Leather making industrial salt recycling method and salt recycling system
An industrial salt and ultrafiltration system technology, applied in the field of tanning wastewater reuse, can solve problems such as difficulty in meeting clean production and environmental protection discharge requirements, unfavorable biochemical treatment of wastewater, etc. Effect
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[0090] Example 1
[0091] A tanning industry salt recycling system includes a wastewater collection tank, a demulsification-air flotation treatment system, an ultrafiltration system and a nanofiltration system which are sequentially connected.
[0092] The salt recycling method of the leather industry salt recycling system includes the following steps:
[0093] The salty wastewater from the tanning production soaking section is first collected in the wastewater collection tank, and then enters the demulsification-air flotation treatment system, the ultrafiltration system and the nanofiltration system in turn. The effluent from the nanofiltration system enters the tanning production pickling section , The concentrated water enters the next processing equipment.
[0094] The salt content of the salt-containing wastewater in the wastewater collection tank is 6% (wt%), the salt content of the processed water is 4.2% (wt%), and the salt content of the concentrated water is 1.8% (wt%).
Example Embodiment
[0095] Example 2
[0096] A tanning industry salt recycling system includes a wastewater collection tank, a grid tank, a demulsification-air flotation treatment system, an ultrafiltration system, and a nanofiltration system that are sequentially connected.
[0097] The salt recycling method of the leather industry salt recycling system includes the following steps:
[0098] The salty wastewater in the tanning production soaking section is first collected in the wastewater collection tank, and then enters the grid pool, demulsification-air flotation treatment system, ultrafiltration system and nanofiltration system in turn. The effluent from the nanofiltration system enters the tanning industry. In the acid pickling section of the production, the concentrated water enters the next processing equipment.
[0099] The salt content of the salty wastewater in the wastewater collection tank is 6% (wt%), the salt content of the processed water is 4.5% (wt%), and the salt content of the concen...
Example Embodiment
[0100] Example 3
[0101] A salt recycling system for tanning industry includes a wastewater collection tank, a wastewater conditioning tank, a demulsification-air flotation treatment system, an ultrafiltration system and a nanofiltration system which are sequentially connected.
[0102] The salt recycling method of the leather industry salt recycling system includes the following steps:
[0103] The salty wastewater from the tanning production soaking section is first collected in the wastewater collection tank, and then sequentially enters the wastewater conditioning tank, demulsification-air flotation treatment system, ultrafiltration system and nanofiltration system. The effluent from the nanofiltration system enters the tanning industry. In the acid pickling section of the production, the concentrated water enters the next processing equipment.
[0104] The salt content of the salt-containing wastewater in the wastewater collection tank is 6.5% (wt%), the salt content of the proc...
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