CN112978760A - Urea hydrolysis device - Google Patents
Urea hydrolysis device Download PDFInfo
- Publication number
- CN112978760A CN112978760A CN201911281769.4A CN201911281769A CN112978760A CN 112978760 A CN112978760 A CN 112978760A CN 201911281769 A CN201911281769 A CN 201911281769A CN 112978760 A CN112978760 A CN 112978760A
- Authority
- CN
- China
- Prior art keywords
- urea
- urea tank
- tank body
- interface
- heater
- 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.)
- Pending
Links
Images
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)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention provides a urea hydrolysis device, comprising: the first interface of the urea tank body is connected with the first end of the first pipeline, the second interface of the urea tank body is connected with the second end of the second pipeline, the first interface is arranged at the bottom of the urea tank body, the second interface is arranged on the side wall of the urea tank body, and the height of the second interface is higher than the liquid level of the urea solution in the urea tank body; the heater is arranged outside the urea tank body, the first end of the heater is connected with the second end of the first pipeline, and the second end of the heater is connected with the first end of the second pipeline; the primary steam-water separator is arranged in the urea tank body and close to the heater side; and the second-stage steam-water separator is arranged in the urea tank body and is close to the air outlet of the urea tank body. The invention improves the ammonia production efficiency of the urea hydrolysis device in the preheating stage and the ammonia production quality under low load.
Description
Technical Field
The embodiment of the invention relates to the field of environmental protection, in particular to a urea hydrolysis device.
Background
The ammonia gas needs to be used for industrial denitration, at present, the existing urea hydrolysis device is a horizontal reaction kettle with a built-in heater, the ammonia gas generated by the horizontal reaction kettle with the built-in heater needs to pass through a urea solution layer and then is discharged from the reaction kettle, and the reaction kettle needs to heat the urea solution to a certain temperature to generate the ammonia gas, so that the ammonia gas cannot be rapidly produced. In addition, during low load, the consumption of ammonia is reduced, the working temperature and pressure of the reaction kettle need to be reduced, the generated ammonia does not reach the standard, and the ammonia is easily recrystallized into urea in a conveying pipeline, so that a pipeline system is blocked and corroded. It can be seen that the existing urea hydrolysis device has low ammonia production efficiency in the preheating stage and poor ammonia production quality under low load.
Disclosure of Invention
The embodiment of the invention aims to provide a urea hydrolysis device, which solves the problems that the prior urea hydrolysis device has low ammonia production efficiency in the preheating stage and has poor ammonia production quality under low load.
In order to achieve the above object, an embodiment of the present invention provides a urea hydrolysis apparatus including:
the urea tank comprises a urea tank body, wherein a first interface of the urea tank body is connected with a first end of a first pipeline, a second interface of the urea tank body is connected with a second end of a second pipeline, the first interface is arranged at the bottom of the urea tank body, the second interface is arranged on the side wall of the urea tank body, and the height of the second interface is higher than the liquid level of urea solution in the urea tank body;
the heater is arranged outside the urea tank, the first end of the heater is connected with the second end of the first pipeline, and the second end of the heater is connected with the first end of the second pipeline;
the primary steam-water separator is arranged in the urea tank body and close to the heater side;
and the second-stage steam-water separator is arranged in the urea tank body and is close to the air outlet of the urea tank body.
Optionally, a first isolation shutoff valve is arranged at a position between two ends of the first pipeline, and a second isolation shutoff valve is arranged at a position between two ends of the second pipeline.
Optionally, the first end of the first-stage steam-water separator is immersed in the urea solution, the second end of the first-stage steam-water separator is fixed on the inner wall of the urea tank, a gap is formed in a position between two ends of the first-stage steam-water separator, and the height of the gap is higher than the liquid level of the urea solution.
Optionally, the lateral wall of the urea tank body is provided with a feed inlet, and the height of the feed inlet is higher than the liquid level of the urea solution.
Optionally, a third interface and a fourth interface are respectively arranged at the shoulder position of the urea tank body, the third interface is used for testing the temperature and the pressure of ammonia gas in the urea tank body, and the fourth interface is a safety valve interface.
Optionally, the top of the urea tank body is provided with the gas outlet, and the bottom of the urea tank body is provided with a discharge outlet.
One of the above technical solutions has the following advantages or beneficial effects:
the embodiment of the invention provides a urea hydrolysis device, which comprises: the urea tank comprises a urea tank body, wherein a first interface of the urea tank body is connected with a first end of a first pipeline, a second interface of the urea tank body is connected with a second end of a second pipeline, the first interface is arranged at the bottom of the urea tank body, the second interface is arranged on the side wall of the urea tank body, and the height of the second interface is higher than the liquid level of urea solution in the urea tank body; the heater is arranged outside the urea tank, the first end of the heater is connected with the second end of the first pipeline, and the second end of the heater is connected with the first end of the second pipeline; the primary steam-water separator is arranged in the urea tank body and close to the heater side; and the second-stage steam-water separator is arranged in the urea tank body and is close to the air outlet of the urea tank body. Like this, because the heater setting is in urea jar external portion and be provided with one-level catch water, the urea hydrolysis device receives operating temperature and pressure restriction little and the ammonia of production and urea solution area of contact little, ammonia production quality when having improved urea hydrolysis device preheating stage ammonia production efficiency and low-load.
Drawings
FIG. 1 is a schematic structural diagram of a urea hydrolysis apparatus according to an embodiment of the present invention;
FIG. 2 is a top view of another urea hydrolysis apparatus provided in accordance with an embodiment of the present invention;
FIG. 3 is a top view of another urea hydrolysis apparatus provided in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a urea hydrolysis apparatus including:
the device comprises a urea tank body 1, wherein a first connector 10 of the urea tank body 1 is connected with a first end of a first pipeline 5, a second connector 11 of the urea tank body is connected with a second end of a second pipeline 6, the first connector 10 is arranged at the bottom of the urea tank body 1, the second connector 11 is arranged on the side wall of the urea tank body 1, and the height of the second connector 11 is higher than the liquid level 7 of urea solution in the urea tank body 1;
the heater 2 is arranged outside the urea tank body 1, a first end of the heater 2 is connected with a second end of the first pipeline 5, and a second end of the heater 2 is connected with a first end of the second pipeline 6;
the primary steam-water separator 3 is arranged in the urea tank body 1 and close to the heater 2 side;
and the secondary steam-water separator 4 is arranged in the urea tank body 1 and is close to the air outlet 12 of the urea tank body 1.
Wherein, the urea tank body 1 and the heater 2 can be connected through a pipeline or can be integrally formed.
The urea tank 1 may be one and connected to the heaters 2 through pipes to form a set of equipment system, as shown in fig. 2, the urea tank 1 may be two and connected to the heaters 2 through pipes to form a set of equipment system, as shown in fig. 3, so the number of the urea tank 1 and the number of the heaters 2 are not limited.
The heater 2 may be a shell-and-tube heat exchanger or a plate heat exchanger.
Wherein the heater 2 is arranged outside the urea tank 1, so that the steam saturation temperature and pressure limit of the heater 2 can be reduced.
Wherein, the mixed gas of ammonia gas, carbon dioxide and water vapor comes out of the second end of the heater 2.
The first-stage steam-water separator 3 is close to the second connector 11, and the first-stage steam-water separator 3 can be a baffle gap separator or a cyclone separator.
Wherein, second grade catch water 4 can be wave form plate separator or wire net separator, and second grade catch water 4 inside can set up the heater.
It should be noted that, when the heater 2 adopts a shell-and-tube heat exchanger or a plate heat exchanger, the interface on the heater 2 further includes a heating medium inlet/outlet interface and a heater emptying interface, and the heater 2 may adopt high-temperature medium steam and oil as a heat source, of course, electricity as a heat source, and when electricity is adopted as a heat source, the heater 2 may be an electric heater type pressure vessel.
In this embodiment, the urea solution in the urea tank 1 enters the heater 2 through the first interface 10, and is decomposed into a mixed gas of ammonia, carbon dioxide and water vapor in the heater 2, the mixed gas returns to the urea tank 1 through the second interface 11 from the second end of the heater 2, and a certain amount of urea solution is contained in the returned mixed gas, because ammonia and carbon dioxide are partially dissolved in water drops condensed by water vapor, most of gas-liquid separation can be realized at the primary steam-water separator, the liquid falls into the urea solution in the urea tank 1, the mixed gas passing through the primary steam-water separator 3 further performs gas-liquid separation at the secondary steam-water separator 4, and then is discharged out of the urea tank 1 through the gas outlet 12. Like this, reduced the contact of ammonia with the urea solution in the urea jar body 1, simultaneously, heater 2 sets up the restriction that can reduce operating temperature and pressure in the urea jar body 1 outside, and ammonia production quality when having improved urea hydrolysis unit preheating stage ammonia production efficiency and low-load.
Optionally, as shown in fig. 1, a first isolation shutoff valve 50 is disposed at a position between two ends of the first pipeline 5, and a second isolation shutoff valve 60 is disposed at a position between two ends of the second pipeline 6.
Wherein the first isolation shut-off valve 50 and the second isolation shut-off valve 60 can be opened and closed by terminal control.
In the embodiment, when the heater 2 has a fault, the on-line maintenance can be realized by arranging the isolation shut-off valve 50 and the isolation shut-off valve 60, so that the convenience of maintenance of the urea hydrolysis device is improved.
Optionally, as shown in fig. 1, a first end of the primary steam-water separator 3 is immersed in the urea solution, a second end of the primary steam-water separator 3 is fixed to an inner wall of the urea tank, a gap is formed between two ends of the primary steam-water separator, and the height of the gap is higher than a liquid level 7 of the urea solution.
Wherein, the first-stage steam-water separator 3 is a baffle gap separator.
In this embodiment, the first end of the primary steam-water separator 3 is immersed in the urea solution to reduce a contact area between the mixed gas discharged from the second connector 11 and the urea solution, and to separate gas from liquid in the mixed gas, and a gap is provided between the two ends of the primary steam-water separator to discharge the separated gas, so as to further improve the quality of ammonia production.
Optionally, as shown in fig. 1, a feed port 13 is disposed on a side wall of the urea tank 1, and a height of the feed port 13 is higher than the liquid level 7 of the urea solution.
Wherein, a plurality of (for example: 2) feed ports 13 can be provided, as shown in fig. 2.
It should be noted that, a liquid level measuring interface may also be arranged on the side wall of the urea tank 1.
In this embodiment, feed inlet 13 can supply urea solution after urea solution reduces in the urea jar body 1, and feed inlet 13 highly be higher than urea solution's liquid level 7 can avoid urea solution refluence in the urea jar body 1, has made things convenient for the injection of urea solution.
Optionally, as shown in fig. 1, a third interface 14 and a fourth interface 15 are respectively disposed at a shoulder position of the urea tank 1, where the third interface 14 is used for testing the temperature and the pressure of ammonia gas in the urea tank, and the fourth interface 15 is a safety valve interface.
The number of the third interfaces 14 may be plural, and the number is not limited.
The fourth port 15 may be a safety valve port, and the number of the fourth ports is not limited.
In this embodiment, the third interface 14 is used for testing the temperature and the pressure of the ammonia gas in the urea tank body, and when the pressure in the urea tank body 1 exceeds a threshold value, the fourth interface 15 is opened to discharge a part of gas or fluid, so as to protect the urea hydrolysis device and improve the safety of the urea hydrolysis device.
Optionally, as shown in fig. 1, the gas outlet 12 is disposed at the top of the urea tank 1, and the discharge port 16 is disposed at the bottom of the urea tank.
The drain port 16 may be provided at the lowest position of the bottom of the urea tank 1.
In this embodiment, the gas outlet 12 is used for discharging ammonia, and the discharge port 16 is used for discharging waste liquid of decomposed urea solution, so as to facilitate injecting new urea solution for decomposition again, thereby improving the quality of ammonia.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. A urea hydrolysis apparatus, comprising:
the urea tank comprises a urea tank body, wherein a first interface of the urea tank body is connected with a first end of a first pipeline, a second interface of the urea tank body is connected with a second end of a second pipeline, the first interface is arranged at the bottom of the urea tank body, the second interface is arranged on the side wall of the urea tank body, and the height of the second interface is higher than the liquid level of urea solution in the urea tank body;
the heater is arranged outside the urea tank, the first end of the heater is connected with the second end of the first pipeline, and the second end of the heater is connected with the first end of the second pipeline;
the primary steam-water separator is arranged in the urea tank body and close to the heater side;
and the second-stage steam-water separator is arranged in the urea tank body and is close to the air outlet of the urea tank body.
2. The urea hydrolysis apparatus according to claim 1, wherein a first isolation shut-off valve is provided at a position between both ends of said first conduit, and a second isolation shut-off valve is provided at a position between both ends of said second conduit.
3. The urea hydrolysis apparatus according to claim 1, wherein a first end of the primary steam-water separator is immersed in the urea solution, a second end of the primary steam-water separator is fixed to an inner wall of the urea tank, a gap is provided between two ends of the primary steam-water separator, and the height of the gap is higher than the liquid level of the urea solution.
4. The urea hydrolysis apparatus according to claim 1, wherein a side wall of the urea tank is provided with a feed port, and a height of the feed port is higher than a liquid level of the urea solution.
5. The urea hydrolysis apparatus according to claim 1, wherein a third port and a fourth port are respectively disposed at a shoulder position of the urea tank, the third port is used for testing the temperature and the pressure of ammonia gas in the urea tank, and the fourth port is a safety valve port.
6. The urea hydrolysis apparatus according to claim 1, wherein said outlet port is provided at a top portion of said urea tank, and a drain port is provided at a bottom portion of said urea tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911281769.4A CN112978760A (en) | 2019-12-13 | 2019-12-13 | Urea hydrolysis device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911281769.4A CN112978760A (en) | 2019-12-13 | 2019-12-13 | Urea hydrolysis device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112978760A true CN112978760A (en) | 2021-06-18 |
Family
ID=76332523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911281769.4A Pending CN112978760A (en) | 2019-12-13 | 2019-12-13 | Urea hydrolysis device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112978760A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113697827A (en) * | 2021-08-20 | 2021-11-26 | 江西赣能股份有限公司 | SCR denitration urea hydrolysis ammonia production device |
-
2019
- 2019-12-13 CN CN201911281769.4A patent/CN112978760A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113697827A (en) * | 2021-08-20 | 2021-11-26 | 江西赣能股份有限公司 | SCR denitration urea hydrolysis ammonia production device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112978760A (en) | Urea hydrolysis device | |
| CN211169873U (en) | Urea hydrolysis device | |
| CN207006117U (en) | A kind of boiler condensed water recovering device | |
| CN212870804U (en) | Oil gas sprays condensing tank | |
| CN205145620U (en) | Multi -use liquid ammonia evaporator | |
| CN201473332U (en) | Ammonium sulfate concentration device | |
| CN201545896U (en) | Device for reclaiming circuit board etching waste liquid and producing basic copper chloride | |
| CN204227406U (en) | A kind of coke dry quenching boiler feedwater deaerating system | |
| CN208071333U (en) | A kind of low-energy consumption urea hydrolysis reactor | |
| CN206566763U (en) | A kind of gas treatment equipment | |
| CN205245140U (en) | Weary gas recovery unit and recovery system | |
| CN209445344U (en) | A kind of novel deaerator emptying vapour-recovery unit | |
| CN101226032A (en) | Waste steam utilization equipment | |
| CN112156745A (en) | Vertical non-catalytic urea hydrolysis reactor for denitration | |
| CN202950993U (en) | Rapid temperature and pressure reducing system in sterilizing and feeding tank and sterilizing and stirring tank | |
| CN219530817U (en) | Fixed exhaust steam recovery processing environmental protection system of coal chemical industry boiler | |
| CN207254050U (en) | A kind of exhaust treatment system of polyethers device | |
| CN207986778U (en) | A kind of chlorine dioxide generator extraction raffinate absorption neutralizing tower | |
| CN206113688U (en) | Dead steam recycling device | |
| CN210829417U (en) | Steam turbine exhaust steam sludge drying system | |
| CN209828292U (en) | Steam type ammonia water evaporator and system | |
| CN205014338U (en) | Prevent exhaust -heat boiler integration deoxidization water supply system of coke oven flue gas corruption | |
| CN214501188U (en) | Boiler blow-off cooling recovery device | |
| CN204063605U (en) | One self-priming anti-water collecting device on oil field heating furnace | |
| CN202415690U (en) | Circuit board waste etching solution recovering device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |