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An ammonia method for recovery of flue gas co 2 Co-production process with urea

A joint production and flue gas technology, applied in the preparation of organic compounds, products, urea derivatives, etc., to achieve the effects of reducing excessive consumption, reducing analysis and compression links, and reducing energy consumption

Active Publication Date: 2021-10-19
锦西天然气化工有限责任公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of this, the invention provides an ammonia method to recover flue gas CO 2 A process of joint production with urea, to at least solve the problems of cost and other problems in the prior art when using MEA decarbonization for urea production

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  • An ammonia method for recovery of flue gas co <sub>2</sub> Co-production process with urea
  • An ammonia method for recovery of flue gas co <sub>2</sub> Co-production process with urea
  • An ammonia method for recovery of flue gas co <sub>2</sub> Co-production process with urea

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specific Embodiment

[0031] According to the process flow of the above-mentioned joint production, a set of process method is specifically designed in this embodiment, and compared with the MEA decarburization joint production method in the prior art.

[0032] 1, the parameter designed according to the technological process provided by the present invention is as follows:

[0033] 1.1. Recovery of CO 2 Quantity according to 2000Nm 3 / hr calculation without considering CO 2 recovery, since the system CO 2 The amount is enough.

[0034] 1.2. Since the final result of this process is to deliver the required ammonium bicarbonate solution for the urea system, the absorbent undergoes CO 2 After absorption, the produced kettle liquid should first meet the requirements of the urea plant, and the composition of the kettle liquid is about NH 3 31%, CO 2 33%, H 2 O35%, solution volume 11.9t / h.

[0035] 1.3. It adopts the 8.8KPa pressure operation designed by the original fan outlet.

[0036] 2. Comb...

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Abstract

The invention discloses an ammonia method for recovering flue gas CO 2 Co-production process with urea, using ammonia as CO 2 The carrier agent, that is, absorbing CO with ammonia 2 , the formed ammonium bicarbonate liquid does not need to be regenerated, and returns directly to the urea plant in the liquid phase, abandoning the original alcohol amine absorption process, reducing the excessive consumption of alcohol amine liquid and the high consumption and high cost caused by regeneration. At the same time, considering the cost of the urea plant Process parameters and capabilities, the absorbed ammonium bicarbonate solution is directly sent to the low-pressure, medium-pressure or high-pressure system of urea, reducing CO 2 The parsing and compression links to reduce energy consumption.

Description

technical field [0001] The disclosure of the invention relates to the technical field of urea production, in particular to an ammonia method for recovering flue gas CO 2 Co-production process with urea. Background technique [0002] At present, in the production process of urea, liquid ammonia and gaseous carbon dioxide are mainly used as raw materials for reaction to obtain urea. In the prior art, on the one hand, in order to save energy, on the other hand, in order to supplement the shortage of carbon dioxide in urea production, a set of flue gas CO2 is usually established. 2 Recovery device, after the flue gas is decarburized by the atmospheric pressure MEA decarbonization device, it is introduced into the urea production equipment for urea production. Carry out the cost assessment of the above-mentioned MEA decarburization, as shown in the following table: MEA decarburization assessment results (per 1000Nm 3 Product CO 2 count) [0003] project unit Uni...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C273/04
CPCC07C273/04Y02P20/141
Inventor 李永华吴珂张晓晖石枫李泊王素岩徐海婴张玉轩
Owner 锦西天然气化工有限责任公司
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