CN208526295U - A kind of tailing smelting three wastes desulphurization system - Google Patents
A kind of tailing smelting three wastes desulphurization system Download PDFInfo
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- CN208526295U CN208526295U CN201721254587.4U CN201721254587U CN208526295U CN 208526295 U CN208526295 U CN 208526295U CN 201721254587 U CN201721254587 U CN 201721254587U CN 208526295 U CN208526295 U CN 208526295U
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Abstract
The utility model relates to industrial waste gas technical field of desulfurization, particularly relate to a kind of tailing smelting three wastes desulphurization system, it includes desulfurization absorption plant, slurrying pond, primary cycle pond, secondary cycle pond and dehydration device, utilize two concatenated adsorption towers, cooperate the milk of lime of 15% concentration circulation absorption sulfur dioxide gas in heterophase reactor, the sulfur dioxide of absorption forms HSO3 ‑And sufficiently it is oxidized to SO42‑, it is absorbed the sulfur dioxide in flue gas sufficiently, the utility model refined lime consumption is few, low energy consumption, refined lime strong applicability, and emission reduction effect is splendid, is conducive to environmental protection, has good popularization and application foreground, and desulfuration efficiency is up to 99%.
Description
Technical field
The utility model relates to industrial waste gas technical field of desulfurization, particularly relate to a kind of tailing smelting three wastes desulphurization system.
Background technique
Desulfurizing tower in the prior art is to use circulation form in tower body slurries, is easy to produce scale formation inside tower body,
Cause tower body inner wall space to gradually become smaller, runs obstructed, it is often necessary to clear up tower body inner wall.Since desulfurizing tower is using tower body
Circulation form in slurries absorbs SO2The HSO of formation3 -The problems such as tower inner sealing environment cannot be aoxidized adequately.In addition,
The desulfuration efficiency of the prior art is low, and discharge standard is not achieved in tail gas.
Utility model content
In view of this, technical problem to be solved in the utility model, exactly proposes that a kind of tailing smelts three wastes desulfurization system
System.
In order to solve the above technical problems, the utility model is achieved using following technical scheme:
A kind of tailing smelting 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 is designed with gas vent and serum outlet respectively with lower part at the top of the tower body on two absorption towers, it is described
The heterophase reactor of first grade absorption tower connects flue, and for receiving the flue gas to be processed containing sulfur dioxide, the second level absorbs
The heterophase reactor of tower is connected to the gas vent of first grade absorption tower, and the gas vent of the two-level absorption tower connects smoke aloft
Chimney；Spray pump is designed in the primary cycle pond and secondary cycle pond, and primary cycle pond and secondary cycle pond all pass through spray
Shower pipe is separately connected the heterophase reactor in two-level absorption tower and first grade absorption tower, and the slurry of first grade absorption tower and two-level absorption tower
Liquid outlet is all connect with secondary cycle pond and primary cycle pond by circulating slot respectively, realizes two circulatory pools and two absorption towers
Between circulation desulfurization processing；The slurrying pond is used to prepare absorbent, and slurrying pond is connect 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 is connected to dehydration device,
For dehydration device for being dehydrated to obtain desulfurized gypsum by the slurries in secondary cycle pond, the water taken off is delivered to the geosyncline that catchments.
Preferably, it is equipped with aerator in the secondary cycle pond, the aerator includes Roots blower, total
Tracheae, several bronchuses and aeration tube, the gas main are separately connected Roots blower and bronchus, and the bronchus is set up
On the secondary cycle pond, and several 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 tower bottom of the first grade absorption tower and two-level absorption tower is designed with gas-liquid separation cone bucket, for real
The separation of existing gas and slurries, isolated gas and slurries pass through gas vent and serum outlet output respectively.
Preferably, the absorbent prepared in the slurrying pond is that the concentration that agstone and water are mixed to get is 15%
Lime slurry.
Preferably, it is all spread in the first grade absorption tower, two-level absorption tower and primary cycle pond and secondary cycle pond
Equipped with Corrosion Protection of Fiber Reinforced Plastics layer.
Preferably, blender is designed in the primary cycle pond and secondary cycle pond.
Preferably, the dehydration device includes dehydration pump and filter press, and the dehydration pump will be in secondary cycle pond
Slurries are pumped to filter press and are dehydrated to obtain desulfurized gypsum, and the geosyncline that catchments is connected to slurrying pond, for providing water for slurrying.
The operating procedure of the utility model is as follows:
(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, and the slurries to primary cycle pond start
When overflow is entered in secondary cycle pond, the spray pump and blender in two circulatory pools, while the cigarette on first grade absorption tower are opened
Road starts to be passed through the exhaust gas containing sulfur dioxide, starts to carry out desulfurization；
(3) first grade absorption tower treated gas 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 between first grade absorption tower and secondary cycle pond by spray tube and circulating slot
Ring inhales sulphur；Aerator is aerated in secondary cycle pond, the HSO for allowing sulfur dioxide therein to be formed3 -Sufficiently it is oxidized to
SO42-；
(4) two-level absorption tower treated gas and slurries respectively enter high-altitude chimney and primary cycle pond, wherein gas
It is emptied in the chimney of high-altitude, slurries are recycled between two-level absorption tower and primary cycle pond by spray tube and circulating slot inhales sulphur；
(5) slurries in secondary cycle pond, which enter in dehydration device, is dehydrated, and is dehydrated to obtain desulfurized gypsum through filter press,
The water taken off enters water source of the geosyncline as slurrying pond that catchment.
Compared with prior art, after the utility model has the beneficial effect that the desulphurization system desulfurization of the utility model,
Content of sulfur dioxide is 100mg/m in obtained gas3, it is much smaller than<industrial furnace atmosphere pollutants emission standards>(GB9078-
1996) secondary standard standard value: 400mg/m3, desulfuration efficiency be greater than 99%, greatly reduce and sulfur dioxide be discharged into air
Amount, in addition, the utility model agstone consumption is small.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model desulfurizer.
Specific embodiment
The utility model is got information about to allow those skilled in the art to be more clear, below in conjunction with attached drawing, and with
For the Chen Zhouti industry Co., Ltd of Xinshao, the desulfurization effect of the utility model 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 for entering antimony sulfonium, then generate
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 reactor (separately has milk of lime to prepare workshop, Tail water reuse that sulfur dioxide, which administers main device,
System) processing after empty, tail gas concentration after actual measurement concentration be 850mg/m3More than, be no longer satisfied national emission standard.[<
Industrial furnace atmosphere pollutants emission standards > (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 runing time has had reached design period, rotten
It loses more serious.Since 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 reactor, which is absorbed using air-liquid cocurrent, point of the liquid in inside reactor
Under the action of liquid, air guide, it is dispersed into multilayer liquid film, 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, the mass transfer between air-liquid is strengthened.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, to improve reaction speed.Since JX- heterophase reactor internal structure is identical, inhaled using gas and liquid flowing mode
It receives, it can stable operation using different absorbents.In the process of running, use lime for absorbent.
The reaction speed of calcium-base absorbing agent desulfurization depends on four rate controlling steps, i.e. SO2It absorbs, HSO3 -Oxidation is inhaled
Receive the crystallization of agent dissolution and gypsum:
1、SO2It absorbs
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 value is 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 absorption can pass 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.
3, the dissolution of absorbent
Absorbent 5 steps of dissolution point carry out:
a)H+、SO4 2-(external diffusion) is spread to absorbent surface
b)H+、SO4 2-It is inwardly spread from absorbent surface (interior diffusion)
c)H+、SO4 2-Chemical reaction (Control of chemical reaction) occurs with absorbent
d)Ca2+、CaSO4(interior diffusion) is diffused to the surface inside absorbent
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, to accelerate in the dissolution of absorbent and on its surface, the internal chemical reaction occurred.Reduce and absorbs
The partial size of agent can increase the specific surface area of absorbent, reduce the interior resistance spread.
4, the crystallization of gypsum
Ca2++SO4 2-+2H2O→CaSO4·2H2O
Crystallization process should control degree of supersaturation, prevent fouling and generate absorbent package phenomenon.
Mainly there are three the advantages of aspect to improve absorbing reaction speed for JX- heterophase reactor:
A) increase gas and liquid two phases contact area, strengthen gas phase, liquid interphase mass transfer；
B) relative motion in forced fluid body, between liquid and solid improves absorbent solution rate and chemical reaction velocity；
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 condition exhaust gas volumn is set
Meter, design desulfurization degree are 98% or more, as shown in Figure 1, wherein desulfurizer includes first grade absorption tower 1, two-level absorption tower 2, system
JX- is designed in 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 it is designed with gas vent and serum outlet, first order absorption respectively with lower part 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 of first grade absorption tower 1 connects flue 7, for receive to
The flue gas containing sulfur dioxide of processing, the heterophase reactor of two-level absorption tower 2 are connected to the gas vent of first grade absorption tower 1, real
The desulfurization twice of existing gas, the flue gas after the completion of desulfurization, which is arranged from the gas vent of two-level absorption tower 2 to high-altitude chimney 8, to be discharged；
Be designed in primary cycle pond 4 and secondary cycle pond 5 spray pump (200E-M type spray pump (motor 90KW/ platform), and
Primary cycle pond 4 and secondary cycle pond 5 are all separately connected the multiphase in two-level absorption tower 2 and first grade absorption tower 1 by spray tube 9
Reactor, and the serum outlet of first grade absorption tower 1 and two-level absorption tower 2 all pass through 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 for being added
The lime white absorbent that agstone and water preparation concentration are 15%, and slurrying pond 3 is connect 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 is connected to filter press 6, secondary cycle pond
Slurries in 5 are delivered to by dehydration pump to be dehydrated to obtain desulfurized gypsum in filter press 6, and the water taken off is delivered to the geosyncline that catchments
11, the geosyncline 11 that catchments is connected to slurrying pond 3, for providing water for slurrying.
The tower bottom 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 pass through gas vent and serum outlet output respectively.First grade absorption tower 1, two-level absorption tower 2
And Corrosion Protection of Fiber Reinforced Plastics layer is all equipped in primary cycle pond 4 and secondary cycle pond 5.
It is all additionally provided with blender in primary cycle pond 4 and secondary cycle pond 5 and (installs a 7.5KW's in primary cycle pond additional
Blender, secondary cycle pond install the blender of two 11KW additional), and aerator, aerator packet are equipped in secondary cycle pond 5
It includes JS250 Roots blower (power of motor 55KW), gas main, four bronchuses and aeration tube, gas main and is separately connected sieve
Thatch air blower and four bronchuses, bronchus are erected on secondary cycle pond 5, and are all offered 11 on every bronchus and gone out
Air is led to 5 bottom of pond of secondary cycle pond by aeration tube on each gas outlet by port.
As a result: desulfuration efficiency >=99% exports SO2Concentration is less than 100mg/m3。
The operating procedure for carrying out desulfurization using the desulfurizer of the present embodiment is 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, and the slurries to primary cycle pond 4 are opened
When beginning overflow is entered in secondary cycle pond 5, the spray pump and blender in two circulatory pools are opened, while on first grade absorption tower 1
Flue 7 start to be passed through the exhaust gas containing sulfur dioxide, thus start carry out desulfurization；
(3) treated the gas of first grade absorption tower 1 and slurries 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 spray tube 9 and circulating slot 10 in first grade absorption tower 1 and secondary cycle
Circulation inhales sulphur between pond 5；Aerator is aerated in secondary cycle pond 5, the HSO for allowing sulfur dioxide therein to be formed3 -Sufficiently quilt
It is oxidized to SO42-；
(4) treated the gas of two-level absorption tower 2 and slurries respectively enter high-altitude chimney 8 and primary cycle pond 4, wherein gas
Body is emptied through high-altitude chimney 8, and slurries are recycled between two-level absorption tower 2 and primary cycle pond 4 by spray tube 9 and circulating slot 10
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
Desulfurized gypsum is obtained, the water taken off enters water source of the geosyncline 11 as slurrying pond that catchment.
Therefore, wherein flue gas is successively abundant with absorbent in the heterophase reactor of first grade absorption tower 1 and two-level absorption tower 2
Contact absorbs, and the flue gas up to standard after desulfurization is discharged by chimney 8.Slurries finally flow into one after gas-liquid separator separates go out gas
Grade circulatory pool 4, then progress cyclic absorption SO in the heterophase reactor on absorption tower is pumped by spray2.In secondary cycle pond 5
Slurries carry out pressure oxidation by aerator, and the slurries after oxidation are pumped to the dehydration of filter press 6 by dehydration, obtain after dehydration
Desulfurized gypsum, the water taken off are used for slurrying.
It is 56800mg/m that flue gas, which enters the flow of desulfurizer, after transformation3, 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 transformation front and back pollutant comparison diagram:
Table 1
| SO2(stationary source) | NOx(stationary source) | Flue dust | Flow (average value) | |
| Before transformation | 850 or more | 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 have process is short, refined lime consumption is few, low energy consumption, refined lime strong applicability, subtract
Excellent is arranged, environmental protection is conducive to, there is good popularization and application foreground, desulfuration efficiency has reached 99%, the consumption of ton mine
Refined lime is 350kg.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (7)
1. a kind of tailing smelts three wastes desulphurization system, which is characterized 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 lower part and slurries go out
Mouthful, the heterophase reactor of the first grade absorption tower connects flue, for receiving the flue gas to be processed containing sulfur dioxide, described two
The heterophase reactor on grade absorption tower is connected to the gas vent of first grade absorption tower, and the gas vent of the two-level absorption tower connects high
Empty chimney；Spray pump is designed in the primary cycle pond and secondary cycle pond, and primary cycle pond and secondary cycle pond are all logical
Cross the heterophase reactor that spray tube is separately connected in two-level absorption tower and first grade absorption tower, and first grade absorption tower and two-level absorption tower
Serum outlet all pass through circulating slot and connect respectively with secondary cycle pond and primary cycle pond, realize two circulatory pools and two suctions
Receive the circulation desulfurization processing between tower；The slurrying pond is used to prepare absorbent, and slurrying pond is connect 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, for being dehydrated to obtain desulfurized gypsum by the slurries in secondary cycle pond, the water taken off is delivered to catchment dehydration device
Geosyncline.
2. tailing according to claim 1 smelts three wastes desulphurization system, which is characterized in that be equipped in the secondary cycle pond
Aerator, the aerator include Roots blower, gas main, several 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 offering on bronchus
Port is done, the aeration tube upper end is connected to bronchial gas outlet, and aeration tube lower end leads to secondary cycle pond bottom of pond.
3. tailing according to claim 1 smelts three wastes desulphurization system, which is characterized in that the first grade absorption tower and second level
The tower bottom on absorption tower is designed with gas-liquid separation cone bucket, for realizing the separation of gas and slurries, isolated gas and slurries
It is exported respectively by gas vent and serum outlet.
4. tailing according to claim 1 smelts three wastes desulphurization system, which is characterized in that the suction prepared in the slurrying pond
Receipts agent is the lime slurry that the concentration that agstone and water are mixed to get is 15%.
5. tailing according to claim 1 smelts three wastes desulphurization system, which is characterized in that the first grade absorption tower, second level
Corrosion Protection of Fiber Reinforced Plastics layer is all equipped in absorption tower and primary cycle pond and secondary cycle pond.
6. tailing according to claim 1 smelts three wastes desulphurization system, which is characterized in that the primary cycle pond and second level
Blender is designed in circulatory pool.
7. tailing according to claim 1 smelts three wastes desulphurization system, which is characterized in that the dehydration device includes dehydration
Slurries in secondary cycle pond are pumped to filter press and are dehydrated to obtain desulfurized gypsum, the collection by pump and filter press, the dehydration pump
Water geosyncline is connected to slurrying pond, for providing water for slurrying.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107569998A (en) * | 2017-09-27 | 2018-01-12 | 湖南新龙矿业有限责任公司 | A kind of mine tailing smelts three wastes desulphurization system and method |
| CN111001290A (en) * | 2019-12-25 | 2020-04-14 | 广东新生环保科技股份有限公司 | Lime slurry preparation and linkage slurry adding system |
-
2017
- 2017-09-27 CN CN201721254587.4U patent/CN208526295U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107569998A (en) * | 2017-09-27 | 2018-01-12 | 湖南新龙矿业有限责任公司 | A kind of mine tailing smelts three wastes desulphurization system and method |
| CN111001290A (en) * | 2019-12-25 | 2020-04-14 | 广东新生环保科技股份有限公司 | Lime slurry preparation and linkage slurry adding system |
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