阅读说明：本技术 一种采用新型换热方式的尿素水解装置 (Urea hydrolysis device adopting novel heat exchange mode ) 是由 贾林权 牛国平 王晓冰 张广才 常磊 袁壮 姚柳 于 2020-11-16 设计创作，主要内容包括：本发明公开了一种采用新型换热方式的尿素水解装置,包括尿素水解反应器壳体、蒸汽喷射器装置、蒸汽输入管道、蒸汽回收器、疏水管道及产品气管道,其中,尿素水解反应器壳体的侧面设置有尿素溶液入口,蒸汽喷射器装置位于尿素水解反应器壳体内,蒸汽输入管道与蒸汽喷射器装置的入口相连通,尿素水解反应器壳体顶部的出口与蒸汽回收器的入口相连通,蒸汽回收器的顶部出口与产品气管道相连通,蒸汽回收器的底部出口与疏水管道相连通,该装置能够有效解决反应器内加热盘管腐蚀损坏的问题,可靠性较高,使用寿命长。(The invention discloses a urea hydrolysis device adopting a novel heat exchange mode, which comprises a urea hydrolysis reactor shell, a steam ejector device, a steam input pipeline, a steam recoverer, a drain pipeline and a product gas pipeline, wherein a urea solution inlet is formed in the side surface of the urea hydrolysis reactor shell, the steam ejector device is positioned in the urea hydrolysis reactor shell, the steam input pipeline is communicated with the inlet of the steam ejector device, an outlet at the top of the urea hydrolysis reactor shell is communicated with the inlet of the steam recoverer, an outlet at the top of the steam recoverer is communicated with the product gas pipeline, and an outlet at the bottom of the steam recoverer is communicated with the drain pipeline.)

1. The utility model provides an adopt urea hydrolysis device of novel heat transfer mode, a serial communication port, including urea hydrolysis reactor casing (1), steam ejector device (2), the steam input pipeline, steam recovery ware (3), drain line and product gas pipeline, wherein, the side of urea hydrolysis reactor casing (1) is provided with the urea solution entry, steam ejector device (2) are located urea hydrolysis reactor casing (1), the steam input pipeline is linked together with the entry of steam ejector device (2), the export at urea hydrolysis reactor casing (1) top is linked together with the entry of steam recovery ware (3), the top export of steam recovery ware (3) is linked together with the product gas pipeline, the bottom export and the drain line of steam recovery ware (3) are linked together.

2. The urea hydrolysis device adopting the novel heat exchange mode as claimed in claim 1, wherein an outlet at the top of the urea hydrolysis reactor shell (1) is communicated with an inlet of the steam recoverer (3) through a mixed gas pipeline.

3. The urea hydrolysis device adopting the novel heat exchange mode as claimed in claim 1, wherein the steam input pipeline is provided with a regulating valve.

Technical Field

The invention relates to a urea hydrolysis device, in particular to a urea hydrolysis device adopting a novel heat exchange mode.

Background

The urea hydrolysis technology is successfully applied to the chemical industry as early as 80 years in the 20 th century, and the problem of environmental protection of water body discharge of a device for synthesizing ammonia and urea is solved. The urea hydrolysis chemical reaction equation is as follows: CO (NH2)2 (urea) + H2O → 2NH3 (ammonia) + CO2 (endothermic reaction).

The urea hydrolysis system is available from Siirtec Nigi, ItalyProcess and products of Wahlco and Hamon, USAAnd (5) processing. Because the Ammogen technology is older and obsolete, no Ammogen hydrolysis system has been applied in China at present, andthe hydrolysis process is adopted in domestic power plants, and urea hydrolysis technology is adopted in denitration projects of multiple power plants such as a 2X 350MW unit of a Wuhan Qingshan power plant, a 6X 200MW unit of a Dada second power plant, a 2X 630MW unit of a Chengdu Jintang power plant, a 2X 660MW unit of a Huaneng left power plant and the like.

The urea hydrolysis technology represented by the U2A technology is used for denitration of boiler flue gas, and the application range of the urea hydrolysis technology is expanded.

Each technique, however, suffers from certain drawbacks. Urea hydrolysis (catalysis) and general hydrolysis share common problems: the heating coil pipe in the urea hydrolysis reactor equipment is corroded and damaged, the service life of the urea hydrolysis reactor is seriously influenced, and the risk is brought to the continuous operation reliability of the denitration device.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a urea hydrolysis device adopting a novel heat exchange mode, which can effectively solve the problem of corrosion and damage of a heating coil in a reactor, and has the advantages of high reliability and long service life.

In order to achieve the purpose, the urea hydrolysis device adopting the novel heat exchange mode comprises a urea hydrolysis reactor shell, a steam ejector device, a steam input pipeline, a steam recoverer, a water drainage pipeline and a product gas pipeline, wherein a urea solution inlet is formed in the side face of the urea hydrolysis reactor shell, the steam ejector device is located in the urea hydrolysis reactor shell, the steam input pipeline is communicated with the inlet of the steam ejector device, an outlet in the top of the urea hydrolysis reactor shell is communicated with the inlet of the steam recoverer, an outlet in the top of the steam recoverer is communicated with the product gas pipeline, and an outlet in the bottom of the steam recoverer is communicated with the water drainage pipeline.

An outlet at the top of the urea hydrolysis reactor shell is communicated with an inlet of the steam recoverer through a mixed gas pipeline.

The steam input pipeline is provided with a regulating valve.

The invention has the following beneficial effects:

when the novel heat exchange type urea hydrolysis device is in specific operation, the heating coil is cancelled, heating steam is directly introduced into the urea hydrolysis reactor shell, the urea solution is heated through the heating steam, so that the heat requirement of urea pyrolysis reaction is met, and the product gas output by the urea hydrolysis reactor shell is recycled through the steam recoverer, so that the problem of crystallization corrosion of a urea hydrolyzer body and a subsequent product gas pipeline is solved, the reliability is high, and the service life is long. Meanwhile, a heating coil is omitted, the system operation cost is reduced, and the purpose of stable operation is achieved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Wherein, 1 is a shell of the urea hydrolysis reactor, 2 is a steam ejector device, and 3 is a steam recoverer.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

referring to fig. 1, the urea hydrolysis device adopting the novel heat exchange mode according to the present invention includes a urea hydrolysis reactor housing 1, a steam ejector device 2, a steam input pipeline, a steam recoverer 3, a drain pipeline and a product gas pipeline, wherein a urea solution inlet is disposed on a side surface of the urea hydrolysis reactor housing 1, the steam ejector device 2 is located in the urea hydrolysis reactor housing 1, the steam input pipeline is communicated with an inlet of the steam ejector device 2, an outlet at a top of the urea hydrolysis reactor housing 1 is communicated with an inlet of the steam recoverer 3, an outlet at a top of the steam recoverer 3 is communicated with the product gas pipeline, an outlet at a bottom of the steam recoverer 3 is communicated with the drain pipeline, and an outlet at the top of the urea hydrolysis reactor housing 1 is communicated with an inlet of the steam recoverer 3 through a mixed gas pipeline; the steam input pipeline is provided with a regulating valve.

Steam (180 ℃, 1Mpa) enters the shell 1 of the urea hydrolysis reactor through the steam ejector device 2 and is uniformly mixed with the urea solution to achieve gas-liquid two-phase mixing and meet the heat required by the urea hydrolysis reactor. The urea hydrolysis reaction is fully performed in a high-temperature environment, and the produced ammonia gas, carbon dioxide and steam pass through a steam-water recoverer, are removed, and then enter a downstream pipeline.

The device that this patent provided will solve the problem that present ubiquitous thermal power factory denitration urea system heating coil pipe and product trachea way corrode the crystallization, has improved the operational reliability and the equipment life of urea system of hydrolysising more, has stronger practicality.