CN204369579U - Low-energy consumption urea hydrolysis reactor - Google Patents
Low-energy consumption urea hydrolysis reactor Download PDFInfo
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- CN204369579U CN204369579U CN201420696584.6U CN201420696584U CN204369579U CN 204369579 U CN204369579 U CN 204369579U CN 201420696584 U CN201420696584 U CN 201420696584U CN 204369579 U CN204369579 U CN 204369579U
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The utility model discloses a kind of low-energy consumption urea hydrolysis reactor, comprise reactor shell, urea soln import, the outlet of poor urea soln and utilize the heat of the poor urea soln of discharging reactor shell the urea soln that will enter reactor shell to be carried out to the waste-heat recovery device of preheating; 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 described urea soln import is arranged at bottom reaction zone, and poor urea soln outlet is arranged at bottom flooded zonevvv; Described waste-heat recovery device comprise connect urea soln import feed-pipe, connect the discharge nozzle of poor urea soln outlet and connect the interchanger of described feed-pipe and discharge nozzle.Hydrolysis of urea reactor of the present utility model can utilize the poor urea soln having reacted discharge to carry out preheating to the rich urea soln entering reactor, saving heat energy loss, shortens the reactor time of response.
Description
Technical field
The utility model relates to denitrating flue gas field of purification, specifically a kind of low-energy consumption urea hydrolysis 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 denitrating system adopts generally adopts the mode of U-shaped coil pipe steam indirect heating urea soln, and urea soln decomposes produces ammonia and carbonic acid gas, finally discharges from reactor top and enters SCR denitration system.Current hydrolyzer is in actual motion, the poor urea soln reacted in hydrolyzer is directly discharged, and the poor urea soln of discharging is because heating temperature is higher in the reaction, therefore existing urea hydrolyser energy waste is comparatively large, and the waste heat of poor urea is not recycled.
Therefore, for overcoming the above problems, needing a kind of hydrolysis of urea reactor, the poor urea soln having reacted discharge can be utilized to carry out preheating to the rich urea soln entering reactor, saving heat energy loss, shorten the reactor time of response.
Utility model content
In view of this, the purpose of this utility model overcomes defect of the prior art, provides a kind of poor urea soln having reacted discharge that can utilize the rich urea soln entering reactor to be carried out to the low-energy consumption urea hydrolysis reactor of preheating.
Low-energy consumption urea hydrolysis reactor of the present utility model, comprises reactor shell, urea soln import, the outlet of poor urea soln and utilizes the heat of the poor urea soln of discharging reactor shell the urea soln that will enter reactor shell to be carried out to the waste-heat recovery device of preheating; 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 described urea soln import is arranged at bottom reaction zone, and poor urea soln outlet is arranged at bottom flooded zonevvv; Described waste-heat recovery device comprise connect urea soln import feed-pipe, connect the discharge nozzle of poor urea soln outlet and connect the interchanger of described feed-pipe and discharge nozzle;
Further, hydrolysis of urea reactor of the present utility model also comprises the vapo(u)r blasting pipeline stretching into its inside from described reactor shell, 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;
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, also sewage draining exit is provided with bottom described reaction zone;
Further, also liquid thermometer is provided with bottom described reaction zone;
Further, described reactor shell is provided with manhole near flooded zonevvv side.
The beneficial effects of the utility model are: low-energy consumption urea hydrolysis reactor of the present utility model, can pour in reactor shell by urea soln import by needing the urea soln of hydrolysis, and urea soln is heated, urea soln is finally made to be subject to thermal hydrolysis, the thermal energy transfer that poor urea soln is carried by waste-heat recovery device by the poor urea soln with comparatively high temps of discharging after hydrolysis will be entered rich urea soln in reactor shell, compare existing urea hydrolysis reactor, hydrolysis of urea reactor of the present utility model, rich urea soln will receive the waste heat of the poor urea soln reacted before entering the reactor, therefore, this hydrolysis of urea reactor heating efficiency is higher, the reactor time of response is short, simultaneously again can conserve energy loss, the steam consumption quantity of the low-energy consumption urea hydrolysis reactor of utility model and the ratio of amonia yield are 2.8-3.5kg/kg, traditional steam consumption quantity of indirect heating type hydrolysis of urea system and the ratio of amonia yield are about 4.0-4.2kg/kg, therefore, this hydrolysis reactor energy-saving effect is remarkable.
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, as shown in the figure, the low-energy consumption urea hydrolysis reactor of the present embodiment, comprise reactor shell 1, urea soln import 6, the heat of the poor urea soln of poor urea soln outlet 8 and utilization discharge reactor shell 1 carries out the waste-heat recovery device of preheating to the urea soln that will enter reactor shell 1, waste-heat recovery device can adopt existing all can realize carrying out between liquid thermal exchange equipment realize, when utilizing the hydrolysis of urea reactor of the present embodiment to carry out hydrolysis of urea, can pour in reactor shell 1 by urea soln import 6 by needing the urea soln of hydrolysis, and urea soln is heated, urea soln is finally made to be subject to thermal hydrolysis, the thermal energy transfer that poor urea soln is carried by waste-heat recovery device by the poor urea soln with comparatively high temps of discharging after hydrolysis will be entered rich urea soln in reactor shell 1, compare existing urea hydrolysis reactor, hydrolysis of urea reactor of the present utility model, the waste heat of poor urea soln that rich urea soln will be subject to having reacted before entering the reactor, therefore, this hydrolysis of urea reactor heating efficiency is higher, the reactor time of response is short, simultaneously again can conserve energy loss.
The low-energy consumption urea hydrolysis reactor of the present embodiment also comprises the vapo(u)r blasting pipeline 3 stretching into its inside from described reactor shell 1, described vapo(u)r blasting pipeline 3 outer end is provided with steam inlet 2, 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 top is provided with product gas outlet 13, reactor shell 1 can be horizontal cylinder structure and by reactor seat supports, vapo(u)r blasting pipeline 3 can arrange multiple and be layed in reactor shell 1 intracavity bottom, compare existing employing kettle-type reboiler to be hydrolyzed for urea, the low-energy consumption urea hydrolysis reactor of the present embodiment, 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 14 and this liquid level baffle plate 14 is divided into reaction zone and flooded zonevvv by reactor shell 1, described urea soln import 6 is arranged at bottom reaction zone, poor urea soln outlet 8 is arranged at bottom flooded zonevvv, in hydrolysis reaction, steam and rich urea soln constantly pass in the reaction zone of reactor shell 1, therefore in reaction process, in reaction zone, liquid level can raise gradually, reacted poor urea soln constantly can be crossed liquid level baffle plate 14 overflow from reaction zone and enter in flooded zonevvv, therefore liquid level baffle plate 14 can ensure that urea soln maintains normal level, and flooded zonevvv can be used for collecting the poor urea soln reacted.
In the present embodiment, described waste-heat recovery device comprises the feed-pipe 10 connecting urea soln import 6, connect the discharge nozzle 9 of poor urea soln outlet 8 and connect the interchanger 11 of described feed-pipe 10 and discharge nozzle 9, interchanger 11 is existing energy-efficient equipments realizing heat transmission between material between two or more fluid of differing temps, when interchanger 11 connects, poor urea soln discharge nozzle 9 being connected to liquid changing device thermal fluid inlet and reactor shell 1 exports between 8, and feed-pipe 10 is connected between the urea soln import 6 of liquid changing device cold fluid inlet and reactor shell 1.
In the present embodiment, described vapo(u)r blasting pipeline 3 is arranged in reaction zone bottom reactor shell 1, 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, sewage draining exit 5 is also provided with bottom described reaction zone, when urea soln reaction is complete, no longer in reactor shell 1, supplement rich urea soln and when no longer producing ammonia in reactor shell 1, this sewage draining exit 5 can be led to the poor urea soln in reaction zone is discharged.
In the present embodiment, liquid thermometer 7 is also provided with bottom described reaction zone, the hydrolysis rate impact of temperature on urea is larger, often increase by 10 DEG C of speed of response and increase 1.4-1.5 doubly, therefore, very important to the temperature in solution reaction process, and liquid thermometer 7 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 12 near flooded zonevvv side, manhole 12 can enter in reactor shell 1 for maintainer and carry out overhaul of the equipments, in addition, manhole 12 is arranged at flooded zonevvv side, when manhole 12 can be avoided poorly sealed, causes solution in reaction zone to be oozed out by manhole 12.
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 (6)
1. a low-energy consumption urea hydrolysis reactor, is characterized in that: comprise reactor shell, urea soln import, the outlet of poor urea soln and utilize the heat of the poor urea soln of discharging reactor shell the urea soln that will enter reactor shell to be carried out to the waste-heat recovery device of preheating; 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 described urea soln import is arranged at bottom reaction zone, and poor urea soln outlet is arranged at bottom flooded zonevvv; Described waste-heat recovery device comprise connect urea soln import feed-pipe, connect the discharge nozzle of poor urea soln outlet and connect the interchanger of described feed-pipe and discharge nozzle.
2. low-energy consumption urea hydrolysis reactor according to claim 1, it is characterized in that: also comprise the vapo(u)r blasting pipeline stretching into its inside from described reactor shell, 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.
3. low-energy consumption urea hydrolysis 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. low-energy consumption urea hydrolysis reactor according to claim 3, is characterized in that: be also provided with sewage draining exit bottom described reaction zone.
5. low-energy consumption urea hydrolysis reactor according to claim 4, is characterized in that: be also provided with liquid thermometer bottom described reaction zone.
6. low-energy consumption urea hydrolysis reactor according to claim 5, is characterized in that: described reactor shell is provided with manhole near flooded zonevvv side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420696584.6U CN204369579U (en) | 2014-11-19 | 2014-11-19 | Low-energy consumption urea hydrolysis reactor |
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| CN201420696584.6U CN204369579U (en) | 2014-11-19 | 2014-11-19 | Low-energy consumption urea hydrolysis reactor |
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| CN204369579U true CN204369579U (en) | 2015-06-03 |
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| CN201420696584.6U Active CN204369579U (en) | 2014-11-19 | 2014-11-19 | Low-energy consumption urea hydrolysis reactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111215010A (en) * | 2020-02-27 | 2020-06-02 | 东方电气集团东方锅炉股份有限公司 | Urea hydrolysis reactor utilizing hydrophobic waste heat and urea hydrolysis method thereof |
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2014
- 2014-11-19 CN CN201420696584.6U patent/CN204369579U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111215010A (en) * | 2020-02-27 | 2020-06-02 | 东方电气集团东方锅炉股份有限公司 | Urea hydrolysis reactor utilizing hydrophobic waste heat and urea hydrolysis method thereof |
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