A direct-fired cryogenic liquid vaporizer

Abstract

This utility model discloses a direct-fired cryogenic liquid vaporizer, relating to the field of vaporizer technology. It includes: a housing with a heat exchange chamber inside; several burners arranged on one side of the heat exchange chamber, with the nozzles of the burners extending into the heat exchange chamber; and a heat exchange tube inside the housing, with a liquid inlet and a gas outlet at each end, extending to the outside of the housing. In use, the multiple burners allow for the selection of different numbers of burners to provide varying amounts of heat, saving energy while ensuring effective heat exchange. When used, the combustion flue gas is directly injected into the cryogenic heat exchange tube, offering advantages such as small size, high thermal efficiency, and high automation, and can be used for liquid nitrogen vaporization in fracturing trucks used in oil fields and shale gas extraction.

Description

Technical Field

[0001] This utility model relates to the field of vaporizer technology, specifically a direct-fired cryogenic liquid vaporizer. Background Technology

[0002] A vaporizer is a device used to heat liquid gas and turn it into gas. Simply put, cold liquid gas turns into gas after passing through a vaporizer. The heating can be indirect (steam-heated vaporizer, hot water bath vaporizer, natural ventilation air bath vaporizer, forced ventilation vaporizer, electric heating vaporizer, solid heat conduction vaporizer, or heat transfer fluid) or direct (hot gas or submerged combustion).

[0003] A direct-fired vaporizer is a device that obtains the heat required for vaporization by directly burning the medium. It is mainly used for the forced vaporization of non-flammable and non-explosive low-temperature media such as LN2. Existing direct-fired vaporizers typically use a single burner to provide heat, and their heating capacity is fixed and cannot be adjusted according to actual usage to meet different application scenarios.

[0004] In view of this, there is an urgent need for a direct-fired cryogenic liquid vaporizer. Summary of the Invention

[0005] To address the problems existing in the prior art, this utility model solves the problem using the following technical structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A direct-fired cryogenic liquid vaporizer includes: a housing, wherein a heat exchange chamber is provided inside the housing, and a plurality of burners are provided on one side of the heat exchange chamber, the nozzles of the plurality of burners extending into the heat exchange chamber; a heat exchange tube is provided inside the housing, wherein the two ends of the heat exchange tube are a liquid inlet and a gas outlet, respectively, and the liquid inlet and the gas outlet extend to the outside of the housing.

[0008] A fan is installed on the housing, and the air outlet direction of the fan is consistent with the direction of the flame nozzles of the burners.

[0009] The air outlet of the fan is directed toward the heat exchange tube.

[0010] Several of the burners are arranged in parallel.

[0011] Several of the burners are evenly distributed around the circumference.

[0012] Several of the burners are evenly arranged along the periphery of the fan.

[0013] The heat exchange tube includes a spiral section disposed between the liquid inlet end and the gas outlet end, the spiral section extending spirally from the liquid inlet end to the gas outlet end, and the air outlet direction of the fan is towards the spiral section.

[0014] The liquid inlet and the gas outlet face opposite directions.

[0015] The burner is provided in eight parts.

[0016] An explosion-proof control box is installed on the enclosure.

[0017] The above-described structure of this utility model can achieve the following beneficial effects:

[0018] In use, cryogenic liquids such as liquid nitrogen are introduced into the heat exchange tube from the inlet end, and then burned into the heat exchange chamber by the burner, providing a large amount of hot gas to provide heat for the cryogenic liquid in the heat exchange tube. The vaporized gas is discharged from the outlet end. Since several burners are set, different numbers of burners can be selected to perform work according to the usage requirements, so as to provide different amounts of heat, saving energy while ensuring the heat exchange effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0020] Figure 2 This is a structural schematic diagram from another perspective of this embodiment.

[0021] In the diagram: 1. Housing; 2. Heat exchange chamber; 3. Burner; 4. Heat exchange tube; 41. Liquid inlet; 42. Gas outlet; 43. Spiral section; 5. Fan; 6. Explosion-proof control box. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0023] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products or devices.

[0024] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0025] refer to Figure 1 and Figure 2 The direct-fired cryogenic liquid vaporizer shown includes: a housing 1, a heat exchange chamber 2 inside the housing 1, a plurality of burners 3 on one side of the housing 1 and the nozzles of the plurality of burners 3 extending into the heat exchange chamber 2; a heat exchange tube 4 inside the housing 1, the two ends of the heat exchange tube 4 being a liquid inlet 41 and a gas outlet 42, respectively, and the liquid inlet 41 and the gas outlet 42 extending to the outside of the housing 1.

[0026] Based on the above structure, during use, cryogenic liquids such as liquid nitrogen are introduced into the heat exchange tube 4 from the liquid inlet end 41, and are burned and sprayed into the heat exchange chamber 2 through the burner 3, providing a large amount of hot gas to provide heat for the cryogenic liquid in the heat exchange tube 4. The vaporized gas is discharged from the gas outlet end 42. Since several burners 3 are set, different numbers of burners 3 can be selected to do work according to the usage requirements to provide different amounts of heat, saving energy while ensuring the heat exchange effect.

[0027] like Figure 1 and Figure 2 As shown, in order to guide the high-temperature flue gas generated by the burner 3, a fan 5 is installed on the housing 1. The air outlet direction of the fan 5 is consistent with the direction of the flame nozzles of several burners 3; and the air outlet direction of the fan 5 is towards the heat exchange tube 4. In this way, the heat generated by the burner 3 reaches the heat exchange tube 4 to the maximum extent, ensuring the heat exchange effect.

[0028] like Figure 1 and Figure 2 As shown, several burners 3 are arranged in parallel (eight burners 3 are provided in this embodiment); and several burners 3 are evenly arranged in a circle along the periphery of the fan 5, so that the flue gas generated by several burners 3 can be blown by the fan 5 to the heat exchange tube 4.

[0029] like Figure 1 As shown, in order to extend the heat exchange time, the heat exchange tube 4 includes a spiral section 43 disposed between the liquid inlet end 41 and the gas outlet end 42. The spiral section 43 extends spirally from the liquid inlet end 41 to the gas outlet end 42, and the air outlet direction of the fan 5 is towards the spiral section 43. In this way, the spiral design extends the path and time of the low-temperature liquid flowing in the heat exchange tube 4, thereby improving the heat exchange effect. Furthermore, the liquid inlet end 41 and the gas outlet end 42 are oriented in opposite directions, which facilitates the connection of pipelines between the liquid inlet end 41 and the gas outlet end 42, and provides more installation space in the direction of the liquid inlet end 41 and the gas outlet end 42.

[0030] like Figure 1 and Figure 2As shown, an explosion-proof control box 6 (one of the prior art) is provided on the enclosure 1. Since the air pressure inside the enclosure 1 is relatively high when this application is used, the explosion-proof control box 6 is provided to ensure the safety inside the enclosure 1.

[0031] In summary, during use, cryogenic liquids such as liquid nitrogen are introduced into the heat exchange tube 4 from the inlet end 41, and are then burned and sprayed into the heat exchange chamber 2 through the burner 3, providing a large amount of hot gas to provide heat for the cryogenic liquid in the heat exchange tube 4. The vaporized gas is discharged from the outlet end 42. Since several burners 3 are provided, different numbers of burners 3 can be selected to perform work according to the usage requirements, so as to provide different amounts of heat, saving energy while ensuring the heat exchange effect.

[0032] When used in this application, the combustion flue gas is directly injected into the low-temperature heat exchange tube, which has the advantages of small size, high thermal efficiency and high degree of automation, and can be used for liquid nitrogen vaporization in fracturing trucks in oil fields and shale gas extraction.

[0033] The above are merely preferred embodiments of this application, and the present invention is not limited to the above embodiments. It is understood that other improvements and variations that can be directly derived or conceived by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included within the protection scope of the present invention.

Claims

1. A direct-fired cryogenic liquid vaporizer, characterized in that, include: The box (1) is provided with a heat exchange chamber (2). Several burners (3) are provided on one side of the heat exchange chamber (2) of the box (1). The nozzles of the burners (3) extend into the heat exchange chamber (2). A heat exchange tube (4) is provided in the box (1). The two ends of the heat exchange tube (4) are liquid inlet (41) and gas outlet (42) respectively. The liquid inlet (41) and gas outlet (42) extend to the outside of the box (1) respectively.

2. The direct-fired cryogenic liquid gasifier of claim 1, wherein: A fan (5) is provided on the housing (1), and the air outlet direction of the fan (5) is consistent with the flame nozzle direction of the burners (3).

3. The direct-fired cryogenic liquid gasifier of claim 2, wherein: The air outlet direction of the fan (5) is toward the heat exchange tube (4).

4. A direct-fired cryogenic liquid gasifier as set forth in claim 3 wherein: Several of the burners (3) are arranged in parallel.

5. The direct-fired cryogenic liquid vaporizer according to claim 4, characterized in that: Several of the burners (3) are evenly distributed around the circumference.

6. The direct-fired cryogenic liquid vaporizer according to claim 5, characterized in that: Several of the burners (3) are evenly arranged around the fan (5).

7. The direct-fired cryogenic liquid vaporizer according to claim 3, characterized in that: The heat exchange tube (4) includes a spiral section (43) disposed between the liquid inlet end (41) and the gas outlet end (42). The spiral section (43) extends spirally from the liquid inlet end (41) to the gas outlet end (42), and the air outlet direction of the fan (5) is towards the spiral section (43).

8. The direct-fired cryogenic liquid vaporizer according to claim 1, characterized in that: The liquid inlet (41) and the gas outlet (42) face opposite directions.

9. The direct-fired cryogenic liquid vaporizer according to claim 1, characterized in that: The burner (3) is provided in eight parts.

10. A direct-fired cryogenic liquid vaporizer according to claim 1, characterized in that: An explosion-proof control box (6) is installed on the enclosure (1).

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