Maleic anhydride preparation system with steam-electricity double-drive unit

Abstract

The maleic anhydride preparation system comprises a reaction kettle, the reaction kettle is connected with a heat exchanger, the heat exchanger is connected with a steam input mechanism, one end of the steam input mechanism is provided with a steam turbine, the bottom of the steam turbine is provided with a bottom plate, one end of the steam turbine is provided with the steam input mechanism, and the other end of the steam turbine is provided with the steam output mechanism. The steam input mechanism is connected with the steam turbine and the reaction kettle, the other end of the steam turbine is provided with a self-synchronizing clutch, one end of the self-synchronizing clutch is provided with a permanent magnet synchronous motor, one end of the permanent magnet synchronous motor is provided with a compressor, and the other end of the permanent magnet synchronous motor is provided with a compressor. The device solves the problems that heat released in the maleic anhydride preparation process is very high, the heat is usually ignored in an existing maleic anhydride preparation process, and the maleic anhydride preparation process needs to be cooled, and the effect that the heat generated in the maleic anhydride preparation process can be utilized through the steam turbine is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of steam-electric dual drive, and more specifically, to a maleic anhydride preparation system with a steam-electric dual drive unit. Background Art

[0002] Maleic anhydride is usually prepared by catalytic oxidation in the gas phase with n-butane as the raw material under the action of a catalyst with V2O5 as the main active component. This method has been rapidly developed because n-butane is cheap, low in toxicity and environmentally friendly, and the production equipment is basically the same as the benzene method, only the catalyst needs to be replaced.

[0003] At present, in the maleic anhydride preparation system on the market, n-butane is used as the raw material. Under the action of a catalyst, pressurized air undergoes a gas-phase oxidation reaction to produce maleic anhydride, and the heat generated during the maleic anhydride preparation process is discharged.

[0004] However, the heat released during the preparation of maleic anhydride is very high. The reaction of n-butane with oxygen is a highly exothermic reaction. This heat is usually ignored in the existing maleic anhydride preparation process, and if the heat is not transferred, it needs to be cooled, which will cause a waste of resources. Summary of the invention

[0005] In view of the shortcomings of the prior art, the object of the present invention is to provide a maleic anhydride preparation system with a steam-electric dual-drive unit.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A maleic anhydride preparation system with a steam-electric dual-drive unit comprises a reactor, the reactor is respectively connected to a compressor and an n-butane storage tank, a molten salt is arranged on the outside of the reactor, a heat exchanger is connected to the outside of the reactor, the outlet of the heat exchanger is connected back to the heat exchanger, the output port of the heat exchanger is connected to a water vapor intermediate storage tank, the output port of the water vapor intermediate storage tank is connected to a steam input mechanism, a steam turbine is arranged at one end of the steam input mechanism, a bottom plate is installed at the bottom of the steam turbine, a steam input mechanism is arranged at one end of the steam turbine, the steam input mechanism is connected to the steam turbine and the reactor, and a self- A synchronous clutch, a permanent magnet synchronous motor is arranged at one end of the self-synchronous clutch, the compressor is arranged at one end of the permanent magnet synchronous motor, the compressor inputs compressed air into the reactor to produce maleic anhydride, a steam input mechanism, the steam input mechanism includes a load steam input pipe, the load steam input pipe includes a load input pipe body, a scraper assembly is arranged inside the load input pipe body, the scraper assembly includes a first scraper mounting wheel and a second scraper mounting wheel, a scraper shaft is rotatably installed between the first scraper mounting wheel and the second scraper mounting wheel, a scraper shaft is sleeved with a scraper column, and a curved scraper is arranged in a circular array on the scraper column.

[0008] The present invention is further configured as follows: the steam turbine includes two support plates, the two support plates are fixed to the bottom plate, a steam turbine body is installed above the two support plates, a steam input port is provided at one end of the steam turbine body, a power output port is provided at the other end of the steam turbine body, and the steam input port is connected to the steam input mechanism.

[0009] The present invention is further configured as follows: the self-synchronizing clutch includes a synchronization input end, the synchronization input end is mounted on the base plate, a clutch body is provided on one side of the synchronization input end, a synchronization output end is provided on the other side of the synchronization input end, and the clutch body is fixedly connected to the power output port.

[0010] The present invention is further configured as follows: the permanent magnet synchronous motor comprises a synchronous motor body, one end of the synchronous motor body is provided with a synchronous motor input end, the other end of the synchronous motor body is provided with a synchronous motor output end, and the synchronous motor input end is fixedly connected to the self-synchronizing clutch.

[0011] The present invention is further configured as follows: the compressor comprises a compressor body, one end of the compressor body is provided with a compressor input end, the compressor input end is fixedly connected to the synchronous motor output end, and the compressor body is mounted on the base plate.

[0012] The present invention is further configured as follows: the steam input mechanism also includes a steam input pipe, one end of the steam input pipe is connected to the compressor, the other end of the steam input pipe is equipped with a steam connecting pipe, one end of the steam connecting pipe is equipped with a first steam valve, and one axial end of the first steam valve is equipped with a compensating steam input pipe.

[0013] The present invention is further configured as follows: a valve connecting pipe is installed at the other axial end of the first steam valve, a second steam valve assembly is installed at the other end of the valve connecting pipe, the second steam valve assembly includes a second valve body, and a first connecting port is installed below the second valve body.

[0014] The present invention is further configured as follows: a second connection port is installed at one axial end of the second valve body, a third connection port is installed at the other axial end of the second valve body, and an electromagnetic controller is installed above the second valve body.

[0015] The present invention is further configured as follows: the third connecting port is connected to the valve connecting pipe, a discharge pipe is installed on the first connecting port, and a load steam input pipe is installed on the second connecting port.

[0016] The present invention is further configured as follows: the structure of the first steam valve is the same as the structure of the second steam valve assembly, and the scraper assembly is installed on a side of the third connecting port close to the load input pipe body.

[0017] By adopting the above technical solution, a curved scraper is arranged to drive the scraper column to rotate. When the curved scraper rotates, the salt scale near the load input pipe body and the curved scraper is scraped off, thereby achieving the effect of scraping off the salt scale near the pipeline of the second steam valve assembly and shielding impurities, thereby preventing salt scale from accumulating near the valve and impurities from adhering to the pipe wall.

[0018] By adopting the above technical scheme, a synchronous motor body is arranged to drive the synchronous motor output end to rotate, and the compressor input end is driven to rotate. The compressor body inputs compressed air into the reactor. The compressed air reacts with n-butane through the catalyst, and the reactor generates heat. The heat passes through the heat exchanger to heat water to form steam. The steam passes through the load steam input pipe to drive the turbine body to work. When the speed of the power output port reaches the engagement speed, the clutch body engages, and the turbine body rotates coaxially with the synchronous motor body to synchronously drive the compressor, thereby achieving the effect of utilizing the heat generated in the preparation process of maleic anhydride through the steam turbine.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] 1. The synchronous motor body is set to drive the synchronous motor output end to rotate, and the compressor input end is driven to rotate. The compressor body inputs compressed air into the reactor. The compressed air reacts with n-butane through the catalyst. The reactor generates heat and transfers it to the molten salt. The molten salt passes through the heat exchanger to heat water to form steam. The steam passes through the load steam input pipe to drive the turbine body to work. When the power output port speed reaches the engagement speed, the clutch body engages, the turbine body and the synchronous motor body rotate coaxially, and the compressor is driven synchronously, so that the heat generated in the preparation process of maleic anhydride can be utilized through the turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The figure is a process flow chart of the production of maleic anhydride according to the present invention.

[0022] Figure 2 It is a schematic diagram of the overall structure of a maleic anhydride preparation system with a steam-electric dual-drive unit in the present invention;

[0023] Figure 3 for Figure 2 A structural schematic diagram of a maleic anhydride preparation system with a steam-electric dual-drive unit from another perspective is shown;

[0024] Figure 4 for Figure 2 The explosion structure schematic diagram of a maleic anhydride preparation system with a steam-electric dual-drive unit is shown;

[0025] Figure 5 It is a schematic diagram of the matching structure of the steam turbine and the steam input mechanism in the present invention;

[0026] Figure 6 It is a schematic diagram of the overall structure of the steam input mechanism in the present invention;

[0027] Figure 7 for Figure 6 The overall structural schematic diagram of the second steam valve assembly is shown;

[0028] Figure 8 for Figure 6 The overall structural diagram of the load steam input pipe is shown;

[0029] Fig. 9 for Figure 6 A schematic diagram of the matching structure of the third connecting port and the load steam input pipe is shown;

[0030] Fig.10 for Fig. 9 The overall structural diagram of the load steam input pipe from another perspective is shown;

[0031] Fig.11 for Fig.10 Schematic diagram of the cross-section structure along the AA direction;

[0032] Fig.12 for Fig.11 Schematic diagram of the overall structure of the middle scraper assembly.

[0033] Description of reference numerals: 1. bottom plate;

[0034] 2. Steam turbine; 21. Support plate; 22. Steam turbine body; 23. Steam input port; 24. Power output port;

[0035] 3. Self-synchronizing clutch; 31. Synchronizing input terminal; 32. Clutch body; 33. Synchronizing output terminal;

[0036] 4. Permanent magnet synchronous motor; 41. Synchronous motor body; 42. Synchronous motor input terminal; 43. Synchronous motor output terminal;

[0037] 5. compressor; 51. compressor body; 52. compressor input end;

[0038] 6. Steam input mechanism; 61. Steam input pipe; 62. Steam connecting pipe; 63. First steam valve; 64. Valve connecting pipe; 65. Second steam valve assembly; 651. Solenoid controller; 652. Second valve body; 653. First connection port; 654. Second connection port; 655. Third connection port; 66. Discharge pipe; 67. Load steam input pipe; 671. Load input pipe body; 672. Scraper assembly; 6721. First scraper mounting wheel; 6722. Second scraper mounting wheel; 6723. Scraper rotating shaft; 6724. Scraper column; 6725. Curved scraper; 68. Compensation steam input pipe;

[0039] A1, reactor; A2, n-butane storage tank; A3, molten salt; A4, heat exchanger; A5, water vapor intermediate storage tank. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0042] See also Figure 1 and Figure 2The maleic anhydride production system of the present invention comprises a reactor A1, wherein the reactor A1 is respectively connected to a compressor 5 and a normal butane storage tank A2, a molten salt A3 is arranged on the outside of the reactor A1, a heat exchanger A4 is connected to the outside of the reactor A1, an outlet of the heat exchanger A4 is connected back to the heat exchanger A4, an output port of the heat exchanger A4 is connected to a water vapor intermediate storage tank A5, an output port of the water vapor intermediate storage tank A5 is connected to a steam input mechanism 6, a steam turbine 2 is arranged at one end of the steam input mechanism 6, a bottom plate 1 is installed at the bottom of the steam turbine 2, a steam input mechanism 6 is arranged at one end of the steam turbine 2, the steam input mechanism 6 connects the steam turbine 2 and the reactor A1, a self-synchronizing clutch 3 is arranged at the other end of the steam turbine 2, a permanent magnet synchronous motor 4 is arranged at one end of the self-synchronizing clutch 3, the compressor 5 is arranged at one end of the permanent magnet synchronous motor 4, and the compressor 5 inputs compressed air into the A1 reactor to produce maleic anhydride.

[0043] The n-butane storage tank A2 continuously adds n-butane into A1. The A1 reactor is used to heat the n-butane, catalyst and compressed air to react, and maleic anhydride is generated after the reaction. The heat generated in the process of preparing maleic anhydride is absorbed by the molten salt A3. The molten salt A3 passes through the heat exchanger A4. The molten salt A3 with the heat consumed returns to the outer layer of the A1 reactor through the lifting pump to absorb heat. The heat exchanger A4 heats the water to form high-temperature steam. The high-temperature steam enters the water vapor intermediate storage tank A5. When the switch is turned on, the water vapor intermediate storage tank A5 inputs the high-temperature steam into the steam input mechanism 6.

[0044] See also Figure 2-12 , the present invention provides the following technical solutions:

[0045] The bottom plate 1 is used for fixed installation, the steam turbine 2 is used for secondary utilization of the steam generated in the heat exchanger A3, the steam input mechanism 6 is used for conveying the steam to the steam turbine 2, the self-synchronizing clutch 3 is used for connecting the steam turbine 2 and the permanent magnet synchronous motor 4, linking the steam turbine 2 and the permanent magnet synchronous motor 4, the compressor 5 is used for compressing air, and conveying the compressed air into the A1 reactor, and the compressed air undergoes a gas phase oxidation reaction.

[0046] See also Figure 4 The steam turbine 2 includes two support plates 21, which are fixed on the base plate 1. A steam turbine body 22 is installed above the two support plates 21. A steam input port 23 is provided at one end of the steam turbine body 22, and a power output port 24 is provided at the other end of the steam turbine body 22. The steam input port 23 is connected to the steam input mechanism 6.

[0047] The two support plates 21 provide stable support for the turbine body 22 and limit the installation position of the turbine body 22 on the base plate 1. The steam input port 23 is used to send steam into the turbine body 22 for conversion, and the power output port 24 is used to transmit the mechanical force converted by the turbine body 22 to the self-synchronizing clutch 3.

[0048] The self-synchronizing clutch 3 includes a synchronization input terminal 31 , which is mounted on the base plate 1 , a clutch body 32 is disposed on one side of the synchronization input terminal 31 , and a synchronization output terminal 33 is disposed on the other side of the synchronization input terminal 31 , and the clutch body 32 is fixedly connected to the power output port 24 .

[0049] The synchronous input terminal 31 is used to receive the mechanical transmission force output by the power output port 24. The clutch body 32 is used to automatically engage when the rotation speed of the turbine body 22 exceeds the rotation speed of the permanent magnet synchronous motor 4. The power output port 24 and the synchronous input terminal 31 are connected as a whole by the shaft system; when the rotation speed of the turbine body 22 is lower than the rotation speed of the permanent magnet synchronous motor 4, the clutch body 32 is disengaged, the power output port 24 and the synchronous input terminal 31 are withdrawn from the shaft system connection, and the synchronous output terminal 33 is used to connect the permanent magnet synchronous motor 4.

[0050] The permanent magnet synchronous motor 4 includes a synchronous motor body 41 , one end of which is provided with a synchronous motor input terminal 42 , the other end of which is provided with a synchronous motor output terminal 43 , and the synchronous motor input terminal 42 is fixedly connected to the self-synchronizing clutch 3 .

[0051] The synchronous motor body 41 is used to directly start the compressor 5, and the synchronous motor input terminal 42 is used to connect the synchronous output terminal 33. When the synchronous motor input terminal 42 is connected to the synchronous output terminal 33, the two can rotate synchronously. The synchronous motor body 41 is used to output driving force to drive the synchronous motor output terminal 43 to rotate.

[0052] The compressor 5 includes a compressor body 51 . A compressor input terminal 52 is disposed at one end of the compressor body 51 . The compressor input terminal 52 is fixedly connected to the synchronous motor output terminal 43 . The compressor body 51 is mounted on the base plate 1 .

[0053] The compressor body 51 is used to compress air and input the compressed air into the A1 reactor. The compressor input end 52 is used to drive the compressor body 51 to work. The steam turbine 2, the self-synchronizing clutch 3, the permanent magnet synchronous motor 4 and the compressor 5 are coaxially mounted on the base plate 1.

[0054] The steam generated during the heat exchange process will contain impurities, such as sodium salt, silicon salt, etc. These impurities may be deposited inside the pipe and enter the steam turbine 2, resulting in a decrease in the output and efficiency of the steam turbine 2. Some impurities accumulate on the inner wall of the pipe to produce salt scale, which makes the temperature of the part covered by the salt scale lower than that of other uncovered parts, forming a temperature difference, accelerating the tensile strain of the steel, and even causing cracks and fractures in severe cases. When impurities or salt scale adhere to the vicinity of the valve, the accumulated salt scale or impurities will suddenly fall off, making it difficult to open the valve and not close it tightly, which will cause serious safety accidents in the steam turbine.

[0055] See also Figures 6 to 12 The steam input mechanism 6 includes a steam input pipe 61, one end of which is connected to the water vapor intermediate storage tank A5, and the other end of the steam input pipe 61 is equipped with a steam connecting pipe 62, one end of the steam connecting pipe 62 is equipped with a first steam valve 63, and one axial end of the first steam valve 63 is equipped with a compensating steam input pipe 68.

[0056] The steam input pipe 61 inputs steam into the steam input port 23 as the power of the turbine body 22. The steam connecting pipe 62 sends steam into the steam input pipe 61. The first steam valve 63 controls the stop or flow of steam generated by the compensation steam and water vapor intermediate storage tank A5. The compensation steam input pipe 68 inputs maleic anhydride steam into the first steam valve 63. When the first steam valve 63 is opened close to the side of the compensation steam input pipe 68, the compensation steam enters the steam connecting pipe 62.

[0057] The second steam valve assembly 65 detects the steam pressure value at a position close to the second interface 654. If it does not meet the standard, it will not be delivered. Delivering steam with substandard pressure to the steam turbine will cause the enthalpy drop of the entire turbine unit to decrease, the economic efficiency of operation to decrease, and the axial thrust of the steam turbine to increase. The electromagnetic controller 651 opens the channel between the second connection port 654 and the first connection port 653, and discharges the steam with substandard pressure through the first connection port 653.

[0058] When the steam pressure reaches 2.5MPa~6.4MPa, the electromagnetic controller 651 opens the channel between the second connection port 654 and the third connection port 655, the first steam valve 63 close to the end of the valve connecting pipe 64 opens, the steam enters the steam connecting pipe 62, and the turbine 2 rotates.

[0059] The steam generated by the steam compensation equipment is input from the compensation steam input pipe 68, the first steam valve 63 is opened at one end close to the compensation steam input pipe 68, and the compensation steam is input into the first steam valve 63. The second steam valve assembly 65 detects the steam pressure entering the steam connecting pipe 62 to obtain the steam pressure value. The rated steam pressure value is subtracted from the actual steam pressure value to obtain the compensation steam pressure value. The first steam valve 63 is controlled to input the compensation steam. The compensation steam pressure is the same as the compensation steam pressure value.

[0060] By providing the first steam valve 63 and the second steam valve assembly 65, the first steam valve 63 and the second steam valve assembly 65 can cooperate with each other to compensate for the input steam size.

[0061] A valve connecting pipe 64 is installed at the other axial end of the first steam valve 63, and a second steam valve assembly 65 is installed at the other end of the valve connecting pipe 64. The second steam valve assembly 65 includes a second valve body 652, a first connecting port 653 is installed below the second valve body 652, a second connecting port 654 is installed at one axial end of the second valve body 652, a third connecting port 655 is installed at the other axial end of the second valve body 652, and an electromagnetic controller 651 is installed above the second valve body 652.

[0062] The third connection port 655 is connected to the valve connection pipe 64 , a discharge pipe 66 is installed on the first connection port 653 , and a load steam input pipe 67 is installed on the second connection port 654 .

[0063] The structure of the first steam valve 63 is the same as that of the second steam valve assembly 65 . The scraper assembly 672 is installed on a side of the third connection port 655 close to the load input pipe body 671 .

[0064] The valve connecting pipe 64 connects the first steam valve 63 and the second steam valve assembly 65. The second steam valve assembly 65 is used to control the stop or flow of steam generated by the water vapor intermediate storage tank A5. The second valve body 652 controls the stop or flow of steam through the electromagnetic controller 651. The electromagnetic controller 651 is used to receive control signals and output control instructions. The first connecting port 653 excludes steam with more impurities. Before the pipeline enters formal operation, the impurities deposited in the pipeline are first cleared with steam. The second connecting port 654 is connected to the load steam input pipe 67, and the steam is input from the second connecting port 654. The third connecting port 655 inputs the steam processed by the scraper assembly 672 into the valve connecting pipe 64.

[0065] The first connection port 653 discharges steam containing more impurities, and the discharge pipe 66 is connected to the first connection port 653 .

[0066] By arranging the first steam valve 63 and the second steam valve assembly 65 to be connected, the effect of being able to process the compensating steam and the steam prepared by maleic anhydride at the same time is achieved.

[0067] The steam input mechanism 6 also includes a load steam input pipe 67, which includes a load input pipe body 671. A scraper assembly 672 is arranged inside the load input pipe body 671. The scraper assembly 672 includes a first scraper mounting wheel 6721 and a second scraper mounting wheel 6722. A scraper shaft 6723 is rotatably installed between the first scraper mounting wheel 6721 and the second scraper mounting wheel 6722. A scraper shaft 6723 is sleeved with a scraper column 6724, and a curved scraper 6725 is arranged in a circular array on the scraper column 6724.

[0068] The load steam input pipe 67 is used to input the steam generated by the water vapor intermediate storage tank A5, and can process the input steam. The load input pipe body 671 guides the input direction of the steam, and the scraper assembly 672 processes the salt scale on the load input pipe body 671. When the steam is input into the load input pipe body 671, since the steam contains impurities, such as sodium salt, silicon salt, etc., these impurities may be deposited inside the steam turbine 2. If the accumulated impurities fall on the pipe wall, it will cause the valve assembly of the second steam valve assembly 65 to be difficult to close, resulting in the problem of difficult opening of the valve and loose closing, which will lead to a decrease in the output and efficiency of the steam turbine 2, and even cause the unit to fail to work normally. In addition, the steam with impurities accumulates on the load input pipe body 671, which will produce salt scale, increase the pipe wall temperature, and increase The tensile strain of the steel material may be increased quickly, and cracks may even be generated in severe cases. The first scraper mounting wheel 6721 is installed on the side of the third connection port 655 close to the load input pipe body 671. When steam enters the load input pipe body 671, the steam will apply pneumatic pressure along the shape of the curved scraper 6725. After the pneumatic pressure is applied, the scraper column 6724 can be driven to rotate, and the scraper shaft 6723 can be driven to rotate synchronously. When the curved scraper 6725 rotates, the part of the curved scraper 6725 close to the load input pipe body 671 can scrape off the salt scale near the second connection port 654 to prevent the salt scale from accumulating on the pipe wall, and before passing through the second connection port 654, the second scraper mounting wheel 6722 can block some impurities to prevent excessive impurities from entering the second steam valve assembly 65.

[0069] The curved scraper 6725 is provided to drive the scraper column 6724 to rotate. When the curved scraper 6725 rotates, the salt scale near the load input pipe body 671 and the curved scraper 6725 is scraped off to avoid accumulation on the pipe wall, thereby achieving the effect of scraping off the salt scale near the pipeline of the second steam valve assembly 65 and shielding impurities, thereby avoiding the accumulation of salt scale near the valve and the attachment of impurities to the pipe wall.

[0070] When the synchronous motor body 41 is working, it drives the synchronous motor output end 43 to rotate, and the synchronous motor output end 43 drives the compressor input end 52 to rotate, and the compressor body 51 is working. The compressor body 51 inputs compressed air into the A1 reactor. The compressed air reacts with n-butane through the catalyst, and the A1 reactor generates heat. The heat is absorbed by the molten salt. The molten salt passes through the heat exchanger A3 and transfers the heat to water. After heating the water, steam is formed. The steam enters the water vapor intermediate storage tank A5. The steam passes through the load steam input pipe 67. If the initial steam drives the original air in the pipeline to flow when passing through the pipeline, the steam may contain more impurities at this time. The electromagnetic controller 651 opens the channel between the second connecting port 654 and the first connecting port 653, and discharges the steam with more impurities through the first connecting port 653. If the impurities contained are within the standard range, the standard range (the sodium salt content is below 10μg / kg), the electromagnetic controller 651 opens the channel between the second interface 654 and the third connection port 655, and the first steam valve 63 is opened near one end of the valve connecting pipe 64, and steam enters the steam connecting pipe 62, driving the turbine body 22 to work. When the speed of the power output port 24 reaches the engagement speed, the clutch body 32 engages, and the turbine body 22 rotates coaxially with the synchronous motor body 41 to synchronously drive the compressor 5. If the steam input amount does not meet the standard, the compensation steam engine works, and the steam generated by the compensation steam engine is input from the compensation steam input pipe 68. The first steam valve 63 is opened near one end of the compensation steam input pipe 68 to compensate the steam, so that the turbine body 22 can work stably and continuously. The specific structure of the maleic anhydride machine is a conventional technical means well known to those skilled in the art, and the present invention will not be explained in detail here.

[0071] By setting a synchronous motor body 41 to drive the synchronous motor output end 43 to rotate, the compressor input end 52 is driven to rotate the compressor body 51 to input compressed air into the A1 reactor. The compressed air reacts with n-butane through the catalyst, and the A1 reactor generates heat. The heat passes through the heat exchanger A3 to heat water to form steam. The steam enters the water vapor intermediate storage tank A5. The steam passes through the load steam input pipe 67 to drive the turbine body 22 to work. When the speed of the power output port 24 reaches the engagement speed, the clutch body 32 engages, and the turbine body 22 rotates coaxially with the synchronous motor body 41, synchronously driving the compressor 5, thereby achieving the effect of utilizing the heat generated in the maleic anhydride preparation process through the steam turbine 2.

[0072] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A maleic anhydride preparation system with a steam-electric dual-drive unit, characterized in that: The invention comprises a reactor (A1), wherein the reactor (A1) is respectively connected to a compressor (5) and an n-butane storage tank (A2), a molten salt (A3) is arranged on the outside of the reactor (A1), a heat exchanger (A4) is connected on the outside of the reactor (A1), an outlet of the heat exchanger (A4) is connected back to the heat exchanger (A4), an output port of the heat exchanger (A4) is connected to a water vapor intermediate storage tank (A5), an output port of the water vapor intermediate storage tank (A5) is connected to a steam input mechanism (6), a steam turbine (2) is arranged at one end of the steam input mechanism (6), a bottom plate (1) is installed at the bottom of the steam turbine (2), a steam input mechanism (6) is arranged at one end of the steam turbine (2), the steam input mechanism (6) is connected to the steam turbine (2) and the reactor (A1), a self-synchronizing clutch (3) is arranged at the other end of the steam turbine (2), one end of the self-synchronizing clutch (3) is connected to the steam turbine (2), and a steam input mechanism (6) is connected to the steam turbine (2) and the reactor (A1). A permanent magnet synchronous motor (4) is arranged at one end of the permanent magnet synchronous motor (4), the compressor (5) is arranged at one end of the permanent magnet synchronous motor (4), the compressor (5) inputs compressed air into the reaction kettle (A1) to produce maleic anhydride, and a steam input mechanism (6) is provided, the steam input mechanism (6) comprises a load steam input pipe (67), the load steam input pipe (67) comprises a load input pipe body (671), a scraper assembly (672) is arranged inside the load input pipe body (671), the scraper assembly (672) comprises a first scraper mounting wheel (6721) and a second scraper mounting wheel (6722), a scraper shaft (6723) is rotatably mounted between the first scraper mounting wheel (6721) and the second scraper mounting wheel (6722), a scraper shaft (6723) is sleeved on the scraper shaft (6723), and a curved scraper (6725) is arranged in a circular array on the scraper shaft (6724).

2. The maleic anhydride preparation system with a steam-electric dual-drive unit according to claim 1, characterized in that: The steam turbine (2) comprises two support plates (21), the two support plates (21) are fixed on the bottom plate (1), a steam turbine body (22) is installed above the two support plates (21), a steam input port (23) is provided at one end of the steam turbine body (22), a power output port (24) is provided at the other end of the steam turbine body (22), and the steam input port (23) is connected to the steam input mechanism (6).

3. The maleic anhydride preparation system with a steam-electric dual-drive unit according to claim 2, characterized in that: The self-synchronizing clutch (3) comprises a synchronization input end (31), wherein the synchronization input end (31) is mounted on the base plate (1), a clutch body (32) is arranged on one side of the synchronization input end (31), and a synchronization output end (33) is arranged on the other side of the synchronization input end (31), and the clutch body (32) is fixedly connected to the power output port (24).

4. The maleic anhydride preparation system with a steam-electric dual-drive unit according to claim 1, characterized in that: The permanent magnet synchronous motor (4) comprises a synchronous motor body (41), one end of the synchronous motor body (41) is provided with a synchronous motor input end (42), the other end of the synchronous motor body (41) is provided with a synchronous motor output end (43), and the synchronous motor input end (42) is fixedly connected to the self-synchronizing clutch (3).

5. The maleic anhydride preparation system with a steam-electric dual-drive unit according to claim 4, characterized in that: The compressor (5) comprises a compressor body (51), one end of the compressor body (51) is provided with a compressor input end (52), the compressor input end (52) is fixedly connected to the synchronous motor output end (43), and the compressor body (51) is mounted on the base plate (1).

6. The maleic anhydride preparation system with a steam-electric dual-drive unit according to claim 1, characterized in that: The steam input mechanism (6) further comprises a steam input pipe (61), one end of which is connected to the compressor (5), the other end of which is provided with a steam connecting pipe (62), one end of which is provided with a first steam valve (63), and one axial end of which is provided with a compensating steam input pipe (68).

7. The maleic anhydride preparation system with a steam-electric dual-drive unit according to claim 6, characterized in that: A valve connecting pipe (64) is installed at the other axial end of the first steam valve (63), and a second steam valve assembly (65) is installed at the other end of the valve connecting pipe (64). The second steam valve assembly (65) includes a second valve body (652), and a first connecting port (653) is installed below the second valve body (652).

8. The maleic anhydride preparation system with a steam-electric dual-drive unit according to claim 7, characterized in that: A second connection port (654) is installed at one axial end of the second valve body (652), a third connection port (655) is installed at the other axial end of the second valve body (652), and an electromagnetic controller (651) is installed above the second valve body (652).

9. The maleic anhydride preparation system with a steam-electric dual-drive unit according to claim 8, characterized in that: The third connection port (655) is connected to the valve connection pipe (64), a discharge pipe (66) is installed on the first connection port (653), and a load steam input pipe (67) is installed on the second connection port (654).

10. The maleic anhydride preparation system with a steam-electric dual-drive unit according to claim 9, characterized in that: The structure of the first steam valve (63) is the same as that of the second steam valve assembly (65), and the scraper assembly (672) is installed on a side of the third connecting port (655) close to the load input pipe body (671).

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