CN105784767A - 一种高挥发份煤的发热量测定方法 - Google Patents

一种高挥发份煤的发热量测定方法 Download PDF

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CN105784767A
CN105784767A CN201610310943.3A CN201610310943A CN105784767A CN 105784767 A CN105784767 A CN 105784767A CN 201610310943 A CN201610310943 A CN 201610310943A CN 105784767 A CN105784767 A CN 105784767A
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coal
value
measuring
fugitive constituent
oxygen bomb
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张朋云
王刚
随月斯
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Bengang Steel Plates Co Ltd
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Bengang Steel Plates Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00Investigating or analyzing materials by the use of thermal means
    • G01N25/20Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
    • G01N25/22Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
    • G01N25/26Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures using combustion with oxygen under pressure, e.g. in bomb calorimeter

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Abstract

一种高挥发份煤的发热量测定方法,主要是解决现有煤发热量测定中充氧压力不准确造成试样在氧弹内点火燃烧时发生喷溅现象使测试结果偏低的问题。本发明提供一种高挥发份煤的发热量测定方法,具体步骤为:首先测定出煤的挥发份的数值,根据挥发份的数值来控制充氧压力的大小,再检测发热量的准确数值。本发明测定方法使变质程度低的褐煤,气煤、气肥煤等挥发份大的煤可以准确及时的检测发热量。

Description

一种高挥发份煤的发热量测定方法
技术领域
本发明涉及一种高挥发份煤的发热量测定方法,属于煤生产技术领域。
背景技术
发热量是煤质分析最重要的项目之一,是判断动力燃料经济价值的主要指标,也是煤炭贸易中主要的计价依据。它的测量原理是:在氧弹量热计中测定煤的发热量。即分析试样在充有过量氧气的氧弹内燃烧,氧弹量热计的热容量通过燃烧一定量的基准量热物苯甲酸来确定,根据试样点燃前后量热系统产生的温升,并对点火热等附加热进行校正后即可求出试样的弹筒发热量。从弹筒发热量中扣除硝酸生成热和硫酸校正热(硫酸与二氧化硫生成热之差)后即得高位发热量值;从高位发热量中扣除水(煤中原有的水和煤中氢生成的水)的气化潜热后得到低位发热量。它的适用范围包括泥炭、褐煤、烟煤、无烟煤、焦炭、碳质页岩、固体矿物燃料、水煤浆等。
煤的发热量测定中充氧压力:往按照规定条件下装入试样的氧弹中缓缓充入氧气,直至氧弹内达到规定的压力。
现有国家标准GB/T213-2008《煤的发热量测定方法》中关于充氧压力的规定是:往氧弹中缓缓充入氧气,直至压力到(2.8~3.0)MPa”。
对燃烧时易于飞溅的试样(高挥发份),充氧压力仍为(2.8~3.0)MPa时,按照国标规定的方法进行操作,有时也会造成试样在氧弹内点火燃烧时发生喷溅现象,使测试结果偏低。
发明内容
本发明所要解决的技术问题在于提供一种高挥发份煤的发热量测定方法。本发明的测定方法使变质程度低的褐煤,气煤、气肥煤等挥发份大的煤可以准确及时的检测发热量。
为了实现上述目的,本发明采用的技术方案如下:
一种高挥发份煤的发热量测定方法,包括以下步骤:
首先测定出煤的挥发份的数值,根据挥发份的数值来控制充氧压力的大小,再检测发热量的准确数值,其中,挥发份为28%~37%的煤,在氧弹中充氧压力为2.5~2.8MPa;挥发份为38%~45%的煤,在氧弹中充氧压力为2.0~2.2Pa;挥发份大于45%的煤,在氧弹中充氧压力为1.8~2.0MPa。
本发明的有益效果:
本发明通过针对种类不同的试样,对氧弹内的充氧压力界定出具体的范围,避免了按照国标规定的方法进行操作,有时也会造成挥发份高的试样在氧弹内点火燃烧时发生喷溅现象,使测试结果偏低。使变质程度低的褐煤,气煤、气肥煤等挥发份大的煤可以准确及时的检测发热量。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白,以下结合实施例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
实施例1
一种高挥发份煤的发热量测定方法,包括以下步骤:
首先测定出煤的挥发份的数值为28%,在氧弹中充氧压力为2.5MPa,再检测发热量的准确数值。
其中,挥发份为28%~37%的煤;挥发份为38%~45%的煤,在氧弹中充氧压力为2.0~2.2Pa;挥发份大于45%的煤,在氧弹中充氧压力为1.8~2.0MPa。
实施例2
一种高挥发份煤的发热量测定方法,包括以下步骤:
首先测定出煤的挥发份的数值为37%,在氧弹中充氧压力为2.8MPa,再检测发热量的准确数值。
实施例3
一种高挥发份煤的发热量测定方法,包括以下步骤:
首先测定出煤的挥发份的数值为32%,在氧弹中充氧压力为2.7MPa,再检测发热量的准确数值。
实施例4
一种高挥发份煤的发热量测定方法,包括以下步骤:
首先测定出煤的挥发份的数值为38%,在氧弹中充氧压力为2.0MPa,再检测发热量的准确数值。
实施例5
一种高挥发份煤的发热量测定方法,包括以下步骤:
首先测定出煤的挥发份的数值为45%,在氧弹中充氧压力为2.2MPa,再检测发热量的准确数值。
实施例6
一种高挥发份煤的发热量测定方法,包括以下步骤:
首先测定出煤的挥发份的数值为40%,在氧弹中充氧压力为2.1MPa,再检测发热量的准确数值。
实施例7
一种高挥发份煤的发热量测定方法,包括以下步骤:
首先测定出煤的挥发份的数值为47%,在氧弹中充氧压力为1.8MPa,再检测发热量的准确数值。
实施例8
一种高挥发份煤的发热量测定方法,包括以下步骤:
首先测定出煤的挥发份的数值为50%,在氧弹中充氧压力为2.0MPa,再检测发热量的准确数值。

Claims (1)

1.一种高挥发份煤的发热量测定方法,包括以下步骤:
首先测定出煤的挥发份的数值,根据挥发份的数值来控制充氧压力的大小,再检测发热量的准确数值,其中,挥发份为28%~37%的煤,在氧弹中充氧压力为2.5~2.8MPa;挥发份为38%~45%的煤,在氧弹中充氧压力为2.0~2.2Pa;挥发份大于45%的煤,在氧弹中充氧压力为1.8~2.0MPa。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110186744A (zh) * 2019-04-12 2019-08-30 武汉钢铁有限公司 一种烧结固体燃料发热值在线快速检测方法及处理装置

Citations (3)

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Publication number Priority date Publication date Assignee Title
JPH0395449A (ja) * 1989-09-08 1991-04-19 Chubu Electric Power Co Inc 石炭の発熱量測定方法
CN1415955A (zh) * 2002-11-06 2003-05-07 张洪 一种利用氧弹法测定煤炭燃烧特性的方法
CN103063539A (zh) * 2012-12-26 2013-04-24 合肥立华畜禽有限公司 烟煤能量的测定方法

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
JPH0395449A (ja) * 1989-09-08 1991-04-19 Chubu Electric Power Co Inc 石炭の発熱量測定方法
CN1415955A (zh) * 2002-11-06 2003-05-07 张洪 一种利用氧弹法测定煤炭燃烧特性的方法
CN103063539A (zh) * 2012-12-26 2013-04-24 合肥立华畜禽有限公司 烟煤能量的测定方法

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110186744A (zh) * 2019-04-12 2019-08-30 武汉钢铁有限公司 一种烧结固体燃料发热值在线快速检测方法及处理装置
CN110186744B (zh) * 2019-04-12 2020-09-15 武汉钢铁有限公司 一种烧结固体燃料发热值在线快速检测方法及处理装置

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Application publication date: 20160720