Pre-conversion reaction device for heavy hydrocarbon-containing raw material

Abstract

The utility model discloses a pre-conversion reaction device for heavy hydrocarbon-containing raw materials in the field of new energy and energy conservation, which comprises a reaction chamber inner shell, a reaction chamber outer shell and a heat exchange chamber outer shell, the reaction chamber outer shell is fixedly connected to an inner cavity of the reaction chamber inner shell, the heat exchange chamber outer shell is positioned at the bottom of the reaction chamber inner shell, and the reaction chamber outer shell is fixedly connected to the inner cavity of the heat exchange chamber outer shell. Sieve pore plates are arranged on the upper side and the lower side of an inner cavity of the reaction chamber inner shell, annular sieve trays are arranged between the upper side and the lower side of the outer side wall of the reaction chamber inner shell and the upper side and the lower side of the inner cavity wall of the reaction chamber outer shell, an upper side sealing head is arranged at the top of the reaction chamber outer shell, and an electric heating belt is fixedly connected to the outer side wall of the reaction chamber outer shell. The pre-conversion reaction device for the heavy hydrocarbon-containing raw material is reasonable in structural design, heat exchange can be carried out in the reaction device, energy recycling is realized, an environment-friendly effect is achieved, the temperature is controllable, heat is recycled, the loss is small, the size is small, the application range is not limited, and meanwhile, the pre-conversion reaction device is convenient to disassemble.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydrocarbon pretreatment device technical field, concretely is a kind of pre-reforming reaction device of heavy hydrocarbon-containing raw material. BACKGROUND

[0002] Hydrocarbon and steam pre-reforming process first carries out hydrocarbon cracking, steam reforming, and then carries out cracking product hydrogenation, carbon oxide methanation and other reactions, effectively converts heavy hydrocarbon components in hydrocarbon raw materials, such as the conversion of C2+ above hydrocarbons in oilfield associated gas or natural gas, and finally generates methane-rich gas.

[0003] The existing conversion process usually carries out heat exchange on process water outside the pre-reforming device, heats it to a certain temperature, and then mixes it with hydrocarbon raw materials to meet the inlet temperature requirement before being introduced into the pre-reforming reaction device. The pre-reforming reaction is an exothermic reaction or an endothermic reaction related to the heavy hydrocarbon content in the raw material. If the inlet temperature is fixed, the catalyst bed temperature in the pre-reforming reaction device cannot be controlled and cannot be accurately controlled. The catalyst activity is difficult to fully exert, which has a negative impact on the conversion of heavy hydrocarbons. In addition, the existing pre-reforming device has a large volume, high heat loss, limited applicable scenarios, and is not convenient to disassemble. Therefore, we propose a pre-reforming reaction device for heavy hydrocarbon-containing raw material. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a kind of pre-reforming reaction device of heavy hydrocarbon-containing raw material, to solve the problem of the reaction bed temperature in the above background that cannot be accurately controlled, the volume of conversion device is large, heat loss is much, system energy consumption is high, applicable scenario is limited, and it is not convenient to disassemble.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of pre-reforming reaction device of heavy hydrocarbon-containing raw material, including reaction chamber inner shell, reaction chamber outer shell and heat exchange chamber outer shell, the reaction chamber outer shell is fixedly connected in the inner chamber of the reaction chamber inner shell, the heat exchange chamber outer shell is located at the bottom of the reaction chamber inner shell, the inner chamber of the reaction chamber inner shell is equipped with sieve plate on the upper and lower sides, the outer lateral wall of the reaction chamber inner shell is equipped with annular sieve disc between the upper and lower sides of the inner cavity wall of the reaction chamber outer shell, the top of the reaction chamber outer shell is equipped with upper side head, the outer lateral wall of the reaction chamber outer shell is fixedly connected with electric heating band, the inner cavity of the heat exchange chamber outer shell is fixedly connected with sealing plate on the upper and lower sides, the inner lateral wall of the sealing plate is fixedly connected with finned tube, and the finned tube is uniformly distributed, the bottom of the heat exchange chamber outer shell is equipped with lower side head, the left lateral wall upper side of the heat exchange chamber outer shell is fixedly connected with heat exchange chamber connecting pipe, the left lateral wall lower side of the reaction chamber outer shell is fixedly connected with reaction chamber connecting pipe, and the heat exchange chamber connecting pipe and the reaction chamber connecting pipe are equipped with connecting flange between them.

[0006] Preferably, the lower side of the outer side wall of the reaction chamber outer shell is fixedly connected with a reaction chamber lower flange, the upper side of the outer side wall of the heat exchange chamber outer shell is fixedly connected with a heat exchange chamber upper flange, and the reaction chamber lower flange and the heat exchange chamber upper flange are fixedly connected through bolts.

[0007] Preferably, the lower side of the outer side wall of the heat exchange chamber outer shell is fixedly connected with a heat exchange chamber lower flange, the upper side of the outer side wall of the lower head is fixedly connected with a lower head flange, and the heat exchange chamber lower flange and the lower head flange are fixedly connected through bolts.

[0008] Preferably, the upper side of the outer side wall of the reaction chamber outer shell is fixedly connected with a reaction chamber upper flange, the lower side of the outer side wall of the upper head is fixedly connected with an upper head flange, and the reaction chamber upper flange and the upper head flange are fixedly connected through bolts.

[0009] Preferably, the top of the upper head is fixedly connected with an air inlet pipe in the middle, a thermocouple sleeve is fixedly connected to the right side of the top of the upper head, the thermocouple sleeve penetrates the upper head and extends to the upper part of the inner cavity of the reaction chamber outer shell, springs are fixedly connected to the top of the upper sieve plate on the left and right sides of the inner cavity of the upper head, and the bottom ends of the springs are fixedly connected to the top of the upper sieve plate.

[0010] Preferably, the lower side of the right side wall of the heat exchange chamber outer shell is fixedly connected with a water inlet pipe, and the bottom of the lower head is fixedly connected with an air outlet pipe.

[0011] Compared with the prior art, the pre-reforming reaction device has the advantages that process water enters the inside of the heat exchange chamber outer shell through the water inlet pipe and exchanges heat with high-temperature gas through the finned tube, the process water or water vapor after heat exchange flows through the annular channel formed by the reaction chamber outer shell and the reaction chamber inner shell, the high-temperature water vapor enters the cavity formed by the upper part of the reaction chamber outer shell and the upper head after the process water or water vapor is heated to a high-temperature state by the electric heating belt, and the high-temperature water vapor is mixed with heavy hydrocarbon raw material gas to reach the required reaction temperature and then enters the inside of the reaction chamber inner shell to react, so that the heavy hydrocarbon is converted into methane, the reaction temperature of the overall catalyst bed in the conversion device is indirectly controlled by the electric heating water vapor, the catalyst activity is kept in an optimal state, the methane-rich gas is cooled by heat exchange with the process water through the finned tube, and the cooled gas is discharged through the air outlet pipe, so that heat exchange can be carried out in the reaction device, energy recycling is realized, the environmental protection effect is achieved, the temperature is controllable, heat recycling is realized, the loss is small, the volume is small, the application range is not limited, and the device is convenient to disassemble. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 A whole structure schematic view of a pre-reforming reaction device of heavy hydrocarbon-containing raw material is provided in the utility model;

[0013] Figure 2 A main view sectional structure schematic view of a pre-reforming reaction device of heavy hydrocarbon-containing raw material is provided in the utility model;

[0014] Figure 3 A partial three-dimensional sectional structure schematic view of a pre-reforming reaction device of heavy hydrocarbon-containing raw material is provided in the utility model;

[0015] Figure 4 A partial three-dimensional sectional structure schematic view of a pre-reforming reaction device of heavy hydrocarbon-containing raw material is provided in the utility model;

[0016] Figure 5 A partial three-dimensional sectional structure schematic view of a pre-reforming reaction device of heavy hydrocarbon-containing raw material is provided in the utility model;

[0017] Figure 6 A partial three-dimensional sectional structure schematic view of a pre-reforming reaction device of heavy hydrocarbon-containing raw material is provided in the utility model. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0019] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, 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, and therefore cannot be understood as a limitation on the utility model. In addition, the features limited as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0020] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can pass through intermediate medium indirectly connect, can be two element internal communication. For ordinary skilled person in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to specific circumstances.

[0021] As Figures 1-6 Indicated, the utility model provides a kind of pre-reforming reaction device of heavy hydrocarbon-containing raw material, heat exchange is carried out, energy recycling is realized, environmental protection effect is reached, and temperature is controllable, heat recycling is used, loss is small, small in size, applicable scope is not limited, simultaneously convenient to disassemble, including reaction chamber inner casing 1, reaction chamber outer casing 2 and heat exchange chamber outer casing 3;

[0022] Please refer to Figures 1-2 Reaction chamber outer casing 2 is fixedly connected in the inner chamber of reaction chamber inner casing 1, heat exchange chamber outer casing 3 is located at the bottom of reaction chamber inner casing 1, the inner chamber of reaction chamber inner casing 1 is equipped with sieve plate 4 on both sides, annular sieve disc 5 is equipped between the outer side wall of reaction chamber inner casing 1 and the inner chamber wall of reaction chamber outer casing 2 on both sides, the top of reaction chamber outer casing 2 is equipped with upper head 6, the outer side wall of reaction chamber outer casing 2 is fixedly connected with electric heating band 11, the inner chamber of heat exchange chamber outer casing 3 is fixedly connected with sealing plate 24 on both sides, the inner side wall of sealing plate 24 is fixedly connected with finned tube 13, and finned tube 13 is evenly distributed, the bottom of heat exchange chamber outer casing 3 is equipped with lower head 17, the left side wall of heat exchange chamber outer casing 3 is fixedly connected with heat exchange chamber connecting pipe 20 on the top, the left side wall of reaction chamber outer casing 2 is fixedly connected with reaction chamber connecting pipe 21 on the bottom, connecting flange 22 is equipped between heat exchange chamber connecting pipe 20 and reaction chamber connecting pipe 21, process water enters into the inside of heat exchange chamber outer casing 3 through water inlet pipe 14, and high-temperature methane-rich gas is exchanged with finned tube 13, process water or water vapor after heat exchange flows through the annular passage formed by reaction chamber outer casing 2 and reaction chamber inner casing 1, after process water or water vapor is heated to high-temperature state by electric heating band 11, high-temperature water vapor enters the cavity formed by the upper portion of reaction chamber outer casing 2 and upper head 6, while adding heavy hydrocarbon-containing raw material gas and high-temperature water vapor to mix, after reaching the temperature required for reaction, enter the inside of reaction chamber inner casing 1 to react, convert heavy hydrocarbon into methane and obtain methane-rich gas, finally, methane-rich gas is exchanged with process water by finned tube 13, and is discharged by gas outlet pipe 18 after cooling.

[0023] In summary, heat exchange can be carried out inside the reaction device, energy recycling is realized, environmental protection effect is achieved, temperature is controllable, heat recycling is realized, loss is small, volume is small, application range is not limited, and the reaction device is convenient to disassemble.

[0024] Please refer again to Figures 1-6 , the lower side of the outer side wall of the reaction chamber inner shell 1 is fixedly connected with a reaction chamber lower flange 12, the upper side of the outer side wall of the heat exchange chamber outer shell 3 is fixedly connected with a heat exchange chamber upper flange 15, the reaction chamber lower flange 12 and the heat exchange chamber upper flange 15 are fixedly connected by bolts, and the heat exchange chamber outer shell 3 and the reaction chamber inner shell 1 can be quickly disassembled and installed through the reaction chamber lower flange 12 and the heat exchange chamber upper flange 15.

[0025] Please refer again to Figures 1-6 , the lower side of the outer side wall of the heat exchange chamber outer shell 3 is fixedly connected with a heat exchange chamber lower flange 16, the upper side of the outer side wall of the lower head 17 is fixedly connected with a lower head flange 19, the heat exchange chamber lower flange 16 and the lower head flange 19 are fixedly connected by bolts, and the heat exchange chamber outer shell 3 and the lower head 17 can be quickly disassembled and installed through the heat exchange chamber lower flange 16 and the lower head flange 19.

[0026] Please refer again to Figures 1-6 , the upper side of the outer side wall of the reaction chamber outer shell 2 is fixedly connected with a reaction chamber upper flange 23, the lower side of the outer side wall of the upper head 6 is fixedly connected with an upper head flange 10, the reaction chamber upper flange 23 and the upper head flange 10 are fixedly connected by bolts, and the reaction chamber outer shell 2 and the upper head 6 can be quickly disassembled and installed through the reaction chamber upper flange 23 and the upper head flange 10.

[0027] Please refer again to Figures 1-6 , the top of the upper head 6 is fixedly connected with an air inlet pipe 7, the right side of the top of the upper head 6 is fixedly connected with a thermocouple sleeve 8, the thermocouple sleeve 8 penetrates through the upper head 6 and extends to the upper part of the inner cavity of the reaction chamber outer shell 2, and the top of the inner cavity of the upper head 6 is fixedly connected with springs 9 on the left and right sides, the bottom ends of the springs 9 are fixedly connected to the top of the upper sieve plate 4, and the reaction device can be filled with heavy hydrocarbon raw materials such as oilfield associated gas or natural gas through the air inlet pipe 7.

[0028] Please refer again to Figures 1-6 , the lower side of the right side wall of the heat exchange chamber outer shell 3 is fixedly connected with a water inlet pipe 14, and the bottom of the lower head 17 is fixedly connected with an air outlet pipe 18, the heat exchange chamber outer shell 3 can be filled with process water through the water inlet pipe 14, and the air outlet pipe 18 is used for the rich methane gas to exchange heat with the process water through the finned tube 13 and then be discharged by the air outlet pipe 18 after cooling.

[0029] In the specific use, the person skilled in the art can add process water to the heat exchange chamber outer shell 3 through the water inlet pipe 14 when using the conversion reaction device to process the heavy hydrocarbon-containing raw material, the high-temperature methane-rich gas of the finned tube 13 exchanges heat with the process water, and the heat-exchanged process water or water vapor enters the reaction chamber outer shell 2 through the heat exchange chamber connecting pipe 20 and the reaction chamber connecting pipe 21. The process water or water vapor flows through the annular channel formed by the reaction chamber outer shell 2 and the reaction chamber inner shell 1, flows upward through the lower annular sieve tray 5, then passes through the upper annular sieve tray 5, and at the same time, the process water or water vapor is heated to a high-temperature state by the electric heating belt 11. The high-temperature water vapor enters the cavity formed by the upper portion of the reaction chamber outer shell 2 and the upper head 6, and at the same time, the heavy hydrocarbon-containing raw material gas is added to mix with the high-temperature water vapor to reach the required reaction temperature. After passing through the upper sieve plate 4, the reaction chamber inner shell 1 is entered to react, the heavy hydrocarbon is converted into methane, and then the lower sieve plate 4 is passed through. Finally, the methane-rich gas is exchanged with the process water through the finned tube 13, cooled, and discharged through the gas outlet pipe 18.

[0030] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A pre-reforming unit for a heavy hydrocarbon containing feedstock, characterized by: The utility model provides a heat exchange room and reaction chamber, including reaction chamber inner casing (1), reaction chamber outer casing (2) and heat exchange room outer casing (3), reaction chamber outer casing (2) is fixedly connected in the inner chamber of reaction chamber inner casing (1), heat exchange room outer casing (3) is located the bottom of reaction chamber inner casing (1), the inner chamber of reaction chamber inner casing (1) is equipped with sieve plate (4) on both sides, and the inner chamber wall of reaction chamber outer casing (2) is equipped with annular sieve disc (5) between both sides, the top of reaction chamber outer casing (2) is equipped with upper side head (6), and the outer lateral wall of reaction chamber outer casing (2) is fixedly connected with electric heating band (11), the inner chamber of heat exchange room outer casing (3) is fixedly connected with sealing plate (24) on both sides, the inner lateral wall of sealing plate (24) is fixedly connected with finned tube (13), and the finned tube (13) is evenly distributed, and the bottom of heat exchange room outer casing (3) is equipped with lower side head (17), and the left lateral wall of heat exchange room outer casing (3) is fixedly connected with heat exchange room connecting pipe (20) on the upside, and the left lateral wall of reaction chamber outer casing (2) is fixedly connected with reaction chamber connecting pipe (21) on the downside, and the heat exchange room connecting pipe (20) and reaction chamber connecting pipe (21) are equipped with connecting flange (22) between them.

2. A pre-reforming apparatus for a heavy hydrocarbon containing feedstock according to claim 1, characterized in that: The outer lateral wall of reaction chamber inner casing (1) is fixedly connected with reaction chamber lower flange (12) on the downside, and the outer lateral wall of heat exchange room outer casing (3) is fixedly connected with heat exchange room upper flange (15) on the upside, and reaction chamber lower flange (12) and heat exchange room upper flange (15) are fixedly connected by bolt.

3. A pre-reforming apparatus for a heavy hydrocarbon containing feedstock according to claim 1, characterized in that: The outer lateral wall of heat exchange room outer casing (3) is fixedly connected with heat exchange room lower flange (16) on the downside, and the outer lateral wall of lower side head (17) is fixedly connected with lower head flange (19) on the upside, and heat exchange room lower flange (16) and lower head flange (19) are fixedly connected by bolt.

4. A pre-reforming apparatus for a heavy hydrocarbon containing feedstock according to claim 1, characterized in that: The outer lateral wall of reaction chamber outer casing (2) is fixedly connected with reaction chamber upper flange (23) on the upside, and the outer lateral wall of upper side head (6) is fixedly connected with upper head flange (10) on the downside, and reaction chamber upper flange (23) and upper head flange (10) are fixedly connected by bolt.

5. A pre-reforming apparatus for a heavy hydrocarbon containing feedstock according to claim 1, characterized in that: The top of upper side head (6) is fixedly connected with air inlet pipe (7) in the middle, and the top of upper side head (6) is fixedly connected with thermocouple sleeve (8) in the middle of right side, and thermocouple sleeve (8) penetrates upper side head (6) and extends to the inner chamber of reaction chamber outer casing (2) on the upside, and the inner chamber of upper side head (6) is fixedly connected with spring (9) on both sides on the top, and the bottom of spring (9) is fixedly connected in the top of upper side sieve plate (4).

6. A pre-reforming apparatus for a heavy hydrocarbon containing feedstock according to claim 1, characterized in that: The right lateral wall of heat exchange room outer casing (3) is fixedly connected with water inlet pipe (14) on the downside, and the bottom of lower side head (17) is fixedly connected with air outlet pipe (18) in the middle.

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