CN106139877A - Efficient small coal-firing units gas desulfurization device - Google Patents
Efficient small coal-firing units gas desulfurization device Download PDFInfo
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- CN106139877A CN106139877A CN201610755150.2A CN201610755150A CN106139877A CN 106139877 A CN106139877 A CN 106139877A CN 201610755150 A CN201610755150 A CN 201610755150A CN 106139877 A CN106139877 A CN 106139877A
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- Prior art keywords
- connects
- desulfurizing tower
- serum recycle
- pond
- desulfuration
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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
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/606—Carbonates
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- 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)
- 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 discloses a kind of efficient small coal-firing units gas desulfurization device；Described desulfurizer include desulfurizing tower, be positioned at desulfurizing tower outer and with the serum recycle pond connected bottom desulfurizing tower, lime stone slurry circulated sprinkling system, pre-desulfurization spray system and limestone slurry liquid preparing system；Described lime stone slurry circulated sprinkling system includes circulating pump and is positioned at the spraying layer of desulfurizing tower, the entrance of described circulating pump connects with serum recycle pond, outlet connects with spraying layer, described pre-desulfurization spray system includes pre-desulfuration recycle pump and is positioned at the pre-desulfuration spraying tube of desulfurizing tower smoke inlet flue, the entrance of described pre-desulfuration recycle pump connects with serum recycle pond, outlet connects with pre-desulfuration spraying tube, and the lime stone slurry outlet of described limestone slurry liquid preparing system connects with serum recycle pond.The system of the present invention arranges notable simplification, is suitable for the flue gas desulfurization of miniature coal unit, improves the desulfuration efficiency of desulfurizer simultaneously.
Description
Technical field
The invention belongs to flue gases purification field, relate to a kind of efficient small coal-firing units gas desulfurization device.
Background technology
Coal fired power generation is one of main path of coal utilization, and fossil-fired unit need to discharge a large amount of pollutant, wherein SO2
And dust is more serious to the harm of environment, is also the major pollutants needing priority control.It is then desired at coal fired power generation
Fume emission at desulphurization system is set.Flue gas desulfurization technique includes wet desulphurization and dry desulfurization etc., wherein wet desulphurization skill
The utilization of art is the most extensive.The principle of wet process of FGD desulfurizing tower is to utilize limestone alkaline slurry to spray from the top down, cigarette
Gas flows from bottom to top, and lime stone slurry drops in the SO in dropping process in desulfurization fume2, generate the side-products such as Gypsum Fibrosum, reach
SO in removing flue gas2Purpose.
Traditional limestone/gypsum method flue gas desulfurization device, equipment investment and operating cost are big, and floor space is big, technique
Complexity, operation and maintenance difficulty, on small unit, it is difficult to popularization and application on a large scale.But current domestic non-electrical industry exists
Substantial amounts of small-sized power plant for self-supply, and there is no desulfurization.The flue gas that this part power plant is arranged causes certain pollution to air, for
This, the practical sulfur removal technology technology and equipment of exploitation miniature coal unit, iterative method industry also forms large-scale production ability, is
Promote air contaminant treatment work in the urgent need to, be also currently be eager solve problem.
Further, since China's sulfur content in coal is higher, and between Coal rank sulfur content, gap is the biggest, often designs coal
Plant sulfur content and be less than actually used coal sulfur content, which results in substantial amounts of desulfuration absorbing tower actual motion sulfur content more than setting
Meter sulfur content, desulfurizer desulfuration efficiency does not reaches design requirement.Accordingly, it would be desirable to improve the desulfuration efficiency of desulfurizer, meet
Actual motion demand.
Summary of the invention
In view of this, it is an object of the invention to provide a kind of efficient small coal-firing units gas desulfurization device, system sets
Putting notable simplification, floor space is little, and manufacture, installation and operation low cost are suitable for the flue gas desulfurization of miniature coal unit, carry simultaneously
The desulfuration efficiency of high desulfurizer.
For reaching above-mentioned purpose, the present invention provides following technical scheme:
The invention discloses a kind of efficient small coal-firing units gas desulfurization device, described desulfurizer include desulfurizing tower,
It is positioned at outside desulfurizing tower and sprays with the serum recycle pond connected bottom desulfurizing tower, lime stone slurry circulated sprinkling system, pre-desulfurization
System and limestone slurry liquid preparing system；Described lime stone slurry circulated sprinkling system includes circulating pump and is positioned at desulfurizing tower
Spraying layer, the entrance of described circulating pump connects with serum recycle pond, and outlet connects with spraying layer, described pre-desulfurization spray system bag
Include pre-desulfuration recycle pump and be positioned at the pre-desulfuration spraying tube of desulfurizing tower smoke inlet flue, the entrance of described pre-desulfuration recycle pump
Connecting with serum recycle pond, outlet connects with pre-desulfuration spraying tube, and the lime stone slurry of described limestone slurry liquid preparing system goes out
Mouth connects with serum recycle pond.
Further, described limestone slurry liquid preparing system includes being positioned at top, serum recycle pond and being sequentially communicated from top to bottom
Limestone powder bin, screw(-type) feeder and ash water mixer, described ash water mixer lime stone slurry outlet and serum recycle
Pond connects.
Further, it is provided with agitator in described serum recycle pond.
Further, the bottom in described serum recycle pond is provided with oxidation air device, and the form of described oxidation air device is
Grating type.
Further, described desulfurizer also includes that slurry pump and gypsum dehydration system, described gypsum dehydration system include rotation
Stream device and the vacuum belt dewaterer being connected with cyclone, the entrance of described slurry pump connects with serum recycle pond, exports and revolves
Stream device connection, the overflow box outlet of described cyclone and the filtrate (liquid of vacuum belt dewaterer are respectively with serum recycle pond even
Logical.
Further, the spray direction of described pre-desulfuration spraying tube is relative with flue gas flow direction.
The beneficial effects of the present invention is:
1) desulfurization tower slurry pool of conventional smoke desulfurization device, lime stone slurry case and accident slurry tank are merged by the present invention
Being a serum recycle pond, lime stone slurry prepared by limestone slurry liquid preparing system is not stored in lime stone slurry case, and
It is to flow directly in serum recycle pond, does not deposit lime stone slurry in desulfurizing tower, but deposit in serum recycle pond, great Liang Shang
State equipment and parts, all can all save and realize the notable simplification of desulfurizer, so that whole device is simple, floor space
Little, manufacture and installation cost is relatively low, operating procedure is relatively simple, and operating cost is low, is suitable for the flue gas desulfurization of miniature coal unit,
Can effectively promote desulfurizer installation application on small unit；
2) present invention is sprayed by pre-desulfurization in the smoke inlet flue of desulfurizing tower, make flue gas enter desulfurizing tower it
Before just carry out the most pre-desulfurization, thus can improve the desulfuration efficiency of desulfurizer, solve the desulfurization caused because of actual coal
The problem that efficiency is on the low side.
Accompanying drawing explanation
In order to make the purpose of the present invention, technical scheme and beneficial effect clearer, the present invention provides drawings described below to carry out
Illustrate:
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
Fig. 1 is the structural representation of the present invention, as it can be seen, the efficient small coal-firing units gas desulfurization device of the present invention
Including desulfurizing tower 1, be positioned at desulfurizing tower 1 outer and with the serum recycle pond 2 connected bottom desulfurizing tower 1, lime stone slurry circulated sprinkling
System, pre-desulfurization spray system and limestone slurry liquid preparing system；Described lime stone slurry circulated sprinkling system includes circulating pump 3
Be positioned at the spraying layer 4 of desulfurizing tower 1, the entrance of described circulating pump 3 connects with serum recycle pond 2, and outlet is with spraying layer 4 even
Logical, described pre-desulfurization spray system includes pre-desulfuration recycle pump 5 and is positioned at the pre-desulfurization spray of desulfurizing tower 1 smoke inlet flue
Pipe 6, the entrance of described pre-desulfuration recycle pump 5 connects with serum recycle pond 2, and outlet connects with pre-desulfuration spraying tube 6, described Calx
The lime stone slurry outlet of stone serum producing system connects with serum recycle pond 2.
Lime stone slurry prepared by limestone slurry liquid preparing system is passed directly in serum recycle pond 2, is followed by pre-desulfurization
Described lime stone slurry is extracted into pre-desulfuration spraying tube 6 and by circulating pump 3, described lime stone slurry is extracted into spray by ring pump 5
Layer 4, through nozzles spray lime stone slurry, carries out two with flue gas in desulfurizing tower 1 smoke inlet flue and desulfurizing tower 1 and contacts
Reaction, after reaction, flue gas is discharged from tower top through spraying layer 4, and lime stone slurry follows through flowing directly into serosity at the bottom of desulfurizing tower 1 tower
In cisterna ambiens 2, inject the lime stone slurry that part lime stone slurry preparation system is newly prepared, keep serosity PH to be circulated in 5～6
Utilize.
In the present embodiment, described limestone slurry liquid preparing system includes being positioned at top, serum recycle pond 2 and depending on from top to bottom
The limestone powder bin 7 of secondary connection, screw(-type) feeder 8 and ash water mixer 9, the lime stone slurry outlet of described ash water mixer 9
Connect with serum recycle pond 2；Agstone fully mixes with industry water through screw(-type) feeder 8 laggard ash charge water mixer 9
After conjunction, flow directly in serum recycle pond 2 after being configured to the serosity of finite concentration (20%～30%).
In the present embodiment, in described serum recycle pond 2, it is provided with agitator 10；Agitator 10 mainly prevents lime stone slurry
Deposit.
In the present embodiment, the bottom in described serum recycle pond 2 is provided with oxidation air device 11, described oxidation air device 11
Form be grating type；To meet, serosity sulfite calcium is oxidized to calcium sulfate, obtains gypsum by-product.
In the present embodiment, described desulfurizer also includes slurry pump 12 and gypsum dehydration system, described gypsum dehydration system
Including cyclone 13 and the vacuum belt dewaterer 14 that is connected with cyclone 13, the entrance of described slurry pump 12 and serum recycle pond
2 connections, outlet connects with cyclone 13, the overflow box outlet of described cyclone 13 and the filtrate (liquid of vacuum belt dewaterer 14
Connect with serum recycle pond 2 respectively；Gypsum slurries slurry pump 12 in serum recycle pond 2 is delivered to gypsum dehydration system and is taken off
Water processes, and overflowing liquid and filtrate that dehydration produces flow directly in serum recycle pond 2, also eliminate and arrange filtrate box.
In the present embodiment, the spray direction of described pre-desulfuration spraying tube 6 is relative with flue gas flow direction；Make flue gas and spray liquid shape
Become convection current, improve spray-absorption effect.
Finally illustrate, preferred embodiment above only in order to technical scheme to be described and unrestricted, although logical
Cross above preferred embodiment the present invention to be described in detail, it is to be understood by those skilled in the art that can be
In form and it is made various change, without departing from claims of the present invention limited range in details.
Claims (6)
1. an efficient small coal-firing units gas desulfurization device, it is characterised in that: described desulfurizer includes desulfurizing tower, is positioned at
Desulfurizing tower outer and with the serum recycle pond connected bottom desulfurizing tower, lime stone slurry circulated sprinkling system, pre-desulfurization spray system
With limestone slurry liquid preparing system；Described lime stone slurry circulated sprinkling system includes circulating pump and is positioned at the spray of desulfurizing tower
Layer, the entrance of described circulating pump connects with serum recycle pond, and outlet connects with spraying layer, and described pre-desulfurization spray system includes pre-
Desulfuration recycle pump and the pre-desulfuration spraying tube being positioned at desulfurizing tower smoke inlet flue, the entrance of described pre-desulfuration recycle pump and slurry
Liquid circulatory pool connects, and outlet connect with pre-desulfuration spraying tube, the lime stone slurry of described limestone slurry liquid preparing system export and
Serum recycle pond connects.
Efficient small coal-firing units gas desulfurization device the most according to claim 1, it is characterised in that: described limestone slurry
Liquid preparing system includes being positioned at top, serum recycle pond and the limestone powder bin being sequentially communicated from top to bottom, screw(-type) feeder and ash
Water mixer, the lime stone slurry outlet of described ash water mixer connects with serum recycle pond.
Efficient small coal-firing units gas desulfurization device the most according to claim 1, it is characterised in that: described serum recycle
Agitator it is provided with in pond.
Efficient small coal-firing units gas desulfurization device the most according to claim 1, it is characterised in that: described serum recycle
The bottom in pond is provided with oxidation air device, and the form of described oxidation air device is grating type.
Efficient small coal-firing units gas desulfurization device the most according to claim 1, it is characterised in that: described desulfurizer
Also include that slurry pump and gypsum dehydration system, described gypsum dehydration system include cyclone and the vacuum belt being connected with cyclone
Dewaterer, the entrance of described slurry pump connects with serum recycle pond, and outlet connects with cyclone, and the overflowing liquid of described cyclone goes out
Mouth connects with serum recycle pond respectively with the filtrate (liquid of vacuum belt dewaterer.
Efficient small coal-firing units gas desulfurization device the most according to claim 1, it is characterised in that: described pre-desulfurization is sprayed
The spray direction of shower pipe is relative with flue gas flow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610755150.2A CN106139877A (en) | 2016-08-29 | 2016-08-29 | Efficient small coal-firing units gas desulfurization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610755150.2A CN106139877A (en) | 2016-08-29 | 2016-08-29 | Efficient small coal-firing units gas desulfurization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106139877A true CN106139877A (en) | 2016-11-23 |
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ID=57343817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610755150.2A Pending CN106139877A (en) | 2016-08-29 | 2016-08-29 | Efficient small coal-firing units gas desulfurization device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107413178A (en) * | 2017-07-21 | 2017-12-01 | 华润电力（贺州）有限公司 | A kind of mutual dewatering system of falling desulfurization slurry of double tower |
| CN109224817A (en) * | 2018-10-31 | 2019-01-18 | 武汉龙净环保科技有限公司 | Pre- spray sprays integral system with accident |
| CN109499304A (en) * | 2018-12-27 | 2019-03-22 | 朱敬 | The device and technique of sulfur dioxide in a kind of efficient removal coal-fired flue-gas |
| CN111054197A (en) * | 2019-12-30 | 2020-04-24 | 江苏垦乐节能环保科技有限公司 | Semi-dry deep desulfurization method for sulfur-containing flue gas |
-
2016
- 2016-08-29 CN CN201610755150.2A patent/CN106139877A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107413178A (en) * | 2017-07-21 | 2017-12-01 | 华润电力（贺州）有限公司 | A kind of mutual dewatering system of falling desulfurization slurry of double tower |
| CN107413178B (en) * | 2017-07-21 | 2023-04-28 | 华润电力（贺州）有限公司 | Double-tower mutually inverted desulfurization slurry dehydration system |
| CN109224817A (en) * | 2018-10-31 | 2019-01-18 | 武汉龙净环保科技有限公司 | Pre- spray sprays integral system with accident |
| CN109499304A (en) * | 2018-12-27 | 2019-03-22 | 朱敬 | The device and technique of sulfur dioxide in a kind of efficient removal coal-fired flue-gas |
| CN111054197A (en) * | 2019-12-30 | 2020-04-24 | 江苏垦乐节能环保科技有限公司 | Semi-dry deep desulfurization method for sulfur-containing flue gas |
| CN111054197B (en) * | 2019-12-30 | 2022-04-22 | 江苏垦乐节能环保科技有限公司 | Semi-dry deep desulfurization method for sulfur-containing flue gas |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161123 |
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| WD01 | Invention patent application deemed withdrawn after publication |