Temperature regulating system in methylamine synthesis

Abstract

The invention provides a temperature regulating system in methylamine synthesis, wherein the temperature regulating system comprises a low-temperature heat exchanger; a first low-temperature outlet ofthe low-temperature heat exchanger communicates with a first medium-temperature inlet of an intermediate heat exchanger, and a first medium-temperature inlet of the intermediate heat exchanger communicates with a first high-temperature inlet of a high-temperature heat exchanger; a first high-temperature outlet of the high-temperature heat exchanger communicates with an inlet of the top of a methylamine synthesis tower, an outlet of the bottom of the methylamine synthesis tower communicates with an inlet of a crude product gas-liquid separation tank, the top end of the crude product gas-liquidseparation tank communicates with a condensation tank, and the bottom end communicates with a rectification system; an outlet of the rectification system communicates with a second medium-temperatureinlet of the intermediate heat exchanger. According to the system, the temperature of a material in the reaction process is recovered for heating a raw material at the inlet of a methylamine reactiontower, so that the raw material can reach the required initial temperature, and no extra energy and cost are consumed; in addition, the system can control the temperature in the reaction tower in time, the phenomenon that the temperature rises drastically is prevented, and the safety problem is effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of methylamine synthesis. Specifically relates to a temperature regulation system in the synthesis of methylamine. Background technique [0002] In the prior art, methanol and liquid ammonia are generally used as raw materials for the synthesis of methylamine. The initial reaction temperature for the reaction of methanol and liquid ammonia to form methylamine is 330-350°C. However, in the current preparation process, even if a low-temperature heat exchanger and a series of high-temperature heat exchangers are used to heat the raw materials at the same time, the maximum temperature can only reach 310°C. ℃, can not meet the requirements of the initial reaction temperature, it needs to be heated by external forces such as electric heaters to complete a large amount of extra energy and cost consumption, and the cost will be greatly increased in the process of mass synthesis. [0003] However, when the synthesi...

AI Technical Summary

Problems solved by technology

[0004] The technical problem addressed by the present invention is: in the process of producing methylamine with methanol and liquefied ammonia as raw materials, the current heating up of the raw material temperature at the inlet of the reaction tower consumes high energy and costs, and completes a substantial increase in production costs; at the same time, it is difficult to Precise and timely control of the sharp rise in temperature during the reaction process. Therefore, not only a large amount of manpower and material resources are consumed in the temperature control process, but also there are safety problems caused by the sharp rise in temperature.

Images