SU814385A1 - Contact device for mass exchange apparatus - Google Patents

Description

(54) CONTACT DEVICE FOR MASS-EXCHANGE EQUIPMENT

the activity of mass transfer processes occurring in the known apparatus.

The aim of the invention is to intensify mass transfer by increasing the contact surface.

The goal is achieved by the fact that at least one annular partition is installed eccentric with respect to the central axis of the device.

The eccentric arrangement of the annular partitions leads to the fact that interscapular channels of the same interfacial space take the form of confused-diffuser curvilinear channels of different sections. As a result, the interacting flows move in channels with different speeds, their time in channels is unequal.

At the exit of the device, due to the different departure speeds from neighboring interscapular channels, intensive mixing occurs not only between oncoming flows departing from C-4 inter-ring spaces, but also between flows emitted from adjacent inter-shoulder channels of the same inter-ring space. This leads to an increase in the contact surface, and thus, the process of mass transfer is intensified,

Fig, 1 shows a device, front view; Fig 2 is a top view.

The contact device contains a cluster 1, the wrapper 2, made in the form of interconnected cylindrical surfaces that are convex to the central axis of the device. Between the housing and fairing eccentric with respect to the central axis of the device are placed annular partitions 3, the number of which can be from one to two or three or more. Radial blades 4 are installed in inter-ring spaces at an angle opposite to the angle of inclination of the blades in the adjacent inter-ring space. At least one annular partition 3 is set eccentrically with respect to the central axis of the device.

The device works in the following way.

Gas-liquid flow enters the housing 1 of the contact device. Due to the eccentric placement of the ring partitions, 3 inter-blade channels in the same inter-ring space have a variable cross-section. For example (see FIG. 2), in the outer annular space one of the channels formed by the front blades has the shape of a confuser, since the gap between the rings at the entrance is larger than the gap at the exit and one of the channels formed by the rear blades has the shape of the diffuser, since the gap between the rings at the entrance is smaller than the gap at the exit. Therefore, the flow in the channel in the form of a confuser is accelerated, and the flow in the channel in the form of a diffuser is slow. As a result, the residence time of particles in these channels and their speed at the exit from the channels will be different.

The greater the eccentricity of the annular partitions, the greater the relative velocities of particles escaping from the channels and the more efficient the mass transfer between the flows of the same inter-ring space.

Due to the opposite angles of inclination of the blades in adjacent annular spaces, the threads are twisted in opposite directions. therefore

0 high relative velocities arise not only between flows of adjacent mechslopast channels, but also between oncoming flows of adjacent inter-ring spaces. So

5 as the particle trajectories at the exit of the device coincide with the tangents to the surfaces streamlined by them, intensive mixing occurs not only in the peripheral zone, but also throughout the device section, because fairing 2 is formed by surfaces that are convex to the center of the device.

Thus, the main technical and economic advantages of the proposed device in comparison with the known one is the intensification of the mass transfer process due to the intensive mixing of the contacting phases and the increase in the surface.

 the invention

A contact device for mass transfer apparatus, comprising a housing,

a fairing made in the form of interconnected cylindrical surfaces convex to the central axis of the device, annular partitions and. radioshnye blades,

Q installed at opposite tilt angles in adjacent inter-ring spaces, characterized in THAT} in order to intensify mass transfer by increasing the contact surface at least

5 least one annular partition

installed eccentric with respect to the central axis of the device.

Sources of information 0 taken into account in the examination

1. USSR author's certificate number 476005, cl. B 01 D 3/30, 1974.

2. USSR author's certificate number 683762, cl. B 01 O 3/30, 1978

5 (prototype).

Claims (1)

Claim Contact device for mass transfer apparatus, comprising a housing, a fairing made in the form of interconnected cylindrical surfaces convex to the central axis of the device, annular partitions and. radial blades mounted under opposite angles in adjacent inter-ring spaces different in I that, in order to intensify the mass transfer by increasing the contact surface of at least one annular partition installed eccentrically with respect to the central axis ^- the device.