CN104096512A - Demister at urea hydrolysis reactor outlet - Google Patents
Demister at urea hydrolysis reactor outlet Download PDFInfo
- Publication number
- CN104096512A CN104096512A CN201410342968.2A CN201410342968A CN104096512A CN 104096512 A CN104096512 A CN 104096512A CN 201410342968 A CN201410342968 A CN 201410342968A CN 104096512 A CN104096512 A CN 104096512A
- Authority
- CN
- China
- Prior art keywords
- section
- hydrolysis
- demisting
- outlet
- reactor outlet
- 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.)
- Granted
Links
Landscapes
- Separating Particles In Gases By Inertia (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a demister at a urea hydrolysis reactor outlet. The demister comprises a barrel as well as a cyclone demisting section and a mesh demisting section which are sequentially arranged in the barrel in a serial connection manner and separated by an annular baffle, wherein the lower end of the barrel extends into the urea hydrolysis reactor outlet, and a gas-phase outlet is formed in the upper end and fixed with the urea hydrolysis reactor outlet; a gas outlet end of the mesh demisting section is communicated with the gas-phase outlet, and a gas inlet end is connected with a gas discharge end of the cyclone demisting section; gas inlets of the cyclone demisting section are arranged on the side wall of the barrel, and a liquid discharge port in the lower end of the cyclone demisting section extends below the liquid level in a urea hydrolysis reactor. According to the demister, two stages of serially connected devices are adopted to perform demisting, the first stage is separation of large liquid drops through cyclone type demisting, and the second stage is separation of small drops through mesh demisting; gas flows from an outlet of the cyclone demisting section enter the mesh demisting section in a rotating flowing manner, so that lengths of the motion traces of the gas flows in the mesh demisting section are increased, the demisting effect of the mesh demisting section is improved, the better comprehensive demisting effect is realized, and the demisting capacity 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
Hydrolysis of urea legal system, for ammonia, is a kind of reducing agent preparation technology in coal steam-electric plant smoke SCR denitrating technique.Its principle be urea liquid in hydrolysis reactor, under uniform temperature and pressure, there is hydrolysis and generate ammonia and carbon dioxide.After ammonia, carbon dioxide and the part steam generating leaves hydrolysis reactor, send into boiler flue, carry out denitration reaction.Hydrolysis reactor inner space is divided into bottom liquid Space and upper gaseous phase space, due to the violent boiling of liquid Space, makes vapor phase space except being full of the steam of product ammonia, carbon dioxide and part evaporation, is also mingled with a large amount of droplets.Droplet composition and hydrolysis liquid phase are same, are dissolved with part urea.If droplet is followed hydrolysate and is left together hydrolysis reactor and enter subsequent technique flow process, due to the variation of the factors such as subsequent technique operating pressure in the flowline, can cause droplet vaporization, the urea being dissolved in droplet can crystallization, blocking pipe and equipment.Therefore must try one's best and reduce the droplet quantity of leaving hydrolysis reactor.
In industry, conventional technology is, in the outlet of hydrolysis reactor product, mesh mist eliminator is set at present, as shown in Figure 1, on the one hand because the medium and small droplet content of gas phase is large, be subject to the restriction of mesh mist eliminator self demist ability, unsatisfactory except fog effect, remove fog effect and cannot improve.Current mesh mist eliminator is taked built-in fixed structure on the other hand, after occurring to stop up, is difficult for maintenance and changes.
Summary of the invention
For problems of the prior art, the invention provides a kind of operating efficiency high, keep in repair and change hydrolysis of urea reactor outlet demister easily.
The present invention is achieved through the following technical solutions:
A kind of hydrolysis of urea reactor outlet demister comprises cylindrical shell, and series connection is arranged on its cyclone defroster section of being separated by toroidal membrane and silk screen demist section in cylindrical shell successively; The setting of hydrolysis of urea reactor outlet is stretched in cylindrical shell lower end, and upper end forms gaseous phase outlet and fixes with hydrolysis of urea reactor outlet; Silk screen demist section outlet side is communicated with gaseous phase outlet, and inlet end connects the exhaust end of cyclone defroster section; The air inlet of cyclone defroster section is arranged on the sidewall of cylindrical shell, and the leakage fluid dram of cyclone defroster section lower end stretches into liquid level in hydrolysis of urea reactor and arranges below.
Preferably, the lower surface of silk screen demist section is inverted cone surface setting.
Further, the bottom center of silk screen demist section is provided with the steady scroll bar that extends to leakage fluid dram.
Preferably, air inlet is symmetricly set on the sidewall with the corresponding cylindrical shell of cyclone defroster section, and the inner circle of the airintake direction of air inlet and its place cylindrical shell is tangent.
Further, be provided with and be spiral-distributed guide vane in leakage fluid dram, the hand of spiral of guide vane is identical with air-flow rotation direction in cyclone defroster section.
Preferably, cylindrical shell upper end articulates fixing by the outlet(discharge) flange and the hydrolysis of urea reactor outlet that arrange.
Compared with prior art, the present invention has following useful technique effect:
The present invention is by adopting two-stage series connection device to carry out demist, and the first order is the large drop of cyclone type demist in can separation bubble, and the second level is the droplet in silk screen demist separation bubble; Enter silk screen demist section by cyclone defroster section exit flow in the mode of rotational flow, thereby increase the movement locus length of air-flow in silk screen demist section, improve the fog effect that removes of silk screen demist section, and then obtain better comprehensive except fog effect, demist ability is stronger, the entirety of equipment is compared existing design except fog effect and is greatly improved, and the gas band liquid measure after demister reduces more than 50%; By by original built-in fixing mesh mist eliminator structure, change two-stage series connection integral type insert structure into simultaneously, facilitated inspection and maintenance.
Further, by the inverted cone surface setting to silk screen demist section lower end, increase mesh mist eliminator and the initial contact area flowing containing fog, improved silk screen demist section dirty removal capacities.On the other hand, the liquid of being collected by mesh mist eliminator is easy to, being enriched in cone segments bottom and getting rid of in time, better improve silk screen demist section dirty removal capacities.
Further, utilize and be arranged on the steady scroll bar in silk screen demist section lower end, can stablize the vortex core of swirling eddy, reduce vortex core end precession effect, improve the separative efficiency of cyclone defroster section; Steady scroll bar can be guided to the collection liquid that is enriched in mesh mist eliminator cone segments bottom demister bottom discharge on the other hand, improves again the separative efficiency of silk screen demist section.
Further, by being symmetrical arranged of air inlet make air-flow in the time entering by the restriction of air inlet, can be voluntarily form eddy current in cyclone defroster section and improve separating effect.
Further, by flowing into urea liquid in hydrolysis reactor after the guide vane guiding arranging, can reduce and collect the disturbance of liquid to solution in hydrolysis reactor, minimizing is splashed, and has reduced the liquid content in air-flow.
Further, the quick-fit by the flange realization in the setting of cylindrical shell upper end with reactor outlet, the efficiency that has improved maintenance and changed.
Brief description of the drawings
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 cutaway view.
In figure: cyclone defroster section 1, silk screen demist section 2, air inlet 3, gaseous phase outlet 4, orchid 5, leakage fluid dram 6, guide vane 7, cylindrical shell 10 are sent out in outlet.
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.
A kind of hydrolysis of urea reactor outlet of the present invention demister, as shown in Figure 3, it comprises cylindrical shell 10, and series connection is arranged on its cyclone defroster section 1 of being separated by toroidal membrane 9 and silk screen demist section 2 in cylindrical shell 10 successively; The setting of hydrolysis of urea reactor outlet is stretched in cylindrical shell 10 lower ends, and upper end forms gaseous phase outlet 4 and fixes with hydrolysis of urea reactor outlet; Described silk screen demist section 2 outlet sides are communicated with gaseous phase outlet 4, 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 cylindrical shell 10, and the leakage fluid dram 6 of cyclone defroster section 1 lower end stretches into liquid level in hydrolysis of urea reactor and arranges below.Wherein, as shown in Figure 3, the lower surface of silk screen demist section 2 is inverted cone surface setting, and bottom center is provided with the steady scroll bar 8 that extends to leakage fluid dram 6.As shown in Figure 3, air inlet 3 is symmetricly set on the sidewall of cylindrical shell 10 corresponding to cyclone defroster section 1, and as shown in Figure 4, the inner circle of the airintake direction of air inlet 3 and its place cylindrical shell 10 is tangent.As shown in Figure 3 and Figure 4, be provided with and be spiral-distributed guide vane 7 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 shown in Figure 3, cylindrical shell 10 upper ends articulate fixing by the outlet(discharge) flange 5 arranging with hydrolysis of urea reactor outlet.
When the present invention uses, as shown in Figure 2, the present invention is articulated fixing by outlet(discharge) flange 5 and hydrolysis of urea reactor outlet, and be bolted; The mist of the steam composition of hydrolysis of urea generates in hydrolysis of urea reactor ammonia, carbon dioxide and partial gasification carries droplet and is entered in cyclone defroster section 1 by air inlet 3, in cyclone defroster section 1, rotate, the drop of greater particle size is under the effect of centrifugal force, be thrown on the wall of cyclone defroster section 1, under the effect of gravity and downdraught, discharged by leakage fluid dram 6, and under the effect of guide vane 7, without getting back in hydrolysis of urea reactor of splashing.Mixed air and granule drop upwards enter in silk screen demist section 2 via cyclone defroster section 1, and it is separated that droplet is screw in silk screen demist section 2, and the mist after demist leaves hydrolysis reactor through gaseous phase outlet 4 and enters subsequent processing; Drop separated in silk screen demist section 2 collects and discharges through steady scroll bar 8 guiding at the conical surface of bottom, and steady scroll bar 8 has played the effect at the interior eddy current of stable cylindrical shell 10 center simultaneously, has improved overall separating effect; The entirety of equipment is compared former design except fog effect and is greatly improved, and the gas band liquid measure after demister reduces more than 50%.
Mode of the invention process is not only limited to this.
Claims (6)
1. a hydrolysis of urea reactor outlet demister, it is characterized in that, comprise cylindrical shell (10), and series connection is arranged on its cyclone defroster section (1) and silk screen demist section (2) of being separated by toroidal membrane (9) in cylindrical shell (10) successively; The setting of hydrolysis of urea reactor outlet is stretched in described cylindrical shell (10) lower end, and upper end forms gaseous phase outlet (4) and fixes with hydrolysis of urea reactor outlet; Described silk screen demist section (2) outlet side is communicated with gaseous phase outlet (4), 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 cylindrical shell (10), and the leakage fluid dram (6) of cyclone defroster section (1) lower end stretches into liquid level in hydrolysis of urea reactor and arranges below.
2. a kind of hydrolysis of urea reactor outlet demister according to claim 1, is characterized in that, the lower surface of silk screen demist section (2) is inverted cone surface setting.
3. a kind of hydrolysis of urea reactor outlet demister according to claim 1 and 2, is characterized in that, the bottom center of silk screen demist section (2) is provided with the steady scroll bar (8) that extends to leakage fluid dram (6).
4. 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 with the corresponding cylindrical shell of cyclone defroster section (1) (10), and the inner circle of the airintake direction of air inlet (3) and its place cylindrical shell (10) is tangent.
5. according to a kind of hydrolysis of urea reactor outlet demister described in claim 1 or 4, it is characterized in that, in described leakage fluid dram (6), be provided with and be spiral-distributed guide vane (7), the hand of spiral of guide vane (7) is identical with air-flow rotation direction in cyclone defroster section (1).
6. a kind of hydrolysis of urea reactor outlet demister according to claim 1, is characterized in that, described cylindrical shell (10) upper end articulates fixing by the outlet(discharge) flange (5) arranging with hydrolysis of urea reactor outlet.
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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104096512A true CN104096512A (en) | 2014-10-15 |
| CN104096512B CN104096512B (en) | 2016-06-15 |
Family
ID=51665287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410342968.2A Expired - Fee Related CN104096512B (en) | 2014-07-17 | 2014-07-17 | A kind of hydrolysis of urea reactor outlet demister |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104096512B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104876242A (en) * | 2015-05-11 | 2015-09-02 | 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 |
| CN114917688A (en) * | 2021-02-03 | 2022-08-19 | 中国石油天然气集团有限公司 | Centrifugal separation system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2014
- 2014-07-17 CN CN201410342968.2A patent/CN104096512B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104876242A (en) * | 2015-05-11 | 2015-09-02 | 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 |
| CN114917688A (en) * | 2021-02-03 | 2022-08-19 | 中国石油天然气集团有限公司 | Centrifugal separation system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104096512B (en) | 2016-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102580408B (en) | Active centrifugal gas-liquid separation device | |
| CN100482320C (en) | Gas absorption purifier | |
| CN106823576A (en) | A kind of method that heat-exchange dedusting device, the UTILIZATION OF VESIDUAL HEAT IN dusting and desulfuring system comprising it and UTILIZATION OF VESIDUAL HEAT IN are coupled with dedusting | |
| CN205760172U (en) | A kind of sub-demister of high gas velocity eddy flow | |
| CN105311906B (en) | A kind of large-scale gas-liquid separator | |
| CN201823405U (en) | Cyclone demister exhausting gas down | |
| CN105597472A (en) | Pneumatic cyclone combined demisting device | |
| CN104096512A (en) | Demister at urea hydrolysis reactor outlet | |
| RU2672426C1 (en) | Device for gas purification | |
| CN203990536U (en) | A kind of hydrolysis of urea reactor outlet demister | |
| CN203820734U (en) | Two-stage combined washing and dust removing device for synthesis gas containing solid particles | |
| CN101322908A (en) | Wet-type high-efficient desulfation dust-extraction device and method | |
| CN103468324B (en) | The blender wash mill of dusty gas and blender washing system | |
| CN102921259B (en) | Self-circulation rotary liquid combined type gas filter and filtering method thereof | |
| CN202113731U (en) | High-efficient oil-water separator | |
| CN106000013A (en) | Wet desulfurization flue gas ultra-clean emission treatment system | |
| CN102125895A (en) | Cyclone | |
| US2271642A (en) | Method and apparatus for purifying gases | |
| CN205886495U (en) | Gas -liquid separating device | |
| RU147796U1 (en) | SULFUR GAS RINSING AND COOLING UNIT | |
| CN206965404U (en) | A kind of high-efficient wet-type cleaning dust device | |
| CN105999975A (en) | De-dusting demisting device | |
| CN106582249B (en) | Circulating fluidized bed boiler deep desulfuration dust pelletizing system | |
| CN207169353U (en) | Composite boiler flue-gas dust-removing and desulfurization device | |
| CN206121331U (en) | Centrifugal gas -liquid defroster |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160615 Termination date: 20170717 |