Device for efficiently removing low-molecular-weight organic matters

Abstract

The invention relates to the field of electronic semiconductor ultrapure water manufacturing, and discloses a device for efficiently removing low-molecular-weight organic matters, which comprises a medicament storage tank for storing a sodium persulfate medicament; the mixer is connected with the agent storage tank and is used for mixing the sodium persulfate agent with the treated water; the photoreactor is communicated with the mixer through a conveying pipe; the low-pressure ultraviolet lamp is mounted in the photoreactor and is used for irradiating the mixed treated water; the baffle is arranged in the photoreactor and is used for prolonging the water flow path of the treated water. According to the method, sodium persulfate and a low-voltage ultraviolet lamp are used in cooperation, sodium persulfate can be excited by means of energy of ultraviolet light to be subjected to photolysis reaction, an active substance with high oxidizing property is generated, the active substance can act on low-molecular-weight organic matter, and the degradation efficiency of the organic matter is improved; and a continuously up-to-standard water quality basis is provided for a semiconductor ultrapure water system.

Description

Technical Field

[0001] This invention relates to the field of ultrapure water manufacturing for electronic semiconductors, and more particularly to a device for efficiently removing low molecular weight organic matter. Background Technology

[0002] In ultrapure water manufacturing systems in the semiconductor industry, some organic compounds contained in raw water (industrial water) and recycled water are difficult to remove. These organic compounds are characterized by low molecular weight (usually less than 100), low volatility, non-ionicity, and resistance to oxidation. Representative low molecular weight organic compounds that exhibit these characteristics and are frequently detected in UPW (ultrapure water) include IPA (isopropanol), THMs (trihalomethanes), and urea. However, traditional physicochemical methods used in UPW manufacturing cannot easily remove these low molecular weight organic compounds, leading to unstable TOC (total oxygen concentration) levels and affecting product yield.

[0003] A search revealed that CN107915310B discloses a highly efficient catalytic sodium hypochlorite wastewater treatment system based on a composite catalytic bed. The system includes an oxidation tower, which contains an activated carbon catalyst bed and a molecular sieve catalyst bed. The catalytic bed activates sodium hypochlorite, effectively reducing the content of recalcitrant organic matter in the wastewater and achieving deep treatment of the wastewater.

[0004] Currently, urea, a low-molecular-weight organic compound, is removed by adding sodium bromide / sodium hypochlorite to the system through a redox reaction. However, existing treatment devices require a large amount of reagents and have a slow redox reaction rate, making them unsuitable for the continuous operation requirements of UPW systems. Summary of the Invention

[0005] To address the problems mentioned above regarding the existing processing devices' large reagent requirements, slow redox reaction rates, and inability to meet the continuous operation requirements of UPW systems, the present invention provides the following technical solution.

[0006] A device for efficiently removing low molecular weight organic matter, comprising: Pharmaceutical storage tanks are used to store sodium persulfate. A mixer, connected to a reagent storage tank, is used to mix sodium persulfate reagent with the treated water. The photoreactor is connected to the mixer via a delivery pipe; Low-pressure ultraviolet lamps are installed inside the photoreactor to irradiate the mixed treated water; A baffle is installed inside the photoreactor. The baffle is configured to move along the length of the low-pressure ultraviolet lamp, and the baffle is used to extend the water flow path of the treated water.

[0007] In one embodiment, it also includes: The metering pump is connected at one end to the reagent storage tank and at the other end to the mixer. The metering pump is used to deliver sodium persulfate reagent from the reagent storage tank to the mixer.

[0008] In one embodiment, a delivery pipe is connected between the metering pump and the mixer, and a one-way valve is installed on the delivery pipe.

[0009] Preferably, the mixer includes: The inlet pipe extends to the bottom area inside the mixer at one end and is located outside the mixer at the other end. The end of the delivery pipe away from the metering pump is connected to the inlet pipe. The delivery pipe is installed at one end at the bottom of the mixer and at the other end at the bottom of the photoreactor; The solenoid valve is installed on the delivery pipe.

[0010] In one embodiment, the mixer further includes: A piston plate is installed inside the mixer and is sleeved on the inlet pipe; The third elastic element is installed between the piston plate and the top wall of the mixer; The stirring rod is installed at the bottom of the piston plate.

[0011] In one embodiment, the piston plate includes: A groove is formed at the bottom of the piston plate, and the stirring rod is set in the groove; The second elastic element is installed in the groove and is connected to one end of the stirring rod. A winding reel is fitted onto the stirring rod; A connecting rope is wound around a connecting wheel at one end. A limiting plate is installed on the mixer, which is located below the piston plate. The other end of the connecting rope passes through the piston plate and is connected to the limiting plate.

[0012] Preferably, the photoreactor comprises: The liquid outlet pipe is installed at the top of the photoreactor.

[0013] In one embodiment, the low-pressure ultraviolet lamp comprises: A protective tube is installed inside the photoreactor; The ultraviolet lamp is installed inside a protective tube; Two mounting plates are installed inside the photoreactor, and the protective tube is installed between the two mounting plates.

[0014] In a preferred embodiment, the baffle is circular, and the number of baffles is at least two.

[0015] In another embodiment, the baffle is spiral-shaped.

[0016] In another embodiment, the mixer further includes: A fixed tube is installed on top of the mixer; The control lever is mounted on the piston plate at one end and passes through the fixed tube at the other end; A rack and pinion is mounted on the control lever; The rotating rod extends into the fixed tube at one end and is connected to a gear, which meshes with a rack; the other end is equipped with a cam. The photoreactor is equipped with a drive rod, which is fixedly connected to a baffle. The top end of the drive rod penetrates the photoreactor and is connected to a top plate. A cam contacts the top of the top plate. A first elastic element is sleeved on the drive rod and is located between the top plate and the photoreactor.

[0017] This invention provides a device for efficiently removing low molecular weight organic matter. Compared with existing technologies, it has the following advantages: by using sodium persulfate in conjunction with a low-pressure ultraviolet lamp, the energy of ultraviolet light can be used to excite the sodium persulfate to undergo a photolysis reaction, generating an active substance with strong oxidizing properties. This active substance can act on low molecular weight organic matter, improving the degradation efficiency of organic matter and providing a foundation for consistently compliant water quality in semiconductor ultrapure water systems.

[0018] The baffles effectively extend the water flow path within the photoreactor, thereby increasing the contact time between the treated water and ultraviolet light, sodium persulfate, and active substances. This enhances the thoroughness of low molecular weight organic matter degradation and ensures the stability of the reaction within the photoreactor.

[0019] By moving the piston plate, the baffle can be driven to actively disrupt the flow trajectory of the treated water, break the reaction dead zone formed by the fixed flow field, and make the treated water more fully contacted with ultraviolet light and sodium persulfate active substances, thereby improving the thoroughness of degradation of low molecular weight organic matter.

[0020] When the piston plate moves under the action of the liquid surface, it will also drive the stirring rod to rotate synchronously, which can improve the mixing effect of the treated water and sodium persulfate agent, ensure that the agent is evenly distributed in the treated water, provide a uniform reaction system for the photolysis reaction, and improve the efficiency and stability of the overall treatment process. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure proposed in this invention.

[0022] Figure 2 This is a schematic diagram of the cross-section of the photoreactor proposed in this invention.

[0023] Figure 3 This is a schematic diagram of the cross-section of the low-pressure ultraviolet lamp proposed in this invention.

[0024] Figure 4 This is a schematic cross-sectional view of the mixer proposed in this invention.

[0025] Figure 5 This is a cross-sectional schematic diagram of the mixer proposed in this invention from another perspective.

[0026] Figure 6 This is a schematic diagram of the piston plate and stirring rod structure proposed in this invention.

[0027] Figure 7 for Figure 6 Schematic diagram of the cross-section of the piston plate.

[0028] Figure 8 This is a schematic diagram of the baffle structure proposed in Embodiment 2 of the present invention.

[0029] Figure 9 This is a schematic diagram of the mixer and fixing tube proposed in Embodiment 3 of the present invention.

[0030] Figure 10 This is a schematic diagram of the cross-section of the fixed tube and control rod proposed in Embodiment 3 of the present invention.

[0031] Figure 11 for Figure 10 Enlarged view of the central fixed tube, control rod, cam, drive rod, and top plate.

[0032] The attached figures are labeled as follows: 100. Photoreactor; 101. Liquid outlet pipe; 102. Drive rod; 103. Top plate; 104. First elastic element; 200. Mixer; 201. Inlet pipe; 202. Delivery pipe; 203. Solenoid valve; 204. Limiting plate; 205. Fixing pipe; 206. Control lever; 207. Rack; 208. Rotating rod; 209. Gear; 210. Cam; 300. Pharmaceutical storage tank; 301. Metering pump; 302. Drug delivery pipe; 303. Check valve; 400. Low-pressure ultraviolet lamp; 401. Protective tube; 402. Ultraviolet lamp tube; 403. Mounting plate; 500, baffle; 600, Piston plate; 601, Stirring rod; 602, Winding reel; 603, Connecting rope; 604, Second elastic element; 605, Third elastic element. Detailed Implementation

[0033] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0034] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0035] Example 1: Refer to Figures 1-7 A device for efficiently removing low molecular weight organic matter, comprising: 300 chemical storage tank is used to store sodium persulfate. Mixer 200 is connected to reagent storage tank 300 and is used to mix sodium persulfate reagent with treated water; The photoreactor 100 is connected to the mixer 200 via a delivery pipe 202; A low-pressure ultraviolet lamp 400 is installed inside the photoreactor 100 to irradiate the mixed treated water. A baffle 500 is disposed inside the photoreactor 100. The baffle 500 is used to extend the water flow path of the treated water and is configured to move along the length of the low-pressure ultraviolet lamp 400.

[0036] In the above technical solution, sodium persulfate is used as an oxidant. After being fully mixed with the treated water in the mixer 200, it enters the photoreactor 100. The low-pressure ultraviolet lamp 400 in the photoreactor 100 irradiates the mixture, triggering a photolysis reaction of sodium persulfate to generate active substances such as hydroxyl radicals (·OH) with strong oxidizing properties. These active substances can destroy the molecular structure of low molecular weight organic matter and oxidize and decompose it into harmless substances. The baffle 500 in the photoreactor 100 increases the residence time of the treated water in the photoreactor 100 by extending the water flow path. The baffle 500 can also move a certain distance on the low-pressure ultraviolet lamp 400. When the water flows into the photoreactor 100, it impacts the baffle 500, causing it to shift. This allows the treated water to come into more thorough contact with the ultraviolet light, sodium persulfate, and the generated active substances, thus removing low molecular weight organic matter from the treated water.

[0037] The photo-initiated decomposition formula for sodium persulfate is: The overall reaction formula for the oxidative degradation of urea is: It also includes: a metering pump 301, one end of which is connected to a drug storage tank 300 and the other end of which is connected to a mixer 200. The metering pump 301 is used to transport sodium persulfate in the drug storage tank 300 to the mixer 200. A drug delivery pipe 302 is connected between the metering pump 301 and the mixer 200, and a one-way valve 303 is installed on the drug delivery pipe 302.

[0038] Specifically, the metering pump 301 can adjust the flow rate of the reagent, so that the sodium persulfate reagent enters the mixer 200 in a preset ratio, providing a reagent basis for the subsequent thorough mixing with the treated water and the oxidative degradation in the photoreaction; the delivery pipe 302 serves as the connection channel between the metering pump 301 and the mixer 200, realizing the directional delivery of the reagent; the one-way valve 303 only allows the fluid to flow unidirectionally from the metering pump 301 to the mixer 200, and prevents the fluid from flowing in reverse when the pressure inside the mixer 200 is higher than the pressure inside the delivery pipe 302.

[0039] The mixer 200 includes: an inlet pipe 201, one end of which extends to the bottom region inside the mixer 200, and the other end which is disposed outside the mixer 200; the end of the delivery pipe 302 away from the metering pump 301 is connected to the inlet pipe 201; a delivery pipe 202, one end of which is installed at the bottom of the mixer 200, and the other end of which is installed at the bottom of the photoreactor 100; a solenoid valve 203, which is installed on the delivery pipe 202; a piston plate 600, which is disposed inside the mixer 200 and sleeved on the inlet pipe 201; a third elastic element 605, which is installed between the piston plate 600 and the top wall of the mixer 200; and a stirring rod 601, which is installed at the bottom of the piston plate 600.

[0040] In the above technical solution, the third elastic element 605 is a compression spring, or a flexible elastic strip can be used. The inlet pipe 201 extends to the bottom of the mixer 200, and a one-way valve 303 is also installed inside the inlet pipe 201, so that the sodium persulfate agent delivered by the delivery pipe 302 directly enters the bottom area of ​​the mixer 200. After the treated water enters from the inlet of the inlet pipe 201, it flows upward along the bottom, and the kinetic energy of the rising liquid forms a counter-current impact with the agent to achieve preliminary mixing. The continuous entry of treated water causes the liquid level to rise, and its buoyancy overcomes the third elastic element 605. The elastic force of the elastic element 605 pushes the piston plate 600 to slide upward along the liquid inlet pipe 201. The stirring rod 601 at the bottom of the piston plate 600 moves upward accordingly. During the movement, it forms a shearing and stirring effect on the liquid, enhancing the turbulence and improving the mixing effect. The third elastic element 605 is compressed and stores elastic potential energy when the piston plate 600 moves upward. When the solenoid valve 203 opens the delivery pipe 202, the elastic potential energy is released, pushing the piston plate 600 to move downward and reset. The piston plate 600 can then be used to send the mixed treated water into the photoreactor 100.

[0041] The piston plate 600 includes: A groove is formed at the bottom of the piston plate 600, and the stirring rod 601 is disposed in the groove; The second elastic element 604 is installed in the groove and is connected to one end of the stirring rod 601. A winding wheel 602 is fitted onto a stirring rod 601; A connecting rope 603 is wound around a connecting wheel at one end. A limiting plate 204 is installed on the mixer 200. The limiting plate 204 is located below the piston plate 600. The other end of the connecting rope 603 passes through the piston plate 600 and is connected to the limiting plate 204.

[0042] Specifically, the second elastic element 604 is a spring-loaded spring, and the groove provides installation space for the second elastic element 604, the stirring rod 601, and the winding wheel 602. When the treated water rises from the bottom of the mixer 200, raising the liquid level, the buoyancy of the water pushes the piston plate 600 to slide upward along the inlet pipe 201. Because one end of the connecting rope 603 is fixed to the limiting plate 204 inside the mixer 200, and the other end is wound around the winding wheel 602 and stretched as the piston plate 600 moves upward, the tension drives the winding wheel 602 to rotate around the axis of the stirring rod 601, causing... The stirring rod 601, fitted with the winding wheel 602, rotates synchronously to achieve rotary stirring. During this process, one end of the stirring rod 601 presses against the second elastic element 604 to store force. When the amount of water to be treated decreases, the third elastic element 605 pushes the piston plate 600 to move down and reset. At the same time, the second elastic element 604 releases the stored force, causing the winding wheel 602 to rotate in the opposite direction to wind up the connecting rope 603, causing the stirring rod 601 to rotate in the opposite direction. The continuous rotation of the stirring rod 601 during the lifting and lowering of the piston plate 600 ensures that the reagent and the treated water are always in a mixed state.

[0043] The photoreactor 100 includes: an outlet pipe 101, which is installed at the top of the photoreactor 100; the outlet pipe 101 is used to discharge the treated water.

[0044] The low-pressure ultraviolet lamp 400 includes: Protective tube 401 is installed inside photoreactor 100; The ultraviolet lamp 402 is installed inside the protective tube 401; the wavelength of the ultraviolet lamp 402 is 185nm. Two mounting plates 403 are installed inside the photoreactor 100, and the protective tube 401 is installed between the two mounting plates 403.

[0045] Specifically, the 185nm wavelength belongs to the deep ultraviolet region of the ultraviolet spectrum. Its photon energy can break the chemical bonds in sodium persulfate molecules, causing sodium persulfate to photolyze and generate active substances such as hydroxyl radicals (・OH) with strong oxidizing properties. These active substances can attack the molecular structure of low molecular weight organic matter, oxidizing and decomposing it into harmless substances such as carbon dioxide and water. The protective tube 401 is made of corrosion-resistant material with high ultraviolet transmittance, such as quartz glass or acrylic sheet. The protective tube 401 acts as a physical barrier to prevent the treated water from directly contacting the ultraviolet lamp tube 402, avoiding damage to the lamp tube electrodes due to moisture or surface scaling that affects the ultraviolet transmittance. It also ensures that ultraviolet light can efficiently penetrate into the treated water. The two mounting plates 403 can fix the protective tube 401 inside the photoreactor 100.

[0046] The baffle 500 is circular, and there are at least two baffles 500.

[0047] Specifically, at least two circular baffles 500 form a multi-stage blocking structure, which can further extend the water flow path of the treated water and increase its residence time in the photoreactor 100. At the same time, each baffle 500 can intensify the turbulence, so that the treated water can have more sufficient contact with ultraviolet light, sodium persulfate reagent and active substances, thereby improving the degradation efficiency of low molecular weight organic matter.

[0048] Example 2: Refer to Figure 8 The difference between this embodiment and Embodiment 1 is that the baffle 500 is spiral-shaped.

[0049] Specifically, in this embodiment, the spiral profile of the spiral baffle 500 matches the curvature of the inner wall of the cylindrical photoreactor 100. After installation, it can form a closed spiral flow channel inside the reactor. After the treated water enters the photoreactor 100, it is forced to rotate along the spiral trajectory under the guidance of the spiral channel. In this process, the residence time of the water in the reactor is extended, allowing the low molecular weight organic matter and sodium persulfate in the treated water to come into more sufficient contact with the ultraviolet light; ensuring that the low-pressure 185nm ultraviolet lamp can fully excite the photolysis of sodium persulfate to generate strong oxidizing active substances.

[0050] Example 3: Refer to Figures 9-11 The difference between this embodiment and Embodiment 1 is that the mixer 200 further includes: Fixed tube 205 is installed on top of mixer 200; The control lever 206 is mounted on the piston plate 600 at one end and passes through the fixing tube 205 at the other end. Rack 207 is mounted on control lever 206; The rotating rod 208 extends into the fixed tube 205 at one end and is connected to a gear 209, which meshes with the rack 207. The other end is equipped with a cam 210. The photoreactor 100 is provided with a drive rod 102, which is fixedly connected to the baffle 500. The top end of the drive rod 102 passes through the photoreactor 100 and is connected to the top plate 103. The cam 210 contacts the top of the top plate 103. A first elastic element 104 is sleeved on the drive rod 102 and is disposed between the top plate 103 and the photoreactor 100.

[0051] In the above technical solution, when the water level changes, the piston plate 600 is pushed up and down along the inlet pipe 201. The piston plate 600 will squeeze the third elastic element 605, causing the third elastic element 605 to compress and store force. When the solenoid valve 203 opens the delivery pipe 202, the piston plate 600 returns to its original position under the elastic action of the third elastic element 605. During this process, the piston plate 600 drives the connected control rod 206 to move up and down synchronously. The fixed pipe 205 provides stable guidance for the control rod 206 to avoid deviation. The rack 207 on the control rod 206 moves up and down with the control rod 206 and meshes with the gear 209 at one end of the rotating rod 208 to drive the rotating rod 208. 8. Rotate around its own axis; the cam 210 at the other end of the rotating rod 208 rotates with the rotating rod 208, periodically pressing the top plate 103. The top plate 103 squeezes the first elastic element 104. The first elastic element 104 is a compression spring or a spring block. When the first elastic element 104 is squeezed by the top plate 103, it stores force. When the cam 210 releases the top plate 103, it resets. With the pressing of the cam 210, the top plate 103 moves up and down reciprocally. The top plate 103 drives the drive rod 102 to move up and down along the axis of the photoreactor 100 to drive the baffle 500 to move up and down slightly. The increased range of motion of the baffle 500 can further extend the water flow path and intensify turbulence.

[0052] Compared to a fixed baffle 500, in this embodiment, the baffle 500 is movably connected to the low-pressure ultraviolet lamp 400. The dynamically moving baffle 500 can actively disrupt the flow trajectory of the treated water, break the reaction dead zone formed by the fixed flow field, and make the treated water more fully contacted with ultraviolet light and sodium persulfate active substances, thereby improving the thoroughness of degradation of low molecular weight organic matter.

[0053] During use, the sodium persulfate stored in the reagent storage tank 300 is directed to flow through the delivery pipe 302 between the metering pump 301 and the mixer 200, driven by the metering pump 301. The reagent is delivered from the delivery pipe 302 to the inlet pipe 201, and then from the inlet pipe 201 into the mixer 200. The one-way valve 303 on the delivery pipe 302 only allows the reagent to flow towards the mixer 200. At the same time, the metering pump 301 can adjust the reagent delivery flow rate according to the preset process parameters.

[0054] The treated water enters from the inlet pipe 201 outside the mixer 200, and impacts the sodium persulfate reagent in the inlet pipe 201 and the bottom area of ​​the mixer 200, achieving initial mixing. As the treated water and reagent continue to enter, the liquid level inside the mixer 200 gradually rises. The buoyancy of the water flow overcomes the elastic force of the third elastic element 605, pushing the piston plate 600 sleeved on the inlet pipe 201 to slide upward. When the piston plate 600 moves upward, the connecting rope 603 wrapped around the stirring rod 601 in its bottom groove is stretched, pulling the winding wheel 602 around the stirring rod 601. The axis of 01 rotates, causing the stirring rod 601 to rotate synchronously. At the same time, one end of the stirring rod 601 squeezes the second elastic element 604 to store force. The stirring rod 601 stirs the mixture to enhance the uniformity of mixing. When the mixture reaches the preset mixing degree, the solenoid valve 203 installed on the conveying pipe 202 between the mixer 200 and the photoreactor 100 opens. The third elastic element 605 releases the stored elastic potential energy, pushing the piston plate 600 to move down and reset, and pressurizing the uniformly mixed water to the bottom of the photoreactor 100 through the conveying pipe 202.

[0055] After the mixed liquid enters from the bottom of the photoreactor 100, it is affected by the circular baffle 500 or spiral baffle 500 inside the photoreactor 100. The water flow path is extended, the residence time is increased and the turbulence is intensified, ensuring that the mixed liquid is in full contact with the low-pressure ultraviolet lamp 400 inside the photoreactor 100. When the 185nm wavelength ultraviolet lamp 402 is turned on, the deep ultraviolet photons it releases break the chemical bonds of sodium persulfate molecules, causing sodium persulfate to photolyze and generate active substances such as highly oxidizing hydroxyl radicals (・OH). The hydroxyl radicals come into full contact with the low molecular weight organic matter in the mixed liquid, destroying its molecular structure and oxidizing and decomposing it into harmless substances such as carbon dioxide and water.

[0056] After being degraded by the photoreactor 100, the treated water that meets the TOC index requirements is discharged from the outlet pipe 101 at the top of the photoreactor 100, completing the efficient removal process of low molecular weight organic matter.

[0057] In summary, compared with existing technologies, it has the following beneficial effects: By using sodium persulfate in conjunction with a low-pressure UV lamp 400, the energy of ultraviolet light can be used to stimulate the photolysis reaction of sodium persulfate, generating active substances with strong oxidizing properties. These active substances can act on low molecular weight organic matter, improving the degradation efficiency of organic matter and providing a continuous water quality foundation for the semiconductor ultrapure water system.

[0058] The baffle 500 effectively extends the water flow path within the photoreactor 100, thereby increasing the contact time between the treated water and ultraviolet light, sodium persulfate reagent, and active substances, improving the thoroughness of low molecular weight organic matter degradation, and ensuring the stability of the reaction effect within the photoreactor 100.

[0059] By moving the piston plate 600, the baffle 500 can be driven to actively disrupt the flow trajectory of the treated water, break the reaction dead zone formed by the fixed flow field, and make the treated water more fully contacted with ultraviolet light and sodium persulfate active substances, thereby improving the thoroughness of degradation of low molecular weight organic matter.

[0060] When the piston plate 600 moves under the action of the liquid surface, it will drive the stirring rod 601 to rotate synchronously, which can improve the mixing effect of the treated water and sodium persulfate agent, ensure that the agent is evenly distributed in the treated water, provide a uniform reaction system for the photolysis reaction, and improve the efficiency and stability of the overall treatment process.

[0061] Therefore, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the foregoing disclosure, and it should be understood that in some cases, certain features of the invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the invention. The invention is not intended to be limited to the specific terminology used in the following claims and / or the specific embodiments disclosed as the best mode for carrying out the invention, but the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the invention will be defined only by the appended claims.

Claims

1. A device for efficiently removing low molecular weight organic matter, characterized in that, include: Pharmaceutical storage tanks are used to store sodium persulfate. A mixer, connected to a reagent storage tank, is used to mix sodium persulfate reagent with the treated water. The photoreactor is connected to the mixer via a delivery pipe; Low-pressure ultraviolet lamps are installed inside the photoreactor to irradiate the mixed treated water; A baffle is installed inside the photoreactor. The baffle is configured to move along the length of the low-pressure ultraviolet lamp, and the baffle is used to extend the water flow path of the treated water.

2. The device for efficiently removing low molecular weight organic matter according to claim 1, characterized in that, Also includes: The metering pump is connected at one end to the reagent storage tank and at the other end to the mixer. The metering pump is used to deliver sodium persulfate reagent from the reagent storage tank to the mixer.

3. The device for efficiently removing low molecular weight organic matter according to claim 2, characterized in that, A delivery pipe is connected between the metering pump and the mixer, and a one-way valve is installed on the delivery pipe.

4. The device for efficiently removing low molecular weight organic matter according to claim 3, characterized in that, The mixer includes: The inlet pipe extends to the bottom area inside the mixer at one end and is located outside the mixer at the other end. The end of the delivery pipe away from the metering pump is connected to the inlet pipe. The delivery pipe is installed at one end at the bottom of the mixer and at the other end at the bottom of the photoreactor; The solenoid valve is installed on the delivery pipe.

5. The device for efficiently removing low molecular weight organic matter according to claim 4, characterized in that, The mixer also includes: A piston plate is installed inside the mixer and is sleeved on the inlet pipe; The third elastic element is installed between the piston plate and the top wall of the mixer; The stirring rod is installed at the bottom of the piston plate.

6. The device for efficiently removing low molecular weight organic matter according to claim 5, characterized in that, The piston plate includes: A groove is formed at the bottom of the piston plate, and the stirring rod is set in the groove; The second elastic element is installed in the groove and is connected to one end of the stirring rod. A winding reel is fitted onto the stirring rod; A connecting rope is wound around a connecting wheel at one end. A limiting plate is installed on the mixer, which is located below the piston plate. The other end of the connecting rope passes through the piston plate and is connected to the limiting plate.

7. The device for efficiently removing low molecular weight organic matter according to claim 1, characterized in that, The photoreactor includes: The liquid outlet pipe is installed at the top of the photoreactor.

8. The device for efficiently removing low molecular weight organic matter according to claim 1, characterized in that, The low-pressure ultraviolet lamp includes: A protective tube is installed inside the photoreactor; The ultraviolet lamp is installed inside a protective tube; Two mounting plates are installed inside the photoreactor, and the protective tube is installed between the two mounting plates.

9. The device for efficiently removing low molecular weight organic matter according to claim 1, characterized in that, The baffle is circular, and there are at least two baffles.

10. The device for efficiently removing low molecular weight organic matter according to claim 1, characterized in that, The baffle is spiral-shaped.

11. The device for efficiently removing low molecular weight organic matter according to claim 4, characterized in that, The mixer also includes: A fixed tube is installed on top of the mixer; The control lever is mounted on the piston plate at one end and passes through the fixed tube at the other end; A rack and pinion is mounted on the control lever; The rotating rod extends into the fixed tube at one end and is connected to a gear, which meshes with a rack; the other end is equipped with a cam. The photoreactor is equipped with a drive rod, which is fixedly connected to a baffle. The top end of the drive rod penetrates the photoreactor and is connected to a top plate. The cam contacts the top of the top plate.

12. The device for efficiently removing low molecular weight organic matter according to claim 11, characterized in that, The drive rod is fitted with a first elastic element, which is disposed between the top plate and the photoreactor.

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