CN205391786U - Hydrogen fluoride recovery processing device of electrolysis system fluorine negative pole tail gas - Google Patents
Hydrogen fluoride recovery processing device of electrolysis system fluorine negative pole tail gas Download PDFInfo
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- CN205391786U CN205391786U CN201620141280.2U CN201620141280U CN205391786U CN 205391786 U CN205391786 U CN 205391786U CN 201620141280 U CN201620141280 U CN 201620141280U CN 205391786 U CN205391786 U CN 205391786U
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Abstract
The utility model discloses a hydrogen fluoride recovery processing device of electrolysis system fluorine negative pole tail gas, its characteristics are that the device is by the steady voltage unit, retrieve the unit, purification unit with burn the unit and form, the negative pole tail gas that the electrolysis trough produced is delivered to the steady voltage unit by the pipeline and is cushioned, negative pole tail gas after the steady voltage carries out the condensation and the recovery of hydrogen fluoride by retrieving the unit, purification unit is delivered to by the vortex fan to negative pole tail gas through retrieving hydrogen fluoride, it drenches the remaining hydrogen fluoride of absorption to follow annular spraying by alkali lye, negative pole tail gas after spraying the washing send and burns the unit and ignite the back high altitude and discharge. Compared with the prior art, the utility model it is simple to have treatment process, and resources recovery is rateed highly, and treatment cost is low, and the environmental pollution that has significantly reduced can be used to the raw materials of electrolysis system fluorine behind the hydrogen fluoride of recovery, very big improvement effective utilization of resource, be a hydrogen fluoride recovery treatment process who has very much the electrolysis system fluorine tail gas of industrial value.
Description
Technical field
This utility model relates to waste gas recovery processing technology field, specifically the fluohydric acid gas recycling and processing device of a kind of electrolysis fluorine cathode exhaust gas.
Background technology
The industrially prepared mainly electrolysis of fluorine monomer in fluoride work, nuclear chemical industry, the molten mixture that electrolyte is potassium bifluoride and anhydrous HF is configured to, logical unidirectional current is electrochemically reacted in a cell, and anode produces F2, negative electrode produces H2.The boiling point of HF is 19.2 DEG C, and electrolytic tank electrolysis temperature causes HF to volatilize much larger than HF boiling point, and therefore electric tank cathode produces H2While carry a certain amount of HF secretly, formed containing H2Cathode exhaust gas (wherein hydrogen accounts for volume 94%, and fluohydric acid gas accounts for volume 6%) with HF.Cathode exhaust gas has deep-etching, inflammable and explosive characteristic, and direct discharge easily causes explosion accident, and the HF in tail gas can cause the problems such as equipment corrosion, environmental pollution.At present, the domestic waste gas that electrolysis fluorine is produced mainly adopts recirculated water to absorb hydrogen manufacturing fluoric acid or directly alkali liquor absorption is except the processing mode of HF, and the cathode exhaust gas that electrolysis fluorine produces processes and also needs to solve that pipe-line equipment anticorrosion, hydrogen is explosion-proof simultaneously, the problem such as qualified discharge after high concentration HF purification.
Prior art there is the problem that in cathode exhaust gas, HF is without recycling, and qualified discharge after direct purification process, it is the significant wastage to the resources of production, the cathode exhaust gas that electrolysis fluorine produces only has H2With two kinds of materials of HF, especially fluohydric acid gas separation and recovery after reusable edible in the raw material as electrolysis fluorine.
Utility model content
The purpose of this utility model is the fluohydric acid gas recycling and processing device of a kind of electrolysis fluorine cathode exhaust gas designed for the deficiencies in the prior art, deep condensation is adopted to be reclaimed by the fluohydric acid gas post liquefaction in electrolysis fluorine tail gas, the ignition after alkali liquor absorption purifies of gas after deep condensation, carry out high altitude discharge, the raw material of electrolysis fluorine is can be used for after the fluohydric acid gas reclaimed, greatly improve effective utilization of resource, decrease environmental pollution, processing cost is low, HF organic efficiency reaches 67%, HF purification efficiency reaches 99.9%, it it is the fluohydric acid gas recovery processing technique of a kind of electrolysis fluorine tail gas having very much industrial value.
The purpose of this utility model is achieved in that the fluohydric acid gas recycling and processing device of a kind of electrolysis fluorine cathode exhaust gas, it is characterized in that this device is by voltage regulation unit, recovery unit, clean unit and burning unit composition, the cathode exhaust gas that electrolysis bath produces is delivered to voltage regulation unit by pipeline and is cushioned, cathode exhaust gas after voltage stabilizing is carried out hydrofluoric condensation and recovery by recovery unit, recovered hydrofluoric cathode exhaust gas is delivered to clean unit by vortex fan, it is circulated the remaining fluohydric acid gas of spray-absorption by alkali liquor, cathode exhaust gas after spray washing send and burns high altitude discharge after unit is lighted a fire.
Described voltage regulation unit is the surge tank being provided with pressure transmitter.
Described recovery unit is made up of first-class heat exchanger, secondary heat exchanger, fridge and fluohydric acid gas storage tank, and the condensed fluid of first-class heat exchanger and secondary heat exchanger enters fluohydric acid gas storage tank；Described fridge is connected into and out of pipe with secondary heat exchanger tube side；Being connected with the inlet pipe of surge tank outlet, secondary heat exchanger shell side respectively into and out of pipe of described first-class heat exchanger shell side；The pipe that goes out of described secondary heat exchanger shell side is connected with the inlet pipe of first-class heat exchanger tube side.
Described clean unit is made up of three grades of heat exchangers, hot water storgae, heat-exchanger pump, alkali liquor absorption tower, vortex fan, lye tank (vat) and NaOH solution circulating pump, described three grades of heat exchanger tube pass into and out of pipe respectively with first-class heat exchanger tube side go out pipe and vortex fan import be connected；Being connected with heat-exchanger pump outlet and hot water storgae water inlet pipe respectively into and out of pipe of described three grades of heat exchanger shell pass, heat-exchanger pump import is connected with hot water storgae outlet pipe；The gas phase import and export of described alkali liquor absorption tower is connected with vortex fan outlet and waste gas combustion furnace respectively；The liquid phase import and export of described alkali liquor absorption tower is connected with NaOH solution circulating pump outlet and lye tank (vat) import respectively, and lye tank (vat) outlet is connected with NaOH solution circulating pump import.
Described burning unit is the waste gas combustion furnace being provided with automatic ignition, back-fire relief and steam blowing smoke consuming apparatus.
Described surge tank and vortex fan adopt interlocking converting operation mode.
It is simple that this utility model compared with prior art has process technique, resource recovery is high, processing cost is low, greatly reduce environmental pollution, the raw material of electrolysis fluorine is can be used for after the fluohydric acid gas reclaimed, greatly improve effective utilization of resource, be the fluohydric acid gas recovery processing technique of a kind of electrolysis fluorine tail gas having very much industrial value.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation.
Detailed description of the invention
Embodiment 1
Accompanying drawings 1, the electrolysis fluorine cathode exhaust gas produced by multiple stage electrolysis bath introduces, after being collected by technology waste gas pipeline, the voltage regulation unit I being provided with pressure transmitter 2 and surge tank 1, pressure transmitter 2 be provided with the leak free vortex fan 12 of explosion-proof Magnetic drive and interlock converting operation, make gas pressure in surge tank 1 maintain between-50Pa ~ 50Pa, reduce the air pressure fluctuation in the electrowinning process electrolysis bath of front end.Through the recovery unit II that the cathode exhaust gas feeding of voltage regulation unit I buffering is made up of first-class heat exchanger 4, secondary heat exchanger 3, fridge 6 and fluohydric acid gas storage tank 7, condense, through first-class heat exchanger 4 and secondary heat exchanger 3, the liquid HF reclaimed and enter fluohydric acid gas storage tank 7；Described fridge 6 is connected into and out of pipe with secondary heat exchanger 3 tube side；Being connected with the inlet pipe of surge tank 1 outlet, secondary heat exchanger 3 shell side respectively into and out of pipe of described first-class heat exchanger 4 shell side；The pipe that goes out of described secondary heat exchanger 3 shell side is connected with the inlet pipe of first-class heat exchanger 4 tube side.
nullThe condensation of recovered unit II is reclaimed hydrofluoric cathode exhaust gas and is delivered to by three grades of heat exchangers 5 by vortex fan 12、Hot water storgae 8、Heat-exchanger pump 9、Alkali liquor absorption tower 10、The clean unit III of lye tank (vat) 13 and NaOH solution circulating pump 14 composition，Entering of three grades of heat exchanger 5 tube sides、Go out pipe respectively with first-class heat exchanger 4 tube side go out pipe and vortex fan 12 import be connected，Entering of three grades of heat exchanger 5 shell sides、Go out pipe to be connected with heat-exchanger pump 9 outlet and hot water storgae 8 water inlet pipe respectively，Heat-exchanger pump 9 import is connected with hot water storgae 8 outlet pipe，The gas phase of alkali liquor absorption tower 10 is entered、Outlet is connected with vortex fan 12 outlet and waste gas combustion furnace 11 respectively，The liquid phase of alkali liquor absorption tower 10 is entered、Outlet is connected with NaOH solution circulating pump 14 outlet and lye tank (vat) 13 import respectively，Lye tank (vat) 13 outlet is connected with NaOH solution circulating pump 14 import，Vortex fan 12 and surge tank 1 adopt interlocking converting operation mode.
Out after deep condensation reclaims cathode exhaust gas three grades of heat exchangers of entrance 5 of HF and circulating hot water heat exchange is warming up to room temperature, alkali liquor absorption tower 10 is sent into by the leak free vortex fan 12 of explosion-proof Magnetic drive from first-class heat exchanger 4 tube side, cathode exhaust gas containing HF is entered by the bottom of tower, in lye tank (vat) 13, the sodium carbonate liquor of 5% is delivered to the spray head atomization ejection of tower top by NaOH solution circulating pump 14, cathode exhaust gas and spray liquid counter current contacting, inner-tower filling material increases gas-to-liquid contact mass transfer area, HF is highly soluble in water, remove after reacting generation NaF with sodium carbonate liquor, fluorine-containing waste liquid periodic exhaustion, cathode exhaust gas after alkali liquor absorption, its HF concentration is less than 9mg/m3, HF purification efficiency reaches 99.9%.Cathode exhaust gas after purified unit III spray washing send and burns high altitude discharge after unit IV is lighted a fire, and burning unit IV is the waste gas combustion furnace 11 being provided with automatic ignition, back-fire relief and steam blowing smoke consuming apparatus.
Above-mentioned first-class heat exchanger 4, secondary heat exchanger 3 and three grades of heat exchanger 5 materials are monel metal, and alkali liquor absorption tower 10 material is carbon steel liner tetrafluoro.For meeting hydrogen requirement of explosion proof, all pipelines, storage tank and equipment are all provided with electrostatic grounding, and whole system, each device, equipment are all provided with nitrogen and purge exchange system and blowdown system.
More than simply this utility model is described further, and is not used to restriction this patent, all implement for this utility model equivalence, be intended to be limited solely by within the right of this patent.
Claims (6)
1. the fluohydric acid gas recycling and processing device of an electrolysis fluorine cathode exhaust gas, it is characterized in that this device is made up of voltage regulation unit, recovery unit, clean unit and burning unit, the cathode exhaust gas that electrolysis bath produces is delivered to voltage regulation unit by pipeline and is cushioned, cathode exhaust gas after voltage stabilizing is carried out hydrofluoric condensation and recovery by recovery unit, recovered hydrofluoric cathode exhaust gas is delivered to clean unit by vortex fan, being circulated the remaining fluohydric acid gas of spray-absorption by alkali liquor, the cathode exhaust gas after spray washing send and burns high altitude discharge after unit is lighted a fire.
2. the fluohydric acid gas recycling and processing device of electrolysis fluorine cathode exhaust gas according to claim 1, it is characterised in that described voltage regulation unit is the surge tank being provided with pressure transmitter.
3. the fluohydric acid gas recycling and processing device of electrolysis fluorine cathode exhaust gas according to claim 1, it is characterized in that described recovery unit is made up of first-class heat exchanger, secondary heat exchanger, fridge and fluohydric acid gas storage tank, the condensed fluid of first-class heat exchanger and secondary heat exchanger enters fluohydric acid gas storage tank；Described fridge is connected into and out of pipe with secondary heat exchanger tube side；Being connected with the inlet pipe of surge tank outlet, secondary heat exchanger shell side respectively into and out of pipe of described first-class heat exchanger shell side；The pipe that goes out of described secondary heat exchanger shell side is connected with the inlet pipe of first-class heat exchanger tube side.
4. the fluohydric acid gas recycling and processing device of electrolysis fluorine cathode exhaust gas according to claim 1, it is characterized in that described clean unit is made up of three grades of heat exchangers, hot water storgae, heat-exchanger pump, alkali liquor absorption tower, vortex fan, lye tank (vat) and NaOH solution circulating pump, described three grades of heat exchanger tube pass into and out of pipe respectively with first-class heat exchanger tube side go out pipe, vortex fan import is connected；Being connected with heat-exchanger pump outlet and hot water storgae water inlet pipe respectively into and out of pipe of described three grades of heat exchanger shell pass, heat-exchanger pump import is connected with hot water storgae outlet pipe；The gas phase import and export of described alkali liquor absorption tower is connected with vortex fan outlet and waste gas combustion furnace respectively；The liquid phase import and export of described alkali liquor absorption tower is connected with NaOH solution circulating pump outlet and lye tank (vat) import respectively, and lye tank (vat) outlet is connected with NaOH solution circulating pump import.
5. the fluohydric acid gas recycling and processing device of electrolysis fluorine cathode exhaust gas according to claim 1, it is characterised in that described burning unit is the waste gas combustion furnace being provided with automatic ignition, back-fire relief and steam blowing smoke consuming apparatus.
6. the fluohydric acid gas recycling and processing device according to claim 1 claim 2 or described electrolysis fluorine cathode exhaust gas, it is characterised in that described surge tank and vortex fan adopt interlocking converting operation mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620141280.2U CN205391786U (en) | 2016-02-25 | 2016-02-25 | Hydrogen fluoride recovery processing device of electrolysis system fluorine negative pole tail gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620141280.2U CN205391786U (en) | 2016-02-25 | 2016-02-25 | Hydrogen fluoride recovery processing device of electrolysis system fluorine negative pole tail gas |
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| CN205391786U true CN205391786U (en) | 2016-07-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105498272A (en) * | 2016-02-25 | 2016-04-20 | 中船第九设计研究院工程有限公司 | Hydrogen fluoride recycling and treatment device for electrolytic fluorine production cathode tail gas |
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2016
- 2016-02-25 CN CN201620141280.2U patent/CN205391786U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105498272A (en) * | 2016-02-25 | 2016-04-20 | 中船第九设计研究院工程有限公司 | Hydrogen fluoride recycling and treatment device for electrolytic fluorine production cathode tail gas |
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