Liquid ammonia storage device

Abstract

The utility model discloses a liquid ammonia storage device, and belongs to the technical field of organic synthesis. Comprising a concrete foundation and a steel tank body, the steel tank body comprises a tank bottom, a tank top, a hanging flat top and a side wall, the tank bottom is arranged on the concrete foundation, a tank bottom heat preservation layer is arranged between the tank bottom and the concrete foundation, a side wall heat preservation layer and a protection layer are sequentially arranged outside the side wall, a flat top heat preservation layer is arranged on the upper side of the hanging flat top, and the bottom end of the protection layer is fixed to the concrete foundation; the tank bottom thermal insulation layer sequentially comprises a felt paper layer, a foam glass layer and an asphalt paint layer from bottom to top, the felt paper layer is formed by soaking asphalt with felt paper, and the foam glass layer is built by foam glass blocks; the side wall heat preservation layer sequentially comprises an anti-rust coating layer, a first PV abrasion-resistant coating layer, a first rigid polyurethane foam layer and a waterproof grease and glass wool cloth composite layer from inside to outside. The flat-top thermal insulation layer sequentially comprises a second PV wear-resistant coating layer and a second rigid polyurethane foam layer from bottom to top; the first rigid polyurethane foam layer and the second rigid polyurethane foam layer are both built by rigid polyurethane foam blocks.

Description

Technical Field

[0001] This utility model belongs to the field of organic synthesis technology, and specifically relates to a liquid ammonia storage device. Background Technology

[0002] Ammonia, as an important chemical raw material, is often processed from gaseous ammonia into liquid ammonia for convenient transportation and storage. Liquid ammonia has wide industrial applications, but it is corrosive and volatile, resulting in a high rate of chemical accidents. Therefore, factories often construct full-containment tank systems to store liquid ammonia, thereby improving safety. Existing liquid ammonia storage devices have two structures: a single-shell external cooling structure and a double-shell sandwich structure, as detailed in the following patents:

[0003] For example, patent application number CN202321600462.8 discloses a novel liquid ammonia single-containment tank, including a mounting base plate, a concrete equalizing plate, a foam glass plate, a middle plate of the base plate, foam glass bricks, a waterproof layer, wall panels, a pressure-bearing ring, an outer cylinder top plate, glass wool, hangers, connecting pipes, and a cooling mechanism. The top of the mounting base plate is connected to the concrete equalizing plate, the middle of the mounting base plate is connected to the foam glass plate, the top of the foam glass plate is connected to the middle plate, the foam glass bricks are connected to the concrete equalizing plate, the outer side of the foam glass bricks is connected to the waterproof layer, the inner side of the foam glass bricks is connected to the wall panels, the top of the foam glass bricks is connected to the pressure-bearing ring, the top of the pressure-bearing ring is connected to the outer cylinder top plate, glass wool is connected to the pressure-bearing ring, multiple hangers are connected between the glass wool and the outer cylinder top plate, multiple balance holes are opened on the glass wool, multiple connecting pipes are connected to the upper sides of the left and right sides of the outer cylinder top plate, and a cooling mechanism for spraying water to cool the waterproof layer is provided on the mounting base plate.

[0004] For example, patent application number CN202110820082.4 discloses a liquid ammonia cryogenic full-containment storage tank structure, including: a concrete foundation, pre-placed in the stratum; an inner tank body, disposed on the concrete foundation; an outer tank body, sleeved outside the inner tank body and disposed on the concrete foundation; an energy-absorbing platform mechanism, the energy-absorbing platform mechanism being fixed on the concrete foundation for supporting the inner tank body and the outer tank body; and a temperature insulation and control component, disposed in the gap between the inner tank body and the outer tank body for insulating the inner tank body from the outer tank body and for auxiliary temperature and pressure control of the inner tank body. The temperature insulation and control assembly includes: an inner reinforcing ring layer attached to the outer surface of the inner tank; an outer heat insulation ring layer attached to the inner surface of the outer tank; and at least two spaced-apart support rings supporting the inner reinforcing ring layer and the outer heat insulation ring layer; and a control space is formed between two adjacent support rings, the inner reinforcing ring layer, and the outer heat insulation ring layer; the control space is provided with an inner support ring and an outer liquid-separating ring, wherein the inner support ring is attached to the outer surface of the inner reinforcing ring layer; and the outer liquid-separating ring is attached to the inner surface of the outer heat insulation ring layer. The inner reinforcing ring layer includes two ring layers one, which are filled with foam glass bricks and support pads in a crisscross pattern from top to bottom, and the outermost ring layer one has a mesh structure. The outer heat insulation ring layer includes two ring layers two, which are filled with foam glass bricks and support pads in a crisscross pattern from top to bottom, and each foam glass brick is embedded with dense perlite.

[0005] In existing technologies, foam glass bricks are used as the insulation layer. However, foam glass bricks are not only expensive and difficult to install, but also have a high density, which puts a greater burden on the steel tank. Utility Model Content

[0006] To address the aforementioned problems, this utility model provides a liquid ammonia storage device, employing a single-shell external cooling structure, which is cost-effective and easy to construct. Different insulation layers are used for different parts, further reducing costs. The resulting liquid ammonia storage device meets usage requirements. The technical solution is as follows:

[0007] This utility model provides a liquid ammonia storage device, including a concrete foundation 1 and a steel tank. The steel tank includes a tank bottom 2, a tank top 3, a suspended flat roof 4, and side walls 5. The tank bottom 2 is placed on the concrete foundation 1, and a tank bottom insulation layer 6 is provided between the tank bottom 2 and the concrete foundation 1. A side wall insulation layer 7 and a protective layer 8 are sequentially provided on the outside of the side walls 5. A flat roof insulation layer 9 is provided on the upper side of the suspended flat roof 4. The bottom end of the protective layer 8 is fixed to the concrete foundation 1. The tank bottom insulation layer 6 consists of, from bottom to top, tar paper. The insulation layer consists of a layer of asphalt paper, a layer of foam glass, and a layer of asphalt paint. The asphalt paper layer is formed by impregnating asphalt with asphalt, and the foam glass layer is made of foam glass blocks. The side wall insulation layer 7 consists of, from the inside out, an anti-rust coating layer, a first PV wear-resistant coating layer, a first rigid polyurethane foam layer, and a composite layer of waterproof grease and fiberglass cloth. The flat roof insulation layer 9 consists of, from the bottom up, a second PV wear-resistant coating layer and a second rigid polyurethane foam layer. Both the first and second rigid polyurethane foam layers are made of rigid polyurethane foam blocks.

[0008] In this embodiment of the invention, the thickness of the foam glass layer, the first rigid polyurethane foam layer, and the second rigid polyurethane foam layer is 18-25 cm.

[0009] Specifically, in this embodiment of the present invention, the thickness of the foam glass layer, the first rigid polyurethane foam layer, and the second rigid polyurethane foam layer is 20cm. The foam glass layer is composed of two layers of foam glass blocks with a thickness of 10cm, and the first rigid polyurethane foam layer and the second rigid polyurethane foam layer are both composed of two layers of rigid polyurethane foam blocks with a thickness of 10cm.

[0010] More specifically, the specifications of the foam glass block and the rigid polyurethane foam block in the embodiments of this utility model are both 500mm*450mm*100mm.

[0011] In this embodiment of the invention, the foam glass blocks and the rigid polyurethane foam blocks are bonded and fixed together with FG cryogenic adhesive, with a coating rate of 100%.

[0012] Furthermore, in this embodiment of the present invention, the gap between the outer edge of the bottom insulation layer 6 and the inner side of the corresponding side wall insulation layer 7 is filled with mastic-impregnated glass wool 10, and the gap between the outer edge of the flat top insulation layer 9 and the inner side of the corresponding side wall 5 is filled with film-wrapped glass wool 11.

[0013] In this embodiment of the invention, the density of the foam glass block is 140-180 kg / m³. 3 The compressive strength is greater than or equal to 0.5 MPa; the density of the rigid polyurethane foam block is 30-50 kg / m³. 3 The compressive strength is greater than or equal to 0.2 MPa.

[0014] In this embodiment of the invention, the asphalt paint layer is formed by applying two coats of asphalt paint.

[0015] In this embodiment of the invention, the anti-rust coating layer is formed by applying two coats of iron oxide alkyd paint. The thickness of the first PV wear-resistant coating layer and the second PV wear-resistant coating layer is 1.5-3.0 mm. The waterproof grease and glass cloth composite layer consists of three glass cloth layers and two mastic layers, with a mastic layer between adjacent glass cloth layers. The thickness of the mastic layer is 2-5 mm.

[0016] The beneficial effects of the technical solution provided by this utility model embodiment are as follows: This utility model embodiment provides a liquid ammonia storage device, which adopts a single-shell external cold-resistant structure, resulting in lower costs and easier construction; different structures are used for the insulation layer in different parts, further reducing costs, and the manufactured liquid ammonia storage device meets the usage requirements. Specifically, rigid polyurethane foam blocks are used for the tank top and side walls, which are lower in cost, have lower density, and are easier to construct; at the same time, other structures are added to ensure strength, waterproofing, and durability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the liquid ammonia storage device in this embodiment;

[0018] Figure 2 yes Figure 1 A magnified view of a section at the junction of the bottom and sidewall of the tank;

[0019] Figure 3 yes Figure 1 A magnified view of the junction between the suspended ceiling and the side wall.

[0020] In the diagram: 1 Concrete foundation, 2 Tank bottom, 3 Tank top, 4 Suspended flat roof, 5 Side wall, 6 Tank bottom insulation layer, 7 Side wall insulation layer, 8 Protective layer, 9 Flat roof insulation layer, 10 Mastic-impregnated glass wool, 11 Glass wool wrapped in film. Detailed Implementation

[0021] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0022] Example 1

[0023] See Figure 1-3Example 1 provides a liquid ammonia storage device, including a concrete foundation 1 and a steel tank. The concrete foundation 1 is horizontal. The steel tank is made of 16MnDR, and its design conforms to SH3046-92 and HGJ19-89, while its construction conforms to GBJ128-90 and HGJ210-1983. The steel tank is circular and includes a tank bottom 2, a tank top 3, a suspended flat roof 4, and side walls 5. The tank bottom 2 is located at the bottom, is horizontal, and is circular. The tank top 3 is located at the top and arches upwards; the suspended flat roof 4 is located at the upper part, is horizontal, and is circular. The side walls 5 are vertically arranged cylindrical structures.

[0024] The tank bottom 2 is placed on a concrete foundation 1 (a ring beam is installed as needed, in a manner consistent with existing technology), and a tank bottom insulation layer 6 is provided between the tank bottom 2 and the concrete foundation 1. The tank bottom insulation layer 6 consists of, from bottom to top, an asphalt paper layer, a foam glass layer, and an asphalt paint layer. The asphalt paper layer is formed by impregnating asphalt paper with asphalt, and the foam glass layer is formed by assembling foam glass blocks. The asphalt paint layer is formed by applying two coats of asphalt paint, resulting in a smooth surface without bubbles.

[0025] The side wall 5 is sequentially equipped with a side wall insulation layer 7 and a protective layer 8. The bottom end of the protective layer 8 is fixed to the concrete foundation 1, and it is made of a rigid material (such as a steel plate). The side wall insulation layer 7 consists of, from the inside out, an anti-rust coating layer, a first PV wear-resistant coating layer, a first rigid polyurethane foam layer, and a waterproof grease and fiberglass cloth composite layer. The anti-rust coating layer is formed by applying two coats of iron oxide alkyd paint, resulting in a smooth surface without bubbles. The thickness of the first PV wear-resistant coating layer is 1.5-3.0 mm. The first rigid polyurethane foam layer is constructed from rigid polyurethane foam blocks. The waterproof grease and fiberglass cloth composite layer consists of three layers of fiberglass cloth and two layers of mastic, with a mastic layer between adjacent layers of fiberglass cloth. The thickness of the mastic layer is 2-5 mm.

[0026] The upper side of the suspended ceiling 4 is provided with a flat ceiling insulation layer 9, which consists of a second PV wear-resistant coating layer and a second rigid polyurethane foam layer from bottom to top. The thickness of the second PV wear-resistant coating layer is 1.5-3.0mm, and the second rigid polyurethane foam layer is made of rigid polyurethane foam blocks.

[0027] In this embodiment of the invention, the thickness of the foam glass layer, the first rigid polyurethane foam layer, and the second rigid polyurethane foam layer is 18-25cm to ensure the heat insulation effect.

[0028] Specifically, in this embodiment of the present invention, the thickness of the foam glass layer, the first rigid polyurethane foam layer, and the second rigid polyurethane foam layer is 20cm. The foam glass layer is made up of two 10cm thick foam glass blocks (the seams of the upper and lower layers are staggered). The first rigid polyurethane foam layer and the second rigid polyurethane foam layer are both made up of two 10cm thick rigid polyurethane foam blocks (the seams of the upper and lower layers are staggered).

[0029] More specifically, in this embodiment of the invention, the foam glass blocks and the rigid polyurethane foam blocks are bonded and fixed together using FG cryogenic adhesive, with a 100% adhesive application rate. The specifications of the foam glass blocks and the rigid polyurethane foam blocks are shown in Table 1.

[0030] Table 1

[0031]

[0032] Furthermore, in this embodiment of the present invention, the gap between the outer edge (which is irregularly shaped) of the bottom insulation layer 6 and the inner side of the corresponding side wall insulation layer 7 is filled with mastic-impregnated glass wool 10, and the gap between the outer edge (which is irregularly shaped) of the flat top insulation layer 9 and the inner side of the corresponding side wall 5 is filled with film-wrapped glass wool 11.

[0033] Example 2

[0034] Example 2 provides a liquid ammonia storage device, the structure of which is basically the same as that of Example 1, except that: the specifications of the foam glass block and the rigid polyurethane foam block in this example are both 500mm*450mm*100mm. The thickness of the first PV wear-resistant coating layer and the second PV wear-resistant coating layer is 2.0mm. The thickness of the mastic layer is 3mm. The specification of the glass fiber cloth layer is 10*10 mesh.

[0035] Example 3

[0036] Example 3 provides a liquid ammonia storage device, the structure of which is basically the same as that of Example 2, except that the diameter of the liquid ammonia storage device in this example is 21.6m and the solvent is 8000m. 3 The indicators are shown in Table 2:

[0037] Table 2

[0038]

[0039] As can be seen from Table 2, the liquid ammonia storage device of this patent meets the design and usage requirements.

[0040] Example 4

[0041] Example 4 provides a liquid ammonia storage device, the structure of which is basically the same as that of Example 2, except that: in this example, the tank bottom 2 extends 100mm inward relative to the side wall 5, and the bottom of the protective layer 8 protrudes outward at the tank bottom 2. The lower part of the protrusion is provided with two layers of rigid polyurethane foam blocks, and the upper part is provided with three layers of rigid polyurethane foam blocks.

[0042] In this embodiment, "first" and "second" serve only as distinctions and have no other special meaning.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A liquid ammonia storage device comprising a concrete foundation (1) and a steel tank body, the steel tank body comprising a tank bottom (2), a tank top (3), a flat roof (4) and a side wall (5), the tank bottom (2) being placed on the concrete foundation (1) and a tank bottom insulation layer (6) being provided between the tank bottom (2) and the concrete foundation (1), the side wall (5) being provided with a side wall insulation layer (7) and a protective layer (8) in sequence from outside, the upper side of the flat roof (4) being provided with a flat roof insulation layer (9), and the bottom end of the protective layer (8) being fixed on the concrete foundation (1); characterized in that, the tank bottom insulation layer (6) comprises, from bottom to top, an oil felt paper layer, a foamed glass layer and an asphalt paint layer, the foamed glass layer being formed by foamed glass blocks; the side wall insulation layer (7) comprises, from inside to outside, a rust-proof paint layer, a first PV wear-resistant paint layer, a first rigid polyurethane foam layer and a waterproof grease and glass cloth composite layer; the flat roof insulation layer (9) comprises, from bottom to top, a second PV wear-resistant paint layer and a second rigid polyurethane foam layer; the first rigid polyurethane foam layer and the second rigid polyurethane foam layer are each formed by rigid polyurethane foam blocks.

2. The liquid ammonia storage device of claim 1, wherein The thickness of the foamed glass layer, the first rigid polyurethane foam layer and the second rigid polyurethane foam layer is 18-25 cm.

3. The liquid ammonia storage apparatus according to claim 1, characterized by The thickness of the foamed glass layer, the first rigid polyurethane foam layer and the second rigid polyurethane foam layer is 20 cm, the foamed glass layer is formed by two foamed glass blocks each having a thickness of 10 cm, and the first rigid polyurethane foam layer and the second rigid polyurethane foam layer are each formed by two rigid polyurethane foam blocks each having a thickness of 10 cm.

4. The liquid ammonia storage apparatus according to claim 3, characterized by The specifications of the foamed glass blocks and the rigid polyurethane foam blocks are each 500 mm*450 mm*100 mm.

5. The liquid ammonia storage apparatus according to claim 3, wherein The foamed glass blocks and the rigid polyurethane foam blocks are each fixed by FG cryogenic adhesive with a gluing rate of 100%.

6. The liquid ammonia storage apparatus of claim 1, wherein The density of the foam glass block is 140-180 kg / m 3 , and the compressive strength is greater than or equal to 0.5 MPa; the density of the rigid polyurethane foam block is 30-50 kg / m 3 , and the compressive strength is greater than or equal to 0.2 MPa.

7. The liquid ammonia storage apparatus of claim 1, wherein The asphalt paint layer is formed by brushing two coats of asphalt paint.

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