Purification device for preparing benzene series standard substance

Abstract

The utility model relates to a purification device for preparing benzene series standard substances, which comprises a tower body, a plurality of layers of tower plates are arranged in the tower body, notches are arranged on one sides of the tower plates, overflow weirs are arranged at the notches of the tower plates, fluid channels are formed between the overflow weirs and the inner wall of the tower body, and the notches of two vertically adjacent tower plates are opposite in direction. A plurality of through holes are formed in the tower plate, round pipes are respectively connected in the through holes in a sliding manner, and a fixing frame is arranged at the bottoms of the round pipes. Through the arrangement of the tower plate, the overflow weir and the round pipe, the round pipe can upwards extend out of the through hole by a certain height, so that a part of solution can be reserved on the tower plate, the solution is prevented from being discharged downwards along with the through hole, upward steam passing through the round pipe can be effectively contacted with the solution, and the rectification efficiency is improved; after the top of the round pipe is flush with the upper surface of the tower plate, the retained solution can be discharged downwards through the round pipe and moves up and down along with the round pipe, so that the dredging rod can play a role in dredging and blocking prevention in the round pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to benzene series standard substance preparation technology especially a kind of purification device for benzene series standard substance preparation. BACKGROUND

[0002] Benzene series is one of the most important pollutants in air, including benzene, toluene, ethylbenzene, xylene and other substances, mainly from paint, solvent, adhesive volatilization, building decoration material release, fossil fuel such as petroleum, coal and organic matter such as wood, tobacco incomplete combustion and automobile exhaust emission, these substances have great harm to human body and environment, therefore, accurate analysis and monitoring benzene series have important significance for guaranteeing human health, promoting environmental safety, benzene series standard substance is the basis of quantity traceability and quality control, its accuracy and reliability directly affect the accuracy of benzene series monitoring result, by preparing and using high-quality benzene series standard substance, the accuracy and reliability of benzene series monitoring result can be ensured, and strong support is provided for environmental protection, occupational health and medical research and development fields.

[0003] Benzene series standard substance needs to select high-purity, non-pollution benzene series compound as raw material when preparing, through rectification, extraction, chromatographic separation and other technical means, raw material is fully purified, and impurities and interferents are removed, existing raw material for benzene series standard substance preparation is realized by rectification column when purifying rectification, gas-liquid two phases are contacted by countercurrent, present rectification column is not convenient to dredge steam through hole when raw material is rectified, is easy to block, and steam and liquid are not convenient to fully and effectively contact, and rectification efficiency is low. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of purification device for benzene series standard substance preparation, to solve the problem that the existing rectification column is not convenient to dredge steam through hole when raw material is rectified, is easy to block, and steam and liquid are not convenient to fully and effectively contact, and rectification efficiency is low.

[0005] In order to solve the above problems, the utility model provides a kind of purification device for benzene series standard substance preparation, including tower body, the tower body is equipped with multilayer tray, the side of tray is equipped with notch, the notch of tray is equipped with overflow weir, overflow weir and tower body inner wall form fluid passage, the notch of two adjacent trays is opened in opposite direction, a plurality of through holes are opened in tray, a plurality of through holes are respectively slidably connected with round tube, the bottom of a plurality of round tubes is equipped with fixing frame, a plurality of round tubes are all fixedly connected with fixing frame, the upside of tray is fixedly installed with connecting frame, the downside of connecting frame is fixed with a plurality of dredging rods corresponding to round tube, a plurality of dredging rods can be respectively inserted into corresponding round tube, the downside of fixing frame is fixedly connected with connecting rod, the bottom of connecting rod is fixedly connected with the upside of corresponding round tube below.

[0006] The purification device for preparing benzene series standard substance has the following technical features:

[0007] Further, the top of the tower body is provided with a gas outlet pipe, the bottom of the tower body is provided with a discharge pipe, one side of the tower body is provided with a feeding pipe, the top of the other side of the tower body is provided with a reflux pipe, and the bottom of the other side of the tower body is provided with an air inlet pipe.

[0008] Further, the top of one of the pipes on the uppermost tower plate is fixed with a pull rod, and the top of the pull rod extends out of the tower body.

[0009] Further, the top of the tower body is fixed with a support, the support is fixedly installed with a concave frame, the concave frame is fixedly installed with a hydraulic cylinder, the hydraulic cylinder is provided with a piston rod, and the bottom end of the piston rod is fixedly installed with the top end of the pull rod.

[0010] Further, the top end of the gas outlet pipe is connected with a condenser through a pipeline, and the liquid outlet of the condenser is connected with the reflux pipe of the tower body through one end of a three-way pipeline.

[0011] Further, the bottom end of the discharge pipe is connected with a reboiler through one end of a three-way pipeline, and the gas outlet of the reboiler is connected with the air inlet pipe through a pipeline.

[0012] The utility model has the advantages that: through the arrangement of the tower plate, the overflow weir and the pipe, the pipe can extend out of the through hole by a certain height, a part of the solution can be reserved on the tower plate, the solution can not be discharged along with the through hole, the upward steam of the pipe can effectively contact with the solution, the rectification efficiency is improved, the raw materials for preparing benzene series standard substance can be rectified, when the top of the pipe is flush with the upper surface of the tower plate after the pipe moves downward, the reserved solution can also be discharged along with the pipe, and the dredging rod can dredge and prevent the pipe from being blocked when the pipe moves up and down. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the axial measurement drawing of the rectification tower in the utility model embodiment;

[0014] Figure 2 It is the sectional view of the rectification tower in the utility model embodiment;

[0015] Figure 3 It is the structure drawing of the rectification tower without the tower body in the utility model embodiment;

[0016] Figure 4 It is the structure schematic view of the tower plate in the utility model embodiment;

[0017] Figure 5 It is the perspective view of the tower plate in the utility model embodiment;

[0018] Figure 6 The plane view of the embodiment of the present application;

[0019] Figure 7 The structure diagram of the broken rectifying tower in the embodiment of the present application. DETAILED DESCRIPTION

[0020] The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0021] As Figures 1 to 7 shown in the embodiment of the purification device for preparing benzene series standard substance of the present application, the purification device for preparing benzene series standard substance comprises a tower body 1, the tower body 1 is internally provided with multiple layers of tower plates 2, one side of the tower plate 2 is provided with a notch, the notch of the tower plate 2 is provided with an overflow weir 3, a fluid passage is formed between the overflow weir 3 and the inner wall of the tower body 1, the notch opening directions of two adjacent tower plates 2 are opposite, multiple through holes are formed in the tower plate 2, multiple circular tubes 4 are respectively and slidably connected in the multiple through holes, the bottom of the multiple circular tubes 4 is provided with a fixing frame 5, the multiple circular tubes 4 are all fixedly connected with the fixing frame 5, the upper side of the tower plate 2 is fixedly provided with a connecting frame 6, the lower side of the connecting frame 6 is fixedly provided with multiple dredging rods 7 corresponding to the multiple circular tubes 4, the multiple dredging rods 7 can be respectively inserted into the corresponding circular tubes 4, the lower side of the fixing frame 5 is fixedly provided with a connecting rod 8, the bottom of the connecting rod 8 is fixedly connected with the upper side of the corresponding circular tube 4 below, through the arrangement of the tower plate 2, the overflow weir 3 and the circular tube 4, the circular tube 4 can be extended upward through the through hole by a certain height, so that a part of the solution can be retained on the tower plate 2, so as to avoid the solution from being discharged through the through hole, so that the upward steam through the circular tube 4 can be effectively contacted with the solution, and the rectification efficiency is improved, after the circular tube 4 moves downward and the top of the circular tube 4 is flush with the upper surface of the tower plate 2, the retained solution can also be discharged through the circular tube 4, and with the upward and downward movement of the circular tube 4, the dredging rod 7 can dredge and prevent the circular tube 4 from being blocked.

[0022] In an embodiment of the present application, preferably, the top of the tower body 1 is provided with a gas outlet pipe 9, the bottom of the tower body 1 is provided with a discharge pipe 10, one side of the tower body 1 is provided with a feeding pipe 11, the top of the other side of the tower body 1 is provided with a reflux pipe 12, the bottom of the other side of the tower body 1 is provided with an air inlet pipe 13, the discharge pipe 10 can discharge the kettle residual liquid, part of the kettle residual liquid is discharged, and another part is added into the air inlet pipe 13 in the form of steam through the reboiler 19, the gas discharged through the gas outlet pipe 9 is condensed through the condenser 18 to produce distillate, part of the distillate is discharged, and another part reenters the tower body 1 through the reflux pipe 12.

[0023] In an embodiment of the present application, preferably, the top of one of the pipes 4 on the uppermost tray 2 is fixed with a pull rod 14, the top of the pull rod 14 extends out of the tower body 1, by moving the pull rod 14 up and down, the pipes 4 can be moved up or down.

[0024] In an embodiment of the present application, preferably, the top of the tower body 1 is fixed with a support 15, the support 15 is fixedly installed with a concave bracket 16, the concave bracket 16 is fixedly installed with a hydraulic cylinder 17, the hydraulic cylinder 17 is provided with a piston rod, the bottom end of the piston rod is fixedly installed with the top end of the pull rod 14, by starting the hydraulic cylinder 17, the pull rod 1 can be moved up or down through the piston rod.

[0025] In an embodiment of the present application, preferably, the top end of the gas outlet pipe 9 is connected with a condenser 18 through a pipeline, the liquid outlet of the condenser 18 is connected with the reflux pipe 12 of the tower body 1 through one end of a three-way pipeline.

[0026] In an embodiment of the present application, preferably, the bottom end of the discharge pipe 10 is connected with a reboiler 19 through one end of a three-way pipeline, the gas outlet of the reboiler 19 is connected with the gas inlet pipe 13 through a pipeline.

[0027] In use, the hydraulic cylinder 17 drives the pull rod 1 to move upwards, so that the pipe 4 extends out of the through hole by a certain height, so that a part of the solution can be left on the tray 2, avoiding the solution from being discharged with the through hole, so that the upward steam through the pipe 4 can effectively contact with the solution, improving the rectification efficiency, facilitating the rectification of raw materials for preparing benzene series standard substance, the feed pipe 11 feeds, the discharge pipe 10 can discharge the residual liquid in the kettle, part of the residual liquid in the kettle is discharged, another part of the residual liquid in the kettle is added into steam into the gas inlet pipe 13 through the reboiler 19, the gas discharged from the gas outlet pipe 9 is condensed by the condenser 18 to produce distillate, part of the distillate is discharged, and another part of the distillate reenters the tower body 1 through the reflux pipe 12, the gas-liquid two-phase contacts by countercurrent, heat and mass transfer between phases are carried out, the volatile components in the liquid phase enter the gas phase, the difficult-to-volatile components in the gas phase enter the liquid phase, so that almost pure volatile components can be obtained at the top of the tower, and almost pure difficult-to-volatile components can be obtained at the bottom of the tower, finally, the pipe 4 moves downwards, so that the top of the pipe 4 is flush with the upper surface of the tray 2, the remaining solution can also be discharged through the pipe 4, and the pipe 4 moves up and down, so that the pipe 4 can be dredged and prevented from being blocked by the dredging rod 7.

[0028] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, but not limited to; although the present application is described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still be modified to the technical solutions recorded in the foregoing examples, or part of the technical features are replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A purification apparatus for preparing benzene series standard substances, comprising a tower body (1), characterized in that, The tower body (1) is equipped with multiple tower plates (2). One side of the tower plate (2) has a notch. An overflow weir (3) is provided at the notch of the tower plate (2). A fluid channel is formed between the overflow weir (3) and the inner wall of the tower body (1). The notches of two adjacent tower plates (2) are opened in opposite directions. Multiple through holes are provided on the tower plate (2). A round tube (4) is slidably connected in the multiple through holes. A fixing frame (5) is provided at the bottom of the multiple round tubes (4). The multiple round tubes (4) are fixedly connected to the fixing frame (5). A connecting frame (6) is fixedly installed on the upper side of the tower plate (2). Multiple unblocking rods (7) corresponding to the round tubes (4) are fixed on the lower side of the connecting frame (6). The multiple unblocking rods (7) can be inserted into the corresponding round tubes (4) respectively. A connecting rod (8) is fixed on the lower side of the fixing frame (5). The bottom of the connecting rod (8) is fixedly connected to the upper side of the corresponding round tube (4) below.

2. The purification apparatus for preparing benzene series standard substances according to claim 1, characterized in that: The tower body (1) is provided with an air outlet pipe (9) at the top, a material outlet pipe (10) at the bottom, a material inlet pipe (11) on one side, a return pipe (12) at the top of the other side, and an air inlet pipe (13) at the bottom of the other side.

3. The purification apparatus for preparing benzene series standard substances according to claim 1, characterized in that: A tie rod (14) is fixed to the top of one of the round tubes (4) on the uppermost tower plate (2), and the top of the tie rod (14) extends out of the tower body (1).

4. The purification apparatus for preparing benzene series standard substances according to claim 3, characterized in that: The top of the tower body (1) is fixed with a support platform (15), a concave frame (16) is fixedly installed on the support platform (15), a hydraulic cylinder (17) is fixedly installed on the concave frame (16), a piston rod is provided inside the hydraulic cylinder (17), and the bottom end of the piston rod is fixedly installed with the top end of the pull rod (14).

5. The purification apparatus for preparing benzene series standard substances according to claim 2, characterized in that: The top of the gas outlet pipe (9) is connected to a condenser (18) via a pipe, and the liquid outlet of the condenser (18) is connected to the return pipe (12) of the tower body (1) via one end of a three-way pipe.

6. The purification apparatus for preparing benzene series standard substances according to claim 5, characterized in that: The bottom end of the discharge pipe (10) is connected to a reboiler (19) via a three-way pipe, and the outlet of the reboiler (19) is connected to the inlet pipe (13) via a pipe.

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