Energy recovery device for solvent recovery

Abstract

The utility model discloses an energy recovery device for solvent recovery, including adsorption unit, the one side of adsorption unit is connected with electric heater, and the one side that electric heater is away from adsorption unit is connected with desorption mechanism, and adsorption unit is connected with energy recovery ware, and energy recovery ware is connected with desorption mechanism, and one side of energy recovery ware is connected with condensation unit, and adsorption unit is connected with condensation unit through short circuit. The utility model adopts horizontal storage tank, and compared with traditional vertical storage tank, single storage tank volume is bigger, and the capacity of adsorption is more, and the area is relatively less. The energy recovery device directly uses gas to carry out heat exchange, and there is no intermediate medium, and heat loss is less, and heat exchange efficiency is higher. Two groups of plate exchange combination mode are adopted, and especially the cold side of high temperature plate exchange and the cold side of low temperature plate exchange are directly connected, and there is no more connecting pipeline, and heat loss is less, and heat exchange efficiency is higher, and the equipment structure is more compact, and the area is less.

Description

Technical Field

[0001] This utility model belongs to the technical field of organic waste gas recovery devices, specifically relating to an energy recovery device for solvent recovery. Background Technology

[0002] Organic waste gas pollution has a wide range of sources, involves many industries, and is characterized by its flammability, explosiveness, toxicity, and difficulty in treatment. Currently, the mainstream treatment technologies for organic waste gas include regenerative thermal oxidation (RTO) and solvent recovery technology.

[0003] Compared with traditional RTO treatment, solvent recovery technology is not only energy-saving but also can recover a large amount of solvent. Under the premise of meeting the treatment requirements and environmental protection, it can save customers a lot of raw materials and has been increasingly recognized by the market in recent years.

[0004] However, in solvent recovery technology, energy recovery uses small-volume vertical tanks, with two independent recovery systems exchanging heat at different stages via a combined heat exchanger and a plate heat exchanger. The combined heat exchanger uses chilled water as a medium to cool the desorbed high-temperature gas by transferring the cooling capacity of the cryogenic gas. This results in low heat exchange efficiency, thus requiring a larger heat exchange area and increasing costs. The plate heat exchanger recovers heat during the desorption and regeneration stages of the two independent systems. Because the desorption stage in this system takes much longer than the regeneration stage, the plate heat exchanger has a low utilization rate and cannot fully meet the heat recovery requirements. Utility Model Content

[0005] The purpose of this invention is to provide an energy recovery device for solvent recovery, which solves the problem that the low heat exchange efficiency of the recovery system in the prior art leads to insufficient heat recovery.

[0006] The technical solution adopted in this utility model is an energy recovery device for solvent recovery, including an adsorption unit, an electric heater connected to one side of the adsorption unit, a desorption mechanism connected to the side of the electric heater away from the adsorption unit, an energy recovery unit connected to the adsorption unit, the energy recovery unit connected to the desorption mechanism, a condensation unit connected to one side of the energy recovery unit, and the adsorption unit connected to the condensation unit through a short circuit.

[0007] The features of this utility model also include: The adsorption unit includes an adsorption tank, with an exhaust gas inlet and an exhaust gas outlet on the outer wall of the adsorption tank. An activated carbon bed is connected inside the adsorption tank. One side of the adsorption tank is connected to an electric heater through a pipeline, and the outer wall of the adsorption tank is connected to an energy recovery unit through a delivery pipe.

[0008] The short loop includes a connecting pipe, one end of which is connected to the delivery pipe. The connection point between the connecting pipe and the delivery pipe is located on the left side of the energy recovery unit, and the other end of the connecting pipe is connected to the condensation unit.

[0009] The condensation unit includes a desorption precooler, which is connected to the energy recovery unit via a precooling pipe. The precooling pipe is arranged opposite to the delivery pipe. The desorption precooler is connected to the energy recovery unit via a precooling delivery pipe. On the side of the energy recovery unit opposite to the precooling delivery pipe, a desorption recooler is connected via a recooling pipe. The desorption recooler is connected to the energy recovery unit via a recooling delivery pipe.

[0010] The connecting pipe is connected to the body of the recooling pipe.

[0011] The energy recovery unit has two chambers arranged vertically inside. The inner walls of the energy recovery unit are connected to a high-temperature side plate heat exchanger and a low-temperature side plate heat exchanger, respectively. The high-temperature side plate heat exchanger is located in the lower chamber, and the low-temperature side plate heat exchanger is located in the upper chamber.

[0012] An expansion joint connects the high-temperature side plate heat exchanger and the low-temperature side plate heat exchanger, and a drain port is provided at the bottom of the energy recovery unit.

[0013] The desorption mechanism includes a desorption pipe, one end of which is connected to an energy recovery unit, and the other end of which is connected to a desorption fan. The desorption fan is connected to an electric heater through a pipe.

[0014] The beneficial effects of this utility model are: This utility model relates to an energy recovery device for solvent recovery. It uses a horizontal storage tank, which, compared to a traditional vertical storage tank, has a larger volume per tank, greater adsorption capacity, and a smaller footprint. The energy recovery device directly uses gas-to-gas heat exchange without intermediate media, resulting in less heat loss and higher heat exchange efficiency. It employs a combination of two sets of plate heat exchangers, with the cold sides of the high-temperature plate heat exchanger and the low-temperature plate heat exchanger directly connected, eliminating the need for additional connecting pipes, further reducing heat loss, increasing heat exchange efficiency, and making the equipment structure more compact and requiring less space. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the energy recovery device for solvent recovery according to this utility model; Figure 2 This is a schematic diagram of the internal structure of the energy recovery unit in the energy recovery device for solvent recovery according to this utility model.

[0016] In the diagram: 1. Adsorption tank, 11. Waste gas inlet, 12. Waste gas outlet, 13. Activated carbon bed, 14. Conveying pipe, 15. Connecting pipe, 2. Electric heater, 3. Energy recovery unit, 31. High-temperature side plate heat exchanger, 32. Low-temperature side plate heat exchanger, 4. Desorption precooler, 41. Precooling pipe, 42. Precooling conveying pipe, 5. Desorption recooler, 51. Recooling pipe, 52. Recooling conveying pipe, 6. Desorption fan, 61. Desorption pipe. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0018] This invention provides an energy recovery device for solvent recovery, such as... Figure 1 As shown, the system includes an adsorption unit, an electric heater 2 connected to one side of the adsorption unit, a desorption mechanism connected to the side of the electric heater 2 away from the adsorption unit, an energy recovery unit 3 connected to the adsorption unit, and a condensation unit connected to one side of the energy recovery unit 3. The adsorption unit is connected to the condensation unit via a short circuit. The solvent adsorbed by the adsorption unit is desorbed by high-temperature nitrogen and then enters the energy recovery unit 3. After heat exchange in the energy recovery unit 3, it enters the condensation unit. Once the solvent reaches the condensation temperature, the solvent in the gas phase is cooled down for recovery and reuse. The cooled gas re-enters the energy recovery unit 3 and exchanges heat with the desorbed gas in the energy recovery unit 3, achieving the purpose of energy recovery by exchanging heat between the high-temperature gas at the desorption front end and the gas at the desorption back end.

[0019] Example 1 An energy recovery device for solvent recovery includes an adsorption unit, an electric heater 2 connected to one side of the adsorption unit, a desorption mechanism connected to the side of the electric heater 2 away from the adsorption unit, an energy recovery unit 3 connected to the adsorption unit, the energy recovery unit 3 connected to the desorption mechanism, a condensation unit connected to one side of the energy recovery unit 3, and the adsorption unit connected to the condensation unit through a short circuit.

[0020] The adsorption unit includes an adsorption tank 1, with an exhaust gas inlet 11 and an exhaust gas outlet 12 on its outer wall. An activated carbon bed 13 is connected inside the adsorption tank 1. One side of the adsorption tank 1 is connected to an electric heater 2 via a pipeline, and the outer wall of the adsorption tank 1 is connected to an energy recovery unit 3 via a delivery pipe 14. The exhaust gas to be treated enters the activated carbon bed 13 in the adsorption tank 1 through the exhaust gas inlet 11. The organic matter in the exhaust gas is adsorbed by the activated carbon. The exhaust gas that meets the standards after adsorption by the adsorption tank 1 is discharged through the exhaust gas outlet 12. A switch is connected to the exhaust gas outlet 12 and the delivery pipe 14, and the switch is opened or closed according to actual operating requirements.

[0021] Example 2 An energy recovery device for solvent recovery includes an adsorption unit, an electric heater 2 connected to one side of the adsorption unit, a desorption mechanism connected to the side of the electric heater 2 away from the adsorption unit, an energy recovery unit 3 connected to the adsorption unit, the energy recovery unit 3 connected to the desorption mechanism, a condensation unit connected to one side of the energy recovery unit 3, and the adsorption unit connected to the condensation unit through a short circuit.

[0022] The adsorption unit includes an adsorption tank 1. The outer wall of the adsorption tank 1 is provided with an exhaust gas inlet 11 and an exhaust gas outlet 12. An activated carbon bed 13 is connected inside the adsorption tank 1. One side of the adsorption tank 1 is connected to an electric heater 2 through a pipeline. The outer wall of the adsorption tank 1 is connected to an energy recovery unit 3 through a delivery pipe 14.

[0023] The short loop includes a connecting pipe 15, one end of which is connected to a conveying pipe 14. The connection point between the connecting pipe 15 and the conveying pipe 14 is located on the left side of the energy recovery unit 3. The other end of the connecting pipe 15 is connected to the condensation unit. Inert gas is introduced into the device to purge the air inside. The electric heater 2 is then turned on to heat the inert gas. In the initial stage of heating, the moisture on the surface of the activated carbon in the adsorption tank 1 is carried out and condensed and discharged from the condensation unit after passing through the conveying pipe 14 and the connecting pipe 15.

[0024] Example 3 An energy recovery device for solvent recovery includes an adsorption unit, an electric heater 2 connected to one side of the adsorption unit, a desorption mechanism connected to the side of the electric heater 2 away from the adsorption unit, an energy recovery unit 3 connected to the adsorption unit, the energy recovery unit 3 connected to the desorption mechanism, a condensation unit connected to one side of the energy recovery unit 3, and the adsorption unit connected to the condensation unit through a short circuit.

[0025] The adsorption unit includes an adsorption tank 1. The outer wall of the adsorption tank 1 is provided with an exhaust gas inlet 11 and an exhaust gas outlet 12. An activated carbon bed 13 is connected inside the adsorption tank 1. One side of the adsorption tank 1 is connected to an electric heater 2 through a pipeline. The outer wall of the adsorption tank 1 is connected to an energy recovery unit 3 through a delivery pipe 14.

[0026] The short circuit includes a connecting pipe 15, one end of which is connected to the delivery pipe 14. The connection point between the connecting pipe 15 and the delivery pipe 14 is located on the left side of the energy recovery unit 3. The other end of the connecting pipe 15 is connected to the condensation unit.

[0027] The condensation unit includes a desorption precooler 4, which is connected to the energy recovery unit 3 via a precooling pipe 41. The precooling pipe 41 is positioned opposite to the delivery pipe 14. The desorption precooler 4 is connected to the energy recovery unit 3 via a precooling delivery pipe 42. On the side of the energy recovery unit 3 opposite to the precooling delivery pipe 42, a desorption recooler 5 is connected via a recooling pipe 51. The desorption recooler 5 is connected to the energy recovery unit 3 via a recooling delivery pipe 52. The energy recovery unit 3 has multiple ports, designated N1, N2, N3, and N4. Ports N1, N2, N3, and N4 are positioned opposite each other, as are ports N5 and N6. The conveying pipe 14 is connected to port N1, the pre-cooling pipe 41 to port N2, the pre-cooling conveying pipe 42 to port N3, the recooling pipe 51 to port N3, and the recooling conveying pipe 52 to port N5. As the temperature inside the device continuously rises, once the predetermined temperature is reached, the solvent adsorbed in the activated carbon is desorbed by a high-temperature inert gas. The desorbed high-temperature gas passes sequentially through the energy recovery unit 3, the desorption pre-cooler 4, and the desorption recooler 5, condensing the organic matter in the gas into a liquid phase for collection before entering the next stage. The condensed gas phase is then subjected to heating and desorption again, carrying away all the organic matter on the activated carbon in the adsorption tank. This stage ends. The energy recovery unit 3 in this stage can recover the waste heat from the high-temperature gas phase during the desorption process and the condensed low-temperature gas phase, achieving energy saving and consumption reduction. Both the desorption precooler 4 and the desorption recooler 5 are cooled by cooling water. The cooling water flows through the tube side and the gas phase flows through the shell side. A wire mesh demister is installed at the rear end of the desorption recooler 5 to intercept liquid droplets in the gas phase as much as possible.

[0028] Example 4 An energy recovery device for solvent recovery includes an adsorption unit, an electric heater 2 connected to one side of the adsorption unit, a desorption mechanism connected to the side of the electric heater 2 away from the adsorption unit, an energy recovery unit 3 connected to the adsorption unit, the energy recovery unit 3 connected to the desorption mechanism, a condensation unit connected to one side of the energy recovery unit 3, and the adsorption unit connected to the condensation unit through a short circuit.

[0029] The adsorption unit includes an adsorption tank 1. The outer wall of the adsorption tank 1 is provided with an exhaust gas inlet 11 and an exhaust gas outlet 12. An activated carbon bed 13 is connected inside the adsorption tank 1. One side of the adsorption tank 1 is connected to an electric heater 2 through a pipeline. The outer wall of the adsorption tank 1 is connected to an energy recovery unit 3 through a delivery pipe 14.

[0030] The short circuit includes a connecting pipe 15, one end of which is connected to the delivery pipe 14. The connection point between the connecting pipe 15 and the delivery pipe 14 is located on the left side of the energy recovery unit 3. The other end of the connecting pipe 15 is connected to the condensation unit.

[0031] The condensation unit includes a desorption precooler 4, which is connected to the energy recovery unit 3 via a precooling pipe 41. The precooling pipe 41 is arranged opposite to the delivery pipe 14. The desorption precooler 4 is connected to the energy recovery unit 3 via a precooling delivery pipe 42. On the side of the energy recovery unit 3 opposite to the precooling delivery pipe 42, a desorption recooler 5 is connected via a recooling pipe 51. The desorption recooler 5 is connected to the energy recovery unit 3 via a recooling delivery pipe 52.

[0032] The connecting pipe 15 is connected to the body of the recooling pipe 51.

[0033] like Figure 2 As shown, the energy recovery unit 3 has two chambers arranged vertically. The inner walls of the energy recovery unit 3 are connected to a high-temperature side plate heat exchanger 31 and a low-temperature side plate heat exchanger 32, respectively. The high-temperature side plate heat exchanger 31 is located in the lower chamber, and the low-temperature side plate heat exchanger 32 is located in the upper chamber. Ports N3 and N4 are located in the upper chamber, ports N1 and N2 are located in the lower chamber, port N5 is located in the upper chamber, and port N6 is located in the lower chamber. A gas passage is provided between the two chambers to facilitate gas flow.

[0034] Example 5 An energy recovery device for solvent recovery includes an adsorption unit, an electric heater 2 connected to one side of the adsorption unit, a desorption mechanism connected to the side of the electric heater 2 away from the adsorption unit, an energy recovery unit 3 connected to the adsorption unit, the energy recovery unit 3 connected to the desorption mechanism, a condensation unit connected to one side of the energy recovery unit 3, and the adsorption unit connected to the condensation unit through a short circuit.

[0035] The adsorption unit includes an adsorption tank 1. The outer wall of the adsorption tank 1 is provided with an exhaust gas inlet 11 and an exhaust gas outlet 12. An activated carbon bed 13 is connected inside the adsorption tank 1. One side of the adsorption tank 1 is connected to an electric heater 2 through a pipeline. The outer wall of the adsorption tank 1 is connected to an energy recovery unit 3 through a delivery pipe 14.

[0036] The short circuit includes a connecting pipe 15, one end of which is connected to the delivery pipe 14. The connection point between the connecting pipe 15 and the delivery pipe 14 is located on the left side of the energy recovery unit 3. The other end of the connecting pipe 15 is connected to the condensation unit.

[0037] The condensation unit includes a desorption precooler 4, which is connected to the energy recovery unit 3 via a precooling pipe 41. The precooling pipe 41 is arranged opposite to the delivery pipe 14. The desorption precooler 4 is connected to the energy recovery unit 3 via a precooling delivery pipe 42. On the side of the energy recovery unit 3 opposite to the precooling delivery pipe 42, a desorption recooler 5 is connected via a recooling pipe 51. The desorption recooler 5 is connected to the energy recovery unit 3 via a recooling delivery pipe 52.

[0038] The connecting pipe 15 is connected to the body of the recooling pipe 51.

[0039] The energy recovery unit 3 has two chambers arranged vertically inside. The inner wall of the energy recovery unit 3 is connected to a high-temperature side plate heat exchanger 31 and a low-temperature side plate heat exchanger 32, respectively. The high-temperature side plate heat exchanger 31 is located in the lower chamber, and the low-temperature side plate heat exchanger 32 is located in the upper chamber.

[0040] An expansion joint connects the high-temperature side plate heat exchanger 31 and the low-temperature side plate heat exchanger 32, and a drain port is provided at the bottom of the energy recovery unit 3. The expansion joint between the high-temperature side plate heat exchanger 31 and the low-temperature side plate heat exchanger 32 is used to absorb the thermal expansion caused by the temperature difference, preventing structural damage due to expansion. Because the heat exchanger plates are relatively thin, a plate clamping welding method is used at the connection between the heat exchanger and the shell. To prevent condensate from escaping during the operation of the energy recovery unit 3, a drain port is provided at the bottom of the energy recovery unit 3.

[0041] Example 6 An energy recovery device for solvent recovery includes an adsorption unit, an electric heater 2 connected to one side of the adsorption unit, a desorption mechanism connected to the side of the electric heater 2 away from the adsorption unit, an energy recovery unit 3 connected to the adsorption unit, the energy recovery unit 3 connected to the desorption mechanism, a condensation unit connected to one side of the energy recovery unit 3, and the adsorption unit connected to the condensation unit through a short circuit.

[0042] The adsorption unit includes an adsorption tank 1. The outer wall of the adsorption tank 1 is provided with an exhaust gas inlet 11 and an exhaust gas outlet 12. An activated carbon bed 13 is connected inside the adsorption tank 1. One side of the adsorption tank 1 is connected to an electric heater 2 through a pipeline. The outer wall of the adsorption tank 1 is connected to an energy recovery unit 3 through a delivery pipe 14.

[0043] The short circuit includes a connecting pipe 15, one end of which is connected to the delivery pipe 14. The connection point between the connecting pipe 15 and the delivery pipe 14 is located on the left side of the energy recovery unit 3. The other end of the connecting pipe 15 is connected to the condensation unit.

[0044] The condensation unit includes a desorption precooler 4, which is connected to the energy recovery unit 3 via a precooling pipe 41. The precooling pipe 41 is arranged opposite to the delivery pipe 14. The desorption precooler 4 is connected to the energy recovery unit 3 via a precooling delivery pipe 42. On the side of the energy recovery unit 3 opposite to the precooling delivery pipe 42, a desorption recooler 5 is connected via a recooling pipe 51. The desorption recooler 5 is connected to the energy recovery unit 3 via a recooling delivery pipe 52.

[0045] The connecting pipe 15 is connected to the body of the recooling pipe 51.

[0046] The energy recovery unit 3 has two chambers arranged vertically inside. The inner wall of the energy recovery unit 3 is connected to a high-temperature side plate heat exchanger 31 and a low-temperature side plate heat exchanger 32, respectively. The high-temperature side plate heat exchanger 31 is located in the lower chamber, and the low-temperature side plate heat exchanger 32 is located in the upper chamber.

[0047] An expansion joint connects the high-temperature side plate heat exchanger 31 and the low-temperature side plate heat exchanger 32, and a drain port is provided at the bottom of the energy recovery unit 3.

[0048] The desorption mechanism includes a desorption pipe 61, one end of which is connected to the energy recovery unit 3, and the other end of which is connected to a desorption fan 6. The desorption fan 6 is connected to the electric heater 2 through a pipe. An inert gas port is provided at the pipe to facilitate the passage of inert gas.

[0049] The solvent recovery process flow of the energy recovery device for solvent recovery according to this utility model is as follows: Adsorption stage: The waste gas to be treated passes through the activated carbon bed 13 in the adsorption tank 1. The organic matter in the waste gas is adsorbed by the activated carbon. The waste gas that meets the standards after adsorption in the adsorption tank 1 is discharged through the waste gas outlet 12.

[0050] Desorption stage: This stage consists of three phases: dehydration, condensation, and regeneration. In the dehydration phase, inert gas is introduced into the device through the inert gas inlet to purge the air from the system. The electric heater 2 is then turned on to heat the inert gas. Initially, moisture on the surface of the activated carbon in the adsorption tank 1 is carried away and condensed in the desorption recooler 5 via a short loop. In the condensation phase, as the temperature inside the device rises, once the predetermined temperature is reached, the solvent adsorbed in the activated carbon is desorbed by the high-temperature inert gas. The desorbed high-temperature gas passes sequentially through the energy recovery unit 3, the desorption precooler 4, and the desorption recooler 5, where the organic matter in the gas is condensed into a liquid phase and collected before proceeding to the next stage. After condensation, the gas phase is heated and desorbed again (via energy recovery unit 3, desorption fan 6 and electric heater 2) and condensed (via desorption recooler 5) to remove all the organic matter on the activated carbon in adsorption tank 1. This stage ends. The energy recovery unit 3 set in this stage can recover the waste heat of the high temperature gas phase during the desorption process and the low temperature gas phase after condensation, so as to achieve the effect of energy saving and consumption reduction. In the regeneration stage, the electric heater 2 is turned off, and the activated carbon bed 13 in adsorption tank 1 is cooled down through desorption precooler 4 and desorption recooler 5 until the bed temperature drops to the set value. The regeneration stage is completed, and it is ready to enter the adsorption stage again.

[0051] The working principle of the energy recovery device for solvent recovery in this invention is as follows: The solvent adsorbed by the adsorption tank 1 is desorbed by high-temperature nitrogen and then enters the inlet N1 of the energy recovery unit 3. After heat exchange in the high-temperature side plate heat exchanger 31 in the energy recovery unit 3, it enters the desorption precooler 4. The gas after passing through the desorption precooler 4 re-enters the inlet N3 and the low-temperature side plate heat exchanger 32 of the energy recovery unit 3. The cooled gas passes through the desorption recooler 5 and reaches the solvent condensation temperature to cool down the solvent in the gas phase for recycling. The gas after being cooled by the desorption recooler 5 re-enters the inlet N5 of the energy recovery unit 3 and exchanges heat with the desorbed gas in the energy recovery unit 3 in the low-temperature side plate heat exchanger 32 and the high-temperature side plate heat exchanger 31 in sequence. The high-temperature gas at the front end of the desorption and the gas at the back end of the desorption are heat exchanged to achieve the purpose of energy recovery.

[0052] This utility model relates to an energy recovery device for solvent recovery. It uses a horizontal storage tank, which, compared to a traditional vertical storage tank, has a larger volume per tank, greater adsorption capacity, and a smaller footprint. The energy recovery device directly uses gas-to-gas heat exchange without intermediate media, resulting in less heat loss and higher heat exchange efficiency. It employs a combination of two sets of plate heat exchangers, with the cold sides of the high-temperature plate heat exchanger and the low-temperature plate heat exchanger directly connected, eliminating the need for additional connecting pipes, further reducing heat loss, increasing heat exchange efficiency, and making the equipment structure more compact and requiring less space.

Claims

1. An energy recovery device for solvent recovery, characterized in that, The device includes an adsorption unit, an electric heater (2) connected to one side of the adsorption unit, a desorption mechanism connected to the side of the electric heater (2) away from the adsorption unit, an energy recovery unit (3) connected to the adsorption unit, the energy recovery unit (3) connected to the desorption mechanism, a condensation unit connected to one side of the energy recovery unit (3), and the adsorption unit connected to the condensation unit through a short circuit.

2. The energy recovery device for solvent recovery according to claim 1, characterized in that, The adsorption unit includes an adsorption tank (1), the outer wall of which is provided with a waste gas inlet (11) and a waste gas outlet (12), an activated carbon bed (13) is connected inside the adsorption tank (1), one side of the adsorption tank (1) is connected to an electric heater (2) through a pipeline, and the outer wall of the adsorption tank (1) is connected to an energy recovery unit (3) through a delivery pipe (14).

3. The energy recovery device for solvent recovery according to claim 1, characterized in that, The short circuit includes a connecting pipe (15), one end of which is connected to the conveying pipe (14), the connection point of which is located on the left side of the energy recovery unit (3), and the other end of which is connected to the condensation unit.

4. The energy recovery device for solvent recovery according to claim 3, characterized in that, The condensation unit includes a desorption precooler (4), which is connected to the energy recovery unit (3) via a precooling pipe (41). The precooling pipe (41) is arranged opposite to the conveying pipe (14). The desorption precooler (4) is connected to the energy recovery unit (3) via a precooling conveying pipe (42). On the side of the energy recovery unit (3) opposite to the precooling conveying pipe (42), a desorption recooler (5) is connected via a recooling pipe (51). The desorption recooler (5) is connected to the energy recovery unit (3) via a recooling conveying pipe (52).

5. The energy recovery device for solvent recovery according to claim 3, characterized in that, The connecting pipe (15) is connected to the body of the recooling pipe (51).

6. The energy recovery device for solvent recovery according to claim 4, characterized in that, The energy recovery unit (3) has two chambers arranged vertically inside. The inner wall of the energy recovery unit (3) is connected to a high-temperature side plate heat exchanger (31) and a low-temperature side plate heat exchanger (32). The high-temperature side plate heat exchanger (31) is located in the lower chamber, and the low-temperature side plate heat exchanger (32) is located in the upper chamber.

7. The energy recovery device for solvent recovery according to claim 6, characterized in that, An expansion joint is connected between the high-temperature side plate heat exchanger (31) and the low-temperature side plate heat exchanger (32), and a drain port is provided at the bottom of the energy recovery device (3).

8. The energy recovery device for solvent recovery according to claim 1, characterized in that, The desorption mechanism includes a desorption pipe (61), one end of which is connected to an energy recovery unit (3), and the other end of which is connected to a desorption fan (6). The desorption fan (6) is connected to an electric heater (2) through a pipe.

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