CN202933617U - Ammoniated tail gas treatment system for fluidized bed large granular urea device - Google Patents
Ammoniated tail gas treatment system for fluidized bed large granular urea device Download PDFInfo
- Publication number
- CN202933617U CN202933617U CN2012204865168U CN201220486516U CN202933617U CN 202933617 U CN202933617 U CN 202933617U CN 2012204865168 U CN2012204865168 U CN 2012204865168U CN 201220486516 U CN201220486516 U CN 201220486516U CN 202933617 U CN202933617 U CN 202933617U
- Authority
- CN
- China
- Prior art keywords
- tail gas
- ammonia
- treatment system
- ammonium sulfate
- pipeline
- 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.)
- Expired - Lifetime
Links
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The utility model relates to an ammoniated tail gas treatment system for a fluidized bed large granular urea device, which solves the problem that the available tail gas treatment system for the fluidized bed large granular urea device has a dedusting effect, but does not have an ammonia removal function. The ammoniated tail gas treatment system adopts the technical scheme that the ammoniated tail gas treatment system comprises a dust washing tower and an ammonia removal absorption tower, wherein water replenishing inlets, a tail gas inlet, a tail gas outlet, an ammonium sulfate solution outlet and a solution circulation inlet are formed in the ammonia removal absorption tower; a tail gas outlet of the dust washing tower is connected with the tail gas inlet of the ammonia removal absorption tower through a pipeline; the tail gas outlet of the ammonia removal absorption tower is connected with an induced draft fan through a pipeline; and the ammonium sulfate solution outlet is connected with the solution circulation inlet through a pipeline via a solution circulation pump. The ammoniated tail gas treatment system is simple in structure, simple to control, low in equipment investment, and low in operating cost, and can recover urea dust and ammonia from tail gas.
Description
Technical field
The utility model relates to a kind of exhaust treatment system of chemical field, specifically a kind of fluid bed large granule urea plant ammonia-containing exhaust treatment system.
Background technology
Fluid bed granular urea production technology is to be to carry out transpiring moisture on the urea solution jet atomizing fluidized bed seed in looping back comminutor of 95-97wt% with concentration, and cooling forming solidified in crystallization.
Due to the ammonia that contains a certain amount of free ammonia in above-mentioned urea liquid and urea generation biuret produces in course of conveying, this amount is about the 0.08%(w.t. of solution weight), so produce in tail gas at the fluid bed granular urea and contain a large amount of ammonia and carbamide dust, wherein, tail gas ammonia content is 200 ~ 250mg/Nm
3
But the exhaust treatment system in fluid bed granular urea process units is the retracting device of useful processing carbamide dust (as the dust washing tower) only, and not for the retracting device of ammonia in tail gas, the ammonia in tail gas will directly be discharged in atmosphere by tail gas like this.Calculate to produce granular urea per ton, the ammonia of exhaust emissions loss is about 0.8kg, in China, fluid bed granular urea yearly productive capacity is about 1,300 ten thousand tons, and the ammonia of exhaust emissions loss reaches 10400 tons, is equivalent to 3,120 ten thousand yuan of RMB, tail gas does not add processing and directly is disposed to atmosphere, not only cause huge resource wealth waste, and the several times discharging that exceeds standard, atmospheric environment is brought serious pollution.
Summary of the invention
The purpose of this utility model is in order to solve the problems of the technologies described above, provide a kind of simple in structure, control simple, equipment investment is low, operating cost is low, can reclaim simultaneously the fluid bed large granule urea plant exhaust treatment system of carbamide dust and ammonia in tail gas.
Technical scheme comprises the dust washing tower, also include except ammonia absorber, the described ammonia absorber that removes is provided with moisturizing import, tail gas import, tail gas outlet, ammonium sulfate outlet and solution circulation entrance, the tail gas outlet of described dust washing tower connects the tail gas import that removes ammonia absorber through pipeline, the tail gas outlet that removes ammonia absorber connects air-introduced machine through pipeline, and the ammonium sulfate outlet is connected with the solution circulation entrance through solution circulation pump by pipeline.
Described removing on ammonia absorber also is provided with the sulfuric acid solution entrance, and described sulfuric acid solution entrance is connected with sulfuric acid storage tank through the sulfuric acid feed pump by pipeline.
Described ammonium sulfate outlet also is connected with the ammonium sulfate tank through solution circulation pump by pipeline.
Described absorption tower can be vertical, can be also Horizontal type.The absorption tower can be directly and carbamide dust scrubbing tower integrated installation together, also can be installed separately.Packed tower can be adopted in the absorption tower, also can adopt void tower.
In native system, the dust-laden ammonia-containing exhaust is sent into to drive in the wrong direction with acid absorbent-ammonium sulfate except ammonia absorber after the dedusting of dust washing tower again and is contacted, make ammonia in tail gas and the acid in the ammonium sulfate generation ammonium sulfate that reacts, to the ammonium sulfate after washing tail gas through solution circulation pump be recycled to the solution circulation entrance again with tail gas countercurrent washing, iterative cycles.When the ammonium sulfate content in ammonium sulfate reaches setting concentration, can partly introduce the ammonium sulfate tank and sell as byproduct; Simultaneously, be evaporated to the moisture loss in tail gas and send the moisture that ammonium sulfate is taken away outside for making up, can be by filling into water except the moisturizing import in ammonia absorber, and according to the difference of the acidity in the ammonium sulfate that detects with design acidity, in the sulfuric acid feed pump fills into the concentrated sulfuric acid in concentrated sulfuric acid storage tank except ammonia absorber in right amount.
Beneficial effect:
1) native system is simple in structure, high except ammonia efficient, energy consumption is low, installations is simple, low equipment investment, operation control simply, maintenance cost is low.Not only can remove carbamide dust after using native system that the tail gas of fluid bed granular urea production technology is processed, and the tail gas ammonia content that is disposed to atmosphere can reach 30mg/Nm
3, meet environmental emission standard.
2) in native system, ammonia is with 40%-45%(weight) form of ammonium sulfate reclaims, and subtracted few airborne release, and the environment amenable while, ammonium sulfate itself is also a kind of nitrogenous fertilizer, can be used as by-product sale, increases Business Economic Benefit.
3) native system is not only applicable to newly-built urea plant, can be used for the transformation of original fluid bed bulky grain device urea washing tail gas equipment yet.
Description of drawings
Fig. 1 is the native system schematic diagram.
Wherein, 1-dust washing tower, 2-contain the tail gas of carbamide dust and ammonia, tail gas, C-tail gas, D-ammonium sulfate, the E-concentrated sulfuric acid, the F-water that B-contains ammonia except ammonia absorber, the import of 2.1-tail gas, the outlet of 2.2-tail gas, the outlet of 2.3-ammonium sulfate, 2.4-solution circulation entrance, 2.5-sulfuric acid solution entrance, 2.6-water inlet, 3-air-introduced machine, 4-ammonium sulfate tank, 5-sulfuric acid storage tank, 6-sulfuric acid feed pump, 7-solution circulation pump, A-.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further explained explanation:
with reference to Fig. 1, described ammonia absorber 2 tower tops that remove are provided with tail gas outlet 2.2, establish ammonium sulfate outlet 2.3 and tail gas import 2.1 at the bottom of tower, tower body is established moisturizing import 2.6, sulfuric acid solution entrance 2.5 and solution circulation entrance 2.4(are located at the tower body epimere), described tail gas import 2.1 except ammonia absorber 2 connects the tail gas outlet of dust washing tower 1 through pipeline, the tail gas outlet 2.2 that removes ammonia absorber 2 connects air-introduced machine 3 through pipeline, ammonium sulfate outlet 2.3 is connected with the ammonium sulfate tank with solution circulation entrance 2.4 respectively through solution circulation pump 7 by pipeline and is connected, described sulfuric acid solution entrance 2.5 is connected with sulfuric acid storage tank 5 through sulfuric acid feed pump 6 by pipeline.
Operation principle:
The tail gas A that contains carbamide dust and ammonia discharges by the tail gas outlet of dust washing tower 1 the tail gas B that contains ammonia through the 1 dedusting washing of dust washing tower, recovery carbamide dust, send into except washing with ammonium sulfate absorption liquid counter current contacting in ammonia absorber 2 through the tail gas import 2.1 except ammonia absorber 2 by pipeline, make ammonia in tail gas and the acid in the ammonium sulfate absorption liquid generation ammonium sulfate that reacts, the tail gas D later except ammonia discharged by the tail gas outlet 2.2 at the end, top, and send into chimney through extractor 3 and efflux, tail gas ammonia content can be down to 30mg/Nm
3, meet environmental emission standard; Ammonium sulfate absorption liquid at the bottom of tower continues with the tail gas counter current contacting except ammonia stripping through ammonium sulfate outlet 2.3, solution circulation pump 7, be recycled to through solution circulation entrance 2.4 and recycle except ammonia absorber 2 again.Ammonium sulfate concentrations in tower being detected in the ammonium sulfate absorption liquid reaches 40%-45%(weight) time, can partly introduce and make the byproduct of ammonium sulfate solution D in sulfuric acid storage tank 5.For keeping Efficient Cycle amount, acid number (pH is 4) and the density requirements (1025kg/m of ammonium sulfate absorption liquid in tower
3), can correspondingly fill into water through water inlet 2.6 in tower, and through sulfuric acid feed pump 6, the concentrated sulfuric acid E in sulfuric acid storage tank 5 is filled in tower, to keep Efficient Cycle amount, acid number and the density requirements of requirement, and the time real monitoring above-mentioned data whether in claimed range, in time carry out Reasonable Regulation And Control according to concrete data.During the device initial start-up, at first start the solution circulation of washing and recycling system, namely except the extremely suitable liquid level of moisturizing in ammonia absorber 2, start 7 dozens of circulations of solution circulation pump, replenish concentrated sulfuric acid E through concentrated sulfuric acid entrance 2.5 to removing ammonia absorber 2 by sulfuric acid feed pump 6 again, until solution acid number PH is 4.After system feeds intake, after the fluidized bed pelletizer tail gas A process dust washing tower 1 that contains urea and ammonia out, enter except ammonia absorber 2, the concentrated sulfuric acid E in this solution and the ammonia react in tail gas generate ammonium sulfate.
Claims (3)
1. fluid bed large granule urea plant ammonia-containing exhaust treatment system, comprise the dust washing tower, it is characterized in that, also include except ammonia absorber, the described ammonia absorber that removes is provided with moisturizing import, tail gas import, tail gas outlet, ammonium sulfate outlet and solution circulation entrance, described tail gas import except ammonia absorber connects the dust washing tower through pipeline, the tail gas outlet that removes ammonia absorber connects air-introduced machine through pipeline, and the ammonium sulfate outlet is connected with the solution circulation entrance through solution circulation pump by pipeline.
2. fluid bed large granule urea plant ammonia-containing exhaust treatment system as claimed in claim 1, is characterized in that, described removing on ammonia absorber also is provided with the sulfuric acid solution entrance, and described sulfuric acid solution entrance is connected with sulfuric acid storage tank through the sulfuric acid feed pump by pipeline.
3. fluid bed large granule urea plant ammonia-containing exhaust treatment system as claimed in claim 1 or 2, is characterized in that, described ammonium sulfate outlet also is connected with the ammonium sulfate tank through solution circulation pump by pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204865168U CN202933617U (en) | 2012-09-21 | 2012-09-21 | Ammoniated tail gas treatment system for fluidized bed large granular urea device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204865168U CN202933617U (en) | 2012-09-21 | 2012-09-21 | Ammoniated tail gas treatment system for fluidized bed large granular urea device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202933617U true CN202933617U (en) | 2013-05-15 |
Family
ID=48317879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204865168U Expired - Lifetime CN202933617U (en) | 2012-09-21 | 2012-09-21 | Ammoniated tail gas treatment system for fluidized bed large granular urea device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202933617U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107715676A (en) * | 2017-10-10 | 2018-02-23 | 鲁西化工集团股份有限公司煤化工分公司 | A kind of production technology for reducing urea prilling tower tail gas ammonia content |
| WO2018122379A1 (en) * | 2016-12-30 | 2018-07-05 | Yara International Asa | Method for processing a gas stream comprising urea dust and ammonia |
| CN112221333A (en) * | 2020-09-25 | 2021-01-15 | 山东圣大环保工程有限公司 | Ammonia-containing waste gas absorption, purification and recovery device |
| CN115138200A (en) * | 2022-07-19 | 2022-10-04 | 山东中望环境工程有限公司 | System and method for treating ammonia-containing tail gas of fluidized bed large-particle urea device |
| CN115779665A (en) * | 2023-01-30 | 2023-03-14 | 上海境业环保能源科技股份有限公司 | Fluidized bed granulator tail gas purification system |
-
2012
- 2012-09-21 CN CN2012204865168U patent/CN202933617U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018122379A1 (en) * | 2016-12-30 | 2018-07-05 | Yara International Asa | Method for processing a gas stream comprising urea dust and ammonia |
| CN107715676A (en) * | 2017-10-10 | 2018-02-23 | 鲁西化工集团股份有限公司煤化工分公司 | A kind of production technology for reducing urea prilling tower tail gas ammonia content |
| CN112221333A (en) * | 2020-09-25 | 2021-01-15 | 山东圣大环保工程有限公司 | Ammonia-containing waste gas absorption, purification and recovery device |
| CN115138200A (en) * | 2022-07-19 | 2022-10-04 | 山东中望环境工程有限公司 | System and method for treating ammonia-containing tail gas of fluidized bed large-particle urea device |
| CN115779665A (en) * | 2023-01-30 | 2023-03-14 | 上海境业环保能源科技股份有限公司 | Fluidized bed granulator tail gas purification system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202933617U (en) | Ammoniated tail gas treatment system for fluidized bed large granular urea device | |
| CN102228776A (en) | Method and apparatus for removing sulfur dioxide from sulfuric acid industrial tail gas, and for recovering sulfuric acid | |
| CN103980955B (en) | Coal gas desulfurization and sulfur regeneration technique and device | |
| CN106348267B (en) | A kind of method and device of Nitrogen-and Phosphorus-containing waste water production Diammonium phosphate (DAP) | |
| CN202778240U (en) | Recovery and treatment device for clean flue gas | |
| CN104208994A (en) | Sodium metabisulfite exhaust gas desulfurization process | |
| CN102390822B (en) | Method and device for producing phosphoric acid by using tailing eluate | |
| CN104138703A (en) | Waste gas treatment process and device in isophthaloyl dichloride/paraphthaloyl chloride production | |
| CN103755393B (en) | Device and method for co-producing potassium sulphate compound fertilizer from tripolycyanamide tail gas | |
| CN202506309U (en) | Ammonia washing and recovering device | |
| CN202844801U (en) | Urea dust recovery device | |
| CN103613107B (en) | Natural pond liquid deamination and ammonia recovery method | |
| CN201686637U (en) | Hexamethylenetetramine preparing device by gas phase method | |
| CN217526958U (en) | Ammonia tail gas absorption device | |
| CN203128457U (en) | Device for removing saturated water in methane chloride | |
| CN102698582A (en) | Ammonium bicarbonate desulfurization process and ammonium bicarbonate desulfurization process system | |
| CN107126826A (en) | Ammonia-contained tail gas treating device and method in prepared by a kind of soda ash | |
| CN201990481U (en) | Concentration device for dilute hydrochloric acid | |
| CN205109283U (en) | Nitric acid ammonium phosphate production tail gas dust collector | |
| CN204891274U (en) | Urea low pressure decomposition tower | |
| CN102631825A (en) | Processing method for tail gas generated in preparation of ammonium sulfate from phosphogypsum | |
| CN212383460U (en) | Treatment system for absorbing tail gas sulfur dioxide gas | |
| CN203990257U (en) | Between/paraphthaloyl chloride produce in emission-control equipment | |
| CN202654928U (en) | Ammonium bicarbonate desulfurization process system | |
| CN1053890C (en) | Process for reducing the ammonia content of a gaseous effluent from urea production plants |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130515 |