CN207142841U - Denitration hydrolyzes ammonia reaction tower with tower urea seeding - Google Patents
Denitration hydrolyzes ammonia reaction tower with tower urea seeding Download PDFInfo
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- CN207142841U CN207142841U CN201720818522.1U CN201720818522U CN207142841U CN 207142841 U CN207142841 U CN 207142841U CN 201720818522 U CN201720818522 U CN 201720818522U CN 207142841 U CN207142841 U CN 207142841U
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- tower
- urea
- liquid
- heater
- rectifying column
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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
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
It the utility model is related to a kind of denitration and hydrolyze ammonia reaction tower with tower urea seeding, including tower body, tower body top is provided with rectifying column, condenser is provided with rectifying column, tower body bottom is provided with heater, liquid distribution device is provided with rectifying column, liquid distribution device includes urea liquid import, urea liquid import is connected with main infusion tube, and main infusion tube is connected with some distributor pipes, and liquid distributing hole is offered on distributor pipe.The beneficial effects of the utility model are：Urea liquid enters in tower in the middle part of reaction tower, make urea is continual to be decomposed, pass through bottom of towe heater heat exchange evaporation, overhead condensation simultaneously, make to form rectifying environment in whole tower, uninterruptedly the involatile matters such as the water in gas are condensed out, carbon dioxide and ammonia are separated from tower top and discharged, substantially increase reaction speed, and make that urea decomposition efficiency in reaction tower is higher, and raffinate concentration is lower, improve the recycling rate of waterused of ureaclastic conversion ratio and the aqueous solution.
Description
（One）Technical field
A kind of ammonia reaction tower is the utility model is related to, more particularly to a kind of denitration is anti-with tower urea seeding hydrolysis ammonia
Answer tower.
（Two）Background technology
NOXOccur as the pernicious gas in the industry industrial production such as thermoelectricity, glass-ceramic, coking, cement, to normal
Atmospheric environment has larger harm, and it can directly cause acid rain, toxicity haze.Therefore in flue gas in process units
NOXThere is larger limitation, denitration is just particularly important.In recent years, the biography that the industry such as thermoelectricity, coking, cement, glass-ceramic uses
System removing NOXMode has the methods of SNCR, SCR.These methods are required for corresponding denitrification reducing agent.
The selection of denitrification reducing agent typically considers in terms of its physical property, economy and security, main at present
There are three kinds of liquefied ammonia, ammoniacal liquor and urea.Because liquefied ammonia is hazardous chemical, as country is to the pay attention to day by day of safety and a series of
The gradual appearance of related restriction so that power plant is more next using being received during liquefied ammonia in all many-sides such as examination ＆ approval, duration, occupation of land
More restrictions, it is also relatively complicated by the program of environmental protection inspection and acceptance after putting into operation；And ammoniacal liquor is because its ammonia content is low, volume is big, transport
Inconvenience, operating cost is high and is limited to by what is applied.As non-hazardous feed for ammonia production, urea has and liquefied ammonia identical denitration
Performance, be wide variety of green fertilizer again, it is nontoxic, safe to use, thus without regulation limit, and be readily transported and
Storage.
For many years, because of improper use, casualty loss is very heavy as caused by liquefied ammonia.Thermal power plant's denitration is according to liquefied ammonia
Raw material, its usage amount is very huge, by taking a medium-sized thermal power plant as an example, takes around 10 tons of liquefied ammonia of consumption daily.There is number in the whole nation
Thousand thermal power plants, such as all run using liquefied ammonia, only this item equivalent to the liquefied ammonia tank car for there are thousands of 10 tons daily in the whole nation
Various regions, for transporting raw material, potential safety hazard can not be ignored.Current SCR (Selective Catalytic at home
Reduction, selective catalytic reduction) denitration uses urea to have become a kind of trend for reducing agent, and is increasingly becoming master
Stream, especially obtain more and more in some key areas and the city power plant nearer from residential block, urea decomposition technique for production of ammonia
Application.
For this present situation, the characteristic for successively finding both at home and abroad and make use of urea to decompose ammonia processed, with urea decomposition or water
Solution replaces liquefied ammonia to be used as denitration, but because of reasons such as technology is immature, external monopolizations, plant investment is very big, 300-350kg/h productions
The hydrolysis of urea of ammonia ability and urea pyrolysis equipment investment are in 3000-7000 ten thousand, and power consumption, water consume, steam consumption are higher, urea point
Solution reaction efficiency is low, conversion ratio is low, and structure is extremely complex, and required cost is high.
（Three）The content of the invention
The utility model is in order to make up the deficiencies in the prior art, there is provided a kind of structure processing is simple, cost-effective, reduces
Energy consumption, the denitration that safe and reliable, conversion rate of urea is high hydrolyze ammonia reaction tower with tower urea seeding.
The utility model is achieved by the following technical solution：
A kind of denitration hydrolyzes ammonia reaction tower, including tower body with tower urea seeding, it is characterized in that：The tower body top is set
There is rectifying column, condenser is provided with rectifying column, tower body bottom is provided with heater, liquid distribution device, liquid are provided with rectifying column
Distribution apparatus includes urea liquid import, and urea liquid import is connected with main infusion tube, and main infusion tube is connected with some distributions
Manage, liquid distributing hole is offered on distributor pipe.
If it is provided with dried layer packed tower in the rectifying column.
The heater sidepiece is connected with steam inlet and condensation-water drain.
The heater base is provided with catalyst layer, and heater sidepiece is connected with liquid catalyst import and solid catalyst
Entrance.
The condenser sidepiece is connected with cooling water inlet and coolant outlet.
Gas vent is provided with the top of the rectifying column.
Thermometric pressure tap is connected with below the rectifying column sidepiece and heater, heater is connected to over and under
Liquid level gauge mouth.
Raffinate outlet is connected with below the heater.
The beneficial effects of the utility model are：Urea liquid enters in tower in the middle part of the reaction tower, make urea it is continual enter
Row decomposes, and during to bottom of towe heater, urea concentration is no more than 10%, if using catalyst, can be reduced to less than 5%.Together
When by bottom of towe heater heat exchange evaporation, overhead condensation, make to form rectifying environment in whole tower, uninterruptedly water in gas etc.
Involatile matter is condensed out, and carbon dioxide and ammonia are separated from tower top and discharged.Substantially increase heat exchange the uniformity and
Reliability, equipment clogging is not susceptible to, can also be urged using liquid catalyst and using solid with being intended to not have to catalyst
Switch between three kinds of functions of agent, substantially increase reaction speed, and make urea decomposition efficiency in reaction tower higher, raffinate concentration
It is lower, the recycling rate of waterused of ureaclastic conversion ratio and the aqueous solution is improved, and device structure is simple, processing is simple, saves
Cost, energy consumption is more reduced, securely and reliably.
（Four）Brief description of the drawings
The utility model is further described below in conjunction with the accompanying drawings.
Accompanying drawing 1 is structural representation of the present utility model；
Accompanying drawing 2 is liquid distribution device structural representation of the present utility model；
Accompanying drawing 3 is distributor pipe main structure diagram of the present utility model；
Accompanying drawing 4 is distributor pipe side structure schematic view of the present utility model；
In figure, 1 tower body, 2 rectifying columns, 3 condensers, 4 heaters, 5 liquid distribution devices, 6 urea liquid imports, 7 master it is defeated
Liquid pipe, 8 distributor pipes, 9 liquid distributing holes, 10 packed towers, 11 steam inlets, 12 condensation-water drains, 13 catalyst layers, 14 liquid catalysts
Import, 15 solid catalyst entrances, 16 cooling water inlets, 17 coolant outlets, 18 gas vents, 19 thermometric pressure taps, 20 liquid
Position meter mouth, the outlet of 21 raffinates.
（Five）Embodiment
Accompanying drawing is a kind of specific embodiment of the present utility model.The embodiment includes tower body 1, and the top of tower body 1 is provided with rectifying
Tower 2, rectifying column 2 is interior to be provided with condenser 3, and the bottom of tower body 1 is provided with heater 4, liquid distribution device 5, liquid are provided with rectifying column 2
Distribution apparatus 5 includes urea liquid import 6, and urea liquid import 6 is connected with main infusion tube 7, and main infusion tube 7 is connected with some
Distributor pipe 8, liquid distributing hole 9 is offered on distributor pipe 8.If it is provided with dried layer packed tower 10 in rectifying column 2.The sidepiece of heater 4 is connected with
Steam inlet 11 and condensation-water drain 12.The bottom of heater 4 is provided with catalyst layer 13, and the sidepiece of heater 4 is connected with liquid catalyst
Agent import 14 and solid catalyst entrance 15.The sidepiece of condenser 3 is connected with cooling water inlet 16 and coolant outlet 17.Rectifying column
2 tops are provided with gas vent 18.The sidepiece of rectifying column 2 and the lower section of heater 4 are connected with thermometric pressure tap 19, the top of heater 4 and
Lower section is connected to liquid level gauge mouth 20.The lower section of heater 4 is connected with raffinate outlet 21.
Ammonia reaction tower is hydrolyzed with tower urea seeding using denitration of the present utility model, urea liquid passes through urea liquid
Import 6 enters the main infusion tube 7 of liquid distribution device 5, then uniformly falls to heater 4 by the liquid distributing hole 9 of distributor pipe 8 and enters
Row hydrolysis, the gas of generation rise to the involatile matters such as condenser 3, the continual water in gas and condensed out,
Carbon dioxide and ammonia are separated discharges from gas vent 18.Under heater 4 and catalyst action, urea raffinate concentration drop
To 10% or so, then sent out in raffinate outlet 21 outside tower body 1.
Claims (8)
1. a kind of denitration hydrolyzes ammonia reaction tower, including tower body with tower urea seeding（1）, it is characterized in that：The tower body（1）On
Portion is provided with rectifying column（2）, rectifying column（2）It is interior to be provided with condenser（3）, tower body（1）Bottom is provided with heater（4）, rectifying column（2）It is interior
Provided with liquid distribution device（5）, liquid distribution device（5）Including urea liquid import（6）, urea liquid import（6）It is defeated with master
Liquid pipe（7）It is connected, main infusion tube（7）It is connected with some distributor pipes（8）, distributor pipe（8）On offer liquid distributing hole（9）.
2. denitration according to claim 1 hydrolyzes ammonia reaction tower with tower urea seeding, it is characterized in that：The rectifying column
（2）If interior be provided with dried layer packed tower（10）.
3. denitration according to claim 1 hydrolyzes ammonia reaction tower with tower urea seeding, it is characterized in that：The heater
（4）Sidepiece is connected with steam inlet（11）And condensation-water drain（12）.
4. denitration according to claim 1 hydrolyzes ammonia reaction tower with tower urea seeding, it is characterized in that：The heater
（4）Bottom is provided with catalyst layer（13）, heater（4）Sidepiece is connected with liquid catalyst import（14）With solid catalyst entrance
（15）.
5. denitration according to claim 1 hydrolyzes ammonia reaction tower with tower urea seeding, it is characterized in that：The condenser
（3）Sidepiece is connected with cooling water inlet（16）And coolant outlet（17）.
6. denitration according to claim 1 hydrolyzes ammonia reaction tower with tower urea seeding, it is characterized in that：The rectifying column
（2）Top is provided with gas vent（18）.
7. denitration according to claim 1 hydrolyzes ammonia reaction tower with tower urea seeding, it is characterized in that：The rectifying column
（2）Sidepiece and heater（4）Lower section is connected with thermometric pressure tap（19）, heater（4）Liquid level is connected to over and under
Count mouth（20）.
8. denitration according to claim 1 hydrolyzes ammonia reaction tower with tower urea seeding, it is characterized in that：The heater
（4）Lower section is connected with raffinate outlet（21）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720818522.1U CN207142841U (en) | 2017-07-07 | 2017-07-07 | Denitration hydrolyzes ammonia reaction tower with tower urea seeding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720818522.1U CN207142841U (en) | 2017-07-07 | 2017-07-07 | Denitration hydrolyzes ammonia reaction tower with tower urea seeding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207142841U true CN207142841U (en) | 2018-03-27 |
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ID=61672434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720818522.1U Active CN207142841U (en) | 2017-07-07 | 2017-07-07 | Denitration hydrolyzes ammonia reaction tower with tower urea seeding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207142841U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109999748A (en) * | 2019-04-25 | 2019-07-12 | 中冶焦耐(大连)工程技术有限公司 | One kind, which efficiently connects, washes knockout tower and sodium phenolate solution and dephenolize fraction seperation method |
-
2017
- 2017-07-07 CN CN201720818522.1U patent/CN207142841U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109999748A (en) * | 2019-04-25 | 2019-07-12 | 中冶焦耐(大连)工程技术有限公司 | One kind, which efficiently connects, washes knockout tower and sodium phenolate solution and dephenolize fraction seperation method |
| CN109999748B (en) * | 2019-04-25 | 2023-09-15 | 中冶焦耐(大连)工程技术有限公司 | High-efficiency continuous washing separation tower and sodium phenolate solution and dephenolized fraction separation method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Building 103-3, building 15, Qilu cultural and creative base, No.101, Shunfeng Road, Jinan area, China (Shandong) pilot Free Trade Zone, Jinan City, Shandong Province Patentee after: Shandong AoMiao Technology Development Co., Ltd Address before: High tech Zone Xinyu South Road Ji'nan city Shandong province 250101 first Qilu Software Park building three Room 308 Patentee before: SHANDONG AONENG ELECTRIC POWER SCIENCE & TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address |