CN1006409B - 从热尘气流中抽检气体取样器 - Google Patents

从热尘气流中抽检气体取样器

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Publication number
CN1006409B
CN1006409B CN86104712A CN86104712A CN1006409B CN 1006409 B CN1006409 B CN 1006409B CN 86104712 A CN86104712 A CN 86104712A CN 86104712 A CN86104712 A CN 86104712A CN 1006409 B CN1006409 B CN 1006409B
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China
Prior art keywords
sampler
filtrator
pipeline
gas
air intake
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Expired
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CN86104712A
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CN86104712A (zh
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吉尤拉·扎罗利克斯
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Smiden
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Smiden
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Publication of CN86104712A publication Critical patent/CN86104712A/zh
Publication of CN1006409B publication Critical patent/CN1006409B/zh
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2247—Sampling from a flowing stream of gas
    • G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G01N1/2205—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with filters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2247—Sampling from a flowing stream of gas
    • G01N2001/227—Sampling from a flowing stream of gas separating gas from solid, e.g. filter
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N2001/2282—Devices for withdrawing samples in the gaseous state with cooling means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T436/00—Chemistry: analytical and immunological testing
    • Y10T436/25—Chemistry: analytical and immunological testing including sample preparation
    • Y10T436/25875—Gaseous sample or with change of physical state

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

从含尘气中抽取气样的取样器有带冷却套(11)的管道(2)，它通到带过滤器(5)的过滤室(4)中。管道进口(1)是收缩形的以减低气体流速，并因此降低携带粉尘量。

Description

本发明涉及一种从热尘气流中抽检气体的取样器，例如从焙烧炉的气流抽取气样。
这种取样器为承受热气流，必须被冷却，所抽检的样气也须过滤来除去吸进样气中的灰尘。由于几乎不可能有一种能长时间承受热气流的过滤器，所以过滤器是这样置放，即样气在冷却之后才接触过滤器。
再有，还必须降低样气中的含尘量来防止过滤器很快被堵塞。
根据DE-A-3327180号专利，具有冷却介质可以通过的冷却罩，以及取样器一端有进气口的取样器可达到上述要求。当把取样器装进气流中时，取样器可以抽取样气，进气口开在取样器的背风面。
涉及到我们英国专利第8517549中描述的快速气体监视仪，由于是用泵把样气从取样器中吸进分析站里，所以取样器中冷却的气体以很快的速度通过取样器和相连的管道。而在取样器的进气口处，未能冷却的样气体积大，所以取样器进气口处气体速度极快，使得带走粉尘量增大。
因此，本发明的目的是提供一种进气口处气体速度低的取样器，根据本发明的取样器可以达到这一目的，它有带冷却装置的管路，从进气口处通到带过滤器的过滤室，其特征是，进气口在进入管路方向上是收缩形的。
这种收缩形，最好是截头圆锥形的进气口，可以降低气体中的 夹带粉尘量，其中，进气口前部的面积越大，气体速度就越低，因此带走粉尘量也就越小。
在收缩形进气口中，气体加速到必要的高速度，以防止在通向过滤室管道中的带走粉尘沉降在管道的出口端。
管道与过滤室间的转换导管可以是扩展形的，最好是截头圆锥形的，当与取样气流反向间歇地通入压缩空气脉冲来清理时，可以提高过滤器和取样管的除尘效率。
为把取样器的反应时间缩到最短，过滤室的形状可以与所选的市场上的标准过滤器外形大体相一致，在过滤器与过滤室间只留很小的间隙。再有，如果过滤器在出口处有一个空腔，那么可以用一个构件大致填满这个空腔，这个构件是取样器壳体上的一部分。
这个构件有一个通道，该通道至少在面对过滤器内端的一头是喷嘴状。这个通道用来把压缩空气通入取样器以清理过滤器。并且这个通道还可以用作取样器的出气口。然而，也可选择另一个通到过滤器出口处的管道作为出气口。
取样器的新结构可以仅使用金属构件，因此克服陶瓷与金属共用时不同热膨胀率的缺陷。
下面结合附图详细说明本发明，附图示出了根据本发明的取样器的一个实施例的轴向剖视图。
其中，取样器基本上是一个整体，尽管实际上它可以是由若干构件组成的。
取样器有收缩形锥形进气口1，从口1通出管道2经扩展的锥形转换管3到达过滤室4，在过滤室4中装有烧结金属结构的过滤器5。
构成取样器外壳一部分的一个构件6填满了过滤器5的空腔7的 大部分。构件6有一个轴向出口通道8从过滤器的空腔中通出。通道8既可以用作出气道，又可以为清洗目的把加压空气通入过滤器5，因此，在通向空腔7的开口处可以有喷嘴9。
因为取样器的目的是从气流中抽取热气，所以至少伸进热气流中的那部分应能被冷却。再者，被吸取的样气应在接触到过滤器之前被冷却。冷却是通过经管子10向围绕管道2的圆柱冷却套加注冷却液来完成的。冷却液从冷却套11通过开口12，进入圆柱冷却管道13，冷却管道13靠近取样器发热部分的外圆柱表面，管道13中的冷却液再通过一个管子14排出取样器。
尽管应冷却样气来保护过滤器5，但是却不能冷却到它的露点以下，而在管道2中的冷凝有损于取样器的功能。为避免管道2中的冷凝，管内冷却液可以用已知的方法在加注到冷却套11内之前，将其予热到高于进入管道2内样气的露点的温度。

Claims (7)

1、一种从热尘气中抽取气样的取样器，取样器有带冷却装置(10-14)的管道(2)，管道(2)从进气口(1)通到带有过滤器(5)的过滤室(4)，其特征是，进气口(1)在进入管道的方向上是收缩形的。
2、根据权利要求1所述的取样器，其特征在于取样器上的进气口（1）是截头圆锥形。
3、根据权利要求1或2所述的取样器，其特征在于，取样器上介于管道（2）和过滤室（4）间的转换管（3）在进入过滤室方向上是扩展形的。
4、根据权利要求3所述的取样器，其特征在于转换管（3）是截头圆锥形的。
5、根据任何一项前述权利要求中的取样器，其特征在于取样器的过滤器（5）在其出口处有一个空腔（7）和一个构件（6），构件（6）固定在取样器壳体上，基本上填满过滤器的空腔。
6、根据权利要求5所述的取样器，其特征在于，取样器的构件（6）有一个通道（8），它至少在面对过滤器（5）的空腔（7）的一端有一喷嘴。
7、根据任何一项前述的权利要求中的取样器，其特征在于取样器的所有部件都是金属件。
CN86104712A 1985-08-13 1986-07-08 从热尘气流中抽检气体取样器 Expired CN1006409B (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8520273 1985-08-13
GB858520273A GB8520273D0 (en) 1985-08-13 1985-08-13 Extracting sample from gas flow

Publications (2)

Publication Number Publication Date
CN86104712A CN86104712A (zh) 1987-02-11
CN1006409B true CN1006409B (zh) 1990-01-10

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US (1) US4772454A (zh)
EP (1) EP0219188B1 (zh)
JP (1) JPS6238342A (zh)
CN (1) CN1006409B (zh)
BR (1) BR8603843A (zh)
DE (1) DE3665771D1 (zh)
DK (1) DK162800C (zh)
GB (1) GB8520273D0 (zh)
IN (1) IN167343B (zh)
NO (1) NO170906C (zh)

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Also Published As

Publication number Publication date
NO170906C (no) 1992-12-23
GB8520273D0 (en) 1985-09-18
DE3665771D1 (en) 1989-10-26
JPS6238342A (ja) 1987-02-19
CN86104712A (zh) 1987-02-11
EP0219188B1 (en) 1989-09-20
DK311886A (da) 1987-02-14
IN167343B (zh) 1990-10-13
NO862591D0 (no) 1986-06-26
NO170906B (no) 1992-09-14
DK311886D0 (da) 1986-07-01
DK162800C (da) 1992-04-27
EP0219188A1 (en) 1987-04-22
BR8603843A (pt) 1987-03-24
US4772454A (en) 1988-09-20
DK162800B (da) 1991-12-09
NO862591L (no) 1987-02-16

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