CN109224796B - Flue flow equalizer device and design method - Google Patents
Flue flow equalizer device and design method Download PDFInfo
- Publication number
- CN109224796B CN109224796B CN201811317918.3A CN201811317918A CN109224796B CN 109224796 B CN109224796 B CN 109224796B CN 201811317918 A CN201811317918 A CN 201811317918A CN 109224796 B CN109224796 B CN 109224796B
- Authority
- CN
- China
- Prior art keywords
- flow
- flue
- equalizer
- flow equalizer
- section
- 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
- 238000013461 design Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 23
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000003546 flue gas Substances 0.000 claims abstract description 55
- 238000004364 calculation method Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 5
- 229920002313 fluoropolymer Polymers 0.000 abstract description 5
- 238000004088 simulation Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000004904 shortening Methods 0.000 abstract description 2
- 238000011960 computer-aided design Methods 0.000 abstract 3
- 238000009826 distribution Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000000779 smoke Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000003009 desulfurizing effect Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000012717 electrostatic precipitator Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 239000012719 wet electrostatic precipitator Substances 0.000 description 2
- 125000000174 L-prolyl group Chemical group [H]N1C([H])([H])C([H])([H])C([H])([H])[C@@]1([H])C(*)=O 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J13/00—Fittings for chimneys or flues
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a flue flow equalizer device: the variable cross-section flue gas flow equalizer comprises a flow equalizer arranged in a variable cross-section flue, wherein a rectangular array consisting of flow equalizing holes is arranged on the flow equalizer, and the diameters of the flow equalizing holes on the flow equalizer are sequentially increased from the center position to the edge position of the flow equalizer; the invention also provides a design method of the flue flow equalizer device, which comprises the following steps: calculating and optimizing the structural parameters of the variable cross-section flue gas flow equalizer by adopting a three-dimensional simplified model of the flue and CAD (computer-aided design) fluid simulation software; furthermore, the invention adopts a three-dimensional flue simplified model, thereby greatly reducing the number of grids of the three-dimensional flue model, shortening the time consumed by CAD fluid simulation and accelerating the overall design speed; furthermore, the flow equalizer disclosed by the invention is made of a fluoroplastic material, has excellent material properties such as corrosion resistance and ash resistance, improves the running stability of the flow equalizer, and reduces the running and maintenance cost.
Description
Technical Field
The invention belongs to the technical field of low-temperature flue gas flow equalization in the thermal power generation industry, and particularly relates to a flue flow equalizer device and a design method thereof, namely a flue flow equalizer at an inlet variable cross-section flue of flue gas treatment equipment at the downstream of a desulfurization tower.
Background
9 months in 2014, national development and improvement committee, energy agency and environmental department jointly release coal and electricity energy conservation and emission reduction upgrading and improvement action plan (2014-2020), and the most severe standard in history is put forward for emission in the thermal power industry in China, namely 6% O2Under the condition, the smoke dust emission concentration is not higher than 10mg/Nm3. The national coal-fired power plants start ultra-low emission reconstruction, and the performance of the flue gas treatment equipment is comprehensively improved.
The mainstream technical route adopted by the flue gas treatment system of the coal-fired power plant in China is as follows: SCR (selective catalytic reduction) -ESP (electrostatic precipitator) -WFGD (wet desulfurization tower) -WESP (wet electrostatic precipitator)/WPTA (wet phase change coalescer). The concentration of the dust in the smoke at the WFGD outlet is generally difficult to meet the final emission requirement, and the low-dust smoke needs to be further purified by relying on WESP or WPTA, so that the guarantee of the working performance of the WESP or WPTA has important significance for guaranteeing the long-term stable standard of the smoke emission of a coal-fired power plant.
The flue between the WFGD outlet and the WESP or WPTA inlet is usually provided with a section of variable cross-section flue, and when the flue gas passes through the variable cross-section flue, the flow velocity distribution of the flue gas in the flue is not uniform under the condition of no flow equalizing device, so that the retention time of the flue gas in the WESP and the WPTA is influenced, and the working performance of the WEPS and the WPTA is reduced. Generally, the flow velocity of the central area of the flue is high, the flow velocity of the flue gas close to the wall surface of the flue is low, and the phenomenon of uneven distribution of the flow velocity of the flue gas is more obvious at the position of the variable cross section of the flue. Therefore, the development of the flue flow equalizer device and the design method under the high-humidity flue gas condition have very important significance.
At present, most of flue gas flow equalizing devices under the condition of high-humidity flue gas at the downstream of a desulfurizing tower are based on the principle of physical rectification, and the flow rates of the flue gas at different positions of the cross section of a flue are close to each other by installing resistance pieces in the flue in different forms. The devices are mostly made of metal materials, the flue gas humidity at the downstream of the desulfurizing tower is saturated, the corrosion resistance of the metal resistance part is uncertain, the corrosion prevention treatment cost is high, and meanwhile, the metal resistance part is troublesome to install and is inconvenient to overhaul and maintain.
Patent document CN 101476736a discloses a sharp turn flue flow equalizing device. The vertical flue is virtually divided into a front half part and a rear half part by utilizing a plurality of groups of guide vane grids, so that the longitudinal depth required for achieving a flow equalizing state after the flue gas turns sharply is reduced. The device equipment is simple, construction convenience, is applicable to the place that the flue gas flow direction has obvious change, can't play better flue gas effect of flow equalizing to the straight flue of variable cross section.
Patent document with granted publication number CN 204799414U discloses a flue gas uniform distribution device. The device forms a set of flue gas rectifying device through the rectifying grating, the support ring and the support beam, is used for flue gas flow equalization of a WESP inlet variable cross-section flue, adopts PP material to manufacture the rectifying grating, and can play a good anti-corrosion effect, but the method does not provide a general design method aiming at the structural parameters of the rectifying grating under different flue structural conditions, and has poor universality in practical engineering application occasions.
Patent document No. CN 205208586U discloses a variable cross-section flue flow equalizing plate. The method realizes the flue gas flow equalization of the variable cross-section flue by installing the splayed flow equalizing plate on the variable cross-section flue, the device is simple, the flow equalizing plate is made of steel plates, the flow equalizing plate cannot adapt to high-humidity flue gas at the downstream of a desulfurizing tower, the corrosion risk exists, meanwhile, a general design method is not provided, and the method has great limitation in the popularization and use process.
Accordingly, there is a need for improvements in the art.
Disclosure of Invention
The invention aims to provide an efficient flue flow equalizer device and a design method.
In order to solve the technical problem, the invention provides a flue flow equalizer device which comprises: comprises a flow equalizer arranged in a variable cross-section flue;
the flow equalizer is provided with a rectangular array consisting of flow equalizing holes, and the diameters of the flow equalizing holes on the flow equalizer are sequentially increased from the center position to the edge position of the flow equalizer.
As an improvement of the flue flow equalizer device of the invention:
the flow equalizing holes are uniformly distributed in the center of the flow equalizer, and one of the flow equalizing holes is positioned in the center of the flow equalizer.
The invention also provides a design method of the flue flow equalizer device, which comprises the following steps:
1) setting geometric structure parameters of the variable cross-section flue;
2) according to the symmetry of the variable cross-section flue, an ICEM software is utilized to construct a three-dimensional flue 1/4 simplified model;
3) artificially setting the initial limiting requirement of the flow equalizer, including setting the pressure drop delta P of the flue gas passing through the flow equalizer0And the flow area S of the given current equalizertFlow area StThe area of the added current equalizing holes of all the given current equalizers is obtained;
4) manually adjusting the structural parameters of the equalizing holes of the actual flow equalizer, wherein the structural parameters of the equalizing holes comprise the transverse spacing and the longitudinal spacing of a rectangular array formed by the equalizing holes and the diameter of the equalizing holes;
5) judging whether the flow area S of the actual current equalizer meets the flow area S of the given current equalizertThe requirements of (1): s is not less than St(ii) a If the requirement is not met, returning to the step 4); if the requirement is met, executing the step 6);
the flow area S of the actual current equalizer is the area obtained by adding the current equalizing holes of all the actual current equalizers;
6) constructing a 1/4 flow equalizer simplified model in a three-dimensional flue 1/4 simplified model by using ICEM software;
7) introducing a three-dimensional flue 1/4 simplified model and a 1/4 flow equalizer simplified model into software fluent19.0, calculating a flue gas flow field under the condition of selected parameters in a variable cross-section flue, and judging whether the flue pressure drop delta P meets the pressure drop delta P when flue gas passes through the flow equalizer or not0The requirements of (1): Δ P ≦ Δ P0(ii) a If the requirement is not met, returning to the step 4), and adjusting the structural parameters of the flow equalizing hole again; if the requirement is met, executing the step 8);
8) judging whether the standard deviation sigma of the flue gas flow velocity of the section of the rear flue of the flow equalizer meets the requirement:
wherein:
vithe flow rate of flue gas at the outlet of the ith flow equalizing hole is the same from near to far in the horizontal direction or the vertical direction from the center of the flow equalizer;
the average flow velocity of the flue gas passing through the flow equalizer; n is the total number of the flow equalizing holes from the center to the edge of the flow equalizer on the same straight line;
if the requirement is not met, returning to the step 4), and adjusting the structural parameters of the flow equalizing hole; if the requirements are met, the calculation is finished, d1、d2、d3……dn；x2、x3……xnThe design parameters of the structure of the current equalizer are met.
The technical advantages of the flue flow equalizer device and the design method are as follows:
the invention provides a design method for optimizing structural parameters of a variable cross-section flue gas flow equalizer, which adopts a three-dimensional simplified model of a flue and utilizes CAD fluid simulation software to calculate and optimize the structural parameters of the variable cross-section flue gas flow equalizer;
furthermore, the invention adopts a three-dimensional flue simplified model, thereby greatly reducing the number of grids of the three-dimensional flue model, shortening the time consumed by CAD fluid simulation and accelerating the overall design speed;
furthermore, the flow equalizer disclosed by the invention is made of a fluoroplastic material, has excellent material properties such as corrosion resistance and ash resistance, improves the running stability of the flow equalizer, and reduces the running and maintenance cost.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic cross-sectional view of a conventional variable cross-section flue;
FIG. 2 is a schematic view of a variable cross-section flue interface of the flue current equalizer apparatus of the present invention;
FIG. 3 is a schematic structural diagram of the current equalizer of FIG. 2;
FIG. 4 is a schematic view of a portion of the structure of FIG. 3;
FIG. 5 is a flow chart of the design method of the flue flow equalizer of the present invention.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto.
Example 1 a flue gas equalizer apparatus, as shown in fig. 1-5, comprises an equalizer 3 disposed in a variable cross-section flue,
The variable cross-section flue comprises a variable cross-section flue inlet section 1, a variable cross-section flue amplifying section 2 and a variable cross-section flue outlet section 4 which are sequentially connected, and the diameter of the variable cross-section flue inlet section 1 is smaller than that of the variable cross-section flue outlet section 4.
When the flow equalizer 3 is not arranged in the variable cross-section flue, the flue gas flow velocity distribution of the inlet section 1 of the variable cross-section flue is uniform, and after passing through the variable cross-section flue amplification section 2, the flue gas flow velocity distribution is greatly changed, so that the flue gas flow velocity distribution in the outlet section 4 of the variable cross-section flue is uneven, the flue gas flow velocity at the center of the flue is high, and the flue gas flow velocity close to the flue to avoid the position is low.
According to the invention, flue gas passes through the flow equalizer 3 at the joint of the variable cross-section flue amplification section 2 and the variable cross-section flue outlet section 4, and the flow velocity of the flue gas on the cross section of the variable cross-section flue outlet section 4 is uniformly distributed after the flue gas is rectified by the flow equalizer 3.
The shape of the flow equalizer 3 is matched with the shape of the cross section of the flue at the installation position, namely the periphery of the flow equalizer 3 is contacted with the inner side wall of the variable cross section flue, and the flow equalizer 3 is made of fluoroplastic materials. The flow equalizer 3 is provided with a rectangular array consisting of a plurality of flow equalizing holes 5 (the flow equalizing holes 5 are uniformly distributed in the center of the flow equalizer 3, one flow equalizing hole 5 is positioned in the center of the flow equalizer 3), the flow equalizing holes 5 are communicated with the inner cavity of the variable cross-section flue outlet section 4 and the inner cavity of the variable cross-section flue amplifying section 2, and the flue gas can only pass through the flow equalizer 3 from the flow equalizing holes 5.
The diameters of the flow equalizing holes 5 in the flow equalizing device 3 are sequentially increased from the center position to the edge position of the flow equalizing device 3, so that the uniform flow of the flue gas passing through the flow equalizing holes 5 can be ensured.
When the invention is used, the design method of the structure of the current equalizer 3 is shown in figure 5, and comprises the following steps:
d1、d2、d3……dnthe diameters x of the flow equalizing holes 5 with different sizes are arranged along the line from the center position to the edge position of the flow equalizer 32、x3……xnThe distance from the center of the flow equalizing hole 5 with different sizes to the center of the flow equalizer 3.
When the flue flow equalizer device is used, the design method of the structure of the flow equalizer 3 is shown in figure 5, and comprises the following steps:
the parameters in the variable cross-section flue are manually set (no change is caused after selection).
1) Preliminarily determining geometric structure parameters of the variable cross-section flue, wherein the geometric structure parameters of the variable cross-section flue comprise geometric structure sizes of a variable cross-section flue inlet section 1, a variable cross-section flue amplifying section 2 and a variable cross-section flue outlet section 4;
2) and constructing a three-dimensional flue 1/4 simplified model according to the symmetry of the variable cross-section flue: the full size flue was constructed using ICEM software. The construction 1/4 of the simplified model can reduce the calculation amount of the computer to the maximum extent and accelerate the calculation speed on the premise of ensuring the precision of the simulation result.
3) Artificially giving the initial limiting requirement of the flow equalizer 3, including setting the pressure drop delta of the flue gas passing through the flow equalizer 3P0And the flow area S of the given current equalizer 3t(flow area S)tThe area of all the flow equalizing holes 5 of a given flow equalizer 3 after addition);
4) manually adjusting the structural parameters of the flow equalizing holes 5 of the actual flow equalizer 3, wherein the structural parameters of the flow equalizing holes 5 comprise the transverse spacing and the longitudinal spacing of a rectangular array formed by the flow equalizing holes 5 and the diameter of the flow equalizing holes 5;
the diameters of the flow equalizing holes 5 from the center position of a given flow equalizer 3 to the edge position along the transverse direction or the vertical direction are adjusted to d1、d2、d3……dn(the diameter of the flow equalizing hole 5 at the center of the flow equalizer 3 is given as d1) (ii) a The distance from the center position of a given flow equalizer 3 to the center of the flow equalizing hole 5 at the edge position along the transverse direction or the vertical direction is adjusted to be x2、x3……xn(the distance between the flow equalizing hole 5 at the center of the flow equalizer 3 and the adjacent flow equalizing hole 5 is x2)；
5) Judging whether the flow area S of the actual current equalizer 3 (the flow area S is the area obtained by adding the equalizing holes 5 of all the actual current equalizers 3) meets the flow area S of the given current equalizer 3t：S≥St(ii) a If the requirement is not met, returning to the step 4), manually adjusting the structural parameters of the actual flow equalizing holes 3 again, thereby adjusting the number and the diameter of the flow equalizing holes 5 on the flow equalizer 3 and changing the flow area S of the actual flow equalizer 3; if the requirements are met, step 6) is executed.
6) Establishing a 1/4 flow equalizer 3 simplified model in a three-dimensional flue 1/4 simplified model by using ICEM software, and simulating a flue provided with an actual flow equalizer 3;
7) introducing a three-dimensional flue 1/4 simplified model and a 1/4 flow equalizer simplified model into commercial software fluent19.0, calculating a flue gas flow field under the condition of selected parameters in a manually-arranged variable cross-section flue, and judging whether the flue pressure drop delta P meets the pressure drop delta P when the flue gas passes through the flow equalizer 3 or not0：ΔP≤ΔP0(ii) a If the requirement is not met, returning to the step 4), and adjusting the structural parameters of the flow equalizing hole 3 again; if the requirement is met, executing the step 8);
8) judging whether the standard deviation sigma of the flue gas flow velocity of the section of the rear flue of the flow equalizer 3 meets the requirement: sigma/v is less than or equal to 0.05;
wherein:
vithe flow rate of the flue gas at the outlet of the ith flow equalizing hole 5 (the same ith flow equalizing hole 5 from the center of the flow equalizer 3 to the far side from the center in the horizontal direction or the vertical direction) in fig. 4 is shown, and n is the total number of the flow equalizing holes 5 from the center to the edge of the flow equalizer 3 on the same straight line.
If the requirement is not met, returning to the step 4), and adjusting the structural parameters of the flow equalizing hole 3; if the requirements are met, the calculation is finished, d1、d2、d3……dn；x2、x3……xnThe design parameters of the structure of the current equalizer are met.
The current equalizer obtained by the design method has the advantages of light weight, good current equalizing effect and long service life. Compared with the traditional metal flow equalizer, the service life of the fluoroplastic flow equalizer is 40 years on average and is 10 times longer than that of the metal flow equalizer; the mass of the fluoroplastic flow equalizer is light and is less than 1/20 of that of a metal flow equalizer; by adopting the structure of the flow equalizing hole 3, the standard deviation of the flue gas flow velocity after the flow equalizer is less than 5 percent.
The commercial computing software used in the invention is a fluent19.0 series, compared with low-version fluent software, the version has advantages in multiphase flow simulation and polyhedral mesh division functions, and can generate meshes with better quality and accelerate model computing speed; meanwhile, the smoke contains three phases of gas, liquid and solid, and the fluent19.0 has the advantage of multiphase flow simulation, so that the calculation accuracy of the method can be further improved. Imem is a professional CFD preprocessing software, comprises a geometric interface of mainstream design software such as CAD, SolidWorks, Pro/ENGINEER and the like, and can improve the quality of a structured grid and the preprocessing speed of a model by using a topological partitioning technology.
Finally, it is also noted that the above-mentioned lists merely illustrate a few specific embodiments of the invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (2)
1. The design method of the flue flow equalizer device is characterized in that:
the flue flow equalizer device comprises a flow equalizer (3) arranged in the variable cross-section flue;
the flow equalizer (3) is provided with a rectangular array consisting of flow equalizing holes (5), and the diameters of the flow equalizing holes (5) in the flow equalizer (3) are sequentially increased from the center position to the edge position of the flow equalizer (3);
the design method comprises the following steps:
1) setting geometric structure parameters of the variable cross-section flue;
2) according to the symmetry of the variable cross-section flue, an ICEM software is utilized to construct a three-dimensional flue 1/4 simplified model;
3) artificially giving the initial limiting requirement of the flow equalizer (3), including setting the pressure drop delta P when the flue gas passes through the flow equalizer (3)0And the flow area S of the given current equalizer (3)tFlow area StThe area of the flow equalizing holes (5) of all the given flow equalizers (3) is added;
4) manually adjusting the structural parameters of the current equalizing holes (5) of the actual current equalizer (3), wherein the structural parameters of the current equalizing holes (5) comprise the transverse spacing and the longitudinal spacing of a rectangular array formed by the current equalizing holes (5) and the diameter of the current equalizing holes (5);
5) judging whether the flow area S of the actual current equalizer (3) meets the flow area S of the given current equalizer (3)tThe requirements of (1): s is not less than St(ii) a If the requirement is not met, returning to the step 4); if the requirement is met, executing the step 6);
the flow area S of the actual flow equalizer (3) is the area obtained by adding the flow equalizing holes (5) of all the actual flow equalizers (3);
6) constructing a 1/4 flow equalizer (3) simplified model in a three-dimensional flue 1/4 simplified model by using ICEM software;
7) introducing a three-dimensional flue 1/4 simplified model and a 1/4 flow equalizer simplified model into the software fluent19.0, calculating a flue gas flow field under the condition of selected parameters in a variable cross-section flue, and judging whether the flue pressure drop delta P meets the requirement of flue gas passing through the equal flow equalizers or notPressure drop delta P in the flow channel (3)0The requirements of (1): Δ P ≦ Δ P0(ii) a If the requirement is not met, returning to the step 4), and adjusting the structural parameters of the flow equalizing hole (5) again; if the requirement is met, executing the step 8);
8) judging whether the standard deviation sigma of the flue gas flow velocity of the section of the rear flue of the flow equalizer (3) meets the requirement:
wherein:
vithe flow velocity of the flue gas at the outlet of the ith flow equalizing hole (5) is the same from near to far in the horizontal direction or the vertical direction from the center of the flow equalizer (3);
the average flow velocity of the flue gas passing through the flow equalizer (3); n is the total number of the flow equalizing holes (5) from the center to the edge of the flow equalizing device (3) on the same straight line;
if the requirement is not met, returning to the step 4), and adjusting the structural parameters of the flow equalizing hole (5); if the requirements are met, the calculation is finished, d1、d2、d3……dn；x2、x3……xnThe design parameters of the structure of the current equalizer are met.
2. The design method of the flue flow equalizer device of claim 1, wherein: the flow equalizing holes (5) are uniformly distributed in the center of the flow equalizing device (3), and one of the flow equalizing holes (5) is positioned in the center of the flow equalizing device (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811317918.3A CN109224796B (en) | 2018-11-07 | 2018-11-07 | Flue flow equalizer device and design method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811317918.3A CN109224796B (en) | 2018-11-07 | 2018-11-07 | Flue flow equalizer device and design method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109224796A CN109224796A (en) | 2019-01-18 |
| CN109224796B true CN109224796B (en) | 2021-02-26 |
Family
ID=65077117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811317918.3A Active CN109224796B (en) | 2018-11-07 | 2018-11-07 | Flue flow equalizer device and design method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109224796B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111023147B (en) * | 2019-12-21 | 2024-03-19 | 北京凯德石英股份有限公司 | Self-temperature-measuring spiral ignition chamber |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100483077B1 (en) * | 2002-10-28 | 2005-04-14 | 한국전력공사 | wet exhaust gas desulfurization apparatus be utilized an improved gas distribution plate |
| CN101992002A (en) * | 2009-08-11 | 2011-03-30 | 张文波 | Novel absorption tower |
| CN202590544U (en) * | 2012-03-27 | 2012-12-12 | 林刚 | Flow equalization plate for air purifying device |
| CN204601979U (en) * | 2015-05-13 | 2015-09-02 | 张国志 | Absorption tower current equalizer |
| CN204799414U (en) * | 2015-06-17 | 2015-11-25 | 林崇军 | Flue gas equipartition device |
| CN205208586U (en) * | 2015-10-30 | 2016-05-04 | 华西能源工业股份有限公司 | Variable cross section flue board that flow equalizes |
| CN105498971B (en) * | 2016-01-06 | 2018-02-09 | 上海超清环保科技有限公司 | Air flow method system applied to wet cottrell |
| CN206996851U (en) * | 2017-08-30 | 2018-02-13 | 西安热工研究院有限公司 | A kind of wet electrical dust precipitator inlet flue duct water conservancy diversion, current equalizer |
-
2018
- 2018-11-07 CN CN201811317918.3A patent/CN109224796B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109224796A (en) | 2019-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107198964A (en) | A kind of system and method for raising SCR flow field uniformities | |
| CN103235842B (en) | The acquisition methods of quadrangle tangential circle coal-fired boiler combustion characteristic and system | |
| CN106621804B (en) | Flue gas ammonia injection mixing device and SCR flue gas denitration system | |
| CN103927420B (en) | Method for optimizing gas-solid two-phase flow field and ammonia spraying of selective catalytic reduction denitration device | |
| CN108636102A (en) | A kind of online dynamic of denitration velocity field is adjustable commutation system and method | |
| CN111437721B (en) | Method for optimizing multi-working-condition performance of mixer of selective catalytic reduction denitration device | |
| CN103736394B (en) | A kind of SCR denitration device reducing flue deflector design method | |
| CN109224796B (en) | Flue flow equalizer device and design method | |
| CN208493824U (en) | A kind of SCR denitration spray ammonia distributor | |
| CN104307359B (en) | Equipment for denitrifying flue gas and its flow guide bar design method for disperseing fly ash granule | |
| CN203507792U (en) | Synchronous desulfurization and denitrification tower | |
| CN112121629A (en) | Segmented flow guide plate, flue gas on-line adjusting and flow equalizing device and flow equalizing method | |
| CN105797582B (en) | A kind of the differentiation spray ammonia reactor and spray ammonia method of SCR denitration | |
| CN205164507U (en) | Flue gas denitration flue guide plate device | |
| CN205208586U (en) | Variable cross section flue board that flow equalizes | |
| CN109472389B (en) | Multi-working-condition intelligent optimization method for impeller with medium and low specific speed | |
| CN109579567A (en) | Adaptive resistance fluoroplastics condensate device and design method | |
| CN111539153B (en) | Water-sand joint optimization scheduling method based on preconfigured sediment information base | |
| CN115809617A (en) | Inlet water flow channel optimization method based on outlet non-uniform flow and highest efficiency of pump device | |
| CN111931263B (en) | Constant flow simulation method based on optimized solution of planar two-dimensional shallow water equation | |
| CN206837859U (en) | A kind of efficient SCR reactors of low dirt | |
| Wang et al. | The simulation and optimization of flow field in the low temperature scr reactor | |
| CN112100932B (en) | Numerical simulation method and system for industrial pipeline vibration and blockage problems | |
| CN114288847B (en) | SCR denitration device with uniform flue gas flow field flow velocity and ammonia concentration distribution | |
| Wu et al. | Layout of measuring points for flue gas flow velocity in coal-fired power plants based on CFD technology |
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 | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240611 Address after: Room 002, Building A, Qinhan Innovation Center, Yaodian Street Office, Qinhan New City, Xixian New District, Xianyang City, Shaanxi Province, 710075 Patentee after: Shaanxi Derun Houze Environmental Technology Co.,Ltd. Country or region after: China Address before: 5 / F, block a, Jiangning building, 328 Wenming Road, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee before: RESEARCH INSTITUTE OF XI'AN JIAOTONG University ZHEJIANG Country or region before: China |