CN108219876A - 一种水煤浆添加剂及其制备方法 - Google Patents

一种水煤浆添加剂及其制备方法 Download PDF

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CN108219876A
CN108219876A CN201810246306.3A CN201810246306A CN108219876A CN 108219876 A CN108219876 A CN 108219876A CN 201810246306 A CN201810246306 A CN 201810246306A CN 108219876 A CN108219876 A CN 108219876A
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additive agent
slurries additive
polyethylene glycol
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carbonate
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朱桂生
王忠华
范俭青
符微微
胡宗贵
邵守言
刘玲
唐丽
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Jiangsu Thorpe Engineering Technology Co Ltd
JIANGSU SOPO (GROUP) CO Ltd
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Abstract

本发明属于化学领域，具体是指一种添加剂，更具体地是指一种水煤浆添加剂及其制备方法。本水煤浆添加剂，按质量比包括：丙烯酸1份，聚乙二醇丙烯酸酯3.5～4份，分散剂5份，过硫酸铵0.5份，碳酸盐0.05份。通过将丙烯酸、聚乙二醇、对二苯酚、浓硫酸混合物加热后恒温得到聚乙二醇丙烯酸酯；然后将丙烯酸、上述得到的聚乙二醇丙烯酸酯、苯乙烯基磺酸钠、过硫酸铵、碳酸盐加热恒温；冷却后，调节pH值得到水煤浆添加剂。本添加剂用量少，分散性好，可制得高浓度、流动性好、适合雾化的水煤浆。

Description

一种水煤浆添加剂及其制备方法
技术领域
本发明属于化学领域，具体是指一种添加剂，更具体地是指一种水煤浆添加剂及其制备方法。
背景技术
水煤浆是一种新型低污染代油燃料，通过物理方法使煤粉颗粒分散于水中从而转变成流体燃料。水煤浆技术作为一种经济、清洁、高效的煤炭利用技术，在我国得到大力发展，水煤浆作为一种液体燃料，具有石油一样的流动性和稳定性，可以像油一样泵送、雾化，储存和稳定燃烧，燃烧效率高达98％以上，且负荷调节范围大，并具有节能、污染排放低、储存运输方便等特点。可广泛应用于工业锅炉、电站锅炉、工业窑炉等作为燃料代煤，代油、代气燃烧，其应用范围可涉及宾馆、医院学校、工矿企业、电厂、集中供热站等需要燃料的各行各业，受到世界各国的广泛关注。
水煤浆技术是现阶段最适宜的代油、环保、节能技术、发展水煤浆技术，用煤制取清洁燃料是我国能源稳定发展战略和现实选择。
水煤浆添加剂是水煤浆生产过程中必需的重要助剂，在水煤浆原料成本中约占1.5％的添加剂构成水煤浆第二成本，所以添加剂对水煤浆的浓度、粘度、流动性、稳定性等关键指标都有直接影响。所以降低添加剂成本，掺杂量少、高浓度、高性能水煤浆的目标，是目前水煤浆制备技术的关键课题。而目前的技术都存在成本高，制备工艺复杂，性能低，掺杂量大等缺点。
发明内容
为了解决以上问题，本发明提供一种制备工艺简单，掺杂量少，高浓度的水煤浆添加剂。
为了实现以上目的，本发明的技术方案为：
一种水煤浆添加剂，按质量比包括：丙烯酸1份，聚乙二醇丙烯酸酯3.5～4份，分散剂5份，过硫酸铵0.5份，碳酸盐0.05份。
进一步地，所述碳酸盐为高岭土、碳酸钠、碳酸钾、碳酸钙中的一种或多种，可以使水煤浆粘度降低，而浓度提高。
进一步地，所述分散剂为羧甲基纤维素钠、丙烯酰胺、苯乙烯基磺酸钠中的一种或多种，使用具有强分散作用的强极性亲水基团，可以提高分散的效果。
所述一种水煤浆添加剂的制备方法，包括步骤：
(1)将丙烯酸、聚乙二醇、对二苯酚、浓硫酸混合物加热后恒温得到聚乙二醇丙烯酸酯；
(2)将丙烯酸、上述得到的聚乙二醇丙烯酸酯、苯乙烯基磺酸钠、过硫酸铵、碳酸盐加热恒温；
(3)冷却后，调节pH值得到水煤浆添加剂。
进一步地，步骤(1)中所述丙烯酸、聚乙二醇、对二苯酚、浓硫酸的质量比为3～4:1：0.045：0.05。
进一步地，步骤(2)中所述丙烯酸、聚乙二醇丙烯酸酯、苯乙烯基磺酸钠、过硫酸铵、碳酸盐的质量比为1:3.5～4:5:0.5：0.05。
进一步地，步骤(1)中加热恒温工艺为：加热至90～100℃，恒温反应2～3h。
进一步地，步骤(2)中加热恒温工艺为：加热至90℃-95℃，恒温反应3～4h。
进一步地，步骤(3)中调节pH值工艺为，使用25wt％NaOH调整pH值至9～10。
与现有技术相比，本发明得有益效果是：
1、用量少，对同一种煤种，制得相同浓度的水煤浆，本发明所制备的高效复配添加剂所需用量少。
2、分散性能好，相同条件，制得水煤浆表观粘度小。
3、可制得高浓度、流动性好、适合雾化的水煤浆。
4、稳定性好，能静置20日。
具体实施方式
以下通过实施例对发明进行进一步地说明。
一种水煤浆添加剂，按质量比包括：丙烯酸1份，聚乙二醇丙烯酸酯3.5～4份，分散剂5份，分散剂为羧甲基纤维素钠、丙烯酰胺、苯乙烯基磺酸钠中的一种或多种，过硫酸铵0.5份，碳酸盐0.05份，所述碳酸盐为高岭土、碳酸钠、碳酸钾、碳酸钙中的一种或多种。
一种水煤浆添加剂的制备方法，包括步骤：
(1)将质量比为3～4:1：0.045：0.05的丙烯酸、聚乙二醇、对二苯酚、浓硫酸混合物加热至90～100℃，恒温反应2～3h得到聚乙二醇丙烯酸酯；
(2)将质量比为1:3.5～4:5:0.5:0.05的丙烯酸、上述得到的聚乙二醇丙烯酸酯、苯乙烯基磺酸钠、过硫酸铵、碳酸盐加热至90℃-95℃，恒温反应3～4h；
(3)冷却后，使用25wt％NaOH调整pH值至9～10得到水煤浆添加剂。
将上述制备的水煤浆添加剂添加至水煤浆中，水煤浆使用的煤粉的粒度分布如下表：
表1
粒径 通过率％
小于8目 100
小于14目 98～100
小于40目 90～95
小于200目 60～70
小于325目 25～35
添加后，进行成浆性能测试：水煤浆浓度达到60％-65％,高效水煤浆添加剂用量0.15-0.3％时，在25℃，剪切率为100s-1水煤浆的粘度640-800mPa.s，可稳定20日以上，水煤浆呈屈服假塑性。而普通水煤浆浓度一般浓度为60％左右，水煤浆添加剂用量2.5-4％时,粘度为900-1500mPa.s。本发明得到的水煤浆的各项性能均大大高于普通水煤浆添加剂。
上述实施例仅仅是为清楚地说明本发明所作的举例，而并非是对本发明的实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而这些属于本发明的精神所引伸出的显而易见的变化或变动仍处于本发明的保护范围之中。

Claims (9)

1.一种水煤浆添加剂，其特征在于：按质量比包括：丙烯酸1份，聚乙二醇丙烯酸酯3.5～4份，分散剂5份，过硫酸铵0.5份，碳酸盐0.05份。
2.根据权利要求1所述的一种水煤浆添加剂，其特征在于：所述碳酸盐为高岭土、碳酸钠、碳酸钾、碳酸钙中的一种或多种。
3.根据权利要求1所述的一种水煤浆添加剂，其特征在于：所述分散剂为羧甲基纤维素钠、丙烯酰胺、苯乙烯基磺酸钠中的一种或多种。
4.根据权利要求1～3任一所述一种水煤浆添加剂的制备方法，其特征在于：包括步骤：
(1)将丙烯酸、聚乙二醇、对二苯酚、浓硫酸混合物加热后恒温得到聚乙二醇丙烯酸酯；
(2)将丙烯酸、上述得到的聚乙二醇丙烯酸酯、苯乙烯基磺酸钠、过硫酸铵、碳酸盐加热恒温；
(3)冷却后，调节pH值得到水煤浆添加剂。
5.根据权利要求4所述的一种水煤浆添加剂的制备方法，其特征在于：步骤(1)中所述丙烯酸、聚乙二醇、对二苯酚、浓硫酸的质量比为3～4:1：0.045：0.05。
6.根据权利要求4所述的一种水煤浆添加剂的制备方法，其特征在于：步骤(2)中所述丙烯酸、聚乙二醇丙烯酸酯、苯乙烯基磺酸钠、过硫酸铵、碳酸盐的质量比为1:3.5～4:5:0.5:0.05。
7.根据权利要求4所述的一种水煤浆添加剂的制备方法，其特征在于：步骤(1)中加热恒温工艺为：加热至90～100℃，恒温反应2～3h。
8.根据权利要求4所述的一种水煤浆添加剂的制备方法，其特征在于：步骤(2)中加热恒温工艺为：加热至90℃-95℃，恒温反应3～4h。
9.根据权利要求4所述的一种水煤浆添加剂的制备方法，其特征在于：步骤(3)中调节pH值工艺为，使用25wt％NaOH调整pH值至9～10。
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Citations (4)

* Cited by examiner, † Cited by third party
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