CN106861406A - Sulfur method in a kind of pulverized coal furnace - Google Patents
Sulfur method in a kind of pulverized coal furnace Download PDFInfo
- Publication number
- CN106861406A CN106861406A CN201710028675.0A CN201710028675A CN106861406A CN 106861406 A CN106861406 A CN 106861406A CN 201710028675 A CN201710028675 A CN 201710028675A CN 106861406 A CN106861406 A CN 106861406A
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- CN
- China
- Prior art keywords
- furnace
- pulverized coal
- sulfur method
- coal
- pulverized
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- 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
- 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
Sulfur method in a kind of pulverized coal furnace, belongs to flue gases purification field.The quick lime that the present invention uses granularity larger is raw material, is prepared into desulfurizer slurry, is then sprayed into the suitable temperature section of pulverized-coal fired boiler, realizes desulfuration in furnace.Compared with sulfur method in existing pulverized coal furnace, the present invention there is raw material to prepare expense is low, desulfuration efficiency is high, the simple advantage of implementing process, can be used to generate electricity and the pulverized-coal fired boiler pollutant catabolic gene link of industrial process.
Description
Technical field
The present invention relates to a kind of furnace purge method of combustion apparatus flue gas, more particularly to a kind of coal-powder boiler desulfuration in furnace side
Method, belongs to environmental technology field.
Background technology
Pulverized-coal fired boiler is widely used in the fields such as coal fired power plant, industrial process, is a kind of important coal-burning facility.Due to
Coal dust firing temperature is higher, and flue gas is shorter in residing time in furnace, causes the efficiency comparison of existing desulfuration in furnace technology low.Face
To increasingly strict environmental regulation, most purposes that high-efficiency desulfurization is realized by the way of tail flue gas desulfurization, bring throwing at present
Money and operating cost economy problems high.Carry out efficient pulverized coal furnace inner desulfurization technology exploitation still needs with larger industry
Ask.
Conventional coal-powder boiler desulfuration in furnace mainly realized by the way of desulfurizing agent is sprayed into stove, can spray into lime stone CaCO3、
MgO etc., because the desulphurization reaction is gas-solid reaction, the low problem of sorbent utilization that high temperature sintering brings is not only existed, and
And sweetening process is substantially influenceed by desulfurizing agent particle diameter.Under conditions of residing time in furnace is shorter, the larger desulfurization of particle diameter
Agent utilization rate is substantially influenceed by interior external diffusion (extraneous gas with particle bulk inside), and utilization rate is substantially low.And use grain
The less desulfurizing agent powder granule in footpath, although its inside and outside diffusion conditions improved, sorbent utilization it is higher, there is desulfurization
Agent cost of material economy problems high.
In view of the pollutant catabolic gene demand that pulverized-coal fired boiler large-scale application is faced, develops efficient, investment and operating cost
Low desulfuration in furnace technology is the striving direction of numerous environmentalists.
The content of the invention
The purpose of the present invention is to realize prepared by a kind of process is simple, equipment and raw material to be taken off in the low high-efficiency pulverized coal stove stove of expense
Sulphur method.
Sulfur method in a kind of pulverized coal furnace that the present invention is provided, it is characterised in that the method comprises the following steps：
1) quicklime particles of 10~200mm of average grain diameter are poured into aqueous solution, the mass ratio of moisture and quick lime
It is 3:1~20:1,5~30 minutes are stood, then stir, prepare desulfurizer slurry；
2) desulfurizer slurry that will be prepared uniformly is sprayed into coal-powder boiler, is sprayed into mean drop diameter and is not more than 1mm, calcium sulphur
Mol ratio is 1~10, and it is 300~1000 DEG C of spaces of temperature section to spray into flue gas mean temperature after position is located at coal dust firing area
It is interior, carry out desulfuration in furnace.
Sulfur method in described pulverized coal furnace, it is characterised in that：CaO content is at least in described quicklime particles
80%.
Sulfur method in described pulverized coal furnace, it is characterised in that step 1) in mixing time be 5~30 minutes.
The present invention compared with prior art, with advantages below and beneficial effect：1. realized in stove using economic method
Desulfurizing agent particle diameter reduces：Using in desulfurizer slurry prepared by this method, sorbent particle particle diameter is small, and it is micro- that average grain diameter is about 10
Rice；Process is sprayed into by controlling slurries, desulfuration in furnace agent particle size tinyization is realized, its utilization rate is significantly improved.With it is existing
Have outside stove and prepare fine powder desulfurizing agent technology and compare, the expense of desulfurizing agent raw material preparation is greatly reduced.2. tiny sorbent particle
There is preferable diffusion in stove, the purpose of desulfurization can be realized in the range of 300~1000 DEG C of flue-gas temperatures, and due to it
Trace performance is superior, compared to the desulfurizing agent of larger granularity, alleviates sorbent particle and is urged in heated surface at the end of boiler and SCR
The deposition degree in agent area.It is of the invention compared with existing pulverized coal furnace inner desulfurization technology in a word, with expense of raw materials is low, desulfurization effect
Rate is high, the simple advantage of implementing process, can be used for the pulverized-coal fired boiler pollutant catabolic gene link generated electricity with industrial process.
Specific embodiment
The course of work of the invention is further illustrated below.Main embodiment is as follows：
1) quicklime particles of 10~200mm of average grain diameter are poured into aqueous solution, the mass ratio of moisture and quick lime
It is 3:1~20:1,5~30 minutes are stood, then stir, mixing time is 5~30 minutes, prepares desulfurizing agent slurry
Liquid；
2) desulfurizer slurry that will be prepared uniformly is sprayed into coal-powder boiler, is sprayed into mean drop diameter and is not more than 1mm, calcium sulphur
Mol ratio is 1~10, and it is in 300~1000 DEG C of space, to carry out to spray into flue gas mean temperature after position is located at coal dust firing area
Desulfuration in furnace.
CaO content is at least 80% in quicklime particles of the present invention.
Embodiment：One thermal power is the industrial coal powder boiler of 29MW, and Coal-fired capacity is about 5t/h, and sulfur content of coal is
0.6%.It is the quicklime particles of 50mm to use average grain diameter, and CaO content is 95%.According to calcium to sulphur mole ratio be 4 when, quick lime
Consumption be about 220kg/h.It is 5 according to moisture and Lime Quality ratio：1 prepare slurries, it is necessary to moisture be 1.1t/h.Will be raw
Lime is added to the water, and stands 10 minutes, then stirs 20 minutes, prepares desulfurizer slurry.Using slurries pump by desulfurization
Agent slurries are delivered to boiler, and desulfurizer slurry nozzle is set in 800 DEG C of smoke-gas areas of upper furnace, and desulfurizer slurry is uniform
Spray into flue gas, the slurry droplet average grain diameter that nozzle sprays is 100 microns.Measure desulfuration efficiency and be about 75%.
Claims (3)
1. sulfur method in a kind of pulverized coal furnace, it is characterised in that the method comprises the following steps：
1) quicklime particles of 10~200mm of average grain diameter are poured into aqueous solution, moisture content is 3 with the mass ratio of quick lime:1
~20:1,5~30 minutes are stood, then stir, prepare desulfurizer slurry；
2) desulfurizer slurry that will be prepared uniformly is sprayed into coal-powder boiler, is sprayed into mean drop diameter and is not more than 1mm, calcium sulphur mole
Than being 1~10, it is in 300~1000 DEG C of spaces of temperature section, to enter to spray into flue gas mean temperature after position is located at coal dust firing area
Row desulfuration in furnace.
2. sulfur method in pulverized coal furnace according to claim 1, it is characterised in that：CaO in described quicklime particles
Percentage composition be at least 80%.
3. according to sulfur method in a kind of pulverized coal furnace described in claim 1 or 2, it is characterised in that step 1) in stirring when
Between be 5~30 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710028675.0A CN106861406A (en) | 2017-01-16 | 2017-01-16 | Sulfur method in a kind of pulverized coal furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710028675.0A CN106861406A (en) | 2017-01-16 | 2017-01-16 | Sulfur method in a kind of pulverized coal furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106861406A true CN106861406A (en) | 2017-06-20 |
Family
ID=59159087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710028675.0A Pending CN106861406A (en) | 2017-01-16 | 2017-01-16 | Sulfur method in a kind of pulverized coal furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106861406A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306305A (en) * | 2008-07-13 | 2008-11-19 | 兖矿国宏化工有限责任公司 | Fume eject-calcium desulfurizing techinique in pulverized coal fired boiler |
-
2017
- 2017-01-16 CN CN201710028675.0A patent/CN106861406A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306305A (en) * | 2008-07-13 | 2008-11-19 | 兖矿国宏化工有限责任公司 | Fume eject-calcium desulfurizing techinique in pulverized coal fired boiler |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170620 |
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| RJ01 | Rejection of invention patent application after publication |