CN114272702B - Boiling type foam desulfurization dust removal mass transfer component, design method thereof and desulfurization dust removal device - Google Patents
Boiling type foam desulfurization dust removal mass transfer component, design method thereof and desulfurization dust removal device Download PDFInfo
- Publication number
- CN114272702B CN114272702B CN202111628534.5A CN202111628534A CN114272702B CN 114272702 B CN114272702 B CN 114272702B CN 202111628534 A CN202111628534 A CN 202111628534A CN 114272702 B CN114272702 B CN 114272702B
- Authority
- CN
- China
- Prior art keywords
- mass transfer
- transfer member
- flow field
- module
- square
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention provides a boiling type foam desulfurization dust removal mass transfer component, which comprises a plurality of module areas, wherein the pore uniformity of at least two of the module areas is different. Through the modular design, the non-uniform flow field can be flexibly adjusted, and finally, the sufficient removal of sulfur dioxide and dust in the flue gas is realized, so that the ultra-low emission target is achieved.
Description
Technical Field
The invention relates to the field of flue gas purification, in particular to a boiling type foam desulfurization dust removal mass transfer component, a design method thereof and a desulfurization dust removal device.
Background
In the spray type desulfurization absorption tower for purifying coal-fired flue gas, desulfurization slurry meets and is mixed with the flue gas to react, so that desulfurization and dust removal of the flue gas are realized.
Boiling foam desulfurization dust removal mass transfer elements have been used to facilitate mixing and reaction of flue gas with the desulfurization slurry. The boiling type foam desulfurization dust removal mass transfer component is a porous mass transfer component. When the flue gas passes through the boiling type foam desulfurization dust removal mass transfer component, a boiling type foam layer is formed by self excitation, the gas-liquid contact area and the turbulence intensity are increased, and the mass transfer effect of sulfur dioxide and slurry is enhanced. Through the inertia and diffusion trapping effect of the foam on the particles in the foam, the collision adhesion probability of the dust particles and the liquid phase surface is improved, and the high-efficiency removal of fine particle dust is realized.
At present, the requirement for treating the pollutants in the coal smoke is continuously improved, and the ultralow emission gradually becomes the mainstream. Because the ultra-low emission popularization time is short, most of the applied units are high-quality coal, and the difference between the actual operation coal type of the units and the designed coal type is large, the traditional mass transfer component is large in investment and high in operation cost when being applied to a high-sulfur high-ash inferior coal unit, and the ultra-low emission effect is not obvious. In an attempt to achieve ultra-low emission, proposed solutions include increasing the number of spray layers of the absorber tower and increasing the circulation volume of the slurry; the wall ring is additionally arranged, so that the smoke corridor is reduced; increasing the number of layers of mass transfer members, and the like. The disadvantages of increasing the number of spraying layers of the absorption tower and increasing the circulating amount of the slurry are high operation cost. The defects of adding the wall ring and reducing the smoke corridor are not obvious in effect. The disadvantages of increasing the number of layers of the mass transfer member include increased flue gas resistance in the absorption tower and high operation cost; and flow field distribution is different in different units, and the homogeneous mass transfer component has poor rectification effect and poor applicability.
A double-hole type mass transfer member has been proposed which employs two kinds of holes having different hole diameters periodically arranged at intervals to constitute a hole array in the mass transfer member, and which is formed by stacking such hole arrays in multiple layers in an absorption column.
There is still a need for development of a bubbling-type foam desulfurization dust removal mass transfer member.
Disclosure of Invention
In one aspect, the invention provides a boiling type foam desulfurization dust-removal mass transfer component, which is a plate-shaped body and comprises a plurality of through holes extending along the thickness direction of the plate,
said mass transfer member comprising a plurality of modular zones in the plane of the plate, each modular zone consisting of a plurality of identical square zones, each of said through holes being in one square zone,
wherein a pore uniformity of at least two of the plurality of module regions is different,
the pore uniformity for each module area is calculated by:
in formula (I), X represents the uniformity of pores in the module region, n represents the number of square regions in the module region and is an integer greater than 1, and epsilon i Denotes the via coverage of the ith square region, and ε denotes the average via coverage in the module regionThe capping rate.
Preferably, the range of pore uniformity is 0.85 ≦ X ≦ 0.95.
Preferably, the side length a of the square area is 28mm to 42mm.
Preferably, the area of each module region ranges from 1m 2 To 2m 2 。
Preferably, the thickness of the plate-like body ranges from 3mm to 5mm.
Preferably, the through hole is a circular through hole concentric with the square region.
In another aspect, the present invention provides a method of designing a mass transfer member as described above, characterized in that it comprises the steps of:
step 1: a layer of mass transfer component is arranged in the absorption tower in a simulated manner;
step 2: carrying out simulation calculation on flow field distribution in the absorption tower;
and step 3: comparing the flow field obtained by the simulation calculation in the step 2 with a target flow field, finishing the design if the flow field reaches the standard, and performing the step 4 if the flow field does not reach the standard;
and 4, step 4: and (3) adjusting the pore uniformity of the module area of the flow field substandard area in a simulated mode, and then performing the step 2 again.
Preferably, in step 1, the pore uniformity of each module region of a layer of mass transfer members arranged in a simulation is 1.
Preferably, in step 4, the average via coverage is set constant during the simulation tuning.
In still another aspect, the present invention provides a desulfurization dust-removing apparatus, characterized in that the desulfurization dust-removing apparatus comprises:
a desulfurization absorption tower; and
only one mass transfer member disposed in the desulfurization absorption column, the mass transfer member being the above-described mass transfer member.
Drawings
Fig. 1 schematically shows a non-uniform via distribution in one module area.
Figure 2 shows the distribution of the different module zones within the absorption column.
Detailed Description
The existing boiling type foam desulfurization dust removal mass transfer component, whether a single hole type or a periodically arranged double hole type, is homogeneous in the same cross section in the absorption tower. In other words, the arrangement of the through-openings of the mass transfer member is the same in different regions of the cross-section. However, the flow fields in different regions within the absorption column cross-section may vary greatly. Therefore, homogeneous mass transfer members are not highly adaptable.
In addition, the design parameters of the existing boiling type foam desulfurization dust removal mass transfer component comprise: the pore diameter of the through holes, the distribution pattern and the pitch of the holes, the number of layers of the mass transfer member, and the like. However, the inventor finds that in engineering practice, when the mass transfer member structure is designed by using the above design parameters, each parameter needs to be adjusted for different non-uniform flow fields in the absorption tower, and the adjustment principle is mainly trial and error, so that the design process is complex, and the optimization of the boiling effect becomes difficult.
The invention provides a heterogeneous boiling type foam desulfurization dust removal mass transfer component, which is arranged in a partition manner according to the flow field distribution of different units, and realizes the high-efficiency low-cost ultralow emission of high-sulfur high-ash low-grade coal by adopting a single-layer heterogeneous boiling type foam desulfurization dust removal mass transfer component. The present invention also provides heterogeneous structural characterization parameters suitable for use in the mass transfer member of the present invention for ease of design.
Specifically, the invention provides a boiling type foam desulfurization dust-removal mass transfer component, which is a plate-shaped body and comprises a plurality of through holes extending along the thickness direction of the plate,
said mass transfer member comprising a plurality of modular zones in the plane of the plate, each modular zone consisting of a plurality of identical square zones, each of said through holes being in one square zone,
wherein a pore uniformity of at least two of the plurality of module regions is different,
the pore uniformity for each module area is calculated by:
in the formula (I), X represents the pore uniformity of the module region, n represents the number of square regions in the module region and is an integer greater than 1, and epsilon i Represents the via coverage of the i-th square region and epsilon represents the average via coverage in the module region.
The mass transfer member of the present invention is a plate-like body and includes a plurality of through holes extending in the thickness direction of the plate. As with conventional mass transfer members, in use, the plate-like body is mounted in a desulfurization absorption column with the plane of the plate parallel to the cross-section of the column. The flue gas is introduced from the bottom of the column and the absorption slurry is introduced above the mass transfer member, for example, by spraying it downwards. Thus, the rising flue gas will form a bubbling-type foam layer at the through-holes of the mass transfer member.
Unlike conventional mass transfer members, the mass transfer member of the present invention comprises a plurality of modular zones of differing configuration in the plane of the plates. Conventional mass transfer members all have the same configuration within the same absorption column cross section and are therefore homogeneous. The mass transfer member of the present invention can then be divided into a plurality of modular regions, and each modular region has its own configuration and is therefore heterogeneous. Specifically, the difference in configuration refers to the difference in pore uniformity as a parameter detailed below. In the present invention, the case where the uniformity of the pores is the same in all the module regions is not included, but the case where the uniformity of the pores is the same in some of the module regions may be included. In other words, the pore uniformity of at least two of the plurality of module regions is different.
The parameter of the invention, the pore uniformity, is obtained by calculation. Pore uniformity is a descriptive parameter of pore uniformity for each modular region in a mass transfer member having the configuration of the present invention. The inventive construction is characterized in that each module region is composed of a plurality of identical square regions, and each through-hole is in one square region.
Each module area may be divided into a number of identical square areas. The same square region means that the sides of the square region are the same. These square areas are adjacent to each other and tiled over one module area. In the present disclosure, each of the vias in one square region means: in the module area, each via is only within one square area, and does not span two or more square areas. Furthermore, there is no situation where multiple vias are in the same square region, or where no square region contains more than two vias. In other words, each square region contains at most one via.
In other words, the orthographic projection of the square areas of the same size on the plate plane covers the orthographic projection of the module area on the plate plane, and the orthographic projection of each through hole on the plate plane is located only within the orthographic projection of one square area on the plate plane. There are no vias spanning the different square regions.
Based on such a configuration, the pore uniformity can be calculated. The pore uniformity is calculated by formula (I), X represents the pore uniformity of the module area, n represents the number of square areas in the module area and is an integer greater than 1, epsilon i Represents the via coverage of the i-th square region and epsilon represents the average via coverage in the module region. The ith here is merely to distinguish the different square regions and does not indicate any ordering. i ranges from 1 to n. Typically, there is one via in each square region. However, there may also be some square areas, where there are no vias.
Via coverage refers to the ratio of the area of the via to the area of the square region. In other words, the quotient of the area of the orthographic projection of the through-hole on the plate plane divided by the area of the square region. For each square area, one via coverage can be calculated. The average via coverage refers to the arithmetic mean of the via coverage of each square region in the module region.
The size and number of square areas can be different in different module areas, but the pore uniformity X is calculated according to formula (I).
As can be seen from formula (I), X is the pore uniformity defined based on local porosity, and is used in the present invention to characterize the structural randomness of the heterogeneous foam mass transfer member. The pore uniformity X is the same in all square areas in the module area (0,1) and the smaller the X value, the larger the randomness, the more nonuniform the pore, and the larger the X value, the smaller the randomness, and the more uniform the pore, X = 1.
For example, if 1600 square regions are included in a 1.2m × 1.2m module region, each square region has a side length of 30mm, 600 of 1600 square regions have through holes with a diameter of 25mm, and 1000 have through holes with a diameter of 28 mm. Then, the module region has 600 square regions with a via coverage of 0.545 and 1000 square regions with a via coverage of 0.684, and the average via coverage is (0.545 × 600+0.684 × 1000)/1600 =0.632. The pore uniformity of this module region is:
one of the characteristics of the boiling foam desulfurization dust removal mass transfer member of the present invention is that the mass transfer member is designed based on the parameter of pore uniformity rather than the average porosity or the position and size of each specific through hole. The inventors have found that when considering the effect of the boiling foam mass transfer member on the non-uniform flow field, this parameter of pore uniformity can be considered, so that the flow field can be more easily optimally designed.
The boiling foam desulfurization dust removal mass transfer member of the present invention is further characterized in that the pore uniformity of at least two of the plurality of module zones is different. In other words, with the mass transfer member of the present invention, populations of through-holes having different pore uniformities can be provided in different regions in the absorber column to accommodate non-uniform flow fields. In the mass transfer member of the related art, even if the through holes of various sizes are used, the through holes are periodically and uniformly arranged in the plane of the plate, and the uniformity of the pores is the same throughout the plane of the plate. This is because it is difficult to implement the design of the heterogeneous via in the plane of the board. In general, the design can only be performed by parameters such as aperture diameter and aperture spacing, and if a large number of apertures with different aperture diameters are irregularly and non-uniformly arranged, it is very difficult to simulate and calculate the flow field based on the specific configuration of each aperture. More importantly, it is sometimes not clear how to adjust each hole to facilitate design goals. In this regard, without being bound to any theory, the inventors have discovered that a via property can be characterized in a localized region using a parameter of void uniformity. Therefore, the whole mass transfer component can be correspondingly divided into different module areas, the connection between the pore uniformity change and the flow field change adjustment is established, and the design of the required mass transfer module is conveniently and quickly realized.
The scheme of the invention can more conveniently and flexibly design the heterogeneous boiling type foam desulfurization dust removal mass transfer component aiming at the non-uniform flow field, finally realize the full removal of sulfur dioxide and dust in the flue gas and achieve the aim of ultralow emission. Compared with the conventional homogeneous mass transfer component, the ultra-low emission of the high-sulfur high-ash coal is realized under the condition of not increasing the circulating amount of slurry, and the operation cost is low. Particularly, the module areas are arranged according to the flow field of the unit in a partition mode, so that the desulfurization and dust removal effects are obvious, the pressure resistance is low, and the power of a booster fan is reduced, thereby reducing the operation cost
The various modular zones in the mass transfer member of the present invention may be integrated, but may also be separately prepared and assembled in an absorption column. That is, the mass transfer member of the present invention may be assembled from a plurality of individual modules. More generally, the individual modular members may not be in intimate contact with each other.
The range of pore uniformity in the module region of the present invention may preferably be 0.85. Ltoreq. X.ltoreq.0.95, more preferably 0.85 < X < 0.95. When the pore uniformity is too high, the defect is that the adjustment and adaptability of the flow field are weak. For example, when X is very close to 1, uniformly distributed vias of substantially the same size in the same module area result in substantially no improvement in the local flow field. When the pore uniformity is too low, too many pores or micropores exist in the square region, resulting in an influence on the ventilation.
The mass transfer member of the present invention is a bubbling-type foam mass transfer member. The inventor finds that the side length a of the square area is preferably 28mm to 42mm according to the actual condition of mixing the flue gas and the desulfurization slurry, such as the conventional flue gas flow rate, the flowability of the desulfurization slurry and other parameters. In this range, the effect of forming the foam is optimal. Since the vias are within the square region, the maximum size of the vias is correspondingly limited by the size of the square region. For example, when the through-hole is a circular through-hole concentric with the square region, the maximum value of the radius thereof is 14 to 21mm, respectively. The maximum size of the through-holes and the solid part of the mass transfer member will influence the formation of smoke foam in combination.
The modular zones in the mass transfer member of the present invention can be designed according to the needs of the absorption column. The section of the absorption tower can be divided into a plurality of areas according to the flow field condition in the absorption tower, and a module area is designed for each area. The area of the module region is preferably 1 to 2m 2 . The area is too large, which is not beneficial to accurately calculating the non-uniform flow field. Too small an area may result in an unnecessary increase in the amount of calculation when simulating the flow field.
The plate-like body in the mass transfer member of the invention is usually made of steel plate. The thickness of the plate-like body is preferably in the range of 3 to 5mm. When the thickness is too low, the disadvantages are severe deformation and low load bearing. When the thickness is too high, the disadvantage is increased cost.
The through-holes of the present invention may be of any shape. Circular through holes concentric with the square regions are preferred for a combination of ease of calculation, ease of manufacture, structural robustness, etc. When concentric circular vias are used, the via coverage ε in a single square region i Will not exceed pi/4.
Fig. 1 schematically shows a non-uniform via distribution in one module region for exemplary illustration of formula (I) of the present invention. The module area has 4 square areas with a concentric circular through hole in each square area. Each via is in one square region. In the 4 square areas, the through hole coverage rate is respectively epsilon 1 、ε 2 、ε 3 、ε 4 . Its average via coverage = (epsilon) 1 +v 2 +v 3 +v 4 )/4. The pore uniformity X of the module area is
Illustratively, fig. 2 shows the distribution of different module zones within an absorption column. FIG. 2 is a schematic sectional top view of an absorption column illustrating a square absorption column with a cross section divided into 32 zones. Each zone is provided with a modular zone of the mass transfer structure of the invention. Five module areas I to V with different pore uniformity are arranged. This is an arrangement that is made assuming central symmetry of the flow field within the flue. It is understood that the module regions having different uniformity may be appropriately arranged according to different flow field distributions. The jagged edges in the figure are used to schematically indicate that the module regions consist of smaller square regions.
The invention also provides a method for designing the mass transfer member, which is characterized by comprising the following steps:
step 1: a layer of mass transfer component is arranged in the absorption tower in a simulated manner;
step 2: carrying out simulation calculation on flow field distribution in the absorption tower;
and step 3: comparing the flow field obtained by the simulation calculation in the step 2 with a target flow field, finishing the design if the flow field reaches the standard, and performing the step 4 if the flow field does not reach the standard;
and 4, step 4: and (3) adjusting the pore uniformity of the module area of the flow field substandard area in a simulation mode, and then performing the step 2 again.
The design method of the invention refers to a method for designing an applicable mass transfer component aiming at a specific absorption tower and working conditions. The method includes computing results by an iterative method, starting from an initial state.
In step 1, a layer of mass transfer member is set in the absorption tower as an initial state in a simulated manner. Preferably, the pore uniformity of each module zone of a layer of mass transfer members in the simulated arrangement is 1. I.e. starting from a completely homogeneous mass transfer member state. Of course, the calculation can be performed from any preset initial value of the pore uniformity of the module area.
In step 2, the flow field distribution is calculated by simulation. And calculating the influence of the mass transfer component on a gas-liquid flow field in the tower. The calculation may be performed using conventional flow field simulation methods, for example using flow field simulation software.
Step 3 is a judgment step. And (3) comparing the flow field obtained by the simulation calculation in the step (2) with the target flow field, and checking whether the flow field reaches the standard. In the present invention, the term "meet-a-criteria" means that the deviation of the parameter between the simulated calculated flow field and the target flow field is within an acceptable range. The flow field reaches the standard, which indicates that the block division of the mass transfer component and the pore uniformity X of each block area can cause the required flow field, thus finishing the design of the mass transfer component. The parameter as the standard of standard deviation may depend on the actual requirements, and may be, for example, one or more of the parameters such as the flow size, the flow distribution, etc. The specifically set acceptable range of the deviation may be determined according to actual requirements, and may be, for example, 10% or less, preferably 5% or less, more preferably 1% or less, and most preferably no deviation. In one embodiment, qualifying may refer to qualifying the spatial distribution of flue gas flow sizes. In one embodiment, qualifying can refer to qualifying the spatial distribution of the flow of the target component in the flue gas. If the standard is reached, the design can be finished. And preparing a mass transfer component according to the obtained design scheme, and installing the mass transfer component in the absorption tower, so that a target flow field can be realized in the absorption tower. If the parameter does not reach the standard, the parameter is still required to be further adjusted, and then the subsequent step 4 is required. It should be appreciated that in this step 3, the comparison of the target flow fields may be done in a zoned fashion. Thus, the comparison result may be that some regions meet and other regions do not. In this case, the design may be ended for the reached area, and step 4 may be performed for the non-reached area.
And 4, adjusting the pore uniformity of the module area of the area with the flow field not meeting the standard in a simulated manner. Adjusting the pore uniformity refers to causing the pore uniformity to vary. The pore uniformity can vary due to changes in any of the variables in formula (I). For example, the pore uniformity can be varied by varying the size and number of square regions and correspondingly varying the through holes therein. Most simply, the pore uniformity can be varied by varying the via coverage in a portion of the square region. Preferably, in step 4, the average via coverage is set constant during the simulation tuning. In this way, the total gas-liquid flow capacity can be kept from changing significantly. If necessary, the module area related to the flow field substandard area can be divided again.
The specific structure of the module area corresponding to the adjusted pore uniformity can be calculated. For example, a target aperture uniformity is input to a computer, and the computer automatically gives a distribution of through holes corresponding to the aperture uniformity. Of course, a variety of different specific square region and via configurations are possible for the same uniformity of porosity. However, surprisingly, these particular structures, although different, have substantially the same effect on the flow field as a bubbling-type mass transfer member. Without being bound to any theory, this may be related to flow processes and the uneven openness of the mass transfer member in the formation of foam from mixing of the gas-liquid stream in the solid and through-hole regions of the mass transfer member. Thus, for example, a correspondence of a target pore uniformity to a particular structure/mode of the module region may be established in the database, and when the pore uniformity is adjusted, the particular structure of the module region is adjusted accordingly. As described above, the same target pore uniformity may correspond to a variety of module region specific patterns (including specific configurations and sizes). From which easy-to-manufacture, common or special patterns can be selected for storage in a database, and when making adjustments, one of the suitable patterns is selected for design, depending on the specific situation.
The invention takes the pore uniformity as the adjusted parameter in the design method, and can conveniently adjust the flow field to the target state. Generally, a smaller pore uniformity can be set when a larger change in the flow field is required before and after passing through the mass transfer member. For example, when it is desired to rectify a non-uniform flow or to disrupt a uniform flow condition, a smaller pore uniformity may be used. Conversely, when it is desired that the uniformity of flow be substantially constant, a higher uniformity of porosity can be set. Of course, the characteristics of the relationship between pore uniformity and flow field variation can also be summarized according to specific situations. The method of debugging the design based on pore uniformity is much simpler than trying each hole individually or changing all holes uniformly.
After the modification, step 2 is again performed on the new simulated mass transfer member.
And (4) repeating the steps 2 to 4 until the calculated flow field reaches the standard, and designing to obtain the corresponding mass transfer component.
Finally, the above calculation results can be conducted to a machine tool to prepare the mass transfer member of the present invention.
The above design and calculation can be performed by using a computer.
By the iterative design method, the flue gas flow field in the desulfurizing tower can be more uniform, and the desulfurizing and dedusting efficiency is improved.
The mass transfer component can be used for a desulfurization and dust removal device. In one embodiment of the present invention, a desulfurization dust-removing apparatus comprises: a desulfurization absorption tower; and only one mass transfer member disposed in said desulfurization absorption column, said mass transfer member being the above-described mass transfer member. The mass transfer component is designed and prepared on the basis of different pore uniformity, so that the ultralow emission of high-sulfur high-ash coal can be realized by a single-layer component, the height of the absorption tower is saved, and the consumption of steel plates is reduced. Compared with the arrangement of a plurality of layers of different mass transfer components, the material, the cost and the space are saved.
The beneficial technical effects of the heterogeneous boiling type foam desulfurization dust removal mass transfer component, the design method thereof and the desulfurization dust removal device at least comprise the following steps: 1) The ultralow emission of the high-sulfur high-ash coal is realized under the condition of not increasing the circulating amount of slurry, and the operation cost is low; 2) The module area is arranged according to the flow field of the unit, so that the desulfurization and dust removal effects are obvious, the pressure resistance is low, and the power of the booster fan is reduced, thereby reducing the operation cost; 3) The ultralow emission of the high-sulfur and high-ash coal can be realized by a single layer, the height of the absorption tower is saved, and the consumption of steel plates is reduced; 4) The flue gas flow field in the desulfurizing tower is more uniform, and the desulfurizing and dedusting efficiency is improved.
The invention is further illustrated by the following examples.
Example 1:
and setting a corresponding target flow field in the tower according to the required desulfurization and dust removal performance of the absorption tower.
A single layer of mass transfer members was provided in a simulated manner within the cross-section of the absorption column in which the mass transfer members were to be provided. The mass transfer member is substantially divided into a plurality of tiles each having an area of 2m 2 The square module area. Each module area is composed ofA plurality of identical squares with a side length of 35 mm. Each square is provided with a concentric circular through hole with the diameter of 32 mm. The initial pore uniformity of each module zone of the mass transfer member was 1. That is, initially, the circular through holes provided in all the squares are the same size.
And setting the liquid flow and the gas flow entering the absorption tower, and performing flow field simulation to obtain a flow field generated when the mass transfer component is used.
The simulated flow field is compared to the desired target flow field. If the deviation of the flow distribution of the simulated flow field and the target flow field at one module area is below 5%, the module area does not need to be adjusted. If the deviation between the flow distribution of the simulated flow field and the target flow field is more than 5% in one module area, the uniformity of the pores in the module area is reduced by 0.02, and the computer is used for calculating the corresponding mass transfer component structure after the uniformity of the pores is reduced. In this embodiment, as the pore uniformity decreases, the diameter of the circular via in one portion of the square region correspondingly decreases and the diameter of the other portion increases, but the average via coverage remains the same.
After conditioning, a flow field simulation is performed again to obtain the flow field that results when the conditioned mass transfer member is used.
The determination step is continued and the simulation and adjustment are repeated in this way until a flow field is obtained which is up to standard relative to the target flow field. Thus, mass transfer members with different pore uniformity in the module region are designed.
Example 2:
the mass transfer member data calculated in example 1 was introduced into the machine tool, and a mass transfer member was prepared. The mass transfer member is installed in the absorption column and passes liquid and gas streams in accordance with the set conditions. And measuring the desulfurization and dust removal performance of the absorption tower.
The results show that the absorption column equipped with the mass transfer member performs in accordance with the target expectations. By the modular design of the invention, the non-uniform flow field can be flexibly adjusted, and finally, the full removal of sulfur dioxide and dust in the flue gas is realized, thereby achieving the ultra-low emission target.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A boiling type foam desulfurization dust removal mass transfer component is a plate-shaped body and comprises a plurality of through holes extending along the thickness direction of the plate,
said mass transfer member comprising a plurality of modular zones in the plane of the plate, each modular zone consisting of a plurality of identical square zones, each of said through holes being in one square zone,
wherein pore uniformity of at least two of the plurality of module regions is different,
the pore uniformity for each module region is calculated by:
in the formula (I), X represents the pore uniformity of the module region, n represents the number of square regions in the module region and is an integer greater than 1, and epsilon i Represents the through hole coverage rate of the ith square area, epsilon represents the average through hole coverage rate in the module area, and the range of the pore uniformity is more than or equal to 0.85 and less than or equal to 0.95.
2. The mass transfer member of claim 1,
the side length a of the square area is 28mm to 42mm.
3. The mass transfer member of claim 1,
the area of each module area is 1m 2 To 2m 2 。
4. The mass transfer member of claim 1,
the thickness range of the plate-shaped body is 3mm to 5mm.
5. A mass transfer member according to claim 1,
the through holes are circular through holes concentric with the square areas.
6. A method of designing a bubbling froth desulfurization dust and mass transfer member of claim 1, characterized in that the method comprises the steps of:
step 1: a layer of mass transfer component is arranged in the absorption tower in a simulated manner;
step 2: carrying out simulation calculation on flow field distribution in the absorption tower;
and step 3: comparing the flow field obtained by the simulation calculation in the step 2 with a target flow field, finishing the design if the flow field reaches the standard, and performing the step 4 if the flow field does not reach the standard;
and 4, step 4: and (3) adjusting the pore uniformity of the module area of the flow field substandard area in a simulation mode, and then performing the step 2 again.
7. The method of claim 6,
in step 1, the pore uniformity of each module area of the mass transfer member in the layer set in a simulation mode is 1.
8. The method of claim 6,
in step 4, the average via coverage is set constant during the simulation tuning.
9. A desulfurization dust removal apparatus, characterized in that said desulfurization dust removal apparatus comprises:
a desulfurization absorption tower; and
only one mass transfer member disposed in said desulfurization absorption column, said mass transfer member being the mass transfer member of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111628534.5A CN114272702B (en) | 2021-12-28 | 2021-12-28 | Boiling type foam desulfurization dust removal mass transfer component, design method thereof and desulfurization dust removal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111628534.5A CN114272702B (en) | 2021-12-28 | 2021-12-28 | Boiling type foam desulfurization dust removal mass transfer component, design method thereof and desulfurization dust removal device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114272702A CN114272702A (en) | 2022-04-05 |
| CN114272702B true CN114272702B (en) | 2022-12-30 |
Family
ID=80877134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111628534.5A Active CN114272702B (en) | 2021-12-28 | 2021-12-28 | Boiling type foam desulfurization dust removal mass transfer component, design method thereof and desulfurization dust removal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114272702B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107403033A (en) * | 2017-06-27 | 2017-11-28 | 南京航空航天大学 | A kind of vertical radial stream adsorber structure optimization method |
| CN207478300U (en) * | 2017-10-25 | 2018-06-12 | 西安西热锅炉环保工程有限公司 | A kind of adjustable type desulfurization synergistic mass transfer apparatus |
| KR20180119125A (en) * | 2017-04-24 | 2018-11-01 | 주식회사 엘지화학 | Method for deciding the process conditions of removing volatile organic compounds from polymers |
| CN112337234A (en) * | 2020-10-06 | 2021-02-09 | 华中科技大学 | Whirl cutting formula tray structure and desulfurizing tower of desorption heavy metal pollutant |
| CN112675682A (en) * | 2020-12-16 | 2021-04-20 | 武汉立为工程技术有限公司 | Single-tower desulfurization ultra-clean treatment system and desulfurization process |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1096995A1 (en) * | 1998-05-29 | 2001-05-09 | Abb Lummus Global Inc. | Structured packing and element therefor |
| WO2002002998A1 (en) * | 2000-07-06 | 2002-01-10 | Thermagen Sa | Adsorption refrigerating device |
| KR100392408B1 (en) * | 2000-10-05 | 2003-07-22 | 학교법인 서강대학교 | Macroporous foams comprising microporous zeolite or zeotype material and preparation thereof by using polymeric templates having sponge structure |
| US7128775B2 (en) * | 2004-05-12 | 2006-10-31 | Praxair Technology, Inc. | Radial bed flow distributor for radial pressure adsorber vessel |
| US8449657B2 (en) * | 2009-01-16 | 2013-05-28 | University Of Cincinnati | Continuous droplet generator devices and methods |
| CN204582914U (en) * | 2015-05-07 | 2015-08-26 | 武汉凯迪电力环保有限公司 | The gas-liquid distributor that a kind of non-homogeneous perforate is arranged |
| CN105749734B (en) * | 2016-04-29 | 2018-06-22 | 中电投远达环保工程有限公司重庆科技分公司 | Adaptive boiling type foam desulfation dust-extraction device |
| CN108014620A (en) * | 2017-12-04 | 2018-05-11 | 重庆精创联合环保工程有限公司 | The integrated processing technique of flue gas minimum discharge |
| CN208320457U (en) * | 2018-04-18 | 2019-01-04 | 哈尔滨锅炉厂环保工程技术有限公司 | The single column double circulation desulphurization system of its device of sieve-board type gas-liquid part flow arrangement and application |
| WO2020083098A1 (en) * | 2018-10-22 | 2020-04-30 | 上海必修福企业管理有限公司 | Engine emission treatment system and method |
| CN110652807B (en) * | 2019-09-30 | 2021-03-30 | 四川大学 | Non-uniform film falling pipe, unit and device applied to falling film dust removal |
| CN111330417A (en) * | 2020-04-13 | 2020-06-26 | 华能国际电力股份有限公司 | Self-adaptive airflow adjusting and mass transfer enhancing device and method |
| CN112844016B (en) * | 2020-12-23 | 2022-12-09 | 河北大唐国际王滩发电有限责任公司 | Two-stage series tower type wet flue gas desulfurization device flow field optimization method |
-
2021
- 2021-12-28 CN CN202111628534.5A patent/CN114272702B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180119125A (en) * | 2017-04-24 | 2018-11-01 | 주식회사 엘지화학 | Method for deciding the process conditions of removing volatile organic compounds from polymers |
| CN107403033A (en) * | 2017-06-27 | 2017-11-28 | 南京航空航天大学 | A kind of vertical radial stream adsorber structure optimization method |
| CN207478300U (en) * | 2017-10-25 | 2018-06-12 | 西安西热锅炉环保工程有限公司 | A kind of adjustable type desulfurization synergistic mass transfer apparatus |
| CN112337234A (en) * | 2020-10-06 | 2021-02-09 | 华中科技大学 | Whirl cutting formula tray structure and desulfurizing tower of desorption heavy metal pollutant |
| CN112675682A (en) * | 2020-12-16 | 2021-04-20 | 武汉立为工程技术有限公司 | Single-tower desulfurization ultra-clean treatment system and desulfurization process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114272702A (en) | 2022-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204469533U (en) | A kind of fractional order reaction composite desulfate tower | |
| CN114272702B (en) | Boiling type foam desulfurization dust removal mass transfer component, design method thereof and desulfurization dust removal device | |
| EP1812132A1 (en) | Fluid distribution apparatus | |
| CN104307352A (en) | Efficient desulfurization purification efficiency improvement ring and in-tower efficiency improvement structure | |
| CN105148667A (en) | High-efficiency desulfuration and dedusting system for flue gas purification | |
| CN105749734B (en) | Adaptive boiling type foam desulfation dust-extraction device | |
| CN1496753A (en) | Flue-gas desulfurization system with stepped tray | |
| CN103998699A (en) | Access floor panel having intermingled directional and non-directional air passageways | |
| KR100652856B1 (en) | Exhaust gas processing device | |
| CN205850592U (en) | A kind of SCR denitration system flue gas duct uniforming device | |
| CN204601981U (en) | A kind of desulfurizing tower of configuring multi-layer pallet | |
| CN106039991A (en) | Method and apparatus for homogenizing SCR (selective catalytic reduction) denitration system flue flow field | |
| CN109482050B (en) | Moving bed flue gas purification device | |
| KR20190118890A (en) | Single channel pump for high efficiency and low fluid induced vibration with easy to change output | |
| EP2069618A1 (en) | Exhaust gas flow equalizer | |
| KR102229904B1 (en) | Perforated plate for semiconductor process to improve flow distribution | |
| SG178748A1 (en) | Exhaust gas desulfurizer | |
| CN201903261U (en) | Drying oven of glass fibre multilayer vibrating fluidized bed | |
| CN113909113B (en) | Method and system for accurately removing dust | |
| JP2506351B2 (en) | Desulfurization equipment | |
| KR100642520B1 (en) | High Efficiency Adsorption Air Dryer with First Guide Vane of Porosity Impinging Plate | |
| CN1303317A (en) | Structured packing and element therefor | |
| CN103687653A (en) | Urea reactor tray, reactor, and production process | |
| CN110180376B (en) | Dry type fixed bed desulfurization and denitrification device with annular bin | |
| CN102489141A (en) | Slurry collecting disc for spray type desulfurization absorption tower |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |