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Recovery cyclic utilization method and apparatus for recovering discharged alkaline air in process of production of silicone hydride with magnesium silicide method

A technology of magnesium silicide and ammonia gas, applied in chemical instruments and methods, separation methods, vapor condensation and other directions, can solve the problems of inability to recover ammonia gas, low ammonia water content, pollution of the environment, etc., and achieves simple structure and protection of the atmosphere. Environment, the effect of saving consumption

Inactive Publication Date: 2008-08-27
NANJING SPECIAL GAS FACTORY
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Problems solved by technology

[0003] The magnesium silicide method is used to produce silane, and liquid ammonia is used as the medium. The water content of ammonia gas is very low. Usually, after silane is extracted, ammonia gas is also discharged to the atmosphere during the discharge of green magnesium and other residues, which seriously pollutes the environment and wastes resource
The prior art disclosed above cannot be used for the recovery of ammonia gas discharged during the magnesium silicide process

Method used

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  • Recovery cyclic utilization method and apparatus for recovering discharged alkaline air in process of production of silicone hydride with magnesium silicide method
  • Recovery cyclic utilization method and apparatus for recovering discharged alkaline air in process of production of silicone hydride with magnesium silicide method
  • Recovery cyclic utilization method and apparatus for recovering discharged alkaline air in process of production of silicone hydride with magnesium silicide method

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Embodiment Construction

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

[0020] Example: such as figure 1 , 2 , 3, the recovery and recycling equipment of discharged ammonia in the production of silane process by magnesium silicide process of the present invention is composed of ammonia recovery tank 2, condenser 5, refrigeration compressor 6 and liquid ammonia storage tank 8, and its characteristics Yes: the slag inlet on the upper part of the ammonia recovery tank is connected to the silane reaction furnace residue outlet exhaust valve 1, the overall shape of the ammonia recovery tank is a circular tank structure, and the gaseous ammonia discharged from the reaction furnace enters from the upper part of the tank (depending on silane generator pressure). The upper part of the ammonia gas recovery tank is provided with four outlet valves 3, and each outlet valve is connected to the air inlet of the condenser through each corresp...

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Abstract

The invention discloses a recovery and recycling method of the discharged ammonia during the silane production process by the process of magnesium silicide method, the process includes the steps that: the generated residues during the silane production process by the process of magnesium silicide method are discharged into an ammonia recovery tank; when the temperature and the pressure of the residues in the ammonia recovery tank increase, the ammonia escapes from the residues to reach a pressure at 0.1MPa, the ammonia enters a condenser after the dust filtration and the silane removal; the condenser is refrigerated to liquefy the ammonia; and then the liquid ammonia is arranged in a liquid ammonia storage tank for recycling. At the same time, the invention also discloses a device to implement the method of the invention. The method of the invention adopts the low-temperature technology for recovering the gaseous ammonia to be converted into the liquid ammonia to carry out the recycling, which can not only save the consumption of the liquid ammonia, but can also protect the atmospheric environment. The device of the invention has simple structure, low manufacturing cost and convenient installation.

Description

technical field [0001] The invention relates to a recovery method of ammonia gas in chemical production, in particular to a recovery and recycling method and special equipment for ammonia gas discharged in the process of producing silane by a magnesium silicide process. technical background [0002] Ammonia gas recovery technology is mostly used in the production of chemical fertilizer industry. There are circulating cooling injection tray technology, isobaric composite absorption tray technology, and low-resistance film injection tray technology, which are respectively used in carbonized ammonia recovery, isobaric recovery tower, and copper washing regeneration. Ammonia recovery tower, ammonia distillation tower. Chinese utility model patent "synthetic ammonia relaxation gas ammonia recovery device" (patent No. 200620122545) just discloses the design and method of this type of ammonia recovery. [0003] The magnesium silicide method is used to produce silane, and liquid am...

Claims

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Application Information

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IPC IPC(8): B01D5/00B01D46/00
Inventor 林培川
Owner NANJING SPECIAL GAS FACTORY
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