Waste heat recycling device for ethylene oxide rectification

Abstract

The invention belongs to the technical field of ethylene oxide devices, and particularly relates to an ethylene oxide rectification waste heat recycling device which comprises a carbon dioxide removal tower, and a carbon dioxide absorption mechanism and a steam recovery mechanism are arranged on the surface of the carbon dioxide removal tower; the carbon dioxide absorption mechanism comprises a return tank, and the action of absorbing carbon dioxide in material gas in the return tank is realized by the carbon dioxide absorption mechanism; the steam recovery mechanism comprises an evaporator, and the action that the evaporator evaporates and recovers steam on the top of the carbon dioxide removal tower is achieved through the steam recovery mechanism. According to the waste heat recycling device for ethylene oxide rectification, by arranging the steam recycling mechanism, steam at the top of the carbon dioxide removal tower is evaporated and recycled by the evaporator and then is introduced into the bottom of the carbon dioxide removal tower for steam heating; the technical problem that existing tower top material steam heat cooling consumes a large amount of circulating water and cannot be fully utilized is solved.

Description

Technical Field

[0001] The invention relates to the technical field of ethylene oxide devices, and in particular to a waste heat recovery and utilization device for ethylene oxide distillation. Background Art

[0002] Ethylene oxide is an organic chemical raw material second only to polyethylene and polyvinyl chloride among ethylene industrial derivatives. Its main downstream product is ethylene glycol, which accounts for about 70% of the total consumption of ethylene oxide. Other major downstream products of ethylene oxide include aliphatic polyoxyethylene ether surfactants, ethanolamine, polyethylene glycol and ethylene glycol ether. These derivatives can be used as chemical raw materials to produce other fine chemical products, and can also be used directly as products.

[0003] In the existing ethylene oxide production, the main heat sources of the carbon dioxide removal tower are three, one is process gas heating, one is direct steam heating, and one is steam reboiler heating. It can be seen from the amount of steam heated in the carbon dioxide removal tower that the carbon dioxide removal tower consumes a lot of energy. At the same time, the cooling of the top of the tower also requires a huge amount of cold. The heat of the top material is removed by heat exchange with the internal circulating water through the material condenser to cool the top material. The carbon dioxide removal tower requires a lot of heat, and this part of the heat of the top material is lost and not fully utilized, which makes it inconvenient to use. Summary of the invention

[0004] Based on the technical problem that existing heat cooling of tower top material steam consumes a large amount of circulating water and cannot be fully utilized, the present invention proposes a waste heat recovery and utilization device for ethylene oxide distillation.

[0005] The invention provides a waste heat recovery and utilization device for ethylene oxide distillation, comprising a carbon dioxide removal tower, the surface of which is respectively provided with a carbon dioxide absorption mechanism and a steam recovery mechanism.

[0006] The carbon dioxide absorption mechanism and the steam recovery mechanism are both located on one side of the carbon dioxide removal tower.

[0007] The carbon dioxide absorption mechanism comprises a reflux tank, and the carbon dioxide absorption mechanism realizes the action of absorbing carbon dioxide in the material gas inside the reflux tank.

[0008] The steam recovery mechanism includes an evaporator, and the steam recovery mechanism realizes the action of evaporating and recovering the steam at the top of the carbon dioxide removal tower by the evaporator.

[0009] Preferably, the carbon dioxide absorption mechanism also includes a distillation tower, the surface of the distillation tower is fixedly connected to the bottom of the carbon dioxide removal tower, the surface of the carbon dioxide removal tower is fixedly connected to a fixed bracket, the surface of the carbon dioxide removal tower is provided with a feed pipe, and the inner wall of the feed pipe is fixedly connected to the inner wall of the distillation tower.

[0010] Preferably, a material gas pipe is provided on the upper surface of the carbon dioxide removal tower, one end of the material gas pipe is fixedly connected to the material gas port at the top of the distillation tower, the reflux tank is located at the rear of the carbon dioxide removal tower, the discharge outlet at the bottom of the reflux tank is fixedly connected to an absorption pipe, one end of the absorption pipe is fixedly connected to the solution inlet of the carbon dioxide removal tower, and the other end of the material gas pipe is fixedly connected to the inner wall of the absorption pipe.

[0011] Preferably, the reflux port on the surface of the reflux tank is fixedly connected to a reflux pipe, the surface of the reflux pipe is fixedly connected to a reflux pump, one end of the reflux pipe is fixedly connected to the solution outlet of the carbon dioxide removal tower through the reflux pump, the reflux pipe is located above the absorption tube, and the inner wall of the reflux tank is fixedly connected to a discharge pipe.

[0012] Preferably, the steam recovery mechanism also includes a reboiler, which is located on one side of the carbon dioxide removal tower, and the inner wall of the carbon dioxide removal tower is fixedly connected with a first steam output pipe and a steam input pipe, and the surface of the first steam output pipe is fixedly connected with a first control valve, and the two ends of the first steam output pipe are fixedly connected with the first steam output port on the surface of the carbon dioxide removal tower and the first input port on the surface of the reboiler, respectively, and the two ends of the steam input pipe are fixedly connected with the steam input port on the surface of the carbon dioxide removal tower and the output port on the surface of the reboiler, respectively, and the first steam output pipe is located above the steam input pipe.

[0013] Preferably, the inner wall of the carbon dioxide removal tower is fixedly connected to a second steam output pipe, the surface of the second steam output pipe is fixedly connected to a second control valve, the two ends of the second steam output pipe are respectively fixedly connected to the second steam output port on the surface of the carbon dioxide removal tower and the input port on the surface of the evaporator, and the evaporator is located above the reflux tank.

[0014] Preferably, an evaporation bracket is provided below the evaporator, and the surface of the evaporation bracket is fixedly connected to the surface of the evaporator. A compression bracket is provided on one side of the evaporation bracket, and the surface of the compression bracket is fixedly connected to the first compressor. The inner wall of the evaporator is fixedly connected to an evaporation output pipe, and both ends of the evaporation output pipe are respectively fixedly connected to the output port on the surface of the evaporator and the input port on the surface of the first compressor.

[0015] Preferably, a second compressor is arranged below the compression bracket, a connecting pipe is arranged on the surface of the first compressor, both ends of the connecting pipe are fixedly connected to the output port of the surface of the first compressor and the input port of the surface of the second compressor respectively, and a supply pipe is fixedly connected to the inner wall of the second compressor.

[0016] Preferably, the inner wall of the reboiler is fixedly connected with a steam circulation pipe, the two ends of the steam circulation pipe are respectively fixedly connected with the second input port on the surface of the evaporator and the inner wall of the supply pipe, and the surface of the steam circulation pipe is fixedly connected with a regulating valve.

[0017] Preferably, a heating tube is arranged on the outside of the steam circulation tube, a battery is arranged on one side of the heating tube, a solar panel is arranged above the battery, and the battery is electrically connected to the solar panel and the heating tube respectively.

[0018] The beneficial effects of the present invention are: 1. By setting up a steam recovery mechanism, the evaporator evaporates and recovers the steam at the top of the carbon dioxide removal tower and then passes it into the bottom of the carbon dioxide removal tower for steam heating, which solves the technical problem that the existing top material steam heat cooling consumes a large amount of circulating water and cannot be fully utilized.

[0019] 2. By setting up a carbon dioxide absorption mechanism, a large amount of CO2 is produced as a by-product during the reaction of ethylene with oxygen. The material gas and the K2CO3 solution inside the reflux tank absorb the CO2 generated during the reaction of the material gas, and K2CO3 absorbs CO2 to become KHCO3 solution. The KHCO3 solution is heated by steam in the carbon dioxide removal tower, and KHCO3 is converted back into K2CO3, while releasing CO2. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of a waste heat recovery and utilization device for ethylene oxide distillation proposed by the present invention; Figure 2 A three-dimensional diagram of the reflux pipe structure of a waste heat recovery and utilization device for ethylene oxide distillation proposed by the present invention; Figure 3 A three-dimensional diagram of the material gas pipe structure of a waste heat recovery and utilization device for ethylene oxide distillation proposed by the present invention; Figure 4 This is a three-dimensional diagram of the structure of a first control valve of a waste heat recovery device for ethylene oxide distillation proposed by the present invention; Figure 5 A three-dimensional diagram of the structure of the first steam output pipe of a waste heat recovery and utilization device for ethylene oxide distillation proposed by the present invention; Figure 6A three-dimensional diagram of the steam circulation pipe structure of a waste heat recovery device for ethylene oxide distillation proposed by the present invention; Figure 7 This is a three-dimensional diagram of the structure of the second steam output pipe of a waste heat recovery device for ethylene oxide distillation proposed by the present invention.

[0021] In the figure: 1, carbon dioxide removal tower; 2, reflux tank; 3, evaporator; 201, distillation tower; 202, fixed support; 203, feed pipe; 204, material gas pipe; 205, absorption pipe; 206, reflux pipe; 207, reflux pump; 208, discharge pipe; 301, reboiler; 302, first steam output pipe; 303, steam input pipe; 304, first control valve; 305, second steam output pipe; 306, second control valve; 307, evaporation support; 308, compression support; 309, first compressor; 310, evaporation output pipe; 311, second compressor; 312, connecting pipe; 313, supply pipe; 314, steam circulation pipe; 315, regulating valve; 316, heating pipe; 317, battery; 318, solar panel. 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] Reference Figure 1-Figure 7 A waste heat recovery and utilization device for ethylene oxide distillation comprises a carbon dioxide removal tower 1, and a carbon dioxide absorption mechanism and a steam recovery mechanism are respectively arranged on the surface of the carbon dioxide removal tower 1.

[0024] The carbon dioxide absorption mechanism and the steam recovery mechanism are both located on one side of the carbon dioxide removal tower 1 .

[0025] The carbon dioxide absorption mechanism comprises a reflux tank 2 , and the carbon dioxide absorption mechanism realizes the action of absorbing carbon dioxide in the material gas inside the reflux tank 2 .

[0026] The steam recovery mechanism comprises an evaporator 3 , and the steam recovery mechanism realizes the action of evaporating and recovering the cooled steam by the evaporator 3 .

[0027] The carbon dioxide absorption mechanism also includes a distillation tower 201, the surface of the distillation tower 201 is fixedly connected to the bottom of the carbon dioxide removal tower 1, the surface of the carbon dioxide removal tower 1 is fixedly connected to a fixed bracket 202, and the surface of the carbon dioxide removal tower 1 is provided with a feed pipe 203, and the inner wall of the feed pipe 203 is fixedly connected to the inner wall of the distillation tower 201.

[0028] Furthermore, after the external raw materials enter the distillation tower 201 through the feed pipe 203 , the steam inside the carbon dioxide removal tower 1 heats the materials inside the distillation tower 201 .

[0029] A material gas pipe 204 is provided on the upper surface of the carbon dioxide removal tower 1, one end of the material gas pipe 204 is fixedly connected to the material gas port at the top of the distillation tower 201, the reflux tank 2 is located at the rear of the carbon dioxide removal tower 1, and the discharge port at the bottom of the reflux tank 2 is fixedly connected to an absorption pipe 205, one end of the absorption pipe 205 is fixedly connected to the solution inlet of the carbon dioxide removal tower 1, and the other end of the material gas pipe 204 is fixedly connected to the inner wall of the absorption pipe 205.

[0030] Furthermore, the material gas passes through the material gas pipe 204 and uses the K2CO3 solution inside the reflux tank 2 in the absorption pipe 205 to absorb the CO2 generated during the reaction. The K2CO3 absorbs CO2 to become a KHCO3 solution, and the material gas enters the interior of the reflux tank 2 through the absorption pipe 205.

[0031] The reflux port on the surface of the reflux tank 2 is fixedly connected to a reflux pipe 206, and a reflux pump 207 is fixedly connected to the surface of the reflux pipe 206. One end of the reflux pipe 206 is fixedly connected to the solution outlet of the carbon dioxide removal tower 1 through the reflux pump 207. The reflux pipe 206 is located above the absorption pipe 205, and the inner wall of the reflux tank 2 is fixedly connected to a discharge pipe 208.

[0032] Furthermore, by steam heating, KHCO3 inside the carbon dioxide removal tower 1 is converted back into K2CO3, and CO2 is released at the same time. The reflux pump 207 pumps K2CO3 into the reflux tank 2 through the reflux pipe 206, and the material gas inside the reflux tank 2 is discharged through the discharge pipe 208.

[0033] By setting up a carbon dioxide absorption mechanism, a large amount of CO2 is produced as a by-product during the reaction of ethylene with oxygen. The material gas and the K2CO3 solution inside the reflux tank 2 absorb the CO2 generated during the reaction of the material gas, and K2CO3 absorbs CO2 to become KHCO3 solution. The KHCO3 solution is heated by steam in the T220 tower, and KHCO3 is converted back into K2CO3, while releasing CO2.

[0034] The steam recovery mechanism also includes a reboiler 301, which is located on one side of the carbon dioxide removal tower 1. The inner wall of the carbon dioxide removal tower 1 is fixedly connected with a first steam output pipe 302 and a steam input pipe 303, and the surface of the first steam output pipe 302 is fixedly connected with a first control valve 304. The two ends of the first steam output pipe 302 are fixedly connected with the first steam output port on the surface of the carbon dioxide removal tower 1 and the first input port on the surface of the reboiler 301, respectively. The two ends of the steam input pipe 303 are fixedly connected with the steam input port on the surface of the carbon dioxide removal tower 1 and the output port on the surface of the reboiler 301, respectively. The first steam output pipe 302 is located above the steam input pipe 303.

[0035] Furthermore, the steam at the top of the carbon dioxide removal tower 1 enters the interior of the reboiler 301 through the first steam output pipe 302 to be heated, and then enters the bottom of the carbon dioxide removal tower 1 through the steam input pipe 303 .

[0036] The inner wall of the carbon dioxide removal tower 1 is fixedly connected to a second steam output pipe 305, the surface of the second steam output pipe 305 is fixedly connected to a second control valve 306, and both ends of the second steam output pipe 305 are respectively fixedly connected to the second steam output port on the surface of the carbon dioxide removal tower 1 and the input port on the surface of the evaporator 3, and the evaporator 3 is located above the reflux tank 2.

[0037] Furthermore, the steam at the top of the carbon dioxide removal tower 1 enters the interior of the evaporator 3 through the second steam output pipe 305 for recycling.

[0038] An evaporator bracket 307 is provided below the evaporator 3, and the surface of the evaporator bracket 307 is fixedly connected to the surface of the evaporator 3. A compression bracket 308 is provided on one side of the evaporator bracket 307, and the surface of the compression bracket 308 is fixedly connected to the first compressor 309. The inner wall of the evaporator 3 is fixedly connected to an evaporator output pipe 310, and the two ends of the evaporator output pipe 310 are respectively fixedly connected to the output port on the surface of the evaporator 3 and the input port on the surface of the first compressor 309.

[0039] Furthermore, the low-temperature steam is converted into low-pressure steam through the evaporator 3 and then enters the interior of the first compressor 309 through the evaporation output pipe 310 to be pressurized and heated.

[0040] A second compressor 311 is arranged below the compression bracket 308, and a connecting pipe 312 is arranged on the surface of the first compressor 309. The two ends of the connecting pipe 312 are fixedly connected to the output port on the surface of the first compressor 309 and the input port on the surface of the second compressor 311 respectively, and a supply pipe 313 is fixedly connected to the inner wall of the second compressor 311.

[0041] Furthermore, the second compressor 311 pressurizes and heats the steam again and supplies heat to the outside through the supply pipe 313 .

[0042] The inner wall of the reboiler 301 is fixedly connected with a steam circulation pipe 314 , and the two ends of the steam circulation pipe 314 are respectively fixedly connected with the second input port on the surface of the evaporator 3 and the inner wall of the supply pipe 313 . The surface of the steam circulation pipe 314 is fixedly connected with a regulating valve 315 .

[0043] Furthermore, the steam after heat supply returns to the interior of the reboiler 301 through the steam circulation pipe 314 to be reboiled and then heats the bottom of the carbon dioxide removal tower 1 .

[0044] A heating pipe 316 is disposed outside the steam circulation pipe 314 , a battery 317 is disposed on one side of the heating pipe 316 , a solar panel 318 is disposed above the battery 317 , and the battery 317 is electrically connected to the solar panel 318 and the heating pipe 316 , respectively.

[0045] Furthermore, when the heated steam passes through the steam circulation pipe 314 , the solar panel 318 absorbs solar energy and converts it into electrical energy to supplement the heat of the steam inside the steam circulation pipe 314 , thereby reducing the energy consumption of the reboiler 301 .

[0046] By setting up a steam recovery mechanism, the evaporator 3 evaporates and recovers the steam at the top of the carbon dioxide removal tower 1 and then introduces it into the bottom of the carbon dioxide removal tower 1 for steam heating, thereby solving the technical problem that the existing top material steam heat cooling consumes a large amount of circulating water and cannot be fully utilized.

[0047] Working principle: Before use, the distillation raw material enters the interior of the distillation tower 201 through the feed pipe 203. In the process of the reaction of ethylene with oxygen in the device, a large amount of CO2 is produced as a by-product. In order to prevent excessive accumulation of CO2 in the reactor and affect the normal reaction, the material gas at the top of the distillation tower 201 passes through the material gas pipe 204 and reacts with the K2CO3 solution in the reflux tank 2 in the absorption pipe 205 to absorb the CO2 in the material gas. The material gas is discharged through the discharge pipe 208 arranged above the reflux tank 2. K2CO3 absorbs CO2 to become KHCO3 solution. The KHCO3 solution enters the absorption pipe 205 through the absorption pipe 205. The bottom of the carbon dioxide removal tower 1 is recovered by steam heating, and KHCO3 is converted into K2CO3 again while releasing CO2. The reflux pump 207 pumps the K2CO3 at the bottom of the carbon dioxide removal tower 1 into the interior of the reflux tank 2 through the reflux pipe 206. The top of the carbon dioxide removal tower 1 is mainly water vapor and CO2. The first control valve 304 fixedly connected to the surface of the first steam output pipe 302 is opened. The steam at the top of the carbon dioxide removal tower 1 enters the interior of the reboiler 301 through the first steam output pipe 302 for heating and then enters the carbon dioxide through the steam input pipe 303. The bottom of the removal tower 1 is recycled, and the steam at the top of the carbon dioxide removal tower 1 enters the interior of the evaporator 3 through the second steam output pipe 305 for recycling, or the second control valve 306 fixedly connected to the surface of the second steam output pipe 305 is opened to switch the steam circulation channel, and the low-temperature steam at the top of the carbon dioxide removal tower 1 enters the interior of the evaporator 3 from the second steam output pipe 305, and the low-pressure steam generated by the evaporator 3 enters the first compressor 309 and the second compressor 311 from the steam output pipe in sequence, and is compressed by the first compressor 309 and the second compressor 311. After increasing the temperature and pressure of the steam, it is heated to the outside through the supply pipe 313. The heated steam enters the interior of the reboiler 301 through the steam circulation pipe 314 for heating. The high-temperature steam enters the bottom of the carbon dioxide removal tower 1 through the steam input pipe 303 to complete the recycling. A heating pipe 316 is arranged on the outside of the steam circulation pipe 314. The solar energy is absorbed by the solar cell panel 318 and converted into electrical energy and stored in the battery 317. The battery 317 supplements the heat of the steam in the steam circulation pipe 314 through the heating pipe 316, thereby reducing the energy consumption of the reboiler 301.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A waste heat recovery device for ethylene oxide distillation, comprising a carbon dioxide removal tower (1), characterized in that: The surface of the carbon dioxide removal tower (1) is provided with a carbon dioxide absorption mechanism and a steam recovery mechanism; The carbon dioxide absorption mechanism and the steam recovery mechanism are both located on one side of the carbon dioxide removal tower (1); The carbon dioxide absorption mechanism comprises a reflux tank (2), and the carbon dioxide absorption mechanism realizes the action of absorbing carbon dioxide in the material gas inside the reflux tank (2); The steam recovery mechanism comprises an evaporator (3), and the steam recovery mechanism enables the evaporator (3) to evaporate and recover the steam at the top of the carbon dioxide removal tower (1).

2. The waste heat recovery and utilization device for ethylene oxide distillation according to claim 1, characterized in that: The carbon dioxide absorption mechanism further comprises a distillation tower (201), the surface of the distillation tower (201) being fixedly connected to the bottom of the carbon dioxide removal tower (1), the surface of the carbon dioxide removal tower (1) being fixedly connected to a fixed bracket (202), the surface of the carbon dioxide removal tower (1) being provided with a feed pipe (203), the inner wall of the feed pipe (203) being fixedly connected to the inner wall of the distillation tower (201).

3. The waste heat recovery and utilization device for ethylene oxide distillation according to claim 2, characterized in that: A material gas pipe (204) is provided on the upper surface of the carbon dioxide removal tower (1), one end of the material gas pipe (204) is fixedly connected to the material gas port at the top of the distillation tower (201), the reflux tank (2) is located at the rear of the carbon dioxide removal tower (1), the discharge port at the bottom of the reflux tank (2) is fixedly connected to an absorption pipe (205), one end of the absorption pipe (205) is fixedly connected to the solution inlet of the carbon dioxide removal tower (1), and the other end of the material gas pipe (204) is fixedly connected to the inner wall of the absorption pipe (205).

4. The waste heat recovery and utilization device for ethylene oxide distillation according to claim 3, characterized in that: The reflux port on the surface of the reflux tank (2) is fixedly connected to a reflux pipe (206), the surface of the reflux pipe (206) is fixedly connected to a reflux pump (207), one end of the reflux pipe (206) is fixedly connected to the solution outlet of the carbon dioxide removal tower (1) through the reflux pump (207), the reflux pipe (206) is located above the absorption pipe (205), and the inner wall of the reflux tank (2) is fixedly connected to a discharge pipe (208).

5. The waste heat recovery and utilization device for ethylene oxide distillation according to claim 1, characterized in that: The steam recovery mechanism further comprises a reboiler (301), wherein the reboiler (301) is located at one side of the carbon dioxide removal tower (1), and the inner wall of the carbon dioxide removal tower (1) is fixedly connected with a first steam output pipe (302) and a steam input pipe (303), and the surface of the first steam output pipe (302) is fixedly connected with a first control valve (304), and the two ends of the first steam output pipe (302) are fixedly connected with a first steam output port on the surface of the carbon dioxide removal tower (1) and a first input port on the surface of the reboiler (301), respectively, and the two ends of the steam input pipe (303) are fixedly connected with a steam input port on the surface of the carbon dioxide removal tower (1) and an output port on the surface of the reboiler (301), respectively, and the first steam output pipe (302) is located above the steam input pipe (303).

6. The waste heat recovery and utilization device for ethylene oxide distillation according to claim 5, characterized in that: The inner wall of the carbon dioxide removal tower (1) is fixedly connected to a second steam output pipe (305), the surface of the second steam output pipe (305) is fixedly connected to a second control valve (306), and both ends of the second steam output pipe (305) are respectively fixedly connected to a second steam output port on the surface of the carbon dioxide removal tower (1) and an input port on the surface of the evaporator (3), and the evaporator (3) is located above the reflux tank (2).

7. The waste heat recovery and utilization device for ethylene oxide distillation according to claim 6, characterized in that: An evaporation bracket (307) is arranged below the evaporator (3), the surface of the evaporation bracket (307) is fixedly connected to the surface of the evaporator (3), a compression bracket (308) is arranged on one side of the evaporation bracket (307), the surface of the compression bracket (308) is fixedly connected to a first compressor (309), an evaporation output pipe (310) is fixedly connected to the inner wall of the evaporator (3), and two ends of the evaporation output pipe (310) are respectively fixedly connected to an output port on the surface of the evaporator (3) and an input port on the surface of the first compressor (309).

8. The waste heat recovery and utilization device for ethylene oxide distillation according to claim 7, characterized in that: A second compressor (311) is arranged below the compression bracket (308), a connecting pipe (312) is arranged on the surface of the first compressor (309), two ends of the connecting pipe (312) are respectively fixedly connected to an output port on the surface of the first compressor (309) and an input port on the surface of the second compressor (311), and a supply pipe (313) is fixedly connected to the inner wall of the second compressor (311).

9. The waste heat recovery device for ethylene oxide distillation according to claim 8, characterized in that: The inner wall of the reboiler (301) is fixedly connected to a steam circulation pipe (314), and two ends of the steam circulation pipe (314) are respectively fixedly connected to a second input port on the surface of the evaporator (3) and the inner wall of the supply pipe (313), and the surface of the steam circulation pipe (314) is fixedly connected to a regulating valve (315).

10. The waste heat recovery and utilization device for ethylene oxide distillation according to claim 9, characterized in that: A heating pipe (316) is arranged outside the steam circulation pipe (314), a storage battery (317) is arranged on one side of the heating pipe (316), a solar panel (318) is arranged above the storage battery (317), and the storage battery (317) is electrically connected to the solar panel (318) and the heating pipe (316), respectively.

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