External circulating heating system of sodium hydroxide cabinet

Abstract

The technical scheme of the utility model discloses an external circulating heating system of a sodium hydroxide cabinet, which is characterized by comprising the sodium hydroxide cabinet, a sodium hydroxide solution in the sodium hydroxide cabinet is sucked into the sodium hydroxide heater through the sodium hydroxide heating pump, and the sodium hydroxide solution is heated through the sodium hydroxide heater and conveyed back to the sodium hydroxide cabinet again. The sodium hydroxide solution in the sodium hydroxide cabinet is kept at the preset temperature. The circulating heating system is arranged outside the sodium hydroxide cabinet, so that the temperature of the sodium hydroxide solution meets the operation requirement of the system, and sailors can conveniently and timely find whether equipment is seriously corroded or not and replace the equipment. Meanwhile, if the ship is provided with a steam boiler or a hot oil boiler, steam or hot oil media can be used for heating the sodium hydroxide cabinet, so that the functions of electric heating and other heating modes are achieved at the same time, and it is guaranteed that the system operates more reliably.

Description

Technical Field

[0001] The utility model relates to the technical field of sodium hydroxide cabinets, in particular to an external circulating heating system for a sodium hydroxide cabinet. Background Art

[0002] At present, ships equipped with exhaust gas recirculation (EGR) technology are generally equipped with sodium hydroxide tanks. In order to neutralize the acidity accumulated in the EGR treatment water and prevent the sodium hydroxide from crystallizing, it is necessary to ensure that the sodium hydroxide solution in the sodium hydroxide tank maintains a certain temperature. Therefore, the sodium hydroxide tank needs to be equipped with heating equipment.

[0003] In view of the above situation, the design of the existing sodium hydroxide cabinet is generally to add an electric heater in the cabinet (such as Figure 1 This method is simple, convenient, and easy to operate, but sodium hydroxide is highly corrosive and will corrode the electric heater inside the cabinet over time. If the electric heater is damaged by corrosion, it will be difficult to replace it in time, affecting the normal operation of the system. The crew will not be able to replace the damaged electric heater in time, and even the overall operation of the system may be affected. Utility Model Content

[0004] The technical problem solved by the utility model is that after adding an electric heater to a traditional sodium hydroxide cabinet, if the electric heater is damaged due to corrosion, it is difficult to replace it in time, thereby affecting the normal operation of the system and the crew cannot replace the damaged electric heater in time, and even affecting the overall operation of the system.

[0005] In order to solve the above technical problems, the technical solution of the present utility model provides an external circulating heating system for a sodium hydroxide cabinet, which is used to maintain the sodium hydroxide solution in the sodium hydroxide cabinet at a preset temperature, including:

[0006] Sodium hydroxide cabinet;

[0007] a pipette, vertically connected to the inner top of the sodium hydroxide cabinet;

[0008] a sodium hydroxide heating pump, arranged outside the sodium hydroxide cabinet and connected to the liquid pipe;

[0009] A sodium hydroxide heater is arranged outside the sodium hydroxide cabinet and connected to the sodium hydroxide heating pump through its liquid inlet;

[0010] a liquid outlet pipe, with two ends respectively connected to the liquid outlet of the sodium hydroxide heater and the interior of the sodium hydroxide cabinet;

[0011] The sodium hydroxide solution in the sodium hydroxide cabinet is sucked out into the sodium hydroxide heater by the sodium hydroxide heating pump, and the sodium hydroxide solution is heated by the sodium hydroxide heater and transported back to the sodium hydroxide cabinet to maintain the sodium hydroxide solution in the sodium hydroxide cabinet at a preset temperature.

[0012] Optionally, a first stop valve is installed between the sodium hydroxide cabinet and the sodium hydroxide heating pump.

[0013] Optionally, a liquid inlet pipe is connected between the sodium hydroxide heating pump and the sodium hydroxide heater, and a first stop check valve is installed on the liquid inlet pipe.

[0014] Optionally, a second stop valve is installed between the sodium hydroxide cabinet and the liquid outlet pipe, and the second stop valve is installed on the sodium hydroxide cabinet.

[0015] Optionally, a second stop check valve is installed on the liquid outlet pipe between the sodium hydroxide heater and the sodium hydroxide cabinet, and the second stop check valve is close to the liquid outlet of the sodium hydroxide heater.

[0016] Optionally, first pressure sensors are installed at the left and right ends of the sodium hydroxide heating pump respectively.

[0017] Optionally, a second pressure sensor and a first temperature sensor are installed at both the liquid inlet and the liquid outlet of the sodium hydroxide heater.

[0018] Optionally, a second temperature sensor is installed in the sodium hydroxide cabinet.

[0019] Optionally, the liquid pipe includes a horizontal pipe connected to the outside of the sodium hydroxide cabinet by the sodium hydroxide heating pump, and a vertical pipe vertically connected to the top of the sodium hydroxide cabinet, a right-angle stop check valve is installed on the top of the sodium hydroxide cabinet, and the vertical pipe is connected to the suction port in the sodium hydroxide cabinet.

[0020] Optionally, the horizontal pipe is connected between the suction port and the sodium hydroxide heating pump, and the vertical pipe is located between the suction port inside the sodium hydroxide cabinet and the right-angle stop check valve.

[0021] The beneficial effects of the technical solution of this utility model are:

[0022] The utility model, by installing an external circulating heating system in the sodium hydroxide tank, not only ensures that the temperature of the sodium hydroxide solution meets the operating requirements of the system, but also facilitates the crew to promptly detect whether the equipment is seriously corroded and replace it. At the same time, if the ship itself is equipped with a steam boiler or a hot oil boiler, the steam or hot oil medium can also be used to heat the sodium hydroxide tank, thereby achieving the functions of both electric heating and other heating methods, ensuring more reliable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of a traditional sodium hydroxide cabinet heating system;

[0024] Figure 2 This is a schematic structural diagram of the external circulating heating system of the sodium hydroxide cabinet in the embodiment of the present utility model;

[0025] Figure 3 Schematic diagram of another system structure for heating sodium hydroxide solution.

[0026] In the accompanying drawings: 1. Sodium hydroxide cabinet, 2. Liquid suction pipe, 3. Sodium hydroxide heating pump, 4. Sodium hydroxide heater, 5. Liquid outlet pipe, 6. First stop valve, 7. First stop check valve, 8. Second stop valve, 9. Second stop check valve, 10. First pressure sensor, 11. Second pressure sensor, 12. First temperature sensor, 13. Second temperature sensor, 14. Medium pipeline, 15. Pipeline, 16. Liquid inlet pipe, 21. Horizontal pipe, 22. Vertical pipe, 23. Right-angle stop check valve, 24. Suction port, 41. Liquid inlet, 42. Liquid outlet. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0030] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0032] See Figure 1 and Figure 2 The figure shows an embodiment of an external circulation heating system for a sodium hydroxide cabinet, which is used to maintain the sodium hydroxide solution in the sodium hydroxide cabinet 1 at a preset temperature, wherein the system includes a sodium hydroxide cabinet 1; a liquid pipe 2, which is vertically connected to the inner top of the sodium hydroxide cabinet 1; a sodium hydroxide heating pump 3, which is arranged outside the sodium hydroxide cabinet 1 and connected to the liquid pipe 2; a sodium hydroxide heater 4, which is arranged outside the sodium hydroxide cabinet 1 and connected to the sodium hydroxide heating pump 3 through its liquid inlet 41; a liquid outlet pipe 5, whose two ends are respectively connected to the liquid outlet 42 of the sodium hydroxide heater 4 and the interior of the sodium hydroxide cabinet 1; the sodium hydroxide solution in the sodium hydroxide cabinet 1 is sucked out into the sodium hydroxide heater 4 by the sodium hydroxide heating pump 3, heated by the sodium hydroxide heater 4 and re-transported back to the sodium hydroxide cabinet 1, so as to maintain the sodium hydroxide solution in the sodium hydroxide cabinet 1 at the preset temperature.

[0033] In this embodiment, a first stop valve 6 is installed between the sodium hydroxide cabinet 1 and the sodium hydroxide heating pump 3 .

[0034] In this embodiment, a liquid inlet pipe 16 is connected between the sodium hydroxide heating pump 3 and the sodium hydroxide heater 4 , and a first stop check valve 7 is installed on the liquid inlet pipe 16 .

[0035] In this embodiment, a second stop valve 8 is installed between the sodium hydroxide tank 1 and the liquid outlet pipe 5 , and the second stop valve 8 is installed on the sodium hydroxide tank 1 .

[0036] In this embodiment, a second stop check valve 9 is installed on the liquid outlet pipe 5 between the sodium hydroxide heater 4 and the sodium hydroxide cabinet 1 . The second stop check valve 9 is close to the liquid outlet 42 of the sodium hydroxide heater 4 .

[0037] In this embodiment, first pressure sensors 10 are respectively installed at the left and right ends of the sodium hydroxide heating pump 3, and may be vacuum pressure gauges.

[0038] In this embodiment, a second pressure sensor 11 (which may be a pressure gauge) and a first temperature sensor 12 (which may be a thermometer) are installed at both the liquid inlet 41 and the liquid outlet 42 of the sodium hydroxide heater 4 .

[0039] In this embodiment, a second temperature sensor 13 is installed in the sodium hydroxide cabinet 1 .

[0040] In the present embodiment, the liquid pipe 2 includes a sodium hydroxide heat pump 3 connected to a horizontal pipe 21 outside the sodium hydroxide cabinet 1, and a vertical pipe 22 vertically connected to the top of the sodium hydroxide cabinet 1. A right-angle stop check valve 23 is installed on the top of the sodium hydroxide cabinet 1, and the vertical pipe 22 connects the suction port 24 in the sodium hydroxide cabinet 1.

[0041] In this embodiment, the horizontal pipe 21 is connected between the right-angle stop check valve 23 and the sodium hydroxide heating pump 3, and the vertical pipe 22 is located between the internal suction port 24 of the sodium hydroxide cabinet 1 and the right-angle stop check valve 23.

[0042] The following description will further explain the characteristics and functions of the present invention.

[0043] The external circulation heating system of the sodium hydroxide cabinet of this embodiment is used to solve the shortcomings of the existing technology: the shortcomings include: 1. The electric heater is inside the cabinet, and the crew cannot judge the corrosion condition of the electric heater in time; 2. If the electric heater is damaged due to corrosion, it is difficult to replace it, which affects the overall operation of the system; with respect to shortcomings 1 and 2, the purpose of the improvement of this embodiment is to eliminate the above shortcomings 1 and 2 through the external circulation heating system of the sodium hydroxide cabinet, so that the system operation failure will not be caused by the electric heater not being replaced in time due to damage.

[0044] The structure of this embodiment was developed primarily based on the detailed design of a 1300TEU container ship. By utilizing an external circulating heating system for the sodium hydroxide tank, this design not only ensures that the sodium hydroxide solution temperature meets the EGR system's operational requirements, but also allows the crew to promptly detect and easily replace any severe corrosion in the electric heater. Furthermore, if the ship is equipped with a steam boiler or hot oil boiler, steam or hot oil can also be used to heat the sodium hydroxide tank, thereby achieving the combined functionality of electric heating and other heating methods, ensuring more reliable system operation.

[0045] The external circulating heating system for the sodium hydroxide cabinet of this embodiment, in addition to retaining some conventional designs of the existing sodium hydroxide cabinet, has a separate circulating heating system installed outside the sodium hydroxide cabinet, thereby ensuring that the sodium hydroxide cabinet has a normal temperature to meet the normal operation of the system and allowing the crew to easily detect corrosion of equipment such as the external electric heater, thereby facilitating the crew to replace the corroded electric heater in a timely manner, and preventing the system from being affected by the inability to replace the damaged electric heater.

[0046] The sodium hydroxide solution in the sodium hydroxide cabinet is sucked out from the suction port by the sodium hydroxide heating pump, and is heated to a certain temperature by the sodium hydroxide heater and then transported to the cabinet body of the sodium hydroxide cabinet, so that the sodium hydroxide solution in the sodium hydroxide cabinet maintains the temperature required by the EGR system. Since the sodium hydroxide heater is placed outside the sodium hydroxide cabinet, even if the heater is corroded by the sodium hydroxide solution after a period of work, the crew can easily observe the corrosion condition of the heater, which is convenient for timely response and easy replacement of severely corroded or even damaged electric heaters, ensuring the normal operation of the EGR system at all times.

[0047] like Figure 3 As shown, if the ship itself is equipped with a steam boiler or a hot oil boiler, steam or hot oil medium can also be used to connect the medium pipe 14 (specifically, a steam heating pipe or a hot oil heating pipe) in the sodium hydroxide tank in the pipe 15 (specifically, a condensate outlet pipe or a hot oil outlet pipe) to heat the sodium hydroxide solution in the sodium hydroxide tank, thereby achieving the functions of both electric heating and other heating methods, ensuring more reliable operation of the system.

[0048] In summary, this embodiment, by designing an external circulating heating system only in the sodium hydroxide tank, can circulate and heat the sodium hydroxide solution in the sodium hydroxide tank to maintain the required temperature. This modification is simple and, combined with the design of the existing sodium hydroxide tank, can better detect the operating status, corrosion, or even damage of the electric heater, making it easier for the crew to detect and replace it in a timely manner, thereby ensuring the long-term and reliable operation of the ship's EGR system. At the same time, if the ship itself is equipped with a steam boiler or a hot oil boiler, steam or hot oil can also be used as a medium to heat the sodium hydroxide tank, thereby achieving the functions of both electric heating and other heating methods, ensuring more reliable operation of the system.

[0049] The above are only preferred embodiments of the present invention and do not limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A sodium hydroxide cabinet external circulation heating system for maintaining the sodium hydroxide solution in the sodium hydroxide cabinet at a preset temperature, characterized in that: include: Sodium hydroxide cabinet; a pipette, vertically connected to the inner top of the sodium hydroxide cabinet; a sodium hydroxide heating pump, arranged outside the sodium hydroxide cabinet and connected to the liquid pipe; A sodium hydroxide heater is arranged outside the sodium hydroxide cabinet and connected to the sodium hydroxide heating pump through its liquid inlet; a liquid outlet pipe, with two ends respectively connected to the liquid outlet of the sodium hydroxide heater and the interior of the sodium hydroxide cabinet; The sodium hydroxide solution in the sodium hydroxide cabinet is sucked out into the sodium hydroxide heater by the sodium hydroxide heating pump, and the sodium hydroxide solution is heated by the sodium hydroxide heater and transported back to the sodium hydroxide cabinet to maintain the sodium hydroxide solution in the sodium hydroxide cabinet at a preset temperature.

2. The sodium hydroxide cabinet external circulation heating system according to claim 1, wherein A first stop valve is installed between the sodium hydroxide cabinet and the sodium hydroxide heating pump.

3. The sodium hydroxide cabinet external circulation heating system according to claim 2, wherein A liquid inlet pipe is connected between the sodium hydroxide heating pump and the sodium hydroxide heater, and a first stop check valve is installed on the liquid inlet pipe.

4. The sodium hydroxide cabinet external circulation heating system according to claim 3, wherein A second stop valve is installed between the sodium hydroxide cabinet and the liquid outlet pipe, and the second stop valve is installed on the sodium hydroxide cabinet.

5. The sodium hydroxide cabinet external circulation heating system according to claim 4, is characterized in that, A second stop check valve is installed on the liquid outlet pipe between the sodium hydroxide heater and the sodium hydroxide cabinet, and the second stop check valve is close to the liquid outlet of the sodium hydroxide heater.

6. The sodium hydroxide cabinet external circulation heating system according to claim 5, wherein The left and right ends of the sodium hydroxide heating pump are respectively equipped with first pressure sensors.

7. The sodium hydroxide cabinet external circulation heating system according to claim 6, wherein A second pressure sensor and a first temperature sensor are installed at the liquid inlet and the liquid outlet of the sodium hydroxide heater.

8. The sodium hydroxide cabinet external circulation heating system according to claim 7, wherein A second temperature sensor is installed in the sodium hydroxide cabinet.

9. The sodium hydroxide cabinet external circulation heating system according to claim 8, characterized in that, The liquid suction pipe includes a horizontal pipe connected to the outside of the sodium hydroxide cabinet by the sodium hydroxide heating pump, and a vertical pipe vertically connected to the top of the sodium hydroxide cabinet. A right-angle stop check valve is installed on the top of the sodium hydroxide cabinet, and the vertical pipe is connected to the suction port in the sodium hydroxide cabinet.

10. The sodium hydroxide cabinet external circulation heating system according to claim 9, characterized in that: The horizontal pipe is connected between the suction port and the sodium hydroxide heating pump, and the vertical pipe is located between the suction port inside the sodium hydroxide cabinet and the right-angle stop check valve.

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