CN204854420U - Urea solution hydrolysises and makes ammonia reactor export heat exchanger - Google Patents
Urea solution hydrolysises and makes ammonia reactor export heat exchanger Download PDFInfo
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- CN204854420U CN204854420U CN201520524283.XU CN201520524283U CN204854420U CN 204854420 U CN204854420 U CN 204854420U CN 201520524283 U CN201520524283 U CN 201520524283U CN 204854420 U CN204854420 U CN 204854420U
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- heating
- working medium
- heating tube
- heat exchanger
- interior
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Abstract
The utility model relates to an urea solution hydrolysises and makes ammonia reactor export heat exchanger, overlap the outer heating tube who establishes, interior heating tube and central heating pipe in proper order including outside -in, the one end and the intercommunication of the intermediate layer between outer heating tube and the interior heating tube of center heating pipe, the other end sets up heating working medium entry along radially extending to outer heating tube outside, the heating of flowing of working medium is used for being heated in the interior heating tube, intermediate layer between outer heating tube and the interior heating tube to and be used for the mobile heat supply of heater matter in the central heating pipe, be provided with heating working medium outlet on the outer heating tube. Through making heating working medium at first get into central heating pipe, got into the intermediate layer by the working medium after heat, heat exchanger entering hydrolysis reactor heating pipe set is left to the heating working medium of accomplishing the heat transfer, provides the heat for hydrolysis reaction. Hydrolysis reaction product gas is flow through by the intermediate level of triple sleeve pipe heaters, under central heating pipe and interior heating tube's heat transfer effect, realizes the promotion of temperature in short distance.
Description
Technical field
The utility model belongs to hydrolysis of urea Ammonia Production Processes Based field in flue gas denitrification system, is specifically related to a kind of urea liquid hydrolysis ammonia reactor outlet processed heat exchanger.
Background technology
The coal burning of coal-fired power plant is along with a large amount of nitrogen oxide (NO
x) discharge, air is polluted.Usually take to add equipment for denitrifying flue gas at boiler tail, utilize selective catalytic reduction (SCR) to remove NO in flue gas
x, be translated into nontoxic nitrogen (N
2) and water (H
2thus reach emission request O).Denitrification reducing agent ammonia (NH required in selective catalytic reduction
3) usually there are three kinds of supply forms: liquefied ammonia, ammoniacal liquor and urea.Wherein, liquefied ammonia and ammoniacal liquor belong to hazardous chemical.There are strict legal provisions in country relating in the storage of liquefied ammonia and ammoniacal liquor, use and transportation.And industrial urea is white crystals body particle, do not belong to hazardous chemical category, be convenient to store and transport, potential safety hazard can not be caused because leaking, therefore consider from safety and economy angle, urea ammonia is subject to people's favor gradually, by the supply adopting urea liquid Hydrolyze method to realize ammonia.
Hydrolysis of urea reactor product gas composition is NH
3and CO
2and steam, the ratio of each composition is determined by feed urea concentration, when feed urea concentration is 50%, and gas product volume composition: NH
3: 37.5%; CO
2: 18.75%; H
2o:43.75%.The operating pressure of usual hydrolysis reactor is 0.7MPa, running temperature 145 DEG C, and under this pressure condition, when product temperature degree is lower than 133 DEG C, steam Hui Ning can occur; When temperature is lower than 85 DEG C, NH
3and CO
2there is back reaction and generate crystallized ammonium carbamate.Above operating mode all affects safety in production, therefore in product gas course of conveying, needs feed-line to do tracing thermal-insulating, controls delivery temperature and is not less than 150 DEG C.
Existing heat exchangers adopts jacketed type exchanger, and wherein jacket pipe is internal and external double-layer, inner sleeve transferring working medium, and outer tube is for being full of companion hot working fluid space.Jacket pipe is to accompany for the purpose of heat, and therefore in tracing steam and inner sleeve, the heat exchange of working medium is less, and therefore heat exchanging area requirements is not high.But hydrolysis reactor outlet heater needs in shorter conveying space, realize the temperature increase of gas product, therefore higher requirement is amassed to heater surface, existing heat exchanger cannot meet the demands, and simultaneously in order to obtain ideal and heat transfer effect fast, its structure is complexity all comparatively, take up room large, especially longer distance is needed, and the less stable of work, safeguard complicated.
Utility model content
For problems of the prior art, the utility model provides a kind of structure simple, is easy to processing, the urea liquid hydrolysis ammonia reactor outlet processed heat exchanger that heat exchange efficiency is high.
The utility model is achieved through the following technical solutions:
A kind of urea liquid hydrolysis ammonia reactor outlet processed heat exchanger, comprises the external heat sleeve pipe that ecto-entad is sheathed successively, interior heating muff and central heating tube; One end of central heating tube is communicated with the interlayer between external heat sleeve pipe and interior heating muff, and the other end radially extends to external heat jacket exterior and arranges heating working medium entrance; For being heated by the flowing of heating working medium in interior heating muff; Interlayer between external heat sleeve pipe and interior heating muff, and for the flowing heat supply of heating working medium in central heating tube; External heat sleeve pipe is provided with heating working medium outlet.
Preferably, the outer wall of central heating tube sleeve pipe arranges some fins vertically.
Preferably, central heating tube sleeve pipe helically coil pipe setting.
Preferably, the external heat sleeve pipe that ecto-entad is sheathed successively, interior heating muff and central heating tube are coaxially arranged.
Preferably, the axis of heating working medium entrance and heating working medium outlet is positioned on the same cross section of external heat sleeve pipe.
Further, heating working medium entrance and heating working medium outlet are near being arranged by heating working medium entrance.
Preferably, interior heating muff two ends are respectively arranged with the flange be connected with system pipeline.
Compared with prior art, the utility model has following useful technique effect:
Heat exchanger described in the utility model, makes heating working medium first enter central heating tube, and enter interlayer from central heating tube heating working medium out, the heating working medium completing heat exchange leaves heat exchanger and enters hydrolysis reactor heating tube bundle, for hydrolysis provides heat.Hydrolysis gas product is flow through by the intermediate layer of triple tube heater, under the heat exchange effect of central heating tube and interior heating muff, realizes the lifting of temperature, take full advantage of the heat of heating working medium in shorter distance; Not only structure is simple, easy to use, and it is little to take up room, and is easy to processing and safeguards.
Further, by adopting the setting of fin or helically coil pipe, the heat exchange area that high temperature goes can be increased, improving heat exchange efficiency.
Further, by coaxial setting, evenly carrying out of heat exchange can be ensured, and each working medium is in the equilibrium of diverse location place pressure and unification; The safety and stability of use is ensure that while improving heat exchange efficiency.
Further, the heat exchange process that can extend heating working medium is set by the homonymy of heating working medium gateway, improves space efficiency utilization; It being exchanged the temperature difference near being arranged by heating working medium entrance to strengthen simultaneously, having better met the efficiency of heat exchange.
Accompanying drawing explanation
Fig. 1 is the structural representation described in the utility model example.
Fig. 2 is the structural representation being provided with fin described in the utility model example.
Fig. 3 is the profile at A_A place in Fig. 2.
In figure: external heat sleeve pipe 1, interior heating muff 2, central heating tube 3, heating working medium entrance 4, heating working medium outlet 5, fin 6, flange 7.
Detailed description of the invention
Below in conjunction with specific embodiment, the utility model is described in further detail, described in be to explanation of the present utility model instead of restriction.
A kind of urea liquid of the utility model hydrolysis ammonia reactor outlet processed heat exchanger, as shown in Figure 1, comprises the external heat sleeve pipe 1 that ecto-entad is sheathed successively, interior heating muff 2 and central heating tube 3; One end of central heating tube 3 is communicated with the interlayer between external heat sleeve pipe 1 and interior heating muff 2, and the other end radially extends to external heat sleeve pipe 1 outer setting heating working medium entrance 4; For being heated by the flowing of heating working medium in interior heating muff 2; Interlayer between external heat sleeve pipe 1 and interior heating muff 2, and for the flowing heat supply of heating working medium in central heating tube 3; External heat sleeve pipe 1 is provided with heating working medium outlet 5.
In this preferred embodiment as shown in Figure 2, the outer wall of central heating tube sleeve pipe 3 arranges some fins 6 vertically, adds heat exchange area; Or by central heating tube sleeve pipe 3 helically coil pipe setting.Wherein, the external heat sleeve pipe 1 that ecto-entad is sheathed successively, interior heating muff 2 and central heating tube 3 are in coaxially arranged.And in this preferred embodiment, the axis of heating working medium entrance 4 and heating working medium outlet 5 is positioned on the same cross section of external heat sleeve pipe 1; And heating working medium entrance 4 and heating working medium are exported 5 near being arranged by heating working medium entrance, improve the Distance geometry action effect of heat exchange.The flange 7 arranged respectively by interior heating muff 2 two ends is connected with system pipeline.
Heater described in the utility model is connected by flange 7 with system pipeline.This preferred embodiment is described for heating steam as heating working medium.As shown in Figure 1, when carrying out work, first heating steam enters central heating tube 3 by heating working medium entrance 4, enter in the chuck between external heat sleeve pipe 1 and interior heating muff 2 from central heating tube 3 steam out, the steam completing heat exchange leaves heat exchanger by heating steam outlet 5 and enters hydrolysis reactor heating tube bundle, for hydrolysis provides heat.
By heating working medium, this preferred embodiment is described for hydrolysis gas product, flow through by internal layer heating muff 2, namely flow through from the intermediate layer between internal layer heating muff 2 and central heating tube 3, under the heat exchange effect of central heating tube 3 and inner heating tube 2, in shorter distance, realize the lifting of temperature, gas product flows out from by heating working medium outlet.
In the middle of whole process, heating working medium carries out circulating and heat release fully in limited space, and defines center heating, the heat exchange structure of outer insulation, and not only heat exchange is uniform and stable, and exchange velocity is fast, temperature supply and adjustment balance; Well meet the requirement of gas product heat exchanger.
Claims (7)
1. a urea liquid hydrolysis ammonia reactor outlet processed heat exchanger, is characterized in that, comprise the external heat sleeve pipe (1) that ecto-entad is sheathed successively, interior heating muff (2) and central heating tube (3); One end of central heating tube (3) is communicated with the interlayer between external heat sleeve pipe (1) and interior heating muff (2), and the other end radially extends to external heat sleeve pipe (1) outer setting heating working medium entrance (4); For being heated by the flowing of heating working medium in interior heating muff (2); Interlayer between external heat sleeve pipe (1) and interior heating muff (2), and for the flowing heat supply of heating working medium in central heating tube (3); External heat sleeve pipe (1) is provided with heating working medium outlet (5).
2. a kind of urea liquid hydrolysis according to claim 1 ammonia reactor outlet processed heat exchanger, is characterized in that, the outer wall of described central heating tube (3) arranges some fins (6) vertically.
3. a kind of urea liquid hydrolysis according to claim 1 ammonia reactor outlet processed heat exchanger, it is characterized in that, described central heating tube (3) helically coil pipe is arranged.
4. a kind of urea liquid hydrolysis according to claim 1 ammonia reactor outlet processed heat exchanger, it is characterized in that, the external heat sleeve pipe (1) that ecto-entad is sheathed successively, interior heating muff (2) and central heating tube (3) are in coaxially arranged.
5. a kind of urea liquid hydrolysis according to claim 1 ammonia reactor outlet processed heat exchanger, it is characterized in that, the axis of heating working medium entrance (4) and heating working medium outlet (5) is positioned on the same cross section of external heat sleeve pipe (1).
6. a kind of urea liquid hydrolysis according to claim 5 ammonia reactor outlet processed heat exchanger, it is characterized in that, heating working medium entrance (4) and heating working medium outlet (5) are near being arranged by heating working medium entrance.
7. a kind of urea liquid hydrolysis according to claim 1 ammonia reactor outlet processed heat exchanger, it is characterized in that, interior heating muff (2) two ends are respectively arranged with the flange (7) be connected with system pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520524283.XU CN204854420U (en) | 2015-07-17 | 2015-07-17 | Urea solution hydrolysises and makes ammonia reactor export heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520524283.XU CN204854420U (en) | 2015-07-17 | 2015-07-17 | Urea solution hydrolysises and makes ammonia reactor export heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204854420U true CN204854420U (en) | 2015-12-09 |
Family
ID=54744960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520524283.XU Expired - Fee Related CN204854420U (en) | 2015-07-17 | 2015-07-17 | Urea solution hydrolysises and makes ammonia reactor export heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204854420U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004201A (en) * | 2015-07-17 | 2015-10-28 | 中国华能集团公司 | Urea solution hydrolysis ammonia producing reactor outlet heat exchanger |
| CN110118435A (en) * | 2019-05-05 | 2019-08-13 | 四川奥格莱能源科技有限公司 | A kind of heat exchanger of wall-hanging boiler |
-
2015
- 2015-07-17 CN CN201520524283.XU patent/CN204854420U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004201A (en) * | 2015-07-17 | 2015-10-28 | 中国华能集团公司 | Urea solution hydrolysis ammonia producing reactor outlet heat exchanger |
| CN110118435A (en) * | 2019-05-05 | 2019-08-13 | 四川奥格莱能源科技有限公司 | A kind of heat exchanger of wall-hanging boiler |
| CN110118435B (en) * | 2019-05-05 | 2021-10-29 | 四川奥格莱能源科技有限公司 | Wall-hanging stove heat exchanger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151209 Termination date: 20170717 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |