CN205550016U - Nitrophosphate fertilizer acidolysis tail gas desiliconization defluorination device - Google Patents
Nitrophosphate fertilizer acidolysis tail gas desiliconization defluorination device Download PDFInfo
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- CN205550016U CN205550016U CN201620356861.8U CN201620356861U CN205550016U CN 205550016 U CN205550016 U CN 205550016U CN 201620356861 U CN201620356861 U CN 201620356861U CN 205550016 U CN205550016 U CN 205550016U
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- tail gas
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Abstract
The utility model discloses a nitrophosphate fertilizer acidolysis tail gas desiliconization defluorination device, including at least one venturi scrubber, hydrocyclone and the sealed fluid reservoir that communicate in proper order, be equipped with the fresh water (FW) import on venturi scrubber, tail gas gets into follow -up unit and carries out recycle after the hydrocyclone top is equipped with the preliminary treatment of gas exports exhaust, is equipped with the liquid outlet in hydrocyclone's lower part, is equipped with the purified liquor outlet and exports with concentrated phase liquid on sealed fluid reservoir, in addition, can also set up the alkali lye import on sealed fluid reservoir, the intercommunication is imported with the fresh water (FW) on the venturi scrubber to the purified liquor outlet that will seal up in the fluid reservoir. The utility model discloses simple and convenient solution the problem that siO2 blockked up in the acidolysis tail gas washing system, made things convenient for the processing of follow -up unit to NOX.
Description
Technical field
This utility model belongs to process industrial tail gas technical field, relates to a kind of process containing SiF4, the device of NOx tail gas, particularly relate to the device of acid hydrolysis tail gas desiliconization fluorine removal in a kind of nitrophosphate fertilizer technique.
Background technology
Nitro Phosphate Unit is the large-scale modern production device of the 900000 tons of Phosphate Fertilizer Nitrate with Frozen Methods of annual output focused the consruction on the eighties.For a long time, equipment component operational factor deviate from design load, particularly acidolysis system, due to raw material phosphorus ore complicated components, does not reaches original design requirement, and phosphorus ore and nitric acid reaction acid hydrolysis tail gas composition out is the most increasingly complex, and acidolysis gas main component has SiF4、NOX、CO2And noble gas etc., the most also it is entrained with the ground phosphate rock of trace, during washing tail gas, SiF therein4Generation SiO is reacted with water2And H2SiF6, SiO2Granularity is small, after mixing with water, breeze etc., thickness increases and in flocculence, easily cling appts wall, and build up, should not clear up, will block and cannot run in causing the equipment short time, have a strong impact on device exhaust treatment effeciency shortening device cycle of operation, exert a certain influence to device site environment, also cause great economic loss to company；Additionally, NOXComplicated component, is the exhaust gas component of acid hydrolysis tail gas emphasis process, and SiF4The SiO generated is reacted with water2、H2SiF6And HF, make NOXDeal with more difficult.According to correlative link guaranteed request during plant construction, device exhaust reaches standard-required, but aging along with the progress in epoch and device, and environmental requirement is the most harsh, make to need the acidolysis gas cell in orthonitric acid phosphate fertilizer device to improve, the most thorough by Nitro Phosphate Unit vent gas treatment, the emission request constantly improved with satisfied future, also make a due contribution for environmental protection cause simultaneously.
Summary of the invention
In order to solve the problem that the acid hydrolysis tail gas in the Nitro Phosphate Unit of prior art Central Plains is dealt with improperly, reduce SiF in acid hydrolysis tail gas4The SiO that hydrolysis generates2Impact on vent gas washing system, the utility model discloses a kind of nitrophosphate fertilizer acid hydrolysis tail gas desiliconization fluorine removal device, solves SiO in acid hydrolysis tail gas washing system simply and easily2The problem of blocking, facilitates subsequent cell to NOXProcess.
This utility model is achieved by the following technical solution:
A kind of nitrophosphate fertilizer acid hydrolysis tail gas desiliconization fluorine removal device, including:
At least one Venturi scrubber, is provided with fresh water (FW) import on Venturi scrubber, for being washed the acid hydrolysis tail gas in Venturi scrubber by the fresh water (FW) in entrance Venturi scrubber；
Cyclone hydraulic separators, the import of cyclone hydraulic separators and the outlet of Venturi scrubber, tail gas after Venturi scrubber washs is entered cyclone hydraulic separators together with fresh water (FW), after cyclone hydraulic separators is arranged over the pretreatment that gaseous phase outlet is discharged, tail gas entrance subsequent cell recycles, and is provided with liquid outlet in the bottom of cyclone hydraulic separators；
Sealing flow container, the inlet sealing flow container connects with the liquid outlet of cyclone hydraulic separators, and is provided with purified liquor outlet and the outlet of concentrated phase liquid on flow container sealing.
As a kind of preferred implementation, can in described nitrophosphate fertilizer acid hydrolysis tail gas desiliconization fluorine removal device two Venturi scrubbers, two Venturi scrubbers are sequentially communicated, first Venturi scrubber is provided with acid hydrolysis tail gas import, first and second Venturi scrubber is respectively equipped with fresh water (FW) import, the outlet of the second Venturi scrubber and the inlet communication of cyclone hydraulic separators；The difference of the treating capacity of certain specification according to Venturi scrubber and acid hydrolysis tail gas, it is also possible to the Venturi scrubber of varying number is set.
As a kind of preferred implementation, it is additionally provided with alkali liquor import sealing on flow container, typically can add the highly basic that Caustic soda is this kind of, be neutralized process by entering the acid solution sealed in flow container, be conducive to SiF4The acid that hydrolysis generates is removed.
Preferably, seal the purified liquor outlet on flow container respectively with the fresh water (FW) inlet communication on first and second Venturi scrubber, owing to having alkali liquor import on sealing flow container, make to seal the clear liquid produced in flow container in neutral or alkalescence, when the acid hydrolysis tail gas in Venturi scrubber can also be washed, also can absorb the NO of part in tail gasX。
In order to ensure that clear liquid enters the continual and steady output in Venturi scrubber, it is provided with circulating pump with on the pipeline of the fresh water (FW) inlet communication on first and second Venturi scrubber respectively, for being supplied in Venturi scrubber by the clear liquid sealed in flow container at the purified liquor outlet sealed on flow container.
Nitrophosphate fertilizer acid hydrolysis tail gas desiliconization fluorine removal device in this utility model, it is possible to effectively reduce the generation of acid hydrolysis tail gas washing system stopping state in Nitro Phosphate Unit, solve in acid hydrolysis tail gas processing procedure by SiO2The bottleneck problem being difficult to stable operation that blocking causes, also improves site environment problem, and invests low, easy to operate.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the process chart of this utility model embodiment 1.
Fig. 2 is the process chart of this utility model embodiment 2.
In Fig. 1: the first Venturi scrubber, 2. the second Venturi scrubber, 3. cyclone hydraulic separators, 4. sealing flow container, 1 '. acid hydrolysis tail gas, 2 '. fresh water (FW), 3 '. fresh water (FW), 4 '. tail gas after pretreatment, 5 '. concentrated phase water, 6 '. clear liquid.
In Fig. 2: 1. the first Venturi scrubber, 2. the second Venturi scrubber, 3. cyclone hydraulic separators, 4. sealing flow container, 5. circulating pump, 1 '. acid hydrolysis tail gas, 2 '. tail gas after pretreatment, 3 ' .40% Caustic soda, 4 '. concentrated phase water.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
Embodiment 1
As it is shown in figure 1, the 500m that in Nitro Phosphate Unit, acidolysis groove comes3/ h acid hydrolysis tail gas 1 ' flows through the first Venturi scrubber 1 and the second Venturi scrubber 2 successively, and is passed through 1.5m in the first Venturi scrubber 1 respectively3/ h fresh water (FW) 2 ', is passed through 1.5m in the second Venturi scrubber 23/ h fresh water (FW) 3 ', makes the acid hydrolysis tail gas in Venturi scrubber enter cyclone hydraulic separators 3 after being sufficiently mixed washing with fresh water (FW), and after being separated by gas-liquid-solid, after pretreatment, tail gas 4 ' enters into follow-up tail gas treating unit by the gaseous phase outlet on cyclone hydraulic separators 3 top；And containing SiO2Then entering sealing flow container 4 with the solid phase/liquid phase of HF, separate through the settlement separate concentrated phase water 5 ' by upper clear supernate 6 ' and bottom, clear liquid 6 ' and concentrated phase water 5 ' after separating are delivered to subsequent cell and are recycled.After increasing this part pretreatment system, the non-blockage phenomenon of follow-up vent gas washing system.
Embodiment 2
Nitrophosphate fertilizer acid hydrolysis tail gas desiliconization fluorine removal device as shown in Figure 2, is made up of first Venturi scrubber the 1, second Venturi scrubber 2, cyclone hydraulic separators 3, sealing flow container 4 and circulating pump 5；First Venturi scrubber 1 is provided with acid hydrolysis tail gas import, for receiving the 600m that in Nitro Phosphate Unit, acidolysis groove comes3null/ h acid hydrolysis tail gas 1 '，First Venturi scrubber 1 and the second Venturi scrubber 2 are respectively equipped with fresh water (FW) import，The outlet of the second Venturi scrubber 2 and the inlet communication of cyclone hydraulic separators 3，After being separated by gas-liquid-solid，After pretreatment, tail gas 2 ' enters into follow-up tail gas treating unit by the gaseous phase outlet of the top of cyclone hydraulic separators 3，The component of silicate and fluoride is then entered by the liquid outlet of cyclone hydraulic separators 3 bottom and seals in flow container 4，It is provided with alkali liquor import on flow container 4 sealing、Purified liquor outlet and the outlet of concentrated phase liquid，Alkali liquor import is the soda bath 3 ' of 40% for quality of reception mark，The concentrated phase water 4 ' of settlement separate rear bottom is delivered to subsequent cell recycle，Clear liquid after separating passes through circulating pump 5 respectively with first、Fresh water (FW) inlet communication on two Venturi scrubbers，Offer 3m continual and steady in each Venturi scrubber3The feedwater of/h, owing to having alkali liquor import on sealing flow container so that seals the clear liquid produced in flow container in neutral or alkalescence, moreover it is possible to when washing the acid hydrolysis tail gas in Venturi scrubber, can not only be conducive to SiO2With the removal of HF, and the NO of part can be absorbed in tail gasX.After increasing this part pretreatment system, the non-blockage phenomenon of follow-up vent gas washing system.
The foregoing is only preferred embodiment of the present utility model; not in order to limit this utility model; all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (5)
1. a nitrophosphate fertilizer acid hydrolysis tail gas desiliconization fluorine removal device, it is characterised in that including:
At least one Venturi scrubber, is provided with fresh water (FW) import on Venturi scrubber, for washing the acid hydrolysis tail gas in Venturi scrubber；
Cyclone hydraulic separators, the import of cyclone hydraulic separators and the outlet of Venturi scrubber, be arranged over gaseous phase outlet at cyclone hydraulic separators, be provided with liquid outlet in the bottom of cyclone hydraulic separators；
Sealing flow container, the inlet sealing flow container connects with the liquid outlet of cyclone hydraulic separators, and is provided with purified liquor outlet and the outlet of concentrated phase liquid on flow container sealing.
2. nitrophosphate fertilizer acid hydrolysis tail gas desiliconization fluorine removal device as claimed in claim 1, it is characterized in that: two Venturi scrubbers are sequentially communicated, first Venturi scrubber is provided with acid hydrolysis tail gas import, first and second Venturi scrubber is respectively equipped with fresh water (FW) import, the outlet of the second Venturi scrubber and the inlet communication of cyclone hydraulic separators.
3. nitrophosphate fertilizer acid hydrolysis tail gas desiliconization fluorine removal device as claimed in claim 2, it is characterised in that: it is additionally provided with alkali liquor import sealing on flow container.
4. nitrophosphate fertilizer acid hydrolysis tail gas desiliconization fluorine removal device as claimed in claim 3, it is characterised in that: seal the purified liquor outlet on flow container respectively with the fresh water (FW) inlet communication on first and second Venturi scrubber.
5. nitrophosphate fertilizer acid hydrolysis tail gas desiliconization fluorine removal device as claimed in claim 4, it is characterised in that: it is provided with circulating pump with on the pipeline of the fresh water (FW) inlet communication on first and second Venturi scrubber respectively at the purified liquor outlet sealed on flow container.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620356861.8U CN205550016U (en) | 2016-04-26 | 2016-04-26 | Nitrophosphate fertilizer acidolysis tail gas desiliconization defluorination device |
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| CN201620356861.8U CN205550016U (en) | 2016-04-26 | 2016-04-26 | Nitrophosphate fertilizer acidolysis tail gas desiliconization defluorination device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109485461A (en) * | 2018-10-17 | 2019-03-19 | 贵州芭田生态工程有限公司 | Phosphorus ore acid hydrolysis waste gas absorption and utilization method neutralize mother liquor and phosphate fertilizer preparation method |
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2016
- 2016-04-26 CN CN201620356861.8U patent/CN205550016U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109485461A (en) * | 2018-10-17 | 2019-03-19 | 贵州芭田生态工程有限公司 | Phosphorus ore acid hydrolysis waste gas absorption and utilization method neutralize mother liquor and phosphate fertilizer preparation method |
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