CN2308428Y - Float valve column plate with improved way of gas/liquid contact - Google Patents

Abstract

The utility model relates to a valve tray. The utility model is characterized in that a liquid inlet on the valve tray is provided with float valves which have the functions of guiding flow; in the bow-shaped zone of the valve tray, the direction of the long shaft of each flow guiding float valve and the direction of the main flow of liquid are arranged in an alpha angle state, and each alpha angle is within 0 DEG to 80 DEG; in other zones, the flow guiding float valves and common float valves are arranged in an alternating arrangement state; an overflow bam for a bow-shaped downcomer has a flanging-shaped structure. The utility model which is helpful to guide the flow of the liquid and the even distribution of the liquid eliminates a bow-shaped stagnation zone, reduces the head drop of liquid level of the valve tray, and improves hydromechanics performance and mass transfer performance. The utility model is suitable for a tray for a large-scale tower and for the design for a tray with a long flow path.

Description

Has the valve plate that improves the gas-liquid way of contact

The utility model valve plate belongs to the plate column parts, is a kind of New Valve Trays that is widely used in the various fractionating columns of industry such as oil refining, chemical industry, petrochemical industry and light industry, absorption tower, desorber, scrubbing tower, the stripper.International Patent classificating number is B01D3/18.

Valve plate is the column plate pattern that is most widely used, the float valve aligning method of prior art is: the float valve of same valve type such as F1 float valve, bar valve etc. are evenly distributed on column plate, rectangular valve is each its long axis direction of zone or arranged vertical parallel with the liquid main flow direction on column plate, the weak point of current spread pattern is the liquid impetus on the column plate very little, gradient of liquid level is bigger on the column plate, and in the arch area of column plate, liquid almost remains in a standstill, thereby cause the liquid residence time inequality, produce liquid dispersion.For Large Towers, gradient of liquid level is bigger on the column plate, and back-mixing is even more serious, and mass-transfer efficiency is lower.

The purpose of this utility model is: for the shortcoming that gradient of liquid level is big and arch area liquid remains in a standstill on the liquid flow weak effect that overcomes existing valve plate, the column plate, the utility model provide a kind of on column plate zones of different adopt the arrangement form of different valve types and different orientations, thereby gas-liquid contact effect is improved, gradient of liquid level reduces on the column plate, and liquid residence time distributes and improves.

The utility model valve plate has following feature: 1. the float valve with guide functions is arranged in the porch of liquid on column plate; In the column plate arch area long axis direction of Induced flow floating valve with becomes with the liquid main flow direction-the α angle arranges, the α angle of column plate zones of different can be identical, also can be different, common α is 0 °-80 °, is preferably 5 °-70 °; 3. Induced flow floating valve and common float valve are alternately arranged at interval in other zone; 4. chord downcomer adopts the structure of non-linear downflow weir; 5. the float valve with guide functions described in the utility model means trapezoidal float valve, flow guide bar valve, guide float-valve, the trapezoidal float valve of guiding etc., and common float valve is the float valve that F1 float valve, bar valve etc. do not have guide functions.

Action principle of the present utility model is as follows:

(1) place, liquid inlet arranges the float valve with guide functions on column plate, can improve column plate porch gas-liquid contact condition, promotes flowing of whole liquid, reduces liquid level drop.

(2) arrange and the angled Induced flow floating valve of liquid main flow direction in arch area, liquid flow slow or that remain in a standstill can promote to flow in the arch area, quickening is to the flowing velocity of downspout direction, improve liquid residence time distribution on the column plate, also reduced simultaneously gradient of liquid level, thereby improve hydrodynamic performance, strengthen effect of mass transmitting.

(3) downflow weir of chord downcomer is the non-linear structure, can increase the effective bubbling area of column plate, reduces liquid flowing strength on the weir, improves liquid residence time and distributes.

(4) for the long column plate of flow path, Induced flow floating valve and common float valve are alternately arranged at interval in the zone beyond column plate liquid inlet district and arch area, can accelerate the flowing velocity of main liquid stream effectively, reduce the column plate gradient of liquid level.

The effect of the utility model valve plate is: compare with the prior art valve plate, have simple in structurely, be easy to make and be convenient to and install; Efficient is high by 8.2%, and 245Pa is hanged down in pressure drop, and disposal ability is high by 27.5%; Has little, the easy-operating advantage of good springiness, mist entrainment and leakage rate simultaneously.

Accompanying drawing and brief description of drawings.

Fig. 1 is the version of the utility model valve plate.

The direction of arrow is main liquid flow path direction among the figure, 1-tower body, 2-column plate, 3-chord downcomer, 4-downflow weir, 5-seal pot, 6-Induced flow floating valve, the common float valve of 7-.

Embodiment of the present utility model:

In φ 3000mm semicircle tower, use air--aqueous medium has been tested the effect of the utility model column plate, wherein downspout area/tower section is long-pending is 10%, non-rectilinear overflow height of weir 50mm, column plate flow path length is 1980mm, arch area is arranged 32 of Induced flow floating valves, and arrangement angle α sees Table-1, and other regional Induced flow floating valve of column plate and common float valve are alternately arranged at interval, wherein Induced flow floating valve is 30,198 of common float valves.

Table-1

Version	Arrangement architecture 1	Arrangement architecture 2	Arrangement architecture 3	Arrangement architecture 4	Arrangement architecture 5
						α	5°	20°	40°	60°	80°

Under equal conditions, tested the utility model valve plate and data such as the pressure drop that has several valve platies (F1 valve plate, L type bar valve column plate, trapezoidal float valve+L type bar valve column plate) now, entrainment, leakage, efficient respectively, the result shows: the efficient of the utility model valve plate, disposal ability, pressure drop, entrainment, leakage rate, gradient of liquid level etc. all have improvement by a relatively large margin.

Claims (2)

1, a kind of valve plate with the way of contact of improvement gas-liquid is characterized in that: 1. upward arrange the float valve (6) with guide functions in the porch of liquid at column plate (2); 2. the long axis direction of Induced flow floating valve (6) is becoming with the liquid main flow direction-arrangement of α angle in the column plate arch area, and α is 0 °-80 °; 3. Induced flow floating valve (6) is alternately arranged at interval with common float valve (7) in other zone; 4. the downflow weir (4) of chord downcomer (3) is the non-linear structure.

2, according to the valve plate that improves the gas-liquid way of contact that has described in the claim 1, it is characterized in that the long axis direction of Induced flow floating valve (6) and the α angle of liquid main flow direction are preferably 5 °-70 °.