A furfuryl alcohol evaporation system

Abstract

The utility model relates to the technical field of fine chemicals, and in particular to a furfuryl alcohol evaporation system. The system comprises: a raw material buffer tank, which is used to store liquid furfuryl alcohol; a heater, which is connected to the raw material buffer tank, and is used to heat the liquid furfuryl alcohol transported from the raw material buffer tank; a buffer tank discharge pump, which is connected to the raw material buffer tank and the heater; a furfuryl alcohol evaporation tower, which is connected to the heater and has a hydrogen inlet on its side wall, and the furfuryl alcohol evaporation tower is used to heat the mixed gaseous furfuryl alcohol and hydrogen; a circulating pump, which is connected to the liquid phase outlet at the bottom of the furfuryl alcohol evaporation tower and the heater, and is used to transport the unvaporized furfuryl alcohol in the furfuryl alcohol evaporation tower to the heater for heating. The utility model effectively solves the technical problem in the prior art that the incomplete vaporization of furfuryl alcohol leads to uneven concentration of the mixed gas of furfuryl alcohol and hydrogen, which affects the continuous progress of subsequent reactions.

Description

Technical Field

[0001] The utility model relates to the technical field of fine chemical industry, in particular to a furfuryl alcohol evaporation system. Background Art

[0002] Furfuryl alcohol, also known as 2-furanmethanol, is a colorless to light yellow transparent liquid. It is easily soluble in water and a variety of organic solvents. It has good solubility and processability, and has strong reducibility and stability. It can react with a variety of compounds to generate products with different functions. It is widely used in chemical, pharmaceutical, fuel and other fields.

[0003] The melting point of furfuryl alcohol is -29℃ and its boiling point is 170℃. Since its melting point is much lower than room temperature and its boiling point is relatively high, furfuryl alcohol is naturally in liquid state at room temperature. At the same time, due to its high boiling point, furfuryl alcohol is not easy to volatilize during storage and transportation, which improves the safety of furfuryl alcohol storage. Liquid furfuryl alcohol is also easier to transport through pipelines, pumps and other equipment, which improves the efficiency of transportation. In addition, liquid furfuryl alcohol can be more accurately measured and distributed during production and testing, which is conducive to precise control during production and testing.

[0004] In the experimental process of fine chemical industry, furfuryl alcohol is usually required to be vaporized first, and then the vaporized furfuryl alcohol is mixed with hydrogen, and then the mixed gas of furfuryl alcohol and hydrogen is involved in the subsequent reaction section to ensure the continuous progress of the subsequent reaction section. However, due to the high boiling point of furfuryl alcohol, a sufficiently high temperature is usually required to ensure its complete vaporization so as to mix with hydrogen. In actual operation, it is very easy to cause incomplete vaporization of furfuryl alcohol due to improper temperature control, resulting in excessive or low local concentration of the mixed gas of furfuryl alcohol and hydrogen, affecting the uniformity of mixing, and thus affecting the continuous progress of the subsequent reaction. Utility Model Content

[0005] The utility model provides a furfuryl alcohol evaporation system to solve the technical problem in the prior art that incomplete vaporization of furfuryl alcohol leads to uneven concentration of mixed gas between furfuryl alcohol and hydrogen, thus affecting the continuous progress of subsequent reactions.

[0006] In order to solve the above problems, the furfuryl alcohol evaporation system provided by the utility model adopts the following technical solutions:

[0007] A furfuryl alcohol evaporation system, comprising:

[0008] A raw material buffer tank, which is used to store liquid furfuryl alcohol;

[0009] a heater connected to the raw material buffer tank for heating the liquid furfuryl alcohol transported from the raw material buffer tank;

[0010] a buffer tank discharge pump connected to the raw material buffer tank and the heater, for extracting liquid furfuryl alcohol from the raw material buffer tank, pressurizing it and then delivering it to the heater;

[0011] A furfuryl alcohol evaporation tower, which is connected to the heater and has a hydrogen inlet on its side wall, and is used to heat the mixed gaseous furfuryl alcohol and hydrogen;

[0012] A circulation pump is connected to the liquid phase outlet at the bottom of the furfuryl alcohol evaporation tower and the heater to transport the unvaporized furfuryl alcohol in the furfuryl alcohol evaporation tower to the heater for heating.

[0013] The furfuryl alcohol evaporation system provided by the utility model has the following beneficial effects: 1) the extracted liquid furfuryl alcohol is pressurized by the buffer tank discharge pump, and then the liquid furfuryl alcohol is transported to the heater. Pressurizing the liquid furfuryl alcohol can reduce the distance between small molecules of furfuryl alcohol and enhance the intermolecular forces. When heated, the enhanced intermolecular forces can help the liquid furfuryl alcohol to be converted into gas more quickly, and can improve the vaporization rate and reduce energy consumption, thereby improving the uniformity of the concentration of the mixed gas of furfuryl alcohol and hydrogen; 2) by arranging a circulation pump between the liquid phase outlet at the bottom of the furfuryl alcohol evaporation tower and the heater, the circulation pump can be used to collect the unvaporized furfuryl alcohol in the furfuryl alcohol evaporation tower, and transport it to the heater for heating, so as to vaporize the unvaporized furfuryl alcohol again, thereby improving the vaporization completion of the furfuryl alcohol; 3) the raw material buffer tank continuously provides liquid furfuryl alcohol to the heater, ensuring that the heater can continuously produce gaseous furfuryl alcohol, thereby ensuring the continuous mixing process of gaseous furfuryl alcohol and hydrogen, and further ensuring the continuous subsequent reaction in which the mixed gas of furfuryl alcohol and hydrogen participates.

[0014] Through the above arrangement, the utility model effectively solves the technical problem in the prior art that incomplete vaporization of furfuryl alcohol leads to uneven concentration of the mixed gas of furfuryl alcohol and hydrogen, thus affecting the continuation of subsequent reactions.

[0015] Furthermore, a liquid level meter and a thermometer are provided at the bottom of the furfuryl alcohol evaporation tower to detect the liquid level and temperature at the bottom of the tower.

[0016] Furthermore, it also includes a controller, which is connected to the liquid level meter and the buffer tank discharge pump to receive the liquid level information of the liquid level meter and control the opening or closing of the buffer tank discharge pump according to the liquid level information.

[0017] Furthermore, the controller is a distributed controller.

[0018] Furthermore, a furfuryl alcohol inlet is provided on the side of the upper portion of the furfuryl alcohol evaporation tower, and the heater is connected to the furfuryl alcohol inlet via a delivery pipeline.

[0019] Furthermore, a gas phase outlet is provided at the top of the furfuryl alcohol evaporation tower for discharging a mixed gas of gaseous furfuryl alcohol and hydrogen.

[0020] Furthermore, a swirl plate is provided above the interior of the furfuryl alcohol evaporation tower.

[0021] Furthermore, a gas-liquid distributor is provided in the furfuryl alcohol evaporation tower, and the gas-liquid distributor is used to separate liquid furfuryl alcohol.

[0022] Furthermore, the gas-liquid distributor is located below the swirl plate.

[0023] Furthermore, the bottom of the furfuryl alcohol evaporation tower is a concave semicircular structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0025] Figure 1 A schematic diagram of the structure of the furfuryl alcohol evaporation system provided by the utility model;

[0026] Figure 2 for Figure 1 Schematic diagram of the structure of the furfuryl alcohol evaporation tower.

[0027] Description of reference numerals:

[0028] 1. Raw material buffer tank; 2. Heater; 3. Buffer tank discharge pump; 4. Furfuryl alcohol evaporation tower; 5. Hydrogen inlet; 6. Circulation pump; 7. Liquid phase outlet; 8. Furfuryl alcohol inlet; 9. Conveying pipeline; 10. Gas phase outlet; 11. Cyclone plate; 12. Gas-liquid distributor. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0030] It should be noted that the main concept of the furfuryl alcohol evaporation system provided by the utility model is: by setting a buffer tank discharge pump to pressurize the liquid furfuryl alcohol from the raw material buffer tank, so as to reduce the distance between furfuryl alcohol molecules, enhance the intermolecular force, so that the vaporization rate of furfuryl alcohol is improved, thereby improving the uniformity of the mixed gas of furfuryl alcohol and hydrogen; by connecting the liquid phase outlet of the furfuryl alcohol evaporation tower with the heater through a circulating pump, using the circulating pump to collect the unvaporized furfuryl alcohol in the furfuryl alcohol evaporation tower, and transporting it to the heater for heating, so as to realize the re-vaporization operation of the unvaporized furfuryl alcohol, thereby improving the vaporization degree of furfuryl alcohol.

[0031] After introducing the basic principle of the utility model, various non-limiting embodiments of the utility model are specifically introduced below. Any number of elements in the drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning.

[0032] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0033] Embodiment 1 of the furfuryl alcohol evaporation system provided by the utility model:

[0034] like Figure 1 and Figure 2 As shown, the furfuryl alcohol evaporation system includes a raw material buffer tank 1, a heater 2, a buffer tank discharge pump 3, a furfuryl alcohol evaporation tower 4 and a circulation pump 6.

[0035] Among them, the raw material buffer tank 1 is connected to the container for storing liquid furfuryl alcohol to receive and store liquid furfuryl alcohol and stabilize the pressure during the transportation of the liquid furfuryl alcohol; the heater 2 is connected to the raw material buffer tank 1 to heat the liquid furfuryl alcohol transported from the raw material buffer tank 1; the buffer tank discharge pump 3 is connected to the raw material buffer tank 1 and the heater 2 to extract the liquid furfuryl alcohol in the raw material buffer tank 1, pressurize the liquid furfuryl alcohol and transport it to the heater 2 for heating; the furfuryl alcohol evaporation tower 4 is connected to the heater 2; the circulation pump 6 is connected to the furfuryl alcohol evaporation tower 4 and the heater 2 to transport the unvaporized furfuryl alcohol in the furfuryl alcohol evaporation tower 4 to the heater 2 for heating.

[0036] Specifically, the buffer tank discharge pump 3 pressurizes the liquid furfuryl alcohol to 0.2 MPaG, and the heater 2 heats the furfuryl alcohol to 110°C.

[0037] About the furfuryl alcohol evaporation tower 4. The furfuryl alcohol evaporation tower 4 has a gas phase outlet 10 at the top, a concave semicircular structure at the bottom, a liquid phase outlet 7 at the center of the semicircle, a furfuryl alcohol inlet 8 at the upper side wall, and a hydrogen inlet 5 at the lower side wall. The gas phase outlet 10 is used to discharge a mixed gas of gaseous furfuryl alcohol and hydrogen. The heater 2 is connected to the furfuryl alcohol inlet 8 by a conveying pipe 9, and the liquid phase outlet 7 is connected to the heater 2 by a circulating pump 6. The furfuryl alcohol evaporation tower 4 is used to heat the mixed gaseous furfuryl alcohol and hydrogen.

[0038] Specifically, a liquid level meter (not shown in the figure) and a thermometer (not shown in the figure) are provided at the bottom of the furfuryl alcohol evaporation tower 4 to detect the liquid level and temperature at the bottom of the tower. The liquid level meter and the buffer tank discharge pump 3 are both connected to a controller (not shown in the figure). The controller is used to receive the liquid level information of the liquid level meter and control the opening or closing of the buffer tank discharge pump 3 according to the liquid level information, thereby controlling the storage amount of liquid furfuryl alcohol in the raw material buffer tank 1; wherein the controller is a distributed controller (DCS controller).

[0039] Specifically, in the furfuryl alcohol evaporation tower 4, the feed molar ratio of hydrogen to gaseous furfuryl alcohol is 16:1, the operating pressure at the top of the furfuryl alcohol evaporation tower 4 is 0.09 MPaG, and the operating temperature is 100-110°C.

[0040] In addition, a cyclone plate 11 and a gas-liquid distributor 12 are sequentially arranged inside the furfuryl alcohol evaporation tower 4 from top to bottom, and the gas-liquid distributor 12 is used to separate liquid furfuryl alcohol.

[0041] The working principle of the furfuryl alcohol evaporation system provided by the utility model is as follows: liquid furfuryl alcohol enters a raw material buffer tank 1 from a storage container, is then pressurized to 0.2 MPaG by a buffer tank discharge pump 3, enters a heater 2 and is heated to 110° C., and then enters a furfuryl alcohol evaporation tower 4 from a furfuryl alcohol inlet 8. At the same time, high-temperature hydrogen enters the furfuryl alcohol evaporation tower 4 from a hydrogen inlet 5, the feed molar ratio of hydrogen to furfuryl alcohol is 16:1, hydrogen and furfuryl alcohol are mixed in the furfuryl alcohol evaporation tower 4, the operating pressure at the top of the tower is 0.09 MPaG, and the operating temperature is 100-110° C. The gas-liquid distributor 12 separates the unvaporized furfuryl alcohol in the furfuryl alcohol evaporation tower 4, and the unvaporized furfuryl alcohol flows into the circulation pump 6 from the liquid phase outlet 7. The circulation pump 6 pressurizes the unvaporized furfuryl alcohol and then conveys it to the heater 2 for reheating. The mixed gas of furfuryl alcohol and hydrogen is discharged from the gas phase outlet 10.

[0042] Embodiment 2 of the furfuryl alcohol evaporation system provided by the utility model:

[0043] The main difference between it and Example 1 is:

[0044] In Example 1, the bottom of the furfuryl alcohol evaporation tower is a concave semicircular structure.

[0045] In this embodiment, the bottom of the furfuryl alcohol evaporation tower is a conical structure with the apex facing downward.

[0046] Embodiment 3 of the furfuryl alcohol evaporation system provided by the utility model:

[0047] The main difference between it and Example 1 is:

[0048] In embodiment 1, the controller is a DCS controller.

[0049] In this embodiment, the controller is a programmable logic controller.

[0050] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside" and other terms indicating orientation or position relationship are based on the orientation or position relationship shown in the drawings of this specification, which are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0051] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A furfuryl alcohol evaporation system, characterized in that: include: A raw material buffer tank, which is used to store liquid furfuryl alcohol; a heater connected to the raw material buffer tank for heating the liquid furfuryl alcohol transported from the raw material buffer tank; a buffer tank discharge pump connected to the raw material buffer tank and the heater, for extracting liquid furfuryl alcohol from the raw material buffer tank, pressurizing it and then delivering it to the heater; A furfuryl alcohol evaporation tower, which is connected to the heater and has a hydrogen inlet on its side wall, and is used to heat the mixed gaseous furfuryl alcohol and hydrogen; A circulation pump is connected to the liquid phase outlet at the bottom of the furfuryl alcohol evaporation tower and the heater to transport the unvaporized furfuryl alcohol in the furfuryl alcohol evaporation tower to the heater for heating.

2. The furfuryl alcohol evaporation system according to claim 1, characterized in that: A liquid level meter and a thermometer are arranged at the bottom of the furfuryl alcohol evaporation tower to detect the liquid level and temperature at the bottom of the tower.

3. The furfuryl alcohol evaporation system according to claim 2, characterized in that: It also includes a controller, which is connected to the liquid level meter and the buffer tank discharge pump to receive the liquid level information of the liquid level meter and control the opening or closing of the buffer tank discharge pump according to the liquid level information.

4. The furfuryl alcohol evaporation system according to claim 3, characterized in that: The controller is a distributed controller.

5. The furfuryl alcohol evaporation system according to any one of claims 1 to 4, characterized in that: A furfuryl alcohol inlet is provided on the side of the upper part of the furfuryl alcohol evaporation tower, and the heater is connected to the furfuryl alcohol inlet through a conveying pipeline.

6. The furfuryl alcohol evaporation system according to any one of claims 1 to 4, characterized in that: A gas phase outlet is provided at the top of the furfuryl alcohol evaporation tower for discharging a mixed gas of gaseous furfuryl alcohol and hydrogen.

7. The furfuryl alcohol evaporation system according to any one of claims 1 to 4, characterized in that: A swirl plate is arranged above the interior of the furfuryl alcohol evaporation tower.

8. The furfuryl alcohol evaporation system according to claim 7, characterized in that: A gas-liquid distributor is arranged in the furfuryl alcohol evaporation tower, and the gas-liquid distributor is used to separate liquid furfuryl alcohol.

9. The furfuryl alcohol evaporation system according to claim 8, characterized in that: The gas-liquid distributor is located below the swirl plate.

10. The furfuryl alcohol evaporation system according to any one of claims 1 to 4, characterized in that: The bottom of the furfuryl alcohol evaporation tower is a concave semicircular structure.

Images