Vacuum system for distilling fatty acid

Abstract

According to the vacuum system for distilling fatty acid, the first steam injection vacuum pump, the second steam injection vacuum pump and the third steam injection vacuum pump are utilized to generate negative pressure in the distillation tower, so that the boiling point of materials is reduced; meanwhile, one part of the low-molecular-weight material is sucked out from the top of the distillation tower and then enters a first steam injection vacuum pump to be mixed with steam, and finally mixed steam of the distilled material and the steam is injected out from an end outlet of a third steam injection vacuum pump; condensate water in a shell pass in the condenser condenses steam in a tube pass; heating steam in a shell pass in the condenser heats and removes materials in a tube pass; washing water in the hot well is used for washing the tube pass; under the combined action of heating of the heating steam and spraying of the washing water, the cleaning effect and efficiency of the tube pass are improved, the cleaning effect and efficiency of materials in the tube pass are improved, and the tube pass is prevented from being blocked by the materials.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum systems for distilling fatty acids, in particular to a vacuum system for distilling fatty acids. Background Art

[0002] After hydrolysis, the mixed acid is distilled to produce fatty acids of varying molecular weights (carbon chain lengths). Low-molecular-weight fatty acids are discharged from the top of the distillation column, medium-molecular-weight fatty acids from the middle, and high-molecular-weight fatty acids from the bottom. Vacuum distillation is typically performed using a vacuum system. Without a vacuum system to lower the boiling point, boiling at atmospheric pressure can lead to coking. Utility Model Content

[0003] The purpose of the utility model is to provide a vacuum system for distilling fatty acids.

[0004] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0005] A vacuum system for distilling fatty acids, comprising a medium-pressure steam storage container, a first steam jet vacuum pump, a second steam jet vacuum pump, a third steam jet vacuum pump, a condenser, a hot well, a washing water circulation pump, a condensed water storage tank, and a heating steam storage container;

[0006] The outlet of the medium-pressure steam storage container is connected to the end inlet of the first steam jet vacuum pump through a pipeline. The side inlet of the first steam jet vacuum pump is used to communicate with the distilled material outlet of the distillation column. The end outlet of the first steam jet vacuum pump is connected to the side inlet of the second steam jet vacuum pump through a pipeline.

[0007] The outlet of the medium-pressure steam storage container is connected to the end inlet of the second steam jet vacuum pump through a pipeline, and the end outlet of the second steam jet vacuum pump is connected to the pipe-side inlet of the upper part of the condenser through a pipeline;

[0008] The condenser is a shell and tube heat exchanger structure, and the tube outlet at the lower part of the condenser is connected to the side inlet of the third steam jet vacuum pump through a pipeline;

[0009] The outlet of the medium-pressure steam storage container is connected to the end inlet of the third steam jet vacuum pump through a pipeline, and the end outlet of the third steam jet vacuum pump is used to eject the mixed steam of the evaporated material and steam;

[0010] The water outlet of the condensed water storage tank is connected to the shell side inlet of the lower part of the condenser through a pipeline, and the shell side outlet of the upper part of the condenser is used to discharge the condensed water heated by heat exchange into the shell side;

[0011] The outlet of the heating steam storage container is connected to the shell-side inlet of the lower part of the condenser through a pipeline. The shell-side outlet of the upper part of the condenser is used to discharge the heating steam after heat exchange and cooling into the atmosphere. The shell-side inlet of the lower part of the condenser is connected to the inlet of the hot well through a pipeline to discharge the condensed water remaining in the shell into the hot well.

[0012] The outlet of the bottom head of the tube side of the condenser is connected to the inlet of the hot well through a pipeline, the washing water outlet at the bottom of the hot well is connected to the inlet of the washing water circulation pump through a pipeline, and the outlet of the washing water circulation pump is connected to the inlet of the top head of the tube side of the condenser through a pipeline, so as to circulate and spray washing water to wash the tube side. A washing water overflow pipe is provided on the upper part of the hot well.

[0013] Preferably, a condensate inlet valve is provided on the condensate inlet pipe;

[0014] A condensate outlet valve is provided on the condensate outlet pipe;

[0015] A residual condensate drain valve is provided on the residual condensate drain pipe;

[0016] A heating steam inlet valve is provided on the heating steam inlet pipeline;

[0017] A heating steam exhaust valve is provided on the heating steam exhaust pipe.

[0018] This application has achieved the following beneficial technical effects:

[0019] The vacuum system provided in the present application successfully creates a negative pressure in the distillation tower, thereby lowering the boiling point of the material. At the same time, a portion of the low molecular weight material is sucked out from the top of the distillation tower and enters the first steam jet vacuum pump to mix with the steam. Finally, the mixture of the distilled material and the steam is ejected from the end outlet of the third steam jet vacuum pump.

[0020] In this application, in the vacuum system, the medium-pressure steam (water vapor) is introduced into the tube side of the condenser by the action of the steam jet vacuum pump, and then the steam in the tube side is cooled by the condensed water in the shell side, so that the steam is condensed into water and discharged into the hot well through the pipe at the bottom of the condenser;

[0021] However, as the production unit continues to operate, part of the evaporated material enters the condenser tube along with the steam, which causes some materials with higher freezing points to cool and solidify in the condenser tube, thereby causing the condenser tube to be blocked by the evaporated material.

[0022] In order to ensure the smoothness of the production process, the condenser tubes are cleaned regularly with washing water;

[0023] During the steam cleaning process, the condensate inlet valve must be closed and heated steam (water vapor) must be used instead to heat the solid materials in the pipe, melting them into liquid form. The liquid materials are then discharged into the hot well through the drainage pipe at the bottom of the condenser. The excess washing water in the hot well is discharged through the washing water overflow pipe to ensure stable operation of the system.

[0024] The operation steps are as follows: (1) Before heating the condenser tube, first ensure that the condensate inlet valve on the condensate inlet pipe and the condensate outlet valve on the condensate outlet pipe are closed to ensure the safety of the operation;

[0025] (2) Open the residual condensate drain valve and simultaneously open the heating steam drain valve to effectively drain the residual condensate in the shell side. After the residual condensate is drained, close the residual condensate drain valve;

[0026] (3) After ensuring that the residual condensate is drained, open the heating steam inlet valve to quickly heat the condenser tubes;

[0027] The optimized heating process of the condenser tubes, where the heating steam and the spraying washing water work together, improves the cleaning effect and efficiency of the tubes, improves the removal effect and efficiency of materials in the tubes, prevents the tubes from being blocked by materials, significantly improves the heating efficiency, effectively shortens the heating time, and significantly reduces energy consumption, thus achieving the goal of energy-saving and efficient operation;

[0028] It has the function of efficiently heating the condenser tubes, reducing energy consumption and significantly improving operating efficiency, thus effectively saving time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the working principle of a vacuum system for distilling fatty acids provided in an embodiment of the present utility model;

[0030] In the figure: 101 is a first steam jet vacuum pump, 102 is a second steam jet vacuum pump, 103 is a third steam jet vacuum pump;

[0031] 2 condenser, 201 condensate inlet valve, 202 condensate outlet valve, 203 residual condensate drain valve;

[0032] 3 hot well, 301 washing water circulation pump, 302 washing water overflow pipe;

[0033] 401 is the heating steam inlet valve, and 402 is the heating steam exhaust valve. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "axial", "radial", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0036] Reference Figure 1 In the figure: the first steam jet vacuum pump 101, the second steam jet vacuum pump 102, the third steam jet vacuum pump 103; the condenser 2, the condensate inlet valve 201, the condensate outlet valve 202, the residual condensate drain valve 203; the hot well 3, the washing water circulation pump 301, the washing water overflow pipe 302; the heating steam inlet valve 401, the heating steam exhaust valve 402.

[0037] The present application provides a vacuum system for distilling fatty acids, comprising a medium-pressure steam storage container, a first steam jet vacuum pump 101, a second steam jet vacuum pump 102, a third steam jet vacuum pump 103, a condenser 2, a hot well 3, a washing water circulation pump 301, a condensed water storage tank, and a heating steam storage container;

[0038] The outlet of the medium-pressure steam storage container is connected to the end inlet of the first steam jet vacuum pump 101 through a pipeline. The side inlet of the first steam jet vacuum pump 101 is used to communicate with the outlet of the distilled material of the distillation column. The end outlet of the first steam jet vacuum pump 101 is connected to the side inlet of the second steam jet vacuum pump 102 through a pipeline.

[0039] The outlet of the medium-pressure steam storage container is connected to the end inlet of the second steam jet vacuum pump 102 through a pipeline, and the end outlet of the second steam jet vacuum pump 102 is connected to the pipe-side inlet of the upper part of the condenser 2 through a pipeline;

[0040] The condenser 2 is a shell and tube heat exchanger structure, and the tube outlet at the lower portion of the condenser 2 is connected to the side inlet of the third steam jet vacuum pump 103 through a pipeline;

[0041] The outlet of the medium-pressure steam storage container is connected to the end inlet of the third steam jet vacuum pump 103 through a pipeline. The end outlet of the third steam jet vacuum pump 103 is used to eject the mixed steam of the evaporated material and steam (entering the next process for subsequent treatment);

[0042] The water outlet of the condensed water storage tank is connected to the shell side inlet of the lower part of the condenser 2 through a pipeline, and the shell side outlet of the upper part of the condenser 2 is used to discharge the condensed water heated by heat exchange out of the shell side;

[0043] The outlet of the heating steam storage container is connected to the shell-side inlet of the lower part of the condenser 2 through a pipeline. The shell-side outlet of the upper part of the condenser 2 is used to discharge the heating steam after heat exchange and cooling into the atmosphere. The shell-side inlet of the lower part of the condenser 2 is connected to the inlet of the hot well 3 through a pipeline to discharge the condensed water remaining in the shell into the hot well 3.

[0044] The outlet of the bottom head of the tube side of the condenser 2 is connected to the inlet of the hot well 3 through a pipeline, and the washing water outlet at the bottom of the hot well 3 is connected to the inlet of the washing water circulation pump 301 through a pipeline. The outlet of the washing water circulation pump 301 is connected to the inlet of the top head of the tube side of the condenser 2 through a pipeline, so as to circulate and spray washing water to wash the tube side. A washing water overflow pipe 302 is provided on the upper part of the hot well 3.

[0045] In one embodiment of the present application, a condensate inlet valve 201 is provided on the condensate inlet pipe;

[0046] A condensate outlet valve 202 is provided on the condensate outlet pipe;

[0047] A residual condensate drain valve 203 is provided on the residual condensate drain pipe;

[0048] A heating steam inlet valve 401 is provided on the heating steam inlet pipe;

[0049] A heating steam exhaust valve 402 is provided on the heating steam exhaust pipe.

[0050] In this application, a water vapor jet vacuum pump is a type of jet vacuum pump that uses water vapor as its working medium and can exhaust directly into the atmosphere. This pump has fast startup, a small footprint, a wide operating pressure range, and a large suction capacity. It can remove dust, corrosive, and flammable and explosive vapors. A jet vacuum pump, also known as a jet vacuum pump, is a device that uses a high-speed jet through a nozzle to remove vapor from a container to create a vacuum. Jet vacuum pumps are suitable for high-temperature, high-pressure, and high-vacuum applications, such as vacuum evaporation, vacuum drying, vacuum refrigeration, and vacuum distillation. They are also suitable for special environments with strong radiation.

[0051] The methods and devices not described in detail in this utility model are all prior art and will not be described in detail.

[0052] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A vacuum system for distilling fatty acids, characterized in that It includes a medium-pressure steam storage container, a first steam jet vacuum pump, a second steam jet vacuum pump, a third steam jet vacuum pump, a condenser, a hot well, a washing water circulation pump, a condensate storage tank, and a heating steam storage container; The outlet of the medium-pressure steam storage container is connected to the end inlet of the first steam jet vacuum pump through a pipeline. The side inlet of the first steam jet vacuum pump is used to communicate with the distilled material outlet of the distillation column. The end outlet of the first steam jet vacuum pump is connected to the side inlet of the second steam jet vacuum pump through a pipeline. The outlet of the medium-pressure steam storage container is connected to the end inlet of the second steam jet vacuum pump through a pipeline, and the end outlet of the second steam jet vacuum pump is connected to the pipe-side inlet of the upper part of the condenser through a pipeline; The condenser is a shell and tube heat exchanger structure, and the tube outlet at the lower part of the condenser is connected to the side inlet of the third steam jet vacuum pump through a pipeline; The outlet of the medium-pressure steam storage container is connected to the end inlet of the third steam jet vacuum pump through a pipeline, and the end outlet of the third steam jet vacuum pump is used to eject the mixed steam of the evaporated material and steam; The water outlet of the condensed water storage tank is connected to the shell side inlet of the lower part of the condenser through a pipeline, and the shell side outlet of the upper part of the condenser is used to discharge the condensed water heated by heat exchange into the shell side; The outlet of the heating steam storage container is connected to the shell-side inlet of the lower part of the condenser through a pipeline. The shell-side outlet of the upper part of the condenser is used to discharge the heating steam after heat exchange and cooling into the atmosphere. The shell-side inlet of the lower part of the condenser is connected to the inlet of the hot well through a pipeline to discharge the condensed water remaining in the shell into the hot well. The outlet of the bottom head of the tube side of the condenser is connected to the inlet of the hot well through a pipeline, the washing water outlet at the bottom of the hot well is connected to the inlet of the washing water circulation pump through a pipeline, and the outlet of the washing water circulation pump is connected to the inlet of the top head of the tube side of the condenser through a pipeline, so as to circulate and spray washing water to wash the tube side. A washing water overflow pipe is provided on the upper part of the hot well.

2. A vacuum system for distilling fatty acids according to claim 1, characterized in that, A condensate inlet valve is provided on the condensate inlet pipe; A condensate outlet valve is provided on the condensate outlet pipe; A residual condensate drain valve is provided on the residual condensate drain pipe; A heating steam inlet valve is provided on the heating steam inlet pipeline; A heating steam exhaust valve is provided on the heating steam exhaust pipe.

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