A kind of fuel additive production wastewater treatment device

Abstract

The application belongs to the technical field of wastewater treatment devices, and discloses a wastewater treatment device for fuel additive production, which comprises an integrated water treatment tank, a water distribution reaction tank is fixedly connected to one side in the integrated water treatment tank, a reagent feeding pipe is arranged above the water distribution reaction tank, a dross separation tank is fixedly connected to the middle of the integrated water treatment tank, and the structure cooperation of the back-to-back plate one, the electric push rod, the back-to-back plate two and the replaceable silica gel scraping strip in the scraper assembly is used to drive the back-to-back plate two to drive the replaceable silica gel scraping strip to slide along the outer wall of the dross scraping plate when the electric push rod drives the dross scraping plate to move above the sludge discharge tank, so that the residual dross and dirt attached to the surface of the dross scraping plate are scraped off synchronously, the problem that secondary pollution and subsequent scraping effect decrease are caused by the adhesion of dross to the surface of the scraper in the existing dross scraping device is solved, the self-cleaning of the dross scraping plate is realized, the completeness and flatness of dross scraping are ensured, and the oil-water separation efficiency is effectively improved.

Description

Technical Field

[0001] This invention belongs to the technical field of wastewater treatment devices, specifically a wastewater treatment device for fuel additive production. Background Technology

[0002] The production of fuel additives generates a large amount of industrial wastewater containing emulsified oil, suspended flocs, and chemical agents. Air flotation separation is one of the commonly used technologies for treating this type of wastewater. It uses a scraper to remove the scum floating on the liquid surface to achieve solid-liquid separation. The wastewater treatment device for fuel additive production is a multi-stage combined treatment system specifically designed for the high-concentration, recalcitrant, toxic, and oily wastewater generated during the production of fuel additives (such as detergents, anti-wear agents, antioxidants, etc.). It aims to remove organic matter, oil, heavy metals, and other pollutants from the wastewater through synergistic physical, chemical, and biological processes to achieve compliant discharge or reuse.

[0003] For example, a flotation scraper with publication number CN104495970A includes a flotation tank and a scraping system positioned above the flotation tank. The flotation tank comprises three chambers: a primary sludge formation zone, a secondary sludge formation zone, and a clear water return zone. A vertical baffle is installed between the primary and secondary sludge formation zones, and a partition is installed between the secondary sludge formation zone and the clear water return zone. The partition has circular holes for connecting pipes to pass through. The wastewater inlet extends into the primary sludge formation zone and connects to the outlet pipe via a pipe. The scraping system includes gears, a chain, and scraper plates fixed to the chain. An aeration head is installed in the secondary sludge formation zone. The flotation scraper provided by this invention has a simple structure and is easy to operate. Through its secondary sludge removal design, it more effectively removes sludge from wastewater, further purifying the wastewater.

[0004] Although the above solution is simple in structure and easy to use, after long-term continuous operation of the slag scraper, the surface of the scraper plate is prone to the adhesion of highly adhesive slag residue. The slag in the wastewater from fuel additive production is rich in oily components such as mineral oil and organic additives, and the material has high bonding strength. After a single slag scraping operation, a thin layer of slag residue will inevitably remain on the surface of the conventional material scraper plate. When the scraper plate is re-entered into the water or when slag scraping operations are continued, the slag on the plate will fall off and be mixed back into the water, causing secondary pollution of the wastewater. At the same time, it will cause the efficiency of subsequent slag scraping and slag removal to continue to decline, which will significantly weaken the oil-water separation and treatment efficiency of the system. Summary of the Invention

[0005] To address the problems mentioned in the background section, the present invention provides a wastewater treatment device for fuel additive production.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wastewater treatment device for fuel additive production, comprising an integrated water treatment tank, a water distribution reaction tank fixedly connected to one side of the integrated water treatment tank, a reagent dosing pipe provided above the water distribution reaction tank, a scum separation tank fixedly connected to the middle of the integrated water treatment tank, a sludge discharge tank fixedly connected to the other side of the integrated water treatment tank, a sludge scraping chain assembly fixedly connected to the upper end of the integrated water treatment tank and located above the scum separation tank, a pair of mounting brackets fixedly connected to the output end of the sludge scraping chain assembly, a scraper plate fixedly connected to the end of the mounting bracket away from the scraper chain assembly, and further comprising: a scraper assembly disposed outside the scraper plate for cleaning residual dirt on the outer wall of the scraper plate;

[0007] The scraper assembly includes a first type of plate fixedly connected to the connection between the mounting bracket and the scraper plate. Electric push rods are symmetrically fixedly connected to both sides of the end of the first type of plate away from the mounting bracket. The output ends of the two electric push rods are connected to a second type of plate. The second type of plate is located outside the scraper plate. Replaceable silicone scraper strips are symmetrically arranged on the upper and lower inner walls of the second type of plate for reciprocating scraping of residual dirt against the outer wall of the scraper plate.

[0008] Preferably, the scraper assembly is provided with a quick-release locking component for quick disassembly, assembly, replacement, and maintenance of the replaceable silicone scraper strip. The quick-release locking component includes two through U-shaped grooves on the upper and lower inner walls of the second plate. The through U-shaped grooves on both sides are used to assemble the replaceable silicone scraper strip. A V-shaped opening clamping block is fixedly connected to the inner side wall of the through U-shaped grooves on both sides. A side-hardened side-opening mating block is fixedly connected to one side of the replaceable silicone scraper strip, and a side-hardened mating protrusion is fixedly connected to the other side of the replaceable silicone scraper strip.

[0009] Preferably, the upper end of the side rigid mating protrusion is provided with an upper slot, the inner side wall of the upper slot is equipped with a spring piece, the upper inner wall of the side rigid side opening mating block is provided with an arc-shaped slot, and the upper end of the spring piece is fixedly connected with an arc-shaped locking protrusion.

[0010] Preferably, both the first and second square plates are rectangular frame structures, and both square plates are arranged horizontally to ensure the horizontality of the scraping operation and prevent scraping residue from shifting.

[0011] Preferably, the replaceable silicone scraper has a trapezoidal cross-section, with its wider side fixedly connected to the inner wall of the second square plate, and its narrower side slidingly attached to the outer wall of the scraper plate.

[0012] Preferably, the spring sheet is a spring steel sheet, which in its natural state causes the arc-shaped locking protrusion to slightly protrude from the upper surface of the upper slot, in order to ensure the elastic locking allowance in the natural state and thus ensure the locking reliability.

[0013] Preferably, the curvature of the arc-shaped groove matches the curvature of the arc-shaped locking protrusion, and the arc-shaped locking protrusion forms an elastic buckle after being inserted into the arc-shaped groove, which is used to realize the detachable elastic locking and fixing of the two mating structures.

[0014] Preferably, the water distribution reaction tank, the scum separation tank, and the sludge discharge tank are distributed in parallel within the integrated water treatment tank, and the scum scraper chain group is a closed-loop chain drive structure.

[0015] Preferably, the slag scraping chain assembly is arranged horizontally along the length of the slag separation tank, and the transmission stroke of the slag scraping chain assembly covers the entire liquid surface area of ​​the slag separation tank, so as to fully cover the slag on the liquid surface for scraping without dead angles.

[0016] Preferably, the mating surfaces of the side-hardened side-opening mating block and the side-hardened mating protrusion are flat and fitting surfaces, and there is no gap or offset in the contact surface after the two are mated.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] This invention, through the structural cooperation of a scraper assembly consisting of a first-stage sliding plate, an electric push rod, a second sliding plate, and a replaceable silicone scraper strip, utilizes the electric push rod to drive the second sliding plate, which in turn moves the replaceable silicone scraper strip to slide against the outer wall of the scraper plate when the scraper plate moves above the sludge discharge tank. This simultaneously scrapes away residual scum and dirt adhering to the surface of the scraper plate, solving the problem of secondary pollution and reduced subsequent scraping effect caused by scum adhering to the scraper plate surface in existing scraper devices. It achieves self-cleaning of the scraper plate, ensures the integrity and smoothness of scum removal, and effectively improves oil-water separation efficiency.

[0019] This invention utilizes a quick-release locking assembly with a structure consisting of a U-shaped groove running through both sides, a V-shaped opening clamping block, a side-hardened side-opening docking block, a side-hardened docking protrusion, a spring, an arc-shaped locking protrusion, and an arc-shaped slot. The V-shaped opening clamping block provides adaptive elastic clamping for the replaceable silicone scraper, and the insertion and locking structure of the side-hardened side-opening docking block and the side-hardened docking protrusion enables rapid positioning and disassembly. This solves the problems of difficult silicone scraper replacement, the need for specialized tools, and long downtime in existing equipment. It enables tool-free, rapid replacement of the replaceable silicone scraper within seconds, significantly reducing the operational difficulty and time cost of daily equipment maintenance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the integrated water treatment tank of the present invention;

[0021] Figure 2 This is a schematic diagram of the slag scraper chain assembly structure of the present invention;

[0022] Figure 3This is a schematic diagram of the scraper assembly structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the quick-release locking component structure of the present invention;

[0024] Figure 5 This is a schematic cross-sectional view of the rigid side-opening docking block of the present invention;

[0025] Figure 6 This is a schematic diagram of the spring structure of the present invention.

[0026] In the diagram: 1. Integrated water treatment tank; 2. Water distribution reaction tank; 3. Chemical dosing pipe; 4. Scum separation tank; 5. Sludge discharge tank; 6. Scum scraper chain assembly; 7. Mounting bracket; 8. Scum scraper; 9. Scum scraper assembly; 900. Reverse plate one; 901. Electric push rod; 902. Reverse plate two; 903. Replaceable silicone scraper strip; 10. Quick-release locking assembly; 1000. Through-hole U-shaped groove on both sides; 1001. V-shaped opening clamp; 1002. Side rigid side opening docking block; 1003. Side rigid docking protrusion; 1004. Top slot; 1005. Spring piece; 1006. Arc-shaped slot; 1007. Arc-shaped locking protrusion. Detailed Implementation

[0027] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figures 1 to 6As shown, this invention provides a wastewater treatment device for fuel additive production, including an integrated water treatment tank 1. A water distribution reaction tank 2 is fixedly connected to one side of the integrated water treatment tank 1, and a reagent dosing pipe 3 is installed above the water distribution reaction tank 2. A scum separation tank 4 is fixedly connected to the middle of the integrated water treatment tank 1, and a sludge discharge tank 5 is fixedly connected to the other side of the integrated water treatment tank 1. A scum scraping chain assembly 6 located above the scum separation tank 4 is fixedly connected to the upper end of the integrated water treatment tank 1. A pair of mounting brackets 7 are fixedly connected to the output end of the scum scraping chain assembly 6, and the end of the mounting brackets 7 away from the scum scraping chain assembly 6 is fixed. The system is connected to a scraper plate 8 and also includes a scraper assembly 9 disposed outside the scraper plate 8 for cleaning residual dirt on the outer wall of the scraper plate 8. The scraper assembly 9 includes a first scraper plate 900 fixedly connected to the connection between the mounting bracket 7 and the scraper plate 8. Electric push rods 901 are symmetrically fixedly connected to both sides of the end of the first scraper plate 900 away from the mounting bracket 7. The output ends of the two electric push rods 901 are connected to a second scraper plate 902. The second scraper plate 902 is located outside the scraper plate 8. Replaceable silicone scraper strips 903 are symmetrically arranged on the upper and lower inner walls of the second scraper plate 902 for reciprocating scraping of residual dirt against the outer wall of the scraper plate 8.

[0029] The above solution is adopted: the scraper chain assembly 6 is installed in the dedicated working area at the top of the scum separation tank 4. The dedicated working space is clearly defined and will not interfere with the water in the tank or the equipment structure. The scraper assembly 9 is integrated and deployed on the outside of the scraper plate 8 without occupying additional installation space above the tank. The structure has a high degree of integration and achieves the self-cleaning function of the scraper plate without changing the original main structure of the equipment or increasing the equipment footprint.

[0030] like Figures 2 to 6 As shown, the scraper assembly 9 is equipped with a quick-release locking assembly 10 for quick disassembly, assembly, and replacement of the replaceable silicone scraper strip 903. The quick-release locking assembly 10 includes U-shaped grooves 1000 formed on both sides of the upper and lower inner walls of the U-shaped plate 902. These U-shaped grooves 1000 are used to assemble the replaceable silicone scraper strip 903. A V-shaped opening clamping block 1001 is fixedly connected to the inner wall of the U-shaped grooves 1000. A side-hardened side-opening mating block 1002 is fixedly connected to one side of the replaceable silicone scraper strip 903. On the other side of 3, a rigid side-mounted mating protrusion 1003 is fixedly connected. The upper end of the rigid side-mounted mating protrusion 1003 is provided with an upper slot 1004. A spring piece 1005 is installed on the inner side wall of the upper slot 1004. An arc-shaped slot 1006 is provided on the upper inner wall of the rigid side-mounted mating block 1002. An arc-shaped locking protrusion 1007 is fixedly connected to the upper end of the spring piece 1005. Both the first and second square plates 900 and 902 are rectangular frame structures. The second and first square plates 902 are horizontally arranged to ensure the horizontality of the scraping operation and avoid scraping residue from shifting.

[0031] The above solution is adopted: the quick-release locking component 10 is a built-in adapter structure of the scraper component 9, which is integrated into the inside of the two-sided plate 902. There is no external protrusion structure, so it will not interfere with the normal slag scraping adjustment operation. The overall structure is compact and highly adaptable. The through U-shaped grooves 1000 on both sides adopt a through groove structure design, which can provide a regular moving track and installation space for component assembly, alignment sliding, disassembly and pull-out.

[0032] like Figures 1 to 6 As shown, the replaceable silicone scraper 903 has a trapezoidal cross-section. Its wider side is fixedly connected to the inner wall of the square plate 902, and its narrower side slides against the outer wall of the scraper plate 8. The spring sheet 1005 is a spring steel sheet. In its natural state, the arc-shaped locking protrusion 1007 slightly protrudes from the upper surface of the upper slot 1004 to ensure elastic locking allowance in its natural state, thereby ensuring locking reliability. The curvature of the arc-shaped groove 1006 matches the curvature of the arc-shaped locking protrusion 1007, and the arc-shaped locking protrusion 1007 forms an elastic buckle lock after being inserted into the arc-shaped groove 1006. The two docking structures are designed for detachable elastic locking. The water distribution reaction tank 2, the scum separation tank 4, and the sludge discharge tank 5 are distributed in parallel within the integrated water treatment tank 1. The scum scraping chain group 6 is a closed-loop chain drive structure. The scum scraping chain group 6 is horizontally arranged along the length of the scum separation tank 4, and the transmission stroke of the scum scraping chain group 6 covers the entire liquid surface area of ​​the scum separation tank 4. It is used to fully cover the scum on the liquid surface for scraping without dead angles. The docking end faces of the side rigid side open docking block 1002 and the side rigid docking protrusion 1003 are flat and fit surfaces. After docking, there is no gap or offset in the contact surface.

[0033] The above solution, in conjunction with the spring piece 1005, the arc-shaped slot 1006, and the arc-shaped locking protrusion 1007, forms an elastic snap-locking structure. This eliminates the traditional assembly methods of bolt fixing and welding fixing, allowing for component disassembly and assembly without the need for external disassembly tools. The structural design, where the arc-shaped slot 1006 and the arc-shaped locking protrusion 1007 are perfectly matched in curvature, enables all-around fitting and locking, resulting in a tight fit after locking.

[0034] Working principle and usage process of this invention:

[0035] The integrated water treatment tank 1 is used to centrally collect and treat the wastewater generated during the production of fuel additives in stages. The water distribution reaction tank 2 continuously receives the production wastewater to be treated, thereby achieving uniform water distribution and temporary storage of the wastewater. The reagent dosing pipe 3 continuously and quantitatively adds the corresponding water treatment reagent into the water distribution reaction tank 2 according to the preset ratio. The wastewater and water treatment reagent can continuously contact and undergo neutralization and demulsification mixing reactions in the internal cavity of the water distribution reaction tank 2. After the reaction is fully completed, the wastewater will flow smoothly by gravity under the action of liquid level pressure difference, and then enter the internal space of the scum separation tank 4. The wastewater entering the scum separation tank 4 is in a static separation state. The emulsified oil and suspended flocs contained in the wastewater gradually complete the floating separation. Larger particles of impurities and settled sludge will settle downwards under gravity and fall into the sludge discharge tank 5 for centralized storage. The water distribution reaction tank 2, scum separation tank 4, and sludge discharge tank 5 are arranged in parallel. The scraper chain group 6 fixedly installed at the top of the integrated water treatment tank 1 maintains a continuous closed-loop circulation operation. During operation, the scraper chain group 6 will stably drive the mounting bracket 7 fixedly connected at the end to move synchronously in a circulation. During the movement, the mounting bracket 7 further drives the scraper plate 8 to move laterally at a uniform speed above the liquid surface of the scum separation tank 4. During the movement, the scraper plate 8 continuously contacts the scum on the liquid surface, thereby completing the overall scraping of scum and achieving the initial separation of scum from water.

[0036] Scraper assembly 9 is fixedly mounted on the outer side of scraper plate 8. Scraper assembly 9 can help optimize the integrity of scum removal and reduce scum residue. A cross plate 900 is fixedly mounted at the connection point between mounting bracket 7 and scraper plate 8, which can reinforce and limit the installation structure of scraper plate 8, maintain the stability of the overall structure during scum removal, and prevent structural loosening due to long-term scum removal vibration. Electric push rods 901 are symmetrically mounted on both sides of cross plate 900. Electric push rods 901 can output forward and backward extension driving power according to operational needs. During operation, electric push rods 901 will drive the end-connected return... The second plate 902 adjusts its position relative to the scraper plate 8. The equipment has a preset scraping operation logic, which sets the fine-tuning operation time when the scraper plate 8 moves to the position above the sludge discharge tank 5. The upper and lower inner walls of the second plate 902 are symmetrically equipped with replaceable silicone scraper strips 903. The replaceable silicone scraper strips 903 always keep in sliding contact with the outer wall of the scraper plate 8. During the displacement adjustment of the second plate 902, the replaceable silicone scraper strips 903 can simultaneously scrape off the residual scum and dirt attached to the surface of the scraper plate 8, keep the surface of the scraper plate 8 clean, and ensure the flatness and effectiveness of the subsequent scum removal operation.

[0037] The scraper assembly 9 is internally equipped with a quick-release locking component 10, which enables the quick disassembly, assembly, and maintenance replacement of the replaceable silicone scraper strip 903. The upper and lower inner walls of the rotary plate 902 are provided with through-slots 1000 on both sides. These through-slots 1000 provide fixed positioning space and travel for component assembly, sliding adjustment, and disassembly operations. V-shaped opening clamps 1001 are fixedly installed on the inner walls of the through-slots 1000. The V-shaped opening clamps 1001 can hold the assembled replaceable silicone scraper strip 903 in place. The rubber scraper 903 features self-adaptive wrapping and clamping to maintain its fixed position during operation. When the replaceable silicone scraper 903 needs to be replaced after long-term operation, the operator can align it with the side-hardened side-opening docking blocks 1002 and side-hardened docking protrusions 1003 on both sides of the U-shaped groove 1000 through the side openings. During the docking process, manually pressing the spring 1005 causes it to contract and deform, allowing the side-hardened docking protrusions 1003 to be smoothly inserted. The rigid side-opening mating block 1002 is inserted into its internal hole. After insertion, the pressed spring 1005 is released, and the spring 1005 returns to its original position, causing the top-fixed arc-shaped locking protrusion 1007 to precisely engage with the arc-shaped slot 1006, completing the locking and fixing of the two mating parts. After the parts are locked, the operator pulls the replaceable silicone scraper 903 from the other side of the U-shaped groove 1000, so that the new replaceable silicone scraper 903 is smoothly engaged with the clamping area of ​​the V-shaped opening clamp 1001. 01. It adopts a metal elastic clamping structure, and the clamping distance can be adaptively and finely adjusted without reducing its own clamping and fixing force. After the new replaceable silicone scraper 903 is assembled, press the spring piece 1005 again to release the engagement state of the arc-shaped locking protrusion 1007 and the arc-shaped slot 1006, and separate the docking structure of the side rigid side opening docking block 1002 and the side rigid docking protrusion 1003. The entire replacement operation of fixing the new part and removing the old part can be completed, simplifying the equipment maintenance disassembly and assembly steps and effectively reducing the operational difficulty and time cost of daily equipment operation and maintenance.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment device for fuel additive production, comprising an integrated water treatment tank (1), a water distribution reaction tank (2) fixedly connected to one side of the integrated water treatment tank (1), a reagent dosing pipe (3) provided above the water distribution reaction tank (2), a scum separation tank (4) fixedly connected to the middle of the integrated water treatment tank (1), a sludge discharge tank (5) fixedly connected to the other side of the integrated water treatment tank (1), a sludge scraping chain assembly (6) located above the scum separation tank (4) fixedly connected to the upper end of the integrated water treatment tank (1), a pair of mounting brackets (7) fixedly connected to the output end of the sludge scraping chain assembly (6), and a scraper plate (8) fixedly connected to the end of the mounting bracket (7) away from the sludge scraping chain assembly (6), characterized in that: Also includes: A scraper assembly (9) is provided outside the scraper plate (8) for cleaning residual dirt on the outer wall of the scraper plate (8); The scraper assembly (9) includes a first type of plate (900) fixedly connected to the connection between the mounting bracket (7) and the scraper plate (8). Electric push rods (901) are symmetrically fixedly connected to both sides of the end of the first type of plate (900) away from the mounting bracket (7). The output ends of the two electric push rods (901) are connected to a second type of plate (902). The second type of plate (902) is located outside the scraper plate (8). Replaceable silicone scraper strips (903) are symmetrically arranged on the upper and lower inner walls of the second type of plate (902) for reciprocating scraping of residual dirt against the outer wall of the scraper plate (8).

2. The wastewater treatment device for fuel additive production according to claim 1, characterized in that: The scraper assembly (9) is provided with a quick-release locking assembly (10) for quick disassembly and replacement of the replaceable silicone scraper strip (903). The quick-release locking assembly (10) includes two through U-shaped grooves (1000) on the upper and lower inner walls of the two-sided plate (902). The two through U-shaped grooves (1000) are used to assemble the replaceable silicone scraper strip (903). A V-shaped opening clamp (1001) is fixedly connected to the inner wall of the two through U-shaped grooves (1000). A side hard side opening docking block (1002) is fixedly connected to one side of the replaceable silicone scraper strip (903), and a side hard docking protrusion (1003) is fixedly connected to the other side of the replaceable silicone scraper strip (903).

3. The wastewater treatment device for fuel additive production according to claim 2, characterized in that: The upper end of the side rigid mating protrusion (1003) is provided with an upper slot (1004), and a spring piece (1005) is installed on the inner side wall of the upper slot (1004). The upper inner wall of the side rigid side opening mating block (1002) is provided with an arc-shaped slot (1006), and an arc-shaped locking protrusion (1007) is fixedly connected to the upper end of the spring piece (1005).

4. The wastewater treatment device for fuel additive production according to claim 1, characterized in that: Both the first (900) and the second (902) of the square plate are rectangular frame structures, and the second (902) and the first (900) of the square plate are arranged horizontally to ensure the horizontality of the scraping operation and avoid the scraping residue from shifting.

5. The wastewater treatment device for fuel additive production according to claim 1, characterized in that: The replaceable silicone scraper (903) has a trapezoidal cross-section. Its wider side is fixedly connected to the inner wall of the second square plate (902), and its narrower side is slidably attached to the outer wall of the scraper plate (8).

6. The wastewater treatment device for fuel additive production according to claim 3, characterized in that: The spring sheet (1005) is a spring steel sheet. In its natural state, the arc-shaped locking protrusion (1007) protrudes slightly from the upper surface of the upper slot (1004) to ensure the elastic locking allowance in its natural state, so as to ensure the locking reliability.

7. The wastewater treatment device for fuel additive production according to claim 3, characterized in that: The arc of the arc-shaped slot (1006) matches the arc of the arc-shaped locking protrusion (1007), and the arc-shaped locking protrusion (1007) forms an elastic buckle lock after being inserted into the arc-shaped slot (1006), which is used to realize the detachable elastic locking and fixing of the two docking structures.

8. The wastewater treatment device for fuel additive production according to claim 1, characterized in that: The water distribution reaction tank (2), the scum separation tank (4), and the sludge discharge tank (5) are distributed in parallel within the integrated water treatment tank (1), and the scum scraping chain group (6) is a closed-loop chain drive structure.

9. The wastewater treatment device for fuel additive production according to claim 1, characterized in that: The scraper chain assembly (6) is horizontally arranged along the length of the scum separation tank (4), and the transmission stroke of the scraper chain assembly (6) covers the entire liquid surface area of ​​the scum separation tank (4), which is used to fully cover the scum on the liquid surface for scraping without dead angles.

10. The wastewater treatment device for fuel additive production according to claim 3, characterized in that: The mating surfaces of the side-hardened side-opening mating block (1002) and the side-hardened mating protrusion (1003) are flat and fit together, and there is no gap or offset in the contact surface after they are mated.

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