CN209210407U - A kind of urea hydrolysis ammonia producing system - Google Patents
A kind of urea hydrolysis ammonia producing system Download PDFInfo
- Publication number
- CN209210407U CN209210407U CN201821761307.3U CN201821761307U CN209210407U CN 209210407 U CN209210407 U CN 209210407U CN 201821761307 U CN201821761307 U CN 201821761307U CN 209210407 U CN209210407 U CN 209210407U
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- Prior art keywords
- heating zone
- urea
- ammonia
- producing system
- steam
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Abstract
The utility model provides a kind of urea hydrolysis ammonia producing system, including ammonia device processed, is equipped with the first heating zone and the second heating zone in ammonia device processed, the first heating zone is connected to the second heating zone by water absorber；The heating tube bundle of one end insertion steam heater in first heating zone, steam heater are equipped with steam inlet and condensation-water drain, and steam inlet is equipped with first flowmeter and the second regulating valve, and condensation-water drain is equipped with steam trap；First heating zone inner wall is equipped with filter device, and filter device is connected to urea liquid entrance, and urea liquid entrance is equipped with second flowmeter and third regulating valve；Heater strip is fixed in second heating zone, the second heating zone connects sewage draining exit；First heating zone and the second heating zone are all connected with gas vent.A kind of urea hydrolysis ammonia producing system described in the utility model will greatly improve the safety of denitrating system using hydrolysis of urea ammonia, while the heat source of hydrolysis of urea uses saturated vapor, is easily obtained and operating cost is lower.
Description
Technical field
The utility model belongs to denitrating flue gas field, more particularly, to a kind of urea hydrolysis ammonia producing system.
Background technique
At present in environmental protection industry (epi), mainstream technology is using ammonia as reducing agent in denitrating flue gas field, with nitrogen oxidation
Object chemically reacts, to achieve the purpose that remove nitrogen oxides.The acquirement of ammonia often by liquefied ammonia evaporation from, due to
Liquefied ammonia is poisonous and harmful, inflammable and explosive, and the liquefied ammonia amount of storage of 10t or more is defined as major hazard source by country at present, therefore is used
Liquefied ammonia evaporation obtains ammonia, and there are larger security risks.Now more common urea pyrolysis is divided urea liquid evaporation using high temperature
Solution generates ammonia, and this method increases electricity consumption since reaction temperature is high, consumption energy is big to increase the branch of factory
Out.
Summary of the invention
In view of this, the utility model is directed to a kind of urea hydrolysis ammonia producing system, with the use of urea as generation
The raw material of ammonia will greatly improve the safety of denitrating system using hydrolysis of urea ammonia, while the heat source of hydrolysis of urea uses
Saturated vapor, is easily obtained and operating cost is lower.
In order to achieve the above objectives, the technical solution of the utility model is achieved in that
A kind of urea hydrolysis ammonia producing system, including ammonia device processed are equipped with the first heating zone and the second heating zone in ammonia device processed, the
One heating zone is connected to the second heating zone by water absorber；The heating tube of one end insertion steam heater in first heating zone
Beam, steam heater are equipped with steam inlet and condensation-water drain, and steam inlet is equipped with first flowmeter and the second regulating valve,
Condensation-water drain is equipped with steam trap；First heating zone inner wall is equipped with filter device, and filter device and urea liquid entrance connect
Logical, urea liquid entrance is equipped with second flowmeter and third regulating valve；Heater strip, the second heating are fixed in second heating zone
Area connects sewage draining exit；First heating zone and the second heating zone are all connected with gas vent, and the first regulating valve is provided on gas vent
And pressure transmitter.
The operating pressure in ammonia device processed is stablized in 0.6MPa or so by adjusting the aperture of the first regulating valve.
Further, two bottom surfaces of filter device are tilted towards middle line.
Further, it is equipped with filter screen in filter device, is equipped with several through-holes on two bottom surfaces.
Several through-holes flow into filtered urea liquid in ammonia device processed to be hydrolyzed.
Further, heater strip is arranged in the shape of a spiral in the second heating zone.
Further, valve is equipped at sewage draining exit.
Further, ammonia device processed is equipped with safety valve, pressure gauge, thermometer and liquidometer.
Safety valve, pressure gauge, thermometer and liquidometer can intuitively show the operating status of equipment, while can be long-range
Monitoring.
Compared with the existing technology, a kind of urea hydrolysis ammonia producing system described in the utility model has the advantage that
A kind of urea hydrolysis ammonia producing system described in the utility model, the raw material with the use of urea as generation ammonia,
The safety of denitrating system will be greatly improved using hydrolysis of urea ammonia, while the heat source of hydrolysis of urea uses saturated vapor, easily
In obtain and operating cost it is lower；By the way that filter device is arranged in ammonia device processed, the impurity for participating in hydrolysis urea is reduced, is increased
Ammonia device processed uses the time；By the way that two heating zones will be divided into ammonia device processed, the liquid originally directly drained is carried out second
Hydrolysis, guarantee make full use of urea, improve the yield of ammonia.
Detailed description of the invention
The attached drawing for constituting a part of the utility model is used to provide a further understanding of the present invention, this is practical new
The illustrative embodiments and their description of type are not constituteed improper limits to the present invention for explaining the utility model.
In the accompanying drawings:
Fig. 1 is a kind of urea hydrolysis ammonia producing system schematic diagram described in the utility model embodiment；
Fig. 2 is a kind of urea hydrolysis ammonia producing system filter device schematic diagram described in the utility model embodiment.
Description of symbols:
1- ammonia device；The first regulating valve of 2-；3- pressure transmitter；4- safety valve；5- first flowmeter；6- steam trap；7-
Steam heater；The steam inlet 8-；9- condensation-water drain；10- urea liquid entrance；11- gas vent；12- sewage draining exit；13-
Water absorber；14- heater strip；15- filter device；151- filter screen；152- through-hole；The second regulating valve of 16-；17- third is adjusted
Valve；18- second flowmeter.
Specific embodiment
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For limitations of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as indicating
Or it implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " etc. are defined as a result,
Feature can explicitly or implicitly include one or more of the features.It is in the description of the present invention, unless another
It is described, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition
State the concrete meaning of term in the present invention.
The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figs. 1-2, a kind of urea hydrolysis ammonia producing system, including ammonia device 1 processed, ammonia device 1 processed is interior to be equipped with the first heating zone
With the second heating zone, the first heating zone is connected to the second heating zone by water absorber 13；One end insertion in first heating zone
The heating tube bundle of steam heater 7, steam heater 7 are equipped with steam inlet 8 and condensation-water drain 9, and steam inlet 8 is equipped with
First flowmeter 5 and the second regulating valve 16, condensation-water drain 9 are equipped with steam trap 6；First heating zone inner wall is equipped with filtering dress
15 are set, filter device 15 is connected to urea liquid entrance 10, and urea liquid entrance 10 is equipped with second flowmeter 18 and third tune
Save valve 17；Heater strip 14 is fixed in second heating zone, the second heating zone connects sewage draining exit 12；First heating zone and the second heating
Area is all connected with gas vent 11, and the first regulating valve 2 and pressure transmitter 3 are provided on gas vent 11.
The operating pressure in ammonia device 1 processed is stablized in 0.6MPa or so by adjusting the aperture of the first regulating valve 2.
As shown in Figs. 1-2, two bottom surfaces of filter device 15 are tilted towards middle line.
As shown in Figs. 1-2, it is equipped with filter screen 151 in filter device 15, is equipped with several through-holes 152 on two bottom surfaces.
Several through-holes 152 flow into filtered urea liquid in ammonia device 1 processed to be hydrolyzed.
As shown in Figs. 1-2, heater strip 14 is arranged in the shape of a spiral in the second heating zone.
As shown in Figs. 1-2, valve is equipped at sewage draining exit 12.
As shown in Figs. 1-2, ammonia device 1 processed is equipped with safety valve 4, pressure gauge, thermometer and liquidometer.
Safety valve 4, pressure gauge, thermometer and liquidometer can intuitively show the operating status of equipment, while can be long-range
Monitoring.
A kind of urea hydrolysis ammonia producing system described in the utility model in practical applications, by the urea of 50% concentration of room temperature
Solution send ammonia device 1 processed, so that solution is reached certain liquid level and is totally submerged steam heater 7, while 0.8M-1.0MPa is full
Enter steam heater 7 with water vapour, the urea liquid outside steam heater 7 and pipe carries out heat exchange, and steam becomes condensed water
It is discharged by steam trap 6.Hydrolysis generates ammonia and carbon dioxide after urea liquid is heated, and is discharged from gas vent 11, passes through
The urea liquid once hydrolyzed sucks the second heating zone by water absorber 13 and carries out secondary hydrolysis, guarantees the thorough of hydrolysis of urea
Bottom avoids the waste of urea liquid, and the solution after hydrolysis is discharged from sewage draining exit 12.
This system is mainly made of triple controls:
First weight: the urea that will automatically calculate out system needs according to the content denitrating flue gas DCS system of nitrogen oxides is molten
Liquid inlet demand is passed through the aperture of PID control third regulating valve 17 by second flowmeter 18, so that the inlet of urea liquid
Meet denitration demand in real time；
Second weight: according to the inlet of urea liquid, DCS system will automatically calculate out the saturation that hydrolysis urea needs to enter
Vapor dosage is controlled the aperture of the second regulating valve 16 by first flowmeter 5, is passed through the steaming to match with urea liquid inlet
Vapour amount；
Third weight: hydrolysis of urea is mainly ammonia, carbon dioxide for gas-phase space in ammonia device 1 processed after ammonia and carbon dioxide
And water vapour, positioned at the top of ammonia device 1 processed.Ammonia device 1 processed outlet is provided with the first regulating valve 2, is exported according to pressure transmitter 3
Pressure value and by PID arithmetic control gaseous phase outlet at the first regulating valve 2 aperture so that the pressure of 1 inside gas phase of ammonia device processed
Power is stablized in 0.6MPa or so.
Hydrolysis of urea key reaction formula is as follows: CO (NH2)2+H2O=2NH3↑+CO2↑.This is an endothermic process, is needed not
It inputs heat disconnectedly and is carried out so that reacting to the direction for generating ammonia, while the shifting that water energy appropriate enough promotes reaction to balance
It is dynamic, conducive to the production of ammonia.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (6)
1. a kind of urea hydrolysis ammonia producing system, it is characterised in that: be equipped with first including ammonia device (1) processed, in the ammonia device (1) processed and add
Hot-zone and the second heating zone, first heating zone and second heating zone are connected to by water absorber (13)；Described first
The heating tube bundle of one end insertion steam heater (7) in heating zone, the steam heater (7) are equipped with steam inlet (8)
With condensation-water drain (9), the steam inlet (8) is equipped with first flowmeter (5) and the second regulating valve (16), the condensed water
It exports (9) and is equipped with steam trap (6)；First heating zone inner wall is equipped with filter device (15), the filter device (15)
It is connected to urea liquid entrance (10), the urea liquid entrance (10) is equipped with second flowmeter (18) and third regulating valve
(17)；It is fixed in second heating zone heater strip (14), second heating zone connects sewage draining exit (12)；Described first adds
Hot-zone and second heating zone are all connected with gas vent (11), are provided with the first regulating valve (2) on the gas vent (11)
With pressure transmitter (3).
2. a kind of urea hydrolysis ammonia producing system according to claim 1, it is characterised in that: the two of the filter device (15)
A bottom surface is tilted towards middle line.
3. a kind of urea hydrolysis ammonia producing system according to claim 2, it is characterised in that: set in the filter device (15)
Have filter screen (151), several through-holes (152) are equipped on two bottom surfaces.
4. a kind of urea hydrolysis ammonia producing system according to claim 1, it is characterised in that: the heater strip (14) is helically
Shape is arranged in second heating zone.
5. a kind of urea hydrolysis ammonia producing system according to claim 1, it is characterised in that: be equipped at the sewage draining exit (12)
Valve.
6. a kind of urea hydrolysis ammonia producing system according to claim 1, it is characterised in that: the ammonia device (1) processed is equipped with
Safety valve (4), pressure gauge, thermometer and liquidometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821761307.3U CN209210407U (en) | 2018-10-29 | 2018-10-29 | A kind of urea hydrolysis ammonia producing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821761307.3U CN209210407U (en) | 2018-10-29 | 2018-10-29 | A kind of urea hydrolysis ammonia producing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209210407U true CN209210407U (en) | 2019-08-06 |
Family
ID=67457255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821761307.3U Expired - Fee Related CN209210407U (en) | 2018-10-29 | 2018-10-29 | A kind of urea hydrolysis ammonia producing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209210407U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115417429A (en) * | 2022-07-18 | 2022-12-02 | 华能国际电力股份有限公司大连电厂 | A urea pyrolysis system ammonia economizer for denitration of boiler flue gas |
-
2018
- 2018-10-29 CN CN201821761307.3U patent/CN209210407U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115417429A (en) * | 2022-07-18 | 2022-12-02 | 华能国际电力股份有限公司大连电厂 | A urea pyrolysis system ammonia economizer for denitration of boiler flue gas |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190806 Termination date: 20211029 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |