A gas stripping system and method for separating ethephon in dichloroethane

Abstract

This invention discloses a dissolved gas extraction system and method for separating ethephon from dichloroethyl ether, comprising a first tank, a second tank, a third tank, and an extraction tower. The first tank stores water and is connected to the second tank, where dissolved gas water is mixed to form dissolved gas water. The third tank stores dichloroethyl ether containing ethephon. A partition is installed inside the first tower, with the inner and outer sides of the partition being a first cavity and a second cavity, respectively. Dissolved gas water and the dichloroethyl ether containing ethephon are delivered to the first cavity. The first tower is fitted with a packing material inside the second tower. The second tower has a top cover with a first outlet and a second outlet on its side wall and top. The first tower has a bottom cover with a third outlet. The bottom of the first tower has a first through hole connecting the second cavity and the interior of the bottom cover. This invention enhances mass transfer by releasing microbubbles from the dissolved gas water, continuously renewing the phase interface and significantly improving the volumetric mass transfer coefficient and ethephon extraction efficiency.

Description

Technical Field

[0001] This invention relates to the field of ethephon production and separation technology, and more specifically, to a dissolved gas extraction system and method for separating ethephon from dichloroethyl ether. Background Technology

[0002] Ethephon is a highly efficient plant growth regulator widely used in agricultural production. During its synthesis and solvent recovery processes, dichloroethyl ether organic liquid containing ethephon is generated. Industrially, liquid-liquid extraction is usually used, with water as the extractant to transfer ethephon from the dichloroethyl ether phase to the aqueous phase, thereby achieving ethephon recovery and dichloroethyl ether solvent purification and reuse. The mass transfer efficiency of the extraction process directly determines the product yield and process operating costs.

[0003] Currently, mainstream extraction equipment is mainly divided into two categories, both of which have technical limitations. One is the mechanically stirred extraction tower, which relies on the stirring paddle to shear and break up droplets to enhance mass transfer. However, the built-in rotating parts have high energy consumption, the dynamic seals are prone to leakage, the failure rate is high, and the maintenance cost is high. The other is the packed extraction tower, which has no rotating parts and low energy consumption. However, it relies solely on the static specific surface area of ​​the packing for mass transfer, resulting in a limited total mass transfer area. The fluid is prone to channeling and dead zones, the phase interface renewal is slow, and the volumetric mass transfer coefficient is low. The tower body and packing volume need to be increased to meet the separation requirements. The equipment is large in size and has insufficient processing capacity per unit volume. Therefore, a technical solution is needed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art, improve the extraction processing capacity, increase the volumetric mass transfer coefficient and ethephon extraction efficiency, and provide a dissolved gas extraction system and method for separating ethephon from dichloroethyl ether.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention discloses a dissolved air extraction system for separating ethephon from dichloroethyl ether, comprising a first tank, a second tank, a third tank, and an extraction tower. The first tank stores water and is connected to the second tank. The second tank mixes water and compressed air to form dissolved air water. The third tank stores dichloroethyl ether containing ethephon.

[0007] The extraction tower includes a first tower body, a second tower body, a top cover, and a bottom cover. A partition is installed inside the first tower body, dividing the interior of the first tower body into a first cavity and a second cavity. The inner and outer sides of the partition are respectively the first and second cavities. A second tank delivers dissolved gas water to the first cavity, and a third tank delivers a dichloroethyl ether solution containing ethephon to the first cavity. The second tower body is fixedly installed at the upper opening of the first tower body. The second tower body is filled with tetrafluoroethylene corrugated packing. A top cover is installed at the upper opening of the second tower body. The side wall of the top cover has a first outlet, and the top of the top cover has a second outlet. A bottom cover is installed at the bottom of the first tower body. The bottom of the first tower body has a first through hole connecting the second cavity and the interior of the bottom cover. The bottom of the bottom cover has a third outlet.

[0008] Furthermore, the second tank is connected to the first cavity through a first inlet pipe, the outlet end of the first inlet pipe being located at the bottom of the first cavity, and the third tank is connected to the first cavity through a second inlet pipe, the outlet end of the second inlet pipe being close to the outlet end of the first inlet pipe.

[0009] Furthermore, the upper end of the partition cylinder is open, and the upper end of the partition cylinder is lower than the upper end of the first tower body.

[0010] Furthermore, a level gauge is installed in the first tower body to monitor the liquid level of dichloroethyl ether in the second chamber.

[0011] Furthermore, a dispersion assembly is installed in the first tower body. The dispersion assembly is installed at the bottom of the partition cylinder. The dispersion assembly includes a base and a rotating cover. The base is provided with a connecting pipe. One end of the connecting pipe is connected to the first liquid inlet pipe, and the other end of the connecting pipe is located in the center of the base. The rotating cover is rotatably installed on the upper end of the base. The rotating cover includes multiple blades. The multiple blades are arranged in a ring, and a gap is formed between two adjacent blades.

[0012] Furthermore, an elbow is installed at one end of the connecting pipe inside the base, with the end of the elbow away from the connecting pipe facing upward toward the center of the rotating cover. A stop block is installed at the center of the rotating cover, and the stop block is a cone with a diameter that gradually increases from bottom to top, with the lower end of the stop block close to the elbow.

[0013] Furthermore, the blades are curved along their length, and the upper ends of multiple blades are connected to form a circular cover. One side of the blades along their width is inclined outward away from the center of the rotating cover.

[0014] Furthermore, the side wall of the base is provided with a plurality of second through holes, which are arranged in a ring. The second through holes connect the interior of the base and the first cavity, and are located below the connecting pipe.

[0015] This invention also discloses a method for separating ethephon from dichloroethyl ether, based on the above-mentioned dissolved gas extraction system for separating ethephon from dichloroethyl ether, comprising the following steps:

[0016] S1. The contents of the first tank are pumped to the second tank, and after adding an appropriate amount of compressed air, they are pumped to the extraction tower through a regulating valve and a dissolved gas release device.

[0017] S2. After the dissolved air water in the second tank of the extraction tower has stabilized, the dichloroethyl ether solution containing ethephon in the third tank is transported to the extraction tower by the transfer pump.

[0018] S3. In the first chamber, the dichloroethyl ether solution containing ethephon is efficiently mixed with dissolved air water and then dissolved in water. The density of the ethephon aqueous solution is lower than that of dichloroethyl ether. After passing through the tetrafluoroethylene corrugated packing, it flows out from the first outlet of the top cover of the extraction tower.

[0019] S4. Dichloroethyl ether has a higher density than the ethephon aqueous solution and slowly settles to the bottom of the extraction tower. At the same time, the dichloroethyl ether level in the extraction tower is monitored in real time by a level gauge, and excess crude dichloroethyl ether is discharged from the bottom through the third outlet of the bottom cover.

[0020] Furthermore, in step S2, the flow ratio of dissolved air water to dichloroethyl ether containing ethephon is controlled at 2:1.

[0021] In step S4, the volume ratio of dichloroethyl ether temporarily stored in the second cavity and the bottom cover is controlled at 25% to 35%.

[0022] The beneficial effects of this invention are:

[0023] 1. This invention enhances mass transfer by releasing microbubbles from dissolved air water. Microbubbles have a large specific surface area, which can exponentially increase the contact area between the two phases. During the rising process, the bubbles continuously agitate, break up, and re-aggregate, constantly renewing the phase interface. This effectively suppresses channeling and dead zone phenomena common in traditional packed towers, significantly improving the volumetric mass transfer coefficient and ethephon extraction efficiency. The rising bubbles drive the liquid flow to form a pneumatic stirring effect, which reduces the tendency of droplet coalescence and thins the mass transfer boundary layer, allowing for more complete interphase mass exchange. The static mass transfer surface of the packing and the dynamic mass transfer interface of the dissolved air bubbles form a complementary superposition, significantly increasing the total mass transfer area per unit tower volume. This makes the equipment structure more compact, allowing for a reduction in tower size at the same throughput, or a significant increase in throughput at the same equipment size, combining the advantages of high-efficiency separation and space saving.

[0024] 2. This invention divides the first tower body into a first chamber and a second chamber using a partition. The first chamber serves as the main mixing zone to centrally complete gas-liquid enhanced mass transfer, while the second chamber serves as an annular settling zone to achieve natural sedimentation separation of the heavy phase. Extraction and zoned sedimentation are coupled within the same tower body, shortening the process flow. The rotating hood of the dispersion component is driven by the hydraulic impact of the dissolved gas and water itself, requiring no additional power. The inclined arc structure of the blades allows the dissolved gas and water to be tangentially ejected from the gaps, forming a uniform and fine microbubble flow, which enhances the initial dispersion effect at the bottom. The combination of the conical baffle and the elbow allows the jet to diffuse evenly in all directions, avoiding uneven distribution caused by local direct impact. The tetrafluoroethylene corrugated packing is resistant to dichloroethyl ether corrosion, and the corrugated channel repeatedly divides and redisperses the rising liquid flow, further breaking up and merging droplets, extending the contact time, and ensuring the mass transfer depth. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of one embodiment.

[0026] Figure 2 This is a schematic diagram of one structure of the first tower body in this embodiment.

[0027] Figure 3 This is a perspective view of the distributed components in this embodiment.

[0028] Figure 4 This is a cross-sectional view of the distributed component in this embodiment.

[0029] Reference numerals: 1. First tank; 2. Second tank; 3. Third tank; 4. Extraction tower; 41. First tower body; 411. Divider; 412. First inlet; 413. Second inlet; 414. Third inlet; 415. First through hole; 42. Second tower body; 43. Top cover; 431. First outlet; 432. Second outlet; 44. Bottom cover; 441. Third outlet; 45. Dispersion assembly; 451. Base; 4511. Second through hole; 4512. Connecting pipe; 4513. Elbow; 452. Rotating hood; 4521. Blade; 4522. Gap; 4523. Baffle; 5. First inlet pipe; 6. Second inlet pipe; 61. Dispenser connector; 611. Outlet head; 7. Interface gauge; 101. First chamber; 102. Second chamber. Detailed Implementation

[0030] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figures 1 to 4 As shown in the figure, this embodiment discloses a dissolved gas extraction system for separating ethephon from dichloroethyl ether, which mainly includes a first tank 1, a second tank 2, a third tank 3, and an extraction tower 4. The first tank 1 is a water storage tank that stores extraction water. The second tank 2 is a dissolved gas water tank. The first tank 1 is connected to the second tank 2 by a high-lift water pump. The second tank 2 is also connected to a compressed air pipeline to dissolve air in water under pressurized conditions to produce saturated dissolved gas water. The third tank 3 is a raw material tank that stores dichloroethyl ether containing ethephon. The extraction tower 4 is a vertical structure that includes a bottom cover 44, a first tower body 41, a second tower body 42, and a top cover 43 from bottom to top. The parts are connected by flange seals.

[0032] like Figure 2 As shown, the first tower body 41 is a cylindrical shell. A partition cylinder 411 is coaxially mounted inside the first tower body 41. The partition cylinder 411 is a cylindrical structure with an open top and a closed bottom. An annular space is left between the outer wall of the partition cylinder 411 and the inner wall of the first tower body 41. The partition cylinder 411 divides the internal space of the first tower body 41 into two parts: the interior of the partition cylinder 411 is the first cavity 101, serving as the main mixing and extraction zone; the annular space between the outer wall of the partition cylinder 411 and the inner wall of the first tower body 41, and... The space at the top of the partition 411 is the second cavity 102, which serves as a temporary storage area for heavy phase sedimentation. The upper end of the partition 411 is open, and the upper surface of the partition 411 is lower than the upper surface of the first tower body 41, so that the first cavity 101 and the second cavity 102 are interconnected above the partition 411. At the same time, it ensures that there is a space between the upper end of the partition 411 and the second tower body 42, forming a buffer part to prevent the dichloroethyl ether in the extraction section from directly contacting the packing in the second tower body 42.

[0033] The lower part of the side wall of the first tower body 41 is provided with a first inlet 412, and the upper part of the side wall of the first tower body 41 is provided with a second inlet 413. The first liquid inlet pipe 5 passes through the first inlet 412 and connects the second tank body 2 and the first cavity 101. The first liquid inlet pipe 5 also passes through the partition cylinder 411 and is used to introduce dissolved gas water into the first cavity 101. The second liquid inlet pipe 6 passes through the second inlet 413 and connects the third tank body 3 and the second cavity 102 and is used to introduce dichloroethyl ether containing ethephon into the first cavity 101. The outlet end of the first liquid inlet pipe 5 extends into the first cavity 101. At the lower center position, the second liquid inlet pipe 6 extends from the upper center of the partition cylinder 411. The outlet end of the second liquid inlet pipe 6 is arranged close to the outlet end of the first liquid inlet pipe 5, so that the dissolved air water and the raw material liquid begin to come into contact and mix at the bottom of the first cavity 101. A liquid separator 61 is installed at the outlet end of the second liquid inlet pipe 6. Multiple liquid outlets 611 are distributed on the liquid separator 61. The multiple liquid outlets 611 are arranged in a ring array. The outer ends of the liquid outlets 611 are inclined downwards, so that the dichloroethyl ether liquid enters the first cavity 101 evenly at multiple points, improving the initial dispersion effect.

[0034] like Figure 2 , Figure 3 , Figure 4 As shown, a dispersion assembly 45 is installed at the bottom of the first cavity 101 and the lower end of the partition cylinder 411. The dispersion assembly 45 includes a base 451 and a rotating cover 452. The base 451 is a cylindrical shell with an open top and is fixedly installed at the bottom of the partition cylinder 411. A connecting pipe 4512 is provided on the side wall of the base 451. The outer end of the connecting pipe 4512 is connected to the first liquid inlet pipe 5. The inner end of the connecting pipe 4512 extends to the center position inside the base 451. An elbow 4513 is installed at one end of the connecting pipe 4512 inside the base 451. The outlet end of the elbow 4513 is vertically upward and faces the central axis position of the rotating cover 452.

[0035] The rotating cover 452 is rotatably mounted on the upper opening of the base 451 via a bearing, and can rotate around its own axis. The rotating cover 452 is composed of multiple blades 4521 arranged in a ring. The upper ends of the multiple blades 4521 are connected, forming an inverted circular cover. The length direction of each blade 4521 is curved in an arc, and the width direction of the blade 4521 is inclined outward. That is, one side of the blade 4521 is away from the center of the rotating cover 452 and deflected outward, so that an oblique gap 4522 is formed between two adjacent blades 4521. A stop block 4523 is fixedly installed at the center of the top of the rotating cover 452. The stop block 4523 is a cone shape with a smaller bottom and a larger top, and the lower end of the cone is close to the outlet of the elbow 4513.

[0036] During operation, pressurized dissolved air water is sprayed upward through connecting pipe 4512 and elbow 4513, directly hitting the conical surface of baffle 4523. The water flow spreads outward along the conical surface and impacts the inner surface of blade 4521. Due to the inclined arrangement of blade 4521, the tangential component of the water flow on blade 4521 pushes the rotating cover 452 to rotate continuously around the axis. Under the rotational shearing action, the dissolved air water is thrown out from the gap 4522, forming a finer and more uniform microbubble flow that enters the first cavity 101. At the same time, the rotation of the rotating cover 452 further agitates the surrounding liquid, enhancing the bottom mixing effect.

[0037] The lower part of the side wall of the base 451 is provided with a plurality of second through holes 4511. The plurality of second through holes 4511 are evenly arranged in the circumferential direction. The second through holes 4511 connect the interior of the base 451 with the first cavity 101. The position of the second through holes 4511 is lower than the inlet position of the connecting pipe 4512. The second through holes 4511 at the bottom of the base 451 allow some liquid to circulate inside and outside the base 451, avoiding the formation of sediment dead zones near the base 451.

[0038] A first through hole 415 is formed at the bottom of the first tower body 41. The first through holes 415 are arranged in a circumferential array and surround the outer periphery of the partition cylinder 411. The first through holes 415 connect the second cavity 102 with the internal space of the bottom cover 44 below, so that the dichloroethyl ether heavy phase that settles to the bottom of the second cavity 102 can flow into the bottom cover 44 through the first through hole 415. The side wall of the first tower body 41 is also provided with a third inlet 414 for installing a level gauge 7. The detection end of the level gauge 7 extends into the second cavity 102 to monitor the liquid level height of the dichloroethyl ether phase in the second cavity 102 in real time.

[0039] The second tower body 42 is fixedly installed at the upper opening of the first tower body 41. The interior of the second tower body 42 is filled with PTFE corrugated packing. The internal packing structure of the second tower body 42 is existing technology and will not be described in detail here. The PTFE corrugated packing is made of PTFE material and has continuous corrugated channels on the surface. It provides a large static specific surface area for mass transfer between the two phases and can redisperse the rising mixed liquid flow, further breaking up droplets and prolonging the contact time between the two phases. At the same time, PTFE material is resistant to organic solvent corrosion and is suitable for dichloroethyl ether systems.

[0040] The top cover 43 is sealed at the upper opening of the second tower body 42. The side wall of the top cover 43 is provided with a first outlet 431, which serves as a light phase outlet. The aqueous solution containing ethephon after extraction overflows from the first outlet 431 as a light phase. The top of the top cover 43 is provided with a second outlet 432, which serves as an exhaust port to discharge the air released from the dissolved gas water and maintain the pressure inside the tower.

[0041] The bottom cover 44 is sealed and installed at the bottom of the first tower body 41. The bottom cover 44 is conical or disc-shaped. The bottom center of the bottom cover 44 is provided with a third outlet 441, which serves as the discharge port for the heavy phase. The settled dichloroethyl ether is discharged from the third outlet 441. A liquid level regulating valve is installed on the pipeline of the third outlet 441. The regulating valve is interlocked with the interface gauge 7 and automatically adjusts the discharge flow rate according to the interface detection signal.

[0042] This embodiment also discloses a method for separating ethephon from dichloroethyl ether, which uses the above-mentioned dissolved gas extraction system for separating ethephon from dichloroethyl ether, and includes the following steps:

[0043] S1. Start the high-lift water pump to pressurize and transport the clean water in the first tank 1 to the second tank 2; at the same time, introduce compressed air into the second tank 2 to control the pressure inside the tank at 0.2-0.4MPa, so that the air is fully dissolved in the water to form saturated dissolved air water. After the dissolved air water is depressurized by the regulating valve, it is sent to the dispersion component 45 at the bottom of the extraction tower 4 through the first liquid inlet pipe 5 and the connecting pipe 4512. It is sprayed upward through the elbow 4513, impacting the baffle 4523 and pushing the rotating cover 452 to rotate. The dissolved air water is thrown out from the gap 4522, and a large number of micron-sized microbubbles are released by depressurization, which are evenly distributed in the first cavity 101 and float upward.

[0044] S2. After observing that the dissolved air water flow in the extraction tower 4 is stable and the dissolved air water level has exceeded the outlet end of the second inlet pipe 6, start the raw material delivery pump to send the ethephon-containing dichloroethyl ether solution in the third tank 3 into the first chamber 101 through the second inlet pipe 6. Adjust the two flow rates to control the volume flow ratio of dissolved air water to ethephon-containing dichloroethyl ether solution to be 2:1. The dichloroethyl ether solution is dispersed and sprayed out through multiple outlets 611 of the separator 61, and comes into counter-current contact with the microbubble flow from bottom to top in the first chamber 101.

[0045] S3. Inside the first cavity 101, the rising microbubbles drive the surrounding liquid flow to generate strong turbulence, forming a pneumatic stirring effect, which breaks down and disperses the dichloroethyl ether liquid into fine droplets, allowing ethephon to transfer rapidly from the dichloroethyl ether phase to the aqueous phase; the bubbles continuously break and repolymerize during the rising process, continuously refreshing the phase interface, effectively suppressing channeling and local dead zones, and significantly improving the liquid-liquid mass transfer rate.

[0046] The mixed liquid continues to rise, overflows from the upper end of the baffle 411 into the second tower body 42, passes through the tetrafluoroethylene corrugated packing layer, and the corrugated channels of the packing repeatedly divide and redistribute the liquid flow. On the one hand, it provides a static mass transfer surface to prolong the contact time, and on the other hand, it further breaks up the aggregated droplets to ensure continuous renewal of the mass transfer interface. After enhanced extraction by the packing layer, most of the ethephon is transferred to the aqueous phase. The aqueous solution containing ethephon has a lower density than dichloroethyl ether and rises to the top of the tower as a light phase, converging at the top cover 43. It continuously overflows and is discharged from the first outlet 431 on the side wall of the top cover 43, entering the subsequent ethephon refining process. The air released from the dissolved air water is discharged from the tower from the second outlet 432 at the top of the top cover 43.

[0047] S4. The dichloroethyl ether phase after the removal of ethephon has a higher density. During the ascent, it gradually separates from the water phase and settles downwards, flowing downwards along the annular part of the second cavity 102 outside the partition cylinder 411. The dichloroethyl ether, as a heavy phase, flows into the bottom cover 44 through the first through hole 415 at the bottom of the first tower body 41 for temporary storage.

[0048] The level gauge 7 monitors the liquid level of the dichloroethyl ether phase in the second chamber 102 and the bottom cover 44 in real time, and transmits the signal to the level regulating valve on the third outlet 441 pipeline. By automatically adjusting the discharge flow rate, the volume ratio of dichloroethyl ether temporarily stored in the second chamber 102 and the bottom cover 44 is controlled within the range of 25% to 35%. In this embodiment, it is selected to be controlled at 30%. Excess crude dichloroethyl ether is continuously discharged from the third outlet 441 and can be recycled and reused.

[0049] Through the above structure and process, this system utilizes the dynamic mass transfer interface of dissolved gas-released microbubbles to complement the static mass transfer surface of tetrafluoroethylene corrugated packing, significantly increasing the total mass transfer area per unit tower volume, and the mass transfer efficiency is significantly higher than that of ordinary packed towers. At the same time, no mechanical stirring components are required. Dispersion enhancement is achieved by relying on the physical processes of dissolution and gas release and the hydraulic self-rotation of the rotating hood 452. It has low energy consumption, no risk of dynamic seal leakage, stable and reliable operation, and a compact equipment structure with strong unit volume processing capacity. It is suitable for continuous extraction and separation of ethephon in dichloroethyl ether.

[0050] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A dissolved gas extraction system for separating ethephon from dichloroethyl ether, characterized in that, It includes a first tank (1), a second tank (2), a third tank (3) and an extraction tower (4). The first tank (1) stores water and is connected to the second tank (2). The second tank (2) mixes water and compressed air to form dissolved air water. The third tank (3) stores dichloroethyl ether containing ethephon. The extraction tower (4) includes a first tower body (41), a second tower body (42), a top cover (43), and a bottom cover (44). A partition (41) is installed inside the first tower body (41), dividing the interior of the first tower body (41) into a first cavity (101) and a second cavity (102). The inner and outer sides of the partition (41) are respectively the first cavity (101) and the second cavity (102). The second tank (2) delivers dissolved gas water to the first cavity (101), and the third tank (3) delivers a dichloroethyl ether solution containing ethephon to the first cavity (101). The first tower body (41) A second tower body (42) is fixedly installed at the upper opening of the first tower body (41). The second tower body (42) is filled with tetrafluoroethylene corrugated packing. A top cover (43) is installed at the upper opening of the second tower body (42). A first outlet (431) is provided on the side wall of the top cover (43). A second outlet (432) is provided on the top of the top cover (43). A bottom cover (44) is installed at the bottom of the first tower body (41). A first through hole (415) is provided at the bottom of the first tower body (41). The first through hole (415) connects the second cavity (102) and the interior of the bottom cover (44). A third outlet (441) is provided at the bottom of the bottom cover (44).

2. The dissolved gas extraction system for separating ethephon from dichloroethyl ether according to claim 1, characterized in that, The second tank (2) is connected to the first cavity (101) through the first inlet pipe (5). The outlet end of the first inlet pipe (5) is located at the bottom of the first cavity (101). The third tank (3) is connected to the first cavity (101) through the second inlet pipe (6). The outlet end of the second inlet pipe (6) is close to the outlet end of the first inlet pipe (5).

3. The dissolved gas extraction system for separating ethephon from dichloroethyl ether according to claim 1, characterized in that, The upper end of the partition cylinder (41) is open, and the upper end of the partition cylinder (41) is lower than the upper end of the first tower body (41).

4. The dissolved gas extraction system for separating ethephon from dichloroethyl ether according to claim 1, characterized in that, The first tower body (41) is equipped with a level gauge (7), which monitors the liquid level of dichloroethyl ether in the second chamber (102).

5. A dissolved gas extraction system for separating ethephon from dichloroethyl ether according to claim 2, characterized in that, The first tower body (41) is equipped with a dispersion component (45), which is installed at the bottom of the partition cylinder (41). The dispersion component (45) includes a base (451) and a rotating cover (452). The base (451) is provided with a connecting pipe (4512). One end of the connecting pipe (4512) is connected to the first liquid inlet pipe (5), and the other end of the connecting pipe (4512) is located at the center inside the base (451). The rotating cover (452) is rotatably installed on the upper end of the base (451). The rotating cover (452) includes multiple blades (4521), which are arranged in a ring, and a gap (4522) is formed between two adjacent blades (4521).

6. A dissolved gas extraction system for separating ethephon from dichloroethyl ether according to claim 5, characterized in that, One end of the connecting pipe (4512) located inside the base (451) is fitted with an elbow (4513). The end of the elbow (4513) away from the connecting pipe (4512) faces upward toward the center of the rotating cover (452). A stop block (4523) is installed at the center of the rotating cover (452). The stop block (4523) is a cone with a diameter that gradually increases from bottom to top. The lower end of the stop block (4523) is close to the elbow (4513).

7. A dissolved gas extraction system for separating ethephon from dichloroethyl ether according to claim 5, characterized in that, The blade (4521) is curved in the length direction, and the upper ends of multiple blades (4521) are connected to form a circular cover. One side of the blade (4521) in the width direction is inclined outward away from the center of the rotating cover (452).

8. A dissolved gas extraction system for separating ethephon from dichloroethyl ether according to claim 5, characterized in that, The side wall of the base (451) is provided with a plurality of second through holes (4511), which are arranged in a ring. The second through holes (4511) connect the interior of the base (451) and the first cavity (101). The second through holes (4511) are located below the connecting pipe (4512).

9. A method for separating ethephon from dichloroethyl ether, based on a dissolved gas extraction system for separating ethephon from dichloroethyl ether according to any one of claims 1 to 8, characterized in that, Includes the following steps: S1. The water pump in the first tank (1) is used to transport the water to the second tank (2). Compressed air is introduced into the second tank (2) and then transported to the extraction tower (4) through the regulating valve and dissolved gas release device. S2. After the dissolved air water in the second tank (2) of the extraction tower (4) has stabilized, the dichloroethyl ether solution containing ethephon in the third tank (3) is transported to the extraction tower (4) by the transfer pump. S3. In the first chamber (101), the dichloroethyl ether solution containing ethephon is efficiently mixed with dissolved air water and then dissolved in water. The density of the ethephon aqueous solution is smaller than that of dichloroethyl ether. After passing through the tetrafluoroethylene corrugated packing, it flows out from the first outlet (431) of the top cover (43) of the extraction tower (4). S4. Dichloroethyl ether has a higher density than the ethephon aqueous solution and slowly settles to the bottom of the extraction tower (4). At the same time, the dichloroethyl ether level in the extraction tower (4) is monitored in real time by the interface level gauge, and the dichloroethyl ether is discharged from the bottom through the third outlet (441) of the bottom cover (44).

10. A method for separating ethephon from dichloroethyl ether according to claim 9, characterized in that, In step S2, the flow ratio of dissolved air water to dichloroethyl ether containing ethephon is controlled at 2:

1. In step S4, the volume ratio of dichloroethyl ether temporarily stored in the second cavity (102) and the bottom cover (44) is controlled to be 25% to 35%.

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