CN104096512B - A kind of hydrolysis of urea reactor outlet demister - Google Patents
A kind of hydrolysis of urea reactor outlet demister Download PDFInfo
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- CN104096512B CN104096512B CN201410342968.2A CN201410342968A CN104096512B CN 104096512 B CN104096512 B CN 104096512B CN 201410342968 A CN201410342968 A CN 201410342968A CN 104096512 B CN104096512 B CN 104096512B
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Abstract
One hydrolysis of urea reactor outlet demister of the present invention includes cylinder, and is sequentially connected in series and is arranged in cylinder its cyclone defroster section separated by toroidal membrane and silk screen is except mist section; Cylinder lower end is stretched into hydrolysis of urea reactor outlet and is arranged, and upper end forms gaseous phase outlet and fixes with hydrolysis of urea reactor outlet; Silk screen connects with gaseous phase outlet except mist section outlet side, and inlet end connects the exhaust end of cyclone defroster section; The air inlet of cyclone defroster section is arranged on the sidewall of cylinder, and it is arranged below that the leakage fluid dram of cyclone defroster section lower end stretches into liquid level in hydrolysis of urea reactor. Removing mist by adopting two-stage series connection device to carry out, the first order is that cyclone type removes the mist big drop of separation, and the second level is that silk screen removes mist separation droplet; In the way of rotational flow, enter silk screen except mist section by cyclone defroster section exit flow, add air-flow at silk screen except the movement locus length in mist section, improve silk screen except mist section except fog effect, it is thus achieved that better comprehensive except fog effect, except mist ability is higher.
Description
Technical field
The invention belongs to gas denitrifying technology field, relate to a kind of hydrolysis of urea reactor outlet demister.
Background technology
Ureal antigen prepares ammonia, is a kind of reducing agent preparation technology in coal steam-electric plant smoke SCR denitration technique. Its principle be urea liquid in hydrolysis reactor, under uniform temperature and pressure, occur hydrolysis to generate ammonia and carbon dioxide. Ammonia, carbon dioxide and the part steam generated sends into boiler flue after leaving hydrolysis reactor, carries out denitration reaction. Hydrolysis reactor inner space is divided into lower liquid phase space and upper gaseous phase space, due to the boiling that liquid Space is violent, makes vapor phase space except the steam of full product ammonia, carbon dioxide and part evaporation, is also mingled with substantial amounts of droplet. Droplet composition is same with hydrolysis liquid phase, is dissolved with part carbamide. If droplet is followed hydrolyzate and is left hydrolysis reactor entrance subsequent process flow together, the change of the factors such as pressure is operated due to subsequent process flow, droplet can be caused to vaporize, be dissolved in the carbamide in droplet then can crystallization, blocking pipeline and equipment. Therefore must reduce the droplet quantity leaving hydrolysis reactor as far as possible.
Current row technology commonly used in the trade is to arrange mesh mist eliminator in the outlet of hydrolysis reactor product, as it is shown in figure 1, on the one hand owing to the medium and small droplet content of gas phase is big, by mesh mist eliminator self except the restriction of mist ability, except fog effect is unsatisfactory, except fog effect cannot improve. Mesh mist eliminator current on the other hand takes built-in fixed structure, not easily maintenance and replacing after blocking.
Summary of the invention
For problems of the prior art, the present invention provides a kind of work efficiency high, keeps in repair and change convenient hydrolysis of urea reactor outlet demister.
The present invention is achieved through the following technical solutions:
A kind of hydrolysis of urea reactor outlet demister includes cylinder, and is sequentially connected in series and is arranged in cylinder its cyclone defroster section separated by toroidal membrane and silk screen is except mist section;Cylinder lower end is stretched into hydrolysis of urea reactor outlet and is arranged, and upper end forms gaseous phase outlet and fixes with hydrolysis of urea reactor outlet; Silk screen connects with gaseous phase outlet except mist section outlet side, and inlet end connects the exhaust end of cyclone defroster section; The air inlet of cyclone defroster section is arranged on the sidewall of cylinder, and it is arranged below that the leakage fluid dram of cyclone defroster section lower end stretches into liquid level in hydrolysis of urea reactor.
Preferably, silk screen removes the lower surface of mist section is that inverted cone surface is arranged.
Further, silk screen is provided with the steady scroll bar extending to leakage fluid dram except the bottom center of mist section.
Preferably, air inlet is symmetricly set on the sidewall of cylinder corresponding to cyclone defroster section, and the airintake direction of air inlet is tangent with the inner circle of its place cylinder.
Further, being provided with the guide vane helically arranged in leakage fluid dram, the hand of spiral of guide vane is identical with air-flow rotation direction in cyclone defroster section.
Preferably, cylinder upper end is fixing with the mounting of hydrolysis of urea reactor outlet by the outlet(discharge) flange arranged.
Compared with prior art, the present invention has following useful technique effect:
The present invention by adopting two-stage series connection device to carry out removing mist, the first order be cyclone type remove mist can big drop in separation bubble, the second level is the droplet that silk screen removes in mist separation bubble; In the way of rotational flow, silk screen is entered except mist section by cyclone defroster section exit flow, thus adding air-flow at silk screen except the movement locus length in mist section, improve silk screen except mist section except fog effect, and then obtain better comprehensive except fog effect, except mist ability is higher, the entirety of equipment is greatly improved except fog effect compares existing design, and the gas band liquid measure after demister reduces by more than 50%; Simultaneously by by original built-in fixing mesh mist eliminator structure, changing two-stage series connection integral type insert structure into, facilitate maintenance and safeguard.
Further, by silk screen except the inverted cone surface of mist section lower end is arranged, increase mesh mist eliminator and initial contact area containing fog stream, improve silk screen except mist section dirty removal capacities. On the other hand, the liquid collected by mesh mist eliminator is prone to be enriched in cone segments bottom and getting rid of in time, better improves silk screen except mist section dirty removal capacities.
Further, utilization is arranged on silk screen except the steady scroll bar in mist section lower end, it is possible to stablizes the vortex core of swirling eddy, reduces vortex core end precession effect, improves the separation efficiency of cyclone defroster section; The collection liquid being enriched in mesh mist eliminator cone segments bottom can be guided to demister bottom discharge by steady scroll bar on the other hand, improves again silk screen except the separation efficiency of mist section.
Further, by air inlet be symmetrical arranged so that air-flow enter time by the restriction of air inlet, it is possible to voluntarily cyclone defroster section formed eddy current improve separating effect.
Further, the guide vane by arranging flows into urea liquid in hydrolysis reactor after guiding, it is possible to reduces and collects liquid to the disturbance of solution in hydrolysis reactor, reduces and splash, reduce the liquid content in air-flow.
Further, realize the quick-fit with reactor outlet by the flange arranged in cylinder upper end, improve maintenance and the efficiency changed.
Accompanying drawing explanation
Fig. 1 is hydrolysis of urea reactor outlet mesh mist eliminator structural representation in prior art.
Fig. 2 is the use state diagram of demister described in this patent example.
Fig. 3 is the structural representation of demister described in this patent example.
Fig. 4 is that the A-A of Fig. 3 is to sectional view.
In figure: cyclone defroster section 1, silk screen removes mist section 2, air inlet 3, gaseous phase outlet 4, and outlet sends out blue 5, leakage fluid dram 6, guide vane 7, cylinder 10.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail, and the explanation of the invention is not limited.
One hydrolysis of urea reactor outlet demister of the present invention, as it is shown on figure 3, it includes cylinder 10, and is sequentially connected in series and is arranged in cylinder 10 its cyclone defroster section 1 separated by toroidal membrane 9 and silk screen is except mist section 2; Cylinder 10 lower end is stretched into hydrolysis of urea reactor outlet and is arranged, and upper end forms gaseous phase outlet 4 and fixes with hydrolysis of urea reactor outlet; Described silk screen connects with gaseous phase outlet 4 except mist section 2 outlet side, and inlet end connects the exhaust end of cyclone defroster section 1; The air inlet 3 of cyclone defroster section 1 is arranged on the sidewall of cylinder 10, and it is arranged below that the leakage fluid dram 6 of cyclone defroster section 1 lower end stretches into liquid level in hydrolysis of urea reactor. Wherein, as it is shown on figure 3, silk screen is that inverted cone surface is arranged except the lower surface of mist section 2, and bottom center is provided with the steady scroll bar 8 extending to leakage fluid dram 6. As it is shown on figure 3, air inlet 3 is symmetricly set on the sidewall of cylinder 10 corresponding to cyclone defroster section 1, as shown in Figure 4, the airintake direction of air inlet 3 is tangent with the inner circle of its place cylinder 10. As shown in Figure 3 and Figure 4, being provided with the guide vane 7 helically arranged in leakage fluid dram 6, the hand of spiral of guide vane 7 is identical with air-flow rotation direction in cyclone defroster section 1. As it is shown on figure 3, cylinder 10 upper end is fixing with the mounting of hydrolysis of urea reactor outlet by the outlet(discharge) flange 5 arranged.
When the present invention uses, as in figure 2 it is shown, the present invention is fixing with the mounting of hydrolysis of urea reactor outlet by outlet(discharge) flange 5, and be bolted; The mixing gas of the steam composition of ammonia, carbon dioxide and the partial gasification that hydrolysis of urea generates in hydrolysis of urea reactor carries droplet and is entered in cyclone defroster section 1 by air inlet 3, rotate in cyclone defroster section 1, the drop of greater particle size is under the influence of centrifugal force, it is thrown on the wall of cyclone defroster section 1, discharged by leakage fluid dram 6 under the effect of gravity and downdraught, and under the effect of guide vane 7, return in hydrolysis of urea reactor without what splash. Mixed air and little particle droplet are upwardly into silk screen except, in mist section 2, droplet helically moves separated in silk screen is except mist section 2 via cyclone defroster section 1, enter subsequent processing except the mixing gas after mist leaves hydrolysis reactor through gaseous phase outlet 4; Removing the drop separated in mist section 2 conical surface in bottom at silk screen collect and guide discharge through steady scroll bar 8, steady scroll bar 8 has simultaneously worked as the effect of vortex centers in stable cylinder 10, improves the separating effect of entirety; The entirety of equipment compares original design being greatly improved except fog effect, and the gas band liquid measure after demister reduces by more than 50%.
Mode of the invention process is not limited to this.
Claims (5)
1. a hydrolysis of urea reactor outlet demister, it is characterized in that, including cylinder (10), and it is sequentially connected in series and is arranged in cylinder (10) its cyclone defroster section (1) separated by toroidal membrane (9) and silk screen removes mist section (2); Described cylinder (10) lower end is stretched into hydrolysis of urea reactor outlet and is arranged, and upper end forms gaseous phase outlet (4) and fixes with hydrolysis of urea reactor outlet; Described silk screen connects with gaseous phase outlet (4) except mist section (2) outlet side, and inlet end connects the exhaust end of cyclone defroster section (1); The air inlet (3) of described cyclone defroster section (1) is arranged on the sidewall of cylinder (10), and it is arranged below that the leakage fluid dram (6) of cyclone defroster section (1) lower end stretches into liquid level in hydrolysis of urea reactor;Silk screen is that inverted cone surface is arranged except the lower surface of mist section (2).
2. a kind of hydrolysis of urea reactor outlet demister according to claim 1, it is characterised in that silk screen is provided with, except the bottom center of mist section (2), the steady scroll bar (8) extending to leakage fluid dram (6).
3. a kind of hydrolysis of urea reactor outlet demister according to claim 1, it is characterized in that, described air inlet (3) is symmetricly set on the sidewall of cylinder (10) corresponding to cyclone defroster section (1), and the airintake direction of air inlet (3) is tangent with the inner circle of its place cylinder (10).
4. a kind of hydrolysis of urea reactor outlet demister according to claim 1 or 3, it is characterized in that, being provided with the guide vane (7) helically arranged in described leakage fluid dram (6), the hand of spiral of guide vane (7) is identical with air-flow rotation direction in cyclone defroster section (1).
5. a kind of hydrolysis of urea reactor outlet demister according to claim 1, it is characterised in that described cylinder (10) upper end is fixing with the mounting of hydrolysis of urea reactor outlet by the outlet(discharge) flange (5) arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410342968.2A CN104096512B (en) | 2014-07-17 | 2014-07-17 | A kind of hydrolysis of urea reactor outlet demister |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410342968.2A CN104096512B (en) | 2014-07-17 | 2014-07-17 | A kind of hydrolysis of urea reactor outlet demister |
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| Publication Number | Publication Date |
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| CN104096512A CN104096512A (en) | 2014-10-15 |
| CN104096512B true CN104096512B (en) | 2016-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410342968.2A Expired - Fee Related CN104096512B (en) | 2014-07-17 | 2014-07-17 | A kind of hydrolysis of urea reactor outlet demister |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104876242B (en) * | 2015-05-11 | 2017-03-22 | 北京新叶能源科技有限公司 | Three-phase fluidization equipment and method for producing ammonia from urea by virtue of catalytic hydrolysis |
| CN110436481A (en) * | 2019-09-04 | 2019-11-12 | 黄思嘉 | A kind of hydrolysis of urea reactor gas-liquid recovery system and its recovery method |
| CN114917688B (en) * | 2021-02-03 | 2024-07-26 | 中国石油天然气集团有限公司 | Centrifugal separation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103830987A (en) * | 2014-03-17 | 2014-06-04 | 济南西斯普换热系统有限公司 | Tail gas recycling haze reducing augmenter |
| CN203990536U (en) * | 2014-07-17 | 2014-12-10 | 中国华能集团公司 | A kind of hydrolysis of urea reactor outlet demister |
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Granted publication date: 20160615 Termination date: 20170717 |