CN110040805A - A kind of degassing tower recycled for the decyanation of liquid containing cyanogen and valuables - Google Patents
A kind of degassing tower recycled for the decyanation of liquid containing cyanogen and valuables Download PDFInfo
- Publication number
- CN110040805A CN110040805A CN201910270211.XA CN201910270211A CN110040805A CN 110040805 A CN110040805 A CN 110040805A CN 201910270211 A CN201910270211 A CN 201910270211A CN 110040805 A CN110040805 A CN 110040805A
- Authority
- CN
- China
- Prior art keywords
- tower
- liquid
- valuables
- decyanation
- circular chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/18—Cyanides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a kind of degassing towers recycled for the decyanation of liquid containing cyanogen and valuables, it has the enclosure space surrounded by bottom plate, tower wall and tower top, tower top has exhaust outlet, exhaust outlet is communicated to absorption tower, and the enclosure space inside degassing tower is divided into solarization air cell and circular chamber by partition, and partition top is overflow port, the lower partition has circulation port, solarization air cell bottom is equipped with aerator, and inlet and liquid outlet are provided in the tower wall of circular chamber side, is equipped with paddle device in circular chamber.The device can realize the high efficiency removing of hydrogen cyanide in liquid containing cyanogen with lower cost, and be conducive to the recycling of valuables.
Description
Technical field
The invention belongs to nonferrous metallurgy and environmental protection technical fields, relate in particular to a kind of for the decyanation of liquid containing cyanogen
And the degassing tower of valuables recycling.
Background technique
In gold smelting, at this stage mainly using cyaniding.It is existing very long that cyaniding is applied to extraction of gold process
History, rate of recovery height, simple process, unit cost are low, thus in the world the smelting of most gold mines all using cyanogen
Change method.The cyanide for being commercially used for cyaniding Leaching of Gold is mainly potassium cyanide, Cymag, cyanogas and ammonium cyanide etc., is
The compound of severe toxicity.In the industrial production, a large amount of liquid is carried secretly in the tailing after cyanidation gold-extracted, and a large amount of cyanogen are contained in the liquid
Compound brings huge hidden danger to surrounding enviroment, and cyanide also has relatively high value.In addition, in cyaniding waste liquid also
There is the non-ferrous metal of high value containing copper, zinc, silver etc., there is very high recovery value.
In cyanide bearing waste solution the recycling of cyanide and valuable metal is contained currently largely using acidization with sulfuric acid adjusting
The pH value of cyanogen waste liquid is allowed in acidity, and cyanide is changed into HCN, since HCN vapour pressure is higher, when being filled with gas into waste liquid,
HCN will escape into gas phase from liquid phase and be entrained by the flow of air, and contact the gas for being loaded with HCN with NaOH solution, HCN is reacted with NaOH
NaCN is generated, leaching gold is reused for, the method for this processing cyanide bearing waste solution, which is referred to as, is acidified absorption method.
The application for being acidified absorption method is more than 60 years existing, and till now, used HCN stripping equipment is mainly filler
Tower.But existing packed tower stripping have the shortcomings that it is certain, first is that when concentration of cyanide is low processing cost be higher than recovery value, two
It is that the waste water obtained after stripping often contains cyanogen amount standard is not achieved, it is also necessary to which processing could discharge again, third is that cyanide bearing waste solution institute
The various substances contained cause packed tower to block, fourth is that will cause liquid flooding and vapour lock increase if gas liquid ratio is excessive in packed tower, increase
Add power consumption, economic benefit reduces.
Summary of the invention
In view of the status of prior art degassing tower, we devise a kind of degassing tower of novel structure, can use high
Gas liquid ratio, very high decyanation rate is reached under relatively reasonable cost.
Specifically, the present invention is using following technical scheme:
A kind of degassing tower recycled for the decyanation of liquid containing cyanogen and valuables, which is characterized in that the degassing tower have by bottom plate,
The enclosure space that tower wall and tower top surround, tower top have for the exhaust outlet containing hydrogen cyanide gas to be discharged, and the exhaust outlet passes through
Pipeline is communicated to absorption tower, and the enclosure space inside degassing tower is divided into two by partition, and the space of partition side is solarization air cell, separately
The space of side is circular chamber, and partition top is overflow port, and the lower partition has the circulation port of connection solarization air cell and circular chamber, is exposed
Gas chamber bottom is equipped with aerator, for being filled with high pressure gas to being aerated in indoor liquid, in the tower wall of circular chamber side
It is provided with inlet and liquid outlet, inlet is located at lower part, and liquid outlet is located at top and the position of liquid outlet and is lower than partition
The overflow port on top is equipped with paddle device in circular chamber, and paddle device has blade and axis, for promoting inlet to enter
The mixing of liquid and circulation indoor liquid.
Preferably, the bottom of circular chamber is lower than the bottom of solarization air cell, to form mud chamber in circular chamber lower part.It is more excellent
Choosing, product mouth is arranged in setting in the tower wall of mud chamber bottom.
Preferably, there is aperture on the blade of paddle device.
Additionally preferably, paddle device is mounted on circular chamber by the support device being arranged in partition or circular chamber tower wall
In.
In a preferred approach, the air inlet of aerator is connected to the exhaust outlet on absorption tower.
Preferably, partition is provided with heating device.It is further preferred that the heating device is steam heat exchanger.
Degassing tower of the invention has novel structure, this kind of new structural degassing tower will not generate blocking, can adopt
With high gas liquid ratio, Cavitation effect, decyanation significant effect are made full use of.For containing the cyanogen-containing tailing of higher valuables content
For, valuables can be recycled in degassing tower, treatment process after the recovery is easy, and has recycled valuables and taken off
The liquid of cyanogen is also more preferably handled, and for treatment measures, can reduce technology difficulty, and reduce processing cost.
Detailed description of the invention
Fig. 1 is the general structure schematic diagram of degassing tower of the present invention；
Fig. 2 is the top view of paddle device in circular chamber.
In figure: 1, bottom plate；2, tower wall；3, tower top；4, partition；5, solarization air cell；6, circular chamber；7, mud chamber；8, feed liquor
Mouthful；9, liquid outlet；10, exhaust outlet；11, overflow port；12, circulation port；13, product mouth is arranged；14, aerator；15, paddle device；
16, solarization air cell's liquid level；17, circular chamber liquid level；18, deposit；19, jet chimney；20, blade；21, axis；22, ring body.
Specific embodiment
Below in conjunction with attached drawing, the present invention is described in further detail.
Main device of the degassing tower as acidization decyanation, existing degassing tower mainly use the form of packed tower, work
Make efficiency is influenced by many factors, such as metal ions in waste liquor content, acid adding amount, packing density, stripping temperature, gas liquid ratio
Deng.For packed tower, increasing the factor that stripping efficiency first has to consider is thickness of liquid film, and thickness of liquid film and packing ring
Density, the selection of size are related.Improve hydrogen cyanide removal rate is to improve gas liquid ratio, then the raising meeting of gas liquid ratio on one side
Because the increase of vapour lock causes power consumption to be significantly increased, to reduce whole economic benefit.In addition metal ions in waste liquor content
Number can also have an impact the working efficiency of packed tower, and high ion concentration is easy to block packed tower, but precipitates before stripping
So that integral device construction cost increases, and the toxic hazard of operator is also significantly increased.Equal etc. original above
Cause becomes difficult the stripping efficiency for improving existing packed tower heavy.
In view of the status of the prior art, the present invention has developed a kind of new structural degassing tower.Referring to Fig. 1, show
The overall structure of degassing tower of the present invention.
The degassing tower recycled for the decyanation of liquid containing cyanogen and valuables of the invention has by bottom plate 1, tower wall 2 and tower top 3
The enclosure space surrounded, wherein tower top has for the exhaust outlet 10 containing hydrogen cyanide gas to be discharged, and the exhaust outlet passes through pipeline
It is communicated to absorption tower.Liquid containing cyanogen after acidification is admitted to degassing tower, to high pressure gas is blasted in liquid containing cyanogen as carrier gas, carries
Bubble is formed when gas passes through liquid containing cyanogen and takes away carrier gas of the formation of the hydrogen cyanide in liquid containing hydrogen cyanide, passes through 10 row of exhaust outlet
Out, the hydrogen cyanide gas that contains of discharge is pipelined to absorption tower, recovery of cyanide, and residual gas preferably returns degassing tower
It is recycled as carrier gas.
Enclosure space inside degassing tower of the present invention is divided into two by partition 4, and the space of partition side is solarization air cell 5, separately
The space of side is circular chamber 6, and partition top is overflow port 11, and the lower partition has the circulation port of connection solarization air cell and circular chamber
12.Solarization air cell bottom is equipped with aerator 14, for being filled with high pressure gas into the indoor liquid of aeration, is preferably to carry out self-priming
Receive the discharge gas of tower.It is provided with inlet 8 and liquid outlet 9 in the tower wall of circular chamber side, inlet is located at lower part, and liquid outlet
Positioned at top and the position of liquid outlet is lower than the overflow port on partition top.Liquid inside degassing tower apparatus of the invention has
The advantages of circulating degasification, acidified cyanide bearing waste solution enter in tower from inlet, remove hydrogen cyanide by aeration in solarization air cell,
Circular chamber is flowed into from overflow port, is overflowed from liquid outlet, realizes the removing of hydrogen cyanide.By the principle as it can be seen that the device of the invention
The form of packed tower one-way flow is changed, does not use filler in tower, high gas liquid ratio can be used, do not blocked in tower, liquid
Stream is not influenced by blocking, and removal efficiency is greatly improved, and power consumption is controlled.
It is further preferred that the bottom of circular chamber is lower than the bottom of solarization air cell, to form mud chamber in circular chamber lower part
7, in this mud chamber than more gentle, the insoluble matter in acidizing waste fluid can precipitate liquid stream herein, form deposit in bottom,
It is discharged outside tower by the row's product mouth 13 being located in the tower wall of mud chamber bottom, carries out the recycling of valuable metal.Since of the invention takes off
Gas tower uses the design of circulating fluid, will not generate blocking, into the waste liquid in tower without precipitating in advance.It can be carried out in tower
Partly precipitated separation, is also beneficial to the processing of discharge liquid, and the reduction for disposed of in its entirety facility construction cost provides possibility.Row
Sediment out passes through filters pressing, drying, obtains filter cake, and the liquid isolated is liquid containing cyanogen, is incorporated to outgassing routine.
From inlet enter acidification cyanide bearing waste solution with from overflow port overflow to the aeration in circular chamber after waste liquid recycling
It is mixed in room.But in fact, two kinds of liquid are in circular chamber it is possible that separation, the concentration containing cyanogen that inlet enters are higher
Waste liquid along tower wall be distributed, and overflow port enter aeration after waste liquid along partition be distributed.For promote two kinds of liquid mixing, preferably
Paddle device 15 is installed in circular chamber.Referring to fig. 2, paddle device has blade 20 and axis 21, and blade is pacified by ring body 22
It is attached on axis 21, is provided with support device on partition or circular chamber tower wall, paddle device is so as to being mounted in circular chamber.Blade
The blade of device has inclination angle, can slowly rotate in circular chamber under the action of water flow, promotes the mixed of circulation indoor liquid
It closes.In another preferred embodiment, the blade of paddle device is not complete blade, but has aperture on blade, is increased
The formation of sinuous flow in circular chamber, promotes the mixing of liquid.
The stripping effect of hydrogen cyanide depends on the diffusion of gas, improves the vapour pressure that stripping temperature improves hydrogen cyanide, more
It is easy to escape into gas phase from liquid phase.In addition improving temperature can reduce the viscosity of waste liquid, improves hydrogen cyanide and passes through liquefied gas
Interface expands the speed to gas phase.Therefore preferably, heating device is installed to be advantageous in degassing tower.As installation
The preferred embodiment of heating device, heating device are mounted in partition.It is further preferred that the heating device is steam heat exchanger.Such as
Shown in Fig. 1, jet chimney is installed in partition, so that steam heat exchanger is integrally formed in partition, it can be by adjusting steam
Throughput adjusts the temperature of waste liquid.
Degassing tower of the present invention can use high gas liquid ratio, the i.e. volume ratio of gas and liquid, for example, at least 300-
1000 gas liquid ratio or even 1000 or more.The exhaust gas being discharged from absorption tower exhaust outlet is pressed by high-pressure pump by aerator
Solarization air cell overflows in circular chamber by the waste liquid being sufficiently aerated from overflow port, and the liquid on upper layer is discharged to tower by liquid outlet
It is further processed outside, the liquid of lower layer is then mixed with the acidizing waste fluid entered by inlet.High gas liquid ratio can be brought more
Fast liquid stream circulation rate, liquid are adequately removed in tower by adequately circulation, the hydrogen cyanide included.If going out
Liquid mouth detects that cyanide content beyond preassigned, then can be further improved gas liquid ratio, reduces the waste liquid that inlet enters
Amount, until the waste liquid of liquid outlet discharge is met the requirements.Paddle device rotates under the action of liquid stream, and direction of rotation makes liquid stream exist
It is to flow downward in circular chamber, the cyanide bearing waste solution that the degassing liquid stream and lower section for having separated upper layer enter avoids cyanide bearing waste solution from following
The liquid stream that deaerates is discharged from liquid outlet.And in paddle device in lower half portion, with the rotation of paddle device, then the shape in circular chamber
At sinuous flow, promote the mixing between cyanide bearing waste solution and decyanation waste liquid.By the principle as it can be seen that degassing tower of the invention can be adapted for
The wider array of cyanide bearing waste solution of concentration range containing cyanogen.For the relatively high waste liquid of concentration containing cyanogen, mixed in circular chamber with decyanation liquid stream
It can be lowered into the amount containing cyanogen of the liquid stream of solarization air cell, by increasing aeration quantity, improve circulation rate and cycle-index, Ke Yigan
Pure land removes hydrogen cyanide contained therein.And the waste liquid less for amount containing cyanogen, then aeration quantity can be reduced, and then reduce function
Consumption, realizes relatively good business efficiency.
Embodiments of the present invention are described in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode, technical field those of ordinary skill within the scope of knowledge, present inventive concept can also not departed from
Under the premise of make a variety of changes.
Claims (8)
1. a kind of degassing tower recycled for the decyanation of liquid containing cyanogen and valuables, which is characterized in that the degassing tower has the bottom of by
The enclosure space that plate, tower wall and tower top surround, tower top have for the exhaust outlet containing hydrogen cyanide gas to be discharged, and the exhaust outlet is logical
Piping is communicated to absorption tower, and the enclosure space inside degassing tower is divided into two by partition, and the space of partition side is solarization air cell,
The space of the other side is circular chamber, and partition top is overflow port, and the lower partition has the circulation port of connection solarization air cell and circular chamber,
Solarization air cell bottom is equipped with aerator, for being filled with high pressure gas, the tower wall of circular chamber side into the indoor liquid of aeration
On be provided with inlet and liquid outlet, inlet is located at lower part, and liquid outlet be located at top and liquid outlet position be lower than every
The overflow port on plate top is equipped with paddle device in circular chamber, and paddle device has blade and axis, for promoting inlet to enter
Liquid and circulation indoor liquid mixing.
2. the degassing tower recycled as described in claim 1 for the decyanation of liquid containing cyanogen and valuables, which is characterized in that circular chamber
Bottom be lower than solarization air cell bottom, thus circular chamber lower part formed mud chamber.
3. the degassing tower recycled as claimed in claim 2 for the decyanation of liquid containing cyanogen and valuables, which is characterized in that precipitating
Product mouth is arranged in setting in the tower wall of room bottom.
4. the degassing tower recycled as described in claim 1 for the decyanation of liquid containing cyanogen and valuables, which is characterized in that blade dress
There is aperture on the blade set.
5. the degassing tower recycled as described in claim 1 for the decyanation of liquid containing cyanogen and valuables, which is characterized in that blade dress
It sets and is mounted in circular chamber by the support device being arranged in partition or circular chamber tower wall.
6. the degassing tower recycled as described in claim 1 for the decyanation of liquid containing cyanogen and valuables, which is characterized in that aeration dress
The air inlet set is connected to the exhaust outlet on absorption tower.
7. the degassing tower recycled as described in claim 1 for the decyanation of liquid containing cyanogen and valuables, which is characterized in that in partition
Equipped with heating device.
8. the degassing tower recycled as claimed in claim 7 for the decyanation of liquid containing cyanogen and valuables, which is characterized in that described to add
Hot charging is set to steam heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910270211.XA CN110040805B (en) | 2019-04-04 | 2019-04-04 | Degassing tower for decyanation of cyanogen-containing liquid and recovery of valuable substances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910270211.XA CN110040805B (en) | 2019-04-04 | 2019-04-04 | Degassing tower for decyanation of cyanogen-containing liquid and recovery of valuable substances |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110040805A true CN110040805A (en) | 2019-07-23 |
| CN110040805B CN110040805B (en) | 2021-07-16 |
Family
ID=67276277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910270211.XA Expired - Fee Related CN110040805B (en) | 2019-04-04 | 2019-04-04 | Degassing tower for decyanation of cyanogen-containing liquid and recovery of valuable substances |
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| Country | Link |
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| CN (1) | CN110040805B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105600927A (en) * | 2015-12-30 | 2016-05-25 | 江苏艾特克环境工程设计研究院有限公司 | Wastewater simultaneous nitrification and denitrification denitrifying method and device |
| CN106241749A (en) * | 2016-08-30 | 2016-12-21 | 安徽金禾实业股份有限公司 | Blow-off method produces the method for high-purity sulphuric acid |
| CN106474773A (en) * | 2015-09-01 | 2017-03-08 | 斗山重工业株式会社 | Degasser |
| CN108557937A (en) * | 2018-07-05 | 2018-09-21 | 山东省城市供排水水质监测中心 | A kind of combined vanes structure stripping filler |
| CN208356652U (en) * | 2018-05-03 | 2019-01-11 | 湖州卓豪丝绸有限公司 | A kind of textile dyestuff mixing arrangement |
-
2019
- 2019-04-04 CN CN201910270211.XA patent/CN110040805B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106474773A (en) * | 2015-09-01 | 2017-03-08 | 斗山重工业株式会社 | Degasser |
| CN105600927A (en) * | 2015-12-30 | 2016-05-25 | 江苏艾特克环境工程设计研究院有限公司 | Wastewater simultaneous nitrification and denitrification denitrifying method and device |
| CN106241749A (en) * | 2016-08-30 | 2016-12-21 | 安徽金禾实业股份有限公司 | Blow-off method produces the method for high-purity sulphuric acid |
| CN208356652U (en) * | 2018-05-03 | 2019-01-11 | 湖州卓豪丝绸有限公司 | A kind of textile dyestuff mixing arrangement |
| CN108557937A (en) * | 2018-07-05 | 2018-09-21 | 山东省城市供排水水质监测中心 | A kind of combined vanes structure stripping filler |
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| Publication number | Publication date |
|---|---|
| CN110040805B (en) | 2021-07-16 |
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Granted publication date: 20210716 |