Continuous automatic precise feeding system for preparing dimethyl sulfoxide

Abstract

The utility model discloses a continuous automatic precise feeding system for preparing dimethyl sulfoxide, and relates to the technical field of dangerous chemical process synthesis. The equipment comprises a first input pipeline, a solvent buffer tank, a first precise automatic weighing scale, a first micro-filter, a first automatic mass flow meter, a first bypass pipeline, a first one-way check valve, a second one-way check valve, a second input pipeline, an oxidant buffer tank, a second precise automatic weighing scale, a second micro-filter and a second automatic mass flow meter. The system comprises a first input pipeline, a second bypass pipeline, a third one-way check valve, a fourth one-way check valve, a third input pipeline, a dimethyl sulfide buffer tank, a third precise automatic weighing scale, a third micro-filter, a third automatic mass flow meter, a third bypass pipeline, a fifth one-way check valve, a DMSO reaction system and a DCS control system. The dimethyl sulfide conversion rate and the effective utilization rate of the oxidizing agent are improved, continuous and automatic DMSO feeding is achieved, and potential safety hazards and labor cost of feeding are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of hazardous chemical process synthesis, and in particular to a continuous automated precision feeding system for preparing dimethyl sulfoxide. Background Art

[0002] Dimethyl sulfoxide (DMSO) is a sulfur-containing organic compound that is a colorless, transparent liquid at room temperature. It has the characteristics of high polarity, high hygroscopicity, flammability, and a high-boiling-point aprotic nature. DMSO is soluble in water, ethanol, solvents, ether, and chloroform. It is a highly polar, inert solvent and is widely used as a solvent and reaction reagent. Furthermore, DMSO has a highly selective extraction ability and can be used as an extraction solvent for the separation of alkanes and aromatic hydrocarbons. In addition, DMSO can also be used as a capacitor dielectric, antifreeze, brake fluid, and rare metal extractant.

[0003] In related technologies, dimethyl sulfide is produced by oxidizing dimethyl sulfide with an oxidant. This process does not use a catalyst. The oxidant and dimethyl sulfide are mixed, reacted in a six-stage tubular reactor, and the temperature of each stage is strictly controlled to ultimately produce dimethyl sulfoxide. However, this method suffers from low dimethyl sulfide conversion rates and low oxidant utilization rates. There is an excess of oxidant, which can easily lead to further oxidation of dimethyl sulfone to dimethyl sulfone. Furthermore, the amounts of oxidant and dimethyl sulfide cannot be precisely controlled, leading to excessive use of oxidant or dimethyl sulfide, which can lead to material waste and increase the production cost of dimethyl sulfoxide. Furthermore, this method does not meet the policy requirement that hazardous processes must be fully continuous and automated. Utility Model Content

[0004] The present application aims to address at least one of the technical problems existing in the prior art. To this end, the present application proposes a continuous, automated, and precise dosing system for the preparation of dimethyl sulfoxide (DMSO). This system improves the conversion rate of dimethyl sulfide (DMSO) and the effective utilization rate of the oxidant, while also enabling continuous, automated dosing of DMSO and reducing safety hazards and labor costs.

[0005] The present application provides a continuous automated precision feeding system for preparing dimethyl sulfoxide, comprising: a first input pipeline, a solvent buffer tank, a first precision automatic weighing scale, a first precision pump, a first microfilter, a first automatic mass flowmeter, a first bypass pipeline, a first one-way check valve, a second one-way check valve, a second input pipeline, an oxidant buffer tank, a second precision automatic weighing scale, a second precision pump, a second microfilter, a second automatic mass flowmeter, a second bypass pipeline, a third one-way check valve, a fourth one-way check valve, a third input pipeline, a dimethyl sulfide buffer tank, a third precision automatic weighing scale, a third precision pump, a third microfilter, a third automatic mass flowmeter, a third bypass pipeline, a fifth one-way check valve, a sixth one-way check valve, a DMSO reaction system, and a DCS control system;

[0006] The first precision automatic weighing scale is arranged at the bottom of the solvent buffer tank, the input end of the solvent buffer tank is connected to the output end of the first input pipeline, the first output end of the solvent buffer tank is connected to the input end of the first microfilter, the output end of the first microfilter is connected to the DMSO reaction system, the first automatic mass flowmeter is communicated with the output end of the first microfilter, and the first automatic mass flowmeter is arranged between the first microfilter and the DMSO reaction system, the first input pipeline is used to transport the solvent into the solvent buffer tank, the first one-way check valve and the second one-way check valve are both arranged on the first bypass pipeline, one end of the first bypass pipeline is connected to the second output end of the solvent buffer tank, and the other end of the first bypass pipeline is connected to the pipeline between the first automatic mass flowmeter and the DMSO reaction system, the first one-way check valve is used to control the fluid in the first bypass pipeline to flow in the direction of the DMSO reaction system, and the second one-way check valve is used to control the fluid in the first bypass pipeline to flow in the direction of the solvent buffer tank;

[0007] The second precision automatic weighing scale is arranged at the bottom of the oxidant buffer tank, the input end of the oxidant buffer tank is connected to the output end of the second input pipeline, the first output end of the oxidant buffer tank is connected to the input end of the second microfilter, the output end of the second microfilter is connected to the DMSO reaction system, the second automatic mass flowmeter is communicated with the output end of the second microfilter, and the second automatic mass flowmeter is arranged between the second microfilter and the DMSO reaction system, the second input pipeline is used to transport the oxidant to the oxidant buffer tank, the third one-way check valve and the fourth one-way check valve are both arranged on the second bypass line, one end of the second bypass line is connected to the second output end of the oxidant buffer tank, and the other end of the second bypass line is connected to the pipeline between the second automatic mass flowmeter and the DMSO reaction system, the third one-way check valve is used to control the fluid in the second bypass line to flow in the direction of the DMSO reaction system, and the fourth one-way check valve is used to control the fluid in the second bypass line to flow in the direction of the oxidant buffer tank;

[0008] The third precise automatic weighing scale is provided at the bottom of the dimethyl sulfide buffer tank, the input end of the dimethyl sulfide buffer tank is connected to the output end of the third input pipeline, the first output end of the dimethyl sulfide buffer tank is connected to the input end of the third microfilter, the output end of the third microfilter is connected to the DMSO reaction system, the third automatic mass flow meter is communicated with the output end of the third microfilter, and the third automatic mass flow meter is provided between the third microfilter and the DMSO reaction system, the third input pipeline is used to input dimethyl sulfide into the reaction system. sent to the dimethyl sulfide buffer tank, the fifth one-way check valve and the sixth one-way check valve are both provided on the third bypass line, one end of the third bypass line is connected to the second output end of the dimethyl sulfide buffer tank, and the other end of the third bypass line is connected to the pipeline between the third automatic mass flowmeter and the DMSO reaction system, the fifth one-way check valve is used to control the fluid in the third bypass line to flow in the direction of the DMSO reaction system, and the sixth one-way check valve is used to control the fluid in the third bypass line to flow in the direction of the dimethyl sulfide buffer tank;

[0009] The DCS control system is respectively connected to the first precision automatic weighing scale, the first automatic mass flowmeter, the second precision automatic weighing scale, the second automatic mass flowmeter, the third precision automatic weighing scale, and the third automatic mass flowmeter; the solvent buffer tank, the oxidant buffer tank and the dimethyl sulfide buffer tank are all provided with liquid level automatic detection instruments, and the DCS control system is connected to each of the liquid level automatic detection instruments. The first precision automatic weighing scale is arranged at the bottom of the solvent buffer tank, the input end of the solvent buffer tank is connected to the output end of the first input pipeline, the first output end of the solvent buffer tank is connected to the input end of the first precision pump, the output end of the first precision pump is connected to the input end of the first microfilter, and the output end of the first microfilter is connected to The DMSO reaction system, the first automatic mass flowmeter is connected to the output end of the first microfilter, and the first automatic mass flowmeter is arranged between the first microfilter and the DMSO reaction system, the first input pipeline is used to transport the solvent to the solvent buffer tank, the first one-way check valve and the second one-way check valve are both arranged on the first bypass pipeline, one end of the first bypass pipeline is connected to the second output end of the solvent buffer tank, and the other end of the first bypass pipeline is connected to the pipeline between the first automatic mass flowmeter and the DMSO reaction system, the first one-way check valve is used to control the fluid in the first bypass pipeline to flow in the direction of the DMSO reaction system, and the second one-way check valve is used to control the fluid in the first bypass pipeline to flow in the direction of the solvent buffer tank;

[0010] The second precision automatic weighing scale is arranged at the bottom of the oxidant buffer tank, the input end of the oxidant buffer tank is connected to the output end of the second input pipeline, the first output end of the oxidant buffer tank is connected to the input end of the second precision pump, the output end of the second precision pump is connected to the input end of the second microfilter, the output end of the second microfilter is connected to the DMSO reaction system, the second automatic mass flowmeter is communicated with the output end of the second microfilter, and the second automatic mass flowmeter is arranged between the second microfilter and the DMSO reaction system, the second input pipeline is used to transport the oxidant to the oxidant buffer tank, the third one-way check valve and the fourth one-way check valve are both arranged on the second bypass line, one end of the second bypass line is connected to the second output end of the oxidant buffer tank, and the other end of the second bypass line is connected to the pipeline between the second automatic mass flowmeter and the DMSO reaction system, the third one-way check valve is used to control the fluid in the second bypass line to flow in the direction of the DMSO reaction system, and the fourth one-way check valve is used to control the fluid in the second bypass line to flow in the direction of the oxidant buffer tank;

[0011] The third precision automatic weighing scale is arranged at the bottom of the dimethyl sulfide buffer tank, the input end of the dimethyl sulfide buffer tank is connected to the output end of the third input pipeline, the first output end of the dimethyl sulfide buffer tank is connected to the input end of the third precision pump, the output end of the third precision pump is connected to the input end of the third microfilter, the output end of the third microfilter is connected to the DMSO reaction system, the third automatic mass flow meter is connected to the output end of the third microfilter, and the third automatic mass flow meter is arranged between the third microfilter and the DMSO reaction system, the third The input pipeline is used to transport dimethyl sulfide to the dimethyl sulfide buffer tank. The fifth one-way check valve and the sixth one-way check valve are both provided on the third bypass pipeline. One end of the third bypass pipeline is connected to the second output end of the dimethyl sulfide buffer tank, and the other end of the third bypass pipeline is connected to the pipeline between the third automatic mass flow meter and the DMSO reaction system. The fifth one-way check valve is used to control the fluid in the third bypass pipeline to flow in the direction of the DMSO reaction system, and the sixth one-way check valve is used to control the fluid in the third bypass pipeline to flow in the direction of the dimethyl sulfide buffer tank.

[0012] The DCS control system is respectively connected to the first precision automatic weighing scale, the first automatic mass flowmeter, the first precision pump, the first one-way check valve, the second one-way check valve, the second precision automatic weighing scale, the second automatic mass flowmeter, the first precision pump, the first one-way check valve, the second one-way check valve, the third precision automatic weighing scale, the third automatic mass flowmeter, the first precision pump, the first one-way check valve, and the second one-way check valve.

[0013] According to some embodiments of the present application, the solvent buffer tank, the oxidant buffer tank, and the dimethyl sulfide buffer tank are all provided with automatic liquid level detection instruments, and the DCS control system is connected to each of the automatic liquid level detection instruments.

[0014] According to some embodiments of the present application, the continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a first cooling water circulation loop and a first circulating water storage tank. The first circulating water storage tank is arranged on the first cooling water circulation loop. One end of the first cooling water circulation loop is connected to the solvent buffer tank through the circulating water input port in the solvent buffer tank, and the other end of the first cooling water circulation loop is connected to the solvent buffer tank through the circulating water output port in the solvent buffer tank.

[0015] According to some embodiments of the present application, the continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a second cooling water circulation loop and a second circulating water storage tank, the second circulating water storage tank is arranged on the second cooling water circulation loop, one end of the second cooling water circulation loop is connected to the oxidant buffer tank through the circulating water input port in the oxidant buffer tank, and the other end of the second cooling water circulation loop is connected to the oxidant buffer tank through the circulating water output port in the oxidant buffer tank.

[0016] According to some embodiments of the present application, the continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a third cooling water circulation loop and a third circulating water storage tank. The third circulating water storage tank is arranged on the third cooling water circulation loop. One end of the third cooling water circulation loop is connected to the dimethyl sulfide buffer tank through the circulating water inlet in the dimethyl sulfide buffer tank, and the other end of the third cooling water circulation loop is connected to the dimethyl sulfide buffer tank through the circulating water outlet in the dimethyl sulfide buffer tank.

[0017] According to some embodiments of the present application, the continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a solvent delivery pipeline and a first control valve, the input end of the solvent delivery pipeline is connected to the first output end of the solvent buffer tank, the output end of the solvent delivery pipeline is connected to the DMSO reaction system, the first microfilter and the first automatic mass flow meter are both arranged on the solvent delivery pipeline and connected to the solvent delivery pipeline, the first control valve is arranged on the solvent delivery pipeline, and the first control valve is arranged between the output end of the first bypass line and the DMSO reaction system, and the first control valve is connected to the DCS control system.

[0018] According to some embodiments of the present application, the continuous automated precision feeding system for preparing dimethyl sulfoxide also includes an oxidant delivery pipeline and a second control valve, the input end of the oxidant delivery pipeline is connected to the first output end of the oxidant buffer tank, the output end of the oxidant delivery pipeline is connected to the DMSO reaction system, the second microfilter and the second automatic mass flowmeter are both arranged on the oxidant delivery pipeline and connected to the oxidant delivery pipeline, the second control valve is arranged on the oxidant delivery pipeline, and the second control valve is arranged between the output end of the second bypass line and the DMSO reaction system, and the second control valve is connected to the DCS control system.

[0019] According to some embodiments of the present application, the continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a dimethyl sulfide delivery pipeline and a third control valve, the input end of the dimethyl sulfide delivery pipeline is connected to the first output end of the dimethyl sulfide buffer tank, the output end of the dimethyl sulfide delivery pipeline is connected to the DMSO reaction system, the third microfilter and the third automatic mass flowmeter are both arranged on the dimethyl sulfide delivery pipeline and connected to the dimethyl sulfide delivery pipeline, the third control valve is arranged on the dimethyl sulfide delivery pipeline, and the third control valve is arranged between the output end of the third bypass line and the DMSO reaction system, and the third control valve is connected to the DCS control system.

[0020] According to some embodiments of the present application, the continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a first nitrogen input pipeline and a first nitrogen output pipeline, the output end of the first nitrogen input pipeline is connected to the solvent buffer tank through the nitrogen input port on the solvent buffer tank, and the solvent buffer tank is connected to the first nitrogen output pipeline through the nitrogen output port on the solvent buffer tank.

[0021] According to some embodiments of the present application, the continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a second nitrogen input pipeline and a second nitrogen output pipeline, the output end of the second nitrogen input pipeline is connected to the oxidant buffer tank through the nitrogen input port on the oxidant buffer tank, and the oxidant buffer tank is connected to the second nitrogen output pipeline through the nitrogen output port on the oxidant buffer tank.

[0022] In the present application, the DCS control system continuously controls the first precision pump to transport the solvent in the solvent buffer tank from the first microfilter to the DMSO reaction system according to the preset material ratio, that is, the solvent is successively transported to the DMSO reaction system through the first input pipeline, the solvent buffer tank and the first microfilter. The first input pipeline is used to transport the solvent to the solvent buffer tank, and the solvent buffer tank is used to temporarily store the solvent transported from the first input pipeline. The first precision automatic weighing scale is used to perform real-time detection of the weight of the solvent in the solvent buffer tank and generate a first weight difference detection signal, and send the first weight difference detection signal to the DCS control system. The first microfilter is used to filter impurities from the solvent transported from the solvent buffer tank; the first automatic mass flowmeter is used to perform real-time detection of the mass of the solvent fluid transported from the first microfilter and generate a first mass detection signal, and send the first mass detection signal to the DCS control system. The DCS control system is used to compare the first weight difference detection signal with the numerical value corresponding to the first mass detection signal, so that an interlocked calibration function is formed between the first precision automatic weighing scale and the first automatic mass flowmeter, thereby further improving the accuracy of solvent quality detection; DCS control The control system continuously controls the second precision pump to transport the oxidant in the oxidant buffer tank from the second microfilter to the DMSO reaction system according to the preset material ratio, that is, the oxidant is successively transported to the DMSO reaction system through the second input pipeline, the oxidant buffer tank and the second microfilter. The second input pipeline is used to transport the oxidant to the oxidant buffer tank, and the oxidant buffer tank is used to temporarily store the oxidant transported from the second input pipeline. The second precision automatic weighing scale is used to detect the weight of the oxidant in the oxidant buffer tank in real time and generate a second weight difference detection signal, and the second weight difference detection signal is used to detect the weight of the oxidant in the oxidant buffer tank in real time. The second microfilter is used to filter impurities from the oxidant delivered from the oxidant buffer tank; the second automatic mass flowmeter is used to detect the mass of the oxidant fluid delivered from the second microfilter in real time and generate a second mass detection signal, and send the second mass detection signal to the DCS control system. The DCS control system is used to compare the second weight difference detection signal with the value corresponding to the second mass detection signal, so that an interlocked calibration function is formed between the second precision automatic weighing scale and the second automatic mass flowmeter, thereby further improving the accuracy of the oxidant quality detection;The DCS control system continuously controls the third precision pump to transport the dimethyl sulfide in the dimethyl sulfide buffer tank from the third microfilter to the DMSO reaction system according to the preset material ratio, that is, dimethyl sulfide is successively transported to the DMSO reaction system through the third input pipeline, the dimethyl sulfide buffer tank and the third microfilter. The third input pipeline is used to transport dimethyl sulfide to the dimethyl sulfide buffer tank, and the dimethyl sulfide buffer tank is used to temporarily store the dimethyl sulfide transported from the third input pipeline. The third precision automatic weighing scale is used to detect the weight of the dimethyl sulfide in the dimethyl sulfide buffer tank in real time and generate a third weight difference detection signal, and the third The weight difference detection signal is sent to the DCS control system. The third microfilter is used to filter impurities from the dimethyl sulfide delivered from the dimethyl sulfide buffer tank. The third automatic mass flowmeter is used to detect the mass of the dimethyl sulfide fluid delivered from the third microfilter in real time and generate a third mass detection signal. This third mass detection signal is then sent to the DCS control system. The DCS control system is used to compare the third weight difference detection signal with the value corresponding to the third mass detection signal. This creates an interlocked calibration function between the third precision automatic weighing scale and the third automatic mass flowmeter, further improving the accuracy of dimethyl sulfide quality detection. This configuration improves the conversion rate of dimethyl sulfide and the effective utilization rate of the oxidant, while also enabling continuous automated dosing of DMSO and reducing safety hazards and labor costs.

[0023] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Additional aspects and advantages of the present application will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0025] Figure 1 This is a schematic diagram of the structure of a continuous automated precision feeding system for preparing dimethyl sulfoxide provided in an embodiment of the present application.

[0026] Reference numerals:

[0027] First input pipeline 100, solvent buffer tank 110, first precision automatic weighing scale 120, first microfilter 130, first automatic mass flowmeter 140, first bypass pipeline 151, first one-way check valve 152, second one-way check valve 153, first control valve 154, first cooling water circulation loop 155, first nitrogen input pipeline 156, first nitrogen output pipeline 157, first precision pump 158, first circulating water storage tank 160;

[0028] Second input pipeline 200, oxidant buffer tank 210, second precision automatic weighing scale 220, second microfilter 230, second automatic mass flowmeter 240, second bypass pipeline 251, third one-way check valve 252, fourth one-way check valve 253, second control valve 254, second cooling water circulation loop 255, second nitrogen input pipeline 256, second nitrogen output pipeline 257, second precision pump 258, second circulating water storage tank 260;

[0029] a third input pipeline 300, a dimethyl sulfide buffer tank 310, a third precision automatic weighing scale 320, a third microfilter 330, a third automatic mass flowmeter 340, a third bypass pipeline 351, a fifth one-way check valve 352, a sixth one-way check valve 353, a third control valve 354, a third cooling water circulation loop 355, a third nitrogen input pipeline 356, a third nitrogen output pipeline 357, a third precision pump 358, and a third circulating water storage tank 360;

[0030] DMSO reaction system 400. DETAILED DESCRIPTION

[0031] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0032] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0033] In the description of this application, if there is a description of first or second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0034] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0035] Dimethyl sulfoxide (DMSO) is a sulfur-containing organic compound that is a colorless, transparent liquid at room temperature. It has the characteristics of high polarity, high hygroscopicity, flammability, and a high-boiling-point aprotic nature. DMSO is soluble in water, ethanol, solvents, ether, and chloroform. It is a highly polar, inert solvent and is widely used as a solvent and reaction reagent. Furthermore, DMSO has a highly selective extraction ability and can be used as an extraction solvent for the separation of alkanes and aromatic hydrocarbons. In addition, DMSO can also be used as a capacitor dielectric, antifreeze, brake fluid, and rare metal extractant.

[0036] In related technologies, dimethyl sulfide is produced by oxidizing dimethyl sulfide with an oxidant. This process does not use a catalyst. The oxidant and dimethyl sulfide are mixed, reacted in a six-stage tubular reactor, and the temperature of each stage is strictly controlled to ultimately produce dimethyl sulfoxide. However, this method suffers from low dimethyl sulfide conversion rates and low oxidant utilization rates. There is an excess of oxidant, which can easily lead to further oxidation of dimethyl sulfone to dimethyl sulfone. Furthermore, the amounts of oxidant and dimethyl sulfide cannot be precisely controlled, leading to excessive use of oxidant or dimethyl sulfide, which can lead to material waste and increase the production cost of dimethyl sulfoxide. Furthermore, this method does not meet the policy requirement that hazardous processes must be fully continuous and automated.

[0037] In order to solve the above problems, the present application proposes a continuous automated precision feeding system for preparing dimethyl sulfoxide. The embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0038] Reference Figure 1The present application provides a continuous automated precision feeding system for preparing dimethyl sulfoxide, comprising: a first input pipeline 100, a solvent buffer tank 110, a first precision automatic weighing scale 120, a first precision pump 158, a first microfilter 130, a first automatic mass flowmeter 140, a first bypass pipeline 151, a first one-way check valve 152, a second one-way check valve 153, a second input pipeline 200, an oxidant buffer tank 210, a second precision automatic weighing scale 220, a second precision pump 258, a second microfilter 230, a second automatic mass flowmeter 2 ... The second bypass line 251, the third one-way check valve 252, the fourth one-way check valve 253, the third input pipeline 300, the dimethyl sulfide buffer tank 310, the third precision automatic weighing scale 320, the third precision pump 358, the third microfilter 330, the third automatic mass flow meter 340, the third bypass line 351, the fifth one-way check valve 352, the sixth one-way check valve 353, the DMSO reaction system 400 and the DCS control system; the first precision automatic weighing scale 120 is arranged at the bottom of the solvent buffer tank 110, and the input end of the solvent buffer tank 110 is connected to the first input pipeline. The output end of the solvent buffer tank 110 is connected to the output end of the first precision pump 158, the output end of the first precision pump 158 is connected to the input end of the first microfilter 130, the output end of the first microfilter 130 is connected to the DMSO reaction system 400, the first automatic mass flow meter 140 is communicated with the output end of the first microfilter 130, and the first automatic mass flow meter 140 is arranged between the first microfilter 130 and the DMSO reaction system 400, the first input pipeline 100 is used to transport the solvent to the solvent buffer tank 110, the first A one-way check valve 152 and a second one-way check valve 153 are both provided on the first bypass line 151. One end of the first bypass line 151 is connected to the second output end of the solvent buffer tank 110, and the other end of the first bypass line 151 is connected to the pipeline between the first automatic mass flow meter 140 and the DMSO reaction system 400. The first one-way check valve 152 is used to control the fluid in the first bypass line 151 to flow toward the DMSO reaction system 400, and the second one-way check valve 153 is used to control the fluid in the first bypass line 151 to flow toward the solvent buffer tank 110.The second precision automatic weighing scale 220 is provided at the bottom of the oxidant buffer tank 210, the input end of the oxidant buffer tank 210 is connected to the output end of the second input pipeline 200, the first output end of the oxidant buffer tank 210 is connected to the input end of the second precision pump 258, the output end of the second precision pump 258 is connected to the input end of the second microfilter 230, the output end of the second microfilter 230 is connected to the DMSO reaction system 400, the second automatic mass flow meter 240 is connected to the output end of the second microfilter 230, and the second automatic mass flow meter 240 is provided between the second microfilter 230 and the DMSO reaction system 400, the second input pipeline 200 is used to transport the oxidant to the oxidant buffer tank 210, and the third one-way The check valve 252 and the fourth one-way check valve 253 are both provided on the second bypass line 251. One end of the second bypass line 251 is connected to the second output end of the oxidant buffer tank 210, and the other end of the second bypass line 251 is connected to the pipeline between the second automatic mass flowmeter 240 and the DMSO reaction system 400. The third one-way check valve 252 is used to control the fluid in the second bypass line 251 to flow in the direction of the DMSO reaction system 400, and the fourth one-way check valve 253 is used to control the fluid in the second bypass line 251 to flow in the direction of the oxidant buffer tank 210. The third precise automatic weighing scale 320 is provided at the bottom of the dimethyl sulfide buffer tank 310, and the input end of the dimethyl sulfide buffer tank 310 is connected to the third input pipeline 3 00, the first output end of the dimethyl sulfide buffer tank 310 is connected to the input end of the third precision pump 358, the output end of the second precision pump 358 is connected to the input end of the third microfilter 330, the output end of the third microfilter 330 is connected to the DMSO reaction system 400, the third automatic mass flow meter 340 is in communication with the output end of the third microfilter 330, and the third automatic mass flow meter 340 is disposed between the third microfilter 330 and the DMSO reaction system 400, the third input pipeline 300 is used to transport dimethyl sulfide to the dimethyl sulfide buffer tank 310, the fifth one-way check valve 352 and the sixth one-way check valve 353 are both disposed on the third bypass pipeline 351, and one end of the third bypass pipeline 351 is connected to the output end of the third microfilter 330. The third bypass line 351 is connected to the second output end of the dimethyl sulfide buffer tank 310. The other end of the third bypass line 351 is connected to the pipeline between the third automatic mass flowmeter 340 and the DMSO reaction system 400. A fifth one-way check valve 352 is used to control the flow of fluid in the third bypass line 351 toward the DMSO reaction system 400. A sixth one-way check valve 353 is used to control the flow of fluid in the third bypass line 351 toward the dimethyl sulfide buffer tank 310. The DCS control system is respectively connected to the first precision automatic weighing scale 120, the first automatic mass flowmeter 140, the second precision automatic weighing scale 220, the second automatic mass flowmeter 240, the third precision automatic weighing scale 320, and the third automatic mass flowmeter 340.

[0039] In some embodiments, impurity discharge pipes are respectively provided at the bottoms of the first microfilter, the second microfilter, and the third microfilter.

[0040] It should be noted that dimethyl sulfide and an oxidant react in DMSO reaction system 400 to produce dimethyl sulfoxide, and a solvent is added to DMSO reaction system 400 to ensure more complete contact between dimethyl sulfide and the oxidant, accelerate the reaction rate between dimethyl sulfide and the oxidant, improve the conversion rate of dimethyl sulfide and the effective utilization rate of the oxidant, and the solvent can be recycled after use to avoid resource waste. DMSO is the abbreviation of dimethyl sulfoxide.

[0041] In some embodiments, the solvent can be one of water, methanol, ethanol, n-propanol, isopropanol, tert-butanol, isobutanol, acetone, butanone, or acetonitrile, and the oxidant can be one of nitrogen dioxide, nitric acid, hydrogen peroxide, or nitrogen dioxide, which is not limited in the embodiments of the present application.

[0042] It should be noted that in the DCS control system, Distributed Control System is abbreviated as DCS, Distributed, so the Chinese meaning of DCS control system is "distributed control system".

[0043] It should be noted that the first precision pump, the second precision pump and the third precision pump can be one of a precision constant flow pump, a plunger pump, a metering pump, or a horizontal flow pump, and this embodiment of the present application does not limit this; the specific specifications of the first precision pump correspond to the flow rate of the solvent, the specific specifications of the second precision pump correspond to the flow rate of the oxidant, and the specific specifications of the third precision pump correspond to the flow rate of dimethyl sulfide.

[0044] It should be noted that the first one-way check valve 152 is used to control the fluid in the first bypass line 151 to flow in the direction of the DMSO reaction system 400, and the second one-way check valve 153 is used to control the fluid in the first bypass line 151 to flow in the direction of the solvent buffer tank 110. By setting the first bypass line 151, the first one-way check valve 152 and the second one-way check valve 153, the DCS control system controls the opening of the second bypass line 151 when the fluid mass detected by the first automatic mass flow meter 140 and delivered from the first microfilter 130 exceeds the preset solvent real-time flow range value. The one-way check valve 153 allows part of the fluid transported from the first microfilter 130 to the DMSO reaction system 400 to be transported from the first bypass line 151 to the solvent buffer tank 110, thereby reducing the real-time solvent amount transported into the DMSO reaction system 400; when the fluid mass is lower than the preset solvent real-time flow range value, the DCS control system controls the opening of the first one-way check valve 152, so that the solvent in the solvent buffer tank 110 can also be transported to the DMSO reaction system 400 through the second bypass line 251, thereby increasing the real-time solvent amount transported into the DMSO reaction system 400. By setting a second bypass line 251, a third one-way check valve 252 and a fourth one-way check valve 253, the mass of the fluid delivered from the second microfilter 230 detected by the second automatic mass flow meter 240, when the fluid mass exceeds the preset oxidant real-time flow range value, the DCS control system controls the opening of the fourth one-way check valve 253, so that the portion of the fluid delivered from the second microfilter 230 to the DMSO reaction system 400 is delivered from the second bypass line 251 to the oxidant buffer tank 210, thereby reducing the real-time oxidant amount delivered to the DMSO reaction system 400; when the fluid mass is lower than the preset oxidant real-time flow range value, the DCS control system controls the opening of the third one-way check valve 252, so that the oxidant in the oxidant buffer tank 210 can still be delivered to the DMSO reaction system 400 through the second bypass line 251, thereby increasing the real-time oxidant amount delivered to the DMSO reaction system 400.By setting the third bypass line 351, the fifth one-way check valve 352 and the sixth one-way check valve 353, the DCS control system controls the opening of the sixth one-way check valve 353 to detect the mass of the fluid delivered from the third microfilter 330 detected by the third automatic mass flow meter 340. When the fluid mass exceeds the preset real-time flow range value of dimethyl sulfide, the DCS control system controls the opening of the sixth one-way check valve 353 so that part of the fluid delivered from the third microfilter 330 to the DMSO reaction system 400 is delivered from the third bypass line 351 to the dimethyl sulfide buffer tank 310, thereby reducing the real-time amount of dimethyl sulfide delivered to the DMSO reaction system 400; when the fluid mass is lower than the preset real-time flow range value of dimethyl sulfide, the DCS control system controls the opening of the fifth one-way check valve 352 to allow the dimethyl sulfide in the dimethyl sulfide buffer tank 310 to be delivered to the DMSO reaction system 400 through the second bypass line 251, thereby increasing the real-time amount of dimethyl sulfide delivered to the DMSO reaction system 400.

[0045] It should be noted that the DCS control system is respectively connected to the first precision automatic weighing scale 120, the first automatic mass flowmeter 140, the second precision automatic weighing scale 220, the second automatic mass flowmeter 240, the third precision automatic weighing scale 320 and the third automatic mass flowmeter 340; the first precision automatic weighing scale 120 is used to perform real-time difference detection on the weight difference of the solvent in the solvent buffer tank 110 to generate a first weight difference detection signal, and send the first weight difference detection signal to the DCS control system; the second precision automatic weighing scale 220 is used to perform real-time difference detection on the weight difference of the oxidant in the oxidant buffer tank 210 to generate a second weight difference detection signal, and send the second weight difference detection signal to the DCS control system; the third precision automatic weighing scale 320 is used to perform real-time difference detection on the weight difference of dimethyl sulfide in the dimethyl sulfide buffer tank 310 to generate a third weight difference detection signal, and send the third weight difference detection signal to the DCS control system.

[0046] It should be noted that the solvent buffer tank 110, the oxidant buffer tank 210 and the dimethyl sulfide buffer tank 310 are respectively provided with a pressure detector and a temperature detector, and the DCS control system is connected to each pressure detector and temperature detector. The pressure detector is used to detect the current pressure values ​​of the corresponding solvent buffer tank 110, the oxidant buffer tank 210 and the dimethyl sulfide buffer tank 310 in real time, and the current pressure value in the buffer tank is transmitted to the DCS control system, and the current pressure value in the buffer tank is displayed in real time on the DCS panel to observe whether the pressure in the buffer tank is too high to prevent safety problems; the temperature detector is used to detect the current temperature value of the corresponding solvent buffer tank 110, the oxidant buffer tank 210 and the dimethyl sulfide buffer tank 310 in real time, and the current temperature value of the buffer tank is transmitted to the DCS control system, and the current temperature value in the buffer tank is displayed in real time on the DCS panel to observe the current temperature value in the buffer tank.

[0047] In the present application, the solvent is delivered to the DMSO reaction system 400 through the first input pipeline 100, the solvent buffer tank 110 and the first microfilter 130. The first input pipeline 100 is used to deliver the solvent to the solvent buffer tank 110. The solvent buffer tank 110 is used to temporarily store the solvent delivered from the first input pipeline 100. The first precision automatic weighing scale 120 is used to detect the weight difference of the solvent in the solvent buffer tank 110 in real time and generate a first weight difference detection signal, and send the first weight difference detection signal to the DCS control system. The first microfilter 130 The first automatic mass flow meter 140 is used to filter impurities from the solvent delivered from the solvent buffer tank 110; the first automatic mass flow meter 140 is used to detect the quality of the solvent fluid delivered from the first microfilter 130 in real time and generate a first quality detection signal, and send the first quality detection signal to the DCS control system. The DCS control system is used to compare the first weight difference detection signal with the value corresponding to the first quality detection signal, so that an interlocked calibration function is formed between the first precision automatic weighing scale 120 and the first automatic mass flow meter 140, further improving the accuracy of solvent quality detection; The oxidant is delivered to the DMSO reaction system 400 through the second input pipeline 200, the oxidant buffer tank 210 and the second microfilter 230. The second input pipeline 200 is used to deliver the oxidant to the oxidant buffer tank. The oxidant buffer tank is used to temporarily store the oxidant delivered from the second input pipeline 200. The second precise automatic weighing scale 220 is used to detect the weight difference of the oxidant in the oxidant buffer tank 210 in real time and generate a second weight difference detection signal, and send the second weight difference detection signal to the DCS control system. The second microfilter 230 is used to detect the weight difference of the oxidant in the oxidant buffer tank 210 in real time and generate a second weight difference detection signal, and send the second weight difference detection signal to the DCS control system. The oxidant delivered from the oxidant buffer tank 210 is subjected to impurity filtering. The second automatic mass flowmeter 240 is used to detect the mass of the oxidant fluid delivered from the second microfilter 230 in real time and generate a second mass detection signal. The second mass detection signal is sent to the DCS control system. The DCS control system is used to compare the second weight difference detection signal with the value corresponding to the second mass detection signal, so that an interlocked calibration function is formed between the second precision automatic weighing scale 220 and the second automatic mass flowmeter 240, further improving the accuracy of the oxidant quality detection.Dimethyl sulfide is transported to the DMSO reaction system 400 through the third input pipeline 300, the dimethyl sulfide buffer tank 310 and the third microfilter 330. The third input pipeline 300 is used to transport dimethyl sulfide to the dimethyl sulfide buffer tank 310. The dimethyl sulfide buffer tank 310 is used to temporarily store the dimethyl sulfide transported from the third input pipeline 300. The third precise automatic weighing scale 320 is used to detect the weight difference of the dimethyl sulfide in the dimethyl sulfide buffer tank 310 in real time and generate a third weight difference detection signal, and send the third weight difference detection signal to the DCS control system. The third microfilter 330 is used to filter impurities from the dimethyl sulfide delivered from the dimethyl sulfide buffer tank 310; the third automatic mass flowmeter 340 is used to monitor the mass of the dimethyl sulfide fluid delivered from the third microfilter 330 in real time and generate a third mass detection signal. This third mass detection signal is then sent to the DCS control system, which compares the third weight difference detection signal with the value corresponding to the third mass detection signal. This creates an interlocked calibration function between the third precision automatic weighing scale 320 and the third automatic mass flowmeter 340, further improving the accuracy of dimethyl sulfide quality detection. This configuration improves the conversion rate of dimethyl sulfide and the effective utilization rate of the oxidant, while also enabling continuous automated dosing of DMSO and reducing safety hazards and labor costs.

[0048] It is understandable that the solvent buffer tank 110 , the oxidant buffer tank 210 and the dimethyl sulfide buffer tank 310 are all provided with liquid level automatic detection instruments, and the DCS control system is connected to each liquid level automatic detection instrument.

[0049] It should be noted that the DCS control system is connected to each automatic liquid level detection instrument respectively, and the automatic liquid level detection instrument corresponding to the solvent buffer tank 110 is used to monitor the liquid level of the solvent in the solvent buffer tank 110 in real time to generate a first liquid level detection signal and output the first liquid level detection signal to the DCS control system. The DCS control system determines whether the liquid level value in the solvent buffer tank 110 exceeds the first preset liquid level threshold or is lower than the first preset liquid level minimum value based on the first liquid level detection signal. When the liquid level value in the solvent buffer tank 110 is equal to or higher than the first preset liquid level threshold, the DCS control system controls the tank area connected to the input end of the first input pipeline 100 to stop supplying solvent to the solvent buffer tank 110. When the liquid level value in the solvent buffer tank 110 is lower than the first preset liquid level minimum value, the DCS control system controls the tank area connected to the input end of the first input pipeline 100 to supply solvent to the solvent buffer tank 110 to control the solvent liquid level in the solvent buffer tank 110 to be between the first preset liquid level threshold and the first preset liquid level threshold. The automatic liquid level detection instrument corresponding to the oxidant buffer tank 210 is used to monitor the liquid level of the oxidant in the oxidant buffer tank 210 in real time to generate a second liquid level detection signal and output the second liquid level detection signal to the DCS control system. The DCS control system determines whether the liquid level value in the oxidant buffer tank 210 exceeds the second preset liquid level threshold or is lower than the second preset liquid level minimum value according to the second liquid level detection signal. When the liquid level value in the oxidant buffer tank 210 is equal to or higher than the second preset liquid level threshold, the DCS control system controls the tank area connected to the input end of the second input pipeline 200 to stop supplying oxidant to the oxidant buffer tank 210. When the liquid level value in the oxidant buffer tank 210 is lower than the second preset liquid level minimum value, the DCS control system controls the tank area connected to the input end of the second input pipeline 200 to supply oxidant to the oxidant buffer tank 210, so as to control the oxidant liquid level in the oxidant buffer tank 210 to be between the second preset liquid level threshold and the second preset liquid level minimum value.The automatic liquid level detection instrument corresponding to the dimethyl sulfide buffer tank 310 is used to monitor the liquid level of dimethyl sulfide in the dimethyl sulfide buffer tank 310 in real time to generate a second liquid level detection signal and output the second liquid level detection signal to the DCS control system. The DCS control system determines whether the liquid level in the dimethyl sulfide buffer tank 310 exceeds a second preset liquid level threshold or is below a second preset liquid level minimum value based on the second liquid level detection signal. If the liquid level in the dimethyl sulfide buffer tank 310 is equal to or above the second preset liquid level threshold, the DCS control system controls the tank farm connected to the input end of the second input pipeline 200 to stop supplying dimethyl sulfide to the dimethyl sulfide buffer tank 310. If the liquid level in the dimethyl sulfide buffer tank 310 is below the second preset liquid level minimum value, the DCS control system controls the tank farm connected to the input end of the second input pipeline 200 to supply dimethyl sulfide to the dimethyl sulfide buffer tank 310 to control the dimethyl sulfide liquid level in the dimethyl sulfide buffer tank 310 to be between the second preset liquid level threshold and the second preset liquid level minimum value.

[0050] Reference Figure 1 It can be understood that the continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a first cooling water circulation loop 155 and a first circulating water storage tank 160. The first circulating water storage tank 160 is arranged on the first cooling water circulation loop 155. One end of the first cooling water circulation loop 155 is connected to the solvent buffer tank 110 through the circulating water input port in the solvent buffer tank 110, and the other end of the first cooling water circulation loop 155 is connected to the solvent buffer tank 110 through the circulating water output port in the solvent buffer tank 110.

[0051] It should be noted that by setting up the first cooling water circulation loop 155 and the first circulating water storage tank 160, the cold circulating water is exchanged with the material in the solvent buffer tank 110 that needs to be cooled through a heat transfer medium, and is recycled to prevent the temperature of the material in the solvent buffer tank 110 from being too high and decomposing it.

[0052] Reference Figure 1 It can be understood that the continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a second cooling water circulation loop 255 and a second circulating water storage tank 260. The second circulating water storage tank 260 is arranged on the second cooling water circulation loop 255. One end of the second cooling water circulation loop 255 is connected to the oxidant buffer tank 210 through the circulating water input port in the oxidant buffer tank 210, and the other end of the second cooling water circulation loop 255 is connected to the oxidant buffer tank 210 through the circulating water output port in the oxidant buffer tank 210.

[0053] It should be noted that by setting up a second cooling water circulation loop 255 and a second circulating water storage tank 260, the cold circulating water is exchanged with the material in the oxidant buffer tank 210 that needs to be cooled through a heat transfer medium, and is recycled to prevent the temperature of the material in the oxidant buffer tank 210 from being too high and decomposing it.

[0054] Reference Figure 1 It can be understood that the continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a third cooling water circulation loop 355 and a third circulating water storage tank 360. The third circulating water storage tank 360 is arranged on the third cooling water circulation loop 355. One end of the third cooling water circulation loop 355 is connected to the dimethyl sulfide buffer tank 310 through the circulating water input port in the dimethyl sulfide buffer tank 310, and the other end of the third cooling water circulation loop 355 is connected to the dimethyl sulfide buffer tank 310 through the circulating water output port in the dimethyl sulfide buffer tank 310.

[0055] It should be noted that by setting up the third cooling water circulation loop 355 and the third circulating water storage tank 360, the cold circulating water is exchanged with the material in the dimethyl sulfide buffer tank 310 that needs to be cooled through a heat transfer medium, and is recycled to prevent the temperature of the material in the dimethyl sulfide buffer tank 310 from being too high and decomposing it.

[0056] Reference Figure 1 It can be understood that the continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a solvent delivery pipeline and a first control valve 154. The input end of the solvent delivery pipeline is connected to the first output end of the solvent buffer tank 110, and the output end of the solvent delivery pipeline is connected to the DMSO reaction system 400. The first microfilter 130 and the first automatic mass flowmeter 140 are both provided on the solvent delivery pipeline and communicate with the solvent delivery pipeline. The first control valve 154 is provided on the solvent delivery pipeline, and the first control valve 154 is provided between the output end of the first bypass line 151 and the DMSO reaction system 400. The first control valve 154 is connected to the DCS control system.

[0057] It should be noted that the DCS control system controls whether to supply the solvent to the DMSO reaction system 400 through the first control valve 154 .

[0058] Reference Figure 1It can be understood that the continuous automated precision feeding system for preparing dimethyl sulfoxide also includes an oxidant delivery pipeline and a second control valve 254. The input end of the oxidant delivery pipeline is connected to the first output end of the oxidant buffer tank 210, and the output end of the oxidant delivery pipeline is connected to the DMSO reaction system 400. The second microfilter 230 and the second automatic mass flowmeter 240 are both provided on the oxidant delivery pipeline and communicate with the oxidant delivery pipeline. The second control valve 254 is provided on the oxidant delivery pipeline, and the second control valve 254 is provided between the output end of the second bypass line 251 and the DMSO reaction system 400. The second control valve 254 is connected to the DCS control system.

[0059] It should be noted that the DCS control system controls whether to deliver the oxidant to the DMSO reaction system 400 through the second control valve 254 .

[0060] Reference Figure 1 It can be understood that the continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a dimethyl sulfide delivery pipeline and a third control valve 354. The input end of the dimethyl sulfide delivery pipeline is connected to the first output end of the dimethyl sulfide buffer tank 310, and the output end of the dimethyl sulfide delivery pipeline is connected to the DMSO reaction system 400. The third microfilter 330 and the third automatic mass flowmeter 340 are both provided on the dimethyl sulfide delivery pipeline and connected to the dimethyl sulfide delivery pipeline. The third control valve 354 is provided on the dimethyl sulfide delivery pipeline, and the third control valve 354 is provided between the output end of the third bypass line 351 and the DMSO reaction system 400. The third control valve 354 is connected to the DCS control system.

[0061] It should be noted that the DCS control system controls whether to deliver dimethyl sulfide to the DMSO reaction system 400 through the third control valve 354 .

[0062] Reference Figure 1 It can be understood that the continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a first nitrogen input pipeline 156 and a first nitrogen output pipeline 157. The output end of the first nitrogen input pipeline 156 is connected to the solvent buffer tank 110 through the nitrogen input port on the solvent buffer tank 110, and the solvent buffer tank 110 is connected to the first nitrogen output pipeline 157 through the nitrogen output port on the solvent buffer tank 110.

[0063] It should be noted that by setting up the first nitrogen input pipeline 156, nitrogen from an external nitrogen storage tank is introduced into the solvent buffer tank 110 to isolate oxygen and achieve nitrogen sealing protection to prevent the solvent in the solvent buffer tank 110 from being oxidized and denatured.

[0064] Reference Figure 1It can be understood that the continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a second nitrogen input pipeline 256 and a second nitrogen output pipeline 257. The output end of the second nitrogen input pipeline 256 is connected to the oxidant buffer tank 210 through the nitrogen input port on the oxidant buffer tank 210, and the oxidant buffer tank 210 is connected to the second nitrogen output pipeline 257 through the nitrogen output port on the oxidant buffer tank 210.

[0065] It should be noted that by setting up a second nitrogen input pipeline 256, nitrogen from an external nitrogen storage tank is introduced into the oxidant buffer tank 210 to isolate oxygen, achieve nitrogen sealing protection, and prevent the oxidant in the oxidant buffer tank 210 from being oxidized and denatured.

[0066] Reference Figure 1 It can be understood that the continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a third nitrogen input pipeline 356 and a third nitrogen output pipeline 357. The output end of the third nitrogen input pipeline 356 is connected to the dimethyl sulfide buffer tank 310 through the nitrogen input port on the dimethyl sulfide buffer tank 310, and the dimethyl sulfide buffer tank 310 is connected to the third nitrogen output pipeline 357 through the nitrogen output port on the dimethyl sulfide buffer tank 310.

[0067] It should be noted that by setting up a third nitrogen input pipeline 356, nitrogen from an external nitrogen storage tank is introduced into the dimethyl sulfide buffer tank 310 to isolate oxygen, achieve nitrogen sealing protection, and prevent the dimethyl sulfide in the dimethyl sulfide buffer tank 310 from being oxidized and denatured.

[0068] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0069] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

[0070] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A continuous automated precision feeding system for preparing dimethyl sulfoxide, characterized in that: include: a first input pipeline, a solvent buffer tank, a first precision automatic weighing scale, a first precision pump, a first microfilter, a first automatic mass flowmeter, a first bypass pipeline, a first one-way check valve, a second one-way check valve, a second input pipeline, an oxidant buffer tank, a second precision automatic weighing scale, a second precision pump, a second microfilter, a second automatic mass flowmeter, a second bypass pipeline, a third one-way check valve, a fourth one-way check valve, a third input pipeline, a dimethyl sulfide buffer tank, a third precision automatic weighing scale, a third precision pump, a third microfilter, a third automatic mass flowmeter, a third bypass pipeline, a fifth one-way check valve, a sixth one-way check valve, a DMSO reaction system, and a DCS control system; The first precision automatic weighing scale is arranged at the bottom of the solvent buffer tank, the input end of the solvent buffer tank is connected to the output end of the first input pipeline, the first output end of the solvent buffer tank is connected to the input end of the first precision pump, the output end of the first precision pump is connected to the input end of the first microfilter, the output end of the first microfilter is connected to the DMSO reaction system, the first automatic mass flowmeter is communicated with the output end of the first microfilter, and the first automatic mass flowmeter is arranged between the first microfilter and the DMSO reaction system, the first input pipeline is used to transport the solvent to the solvent buffer tank, the first one-way check valve and the second one-way check valve are both arranged on the first bypass pipeline, one end of the first bypass pipeline is connected to the second output end of the solvent buffer tank, and the other end of the first bypass pipeline is connected to the pipeline between the first automatic mass flowmeter and the DMSO reaction system, the first one-way check valve is used to control the fluid in the first bypass pipeline to flow along the direction of the DMSO reaction system, and the second one-way check valve is used to control the fluid in the first bypass pipeline to flow along the direction of the solvent buffer tank; The second precision automatic weighing scale is arranged at the bottom of the oxidant buffer tank, the input end of the oxidant buffer tank is connected to the output end of the second input pipeline, the first output end of the oxidant buffer tank is connected to the input end of the second precision pump, the output end of the second precision pump is connected to the input end of the second microfilter, the output end of the second microfilter is connected to the DMSO reaction system, the second automatic mass flowmeter is communicated with the output end of the second microfilter, and the second automatic mass flowmeter is arranged between the second microfilter and the DMSO reaction system, the second input pipeline is used to transport the oxidant to the oxidant buffer tank, the third one-way check valve and the fourth one-way check valve are both arranged on the second bypass line, one end of the second bypass line is connected to the second output end of the oxidant buffer tank, and the other end of the second bypass line is connected to the pipeline between the second automatic mass flowmeter and the DMSO reaction system, the third one-way check valve is used to control the fluid in the second bypass line to flow in the direction of the DMSO reaction system, and the fourth one-way check valve is used to control the fluid in the second bypass line to flow in the direction of the oxidant buffer tank; The third precise automatic weighing scale is arranged at the bottom of the dimethyl sulfide buffer tank, the input end of the dimethyl sulfide buffer tank is connected to the output end of the third input pipeline, the first output end of the dimethyl sulfide buffer tank is connected to the input end of the third precise pump, the output end of the third precise pump is connected to the input end of the third microfilter, the output end of the third microfilter is connected to the DMSO reaction system, the third automatic mass flow meter is connected to the output end of the third microfilter, and the third automatic mass flow meter is arranged between the third microfilter and the DMSO reaction system, the third automatic mass flow meter is connected to the output end of the third microfilter, and the third automatic mass flow meter is connected to the output end of the third microfilter. Three input pipelines are used to transport dimethyl sulfide to the dimethyl sulfide buffer tank, the fifth one-way check valve and the sixth one-way check valve are both provided on the third bypass pipeline, one end of the third bypass pipeline is connected to the second output end of the dimethyl sulfide buffer tank, and the other end of the third bypass pipeline is connected to the pipeline between the third automatic mass flowmeter and the DMSO reaction system, the fifth one-way check valve is used to control the fluid in the second bypass pipeline to flow in the direction of the DMSO reaction system, and the sixth one-way check valve is used to control the fluid in the second bypass pipeline to flow in the direction of the oxidant buffer tank; The DCS control system is respectively connected to the first precision automatic weighing scale, the first automatic mass flowmeter, the first precision pump, the first one-way check valve, the second one-way check valve, the second precision automatic weighing scale, the second automatic mass flowmeter, the first precision pump, the first one-way check valve, the second one-way check valve, the third precision automatic weighing scale, the third automatic mass flowmeter, the first precision pump, the first one-way check valve, and the second one-way check valve.

2. The continuous automated precise feeding system for preparing dimethyl sulfoxide according to claim 1, characterized in that: The solvent buffer tank, the oxidant buffer tank and the dimethyl sulfide buffer tank are all provided with automatic liquid level detection instruments, and the DCS control system is connected to each of the automatic liquid level detection instruments.

3. The continuous automated precise feeding system for preparing dimethyl sulfoxide according to claim 1, characterized in that: The continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a first cooling water circulation loop and a first circulating water storage tank. The first circulating water storage tank is arranged on the first cooling water circulation loop. One end of the first cooling water circulation loop is connected to the solvent buffer tank through the circulating water input port in the solvent buffer tank, and the other end of the first cooling water circulation loop is connected to the solvent buffer tank through the circulating water output port in the solvent buffer tank.

4. The continuous automated precise feeding system for preparing dimethyl sulfoxide according to claim 1, characterized in that: The continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a second cooling water circulation loop and a second circulating water storage tank. The second circulating water storage tank is arranged on the second cooling water circulation loop. One end of the second cooling water circulation loop is connected to the oxidant buffer tank through the circulating water input port in the oxidant buffer tank, and the other end of the second cooling water circulation loop is connected to the oxidant buffer tank through the circulating water output port in the oxidant buffer tank.

5. The continuous automated precise feeding system for preparing dimethyl sulfoxide according to claim 1, characterized in that: The continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a third cooling water circulation loop and a third circulating water storage tank. The third circulating water storage tank is arranged on the third cooling water circulation loop. One end of the third cooling water circulation loop is connected to the dimethyl sulfide buffer tank through the circulating water inlet in the dimethyl sulfide buffer tank, and the other end of the third cooling water circulation loop is connected to the dimethyl sulfide buffer tank through the circulating water outlet in the dimethyl sulfide buffer tank.

6. The continuous automated precise feeding system for preparing dimethyl sulfoxide according to claim 1, characterized in that: The continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a solvent delivery pipeline and a first control valve, the input end of the solvent delivery pipeline is connected to the first output end of the solvent buffer tank, the output end of the solvent delivery pipeline is connected to the DMSO reaction system, the first microfilter and the first automatic mass flowmeter are both arranged on the solvent delivery pipeline and connected to the solvent delivery pipeline, the first control valve is arranged on the solvent delivery pipeline, and the first control valve is arranged between the output end of the first bypass line and the DMSO reaction system, and the first control valve is connected to the DCS control system.

7. The continuous automated precise feeding system for preparing dimethyl sulfoxide according to claim 1, characterized in that: The continuous automated precision feeding system for preparing dimethyl sulfoxide also includes an oxidant delivery pipeline and a second control valve, the input end of the oxidant delivery pipeline is connected to the first output end of the oxidant buffer tank, the output end of the oxidant delivery pipeline is connected to the DMSO reaction system, the second microfilter and the second automatic mass flowmeter are both arranged on the oxidant delivery pipeline and connected to the oxidant delivery pipeline, the second control valve is arranged on the oxidant delivery pipeline, and the second control valve is arranged between the output end of the second bypass line and the DMSO reaction system, and the second control valve is connected to the DCS control system.

8. The continuous automated precise feeding system for preparing dimethyl sulfoxide according to claim 1, characterized in that: The continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a dimethyl sulfide delivery pipeline and a third control valve. The input end of the dimethyl sulfide delivery pipeline is connected to the first output end of the dimethyl sulfide buffer tank, and the output end of the dimethyl sulfide delivery pipeline is connected to the DMSO reaction system. The third microfilter and the third automatic mass flowmeter are both arranged on the dimethyl sulfide delivery pipeline and connected to the dimethyl sulfide delivery pipeline. The third control valve is arranged on the dimethyl sulfide delivery pipeline, and the third control valve is arranged between the output end of the third bypass line and the DMSO reaction system. The third control valve is connected to the DCS control system.

9. The continuous automated precise feeding system for preparing dimethyl sulfoxide according to claim 1, characterized in that: The continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a first nitrogen input pipeline and a first nitrogen output pipeline. The output end of the first nitrogen input pipeline is connected to the solvent buffer tank through the nitrogen input port on the solvent buffer tank, and the solvent buffer tank is connected to the first nitrogen output pipeline through the nitrogen output port on the solvent buffer tank.

10. The continuous automated precise feeding system for preparing dimethyl sulfoxide according to claim 1, characterized in that: The continuous automated precision feeding system for preparing dimethyl sulfoxide also includes a second nitrogen input pipeline and a second nitrogen output pipeline. The output end of the second nitrogen input pipeline is connected to the oxidant buffer tank through the nitrogen input port on the oxidant buffer tank, and the oxidant buffer tank is connected to the second nitrogen output pipeline through the nitrogen output port on the oxidant buffer tank.

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