Urea production line

A production line and urea technology, applied in products, preparation of urea derivatives, chemical industry, etc., can solve the problems that the recovery efficiency is difficult to exceed 45%, the recovery significance is not particularly large, the mechanical loss is large, etc., and the unit power volume is superior, The effect of less influence and less corrosion and wear

Inactive Publication Date: 2015-04-01
JIANGSU FEIXIANG PUMP IND MFG CO LTD
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Problems solved by technology

[0006] For fertilizer production, since the medium is mostly in the condition of small flow and high pressure, if the hydraulic turbine unit is also used for energy recovery, due to the low specific speed, the mechanical loss is often quite large, and the recovery efficiency is generally difficult to exceed 45%. ; Moreover, the current domestic hydraulic turbine system is dominated by several big foreign brands, the price is very high, and the recycling significance is not particularly great

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  • Urea production line

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings:

[0020] With reference to accompanying drawing, urea production line is characterized in that: the outlet of stripping tower 1 is connected with energy recovery device 2 and low-pressure decomposition tower 5 respectively, the outlet of low-pressure decomposition tower 5 is connected with the inlet of low-pressure methylamine condenser 4, and low-pressure methylamine The outlet of the condenser 4 is connected with the liquid level tank and the low-pressure absorber 3, the outlet of the liquid level tank and the low-pressure absorber 3 is connected with the inlet of the high-pressure methyl ammonia pump 25 in the energy recovery device 2, and the outlet of the high-pressure methyl ammonia pump 25 is connected with the inlet of the high-pressure methyl ammonia pump 25. High pressure methylamine condenser 6 is connected. The energy recovery device 2 includes a piston t...

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Abstract

A urea production line is disclosed. An outlet of a gas stripping tower is respectively connected with an energy recovery device and a low-pressure decomposition tower. An outlet of the low-pressure decomposition tower is connected with an inlet of a low-pressure methylamine condenser, an outlet of which is connected with a level tank and low-pressure absorber. An outlet of the level tank and low-pressure absorber is connected with an inlet of a high-pressure methylamine pump in the energy recovery device. An outlet of the high-pressure methylamine pump is connected with a high-pressure methylamine condenser. High pressure energy generated during the production process of urea is recovered and converted to kinetic energy used for a production system for producing urea. Thus, consumption of electric energy during the production process is minimized, and production cost is reduced.

Description

technical field [0001] The invention relates to the field of urea production, in particular to a urea production line capable of recycling high-pressure energy generated in the production process. Background technique [0002] "Energy recovery" refers to the process of converting energy that has been used into energy that can continue to be used through a specific device. [0003] Many production processes in the petrochemical industry have a large number of fluids containing excess pressure. For these high-pressure media, a large part of these high-pressure media is currently decompressed to the required low-pressure value through a pressure reducing valve, and the energy is released or re-entered. Process flow, or direct emptying. In the process of decompression and discharge, a large amount of residual pressure energy is converted into heat energy and dissipated in the environment, causing hundreds of thousands of kilowatts of potential energy to be wasted. [0004] In ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C273/04F15B21/14
CPCY02P20/10Y02P20/141
Inventor 季裕成
Owner JIANGSU FEIXIANG PUMP IND MFG CO LTD
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