CN105289245A - Boiler exhaust smoke and seawater filler washing desulfurization method and washing device - Google Patents

Boiler exhaust smoke and seawater filler washing desulfurization method and washing device Download PDF

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Publication number
CN105289245A
CN105289245A CN201510669328.7A CN201510669328A CN105289245A CN 105289245 A CN105289245 A CN 105289245A CN 201510669328 A CN201510669328 A CN 201510669328A CN 105289245 A CN105289245 A CN 105289245A
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Prior art keywords
washing
seawater
packing layer
filler
smoke
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CN201510669328.7A
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Chinese (zh)
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彭斯干
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Priority to CN201510669328.7A priority Critical patent/CN105289245A/en
Priority to PCT/CN2015/100083 priority patent/WO2017067087A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention relates to a boiler exhaust smoke seawater filler washing desulfurization method and a washing device. The method includes the steps that boiler smoke and seawater are guided into the washing device, the smoke is washed in the washing device through the seawater, the washed purified smoke and the washing seawater are discharged out of the washing device, and discharged acidic seawater is discharged to a sea after passing a seawater quality restoration device; the smoke is washed in the washing device through the seawater, in other words, filler washing is performed in a filler washing device through filler layers, and the filler washing device comprises a plurality of filler layers with the filler factors being 20-1000. The method and the washing device have the advantages that the boiler smoke with the smoke temperature being 100-190 DEG C is directly processed, emission of 99% sulfur dioxide in the smoke is reduced so that pollution can be reduced, no chemical additives or harmful by-products exist, a smoke cooling/re-heating system is not needed, the manufacturing and running cost of an emission reduction facility is comprehensively reduced, reliability is substantially improved, and the running rate is substantially increased.

Description

Boiler exhaust gas seawater padding washing sulfur method and wash mill
Technical field
The present invention relates to boiler exhaust gas seawater padding washing sulfur method and wash mill, use the atmosphere pollution based on sulfur dioxide in seawer washing reduction of discharging boiler smoke, belong to the clean energy technology field of coal fired power plant flue gas desulfurization.
Background technology
Over nearly 20 years, along with becoming increasingly conspicuous of global environment resource problem, demand for seawer washing sulfur removal technology rises year by year, this is because seawer washing technique can the Ultra Low Cost efficient emission-reducing industrial burning device particularly atmosphere pollution of coal-burning power plant based on sulfur dioxide, and friendly to the marine eco-environment.Described only uses seawer washing sulfur removal technology, also referred to as " desulfuration of flue gas by sea water technology ", " NSWFGD ", is even called for short " sea water desulfuration " etc., and its key feature uses seawer washing industrial smoke.Described seawater, comprises the natural sea-water from ocean extracting directly, also comprises and to extract for purposes such as industrial plants coolings from ocean but to still have the seawater of certain basicity.
But in prior art as shown in Figure 4, although use seawater as washing desulphurization medium, but edge is in order to the traditional desulfurization process of alkalization work raw material as washing desulphurization medium, and the spray column adopting traditional sulfur removal technology special is used as seawer washing unit, even the same with traditional sulfur removal technology, aeration operation is set in washing unit inside, thus causes following problem:
1) sulfur dioxide absorption poor effect, pollution emission reduction does not reach requirement, loses the environment-friendly advantage that seawer washing process efficient reduces discharging;
2) increase seawater spraying density for improving assimilation effect, and increase gas approach pressure to offset the resistance increasing sprinkle density and cause; And directly can not process cigarette temperature higher than the boiler smoke of 100 DEG C due to conventional washing unit, also separately establish cooling/reheat machine with cooled flue gas in advance, result causes operation energy consumption and maintenance cost to raise, and loses the low cost economic advantages of seawer washing technology;
Also have similar prior art, still do not deal with problems owing to increasing sprinkle density, have to add alkaline industrial chemicals in seawer washing system, so that lose the advantage to marine eco-environment close friend, its use is restricted.
And separately have the patent No. to be the Chinese patent of ZL95119389.9, disclose the technical scheme of boiler smoke only being carried out to padding washing desulfurization with seawater, but due to comparatively preliminary, people are to the lifting of such technical scheme and optimize to produce and expect further.
Summary of the invention
The object of the invention is, overcome the deficiencies in the prior art, a kind of boiler exhaust gas is provided to use seawer washing sulfur method and wash mill, by the improvement to the multinomial technical parameter of padding washing device, lifting, further optimization padding washing desulfur technology scheme, realize only using seawer washing, high efficiency, low cost reduces discharging the atmosphere pollution based on sulfur dioxide in boiler smoke, gives full play to seawer washing technique emission reduction effect is good, cost is low environment and economic advantages.
Boiler exhaust gas seawater padding washing sulfur method technical scheme of the present invention comprises the steps:
A kind of boiler exhaust gas seawater padding washing sulfur method, it comprises and imports boiler smoke and seawater to wash mill, in wash mill with seawer washing flue gas, the acid seawater of the purifying smoke after washing and washing seawater discharge wash mill, discharge transported to seawater quality recovery device be finally discharged into sea; Described be by padding washing that packing layer carries out in padding washing device with seawer washing flue gas in wash mill, described padding washing device comprises the packing layer that the filler stem factor is 20 ~ 1000/m, and flue gas is 0.5 ~ 10 second by the wash time of packing layer; The described padding washing undertaken by packing layer, be the washing that the boiler smoke of 100 DEG C to 190 DEG C directly imports packing layer and carries out by temperature, described padding washing is the washing carried out under the condition completely cutting off outside atmosphere with water seal.
Further technical scheme is:
Described seawer washing sulfur method, its packing layer arranges heatproof section at flue gas upstream end, and the height of this heatproof section is greater than 5 ‰ of packing layer total height, heatproof section filler and structural material tolerable temperature >=100 DEG C.
Described seawer washing sulfur method, it imports the seawater of padding washing device, and flow is choose in the scope of 30 ~ 1000 at the ratio of boiler fuel flow and seawater flow, and wherein the unit of boiler fuel flow is Nm 3/ h, seawater flow unit is m 3/ h.
Described seawer washing sulfur method, its padding washing is that flue gas is less than the high efficiency low pressure drop washing of 1500Pa by the Pressure Drop of packing layer.
The seawater washer technical scheme of boiler exhaust gas seawater padding washing sulfur method of the present invention is: it comprises housing, the packing layer that the filler stem factor is 20 ~ 1000/m is provided with in this housing, packing layer lower end is provided with heatproof section, this heatproof section by the filler of tolerable temperature >=100 DEG C or/and structural member forms, heatproof section is highly greater than 5 ‰ of packing layer total height, and heatproof section material is selected from metal, pottery and plastics.
Further technical scheme is: described seawater washer, and the total height of its packing layer is the time of boiler smoke by packing layer and the product of filler flood point, and the described time is 0.5 ~ 10 second.。
The obvious technical effects of boiler exhaust gas seawater padding washing sulfur method of the present invention and wash mill:
Obvious technical effects of the present invention, directly can process the boiler smoke of cigarette temperature 100 DEG C to 190 DEG C, reduce by the sulfur dioxide (SO2) emissions of in flue gas 99%, omit cooling/reheat system simultaneously, there is no chemical addition agent and harmful side product, system cost and operating cost are reduced comprehensively, and the reliability and the operation ratio that reduce discharging facility then significantly improve.
Accompanying drawing explanation
Fig. 1 is that the present invention discharges fume the process flow diagram of seawater padding washing method.
Fig. 2 is that the present invention discharges fume an embodiment schematic diagram of seawater padding washing device.
Fig. 3 a is a kind of flat-ring packing schematic diagram, and the packing factor that this filler piles packing layer is 80 ~ 800;
Fig. 3 b is a kind of ladder ring packing schematic diagram, and the packing factor that this filler piles packing layer is 50 ~ 300.
Fig. 4 is a kind of schematic diagram of existing seawer washing technical scheme, comprising: washing seawater lift pump and pipeline, flue gas pre-cooled/reheat machine (GGH), the spray column of traditional handicraft, traditional handicraft tower in aeration facility etc.
The name of the associated components that the figure labelled notation shown in accompanying drawing is corresponding or structure is called:
1-housing, 2-flue gas introducing port, 3-washing seawater inlet, 4-purifying smoke outlet, 5-acid seawater outlet, 6-demister, 7-water-locator, 8-packing layer, 9-packing layer heatproof section, 10-water seal tank, 11-boiler, 12-deduster, 13-air-introduced machine, 14-seawater lift pump, 15-chimney, 16-quality recovery device.
Detailed description of the invention
Be described further as follows to boiler exhaust gas seawater padding washing method of the present invention and wash mill in conjunction with the accompanying drawings and embodiments:
Embodiment 1: the basic embodiment being boiler exhaust gas seawater padding washing sulfur method of the present invention, its step imports boiler smoke and seawater to wash mill, in wash mill with seawer washing flue gas, the acid seawater of the purifying smoke after washing and washing seawater discharge wash mill, discharge transported to seawater quality recovery device be finally discharged into sea; Described be by padding washing that packing layer carries out in padding washing device with seawer washing flue gas in wash mill, described padding washing device comprises the packing layer that the filler stem factor is 20 ~ 1000/m, and flue gas is 0.5 ~ 10 second by the wash time of packing layer; The described filler stem factor is a/ ε 3, wherein a is total specific area of packing layer, and unit is m 2/ m 3, ε is the ratio of packing layer voidage and packing layer volume, and unit is m 3/ m 3; The described padding washing undertaken by packing layer, be the washing that the boiler smoke of 100 DEG C to 190 DEG C directly imports packing layer and carries out by temperature, described padding washing is the washing carried out under the condition completely cutting off outside atmosphere with water seal.Because filler stem Summing Factor wash time affects padding washing effect, the present invention proposes the parameter being suitable for filler stem Summing Factor wash time.
Prior art representated by accompanying drawing 4 and the main distinction of technical solution of the present invention are: the traditional sulfur removal technology 1, relying on alkaline industrial chemicals, for avoiding fouling and clogging, its personal cleansing tower must adopt the hollow-core construction that voidage is very big, gas-liquid contact face is very little; The dissolution mechanism of seawer washing then requires very large gas liquid interfacial area, if prior art is the same adopts hollow spray column with accompanying drawing 4 etc., mass transfer intensity must be caused not enough, and sulfur dioxide assimilation effect is not good; And take into full account the technical solution of the present invention that seawer washing process mechanism proposes, achieve the technique effect of Ultra Low Cost high efficiency sulfur dioxide absorption; 2, traditional handicraft is used for seawer washing in the technical scheme of the inner aeration of wash mill by the prior art such as accompanying drawing 4, the sulfur dioxide product generation back reaction that washing seawater will be made to be dissolved down, the sulfur dioxide just absorbed is driven out of again by result, makes assimilation effect deteriorated further.And padding washing of the present invention, be then the washing carried out under the condition completely cutting off outside atmosphere with water seal, therefore ensure that the high-selenium corn efficiency of sulfur dioxide; 3, the traditional handicraft washing unit that adopts of the prior art such as accompanying drawing 4, directly can not process cigarette temperature higher than the boiler smoke of 100 DEG C, and must separately establish cooling/reheat machine with cooled flue gas in advance, result causes manufacture and operating cost rising; Temperature can be that the boiler smoke of 100 DEG C to 190 DEG C directly imports packing layer and washs by wash mill of the present invention, therefore manufacture and operating cost low, there are higher economic advantages.
Embodiment 2: be the further embodiment on embodiment 1 basis.Described washing desulphurization method, its packing layer, arranges heatproof section at flue gas upstream end, and the height of this heatproof section is greater than 5 ‰ of packing layer total height, heatproof section filler and structural material tolerable temperature >=100 DEG C.The seawater of described importing padding washing device, its flow is choose in the scope of 30 ~ 1000 at the ratio of boiler fuel flow and seawater flow, and wherein the unit of boiler fuel flow is Nm 3/ h, seawater flow unit is m 3/ h.Described padding washing carries out under the condition completely cutting off outside atmosphere with water seal, and flue gas is less than 1500Pa by the Pressure Drop of packing layer.
Embodiment 3: be the preferred embodiment on embodiment 2 basis.Described washing desulphurization method, importing boiler smoke to wash mill is be the packing layer that the flue gas of 130 DEG C directly imports wash mill by cigarette temperature, and the flow of importing boiler smoke is 2800000Nm 3/ h, the ratio of flue gas flow and seawater flow is chosen for 200; Make flue gas and seawater in padding washing device in a counter-current configuration by packing layer 8; The packing factor of packing layer 8 is 30 ~ 900/m, is highly 5m, and the height of heatproof section 9 is 40cm, is made up of the polytetrafluoroethylene (PTFE) Pall ring of tolerable temperature 160 DEG C; Flue gas is 2 seconds by the time of packing layer 8.When packing factor is 40 ~ 800/m, or during 50 ~ 600/m, then it is two other different embodiment.
Embodiment 4: the basic embodiment being the seawater washer of boiler exhaust gas seawater padding washing sulfur method of the present invention, as shown in accompanying drawing 2,3a, 3b, it comprises housing 1, the packing layer 8 that the filler stem factor is 20 ~ 1000 is provided with in this housing, packing layer 8 lower end is provided with heatproof section 9, this heatproof section is by the filler of tolerable temperature >=100 DEG C or/and structural member forms, and heatproof section is highly greater than 5 ‰ of packing layer total height, and heatproof section material is selected from metal, pottery and plastics.The total height of packing layer 8 is the time of boiler smoke by packing layer and the product of filler flood point, and the described time is 0.5 ~ 10 second.Embodiment is in addition: the embodiment applying a kind of flat-ring packing as shown in Figure 3 a, and the packing factor that this filler piles packing layer is 80 ~ 800/m; Apply the embodiment of a kind of ladder ring packing as shown in Figure 3 b, the packing factor that this filler piles packing layer is 50 ~ 300/m.
Embodiment 5: be the preferred embodiment on embodiment 4 basis.As shown in Figure 1 and Figure 2, described seawater washer, the non-heatproof section filler of packing layer 8, the ladder ring packing being 300 by a kind of packing factor selected in Chemical Engineering Design handbook is piled up and is formed, and heatproof section is piled by MPS Raschig ring; Wash mill common segment design of the present invention, carries out with reference to Chemical Engineering Design handbook regarding filler Deethanizer design part.
Claims of the present invention is not limited to above-described embodiment.

Claims (6)

1. a boiler exhaust gas seawater padding washing sulfur method, it comprises and imports boiler smoke and seawater to wash mill, in wash mill with seawer washing flue gas, the acid seawater of the purifying smoke after washing and washing seawater discharge wash mill, discharge transported to seawater quality recovery device be finally discharged into sea; It is characterized in that, described be by padding washing that packing layer carries out in padding washing device with seawer washing flue gas in wash mill, described padding washing device comprises the packing layer that the filler stem factor is 20 ~ 1000/m, and flue gas is 0.5 ~ 10 second by the wash time of packing layer; The described padding washing undertaken by packing layer, be the washing that the boiler smoke of 100 DEG C to 190 DEG C directly imports packing layer and carries out by temperature, described padding washing is the washing carried out under the condition completely cutting off outside atmosphere with water seal.
2. seawer washing sulfur method according to claim 1, is characterized in that, described packing layer arranges heatproof section at flue gas upstream end, and the height of this heatproof section is greater than 5 ‰ of packing layer total height, heatproof section filler and structural material tolerable temperature >=100 DEG C.
3. seawer washing sulfur method according to claim 1, it is characterized in that, the seawater of described importing padding washing device, its flow is choose in the scope of 30 ~ 1000 at the ratio of boiler fuel flow and seawater flow, and wherein the unit of boiler fuel flow is Nm 3/ h, seawater flow unit is m 3/ h.
4. seawer washing sulfur method according to claim 1, is characterized in that, described padding washing, is that flue gas is less than the high efficiency low pressure drop washing of 1500Pa by the Pressure Drop of packing layer.
5. for the seawater washer of boiler exhaust gas seawater padding washing sulfur method described in claim 1, it is characterized in that, it comprises housing (1), the packing layer (8) that the filler stem factor is 20 ~ 1000/m is provided with in this housing, packing layer (8) lower end is provided with heatproof section (9), this heatproof section is by the filler of tolerable temperature >=100 DEG C or/and structural member forms, and heatproof section is highly greater than 5 ‰ of packing layer total height, and heatproof section material is selected from metal, pottery and plastics.
6. seawater washer according to claim 5, is characterized in that, the total height of packing layer (8) is the time of boiler smoke by packing layer and the product of filler flood point, and the described time is 0.5 ~ 10 second.
CN201510669328.7A 2015-10-18 2015-10-18 Boiler exhaust smoke and seawater filler washing desulfurization method and washing device Pending CN105289245A (en)

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CN201510669328.7A CN105289245A (en) 2015-10-18 2015-10-18 Boiler exhaust smoke and seawater filler washing desulfurization method and washing device
PCT/CN2015/100083 WO2017067087A1 (en) 2015-10-18 2015-12-31 Method of venting smoke and cleaning and desulfurizing furnace using sea water and filler and cleaning device utilizing same

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CN201510669328.7A CN105289245A (en) 2015-10-18 2015-10-18 Boiler exhaust smoke and seawater filler washing desulfurization method and washing device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017067088A1 (en) * 2015-10-18 2017-04-27 彭斯干 Method of cleaning and purifying exhaust gas output from ocean engineering power device by only using sea water and device utilizing same
CN109775791A (en) * 2019-03-20 2019-05-21 上海发电设备成套设计研究院有限责任公司 A kind of the desulfurization wastewater concentration reducing device and processing method of automatic desludging

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115634522A (en) * 2022-10-20 2023-01-24 云南曲靖钢铁集团呈钢钢铁有限公司 Environment-friendly energy-saving type deep purification system and method for flue gas of belt type sintering machine

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US6759019B1 (en) * 1999-11-02 2004-07-06 Fujikasui Engineering Co., Ltd. Process for desulfurization of exhaust gas with seawater
CN101314106A (en) * 2008-06-13 2008-12-03 彭斯干 Method and apparatus for desulfurizing exhaust gas of seagoing vessel
CN102211045A (en) * 2010-04-01 2011-10-12 上海霍林化工设备工程有限公司 Catalyst stuffing and stuffing bed for seawater desulfurization process
WO2013004048A1 (en) * 2011-07-01 2013-01-10 Peng Sigan Method, apparatus, and system used for purifying and silencing exhaust of internal combustion engine
CN102112207B (en) * 2008-06-13 2013-06-19 武汉晶源环境工程有限公司 Washing device and washing method for marine exhaust flue gases

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Publication number Priority date Publication date Assignee Title
CN2346494Y (en) * 1998-05-22 1999-11-03 武汉晶源环境工程有限公司 Smoke, SO2 absorbing appts, by seawater process
US6759019B1 (en) * 1999-11-02 2004-07-06 Fujikasui Engineering Co., Ltd. Process for desulfurization of exhaust gas with seawater
CN101314106A (en) * 2008-06-13 2008-12-03 彭斯干 Method and apparatus for desulfurizing exhaust gas of seagoing vessel
CN102112207B (en) * 2008-06-13 2013-06-19 武汉晶源环境工程有限公司 Washing device and washing method for marine exhaust flue gases
CN102211045A (en) * 2010-04-01 2011-10-12 上海霍林化工设备工程有限公司 Catalyst stuffing and stuffing bed for seawater desulfurization process
WO2013004048A1 (en) * 2011-07-01 2013-01-10 Peng Sigan Method, apparatus, and system used for purifying and silencing exhaust of internal combustion engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017067088A1 (en) * 2015-10-18 2017-04-27 彭斯干 Method of cleaning and purifying exhaust gas output from ocean engineering power device by only using sea water and device utilizing same
CN109069993A (en) * 2015-10-18 2018-12-21 彭斯干 Ocean engineering power tail gas only uses seawer washing purification method and device
CN109775791A (en) * 2019-03-20 2019-05-21 上海发电设备成套设计研究院有限责任公司 A kind of the desulfurization wastewater concentration reducing device and processing method of automatic desludging

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Application publication date: 20160203