RU88981U1 - VALVE-VALVE PLATE OF HEAT AND MASS EXCHANGE UNIT - Google Patents

Abstract

1. The sieve-valve plate of the heat and mass transfer apparatus, containing distribution and overflow slats, receiving and drain pockets and a horizontal perforated sheet on which perforated valves with different-sized legs are installed, the free section of the valves is less than the free section of the fabric, characterized in that some of the valves located near the extreme points of the distribution plate, made deployed relative to the other valves and oriented with short legs to the central part of the plate cloth and. ! 2. The sieve-valve plate of the heat and mass transfer apparatus according to claim 1, characterized in that on the plate of the plate in the region of the extreme points of the distribution bar between the valves, guide plates are installed.

Description

The utility model relates to disk-type contact devices and can be used for heat and mass transfer processes in the oil, gas, and chemical industries.

Known valve plate (copyright certificate No. 424574, IPC V01D, publ. 04.25.044, OB No. 15) containing a base with trapezoidal valves installed on it, while the valves face a smaller base towards the drain partition.

A common feature of the known plates with the proposed is the presence of the canvas with valves installed on it.

A disadvantage of the known device is the ineffective acceleration of the fluid on the plate, which slightly reduces the liquid gradient and practically does not affect the efficiency of heat and mass transfer and hydraulic resistance. This is due to the fact that, due to the design of the known plate, the component of the velocity of the gas exiting from under the valve toward the fluid flow is small, which does not provide effective acceleration of the fluid.

The closest in technical essence and the achieved result to the claimed utility model is a sieve-valve plate (utility model certificate No. 10591, IPC ⁶ V01D 3/22, 3/30, publ. 16.08.1999, OB No. 8), consisting of horizontal perforated fabric, on which perforated valves with different-sized legs are installed, while the valve openings are offset relative to the web openings, and the diameter of the valve openings is smaller than the diameter of the plate web openings.

Common features of the known and proposed devices are:

- distribution and overflow bars;

- front and drain pockets;

- horizontal perforated canvas;

- perforated valves mounted on the canvas with different-sized legs;

- the free section of the valves is less than the free section of the web.

A disadvantage of the known device is the poor operation of the side segments of the plate cloth. This is due to the presence of stagnant zones on the near-wall sections of the contact sheet plate, on which there is no active mixing of the liquid and no displacement of the liquid phase from these sections to the drain plate, which reduces the overall efficiency of heat and mass transfer.

The technical problem is to achieve high efficiency of heat and mass transfer due to the uniform distribution of liquid on the plate plate.

The problem is achieved in that in the sieve-valve plate of the heat and mass transfer apparatus, containing distribution and overflow slats, receiving and drain pockets and a horizontal perforated sheet on which perforated valves with different legs are installed, while the free section of the valves is smaller than the free section of the sheet, is new the fact that some of the valves located near the extreme points of the distribution strip are made deployed relative to the other valves and are oriented towards otkimi legs in the central portion of the web plate.

In addition, on the plate of the plate in the region of the extreme points of the distribution bar between the valves installed guide plates.

The execution of the part of the valves located near the extreme points of the distribution plate, deployed relative to the other valves and oriented with short legs in the central part of the plate cloth, allows you to evenly distribute the liquid on the plate by increasing the flow rate of the liquid phase and its level on the side segments, increasing the concentration gradient of diffusing components through the heat and mass transfer surface created during sparging, which increases the efficiency of the plate.

The installation of the guide plates on the plate cloth also allows you to evenly distribute the fluid flow over the entire area of the contact sheet.

Figure 1 presents a General view of the sieve-valve plate of the heat-mass transfer apparatus, with a maximum gas load (steam), figure 2 is a top view of the plate.

The sieve-valve plate contains distribution 1 and overflow 2 slats, receiving 3 and drain 4 pockets and a horizontal perforated sheet 5. Perforated valves 6 with different legs are installed on the sheet 5: long legs 7 and short legs 8. The free section of the valves 6 is less than the free section canvas 5. Long legs 7 of the valve 6 are oriented towards the overflow bar 2, and the short legs 8 are oriented towards the distribution bar 1. The canvas 5 is adjacent to the body 9 of the heat and mass transfer apparatus from two sides one, forming between the distribution plate 1 and the device body, on the one hand, and the overflow plate 2 and the device body, on the other hand, side (wall) segments 10, on which perforated valves are also placed 6. Part of the valves 11 located near the extreme points distribution strips 1, are deployed relative to the rest of the valves 6 and are oriented by short legs 8 to the central part of the plate 5 of the plate. On the plate 5 of the plate in the region of the extreme points of the distribution bar 1 between the valves 6 and 11 are installed guide plates 12.

The plate works as follows. The liquid from the receiving pocket 3 enters the canvas 5 plates. Gas passes through the holes in the web 5, then passes through a liquid layer, resulting in a bubble layer on the contact web 5. Then the gas goes to the overlying plate, and the liquid enters the drain pocket 4. At the same time, the gas at the outlet of the valves 6 accelerates the flow of fluid towards the overflow bar 2, and the valves 11 located near the extreme points of the distribution bar 1, deployed relative to the other valves 6 and oriented by short legs 8 to the central part of the plate 5 of the plate, accelerate and direct part of the liquid in the direction of the lateral (parietal) segments 10 of the contact sheet 5, thereby improving the work of the parietal sections of the contact sheet and stagnant zones are eliminated. In this case, the guide plates 12 can be used for additional liquid distribution over the web, especially in the case of low gas loads, when the kinetic energy of the gas is small for effective acceleration and direction of the fluid on the web. The fluid flow, entering the plate 5 of the plate, meets resistance in the form of guide plates 12, which do not allow all the liquid to pass along a straight path towards the overflow bar 2 and direct part of the liquid towards the side (wall) segments 10.

Claims (2)

1. The sieve-valve plate of the heat and mass transfer apparatus, containing distribution and overflow slats, receiving and drain pockets and a horizontal perforated sheet on which perforated valves with different-sized legs are installed, the free section of the valves is less than the free section of the fabric, characterized in that some of the valves located near the extreme points of the distribution plate, made deployed relative to the other valves and oriented with short legs to the central part of the plate cloth and. 2. The sieve-valve plate of the heat and mass transfer apparatus according to claim 1, characterized in that on the plate blade in the region of the extreme points of the distribution bar between the valves, guide plates are installed.