Air purging organic solvent concentrator and organic solvent concentration method

Abstract

The invention relates to an air purging organic solvent concentrator and an organic solvent concentration method.The air purging organic solvent concentrator comprises a volatilization cabinet, a sample container fixing frame, a jet head, an air pump and an exhaust pipe, and the sample container fixing frame is arranged in the volatilization cabinet and used for containing a sample container; the jet head is detachably arranged in the volatilization cabinet and is arranged above the sample container; an air supply pipe of the air pump is connected with the jet head; the exhaust pipe is connected with the volatilization cabinet; the volatilization of the organic solvent is accelerated by blowing the surface of the organic solvent liquid with air at a set speed, so that the device is suitable for volatilization and concentration of the organic solvent and is wide in application range; the jet head can be replaced and detached to prevent pollution; the operation is simple, the concentration efficiency is improved, and the environmental protection performance is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of laboratory instruments and equipment, and particularly relates to an air-purged organic solvent concentrator and an organic solvent concentrating method. Background Art

[0002] During laboratory operations, organic solvents often need to be volatilized and concentrated. Traditional volatilization and concentration methods include room-temperature volatilization and concentration and heated volatilization and concentration. Room-temperature volatilization and concentration suffer from long settling times, low volatilization efficiency, and the need for frequent observation to confirm the volatilization amount. Heated volatilization and concentration also require controlled heating temperature and power to prevent hazards. These methods also require specific laboratory locations, otherwise they can easily cause laboratory air pollution and have long-term health effects on laboratory personnel.

[0003] Therefore, there is an urgent need to develop a device and a method for concentrating organic solvents, which can improve the efficiency of volatilization and concentration of organic solvents and is simple to operate. Summary of the Invention

[0004] In response to at least one of the problems in the above-mentioned prior art, the purpose of the present invention is to provide an air-purged organic solvent concentrator and an organic solvent concentration method, which are easy to operate, improve concentration efficiency, and enhance environmental performance.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] An air-purged organic solvent concentrator, comprising:

[0007] The volatile cabinet has exhaust holes;

[0008] A sample container fixing rack is provided in the volatilization cabinet and is used for placing the sample container;

[0009] An air jet head is disassembled and arranged in the volatilization cabinet and above the sample container;

[0010] an air pump, the air supply pipe of which is connected to the air jet head;

[0011] An exhaust pipe has one end connected to the exhaust hole and the other end connected to an exhaust gas treatment device outside the laboratory.

[0012] Preferably, the air pump is provided with a controller, and the controller is used to adjust the air flow rate.

[0013] Preferably, a placement tray is provided in the volatilization cabinet, and the sample container fixing rack is provided on the placement tray.

[0014] Preferably, at least two branch air pipes are provided in the volatilization cabinet, one end of each branch air pipe is connected to the air supply pipe, and the other end is connected to one of the nozzles.

[0015] Preferably, the sample container fixing rack is provided with at least two sample container fixing positions, and one of the air jet heads is provided above each of the sample container fixing positions.

[0016] Preferably, a purge gas distribution fixed plate is provided in the volatile cabinet, and the purge gas distribution fixed plate is arranged above the placement plate and connected to the placement plate through a connecting rod; the multiple nozzles are detachably connected to the purge gas distribution fixed plate, and the multiple nozzles are evenly distributed along the circumference.

[0017] Preferably, a connecting hole is opened in the center of the purge gas distribution fixed plate, and the end of the air supply pipe is arranged in the connecting hole; and the end of the air supply pipe is connected to a multi-way gas distribution valve, an air hole is opened on the multi-way gas distribution valve, and a connecting pipe is set at the position of the air hole; one end of the branch air pipe is connected to one of the connecting pipes.

[0018] Preferably, the exhaust pipe is connected to the top of the rear side wall of the volatile storage cabinet.

[0019] A method for concentrating an organic solvent, based on the air-purged organic solvent concentrator described above, comprises the following steps:

[0020] Putting the sample containing the organic solvent to be concentrated into a sample container, and placing the sample container in the sample container fixing rack in the volatilization cabinet;

[0021] Installing the air jet head to a predetermined position above the surface of the organic solvent in the sample container;

[0022] Turning on the air pump so that the air supply pipe provides air to the nozzle, and the air is blown through the nozzle to sweep the surface of the sample liquid containing the organic solvent;

[0023] The sample containing the organic solvent in the sample container is volatilized into gas under the action of air flow and discharged through the exhaust pipe;

[0024] When the sample containing the organic solvent is concentrated to a set level, the air pump is turned off and the sample container containing the organic solvent is taken out.

[0025] Preferably, the flow rate of the air provided by the air pump is controlled by a controller;

[0026] The exhaust pipe is connected to the laboratory exhaust pipe so that the volatile gas of the sample containing organic solvent is discharged from the laboratory.

[0027] The present invention has the following advantages due to the adoption of the above technical solution:

[0028] 1. The air-purging organic solvent concentrator and organic solvent concentration method provided by the present invention adopt the method of blowing air on the surface of the organic solvent liquid to accelerate the volatilization of the organic solvent, are suitable for the volatilization and concentration of organic solvents, and have a wide range of applications; the air jet head can be replaced and disassembled to prevent pollution; the operation is simple, the concentration efficiency is improved, and the environmental performance is improved.

[0029] 2. The air-purged organic solvent concentrator and organic solvent concentration method provided by the present invention can control the air flow rate through a controller, thereby controlling the volatilization rate of the organic solvent.

[0030] 3. The air-purged organic solvent concentrator and organic solvent concentration method provided by the present invention can simultaneously concentrate multiple samples containing organic solvents, further improving the concentration efficiency.

[0031] 4. The air-purged organic solvent concentrator and organic solvent concentration method provided by the present invention are flexible in the way of placing samples containing organic solvents, and can be placed in a beaker or a test tube;

[0032] 5. The air-purged organic solvent concentrator and organic solvent concentration method provided by the present invention can have an exhaust pipe directly connected to the exhaust duct in the laboratory, so that the volatile gas of the organic solvent can be discharged from the laboratory through the volatilization cabinet and the exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a front view of a volatilization cabinet of an air-purged organic solvent concentrator provided in one embodiment of the present invention.

[0034] Figure 2 FIG. 1 is a rear view of a volatilization cabinet of an air-purged organic solvent concentrator provided in accordance with an embodiment of the present invention.

[0035] Figure 3 FIG. 1 is a perspective view of a volatilization cabinet of an air-purged organic solvent concentrator provided in accordance with an embodiment of the present invention.

[0036] Figure 4 The figure is a schematic structural diagram of a sample container fixing frame of an air-purged organic solvent concentrator provided in one embodiment of the present invention.

[0037] Figure 5 The present invention is a schematic structural diagram of a purge gas separation fixed plate of an air-purge organic solvent concentrator provided in one embodiment of the present invention.

[0038] Figure 6 The figure is a flow chart of an organic solvent concentration method provided by one embodiment of the present invention.

[0039] In the accompanying drawings:

[0040] 1. Volatilization cabinet, 2. Gas flow meter, 3. Air nozzle, 4. Connecting rod, 5. Exhaust hole, 6. Placement tray, 7. Purge gas distribution fixed plate, 8. Multi-way gas distribution valve, 9. Connecting pipe, 10. Cabinet door, 11. Glass window, 12. Gas supply pipe, 13. Sample container fixing rack. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "backward", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the system or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The direction of the arrows in the figures represents the direction of liquid flow.

[0043] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "assembly," "disposition," and "connection" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0044] The present invention provides an air-purged organic solvent concentrator and an organic solvent concentration method, which can purge a sample containing an organic solvent in a volatilization cabinet with air to volatilize it, and quickly volatilize and discharge the volatile gas; and avoid pollution through a detachable and replaceable air jet head; the instrument is easy to operate, improves concentration efficiency, and enhances environmental performance.

[0045] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0046] Example 1

[0047] Please refer to Figures 1 to 5The air-purged organic solvent concentrator provided in this embodiment includes a volatilization cabinet 1, a sample container holder 13, a nozzle 3, an air pump and an exhaust pipe. The volatilization cabinet 1 has an exhaust hole 5; the sample container holder is arranged in the volatilization cabinet 1 for placing the sample container; the nozzle 3 is removable and arranged in the volatilization cabinet 1 and is arranged above the sample container holder 13; the air supply pipe 12 of the air pump is connected to the nozzle head 3; one end of the exhaust pipe is connected to the exhaust hole 5, and the other end is connected to the exhaust gas treatment device outside the laboratory.

[0048] The sample container can be a beaker or a test tube for placing the sample containing the organic solvent to be concentrated. The exhaust pipe is used to discharge the volatile gas of the sample containing the organic solvent. The air pump is used to generate an air flow to purge the sample containing the organic solvent and accelerate its volatilization. The nozzle head 3 is removable and replaceable to prevent contamination. A gas flow meter 2 can be set on the volatilization cabinet 1, and the gas flow meter 2 is connected to the gas supply pipe 12.

[0049] like Figure 1 As shown, the volatilization cabinet 1 may be provided with an openable and closable cabinet door 10 , and a glass window 11 may be provided on the cabinet door 10 .

[0050] Specifically, the air pump is provided with a controller, which is used to adjust the air flow rate and control the volatilization rate of the sample containing the organic solvent.

[0051] Combine Figure 3 and Figure 4 As shown, specifically, a placement tray 6 is provided in the volatilization cabinet 1 , and the sample container fixing rack 13 can be fixedly disposed concentrically on the placement tray 6 .

[0052] Specifically, at least two branch air pipes are provided in the volatilization cabinet 1 , one end of each branch air pipe is connected to the air supply pipe 12 , and the other end thereof is connected to one of the air nozzles 3 .

[0053] Specifically, the sample container holder is configured with at least two sample container fixing positions, each of which is provided with a spray head 3 above the sample container fixing position. Multiple sample container holders can be used to accommodate multiple sample containers containing organic solvents. For example, if the number of branch air pipes, spray heads 3, and sample container fixing positions is set to twenty, the solvents in twenty sample containers containing organic solvents can be concentrated simultaneously.

[0054] Combine Figure 5 As shown, specifically, a purge gas separation fixed plate 7 is provided in the volatile cabinet 1, and the purge gas separation fixed plate 7 is arranged above the placement plate 6; a plurality of nozzle fixing holes are opened on the purge gas separation fixed plate 7, and a nozzle fixing tube is connected to the fixing hole. The nozzle fixing tube can tighten or loosen the nozzle head 3 through the top screw of the side wall so that the height can be adjusted up and down; the nozzle heads 3 are all detachably connected to the purge gas separation fixed plate 7, and the plurality of nozzle heads 3 are evenly distributed along the circumference.

[0055] The purge gas distribution fixed plate 7 and the placement plate 6 can be connected by vertical connecting rods 4. The connecting rods 4 are provided in at least three numbers and are evenly distributed along the circumference.

[0056] like Figure 4 and Figure 5 As shown, specifically, a connecting hole is opened in the center of the purge gas distribution fixed disk 7, and the end of the air supply pipe 12 is arranged in the connecting hole; and the end of the air supply pipe 12 is connected to the multi-way air distribution valve 8, the multi-way air distribution valve 8 has an air hole, and the multi-way air distribution valve 8 has an air channel, the air channel air inlet end of the multi-way air distribution valve 8 is connected to the air supply pipe 12, the air outlet end of the air channel is the air hole, and a connecting pipe 9 is arranged at the air hole position; one end of the branch air pipe is connected to a connecting pipe 9.

[0057] like Figure 5 As shown, the number of the sample container fixing frame 13, the air jet head 3, the branch air pipe, the joint pipe 9 and the air hole is equal and corresponds one to one.

[0058] like Figure 2 As shown, specifically, the exhaust pipe is connected to the top of the rear side wall of the volatile cabinet 1.

[0059] Example 2

[0060] like Figure 6 As shown, a method for concentrating an organic solvent is performed based on the air-purged organic solvent concentrator provided in Example 1, comprising the following steps:

[0061] Step S1: placing a sample containing an organic solvent to be concentrated into a sample container, and placing the sample container in the sample container fixing rack 13 in the volatilization cabinet 1;

[0062] Step S2, installing the air jet head 3 to a predetermined position above the surface of the organic solvent in the sample container holder;

[0063] Step S3, turning on the air pump so that the air supply pipe 12 provides air to the nozzle 3, and the air is blown through the nozzle 3 to sweep the surface of the sample liquid containing the organic solvent;

[0064] Step S4: the sample containing the organic solvent in the sample container is volatilized into gas under the action of air flow and discharged through the exhaust pipe;

[0065] Step S5: When the sample containing the organic solvent is concentrated to the desired level, turn off the air pump and take out the sample container containing the organic solvent.

[0066] Specifically, in step S3, the flow rate of the air provided by the air pump is controlled by the controller;

[0067] In step S4, the exhaust pipe is connected to the laboratory exhaust pipe so that the volatile gas of the sample containing organic solvent is discharged from the laboratory.

[0068] Specifically, in step S1, the solution of the organic solvent to be volatilized is placed in a beaker, test tube, or centrifuge tube of appropriate volume, for example, the beaker has a volume of 50 mL, or the test tube or centrifuge tube has a volume of 5 mL; then, the door of the volatilization cabinet 1 is opened, and the beaker, test tube, or centrifuge tube containing the solution is placed on the placement tray 6 of the volatilization cabinet 1.

[0069] In step S2, a disposable nozzle is installed on the air jet head 3, and the height of the air jet head 3 is adjusted so that the nozzle opening is 1 cm away from the liquid surface of the solution.

[0070] In step S3, the door of the volatilization cabinet 1 is closed, the gas flow meter is turned off, and the power of the concentrator is turned on; the gas flow meter is slowly adjusted to make the air flow from the nozzle reach the set flow rate.

[0071] In step S5, after the organic solvent in the solution is volatilized and the solution is concentrated to a set volume, the gas flow meter is turned off and the beaker, test tube or centrifuge tube is taken out.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An air-purged organic solvent concentrator, characterized in that: include: The volatile storage cabinet (1) is provided with an exhaust hole (5); A sample container fixing rack (13), arranged in the volatilization cabinet (1) and used for placing the sample container; An air jet head (3) is disassembled and arranged in the volatilization cabinet (1) and is arranged above the sample container; An air pump, whose air supply pipe (12) is connected to the air jet head (3); An exhaust pipe has one end connected to the exhaust hole (5) and the other end connected to an exhaust gas treatment device outside the laboratory.

2. The air-purged organic solvent concentrator according to claim 1, characterized in that: The air pump is provided with a controller, and the controller is used to adjust the air flow rate.

3. The air-purged organic solvent concentrator according to claim 1, characterized in that: A placement tray (6) is provided in the volatilization cabinet (1), and the sample container fixing rack (13) is provided on the placement tray (6).

4. The air-purged organic solvent concentrator according to claim 3, characterized in that: At least two branch air pipes are provided in the volatilization cabinet (1), one end of each branch air pipe is connected to the air supply pipe (12), and the other end is connected to one of the nozzles (3).

5. The air-purged organic solvent concentrator according to claim 4, characterized in that: The sample container fixing frame (13) is provided with at least two sample container fixing positions, and an air jet head (3) is provided above each of the sample container fixing positions.

6. The air-purged organic solvent concentrator according to claim 4, characterized in that: A purge gas distribution fixed plate (7) is provided in the volatile cabinet (1), and the purge gas distribution fixed plate (7) is provided above the placement plate (6) and is connected to the placement plate (6) via a connecting rod (4); a plurality of the nozzles (3) are detachably connected to the purge gas distribution fixed plate (7), and the plurality of the nozzles (3) are evenly distributed along the circumference.

7. The air-purged organic solvent concentrator according to claim 6, characterized in that: A connection hole is provided at the center of the purge gas distribution fixed plate (7), and the end of the gas supply pipe (12) is arranged in the connection hole; and the end of the gas supply pipe (12) is connected to a multi-way gas distribution valve (8), and the multi-way gas distribution valve (8) is provided with an air hole, and a joint pipe (9) is provided at the position of the air hole; one end of each branch gas pipe is connected to one of the joint pipes (9).

8. The air-purged organic solvent concentrator according to any one of claims 1 to 7, characterized in that: The exhaust pipe is connected to the top of the rear side wall of the volatile cabinet (1).

9. A method for concentrating an organic solvent, based on the air-purged organic solvent concentrator according to any one of claims 1 to 8, characterized in that: The following steps are involved: The sample containing the organic solvent to be concentrated is placed in a sample container, and the sample container is placed in the sample container fixing rack (13) in the volatilization cabinet (1); Installing the spray head (3) to a predetermined position above the surface of the organic solvent in the sample container; Turning on the air pump so that the air supply pipe (12) provides air to the nozzle (3), and the air is blown through the nozzle (3) to sweep the surface of the sample liquid containing the organic solvent; The sample containing the organic solvent in the sample container is volatilized into gas under the action of air flow and discharged through the exhaust pipe; When the sample containing the organic solvent is concentrated to a set level, the air pump is turned off and the sample container containing the organic solvent is taken out.

10. The method for using the air-purged organic solvent concentrator according to claim 9, characterized in that: controlling the flow rate of air provided by the air pump through a controller; The exhaust pipe is connected to the laboratory exhaust pipe so that the volatile gas of the sample containing organic solvent is discharged from the laboratory.

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