Ship, protective gas supply system thereof and waste smoke utilization device

Abstract

The utility model provides a ship, a protective gas supply system of the ship and a waste smoke utilization device. The waste smoke utilization device comprises a washing tower, a gas detector, a control valve and an elastic piece. The washing tower is communicated with a smoke outlet of the boiler through a smoke pipe and used for washing smoke exhausted from the smoke outlet. The washing tower is communicated with the oil tank. And the gas detector is used for detecting oxygen content information in the flue gas. The control valve is arranged on the flue gas pipe, is in communication connection with the gas detector and is used for controlling the on-off of the flue gas pipe, so that the flue gas pipe is in a conducting state when the oxygen content information is smaller than a preset oxygen content value. And the elastic piece is communicated between the smoke outlet and the smoke pipe. The elastic piece can stretch out and draw back along with the temperature change of smoke, namely, the axial size of a whole formed by combining the elastic piece and the smoke pipe can be changed through elastic deformation of the elastic piece, so that the smoke pipe can automatically adapt to thermal expansion and cold contraction caused by high-temperature smoke, stress generated by thermal expansion is prevented, and the stability and safety of the smoke pipe are protected.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ship, especially relates to a ship and its protection gas supply system, waste smoke utilization device. BACKGROUND

[0002] The ship such as oil tanker is used as loading and transporting crude oil or finished oil, because crude oil or finished oil belongs to flammable and explosive dangerous goods, oil gas in oil tank mixes with air, and reaches certain oxygen content, and extremely easy to cause fire and explosion accident. Therefore, in order to avoid the occurrence of oil tanker fire and explosion accident, the content ratio of oil gas and oxygen in oil tank is extremely important.

[0003] At present, the way of importing inert gas into oil tank is often used to control the content ratio of oil gas and oxygen in oil tank. Among them, the inert gas is mainly obtained by recycling or directly burning diesel oil of the flue gas generated by the boiler on the oil tanker. However, the flue gas generated by the boiler has high temperature, and the flue gas conveying device is easy to be damaged under the action of high temperature, because stress is easy to be generated. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of ship, and its protection gas supply system, waste smoke utilization device for producing protection gas for protecting oil tank by waste smoke, wherein, the pipeline for conveying flue gas in waste smoke utilization device can automatically adapt to thermal expansion and cold contraction caused by high temperature flue gas, and have good stability and security.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] According to an aspect of the present application, the present application provides a waste smoke utilization device for conveying protection gas into oil tank, the waste smoke utilization device comprises:

[0007] washing tower, which is communicated with the flue gas pipe and the exhaust port of the boiler, is used for washing flue gas discharged from the exhaust port to realize the cooling and impurity removal of flue gas, and the washing tower is communicated with the oil tank;

[0008] gas detector, which is used for detecting oxygen content information in flue gas discharged from the exhaust port;

[0009] control valve, which is arranged on the flue gas pipe, is communicated with the gas detector, and the control valve is used for controlling the on-off of the flue gas pipe, so that the flue gas pipe is in the on state when the oxygen content information is less than the preset oxygen content value;

[0010] An elastic member is connected between the exhaust port and the flue gas pipe to realize the communication between the scrubbing tower and the exhaust port, and the elastic member can stretch or contract with the change of the temperature of the flue gas to adjust the distance between the exhaust port and the flue gas pipe.

[0011] In some embodiments, the preset oxygen content value is 5%.

[0012] In some embodiments, one end of the elastic member away from the flue gas pipe is connected to the exhaust port through a connecting pipe.

[0013] The elastic member comprises a main body and two connecting heads arranged at the axial ends of the main body, the main body is a corrugated pipe, and the main body is connected between the connecting pipe and the flue gas pipe through the two connecting heads.

[0014] In some embodiments, the waste smoke utilization device further comprises a blowing mechanism having an air outlet connected to the flue gas pipe through a blowing pipe, the blowing mechanism is used to deliver air flow into the flue gas pipe to clean the flue gas pipe and blow the impurities deposited in the flue gas pipe towards the boiler.

[0015] In some embodiments, the connection point of the blowing pipe and the flue gas pipe is located downstream of the control valve, and a first valve is arranged on the blowing pipe to control the opening and closing of the blowing pipe.

[0016] The waste smoke utilization device further comprises a second valve arranged on the flue gas pipe and located downstream of the connection point of the blowing pipe and the flue gas pipe, and the second valve is used to control the opening and closing of the flue gas pipe.

[0017] In some embodiments, the scrubbing tower comprises a tower body, a spraying member and a water pump, the tower body is hollow inside, and the tower body is connected to the flue gas pipe, the spraying member is provided with spraying holes, the water inlet of the water pump is connected to a water source, the water outlet of the water pump is communicated with the spraying holes of the spraying member, and the water pump and the spraying member are matched to spray water into the tower body to cool and remove impurities in the flue gas in the tower body.

[0018] In some embodiments, the waste smoke utilization device further comprises a temperature detector for detecting a temperature signal in the flue gas pipe.

[0019] The waste smoke utilization device comprises a controller connected to the water pump and the temperature detector, and the controller is used to control the working frequency of the water pump according to the temperature signal.

[0020] In some embodiments, the waste smoke utilization device comprises a water seal mechanism, which is communicated with the downstream of the washing tower through a gas conveying pipe;

[0021] The water seal mechanism is hollow inside for containing water, and the outlet of the gas conveying pipe is immersed in the water inside the water seal mechanism;

[0022] The water seal mechanism has a gas outlet, which is located above the liquid level formed by the water.

[0023] According to another aspect of the present application, the present application also provides a protective gas supply system, which comprises a gas generating mechanism and the waste smoke utilization device as claimed in any one of the above, the gas generating mechanism is communicated with a fuel source, the gas generating mechanism is used for burning the fuel to generate smoke, and the gas generating mechanism or the smoke pipe of the waste smoke utilization device is in communication with the washing tower.

[0024] According to another aspect of the present application, the present application also provides a ship, which comprises a ship body and a boiler, an oil tank and the protective gas supply system as claimed above, which are arranged on the ship body, and the waste smoke utilization device of the protective gas supply system is connected between the smoke outlet of the boiler and the oil tank.

[0025] The oil tank is used for storing fuel oil, and a pressure detector is arranged on the oil tank for detecting the pressure signal in the oil tank; and a pressure relief valve is also arranged on the oil tank for pressure relief of the oil tank.

[0026] From the above technical solution, the present application at least has the following advantages and positive effects:

[0027] In the present application, the gas detector, the control valve and the washing tower cooperate to recycle and utilize the smoke with the oxygen content information of the boiler within the preset oxygen content value, so as to obtain the protective gas, and the protective gas is conveyed to the inside of the oil tank, so as to ensure that the oxygen content in the oil tank is within the normal range, and the protection purpose of the oil tank is achieved, and this mode can also achieve the purposes of energy saving, consumption reduction and emission reduction.

[0028] In addition, the smoke pipe is communicated with the smoke outlet through the elastic member, and the elastic member can stretch and contract with the temperature change of the smoke to adjust the distance between the smoke outlet and the smoke pipe, that is, the overall combination of the elastic member and the smoke pipe can change the axial size through the elastic deformation of the elastic member, so that the overall combination of the elastic member and the smoke pipe can automatically adapt to the thermal expansion and contraction caused by the high-temperature smoke, prevent stress caused by thermal expansion, and protect the stability and safety of the smoke pipe, and prolong the service life of the smoke pipe. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structural schematic view of the waste smoke utilization device in the present embodiment.

[0030] The reference signs are explained as follows:

[0031] 1, washing tower; 2, gas detector; 3, control valve; 4, elastic member; 41, main body part; 42, connecting head; 51, flue gas pipe; 52, connecting pipe; 53, purging pipe; 54, gas conveying pipe; 6, purging mechanism; 7, first valve; 8, second valve; 9, temperature detector; 10, water seal mechanism; 11, gas outlet. DETAILED DESCRIPTION

[0032] The typical embodiments embodying the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can have various changes in different embodiments, which do not deviate from the scope of the present application, and the description and drawings in the essence are used as a description, not to limit the present application.

[0033] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indication of direction or position relationship (such as up, down, left, right, front and back, etc.) is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation. When these elements are in the position shown in the drawings, these descriptions are appropriate. If the position of these elements changes, the indication of these directions also changes accordingly.

[0034] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0035] The present application provides a waste smoke utilization device, which can recycle the flue gas generated during the operation of the boiler and the like to obtain a protective gas, and deliver the protective gas to the inside of the oil tank to ensure that the oxygen content in the inside of the oil tank is within a normal range, so as to achieve the purpose of protecting the oil tank, and this way can also achieve the purposes of energy saving, consumption reduction and emission reduction.

[0036] The specific embodiments of the waste smoke utilization device of the present application will be described in detail below with reference to the accompanying drawings.

[0037] Figure 1 The structure of the waste smoke utilization device in the present embodiment is shown in the schematic view.

[0038] Reference Figure 1The waste smoke utilization device comprises a washing tower 1, a gas detector 2, a control valve 3 and an elastic member 4. The washing tower 1 is communicated with the smoke outlet of the boiler through a smoke pipe 51, and is used for washing the smoke discharged from the smoke outlet to realize the cooling and impurity removal of the smoke. The washing tower 1 is communicated with the oil tank. The gas detector 2 is used for detecting the oxygen content information in the smoke discharged from the smoke outlet. The control valve 3 is arranged on the smoke pipe 51, and is in communication connection with the gas detector 2, and is used for controlling the on-off of the smoke pipe 51, so that when the oxygen content information is less than a preset oxygen content value, the smoke pipe 51 is in the on state. The elastic member 4 is communicated between the smoke outlet and the smoke pipe 51 to realize the communication between the washing tower 1 and the smoke outlet. The elastic member 4 can stretch and contract with the change of the temperature of the smoke.

[0039] In the present application, the gas detector 2, the control valve 3 and the washing tower 1 can cooperate to recycle the smoke discharged from the boiler and having the oxygen content information less than the preset oxygen content value, so as to obtain the protective gas, and deliver the protective gas to the inside of the oil tank, so as to ensure that the oxygen content in the inside of the oil tank is within the normal range, so as to achieve the protection purpose of the oil tank, and the energy saving, consumption reduction and emission reduction purposes can also be achieved.

[0040] Further, the smoke pipe 51 is communicated with the smoke outlet through the elastic member 4, and the elastic member 4 can stretch and contract with the change of the temperature of the smoke to adjust the distance between the smoke outlet and the smoke pipe 51, that is, the whole formed by the combination of the elastic member 4 and the smoke pipe 51 can change the axial size by the elastic deformation of the elastic member 4, so that the whole formed by the combination of the elastic member 4 and the smoke pipe 51 can automatically adapt to the thermal expansion and contraction caused by the high-temperature smoke, prevent the stress caused by the thermal expansion, so as to protect the stability and safety of the smoke pipe 51, and prolong the service life of the smoke pipe 51.

[0041] In the present embodiment, the washing tower 1 is communicated with the smoke outlet of the boiler, and is used for washing the smoke discharged from the smoke outlet to realize the cooling and impurity removal of the smoke. Specifically, the washing tower 1 has an air inlet, and the air inlet of the washing tower 1 is communicated with the smoke outlet through the smoke pipe 51, so that the smoke discharged from the smoke outlet of the boiler can be delivered to the inside of the washing tower 1 through the smoke pipe 51.

[0042] The washing tower 1 is communicated with the oil tank, so as to deliver the protective gas obtained after the cooling and impurity removal into the oil tank.

[0043] The washing tower 1 comprises a tower body, a spraying member and a water pump. The tower body is hollow inside, and the tower body is communicated with the smoke pipe 51. The spraying member is provided with spraying holes. The water inlet of the water pump is communicated with a water source, the water outlet of the water pump is communicated with the spraying holes of the spraying member, and the water pump is used in cooperation with the spraying member to spray water into the inside of the tower body to cool and remove impurities of the smoke in the inside of the tower body.

[0044] Specifically, the impurity removal here mainly refers to desulfurization treatment of the flue gas, and the dust particles in the flue gas can fall to the bottom of the tower during the spraying process.

[0045] In this embodiment, the gas detector 2 is used to detect the oxygen content information in the flue gas discharged from the smoke outlet.

[0046] The control valve 3 is arranged on the flue gas pipe 51, and the control valve 3 is in communication connection with the gas detector 2. The control valve 3 is used to control the on-off of the flue gas pipe 51, so that when the oxygen content information is less than the preset oxygen content value, the flue gas pipe 51 is in a conductive state, so that the flue gas meeting the oxygen content requirement can enter the flue gas pipe 51, and the part of the flue gas is recycled.

[0047] In this embodiment, the preset oxygen content value is 5%, that is, when the oxygen content value is less than 5%, the control valve 3 controls the flue gas pipe 51 to be in a conductive state, so that the flue gas meeting the oxygen content requirement can enter the flue gas pipe 51; when the oxygen content value is greater than 5%, the control valve 3 controls the flue gas pipe 51 to be in a cut-off state.

[0048] In this embodiment, the elastic member 4 is connected between the smoke outlet and the flue gas pipe 51, so as to realize the communication between the scrubbing tower 1 and the smoke outlet. Moreover, the elastic member 4 can stretch and contract with the change of the temperature of the flue gas, so as to adjust the distance between the smoke outlet and the flue gas pipe 51. Since the flue gas generated in the working process of the boiler has a high temperature, the whole formed by the combination of the elastic member 4 and the flue gas pipe 51 is taken as a flue gas conveying channel, so that the elastic deformation of the elastic member 4 can be used to change the axial size, so as to facilitate the whole formed by the combination of the elastic member 4 and the flue gas pipe 51 to automatically adapt to the thermal expansion and contraction caused by the high-temperature flue gas, prevent stress caused by thermal expansion, and protect the stability and safety of the flue gas pipe 51, thereby prolonging the service life of the flue gas pipe 51.

[0049] Specifically, one end of the elastic member 4 away from the flue gas pipe 51 is connected with the smoke outlet through the connecting pipe 52.

[0050] The elastic member 4 includes a main body part 41 and two connecting heads 42 arranged at the axial two ends of the main body part 41. The main body part 41 is a bellows formed by foldable corrugated sheets connected in the folding and stretching direction, and the stretching and contraction are realized by the unfolding or contraction of the corrugated sheets. The main body part 41 is connected between the connecting pipe 52 and the flue gas pipe 51 through the two connecting heads 42. Moreover, the connecting pipe 52 and the flue gas pipe 51 are respectively in sealing connection with the corresponding connecting heads 42, so as to avoid the leakage of the flue gas from the joint, thereby ensuring that the whole formed by the connection of the connecting pipe 52, the elastic member 4 and the flue gas pipe 51 has good sealing performance.

[0051] Reference Figure 1In the embodiment, the waste smoke utilization device further comprises a blowing mechanism 6, the blowing mechanism 6 has an air outlet, the air outlet is communicated with the flue gas pipe 51 through a blowing pipe 53, the blowing mechanism 6 is used for conveying airflow into the flue gas pipe 51 to clean the flue gas pipe 51, so as to blow the impurities (such as dust particles and other particulate matters) deposited in the flue gas pipe 51 to the boiler direction, make the impurities concentrate at the flue gas outlet of the boiler, so as to facilitate centralized treatment, so as to achieve the purpose of cleaning and dredging the flue gas pipe 51, so as to ensure the efficiency of conveying flue gas by the flue gas pipe 51.

[0052] Specifically, the communication point of the blowing pipe 53 and the flue gas pipe 51 is located downstream of the control valve 3.

[0053] The blowing pipe 53 is provided with a first valve 7 for controlling the opening and closing of the blowing pipe 53, and the opening and closing of the blowing pipe 53 and the flue gas pipe 51 can be realized by operating the first valve 7.

[0054] The waste smoke utilization device further comprises a second valve 8, the second valve 8 is arranged on the flue gas pipe 51 and located downstream of the communication point of the blowing pipe 53 and the flue gas pipe 51, the second valve 8 is used for controlling the opening and closing of the flue gas pipe 51.

[0055] Specifically, when it is needed to convey flue gas from the flue gas pipe 51 to the washing tower 1, the first valve 7 is closed to make the blowing pipe 53 in the cut-off state, and the second valve 8 is opened to make the flue gas pipe 51 in the conducting state, so that the flue gas can smoothly pass through the communication point of the blowing pipe 53 and the flue gas pipe 51 and continue to flow downstream. When the waste smoke utilization device is closed or the flue gas pipe 51 is blocked by impurities to affect the conveying efficiency, the first valve 7 is opened to make the blowing pipe 53 in the conducting state, and the second valve 8 is closed to make the flue gas pipe 51 in the cut-off state at the downstream part of the communication point of the blowing pipe 53 and the flue gas pipe 51, so as to realize that the airflow conveyed by the blowing mechanism 6 blows the impurities (such as dust particles and other particulate matters) deposited in the flue gas pipe 51 to the boiler direction, so as to avoid that the airflow carrying dust particles and having high oxygen content enters the washing tower 1.

[0056] Reference Figure 1 The waste smoke utilization device further comprises a temperature detector 9, the temperature detector 9 is used for detecting a temperature signal in the flue gas pipe 51.

[0057] The waste smoke utilization device comprises a controller, the controller is in communication connection with the water pump, the controller is in communication connection with the temperature detector 9, and the controller is used for controlling the working frequency of the water pump according to the temperature signal, that is, controlling the size of the water flow sprayed by the spraying piece according to the temperature signal, so as to ensure the cooling effect of the flue gas.

[0058] The waste smoke utilization device comprises a water seal mechanism 10, the water seal mechanism 10 is communicated with the downstream of the washing tower 1 through a gas conveying pipe 54.

[0059] The water seal mechanism 10 is hollow inside for containing water. The outlet of the gas delivery pipe 54 is immersed in the water inside the water seal mechanism 10, so that the protective gas delivered by the gas delivery pipe 54 can enter the water inside the water seal mechanism 10, and further achieve desulfurization, dust removal and the like of the protective gas.

[0060] Further, the water seal mechanism 10 has a gas outlet 11 for communicating with the oil tank. The gas outlet 11 is located above the water level formed by the water, and at this time, such a design form can prevent the combustible gas in the oil tank from flowing back to the scrubbing tower 1 or even the boiler.

[0061] According to another aspect of the present application, the present application also provides a protective gas supply system, comprising a gas generating mechanism and the above-mentioned waste smoke utilization device. Wherein, the gas generating mechanism is in communication with the fuel source, and the gas generating mechanism is used for burning the fuel to generate flue gas. The flue gas pipe 51 of the gas generating mechanism or the waste smoke utilization device is in communication with the scrubbing tower 1, that is, the gas generating mechanism and the flue gas pipe 51 adopt an open and standby form, so that the protective gas supply system can adapt to different working conditions, unexpected situations and the like, and ensure that the protective gas supply system can normally supply protective gas.

[0062] Specifically, the flue gas generated by the boiler is the main mode for providing protective gas, and the gas generating mechanism is used to cope with special situations, for example: the boiler fails, and the flue gas generated by the boiler cannot meet the requirement of oxygen content for a long time, or when the boiler is in a closed state, and the like.

[0063] According to another aspect of the present application, the present application also provides a ship, comprising a ship body and a boiler, an oil tank and a protective gas supply system as above provided on the ship body. Wherein, the waste smoke utilization device is connected between the flue gas outlet of the boiler and the oil tank.

[0064] The flue gas outlet of the boiler is communicated with a flue gas pipe, and the flue gas pipe is in communication with the outside for flue gas discharge of the boiler. The flue gas pipe is provided with an adjusting valve, and the amount of flue gas discharged by the flue gas pipe is adjusted by adjusting the opening degree of the adjusting valve. Specifically, the connecting pipe 52 of the waste smoke utilization device is communicated with the flue gas pipe.

[0065] The oil tank is used for storing fuel oil. The oil tank is provided with a pressure detector for detecting a pressure signal in the oil tank. The oil tank is also provided with a pressure relief valve for pressure relief of the oil tank. The pressure relief valve is in communication connection with the pressure detector, and the pressure relief valve can be opened and closed according to the pressure signal, so that when the pressure in the oil tank reaches a certain degree, the pressure relief valve can be automatically opened, so that the gas in the oil tank can escape, so as to release the pressure in the oil tank, and ensure the safety of the oil tank.

[0066] Exemplarily, the above-mentioned protective gas supply mode of the ship is as follows:

[0067] When the ship is in the state of loading and unloading oil, the boiler is in the working state to generate the flue gas required for preparing the protective gas, and the flue gas is discharged through the flue gas outlet.

[0068] The oxygen content information of the flue gas discharged through the flue gas outlet is detected by the gas detector 2. When the detected oxygen content value is greater than 5%, the adjusting valve on the flue gas pipe is in the fully open state, and the control valve 3 on the flue gas pipe 51 is in the closed state, so that the flue gas is discharged through the flue gas pipe. When the detected oxygen content value is less than 5%, since the flue gas generated by the boiler is too large, which exceeds the amount of flue gas required by the waste gas utilization device per unit time, at this time, the adjusting valve on the flue gas pipe is in the partially closed state, the control valve 3 on the flue gas pipe 51 and the second valve 8 are in the open state, and the first valve 7 on the purge pipe 53 is in the closed state, so that part of the flue gas is discharged through the flue gas pipe while meeting the flue gas required by the waste gas utilization device. The flue gas transported into the washing tower 1 through the connecting pipe 52, the elastic member 4 and the flue gas pipe 51 is cooled, desulfurized and dedusted through the joint action of the water pump and the spraying member, and then the obtained protective gas enters the water sealing mechanism 10 for further cooling, desulfurization and dedusting, and then is output through the gas outlet 11 of the water sealing mechanism 10 and transported into the oil tank. In the process, the temperature monitor detects the temperature signal in the flue gas pipe 51 continuously, so that the controller can control the working frequency of the water pump according to the temperature signal.

[0069] In special cases, the flue gas can also be generated by the gas generating mechanism by burning fuel.

[0070] From the above technical solution, the utility model has at least the following advantages and positive effects:

[0071] In the present application, the gas detector, the control valve and the washing tower cooperate to recycle and utilize the flue gas discharged by the boiler at the preset oxygen content value, so as to obtain the protective gas, and the protective gas is transported into the oil tank, so as to ensure that the oxygen content in the oil tank is within the normal range, so as to achieve the purpose of protecting the oil tank, and this method can also achieve the purposes of energy saving, consumption reduction and emission reduction.

[0072] Moreover, the flue gas pipe is communicated with the flue gas outlet through the elastic member, and the elastic member can stretch and contract with the temperature change of the flue gas to adjust the distance between the flue gas outlet and the flue gas pipe, that is, the overall combination of the elastic member and the flue gas pipe can change the axial size through the elastic deformation of the elastic member, so that the overall combination of the elastic member and the flue gas pipe can automatically adapt to the thermal expansion and contraction caused by the high-temperature flue gas, prevent stress caused by thermal expansion, and protect the stability and safety of the flue gas pipe, thereby prolonging the service life of the flue gas pipe.

[0073] While the present application has been described with reference to several exemplary embodiments, it is understood that the words that have been used are words of description and illustration, rather than words of limitation. As mentioned above, the present application is capable of taking many forms of implementation and being practiced in various ways, and the above description is not intended to limit the application in any way, except as required by the appended claims and their equivalents.

Claims

1. A waste smoke utilization device for delivering a protective gas into an oil tank, characterized by, The waste smoke utilization device comprises: a washing tower, which is communicated with the smoke outlet of the boiler through a smoke pipe, and is used for washing the flue gas discharged from the smoke outlet to achieve the cooling and impurity removal of the flue gas; the washing tower is communicated with the oil tank; a gas detector, which is used for detecting the oxygen content information in the flue gas discharged from the smoke outlet; a control valve, which is arranged on the smoke pipe and is in communication connection with the gas detector; the control valve is used for controlling the on-off of the smoke pipe, so that when the oxygen content information is less than a preset oxygen content value, the smoke pipe is in the on state; an elastic member, which is communicated between the smoke outlet and the smoke pipe to achieve the communication between the washing tower and the smoke outlet; the elastic member can stretch and contract with the temperature change of the flue gas to adjust the distance between the smoke outlet and the smoke pipe.

2. The waste smoke utilizing apparatus according to claim 1, characterized by The preset oxygen content value is 5%.

3. The waste smoke utilizing apparatus according to claim 1, characterized by One end of the elastic member away from the smoke pipe is communicated with the smoke outlet through a connecting pipe; The elastic member comprises a main body portion and two connecting heads arranged on the axial ends of the main body portion; the main body portion is a corrugated pipe; and the main body portion is communicated between the connecting pipe and the smoke pipe through the two connecting heads.

4. The waste smoke utilizing apparatus according to claim 1, characterized by The waste smoke utilization device further comprises a blowing mechanism, which has an air outlet; the air outlet is communicated with the smoke pipe through a blowing pipe; the blowing mechanism is used for conveying a gas flow into the smoke pipe to clean the smoke pipe and blow the impurities deposited in the smoke pipe towards the boiler.

5. The waste smoke utilizing apparatus according to claim 4, characterized by The connection point of the blowing pipe and the smoke pipe is located downstream of the control valve; a first valve for controlling the on-off of the blowing pipe is arranged on the blowing pipe; The waste smoke utilization device further comprises a second valve, which is arranged on the smoke pipe and located downstream of the connection point of the blowing pipe and the smoke pipe; the second valve is used for controlling the on-off of the smoke pipe.

6. The waste smoke utilizing apparatus according to claim 1, characterized by The washing tower comprises a tower body, a spraying member and a water pump; the tower body is hollow; the tower body is communicated with the smoke pipe; the spraying member is provided with spraying holes; the water inlet of the water pump is communicated with a water source; the water outlet of the water pump is communicated with the spraying holes of the spraying member; and the water pump and the spraying member are cooperated to spray water into the tower body to cool and remove the impurities in the flue gas in the tower body.

7. The waste smoke utilizing apparatus according to claim 6, characterized by The waste smoke utilization device further comprises a temperature detector, which is used for detecting a temperature signal in the smoke pipe; The waste smoke utilization device comprises a controller, which is in communication connection with the water pump and the temperature detector; and the controller is used for controlling the working frequency of the water pump according to the temperature signal.

8. The waste smoke utilizing apparatus according to claim 6, characterized by The waste smoke utilization device comprises a water seal mechanism, which is communicated downstream of the washing tower through a gas conveying pipe; The water seal mechanism is hollow and is used for containing water; the outlet of the gas conveying pipe is immersed in the water in the water seal mechanism; The water seal mechanism has a gas outlet, which is located above the liquid level formed by the water.

9. A protective gas supply system characterized by comprising: The waste smoke utilization device according to any one of claims 1 to 8, wherein a gas generating mechanism is provided, the gas generating mechanism is connected to a fuel source, the gas generating mechanism is configured to burn the fuel to generate flue gas, and the gas generating mechanism or a flue gas pipe of the waste smoke utilization device is connected to the scrubber.

10. A vessel characterised in that, The waste smoke utilization device according to claim 9, wherein the ship comprises a hull, a boiler, an oil tank, and a protective gas supply system, the waste smoke utilization device of the protective gas supply system is connected between a flue gas outlet of the boiler and the oil tank. The oil tank is configured to store fuel, a pressure detector is provided on the oil tank and configured to detect a pressure signal in the oil tank, and a pressure relief valve is provided on the oil tank and configured to relieve pressure in the oil tank.

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