Method for purifying quench water and scrubbing water from mto by mini-hydrocyclone and apparatus used for same

An apparatus for removing solids from methanol-to-olefins MTO quench water and scrubbing water via mini-hydrocyclone separation, comprising:

• a mini-hydrocyclone separator which is connected with a quench tower and used for removing the entrapped catalyst particles from the MTO quench water via mini-hydrocyclone separation;
• a quench water cooler which is connected with said mini-hydrocyclone separator and used for cooling the quench water purified via mini-hydrocyclone separation so as to effect the recycling of water;
• a scrubbing tower which is connected with said quench tower and used for scrubbing the product olefins separated in said quench tower to further remove the catalyst particles from the product olefins;
• a mini-hydrocyclone separator which is connected with said scrubbing tower and used for removing the entrapped catalyst particles from the MTO scrubbing water via mini-hydrocyclone separation;
• a scrubbing water cooler which is connected with said mini-hydrocyclone separator and used for cooling the scrubbing water purified via mini-hydrocyclone separation so as to effect the recycling of water;
• a mini-hydrocyclone separator for the quench water to be stripped which is connected with said mini-hydrocyclone separator and used for removing the trace amount of catalyst from the quench water to be stripped;
• and a stripping water pump which is connected with said mini-hydrocyclone separator for the quench water to be stripped and used for transferring the purified stripping water to a stripping tower.