High-efficiency distillation safety device for solvent of imine product

Abstract

The utility model belongs to the technical field of production of imine products, and particularly relates to an efficient solvent distillation safety device for imine products. Comprising a distillation still, the top of the distillation still is connected with a condenser, the condenser is respectively connected with the distillation still and a solvent metering tank through a reflux ratio controller, the distillation still is provided with a temperature control device, the reflux ratio controller is connected with the distillation still through a reflux pipeline, and the reflux pipeline is provided with a sampling pipeline. And the reflux ratio controller controls the liquid flow between the distillation kettle and the condenser by adjusting the reflux ratio, and the reflux and extraction ratio can be randomly set, so that the solvent can be completely evaporated from imine products. And the reflux ratio controller is connected with a DCS (Distributed Control System) to realize automatic control. The sampling pipeline is arranged on the reflux pipeline for sampling detection, so that the percentage of the solvent in the imine product can be detected, and the distillation condition and progress can be conveniently controlled.

Description

TECHNICAL FIELD

[0001] The utility model belongs to imine product production technical field, specifically related to imine product's solvent high -efficient distillation safety device. BACKGROUND

[0002] In the production process of imine product, solvent distillation is a crucial link. The end point judgment problem of solvent distillation is particularly prominent. Because imine product and solvent are connected and cooperated by distillation kettle, condenser and solvent collecting tank in the distillation process, the collected solvent is difficult to accurately judge whether the solvent has been completely distilled. This uncertainty not only affects the purity of the product, but also may lead to solvent residue, and further affect the subsequent use and performance of the product. Secondly, the problem of low efficiency caused by long time distillation cannot be ignored. In order to ensure that the solvent is distilled completely, imine solvent distillation often needs to consume a lot of time to complete, which not only increases the production cost, but also limits the overall efficiency of the production line. Especially in large-scale production, the long time distillation process is the key factor restricting the production capacity. In addition, the thermal stability of imine product is poor, and the heating rate is too fast or the temperature is too high, which may lead to its decomposition or other side reactions. Therefore, the control of distillation process becomes particularly difficult, and accurate temperature control is needed to ensure the quality and safety of the product.

[0003] In summary, the existing imine product solvent distillation process has multiple problems such as end point judgment difficulty, low efficiency and process control difficulty. These problems restrict the production efficiency and quality improvement of imine product. Therefore, it is urgent to develop a solvent distillation device to solve these problems and realize the efficient, safe and low-cost production of imine product. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of solvent high-efficiency distillation safety devices of imine product to solve multiple problems such as end point judgment difficulty, low efficiency and process control difficulty in the solvent distillation process of imine product.

[0005] To solve the above problems, the technical scheme of the utility model is:

[0006] The solvent high-efficiency distillation safety device of imine product, including distillation kettle, distillation kettle top is connected with condenser, condenser is connected with distillation kettle and solvent metering tank respectively by reflux ratio controller, temperature control device is equipped on the distillation kettle, reflux ratio controller is connected with distillation kettle by reflux pipeline, sampling pipeline is opened on the reflux pipeline.

[0007] The reflux ratio controller controls the liquid flow between the distillation kettle and the condenser by adjusting the reflux ratio, and the proportion of reflux and extraction can be set arbitrarily, so that the solvent can be evaporated completely from the imine product. The reflux ratio controller is connected with the DCS to realize automatic control.

[0008] A sampling pipeline is arranged on the reflux pipeline for sampling detection, so that the percentage of solvent contained in the imine product can be detected, and the distillation conditions and progress can be controlled.

[0009] Further, the temperature control device comprises a kettle temperature transmitter arranged on the distillation kettle, a jacket arranged outside the distillation kettle, a jacket pressure transmitter arranged on the jacket, and the jacket is connected with a steam pipeline, a cooling water inlet pipeline, a cooling water return pipeline, the bottom of the jacket is connected with an air pressure pipeline, a cooling water outlet pipeline and a condensate water outlet pipeline, the steam pipeline is provided with a steam valve, and the cooling water inlet pipeline, the cooling water return pipeline, the air pressure pipeline, the cooling water outlet pipeline and the condensate water outlet pipeline are all provided with valves.

[0010] The steam in the jacket is condensed and flows out from the condensate water outlet pipeline.

[0011] Further, the distillation kettle is provided with a kettle pressure transmitter.

[0012] Further, the condenser is provided with a chilled water outlet temperature transmitter.

[0013] The output end of the kettle temperature transmitter is electrically connected with the control end of the steam valve, and the output end of the chilled water outlet temperature transmitter is electrically connected with the control end of the steam valve.

[0014] The output end of the kettle temperature transmitter is electrically connected with the control end of the valve on the cooling water inlet pipeline and the valve on the cooling water outlet pipeline.

[0015] Further, the solvent metering tank is provided with a vacuum pipeline and a venting pipeline.

[0016] In order to prevent solvent from being volatilized and leaked, the vacuum pipeline is arranged, and in order to prevent the solvent metering tank from exploding due to abnormal pressure, the venting pipeline is arranged.

[0017] Further, the reflux ratio controller is connected with the solvent metering tank through the extraction pipeline.

[0018] Working principle:

[0019] The steam enters the distillation kettle jacket through the steam pipeline to heat and distill the imine product containing solvent in the distillation kettle, is condensed through the condenser, the proportion of reflux and extraction is controlled through the reflux ratio controller, the reflux liquid is refluxed to the distillation kettle through the reflux pipeline, the sampling pipeline is arranged on the reflux pipeline to take sample and detect, the percentage of solvent contained in the imine product is detected, and the distillation conditions and progress are controlled through the detection data.

[0020] In the process, the distillation temperature of the distillation kettle is controlled by the kettle temperature transmitter interlocking the steam valve, when the temperature of the distillation kettle reaches the set temperature, the steam valve is closed to stop steam, when the chilled water outlet temperature transmitter monitors that the temperature of the chilled water reaches the set temperature, the steam valve is closed to stop steam. When the kettle temperature transmitter monitors that the temperature of the distillation kettle is higher than the set value, the valves on the cooling water inlet pipe and the cooling water outlet pipe are opened to cool the distillation kettle, and the temperature of the distillation kettle is comprehensively controlled from multiple directions, so that the problem that the imine product is decomposed or other side reactions occur due to poor thermal stability, too fast heating rate or too high temperature is avoided.

[0021] The beneficial effects of the utility model are as follows:

[0022] (1) The reflux ratio controller is arranged in the utility model, the liquid flow between the distillation kettle and the condenser is controlled by adjusting the reflux ratio, the proportion of reflux and extraction can be set at will, and the solvent can be evaporated completely from the imine product. The reflux ratio controller is connected with the DCS to realize automatic control.

[0023] (2) The sampling pipeline is arranged on the reflux pipeline to take sample and detect in the utility model, the percentage of solvent contained in the imine product can be detected, and the distillation conditions and progress are controlled.

[0024] (3) The temperature of the distillation kettle is comprehensively controlled from multiple directions in the utility model, and the problem that the imine product is decomposed or other side reactions occur due to poor thermal stability, too fast heating rate or too high temperature is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings described herein are used to provide further understanding of the utility model and constitute a part of the utility model. In the drawings:

[0026] Figure 1 It is a structure schematic view of the solvent efficient distillation safety device of the imine product.

[0027] In the figure: 1, distillation kettle; 101, kettle pressure transmitter; 102, kettle temperature transmitter; 103, jacket pressure transmitter; 2, condenser; 201, chilled water outlet temperature transmitter; 3, reflux ratio controller; 4, solvent metering tank; 5, steam pipeline; 6, cooling water inlet pipe; 7, cooling water return pipe; 8, condensate outlet pipe; 9, cooling water outlet pipe; 10, air pressure pipeline; 11, reflux pipeline; 12, sampling pipeline; 13, production pipeline; 14, vacuum pipeline; 15, emptying pipeline. DETAILED DESCRIPTION

[0028] The utility model can be understood in combination with the following examples.

[0029] In one embodiment, as shown in Figure 1 the solvent high-efficiency distillation safety device for imine products includes a distillation kettle 1, the top of the distillation kettle 1 is connected to a condenser 2, the condenser 2 is connected to the distillation kettle 1 and a solvent metering tank 4 through a reflux ratio controller 3, a temperature control device is arranged on the distillation kettle 1, the reflux ratio controller 3 is connected to the distillation kettle 1 through a reflux pipeline 11, and a sampling pipeline 12 is arranged on the reflux pipeline 11.

[0030] The reflux ratio controller 3 controls the liquid flow between the distillation kettle 1 and the condenser 2 by adjusting the reflux ratio, and the reflux and production ratio can be set arbitrarily, so that the solvent can be evaporated completely from the imine products. The reflux ratio controller 3 is connected to a DCS to realize automatic control.

[0031] The sampling pipeline 12 arranged on the reflux pipeline 11 is used for sampling detection, so that the percentage of solvent in the imine products can be detected, and the distillation conditions and progress can be controlled.

[0032] It can be understood that the temperature control device includes a kettle temperature transmitter 102 arranged on the distillation kettle 1, a jacket arranged outside the distillation kettle 1, a jacket pressure transmitter 103 arranged on the jacket, a steam pipeline 5, a cooling water inlet pipe 6 and a cooling water return pipe 7 connected to the jacket, an air pressure pipeline 10, a cooling water outlet pipe 9 and a condensate outlet pipe 8 connected to the bottom of the jacket, a steam valve arranged on the steam pipeline 5, and valves arranged on the cooling water inlet pipe 6, the cooling water return pipe 7, the air pressure pipeline 10, the cooling water outlet pipe 9 and the condensate outlet pipe 8.

[0033] The steam in the jacket flows out from the condensate outlet pipe 8 after condensation.

[0034] It can be understood that the distillation kettle 1 is provided with a kettle pressure transmitter 101.

[0035] It can be understood that the condenser 2 is provided with a chilled water outlet temperature transmitter 201.

[0036] The output of the reactor temperature transmitter 102 is electrically connected to the control terminal of the steam valve, and the output of the chilled water outlet temperature transmitter 201 is electrically connected to the control terminal of the steam valve.

[0037] The output of the reactor temperature transmitter 102 is electrically connected to the control terminals of the valve on the cooling water inlet pipe 6 and the valve on the cooling water outlet pipe 9.

[0038] Understandably, the solvent metering tank 4 is equipped with a vacuum line 14 and an evacuation line 15.

[0039] To prevent solvent evaporation and leakage, a vacuum line 14 is installed. At the same time, to prevent an explosion caused by abnormal pressure inside the solvent metering tank 4, an venting line 15 is installed.

[0040] Understandably, the reflux ratio controller 3 is connected to the solvent metering tank 4 via the extraction pipeline 13.

[0041] Working principle:

[0042] Steam enters the jacket of distillation vessel 1 through steam pipeline 5 to heat and distill the imine product containing solvent in distillation vessel 1. After condensation by condenser 2, the reflux ratio is controlled by reflux ratio controller 3. The refluxed liquid flows back to distillation vessel 1 through reflux pipeline 11. A sampling pipeline 12 is connected to reflux pipeline 11 for sampling and testing to determine the percentage of solvent in the imine product. The test data is used to control the distillation conditions and progress. The collected solvent enters solvent metering tank 4 through collection pipeline 13.

[0043] During this process, the distillation temperature of the distillation vessel 1 is controlled by the interlocking steam valve of the vessel temperature transmitter 102. When the temperature of the distillation vessel 1 reaches the set temperature, the steam valve closes, stopping the steam intake. When the chilled water outlet temperature transmitter 201 detects that the chilled water temperature has reached the set temperature, the steam valve closes, stopping the steam intake. When the vessel temperature transmitter 102 detects that the temperature of the distillation vessel 1 is higher than the set value, it interlocks and opens the valves on the cooling water inlet pipe 6 and the cooling water outlet pipe 9 to cool the distillation vessel 1. The temperature of the distillation vessel 1 is controlled comprehensively from multiple directions, preventing the decomposition or other side reactions caused by the poor thermal stability of imine products, excessively fast heating rates, or excessively high temperatures.

[0044] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0045] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A safe and efficient solvent distillation device for imine products, characterized in that, It includes a distillation kettle (1), a condenser (2) connected to the top of the distillation kettle (1), and the condenser (2) is connected to the distillation kettle (1) and the solvent metering tank (4) respectively through a reflux ratio controller (3). The distillation kettle (1) is equipped with a temperature control device. The reflux ratio controller (3) is connected to the distillation kettle (1) through a reflux line (11). A sampling line (12) is opened on the reflux line (11).

2. The solvent high-efficiency distillation safety device for imine products according to claim 1, characterized in that, The temperature control device includes a vessel temperature transmitter (102) installed on the distillation vessel (1). The distillation vessel (1) is provided with a jacket, and a jacket pressure transmitter (103) is provided on the jacket. The jacket is connected to a steam pipeline (5), a cooling water inlet pipe (6), and a cooling water return pipe (7). The bottom of the jacket is connected to an air compressor pipeline (10), a cooling water outlet pipe (9), and a condensate outlet pipe (8). A steam valve is provided on the steam pipeline (5). Valves are provided on the cooling water inlet pipe (6), the cooling water return pipe (7), the air compressor pipeline (10), the cooling water outlet pipe (9), and the condensate outlet pipe (8).

3. The solvent high-efficiency distillation safety device for imine products according to claim 1, characterized in that, The distillation vessel (1) is equipped with a vessel pressure transmitter (101).

4. The solvent high-efficiency distillation safety device for imine products according to claim 1, characterized in that, The condenser (2) is equipped with a chilled water outlet temperature transmitter (201).

5. The high-efficiency distillation safety device for imine products according to claim 1, characterized in that, The solvent metering tank (4) is equipped with a vacuum line (14) and an vent line (15).

6. The solvent high-efficiency distillation safety device for imine products according to claim 1, characterized in that, The reflux ratio controller (3) is connected to the solvent metering tank (4) via the extraction pipeline (13).

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