CN205550017U - Efficiency of nitrophosphate fertilizer acidolysis tail gas treatment is improved device - Google Patents
Efficiency of nitrophosphate fertilizer acidolysis tail gas treatment is improved device Download PDFInfo
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- CN205550017U CN205550017U CN201620356863.7U CN201620356863U CN205550017U CN 205550017 U CN205550017 U CN 205550017U CN 201620356863 U CN201620356863 U CN 201620356863U CN 205550017 U CN205550017 U CN 205550017U
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Abstract
The utility model discloses an efficiency of nitrophosphate fertilizer acidolysis tail gas treatment is improved device, including the NOx scrubbing tower, the circulating pump, the fan, subsider and circulating slot, establish the import of acidolysis tail gas in NOx scrubbing tower lateral wall lower part, establish the fresh water (FW) import on NOx scrubbing tower lateral wall upper portion, the gas outlet and the fan intercommunication at NOx scrubbing tower top, the liquid outlet of NOx scrubbing tower bottom and the inlet intercommunication of subsider, be equipped with the export of concentrated phase liquid in the bottom of subsider, be equipped with the liquid outlet on the lateral wall of subsider, liquid outlet on the subsider lateral wall and the inlet of circulating slot intercommunication, and it is imported to be equipped with alkali lye on the circulating slot, play liquid on the circulating slot and the inlet of circulating pump intercommunication, the liquid outlet of circulating pump respectively with concentrated phase water receiving element and NOx scrubbing tower on circulation fluid import intercommunication. The utility model discloses simple and convenient solution in the acidolysis tail gas washing system siO2 block up not high this technological problem of NOx treatment effeciency in the acidolysis tail gas that arouses.
Description
Technical field
This utility model belongs to industrial tail gas processing technology field, relates to a kind of process containing SiF4、NOXThe device of tail gas, particularly to a kind of device improving nitrophosphate fertilizer acid hydrolysis tail gas treatment effeciency.
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 device improving nitrophosphate fertilizer acid hydrolysis tail gas treatment effeciency, solves SiO in acid hydrolysis tail gas washing system simply and easily2NOx treatment effeciency this technical barrier the highest in the acid hydrolysis tail gas that blocking causes.
This utility model is achieved by the following technical solution:
A kind of device improving nitrophosphate fertilizer acid hydrolysis tail gas treatment effeciency, including NOx scrubbing tower, circulating pump, blower fan, subsider and circulating slot, it is provided with acid hydrolysis tail gas import in NOx scrubbing tower lower sidewall, it is provided with fresh water (FW) import in NOx scrubbing tower side wall upper part, the gas outlet at NOx scrubbing tower top is connected with blower fan by pipeline, the liquid outlet of NOx wash tower bottoms connects with the inlet of subsider, the outlet of concentrated phase liquid it is provided with in the bottom of subsider, the sidewall of subsider is provided with liquid outlet, liquid outlet on subsider sidewall connects with the inlet of circulating slot, and on circulating slot, it is provided with alkali liquor import, the liquid that goes out on circulating slot connects with the inlet of circulating pump, the liquid outlet of circulating pump receives the circulation fluid inlet communication on unit and NOx scrubbing tower with concentrated phase water respectively.Generally can add the highly basic that Caustic soda is this kind of, the liquid entered in circulating slot is neutralized process, be conducive to separating SiF in removal system4The SiO that hydrolysis generates2And silicate；Certainly, circulating pump and the power of blower fan and number adjust according to practical situation.
In order to allow recirculated water utilize more fully, making recirculated water wash acid hydrolysis tail gas more fully, be provided with at least two circulation fluid import on NOx scrubbing tower, the liquid outlet of circulating pump receives the circulation fluid inlet communication on unit and NOx scrubbing tower with concentrated phase water respectively.Owing to adding alkali liquor in circulating slot, make the clear liquid produced in circulating slot in neutral or alkalescence, when the acid hydrolysis tail gas in NOx scrubbing tower can also be washed, the situation that can effectively reduce the blocking of Nitro Phosphate Unit acid hydrolysis tail gas washing system occurs, drastically increase the treatment effeciency of NOx in acid hydrolysis tail gas, also improve site environment problem, and invest low, easy to operate.
Preferably, NOx scrubbing tower is provided with two circulation fluid imports.
The beneficial effects of the utility model are: by transforming this device, increase subsider and circulating slot, to separate the SiO generated in removal system2And silicate, change water wash system is caustic washing system simultaneously, the situation that can effectively reduce the blocking of Nitro Phosphate Unit acid hydrolysis tail gas washing system occurs, drastically increase the treatment effeciency of NOx in acid hydrolysis tail gas, the treatment effeciency of NOx in acid hydrolysis tail gas can be risen to more than 85% by 60%, also improve site environment problem, and invest 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 nitrophosphate fertilizer acid hydrolysis tail gas processing means of the prior art.
Fig. 2 is the device flow chart of embodiment of the present utility model.
In figure: 1.NOx scrubbing tower, 2. blower fan, 3. subsider, 4. circulating slot, 5. circulating pump.
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
nullThe device improving nitrophosphate fertilizer acid hydrolysis tail gas treatment effeciency as shown in Figure 2，Including NOx scrubbing tower 1、Circulating pump 5、Blower fan 2、Subsider 3 and circulating slot 4，It is provided with acid hydrolysis tail gas import in NOx scrubbing tower 1 lower sidewall，It is provided with fresh water (FW) import in NOx scrubbing tower 1 side wall upper part，The gas outlet at NOx scrubbing tower 1 top is connected with blower fan 2 by pipeline，Liquid outlet bottom NOx scrubbing tower 1 connects with the inlet of subsider 3，The outlet of concentrated phase liquid it is provided with in the bottom of subsider 3，The sidewall of subsider 3 is provided with liquid outlet，Liquid outlet on subsider 3 sidewall connects with the inlet of circulating slot 4，And on circulating slot 4, it is provided with alkali liquor import，Alkali liquor import department on circulating slot 4 is passed through the soda bath that mass fraction is 40%，The pH of solution in circulating slot 4 is made to maintain 9-10，In subsider 3, sodium salt concentration is below 15%，The concentrated phase water that subsider 3 is separated is delivered to subsequent cell and is recycled，The liquid that goes out on circulating slot 4 connects with the inlet of circulating pump 5，The liquid outlet of circulating pump 5 receives two circulation fluid inlet communication on unit and NOx scrubbing tower 1 with concentrated phase water respectively.Acid hydrolysis tail gas acid hydrolysis tail gas import from NOx scrubbing tower 1 enters, it is fully contacted absorption in alkaline solution with circulating pump 5 is sent here, make the NOx in gas phase be emitted into subsequent cell after being lowered to technological requirement to reprocess, in acid hydrolysis tail gas, the treatment effeciency of NOx is brought up to 88-90% by the 57-59% of original device, the non-blockage phenomenon of whole vent gas washing system, also improve site environment problem, and invest low, easy to operate.
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 (3)
1. improve a device for nitrophosphate fertilizer acid hydrolysis tail gas treatment effeciency, including NOXScrubbing tower, circulating pump and blower fan, it is characterised in that: also include subsider and circulating slot, at NOXScrubbing tower lower sidewall is provided with acid hydrolysis tail gas import, it is provided with fresh water (FW) import in NOx scrubbing tower side wall upper part, the gas outlet at NOx scrubbing tower top is connected with blower fan by pipeline, the liquid outlet of NOx wash tower bottoms connects with the inlet of subsider, the outlet of concentrated phase liquid it is provided with in the bottom of subsider, the sidewall of subsider is provided with liquid outlet, liquid outlet on subsider sidewall connects with the inlet of circulating slot, and on circulating slot, it is provided with alkali liquor import, the liquid that goes out on circulating slot connects with the inlet of circulating pump, the liquid outlet of circulating pump receives the circulation fluid inlet communication on unit and NOx scrubbing tower with concentrated phase water respectively.
2. improve the device of nitrophosphate fertilizer acid hydrolysis tail gas treatment effeciency as claimed in claim 1, it is characterized in that: be provided with at least two circulation fluid import on NOx scrubbing tower, the liquid outlet of circulating pump receives the circulation fluid inlet communication on unit and NOx scrubbing tower with concentrated phase water respectively.
3. improve the device of nitrophosphate fertilizer acid hydrolysis tail gas treatment effeciency as claimed in claim 2, it is characterised in that: on NOx scrubbing tower, it is provided with two circulation fluid imports.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620356863.7U CN205550017U (en) | 2016-04-26 | 2016-04-26 | Efficiency of nitrophosphate fertilizer acidolysis tail gas treatment is improved device |
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| CN201620356863.7U CN205550017U (en) | 2016-04-26 | 2016-04-26 | Efficiency of nitrophosphate fertilizer acidolysis tail gas treatment is improved device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731605A (en) * | 2016-12-29 | 2017-05-31 | 临沂圣大环保工程有限公司 | Nitrate method phosphoric acid plant vent gas from reaction tank processing unit and method |
| 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 |
-
2016
- 2016-04-26 CN CN201620356863.7U patent/CN205550017U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731605A (en) * | 2016-12-29 | 2017-05-31 | 临沂圣大环保工程有限公司 | Nitrate method phosphoric acid plant vent gas from reaction tank processing unit and method |
| 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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