CN110115903A - A kind of blending industrial refuse fires the flue gas processing method of building porcelain granule - Google Patents
A kind of blending industrial refuse fires the flue gas processing method of building porcelain granule Download PDFInfo
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- CN110115903A CN110115903A CN201910504114.2A CN201910504114A CN110115903A CN 110115903 A CN110115903 A CN 110115903A CN 201910504114 A CN201910504114 A CN 201910504114A CN 110115903 A CN110115903 A CN 110115903A
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- flue gas
- concentration
- processing method
- fires
- gas processing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- 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
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- 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
Abstract
The invention discloses the flue gas processing methods that a kind of blending industrial refuse fires building porcelain granule, include the following steps: dust capture and the SO of spraying layer2Absorb, wet electric precipitator trapping and sedimentation, dedusting slurries layered shaping, vacuum belt machine separation solid phase and underflow liquid, underflow liquid reuse and excessive water he use；Advantageous effect of the invention is, first, flue gas processing method of the invention is high to smoke moisture, dust concentration is high and sulfur dioxide height pre-processes, and the general index for flue gas reaches wet desulphurization that treated can reduce the processing load of follow-up system and promote gypsum qualitt；Secondly, flue gas processing method of the invention carries out sufficient, processing repeatedly to the solid phase particles in slurries, the application standard of meeting flowing water is fully achieved, and the dust in recovered flue gas is as haydite kiln raw material, secondary pollution is not only avoided, and realizes the recycling of raw material.
Description
Technical field
The present invention relates to the flue gases that environmental protection technical field more particularly to a kind of blending industrial refuse fire building porcelain granule
Processing method.
Background technique
Currently, firing light ceramic for building using haydite kiln has become a set of maturation method, but it generally uses nothing
The raw material such as pollution or the very low clay of pollutant load, subsequent fume treatment can be real using dry electric precipitation or bag-type dust
Existing qualified discharge.But part enviromental protection enterprise handles Industrial Solid Waste by the way of haydite kiln baking ceramsite, due to Industrial Solid Waste
Heavy metal, water content and other pollutant loads it is high (sulfur-bearing can achieve 6% or more in copper sludge), formed low temperature, high humidity,
The kiln gas of high pollution object concentration cannot be handled using original cloth bag or dry electric precipitator.
Summary of the invention
1. the technical issues that need to address
The technical problem to be solved in the invention is, at the flue gas for providing a kind of blending industrial refuse firing building porcelain granule
Reason method is reduced the temperature of hot industry exhaust gas by the way of multistage atomizing spray, absorbs most of dioxy in flue gas
Change sulphur, and traps most of dust in flue gas.In addition, further being trapped in flue gas by wet electric precipitation demister
The droplet and dust of entrainment reach requirement of the subsequent wet sulfur removal technology to Gas Parameters.
2. technical solution
To achieve the goals above, the technical scheme is that a kind of blending industrial refuse fires the cigarette of building porcelain granule
Gas disposal method, includes the following steps:
Step 1, kiln gas enters spray column, inversely contacts by two layers of spraying layer, and with the shower water of reflux, captures
98% or more dust in flue gas, the SO for absorbing 75% or more2, and the temperature of the flue gas is down to 60 DEG C or so；
Step 2, condensed water, dust and the SO of the spraying layer in step 1 are left2It traps to obtain by wet electric precipitator
Dedusting slurries, and fall into the overflow launder of spray tower bottom；
Step 3, the dedusting slurries in step 2 flow into concentration and settlement pond, and the lower supernatant of solid concentration is pumped to eddy flow
Device, concentration and settlement pond described in isolated clear liquid return value, in isolated solid phase and concentration and settlement pond solid concentration compared with
High underflow liquid flows into vacuum belt machine together；
Step 4, the vacuum belt machine of step 3 treated solid phase and underflow liquid, solid concentration is lower than 0.5% after processing
Clear liquid enters reservoir, and treated, and solid phase particles are gathered into filter cake is back to haydite kiln；
Step 5, the clear liquid for entering step 4 reservoirs is handled by air cooling heat exchanger, after temperature is down to 30 DEG C or so,
The spraying layer for being pumped to step 1 is atomized into the shower water of the reflux, and excessive water send used for other purposes.
Above-mentioned blending industrial refuse fires the flue gas processing method of building porcelain granule, wherein in the step 1, two layers of institute
The spacing for stating spraying layer is 2.2m~2.5m, the spacing of spraying layer and spray column air inlet top described in lower layer be 2.5m~
2.8m。
Above-mentioned blending industrial refuse fires the flue gas processing method of building porcelain granule, wherein the spray column in the step 1
Interior flue gas flow rate is 4.5m/s~5.5m/s, and the flue gas is 0.8s~1.2s in the residence time of two layers of spraying layer.
Above-mentioned blending industrial refuse fires the flue gas processing method of building porcelain granule, wherein the wet electric precipitation of the step 2
The speed of device electric field is 1.5m/s~2.5m/s, is 2.3s~2.7s by the time.
Above-mentioned blending industrial refuse fires the flue gas processing method of building porcelain granule, wherein the concentration in the step 3 is heavy
It drops pond and uses open by design, overflow liquid level mouth is arranged away from horizontal plane 1.2m~1.5m.
Above-mentioned blending industrial refuse fires the flue gas processing method of building porcelain granule, wherein the concentration in the step 3 is heavy
It drops pond and is configured with blender, avoid particulate matter sedimentation agglomeration.
Above-mentioned blending industrial refuse fires the flue gas processing method of building porcelain granule, wherein the concentration in the step 3 is heavy
It drops pond and is configured with PH detector, detection signal is used to control the charging of lime slurry, to control the PH in the concentration and settlement pond
Value is between 6.5~7.5.
Above-mentioned blending industrial refuse fires the flue gas processing method of building porcelain granule, wherein the quality of the lime slurry
Concentration is 17%~23%.
3. beneficial effect
In summary, the beneficial effects of the present invention are:.
(1) flue gas processing method of the invention is high to smoke moisture, dust concentration is high and sulfur dioxide height is located in advance
Reason, the general index for flue gas reaches wet desulphurization that treated, can reduce the processing load of follow-up system and promote gypsum
Quality；
(2) flue gas processing method of the invention carries out sufficient, processing repeatedly to the solid phase particles in slurries, reaches completely
It attends the meeting the application standard of flowing water, and the dust in recovered flue gas not only avoids secondary pollution as haydite kiln raw material, and
Realize the recycling of raw material.
Specific embodiment
A kind of blending industrial refuse of the present invention fires the flue gas processing method of building porcelain granule, is generally used for industrial refuse firing
The fume treatment of haydite can also handle the flue gas that other similar kiln generates.
A kind of blending industrial refuse fires the flue gas processing method of building porcelain granule, includes the following steps:
Step 1, kiln gas enters spray column, inversely contacts by two layers of spraying layer, and with the shower water of reflux, captures
98% or more dust in flue gas, the SO for absorbing 75% or more2, and the temperature of the flue gas is down to 60 DEG C or so；Flue gas warp
Spraying layer is crossed, flue-gas temperature is condensed to 60 DEG C or so.Vapor is in a saturated state, gaseous state water content partial pressure about 20%, i.e., dry
The 25% of flue gas.The 60% of ingredient is vapor, i.e. the 150% of dry flue gas in kiln gas.Therefore, by spraying layer, about 5/6
Water condensation be liquid, meanwhile, single layer desulfuration efficiency 50%~60%, the double-deck desulfuration efficiency is about the 75% of total amount, i.e. pre-suction
About 75% sulfur dioxide is received, the sulfur dioxide concentration in flue gas is reduced.
Step 2, condensed water, dust and the SO of the spraying layer in step 1 are left2It traps to obtain by wet electric precipitator
Dedusting slurries, and fall into the overflow launder of spray tower bottom；
Step 3, the dedusting slurries in step 2 flow into concentration and settlement pond, and the lower supernatant of solid concentration is pumped to eddy flow
Device, concentration and settlement pond described in isolated clear liquid return value, in isolated solid phase and concentration and settlement pond solid concentration compared with
High underflow liquid flows into vacuum belt machine together；
Step 4, the vacuum belt machine of step 3 treated solid phase and underflow liquid, solid concentration is lower than 0.5% after processing
Clear liquid enters reservoir, and treated, and solid phase particles are gathered into filter cake is back to haydite kiln, wherein the moisture content of the filter cake
10%~20%, and contain a small amount of gypsum；
Step 5, the clear liquid for entering step 4 reservoirs is handled by air cooling heat exchanger, after temperature is down to 30 DEG C or so,
The spraying layer for being pumped to step 1 is atomized into the shower water of the reflux, and excessive water send used for other purposes.
Preferably, in the step 1, the spacing of two layers of spraying layer is 2.2m~2.5m, spraying layer described in lower layer
Spacing with spray column air inlet top is 2.5m~2.8m.
Preferably, the flue gas flow rate in the spray column in the step 1 is 4.5m/s~5.5m/s, and the flue gas is two
The residence time of layer spraying layer is 0.8s~1.2s.
Preferably, the speed of the wet Electric Field in ESP of the step 2 is 1.5m/s~2.5m/s, is by the time
2.3s~2.7s.
Preferably, the concentration and settlement pond in the step 3 uses open by design, and overflow liquid level mouth is arranged away from horizontal plane
1.2m~1.5m.
Preferably, the concentration and settlement pond in the step 3 is configured with blender, avoids particulate matter sedimentation agglomeration.
Preferably, the concentration and settlement pond in the step 3 is configured with PH detector, and detection signal is for controlling lime
The charging of slurries, to control the pH value in the concentration and settlement pond between 6.5~7.5.
Preferably, the mass concentration of the lime slurry is 17%~23%, is avoided less with water and as far as possible as far as possible
Line clogging.
Embodiment 1:
Certain environmental protection treatment project, the parameter of flue gas are as described below: haydite kiln flue gas 120000m3/ h, 115 DEG C ± 10 of temperature
DEG C, steam partial pressure about 70%, dust content about 120g/Nm3, SO2Concentration about 17g/Nm3；Meanwhile the capital equipment of spray column
Size is as described below: spraying layer diameter is Φ 4.3m；The round wet electricity of spraying layer top setting, diameter are Φ 5.4m, effective height
For 5.5m.Using above-mentioned flue gas processing method by processing, fume indication 20g/Nm3Reach design requirement.
It is above-described to be merely a preferred embodiment of the present invention, it is not intended to limit the scope of the invention, all benefits
The equivalent structure transformation made by present specification, directly or indirectly with the technology for being attached to other Related products
Field is included within the scope of the present invention.
Claims (8)
1. the flue gas processing method that a kind of blending industrial refuse fires building porcelain granule, which comprises the steps of:
Step 1, kiln gas enters spray column, inversely contacts by two layers of spraying layer, and with the shower water of reflux, captures flue gas
In 98% or more dust, absorb 75% or more SO2, and the temperature of the flue gas is down to 60 DEG C or so；
Step 2, condensed water, dust and the SO of the spraying layer in step 1 are left2It traps to obtain dedusting by wet electric precipitator
Slurries, and fall into the overflow launder of spray tower bottom；
Step 3, the dedusting slurries in step 2 flow into concentration and settlement pond, and the lower supernatant of solid concentration is pumped to cyclone, point
From concentration and settlement pond described in obtained clear liquid return value, the higher bottom of solid concentration in isolated solid phase and concentration and settlement pond
Flow liquid flows into vacuum belt machine together；
Step 4, the vacuum belt machine of step 3 treated solid phase and underflow liquid, solid concentration is lower than 0.5% clear liquid after processing
Into reservoir, treated, and solid phase particles are gathered into filter cake is back to haydite kiln；
Step 5, the clear liquid for entering step 4 reservoirs is handled by air cooling heat exchanger, after temperature is down to 30 DEG C or so, pumping
The shower water of the reflux is atomized into the spraying layer of step 1, excessive water send used for other purposes.
2. a kind of blending industrial refuse according to claim 1 fires the flue gas processing method of building porcelain granule, feature exists
In: in the step 1, the spacing of two layers of spraying layer is 2.2m~2.5m, spraying layer described in lower layer and spray column air inlet
The spacing on top is 2.5m~2.8m.
3. a kind of blending industrial refuse according to claim 2 fires the flue gas processing method of building porcelain granule, feature exists
In: the flue gas flow rate in spray column in the step 1 is 4.5m/s~5.5m/s, stop of the flue gas in two layers of spraying layer
Time is 0.8s~1.2s.
4. a kind of blending industrial refuse according to claim 1 fires the flue gas processing method of building porcelain granule, feature exists
In: the speed of the wet Electric Field in ESP of the step 2 is 1.5m/s~2.5m/s, is 2.3s~2.7s by the time.
5. a kind of blending industrial refuse according to claim 1 fires the flue gas processing method of building porcelain granule, feature exists
In: the concentration and settlement pond in the step 3 uses open by design, and overflow liquid level mouth is arranged away from horizontal plane 1.2m~1.5m.
6. a kind of blending industrial refuse according to claim 5 fires the flue gas processing method of building porcelain granule, feature exists
In: the concentration and settlement pond in the step 3 is configured with blender, avoids particulate matter sedimentation agglomeration.
7. a kind of blending industrial refuse according to claim 6 fires the flue gas processing method of building porcelain granule, feature exists
In: the concentration and settlement pond in the step 3 is configured with PH detector, and detection signal is used to control the charging of lime slurry, with
The pH value in the concentration and settlement pond is controlled between 6.5~7.5.
8. a kind of blending industrial refuse according to claim 7 fires the flue gas processing method of building porcelain granule, feature exists
In: the mass concentration of the lime slurry is 17%~23%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910504114.2A CN110115903A (en) | 2019-06-12 | 2019-06-12 | A kind of blending industrial refuse fires the flue gas processing method of building porcelain granule |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910504114.2A CN110115903A (en) | 2019-06-12 | 2019-06-12 | A kind of blending industrial refuse fires the flue gas processing method of building porcelain granule |
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| CN110115903A true CN110115903A (en) | 2019-08-13 |
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| CN201910504114.2A Pending CN110115903A (en) | 2019-06-12 | 2019-06-12 | A kind of blending industrial refuse fires the flue gas processing method of building porcelain granule |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115677374A (en) * | 2022-11-15 | 2023-02-03 | 北京科技大学 | Method for condensing wet flue gas at condensation section of ceramsite roasting kiln |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1850733A (en) * | 2006-05-11 | 2006-10-25 | 上海申川环保科技有限公司 | Method and apparatus for recovering sulfer dioxide from smoke and producing thiamine fertilizer |
| US7294322B2 (en) * | 2002-06-10 | 2007-11-13 | The Babcock & Wilcox Company | Collection scoop for flue gas desulfurization systems with bleed streams or ex situ forced oxidation |
| CN104069729A (en) * | 2014-07-04 | 2014-10-01 | 中国海诚工程科技股份有限公司 | Regeneration flue gas desulfurization and absorption liquid circulation treating process |
| CN107321154A (en) * | 2017-05-16 | 2017-11-07 | 上海交通大学 | A kind of ammonia type flue gas desulfurizing system and method |
-
2019
- 2019-06-12 CN CN201910504114.2A patent/CN110115903A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7294322B2 (en) * | 2002-06-10 | 2007-11-13 | The Babcock & Wilcox Company | Collection scoop for flue gas desulfurization systems with bleed streams or ex situ forced oxidation |
| CN1850733A (en) * | 2006-05-11 | 2006-10-25 | 上海申川环保科技有限公司 | Method and apparatus for recovering sulfer dioxide from smoke and producing thiamine fertilizer |
| CN104069729A (en) * | 2014-07-04 | 2014-10-01 | 中国海诚工程科技股份有限公司 | Regeneration flue gas desulfurization and absorption liquid circulation treating process |
| CN107321154A (en) * | 2017-05-16 | 2017-11-07 | 上海交通大学 | A kind of ammonia type flue gas desulfurizing system and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115677374A (en) * | 2022-11-15 | 2023-02-03 | 北京科技大学 | Method for condensing wet flue gas at condensation section of ceramsite roasting kiln |
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Application publication date: 20190813 |
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