CN204502785U - A kind of flue gas device for deep cleaning for efficient desulfurizing and dust collecting - Google Patents
A kind of flue gas device for deep cleaning for efficient desulfurizing and dust collecting Download PDFInfo
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- CN204502785U CN204502785U CN201520156073.XU CN201520156073U CN204502785U CN 204502785 U CN204502785 U CN 204502785U CN 201520156073 U CN201520156073 U CN 201520156073U CN 204502785 U CN204502785 U CN 204502785U
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Abstract
The utility model relates to a kind of flue gas device for deep cleaning for efficient desulfurizing and dust collecting, comprise absorption tower, establish slurry pool in absorption tower and be positioned at the smoke absorption district above slurry pool, at smoke inlet, place establishes circulating slurry sprinkling device, with dividing plate, smoke absorption is separated into the first uptake zone and the second uptake zone being positioned at the first side, uptake zone, the flue gas reentrant pathway being flowed to the second uptake zone by the first uptake zone is established between dividing plate and slurry pool, the first slurries spraying layer is established in first uptake zone, the second slurries spraying layer is established in second uptake zone, first slurries spraying layer, second slurries spraying layer is all connected with slurry pool by slurry circulating pump with circulating slurry sprinkling device, demister is established successively from bottom to top above second slurries spraying layer, deduster and exhanst gas outlet.This device achieves the deep purifying of flue gas desulfurization and dedusting an equipment inter-sync, reduces the height on absorption tower, decreases the resistance of flow of flue gas, has saved expenditure of construction, reduces its operating cost.
Description
Technical field
The utility model relates to a kind of flue gas device for deep cleaning for desulfurization and dedusting.
Background technology
Along with China's expanding economy, environmental pollution is also day by day serious, large area haze weather happens occasionally, in order to environmental protect, at present, international and domestic flue gas desulfurization technique more than 80% adopts lime stone-gypsum wet sulfur removal technology, smoke limestone-gypsum wet sulfur removal technology generally adopts single absorption tower, along with improving constantly of environmental requirement, in the coal-fired plant flue gas that China requires developed area and some groups of cities, pollutant emission limit reaches the emission request of gas turbine group, i.e. so-called " ultra-clean discharge ", require NOx concentration≤50mg/Nm in discharge flue gas
3, SO
2concentration≤35mg/Nm
3, dust concentration≤5mg/Nm
3.The requirement new according to this, many coal-burning power plants practical sulphur removal efficiency should reach more than 99%, adopts single tower process to be in the past difficult to meet this new demand.Therefore, double tower double-cycle process and single tower double-cycle process have been there is now.Wherein double tower double-cycle process is exactly that behind second absorption tower, install the technique of wet electrical dust precipitator additional, this technique flue is complicated, and flue gas resistance is large, and floor space is large, runs power consumption high by two absorption tower series connection.Single tower double-cycle process is the bicirculating variation of double tower in fact, exactly the spraying layer of two towers is superimposed with lower layout, establish between tower and the spraying layer of tower and connect liquid pallet, the spray liquid on an absorption tower is made not to be sprayed in next absorption tower, the stock tank on absorption tower, top is arranged in outside absorption tower, the shortcoming of this technique is that absorption tower is very high, wet electrical dust precipitator cannot be installed additional more above, wet electrical dust precipitator can only be horizontally disposed, add the complexity of flue, increase flue gas resistance, there are two slurry pools, run and control complexity, operating cost is high, investment cost is high.
Utility model content
The technical problem that the utility model solves is, simplifies the flue gas processing device of desulfurization and dedusting, uses the Two-way Cycle absorption that a smoke absorption tower synchronously can realize flue gas, the height removing subparticle flue dust, reduce absorption tower.
The technical solution of the utility model is, a kind of flue gas processing device for desulfurization and dedusting is provided, comprise absorption tower, establish slurry pool in absorption tower and be positioned at the smoke absorption district above slurry pool, at smoke inlet, place establishes circulating slurry sprinkling device, with dividing plate, smoke absorption is separated into the first uptake zone and the second uptake zone being positioned at the first side, uptake zone, the flue gas reentrant pathway being flowed to the second uptake zone by the first uptake zone is established between dividing plate and slurry pool, the first slurries spraying layer is established in first uptake zone, the second slurries spraying layer is established in second uptake zone, first slurries spraying layer, second slurries spraying layer is all connected with slurry pool by slurry circulating pump with circulating slurry sprinkling device, demister is established successively from bottom to top above second slurries spraying layer, deduster and exhanst gas outlet.
Further, be also provided with chilling spray protective device at smoke inlet place, chilling spray protective device is connected with by autocontrol valve water source; Between slurry circulating pump and circulating slurry sprinkling device, establish flow detector, flow detector is connected with autocontrol valve.
Further, agitating device and oxidation air distribution device is established in described slurry pool.
Further, described deduster is wet electrical dust precipitator.
Further, the position of described exhanst gas outlet is higher than the position of described smoke inlet.
Further, the inwall on described absorption tower establishes line with rubber or lining glass flake anticorrosive coat.
Flue gas enters from smoke inlet, first sprays slurries through circulating slurry sprinkling device (comprising spray piping, nozzle) and flue gas cool-down is cooled; When circulating slurry sprinkling device or connected slurry circulating pump break down, by chilling spray protective device spray water, flue gas cool-down is cooled, chilling spray protective device is connected with standing water source, and water supply line is equipped with autocontrol valve; Autocontrol valve and flow detector, flow detector can detecting that circulating slurry sprinkling device makes autocontrol valve open when not having slurries to flow, chilling spray protective device to the cooling of inlet flue gas spray water to protect absorption tower liner and slurries spraying layer; Flue gas from up to down flows after entering the first uptake zone, the sulfur dioxide in the first slurries spraying layer sprinkling slurries absorption flue gas and dust; Then enter the second uptake zone through flue gas reentrant pathway, bottom-up flowing, then spray slurries through the second slurries spraying layer and absorb sulfur dioxide in flue gas and dust further, then discharge through demister, deduster, exhanst gas outlet.
Wet electrical dust precipitator is directly installed on the first uptake zone and the second top, uptake zone, using the absorption tower of bottom as support, thus solve the existing vertical type wet electrical dust precipitator flue gas flow rate contradiction more inadequate than the slow and single absorption tower top of flue gas flow rate in absorption tower installation site, contrast is installed on wet electrical dust precipitator on horizontal flue, and this installs and makes that flue becomes very short, elbow is few, does not need to design support.
Be slurry pool in bottom, absorption tower, the first uptake zone and the second uptake zone be totally one slurry pool, in slurry pool as other desulfurizers design, has the structure such as slurry agitating device and oxidation air distribution device.
This device is used for removing of sulfur dioxide in flue gas, flue dust and other PM2.5, and smoke inlet place content of sulfur dioxide is at 7000mg/Nm
3, dust 50 mg/Nm
3time, the removal efficiency of sulfur dioxide can be made to reach more than 99.5% by the process of this device, outlet SO
2< 35mg/Nm
3, dust concentration < 5mg/Nm
3.The method adopts conventional lime stone-gypsum wet flue gas desulfurizing, adopt unlike, this device and method and comprise region, two absorption towers and be combined into an overall absorption tower, single stock tank, realize desulfuration efficiency more than 99.5%, and integrate wet electrical dust precipitator easily.This device improves the effect of flue gas desulfurization and dedusting, reduces the height on absorption tower, decreases the resistance of flow of flue gas, has saved construction investment and plant running cost.The ultra-clean draining technologies such as existing double tower double-cycle process or single tower double-cycle process are all better than in saving energy consumption, saving place, reduction investment cost.
Accompanying drawing explanation
Fig. 1 represents the structural principle schematic diagram of the flue gas processing device that the utility model provides;
In figure 1: smoke inlet; 2: circulating slurry sprinkling device; 3: the first slurries spraying layers; 4: flue gas reentrant pathway; 5: the second slurries spraying layers; 6: slurry circulating pump; 7: slurry pool; 8: demister; 9: deduster; 10: water source; 11: flow detector; 12: autocontrol valve; 13: chilling spray protective device; 14: dividing plate; 15: exhanst gas outlet.
Detailed description of the invention
Be described in detail to of the present utility model according to drawings and embodiments below.
The smoke eliminator that the present embodiment provides comprises absorption tower, the smoke absorption district establishing slurry pool 7 in absorption tower and be positioned at above slurry pool 7, at smoke inlet 1, place establishes circulating slurry sprinkling device 2, with dividing plate 14, smoke absorption is separated into the first uptake zone and the second uptake zone being positioned at the first side, uptake zone, the flue gas reentrant pathway 4 being flowed to the second uptake zone by the first uptake zone is established between dividing plate 14 and slurry pool 7, the first slurries spraying layer 3 is established in first uptake zone, the second slurries spraying layer 5 is established in second uptake zone, first slurries spraying layer 3, second slurries spraying layer 5 is all connected with slurry pool 7 by slurry circulating pump 6 with circulating slurry sprinkling device 2, demister 8 is established successively from bottom to up above second slurries spraying layer 5, deduster 9 and exhanst gas outlet 15.At smoke inlet 1, place is also provided with chilling spray protective device 13, and chilling spray protective device 13 is connected with water source 10 with by autocontrol valve 12; Between slurry circulating pump 6 and circulating slurry sprinkling device 2, establish flow detector 11, flow detector 11 is connected with autocontrol valve 12.
Flue gas to be clean enters the absorption tower of flue gas processing device from the smoke inlet 1 of device one side roof part; the alloy of the flue stickers lining wear resistant corrosion resistant of porch; be provided with circulating slurry sprinkling device 2 at flue entrance place, make flue gas cool-down carry out initial wash to flue gas with the impact failure protected absorption tower inside lining anti-corrosive material and inner part and be not subject to high temperature simultaneously.For reducing investment outlay, absorption tower inwall adopts line with rubber or lining glass flake to carry out anticorrosion, slurries spray piping adopts FRP material, line with rubber and its temperature that can bear of lining glass flake material are 90 DEG C, its flue-gas temperature that can bear of FRP pipeline is 80 DEG C, and flue-gas temperature is generally more than 100 DEG C, entrance establishes circulating sprayer 2 flue-gas temperature can be dropped to 70 DEG C and not make above-mentioned material be damaged ring.Spray is stopped in order to prevent flue entrance 1 Inner eycle slurries spray equipment 2 catastrophic failure; installing chilling spray protective device 13 after entrance circulating sprayer 2; chilling spray protective device 13 is connected with standing water source 10; inlet channel is installed autocontrol valve 12; when entrance circulating sprayer normally runs; autocontrol valve 12 cuts out; when circulating sprayer 2 is intake abnormal; when flow drops to below setting value; autocontrol valve 12 is opened, and chilling spray protective device 13 is sprayed water to flue gas mist cooling.The water inlet pipe of circulating sprayer is equipped with flow detector 11, flow detector 11 is connected with autocontrol valve 12, controls the opening and closing of autocontrol valve 12.Then flue gas enters smoke absorption district, smoke absorption district is divided into two absorption regions, left and right by dividing plate 14, be respectively the first uptake zone and the second uptake zone, dividing plate 14 is vertically arranged or basic vertical setting, and dividing plate lower end does not contact with the liquid level of slurry pool 7 and forms flue gas reentrant pathway; Flue gas is introduced into the first uptake zone after preliminary cooling, from up to down flows, the slurry liquid contacts sprayed with the first slurries spraying layer 3 arranged in the middle part of the first uptake zone, the pollutant SO in flue gas
2dust, HCl, HF etc. are by slurry wash, flue gas after washing continues descending, the second uptake zone is entered by flue gas reentrant pathway 4 to the liquid level of tower prime cement pond, flue gas is turned back to upper reaches, the slurries sprayed with the second slurries spraying layer 5 arranged in the middle part of the second uptake zone contact again, the pollutant SO in flue gas
2, dust, HCl, HF etc. are washed further by slurries and remove.Flue gas after washing continues to rise, the demister 8 arranged by top, removing droplet, then enters electric cleaner 9 by flue gas flow field adjustment section, in trapping flue gas with fine dust and SO
3discharge from exhanst gas outlet 15 Deng after pollutant.The slurries that first slurries spraying layer 3 and the second slurries spraying layer 5 spray are all from the public slurry pool 7 of tower bottom, slurry pool 7 is fallen into again washed the pollutant in flue gas with smoke contacts after, slurry pool is containing large quantities of lime stone and gypsum solution, slurry pool 7 is provided with agitating device, prevents lime stone and gypsum deposition; SO
2be dissolved in water after being absorbed by slurries and generate sulfurous acid, be filled with air make sulfurous acid be oxidized to sulfuric acid to slurry pool, the calcium carbonate reaction in itself and slurries generates gypsum.
This flue gas processing device floor space is little, and desulfurization and dedusting is effective, and flue gas circulating resistance is little, builds, operating cost is low.
Claims (6)
1. the flue gas device for deep cleaning for efficient desulfurizing and dust collecting, comprise absorption tower, establish slurry pool (7) in absorption tower and be positioned at the smoke absorption district above slurry pool (7), circulating slurry sprinkling device (2) is established at smoke inlet (1) place, it is characterized in that, with dividing plate (14), smoke absorption is separated into the first uptake zone and the second uptake zone being positioned at the first side, uptake zone, the flue gas reentrant pathway (4) being flowed to the second uptake zone by the first uptake zone is established between dividing plate (14) and slurry pool (7), the first slurries spraying layer (3) is established in first uptake zone, the second slurries spraying layer (5) is established in second uptake zone, first slurries spraying layer (3), second slurries spraying layer (5) is all connected with slurry pool (7) by slurry circulating pump (6) with circulating slurry sprinkling device (2), second slurries spraying layer (5) top establishes demister (8) from bottom to top successively, deduster (9) and exhanst gas outlet (15).
2. device as claimed in claim 1, it is characterized in that, also be provided with chilling spray protective device (13) at smoke inlet (1) place, chilling spray protective device (13) is connected with water source (10) by autocontrol valve (12); Between slurry circulating pump (6) and circulating slurry sprinkling device (2), establish flow detector (11), flow detector (11) is connected with autocontrol valve (12).
3. device as claimed in claim 1 or 2, is characterized in that, establish agitating device and oxidation air distribution device in described slurry pool (7).
4. device as claimed in claim 1 or 2, it is characterized in that, described deduster (9) is wet electrical dust precipitator.
5. device as claimed in claim 1 or 2, is characterized in that, the position of described exhanst gas outlet (15) is higher than the position of described smoke inlet (1).
6. device as claimed in claim 1 or 2, is characterized in that, the inwall on described absorption tower establishes line with rubber or lining glass flake anticorrosive coat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520156073.XU CN204502785U (en) | 2015-03-19 | 2015-03-19 | A kind of flue gas device for deep cleaning for efficient desulfurizing and dust collecting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520156073.XU CN204502785U (en) | 2015-03-19 | 2015-03-19 | A kind of flue gas device for deep cleaning for efficient desulfurizing and dust collecting |
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|---|---|
| CN204502785U true CN204502785U (en) | 2015-07-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722194A (en) * | 2015-03-19 | 2015-06-24 | 永清环保股份有限公司 | Deep flue gas purification device for efficient desulphurization and dust removal |
| CN105233604A (en) * | 2015-10-20 | 2016-01-13 | 西安墙体材料研究设计院 | Purification device for conducting flue gas desulfurization and dedusting on brick and tile kiln |
-
2015
- 2015-03-19 CN CN201520156073.XU patent/CN204502785U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722194A (en) * | 2015-03-19 | 2015-06-24 | 永清环保股份有限公司 | Deep flue gas purification device for efficient desulphurization and dust removal |
| CN105233604A (en) * | 2015-10-20 | 2016-01-13 | 西安墙体材料研究设计院 | Purification device for conducting flue gas desulfurization and dedusting on brick and tile kiln |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |