Concentration measuring device for production of N-ethyl-N-cyanoethylaniline

Abstract

The utility model provides a concentration measuring device for production of N-ethyl-N-cyanoethylaniline, which comprises a measuring mechanism, the measuring mechanism is mounted on the surface of an external rectifying still, and the measuring mechanism is communicated with the inside of the rectifying still; the measuring mechanism comprises a communicating pipe, two ends of the communicating pipe are respectively provided with a lower drainage pipe and an upper drainage pipe, and the lower drainage pipe and the upper drainage pipe are respectively communicated with the lower part and the upper part of the rectifying still. When the rectifying still is used, the communicating pipe is arranged on the side face of the rectifying still, and the lower drainage pipe and the upper drainage pipe are communicated with the interior of the rectifying still, so that raw materials in the rectifying still can be circulated to the interior of the communicating pipe and then are connected with the laser generator and the spectrum analyzer through the optical fiber connecting flanges on the wiring terminals respectively; the laser emitting and receiving head emits laser to the raw material and receives the reflected spectrum, and the spectrum analyzer is used for measuring the concentration, so that the effects of measuring the concentration at any time and being simple in measuring mode are achieved.

Description

Technical Field

[0001] This utility model relates to the field of N-ethyl-N-cyanoethyl aniline concentration determination technology, and in particular to a concentration determination device for the production of N-ethyl-N-cyanoethyl aniline. Background Technology

[0002] In the production of N-ethyl-N-cyanoethylaniline, distillation or rectification is often used for purification. The purification of N-ethyl-N-cyanoethylaniline requires the determination of its concentration. Based on the measured concentration, it is determined whether to continue rectification or stop and output the product.

[0003] Existing N-ethyl-N-cyanoethylaniline concentration measuring devices generally require stopping the reaction in the distillation vessel before measurement can be performed, and multiple samples need to be taken during the measurement to determine the concentration, making the operation relatively cumbersome.

[0004] Therefore, this application proposes a concentration measuring device for the production of N-ethyl-N-cyanoethyl aniline to improve the convenience of measuring the concentration of N-ethyl-N-cyanoethyl aniline. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a concentration measuring device for the production of N-ethyl-N-cyanoethyl aniline, so as to solve the problem that concentration measurement is inconvenient in the production process of N-ethyl-N-cyanoethyl aniline in the prior art.

[0006] To achieve the above and other related objectives, this utility model provides a concentration measuring device for the production of N-ethyl-N-cyanoethyl aniline, including a measuring mechanism, which is installed on the surface of an external distillation vessel and is connected to the interior of the distillation vessel.

[0007] The measuring mechanism includes a connecting pipe, with a lower drain pipe and an upper drain pipe respectively provided at both ends of the connecting pipe, and the lower drain pipe and the upper drain pipe are respectively connected to the lower part and the upper part of the distillation kettle;

[0008] A connecting pipe is provided on the side of the connecting pipe, a terminal is provided at one end of the connecting pipe, and a laser emitting receiver is provided at the other end of the connecting pipe. The laser emitting receiver is in communication with the interior of the connecting pipe.

[0009] The terminal block is provided with an optical fiber connection flange at its end, and the optical fiber connection flange is coupled to the laser transmitter and receiver head.

[0010] Preferably, there are two laser transmitter / receiver heads and two fiber optic connection flanges, with each laser transmitter / receiver head and each fiber optic connection flange having a single connection.

[0011] Preferably, a flow-stopping pipe is provided on the connecting pipe opposite to the connecting pipe, and the flow-stopping pipe is in communication with the interior of the connecting pipe.

[0012] Preferably, the outer surface of the laser transmitter and receiver head is provided with a protective cover, and the outer surface of the laser transmitter and receiver head is flush with the inner wall of the connecting pipe.

[0013] Preferably, the upper part of the connecting pipe extends upward beyond the height of the upper drainage pipe, and a through hole is provided at the top axis of the connecting pipe.

[0014] Preferably, a circulation mechanism is installed on the connecting pipe, which can drive the N-ethyl-N-cyanoethyl aniline raw material inside the connecting pipe.

[0015] Preferably, the circulation mechanism includes a push rod that passes through the top of the connecting pipe and extends into the interior of the connecting pipe. A piston head is provided at the lower end of the push rod, and the outer surface of the piston head is in contact with the inner wall of the connecting pipe.

[0016] Preferably, the circulation mechanism further includes a support base, which is installed on the outer surface of the distillation vessel. A telescopic rod is installed on the support base, and the upper end of the telescopic rod is connected to the upper end of the push rod.

[0017] Preferably, the telescopic rod is one of an electric, pneumatic, or hydraulic telescopic rod.

[0018] Preferably, the piston head moves within the connecting pipe at a distance not less than half the length of the connecting pipe.

[0019] As described above, the concentration measuring device for the production of N-ethyl-N-cyanoethyl aniline of this invention has the following beneficial effects:

[0020] 1. This utility model provides a connecting pipe on the side of the distillation vessel, which is connected to the interior of the distillation vessel via a lower and upper drain pipe. This allows the raw material in the distillation vessel to circulate into the connecting pipe. The raw material is then connected to a laser generator and a spectrometer via fiber optic flanges on the terminals. The laser emitter and receiver head emits laser light into the raw material and receives the reflected spectrum. The spectrometer is used to determine the concentration, achieving the effect of being able to measure the concentration at any time and with a simple measurement method.

[0021] 2. This utility model installs a piston head inside the connecting pipe, and the piston head can be driven to move inside the connecting pipe by the cooperation of a push rod and a telescopic rod. During the detection process, the raw material in the connecting pipe can be discharged by the up and down movement of the piston head, and new raw material can be drawn into the connecting pipe for measurement, thereby improving the accuracy of the measurement.

[0022] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value. Attached Figure Description

[0023] Figure 1 The diagram shown is an installation schematic of this utility model.

[0024] Figure 2 The diagram shows the installation cross-sectional view of this utility model and the distillation vessel.

[0025] Figure 3 The diagram shown is a structural schematic of this utility model.

[0026] Figure 4 The diagram shown is a cross-sectional view of the structure of this utility model.

[0027] Figure 5 The diagram shown is a structural schematic of the laser transmitter and receiver head of this utility model.

[0028] Figure 6 The diagram shown is a cross-sectional view of the terminal block of this utility model.

[0029] Component designation explanation:

[0030] 1. Distillation vessel; 2. Measuring mechanism; 201. Connecting pipe; 202. Lower drain pipe; 203. Upper drain pipe; 204. Connecting pipe; 205. Terminal block; 206. Fiber optic connection flange; 207. Laser transmitter and receiver head; 208. Cut-off pipe; 3. Circulation mechanism; 301. Support base; 302. Telescopic rod; 303. Push rod; 304. Piston head. Detailed Implementation

[0031] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0032] Please see Figures 1 to 6 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0033] like Figures 1-2 As shown, this utility model provides a concentration measuring device for the production of N-ethyl-N-cyanoethyl aniline, including a measuring mechanism 2. The measuring mechanism 2 is installed on the surface of an external distillation vessel 1 and is connected to the interior of the distillation vessel 1. During the distillation of N-ethyl-N-cyanoethyl aniline raw material, a portion of the raw material enters the measuring mechanism 2, where its concentration is measured by the equipment on the measuring mechanism 2.

[0034] Specifically, the measuring device 2 includes a connecting pipe 201, with a lower drain pipe 202 and an upper drain pipe 203 at its two ends. The lower drain pipe 202 and the upper drain pipe 203 are connected to the lower and upper parts of the distillation vessel 1, respectively, forming a communicating vessel with the interior of the distillation vessel 1. The N-ethyl-N-cyanoethyl aniline feedstock in the distillation vessel 1 enters the interior of the connecting pipe 201 through the lower drain pipe 202 and the upper drain pipe 203 for temporary retention.

[0035] A connecting pipe 204 is provided on the side of the connecting pipe 201. A terminal block 205 is provided at one end of the connecting pipe 204, and a laser emission receiver 207 is provided at the other end of the connecting pipe 204. The laser emission receiver 207 is internally connected to the connecting pipe 201. A fiber optic connection flange 206 is provided at the end of the terminal block 205, and the fiber optic connection flange 206 is coupled to the laser emission receiver 207. During concentration measurement, the laser is connected to the laser generator and the spectrometer via the fiber optic connection flange 206. The laser light generated by the laser generator is transmitted through the fiber optic connection flange 206 and a jumper to the laser emission receiver 207, which directs the light towards N-ethyl-N-cyanoethyl aniline and generates reflected light. The laser emission receiver 207 receives the reflected light and transmits it through the jumper and fiber optic connection flange 206 to the spectrometer for spectral analysis, thereby determining the concentration of N-ethyl-N-cyanoethyl aniline. The results detected by the spectrometer are displayed on a monitor, and recorded data is generated for querying.

[0036] To further improve the production efficiency of N-ethyl-N-cyanoethyl aniline, an external spectrometer can be linked to the heating device inside the distillation vessel 1 for rectification. When the concentration of N-ethyl-N-cyanoethyl aniline is low, the heating temperature of the heating device can be appropriately increased to improve the distillation efficiency. When the concentration of N-ethyl-N-cyanoethyl aniline is within acceptable limits, the heating device temperature can be appropriately reduced or heating can be stopped.

[0037] like Figure 3 , Figure 5 and Figure 6As shown, in some embodiments, the present invention uses two laser emitter / receiver heads 207 and two fiber optic connecting flanges 206, with each laser emitter / receiver head 207 and each fiber optic connecting flange 206 connected in a single manner. One of the two laser emitter / receiver heads 207 is used to emit laser light, and the other is used to receive the reflected laser light. One of the two fiber optic connecting flanges 206 is connected to the laser generator, and the other is connected to a spectrometer. When determining the concentration, the spectrometer analyzes the spectrum of the reflected laser light to determine the proportion of N-ethyl-N-cyanoethylaniline in the composition. Its detection principle is similar to Raman spectroscopy. The measured spectrum primarily detects the characteristic functional groups of N-ethyl-N-cyanoethylaniline.

[0038] like Figures 2-4 As shown, in some embodiments, a flow-blocking pipe 208 is provided on the connecting pipe 201 opposite to the connecting pipe 204, and the flow-blocking pipe 208 is in communication with the interior of the connecting pipe 201. After the N-ethyl-N-cyanoethyl aniline raw material enters the interior of the connecting pipe 201, the flow-blocking pipe 208 can increase the cross-sectional area of ​​the N-ethyl-N-cyanoethyl aniline raw material, thereby improving the accuracy of the measurement. This avoids the situation where the internal cross-sectional diameter of the connecting pipe 201 is small, making the laser susceptible to interference from the interior of the connecting pipe 201.

[0039] like Figure 5 As shown, in some embodiments, a protective cover is provided on the outer surface of the laser emitter / receiver head 207 of this invention, and the outer surface of the laser emitter / receiver head 207 is flush with the inner wall of the connecting pipe 201. The protective cover can prevent the laser emitter / receiver head 207 from being worn by the flowing N-ethyl-N-cyanoethylaniline raw material and its internal impurities. Furthermore, the flushness of the protective cover and the laser emitter / receiver head 207 with the inner wall of the connecting pipe 201 can prevent impurities from accumulating at the laser emitter / receiver head 207, thus avoiding any impact on the emitted light and received reflected light.

[0040] like Figure 4 As shown, in some embodiments, the upper part of the connecting pipe 201 extends upward beyond the height of the upper drain pipe 203, and a through hole is provided at the top axis of the connecting pipe 201. The through hole is provided to facilitate the application of pressure to the inside of the connecting pipe 201, thereby allowing the N-ethyl-N-cyanoethyl aniline raw material in the connecting pipe 201 to flow into the distillation kettle 1, increasing the circulation of the N-ethyl-N-cyanoethyl aniline raw material and improving the accuracy of concentration measurement.

[0041] like Figure 3 and Figure 4As shown, in some embodiments, a circulation mechanism 3 is installed on the connecting tube 201 of this invention. The circulation mechanism 3 can drive the N-ethyl-N-cyanoethyl aniline raw material inside the connecting tube 201. During concentration measurement, the N-ethyl-N-cyanoethyl aniline raw material in the connecting tube 201 is intermittently discharged through the circulation mechanism 3, and new N-ethyl-N-cyanoethyl aniline is introduced. This is to avoid the N-ethyl-N-cyanoethyl aniline raw material in the connecting tube 201 failing to achieve real-time concentration measurement due to poor flowability.

[0042] like Figure 4 As shown, in some embodiments, the circulation mechanism 3 of this utility model includes a push rod 303, which penetrates the top of the connecting pipe 201 and extends into the interior of the connecting pipe 201. A piston head 304 is provided at the lower end of the push rod 303, and the outer surface of the piston head 304 is in contact with the inner wall of the connecting pipe 201. When the push rod 303 is driven to move up and down, the piston head 304 moves up and down accordingly, thereby pressurizing and extracting the N-ethyl-N-cyanoethyl aniline raw material in the connecting pipe 201. During pressurization, the N-ethyl-N-cyanoethyl aniline raw material is discharged into the interior of the distillation vessel 1 through the lower drain pipe 202 and the upper drain pipe 203. During extraction, the N-ethyl-N-cyanoethyl aniline raw material enters the interior of the connecting pipe 201 through the lower drain pipe 202 and the upper drain pipe 203 to renew the N-ethyl-N-cyanoethyl aniline raw material. Furthermore, by simultaneously drawing N-ethyl-N-cyanoethyl aniline raw material through the lower drain pipe 202 and the upper drain pipe 203, the raw materials in the lower and upper layers of the distillation vessel 1 can be mixed, improving the accuracy of concentration measurement. Also, when the piston head 304 passes the laser emitter / receiver head 207, the protective cover outside the laser emitter / receiver head 207 can be wiped, improving the cleanliness of the protective cover.

[0043] like Figures 1-4 As shown, in some embodiments, the circulation mechanism 3 of this utility model further includes a support base 301, which is installed on the outer surface of the distillation vessel 1. A telescopic rod 302 is installed on the support base 301, and the upper end of the telescopic rod 302 is connected to the upper end of the push rod 303. When the telescopic rod 302 is driven, it will drive the push rod 303 to move accordingly, thereby realizing extraction. The telescopic rod 302 can be one of electric, pneumatic, or hydraulic telescopic rods, which is set according to actual needs.

[0044] It should be noted that the travel distance of the piston head 304 inside the connecting pipe 201 is not less than half the length of the connecting pipe 201. This allows most of the N-ethyl-N-cyanoethylaniline raw material to be discharged from the connecting pipe 201 when pressure is applied. Furthermore, when the piston head 304 passes the laser emitter / receiver head 207, it can wipe the protective cover of the laser emitter / receiver head 207, improving the cleanliness of the protective cover.

[0045] In summary, the concentration measuring device for the production of N-ethyl-N-cyanoethyl aniline of this invention, by setting a connecting pipe 201 on the side of the distillation kettle 1 and connecting it to the inside of the distillation kettle 1 through the lower drain pipe 202 and the upper drain pipe 203, allows the raw material in the distillation kettle 1 to circulate into the inside of the connecting pipe 201. Then, it is connected to a laser generator and a spectrometer respectively through the optical fiber connecting flange 206 on the terminal 205. The laser emitter and receiver head 207 emits laser light into the raw material and receives the reflected spectrum. The concentration is measured by the spectrometer, achieving the effect of being able to measure the concentration at any time and having a simple measurement method.

[0046] Meanwhile, this utility model installs a piston head 304 inside the connecting pipe 201, and the piston head 304 can be driven to move inside the connecting pipe 201 by the cooperation of the push rod 303 and the telescopic rod 302. During the detection process, the raw material in the connecting pipe 201 can be discharged by the up and down movement of the piston head 304, and new raw material can be drawn into the connecting pipe 201 for measurement, thereby improving the accuracy of the measurement.

[0047] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0048] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A concentration measuring device for the production of N-ethyl-N-cyanoethyl aniline, characterized in that, The application relates to a distillation kettle measuring device, which comprises a measuring device (2) installed on the surface of an external distillation kettle (1) and communicating with the inside of the distillation kettle (1). The measuring device (2) comprises a communicating pipe (201) with a lower drainage pipe (202) and an upper drainage pipe (203) arranged at the two ends of the communicating pipe (201) respectively, and the lower drainage pipe (202) and the upper drainage pipe (203) communicate with the lower part and the upper part of the distillation kettle (1) respectively. A connecting pipe (204) is arranged on the side of the communicating pipe (201), one end of the connecting pipe (204) is provided with a terminal (205), the other end of the connecting pipe (204) is provided with a laser emission receiving head (207), and the laser emission receiving head (207) penetrates the inside of the communicating pipe (201). The end of the terminal (205) is provided with a fiber connection flange (206) which is coupled with the laser emission receiving head (207).

2. The apparatus for measuring concentration for producing N-ethyl-N- cyanoethyl aniline according to claim 1, characterized by: The number of the laser emission receiving head (207) and the fiber connection flange (206) is two, and each laser emission receiving head (207) and each fiber connection flange (206) is single communication.

3. The apparatus for measuring concentration for producing N-ethyl-N- cyanoethyl aniline according to claim 2, characterized by: A cut-off pipe (208) is arranged on the communicating pipe (201) opposite to the connecting pipe (204), and the cut-off pipe (208) penetrates the inside of the communicating pipe (201).

4. The apparatus for measuring concentration for producing N-ethyl-N- cyanoethyl aniline according to claim 1, characterized by: A protective cover is arranged on the outer surface of the laser emission receiving head (207), and the outer surface of the laser emission receiving head (207) is flush with the inner wall of the communicating pipe (201).

5. The apparatus for measuring concentration for producing N-ethyl-N-cyanoethyl- aniline according to claim 4, characterized by: The upper part of the communicating pipe (201) extends beyond the height of the upper drainage pipe (203), and a through hole is arranged in the top axis of the communicating pipe (201).

6. The apparatus for measuring concentration for producing N-ethyl-N-cyanoethyl- aniline according to claim 5, characterized by: A circulating mechanism (3) is arranged on the communicating pipe (201), and the circulating mechanism (3) can drive N-ethyl-N-cyanethyl aniline raw materials in the inside of the communicating pipe (201).

7. The apparatus for measuring concentration for producing N-ethyl-N-cyanoethyl- aniline according to claim 6, characterized by: The circulating mechanism (3) comprises a push rod (303) which penetrates the top of the communicating pipe (201) and extends into the inside of the communicating pipe (201), and the lower end of the push rod (303) is provided with a piston head (304), and the outer surface of the piston head (304) is attached to the inner wall of the communicating pipe (201).

8. The apparatus for measuring concentration for producing N-ethyl-N-cyanoethyl- aniline according to claim 7, characterized by: The circulating mechanism (3) further comprises a supporting seat (301) arranged on the outer surface of the distillation kettle (1), a telescopic rod (302) is arranged on the supporting seat (301), and the upper end of the telescopic rod (302) is connected with the upper end of the push rod (303).

9. The apparatus for measuring concentration for producing N-ethyl-N-cyanoethyl- aniline according to claim 8, characterized by: The telescopic rod (302) is one of an electric telescopic rod, a pneumatic telescopic rod and a hydraulic telescopic rod.

10. The apparatus for measuring concentration for producing N-ethyl-N-cyanoethyl- aniline according to claim 9, wherein: The moving stroke of the piston head (304) in the inside of the communicating pipe (201) is not less than half of the length of the communicating pipe (201).

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