新型钛混凝剂的制备及应用评估

doi:10.11962/1006-4990.2020-0249

摘要/Abstract

摘要：

随着钛工业的快速发展,钛混凝剂受到广泛关注。通过溶胶-凝胶法改性制备得到的钛凝胶混凝剂具有稳定性高、絮体生成速率快等特点,有望替代铁铝盐应用到水处理中。结合钛混凝剂的发展历程和研究现状,重点分析了钛凝胶混凝剂的应用潜力。钛凝胶混凝剂可应用于低温低浊水、含藻水和印染废水的处理以及膜前预处理,解决铁铝混凝剂应用中存在的问题。此外,通过复配使用以及污泥资源化,有望降低钛混凝剂的应用成本。

关键词: 混凝剂, 钛盐, 低温, 低浊, 膜滤

Abstract:

With the rapid development of the titanium industry,titanium coagulants have received wide attention.Titanium xerogel coagulant modified and prepared with a sol-gel method has high stability and can form large flocs in a short time,which make it a potential alternative to iron and aluminum salts for water treatment.The application potentials of titanium xe-rogel coagulant were analyzed emphatically by taking the development history and current research status of titanium coagu-lants into consideration.Titanium xerogel coagulant can be applied in many scenarios to solve the problems that met in iron and aluminum coagulation：treatment for low temperature and low turbidity water,algae-containing water,dyeing wastewater and pretreatment for membrane filtration.In addition,the application cost of the titanium xerogel coagulant might be reduced through compounding use with traditional coagulants or sludge recycling.

Key words: coagulant, titanium salt, low temperature, low turbidity, membrane filtration

中图分类号:

TQ134.11

甘永海,吴兵党,厉豪杰,李景彪,李润生,张淑娟. 新型钛混凝剂的制备及应用评估[J]. 无机盐工业, 2020, 52(9): 1-5.

Gan Yonghai,Wu Bingdang,Li Haojie,Li Jingbiao,Li Runsheng,Zhang Shujuan. Preparation and application evaluation of a novel titanium coagulant[J]. Inorganic Chemicals Industry, 2020, 52(9): 1-5.

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序号	复配比例		净化水余浊/ NTU
序号	ρ（Al₂O₃）/（mg·L^-1）	ρ（Ti）/（mg·L^-1）	净化水余浊/ NTU
1	3.0	0.0	3.0
2	2.6	0.4	1.8
3	2.0	1.0	1.8
4	1.4	1.6	1.7
5	1.0	2.0	1.8
6	0.0	3.0	1.8

铝混凝剂种类	复配比例		水温/ ℃	净化水余浊/NTU
铝混凝剂种类	ρ（Al₂O₃）/（mg·L^-1）	ρ（Ti）/（mg·L^-1）	水温/ ℃	净化水余浊/NTU
A	3.0	0.0	9	27.2
	2.0	1.0	9	6.2
	3.0	0.0	23	15.9
B	3.0	0.0	9	28.7
	2.0	1.0	9	6.2
	3.0	0.0	23	4.7

物料		化学式	单价/ （元·t^-1）	单位混凝剂用量/t	成本/ 元
钛前驱体	四氯化钛	TiCl₄	7 000	0.990	6 928
水解抑制剂	乙酰丙酮	C₅H₈O₂	7 000	0.065	455
溶剂	乙醇	C₂H₆O	2 800	0.923	2 584
水解引发剂	水	H₂O	3.8	0.281	1
总成本	没有考虑乙醇和TiO₂回用				9 968
	考虑乙醇回用				7 384
	考虑乙醇和TiO₂回用				4 024

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