CN212215529U

CN212215529U - Composite structure annular packing and spray tower

Info

Publication number: CN212215529U
Application number: CN202020402544.1U
Authority: CN
Inventors: 董仕宏; 吴倩倩; 李�灿
Original assignee: Suzhou Shijing Environmental Technology Co Ltd
Current assignee: Suzhou Shijing Technology Co.,Ltd.
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2020-12-25
Anticipated expiration: 2030-03-26

Abstract

The utility model relates to a composite construction annular is packed, including annular barrel, connect at the inside bridge assembly of annular barrel, set up porosely on the annular barrel, the multirow has been seted up in the hole, and every row of hole distributes along the upper and lower direction of annular barrel, and the hole is isosceles triangle, and every row of apex angle in two adjacent isosceles triangle holes up, another down, bridge assembly connects on every row of annular barrel between the hole. A spray tower comprises a tower body, a spray layer and a packing layer, wherein the packing layer comprises a plurality of annular packing materials with composite structures. The utility model discloses improved liquid and packed intraformational distribution condition, reduced the whole pressure drop of spray column, improved intra-annular space utilization, increased gaseous flux and reduced the resistance, improved the distribution of liquid on packing, improved heat transfer, mass transfer efficiency and reaction efficiency, specific surface area and porosity are bigger under the same nominal size, pile up the number still less, the quality is lighter, and surface wettability can be better.

Description

Composite structure annular packing and spray tower

Technical Field

The utility model relates to a filler field especially relates to a composite construction annular is packed and spray column.

Background

Along with the continuous promotion of the world industrialization process in recent years, the environmental pollution problem brought by the industrial development is increasingly aggravated, wherein the waste gas pollution is an important pollution source which is urgently needed to be treated, and along with the increasingly strict regulation and control of the atmospheric pollutant emission in China, more and more enterprises begin to continuously update and optimize the flue gas purification technology to meet the requirement of ultralow emission.

The spray tower has the advantages of high desulfurization and denitration efficiency, simple equipment structure, low maintenance cost and the like, and is widely applied to the waste gas treatment in the electric power and chemical industry. The filler can be divided into bulk filler and integral filler according to stacking form, and the bulk filler can be divided into annular filler, saddle-shaped filler, ring-shaped saddle-shaped filler and spherical filler according to different structural characteristics. The annular packing mainly comprises three types of Raschig rings, pall rings and step rings, the Raschig rings are rarely used, and the pall rings and the step rings are mainly widely applied at present. The main problem that exists of traditional annular packing is that the contact between the filler is linear contact usually, therefore packs between the space less, and packs surface utilization and rate lower, and gas-liquid distribution is relatively poor, and mass transfer, heat transfer efficiency between the gas-liquid are not high, and gaseous average path around packing outer wall is very long simultaneously, and gaseous resistance through the packing layer is great, leads to the whole pressure loss of spray column great.

Disclosure of Invention

The utility model aims at providing a composite construction annular packing, pack the packing that is used for increasing atmosphere-liquid contact surface inside the spray column, makes it take place intensive mixing and reaction.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

the utility model provides a composite construction annular packing, includes annular barrel, connects annular barrel inside the subassembly of putting up a bridge, annular barrel on set up porosely, the hole seted up the multirow, every row the hole follow annular barrel's upper and lower direction distribute, the hole be isosceles triangle, the apex angle in every adjacent two isosceles triangle holes of row is up, another is down, the subassembly of putting up a bridge connect every row annular barrel between the hole on.

Preferably, the number of the rows of the holes is N, and the number of the bridging components is N-1.

Preferably, the bridging component comprises a cross-shaped bridging which is connected to the annular cylinder body between the holes in each row.

Further preferably, the bridging component further comprises an annular bridge, and the annular bridge is connected to the cross-shaped bridge.

Further preferably, the centers of the cross-shaped bridge and the annular bridge are overlapped.

Further preferably, the upper and lower adjacent two of the cruciform bridges are not overlapped.

Preferably, the upper edge and/or the lower edge of the annular cylinder body are/is outwards turned out to form a flanging.

Preferably, the flange is provided with a groove.

Further preferably, the groove body is a square groove body.

Preferably, the annular packing is made of PP material and 316 stainless steel.

Another object of the utility model is to provide a spray column.

the utility model provides a spray column, includes the tower body, sets up the tower body inside spray the layer, be located spray the packing layer of layer below, the packing layer include a plurality of annular fillers, annular filler be composite construction annular filler.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

the utility model discloses improved the intraformational distribution condition of liquid at the filler, reduced the whole pressure drop of spray column, improve intra-annular space utilization, increased gaseous flux and reduced the resistance, improved the distribution of liquid on the filler, improve waste gas and spray the heat transfer and the mass transfer efficiency of thick liquid at the packing layer, improved reaction efficiency, compare with traditional annular filler, specific surface area and porosity are bigger under the same nominal size, it still less to pile up the number, the quality is lighter, surface wettability can be better.

Drawings

FIG. 1 is a perspective view of the present embodiment;

FIG. 2 is a side view of the present embodiment;

fig. 3 is a top view of the present embodiment.

In the above drawings: 1. an annular cylinder; 10. an aperture; 11. flanging; 110. a trough body; 20. bridging in a cross shape; 21. and (4) annularly bridging.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model provides a spray column, includes the tower body, sets up at the inside layer that sprays of tower body, is located the packing layer that sprays the layer below, and the packing layer includes a plurality of annular fillers, and annular filler is composite construction annular filler, and annular filler is the PP material.

As shown in fig. 1-3: in this embodiment: composite construction annular packing includes annular barrel 1, connects the subassembly of building bridge in annular barrel 1 inside. 1 specification of an annular cylinder body: diameter × height × wall thickness is 50mm × 50mm × 1.5 mm. The annular cylinder body 1 is provided with holes 10, the holes 10 are provided with four rows, each row of holes 10 are distributed along the upper direction and the lower direction of the annular cylinder body 1, the holes 10 are isosceles triangles, and the vertex angles of two adjacent isosceles triangle holes 10 in each row are upward and the other is downward. The utility model discloses change the rectangular hole structure on the annular filler into triangle hole structure on the basis of traditional pall ring structure, improved the structural strength and the toughness of single annular filler, improved the utilization ratio of intra-annular space and inner surface simultaneously greatly.

The upper edge and the lower edge of the annular cylinder body 1 are turned outwards to form an arc-shaped flanging 11, and a square groove body 110 is arranged on the flanging 11. The structure increases the mechanical strength of the filler, changes the linear contact between the fillers into point contact, increases the gaps between the fillers, reduces the resistance of gas circulation and reduces the overall pressure drop of the spray tower; meanwhile, the arc-shaped flanging 11 becomes a collecting and distributing point for liquid to flow along the surface of the filler, and the square groove body 110 continuously destroys the flowing boundary layer of the liquid film, so that the surface of the liquid film is promoted to be updated, and the mass transfer efficiency and the heat transfer efficiency are improved.

The bridging components are provided with three groups which are connected on the annular cylinder body 1 between each row of holes 10. The bridging component comprises cross bridges 20 and annular bridges 21, the cross bridges 20 are connected to the annular cylinder 1 between each row of holes 10, the annular bridges 21 are connected to the cross bridges 20, the centers of the cross bridges 20 and the annular bridges 21 are overlapped, two adjacent cross bridges 20 are not overlapped, namely, the next cross bridge 20 rotates for example 45 degrees relative to the previous cross bridge 20. The cross-shaped bridge is 20 in specification: 2mm × 3mm in height × width; 21-specification annular bridge: the height × width is 2mm × 2mm, and the outer diameters of the upper, middle, and lower three-layer annular bridges 21 are 30mm, 22mm, and 30mm, respectively. The internal bridge component increases the surface area of gas-liquid contact and enhances the gas-liquid reaction effect.

Characteristic parameters of the annular packing in the embodiment:

1. specific surface area: the specific surface area of the filler per unit of the packing volume was 118m as determined and calculated in this example²/m³。

2. Porosity: in the dry state, the ratio of the volume occupied by the void part in the packing layer in the spray tower to the volume of the packing layer was found to be 97 in this example by measurement.

3. Stacking weight: the weight of the filler per unit volume in this example was 57kg/m in terms of the bulk weight of the filler obtained by the in-situ test³。

4. Stacking number: the number of fillers per unit volume in this example was 5890 by an on-site test.

5. Dry packing factor: the specific surface area of the filler which is not wetted by the liquid and the third power of the porosity are calculated, and the dry filler factor of the filler of the patent is 129.3.

This patent and pall ring performance parameter contrast:

。

compared with pall rings, the present embodiment has the advantages of larger specific surface area, larger porosity, lighter packing weight per unit volume, fewer stacked numbers and equivalent dry packing factors, so the present embodiment has more excellent fluid mechanical properties, smaller resistance and better heat and mass transfer effects.

The working principle of the embodiment is as follows: the annular packing with the composite structure is scattered in the spray tower, the packing layer is arranged below the spray layer, the spray slurry is sprayed on the packing, the waste gas flows upwards from the bottom of the tower, and the waste gas and the spray slurry react on the packing to perform gas-liquid heat transfer and mass transfer.

The first embodiment is as follows:

according to this embodiment, adopt PP material (polypropylene) to make filler material object to survey filler absorption reaction effect with flue gas denitration absorption experiment, the utensil is as follows for the volume:

in the embodiment, the simulated flue gas used in the experiment in the laboratory is used as the gas to be treated, the volume flow qv of the flue gas is 380mL/min, and the content of NO is 200mg/m³，NO₂The content is 30mg/m³The temperature of the flue gas is 45 ℃, the gas firstly enters a small-sized oxidation chamber for forced oxidation reaction, and the purpose is to oxidize NO into NO₂Then introducing the oxidized flue gas into an absorption tower reactor with a real spray tower ratio of 1:12 for reaction, wherein the filler is stacked 20cm below a spray layer, the denitration efficiency measured at the outlet of the absorption tower reactor is 94%, and the content of NOx in the outlet flue gas is 12.4mg/m³The inlet and outlet pressure drop was 62 Pa.

Comparative example one:

adopt the PP material pall ring the same with this embodiment specification to carry out the contrast test to the flue gas denitration absorbs the experiment and surveys pall ring filler absorption reaction, and specific content is as follows:

simulated flue gas used in experiments in laboratories is taken as gas to be treated, the volume flow qv of the flue gas is 380mL/min, and the content of NO is 200mg/m³，NO₂The content is 30mg/m³The temperature of the flue gas is 45 ℃, the gas firstly enters a small-sized oxidation chamber for forced oxidation reaction, and the purpose is to oxidize NO into NO₂Then the oxidized flue gas is introduced into an absorption tower reactor with the ratio of the oxidized flue gas to a real spray tower being 1:12 for reaction, pall ring packing is stacked at the position 20cm below a spray layer,the denitration efficiency measured at the outlet of the reactor of the absorption tower is 91 percent, and the NOx content in the outlet flue gas is 16.1mg/m³And the pressure drop at the inlet and the outlet of the absorption tower reactor is 74 Pa.

Example two:

according to the embodiment, 316 stainless steel is adopted to make a filler material object, and a flue gas denitration absorption experiment is used for investigating the effect of the filler absorption reaction, wherein the specific contents are as follows:

in the embodiment, the simulated flue gas used in the experiment in the laboratory is used as the gas to be treated, the volume flow qv of the flue gas is 380mL/min, and the content of NO is 200mg/m³，NO₂The content is 30mg/m³The temperature of the flue gas is 45 ℃, the gas firstly enters a small-sized oxidation chamber for forced oxidation reaction, and the purpose is to oxidize NO into NO₂Then introducing the oxidized flue gas into an absorption tower reactor with a real spray tower ratio of 1:12 for reaction, wherein the filler is stacked 20cm below a spray layer, the denitration efficiency measured at the outlet of the absorption tower reactor is 92%, and the content of NOx in the outlet flue gas is 13.6mg/m³The inlet and outlet pressure drop is 55 Pa.

Comparative example two:

a316 stainless steel pall ring with the same specification as the embodiment is adopted to carry out a comparative test, and a flue gas denitration absorption experiment is used for investigating the pall ring packing absorption reaction, and the specific contents are as follows:

simulated flue gas used in experiments in laboratories is taken as gas to be treated, the volume flow qv of the flue gas is 380mL/min, and the content of NO is 200mg/m³，NO₂The content is 30mg/m³The temperature of the flue gas is 45 ℃, the gas firstly enters a small-sized oxidation chamber for forced oxidation reaction, and the purpose is to oxidize NO into NO₂Then introducing the oxidized flue gas into an absorption tower reactor with a real spray tower ratio of 1:12 for reaction, stacking pall ring fillers 20cm below a spray layer, measuring the denitration efficiency of 89.4% at an outlet of the absorption tower reactor, and measuring the NOx content in the outlet flue gas to be 17.3mg/m³And the pressure drop at the inlet and the outlet of the absorption tower reactor is 68 Pa.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a composite construction annular packing, includes annular barrel, connects annular barrel inside the bridge assembly, annular barrel on set up porosely, its characterized in that: the holes are provided with a plurality of rows, each row of holes are distributed along the upper direction and the lower direction of the annular cylinder body, the holes are isosceles triangles, the vertex angles of every two adjacent isosceles triangle holes in each row face upwards, the other one faces downwards, and the bridging component is connected to the annular cylinder body between every two adjacent rows of holes.

2. The composite structural ring packing of claim 1, wherein: the number of the rows of the holes is N, and the number of the bridging components is N-1.

3. The composite structural ring packing of claim 1, wherein: the bridging component comprises a cross-shaped bridging which is connected to the annular cylinder body between the holes in each row.

4. The composite structural ring packing of claim 3, wherein: the bridge assembly further comprises an annular bridge, and the annular bridge is connected to the cross-shaped bridge.

5. The composite structural ring packing of claim 4, wherein: the centers of the cross-shaped bridge and the annular bridge are superposed.

6. The composite structural ring packing of claim 1, wherein: the upper edge and/or the lower edge of the annular cylinder body are/is turned outwards to form a flanging.

7. The composite structural ring packing of claim 6, wherein: the flanging is provided with a groove body.

8. The composite structural ring packing of claim 7, wherein: the tank body is a square tank body.

9. The composite structural ring packing of claim 1, wherein: the annular packing is made of PP materials and 316 stainless steel.

10. The utility model provides a spray column, includes the tower body, sets up the tower body inside spray the layer, be located spray the packing layer of layer below, the packing layer include a plurality of annular fillers, its characterized in that: the annular packing is the composite structure annular packing of any one of claims 1 to 9.