Mixed refrigeration device for natural gas liquefaction

Abstract

The utility model relates to the technical field of natural gas liquefaction, in particular to a mixed refrigeration device for natural gas liquefaction, which comprises a first refrigeration box, a second refrigeration box, a threaded rod, a natural gas cooling component, a circulating pipe and a sliding opening, an aeration pipe is arranged on the upper side of the aeration disc, an air pump is installed at one end of the aeration pipe, a first refrigerant leading-in pipe is arranged on the upper side of the first refrigeration box, a first refrigerant leading-out pipe is arranged on the lower side of the first refrigeration box, and a second refrigerant leading-in pipe is arranged on the upper side of the second refrigeration box. According to the design, the natural gas cooling component is refrigerated through the first refrigeration box and the second refrigeration box alternately, the utilization rate of refrigerants is increased, the refrigeration effect of natural gas is facilitated, the mixed refrigerants are aerated into the first refrigeration box or the second refrigeration box through the aeration disc, and the heat exchange speed of the refrigerants and the natural gas coil pipe is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to natural gas liquefaction technical field, concretely is a kind of mixed refrigeration device for natural gas liquefaction. BACKGROUND

[0002] Natural gas refers to all gases in nature, including the atmosphere, hydrosphere and lithosphere, and the gases formed by various natural processes, its manufacturing process is first natural gas purification treatment produced by gas field, after a series of ultra-low temperature liquefaction, using liquefied natural gas ship transportation, wherein mixed refrigeration device is used for the liquefaction operation of natural gas, for example, a kind of mixed refrigeration device for natural gas liquefaction is disclosed in Chinese patent, (grant announcement number CN216245124U), the patent technology makes transmission shaft reciprocating motion, so that stirring paddle rotates in the box body while reciprocating motion, makes the refrigerant in the box body mixing more fully, so as to improve the natural gas liquefaction efficiency in spiral pipe;

[0003] But the refrigeration device for natural gas liquefaction disclosed in the prior art still has some defects to be improved in actual application, for example:

[0004] 1, the refrigeration device for natural gas liquefaction above is cooled by continuously circulating refrigerant in the box, which leads to the temperature of refrigerant being too high, and is not conducive to the refrigeration effect of natural gas;

[0005] 2, the uniformity of refrigerant is improved by stirring, and the heat exchange speed of refrigerant and natural gas coil is low, which is not conducive to the refrigeration efficiency. Therefore, the technical personnel in the art provides a kind of mixed refrigeration device for natural gas liquefaction to solve the problems raised in the above background. INVENTION CONTENTS

[0006] The utility model aims at providing a kind of mixed refrigeration device for natural gas liquefaction to solve the problems raised in the above background.

[0007] To achieve the above object, the utility model provides the following technical scheme:

[0008] A kind of mixed refrigeration device for natural gas liquefaction, including first refrigeration box, second refrigeration box, threaded rod, natural gas cooling component, circulation pipe and sliding port, the second refrigeration box is located at the side position of first refrigeration box, the threaded rod is located at the inside position of first refrigeration box and second refrigeration box, the natural gas cooling component is located at the outside position of threaded rod, the circulation pipe is located at the side position of natural gas cooling component, the sliding port is located at the adjacent side position of first refrigeration box and second refrigeration box;

[0009] The lower end of the first refrigeration box and the second refrigeration box is provided with an aeration disc, and the upper side of the aeration disc is provided with an aeration pipe, and one end of the aeration pipe is provided with a gas pump.

[0010] As a further scheme of the utility model: the upper side of the first refrigeration box is provided with a first refrigerant inlet pipe, the lower side of the first refrigeration box is provided with a first refrigerant outlet pipe, the upper side of the second refrigeration box is provided with a second refrigerant inlet pipe, the lower side of the second refrigeration box is provided with a second refrigerant outlet pipe, and the side of the second refrigeration box is provided with a motor at the position corresponding to the threaded rod.

[0011] As a further scheme of the utility model: the natural gas cooling component comprises a coil body, the inner side of the coil body is provided with a heat exchange fin, and the lower side of the coil body is provided with a sliding block.

[0012] As a further scheme of the utility model: the outer end of the natural gas cooling component is communicated with one end of a circulating pipe, and the other end of the circulating pipe is slid at the position of the side of the second refrigeration box.

[0013] As a further scheme of the utility model: the threaded rod rotates at the inner position of the first refrigeration box and the second refrigeration box, the natural gas cooling component slides at the inner position of the sliding opening, the output end of the gas pump is communicated with the input end of the aeration pipe, and the output end of the aeration pipe is communicated with the input end of the aeration disc.

[0014] As a further scheme of the utility model: the threaded rod rotates at the inner position of the first refrigeration box and the second refrigeration box through the motor, the lower end of the first refrigerant inlet pipe is communicated with the upper end of the first refrigeration box, the lower end of the first refrigeration box is communicated with the upper end of the first refrigerant outlet pipe, the lower end of the second refrigerant inlet pipe is communicated with the upper end of the second refrigeration box, and the lower end of the second refrigeration box is communicated with the upper end of the second refrigerant outlet pipe.

[0015] As a further scheme of the utility model: the outer end of the coil body is communicated with one end of a circulating pipe, and the threaded rod rotates at the inner position of the sliding block.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] 1. A mixed refrigeration device for natural gas liquefaction, which alternately cools a natural gas cooling component through a first refrigeration box and a second refrigeration box, improves the utilization rate of refrigerant, avoids the influence of temperature rise on refrigeration of refrigerant, and is beneficial to the refrigeration effect of natural gas.

[0018] 2. A mixed refrigeration device for liquefying natural gas, which improves the contact area of the refrigerant with the natural gas cooling member, the uniformity of the refrigerant distribution, and the heat exchange speed of the refrigerant with the natural gas coil pipe by aerating the refrigerant in the first refrigeration tank or the second refrigeration tank through the aerating disc, thus being beneficial to the refrigeration efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 Fig. 1 is a structural schematic diagram of a mixed refrigeration device for liquefying natural gas;

[0020] Figure 2 Fig. 2 is a perspective view of a mixed refrigeration device for liquefying natural gas;

[0021] Figure 3 Fig. 3 is a structural schematic diagram of a mixed refrigeration device for liquefying natural gas; Figure 2 Fig. 4 is a structural schematic diagram of part A of a mixed refrigeration device for liquefying natural gas;

[0022] Figure 4 Fig. 5 is a structural schematic diagram of a natural gas cooling member in a mixed refrigeration device for liquefying natural gas.

[0023] Fig. 1 is a structural schematic diagram of a mixed refrigeration device for liquefying natural gas, Fig. 2 is a perspective view of a mixed refrigeration device for liquefying natural gas, Fig. 3 is a structural schematic diagram of a mixed refrigeration device for liquefying natural gas, Fig. 4 is a structural schematic diagram of part A of a mixed refrigeration device for liquefying natural gas, Fig. 5 is a structural schematic diagram of a natural gas cooling member in a mixed refrigeration device for liquefying natural gas, wherein 1 is a first refrigeration tank, 2 is a second refrigeration tank, 3 is a threaded rod, 4 is a natural gas cooling member, 5 is a circulating pipe, 6 is a sliding port, 7 is an aerating disc, 8 is an aerating pipe, 9 is a gas pump, 10 is a first refrigerant introduction pipe, 11 is a first refrigerant discharge pipe, 12 is a second refrigerant introduction pipe, 13 is a second refrigerant discharge pipe, 14 is a motor, 15 is a coil pipe body, 16 is a heat exchange fin, and 17 is a sliding block. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] Please refer to Figures 1 to 4The utility model discloses a mixed refrigeration device for natural gas liquefaction, including first refrigeration box 1, second refrigeration box 2, threaded rod 3, natural gas cooling component 4, circulating pipe 5 and sliding mouth 6, second refrigeration box 2 is located the position at the side of first refrigeration box 1, threaded rod 3 is located the inside position at first refrigeration box 1 and second refrigeration box 2, natural gas cooling component 4 is located the outside position at threaded rod 3, circulating pipe 5 is located the position at the side of natural gas cooling component 4, and sliding mouth 6 is located the position at the side of first refrigeration box 1 and second refrigeration box 2, and the inside lower end position at first refrigeration box 1 and second refrigeration box 2 is all installed with aeration disc 7, and the upside of aeration disc 7 is provided with aeration pipe 8, and one end of aeration pipe 8 is installed with gas pump 9, and the outer end of natural gas cooling component 4 is through with one end of circulating pipe 5, and the other end of circulating pipe 5 slides in the position at the side of second refrigeration box 2, threaded rod 3 rotates in the inside position at first refrigeration box 1 and second refrigeration box 2, natural gas cooling component 4 slides in the inside position at sliding mouth 6, the output of gas pump 9 is through with the input of aeration pipe 8, and the output of aeration pipe 8 is through with the input of aeration disc 7, first, the output of first refrigeration box 1 and second refrigeration box 2 are connected with external refrigerant circulating equipment, and the input of first refrigeration box 1 and second refrigeration box 2 are connected with refrigerant circulating equipment, and the outer end of circulating pipe 5 is connected with external natural gas circulating equipment, then, refrigerant enters the inside of first refrigeration box 1, enters the inside of second refrigeration box 2, and the refrigerant in the inside of first refrigeration box 1 refrigerates natural gas cooling component 4, and the refrigerated natural gas is circulated through circulating pipe 5, when the refrigeration effect of the heat in the inside of first refrigeration box 1 on natural gas cooling component 4 reduces, threaded rod 3 rotates in the inside of first refrigeration box 1 and second refrigeration box 2, threaded rod 3 rotates in the lower end of natural gas cooling component 4, natural gas cooling component 4 slides into the inside of second refrigeration box 2 through sliding mouth 6, and the refrigerant in the inside of first refrigeration box 1 is discharged, and the refrigerant is introduced into the inside of first refrigeration box 1 again, and the refrigerant in the inside of second refrigeration box 2 refrigerates natural gas cooling component 4, and the refrigerated natural gas is circulated through circulating pipe 5, when the refrigeration effect of the heat in the inside of second refrigeration box 2 on natural gas cooling component 4 reduces, natural gas cooling component 4 moves to the inside of first refrigeration box 1 and refrigerates again.

[0026] In Figure 2In the middle: the upper side of the first refrigeration box 1 is provided with a first refrigerant inlet pipe 10, the lower side of the first refrigeration box 1 is provided with a first refrigerant outlet pipe 11, the upper side of the second refrigeration box 2 is provided with a second refrigerant inlet pipe 12, the lower side of the second refrigeration box 2 is provided with a second refrigerant outlet pipe 13, the side of the second refrigeration box 2 corresponds to the position of the threaded rod 3 and is provided with a motor 14, the threaded rod 3 rotates in the internal position of the first refrigeration box 1 and the second refrigeration box 2 through the motor 14, the lower end of the first refrigerant inlet pipe 10 is penetrated with the upper end of the first refrigeration box 1, the lower end of the first refrigeration box 1 is penetrated with the upper end of the first refrigerant outlet pipe 11, the lower end of the second refrigerant inlet pipe 12 is penetrated with the upper end of the second refrigeration box 2, the lower end of the second refrigeration box 2 is penetrated with the upper end of the second refrigerant outlet pipe 13, the first refrigerant inlet pipe 10 and the second refrigerant inlet pipe 12 are connected with the output end of the external refrigerant circulating device, the first refrigerant outlet pipe 11 and the second refrigerant outlet pipe 13 are connected with the input end of the refrigerant circulating device, and the outer end of the circulating pipe 5 is connected with the external natural gas circulating device, then, the refrigerant enters the inside of the first refrigeration box 1 through the first refrigerant inlet pipe 10, enters the inside of the second refrigeration box 2 through the second refrigerant inlet pipe 12, when the refrigeration effect of the natural gas cooling member 4 is reduced by the heat in the first refrigeration box 1, the motor 14 drives the threaded rod 3 to rotate in the inside of the first refrigeration box 1 and the second refrigeration box 2, the threaded rod 3 rotates at the lower end of the natural gas cooling member 4, the natural gas cooling member 4 slides into the inside of the second refrigeration box 2 through the sliding port 6, the refrigerant in the inside of the first refrigeration box 1 is discharged through the first refrigerant outlet pipe 11, and the refrigerant is introduced into the inside of the first refrigeration box 1 again through the first refrigerant inlet pipe 10.

[0027] In Figure 2 , 4 In the middle: the natural gas cooling member 4 comprises a coil pipe body 15, the inner side of the coil pipe body 15 is provided with heat exchange fins 16, the lower side of the coil pipe body 15 is provided with a sliding block 17, the outer end of the coil pipe body 15 is penetrated with one end of the circulating pipe 5, the threaded rod 3 rotates in the internal position of the sliding block 17, the refrigerant in the first refrigeration box 1 cools the coil pipe body 15, the heat exchange fins 16 improve the refrigeration effect of the coil pipe body 15, and the natural gas after refrigeration is circulated through the circulating pipe 5.

[0028] The working principle of the utility model is: first, the first refrigerant inlet pipe 10 and the second refrigerant inlet pipe 12 are connected with the output end of the external refrigerant circulating device, the first refrigerant outlet pipe 11 and the second refrigerant outlet pipe 13 are connected with the input end of the refrigerant circulating device, and the outer end of the circulating pipe 5 is connected with the external natural gas circulating device;

[0029] Then, the refrigerant enters the interior of the first refrigeration box 1 through the first refrigerant inlet pipe 10, enters the interior of the second refrigeration box 2 through the second refrigerant inlet pipe 12, the refrigerant in the interior of the first refrigeration box 1 refrigerates the coil main body 15, the heat exchange sheet 16 improves the refrigeration effect of the coil main body 15, the refrigerated natural gas circulates through the circulation pipe 5, when the refrigeration effect of the natural gas cooling component 4 by the heat in the interior of the first refrigeration box 1 is reduced, the motor 14 drives the threaded rod 3 to rotate in the interior of the first refrigeration box 1 and the second refrigeration box 2, the threaded rod 3 rotates in the interior of the sliding block 17, the coil main body 15 slides into the interior of the second refrigeration box 2 through the sliding opening 6, the first refrigerant outlet pipe 11 discharges the refrigerant in the interior of the first refrigeration box 1, the refrigerant is introduced into the interior of the first refrigeration box 1 through the first refrigerant inlet pipe 10 again, the refrigerant in the interior of the second refrigeration box 2 refrigerates the coil main body 15, the heat exchange sheet 16 improves the refrigeration effect of the coil main body 15, the refrigerated natural gas circulates through the circulation pipe 5, when the refrigeration effect of the natural gas cooling component 4 by the heat in the interior of the second refrigeration box 2 is reduced, the natural gas cooling component 4 moves into the interior of the first refrigeration box 1 to refrigerate again.

[0030] The above merely describes a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art, according to the technical scheme and the inventive concept of the present application, can make equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A hybrid refrigeration plant for liquefying natural gas, characterized in that, The utility model provides a natural gas cooling device, including first refrigeration box (1), second refrigeration box (2), threaded rod (3), natural gas cooling component (4), circulating pipe (5) and slide mouth (6), second refrigeration box (2) is located first refrigeration box (1) one side position, threaded rod (3) is located first refrigeration box (1) with second refrigeration box (2) inside position, natural gas cooling component (4) is located threaded rod (3) outside position, circulating pipe (5) is located natural gas cooling component (4) one side position, slide mouth (6) is located first refrigeration box (1) with second refrigeration box (2) adjacent side position, The lower end of the first refrigeration box (1) and the second refrigeration box (2) is provided with an aeration disc (7), and the upper side of the aeration disc (7) is provided with an aeration pipe (8), one end of the aeration pipe (8) is provided with a gas pump (9).

2. The hybrid refrigeration plant for liquefying natural gas according to claim 1, characterized in that, The upper side of the first refrigeration box (1) is provided with a first refrigerant inlet pipe (10), the lower side of the first refrigeration box (1) is provided with a first refrigerant outlet pipe (11), the upper side of the second refrigeration box (2) is provided with a second refrigerant inlet pipe (12), the lower side of the second refrigeration box (2) is provided with a second refrigerant outlet pipe (13), and the side of the second refrigeration box (2) corresponds to the position of the threaded rod (3) and is provided with a motor (14).

3. The hybrid refrigeration unit for natural gas liquefaction of claim 1, wherein, The natural gas cooling component (4) includes a coil body (15), the inner side of the coil body (15) is provided with a heat exchange fin (16), and the lower side of the coil body (15) is provided with a sliding block (17).

4. The hybrid refrigeration unit for natural gas liquefaction of claim 1, wherein, The outer end of the natural gas cooling component (4) penetrates one end of the circulating pipe (5), and the other end of the circulating pipe (5) slides at a side position of the second refrigeration box (2).

5. The hybrid refrigeration unit for natural gas liquefaction of claim 1, wherein, The threaded rod (3) rotates in the internal position of the first refrigeration box (1) and the second refrigeration box (2), the natural gas cooling component (4) slides in the internal position of the slide mouth (6), the output end of the gas pump (9) penetrates the input end of the aeration pipe (8), and the output end of the aeration pipe (8) penetrates the input end of the aeration disc (7).

6. The hybrid refrigeration plant for liquefying natural gas according to claim 2, wherein, The threaded rod (3) rotates in the internal position of the first refrigeration box (1) and the second refrigeration box (2) through the motor (14), the lower end of the first refrigerant inlet pipe (10) penetrates the upper end of the first refrigeration box (1), the lower end of the first refrigeration box (1) penetrates the upper end of the first refrigerant outlet pipe (11), the lower end of the second refrigerant inlet pipe (12) penetrates the upper end of the second refrigeration box (2), and the lower end of the second refrigeration box (2) penetrates the upper end of the second refrigerant outlet pipe (13).

7. The hybrid refrigeration plant for liquefying natural gas according to claim 3, wherein, The outer end of the coil body (15) penetrates one end of the circulating pipe (5), and the threaded rod (3) rotates in the internal position of the sliding block (17).

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