新型旋流场-颗粒床耦合分离设备静压分布

doi:10.11949/0438-1157.20191220

摘要/Abstract

摘要：

新型旋流场-颗粒床耦合分离设备将旋风分离器离心分离和移动床吸附/过滤分离有机结合，在一套设备中实现了两级净化过程，可适应较高的温度范围，为气体净化技术提供了一种新的思路。在固定床操作模式下，测量了耦合设备内部轴向、周向和径向的静压分布。实验结果表明，设备入口环形空间的静压分布可以确定设备内部旋流强度与入口气速之间存在直接联系；设备内部负压中心以及旋流场产生的影响在N8（H=2175 mm）测点以下不再明显；设备静压分布在周向上呈现明显的非对称分布，这也反映出设备内的气相流动在周向上存在不均匀分布的现象。

关键词: 气体净化, 旋风分离器, 颗粒床, 耦合, 静压分布

Abstract:

A coupled scheme of cyclone with built-in granular bed filter (C-CGBF), combining the centrifugation and filtration in one device, is designed for dry gas purification in a wide range of application temperature. The static pressure distribution in the C-CGBF is measured under the fixed bed operation regime. The results reveal that there is an apparent relation between the swirling intensity and the inlet gas velocity, according to the static pressure distribution in the annular space of the C-CGBF. The influence of the negative pressure core and the swirl field in the C-CGBF is no longer distinct below the measuring point N8 (H=2175 mm). The static pressure distribution of the device shows a clear asymmetric distribution in the circumferential direction, which also reflects the uneven distribution of the gas phase flow in the device in the circumferential direction.

Key words: gas purification, cyclone separator, granular bed filter, couple, static pressure distribution

中图分类号:

TQ 051.8

高思鸿, 刘堉学, 范怡平, 卢春喜. 新型旋流场-颗粒床耦合分离设备静压分布[J]. 化工学报, 2020, 71(2): 516-525.

Sihong GAO, Yuxue LIU, Yiping FAN, Chunxi LU. Static pressure distribution in coupled cyclone with built-ingranular bed filter[J]. CIESC Journal, 2020, 71(2): 516-525.

图/表 10

图1 实验装置流程

Fig.1 Schematic diagram of experimental setup

表1 C-CGBF分离设备主要结构尺寸

Table 1 Main geometrical dimensions of C-CGBF system

结构	尺寸/mm
旋风壳体
壳体内径	380
筒体高度	1600
锥体高度	880
内置颗粒床
料封高度	500
料腿内径	80
料腿高度	827

表2 设备入口气速及设备静压差

Table 2 Inlet gas velocities and pressure drop of equipment

$Q$ /(m³/h)	$u$ /(m/s)	$Δ P$ /Pa
400	4.27	264
600	6.41	533
800	8.54	1001
1000	10.68	1355
1200	12.81	1936
1400	14.95	2600

表2 设备入口气速及设备静压差

Table 2 Inlet gas velocities and pressure drop of equipment

$Q$ /(m³/h)	$u$ /(m/s)	$Δ P$ /Pa
400	4.27	264
600	6.41	533
800	8.54	1001
1000	10.68	1355
1200	12.81	1936
1400	14.95	2600

图2 设备测点布置图

Fig.2 Measurement points of equipment

图3 环形空间无量纲静压分布

Fig.3 Distribution of dimensionless static pressure at annular space

图4 分离空间及灰斗部分轴向静压分布（0°）

Fig.4 Axial static pressure distribution in separation space and ash hopper (0°)

图7 分离空间及灰斗部分轴向静压分布（270°）

Fig.7 Axial static pressure distribution in separation space and ash hopper (270°)

图5 分离空间及灰斗部分轴向静压分布（90°）

Fig.5 Axial static pressure distribution in separation space and ash hopper (90°)

图6 分离空间及灰斗部分轴向静压分布（180°）

Fig.6 Axial static pressure distribution in separation space and ash hopper (180°)

图8 不同气量下平均无量纲静压分布

Fig.8 Average dimensionless static pressure distribution under different inlet gas flow rate

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