Steam waste heat recovery device for oleic acid production

Abstract

The utility model belongs to the technical field of chemical equipment, and discloses a steam waste heat recovery device for oleic acid production, which comprises a water storage tank, a gas-liquid separation tank, a water separation bag and a rectifying tower which are communicated in sequence, a water outlet of the water storage tank is communicated with a water inlet of the gas-liquid separation tank through the first centrifugal pump; the gas-liquid separation tank is provided with a liquid outlet and a gas outlet, the liquid outlet is communicated to a water inlet of the water separation bag through a second centrifugal pump, and the gas outlet is communicated to a gas inlet of the steam bag; a water outlet of the water separation bag is communicated to a water inlet of the rectifying tower, a gas outlet of the rectifying tower is communicated to a gas inlet of the gas-liquid separation tank, and a gas outlet of the gas-liquid separation tank is communicated to the steam bag; a total condenser, a raw material preheating heat exchanger and a steam generator are sequentially arranged at the top of the rectifying tower from top to bottom. The steam waste heat recycling device is simple in structure, can fully recycle steam waste heat, and plays a role in saving energy and reducing consumption.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment, and specifically relates to a steam waste heat recovery device for oleic acid production. Background Art

[0002] Oleic acid is an important natural chemical substance and one of the main fatty acids in lipid compounds in organisms. As a fine chemical product, oleic acid and its derivatives have a wide range of applications. The existing oleic acid preparation process includes crystallization filter pressing, adsorption treatment, water bath evaporation and distillation steps. During the oleic acid distillation process, heat transfer oil is required to provide a large amount of heat energy to maintain a high temperature state in order to obtain a good product and improve the yield of the product. However, the need to maintain high temperature continuously causes a large amount of energy waste. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a steam waste heat recovery device for oleic acid production, which solves the problem of serious energy waste caused by maintaining a continuous high temperature state in the existing oleic acid distillation process, fully recovers and utilizes the steam waste heat, plays a role in energy saving and consumption reduction, and increases the economic benefits of the enterprise.

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

[0005] A steam waste heat recovery device for oleic acid production comprises a water storage tank, a gas-liquid separation tank, a water separation bag and a distillation tower which are connected in sequence through pipelines, valves and pumps; the water outlet of the water storage tank is connected to the water inlet of the gas-liquid separation tank through a pipeline and a first centrifugal pump; the gas-liquid separation tank is provided with a liquid outlet and a gas outlet, the liquid outlet is connected to the water inlet of the water separation bag through a pipeline and a second centrifugal pump, and the gas outlet is connected to the air inlet of the steam bag through a pipeline; the water outlet of the water separation bag is connected to the water inlet of the distillation tower through a pipeline, the air outlet of the distillation tower is connected to the air inlet of the gas-liquid separation tank through a pipeline, and the gas outlet of the gas-liquid separation tank is connected to the air inlet of the steam bag; a total condenser, a raw material preheating heat exchanger and a steam generator are arranged in sequence on the top of the distillation tower from top to bottom.

[0006] Preferably, a heat-insulating layer is provided on the outer wall of the gas-liquid separation tank. The gas-liquid separation tank is configured in a cylindrical shape, with a liquid collector at the lower part of the tower body and a drain at the bottom.

[0007] Preferably, the first centrifugal pump and the second centrifugal pump are both JDR80-50-200A centrifugal pumps produced by Jiangsu Jiangda Pump Manufacturing Co., Ltd.

[0008] Preferably, the outer wall of the water diversion bag is provided with a heat-insulating layer.

[0009] Preferably, there are several distillation towers, the water outlets of the water separation bags are connected to the water inlets of the steam generators in the distillation towers through pipelines, and the steam outlets of the steam generators are connected to the air inlets of the gas-liquid separation tanks through pipelines.

[0010] Preferably, the steam outlet of the steam drum is connected to a low-pressure steam using device through a pipeline.

[0011] Preferably, the steam generator is a shell-and-tube heat exchanger.

[0012] Preferably, the raw material preheating heat exchanger is a shell and tube heat exchanger, with material passing through the tube side and water passing through the shell side. The shell and tube heat exchanger includes a shell, a heat transfer tube bundle, a tube sheet, a baffle (baffle) and a tube box. The shell is cylindrical, with a tube bundle inside, and both ends of the tube bundle are fixed on the tube sheet. Preheating the material after hydrolysis in the previous process before entering the dehydration tower can effectively reduce the energy consumption used for material dehydration. The dehydrated material is then transported to the distillation tower for distillation.

[0013] Preferably, the full condenser is a shell and tube heat exchanger, with material passing through the tube side and water passing through the shell side. The shell and tube heat exchanger includes a shell, a heat transfer tube bundle, a tube sheet, a baffle (baffle), a tube box and other devices. The shell is cylindrical, with a tube bundle inside, and both ends of the tube bundle are fixed on the tube sheet. The main function is to reduce the temperature of the distilled material, so that as much high-quality material as possible remains in the distillation tower, and reduce the proportion of oleic acid and linoleic acid taken away in the evaporated light components.

[0014] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0015] After the utility model sends 60℃-70℃ hot water into the steam generator in the distillation tower, the high-temperature material generated in the distillation tower rises to the top of the distillation tower to exchange heat with the steam generator. This process can not only reduce the material temperature but also make the hot water in the steam generator absorb the heat of the material to increase the temperature, so that the water temperature reaches 140℃-150℃ and becomes 0.1-0.4MPa low-pressure steam. The 0.1-0.4MPa low-pressure steam is transported to the steam drum for temporary storage and then enters other production equipment for use as storage tank heating, pipeline heating, supplementary high-pressure steam, etc., which can fully reduce the heat waste of the original distillation equipment; at the same time, the material hydrolyzed in the previous process is preheated by the raw material preheating heat exchanger arranged on the upper part of the steam generator before entering the dehydration tower, which also reduces the energy consumption used for material dehydration.

[0016] In short, the utility model has a simple structure, can fully recycle and utilize the waste heat of steam, plays a role in energy saving and consumption reduction, and increases the economic benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a structural schematic diagram of an embodiment of the utility model;

[0018] In the figure, 1. water storage tank; 2. gas-liquid separation tank; 3. water separation bag; 4. distillation tower; 5. first centrifugal pump; 6. second centrifugal pump; 7. steam bag; 8. full condenser; 9. raw material preheating heat exchanger; 10. steam generator. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Embodiment 1:

[0021] like Figure 1 As shown, a steam waste heat recovery device for oleic acid production comprises a water storage tank 1, a gas-liquid separation tank 2, a water separation bag 3 and a distillation tower 4 which are connected in sequence through a pipeline (unmarked), a valve (unmarked) and a pump (unmarked); the water outlet of the water storage tank 1 is connected to the water inlet of the gas-liquid separation tank 2 through a pipeline and a first centrifugal pump 5; the gas-liquid separation tank 2 is provided with a liquid outlet (unmarked) and a gas outlet (unmarked), the liquid outlet is connected to the water inlet of the water separation bag 3 through a pipeline and a second centrifugal pump 6, and the gas outlet is connected to the air inlet of the steam bag 7 through a pipeline; the water outlet of the water separation bag 3 is connected to the water inlet of the distillation tower 4 through a pipeline, the air outlet of the distillation tower 4 is connected to the air inlet of the gas-liquid separation tank 2 through a pipeline, and the gas outlet of the gas-liquid separation tank 2 is connected to the air inlet of the steam bag 7; the top of the distillation tower 4 is provided with a total condenser 8, a raw material preheating heat exchanger 9 and a steam generator 10 in sequence from top to bottom.

[0022] In actual production: the 60℃-70℃ hot water in the water storage tank 1 is transported into the gas-liquid separation tank 2 through the conveying pipeline under the action of the first centrifugal pump 5. The water in the gas-liquid separation tank 2 enters the water separation bag 3 under the action of the second centrifugal pump 6. The hot water enters the steam generator 10 in each distillation tower 4 from the water separation bag 3. Part of the material being distilled in the distillation tower 4 becomes gaseous due to the high temperature and rises to the top of the distillation tower 4, and exchanges heat with the water in the steam generator 10. After the heat exchange, the water in the steam generator 10 becomes low-pressure steam with a temperature of 150℃-160℃ and a pressure of 0.1-0.4MPa and enters the gas-liquid separation tank 2. After the steam reaches the gas-liquid separation tank 2 The water droplets condensed by the steam when it encounters cold will gather at the bottom of the gas-liquid separation tank 2, and then re-enter the water separation bag. The steam at the upper part of the gas-liquid separation tank 2 enters the steam bag 7, and enters other equipment that requires low-pressure steam through the steam bag 7 for use; the high-temperature gaseous material in the distillation tower 4 is output from the distillation tower 4 to the condenser after heat exchange, and the required fraction is obtained by condensation; the material hydrolyzed in the previous process is preheated by the raw material preheating heat exchanger 9 arranged on the upper part of the steam generator 10, and then enters the dehydration tower (not marked), and the dehydrated material is then transported to the distillation tower 4 for distillation, thereby reducing the heat used to heat the material during the dehydration process, thereby making full use of the waste heat.

[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 steam waste heat recovery device for oleic acid production, characterized in that: It comprises a water storage tank, a gas-liquid separation tank, a water separation bag and a distillation tower which are connected in sequence through pipelines, valves and pumps; the water outlet of the water storage tank is connected to the water inlet of the gas-liquid separation tank through a pipeline and a first centrifugal pump; the gas-liquid separation tank is provided with a liquid outlet and a gas outlet, the liquid outlet is connected to the water inlet of the water separation bag through a pipeline and a second centrifugal pump, and the gas outlet is connected to the air inlet of the steam bag through a pipeline; the water outlet of the water separation bag is connected to the water inlet of the distillation tower through a pipeline, the air outlet of the distillation tower is connected to the air inlet of the gas-liquid separation tank through a pipeline, and the gas outlet of the gas-liquid separation tank is connected to the air inlet of the steam bag; the top of the distillation tower is provided with a total condenser, a raw material preheating heat exchanger and a steam generator in sequence from top to bottom.

2. The steam waste heat recovery device for oleic acid production according to claim 1, characterized in that: The outer walls of the gas-liquid separation tank and the water separation bag are both provided with a heat-insulating layer.

3. The steam waste heat recovery device for oleic acid production according to claim 1, characterized in that: There are several distillation towers, and the water outlets of the water separation bags are connected to the water inlets of the steam generators in the distillation towers through pipelines, and the steam outlets of the steam generators are connected to the air inlets of the gas-liquid separation tanks through pipelines.

4. The steam waste heat recovery device for oleic acid production according to claim 1, characterized in that: The steam generator is a shell-and-tube heat exchanger, and the gas outlet of the steam drum is connected to the low-pressure steam using equipment through a pipeline.

5. The steam waste heat recovery device for oleic acid production according to claim 1, characterized in that: The raw material preheating heat exchanger is a shell and tube heat exchanger, comprising a shell, a heat transfer tube bundle, a tube sheet, a baffle and a tube box; the shell is cylindrical, and a tube bundle is installed inside, and both ends of the tube bundle are fixed on the tube sheet.

6. The steam waste heat recovery device for oleic acid production according to claim 1, characterized in that: The full condenser is a shell and tube heat exchanger, comprising a shell, a heat transfer tube bundle, a tube sheet, a baffle and a tube box; the shell is cylindrical, with a tube bundle installed inside, and both ends of the tube bundle are fixed on the tube sheet.

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