CN105060313B - A kind of urea liquid hydrolyzes ammonia system processed - Google Patents
A kind of urea liquid hydrolyzes ammonia system processed Download PDFInfo
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- CN105060313B CN105060313B CN201510424980.2A CN201510424980A CN105060313B CN 105060313 B CN105060313 B CN 105060313B CN 201510424980 A CN201510424980 A CN 201510424980A CN 105060313 B CN105060313 B CN 105060313B
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Abstract
A kind of urea liquid of the present invention hydrolyzes ammonia system processed, including hydrolysis of urea reactor and tourie；Described hydrolysis of urea reactor is connected to by the middle part blowoff line and bottom blow-down pipeline of setting on the blowdown liquid interface of tourie side setting；Absorption liquid is contained with described tourie, blowdown liquid interface is below absorption liquid levels；The top of tourie sets absorbing liquid import, and bottom sets waste water discharge opening, and top sets pneumostome.By setting the tourie of normal pressure to handle blowdown, by below the liquid level of tourie bottom, setting blowdown liquid interface, the blowdown liquid after releasing is after blowdown liquid interface enters tourie dilution, decrease temperature and pressure, temperature is reduced to 80 DEG C, pressure is reduced to after normal pressure and realizes discharge；The pneumostome set by tank deck, it is ensured that pressure inside the tank will not superpressure；Not only safety and environmental protection, it ensure that the safety and health for the personnel of operating with；And impact of the high temperature high pressure liquid to follow-up equipment when reducing discharge.
Description
Technical field
The invention belongs to hydrolysis of urea Ammonia Production Processes Based field in flue gas denitrification system, and in particular to a kind of urea liquid
Hydrolysis ammonia system processed.
Background technology
The coal burning of coal-fired power plant is along with substantial amounts of nitrogen oxides (NOX) discharge, air is polluted.It is logical
Often take and add equipment for denitrifying flue gas in boiler tail, the NO in flue gas is removed using selective catalytic reduction (SCR)X, will
It is converted into nontoxic nitrogen (N2) and water (H2), O so as to reaching emission request.Needed for selective catalytic reduction
Denitrification reducing agent ammonia (NH3) generally there are three kinds of supply forms：Liquefied ammonia, ammoniacal liquor and urea.Wherein, liquefied ammonia belongs to hazardous with ammoniacal liquor
Product.There are strict legal provisions in country in the storage, use and transportation for being related to liquefied ammonia and ammoniacal liquor.And industrial urine
Element is white crystalline body particle, is not belonging to hazardous chemical category, is easy to store and transports, will not be safe hidden caused by leakage
Suffer from, therefore consider from safety and economy angle, urea ammonia is gradually favored by people, comes by using urea liquid Hydrolyze method
Realize the supply of ammonia.
Existing urea liquid Hydrolyze method is prepared in the technique of ammonia, and urea liquid passes through pipeline from urea liquid delivery pump
11 enter hydrolysis reactor 1；Heating steam from pressure and temperature reducing station by entering hydrolysis reactor heating tube bundle after adjusting valve 5,
Hydrophobic after heat exchange send drain tank；Urea liquid heating condition in reactor issues raw hydrolysis, chemical equation：
Hydrolysate and part vapor after adjusting valve 3, deliver to boiler side subsequent processing through the outlet of hydrolysis reactor 1；
The body of hydrolysis reactor 1 is located at bottom and middle part sets sewage draining exit 12,13 respectively, realizes and does not shut down blowdown during operation.
The problem of current hydrolysis of urea Ammonia Process is present：1st, hydrolysis reactor outlet does not have dump pipeline, special
In the case of different, there is no pressure release approach.Even if some systems are provided with dump pipeline, discharge pipe outlet leads to wastewater disposal basin, tightly
Wastewater disposal basin is also very poor to the assimilation effect of exhaust in the case of urgency.2nd, it is dangerous big during the hydrolysis reactor blowdown of HTHP, and
Blowdown liquefied ammonia taste is big, influences operator's health.
The content of the invention
For problems of the prior art, the present invention provides one kind can be reliable, safe to use, discharge environmental protection
Urea liquid hydrolyze ammonia system processed.
The present invention is to be achieved through the following technical solutions：
A kind of urea liquid hydrolyzes ammonia system processed, including hydrolysis of urea reactor and tourie；Described hydrolysis of urea is anti-
Device is answered to be connected to by the middle part blowoff line and bottom blow-down pipeline of setting on the blowdown liquid interface of tourie side setting；Institute
Absorption liquid is contained with the tourie stated, blowdown liquid interface is below absorption liquid levels；The top of tourie, which is set, inhales
Liquid import is received, bottom sets waste water discharge opening, and top sets pneumostome.
Preferably, tourie side sets entrance of releasing；Entrance of releasing, which is arranged on, to be absorbed below liquid levels, and by tight
Regulating valve of suddenly releasing connects with the product gas outlet of hydrolysis of urea reactor.
Further, one end that entrance of releasing is located inside tourie is connected to the scattered flusher of product qi leel.
Further, one end that absorbing liquid import is located inside tourie is connected to absorb the spray equipment of liquid dispersion.
Preferably, the side of tourie sets tourie liquid level gauge.
Preferably, bottom blow-down pipeline and middle part blowoff line are connected by blowdown liquid interface pipeline and blowdown liquid interface
Connect, and be respectively arranged with bottom blow-down technique valve and middle part blowdown technique valve；In blowdown liquid interface pipeline and middle part blowoff line
Or safety valve is provided between bottom blow-down pipeline, safety valve is in parallel with bottom blow-down technique valve and middle part blowdown technique valve.
Compared with prior art, the present invention has technique effect beneficial below：
System of the present invention is by setting the tourie of normal pressure to handle blowdown, by tourie bottom liquid
Position is following, sets blowdown liquid interface, and the blowdown liquid after releasing is after blowdown liquid interface enters tourie dilution, decrease temperature and pressure, temperature
Realization is discharged after degree is reduced to 80 DEG C, pressure is reduced to normal pressure；The pneumostome set by tank deck, it is ensured that pressure inside the tank will not superpressure；
Not only safety and environmental protection, it ensure that the safety and health for the personnel of operating with；And when reducing discharge high temperature high pressure liquid to rear
The impact of continuous equipment.
Further, in tourie bottom liquid level pressure release entrance in emergency circumstances arranged below, emergency decompression discharge gas
Discharged after into tourie, and can preferably connect scattered flusher, increase discharge gas as far as possible with absorbing
The contact area of liquid, while raising assimilation effect ensures that pressure release is smooth, it ensure that the safe operation of hydrolysis of urea reactor.
Further, it is provided with by tourie top and absorbs liquid interface, absorbing liquid is followed by spray equipment into tourie, more
The good absorption and cooling that meet to excessive gas, meets the harmless discharge requirement from pneumostome.
Further, the liquid level gauge set by tourie side, the absorbing liquid in tourie is enabled to be in half
Optimum position, ensure assimilation effect and dilution effect；The safe and reliable of blowdown ensure that by the safety valve of setting.
Brief description of the drawings
Fig. 1 is the structural representation of hydrolysis ammonia system processed described in present example.
In figure：1 is hydrolysis of urea reactor, and 2 be tourie, and 21 be blowdown liquid interface, and 22 be absorbing liquid import, and 23 be useless
Water outlet, 24 be pneumostome, and 25 be entrance of releasing, and 26 be flusher, and 27 be spray equipment；3 be that product gas outlet is adjusted
Valve, 4 be emergency discharge regulating valve, and 5 be heating steam control valve, and 6 be reactor liquid level gauge, and 7 be tourie liquid level gauge, and 8 be peace
Full valve, 9 be bottom blow-down technique valve, and 10 be middle part blowdown technique valve, and 11 be urea liquid inlet ductwork, and 12 be middle part blow-off pipe
Road, 13 be bottom blow-down pipeline, 14 blowdown liquid interface pipelines.
Embodiment
With reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
A kind of urea liquid of the present invention hydrolyzes ammonia system processed, as shown in figure 1, including hydrolysis of urea reactor 1 and tourie
2；Hydrolysis of urea reactor 1 is connected to the side of tourie 2 by the middle part blowoff line 12 and bottom blow-down pipeline 13 of setting and set
On the blowdown liquid interface 21 put；Absorption liquid is contained with tourie 2, blowdown liquid interface 21 is below absorption liquid levels；
The top of tourie 2 sets absorbing liquid import 22, and bottom sets waste water discharge opening 23, and top sets pneumostome 24.
In this preferred embodiment, the side of tourie 2 sets entrance 25 of releasing；Entrance 25 of releasing be arranged on absorb liquid levels with
Under, and connected by emergency discharge regulating valve 4 with the product gas outlet of hydrolysis of urea reactor 1.Wherein, entrance 25 of releasing is located at
One end inside tourie 2 is connected to the scattered flusher 26 of product qi leel.Absorbing liquid import 22 is located inside tourie 2
One end is connected to absorb the spray equipment 27 of liquid dispersion.Preferably the gas to be released can be absorbed.
In this preferred embodiment, the side of tourie 2 sets tourie liquid level gauge 7.Bottom blow-down pipeline 13 and middle part blowdown
Pipeline 12 is connected by blowdown liquid interface pipeline 14 with blowdown liquid interface 21, and is respectively arranged with the He of bottom blow-down technique valve 9
Middle part blowdown technique valve 10；It is provided between blowdown liquid interface pipeline 14 and middle part blowoff line 12 or bottom blow-down pipeline 13
Safety valve 8, safety valve 8 are in parallel with bottom blow-down technique valve 9 and middle part blowdown technique valve 10.
Specifically, as shown in figure 1, the present invention is under normal circumstances in use, the liquid level of tourie 2 keeps tank body half high
Degree；Below the bottom liquid level of tourie 2, set entrance 25 of releasing to be used for the in emergency circumstances pressure release discharge to product gas, promptly let out
Pressure, which is deflated, enters the flusher 27 that tourie 2 is followed by disperseing for absorbing liquid, increases discharge gas as far as possible with absorbing
The contact area of liquid.When emergency occurs, the aperture of regulation emergency discharge regulating valve 4, speed of releasing is controlled, ensureing urea
In hydrolysis reactor 1 on the premise of pressure security, assimilation effect of the tourie 2 to gas of releasing is improved.Open tourie 2 simultaneously
Absorbing liquid water intaking valve and blowoff valve, ensure the liquid level of tourie 2 stabilization.
Below the bottom liquid level of tourie 2, blowdown liquid interface 21 is also set up, blowdown liquid and safety valve jumping up release liquid through blowdown
Liquid interface 21 enter tourie 2 dilute after, temperature be reduced to 80 DEG C, pressure realize safety dumping, this preferred embodiment after being reduced to normal pressure
Illustrated exemplified by being emitted into waste pipe.
Claims (1)
1. a kind of urea liquid hydrolyzes ammonia system processed, it is characterised in that including hydrolysis of urea reactor (1) and tourie (2)；
Described hydrolysis of urea reactor (1) is connected to by the middle part blowoff line (12) and bottom blow-down pipeline (13) of setting
On the blowdown liquid interface (21) that tourie (2) side is set；
Absorption liquid is contained with described tourie (2), blowdown liquid interface (21) is below absorption liquid levels；Tourie
(2) top sets absorbing liquid import (22), and bottom sets waste water discharge opening (23), and top sets pneumostome (24)；
Described tourie (2) side sets entrance (25) of releasing；Entrance (25) of releasing, which is arranged on, to be absorbed below liquid levels, and
Connected by emergency discharge regulating valve (4) with the product gas outlet of hydrolysis of urea reactor (1)；Entrance (25) of releasing is positioned at absorption
The internal one end of tank (2) is connected to the scattered flusher (26) of product qi leel；
Described absorbing liquid import (22) is located at the spray equipment that the internal one end of tourie (2) is connected to absorb liquid dispersion
(27)；
The side of described tourie (2) sets tourie liquid level gauge (7)；
Described bottom blow-down pipeline (13) and middle part blowoff line (12) passes through blowdown liquid interface pipeline (14) and blowdown liquid
Interface (21) connects, and is respectively arranged with bottom blow-down technique valve (9) and middle part blowdown technique valve (10)；In blowdown liquid interface pipe
Safety valve (8), safety valve (8) and bottom are provided between road (14) and middle part blowoff line (12) or bottom blow-down pipeline (13)
Blowdown technique valve (9) and middle part blowdown technique valve (10) are in parallel；
Under normal circumstances in use, the liquid level of tourie (2) keeps the half height of tank body one；Below the liquid level of tourie (2) bottom, if
Put entrance of releasing (25) and be used for the in emergency circumstances pressure release discharge to product gas, after emergency decompression discharge gas enters tourie (2)
Connect the flusher (27) disperseed for absorbing liquid；
When emergency occurs, the aperture of regulation emergency discharge regulating valve (4), speed of releasing is controlled；Open tourie (2) simultaneously
Absorbing liquid water intaking valve and blowoff valve, below the liquid level of tourie (2) bottom, also set up blowdown liquid interface (21), blowdown liquid and peace
Full valve take-off releases liquid after blowdown liquid interface (21) enters tourie (2) dilution, after temperature is reduced to 80 DEG C, pressure is reduced to normal pressure
Realize safety dumping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510424980.2A CN105060313B (en) | 2015-07-17 | 2015-07-17 | A kind of urea liquid hydrolyzes ammonia system processed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510424980.2A CN105060313B (en) | 2015-07-17 | 2015-07-17 | A kind of urea liquid hydrolyzes ammonia system processed |
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| Publication Number | Publication Date |
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| CN105060313A CN105060313A (en) | 2015-11-18 |
| CN105060313B true CN105060313B (en) | 2017-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510424980.2A Active CN105060313B (en) | 2015-07-17 | 2015-07-17 | A kind of urea liquid hydrolyzes ammonia system processed |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109173723A (en) * | 2018-10-30 | 2019-01-11 | 中国海洋石油集团有限公司 | Simplification SCR denitration system for gas turbine and Waste Heat Generation unit |
| 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 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090148370A1 (en) * | 2007-12-06 | 2009-06-11 | Spencer Iii Herbert W | Process to produce ammonia from urea |
| CN202671218U (en) * | 2012-07-21 | 2013-01-16 | 山西新唐工程设计有限公司 | Urea ammonia producing hydrolyzing device |
| CN202785720U (en) * | 2012-07-31 | 2013-03-13 | 宁波金远东工业科技有限公司 | Waste liquid treatment device in process of production of synthesis ammonia and urea |
| CN204848290U (en) * | 2015-07-17 | 2015-12-09 | 中国华能集团公司 | Urea solution system ammonia system of hydrolysising |
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