CN107569998A - A kind of mine tailing smelts three wastes desulphurization system and method - Google Patents
A kind of mine tailing smelts three wastes desulphurization system and method Download PDFInfo
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- CN107569998A CN107569998A CN201710889056.0A CN201710889056A CN107569998A CN 107569998 A CN107569998 A CN 107569998A CN 201710889056 A CN201710889056 A CN 201710889056A CN 107569998 A CN107569998 A CN 107569998A
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Abstract
The present invention relates to industrial waste gas technical field of desulfurization, particularly relate to a kind of mine tailing and smelt three wastes desulphurization system and method, it includes desulfurization absorption plant, slurrying pond, primary cycle pond, secondary cycle pond and dehydration device, utilize the adsorption tower of two series connection, coordinate the milk of lime of the 15% concentration circulation absorption sulfur dioxide gas in heterophase reactor, the sulfur dioxide of absorption forms HSO3 ‑And fully it is oxidized to SO4 2‑, the sulfur dioxide in flue gas is fully absorbed, refined lime consumption of the present invention is few, energy consumption is low, refined lime strong applicability, and emission reduction effect is splendid, is advantageous to environmental protection, has good popularizing application prospect, and desulfuration efficiency is up to 99%.
Description
Technical field
The present invention relates to industrial waste gas technical field of desulfurization, particularly relates to a kind of mine tailing and smelts three wastes desulphurization system and side
Method.
Background technology
Desulfurizing tower of the prior art is easily to produce scale formation using circulation form in tower body slurries, tower body inside,
Tower body inner wall space is caused to taper into, operation is obstructed, it is often necessary to clears up tower body inwall.Because desulfurizing tower is to use tower body
Circulation form in slurries, absorb SO2The HSO of formation3 -Tower inner sealing environment can not be aoxidized sufficiently the problems such as.In addition,
The desulfuration efficiency of prior art is low, and tail gas does not reach discharge standard.
The content of the invention
In view of this, the technical problems to be solved by the invention, exactly propose a kind of mine tailing smelt three wastes desulphurization system and
Method.
In order to solve the above technical problems, the present invention is achieved using following technical scheme：
A kind of mine tailing smelts three wastes desulphurization system, including desulfurization absorption plant, slurrying pond, primary cycle pond, secondary cycle
Pond and dehydration device, the desulfurization absorption plant include first grade absorption tower and two-level absorption tower, in the tower body on two absorption towers all
Heterophase reactor is set, and gas vent and serum outlet are designed with respectively with bottom at the top of the tower body on two absorption towers, it is described
The heterophase reactor connection flue of first grade absorption tower, for receiving the pending flue gas containing sulfur dioxide, the two level absorbs
The heterophase reactor of tower connects with the gas vent of first grade absorption tower, the gas vent connection smoke aloft of the two-level absorption tower
Chimney；Spray pump is designed with the primary cycle pond and secondary cycle pond, and primary cycle pond and secondary cycle pond all pass through spray
Shower pipe connects the heterophase reactor in two-level absorption tower and first grade absorption tower respectively, and the slurry of first grade absorption tower and two-level absorption tower
Liquid outlet is all connected with secondary cycle pond and primary cycle pond respectively by circulating slot, realizes two circulatory pools and two absorption towers
Between circulation desulfurization processing；The slurrying pond is used to prepare absorbent, and slurrying pond is connected with the primary cycle pond, described
Slurries in primary cycle pond are entered in secondary cycle pond by overflow；In addition, the secondary cycle pond connects with dehydration device,
Dehydration device is used to be dehydrated to obtain desulfurated plaster by the slurries in secondary cycle pond, and the water taken off is delivered to the geosyncline that catchments.
Preferably, it is provided with aerator in the secondary cycle pond, the aerator includes Roots blower, total
Tracheae, some bronchuses and aeration tube, the gas main connect Roots blower and bronchus respectively, and the bronchus is set up
On the secondary cycle pond, and some gas outlets are offered on bronchus, the aeration tube upper end and bronchial gas outlet
Connection, aeration tube lower end leads to secondary cycle pond bottom of pond.
Preferably, the bottom of towe of the first grade absorption tower and two-level absorption tower is designed with gas-liquid separation cone bucket, for reality
The separation of existing gas and slurries, isolated gas and slurries are exported by gas vent and serum outlet respectively.
Preferably, the absorbent prepared in the slurrying pond is that the concentration that agstone is mixed to get with water is 15%
Lime slurry.
Preferably, all spread in the first grade absorption tower, two-level absorption tower and primary cycle pond and secondary cycle pond
Provided with Corrosion Protection of Fiber Reinforced Plastics layer.
Preferably, it is designed with mixer in the primary cycle pond and secondary cycle pond.
Preferably, the dehydration device includes dehydration pump and filter press, and the dehydration pump is by secondary cycle pond
Slurries are pumped to filter press and are dehydrated to obtain desulfurated plaster, and the geosyncline that catchments connects with slurrying pond, for providing water for slurrying.
A kind of mine tailing smelts three wastes sulfur method, comprises the following steps：
(1) agstone and water are proportionally added into slurrying pond, the lime slurry that concentration is 15% is made；
(2) slurries in primary cycle pond are entered in secondary cycle pond by overflow, treat that the slurries in primary cycle pond start
When overflow is entered in secondary cycle pond, spray pump and mixer in two circulatory pools, while the cigarette on first grade absorption tower are opened
Road starts to be passed through the waste gas containing sulfur dioxide, proceeds by desulfurization；
(3) gas after first grade absorption tower processing and slurries respectively enter two-level absorption tower and secondary cycle pond, wherein gas
Body continues the desulfurization in two-level absorption tower, and slurries are followed by shower and circulating slot between first grade absorption tower and secondary cycle pond
Ring inhales sulphur；Aerator is aerated in secondary cycle pond, the HSO for allowing sulfur dioxide therein to be formed3 -Fully it is oxidized to SO4 2-；
(4) gas after two-level absorption tower processing and slurries respectively enter high-altitude chimney and primary cycle pond, wherein gas
Emptied in the chimney of high-altitude, slurries are circulated by shower and circulating slot between two-level absorption tower and primary cycle pond inhales sulphur；
(5) slurries in secondary cycle pond enter in dehydration device and are dehydrated, and are dehydrated to obtain desulfurated plaster through filter press,
The water taken off enters water source of the geosyncline as slurrying pond that catchment.
Compared with prior art, the device have the advantages that being：After the desulphurization system desulfurization of the present invention, obtained gas
Content of sulfur dioxide is 100mg/m in body3, it is much smaller than<Industrial furnace atmosphere pollutants emission standardses>(GB9078-1996) two
Level standard value：400mg/m3, desulfuration efficiency are more than 99%, greatly reduce the amount that sulfur dioxide is discharged into air, this
Outside, agstone consumption of the present invention is small.
Brief description of the drawings
Fig. 1 is the schematic diagram of inventive desulfurization device.
Embodiment
To allow those skilled in the art to become apparent from getting information about the present invention, below in conjunction with accompanying drawing, and with Xinshao
Exemplified by Chen Zhouti industry Co., Ltd, the desulfurized effect of the present invention is described further.
Xinshao occasion state day processing antimony, 50 tons of Gold Concentrate under Normal Pressure, concentrate sulfur-bearing 25% or so, deduct the sulphur into antimony sulfonium, then produce
Tail gas contains SO216 tons, i.e., 16/22=0.8T/h per hour, blast furnace tail gas exhaust gas volumn is 48500m3/ h (SO2 emissions
For 13500m3/ h), it is that JX- heterophase reactors (separately have milk of lime to prepare workshop, Tail water reuse that sulfur dioxide, which administers main device,
System) processing after empty, tail gas concentration is 850mg/m through measured concentration3More than, it can not meet discharging standards.【<
Industrial furnace atmosphere pollutants emission standardses>(GB9078-1996) secondary standard standard value：400mg/m3】
Xinshao occasion state three wastes desulphurization system will put into production in the end of the year 2006, and run time has reached design period, rotten
Erosion is more serious.Because tail gas sulphur dioxide discharge is exceeded, the smelting subsidiary under Gold Group all suffers from closing pyrogenic process
The crisis of smelting
Principle：Using JX- heterophase reactors, the equipment is absorbed using air-liquid cocurrent, point of the liquid in inside reactor
In the presence of liquid, air guide, multilayer liquid film is dispersed into, the flue gas of co-flow is when each passes through liquid film, by liquid film
Small droplet that is thin, and being atomized into certain particle size is drawn, strengthens the mass transfer between air-liquid.The liquid film and droplet that absorbing liquid is formed are in multiphase
It is constantly changing flow velocity and flow direction in reactor, in liquid, occurs strong relative motion between liquid and solid, acceleration molecular,
The diffusion of ion, so as to improve reaction speed.Because JX- heterophase reactor internal structures are identical, inhaled using gas and liquid flowing mode
Receive, can stable operation in the case of using different absorbents.In the process of running, lime is used as absorbent.
The reaction speed of calcium-base absorbing agent desulfurization depends on four rate controlling steps, i.e. SO2Absorb, HSO3 -Oxidation, inhale
Receive agent dissolving and the crystallization of gypsum：
1、SO2Absorb
SO2+H2O→H2SO3；H2SO3→H++HSO3 -；HSO3 -→H++SO3 2-；
According to " double films " absorption approach, SO2Belong to moderate solubility gas in water, Henry'S coefficient m values are medium, mass transfer velocity
By air film, liquid film controlled, when having dissolved in absorbent, SO in absorbing liquid2In liquid film and Ca2+Reaction is consumed, and liquid film expands
Scattered resistance declines rapidly, and enhancement factor in chemical absorption E depends on absorbing the speed of chemical reaction.Gas-film controlled, which absorbs, to be passed through
Increase gas liquid interfacial area to improve absorption rate.
2、HSO3 -Aoxidize HSO3 -+1/2O2→HSO4 -
When pH value is 4.5~5.5, impurity Mn in absorbent2+Catalytic action is risen to oxidation reaction.
3rd, the dissolving of absorbent
Absorbent 5 steps of dissolving point are carried out：
a)H+、SO4 2-(external diffusion) is spread to absorbent surface
b)H+、SO4 2-Inwardly spread from absorbent surface (interior diffusion)
c)H+、SO4 2-Chemical reaction (Control of chemical reaction) occurs with absorbent
d)Ca2+、CaSO4Diffused to the surface inside absorbent (interior diffusion)
e)Ca2+、CaSO4(external diffusion) is spread into solution from absorbent surface
The power of diffusion is the concentration difference of molecule, ion, and the relative motion between liquid internal, liquid and solid can be strengthened
The diffusion of molecule, ion, so as to accelerate in the dissolving of absorbent and in its surface, the internal chemical reaction occurred.Reduce and absorb
The particle diameter of agent can increase the specific surface area of absorbent, reduce the resistance of interior diffusion.
4th, the crystallization of gypsum
Ca2++SO4 2-+2H2O→CaSO4·2H2O
Crystallization process should control degree of supersaturation, prevent fouling and produce absorbent parcel phenomenon.
The advantage that JX- heterophase reactors mainly have three aspects improves absorbing reaction speed：
A) increase air-liquid two-phase contact area, strengthen gas phase, liquid interphase mass transfer；
B) relative motion in forced fluid body, between liquid and solid, absorbent dissolution velocity and chemical reaction velocity are improved；
C) crystallization rate of gypsum is controlled.
The present embodiment uses wet type lime-gypsum method sulfur removal technology, and processing exhaust gas volumn presses 75000m3/ h operating mode exhaust gas volumns are set
Meter, design desulfurization degree are more than 98%, as shown in figure 1, wherein desulfurizer includes first grade absorption tower 1, two-level absorption tower 2, system
JX- is designed with stock tank 3, primary cycle pond 4, secondary cycle pond 5 and filter press 6, first grade absorption tower 1 and two-level absorption tower 2
Heterophase reactor, and gas vent and serum outlet, first order absorption are designed with respectively with bottom at the top of the tower body on two absorption towers
Tower 1 and two-level absorption tower 2 are adopted and are connected serially, and the heterophase reactor connection flue 7 of first grade absorption tower 1, are treated for receiving
The flue gas containing sulfur dioxide of processing, the heterophase reactor of two-level absorption tower 2 connect with the gas vent of first grade absorption tower 1, real
The desulfurization twice of existing gas, the gas vent of flue gas from two-level absorption tower 2 after the completion of desulfurization is arranged to be discharged to high-altitude chimney 8；
Be designed with primary cycle pond 4 and secondary cycle pond 5 spray pump (200E-M types spray pump (motor 90KW/ platforms), and
Primary cycle pond 4 and secondary cycle pond 5 all connect the multiphase in two-level absorption tower 2 and first grade absorption tower 1 respectively by shower 9
Reactor, and the serum outlet of first grade absorption tower 1 and two-level absorption tower 2 all by circulating slot 10 respectively with secondary cycle pond 5 and
Primary cycle pond 4 connects, and realizes the circulation desulfurization processing between two circulatory pools and two absorption towers；Slurrying pond 3 is used to add
Agstone and water prepare the lime white absorbent that concentration is 15%, and slurrying pond 3 is connected with primary cycle pond 4, primary cycle
Slurries in pond 4 are entered in secondary cycle pond 5 by overflow；In addition, secondary cycle pond 5 connects with filter press 6, secondary cycle pond
Slurries in 5 are delivered in filter press 6 by dehydration pump to be dehydrated to obtain desulfurated plaster, and the water taken off is delivered to the geosyncline that catchments
11, the geosyncline 11 that catchments connects with slurrying pond 3, for providing water for slurrying.
The bottom of towe of first grade absorption tower 1 and two-level absorption tower 2 is designed with gas-liquid separation cone bucket, realizes point of gas and slurries
From isolated gas and slurries are exported by gas vent and serum outlet respectively.First grade absorption tower 1, two-level absorption tower 2
And all it is equipped with Corrosion Protection of Fiber Reinforced Plastics layer in primary cycle pond 4 and secondary cycle pond 5.
Mixer is all additionally provided with primary cycle pond 4 and secondary cycle pond 5 and (installs 7.5KW's in primary cycle pond additional
Mixer, secondary cycle pond install two 11KW mixer additional), and aerator, aerator bag are provided with secondary cycle pond 5
Include JS250 Roots blowers (power of motor 55KW), gas main, four bronchuses and aeration tube, gas main and connect sieve respectively
Thatch air blower and four bronchuses, bronchus are erected on secondary cycle pond 5, and 11 are all offered on every bronchus and is gone out
Gas port, air is led to by the bottom of pond of secondary cycle pond 5 by aeration tube on each gas outlet.
As a result：Desulfuration efficiency >=99%, export SO2Concentration is less than 100mg/m3。
The method for carrying out desulfurization using the desulfurizer of the present embodiment, its step are as follows：
(1) agstone and water are proportionally added into slurrying pond 3, the lime slurry that concentration is 15% is made；
(2) slurries in primary cycle pond 4 are entered in secondary cycle pond 5 by overflow, treat that the slurries in primary cycle pond 4 are opened
When beginning overflow is entered in secondary cycle pond 5, spray pump and mixer in two circulatory pools are opened, while on first grade absorption tower 1
Flue 7 start to be passed through the waste gas containing sulfur dioxide, so as to proceed by desulfurization；
(3) gas and slurries after first grade absorption tower 1 is handled respectively enter two-level absorption tower 2 and secondary cycle pond 5, wherein
Gas continues the desulfurization in two-level absorption tower 2, and slurries are by shower 9 and circulating slot 10 in first grade absorption tower 1 and secondary cycle
Sulphur is inhaled in circulation between pond 5；Aerator is aerated in secondary cycle pond 5, the HSO for allowing sulfur dioxide therein to be formed3 -Fully quilt
It is oxidized to SO4 2-；
(4) gas and slurries after two-level absorption tower 2 is handled respectively enter high-altitude chimney 8 and primary cycle pond 4, wherein gas
Body is emptied through high-altitude chimney 8, and slurries are circulated by shower 9 and circulating slot 10 between two-level absorption tower 2 and primary cycle pond 4
Inhale sulphur；
(5) slurries in secondary cycle pond 5 are pumped into filter press 6 by dehydration pump is dehydrated, and is dehydrated through filter press 6
Desulfurated plaster is obtained, the water taken off enters water source of the geosyncline 11 as slurrying pond that catchment.
Therefore, in this method flue gas successively in the heterophase reactor of first grade absorption tower 1 and two-level absorption tower 2 with absorbent
Fully contact is absorbed, and the flue gas up to standard after desulfurization is discharged by chimney 8.Slurries finally flow after gas-liquid separator separates go out gas
Enter primary cycle pond 4, then be pumped into by spray in the heterophase reactor on absorption tower and carry out cyclic absorption SO2.Secondary cycle pond 5
In slurries pressure oxidation is carried out by aerator, the slurries after oxidation are pumped to filter press 6 and are dehydrated by dehydration, after dehydration
Desulfurated plaster is obtained, the water taken off uses for slurrying.
The flow that flue gas enters desulfurizer after transformation is 56800mg/m3, SO2For 13525mg/m3, by desulfurizer
Afterwards, the emission flow of chimney is 6898m3/ h, SO2For 39mg/m3, flue dust 73.1mg/m3, NOx(stationary source) 26.7mg/m3。
Table 1 is pollutant comparison diagram before and after transformation：
Table 1
| SO2(stationary source) | NOx(stationary source) | Flue dust | Flow (average value) | |
| Before transformation | More than 850 | 160.8 | 78.2 | 9800 |
| After transformation | 39 | 26.7 | 73.1 | 6898 |
| National standard | 400 | 240 | 100 | / |
The technical method of the present embodiment has that flow is short, refined lime consumption is few, energy consumption is low, refined lime strong applicability, subtracts
Excellent is arranged, is advantageous to environmental protection, there is good popularizing application prospect, desulfuration efficiency has reached 99%, the consumption of ton ore deposit
Refined lime is 350kg.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (8)
1. a kind of mine tailing smelts three wastes desulphurization system, it is characterised in that including desulfurization absorption plant, slurrying pond, primary cycle pond,
Secondary cycle pond and dehydration device, the desulfurization absorption plant include first grade absorption tower and two-level absorption tower, two absorption towers
Heterophase reactor is all set in tower body, and the tower body top on two absorption towers is designed with gas vent respectively with bottom and slurries go out
Mouthful, the heterophase reactor of first grade absorption tower connection flue, for receiving the pending flue gas containing sulfur dioxide, described two
The level heterophase reactor on absorption tower connects with the gas vent of first grade absorption tower, and the gas vent connection of the two-level absorption tower is high
Empty chimney；Spray pump is designed with the primary cycle pond and secondary cycle pond, and primary cycle pond and secondary cycle pond are all logical
Cross shower and connect heterophase reactor in two-level absorption tower and first grade absorption tower respectively, and first grade absorption tower and two-level absorption tower
Serum outlet be all connected respectively with secondary cycle pond and primary cycle pond by circulating slot, realize two circulatory pools and two suction
Receive the circulation desulfurization processing between tower；The slurrying pond is used to prepare absorbent, and slurrying pond is connected with the primary cycle pond,
Slurries in the primary cycle pond are entered in secondary cycle pond by overflow；In addition, the secondary cycle pond and dehydration device
Connection, dehydration device are used to be dehydrated to obtain desulfurated plaster by the slurries in secondary cycle pond, and the water taken off, which is delivered to, to catchment
Geosyncline.
2. mine tailing according to claim 1 smelts three wastes desulphurization system, it is characterised in that is provided with the secondary cycle pond
Aerator, the aerator include Roots blower, gas main, some bronchuses and aeration tube, the gas main point
Not Lian Jie Roots blower and bronchus, the bronchus is erected on the secondary cycle pond, and if being offered on bronchus
Gas port is done, the aeration tube upper end connects with bronchial gas outlet, and aeration tube lower end leads to secondary cycle pond bottom of pond.
3. mine tailing according to claim 1 smelts three wastes desulphurization system, it is characterised in that the first grade absorption tower and two level
The bottom of towe on absorption tower is designed with gas-liquid separation cone bucket, for realizing the separation of gas and slurries, isolated gas and slurries
Exported respectively by gas vent and serum outlet.
4. mine tailing according to claim 1 smelts three wastes desulphurization system, it is characterised in that the suction prepared in the slurrying pond
Receipts agent is the lime slurry that the concentration that agstone is mixed to get with water is 15%.
5. mine tailing according to claim 1 smelts three wastes desulphurization system, it is characterised in that the first grade absorption tower, two level
Corrosion Protection of Fiber Reinforced Plastics layer is all equipped with absorption tower and primary cycle pond and secondary cycle pond.
6. mine tailing according to claim 1 smelts three wastes desulphurization system, it is characterised in that the primary cycle pond and two level
Mixer is designed with circulatory pool.
7. mine tailing according to claim 1 smelts three wastes desulphurization system, it is characterised in that the dehydration device includes dehydration
Slurries in secondary cycle pond are pumped to filter press and are dehydrated to obtain desulfurated plaster, the collection by pump and filter press, the dehydration pump
Water geosyncline connects with slurrying pond, for providing water for slurrying.
8. the mine tailing according to claim any one of 1-7 smelts three wastes sulfur method, it is characterised in that including following step
Suddenly：
(1) agstone and water are proportionally added into slurrying pond, the lime slurry that concentration is 15% is made；
(2) slurries in primary cycle pond are entered in secondary cycle pond by overflow, treat that the slurries in primary cycle pond start overflow
During into secondary cycle pond, spray pump and mixer in two circulatory pools are opened, while the flue on first grade absorption tower is opened
Beginning is passed through the waste gas containing sulfur dioxide, proceeds by desulfurization；
(3) gas after first grade absorption tower processing and slurries respectively enter two-level absorption tower and secondary cycle pond, wherein gas after
Continue the desulfurization in two-level absorption tower, slurries circulate suction by shower and circulating slot between first grade absorption tower and secondary cycle pond
Sulphur；Aerator is aerated in secondary cycle pond, the HSO for allowing sulfur dioxide therein to be formed3 -Fully it is oxidized to SO4 2-；
(4) gas after two-level absorption tower processing and slurries respectively enter high-altitude chimney and primary cycle pond, and wherein gas is in height
Emptied in empty chimney, slurries are circulated by shower and circulating slot between two-level absorption tower and primary cycle pond inhales sulphur；
(5) slurries in secondary cycle pond enter in dehydration device and are dehydrated, and are dehydrated to obtain desulfurated plaster through filter press, take off
Water enter and catchment water source of the geosyncline as slurrying pond.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110102171A (en) * | 2019-04-26 | 2019-08-09 | 核工业北京化工冶金研究院 | A kind of lepidolite ore pretreatment device for absorbing tail gas and method |
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| CN208526295U (en) * | 2017-09-27 | 2019-02-22 | 湖南新龙矿业有限责任公司 | A kind of tailing smelting three wastes desulphurization system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0716424A (en) * | 1993-06-23 | 1995-01-20 | Mitsubishi Heavy Ind Ltd | Method and device for desulfurizing high concentration sulfur dioxide containing gas |
| JPH11347352A (en) * | 1998-06-08 | 1999-12-21 | Babcock Hitachi Kk | Wet exhaust desulfurizing method and apparatus |
| CN1280032A (en) * | 2000-07-17 | 2001-01-17 | 史汉祥 | Special device for processing so2 containing fume |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110102171A (en) * | 2019-04-26 | 2019-08-09 | 核工业北京化工冶金研究院 | A kind of lepidolite ore pretreatment device for absorbing tail gas and method |
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