CN204337977U - A kind of mercury removal device of the shock tower based on marine alga Jiao - Google Patents
A kind of mercury removal device of the shock tower based on marine alga Jiao Download PDFInfo
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- CN204337977U CN204337977U CN201420689454.XU CN201420689454U CN204337977U CN 204337977 U CN204337977 U CN 204337977U CN 201420689454 U CN201420689454 U CN 201420689454U CN 204337977 U CN204337977 U CN 204337977U
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Abstract
The utility model relates to a kind of mercury removal device of the shock tower based on marine alga Jiao, adopts marine alga pyrolysis to produce biomass char as flue gas demercuration adsorbent, in shock tower reactor, adsorb demercuration; Reclaim mercury resource in the separator and reproducing adsorbent.The flue gas containing mercury from burner sprays into shock tower reactor by Laval nozzle after supercooling, the Laval nozzle that marine alga coke adsorbent is then arranged by coaxial subtend sprays into and clashes into tower reactor, and two strands of air-flows in shock tower reactor, subtend occur and clash into and the adsorbing and removing realizing mercury.When a shock tower reactor regeneration, automatic switchover is flowed into another and clashes into tower reactor by the flue gas from burner.Two mutual cross-references of shock tower reactor and regeneration.The method and device utilize marine alga pyrolysis to produce biomass char absorption demercuration, subtractive process non-secondary pollution, and adsorbent raw material are a kind of reserves renewable resources widely, have broad prospect of application.
Description
Technical field
The utility model relates to combustion product gases pollutant catabolic gene field, is specifically related to a kind of mercury removal device of the shock tower based on marine alga Jiao.
Background technology
Mercury is a kind of hypertoxicity and the traces of heavy metals element being easy to deposition in vivo, has great harm to health and ecological environment.United Nations Environment Programme points out in a survey report delivered, and coal-burning boiler is the maximum man-made pollution source of mercury emissions.China is the large consumption of coal state of the first in the world, and in energy resource structure, the ratio of coal is up to 75%, and this general layout does not still have large change within the quite a long time from now on.Along with the increasingly stringent of pollution that caused by coal burning thing air environmental protection standard, estimate in the near future, the appearance of coal-fired flue-gas mercury pollution control criterion will be inexorable trend.Therefore, researching and developing effective coal-fired flue-gas mercury pollution control method is one of vital task of facing of Environmental Protection in China scientific and technical personnel.
In recent years, Chinese scholars has done a large amount of fruitful work at research demercuration new theory and new technical field.At present, in numerous demercuration method, adsorbent and wet scrubbing are considered to the main flow demercuration technology that two of coal-fired flue gas mercury removal field have development potentiality most.
In wet scrubbing demercuration technology, most study is that the existing wet method fume desulfurizing system of application combines washing demercuration.This technology can realize higher Hg
2+(g) removal efficiency, but the Hg to indissoluble
0g () does not have obvious removal effect, partial oxidation state mercury also may be reduced to Elemental Mercury.Many scholars attempt with some oxidation technologies before desulfurizing tower by the Hg in flue gas
0g () initial oxidation is Hg
2+(g), and then remove Hg with wet method fume desulfurizing system washing
2+(g).More SCR (SCR) the catalytic oxidation demercuration of current research can realize part Hg
0g () is converted into Hg
2+(g), but demercuration effect is subject to the obvious impact of coal-fired component, catalyst type, combustion system and burner structure, and associated catalytic oxidation mechanism is still not fully aware of.Other oxidation technology, such as plasma oxidation, photochemical catalytic oxidation and ozone oxidation etc. are still in the laboratory exploratory stage.Utilize conventional oxidation agent oxidative absorption Hg in absorption tower such as potassium permanganate, potassium peroxydisulfate and sodium chlorite
0g () also achieves good result, but also there is the deficiencies such as absorbent costliness or the process of product component complicated difficult, and correlation technique needs perfect further.
Absorption method is mainly by the Hg in active carbon or other adsorbent flue gas
2+(g) and Hg
0g (), is first translated into particulate Hg, then utilize existing cleaner caught and reach demercuration object.Current research is more and technology is the most ripe active carbon adsorption has higher demercuration efficiency, but application cost is high, and enterprise is difficult to bear.Other adsorbent, although such as noble metal, metal oxide, flying dust, activated coke, calcium-based materials, molecular sieve and natural minerals etc. have potential development prospect, but due in application cost, demercuration efficiency, the shortcoming of the aspects such as adsorbent stability and adsorption mechanism research, with not enough, also cannot obtain large-scale industrial application at present.In sum, a kind of coal-fired flue gas mercury removal technology being suitable for large-scale commercial is not also had at present.
Utility model content
In order to solve problems of the prior art, the utility model provides a kind of shock tower mercury removal device based on marine alga Jiao.
This device adopts marine alga pyrolysis to produce biomass char as flue gas demercuration adsorbent, in shock tower reactor, adsorb demercuration; Reclaim mercury resource in the separator and reproducing adsorbent.Closing from burner has the flue gas of mercury to spray into shock tower reactor by Laval nozzle after supercooling, the Laval nozzle that marine alga coke adsorbent is then arranged by coaxial subtend sprays into and clashes into tower reactor, and two strands of air-flows in shock tower reactor, subtend occur and clash into and the adsorbing and removing realizing mercury.When a shock tower reactor regeneration, automatic switchover is flowed into another and clashes into tower reactor by the flue gas from burner; Two mutual cross-references of shock tower reactor and regeneration.
The principle of subtractive process of the present utility model:
By ESEM (SEM) figure of the marine alga of Fig. 1 shown in Fig. 1 and table 1 coke adsorbent; Table 1 is specific area and the aperture result of the nitrogen adsorption method test that marine alga coke adsorbent adopts, the marine alga coke adsorbent produced with sea-tangle is representative, adopt ESEM (SEM), surface appearance feature that X-ray fluorescence spectra (XRF) and nitrogen adsorption method determine adsorbent respectively, main component and and the crucial materialization mathematic(al) parameter such as the specific area of content and adsorbent and pore-size distribution, and the preliminary examinations absorption property of adsorbent.Result shows, the marine alga coke adsorbent main component produced with sea-tangle is the alkali metal salts such as K, Ca and SiO
2, Al
2o
3deng metal oxide, adsorbent has larger specific area and flourishing gap structure.These compositions are all the adsorbing and removing materials of good mercury.Therefore, marine alga Jiao absorption demercuration is adopted to have feasibility at technical method.
Table 1
According to above-mentioned principle, the technical solution adopted in the utility model is as follows:
Shock tower mercury removal device based on marine alga Jiao is provided with flue, gas cooler, shock tower reactor, separator, blower fan and valve; Described shock tower reactor head is provided with valve, and valve bottom is provided with core separating plate successively, rotates ash-scraper and Laval nozzle; Laval nozzle is located at respectively and is clashed in tower reactor and coaxial subtend layout; Burner is connected with the entrance of gas cooler by flue, and the outlet of gas cooler is communicated with shock tower reactor, and described conveying marine alga coke adsorbent enters the pipeline clashing into tower and is provided with blower fan, and pipeline is communicated with the Laval nozzle clashing into tower reactor.Pass into marine alga coke adsorbent Laval nozzle to arrange with the coaxial subtend of the Laval nozzle passing into flue gas.
Described burner is provided with two exhanst gas outlets, two exhanst gas outlets is respectively equipped with valve V3 and valve V8, and for switching the flow direction of flue gas, flue collector is provided with blower fan one for flow of flue gas provides power.
Flue gas passes into Laval nozzle by shock tower reactor inlet c and sprays into shock tower reactor after gas cooler temperature adjustment, marine alga coke adsorbent sprays into shock tower reactor by blower fan two by the Laval nozzle that coaxial subtend is arranged through clashing into tower reactor inlet d, and two strands of air-flows in shock tower reactor, subtend occur and clash into and the adsorbing and removing realizing mercury.
Described exhanst gas outlet connects two the shock tower reactors be symmetrical set respectively, and two shock tower reactors are identical, when wherein one as absorption tower adsorbs demercuration time, other one is then mainly used in reproducing adsorbent and reclaims mercury resource.Two mutual cross-references of shock tower reactor and regeneration, thus whole adsorption process can be realized carry out continuously.
Described shock tower reactor is provided with outlet f, adsorb saturated after marine alga coke adsorbent by after being sucked separator by blower fan three and regenerating, then passed into by shock tower reactor inlet g and clash into tower reactor cycles and use; Described separator inlet u is for passing into nitrogen wash and SO2, NOx of carrying on marine alga coke adsorbent and mercury.
Described shock tower reactor head is provided with core separating plate, and the average pore size of core separating plate is less than 50 microns, escapes with flue gas to prevent adsorbent.Core separating plate bottom is provided with rotation ash-scraper, is made up of a word hairbrush and driving shaft, is driven to rotate and moves, be mainly used in the adsorbent striking off the accumulation of core separating plate bottom, prevent blocking by motor.
The Laval nozzle clashed in tower reactor adopts multi-stage cross to arrange; According to the difference of height for reactor and jet pipe model, the vertical interval H between Laval nozzle adjacent two layers is between 30cm-150cm, and adjacent two-stage adopts 90 degree of arranged crosswise staggered, to ensure the shock uniformity in reactor.Laval nozzle loads the length of clashing into tower reactor (wall) and is less than 25cm, to reduce the issuable dead angle area of Laval nozzle root.The quantity of jet pipe model and layout, by clashing into tower reactor diameter and highly determining, determines that principle ensures to clash in tower reactor to have good gas-solid mixing and uniformity.
The marine alga coke adsorbent adopted is that the marine alga that extensively distributed by China's Coastal Areas is by furnace high-temperature cracking.Described marine alga refers to a kind of or two or more mixture in sea-tangle, laver, undaria pinnitafida, fragrant plant mentioned in ancient texts, sargassum, Enteromorpha and asparagus.
Advantage of the present utility model and remarkable result:
Due to current biomass resource exploitation mainly with crops or the ground such as stalk, timber living beings for raw material, consequently result in the situation with the resource contention such as grain, arable land, water on the one hand; On the other hand, the development space of above-mentioned raw materials is limited, and especially China's terrestrial life matter resource is very disperseed, and extensive focus utilization will cause manpower and cost of transportation sharply to increase, and is difficult to the large-scale application demand meeting future market in the long run.Being developed as of marine biomass resource solves the problem and provides a possible effective way.Be that the marine biomass of representative has following plurality of advantages with marine alga: (1) output is high, and beachhead or salt-soda soil can be utilized to cultivate on a large scale, be convenient to on-the-spotly concentrate scale processing and transport; (2) not land occupation and freshwater resources; (3) be conducive to protecting the marine environment, prevention Oceanic disasters (cultivation of marine alga can effectively absorb eutrophication element, suppresses red tide to occur); (4) CO is absorbed by photosynthesis
2, produce significant reduction of greenhouse gas discharge benefit.Therefore, active development and utilize marine biomass resource to have important theory significance and actual industrial to be worth.
The utility model utilizes marine alga to prepare the burnt flue gas demercuration adsorbent of marine alga, the method cheaper starting materials is easy to get, wide material sources, technique simple, non-secondary pollution, and especially raw material is renewable resource, inexhaustible, nexhaustible, there is good exploitation and industrial value.The utility model has good flue gas demercuration performance by adsorbent prepared by certain technique and parameter.In conjunction with the shock tower reactor conbined usage with high mass-transfer efficiency, demercuration efficiency reaches as high as 100%, be a kind of have have development and application be worth Novel flue gas demercuration method and device.
Accompanying drawing explanation
ESEM (SEM) figure of Fig. 1 marine alga coke adsorbent.
Fig. 2 is the process chart (only a unification shock tower reactor) of the utility model system and device.
Fig. 3 a, Fig. 3 b are the general arrangements (closing two shock tower reactors) of the two shock tower reactor of the utility model.
Fig. 4 is that the utility model rotates amplification and the structure chart of scraping hawk.
Fig. 5 is schematic diagram and the size marking that the utility model clashes into tower reactor jet pipe layout.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described further.
Based on a device for the shock tower demercuration of marine alga Jiao, marine alga pyrolysis is adopted to produce biomass char as flue gas demercuration adsorbent, Adsorption of Mercury in shock tower reactor 3; Mercury resource is reclaimed and reproducing adsorbent in separator 4.
As shown in Figure 2, the shock tower mercury removal device based on marine alga Jiao is provided with flue, gas cooler 2, clashes into tower reactor 3, separator 4, blower fan 1-1,1-2,1-3 and valve V1-8; Described shock tower reactor 3 top is provided with valve V5, and valve V5 bottom is provided with core separating plate 6 successively, rotates ash-scraper 5 and Laval nozzle 10; Laval nozzle 10 is located at respectively and is clashed in tower reactor 3 and coaxial subtend layout; Burner is connected by the entrance of flue with gas cooler 2, the outlet of gas cooler 2 is communicated with shock tower reactor 3, described conveying marine alga coke adsorbent enters the pipeline clashing into tower and is provided with blower fan two 1-2, and pipeline is communicated with the Laval nozzle 10 clashing into tower reactor 3.Pass into marine alga coke adsorbent Laval nozzle 10 to arrange with the coaxial subtend of Laval nozzle 10 passing into flue gas.
Described burner is provided with two exhanst gas outlets, two exhanst gas outlets is respectively equipped with valve V3 and valve V8, and for switching the flow direction of flue gas, flue collector is provided with blower fan one 1-1 for flow of flue gas provides power.
Flue gas passes into Laval nozzle 10 by shock tower reactor inlet c and sprays into shock tower reactor 3 after gas cooler 2 temperature adjustment, marine alga coke adsorbent sprays into shock tower reactor 3, two strands of air-flows generation subtend in shock tower reactor 3 through the Laval nozzle 10 that shock tower reactor inlet d is arranged by coaxial subtend by blower fan two 1-2 and clashes into and realize the adsorbing and removing of mercury.
As shown in Figure 4, described exhanst gas outlet connects two the shock tower reactors 3 be symmetrical set respectively, two shock tower reactors 3 are identical, when wherein one as absorption tower adsorbs demercuration time, other one is then mainly used in reproducing adsorbent and reclaims mercury resource.Two mutual cross-references of shock tower reactor 3 and regeneration, thus whole adsorption process can be realized carry out continuously.
Described shock tower reactor is provided with outlet f, adsorb saturated after marine alga coke adsorbent by being sucked after separator 4 regenerates by blower fan three 1-3, then passed into by shock tower reactor inlet g and clash into tower reactor 3 and recycle; Described separator inlet h is for passing into nitrogen wash and SO2, NOx of carrying on marine alga coke adsorbent and mercury.
As best shown in figures 3 a and 3b, described shock tower reactor 3 top is provided with core separating plate 6, and the average pore size of core separating plate 6 is less than 50 microns, escapes with flue gas to prevent adsorbent.Core separating plate 6 bottom is provided with and rotates ash-scraper 5, is made up of a word hairbrush 5-1 and driving shaft 5-2, is driven to rotate and moves, be mainly used in the adsorbent striking off the accumulation of core separating plate 6 bottom, prevent blocking by motor.
As shown in Figure 5, the Laval nozzle 10 clashed in tower reactor 3 adopts multi-stage cross to arrange; According to the difference of height for reactor and jet pipe model, the vertical interval H between Laval nozzle adjacent two layers is between 30cm-150cm, and adjacent two-stage adopts 90 degree of arranged crosswise staggered, to ensure the shock uniformity in reactor.Laval nozzle loads the length of clashing into tower reactor (wall) and is less than 25cm, to reduce the issuable dead angle area of Laval nozzle root.The quantity of jet pipe model and layout, by clashing into tower reactor diameter and highly determining, determines that principle ensures to clash in tower reactor to have good gas-solid mixing and uniformity.
Claims (5)
1. based on a mercury removal device for the shock tower of marine alga Jiao, it is characterized in that: described device is provided with flue, gas cooler, shock tower reactor, separator, blower fan and valve; Described shock tower reactor head is provided with valve, and valve bottom is provided with core separating plate successively, rotates ash-scraper and Laval nozzle; Laval nozzle is located at respectively and is clashed in tower reactor and coaxial subtend layout; Burner is connected with the entrance of gas cooler by flue, the outlet of gas cooler is communicated with shock tower reactor, described conveying marine alga coke adsorbent enters the pipeline clashing into tower and is provided with blower fan, and conveying marine alga coke adsorbent enters the pipeline clashing into tower and is communicated with the Laval nozzle clashing into tower reactor; The outlet f of described shock tower reactor is connected with the entrance of separator, and the outlet of separator connects clashes into tower reactor inlet g.
2. the mercury removal device of a kind of shock tower based on marine alga Jiao according to claim 1, it is characterized in that: described burner is provided with two exhanst gas outlets, two exhanst gas outlets are provided with valve V3 and V8, described exhanst gas outlet connects two the shock tower reactors be symmetrical set respectively, two described mutual cross-references of reactor and regeneration.
3. the mercury removal device of a kind of shock tower based on marine alga Jiao according to claim 1 and 2, it is characterized in that: described shock tower reactor is provided with outlet f, adsorb saturated after marine alga coke adsorbent by after being sucked separator by blower fan three and regenerating, then passed into by shock tower reactor inlet g and clash into tower reactor cycles and use; Described separator inlet h is for passing into nitrogen wash and SO2, NOx of carrying on marine alga coke adsorbent and mercury.
4. the mercury removal device of a kind of shock tower based on marine alga Jiao according to claim 3, it is characterized in that: described shock tower reactor head is provided with core separating plate, the average pore size of core separating plate is less than 50 microns, core separating plate bottom is provided with rotation ash-scraper, be made up of a word hairbrush and driving shaft, driven to rotate by motor and move.
5. the mercury removal device of a kind of shock tower based on marine alga Jiao according to claim 4, it is characterized in that: the Laval nozzle clashed in tower reactor adopts multi-stage cross to arrange, vertical interval H between Laval nozzle adjacent two layers is between 30cm-150cm, and adjacent two-stage adopts 90 degree of arranged crosswise staggered, Laval nozzle loads the length of clashing into tower reactor and is less than 25cm.
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| CN201420689454.XU CN204337977U (en) | 2014-11-17 | 2014-11-17 | A kind of mercury removal device of the shock tower based on marine alga Jiao |
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| CN201420689454.XU CN204337977U (en) | 2014-11-17 | 2014-11-17 | A kind of mercury removal device of the shock tower based on marine alga Jiao |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107789945A (en) * | 2017-11-21 | 2018-03-13 | 太原理工大学 | Oxygen deprivation produces biological Jiao and is used for the continuous demercuration method of boiler of power plant |
| CN115337893A (en) * | 2022-08-17 | 2022-11-15 | 沈阳工业大学 | Device and method for preparing ethylene carbonate by high-speed jet flow impact tubular reactor |
-
2014
- 2014-11-17 CN CN201420689454.XU patent/CN204337977U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107789945A (en) * | 2017-11-21 | 2018-03-13 | 太原理工大学 | Oxygen deprivation produces biological Jiao and is used for the continuous demercuration method of boiler of power plant |
| CN115337893A (en) * | 2022-08-17 | 2022-11-15 | 沈阳工业大学 | Device and method for preparing ethylene carbonate by high-speed jet flow impact tubular reactor |
| CN115337893B (en) * | 2022-08-17 | 2024-06-04 | 沈阳工业大学 | Device and method for preparing ethylene carbonate by high-speed jet impact on tubular reactor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150520 Termination date: 20151117 |
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| EXPY | Termination of patent right or utility model |