SQ-06LiⅡ型锂吸附剂特点
苏青研发的SQ-06LiⅡ型提锂吸附剂,在第一代锂吸附剂基础上作了很大的改进,采用新型纳米材料,复合致孔剂以及特殊的造粒工艺,外观规整(球形,行业唯一)、比表面积大、选择性高、各项性能显著提升,同等条件下吸附容量比同类产品高50-60%,同时该产品洗脱方便、解析率高、溶损率低、使用耐久性好,产品性能实现了质的飞跃。
The SQ-06Li Ilithium extraction adsorbent developed by Suqing is a new polymer synthetic material product. On the basis of the first generation of lithium adsorbent has made great improvements, using new nanomaterials, composite pore-forming agent and special granulation process, the appearance of regular (spherical, the industry only), large specific surface area, high selectivity, the performance is significantly improved, the adsorption capacity is 50-60% higher than similar products under the same conditions, At the same time, the product has the advantages of convenient elution, high resolution rate, low dissolution loss rate and good durability, and the product performance has achieved a qualitative leap.
预处理(Pretreatment)
为确保将新的吸附剂中可能存在的微量低聚物和装填过程中带入的杂物清除干净,不影响产品的质量,新吸附剂正式使用前,应进行如下的预处理操作:
In order to ensure that the trace oligomers that may exist in the new adsorbent and the impurities brought in during the filling process are removed without affecting the quality of the product, the following pretreatment operations should be performed before the new adsorbent is officially used
(1)反洗:吸附剂装填完毕后,首先用清水进行反洗(或在吸附剂专用处理罐内),流速控制在7-10BV/h(床体积/小时),确保70%的反洗膨胀率,以去除杂质和微小的颗粒,直到反洗出水澄清止,耗时约0.5小时;
(1) Backwashing: After the adsorbent is flled, firstly perform backwashing with clean water (or in a special treatment tank for adsorbents), and the flow rate is controlled at 7-10BV/h (bed volume/hour) to ensure 70% backwashing Expansion rate to remove impurities and tiny particles until the backwash water is clarifed, which takes about 0.5 hours;
(2)浸泡:停止反洗,降低液位至吸附剂层高处上方20cm处,浸泡约2小时,使吸附剂充分落床;
(2) Soaking: Stop backwashing, lower the liquid level to 20cm above the highest point of the adsorbent layer, and soak for about 2 hours to make the adsorbent fully fall into the bed;
(3)正洗:最后用去离子水以3-4BV/h冲洗床层,耗时约3-5小时。
(3) Washing: finally rinse the bed with deionized water at 3-4BV/h, which takes about 3-5 hours.
单柱测试
吸附(Adsorption)
量取一定体积吸附剂V(mL)装入交换柱,取一-定体积卤水V0(L ) ,控制卤水( C0, mg/L)以0.5-3BV/h顺流经过吸附柱处理,收集流出液,监测吸附柱出口锂浓度,待吸附平衡后停止进料,计量吸附尾卤体积V1( L ) ,并检测尾卤混合锂浓度C1( mg/L)。
A certain volume of adsorbent V(mL) is loaded into the exchange column, a certain volume of brine V。(L) is taken, and the brine (C0, mg/L) is controlled to pass through the adsorption column in 0.5- 3BV/h downstream to collect the effluent, monitor the lithium concentration at the outlet of the adsorption column, and stop feeding after the adsorption equilibrium. The adsorption volume of the tail halide is V1 (L), and the concentration of the tail halide mixed lithium is detected C1 (mg/L).
置换(Replacement)
降低液位至吸附剂层高处齐平,用低钙镁锂卤水以2BV/h顺流置换残留卤水,耗时0.5小时,收集置换出卤水,计量体积V2 (L),并检测置换出卤水锂浓度C2 ( mg/L)。
Lower the liquid level to the highest level of the adsorbent layer, and replace the residual brine with low calcium magnesium lithium brine at 2BV/h downstream. It takes0.5 hours to collect and replace the brine, measure the volume V2 (L), and detect the concentration of lithium in the brine C2 (mg/L).
洗脱(Desorption)
用去离子水以2BV/h对吸附剂床进行顺流洗脱,耗时约5-10小时(建议每隔一小时取样监测
离子浓度),待洗脱液锂浓度低于设计要求,停止洗脱,计量洗脱液总体积V3 (L ) ,并检测洗脱液混合锂浓度C3( mg/L)。
Co-current elution of the adsorbent bed with deionized water at 2BV/h. It takes about 5- 10 hours (sampling every hour to monitor the lithium concentration is recommended).When the lithium concentration of the eluent was lower than the design requirements, the elution was stopped, the total volume of the eluent was measured at V3 (L), and the concentration of the eluent mixed lithium at C3 (mg/L) was detected.
重复吸附→置换- >洗脱步骤进行循环运行。
(Repeat the steps of adsorption, displacement,and elution for cyclic operation)
根据公式分别计算锂吸附容量、洗脱容量及收率:
锂吸附容量:Q? ( g/L) = [C0*Vo-C?*V?-C?*V?]/V
锂洗脱容量:Q? (g/L)= C?*V?/V
收率:R= Q?/Q?*100%
C )连续离交测试
吸附(Adsorption)
按照设计量装填吸附剂(单柱体积V,mL) , 设定吸附流量q1 ( mL/min)、切换时间t(min),控制卤水C0( mg/L)顺流吸附,收集尾卤检测浓度C1( mg/L)。
Adsorbent (single column volume V,mL) was filled according to the design quantity,adsorption flow rate q1 (mL/min) and switching time t(min) were set, brine C0(mg/L)was controlled for downstream adsorption, and tail halide concentration C1(mg/L) was collected for detection.
淋洗(wash)
设定淋洗流量q2 ( mL/min) ,用低钙镁卤水(洗脱前段)顺流淋洗吸附剂。
Set the leaching flow q2 (mL/min), and wash the adsorbent with low calcium magnesium brine (eluting front section) downstream.
■洗脱(Desorption)
设定洗脱流量q3 ( mL/min) ,洗脱前段时间t1 ( min), 洗脱后段时间t2 ( min), 用去离子水顺流洗脱吸附剂,分段收集洗脱液,洗脱前段(即低钙镁卤水)虽然锂高但钙镁含量不达标,用于淋洗工段对吸附剂淋洗,洗脱后段液体钙镁含量低且锂含量高为洗脱合格液,收集洗脱后段液体检测锂含量C2 ( mg/L)。
Set elution flow rate q3 (mL/min), time t1 (min) before elution, and time t2 (min)after elution. Eluent is eluted with deionized water downstream, and eluent is collected in stages. Although the elution stage (i.e. low calcium and magnesium brine) is high in lithium, the content of calcium and magnesium is not up to the standard, it is used to wash the adsorbent in the washing section. The liquid in the post-analytical section had low calcium and magnesium content and high lithium content. The liquid in the post-analytical section was collected for detection of lithium content C2 (mg/L).
■料顶水(Replacement water)
设定顶水流量q4( mL/min) ,用卤水逆流将吸附柱中水顶出。
Set the replacement water flow rate q4 (mL/min), and use brine countercurrent to push out the water in the adsorption column.
根据公式分别计算锂吸附容量、洗脱容量及收率:
锂吸附容量:Q1( g/L) =(C0-C1)*q1*t/1000V
锂洗脱容量:Q2 ( g/L) =C2*q3*t2/1000V
收率: R=Q2/Q1*100%
注意事项(Matters needing attention)
可能由于以下原因,会导致出水锂泄漏量增高和周期洗脱量减少的情况发生,用户可对照下面的情况寻找原因:
It may be due to the following reasons that the leakage of lithium in the effluent will increase and the amount of lithium in the elution will decrease. Usersdo the trouble shooting accordingly:
1、出水锂泄漏量增高或吸附容量偏低:
1. Lithium leakage in effluent increased or adsorption capacity was low:
(1)新树脂未按要求进行预处理,孔道中锂残留影响吸附效果;
(1) The new resin is not pretreated as required, and the lithium residue in the pore affects the adsorption effect;
(2)进、出水阀门串漏,进水漏入出水中,检查阀门的严密性;
(2) The inlet and outlet valves are leaking, and the inlet water leaks into the outlet water.check the tightness of the valves;
(3)吸附的流速过快,吸附剂的接触时间不够,交换不彻底,将吸附流速调到正常值;
(3) The adsorption flow rate is too fast, the contact time of the adsorbent with the brine solution is not enough, and the exchange is not complete. adjust the adsorption flow rate to the normal value;
(4)吸附剂有否漏空现象,控制进出水流量的平衡并保持吸附柱内的水位;
(4) Check whether the adsorbent column is empty, control the balance of incoming and outgoing water flow and keep the water level in the column;
2、周期洗脱量减少:
2. The amount of lithium in elution is reduced:
(1)水洗脱量不足,没有达到10-20BV的标准;
(1) The amount of water used to elute is insufficient and does not reach the standard of 10-20BV;
(2)洗脱用水水质太差或盐含量太高,应改善洗脱水的质量;
(2) The water quality of the elution water is too poor or the salt content is too high, and the quality of the water used should be improved;
(3)洗脱时间过短,锂来不及脱附,严控洗脱时间;
(3) The elution time is too short for the lithium to be desorbed, so the elution time needs to be strictly controlled;
(4)吸附剂结块,吸附效果不好,产生偏流,导致再生效果差。加强反洗效果,控制合适的反洗膨胀率和反洗时间。
(4) The adsorbent is agglomerated, and the adsorption effect is not good, resulting in bypass flow, resulting in poor regeneration effect. Strengthen the backwash effect, and control the appropriate backwash expansion rate and backwash time.
3、连续离交吸附量及收率过低
3. The continuous ionization adsorption capacity and yield are low
(1)吸附流量及时间设置不合理,流量过快、切换时间过短;
(1) The adsorption flow rate and time are not set properly, the flow rate is too fast and the switching time is too short;
(2)串并联方式不合理;
(2)The series-parallel mode is unreasonable;
(3)洗脱工段流量设置过快、前段时间过长、分配不合理。
(3) The eluting section flow is set too fast, the early period is too long, and the distribution is unreasonable.
包装(Packing)
25L编织涂膜袋,或1立方大包。
25L woven coating bag, or 1 cubic bag.