CN208145683U - A kind of flue gas of heating furnace desulfurization dust-removal system - Google Patents
A kind of flue gas of heating furnace desulfurization dust-removal system Download PDFInfo
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- CN208145683U CN208145683U CN201820209145.6U CN201820209145U CN208145683U CN 208145683 U CN208145683 U CN 208145683U CN 201820209145 U CN201820209145 U CN 201820209145U CN 208145683 U CN208145683 U CN 208145683U
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Abstract
The utility model belongs to environmental technology field, more particularly to a kind of flue gas of heating furnace desulfurization dust-removal system, including numb stone temperature-reducing tower, process water pond, desulfurizing tower and lye pond, numb stone temperature-reducing tower is connected to furnace outlet flue, numb stone is equipped with spraying layer in cooling tower, the connection of process water pond spraying layer, desulfurizing tower is connected to numb stone temperature-reducing tower, flue gas demister and water flushing component are installed in desulfurizing tower, flue gas demister is connected to process water pond, desulfurizing tower spraying layer is connected to lye pond, lower part in desulfurizing tower offers desulfurizing tower drain trench, the side in lye pond is equipped with alkali liquid tank, the other side in lye pond offers waste water outlet mouth.The utility model can adapt to the high-temperature flue gas operating condition of furnace outlet, realize flue gas desulfurization and dedusting；Occupied area is small, and desulfurization dust-removing efficiency is high, and later period waste water directly can outlet；Up-front investment cost is reduced, operation energy consumption is reduced；It is easy to operate, it can be achieved that full-automatic operation.
Description
Technical field
The utility model belongs to environmental technology field more particularly to a kind of flue gas of heating furnace desulfurization dust-removal system.
Background technique
In recent years, the concern with country to air quality proposes quite stringent pollutant for power industry and arranges
Limit value is put, especially for the limited region of environmental carrying capacity, such as Jiangsu Province, Zhejiang Province, Shandong Province, has put into effect phase to Hebei province
Pass policy, it is desirable that coal-burning power plant refers to gas turbine group pollutant emission standard limit value, i.e., under the conditions of benchmark oxygen content 6%,
Flue dust, SO2, NOx emission concentration are respectively no higher than 5mg/m3,35mg/m3,50mg/m3.Corresponding country has put into effect about heating
Furnace and industrial furnace smoke pollutant emission standard, some places standard are even directly consistent with power plant emission standard；At present
Power industry sulfur removal technology mainly uses Limestone-gypsum Wet Flue Gas Desulfurization Process；This technique is mainly tried out in there are air preheater or province in front
Temperature can be reduced to 200 DEG C hereinafter, heating furnace is such as used for the heating furnace of steel rolling by coal device, and fuel is after furnace chamber inner combustion
Flue gas is equipped with heat exchange cooling system, flue-gas temperature can be in 750 DEG C to 300 DEG C sections for heating steel after furnace.In high temperature
Under operating condition, if on the one hand flue gas can generate corrosion to carbon steel tower and erosion resistant coating and destroy, another aspect high temperature into carbon steel tower
Flue gas, which enters absorption tower, to reduce high temperature, be easy scald people.NaOH/Na2CO3 is a kind of safe and efficient absorbent, and
It is low compared with the cost of Limestone-gypsum Wet Flue Gas Desulfurization Process to invest a set of sodium alkali system cost.It develops and is suitable for heating furnace high-temperature cigarette
Desulfurization dust removal process technique seems very necessary, and constantly improves the only way which must be passed of environmental aspect.
Increasingly stringent with environmental protection standard, the pollutant discharge amount of steel industry heating furnace has been unable to meet environmental protection and wants
It asks；Heating furnace smoke temperature is high, if not plus the cooling systems such as heat exchanger, the unbearable high-temperature flue gas in absorption tower, to absorption tower anti-corrosion and
It absorbs tower wall to have an impact, the cooling measure needed；Limestone-gypsum Wet Flue Gas Desulfurization Process construction cost is higher；Desulfurization product is such as
Where reason；Most of system is the newly-built or desulfurizing fly ash in same court, to be simplified to desulfurization site requirements.
Therefore, a kind of new flue gas of heating furnace desulfurization dust-removal system is developed, not only there is urgent researching value, it may have good
Good economic benefit and commercial application potentiality, this is exactly where the power that the utility model is accomplished and basis.
Utility model content
In order to overcome the defect of the prior art as indicated above, the present inventor has made intensive studies this, is paying
After a large amount of creative works, so as to complete the utility model.
Specifically, technical problem to be solved in the utility model is：A kind of flue gas of heating furnace desulfurization and dedusting system is provided
System carries out cooling, desulfurizing processing to high-temperature flue gas, at the same will treated that product focuses on, reduce processing cost and
Occupied area is saved, while can absorb and trap a variety of flue gas pollutants.
In order to solve the above technical problems, the technical solution of the utility model is：
A kind of flue gas of heating furnace desulfurization dust-removal system, including numb stone temperature-reducing tower, process water pond, desulfurizing tower and lye pond,
The fiber crops stone temperature-reducing tower is connected to furnace outlet flue, and the fiber crops stone is equipped with spraying layer, the process water pond in cooling tower
It is connect by temperature drop pipe with the spraying layer of the numb stone temperature-reducing tower, passes through increasing between the desulfurizing tower and the numb stone temperature-reducing tower
Pressure fan is connected to, and is equipped with flue gas demister and desulfurizing tower spraying layer in the desulfurizing tower, the flue gas demister is installed on institute
State the lower section of desulfurizing tower spraying layer, the flue gas demister is connected to the process water pond, the desulfurizing tower spraying layer with it is described
Lye pond is connected to, and the lower part in the desulfurizing tower offers the desulfurizing tower drain trench being connected to the lye pond, the lye
The side in pond is equipped with alkali liquid tank, and the other side in the lye pond offers waste water outlet mouth.
In the present invention, as an improvement technical solution, process water cooling is installed on the process water pond
Pump is equipped with numb stone drain trench between the fiber crops stone temperature-reducing tower and the process water pond.
As an improvement technical solution, in the furnace outlet flue and the air inlet of the booster fan is equal
Baffle door is installed；The bending tubes end of the fiber crops stone temperature-reducing tower and smoke end are mounted on pressure transmitter, the booster fan machine
Thermometer is installed at mouthful.
As an improvement technical solution, the desulfurization inner wall of tower serves as a contrast resin flake, and the flue gas demister is board-like
Flue gas demister, the desulfurizing tower spraying layer are rotary wind type turbulent bed.
As an improvement technical solution, be equipped between the desulfurizing tower spraying layer and the lye pond lye circulation
Pump and Siphon pot.
As an improvement technical solution, the lye Chi Chu is equipped with oxidation fan, the oxidation fan with it is described
Lye pond is coupled, and is equipped with blender inside the alkali liquid tank.
As an improvement technical solution, whole system entrance and chimney breast add on-line monitoring system, alkali
Liquid pool adds water quality monitoring instrument.
After above-mentioned technical proposal, the utility model has the beneficial effects that：
Numb stone temperature-reducing tower is connected to furnace outlet flue, and numb stone is equipped with spraying layer in cooling tower, and process water pond passes through
Temperature drop pipe is connect with the spraying layer of numb stone temperature-reducing tower, is connected between desulfurizing tower and numb stone temperature-reducing tower by booster fan, desulfurization
Flue gas demister and desulfurizing tower spraying layer are installed, flue gas demister is installed on the top of desulfurizing tower spraying layer, and flue gas removes in tower
Day with fog is connected to process water pond, and desulfurizing tower spraying layer is connected to lye pond, and the lower part in desulfurizing tower is offered to be connected to lye pond
Desulfurizing tower drain trench, the side in lye pond is equipped with alkali liquid tank, and the other side in lye pond offers waste water outlet mouth, this reality
Enter the position of desulphurization system in reheat furnace system when in use with novel, numb stone temperature-reducing tower corrosion-resistant high-temperature cools down in numb stone
Spraying layer is added inside tower, is cooled down with process water；After the hot fume come from heating furnace enters numb stone temperature-reducing tower, pass through adjusting
The temperature of high-temperature flue gas is dropped to ideal state of temperature by the water of process water, leads to desulfurizing tower by booster fan；High temperature cigarette
Gas makes process water transient evaporation at water vapour during passing through numb stone temperature-reducing tower, and numb stone forms water mist in cooling tower, and capture is big
The dust of amount, reaches dust removing effects；It simultaneously also can be by the SO2 of flue gas, partial removal；The flue gas temperature come out from numb stone temperature-reducing tower
Degree is reduced to suitable temperature hereinafter, by booster fan, is introduced into desulfurizing tower, with the alkaline reaction in desulfurizing tower, removing is fallen
SO2 in flue gas, reaches desulfuration efficiency；Flue gas enters back into the flue gas demister on absorption tower top upwards and desulfurizing tower spraying layer reaches
To the effect of dedusting；Finally it is discharged from absorption tower chimney breast；Alkali liquor storage tank stirs and is added process water, adjusts PH to suitable model
It in enclosing, is added in lye pond, desulfurizing tower spraying layer, which is squeezed into desulfurizing tower, to be reacted, then is discharged by absorb the bottom of the tower, is returned
It is flow to lye pond, by the SO2 in flue gas, removal, by increasing numb stone temperature-reducing tower, in such a way that process water cools down, by high temperature
Flue gas cool-down is to suitable temperature hereinafter, can reach the range that absorption tower anti-corrosion is born, the process water of cooling is back to work
It is recycled in skill water tank.If adding flue gas heat-exchange unit, price is higher, and numb stone temperature-reducing tower technique water spray, on the one hand reduces
Into absorption tower temperature, a part of flue dust and SO2 on the other hand can be removed；Lye pond adjusts desulfurization by control pH value
Efficiency, desulfurization product NaHSO3 can be discharged to Sewage Disposal by way of positive displacement pump outlet, and the technical program relatively passes
The Limestone-gypsum Wet Flue Gas Desulfurization Process system of system, reduces lime stone pulping system, and gypsum dehydration system saves occupied area,
The cost of construction greatly reduces, and on the basis of removing SO2 again can by the pollutant of other in flue gas such as SO3,
HCL, HF and dirt are all absorbed and are trapped.
Process water cooling pump is installed, numb stone drain is installed between numb stone temperature-reducing tower and process water pond on process water pond
Ditch, when the utility model is used, process water cooling pump can effectively cool down to the flue gas of numb stone in cooling tower, numb stone
Water after cooling can be recycled to flow in process pool and is recycled by drain trench, reduce the waste of water resource, be reduced
Cost.
In furnace outlet flue and the air inlet of booster fan is mounted on baffle door；The bending tubes end of numb stone temperature-reducing tower
It is mounted on pressure transmitter with smoke end, thermometer is installed at booster fan machine mouth, when the utility model is used, baffle
Door can control the discharge and entrance of flue gas, avoid the incomplete of fume treatment, and pressure transmitter can be checked into numb stone drop
Pressure change before and after warm tower, to understand the pressure difference transformation for entering numb stone temperature-reducing tower, booster fan is arranged after numb stone temperature-reducing tower
It is thermometer to be installed, record enters the flue gas temperature of blower before fans entrance because numb stone temperature-reducing tower is preferably run under negative pressure state
Degree, the temperature that blower will be entered when operation adjust temperature to suitable desulfurizing tower.
NaOH solution circulating pump and Siphon pot are installed between desulfurizing tower spraying layer and lye pond, when the utility model is used,
NaOH solution circulating pump squeezes into lye in absorption tower and smoke reaction, adjusted by way of adjusting pH value and flow liquid-gas ratio from
And to adjust desulfuration efficiency.
Lye Chi Chu is equipped with oxidation fan, and oxidation fan is coupled with desulfurizing tower drain trench, peace inside alkali liquid tank
Equipped with blender, when the utility model is used, the HSO3- in lye pond is oxidized to SO42- by oxidation fan, alkali liquid tank
Blender can accelerate the dissolution of alkali formula article.
In conclusion the utility model can adapt to the high-temperature flue gas operating condition of furnace outlet, flue gas desulfurization is realized
Dedusting；Realize smoke SO 2,95% or more dust treatment efficiency；System does not need traditional powder cabin, limestone slurry liquid case, belt
Dewaterer, the equipment such as gypsum cyclone, occupied area is small, and desulfurization dust-removing efficiency is high, and later period waste water directly can outlet；Reduce early period
Cost of investment reduces operation energy consumption；It is easy to operate, it can be achieved that full-automatic operation.
Detailed description of the invention
Fig. 1 is the process system flow diagram of the utility model；
Fig. 2 is the process flow floor map of Fig. 1；
In figure：
1, furnace outlet flue；2, furnace outlet baffle board door of flue；3 numb stone temperature-reducing towers；4, numb stone temperature-reducing tower outlet
Flue；5, baffle door is entered the wind；6, booster fan；7, flue gas demister；8, desulfurizing tower；9, numb stone drain trench；10, process water
Pond；11, process water cooling pump；12, mist eliminator flushing water pump；13, desulfurizing tower drain trench；14, lye pond；15, lye recycles
Pump；16, Siphon pot；17 oxidation fans；18, alkali liquid tank；19, waste water outlet mouth.
Specific embodiment
Below with reference to specific embodiment, the present invention will be further described.But the purposes of these exemplary embodiments
Only it is used to enumerate the utility model with purpose, any type of any limit not is constituted to the real protection scope of the utility model
It is fixed, it is more non-that the protection scope of the utility model is confined to this.
As depicted in figs. 1 and 2, a kind of flue gas of heating furnace desulfurization dust-removal system, including numb stone temperature-reducing tower 3, process water pond 10,
Desulfurizing tower 8 and lye pond 14, the fiber crops stone temperature-reducing tower 3 are connected to furnace outlet flue 1, peace in the fiber crops stone temperature-reducing tower 3
Equipped with spraying layer, the process water pond 10 is connect by temperature drop pipe with the spraying layer of the numb stone temperature-reducing tower 3, the desulfurizing tower
It is connected between 8 and the numb stone temperature-reducing tower 3 by booster fan 6, flue gas demister 7 and desulfurization is installed in the desulfurizing tower 8
Tower spraying layer, the flue gas demister 7 are installed on the lower section of the desulfurizing tower spraying layer, the flue gas demister 7 and the work
Mist eliminator flushing water pump 12 is installed, the desulfurizing tower spraying layer and the lye pond 14 connect on the pipeline that skill pond 10 is connected to
Logical, the lower part in the desulfurizing tower 8 offers the desulfurizing tower drain trench 13 being connected to the lye pond 14, the lye pond 14
Side alkali liquid tank 18 is installed, the other side in the lye pond 14 offers waste water outlet mouth.
Wherein enter the position of desulphurization system, numb 3 corrosion-resistant high-temperature of stone temperature-reducing tower, in numb stone temperature-reducing tower in reheat furnace system
Spraying layer is added inside 3, is cooled down with process water；After the hot fume come from heating furnace enters numb stone temperature-reducing tower 3, pass through adjusting
The temperature of high-temperature flue gas is dropped to ideal state of temperature by the water of process water, leads to desulfurizing tower 8 by booster fan 6；High temperature
Flue gas makes process water transient evaporation at water vapour during passing through numb stone temperature-reducing tower 3, numb stone temperature-reducing tower 3 is interior to form water mist, catches
A large amount of dust is obtained, dust removing effects are reached；It simultaneously also can be by the SO2 of flue gas, partial removal；The cigarette come out from numb stone temperature-reducing tower 3
Temperature degree is reduced to suitable temperature hereinafter, by booster fan 6, is introduced into desulfurizing tower 8, anti-with the lye in desulfurizing tower 8
It answers, the SO2 in flue gas is fallen in removing, reaches desulfuration efficiency；Flue gas enters back into flue gas demister 7 and the desulfurization on absorption tower top upwards
Tower spraying layer achievees the effect that dedusting；Finally it is discharged from absorption tower chimney breast；Alkali liquor storage tank stirs and is added process water, adjusts
It in PH to OK range, is added in lye pond, desulfurizing tower spraying layer, which is squeezed into desulfurizing tower 8, to be reacted, then by absorption tower
Bottom discharge, is back to lye pond 14, and the SO2 in flue gas is removed, and by increasing numb stone temperature-reducing tower 3, is cooled down by process water
Mode, by cooling high-temperature fume to suitable temperature hereinafter, the range that absorption tower anti-corrosion is born can be reached, cooling
Process water is back in technique water tank and recycles.If adding flue gas heat-exchange unit, price is higher, and numb 3 process water of stone temperature-reducing tower
Spray, is on the one hand lowered into absorption tower temperature, on the other hand can remove a part of flue dust and SO2；Lye pond 14 passes through control
PH value and flow processed adjust liquid-gas ratio to which come the efficiency that adjusts desulfurization, desulfurization product NaHSO3 can pass through positive displacement pump
The mode of outlet, is discharged to Sewage Disposal.The more traditional Limestone-gypsum Wet Flue Gas Desulfurization Process system of the technical program, reduces stone
Lime stone pulping system, gypsum dehydration system save occupied area, the cost of construction greatly reduce, and in removing SO2
On the basis of again can the pollutant of other in flue gas such as SO3, HCL, HF and dirt be absorbed and be trapped.
Process water cooling pump 11 is installed on process water pond 10, fiber crops are installed between numb stone temperature-reducing tower 3 and process water pond 10
Stone drain trench 9, process water cooling pump 11 can make process water cool down, can carry out to the flue gas in numb stone temperature-reducing tower 3
Water after cooling can be recycled to flow in process pool and is recycled by effective cooling, numb stone drain trench 9, reduce water
The waste of resource, reduces costs.
Furnace outlet baffle board door of flue 2 is installed, the air inlet of booster fan is equipped in furnace outlet flue 1
Enter the wind baffle door 5；Numb stone temperature-reducing tower inlet flue duct and numb stone temperature-reducing tower exhaust pass 4 are mounted on pressure transmitter, are pressurized wind
Thermometer is installed, baffle door can control the discharge and entrance of flue gas, avoid the incomplete of fume treatment, press at 6 machine mouth of machine
Power transmitter can be checked into the pressure change of numb 3 front and back of stone temperature-reducing tower, be become with the pressure difference that understanding enters numb stone temperature-reducing tower 3
It changes, it is because numb stone temperature-reducing tower 3 is preferably run under negative pressure state, before fans entrance that booster fan 6, which is arranged after numb stone temperature-reducing tower 3,
Thermometer is installed, record enters the flue-gas temperature of blower, and the temperature that blower will be entered when operation adjusts temperature to suitable desulfurizing tower 8
Degree.
Wall liner resin flake in desulfurizing tower 8, flue gas demister 7 are board-like flue gas demister 7, and desulfurizing tower spraying layer is rotor
Formula turbulent bed.
NaOH solution circulating pump 15 and Siphon pot 16 are installed, NaOH solution circulating pump 15 will between desulfurizing tower spraying layer and lye pond 14
Lye is squeezed into absorption tower and smoke reaction, adjusts desulfuration efficiency by way of adjusting liquid-gas ratio.
Lye Chi14Chu is equipped with oxidation fan 17, and oxidation fan 17 is coupled with 8 drain trench of desulfurizing tower, alkali liquid tank
Blender is installed, the HSO3- in lye pond 14 is oxidized to SO42-, the blender of alkali liquid tank 18 by oxidation fan 17 inside 18
It can accelerate the dissolution of alkali formula article, the pH value in conditioning tank.
System flue entrance and chimney breast add CEMS on-line monitoring system, and lye pond 14 adds water quality monitoring instrument,
CEMS on-line monitoring system, real-time monitoring desulphurization system import and export the dirt of flue gas, the content of SO2；Lye pond 14 adds water quality prison
Instrument is surveyed, the parameters such as COD, BOD, pH value, salt content can be monitored；CEMS on-line monitoring system is existing monitoring system,
Measuring instrument is existing monitoring device, is not repeated herein.
The high-temperature flue gas that heating furnace generates enters in numb stone temperature-reducing tower 3, by adjusting the water of process water for high-temperature flue gas
Temperature drop to ideal state of temperature, desulfurizing tower 8 is led to by air-introduced machine.High-temperature flue gas passes through the process of numb stone temperature-reducing tower 3
In make process water transient evaporation at water vapour, form water mist in numb stone temperature-reducing tower 3, capture a large amount of dust, reach dust removing effects；
Part SO2 in flue gas can also be removed simultaneously；From numb stone temperature-reducing tower 3 come out flue-gas temperature be reduced to suitable temperature hereinafter,
It by air-introduced machine, is introduced into desulfurizing tower 8, with the alkaline reaction in desulfurizing tower 8, the SO2 in flue gas is fallen in removing, reaches desulfurization effect
Rate；Flue gas enters back into the rotary wind type turbulent bed on 8 top of desulfurizing tower upwards and board-like demister achievees the effect that dedusting；Finally from de-
The discharge of 8 chimney breast of sulphur tower；The lye or ground caustic shipped outside factory is added into alkali liquor storage tank, stirs and be added process water, adjusts
It saves in PH to OK range, is added in lye pond, is squeezed into desulfurizing tower 8 and reacted by circulating pump, then by desulfurizing tower
The discharge of 8 bottoms, is back to lye pond 14, is aoxidized by oxidation fan 17, and by the HSO3- complete oxidation in pond, desulfurization wastewater is logical
It crosses waste water discharge opening 19 and drains into Sewage Disposal outside periodically.
It should be appreciated that the purposes of these embodiments is merely to illustrate the utility model and is not intended to limitation the utility model
Protection scope.In addition, it should also be understood that, those skilled in the art can be right after having read the technology contents of the utility model
The utility model makees various change, modification and/or variation, all these equivalent forms equally fall within right appended by the application and want
Seek book within the limits of the protection.
Claims (6)
1. a kind of flue gas of heating furnace desulfurization dust-removal system, it is characterised in that：Including numb stone temperature-reducing tower, process water pond, desulfurizing tower with
And lye pond, the fiber crops stone temperature-reducing tower are connected to furnace outlet flue, the fiber crops stone is equipped with spraying layer in cooling tower, described
Process water pond connect by temperature drop pipe with the spraying layer of the numb stone temperature-reducing tower, the desulfurizing tower and the fiber crops stone temperature-reducing tower it
Between be connected to by booster fan, flue gas demister and desulfurizing tower spraying layer, the flue gas demister are installed in the desulfurizing tower
It is installed on the top of the desulfurizing tower spraying layer, the flue gas demister is connected to the process water pond, the desulfurizing tower spray
Layer is connected to the lye pond, and the lower part in the desulfurizing tower offers the desulfurizing tower drain trench being connected to the lye pond,
The side in the lye pond is equipped with alkali liquid tank, and the other side in the lye pond offers waste water outlet mouth.
2. a kind of flue gas of heating furnace desulfurization dust-removal system as described in claim 1, it is characterised in that：Pacify on the process water pond
Cool down equipped with process water and pump, numb stone drain trench is installed between the fiber crops stone temperature-reducing tower and the process water pond.
3. a kind of flue gas of heating furnace desulfurization dust-removal system as described in claim 1, it is characterised in that：The furnace outlet cigarette
In road and the air inlet of the booster fan is mounted on baffle door；The bending tubes end of the fiber crops stone temperature-reducing tower and smoke end are pacified
Equipped with pressure transmitter, thermometer is installed at the booster fan machine mouth.
4. a kind of flue gas of heating furnace desulfurization dust-removal system as described in claim 1, it is characterised in that：The desulfurization inner wall of tower lining
Resin flake, the flue gas demister are board-like flue gas demister, and the desulfurizing tower spraying layer is rotary wind type turbulent bed.
5. a kind of flue gas of heating furnace desulfurization dust-removal system as described in claim 1, it is characterised in that：The desulfurizing tower spraying layer
NaOH solution circulating pump and Siphon pot are installed between the lye pond.
6. a kind of flue gas of heating furnace desulfurization dust-removal system as described in claim 1, it is characterised in that：The lye Chi Chu installation
There is oxidation fan, the oxidation fan is coupled with the desulfurizing tower drain trench, and stirring is equipped with inside the alkali liquid tank
Device.
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| CN201820209145.6U CN208145683U (en) | 2018-02-06 | 2018-02-06 | A kind of flue gas of heating furnace desulfurization dust-removal system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109569247A (en) * | 2018-12-28 | 2019-04-05 | 江苏乾宏能源科技有限公司 | High-efficiency multi-stage wet type emulsifies desulphurization system |
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2018
- 2018-02-06 CN CN201820209145.6U patent/CN208145683U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109569247A (en) * | 2018-12-28 | 2019-04-05 | 江苏乾宏能源科技有限公司 | High-efficiency multi-stage wet type emulsifies desulphurization system |
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