CN115040970A - 一种飞灰绿色回收利用的处理方法 - Google Patents
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Abstract
本发明公开一种飞灰绿色回收利用的处理方法,步骤是:去除飞灰中的大颗粒杂质,对杂质进行沉降清除;对飞灰进行去酸操作并浸出金属;将飞灰处理废气导入净化室中,进行净化处理;对净化后的飞灰废气进行检测,达标排放。此种飞灰绿色回收利用的处理方法在去酸和浸出金属时,采用搅拌的方式进行混合,搅拌后的溶液较为均匀,与飞灰的混合程度高,还能提升飞灰中的金属浸出速率,进而降低飞灰回收利用的成本,设置除味杀菌的流程,对飞灰废气吸附处理后排放,不仅环境友好度获得提升,而且吸收性能好,恶臭气体的去除率高,实现飞灰废气的再利用排放,能大幅度减少其对环境的影响。
Description
技术领域
本发明属于化工飞灰回收技术领域,具体涉及一种飞灰绿色回收利用的处理方法。
背景技术
随着社会发展,人口不断向城市集中,生活垃圾成分日益复杂,土地资源空前紧张,生活垃圾处理变得尤为重要,现有的城市生活垃圾处理方式,通常是将垃圾运输到焚烧厂进行焚烧,垃圾焚烧产生的热量可用作生产生活能源,焚烧产生的固形物包括炉渣和飞灰,炉渣往往用作铺路的材料,而飞灰由于混杂有二噁英、硫化物、重金属等有毒有害物质,其处理方式主要有水泥固化、化学药剂稳定化、熔融固化等技术,而经过化学药剂稳定化处理后仍需要进行填埋,大量固化填埋处理的飞灰,会造成土地资源的流失和浪费,进而限制了各区域经济的发展,并且仍会对环境造成一定的污染。
发明内容
本发明的目的,在于提供一种飞灰绿色回收利用的处理方法,能够有效解决现有技术中存在的问题。
为了达成上述目的,本发明的解决方案是:
一种飞灰绿色回收利用的处理方法,包括如下步骤:
步骤S1、去除飞灰中的大颗粒杂质,对杂质进行沉降清除;
步骤S2、对飞灰进行去酸操作并浸出金属;
步骤S3、将飞灰处理废气导入净化室中,进行净化处理;
步骤S4、对净化后的飞灰废气进行检测,达标排放。
上述步骤S1还包括有,将飞灰通入旋风除尘装置中,对飞灰中的杂质进行沉降清除,再将飞灰通入工业废水中,二者协同混合,后续废水废气各自处理。
上述步骤S2还包括有,将处理后的飞灰烟气先导入前驱处理液中,进行去酸处理,再将去酸后的飞灰烟气输送至重金属螯合溶液中,将飞灰烟气中的铝离子浸出,捕集飞灰中的重金属,降低重金属活性。
上述前驱处理液由次氯酸钾和亚氯酸钾配制而成,次氯酸钾:亚氯酸钾=1:0.5,且前驱处理液需与水混合使用,前驱处理液与水的比例为1:1,重金属螯合溶液由HCL、磷酸钠和硫酸铝,按照1:0.8:0.9的比例配制而成。
飞灰去酸及浸出金属时,均需进行混合,去酸时混合设备的搅拌速率为100-120转/分钟,常温进行,搅拌8-10分钟,浸出金属时搅拌速率与飞灰去酸时一致,温度保持在40-50℃之间,搅拌时间根据实际浸出效果进行调整。
上述步骤S3还包括有,净化室中利用活性炭填充料进行异味的吸附,进行初步的除味,并配合UV光解除味进行更深层次的除味,再利用高温蒸汽的配合进行加热消毒。
上述活性炭填充料表层喷覆有醋酸液相溶液,吸收废气中残余的有机胺,辅助吸收废气异味。
采用上述方案后,本发明相对现有技术来说,取得的技术进步是:
(1)本发明提供一种飞灰绿色回收利用的处理方法,以废治废,通过工业废水与飞灰的协同混合,降低飞灰的反应温度,并去除飞灰中的大粒径杂质,提高后续飞灰的回收度,将飞灰中的杂质分不同利用方向进行回收,减少后期的填埋率,且回收的飞灰杂质经过再处理可以用作其他工程或工业用途,进一步增加飞灰回收利用的效益。
(2)本发明提供一种飞灰绿色回收利用的处理方法,去酸和浸出金属时,采用搅拌的方式进行混合,搅拌后的溶液较为均匀,与飞灰的混合程度高,还能提升飞灰中的金属浸出速率,进而降低飞灰回收利用的成本。
(3)本发明提供一种飞灰绿色回收利用的处理方法,设置除味杀菌的流程,对飞灰废气吸附处理后排放,不仅环境友好度获得提升,而且吸收性能好,恶臭气体的去除率高,实现飞灰废气的再利用排放,能大幅度减少其对环境的影响。
附图说明
图1是本发明的流程图。
具体实施方式
以下将结合附图,对本发明的技术方案及有益效果进行详细说明。
如图1所示,本发明提供了一种飞灰绿色回收利用的处理方法,由以下步骤组成:
S1、去除飞灰中的大颗粒杂质,对杂质进行沉降清除,将飞灰通入旋风除尘装置中,对飞灰中的杂质进行沉降清除,再将飞灰通入工业废水中,二者协同混合,后续废水废气各自处理,需注意高温飞灰烟气使得工业废水蒸发的蒸汽要保证密封液化的处理,避免泄露;
S2、对飞灰进行去酸操作并浸出金属,将处理后的飞灰烟气先导入前驱处理液中,进行去酸处理,再将去酸后的飞灰烟气输送至重金属螯合溶液中,将飞灰烟气中的铝离子浸出,捕集飞灰中的重金属,降低重金属活性;
S3、将飞灰处理废气导入净化室中,进行净化处理,净化室中利用活性炭填充料进行异味的吸附,进行初步的除味,并配合UV光解除味进行更深层次的除味,再利用高温蒸汽的配合进行加热消毒,活性炭填充料表层喷覆有醋酸液相溶液,吸收废气中残余的有机胺,辅助吸收废气异味,消毒完成后,净化后气体降温输送检测;
S4、对净化后的飞灰废气进行检测,达标排放。
进一步的是,前驱处理液由次氯酸钾和亚氯酸钾配制而成,次氯酸钾:亚氯酸钾=1:0.5,且前驱处理液需与水混合使用,前驱处理液与水的比例为1:1,重金属螯合溶液由HCL、磷酸钠和硫酸铝,按照1:0.8:0.9的比例配制而成,飞灰去酸及浸出金属时,均需进行混合,去酸时混合设备的搅拌速率为100-120转/分钟,常温进行,搅拌8-10分钟,浸出金属时搅拌速率与飞灰去酸时一致,温度保持在40-50℃之间,搅拌时间根据实际浸出效果进行调整,搅拌后的溶液较为均匀,与飞灰的混合程度高,还能提升飞灰中的金属浸出速率。
下面具体说一下该飞灰绿色回收利用的处理方法的工作原理。
如图1所示,首先将飞灰通入旋风除尘装置中,对飞灰中的杂质进行沉降清除,再将飞灰通入工业废水中,二者协同混合,对飞灰进行降温,后续废水废气各自处理,但需注意高温飞灰烟气使得工业废水蒸发的蒸汽要保证密封液化的处理,避免泄露,然后将处理后的飞灰烟气先导入由次氯酸钾和亚氯酸钾配制而成的前驱处理液中,进行去酸处理,去酸时利用混合设备进行混合,混合设备的搅拌速率为100-120转/分钟,并在常温下进行反应,搅拌8-10分钟,再将去酸后的飞灰烟气输送至由HCL、磷酸钠和硫酸铝,按照1:0.8:0.9的比例配制而成的重金属螯合溶液中,在搅拌速率为100-120转/分钟,温度保持40-50℃之间的条件下进行反应,搅拌时间根据实际浸出效果进行调整,将飞灰烟气中的铝离子浸出,捕集飞灰中的重金属,降低重金属活性,接下来,将飞灰处理废气导入净化室中,进行净化处理,净化室中利用活性炭填充料进行异味的吸附,进行初步的除味,并配合UV光解除味进行更深层次的除味,再利用高温蒸汽的配合进行加热消毒,活性炭填充料表层喷覆有醋酸液相溶液,吸收废气中残余的有机胺,辅助吸收废气异味,消毒完成后,净化后气体降温输送检测,检测完成后,达标排放即可。
上文一般性的对本发明做了详尽的描述,但在本发明基础上,可以对之做一些修改或改进,这对于技术领域的一般技术人员是显而易见的。因此,在不脱离本发明思想精神的修改或改进,均在本发明的保护范围之内。
Claims (7)
1.一种飞灰绿色回收利用的处理方法,其特征在于包括如下步骤:
步骤S1、去除飞灰中的大颗粒杂质,对杂质进行沉降清除;
步骤S2、对飞灰进行去酸操作并浸出金属;
步骤S3、将飞灰处理废气导入净化室中,进行净化处理;
步骤S4、对净化后的飞灰废气进行检测,达标排放。
2.如权利要求1所述的一种飞灰绿色回收利用的处理方法,其特征在于:所述步骤S1还包括有,将飞灰通入旋风除尘装置中,对飞灰中的杂质进行沉降清除,再将飞灰通入工业废水中,二者协同混合,后续废水废气各自处理。
3.如权利要求1所述的一种飞灰绿色回收利用的处理方法,其特征在于:所述步骤S2还包括有,将处理后的飞灰烟气先导入前驱处理液中,进行去酸处理,再将去酸后的飞灰烟气输送至重金属螯合溶液中,将飞灰烟气中的铝离子浸出,捕集飞灰中的重金属,降低重金属活性。
4.如权利要求3所述的一种飞灰绿色回收利用的处理方法,其特征在于:所述前驱处理液由次氯酸钾和亚氯酸钾配制而成,次氯酸钾:亚氯酸钾=1:0.5,且前驱处理液需与水混合使用,前驱处理液与水的比例为1:1,重金属螯合溶液由HCL、磷酸钠和硫酸铝,按照1:0.8:0.9的比例配制而成。
5.如权利要求3所述的一种飞灰绿色回收利用的处理方法,其特征在于:飞灰去酸及浸出金属时,均需进行混合,去酸时混合设备的搅拌速率为100-120转/分钟,常温进行,搅拌8-10分钟,浸出金属时搅拌速率与飞灰去酸时一致,温度保持在40-50℃之间,搅拌时间根据实际浸出效果进行调整。
6.如权利要求1所述的一种飞灰绿色回收利用的处理方法,其特征在于:所述步骤S3还包括有,净化室中利用活性炭填充料进行异味的吸附,进行初步的除味,并配合UV光解除味进行更深层次的除味,再利用高温蒸汽的配合进行加热消毒。
7.如权利要求6所述的一种飞灰绿色回收利用的处理方法,其特征在于:所述活性炭填充料表层喷覆有醋酸液相溶液,吸收废气中残余的有机胺,辅助吸收废气异味。
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