氯化法钛白副产物资源化利用研究

董林辉; 喻经纶; 范浩; 朱文渊; 李风亭; 伏振宇

doi:10.7513/j.issn.1004-7638.2021.03.015

氯化法钛白副产物资源化利用研究

doi: 10.7513/j.issn.1004-7638.2021.03.015

1.
深圳市长隆科技有限公司，广东深圳 518116
2.
同济大学环境科学与工程学院，上海 200092

基金项目: 深圳市重大技术攻关项目（重20170491）

详细信息

作者简介:
董林辉(1985—)，男，湖北应城人，本科，深圳市高层次人才，主要从事副产物资源化利用研究，高效水处理药剂开发、生产工艺优化及应用研究，E-mail：donglinhuibskl@126.com；

通讯作者:
伏振宇(1987— )，男，博士，主要从事新型高效水处理药剂和材料研发，E-mail：13510861290@163.com

中图分类号: TF823,X757
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出版历程
- 收稿日期: 2020-08-05
- 刊出日期: 2021-06-10

Study on resource utilization of by-products of chloride titanium dioxide

1.
Shenzhen Changlong Technology Co., Ltd., Shenzhen 518116, Guangdong, China
2.
College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China

摘要

摘要: 以氯化法钛白粉生产过程中的副产物废盐酸和氯化尾气吸收液、工业氢氧化铝和七水硫酸亚铁为原料, 在双氧水催化氧化条件下, 制备得到一系列新型无机高分子混凝剂聚合氯化硫酸铝铁(PAFCS)，其外观为红褐色透明液体, 体积密度1.39～1.43 g/cm³, 全铁与三氧化二铝（TFe+Al₂O₃）总含量≥10.5%, 可以用作水处理用混凝剂。与市售混凝剂相比，制备所得聚氯化硫酸铝铁对高化学需氧量（COD）的垃圾渗滤液生化尾水有较好的处理效果, COD去除率达到68.51%, 优于传统混凝剂聚合硫酸铁。高效聚合氯化硫酸铝铁的制备为我国氯化法钛白粉生产工艺中副产物的资源化利用提供了解决思路和可行方法。
- 氯化法钛白粉 /
- 废盐酸 /
- 尾气 /
- 资源化利用 /
- 混凝剂 /
- 聚氯化硫酸铝铁 /
- COD /
- 去除率
Abstract: In this paper, a series of new inorganic polymer coagulants (Polymeric Aluminum Ferric Chloride Sulfate, PAFCS) were prepared by using waste hydrochloric acid and chlorinated tail gas absorbing liquid from by-products of the production of titanium dioxide, in combination with industrial aluminum hydroxide and ferrous sulfate heptahydrate, under the conditions of hydrogen peroxide catalytic oxidation. The appearance of the prepared PAFCS was a reddish-brown transparent liquid with a density of 1.39 to 1.43 g/cm³, and the total content of iron and alumina (TFe + Al₂O₃) was ≥10.5%, which could be used as coagulant for water treatment. The PAFCS prepared in this paper were used to treat landfill leachate biochemical tail water, in which the removal rate of COD reached 68.51%, which was superior to the traditional coagulant polymeric ferric sulfate (PFS). At the same time, this work provides ideas for solving the problem of resource utilization and clean production of by-products in the production process of titanium dioxide by chlorination method in China.
- chlorinated titanium dioxide /
- waste hydrochloric acid /
- chlorinated tail gas /
- resource utilization /
- coagulant /
- polymeric aluminum ferric chloride sulfate /
- COD /
- removal rate

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图 1 氯化法钛白生产工艺流程

Figure 1. Process diagram of TiO₂ pigment production by chlorination process

下载: 全尺寸图片幻灯片

图 2 PAFCS制备工艺流程

Figure 2. Process diagram of PAFCS preparation

下载: 全尺寸图片幻灯片

图 3 不同n（Fe）∶n（Al₂O₃）对混凝效果的影响

Figure 3. Effect of different n（Fe）∶n（Al₂O₃）on coagulation

下载: 全尺寸图片幻灯片

图 4 pH值对混凝效果的影响

Figure 4. Effect of pH on coagulation

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图 5 混凝剂对印染生化尾水的去除效果

Figure 5. Removal efficiency of coagulant on printing and dyeing biochemical tail water

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图 6 混凝剂对造纸生化尾水去除效果

Figure 6. Removal efficiency of coagulant on paper-making biochemical tail water

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表 1 不同类型PAFCS的物料组成

Table 1. Material compositions of different types of PAFCS

编号	n（Fe）：n（Al₂O₃）	配比/ g
编号	n（Fe）：n（Al₂O₃）	废盐酸	氢氧化铝	氯化尾气吸收液	七水硫酸亚铁	双氧水
P-1	6∶1	102	8	48	162	62
P-2	4∶1	82	8	32	108	41
P-3	2∶1	62	8	16	54	20

下载: 导出CSV

表 2 不同类型PAFCS的性能参数

Table 2. Performance parameters of the different types of PAFCS

序号	n（Fe）∶n（Al₂O₃）	全铁含量/%	Al₂O₃含量/%	密度/ (g·cm⁻³)	盐基度/%	pH值（1%水溶液）
P-1	6∶1	8.77	1.48	1.43	11.21	2.57
P-2	4∶1	8.19	2.08	1.42	14.81	2.89
P-3	2∶1	6.82	3.46	1.39	15.62	3.12

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表 3 自制PAFCS与市售聚合硫酸铁混凝剂处理垃圾渗滤液的效果试验

Table 3. Treatment of landfill leachate with PAFCS and commercial polyferric sulfate coagulant

投加量/（mg·L⁻¹）	聚氯化硫酸铝铁（P-3）		聚合硫酸铁（P-0）
投加量/（mg·L⁻¹）	出水COD/（mg·L⁻¹）	出水COD去除率/ %	出水COD/（mg·L⁻¹）	出水COD去除率/ %
2 000	469.1	51.83	543.9	43.99
2200	449.2	53.93	506.5	47.91
2400	429.2	56.02	467.4	52.01
2600	310.2	68.51	474.4	51.28
2800	365.8	62.68	470.0	51.74
3000	406.6	58.39	491.4	49.19

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参考文献(12)

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