CN103230724A - New cross-convective flue gas purification absorption tower - Google Patents
New cross-convective flue gas purification absorption tower Download PDFInfo
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- CN103230724A CN103230724A CN2013101417173A CN201310141717A CN103230724A CN 103230724 A CN103230724 A CN 103230724A CN 2013101417173 A CN2013101417173 A CN 2013101417173A CN 201310141717 A CN201310141717 A CN 201310141717A CN 103230724 A CN103230724 A CN 103230724A
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Abstract
The invention discloses a new cross-convective flue gas purification absorption tower. The new fault-convective flue gas purification absorption tower from top to bottom comprises a feeding hopper, a distributing device, an active coke bed layer and a discharging hopper communicated in sequence, wherein a middle flue gas collecting chamber is arranged in the active coke bed layer; the two-layer discharging hopper is arranged at the lower part of the active coke bed layer; the external part of the active coke bed layer is divided into an upper pure flue gas collecting chamber and a lower raw flue gas distributing chamber by a two-layer annular separating plate; an outlet flue is formed in the upper part of the pure flue gas collecting chamber; a raw flue gas inlet flue communicated with the raw flue gas distributing chamber is arranged at the lower part of the raw flue gas distributing chamber; and the active coke bed layer, the middle flue gas collecting chamber, the raw flue gas distributing chamber and the pure flue gas collecting chamber and the cross section of the overall tower body are circular. By adopting the absorption tower disclosed by the invention, the removal efficiency of the pollutant in the flue gas is high; the removal efficiency of SO2 is greater than 96%; the removal efficiencies of SO3, HCl and HF are greater than 98%; the removal efficiency of heavy metal Hg is greater than 90%; and the dust collection efficiency is greater than 80%; and meanwhile, the absorption tower disclosed by the invention also has the advantages of being convenient and uniform in feeding, smooth in blanking, high in utilization rate of the active coke and easy to enlarge.
Description
Technical field
The present invention relates to a kind of is the activated coke dry method adsorption tower that boiler of power plant, metallurgy, waste incineration and chemical industry waste gas carry out desulfurization, is specifically related to a kind of novel mistake-convection current gas cleaning adsorption tower.
Technical background
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 technology, though this technology 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 device GGH, amount to the water consumption of every gigawatt unit up to 150～200m
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 high-grade anticorrosionly to chimney, 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 technology, 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 big 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 purifying technique water consumption is little, and than conventional wet desulfurization water saving more than 90%, and adsorbent activity Jiao produces by coal, but accessory substance is concentrated sulfuric acid recycling, 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, the environmental protection standard strictness, 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 problems such as " the 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.
Adsorption tower is the nucleus equipment of activated coke desulfurization technology, but this technology just has been in the starting stage in the application of China, and especially the China that is applied in of power plant's scale does not still have achievement, so China needs the novel adsorption tower structure that exploitation has independent intellectual property right badly.
Summary of the invention
In order to solve the problem that above-mentioned prior art exists, the object of the present invention is to provide a kind of novel mistake-convection current gas cleaning adsorption tower, has pollutant removing efficient height, SR is little, activated coke utilization rate height, internal circulating load is little, breakage rate is low, cloth is even, the characteristics that the smooth and easy device of discharging is stable.
For reaching above purpose, the present invention adopts following technical scheme:
A kind of novel mistake-convection current gas cleaning adsorption tower, comprise feed hopper 1, feed hopper 1 bottom arranges distributing device 2, distributing device 2 bottoms are provided with cross section and are the activated coke bed 9 of annular, activated coke bed 9 inside are middle flue gas collection chamber 6, the outside is divided into the clean flue gas collection chamber 4 on top and the former flue gas cloth air chamber 10 of bottom by double-deck toroidal membrane 8,6 of described activated coke bed 9 and middle flue gas collection chambers are communicated with by middle flue gas collection chamber grid 7,4 of activated coke bed 9 and clean flue gas collection chambers are communicated with by clean flue gas gas collection grid 5,10 of activated coke bed 9 and former flue gas cloth air chambers are communicated with by former flue gas air inlet grid 11, described clean flue gas collection chamber 4 tops are provided with the exhaust pass 3 with its connection, described former flue gas cloth air chamber 10 bottoms are provided with the former smoke inlet flue 12 with its connection, described activated coke bed 9 bottoms are provided with double-deck dump skip, described double-deck dump skip comprises upper strata dump skip 13 and lower floor's dump skip 14, and the line in the line in described upper strata dump skip 13 sidelines, outer panel bottom surface and lower floor's dump skip 14 outer panel end face sidelines and upper strata dump skip 13 sidelines, interior plate bottom surface and lower floor's dump skip 14 interior plate end face sidelines and the angle of horizontal plane are less than the angle of repose of activated coke; Lower floor's dump skip 14 bottoms are provided with discharge valve 15, and described middle flue gas collection chamber 6 bottoms are provided with ash bucket 16, and ash bucket 16 bottoms are provided with unloading valve 17; The cross section of described activated coke bed 9, former flue gas cloth air chamber 10, clean flue gas collection chamber 4 and whole tower body is annular.
The bus of flue gas collection chamber grid 7 and the angle α of vertical direction are 0.5～5 ° in the middle of described.
The angle of described upper strata dump skip 13 outer panels and horizontal plane is greater than the angle of interior plate and horizontal plane.
Described distributing device 2 be shaped as cone.
Distance between described double-deck toroidal membrane 8 is two-layer is greater than 2 times of activated coke bed 9 average thickness.
The average thickness D of described activated coke bed 9 is 0.8～2.5m.
Described double-deck dump skip adopts subregion to arrange that number of partitions is 1,2,3,4,6,9,12.
The present invention compares with prior art, has following advantage:
1, adsorption tower integral body of the present invention is annular, compares with square tower, has simple in structurely, saves material, is easy to maximize, and the discharging smoothness is not prone to the dead point, and can avoid stress to concentrate; Dump skip adopts double-deck dump skip, and boiler smoke is divided into two-way according to the resistance size after entering former flue gas cloth air chamber, forms cross-flow with adsorption tower on the road direction, and another part enters and activated coke bed formation convection current in the middle of double-deck dump skip.So just under the situation that does not increase SR, form mistake-convection current combination, thereby guarantee that the outlet activated coke has higher saturation degree; The line in the line in sideline, dump skip outer panel bottom surface, upper strata and lower floor dump skip outer panel end face sideline and sideline, dump skip interior plate bottom surface, upper strata and lower floor dump skip interior plate end face sideline and the angle of horizontal plane can not flow out activated coke less than the angle of repose of activated coke between upper strata dump skip and lower floor's dump skip.
2, adsorption tower of the present invention is divided into two sections by double-deck hoop dividing plate, activated coke relies on gravity to flow from top to bottom, saturation degree higher activated coke in bottom at first contacts with former flue gas, the activated coke saturation degree is further increased, the flue gas of partial desulfurization contacts with the fresh activated coke in top through middle flue gas collection chamber again, thereby guarantees higher desulfuration efficiency.Compare existing single hop cross-flow technology, the present invention exports activated coke saturation degree height, and whole absorption Sulfur capacity is big, the desulfuration efficiency height, thus activated coke loadings and internal circulating load reduce, and the adsorption tower volume reduces, and breakage rate reduces, and construction and operating cost reduce; And the high SO of upper semisection
2The concentration flue gas at first contacts with the inboard activated coke of bed, makes inboard activated coke saturation degree be higher than outside activated coke, after activated coke enters lower semisection, and high concentration SO
2Flue gas at first contacts with bed outside activated coke, makes outlet activated coke saturation degree be tending towards even.
3, the bus of flue gas collection chamber grid 7 and the angle α of vertical direction are 0.5～5 ° in the middle of the present invention, therefore, make activated coke bed cross section at right angles trapezoidal, thickness of bed layer reduces along with highly increasing gradually, thereby makes bed height more high, and flue gas flow is more big, top activated coke freshness is higher simultaneously, thereby make whole adsorption tower desulfuration efficiency higher, the time of staying of activated coke in tower increases, and internal circulating load reduces.
4, the angle of upper strata dump skip outer panel of the present invention and horizontal plane guarantees that by adjusting angle saturation degree bigger activated coke flowing velocity in the activated coke bed outside is greater than the lower activated coke of inboard saturation degree greater than the angle of interior plate and horizontal plane.Under the situation that does not increase deflector, just can realize the activated coke laminar flow like this.
5, distributing device of the present invention be shaped as cone, top single-point feed just can be realized the even feeding of whole system, has reduced the requirement to induction system.
Description of drawings
Fig. 1 is adsorption tower front view of the present invention.
Fig. 2 is adsorption tower vertical view of the present invention.
Fig. 3 launches profile for the activated coke bed.
Fig. 4 is the double-layer hopper stereogram.
The specific embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
As depicted in figs. 1 and 2, a kind of novel mistake of the present invention-convection current gas cleaning adsorption tower, comprise feed hopper 1, feed hopper 1 bottom arranges distributing device 2, distributing device 2 bottoms are provided with cross section and are the activated coke bed 9 of annular, activated coke bed 9 inside are middle flue gas collection chamber 6, the outside is divided into the clean flue gas collection chamber 4 on top and the former flue gas cloth air chamber 10 of bottom by double-deck toroidal membrane 8,6 of described activated coke bed 9 and middle flue gas collection chambers are communicated with by middle flue gas collection chamber grid 7,4 of activated coke bed 9 and clean flue gas collection chambers are communicated with by clean flue gas gas collection grid 5,10 of activated coke bed 9 and former flue gas cloth air chambers are communicated with by former flue gas air inlet grid 11, described clean flue gas collection chamber 4 tops are provided with the exhaust pass 3 with its connection, described former flue gas cloth air chamber 10 bottoms are provided with the former smoke inlet flue 12 with its connection, described activated coke bed 9 bottoms are provided with double-deck dump skip, described double-deck dump skip comprises upper strata dump skip 13 and lower floor's dump skip 14, and the line in the line in described upper strata dump skip 13 sidelines, outer panel bottom surface and lower floor's dump skip 14 outer panel end face sidelines and upper strata dump skip 13 sidelines, interior plate bottom surface and lower floor's dump skip 14 interior plate end face sidelines and the angle of horizontal plane are less than the angle of repose of activated coke; Lower floor's dump skip 14 bottoms are provided with discharge valve 15, and described middle flue gas collection chamber 6 bottoms are provided with ash bucket 16, and ash bucket 16 bottoms are provided with unloading valve 17; The cross section of described activated coke bed 9, former flue gas cloth air chamber 10, clean flue gas collection chamber 4 and whole tower body is annular.
As preferred embodiment of the present invention, the bus of described middle flue gas collection chamber grid 7 and the angle α of vertical direction are 0.5～5 °, make activated coke bed cross section be up-narrow and down-wide right-angled trapezium.
As preferred embodiment of the present invention, the angle of described upper strata dump skip 13 outer panels and horizontal plane is greater than the angle of interior plate and horizontal plane.
As preferred embodiment of the present invention, described distributing device 2 be shaped as cone.
As preferred embodiment of the present invention, the distance between described double-deck toroidal membrane 8 is two-layer is greater than 2 times of activated coke bed 9 average thickness.
As preferred embodiment of the present invention, the average thickness D of described activated coke bed 9 is 0.8～2.5m.
Operation principle of the present invention is: activated coke is fed by feed hopper 1, by cone-shaped cloth device 2 activated coke is evenly distributed in bed, boiler smoke enters adsorption tower from former smoke inlet flue 12, air velocity descends, difference according to adsorption tower bottom bed layer resistance, part of smoke enters from the centre of upper strata dump skip 13 and lower floor's dump skip 14, form convection current with activated coke vertically downward, another part flue gas vertically passes the activated coke bed through former flue gas air inlet grid 11, form cross-flow, make adsorption tower outlet activated coke reach highly saturated.Two parts flue gas mixes in middle flue gas collection chamber 6, continues uply, vertically passes upper semisection activated coke bed 9 and contacts with the fresh activated coke of upper semisection, collects through clean flue gas collection chamber 4, flows out adsorption towers from exhaust pass 3.Activated coke relies on gravity to descend, and a plurality of discharge valves of along the circumferential direction arranging by the bottom flow out adsorption tower.
As shown in Figure 1, flue gas gas collection grid bus and vertical direction α in a certain angle in the middle of the present invention, activated coke bed cross section is trapezoidal, thickness of bed layer reduces along with highly increasing gradually, thereby makes bed height more high, and flue gas flow is more big, top activated coke freshness is higher simultaneously, thereby make whole adsorption tower desulfuration efficiency higher, the time of staying of activated coke in tower increases, and internal circulating load reduces.
As shown in Figure 3, described double-deck dump skip adopts subregion to arrange that the present embodiment number of partitions is 6.
As shown in Figure 4, dump skip of the present invention adopts double-layer hopper, and boiler smoke is divided into two-way according to the resistance size after entering former flue gas cloth air chamber, forms cross-flow with adsorption tower on the road direction, and another part enters and activated coke bed formation convection current in the middle of double-layer hopper.So just under the situation that does not increase SR, form mistake-convection current combination, thereby guarantee that the outlet activated coke has higher saturation degree.
As shown in Figure 4, the angle of the line in the line in dump skip 13 sidelines, outer panel bottom surface, upper strata of the present invention and lower floor's dump skip 14 outer panel end face sidelines and upper strata dump skip 13 sidelines, interior plate bottom surface and lower floor's dump skip 14 interior plate end face sidelines and horizontal plane is less than the angle of repose of activated coke; The assurance activated coke is seen smooth and easy flowing at double-layer hopper, avoids activated coke to enter former flue gas cloth air chamber or middle flue gas collection chamber.
As shown in Figure 4, the angle of upper strata dump skip outer panel of the present invention and horizontal plane is greater than the angle of interior plate and horizontal plane.Guarantee that by adjusting angle saturation degree bigger activated coke flowing velocity in the activated coke bed outside is greater than the lower activated coke of inboard saturation degree.Under the situation that does not increase deflector, just can realize the activated coke laminar flow like this.
The whole housing structure of the present invention adopts cylindric, inside arranges the cone-shaped cloth device, the bottom arranges a plurality of dump skips along the circumferential direction is set, guaranteed that so not only discharging is smooth and easy, the stagnant area does not appear, and just can realize even feeding by single-point, and need not arrange major axis roller-type discharging device, reduced the requirement to induction system.Adopt adsorption tower of the present invention, pollutant removing efficient height in the flue gas, SO
2Removal efficiency is greater than 96%, SO
3, the removal efficiency of HCl, HF is greater than 98%, and the removal efficiency of heavy metal Hg is greater than 90%, and efficiency of dust collection is greater than 80%; Simultaneously, the present invention also has that feed is convenient evenly, blanking is smooth, activated coke utilization rate height, is easy to advantage such as maximization.
Claims (7)
1. novel mistake-convection current gas cleaning adsorption tower, comprise feed hopper (1), it is characterized in that: feed hopper (1) bottom arranges distributing device (2), distributing device (2) bottom is provided with cross section and is the activated coke bed (9) of annular, activated coke bed (9) inside is middle flue gas collection chamber (6), the outside is divided into the clean flue gas collection chamber (4) on top and the former flue gas cloth air chamber (10) of bottom by double-deck toroidal membrane (8), be communicated with by middle flue gas collection chamber grid (7) between described activated coke bed (9) and middle flue gas collection chamber (6), be communicated with by clean flue gas gas collection grid (5) between activated coke bed (9) and clean flue gas collection chamber (4), be communicated with by former flue gas air inlet grid (11) between activated coke bed (9) and former flue gas cloth air chamber (10), described clean flue gas collection chamber (4) top is provided with the exhaust pass (3) with its connection, described former flue gas cloth air chamber (10) bottom is provided with the former smoke inlet flue (12) with its connection, described activated coke bed (9) bottom is provided with double-deck dump skip, described double-deck dump skip comprises upper strata dump skip (13) and lower floor's dump skip (14), and the line in the line in described upper strata dump skip (13) sideline, outer panel bottom surface and lower floor's dump skip (14) outer panel end face sideline and upper strata dump skip (13) sideline, interior plate bottom surface and lower floor's dump skip (14) interior plate end face sideline and the angle of horizontal plane are less than the angle of repose of activated coke; Lower floor's dump skip (14) bottom is provided with discharge valve (15), and described middle flue gas collection chamber (6) bottom is provided with ash bucket (16), and ash bucket (16) bottom is provided with unloading valve (17); The cross section of described activated coke bed (9), former flue gas cloth air chamber (10), clean flue gas collection chamber (4) and whole tower body is annular.
2. a kind of novel mistake according to claim 1-convection current gas cleaning adsorption tower is characterized in that: the bus of flue gas collection chamber grid (7) and the angle α of vertical direction are 0.5～5 ° in the middle of described.
3. a kind of novel mistake according to claim 1-convection current gas cleaning adsorption tower, it is characterized in that: the angle of described upper strata dump skip (13) outer panel and horizontal plane is greater than the angle of interior plate and horizontal plane.
4. a kind of novel mistake according to claim 1-convection current gas cleaning adsorption tower is characterized in that: described distributing device (2) be shaped as cone.
5. a kind of novel mistake according to claim 1-convection current gas cleaning adsorption tower, it is characterized in that: the distance between described double-deck toroidal membrane (8) is two-layer is greater than 2 times of activated coke bed (9) average thickness.
6. a kind of novel mistake according to claim 6-convection current gas cleaning adsorption tower, it is characterized in that: the average thickness D of described activated coke bed (9) is 0.8～2.5m.
7. a kind of novel mistake according to claim 1-convection current gas cleaning adsorption tower is characterized in that: described double-deck dump skip adopts subregion to arrange that number of partitions is 1,2,3,4,6,9,12.
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| CN201310141717.3A CN103230724B (en) | 2013-04-22 | 2013-04-22 | New cross-convective flue gas purification absorption tower |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106669359A (en) * | 2017-02-27 | 2017-05-17 | 国电科学技术研究院 | Adsorption device for combined movable bed |
| CN107185404A (en) * | 2017-07-13 | 2017-09-22 | 中国科学院过程工程研究所 | A kind of gas cleaning absorption tower and its flue gas purifying method and application |
| 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 |
| CN107661681A (en) * | 2017-11-08 | 2018-02-06 | 中国科学院过程工程研究所 | A kind of flue gas pollutant purifying column |
| CN110090541A (en) * | 2019-05-23 | 2019-08-06 | 西安热工研究院有限公司 | A kind of system and method for activated coke combined desulfurization and denitration |
| CN111068458A (en) * | 2020-01-15 | 2020-04-28 | 中冶赛迪上海工程技术有限公司 | Unloading structure and adsorption tower of adsorption tower |
| CN111603890A (en) * | 2019-02-26 | 2020-09-01 | 中国石化工程建设有限公司 | Adsorption tower for preventing dust deposition in air chamber and method for treating flue gas by using adsorption tower |
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| CN203264529U (en) * | 2013-04-22 | 2013-11-06 | 西安西热锅炉环保工程有限公司 | Cross flow-convection flue gas purification and adsorption tower |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106669359A (en) * | 2017-02-27 | 2017-05-17 | 国电科学技术研究院 | Adsorption device for combined movable bed |
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| CN111603890A (en) * | 2019-02-26 | 2020-09-01 | 中国石化工程建设有限公司 | Adsorption tower for preventing dust deposition in air chamber and method for treating flue gas by using adsorption tower |
| CN111603890B (en) * | 2019-02-26 | 2022-06-17 | 中国石化工程建设有限公司 | Adsorption tower for preventing dust deposition in air chamber and method for treating flue gas by using adsorption tower |
| CN110090541A (en) * | 2019-05-23 | 2019-08-06 | 西安热工研究院有限公司 | A kind of system and method for activated coke combined desulfurization and denitration |
| CN111068458A (en) * | 2020-01-15 | 2020-04-28 | 中冶赛迪上海工程技术有限公司 | Unloading structure and adsorption tower of adsorption tower |
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Effective date of registration: 20170331 Address after: 710032 Xi'an, Yanta District, Qujiang Xiang Xiang Road, Xi'an Jiaotong University, west campus, building 317, room two, room 99 Patentee after: Xi'an Xire Boiler Environmental Protection Engineering Co., Ltd. Patentee after: Xi'an Thermal Power Research Institute Co., Ltd. Patentee after: Huaneng Group Technology Innovation Center Address before: 710032 Xi'an, Yanta District, Qujiang Xiang Xiang Road, Xi'an Jiaotong University, west campus, building 317, room two, room 99 Patentee before: Xi'an Xire Boiler Environmental Protection Engineering Co., Ltd. Patentee before: Xi'an Thermal Power Research Institute Co., Ltd. |
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