Solid and oil removal method and device for chilled water and washed water in MTO (methanol to olefin) process
A technology for methanol to olefins and quench water, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of incomplete catalyst recovery, paralysis of water treatment system, wear and blockage of pores and other problems, to achieve the effect of reducing the probability of forming large particles, increasing the operating cycle of the equipment, and reducing the cost of membrane replacement.
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[0045] Example 1
[0046] Such as figure 1 In the device process shown, methanol enters the reactor 1 and reacts under the action of a catalyst to produce products and by-products. The products and by-products entrain part of the catalyst into the quenching tower 2 in the form of gas. The quenching water from the bottom of the quenching tower 2 has a temperature of 115°C, a catalyst content of 189 mg / L, and an oil content of 510 mg / L. Driven by the first ultrafiltration membrane feed pump 4-1, it enters the first ultrafiltration membrane module 5-1. The ultrafiltration membrane installed inside is a titanium oxide membrane. The ultrafiltration membrane works under different pressure conditions. Can add back pressure to form transmembrane pressure difference, membrane surface flow rate 5m / s, pore diameter 5nm, temperature 87℃, permeate side back pressure 0.2MPa; recoil condition is 0.8MPa, recoil period is 45min, recoil time is 6s. The titanium oxide ultrafiltration membrane conc...
Example Embodiment
[0054] Example 2
[0055] Such as figure 1 In the device process shown, methanol enters the reactor 1 and reacts under the action of a catalyst to produce products and by-products. The products and by-products entrain part of the catalyst into the quenching tower 2 in the form of gas. The quenching water from the bottom of the quenching tower 2 has a temperature of 115°C, a catalyst content of 189 mg / L, and an oil content of 510 mg / L. Driven by the first ultrafiltration membrane feed pump 4-1, it enters the first ultrafiltration membrane module 5-1. The ultrafiltration membrane installed inside is a titanium oxide membrane. The ultrafiltration membrane works under different pressure conditions. Back pressure can be added to form a transmembrane pressure difference. The transmembrane pressure difference is 0.4Mpa, pore diameter 20nm, temperature 87℃, permeate side back pressure 0.2MPa; recoil condition is 0.8MPa, recoil period is 45min, recoil time is 6s. The titanium oxide ultra...
Example Embodiment
[0063] Example 3
[0064] Such as figure 1 In the device process shown, methanol enters the reactor 1 and reacts under the action of a catalyst to produce products and by-products. The products and by-products entrain part of the catalyst into the quenching tower 2 in the form of gas. The quenching water from the bottom of the quenching tower 2 has a temperature of 115°C, a catalyst content of 189 mg / L, and an oil content of 510 mg / L. Driven by the first ultrafiltration membrane feed pump 4-1, it enters the first ultrafiltration membrane module 5-1. The ultrafiltration membrane installed inside is a titanium oxide membrane. The ultrafiltration membrane works under different pressure conditions. Back pressure can be added to form a transmembrane pressure difference, the transmembrane pressure difference is 0.4Mpa, the membrane surface flow rate is 3m / s, the temperature is 87℃, the permeate side back pressure is 0.2MPa; the backflushing condition is 0.8MPa, the backflushing period ...
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