Method for increasing production capacity of acrylonitrile or methacrylonitrile
A technology of methacrylonitrile and production capacity, which is applied in the preparation of hydrocarbon ammoxidation, organic chemistry, etc., can solve the problems of high difficulty and large investment in on-site construction, achieve good technical effects and economic benefits, reduce construction intensity, and reduce construction costs. simple effect
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Embodiment 1
[0032] A set of acrylonitrile (or methacrylonitrile) production equipment adopts the propylene ammoxidation method, and the raw material gas enters the fluidized bed from the bottom at the ratio of propylene (or isobutylene): ammonia: air = 1:1:9.8 (mol) The reaction temperature is 430°C, the pressure is 0.15MPa (absolute pressure), the catalyst is molybdenum-bismuth series catalyst, and the reaction heat is recycled with soft water to generate high-pressure steam. After the reaction gas is washed, absorbed, rectified, etc., high-purity acrylonitrile or methacrylonitrile can be obtained.
[0033] An acrylonitrile or methacrylonitrile production plant with an annual output of 70,000 tons will increase its production capacity to 80,000 tons with the original reactor shell and the original cooling water pipe inlet and outlet positions unchanged. During the transformation, the diameter of the reactor shell remains unchanged at 7470mm, and the shell height remains unchanged at 17,500m...
Embodiment 2
[0035] The ratio, reaction conditions, and reaction process of the raw material gas for producing acrylonitrile or methacrylonitrile are the same as [Example 1].
[0036] An acrylonitrile or methacrylonitrile production plant with an annual output of 70,000 tons will increase the production capacity to 92,000 tons with the original reactor shell and the original cooling water pipe inlet and outlet positions unchanged. The diameter of the reactor shell remains unchanged at 7470mm, and the shell height remains unchanged at 17500mm. In order to increase the output, the supporting beam 2 is increased by 1 meter, and the height of the cooling water pipe is also increased by 1 meter. The straight pipe section is increased from the original 5790mm. To 6790mm, to withdraw the heat generated by the reaction raw materials. The inlet and outlet flanges 5 and 6 of the cooling water pipe and the support beam 2 are all used, and the cooling water pipe bundle in the cylinder is newly made. See...
Embodiment 3
[0038] The ratio, reaction conditions, and reaction process of the raw material gas for producing acrylonitrile or methacrylonitrile are the same as [Example 1].
[0039] An acrylonitrile or methacrylonitrile production plant with an annual output of 70,000 tons will increase the production capacity to 105,000 tons with the original reactor shell and the original cooling water pipe inlet and outlet positions unchanged. The diameter of the reactor shell remains unchanged at 7470mm, and the shell height remains unchanged at 17500mm. In order to increase the output, the supporting beam 2 is increased by 1.5 meters, the height of the cooling water pipe is also increased by 1.5 meters, and the straight pipe section is increased from the original 5790mm. To 7200mm, to withdraw the heat generated by the reaction raw materials. The inlet and outlet flanges 5 and 6 of the cooling water pipe and the support beam 2 are all used, and the cooling water pipe bundle in the cylinder is newly mad...
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