CN204057981U - Hydrolysis of urea reactor - Google Patents
Hydrolysis of urea reactor Download PDFInfo
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- CN204057981U CN204057981U CN201420602093.0U CN201420602093U CN204057981U CN 204057981 U CN204057981 U CN 204057981U CN 201420602093 U CN201420602093 U CN 201420602093U CN 204057981 U CN204057981 U CN 204057981U
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Abstract
The utility model discloses a kind of hydrolysis of urea reactor, comprise reactor shell and from reactor shell, stretch into the vapo(u)r blasting pipeline of its inside, urea soln import is provided with bottom reactor shell, reactor shell top is provided with product gas outlet, vapo(u)r blasting pipeline outer end is provided with steam inlet, the pipeline section sidewall that vapo(u)r blasting pipeline is positioned at reactor shell inside is provided with vapor-nozzle, hydrolysis of urea reactor of the present utility model can utilize steam to urea soln direct heating, reduce heat energy loss, disturbance can be played to urea soln again in the process of heating urea solution, stirring action, simultaneously in reaction process without the need to supplementing de-mineralized water in urea soln.
Description
Technical field
The utility model relates to denitrating flue gas field of purification, specifically a kind of hydrolysis of urea reactor.
Background technology
Along with country is to the raising of generating plant flue gas emission standard, denitrating flue gas has listed the development program of " 12 " in.Flue Gas Denitration Technology of Coal-buming Power Plant mainly contains low nitrogen burning, selective non-catalytic reduction (SNCR) and SCR (SCR).Because in China's ature of coal complexity, flue gas, NOx content is high, the SCR technology therefore with higher denitration efficiency obtains very big popularization at home.
The reductive agent of SCR gas denitrifying technology can select liquefied ammonia, ammoniacal liquor and urea.Liquefied ammonia low price, transport, running cost is low, but belongs to major hazard source, transport, stores and is all subject to strict control; Ammonia density in ammoniacal liquor is lower, and transportation cost is high, and has more metal ion in industrial ammonia, has certain influence to the life-span of catalyzer, therefore applies not extensive in the SCR engineering of coal power station; Urea is a kind of nontoxic solid particulate, and transport, storage safe is convenient, environmental sound, is applicable to denitration engineering, the coal power station that especially distance city, Residential areas are nearer.For the consideration of security and practicality, in order to overcome the potential safety hazard that the links such as liquefied ammonia transport, discharging, storage, operation, maintenance exist, the urea technique for production of ammonia being applicable to SCR denitrating flue gas causes the concern of people gradually.The technology of current urea ammonia mainly contains urea pyrolysis and hydrolysis of urea two kinds.Compare pyrolytic reaction, hydrolysis of urea process is relatively more thorough, and no coupling product produces, and consume energy little, only need low-grade steam can meet the heat demand of hydrolysis reaction, running cost is low.
At present, the hydrolysis of urea reactor that power-plant flue gas denitration adopts generally adopts the structure formation of kettle-type reboiler, steam is by the urea soln of the U-shaped coil pipe indirect heating inside reactor of hydrolyzer inside, urea soln decomposes produces ammonia and carbonic acid gas, finally discharges from reactor top and enters SCR denitration system.In actual motion, inside reactor also exists urea concentration skewness, the shortcoming of reaction solution disturbance deficiency, so, be necessary to be optimized design to current urea hydrolyser.
Therefore, for overcoming the above problems, need a kind of hydrolysis of urea reactor, steam can be utilized urea soln direct heating, saving heat energy loss, in the process of heating urea solution, disturbance, stirring action can be played to urea soln again, simultaneously in reaction process without the need to supplementing de-mineralized water in urea soln.
Utility model content
In view of this, the purpose of this utility model overcomes defect of the prior art, there is provided a kind of and in the process of heating urea solution, can play disturbance, stirring action to urea soln again, simultaneously in reaction process without the need to supplementing the hydrolysis of urea reactor of de-mineralized water in urea soln.
Hydrolysis of urea reactor of the present utility model, comprises reactor shell and from described reactor shell, stretches into the vapo(u)r blasting pipeline of its inside; Be provided with urea soln import bottom reactor shell, reactor shell top is provided with product gas outlet, and vapo(u)r blasting pipeline outer end is provided with steam inlet, and the pipeline section sidewall that vapo(u)r blasting pipeline is positioned at reactor shell inside is provided with vapor-nozzle;
Further, described reactor shell internal fixtion is provided with liquid level baffle plate and this liquid level baffle plate will be divided into reaction zone and flooded zonevvv in reactor shell, and urea soln import is arranged at bottom reaction zone;
Further, described vapo(u)r blasting pipeline is arranged in reaction zone bottom reactor shell, and vapor-nozzle is evenly distributed with the outlet of multiple and each vapor-nozzle along steam-jet siphon length direction and arranges upward;
Further, described reactor enclosure body sidewall is provided with surface blow-off mouth and the height of this surface blow-off mouth is identical with the height of liquid level baffle plate;
Further, described reactor shell top is provided with tensimeter and/or distance-transmission pressure gauge on the spot;
Further, described reactor shell top is also provided with safety valve;
Further, the outlet of unnecessary reaction solution is also provided with bottom described reactor shell and the outlet of this unnecessary reaction solution is positioned at flooded zonevvv;
Further, described reactor shell inwall is also provided with radar level gauge with liquidometer for subsequent use and radar level gauge is identical with the height of liquid level baffle plate with the height of liquidometer for subsequent use;
Further, also liquid thermometer is provided with bottom described reactor shell;
Further, described reactor shell is provided with manhole near flooded zonevvv side.
The beneficial effects of the utility model are: hydrolysis of urea reactor of the present utility model, can pour in reactor shell by urea soln import by needing the urea soln of hydrolysis, and adopt existing arbitrary steam-generating installation to produce steam and by vapo(u)r blasting pipeline, delivery of steam is inner to reactor shell, finally by vapor-nozzle, high-temperature steam is injected in urea soln, urea soln is finally made to be subject to thermal hydrolysis, compare existing employing kettle-type reboiler to be hydrolyzed for urea, hydrolysis of urea reactor of the present utility model, steam directly passes in urea soln and carries out heat exchange with it, therefore, this hydrolysis of urea reactor heating efficiency is higher, secondly, while steam heats urea soln, urea soln is played to the effect of brain hole, stirring, contribute to the carrying out of hydrolysis of urea reaction, on the other hand, existing installation is adopted to be hydrolyzed in process to urea soln, need constantly to supplement de-mineralized water, and hydrolysis of urea reactor of the present utility model, moisture is formed after passing into the vapor condensation in urea soln, therefore, without the need to supplementing de-mineralized water again in urea soln, work flow and technique is simplified.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is structural representation of the present utility model.
Embodiment
Fig. 1 is structural representation of the present utility model, and as shown in the figure, the hydrolysis of urea reactor in the present embodiment, comprises reactor shell 1 and from described reactor shell 1, stretch into the vapo(u)r blasting pipeline 3 of its inside; Urea soln import 15 is provided with bottom reactor shell 1, also be provided with bottom blow-down mouth 14 bottom certain reactor shell 1 and discharge reactor shell 1 for the waste liquid reacted, reactor shell 1 top is provided with product gas outlet 6, vapo(u)r blasting pipeline 3 outer end is provided with steam inlet 2, and the pipeline section sidewall that vapo(u)r blasting pipeline 3 is positioned at reactor shell 1 inside is provided with vapor-nozzle 4; Reactor shell 1 be can be horizontal cylinder structure and is supported by reactor bearing 17, more vapo(u)r blasting pipeline 3 can be arranged follows and is layed in reactor shell 1 intracavity bottom, compare existing employing kettle-type reboiler to be hydrolyzed for urea, hydrolysis of urea reactor of the present utility model, steam directly passes in urea soln and carries out heat exchange with it, therefore, this hydrolysis of urea reactor heating efficiency is higher; Secondly, while steam heats urea soln, urea soln is played to the effect of disturbance, stirring, contribute to the carrying out of hydrolysis of urea reaction; On the other hand, adopt existing installation to be hydrolyzed in process to urea soln, need constantly to supplement de-mineralized water, and hydrolysis of urea reactor of the present utility model, moisture is formed, therefore, without the need to supplementing de-mineralized water again in urea soln after passing into the vapor condensation in urea soln.
In the present embodiment, described reactor shell 1 internal fixtion is provided with liquid level baffle plate 5 and this liquid level baffle plate 5 is divided into reaction zone and flooded zonevvv by reactor shell 1, urea soln import 15 is arranged at bottom reaction zone, urea soln enters in reaction zone by urea soln import 15, vapor-nozzle 4 also should be arranged in reaction zone, in hydrolysis reaction, if the speed that steam enters in reactor shell 1 is too fast, or the urea soln injected is excessive, liquid level is too much caused to exceed normal level the liquor capacity caused in reactor, owing to being provided with liquid level baffle plate 5 in reactor shell 1, when liquid level of solution exceedes liquid level baffle plate 5 top, part solution will be crossed liquid level baffle plate 5 and flow to flooded zonevvv, therefore liquid level baffle plate 5 can ensure that urea soln maintains normal level.
In the present embodiment, described vapo(u)r blasting pipeline 3 is arranged in reaction zone bottom reactor shell 1, ensure that each nozzle can be immersed in the urea soln of reaction zone, vapor-nozzle 4 is evenly distributed with multiple and each vapor-nozzle 4 along steam-jet siphon length direction and exports and arrange upward, the set-up mode of this vapor-nozzle 4 can ensure that steam is comparatively even to the heating of urea soln, can reach again the well-beaten effect of urea soln simultaneously.
In the present embodiment, described reactor shell 1 sidewall is provided with surface blow-off mouth 12 and the height of this surface blow-off mouth 12 is identical with the height of liquid level baffle plate 5, the partial impurities formed in hydrolysis of urea process will float on solution surface, and the impurity and dirt that float on solution surface can be discharged by the sewage draining exit concordant with liquid level baffle plate 5 upper end.
In the present embodiment, described reactor shell 1 top is provided with tensimeter 8 and/or distance-transmission pressure gauge 9 on the spot, on the spot tensimeter 8 be existing arbitrarily can direct reading tensimeter at the scene, monitor for field staff, and the pressure value in reactor shell 1 can be transferred to remote control terminal by distance-transmission pressure gauge 9, remote job monitored by personnel is facilitated to control, to ensure that hydrolysis of urea reaction can be carried out safely and effectively.
In the present embodiment, described reactor shell 1 top is also provided with safety valve 7, for avoiding the excessive generation security incident of the gaseous tension in reactor shell 1, safety valve 7 can be set at reactor shell 1 top, safety valve 7 can adopt arbitrary automatic decompression valve in prior art, when reactor shell 1 air pressure inside reaches threshold value, safety valve 7 realizes pressure release by automatically opening.
In the present embodiment, unnecessary reaction solution outlet 13 is also provided with and this unnecessary reaction solution outlet 13 is positioned at flooded zonevvv bottom described reactor shell 1, the urea soln exceeding normal level is crossed after liquid level baffle plate 5 enters flooded zonevvv, discharge reactor shell 1 by unnecessary reaction solution outlet 13, thus again utilize after unnecessary reaction solution is collected.
In the present embodiment, described reactor shell 1 inwall is also provided with radar level gauge 10 with liquidometer 11 for subsequent use and radar level gauge 10 is identical with the height of liquid level baffle plate 5 with the height of liquidometer 11 for subsequent use, radar level gauge 10 is the metrical instrument based on time stroke principle, radar wave runs with the light velocity, and working time can be converted into thing position signal by electronic unit.Probe sends high-frequency impulse and propagates along hawser, reflect when pulse runs into material surface and received by the receptor in instrument, and range signal is converted into thing position signal, radar level gauge 10 can measure the height of liquid level in reactor shell 1 accurately, in addition, the liquid level numerical value that radar level gauge 10 is measured can transfer to remote control terminal, be convenient to staff detect reaction process long-range, liquidometer 11 for subsequent use can adopt the ordinary level meters such as sheet glass liquidometer, liquidometer 11 structure for subsequent use is simple, its reliability is higher, can monitor for operation personnel on site.
In the present embodiment, liquid thermometer 16 is also provided with bottom described reactor shell 1, the hydrolysis rate impact of temperature on urea is larger, often increase by 10 DEG C of speed of response and increase by 1.4 1 1.5 times, therefore, very important to the temperature in solution reaction process, and liquid thermometer 16 can the Temperature numerical of Real-time Collection solution, monitors for operating personnel.
In the present embodiment, described reactor shell 1 is provided with manhole 18 near flooded zonevvv side, manhole 18 can enter in reactor shell 1 for maintainer and carry out overhaul of the equipments, in addition, manhole 18 is arranged at flooded zonevvv side, when manhole 18 can be avoided poorly sealed, causes solution in reaction zone to be oozed out by manhole 18.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (10)
1. a hydrolysis of urea reactor, is characterized in that: comprise reactor shell and from described reactor shell, stretch into the vapo(u)r blasting pipeline of its inside; Be provided with urea soln import bottom described reactor shell, reactor shell top is provided with product gas outlet; Described vapo(u)r blasting pipeline outer end is provided with steam inlet, and the pipeline section sidewall that vapo(u)r blasting pipeline is positioned at reactor shell inside is provided with vapor-nozzle.
2. hydrolysis of urea reactor according to claim 1, is characterized in that: described reactor shell internal fixtion is provided with liquid level baffle plate and this liquid level baffle plate will be divided into reaction zone and flooded zonevvv in reactor shell; Described urea soln import is arranged at bottom reaction zone.
3. hydrolysis of urea reactor according to claim 2, it is characterized in that: described vapo(u)r blasting pipeline is arranged in reaction zone bottom reactor shell, described vapor-nozzle is evenly distributed with the outlet of multiple and each vapor-nozzle along steam-jet siphon length direction and arranges upward.
4. hydrolysis of urea reactor according to claim 3, is characterized in that: described reactor enclosure body sidewall is provided with surface blow-off mouth and the height of this surface blow-off mouth is identical with the height of liquid level baffle plate.
5. hydrolysis of urea reactor according to claim 4, is characterized in that: described reactor shell top is provided with tensimeter and/or distance-transmission pressure gauge on the spot.
6. hydrolysis of urea reactor according to claim 5, is characterized in that: described reactor shell top is also provided with safety valve.
7. hydrolysis of urea reactor according to claim 6, is characterized in that: be also provided with the outlet of unnecessary reaction solution bottom described reactor shell and the outlet of this unnecessary reaction solution is positioned at flooded zonevvv.
8. hydrolysis of urea reactor according to claim 7, is characterized in that: described reactor shell inwall is also provided with radar level gauge with liquidometer for subsequent use and radar level gauge is identical with the height of liquid level baffle plate with the height of liquidometer for subsequent use.
9. hydrolysis of urea reactor according to claim 8, is characterized in that: be also provided with liquid thermometer bottom described reactor shell.
10. hydrolysis of urea reactor according to claim 8, is characterized in that: described reactor shell is provided with manhole near flooded zonevvv side.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420602093.0U CN204057981U (en) | 2014-10-17 | 2014-10-17 | Hydrolysis of urea reactor |
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| CN201420602093.0U CN204057981U (en) | 2014-10-17 | 2014-10-17 | Hydrolysis of urea reactor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105775039A (en) * | 2016-03-23 | 2016-07-20 | 广船国际有限公司 | Deck heating device |
| CN109879562A (en) * | 2019-03-27 | 2019-06-14 | 中节能城市节能研究院有限公司 | A kind of septic tank device for exempting to draw clearly |
| CN110356732A (en) * | 2019-07-04 | 2019-10-22 | 昌和化学新材料(江苏）有限公司 | A kind of surge tank of diisooctyl phenyl phosphite production |
| CN110436480A (en) * | 2019-08-14 | 2019-11-12 | 中国华电科工集团有限公司 | A kind of circulation disturbance urea hydrolysis device and operating method |
-
2014
- 2014-10-17 CN CN201420602093.0U patent/CN204057981U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105775039A (en) * | 2016-03-23 | 2016-07-20 | 广船国际有限公司 | Deck heating device |
| CN109879562A (en) * | 2019-03-27 | 2019-06-14 | 中节能城市节能研究院有限公司 | A kind of septic tank device for exempting to draw clearly |
| CN110356732A (en) * | 2019-07-04 | 2019-10-22 | 昌和化学新材料(江苏）有限公司 | A kind of surge tank of diisooctyl phenyl phosphite production |
| CN110436480A (en) * | 2019-08-14 | 2019-11-12 | 中国华电科工集团有限公司 | A kind of circulation disturbance urea hydrolysis device and operating method |
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