CN220891848U - Special device for gasifying liquid ammonia - Google Patents
Special device for gasifying liquid ammonia Download PDFInfo
- Publication number
- CN220891848U CN220891848U CN202322514115.XU CN202322514115U CN220891848U CN 220891848 U CN220891848 U CN 220891848U CN 202322514115 U CN202322514115 U CN 202322514115U CN 220891848 U CN220891848 U CN 220891848U
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- China
- Prior art keywords
- pipeline
- liquid ammonia
- preheater
- heating mechanism
- inner cavity
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 115
- 238000010438 heat treatment Methods 0.000 claims abstract description 52
- 230000007246 mechanism Effects 0.000 claims abstract description 45
- 238000006243 chemical reaction Methods 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims description 5
- 238000002309 gasification Methods 0.000 claims description 2
- 229910021529 ammonia Inorganic materials 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- ZZTCCAPMZLDHFM-UHFFFAOYSA-N ammonium thioglycolate Chemical class [NH4+].[O-]C(=O)CS ZZTCCAPMZLDHFM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
Landscapes
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
The utility model discloses a special device for gasifying liquid ammonia, which relates to the technical field of liquid ammonia feeding and comprises a heating mechanism and a preheater, wherein the heating mechanism comprises an outer cavity and an inner cavity, the inner cavity is arranged in the outer cavity, a first pipeline and a second pipeline are respectively arranged at two ends of the inner cavity, one end of the first pipeline, which is far away from the heating mechanism, is connected with a storage tank, and one end of the second pipeline, which is far away from the heating mechanism, is positioned in a reaction kettle; the preheater is positioned between the heating mechanism and the storage tank, and the first pipeline penetrates through the preheater; the two ends of the preheater are respectively connected with a first liquid guide pipe and a second liquid guide pipe, the outer cavity is provided with a third pipeline, the second liquid guide pipe is connected with the outer cavity, and the first liquid guide pipe and the third pipeline are both connected with the heat medium mechanism. Therefore, the liquid ammonia is initially heated by the preheater, so that the liquid ammonia reaches the critical point of conversion before entering the heating mechanism, and the speed of converting the liquid ammonia into ammonia is increased.
Description
Technical Field
The utility model relates to the technical field of liquid ammonia feeding, in particular to a special device for liquid ammonia gasification.
Background
In the production process of the ammonium thioglycolate series products, liquid ammonia needs to be added, wherein in order to ensure the reaction is sufficient, the liquid ammonia needs to be gasified. In the conventional technology, liquid ammonia is gasified by pouring hot water on a liquid ammonia tank or heating a tank body by using water vapor.
However, the pressure and flow of the ammonia gas are unstable, and sometimes the ammonia gas can flow out together with part of liquid ammonia, so that the subsequent reaction is unstable, and the production difficulty is increased.
Disclosure of utility model
Aiming at the defects, the utility model aims to provide a special device for gasifying liquid ammonia, and aims to solve the problem that in the prior art, ammonia can flow out with part of liquid ammonia, so that the follow-up reaction is unstable.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
The special device for gasifying the liquid ammonia comprises a heating mechanism and a preheater, wherein the heating mechanism comprises an outer cavity and an inner cavity, the inner cavity is arranged in the outer cavity, a first pipeline and a second pipeline are respectively arranged at two ends of the inner cavity, one end of the first pipeline, which is far away from the heating mechanism, is connected with a storage tank, and one end of the second pipeline, which is far away from the heating mechanism, is positioned in a reaction kettle; the preheater is positioned between the heating mechanism and the storage tank, and the first pipeline penetrates through the preheater; the two ends of the preheater are respectively connected with a first liquid guide pipe and a second liquid guide pipe, the outer cavity is provided with a third pipeline, the second liquid guide pipe is connected with the outer cavity, and the first liquid guide pipe and the third pipeline are both connected with a heat medium mechanism.
The first pipeline comprises a preheating pipeline, the preheating pipeline is positioned in the preheater, and the other end of the preheating pipeline is connected with the inner cavity.
Wherein the preheating pipeline is a coil pipe or a coiled pipe.
And a heating pipeline is arranged between the inner cavity and the outer cavity, the heating pipeline is arranged around the inner cavity, and two ends of the heating pipeline are respectively connected with the second liquid guide pipe and the third pipeline.
Wherein, the heat preservation is filled to between inner chamber and the outer cavity.
The first pipeline is connected with a detection part for detecting liquid ammonia flow and an electromagnetic valve for controlling liquid ammonia flow, and the detection part and the electromagnetic valve are both positioned between the storage tank and the preheater.
And the second pipeline is provided with an electric control valve and a pressure reducing valve, and the electric control valve and the pressure reducing valve are both positioned between the heating mechanism and the reaction kettle.
Wherein, the gas-inducing pipe is installed at the top of reation kettle, the one end and the second pipeline of gas-inducing pipe are connected.
Wherein, the air guide pipe is provided with a check valve.
After the technical scheme is adopted, the utility model has the beneficial effects that:
Firstly, carry out preliminary heating to liquid ammonia through the pre-heater for liquid ammonia just reaches the critical point of conversion before entering into heating mechanism, thereby has quickened the speed that liquid ammonia changed into ammonia, has guaranteed that the pressure, the flow of ammonia are stable, has avoided the ammonia to take a part of liquid ammonia to flow out. And secondly, the preheater also reduces the waste of energy. Thirdly, the preheater and the heating mechanism are heated up in double, so that the conversion efficiency of liquid ammonia is further improved.
Drawings
FIG. 1 is a block diagram of a device dedicated to liquid ammonia vaporization;
FIG. 2 is a block diagram of a preheater;
Fig. 3 is a structural view of the heating mechanism.
In the figure: the device comprises a heating mechanism, an outer cavity, an inner cavity, a first pipeline, a second pipeline, an electric control valve, a pressure reducing valve, a third pipeline, a heating pipeline, a heat insulating layer, a 2-preheater, a first liquid guide pipe, a second liquid guide pipe, a preheating pipeline, a 3-reaction kettle, a 31-gas guide pipe, a check valve, a 4-storage tank, a 41-detection part, a 42-electromagnetic valve and a 5-heat medium mechanism.
Detailed Description
The utility model is further elucidated below in conjunction with the accompanying drawings.
The orientations referred to in the present specification are all based on the orientations of the device for vaporizing liquid ammonia in the normal operation of the device, and are not limited to the orientations during storage and transportation, but only represent relative positional relationships, and not absolute positional relationships.
Examples:
As shown in fig. 1-3, a special device for gasifying liquid ammonia comprises a heating mechanism 1 and a preheater 2, wherein the heating mechanism 1 comprises an outer cavity 11 and an inner cavity 12, the inner cavity 12 is arranged in the outer cavity 11, a first pipeline 13 and a second pipeline 14 are respectively arranged at two ends of the inner cavity 12, one end, far away from the heating mechanism 1, of the first pipeline 13 is connected with a storage tank 4, and one end, far away from the heating mechanism 1, of the second pipeline 14 is positioned in a reaction kettle 3; the preheater 2 is positioned between the heating mechanism 1 and the storage tank 4, and the first pipeline 13 penetrates through the preheater 2; the two ends of the preheater 2 are respectively connected with a first liquid guide pipe 21 and a second liquid guide pipe 22, the outer cavity 11 is provided with a third pipeline 15, the second liquid guide pipe 22 is connected with the outer cavity 11, and the first liquid guide pipe 21 and the third pipeline 15 are both connected with the heat medium mechanism 5. In this solution, the storage tank 4 is used for containing liquid ammonia, wherein the liquid ammonia sequentially enters the first pipeline 13, the preheater 2 and the inner cavity 12, and the liquid ammonia is preheated when passing through the preheater 2 and then enters the inner cavity 12, and is fully heated in the inner cavity 12. The liquid ammonia is converted into ammonia gas after being heated, and the ammonia gas enters the reaction kettle 3 through the second pipeline 14. In order to facilitate the preheating of the liquid ammonia by the preheater 2, the present solution incorporates a heat medium mechanism 5. The heat medium mechanism 5 functions to supply high-temperature flowing medium to the whole apparatus, the high-temperature medium flows between the preheater 2 and the heating mechanism 1 through the first liquid guide tube 21, the third pipe 15 and the second liquid guide tube 22, and the high-temperature medium is heat-exchanged with the liquid ammonia. After the high-temperature medium exchanges heat with the liquid ammonia, the medium temperature becomes low, and then the low-temperature medium returns to the heat medium mechanism 5 to be heated again for recycling.
In this scheme, there are two choices for the flow direction of the high temperature medium: firstly, the high-temperature medium enters the preheater 2 along the first liquid guide tube 21, and no heat exchange occurs between the high-temperature medium and the liquid ammonia in the preheater 2, so that the temperature of the liquid ammonia rises before entering the heating mechanism 1. The high temperature medium then reaches the outer cavity 11 again through the second liquid guide tube 22, the high temperature medium exchanges heat with the inner cavity 12 in the outer cavity 11, then the inner cavity 12 exchanges heat with the liquid ammonia therein, so that the liquid ammonia is warmed up to become ammonia gas, and then the ammonia gas is discharged through the second pipeline 14. While the high temperature medium becomes a low temperature medium in the outer chamber 11, and the low temperature medium returns to the heat medium mechanism 5 along the third pipe 15.
In the above manner, the liquid ammonia is preliminarily heated in the preheater 2, at which time the temperature of the liquid ammonia has been raised, and then the liquid ammonia is sufficiently heated after entering the heating mechanism 1. The speed of converting liquid ammonia into ammonia gas is increased due to the increase of the temperature of the liquid ammonia, so that the production speed of the ammonia gas is increased in the mode. Since the temperature of the high-temperature medium just flowing out of the heat medium mechanism 5 is too high, this results in that part of the liquid ammonia is converted into ammonia gas when the liquid ammonia flows through the preheater 2, and this part of the ammonia gas causes the liquid ammonia to tumble in the heating mechanism 1, so that the liquid ammonia in the central region of the inner chamber 12 and the liquid ammonia near the inner wall of the inner chamber 12 are mixed with each other and heated uniformly.
The second way is that the high temperature medium flows through the third pipe 15, the heating means 1, the second catheter 22, the first catheter 21 in this order, and then returns to the heating means 1. In this embodiment, the flow direction of the high-temperature medium is the same as that of the first embodiment, although the principle is the same. The difference is that the temperature of the high-temperature medium is reduced after heat exchange with the liquid ammonia in the heating mechanism 1, and the medium becomes a low-temperature medium, but the temperature of the medium can still reach about 80 ℃ at this time, so that the liquid ammonia can still be initially heated.
The two modes not only play a role in accelerating the conversion speed of liquid ammonia into ammonia, but also fully ensure the utilization rate of energy and reduce the waste of energy.
In this scheme, the first pipeline includes preheating pipeline, preheating pipeline is located the pre-heater, preheating pipeline's the other end and inner chamber connection. The design ensures that the preheating pipeline 23 is fully surrounded after the high-temperature medium enters the preheating period device, thereby enlarging the heat exchange area and accelerating the heating speed of liquid ammonia. Wherein the outer wall of the preheater 2 is made of a heat-insulating material. Among them, there are various choices of heat insulating materials, such as heat insulating cotton, heat insulating foam, etc.
Preferably, the preheating pipe 23 is a coil pipe or a serpentine pipe. This design lengthens the residence time of the liquid ammonia in the preheater 2, thus allowing the liquid ammonia temperature to be further raised.
Since the heat exchanger is large in volume, if the high temperature medium is uniformly filled in the outer chamber, this increases the heat exchange area with the inner chamber 12, but this also results in an increase in the heat exchange area of the high temperature medium with the outside, and thus increases the consumption of energy. For this purpose, a heating pipe 16 is installed between the inner cavity 12 and the outer cavity 11, the heating pipe 16 is disposed around the inner cavity 12, and two ends of the heating pipe 16 are respectively connected with the second catheter 22 and the third pipe 15. Preferably, a heat insulation layer 17 is filled between the inner cavity 12 and the outer cavity 11.
For conveniently controlling the flow rate of the liquid ammonia, the first pipeline 13 is connected with a detecting member 41 for detecting the flow rate of the liquid ammonia and an electromagnetic valve 42 for controlling the flow rate of the liquid ammonia, and the detecting member 41 and the electromagnetic valve 42 are both positioned between the storage tank 4 and the preheater 2. The detecting piece 41 is in communication connection with the PC end, detected flow data are transmitted to the background, and a background worker can control the opening of the electromagnetic valve 42 according to the flow data, so that the effect of controlling the flow of liquid ammonia is achieved.
Similarly, in order to control the flow of ammonia conveniently, the second pipeline 14 is provided with an electric control valve 141 and a pressure reducing valve 142, and the electric control valve 141 and the pressure reducing valve 142 are both positioned between the heating mechanism 1 and the reaction kettle 3. Since the volume of the liquid ammonia increases rapidly after the conversion into ammonia gas, the second pipe 14 needs to be provided with a pressure reducing valve 142 in order to avoid the inner chamber 12 and the second pipe 14 from being damaged due to high pressure.
After the ammonia enters the reaction kettle 3, along with the reaction of the ammonia and materials in the kettle, part of the ammonia overflows because of untimely reaction, and in order to reuse the part of the ammonia, a gas-guiding pipe 31 is arranged at the top of the reaction kettle 3, and one end of the gas-guiding pipe 31 is connected with a second pipeline 14. The gas introduction pipe 31 reintroduces the ammonia gas into the second pipe 14 so that this part of the ammonia gas is returned to the reaction tank 3 again. To prevent that the pressure in the bleed air pipe 31 is too high to allow ammonia gas to enter the second conduit 14, a non-return valve 32 is mounted on said bleed air pipe 31.
In this scheme, the high-temperature medium has various choices, such as heat conducting oil, water vapor, etc.
In summary, the scheme has the following advantages: firstly, carry out preliminary heating to liquid ammonia through pre-heater 2 for liquid ammonia just reaches the critical point of conversion before entering heating mechanism 1, thereby has quickened the speed that liquid ammonia changed into ammonia, has guaranteed that the pressure, the flow of ammonia are stable, has avoided the ammonia to take a part of liquid ammonia to flow out. Secondly, the preheater 2 also reduces the waste of energy. Thirdly, the preheater 2 and the heating mechanism 1 are heated up doubly, so that the conversion efficiency of liquid ammonia is further improved.
The present utility model is not limited to the above-described specific embodiments, and various modifications may be made by those skilled in the art without inventive effort from the above-described concepts, and are within the scope of the present utility model.
Claims (9)
1. The utility model provides a special device of liquid ammonia gasification which characterized in that: the heating device comprises a heating mechanism (1) and a preheater (2), wherein the heating mechanism (1) comprises an outer cavity (11) and an inner cavity (12), the inner cavity (12) is arranged in the outer cavity (11), a first pipeline (13) and a second pipeline (14) are respectively arranged at two ends of the inner cavity (12), one end, far away from the heating mechanism (1), of the first pipeline (13) is connected with a storage tank (4), and one end, far away from the heating mechanism (1), of the second pipeline (14) is positioned in a reaction kettle (3); the preheater (2) is positioned between the heating mechanism (1) and the storage tank (4), and the first pipeline (13) penetrates through the preheater (2); the two ends of the preheater (2) are respectively connected with a first liquid guide pipe (21) and a second liquid guide pipe (22), the outer cavity (11) is provided with a third pipeline (15), the second liquid guide pipe (22) is connected with the outer cavity (11), and the first liquid guide pipe (21) and the third pipeline (15) are both connected with the heat medium mechanism (5).
2. The apparatus for gasifying liquid ammonia according to claim 1, wherein: the first pipeline (13) comprises a preheating pipeline (23), the preheating pipeline (23) is positioned in the preheater (2), and the other end of the preheating pipeline (23) is connected with the inner cavity (12).
3. The apparatus for gasifying liquid ammonia according to claim 2, wherein: the preheating pipeline (23) is a coil pipe or a coiled pipe.
4. The apparatus for gasifying liquid ammonia according to claim 1, wherein: a heating pipeline (16) is arranged between the inner cavity (12) and the outer cavity (11), the heating pipeline (16) is arranged around the inner cavity (12), and two ends of the heating pipeline (16) are respectively connected with a second liquid guide pipe (22) and a third pipeline (15).
5. The apparatus for gasifying liquid ammonia according to claim 4, wherein: an insulating layer (17) is filled between the inner cavity (12) and the outer cavity (11).
6. The apparatus for gasifying liquid ammonia according to claim 1, wherein: the first pipeline (13) is provided with a detection piece (41) and an electromagnetic valve (42), and the detection piece (41) and the electromagnetic valve (42) are both positioned between the storage tank (4) and the preheater (2).
7. The apparatus for gasifying liquid ammonia according to claim 1, wherein: an electric control valve (141) and a pressure reducing valve (142) are arranged on the second pipeline (14), and the electric control valve (141) and the pressure reducing valve (142) are both positioned between the heating mechanism (1) and the reaction kettle (3).
8. The apparatus for gasifying liquid ammonia according to claim 1, wherein: and a gas-guiding pipe (31) is arranged at the top of the reaction kettle (3), and one end of the gas-guiding pipe (31) is connected with the second pipeline (14).
9. The apparatus for gasifying liquid ammonia according to claim 8, wherein: a check valve (32) is arranged on the bleed air pipe (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322514115.XU CN220891848U (en) | 2023-09-15 | 2023-09-15 | Special device for gasifying liquid ammonia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322514115.XU CN220891848U (en) | 2023-09-15 | 2023-09-15 | Special device for gasifying liquid ammonia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220891848U true CN220891848U (en) | 2024-05-03 |
Family
ID=90874217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322514115.XU Active CN220891848U (en) | 2023-09-15 | 2023-09-15 | Special device for gasifying liquid ammonia |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220891848U (en) |
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2023
- 2023-09-15 CN CN202322514115.XU patent/CN220891848U/en active Active
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