Waste heat utilization method of ethyleneimine production reaction material
A technology of ethyleneimine and materials, applied in the energy-saving field of fine chemical industry, can solve the problems of heat utilization, waste of energy, increase of production cost, etc., and achieve the effect of simple equipment and convenient use
Active Publication Date: 2021-03-12
XIAN MODERN CHEM RES INST
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Problems solved by technology
However, the processing methods of the high-temperature reaction materials in the above-mentioned patents are all: directly pass into the cooler for cooling treatment and then pass into the rectification unit, and do not use this part of the heat, wasting a lot of energy and increasing the production cost
Method used
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Embodiment 1
[0026] see figure 1 , figure 1 A schematic flow chart of a waste heat utilization method for reaction materials in the production of ethyleneimine is given.
[0027] The letter marks in it respectively indicate: E1, first heat exchanger, E2, electric heater, E3, third heat exchanger, E4, fourth heat exchanger, R, reactor, C, buffer tank;
[0028] The flow chart in the figure is: the mixed gas 1 of monoethanolamine and inert carrier gas after heating and gasification in the previous section first passes into the first heat exchanger E1, and then is heated to the reaction temperature by the electric heater E2 and then enters the reactor R , the dehydration of monoethanolamine to prepare ethyleneimine under the action of catalyst. The obtained reaction material 4 and the mixed gas 1 are counter-passed into the first heat exchanger E1, and the mixed gas 1 is heated by the remaining heat. The reaction material 5 after primary waste heat utilization is sequentially passed into th...
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The invention discloses a waste heat utilization method of an ethyleneimine production reaction material, which comprises the following steps of (1) sequentially introducing heated and gasified mixedgas of monoethanolamine and inert carrier gas into a heat exchanger I, a heat exchanger II and a reactor, reversely introducing the obtained reaction material into the heat exchanger I, and heating the mixed gas, (2) after reaction materials are discharged from the heat exchanger II, sequentially introducing the reaction materials into a heat exchanger III and a heat exchanger IV, heating reversely, sequentially introducing heat exchange media of the heat exchanger IV and the heat exchanger III, and performing phase change conversion, and (3) conveying the reaction material which is dischargedfrom the heat exchanger IV and is cooled to a proper temperature to a subsequent unit for rectification operation. The method solves the problem of reutilization of waste heat of reaction materials in the process of producing ethyleneimine by monoethanolamine intramolecular dehydration, meets the requirements of energy recycling of an ethyleneimine production process system, and has the outstanding advantages of energy conservation, consumption reduction, cost saving, continuous operation, simple equipment and convenience in use.
Description
technical field [0001] The invention belongs to the technical field of fine chemical energy saving, relates to the utilization of waste heat in the production of chemical products, in particular to a method for utilizing the waste heat of reaction materials in the production of ethyleneimine. Background technique [0002] Ethyleneimine, also known as aziridine, is a high value-added, refined nitrogen-containing specialty chemical, used in medicine, pesticides, high-energy fuels, bonding agents, fiber industry, cosmetics industry, paper industry, industrial wastewater treatment, Photosensitive materials, crosslinking agents, resin curing agents, cationic flocculants, asymmetric alkylation chiral additives and other fields have a wide range of applications. Its initial industrialized production method is the liquid-phase Wenker method. This method uses monoethanolamine as a raw material and sulfuric acid as a dehydrating agent. During the reaction process, a large amount of co...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C07D203/02C07D203/08F22B1/02F28D21/00
CPCC07D203/02C07D203/08F28D21/0001F22B1/02Y02P20/10
Inventor 梅苏宁吕剑杨建明余秦伟袁俊王为强张前惠丰李亚妮赵锋伟
Owner XIAN MODERN CHEM RES INST