Reboiling device for ship tail gas carbon dioxide trapping system

Abstract

The utility model discloses a reboiling device for a ship tail gas carbon dioxide trapping system, and belongs to the technical field of ship tail gas treatment. A reboiling device for a ship tail gas carbon dioxide capture system comprises a main box body, a control part is arranged on the main box body, two groups of mutually communicated cavities are arranged in the main box body, the reboiling device further comprises at least one group of heat pipe bundles fixedly installed on the main box body, the circuitous end of each heat pipe bundle extends to one cavity, and the other end of each heat pipe bundle extends to the other cavity. A heat pipe bundle sealing head is fixedly mounted at a pipe opening of the heat pipe bundle; by means of free combination and use of the multiple stages of heat pipe bundles, each stage of independent pipe bundle can be connected with other heat pipe bundles in parallel or in series, the same or different heating media are used and are not limited to steam, smoke, hot oil, hot water and the like, various low-temperature waste heat sources on a ship can be used for waste heat recycling, and the overall heat efficiency of the whole ship is improved.

Description

Technical Field

[0001] This utility model relates to the field of ship exhaust gas treatment technology, and in particular to a reboiling device for a ship exhaust carbon dioxide capture system. Background Technology

[0002] In the context of dual carbon emissions, ship exhaust decarbonization technology is a key research area in the maritime transport industry today, aiming to reduce carbon dioxide emissions during ship operation. With increasing global emphasis on environmental protection and sustainable development, organizations such as the International Maritime Organization are imposing increasingly stringent restrictions on ship emissions. Against this backdrop, the development of efficient exhaust decarbonization technology has become particularly important.

[0003] In exhaust gas decarbonization technology, aqueous solutions of organic amines are commonly used as carbon dioxide absorbents. Organic amines are the main active ingredients, which are very sensitive to temperature. They begin to decompose and become ineffective when the temperature is higher than their boiling point. The higher the temperature, the faster the decomposition, and this process is irreversible.

[0004] Currently, reboilers are key equipment in decarbonization systems. They increase the carbon dioxide desorption rate by heating the absorbent to boil. However, the heat source temperature used in traditional reboilers is much higher than the boiling point of the absorbent, which causes significant failure of the absorbent during the reboiling process, reduces the absorbent's service life, and increases operating costs and maintenance frequency.

[0005] The use of high-temperature heat sources on ships is directly linked to carbon emissions. Under the condition of limiting carbon emissions, a single heat source may not be enough to provide enough heat for a traditional reboiler after being distributed in multiple ways. At the same time, there is a lot of low-temperature waste heat on ships that has not been utilized.

[0006] In view of this, we propose a reboiling device for a ship exhaust carbon dioxide capture system. Utility Model Content

[0007] The purpose of this invention is to solve the problems in the existing technology, where traditional reboilers can only use a single heat source, the temperature adjustment is inflexible, resulting in low thermal efficiency, and the absorbent decomposes at high temperatures, thus increasing operating costs and maintenance frequency. Therefore, this invention proposes a reboiler device for a ship exhaust carbon dioxide capture system.

[0008] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0009] A reboiling device for a ship exhaust carbon dioxide capture system includes a main housing with a control unit. The main housing has two interconnected chambers. The device also includes at least one set of heat pipe bundles fixedly installed on the main housing. The tortuous ends of the heat pipe bundles extend into one of the chambers. Heat pipe bundle end caps are fixedly installed at the pipe openings of the heat pipe bundles. The heat pipe bundle end caps are provided with connectors for connecting to an external heat source.

[0010] To ensure the efficient use of the device, preferably, the main housing includes a reboiler material inlet, a reboiler material outlet, a pressure relief port, a slag discharge port, and a steam outlet connected thereto. The main housing is internally fixedly connected to a partition, which divides the chamber into a heating chamber and a liquid collection chamber. The main housing is connected to a sensor interface.

[0011] To improve the thermal efficiency of the device, preferably, the heat pipe bundle includes a primary heat pipe bundle and a secondary heat pipe bundle, and the detour ends of the primary heat pipe bundle and the secondary heat pipe bundle extend into the heating cavity.

[0012] To further improve the stability of the heat pipe bundle, a heat pipe support is fixedly connected inside the main housing, and the heat pipe support is sleeved on the heat pipe bundle.

[0013] To facilitate inspection and maintenance of the main housing, preferably, the main housing has an inspection port connected to it, and an inspection cover is installed on the inspection port.

[0014] To facilitate connection to an external heat source, the connector preferably includes a heat source inlet and a heat source outlet, with the heat source inlet connected to one side of the heat pipe bundle end cap and the heat source outlet connected to the other side of the heat pipe bundle end cap.

[0015] To control the device and provide it with a heat source, preferably, the control unit includes a control system, heat source A, heat source B, and an external material pipeline installed on the main housing. Temperature sensors A, B, C, and D are fixedly installed on the external material pipeline. Pressure sensors A, B, and C are also fixedly installed on the external material pipeline. Regulating valves A and B are also fixedly installed on the external material pipeline. All temperature sensors A, B, C, and D, pressure sensors A, B, and C, as well as regulating valves A and B, are connected to the control system via cables.

[0016] Compared with the prior art, this utility model provides a reboiling device for a ship exhaust carbon dioxide capture system, which has the following beneficial effects:

[0017] 1. The reboiling device for the carbon dioxide capture system of ship exhaust gas can be used by freely combining primary and secondary heat pipe bundles. Each group of independent tube bundles can be connected in parallel or in series, and can use the same or different heating media, not limited to steam, flue gas, hot oil, hot water, etc. It can use various low-temperature waste heat sources on the ship for waste heat reuse, thereby improving the overall thermal efficiency of the ship.

[0018] 2. The reboiling device for the carbon dioxide capture system of ship exhaust gas can adjust the heating capacity of the primary and secondary heat pipe bundles through the setting of the control system, regulating valve A and regulating valve B, so as to achieve the heating balance point of the process design. This further reduces the heat loss of the absorbent without wasting heat source, reduces the absorbent replacement frequency, and reduces operating costs.

[0019] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model solves the problems in the prior art, where traditional reboilers can only use a single heat source, the temperature adjustment is inflexible, resulting in low thermal efficiency, and the absorbent decomposes at high temperatures, thus increasing operating costs and maintenance frequency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main casing of a reboiling device for a ship exhaust carbon dioxide capture system proposed in this utility model.

[0021] Figure 2 This is a cross-sectional structural diagram of the main casing of a reboiling device for a ship exhaust carbon dioxide capture system proposed in this utility model.

[0022] Figure 3 This is a front view structural diagram of the main casing of a reboiling device for a ship exhaust carbon dioxide capture system proposed in this utility model.

[0023] Figure 4 This invention presents a process flow diagram of a reboiling device for a ship exhaust carbon dioxide capture system.

[0024] In the diagram: 1. Main housing; 2. Primary heat pipe bundle; 21. Secondary heat pipe bundle; 3. Heat pipe bundle end cap; 101. Reboiler material inlet; 102. Reboiler material outlet; 103. Heat pipe support; 104. Baffle plate; 105. Sensor interface; 107. Inspection port; 108. Pressure relief port; 109. Slag discharge port; 110. Steam outlet; 301. Heat source inlet; 302. Heat source outlet; 4. External material pipeline; 401. Temperature sensor A; 402. Temperature sensor B; 403. Temperature sensor C; 404. Temperature sensor D; 501. Pressure sensor A; 502. Pressure sensor B; 503. Pressure sensor C; 601. Control valve A; 602. Control valve B. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Example:

[0028] Reference Figures 1-4 This utility model provides a reboiling device for a ship exhaust carbon dioxide capture system, including a main housing 1 with a horizontal or vertical structure. Taking the horizontal structure as an example, the main housing 1 is equipped with a control unit. The main housing 1 has two interconnected chambers, namely a heating chamber and a liquid collection chamber. It also includes at least one set of heat pipe bundles installed on the main housing 1, wherein the tortuous end of the heat pipe bundle extends into one of the chambers, and a heat pipe bundle end cap 3 is fixedly installed at the pipe opening of the heat pipe bundle. The heat pipe bundle end cap 3 is provided with a connector for connecting to an external heat source. The heat pipe bundle includes a primary heat pipe bundle 2 and a secondary heat pipe bundle 21, and can also be configured as a tertiary or multi-stage heat pipe bundle. Taking a reboiler with a secondary heat pipe bundle design as an example, the primary heat pipe bundle 2 and the secondary heat pipe bundle 21 are both located in the same chamber, that is, their detour ends extend into the heating chamber. The primary heat pipe bundle 2 and the secondary heat pipe bundle 21 are preferably U-shaped tube bundles with their inlet and outlet on the same side. The primary heat pipe bundle 2 and the secondary heat pipe bundle 21 are independent of each other so that different heat source media can be used. The main housing 1, the primary heat pipe bundle 2, the secondary heat pipe bundle 21, and the heat pipe bundle end caps 3 are all provided with insulation layers to reduce heat loss.

[0029] Specifically, in use, the primary heat pipe bundle 2 and the secondary heat pipe bundle 21 can be freely combined. Each independent bundle can be connected in parallel or in series, and can use the same or different heating media, not limited to steam, flue gas, hot oil, hot water, etc. Various low-temperature waste heat sources on board can be used for waste heat reuse, improving the overall thermal efficiency of the entire ship. Through the cooperation of the control unit and connecting parts, the heating capacity of the primary heat pipe bundle 2 and the secondary heat pipe bundle 21 can be adjusted to achieve the heating balance point of the process design. While not wasting heat sources, the heat loss of absorbent is further reduced, the absorbent replacement frequency is reduced, and the operating cost is reduced.

[0030] The main chamber 1 of the reboiler includes a reboiler material inlet 101, a reboiler material outlet 102, a pressure relief port 108, a slag discharge port 109, and a steam outlet 110 connected thereto. A partition 104 is fixedly connected inside the main chamber 1, and the partition 104 is located between two sets of chambers. A sensor interface 105 is connected to the main chamber 1, and an inspection port 107 is connected to the main chamber 1. An inspection cover is installed on the inspection port 107 for inspection and maintenance of the main chamber 1.

[0031] Specifically, the carbon dioxide-rich absorbent can be introduced into the main tank 1 through the reboiler material inlet 101, and the high-temperature absorbent after boiling can be discharged and enter the subsequent process cycle through the reboiler material outlet 102. The pressure relief port 108 is used for device pressure relief, the slag discharge port 109 is used to discharge impurities in the main tank 1, the steam outlet 110 is used to discharge steam, and the baffle 104 ensures that the reboiler material absorbent overflows from the top of the baffle 104 into the reboiler material outlet 102 after sufficient boiling, which can make the boiling desorption more complete. The sensor interface 105 is used to connect to the external material pipeline 4 and the sensing device.

[0032] A heat pipe bracket 103 is fixedly connected inside the main housing 1, and the heat pipe bracket 103 fixes the primary heat pipe bundle 2 and the secondary heat pipe bundle 21.

[0033] Specifically, the heat pipe support 103 can support the primary heat pipe bundle 2 and the secondary heat pipe bundle 21, thereby improving their stability.

[0034] The aforementioned connector includes a heat source inlet 301 and a heat source outlet 302. The heat source inlet 301 is connected to one side of the heat pipe bundle end cap 3, and the heat source outlet 302 is connected to the other side of the heat pipe bundle end cap 3.

[0035] Specifically, the setting of heat source inlet 301 and heat source outlet 302 facilitates the connection of external material pipeline 4, allowing heat source media of different temperatures to be introduced into the primary heat pipe bundle 2 and the secondary heat pipe bundle 21 respectively.

[0036] The aforementioned control unit includes a control system, heat source A, heat source B, and external material pipeline 4, all installed on the main housing 1. Temperature sensors A401, B402, C403, and D404 are fixedly installed on the external material pipeline 4. Pressure sensors A501, B502, and C503 are also fixedly installed on the external material pipeline 4. Regulating valves A601 and B602 are also fixedly installed on the external material pipeline 4. Temperature sensors A401, B402, C403, and D404, pressure sensors A501, B502, and C503, as well as regulating valves A601 and B602, are all connected to the control system via cables. An insulation layer is provided on the external material pipeline 4 to reduce heat loss.

[0037] Specifically, by setting up a control system, heat source A, heat source B, and external material pipeline 4, the device can be controlled and a heat source can be provided to it. By setting up temperature sensors A401, B402, C403, and D404, the temperature inside the pipeline during the operation of the device can be monitored. By setting up pressure sensors A501, B502, and C503, the pressure inside the pipeline during the operation of the device can be monitored. By setting up regulating valves A601 and B602, regulating valve A601 can control the circulation rate of the heating medium of heat source A, and regulating valve B602 can control the circulation rate of the heating medium of heat source B.

[0038] It should be noted that: the technical solution of this Figure 4 In the diagram, the solid line outside the frame represents the external material pipeline 4, the dashed line outside the frame represents the control cable, and the dashed line inside the frame represents the markings of the primary heat pipe bundle 2, the secondary heat pipe bundle 21, and the partition 104.

[0039] Working principle: During operation, the reboiler for the carbon dioxide capture system of ships introduces the carbon dioxide-rich absorbent from the carbon capture system into the reboiler through the reboiler material inlet 101. It is heated step by step by the primary heat pipe bundle 2 and the secondary heat pipe bundle 21. After boiling and desorption, the high-temperature absorbent after boiling passes through the baffle 104 into the liquid collection chamber in the main tank 1, and is discharged through the reboiler material outlet 102 into the subsequent process cycle.

[0040] In detailed use, the heating medium from heat source A circulates in the primary heat pipe bundle 2. Its temperature is lower than that of heat source B, but slightly higher than the boiling point of the absorbent. The circulation volume of the heating medium from heat source A is controlled by regulating valve A601 to ensure that the temperature at temperature sensor C403 is the same as the boiling point of the absorbent.

[0041] Meanwhile, a heating medium from heat source B circulates in the secondary heat pipe bundle 21. Its temperature is higher than that of heat source A. The circulation rate of the heating medium from heat source B is controlled by regulating valve B602 to ensure that the temperature at temperature sensor D404 is slightly higher than the boiling point temperature of the absorbent.

[0042] In detailed use, temperature sensors A401 and B402 detect the temperature of the absorbent after heating by the primary heat pipe bundle 2 and the secondary heat pipe bundle 21, respectively. If the temperature is lower than the boiling point of the absorbent, the control system appropriately increases the circulation rate of the heating medium and raises the control temperature of temperature sensors C403 and D404 according to the preset program. This setting allows the reboiling device to maintain a high-efficiency, low-energy-consumption, and low-loss working state under different absorbent flow rates.

[0043] In this reboiling unit, through the free combination of the primary heat pipe bundle 2 and the secondary heat pipe bundle 21, each independent pipe system can use different heating media. It can also reuse various low-temperature waste heat sources on board, thereby improving the overall thermal efficiency of the entire ship. Furthermore, the control system can adjust the heating capacity of the primary heat pipe bundle 2 and the secondary heat pipe bundle 21 through regulating valves A601 and B602 to achieve the heating balance point designed in the process. This further reduces the heat loss of the absorbent without wasting heat sources, lowers the absorbent replacement frequency, and reduces operating costs.

[0044] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A reboiling device for a ship exhaust carbon dioxide capture system, comprising a main housing (1), wherein a control unit is provided on the main housing (1), characterized in that, The main housing (1) has two interconnected chambers inside, and also includes at least one heat pipe bundle fixedly installed on the main housing (1). The heat pipe bundle has a detour end that extends into one of the chambers. A heat pipe bundle end cap (3) is fixedly installed at the pipe opening of the heat pipe bundle. The heat pipe bundle end cap (3) is provided with a connector for connecting to an external heat source.

2. A reboiling device for a ship exhaust carbon dioxide capture system according to claim 1, characterized in that, The main housing (1) includes a reboiler material inlet (101), a reboiler material outlet (102), a pressure relief port (108), a slag discharge port (109), and a steam outlet (110) connected thereto. The main housing (1) is fixedly connected to a partition (104), which divides the chamber into a heating chamber and a liquid collection chamber. The main housing (1) is connected to a sensor interface (105).

3. A reboiling device for a ship exhaust carbon dioxide capture system according to claim 2, characterized in that, The heat pipe bundle includes a primary heat pipe bundle (2) and a secondary heat pipe bundle (21), the detour ends of which extend into the heating cavity.

4. A reboiling device for a ship exhaust carbon dioxide capture system according to claim 3, characterized in that, A heat pipe bracket (103) is fixedly connected inside the main housing (1), and the heat pipe bracket (103) is sleeved on the heat pipe bundle.

5. A reboiling device for a ship exhaust carbon dioxide capture system according to claim 1, characterized in that, The main housing (1) is connected to an inspection port (107), and an inspection cover is installed on the inspection port (107).

6. A reboiling device for a ship exhaust carbon dioxide capture system according to claim 1, characterized in that, The connector includes a heat source inlet (301) and a heat source outlet (302), the heat source inlet (301) being connected to one side of the heat pipe bundle end cap (3), and the heat source outlet (302) being connected to the other side of the heat pipe bundle end cap (3).

7. A reboiling device for a ship exhaust carbon dioxide capture system according to claim 1, characterized in that, The control unit includes a control system, heat source A, heat source B and external material pipeline (4) installed on the main housing (1). Temperature sensor A (401), temperature sensor B (402), temperature sensor C (403) and temperature sensor D (404) are fixedly installed on the external material pipeline (4). Pressure sensor A (501), pressure sensor B (502) and pressure sensor C (503) are fixedly installed on the external material pipeline (4), and regulating valve A (601) and regulating valve B (602) are fixedly installed on the external material pipeline (4). Temperature sensor A (401), temperature sensor B (402), temperature sensor C (403), temperature sensor D (404), pressure sensor A (501), pressure sensor B (502), pressure sensor C (503), regulating valve A (601), and regulating valve B (602) are all connected to the control system via cables.

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