Long-period energy-saving melamine production system

A technology of melamine and production system, applied in the direction of sustainable manufacturing/processing, chemical industry, climate sustainability, etc., which can solve the problems of danger and environmental hazards, large fluctuations in product quality, and restrictions on the long-term stable operation level of melamine production, etc. To achieve the effect of realizing intrinsic safety and environmental protection, ensuring long-term stable operation, and optimizing energy conversion scheme
CN109369551AInactive Publication Date: 2019-02-22SHANXI YANGMEI FENGXI FERTILIZER IND GRPCO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANXI YANGMEI FENGXI FERTILIZER IND GRPCO
Publication Date
2019-02-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of melamine production and in particular relates to a long-period energy-saving melamine production system. The melamine production system comprises a reactor, a hot gas exchanger, a hot gas separator, a crystallizer, a finished cyclone separator, a tail gas exchanger and a tail gas separator connected in sequence, wherein the reactor is connected witha quick melting kettle; and the hot gas separator and the tail gas separator are respectively connected with slag pots. Compared with other processes, the melamine production system disclosed by the invention has the advantages that a liquid urine washing system is removed, standby equipment of a hot gas cooler and a filter is reduced, and investment is less; long-period stable operation is realized, and the period can reach one year or longer; a liquid urine pump, an air-cooling fan and other equipment are reduced, and due to simplified process procedures and an optimized energy conversion scheme, the process energy consumption is low; the energy consumption of ammonia back-flushing is greatly reduced, and the production cost is reduced; the tail gas is clean, equipment corrosion and wallscales can be reduced, and the influence of entrainments on later sections during tail gas utilization can be reduced; and diphenyl ether is not used in the hot gas cooling system, and production ofsolid wastes such as filter bags and the like is reduced.
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Description

technical field

[0001] The invention belongs to the technical field of melamine production, and in particular relates to a long-period energy-saving melamine production system. Background technique

[0002] Melamine production processes mainly include Ouzhi high pressure method, DSM low pressure method, and BASF atmospheric pressure gas phase extraction cooling method. Ouzhi high pressure method and DSM low pressure method are stable in operation and good in product quality, but have huge investment and high energy consumption; BASF atmospheric pressure method The gas-phase extraction cooling process and China's improved pressurized gas-phase extraction cooling process have small investment, short process and low energy consumption, but the operation cycle is short, and the product quality fluctuates greatly due to the impact of stopping feeding.

[0003] At present, the domestic production of melamine mainly adopts the BASF atmospheric pressure gas-phase extraction cooling ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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