CN101549861A - A diammonium phosphate exhaust washing method - Google Patents
A diammonium phosphate exhaust washing method Download PDFInfo
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- CN101549861A CN101549861A CNA2009101025310A CN200910102531A CN101549861A CN 101549861 A CN101549861 A CN 101549861A CN A2009101025310 A CNA2009101025310 A CN A2009101025310A CN 200910102531 A CN200910102531 A CN 200910102531A CN 101549861 A CN101549861 A CN 101549861A
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- washing
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- granulation
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Abstract
The invention discloses a diammonium phosphate exhaust washing method, including the washing of reaction granulation exhaust, drying exhaust, cooling exhaust and dust removing exhaust, which is characterized in that a pipe washer is provided in the pipeline before the reaction granulation exhaust, drying exhaust, cooling exhaust and dust removing exhaust come in the washing tower. The pipe washer includes a sprayer head (3), a washing liquid tube (5), and a regulation valve (4) provided on the washing liquid tube (5), wherein, the sprayer head (3) is provided in the middle part of the pipe body (1), and connecting flanges (2) for connecting the pipe washer on the pipeline are provided at both ends. The is has high washing efficiency and good ammonium phosphate separation effect.
Description
Technical field
The present invention relates to chemical field, relate in particular to a kind of diammonium phosphate exhaust washing method.
Background technology
In the features of DAP production, tail gas through the washing after incorporate chimney into, tail gas mainly form and washing methods as follows:
1, reaction tail gas generated by granulation washing
After the tail gas of being discharged by reactor, tablets press enters the Venturi scrubbing of reaction granulation washer one-level, enter the horizontal washer of reaction granulation secondary (this two-stage washing phosphoric acid washing), absorption portion ammonia, fluorine and dust.Then, enter reaction tail gas generated by granulation washing tower with the lower washings of density further after the washing, make fluorine content in the tail gas reach environmental requirement after, send chimney emptying by reaction tail gas generated by granulation blower fan.
2, dried tail gas washing
Gas after the dedusting of dried tail gas drying machine cyclonic separator, at first through the washing of one-level washing tower, reach the purpose of primary dust removing and gas cooling after, enter then the secondary washing tower wash with gas-liquid separation after introduce chimney emptying by drying air fan.
3, cooled exhaust gas washing and dedusting washing tail gas
Cooling bed tail gas and equipment dedusting tail gas are delivered to cooling through cooling bed outlet blower fan again and are gathered dust after washing tower washing and the gas-liquid separation, through chimney emptying after the cyclone dust removal of water cooler cyclonic separator.
This shows, the high cycle speed of existing method in washers at different levels, each washer top washing nozzle is too near from the outlet distance simultaneously, make the liquid-vapor mixture in the washer not have enough separated spaces, after causing a large amount of liquid foams to be carried secretly entering chimney, after tail gas at different levels mixed, total tolerance was excessive.Make that the gas speed in the chimney is too high.Adding liquid foam major part in chimney of bringing in the washer has little time to separate and just is excluded chimney, the drop that water vapor condensation in tail gas comes out drops to ground, owing to carry certain phosphorus ammonium solid matter secretly in this drop, make it to form the solution of phosphorus ammonium, so this drop of falling is referred to as " phosphorus ammonium rain " from tail gas.After this " phosphorus ammonium rain " dropped on the ground, because the characteristic of phosphorus ammonium, ground, road around easily making were wet and slippery, all brought potential safety hazard for traffic and production.Simultaneously, owing to contain a certain amount of phosphorus ammonium in " phosphorus ammonium rain ", cause institute to fall soil nutrient surplus in the zone, damage, make that the greening in this zone can't be implemented at all to the environment in this zone.
Summary of the invention
The objective of the invention is to overcome above-mentioned shortcoming and a kind of detersive efficiency height that provides, the diammonium phosphate exhaust washing method of phosphorus ammonium good separating effect.
A kind of diammonium phosphate exhaust washing method of the present invention comprises the steps:
(1) reaction tail gas generated by granulation washing
After the tail gas of being discharged by reactor, tablets press enters the Venturi scrubbing of reaction granulation washer one-level, enter the horizontal washer of reaction granulation secondary, absorption portion ammonia, fluorine and dust; Then,, enter reaction tail gas generated by granulation washing tower again with the lower washings of density further after the washing through the washing of tubular type washer, make fluorine content in the tail gas reach environmental requirement after, send chimney emptying by reaction tail gas generated by granulation blower fan;
(2) dried tail gas washing
Gas after the dedusting of dried tail gas drying machine cyclonic separator, at first through the washing of one-level washing tower, after reaching the purpose of primary dust removing and gas cooling, enter the tubular type washer and continue the washing cooling, enter the secondary washing tower then and wash and gas-liquid separation, introduce chimney emptying by drying air fan after making fluorine content in the tail gas reach environmental requirement;
(3) cooled exhaust gas washing and dedusting washing tail gas
Cooling bed tail gas and equipment dedusting tail gas are delivered to the washing of tubular type washer through cooling bed outlet blower fan again after the cyclone dust removal of water cooler cyclonic separator, washing back tail gas is after washing tower washing and gas-liquid separation are gathered dust in cooling, through chimney emptying.
Above-mentioned a kind of diammonium phosphate exhaust washing method, wherein: the tubular type washer comprises shower nozzle, washing lotion tube, and washing lotion tube is provided with variable valve; The body middle part is provided with shower nozzle, two ends are provided with joint flange, by joint flange the tubular type washer is connected on the pipeline.
Above-mentioned a kind of diammonium phosphate exhaust washing method, wherein: the tubular type washer can be arranged to one deck, two layers or three layers as required.
The present invention compares with prior art, as can be known from the above technical solutions, in reaction tail gas generated by granulation, dried tail gas, cooled exhaust gas and the pipeline of dedusting tail gas before entering washing tower, by the tubular type washer that is provided with shower nozzle tail gas is washed, simultaneously because of the shower nozzle of tubular type washer from the outlet close together, thereby improved effectively the washing tail gas ability, made phosphorus ammonium good separating effect, the discharging of tail gas reaches environmental requirement.
Below, further specify beneficial effect of the present invention by embodiment.
Description of drawings
Fig. 1 is the process flow sheet of existing diammonium phosphate;
Fig. 2 is a process flow sheet of the present invention;
Fig. 3 is the structural representation of tubular type washer among the present invention;
Fig. 4 is the A-A sectional view of Fig. 3.
Mark among the figure:
1, body, 2, joint flange, 3, shower nozzle, 4, the washing variable valve, 5, washing lotion tube.
Embodiment
A kind of diammonium phosphate exhaust washing method comprises the steps:
(1) reaction tail gas generated by granulation washing
After the tail gas of being discharged by reactor, tablets press enters the Venturi scrubbing of reaction granulation washer one-level, enter the horizontal washer of reaction granulation secondary (this two-stage washing phosphoric acid washing), absorption portion ammonia, fluorine and dust.Then,, enter reaction tail gas generated by granulation washing tower again with the lower washings of density further after the washing through the washing of tubular type washer, make fluorine content in the tail gas reach environmental requirement after, send chimney emptying by reaction tail gas generated by granulation blower fan.
(2) dried tail gas washing
Gas after the dedusting of dried tail gas drying machine cyclonic separator, at first through the washing of one-level washing tower, after reaching the purpose of primary dust removing and gas cooling, enter the tubular type washer and continue the washing cooling, enter the secondary washing tower then and wash and gas-liquid separation, introduce chimney emptying by drying air fan after making fluorine content in the tail gas reach environmental requirement.
(3) cooled exhaust gas washing and dedusting washing tail gas
Cooling bed tail gas and equipment dedusting tail gas are delivered to the washing of tubular type washer through cooling bed outlet blower fan again after the cyclone dust removal of water cooler cyclonic separator, washing back tail gas is after washing tower washing and gas-liquid separation are gathered dust in cooling, through chimney emptying.
The tubular type washer comprises shower nozzle 3, washing lotion tube 5, and washing lotion tube 5 is provided with variable valve 4; Body 1 middle part is provided with shower nozzle 3, two ends are provided with joint flange 2, by joint flange 2 the tubular type washer is connected on the pipeline.
The tubular type washer can be arranged to one deck, two layers or three layers as required.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, any technical solution of the present invention content that do not break away from,, all still belong in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (3)
1, a kind of diammonium phosphate exhaust washing method comprises the steps:
(1) reaction tail gas generated by granulation washing
After the tail gas of being discharged by reactor, tablets press enters the Venturi scrubbing of reaction granulation washer one-level, enter the horizontal washer of reaction granulation secondary, absorption portion ammonia, fluorine and dust; Then,, enter reaction tail gas generated by granulation washing tower again with the lower washings of density further after the washing through the washing of tubular type washer, make fluorine content in the tail gas reach environmental requirement after, send chimney emptying by reaction tail gas generated by granulation blower fan;
(2) dried tail gas washing
Gas after the dedusting of dried tail gas drying machine cyclonic separator, at first through the washing of one-level washing tower, after reaching the purpose of primary dust removing and gas cooling, enter the tubular type washer and continue the washing cooling, enter the secondary washing tower then and wash and gas-liquid separation, introduce chimney emptying by drying air fan after making fluorine content in the tail gas reach environmental requirement;
(3) cooled exhaust gas washing and dedusting washing tail gas
Cooling bed tail gas and equipment dedusting tail gas are delivered to the washing of tubular type washer through cooling bed outlet blower fan again after the cyclone dust removal of water cooler cyclonic separator, washing back tail gas is after washing tower washing and gas-liquid separation are gathered dust in cooling, through chimney emptying.
2, a kind of diammonium phosphate exhaust washing method as claimed in claim 1 is characterized in that: the tubular type washer comprises shower nozzle (3), washing lotion tube (5), and washing lotion tube (5) is provided with variable valve (4); Shower nozzle (3) is positioned at body (1) middle part, and body (1) middle part is provided with shower nozzle (3), two ends are provided with joint flange (2).
3, a kind of diammonium phosphate exhaust washing method as claimed in claim 1 is characterized in that: the tubular type washer can be arranged to one deck, two layers or three layers as required.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101025310A CN101549861B (en) | 2009-04-24 | 2009-04-24 | A diammonium phosphate exhaust washing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101025310A CN101549861B (en) | 2009-04-24 | 2009-04-24 | A diammonium phosphate exhaust washing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101549861A true CN101549861A (en) | 2009-10-07 |
| CN101549861B CN101549861B (en) | 2011-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101025310A Active CN101549861B (en) | 2009-04-24 | 2009-04-24 | A diammonium phosphate exhaust washing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102886196A (en) * | 2012-09-20 | 2013-01-23 | 山东聊城鲁西化工第五化肥有限公司 | Treatment method and treatment system for ammoniated pelleting compound fertilizer tail gas |
| CN103011112A (en) * | 2012-12-12 | 2013-04-03 | 瓮福（集团）有限责任公司 | Production method of diammonium phosphate product |
| CN105013310A (en) * | 2015-07-08 | 2015-11-04 | 瓮福（集团）有限责任公司 | Ammonium phosphate granulating tail gas washing device and method |
| CN106268127A (en) * | 2016-08-12 | 2017-01-04 | 攀钢集团西昌钢钒有限公司 | V2o5reduction kiln reduction exhaust gas recovery system and recovery process |
| CN110562944A (en) * | 2019-09-10 | 2019-12-13 | 湖北祥云(集团)化工股份有限公司 | Diammonium production system and method with high ammonia utilization rate and low ammonia emission |
-
2009
- 2009-04-24 CN CN2009101025310A patent/CN101549861B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102886196A (en) * | 2012-09-20 | 2013-01-23 | 山东聊城鲁西化工第五化肥有限公司 | Treatment method and treatment system for ammoniated pelleting compound fertilizer tail gas |
| CN103011112A (en) * | 2012-12-12 | 2013-04-03 | 瓮福（集团）有限责任公司 | Production method of diammonium phosphate product |
| CN105013310A (en) * | 2015-07-08 | 2015-11-04 | 瓮福（集团）有限责任公司 | Ammonium phosphate granulating tail gas washing device and method |
| CN106268127A (en) * | 2016-08-12 | 2017-01-04 | 攀钢集团西昌钢钒有限公司 | V2o5reduction kiln reduction exhaust gas recovery system and recovery process |
| CN106268127B (en) * | 2016-08-12 | 2018-08-03 | 攀钢集团西昌钢钒有限公司 | V2O5Reduction kiln restores exhaust gas recovery system and recovery process |
| CN110562944A (en) * | 2019-09-10 | 2019-12-13 | 湖北祥云(集团)化工股份有限公司 | Diammonium production system and method with high ammonia utilization rate and low ammonia emission |
| CN110562944B (en) * | 2019-09-10 | 2023-05-12 | 湖北祥云(集团)化工股份有限公司 | High-ammonia-utilization-rate low-ammonia-emission-amount diammonium production system and production method |
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| Publication number | Publication date |
|---|---|
| CN101549861B (en) | 2011-06-01 |
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