CN106215673B - It is a kind of using marble waste pulp as the wet fuel gas desulfurizing technology of absorbent - Google Patents

It is a kind of using marble waste pulp as the wet fuel gas desulfurizing technology of absorbent Download PDF

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Publication number
CN106215673B
CN106215673B CN201610652910.7A CN201610652910A CN106215673B CN 106215673 B CN106215673 B CN 106215673B CN 201610652910 A CN201610652910 A CN 201610652910A CN 106215673 B CN106215673 B CN 106215673B
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waste pulp
marble
absorption tower
marble waste
slurry
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CN106215673A (en
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吕新锋
郭瑞来
廖开太
张毓坤
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China Resources Power Hezhou Co Ltd
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China Resources Power Hezhou Co Ltd
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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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/80—Semi-solid phase processes, i.e. by using slurries
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

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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 discloses a kind of using marble waste pulp as the wet fuel gas desulfurizing technology of absorbent, including marble waste pulp are unloaded, the preparation of marble waste pulp, desulphurization reaction, gypsum dehydration processing and etc..The wet fuel gas desulfurizing technology is capable of the dosage of mixing of strict control marble waste pulp, reduces the polyacrylamide amine content of marble waste pulp, avoids the influence generated to desulphurization reaction process.Meanwhile the wet fuel gas desulfurizing technology recycles marble waste pulp, turns waste into wealth, and reduces the usage amount of lime stone, resources costs are greatly saved.

Description

It is a kind of using marble waste pulp as the wet fuel gas desulfurizing technology of absorbent
Technical field
The present invention relates to flue gas desulphurization technology fields, more particularly to a kind of using marble waste pulp as absorption The wet fuel gas desulfurizing technology of agent.
Background technique
The existing common sulfur removal technology in thermal power plant mainly has wet desulfurization of flue gas by limestone-gypsum method, flue gas recirculation Fluid-bed sweetening, spray drying process desulfurization, the desulfurization of in-furnace calcium spraying tail flue gas humidification activation, sea water desulfuration, electron-beam desulfurization etc.. Currently, wet desulfurization of flue gas by limestone-gypsum method is widely used, the absorbent of desulfurization is lime stone.Pass through pulverizer coal feeder Agstone input mixing tank is mixed with recycle-water and generates agstone slurries, into slurry tank.Lime stone slurry passes through slurry Liquid pump is delivered to smoke absorption tower and carries out desulfurization.The thermal power plant year consumption agstone about 60,000 of every 1,000,000 kilowatts of installed capacitys Ton, higher cost.
Marble waste pulp are the waste pulp that natural marble is generated by production processes such as cutting, saw mills, and with life Production. art process adds polyacrylamide (PAM), is finally collected to sedimentation basin and is handled.It is verified through multiple desulfurization, greatly Fibrous gypsum waste pulp can substitute agstone as the absorbent in sulfur removal technology completely.
The south china industrial area Wang Gao (100,000,000,000 yuan of industry Demonstration Bases of Guangxi calcium carbonate) is the maximum heavy carbon in the whole nation Sour calcium powder body production base, product whole nation occupancy volume reach 35% or more, enjoy the good reputation of " Chinese coarse whiting all ".He Prefecture physics Cutting marble plate enterprise generates marble waste pulp every year can reach 600,000 tons.If marble waste pulp are dealt with improperly, can flow Enter river and cause water pollution, seriously pollutes environment.Therefore marble waste pulp is utilized to replace agstone for thermal power plant Flue gas desulfurization, for marble waste pulp resource comprehensive utilization, solve marble waste pulp emission pollution problem, ensure stone material industry Sustainable development be of great significance, while can also create it is huge ecology and economic benefit.
Currently, about industrialized utilization marble waste pulp as the fume desulfurizing agent in thermal power plant there is not yet related report Road.
Summary of the invention
It is a kind of using marble waste pulp as the wet fuel gas desulfurizing technology of absorbent present invention aims at proposing, with solution The problems such as wasted resources rate of the height of process costs existing for certainly existing desulfurization technology and marble waste pulp is low.
Technical scheme is as follows:
It is a kind of using marble waste pulp as the wet fuel gas desulfurizing technology of absorbent, comprising the following steps:
S1, marble waste pulp are unloaded: marble waste pulp being drained into absorption tower melt pit, absorption tower melt pit inlet adds Equipped with strainer, filtered marble waste pulp are obtained；
Or the chest of strainer is provided at agstone preparation system, marble waste pulp are discharged into the case through filter screen Son, then tuber drainage to the lime stone connected by chest lower openings prepare area's melt pit, obtain filtered marble waste pulp；
S2, marble waste pulp are prepared: the filtered marble waste pulp of step S1 being delivered to limestone slurry by sump pump Process water is added in liquid case B, and being configured to density is 1150-1250kg/m3, concentration be 30%-35% marble slurries；
S3, the prepared marble slurries of step S2 are delivered to absorption tower, desulphurization reaction are carried out with flue gas, in absorption tower Slurry pH value be 5.2-5.6；
S4, it the absorption tower slurries after reaction is delivered to gypsum dehydration system is carried out dehydrating.
Preferably, strainer is 40-120 mesh in the step S1.
Preferably, the chest specification for having strainer in the step S1 is 2200mm × 1000mm × 800mm.
Preferably, have a limestone slurry liquid case A, the lime stone slurry in the slurry tank A be prepared by agstone and At the lime stone slurry density is 1150-1220kg/m3.According to actual condition, lime stone slurry is supplemented to absorption tower It is interior, control the marble concentration of slurry in absorption tower.When marble concentration of slurry reaches established standards, then lime stone is only conveyed Slurries are to absorption tower.Currently, marble waste pulp mix dosage and reach 67.5% in wet fuel gas desulfurizing technology of the present invention.
Preferably, limestone powder bin is had, the powder storehouse material level is 6.5m.
Reinforce the dehydration of gypsum slurries, reduces the concentration of absorption tower slurries to 1120-1160kg/m3.
The beneficial effect comprise that
1, the present invention is real using marble waste pulp as the absorbent in the industrialization flue gas desulfurization technique in thermal power plant The circulation comprehensive of existing marble waste pulp resource utilizes, and solves marble waste pulp emission pollution problem, it is ensured that stone material industry is held Supervention exhibition has huge ecological benefits and economic benefit.
2, the present invention is capable of the dosage of mixing of strict control marble waste pulp, and the polyacrylamide for reducing marble waste pulp contains Amount avoids the influence generated to desulphurization reaction process.
3, the present invention recycles marble waste pulp, turns waste into wealth, and reduces the usage amount of lime stone, greatlys save Resources costs；Be conducive to protect limestone mine resource simultaneously, reduce limestone mine exploitation and vegetation protection.
If marble waste pulp are applied all to heat-engine plant wet flue gas desulfurization, can be greatlyd save for national thermal power plant Resources costs.
By using inventive desulfurization technique, He Prefecture area power plant year, which is reduced, uses 120,000 tons of agstone, enterprise's Spring Festival holidays About 14,400,000 yuan of cost, economic benefit is obvious.
Specific embodiment
Invention is further described in detail With reference to embodiment.It is emphasized that following the description is only It is merely exemplary, the range and its application being not intended to be limiting of the invention.
Embodiment one:
S1, marble waste pulp are unloaded: marble waste pulp being drained into absorption tower melt pit, absorption tower melt pit inlet adds Equipped with strainer, strainer is 40 mesh, obtains filtered marble waste pulp；
S2, marble waste pulp are prepared: the filtered marble waste pulp of step S1 being delivered to limestone slurry by sump pump Process water is added in liquid case B, and being configured to density is 1150kg/m3, concentration be 30% marble slurries；
S3, the prepared marble slurries of step S2 are delivered to absorption tower, desulphurization reaction are carried out with flue gas, in absorption tower Slurry pH value be 5.2；
S4, it the absorption tower slurries after reaction is delivered to gypsum dehydration system is carried out dehydrating.
Limestone slurry liquid case A keeps normal spare, the lime stone slurry in the slurry tank A be prepared by agstone and At the lime stone slurry density is 1150kg/m3.According to actual condition, lime stone slurry is supplemented in absorption tower, is controlled Marble concentration of slurry in absorption tower, marble waste pulp mix dosage and reach 67.5%.
Limestone powder bin is had, the powder storehouse material level is 6.5m.
Reinforce the dehydration of gypsum slurries, reduces the density of absorption tower slurries to 1120kg/m3。
Embodiment two:
S1, marble waste pulp are unloaded: marble waste pulp being drained into absorption tower melt pit, absorption tower melt pit inlet adds Equipped with strainer, strainer is 120 mesh, obtains filtered marble waste pulp；
S2, marble waste pulp are prepared: the filtered marble waste pulp of step S1 being delivered to limestone slurry by sump pump Process water is added in liquid case B, and being configured to density is 1250kg/m3, concentration be 35% marble slurries；
S3, the prepared marble slurries of step S2 are delivered to absorption tower, desulphurization reaction are carried out with flue gas, in absorption tower Slurry pH value be 5.6；
S4, it the absorption tower slurries after reaction is delivered to gypsum dehydration system is carried out dehydrating.
Limestone slurry liquid case A keeps normal spare, the lime stone slurry in the slurry tank A be prepared by agstone and At the lime stone slurry density is 1220kg/m3.According to actual condition, lime stone slurry is supplemented in absorption tower, is controlled Marble concentration of slurry in absorption tower, marble waste pulp mix dosage and reach 67.5%.
Limestone powder bin is had, the powder storehouse material level is 6.5m.
Reinforce the dehydration of gypsum slurries, reduces the density of absorption tower slurries to 1160kg/m3。
Embodiment three:
S1, marble waste pulp are unloaded: be provided with the chest of strainer at agstone preparation system, specification be 2200mm × 1000mm × 800mm, strainer are 80 mesh, and marble waste pulp are discharged into the chest through filter screen, then are connected by chest lower openings The tuber drainage connect to lime stone prepares area's melt pit, obtains filtered marble waste pulp；
S2, marble waste pulp are prepared: the filtered marble waste pulp of step S1 being delivered to limestone slurry by sump pump Process water is added in liquid case B, and being configured to density is 1200kg/m3, concentration be 33% marble slurries；
S3, the prepared marble slurries of step S2 are delivered to absorption tower, desulphurization reaction are carried out with flue gas, in absorption tower Slurry pH value be 5.5；
S4, it the absorption tower slurries after reaction is delivered to gypsum dehydration system is carried out dehydrating.
Limestone slurry liquid case A keeps normal spare, the lime stone slurry in the slurry tank A be prepared by agstone and At the lime stone slurry density is 1180kg/m3.According to actual condition, lime stone slurry is supplemented in absorption tower, is controlled Marble concentration of slurry in absorption tower, marble waste pulp mix dosage and reach 67.5%.
Limestone powder bin is had, the powder storehouse material level is 6.5m.
Reinforce the dehydration of gypsum slurries, reduces the concentration of absorption tower slurries to 1140kg/m3。
The desulfurization effect of each embodiment and the desulfurization effect comparison such as following table of wet desulfurization of flue gas by limestone-gypsum method technique It is shown:
Desulfuration efficiency (%)
Embodiment one 99.4
Embodiment two 99.3
Embodiment three 99.5
Wet desulfurization of flue gas by limestone-gypsum method 95.1
It can be seen from the data in the table that the desulfuration efficiency of inventive desulfurization technique can reach 99% or more, desulfurization effect is obvious.
The above content is combine it is specific/further detailed description of the invention for preferred embodiment, cannot Assert that specific implementation of the invention is only limited to these instructions.General technical staff of the technical field of the invention is come It says, without departing from the inventive concept of the premise, some replacements or modifications can also be made to the embodiment that these have been described, And these substitutions or variant all shall be regarded as belonging to protection scope of the present invention.

Claims (4)

1. a kind of wet fuel gas desulfurizing technology, which is characterized in that the absorbent that the wet fuel gas desulfurizing technology uses is Dali Stone waste pulp, comprising the following steps:
S1, marble waste pulp are unloaded: marble waste pulp being drained into absorption tower melt pit, absorption tower melt pit inlet is equipped with Strainer obtains filtered marble waste pulp；
Or the chest of strainer is provided at agstone preparation system, marble waste pulp are discharged into the chest through filter screen, The tuber drainage connected again by chest lower openings to lime stone prepares area's melt pit, obtains filtered marble waste pulp；
S2, marble waste pulp are prepared: the filtered marble waste pulp of step S1 being delivered to limestone slurry liquid case by sump pump Process water is added in B, and being configured to density is 1150-1250kg/m3, concentration be 30%-35% marble slurries；
S3, the prepared marble slurries of step S2 are delivered to absorption tower, carry out desulphurization reaction with flue gas, the slurry in absorption tower Liquid pH value is 5.2-5.6；Have a limestone slurry liquid case A, the lime stone slurry in the slurry tank A be prepared by agstone and At density 1150-1220kg/m3, the Dali in the absorption tower is controlled by the way that lime stone slurry is supplemented to absorption tower After the concentration of stone slurries reaches established standards, then lime stone slurry is only conveyed to absorption tower；The marble concentration of slurry is set Calibration standard mixes dosage for marble waste pulp and reaches 67.5%；
S4, it the absorption tower slurries after reaction is delivered to gypsum dehydration system is carried out dehydrating, so that the absorption tower slurries Concentration be reduced to 1120-1160kg/m3。
2. a kind of wet fuel gas desulfurizing technology as described in claim 1, which is characterized in that strainer is 40- in the step S1 120 mesh.
3. a kind of wet fuel gas desulfurizing technology as described in claim 1, which is characterized in that there is the case of strainer in the step S1 Cuckoo lattice are 2200mm × 1000mm × 800mm.
4. a kind of wet fuel gas desulfurizing technology as described in claim 1, which is characterized in that have limestone powder bin, the powder Storehouse material position is 6.5m.
CN201610652910.7A 2016-08-10 2016-08-10 It is a kind of using marble waste pulp as the wet fuel gas desulfurizing technology of absorbent Active CN106215673B (en)

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CN109529594A (en) * 2018-11-28 2019-03-29 广西桂能科技发展有限公司 Carbonatation process sugaring waste filter mud mixes the method for being used for flue gas desulphurization with lime stone

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103480250A (en) * 2013-09-25 2014-01-01 福建省建材进出口有限责任公司 Method for preparing desulfurizer for thermal power plant by using waste marble powder
CN103880318A (en) * 2014-04-09 2014-06-25 圣永业（厦门）能源集团股份有限公司 Cement grinding aid activation synergist by using marble powder, granite powder, limestone, desulfurization slag powder and papermaking white clay as composite materials

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103480250A (en) * 2013-09-25 2014-01-01 福建省建材进出口有限责任公司 Method for preparing desulfurizer for thermal power plant by using waste marble powder
CN103880318A (en) * 2014-04-09 2014-06-25 圣永业（厦门）能源集团股份有限公司 Cement grinding aid activation synergist by using marble powder, granite powder, limestone, desulfurization slag powder and papermaking white clay as composite materials

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