CN205781964U - A kind of low temperature is continuously for ammonia device - Google Patents
A kind of low temperature is continuously for ammonia device Download PDFInfo
- Publication number
- CN205781964U CN205781964U CN201620658447.2U CN201620658447U CN205781964U CN 205781964 U CN205781964 U CN 205781964U CN 201620658447 U CN201620658447 U CN 201620658447U CN 205781964 U CN205781964 U CN 205781964U
- Authority
- CN
- China
- Prior art keywords
- union
- ammonia
- steam
- low temperature
- storage tank
- 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.)
- Active
Links
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The utility model discloses a kind of low temperature continuously for ammonia device, including liquid ammonia storage tank, also include with liquid ammonia storage tank bottom the vapor heat exchanger of laminating；Vapor heat exchanger includes the steam union of equal camber and condenses water union, also includes some tubulations, and one end connection steam union of tubulation, other end connection condenses water union；Steam union is provided with steam inlet, condenses and is provided with drain valve group below water union.This utility model is applicable to the winter of severe cold area stably for ammonia device, this device is directly arranged in outside ammonia tank, by heating ammonia tank and maintaining certain liquid temperature to ensure stable confession ammonia, it is not necessary to transformation ammonia tank, liquefied ammonia and gas ammonia pipeline, it is convenient to implement, and investment and operating cost are relatively low.
Description
Technical field
This utility model relates to for ammonia device, particularly relates to a kind of low temperature and supplies ammonia device continuously, is particularly suited for low temperature
Area.
Background technology
Along with the raising day by day of national environmental standard, for NOxDischarge standard tighten up, for thermal power plant SCR denitration dress
The situation that puts into operation put also is included in environment monitoring.The fired power generating unit of China's active service is all mounted with denitrification apparatus, and 95% at present
Below the SCR denitration technology with liquefied ammonia as reducing agent is all used.Owing to liquefied ammonia has explosion hazard, liquid ammonia storage tank is all
Outdoor arrangement, to prevent ammonia accumulation from causing poisoning or blast to facilitate fire-fighting during accident to process simultaneously.
For the severe cold area such as northeast, northwest, winter temperature is on the low side, at April annual November to next year, nighttime temperature
Often below-10 DEG C, the coldest monthly mean temperature as little as-20 DEG C, extreme low temperature can reach less than-40 DEG C, and liquefied ammonia is saturated
Steam pressure declines with temperature and substantially reduces, and travels under low pressure reduces.Therefore, the liquefied ammonia system of severe cold area the most all can
Liquefied ammonia transfer pump is set to start for ammonia during low temperature.According to fire-fighting and fire safety rules, ammonia tank field is away between ammonia district process equipment
Distance is general, and more than 10 meters, centre sets passageway for fire apparatus, and during liquefied ammonia transfer pump is generally disposed between process equipment.Therefore liquefied ammonia
With ammonia tank distance relatively, liquefied ammonia transfer pump export pipeline is longer and bending is many, and entry resistance is bigger for pump.
When temperature is down to-10 DEG C, ammonia tank saturated vapour pressure reduces to 2.908bar (absolute pressure), due to pressure relatively
Low pipe resistance big now liquefied ammonia again can not flow into liquefied ammonia transfer pump from ammonia tank swimmingly.When temperature is down to-15 DEG C, liquid
In ammonia tank, saturated vapour pressure is down to 2.362bar, and now liquefied ammonia has been difficult to flow into liquefied ammonia transfer pump, when ammonia pump starts,
It is susceptible to cavitation erosion cannot run well, so that entering without continuous print liquefied ammonia in liquid ammonia evaporator, it is impossible to stably supply to SCR region
Ammonia, thus cause denitration out of service.Owing to environmental requirement is strict, stop spray ammonia overlong time and will cause boiler down, power plant
The environmental protection pressure that fortune is brought is moved back in denitration to be born, and must bear and shut down the economic loss caused.
For solving this problem, project is had to attempt changing into being suitable for cryogen by Ordinary Centrifugal Pumps by liquefied ammonia transfer pump
Canned motor pump, but canned motor pump to such as enter pipeline arrange, entrance liquid level difference have strict requirements, liquid phase circulation line to be installed and
Gas phase loop, draws contact to liquid phase circulation line and gas phase loop and pipe arrangement requires the highest, adds for built ammonia district
Dress difficulty is relatively big, and because liquid ammonia storage tank body cannot increase the mouth of pipe, cofferdam, ammonia district is higher is also difficult to ensure that card pumping intake piping has a down dip confession always
Material, and to be generally multiple stage unit public in ammonia district, unless complete plant shutdown, otherwise can not transform original ammonia pipeline.And, if with shielding
Cover pump as low temperature supplying ammonia device, in addition it is also necessary near former ammonia tank field, dig a pump nearby cheat to meet entrance liquid level difference requirement,
Setting up a pump hole awning again for rainproof also need, internal being also required in pump hole considers hydrops emission measure.Therefore, Overall Reconstruction is not only
Difficulty is greatly and costly.
Utility model content
The purpose of this utility model is, it is provided that a kind of low temperature is continuously for ammonia device, it is possible to provide heat tracing for liquid ammonia storage tank,
And the heat exchanger as heat tracing is fitted with liquid ammonia storage tank, it is possible to make the liquefied ammonia in hydraulic reservoir be maintained at predetermined temperature, from
And smoothly for ammonia.
For solving above-mentioned technical problem, this utility model adopts the following technical scheme that:
A kind of low temperature is continuously for ammonia device, including liquid ammonia storage tank, also include with liquid ammonia storage tank bottom the steam heat-exchanging of laminating
Device；Vapor heat exchanger includes the steam union of equal camber and condenses water union, also includes some tubulations, and one end of tubulation is even
Logical steam union, other end connection condenses water union；Steam union is provided with steam inlet, is provided with hydrophobic below condensation water union
Valve group.It is to enable vapor heat exchanger and liquid ammonia storage tank to keep laminating that steam union and condensation water union are designed to arc,
Thus realize efficient heat transfer.
Aforesaid a kind of low temperature is continuously in ammonia device, and steam inlet is positioned at the one end in steam union away from ground, solidifying
Bearing water union and be provided with drain port near the one end on ground, drain port connects with drain valve group.
Aforesaid a kind of low temperature is continuously in ammonia device, and liquid ammonia storage tank is provided with temperature measurer, the pipeline of steam inlet upstream
It is provided with regulation valve group, temperature measurer and regulation valve group electrical connection.Regulation valve group can be according to the liquefied ammonia temperature be given of temperature measurer
Feedback, flexible valve opening, regulate steam delivery volume, so that liquid temperature maintains certain limit in liquid ammonia storage tank, can
Keep certain vapour pressure to make ammoniacal liquor flow into downstream unit (such as liquid ammonia evaporator) smoothly, also avoid liquefied ammonia temperature too high thus lead
Cause steam too much to consume and ammonia tank superpressure.
Aforesaid a kind of low temperature, continuously in ammonia device, also includes fin, and fin connects adjacent tubulation.By design fin
Sheet can reduce tubulation quantity and the length of vapor heat exchanger, reduces steam consumption quantity.
Aforesaid a kind of low temperature in ammonia device, also includes heat-insulation layer, heat-insulation layer cladding liquid ammonia storage tank, steam heat-exchanging continuously
Device is positioned at heat-insulation layer.Heat-insulation layer is dismountable to be arranged on liquid ammonia storage tank, when temperature is higher, it is not necessary to during heat tracing, can will protect
Temperature layer unloads.
In order to improve the laminating degree of vapor heat exchanger and liquid ammonia storage tank, steam union and condense water union all and liquid ammonia storage tank
Sidewall be arranged concentrically, and curvature is identical.Laminating degree is the highest, and the efficiency of heat transfer is the highest.
The angle corresponding in order to avoid the unnecessary wasting of resources, steam union and the camber line condensing water union is equal, and
More than or equal to 45 degree, less than or etc. 90 degree, make vapor heat exchanger be unlikely to owing to steam deficiency causes temperature too low not
Anticipated heats can be realized.
Aforesaid a kind of low temperature is continuously in ammonia device, and steam union joins by some arcs being connected with condensing water union
Pipe forms, and is connected by flange between adjacent arc union, whole vapor heat exchanger can be split as two parts with convenient
On-the-spot dismounting.
Compared with prior art, this utility model is applicable to stably supply ammonia device the winter of severe cold area, and this device is direct
It is arranged in outside ammonia tank, uses this utility model the liquefied ammonia in liquid ammonia storage tank can be maintained 0～8 degree, by heating ammonia tank
And maintaining certain liquid temperature stable for ammonia to ensure, it is not necessary to transformation ammonia tank, liquefied ammonia and gas ammonia pipeline, it is convenient to implement, and invests and runs
Expense is relatively low.On the premise of not using liquefied ammonia transfer pump, just can ensure liquid when extraneous extremely low temperature (less than subzero 10 DEG C)
Ammonia can be directly entered liquid ammonia evaporator from liquid ammonia storage tank, then by liquid ammonia evaporator re-evaporation.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of the present utility model；
Fig. 2 is the sectional view of a kind of embodiment of the present utility model；
Fig. 3 is the structural representation of a kind of embodiment of vapor heat exchanger；
Fig. 4 is the structural representation of the another kind of embodiment of vapor heat exchanger.
Reference: 1-heat-insulation layer, 2-liquid ammonia storage tank, 3-temperature measurer, 4-regulates valve group, and 5-vapor heat exchanger, 6-is hydrophobic
Valve group, 7-condenses water union, 8-tubulation, 9-steam union, 10-fin, 11-steam inlet, 12-drain port.
With detailed description of the invention, this utility model is further described below in conjunction with the accompanying drawings.
Detailed description of the invention
Embodiment 1 of the present utility model: as shown in Figure 1, Figure 2 and Figure 3, a kind of low temperature is continuously for ammonia device, including liquefied ammonia
Storage tank 2, also include with liquid ammonia storage tank 2 bottom laminating vapor heat exchanger 5；Vapor heat exchanger 5 includes the steam connection of equal camber
Pipe 9 and condensation water union 7, also include some tubulations 8, and one end connection steam union 9 of tubulation 8, other end connection condenses water
Union 7；Steam union 9 is provided with steam inlet 11, condenses and is provided with drain valve group 6 below water union 7.
Steam inlet 11 is positioned at the one end in steam union 9 away from ground, condenses water union 7 and is provided with near the one end on ground
Drain port 12, drain port 12 connects with drain valve group 6.Liquid ammonia storage tank 2 is provided with temperature measurer 3, the pipeline of steam inlet 11 upstream
It is provided with regulation valve group 4, temperature measurer 3 and regulation valve group 4 to electrically connect.Also include that heat-insulation layer 1, heat-insulation layer 1 are coated with liquid ammonia storage tank 2,
Vapor heat exchanger 5 is positioned at heat-insulation layer 1, and heat-insulation layer 1 is detachably arranged on liquid ammonia storage tank 2.
Steam union 9 is arranged concentrically with condensing the water union 7 sidewall all with liquid ammonia storage tank 2, and curvature is identical.Steam union
9 is equal with angle corresponding to camber line condensing water union 7, and more than or equal to 45 degree, be less than or etc. 90 degree.Steam union
9 form by some arc unions being connected with condensing water union 7, are connected by flange between adjacent arc union.
Embodiment 2: as shown in Figure 1, Figure 2 and Figure 4, a kind of low temperature, continuously for ammonia device, including liquid ammonia storage tank 2, also includes
With the vapor heat exchanger 5 of laminating bottom liquid ammonia storage tank 2；Vapor heat exchanger 5 includes the steam union 9 of equal camber and condenses water connection
Pipe 7, also includes some tubulations 8, and one end connection steam union 9 of tubulation 8, other end connection condenses water union 7；Steam union
9 are provided with steam inlet 11, condense and are provided with drain valve group 6 below water union 7.
Steam inlet 11 is positioned at the one end in steam union 9 away from ground, condenses water union 7 and is provided with near the one end on ground
Drain port 12, drain port 12 connects with drain valve group 6.Liquid ammonia storage tank 2 is provided with temperature measurer 3, the pipeline of steam inlet 11 upstream
It is provided with regulation valve group 4, temperature measurer 3 and regulation valve group 4 to electrically connect.Also include that fin 10, fin 10 connect adjacent tubulation 8,
The heat transfer speed of vapor heat exchanger 5 can be improved by arranging fin 10, make vapor heat exchanger 5 be heated evenly, heat up faster.
Also including that heat-insulation layer 1, heat-insulation layer 1 are coated with liquid ammonia storage tank 2, vapor heat exchanger 5 is positioned at heat-insulation layer 1, the dismountable peace of heat-insulation layer 1
It is contained on liquid ammonia storage tank 2.
Steam union 9 is arranged concentrically with condensing the water union 7 sidewall all with liquid ammonia storage tank 2, and curvature is identical.Steam union
9 is equal with angle corresponding to camber line condensing water union 7, and more than or equal to 45 degree, be less than or etc. 90 degree.Steam union
9 form by some arc unions being connected with condensing water union 7, are connected by flange between adjacent arc union.
Claims (8)
1. low temperature is continuously for an ammonia device, including liquid ammonia storage tank (2), it is characterised in that also include and liquid ammonia storage tank (2) bottom
The vapor heat exchanger (5) of laminating；Vapor heat exchanger (5) includes the steam union (9) of equal camber and condenses water union (7), also
Including some tubulations (8), one end connection steam union (9) of tubulation (8), other end connection condenses water union (7)；Steam joins
Pipe (9) is provided with steam inlet (11), condenses water union (7) lower section and is provided with drain valve group (6).
A kind of low temperature the most according to claim 1 is continuously for ammonia device, it is characterised in that steam inlet (11) is positioned at steam
Away from the one end on ground in union (9), condense water union (7) and be provided with drain port (12), drain port (12) near the one end on ground
Connect with drain valve group (6).
A kind of low temperature the most according to claim 2 is continuously for ammonia device, it is characterised in that liquid ammonia storage tank (2) is provided with survey
Wen Yi (3), the pipeline of steam inlet (11) upstream is provided with regulation valve group (4), temperature measurer (3) and regulation valve group (4) electrical connection.
4. according to a kind of low temperature described in Claims 2 or 3 continuously for ammonia device, it is characterised in that also include fin (10), fin
Sheet (10) connects adjacent tubulation (8).
A kind of low temperature the most according to claim 4 is continuously for ammonia device, it is characterised in that also include heat-insulation layer (1), insulation
Layer (1) cladding liquid ammonia storage tank (2), vapor heat exchanger (5) is positioned at heat-insulation layer (1), and heat-insulation layer (1) is detachably arranged in liquefied ammonia
On storage tank (2).
A kind of low temperature the most according to claim 5 is continuously for ammonia device, it is characterised in that steam union (9) and condensation water
Union (7) all sidewalls with liquid ammonia storage tank (2) are arranged concentrically, and curvature is identical.
A kind of low temperature the most according to claim 6 is continuously for ammonia device, it is characterised in that steam union (9) and condensation water
The angle that the camber line of union (7) is corresponding is equal, and more than or equal to 45 degree, be less than or etc. 90 degree.
A kind of low temperature the most according to claim 7 is continuously for ammonia device, it is characterised in that steam union (9) and condensation water
Union (7), by some connected arc union compositions, is connected by flange between adjacent arc union.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620658447.2U CN205781964U (en) | 2016-06-28 | 2016-06-28 | A kind of low temperature is continuously for ammonia device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620658447.2U CN205781964U (en) | 2016-06-28 | 2016-06-28 | A kind of low temperature is continuously for ammonia device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205781964U true CN205781964U (en) | 2016-12-07 |
Family
ID=58128582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620658447.2U Active CN205781964U (en) | 2016-06-28 | 2016-06-28 | A kind of low temperature is continuously for ammonia device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205781964U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105953070A (en) * | 2016-06-28 | 2016-09-21 | 中国华电科工集团有限公司 | Low-temperature continuous ammonia supply device |
-
2016
- 2016-06-28 CN CN201620658447.2U patent/CN205781964U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105953070A (en) * | 2016-06-28 | 2016-09-21 | 中国华电科工集团有限公司 | Low-temperature continuous ammonia supply device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104048161B (en) | A kind of combined vaporizing device of liquified natural gas (LNG) | |
| CN103691260B (en) | Heat recovery water-saving system for desulfuration by wet process and process thereof | |
| CN107917089A (en) | Water circulating pump pumps leaf aperture optimal regulation method | |
| CN108895858A (en) | A kind of boiler arranges the exhaust steam residual heat recycling system and recoverying and utilizing method of flash vessel surely | |
| CN205781964U (en) | A kind of low temperature is continuously for ammonia device | |
| CN105953070A (en) | Low-temperature continuous ammonia supply device | |
| CN201496770U (en) | Heat exchanging system for industrial gas production | |
| KR20180016704A (en) | Liquefied natural gas open rack vaporizer | |
| CN108998063A (en) | Energy conservation and environmental protection cooling technique and device before a kind of asphalt moulding | |
| CN207108543U (en) | The deaerating type of cycles of boiler feedwater | |
| CN205641143U (en) | Heat transfer system and be equipped with this heat transfer system's heating system | |
| CN211373282U (en) | Steam condensate gas recovery device | |
| CN209214402U (en) | A kind of air-Cooling circulating water system | |
| CN208536645U (en) | A kind of boiler arranges the exhaust steam residual heat recycling system of flash vessel surely | |
| CN104677133B (en) | A kind of exhaust system and indirect air cooling system | |
| CN209065839U (en) | A kind of natural gas compressing recycling and processing device | |
| CN203671581U (en) | Cavitation prevention device of boiler feed pump | |
| CN207960693U (en) | A kind of steam heat-exchanging recovery system of steam turbine oil sealing | |
| CN210512793U (en) | Air compressor machine waste heat recovery intelligent management system | |
| CN208886748U (en) | A kind of reclamation of condensate water reuse means | |
| CN209431389U (en) | A kind of waste incineration and generating electricity heat energy recycling system of air compressor | |
| CN208398056U (en) | Energy saving dead steam recovery system suitable for boiler deoxidizing method | |
| CN208419663U (en) | A kind of device for recycling condensed water | |
| CN204610305U (en) | Latent liquid type low-temperature centrifugal pump | |
| CN201840326U (en) | Stepping type water boiling machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |