Gas preheater-free transformation system and method
A technology of gas preheater and conversion system, which is applied in the fields of chemical instruments and methods, inorganic chemistry, hydrogen production, etc., and can solve the problems of reduced compressive strength of the catalyst, excessive CO at the outlet of the conversion furnace, gas preheater and detoxification The tank is easy to block, etc.
Inactive Publication Date: 2017-09-19
BEIJING QING CHUANG JIN HUA TECH CO LTD
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Problems solved by technology
In the presence of liquid water and dust, the following problems will occur in the transformation section: first, the catalyst’s compressive strength is reduced and it is easy to be crushed; second, the active components of the catalyst are lost, and the activity is reduced; It hinders the contact between the synthesis gas and the catalyst and reduces the effective utilization rate of the catalyst. Fourth, for the hydrogen production process, the amount of CO at the converter outlet exceeds the standard. Fifth, a large amount of dust fills the gaps between the catalysts, reducing the effective passage space of the gas, resulting Transformer furnace resistance increases
However, this traditional process has problems such as the unsatisfactory defoaming effect of the gas-liquid separator, easy blockage of the gas preheater and detoxification tank, and high accident rate.
Method used
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Embodiment
[0033] refer to figure 1 , shows a flow chart of a conversion method without a gas preheater according to one embodiment of the present invention. The process includes a pre-shift furnace 1 and a shift furnace 2 connected in sequence. refer to figure 2 , The pre-reformer 1 includes a detoxification section 6 in the lower section and a pre-reaction section 7 in the upper section.
[0034] The synthesis gas 3 from the gasification section directly enters the detoxification section 6 in the lower section of the pre-converter 1 to remove impurity ions such as calcium, magnesium, mercury, arsenic, chlorine and entrained dust, so as to prevent the effective utilization rate of the catalyst from decreasing, The amount of CO at the converter outlet exceeds the standard, and the resistance of the converter increases. The detoxified syngas 3 enters the pre-reaction section 7 in the upper section of the pre-shift furnace 1, where 10-20% of CO undergoes a shift reaction, and the heat ...
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The invention relates to a gas preheater-free conversion system, and solves the problems that a conventional conversion working section is high in accident rate and a gas preheater and a detoxification slot are easy to block. The system comprises a pre-converter and a converter which are connected in sequence. Synthesized gas from a gasification working section firstly passes through the lower section of the pre-converter to remove ions such as calcium ions, magnesium ions, mercury ions, arsenic ions and chloride ions and entrained dust; then after being heated by the upper section of the pre-converter, the synthesized gas directly enters the converter for reaction. The converter adopts isothermal conversion or adiabatic conversion. The invention further relates to a gas preheater-free conversion method.
Description
technical field [0001] The invention relates to the technical field of syngas conversion, in particular to a conversion system and method without a gas preheater. Background technique [0002] In the field of synthesis gas preparation and application in the chemical industry, the shift reaction is used to adjust CO and H in the synthesis gas 2 The ratio of chemical products such as synthetic ammonia and natural gas is an important way to produce chemical raw materials. Taking synthetic ammonia as an example, the raw material for producing synthetic ammonia is H 2 and N 2 , but the synthesis gas generally contains a large amount of CO, its content is usually 20-70%, and it needs to be converted into H 2 . The shift reaction is to convert CO in the synthesis gas into H by reacting with water vapor at a certain temperature, pressure and catalyst. 2 and CO 2 , whose reaction formula is CO+H 2 O=H 2 +CO 2 . [0003] In the traditional process, the syngas from the scrubb...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C01B3/02C01B3/16
CPCC01B3/025C01B3/16C01B2203/04
Inventor张本凤宋丹丹王云杰王帅岳军
OwnerBEIJING QING CHUANG JIN HUA TECH CO LTD