Fluidized bed reactor temperature control method, storage medium, and electronic device

Abstract

The application provides a fluidized bed reactor temperature control method, a storage medium and an electronic device. The method comprises the following steps: monitoring reactor information in real time; if the reactor information changes, a first target fuel feed flow rate is received, a target cooling medium total heat transfer area is calculated according to the current fuel feed flow rate and the first target fuel feed flow rate; and the reactor temperature is adjusted according to the target cooling medium total heat transfer area, the first target fuel feed flow rate and preset preset scheduling information of a cooling coil. By implementing the application, the reactor temperature is controlled by using the fuel feed flow rate and the cooling medium total flow rate when the load is raised or lowered, so that the automatic adjustment of the reactor temperature during the start-up and shutdown stages is realized, manual control of the valve is not needed, the frequency and risk of the on-site operation of the operator are reduced, and the safety is improved.

Description

Technical Field

[0001] This invention relates to the field of chemical engineering, and in particular to a method for temperature control of a fluidized bed reactor, a storage medium, and electronic equipment. Background Technology

[0002] A fluidized bed reactor is a device in which a chemical reaction takes place within a boiling bed composed of solid materials or a catalyst. Currently, the start-up and shutdown of fluidized bed reactors are all done manually by personnel. When the reactor temperature or feed flow rate changes, on-site personnel manually open the cooling coil valves to control the reactor temperature. This involves frequent on-site operations during start-up and shutdown. Due to the inherent characteristics of fluidized bed reactors, there are requirements regarding the sequence of cooling medium introduction into the internal coils and the feed flow rate. It is necessary to avoid uneven cooling of the reactor or the cooling coil bursting when the cooling medium is introduced due to excessively rapid valve opening. Therefore, the accuracy of on-site operations by personnel is highly demanding, making automatic temperature control of the reactor impossible, and the risks associated with on-site personnel operation are significant. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fluidized bed reactor temperature control method, storage medium and electronic equipment. The method uses dual cross-limiting control of fuel feed flow rate and total heat transfer area of ​​cooling medium to control the reactor temperature during load increase and decrease, realizing automatic adjustment of reactor temperature during start-up and shutdown, eliminating the need for manual valve control, reducing the frequency and risk of on-site operation by operators, and improving safety.

[0004] The technical solution of the present invention provides a method for temperature control of a fluidized bed reactor, comprising:

[0005] Real-time monitoring of reactor information, including reactor temperature and current fuel feed flow rate;

[0006] If the reactor information changes, a first target fuel feed flow rate is received, and the total heat transfer area of ​​the target cooling medium is calculated based on the current fuel feed flow rate and the first target fuel feed flow rate.

[0007] The reactor temperature is adjusted according to the total heat transfer area of ​​the target cooling medium, the first target fuel feed flow rate, and the preset scheduling information of the cooling coils. The preset scheduling information includes the scheduling sequence of the cooling coils and the valve opening time.

[0008] Furthermore, if the reactor information changes and a first target fuel feed flow rate is received, calculating the total heat transfer area of ​​the target cooling medium based on the current fuel feed flow rate and the first target fuel feed flow rate includes:

[0009] The second target fuel feed rate is calculated based on the current fuel feed rate and the first target fuel feed rate;

[0010] The first target reactor total cooling rate is obtained based on the second target fuel feed flow rate;

[0011] The heat transfer coefficient of the cooling medium in the cooling coil is obtained, and the total heat transfer area of ​​the target cooling medium is calculated based on the total cooling rate of the first target reactor and the heat transfer coefficient of the cooling medium.

[0012] The step of adjusting the reactor temperature based on the total heat transfer area of ​​the target cooling medium, the first target fuel feed flow rate, and preset scheduling information of the cooling coil includes:

[0013] The cooling coil is controlled according to the total heat transfer area of ​​the target cooling medium and the preset scheduling information.

[0014] Furthermore, the step of calculating the second target fuel feed flow rate based on the current fuel feed flow rate and the first target fuel feed flow rate includes:

[0015] The maximum value between the current fuel feed rate and the second target fuel feed rate is taken as the first sub-second target fuel feed rate;

[0016] Obtain the increased fuel flow rate and calculate the second sub-target fuel feed flow rate based on the increased fuel flow rate and the current fuel feed flow rate;

[0017] The minimum value between the second sub-target feed flow rate and the second sub-second target fuel feed flow rate is taken as the second target fuel feed flow rate.

[0018] Furthermore, if the reactor information changes, calculating the total heat transfer area of ​​the target cooling medium based on the current fuel feed flow rate and the first target fuel feed flow rate includes:

[0019] Obtain the current total cooling pipe flow rate of the cooling coil, and calculate the current total cooling rate of the reactor based on the current total cooling pipe flow rate and the heat transfer coefficient of the cooling medium;

[0020] The step of adjusting the reactor temperature based on the total heat transfer area of ​​the target cooling medium, the first target fuel feed flow rate, and preset scheduling information of the cooling coil includes:

[0021] The reactor fuel feed regulating valve is controlled based on the first target fuel feed flow rate and the current total reactor cooling rate.

[0022] Furthermore, the step of obtaining the current total cooling pipe flow rate of the cooling coil and calculating the current total cooling rate of the reactor based on the current total cooling pipe flow rate and the heat transfer coefficient of the cooling medium includes:

[0023] The minimum of the current total cooling rate of the reactor and the total cooling rate of the first target reactor is taken as the first sub-current total cooling rate;

[0024] Obtain the cooling capacity of the increased cooling coil corresponding to the cooling coil, and calculate the total cooling rate of the second target reactor based on the total cooling rate of the first target reactor and the cooling capacity of the cooling coil;

[0025] The maximum value between the total cooling rate of the first sub-reactor and the total cooling rate of the second target reactor is taken as the total cooling rate of the current reactor.

[0026] Furthermore, the valve opening time is less than or equal to the time interval between adjacent fuel load increases and decreases.

[0027] Furthermore, the number of cooling coils is even, and the scheduling order is set using the following method:

[0028] The cooling coils are symmetrically distributed according to the four quadrants of the reactor's cross-section;

[0029] Based on the center position of the reactor's cross-section, the reactor is arranged symmetrically, first from the inside out, then from the outside in.

[0030] Furthermore, the total heat exchange area of ​​the cooling coils in the four quadrants of the reactor's cross-section is the same.

[0031] The present invention also provides a storage medium that stores computer instructions, which, when executed by a computer, are used to perform all steps of the fluidized bed reactor temperature control method described above.

[0032] The present invention also provides an electronic device, comprising:

[0033] At least one processor; and,

[0034] A memory communicatively connected to the at least one processor; wherein,

[0035] The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the fluidized bed reactor temperature control method as described above.

[0036] The above technical solution has the following beneficial effects: By monitoring reactor information in real time, if the reactor information changes, the first target fuel feed flow rate is received. The total heat transfer area of ​​the target cooling medium is calculated based on the current fuel feed flow rate and the first target fuel feed flow rate. The reactor temperature is adjusted according to the total heat transfer area of ​​the target cooling medium, the first target fuel feed flow rate, and the preset scheduling information of the cooling coil. This realizes the automatic adjustment of reactor temperature during start-up and shutdown, eliminating the need for manual valve control, reducing the frequency and risk of on-site operation by operators, and improving safety. Attached Figure Description

[0037] The disclosure of this invention will become more readily understood by referring to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings:

[0038] Figure 1 The flowchart illustrates a method for controlling the temperature of a fluidized bed reactor according to Embodiment 1 of the present invention.

[0039] Figure 2 This is a flowchart illustrating a fluidized bed reactor temperature control method according to Embodiment 2 of the present invention.

[0040] Figure 3 This is a schematic diagram of the cooling coil structure of the present invention;

[0041] Figure 4 This is a schematic diagram of the hardware structure of an electronic device for temperature control in a fluidized bed reactor, provided in Embodiment 4 of the present invention. Detailed Implementation

[0042] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0043] It is readily understood that, based on the technical solution of this invention, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of the invention.

[0044] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0045] Example 1

[0046] like Figure 1 As shown, Figure 1 A flowchart of a fluidized bed reactor temperature control method provided in Embodiment 1 of the present invention includes:

[0047] Step S101: Monitor reactor information in real time;

[0048] Step S102: If the reactor information changes, the first target fuel feed flow rate is received, and the total heat transfer area of ​​the target cooling medium is calculated based on the current fuel feed flow rate and the first target fuel feed flow rate.

[0049] Step S103: Adjust the reactor temperature according to the total heat transfer area of ​​the target cooling medium, the first target fuel feed flow rate, and the preset scheduling information of the cooling coil.

[0050] Specifically, the controller monitors reactor information in real time, including reactor temperature and current fuel feed flow rate. When reactor information changes (such as changes in reactor temperature or fuel feed flow rate), step S102 is executed to receive the first target fuel feed flow rate (the first target fuel feed flow rate can be a fuel percentage or a specific fuel flow rate value). Based on the current fuel feed flow rate and the first target fuel feed flow rate, the total heat transfer area of ​​the target cooling medium is calculated. Finally, step S103 is executed to adjust the reactor temperature based on the total heat transfer area of ​​the target cooling medium, the first target fuel feed flow rate, and preset scheduling information for the cooling coils. The preset scheduling information includes the scheduling sequence of the cooling coils and the valve opening time.

[0051] It should be noted that the cooling medium refers to the medium used to cool the reactor; preferably, the cooling medium is cooling water.

[0052] By implementing this invention, reactor information is monitored in real time. If the reactor information changes, a first target fuel feed flow rate is received. The total heat transfer area of ​​the target cooling medium is calculated based on the current fuel feed flow rate and the first target fuel feed flow rate. The reactor temperature is then adjusted based on the total heat transfer area of ​​the target cooling medium, the first target fuel feed flow rate, and the preset scheduling information of the cooling coil. This allows for automatic adjustment of the reactor temperature during start-up and shutdown phases by controlling the load increase and decrease using the fuel feed flow rate and the total cooling medium flow rate. This eliminates the need for manual valve control, reduces the frequency and risk of on-site operations, and improves safety.

[0053] Example 2

[0054] like Figure 2 As shown, Figure 2A flowchart of a fluidized bed reactor temperature control method provided in Embodiment 2 of the present invention includes:

[0055] Step S201: Monitor reactor information in real time;

[0056] Step S202: If the reactor information changes, the first target fuel feed flow rate is received, and the second target fuel feed flow rate is obtained based on the current fuel feed flow rate and the first target fuel feed flow rate;

[0057] Step S203: Obtain the first target reactor total cooling rate based on the second target fuel feed flow rate;

[0058] Step S204: Obtain the heat transfer coefficient of the cooling medium in the cooling coil, and calculate the total heat transfer area of ​​the target cooling medium based on the total cooling rate of the first target reactor and the heat transfer coefficient of the cooling medium;

[0059] Step S205: Control the cooling coils according to the total heat transfer area of ​​the target cooling medium and the preset scheduling information;

[0060] Step S206: Obtain the current total cooling pipe flow rate of the cooling coil, and calculate the current total cooling rate of the reactor based on the current total cooling pipe flow rate and the heat transfer coefficient of the cooling medium;

[0061] Step S207: Control the reactor fuel feed regulating valve according to the first target fuel feed flow rate and the current total cooling rate of the reactor.

[0062] Specifically, the controller monitors reactor information in real time. If the reactor information changes, firstly, step S202 is executed to receive the first target fuel feed flow rate. Based on the current fuel feed flow rate and the first target fuel feed flow rate, the second target fuel feed flow rate is obtained. For example, when the first target fuel feed flow rate is a percentage, the second target fuel feed flow rate is the current fuel feed flow rate plus the product of the current fuel feed flow rate and the first target fuel feed flow rate. Secondly, the controller executes step S203, based on the principle that the heat release rate equals the cooling rate, the total cooling rate of the first target reactor is equal to the heat release rate of the second target fuel feed flow rate, thus obtaining the total cooling rate of the first target reactor.

[0063] Next, the controller executes step S204 to obtain the heat transfer coefficient of the cooling medium in the cooling coil, and calculates the total heat transfer area of ​​the target cooling medium based on the total cooling rate of the first target reactor and the heat transfer coefficient of the cooling medium. The total heat transfer area of ​​the target cooling medium can be calculated using the following formula:

[0064]

[0065] Among them, H coolneed The total cooling rate of the first target reactor is expressed in kW (watts); Hf The heat release rate of the second target fuel feed flow rate, in kW; ΔH r The heat released per mole of the reaction is expressed in kJ / mol; N yield(T) F represents the number of moles of fuel feed to the reactor, expressed in mol / s. f The second target fuel feed rate is expressed in kg / s; M is the mole fraction of the fuel, expressed in kg / mol; and U is the heat transfer coefficient of the cooling coil, expressed in W / m². 2 .s; A is the total heat transfer area of ​​the target cooling medium, in m² 2 T1 is the inlet temperature of the cooling medium in the cooling coil, in K; T2 is the outlet temperature of the cooling medium in the cooling coil, in K.

[0066] It should be noted that the total heat exchange area of ​​the cooling coils is the sum of the heat exchange areas of individual cooling coils. Since the cooling coils are cylindrical, the heat exchange area of ​​a single cooling coil can be calculated using π*d*L, where L is the length of the cooling coil.

[0067] Next, the controller executes step S205 to obtain the required number of cooling coils based on the total heat transfer area of ​​the target cooling medium, and controls the opening or closing of the cooling coils according to the obtained required number of cooling coils and preset scheduling information. The required number of cooling coils corresponds to the total heat transfer area of ​​the target cooling medium, and this correspondence is preset in the controller, allowing the number of cooling coils to be obtained based on the calculated total heat transfer area of ​​the target cooling medium. It should be noted that the correspondence between the number of cooling coils and the total heat transfer area of ​​the target cooling medium can be preset in the controller. During use, the required number of cooling coils can be found by looking up a table.

[0068] Then, the controller executes step S206 to obtain the current total cooling pipe flow rate of the cooling coil through the flow meter, and calculates the current total cooling rate of the reactor based on the current total cooling pipe flow rate and the heat transfer coefficient of the cooling medium. The current total cooling rate of the reactor can be calculated using the following formula:

[0069] H cool =F′ wm *C w *(T2-T1) (2)

[0070] Among them, H cool F′ represents the current total cooling rate of the reactor, in kW. wm This represents the current total cooling pipe flow rate, in kg / s; C w This is the specific heat capacity at constant pressure of the cooling medium, expressed in kJ / kg·K.

[0071] Finally, the controller executes step S208 to control the reactor feed regulating valve according to the first target fuel feed flow rate.

[0072] It should be noted that the order of steps S202-S205 and steps S206-S208 can be interchanged depending on the different operations of the reactor. When the reactor load is increased, steps S202-S205 are executed first, followed by steps S206-S208, to increase the total heat transfer area of ​​the cooling medium first, and then increase the fuel feed flow rate. When the reactor load is decreased, steps S206-S208 are executed first, followed by steps S202-S205, to decrease the fuel feed flow rate first, and then decrease the total heat transfer area of ​​the cooling medium. This achieves dual cross-limiting of the fuel feed flow rate and the total heat transfer area of ​​the cooling medium, automatically adjusting the reactor temperature during load increases and decreases, and improving safety.

[0073] Preferably, to avoid excessive cooling after a single cooling coil is put into operation, which could cause a sudden drop in reactor temperature and affect the reaction, the fuel load corresponding to the cooling amount after a single cooling coil is put into operation is less than 5%.

[0074] By implementing this invention, the reactor temperature is automatically adjusted during reactor load increases and decreases by employing dual cross-limiting of fuel feed flow rate and total heat transfer area of ​​cooling medium. This achieves automatic temperature regulation of the reactor during start-up and shutdown, eliminating the need for manual valve control, reducing the frequency and risk of on-site operations for operators, and improving safety.

[0075] In one embodiment, step S202 includes:

[0076] The maximum value between the current fuel feed rate and the second target fuel feed rate is taken as the first sub-second target fuel feed rate;

[0077] Obtain the fuel increase flow rate and calculate the second sub-target fuel feed flow rate based on the fuel increase flow rate and the current fuel feed flow rate;

[0078] The minimum value between the first sub-second target fuel feed rate and the second sub-second target fuel feed rate is taken as the second target fuel feed rate.

[0079] Specifically, the current fuel feed flow rate and the second target fuel feed flow rate are selected from the higher values ​​to obtain the first sub-second target fuel feed flow rate. The fuel increase flow rate is obtained, which is the fuel increase flow rate corresponding to the activation of the m-th cooling coil. The fuel increase flow rate and the current fuel feed flow rate are added together to calculate the second sub-second target fuel feed flow rate. Finally, the first sub-second target fuel feed flow rate and the second sub-second target fuel feed flow rate are selected from the lower values ​​to obtain the second target fuel feed flow rate. This avoids the fuel load from rising too quickly, which could lead to a reactor explosion, and further improves safety.

[0080] In one embodiment, step S206 includes:

[0081] The minimum of the current total cooling rate of the reactor and the total cooling rate of the first target reactor is taken as the total cooling rate of the first sub-current reactor.

[0082] Obtain the cooling capacity of the added cooling coil, and calculate the total cooling capacity of the second target reactor based on the total cooling rate of the first target reactor and the cooling capacity of the cooling coil.

[0083] The maximum value between the current total cooling rate of the first sub-reactor and the total cooling amount of the second target reactor is taken as the current total cooling rate of the reactor.

[0084] Specifically, the total cooling rate of the current reactor and the total cooling rate of the first target reactor are selected from the lower values ​​to obtain the total cooling rate of the first sub-current reactor. The cooling amount of the cooling coil corresponding to the addition of the m-th cooling coil is obtained. The total cooling amount of the second target reactor is calculated by subtracting the total cooling rate of the first target reactor from the cooling amount of the cooling coil. Finally, the total cooling rate of the first sub-current reactor and the total cooling amount of the second target reactor are selected from the higher values ​​to obtain the total cooling rate of the current reactor. This avoids the cooling medium from increasing too quickly, which could lead to a reactor explosion and further improves safety.

[0085] In one embodiment, the valve opening time is less than or equal to the time interval between adjacent fuel load increases and decreases.

[0086] Specifically, valve opening time refers to the time it takes for the valve to open from 0% to 100%. The time interval between adjacent fuel load increases and decreases represents the time it takes for the fuel load to change from X... m-1 % increased to X m The time interval is set to be less than or equal to the time interval between the load increases and decreases of adjacent fuels. This ensures that the cooling load corresponds to the heat release load, and that the rate of application of the cooling medium is faster than the rate of heat release of the oxidation reaction. This prevents the reactor from overheating due to slow cooling during the load increase process.

[0087] Preferably, the opening time for a valve opening degree of 1% is 15s to 20s.

[0088] In one embodiment, such as Figure 3 As shown, the number of cooling coil tubes (11 tubes) is even, and the scheduling order is set using the following method:

[0089] The cooling coils 11 are symmetrically distributed according to the four quadrants of the reactor's cross-section;

[0090] Based on the center position of the reactor's cross-section, the reactor is arranged symmetrically, first from the inside out, then from the outside in.

[0091] Specifically, the reactor is cylindrical in shape with a circular cross-section. Two perpendicular diameters divide the reactor's cross-section into a centrally symmetrical figure, thus creating four symmetrical quadrants, such as... Figure 3 As shown, the cooling coils 11 are symmetrically distributed according to the four quadrants of the reactor's cross-section. During use, they are arranged symmetrically, starting from the inside out and then from the outside in, according to the center position of the reactor's cross-section. For example... Figure 3 As shown, taking 28 cooling coils as an example, Figure 3 The serial number in This indicates the operating sequence of the cooling coils. When using them, first open cooling coil ①, located in the first quadrant closest to the center of the reactor's cross-section. Once the valve of cooling coil ① is fully open, then open cooling coil ②, located in the third quadrant furthest from the center of the reactor's cross-section, and so on. The sequence number is used for scheduling, and the temperature of the reactor is adjusted both internally and externally to achieve uniform temperature regulation and further improve safety.

[0092] Preferably, in order to facilitate automatic control of the cooling coil 11, the valves of the cooling coil 11 can be numbered so that the cooling coil 11 can be scheduled in a scheduling order.

[0093] Preferably, in order to ensure uniform cooling and avoid local overheating that could damage the catalyst, the total heat exchange area of ​​the cooling coils 11 arranged in the four quadrants of the reactor's cross-section is the same.

[0094] Preferably, to further ensure uniform cooling, the temperature difference of the reactor at the same cross-section within the cooling coil 11 reactor does not exceed 3°C.

[0095] In one embodiment, to ensure uniform cooling and avoid localized overheating that could damage the catalyst, the total heat exchange area of ​​the cooling coils 11 in the four quadrants of the reactor's cross-section is the same.

[0096] The following example illustrates how the catalytic oxidation reaction of m-xylene (hereinafter referred to as MX), ammonia (hereinafter referred to as NH3), and air (hereinafter referred to as Air) in a fluidized bed reactor to produce isophthalonitrile (hereinafter referred to as MXPN) can automatically control the reactor temperature using the fluidized bed reactor temperature control method provided by this invention, ensuring that the reactor temperature remains within the normal range. Specifically:

[0097] Experiment 1

[0098] During the initial start-up phase and load increase, Air was introduced into the fluidized bed reactor to react with NH3 to produce ammonia. After raising the reactor temperature to 370℃, the tail oxygen content decreased to below 5%. MX was then introduced, with MX, NH3, and Air added in proportion. When the MX flow rate was 200 Nm3 / h, the corresponding load was 10%. Four U-tubes (one cooling coil) were used to increase the load from 200 Nm3 / h to 1120 Nm3 / h. The corresponding cooling coil was used up to the 14th one within 60 minutes. During the adjustment process, when the reaction temperature increased from low to high, the cooling coil was used first, and then the fuel addition was increased to stabilize the reaction temperature from 400℃ to 403℃. The number of U-tubes used for cooling (cooling water was used throughout) and the change in load corresponded to the relationship in Table 1. During the load increase process, the highest reactor temperature was 404℃ and the lowest was 396℃, and the reactor temperature was controlled within the normal reaction temperature range.

[0099] Experiment 2

[0100] During the load ramp-up phase, when the MX flow rate was 1360 Nm³ / h, the corresponding load was 68%. Sixteen U-tubes (one cooling coil) were put into operation to increase the load from 1360 Nm³ / h to 2080 Nm³ / h. The corresponding cooling coil was put into operation up to the 24th one within 48 minutes. During the adjustment process, when the reaction temperature was rising from low to high, the cooling coil was put into operation first, and then the fuel addition was increased to make the reaction temperature steadily stabilize from 405℃ to 407℃. The number of cooling water U-tubes put into operation and the change in load conformed to the correspondence in Table 1. During the load ramp-up process, the reactor temperature was highest at 408℃ and lowest at 402℃, and the reactor temperature was controlled within the normal reaction temperature range.

[0101] Experiment 3

[0102] During the load reduction phase, when the MX flow rate was 2400 Nm3 / h, the corresponding load was 120%. 28 cooling coils were put into operation, and the load was reduced from 120% to 88%. The number of cooling coils was reduced to 20 within 48 minutes. The reaction temperature stabilized from 407℃ to 404℃. During the load reduction process, the reactor temperature was highest at 409℃ and lowest at 402℃. The reactor temperature was controlled within the normal reaction temperature range.

[0103] Experiment 4

[0104] During the load reduction phase, when the MX flow rate was 1360 Nm3 / h, the corresponding load was 68%. Sixteen cooling coils were put into operation, and the load was reduced from 68% to 24%. The number of cooling coils was reduced to the eighth coil within 48 minutes. The reaction temperature stabilized from 406℃ to 403℃. During the load reduction process, the reactor temperature was highest at 409℃ and lowest at 402℃. The reactor temperature was controlled within the normal reaction temperature range.

[0105] Example 3

[0106] Embodiment 3 of the present invention provides a storage medium for storing computer instructions. When the computer executes the computer instructions, it is used to perform all steps of the fluidized bed reactor temperature control method in any of the method embodiments described above.

[0107] Example 4

[0108] like Figure 4 As shown in the figure, a hardware structure diagram of an electronic device for temperature control of a fluidized bed reactor provided in Embodiment 5 of the present invention includes:

[0109] At least one processor 401; and,

[0110] Memory 402 is communicatively connected to at least one processor 401; wherein,

[0111] The memory 402 stores instructions that can be executed by at least one processor 401, which enables the at least one processor 401 to perform the fluidized bed reactor temperature control method as described above.

[0112] Figure 4 Take a processor 401 as an example.

[0113] The electronic device is preferably an electronic control unit (ECU).

[0114] The electronic device may also include an input device 403 and an output device 404.

[0115] The processor 401, memory 402, input device 403 and output device 404 can be connected by a bus or other means. The figure shows an example of connection by bus.

[0116] Memory 402, as a non-volatile computer-readable storage medium, can be used to obtain non-volatile software programs, non-volatile computer-executable programs, and modules, such as the program instructions / modules corresponding to the fluidized bed reactor temperature control method in the embodiments of this application, for example, Figures 1-2 The method flow is shown. The processor 401 executes various functional applications and data processing by running non-volatile software programs, instructions, and modules acquired in the memory 402, thereby realizing the fluidized bed reactor temperature control method in the above embodiments.

[0117] The memory 402 may include a program acquisition area and a data acquisition area, wherein the program acquisition area may acquire an operating system and an application program required for at least one function; the data acquisition area may acquire data created based on the use of the fluidized bed reactor temperature control method, etc. Furthermore, the memory 402 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 402 may optionally include memory remotely located relative to the processor 401, and these remote memories may be connected via a network to the apparatus performing the fluidized bed reactor temperature control method. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0118] The input device 403 can receive user clicks and generate signal inputs related to user settings and function control of the fluidized bed reactor temperature control method. The output device 404 may include a display device such as a display screen.

[0119] When the one or more modules are accessed in the memory 402 and run by the one or more processors 401, the fluidized bed reactor temperature control method in any of the above method embodiments is executed.

[0120] The above-described product can perform the methods provided in the embodiments of this application, and has the corresponding functional modules and beneficial effects for performing the methods. Technical details not described in detail in this embodiment can be found in the methods provided in the embodiments of this application.

[0121] The electronic devices of this invention exist in various forms, including but not limited to:

[0122] (1) Electronic Control Unit (ECU), also known as "vehicle computer" or "on-board computer", is mainly composed of a microprocessor (CPU), memory (ROM, RAM), input / output interface (I / O), analog-to-digital converter (A / D), and large-scale integrated circuits for shaping and driving.

[0123] (2) Mobile communication devices: These devices are characterized by their mobile communication capabilities and primarily aim to provide voice and data communication. These terminals include: smartphones (e.g., iPhones), multimedia phones, feature phones, and low-end phones, etc.

[0124] (3) Ultra-mobile personal computer devices: These devices fall under the category of personal computers, have computing and processing capabilities, and generally also have mobile internet access capabilities. These terminals include: PDAs, MIDs, and UMPCs, etc.

[0125] (4) Portable entertainment devices: These devices can display and play multimedia content. This category includes: audio and video players (such as iPods), handheld game consoles, e-books, as well as smart toys and portable car navigation devices.

[0126] (5) Server: A device that provides computing services. The components of a server include a processor, hard disk, memory, system bus, etc. Servers are similar to general computer architectures, but because they need to provide highly reliable services, they have higher requirements in terms of processing power, stability, reliability, security, scalability, and manageability.

[0127] (6) Other electronic devices with data interaction functions.

[0128] Furthermore, the logical instructions in the aforementioned memory 402 can be implemented as software functional units and sold or used as independent products, and can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a mobile terminal (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0129] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of the embodiments of the present invention according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0130] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0131] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and are not intended to limit them. Although the embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for temperature control in a fluidized bed reactor, characterized in that, include: Real-time monitoring of reactor information, including reactor temperature and current fuel feed flow rate; If the reactor information changes, a first target fuel feed flow rate is received, and the total heat transfer area of ​​the target cooling medium is calculated based on the current fuel feed flow rate and the first target fuel feed flow rate. The reactor temperature is adjusted according to the total heat transfer area of ​​the target cooling medium, the first target fuel feed flow rate, and the preset scheduling information of the cooling coils. The preset scheduling information includes the scheduling sequence of the cooling coils and the valve opening time.

2. The fluidized bed reactor temperature control method as described in claim 1, characterized in that, If the reactor information changes, and a first target fuel feed flow rate is received, the total heat transfer area of ​​the target cooling medium is calculated based on the current fuel feed flow rate and the first target fuel feed flow rate, including: The second target fuel feed rate is obtained based on the current fuel feed rate and the first target fuel feed rate; The first target reactor total cooling rate is obtained based on the second target fuel feed flow rate; The heat transfer coefficient of the cooling medium in the cooling coil is obtained, and the total heat transfer area of ​​the target cooling medium is calculated based on the total cooling rate of the first target reactor and the heat transfer coefficient of the cooling medium. The step of adjusting the reactor temperature based on the total heat transfer area of ​​the target cooling medium, the first target fuel feed flow rate, and preset scheduling information of the cooling coil includes: The cooling coil is controlled according to the total heat transfer area of ​​the target cooling medium and the preset scheduling information.

3. The fluidized bed reactor temperature control method as described in claim 2, characterized in that, The step of obtaining the second target fuel feed flow rate based on the current fuel feed flow rate and the first target fuel feed flow rate includes: The maximum value between the current fuel feed rate and the second target fuel feed rate is taken as the first sub-second target fuel feed rate; Obtain the increased fuel flow rate and calculate the second sub-target fuel feed flow rate based on the increased fuel flow rate and the current fuel feed flow rate; The minimum value between the first sub-second target fuel feed flow rate and the second sub-second target fuel feed flow rate is taken as the second target fuel feed flow rate.

4. The fluidized bed reactor temperature control method as described in claim 2, characterized in that, If the reactor information changes, the total heat transfer area of ​​the target cooling medium is calculated based on the current fuel feed flow rate and the first target fuel feed flow rate, including: Obtain the current total cooling pipe flow rate of the cooling coil, and calculate the current total cooling rate of the reactor based on the current total cooling pipe flow rate and the heat transfer coefficient of the cooling medium; The step of adjusting the reactor temperature based on the total heat transfer area of ​​the target cooling medium, the first target fuel feed flow rate, and preset scheduling information of the cooling coil includes: The reactor fuel feed regulating valve is controlled based on the first target fuel feed flow rate and the current total reactor cooling rate.

5. The fluidized bed reactor temperature control method as described in claim 4, characterized in that, The step of obtaining the current total cooling pipe flow rate of the cooling coil and calculating the current total cooling rate of the reactor based on the current total cooling pipe flow rate and the heat transfer coefficient of the cooling medium includes: The minimum of the current total cooling rate of the reactor and the total cooling rate of the first target reactor is taken as the first sub-current total cooling rate; Obtain the cooling capacity of the increased cooling coil corresponding to the cooling coil, and calculate the total cooling rate of the second target reactor based on the total cooling rate of the first target reactor and the cooling capacity of the cooling coil; The maximum value between the total cooling rate of the first sub-reactor and the total cooling rate of the second target reactor is taken as the total cooling rate of the current reactor.

6. The fluidized bed reactor temperature control method as described in claim 1, characterized in that, The valve opening time is less than or equal to the time interval between adjacent fuel load increases and decreases.

7. The method for temperature control of a fluidized bed reactor as described in any one of claims 1-6, characterized in that, The number of cooling coils is even, and the scheduling order is set using the following method: The cooling coils are symmetrically distributed according to the four quadrants of the reactor's cross-section; Based on the center position of the reactor's cross-section, the reactor is arranged symmetrically, first from the inside out, then from the outside in.

8. The fluidized bed reactor temperature control method as described in claim 7, characterized in that, The total heat exchange area of ​​the cooling coils in the four quadrants of the reactor's cross-section is the same.

9. A storage medium, characterized in that, The storage medium stores computer instructions, which, when executed by the computer, are used to perform all the steps of the fluidized bed reactor temperature control method as described in any one of claims 1-8.

10. An electronic device, characterized in that, include: At least one processor; as well as, A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the fluidized bed reactor temperature control method as described in any one of claims 1-8.

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