CN102908869A - Multi-layer type purifying absorption column for active coke smoke - Google Patents
Multi-layer type purifying absorption column for active coke smoke Download PDFInfo
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- CN102908869A CN102908869A CN2012104090879A CN201210409087A CN102908869A CN 102908869 A CN102908869 A CN 102908869A CN 2012104090879 A CN2012104090879 A CN 2012104090879A CN 201210409087 A CN201210409087 A CN 201210409087A CN 102908869 A CN102908869 A CN 102908869A
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Abstract
The invention provides a multi-layer type purifying absorption column for active coke smoke. The multi-layer type purifying absorption column for the active coke smoke comprises a material inlet bin, distribution bins, absorption chamber bodies and unloading bins, which are communicated from top to bottom; the material inlet bin is positioned at the top of the absorption column; the two groups of absorption chamber bodies are positioned on two sides of the middle part of the absorption column; two distribution bins are positioned between the material inlet bin and the corresponding absorption chamber body; and the unloading bins are positioned at the bottom of the absorption chamber bodies. With the adoption of the multi-layer type active coke smoke purifying absorption column, high removal efficiency of pollutant is achieved, the removal efficiency of SO2 is more than 96%, the removal efficiencies of SO3, HCl and HF are more than 98%, the removal efficiency of heavy metal Hg is more than 90%, and the dust removal efficiency is more than 80%.
Description
Technical field
The present invention relates to the flue gas pollutant purification apparatus, be specifically related to a kind of multiple field activated coke gas cleaning adsorption tower.
Background technology
In coal fired power plant flue gas desulfurization field, it is present that what adopt more than 90% all is lime stone-gypsum wet flue gas desulfurizing technique, although this technique technology maturation, be widely used, but its shortcoming also displays gradually in application process: 1) the water consumption is high: for the flue gas in power station boiler desulfurizer of not establishing flue gas heat-exchange unit GGH, amount to the water consumption of every gigawatt unit up to 220 ~ 250m
3/ h; 2) chimney anticorrosion and " gypsum rain " problem: the outlet flue gas of wet desulphurization device is saturated wet flue gas, must carry out chimney high-grade anticorrosionly, chimney " gypsum rain " problem also may occur, and surrounding enviroment are caused secondary pollution; 3) clean flue gas drop carries problem: the drop that carries in the clean flue gas is the gypsum slurries of 20% left and right sides concentration, wherein contains certain solid particle, enters and is dust pollution in the atmosphere; 4) a large amount of exploitations of lime stone and gypsum are piled up problem: owing to extensively adopt lime stone-gypsum wet flue gas desulfurizing technique, cause the large quantities of lime tor to be exploited, also cause the desulfurated plaster of some areas to pile up.
According to China coal electricity development plan, will focus the consruction on large moulded coal electricity base future, China rich coal area mainly is positioned at the north, also water-deficient area just.Activated coke dry method flue gas process for purifying water consumption is little, and than conventional wet desulfurization water saving more than 90%, and adsorbent activity Jiao produces by coal, and accessory substance is the utilization of concentrated sulfuric acid resourcebility, can not cause the exploitation of large quantities of lime stone and gypsum accumulation problem.In addition, in the environmental protection key area, environmental carrying capacity is little, and environmental protection standard is strict, and the activated coke flue gas purifying technique can be to SO
2, SO
3, NOx, HCl, HF, Hg, fine solid particle etc. carry out the while and efficiently remove, and do not have the problems such as " gypsum rain " of conventional wet desulfurization, clean flue gas drop carry, and can satisfy very strict environmental protection standard, are applicable to the gas cleaning of environmentally sensitive area.
In addition, for the purified treatment of steel sintering flue gas, flue gas of refuse burning, activated coke can be adsorbed wherein De bioxin pollutant simultaneously, and traditional wet desulfurizing process can't effectively remove by the Dui bioxin.Therefore, activated coke is applicable to the multi-pollutant removing in sinter fume and the flue gas of refuse burning and deep purifying.
The activated coke flue gas purifying technique is a kind of efficient, water saving, non-secondary pollution and the advanced technologies that removes simultaneously multiple pollutant, but this technique just has been in the starting stage in the application of China, in open source information, lack the further investigation to nucleus equipment and the key parameter of activated coke flue gas purifying technique.
Summary of the invention
The object of the present invention is to provide a kind of pollutant removing efficient high, SR is little, and unsaturated activated coke discharge rate is little, the activated coke internal circulating load is less, breakage rate is low, and the activated coke cloth is even, discharging is smooth and easy, installs stable multiple field activated coke gas cleaning adsorption tower.
For achieving the above object, the technical solution used in the present invention is: comprise the feeding warehouse, distribution bin, absorption cavity and the discharge bin that are connected from top to bottom, described feeding warehouse is positioned at the adsorption tower top, two groups of adsorbent chamber bodies are positioned at two side positions in the middle of the adsorption tower, two distribution bin are between corresponding feeding warehouse and absorption cavity, discharge bin is positioned at the bottom of absorption cavity, described every group of absorption cavity is comprised of some layers of adsorption layer, the bottom of each layer adsorption layer all is equipped with a frequency conversion type major axis discharger, and the length of this frequency conversion type major axis discharger runs through whole absorption cavity.
The thickness D of described every group of absorption cavity is 1.5 ~ 3.0m, and the height H of described absorption cavity is 16 ~ 30m.
Between described feeding warehouse and the distribution bin inlet valve is installed, the discharge bin outlet is equipped with discharge valve.
The inclination alpha of any point on the wall of described distribution bin and the feeding warehouse line of centres is greater than 40 °.
The angle of inclination beta of any point on the wall of described discharge bin and the discharge port line of centres is greater than 45 °.
Flue gas divides two strands vertically by two groups of absorption cavitys, and flue gas is 0.2 ~ 0.6m/s by the flow velocity that adsorbs the cavity void tower.
The void tower time of staying of described flue gas in the absorption cavity is 5 ~ 10s.
Adopt multiple field activated coke gas cleaning adsorption tower of the present invention, pollutant removing efficient is high, SO
2Removal efficiency is greater than 96%, SO
3, HCl, HF removal efficiency greater than 98%, the removal efficiency of heavy metal Hg is greater than 90%, efficiency of dust collection is greater than 80%.
Description of drawings
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is the side view of Fig. 1;
Fig. 3 is the schematic diagram at distribution bin 3 wall inclination angles;
Fig. 4 is the schematic diagram at discharge bin 6 wall inclination angles.
In the accompanying drawing, the parts of each label representative are as follows:
1 is feeding warehouse; 2 is inlet valve; 3 is distribution bin; 4 are the absorption cavity; 5 is the major axis discharger; 6 is discharge bin, and 7 is discharge valve.
The specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Referring to Fig. 1,2, the present invention includes the feeding warehouse 1 that is connected from top to bottom, distribution bin 3, absorption cavity 4 and discharge bin 6, described feeding warehouse 1 is positioned at the adsorption tower top, absorption cavity 4 is positioned at two side positions in the middle of the adsorption tower, two distribution bin 3 are between feeding warehouse 1 and corresponding absorption cavity 4, discharge bin 6 is positioned at the bottom of absorption cavity 4, between feeding warehouse 1 and distribution bin 3, inlet valve 2 is installed, discharge bin 6 outlets are equipped with discharge valve 7, every group of absorption cavity 4 is comprised of some layers of adsorption layer, the bottom of each layer adsorption layer all is equipped with a frequency conversion type major axis discharger 5, the length of this frequency conversion type major axis discharger 5 runs through whole absorption cavity 4, the thickness D of every group of absorption cavity 4 is 1.5 ~ 3.0m, and the height H of absorption cavity 4 is 16 ~ 30m, and flue gas of the present invention divides two strands vertically by two groups of absorption cavitys 4, and flue gas is 0.2 ~ 0.6m/s by the flow velocity of absorption cavity void tower, and the time of staying is 5 ~ 10s.
The present invention adopts the multi layer control time of staying of activated coke in adsorption tower, and in the present embodiment, the time of staying of ground floor activated coke in tower is 20 ~ 40h, and the second layer is 60 ~ 120h, and the 3rd layer is 140 ~ 280h.In every layer of activated coke, the activated coke uniform blanking.When the inlet flue gas pollutant levels change, can regulate discharge quantity by changing major axis discharger 5 rotating speeds.
The present invention is under the certain condition of every adsorption tower smoke treatment amount, flue gas passes through the flow velocity of absorption cavity 4 void towers by the windward side area definition, its area is the width W of absorption cavity 4 and the product of height H, in the present embodiment, the width W of absorption cavity 4 is 9m, height H is 18m, and flue gas is 0.284m/s by the void tower flue gas flow rate of absorption cavity 4.The void tower time of staying of flue gas in the absorption cavity determined that by thickness D and the void tower flue gas flow rate of absorption cavity 4 in the present embodiment, the thickness D of absorption cavity 4 is 2m, and the void tower time of staying of flue gas in absorption cavity 4 is 7.04s.Flue gas is closely related with thickness D and the void tower flue gas flow rate of absorption cavity 4 by the resistance of the activated coke layer in the activated coke absorption cavity 4, and in the present embodiment, flue gas is about 1900Pa by the resistance of the activated coke layer in the activated coke cavity 4.
Referring to Fig. 3, in the present embodiment, distribution bin 3 is cone structure, facies basialis pyramidis is the rectangle of 2m * 9m, the high 4.5m of cone, and the inclination alpha of the line at any point and charging aperture center is 44 ° ~ 77 ° on distribution bin 3 walls, activated coke can cover whole bottom surface in that distribution bin 3 is interior, fill whole distribution bin space, the chamber of not leaving a blank, activated coke is even at distribution bin 3 interior clothes.
Referring to Fig. 4, in the present embodiment, the cone structure of discharge bin 6 for standing upside down, facies basialis pyramidis is the rectangle of 5.5m * 9m, the high 5m of cone, the angle of inclination beta of the line at any point and discharge port center is between 46 ° ~ 63 ° on discharge bin 6 walls, and the activated coke discharging is smooth and easy.
The boiler exhaust gas of certain coal-burning power plant is after SCR denitration and electrostatic precipitation processing, and its Gas Parameters is as follows:
Exhaust gas volumn: 2760000Nm
3/ h(mark attitude, wet basis, actual O
2)
Flue-gas temperature: 140 ℃
Pollutant levels such as following table in the flue gas:
The corresponding configuration of 2 air-introduced machines 2 row activated coke adsorption towers of every boiler, every row are composed in parallel by 6 adsorption towers, and the exhaust gas volumn of every adsorption tower processing is 230000Nm
3About/h.
In the present embodiment, flue gas divides two bursts of three layers of activated coke of vertically passing in the absorption cavity 4 after entering adsorption tower, and in this process, the pollutant in the flue gas is by the activated coke adsorbing and removing.Fresh activated coke is stored in the feeding warehouse 1, control by inlet valve 2 enters into distribution bin 3, distribution bin 3 links to each other with absorption cavity 4, it is vertically mobile from top to bottom that activated coke in the absorption cavity 4 is divided into multilayer, and the time of staying of each layer activated coke in adsorption tower is by major axis discharger 5 controls of bottom.Adsorb saturated activated coke and enter into discharge bin 6, discharge by discharge valve 7 controls, then enter into desorption system and regenerate, the feeding warehouse 1 that the activated coke after the regeneration enters into again the adsorption tower top recycles.
In the present embodiment, the exit concentration of each pollutant and removal efficiency such as following table:
In the present embodiment, pollutant removing efficient is high, and SR is less, and discharge rate and the internal circulating load of activated coke are less, and the activated coke breakage rate is low, and the activated coke cloth is even, discharging is smooth and easy, and activated coke gas cleaning adsorption tower is efficient, stable, economical operation.
Adopt its beneficial effect of the present invention to be mainly reflected in following six aspects:
One adopts suitable flue gas flow rate, controls rational gas residence time, and pollutant removing efficient is high, SO
2Removal efficiency is greater than 96%, SO
3, HCl, HF removal efficiency greater than 98%, the removal efficiency of heavy metal Hg is greater than 90%, efficiency of dust collection is greater than 80%.
Its two, adopt suitable flue gas flow rate and adsorbent chamber body thickness, SR is little, the resistance of flue gas by the burnt layer of adsorbent chamber activity in vivo is less than 2500Pa.
Its three, adopt rational adsorbent chamber height, reduce adsorption tower and take up an area under the few condition of activated coke crushing breakage guaranteeing.
They are four years old, to adsorb cavity and be divided into multilayer, each layer bottom arranges a frequency conversion type major axis discharger, can control respectively the time of staying of each layer activated coke in tower according to kind and the concentration of institute's adsorption fouling thing, can also regulate according to the variation of pollutant levels the discharge quantity of major axis discharger, the discharge rate of accurate hierarchical control activated coke, the discharge rate of minimizing unsaturation activated coke reduces the breakage in the required energy consumption of desorption and regeneration and the cyclic process of minimizing activated coke; And the length of major axis discharger is through the whole width of absorption cavity, for slow, the mobile relatively poor activated coke of translational speed in the absorption cavity, can make its uniform blanking, make the saturated activated coke all can smooth and easy discharge, it be poor and gather and produce the danger that high temperature catches fire to prevent that adsorption efficiency from freely not appearring in local blanking.
Its five, the angle of repose that pile up greater than activated coke at the inclination angle of the line at any point on the distribution bin wall and charging aperture center guarantees that activated coke covers the whole end face of absorption cavity, has guaranteed that cloth is even in the distribution bin, each layer activated coke all can effectively be replenished; Also avoided activated coke to form cavity in distribution bin, flue gas is from the cavity escape and can not get purified treatment.
Its six, the inclination angle of any point and the line at discharge port center has guaranteed that greater than the slide angle of activated coke the discharging of activated coke is smooth and easy in the discharge bin, has avoided in the discharge bin of activated coke delay or has caused obstruction.
Adsorbent chamber body thickness of the present invention is the optimum value that considers pollutant removing efficient and flue gas resistance, adopts adsorbent chamber body thickness of the present invention, and pollutant removing efficient is high, and flue gas is moderate by the resistance of activated coke layer.If the adsorbent chamber body thickness is too small, the pollutant desulfuration efficiency can not satisfy environmental requirement; If the adsorbent chamber body thickness is excessive, then flue gas resistance is large, and system energy consumption is high.
Adsorbent chamber height of the present invention is the reasonable value that considers that activated coke anti-pressure ability and adsorption tower take up an area.If the activated coke housing depth is excessive, activated coke is crushed easily, has increased the loss of activated coke; If the activated coke housing depth is too small, under certain flue gas flow rate, the quantity that then needs to increase the width of absorption cavity or increase adsorption tower has increased the equipment occupation of land.
Flue gas is the optimal value that considers flue gas resistance, gas residence time and activated coke cavity size by the flow velocity of absorption cavity void tower among the present invention.If flue gas flow rate is too high, then flue gas is excessive by the resistance of activated coke layer, and flue gas is too short by the time of staying of activated coke layer, is unfavorable for adsorption reaction; If flue gas flow rate is excessively low, then the size of inevitable requirement activated coke cavity increases, and has increased equipment investment and adsorption tower and has taken up an area.
Claims (7)
1. multiple field activated coke gas cleaning adsorption tower, it is characterized in that: comprise the feeding warehouse (1) that is connected from top to bottom, distribution bin (3), absorption cavity (4) and discharge bin (6), described feeding warehouse (1) is positioned at the adsorption tower top, two groups of absorption cavitys (4) are positioned at two side positions in the middle of the adsorption tower, two distribution bin (3) are positioned between corresponding feeding warehouse (1) and the absorption cavity (4), discharge bin (6) is positioned at the bottom of absorption cavity (4), described every group of absorption cavity is comprised of some layers of adsorption layer, the bottom of each layer adsorption layer all is equipped with a frequency conversion type major axis discharger (5), and the length of this frequency conversion type major axis discharger (5) runs through whole absorption cavity (4).
2. multiple field activated coke gas cleaning adsorption tower according to claim 1 is characterized in that: the thickness D of described every group of absorption cavity (4) is 1.5 ~ 3.0m, and the height H of described absorption cavity (4) is 16 ~ 30m.
3. multiple field activated coke gas cleaning adsorption tower according to claim 1 is characterized in that: between described feeding warehouse (1) and the distribution bin (3) inlet valve (2) is installed, discharge bin (6) outlet is equipped with discharge valve (7).
4. multiple field activated coke gas cleaning adsorption tower according to claim 1, it is characterized in that: the inclination alpha of any point on the wall of described distribution bin (3) and feeding warehouse (1) line of centres is greater than 40 °.
5. multiple field activated coke gas cleaning adsorption tower according to claim 1, it is characterized in that: any point on the wall of described discharge bin (6) and the angle of inclination beta of the discharge port line of centres are greater than 45 °.
6. multiple field activated coke gas cleaning adsorption tower according to claim 1 is characterized in that: flue gas divide two strands vertical by two groups of absorption cavitys (4), and the flow velocity of flue gas by absorption cavity void tower is 0.2 ~ 0.6m/s.
7. multiple field activated coke gas cleaning adsorption tower according to claim 6 is characterized in that: the void tower time of staying of described flue gas in the absorption cavity is 5 ~ 10s.
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| CN103203182A (en) * | 2013-02-28 | 2013-07-17 | 煤炭科学研究总院 | Flue gas combined desulfurization denitration demercuration device and method |
| CN103230723A (en) * | 2013-04-22 | 2013-08-07 | 西安热工研究院有限公司 | Annular sectional cross-flow fume cleaning adsorption tower |
| CN103230724A (en) * | 2013-04-22 | 2013-08-07 | 西安热工研究院有限公司 | New cross-convective flue gas purification absorption tower |
| CN106669357A (en) * | 2017-03-03 | 2017-05-17 | 国电科学技术研究院 | Multipoint material distribution flow equalizing device |
| CN107433106A (en) * | 2017-08-29 | 2017-12-05 | 中国科学院过程工程研究所 | A kind of gas cleaning absorption tower and its processing method |
| CN109603520A (en) * | 2018-12-17 | 2019-04-12 | 中冶南方都市环保工程技术股份有限公司 | It is layered cross-flow active coke desulphurizing denitration dust collecting integral adsorbent equipment and application method |
| CN111470555A (en) * | 2020-04-23 | 2020-07-31 | 立达超微工业（苏州）有限公司 | Device for promoting removal of high-concentration phosphorus in wastewater by calcite |
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| CN111470555A (en) * | 2020-04-23 | 2020-07-31 | 立达超微工业（苏州）有限公司 | Device for promoting removal of high-concentration phosphorus in wastewater by calcite |
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