CN105879645A - Turbulent tube grid tower capable of improving desulfurization efficiency - Google Patents
Turbulent tube grid tower capable of improving desulfurization efficiency Download PDFInfo
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- CN105879645A CN105879645A CN201510316288.8A CN201510316288A CN105879645A CN 105879645 A CN105879645 A CN 105879645A CN 201510316288 A CN201510316288 A CN 201510316288A CN 105879645 A CN105879645 A CN 105879645A
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Abstract
The invention provides a turbulent tube grid tower capable of improving the desulfurization efficiency. A flue gas flow field is uniformly distributed by additionally arranging a tube grid structure, spray slurry is uniformly distributed, a slurry holding layer is formed on the upper portion of the device to increase the gas-liquid contact area, and therefore the desulfurization efficiency is improved. Meanwhile, the slurry holding layer also can play a certain dust removal role. In addition, compared with a tray tower and a spiral gathering coupling tower, the turbulent tube grid tower has the advantages that the structure is simple, the manufacturing technology is simplified, the resistance is greatly reduced, the production and operation cost is reduced, and overhauling and maintaining are convenient. According to the technical scheme, the turbulent tube grid tower capable of improving the desulfurization efficiency comprises a tower body, a flue gas inlet and a spray layer; the tube grid structure is arranged between the flue gas inlet and the spray layer and comprises at least two layer of tube columns which are arranged in parallel in a layered mode; each tube column comprises a plurality of tubes which are arranged in parallel; projection of any one tube does not coincide with or partially coincide with projection of the tubes in the tube column adjacent to the tube column where the tube is located in the perpendicular direction.
Description
Technical field
The present invention relates to environmental technology field, particularly relate to wet process of FGD equipment, be specifically related to a kind of desulfuration efficiency that improves
Turbulent pipe grid tower.
Background technology
" coal electricity energy-saving and emission-reduction upgrading with transformation action plan (2014-2020) " require eastern region (Liaoning, Beijing, Tianjin,
11 provinces and cities such as Hebei, Shandong, Shanghai, Jiangsu, Zhejiang, Fujian, Guangdong, Hainan) newly-built Thermal generation unit atmospheric pollution
Thing concentration of emission basically reach gas turbine group emission limit (i.e. under the conditions of benchmark oxygen content 6%, flue dust, sulfur dioxide, nitrogen
Emissions of oxides concentration is respectively no higher than 10,35,50 milligrams/cubic metre), middle part (Heilungkiang, Jilin, Shanxi,
8 provinces such as Anhui, Hubei, Hunan, Henan, Jiangxi) new-built unit in principle close to or up gas turbine group emission limit,
Encourage west area new-built unit close to or up gas turbine group emission limit.To the year two thousand twenty, eastern region active service 300,000 thousand
Watt and above public Thermal generation unit, 100,000 kilowatts and above provide Thermal generation unit and other coal fired power generations with good conditionsi for oneself
Unit, after transformation, Air Pollutant Emission concentration basically reaches gas turbine group emission limit.
At present in the case of ature of coal condition deviation, the desulfuration efficiency of single column single cycle desulfurizing tower is extremely difficult to the new of national environmental protection portion
Standard-required.
In order to improve desulfuration efficiency, prior art much uses the pallet tower of Ba Wei company.Pallet tower rises the porous of turbulent flow
The manufacturing process of pallet apparatus is extremely complex, and its device raw material selection is expensive high-strength alloy material, and owing to they are many
The feature in hole, causes pallet easily to block, once blocks, and the flow field in whole absorption tower can become more uneven, with
The liquid flux of Shi Zengjia not blocking portion, and then cause more serious blocking, need maintenance down the most in some cases.
Additionally the device resistance of pallet tower is the biggest, needs to be equipped with powerful aerator or air-introduced machine, thus the requirement of strength to pipeline
The highest, so, operation cost can be greatly increased.
Another is used rotation converge coupled by more, this rotation converge coupled equally exist that manufacturing process is complicated, cleaning difficulty,
Resistance is relatively big and make, problem that operation cost is higher, and rotation converges coupled and needs to reach preferable desulfurized effect, needs basis
Working environment carries out substantial amounts of calculating to adjust the angle of inclination of spiral board, dimensions and arrangement etc., once working environment
Change, the desulfuration efficiency of rotation remittance coupled has been had to be possible to reduce.
Summary of the invention
The problem existed for above-mentioned prior art, it is an object of the invention to provide a kind of turbulent pipe grid tower improving desulfuration efficiency.
By increasing the pipe uniform flue gas flow field of grid structure, uniform sprayed slurry, and on device top, liquid layer is held in formation, increases gas-to-liquid contact
Area, thus improve desulfuration efficiency.Meanwhile, hold liquid layer described in and may also function as certain dustproof function.And compared to pallet tower and
Revolving remittance coupled, the simple in construction of the present invention, manufacturing process is also simplified, and resistance is greatly reduced, and decreases production and fortune
Battalion's cost.It addition, the most conveniently carry out repair and maintenance.
To achieve these goals, the present invention adopts the technical scheme that:
A kind of turbulent pipe grid tower improving desulfuration efficiency, including tower body, smoke inlet and spraying layer；
Being disposed with a pipe grid structure between smoke inlet and spraying layer, at least two-layer pipe including parallel layered arrangement arranges；
Described pipe row include the some pipes being arranged in parallel；Pipe in the adjacent tubes row of pipe row belonging to any one Guan Yuqi is vertically
Projection on direction is without overlapping or partially overlapping.
Preferably, described pipe grid structure includes the two-layer pipe row of layered arrangement, the wherein pipe in pipe row and the pipe of another Guan Liezhong
Intermesh parallel.
Preferably, described pipe grid structure includes the two-layer pipe row of layered arrangement, the wherein pipe in pipe row and the pipe of another Guan Liezhong
In the vertical direction projection between there is the angle of 90-150 °.
Preferably, described pipe grid structure includes the two-layer pipe row of layered arrangement, the wherein pipe in pipe row and the pipe of another Guan Liezhong
The projection of in the vertical direction orthogonal.
Preferably, described in any layer, the porosity of the shared tower body cross section of pipe row is between 0.3～0.6.
Preferably, the horizontal spacing of the pipe of same Guan Liezhong is 0.5-2.0 times of caliber, the vertical interval of the pipe in adjacent tubes row
For caliber 1-2 times.
Preferably, described pipe grid structure is installed on above described smoke inlet at 1.5-4 rice.
Preferably, described pipe be outer diameter be the pipe of Φ 45-100mm.
Preferably, described pipe be the short axle of outer wall be 30-70mm, ellipticity is the elliptical tube of 0.4-0.7.
Preferably, the material of described pipe is selected from steel alloy, plastics, carbon steel lining anti-corrosion material.
By taking technique scheme, can be selected for standard size pipe or elliptical tube is combined into the arrangement mode of needs, processing system
Make technique simple, blockage problem is also effectively improved, and the structure of the runner that alternately circulates formed between turbulent pipe grid device
Compare sieve plate aperture and the spiral board of rotation remittance coupled of pallet tower, can effectively reduce device resistance.
To sum up, the present invention has device simply, does not increase the features such as additional floor space, operating cost is low, maintenance management is convenient,
There is high application value.Compared to prior art, the turbulent pipe grid tower that the present invention proposes is before reaching effect same
Putting, technique is simpler, and energy consumption is lower, safeguards more convenient.
Accompanying drawing explanation
Fig. 1 be the present invention turbulent pipe grid tower in one embodiment structure composition schematic diagram.
Fig. 2 is the sectional view in A-A direction in Fig. 1.
Fig. 3 be the present invention turbulent pipe grid tower in another embodiment partial structurtes composition schematic diagram.
Fig. 4 is the sectional view in B-B direction in Fig. 3.
Fig. 5 be the present invention turbulent pipe grid tower in another embodiment partial structurtes composition schematic diagram.
Fig. 6 is the sectional view in C-C direction in Fig. 5.
Fig. 7 is the speed cloud atlas in the turbulent pipe grid tower Fluent flow field simulation in one embodiment of the present invention.
Fig. 8 is the speed vector figure in the turbulent pipe grid tower Fluent flow field simulation in one embodiment of the present invention.
Fig. 9 is the speed adjusted after arrangement pitch in the turbulent pipe grid tower Fluent flow field simulation in one embodiment of the present invention
Cloud atlas.
Figure 10 is the speed adjusted after arrangement pitch in the turbulent pipe grid tower Fluent flow field simulation in one embodiment of the present invention
Degree vectogram.
Figure 11 is the speed cloud atlas in the turbulent pipe grid tower Fluent flow field simulation in another embodiment of the present invention.
Figure 12 is the speed vector figure in the turbulent pipe grid tower Fluent flow field simulation in another embodiment of the present invention.
Figure 13 is the speed cloud atlas in the turbulent pipe grid tower Fluent flow field simulation in another embodiment of the present invention.
Figure 14 is the speed vector figure in the turbulent pipe grid tower Fluent flow field simulation in another embodiment of the present invention.
Figure 15 be in the turbulent pipe grid tower Fluent flow field simulation in another embodiment of the present invention adjust arrangement pitch after
Speed cloud atlas.
Figure 16 be in the turbulent pipe grid tower Fluent flow field simulation in another embodiment of the present invention adjust arrangement pitch after
Speed vector figure.
Description of reference numerals: 1-pipe grid structure；2-smoke inlet；3-spraying layer；4-demister；5-exhanst gas outlet.
Detailed description of the invention
First the operation principle of the present invention is introduced:
The turbulent pipe grid tower improving desulfuration efficiency of the present invention installs turbulent pipe grid additional above smoke inlet and between ground floor spraying layer
Structure, in carrying out wet process of FGD processing procedure, lime stone slurry is sprayed onto pipe grid knot by the nozzle of turbulent pipe grid superstructure
Above structure pipe row on, flue gas from below below pipe grid structure pipe row enter pipe grid structure, through the rectification of pipe grid structure
After, then with lime stone slurry contact mass transfer, absorb SO2, after discharged by exhanst gas outlet after demister.
The turbulent pipe grid tower of the present invention can improve the concrete reason of desulfuration efficiency and be described as follows:
The most generally, flue gas is (malleation negative pressure is typically provided by aerator or air-introduced machine) under malleation or suction function, by
Smoke inlet side enters and flows up, and the gas nonunf ormity of flue gas is very big, can produce the biggest vortex, be to cause
The major reason of desulfuration efficiency underground.After installing pipe grid structure, flue gas is able to rectification by pipe grid structure from the bottom to top so that it is
Tower body internal flow is uniform, it is to avoid bias current and short circuit phenomenon occurs in smoke inlet, and uniformly through the spray district in tower body, makes
Sweetening process is carried out when more stable.
2. flue gas is through pipe grid structure, and the runner of the alternately circulation that can be formed at interbank alternating contractions and expansion, in tube bank
Between produce strong turbulent flow and eddy current effect, enhance the flue gas disturbance to serosity, improve gas Liquid Mass Transfer Coefficient, make flue gas with
Slurry liquid contacts is more abundant, so that desulfuration efficiency is improved.
3. in running, lower section the high velocity air that the flue gas stream risen produces after pipe grid structure can be by bigger
Slurry droplet is pulverized, and produces at pipe grid superstructure and holds liquid layer, and holding liquid in liquid layer is continuous phase, and gas is dispersion phase, greatly
Increase gas-liquid mass transfer area, effectively reduce liquid-gas ratio.
The key point of the present invention is that device uses circle or oval ducts to be raw material, is combined into according to simulated flow pattern calculated permutations
Turbulent pipe grid device, low cost, processing technique is simple, easily promotes realization.
Features described above and advantage for making the present invention can become apparent, special embodiment below, and coordinate institute's accompanying drawing to make specifically
Bright as follows.
Embodiment 1:
As it is shown in figure 1, the turbulent pipe grid tower improving desulfuration efficiency of the present invention, including smoke inlet 2, spraying layer 3, demister
4 and exhanst gas outlet 5；Pipe grid structure 1 it is disposed with, including parallel layered arrangement at least between smoke inlet 2 and spraying layer 3
Two-layer pipe arranges；Described pipe row include the some pipes being arranged in parallel；Pipe in the adjacent tubes row of pipe row belonging to any one Guan Yuqi
The projection of in the vertical direction is without overlapping or partially overlapping.Pipe grid structure 1 is installed on 1.5-2.5 rice above described smoke inlet 2
Place.Between smoke inlet and described spraying layer, vertical dimension is 3-5 rice.And revolve swirl-flow devices oneself height in remittance coupled and i.e. exist
About 2 meters, thus relatively big with ground floor spray pitch requirements to smoke inlet, at least need 4 meters to ensure enough installation sites.
Therefore, converging with rotation compared with coupled, the tower body height of the turbulent pipe grid of the present invention can reduce, and not only reduces manufacture and installs
Cost, it is also possible to reduce and repair the difficulty and danger safeguarded.
Wherein, can directly find out from Fig. 1 and Fig. 2, pipe is classified as two-layer, wherein the pipe in pipe row and the pipe of another Guan Liezhong
Intermesh parallel.Pipe is pipe, the general standard tubing selecting outer diameter to be Φ 45-100mm.The material of tubing is selected from closing
Jin Gang, plastics, carbon steel lining anti-corrosion material etc..
Calculating according to simulated flow pattern, result shows, the porosity of one layer of shared tower body cross section of described pipe row is between 0.3～0.6,
The horizontal spacing of the pipe of same Guan Liezhong is the 1-2 that vertical interval is caliber of the pipe in 0.5-2.0 times of caliber and adjacent tubes row
Times time be obtained in that optimal desulfurization synergistic effect, it is as follows that concrete simulated flow pattern calculates process:
Utilize Fluent flow field simulation software, the flue gas flow field situation under different porosities arrangement form be simulated, it can be seen that
During mode arranged as described above, the turbulence effects between pipe row is optimal, uniform better to flue gas, can increase gas-liquid mixed effect
And increasing the time of staying, analog result is as follows.
A) arrangement parameter: caliber 65mm, horizontal spacing 115mm, horizontal spacing: longitudinal pitch=1:0.5；Its speed cloud atlas
And speed vector figure is as shown in Figure 7, Figure 8.
B) arrangement parameter: caliber 65mm, horizontal spacing 115mm, horizontal spacing: longitudinal pitch=1:0.9；Its speed cloud atlas
And speed vector figure is as shown in Figure 9, Figure 10.
Embodiment 2:
As shown in Figures 3 and 4, doing some and adjust on the basis of embodiment 1, wherein the pipe in pipe row arranges with another pipe
In pipe vertical direction on projection orthogonal.Being calculated by simulated flow pattern and show, the tube space in adjacent tubes row is arranged vertically
It is obtained in that preferably desulfurized effect equally.It is as follows that concrete simulated flow pattern calculates process:
Utilize Fluent flow field simulation software, the flue gas flow field situation under different porosities arrangement form be simulated, it can be seen that
Also preferable turbulence effects is can get when being arranged vertically between pipe row, visibly homogeneous by flue gas flow field after device, can preferably keep away
The problem exempting from sticking wall flow.
A) arrangement parameter: caliber is 65mm, horizontal spacing is fixed as 115mm, horizontal spacing: longitudinal pitch=1:0.8；Its
Speed cloud atlas and speed vector figure are as shown in Figure 11, Figure 12.
Embodiment 3:
As shown in Figures 5 and 6, it is 30-70mm that the pipe of Guan Liezhong also can be selected for the short axle of outer wall, and ellipticity is the ellipse of 0.4-0.7
Pipe, the pipe in pipe row intermeshes parallel with the pipe of another Guan Liezhong simultaneously.It is as follows that concrete simulated flow pattern calculates process:
Utilize Fluent flow field simulation software, the flue gas flow field situation under different porosities arrangement form be simulated, it can be seen that
When using elliptical tube, can increase width of flow path between pipe, between pipe, turbulent range increases, and can suitably reduce flow velocity between pipe, reduces
The air-flow impact to pipe fitting.
A) arrangement parameter: elliptical tube a size of 84*65mm, horizontal spacing 114mm, longitudinal pitch 100mm；Its speed cloud
Figure and speed vector figure are as shown in Figure 13, Figure 14.
B) arrangement parameter: elliptical tube a size of 84*56mm, horizontal spacing 114mm, longitudinal pitch 110mm；Its speed cloud
Figure and speed vector figure are as shown in Figure 15, Figure 16.
Can be illustrated by above example, use the structure of turbulent pipe grid tower of the present invention, it is possible to greatly improve desulfuration efficiency.
Certainly, above-described embodiment is only the relatively good implementation that technical scheme is described, the present invention is not limited thereto, actual
On, the pipe row number of plies is at least two-layer, according to the actual needs, after being simulated Flow Field Calculation, and can be in conjunction with cost consideration
The pipe row of more number of plies are installed.The arrangement mode of pipe row is the most not only limited with above-described embodiment, and the pipe in adjacent tubes row is all right
Arranged crosswise, the angle between its projection can be arbitrarily between 90-150 °.
Below by the analysis to concrete equipment operating data and effect, illustrate that the present invention, compared with similar technique, is had
Superior part.
1., compared with the turbulent pipe grid tower of the present invention converges coupled with the pallet tower of prior art, rotation, the flow field in tower can be made equally
Distribution more they tend to homogenization, counteract that some Imported is uneven and the adverse effect of whirlpool stream field, thus increase substantially desulfurization
Efficiency.Test at Zhejiang University 10000Nm3/h desulfurization pilot scale platform, stream in liquid-gas ratio 12, serosity pH=5.8, tower
Test in the case of speed 3.7m/s, regulate entrance SO2Concentration.It is demonstrated experimentally that SO2Entrance concentration is 2700mg/Nm3Time,
The desulfuration efficiency of the present invention up to 99.96%；Entrance SO2Concentration is less than 3600mg/Nm3Time, it is ensured that desulfuration efficiency is 99.5
More than %, exports SO2Concentration≤15mg/Nm3。SO2Entrance concentration is 6000mg/Nm3Time, SO2Exit concentration is also below 35mg/Nm3,
Desulfuration efficiency reaches 99.4%.
And compare, the structure of the present invention is the most simpler, manufactures and mounting process greatly simplifies, and manufactures and runs
Cost is substantially reduced, and carry out overhauling and safeguard the most convenient.
2., under reaching identical turbulence effects premise, the turbulent pipe grid tower of the present invention converges with the pallet tower of prior art and rotation and couples
Tower is compared, and resistance substantially reduces.
As a example by certain 600MW coal unit of current actual motion, desulphurization system oepration at full load, when opening three layers of spray, dress
Put resistance and be only 250-300Pa.And at present the most commercially available rotation converges coupled, reach identical put forward effect effect time, resistance
Power increases to 1000Pa.
3., when carrying out spraying layer maintenance, directly can build inspection platform in pipe grid structure.System carries out light maintenance, in tower body
In the case of serosity does not empties, maintainer just can enter in tower, checks, clears up anticorrosion situation in spraying layer, nozzle and tower,
Maintenance and Repair are convenient.
4., it addition, opposing tray tower and rotation converge for coupled, the turbulent pipe grid tower of present invention scope on material selects is wider,
Contributing to reducing production cost, rustless steel, steel alloy, plastics, carbon steel serve as a contrast the standard tubing of the materials such as anti-corrosion material and all can be selected for,
And typically pallet tower and rotation remittance coupled can only select the high-strength alloy material that cost is higher.
5. turbulent pipe grid tower has good mass transfer effect, such that it is able to reduce the spray number of plies and stock tank height, makes the height on absorption tower
Degree reduces, tower body weight saving, and anticorrosion area reduces, and reduces the integrated costs such as investment and operating maintenance further.At equal stream
In the case of speed, will reach identical desulfurized effect, turbulent pipe grid tower aspect ratio spray void tower is low 4 meters, than eddy flow tower low 2 meters with
On.
Claims (10)
1. improve a turbulent pipe grid tower for desulfuration efficiency, including tower body, smoke inlet and spraying layer；It is characterized in that,
Being disposed with a pipe grid structure between smoke inlet and spraying layer, at least two-layer pipe including parallel layered arrangement arranges；
Described pipe row include the some pipes being arranged in parallel；Pipe in the adjacent tubes row of pipe row belonging to any one Guan Yuqi is vertically
Projection on direction is without overlapping or partially overlapping.
2. the turbulent pipe grid tower improving desulfuration efficiency as claimed in claim 1, it is characterised in that described pipe grid structure includes layering
The two-layer pipe row arranged, wherein the pipe in pipe row intermeshes parallel with the pipe of another Guan Liezhong.
3. the turbulent pipe grid tower improving desulfuration efficiency as claimed in claim 1, it is characterised in that described pipe grid structure includes layering
The two-layer pipe row arranged, wherein have between the projection of the in the vertical direction of the pipe of the pipe in pipe row and another Guan Liezhong
The angle of 90-150 °.
4. the turbulent pipe grid tower improving desulfuration efficiency as claimed in claim 3, it is characterised in that described pipe grid structure includes layering
The two-layer pipe row arranged, wherein the pipe in pipe row is orthogonal with the projection of the in the vertical direction of the pipe of another Guan Liezhong.
5. the turbulent pipe grid tower improving desulfuration efficiency as claimed in claim 1, it is characterised in that the shared tower of pipe row described in any layer
The porosity of body cross section is between 0.3～0.6.
6. the as claimed in claim 1 turbulent pipe grid tower improving desulfuration efficiency, it is characterised in that the pipe of same Guan Liezhong horizontal
Spacing is 0.5-2.0 times of caliber, 1-2 times that vertical interval is caliber of the pipe in adjacent tubes row.
7. the turbulent pipe grid tower improving desulfuration efficiency as claimed in claim 1, it is characterised in that described pipe grid structure is installed on institute
State above smoke inlet at 1.5-4 rice.
8. the turbulent pipe grid tower improving desulfuration efficiency as claimed in claim 1, it is characterised in that described pipe is that outer diameter is
The pipe of 45-100mm.
9. the turbulent pipe grid tower improving desulfuration efficiency as claimed in claim 1, it is characterised in that described pipe is that the short axle of outer wall is
30-70mm, ellipticity is the elliptical tube of 0.4-0.7.
10. the turbulent pipe grid tower improving desulfuration efficiency as claimed in claim 1, it is characterised in that the material of described pipe is selected from alloy
Steel, plastics, carbon steel lining anti-corrosion material.
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| CN201420331024 | 2014-06-18 | ||
| CN2014203310240 | 2014-06-18 |
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| CN106669407A (en) * | 2017-01-22 | 2017-05-17 | 大唐环境产业集团股份有限公司 | Turbulence device with multi-layered elliptical rods |
| CN106861408A (en) * | 2017-03-13 | 2017-06-20 | 大唐环境产业集团股份有限公司 | Desulfurization demisting integration absorption tower |
| CN106955586A (en) * | 2017-03-03 | 2017-07-18 | 大唐环境产业集团股份有限公司 | A kind of minimum discharge processing system of the multi-pollutant Collaborative Control of coal-fired flue-gas |
| CN109821403A (en) * | 2019-02-27 | 2019-05-31 | 天津市可帮化工产品有限公司 | The paint mist treatment equipment that a kind of cascade and photodissociation combine |
| CN109821406A (en) * | 2019-02-27 | 2019-05-31 | 天津市可帮化工产品有限公司 | A kind of absorption-photodissociation integral waste gases processing equipment |
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| CN106861408A (en) * | 2017-03-13 | 2017-06-20 | 大唐环境产业集团股份有限公司 | Desulfurization demisting integration absorption tower |
| CN109821403A (en) * | 2019-02-27 | 2019-05-31 | 天津市可帮化工产品有限公司 | The paint mist treatment equipment that a kind of cascade and photodissociation combine |
| CN109821406A (en) * | 2019-02-27 | 2019-05-31 | 天津市可帮化工产品有限公司 | A kind of absorption-photodissociation integral waste gases processing equipment |
| CN109821407A (en) * | 2019-02-27 | 2019-05-31 | 天津市可帮化工产品有限公司 | A kind of bilayer charcoal absorption organic waste gas treatment equipment |
| CN109847577A (en) * | 2019-02-27 | 2019-06-07 | 天津市可帮化工产品有限公司 | A kind of plasma and charcoal adsorb the off-gas cleaning equipment combined |
| CN114177761A (en) * | 2022-02-16 | 2022-03-15 | 浙江百能科技有限公司 | Ultralow emission system and method for hazardous waste incineration flue gas pollutants |
| CN114177760A (en) * | 2022-02-16 | 2022-03-15 | 浙江百能科技有限公司 | System and method for oxidizing active oxygen in hazardous waste incineration flue gas and integrally discharging hazardous waste incineration flue gas in ultralow emission mode |
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Application publication date: 20160824 |
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