Distillation device for isononanoyl chloride production

Abstract

The utility model provides a distillation device for isononanoyl chloride production. The distillation device comprises a kettle body, a condenser connected with a steam exhaust port of the kettle body, a liquid collection tank connected with a condensate outlet of the condenser, a safety tank connected with the liquid collection tank, a tail gas absorption tower connected with the safety tank, a vacuum pump for pumping and exhausting and a preheating pipe connected with a feed port of the kettle body, the safety tank is provided with an emptying port, and the emptying port is connected with a protective gas supply device through a pipeline provided with a valve; the preheating pipe is connected with a feed liquid supply device, a spiral pipe is wound on the preheating pipe, and the inlet end of the spiral pipe is connected with a cold medium outlet of the condenser. The distillation device for isononanoyl chloride production is reasonable in structural design, high in heat energy utilization rate, energy-saving, environment-friendly, safe and stable.

Description

Technical Field

[0001] The utility model belongs to the field of isononanoyl chloride production equipment, and particularly relates to a distillation device for isononanoyl chloride production. Background Art

[0002] Isononanoyl chloride is an aliphatic acyl chloride with the chemical formula C9H 17 ClO, CAS number 36727-29-4, and English name Isononanoyl Chloride. It is used as an intermediate for organic synthetic chemicals in industry, for synthesizing organic compounds such as esters and acyl chloride derivatives, and can also be used as an adhesive and modifier in inks or coatings, or as a synthetic surfactant and functional polymer.

[0003] In the preparation process of isononanoyl chloride, after the reaction is completed, the reaction mixture needs to be subjected to vacuum distillation to obtain the required isononanoyl chloride product. When the existing vacuum distillation equipment condenses the steam distilled from the kettle body, the heat exchange medium after absorbing heat is usually directly discharged, and a large amount of heat energy contained in it after absorbing heat is not fully utilized, resulting in heat waste. In addition, due to the instability of isononanoyl chloride and its sensitivity to water, the structure of the existing vacuum distillation equipment is unreasonable and lacks a protection structure. After the distillation is completed, air is easily introduced into the system, affecting the product quality. Summary of the Utility Model

[0004] In view of this, to solve the above technical problems, the utility model provides a distillation device for isononanoyl chloride production with reasonable structural design, high heat energy utilization rate, energy conservation, environmental protection, safety and stability.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A distillation device for isononanoyl chloride production, comprising:

[0007] A kettle body, with a steam discharge port and a feed port at the top, a liquid discharge port at the bottom, and a heating jacket on the outside;

[0008] A condenser, connected to the steam discharge port to condense the gas flowing out of the kettle body;

[0009] A preheating tube, with both ends respectively connected to the feed port and a liquid supply device, and a preheating spiral tube wound around the preheating tube, with the inlet end of the preheating spiral tube connected to the cold medium outlet of the condenser;

[0010] A liquid collection tank, connected to the condensate outlet of the condenser for collecting condensate;

[0011] A safety tank, which is connected to the gas outlet of the liquid collecting tank. A venting port is provided on the safety tank, and the venting port is connected to a protective gas supply device through a pipeline provided with a valve;

[0012] A tail gas absorption tower, which is connected to the gas outlet of the safety tank and is used for post-treatment of the tail gas;

[0013] A vacuum pump, which is used for evacuating and exhausting the device.

[0014] The vacuum pump evacuates the entire device. The reacted liquid material is heated and distilled in the kettle body. The steam enters the condenser and exchanges heat with the cold medium. After that, the condensate and the non-condensable gas enter the liquid collecting tank. The condensate is collected by the liquid collecting tank, and the non-condensable gas enters the safety tank. After obtaining buffering, it enters the tail gas absorption tower and is discharged after being treated by the tail gas absorption tower; The cold medium after heat exchange in the condenser absorbs a large amount of heat and flows into the preheating spiral tube to preheat the reacted liquid material entering the preheating tube, realizing the recovery and reuse of the steam heat, improving the thermal energy utilization rate. The reacted liquid material after preheating enters the kettle body and is further heated by the heating jacket to generate steam, which enters the condenser for condensation; The safety tank plays a role of safety buffering. A venting port connected to the protective gas supply device is provided on it. After the distillation is completed, the system can be protected by opening the venting port and introducing a protective gas. The protective gas is generally selected as nitrogen; Since the non-condensable tail gas contains harmful substances, a tail gas absorption tower is provided to treat the tail gas, which is more environmentally friendly.

[0015] Furthermore, a stirring shaft and stirring paddles provided on the stirring shaft are arranged in the kettle body; The upper end of the stirring shaft is connected to a stirring motor located at the top outside the kettle body.

[0016] Stirring is provided in the kettle body to avoid the occurrence of violent boiling and make the temperature of the liquid material uniform quickly everywhere.

[0017] Furthermore, a temperature monitor, a pressure gauge, and a gas extraction and inflation port are provided on the kettle body; A gas extraction branch pipe and an inflation branch pipe with valves are connected to the gas extraction and inflation port. The gas extraction branch pipe is connected to the vacuum pump, and the inflation branch pipe is connected to the protective gas supply device.

[0018] The gas extraction and inflation port is provided on the kettle body as a standby treatment device for vacuum evacuation and venting. Vacuum evacuation can also be carried out through the gas extraction branch pipe before distillation, and a protective gas can be filled through the inflation branch pipe after the distillation is completed.

[0019] Furthermore, the condenser is inclined. The end connected to the steam outlet is the higher side, and the end connected to the liquid collecting tank is the lower side, which is conducive to the discharge of the condensate; The cold medium outlet of the condenser is located on the higher side, that is, the flow direction of the cooling medium is opposite to that of the steam.

[0020] Furthermore, a pressure gauge is provided on the liquid collection tank, and a discharge port is provided at the bottom.

[0021] Furthermore, the tower body of the tail gas absorption tower is composed of a plurality of tower sections stacked in sequence from bottom to top. Its air inlet is located at the bottom, and its air outlet is located at the top; the air outlet of the tail gas absorption tower is connected to the vacuum pump through a pipeline provided with a valve.

[0022] Setting the tail gas absorption tower as a structure where multiple tower sections are stacked vertically can reduce the floor area of the tail gas treatment device and make it more centralized.

[0023] Furthermore, the tower body of the tail gas absorption tower is successively a drying zone, an acid removal zone, and an organic gas removal zone from bottom to top.

[0024] Compared with the prior art, the distillation device for isononanoyl chloride production of the present utility model has the following advantages:

[0025] The distillation device for isononanoyl chloride production of the present utility model has a reasonable structural design and is provided with a protective structure, which can protect the system and prevent moisture in the air from entering the system and affecting the product stability; at the same time, a preheating pipe and a preheating spiral pipe are provided, and the cold medium that has absorbed a large amount of heat after heat exchange is introduced into the preheating spiral pipe to preheat the liquid material, realizing the recovery and reuse of the heat of the steam, improving the thermal energy utilization rate, reducing heat waste, and being more energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0027] Figure 1 It is a schematic structural diagram of the distillation device for isononanoyl chloride production according to the embodiment of the present utility model.

[0028] Description of the reference numerals:

[0029] 1 - kettle body, 2 - condenser, 3 - preheating pipe, 4 - liquid collection tank, 5 - safety tank, 6 - tail gas absorption tower, 7 - vacuum pump, 8 - stirring shaft, 9 - stirring paddle, 10 - stirring motor, 11 - exhaust port, 12 - feed port, 13 - air extraction and inflation port, 14 - air extraction branch pipe, 15 - inflation branch pipe, 16 - liquid discharge port, 17 - heating jacket, 18 - preheating spiral pipe, 19 - discharge port, 20 - vent port, 21 - drying zone, 22 - acid removal zone, 23 - organic gas removal zone. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0032] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0033] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0034] As Figure 1 shown, a distillation device for the production of isononanoyl chloride includes a kettle body 1, a condenser 2, a preheating pipe 3, a liquid collection tank 4, a safety tank 5, a tail gas absorption tower 6, and a vacuum pump 7;

[0035] Among them, a stirring shaft 8 and stirring paddles 9 provided on the stirring shaft 8 are arranged inside the kettle body 1, and the upper end of the stirring shaft 8 is connected to a stirring motor 10 located at the top outside the kettle body 1; a steam exhaust port 11, a feed port 12, a temperature monitor, a pressure gauge, and an air extraction and inflation port 13 are provided at the top of the kettle body 1. A suction branch pipe 14 with a valve and an inflation branch pipe 15 are connected to the air extraction and inflation port 13. The suction branch pipe 14 is connected to the vacuum pump 7 (not shown in the figure), and the inflation branch pipe 15 is connected to an external protective gas supply device; a liquid discharge port 16 is provided at the bottom of the kettle body 1; a heating jacket 17 is provided outside the kettle body 1;

[0036] The condenser 2 is inclined, the inlet end of the higher side is connected to the steam exhaust port 11, and the condensate outlet of the lower side is connected to the inlet end of the liquid collection tank 4; the cold medium outlet of the condenser 2 is located on the higher side, and the cold medium inlet is located on the lower side. The cold medium inlet is connected to a cold medium supply device;

[0037] Both ends of the preheating pipe 3 are respectively connected to the feed inlet 12 and the liquid supply device. The preheating spiral pipe 18 is wound around the preheating pipe 3. The inlet end of the preheating spiral pipe 18 is connected to the cold medium outlet of the condenser 2. After the outlet end of the preheating spiral pipe 18 is externally connected to the cooling device, the cold medium is further cooled and then circulated back to the cold medium supply device;

[0038] The liquid collecting tank 4 is provided with a pressure gauge and a discharge port 19 at the bottom; the gas outlet of the liquid collecting tank 4 is connected to the safety tank 5;

[0039] The safety tank 5 is provided with a vent port 20, and the vent port 20 is connected to the external protective gas supply device through a pipeline provided with a valve; the gas outlet of the safety tank 5 is connected to the tail gas absorption tower 6;

[0040] The tower body of the tail gas absorption tower 6 is composed of a plurality of tower sections stacked in sequence from bottom to top, namely a drying area 21, an acid removal area 22, and an organic gas removal area 23. Its inlet is located at the bottom and the outlet is located at the top; the outlet of the tail gas absorption tower 6 is connected to the vacuum pump 7 through a pipeline provided with a valve.

[0041] The working process of the distillation device for isononanoyl chloride production described in the present utility model is as follows:

[0042] The vacuum pump 7 evacuates the entire device, and the heating jacket 17 heats the liquid in the kettle body 1. The generated steam enters the condenser 2, exchanges heat with the cold medium, and then the condensate and non-condensable gas enter the liquid collecting tank 4. The condensate is collected by the liquid collecting tank 4, and the non-condensable gas enters the safety tank 5, and after being buffered, enters the tail gas absorption tower 6, and is discharged after passing through the drying area 21, the acid removal area 22, and the organic gas removal area 23 in sequence from bottom to top in the tail gas absorption tower 6; the cold medium after heat exchange in the condenser 2 absorbs a large amount of heat and flows into the preheating spiral pipe 18 to preheat the liquid entering the preheating pipe 3. After being preheated, the liquid enters the kettle body 1 and is further heated by the heating jacket 17 to generate steam, which enters the condenser 2 for condensation.

[0043] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A distillation device for the production of isononanoyl chloride, characterized in that, Comprising: A kettle body, with a steam exhaust port and a feed port at the top, a liquid discharge port at the bottom, and a heating jacket on the outside. A condenser, connected to the steam exhaust port, for condensing the gas flowing out of the kettle body. A preheating pipe, with both ends respectively connected to the feed port and a liquid supply device. A preheating spiral pipe is wound around the preheating pipe, and the inlet end of the preheating spiral pipe is connected to the cold medium outlet of the condenser. A liquid collection tank, connected to the condensate outlet of the condenser, for collecting condensate. A safety tank, connected to the gas outlet of the liquid collection tank. A vent port is provided on the safety tank, and the vent port is connected to a protective gas supply device through a pipe provided with a valve. A tail gas absorption tower, connected to the gas outlet of the safety tank, for post-treatment of the tail gas. A vacuum pump, for evacuating and filling the device.

2. The distillation device for isononanoyl chloride production according to claim 1, characterized in that: A stirring shaft and stirring paddles provided on the stirring shaft are arranged inside the kettle body; the upper end of the stirring shaft is connected to a stirring motor located at the top outside the kettle body.

3. The distillation device for isononanoyl chloride production according to claim 2, wherein: A temperature monitor, a pressure gauge, and a gas extraction and inflation port are provided on the kettle body; a gas extraction branch pipe and an inflation branch pipe with valves are connected to the gas extraction and inflation port. The gas extraction branch pipe is connected to the vacuum pump, and the inflation branch pipe is connected to a protective gas supply device.

4. The distillation device for isononanoyl chloride production according to claim 1, wherein: The condenser is inclined, with the end connected to the steam exhaust port being the higher side and the end connected to the liquid collection tank being the lower side; the cold medium outlet of the condenser is located on the higher side.

5. The distillation device for isononanoyl chloride production according to claim 1, wherein: A pressure gauge is provided on the liquid collection tank, and a discharge port is provided at the bottom.

6. The distillation device for isononanoyl chloride production according to claim 1, characterized in that: The tower body of the tail gas absorption tower is composed of multiple tower sections stacked in sequence from bottom to top. Its inlet is located at the bottom and its outlet is located at the top; the outlet of the tail gas absorption tower is connected to the vacuum pump through a pipe provided with a valve.

7. The distillation device for isononanoyl chloride production according to claim 6, characterized in that: The tower body of the tail gas absorption tower is successively a drying zone, an acid removal zone, and an organic gas removal zone from bottom to top.

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