CN107840353B - Urea hydrolysis reactor - Google Patents
Urea hydrolysis reactor Download PDFInfo
- Publication number
- CN107840353B CN107840353B CN201711363139.2A CN201711363139A CN107840353B CN 107840353 B CN107840353 B CN 107840353B CN 201711363139 A CN201711363139 A CN 201711363139A CN 107840353 B CN107840353 B CN 107840353B
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- Prior art keywords
- heating chamber
- main
- auxiliary
- gas
- heater
- Prior art date
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000004202 carbamide Substances 0.000 title claims abstract description 40
- 238000006460 hydrolysis reaction Methods 0.000 title claims abstract description 40
- 230000007062 hydrolysis Effects 0.000 title claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 70
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 238000005192 partition Methods 0.000 claims abstract description 4
- 239000012752 auxiliary agent Substances 0.000 claims description 27
- 239000007921 spray Substances 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 37
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 239000001569 carbon dioxide Substances 0.000 description 5
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 239000006260 foam Substances 0.000 description 3
- 238000000197 pyrolysis Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- PPBAJDRXASKAGH-UHFFFAOYSA-N azane;urea Chemical compound N.NC(N)=O PPBAJDRXASKAGH-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/08—Preparation of ammonia from nitrogenous organic substances
- C01C1/086—Preparation of ammonia from nitrogenous organic substances from urea
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a urea hydrolysis reactor, which comprises a main reaction container, a main heater, an auxiliary heater and a gas collector, wherein the main reaction container is provided with an internal partition plate for dividing the main reaction container into a main heating chamber and an auxiliary heating chamber, the main heating chamber and the auxiliary heating chamber are respectively provided with a urea liquid inlet and a liquid outlet, and the bottoms of the main heating chamber and the auxiliary heating chamber are not communicated and the tops of the main heating chamber and the auxiliary heating chamber are communicated. The invention has the unique designs of the heater and the gas collector, can flexibly select the size of the reactor according to specific hydrolysis requirements, is beneficial to saving energy, has good gas-liquid separation effect of gas collection, more sufficient urea hydrolysis and high hydrolysis efficiency, and is suitable for popularization and application.
Description
Technical Field
The invention relates to the technical field of urea hydrolysis mechanical equipment, in particular to a urea hydrolysis reactor which is novel in structural design, full in urea hydrolysis and good in gas drying effect.
Background
Currently, factors that affect urea hydrolysis include temperature, initial concentration of water in the solution, urea content, ammonia gas content in the solution, carbon dioxide content in the solution, catalyst, and the like. At higher reaction temperature, if enough reaction time is ensured, ammonia and carbon dioxide generated by hydrolysis are timely removed, and urea in the solution can be basically completely hydrolyzed. At present, ammonia is often prepared by a urea hydrolysis method, and the urea ammonia preparation process comprises urea hydrolysis and urea pyrolysis. Urea hydrolysis and urea pyrolysis processes have different chemical processes due to different temperature and pressure conditions. The hydrolysis technology has certain superiority over the pyrolysis technology, and particularly has great superiority in the aspect of oil consumption. However, the existing urea hydrolysis reactor still has some defects in the designs of additive addition, gas collection, heater and the like, and has single function, so that improvement is needed.
Disclosure of Invention
In order to solve the technical problems, the invention provides the urea hydrolysis reactor which has the unique design of the heater and the gas collector, can flexibly select the size of the reactor according to specific hydrolysis requirements, is beneficial to saving energy, has good gas-liquid separation effect of gas collection, is more sufficient in urea hydrolysis, has high hydrolysis efficiency, and is suitable for popularization and application.
In order to realize the technical scheme, the invention adopts the following technical scheme:
A urea hydrolysis reactor, characterized by: the device comprises a main reaction container, a main heater, an auxiliary heater and a gas collector, wherein the main reaction container is provided with an internal partition plate for dividing the main reaction container into a main heating chamber and an auxiliary heating chamber, the main heating chamber and the auxiliary heating chamber are respectively provided with a urea liquid inlet and a liquid outlet, and the bottoms of the main heating chamber and the auxiliary heating chamber are not communicated and the tops of the main heating chamber and the auxiliary heating chamber are communicated; the main heater and the auxiliary heater are respectively used for heating the main heating chamber and the auxiliary heating chamber; the gas collector is communicated with the inside of the main heating chamber and the auxiliary heating chamber and is used for collecting gas generated in the heating process of urea solution.
Preferably, the main heater and the auxiliary heater are respectively provided with a heating pipe, a steam inlet, a steam outlet and an auxiliary agent input bent pipe, and the auxiliary agent input bent pipe is used for adding reaction auxiliary agent into the main heating chamber or the auxiliary heating chamber; the auxiliary agent preheating device is characterized in that a steam pipeline is coaxially arranged outside the auxiliary agent input bent pipe and used for heating the auxiliary agent in the auxiliary agent input bent pipe, and the steam pipeline is provided with an auxiliary agent preheating steam inlet and an auxiliary agent preheating steam outlet.
Preferably, the heating pipes are all U-shaped heating pipes.
Preferably, the gas collector comprises a gas connecting pipe, a silk screen demister and a spraying assembly, the bottom end of the gas connecting pipe is communicated with the main reaction container, the silk screen demister is installed inside the gas connecting pipe, the spraying assembly comprises a connecting pipe, a three-way pipe, a demisting connecting pipe and a demisting spray head, the two ends of the connecting pipe are connected with the top end of the gas connecting pipe and the opening I of the three-way pipe, the opening II and the opening III of the three-way pipe are respectively used as a gas output port and a spraying connecting pipe input port, and the demisting spray head is installed at the bottom of the demisting connecting pipe.
Preferably, the side walls of the connecting pipe and the three-way pipe are of a double-layer structure provided with an inner cavity, and the inner cavity is provided with a steam inlet for gas drying and a steam outlet for gas drying.
Preferably, a plurality of observation windows are arranged on the side wall of the main reaction vessel.
When the urea hydrolysis reactor is used, urea solution with a preset temperature value before hydrolysis is pressurized by adopting a urea solution pump and then is sent into the urea hydrolysis reactor for decomposition, saturated steam is heated by a main heater or an auxiliary heater through a heating pipe to heat a corresponding main heating chamber or an auxiliary heating chamber, the steam and the urea solution are not mixed, the pressure of a gas-liquid two-phase balance system is about 1.4-2.1 MPa, and the temperature is about 150 ℃ and the heater is used. The auxiliary agent input elbow is provided with a steam heating design, so that the auxiliary agent can be preheated and part of water can be evaporated, and the hydrolysis reaction rate is improved. The low temperature saturated steam exiting the hydrolysis main reactor can be used to preheat the urea solution prior to entering the hydrolysis reactor. And a gas collector at the top of the hydrolyzer reactor collects the generated mixed gas of ammonia, carbon dioxide and water vapor, and outputs dry mixed gas of ammonia and carbon dioxide by a steam indirect heating method. The design of the spraying component can effectively prevent dirt from blocking the silk screen demister, so that the gas collection is smoother, and the urea hydrolysis is more sufficient.
Due to the adoption of the technical scheme, the invention has the following technical effects: the invention has the unique designs of the heater and the gas collector, can flexibly select the size of the reactor according to specific hydrolysis requirements, is beneficial to saving energy, has good gas-liquid separation effect of gas collection, more sufficient urea hydrolysis and high hydrolysis efficiency, and is suitable for popularization and application.
Drawings
The invention will now be described by way of example and with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the main heater of FIG. 1;
FIG. 3 is a schematic view of the structure in the direction A-A in FIG. 2;
FIG. 4 is a schematic view of the main heater of FIG. 1;
FIG. 5 is a schematic view of the structure in the direction B-B in FIG. 4;
fig. 6 is a schematic view of the structure of the gas collector in fig. 1.
Detailed Description
All of the features disclosed in this specification, all of the methods and steps in the process disclosed, except for mutually exclusive features and steps, may be combined in any manner.
Any feature disclosed in this specification may be replaced by alternative features serving the same or equivalent purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.
A urea hydrolysis reactor as shown in fig. 1 to 6, comprising a main reaction vessel 1, a main heater 2, an auxiliary heater 3 and a gas collector 4, wherein the main reaction vessel 1 is provided with an internal partition 5 for partitioning the main reaction vessel 1 into a main heating chamber 11 and an auxiliary heating chamber 12, the main heating chamber 11 and the auxiliary heating chamber 12 are respectively provided with a urea liquid inlet 6 and a liquid outlet 7, and the bottoms of the main heating chamber 11 and the auxiliary heating chamber 12 are not communicated with each other and the tops thereof are communicated with each other. The main heater 2 and the auxiliary heater 3 are used for heating the main heating chamber 11 and the auxiliary heating chamber 12, respectively; the gas collector 4 is arranged at the top of the main reactor and is communicated with the interiors of the main heating chamber 11 and the auxiliary heating chamber 12, and is used for collecting gas generated in the hydrolysis process of urea solution. When the device is used, the main heating chamber, the auxiliary heating chamber or the whole reactor can be determined and selected as a reaction container according to the hydrolysis amount of urea, so that energy sources can be saved, and the hydrolysis efficiency can be improved.
As shown in fig. 1 to 5, in the present embodiment, the main heater 2 and the sub heater 3 are each provided with a U-shaped heating pipe 21; 31. a steam inlet 22; 32. a steam outlet 23; 33. an auxiliary agent input elbow 24;34, auxiliary agent input elbow 24;34 for adding a reaction auxiliary agent to the main heating chamber 11 or the auxiliary heating chamber 12, wherein the auxiliary agent is fed into the elbow 24;34 are coaxially provided with a steam pipeline 25;35, steam line 25;35 for feeding auxiliary agent into the elbow 24;34, heating the auxiliary agent in the water heater, and evaporating redundant water while preheating the auxiliary agent, and a steam pipeline 25;35 is provided with a steam inlet 251 for preheating the auxiliary agent; 351 and an auxiliary preheating steam outlet 252;352, auxiliary preheating steam outlet 252;352 for outputting condensed water.
As shown in fig. 6, in this embodiment, the gas collector 4 includes a gas connection pipe 41, a wire mesh foam remover 42 and a spray assembly 43, the bottom end of the gas connection pipe 41 is communicated with the main reaction vessel 1, the wire mesh foam remover 42 is installed inside the gas connection pipe 41, and the wire mesh foam remover can be composed of multiple layers of stacked metal filter screens. The spray assembly 43 comprises a connecting pipe 431, a three-way pipe 432, a demisting connecting pipe 433 and a demisting spray nozzle 434, wherein two ends of the connecting pipe 431 are connected with the top end of the gas connecting pipe 41 and the opening I of the three-way pipe 432, the opening II and the opening III of the three-way pipe 432 are respectively used as a gas output port 44 and a spray connecting pipe input port 45, the demisting connecting pipe 433 is installed in the pipe through the spray connecting pipe input port 45, the demisting spray nozzle 434 is installed at the bottom of the demisting connecting pipe 433, after the demisting assembly 43 is opened, water gas on the wire mesh demister can be eliminated, gas rising is smoother, and gas collection efficiency is improved. The side walls of the connecting pipe 431 and the three-way pipe 432 are of a double-layer structure provided with an internal cavity 10, the internal cavity 10 is provided with a steam inlet 101 for gas drying and a steam outlet 102 for gas drying, and ammonia gas, carbon dioxide and water vapor generated by hydrolysis reaction are indirectly heated after the internal cavity 10 is filled with steam, so that gas drying is realized.
As shown in FIG. 1, a plurality of observation windows 9 are arranged on the side wall of the main reaction vessel 1, so that the reaction condition in the vessel is conveniently observed, a maintenance opening 8 is further arranged at the top of the main reaction vessel 1, and after the main reaction vessel does not work and the solution in the vessel is emptied, maintenance personnel can enter the main reaction vessel from the maintenance opening for maintenance.
The invention is not limited to the specific embodiments described above. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed.
Claims (4)
1. A urea hydrolysis reactor, characterized by: the device comprises a main reaction container (1), a main heater (2), an auxiliary heater (3) and a gas collector (4), wherein the main reaction container (1) is provided with an internal partition plate (5) for separating the main reaction container (1) into a main heating chamber (11) and an auxiliary heating chamber (12), the main heating chamber (11) and the auxiliary heating chamber (12) are respectively provided with a urea liquid inlet (6) and a liquid outlet (7), and the bottoms of the main heating chamber (11) and the auxiliary heating chamber (12) are not communicated with each other and the tops of the main heating chamber (11) and the auxiliary heating chamber (12) are communicated with each other; the main heater (2) and the auxiliary heater (3) are respectively used for heating the main heating chamber (11) and the auxiliary heating chamber (12); the gas collector (4) is communicated with the interiors of the main heating chamber (11) and the auxiliary heating chamber (12) and is used for collecting gas generated in the heating process of urea solution;
The main heater (2) and the auxiliary heater (3) are respectively provided with a heating pipe (21; 31), a steam inlet (22; 32), a steam outlet (23; 33) and an auxiliary agent input elbow pipe (24; 34), and the auxiliary agent input elbow pipe (24; 34) is used for adding a reaction auxiliary agent into the main heating chamber (11) or the auxiliary heating chamber (12); the outside of the auxiliary agent input elbow pipe (24; 34) is coaxially provided with a steam pipeline (25; 35), the steam pipeline (25; 35) is used for heating the auxiliary agent in the auxiliary agent input elbow pipe (24; 34), and the steam pipeline (25; 35) is provided with an auxiliary agent preheating steam inlet (251; 351) and an auxiliary agent preheating steam outlet (252; 352);
the utility model provides a gas collector (4) is including gas take over (41), silk screen demister (42) and spray subassembly (43), the bottom intercommunication main reaction vessel (1) of gas take over (41), silk screen demister (42) are installed inside gas take over (41), spray subassembly (43) are including connecting pipe (431), three-way pipe (432), defogging take over (433) and defogging shower nozzle (434), the top of gas take over (41) and the opening one of three-way pipe (432) are connected at the both ends of connecting pipe (431), opening two and opening three of three-way pipe (432) are respectively as gas delivery outlet (44) and spray take over input port (45), defogging shower nozzle (434) are installed in the bottom of defogging take over (433).
2. The urea hydrolysis reactor according to claim 1, characterized in that: the heating pipes (21; 31) are U-shaped heating pipes.
3. The urea hydrolysis reactor according to claim 1, characterized in that: the side walls of the connecting pipe (431) and the three-way pipe (432) are of double-layer structures provided with an inner cavity (10), and the inner cavity (10) is provided with a steam inlet (101) for gas drying and a steam outlet (102) for gas drying.
4. The urea hydrolysis reactor according to claim 1, characterized in that: the side wall of the main reaction container (1) is provided with a plurality of observation windows (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711363139.2A CN107840353B (en) | 2017-12-18 | 2017-12-18 | Urea hydrolysis reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711363139.2A CN107840353B (en) | 2017-12-18 | 2017-12-18 | Urea hydrolysis reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107840353A CN107840353A (en) | 2018-03-27 |
| CN107840353B true CN107840353B (en) | 2024-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711363139.2A Active CN107840353B (en) | 2017-12-18 | 2017-12-18 | Urea hydrolysis reactor |
Country Status (1)
| Country | Link |
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| CN (1) | CN107840353B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111153415B (en) * | 2020-03-06 | 2024-04-02 | 济南山源环保科技有限公司 | Capturing CO in urea catalytic hydrolysis generated gas 2 Is a device of (2) |
| CN115463636A (en) * | 2022-09-27 | 2022-12-13 | 西安热工研究院有限公司 | Hydrolysis reactor suitable for wide load regulation and operation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102151470A (en) * | 2011-01-28 | 2011-08-17 | 山东华鲁恒升集团德化设计研究有限公司 | Flue gas desulfurization method and device |
| CN205187889U (en) * | 2015-10-20 | 2016-04-27 | 洛阳中广石油化工机械设备有限公司 | Urea hydrolysis reactor |
| CN207774818U (en) * | 2017-12-18 | 2018-08-28 | 江苏中立环保科技有限公司 | Hydrolysis of urea reactor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767978A (en) * | 2012-07-19 | 2012-11-07 | 扬州电力设备修造厂 | Air-cooled heat exchange device |
| CN206318713U (en) * | 2016-07-25 | 2017-07-11 | 上海纽帕化工有限公司 | A kind of hydrolysis of urea reactor |
| CN107159081B (en) * | 2017-04-17 | 2019-10-18 | 赵寰宇 | Urea hydrolysis ammonia production process adopting urea rising film type self-circulation hydrolysis reactor |
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2017
- 2017-12-18 CN CN201711363139.2A patent/CN107840353B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102151470A (en) * | 2011-01-28 | 2011-08-17 | 山东华鲁恒升集团德化设计研究有限公司 | Flue gas desulfurization method and device |
| CN205187889U (en) * | 2015-10-20 | 2016-04-27 | 洛阳中广石油化工机械设备有限公司 | Urea hydrolysis reactor |
| CN207774818U (en) * | 2017-12-18 | 2018-08-28 | 江苏中立环保科技有限公司 | Hydrolysis of urea reactor |
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| Publication number | Publication date |
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| CN107840353A (en) | 2018-03-27 |
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