CN104959016A - Double-stage sectionalized spray desulfurization tower - Google Patents
Double-stage sectionalized spray desulfurization tower Download PDFInfo
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- CN104959016A CN104959016A CN201510317110.5A CN201510317110A CN104959016A CN 104959016 A CN104959016 A CN 104959016A CN 201510317110 A CN201510317110 A CN 201510317110A CN 104959016 A CN104959016 A CN 104959016A
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Abstract
The invention discloses a double-stage sectionalized spray desulfurization tower. The double-stage sectionalized spray desulfurization tower comprises a tower body, a gas and liquid redistribution device is arranged between an upper stage cycle desulfurization section and a lower stage cycle desulfurization section, the gas and liquid redistribution device comprises an inclined baseboard, a gas guide tube, a gas and liquid separation board and a flow gas distributor, the lowest contact position of the inclined baseboard and the tower body is provided with a liquid flow hole, the gas guide tube penetrates through the inclined baseboard, the gas-liquid separation board is fixed above the gas guide tube, and the flue gas distributor is fixed above the gas-liquid separation board. The double-stage sectionalized spray desulfurization tower has the following advantages: a distance between a spray layer and the gas and liquid redistribution device is reduced, and the height and the running energy consumption of the desulfurization tower are reduced; the gas and liquid redistribution device separates washing slurry cycles of the upper stage cycle desulfurization section and the lower stage cycle desulfurization section, so liquid leakage is avoided; and running under relatively-independent different pH values is controlled, so the desulfurization efficiency of the upper stage cycle desulfurization section under a high pH value is high, and the absorbent utilization rate and the byproduct quality of the lower stage cycle desulfurization section under a low pH value are improved.
Description
Technical field
The present invention relates to twin-stage subregion spray desulfurizing tower.
Background technology
According to " coal electricity energy-saving and emission-reduction upgrading and transformation action plan (2014-the year two thousand twenty) ", require that the newly-built Thermal generation unit in eastern region reaches combustion engine standard substantially, under benchmark oxygen content 6% condition, emission limit is flue dust: 10mg/m
3, SO
2: 35mg/m
3; Some areas government has put into effect stricter policy, regulation, and due to reasons such as environmental carrying capacity are limited, the Yangtze River Delta, Pearl River Delta Deng Di partial fuel coal power plant with reference to combustion engine standard limited value, require that emission limit is flue dust: 5mg/m
3, SO
2: 35mg/m
3.In order to reach emission request, after stove, the desulfuration efficiency of flue gas desulphurization system often needs to reach more than 98%, conventional single cycle wet desulfurization system, or can not steady in a long-termly under high desulfurization efficiency run, or the utilization rate of desulfurizing agent is low; For this reason, technical staff has developed double circulation desulphurization technology, the pH value circulatory system different with two height is washed flue gas, obtain the utilization rate of higher desulfuration efficiency and raising desulfurizing agent, need to arrange drip tray or catch tray between two different pH value circulation cleaning systems, drip tray or catch tray are arranged in the middle of the top of low ph value circulated sprinkling system.
The layout of drip tray or catch tray, or generation leakage makes the slurries of two different pH value circulatory systems not balance, and affects stable operation; Or making flue gas tend to absorption tower wall flowing, when adding that spray system designs, the sprinkle density at nearly tower wall place is less than the sprinkle density in the middle of tower, and drip tray bottom smoke distribution uniformity is worsened further.In order to ensure that spraying layer region smoke distribution is even, drip tray or catch tray need have larger space with spraying layer, add the height of tower, make investment and energy consumption increase.
Summary of the invention
The object of the present invention is to provide twin-stage subregion spray desulfurizing tower, effectively can solve existing drip tray and arrange that the unreasonable tower height degree that causes increases, make the problem that investment and energy consumption rise.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions: twin-stage subregion spray desulfurizing tower, comprise tower body, gas approach is provided with below described tower body, tower body top is provided with exhanst gas outlet, higher level's circulation desulfurization district and circulation desulfurization district of subordinate is provided with in tower body, gas-liquid redistributor is provided with between described higher level's circulation desulfurization district and circulation desulfurization district of subordinate, described gas-liquid redistributor comprises inclined floor, wireway, gas-liquid demarcation strip and flue gas distributor, the minimum contact position of described hang plate and tower body has fluid hole, wireway is located on inclined floor, gas-liquid demarcation strip is fixed on the top of wireway, described flue gas distributor is fixed on the top of gas-liquid demarcation strip.
Preferably, described flue gas distributor is for opening the spaced apart rod in round-meshed sieve plate goods yard, and cross section percent opening is 30% ~ 50%; Ensureing enough flue gas percent of pass, flue gas and desulfurization slurry can made to mix simultaneously.
Preferably, the angle between described inclined floor and horizontal plane is 5 ~ 20 °, and the center of inclined floor has circular hole, and Circularhole diameter is 0.55 ~ 0.85 times of tower body diameter, and circular hole surrounding arranges wireway; The good desulfurization slurry collecting top, reduce whole height, the setting of circular hole and wireway rises to make underlying gas have on enough spaces simultaneously as far as possible.
Preferably, described gas-liquid demarcation strip is positioned at directly over wireway, and gas-liquid demarcation strip is conical, coning angle 140 ~ 170 °, gas-liquid demarcation strip basal diameter 200 ~ 600mm larger than wireway external diameter; The gas of rising can evenly upwards be flowed from surrounding.
Preferably, also demister is provided with in tower body before described higher level's circulation desulfurization district and exhanst gas outlet, described higher level's circulation desulfurization district comprises higher level's spraying layer, higher level's loop slurry case and higher level's circulating pump, described higher level's spraying layer is arranged in tower body, higher level's loop slurry case is connected with higher level's spraying layer by pipeline, described pipeline is provided with higher level's circulating pump, and described fluid hole is connected with higher level's loop slurry case by pipeline; Form good higher level's circulatory system.
Preferably, higher level's agitating device is provided with in described higher level's loop slurry case; Solid particle in higher level's slurry tank is suspended do not precipitate.
Preferably, circulation desulfurization district of described subordinate comprises subordinate's spraying layer, subordinate's loop slurry case and subordinate's circulating pump, described subordinate spraying layer is positioned at the top of tower body gas approach, subordinate's spraying layer is connected with subordinate loop slurry case by subordinate's circulating pump, and higher level's loop slurry case is communicated with subordinate loop slurry case by overflow pipe; Form good subordinate's circulatory system.
Preferably, subordinate's agitating device is provided with in described subordinate loop slurry case; Solid particle in subordinate's slurry tank is suspended do not precipitate.
Preferably, be equipped with aeration tube in described higher level's loop slurry case and subordinate's loop slurry case, described aeration tube is by oxidation fan air feed; For the sulfite oxidation in loop slurry case is become sulfate.
Preferably, the distance of described subordinate spraying layer and inclined floor is not less than 1.2m, and the distance of gas-liquid demarcation strip and flue gas distributor is not less than 0.9m, and the distance of flue gas distributor and higher level's spraying layer is 1.5 ~ 2m; Ensure that flue gas has enough risings and blending space.
Compared with prior art, advantage of the present invention is: arrange gas-liquid redistributor and the flue gas of subordinate's spray system is gone out from centre, higher level's spray system flue gas enters circumference and goes out and be provided with flue gas distributor from centre, make the superior and the subordinate's circulation desulfurization district smoke distribution even, reduce the distance of spraying layer and gas-liquid redistributor, reduce height and the operation energy consumption of desulfurizing tower.Gas-liquid redistributor make the detergent milk in circulation desulfurization district of the superior and the subordinate be dutiful every, do not produce leakage, run under caning be controlled in relatively independent different pH value, make higher level's circulation desulfurization district of high ph-values obtain higher desulfuration efficiency, the circulation desulfurization district of subordinate of low ph value improves the utilization rate of absorbent and the quality of accessory substance.
Accompanying drawing explanation
Fig. 1 is the structural representation of twin-stage subregion spray desulfurizing tower of the present invention.
Detailed description of the invention
Consult the embodiment that Fig. 1 is twin-stage subregion spray desulfurizing tower of the present invention, twin-stage subregion spray desulfurizing tower, comprise tower body 2, gas approach 1 is provided with below described tower body 2, tower body 2 top is provided with exhanst gas outlet 3, be provided with higher level's circulation desulfurization district and circulation desulfurization district of subordinate in tower body 2, between described higher level's circulation desulfurization district and circulation desulfurization district of subordinate, be provided with gas-liquid redistributor.
Circulation desulfurization district of described subordinate comprises subordinate's spraying layer 6, subordinate's loop slurry case 4 and subordinate's circulating pump 5, described subordinate spraying layer 6 is positioned at the top of tower body 2 gas approach 1, subordinate's spraying layer 6 is connected with subordinate loop slurry case 4 by subordinate's circulating pump 5, accessory substance excavationg pump 23 is connected with bottom subordinate loop slurry case 4 by pipeline, for the discharge of accessory substance, in described subordinate loop slurry case 4, be provided with subordinate's agitating device 19.
Demister 10 is also provided with in tower body 2 before described higher level's circulation desulfurization district and exhanst gas outlet 3, described higher level's circulation desulfurization district comprises higher level's spraying layer 9, higher level's loop slurry case 7 and higher level's circulating pump 8, described higher level's spraying layer 9 is arranged in tower body 2, higher level's loop slurry case 7 is connected with higher level's spraying layer 9 by pipeline, described pipeline is provided with higher level's circulating pump 8, described fluid hole 11 is connected with higher level's loop slurry case 7 by pipeline, is provided with higher level's agitating device 20 in described higher level's loop slurry case 7.
Higher level's loop slurry case 7 is communicated with subordinate loop slurry case 4 by overflow pipe 22, is equipped with aeration tube 17 in described higher level's loop slurry case 7 and subordinate's loop slurry case 4, and described aeration tube 17 is by oxidation fan 16 air feed.
Described gas-liquid redistributor comprises inclined floor 12, wireway 13, gas-liquid demarcation strip 14 and flue gas distributor 15, the minimum contact position of described hang plate and tower body 2 has fluid hole 11, wireway 13 is located on inclined floor 12, gas-liquid demarcation strip 14 is fixed on the top of wireway 13, described flue gas distributor 15 is fixed on the top of gas-liquid demarcation strip 14, angle between described inclined floor 12 and horizontal plane is 5 ~ 20 °, the center of inclined floor 12 has circular hole, Circularhole diameter is 0.55 ~ 0.85 times of tower body 2 diameter, circular hole surrounding arranges wireway 13, described gas-liquid demarcation strip 14 is positioned at directly over wireway 13, gas-liquid demarcation strip 14 is conical, coning angle 140 ~ 170 °, gas-liquid demarcation strip 14 basal diameter 200 ~ 600mm larger than wireway 13 external diameter, described flue gas distributor 15 is for opening the spaced apart rod in round-meshed sieve plate goods yard, cross section percent opening is 30% ~ 50%.
Described subordinate spraying layer 6 is not less than 1.2m with the distance of inclined floor 12, and gas-liquid demarcation strip 14 is not less than 0.9m with the distance of flue gas distributor 15, and flue gas distributor 15 is 1.5 ~ 2m with the distance of higher level's spraying layer 9.
Former flue gas enters tower body 2 by gas approach, in the desulfurization slurry countercurrent washing that circulation desulfurization district of subordinate is provided by subordinate's circulating pump 5, removes part SO
2slurries after desulfurization fall into subordinate's loop slurry case 4, flue gas after washing is by after being arranged on the wireway 13 in the middle of inclined floor 12, higher level's circulation desulfurization district is entered through flue gas distributor 15, high pH value (5.8-6.4) the desulfurization slurry countercurrent washing that equally distributed flue gas is provided by higher level's circulating pump 8 when rising, removes SO further
2, final SO
2removal efficiency can reach more than 99.6%, the slurries after desulfurization, after gas-liquid demarcation strip 14 stops, fall into the inclination annular ditch be made up of inclined floor 12 and wireway 13 along surrounding, and flow out tower body 2 from the fluid hole 11 of lowest part and enter subordinate's loop slurry case 4.Flue gas after two-stage washing is by discharging from exhanst gas outlet 3 after demister 10 demist.
Arranging gas-liquid redistributor makes the flue gas of subordinate's spray system go out from centre, higher level's spray system flue gas enters circumference and goes out and be provided with flue gas distributor from centre, make the superior and the subordinate's circulation desulfurization district smoke distribution even, reduce the distance of spraying layer and gas-liquid redistributor, reduce height and the operation energy consumption of desulfurizing tower.Gas-liquid redistributor make the detergent milk in circulation desulfurization district of the superior and the subordinate be dutiful every, do not produce leakage, run under caning be controlled in relatively independent different pH value, make higher level's circulation desulfurization district of high ph-values obtain higher desulfuration efficiency, the circulation desulfurization district of subordinate of low ph value improves the utilization rate of absorbent and the quality of accessory substance.
The foregoing is only specific embodiments of the invention, but technical characteristic of the present invention is not limited thereto, any those skilled in the art is in the field of the invention, and the change done or modification are all encompassed among the scope of the claims of the present invention.
Claims (5)
1. twin-stage subregion spray desulfurizing tower, comprise tower body (2), described tower body (2) below is provided with gas approach (1), tower body (2) top is provided with exhanst gas outlet (3), higher level's circulation desulfurization district and circulation desulfurization district of subordinate is provided with in tower body (2), it is characterized in that: between described higher level's circulation desulfurization district and circulation desulfurization district of subordinate, be provided with gas-liquid redistributor, described gas-liquid redistributor comprises inclined floor (12), wireway (13), gas-liquid demarcation strip (14) and flue gas distributor (15), the minimum contact position of described hang plate and tower body (2) has fluid hole (11), wireway (13) is located on inclined floor (12), gas-liquid demarcation strip (14) is fixed on the top of wireway (13), described flue gas distributor (15) is fixed on the top of gas-liquid demarcation strip (14).
2. twin-stage subregion spray desulfurizing tower as claimed in claim 1, is characterized in that: described flue gas distributor (15) is for opening round-meshed sieve plate or being spaced apart rod, and cross section percent opening is 30% ~ 50%.
3. twin-stage subregion spray desulfurizing tower as claimed in claim 1, it is characterized in that: the angle between described inclined floor (12) and horizontal plane is 5 ~ 20 °, the center of inclined floor (12) has circular hole, Circularhole diameter is 0.55 ~ 0.85 times of tower body (2) diameter, and circular hole surrounding arranges wireway (13).
4. the twin-stage subregion spray desulfurizing tower as described in claim 1 or 3, it is characterized in that: described gas-liquid demarcation strip (14) is positioned at directly over wireway (13), gas-liquid demarcation strip (14) is conical, coning angle 140 ~ 170 °, gas-liquid demarcation strip (14) basal diameter 200 ~ 600mm larger than wireway (13) external diameter.
5. twin-stage subregion spray desulfurizing tower as claimed in claim 1, it is characterized in that: circulation desulfurization district of described subordinate comprises subordinate's spraying layer (6), described subordinate spraying layer (6) is not less than 1.2m with the distance of inclined floor (12), gas-liquid demarcation strip (14) is not less than 0.9m with the distance of flue gas distributor (15), and flue gas distributor (15) is 1.5 ~ 2m with the distance of higher level's spraying layer (9).
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| CN201510317110.5A CN104959016B (en) | 2015-06-10 | 2015-06-10 | Twin-stage subregion spray desulfurizing tower |
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| CN201510317110.5A CN104959016B (en) | 2015-06-10 | 2015-06-10 | Twin-stage subregion spray desulfurizing tower |
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| CN104959016B CN104959016B (en) | 2017-08-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109069985A (en) * | 2016-04-27 | 2018-12-21 | Lab 有限公司 | The method and facility of wet type desulfurizing are carried out for the waste gases and smoke to seagoing vessel engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109069985A (en) * | 2016-04-27 | 2018-12-21 | Lab 有限公司 | The method and facility of wet type desulfurizing are carried out for the waste gases and smoke to seagoing vessel engine |
| CN109069985B (en) * | 2016-04-27 | 2022-01-28 | Lab 有限公司 | Method and installation for wet desulfurization of exhaust fumes of marine engines |
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|---|---|
| CN104959016B (en) | 2017-08-22 |
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Effective date of registration: 20200927 Address after: 311800 No. 88 Wangyun Road, Chengguan Town, Zhuji City, Shaoxing City, Zhejiang Province Patentee after: ZHEJIANG FEIDA ENVIRONMENTAL SCIENCE & TECHNOLOGY Co.,Ltd. Address before: 311800 Zhejiang city of Shaoxing province Zhuji City, Wang Yun Lu No. 88 Patentee before: ZHEJIANG FEIDA ENVIRONMENTAL SCIENCE & TECHNOLOGYCO., Ltd. Patentee before: ZHEJIANG FEIDA ENVIRONMENTAL SCIENCE & TECHNOLOGY Co.,Ltd. |
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