Ethylene oxide aqueous solution treatment device

Abstract

The invention discloses an ethylene oxide aqueous solution treatment device, and belongs to the technical field of chemical production, the ethylene oxide aqueous solution treatment device comprises a light component removal tower a, a light component removal tower b, an ethylene oxide refining tower a and an ethylene oxide refining tower b, the light component removal tower b is communicated with a circulating pump through a pipeline, and the circulating pump is communicated with an ethylene oxide aqueous solution conveying pipeline a through a pipeline; the connecting pipeline is sequentially provided with a gate valve a and an electromagnetic valve b, the circulating pump is communicated with the ethylene oxide aqueous solution conveying pipeline b through a pipeline, the connecting pipeline is sequentially provided with a gate valve b and an electromagnetic valve d, and the ethylene oxide aqueous solution conveying pipeline a is communicated with the ethylene oxide aqueous solution conveying pipeline b through a pipeline; the ethylene oxide and ethylene glycol product elastic switching technology of an epoxy device is achieved, meanwhile, the technical problem of a long-distance ethylene oxide water solution conveying pipeline is solved, and the device is mainly applied to ethylene oxide water solution treatment.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to an ethylene oxide aqueous solution treatment device. Background Art

[0002] Ethylene oxide plays an important role in chemical production and has a certain demand in various industries. With the rapid development of industry, the total market size of ethylene oxide is constantly rising. The higher the output of ethylene oxide, the lower the energy consumption. The total production volume of enterprises can basically meet the material supply needs of various industries in my country. Ethylene oxide is a simple cyclic ether with active chemical properties, flammable and explosive, and easily soluble in a variety of organic solvents. It is widely used in washing, pharmaceutical, sterilization, printing and dyeing and other industries; it is not easy to transport over long distances, so it has a strong regionality. In order to adjust the production capacity structure of ethylene oxide products, this project can transport ethylene oxide aqueous solution over long distances to any set of equipment for production, thereby improving the flexibility of the product structure. With changes in the sales market, in order to achieve a balance between production and sales and maximize the economic benefits of the device, the implementation of this project can adjust the production capacity structure of the device, thereby improving the overall economic benefits.

[0003] 201510890708.3 discloses a closed and continuous ethylene oxide delivery system and method, the method being as follows: the low-temperature ethylene oxide in the tank in the tank area is boosted to a set pressure by an ethylene oxide delivery pump, and then enters the ethylene oxide delivery cooler. After the ethylene oxide is cooled to a lower temperature by the cooler, it enters the ethylene oxide delivery main line, and is directly delivered to each user's storage tank through a branch line connected to the main line. The excess ethylene oxide product is cooled by an ethylene oxide recovery cooler and then returned to the tank in the tank area. The innovation of the present invention lies in the proposal of a closed and continuous method for simultaneous multi-point delivery of ethylene oxide, which not only improves the delivery capacity of ethylene oxide products, but also avoids the safety risks caused by frequent loading and unloading and the restrictions of temperature on the transportation of ethylene oxide. The pipeline of the invention is provided with pressure monitoring and nitrogen purge facilities to avoid ethylene oxide residues and local pressure abnormalities. The above method is for the transportation of pure ethylene oxide liquid, while this patent mainly solves the problem of long-distance transportation of ethylene oxide aqueous solution to another set of equipment for producing ethylene oxide, thereby increasing the production of ethylene oxide. The device mainly reduces the risk of long-distance transportation of ethylene oxide aqueous solution, increases the production of ethylene oxide while reducing the production of ethylene glycol, thereby reducing the overall steam energy consumption of the device, can have certain economic benefits, can achieve a balance between production and sales and market conditions, thereby achieving the purpose of adjusting the production capacity structure. Summary of the invention

[0004] In order to solve the technical problems raised in the background technology, this design provides an ethylene oxide aqueous solution treatment device, and the technical solution adopted is as follows:

[0005] An ethylene oxide aqueous solution treatment device, characterized in that it comprises a light component removal tower a, a light component removal tower b, a circulating pump a, a circulating pump b, a circulating pump c and an ethylene oxide refining tower b, the circulating pump a is connected with the light component removal tower a through a pipeline, and the tower kettle of the light component removal tower a is provided with a liquid level gauge a, a thermometer a and a reboiler a;

[0006] The circulating pump b18 is connected to the light component removal tower b through a pipeline. The tower kettle of the light component removal tower b is provided with a liquid level gauge b, a thermometer b and a reboiler b;

[0007] The ethylene oxide refining tower b is connected to the circulation pump d, the flow meter g, the flow control valve g and the solenoid valve g through the pipeline;

[0008] The lower part of the ethylene oxide refining tower b is provided with a reboiler c, a reboiler d, a liquid level gauge c and a thermometer c;

[0009] The top of the ethylene oxide refining tower b is connected to the reflux tank through a pipeline, and the connected pipeline is provided with a cooler a, a cooler b and a thermometer d;

[0010] The lower part of the reflux tank is connected through a circulation pump e, and the circulation pump e is connected to the top of the ethylene oxide refining tower b through a pipeline. The connected pipeline is provided with a solenoid valve h, a flow meter i and a flow control valve i;

[0011] The ethylene oxide refining tower b is connected to the cooler c through a pipeline, the cooler c is connected to the circulation pump f through a pipeline, and the circulation pump f is connected to the flow meter h and the flow control valve h through a pipeline;

[0012] The ethylene oxide refining tower a is connected to the circulation pump c through a pipeline, and the connected pipeline is provided with a solenoid valve f33, a flow meter f and a flow control valve f in sequence;

[0013] The circulating pump b and the circulating pump c are connected by a pipeline, and a thermometer f, a flow meter e, a flow control valve e, a solenoid valve e and a thermometer g are arranged on the connected pipeline;

[0014] The reflux tank is also provided with a pressure gauge b, a pressure control valve a and a pressure control valve b.

[0015] Preferably: the circulating pump a is connected to the solenoid valve a, the flow meter a, the flow control valve a, the flow meter b, the flow control valve b, the gate valve a, the solenoid valve d, the gate valve c and the thermometer e through a pipeline.

[0016] Preferably: the circulation pump b is connected to the solenoid valve c, the flow meter c, the flow control valve c, the flow meter d, the flow control valve d, the gate valve b and the solenoid valve d through a pipeline.

[0017] Preferably: a gate valve d is provided between the solenoid valve d and the thermometer f.

[0018] Preferably, the heat source used by the light component removal tower a and the light component removal tower b is the waste heat of the lean absorption liquid, and the temperature is 60°C-65°C.

[0019] Preferably: the heat source used in the reboiler of the ethylene oxide refining tower b is 0.6Mpag steam with a temperature of 150°C-170°C.

[0020] Preferably: the pressure control valve at the top of the reflux tank adopts split-range control, the pressure gauge controls the pressure control valve a and the pressure control valve b, and the pressure is controlled at 0.2-0.3Mpag.

[0021] Preferably: three pipelines are set at the outlet of the circulating pump a of the light component removal tower a, which are respectively sent to the ethylene oxide refining tower b, the EG hydration reactor, and the inlet of the circulating pump b of the ethylene oxide refining tower a. The pipelines are ethylene oxide aqueous solution delivery pipelines. The length of the ethylene oxide aqueous solution delivery pipeline a is about 200m; the length of the ethylene oxide aqueous solution delivery pipeline b is about 80m; the length of the ethylene oxide aqueous solution delivery pipeline c is about 1000m, wherein the flow rate of the ethylene oxide aqueous solution is <2m / s.

[0022] The ethylene oxide aqueous solution delivery pipeline a is provided with a gate valve c, which serves as a flushing and purge valve for emptying and replacing the pipeline. The ethylene oxide aqueous solution delivery pipeline b is provided with a gate valve d, which serves as a flushing and purge valve for emptying and replacing the pipeline.

[0023] The ethylene oxide aqueous solution delivery pipeline a is provided with a thermometer e. If the temperature rises higher than the light component removal tower a kettle thermometer a by 5 to 10°C, the pipeline delivery can be stopped immediately to prevent hydrolysis and heat release during the delivery of the ethylene oxide aqueous solution.

[0024] The ethylene oxide aqueous solution delivery pipeline b is provided with a thermometer f. If the temperature rises higher than the light component removal tower b kettle thermometer b5-10°C, the pipeline delivery can be stopped immediately to prevent hydrolysis and heat release during the delivery of the ethylene oxide aqueous solution.

[0025] The reboiler of the ethylene oxide refining tower b uses 0.6Mpag steam as a heat source with a temperature of about 160°C.

[0026] The pressure control valve at the top of the reflux tank adopts split-range control, and the pressure gauge controls the pressure control valve a and the pressure control valve b, and the pressure is controlled at 0.2-0.3Mpag.

[0027] The ethylene oxide concentration in the ethylene oxide aqueous solution of the present invention is about 76.8%, and the water content is about 23%.

[0028] The beneficial effect of the present invention is that by adopting the design of the present invention, the purpose of increasing the output of ethylene oxide can be achieved by safely transporting the ethylene oxide aqueous solution to another set of equipment, reducing the production energy consumption of the equipment in the actual production process, improving the economic benefits of the equipment, and achieving a balance between production and sales. Under the condition of ensuring that the existing equipment is not expanded, the present invention increases the output of ethylene oxide from 872,000 tons / year to 1 million tons / year, and can produce about 128,000 tons / year more ethylene oxide per year. The marginal profit of adding ethylene oxide is 100 yuan / ton, and the economic benefit of one year can be as high as 12.8 million yuan. If the marginal profit of ethylene oxide is higher, the overall economic benefit is very considerable. The design of the present invention is the first of its kind in the industry, and has achieved high economic benefits in actual application. Moreover, the entire equipment is very convenient to use and is suitable for comprehensive promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention is a working principle diagram of an ethylene oxide aqueous solution treatment device.

[0030] In the figure: 1 gate valve d, 2 light component removal tower a, 3 liquid level meter a, 4 thermometer a, 5 circulating pump a, 6 solenoid valve a, 7 flow meter a, 8 flow control valve a, 9 flow meter b, 10 flow control valve b, 11 gate valve a, 12 solenoid valve b, 13 reboiler a, 14 gate valve c, 15 light component removal tower b, 16 liquid level meter b, 17 thermometer b, 18 circulating pump b, 19 solenoid valve c, 20 flow meter c, 21 flow control valve c, 22 flow meter d, 23 flow control valve d, 24 gate valve b, 25 solenoid valve d, 26 ethylene oxide aqueous solution delivery pipeline a, 27 ethylene oxide aqueous solution delivery pipeline b, 28 flow meter e, 29 flow control valve e, 30 solenoid valve e, 31 circulating pump c, 32 ethylene oxide refining tower a, 33 solenoid valve f, 34 flowmeter f, 35 flow control valve f, 36 ethylene oxide refining tower b, 37 reboiler b, 38 reboiler c, 39 liquid level meter c, 40 thermometer c, 41 circulating pump d, 42 flowmeter g, 43 flow control valve g, 44 solenoid valve g, 45 pressure gauge a, 46 cooler c, 47 circulating pump f, 48 flowmeter h, 49 flow control valve h, 50 cooler a, 51 cooler b, 52 reflux tank, 53 pressure gauge b, 54 pressure control valve a, 55 pressure control valve b, 56 reflux pump, 57 reboiler b, 58 thermometer d, 59 liquid level meter d, 60 solenoid valve h, 61 flowmeter i, 62 flow control valve i, 63 ethylene oxide aqueous solution delivery pipeline c, 64 thermometer e, 65 thermometer f, 66 thermometer g. DETAILED DESCRIPTION

[0031] Example 1

[0032] like Figure 1 As shown:

[0033] An ethylene oxide aqueous solution processing device comprises a light component removal tower a2, a light component removal tower b15, a circulating pump a5, an ethylene oxide aqueous solution delivery pipeline a26, a circulating pump b18, an ethylene oxide aqueous solution delivery pipeline b27, an ethylene oxide aqueous solution delivery pipeline c63, a circulating pump c31 and an ethylene oxide refining tower b36, wherein the circulating pump a5 is connected to the ethylene oxide aqueous solution delivery pipeline a26 through a pipeline, and the connected pipelines are provided with a gate valve a11, a solenoid valve b12 and a gate valve c14 in sequence, and the circulating pump b18 is connected to the ethylene oxide aqueous solution delivery pipeline b27 through a pipeline, and the connected pipelines are provided with a gate valve b24, a solenoid valve d25 and a gate valve d 1. The ethylene oxide aqueous solution delivery pipeline a26 is connected to the ethylene oxide aqueous solution delivery pipeline b27 through a pipeline. The ethylene oxide aqueous solution delivery pipeline a26 and the ethylene oxide aqueous solution delivery pipeline b27 are connected to the ethylene oxide aqueous solution delivery pipeline c63 after being merged through a pipeline. The ethylene oxide aqueous solution delivery pipeline c63 is connected to the circulation pump c31 through a pipeline. The connected pipelines are sequentially provided with a flow meter e28, a flow control valve e29, a solenoid valve e30 and a thermometer g66. The circulation pump c31 is connected to the ethylene oxide refining tower b36 through a pipeline. The connected pipelines are sequentially provided with a solenoid valve f33, a flow meter f34 and a flow control valve f35;

[0034] The tower kettle of the light component removal tower a2 is provided with a liquid level gauge a3, a thermometer a4 and a reboiler a13, and the reboiler a13 uses the waste heat of the lean absorption liquid as a heat source;

[0035] The outlet of the circulating pump a5 is provided with three pipelines, which are respectively sent to the ethylene oxide refining tower b36, the EG hydration reactor, and the inlet of the circulating pump c, which is the ethylene oxide aqueous solution delivery pipeline a26;

[0036] The light component removal tower b15 is equipped with a level gauge b16, a thermometer b17, and a reboiler b57. The reboiler b57 uses the waste heat of the lean liquid as a heat source.

[0037] The outlet of the light component removal tower b15 is provided with three pipelines, which are respectively sent to the ethylene oxide refining tower b, the EG hydration reactor, and the circulation pump c31 inlet of the epoxy refining tower a32. The pipeline is the ethylene oxide aqueous solution delivery pipeline b27, which merges with the pipeline a26 for the ethylene oxide aqueous solution delivery pipeline and then is sent to the circulation pump c31 inlet of the epoxy refining tower a32, and then sent to the ethylene oxide refining tower b36;

[0038] The ethylene oxide aqueous solution delivery pipeline a26 is provided with a gate valve a11, a solenoid valve b12, a gate valve c14 and a thermometer e64 in sequence;

[0039] The ethylene oxide aqueous solution delivery pipeline b27 is provided with a gate valve b11, a solenoid valve d12, a gate valve d1 and a thermometer f65 in sequence;

[0040] The ethylene oxide aqueous solution delivery pipeline c63 is provided with a flow meter e28, a flow control valve e29, a solenoid valve e30 and a thermometer g66 in sequence;

[0041] When the marginal benefit of ethylene oxide decreases, the device reduces the output of ethylene oxide, and it is necessary to stop the ethylene oxide aqueous solution delivery pipeline a, the ethylene oxide aqueous solution delivery pipeline b27 and the ethylene oxide aqueous solution delivery pipeline c63. After the pipeline is stopped, it is necessary to purge and replace it. The pipeline is flushed by closing the gate valve a11, closing the solenoid valve b12, and connecting the gate valve c14 to the DMW desalted water. After a long period of flushing, low-pressure nitrogen is introduced for purging to purge and replace the entire pipeline.

[0042] Similarly, when purging and replacing the ethylene oxide aqueous solution delivery pipeline b27, the gate valve b24 is closed, the solenoid valve d25 is closed, and the gate valve d1 is connected to the DMW desalted water to flush the pipeline. After a long period of flushing, low-pressure nitrogen is introduced for purging to purge and replace the entire pipeline. At this time, the ethylene oxide aqueous solution delivery pipeline c63 is also purged and replaced for the next use.

[0043] Example 2

[0044] like Figure 1 As shown:

[0045] An ethylene oxide aqueous solution processing device comprises a light component removal tower a2, a light component removal tower b15, a circulating pump a5, an ethylene oxide aqueous solution delivery pipeline a26, a circulating pump b18, an ethylene oxide aqueous solution delivery pipeline b27, an ethylene oxide aqueous solution delivery pipeline c63, a circulating pump c31 and an ethylene oxide refining tower b36, wherein the circulating pump a5 is connected to the ethylene oxide aqueous solution delivery pipeline a26 through a pipeline, and the connected pipelines are provided with a gate valve a11, a solenoid valve b12 and a gate valve c14 in sequence, and the circulating pump b18 is connected to the ethylene oxide aqueous solution delivery pipeline b27 through a pipeline, and the connected pipelines are provided with a gate valve b24, a solenoid valve d25 and a gate valve d 1. The ethylene oxide aqueous solution delivery pipeline a26 is connected to the ethylene oxide aqueous solution delivery pipeline b27 through a pipeline. The ethylene oxide aqueous solution delivery pipeline a26 and the ethylene oxide aqueous solution delivery pipeline b27 are connected to the ethylene oxide aqueous solution delivery pipeline c63 after being merged through a pipeline. The ethylene oxide aqueous solution delivery pipeline c63 is connected to the circulation pump c31 through a pipeline. The connected pipelines are sequentially provided with a flow meter e28, a flow control valve e29, a solenoid valve e30 and a thermometer g66. The circulation pump c31 is connected to the ethylene oxide refining tower b36 through a pipeline. The connected pipelines are sequentially provided with a solenoid valve f33, a flow meter f34 and a flow control valve f35;

[0046] The tower kettle of the light component removal tower a2 is provided with a liquid level gauge a3, a thermometer a4 and a reboiler a13, and the reboiler a13 uses the waste heat of the lean absorption liquid as a heat source;

[0047] The outlet of the circulating pump a5 is provided with three pipelines, which are respectively sent to the ethylene oxide refining tower b36, the EG hydration reactor, and the inlet of the circulating pump c, which is the ethylene oxide aqueous solution delivery pipeline a26;

[0048] The light component removal tower b15 is equipped with a level gauge b16, a thermometer b17, and a reboiler b57. The reboiler b57 uses the waste heat of the lean liquid as a heat source.

[0049] The outlet of the light component removal tower b15 is provided with three pipelines, which are respectively sent to the ethylene oxide refining tower b, the EG hydration reactor, and the circulation pump c31 inlet of the epoxy refining tower a32. The pipeline is the ethylene oxide aqueous solution delivery pipeline b27, which merges with the pipeline a26 for the ethylene oxide aqueous solution delivery pipeline and then is sent to the circulation pump c31 inlet of the epoxy refining tower a32, and then sent to the ethylene oxide refining tower b36;

[0050] The ethylene oxide aqueous solution delivery pipeline a26 is provided with a gate valve a11, a solenoid valve b12, a gate valve c14 and a thermometer e64 in sequence;

[0051] The ethylene oxide aqueous solution delivery pipeline b27 is provided with a gate valve b11, a solenoid valve d12, a gate valve d1 and a thermometer f65 in sequence;

[0052] The ethylene oxide aqueous solution delivery pipeline c63 is provided with a flow meter e28, a flow control valve e29, a solenoid valve e30 and a thermometer g66 in sequence;

[0053] The top of the ethylene oxide refining tower b6 is provided with a side line for producing ethylene oxide products. The side line is provided with a cooler c46 and a circulating pump e47 in sequence. The outlet of the circulating pump e47 is provided with a flow meter h48 and a flow control valve h49.

[0054] A reflux tank 52 is provided at the top of the ethylene oxide refining tower b, and a cooler a50 and a cooler b51 are provided in sequence in the pipeline entering the reflux tank 52, and a thermometer d58 is provided at the outlet of the cooler b51;

[0055] The reflux tank 52 is provided with a liquid level gauge d59 and a pressure gauge b53, and the top of the reflux tank 52 is provided with a pressure control valve a54 and a pressure control valve b55;

[0056] The heat source used by the light component removal tower a2 is the waste heat of the lean absorption liquid, with a temperature of 60°C to 65°C.

[0057] The heat source used by the light component removal tower b15 is the waste heat of the lean absorption liquid, with a temperature of 60℃~65℃.

[0058] The length of the ethylene oxide aqueous solution delivery pipeline a26 is about 200m; the length of the ethylene oxide aqueous solution delivery pipeline b27 is about 80m; and the length of the ethylene oxide aqueous solution delivery pipeline c63 is about 1000m.

[0059] The ethylene oxide aqueous solution delivery pipeline a26 is provided with a gate valve c14, which serves as a flushing and purge valve for emptying and replacing the pipeline. The ethylene oxide aqueous solution delivery pipeline b27 is provided with a gate valve d1, which serves as a flushing and purge valve for emptying and replacing the pipeline.

[0060] The ethylene oxide aqueous solution delivery pipeline a26 is equipped with a thermometer e64. If the temperature rises 5-10°C higher than the value of the thermometer a4, the pipeline delivery can be stopped immediately to prevent the ethylene oxide aqueous solution from hydrolyzing and releasing heat during the delivery process.

[0061] The ethylene oxide aqueous solution delivery pipeline b27 is equipped with a thermometer f65. If the temperature rises 5-10°C higher than the value of the thermometer b17, the pipeline delivery can be stopped immediately to prevent hydrolysis and heat release during the delivery of the ethylene oxide aqueous solution.

[0062] The reboiler b37 and reboiler c38 of the ethylene oxide refining tower b36 use a heat source of 0.6Mpag steam with a temperature of about 160°C.

[0063] The pressure control valve at the top of the reflux tank 52 adopts split-range control, and the pressure gauge controls the pressure control valve a54 and the pressure control valve b55, and the pressure is controlled at 0.2-0.3Mpag.

[0064] When the actual value of pressure gauge B53 is higher than the set value, pressure control valve B55 is gradually closed until it is closed. If the actual pressure value is still higher than the set value, pressure control valve A54 is slowly opened to release pressure. When the actual value of pressure gauge B53 is lower than the set value, pressure control valve A54 is slowly closed until it is closed. If the actual pressure value is still lower than the set value, pressure control valve B55 is slowly opened.

[0065] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention. These improvements should also be regarded as within the scope of protection of the present invention.

Claims

1. An ethylene oxide aqueous solution treatment device, characterized in that: The invention comprises a light component removal tower a (2), a light component removal tower b (15), a circulating pump a (5), a circulating pump b (18), a circulating pump c (31) and an ethylene oxide refining tower b (36), wherein the circulating pump a (5) is connected to the light component removal tower a (2) through a pipeline, and the tower kettle of the light component removal tower a (2) is provided with a liquid level gauge a (3), a thermometer a (4) and a reboiler a (13); The circulation pump b (18) is connected to the light component removal tower b (15) through a pipeline. The tower bottom of the light component removal tower b (15) is provided with a liquid level gauge b (16), a thermometer b (17) and a reboiler b (57); The ethylene oxide refining tower b (36) is connected to a circulation pump d (41), a flow meter g (42), a flow control valve g (43) and a solenoid valve g (44) through a pipeline; The lower part of the ethylene oxide refining tower b (36) is provided with a reboiler c (37), a reboiler d (38), a liquid level gauge c (39) and a thermometer c (40); The top of the ethylene oxide refining tower b (36) is connected to the reflux tank (52) through a pipeline, and the connected pipeline is provided with a cooler a (50), a cooler b (51) and a thermometer d (58); The lower part of the reflux tank (52) is connected via a circulation pump e (56), and the circulation pump e (56) is connected to the top of the ethylene oxide refining tower b (36) via a pipeline, and a solenoid valve h (60), a flow meter i (61) and a flow control valve i (62) are provided on the connected pipeline; The ethylene oxide refining tower b (36) is connected to the cooler c (46) through a pipeline, the cooler c (46) is connected to the circulation pump f (47) through a pipeline, and the circulation pump f (47) is connected to the flow meter h (48) and the flow control valve h (49) through a pipeline; The ethylene oxide refining tower a (32) is connected to the circulation pump c (31) through a pipeline, and the connected pipeline is provided with a solenoid valve f (33), a flow meter f (34) and a flow control valve f (35) in sequence; The circulation pump b (18) and the circulation pump c (31) are connected by a pipeline, and the connected pipeline is provided with a thermometer f (63), a flow meter e (28), a flow control valve e (29), a solenoid valve e (30) and a thermometer g (66); The reflux tank (52) is also provided with a pressure gauge b (53), a pressure control valve a (54) and a pressure control valve b (55).

2. The ethylene oxide aqueous solution treatment device according to claim 1, characterized in that: The circulating pump a (5) is connected to the electromagnetic valve a (6), the flow meter a (7), the flow control valve a (8), the flow meter b (9), the flow control valve b (10), the gate valve a (11), the electromagnetic valve d (12), the gate valve c (14) and the thermometer e (64) through pipelines.

3. The ethylene oxide aqueous solution treatment device according to claim 1, characterized in that: The circulation pump b (18) is connected to the solenoid valve c (19), the flow meter c (20), the flow control valve c (21), the flow meter d (22), the flow control valve d (23), the gate valve b (24) and the solenoid valve d (25) through pipelines.

4. The ethylene oxide aqueous solution treatment device according to claim 1, characterized in that: A gate valve d(1) is provided between the solenoid valve d(25) and the thermometer f(65).

5. The ethylene oxide aqueous solution treatment device according to claim 1, characterized in that: The heat source used by the light component removal tower a (2) and the light component removal tower b (15) is the waste heat of the lean absorption liquid, and the temperature is 60°C-65°C.

6. The ethylene oxide aqueous solution treatment device according to claim 1, characterized in that: The reboiler of the ethylene oxide refining tower b (36) uses 0.6Mpag steam as the heat source, with a temperature of 150°C-170°C.

7. The ethylene oxide aqueous solution treatment device according to claim 1, characterized in that: The pressure control valve at the top of the reflux tank (52) adopts split-range control, and the pressure gauge controls the pressure control valve a (54) and the pressure control valve b (55), and the pressure is controlled at 0.2-0.3 Mpag.

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