Steam generating device

Abstract

The utility model belongs to the technical field of petrochemical engineering, and discloses a steam generating device which comprises a shell and a module. A water accumulation cavity and a steam cavity which are communicated with each other are formed in the shell, an inflow port communicated with the water accumulation cavity is formed in the side wall of the shell, and an exhaust port communicated with the steam cavity is further formed in the side wall of the shell, so that water for preparing steam can be introduced into the water accumulation cavity, and the water for preparing the steam is heated and boiled to prepare the steam. Steam can be discharged from the exhaust port; the oil conveying module is arranged in the water accumulation cavity, the inlet of the oil conveying pipe is communicated with the outlet of the oil inlet pipe, and the outlet of the oil conveying pipe is communicated with the inlet of the oil outlet pipe, so that a liquid petroleum product with a specific temperature can enter the oil conveying pipe through the oil inlet pipe, and water for preparing steam in the water accumulation cavity can exchange heat with the oil conveying pipe; therefore, the steam generating device can recover heat of the liquid petroleum product, the heat is prevented from being wasted, and the preparation cost of the steam is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of petroleum chemical industry, especially relates to a steam generating device. BACKGROUND

[0002] Steam is widely used in the field of petroleum chemical industry as a secondary energy, and a large amount of primary energy (coal, oil, natural gas) is consumed to make water boil to prepare steam, so that the preparation cost of steam is too high. At the same time, the oil fractionating column fractionates oil to produce various liquid petroleum products with specific temperatures, and the heat of these liquid petroleum products cannot be recycled and reused, resulting in waste of heat.

[0003] Therefore, there is an urgent need for a steam generating device to solve the above technical problems. INVENTION CONTENTS

[0004] The utility model discloses a steam generating device, which can recycle the heat of the liquid petroleum products produced by oil fractionation to prepare steam, prevent heat waste, and reduce the preparation cost of steam.

[0005] To achieve this purpose, the utility model adopts the following technical scheme:

[0006] A steam generating device is provided, comprising:

[0007] A shell is provided with a water accumulation cavity and a steam cavity in communication with each other in the shell, an inflow port in communication with the water accumulation cavity is arranged on the side wall of the shell, and an exhaust port in communication with the steam cavity is also arranged on the side wall of the shell.

[0008] An oil feeding module is arranged in the water accumulation cavity, the oil feeding module comprises an oil feeding pipe, an oil inlet pipe and an oil outlet pipe, the inlet of the oil feeding pipe is in communication with the outlet of the oil inlet pipe, the outlet of the oil feeding pipe is in communication with the inlet of the oil outlet pipe, and the water for preparing steam in the water accumulation cavity can exchange heat with the oil feeding pipe.

[0009] Preferably, the number of oil feeding modules is at least two, and the at least two oil feeding modules are arranged in sequence along the height direction of the shell.

[0010] Preferably, a heat insulation layer is arranged between the two adjacent oil feeding modules.

[0011] Preferably, the oil feeding module has N oil feeding pipes, the N oil feeding pipes are arranged side by side, the outlet of the N-1 oil feeding pipe is in communication with the inlet of the N oil feeding pipe, and the volumes of the oil feeding modules with different numbers of oil feeding pipes are the same.

[0012] Preferably, a hydraulic sensor is arranged at the inlet of the oil feeding pipe; and / or

[0013] A hydraulic sensor is arranged at the outlet of the oil feeding pipe.

[0014] Preferably, the steam generating device further comprises a waterproof and breathable membrane, which is arranged in the shell to separate the water accumulation cavity and the steam cavity.

[0015] Preferably, the shell is provided with an observation window on the side wall corresponding to the waterproof and breathable membrane.

[0016] Preferably, the steam generating device further comprises a filter screen, which is arranged in the shell and located on the side of the waterproof and breathable membrane facing the steam cavity.

[0017] Preferably, the shell is further provided with a mounting and cleaning port, and a blocking piece is fixed at the mounting and cleaning port.

[0018] Preferably, the oil delivery module is detachably fixed on the side wall of the shell.

[0019] The steam generating device has the advantages that:

[0020] The steam generating device has the advantages that: BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic view of the steam generating device provided by the utility model;

[0022] Figure 2 is Figure 1 a sectional view in the direction of A-A in figure

[0023] in the figure:

[0024] 1, shell; 11, water accumulation cavity; 12, steam cavity; 13, inflow port; 14, exhaust port; 15, mounting and cleaning port;

[0025] 2, oil delivery module; 21, oil delivery pipe; 22, oil inlet pipe; 23, oil outlet pipe;

[0026] 3, heat insulation layer;

[0027] 4. waterproof and breathable membrane;

[0028] 5. viewing window;

[0029] 6. filter screen;

[0030] 7. blocking member; DETAILED DESCRIPTION

[0031] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0032] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] In the description of the embodiment, the terms "up", "down", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0035] In the prior art, a large amount of primary energy is consumed to boil water to prepare steam, which is a direct cause of high steam preparation cost, and a fractionating tower fractionates oil to prepare various liquid petroleum products with specific temperatures, and the heat possessed by the liquid petroleum products is recovered to heat water for preparing steam, which is a key to reduce steam cost, and the steam generating device provided by the utility model is introduced in detail below.

[0036] Figure 1 The structure schematic diagram of the steam generating device provided by the utility model is shown, as Figure 1 The steam generating device provided by the embodiment includes a shell 1 and an oil conveying module 2. The shell 1 is provided with a water accumulation cavity 11 and a steam cavity 12 which communicate with each other, the side wall of the shell 1 is provided with an inflow port 13 which communicates with the water accumulation cavity 11, and the side wall of the shell 1 is further provided with an exhaust port 14 which communicates with the steam cavity 12; the oil conveying module 2 is arranged in the water accumulation cavity 11, and the oil conveying module 2 includes an oil conveying pipe 21, an oil inlet pipe 22 and an oil outlet pipe 23, the inlet of the oil conveying pipe 21 communicates with the outlet of the oil inlet pipe 22, the inlet of the oil inlet pipe 22 communicates with a petroleum fractionating tower, the outlet of the oil conveying pipe 21 communicates with the inlet of the oil outlet pipe 23, and the inlet of the oil outlet pipe 23 communicates with a liquid petroleum product storage device.

[0037] Preferably, the steam cavity 12 is arranged above the water accumulation cavity 11, so that after the water for preparing steam which is introduced into the water accumulation cavity 11 is heated and boiled to generate steam by heat exchange with the liquid petroleum product in the heat exchange pipe of the heat exchange module, the steam rises into the steam cavity 12 due to smaller density and is discharged from the exhaust port 14, preventing the steam from condensing due to failure to be discharged from the exhaust port 14 in time, flowing back to the water accumulation cavity 11 to form water for preparing steam again, improving the steam preparation efficiency of the steam generating device, and preventing the water for preparing steam in the water accumulation cavity 11 from flowing into the steam cavity 12 due to gravity and flowing out from the exhaust port 14, improving the reliability of the steam generating device.

[0038] The steam generating device provided by the embodiment is characterized in that: the steam cavity 12 and the water storage cavity 11 are arranged in the shell 1 and communicate with each other; the inflow port 13 is arranged on the side wall of the shell 1 and communicates with the water storage cavity 11, so that the water for generating steam can be introduced into the water storage cavity 11 through the inflow port 13; the exhaust port 14 is arranged on the side wall of the shell 1 and communicates with the steam cavity 12, so that the water for generating steam can flow out of the exhaust port 14 through the steam cavity 12 after being heated and boiled to generate steam; the oil conveying module 2 is arranged in the water storage cavity 11, so that the liquid petroleum product with a specific temperature, which is obtained by the fractional distillation tower, can be introduced into the oil conveying pipe 21 through the inlet of the oil conveying pipe 22, the oil conveying pipe 21 is heated by the water for generating steam introduced into the water storage cavity 11 to heat the water for generating steam, the water for generating steam is heated and boiled to generate steam, and the steam generating device can recover the heat of the liquid petroleum product, prevent the heat from being wasted, and reduce the cost of generating steam.

[0039] It can be understood that the oil conveying pipe 21 in the oil conveying module 2 can not only input the liquid petroleum product with a specific temperature from the inlet of the oil conveying pipe 22, but also can input other liquids with a specific temperature, such as industrial wastewater with a specific temperature, as long as the liquid introduced into the oil conveying pipe 21 in the oil conveying module 2 has a temperature higher than the boiling point of water, can exchange heat with the water for generating steam to heat the water for generating steam, and make the water for generating steam boil to generate steam, which will not be described here.

[0040] Petroleum fractional distillation is a method for separating a mixture of several different boiling points in petroleum. According to different fractional distillation processes, the number of types of liquid petroleum products obtained by fractional distillation of petroleum is not the same. If a steam generating device is arranged for each type of liquid petroleum product to recover heat, the cost of recovering heat of the liquid petroleum product will be greatly increased, and more steam generating devices need to be arranged, which increases the cost of generating steam. To solve the above technical problems, as shown in Figure 1 The number of the oil conveying modules 2 is at least two, and the at least two oil conveying modules 2 are arranged along the height direction of the shell 1 in sequence, so that the steam generating device can recover heat of two or more types of liquid petroleum products, and a steam generating device does not need to be arranged for each type of liquid petroleum product, the steam generating efficiency of the steam generating device is improved, and the cost of equipment for recovering heat of the liquid petroleum product is reduced. It should be noted that the number of the oil conveying modules 2 can be one, two, three, four, or even more, as long as the number of types of liquid petroleum products obtained by the fractional distillation tower is the same as the number of the oil conveying modules 2 of a single steam generating device, which will not be described here.

[0041] As shown in Figure 1As shown, the oil delivery module 2 is detachably fixed on the side wall of the shell 1, so that the number of oil delivery modules 2 in the steam generating device can be adjusted according to the number of types of liquid petroleum products produced by different fractionation processes, and the number of oil delivery modules 2 is the same as the number of types of liquid petroleum products that need to recover heat, so that the steam generating device can be normally used by adjusting the number of oil delivery modules 2 under different fractionation process conditions, without the need to manufacture a new steam generating device, thereby improving the versatility of the steam generating device.

[0042] Optionally, a heat insulation layer 3 is arranged between the adjacent two oil delivery modules 2, so as to prevent the liquid petroleum products in the oil delivery pipe 21 of the oil delivery module 2 from exchanging heat with the liquid petroleum products in the oil delivery pipe 21 of the adjacent oil delivery module 2, and further prevent the above heat exchange from adversely affecting the heat exchange between the water for preparing steam and the liquid petroleum products, thereby improving the steam preparation efficiency of the steam generating device. Specifically, the heat insulation layer 3 is a heat insulation plate, which is fixed on the inner side of the side wall of the shell 1 by a first locking member. Alternatively, the first locking member can be a bolt, so as to detachably fix the heat insulation layer 3 on the inner side of the side wall of the shell 1. When the heat insulation layer 3 is damaged, it can be detached for replacement. The first locking member can also be a weld, so as to weld the heat insulation layer 3 to the inner side of the side wall of the shell 1, thereby ensuring that the heat insulation layer 3 can be stably fixed on the inner side of the side wall of the shell 1. It is worth noting that the heat insulation layer 3 cannot hinder the flow of the water for preparing steam in the water accumulation cavity 11, but can only isolate the liquid petroleum products in the oil delivery pipes 21 of the adjacent oil delivery modules 2 from exchanging heat.

[0043] The greater the temperature difference between the two liquid mediums, the more conducive to heat exchange between the two liquid mediums, thereby improving the heat exchange efficiency. Taking the steam generator provided in the embodiment as an example, assuming that the temperature of the steam preparation water when entering the water storage cavity 11 is 20°C, the liquid petroleum product in the oil conveying pipe 21 of the oil conveying module 2 near the inflow port 13 first exchanges heat with the steam preparation water. If the temperature of the liquid petroleum product is 200°C, the temperature difference is 180°C, and the heat exchange efficiency is extremely high. If the temperature of the liquid petroleum product in the oil conveying pipe 21 of the oil conveying module 2 is 160°C, the temperature difference is 140°C, and the heat exchange efficiency is obviously lower than that of the temperature difference of 180°C. The device provided in the embodiment often has at least two heat exchange modules. Only when the steam preparation water that exchanges heat with the liquid petroleum product in each heat exchange module maintains a large temperature difference can the overall heat exchange efficiency of the oil conveying pipe 21 of the oil conveying device be ensured to be the highest. Preferably, in order to improve the overall heat exchange efficiency of the oil conveying pipe 21 and improve the steam preparation efficiency of the steam generator, the temperature of the liquid petroleum product in the oil conveying pipe 21 of one oil conveying module 2 is higher than that of the liquid petroleum product in the oil conveying pipe 21 of the adjacent oil conveying module 2 above. The inflow port 13 corresponding to the lowermost oil conveying module 2 is arranged on the side wall of the shell 1. Thus, when the steam preparation water just enters the water storage cavity 11, the temperature of the liquid petroleum product in the oil conveying pipe 21 of the lowermost oil conveying module 2 is higher than that of the liquid petroleum product in the oil conveying pipe 21 of the other oil conveying modules 2, so that the steam preparation water and the liquid petroleum product have the maximum temperature difference, thereby improving the heat exchange efficiency between the steam preparation water and the liquid petroleum product. When the steam preparation water continues to enter the water storage cavity 11 through the inflow port 13, the steam preparation water that has exchanged heat with the liquid petroleum product in the oil conveying pipe 21 of the lowermost oil conveying module 2 moves upward to the second oil conveying module 2 and exchanges heat with the liquid petroleum product in the oil conveying pipe 21 of the second oil conveying module 2 again. The steam preparation water and the liquid petroleum product in the oil conveying pipe 21 of the second oil conveying module 2 still have a large temperature difference, and so on. In this way, the heat exchange efficiency between the overall oil conveying pipe 21 of the oil conveying module 2 and the steam preparation water can be improved, and the steam preparation efficiency of the steam generator can be improved.

[0044] Figure 2 A cross-sectional view along the direction of A-A in FIG. 1 is shown. Figure 1 A cross-sectional view along the direction of A-A in FIG. 1 is shown. Figures 1 to 2As shown, the oil delivery module 2 has N oil delivery pipes 21, the N oil delivery pipes 21 are arranged side by side, the outlet of the N-1 oil delivery pipe 21 communicates with the inlet of the N oil delivery pipe 21, the oil delivery module 2 with different number of oil delivery pipes 21 has the same volume, so that when the volume of the oil delivery module 2 is a constant value, the more the number of oil delivery pipes 21 the oil delivery module 2 has, the smaller the diameter of the oil delivery pipe 21, when the flow rate of the liquid petroleum product entering the oil delivery pipe 21 is a constant value, the smaller the diameter of the oil delivery pipe 21, the higher the flow rate of the liquid petroleum product in the oil delivery pipe 21, so that the heat exchange efficiency between the liquid petroleum product in the oil delivery pipe 21 of the oil delivery module 2 and the water for preparing steam can be improved, so that the efficiency of the steam generator preparing steam can be improved. It is worth noting that the number of oil delivery pipes 21 is not limited to one, two, three, four or even more, and the heat exchange efficiency between the liquid petroleum product in the oil delivery pipe 21 of the single oil delivery module 2 and the water for preparing steam can be set according to the efficiency of the steam generator preparing steam, and the number of oil delivery pipes 21 of the single oil delivery module 2 can be reasonably selected according to the heat exchange efficiency, as long as the steam preparation efficiency of the steam generator meets the use demand.

[0045] Optionally, each oil delivery pipe 21 has a specific standard operating pressure, when the same flow rate of liquid petroleum product is input into the oil delivery pipe 21 through the oil inlet pipe 22, the number of oil delivery pipes 21 of the oil delivery module 2 is different, resulting in different operating pressures of the oil delivery pipe 21, if the actual operating pressure of the liquid petroleum product in the oil delivery pipe 21 is higher than the standard operating pressure of the oil delivery pipe 21, the oil delivery pipe 21 cannot guarantee safe and stable delivery of the liquid petroleum product. To solve the above technical problem, a hydraulic sensor is arranged at the inlet of the oil delivery pipe 21, so that the pressure value borne by the oil delivery pipe 21 when the liquid petroleum product enters the oil delivery pipe 21 can be known; similarly, a hydraulic sensor is arranged at the outlet of the oil delivery pipe 21, so that the pressure value borne by the oil delivery pipe 21 when the liquid petroleum product is discharged from the oil outlet pipe 23 through the oil delivery pipe 21 can be known. By arranging a hydraulic sensor at the inlet and / or outlet of the oil delivery pipe 21, the pressure borne by the oil delivery pipe 21 can be monitored in real time, when the pressure value fed back by the hydraulic sensor exceeds the standard operating pressure of the oil delivery pipe 21, the input of the liquid petroleum product into the oil delivery pipe 21 can be stopped in time to prevent damage to the oil delivery pipe 21 and improve the reliability of the operation of the steam generator.

[0046] Steam is a secondary energy that can be directly used by petroleum chemical equipment, but the water for preparing steam is not, if the water for preparing steam flows out of the exhaust port 14 of the steam generator, the quality of the steam generated by the steam generator will be reduced, and the petroleum chemical equipment communicated with the exhaust port 14 will be damaged. To solve the above technical problem, continue as Figures 1 to 2As shown, the steam generating device further comprises a waterproof air-permeable membrane 4 arranged in the housing 1 to separate the water accumulation cavity 11 from the steam cavity 12, so that the water for preparing steam entering the water accumulation cavity 11 cannot enter the steam cavity 12 through the waterproof air-permeable membrane 4 and flow out from the exhaust port 14, and the steam prepared by heating and boiling the water for preparing steam can enter the steam cavity 12 through the waterproof air-permeable membrane 4 and be discharged from the exhaust port 14, preventing the water for preparing steam in the water accumulation cavity 11 from directly flowing into the steam cavity 12 and being discharged from the exhaust port 14 due to excessive water for preparing steam being introduced, thereby reducing the quality of the steam prepared by the steam generating device. Specifically, the waterproof air-permeable membrane 4 can be detachably fixed to the inner side of the side wall of the housing 1 by the second locking member, so that the waterproof air-permeable membrane 4 can be replaced when it reaches the end of its service life. It should be noted that the waterproof air-permeable membrane 4 often has a certain elasticity, and after excessive water for preparing steam is introduced into the water accumulation cavity 11, the water for preparing steam can press the waterproof air-permeable membrane 4 to deform, preventing the waterproof air-permeable membrane 4 from being broken due to excessive water for preparing steam being introduced into the water accumulation cavity 11.

[0047] Optionally, although the waterproof air-permeable membrane 4 has elasticity and can deform to a certain extent, but introducing excessive water for preparing steam into the water accumulation cavity 11 can cause the deformation of the waterproof air-permeable membrane 4 to be greater than the allowable deformation, so that the water for preparing steam breaks the waterproof air-permeable membrane 4 and flows into the steam cavity 12 and is discharged from the exhaust port 14. To solve the above technical problem, the housing 1 is provided with an observation window 5 on the side wall corresponding to the waterproof air-permeable membrane 4, so that the deformation of the waterproof air-permeable membrane 4 can be observed through the observation window 5. When the deformation of the waterproof air-permeable membrane 4 is found, the introduction of water for preparing steam into the water accumulation cavity 11 through the inlet port 13 is stopped in time to prevent the waterproof air-permeable membrane 4 from being broken.

[0048] Continue as Figures 1 to 2As shown, in the process of actually preparing steam by using the steam generating device, generally, pure water or other water without impurities is introduced into the water accumulation cavity 11 as water for preparing steam, so that the impurities in the water for preparing steam can be prevented from entering the petrochemical equipment using steam along with the steam, and the impurities can be prevented from damaging the petrochemical equipment, but the pure water is still relatively expensive. In order to further reduce the steam preparation cost of the steam generator, the steam generating device further comprises a filter screen 6, which is arranged in the shell 1 and located on the side of the waterproof and breathable membrane 4 facing the steam cavity 12, so that the water for preparing steam can also be selected from water other than pure water, such as sewage or hard water containing impurities. In this example, industrial sewage can be introduced into the water accumulation cavity 11, and the liquid petroleum product in the oil conveying pipe 21 of the oil conveying module 2 exchanges heat with the sewage to heat the sewage, so that the sewage boils to generate steam. Even if the generated steam contains a large amount of impurities and can pass through the waterproof and breathable membrane 4, the filter screen 6 can filter and adsorb the impurities contained in the steam, so that the steam discharged from the exhaust port 14 does not contain impurities, and the steam prepared by the steam generating device can meet the use requirements of the petrochemical equipment, and the quality of the steam prepared by the steam generating device is improved.

[0049] Although using sewage or hard water as water for preparing steam can reduce the steam preparation cost of the steam generating device, the impurities in the hard water or sewage can form scale and accumulate in the water accumulation cavity 11, which seriously affects the heat exchange efficiency between the liquid petroleum product in the oil conveying pipe 21 of the oil conveying module 2 and the water for preparing steam. In order to solve the above technical problems, the steam generating device continues to be as shown Figures 1 to 2 As shown, the shell 1 is further provided with a mounting and cleaning port 15, and a blocking member 7 is fixed at the mounting and cleaning port 15. Therefore, when a large amount of scale accumulates in the water accumulation cavity 11 and affects the normal steam preparation of the steam generating device, the blocking member 7 can be removed, and clean water can be introduced into the water accumulation cavity 11 through the mounting and cleaning port 15 to flush the water accumulation cavity 11. For the clean dead angle in the water accumulation cavity 11 which is difficult to be flushed, a cleaning tool can also be inserted into the water accumulation cavity 11 through the mounting and cleaning port 15 to clean the clean dead angle.

[0050] Optionally, the blocking member 7 can be connected with the mounting and cleaning port 15 by threaded connection, plug connection or the like. It should be noted that the blocking member 7 can be a blind flange, a sealing sleeve or any other blocking member capable of blocking, as long as the blocking member 7 can be removed to clean the scale and impurities in the water accumulation cavity 11 when the scale and impurities accumulate in the water accumulation cavity 11. Here, it will not be described one by one.

[0051] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.

Claims

1. A steam generating device, characterized by, The steam generating device comprises: a shell (1) in which a water accumulation cavity (11) and a steam cavity (12) are arranged in communication with each other, a side wall of the shell (1) is provided with an inflow port (13) communicating with the water accumulation cavity (11), and the side wall of the shell (1) is further provided with an exhaust port (14) communicating with the steam cavity (12); an oil conveying module (2) arranged in the water accumulation cavity (11), the oil conveying module (2) comprising an oil conveying pipe (21), an oil inlet pipe (22) and an oil outlet pipe (23), an inlet of the oil conveying pipe (21) communicating with an outlet of the oil inlet pipe (22), and an outlet of the oil conveying pipe (21) communicating with an inlet of the oil outlet pipe (23), and water for preparing steam in the water accumulation cavity (11) being capable of exchanging heat with the oil conveying pipe (21).

2. The steam generating device according to claim 1, characterized by The number of the oil conveying modules (2) is at least two, and the at least two oil conveying modules (2) are arranged in sequence along a height direction of the shell (1).

3. The steam generating device according to claim 2, wherein a heat insulation layer (3) is arranged between two adjacent oil conveying modules (2).

4. The steam generating device according to claim 1, wherein The oil conveying module (2) has N oil conveying pipes (21), the N oil conveying pipes (21) are arranged side by side, an outlet of an (N-1)th oil conveying pipe (21) communicating with an inlet of an Nth oil conveying pipe (21), and the volumes of the oil conveying modules (2) having different numbers of oil conveying pipes (21) are all the same.

5. The steam generating device according to claim 4, wherein A hydraulic sensor is arranged at the inlet of the oil conveying pipe (21); and / or A hydraulic sensor is arranged at the outlet of the oil conveying pipe (21).

6. The steam generating device of claim 1, wherein, The steam generating device further comprises a waterproof and breathable membrane (4) arranged in the shell (1) to separate the water accumulation cavity (11) and the steam cavity (12).

7. The steam generating device according to claim 6, wherein a viewing window (5) is arranged on a side wall of the shell (1) corresponding to the waterproof and breathable membrane (4).

8. The steam generating device according to claim 6, further comprising a filter screen (6) arranged in the shell (1) on a side of the waterproof and breathable membrane (4) facing the steam cavity (12).

9. The steam generating device of claim 1, wherein, The shell (1) is further provided with a mounting and cleaning port (15) in which a blocking piece (7) is fixed.

10. The steam generating device of claim 1, wherein, The oil conveying module (2) is detachably fixed to the side wall of the shell (1).

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