the carbon dioxide in the liquid carbon dioxide storage tank needs to be transported to the hydrolysis kettle in the past. It can be transported into the hydrolysis tank only when it changes from a liquid st...

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Problems solved by technology

[0002] In the past, in the production process of cyanamide, several groups of systems were required to work at the same time to achieve the production volume during desolventization. One group required two sets of air pumps. The previous production system had low safety factor, high energy consumption, and occupied a large space. In the past, a single The cooling of the cooling liquid in the cyanamide hydrolysis kettle is refrigerated by a special refrigerator, and then the cooling liquid is transported to the hydrolysis kettle, which consumes energy and costs a lot; at the same time, the carbon dioxide in the liquid carbon dioxide storage tank needs to be transported to the hydrolysis kettle in the past. It can only be transported to the hydrolysis tank from liquid to gaseous state. Usually, liquid carbon dioxide is naturally gasified at room temperature and then transported to the hydrolysis tank. However, this requires a lot of gasification time, resulting in slower production efficiency.

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