Solvent residue removal device capable of realizing automatic closed-loop control

Abstract

The utility model discloses a solvent residue removal device capable of realizing automatic closed-loop control, which relates to the field of vegetable oil refining and comprises an energy-saving heat exchanger, a raw material preheater, a film evaporator and a solvent recovery component, the solvent recovery assembly is used for recovering a solvent in a material with a solvent, the energy-saving heat exchanger, the raw material preheater and the film evaporator are sequentially connected, a feeding metering pump is installed at the feeding end of the energy-saving heat exchanger, and the discharging side of the film evaporator is connected with an electrochemical sensor storage tank; a finished product material discharge pump is arranged at the discharge end of the electrochemical sensor storage tank; the technical problems that the economic burden of enterprises is increased and unavailable resources are wasted due to solvent residues generated in the production process are effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of vegetable oil refining, specifically to a solvent residual removal device realizing automatic closed loop control. BACKGROUND

[0002] At present, n-hexane is mostly used in the extraction of vegetable oil, acetone is mostly used in the extraction of plant pigment, and ethanol, ethyl acetate or a mixture of two or more of the above solvents is mostly used in the extraction of Chinese herbal medicine. However, due to the limitation of extraction equipment, there is a problem of excessive solvent residue in the extract.

[0003] In the existing plant oil extraction process, the organic solvent and the extraction material are sprayed, permeated, dripped and dried for multiple times, and then washed by new solvent to form mixed oil with a certain concentration. The mixed oil is evaporated by a first long tube evaporator, a second long tube evaporator and a butterfly gas stripping tower under the condition of overall micro negative pressure of the system to obtain crude oil. At this time, the solvent residue in the crude oil is excessive. In the extraction process of pigment and Chinese herbal medicine, the material and the solvent complete the extraction of the mixed solution in the countercurrent extraction tank, and then the product is concentrated by a three-effect evaporator or MVR evaporation technology. However, the product also has the problem of excessive solvent residue.

[0004] However, the solvent residue generated in the production process increases the economic burden of enterprises and wastes non-renewable resources. If the solvent residue cannot be effectively recycled, it will not only cause great harm to the environment, but also harm the health of consumers. In addition, a large amount of solvent residue may cause disasters such as explosion. UTILITY MODEL CONTENT

[0005] In view of the deficiencies of the prior art, the utility model provides a solvent residue removal device realizing automatic closed loop control, which solves the technical problems proposed in the background art.

[0006] To achieve the above purpose, the utility model realizes the following technical scheme: a solvent residue removal device realizing automatic closed loop control, comprising an energy-saving heat exchanger, a raw material preheater, a thin film evaporator and a solvent recovery assembly.

[0007] The solvent recovery assembly is used for recovering the solvent in the material containing solvent, the energy-saving heat exchanger, the raw material preheater and the thin film evaporator are connected in sequence, the energy-saving heat exchanger is provided with a feed metering pump at the feed end, the thin film evaporator is connected with an electrochemical sensor storage tank at the discharge side, and the electrochemical sensor storage tank is provided with a finished material discharge pump at the discharge end.

[0008] The solvent recovery assembly comprises a solvent recovery condenser, the raw material preheater is connected with a heat conducting oil furnace, the heat conducting oil furnace is connected with a heat conducting oil high tank, and the thin film evaporator is connected with the energy-saving heat exchanger and the solvent recovery condenser.

[0009] Preferably, a refrigerator is connected to the solvent recovery condenser, and the refrigerator is connected to the cooling tower.

[0010] Preferably, a vacuum unit is connected to the solvent recovery condenser.

[0011] Preferably, a flow meter is connected to the feed metering pump, and an ACV regulating valve is arranged between the flow meter and the energy-saving heat exchanger.

[0012] Preferably, a sensor is installed on the electrochemical sensor tank, and the feed metering pump, the ACV regulating valve, the electrochemical sensor tank, the heat conducting oil furnace and the refrigerator are electrically connected to a PLC control cabinet.

[0013] Preferably, the cooling tower is connected to a water tank, the water tank is connected to the solvent recovery condenser, and a water pump is arranged between the water tank and the solvent recovery condenser.

[0014] Advantages

[0015] The utility model provides a kind of solvent residual removal device of realizing automatic closed-loop control, with following advantages:

[0016] 1, by being equipped with feed metering pump, can be with solvent material into energy-saving heat exchanger, material is heated after energy-saving heat exchanger enters raw material preheater, by being equipped with heat conducting oil furnace and heat conducting oil high tank, raw material preheater can be heated in advance, by being equipped with feed metering pump, with solvent material can be pumped into heated raw material preheater, by being equipped with raw material preheater, raw material can be preheated, so that raw material absorbs heat, temperature rises, in subsequent process, energy consumption can be reduced, energy utilization is improved, preheated raw material enters into thin film evaporator and is desolventized, and the material after desolventizing flows into electrochemical sensor tank and is stored, by being equipped with material discharge pump, the material after desolventizing can be discharged, when solvent material enters thin film evaporator and is desolventized, material is rapidly evaporated in film state from top to bottom, and a large amount of heat is extracted from the air, which is then heated by the energy-saving heat exchanger to heat the material entering the system, achieving energy recovery. By being equipped with solvent recovery condenser, a large amount of heat is extracted from the air to condense into liquid state, so as to recover the solvent, greatly reducing the economic burden of enterprises, recycling non-renewable resources, and greatly reducing the possibility of explosion and other disasters caused by a large amount of solvent residue.

[0017] 2, by being equipped with sensor, solvent gas content in finished product can be detected, analog signal is transmitted to PLC control cabinet in real time, and the signal is processed to automatically adjust the speed of the feed metering pump and the opening of the ACV regulating valve to realize closed-loop control. At the same time, the signal is transmitted to the heat conducting oil furnace and the refrigerator to adjust the heating and refrigeration power in real time through the material flow, achieving the purpose of energy saving. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the present invention;

[0019] Figure 2 This is a flowchart of the present invention.

[0020] In the diagram: 1. Energy-saving heat exchanger; 2. Raw material preheater; 3. Thin-film evaporator; 4. Electrochemical sensor storage tank; 5. Feed metering pump; 6. Flow meter; 7. Finished product discharge pump; 8. High-level heat transfer oil tank; 9. Heat transfer oil furnace; 10. Solvent recovery condenser; 11. Refrigeration unit; 12. Cooling tower; 13. Vacuum unit; 14. PLC control cabinet; 15. Water tank; 16. Water pump. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Wherein, directional terms such as "upper" and "lower" mentioned herein are used in conjunction with... Figure 1 The orientation is used as a reference.

[0022] Please see Figures 1-2 This utility model provides a technical solution: a solvent residue removal device with automatic closed-loop control, including an energy-saving heat exchanger 1, a raw material preheater 2, a thin-film evaporator 3, and a solvent recovery assembly; the solvent recovery assembly is used to recover the solvent from the soluble material, the energy-saving heat exchanger 1, the raw material preheater 2, and the thin-film evaporator 3 are connected in sequence, the feed metering pump 5 is installed at the feed end of the energy-saving heat exchanger 1, the discharge side of the thin-film evaporator 3 is connected to an electrochemical sensor storage tank 4, and the discharge end of the electrochemical sensor storage tank 4 is equipped with a finished product discharge pump; the solvent recovery assembly includes a solvent recovery condenser 10, the raw material preheater 2 is connected to a thermal oil furnace 9, a thermal oil high-level tank 8 is connected to the thermal oil furnace 9, and the thin-film evaporator 3 is connected to the energy-saving heat exchanger 1 and the solvent recovery condenser 10.

[0023] By installing the feed metering pump 5, the material with solvent can be pumped into the energy-saving heat exchanger 1, and the material is heated in the energy-saving heat exchanger 1 and then enters the raw material preheater 2. By installing the heat conducting oil furnace 9 and the heat conducting oil high tank 8, the raw material preheater 2 can be preheated. By installing the feed metering pump 5, the material with solvent can be pumped into the preheated raw material preheater 2. By installing the raw material preheater 2, the raw material can be preheated, so that the raw material absorbs heat and the temperature rises. In the subsequent process, the energy consumption can be reduced, and the energy utilization rate can be improved. The preheated raw material enters the thin film evaporator 3 for desolventizing, and the desolventized material flows into the electrochemical sensor tank 4 for storage. By installing the material discharge pump, the desolventized material can be discharged. When the material with solvent enters the thin film evaporator 3 for desolventizing, the material rapidly evaporates in a film state from top to bottom, and a large amount of heat is extracted and then enters the energy-saving heat exchanger 1 to heat the material entering the system, achieving the purpose of energy recovery. By installing the solvent recovery condenser 10, a large amount of heat is extracted and then condensed into liquid in the solvent recovery condenser 10, so as to recover the solvent, greatly reducing the economic burden of the enterprise, recycling non-renewable resources, and greatly reducing the possibility of explosion and other disasters caused by a large amount of solvent residue.

[0024] Further, the solvent recovery condenser 10 is connected with a refrigerator 11, and the refrigerator 11 is connected with a cooling tower 12.

[0025] By installing the refrigerator 11 and the cooling tower 12, low-temperature cold water can be provided to the solvent recovery condenser 10.

[0026] Further, the solvent recovery condenser 10 is connected with a vacuum unit 13.

[0027] By connecting the vacuum unit 13, an absolute vacuum pressure working condition can be provided, so as to facilitate the removal of the material solvent residue.

[0028] Further, the feed metering pump 5 is connected with a flow meter 6, and the flow meter 6 is provided with an ACV adjusting valve 7 between the energy-saving heat exchanger 1.

[0029] By connecting the flow meter 6, the flow of the material with solvent entering the energy-saving heat exchanger 1 can be measured. By providing the ACV adjusting valve 7, the flow of the material with solvent can be adjusted.

[0030] Further, the electrochemical sensor tank 4 is provided with a sensor, and the feed metering pump 5, the ACV adjusting valve 7, the electrochemical sensor tank 4, the heat conducting oil furnace 9, and the refrigerator 11 are electrically connected with a PLC control cabinet 14.

[0031] Through the installation of sensors, the solvent gas content in the finished product can be detected, and analog signals are transmitted to the PLC control cabinet 14 in real time, and after processing, the speed of the feed pump and the opening of the ACV regulating valve 7 are automatically adjusted to realize closed-loop automatic control, and the signals are also transmitted to the heat conduction oil furnace 9 and the refrigerator 11 to adjust the heating and refrigeration power through the real-time flow linkage of the material, so that the energy saving purpose is achieved.

[0032] Further, the cooling tower 12 is connected with the water tank 15, the water tank 15 is connected with the solvent recovery condenser 10, and the water pump 16 is arranged between the water tank 15 and the solvent recovery condenser 10.

[0033] Through the setting of the water tank 15, water can be supplied, and through the setting of the water pump 16, the water in the water tank 15 can be pumped out.

[0034] Through the personnel in the art, all electrical components in the case are connected with the power supply through wires, and appropriate controllers should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should be referred to the working principle below to complete the electrical connection in the order of the working sequence of each electrical component. The detailed connection means is a public known technology in the art. The working principle and process are mainly introduced below, and the electrical control is not described.

[0035] The working principle and use process of the utility model: in use, the refrigerator 11 provides low-temperature water, under the action of the vacuum unit 13, the work is carried out under the condition that the absolute vacuum pressure is 10pa, after the device is connected to the pipe position of the outlet of the original production line, the material with solvent is pumped into the flowmeter 6 through the feed metering pump 5, flows into the energy-saving heat exchanger 1, the raw material preheater 2 through the ACV regulating valve 7, and finally reaches the thin film evaporator 3. After desolventizing, the material flows into the electrochemical sensor storage tank 4, and the material is discharged from the system through the material discharge pump. Under the condition of 10pa absolute vacuum, the boiling point of the solvent and other substances is correspondingly reduced. The material first passes through the raw material preheater 2 heated by the heat conduction oil, and then flows into the bottom from the top of the thin film evaporator 3. The material is rapidly evaporated in a film state from top to bottom, a large amount of hot gas passes through the energy-saving heat exchanger 1 to heat the material entering the system, which achieves the purpose of energy recovery. Finally, it reaches the solvent recovery condenser 10 for recovery. The electrochemical sensor storage tank 4 is provided with a sensor for detecting the solvent gas content in the finished product, and analog signals are transmitted to the PLC control cabinet 14 in real time. After processing, the speed of the feed pump and the opening of the ACV regulating valve 7 are automatically adjusted to realize closed-loop automatic control, and the signals are also transmitted to the heat conduction oil furnace 9 and the refrigerator 11 to adjust the heating and refrigeration power through the real-time flow linkage of the material, so that the energy saving purpose is achieved.

[0036] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A solvent residue removal apparatus that implements automatic closed loop control, characterized by, The energy-saving heat exchanger (1), the raw material preheater (2) and the thin film evaporator (3) are sequentially connected, the energy-saving heat exchanger (1) is provided with a feed metering pump (5) at the feed end, the thin film evaporator (3) is connected with an electrochemical sensor storage tank (4) at the discharge side, and the electrochemical sensor storage tank (4) is provided with a finished product material discharge pump (7) at the discharge end. The solvent recovery assembly comprises a solvent recovery condenser (10), the raw material preheater (2) is connected with a heat conducting oil furnace (9), the heat conducting oil furnace (9) is connected with a heat conducting oil high tank (8), and the thin film evaporator (3) is connected with the energy-saving heat exchanger (1) and the solvent recovery condenser (10).

2. The solvent residual removal apparatus of claim 1, wherein The solvent recovery condenser (10) is connected with a refrigerator (11), and the refrigerator (11) is connected with a cooling tower (12).

3. The apparatus for removing residual solvent according to claim 1, wherein The solvent recovery condenser (10) is connected with a vacuum unit (13).

4. The apparatus for removing residual solvent according to claim 1, wherein The feed metering pump (5) is connected with a flow meter (6), and the flow meter (6) is provided with an ACV regulating valve between the energy-saving heat exchanger (1).

5. The solvent residual removal apparatus of claim 4, wherein The electrochemical sensor storage tank (4) is provided with a sensor, and the feed metering pump (5), the ACV regulating valve, the electrochemical sensor storage tank (4), the heat conducting oil furnace and the refrigerator are electrically connected with a PLC control cabinet (14).

6. The solvent residual removal apparatus of claim 2, wherein The cooling tower (12) is connected with a water tank (15), the water tank (15) is connected with the solvent recovery condenser (10), and the water tank (15) and the solvent recovery condenser (10) are provided with a water pump (16).

Images