The method of producing ammonia

 

(57) Abstract:

The method of producing ammonia from hydrocarbons, water vapor, air, includes compression and purification of raw materials from sulfur compounds, steam and air-steam catalytic conversion of methane, the conversion of carbon monoxide, treatment received nitric mixture of oxygenated compounds, compression, synthesis of ammonia in a closed loop, where the original air, nitrogen fertilizer is added and this mixture is sent to a steam-catalytic conversion of methane, the ratio of added nitrogen and air is 0.001 to 1,121. The technical result is to reduce specific consumption of hydrocarbons.

The invention relates to the production of ammonia and can be used in the chemical industry.

A method of obtaining ammonia from hydrocarbons, water vapor, air, oxygen, including cleaning of the raw material from sulfur compounds, processoriomodule catalytic conversion of methane in the mine Converter, the conversion of carbon monoxide, treatment received nitric mixture of oxygenated compounds, compression, synthesis of ammonia in a closed loop is izkuyu to the technical essence and the achieved result to the described invention is a method of producing ammonia from a hydrocarbon feedstock, water vapor, air, including compression and purification of raw materials from sulfur compounds, steam and air-steam catalytic conversion of methane, the conversion of carbon monoxide, treatment received nitric mixture of oxygenated compounds, compression and synthesis of ammonia in a closed loop [2].

This method is characterized by high specific consumption of hydrocarbons due to the feed vapor conversion of methane by oxygen amount greater than required. Oxygen binds with hydrogen and is then output from the system in the form of water. Less feeding oxygen because the quantity supplied to a steam-methane conversion of oxygen depends on the stoichiometric ratio between the main components of the gas mixture, which should be (N₂+CO)/N₂=3,0...3.04 from.

The objective of the invention is the reduction of specific consumption of hydrocarbons.

This object is achieved in that in the method of producing ammonia from hydrocarbons, water vapor air, including compression and purification of raw materials from sulfur compounds, steam and air-steam catalytic conversion of methane conversion oxide is ntes ammonia in a closed loop, according to the invention to air, nitrogen fertilizer is added and this mixture is sent to a steam-catalytic conversion of methane.

The amount of added nitrogen is equal to 0.001-1,121 from the amount of air directed to the vapor catalytic conversion of methane.

The invention is illustrated by the following examples.

Example 1.

Power unit 57,95 t/h Ammonia is produced from hydrocarbons, water vapor and air is withdrawn from the atmosphere and cleaned from dust, which komprimiert, clean raw materials from sulfur compounds on the catalyst at a temperature of 400^oTo conduct steam at a temperature of 760-825^oWith and vapor catalytic conversion of methane at the temperature at the outlet 990-1002^oC, treatment received nitric mixture of oxygenated compounds, komprimiert and carry out the synthesis of ammonia in a closed loop. To the air in quantities 50375 nm³/h add 50,37 nm³/h of nitrogen (0,001 from the air) and this mixture is sent to a steam-catalytic conversion of methane. Specific consumption of hydrocarbons is reduced by is 0.0002% (calculated using equation katipamula transition [3]).

Primatesta 20653,75 nm³/h add 23152,8 nm³/h of nitrogen (1,121 from the air) and this mixture is sent to a steam-catalytic conversion of methane. Specific consumption of hydrocarbons is reduced by 5.7% (calculation determined using equation katipamula transition [3]).

When the amount of air 20653,75 nm³/h heat resulting from the exothermic reactions is equal to the amount of heat consumed by the endothermic reactions during the steam-methane conversion, i.e. the increase in the amount of nitrogen above the specified limits is impractical.

The given examples show that when using a mixture of air with nitrogen in the vapor phase catalytic conversion decreases the flow rate of the hydrocarbon by more than 5%, which for large volumes of raw materials provides a significant positive result.

The examples show that outside the designated boundaries of 0.001-1,121 to achieve tangible economic effect cannot. When the value is less than about 0.001, the effect is small due to values approaching zero, but values higher than 1,121, it will be impossible to vapor catalytic conversion of methane, so as not to be missed heat n, S. 95-98, 211, 366.

2. Directory of apothica. - M.: Chemistry, 1986, S. 83-85, 213, 222, 360-364.

3. The Leites, I. L., Sosna, M. H., B. N. Semenov Theory and practice of chemical technologies. - M.: Chemistry, 1988, S. 165 and 166.

The method of producing ammonia from hydrocarbons, water vapor, air, including compression and purification of raw materials from sulfur compounds, steam and air-steam catalytic conversion of methane, the conversion of carbon monoxide, treatment received nitric mixture of oxygenated compounds, compression and synthesis of ammonia in a closed loop, wherein the air nitrogen fertilizer is added in the amount necessary to obtain a mixture with a ratio of nitrogen: air= 0,001-1,121 and this mixture is sent to a steam-catalytic conversion of methane.