CN212537485U - Cold insulation device for liquid ammonia spherical tank - Google Patents
Cold insulation device for liquid ammonia spherical tank Download PDFInfo
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- CN212537485U CN212537485U CN202021839406.6U CN202021839406U CN212537485U CN 212537485 U CN212537485 U CN 212537485U CN 202021839406 U CN202021839406 U CN 202021839406U CN 212537485 U CN212537485 U CN 212537485U
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Abstract
The utility model relates to a technical field of liquid ammonia spherical tank cold insulation structure, concretely relates to cold insulation device for liquid ammonia spherical tank. The liquid ammonia spherical shell is fixedly installed through an equatorial tangent column type support, heating needles are uniformly distributed on the outer side wall of the liquid ammonia spherical shell, a flexible cold insulation layer, a second cold insulation layer and a moisture-proof layer are sequentially distributed outside the liquid ammonia spherical shell, a cooling chamber is formed between the flexible cold insulation layer and the second cold insulation layer at intervals, and a temperature detector and an elastic supporting mechanism for supporting the side walls of the two sides of the cooling chamber are arranged in the cooling chamber; the air inlet of the cooling chamber is communicated with an air outlet of air through an air inlet pipeline, the air outlet of the cooling chamber is communicated with an air inlet of an air machine through an air outlet pipeline, a first valve is arranged on the air inlet pipeline, and a second valve is arranged on the air outlet pipeline. Can be discontinuous in the transportation bleed, aerify the cooling to the cooling chamber, prevent that the cold volume in the liquid ammonia spherical shell from scattering and disappearing, solved the heat preservation problem of liquid ammonia spherical tank.
Description
Technical Field
The utility model relates to a technical field of liquid ammonia spherical tank cold insulation structure, concretely relates to cold insulation device for liquid ammonia spherical tank.
Background
At present, the cold insulation material of the liquid ammonia storage tank is usually selected from polyurethane foam, and the product belongs to B1 flame-retardant materials. The conflagration operating mode of liquid ammonia spherical tank, the volume of releasing of relief valve need be considered according to no cold insulation layer operating mode, and the relief valve body imports and exports the pipeline, and the ammonia torch all needs the increase, and the cost of liquid ammonia storage tank is very high.
Foam glass is adopted as a cold insulation material of some spherical tanks, and can reach the standard of A-type non-combustible materials, but the foam glass is high in manufacturing cost and high in self density, so that the construction is difficult, multiple joints are easily caused, the cold leakage amount is easy, and the popularization is difficult in project application.
Because the liquid ammonia temperature is very low, even at liquid ammonia storage tank surface coating insulation material, the difference in temperature of insulation material both sides is also great, at the in-process of long-time transportation liquid ammonia storage tank, causes the inside cold volume of liquid ammonia storage tank to scatter and disappear easily. If the temperature difference between the two sides of the heat-insulating material is reduced, the cold insulation time of the liquid ammonia storage tank can be greatly prolonged; in addition, the equipment work efficiency of making the liquid ammonia storage tank at present is low, is usually that the manual work sets up the multilayer cold insulation material on liquid ammonia storage tank casing, and degree of automation is low, and work efficiency is slow. Therefore, there is a need for improvement of the prior art to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
Weak point to prior art exists, the utility model provides a cold insulation device for liquid ammonia spherical tank solves the technical problem that the heat preservation device who uses liquid ammonia spherical tank among the prior art is inconvenient, the heat preservation effect is poor.
The specific technical scheme is as follows:
a cold insulation device for a liquid ammonia spherical tank comprises a liquid ammonia spherical shell 14, the liquid ammonia spherical shell 14 is fixedly installed through an equator tangent column type support 8,
the outer side wall of the liquid ammonia spherical shell 14 is uniformly provided with heating needles 13, the outside of the liquid ammonia spherical shell 14 is sequentially provided with a flexible cold insulation layer 3, a two-stage cold insulation layer 7 and a moisture-proof layer 5, and the flexible cold insulation layer 3 is fixedly installed through the heating needles 13 and the liquid ammonia spherical shell 14;
a cooling chamber 10 is formed between the flexible cold insulation layer 3 and the two cold insulation layers 7 at intervals, and a temperature detector 1 and an elastic pipe supporting mechanism for supporting the side walls of the two sides of the cooling chamber 10 are arranged in the cooling chamber 10;
the two sections of cold insulation layers 7 are bonded with the moisture-proof layer 5, and a steel belt mechanism is bound outside the moisture-proof layer 5;
the elastic tube supporting mechanism comprises a pair of circular fixed frames 11 with hinged upper ends, elastic tubes 12 are arranged in each fixed frame in parallel at equal intervals, the pair of circular fixed frames 11 are closed, and the circle centers of the pair of circular fixed frames 11 are coincided with the sphere center of a liquid ammonia spherical shell 14, so that the elongated elastic tubes 12 are uniformly distributed in the cooling chamber 10;
the air inlet of the cooling chamber 10 is communicated with the air outlet of the air machine 2 through an air inlet pipeline 17, the air outlet of the cooling chamber 10 is communicated with the air inlet of the air machine 2 through an air outlet pipeline 18, a first valve 15 is arranged on the air inlet pipeline 17, and a second valve 16 is arranged on the air outlet pipeline 18.
Further, the steel band mechanism includes more than 4 radial line steel bands and 1 weft steel band, and the both ends of the more than 4 radial line steel bands are respectively through the corresponding end axle fixed mounting of a pair of movable ring 9 and liquid ammonia ball casing 14 for dampproof course 5 is tied up tightly fixedly.
Further, the pair of circular fixing frames 11 are hollow pipes, air holes are uniformly formed in each hollow pipe, the air inlet pipeline 17 is communicated with one circular fixing frame, and the air outlet pipeline 18 is communicated with the other circular fixing frame.
The utility model has the advantages of as follows:
(1) the utility model discloses a cold insulation device for liquid ammonia spherical tank, set gradually flexible cold insulation layer, two-stage segment cold insulation layer and dampproof course outside liquid ammonia spherical shell, with low costs, cold insulation is effectual;
compressed gas is filled into the cooling chamber, the gas expansion heat absorption principle is utilized, the temperature difference of two sides of the flexible cold insulation layer is reduced, the cold insulation effect is further enhanced, the liquid ammonia spherical tank cannot be opened when the liquid ammonia spherical tank is transported for a long time, the two sides of the flexible cold insulation layer can be controlled to be always at lower temperature through the air machine, and the cold insulation time is prolonged;
(2) the utility model discloses evenly lay the heating needle at the lateral wall of liquid ammonia spherical shell body, lay the elastic tube on through a pair of circular fixed frame, closed a pair of circular fixed frame, make flexible cold insulation layer and liquid ammonia spherical shell body heat bonding, the process is simple and convenient, be fit for continuity of operation, carry out the packing on cold insulation layer to a plurality of liquid ammonia spherical tanks in succession, can be through injecting into compressed air rapid cooling in the cooling chamber after the bonding, produce too much heat when preventing to melt flexible cold insulation layer and cause the interior temperature of liquid ammonia spherical tank to rise, solve the cold insulation problem of liquid ammonia spherical tank.
Drawings
Fig. 1 is a schematic structural view of a cold insulation device of the present invention.
Fig. 2 is a schematic cross-sectional view of fig. 1.
Fig. 3 is a schematic structural view of the cooling chamber air-supplying machine of the present invention.
Fig. 4 is a schematic mechanism diagram of the steel belt mechanism of the present invention.
Fig. 5 is a state diagram of the pair of circular fixing frames of the present invention when horizontally unfolded.
Wherein: 1-a temperature monitor; 2-an air machine; 3-flexible cold insulation layer; 4-reinforcing steel bars; 5-a moisture barrier; 6-air outlet pipe; 7-two sections of cold insulation layers; 8-supporting legs; 9-a pair of movable rings; 10-a cooling chamber; 11-a pair of circular fixed frames; 12-an elastic tube; 13-a heating needle; 14-liquid ammonia sphere housing 14; 15-valve I; 16-valve II; 17-an air inlet pipe; and 18-an air outlet pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.
Examples
A cold insulation device for a liquid ammonia spherical tank comprises a liquid ammonia spherical shell 14, the liquid ammonia spherical shell 14 is fixedly installed through an equator tangent column type support 8,
evenly laid heating needle 13 on the lateral wall of liquid ammonia spherical shell 14, and liquid ammonia spherical shell 14 has laid flexible cold insulation layer 3, two-stage segment cold insulation layer 7 and dampproof course 5 outward in proper order, and dampproof course 5 can prevent that the liquid ammonia spherical tank from weing. The second cold insulation layer 7 adopts glass fiber needled felt which is a flexible non-combustible heat insulation material, is closed, fine and solid, is convenient to construct, and can achieve the effects of smoke isolation, heat insulation and cold insulation and guarantee of non-combustion of the cold insulation layer under the working condition of fire. The flexible cold insulation layer 3 is made of foam rubber and plastic materials, is low in price and convenient to construct.
The flexible cold insulation layer 3 is fixedly installed through a heating needle 13 and a liquid ammonia ball shell 14;
a cooling chamber 10 is formed between the flexible cold insulation layer 3 and the two cold insulation layers 7 at intervals, and a temperature detector 1 and an elastic pipe supporting mechanism for supporting the side walls of the two sides of the cooling chamber 10 are arranged in the cooling chamber 10; elastic tube supporting mechanism includes a pair of circular fixed frame 11 of upper end articulated, and the equidistant parallel elastic tube 12 of having laid in every fixed frame, closed a pair of circular fixed frame 11, the centre of a circle of a pair of circular fixed frame 11 and the coincidence of the centre of sphere of liquid ammonia ball casing 14 for the surface evenly distributed that corresponds flexible cold insulation layer 3 in the cooling chamber 10 is the elastic tube 12 of extension.
The two sections of cold insulation layers 7 are bonded with the moisture-proof layer 5, and a steel belt mechanism is bound outside the moisture-proof layer 5;
the steel band mechanism includes more than 4 radial line steel bands and 1 weft steel band, and the both ends of the more than 4 radial line steel bands are respectively through the corresponding end axle fixed mounting of a pair of movable ring 9 and liquid ammonia ball casing 14 for dampproof course 5 is tied up tightly fixedly.
The air inlet of the cooling chamber 10 is communicated with the air outlet of the air machine 2 through an air inlet pipeline 17, the air outlet of the cooling chamber 10 is communicated with the air inlet of the air machine 2 through an air outlet pipeline 18, a first valve 15 is arranged on the air inlet pipeline 17, and a second valve 16 is arranged on the air outlet pipeline 18.
The pair of circular fixing frames 11 are hollow pipes, air holes are uniformly formed in each hollow pipe, the air inlet pipeline 17 is communicated with one circular fixing frame, and the air outlet pipeline 18 is communicated with the other circular fixing frame.
The utility model also comprises a preparation method of the cold insulation device for the liquid ammonia spherical tank, which comprises the following steps,
step S1: initially, set up a pair of circular fixed frame 11 in the upper end of liquid ammonia ball casing 14, and a pair of circular fixed frame 11 level expandes, equipartition interval level has laid elastic tube 12 on every circular fixed frame, and the lower terminal surface of every circular fixed frame has all laid the flexible layer of foam rubber and plastic, and the surfacing of flexible layer.
Step S2: the pair of circular fixing frames 11 are closed downwards, so that the centers of circles of the pair of circular fixing frames 11 are overlapped with the center of a sphere of the liquid ammonia sphere shell 14, the flexible layer presses the heating needle 13 on the surface of the liquid ammonia sphere shell 14, the heating needle 13 is pressed to conduct self-heating, when the temperature of the heating needle 13 reaches 65 ℃, the flexible layer and the heating needle 13 are thermally bonded, and the heating needle 13 stops conducting self-heating; then a pair of circular fixed frames 11 can be heated through resistance wires, when the temperature of the pair of circular fixed frames 11 reaches 65 ℃, the flexible layers on the pair of circular fixed frames 11 are thermally bonded at the joint to form a complete flexible cold insulation layer 3 covering the outside of the liquid ammonia spherical shell 14, the elastic tube 12 is in an extension state, the elastic tube 12 is in close contact with the flexible cold insulation layer 3, and the elastic tube 12 exerts pressure on the flexible cold insulation layer 3 under the elastic action, so that the flexible cold insulation layer 3 is tightly attached to the surface of the liquid ammonia spherical shell 14, and the cold insulation effect is further enhanced.
Controlling the heating time of the pair of circular fixing frames 11 to be 10-20 min; the flexible layer is made of foam plastic, and becomes soft at the temperature of more than 50 ℃ and can be melted at the temperature of more than 60 ℃.
Step S3: the outer side of the elastic tube 12 is sequentially provided with a second cold insulation layer 7 and a moisture-proof layer 5, so that the spacing distance between the second cold insulation layer 7 and the flexible cold insulation layer 3 is the diameter of the elastic tube 12, and the diameter of the elastic tube 12 is 1-10 mm;
step S5: more than 4 radial steel belts are uniformly bound outside the moisture-proof layer 5, weft steel belts are bound on the circumference of the equator of the moisture-proof layer 5, the upper ends of the more than 4 radial steel belts are fixedly installed through an upper movable ring 9 and an upper end shaft of a liquid ammonia spherical shell 14, and the lower ends of the radial steel belts are fixedly installed through a lower movable ring 91 and a lower end shaft of the liquid ammonia spherical shell 14, so that the moisture-proof layer 5 is bound and fixed;
step S5: the first valve 15 and the second valve 16 are closed, and the temperature detector 1 monitors the temperature in the cooling chamber 10 in real time;
when the temperature in the cooling chamber 10 is higher than T, the first valve 15 is opened, compressed gas is injected into the cooling chamber 10 from the air outlet of the air machine 2 through the air inlet pipe 17, the compressed gas in the cooling chamber 10 expands to absorb heat, and the temperature in the cooling chamber 10 is reduced;
when the air pressure in the cooling chamber 10 is more than P2, the second valve 16 is opened, the first valve 15 is closed, and the air is discharged to the air inlet of the air machine 2;
the pressure of the compressed gas is P1, and the atmospheric pressure is less than P2 and less than P1.
In this embodiment, P2 is 1.10 × 105Pa, P1 is 2 × 105Pa, which ensures that the air entering the cooling chamber 10 from the air machine 2 absorbs heat, and since the air pressure in the cooling chamber 10 is the maximum atmospheric pressure when no air is introduced, as long as the air pressure of the air introduced into the air machine 2 is greater than the atmospheric pressure, the air pressure of the air introduced into the cooling chamber 10 can be ensured to decrease and expand in volume, which ensures that the air absorbs heat, and the gas with the air pressure of P1 in the air machine 2 can be set as inert gas, which makes the heat conduction effect of the inert gas worse.
T sets up to 250K, because the liquid ammonia temperature is generally below 240K, does not have any cold insulation material absolute cold insulation, and the flexible cold insulation layer 3 both sides difference in temperature is big, and cold insulation effect is poor, if the temperature of cooling chamber 10 is too high, even there is flexible cold insulation layer 3's existence, the liquid ammonia in the liquid ammonia spherical tank also takes place the heat exchange very easily and reduces cold insulation effect. In the transportation process, the cooling chamber 10 can be intermittently pumped and inflated for cooling, so that the cold quantity in the liquid ammonia spherical shell 14 is prevented from being lost due to overlarge temperature difference at two sides of the flexible cold insulation layer 3.
The utility model discloses a heating needle 13 can refer to a needle point patent that possesses pressure measurement function and preparation method and a heating needle device patent design that patent number is CN201720967304.4 that patent number is CN201910349282.9, set up pressure sensor with needle point department, pressure sensor receives the heating of needle point department when pressure, heating needle 13 can set up to including the needle point, the spring switch who is connected with the needle point and the needle tubing of being connected with spring switch, the needle tubing is connected with liquid ammonia ball casing 14, be provided with heating device on the needle point, when flexible protective layer 3 and needle point contact, the needle point receives decurrent power, the spring in the spring switch is compressed, spring switch opens, the heating device of control needle point department starts, the needle point melts flexible cold-proof layer 3.
Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will understand that the present invention can be modified or replaced with other embodiments without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (3)
1. The utility model provides a cold insulation device for liquid ammonia spherical tank, includes liquid ammonia spherical shell (14), liquid ammonia spherical shell (14) are through equator tangent column type support (8) fixed mounting, its characterized in that:
the outer side wall of the liquid ammonia spherical shell (14) is uniformly provided with heating needles (13), the liquid ammonia spherical shell (14) is sequentially provided with a flexible cold insulation layer (3), a two-stage cold insulation layer (7) and a moisture-proof layer (5), and the flexible cold insulation layer (3) is fixedly installed through the heating needles (13) and the liquid ammonia spherical shell (14);
a cooling chamber (10) is formed between the flexible cold insulation layer (3) and the two cold insulation layers (7) at intervals, and a temperature detector (1) and an elastic pipe supporting mechanism for supporting the side walls of the two sides of the cooling chamber (10) are arranged in the cooling chamber (10);
the two sections of cold insulation layers (7) are bonded with the moisture-proof layer (5), and a steel belt mechanism is bound outside the moisture-proof layer (5);
the elastic tube supporting mechanism comprises a pair of circular fixing frames (11) with hinged upper ends, elastic tubes (12) are arranged in each fixing frame in parallel at equal intervals, the pair of circular fixing frames (11) are closed, and the circle centers of the pair of circular fixing frames (11) are coincided with the sphere center of a liquid ammonia spherical shell (14), so that the elongated elastic tubes (12) are uniformly distributed in the cooling chamber (10);
the air inlet of the cooling chamber (10) is communicated with the air outlet of the air machine (2) through an air inlet pipeline (17), the air outlet of the cooling chamber (10) is communicated with the air inlet of the air machine (2) through an air outlet pipeline (18), a first valve (15) is arranged on the air inlet pipeline (17), and a second valve (16) is arranged on the air outlet pipeline (18).
2. The cold insulation device for the liquid ammonia spherical tank of claim 1, wherein: the steel band mechanism comprises more than 4 radial line steel bands and 1 weft line steel band, and the two ends of the more than 4 radial line steel bands are fixedly installed through corresponding end shafts on a pair of movable rings (9) and the liquid ammonia spherical shell (14) respectively, so that the moisture-proof layer (5) is tightly bound and fixed.
3. The cold insulation device for the liquid ammonia spherical tank of claim 1, wherein: the pair of circular fixing frames (11) are hollow pipes, air holes are uniformly formed in each hollow pipe, the air inlet pipeline (17) is communicated with one circular fixing frame, and the air outlet pipeline (18) is communicated with the other circular fixing frame.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021839406.6U CN212537485U (en) | 2020-08-28 | 2020-08-28 | Cold insulation device for liquid ammonia spherical tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021839406.6U CN212537485U (en) | 2020-08-28 | 2020-08-28 | Cold insulation device for liquid ammonia spherical tank |
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| CN212537485U true CN212537485U (en) | 2021-02-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111981311A (en) * | 2020-08-28 | 2020-11-24 | 东华工程科技股份有限公司 | Cold insulation device for liquid ammonia spherical tank and preparation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111981311A (en) * | 2020-08-28 | 2020-11-24 | 东华工程科技股份有限公司 | Cold insulation device for liquid ammonia spherical tank and preparation method |
| CN111981311B (en) * | 2020-08-28 | 2024-06-14 | 东华工程科技股份有限公司 | Cold insulation device for liquid ammonia spherical tank and preparation method |
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