CN105056744A - Flue gas waste heat recovery and desulfurization integrated process and device - Google Patents
Flue gas waste heat recovery and desulfurization integrated process and device Download PDFInfo
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- CN105056744A CN105056744A CN201510597614.7A CN201510597614A CN105056744A CN 105056744 A CN105056744 A CN 105056744A CN 201510597614 A CN201510597614 A CN 201510597614A CN 105056744 A CN105056744 A CN 105056744A
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- desulfurization
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Abstract
The invention discloses a flue gas waste heat recovery and desulfurization integrated process and a device, relates to a coking flue gas waste heat recovery and treatment technology, and solves the problems that existing equipment is large in size, high in operation cost, and long in construction cycle. The device comprises a flue waste heat recovery device, a circulating water tank, a cooling tower, a desulfurization liquid circulating tank, a regeneration reactor, a plate-and-frame filter press and an impinging stream-liquid film desulfurizer; the flue waste heat recovery device is connected with the impinging stream-liquid film desulfurizer; the impinging stream-liquid film desulfurizer is provided with a cooling water inlet/outlet and a desulfurization liquid inlet/outlet which are respectively connected with the circulating water tank to form circulation and connected with the desulfurization liquid circulating tank to form circulation; the circulating water tank is connected with the cooling tower; and the desulfurization liquid circulating tank is sequentially connected with the regeneration reactor and the plate-and-frame filter press and connected with a filtrate storage tank trough a filtrate recovery pump. The flue gas waste heat recovery and desulfurization integrated process and the device disclosed by the invention effectively remove sulfur dioxide out of flue gas simultaneously when recovering flue waste heat, and is small in occupied area, low in production cost, low in operation cost, and high in desulfurization efficiency.
Description
The present invention relates to coking flue gas waste heat recovery treatment technology, be specifically related to a kind of flue gas waste heat recovery, desulfurating metallization processes and device.
Background technology
Coking flue residue heat recovery processing technique domestic at present, conventional method is, first arranges a set of device for recovering residual heat of flue for reclaiming flue residue heat, and then independently arrange a set of desulfurizer after device for recovering residual heat of flue.And its technique of traditional desulfurizer is absorption tower absorbing sulfur dioxide in flue, be divided three classes by liquid phase contact form: first kind gas is with bubble shape dispersion plate column, bubble absorbing tower, stirring bubble absorbing tower in the liquid phase; Equations of The Second Kind liquid is with droplet-like dispersion injector, venturi tube, spray tower in the gas phase; To be liquid carry out the packed absorber that contacts and film-falling absorption tower with membranaceous motion and gas phase to 3rd class.In tower gas-liquid two-phase the type of flow can adverse current also can and flow, usually adopt adverse current.System flow is, absorbent adds from tower top and flows from top to bottom, and with gas from below to up, gas-liquid exchanges the liquid absorbed and discharges at the bottom of tower, and the flue gas after purification is discharged from tower top.
In sum, existing flue gas waste heat recovery and desulfurizer are two independently system and devices, there is following defect: (1) equipment volume is huge, cost is high; (2) liquid-gas ratio is high, and gas band liquid measure is large, and demister cleaning is frequent; (3) entering tower flue gas needs through cooling processing; (4) operating cost is high; (5) long construction period.
For solving the above-mentioned defect that prior art exists, the present invention have developed a kind of flue gas waste heat recovery, desulfurization integrated device and technique thereof.
Summary of the invention
The present invention is that the equipment volume in order to solve prior art existence is large, operating cost is high, the problem of long construction period, and provides a kind of flue gas waste heat recovery, desulfurating metallization processes and device.
The present invention is achieved by the following technical solutions:
A kind of flue gas waste heat recovery, desulfurating metallization processes, step is:
The coking flue gas of high temperature is sent into waste-heat recovery device, 150-180 DEG C is down to after producing steam, then send in devulcanizer and react with sodium carbonate liquor the sulfur dioxide removing 98%, purifying smoke after desulfurization enters air by blower fan after demist, recirculated water carries out heat exchange cooling by serpentine cooler set in devulcanizer and flue gas, and in pipe the low-temperature cooling water of 30-40 DEG C and 180-80 DEG C of pipe outer wall high-temperature flue gas effect under on tube wall, generate condensate water liquid film layer uniformly, further scrubbing CO_2, recirculated water after heat exchange is cooled by cooling tower, liquid after desulfurization enters doctor solution circulating slot.
Further, when in doctor solution circulating slot, sodium sulphate, concentration of sodium bisulphite are greater than 100g/L, enter regeneration reactor and milk of lime reaction regeneration blasts compressed air simultaneously, emulsion after reacting completely is after plate and frame filter press is separated, obtain gypsum and NaOH supernatant, NaOH supernatant is sent to alkali lye circulating slot and continues desulfurization, and gypsum and iron-smelter grain slag sell cement plant by outer after 1:5 mixing match pressure ball or brickmaking.
Further, above-mentioned technique completes in a kind of flue gas waste heat recovery, desulfurization integrated device, comprises device for recovering residual heat of flue, circulating water chennel, cooling tower, doctor solution circulating slot, regeneration reactor, plate and frame filter press, percussion flow-liquid film devulcanizer; Wherein device for recovering residual heat of flue is connected with percussion flow-liquid film devulcanizer by connecting flue; Described percussion flow-liquid film devulcanizer is provided with cooling water import and export and doctor solution import and export, and wherein cooling water import and export is connected to form circulation with circulating water chennel respectively, and doctor solution import and export is connected to form circulation with doctor solution circulating slot respectively; Described circulating water chennel is connected with cooling tower by cooling tower circulating pump; Described doctor solution circulating slot connects regeneration reactor and plate and frame filter press successively by desulfurization regeneration pump, connects filtrate storage tank by filtrate recovery pump.
Further, plural independently head-on collision atomization desulfurization zone, liquid film desulfurization zone, demister is provided with in the cavity of described percussion flow-liquid film devulcanizer.
The top of described head-on collision atomization desulfurization zone is respectively arranged with multiple atomizer in opposite directions with low side and is connected with doctor solution circulating slot, in percussion flow-liquid film devulcanizer, absorbing liquid forms percussion flow in desulfurization one district center after air atomizing shower nozzle sprays at a high speed in opposite directions, i.e. the range of atomization of generation after hitting atomization desulfurization zone shock.
Described liquid film desulfurization zone is arranged in the cavity behind head-on collision atomization desulfurization zone, inside is fixed with coiled pipe, coiled pipe entery and delivery port is connected with circulating water chennel respectively by pipeline, during operation, the droplet of head-on collision atomization desulfurization zone is with the snakelike tube bank of flow of flue gas direction through serpentine cooler, liquid film is formed at cooling tube outer wall under the effect of the dew-point temperature of the inside and outside temperature difference of cooling tube, the little liquid film of atomization is filled with between tube bank, form liquid film desulfurization zone, i.e. the efficient mass transfer district of drop, liquid film.
The coiled pipe of described inside, liquid film desulfurization zone is staggered, and its effect is augmentation of heat transfer.
Described liquid film desulfurization zone is arranged in the cavity behind head-on collision atomization desulfurization zone, and inside is fixed with random packing layer.
When the present invention runs, the coking flue gas of 260-300 DEG C enters percussion flow-liquid film devulcanizer by cigarette temperature drop after waste-heat recovery device generation steam to 150-180 DEG C, be atomized desulfurization one district and liquid film desulfurization two district and sodium carbonate liquor (primer fluid) through head-on collision and react the sulfur dioxide removing 98%, the purifying smoke after desulfurization enters air by blower fan after demist; Recirculated water carries out heat exchange cooling by the serpentine cooler set by liquid film desulfurization two district and flue gas, and on tube wall, condensate water liquid film layer is generated, further scrubbing CO_2 uniformly under low-temperature cooling water (35 DEG C) and the effect of high-temperature flue gas (180-80 DEG C) high-low temperature difference of pipe outer wall in pipe.Recirculated water after heat exchange is cooled by cooling tower.Liquid after desulfurization enters doctor solution circulating slot.When sodium sulphate, concentration of sodium bisulphite in doctor solution circulating slot enter regeneration reactor when being greater than 100g/L and milk of lime reaction regeneration blasts compressed air simultaneously, emulsion after reacting completely, after plate and frame filter press is separated, obtains gypsum and NaOH supernatant.NaOH supernatant is sent to alkali lye circulating slot and continues desulfurization.Gypsum and iron-smelter grain slag sell cement plant by outer after 1:5 mixing match pressure ball or brickmaking.
Compared with prior art, the present invention factory modularization can make processing, short construction period, can while recovery flue residue heat during use, effectively remove sulfur dioxide in flue gas, there is modern design, floor space is little, manufacturing cost is low, operating cost is low, advantage that desulfuration efficiency is high.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
The FB(flow block) that Fig. 2 the present invention runs.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
A kind of flue gas waste heat recovery as shown in Figure 2, desulfurating metallization processes, step is:
The coking flue gas of high temperature is sent into waste-heat recovery device, 150-180 DEG C is down to after producing steam, then send in devulcanizer and react with sodium carbonate liquor the sulfur dioxide removing 98%, purifying smoke after desulfurization enters air by blower fan after demist, recirculated water carries out heat exchange cooling by serpentine cooler set in devulcanizer and flue gas, and in pipe the low-temperature cooling water of 30-40 DEG C and 180-80 DEG C of pipe outer wall high-temperature flue gas effect under on tube wall, generate condensate water liquid film layer uniformly, further scrubbing CO_2, recirculated water after heat exchange is cooled by cooling tower, liquid after desulfurization enters doctor solution circulating slot.When in doctor solution circulating slot, sodium sulphate, concentration of sodium bisulphite are greater than 100g/L, enter regeneration reactor and milk of lime reaction regeneration blasts compressed air simultaneously, emulsion after reacting completely is after plate and frame filter press is separated, obtain gypsum and NaOH supernatant, NaOH supernatant is sent to alkali lye circulating slot and continues desulfurization, and gypsum and iron-smelter grain slag sell cement plant by outer after 1:5 mixing match pressure ball or brickmaking.
A kind of flue gas waste heat recovery as shown in Figure 1, desulfurization integrated device, comprise device for recovering residual heat of flue 3, circulating water chennel 7, cooling tower 8, doctor solution circulating slot 4, regeneration reactor 10, plate and frame filter press 12, percussion flow-liquid film devulcanizer 2; Wherein device for recovering residual heat of flue 3 is connected with percussion flow-liquid film devulcanizer 2 by connecting flue; Described percussion flow-liquid film devulcanizer is provided with cooling water import and export and doctor solution import and export, wherein cooling water inlet is by cooling water circulating pump 5 and circulating water chennel 7, coolant outlet is connected to form circulation by pipeline and circulating water chennel 7, doctor solution import is connected with doctor solution circulating slot 4 with doctor solution circulating pump 1 by atomizer 17, and doctor solution outlet is connected to form circulation by pipeline and doctor solution circulating slot 4; Described circulating water chennel 7 is connected with cooling tower 8 by cooling tower circulating pump 6; Described doctor solution circulating slot 4 connects regeneration reactor 10, pneumatic diaphragm pump 11 and plate and frame filter press 12 successively by desulfurization regeneration pump 9, connects filtrate storage tank 13 by filtrate recovery pump 14.
Plural independently head-on collision atomization desulfurization zone 15, liquid film desulfurization zone 16, demister is provided with in the cavity of wherein percussion flow-liquid film devulcanizer; The top of head-on collision atomization desulfurization zone is respectively arranged with multiple atomizer 17 in opposite directions with low side and is connected with doctor solution circulating slot 4, and liquid film desulfurization zone 16 is arranged in the cavity behind head-on collision atomization desulfurization zone 15, and inside is fixed with coiled pipe or random packing layer.
Claims (8)
1. flue gas waste heat recovery, a desulfurating metallization processes, is characterized in that, step is:
The coking flue gas of high temperature is sent into waste-heat recovery device, 150-180 DEG C is down to after producing steam, then send in devulcanizer and react with sodium carbonate liquor the sulfur dioxide removing 98%, purifying smoke after desulfurization enters air by blower fan after demist, recirculated water carries out heat exchange cooling by serpentine cooler set in devulcanizer and flue gas, and in pipe the low-temperature cooling water of 30-40 DEG C and 180-80 DEG C of pipe outer wall high-temperature flue gas effect under on tube wall, generate condensate water liquid film layer uniformly, further scrubbing CO_2, recirculated water after heat exchange is cooled by cooling tower, liquid after desulfurization enters doctor solution circulating slot.
2. a kind of flue gas waste heat recovery according to claim 1, desulfurating metallization processes, it is characterized in that, when in doctor solution circulating slot, sodium sulphate, concentration of sodium bisulphite are greater than 100g/L, enter regeneration reactor and milk of lime reaction regeneration blasts compressed air simultaneously, emulsion after reacting completely is after plate and frame filter press is separated, obtain gypsum and NaOH supernatant, NaOH supernatant is sent to alkali lye circulating slot and continues desulfurization, and gypsum and iron-smelter grain slag press 1:5 mixing match pressure ball or brickmaking.
3. complete flue gas waste heat recovery according to claim 1, the flue gas waste heat recovery of desulfurating metallization processes, desulfurization integrated device, it is characterized in that, comprise device for recovering residual heat of flue (3), circulating water chennel (7), cooling tower (8), doctor solution circulating slot (4), regeneration reactor (10), plate and frame filter press (12), percussion flow-liquid film devulcanizer (2); Wherein said device for recovering residual heat of flue (3) is connected with percussion flow-liquid film devulcanizer (2) by connecting flue; Described percussion flow-liquid film devulcanizer (2) is provided with cooling water import and export and doctor solution import and export, wherein cooling water import and export is connected to form circulation with circulating water chennel (7) respectively, and doctor solution import and export is connected to form circulation with doctor solution circulating slot (4) respectively; Described circulating water chennel (7) is connected with cooling tower (8) by cooling tower circulating pump (6); Described doctor solution circulating slot (4) connects regeneration reactor (10) and plate and frame filter press (12) successively by desulfurization regeneration pump (9), connects filtrate storage tank (13) by filtrate recovery pump (14).
4. a kind of flue gas waste heat recovery according to claim 3, desulfurization integrated device, it is characterized in that, in the cavity of described percussion flow-liquid film devulcanizer (2), be provided with plural independently head-on collision atomization desulfurization zone (15), liquid film desulfurization zone (16), demister.
5. a kind of flue gas waste heat recovery according to claim 4, desulfurization integrated device, it is characterized in that, the top of described head-on collision atomization desulfurization zone (15) is respectively arranged with multiple atomizer (17) in opposite directions with low side and is connected with doctor solution circulating slot (4).
6. a kind of flue gas waste heat recovery according to claim 4, desulfurization integrated device, is characterized in that, described liquid film desulfurization zone (16) is arranged in the cavity after head-on collision atomization desulfurization zone (15), and inside is fixed with random packing layer.
7. a kind of flue gas waste heat recovery according to claim 4, desulfurization integrated device, it is characterized in that, described liquid film desulfurization zone (16) is arranged in the cavity after head-on collision atomization desulfurization zone (15), inside is fixed with coiled pipe, and coiled pipe entery and delivery port is connected with circulating water chennel (7) respectively by pipeline.
8. a kind of flue gas waste heat recovery according to claim 7, desulfurization integrated device, is characterized in that, the coiled pipe of described inside, liquid film desulfurization zone (16) is staggered.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106076091A (en) * | 2016-06-24 | 2016-11-09 | 山西长林能源科技有限公司 | A kind of head-on collision injection gravity sedimentation type desulfurizer and method |
| CN107055486A (en) * | 2017-04-06 | 2017-08-18 | 赤峰云铜有色金属有限公司 | A kind of flue gas acid preparing process waste heat Application way |
| CN108686478A (en) * | 2017-04-06 | 2018-10-23 | 中国石油化工股份有限公司 | The processing method and device of a kind of flue gas desulfurization and desulfurization wastewater |
| CN113856417A (en) * | 2021-11-01 | 2021-12-31 | 仁化县闽盛建材有限公司 | Flue gas desulfurization and purification device with heat recovery function for brickyard kiln |
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| CN101254392A (en) * | 2007-02-28 | 2008-09-03 | 向瑞先 | Energy-saving type sodium sulphite circulation desulfurizing device and method |
| CN102980171A (en) * | 2011-09-06 | 2013-03-20 | 陈兴元 | Economizer capable of recycling waste heat of flue in depth and concealing, desulfurizing and aspirating flue of coal-fired boiler |
| CN204996323U (en) * | 2015-09-20 | 2016-01-27 | 山西长林环保机械设备有限公司 | Residual heat from flue gas , desulfurization integrated device |
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2015
- 2015-09-20 CN CN201510597614.7A patent/CN105056744B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101254392A (en) * | 2007-02-28 | 2008-09-03 | 向瑞先 | Energy-saving type sodium sulphite circulation desulfurizing device and method |
| CN102980171A (en) * | 2011-09-06 | 2013-03-20 | 陈兴元 | Economizer capable of recycling waste heat of flue in depth and concealing, desulfurizing and aspirating flue of coal-fired boiler |
| CN204996323U (en) * | 2015-09-20 | 2016-01-27 | 山西长林环保机械设备有限公司 | Residual heat from flue gas , desulfurization integrated device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106076091A (en) * | 2016-06-24 | 2016-11-09 | 山西长林能源科技有限公司 | A kind of head-on collision injection gravity sedimentation type desulfurizer and method |
| CN107055486A (en) * | 2017-04-06 | 2017-08-18 | 赤峰云铜有色金属有限公司 | A kind of flue gas acid preparing process waste heat Application way |
| CN108686478A (en) * | 2017-04-06 | 2018-10-23 | 中国石油化工股份有限公司 | The processing method and device of a kind of flue gas desulfurization and desulfurization wastewater |
| CN113856417A (en) * | 2021-11-01 | 2021-12-31 | 仁化县闽盛建材有限公司 | Flue gas desulfurization and purification device with heat recovery function for brickyard kiln |
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