Production equipment for producing ferulic acid by taking rice bran oil nigre as raw material

Abstract

The utility model relates to production equipment for producing ferulic acid by taking rice bran oil nigre as a raw material, which comprises a reaction tank, a settling separation device and an acidification filtering device which are sequentially communicated, the nigre and alkali liquor are subjected to saponification hydrolysis reaction in the reaction tank under the reaction conditions of high temperature, high pressure and catalyst catalysis, and the ferulic acid is obtained. The obtained reaction product is subjected to settling separation in a settling separation device to obtain a water-phase saponification solution, the saponification solution is subjected to two times of acidification filtration in an acidification filtration device to obtain crude ferulic acid, and the crude ferulic acid is subjected to hot melting impurity removal and cold precipitation crystallization to obtain the finished ferulic acid. The device disclosed by the utility model can effectively realize the production of extracting the finished product ferulic acid from the rice bran oil nigre, and is simple in structure and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of the preparation and production of ferulic acid, and particularly relates to a production device for producing ferulic acid by using rice bran oil soapstock as a raw material. Background Art

[0002] The chemical name of ferulic acid is 4-hydroxy-3-methoxycinnamic acid, which is one of the derivatives of cinnamic acid (also known as cinnamon acid, 3-phenyl-2-acrylic acid). The relative molecular mass of ferulic acid is 194.19, the melting point is 174 °C, it is slightly soluble in cold water, soluble in hot water, easily soluble in ethanol, methanol, and acetone, hardly soluble in benzene and petroleum ether, and has good pH stability.

[0003] Ferulic acid is a highly efficient functional antioxidant, which has functions such as anti-thrombosis, prevention of atherosclerosis and heart disease, antibacterial and anti-inflammatory, anti-platelet aggregation and thrombosis formation, protection of the cardiovascular system, and enhancement of immunity. Therefore, ferulic acid has a wide range of applications in the fields of medicine, food, cosmetics, etc.

[0004] Rice bran oil soapstock is a by-product in the processing of rice bran oil into rice bran oil, and it contains rich oryzanol. Oryzanol is a combined fat of ferulic acid and phytosterol. Oryzanol is insoluble in water, soluble in alkaline methanol or ethanol solution, and insoluble in acidic methanol or ethanol solution. Research has found that the content of oryzanol in rice bran oil soapstock is about 25-30%, which is an ideal raw material for preparing natural ferulic acid. China is a major grain-producing country with rich rice bran resources. Therefore, in recent years, technicians have developed methods for extracting ferulic acid from rice bran oil soapstock, such as the Chinese invention patent with the application number "2020108244743" and the name "Method for Separating and Extracting Natural Ferulic Acid from Rice Bran Oil Soapstock Containing Oryzanol", and the Chinese invention patent with the application number "2020102894983" and the name "Method for Separating and Purifying Ferulic Acid from Refined Rice Bran Oil Soapstock", etc. However, the extraction of ferulic acid from rice bran oil soapstock is a new technology that has emerged in recent years and belongs to the recycling of by-products in rice bran oil production. At present, the research on extracting ferulic acid from rice bran oil soapstock is mainly focused on the extraction method process, and there is no relevant record of its production equipment in the existing technology. Content of the Utility Model

[0005] In view of this, in order to overcome the deficiencies of the prior art, the utility model provides a production device for producing ferulic acid by using rice bran oil soapstock as a raw material, which has a reaction tank for providing high-temperature and high-pressure reaction conditions for the saponification hydrolysis reaction of soapstock, a sedimentation separation device for sedimentation separation of saponification products, an acid precipitation filtration device for separating crude ferulic acid from the saponification solution, and a purification device for purifying crude ferulic acid. The utility model can effectively realize the production of finished ferulic acid from rice bran oil soapstock, and has a simple structure and is convenient to use.

[0006] To achieve the above object, the technical solution provided by the present utility model is as follows:

[0007] A production device for producing ferulic acid with rice bran oil soapstock as the raw material, which includes a reaction tank, a sedimentation and separation device, and an acid precipitation and filtration device connected in sequence.

[0008] The reaction tank has an inner cavity for material reaction, a feed port, a discharge port, and an air inlet connected to the inner cavity, a stirring device for stirring the material, and a heating medium channel for heating the material. The material enters the inner cavity from the feed port. The heating medium channel is connected to the deoxidized steam pipeline, and the air inlet is connected to the deoxidized steam pipeline. The discharge port of the reaction tank is connected to the sedimentation and separation device through a pipeline.

[0009] The sedimentation and separation device has:

[0010] A sedimentation tank, whose feed port is connected to the discharge port of the reaction tank. The sedimentation tank has a solid phase outlet and an aqueous phase outlet. The aqueous phase outlet is connected to the acid precipitation and filtration device through a pipeline, and the solid phase outlet is connected to a waste discharge device through a pipeline. The sedimentation tank has a heat preservation medium channel for heat preservation, and the heat preservation medium channel is connected to the deoxidized steam pipeline.

[0011] The acid precipitation and filtration device includes:

[0012] A primary acid precipitation tank, whose feed port is connected to the aqueous phase outlet of the sedimentation tank through a pipeline. The discharge port of the primary acid precipitation tank is connected to the feed port of a primary filtration device through a pipeline. The primary acid precipitation tank has an acid inlet, an activated carbon inlet, a temperature control medium channel, and a stirring device for stirring. The acid inlet is connected to an acid liquid storage tank through an acid inlet pipeline, the activated carbon inlet is connected to an activated carbon pipeline, and the control medium channel is connected to a cooling water pipeline and a deoxidized steam pipeline.

[0013] The primary filtration device has a clear liquid outlet and a turbid liquid outlet. The clear liquid outlet is connected to the feed port of a secondary acid precipitation tank through a pipeline, and the turbid liquid outlet is connected to a waste discharge device through a pipeline.

[0014] A secondary acid precipitation tank, whose discharge port is connected to the feed port of a secondary filtration device through a pipeline. The secondary acid precipitation tank has an acid inlet and a temperature control medium channel. The acid inlet is connected to an acid liquid storage tank through an acid inlet pipeline, the activated carbon inlet is connected to an activated carbon pipeline, and the temperature control medium channel is connected to a freezing water pipeline and a cooling water pipeline.

[0015] The secondary filtration device has a filter residue outlet and a filtrate outlet. The filtrate outlet is connected to a sewage treatment device, and the filter residue flowing out from the filter residue outlet is the crude ferulic acid.

[0016] Furthermore, it further includes a purification device, and the purification device includes:

[0017] The hot melting tank has its feed inlet connected to the filter residue outlet of the secondary filtration device through a pipeline. The hot melting tank has a hot soft water inlet and an activated carbon inlet communicating with its inner cavity, a heating medium channel for heating and a stirring device for stirring. The hot soft water inlet is connected to a hot soft water pipeline, the activated carbon inlet is connected to an activated carbon pipeline, and the heating medium channel is connected to a deoxidized steam pipeline.

[0018] The tertiary filtration device has its feed inlet connected to the discharge outlet of the hot melting tank through a pipeline. The tertiary filtration device has a clear liquid outlet and a turbid liquid outlet. The clear liquid outlet is connected to the feed inlet of the cold crystallization tank through a pipeline, and the turbid liquid outlet is connected to a waste discharge device through a pipeline.

[0019] The cold crystallization tank has its discharge outlet connected to the quaternary filtration device through a pipeline. The cold crystallization tank has a vacuum air outlet and a temperature control medium channel. The vacuum air outlet is connected to the intake port of a vacuum pump through a pipeline, and the outlet of the vacuum pump is emptied. The temperature control medium channel is connected to a cooling water pipeline and a freezing water pipeline.

[0020] The quaternary filtration device has a filter residue outlet and a filtrate outlet. The filter residue outlet is connected to a drying device, and the filtrate outlet is connected to a sewage treatment system.

[0021] Furthermore, the purification device further includes a cooler. The cooler is a plate heat exchanger. The feed inlet of the cooler is connected to the clear liquid outlet of the tertiary filtration device, the discharge outlet of the cooler is connected to the feed inlet of the cold crystallization tank through a pipeline, and the cooling medium inlet of the cooler is connected to a freezing water pipeline.

[0022] Furthermore, it further includes a metering and mixing device. The metering and mixing device includes:

[0023] The foots tank has its discharge outlet connected to the feed inlet of the metering and mixing tank through a pipeline. The foots tank has a heating medium channel for heating the foots to soften it, and the heating medium channel is connected to a deoxidized steam pipeline.

[0024] The lye tank has its discharge outlet connected to the feed inlet of the metering and mixing tank through a pipeline.

[0025] The metering and mixing tank has its discharge outlet connected to the feed inlet of the reaction tank through a pipeline. The metering and mixing tank has a heating medium channel for heating the materials and a stirring device, and the heating medium channel is connected to a deoxidized steam pipeline.

[0026] Furthermore, it further includes a sedimentation buffer tank. The feed inlet of the sedimentation buffer tank is connected to the solid phase outlet of the sedimentation tank through a pipeline and a buffer pump. The sedimentation buffer tank has a solid phase outlet, an aqueous phase outlet and a heat preservation medium channel. The heat preservation medium channel is connected to a deoxidized steam pipeline. The aqueous phase outlet of the sedimentation buffer tank is connected to the feed inlet of the primary acid precipitation tank, and the solid phase outlet of the sedimentation buffer tank is connected to a waste discharge device through a solid phase transport pump.

[0027] Further, it further includes a primary clear liquid tank. The clear liquid outlet of the primary filtration device is connected to the feed inlet of the primary clear liquid tank through a pipeline. The outlet of the primary clear liquid tank is connected to the feed inlet of the secondary acid precipitation tank through a primary clear liquid pump and a pipeline. The primary clear liquid tank has a heat preservation medium channel for heat preservation, and the heat preservation medium channel is connected to the deoxidized steam pipeline.

[0028] Further, it further includes a tertiary clear liquid tank. The clear liquid outlet of the tertiary filtration device is connected to the feed inlet of the tertiary clear liquid tank through a pipeline. The outlet of the tertiary clear liquid tank is connected to the feed inlet of the cold precipitation tank through a tertiary clear liquid pump and a pipeline. The tertiary clear liquid tank has a heat preservation medium channel for heat preservation, and the heat preservation medium channel is connected to the deoxidized steam pipeline.

[0029] Further, a reaction product transfer pump is provided on the pipeline connecting the discharge port of the reaction tank and the feed inlet of the sedimentation tank. A water phase transfer pump is provided on the pipeline connecting the water phase outlet of the sedimentation tank and the feed inlet of the primary acid precipitation tank. A primary acid precipitation pump is provided on the pipeline connecting the discharge port of the primary acid precipitation tank and the feed inlet of the primary filtration device. A secondary acid precipitation pump is provided on the pipeline connecting the discharge port of the secondary acid precipitation tank and the feed inlet of the secondary filtration device. A hot dissolution pump is provided on the pipeline connecting the discharge port of the hot dissolution tank and the feed inlet of the tertiary filtration device. A cold precipitation pump is provided on the pipeline connecting the discharge port of the cold precipitation tank and the feed inlet of the quaternary filtration device.

[0030] Further, both the primary filtration device and the tertiary filtration device are diaphragm filters, and both the secondary filtration device and the quaternary filtration device are pull-bag centrifuges.

[0031] Further, it further includes a condensate system. The condensate system includes a condensate recovery pipeline, a condensate tank, and a condensate pump. The condensate recovery pipeline is respectively connected to the heating medium channel of the soapstock tank, the heating medium channel of the metering and mixing tank, the heating medium channel of the reaction tank, the heat preservation medium channel of the sedimentation tank, the heat preservation medium channel of the sedimentation buffer tank, the temperature control medium channel of the primary acid precipitation tank, the heating medium channel of the hot dissolution tank, the heat preservation medium channel of the primary clear liquid tank, and the heat preservation medium channel of the tertiary clear liquid tank. The condensate recovery pipeline is connected to the water inlet of the condensate tank. The water outlet of the condensate tank is respectively connected to the water inlet of the boiler device and the water inlet of the hot soft water tank through a pipeline by the condensate pump. The hot soft water tank has a heating medium channel, and the heating medium channel is connected to the deoxidized steam pipeline and the condensate recovery pipeline. The hot soft water tank uses deoxidized steam to heat the condensate to generate hot soft water. The boiler device heats the condensate to evaporate and generate deoxidized steam, and the deoxidized steam outlet of the boiler device is connected to the deoxidized steam pipeline.

[0032] The beneficial effects of the present utility model are:

[0033] 1. The metering and mixing device of the present utility model can accurately weigh materials, mix the materials evenly, and convey the evenly mixed materials into the reaction tank for reaction. The reaction tank of the present utility model has a heating medium channel for heating materials. Deoxygenated steam is introduced into the heating medium channel to heat the materials by using the deoxygenated steam. The reaction tank of the present utility model has an air inlet communicating with its inner cavity. Deoxygenated steam is introduced into the reaction inner cavity of the reaction tank to increase the pressure in the reaction inner cavity by using the deoxygenated steam, so as to provide high-temperature and high-pressure conditions for the saponification hydrolysis reaction of soapstock and lye, make the soapstock fully alkalized and decomposed, and make the oryzanol in the soapstock fully decomposed into ferulates, thereby improving the yield of ferulic acid. The acid precipitation and filtration device of the present utility model performs two acid precipitations and two filtrations on the saponified solution after saponification hydrolysis to obtain crude ferulic acid. The purification device of the present utility model utilizes the characteristic that ferulic acid is soluble in hot water and insoluble in cold water. First, the crude ferulic acid is dissolved in hot soft water, and then the solution is filtered to remove impurities and cooled to precipitate ferulic acid crystals from the solution, thereby obtaining finished ferulic acid. The structure is simple, easy to use, and can effectively realize the extraction of ferulic acid from rice bran oil soapstock.

[0034] 2. The primary filtration device and the tertiary filtration device of the present utility model both adopt diaphragm filters. The diaphragm filter can filter the solution into clear liquid and turbid liquid, and impurities such as glycerol in the solution are filtered and separated in the form of turbid liquid. The secondary filtration device and the tertiary filtration device of the present utility model adopt a pull-bag centrifuge. The pull-bag filter directly separates the crude ferulic acid or finished ferulic acid from the solution in a solid state. The structure is simple and easy to use.

[0035] 3. The condensate water system of the present utility model recovers the condensate water generated by the condensation of deoxygenated steam, and conveys the recovered condensate water back to the boiler for heating, realizing the recycling and reuse of water resources and saving water resources. The hot soft water used to dissolve the crude ferulic acid of the present utility model is prepared by heating the condensate water recovered by the condensate water system, without the need to produce soft water additionally, saving water resources and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic structural diagram of the metering and mixing device, reaction tank and sedimentation separation device of the present utility model;

[0037] Figure 2 It is a schematic structural diagram of the primary acid precipitation tank and the primary filtration device of the present utility model;

[0038] Figure 3 It is a schematic structural diagram of the secondary acid precipitation tank and the secondary filtration device of the present utility model;

[0039] Figure 4 It is a schematic structural diagram of the purification device of the present utility model.

[0040] Reference Signs:

[0041] Soapstock tank 1, soapstock pump 2, lye tank 3, lye pump 4, metering and mixing tank 5, metering and conveying pump 6, reaction tank 7, reaction product conveying pump 8, settling tank 9, settling buffer tank 10, aqueous phase conveying pump 11, buffer pump 12, solid phase conveying pump 13, acid solution storage tank 14, acid solution pump 15, acid inlet pipeline 16, first acid precipitation tank 17, first acid precipitation pump 18, first filtration device 19, first clear liquid tank 20, first clear liquid pump 21, first turbid liquid tank 22, first turbid liquid pump 23, second acid precipitation tank 24, second acid precipitation pump 25, second filtration device 26, hot dissolution tank 27, hot dissolution pump 28, third filtration device 29, third clear liquid tank 30, third clear liquid pump 31, third turbid liquid tank 32, third turbid liquid pump 33, cooler 34, cold precipitation tank 35, cold precipitation pump 36, fourth filtration device 37, deoxidized steam pipeline 38, condensate recovery pipeline 39, activated carbon pipeline 40, condensate tank 41, condensate pump 42, hot soft water tank 43, cooling water pipeline 44, chilled water pipeline 45, vacuum pump 46, boiler 47, drying device 48. Detailed implementation mode

[0042] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments:

[0043] As Figure 1 shown, a production device for producing ferulic acid from rice bran oil soapstock, wherein, it includes a metering and mixing device, a reaction tank 7, a settling and separation device, an acid precipitation and filtration device, and a purification device that are connected in sequence.

[0044] The metering and mixing device includes a soapstock tank 1, a lye tank 3, and a metering and mixing tank 5. The soapstock tank 1 is used to collect and store rice bran oil soapstock. The discharge port of the soapstock tank 1 is connected to the feed port of the metering and mixing tank 5 through a pipeline and a soapstock pump 2. The soapstock tank 1 has a heating medium channel for heating the soapstock to soften it, and the heating medium channel is connected to the deoxidized steam pipeline 38. The lye tank 3 is used to store lye, such as sodium hydroxide solution or potassium hydroxide solution. The discharge port of the lye tank 3 is connected to the feed port of the metering and mixing tank 5 through a pipeline and a lye pump 4. The discharge port of the metering and mixing tank 5 is connected to the feed port of the reaction tank 7 through a pipeline and a metering and mixing pump. The metering and mixing tank 5 has a heating medium channel for heating the material and a stirring device, and the heating medium channel is connected to the deoxidized steam pipeline 38.

[0045] The reaction tank 7 described above has an inner cavity for material reaction, a feed port, a discharge port, and an air inlet that communicate with the inner cavity, a stirring device for stirring the material, and a heating medium channel for heating the material. The metering and mixing pump sends the evenly mixed soapstock, lye, and zinc chloride catalyst in the metering and mixing tank 5 into the inner cavity of the reaction tank 7 through the feed port of the reaction tank 7. The heating medium channel is connected to the deoxidized steam pipeline 38, and the deoxidized steam enters the heating medium channel to heat the reaction material. The air inlet is connected to the deoxidized steam pipeline 38, and the deoxidized steam enters the inner cavity of the reaction tank 7 from the air inlet to increase the reaction pressure. The discharge port of the reaction tank 7 is connected to the sedimentation and separation device through a pipeline and a reaction product transfer pump 8.

[0046] The sedimentation and separation device described above includes a sedimentation tank 9 and a sedimentation buffer tank 10. The feed port of the sedimentation tank 9 is connected to the discharge port of the reaction product transfer pump 8. The sedimentation tank 9 has a solid phase outlet, an aqueous phase outlet, and a heat preservation medium channel. The sedimentation tank 9 has a heat preservation medium channel for heat preservation, and the heat preservation medium channel is connected to the deoxidized steam pipeline 38. The aqueous phase outlet of the sedimentation tank 9 is connected to the inlet of the aqueous phase transfer pump 11 through a pipeline. The outlet of the aqueous phase transfer pump 11 is connected to the acid precipitation and filtration device through a pipeline. The solid phase outlet of the sedimentation tank 9 is connected to the feed port of the sedimentation buffer tank 10 through a pipeline and a buffer pump 12. The sedimentation buffer tank 10 has a solid phase outlet, an aqueous phase outlet, and a heat preservation medium channel. The heat preservation medium channel of the sedimentation buffer tank 10 is connected to the deoxidized steam pipeline 38. The aqueous phase outlet of the sedimentation buffer tank 10 is connected to the inlet of the aqueous phase transfer pump 11 through a pipeline. The solid phase outlet of the sedimentation buffer tank 10 is connected to the waste discharge device through a solid phase transfer pump 13.

[0047] Such as Figure 2The described acid precipitation and filtration device includes a primary acid precipitation tank 17, a primary acid precipitation pump 18, a primary filtration device 19, a secondary acid precipitation tank 24, a secondary acid precipitation pump 25, and a secondary filtration device 26. The feed inlet of the primary acid precipitation tank 17 is connected to the outlet of the aqueous phase transfer pump 11, and the discharge outlet of the primary acid precipitation tank 17 is connected to the feed inlet of the primary filtration device 19 through a pipeline and the primary acid precipitation pump 18. The primary acid precipitation tank 17 has an acid inlet, an activated carbon inlet, a temperature control medium channel, and a stirring device for stirring. The acid inlet is connected to the outlet of the acid liquid transfer pump through an acid inlet pipeline 16. The inlet of the acid liquid transfer pump is connected to the outlet of the acid liquid storage tank 14. The activated carbon inlet is connected to the activated carbon pipeline 40. The temperature control medium channel is connected to the cooling water pipeline 44 and the deoxidized steam pipeline 38. The primary acid precipitation tank 17 has a temperature sensor, and the temperature control medium entering the temperature control medium channel is controlled through the temperature sensor and a valve. The temperature control medium is the cooling water in the cooling water pipeline 44 or the deoxidized steam in the deoxidized steam pipeline 38. The primary filtration device 19 is a diaphragm filter, which has a clear liquid outlet and a turbid liquid outlet. The clear liquid outlet is connected to the feed inlet of the primary clear liquid tank 20 through a pipeline. The discharge outlet of the primary clear liquid tank 20 is connected to the feed inlet of the primary clear liquid pump 21 through a pipeline. The discharge outlet of the primary clear liquid pump 21 is connected to the feed inlet of the secondary acid precipitation tank 24 through a pipeline. The turbid liquid outlet of the primary filtration device 19 is connected to the feed inlet of the primary turbid liquid tank 22 through a pipeline. The discharge outlet of the primary turbid liquid tank 22 is connected to the waste discharge device through the primary turbid liquid pump 23 and a pipeline.

[0048] As Figure 3 shown, the secondary acid precipitation tank 24 has an acid inlet and a temperature control medium channel. The acid inlet is connected to the outlet of the acid liquid transfer pump through an acid inlet pipeline 16. The inlet of the acid liquid transfer pump is connected to the outlet of the acid liquid storage tank 14. Acid liquid is added into the secondary acid precipitation tank 24 through the acid inlet. The temperature control medium channel of the secondary acid precipitation tank 24 is connected to the chilled water pipeline 45 and the cooling water pipeline 44. The secondary acid precipitation tank 24 has a temperature sensor, and the temperature control medium entering the temperature control medium channel is controlled through the temperature sensor and a valve. The temperature control medium is the cooling water in the cooling water pipeline 44 or the chilled water in the chilled water pipeline 45. The discharge outlet of the secondary acid precipitation tank 24 is connected to the feed inlet of the secondary filtration device 26 through a pipeline and the secondary acid precipitation pump 25. The secondary filtration device 26 is a pull-bag centrifuge, which has a filter residue outlet and a filtrate outlet. The filtrate outlet is connected to the sewage treatment device, and the filter residue flowing out from the filter residue outlet is the crude ferulic acid.

[0049] As Figure 4As shown in the figure, the purification device includes a hot dissolution tank 27, a three - stage filtration device 29, a cooler 34, a cold precipitation tank 35, a four - stage filtration device 37, and a drying device 48. The feed inlet of the hot dissolution tank 27 is connected to the residue outlet of the secondary filtration device 26 through a pipeline. The hot dissolution tank 27 has a hot soft water inlet, an activated carbon inlet, a heating medium channel for heating, and a stirring device for stirring, which communicate with its inner cavity. The hot soft water inlet is connected to a hot soft water pipeline, and hot soft water is added into the hot dissolution tank 27 through the hot soft water pipeline. The activated carbon inlet is connected to an activated carbon pipeline 40, and activated carbon is added into the hot dissolution tank 27 through the activated carbon pipeline 40. The heating medium channel is connected to a deoxidized steam pipeline 38, and deoxidized steam is introduced into the heating medium channel through the deoxidized steam pipeline 38. The hot dissolution tank 27 has a temperature sensor, and the amount of deoxidized steam entering the heating medium channel is controlled by the temperature sensor and a valve. The discharge outlet of the hot dissolution tank 27 is connected to the feed inlet of the three - stage filtration device 29 through a pipeline and a hot dissolution pump 28. The three - stage filtration device 29 is a diaphragm filter, which has a clear liquid outlet and a turbid liquid outlet. The clear liquid outlet is connected to the feed inlet of a three - stage clear liquid tank 30 through a pipeline. The discharge outlet of the three - stage clear liquid tank 30 is connected to the feed inlet of a three - stage clear liquid pump 31 through a pipeline. The discharge outlet of the three - stage clear liquid pump 31 is connected to the feed inlet of the cooler 34 through a pipeline. The turbid liquid outlet of the three - stage filtration device 29 is connected to the feed inlet of a three - stage turbid liquid tank 32 through a pipeline. The discharge outlet of the three - stage turbid liquid tank 32 is connected to a waste discharge device through a three - stage turbid liquid pump 33 and a pipeline. The cooler 34 is a plate heat exchanger. The discharge outlet of the cooler 34 is connected to the feed inlet of the cold precipitation tank 35 through a pipeline. The cooling medium inlet of the cooler 34 is connected to a chilled water pipeline 45. The cold precipitation tank 35 has a vacuum outlet and a temperature - controlled medium channel. The vacuum outlet is connected to the intake port of a vacuum pump 46 through a pipeline, and the outlet of the vacuum pump 46 is emptied. The temperature - controlled medium channel is connected to a cooling water pipeline 44 and a chilled water pipeline 45. The cold precipitation tank 35 has a temperature sensor, and the temperature - controlled medium entering the temperature - controlled medium channel is controlled by the temperature sensor and a valve. The temperature - controlled medium is the cooling water in the cooling water pipeline 44 or the chilled water in the chilled water pipeline 45. The discharge outlet of the cold precipitation tank 35 is connected to the four - stage filtration device 37 through a pipeline and a cold precipitation pump 36. The four - stage filtration device 37 is a pull - bag centrifuge, which has a filter residue outlet and a filtrate outlet. The filter residue outlet is connected to the drying device 48, and the filtrate outlet is connected to a sewage treatment system.

[0050] The heating medium channels of the soap stock tank 1, the heating medium channels of the metering and mixing tank 5, the heating medium channels of the reaction tank 7, the heat preservation medium channels of the sedimentation tank 9, the heat preservation medium channels of the sedimentation buffer tank 10, the temperature control medium channels of the primary acid precipitation tank 17, the heating medium channels of the hot dissolution tank 27, the heat preservation medium channels of the primary clear liquid tank 20 and the heat preservation medium channels of the tertiary clear liquid tank 30 are all connected to the condensate recovery pipeline 39. The condensate recovery pipeline 39 is connected to the water inlet of the condensate tank 41. The water outlet of the condensate tank 41 is respectively connected to the water inlet of the boiler 47 device and the water inlet of the hot soft water tank 43 through pipelines by a condensate pump 42. The hot soft water tank 43 has a heating medium channel. The condensate recovery pipeline 39 is respectively connected to the heating medium channel to connect the deoxidized steam pipeline 38 and the condensate recovery pipeline 39. The hot soft water tank 43 heats the condensate with deoxidized steam to generate hot soft water. The boiler 47 device heats the condensate to evaporate and generate deoxidized steam. The deoxidized steam outlet of the boiler 47 device is connected to the deoxidized steam pipeline 38.

[0051] During use, add soap stock into the soap stock tank 1, and introduce deoxidized steam into the heating medium channel of the soap stock tank 1. The deoxidized steam heats the soap stock in the soap stock tank 1 to soften the soap stock. Start the soap stock pump 2. The soap stock pump 2 transports the softened soap stock into the metering and mixing tank 5. The metering and mixing tank 5 measures the volume and weight of the soap stock, and adds the zinc chloride catalyst into the metering and mixing tank 5. The weight ratio of the catalyst to the soap stock is 1:250. Start the lye pump 4. The lye pump 4 transports the 25% sodium hydroxide solution in the lye tank 3 into the metering and mixing tank 5. According to the volume ratio of the soap stock to the sodium hydroxide solution being 1:3, start the stirring device of the metering and mixing tank 5 during the feeding process, and at the same time introduce deoxidized steam into the heating medium channel of the metering and mixing tank 5 to preheat the materials with the deoxidized steam. The materials are stirred and mixed evenly in the metering and mixing tank 5, and then start the metering and conveying pump 6 to transport the evenly mixed materials into the reaction tank 7.

[0052] Open the control valve on the pipeline connecting the reaction tank 7 and the deoxidized steam pipeline 38, and introduce deoxidized steam into the heating medium channel of the reaction tank 7 and the inner cavity of the reaction tank 7. Use the deoxidized steam to heat the materials in the reaction tank 7, heat the materials to 135°C and then keep them warm. The deoxidized steam entering the inner cavity of the reaction tank 7 causes the pressure in the reaction tank 7 to rise. When the pressure rises to 0.4 MPa, keep the pressure. The reaction tank 7 is equipped with a temperature sensor and a pressure sensor, and the opening and closing of the valve are controlled through the temperature sensor and the pressure sensor, so that the reaction temperature of the reaction tank 7 is controlled at about 135°C, and the reaction pressure always remains at about 0.4 MPa. Start the stirring device of the reaction tank 7 to stir the materials. The materials mixed evenly in the metering and mixing tank 5 are in the reaction tank 7. Under the conditions of a reaction temperature of 135°C and a reaction pressure of 0.4 MPa, a saponification hydrolysis reaction occurs. The oil in the soap stock reacts with sodium hydroxide to form sodium fatty acid and glycerol. The oryzanol in the soap stock forms sodium ferulate under high temperature, high pressure, catalyst catalysis and alkaline conditions. Sodium ferulate exists in the solution, and sodium fatty acid is in a solid phase. Both the solid phase and the liquid phase are transported to the settling tank 9 under the action of the reaction product transfer pump 8 for heat preservation and sedimentation.

[0053] Open the control valves on the pipelines connecting the settling tank 9 and the settling buffer tank 10 with the deoxidized steam pipeline 38, and introduce deoxidized steam into the heat preservation medium channels of the settling tank 9 and the settling buffer tank 10. Use the deoxidized steam to keep the saponification reaction products in the settling tank 9 warm. The heat preservation temperature is 130°C. The settling tank 9 is equipped with a temperature sensor, and the opening and closing of the valve are controlled through the temperature sensor. In the settling tank 9, the saponification reaction products settle, so that the aqueous saponification solution and the solid soap residue in the saponification reaction products are separated. The aqueous saponification solution is located at the lower part, and the solid soap residue floats on the surface of the aqueous phase. Start the aqueous phase transfer pump 11 and the buffer pump 12. The aqueous saponification solution in the settling tank 9 is transported to the primary acid precipitation tank 17 under the action of the aqueous phase transfer pump 11. The fixed soap residue enters the settling buffer tank 10 under the action of the buffer pump 12 for re-sedimentation to separate the residual aqueous saponification solution in the solid soap residue. The separated saponification solution also enters the primary acid precipitation tank 17 under the action of the aqueous phase transfer pump 11. The solid soap residue is discharged as waste under the action of the solid phase transfer pump 13.

[0054] Start the acid pump 15 to transfer the dilute sulfuric acid with a concentration of 30 - 40% in the acid storage tank 14 to the primary acid precipitation tank 17. Start the stirring device of the primary acid precipitation tank 17 to stir, and adjust the pH value of the saponification solution in the primary acid precipitation tank 17. When the pH value of the saponification solution reaches the requirement of primary acid precipitation, turn off the acid pump 15. Then add activated carbon into the primary acid precipitation tank 17 through the activated carbon pipeline 40. Control the valve on the pipeline connecting the primary acid precipitation tank 17 and the deoxidized steam pipe or the valve on the pipeline connecting the primary acid precipitation tank 17 and the cooling water pipeline 44 according to the temperature measured by the temperature sensor on the primary acid precipitation tank 17, and adjust the temperature of the saponification solution in the primary acid precipitation tank 17 to keep the saponification solution at the designed primary acid precipitation temperature. Sodium ferulate in the saponification solution reacts with dilute sulfuric acid to produce ferulic acid and sodium sulfate. Sodium sulfate itself is soluble in water, and ferulic acid is soluble in hot water. Therefore, the reaction product is the primary acid precipitation solution, and the activated carbon in the solution adsorbs impurities such as pigments in the solution. The primary acid precipitation solution is transported to the primary filtration device 19 under the action of the primary acid precipitation pump 18.

[0055] The primary filtration device 19 is a diaphragm filter. The primary acid precipitation solution is filtered through the diaphragm filter to obtain clear liquid and turbid liquid. The turbid liquid contains activated carbon, glycerol and some impurities, and the clear liquid contains ferulic acid, sodium sulfate, pigments and a small amount of impurities. The clear liquid enters the primary clear liquid tank 20 for storage, and the turbid liquid enters the primary turbid liquid tank 22 for storage. Start the valves on the pipelines connecting the primary clear liquid tank 20 and the primary turbid liquid tank 22 to the deoxidized steam pipeline 38, and introduce deoxidized steam into the heat preservation medium channels of the primary clear liquid tank 20 and the primary turbid liquid tank 22 to keep the temperature of the solution and the turbid liquid. Start the primary clear liquid pump 21 to transfer the clear liquid in the primary clear liquid tank 20 to the secondary acid precipitation tank 24, and start the primary turbid liquid pump 23 to discharge waste.

[0056] Start the acid pump 15 to add dilute sulfuric acid with a concentration of 30 - 40% into the secondary acid precipitation tank 24, adjust the pH value of the clear liquid in the secondary acid precipitation tank 24 to the requirement of secondary acid precipitation, open the valve connecting the secondary acid precipitation tank 24 to the chilled water pipeline 45 or the cooling water pipeline 44, and introduce chilled water or cooling water into the temperature control medium channel of the secondary acid precipitation tank 24 to adjust the temperature of the clear liquid in the secondary acid precipitation tank 24 to the secondary acid precipitation temperature, so that the clear liquid undergoes secondary acid precipitation under acidic and low-temperature conditions. Utilize the condition that ferulic acid is insoluble in cold water and acid to precipitate ferulic acid from the clear liquid. Start the secondary acid precipitation pump 25 to transfer the secondary acid precipitation solution after secondary acid precipitation to the secondary filtration device 26. The secondary filtration device 26 uses a pull-bag centrifuge. Under the action of the pull-bag centrifuge, the secondary acid precipitation solution after secondary acid precipitation is centrifugally filtered to obtain filter residue and filtrate. The filtrate is transported to the sewage treatment system for sewage treatment, and the filter residue is crude ferulic acid.

[0057] Transfer the crude ferulic acid to the hot dissolution tank 27, add hot soft water into the hot dissolution tank 27 through the hot soft water pipeline, start the stirring device of the hot dissolution tank 27 to fully dissolve the crude ferulic acid in the hot soft water, then add activated carbon into the hot dissolution tank 27 through the activated carbon pipeline 40. The activated carbon adsorbs impurities such as pigments in the solution. Open the valve on the pipeline connecting the hot dissolution tank 27 and the deoxygenated steam pipeline 38, and use the deoxygenated steam to control the temperature of the solution in the hot dissolution tank 27 to obtain a hot dissolved solution.

[0058] Start the hot dissolution pump 28 to transfer the hot dissolved solution to the three - stage filtration device 29. The three - stage filtration device 29 uses a diaphragm filter to obtain a hot dissolved clear liquid and a hot dissolved turbid liquid. The hot dissolved turbid liquid contains activated carbon, and the hot dissolved clear liquid contains ferulic acid and a small amount of sodium sulfate impurities. The hot dissolved clear liquid enters the three - stage clear liquid tank 30 for storage, and the hot dissolved turbid liquid enters the three - stage turbid liquid tank 32 for storage. Open the valves on the pipelines connecting the three - stage clear liquid tank 30 and the three - stage turbid liquid tank 32 to the deoxygenated steam pipeline 38, and introduce deoxygenated steam into the heat - preservation medium channels of the three - stage clear liquid tank 30 and the three - stage turbid liquid tank 32 to maintain the temperature of the hot dissolved clear liquid and the hot dissolved turbid liquid. Start the three - stage clear liquid pump 31 to transfer the hot dissolved clear liquid in the three - stage clear liquid tank 30 to the cooler 34, and start the three - stage turbid liquid pump 33 to discharge waste.

[0059] In the cooler 34, the hot dissolved clear liquid exchanges heat with the chilled water, and the hot dissolved clear liquid cools down. The cooled clear liquid enters the cold precipitation tank 35. Start the vacuum pump 46 to extract the vacuum in the cold precipitation tank 35. Open the valve on the pipeline connecting the cold precipitation tank 35 to the chilled water pipeline 45 or the cooling water pipeline 44, so that the clear liquid in the cold precipitation tank 35 stands still and precipitates under low - temperature conditions. Utilize the characteristic that ferulic acid is insoluble in cold water to precipitate the ferulic acid in the clear liquid to obtain a cold - precipitated liquid. During the cold precipitation process, control the temperature - controlling medium entering the temperature - controlling medium channel through the temperature sensor and valve of the cold precipitation tank 35 to keep the clear liquid in the cold precipitation tank 35 at the low temperature required for cold precipitation. After cold precipitation is completed, start the cold precipitation pump 36. Under the action of the cold precipitation pump 36, the cold - precipitated liquid enters the four - stage filtration device 37. The four - stage filtration device 37 uses a pull - bag centrifuge. Under the action of the pull - bag centrifuge, the cold - precipitated liquid is centrifugally filtered to obtain filter residue and filtrate. The filtrate is transported to the sewage treatment system for sewage treatment, and the filter residue is the finished product of ferulic acid. The filter residue is transported to the drying device 48 for drying and then packaged to obtain the dried finished product of ferulic acid.

[0060] It should be noted that the above - mentioned embodiments are illustrative rather than restrictive of the technical solutions of the present invention. Equivalent replacements by those of ordinary skill in the art or other modifications made according to the prior art, as long as they do not exceed the idea and scope of the technical solutions of the present invention, should be included within the scope of the rights required by the present invention.

Claims

1. A production device for producing ferulic acid with rice bran oil soapstock as the raw material, characterized in that: It includes a reaction tank (7), a sedimentation separation device, and an acid precipitation and filtration device that are connected in sequence. The reaction tank (7) has an inner cavity for material reaction, a feed port, a discharge port, and an air inlet that are connected to the inner cavity, a stirring device for stirring the material, and a heating medium channel for heating the material. The material enters the inner cavity from the feed port. The heating medium channel is connected to the deoxidized steam pipeline (38), and the air inlet is connected to the deoxidized steam pipeline (38). The discharge port of the reaction tank (7) is connected to the sedimentation separation device through a pipeline. The described sedimentation separation device has: A sedimentation tank (9) whose feed port is connected to the discharge port of the reaction tank (7). The sedimentation tank (9) has a solid phase outlet and an aqueous phase outlet. The aqueous phase outlet is connected to the acid precipitation and filtration device through a pipeline, and the solid phase outlet is connected to the waste discharge device through a pipeline. The sedimentation tank (9) has a heat preservation medium channel for heat preservation, and the heat preservation medium channel is connected to the deoxidized steam pipeline (38). The described acid precipitation and filtration device includes: A primary acid precipitation tank (17) whose feed port is connected to the aqueous phase outlet of the sedimentation tank (9) through a pipeline. The discharge port of the primary acid precipitation tank (17) is connected to the feed port of the primary filtration device (19) through a pipeline. The primary acid precipitation tank (17) has an acid inlet, an activated carbon inlet, a temperature control medium channel, and a stirring device for stirring. The acid inlet is connected to the acid liquid storage tank (14) through an acid inlet pipeline (16), the activated carbon inlet is connected to the activated carbon pipeline (40), and the control medium channel is connected to the cooling water pipeline (44) and the deoxidized steam pipeline (38). A primary filtration device (19) that has a clear liquid outlet and a turbid liquid outlet. The clear liquid outlet is connected to the feed port of the secondary acid precipitation tank (24) through a pipeline, and the turbid liquid outlet is connected to the waste discharge device through a pipeline. A secondary acid precipitation tank (24) whose discharge port is connected to the feed port of the secondary filtration device (26) through a pipeline. The secondary acid precipitation tank (24) has an acid inlet and a temperature control medium channel. The acid inlet is connected to the acid liquid storage tank (14) through an acid inlet pipeline (16), the activated carbon inlet is connected to the activated carbon pipeline (40), and the temperature control medium channel is connected to the chilled water pipeline (45) and the cooling water pipeline (44). A secondary filtration device (26) that has a filter residue outlet and a filtrate outlet. The filtrate outlet is connected to the sewage treatment device, and the filter residue flowing out from the filter residue outlet is the crude ferulic acid.

2. The production equipment for producing ferulic acid from rice bran oil soapstock according to claim 1, characterized in that: It further includes a purification device, and the described purification device includes: A hot dissolution tank (27) whose feed port is connected to the filter residue outlet of the secondary filtration device (26) through a pipeline. The hot dissolution tank (27) has a hot soft water inlet and an activated carbon inlet that are connected to its inner cavity, a heating medium channel for heating, and a stirring device for stirring. The hot soft water inlet is connected to the hot soft water pipeline, the activated carbon inlet is connected to the activated carbon pipeline (40), and the heating medium channel is connected to the deoxidized steam pipeline (38). A tertiary filtration device (29) whose feed port is connected to the discharge port of the hot dissolution tank (27) through a pipeline. The tertiary filtration device (29) has a clear liquid outlet and a turbid liquid outlet. The clear liquid outlet is connected to the feed port of the cold precipitation tank (35) through a pipeline, and the turbid liquid outlet is connected to the waste discharge device through a pipeline. Cold crystallization tank (35), whose discharge port is connected to the four - stage filtration device (37) through a pipeline. The cold crystallization tank (35) has a vacuum outlet and a temperature - controlled medium channel. The vacuum outlet is connected to the inlet of a vacuum pump (46) through a pipeline, and the outlet of the vacuum pump (46) is vented. The temperature - controlled medium channel is connected to a cooling water pipeline (44) and a chilled water pipeline (45). Four - stage filtration device (37), which has a filter residue outlet and a filtrate outlet. The filter residue outlet is connected to a drying device (48), and the filtrate outlet is connected to a sewage treatment system.

3. The production equipment for producing ferulic acid with rice bran oil soapstock as the raw material according to claim 2, wherein: The purification device further includes a cooler (34). The cooler (34) is a plate heat exchanger. The feed inlet of the cooler (34) is connected to the clear liquid outlet of the three - stage filtration device (29), and the discharge outlet of the cooler (34) is connected to the feed inlet of the cold crystallization tank (35) through a pipeline. The cooling medium inlet of the cooler (34) is connected to the chilled water pipeline (45).

4. The production equipment for producing ferulic acid with rice bran oil soapstock as the raw material according to claim 2, characterized in that: It also includes a three - stage clear liquid tank (30). The clear liquid outlet of the three - stage filtration device (29) is connected to the feed inlet of the three - stage clear liquid tank (30) through a pipeline. The discharge outlet of the three - stage clear liquid tank (30) is connected to the feed inlet of the cold crystallization tank (35) through a three - stage clear liquid pump (31) and a pipeline. The three - stage clear liquid tank (30) has a heat - preservation medium channel for heat preservation, and the heat - preservation medium channel is connected to a deoxidized steam pipeline (38).

5. The production equipment for producing ferulic acid with rice bran oil soapstock as the raw material according to claim 1, characterized in that: It also includes a metering and mixing device, and the metering and mixing device includes: Foots oil tank (1), whose discharge port is connected to the feed inlet of a metering and mixing tank (5) through a pipeline. The foots oil tank (1) has a heat - medium channel for heating the foots oil to soften it, and the heat - medium channel is connected to a deoxidized steam pipeline (38). Caustic solution tank (3), whose discharge port is connected to the feed inlet of a metering and mixing tank (5) through a pipeline. Metering and mixing tank (5), whose discharge port is connected to the feed inlet of a reaction tank (7) through a pipeline. The metering and mixing tank (5) has a heat - medium channel for heating the materials and a stirring device, and the heat - medium channel is connected to a deoxidized steam pipeline (38).

6. The production equipment for producing ferulic acid with rice bran oil soapstock as the raw material according to claim 1, characterized in that: It also includes a sedimentation buffer tank (10). The feed inlet of the sedimentation buffer tank (10) is connected to the solid - phase outlet of a sedimentation tank (9) through a pipeline and a buffer pump (12). The sedimentation buffer tank (10) has a solid - phase outlet, an aqueous - phase outlet and a heat - preservation medium channel. The heat - preservation medium channel is connected to a deoxidized steam pipeline (38). The aqueous - phase outlet of the sedimentation buffer tank (10) is connected to the feed inlet of a primary acid precipitation tank (17), and the solid - phase outlet of the sedimentation buffer tank (10) is connected to a waste discharge device through a solid - phase delivery pump (13).

7. The production equipment for producing ferulic acid with rice bran oil soapstock as the raw material according to claim 1, characterized in that: It also includes a primary clear liquid tank (20). The clear liquid outlet of the primary filtration device (19) is connected to the feed inlet of the primary clear liquid tank (20) through a pipeline. The discharge outlet of the primary clear liquid tank (20) is connected to the feed inlet of a secondary acid precipitation tank (24) through a primary clear liquid pump (21) and a pipeline. The primary clear liquid tank (20) has a heat - preservation medium channel for heat preservation, and the heat - preservation medium channel is connected to a deoxidized steam pipeline (38).

8. The production equipment for producing ferulic acid with rice bran oil soapstock as the raw material according to claim 1, characterized in that: A reaction product transfer pump (8) is provided on the pipeline connecting the discharge port of the reaction tank (7) and the feed port of the settling tank (9). A water phase transfer pump (11) is provided on the pipeline connecting the water phase outlet of the settling tank (9) and the feed port of the primary acid precipitation tank (17). A primary acid precipitation pump (18) is provided on the pipeline connecting the discharge port of the primary acid precipitation tank (17) and the feed port of the primary filtration device (19). A secondary acid precipitation pump (25) is provided on the pipeline connecting the discharge port of the secondary acid precipitation tank (24) and the feed port of the secondary filtration device (26). A hot dissolution pump (28) is provided on the pipeline connecting the discharge port of the hot dissolution tank (27) and the feed port of the tertiary filtration device (29). A cold precipitation pump (36) is provided on the pipeline connecting the discharge port of the cold precipitation tank (35) and the feed port of the quaternary filtration device (37).

9. The production equipment for producing ferulic acid from rice bran oil soapstock according to claim 1 or 2, characterized in that: The primary filtration device (19) and the tertiary filtration device (29) are both diaphragm filters, and the secondary filtration device (26) and the quaternary filtration device (37) are both pull-bag centrifuges.

10. The production equipment for producing ferulic acid from rice bran oil soapstock according to any one of claims 1 to 8, characterized in that: It further includes a condensate water system. The condensate water system includes a condensate water recovery pipeline (39), a condensate water tank (41) and a condensate water pump (42). The condensate water recovery pipeline (39) is respectively connected to the heating medium channels of the soap stock tank (1), the metering and mixing tank (5), the reaction tank (7), the heat preservation medium channel of the settling tank (9), the heat preservation medium channel of the settling buffer tank (10), the temperature control medium channel of the primary acid precipitation tank (17), the heating medium channel of the hot dissolution tank (27), the heat preservation medium channel of the primary clear liquid tank (20) and the heat preservation medium channel of the tertiary clear liquid tank (30). The condensate water recovery pipeline (39) is connected to the water inlet of the condensate water tank (41). The water outlet of the condensate water tank (41) is respectively connected to the water inlet of the boiler (47) device and the water inlet of the hot soft water tank (43) through the condensate water pump (42) by pipelines. The hot soft water tank (43) has a heating medium channel, and the heating medium channel is connected to the deoxidized steam pipeline (38) and the condensate water recovery pipeline (39). The hot soft water tank (43) heats the condensate water with deoxidized steam to generate hot soft water. The boiler (47) device heats the condensate water to evaporate and generate deoxidized steam, and the deoxidized steam outlet of the boiler (47) device is connected to the deoxidized steam pipeline (38).

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