CN107803089A - a demister - Google Patents

Abstract

The invention relates to a demister, which comprises a primary defoaming device and a secondary defoaming device; the primary defoaming device consists of a primary defoaming cylinder and a primary annular conical plate, and the secondary defoaming device consists of a secondary defoaming cylinder and a secondary annular conical plate; the secondary defoaming cylinder is arranged in the tower body below the gas outlet, and a secondary annular conical plate is arranged below the secondary defoaming cylinder; the primary defoaming cylinder is arranged at the outer side of the secondary defoaming cylinder, the bottom of the primary defoaming cylinder extends to the lower part of the secondary annular conical plate, and the primary annular conical plate is arranged below the primary defoaming cylinder; annular gaps are reserved between the primary defoaming cylinder and the primary annular conical plate and between the secondary defoaming cylinder and the secondary annular conical plate; the main bodies of the first-stage ring conical plate and the second-stage ring conical plate are conical structures with high middle parts and low periphery parts, water storage tanks are further arranged on the outer circumferences of the first-stage ring conical plate and the second-stage ring conical plate, and the water storage tanks of the first-stage ring conical plate and the second-stage ring conical plate are further connected with downcomers. The invention adopts the two-stage defoaming device to realize two continuous defoaming processes of the gas medium, thereby effectively improving the defoaming efficiency.

Description

a demister

technical field

The invention relates to a demister device, in particular to a demister used for separating gas from the entrained mist.

Background technique

In the chemical industry, a demister is installed on the top of many towers to reduce the entrainment of mist in the gas. At present, the main demisters include inertial demisters, swirl plate demisters, wire mesh demisters, etc. The purpose is to separate suspended liquid particles from the gas medium. However, most of these defoaming devices are single-layer defoaming devices, which rely on one defoaming process to remove the mist entrained in the gas. The structure is simple and the defoaming efficiency is not high.

Contents of the invention

The invention provides a demister, which uses a two-stage demister device to realize two consecutive defoaming processes of the gas medium, effectively improving the defoaming efficiency; wherein the wire mesh defoaming structure is simple and light, and the defoaming effect is good; the ring cone plate At the same time, it plays the role of collecting liquid and disturbing flow, further improving the separation effect.

In order to achieve the above object, the present invention adopts the following technical solutions to realize:

A demister, which is arranged at the gas outlet at the top of the tower body; includes a primary demister and a secondary demister; the primary demister is composed of a primary demister and a primary ring cone plate, the The secondary defoaming device is composed of a secondary defoamer and a secondary ring cone; The defoaming cylinder is set outside the secondary defoaming cylinder, and its bottom extends to the bottom of the secondary ring cone plate, and the primary ring cone plate is set under the primary defoaming cylinder; the primary defoaming cylinder and the primary ring cone plate There is an annular gap between the secondary demister and the secondary ring cone plate; the main bodies of the primary ring cone plate and the secondary ring cone plate are all conical structures with a high middle and low surroundings, and the primary ring cone plate 1. A water storage tank is also provided on the outer circumference of the secondary ring cone plate, wherein the water storage tank of the primary ring cone plate is also connected with a downcomer.

The first-stage defoamer and the second-stage defoamer are both composed of a circular cylinder and a wire mesh. A plurality of through holes are evenly opened on the circular cylinder, and the wire mesh is arranged around the outside of the circular cylinder.

The cone bottom circle of the conical structure of the first-stage ring cone-plate coincides with the projection of the first-stage demister cylinder on the first-stage ring cone-plate, and the cone-bottom circle of the second-stage ring cone-plate conical structure coincides with the second-stage The projections of the demister cylinder body on the secondary ring cone plate are coincident.

The bottom of the water storage tank of the first-stage ring cone plate is provided with a downcomer hole, and the downcomer is arranged under the downcomer hole. The downcomer is L-shaped, one end of which communicates with the downcomer hole, and the other end extends to the outside of the demister And close to the tower wall inside the tower body.

Compared with prior art, the beneficial effect of the present invention is:

1) The circular cylinder of the two-stage demisting device is surrounded by wire mesh, which can effectively intercept most of the mist in the gas;

2) After defoaming by the primary defoaming device, a small part of the unremoved gas enters the secondary defoaming device for separation and defoaming again, which greatly improves the defoaming efficiency;

3) On the one hand, the ring cone plate is used to carry the separated liquid and guide it to the water storage tank, and on the other hand, it can play a role in disrupting the flow. After the gas collides with it, it can strengthen the effect of aerosol separation;

4) The structure is simple and light, and the installation is convenient. For the defoaming of large-capacity gas, the consumables per unit capacity are less, and the overall cost is reduced.

Description of drawings

Fig. 1 is a schematic structural view of a demister according to the present invention.

In the figure: 1. Tower body 2. Gas outlet 3. Primary defoaming device 4. Secondary defoaming device 5. Circular cylinder 6. Wire mesh 7. Primary ring cone plate 8. Secondary ring cone plate 9 .water tank 10.downcomer

Detailed ways

The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

As shown in Figure 1, a demister according to the present invention is arranged at the gas outlet 2 at the top of the tower body 1; includes a primary demister 3 and a secondary demister 4; the primary demister 3 It is composed of a primary defoaming cylinder and a primary ring cone plate 7, and the secondary defoaming device 4 is composed of a secondary defoaming cylinder and a secondary circular cone plate 8; the secondary defoaming cylinder is arranged below the gas outlet 2 In the tower body 1, a secondary ring cone plate 8 is arranged below the secondary demister; The first-level ring cone plate 7 is arranged below the defoamer; there is an annular gap between the first-level defoamer and the first-level ring cone 7, and between the second-level defoamer and the second-level ring cone 8; the first-level ring The main bodies of the cone plate 7 and the secondary ring cone plate 8 are conical structures that are high in the middle and low around. The water storage tank 9 of the cone plate 7 is also connected with a downcomer 10 .

The first-stage defoamer and the second-stage defoamer are both composed of a circular cylinder 5 and a wire mesh 6. A plurality of through holes are evenly opened on the circular cylinder 5, and the wire mesh 6 is surrounded by the circular cylinder 5. outside.

The cone-bottom circle of the conical structure of the first-stage ring cone plate 7 coincides with the projection of the first-stage defoaming cylinder cylinder body on the first-stage ring cone plate 7, and the cone-bottom circle of the second-stage ring cone plate 8 conical structure It coincides with the projection of the circular barrel of the secondary demisting cylinder on the secondary ring cone plate 8.

The bottom of the water storage tank 9 of the first-stage ring cone plate 7 is provided with a downcomer hole, and the downcomer 10 is arranged below the downcomer hole. The downcomer 10 is L-shaped, one end communicates with the downcomer hole, and the other end extends to The outside of the demister is close to the tower wall inside the tower body 1.

During the movement of the gas medium in the tower body 1 to the top gas outlet 2, it first collides with the first-stage ring cone plate 7 of the first-stage demister 3, and then passes through the screen 6 and the through hole on the circular cylinder 5. The first-stage demister 3, most of the mist in the gas medium is intercepted by the wire mesh 6 of the first-stage demister 3, and flows along the circular cylinder 5 to the lower first-stage ring cone plate 7, completing the first stage. The first demister process; the gas medium after the first demister collides with the secondary ring cone plate 8 of the secondary demister 4, and then passes through the screen 6 and the through hole on the circular cylinder 5 to pass through the secondary demister The mist device 4, most of the remaining mist in the gas medium is intercepted by the wire mesh 6 of the secondary demister 4, flows along the circular cylinder 5 to the secondary ring cone plate 8 below, and completes the second demister Foaming process; the gas medium that has completed two defoaming processes is discharged from the gas outlet 2.

The mist on the secondary ring cone plate 8 flows into the corresponding water storage tank 9, and then overflows into the water storage tank 9 of the primary ring cone plate 7, and is led to the inner edge of the tower body 1 through the downcomer 10 and flows down the tower wall .

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (4)

1. A demister is arranged at the gas outlet at the top of the tower body; it is characterized in that it comprises a first-level demister and a second-level demister; the first-level demister consists of a first-level demister and a first-level demister The secondary defoaming device is composed of a secondary defoaming cylinder and a secondary circular cone plate; the secondary defoaming cylinder is arranged in the tower body below the gas outlet, and a secondary defoaming cylinder is arranged below the secondary Ring cone plate; the first-stage defoaming cylinder is set outside the second-stage defoaming cylinder, and its bottom extends to the bottom of the second-stage ring-cone plate; There is an annular gap between the first-stage ring cone plate and the second-stage defoaming cylinder and the second-stage ring cone plate; the main bodies of the first-stage ring cone plate and the second-stage ring cone plate are all conical structures with a high middle and low surroundings , the outer circumference of the first-level ring cone plate and the second-level ring cone plate are also provided with a water storage tank, wherein the water storage tank of the first-level ring cone plate is also connected with a downcomer. 2. A kind of demister according to claim 1, characterized in that, the first-stage demister and the second-stage demister are both composed of a circular cylinder and a wire mesh, and the circular cylinder is evenly opened A plurality of through holes are surrounded by a wire mesh on the outside of the circular cylinder. 3. A kind of demister according to claim 1, characterized in that, the cone bottom circle of the conical structure of the first-stage ring cone and the first-stage demister cylinder are on the first-stage ring cone-plate The projection coincides, the cone bottom circle of the conical structure of the secondary ring cone and plate coincides with the projection of the circular cylinder body of the secondary ring cone plate on the secondary ring cone plate. 4. A kind of demister according to claim 1, characterized in that, a downcomer hole is provided at the bottom of the water storage tank of the first-stage ring cone plate, and the downcomer is arranged below the downcomer hole, and the downcomer is L-shaped, one end communicates with the downcomer hole, and the other end extends to the outside of the demister and is close to the inner tower wall of the tower body.