Furfuryl alcohol residual liquid evaporation device

Abstract

A furfuryl alcohol residual liquid evaporation device comprises a tank body and a discharging port in the center of the bottom of the tank body, an inner layer of U-shaped bolts and an outer layer of U-shaped bolts are fixed in the tank body through a plurality of pieces of vertical angle steel, an inner spiral coil pipe penetrates through each U-shaped bolt on the inner layer, and the lower end of the inner spiral coil pipe is fixedly communicated with an inner coil pipe outlet penetrating through the tank body. The outer spiral coil penetrates through each U-shaped bolt on the outer layer, the upper end of the outer spiral coil is fixedly communicated with an outer coil inlet penetrating through the tank body, the tank body is vertically arranged, the top end of the tank body is fixedly communicated with a buffer tank with the diameter smaller than that of the tank body, an alcohol steam outlet is formed in the top of the buffer tank, and a crude alcohol inlet is further formed in one side of the top of the tank body. When furfuryl alcohol residual liquid steam is discharged, furfuryl alcohol steam flowing through the alcohol steam outlet firstly passes through the buffer tank and is buffered through the buffer tank, the pressure of the alcohol steam outlet during discharging can be effectively reduced, and a blocking structure is formed at the top of the tank body on the periphery of the bottom of the buffer tank, so that liquid furfuryl alcohol in the furfuryl alcohol steam can be prevented from being brought out when the furfuryl alcohol steam is discharged.

Description

Technical Field

[0001] This utility model relates to a furfuryl alcohol production device, specifically a furfuryl alcohol residual liquid evaporation device. Background Technology

[0002] The furfuryl alcohol residue tank is a special equipment used in chemical production to treat residual liquids from the production or use of furfuryl alcohol (furan methanol). It is mainly used to collect, temporarily store, or further treat residual liquids after the furfuryl alcohol reaction (such as unreacted raw materials, by-products, waste solvents, etc.).

[0003] The main working principle is: evaporation and concentration. The residual liquid is heated by a heating device to evaporate some of the solvent or low-boiling-point substances, thereby increasing the concentration of the target substance in the residual liquid. For example, the residual liquid containing furfuryl alcohol and other impurities is heated to vaporize low-boiling-point substances such as water, leaving furfuryl alcohol and high-boiling-point impurities with a higher concentration.

[0004] Distillation separation: Based on the differences in boiling points of different substances, by controlling conditions such as temperature and pressure, various components in the residual liquid are vaporized and condensed sequentially at different temperatures, thereby achieving separation. For example, furfuryl alcohol has a different boiling point than other impurities. At a suitable temperature, furfuryl alcohol first vaporizes into steam, and then is collected by condensation, thus separating it from other impurities.

[0005] Chemical reaction: In some cases, specific reagents may be added to the residual liquid tank to react chemically with certain components in the residual liquid, transforming difficult-to-treat substances into substances that are easy to separate or recycle. For example, adding alkaline substances can react with acidic impurities in the residual liquid to generate salts, which can then be separated by methods such as filtration.

[0006] Structural Features: The vessel body is typically made of corrosion-resistant metal materials such as stainless steel to withstand the corrosiveness of the residual liquid and the temperature and pressure changes during the heating process. The vessel body has a certain volume, which varies depending on the production scale and the amount of residual liquid to be processed. Heating methods generally include steam heating, electric heating, or thermal oil heating. For example, steam heating involves introducing steam into the vessel jacket or built-in heating coils through steam pipes to heat the residual liquid using the heat of the steam. Electric heating uses electric heating elements installed on the vessel body to directly heat the residual liquid. The vessel consists of a motor, stirring shaft, and stirring paddle, ensuring uniform heating of the residual liquid during heating and reaction, promoting thorough mixing and reaction between substances, and improving processing efficiency. The inlet is used to introduce furfuryl alcohol residual liquid into the vessel, while the outlet is used to discharge the treated residual liquid or recovered products. Some vessel bodies may also have multiple outlets to separately discharge substances from different processing stages or with different components. Temperature and pressure sensors are equipped to monitor the temperature and pressure inside the vessel in real time. The control system adjusts parameters such as heating and feed rate to ensure that the temperature and pressure inside the vessel remain within the set range, guaranteeing operational safety and stability.

[0007] However, the current furfuryl alcohol residue evaporation device has an unreasonable layout design of the heating device, which cannot effectively utilize the heat source and has low heating efficiency. In addition, the tank lacks a buffer structure, which can easily cause excessive instantaneous pressure when steam is discharged. Utility Model Content

[0008] To address the aforementioned problems, the purpose of this invention is to provide a furfuryl alcohol residual liquid evaporation device.

[0009] To achieve the above objectives, the technical solution of this utility model is as follows: a furfuryl alcohol residual liquid evaporation device, comprising a tank body and a discharge port at the center of the bottom of the tank body. Multiple vertical angle steels are used to fix two layers of U-shaped bolts inside the tank body. An inner spiral coil penetrates each U-shaped bolt in the inner layer, and the upper end of the inner spiral coil is fixedly connected to an inner coil inlet penetrating the tank body, while the lower end of the inner spiral coil is fixedly connected to an inner coil outlet penetrating the tank body. An outer spiral coil penetrates each U-shaped bolt in the outer layer, and the upper end of the outer spiral coil is fixedly connected to an outer coil inlet penetrating the tank body, while the lower end of the outer spiral coil is fixedly connected to an outer coil outlet penetrating the tank body. The tank body is vertically arranged, and a buffer tank with a diameter smaller than the tank body is fixedly connected to the top. An alcohol vapor outlet is provided at the top of the buffer tank, and a crude alcohol inlet is also provided on one side of the top of the tank body.

[0010] Furthermore, the buffer tank and the tank body are connected by flanges and then fixed with bolts and nuts, and the connection point is equipped with a high-pressure resistant sealing ring.

[0011] Furthermore, an upward-sloping manhole is provided on the top of the tank on one side of the buffer tank, and the manhole is covered with a sealing cover for personnel to enter the tank for maintenance.

[0012] Furthermore, the top of the buffer tank on the side of the alcohol vapor outlet is also equipped with an upward-sloping handhole for personnel to reach in and work during maintenance.

[0013] Furthermore, the buffer tank has a side manhole with a sealing cap on its side wall.

[0014] Furthermore, the water inlet is located on one side of the top of the buffer tank, and a spare inlet is also provided on one side of the buffer tank.

[0015] Furthermore, the top of the tank is also equipped with a thermometer port and a pressure gauge interface.

[0016] This invention utilizes a heating medium (such as steam or heat transfer oil) to exchange heat with furfuryl alcohol liquid. The heating medium passes through an inner and outer spiral coil that fills the tank, forming two layers of spiral-shaped, uniform, and comprehensive heating channels. This allows for faster and more even heat transfer to the furfuryl alcohol, raising its temperature to its boiling point. This heat exchange structure not only fully covers the product in contact with the product, maximizing heat energy utilization and effectively reducing heat loss, but also features a simple and reasonable design that eliminates the need for regular inspections and maintenance, resulting in low maintenance costs. Furthermore, the internal temperature of the tank can be easily controlled simply by adjusting the inflow and outflow of the inner and outer spiral coils, eliminating the need for a complex control system and reducing operational complexity.

[0017] In addition, when the steam generated after the residual furfuryl alcohol evaporates is discharged, since the alcohol vapor outlet is located at the top of the buffer tank, and the buffer tank is located at the top of the tank body, and the diameter of the buffer tank is smaller than that of the tank body, the furfuryl alcohol vapor flowing through the alcohol vapor outlet first passes through the buffer tank, stays in the buffer tank, and is buffered by the buffer tank, forming a certain compressible space, which can effectively reduce the pressure when the alcohol vapor is discharged from the outlet. Furthermore, the bottom of the buffer tank and the top of the tank body form a blocking structure, which can prevent the furfuryl alcohol vapor from carrying out the internal liquid furfuryl alcohol when it is discharged. Attached Figure Description

[0018] The present invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0020] Figure 2 This is a top view of the structure of this utility model. Detailed Implementation

[0021] like Figure 1-2 As shown, a furfuryl alcohol residual liquid evaporation device includes a tank body 1 and a discharge port 2 at the center of the bottom of the tank body 1. Multiple vertical angle steels 3 are used to fix two layers of U-bolts 4 inside the tank body 1. An inner spiral coil 5 penetrates each of the inner U-bolts 4, and the upper end of the inner spiral coil 5 is fixedly connected to an inner coil inlet 6 penetrating the tank body 1. The lower end of the inner spiral coil 5 is fixedly connected to an inner coil outlet 7 penetrating the tank body 1. An outer spiral coil 8 penetrates each of the outer U-bolts 4, and the upper end of the outer spiral coil 8 is fixedly connected to an outer coil inlet 9 penetrating the tank body 1. The lower end of the outer spiral coil 8 is fixedly connected to an outer coil outlet 10 penetrating the tank body 1. The tank body 1 is vertically arranged, and a buffer tank 11 with a diameter smaller than the tank body 1 is fixedly connected to its top. An alcohol vapor outlet 12 is provided at the top of the buffer tank 11, and a crude alcohol inlet is also provided on one side of the top of the tank body 1.

[0022] Specifically: The buffer tank 11 and the tank body 1 are connected by flange 13 and then fixed by bolts and nuts. The connection part is equipped with a high-pressure resistant sealing ring. A manhole 14 with an upward angle is provided on the top of the tank body 1 on one side of the buffer tank 11. The manhole 14 is covered with a sealing cover. A side manhole 16 with a sealing cover is provided on the side wall of the buffer tank 11 for personnel to enter the tank body 1 for maintenance. A hand hole 15 with an upward angle is also provided on the top of the buffer tank 11 on the side of the alcohol vapor outlet 12 for personnel to reach in and work during maintenance. A water inlet 17 is provided on the top side of the buffer tank 11. A spare port 18 is also provided on one side of the buffer tank 11. A thermometer port and a pressure gauge interface are also provided on the top of the tank body 1.

[0023] Working principle of this utility model

[0024] Heat transfer principle: The furfuryl alcohol reboiler exchanges heat with the furfuryl alcohol liquid through a heating medium (such as steam, heat transfer oil, etc.). The heating medium is heated through the inner spiral coil 5 and the outer spiral coil 8 that fill the tank 1. The inner spiral coil 5 and the outer spiral coil 8 form two layers of spiral uniform and comprehensive heating channels, which transfer heat to the furfuryl alcohol more quickly and evenly, raising its temperature to the boiling point.

[0025] Phase equilibrium principle: In the furfuryl alcohol reboiler, the furfuryl alcohol liquid is heated and vaporized, forming a vapor-liquid two-phase equilibrium. The generated vapor is rich in light components and returns to the relevant tower, where it undergoes mass and heat transfer with the liquid descending in the tower, thereby achieving the process objectives of furfuryl alcohol separation and purification.

[0026] Circulation principle: The circulation method varies depending on the type of reboiler. For example, the thermosiphon reboiler relies on the density difference between the liquid at the bottom of the column and the vapor-liquid mixture in the reboiler to generate natural circulation power; the forced circulation reboiler uses a pump to drive the furfuryl alcohol liquid to circulate, so that it continuously flows through the reboiler and is heated.

[0027] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A furfuryl alcohol residual liquid evaporation device, comprising a tank (1) and a discharge port (2) at the center of the bottom of the tank (1), characterized in that: The tank (1) is fixed with two layers of U-bolts (4) inside and outside by multiple vertical angle steels (3). The inner spiral coil (5) passes through each U-bolt (4) of the inner layer. The upper end of the inner spiral coil (5) is fixedly connected to the inner coil inlet (6) that passes through the tank (1). The lower end of the inner spiral coil (5) is fixedly connected to the inner coil outlet (7) that passes through the tank (1). The outer spiral coil (8) passes through each U-bolt (4) of the outer layer. The upper end of the outer spiral coil (8) is fixedly connected to the outer coil inlet (9) that passes through the tank (1). The lower end of the outer spiral coil (8) is fixedly connected to the outer coil outlet (10) that passes through the tank (1). The tank (1) is set vertically. The top end is fixedly connected to a buffer tank (11) with a diameter smaller than that of the tank (1) body. The top of the buffer tank (11) is provided with an alcohol vapor outlet (12). The top side of the tank (1) is also provided with a crude alcohol inlet.

2. The furfuryl alcohol residual liquid evaporation device as described in claim 1, characterized in that: The buffer tank (11) and the tank body (1) are connected by flange (13) and fixed by bolts and nuts, and the connection part is equipped with a high pressure resistant sealing ring.

3. The furfuryl alcohol residual liquid evaporation device as described in claim 1, characterized in that: The top of the tank body (1) on one side of the buffer tank (11) is provided with an upward-sloping manhole (14), which is covered with a sealing cap.

4. The furfuryl alcohol residual liquid evaporation device as described in claim 1, characterized in that: The top of the buffer tank (11) on the side of the alcohol vapor outlet (12) is also provided with an upward-sloping hand hole (15).

5. The furfuryl alcohol residual liquid evaporation device as described in claim 1, characterized in that: The buffer tank (11) has a side manhole (16) with a sealing cover on its side wall.

6. The furfuryl alcohol residual liquid evaporation device as described in claim 1, characterized in that: A water inlet (17) is located on the top side of the buffer tank (11), and a spare inlet (18) is also provided on one side of the buffer tank (11).

7. The furfuryl alcohol residual liquid evaporation device as described in claim 1, characterized in that: The top of the tank (1) is also equipped with a thermometer port and a pressure gauge interface.

Images