Device and process for stilling ammonia with negative pressure

A technology of negative pressure ammonia distillation and ammonia distillation tower, which is applied in the field of ammonia distillation, can solve problems such as no good solutions, and achieve the effects of solving wastewater problems, reducing investment, and increasing concentration

Inactive Publication Date: 2014-06-04
JIGANG GRP
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Problems solved by technology

[0004] Currently, there is no good solution

Method used

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  • Device and process for stilling ammonia with negative pressure

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Embodiment Construction

[0011] Refer to the attached figure 1 The device and process for a kind of negative pressure ammonia distillation of the present invention are described in detail below.

[0012] A device for distilling ammonia under negative pressure, which includes an ammonia distillation tower, a total condenser, an ammonia vapor cooler, a reflux tank, an ammonia water reflux pump, a non-condensable gas cooler, and a vacuum jet pump; the ammonia distillation tower, a total condensation The device, ammonia vapor cooler, reflux tank and ammonia water reflux pump are connected sequentially; the outlet end of the ammonia water reflux pump is divided into two routes, one is connected with the ammonia distillation tower, and the other is sent out; the top of the reflux tank is provided with different The condensed gas cooler, the reflux tank, the non-condensable gas cooler and the vacuum jet pump form a circulation loop, and the vacuum jet pump is also connected with the gas pipeline.

[0013] A...

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Abstract

The invention discloses a device and process for stilling ammonia with negative pressure, and belongs to the ammonia stilling technology. The device comprises an ammonia stilling tower, a total condenser, an ammonia cooler, a reflux tank, and an ammonia water reflux pump, which are connected in sequence; one path of the outlet end of the ammonia water reflux pump is connected with the ammonia stilling tower and while the other path of the outlet end of the ammonia water flux pump is used for transferring to the outside; the reflux tank, a non-condensable gas cooler and a vacuum injection pump form a circulation loop; and the vacuum injection pump is also connected with a gas pipeline. The process comprises the following steps of: performing ammonia stilling for vacuum circulating ammonia water; cooling the ammonia; transferring the obtained ammonia water into the reflux tank; cooling the non-condensable gas; transferring into the reflux tank to circulate under the effect of the vacuum injection pump; refluxing the first part the ammonia water produced in the reflux tank, transferring the second part of the ammonia water to the outside as a finished product, and circulating the third part of the ammonia water as circulating liquid; and then feeding the un-absorbed tail gas into the gas pipeline. With the adoption of the device and process for stilling ammonia with the negative pressure, the vacuum condition for negative-pressure ammonia stilling can be effectively realized, so that the negative-pressure operation can be carried out; in addition, the quality of ammonia is improved, the operation cost is low, the labor intensity is small, and other characteristics are also brought.

Description

technical field [0001] The invention relates to an ammonia distillation technology, in particular to a negative pressure ammonia distillation device and process that can be widely used in coking and chemical industries. Background technique [0002] In the coking industry, the ammonia distillation process is gradually being replaced by negative pressure ammonia distillation from normal pressure ammonia distillation. The heat of negative pressure ammonia distillation is reduced, and the energy saving is remarkable. According to calculations, compared with normal pressure ammonia distillation, negative pressure ammonia distillation of the same scale can save energy consumption by 40%-60%, which is very conducive to energy saving and cost reduction for enterprises; clean production, reducing waste water generation, general conditions Under the circumstances, when using direct steam distillation, a large amount of steam condensed water will enter the wastewater system, which wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C1/10
Inventor 李瑞萍祝仰勇张顺贤魏纯玉牛爱宁宁述芹刘亮范华磊
Owner JIGANG GRP
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