Low-carbon olefine production device
A production device and a technology for low-carbon olefins, which are applied in the field of low-carbon olefin production devices, can solve problems such as low yield of low-carbon olefins, and achieve the effects of improving yield and increasing output
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Embodiment 1
[0021] in such as figure 1In the shown reaction device, the methanol raw material with a purity of 99.5% enters the first fluidized bed reaction zone, contacts with the SAPO-34 catalyst, and the generated gas phase stream and catalyst enter the settler, and the gas phase stream after gas-solid separation enters the first fluidized bed reaction zone. In the second fluidized bed reaction zone, the separated catalyst is divided into two parts after stripping. In terms of mass fraction, 30% is sent to the regenerator for regeneration, and 70% is returned to the first fluidized bed reaction zone. The regenerated catalyst enters the third fluidized bed reaction zone and contacts with raw materials including C4 olefins, and the generated gas phase stream and catalyst enter the second fluidized bed reaction zone, and the gas phase stream in the second fluidized bed reaction zone undergoes gas-solid separation After entering the separation section, the separated catalyst is returned to...
Embodiment 2
[0024] According to the conditions and steps described in [Example 1], the catalyst separated by the settler is divided into two parts after stripping. In terms of mass fraction, 70% goes to the regenerator for regeneration, and 30% returns to the first fluidized bed reaction zone . The mass content of C4 olefins in the raw material including C4 olefins is 87%, and the rest is water vapor. The reaction conditions in the first fluidized bed reaction zone are: the reaction temperature is 500°C, the reaction pressure is 0.01MPa in gauge pressure, and the gas phase line The velocity is 2.5 m / s; the reaction conditions in the second fluidized bed reaction zone are: the reaction temperature is 600 ° C, the reaction pressure is 0.01 MPa in terms of gauge pressure, and the gas phase velocity is 1 m / s; the third fluidized bed reaction zone The reaction conditions are as follows: the reaction temperature is 650°C, the reaction pressure is 0.01MPa in terms of gauge pressure, the gas phas...
Embodiment 3
[0027] According to the conditions and steps described in [Example 1], the catalyst separated by the settler is divided into two parts after stripping, in terms of mass fraction, 50% goes to the regenerator for regeneration, and 50% returns to the first fluidized bed reaction zone . The mass content of C4 olefins in the raw material including C4 olefins is 76%, and also includes 12% of C5 olefins, and the rest is water vapor. The reaction conditions in the first fluidized bed reaction zone are: the reaction temperature is 470°C, and the reaction pressure is expressed in the table The pressure gauge is 0.01MPa, the gas phase velocity is 1.5 m / s; the reaction conditions in the second fluidized bed reaction zone are: the reaction temperature is 570°C, the reaction pressure is 0.01MPa in terms of gauge pressure, and the gas phase velocity is 0.7 m / s ; The reaction conditions in the third fluidized bed reaction zone are as follows: the reaction temperature is 610°C, the reaction pr...
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