Integrated thermoelectric comprehensive biodiesel production system and method thereof

Abstract

The present application relates to the technical field of biodiesel preparation, and particularly relates to an integrated heat and power comprehensive biodiesel preparation system, which comprises a solar drying system, a zeolite activation system, a catalyst preparation system and a biodiesel preparation system. The solar drying system is used for cleaning eggshells, drying the cleaned eggshells and conveying the eggshells to the catalyst preparation system. The zeolite activation system is used for activating zeolite, improving the adsorption performance and ion exchange performance of the zeolite, recycling waste heat and conveying the activated zeolite to the catalyst preparation system. The catalyst preparation system is used for preparing calcium methoxide solid base catalyst. The solar drying system and the zeolite activation system are connected to the catalyst preparation system. The biodiesel preparation system is used for preparing biodiesel. The catalyst preparation system and the biodiesel preparation system are connected. The catalyst is prepared by using waste eggshells and methanol. Two wastes are recycled and utilized. High-temperature calcination and soaking are combined, so that the activation process of the zeolite is sufficient and thorough.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of biodiesel preparation, in particular to an integrated heat and power comprehensive biodiesel preparation system and a preparation method thereof. BACKGROUND

[0002] Eggs are high-quality animal food for all mankind, and with the increasing production and consumption of eggs, the inedible part of the eggshell is produced in large quantities. Due to the special structure of the eggshell, it is difficult to decompose it in a high-temperature incinerator, and it can only be finally put into a landfill, which is not sustainable for the environment. In addition, fried foods are very popular because of their convenience and good taste, and the amount of waste cooking oil is also increasing. The discharge of a large amount of waste cooking oil causes serious environmental pollution and waste of resources.

[0003] The traditional waste cooking oil needs high extraction temperature, high labor intensity, low production efficiency, limited industrial application, which is not conducive to enterprise development, and poor environmental protection, which is not sustainable. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the problems of high extraction temperature, high labor intensity, low production efficiency, limited industrial application, which is not conducive to enterprise development, and poor environmental protection, which is not sustainable in the prior art, and to provide an integrated heat and power comprehensive biodiesel preparation system.

[0005] The technical solution adopted by the present application to solve the technical problem is: an integrated heat and power comprehensive biodiesel preparation system, comprising:

[0006] A solar drying system for cleaning eggshells and drying the cleaned eggshells and conveying the eggshells to a catalyst preparation system;

[0007] A zeolite activation system for activating zeolite to improve the adsorption and ion exchange properties of the zeolite and recovering waste heat and conveying the activated zeolite to the catalyst preparation system;

[0008] A catalyst preparation system for preparing calcium methoxide solid base catalyst, the solar drying system and the zeolite activation system are connected to the catalyst preparation system;

[0009] And a biodiesel preparation system for preparing biodiesel, the catalyst preparation system and the biodiesel preparation system are connected, the waste eggshells are used to prepare catalysts, the two wastes are recycled and utilized, and high-temperature calcination and soaking are combined to make the zeolite realize a full and complete activation process.

[0010] Further comprising the solar drying system comprises an eggshell crusher, an ultrasonic cleaning machine and a drying chamber, the eggshell crusher is used for crushing eggshells, the eggshell crusher and the ultrasonic cleaning machine are connected, the ultrasonic cleaning machine is used for cleaning eggshells, the drying chamber is used for drying eggshells and screening out qualified eggshells, and the qualified product output end of the drying chamber is connected with the catalyst preparation system.

[0011] Further comprising the solar drying system comprises an eggshell crusher, an ultrasonic cleaning machine and a drying chamber, the eggshell crusher is used for crushing eggshells, the eggshell crusher and the ultrasonic cleaning machine are connected, the ultrasonic cleaning machine is used for cleaning eggshells, the drying chamber is used for drying eggshells and screening out qualified eggshells, and the qualified product output end of the drying chamber is connected with the catalyst preparation system.

[0012] Further comprising the drying chamber comprises an outer shell, a screening plate and a receiving plate, the outer shell is double-layer vacuum glass, the screening plate and the receiving plate are both installed in the outer shell, and the screening plate is located above the receiving plate, the screening plate is used for screening eggshells, and the receiving plate is used for receiving the eggshells screened by the screening plate.

[0013] Further comprising the system for preparing biodiesel further comprises a thermoelectric power generation system, the thermoelectric power generation system comprises a solar heat collector, a heat storage box, a storage battery and a thermoelectric generator, the solar heat collector is connected with the heat storage box, the heat storage box is connected with the thermoelectric generator, the thermoelectric generator is connected with the zeolite activation system, the thermoelectric generator is connected with the storage battery, and the storage battery is connected with the power-consuming elements of the system for preparing biodiesel and supplies power to the power-consuming elements.

[0014] Further comprising the system for preparing biodiesel comprises a centrifugal machine, a water storage pool and an evaporation machine, the centrifugal machine is used for preparing crude biodiesel and glycerol, the centrifugal machine is connected with the evaporation machine, the evaporation machine is used for purifying the crude biodiesel to obtain refined biodiesel, the evaporation machine is connected with the water storage pool, and the water storage pool is connected with the thermoelectric generator.

[0015] Further comprising the zeolite activation system comprises a zeolite crusher, a high-temperature activation chamber and a zeolite extraction tank, the zeolite crusher is installed on the high-temperature activation chamber, the zeolite crusher is used for crushing zeolite, the zeolite crusher is connected with the high-temperature activation chamber, the high-temperature activation chamber is used for heating zeolite, the high-temperature activation chamber is connected with the zeolite extraction tank, the zeolite extraction tank is connected with the catalyst preparation system, and the zeolite extraction tank contains sodium chloride solution.

[0016] Further comprising the catalyst preparation system comprises a hot stirrer, a muffle furnace and a double-rotation hot stirrer, the hot stirrer is used for stirring and mixing eggshells and zeolite, the hot stirrer is connected with the muffle furnace, the muffle furnace is connected with the double-rotation hot stirrer, the muffle furnace is used for calcining the zeolite with adsorbed eggshells to obtain calcium oxide, and the double-rotation hot stirrer is used for mixing the calcium oxide and methanol to obtain a calcium methoxide solid alkali catalyst.

[0017] An integrated thermoelectric comprehensive preparation method of biodiesel, comprising the following steps:

[0018] S1: eggshell treatment: crushing the eggshells and then cleaning and drying them;

[0019] S2: zeolite activation: after the zeolite is crushed and sieved, the crushed zeolite is calcined at 450 DEG C for 4h in a high-temperature activation chamber for activation, and the once-activated zeolite is soaked in a zeolite leaching tank with sodium chloride for secondary activation;

[0020] S3: preparation of catalyst: the eggshells and the twice-activated zeolite are put into a hot stirrer, and after stirring at 60 DEG C for 7h, a mixture is obtained, the mixture is calcined in a muffle furnace for 4h to obtain calcium oxide attached to the zeolite, and the zeolite with calcium oxide attached is put into a double-rotation hot stirrer and mixed with methanol and heated and stirred for 20min to obtain a calcium methoxide solid base catalyst;

[0021] S4: preparation of biodiesel: the calcium methoxide solid base catalyst and waste cooking oil are put into a double-rotation hot stirrer, and a mixture is obtained by continuously stirring at 350rpm at 60 DEG C, the mixture is centrifuged in a centrifuge at a speed of 7500rmp for 10min, and after the reaction is completed, crude biodiesel and byproduct glycerol are obtained, and the crude biodiesel is evaporated in an evaporator at an environment of 80 DEG C to obtain refined biodiesel.

[0022] The beneficial effects of the present application are that the system for integrated heat and power comprehensive preparation of biodiesel provided by the present application

[0023] 1. The catalyst is prepared by using waste eggshells and methanol, and two wastes are recycled and utilized.

[0024] 2. The high-temperature calcination and soaking are combined to make the activation process of the zeolite complete and thorough.

[0025] 3. The preheating work is completed in the hot stirrer to maximize the utilization of thermal efficiency.

[0026] 4. The system further comprises a thermoelectric power generation device, solar energy is used for heating and power generation, the wall-mounted heat exchange pipe provides a heat source for the automatic drying room, the eggshells realize a complete and thorough drying process, the system can be electrically heated, recycled and supplied, and connected to the whole working system, energy saving, environmental protection, reduced production cost, safe, efficient and green and sustainable. BRIEF DESCRIPTION OF DRAWINGS

[0027] The present application will be further described below in combination with the drawings and examples.

[0028] Figure 1 is a structural schematic diagram of the present application;

[0029] Figure 2 is a structural schematic diagram of the solar drying system.

[0030] Figure: 1, solar drying system, 11, eggshell crusher, 12, ultrasonic cleaning machine, 13, drying chamber, 131, shell, 132, screening plate, 133, receiving plate, 14, eggshell extraction tank;

[0031] 2, zeolite activation system, 21, zeolite crusher, 22, high temperature activation chamber, 23, zeolite extraction tank;

[0032] 3, catalyst preparation system, 31, hot stirrer, 32, muffle furnace, 33, double rotary hot stirrer;

[0033] 4, biodiesel preparation system, 41, centrifuge, 42, water storage tank, 43, evaporator;

[0034] 5, thermoelectric power generation system, 51, solar heat collector, 52, heat storage box, 53, battery, 54, thermoelectric generator. DETAILED DESCRIPTION

[0035] The present application will now be described in further detail with reference to the drawings. These drawings are simplified schematic diagrams, which only schematically show the basic structure of the present application, and thus only show the components relevant to the present application.

[0036] As Figure 1 is a structural diagram of the present application, an integrated thermoelectric comprehensive biodiesel preparation system, comprising:

[0037] The solar drying system 1 is used to clean the eggshells, dry the cleaned eggshells, and transport the eggshells to the catalyst preparation system 3. The solar drying system 1 includes an eggshell crusher 11, an ultrasonic cleaning machine 12, and a drying chamber 13. The eggshell crusher 11 is used to crush the eggshells. The eggshell crusher 11 is connected to the ultrasonic cleaning machine 12. The ultrasonic cleaning machine 12 is used to clean the eggshells. The drying chamber 13 is used to dry the eggshells and screen out qualified eggshells. The qualified product output end of the drying chamber 13 is connected to the catalyst preparation system 3. The waste eggshells enter the eggshell crusher 11 for preliminary crushing. After crushing, the egg liquid adhering to the waste eggshells is preliminarily cleaned in the ultrasonic cleaning machine 12.

[0038] The solar drying system 1 includes an eggshell extraction tank 14. The unqualified product output end of the drying chamber 13 is connected to the input end of the eggshell extraction tank 14. The eggshell extraction tank 14 contains hydrochloric acid solution with a concentration of 10%.

[0039] The drying chamber 13 comprises a shell 131, a screening plate 132 and a receiving plate 133, the screening plate 132 is movably connected with the shell 131, the shell 131 is internally provided with an oscillation driving member for driving the screening plate 132, the screening plate 132 has square screen holes, the shell 131 is double-layer vacuum glass, the screening plate 132 and the receiving plate 133 are both installed in the shell 131, and the screening plate 132 is located above the receiving plate 133, the screening plate 132 is used for screening eggshells, and the receiving plate 133 is used for receiving the eggshells screened by the screening plate 132; the washed waste eggshells are put into the screening plate 132 and are subjected to preliminary screening, the drying chamber 13 provides a closed environment for drying reaction; the screening plate 132 is vibrated at intervals of a fixed time; the hole screen net drives the surrounding hot air to implement preliminary drying on the waste eggshells when the hole screen net is vibrated; the receiving plate 133 is located below the screening plate 132 and is used for receiving the crushed waste eggshells and drying them again; the drying chamber 13 is surrounded by heat preservation materials and is connected with heat exchange pipes of the heat storage box 52 or the solar heat collecting machine 51, and the top of the drying chamber 13 is double-layer vacuum glass, and sunlight can directly enter the chamber.

[0040] The zeolite activation system 2 is used for activating the zeolite, improving the adsorption performance and ion exchange performance of the zeolite, recovering waste heat and delivering the activated zeolite to the catalyst preparation system 3, and comprises a zeolite crusher 21, a high-temperature activation chamber 22 and a zeolite leaching tank 23; the zeolite crusher 21 is installed on the high-temperature activation chamber 22 and is used for crushing the zeolite; a sieve plate is arranged between the zeolite crusher 21 and the high-temperature activation chamber 22 and is used for screening the crushed zeolite; the zeolite crusher 21 is connected with the high-temperature activation chamber 22; the high-temperature activation chamber 22 is used for heating the zeolite; the high-temperature activation chamber 22 is connected with the zeolite leaching tank 23; the zeolite leaching tank 23 is connected with the catalyst preparation system 3; the zeolite leaching tank 23 is internally provided with a sodium chloride solution with a concentration of 4%; the high-temperature activation chamber 22 is surrounded by heat exchange pipes connected with the heat storage box 52 or the solar heat collecting machine 51; the high-temperature activation chamber 22 is connected with the hot end of the thermoelectric power generation system 5 to recover the excess heat; the adsorption performance and ion exchange performance of the completely activated zeolite are stronger than those of the natural zeolite, and the activated zeolite can more effectively adsorb CaO.

[0041] The catalyst preparation system 3 is used for preparing a calcium methoxide solid alkali catalyst, and is connected with the solar drying system 1 and the zeolite activation system 2; the catalyst preparation system 3 comprises a hot stirrer 31, a muffle furnace 32 and a double-rotation hot stirrer 33; the inside of the hot stirrer 31 is coated with an aluminum silicate coating; the hot stirrer 31 is used for stirring and mixing the eggshells and the zeolite; the hot stirrer 31 is connected with the muffle furnace 32; the muffle furnace 32 is connected with the double-rotation hot stirrer 33; the muffle furnace 32 is used for calcining the zeolite with the adsorbed eggshells to obtain calcium oxide; and the double-rotation hot stirrer 33 is used for mixing the calcium oxide and methanol to obtain the calcium methoxide solid alkali catalyst.

[0042] And a biodiesel preparation system 4 for preparing biodiesel, the catalyst preparation system 3 and the biodiesel preparation system 4 are connected, the biodiesel preparation system 4 comprises a centrifuge 41 for preparing crude biodiesel and glycerol, the centrifuge 41 and an evaporator 43 are connected, the evaporator 43 is used for purifying the crude biodiesel to obtain refined biodiesel, the evaporator 43 and a water storage tank 42 are connected, and the water storage tank 42 is connected with a thermoelectric generator 54.

[0043] The biodiesel preparation system further comprises a thermoelectric generation system 5, the thermoelectric generation system 5 comprises a solar heat collector 51, a heat storage tank 52, a battery 53 and a thermoelectric generator 54, the solar heat collector 51 comprises a high-magnification light-collecting plate in the shape of a hemisphere and a vacuum solar collector tube, the vacuum solar collector tube is installed on the high-magnification light-collecting plate through a support, and sunlight is reflected by the high-magnification light-collecting plate in the shape of a hemisphere during the day, so that heat is concentrated in the vacuum solar collector tube, and then heat recovery work is performed in the heat storage tank 52 through a heat exchange pipe; the heat storage tank 52 is connected with a hot end of the thermoelectric generator 54, so that excess heat is recovered; the solar heat collector 51 and the heat storage tank 52 are connected, the heat storage tank 52 and the thermoelectric generator 54 are connected, the thermoelectric generator 54 and the zeolite activation system 2 are connected, the thermoelectric generator 54 and the battery 53 are connected, the battery 53 is connected with and supplies power to electric elements of the biodiesel preparation system, and the thermoelectric generation device is used to provide required electric heat energy of energy-consuming equipment; the hot end of the thermoelectric generator 54 recovers waste heat through the connection of the heat storage tank 52 and the high-temperature activation chamber 22, so as to obtain heat, and the cold end is connected with the water storage tank 53; electrons move between the hot end and the cold end through an N-type semiconductor and a P-type semiconductor, and correspond to the positive and negative poles of a power supply, so as to form a power generation device and provide electric energy for electric appliances required by the whole system.

[0044] The present application realizes the utilization of two wastes, waste eggshells and waste edible oil, solves the secondary utilization of a large number of waste eggshells and hogwash oil and the like, achieves energy saving, environmental protection and green sustainability.

[0045] A preparation method of an integrated thermoelectric comprehensive biodiesel preparation system, comprising the following steps:

[0046] S1: eggshell treatment: the eggshells are crushed, cleaned and dried;

[0047] S2: zeolite activation: the crushed zeolite is sieved, and then the crushed zeolite is calcined at 450 DEG C for 4h in a high-temperature activation chamber 22 for activation; the once-activated zeolite is soaked in a zeolite leaching tank 23 with sodium chloride for secondary activation; and 250g of the crushed and activated zeolite is completely immersed in 100ml of distilled water.

[0048] S3: Preparation of catalyst: 80g eggshell and 250g zeolite were mixed with 100ml distilled water and put into a hot stirrer 31, and the mixture was stirred at 60°C for 7h, then the mixture was put into a muffle furnace 32 and calcined at 700°C for 4h to obtain calcium oxide attached to the zeolite, and the calcined product with calcium oxide attached was put into a double-rotation hot stirrer 33 and a small amount of methanol was added for several times, and the stirring was performed while heating, and after 20min, the stirring was stopped until a light yellow calcium methoxide solid base catalyst appeared (during the process, the methanol solution was rapidly volatilized due to heating);

[0049] S4: Preparation of biodiesel: 270g calcium methoxide solid base catalyst and 30g waste cooking oil were put into a double-rotation hot stirrer 33, and the mixture was continuously stirred at 350rpm at 60°C to obtain a mixture, and the mixture was put into a centrifuge 41 and centrifuged at a speed of 7500rpm for 10min, and after the reaction was completed, crude biodiesel and byproduct glycerol were obtained, and the crude biodiesel was put into an evaporator 43 and evaporated at an environment of 80°C to remove unreacted methanol, and refined biodiesel was obtained.

[0050] Example:

[0051] Eggshell treatment: The eggshell was crushed, washed and dried;

[0052] Zeolite activation: The modified zeolite specially adsorbed CaO was crushed and sieved, and the crushed zeolite was activated by calcination at 450°C for 4h, and the once-activated zeolite was soaked in a 4% NaCl solution for secondary activation;

[0053] Preparation of catalyst: 80g eggshell and 250g zeolite were mixed with 100ml distilled water and put into a hot stirrer 31, and the mixture was stirred at 60°C for 7h, then the mixture was put into a muffle furnace 32 and calcined at 700°C for 4h to obtain calcium oxide attached to the zeolite, and the calcined product with calcium oxide attached was put into a double-rotation hot stirrer 33 and a small amount of methanol was added for several times, and the stirring was performed while heating, and after 20min, the stirring was stopped until a light yellow calcium methoxide solid base catalyst appeared (during the process, the methanol solution was rapidly volatilized due to heating);

[0054] Preparation of biodiesel: 270g calcium methoxide solid base catalyst and 30g waste cooking oil were put into a double-rotation hot stirrer 33, and the mixture was continuously stirred at 350rpm at 60°C to obtain a mixture, and the mixture was put into a centrifuge 41 and centrifuged at a speed of 7500rpm for 10min, and after the reaction was completed, crude biodiesel and byproduct glycerol were obtained, and the crude biodiesel was put into an evaporator 43 and evaporated at an environment of 80°C to remove unreacted methanol, and refined biodiesel was obtained.

[0055] Comparative example:

[0056] Preparation of catalyst: The eggshell was cleaned, crushed by a crusher, sieved, and calcined at 1000°C for 15min to obtain the catalyst.

[0057] Preparation of mixture A: take waste cooking oil at 60-70 DEG C temperature slowly add catalyst, stirring, reaction mixture A is generated; the amount of catalyst is 1% of the mass of waste cooking oil;

[0058] Preparation of biodiesel: to mixture A, add methanol, keep at 60-70 DEG C temperature, reaction 4h, stirring 30min, separate the bottom glycerol aqueous solution and catalyst, then start vacuum distillation system, evaporate the remaining methanol, and get;

[0059] But the traditional method of preparing biodiesel, its working equipment by high voltage power supply circuit of the motor provides power, and the motor work will produce noise pollution and motor in the process of running produces high heat, and the motor has some lubricating oil, oil, etc. will produce harmful gases under the condition of heating and pollute the environment;

[0060] The traditional method of preparing biodiesel does not recycle the heat generated by each reaction, which causes a lot of waste heat;

[0061] Data comparison:

[0062]

[0063] The difference between the present scheme and the traditional biodiesel extraction scheme is that the modified zeolite specially for CaO adsorption is used to adsorb pure CaO and separate other impurities such as magnesium oxide, aluminum hydroxide from eggshells to improve the production efficiency of the catalyst. Renewable energy solar energy is used to provide the heat energy required by each link of the system, and it is pollution-free to the environment. A thermoelectric power generation system is set up to recycle the excess heat generated by each reaction and provide electric energy to each electric appliance. The present scheme focuses on energy supply and recovery, energy saving and environmental protection, reduces production cost, is safe, efficient and green and sustainable.

[0064] With the above ideal embodiments according to the present application as inspiration, through the above description, relevant personnel can make various changes and modifications without deviating from the scope of the technical idea of the present application. The technical scope of the present application is not limited to the contents of the specification, and must be determined by the scope of the claims.

Claims

1. An integrated thermoelectric system for producing biodiesel, characterized in that, include: A solar drying system (1) is used to clean eggshells and dry the cleaned eggshells and to transport the eggshells to a catalyst preparation system (3). A zeolite activation system (2) is used to activate zeolite to improve its adsorption and ion exchange performance, recover waste heat, and transport the activated zeolite to a catalyst preparation system (3). The zeolite activation system (2) includes a zeolite pulverizer (21), a high-temperature activation chamber (22), and a zeolite extraction tank (23). The zeolite pulverizer (21) is installed on the high-temperature activation chamber (22) and is used to pulverize zeolite. The zeolite pulverizer (21) is connected to the high-temperature activation chamber (22) and is used to heat zeolite. The high-temperature activation chamber (22) is connected to the zeolite extraction tank (23) and is connected to the catalyst preparation system (3). The zeolite extraction tank (23) contains a sodium chloride solution. The catalyst preparation system (3) is used to prepare methanol calcium solid base catalyst. The solar drying system (1) and the zeolite activation system (2) are both connected to the catalyst preparation system (3). And a biodiesel preparation system (4) for preparing biodiesel, wherein the catalyst preparation system (3) and the biodiesel preparation system (4) are connected; The biodiesel preparation system also includes a thermoelectric generator system (5), which includes a solar thermal generator (51), a heat storage box (52), a battery (53), and a thermoelectric generator (54). The solar thermal generator (51) is connected to the heat storage box (52), the heat storage box (52) is connected to the thermoelectric generator (54), the thermoelectric generator (54) is connected to the zeolite activation system (2), the thermoelectric generator (54) is connected to the battery (53), and the battery (53) is connected to the electrical components of the biodiesel preparation system and supplies power to the electrical components.

2. The integrated thermoelectric biodiesel production system as described in claim 1, characterized in that: The solar drying system (1) includes an eggshell crusher (11), an ultrasonic cleaner (12), and a drying chamber (13). The eggshell crusher (11) is used to crush eggshells. The eggshell crusher (11) and the ultrasonic cleaner (12) are connected. The ultrasonic cleaner (12) is used to clean eggshells. The drying chamber (13) is used to dry eggshells and screen out qualified eggshells. The qualified product output end of the drying chamber (13) is connected to the catalyst preparation system (3).

3. The integrated thermoelectric biodiesel production system as described in claim 2, characterized in that: The solar drying system (1) includes an eggshell extraction tank (14), the output end of the unqualified product of the drying chamber (13) is connected to the input end of the eggshell extraction tank (14), and the eggshell extraction tank (14) contains hydrochloric acid solution.

4. The integrated thermoelectric biodiesel production system as described in claim 2, characterized in that: The drying chamber (13) includes an outer shell (131), a screening plate (132), and a receiving plate (133). The outer shell (131) is a double-layered vacuum glass. The screening plate (132) and the receiving plate (133) are both installed inside the outer shell (131), and the screening plate (132) is located above the receiving plate (133). The screening plate (132) is used to screen eggshells, and the receiving plate (133) is used to receive eggshells screened out by the screening plate (132).

5. The integrated thermoelectric biodiesel production system as described in claim 1, characterized in that: The biodiesel preparation system (4) includes a centrifuge (41), a water storage tank (42), and an evaporator (43). The centrifuge (41) is used to prepare crude biodiesel and glycerol. The centrifuge (41) and the evaporator (43) are connected. The evaporator (43) is used to purify crude biodiesel to obtain refined biodiesel. The evaporator (43) and the water storage tank (42) are connected. The water storage tank (42) is connected to a thermoelectric generator (54).

6. The integrated thermoelectric biodiesel production system as described in claim 1, characterized in that: The catalyst preparation system (3) includes a thermal stirrer (31), a muffle furnace (32), and a double-swirl thermal stirrer (33). The thermal stirrer (31) is used to stir and mix eggshells and zeolite. The thermal stirrer (31) is connected to the muffle furnace (32), and the muffle furnace (32) is connected to the double-swirl thermal stirrer (33). The muffle furnace (32) is used to calcine zeolite adsorbed with eggshells to obtain calcium oxide. The double-swirl thermal stirrer (33) is used to mix calcium oxide and methanol to obtain a methyl methacrylate solid base catalyst.

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