Cyanamide dimerization reactor and process thereof

A technology of cyanamide and reactor, which is applied in the field of cyanamide dimerization reactor and its process, can solve the problems of difficult automation, slow temperature adjustment and control, and low liquid heat exchange efficiency, and achieve a high degree of automation , Temperature adjustment and control is fast, and the effect of improving the flow field distribution effect

Pending Publication Date: 2021-11-19
SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of cyanamide dimerization reactor and technology thereof, solve the heat exchange efficiency of the liquid in the reactor in the prior art is low, heat distribution is uneven, temperature adjustment control is slow, product output is low, Technical issues that are difficult to automate

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  • Cyanamide dimerization reactor and process thereof

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Effect test

Embodiment 1

[0038] A kind of cyanamide dimerization technique of above-mentioned device adopted in the present embodiment, comprises the following steps:

[0039] S1. Pass fluidization gas at 280°C into the reactor, control the pressure inside the reactor at 0.3MPa, and open the heat exchange device at the same time;

[0040] S2. Adjust the temperature of the heat exchange device according to the temperature and flow rate of the fluidized gas to control the temperature of the fluidized polymerization zone to be 130-200°C;

[0041] S3. After the temperature in the fluidized polymerization zone of the reactor is balanced and stable, cyanamide gas at 500-600°C is introduced;

[0042] S4. The cyanamide gas enters the fluidized polymerization zone, and undergoes a dimerization reaction under the action of a catalyst to generate a mixed gas containing dicyandiamide, and simultaneously uses a heat exchange device to cool down the fluidized polymerization zone;

[0043] S5. Separating the mixed ...

Embodiment 2

[0046] In this embodiment mode as a preferred embodiment of the present invention, a kind of cyanamide dimerization process comprises the following steps:

[0047] S1. Pass fluidization gas at 250°C into the reactor, control the pressure inside the reactor at 0.3MPa, and open the heat exchange device at the same time;

[0048] S2. Adjust the temperature of the heat exchange device according to the temperature and flow rate of the fluidized gas to control the temperature of the fluidized polymerization zone to be 130-200°C;

[0049] S3. After the temperature in the fluidized polymerization zone of the reactor is balanced and stable, cyanamide gas at 500-600°C is introduced;

[0050] S4. The cyanamide gas enters the fluidized polymerization zone, and undergoes a dimerization reaction under the action of a catalyst to generate a mixed gas containing dicyandiamide, and simultaneously uses a heat exchange device to cool down the fluidized polymerization zone;

[0051] S5. Separati...

Embodiment 3

[0054] In this embodiment mode as a preferred embodiment of the present invention, a kind of cyanamide dimerization process comprises the following steps:

[0055] S1. Pass fluidization gas at 250°C into the reactor, control the pressure inside the reactor at 0.6MPa, and open the heat exchange device at the same time;

[0056] S2. Adjust the temperature of the heat exchange device according to the temperature and flow rate of the fluidized gas to control the temperature of the fluidized polymerization zone to be 130-200°C;

[0057] S3. After the temperature in the fluidized polymerization zone of the reactor is balanced and stable, cyanamide gas at 500-600°C is introduced;

[0058] S4. The cyanamide gas enters the fluidized polymerization zone, and undergoes a dimerization reaction under the action of a catalyst to generate a mixed gas containing dicyandiamide, and simultaneously uses a heat exchange device to cool down the fluidized polymerization zone;

[0059] S5. Separati...

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Abstract

The invention relates to the technical field of cyanamide production, in particular to a cyanamide dimerization reactor and a process thereof, and the process comprises the following steps: S1, introducing fluidizing gas into the reactor, and opening a heat exchange device at the same time; S2, adjusting the temperature of a heat exchange device according to the temperature and flow of the fluidization gas to control the temperature of a fluidization polymerization area; S3, introducing cyanamide gas after the temperature of the fluidized polymerization area of the reactor is balanced and stable; S4, enabling the hydrogen cyanamide gas to enter a fluidization polymerization zone, carrying out dimerization reaction under the action of a catalyst to generate mixed gas containing dicyandiamide, and cooling the fluidization polymerization zone by using a heat exchange device; and S5, separating the mixed gas containing the dicyandiamide to obtain the dicyandiamide. In the application, the heat exchange device improves the temperature balance of the fluidization polymerization area, and improves the controllable range and efficiency of the temperature in the reactor through independent and/or grouped control.

Description

technical field [0001] The invention relates to the technical field of cyanamide production, in particular to a cyanamide dimerization reactor and a process thereof. Background technique [0002] The cyanamide gas undergoes a dimerization reaction under catalysis to generate dicyandiamide polymerization gas. When the cyanamide gas enters the polymerization reactor, it must reach the dimerization reaction temperature instantly. When the cyanamide dimerization reaction occurs, a large amount of heat of reaction is instantaneously generated. , After the dimerization reaction, the polymerization gas enters the next process. [0003] In the production process of dicyandiamide, the existing polymerization reaction process is completed in the reactor in the liquid phase state. The heat exchange efficiency of the liquid in the reactor is low, the heat distribution is uneven, the temperature adjustment and control are slow, the product output is low, and automation is difficult to a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/00B01J8/08B01J8/18B01J8/20C07C277/08C07C279/24
CPCB01J8/005B01J8/082B01J8/087B01J8/20B01J8/1818C07C277/08B01J2208/00017C07C279/24
Inventor 唐印莫玉馨孔德利宋国天冯安华
Owner SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
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