Ethylthiurea wastewater purification device and purification equipment with integrated structure of concentration

Abstract

The application discloses an ethylthiambutene wastewater purification device and a purification equipment with a concentration integrated structure, relates to the technical field of ethylthiambutene wastewater purification, and is characterized by the wastewater containing mechanism made of a light-transmitting material, the wastewater catalysis mechanism, and the light source array mechanism arranged around the wastewater containing mechanism. In the working process, the ethylthiambutene production wastewater to be treated is uniformly distributed from the first containing space and the multiple liquid passing holes to the liquid passing channel of the wastewater catalysis mechanism through the pipeline from the external wastewater collecting pool. The light emitting end of the light source array mechanism emits light towards the wastewater containing mechanism to form a catalytic light field in the second containing space, and the wastewater catalysis mechanism is excited in the catalytic light field, so that the medium type of the wastewater does not significantly increase before and after treatment, the problem that the wastewater composition tends to be more complex and the subsequent treatment difficulty increases due to the need to add sufficient or excessive oxidizing agents is avoided, and the process burden of the subsequent desalination or advanced treatment stage is reduced.

Description

Technical Field

[0001] This invention relates to the field of ethyl thiocyanate wastewater purification technology, and particularly to an ethyl thiocyanate wastewater purification device and a purification equipment with an integrated concentration structure. Background Technology

[0002] Ethyl thiocyanate is a key chemical material in industries such as mineral processing. Its preparation processes mainly include the chloroacetic acid method, the dimethyl sulfate method, and the benzyl xanthate method. Existing technologies for preparing ethyl thiocyanate generate large amounts of wastewater containing sulfur-containing organic and inorganic compounds (such as intermediate oxides like sulfides).

[0003] Current technologies for treating sulfur-containing organic compounds typically involve adding oxidants (such as hydrogen peroxide or hypochlorite) to fully oxidize them, converting the sulfur-containing organic compounds into inorganic salts such as sulfates. While this method solves the oxidation and detoxification problems of sulfur-containing organic compounds, the addition of sufficient or excessive amounts of oxidants is usually necessary to ensure complete oxidation of both the sulfur-containing organic compounds and inorganic substances. This results in the introduction of even more types of media into the wastewater, which originally contained multiple types of media to be treated, thus increasing the difficulty of wastewater treatment. Summary of the Invention

[0004] The main objective of this invention is to propose a purification device for ethyl thiocyanate wastewater and a purification equipment with an integrated concentration structure. This invention aims to solve the technical problem that in the process of adding oxidant, in order to ensure the full oxidation of sulfur-containing organic and inorganic substances, sufficient or excessive amounts of oxidant are usually required. This results in the addition of even more types of media into the wastewater that originally contained multiple types of media to be treated, thus increasing the difficulty of wastewater treatment.

[0005] To achieve the above objectives, in a first aspect, the present invention provides an ethyl thiocyanate wastewater purification device, comprising: A wastewater containment mechanism is made of a light-transmitting material. The wastewater containment mechanism has a first containment space for storing water and a second containment space formed inside the first containment space. A plurality of liquid passage holes are formed between the second containment space and the first containment space, all of which are connected to the first containment space. The top of the first containment space is connected to an external wastewater collection tank through a pipe, and the second containment space is connected to an external treatment tank through a pipe. A wastewater catalytic mechanism, wherein the wastewater catalytic mechanism is installed within the second accommodating space, and a liquid passage is formed within the wastewater catalytic mechanism, the liquid passage being sealed and connected to all the liquid passage holes; and... A light source array mechanism is arranged around the outer periphery of the wastewater containing mechanism. The light-emitting ends of the light source array mechanism are all arranged facing the wastewater containing mechanism, and the light source array mechanism can emit light towards the wastewater containing mechanism to form a catalytic light field in the second containing space. The wastewater catalytic mechanism can catalytically oxidize sulfur-containing organic matter dissolved in the wastewater into sulfate in the catalytic light field.

[0006] The technical solution of this invention involves setting up a wastewater containing mechanism made of light-transmitting material, a wastewater catalytic mechanism installed inside a second containing space, and a light source array mechanism surrounding the wastewater containing mechanism. During operation, the ethyl thiocyanate production wastewater to be treated is sent from an external wastewater collection tank through a pipeline to the top of the first containing space. The wastewater in the first containing space is evenly distributed into the liquid passage of the wastewater catalytic mechanism through multiple liquid passage holes opened on the wall of the second containing space. At this time, the light-emitting end of the light source array mechanism emits light towards the wastewater containing mechanism. The light penetrates the light-transmitting material and enters the second containing space, forming a catalytic light field. The wastewater catalytic mechanism is excited in this catalytic light field, generating active species with strong oxidizing ability. The active species come into full contact with the wastewater flowing through the liquid passage, directly catalytically oxidizing the sulfur-containing organic matter dissolved in the wastewater into sulfate. The treated wastewater is then discharged from the second containing space through a pipeline to an external treatment tank. Throughout the oxidation process, the degradation of sulfur-containing organic matter is entirely accomplished through photocatalysis, eliminating the need to add chemical oxidants such as hydrogen peroxide and hypochlorite to the wastewater. Consequently, no additional impurities such as sodium ions and chloride ions are introduced into the wastewater, ensuring that the types of media in the wastewater do not increase significantly before and after treatment. This effectively avoids the problem in existing technologies where the addition of sufficient or excessive amounts of oxidants leads to more complex wastewater composition and increased difficulty in subsequent treatment, and significantly reduces the process burden in subsequent desalination or deep treatment stages. Meanwhile, the water distribution structure, which combines the first containment space with multiple liquid passage holes, allows wastewater to enter the liquid passage of the wastewater catalytic mechanism in a balanced manner at multiple points. This increases the contact area and uniformity between the wastewater and the photocatalytic active surface, which is beneficial to improving the catalytic oxidation efficiency of sulfur-containing organic compounds. Furthermore, the configuration of the first containment space surrounding the second containment space ensures that the incident light passes through the wastewater layer in the first containment space before reaching the catalytic region. This water layer plays a role in uniformly distributing the light, which helps to distribute the catalytic light field more evenly in the second containment space, further improving the light energy utilization efficiency and ensuring that the sulfur-containing organic compounds can still be fully oxidized and detoxified without the addition of external oxidants. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0008] Figure 1 This is a schematic diagram of the ethyl thiocyanate wastewater purification device provided by the present invention; Figure 2 for Figure 1 A schematic diagram of the internal structure of the wastewater containment mechanism in the example; Figure 3 for Figure 2 The diagram shows the structure of the first and second housings of the wastewater containment mechanism in the example. Figure 4 for Figure 2 A schematic diagram of the wastewater catalytic mechanism in the example; Figure 5 for Figure 4 A schematic diagram of the internal structure of the wastewater catalytic mechanism in the example; Figure 6 This is a schematic diagram of the purification device with an integrated concentration structure, as exemplified by the present invention. Figure 7 for Figure 6 A schematic diagram of the concentration mechanism in the example; Figure 8 for Figure 7 The diagram shows the structure of the heating component in the example. Attached image description: 100. Wastewater containment mechanism; 110. First containment space; 120. Second containment space; 130. Liquid passage hole; 200. Wastewater catalytic mechanism; 300. Light source array mechanism; 210. Connecting component; 220. Wastewater catalytic component; 211. Base; 212. Connecting assembly; 213. Flexible connecting cover; 214. Insert rod; 215. Spring bar; 221. Outer shell; 222. Titanium dioxide catalytic column; 223. Titanium dioxide enrichment layer; 140, first shell; 150, first water inlet; 160, second shell; 170, exhaust pipe; 10, base frame; 20, ethyl thiocyanate wastewater purification device; 30, concentration mechanism; 31, third shell; 32, fourth shell; 33, wastewater concentration space; 34, medium containing chamber; 35, heating component; 36, heat-conducting component; 37, mounting plate; 38, electric heating module; 39, sealing heat-conducting sleeve.

[0010] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0011] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0012] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0013] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0014] This invention proposes a purification device for ethyl thiocyanate wastewater and a purification equipment with an integrated concentration structure.

[0015] Please see Figures 1 to 8 For ease of understanding, this ethyl thiocyanate wastewater purification device includes: Wastewater containment mechanism 100 is made of light-transmitting material. The wastewater containment mechanism 100 has a first containment space 110 for storing water and a second containment space 120 formed inside the first containment space 110. A plurality of liquid passage holes 130 are formed between the second containment space 120 and the first containment space 110, all of which are connected to the first containment space 110. The top of the first containment space 110 is connected to an external wastewater collection tank through a pipe, and the second containment space 120 is connected to an external treatment tank through a pipe. Wastewater catalytic unit 200 is installed within the second receiving space 120. A liquid passage is formed within the wastewater catalytic unit 200, and the liquid passage is sealed and connected to all liquid passage holes 130; and... The light source array mechanism 300 is arranged around the outer periphery of the wastewater containing mechanism 100. The light-emitting ends of the light source array mechanism 300 are all arranged facing the wastewater containing mechanism 100, and the light source array mechanism 300 can emit light towards the wastewater containing mechanism 100 to form a catalytic light field in the second containing space 120. The wastewater catalytic mechanism 200 can catalytically oxidize the sulfur-containing organic matter dissolved in the wastewater into sulfate in the catalytic light field.

[0016] Specifically, the wastewater containment structure 100 is made of high-transmittance quartz glass and has a concentric cylindrical structure. The inner cylinder forms the second containment space 120, and the annular area between the outer cylinder and the inner cylinder forms the first containment space 110. Multiple rows of liquid passage holes 130 are evenly distributed on the annular bottom plate of the first containment space 110. Each row of liquid passage holes 130 is distributed circumferentially and communicates with the second containment space 120. The top of the first containment space 110 is connected to an external ethyl thiocyanate production wastewater collection tank via an inlet pipe, and the bottom center of the second containment space 120 is connected to an external treatment tank via a drain pipe.

[0017] The light source array mechanism 300 includes multiple vertically arranged UVA-LED lamp panels, which are arranged concentrically around the outer periphery of the wastewater containing mechanism 100. The light-emitting surface of each lamp panel faces the central axis of the wastewater containing mechanism 100, and the light-emitting wavelength of all LED chips is controlled within the range of 365nm±5nm, thereby forming a uniform catalytic light field within the second containing space 120.

[0018] This application addresses the technical problem in the prior art where the addition of sufficient or excessive chemical oxidants leads to a further increase in the types of media in wastewater and a significant increase in treatment difficulty. It provides an ethyl thiocyanate wastewater purification device 20 that can catalytically oxidize sulfur-containing organic matter into sulfates without adding any chemical oxidants. In this embodiment, when wastewater containing ethyl thiocyanate production wastewater is continuously injected into the first containing space 110 through a pipeline, the wastewater first fills the entire first containing space 110. Since the first containing space 110 and the second containing space 120 are connected by multiple liquid passage holes 130, and the liquid passage holes 130 and the liquid passage channel within the wastewater catalytic mechanism 200 form a unique sealed flow path, the wastewater can only enter the liquid passage channel of the wastewater catalytic mechanism 200 through the liquid passage holes 130. As the wastewater slowly flows through the liquid channel, the light source array mechanism 300 surrounding the wastewater containing mechanism 100 continuously emits ultraviolet light. After the ultraviolet light penetrates the high-transmittance quartz glass wall, it forms a high-intensity catalytic light field in the second containing space 120.

[0019] Under the influence of a catalytic light field, the TiO2-transition metal composite oxide photocatalyst supported on the inner wall of the liquid channel is excited to generate electron-hole pairs. The holes react with water molecules to generate highly oxidizing hydroxyl radicals (·OH). These hydroxyl radicals gradually oxidize sulfur-containing organic compounds dissolved in wastewater (such as ethyl thiocyanate molecules and their derivatives), first breaking the CS bond, and then deeply oxidizing sulfur to sulfate ions (SO4²⁻). - Since the entire oxidation process relies entirely on highly active oxide species generated by photocatalysis, rather than external chemical oxidants, it does not introduce new ion species into the wastewater, thus fundamentally avoiding the problem of increased treatment difficulty caused by excessive addition of oxidants in existing technologies.

[0020] Of course, the wastewater containment structure 100 can also be made of borosilicate glass (Pyrex glass), with a light transmission band covering 300-800nm, which can effectively transmit the ultraviolet light and visible light auxiliary light required for catalysis. In this case, in addition to using 365nm main wavelength LEDs, the light source array structure 300 can also be equipped with 420nm wavelength visible light LEDs to excite modified photocatalysts that respond to visible light (such as N-doped TiO2 or Bi2WO6), forming an ultraviolet-visible composite catalytic light field, further improving the degradation efficiency of complex sulfur-containing organic compounds.

[0021] In another embodiment, the wastewater containment mechanism 100 can also be made of transparent engineering plastic (modified polymethyl methacrylate, PMMA) with a nano-anti-reflective coating. This material significantly reduces the weight of the device while ensuring high light transmittance. Correspondingly, the light source array mechanism 300 adopts an adjustable power UVB-LED array (peak wavelength 310nm). By adjusting the combination of different power segments, a gradient-distributed catalytic light field is formed within the second containment space 120, so that the wastewater can obtain the most suitable catalytic light intensity at different heights as it flows through the liquid channel, ensuring that sulfur-containing organic matter is fully oxidized to sulfate.

[0022] It can be further clarified that, in this embodiment, by setting up a wastewater containing mechanism 100 made of light-transmitting material, a wastewater catalytic mechanism 200 installed inside the second containing space 120, and a light source array mechanism 300 surrounding the wastewater containing mechanism 100, during operation, the ethyl thiocyanate production wastewater to be treated is sent from the external wastewater collection tank through a pipeline to the top of the first containing space 110. The wastewater entering the first containing space 110 is evenly distributed through multiple liquid passage holes 130 opened on the wall of the second containing space 120. The light is directed into the liquid passage of the wastewater catalytic unit 200. At this time, the light-emitting end of the light source array unit 300 emits light towards the wastewater containing unit 100. The light penetrates the light-transmitting material and enters the second containing space 120, forming a catalytic light field in the second containing space 120. The wastewater catalytic unit 200 is excited in the catalytic light field, generating active species with strong oxidizing ability. The active species come into full contact with the wastewater flowing through the liquid passage, directly catalytically oxidizing the sulfur-containing organic matter dissolved in the wastewater into sulfate. The treated wastewater is discharged from the second containing space 120 to the external treatment tank through the pipeline. Throughout the oxidation process, the degradation of sulfur-containing organic matter is entirely accomplished through photocatalysis, eliminating the need to add chemical oxidants such as hydrogen peroxide and hypochlorite to the wastewater. Consequently, no additional impurities such as sodium ions and chloride ions are introduced into the wastewater, ensuring that the types of media in the wastewater do not increase significantly before and after treatment. This effectively avoids the problem in existing technologies where the addition of sufficient or excessive amounts of oxidants leads to more complex wastewater composition and increased difficulty in subsequent treatment, and significantly reduces the process burden in subsequent desalination or deep treatment stages. Meanwhile, the water distribution structure of the first containing space 110 and multiple liquid passage holes 130 allows wastewater to enter the liquid passage of the wastewater catalytic mechanism 200 in a multi-point balanced manner, increasing the contact area and contact uniformity between the wastewater and the photocatalytic active surface, which is beneficial to improving the catalytic oxidation efficiency of sulfur-containing organic matter. Furthermore, the configuration of the first containing space 110 surrounding the second containing space 120 allows the incident light to pass through the wastewater layer in the first containing space 110 before reaching the catalytic region. This water layer plays a role in uniformly distributing the light, which helps the catalytic light field to be more evenly distributed in the second containing space 120, further improving the light energy utilization efficiency and ensuring that the full oxidation and detoxification of sulfur-containing organic matter can still be achieved without the addition of external oxidants.

[0023] In one embodiment, the wastewater catalytic mechanism 200 has a plurality of spaced installation positions on the side facing the second receiving space 120, and a plurality of liquid passage holes 130 are formed on each installation position. The liquid passage holes 130 on the same installation position are spaced vertically. Wastewater catalytic unit 200 includes: Multiple connecting parts 210, the number of connecting parts 210 matching the number of installation positions and arranged in a one-to-one correspondence; and, Multiple wastewater catalytic components 220, each of which is equipped with at least one connecting component 210; When the wastewater catalytic component 220 performs photocatalytic operation on the wastewater, the connecting component 210 can switch from a first connection state to a second connection state, and in the second connection state, the connecting component 210 can make the corresponding wastewater catalytic component 220 fit tightly against the corresponding installation position.

[0024] Specifically, the outer peripheral wall of the wastewater catalytic device 200 facing the second receiving space 120 can be formed with eight circumferentially evenly spaced installation positions. Four rows of liquid passage holes 130 are vertically spaced on the bottom surface of each installation position, so that wastewater can enter the subsequent catalytic reaction zone from the first receiving space 110 through these liquid passage holes 130.

[0025] The wastewater catalytic mechanism 200 further includes eight connecting components 210 and eight wastewater catalytic components 220. The number of connecting components 210 corresponds to the number of installation positions and they are arranged one-to-one. The number of wastewater catalytic components 220 corresponds to the number of connecting components 210 and they are connected one-to-one. Each wastewater catalytic component 220 is a honeycomb ceramic catalytic plate loaded with anatase TiO2 and Cu-Fe bimetallic oxides, with a catalytic active surface and an installation back surface on both sides.

[0026] When wastewater enters from the external wastewater collection tank through the pipeline and fills the first containment space 110, the wastewater will permeate into the second containment space 120 through the liquid passage hole 130 at the installation position. At this time, the connecting component 210, which is initially in the first connection state, keeps the wastewater catalytic component 220 in a suspended position 5-8 mm away from the bottom surface of the installation position. After the wastewater flows out from the liquid passage hole 130, it first forms a thin water film between the catalytic component and the installation position, and then enters the honeycomb liquid passage channel of the wastewater catalytic component 220.

[0027] In the second connection state, the mounting back of the wastewater catalytic component 220 is tightly pressed against the bottom surface of the mounting position. At this time, all liquid passage holes 130 are completely aligned and sealed with the honeycomb channel inlet of the wastewater catalytic component 220, forcing all wastewater to pass vertically through the filter media layer in order to continue flowing downward.

[0028] In this embodiment, when the wastewater catalytic component 220 performs photocatalytic operation, the connecting component 210 can reliably switch from the first connection state to the second connection state, ensuring that the catalytic component is tightly attached to the installation position. This process ensures sufficient contact between the wastewater and the catalytic active surface, while avoiding bypass short-flow between the catalyst and the wastewater. As can be seen from the embodiment, when the catalytic component is in the second connection state, the residence time of the wastewater in the honeycomb channel is extended by 2.7 times compared to the suspended state, and the oxidation efficiency of sulfur-containing organic matter increases from 71% to over 94%. Moreover, the entire process does not require the addition of any chemical oxidant, thus avoiding the problem of increasing the types of media at the source.

[0029] In one embodiment, the connecting member 210 includes: Multiple bases 211 are connected to the wastewater containing mechanism 100. All bases 211 are located within the second containing space 120, and all bases 211 and liquid passage holes 130 at the same installation position are distributed vertically at intervals. Multiple connecting components 212, the number of which is the same as the number of bases 211, are installed one-to-one on the side of the base 211 facing the second receiving space 120. All connecting components 212 can be connected to the corresponding wastewater catalytic component 220 and are in a first connection state; and, Multiple flexible connecting covers 213 are provided, with the number of flexible connecting covers 213 being the same as that of the base 211 and corresponding to each other, surrounding the outer periphery of the corresponding installation position. Each flexible connecting cover 213 can be sealed and connected to the corresponding wastewater catalytic component 220. The wastewater in the second receiving space 120 can squeeze the flexible connecting cover 213 to fit against the outer wall of the second receiving space 120 and be in a second connection state.

[0030] Specifically, in the initial stage, the connecting component 212 puts the wastewater catalytic component 220 in a first connected state, allowing wastewater to flow out from the liquid passage 130 and first form a buffer water layer between the catalytic component and the installation position. As the water level and flow rate in the second containing space 120 rise, the wastewater exerts a continuous radial pressure on the outer surface of the flexible connecting cover 213. This pressure forces the flexible connecting cover 213 to expand outward and gradually adhere to the outer wall of the second containing space 120, i.e., the inner wall of the inner cylinder of the wastewater containing mechanism 100. During the process of the flexible connecting cover 213 being fully compressed and adhered, its sealed connection with the wastewater catalytic component 220 drives the catalytic component to move synchronously towards the installation position until the catalytic active surface of the catalytic component is completely pressed against the bottom surface of the installation position, achieving the second connected state. At this time, all the outlets of the liquid passage 130 and the inlets of the honeycomb channels of the wastewater catalytic component 220 are aligned without gaps, forcing all wastewater to pass through the filter layer before flowing into the liquid passage.

[0031] In this embodiment, after the light source array mechanism 300 establishes a catalytic light field within the second accommodating space 120, the sulfur-containing organic matter in the wastewater comes into full contact with the TiO2-based composite catalyst loaded on the inner wall of the channel as it passes through the filter media layer. The hydroxyl radicals deeply oxidize the sulfur-containing organic matter into sulfate. Since the flexible connecting cover 213 utilizes the static and dynamic pressure of the wastewater within the second accommodating space 120 to switch from the first connection state to the second connection state, reliable contact of the catalytic components can be achieved without additional driving energy, thereby ensuring the uniqueness of the wastewater flow path, avoiding bypass short-circuiting, and eliminating new media pollution caused by the addition of chemical oxidants.

[0032] In another embodiment, the flexible connecting cover 213 adopts a three-layer composite structure: an outer layer of corrosion-resistant polytetrafluoroethylene film, a middle layer of highly elastic fluorosilicone rubber core, and an inner layer of thermoplastic polyurethane sealing lip fused to the side of the catalytic component. Each base 211 remains fixedly connected to the wastewater containing mechanism 100. The connecting assembly 212 uses a retractable corrugated connecting rod, and in the first connection state, the catalytic component is suspended in front of the installation position. When the second containing space 120 is filled with water, the flexible connecting cover 213 is uniformly compressed to completely fit the outer wall of the second containing space 120, while simultaneously pulling the connecting assembly 212 to move the catalytic component to the installation position. This embodiment exhibits superior sealing durability when treating high-turbidity wastewater, and the composite structure of the flexible connecting cover 213 effectively resists aging under long-term irradiation by the catalytic light field, ensuring reliable switching of the second connection state during long-term operation.

[0033] In another embodiment, the flexible connecting cover 213 is a pleated capsule structure with reinforcing ribs. All bases 211 are connected to the inner wall of the wastewater containing mechanism 100 via threaded flanges. The connecting assembly 212 is in the form of a ball joint to accommodate small angular deviations. After each flexible connecting cover 213 is installed in its designated position, multiple guide ridges are pre-set on its outer surface to guide the wastewater to apply pressure to the capsule along a specific path. When the wastewater fills the second containing space 120 and forms a stable pressure field, the pleated capsule is fully expanded and tightly adheres to the outer wall of the second containing space 120, pushing the wastewater catalytic component 220 from the first connection state to the second connection state, achieving zero-gap contact between the catalytic active surface and the outlet of the liquid passage 130. This embodiment is suitable for operating conditions with large flow fluctuations. By changing the distribution density of the reinforcing ribs, the compression response speed can be adjusted to ensure the sufficiency of the catalytic reaction under different hydraulic conditions, effectively improving the mineralization rate of sulfur-containing organic matter.

[0034] In one embodiment, the connection component 212 includes: The number of plug-in rods 214 is the same as that of the bases 211, and they are installed one-to-one on the side of the bases 211 facing the second receiving space 120. Each plug-in rod 214 extends horizontally towards the central vertical axis of the second receiving space 120. Each plug-in rod 214 has a receiving cavity extending along its length, and multiple holes are arrayed on its shaft, all of which communicate with the receiving cavities. The spring bar 215 is installed in the receiving cavity. The spring bar 215 protrudes outward from the corresponding hole to form a buckle. The plug rod 214 can be plugged into the wastewater catalytic component 220 so that all the buckles are engaged with the wastewater catalytic component 220.

[0035] Specifically, when the external wastewater collection tank injects sulfur-containing organic wastewater from the production of ethyl thiocyanate into the first containment space 110 through a pipeline, the wastewater fills the first containment space 110 and then enters the second containment space 120 through the liquid passage 130. At this time, the plug-in rod 214 extends horizontally from the base 211 and is inserted into the corresponding plug-in hole of the wastewater catalytic component 220. Due to the elastic restoring force, the multiple clips on the elastic strip 215 installed in the containment cavity protrude outward from the holes and are sequentially engaged in the preset engagement grooves of the wastewater catalytic component 220, thereby stably connecting the wastewater catalytic component 220 to the first connection state and maintaining a uniform gap between the catalytic component and the bottom surface of the installation position. As the wastewater level rises in the second containment space 120, the flexible connecting cover 213 expands outward under the pressure of the wastewater and adheres to the outer wall of the second containment space 120. During this process, the flexible connecting cover 213 drives the wastewater catalytic component 220, which is connected by the plug-in rod 214 and the snap-fit, to move synchronously to the installation position until the catalytic active surface is completely attached to the installation position and enters the second connection state. At this time, all liquid passage holes 130 and the honeycomb liquid passage inlet of the wastewater catalytic component 220 are precisely aligned and sealed.

[0036] After the catalytic light field is established, the wastewater must pass through the filter media layer in sequence before entering the liquid passage. The snap-fit ​​structure of the spring bar 215 on the plug rod 214 ensures the connection reliability of the wastewater catalytic component 220 during the process of switching from the first connection state to the second connection state, and avoids the catalytic component from shifting or falling off under the impact of water flow.

[0037] Of course, the plug-in rod 214 is preferably integrally injection molded from polyetheretherketone (PEEK) engineering plastic. Its inner wall has an axial guide groove, and the spring strip 215 is a high-carbon stainless steel multi-tooth spring. Each snap-fit ​​has a wedge-shaped structure to accommodate wastewater catalytic components 220 of different thicknesses. In the first connection state, after the plug-in rod 214 is horizontally inserted into the catalytic component's insertion hole, the wedge-shaped snap-fit ​​on the spring strip 215 precisely pops out through the guide groove and snaps into the trapezoidal groove on the side wall of the catalytic component, achieving bidirectional positioning. When the flexible connecting cover 213 is pressed, causing the catalytic component to move towards the installation position, the inclined structure of the wedge-shaped snap-fit ​​allows the catalytic component to make slight translations while maintaining a reliable connection, ensuring that the catalytic active surface can completely conform to the array of liquid passage holes 130 at the installation position.

[0038] In another embodiment, the rod body of the plug-in rod 214 is made of 316L stainless steel tubing, and an axially sliding elastic bar 215 limiting block is provided inside the receiving cavity. The elastic bar 215 is made of phosphor bronze alloy. After the base 211 is fixed to the inner wall of the wastewater receiving mechanism 100 by a flange, the plug-in rod 214 extends horizontally to accommodate a second receiving space 120 with a larger diameter. In the first connection state, the ball head buckle on the elastic bar 215 protrudes evenly from the hole and makes point contact with the hemispherical recess on the wastewater catalytic component 220. When the wastewater pressure in the second receiving space 120 reaches a set value, the flexible connecting cover 213 pushes the catalytic component to move horizontally, and the ball head buckle slightly retracts in the receiving cavity and then pops out again, ensuring that the connecting assembly 212 always maintains a reliable grip on the catalytic component throughout the entire switching process.

[0039] In one embodiment, the flexible connecting cover 213 is made of a transparent material.

[0040] Specifically, when the external wastewater collection tank injects ethyl thiocyanate production wastewater into the first containing space 110 through a pipeline, the wastewater first fills the first containing space 110, and then enters the second containing space 120 through the liquid passage 130 at the installation position. In the initial stage, the connecting component 212 puts the wastewater catalytic component 220 in a first connected state, and the wastewater forms a buffer flow between the catalytic component and the installation position. As the water level continues to rise, the wastewater generates radial extrusion force on the outer surface of the flexible connecting cover 213. This pressure causes the transparent flexible connecting cover 213 to gradually expand and eventually adhere to the inner wall of the second containing space 120. During this expansion process, the flexible connecting cover 213 drives the catalytic component to move synchronously through the sealed connection with the wastewater catalytic component 220 until the catalytic active surface is completely adhered to the bottom surface of the installation position, entering the second connected state. At this time, the ultraviolet light emitted by the light source array mechanism 300 penetrates the outer cylinder wall of the wastewater containing mechanism 100 and the transparent flexible connecting cover 213 in sequence, and enters the honeycomb liquid passage of the wastewater catalytic component 220, forming a higher intensity catalytic light field in the passage.

[0041] This application addresses the technical problem in existing technologies where sufficient or excessive amounts of chemical oxidants are required to ensure the complete oxidation of sulfur-containing organic matter, leading to the addition of various media types in the wastewater and significantly increasing the difficulty of subsequent treatment. The application provides the aforementioned flexible connecting cover 213 structure made of transparent material. During the catalytic operation, the transparent flexible connecting cover 213 allows the 365nm ultraviolet light emitted by the light source array 300 to penetrate the cover with minimal attenuation and directly irradiate the catalyst surface and the wastewater fluid, exciting the generation of higher concentrations of hydroxyl radicals. This enables the sulfur-containing organic matter dissolved in the wastewater to be gradually oxidized, its bonds broken, and ultimately converted into sulfates.

[0042] Of course, the flexible connecting cover 213 can be made of a composite transparent material of quartz glass film with a light transmittance of up to 95% and fluorinated ethylene propylene copolymer (FEP). The outer layer is an FEP film to provide the necessary flexibility and corrosion resistance, and the inner layer is a quartz glass reinforcing layer to improve ultraviolet light transmittance. Each base 211 is still fixedly connected to the inner wall of the wastewater containing mechanism 100, and the connecting component 212 maintains the first connection state through the plug rod 214 and the spring strip 215. When the second containing space 120 is filled with wastewater, the composite transparent flexible connecting cover 213 is squeezed and completely adheres to the inner wall of the second containing space 120, pushing the wastewater catalytic component 220 into the second connection state.

[0043] In another embodiment, the flexible connecting cover 213 is made of a transparent elastomer material with high light transmittance polymethyl methacrylate (PMMA) and a nano-silica modified layer, and a microstructure anti-reflection texture is provided on the surface to further reduce reflection loss. All bases 211 are connected to the inner cylinder of the wastewater containing mechanism 100 via flanges, and the plug-in rod 214 extends horizontally and is secured to the wastewater catalytic component 220 via a spring clip 215 to form a stable fit. When the wastewater fills the second containing space 120 and forms a stable pressure field, the transparent flexible connecting cover 213 smoothly unfolds under the squeezing action and fits against the inner wall, driving the catalytic component to complete the switch from the first connection state to the second connection state. In this embodiment, the catalytic light field retains its initial intensity after penetrating the cover, and can maintain a high-efficiency catalytic effect even when dealing with conditions with large flow fluctuations, eliminating the problem of additional media pollution caused by excessive use of oxidant in the prior art from the source.

[0044] In one embodiment, the wastewater catalytic component 220 includes: The outer casing 221 is made of a light-transmitting material. One end of the outer casing 221 is a connecting end, on which liquid guide tubes are formed, corresponding one-to-one with the liquid passage holes 130 at the corresponding installation positions. The liquid guide tubes are sealed to the walls of the liquid passage holes 130. The outer casing 221 contains placement chambers communicating with all the liquid passage holes 130, and also has multiple channels communicating with these placement chambers. Titanium dioxide catalytic column 222 is placed in the placement chamber. The titanium dioxide catalytic column 222 has a honeycomb-like structure. Wastewater in the first containment space 110 can flow into the placement chamber through the liquid hole 130 and into the second containment space 120, so that when the second containment space 120 is in the catalytic light field, the sulfur-containing organic matter dissolved in the wastewater will be catalytically oxidized into sulfate.

[0045] Specifically, the sealed fit between the liquid guide tube and the wall of the liquid passage 130 ensures that all wastewater enters the placement chamber of the outer shell 221. The wastewater is then evenly distributed within the chamber and flows through the channels of the honeycomb-like titanium dioxide catalytic column 222. When the second containment space 120 is under a catalytic light field, ultraviolet light penetrates the outer shell 221 and irradiates the surface of the catalytic column, exciting the generation of hydroxyl radicals. These radicals gradually oxidize and break the bonds of sulfur-containing organic matter dissolved in the wastewater, ultimately generating sulfates which flow into the second containment space 120 through multiple channels on the outer shell 221.

[0046] During the catalytic operation, the outer shell 221, through a precise seal between the liquid guide pipe and the liquid passage 130, forces all wastewater to flow through the honeycomb-like channels of the titanium dioxide catalytic column 222, avoiding bypass short-flow. Under the action of the catalytic light field, the catalytic column continuously generates highly oxidizing active substances, causing sulfur-containing organic matter to be completely mineralized.

[0047] Of course, the outer shell 221 is integrally sintered from high-transmittance borosilicate glass material, and the connecting end is equipped with eight liquid guide tubes. Each liquid guide tube has a 45° chamfer at the end to facilitate quick alignment and insertion with the liquid passage hole 130 and form a compression seal. The titanium dioxide catalyst column 222 has a hexagonal honeycomb structure, and the wall surface is loaded with nitrogen-doped titanium dioxide and copper-iron composite oxide. In the first connection state, the wastewater catalyst component 220 is suspended in front of the installation position, and wastewater can enter the placement chamber through the tiny gap between the liquid guide tube and the liquid passage hole 130; when the flexible connecting cover 213 is squeezed by the wastewater and drives the catalyst component into the second connection state, the liquid guide tube and the wall of the liquid passage hole 130 form a zero-gap seal, forcing all the wastewater to pass vertically through the filter column.

[0048] In another embodiment, the outer shell 221 is injection molded from high-transmittance polyethersulfone engineering plastic, and the connecting end is provided with twelve liquid guiding tubes with fluororubber O-rings embedded at the tube openings to enhance sealing reliability. The titanium dioxide catalytic column 222 adopts a gradient pore size honeycomb structure, and is internally loaded with a silver-modified titanium dioxide nanotube array. After the base 211 is fixedly connected to the inner wall of the wastewater containing mechanism 100, the plug rod 214 securely connects the catalytic components through the spring strip 215. When a stable catalytic light field is formed in the second containing space 120, ultraviolet light penetrates the transparent outer shell 221 and undergoes multiple reflections within the gradient channels, further improving light utilization.

[0049] In one embodiment, a titanium dioxide enrichment layer 223 is formed on the outer surface of the outer shell 221. The titanium dioxide enrichment layer 223 avoids the placement chamber and is distributed in a spot-like manner on the outer surface of the outer shell 221.

[0050] Specifically, when the external wastewater collection tank injects ethyl thiocyanate production wastewater into the first containment space 110 through a pipeline, the wastewater fills the first containment space 110 and then enters the liquid guide pipe through the liquid passage hole 130 at the installation position. After the liquid guide pipe and the wall of the liquid passage hole 130 are sealed together, all the wastewater enters the placement chamber and passes through the filter column. In the second connection state, the flexible connecting cover 213 is squeezed and adhered to the outer wall of the second containment space 120 by the wastewater. At this time, the speckled titanium dioxide enrichment layer 223 formed on the outer surface of the outer shell 221 is directly exposed to the catalytic light field. The ultraviolet light emitted by the light source array mechanism 300 penetrates the cylinder wall of the wastewater containment mechanism 100 and the transparent flexible connecting cover 213 in sequence and then irradiates the titanium dioxide enrichment layer 223 on the outer surface of the outer shell 221, exciting the generation of a large number of hydroxyl radicals. These active substances, along with the flow of wastewater in the second containment space 120, further undergo a secondary catalytic oxidation reaction with the initially oxidized sulfur-containing organic matter.

[0051] During the catalytic process, the titanium dioxide enriched layer 223 is positioned within the placement chamber to avoid interference with the internal catalytic column, while its speckled distribution ensures uniform illumination of light in each area.

[0052] In an optional embodiment, the titanium dioxide enrichment layer 223 formed on the outer surface of the outer shell 221 is loaded using a sol-gel method, and the spots contain nitrogen-doped titanium dioxide and zinc oxide composite particles. The outer shell 221 is still made of a high-transmittance material, and the connection end is sealed and plugged into the liquid passage 130 through a liquid guide tube. In the first connection state, the wastewater catalytic component 220 is suspended in front of the installation position; when the wastewater pressure in the second containment space 120 increases, causing the flexible connection cover 213 to push the catalytic component into the second connection state, the spot-like enrichment layer on the outer surface is completely within the catalytic light field.

[0053] In another embodiment, the titanium dioxide enrichment layer 223 is formed by magnetron sputtering, with irregularly elliptical spots. The enrichment layer is a mixed crystal form of rutile and anatase titanium dioxide. After the base 211 is fixedly connected to the inner wall of the wastewater containing mechanism 100, the plug-in rod 214 is stably connected to the wastewater catalytic component 220 via a snap fastener on the spring strip 215. When the wastewater fills the second containing space 120 and pushes the flexible connecting cover 213 to completely fit the inner wall, the spot-like enrichment layer on the outer surface of the outer shell 221 forms the optimal irradiation angle with the catalytic light field. The ultraviolet light undergoes multiple diffuse reflections in the spot area, further improving the photon utilization efficiency.

[0054] In one embodiment, the light source array mechanism 300 includes multiple ultraviolet light emission modules. All ultraviolet light emission modules are arranged in a ring array on the outer periphery of the wastewater containing mechanism 100. All ultraviolet light emission modules are electrically connected to an external point cloud. The light emission ends of the ultraviolet light emission modules are all arranged facing the second containing space 120, and a catalytic light field that can penetrate the second containing space 120 is formed on the outer periphery of the wastewater containing mechanism 100.

[0055] Specifically, wastewater sequentially fills the first containment space 110, enters the placement chamber of the wastewater catalytic component 220 through the liquid passage 130 at the installation position, flows through the honeycomb-like titanium dioxide catalytic column 222, and then enters the second containment space 120. At this time, an external point cloud power supply powers all ultraviolet light emission modules. The 365nm ultraviolet light emitted by the light emission end of each module penetrates the light-transmitting cylindrical wall, the transparent flexible connecting cover 213, and the outer shell 221 of the wastewater containment mechanism 100, and simultaneously irradiates the titanium dioxide catalytic column 222 in the placement chamber, the spot-like titanium dioxide enrichment layer 223 on the outer surface of the outer shell 221, and the wastewater in the second containment space 120, forming a uniform and penetrating catalytic light field throughout the entire second containment space 120.

[0056] During the catalytic operation, all ultraviolet light emission modules are activated simultaneously to form a closed catalytic light field surrounding the second containment space 120. The ultraviolet light can penetrate the cylinder wall of the wastewater containment mechanism 100 and the flexible connecting cover 213 from multiple angles, fully activating the internal catalytic column and the outer surface enrichment layer.

[0057] In an optional embodiment, the ultraviolet light emission module adopts a hybrid array of 254nm UVC-LEDs and 365nm UVA-LEDs. Each module contains 36 LED beads, and a total of 32 modules are arranged in a ring array. The spacing between adjacent modules is 28mm. All modules are synchronously switched on and off via waterproof connectors and external point-source power supplies. In the first connection state, the wastewater catalytic component 220 is suspended in front of the installation position, and the catalytic light field is initially established. When the wastewater pressure in the second containment space 120 increases, it pushes the flexible connecting cover 213 to drive the catalytic component into the second connection state. The mixed wavelength light simultaneously penetrates the cylinder wall of the wastewater containment mechanism 100, the outer shell 221, and the transparent flexible connecting cover 213, forming a high-intensity, broadband penetrating catalytic light field in the second containment space 120.

[0058] In another embodiment, the ultraviolet light emission module uses a composite light source with a wavelength of 310nm UVB-LED and 385nm UVA-LED. Each module has a power of 60W. The ring array is arranged in three layers along the axial direction of the wastewater containing mechanism 100, with a total of 48 modules. The modules in each layer are staggered to eliminate irradiation dead angles. All modules are electrically connected to the external point cloud via shielded cables. After the base 211 is fixedly connected to the inner wall of the wastewater containing mechanism 100, the plug rod 214 reliably connects the wastewater catalytic component 220 through the buckle on the spring strip 215. When the wastewater fills the second containing space 120 and the flexible connecting cover 213 is completely attached to the inner wall, the catalytic light field formed by the multi-layer ring array achieves uniform coverage in both the axial and radial directions. After the ultraviolet light penetrates the outer shell 221, it simultaneously activates the internal honeycomb-like catalytic columns and the spot-like titanium dioxide enrichment layer 223 on the outer surface.

[0059] In one embodiment, the wastewater containment mechanism 100 includes: The first housing 140 is made of a light-transmitting material. A first water inlet 150 is formed on the top of the first housing 140. The first water inlet 150 is connected to an external wastewater collection tank through a pipe. The inner wall of the first housing 140 encloses a first accommodating space 110. The second housing 160, made of a light-transmitting material, is installed within the first receiving space 110. The first receiving space 110 is formed between the outer wall of the second housing 160 and the inner wall of the first housing 140. The inner wall of the second housing 160 encloses a second receiving space 120. Multiple liquid passage holes 130 are arrayed on the second housing 160. A wastewater catalytic mechanism 200 is installed on the inner wall of the second housing 160. A connecting pipe, isolated from the first receiving space 110, is installed at the bottom of the second housing 160 and connects to an external treatment tank. The exhaust pipe 170 passes through the first housing 140, the first receiving space 110 and the second housing 160 in sequence and extends to the top of the second receiving space 120. The exhaust pipe 170 is sealed with the first housing 140 and the second housing 160 to discharge the gas generated in the second receiving space 120 to the outside of the first housing 140.

[0060] Specifically, in actual operation, the double-layer light-transmitting structure of the first shell 140 and the second shell 160 not only ensures the multi-angle incident of catalytic light, but also achieves the buffering and distribution of wastewater through the first containment space 110; the exhaust pipe 170 promptly discharges the gas from the top of the second containment space 120 at the initial stage of gas generation, avoiding the adhesion of bubbles on the surface of the catalytic column and the enrichment layer area.

[0061] In an optional embodiment, the first housing 140 is sintered from borosilicate glass with a light transmittance of 94%, and a flow regulating valve is provided at the first inlet 150 to precisely control the water inlet rate. The second housing 160 is also made of borosilicate glass, with the liquid passage holes 130 arranged in a 12×8 rectangular array. The bottom connecting pipe of the second housing 160 adopts a flange isolation structure to ensure complete separation from the first containing space 110. The exhaust pipe 170 is made of quartz glass, and the penetration points are all sealed with fluororubber composite sealing rings to achieve zero leakage. After the wastewater is injected, the first containing space 110 first establishes a stable liquid level, and then the wastewater enters the placement chamber through the liquid guide pipe and flows through the nitrogen-doped titanium dioxide catalyst column 222. When the gas generation rate in the second containing space 120 reaches its peak, the exhaust pipe 170 quickly discharges it, so that the catalytic light field remains in a continuous and efficient activated state under mixed wavelength ultraviolet light irradiation.

[0062] In another embodiment, the first housing 140 is injection molded from high-transmittance polyethersulfone engineering plastic and has an anti-UV coating on its surface; the inner wall of the second housing 160 has a ring-shaped array of liquid passage holes 130, totaling 168 holes, with the pore size gradient gradually changing from the inlet end to the outlet end; the exhaust pipe 170 is made of fluorinated ethylene propylene copolymer pipe, with a porous diffuser on the top extension section to disperse the exhaust gas flow, and is permanently fitted with the first housing 140 and the second housing 160 by a heat-sealing method. When wastewater fills the first containment space 110 and enters the second containment space 120 through the liquid passage holes 130, the speckled titanium dioxide enrichment layer 223 and the internal catalytic column work synchronously in the penetrating catalytic light field, and the gas generated by the reaction is continuously discharged along the path of the exhaust pipe 170, so that the second containment space 120 is always maintained in a negative pressure fine-tuning state.

[0063] It should also be noted that, in order to ensure the wastewater purification efficiency of the ethyl thiocyanate wastewater purification device 20 of the present invention, opening windows are formed on both the first housing 140 and the second housing 160. During the purification stage, the opening windows are in a closed state, and when cleaning operations are required, the opening windows can be opened.

[0064] After a preset running time, the wastewater catalytic unit 200 needs to be cleaned and regenerated. This preset time could be, for example, 3 consecutive days of operation. The specific cleaning cycle can be adjusted according to the concentration of organic matter in the wastewater and the rate of catalyst activity decay. The cleaning operation begins by shutting down the device, followed by opening the outer casing of the wastewater containment unit 100. Since the wastewater containment unit 100 is made of a translucent material, and the wastewater catalytic unit 200 is installed within the second containment space 120 and sealed to the liquid passage 130, the operator can access the assembly position of the wastewater catalytic unit 200 through the opening in the outer casing. After removing the wastewater catalytic unit 200 from the second containment space 120, the titanium dioxide catalytic column 222 inside the wastewater catalytic unit 200 is then extracted from its mounting cavity, separating the titanium dioxide catalytic column 222 from the other components of the wastewater catalytic unit 200. After long-term service, the porous surface of the titanium dioxide catalytic column 222 will accumulate suspended impurities from wastewater and inorganic deposits such as sulfates generated during the catalytic oxidation process. These deposits cover the active surface of the photocatalyst, hindering light from reaching the titanium dioxide particles and reducing the sites for the generation of active species, thereby reducing the catalytic oxidation efficiency. The removed titanium dioxide catalytic column 222 can be subjected to high-temperature calcination, for example, calcining in air at a temperature of 400°C to 550°C for a certain period of time. This allows for the complete pyrolysis and removal of residual organic matter on the surface, while restoring the lattice integrity and surface hydroxyl density of titanium dioxide. Alternatively, ultrasonic cleaning can be used, immersing the titanium dioxide catalytic column 222 in deionized water or a weakly acidic cleaning solution and applying ultrasonic vibration to utilize the cavitation effect to remove surface deposits. After the final cleaning operation, either high-temperature calcination or ultrasonic cleaning, the active surface of the titanium dioxide catalytic column 222 is fully exposed and regenerated, and the catalytic activity is restored to near its initial level. The regenerated titanium dioxide catalyst column 222 is then reinstalled into the wastewater catalytic unit 200, and the wastewater catalytic unit 200 is reinstalled in the second receiving space 120. The outer shell of the wastewater receiving unit 100 is then sealed, and the device can resume operation, continuing to perform catalytic oxidation of sulfur-containing organic matter in the wastewater within the catalytic light field formed by the light source array 300. Through this cleaning and regeneration method, the wastewater catalytic unit 200 does not require complete replacement after long-term operation; only the titanium dioxide catalyst column 222 needs periodic cleaning and restoration. This reduces the operating and maintenance costs of the device and ensures a continuous and stable catalytic oxidation effect.

[0065] Based on the same technical concept, in a second aspect, the present invention also proposes a purification device with an integrated concentration structure, comprising: Base frame 10; The first aspect of the ethyl thiocyanate wastewater purification device 20 includes a light source array mechanism 300 mounted on a base frame 10, and a wastewater containing mechanism 100 connected to the base frame 10 via a connecting bracket; and... The concentration mechanism 30 is installed on the base frame 10 and is located below the wastewater holding mechanism 100. The concentration mechanism 30 is connected to the wastewater holding mechanism 100 through a pipeline. The concentration mechanism 30 can heat and concentrate the wastewater discharged into the concentration mechanism 30.

[0066] Specifically, after the external wastewater collection tank injects ethyl thiocyanate production wastewater into the first inlet 150 through the pipeline, the wastewater sequentially passes through the first containment space 110, the liquid passage 130, and the liquid guide pipe into the placement chamber and flows through the honeycomb-like titanium dioxide catalytic column 222. Within the second containment space 120, it is irradiated by a penetrating catalytic light field, where sulfur-containing organic matter is efficiently oxidized to sulfate. The purified water after the reaction enters the concentration mechanism 30 through the connecting pipe at the bottom of the second shell 160. The concentration mechanism 30 is located directly below the wastewater containment mechanism 100 and is rigidly fixed by the base frame 10. The connecting bracket stably suspends the wastewater containment mechanism 100 on the base frame 10. The concentration mechanism 30 activates its built-in heating unit to continuously heat the incoming purified water, evaporating and concentrating the water in the wastewater. The concentrated high-salt mother liquor is discharged from the bottom of the concentration mechanism 30, while the secondary steam generated by evaporation is condensed and used as process recycled water.

[0067] This application addresses the technical problems in existing technologies where ethyl thiocyanate wastewater, even after photocatalytic oxidation, still contains a high concentration of inorganic salts. Direct discharge of such wastewater leads to resource waste and increases the salinity of receiving water bodies. Separate concentration equipment, on the other hand, suffers from large footprint, high energy consumption, and low system integration. The application provides a purification device with an integrated concentration structure. During operation, the wastewater first undergoes efficient catalytic oxidation within the wastewater receiving unit 100. Subsequently, the purified water flows directly into the concentration unit 30 below for heating and concentration by gravity. As can be seen from the above implementation process, this integrated arrangement allows purified water to enter the concentration stage without additional pumping. The concentration unit 30 utilizes the residual heat from the catalytic reaction to preheat the incoming water, reducing overall energy consumption. Ultimately, it achieves the dual goals of complete mineralization of sulfur-containing organic matter and efficient concentration of inorganic salts, thus solving the problems of resource waste, large footprint, and high energy consumption in existing technologies.

[0068] In an optional embodiment, the concentration mechanism 30 employs a multi-effect falling film evaporator, installed on the lower platform of the base frame 10. The wastewater containment mechanism 100 is rigidly connected to the upper layer of the base frame 10 via four sets of inclined connecting brackets. The multi-effect evaporator is directly connected to the connecting pipe at the bottom of the second shell 160 via a DN80 stainless steel pipe. The heating steam pressure is controlled at 0.35 MPa, and the concentration temperature is maintained at 92-108°C. When the purified water after catalytic oxidation in the second containment space 120 enters the multi-effect evaporator, the first effect is heated by external steam, and the generated secondary steam serves as the heating source for the next effect, thus completing multi-stage concentration in sequence.

[0069] In one embodiment, the concentration mechanism 30 includes: The third housing 31 encloses and forms a medium storage space. Multiple mounting holes are arrayed on the third housing 31 and are connected to the medium storage space. The fourth shell 32 encloses and forms a wastewater concentration space 33. The fourth shell 32 is installed in the medium storage space. The top of the fourth shell 32 is connected to the wastewater containing mechanism 100 through a pipe. A medium containing chamber 34 is formed between the fourth shell 32 and the third shell 31. The medium containing chamber 34 stores a liquid heat-conducting medium. A steam discharge pipe is installed on the top of the fourth shell 32. The steam discharge pipe passes through the medium storage chamber and the third shell 31 in sequence. A slag discharge pipe is provided at the bottom of the fourth shell 32. The slag discharge pipe passes downward through the third shell 31. Multiple heating elements 35 are provided, with the number of heating elements 35 matching the number of mounting holes and sealed one-to-one. The heating ends of all heating elements 35 extend into the medium-containing chamber 34 and are in contact with the heat-conducting medium. All heating elements 35 are electrically connected to an external power supply via external wires. Multiple heat-conducting elements 36 are distributed circumferentially within the wastewater concentration space 33. All heating components 35 are connected to the inner wall of the fourth housing 32. Liquid flow channels are formed within each heating component 35. All liquid flow channels are sealed and connected to the medium receiving chamber 34. The heating components 35 can heat the heat-conducting medium so that the heat carried by the heat-conducting medium can pass through the fourth housing 32 and the heat-conducting elements 36 to heat and evaporate the concentrated wastewater.

[0070] Specifically, triphenylmethane heat transfer oil is selected as the heat transfer medium.

[0071] After the purified wastewater flows from the bottom connecting pipe of the second shell 160 into the wastewater concentration space 33 of the fourth shell 32, the external power supply supplies power to all heating components 35 through external wires. The heating end of the heating component 35 transfers heat to the heat-conducting medium surrounding the medium containing the medium 34. After the temperature of the heat-conducting medium rises, it transfers heat to the wall of the fourth shell 32 and multiple heat-conducting components 36 inserted into the wastewater concentration space 33 through natural convection and forced circulation. After absorbing heat, the temperature of the wastewater rises rapidly to the boiling point. The generated high-temperature steam passes through the medium storage space and the third shell 31 in sequence along the steam discharge pipe and is then discharged to the condensation recovery system. The concentrated high-salt slurry is periodically discharged through the bottom slag discharge pipe.

[0072] In actual operation, the purified water from the wastewater containment mechanism 100 first enters the wastewater concentration space 33 enclosed by the fourth shell 32. The heating component 35 only indirectly heats the heat-conducting medium in the medium containment chamber 34. The heat-conducting medium then evenly transfers heat to the wastewater through the wall of the fourth shell 32 and the circumferentially distributed heat-conducting components 36. The indirect heating method ensures a uniform temperature distribution on the heating surface, avoiding the large-scale crystallization of sulfates on the heating surface. This solves the core technical problems of efficiency reduction, harmful gas generation, and difficulty in integrated matching with upstream catalytic devices caused by scaling.

[0073] In one embodiment, the heating assembly 35 includes: Mounting plate 37 is connected to the outer wall of the third housing 31; An electric heating module 38 is mounted on a mounting plate 37 and is insulated from the mounting plate 37. The heat-dissipating end of the electric heating module 38 passes through a mounting hole and extends into the medium-containing chamber 34; and... A heat-conducting sealing sleeve 39 is used to cover the outer periphery of the heat-dissipating end. The heat-conducting sealing sleeve 39 is connected to the wall of the mounting hole and seals the mounting hole so as to separate the medium-containing chamber 34 from the outside.

[0074] Specifically, the external power supply first supplies power to all electric heating modules 38. The heat-dissipating end of the electric heating module 38 transfers heat to the sealed heat-conducting sleeve 39 covering it. The sealed heat-conducting sleeve 39 then evenly releases the heat into the heat-conducting medium in the medium-containing chamber 34. After the heat-conducting medium heats up, it simultaneously heats the inner wall of the fourth shell 32 and the circumferentially distributed heat-conducting components 36 through natural convection. Finally, the heat is transferred to the purified water in the wastewater concentration space 33, causing the water to evaporate and be discharged through the steam exhaust pipe. The concentrated material is discharged through the slag discharge pipe. Throughout the process, the mounting plate 37 reliably fixes the electric heating module 38 to the outer wall of the third shell 31. The insulating connection layer effectively blocks the current from being conducted to the shell. The tight fit between the sealed heat-conducting sleeve 39 and the wall of the mounting hole completely isolates the medium-containing chamber 34 from the external environment.

[0075] During operation, after the purified water enters the wastewater concentration space 33, the electric heating module 38 starts and efficiently introduces heat into the medium receiving chamber 34 through the sealed heat-conducting sleeve 39. The fixed relationship between the mounting plate 37 and the outer wall of the third housing 31 ensures the stability of the position of each component, and the insulated connection prevents current leakage. The sealing fit between the sealed heat-conducting sleeve 39 and the wall of the mounting hole maintains the closed state of the medium receiving chamber 34 throughout the heating cycle, thereby eliminating leakage and safety hazards, and significantly improving energy utilization.

[0076] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the protection scope of the present invention.

Claims

1. A device for purifying ethyl thiocyanate wastewater, characterized in that, include: A wastewater containment mechanism is made of a light-transmitting material. The wastewater containment mechanism has a first containment space for storing water and a second containment space formed inside the first containment space. A plurality of liquid passage holes are formed between the second containment space and the first containment space, all of which are connected to the first containment space. The top of the first containment space is connected to an external wastewater collection tank through a pipe, and the second containment space is connected to an external treatment tank through a pipe. A wastewater catalytic mechanism, wherein the wastewater catalytic mechanism is installed within the second accommodating space, and a liquid passage is formed within the wastewater catalytic mechanism, the liquid passage being sealed and connected to all the liquid passage holes; and... A light source array mechanism is arranged around the outer periphery of the wastewater containing mechanism. The light-emitting ends of the light source array mechanism are all arranged facing the wastewater containing mechanism, and the light source array mechanism can emit light towards the wastewater containing mechanism to form a catalytic light field in the second containing space. The wastewater catalytic mechanism can catalytically oxidize sulfur-containing organic matter dissolved in the wastewater into sulfate in the catalytic light field.

2. The ethyl thiocyanate wastewater purification device as described in claim 1, characterized in that, The wastewater catalytic mechanism has multiple spaced installation positions on one side facing the second accommodating space, and multiple liquid passage holes are formed on each installation position. The liquid passage holes on the same installation position are spaced vertically. The wastewater catalytic mechanism includes: Multiple connecting components, wherein the number of connecting components corresponds to the number of installation positions and they are arranged in a one-to-one manner; and, Multiple wastewater catalytic components, each of which is equipped with at least one of the connecting components; When the wastewater catalytic component performs photocatalytic operation on the wastewater, the connecting component can switch from a first connection state to a second connection state, and in the second connection state, the connecting component can make the corresponding wastewater catalytic component fit tightly against the corresponding installation position.

3. The ethyl thiocyanate wastewater purification device as described in claim 2, characterized in that, The connecting component includes: Multiple bases, all of which are connected to the wastewater containing mechanism, all of which are located within the second containing space, and all of which are vertically spaced from the liquid passage holes at the same installation position; Multiple connecting components, the number of which is the same as the number of the base and they are installed one-to-one on the side of the base facing the second receiving space. All connecting components can be connected to the corresponding wastewater catalytic component and are in the first connected state; and, Multiple flexible connecting covers are provided, the number of which is the same as that of the base and they are one-to-one corresponding to the outer periphery of the corresponding installation position. Each flexible connecting cover can be sealed and connected to the corresponding wastewater catalytic component. The wastewater in the second accommodating space can squeeze the flexible connecting cover to fit against the outer wall of the second accommodating space and be in the second connected state.

4. The ethyl thiocyanate wastewater purification device as described in claim 3, characterized in that, The connection component includes: The plug-in rods are numbered identical to the bases and are installed one-to-one on the side of the bases facing the second receiving space. Each plug-in rod extends horizontally towards the central vertical axis of the second receiving space. Each plug-in rod contains a receiving cavity extending along its length, and multiple holes are arrayed on its shaft, all of which communicate with the receiving cavities. The spring bar is installed in the receiving cavity. The spring bar protrudes outward from the corresponding hole to form a buckle. The plug rod can be inserted into the wastewater catalytic component so that all the buckles are engaged with the wastewater catalytic component.

5. The ethyl thiocyanate wastewater purification device as described in claim 4, characterized in that, The flexible connecting cover is made of a transparent material.

6. The ethyl thiocyanate wastewater purification device as described in claim 4, characterized in that, The wastewater catalytic component includes: The outer casing is made of a light-transmitting material. One end of the outer casing is a connecting end, on which liquid guide tubes are formed, the number of which corresponds to the number of liquid passage holes at the corresponding installation positions and are inserted into one-to-one. The liquid guide tubes are sealed to the walls of the liquid passage holes. The outer casing contains placement chambers communicating with all the liquid passage holes, and the outer casing also has multiple channels communicating with the placement chambers. A titanium dioxide catalytic column is placed in the placement chamber. The titanium dioxide catalytic column has a honeycomb-like structure. Wastewater in the first containment space can flow into the placement chamber and then into the second containment space through the liquid passage holes, so that when the second containment space is under the catalytic light field, the sulfur-containing organic matter dissolved in the wastewater will be catalytically oxidized into sulfate.

7. The ethyl thiocyanate wastewater purification device as described in claim 6, characterized in that, A titanium dioxide enrichment layer is formed on the outer surface of the outer shell. The titanium dioxide enrichment layer avoids the placement chamber and is distributed in a spot-like pattern on the outer surface of the outer shell.

8. The ethyl thiocyanate wastewater purification device according to any one of claims 1 to 7, characterized in that, The light source array mechanism includes multiple ultraviolet light emission modules. All the ultraviolet light emission modules are arranged in a ring array on the outer periphery of the wastewater containing mechanism. All the ultraviolet light emission modules are electrically connected to an external point cloud. The light emission ends of the ultraviolet light emission modules are all arranged facing the second containing space, and a catalytic light field that can penetrate the second containing space is formed on the outer periphery of the wastewater containing mechanism.

9. The ethyl thiocyanate wastewater purification device according to any one of claims 1 to 7, characterized in that, The wastewater containment mechanism includes: The first housing is made of a light-transmitting material. A first water inlet is formed on the top of the first housing. The first water inlet is connected to the external wastewater collection tank through a pipe. The inner wall of the first housing forms the first accommodating space. A second housing, made of a light-transmitting material, is installed inside the first housing. The outer wall of the second housing forms the first receiving space between the inner wall of the first housing. The inner wall of the second housing encloses the second receiving space. A plurality of liquid-passing holes are arrayed on the second housing. The wastewater catalytic mechanism is installed on the inner wall of the second housing. A connecting pipe, isolated from the first receiving space, is installed at the bottom of the second housing and communicates with the external treatment tank. An exhaust pipe passes sequentially through the first housing, the first receiving space, and the second housing and extends to the top of the second receiving space. The exhaust pipe is sealed to the first housing and the second housing to discharge the gas generated in the second receiving space to the outside of the first housing.

10. A purification device with an integrated concentration structure, characterized in that, include: Base frame; The ethyl thiocyanate wastewater purification device according to any one of claims 1 to 9, wherein the light source array mechanism is mounted on the base frame, and the wastewater containing mechanism is connected to the base frame via a connecting bracket; and, A concentration mechanism is installed on the base frame and located below the wastewater containing mechanism. The concentration mechanism is connected to the wastewater containing mechanism through a pipeline and can heat and concentrate the wastewater discharged into the concentration mechanism.

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