CN207254065U - Low-pressure oxidized slurries system - Google Patents
Low-pressure oxidized slurries system Download PDFInfo
- Publication number
- CN207254065U CN207254065U CN201721199615.7U CN201721199615U CN207254065U CN 207254065 U CN207254065 U CN 207254065U CN 201721199615 U CN201721199615 U CN 201721199615U CN 207254065 U CN207254065 U CN 207254065U
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- Prior art keywords
- slurries
- oxidation
- air
- purifying column
- low
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- 239000002002 slurry Substances 0.000 title claims abstract description 220
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 200
- 230000003647 oxidation Effects 0.000 claims abstract description 192
- 239000007788 liquid Substances 0.000 claims abstract description 81
- 210000002966 serum Anatomy 0.000 claims abstract description 16
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 238000010992 reflux Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 6
- 238000012546 transfer Methods 0.000 abstract description 5
- 238000004140 cleaning Methods 0.000 abstract description 4
- 239000003245 coal Substances 0.000 abstract 1
- 239000003517 fume Substances 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 18
- 239000000203 mixture Substances 0.000 description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000011981 development test Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007613 slurry method Methods 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The utility model discloses a kind of low-pressure oxidized slurries system, it is mainly used for fire coal boiler fume cleaning project.Low-pressure oxidized slurries system includes serum recycle system, oxidation air feed system and slurries oxidation unit；The pipeline of conveying oxidation air does not enter in the slurry tank slurries in purifying column, and it is directly entered in slurries oxidation unit, slurries are met with oxidation air in the form of spraying, then it is sucked and flows into air and liquid mixer, the slurries after oxidation is passed back into purifying column in slurry tank with remaining oxidation air.The low-pressure oxidized slurries system of the utility model considerably reduces the resistance of slurries oxidative system, the power consumption of oxidation fan is greatly lowered, the efficient mass transfer field formed preferably by spiral-flow type gas-liquid mixer, reaches the effect that high efficiency aoxidizes slurries.Oxidation fan is done with centrifugal fan, simple system, considerably reduces engineering cost, and system operation is reliable, easy to operational management.
Description
Technical field
The utility model belongs to environmental protection technical field, more particularly to a kind of technological system of low-pressure oxidized slurries.
Background technology
Slurries oxidative system is a system critically important in gas cleaning engineering, its effect is to generate desulfurization in slurries
Sulfite oxidation into sulfate, it is concentrated after discharge system as byproduct recycling.It is domestic for the oxidation technology of slurries
Outer accepted practice is to be sent after with high-pressure oxidation wind turbine, air is boosted with pipeline into the oxidation air pipe network of slurries trench bottom,
Sprayed into by nozzle in slurries, slurries are aoxidized.It is this to be passed through what oxidation air aoxidized slurries in slurries trench bottom
Method we be known as oxidizing process under liquid.Since the oxidation air pipe net arrangement of oxidizing process under liquid is in the bottom of slurry tank, oxygen
The resistance of change air system is very big, and in order to overcome the resistance of system, oxidation air must have higher pressure, so can only select
Oxidation fan is done with high pressure roots blower or air compressor, the consequence brought is that amount of equipment power consumption is big, and high noise, need to set up
Oxidation fan workshop, investment is high, and system complex, adds operational management workload.In order to change this situation, by for many years
Development test and continuously improve, propose the utility model finally.
Utility model content
In view of this, there is provided a kind of low-pressure oxidized slurries system, it considerably reduces the resistance of slurries oxidative system, greatly
The power consumption of amplitude reduction oxidation fan, reaches the effect of high efficiency oxidation slurries, the simple system, considerably reduces engineering
Expense, system operation is reliable, easy to operational management.
The one side of the technical solution of the utility model provides a kind of low-pressure oxidized slurries system, it includes serum recycle system
System, oxidation air feed system and slurries oxidation unit；
The conveying oxidation air of the pipeline oxidization air supply system of the conveying oxidation air of oxidation air feed system
Pipeline does not connect the slurry tank in purifying column, and directly connects in the slurries oxidation unit；
Slurries equipped with sulphite are delivered into slurries oxygen by serum recycle system, including first device, first device
In makeup is put；
Oxidation air feedway, including second device, second device convey oxidation into the slurries oxidation unit
Air；
Slurries oxidation unit, including 3rd device, the slurries mix oxygen with the oxidation air in 3rd device
Change, then flow into purifying column.
Further, the slurries oxidation unit is arranged in outside purifying column and more than slurry tank liquid level.
Further, the 3rd device include spray system, gas-liquid mixing device, gas-liquid mixing device for centrifugal gas-
Liquid mixer, slurries are sprayed by spray system, and slurries are taken out after meeting with the oxidation air sent by oxidation air feed system
Inhale and flow into gas-liquid mixing device, in slurry tank of the slurry reflux after gas-liquid mixing device internal oxidition to purifying column.
Further, the first device includes slurries pump 5, slurries pipeline 6；The 3rd device includes spray system；
Slurry tank includes the slurries of sulphite by 5 suction of slurries pump, sends out through slurries pipeline 6, is sprayed by spray system, and by aoxidizing
The oxidation air that air supply system is sent meets and while enters in slurries oxidation unit, the slurries after oxidation and remaining oxygen
Change air and export discharge from slurries oxidation unit, flow into purifying column.
Further, the gas-liquid mixing device is spiral-flow type gas-liquid mixing device.
Further, the second device includes oxidation fan 1, oxidation air pipeline 2.
Further, the oxidation fan is centrifugal fan, and the oxidation air pipeline 2 connects spiral-flow type gas-liquid
Mixer entrance, gas-liquid mixer outlet connection mixed flow tube enter purifying column, are back in the slurry tank of purifying column, purifying column
Begin with the chimney for being discharged into air.
The oxidation fan is centrifugal fan, the oxidation air pipeline 2 by oxidation air be sent into spiral-flow type gas-
Liquid mixer aoxidizes slurries, and remaining oxidation air enters in purifying column through mixed flow tube, is back to the slurries of purifying column
In groove, remaining oxidation air is discharged into air with gas cleaning flow in purifying column through chimney.
The innovation of the preferable technical solution of the utility model and beneficial effect essentially consist in it is following some：
1st, a kind of technological system of low-pressure oxidized slurries has been founded
The utility model provides one kind and does oxidation fan with centrifugal fan, with spiral-flow type gas-liquid mixer institute shape
Into efficient mass transfer field created for slurries and oxidation air and be mixed condition well, the sulphite in slurries is aoxidized
Into the technological system of the low-pressure oxidized slurries of sulfate.The system (is pumped, slurries pipeline, nozzle by serum recycle system containing slurries
Deng), oxidation air feed system (containing oxidation fan, oxidation air pipeline etc.) and slurries oxidation unit (gas containing spiral-flow type-liquid
Mixer, mixed flow tube etc.) three parts composition.
After oxidation air and the slurries sprayed by nozzle enter spiral-flow type gas-liquid mixer at the same time, in efficient mass transfer field
Sulphite in slurries is oxidized to sulfate, and the slurries after oxidation are flowed into purifying column together with remaining oxidation air.
2nd, the oxidation of slurries carries out in spiral-flow type gas-liquid mixer, the height formed using spiral-flow type gas-liquid mixer
Effect mass transfer field enables slurries and oxidation air to come into full contact with and mix, and achievees the purpose that efficient oxidation slurries, is carried for slurries oxidation
A full technical strategies are supplied.
3rd, oxidizing process is a kind of method of brand-new oxidation slurries on liquid.Slurries in slurry tank by slurries pumped send to
In spiral-flow type gas-liquid mixer, during being mixed with oxidation air, the sulphite in slurries is by efficient oxidation
Into sulfate.We are known as oxygen on liquid using the gas-liquid mixer being located at outside slurry tank by this to aoxidize the method for slurries
Change method.
4th, make oxidation fan with centrifugal fan, achieveed the purpose that low-pressure oxidized slurries, due to oxidizing process on liquid
The resistance of oxidation air feed system is from the influence of liquid level of slurry in slurry tank, therefore the resistance of oxidation air feed system is very
Low, the pressure provided with centrifugal fan can meet the requirement for aoxidizing slurries completely, it is not necessary that select high pressure roots drum
Wind turbine or air compressor do oxidation fan.
The beneficial effects of the utility model are compared with prior art：
1st, the resistance of the oxidation air feed system of the utility model is low, can do oxidation fan with centrifugal fan.
It is made of for the resistance of oxidizing process under liquid (prior art) oxidation air feed system following items：P=P1+P2
+P3+P4。
In formula：P-oxidation air feed system drag overall；
P1-oxidation air the resistance of ducting；
Liquid level in P2-slurry tank, m；
Flue gas resistance in P3-purifying column；
P4-neat stress the resistance of ducting.
And the resistance of oxidizing process (the utility model) oxidation air feed system is made of following items on liquid：P=P1+P3
+P4.As can be seen here on liquid oxidizing process oxidation air feed system resistance from liquid level in slurry tank influence.
Judge now to be compared with specific drag parameter for the ease of analysis：
If oxidation air pipeline drag overall P1=500Pa, liquid level H=7m, resistance P2=68670Pa in slurry tank,
The resistance P3=1500Pa of flue gas in purifying column, neat stress resistance of ducting P4=500Pa.
Then the drag overall of oxidizing process (prior art) oxidation air feed system is P=71170Pa under liquid, and is aoxidized on liquid
The drag overall that method (the utility model) oxidation air is supplied to system is P=2500Pa, just corresponds to oxidizing process resistance under liquid
3.5%, when liquid level increase in slurry tank, which is also further reduced.Therefore for the utility model, centrifugation is selected
Formula ventilation blower is entirely capable of the requirement for meeting oxidation slurries, and for aoxidizing slurry method under liquid, high pressure roots can only be selected to rouse
Wind turbine or air compressor do oxidation fan.
2nd, the utility model considerably reduces the power consumption of oxidation fan, reduces running cost.
The power of oxidation fan motor is generally calculated as follows：
Nm=(K1 × P × Q)/η × K2 × 10-3Kw
In formula：Nm-oxidation fan adapted motor power (output)；
P-oxidation air feed system drag overall；
Q-oxidation air amount；
The efficiency of η-oxidation fan；
The safety coefficient of K1-system resistance；
The safety coefficient of K2-motor.
For in oxidizing process (prior art) above-mentioned formula under oxidizing process on liquid (the utility model) and liquid, except system is total
Resistance P is different outer, and other specification is all identical, it can be seen that the power consumption of oxidizing process oxidation fan just corresponds under liquid aoxidize on liquid
3.5% or so of method oxidation fan power consumption, energy-saving effect is notable, effectively reduces the running cost of system.
3rd, the utility model does oxidation fan with centrifugal fan, and not only equipment manufacturing cost is low, but also need not build oxidation
Wind turbine workshop, is not required to set maintenance crane, and corresponding noise countermeasure, cooling water system etc..Considerably reduce engineering cost.
4th, the low-pressure oxidized slurries technological system of the utility model is good with oxidation slurries effect, and simple system is (containing control
System) the characteristics of, the operational management for system of being more convenient for.
Brief description of the drawings
Fig. 1 is the structure diagram of one embodiment of the low-pressure oxidized slurries system of the utility model.
Wherein：
1st, oxidation fan；
2nd, oxidation air pipeline；
3rd, gas-liquid mixer；
4th, mixed flow tube；
5th, slurries pump；
6th, slurries pipeline；
7th, nozzle；
8th, former nozzle；
9th, demister；
10th, chimney；
11st, desulfurizing agent amounts to system；
12nd, magma liquid pump.
Embodiment
The feature and technology contents of the utility model can be further appreciated that for the ease of the relevant personnel of the art, it is existing
The embodiment of the utility model is discussed in detail with reference to Figure of description.
Embodiment 1：
Low-pressure oxidized slurries system mainly by oxidation fan 1, oxidation air pipeline 2, gas-liquid mixer 3, mixed flow tube 4,
The compositions such as slurries pump 5, slurries pipeline 6, nozzle 7.
After desulphurization system and slurry low-pressure oxidative system are all run, the SO2 in flue gas is inhaled by the desulfurizing agent in slurries
Midwifery is returned in slurry tank into sulphite, and with slurries.
Slurries pump 5 sucks the slurries in slurry tank, is sent out by slurries pipeline 6 and is sprayed by nozzle 7, simultaneous oxidation wind turbine
After outdoor air is aspirated through oxidation air pipeline 2 by 1 to be sent out, and the slurries sprayed before gas-liquid mixer with nozzle meet
Flow at the same time in centrifugal gas-liquid mixer, which creates the bar being mixed well for oxidation air and slurries
Part, in efficient mass transfer field, sulphite is oxidized to sulfate.Slurries and remaining oxidation air after oxidation are through mixed flow tube
4 enter in purifying column, and the slurries after oxidation are fallen into slurry tank.Remaining oxidation air is then mixed into flue gas, with the net of flue gas
Change flow and be discharged into air, achieveed the purpose that slurry low-pressure aoxidizes.
Embodiment 2：
Low-pressure oxidized slurries system includes serum recycle system, oxidation air feed system and slurries oxidation unit；Oxidation
The pipeline of the conveying oxidation air of air supply system does not enter in the slurry tank slurries in purifying column, and is directly entered the slurry
In liquid oxidation device；Slurries equipped with sulphite are delivered into slurry by serum recycle system, including first device, first device
In liquid oxidation device；Oxidation air feedway, including second device, second device are conveyed into the slurries oxidation unit
Oxidation air；Slurries oxidation unit, including 3rd device, the slurries mix oxygen with the oxidation air in 3rd device
Change, then flow into purifying column.Slurries oxidation unit is independently arranged.
Embodiment 3：
Low-pressure oxidized slurries system includes serum recycle system, oxidation air feed system and slurries oxidation unit；Oxidation
The pipeline of the conveying oxidation air of air supply system does not enter in the slurry tank slurries in purifying column, and is directly entered the slurry
In liquid oxidation device；Slurries equipped with sulphite are delivered into slurry by serum recycle system, including first device, first device
In liquid oxidation device；Oxidation air feedway, including second device, second device are conveyed into the slurries oxidation unit
Oxidation air；Slurries oxidation unit, including 3rd device, the slurries mix oxygen with the oxidation air in 3rd device
Change, then flow into purifying column, slurries oxidation unit is arranged in outside purifying column and more than slurry tank liquid level.
Embodiment 4：
Low-pressure oxidized slurries system includes serum recycle system, oxidation air feed system and slurries oxidation unit；Oxidation
The pipeline of the conveying oxidation air of air supply system does not enter in the slurry tank slurries in purifying column, and is directly entered the slurry
In liquid oxidation device；Slurries equipped with sulphite are delivered into slurry by serum recycle system, including first device, first device
In liquid oxidation device；Oxidation air feedway, including second device, second device are conveyed into the slurries oxidation unit
Oxidation air；Slurries oxidation unit, including 3rd device, the slurries mix oxygen with the oxidation air in 3rd device
Change, then flow into purifying column, slurries oxidation unit is arranged in outside purifying column and more than slurry tank liquid level.
3rd device includes spray system, gas-liquid mixing device, and gas-liquid mixing device is centrifugal gas-liquid mixing device, slurries
Sprayed by spray system, slurries are sucked after meeting with the oxidation air sent by oxidation air feed system and flow into solution-air
Mixer, in slurry tank of the slurry reflux to purifying column after gas-liquid mixing device internal oxidition.
Embodiment 5：
Low-pressure oxidized slurries system includes serum recycle system, oxidation air feed system and slurries oxidation unit；Oxidation
The pipeline of the conveying oxidation air of air supply system does not enter in the slurry tank slurries in purifying column, and is directly entered the slurry
In liquid oxidation device；Serum recycle system includes first device, and the slurries equipped with sulphite are delivered into slurry by first device
In liquid oxidation device；Oxidation air feedway includes second device, and second device is conveyed into the slurries oxidation unit
Oxidation air；Slurries oxidation unit includes 3rd device, and the slurries mix oxygen with the oxidation air in 3rd device
Change, then flow into purifying column, slurries oxidation unit is arranged in outside purifying column and more than slurry tank liquid level.
First device includes slurries pump 5, slurries pipeline 6；3rd device includes spray system；Slurry tank includes sulphite
Slurries by 5 suction of slurries pump, send out through slurries pipeline 6, sprayed by spray system, with being sent by oxidation air feed system
Oxidation air meets simultaneously while enters in slurries oxidation unit, and the slurries after oxidation are aoxidized from slurries with remaining oxidation air and filled
Outlet discharge is put, is flowed into purifying column.The gas-liquid mixing device is spiral-flow type gas-liquid mixing device.
Embodiment 6：
Low-pressure oxidized slurries system includes serum recycle system, oxidation air feed system and slurries oxidation unit；Oxidation
The pipeline of the conveying oxidation air of air supply system does not enter in the slurry tank slurries in purifying column, and is directly entered the slurry
In liquid oxidation device；Serum recycle system includes first device, and the slurries equipped with sulphite are delivered into slurry by first device
In liquid oxidation device；Oxidation air feedway includes second device, and second device is conveyed into the slurries oxidation unit
Oxidation air；Slurries oxidation unit includes 3rd device, and the slurries mix oxygen with the oxidation air in 3rd device
Change, then flow into purifying column, slurries oxidation unit is arranged in outside purifying column and more than slurry tank liquid level.
The second device includes oxidation fan 1, oxidation air pipeline 2；First device includes slurries pump 5, slurries pipeline
6；3rd device includes spray system；The slurries that slurry tank includes sulphite are sucked by slurries pump 5, are sent out through slurries pipeline 6,
Sprayed by spray system, such as sprayed by nozzle, the oxidation fan is centrifugal fan, and the oxidation air pipeline 2 will
Oxidation air is sent into spiral-flow type gas-liquid mixer and slurries is aoxidized, and remaining oxidation air enters purifying column through mixed flow tube
In, it is back in the slurry tank of purifying column, remaining oxidation air is discharged into air with gas cleaning flow in purifying column through chimney.
In a preferred embodiment, mixed flow tube 6 is opened in more than the slurry tank liquid level of purifying column, and slurries are from liquid level
Side is fallen into slurry tank.
It should be noted that above-described embodiment is only specific embodiment, in other examples, pump can be other
Suction conveyer is substituted, and spray system can have the similar sprinkling equipments such as nozzle, injector, the netted official website of point to substitute, and gas-
Liquid mixer is also only preferably spiral-flow type gas-liquid mixing device.
The above, the only embodiment of this case or the explanation to embodiment, the protection domain of this case
It is not limited thereto, any one skilled in the art can readily occur in change in the technical scope that this case discloses
Change or replace, should all cover within the protection domain of this case.The protection domain of this case should using scope of the claims as
It is accurate.
Claims (7)
- A kind of 1. low-pressure oxidized slurries system, it is characterised in thatIncluding serum recycle system, oxidation air feed system and slurries oxidation unit；The pipeline of the conveying oxidation air of oxidation air feed system does not connect the slurry tank in purifying column, and directly connects described In slurries oxidation unit；Slurries equipped with sulphite are delivered into slurries oxidation dress by serum recycle system, including first device, first device In putting；Oxidation air feedway, including second device, second device convey oxidation air into the slurries oxidation unit；Slurries oxidation unit, including 3rd device, the slurries and oxidation air mixed oxidization in 3rd device, then Flow into purifying column.
- A kind of 2. low-pressure oxidized slurries system according to claim 1, it is characterised in that the slurries oxidation unit arrangement Outside purifying column and more than slurry tank liquid level.
- 3. a kind of low-pressure oxidized slurries system according to claim 1, it is characterised in that the 3rd device includes spray System, gas-liquid mixing device, gas-liquid mixing device are centrifugal gas-liquid mixing device, and slurries are sprayed by spray system, slurries with by oxygen Change after the oxidation air that air supply system is sent meets and be sucked and flow into gas-liquid mixing device, in gas-liquid mixing device internal oxidition Slurry reflux afterwards is into the slurry tank of purifying column.
- A kind of 4. low-pressure oxidized slurries system according to claim 1, it is characterised in thatThe first device includes slurries pump (5), slurries pipeline (6)；The 3rd device includes spray system；The slurries that slurry tank includes sulphite pump (5) suction by slurries, send out through slurries pipeline (6), are sprayed by spray system, Oxidation air with being sent by oxidation air feed system meet and while into slurries oxidation unit, slurries after oxidation and Remaining oxidation air is exported from slurries oxidation unit and discharged, and is flowed into purifying column.
- 5. a kind of low-pressure oxidized slurries system according to claim 3, it is characterised in that the gas-liquid mixing device is rotation Streaming gas-liquid mixing device.
- 6. a kind of low-pressure oxidized slurries system according to claim 1, it is characterised in that the second device includes oxidation Wind turbine (1), oxidation air pipeline (2).
- 7. a kind of low-pressure oxidized slurries system according to claim 6, it is characterised in that the oxidation fan is centrifugal Ventilation blower, oxidation air pipeline (2) the connection spiral-flow type gas-liquid mixer entrance, gas-liquid mixer outlet connection mixed flow Pipe enters purifying column, is back in the slurry tank of purifying column, and purifying column begins with the chimney for being discharged into air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721199615.7U CN207254065U (en) | 2017-09-19 | 2017-09-19 | Low-pressure oxidized slurries system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721199615.7U CN207254065U (en) | 2017-09-19 | 2017-09-19 | Low-pressure oxidized slurries system |
Publications (1)
| Publication Number | Publication Date |
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| CN207254065U true CN207254065U (en) | 2018-04-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107684812A (en) * | 2017-09-19 | 2018-02-13 | 于维礼 | Oxidizing process in low-pressure oxidized slurries system and liquid |
-
2017
- 2017-09-19 CN CN201721199615.7U patent/CN207254065U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107684812A (en) * | 2017-09-19 | 2018-02-13 | 于维礼 | Oxidizing process in low-pressure oxidized slurries system and liquid |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180420 |