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Ammonia synthesis purge gas isobaric recovery tower

A technology of purge gas and recovery tower, applied in steam condensation, ammonia preparation/separation, dispersed particle separation, etc., can solve the problems of affecting ammonia gas dissolution, high tray temperature, low recovery rate, etc., and improve the concentration of ammonia water. , the effect of uniform temperature

Inactive Publication Date: 2007-03-28
浙江交通科技股份有限公司
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Problems solved by technology

[0008] In practical application, the above-mentioned ammonia isobaric recovery tower has the following defects: the temperature distribution in the tower is extremely uneven, and the temperature of the plate without heat exchange is very high, which seriously affects the dissolution of ammonia in water, and the cooling effect is poor. The contact area between the tower and the liquid is small, and the ammonia content in the purge gas discharged from the purge gas outlet 3B on the top of the tower is about 5%; the recovery rate is low, and the recovered ammonia concentration is about 12%

Method used

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  • Ammonia synthesis purge gas isobaric recovery tower
  • Ammonia synthesis purge gas isobaric recovery tower
  • Ammonia synthesis purge gas isobaric recovery tower

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Embodiment Construction

[0024] The serial numbers in the figure are: ammonia water discharge pipe 1, ammonia water outlet 1A on the first floor, ammonia water inlet 1B on the bottom layer, ammonia water outlet 2A on the second floor, ammonia water inlet 2B on the first floor, bleed gas inlet 3A, bleed gas outlet 3B, soft water inlet 4, Liquid layer 41, tray 5, downcomer 6, downcomer nozzle 61, second layer 7, gas riser 8, gas riser nozzle 81, bottom pipe 82; absorption unit layer 10, heat exchanger 11, heat exchange The cooling water inlet 11a of the heat exchanger, the cooling water outlet 11b of the heat exchanger, the downcomer left partition 12, the downcomer right partition 121, the bubble cap 13, the tower wall 14, the gas-lifting partition 15, the gas-lifting channel 151, and the heat exchange unit Layer 16, ascending air passage 17, ascending air passage opening 171, positioning arm 172, casing 18, air outlet 181.

[0025] Fig. 2 shows a partial cross-sectional structure of the whole tower of...

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Abstract

The present invention relates to an ammonia synthesis quickly-released gas isobaric recovery tower. It is characterized by that the exterior of said tower wall is equipped with ammonia water discharging tube, quickly-released gas inlet and outlet and soft water inlet; in the tower interior several plates are mounted, and the tower interior cavity can be separated into several layers belonging to two types of unit layers by means of the above-mentioned plates, in the tower interior several spaced heat-exchange unit layers are set, in every heat-exchange unit layer a heat-exchanger is set; on the plate of absorption unit layer several axial through holes are uniformly distributed, on every through hole a bubble-cap is set, said bubble-cap is formed from vertical gas riser and cap shell. Besides, said invention also provides the working principle of said recovery tower and its concrete operation method.

Description

technical field [0001] The invention relates to a kind of chemical equipment which recovers easily soluble gas and has a large heat of dissolution, in particular belongs to an isobaric recovery tower used for recovering ammonia to synthesize purge gas in the production process of liquid ammonia. Background technique [0002] In the production process of liquid ammonia, there are usually three gases of hydrogen, nitrogen and methane in the synthesis tower. Hydrogen and nitrogen are used to synthesize liquid ammonia, but methane does not participate in the reaction. Therefore, with the continuous accumulation of methane, when it reaches a certain concentration It needs to be discharged regularly, and this gas with methane is ammonia synthesis purge gas. In addition to methane, the purge gas often contains a large amount of ammonia gas. Ammonia gas is the gas in the gasification state of liquid ammonia products. After recycling, the liquid ammonia products will be obtained. If ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/18B01D5/00C01C1/12
Inventor 毛正余郭宽新朱日良陈武忠
Owner 浙江交通科技股份有限公司
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