CN1331572C - Gypsum pulp dewatering device and method for wetting smoke desulfurizing system - Google Patents
Gypsum pulp dewatering device and method for wetting smoke desulfurizing system Download PDFInfo
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- CN1331572C CN1331572C CNB200510041492XA CN200510041492A CN1331572C CN 1331572 C CN1331572 C CN 1331572C CN B200510041492X A CNB200510041492X A CN B200510041492XA CN 200510041492 A CN200510041492 A CN 200510041492A CN 1331572 C CN1331572 C CN 1331572C
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Abstract
The present invention relates to a gypsum slurry dewatering device and a method in a wet smoke gas desulfurizing system, which is a gypsum dewatering system used for the field of the wet smoke gas desulfurizing system. The device is composed of a limestone slurry box (2), a limestone slurry pump (2.1), a limestone slurry back flow adjusting valve (2.2), an absorbing tower (3), a gypsum slurry discharging pump (5), an adjusting valve (5.1) of a back flow pipe of the gypsum slurry discharge pump, a vacuum belt conveyor (6), a filtered solution water tank (7), a gypsum swirler (8), an overflow box (8.1) and a waste water swirler (10). The large overflow part of the gypsum swirler is led out from the upper part of the overflow box and is connected with the downstream side of the adjusting valve of the back flow pipe of the gypsum slurry discharging pump, and the small part of the gypsum swirler is led out from the lower part of the overflow box and is connected with the waste water swirler. The filtered solution water of the vacuum belt conveyor is mixed with FGD technology supplementing water in the filtered solution water tank, and filtered solution water with low solid quantity is obtained. The flushing water of a demister is the filtered solution water, which greatly reduces the technology water quantity of a main system.
Description
Technical field
The present invention relates to a kind of wet method fume desulfurizing system (WFGD) gypsum dehydration and lime stone slurry induction system of being used for, belong to the technical field of wet process of FGD device fabrication.
Background technology
Gypsum dehydration and lime stone slurry induction system adopt following technological process in known this field at present, gypsum slurries enters the gypsum cyclone after discharging desulfuration absorbing tower, gypsum cyclone underflow enters vacuum belt machine and filters, filtrate is gone slurrying or is directly returned tower, a gypsum cyclone overflow part is removed the waste-water vortex device, and a part is returned the absorption tower.There is following problem in this flow process: the one, and the gypsum discharge rate is handled load variations with the absorption tower and is changed, so at gypsum discharge pipe end a return duct must be set, makes excessive gypsum slurries return the absorption tower.Just flow can not be too little in order to prevent fouling from will to guarantee certain flow rate for discharge line.So all adopt big the backflow at present, guarantee that discharge pipe and return duct do not stop up, the flow of gypsum excavationg pump is far longer than the necessary gypsum delivery flow of busy hour desulphurization system.Investment and operating cost increase.The 2nd, tower is directly returned in the overflow of gypsum cyclone, is difficult for regulating absorbing tower liquid-level, especially multitower and share a cover gypsum dehydration device when boiler load changes, and when having tower load low, not moisturizing liquid level also can constantly rise.The 3rd, gypsum dehydration system can produce a large amount of filtrates, and the filtrate solid content is low, normally directly returns the absorption tower.And the absorption tower demisting device needs a large amount of flushing waters, and when the absorption tower load was low, often demister flushing water and gypsum dehydration system water had surpassed absorption tower institute water requirement, and this moment, absorbing tower liquid-level was difficult to control.
Summary of the invention
Technical problem:, the invention provides calcium plaster dewater unit and dewatering in a kind of wet method fume desulfurizing system in order to overcome the problem that existing gypsum dehydration exists.This device and method makes full use of the low filtrate water of solid content, reduces system's fouling, and makes the liquid level on absorption tower more easy to control.
Technical scheme: the calcium plaster dewater unit in the wet method fume desulfurizing system of the present invention is made up of lime stone slurry case, limestone slurry liquid pump, lime stone slurry return valve, absorption tower, gypsum slurries excavationg pump, gypsum slurries excavationg pump return duct control valve, vacuum belt machine, filtrate water box, gypsum cyclone, spill box, waste-water vortex device; Wherein, the Lower Half of lime stone slurry case is connected with the Lower Half on absorption tower by the limestone slurry liquid pump, and pulping process water connects the first half of lime stone slurry case and is connected with the Lower Half on absorption tower by the lime stone slurry return valve; Top in the absorption tower is provided with demister, the import of gypsum slurries excavationg pump is connected with the Lower Half on absorption tower, gypsum slurries is discharged delivery side of pump and is connected a termination gypsum cyclone of gypsum slurries excavationg pump return duct control valve, the Lower Half on another termination absorption tower with the gypsum cyclone; The first half on absorption tower is connected with filtrate water box; The bottom of gypsum cyclone is connected with filtrate water box by vacuum belt machine, and the top of gypsum cyclone connects spill box, and the top of spill box also is connected with the Lower Half on absorption tower, and the bottom of spill box connects the waste-water vortex device.The fresh water (FW) supplementing water is entered filtrate water box, make the filtrate water solid content lower, the filtrate of filtrate water box is removed the day with fog flushing respectively and is back to gypsum slurries excavationg pump return duct control valve downstream, absorption tower through the filtrate water pump.
Dehydration method is:
A. gypsum cyclone overflowing liquid major part is overflowed from spill box top and inserts gypsum slurries excavationg pump return duct control valve downstream, absorption tower,
B. gypsum cyclone overflowing liquid fraction is led to waste-water vortex device or directly discharge from the spill box bottom,
C. the fresh water (FW) supplementing water is entered filtrate water box, make the filtrate water solid content lower, the filtrate of filtrate water box is removed the day with fog flushing respectively and is back to gypsum slurries excavationg pump return duct control valve downstream, absorption tower through the filtrate water pump,
D. lime stone pulping process water 1 is inserted lime stone slurry return valve downstream.
Calcium plaster dehydration and the technological process of lime stone slurry induction system dewatering are after gypsum cyclone overflowing liquid major part is overflowed access absorption tower gypsum excavationg pump return duct control valve from overflowing liquid collection upper box part in the wet method fume desulfurizing system, fraction leads to waste-water vortex device or directly discharge from overflowing liquid collection lower box part, the fresh water (FW) moisturizing enters filtrate water box, make the filtrate water solid content lower, the filtrate water pump discharge is removed day with fog flushing and absorption tower gypsum excavationg pump return duct respectively.The absorption tower load is high more, and gypsum discharge slurries are many more, and the cyclone overflowing liquid is also many more, and absorption tower evaporation moisture content is many more, and it is big more that this moment, filtrate water box was discharged filtrate, just in time can satisfy demister washing water quantity height, the requirement that gypsum slurries return duct washing water quantity is many.After the gypsum slurries return duct adopts cyclone overflowing liquid and filtrate water flushing, be to prevent that the return duct fouling from keeping a bigger backflow unlike existing system when load is high.Can reduce the requirement of exerting oneself of calcium plaster liquid pump greatly, reduce investment outlay and operating cost.Equally, load when high when the absorption tower, the slurrying water consumption is big, phegma reduces, if after the slurrying water received lime stone slurry pump return duct control valve, also can reduce to guarantee enough washing water quantity scouring stone lime stone slush pump return ducts under the condition that lime stone slurry pumps power.The demister flushing water adopts filtrate water, has significantly reduced the non-adjustable technology water yield that saves land and enter main system, has increased adjusting flexibility and adjustable extent, the absorbing tower liquid-level when having guaranteed underload and the water balance of system of system process water.Simultaneously can replace out the rate of water make-up of lime stone slurrying to make it need not use corrosive filtrate water again, simplify the design of lime stone preparation system, reduce investment.
Beneficial effect: by improvement, reduced the exert oneself requirement of system, reduced investment and operating cost to the gypsum slurries emptying pump to the calcium plaster dewatering system.For the system that the situation and the multitower of underload share gypsum dehydration, the gypsum dehydration system after the improvement can be good at regulating absorbing tower liquid-level, has solved the problem of systematic water balance, has effectively reduced the water consumption.Reduce a large amount of conveyance conduits, simplified system, dwindled the corrosion coverage, save anticorrosion expense.
Description of drawings
The present invention is further described below in conjunction with accompanying drawing.
Fig. 1 is a general structure schematic diagram of the present invention.
Have among the figure: pulping process water 1, lime stone slurry case 2, limestone slurry liquid pump 2.1, lime stone slurry return valve 2.2, absorption tower 3, demister 4, gypsum slurries excavationg pump 5, gypsum slurries excavationg pump return duct control valve 5.1, vacuum belt machine 6, filtrate water box 7, gypsum cyclone 8, gypsum cyclone spill box 8.1, fresh water (FW) supplementing water 9, waste-water vortex device 10, filtrate water pump 11.
The specific embodiment
Calcium plaster dewatering system of the present invention, lime stone slurry induction system are made up of lime stone slurry case 2, limestone slurry liquid pump 2.1, lime stone slurry return valve 2.2, absorption tower 3, gypsum slurries excavationg pump 5, gypsum slurries excavationg pump return duct control valve 5.1, vacuum belt machine 6, filtrate water box 7, gypsum cyclone 8, spill box 8.1, waste-water vortex device 10; Wherein, the Lower Half of lime stone slurry case 2 is connected by the Lower Half of limestone slurry liquid pump 2.1 with absorption tower 3, and pulping process water 1 connects the first half of lime stone slurry case 2 and is connected by the Lower Half of lime stone slurry return valve 2.2 with absorption tower 3; Top in absorption tower 3 is provided with demister 4, the import of gypsum slurries excavationg pump 5 is connected with the Lower Half on absorption tower 3, the outlet of gypsum slurries excavationg pump 5 is connected with gypsum cyclone 8, one termination gypsum cyclone 8 of gypsum slurries excavationg pump return duct control valve 5.1, the Lower Half on another termination absorption tower 3; The first half on absorption tower 3 is connected with filtrate water box 7; The bottom of gypsum cyclone 8 is connected with filtrate water box 7 by vacuum belt machine 6, and the top of gypsum cyclone 8 connects spill box 8.1, and the top of spill box 8.1 also is connected with the Lower Half on absorption tower 3, and the bottom of spill box 8.1 connects waste-water vortex device 10.Fresh water (FW) supplementing water 9 is entered filtrate water box 7, make the filtrate water solid content lower, the filtrate of filtrate water box 7 is removed day with fog 4 flushings respectively and is back to absorption tower gypsum slurries excavationg pump 5 return duct control valves 5.1 downstreams through filtrate water pump 11,
Dehydration method is:
A. gypsum cyclone 8 overflowing liquid major parts are overflowed from spill box 8.1 tops and insert gypsum slurries excavationg pump return duct control valve 5.1 downstreams, absorption tower,
B. with gypsum cyclone 8 overflowing liquid fractions from spill box 8.1) portion leads to waste-water vortex device 10 or directly discharges,
C. fresh water (FW) supplementing water 9 is entered filtrate water box 7, make the filtrate water solid content lower, the filtrate of filtrate water box 7 is removed day with fog 4 flushings respectively and is back to absorption tower gypsum slurries excavationg pump 5 return duct control valves 5.1 downstreams through filtrate water pump 11,
D. lime stone pulping process water 1 is inserted lime stone slurry return valve 2.2 downstreams.
Claims (2)
1. the calcium plaster dewater unit in the wet method fume desulfurizing system, this device comprise that lime stone slurry case (2), absorption tower (3), gypsum slurries excavationg pump (5), gypsum slurries discharge blowback vacuum belt machine (6), filtrate water box (7), gypsum cyclone (8); The Lower Half that it is characterized in that lime stone slurry case (2) is connected by the Lower Half of limestone slurry liquid pump (2.1) with absorption tower (3), and pulping process water (1) connects the first half of lime stone slurry case (2) and is connected by the Lower Half of lime stone slurry return valve (2.2) with absorption tower (3); Top in absorption tower (3) is provided with demister (4), the import of gypsum slurries excavationg pump (5) is connected with the Lower Half of absorption tower (3), the outlet of gypsum slurries excavationg pump (5) is connected with gypsum cyclone (8), one termination gypsum cyclone (8) of gypsum slurries excavationg pump return duct control valve (5.1), the Lower Half on another termination absorption tower (3); The first half on absorption tower (3) is connected with filtrate water box (7) through filtrate water pump (11); The bottom of gypsum cyclone (8) is connected with filtrate water box (7) by vacuum belt machine (6), the top of gypsum cyclone (8) connects spill box (8.1), the top of spill box (8.1) also is connected with the Lower Half of absorption tower (3), and the bottom of spill box (8.1) connects waste-water vortex device (10); Fresh water (FW) supplementing water (9) is entered filtrate water box (7), make the filtrate water solid content lower, the filtrate of filtrate water box (7) is removed day with fog (4) respectively through filtrate water pump (11) and is washed and be back to absorption tower gypsum slurries excavationg pump (5) return duct control valve (5.1) downstream.
2. dewatering that is used for the calcium plaster dewater unit of the described wet method fume desulfurizing system of claim 1 is characterized in that dehydration method is:
A. gypsum cyclone (8) overflowing liquid major part is overflowed from spill box (8.1) top and inserts absorption tower gypsum slurries excavationg pump return duct control valve (5.1) downstream,
B. gypsum cyclone (8) overflowing liquid fraction is led to waste-water vortex device (10) or directly discharge from spill box (8.1) bottom,
C. fresh water (FW) supplementing water (9) is entered filtrate water box (7), make the filtrate water solid content lower, the filtrate of filtrate water box (7) is removed day with fog (4) respectively through filtrate water pump (11) and is washed and be back to absorption tower gypsum slurries excavationg pump (5) return duct control valve (5.1) downstream
D. lime stone pulping process water (1) is inserted lime stone slurry return valve (2.2) downstream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510041492XA CN1331572C (en) | 2005-08-16 | 2005-08-16 | Gypsum pulp dewatering device and method for wetting smoke desulfurizing system |
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| CNB200510041492XA CN1331572C (en) | 2005-08-16 | 2005-08-16 | Gypsum pulp dewatering device and method for wetting smoke desulfurizing system |
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| CN1745881A CN1745881A (en) | 2006-03-15 |
| CN1331572C true CN1331572C (en) | 2007-08-15 |
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| CNB200510041492XA Expired - Fee Related CN1331572C (en) | 2005-08-16 | 2005-08-16 | Gypsum pulp dewatering device and method for wetting smoke desulfurizing system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8105367B2 (en) | 2003-09-29 | 2012-01-31 | Smith & Nephew, Inc. | Bone plate and bone plate assemblies including polyaxial fasteners |
| US8382807B2 (en) | 2005-07-25 | 2013-02-26 | Smith & Nephew, Inc. | Systems and methods for using polyaxial plates |
| US8940028B2 (en) | 2005-07-25 | 2015-01-27 | Smith & Nephew, Inc. | Systems and methods for using polyaxial plates |
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| CN101117204B (en) * | 2007-08-28 | 2010-06-09 | 中国神华能源股份有限公司 | Bottom-flow distributing equipment for serous fluid cyclone station |
| CN101670228B (en) * | 2009-09-25 | 2011-07-27 | 东南大学 | Size pool mixing oxidation device |
| CN102416295A (en) * | 2011-10-19 | 2012-04-18 | 中国神华能源股份有限公司 | Flue gas desulfurization system |
| CA2939524C (en) * | 2014-04-15 | 2018-01-02 | Ihi Corporation | Desulfurization apparatus and exhaust gas processing system using the same |
| CN105180187A (en) * | 2015-07-27 | 2015-12-23 | 航天环境工程有限公司 | Zero-water-consumption zero-wastewater-draining desulfurization system and application |
| CN106563347B (en) * | 2016-11-09 | 2023-07-07 | 航天环境工程有限公司 | Gypsum rotational flow supernatant buffer tank for wet desulfurization system and application |
| CN107261807A (en) * | 2017-07-27 | 2017-10-20 | 大唐环境产业集团股份有限公司 | Desulfurization filtrate recycling system |
| CN107754592A (en) * | 2017-12-07 | 2018-03-06 | 北京兴晟科技有限公司 | A kind of desulfurization slurry Recovery Purifying utilizes system |
| CN108499335A (en) * | 2018-06-08 | 2018-09-07 | 大唐环境产业集团股份有限公司 | A kind of string tower desulphurization system for rinsing demister using recycling filtrate water |
| CN109603552A (en) * | 2018-11-29 | 2019-04-12 | 北京国电龙源环保工程有限公司 | Wet process single column double circulation desulphurization technology gypsum continuously removes system and its removal methods |
| CN109513324A (en) * | 2018-12-21 | 2019-03-26 | 聊城信源集团有限公司 | A kind of water-saving desulfurization total system of flue gas |
| CN110064239A (en) * | 2019-05-08 | 2019-07-30 | 北京国电龙源环保工程有限公司 | A kind of desulfurized gypsum slurries moisture collection system and construction method |
| CN112697322B (en) * | 2020-12-04 | 2022-04-19 | 贵州电网有限责任公司 | Method for testing output of desulfurized gypsum vacuum belt conveyor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1092336A (en) * | 1993-03-08 | 1994-09-21 | 巴布考克及威尔考克斯公司 | Promote flue gas desulfurization usefulness by hydrocyclone |
| CN2813074Y (en) * | 2005-08-16 | 2006-09-06 | 孙克勤 | Gypsum slurry dewatering device in wet-process flue gas desulfurizing system |
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2005
- 2005-08-16 CN CNB200510041492XA patent/CN1331572C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1092336A (en) * | 1993-03-08 | 1994-09-21 | 巴布考克及威尔考克斯公司 | Promote flue gas desulfurization usefulness by hydrocyclone |
| CN2813074Y (en) * | 2005-08-16 | 2006-09-06 | 孙克勤 | Gypsum slurry dewatering device in wet-process flue gas desulfurizing system |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8105367B2 (en) | 2003-09-29 | 2012-01-31 | Smith & Nephew, Inc. | Bone plate and bone plate assemblies including polyaxial fasteners |
| US8992581B2 (en) | 2003-09-29 | 2015-03-31 | Smith & Nephew, Inc. | Bone plate and bone plate assemblies including polyaxial fasteners |
| US8382807B2 (en) | 2005-07-25 | 2013-02-26 | Smith & Nephew, Inc. | Systems and methods for using polyaxial plates |
| US8888824B2 (en) | 2005-07-25 | 2014-11-18 | Smith & Nephew, Inc. | Systems and methods for using polyaxial plates |
| US8940028B2 (en) | 2005-07-25 | 2015-01-27 | Smith & Nephew, Inc. | Systems and methods for using polyaxial plates |
| US10080598B2 (en) | 2005-07-25 | 2018-09-25 | Smith & Nephew, Inc. | Systems and methods for using polyaxial plates |
| US10092337B2 (en) | 2005-07-25 | 2018-10-09 | Smith & Nephew, Inc. | Systems and methods for using polyaxial plates |
| US10292741B2 (en) | 2005-07-25 | 2019-05-21 | Smith & Nephew, Inc. | Systems and methods for using polyaxial plates |
| US10327822B2 (en) | 2005-07-25 | 2019-06-25 | Smith & Nephew, Inc. | Systems and methods for using polyaxial plates |
| US10736680B2 (en) | 2005-07-25 | 2020-08-11 | Smith & Nephew, Inc. | Systems and methods for using polyaxial plates |
| US11896270B2 (en) | 2005-07-25 | 2024-02-13 | Smith & Nephew, Inc. | Systems and methods for using polyaxial plates |
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