Distillation device for separating diethyl itaconate

Abstract

The utility model discloses a distillation device for separating diethyl itaconate, and relates to the field of distillation devices. A heating device is mounted at the bottom of the distillation retort, a bent steam pipe is mounted above the distillation retort, a heat energy recovery mechanism is mounted at the inclined end of the steam pipe, a condensation mechanism is mounted at the lower end of the heat energy recovery mechanism, and a condensate inlet pipe is arranged at the lower end of the condensation mechanism; a storage tank is arranged at the lower end of the condensate inlet pipe, a discharge port is formed in the bottom of the storage tank, a purification mechanism is mounted at the upper end of the condensate inlet pipe, a preheating mechanism is arranged above one side of the distillation tank, and spiral pipes are arranged in the heat energy recovery mechanism, the condensation mechanism and the preheating mechanism. A mixed liquid inlet pipe is arranged on one side of the preheating mechanism. According to the scheme, the problem that the heat loss of the distillation device in the use process is relatively large is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of distillation devices, in particular to a distillation device for separating diethyl itaconate. Background Art

[0002] Diethyl itaconate is a colorless, transparent, low-toxic, green and safe organic compound with the ability to dissolve polymers. Its molecular formula is C9H 14 O4, with a slight odor, is soluble in most organic solvents, including common solvents such as aromatic hydrocarbons, alcohols, ethers, ketones, organic acids, and esters. Because it contains double bonds at the α and β positions, it is highly reactive and readily undergoes addition reactions, making it a valuable raw material in the chemical synthesis industry. The distillation apparatus used to separate diethyl itaconate is used to purify diethyl itaconate to ensure that the product meets standard requirements.

[0003] For example, the Chinese authorized patent "A Distillation Apparatus" with announcement number CN202860148U includes a distillation flask, a condenser, a receiving flask, a funnel, a stopcock, a ground-mouth stopper, and a liquid guide tube. The distillation flask includes a bottle body and a conical tube. A conical tube is provided at the lower part of the bottle body. The bottle body and the conical tube are connected by threads. A stopcock is provided in the middle of the funnel. The funnel is connected to the liquid guide tube through a ground-mouth stopper. A liquid guide tube is provided in the distillation flask. The distillation flask is connected to the condenser through a catheter. A receiving tube is provided at the lower part of the condenser, and a receiving tube is provided in the receiving flask.

[0004] Although the above-mentioned prior art can be used to separate diethyl itaconate, the heat loss during the distillation and purification process is large, which not only affects the distillation efficiency of the diethyl itaconate mixture but also increases the overall production cost. Therefore, it does not meet the existing needs. In this regard, we propose a distillation device for separating diethyl itaconate. Utility Model Content

[0005] The purpose of the utility model is to provide a distillation apparatus for separating diethyl itaconate, so as to solve the problem of large heat loss during use of the distillation apparatus proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a distillation device for separating diethyl itaconate, comprising a distillation tank; a heating device is installed at the bottom of the distillation tank, a bent steam pipe is installed above the distillation tank, a heat recovery mechanism is installed at the inclined end of the steam pipe, a condensation mechanism is installed at the lower end of the heat recovery mechanism, a condensate inlet pipe is provided at the lower end of the condensation mechanism, a storage tank is provided at the lower end of the condensate inlet pipe, a discharge port is installed at the bottom of the storage tank, a purification mechanism is installed at the upper end of the condensate inlet pipe, a preheating mechanism is provided above one side of the distillation tank, spiral tubes are provided inside the heat recovery mechanism, the condensation mechanism and the preheating mechanism, and a mixed liquid inlet pipe is provided on one side of the preheating mechanism.

[0007] Preferably, a heat storage tank is provided below the heat energy recovery mechanism, a temperature sensor is installed on one side of the inner cavity of the heat storage tank, a circulation inlet pipe is provided on one side of the lower end of the heat energy recovery mechanism, and the lower end of the circulation inlet pipe extends to the interior of the heat storage tank, and a circulation outlet pipe is provided on the other side of the lower end of the heat energy recovery mechanism, and the circulation outlet pipe is communicated with the inner cavity of the heat storage tank.

[0008] Preferably, a hot water inlet pipe is installed on one side of the lower end of the preheating mechanism, and the hot water inlet pipe extends to the interior of the heat storage tank. A hot water outlet pipe is installed on the other side of the lower end of the preheating mechanism, and the hot water outlet pipe is communicated with the inner cavity of the heat storage tank.

[0009] Preferably, a cold water tank is provided below the condensing mechanism, a cold water inlet pipe extending into the cold water tank is provided on one side of the bottom of the condensing mechanism, and a cold water outlet pipe connected to the cold water tank is provided on the other side of the bottom of the condensing mechanism.

[0010] Preferably, an evaporator for cooling the liquid in the cold water tank is provided at the bottom of the cold water tank.

[0011] Preferably, pumps are installed outside the circulation inlet pipe, the hot water inlet pipe and the cold water inlet pipe.

[0012] Preferably, three layers of supporting mesh plates are provided inside the purification mechanism, which divide the purification mechanism into two upper and lower cavities. Activated carbon particles are provided in the upper cavity, and zeolite is provided in the lower cavity. An exhaust pipe is provided above the purification mechanism.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model is provided with a heat recovery mechanism. The heated diethyl itaconate mixed liquid generates steam, which enters the spiral tube inside the heat recovery mechanism through the steam pipe. The pump on the circulation inlet pipe is turned on to transport the liquid inside the heat storage tank to the heat recovery mechanism, and the liquid circulation is realized through the circulation outlet pipe. During the circulation process, heat exchange is generated with the steam in the spiral tube. On the one hand, the steam is cooled and condensed, and on the other hand, the liquid in the heat recovery mechanism is heated. The temperature sensor inside the heat storage tank monitors the liquid temperature in real time. After reaching the set temperature, the pump on the hot water inlet pipe is turned on to transport hot water to the inside of the preheating mechanism. The diethyl itaconate mixed liquid enters the spiral tube inside the preheating mechanism through the mixed liquid inlet pipe, exchanges heat with the hot water, and realizes preheating of the diethyl itaconate mixed liquid. After entering the distillation tank, the diethyl itaconate mixed liquid can quickly reach the evaporation temperature in conjunction with the heating device, thereby improving the distillation efficiency.

[0015] 2. The utility model sets an evaporator at the bottom of the cold water tank, and the evaporator is equipped with a condenser, a compressor and an expansion valve. The refrigerant is converted into high-pressure gas by the compressor, and is condensed and releases heat to become high-pressure liquid by the condenser. The high-pressure liquid is converted into low-temperature and low-pressure liquid by the expansion valve, and then evaporates and absorbs heat by the evaporator to become low-temperature and low-pressure gas, thereby cooling the liquid inside the cold water tank. By turning on the pump on the cold water inlet pipe, the cold water is transported to the condensing mechanism and circulated in conjunction with the cold water outlet pipe to ensure that the cold water is maintained at a low temperature for a long time. The steam after heat recovery generates heat exchange with the cold water again, thereby ensuring that the diethyl itaconate in the steam is completely condensed, thereby improving the extraction effect of diethyl itaconate.

[0016] 3. The utility model is provided with a purification mechanism. When the residual exhaust gas after condensation enters the purification mechanism through the upper end of the condensate inlet pipe, it first passes through the zeolite layer. The zeolite uses its high efficiency and selective adsorption capacity to adsorb organic substances such as VOCs in the exhaust gas. The exhaust gas continues to pass through the activated carbon particle layer. The activated carbon further adsorbs harmful gases, particulate matter and remaining organic matter in the exhaust gas. After the double purification of the zeolite layer and the activated carbon particle layer, the pollutant concentration in the exhaust gas is significantly reduced to meet the emission standard or a lower level. By arranging a purification mechanism containing zeolite and activated carbon particles at the exhaust port of the distillation device, the exhaust gas generated in the process of distillation and separation of diethyl itaconate can be effectively purified, thereby reducing pollutant emissions and protecting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 3It is a top view of the utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the purification mechanism of the present utility model.

[0021] In the figure: 1. Distillation tank; 2. Heating device; 3. Steam pipe; 4. Heat recovery mechanism; 5. Condensation mechanism; 6. Storage tank; 7. Condensate inlet pipe; 8. Purification mechanism; 9. Exhaust pipe; 10. Mixed liquid inlet pipe; 11. Preheating mechanism; 12. Heat storage tank; 13. Cold water tank; 14. Circulation inlet pipe; 15. Circulation outlet pipe; 16. Hot water inlet pipe; 17. Hot water outlet pipe; 18. Cold water inlet pipe; 19. Cold water outlet pipe; 20. Spiral tube; 21. Temperature sensor; 22. Evaporator; 23. Discharge port; 24. Support mesh plate; 25. Activated carbon particles; 26. Zeolite. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] See also Figure 1-4 The utility model provides an embodiment: a distillation device for separating diethyl itaconate, comprising a distillation tank 1; a heating device 2 is installed at the bottom of the distillation tank 1, a bent steam pipe 3 is installed above the distillation tank 1, a heat recovery mechanism 4 is installed at the inclined end of the steam pipe 3, a condensing mechanism 5 is installed at the lower end of the heat recovery mechanism 4, a condensing mechanism 5 is installed at the lower end of the condensing mechanism 5, a condensate inlet pipe 7 is provided at the lower end of the condensate inlet pipe 7, a storage tank 6 is provided at the lower end of the storage tank 6, a discharge port 23 is installed at the bottom of the storage tank 6, a purification mechanism 8 is installed at the upper end of the condensate inlet pipe 7, a preheating mechanism 11 is provided above one side of the distillation tank 1, a spiral tube 20 is provided inside the heat recovery mechanism 4, the condensing mechanism 5 and the preheating mechanism 11, and a mixed liquid inlet pipe 10 is provided on one side of the preheating mechanism 11.

[0024] See also Figure 1 and Figure 2A heat storage tank 12 is provided below the heat recovery mechanism 4, and a temperature sensor 21 is installed on one side of the inner cavity of the heat storage tank 12. A circulation inlet pipe 14 is provided on one side of the lower end of the heat recovery mechanism 4, and the lower end of the circulation inlet pipe 14 extends to the interior of the heat storage tank 12. A circulation outlet pipe 15 is provided on the other side of the lower end of the heat recovery mechanism 4, and the circulation outlet pipe 15 is connected to the inner cavity of the heat storage tank 12. The heated diethyl itaconate mixed liquid generates steam, which enters the spiral tube 20 inside the heat recovery mechanism 4 through the steam pipe 3. The pump on the circulation inlet pipe 14 is turned on to transport the liquid inside the heat storage tank 12 to the heat recovery mechanism 4, and the liquid circulation is realized through the circulation outlet pipe 15. During the circulation process, heat exchange is generated with the steam in the spiral tube 20, which on the one hand cools down the steam and accelerates condensation, and on the other hand heats the liquid in the heat recovery mechanism 4.

[0025] See also Figure 1 、 Figure 2 and Figure 3 A hot water inlet pipe 16 is installed on one side of the lower end of the preheating mechanism 11, and the hot water inlet pipe 16 extends to the interior of the heat storage tank 12. A hot water outlet pipe 17 is installed on the other side of the lower end of the preheating mechanism 11, and the hot water outlet pipe 17 is communicated with the inner cavity of the heat storage tank 12. The temperature sensor 21 monitors the liquid temperature in real time. After reaching the set temperature, the pump on the hot water inlet pipe 16 is turned on to transport hot water to the interior of the preheating mechanism 11. The diethyl itaconate mixed liquid enters the spiral tube 20 inside the preheating mechanism 11 through the mixed liquid inlet pipe, generates heat exchange with the hot water, and realizes the preheating of the diethyl itaconate mixed liquid. Then, after entering the distillation tank 1, the diethyl itaconate mixed liquid can quickly reach the evaporation temperature in conjunction with the heating device.

[0026] See also Figure 1 and Figure 2 A cold water tank 13 is provided below the condensing mechanism 5. A cold water inlet pipe 18 extending to the inside of the cold water tank 13 is provided on one side of the bottom of the condensing mechanism 5. A cold water outlet pipe 19 connected to the cold water tank 13 is provided on the other side of the bottom of the condensing mechanism 5. An evaporator 22 for refrigerating the liquid in the cold water tank 13 is provided at the bottom of the cold water tank 13. Pumps are installed on the outside of the circulation inlet pipe 14, the hot water inlet pipe 16 and the cold water inlet pipe 18. The evaporator 22 is equipped with a condenser, a compressor and an expansion valve. The refrigerant is converted into The high-pressure gas is condensed and releases heat to become a high-pressure liquid through the condenser. The high-pressure liquid is converted into a low-temperature, low-pressure liquid through the expansion valve. Then, it is evaporated and absorbs heat through the evaporator to become a low-temperature, low-pressure gas, thereby cooling the liquid inside the cold water tank 13. By turning on the pump on the cold water inlet pipe 18, the cold water is transported to the condensing mechanism 5 and circulated in conjunction with the cold water outlet pipe 19 to ensure that the cold water is maintained at a low temperature for a long time. The steam that has recovered heat exchanges heat with the cold water again, thereby ensuring that the diethyl itaconate in the steam is completely condensed.

[0027] See also Figure 1 and Figure 4 , the interior of the purification mechanism 8 is provided with three layers of supporting mesh plates 24, and the three layers of supporting mesh plates 24 divide the purification mechanism 8 into two upper and lower cavities. Activated carbon particles 25 are provided in the upper cavity, and zeolite 26 is provided in the lower cavity. An exhaust pipe 9 is provided above the purification mechanism 8. When the residual exhaust gas after condensation enters the purification mechanism 8 through the upper end of the condensate inlet pipe 7, it first passes through the zeolite layer. The zeolite uses its high efficiency and selective adsorption capacity to adsorb organic substances such as VOCs in the exhaust gas. The exhaust gas continues to pass through the activated carbon particle layer, and the activated carbon further adsorbs harmful gases, particulate matter and remaining organic matter in the exhaust gas. After the double purification of the zeolite layer and the activated carbon particle layer, the pollutant concentration in the exhaust gas is significantly reduced, reaching the emission standard or lower level. By arranging a purification mechanism comprising zeolite and activated carbon particles at the exhaust port of the distillation device, the exhaust gas generated in the process of distillation and separation of diethyl itaconate can be effectively purified, and pollutant emissions can be reduced.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A distillation apparatus for separating diethyl itaconate, comprising a distillation tank (1); characterized in that: A heating device (2) is installed at the bottom of the distillation tank (1), a bent steam pipe (3) is installed above the distillation tank (1), a heat recovery mechanism (4) is installed at the inclined end of the steam pipe (3), a condensation mechanism (5) is installed at the lower end of the heat recovery mechanism (4), a condensate inlet pipe (7) is provided at the lower end of the condensation mechanism (5), a storage tank (6) is provided at the lower end of the condensate inlet pipe (7), a discharge port (23) is installed at the bottom of the storage tank (6), a purification mechanism (8) is installed at the upper end of the condensate inlet pipe (7), a preheating mechanism (11) is provided above one side of the distillation tank (1), a spiral tube (20) is provided inside the heat recovery mechanism (4), the condensation mechanism (5) and the preheating mechanism (11), and a mixed liquid inlet pipe (10) is provided on one side of the preheating mechanism (11).

2. A distillation apparatus for separating diethyl itaconate according to claim 1, characterized in that: A heat storage tank (12) is provided below the heat energy recovery mechanism (4), a temperature sensor (21) is installed on one side of the inner cavity of the heat storage tank (12), a circulation inlet pipe (14) is provided on one side of the lower end of the heat energy recovery mechanism (4), and the lower end of the circulation inlet pipe (14) extends to the interior of the heat storage tank (12), and a circulation outlet pipe (15) is provided on the other side of the lower end of the heat energy recovery mechanism (4), and the circulation outlet pipe (15) is communicated with the inner cavity of the heat storage tank (12).

3. A distillation apparatus for separating diethyl itaconate according to claim 2, characterized in that: A hot water inlet pipe (16) is installed on one side of the lower end of the preheating mechanism (11), and the hot water inlet pipe (16) extends to the interior of the heat storage tank (12); a hot water outlet pipe (17) is installed on the other side of the lower end of the preheating mechanism (11), and the hot water outlet pipe (17) is communicated with the inner cavity of the heat storage tank (12).

4. A distillation apparatus for separating diethyl itaconate according to claim 3, characterized in that: A cold water tank (13) is provided below the condensing mechanism (5), a cold water inlet pipe (18) extending into the interior of the cold water tank (13) is provided on one side of the bottom of the condensing mechanism (5), and a cold water outlet pipe (19) connected to the cold water tank (13) is provided on the other side of the bottom of the condensing mechanism (5).

5. A distillation apparatus for separating diethyl itaconate according to claim 4, characterized in that: An evaporator (22) for cooling the liquid in the cold water tank (13) is provided at the bottom of the cold water tank (13).

6. A distillation apparatus for separating diethyl itaconate according to claim 4, characterized in that: Pumps are installed outside the circulation inlet pipe (14), the hot water inlet pipe (16) and the cold water inlet pipe (18).

7. A distillation apparatus for separating diethyl itaconate according to claim 1, characterized in that: The purification mechanism (8) is provided with three layers of supporting mesh plates (24) inside, which divide the purification mechanism (8) into two upper and lower cavities. The upper cavity is provided with activated carbon particles (25), and the lower cavity is provided with zeolite (26). An exhaust pipe (9) is provided above the purification mechanism (8).

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