CN105582800A - Method for carrying out desulphurization based on waste marble powder processing to treat waste with waste - Google Patents
Method for carrying out desulphurization based on waste marble powder processing to treat waste with waste Download PDFInfo
- Publication number
- CN105582800A CN105582800A CN201510696543.6A CN201510696543A CN105582800A CN 105582800 A CN105582800 A CN 105582800A CN 201510696543 A CN201510696543 A CN 201510696543A CN 105582800 A CN105582800 A CN 105582800A
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- Prior art keywords
- flue gas
- marble powder
- waste
- wastes
- lime
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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
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (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 provides a method for carrying out desulphurization based on waste marble powder processing to treat waste with waste. Flue gas discharged out of an electric precipitator is made to enter a heat exchanger through a booster fan and is cooled at the moment, then the flue gas enters an absorption tower and is mixed with lime slurry formed after waste marble powder is calcined, part of moisture in the slurry is evaporated, the flue gas is further cooled, the flue gas passes through a demister to remove suspended water drops at the top of an absorber, the thin slime slurry is pumped into a nozzle header installed at the tower top from an absorption tower precipitation tank, the thin slime slurry makes contact with the rising flue gas when falling along a spray tower, the flue gas is dissolved in the aqueous solution and neutralized by alkaline matter in the aqueous solution, and thus sulphur in the flue gas is removed. A lot of energy can be saved for power plant desulphurization by utilizing the waste marble powder.
Description
Technical field
The present invention relates to sulfur method, particularly a kind of method based on the discarded marble powder processing desulfurization treatment of wastes with processes of wastes against one another.
Background technology
China is that according to statistics, nineteen ninety-five coal consumption amount is crossed hundred million tons, and is cumulative year after year trend taking fire coal as main country, and the discharge capacity of sulfur dioxide reaches 2,370,000 tons, exceedes the discharge capacity of 2,100,000 tons, the U.S., becomes world's sulfur dioxide (SO2) emissions the first big country. Sulfur dioxide is acid, and its excessive emissions, in atmosphere, can form " acid deposition ", meets water and can form acid rain and acid mist; Do not meet water and can be enriched in plants and soil with the form of " dry deposition " yet, after joining with the water in soil, can form the sulfuric acid that concentration is larger. " acid deposition " causes soil, river acidifying, corroding metal, and infringement land health, destroys vegeto-animal growth, grievous injury ecological environment. The current coal-fired SO2 emissions of China account for the more than 90% of sulfur dioxide (SO2) emissions total amount, and thermal power plant is topmost fume emission source, and the pollution of therefore controlling is imperative.
But thermal power plant in the past carries out desulfurization by agstone, has wasted large quantities of lime stone, does not reach the requirement of saving, the desulfurization that utilizes the marble powder of waste gas to carry out thermal power plant can be saved a large amount of energy.
Summary of the invention
The technical problem to be solved in the present invention is to overcome existing defect, and a kind of method based on the discarded marble powder processing desulfurization treatment of wastes with processes of wastes against one another is provided, and utilizes the marble powder of waste gas can effectively solve the problem in background technology.
In order to solve the problems of the technologies described above, the invention provides following technical scheme:
A kind of method based on the discarded marble powder processing desulfurization treatment of wastes with processes of wastes against one another of the present invention, it is characterized in that, the flue gas ejecting from electric cleaner is entered to heat exchanger by booster fan, now flue gas enters absorption tower and mixes through the lime white liquid phase of calcining formation with the marble powder of waste gas after being cooled, part water evaporates in slurries is fallen, flue gas is further cooling, at the top of absorber, flue gas is removed suspension water droplet through demister, lime thin pulp pumps in the spray header that is arranged on top of tower from the stillpot of absorption tower, contact with the flue gas of rising along lime thin pulp in spray tower dropping process at lime thin pulp, dissolving in the aqueous solution in flue gas, and neutralized by alkaline matter wherein, thereby the sulphur in flue gas is removed.
As a preferred technical solution of the present invention, after flue gas leaves absorption tower, before entering chimney, flue gas through heat exchanger, enters atmosphere by chimney after heating up again.
As a preferred technical solution of the present invention, flue gas is through the washing of circulation lime thin pulp, and more than percent 95 sulphur in flue gas is removed.
As a preferred technical solution of the present invention, by discarded marble powder categorised collection, in heap canopy, classification is stored up and screens, detects, then by screening, detect qualified marble powder and clean, drying, homogenizing afterwards, again marble dust is sent in calciner and calcined, marble powder is CaO and CO2 through calciner calcining and decomposing.
As a preferred technical solution of the present invention, marble powder is in when calcining and collect waste heat the marble dust of also not calcining is carried out to the pre-heat treatment, and the lime generating after decomposing adds water lime and makes slurries and pump into absorption tower as absorbent and fully contact mixing with flue gas after subcooler is cooling.
As a preferred technical solution of the present invention, desulfurization duct is all equipped with by-pass damper, in case of emergency or start time, by-pass damper is opened, so that flue gas is walked around sulfur dioxide removal device, directly enters chimney.
The beneficial effect that compared with prior art the present invention reaches is: the method for this kind based on the discarded marble powder processing desulfurization treatment of wastes with processes of wastes against one another, and utilize the marble powder of waste gas to calcine formation lime, can be a large amount of energy of heat-engine plant desulfurized saving.
Detailed description of the invention
Below in conjunction with the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein, only for description and interpretation the present invention, is not intended to limit the present invention.
Embodiment: the invention provides a kind of method based on the discarded marble powder processing desulfurization treatment of wastes with processes of wastes against one another, it is characterized in that, the flue gas ejecting from electric cleaner is entered to the lime white liquid phase that enters absorption tower heat exchanger flue gas is cooled and form through calcining with the marble powder of waste gas by booster fan to be mixed, part water evaporates in slurries is fallen, flue gas is further cooling, flue gas is through the washing of circulation lime thin pulp, more than percent 95 sulphur in flue gas can be removed, at the top of absorber, flue gas is removed suspension water droplet through demister, after leaving absorption tower, before entering chimney, flue gas is again through heat exchanger, after heating up, enter atmosphere by chimney, absorption tower outlet temperature generally depends primarily on the fuel type of burning, the lowest gas temperature of chimney usually specifies by discharging standards, in China, there is the desulfurization of flue gas heat-exchange unit, the lowest temperature of chimney is generally 80 DEG C, the desulfurization of smokeless heat exchanger, the lowest temperature of chimney is generally 50 DEG C, lime thin pulp pumps in the spray header that is arranged on top of tower from the stillpot of absorption tower, lime thin pulp along in spray tower dropping process it with rise flue gas contact, dissolving in the aqueous solution in flue gas, and neutralized by alkaline matter wherein, thereby the sulphur in flue gas is removed.
Concrete, by discarded marble powder categorised collection, in heap canopy, classification is stored up and screens, detect, then will screen, detecting qualified marble powder cleans, drying afterwards, homogenizing, again marble dust is sent in calciner and calcined, marble powder is CaO and CO2 through calciner calcining and decomposing, in when calcining and collect waste heat the marble dust of also not calcining is carried out to the pre-heat treatment, the lime generating after decomposing adds water lime and makes slurries and pump into absorption tower as absorbent and fully contact mixing with flue gas after subcooler is cooling, the flue gas ejecting from electric cleaner is entered to the lime white liquid phase that enters absorption tower heat exchanger flue gas is cooled and form through calcining with the marble powder of waste gas by booster fan to be mixed, part water evaporates in slurries is fallen, flue gas is further cooling, flue gas is through the washing of circulation lime thin pulp, more than percent 95 sulphur in flue gas can be removed, at the top of absorber, flue gas is removed suspension water droplet through demister, after leaving absorption tower, before entering chimney, flue gas is again through heat exchanger, after heating up, enter atmosphere by chimney, absorption tower outlet temperature generally depends primarily on the fuel type of burning, the lowest gas temperature of chimney usually specifies by discharging standards, in China, there is the desulfurization of flue gas heat-exchange unit, the lowest temperature of chimney is generally 80 DEG C, the desulfurization of smokeless heat exchanger, the lowest temperature of chimney is generally 50 DEG C, most of desulfurization duct is all equipped with by-pass damper, in case of emergency or start time, by-pass damper is opened, so that flue gas is walked around sulfur dioxide removal device, directly enter chimney, lime thin pulp pumps in the spray header that is arranged on top of tower from the stillpot of absorption tower, lime thin pulp along in spray tower dropping process it with rise flue gas contact, dissolving in the aqueous solution in flue gas, and neutralized by alkaline matter wherein, thereby the sulphur in flue gas is removed.
The method of this kind based on the discarded marble powder processing desulfurization treatment of wastes with processes of wastes against one another, utilizes the marble powder of waste gas to calcine formation lime, can be a large amount of energy of heat-engine plant desulfurized saving.
Finally it should be noted that: the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although the present invention is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement. Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. the method based on the discarded marble powder processing desulfurization treatment of wastes with processes of wastes against one another, it is characterized in that, the flue gas ejecting from electric cleaner is entered to heat exchanger by booster fan, now flue gas enters absorption tower and mixes through the lime white liquid phase of calcining formation with the marble powder of waste gas after being cooled, part water evaporates in slurries is fallen, flue gas is further cooling, at the top of absorber, flue gas is removed suspension water droplet through demister, lime thin pulp pumps in the spray header that is arranged on top of tower from the stillpot of absorption tower, contact with the flue gas of rising along lime thin pulp in spray tower dropping process at lime thin pulp, dissolving in the aqueous solution in flue gas, and neutralized by alkaline matter wherein, thereby the sulphur in flue gas is removed.
2. a kind of method based on the discarded marble powder processing desulfurization treatment of wastes with processes of wastes against one another according to claim 1, is characterized in that, after flue gas leaves absorption tower, before entering chimney, flue gas through heat exchanger, enters atmosphere by chimney after heating up again.
3. a kind of method based on the discarded marble powder processing desulfurization treatment of wastes with processes of wastes against one another according to claim 1, is characterized in that, flue gas is through the washing of circulation lime thin pulp, and more than percent 95 sulphur in flue gas is removed.
4. a kind of method based on the discarded marble powder processing desulfurization treatment of wastes with processes of wastes against one another according to claim 1, it is characterized in that, by discarded marble powder categorised collection, in heap canopy, classification is stored up and screens, detects, then by screening, detect qualified marble powder and clean, drying, homogenizing afterwards, then marble dust is sent in calciner and calcined, marble powder is CaO and CO2 through calciner calcining and decomposing.
5. a kind of method based on the discarded marble powder processing desulfurization treatment of wastes with processes of wastes against one another according to claim 4, it is characterized in that, marble powder is in when calcining and collect waste heat the marble dust of also not calcining is carried out to the pre-heat treatment, and the lime generating after decomposing adds water lime and makes slurries and pump into absorption tower as absorbent and fully contact mixing with flue gas after subcooler is cooling.
6. a kind of method based on the discarded marble powder processing desulfurization treatment of wastes with processes of wastes against one another according to claim 1, is characterized in that, desulfurization duct is all equipped with by-pass damper, in case of emergency or start time, by-pass damper is opened, so that flue gas is walked around sulfur dioxide removal device, directly enters chimney.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510696543.6A CN105582800A (en) | 2015-10-26 | 2015-10-26 | Method for carrying out desulphurization based on waste marble powder processing to treat waste with waste |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510696543.6A CN105582800A (en) | 2015-10-26 | 2015-10-26 | Method for carrying out desulphurization based on waste marble powder processing to treat waste with waste |
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| CN105582800A true CN105582800A (en) | 2016-05-18 |
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| CN201510696543.6A Pending CN105582800A (en) | 2015-10-26 | 2015-10-26 | Method for carrying out desulphurization based on waste marble powder processing to treat waste with waste |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107185384A (en) * | 2017-06-27 | 2017-09-22 | 福建省福能新型建材有限责任公司 | The method that dry powder-shaped fume desulfurizing agent is produced using discarded marble |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032493A (en) * | 1987-09-16 | 1989-04-26 | 千代田化工建设株式会社 | Handle the wet desulfurizing process of waste gas |
| US5486342A (en) * | 1994-06-13 | 1996-01-23 | Electric Power Research Institute | Clear liquor scrubbing of sulfur dioxide with forced oxidation in flue gas desulfurization system |
| US5693301A (en) * | 1994-03-31 | 1997-12-02 | Abb Flakt Ab | Method for removing sulphur dioxide from a gas |
| CN1281747A (en) * | 1999-07-27 | 2001-01-31 | 陈然振 | Flue gas desulfurization technology and equipment by using lime/gypsum method |
| CN2784762Y (en) * | 2005-02-03 | 2006-05-31 | 哈尔滨工大格瑞环保能源科技有限公司 | Flue-gas desulfurization device for thermal power plant |
| CN103553372A (en) * | 2013-10-29 | 2014-02-05 | 福建省建材进出口有限责任公司 | Method for producing lime by using waste Nan'an marble powder |
-
2015
- 2015-10-26 CN CN201510696543.6A patent/CN105582800A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032493A (en) * | 1987-09-16 | 1989-04-26 | 千代田化工建设株式会社 | Handle the wet desulfurizing process of waste gas |
| US5693301A (en) * | 1994-03-31 | 1997-12-02 | Abb Flakt Ab | Method for removing sulphur dioxide from a gas |
| US5486342A (en) * | 1994-06-13 | 1996-01-23 | Electric Power Research Institute | Clear liquor scrubbing of sulfur dioxide with forced oxidation in flue gas desulfurization system |
| CN1281747A (en) * | 1999-07-27 | 2001-01-31 | 陈然振 | Flue gas desulfurization technology and equipment by using lime/gypsum method |
| CN2784762Y (en) * | 2005-02-03 | 2006-05-31 | 哈尔滨工大格瑞环保能源科技有限公司 | Flue-gas desulfurization device for thermal power plant |
| CN103553372A (en) * | 2013-10-29 | 2014-02-05 | 福建省建材进出口有限责任公司 | Method for producing lime by using waste Nan'an marble powder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107185384A (en) * | 2017-06-27 | 2017-09-22 | 福建省福能新型建材有限责任公司 | The method that dry powder-shaped fume desulfurizing agent is produced using discarded marble |
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Application publication date: 20160518 |