Conduction oil cooling device in production of 2, 4-D butyric acid

Abstract

The utility model belongs to the technical field of chemical production, and discloses a heat-conducting oil cooling device in 2, 4-butyric acid production, which comprises an esterification kettle, a cold oil receiving tank is arranged on one side of a kettle body of the esterification kettle, a heat-conducting oil outlet is arranged at the bottom of the cold oil receiving tank, and the heat-conducting oil outlet is communicated with an oil inlet of a condenser through a pipeline and a valve. An oil outlet of the condenser is communicated with a medium inlet of the esterification kettle jacket through a pipeline, a valve and a circulating pump; a tee joint is arranged at a medium outlet of the esterification kettle jacket and is respectively communicated with a heat-conducting oil inlet of the cold oil receiving tank and a public heat-conducting oil return pipeline through a pipeline and a valve; and the top of the cold oil receiving tank is also provided with an emptying port. The cooling device is simple in technological process and good in cooling effect, and the safety coefficient in the production process is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical production, and specifically relates to a heat transfer oil cooling device in the production of 2,4-D butyric acid. Background Art

[0002] 2,4-D butyric acid is a phenoxycarboxylic acid hormone-type selective herbicide, which is mainly used to control annual broadleaf weeds and sedge weeds in rice fields. The mechanism of action is to interfere with the hormone balance of plants, causing the affected plants to twist, swell, develop deformities, etc., and eventually lead to death. In the production process of 2,4-D butyric acid technical, the esterification reaction in the esterification kettle must be carried out at high temperature, but the temperature control range is relatively small, and it is easy to overheat. Overheating has a great impact on the reaction, not only affecting the quality and output of the product, but also may cause safety accidents. Therefore, when the reactor is about to overheat, the esterification kettle needs to be quickly cooled to the temperature range required by the reaction. However, the existing reactor jacket medium is heat transfer oil, and there is no cooling system, which results in the esterification kettle process being unable to quickly cool down when overheating, which has a serious impact on production safety and product quality and output. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a heat transfer oil cooling device for 2,4-D butyric acid production, which overcomes the defects in the prior art, can use the added cooling device to perform emergency cooling of the esterification kettle, and can recycle the heat transfer oil, reduce safety risks, and indirectly improve the output and quality of the product.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A heat transfer oil cooling device for 2,4-D butyric acid production comprises an esterification kettle, a cooling oil receiving tank is arranged on one side of the kettle body of the esterification kettle, a heat transfer oil outlet is arranged at the bottom of the cooling oil receiving tank, the heat transfer oil outlet is connected to the oil inlet of a condenser through a pipeline and a valve, and the oil outlet of the condenser is connected to the medium inlet of the esterification kettle jacket through a pipeline, a valve and a circulation pump; a tee is arranged at the medium outlet of the esterification kettle jacket, and the tee is respectively connected to the heat transfer oil inlet of the cooling oil receiving tank and a public heat transfer oil return line through a pipeline and a valve; and a vent is arranged at the top of the cooling oil receiving tank.

[0006] Preferably, a magnetic flap level gauge is provided on one side of the cooling oil receiving tank body to monitor the liquid level of the heat transfer oil in the cooling oil receiving tank.

[0007] Preferably, the cooling oil receiving tank is provided with an integrated temperature transmitter, the feeding valve of the cooling oil receiving tank is a cut-off valve, and the integrated temperature transmitter, the cut-off valve and the circulating pump are remotely started and automatically interlocked to realize the self-circulation cooling of the heat transfer oil.

[0008] Preferably, both ends of the condenser are connected to a circulating water inlet pipe and a circulating water outlet pipe through valves respectively.

[0009] Preferably, the condenser is a U-tube condenser, and a plurality of baffles are arranged on the shell side of the condenser. The plurality of baffles are arranged to achieve the effect of fully cooling the heat transfer oil.

[0010] Preferably, the medium inlet of the esterification kettle jacket is also connected to a public heat transfer oil inlet pipeline through a pipeline and a valve.

[0011] Furthermore, the valve connecting the condenser to the medium inlet pipe of the esterification kettle jacket, the valve connecting the common heat transfer oil inlet pipe to the medium inlet pipe of the esterification kettle jacket, and the valve connecting the medium outlet of the esterification kettle jacket to the heat transfer oil inlet pipe of the cooling oil receiving tank are all cut-off valves; the integrated temperature transmitter, cut-off valve and circulating pump are remotely started and automatically interlocked to realize emergency cooling of the esterification kettle.

[0012] Preferably, the vent is connected to a vent pipe.

[0013] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0014] The utility model circulates and cools, stores and recycles the heat transfer oil through the added cooling oil receiving tank, condenser and circulating pump, thereby ensuring that the esterification kettle can be quickly cooled when over-temperature occurs, greatly reducing the possibility of safety accidents. Because the reaction temperature in the esterification kettle can be well controlled within a suitable range, the smooth progress of the reaction is also guaranteed, thereby ensuring the output and quality of the product.

[0015] In short, the utility model has a simple process flow, good cooling effect, and effectively improves the safety factor in the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0017] In the figure, 1. cooling oil receiving tank; 2. magnetic flap level gauge; 3. thermal oil outlet; 4. condenser; 5. circulating pump; 6. public thermal oil inlet pipeline; 7. public thermal oil return pipeline; 8. venting pipeline; 9. thermal oil circulating pump; 9. circulating water inlet pipe; 10. circulating water outlet pipe. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Embodiment 1:

[0020] like Figure 1As shown, a heat transfer oil cooling device for 2,4-D butyric acid production comprises a cooling oil receiving tank 1, a magnetic flap level gauge 2 is provided on one side of the tank body of the cooling oil receiving tank 1, a heat transfer oil outlet 3 is provided at the bottom of the cooling oil receiving tank 1, the heat transfer oil outlet 3 is connected to the oil inlet of the condenser 4 through a pipeline 11 and a valve 12, the oil outlet of the condenser 4 is connected to the medium inlet 13 of the esterification kettle jacket through a pipeline, a valve and a circulation pump 5, and the medium inlet of the esterification kettle jacket is also connected to a public heat transfer oil inlet pipeline 6 through a pipeline and a valve; a tee is provided at the medium outlet 14 of the esterification kettle jacket, and the tee is also connected to the heat transfer oil inlet 15 of the cooling oil receiving tank and the public heat transfer oil return pipeline 7 through a pipeline and a valve; a vent 8 is also provided at the top of the cooling oil receiving tank, and the vent is connected to the vent pipeline 8.

[0021] Both ends of the condenser 4 are connected to a circulating water inlet pipe 9 and a circulating water outlet pipe 10 through valves.

[0022] In actual production: when the integrated temperature transmitter installed in the esterification kettle detects that the temperature of the material in the esterification kettle is higher than the set upper limit of the reaction temperature, it means that the temperature needs to be lowered as soon as possible. Through the interlocking control of the circulating pump 5 and the related shut-off valves installed in the esterification kettle and the cooling oil system, the shut-off valves installed on the public heat transfer oil inlet pipeline 6 and the shut-off valves installed on the public heat transfer oil return pipeline 7 are closed, and the shut-off valve at the medium inlet of the jacket of the esterification kettle from the circulating pump 5 and the valve at the heat transfer oil inlet of the cooling oil receiving tank are opened; the circulating pump 5 is started, and the heat transfer oil in the cooling oil receiving tank 1 is input into the jacket of the esterification kettle through the pipeline, and the hot oil transferred from the jacket of the esterification kettle is circulated and cooled through the condenser 4. When the temperature drops to the range set by the reaction temperature, the circulating pump 5 is closed, and the original cooling method of using the public heat transfer oil inlet pipeline 6 to supply the public heat transfer oil to the jacket of the esterification kettle, and then the heat transfer oil is returned to the jacket of the esterification kettle in other workshops through the public heat transfer oil return pipeline 7 for cooling.

[0023] It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A heat transfer oil cooling device for 2,4-D butyric acid production, characterized in that: The invention comprises an esterification kettle, wherein a cooling oil receiving tank is arranged on one side of the kettle body of the esterification kettle, a heat transfer oil outlet is arranged at the bottom of the cooling oil receiving tank, the heat transfer oil outlet is connected to the oil inlet of the condenser through a pipeline and a valve, and the oil outlet of the condenser is connected to the medium inlet of the jacket of the esterification kettle through a pipeline, a valve and a circulation pump; a tee is arranged at the medium outlet of the jacket of the esterification kettle, and the tee is respectively connected to the heat transfer oil inlet of the cooling oil receiving tank and a public heat transfer oil return line through a pipeline and a valve; and a vent is also arranged at the top of the cooling oil receiving tank.

2. The heat transfer oil cooling device for 2,4-D butyric acid production according to claim 1, characterized in that: A magnetic flap level gauge is provided on one side of the cooling oil receiving tank body.

3. The heat transfer oil cooling device for 2,4-D butyric acid production according to claim 1, characterized in that: The cooling oil receiving tank body is provided with an integrated temperature transmitter, the feeding valve of the cooling oil receiving tank is a cut-off valve, and the integrated temperature transmitter, the cut-off valve and the circulating pump are remotely started and automatically interlocked.

4. The heat transfer oil cooling device for 2,4-D butyric acid production according to claim 1, characterized in that: The condenser is a U-tube condenser, and a plurality of baffles are arranged on the shell side of the condenser.

5. The heat transfer oil cooling device for 2,4-D butyric acid production according to claim 1, characterized in that: The medium inlet of the esterification kettle jacket is also connected to the public heat transfer oil inlet pipeline through a pipeline and a valve.

6. The heat transfer oil cooling device for 2,4-D butyric acid production according to claim 5, characterized in that: The valve connected from the condenser to the medium inlet pipe of the esterification kettle jacket, the valve connected from the common heat transfer oil inlet line to the medium inlet pipe of the esterification kettle jacket, and the valve connected from the medium outlet of the esterification kettle jacket to the heat transfer oil inlet pipe of the cooling oil receiving tank are all cut-off valves.

7. The heat transfer oil cooling device for 2,4-D butyric acid production according to claim 1, characterized in that: The vent port is connected with a vent pipeline.

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