Vacuum pump system for drying wet materials in drying box

Abstract

The utility model discloses a vacuum pump system for drying wet materials in a drying box, and relates to the technical field of drying of lutein esters. An air inlet of the condenser is communicated with an exhaust port pipeline of the drying box; the vacuum pump system comprises a liquid inlet valve, a roots vacuum pump, a water ring vacuum pump, a branch pipe and a branch pipe valve; an air inlet of the roots vacuum pump is communicated with an exhaust port pipeline of the condenser; an exhaust port of the roots vacuum pump is communicated with an air inlet pipeline of the water ring vacuum pump; and the liquid inlet valve is arranged on a liquid inlet pipe of the roots vacuum pump. According to the vacuum pump system, the system is arranged on the air outlet pipe of the condenser of the drying box, directional flowing of air in the drying box is achieved through the roots vacuum pump or the water ring vacuum pump, the drying efficiency is improved, and rapid condensation, liquefaction and recovery of a solvent are achieved.

Description

Technical Field

[0001] This application relates to the technical field of drying lutein esters, and particularly to a vacuum pump system for drying wet materials in a drying oven. Background Art

[0002] Lutein ester is a kind of carotenoid fatty acid ester, mainly existing in plants such as marigold, corn, and cabbage, and is particularly abundant in marigold. Its main uses include protecting eyesight, preventing eye diseases such as age-related macular degeneration and cataract, and having antioxidant effects. Lutein ester can be naturally hydrolyzed into free lutein in the human body, improving the bioavailability of lutein, and its stability and absorption rate are both superior to lutein. In addition, lutein ester is also used as a food colorant and has good light and heat stability.

[0003] During the production process of lutein ester, the lutein ester obtained by extraction from natural plants is in the form of a slurry, and is made into a powder for sale after drying.

[0004] During the drying process, it is necessary to recover the solvent added during extraction. Currently, the solvent is mainly recovered by liquefying the gas through a condensation system, but the recovery efficiency is low.

[0005] The existing solvent recovery mainly focuses on the devices related to drying after coating the material. For example, the coating drying method and coating drying device disclosed in CN202010892746.3, and the casting machine with an ultrasonic drying device disclosed in CN201220596393.3. The above devices all focus on improving the contact area between the slurry and the hot gas, thereby increasing the evaporation rate of the solvent. However, during the use of this device, there are problems such as slow solvent flow rate and easy damage to the vacuum pump.

[0006] The information disclosed in the background art section is only intended to increase the understanding of the overall background of the present utility model, and should not be regarded as an admission or any form of implication that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0007] This application provides a vacuum pump system for drying wet materials in a drying oven. During the use of this system, it can reduce the frequency of damage and shutdown for maintenance of the roots vacuum pump, and at the same time increase the flow rate of the wet gas during drying of the materials, improving the drying efficiency.

[0008] This application provides a vacuum pump system for drying wet materials in a drying oven. The vacuum pump system is connected to the exhaust port pipeline of the condenser; the intake port of the condenser is connected to the exhaust port pipeline of the drying oven;

[0009] The vacuum pump system includes: a liquid inlet valve, a roots vacuum pump, a water ring vacuum pump, a branch pipe, and a branch pipe valve;

[0010] The intake port of the Roots vacuum pump is connected to the exhaust port pipeline of the condenser; the exhaust port of the Roots vacuum pump is connected to the intake port pipeline of the water ring vacuum pump; the liquid inlet valve is arranged on the liquid inlet pipe of the Roots vacuum pump;

[0011] One end of the branch pipe is connected to the pipeline that is connected to the intake port of the Roots vacuum pump and the exhaust port of the condenser;

[0012] The other end of the branch pipe is connected to the pipeline that is connected to the exhaust port of the Roots vacuum pump and the intake port of the water ring vacuum pump;

[0013] The branch pipe valve is arranged on the branch pipe.

[0014] Preferably, it includes: a flow meter; the flow meter is arranged on the liquid inlet pipe of the Roots vacuum pump.

[0015] Preferably, it includes: a vapor-liquid separator; the vapor-liquid separator is arranged on the liquid inlet pipe of the Roots vacuum pump.

[0016] Preferably, it includes: a heating system; a heat exchanger is arranged inside the drying oven; the heating system includes: an electric heating water tank; the liquid outlet of the electric heating water tank is connected to the liquid inlet of the heat exchanger through a pipeline; the liquid inlet of the electric heating water tank is connected to the liquid outlet of the heat exchanger through a pipeline.

[0017] Preferably, it includes: a hot water pump, a hot water valve; the hot water pump and the hot water valve are arranged at intervals on the pipeline connecting the liquid outlet of the electric heating water tank and the liquid inlet of the heat exchanger.

[0018] Preferably, it includes: a circulating water tank; a circulating interlayer is arranged inside the side wall of the condenser; the water outlet of the circulating interlayer is connected to the water inlet of the circulating water tank through a pipeline; the water inlet of the circulating interlayer is connected to the water outlet of the circulating water tank through a pipeline.

[0019] Preferably, it includes: a circulating pump; the circulating pump is arranged on the pipeline connecting the water inlet of the circulating interlayer and the water outlet of the circulating water tank.

[0020] The beneficial effects that this application can produce include:

[0021] 1) The vacuum pump system for drying wet materials in the drying oven provided by this application. This vacuum pump system realizes the directional flow of gas in the drying oven through the Roots vacuum pump or the water ring vacuum pump by arranging this system on the gas outlet pipe of the condenser in the drying oven, speeds up the drying efficiency, and realizes the rapid condensation and liquefaction recovery of the solvent.

[0022] 2) The vacuum pump system for drying wet materials in the drying oven provided by this application. The fluid flow rate of this system is controlled by the operator manually opening and closing the branch valve to control the fluid entering the Roots vacuum pump, so as to avoid the gas with too high moisture content entering the Roots vacuum pump at the initial stage of drying and causing damage to the pump body, effectively protecting the Roots vacuum pump. At the same time, this device can also reduce the opening times of the Roots pump, thereby reducing the use cost of the vacuum pump system. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of a vacuum pump system for drying wet materials in a drying oven in at least one embodiment provided by the present application;

[0024] Legend Explanation:

[0025] Water tank 11, electric heater 1, hot water pump 2, hot water valve 21, drying oven 3, condenser 4, flowmeter 62, circulating water inlet interface 41, circulating water storage interface 42, circulating water tank 43, circulating pump 44, receiving tank 5, Roots vacuum pump 6, water ring vacuum pump 7, vacuum water tank 51, vapor-liquid separator 54,

[0026] Liquid inlet valve 52, branch valve 61, vacuum valve 71. Detailed Embodiments

[0027] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0029] The technical means not detailed in the present application and not used to solve the technical problems of the present application are set according to the common knowledge in the art, and various common knowledge setting methods can be realized.

[0030] See Figure 1 , for the vacuum pump system for drying wet materials in the drying oven provided by the present application, the vacuum pump system is connected to the exhaust port pipeline of the condenser 4; the drain port of the condenser 4 is connected to the receiving tank 5; the condenser 4 is connected to the exhaust port pipeline of the drying oven 3; the materials in the drying oven 3 are set by the conventional methods of those skilled in the art and will not be elaborated here;

[0031] The vacuum pump system includes: a flow meter 62, a branch pipe, a Roots vacuum pump 6, a water ring vacuum pump 7, and a vacuum water tank 51; the liquid discharge port of the condenser 4 is communicated with the liquid inlet pipe of the Roots vacuum pump 6; the liquid outlet of the Roots vacuum pump 6 is communicated with the water ring vacuum pump 7; one end of the branch pipe is communicated with the pipe connecting the condenser 4 and the Roots vacuum pump 6; the other end of the branch pipe is communicated with the pipe connecting the Roots vacuum pump 6 and the water ring vacuum pump 7. A branch valve 61 is arranged on the branch pipe. The inlet valve 52 and the flow meter 62 are arranged at intervals on the inlet pipe of the Roots vacuum pump 6.

[0032] The liquid inlet of the vacuum water tank 51 is communicated with the liquid outlet pipe of the water ring vacuum pump 7, and the liquid outlet of the vacuum water tank 51 is communicated with the liquid inlet pipe of the water ring vacuum pump 7, and the vacuum water tank 51 provides the liquid required for vacuum pumping for the water ring vacuum pump 7.

[0033] By arranging the branch pipe and the branch valve 61 thereon, the operator can judge whether it is necessary to open the branch valve 61 and close the inlet valve 52 according to the fluid flow rate entering the Roots vacuum pump 6, so as to ensure the normal directional pumping of the air flow and avoid damage to the Roots vacuum pump 6 caused by excessive moisture content in the gas in the initial stage of drying.

[0034] In a specific embodiment, the drying system mainly includes: a drying oven 3, a heating system, a vacuum reduction system, and a condenser. During operation, the wet material containing a solvent (alcohol, n-hexane or moisture) is coated in the drying oven 3, and the heating system provides heat for the drying oven 3. After the wet material is heated, the solvent vaporizes to form an aerosol and volatilizes into the condenser, where it is cooled and liquefied and collected in the solvent receiving tank 5. The aerosol that cannot be liquefied enters the series-connected Roots vacuum pump 6 and water ring vacuum pump 7 through the pipeline of the vacuum reduction system for pressure reduction and liquefaction. At the same time, it is ensured that the moisture in the drying oven 3 can be continuously discharged from the drying oven 3 to ensure the drying efficiency.

[0035] When drying the wet material in the drying oven, the equipment operation has the following characteristics: Since in the early stage of equipment operation, the solvent volatilization amount in the aerosol is large, and the vacuum degree requirement is not high. And because the Roots vacuum pump 3 has a precise structure, if air containing a solvent or moisture enters during use, it will affect the use effect and even damage the Roots vacuum pump 3.

[0036] Through this vacuum system, it is possible to avoid the direct entry of the gas flow in the condensation section into the Roots vacuum pump when the solvent content is relatively high in the early stage.

[0037] During the production operation process, when a relatively large amount of solvent moisture volatilizes in the current stage and the vacuum requirement is not high during drying, close the valve on the Roots vacuum pump 6, and open the valve in the middle pipeline connecting the Roots vacuum pump 6 and the water ring vacuum pump 7. In this way, the gas with a high content of solvent and moisture aerosol bypasses the Roots vacuum pump 6 and enters the water ring vacuum pump 7; avoid the gas with a high content of solvent and moisture aerosol from entering the Roots vacuum pump 6. When the content of solvent and moisture aerosol is low in the later stage and a higher vacuum needs to be increased, open the liquid inlet valve 52 and the branch valve 61 on the Roots vacuum pump 6 to increase the vacuum degree. In this way, the purpose of improving the equipment is achieved, which is to reduce the damage rate of the Roots vacuum pump 6 and the usage cost of the vacuum pump system.

[0038] In a specific embodiment, the heating system includes: a water tank 11, an electric heater 1, and a hot water pump 2; an electric heater 1 is installed for heating inside the water tank 11; the electric heater 1 is used to heat the water in the water tank 11, and the heated water is introduced as a heating medium into the heat exchanger in the drying oven 3 to heat the slurry.

[0039] The water outlet of the water tank 11 is connected to the pipeline of the water inlet of the heat exchanger on the drying oven 3; a hot water pump 2 is arranged on the pipeline connecting the heat exchanger and the water tank 11. The hot water is pumped by the hot water pump 2 to raise the temperature of the drying oven 3, realizing the drying of the slurry.

[0040] In a specific embodiment, the heating system includes: a hot water valve 21; the hot water valve 21 is arranged at intervals with the hot water pump 2 on the pipeline connecting the water outlet of the water tank 11 and the water inlet of the heat exchanger on the drying oven 3.

[0041] In a specific embodiment, the water inlet of the water tank 11 is connected to the pipeline of the water outlet of the heat exchanger on the drying oven 3, thereby realizing the circulation of the heating medium in the heat exchanger.

[0042] In a specific embodiment, it includes: a condenser 4, a circulating water tank 43, and a circulating pump 44; a circulating interlayer is arranged inside the condenser 4; the water inlet of the circulating interlayer is connected to the pipeline of the water outlet of the circulating water tank 43; the water outlet of the circulating interlayer is connected to the pipeline of the water inlet of the circulating water tank 43; the circulating pump 44 is arranged on the pipeline connecting the water outlet of the circulating interlayer and the water inlet of the circulating water tank 43.

[0043] In a specific embodiment, a circulating water inlet interface 41 and a circulating water storage interface 42 connected to the circulating interlayer are arranged on the outer wall of the condenser 4; the circulating water inlet interface 41 and the circulating water storage interface 42 are respectively connected to the inlet and outlet pipelines of the circulating water tank 43. Achieving the countercurrent of the flowing gas and the circulating liquid flow inside the condenser 4 can achieve a better solvent recovery efficiency.

[0044] In a specific embodiment, it includes: a vapor-liquid separator 54; the vapor-liquid separator 54 is arranged on the pipeline where the condenser 4 is connected to the Roots vacuum pump 6. To effectively separate the liquid in the airflow entering the Roots vacuum pump 6 and further protect the Roots vacuum pump 6.

[0045] The setting methods of the components not detailed in this application and their connection relationships are all conventional setting methods in the art.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A vacuum pump system for drying wet materials in a drying oven, characterized in that: The vacuum pump system is in communication with an exhaust pipe of the condenser (4); the air inlet of the condenser (4) is in communication with an exhaust pipe of the drying box (3); The vacuum pump system comprises: a liquid inlet valve (52), a Roots vacuum pump (6), a water ring vacuum pump (7), a branch pipe, and a branch pipe valve (61); The air inlet of the Roots vacuum pump (6) is connected to the exhaust pipe of the condenser (4); the exhaust pipe of the Roots vacuum pump (6) is connected to the air inlet pipe of the water ring vacuum pump (7); the liquid inlet valve (52) is arranged on the liquid inlet pipe of the Roots vacuum pump (6); One end of the branch pipe is connected to a pipeline connected to an air inlet of a Roots vacuum pump (6) and an exhaust port of a condenser (4); The other end of the branch pipe is connected to a pipeline connected to the exhaust port of the Roots vacuum pump (6) and the air inlet of the water ring vacuum pump (7); The branch pipe valve (61) is arranged on the branch pipe.

2. The vacuum pump system for drying wet materials in a drying oven according to claim 1, characterized in that: include: A flow meter (62); the flow meter (62) is arranged on the liquid inlet pipe of the Roots vacuum pump (6).

3. The vacuum pump system for drying wet materials in a drying oven according to claim 1, characterized in that: include: A vapor-liquid separator (54); the vapor-liquid separator (54) is arranged on the liquid inlet pipe of the Roots vacuum pump (6).

4. The vacuum pump system for drying wet materials in a drying oven according to claim 1, characterized in that: include: Heating system; A heat exchanger is arranged in the drying box (3); The heating system comprises: an electric heating water tank; a liquid outlet of the electric heating water tank is connected with a liquid inlet pipeline of a heat exchanger; and a liquid inlet of the electric heating water tank is connected with a liquid outlet pipeline of the heat exchanger.

5. The vacuum pump system for drying wet materials in a drying box according to claim 4, characterized in that: include: A hot water pump (2) and a hot water valve (21); the hot water pump (2) and the hot water valve (21) are arranged at intervals on a pipeline connecting a liquid outlet of the electric heating water tank and a liquid inlet of the heat exchanger.

6. The vacuum pump system for drying wet materials in a drying oven according to claim 1, characterized in that: include: A circulating water tank (43); a circulating interlayer is arranged in the side wall of the condenser (4); a water outlet of the circulating interlayer is in communication with a water inlet pipeline of the circulating water tank (43); and a water inlet of the circulating interlayer is in communication with a water outlet pipeline of the circulating water tank (43).

7. The vacuum pump system for drying wet materials in a drying oven according to claim 6, characterized in that: include: Circulating pump (44); the circulating pump (44) is arranged on a pipeline connecting the water inlet of the circulating interlayer and the water outlet of the circulating water tank (43).

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