A strong oxidation treatment device applied to formaldehyde wastewater

Abstract

The application relates to the field of water treatment equipment, in particular to a strong oxidation treatment device for formaldehyde wastewater, which comprises an aeration cabin, the aeration cabin comprises a first cabin wall, the first cabin wall is formed with a filter wall at a portion close to the bottom of the first cabin wall, the top of the first cabin wall is provided with an upper discharge port, and the bottom wall of the aeration cabin is provided with a closable slag discharge port; an aeration part is provided with an aeration head arranged in an aeration cavity, and the aeration head is located on the upper side of the filter wall; a cleaning assembly comprises a cleaning frame capable of moving up and down and a driving part for driving the cleaning frame to move, the cleaning frame is provided with a cleaning brush capable of contacting the filter wall, so that the driving part drives the cleaning frame to move and clean the surface side of the filter wall; and the catalysis cabin comprises a second cabin wall provided with a catalysis cavity, the bottom of the catalysis cavity is communicated with the aeration cavity through the filter wall, and a catalysis part is arranged in the catalysis cavity. The separated aeration cabin and catalysis cabin effectively solve the problems existing in the prior art.

Description

Technical Field

[0001] This invention relates to the field of water treatment equipment, and more particularly to a strong oxidation treatment device for formaldehyde wastewater. Background Technology

[0002] Formaldehyde-containing wastewater is often generated during industrial manufacturing processes such as board processing. Formaldehyde removal from this wastewater is a crucial step in its harmless treatment. For treating formaldehyde-containing wastewater, advanced strong oxidation technologies are commonly used to oxidize the formaldehyde. Currently, commonly used strong oxidation technologies include ozone treatment, Fenton process treatment, electro-oxidation treatment, and ultraviolet catalytic treatment. For example, the formaldehyde-containing wastewater treatment device disclosed in application number 201821305032.2 uses a combination of ozone aeration and ultraviolet catalysis to treat formaldehyde-containing wastewater. In this type of treatment, ozone aeration generates diffuse bubbles in the wastewater. These diffuse bubbles reduce the propagation of ultraviolet light in the wastewater liquid, affecting the efficiency of ultraviolet catalysis. Moreover, during the oxidation treatment of harmful substances in the wastewater after ozone dissolves in water, the pH of the wastewater changes, which can easily lead to the formation of precipitates in the wastewater. These precipitates affect the propagation of light in the wastewater and are also prone to adhering to the surface of the catalytic medium, affecting the working efficiency of the catalytic medium.

[0003] Therefore, there is an urgent need to improve existing strong oxidation treatment devices used for formaldehyde wastewater. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a strong oxidation treatment device for formaldehyde wastewater, which effectively solves the problems existing in the prior art by setting up separate aeration chambers and catalytic chambers.

[0005] To address the aforementioned problems, this invention provides a strong oxidation treatment device for formaldehyde wastewater, comprising: an aeration chamber, the aeration chamber including a first chamber wall with an aeration cavity, a filter wall formed near the bottom of the first chamber wall, and an openable and closable upper discharge port provided near the top of the first chamber wall. An overflow collection tank is provided on the outer side of the aeration chamber at a position corresponding to the upper discharge port, so that when the liquid level in the aeration chamber is higher than the upper discharge port and the upper discharge port is open, the upper discharge port can discharge the liquid inside the first chamber wall into the overflow collection tank. The aeration chamber has an openable and closable slag discharge port on its bottom wall; an aeration component has an aeration head disposed in the aeration chamber, the aeration head being located on the upper side of the filter wall; a cleaning component includes a cleaning frame that can move up and down and a driving component that drives the cleaning frame to move, the cleaning frame having a cleaning brush that can contact the filter wall, so that the driving component drives the cleaning frame to move and clean the surface of the filter wall; a catalytic chamber includes a second chamber wall having a catalytic cavity, the bottom of the catalytic cavity being connected to the aeration chamber through the filter wall, and a catalytic element being disposed inside the catalytic cavity.

[0006] Furthermore, the second bulkhead includes a first annular wall surrounding the outside of the first bulkhead, with a gap between the first annular wall and the first bulkhead.

[0007] Furthermore, the filter wall is configured to surround the aeration chamber circumferentially.

[0008] Furthermore, the cleaning rack is equipped with a counterweight, and the driving component includes a floating body and a connector connecting the floating body and the cleaning rack; the floating body and the counterweight are arranged such that when the floating body rises, it can drive the cleaning rack to move upward, and when the floating body moves downward, the counterweight drives the cleaning rack to move downward.

[0009] Furthermore, the strong oxidation treatment device also includes an upper discharge valve disposed on the upper discharge port, and the floating body is provided with a connecting rope connected to the upper discharge valve; wherein, when the floating body moves downward to the point that it can pull the upper discharge valve downward, the upper discharge valve closes, and when the floating body moves upward to a set position, it can push the upper discharge valve to open the upper discharge port.

[0010] Furthermore, the strong oxidation treatment device also includes: an upper discharge valve disposed at the upper discharge port, the upper discharge valve having a starting block; a trigger bracket connected to the floating body, the trigger bracket having an upper trigger block and a lower trigger block spaced vertically at the position of the upper discharge valve; wherein, when the floating body drives the trigger bracket to move upward until the lower trigger block pushes the starting block, the upper discharge valve opens, and when the lower trigger block moves downward until the lower trigger block pushes the starting block, the upper discharge valve closes.

[0011] Furthermore, the upper discharge valve includes a fixed ring and a valve plate disposed on the fixed ring, the valve plate being capable of opening and closing the upper discharge port by vertical movement.

[0012] Furthermore, the bottom wall of the aeration chamber gradually slopes downward from its edge to the center, and the slag discharge port is located in the center of the bottom wall of the aeration chamber.

[0013] Furthermore, the catalytic chamber also includes a second annular wall surrounding the outside of the first annular wall, with a gap between the first annular wall and the second annular wall; wherein, the top of the first annular wall forms a space through which water flows between the inside and outside of the first annular wall.

[0014] Furthermore, an ultraviolet lamp is embedded in the first annular wall, and a catalyst is provided between the first chamber wall and the first annular wall and / or between the first annular wall and the second annular wall.

[0015] The advantages of this invention lie in its simple structure. By setting up separate aeration chambers and catalytic chambers, it effectively solves the problems existing in the prior art. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of the floating body after it floats up in one embodiment of the present invention.

[0018] Figure 2 for Figure 1 A schematic diagram of the structure of the floating body after it descends in the embodiment shown.

[0019] Figure 3 for Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0020] The components are as follows: 1. First bulkhead; 2. Filter wall; 3. Top outlet; 4. Overflow collection tank; 5. Aeration component; 6. Cleaning rack; 601. Cleaning brush; 602. Counterweight; 603. Cleaning ring; 7. First ring wall; 8. Second ring wall; 9. Floating body; 10. Connector; 11. Top outlet valve; 1101. Fixing ring; 1102. Valve plate; 12. Connecting rope; 13. Slag discharge port; 14. Ultraviolet lamp tube; 15. Guide rod. Detailed Implementation

[0021] To more clearly illustrate the overall concept of the present invention, a detailed description will be provided below with reference to the accompanying drawings and examples.

[0022] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0023] Furthermore, in the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two connected entities do not establish a connection relationship through an intermediate structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0025] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] In this invention, such as Figure 1-3As shown, a strong oxidation treatment device for formaldehyde wastewater is provided, comprising: an aeration chamber, the aeration chamber including a first chamber wall 1 having an aeration cavity, the first chamber wall 1 having a filter wall 2 formed near its bottom, the first chamber wall 1 having an openable and closable upper discharge port 3 near its top, and an overflow collection tank 4 provided on the outer side of the aeration chamber at a position corresponding to the upper discharge port 3, so that when the liquid level in the aeration chamber is higher than the upper discharge port 3 and the upper discharge port 3 is open, the upper discharge port 3 can discharge the liquid inside the first chamber wall 1 to the overflow collection tank 4. The bottom of the aeration chamber... The filter wall 2 is provided with an openable and closable slag discharge port 13; an aeration component 5, having an aeration head disposed in the aeration chamber, the aeration head being located on the upper side of the filter wall 2; a cleaning assembly, including a vertically movable cleaning frame 6 and a driving component for moving the cleaning frame 6, the cleaning frame 6 having a cleaning brush 601 capable of contacting the filter wall 2, so that the driving component moves the cleaning frame 6 to clean the surface of the filter wall 2; a catalytic chamber, the catalytic chamber including a second chamber wall having a catalytic cavity, the bottom of the catalytic cavity communicating with the aeration chamber through the filter wall 2, the catalytic cavity being provided with a catalytic element.

[0027] In use, the wastewater flows into the aeration chamber from the top. Ozone is introduced into the lower section of the aeration chamber via the aeration element 5 for aeration. The ozone dissolves in the water and treats the formaldehyde in the wastewater. The wastewater then enters the catalytic chamber through the filter wall 2. As the wastewater flows within the catalytic chamber, it is catalytically oxidized by the catalytic element, thus improving the wastewater treatment efficiency.

[0028] During wastewater flow, because the aeration element 5 is located above the filter wall 2, the gas introduced through the aeration element 5 is dispersed upwards, reducing the possibility of gas entering the catalytic chamber from the filter element location, thereby reducing the impact of gas influx on ultraviolet photocatalysis in the catalytic chamber. Furthermore, when precipitates are generated in the wastewater within the aeration chamber, the sedimentary precipitates gradually move downwards and settle on the bottom wall of the aeration chamber and the filter wall 2, while the suspended precipitates are carried upwards by the aeration bubbles to the upper discharge port 3. Under set conditions (such as set time, wastewater flow rate through the filter wall, and liquid level in the aeration chamber), the upper discharge port 3 is activated to discharge the suspended precipitates from the aeration chamber into the overflow collection tank 4, where they are collected and treated (either discharged or filtered before being reintroduced into the aeration chamber). The drive unit moves the cleaning frame 6, causing the cleaning brush 601 to clean the filter wall 2.

[0029] When a certain amount of precipitates have accumulated on the bottom wall of the aeration chamber, the slag discharge port 13 can be opened to discharge the precipitates from the bottom wall of the aeration chamber.

[0030] By setting up the discharge of precipitates and the cleaning of the filter wall 2, the present invention can reduce the precipitates in the catalytic chamber, thereby reducing the impact of precipitates adhering to the catalytic elements on catalytic oxidation, and also preventing the impact of deposited precipitates on the flow capacity of the filter wall 2, so as to ensure the speed of wastewater flow and the efficiency of wastewater treatment.

[0031] In a preferred embodiment, and more specifically regarding the structure of the present invention, as shown in the figure, the second bulkhead includes a first annular wall 7 surrounding the outer side of the first bulkhead 1, with a gap between the first annular wall 7 and the first bulkhead 1.

[0032] As shown in the figure, the first bulkhead 1 and the first annular wall 7 are roughly cylindrical. This allows the inner side of the first bulkhead 1 to provide space for aeration bubbles to float. Under the same wastewater flow cross-section, the inner wall circumference of the first bulkhead 1 is smaller, thus reducing the problem of bubble enlargement caused by contact between aeration bubbles and the inner side of the first bulkhead 1. At the same time, the contact area between wastewater and the first bulkhead 1 and the first annular wall 7 in the annular flow cross-section is large. At this time, a catalytic medium (such as metallic titanium dioxide) can be placed between the outer surface of the first bulkhead 1 and the inner surface of the first annular wall 7 to increase the efficiency of catalytic oxidation of wastewater when flowing in the catalytic chamber.

[0033] In the embodiment shown in the figure, specifically regarding the structure of the present invention, the filter wall 2 is arranged to surround the aeration chamber circumferentially. This increases the cross-sectional area of ​​wastewater flow between the aeration chamber and the catalytic chamber, thereby improving the fluid capacity of the wastewater.

[0034] In the embodiment shown in the figure, specifically regarding the structure of the present invention, the bottom wall of the aeration chamber gradually slopes downward from its edge towards the center, and the slag discharge port 13 is located in the center of the bottom wall of the aeration chamber. As shown in the figure, this arrangement allows the sedimentary precipitates on the bottom wall of the aeration chamber to move towards the downward slag discharge port 13, facilitating the collection of sedimentary precipitates at the slag discharge port 13, so that the precipitates on the bottom wall of the aeration chamber can be discharged relatively thoroughly during discharge.

[0035] In the embodiment shown in the figure, for a more specific description of the structure of the present invention, the catalytic chamber further includes a second annular wall 8 surrounding the outside of the first annular wall 7, with a gap between the first annular wall 7 and the second annular wall 8; wherein, the top of the first annular wall 7 forms a space through which water flows between the inner and outer sides of the first annular wall 7. As shown in the figure, by such an arrangement, the flow cross-sectional area of ​​wastewater at these two gap locations can be ensured, thus guaranteeing the wastewater flow capacity, while keeping the gaps between the first annular wall 7 and the second annular wall 8 and between the first annular wall 7 and the first chamber wall 1 small. This increases the length of the wastewater flow path throughout the entire device with a small increase in the overall lateral dimension, and allows for the placement of catalytic elements at the two gap locations, further enhancing the wastewater treatment effect.

[0036] In the illustrated embodiment, a further optimization of the structure of the present invention is that the first annular wall 7 is fitted with an ultraviolet lamp tube 14, and a catalyst is provided between the first chamber wall 1 and the first annular wall 7 and / or between the first annular wall 7 and the second annular wall 8.

[0037] As shown in the figure, more specifically, the ultraviolet lamp 14 embedded in the first ring wall 7 can simultaneously perform ultraviolet oxidation treatment on the wastewater on both the inner and outer sides of the first ring wall 7, thereby improving the utilization efficiency of the ultraviolet lamp 14.

[0038] For the installation of the catalyst, it is preferable to place the catalyst on the wall surface of the first annular wall 7 and the second annular wall 8, or the catalyst can be installed by attaching the catalyst medium to the mounting bracket.

[0039] Regarding the catalyst selection, in the embodiments of the present invention, existing catalysts can be selected. The catalyst can be either a catalyst suitable for ultraviolet oxidation of formaldehyde wastewater or a catalyst suitable for ozone oxidation of formaldehyde. Alternatively, in embodiments where the ultraviolet lamp 14 is not provided, only a catalyst suitable for ozone oxidation of formaldehyde can be selected.

[0040] In a preferred embodiment of the present invention, the cleaning rack 6 is further specifically provided with a counterweight 602, and the driving component includes a floating body 9 and a connecting member 10 connecting the floating body 9 and the cleaning rack 6. The floating body 9 and the counterweight 602 are arranged such that when the floating body 9 floats up, it can drive the cleaning rack 6 to move upward, and when the floating body 9 moves downward, the counterweight 602 drives the cleaning rack 6 to move downward.

[0041] As shown in the figure, when a certain amount of sediment adheres to the filter wall 2, the filter wall 2's throughput capacity decreases. With a constant influent flow rate in the aeration chamber, the liquid level gradually rises, causing the floating component to float upwards and move the cleaning frame 6 upwards. This allows the cleaning frame 6 to perform minor cleaning of the filter wall 2, ensuring its throughput capacity. As the liquid level in the aeration chamber rises to a certain height, the upper drain 3 opens to discharge top wastewater. At this time, the counterweight 602 moves the cleaning frame 6 downwards to thoroughly clean the filter wall 2, restoring its wastewater throughput capacity.

[0042] In the illustrated embodiment, regarding the structure of the cleaning frame 6 and the counterweight 602, more specifically, as shown in the figure, the counterweight 602 is annular (it can be a metal-coated plastic structure). The cleaning frame 6 includes two vertically spaced cleaning rings 603, which are connected to the lower side of the counterweight 602. A cleaning brush 601 is provided on the outer periphery of each cleaning ring 603. This allows the annular counterweight 602 and cleaning rings 603 to act as guides during vertical movement, ensuring smooth and stable movement of the entire cleaning frame 6.

[0043] For the connector 10, it is preferable to use a rope or a rod as the connector 10.

[0044] In the illustrated embodiment, to further specify the structure of the present invention, as shown in the figure, the strong oxidation treatment device further includes an upper discharge valve 11 disposed on the upper discharge port 3, and the floating body 9 is provided with a connecting rope 12 connected to the upper discharge valve 11; wherein, when the floating body 9 moves downward to the point that it can pull the upper discharge valve downward, the upper discharge valve is closed, and when the floating body 9 moves upward to a set position, it can push the upper discharge valve 11 to open the upper discharge port 3.

[0045] like Figure 1 As shown, when the floating body 9 floats upward and lifts the upper discharge valve 11, the upper discharge port 3 is opened. At this time, the liquid level in the aeration chamber is above the upper discharge port 3, and the upper discharge port 3 discharges liquid outward. As the liquid level in the aeration chamber decreases, the floating body 9 gradually moves downward and gradually separates from the upper discharge valve 11. When the floating body 9 moves downward to the point where the connecting rope 12 tightens the upper discharge valve 11, the upper discharge valve 11 begins to close the upper discharge port 3 until the upper discharge port 3 is closed.

[0046] This application employs a structure that mechanically links the floating body 9 with the upper discharge valve 11. This allows for the control of the opening and closing of the upper discharge port 3 based on changes in the liquid level within the aeration chamber. Simultaneously, it creates a liquid level difference between the activation and closure of the floating body 9 and the upper discharge port 3, enabling intermittent discharge of wastewater from the top of the aeration chamber. This increases the content of suspended solids in the wastewater discharged through the upper discharge port 3, reducing the amount of wastewater discharged from the top. Furthermore, it allows the floating body 9 to rise, causing the cleaning frame 6 to move slightly to clean the filter wall 2, while the continuous drainage from the upper discharge port 3 causes the floating body 9 to move rapidly downwards, resulting in a rapid overall cleaning of the cleaning frame 6.

[0047] In the illustrated embodiment, the structure of the upper discharge valve 11, as shown in the figure, includes a fixing ring 1101 and a valve plate 1102 disposed on the fixing ring 1101. The valve plate 1102 can vertically move to open and close the upper discharge port 3. As shown in the figure, the fixing ring 1101 extends laterally to the upper side of the floating body 9 so that the floating body 9 can lift the fixing ring 1101 when it moves upward. A guide rod 15 is provided at the top of the floating body 9. The guide rod 15 slidably passes through the top wall of the aeration chamber. A connecting rope 12 connects the fixing ring 1101 and the side of the floating body 9. In the illustrated embodiment, the valve plate 1102 adopts an independent valve plate 1102 corresponding to each upper discharge port 3. In order to ensure the stability of the movement of the upper discharge valve 11, a guide block is also provided between adjacent upper discharge ports 3. The valve plate 1102 is slidably disposed between two guide blocks. In a preferred embodiment, an integral valve plate 1102 can also be used. In a preferred embodiment, a rubber layer may be provided on the outer surface of the valve plate 1102 to improve the anti-leakage capability when closed.

[0048] Regarding the opening and closing structure of the upper discharge port 3, in an optional embodiment, more specifically, the strong oxidation treatment device further includes: an upper discharge valve 11, disposed at the upper discharge port 3, the upper discharge valve 11 having a starting block; a trigger bracket connected to the floating body 9, the trigger bracket having an upper trigger block and a lower trigger block spaced vertically at the position of the upper discharge valve 11; wherein, when the floating body 9 drives the trigger bracket to move upward until the lower trigger block pushes the starting block, the upper discharge valve 11 opens, and when the lower trigger block moves downward until the lower trigger block pushes the starting block, the upper discharge valve 11 closes.

[0049] Specifically, the fixed ring 1101 of the upper exhaust valve 11 can be used as a starting fastener, and the guide rod 15 of the floating body 9 forms part of the trigger bracket. An upper trigger block is set on the part of the guide rod 15 located above the fixed ring 1101, and a lower trigger block is formed on the top surface of the floating body 9. This allows the floating body 9 to gradually push the upper exhaust valve 11 upward when it floats up. When the floating body 9 moves down to a certain position, the upper trigger block begins to contact the fixed ring 1101, so that the upper exhaust valve 11 moves downward to close the upper exhaust port 3.

[0050] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0051] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A strong oxidation treatment device for formaldehyde wastewater, characterized in that, include: An aeration chamber includes a first chamber wall with an aeration chamber. A filter wall is formed on the portion of the first chamber wall near its bottom. An openable and closable upper discharge port is provided on the portion of the first chamber wall near its top. An overflow collection tank is provided on the outer side of the aeration chamber at a position corresponding to the upper discharge port, so that when the liquid level in the aeration chamber is higher than the upper discharge port and the upper discharge port is opened, the upper discharge port can discharge the liquid inside the first chamber wall to the overflow collection tank. An openable and closable slag discharge port is provided on the bottom wall of the aeration chamber. An aeration element has an aeration head disposed in the aeration chamber, the aeration head being located on the upper side of the filter wall, and ozone is introduced into the aeration element for aeration; A cleaning assembly includes a cleaning frame that can move up and down and a drive unit that moves the cleaning frame. The cleaning frame has a cleaning brush that can contact the filter wall, so that the drive unit moves the cleaning frame to clean the surface of the filter wall. A catalytic chamber, comprising a second chamber wall having a catalytic cavity, the bottom of which is connected to the aeration chamber via the filter wall, and a catalytic element being provided inside the catalytic cavity; The cleaning rack is equipped with a counterweight, and the driving component includes a floating body and a connecting member connecting the floating body and the cleaning rack. The floating body and the counterweight are arranged such that when the floating body rises, it can drive the cleaning rack to move upward, and when the floating body moves downward, the counterweight drives the cleaning rack to move downward. The strong oxidation treatment device further includes an upper discharge valve disposed at the upper discharge port, and the floating body is provided with a connecting rope connected to the upper discharge valve; wherein, when the floating body moves downward to the point where it can pull the upper discharge valve downward, the upper discharge valve closes; when the floating body moves upward to a set position, it can push the upper discharge valve to open the upper discharge port, or... The strong oxidation treatment device further includes: an upper discharge valve disposed at the upper discharge port, the upper discharge valve having a starting block; a trigger bracket connected to the floating body, the trigger bracket having an upper trigger block and a lower trigger block spaced vertically at the position of the upper discharge valve; wherein, when the floating body drives the trigger bracket to move upward until the lower trigger block pushes the starting block, the upper discharge valve opens, and when the lower trigger block moves downward until the lower trigger block pushes the starting block, the upper discharge valve closes.

2. The strong oxidation treatment device for formaldehyde wastewater according to claim 1, characterized in that, The second bulkhead includes a first annular wall surrounding the outside of the first bulkhead, with a gap between the first annular wall and the first bulkhead.

3. The strong oxidation treatment device for formaldehyde wastewater according to claim 2, characterized in that, The filter wall is configured to surround the aeration chamber circumferentially.

4. The strong oxidation treatment device for formaldehyde wastewater according to claim 1, characterized in that, The upper discharge valve includes a fixed ring and a valve plate disposed on the fixed ring, the valve plate being capable of opening and closing the upper discharge port by vertical movement.

5. The strong oxidation treatment device for formaldehyde wastewater according to claim 1, characterized in that, The bottom wall of the aeration chamber gradually slopes downward from its edge to the center, and the slag discharge port is located in the center of the bottom wall of the aeration chamber.

6. The strong oxidation treatment device for formaldehyde wastewater according to claim 2, characterized in that, The catalyst chamber also includes a second annular wall surrounding the outside of the first annular wall, and there is a gap between the first annular wall and the second annular wall; The top of the first annular wall forms a space through which water flows between the inner and outer sides of the first annular wall.

7. The strong oxidation treatment device for formaldehyde wastewater according to claim 6, characterized in that, The first annular wall is fitted with an ultraviolet lamp tube, and a catalyst is provided between the first chamber wall and the first annular wall and / or between the first annular wall and the second annular wall.

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