Separation and recovery device, separation and recovery method, development system, and developer recycling method

A separation and recovery method for separating and recovering a solvent from a water-based development waste liquid generated by carrying out development of a flexographic-printing original plate, comprising:

• heating the water-based development waste liquid at a temperature predicted to separate the water-based development waste liquid in a static state into two layers,
• atomizing the development waste liquid heated in the heating into mists, and
• recovering the mists formed in the atomizing, wherein:
• the water-based development waste liquid contains a surfactant having a cloud point of 40° C. or less, a development residue, and water, and
• the predicted temperature is a temperature predicted based on a concentration of the development residue in the water-based development waste liquid, a concentration of the surfactant in the water-based development waste liquid, and a pH of the water-based development waste liquid.

A separation and recovery method for separating and recovering a solvent from a water-based development waste liquid generated by developing a flexographic-printing original plate, comprising:

• heating the water-based development waste liquid at a temperature predicted to cause separation of the water-based development waste liquid in a static state into two layers,
• atomizing the development waste liquid heated in the heating into mists, and
• recovering the mists formed by the atomizing, wherein:
• the water-based development waste liquid contains a surfactant having a cloud point of 40° C. or less, a development residue, water, and a compound represented by the following formula (1) and/or a compound represented by the following formula (2):
• Formula (1):
• R1O(A1O)nR2 (wherein, R1 and R2 each independently represent an alkyl group having 2 to 6 carbon atoms or an alkenyl group having 2 to 6 carbon atoms, A1 represents an alkylene group having 2 to 4 carbon atoms, and n is an integer of 1 to 5)
• Formula (2):
• R3O(A2O)mH (wherein, R3 represents an alkyl group having 3 to 8 carbon atoms or an alkenyl group having 3 to 8 carbon atoms, A2 represents an alkylene group having 2 to 4 carbon atoms, and m is an integer of 1 to 5), and
• the predicted temperature is a temperature predicted based on a concentration of the development residue in the water-based development waste liquid, a concentration of the surfactant in the water-based development waste liquid, a pH of the water-based development waste liquid, and a total concentration of the compounds represented by the formulas (1) and (2) in the water-based development waste liquid.

A separation and recovery method for separating and recovering a solvent from a water-based development waste liquid generated by developing a flexographic-printing original plate, comprising:

• determining a heating temperature of the development waste liquid,
• heating the development waste liquid at the temperature determined in the heating-temperature determining,
• atomizing the development waste liquid heated in the heating into mists, and
• recovering the mists formed by the atomizing, wherein:
• the development waste liquid can be separated into two layers different in dispersion concentration of a development residue by heating, and
• a temperature to be determined in the heating-temperature determining is calculated from a temperature at which the development waste liquid is separated and satisfies the following formulas (4) and (5):
• [
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• .
• 5
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• 1
• 1
• +
• exp
• ⁡
• (
• -
• z
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• ≥
• 0.5
• Formula
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• (
• 4
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• [
• Math
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• 6
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• z
• =
• -
• 0.60713385
• ×
• W
• -
• 2.03591046
• 1.56737401407577
• -
• 1.27547875
• ×
• Ca
• -
• 2.45178061
• 1.26267792013641
• +
• 0.93568397
• ×
• pH
• -
• 10.09333333
• 0.301256627
• +
• 3.17537577
• ×
• T
• -
• 51.25
• 7.96476616
• +
• 3.30903047
• Formula
• ⁢
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• 5
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• (wherein, W is a concentration (mass %) of the development residue in the water-based development waste liquid, Ca is a concentration (mass %) of the surfactant in the water-based development waste liquid, pH is a pH of the water-based development waste liquid, and T is a temperature (° C.) of the water-based development waste liquid).